Index: head/sys/net80211/ieee80211_adhoc.c =================================================================== --- head/sys/net80211/ieee80211_adhoc.c (revision 298375) +++ head/sys/net80211/ieee80211_adhoc.c (revision 298376) @@ -1,955 +1,954 @@ /*- * Copyright (c) 2007-2009 Sam Leffler, Errno Consulting * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include #ifdef __FreeBSD__ __FBSDID("$FreeBSD$"); #endif /* * IEEE 802.11 IBSS mode support. */ #include "opt_inet.h" #include "opt_wlan.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef IEEE80211_SUPPORT_SUPERG #include #endif #ifdef IEEE80211_SUPPORT_TDMA #include #endif #include #define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2) static void adhoc_vattach(struct ieee80211vap *); static int adhoc_newstate(struct ieee80211vap *, enum ieee80211_state, int); static int adhoc_input(struct ieee80211_node *, struct mbuf *, const struct ieee80211_rx_stats *, int, int); static void adhoc_recv_mgmt(struct ieee80211_node *, struct mbuf *, int subtype, const struct ieee80211_rx_stats *, int, int); static void ahdemo_recv_mgmt(struct ieee80211_node *, struct mbuf *, int subtype, const struct ieee80211_rx_stats *rxs, int, int); static void adhoc_recv_ctl(struct ieee80211_node *, struct mbuf *, int subtype); void ieee80211_adhoc_attach(struct ieee80211com *ic) { ic->ic_vattach[IEEE80211_M_IBSS] = adhoc_vattach; ic->ic_vattach[IEEE80211_M_AHDEMO] = adhoc_vattach; } void ieee80211_adhoc_detach(struct ieee80211com *ic) { } static void adhoc_vdetach(struct ieee80211vap *vap) { } static void adhoc_vattach(struct ieee80211vap *vap) { vap->iv_newstate = adhoc_newstate; vap->iv_input = adhoc_input; if (vap->iv_opmode == IEEE80211_M_IBSS) vap->iv_recv_mgmt = adhoc_recv_mgmt; else vap->iv_recv_mgmt = ahdemo_recv_mgmt; vap->iv_recv_ctl = adhoc_recv_ctl; vap->iv_opdetach = adhoc_vdetach; #ifdef IEEE80211_SUPPORT_TDMA /* * Throw control to tdma support. Note we do this * after setting up our callbacks so it can piggyback * on top of us. */ if (vap->iv_caps & IEEE80211_C_TDMA) ieee80211_tdma_vattach(vap); #endif } static void sta_leave(void *arg, struct ieee80211_node *ni) { struct ieee80211vap *vap = arg; if (ni->ni_vap == vap && ni != vap->iv_bss) ieee80211_node_leave(ni); } /* * IEEE80211_M_IBSS+IEEE80211_M_AHDEMO vap state machine handler. */ static int adhoc_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) { struct ieee80211com *ic = vap->iv_ic; struct ieee80211_node *ni; enum ieee80211_state ostate; IEEE80211_LOCK_ASSERT(vap->iv_ic); ostate = vap->iv_state; IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", __func__, ieee80211_state_name[ostate], ieee80211_state_name[nstate], arg); vap->iv_state = nstate; /* state transition */ if (ostate != IEEE80211_S_SCAN) ieee80211_cancel_scan(vap); /* background scan */ ni = vap->iv_bss; /* NB: no reference held */ switch (nstate) { case IEEE80211_S_INIT: switch (ostate) { case IEEE80211_S_SCAN: ieee80211_cancel_scan(vap); break; default: break; } if (ostate != IEEE80211_S_INIT) { /* NB: optimize INIT -> INIT case */ ieee80211_reset_bss(vap); } break; case IEEE80211_S_SCAN: switch (ostate) { case IEEE80211_S_RUN: /* beacon miss */ /* purge station table; entries are stale */ ieee80211_iterate_nodes(&ic->ic_sta, sta_leave, vap); /* fall thru... */ case IEEE80211_S_INIT: if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan)) { /* * Already have a channel; bypass the * scan and startup immediately. */ ieee80211_create_ibss(vap, ieee80211_ht_adjust_channel(ic, vap->iv_des_chan, vap->iv_flags_ht)); break; } /* * Initiate a scan. We can come here as a result * of an IEEE80211_IOC_SCAN_REQ too in which case * the vap will be marked with IEEE80211_FEXT_SCANREQ * and the scan request parameters will be present * in iv_scanreq. Otherwise we do the default. */ if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { ieee80211_check_scan(vap, vap->iv_scanreq_flags, vap->iv_scanreq_duration, vap->iv_scanreq_mindwell, vap->iv_scanreq_maxdwell, vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; } else ieee80211_check_scan_current(vap); break; case IEEE80211_S_SCAN: /* * This can happen because of a change in state * that requires a reset. Trigger a new scan * unless we're in manual roaming mode in which * case an application must issue an explicit request. */ if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) ieee80211_check_scan_current(vap); break; default: goto invalid; } break; case IEEE80211_S_RUN: if (vap->iv_flags & IEEE80211_F_WPA) { /* XXX validate prerequisites */ } switch (ostate) { case IEEE80211_S_SCAN: #ifdef IEEE80211_DEBUG if (ieee80211_msg_debug(vap)) { ieee80211_note(vap, "synchronized with %s ssid ", ether_sprintf(ni->ni_bssid)); ieee80211_print_essid(vap->iv_bss->ni_essid, ni->ni_esslen); /* XXX MCS/HT */ printf(" channel %d start %uMb\n", ieee80211_chan2ieee(ic, ic->ic_curchan), IEEE80211_RATE2MBS(ni->ni_txrate)); } #endif break; case IEEE80211_S_RUN: /* IBSS merge */ break; default: goto invalid; } /* * When 802.1x is not in use mark the port authorized * at this point so traffic can flow. */ if (ni->ni_authmode != IEEE80211_AUTH_8021X) ieee80211_node_authorize(ni); /* * Fake association when joining an existing bss. */ if (!IEEE80211_ADDR_EQ(ni->ni_macaddr, vap->iv_myaddr) && ic->ic_newassoc != NULL) ic->ic_newassoc(ni, ostate != IEEE80211_S_RUN); break; case IEEE80211_S_SLEEP: vap->iv_sta_ps(vap, 0); break; default: invalid: IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: unexpected state transition %s -> %s\n", __func__, ieee80211_state_name[ostate], ieee80211_state_name[nstate]); break; } return 0; } /* * Decide if a received management frame should be * printed when debugging is enabled. This filters some * of the less interesting frames that come frequently * (e.g. beacons). */ static __inline int doprint(struct ieee80211vap *vap, int subtype) { switch (subtype) { case IEEE80211_FC0_SUBTYPE_BEACON: return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN); case IEEE80211_FC0_SUBTYPE_PROBE_REQ: return 1; } return 1; } /* * Process a received frame. The node associated with the sender * should be supplied. If nothing was found in the node table then * the caller is assumed to supply a reference to iv_bss instead. * The RSSI and a timestamp are also supplied. The RSSI data is used * during AP scanning to select a AP to associate with; it can have * any units so long as values have consistent units and higher values * mean ``better signal''. The receive timestamp is currently not used * by the 802.11 layer. */ static int adhoc_input(struct ieee80211_node *ni, struct mbuf *m, const struct ieee80211_rx_stats *rxs, int rssi, int nf) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; struct ifnet *ifp = vap->iv_ifp; struct ieee80211_frame *wh; struct ieee80211_key *key; struct ether_header *eh; int hdrspace, need_tap = 1; /* mbuf need to be tapped. */ uint8_t dir, type, subtype, qos; uint8_t *bssid; if (m->m_flags & M_AMPDU_MPDU) { /* * Fastpath for A-MPDU reorder q resubmission. Frames * w/ M_AMPDU_MPDU marked have already passed through * here but were received out of order and been held on * the reorder queue. When resubmitted they are marked * with the M_AMPDU_MPDU flag and we can bypass most of * the normal processing. */ wh = mtod(m, struct ieee80211_frame *); type = IEEE80211_FC0_TYPE_DATA; dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; subtype = IEEE80211_FC0_SUBTYPE_QOS; hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ goto resubmit_ampdu; } KASSERT(ni != NULL, ("null node")); ni->ni_inact = ni->ni_inact_reload; type = -1; /* undefined */ if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, "too short (1): len %u", m->m_pkthdr.len); vap->iv_stats.is_rx_tooshort++; goto out; } /* * Bit of a cheat here, we use a pointer for a 3-address * frame format but don't reference fields past outside * ieee80211_frame_min w/o first validating the data is * present. */ wh = mtod(m, struct ieee80211_frame *); if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != IEEE80211_FC0_VERSION_0) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x", wh->i_fc[0], wh->i_fc[1]); vap->iv_stats.is_rx_badversion++; goto err; } dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { if (dir != IEEE80211_FC1_DIR_NODS) bssid = wh->i_addr1; else if (type == IEEE80211_FC0_TYPE_CTL) bssid = wh->i_addr1; else { if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, "too short (2): len %u", m->m_pkthdr.len); vap->iv_stats.is_rx_tooshort++; goto out; } bssid = wh->i_addr3; } /* * Validate the bssid. */ if (!IEEE80211_ADDR_EQ(bssid, vap->iv_bss->ni_bssid) && !IEEE80211_ADDR_EQ(bssid, ifp->if_broadcastaddr)) { /* not interested in */ IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, bssid, NULL, "%s", "not to bss"); vap->iv_stats.is_rx_wrongbss++; goto out; } /* * Data frame, cons up a node when it doesn't * exist. This should probably done after an ACL check. */ if (type == IEEE80211_FC0_TYPE_DATA && ni == vap->iv_bss && !IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { /* * Beware of frames that come in too early; we * can receive broadcast frames and creating sta * entries will blow up because there is no bss * channel yet. */ if (vap->iv_state != IEEE80211_S_RUN) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "data", "not in RUN state (%s)", ieee80211_state_name[vap->iv_state]); vap->iv_stats.is_rx_badstate++; goto err; } /* * Fake up a node for this newly * discovered member of the IBSS. */ ni = ieee80211_fakeup_adhoc_node(vap, wh->i_addr2); if (ni == NULL) { /* NB: stat kept for alloc failure */ goto err; } } IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); ni->ni_noise = nf; if (IEEE80211_HAS_SEQ(type, subtype) && IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { uint8_t tid = ieee80211_gettid(wh); if (IEEE80211_QOS_HAS_SEQ(wh) && TID_TO_WME_AC(tid) >= WME_AC_VI) ic->ic_wme.wme_hipri_traffic++; if (! ieee80211_check_rxseq(ni, wh, bssid)) goto out; } } switch (type) { case IEEE80211_FC0_TYPE_DATA: hdrspace = ieee80211_hdrspace(ic, wh); if (m->m_len < hdrspace && (m = m_pullup(m, hdrspace)) == NULL) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, "data too short: expecting %u", hdrspace); vap->iv_stats.is_rx_tooshort++; goto out; /* XXX */ } if (dir != IEEE80211_FC1_DIR_NODS) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "data", "incorrect dir 0x%x", dir); vap->iv_stats.is_rx_wrongdir++; goto out; } /* XXX no power-save support */ /* * Handle A-MPDU re-ordering. If the frame is to be * processed directly then ieee80211_ampdu_reorder * will return 0; otherwise it has consumed the mbuf * and we should do nothing more with it. */ if ((m->m_flags & M_AMPDU) && ieee80211_ampdu_reorder(ni, m) != 0) { m = NULL; goto out; } resubmit_ampdu: /* * Handle privacy requirements. Note that we * must not be preempted from here until after * we (potentially) call ieee80211_crypto_demic; * otherwise we may violate assumptions in the * crypto cipher modules used to do delayed update * of replay sequence numbers. */ if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { /* * Discard encrypted frames when privacy is off. */ IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "WEP", "%s", "PRIVACY off"); vap->iv_stats.is_rx_noprivacy++; IEEE80211_NODE_STAT(ni, rx_noprivacy); goto out; } key = ieee80211_crypto_decap(ni, m, hdrspace); if (key == NULL) { /* NB: stats+msgs handled in crypto_decap */ IEEE80211_NODE_STAT(ni, rx_wepfail); goto out; } wh = mtod(m, struct ieee80211_frame *); wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; } else { /* XXX M_WEP and IEEE80211_F_PRIVACY */ key = NULL; } /* * Save QoS bits for use below--before we strip the header. */ if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : ((struct ieee80211_qosframe *)wh)->i_qos[0]; } else qos = 0; /* * Next up, any fragmentation. */ if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { m = ieee80211_defrag(ni, m, hdrspace); if (m == NULL) { /* Fragment dropped or frame not complete yet */ goto out; } } wh = NULL; /* no longer valid, catch any uses */ /* * Next strip any MSDU crypto bits. */ if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, ni->ni_macaddr, "data", "%s", "demic error"); vap->iv_stats.is_rx_demicfail++; IEEE80211_NODE_STAT(ni, rx_demicfail); goto out; } /* copy to listener after decrypt */ if (ieee80211_radiotap_active_vap(vap)) ieee80211_radiotap_rx(vap, m); need_tap = 0; /* * Finally, strip the 802.11 header. */ m = ieee80211_decap(vap, m, hdrspace); if (m == NULL) { /* XXX mask bit to check for both */ /* don't count Null data frames as errors */ if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) goto out; IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, ni->ni_macaddr, "data", "%s", "decap error"); vap->iv_stats.is_rx_decap++; IEEE80211_NODE_STAT(ni, rx_decap); goto err; } eh = mtod(m, struct ether_header *); if (!ieee80211_node_is_authorized(ni)) { /* * Deny any non-PAE frames received prior to * authorization. For open/shared-key * authentication the port is mark authorized * after authentication completes. For 802.1x * the port is not marked authorized by the * authenticator until the handshake has completed. */ if (eh->ether_type != htons(ETHERTYPE_PAE)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, eh->ether_shost, "data", "unauthorized port: ether type 0x%x len %u", eh->ether_type, m->m_pkthdr.len); vap->iv_stats.is_rx_unauth++; IEEE80211_NODE_STAT(ni, rx_unauth); goto err; } } else { /* * When denying unencrypted frames, discard * any non-PAE frames received without encryption. */ if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && (key == NULL && (m->m_flags & M_WEP) == 0) && eh->ether_type != htons(ETHERTYPE_PAE)) { /* * Drop unencrypted frames. */ vap->iv_stats.is_rx_unencrypted++; IEEE80211_NODE_STAT(ni, rx_unencrypted); goto out; } } /* XXX require HT? */ if (qos & IEEE80211_QOS_AMSDU) { m = ieee80211_decap_amsdu(ni, m); if (m == NULL) return IEEE80211_FC0_TYPE_DATA; } else { #ifdef IEEE80211_SUPPORT_SUPERG m = ieee80211_decap_fastframe(vap, ni, m); if (m == NULL) return IEEE80211_FC0_TYPE_DATA; #endif } if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap != NULL) ieee80211_deliver_data(ni->ni_wdsvap, ni, m); else ieee80211_deliver_data(vap, ni, m); return IEEE80211_FC0_TYPE_DATA; case IEEE80211_FC0_TYPE_MGT: vap->iv_stats.is_rx_mgmt++; IEEE80211_NODE_STAT(ni, rx_mgmt); if (dir != IEEE80211_FC1_DIR_NODS) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "data", "incorrect dir 0x%x", dir); vap->iv_stats.is_rx_wrongdir++; goto err; } if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, "mgt", "too short: len %u", m->m_pkthdr.len); vap->iv_stats.is_rx_tooshort++; goto out; } #ifdef IEEE80211_DEBUG if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) || ieee80211_msg_dumppkts(vap)) { if_printf(ifp, "received %s from %s rssi %d\n", - ieee80211_mgt_subtype_name[subtype >> - IEEE80211_FC0_SUBTYPE_SHIFT], + ieee80211_mgt_subtype_name(subtype), ether_sprintf(wh->i_addr2), rssi); } #endif if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "WEP set but not permitted"); vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ goto out; } vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); goto out; case IEEE80211_FC0_TYPE_CTL: vap->iv_stats.is_rx_ctl++; IEEE80211_NODE_STAT(ni, rx_ctrl); vap->iv_recv_ctl(ni, m, subtype); goto out; default: IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, wh, "bad", "frame type 0x%x", type); /* should not come here */ break; } err: if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); out: if (m != NULL) { if (need_tap && ieee80211_radiotap_active_vap(vap)) ieee80211_radiotap_rx(vap, m); m_freem(m); } return type; } static int is11bclient(const uint8_t *rates, const uint8_t *xrates) { static const uint32_t brates = (1<<2*1)|(1<<2*2)|(1<<11)|(1<<2*11); int i; /* NB: the 11b clients we care about will not have xrates */ if (xrates != NULL || rates == NULL) return 0; for (i = 0; i < rates[1]; i++) { int r = rates[2+i] & IEEE80211_RATE_VAL; if (r > 2*11 || ((1<ni_vap; struct ieee80211com *ic = ni->ni_ic; struct ieee80211_channel *rxchan = ic->ic_curchan; struct ieee80211_frame *wh; uint8_t *frm, *efrm, *sfrm; uint8_t *ssid, *rates, *xrates; #if 0 int ht_state_change = 0; #endif wh = mtod(m0, struct ieee80211_frame *); frm = (uint8_t *)&wh[1]; efrm = mtod(m0, uint8_t *) + m0->m_len; switch (subtype) { case IEEE80211_FC0_SUBTYPE_PROBE_RESP: case IEEE80211_FC0_SUBTYPE_BEACON: { struct ieee80211_scanparams scan; struct ieee80211_channel *c; /* * We process beacon/probe response * frames to discover neighbors. */ if (rxs != NULL) { c = ieee80211_lookup_channel_rxstatus(vap, rxs); if (c != NULL) rxchan = c; } if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0) return; /* * Count frame now that we know it's to be processed. */ if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { vap->iv_stats.is_rx_beacon++; /* XXX remove */ IEEE80211_NODE_STAT(ni, rx_beacons); } else IEEE80211_NODE_STAT(ni, rx_proberesp); /* * If scanning, just pass information to the scan module. */ if (ic->ic_flags & IEEE80211_F_SCAN) { if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { /* * Actively scanning a channel marked passive; * send a probe request now that we know there * is 802.11 traffic present. * * XXX check if the beacon we recv'd gives * us what we need and suppress the probe req */ ieee80211_probe_curchan(vap, 1); ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; } ieee80211_add_scan(vap, rxchan, &scan, wh, subtype, rssi, nf); return; } if (scan.capinfo & IEEE80211_CAPINFO_IBSS) { if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { /* * Create a new entry in the neighbor table. */ ni = ieee80211_add_neighbor(vap, wh, &scan); } else if (ni->ni_capinfo == 0) { /* * Update faked node created on transmit. * Note this also updates the tsf. */ ieee80211_init_neighbor(ni, wh, &scan); } else { /* * Record tsf for potential resync. */ memcpy(ni->ni_tstamp.data, scan.tstamp, sizeof(ni->ni_tstamp)); } /* * This isn't enabled yet - otherwise it would * update the HT parameters and channel width * from any node, which could lead to lots of * strange behaviour if the 11n nodes aren't * exactly configured to match. */ #if 0 if (scan.htcap != NULL && scan.htinfo != NULL && (vap->iv_flags_ht & IEEE80211_FHT_HT)) { if (ieee80211_ht_updateparams(ni, scan.htcap, scan.htinfo)) ht_state_change = 1; } #endif if (ni != NULL) { IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); ni->ni_noise = nf; } /* * Same here - the channel width change should * be applied to the specific peer node, not * to the ic. Ie, the interface configuration * should stay in its current channel width; * but it should change the rate control and * any queued frames for the given node only. * * Since there's no (current) way to inform * the driver that a channel width change has * occured for a single node, just stub this * out. */ #if 0 if (ht_state_change) ieee80211_update_chw(ic); #endif } break; } case IEEE80211_FC0_SUBTYPE_PROBE_REQ: if (vap->iv_state != IEEE80211_S_RUN) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "wrong state %s", ieee80211_state_name[vap->iv_state]); vap->iv_stats.is_rx_mgtdiscard++; return; } if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { /* frame must be directed */ IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "not unicast"); vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ return; } /* * prreq frame format * [tlv] ssid * [tlv] supported rates * [tlv] extended supported rates */ ssid = rates = xrates = NULL; sfrm = frm; while (efrm - frm > 1) { IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); switch (*frm) { case IEEE80211_ELEMID_SSID: ssid = frm; break; case IEEE80211_ELEMID_RATES: rates = frm; break; case IEEE80211_ELEMID_XRATES: xrates = frm; break; } frm += frm[1] + 2; } IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); if (xrates != NULL) IEEE80211_VERIFY_ELEMENT(xrates, IEEE80211_RATE_MAXSIZE - rates[1], return); IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return); if ((vap->iv_flags & IEEE80211_F_HIDESSID) && ssid[1] == 0) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "no ssid with ssid suppression enabled"); vap->iv_stats.is_rx_ssidmismatch++; /*XXX*/ return; } /* XXX find a better class or define it's own */ IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, "%s", "recv probe req"); /* * Some legacy 11b clients cannot hack a complete * probe response frame. When the request includes * only a bare-bones rate set, communicate this to * the transmit side. */ ieee80211_send_proberesp(vap, wh->i_addr2, is11bclient(rates, xrates) ? IEEE80211_SEND_LEGACY_11B : 0); break; case IEEE80211_FC0_SUBTYPE_ACTION: case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: if (ni == vap->iv_bss) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "unknown node"); vap->iv_stats.is_rx_mgtdiscard++; } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && !IEEE80211_IS_MULTICAST(wh->i_addr1)) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "not for us"); vap->iv_stats.is_rx_mgtdiscard++; } else if (vap->iv_state != IEEE80211_S_RUN) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "wrong state %s", ieee80211_state_name[vap->iv_state]); vap->iv_stats.is_rx_mgtdiscard++; } else { if (ieee80211_parse_action(ni, m0) == 0) (void)ic->ic_recv_action(ni, wh, frm, efrm); } break; case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: case IEEE80211_FC0_SUBTYPE_TIMING_ADV: case IEEE80211_FC0_SUBTYPE_ATIM: case IEEE80211_FC0_SUBTYPE_DISASSOC: case IEEE80211_FC0_SUBTYPE_AUTH: case IEEE80211_FC0_SUBTYPE_DEAUTH: IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "not handled"); vap->iv_stats.is_rx_mgtdiscard++; break; default: IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, wh, "mgt", "subtype 0x%x not handled", subtype); vap->iv_stats.is_rx_badsubtype++; break; } } #undef IEEE80211_VERIFY_LENGTH #undef IEEE80211_VERIFY_ELEMENT static void ahdemo_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, const struct ieee80211_rx_stats *rxs, int rssi, int nf) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; struct ieee80211_frame *wh; /* * Process management frames when scanning; useful for doing * a site-survey. */ if (ic->ic_flags & IEEE80211_F_SCAN) adhoc_recv_mgmt(ni, m0, subtype, rxs, rssi, nf); else { wh = mtod(m0, struct ieee80211_frame *); switch (subtype) { case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: case IEEE80211_FC0_SUBTYPE_PROBE_REQ: case IEEE80211_FC0_SUBTYPE_PROBE_RESP: case IEEE80211_FC0_SUBTYPE_TIMING_ADV: case IEEE80211_FC0_SUBTYPE_BEACON: case IEEE80211_FC0_SUBTYPE_ATIM: case IEEE80211_FC0_SUBTYPE_DISASSOC: case IEEE80211_FC0_SUBTYPE_AUTH: case IEEE80211_FC0_SUBTYPE_DEAUTH: case IEEE80211_FC0_SUBTYPE_ACTION: case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "not handled"); vap->iv_stats.is_rx_mgtdiscard++; break; default: IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, wh, "mgt", "subtype 0x%x not handled", subtype); vap->iv_stats.is_rx_badsubtype++; break; } } } static void adhoc_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) { switch (subtype) { case IEEE80211_FC0_SUBTYPE_BAR: ieee80211_recv_bar(ni, m); break; } } Index: head/sys/net80211/ieee80211_hostap.c =================================================================== --- head/sys/net80211/ieee80211_hostap.c (revision 298375) +++ head/sys/net80211/ieee80211_hostap.c (revision 298376) @@ -1,2329 +1,2327 @@ /*- * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include #ifdef __FreeBSD__ __FBSDID("$FreeBSD$"); #endif /* * IEEE 802.11 HOSTAP mode support. */ #include "opt_inet.h" #include "opt_wlan.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef IEEE80211_SUPPORT_SUPERG #include #endif #include #define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2) static void hostap_vattach(struct ieee80211vap *); static int hostap_newstate(struct ieee80211vap *, enum ieee80211_state, int); static int hostap_input(struct ieee80211_node *ni, struct mbuf *m, const struct ieee80211_rx_stats *, int rssi, int nf); static void hostap_deliver_data(struct ieee80211vap *, struct ieee80211_node *, struct mbuf *); static void hostap_recv_mgmt(struct ieee80211_node *, struct mbuf *, int subtype, const struct ieee80211_rx_stats *rxs, int rssi, int nf); static void hostap_recv_ctl(struct ieee80211_node *, struct mbuf *, int); void ieee80211_hostap_attach(struct ieee80211com *ic) { ic->ic_vattach[IEEE80211_M_HOSTAP] = hostap_vattach; } void ieee80211_hostap_detach(struct ieee80211com *ic) { } static void hostap_vdetach(struct ieee80211vap *vap) { } static void hostap_vattach(struct ieee80211vap *vap) { vap->iv_newstate = hostap_newstate; vap->iv_input = hostap_input; vap->iv_recv_mgmt = hostap_recv_mgmt; vap->iv_recv_ctl = hostap_recv_ctl; vap->iv_opdetach = hostap_vdetach; vap->iv_deliver_data = hostap_deliver_data; vap->iv_recv_pspoll = ieee80211_recv_pspoll; } static void sta_disassoc(void *arg, struct ieee80211_node *ni) { struct ieee80211vap *vap = arg; if (ni->ni_vap == vap && ni->ni_associd != 0) { IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DISASSOC, IEEE80211_REASON_ASSOC_LEAVE); ieee80211_node_leave(ni); } } static void sta_csa(void *arg, struct ieee80211_node *ni) { struct ieee80211vap *vap = arg; if (ni->ni_vap == vap && ni->ni_associd != 0) if (ni->ni_inact > vap->iv_inact_init) { ni->ni_inact = vap->iv_inact_init; IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, "%s: inact %u", __func__, ni->ni_inact); } } static void sta_drop(void *arg, struct ieee80211_node *ni) { struct ieee80211vap *vap = arg; if (ni->ni_vap == vap && ni->ni_associd != 0) ieee80211_node_leave(ni); } /* * Does a channel change require associated stations to re-associate * so protocol state is correct. This is used when doing CSA across * bands or similar (e.g. HT -> legacy). */ static int isbandchange(struct ieee80211com *ic) { return ((ic->ic_bsschan->ic_flags ^ ic->ic_csa_newchan->ic_flags) & (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_HALF | IEEE80211_CHAN_QUARTER | IEEE80211_CHAN_HT)) != 0; } /* * IEEE80211_M_HOSTAP vap state machine handler. */ static int hostap_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) { struct ieee80211com *ic = vap->iv_ic; enum ieee80211_state ostate; IEEE80211_LOCK_ASSERT(ic); ostate = vap->iv_state; IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", __func__, ieee80211_state_name[ostate], ieee80211_state_name[nstate], arg); vap->iv_state = nstate; /* state transition */ if (ostate != IEEE80211_S_SCAN) ieee80211_cancel_scan(vap); /* background scan */ switch (nstate) { case IEEE80211_S_INIT: switch (ostate) { case IEEE80211_S_SCAN: ieee80211_cancel_scan(vap); break; case IEEE80211_S_CAC: ieee80211_dfs_cac_stop(vap); break; case IEEE80211_S_RUN: ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, vap); break; default: break; } if (ostate != IEEE80211_S_INIT) { /* NB: optimize INIT -> INIT case */ ieee80211_reset_bss(vap); } if (vap->iv_auth->ia_detach != NULL) vap->iv_auth->ia_detach(vap); break; case IEEE80211_S_SCAN: switch (ostate) { case IEEE80211_S_CSA: case IEEE80211_S_RUN: ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, vap); /* * Clear overlapping BSS state; the beacon frame * will be reconstructed on transition to the RUN * state and the timeout routines check if the flag * is set before doing anything so this is sufficient. */ ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; ic->ic_flags_ht &= ~IEEE80211_FHT_NONHT_PR; /* fall thru... */ case IEEE80211_S_CAC: /* * NB: We may get here because of a manual channel * change in which case we need to stop CAC * XXX no need to stop if ostate RUN but it's ok */ ieee80211_dfs_cac_stop(vap); /* fall thru... */ case IEEE80211_S_INIT: if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan)) { /* * Already have a channel; bypass the * scan and startup immediately. * ieee80211_create_ibss will call back to * move us to RUN state. */ ieee80211_create_ibss(vap, vap->iv_des_chan); break; } /* * Initiate a scan. We can come here as a result * of an IEEE80211_IOC_SCAN_REQ too in which case * the vap will be marked with IEEE80211_FEXT_SCANREQ * and the scan request parameters will be present * in iv_scanreq. Otherwise we do the default. */ if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { ieee80211_check_scan(vap, vap->iv_scanreq_flags, vap->iv_scanreq_duration, vap->iv_scanreq_mindwell, vap->iv_scanreq_maxdwell, vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; } else ieee80211_check_scan_current(vap); break; case IEEE80211_S_SCAN: /* * A state change requires a reset; scan. */ ieee80211_check_scan_current(vap); break; default: break; } break; case IEEE80211_S_CAC: /* * Start CAC on a DFS channel. We come here when starting * a bss on a DFS channel (see ieee80211_create_ibss). */ ieee80211_dfs_cac_start(vap); break; case IEEE80211_S_RUN: if (vap->iv_flags & IEEE80211_F_WPA) { /* XXX validate prerequisites */ } switch (ostate) { case IEEE80211_S_INIT: /* * Already have a channel; bypass the * scan and startup immediately. * Note that ieee80211_create_ibss will call * back to do a RUN->RUN state change. */ ieee80211_create_ibss(vap, ieee80211_ht_adjust_channel(ic, ic->ic_curchan, vap->iv_flags_ht)); /* NB: iv_bss is changed on return */ break; case IEEE80211_S_CAC: /* * NB: This is the normal state change when CAC * expires and no radar was detected; no need to * clear the CAC timer as it's already expired. */ /* fall thru... */ case IEEE80211_S_CSA: /* * Shorten inactivity timer of associated stations * to weed out sta's that don't follow a CSA. */ ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); /* * Update bss node channel to reflect where * we landed after CSA. */ ieee80211_node_set_chan(vap->iv_bss, ieee80211_ht_adjust_channel(ic, ic->ic_curchan, ieee80211_htchanflags(vap->iv_bss->ni_chan))); /* XXX bypass debug msgs */ break; case IEEE80211_S_SCAN: case IEEE80211_S_RUN: #ifdef IEEE80211_DEBUG if (ieee80211_msg_debug(vap)) { struct ieee80211_node *ni = vap->iv_bss; ieee80211_note(vap, "synchronized with %s ssid ", ether_sprintf(ni->ni_bssid)); ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); /* XXX MCS/HT */ printf(" channel %d start %uMb\n", ieee80211_chan2ieee(ic, ic->ic_curchan), IEEE80211_RATE2MBS(ni->ni_txrate)); } #endif break; default: break; } /* * Start/stop the authenticator. We delay until here * to allow configuration to happen out of order. */ if (vap->iv_auth->ia_attach != NULL) { /* XXX check failure */ vap->iv_auth->ia_attach(vap); } else if (vap->iv_auth->ia_detach != NULL) { vap->iv_auth->ia_detach(vap); } ieee80211_node_authorize(vap->iv_bss); break; case IEEE80211_S_CSA: if (ostate == IEEE80211_S_RUN && isbandchange(ic)) { /* * On a ``band change'' silently drop associated * stations as they must re-associate before they * can pass traffic (as otherwise protocol state * such as capabilities and the negotiated rate * set may/will be wrong). */ ieee80211_iterate_nodes(&ic->ic_sta, sta_drop, vap); } break; default: break; } return 0; } static void hostap_deliver_data(struct ieee80211vap *vap, struct ieee80211_node *ni, struct mbuf *m) { struct ether_header *eh = mtod(m, struct ether_header *); struct ifnet *ifp = vap->iv_ifp; /* clear driver/net80211 flags before passing up */ m->m_flags &= ~(M_MCAST | M_BCAST); m_clrprotoflags(m); KASSERT(vap->iv_opmode == IEEE80211_M_HOSTAP, ("gack, opmode %d", vap->iv_opmode)); /* * Do accounting. */ if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1); IEEE80211_NODE_STAT(ni, rx_data); IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len); if (ETHER_IS_MULTICAST(eh->ether_dhost)) { m->m_flags |= M_MCAST; /* XXX M_BCAST? */ IEEE80211_NODE_STAT(ni, rx_mcast); } else IEEE80211_NODE_STAT(ni, rx_ucast); /* perform as a bridge within the AP */ if ((vap->iv_flags & IEEE80211_F_NOBRIDGE) == 0) { struct mbuf *mcopy = NULL; if (m->m_flags & M_MCAST) { mcopy = m_dup(m, M_NOWAIT); if (mcopy == NULL) if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); else mcopy->m_flags |= M_MCAST; } else { /* * Check if the destination is associated with the * same vap and authorized to receive traffic. * Beware of traffic destined for the vap itself; * sending it will not work; just let it be delivered * normally. */ struct ieee80211_node *sta = ieee80211_find_vap_node( &vap->iv_ic->ic_sta, vap, eh->ether_dhost); if (sta != NULL) { if (ieee80211_node_is_authorized(sta)) { /* * Beware of sending to ourself; this * needs to happen via the normal * input path. */ if (sta != vap->iv_bss) { mcopy = m; m = NULL; } } else { vap->iv_stats.is_rx_unauth++; IEEE80211_NODE_STAT(sta, rx_unauth); } ieee80211_free_node(sta); } } if (mcopy != NULL) { int len, err; len = mcopy->m_pkthdr.len; err = ieee80211_vap_xmitpkt(vap, mcopy); if (err) { /* NB: IFQ_HANDOFF reclaims mcopy */ } else { if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); } } } if (m != NULL) { /* * Mark frame as coming from vap's interface. */ m->m_pkthdr.rcvif = ifp; if (m->m_flags & M_MCAST) { /* * Spam DWDS vap's w/ multicast traffic. */ /* XXX only if dwds in use? */ ieee80211_dwds_mcast(vap, m); } if (ni->ni_vlan != 0) { /* attach vlan tag */ m->m_pkthdr.ether_vtag = ni->ni_vlan; m->m_flags |= M_VLANTAG; } ifp->if_input(ifp, m); } } /* * Decide if a received management frame should be * printed when debugging is enabled. This filters some * of the less interesting frames that come frequently * (e.g. beacons). */ static __inline int doprint(struct ieee80211vap *vap, int subtype) { switch (subtype) { case IEEE80211_FC0_SUBTYPE_BEACON: return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN); case IEEE80211_FC0_SUBTYPE_PROBE_REQ: return 0; } return 1; } /* * Process a received frame. The node associated with the sender * should be supplied. If nothing was found in the node table then * the caller is assumed to supply a reference to iv_bss instead. * The RSSI and a timestamp are also supplied. The RSSI data is used * during AP scanning to select a AP to associate with; it can have * any units so long as values have consistent units and higher values * mean ``better signal''. The receive timestamp is currently not used * by the 802.11 layer. */ static int hostap_input(struct ieee80211_node *ni, struct mbuf *m, const struct ieee80211_rx_stats *rxs, int rssi, int nf) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; struct ifnet *ifp = vap->iv_ifp; struct ieee80211_frame *wh; struct ieee80211_key *key; struct ether_header *eh; int hdrspace, need_tap = 1; /* mbuf need to be tapped. */ uint8_t dir, type, subtype, qos; uint8_t *bssid; if (m->m_flags & M_AMPDU_MPDU) { /* * Fastpath for A-MPDU reorder q resubmission. Frames * w/ M_AMPDU_MPDU marked have already passed through * here but were received out of order and been held on * the reorder queue. When resubmitted they are marked * with the M_AMPDU_MPDU flag and we can bypass most of * the normal processing. */ wh = mtod(m, struct ieee80211_frame *); type = IEEE80211_FC0_TYPE_DATA; dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; subtype = IEEE80211_FC0_SUBTYPE_QOS; hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ goto resubmit_ampdu; } KASSERT(ni != NULL, ("null node")); ni->ni_inact = ni->ni_inact_reload; type = -1; /* undefined */ if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, "too short (1): len %u", m->m_pkthdr.len); vap->iv_stats.is_rx_tooshort++; goto out; } /* * Bit of a cheat here, we use a pointer for a 3-address * frame format but don't reference fields past outside * ieee80211_frame_min w/o first validating the data is * present. */ wh = mtod(m, struct ieee80211_frame *); if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != IEEE80211_FC0_VERSION_0) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x", wh->i_fc[0], wh->i_fc[1]); vap->iv_stats.is_rx_badversion++; goto err; } dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { if (dir != IEEE80211_FC1_DIR_NODS) bssid = wh->i_addr1; else if (type == IEEE80211_FC0_TYPE_CTL) bssid = wh->i_addr1; else { if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, "too short (2): len %u", m->m_pkthdr.len); vap->iv_stats.is_rx_tooshort++; goto out; } bssid = wh->i_addr3; } /* * Validate the bssid. */ if (!(type == IEEE80211_FC0_TYPE_MGT && subtype == IEEE80211_FC0_SUBTYPE_BEACON) && !IEEE80211_ADDR_EQ(bssid, vap->iv_bss->ni_bssid) && !IEEE80211_ADDR_EQ(bssid, ifp->if_broadcastaddr)) { /* not interested in */ IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, bssid, NULL, "%s", "not to bss"); vap->iv_stats.is_rx_wrongbss++; goto out; } IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); ni->ni_noise = nf; if (IEEE80211_HAS_SEQ(type, subtype)) { uint8_t tid = ieee80211_gettid(wh); if (IEEE80211_QOS_HAS_SEQ(wh) && TID_TO_WME_AC(tid) >= WME_AC_VI) ic->ic_wme.wme_hipri_traffic++; if (! ieee80211_check_rxseq(ni, wh, bssid)) goto out; } } switch (type) { case IEEE80211_FC0_TYPE_DATA: hdrspace = ieee80211_hdrspace(ic, wh); if (m->m_len < hdrspace && (m = m_pullup(m, hdrspace)) == NULL) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, "data too short: expecting %u", hdrspace); vap->iv_stats.is_rx_tooshort++; goto out; /* XXX */ } if (!(dir == IEEE80211_FC1_DIR_TODS || (dir == IEEE80211_FC1_DIR_DSTODS && (vap->iv_flags & IEEE80211_F_DWDS)))) { if (dir != IEEE80211_FC1_DIR_DSTODS) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "data", "incorrect dir 0x%x", dir); } else { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT | IEEE80211_MSG_WDS, wh, "4-address data", "%s", "DWDS not enabled"); } vap->iv_stats.is_rx_wrongdir++; goto out; } /* check if source STA is associated */ if (ni == vap->iv_bss) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "data", "%s", "unknown src"); ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_DEAUTH, IEEE80211_REASON_NOT_AUTHED); vap->iv_stats.is_rx_notassoc++; goto err; } if (ni->ni_associd == 0) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "data", "%s", "unassoc src"); IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DISASSOC, IEEE80211_REASON_NOT_ASSOCED); vap->iv_stats.is_rx_notassoc++; goto err; } /* * Check for power save state change. * XXX out-of-order A-MPDU frames? */ if (((wh->i_fc[1] & IEEE80211_FC1_PWR_MGT) ^ (ni->ni_flags & IEEE80211_NODE_PWR_MGT))) vap->iv_node_ps(ni, wh->i_fc[1] & IEEE80211_FC1_PWR_MGT); /* * For 4-address packets handle WDS discovery * notifications. Once a WDS link is setup frames * are just delivered to the WDS vap (see below). */ if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap == NULL) { if (!ieee80211_node_is_authorized(ni)) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT | IEEE80211_MSG_WDS, wh, "4-address data", "%s", "unauthorized port"); vap->iv_stats.is_rx_unauth++; IEEE80211_NODE_STAT(ni, rx_unauth); goto err; } ieee80211_dwds_discover(ni, m); return type; } /* * Handle A-MPDU re-ordering. If the frame is to be * processed directly then ieee80211_ampdu_reorder * will return 0; otherwise it has consumed the mbuf * and we should do nothing more with it. */ if ((m->m_flags & M_AMPDU) && ieee80211_ampdu_reorder(ni, m) != 0) { m = NULL; goto out; } resubmit_ampdu: /* * Handle privacy requirements. Note that we * must not be preempted from here until after * we (potentially) call ieee80211_crypto_demic; * otherwise we may violate assumptions in the * crypto cipher modules used to do delayed update * of replay sequence numbers. */ if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { /* * Discard encrypted frames when privacy is off. */ IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "WEP", "%s", "PRIVACY off"); vap->iv_stats.is_rx_noprivacy++; IEEE80211_NODE_STAT(ni, rx_noprivacy); goto out; } key = ieee80211_crypto_decap(ni, m, hdrspace); if (key == NULL) { /* NB: stats+msgs handled in crypto_decap */ IEEE80211_NODE_STAT(ni, rx_wepfail); goto out; } wh = mtod(m, struct ieee80211_frame *); wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; } else { /* XXX M_WEP and IEEE80211_F_PRIVACY */ key = NULL; } /* * Save QoS bits for use below--before we strip the header. */ if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : ((struct ieee80211_qosframe *)wh)->i_qos[0]; } else qos = 0; /* * Next up, any fragmentation. */ if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { m = ieee80211_defrag(ni, m, hdrspace); if (m == NULL) { /* Fragment dropped or frame not complete yet */ goto out; } } wh = NULL; /* no longer valid, catch any uses */ /* * Next strip any MSDU crypto bits. */ if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, ni->ni_macaddr, "data", "%s", "demic error"); vap->iv_stats.is_rx_demicfail++; IEEE80211_NODE_STAT(ni, rx_demicfail); goto out; } /* copy to listener after decrypt */ if (ieee80211_radiotap_active_vap(vap)) ieee80211_radiotap_rx(vap, m); need_tap = 0; /* * Finally, strip the 802.11 header. */ m = ieee80211_decap(vap, m, hdrspace); if (m == NULL) { /* XXX mask bit to check for both */ /* don't count Null data frames as errors */ if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) goto out; IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, ni->ni_macaddr, "data", "%s", "decap error"); vap->iv_stats.is_rx_decap++; IEEE80211_NODE_STAT(ni, rx_decap); goto err; } eh = mtod(m, struct ether_header *); if (!ieee80211_node_is_authorized(ni)) { /* * Deny any non-PAE frames received prior to * authorization. For open/shared-key * authentication the port is mark authorized * after authentication completes. For 802.1x * the port is not marked authorized by the * authenticator until the handshake has completed. */ if (eh->ether_type != htons(ETHERTYPE_PAE)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, eh->ether_shost, "data", "unauthorized port: ether type 0x%x len %u", eh->ether_type, m->m_pkthdr.len); vap->iv_stats.is_rx_unauth++; IEEE80211_NODE_STAT(ni, rx_unauth); goto err; } } else { /* * When denying unencrypted frames, discard * any non-PAE frames received without encryption. */ if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && (key == NULL && (m->m_flags & M_WEP) == 0) && eh->ether_type != htons(ETHERTYPE_PAE)) { /* * Drop unencrypted frames. */ vap->iv_stats.is_rx_unencrypted++; IEEE80211_NODE_STAT(ni, rx_unencrypted); goto out; } } /* XXX require HT? */ if (qos & IEEE80211_QOS_AMSDU) { m = ieee80211_decap_amsdu(ni, m); if (m == NULL) return IEEE80211_FC0_TYPE_DATA; } else { #ifdef IEEE80211_SUPPORT_SUPERG m = ieee80211_decap_fastframe(vap, ni, m); if (m == NULL) return IEEE80211_FC0_TYPE_DATA; #endif } if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap != NULL) ieee80211_deliver_data(ni->ni_wdsvap, ni, m); else hostap_deliver_data(vap, ni, m); return IEEE80211_FC0_TYPE_DATA; case IEEE80211_FC0_TYPE_MGT: vap->iv_stats.is_rx_mgmt++; IEEE80211_NODE_STAT(ni, rx_mgmt); if (dir != IEEE80211_FC1_DIR_NODS) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "mgt", "incorrect dir 0x%x", dir); vap->iv_stats.is_rx_wrongdir++; goto err; } if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, "mgt", "too short: len %u", m->m_pkthdr.len); vap->iv_stats.is_rx_tooshort++; goto out; } if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { /* ensure return frames are unicast */ IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, wh, NULL, "source is multicast: %s", ether_sprintf(wh->i_addr2)); vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ goto out; } #ifdef IEEE80211_DEBUG if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) || ieee80211_msg_dumppkts(vap)) { if_printf(ifp, "received %s from %s rssi %d\n", - ieee80211_mgt_subtype_name[subtype >> - IEEE80211_FC0_SUBTYPE_SHIFT], + ieee80211_mgt_subtype_name(subtype), ether_sprintf(wh->i_addr2), rssi); } #endif if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) { /* * Only shared key auth frames with a challenge * should be encrypted, discard all others. */ IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "WEP set but not permitted"); vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ goto out; } if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { /* * Discard encrypted frames when privacy is off. */ IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "WEP set but PRIVACY off"); vap->iv_stats.is_rx_noprivacy++; goto out; } hdrspace = ieee80211_hdrspace(ic, wh); key = ieee80211_crypto_decap(ni, m, hdrspace); if (key == NULL) { /* NB: stats+msgs handled in crypto_decap */ goto out; } wh = mtod(m, struct ieee80211_frame *); wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; } /* * Pass the packet to radiotap before calling iv_recv_mgmt(). * Otherwise iv_recv_mgmt() might pass another packet to * radiotap, resulting in out of order packet captures. */ if (ieee80211_radiotap_active_vap(vap)) ieee80211_radiotap_rx(vap, m); need_tap = 0; vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); goto out; case IEEE80211_FC0_TYPE_CTL: vap->iv_stats.is_rx_ctl++; IEEE80211_NODE_STAT(ni, rx_ctrl); vap->iv_recv_ctl(ni, m, subtype); goto out; default: IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, wh, "bad", "frame type 0x%x", type); /* should not come here */ break; } err: if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); out: if (m != NULL) { if (need_tap && ieee80211_radiotap_active_vap(vap)) ieee80211_radiotap_rx(vap, m); m_freem(m); } return type; } static void hostap_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh, int rssi, int nf, uint16_t seq, uint16_t status) { struct ieee80211vap *vap = ni->ni_vap; KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state)); if (ni->ni_authmode == IEEE80211_AUTH_SHARED) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, ni->ni_macaddr, "open auth", "bad sta auth mode %u", ni->ni_authmode); vap->iv_stats.is_rx_bad_auth++; /* XXX */ /* * Clear any challenge text that may be there if * a previous shared key auth failed and then an * open auth is attempted. */ if (ni->ni_challenge != NULL) { IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); ni->ni_challenge = NULL; } /* XXX hack to workaround calling convention */ ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_AUTH, (seq + 1) | (IEEE80211_STATUS_ALG<<16)); return; } if (seq != IEEE80211_AUTH_OPEN_REQUEST) { vap->iv_stats.is_rx_bad_auth++; return; } /* always accept open authentication requests */ if (ni == vap->iv_bss) { ni = ieee80211_dup_bss(vap, wh->i_addr2); if (ni == NULL) return; } else if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0) (void) ieee80211_ref_node(ni); /* * Mark the node as referenced to reflect that it's * reference count has been bumped to insure it remains * after the transaction completes. */ ni->ni_flags |= IEEE80211_NODE_AREF; /* * Mark the node as requiring a valid association id * before outbound traffic is permitted. */ ni->ni_flags |= IEEE80211_NODE_ASSOCID; if (vap->iv_acl != NULL && vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) { /* * When the ACL policy is set to RADIUS we defer the * authorization to a user agent. Dispatch an event, * a subsequent MLME call will decide the fate of the * station. If the user agent is not present then the * node will be reclaimed due to inactivity. */ IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, ni->ni_macaddr, "%s", "station authentication defered (radius acl)"); ieee80211_notify_node_auth(ni); } else { IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni->ni_macaddr, "%s", "station authenticated (open)"); /* * When 802.1x is not in use mark the port * authorized at this point so traffic can flow. */ if (ni->ni_authmode != IEEE80211_AUTH_8021X) ieee80211_node_authorize(ni); } } static void hostap_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh, uint8_t *frm, uint8_t *efrm, int rssi, int nf, uint16_t seq, uint16_t status) { struct ieee80211vap *vap = ni->ni_vap; uint8_t *challenge; int allocbs, estatus; KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state)); /* * NB: this can happen as we allow pre-shared key * authentication to be enabled w/o wep being turned * on so that configuration of these can be done * in any order. It may be better to enforce the * ordering in which case this check would just be * for sanity/consistency. */ if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, ni->ni_macaddr, "shared key auth", "%s", " PRIVACY is disabled"); estatus = IEEE80211_STATUS_ALG; goto bad; } /* * Pre-shared key authentication is evil; accept * it only if explicitly configured (it is supported * mainly for compatibility with clients like Mac OS X). */ if (ni->ni_authmode != IEEE80211_AUTH_AUTO && ni->ni_authmode != IEEE80211_AUTH_SHARED) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, ni->ni_macaddr, "shared key auth", "bad sta auth mode %u", ni->ni_authmode); vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */ estatus = IEEE80211_STATUS_ALG; goto bad; } challenge = NULL; if (frm + 1 < efrm) { if ((frm[1] + 2) > (efrm - frm)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, ni->ni_macaddr, "shared key auth", "ie %d/%d too long", frm[0], (frm[1] + 2) - (efrm - frm)); vap->iv_stats.is_rx_bad_auth++; estatus = IEEE80211_STATUS_CHALLENGE; goto bad; } if (*frm == IEEE80211_ELEMID_CHALLENGE) challenge = frm; frm += frm[1] + 2; } switch (seq) { case IEEE80211_AUTH_SHARED_CHALLENGE: case IEEE80211_AUTH_SHARED_RESPONSE: if (challenge == NULL) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, ni->ni_macaddr, "shared key auth", "%s", "no challenge"); vap->iv_stats.is_rx_bad_auth++; estatus = IEEE80211_STATUS_CHALLENGE; goto bad; } if (challenge[1] != IEEE80211_CHALLENGE_LEN) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, ni->ni_macaddr, "shared key auth", "bad challenge len %d", challenge[1]); vap->iv_stats.is_rx_bad_auth++; estatus = IEEE80211_STATUS_CHALLENGE; goto bad; } default: break; } switch (seq) { case IEEE80211_AUTH_SHARED_REQUEST: if (ni == vap->iv_bss) { ni = ieee80211_dup_bss(vap, wh->i_addr2); if (ni == NULL) { /* NB: no way to return an error */ return; } allocbs = 1; } else { if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0) (void) ieee80211_ref_node(ni); allocbs = 0; } /* * Mark the node as referenced to reflect that it's * reference count has been bumped to insure it remains * after the transaction completes. */ ni->ni_flags |= IEEE80211_NODE_AREF; /* * Mark the node as requiring a valid associatio id * before outbound traffic is permitted. */ ni->ni_flags |= IEEE80211_NODE_ASSOCID; IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); ni->ni_noise = nf; if (!ieee80211_alloc_challenge(ni)) { /* NB: don't return error so they rexmit */ return; } get_random_bytes(ni->ni_challenge, IEEE80211_CHALLENGE_LEN); IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni, "shared key %sauth request", allocbs ? "" : "re"); /* * When the ACL policy is set to RADIUS we defer the * authorization to a user agent. Dispatch an event, * a subsequent MLME call will decide the fate of the * station. If the user agent is not present then the * node will be reclaimed due to inactivity. */ if (vap->iv_acl != NULL && vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, ni->ni_macaddr, "%s", "station authentication defered (radius acl)"); ieee80211_notify_node_auth(ni); return; } break; case IEEE80211_AUTH_SHARED_RESPONSE: if (ni == vap->iv_bss) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, ni->ni_macaddr, "shared key response", "%s", "unknown station"); /* NB: don't send a response */ return; } if (ni->ni_challenge == NULL) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, ni->ni_macaddr, "shared key response", "%s", "no challenge recorded"); vap->iv_stats.is_rx_bad_auth++; estatus = IEEE80211_STATUS_CHALLENGE; goto bad; } if (memcmp(ni->ni_challenge, &challenge[2], challenge[1]) != 0) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, ni->ni_macaddr, "shared key response", "%s", "challenge mismatch"); vap->iv_stats.is_rx_auth_fail++; estatus = IEEE80211_STATUS_CHALLENGE; goto bad; } IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni, "%s", "station authenticated (shared key)"); ieee80211_node_authorize(ni); break; default: IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, ni->ni_macaddr, "shared key auth", "bad seq %d", seq); vap->iv_stats.is_rx_bad_auth++; estatus = IEEE80211_STATUS_SEQUENCE; goto bad; } IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); return; bad: /* * Send an error response; but only when operating as an AP. */ /* XXX hack to workaround calling convention */ ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_AUTH, (seq + 1) | (estatus<<16)); } /* * Convert a WPA cipher selector OUI to an internal * cipher algorithm. Where appropriate we also * record any key length. */ static int wpa_cipher(const uint8_t *sel, uint8_t *keylen) { #define WPA_SEL(x) (((x)<<24)|WPA_OUI) uint32_t w = le32dec(sel); switch (w) { case WPA_SEL(WPA_CSE_NULL): return IEEE80211_CIPHER_NONE; case WPA_SEL(WPA_CSE_WEP40): if (keylen) *keylen = 40 / NBBY; return IEEE80211_CIPHER_WEP; case WPA_SEL(WPA_CSE_WEP104): if (keylen) *keylen = 104 / NBBY; return IEEE80211_CIPHER_WEP; case WPA_SEL(WPA_CSE_TKIP): return IEEE80211_CIPHER_TKIP; case WPA_SEL(WPA_CSE_CCMP): return IEEE80211_CIPHER_AES_CCM; } return 32; /* NB: so 1<< is discarded */ #undef WPA_SEL } /* * Convert a WPA key management/authentication algorithm * to an internal code. */ static int wpa_keymgmt(const uint8_t *sel) { #define WPA_SEL(x) (((x)<<24)|WPA_OUI) uint32_t w = le32dec(sel); switch (w) { case WPA_SEL(WPA_ASE_8021X_UNSPEC): return WPA_ASE_8021X_UNSPEC; case WPA_SEL(WPA_ASE_8021X_PSK): return WPA_ASE_8021X_PSK; case WPA_SEL(WPA_ASE_NONE): return WPA_ASE_NONE; } return 0; /* NB: so is discarded */ #undef WPA_SEL } /* * Parse a WPA information element to collect parameters. * Note that we do not validate security parameters; that * is handled by the authenticator; the parsing done here * is just for internal use in making operational decisions. */ static int ieee80211_parse_wpa(struct ieee80211vap *vap, const uint8_t *frm, struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh) { uint8_t len = frm[1]; uint32_t w; int n; /* * Check the length once for fixed parts: OUI, type, * version, mcast cipher, and 2 selector counts. * Other, variable-length data, must be checked separately. */ if ((vap->iv_flags & IEEE80211_F_WPA1) == 0) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, wh, "WPA", "not WPA, flags 0x%x", vap->iv_flags); return IEEE80211_REASON_IE_INVALID; } if (len < 14) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, wh, "WPA", "too short, len %u", len); return IEEE80211_REASON_IE_INVALID; } frm += 6, len -= 4; /* NB: len is payload only */ /* NB: iswpaoui already validated the OUI and type */ w = le16dec(frm); if (w != WPA_VERSION) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, wh, "WPA", "bad version %u", w); return IEEE80211_REASON_IE_INVALID; } frm += 2, len -= 2; memset(rsn, 0, sizeof(*rsn)); /* multicast/group cipher */ rsn->rsn_mcastcipher = wpa_cipher(frm, &rsn->rsn_mcastkeylen); frm += 4, len -= 4; /* unicast ciphers */ n = le16dec(frm); frm += 2, len -= 2; if (len < n*4+2) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, wh, "WPA", "ucast cipher data too short; len %u, n %u", len, n); return IEEE80211_REASON_IE_INVALID; } w = 0; for (; n > 0; n--) { w |= 1<rsn_ucastkeylen); frm += 4, len -= 4; } if (w & (1<rsn_ucastcipher = IEEE80211_CIPHER_TKIP; else rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM; /* key management algorithms */ n = le16dec(frm); frm += 2, len -= 2; if (len < n*4) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, wh, "WPA", "key mgmt alg data too short; len %u, n %u", len, n); return IEEE80211_REASON_IE_INVALID; } w = 0; for (; n > 0; n--) { w |= wpa_keymgmt(frm); frm += 4, len -= 4; } if (w & WPA_ASE_8021X_UNSPEC) rsn->rsn_keymgmt = WPA_ASE_8021X_UNSPEC; else rsn->rsn_keymgmt = WPA_ASE_8021X_PSK; if (len > 2) /* optional capabilities */ rsn->rsn_caps = le16dec(frm); return 0; } /* * Convert an RSN cipher selector OUI to an internal * cipher algorithm. Where appropriate we also * record any key length. */ static int rsn_cipher(const uint8_t *sel, uint8_t *keylen) { #define RSN_SEL(x) (((x)<<24)|RSN_OUI) uint32_t w = le32dec(sel); switch (w) { case RSN_SEL(RSN_CSE_NULL): return IEEE80211_CIPHER_NONE; case RSN_SEL(RSN_CSE_WEP40): if (keylen) *keylen = 40 / NBBY; return IEEE80211_CIPHER_WEP; case RSN_SEL(RSN_CSE_WEP104): if (keylen) *keylen = 104 / NBBY; return IEEE80211_CIPHER_WEP; case RSN_SEL(RSN_CSE_TKIP): return IEEE80211_CIPHER_TKIP; case RSN_SEL(RSN_CSE_CCMP): return IEEE80211_CIPHER_AES_CCM; case RSN_SEL(RSN_CSE_WRAP): return IEEE80211_CIPHER_AES_OCB; } return 32; /* NB: so 1<< is discarded */ #undef WPA_SEL } /* * Convert an RSN key management/authentication algorithm * to an internal code. */ static int rsn_keymgmt(const uint8_t *sel) { #define RSN_SEL(x) (((x)<<24)|RSN_OUI) uint32_t w = le32dec(sel); switch (w) { case RSN_SEL(RSN_ASE_8021X_UNSPEC): return RSN_ASE_8021X_UNSPEC; case RSN_SEL(RSN_ASE_8021X_PSK): return RSN_ASE_8021X_PSK; case RSN_SEL(RSN_ASE_NONE): return RSN_ASE_NONE; } return 0; /* NB: so is discarded */ #undef RSN_SEL } /* * Parse a WPA/RSN information element to collect parameters * and validate the parameters against what has been * configured for the system. */ static int ieee80211_parse_rsn(struct ieee80211vap *vap, const uint8_t *frm, struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh) { uint8_t len = frm[1]; uint32_t w; int n; /* * Check the length once for fixed parts: * version, mcast cipher, and 2 selector counts. * Other, variable-length data, must be checked separately. */ if ((vap->iv_flags & IEEE80211_F_WPA2) == 0) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, wh, "WPA", "not RSN, flags 0x%x", vap->iv_flags); return IEEE80211_REASON_IE_INVALID; } if (len < 10) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, wh, "RSN", "too short, len %u", len); return IEEE80211_REASON_IE_INVALID; } frm += 2; w = le16dec(frm); if (w != RSN_VERSION) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, wh, "RSN", "bad version %u", w); return IEEE80211_REASON_IE_INVALID; } frm += 2, len -= 2; memset(rsn, 0, sizeof(*rsn)); /* multicast/group cipher */ rsn->rsn_mcastcipher = rsn_cipher(frm, &rsn->rsn_mcastkeylen); frm += 4, len -= 4; /* unicast ciphers */ n = le16dec(frm); frm += 2, len -= 2; if (len < n*4+2) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, wh, "RSN", "ucast cipher data too short; len %u, n %u", len, n); return IEEE80211_REASON_IE_INVALID; } w = 0; for (; n > 0; n--) { w |= 1<rsn_ucastkeylen); frm += 4, len -= 4; } if (w & (1<rsn_ucastcipher = IEEE80211_CIPHER_TKIP; else rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM; /* key management algorithms */ n = le16dec(frm); frm += 2, len -= 2; if (len < n*4) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, wh, "RSN", "key mgmt alg data too short; len %u, n %u", len, n); return IEEE80211_REASON_IE_INVALID; } w = 0; for (; n > 0; n--) { w |= rsn_keymgmt(frm); frm += 4, len -= 4; } if (w & RSN_ASE_8021X_UNSPEC) rsn->rsn_keymgmt = RSN_ASE_8021X_UNSPEC; else rsn->rsn_keymgmt = RSN_ASE_8021X_PSK; /* optional RSN capabilities */ if (len > 2) rsn->rsn_caps = le16dec(frm); /* XXXPMKID */ return 0; } /* * WPA/802.11i assocation request processing. */ static int wpa_assocreq(struct ieee80211_node *ni, struct ieee80211_rsnparms *rsnparms, const struct ieee80211_frame *wh, const uint8_t *wpa, const uint8_t *rsn, uint16_t capinfo) { struct ieee80211vap *vap = ni->ni_vap; uint8_t reason; int badwparsn; ni->ni_flags &= ~(IEEE80211_NODE_WPS|IEEE80211_NODE_TSN); if (wpa == NULL && rsn == NULL) { if (vap->iv_flags_ext & IEEE80211_FEXT_WPS) { /* * W-Fi Protected Setup (WPS) permits * clients to associate and pass EAPOL frames * to establish initial credentials. */ ni->ni_flags |= IEEE80211_NODE_WPS; return 1; } if ((vap->iv_flags_ext & IEEE80211_FEXT_TSN) && (capinfo & IEEE80211_CAPINFO_PRIVACY)) { /* * Transitional Security Network. Permits clients * to associate and use WEP while WPA is configured. */ ni->ni_flags |= IEEE80211_NODE_TSN; return 1; } IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, wh, NULL, "%s", "no WPA/RSN IE in association request"); vap->iv_stats.is_rx_assoc_badwpaie++; reason = IEEE80211_REASON_IE_INVALID; goto bad; } /* assert right association security credentials */ badwparsn = 0; /* NB: to silence compiler */ switch (vap->iv_flags & IEEE80211_F_WPA) { case IEEE80211_F_WPA1: badwparsn = (wpa == NULL); break; case IEEE80211_F_WPA2: badwparsn = (rsn == NULL); break; case IEEE80211_F_WPA1|IEEE80211_F_WPA2: badwparsn = (wpa == NULL && rsn == NULL); break; } if (badwparsn) { IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, wh, NULL, "%s", "missing WPA/RSN IE in association request"); vap->iv_stats.is_rx_assoc_badwpaie++; reason = IEEE80211_REASON_IE_INVALID; goto bad; } /* * Parse WPA/RSN information element. */ if (wpa != NULL) reason = ieee80211_parse_wpa(vap, wpa, rsnparms, wh); else reason = ieee80211_parse_rsn(vap, rsn, rsnparms, wh); if (reason != 0) { /* XXX distinguish WPA/RSN? */ vap->iv_stats.is_rx_assoc_badwpaie++; goto bad; } IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, ni, "%s ie: mc %u/%u uc %u/%u key %u caps 0x%x", wpa != NULL ? "WPA" : "RSN", rsnparms->rsn_mcastcipher, rsnparms->rsn_mcastkeylen, rsnparms->rsn_ucastcipher, rsnparms->rsn_ucastkeylen, rsnparms->rsn_keymgmt, rsnparms->rsn_caps); return 1; bad: ieee80211_node_deauth(ni, reason); return 0; } /* XXX find a better place for definition */ struct l2_update_frame { struct ether_header eh; uint8_t dsap; uint8_t ssap; uint8_t control; uint8_t xid[3]; } __packed; /* * Deliver a TGf L2UF frame on behalf of a station. * This primes any bridge when the station is roaming * between ap's on the same wired network. */ static void ieee80211_deliver_l2uf(struct ieee80211_node *ni) { struct ieee80211vap *vap = ni->ni_vap; struct ifnet *ifp = vap->iv_ifp; struct mbuf *m; struct l2_update_frame *l2uf; struct ether_header *eh; m = m_gethdr(M_NOWAIT, MT_DATA); if (m == NULL) { IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, "%s", "no mbuf for l2uf frame"); vap->iv_stats.is_rx_nobuf++; /* XXX not right */ return; } l2uf = mtod(m, struct l2_update_frame *); eh = &l2uf->eh; /* dst: Broadcast address */ IEEE80211_ADDR_COPY(eh->ether_dhost, ifp->if_broadcastaddr); /* src: associated STA */ IEEE80211_ADDR_COPY(eh->ether_shost, ni->ni_macaddr); eh->ether_type = htons(sizeof(*l2uf) - sizeof(*eh)); l2uf->dsap = 0; l2uf->ssap = 0; l2uf->control = 0xf5; l2uf->xid[0] = 0x81; l2uf->xid[1] = 0x80; l2uf->xid[2] = 0x00; m->m_pkthdr.len = m->m_len = sizeof(*l2uf); hostap_deliver_data(vap, ni, m); } static void ratesetmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, int reassoc, int resp, const char *tag, int rate) { IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2, "deny %s request, %s rate set mismatch, rate/MCS %d", reassoc ? "reassoc" : "assoc", tag, rate & IEEE80211_RATE_VAL); IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_BASIC_RATE); ieee80211_node_leave(ni); } static void capinfomismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, int reassoc, int resp, const char *tag, int capinfo) { struct ieee80211vap *vap = ni->ni_vap; IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2, "deny %s request, %s mismatch 0x%x", reassoc ? "reassoc" : "assoc", tag, capinfo); IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_CAPINFO); ieee80211_node_leave(ni); vap->iv_stats.is_rx_assoc_capmismatch++; } static void htcapmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, int reassoc, int resp) { IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2, "deny %s request, %s missing HT ie", reassoc ? "reassoc" : "assoc"); /* XXX no better code */ IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_MISSING_HT_CAPS); ieee80211_node_leave(ni); } static void authalgreject(struct ieee80211_node *ni, const struct ieee80211_frame *wh, int algo, int seq, int status) { struct ieee80211vap *vap = ni->ni_vap; IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, wh, NULL, "unsupported alg %d", algo); vap->iv_stats.is_rx_auth_unsupported++; ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_AUTH, seq | (status << 16)); } static __inline int ishtmixed(const uint8_t *ie) { const struct ieee80211_ie_htinfo *ht = (const struct ieee80211_ie_htinfo *) ie; return (ht->hi_byte2 & IEEE80211_HTINFO_OPMODE) == IEEE80211_HTINFO_OPMODE_MIXED; } static int is11bclient(const uint8_t *rates, const uint8_t *xrates) { static const uint32_t brates = (1<<2*1)|(1<<2*2)|(1<<11)|(1<<2*11); int i; /* NB: the 11b clients we care about will not have xrates */ if (xrates != NULL || rates == NULL) return 0; for (i = 0; i < rates[1]; i++) { int r = rates[2+i] & IEEE80211_RATE_VAL; if (r > 2*11 || ((1<ni_vap; struct ieee80211com *ic = ni->ni_ic; struct ieee80211_frame *wh; uint8_t *frm, *efrm, *sfrm; uint8_t *ssid, *rates, *xrates, *wpa, *rsn, *wme, *ath, *htcap; int reassoc, resp; uint8_t rate; wh = mtod(m0, struct ieee80211_frame *); frm = (uint8_t *)&wh[1]; efrm = mtod(m0, uint8_t *) + m0->m_len; switch (subtype) { case IEEE80211_FC0_SUBTYPE_PROBE_RESP: /* * We process beacon/probe response frames when scanning; * otherwise we check beacon frames for overlapping non-ERP * BSS in 11g and/or overlapping legacy BSS when in HT. */ if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { vap->iv_stats.is_rx_mgtdiscard++; return; } /* FALLTHROUGH */ case IEEE80211_FC0_SUBTYPE_BEACON: { struct ieee80211_scanparams scan; /* NB: accept off-channel frames */ /* XXX TODO: use rxstatus to determine off-channel details */ if (ieee80211_parse_beacon(ni, m0, ic->ic_curchan, &scan) &~ IEEE80211_BPARSE_OFFCHAN) return; /* * Count frame now that we know it's to be processed. */ if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { vap->iv_stats.is_rx_beacon++; /* XXX remove */ IEEE80211_NODE_STAT(ni, rx_beacons); } else IEEE80211_NODE_STAT(ni, rx_proberesp); /* * If scanning, just pass information to the scan module. */ if (ic->ic_flags & IEEE80211_F_SCAN) { if (scan.status == 0 && /* NB: on channel */ (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN)) { /* * Actively scanning a channel marked passive; * send a probe request now that we know there * is 802.11 traffic present. * * XXX check if the beacon we recv'd gives * us what we need and suppress the probe req */ ieee80211_probe_curchan(vap, 1); ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; } ieee80211_add_scan(vap, ic->ic_curchan, &scan, wh, subtype, rssi, nf); return; } /* * Check beacon for overlapping bss w/ non ERP stations. * If we detect one and protection is configured but not * enabled, enable it and start a timer that'll bring us * out if we stop seeing the bss. */ if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && scan.status == 0 && /* NB: on-channel */ ((scan.erp & 0x100) == 0 || /* NB: no ERP, 11b sta*/ (scan.erp & IEEE80211_ERP_NON_ERP_PRESENT))) { ic->ic_lastnonerp = ticks; ic->ic_flags_ext |= IEEE80211_FEXT_NONERP_PR; if (ic->ic_protmode != IEEE80211_PROT_NONE && (ic->ic_flags & IEEE80211_F_USEPROT) == 0) { IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_ASSOC, wh, "non-ERP present on channel %d " "(saw erp 0x%x from channel %d), " "enable use of protection", ic->ic_curchan->ic_ieee, scan.erp, scan.chan); ic->ic_flags |= IEEE80211_F_USEPROT; ieee80211_notify_erp(ic); } } /* * Check beacon for non-HT station on HT channel * and update HT BSS occupancy as appropriate. */ if (IEEE80211_IS_CHAN_HT(ic->ic_curchan)) { if (scan.status & IEEE80211_BPARSE_OFFCHAN) { /* * Off control channel; only check frames * that come in the extension channel when * operating w/ HT40. */ if (!IEEE80211_IS_CHAN_HT40(ic->ic_curchan)) break; if (scan.chan != ic->ic_curchan->ic_extieee) break; } if (scan.htinfo == NULL) { ieee80211_htprot_update(ic, IEEE80211_HTINFO_OPMODE_PROTOPT | IEEE80211_HTINFO_NONHT_PRESENT); } else if (ishtmixed(scan.htinfo)) { /* XXX? take NONHT_PRESENT from beacon? */ ieee80211_htprot_update(ic, IEEE80211_HTINFO_OPMODE_MIXED | IEEE80211_HTINFO_NONHT_PRESENT); } } break; } case IEEE80211_FC0_SUBTYPE_PROBE_REQ: if (vap->iv_state != IEEE80211_S_RUN) { vap->iv_stats.is_rx_mgtdiscard++; return; } /* * Consult the ACL policy module if setup. */ if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, wh, NULL, "%s", "disallowed by ACL"); vap->iv_stats.is_rx_acl++; return; } /* * prreq frame format * [tlv] ssid * [tlv] supported rates * [tlv] extended supported rates */ ssid = rates = xrates = NULL; sfrm = frm; while (efrm - frm > 1) { IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); switch (*frm) { case IEEE80211_ELEMID_SSID: ssid = frm; break; case IEEE80211_ELEMID_RATES: rates = frm; break; case IEEE80211_ELEMID_XRATES: xrates = frm; break; } frm += frm[1] + 2; } IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); if (xrates != NULL) IEEE80211_VERIFY_ELEMENT(xrates, IEEE80211_RATE_MAXSIZE - rates[1], return); IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return); if ((vap->iv_flags & IEEE80211_F_HIDESSID) && ssid[1] == 0) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "no ssid with ssid suppression enabled"); vap->iv_stats.is_rx_ssidmismatch++; /*XXX*/ return; } /* XXX find a better class or define it's own */ IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, "%s", "recv probe req"); /* * Some legacy 11b clients cannot hack a complete * probe response frame. When the request includes * only a bare-bones rate set, communicate this to * the transmit side. */ ieee80211_send_proberesp(vap, wh->i_addr2, is11bclient(rates, xrates) ? IEEE80211_SEND_LEGACY_11B : 0); break; case IEEE80211_FC0_SUBTYPE_AUTH: { uint16_t algo, seq, status; if (vap->iv_state != IEEE80211_S_RUN) { vap->iv_stats.is_rx_mgtdiscard++; return; } if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) { IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, wh, NULL, "%s", "wrong bssid"); vap->iv_stats.is_rx_wrongbss++; /*XXX unique stat?*/ return; } /* * auth frame format * [2] algorithm * [2] sequence * [2] status * [tlv*] challenge */ IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); algo = le16toh(*(uint16_t *)frm); seq = le16toh(*(uint16_t *)(frm + 2)); status = le16toh(*(uint16_t *)(frm + 4)); IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2, "recv auth frame with algorithm %d seq %d", algo, seq); /* * Consult the ACL policy module if setup. */ if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, wh, NULL, "%s", "disallowed by ACL"); vap->iv_stats.is_rx_acl++; ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_AUTH, (seq+1) | (IEEE80211_STATUS_UNSPECIFIED<<16)); return; } if (vap->iv_flags & IEEE80211_F_COUNTERM) { IEEE80211_DISCARD(vap, IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO, wh, NULL, "%s", "TKIP countermeasures enabled"); vap->iv_stats.is_rx_auth_countermeasures++; ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_AUTH, IEEE80211_REASON_MIC_FAILURE); return; } if (algo == IEEE80211_AUTH_ALG_SHARED) hostap_auth_shared(ni, wh, frm + 6, efrm, rssi, nf, seq, status); else if (algo == IEEE80211_AUTH_ALG_OPEN) hostap_auth_open(ni, wh, rssi, nf, seq, status); else if (algo == IEEE80211_AUTH_ALG_LEAP) { authalgreject(ni, wh, algo, seq+1, IEEE80211_STATUS_ALG); return; } else { /* * We assume that an unknown algorithm is the result * of a decryption failure on a shared key auth frame; * return a status code appropriate for that instead * of IEEE80211_STATUS_ALG. * * NB: a seq# of 4 is intentional; the decrypted * frame likely has a bogus seq value. */ authalgreject(ni, wh, algo, 4, IEEE80211_STATUS_CHALLENGE); return; } break; } case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: { uint16_t capinfo, lintval; struct ieee80211_rsnparms rsnparms; if (vap->iv_state != IEEE80211_S_RUN) { vap->iv_stats.is_rx_mgtdiscard++; return; } if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) { IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, wh, NULL, "%s", "wrong bssid"); vap->iv_stats.is_rx_assoc_bss++; return; } if (subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) { reassoc = 1; resp = IEEE80211_FC0_SUBTYPE_REASSOC_RESP; } else { reassoc = 0; resp = IEEE80211_FC0_SUBTYPE_ASSOC_RESP; } if (ni == vap->iv_bss) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2, "deny %s request, sta not authenticated", reassoc ? "reassoc" : "assoc"); ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_DEAUTH, IEEE80211_REASON_ASSOC_NOT_AUTHED); vap->iv_stats.is_rx_assoc_notauth++; return; } /* * asreq frame format * [2] capability information * [2] listen interval * [6*] current AP address (reassoc only) * [tlv] ssid * [tlv] supported rates * [tlv] extended supported rates * [tlv] WPA or RSN * [tlv] HT capabilities * [tlv] Atheros capabilities */ IEEE80211_VERIFY_LENGTH(efrm - frm, (reassoc ? 10 : 4), return); capinfo = le16toh(*(uint16_t *)frm); frm += 2; lintval = le16toh(*(uint16_t *)frm); frm += 2; if (reassoc) frm += 6; /* ignore current AP info */ ssid = rates = xrates = wpa = rsn = wme = ath = htcap = NULL; sfrm = frm; while (efrm - frm > 1) { IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); switch (*frm) { case IEEE80211_ELEMID_SSID: ssid = frm; break; case IEEE80211_ELEMID_RATES: rates = frm; break; case IEEE80211_ELEMID_XRATES: xrates = frm; break; case IEEE80211_ELEMID_RSN: rsn = frm; break; case IEEE80211_ELEMID_HTCAP: htcap = frm; break; case IEEE80211_ELEMID_VENDOR: if (iswpaoui(frm)) wpa = frm; else if (iswmeinfo(frm)) wme = frm; #ifdef IEEE80211_SUPPORT_SUPERG else if (isatherosoui(frm)) ath = frm; #endif else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) { if (ishtcapoui(frm) && htcap == NULL) htcap = frm; } break; } frm += frm[1] + 2; } IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); if (xrates != NULL) IEEE80211_VERIFY_ELEMENT(xrates, IEEE80211_RATE_MAXSIZE - rates[1], return); IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return); if (htcap != NULL) { IEEE80211_VERIFY_LENGTH(htcap[1], htcap[0] == IEEE80211_ELEMID_VENDOR ? 4 + sizeof(struct ieee80211_ie_htcap)-2 : sizeof(struct ieee80211_ie_htcap)-2, return); /* XXX just NULL out? */ } if ((vap->iv_flags & IEEE80211_F_WPA) && !wpa_assocreq(ni, &rsnparms, wh, wpa, rsn, capinfo)) return; /* discard challenge after association */ if (ni->ni_challenge != NULL) { IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); ni->ni_challenge = NULL; } /* NB: 802.11 spec says to ignore station's privacy bit */ if ((capinfo & IEEE80211_CAPINFO_ESS) == 0) { capinfomismatch(ni, wh, reassoc, resp, "capability", capinfo); return; } /* * Disallow re-associate w/ invalid slot time setting. */ if (ni->ni_associd != 0 && IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && ((ni->ni_capinfo ^ capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME)) { capinfomismatch(ni, wh, reassoc, resp, "slot time", capinfo); return; } rate = ieee80211_setup_rates(ni, rates, xrates, IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | IEEE80211_F_DONEGO | IEEE80211_F_DODEL); if (rate & IEEE80211_RATE_BASIC) { ratesetmismatch(ni, wh, reassoc, resp, "legacy", rate); vap->iv_stats.is_rx_assoc_norate++; return; } /* * If constrained to 11g-only stations reject an * 11b-only station. We cheat a bit here by looking * at the max negotiated xmit rate and assuming anyone * with a best rate <24Mb/s is an 11b station. */ if ((vap->iv_flags & IEEE80211_F_PUREG) && rate < 48) { ratesetmismatch(ni, wh, reassoc, resp, "11g", rate); vap->iv_stats.is_rx_assoc_norate++; return; } /* * Do HT rate set handling and setup HT node state. */ ni->ni_chan = vap->iv_bss->ni_chan; if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && htcap != NULL) { rate = ieee80211_setup_htrates(ni, htcap, IEEE80211_F_DOFMCS | IEEE80211_F_DONEGO | IEEE80211_F_DOBRS); if (rate & IEEE80211_RATE_BASIC) { ratesetmismatch(ni, wh, reassoc, resp, "HT", rate); vap->iv_stats.is_ht_assoc_norate++; return; } ieee80211_ht_node_init(ni); ieee80211_ht_updatehtcap(ni, htcap); } else if (ni->ni_flags & IEEE80211_NODE_HT) ieee80211_ht_node_cleanup(ni); #ifdef IEEE80211_SUPPORT_SUPERG /* Always do ff node cleanup; for A-MSDU */ ieee80211_ff_node_cleanup(ni); #endif /* * Allow AMPDU operation only with unencrypted traffic * or AES-CCM; the 11n spec only specifies these ciphers * so permitting any others is undefined and can lead * to interoperability problems. */ if ((ni->ni_flags & IEEE80211_NODE_HT) && (((vap->iv_flags & IEEE80211_F_WPA) && rsnparms.rsn_ucastcipher != IEEE80211_CIPHER_AES_CCM) || (vap->iv_flags & (IEEE80211_F_WPA|IEEE80211_F_PRIVACY)) == IEEE80211_F_PRIVACY)) { IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, "disallow HT use because WEP or TKIP requested, " "capinfo 0x%x ucastcipher %d", capinfo, rsnparms.rsn_ucastcipher); ieee80211_ht_node_cleanup(ni); #ifdef IEEE80211_SUPPORT_SUPERG /* Always do ff node cleanup; for A-MSDU */ ieee80211_ff_node_cleanup(ni); #endif vap->iv_stats.is_ht_assoc_downgrade++; } /* * If constrained to 11n-only stations reject legacy stations. */ if ((vap->iv_flags_ht & IEEE80211_FHT_PUREN) && (ni->ni_flags & IEEE80211_NODE_HT) == 0) { htcapmismatch(ni, wh, reassoc, resp); vap->iv_stats.is_ht_assoc_nohtcap++; return; } IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); ni->ni_noise = nf; ni->ni_intval = lintval; ni->ni_capinfo = capinfo; ni->ni_fhdwell = vap->iv_bss->ni_fhdwell; ni->ni_fhindex = vap->iv_bss->ni_fhindex; /* * Store the IEs. * XXX maybe better to just expand */ if (ieee80211_ies_init(&ni->ni_ies, sfrm, efrm - sfrm)) { #define setie(_ie, _off) ieee80211_ies_setie(ni->ni_ies, _ie, _off) if (wpa != NULL) setie(wpa_ie, wpa - sfrm); if (rsn != NULL) setie(rsn_ie, rsn - sfrm); if (htcap != NULL) setie(htcap_ie, htcap - sfrm); if (wme != NULL) { setie(wme_ie, wme - sfrm); /* * Mark node as capable of QoS. */ ni->ni_flags |= IEEE80211_NODE_QOS; } else ni->ni_flags &= ~IEEE80211_NODE_QOS; #ifdef IEEE80211_SUPPORT_SUPERG if (ath != NULL) { setie(ath_ie, ath - sfrm); /* * Parse ATH station parameters. */ ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); } else #endif ni->ni_ath_flags = 0; #undef setie } else { ni->ni_flags &= ~IEEE80211_NODE_QOS; ni->ni_ath_flags = 0; } ieee80211_node_join(ni, resp); ieee80211_deliver_l2uf(ni); break; } case IEEE80211_FC0_SUBTYPE_DEAUTH: case IEEE80211_FC0_SUBTYPE_DISASSOC: { uint16_t reason; if (vap->iv_state != IEEE80211_S_RUN || /* NB: can happen when in promiscuous mode */ !IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { vap->iv_stats.is_rx_mgtdiscard++; break; } /* * deauth/disassoc frame format * [2] reason */ IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); reason = le16toh(*(uint16_t *)frm); if (subtype == IEEE80211_FC0_SUBTYPE_DEAUTH) { vap->iv_stats.is_rx_deauth++; IEEE80211_NODE_STAT(ni, rx_deauth); } else { vap->iv_stats.is_rx_disassoc++; IEEE80211_NODE_STAT(ni, rx_disassoc); } IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, "recv %s (reason: %d (%s))", - ieee80211_mgt_subtype_name[subtype >> - IEEE80211_FC0_SUBTYPE_SHIFT], + ieee80211_mgt_subtype_name(subtype), reason, ieee80211_reason_to_string(reason)); if (ni != vap->iv_bss) ieee80211_node_leave(ni); break; } case IEEE80211_FC0_SUBTYPE_ACTION: case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: if (ni == vap->iv_bss) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "unknown node"); vap->iv_stats.is_rx_mgtdiscard++; } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && !IEEE80211_IS_MULTICAST(wh->i_addr1)) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "not for us"); vap->iv_stats.is_rx_mgtdiscard++; } else if (vap->iv_state != IEEE80211_S_RUN) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "wrong state %s", ieee80211_state_name[vap->iv_state]); vap->iv_stats.is_rx_mgtdiscard++; } else { if (ieee80211_parse_action(ni, m0) == 0) (void)ic->ic_recv_action(ni, wh, frm, efrm); } break; case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: case IEEE80211_FC0_SUBTYPE_TIMING_ADV: case IEEE80211_FC0_SUBTYPE_ATIM: IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "not handled"); vap->iv_stats.is_rx_mgtdiscard++; break; default: IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, wh, "mgt", "subtype 0x%x not handled", subtype); vap->iv_stats.is_rx_badsubtype++; break; } } static void hostap_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) { switch (subtype) { case IEEE80211_FC0_SUBTYPE_PS_POLL: ni->ni_vap->iv_recv_pspoll(ni, m); break; case IEEE80211_FC0_SUBTYPE_BAR: ieee80211_recv_bar(ni, m); break; } } /* * Process a received ps-poll frame. */ void ieee80211_recv_pspoll(struct ieee80211_node *ni, struct mbuf *m0) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = vap->iv_ic; struct ieee80211_frame_min *wh; struct mbuf *m; uint16_t aid; int qlen; wh = mtod(m0, struct ieee80211_frame_min *); if (ni->ni_associd == 0) { IEEE80211_DISCARD(vap, IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG, (struct ieee80211_frame *) wh, NULL, "%s", "unassociated station"); vap->iv_stats.is_ps_unassoc++; IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, IEEE80211_REASON_NOT_ASSOCED); return; } aid = le16toh(*(uint16_t *)wh->i_dur); if (aid != ni->ni_associd) { IEEE80211_DISCARD(vap, IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG, (struct ieee80211_frame *) wh, NULL, "aid mismatch: sta aid 0x%x poll aid 0x%x", ni->ni_associd, aid); vap->iv_stats.is_ps_badaid++; /* * NB: We used to deauth the station but it turns out * the Blackberry Curve 8230 (and perhaps other devices) * sometimes send the wrong AID when WME is negotiated. * Being more lenient here seems ok as we already check * the station is associated and we only return frames * queued for the station (i.e. we don't use the AID). */ return; } /* Okay, take the first queued packet and put it out... */ m = ieee80211_node_psq_dequeue(ni, &qlen); if (m == NULL) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_POWER, wh->i_addr2, "%s", "recv ps-poll, but queue empty"); ieee80211_send_nulldata(ieee80211_ref_node(ni)); vap->iv_stats.is_ps_qempty++; /* XXX node stat */ if (vap->iv_set_tim != NULL) vap->iv_set_tim(ni, 0); /* just in case */ return; } /* * If there are more packets, set the more packets bit * in the packet dispatched to the station; otherwise * turn off the TIM bit. */ if (qlen != 0) { IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, "recv ps-poll, send packet, %u still queued", qlen); m->m_flags |= M_MORE_DATA; } else { IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, "%s", "recv ps-poll, send packet, queue empty"); if (vap->iv_set_tim != NULL) vap->iv_set_tim(ni, 0); } m->m_flags |= M_PWR_SAV; /* bypass PS handling */ /* * Do the right thing; if it's an encap'ed frame then * call ieee80211_parent_xmitpkt() else * call ieee80211_vap_xmitpkt(). */ if (m->m_flags & M_ENCAP) { (void) ieee80211_parent_xmitpkt(ic, m); } else { (void) ieee80211_vap_xmitpkt(vap, m); } } Index: head/sys/net80211/ieee80211_input.c =================================================================== --- head/sys/net80211/ieee80211_input.c (revision 298375) +++ head/sys/net80211/ieee80211_input.c (revision 298376) @@ -1,981 +1,977 @@ /*- * Copyright (c) 2001 Atsushi Onoe * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); #include "opt_wlan.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef IEEE80211_SUPPORT_MESH #include #endif #include #ifdef INET #include #include #endif static void ieee80211_process_mimo(struct ieee80211_node *ni, struct ieee80211_rx_stats *rx) { int i; /* Verify the required MIMO bits are set */ if ((rx->r_flags & (IEEE80211_R_C_CHAIN | IEEE80211_R_C_NF | IEEE80211_R_C_RSSI)) != (IEEE80211_R_C_CHAIN | IEEE80211_R_C_NF | IEEE80211_R_C_RSSI)) return; /* XXX This assumes the MIMO radios have both ctl and ext chains */ for (i = 0; i < MIN(rx->c_chain, IEEE80211_MAX_CHAINS); i++) { IEEE80211_RSSI_LPF(ni->ni_mimo_rssi_ctl[i], rx->c_rssi_ctl[i]); IEEE80211_RSSI_LPF(ni->ni_mimo_rssi_ext[i], rx->c_rssi_ext[i]); } /* XXX This also assumes the MIMO radios have both ctl and ext chains */ for(i = 0; i < MIN(rx->c_chain, IEEE80211_MAX_CHAINS); i++) { ni->ni_mimo_noise_ctl[i] = rx->c_nf_ctl[i]; ni->ni_mimo_noise_ext[i] = rx->c_nf_ext[i]; } ni->ni_mimo_chains = rx->c_chain; } int ieee80211_input_mimo(struct ieee80211_node *ni, struct mbuf *m, struct ieee80211_rx_stats *rx) { struct ieee80211_rx_stats rxs; if (rx) { memcpy(&rxs, rx, sizeof(*rx)); } else { /* try to read from mbuf */ bzero(&rxs, sizeof(rxs)); ieee80211_get_rx_params(m, &rxs); } /* XXX should assert IEEE80211_R_NF and IEEE80211_R_RSSI are set */ ieee80211_process_mimo(ni, &rxs); //return ieee80211_input(ni, m, rx->rssi, rx->nf); return ni->ni_vap->iv_input(ni, m, &rxs, rxs.rssi, rxs.nf); } int ieee80211_input_all(struct ieee80211com *ic, struct mbuf *m, int rssi, int nf) { struct ieee80211_rx_stats rx; rx.r_flags = IEEE80211_R_NF | IEEE80211_R_RSSI; rx.nf = nf; rx.rssi = rssi; return ieee80211_input_mimo_all(ic, m, &rx); } int ieee80211_input_mimo_all(struct ieee80211com *ic, struct mbuf *m, struct ieee80211_rx_stats *rx) { struct ieee80211_rx_stats rxs; struct ieee80211vap *vap; int type = -1; m->m_flags |= M_BCAST; /* NB: mark for bpf tap'ing */ if (rx) { memcpy(&rxs, rx, sizeof(*rx)); } else { /* try to read from mbuf */ bzero(&rxs, sizeof(rxs)); ieee80211_get_rx_params(m, &rxs); } /* XXX locking */ TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { struct ieee80211_node *ni; struct mbuf *mcopy; /* NB: could check for IFF_UP but this is cheaper */ if (vap->iv_state == IEEE80211_S_INIT) continue; /* * WDS vap's only receive directed traffic from the * station at the ``far end''. That traffic should * be passed through the AP vap the station is associated * to--so don't spam them with mcast frames. */ if (vap->iv_opmode == IEEE80211_M_WDS) continue; if (TAILQ_NEXT(vap, iv_next) != NULL) { /* * Packet contents are changed by ieee80211_decap * so do a deep copy of the packet. */ mcopy = m_dup(m, M_NOWAIT); if (mcopy == NULL) { /* XXX stat+msg */ continue; } } else { mcopy = m; m = NULL; } ni = ieee80211_ref_node(vap->iv_bss); type = ieee80211_input_mimo(ni, mcopy, &rxs); ieee80211_free_node(ni); } if (m != NULL) /* no vaps, reclaim mbuf */ m_freem(m); return type; } /* * This function reassembles fragments. * * XXX should handle 3 concurrent reassemblies per-spec. */ struct mbuf * ieee80211_defrag(struct ieee80211_node *ni, struct mbuf *m, int hdrspace) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); struct ieee80211_frame *lwh; uint16_t rxseq; uint8_t fragno; uint8_t more_frag = wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG; struct mbuf *mfrag; KASSERT(!IEEE80211_IS_MULTICAST(wh->i_addr1), ("multicast fragm?")); rxseq = le16toh(*(uint16_t *)wh->i_seq); fragno = rxseq & IEEE80211_SEQ_FRAG_MASK; /* Quick way out, if there's nothing to defragment */ if (!more_frag && fragno == 0 && ni->ni_rxfrag[0] == NULL) return m; /* * Remove frag to insure it doesn't get reaped by timer. */ if (ni->ni_table == NULL) { /* * Should never happen. If the node is orphaned (not in * the table) then input packets should not reach here. * Otherwise, a concurrent request that yanks the table * should be blocked by other interlocking and/or by first * shutting the driver down. Regardless, be defensive * here and just bail */ /* XXX need msg+stat */ m_freem(m); return NULL; } IEEE80211_NODE_LOCK(ni->ni_table); mfrag = ni->ni_rxfrag[0]; ni->ni_rxfrag[0] = NULL; IEEE80211_NODE_UNLOCK(ni->ni_table); /* * Validate new fragment is in order and * related to the previous ones. */ if (mfrag != NULL) { uint16_t last_rxseq; lwh = mtod(mfrag, struct ieee80211_frame *); last_rxseq = le16toh(*(uint16_t *)lwh->i_seq); /* NB: check seq # and frag together */ if (rxseq != last_rxseq+1 || !IEEE80211_ADDR_EQ(wh->i_addr1, lwh->i_addr1) || !IEEE80211_ADDR_EQ(wh->i_addr2, lwh->i_addr2)) { /* * Unrelated fragment or no space for it, * clear current fragments. */ m_freem(mfrag); mfrag = NULL; } } if (mfrag == NULL) { if (fragno != 0) { /* !first fragment, discard */ vap->iv_stats.is_rx_defrag++; IEEE80211_NODE_STAT(ni, rx_defrag); m_freem(m); return NULL; } mfrag = m; } else { /* concatenate */ m_adj(m, hdrspace); /* strip header */ m_catpkt(mfrag, m); /* track last seqnum and fragno */ lwh = mtod(mfrag, struct ieee80211_frame *); *(uint16_t *) lwh->i_seq = *(uint16_t *) wh->i_seq; } if (more_frag) { /* more to come, save */ ni->ni_rxfragstamp = ticks; ni->ni_rxfrag[0] = mfrag; mfrag = NULL; } return mfrag; } void ieee80211_deliver_data(struct ieee80211vap *vap, struct ieee80211_node *ni, struct mbuf *m) { struct ether_header *eh = mtod(m, struct ether_header *); struct ifnet *ifp = vap->iv_ifp; /* clear driver/net80211 flags before passing up */ m->m_flags &= ~(M_MCAST | M_BCAST); m_clrprotoflags(m); /* NB: see hostap_deliver_data, this path doesn't handle hostap */ KASSERT(vap->iv_opmode != IEEE80211_M_HOSTAP, ("gack, hostap")); /* * Do accounting. */ if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1); IEEE80211_NODE_STAT(ni, rx_data); IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len); if (ETHER_IS_MULTICAST(eh->ether_dhost)) { m->m_flags |= M_MCAST; /* XXX M_BCAST? */ IEEE80211_NODE_STAT(ni, rx_mcast); } else IEEE80211_NODE_STAT(ni, rx_ucast); m->m_pkthdr.rcvif = ifp; if (ni->ni_vlan != 0) { /* attach vlan tag */ m->m_pkthdr.ether_vtag = ni->ni_vlan; m->m_flags |= M_VLANTAG; } ifp->if_input(ifp, m); } struct mbuf * ieee80211_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen) { struct ieee80211_qosframe_addr4 wh; struct ether_header *eh; struct llc *llc; KASSERT(hdrlen <= sizeof(wh), ("hdrlen %d > max %zd", hdrlen, sizeof(wh))); if (m->m_len < hdrlen + sizeof(*llc) && (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { vap->iv_stats.is_rx_tooshort++; /* XXX msg */ return NULL; } memcpy(&wh, mtod(m, caddr_t), hdrlen); llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && /* NB: preserve AppleTalk frames that have a native SNAP hdr */ !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) || llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); llc = NULL; } else { m_adj(m, hdrlen - sizeof(*eh)); } eh = mtod(m, struct ether_header *); switch (wh.i_fc[1] & IEEE80211_FC1_DIR_MASK) { case IEEE80211_FC1_DIR_NODS: IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr1); IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr2); break; case IEEE80211_FC1_DIR_TODS: IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr3); IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr2); break; case IEEE80211_FC1_DIR_FROMDS: IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr1); IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr3); break; case IEEE80211_FC1_DIR_DSTODS: IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr3); IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr4); break; } #ifndef __NO_STRICT_ALIGNMENT if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { m = ieee80211_realign(vap, m, sizeof(*eh)); if (m == NULL) return NULL; } #endif /* !__NO_STRICT_ALIGNMENT */ if (llc != NULL) { eh = mtod(m, struct ether_header *); eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); } return m; } /* * Decap a frame encapsulated in a fast-frame/A-MSDU. */ struct mbuf * ieee80211_decap1(struct mbuf *m, int *framelen) { #define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc)) struct ether_header *eh; struct llc *llc; /* * The frame has an 802.3 header followed by an 802.2 * LLC header. The encapsulated frame length is in the * first header type field; save that and overwrite it * with the true type field found in the second. Then * copy the 802.3 header up to where it belongs and * adjust the mbuf contents to remove the void. */ if (m->m_len < FF_LLC_SIZE && (m = m_pullup(m, FF_LLC_SIZE)) == NULL) return NULL; eh = mtod(m, struct ether_header *); /* 802.3 header is first */ llc = (struct llc *)&eh[1]; /* 802.2 header follows */ *framelen = ntohs(eh->ether_type) /* encap'd frame size */ + sizeof(struct ether_header) - sizeof(struct llc); eh->ether_type = llc->llc_un.type_snap.ether_type; ovbcopy(eh, mtod(m, uint8_t *) + sizeof(struct llc), sizeof(struct ether_header)); m_adj(m, sizeof(struct llc)); return m; #undef FF_LLC_SIZE } /* * Install received rate set information in the node's state block. */ int ieee80211_setup_rates(struct ieee80211_node *ni, const uint8_t *rates, const uint8_t *xrates, int flags) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211_rateset *rs = &ni->ni_rates; memset(rs, 0, sizeof(*rs)); rs->rs_nrates = rates[1]; memcpy(rs->rs_rates, rates + 2, rs->rs_nrates); if (xrates != NULL) { uint8_t nxrates; /* * Tack on 11g extended supported rate element. */ nxrates = xrates[1]; if (rs->rs_nrates + nxrates > IEEE80211_RATE_MAXSIZE) { nxrates = IEEE80211_RATE_MAXSIZE - rs->rs_nrates; IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE, ni, "extended rate set too large; only using " "%u of %u rates", nxrates, xrates[1]); vap->iv_stats.is_rx_rstoobig++; } memcpy(rs->rs_rates + rs->rs_nrates, xrates+2, nxrates); rs->rs_nrates += nxrates; } return ieee80211_fix_rate(ni, rs, flags); } /* * Send a management frame error response to the specified * station. If ni is associated with the station then use * it; otherwise allocate a temporary node suitable for * transmitting the frame and then free the reference so * it will go away as soon as the frame has been transmitted. */ void ieee80211_send_error(struct ieee80211_node *ni, const uint8_t mac[IEEE80211_ADDR_LEN], int subtype, int arg) { struct ieee80211vap *vap = ni->ni_vap; int istmp; if (ni == vap->iv_bss) { if (vap->iv_state != IEEE80211_S_RUN) { /* * XXX hack until we get rid of this routine. * We can be called prior to the vap reaching * run state under certain conditions in which * case iv_bss->ni_chan will not be setup. * Check for this explicitly and and just ignore * the request. */ return; } ni = ieee80211_tmp_node(vap, mac); if (ni == NULL) { /* XXX msg */ return; } istmp = 1; } else istmp = 0; IEEE80211_SEND_MGMT(ni, subtype, arg); if (istmp) ieee80211_free_node(ni); } int ieee80211_alloc_challenge(struct ieee80211_node *ni) { if (ni->ni_challenge == NULL) ni->ni_challenge = (uint32_t *) IEEE80211_MALLOC(IEEE80211_CHALLENGE_LEN, M_80211_NODE, IEEE80211_M_NOWAIT); if (ni->ni_challenge == NULL) { IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni, "%s", "shared key challenge alloc failed"); /* XXX statistic */ } return (ni->ni_challenge != NULL); } /* * Parse a Beacon or ProbeResponse frame and return the * useful information in an ieee80211_scanparams structure. * Status is set to 0 if no problems were found; otherwise * a bitmask of IEEE80211_BPARSE_* items is returned that * describes the problems detected. */ int ieee80211_parse_beacon(struct ieee80211_node *ni, struct mbuf *m, struct ieee80211_channel *rxchan, struct ieee80211_scanparams *scan) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; struct ieee80211_frame *wh; uint8_t *frm, *efrm; wh = mtod(m, struct ieee80211_frame *); frm = (uint8_t *)&wh[1]; efrm = mtod(m, uint8_t *) + m->m_len; scan->status = 0; /* * beacon/probe response frame format * [8] time stamp * [2] beacon interval * [2] capability information * [tlv] ssid * [tlv] supported rates * [tlv] country information * [tlv] channel switch announcement (CSA) * [tlv] parameter set (FH/DS) * [tlv] erp information * [tlv] extended supported rates * [tlv] WME * [tlv] WPA or RSN * [tlv] HT capabilities * [tlv] HT information * [tlv] Atheros capabilities * [tlv] Mesh ID * [tlv] Mesh Configuration */ IEEE80211_VERIFY_LENGTH(efrm - frm, 12, return (scan->status = IEEE80211_BPARSE_BADIELEN)); memset(scan, 0, sizeof(*scan)); scan->tstamp = frm; frm += 8; scan->bintval = le16toh(*(uint16_t *)frm); frm += 2; scan->capinfo = le16toh(*(uint16_t *)frm); frm += 2; scan->bchan = ieee80211_chan2ieee(ic, rxchan); scan->chan = scan->bchan; scan->ies = frm; scan->ies_len = efrm - frm; while (efrm - frm > 1) { IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return (scan->status = IEEE80211_BPARSE_BADIELEN)); switch (*frm) { case IEEE80211_ELEMID_SSID: scan->ssid = frm; break; case IEEE80211_ELEMID_RATES: scan->rates = frm; break; case IEEE80211_ELEMID_COUNTRY: scan->country = frm; break; case IEEE80211_ELEMID_CSA: scan->csa = frm; break; case IEEE80211_ELEMID_QUIET: scan->quiet = frm; break; case IEEE80211_ELEMID_FHPARMS: if (ic->ic_phytype == IEEE80211_T_FH) { scan->fhdwell = le16dec(&frm[2]); scan->chan = IEEE80211_FH_CHAN(frm[4], frm[5]); scan->fhindex = frm[6]; } break; case IEEE80211_ELEMID_DSPARMS: /* * XXX hack this since depending on phytype * is problematic for multi-mode devices. */ if (ic->ic_phytype != IEEE80211_T_FH) scan->chan = frm[2]; break; case IEEE80211_ELEMID_TIM: /* XXX ATIM? */ scan->tim = frm; scan->timoff = frm - mtod(m, uint8_t *); break; case IEEE80211_ELEMID_IBSSPARMS: case IEEE80211_ELEMID_CFPARMS: case IEEE80211_ELEMID_PWRCNSTR: case IEEE80211_ELEMID_BSSLOAD: case IEEE80211_ELEMID_APCHANREP: /* NB: avoid debugging complaints */ break; case IEEE80211_ELEMID_XRATES: scan->xrates = frm; break; case IEEE80211_ELEMID_ERP: if (frm[1] != 1) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID, wh, "ERP", "bad len %u", frm[1]); vap->iv_stats.is_rx_elem_toobig++; break; } scan->erp = frm[2] | 0x100; break; case IEEE80211_ELEMID_HTCAP: scan->htcap = frm; break; case IEEE80211_ELEMID_RSN: scan->rsn = frm; break; case IEEE80211_ELEMID_HTINFO: scan->htinfo = frm; break; #ifdef IEEE80211_SUPPORT_MESH case IEEE80211_ELEMID_MESHID: scan->meshid = frm; break; case IEEE80211_ELEMID_MESHCONF: scan->meshconf = frm; break; #endif /* Extended capabilities; nothing handles it for now */ case IEEE80211_ELEMID_EXTCAP: break; case IEEE80211_ELEMID_VENDOR: if (iswpaoui(frm)) scan->wpa = frm; else if (iswmeparam(frm) || iswmeinfo(frm)) scan->wme = frm; #ifdef IEEE80211_SUPPORT_SUPERG else if (isatherosoui(frm)) scan->ath = frm; #endif #ifdef IEEE80211_SUPPORT_TDMA else if (istdmaoui(frm)) scan->tdma = frm; #endif else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) { /* * Accept pre-draft HT ie's if the * standard ones have not been seen. */ if (ishtcapoui(frm)) { if (scan->htcap == NULL) scan->htcap = frm; } else if (ishtinfooui(frm)) { if (scan->htinfo == NULL) scan->htcap = frm; } } break; default: IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID, wh, "unhandled", "id %u, len %u", *frm, frm[1]); vap->iv_stats.is_rx_elem_unknown++; break; } frm += frm[1] + 2; } IEEE80211_VERIFY_ELEMENT(scan->rates, IEEE80211_RATE_MAXSIZE, scan->status |= IEEE80211_BPARSE_RATES_INVALID); if (scan->rates != NULL && scan->xrates != NULL) { /* * NB: don't process XRATES if RATES is missing. This * avoids a potential null ptr deref and should be ok * as the return code will already note RATES is missing * (so callers shouldn't otherwise process the frame). */ IEEE80211_VERIFY_ELEMENT(scan->xrates, IEEE80211_RATE_MAXSIZE - scan->rates[1], scan->status |= IEEE80211_BPARSE_XRATES_INVALID); } IEEE80211_VERIFY_ELEMENT(scan->ssid, IEEE80211_NWID_LEN, scan->status |= IEEE80211_BPARSE_SSID_INVALID); if (scan->chan != scan->bchan && ic->ic_phytype != IEEE80211_T_FH) { /* * Frame was received on a channel different from the * one indicated in the DS params element id; * silently discard it. * * NB: this can happen due to signal leakage. * But we should take it for FH phy because * the rssi value should be correct even for * different hop pattern in FH. */ IEEE80211_DISCARD(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT, wh, NULL, "for off-channel %u (bchan=%u)", scan->chan, scan->bchan); vap->iv_stats.is_rx_chanmismatch++; scan->status |= IEEE80211_BPARSE_OFFCHAN; } if (!(IEEE80211_BINTVAL_MIN <= scan->bintval && scan->bintval <= IEEE80211_BINTVAL_MAX)) { IEEE80211_DISCARD(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT, wh, NULL, "bogus beacon interval (%d TU)", (int) scan->bintval); vap->iv_stats.is_rx_badbintval++; scan->status |= IEEE80211_BPARSE_BINTVAL_INVALID; } if (scan->country != NULL) { /* * Validate we have at least enough data to extract * the country code. Not sure if we should return an * error instead of discarding the IE; consider this * being lenient as we don't depend on the data for * correct operation. */ IEEE80211_VERIFY_LENGTH(scan->country[1], 3 * sizeof(uint8_t), scan->country = NULL); } if (scan->csa != NULL) { /* * Validate Channel Switch Announcement; this must * be the correct length or we toss the frame. */ IEEE80211_VERIFY_LENGTH(scan->csa[1], 3 * sizeof(uint8_t), scan->status |= IEEE80211_BPARSE_CSA_INVALID); } /* * Process HT ie's. This is complicated by our * accepting both the standard ie's and the pre-draft * vendor OUI ie's that some vendors still use/require. */ if (scan->htcap != NULL) { IEEE80211_VERIFY_LENGTH(scan->htcap[1], scan->htcap[0] == IEEE80211_ELEMID_VENDOR ? 4 + sizeof(struct ieee80211_ie_htcap)-2 : sizeof(struct ieee80211_ie_htcap)-2, scan->htcap = NULL); } if (scan->htinfo != NULL) { IEEE80211_VERIFY_LENGTH(scan->htinfo[1], scan->htinfo[0] == IEEE80211_ELEMID_VENDOR ? 4 + sizeof(struct ieee80211_ie_htinfo)-2 : sizeof(struct ieee80211_ie_htinfo)-2, scan->htinfo = NULL); } return scan->status; } /* * Parse an Action frame. Return 0 on success, non-zero on failure. */ int ieee80211_parse_action(struct ieee80211_node *ni, struct mbuf *m) { struct ieee80211vap *vap = ni->ni_vap; const struct ieee80211_action *ia; struct ieee80211_frame *wh; uint8_t *frm, *efrm; /* * action frame format: * [1] category * [1] action * [tlv] parameters */ wh = mtod(m, struct ieee80211_frame *); frm = (u_int8_t *)&wh[1]; efrm = mtod(m, u_int8_t *) + m->m_len; IEEE80211_VERIFY_LENGTH(efrm - frm, sizeof(struct ieee80211_action), return EINVAL); ia = (const struct ieee80211_action *) frm; vap->iv_stats.is_rx_action++; IEEE80211_NODE_STAT(ni, rx_action); /* verify frame payloads but defer processing */ switch (ia->ia_category) { case IEEE80211_ACTION_CAT_BA: switch (ia->ia_action) { case IEEE80211_ACTION_BA_ADDBA_REQUEST: IEEE80211_VERIFY_LENGTH(efrm - frm, sizeof(struct ieee80211_action_ba_addbarequest), return EINVAL); break; case IEEE80211_ACTION_BA_ADDBA_RESPONSE: IEEE80211_VERIFY_LENGTH(efrm - frm, sizeof(struct ieee80211_action_ba_addbaresponse), return EINVAL); break; case IEEE80211_ACTION_BA_DELBA: IEEE80211_VERIFY_LENGTH(efrm - frm, sizeof(struct ieee80211_action_ba_delba), return EINVAL); break; } break; case IEEE80211_ACTION_CAT_HT: switch (ia->ia_action) { case IEEE80211_ACTION_HT_TXCHWIDTH: IEEE80211_VERIFY_LENGTH(efrm - frm, sizeof(struct ieee80211_action_ht_txchwidth), return EINVAL); break; case IEEE80211_ACTION_HT_MIMOPWRSAVE: IEEE80211_VERIFY_LENGTH(efrm - frm, sizeof(struct ieee80211_action_ht_mimopowersave), return EINVAL); break; } break; #ifdef IEEE80211_SUPPORT_MESH case IEEE80211_ACTION_CAT_MESH: switch (ia->ia_action) { case IEEE80211_ACTION_MESH_LMETRIC: /* * XXX: verification is true only if we are using * Airtime link metric (default) */ IEEE80211_VERIFY_LENGTH(efrm - frm, sizeof(struct ieee80211_meshlmetric_ie), return EINVAL); break; case IEEE80211_ACTION_MESH_HWMP: /* verify something */ break; case IEEE80211_ACTION_MESH_GANN: IEEE80211_VERIFY_LENGTH(efrm - frm, sizeof(struct ieee80211_meshgann_ie), return EINVAL); break; case IEEE80211_ACTION_MESH_CC: case IEEE80211_ACTION_MESH_MCCA_SREQ: case IEEE80211_ACTION_MESH_MCCA_SREP: case IEEE80211_ACTION_MESH_MCCA_AREQ: case IEEE80211_ACTION_MESH_MCCA_ADVER: case IEEE80211_ACTION_MESH_MCCA_TRDOWN: case IEEE80211_ACTION_MESH_TBTT_REQ: case IEEE80211_ACTION_MESH_TBTT_RES: /* reject these early on, not implemented */ IEEE80211_DISCARD(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT, wh, NULL, "not implemented yet, act=0x%02X", ia->ia_action); return EINVAL; } break; case IEEE80211_ACTION_CAT_SELF_PROT: /* If TA or RA group address discard silently */ if (IEEE80211_IS_MULTICAST(wh->i_addr1) || IEEE80211_IS_MULTICAST(wh->i_addr2)) return EINVAL; /* * XXX: Should we verify complete length now or it is * to varying in sizes? */ switch (ia->ia_action) { case IEEE80211_ACTION_MESHPEERING_CONFIRM: case IEEE80211_ACTION_MESHPEERING_CLOSE: /* is not a peering candidate (yet) */ if (ni == vap->iv_bss) return EINVAL; break; } break; #endif } return 0; } #ifdef IEEE80211_DEBUG /* * Debugging support. */ void ieee80211_ssid_mismatch(struct ieee80211vap *vap, const char *tag, uint8_t mac[IEEE80211_ADDR_LEN], uint8_t *ssid) { printf("[%s] discard %s frame, ssid mismatch: ", ether_sprintf(mac), tag); ieee80211_print_essid(ssid + 2, ssid[1]); printf("\n"); } /* * Return the bssid of a frame. */ static const uint8_t * ieee80211_getbssid(const struct ieee80211vap *vap, const struct ieee80211_frame *wh) { if (vap->iv_opmode == IEEE80211_M_STA) return wh->i_addr2; if ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) != IEEE80211_FC1_DIR_NODS) return wh->i_addr1; if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL) return wh->i_addr1; return wh->i_addr3; } #include void ieee80211_note(const struct ieee80211vap *vap, const char *fmt, ...) { char buf[128]; /* XXX */ va_list ap; va_start(ap, fmt); vsnprintf(buf, sizeof(buf), fmt, ap); va_end(ap); if_printf(vap->iv_ifp, "%s", buf); /* NB: no \n */ } void ieee80211_note_frame(const struct ieee80211vap *vap, const struct ieee80211_frame *wh, const char *fmt, ...) { char buf[128]; /* XXX */ va_list ap; va_start(ap, fmt); vsnprintf(buf, sizeof(buf), fmt, ap); va_end(ap); if_printf(vap->iv_ifp, "[%s] %s\n", ether_sprintf(ieee80211_getbssid(vap, wh)), buf); } void ieee80211_note_mac(const struct ieee80211vap *vap, const uint8_t mac[IEEE80211_ADDR_LEN], const char *fmt, ...) { char buf[128]; /* XXX */ va_list ap; va_start(ap, fmt); vsnprintf(buf, sizeof(buf), fmt, ap); va_end(ap); if_printf(vap->iv_ifp, "[%s] %s\n", ether_sprintf(mac), buf); } void ieee80211_discard_frame(const struct ieee80211vap *vap, const struct ieee80211_frame *wh, const char *type, const char *fmt, ...) { va_list ap; if_printf(vap->iv_ifp, "[%s] discard ", ether_sprintf(ieee80211_getbssid(vap, wh))); - if (type == NULL) { - printf("%s frame, ", ieee80211_mgt_subtype_name[ - (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) >> - IEEE80211_FC0_SUBTYPE_SHIFT]); - } else - printf("%s frame, ", type); + printf("%s frame, ", type != NULL ? type : + ieee80211_mgt_subtype_name(wh->i_fc[0])); va_start(ap, fmt); vprintf(fmt, ap); va_end(ap); printf("\n"); } void ieee80211_discard_ie(const struct ieee80211vap *vap, const struct ieee80211_frame *wh, const char *type, const char *fmt, ...) { va_list ap; if_printf(vap->iv_ifp, "[%s] discard ", ether_sprintf(ieee80211_getbssid(vap, wh))); if (type != NULL) printf("%s information element, ", type); else printf("information element, "); va_start(ap, fmt); vprintf(fmt, ap); va_end(ap); printf("\n"); } void ieee80211_discard_mac(const struct ieee80211vap *vap, const uint8_t mac[IEEE80211_ADDR_LEN], const char *type, const char *fmt, ...) { va_list ap; if_printf(vap->iv_ifp, "[%s] discard ", ether_sprintf(mac)); if (type != NULL) printf("%s frame, ", type); else printf("frame, "); va_start(ap, fmt); vprintf(fmt, ap); va_end(ap); printf("\n"); } #endif /* IEEE80211_DEBUG */ Index: head/sys/net80211/ieee80211_input.h =================================================================== --- head/sys/net80211/ieee80211_input.h (revision 298375) +++ head/sys/net80211/ieee80211_input.h (revision 298376) @@ -1,265 +1,264 @@ /*- * Copyright (c) 2007-2009 Sam Leffler, Errno Consulting * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * $FreeBSD$ */ #ifndef _NET80211_IEEE80211_INPUT_H_ #define _NET80211_IEEE80211_INPUT_H_ /* Verify the existence and length of __elem or get out. */ #define IEEE80211_VERIFY_ELEMENT(__elem, __maxlen, _action) do { \ if ((__elem) == NULL) { \ IEEE80211_DISCARD(vap, IEEE80211_MSG_ELEMID, \ wh, NULL, "%s", "no " #__elem ); \ vap->iv_stats.is_rx_elem_missing++; \ _action; \ } else if ((__elem)[1] > (__maxlen)) { \ IEEE80211_DISCARD(vap, IEEE80211_MSG_ELEMID, \ wh, NULL, "bad " #__elem " len %d", (__elem)[1]); \ vap->iv_stats.is_rx_elem_toobig++; \ _action; \ } \ } while (0) #define IEEE80211_VERIFY_LENGTH(_len, _minlen, _action) do { \ if ((_len) < (_minlen)) { \ IEEE80211_DISCARD(vap, IEEE80211_MSG_ELEMID, \ wh, NULL, "ie too short, got %d, expected %d", \ (_len), (_minlen)); \ vap->iv_stats.is_rx_elem_toosmall++; \ _action; \ } \ } while (0) #ifdef IEEE80211_DEBUG void ieee80211_ssid_mismatch(struct ieee80211vap *, const char *tag, uint8_t mac[IEEE80211_ADDR_LEN], uint8_t *ssid); #define IEEE80211_VERIFY_SSID(_ni, _ssid, _action) do { \ if ((_ssid)[1] != 0 && \ ((_ssid)[1] != (_ni)->ni_esslen || \ memcmp((_ssid) + 2, (_ni)->ni_essid, (_ssid)[1]) != 0)) { \ if (ieee80211_msg_input(vap)) \ ieee80211_ssid_mismatch(vap, \ - ieee80211_mgt_subtype_name[subtype >> \ - IEEE80211_FC0_SUBTYPE_SHIFT], \ + ieee80211_mgt_subtype_name(subtype), \ wh->i_addr2, _ssid); \ vap->iv_stats.is_rx_ssidmismatch++; \ _action; \ } \ } while (0) #else /* !IEEE80211_DEBUG */ #define IEEE80211_VERIFY_SSID(_ni, _ssid, _action) do { \ if ((_ssid)[1] != 0 && \ ((_ssid)[1] != (_ni)->ni_esslen || \ memcmp((_ssid) + 2, (_ni)->ni_essid, (_ssid)[1]) != 0)) { \ vap->iv_stats.is_rx_ssidmismatch++; \ _action; \ } \ } while (0) #endif /* !IEEE80211_DEBUG */ #include /* For le16toh() / le32dec() */ static __inline int iswpaoui(const uint8_t *frm) { return frm[1] > 3 && le32dec(frm+2) == ((WPA_OUI_TYPE<<24)|WPA_OUI); } static __inline int iswmeoui(const uint8_t *frm) { return frm[1] > 3 && le32dec(frm+2) == ((WME_OUI_TYPE<<24)|WME_OUI); } static __inline int iswmeparam(const uint8_t *frm) { return frm[1] > 5 && le32dec(frm+2) == ((WME_OUI_TYPE<<24)|WME_OUI) && frm[6] == WME_PARAM_OUI_SUBTYPE; } static __inline int iswmeinfo(const uint8_t *frm) { return frm[1] > 5 && le32dec(frm+2) == ((WME_OUI_TYPE<<24)|WME_OUI) && frm[6] == WME_INFO_OUI_SUBTYPE; } static __inline int isatherosoui(const uint8_t *frm) { return frm[1] > 3 && le32dec(frm+2) == ((ATH_OUI_TYPE<<24)|ATH_OUI); } static __inline int istdmaoui(const uint8_t *frm) { return frm[1] > 3 && le32dec(frm+2) == ((TDMA_OUI_TYPE<<24)|TDMA_OUI); } static __inline int ishtcapoui(const uint8_t *frm) { return frm[1] > 3 && le32dec(frm+2) == ((BCM_OUI_HTCAP<<24)|BCM_OUI); } static __inline int ishtinfooui(const uint8_t *frm) { return frm[1] > 3 && le32dec(frm+2) == ((BCM_OUI_HTINFO<<24)|BCM_OUI); } /* * Check the current frame sequence number against the current TID * state and return whether it's in sequence or should be dropped. * * Since out of order packet and duplicate packet eliminations should * be done by the AMPDU RX code, this routine blindly accepts all * frames from a HT station w/ a TID that is currently doing AMPDU-RX. * HT stations without WME or where the TID is not doing AMPDU-RX * are checked like non-HT stations. * * The routine only eliminates packets whose sequence/fragment * match or are less than the last seen sequence/fragment number * AND are retransmits It doesn't try to eliminate out of order packets. * * Since all frames after sequence number 4095 will be less than 4095 * (as the seqnum wraps), handle that special case so packets aren't * incorrectly dropped - ie, if the next packet is sequence number 0 * but a retransmit since the initial packet didn't make it. */ static __inline int ieee80211_check_rxseq(struct ieee80211_node *ni, struct ieee80211_frame *wh, uint8_t *bssid) { #define SEQ_LEQ(a,b) ((int)((a)-(b)) <= 0) #define SEQ_EQ(a,b) ((int)((a)-(b)) == 0) #define SEQNO(a) ((a) >> IEEE80211_SEQ_SEQ_SHIFT) #define FRAGNO(a) ((a) & IEEE80211_SEQ_FRAG_MASK) struct ieee80211vap *vap = ni->ni_vap; uint16_t rxseq; uint8_t type, subtype; uint8_t tid; struct ieee80211_rx_ampdu *rap; rxseq = le16toh(*(uint16_t *)wh->i_seq); type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; /* * Types with no sequence number (or QoS (+)Null frames) * are always treated valid. */ if (! IEEE80211_HAS_SEQ(type, subtype)) return 1; tid = ieee80211_gettid(wh); /* * Only do the HT AMPDU check for WME stations; non-WME HT stations * shouldn't exist outside of debugging. We should at least * handle that. */ if (tid < WME_NUM_TID) { rap = &ni->ni_rx_ampdu[tid]; /* HT nodes currently doing RX AMPDU are always valid */ if ((ni->ni_flags & IEEE80211_NODE_HT) && (rap->rxa_flags & IEEE80211_AGGR_RUNNING)) goto ok; } /* * Otherwise, retries for packets below or equal to the last * seen sequence number should be dropped. */ /* * Treat frame seqnum 4095 as special due to boundary * wrapping conditions. */ if (SEQNO(ni->ni_rxseqs[tid]) == 4095) { /* * Drop retransmits on seqnum 4095/current fragment for itself. */ if (SEQ_EQ(rxseq, ni->ni_rxseqs[tid]) && (wh->i_fc[1] & IEEE80211_FC1_RETRY)) goto fail; /* * Treat any subsequent frame as fine if the last seen frame * is 4095 and it's not a retransmit for the same sequence * number. However, this doesn't capture incorrectly ordered * fragments w/ sequence number 4095. It shouldn't be seen * in practice, but see the comment above for further info. */ goto ok; } /* * At this point we assume that retransmitted seq/frag numbers below * the current can simply be eliminated. */ if ((wh->i_fc[1] & IEEE80211_FC1_RETRY) && SEQ_LEQ(rxseq, ni->ni_rxseqs[tid])) goto fail; ok: ni->ni_rxseqs[tid] = rxseq; return 1; fail: /* duplicate, discard */ IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, bssid, "duplicate", "seqno <%u,%u> fragno <%u,%u> tid %u", SEQNO(rxseq), SEQNO(ni->ni_rxseqs[tid]), FRAGNO(rxseq), FRAGNO(ni->ni_rxseqs[tid]), tid); vap->iv_stats.is_rx_dup++; IEEE80211_NODE_STAT(ni, rx_dup); return 0; #undef SEQ_LEQ #undef SEQ_EQ #undef SEQNO #undef FRAGNO } void ieee80211_deliver_data(struct ieee80211vap *, struct ieee80211_node *, struct mbuf *); struct mbuf *ieee80211_defrag(struct ieee80211_node *, struct mbuf *, int); struct mbuf *ieee80211_realign(struct ieee80211vap *, struct mbuf *, size_t); struct mbuf *ieee80211_decap(struct ieee80211vap *, struct mbuf *, int); struct mbuf *ieee80211_decap1(struct mbuf *, int *); int ieee80211_setup_rates(struct ieee80211_node *ni, const uint8_t *rates, const uint8_t *xrates, int flags); void ieee80211_send_error(struct ieee80211_node *, const uint8_t mac[IEEE80211_ADDR_LEN], int subtype, int arg); int ieee80211_alloc_challenge(struct ieee80211_node *); int ieee80211_parse_beacon(struct ieee80211_node *, struct mbuf *, struct ieee80211_channel *, struct ieee80211_scanparams *); int ieee80211_parse_action(struct ieee80211_node *, struct mbuf *); #endif /* _NET80211_IEEE80211_INPUT_H_ */ Index: head/sys/net80211/ieee80211_mesh.c =================================================================== --- head/sys/net80211/ieee80211_mesh.c (revision 298375) +++ head/sys/net80211/ieee80211_mesh.c (revision 298376) @@ -1,3619 +1,3618 @@ /*- * Copyright (c) 2009 The FreeBSD Foundation * All rights reserved. * * This software was developed by Rui Paulo under sponsorship from the * FreeBSD Foundation. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #ifdef __FreeBSD__ __FBSDID("$FreeBSD$"); #endif /* * IEEE 802.11s Mesh Point (MBSS) support. * * Based on March 2009, D3.0 802.11s draft spec. */ #include "opt_inet.h" #include "opt_wlan.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef IEEE80211_SUPPORT_SUPERG #include #endif #include #include static void mesh_rt_flush_invalid(struct ieee80211vap *); static int mesh_select_proto_path(struct ieee80211vap *, const char *); static int mesh_select_proto_metric(struct ieee80211vap *, const char *); static void mesh_vattach(struct ieee80211vap *); static int mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int); static void mesh_rt_cleanup_cb(void *); static void mesh_gatemode_setup(struct ieee80211vap *); static void mesh_gatemode_cb(void *); static void mesh_linkchange(struct ieee80211_node *, enum ieee80211_mesh_mlstate); static void mesh_checkid(void *, struct ieee80211_node *); static uint32_t mesh_generateid(struct ieee80211vap *); static int mesh_checkpseq(struct ieee80211vap *, const uint8_t [IEEE80211_ADDR_LEN], uint32_t); static void mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *, struct ieee80211_mesh_route *); static void mesh_forward(struct ieee80211vap *, struct mbuf *, const struct ieee80211_meshcntl *); static int mesh_input(struct ieee80211_node *, struct mbuf *, const struct ieee80211_rx_stats *rxs, int, int); static void mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int, const struct ieee80211_rx_stats *rxs, int, int); static void mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int); static void mesh_peer_timeout_setup(struct ieee80211_node *); static void mesh_peer_timeout_backoff(struct ieee80211_node *); static void mesh_peer_timeout_cb(void *); static __inline void mesh_peer_timeout_stop(struct ieee80211_node *); static int mesh_verify_meshid(struct ieee80211vap *, const uint8_t *); static int mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *); static int mesh_verify_meshpeer(struct ieee80211vap *, uint8_t, const uint8_t *); uint32_t mesh_airtime_calc(struct ieee80211_node *); /* * Timeout values come from the specification and are in milliseconds. */ static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0, "IEEE 802.11s parameters"); static int ieee80211_mesh_gateint = -1; SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, CTLTYPE_INT | CTLFLAG_RW, &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I", "mesh gate interval (ms)"); static int ieee80211_mesh_retrytimeout = -1; SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW, &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I", "Retry timeout (msec)"); static int ieee80211_mesh_holdingtimeout = -1; SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW, &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", "Holding state timeout (msec)"); static int ieee80211_mesh_confirmtimeout = -1; SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW, &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", "Confirm state timeout (msec)"); static int ieee80211_mesh_backofftimeout = -1; SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, CTLTYPE_INT | CTLFLAG_RW, &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I", "Backoff timeout (msec). This is to throutles peering forever when " "not receiving answer or is rejected by a neighbor"); static int ieee80211_mesh_maxretries = 2; SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLFLAG_RW, &ieee80211_mesh_maxretries, 0, "Maximum retries during peer link establishment"); static int ieee80211_mesh_maxholding = 2; SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLFLAG_RW, &ieee80211_mesh_maxholding, 0, "Maximum times we are allowed to transition to HOLDING state before " "backinoff during peer link establishment"); static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; static ieee80211_recv_action_func mesh_recv_action_meshpeering_open; static ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm; static ieee80211_recv_action_func mesh_recv_action_meshpeering_close; static ieee80211_recv_action_func mesh_recv_action_meshlmetric; static ieee80211_recv_action_func mesh_recv_action_meshgate; static ieee80211_send_action_func mesh_send_action_meshpeering_open; static ieee80211_send_action_func mesh_send_action_meshpeering_confirm; static ieee80211_send_action_func mesh_send_action_meshpeering_close; static ieee80211_send_action_func mesh_send_action_meshlmetric; static ieee80211_send_action_func mesh_send_action_meshgate; static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = { .mpm_descr = "AIRTIME", .mpm_ie = IEEE80211_MESHCONF_METRIC_AIRTIME, .mpm_metric = mesh_airtime_calc, }; static struct ieee80211_mesh_proto_path mesh_proto_paths[4]; static struct ieee80211_mesh_proto_metric mesh_proto_metrics[4]; MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame"); MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame"); MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame"); /* The longer one of the lifetime should be stored as new lifetime */ #define MESH_ROUTE_LIFETIME_MAX(a, b) (a > b ? a : b) MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table"); MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table"); /* * Helper functions to manipulate the Mesh routing table. */ static struct ieee80211_mesh_route * mesh_rt_find_locked(struct ieee80211_mesh_state *ms, const uint8_t dest[IEEE80211_ADDR_LEN]) { struct ieee80211_mesh_route *rt; MESH_RT_LOCK_ASSERT(ms); TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { if (IEEE80211_ADDR_EQ(dest, rt->rt_dest)) return rt; } return NULL; } static struct ieee80211_mesh_route * mesh_rt_add_locked(struct ieee80211vap *vap, const uint8_t dest[IEEE80211_ADDR_LEN]) { struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_mesh_route *rt; KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest), ("%s: adding broadcast to the routing table", __func__)); MESH_RT_LOCK_ASSERT(ms); rt = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_route)) + ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); if (rt != NULL) { rt->rt_vap = vap; IEEE80211_ADDR_COPY(rt->rt_dest, dest); rt->rt_priv = (void *)ALIGN(&rt[1]); MESH_RT_ENTRY_LOCK_INIT(rt, "MBSS_RT"); callout_init(&rt->rt_discovery, 1); rt->rt_updtime = ticks; /* create time */ TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next); } return rt; } struct ieee80211_mesh_route * ieee80211_mesh_rt_find(struct ieee80211vap *vap, const uint8_t dest[IEEE80211_ADDR_LEN]) { struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_mesh_route *rt; MESH_RT_LOCK(ms); rt = mesh_rt_find_locked(ms, dest); MESH_RT_UNLOCK(ms); return rt; } struct ieee80211_mesh_route * ieee80211_mesh_rt_add(struct ieee80211vap *vap, const uint8_t dest[IEEE80211_ADDR_LEN]) { struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_mesh_route *rt; KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL, ("%s: duplicate entry in the routing table", __func__)); KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest), ("%s: adding self to the routing table", __func__)); MESH_RT_LOCK(ms); rt = mesh_rt_add_locked(vap, dest); MESH_RT_UNLOCK(ms); return rt; } /* * Update the route lifetime and returns the updated lifetime. * If new_lifetime is zero and route is timedout it will be invalidated. * new_lifetime is in msec */ int ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime) { int timesince, now; uint32_t lifetime = 0; KASSERT(rt != NULL, ("route is NULL")); now = ticks; MESH_RT_ENTRY_LOCK(rt); /* dont clobber a proxy entry gated by us */ if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) { MESH_RT_ENTRY_UNLOCK(rt); return rt->rt_lifetime; } timesince = ticks_to_msecs(now - rt->rt_updtime); rt->rt_updtime = now; if (timesince >= rt->rt_lifetime) { if (new_lifetime != 0) { rt->rt_lifetime = new_lifetime; } else { rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID; rt->rt_lifetime = 0; } } else { /* update what is left of lifetime */ rt->rt_lifetime = rt->rt_lifetime - timesince; rt->rt_lifetime = MESH_ROUTE_LIFETIME_MAX( new_lifetime, rt->rt_lifetime); } lifetime = rt->rt_lifetime; MESH_RT_ENTRY_UNLOCK(rt); return lifetime; } /* * Add a proxy route (as needed) for the specified destination. */ void ieee80211_mesh_proxy_check(struct ieee80211vap *vap, const uint8_t dest[IEEE80211_ADDR_LEN]) { struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_mesh_route *rt; MESH_RT_LOCK(ms); rt = mesh_rt_find_locked(ms, dest); if (rt == NULL) { rt = mesh_rt_add_locked(vap, dest); if (rt == NULL) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, "%s", "unable to add proxy entry"); vap->iv_stats.is_mesh_rtaddfailed++; } else { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, "%s", "add proxy entry"); IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr); IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID | IEEE80211_MESHRT_FLAGS_PROXY; } } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY, ("no proxy flag for poxy entry")); struct ieee80211com *ic = vap->iv_ic; /* * Fix existing entry created by received frames from * stations that have some memory of dest. We also * flush any frames held on the staging queue; delivering * them is too much trouble right now. */ IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, "%s", "fix proxy entry"); IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID | IEEE80211_MESHRT_FLAGS_PROXY; /* XXX belongs in hwmp */ ieee80211_ageq_drain_node(&ic->ic_stageq, (void *)(uintptr_t) ieee80211_mac_hash(ic, dest)); /* XXX stat? */ } MESH_RT_UNLOCK(ms); } static __inline void mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt) { TAILQ_REMOVE(&ms->ms_routes, rt, rt_next); /* * Grab the lock before destroying it, to be sure no one else * is holding the route. */ MESH_RT_ENTRY_LOCK(rt); callout_drain(&rt->rt_discovery); MESH_RT_ENTRY_LOCK_DESTROY(rt); IEEE80211_FREE(rt, M_80211_MESH_RT); } void ieee80211_mesh_rt_del(struct ieee80211vap *vap, const uint8_t dest[IEEE80211_ADDR_LEN]) { struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_mesh_route *rt, *next; MESH_RT_LOCK(ms); TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) { if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { ms->ms_ppath->mpp_senderror(vap, dest, rt, IEEE80211_REASON_MESH_PERR_NO_PROXY); } else { ms->ms_ppath->mpp_senderror(vap, dest, rt, IEEE80211_REASON_MESH_PERR_DEST_UNREACH); } mesh_rt_del(ms, rt); MESH_RT_UNLOCK(ms); return; } } MESH_RT_UNLOCK(ms); } void ieee80211_mesh_rt_flush(struct ieee80211vap *vap) { struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_mesh_route *rt, *next; if (ms == NULL) return; MESH_RT_LOCK(ms); TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) mesh_rt_del(ms, rt); MESH_RT_UNLOCK(ms); } void ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap, const uint8_t peer[IEEE80211_ADDR_LEN]) { struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_mesh_route *rt, *next; MESH_RT_LOCK(ms); TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer)) mesh_rt_del(ms, rt); } MESH_RT_UNLOCK(ms); } /* * Flush expired routing entries, i.e. those in invalid state for * some time. */ static void mesh_rt_flush_invalid(struct ieee80211vap *vap) { struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_mesh_route *rt, *next; if (ms == NULL) return; MESH_RT_LOCK(ms); TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { /* Discover paths will be deleted by their own callout */ if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER) continue; ieee80211_mesh_rt_update(rt, 0); if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) mesh_rt_del(ms, rt); } MESH_RT_UNLOCK(ms); } int ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp) { int i, firstempty = -1; for (i = 0; i < nitems(mesh_proto_paths); i++) { if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr, IEEE80211_MESH_PROTO_DSZ) == 0) return EEXIST; if (!mesh_proto_paths[i].mpp_active && firstempty == -1) firstempty = i; } if (firstempty < 0) return ENOSPC; memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp)); mesh_proto_paths[firstempty].mpp_active = 1; return 0; } int ieee80211_mesh_register_proto_metric(const struct ieee80211_mesh_proto_metric *mpm) { int i, firstempty = -1; for (i = 0; i < nitems(mesh_proto_metrics); i++) { if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr, IEEE80211_MESH_PROTO_DSZ) == 0) return EEXIST; if (!mesh_proto_metrics[i].mpm_active && firstempty == -1) firstempty = i; } if (firstempty < 0) return ENOSPC; memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm)); mesh_proto_metrics[firstempty].mpm_active = 1; return 0; } static int mesh_select_proto_path(struct ieee80211vap *vap, const char *name) { struct ieee80211_mesh_state *ms = vap->iv_mesh; int i; for (i = 0; i < nitems(mesh_proto_paths); i++) { if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) { ms->ms_ppath = &mesh_proto_paths[i]; return 0; } } return ENOENT; } static int mesh_select_proto_metric(struct ieee80211vap *vap, const char *name) { struct ieee80211_mesh_state *ms = vap->iv_mesh; int i; for (i = 0; i < nitems(mesh_proto_metrics); i++) { if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) { ms->ms_pmetric = &mesh_proto_metrics[i]; return 0; } } return ENOENT; } static void mesh_gatemode_setup(struct ieee80211vap *vap) { struct ieee80211_mesh_state *ms = vap->iv_mesh; /* * NB: When a mesh gate is running as a ROOT it shall * not send out periodic GANNs but instead mark the * mesh gate flag for the corresponding proactive PREQ * and RANN frames. */ if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT || (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) { callout_drain(&ms->ms_gatetimer); return ; } callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint, mesh_gatemode_cb, vap); } static void mesh_gatemode_cb(void *arg) { struct ieee80211vap *vap = (struct ieee80211vap *)arg; struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_meshgann_ie gann; gann.gann_flags = 0; /* Reserved */ gann.gann_hopcount = 0; gann.gann_ttl = ms->ms_ttl; IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr); gann.gann_seq = ms->ms_gateseq++; gann.gann_interval = ieee80211_mesh_gateint; IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss, "send broadcast GANN (seq %u)", gann.gann_seq); ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, IEEE80211_ACTION_MESH_GANN, &gann); mesh_gatemode_setup(vap); } static void ieee80211_mesh_init(void) { memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths)); memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics)); /* * Setup mesh parameters that depends on the clock frequency. */ ieee80211_mesh_gateint = msecs_to_ticks(10000); ieee80211_mesh_retrytimeout = msecs_to_ticks(40); ieee80211_mesh_holdingtimeout = msecs_to_ticks(40); ieee80211_mesh_confirmtimeout = msecs_to_ticks(40); ieee80211_mesh_backofftimeout = msecs_to_ticks(5000); /* * Register action frame handlers. */ ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_OPEN, mesh_recv_action_meshpeering_open); ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CONFIRM, mesh_recv_action_meshpeering_confirm); ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CLOSE, mesh_recv_action_meshpeering_close); ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric); ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate); ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_OPEN, mesh_send_action_meshpeering_open); ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CONFIRM, mesh_send_action_meshpeering_confirm); ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CLOSE, mesh_send_action_meshpeering_close); ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, IEEE80211_ACTION_MESH_LMETRIC, mesh_send_action_meshlmetric); ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, IEEE80211_ACTION_MESH_GANN, mesh_send_action_meshgate); /* * Register Airtime Link Metric. */ ieee80211_mesh_register_proto_metric(&mesh_metric_airtime); } SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL); void ieee80211_mesh_attach(struct ieee80211com *ic) { ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach; } void ieee80211_mesh_detach(struct ieee80211com *ic) { } static void mesh_vdetach_peers(void *arg, struct ieee80211_node *ni) { struct ieee80211com *ic = ni->ni_ic; uint16_t args[3]; if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) { args[0] = ni->ni_mlpid; args[1] = ni->ni_mllid; args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CLOSE, args); } callout_drain(&ni->ni_mltimer); /* XXX belongs in hwmp */ ieee80211_ageq_drain_node(&ic->ic_stageq, (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); } static void mesh_vdetach(struct ieee80211vap *vap) { struct ieee80211_mesh_state *ms = vap->iv_mesh; callout_drain(&ms->ms_cleantimer); ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers, NULL); ieee80211_mesh_rt_flush(vap); MESH_RT_LOCK_DESTROY(ms); ms->ms_ppath->mpp_vdetach(vap); IEEE80211_FREE(vap->iv_mesh, M_80211_VAP); vap->iv_mesh = NULL; } static void mesh_vattach(struct ieee80211vap *vap) { struct ieee80211_mesh_state *ms; vap->iv_newstate = mesh_newstate; vap->iv_input = mesh_input; vap->iv_opdetach = mesh_vdetach; vap->iv_recv_mgmt = mesh_recv_mgmt; vap->iv_recv_ctl = mesh_recv_ctl; ms = IEEE80211_MALLOC(sizeof(struct ieee80211_mesh_state), M_80211_VAP, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); if (ms == NULL) { printf("%s: couldn't alloc MBSS state\n", __func__); return; } vap->iv_mesh = ms; ms->ms_seq = 0; ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD); ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL; TAILQ_INIT(&ms->ms_known_gates); TAILQ_INIT(&ms->ms_routes); MESH_RT_LOCK_INIT(ms, "MBSS"); callout_init(&ms->ms_cleantimer, 1); callout_init(&ms->ms_gatetimer, 1); ms->ms_gateseq = 0; mesh_select_proto_metric(vap, "AIRTIME"); KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL")); mesh_select_proto_path(vap, "HWMP"); KASSERT(ms->ms_ppath, ("ms_ppath == NULL")); ms->ms_ppath->mpp_vattach(vap); } /* * IEEE80211_M_MBSS vap state machine handler. */ static int mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) { struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211com *ic = vap->iv_ic; struct ieee80211_node *ni; enum ieee80211_state ostate; IEEE80211_LOCK_ASSERT(ic); ostate = vap->iv_state; IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", __func__, ieee80211_state_name[ostate], ieee80211_state_name[nstate], arg); vap->iv_state = nstate; /* state transition */ if (ostate != IEEE80211_S_SCAN) ieee80211_cancel_scan(vap); /* background scan */ ni = vap->iv_bss; /* NB: no reference held */ if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) { callout_drain(&ms->ms_cleantimer); callout_drain(&ms->ms_gatetimer); } switch (nstate) { case IEEE80211_S_INIT: switch (ostate) { case IEEE80211_S_SCAN: ieee80211_cancel_scan(vap); break; case IEEE80211_S_CAC: ieee80211_dfs_cac_stop(vap); break; case IEEE80211_S_RUN: ieee80211_iterate_nodes(&ic->ic_sta, mesh_vdetach_peers, NULL); break; default: break; } if (ostate != IEEE80211_S_INIT) { /* NB: optimize INIT -> INIT case */ ieee80211_reset_bss(vap); ieee80211_mesh_rt_flush(vap); } break; case IEEE80211_S_SCAN: switch (ostate) { case IEEE80211_S_INIT: if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) && ms->ms_idlen != 0) { /* * Already have a channel and a mesh ID; bypass * the scan and startup immediately. */ ieee80211_create_ibss(vap, vap->iv_des_chan); break; } /* * Initiate a scan. We can come here as a result * of an IEEE80211_IOC_SCAN_REQ too in which case * the vap will be marked with IEEE80211_FEXT_SCANREQ * and the scan request parameters will be present * in iv_scanreq. Otherwise we do the default. */ if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { ieee80211_check_scan(vap, vap->iv_scanreq_flags, vap->iv_scanreq_duration, vap->iv_scanreq_mindwell, vap->iv_scanreq_maxdwell, vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; } else ieee80211_check_scan_current(vap); break; default: break; } break; case IEEE80211_S_CAC: /* * Start CAC on a DFS channel. We come here when starting * a bss on a DFS channel (see ieee80211_create_ibss). */ ieee80211_dfs_cac_start(vap); break; case IEEE80211_S_RUN: switch (ostate) { case IEEE80211_S_INIT: /* * Already have a channel; bypass the * scan and startup immediately. * Note that ieee80211_create_ibss will call * back to do a RUN->RUN state change. */ ieee80211_create_ibss(vap, ieee80211_ht_adjust_channel(ic, ic->ic_curchan, vap->iv_flags_ht)); /* NB: iv_bss is changed on return */ break; case IEEE80211_S_CAC: /* * NB: This is the normal state change when CAC * expires and no radar was detected; no need to * clear the CAC timer as it's already expired. */ /* fall thru... */ case IEEE80211_S_CSA: #if 0 /* * Shorten inactivity timer of associated stations * to weed out sta's that don't follow a CSA. */ ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); #endif /* * Update bss node channel to reflect where * we landed after CSA. */ ieee80211_node_set_chan(vap->iv_bss, ieee80211_ht_adjust_channel(ic, ic->ic_curchan, ieee80211_htchanflags(vap->iv_bss->ni_chan))); /* XXX bypass debug msgs */ break; case IEEE80211_S_SCAN: case IEEE80211_S_RUN: #ifdef IEEE80211_DEBUG if (ieee80211_msg_debug(vap)) { struct ieee80211_node *ni = vap->iv_bss; ieee80211_note(vap, "synchronized with %s meshid ", ether_sprintf(ni->ni_meshid)); ieee80211_print_essid(ni->ni_meshid, ni->ni_meshidlen); /* XXX MCS/HT */ printf(" channel %d\n", ieee80211_chan2ieee(ic, ic->ic_curchan)); } #endif break; default: break; } ieee80211_node_authorize(vap->iv_bss); callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, mesh_rt_cleanup_cb, vap); mesh_gatemode_setup(vap); break; default: break; } /* NB: ostate not nstate */ ms->ms_ppath->mpp_newstate(vap, ostate, arg); return 0; } static void mesh_rt_cleanup_cb(void *arg) { struct ieee80211vap *vap = arg; struct ieee80211_mesh_state *ms = vap->iv_mesh; mesh_rt_flush_invalid(vap); callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, mesh_rt_cleanup_cb, vap); } /* * Mark a mesh STA as gate and return a pointer to it. * If this is first time, we create a new gate route. * Always update the path route to this mesh gate. */ struct ieee80211_mesh_gate_route * ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr, struct ieee80211_mesh_route *rt) { struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_mesh_gate_route *gr = NULL, *next; int found = 0; MESH_RT_LOCK(ms); TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) { found = 1; break; } } if (!found) { /* New mesh gate add it to known table. */ IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr, "%s", "stored new gate information from pro-PREQ."); gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), M_80211_MESH_GT_RT, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); IEEE80211_ADDR_COPY(gr->gr_addr, addr); TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); } gr->gr_route = rt; /* TODO: link from path route to gate route */ MESH_RT_UNLOCK(ms); return gr; } /* * Helper function to note the Mesh Peer Link FSM change. */ static void mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211_mesh_state *ms = vap->iv_mesh; #ifdef IEEE80211_DEBUG static const char *meshlinkstates[] = { [IEEE80211_NODE_MESH_IDLE] = "IDLE", [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT", [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED", [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED", [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED", [IEEE80211_NODE_MESH_HOLDING] = "HOLDING" }; #endif IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, ni, "peer link: %s -> %s", meshlinkstates[ni->ni_mlstate], meshlinkstates[state]); /* track neighbor count */ if (state == IEEE80211_NODE_MESH_ESTABLISHED && ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow")); ms->ms_neighbors++; ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED && state != IEEE80211_NODE_MESH_ESTABLISHED) { KASSERT(ms->ms_neighbors > 0, ("neighbor count 0")); ms->ms_neighbors--; ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); } ni->ni_mlstate = state; switch (state) { case IEEE80211_NODE_MESH_HOLDING: ms->ms_ppath->mpp_peerdown(ni); break; case IEEE80211_NODE_MESH_ESTABLISHED: ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL); break; default: break; } } /* * Helper function to generate a unique local ID required for mesh * peer establishment. */ static void mesh_checkid(void *arg, struct ieee80211_node *ni) { uint16_t *r = arg; if (*r == ni->ni_mllid) *(uint16_t *)arg = 0; } static uint32_t mesh_generateid(struct ieee80211vap *vap) { int maxiter = 4; uint16_t r; do { get_random_bytes(&r, 2); ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r); maxiter--; } while (r == 0 && maxiter > 0); return r; } /* * Verifies if we already received this packet by checking its * sequence number. * Returns 0 if the frame is to be accepted, 1 otherwise. */ static int mesh_checkpseq(struct ieee80211vap *vap, const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq) { struct ieee80211_mesh_route *rt; rt = ieee80211_mesh_rt_find(vap, source); if (rt == NULL) { rt = ieee80211_mesh_rt_add(vap, source); if (rt == NULL) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, "%s", "add mcast route failed"); vap->iv_stats.is_mesh_rtaddfailed++; return 1; } IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, "add mcast route, mesh seqno %d", seq); rt->rt_lastmseq = seq; return 0; } if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) { return 1; } else { rt->rt_lastmseq = seq; return 0; } } /* * Iterate the routing table and locate the next hop. */ struct ieee80211_node * ieee80211_mesh_find_txnode(struct ieee80211vap *vap, const uint8_t dest[IEEE80211_ADDR_LEN]) { struct ieee80211_mesh_route *rt; rt = ieee80211_mesh_rt_find(vap, dest); if (rt == NULL) return NULL; if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, "%s: !valid, flags 0x%x", __func__, rt->rt_flags); /* XXX stat */ return NULL; } if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate); if (rt == NULL) return NULL; if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, "%s: meshgate !valid, flags 0x%x", __func__, rt->rt_flags); /* XXX stat */ return NULL; } } return ieee80211_find_txnode(vap, rt->rt_nexthop); } static void mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m, struct ieee80211_mesh_route *rt_gate) { struct ifnet *ifp = vap->iv_ifp; struct ieee80211_node *ni; IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest); if (ni == NULL) { if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); m_freem(m); return; } /* * Send through the VAP packet transmit path. * This consumes the node ref grabbed above and * the mbuf, regardless of whether there's a problem * or not. */ (void) ieee80211_vap_pkt_send_dest(vap, m, ni); } /* * Forward the queued frames to known valid mesh gates. * Assume destination to be outside the MBSS (i.e. proxy entry), * If no valid mesh gates are known silently discard queued frames. * After transmitting frames to all known valid mesh gates, this route * will be marked invalid, and a new path discovery will happen in the hopes * that (at least) one of the mesh gates have a new proxy entry for us to use. */ void ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap, struct ieee80211_mesh_route *rt_dest) { struct ieee80211com *ic = vap->iv_ic; struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_mesh_route *rt_gate; struct ieee80211_mesh_gate_route *gr = NULL, *gr_next; struct mbuf *m, *mcopy, *next; IEEE80211_TX_UNLOCK_ASSERT(ic); KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER, ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER")); /* XXX: send to more than one valid mash gate */ MESH_RT_LOCK(ms); m = ieee80211_ageq_remove(&ic->ic_stageq, (struct ieee80211_node *)(uintptr_t) ieee80211_mac_hash(ic, rt_dest->rt_dest)); TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) { rt_gate = gr->gr_route; if (rt_gate == NULL) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, rt_dest->rt_dest, "mesh gate with no path %6D", gr->gr_addr, ":"); continue; } if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) continue; KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE, ("route not marked as a mesh gate")); KASSERT((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0, ("found mesh gate that is also marked porxy")); /* * convert route to a proxy route gated by the current * mesh gate, this is needed so encap can built data * frame with correct address. */ rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY | IEEE80211_MESHRT_FLAGS_VALID; rt_dest->rt_ext_seq = 1; /* random value */ IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest); IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop); rt_dest->rt_metric = rt_gate->rt_metric; rt_dest->rt_nhops = rt_gate->rt_nhops; ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact); MESH_RT_UNLOCK(ms); /* XXX: lock?? */ mcopy = m_dup(m, M_NOWAIT); for (; mcopy != NULL; mcopy = next) { next = mcopy->m_nextpkt; mcopy->m_nextpkt = NULL; IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, rt_dest->rt_dest, "flush queued frame %p len %d", mcopy, mcopy->m_pkthdr.len); mesh_transmit_to_gate(vap, mcopy, rt_gate); } MESH_RT_LOCK(ms); } rt_dest->rt_flags = 0; /* Mark invalid */ m_freem(m); MESH_RT_UNLOCK(ms); } /* * Forward the specified frame. * Decrement the TTL and set TA to our MAC address. */ static void mesh_forward(struct ieee80211vap *vap, struct mbuf *m, const struct ieee80211_meshcntl *mc) { struct ieee80211com *ic = vap->iv_ic; struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ifnet *ifp = vap->iv_ifp; const struct ieee80211_frame *wh = mtod(m, const struct ieee80211_frame *); struct mbuf *mcopy; struct ieee80211_meshcntl *mccopy; struct ieee80211_frame *whcopy; struct ieee80211_node *ni; int err; /* This is called from the RX path - don't hold this lock */ IEEE80211_TX_UNLOCK_ASSERT(ic); /* * mesh ttl of 1 means we are the last one receving it, * according to amendment we decrement and then check if * 0, if so we dont forward. */ if (mc->mc_ttl < 1) { IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, "%s", "frame not fwd'd, ttl 1"); vap->iv_stats.is_mesh_fwd_ttl++; return; } if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, "%s", "frame not fwd'd, fwding disabled"); vap->iv_stats.is_mesh_fwd_disabled++; return; } mcopy = m_dup(m, M_NOWAIT); if (mcopy == NULL) { IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, "%s", "frame not fwd'd, cannot dup"); vap->iv_stats.is_mesh_fwd_nobuf++; if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); return; } mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + sizeof(struct ieee80211_meshcntl)); if (mcopy == NULL) { IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, "%s", "frame not fwd'd, too short"); vap->iv_stats.is_mesh_fwd_tooshort++; if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); m_freem(mcopy); return; } whcopy = mtod(mcopy, struct ieee80211_frame *); mccopy = (struct ieee80211_meshcntl *) (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); /* XXX clear other bits? */ whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { ni = ieee80211_ref_node(vap->iv_bss); mcopy->m_flags |= M_MCAST; } else { ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3); if (ni == NULL) { /* * [Optional] any of the following three actions: * o silently discard * o trigger a path discovery * o inform TA that meshDA is unknown. */ IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, "%s", "frame not fwd'd, no path"); ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL, IEEE80211_REASON_MESH_PERR_NO_FI); vap->iv_stats.is_mesh_fwd_nopath++; m_freem(mcopy); return; } IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); } KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); mccopy->mc_ttl--; /* XXX calculate priority so drivers can find the tx queue */ M_WME_SETAC(mcopy, WME_AC_BE); /* XXX do we know m_nextpkt is NULL? */ mcopy->m_pkthdr.rcvif = (void *) ni; /* * XXX this bypasses all of the VAP TX handling; it passes frames * directly to the parent interface. * * Because of this, there's no TX lock being held as there's no * encaps state being used. * * Doing a direct parent transmit may not be the correct thing * to do here; we'll have to re-think this soon. */ IEEE80211_TX_LOCK(ic); err = ieee80211_parent_xmitpkt(ic, mcopy); IEEE80211_TX_UNLOCK(ic); if (!err) if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); } static struct mbuf * mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen) { #define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) uint8_t b[sizeof(struct ieee80211_qosframe_addr4) + sizeof(struct ieee80211_meshcntl_ae10)]; const struct ieee80211_qosframe_addr4 *wh; const struct ieee80211_meshcntl_ae10 *mc; struct ether_header *eh; struct llc *llc; int ae; if (m->m_len < hdrlen + sizeof(*llc) && (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, "discard data frame: %s", "m_pullup failed"); vap->iv_stats.is_rx_tooshort++; return NULL; } memcpy(b, mtod(m, caddr_t), hdrlen); wh = (const struct ieee80211_qosframe_addr4 *)&b[0]; mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen]; KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS || WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS, ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && /* NB: preserve AppleTalk frames that have a native SNAP hdr */ !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) || llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); llc = NULL; } else { m_adj(m, hdrlen - sizeof(*eh)); } eh = mtod(m, struct ether_header *); ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) { IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1); if (ae == IEEE80211_MESH_AE_00) { IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3); } else if (ae == IEEE80211_MESH_AE_01) { IEEE80211_ADDR_COPY(eh->ether_shost, MC01(mc)->mc_addr4); } else { IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, (const struct ieee80211_frame *)wh, NULL, "bad AE %d", ae); vap->iv_stats.is_mesh_badae++; m_freem(m); return NULL; } } else { if (ae == IEEE80211_MESH_AE_00) { IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3); IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4); } else if (ae == IEEE80211_MESH_AE_10) { IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5); IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6); } else { IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, (const struct ieee80211_frame *)wh, NULL, "bad AE %d", ae); vap->iv_stats.is_mesh_badae++; m_freem(m); return NULL; } } #ifndef __NO_STRICT_ALIGNMENT if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { m = ieee80211_realign(vap, m, sizeof(*eh)); if (m == NULL) return NULL; } #endif /* !__NO_STRICT_ALIGNMENT */ if (llc != NULL) { eh = mtod(m, struct ether_header *); eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); } return m; #undef WDIR #undef MC01 } /* * Return non-zero if the unicast mesh data frame should be processed * locally. Frames that are not proxy'd have our address, otherwise * we need to consult the routing table to look for a proxy entry. */ static __inline int mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) { int ae = mc->mc_flags & 3; KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS, ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae)); if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */ const struct ieee80211_meshcntl_ae10 *mc10 = (const struct ieee80211_meshcntl_ae10 *) mc; struct ieee80211_mesh_route *rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5); /* check for proxy route to ourself */ return (rt != NULL && (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)); } else /* ucast w/o proxy */ return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); } /* * Verifies transmitter, updates lifetime, precursor list and forwards data. * > 0 means we have forwarded data and no need to process locally * == 0 means we want to process locally (and we may have forwarded data * < 0 means there was an error and data should be discarded */ static int mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m, struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) { struct ieee80211_qosframe_addr4 *qwh; struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_mesh_route *rt_meshda, *rt_meshsa; /* This is called from the RX path - don't hold this lock */ IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); qwh = (struct ieee80211_qosframe_addr4 *)wh; /* * TODO: * o verify addr2 is a legitimate transmitter * o lifetime of precursor of addr3 (addr2) is max(init, curr) * o lifetime of precursor of addr4 (nexthop) is max(init, curr) */ /* set lifetime of addr3 (meshDA) to initial value */ rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3); if (rt_meshda == NULL) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2, "no route to meshDA(%6D)", qwh->i_addr3, ":"); /* * [Optional] any of the following three actions: * o silently discard [X] * o trigger a path discovery [ ] * o inform TA that meshDA is unknown. [ ] */ /* XXX: stats */ return (-1); } ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs( ms->ms_ppath->mpp_inact)); /* set lifetime of addr4 (meshSA) to initial value */ rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4); KASSERT(rt_meshsa != NULL, ("no route")); ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs( ms->ms_ppath->mpp_inact)); mesh_forward(vap, m, mc); return (1); /* dont process locally */ } /* * Verifies transmitter, updates lifetime, precursor list and process data * locally, if data is proxy with AE = 10 it could mean data should go * on another mesh path or data should be forwarded to the DS. * * > 0 means we have forwarded data and no need to process locally * == 0 means we want to process locally (and we may have forwarded data * < 0 means there was an error and data should be discarded */ static int mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m, struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) { struct ieee80211_qosframe_addr4 *qwh; const struct ieee80211_meshcntl_ae10 *mc10; struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_mesh_route *rt; int ae; /* This is called from the RX path - don't hold this lock */ IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); qwh = (struct ieee80211_qosframe_addr4 *)wh; mc10 = (const struct ieee80211_meshcntl_ae10 *)mc; /* * TODO: * o verify addr2 is a legitimate transmitter * o lifetime of precursor entry is max(init, curr) */ /* set lifetime of addr4 (meshSA) to initial value */ rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4); KASSERT(rt != NULL, ("no route")); ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact)); rt = NULL; ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK; KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae)); if (ae == IEEE80211_MESH_AE_10) { if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) { return (0); /* process locally */ } rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5); if (rt != NULL && (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) && (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) { /* * Forward on another mesh-path, according to * amendment as specified in 9.32.4.1 */ IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5); mesh_forward(vap, m, (const struct ieee80211_meshcntl *)mc10); return (1); /* dont process locally */ } /* * All other cases: forward of MSDUs from the MBSS to DS indiv. * addressed according to 13.11.3.2. */ IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2, "forward frame to DS, SA(%6D) DA(%6D)", mc10->mc_addr6, ":", mc10->mc_addr5, ":"); } return (0); /* process locally */ } /* * Try to forward the group addressed data on to other mesh STAs, and * also to the DS. * * > 0 means we have forwarded data and no need to process locally * == 0 means we want to process locally (and we may have forwarded data * < 0 means there was an error and data should be discarded */ static int mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m, struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) { #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) struct ieee80211_mesh_state *ms = vap->iv_mesh; /* This is called from the RX path - don't hold this lock */ IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); mesh_forward(vap, m, mc); if(mc->mc_ttl > 0) { if (mc->mc_flags & IEEE80211_MESH_AE_01) { /* * Forward of MSDUs from the MBSS to DS group addressed * (according to 13.11.3.2) * This happens by delivering the packet, and a bridge * will sent it on another port member. */ if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE && ms->ms_flags & IEEE80211_MESHFLAGS_FWD) IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, MC01(mc)->mc_addr4, "%s", "forward from MBSS to the DS"); } } return (0); /* process locally */ #undef MC01 } static int mesh_input(struct ieee80211_node *ni, struct mbuf *m, const struct ieee80211_rx_stats *rxs, int rssi, int nf) { #define HAS_SEQ(type) ((type & 0x4) == 0) #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) #define MC10(mc) ((const struct ieee80211_meshcntl_ae10 *)mc) struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; struct ifnet *ifp = vap->iv_ifp; struct ieee80211_frame *wh; const struct ieee80211_meshcntl *mc; int hdrspace, meshdrlen, need_tap, error; uint8_t dir, type, subtype, ae; uint32_t seq; const uint8_t *addr; uint8_t qos[2]; KASSERT(ni != NULL, ("null node")); ni->ni_inact = ni->ni_inact_reload; need_tap = 1; /* mbuf need to be tapped. */ type = -1; /* undefined */ /* This is called from the RX path - don't hold this lock */ IEEE80211_TX_UNLOCK_ASSERT(ic); if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, "too short (1): len %u", m->m_pkthdr.len); vap->iv_stats.is_rx_tooshort++; goto out; } /* * Bit of a cheat here, we use a pointer for a 3-address * frame format but don't reference fields past outside * ieee80211_frame_min w/o first validating the data is * present. */ wh = mtod(m, struct ieee80211_frame *); if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != IEEE80211_FC0_VERSION_0) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); vap->iv_stats.is_rx_badversion++; goto err; } dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); ni->ni_noise = nf; if (HAS_SEQ(type)) { uint8_t tid = ieee80211_gettid(wh); if (IEEE80211_QOS_HAS_SEQ(wh) && TID_TO_WME_AC(tid) >= WME_AC_VI) ic->ic_wme.wme_hipri_traffic++; if (! ieee80211_check_rxseq(ni, wh, wh->i_addr1)) goto out; } } #ifdef IEEE80211_DEBUG /* * It's easier, but too expensive, to simulate different mesh * topologies by consulting the ACL policy very early, so do this * only under DEBUG. * * NB: this check is also done upon peering link initiation. */ if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, wh, NULL, "%s", "disallowed by ACL"); vap->iv_stats.is_rx_acl++; goto out; } #endif switch (type) { case IEEE80211_FC0_TYPE_DATA: if (ni == vap->iv_bss) goto out; if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, NULL, "peer link not yet established (%d)", ni->ni_mlstate); vap->iv_stats.is_mesh_nolink++; goto out; } if (dir != IEEE80211_FC1_DIR_FROMDS && dir != IEEE80211_FC1_DIR_DSTODS) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "data", "incorrect dir 0x%x", dir); vap->iv_stats.is_rx_wrongdir++; goto err; } /* All Mesh data frames are QoS subtype */ if (!HAS_SEQ(type)) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "data", "incorrect subtype 0x%x", subtype); vap->iv_stats.is_rx_badsubtype++; goto err; } /* * Next up, any fragmentation. * XXX: we defrag before we even try to forward, * Mesh Control field is not present in sub-sequent * fragmented frames. This is in contrast to Draft 4.0. */ hdrspace = ieee80211_hdrspace(ic, wh); if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { m = ieee80211_defrag(ni, m, hdrspace); if (m == NULL) { /* Fragment dropped or frame not complete yet */ goto out; } } wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */ /* * Now we have a complete Mesh Data frame. */ /* * Only fromDStoDS data frames use 4 address qos frames * as specified in amendment. Otherwise addr4 is located * in the Mesh Control field and a 3 address qos frame * is used. */ if (IEEE80211_IS_DSTODS(wh)) *(uint16_t *)qos = *(uint16_t *) ((struct ieee80211_qosframe_addr4 *)wh)->i_qos; else *(uint16_t *)qos = *(uint16_t *) ((struct ieee80211_qosframe *)wh)->i_qos; /* * NB: The mesh STA sets the Mesh Control Present * subfield to 1 in the Mesh Data frame containing * an unfragmented MSDU, an A-MSDU, or the first * fragment of an MSDU. * After defrag it should always be present. */ if (!(qos[1] & IEEE80211_QOS_MC)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, NULL, "%s", "Mesh control field not present"); vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */ goto err; } /* pull up enough to get to the mesh control */ if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && (m = m_pullup(m, hdrspace + sizeof(struct ieee80211_meshcntl))) == NULL) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, "data too short: expecting %u", hdrspace); vap->iv_stats.is_rx_tooshort++; goto out; /* XXX */ } /* * Now calculate the full extent of the headers. Note * mesh_decap will pull up anything we didn't get * above when it strips the 802.11 headers. */ mc = (const struct ieee80211_meshcntl *) (mtod(m, const uint8_t *) + hdrspace); ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; meshdrlen = sizeof(struct ieee80211_meshcntl) + ae * IEEE80211_ADDR_LEN; hdrspace += meshdrlen; /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */ if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) && (m->m_len < hdrspace) && ((m = m_pullup(m, hdrspace)) == NULL)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, "data too short: expecting %u", hdrspace); vap->iv_stats.is_rx_tooshort++; goto out; /* XXX */ } /* XXX: are we sure there is no reallocating after m_pullup? */ seq = le32dec(mc->mc_seq); if (IEEE80211_IS_MULTICAST(wh->i_addr1)) addr = wh->i_addr3; else if (ae == IEEE80211_MESH_AE_01) addr = MC01(mc)->mc_addr4; else addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, addr, "data", "%s", "not to me"); vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ goto out; } if (mesh_checkpseq(vap, addr, seq) != 0) { vap->iv_stats.is_rx_dup++; goto out; } /* This code "routes" the frame to the right control path */ if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3)) error = mesh_recv_indiv_data_to_me(vap, m, wh, mc); else if (IEEE80211_IS_MULTICAST(wh->i_addr3)) error = mesh_recv_group_data(vap, m, wh, mc); else error = mesh_recv_indiv_data_to_fwrd(vap, m, wh, mc); } else error = mesh_recv_group_data(vap, m, wh, mc); if (error < 0) goto err; else if (error > 0) goto out; if (ieee80211_radiotap_active_vap(vap)) ieee80211_radiotap_rx(vap, m); need_tap = 0; /* * Finally, strip the 802.11 header. */ m = mesh_decap(vap, m, hdrspace, meshdrlen); if (m == NULL) { /* XXX mask bit to check for both */ /* don't count Null data frames as errors */ if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) goto out; IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, ni->ni_macaddr, "data", "%s", "decap error"); vap->iv_stats.is_rx_decap++; IEEE80211_NODE_STAT(ni, rx_decap); goto err; } if (qos[0] & IEEE80211_QOS_AMSDU) { m = ieee80211_decap_amsdu(ni, m); if (m == NULL) return IEEE80211_FC0_TYPE_DATA; } ieee80211_deliver_data(vap, ni, m); return type; case IEEE80211_FC0_TYPE_MGT: vap->iv_stats.is_rx_mgmt++; IEEE80211_NODE_STAT(ni, rx_mgmt); if (dir != IEEE80211_FC1_DIR_NODS) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "mgt", "incorrect dir 0x%x", dir); vap->iv_stats.is_rx_wrongdir++; goto err; } if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, "mgt", "too short: len %u", m->m_pkthdr.len); vap->iv_stats.is_rx_tooshort++; goto out; } #ifdef IEEE80211_DEBUG if ((ieee80211_msg_debug(vap) && (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || ieee80211_msg_dumppkts(vap)) { if_printf(ifp, "received %s from %s rssi %d\n", - ieee80211_mgt_subtype_name[subtype >> - IEEE80211_FC0_SUBTYPE_SHIFT], + ieee80211_mgt_subtype_name(subtype), ether_sprintf(wh->i_addr2), rssi); } #endif if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "WEP set but not permitted"); vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ goto out; } vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); goto out; case IEEE80211_FC0_TYPE_CTL: vap->iv_stats.is_rx_ctl++; IEEE80211_NODE_STAT(ni, rx_ctrl); goto out; default: IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, wh, "bad", "frame type 0x%x", type); /* should not come here */ break; } err: if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); out: if (m != NULL) { if (need_tap && ieee80211_radiotap_active_vap(vap)) ieee80211_radiotap_rx(vap, m); m_freem(m); } return type; #undef HAS_SEQ #undef MC01 #undef MC10 } static void mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, const struct ieee80211_rx_stats *rxs, int rssi, int nf) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211com *ic = ni->ni_ic; struct ieee80211_channel *rxchan = ic->ic_curchan; struct ieee80211_frame *wh; struct ieee80211_mesh_route *rt; uint8_t *frm, *efrm; wh = mtod(m0, struct ieee80211_frame *); frm = (uint8_t *)&wh[1]; efrm = mtod(m0, uint8_t *) + m0->m_len; switch (subtype) { case IEEE80211_FC0_SUBTYPE_PROBE_RESP: case IEEE80211_FC0_SUBTYPE_BEACON: { struct ieee80211_scanparams scan; struct ieee80211_channel *c; /* * We process beacon/probe response * frames to discover neighbors. */ if (rxs != NULL) { c = ieee80211_lookup_channel_rxstatus(vap, rxs); if (c != NULL) rxchan = c; } if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0) return; /* * Count frame now that we know it's to be processed. */ if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { vap->iv_stats.is_rx_beacon++; /* XXX remove */ IEEE80211_NODE_STAT(ni, rx_beacons); } else IEEE80211_NODE_STAT(ni, rx_proberesp); /* * If scanning, just pass information to the scan module. */ if (ic->ic_flags & IEEE80211_F_SCAN) { if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { /* * Actively scanning a channel marked passive; * send a probe request now that we know there * is 802.11 traffic present. * * XXX check if the beacon we recv'd gives * us what we need and suppress the probe req */ ieee80211_probe_curchan(vap, 1); ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; } ieee80211_add_scan(vap, rxchan, &scan, wh, subtype, rssi, nf); return; } /* The rest of this code assumes we are running */ if (vap->iv_state != IEEE80211_S_RUN) return; /* * Ignore non-mesh STAs. */ if ((scan.capinfo & (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || scan.meshid == NULL || scan.meshconf == NULL) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "beacon", "%s", "not a mesh sta"); vap->iv_stats.is_mesh_wrongmesh++; return; } /* * Ignore STAs for other mesh networks. */ if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || mesh_verify_meshconf(vap, scan.meshconf)) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "beacon", "%s", "not for our mesh"); vap->iv_stats.is_mesh_wrongmesh++; return; } /* * Peer only based on the current ACL policy. */ if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, wh, NULL, "%s", "disallowed by ACL"); vap->iv_stats.is_rx_acl++; return; } /* * Do neighbor discovery. */ if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { /* * Create a new entry in the neighbor table. */ ni = ieee80211_add_neighbor(vap, wh, &scan); } /* * Automatically peer with discovered nodes if possible. */ if (ni != vap->iv_bss && (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) { switch (ni->ni_mlstate) { case IEEE80211_NODE_MESH_IDLE: { uint16_t args[1]; /* Wait for backoff callout to reset counter */ if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) return; ni->ni_mlpid = mesh_generateid(vap); if (ni->ni_mlpid == 0) return; mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); args[0] = ni->ni_mlpid; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_OPEN, args); ni->ni_mlrcnt = 0; mesh_peer_timeout_setup(ni); break; } case IEEE80211_NODE_MESH_ESTABLISHED: { /* * Valid beacon from a peer mesh STA * bump TA lifetime */ rt = ieee80211_mesh_rt_find(vap, wh->i_addr2); if(rt != NULL) { ieee80211_mesh_rt_update(rt, ticks_to_msecs( ms->ms_ppath->mpp_inact)); } break; } default: break; /* ignore */ } } break; } case IEEE80211_FC0_SUBTYPE_PROBE_REQ: { uint8_t *ssid, *meshid, *rates, *xrates; uint8_t *sfrm; if (vap->iv_state != IEEE80211_S_RUN) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "wrong state %s", ieee80211_state_name[vap->iv_state]); vap->iv_stats.is_rx_mgtdiscard++; return; } if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { /* frame must be directed */ IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "not unicast"); vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ return; } /* * prreq frame format * [tlv] ssid * [tlv] supported rates * [tlv] extended supported rates * [tlv] mesh id */ ssid = meshid = rates = xrates = NULL; sfrm = frm; while (efrm - frm > 1) { IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); switch (*frm) { case IEEE80211_ELEMID_SSID: ssid = frm; break; case IEEE80211_ELEMID_RATES: rates = frm; break; case IEEE80211_ELEMID_XRATES: xrates = frm; break; case IEEE80211_ELEMID_MESHID: meshid = frm; break; } frm += frm[1] + 2; } IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); if (xrates != NULL) IEEE80211_VERIFY_ELEMENT(xrates, IEEE80211_RATE_MAXSIZE - rates[1], return); if (meshid != NULL) { IEEE80211_VERIFY_ELEMENT(meshid, IEEE80211_MESHID_LEN, return); /* NB: meshid, not ssid */ IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); } /* XXX find a better class or define it's own */ IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, "%s", "recv probe req"); /* * Some legacy 11b clients cannot hack a complete * probe response frame. When the request includes * only a bare-bones rate set, communicate this to * the transmit side. */ ieee80211_send_proberesp(vap, wh->i_addr2, 0); break; } case IEEE80211_FC0_SUBTYPE_ACTION: case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: if (ni == vap->iv_bss) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "unknown node"); vap->iv_stats.is_rx_mgtdiscard++; } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && !IEEE80211_IS_MULTICAST(wh->i_addr1)) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "not for us"); vap->iv_stats.is_rx_mgtdiscard++; } else if (vap->iv_state != IEEE80211_S_RUN) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "wrong state %s", ieee80211_state_name[vap->iv_state]); vap->iv_stats.is_rx_mgtdiscard++; } else { if (ieee80211_parse_action(ni, m0) == 0) (void)ic->ic_recv_action(ni, wh, frm, efrm); } break; case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: case IEEE80211_FC0_SUBTYPE_TIMING_ADV: case IEEE80211_FC0_SUBTYPE_ATIM: case IEEE80211_FC0_SUBTYPE_DISASSOC: case IEEE80211_FC0_SUBTYPE_AUTH: case IEEE80211_FC0_SUBTYPE_DEAUTH: IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "not handled"); vap->iv_stats.is_rx_mgtdiscard++; break; default: IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, wh, "mgt", "subtype 0x%x not handled", subtype); vap->iv_stats.is_rx_badsubtype++; break; } } static void mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) { switch (subtype) { case IEEE80211_FC0_SUBTYPE_BAR: ieee80211_recv_bar(ni, m); break; } } /* * Parse meshpeering action ie's for MPM frames */ static const struct ieee80211_meshpeer_ie * mesh_parse_meshpeering_action(struct ieee80211_node *ni, const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ const uint8_t *frm, const uint8_t *efrm, struct ieee80211_meshpeer_ie *mp, uint8_t subtype) { struct ieee80211vap *vap = ni->ni_vap; const struct ieee80211_meshpeer_ie *mpie; uint16_t args[3]; const uint8_t *meshid, *meshconf, *meshpeer; uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */ meshid = meshconf = meshpeer = NULL; while (efrm - frm > 1) { IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); switch (*frm) { case IEEE80211_ELEMID_MESHID: meshid = frm; break; case IEEE80211_ELEMID_MESHCONF: meshconf = frm; break; case IEEE80211_ELEMID_MESHPEER: meshpeer = frm; mpie = (const struct ieee80211_meshpeer_ie *) frm; memset(mp, 0, sizeof(*mp)); mp->peer_len = mpie->peer_len; mp->peer_proto = le16dec(&mpie->peer_proto); mp->peer_llinkid = le16dec(&mpie->peer_llinkid); switch (subtype) { case IEEE80211_ACTION_MESHPEERING_CONFIRM: mp->peer_linkid = le16dec(&mpie->peer_linkid); break; case IEEE80211_ACTION_MESHPEERING_CLOSE: /* NB: peer link ID is optional */ if (mpie->peer_len == (IEEE80211_MPM_BASE_SZ + 2)) { mp->peer_linkid = 0; mp->peer_rcode = le16dec(&mpie->peer_linkid); } else { mp->peer_linkid = le16dec(&mpie->peer_linkid); mp->peer_rcode = le16dec(&mpie->peer_rcode); } break; } break; } frm += frm[1] + 2; } /* * Verify the contents of the frame. * If it fails validation, close the peer link. */ if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) { sendclose = 1; IEEE80211_DISCARD(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, wh, NULL, "%s", "MPM validation failed"); } /* If meshid is not the same reject any frames type. */ if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) { sendclose = 1; IEEE80211_DISCARD(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, wh, NULL, "%s", "not for our mesh"); if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) { /* * Standard not clear about this, if we dont ignore * there will be an endless loop between nodes sending * CLOSE frames between each other with wrong meshid. * Discard and timers will bring FSM to IDLE state. */ return NULL; } } /* * Close frames are accepted if meshid is the same. * Verify the other two types. */ if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE && mesh_verify_meshconf(vap, meshconf)) { sendclose = 1; IEEE80211_DISCARD(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, wh, NULL, "%s", "configuration missmatch"); } if (sendclose) { vap->iv_stats.is_rx_mgtdiscard++; switch (ni->ni_mlstate) { case IEEE80211_NODE_MESH_IDLE: case IEEE80211_NODE_MESH_ESTABLISHED: case IEEE80211_NODE_MESH_HOLDING: /* ignore */ break; case IEEE80211_NODE_MESH_OPENSNT: case IEEE80211_NODE_MESH_OPENRCV: case IEEE80211_NODE_MESH_CONFIRMRCV: args[0] = ni->ni_mlpid; args[1] = ni->ni_mllid; /* Reason codes for rejection */ switch (subtype) { case IEEE80211_ACTION_MESHPEERING_OPEN: args[2] = IEEE80211_REASON_MESH_CPVIOLATION; break; case IEEE80211_ACTION_MESHPEERING_CONFIRM: args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS; break; } ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CLOSE, args); mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); mesh_peer_timeout_setup(ni); break; } return NULL; } return (const struct ieee80211_meshpeer_ie *) mp; } static int mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, const struct ieee80211_frame *wh, const uint8_t *frm, const uint8_t *efrm) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_meshpeer_ie ie; const struct ieee80211_meshpeer_ie *meshpeer; uint16_t args[3]; /* +2+2 for action + code + capabilites */ meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie, IEEE80211_ACTION_MESHPEERING_OPEN); if (meshpeer == NULL) { return 0; } /* XXX move up */ IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); switch (ni->ni_mlstate) { case IEEE80211_NODE_MESH_IDLE: /* Reject open request if reached our maximum neighbor count */ if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) { args[0] = meshpeer->peer_llinkid; args[1] = 0; args[2] = IEEE80211_REASON_MESH_MAX_PEERS; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CLOSE, args); /* stay in IDLE state */ return (0); } /* Open frame accepted */ mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); ni->ni_mllid = meshpeer->peer_llinkid; ni->ni_mlpid = mesh_generateid(vap); if (ni->ni_mlpid == 0) return 0; /* XXX */ args[0] = ni->ni_mlpid; /* Announce we're open too... */ ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_OPEN, args); /* ...and confirm the link. */ args[0] = ni->ni_mlpid; args[1] = ni->ni_mllid; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CONFIRM, args); mesh_peer_timeout_setup(ni); break; case IEEE80211_NODE_MESH_OPENRCV: /* Wrong Link ID */ if (ni->ni_mllid != meshpeer->peer_llinkid) { args[0] = ni->ni_mllid; args[1] = ni->ni_mlpid; args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CLOSE, args); mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); mesh_peer_timeout_setup(ni); break; } /* Duplicate open, confirm again. */ args[0] = ni->ni_mlpid; args[1] = ni->ni_mllid; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CONFIRM, args); break; case IEEE80211_NODE_MESH_OPENSNT: ni->ni_mllid = meshpeer->peer_llinkid; mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); args[0] = ni->ni_mlpid; args[1] = ni->ni_mllid; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CONFIRM, args); /* NB: don't setup/clear any timeout */ break; case IEEE80211_NODE_MESH_CONFIRMRCV: if (ni->ni_mlpid != meshpeer->peer_linkid || ni->ni_mllid != meshpeer->peer_llinkid) { args[0] = ni->ni_mlpid; args[1] = ni->ni_mllid; args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CLOSE, args); mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); mesh_peer_timeout_setup(ni); break; } mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); ni->ni_mllid = meshpeer->peer_llinkid; args[0] = ni->ni_mlpid; args[1] = ni->ni_mllid; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CONFIRM, args); mesh_peer_timeout_stop(ni); break; case IEEE80211_NODE_MESH_ESTABLISHED: if (ni->ni_mllid != meshpeer->peer_llinkid) { args[0] = ni->ni_mllid; args[1] = ni->ni_mlpid; args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CLOSE, args); mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); mesh_peer_timeout_setup(ni); break; } args[0] = ni->ni_mlpid; args[1] = ni->ni_mllid; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CONFIRM, args); break; case IEEE80211_NODE_MESH_HOLDING: args[0] = ni->ni_mlpid; args[1] = meshpeer->peer_llinkid; /* Standard not clear about what the reaason code should be */ args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CLOSE, args); break; } return 0; } static int mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, const struct ieee80211_frame *wh, const uint8_t *frm, const uint8_t *efrm) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211_meshpeer_ie ie; const struct ieee80211_meshpeer_ie *meshpeer; uint16_t args[3]; /* +2+2+2+2 for action + code + capabilites + status code + AID */ meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie, IEEE80211_ACTION_MESHPEERING_CONFIRM); if (meshpeer == NULL) { return 0; } IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", meshpeer->peer_llinkid, meshpeer->peer_linkid); switch (ni->ni_mlstate) { case IEEE80211_NODE_MESH_OPENRCV: mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); mesh_peer_timeout_stop(ni); break; case IEEE80211_NODE_MESH_OPENSNT: mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); mesh_peer_timeout_setup(ni); break; case IEEE80211_NODE_MESH_HOLDING: args[0] = ni->ni_mlpid; args[1] = meshpeer->peer_llinkid; /* Standard not clear about what the reaason code should be */ args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CLOSE, args); break; case IEEE80211_NODE_MESH_CONFIRMRCV: if (ni->ni_mllid != meshpeer->peer_llinkid) { args[0] = ni->ni_mlpid; args[1] = ni->ni_mllid; args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CLOSE, args); mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); mesh_peer_timeout_setup(ni); } break; default: IEEE80211_DISCARD(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, wh, NULL, "received confirm in invalid state %d", ni->ni_mlstate); vap->iv_stats.is_rx_mgtdiscard++; break; } return 0; } static int mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, const struct ieee80211_frame *wh, const uint8_t *frm, const uint8_t *efrm) { struct ieee80211_meshpeer_ie ie; const struct ieee80211_meshpeer_ie *meshpeer; uint16_t args[3]; /* +2 for action + code */ meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie, IEEE80211_ACTION_MESHPEERING_CLOSE); if (meshpeer == NULL) { return 0; } /* * XXX: check reason code, for example we could receive * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt * to peer again. */ IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, "%s", "recv PEER CLOSE"); switch (ni->ni_mlstate) { case IEEE80211_NODE_MESH_IDLE: /* ignore */ break; case IEEE80211_NODE_MESH_OPENRCV: case IEEE80211_NODE_MESH_OPENSNT: case IEEE80211_NODE_MESH_CONFIRMRCV: case IEEE80211_NODE_MESH_ESTABLISHED: args[0] = ni->ni_mlpid; args[1] = ni->ni_mllid; args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CLOSE, args); mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); mesh_peer_timeout_setup(ni); break; case IEEE80211_NODE_MESH_HOLDING: mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); mesh_peer_timeout_stop(ni); break; } return 0; } /* * Link Metric handling. */ static int mesh_recv_action_meshlmetric(struct ieee80211_node *ni, const struct ieee80211_frame *wh, const uint8_t *frm, const uint8_t *efrm) { const struct ieee80211_meshlmetric_ie *ie = (const struct ieee80211_meshlmetric_ie *) (frm+2); /* action + code */ struct ieee80211_meshlmetric_ie lm_rep; if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { lm_rep.lm_flags = 0; lm_rep.lm_metric = mesh_airtime_calc(ni); ieee80211_send_action(ni, IEEE80211_ACTION_CAT_MESH, IEEE80211_ACTION_MESH_LMETRIC, &lm_rep); } /* XXX: else do nothing for now */ return 0; } /* * Parse meshgate action ie's for GANN frames. * Returns -1 if parsing fails, otherwise 0. */ static int mesh_parse_meshgate_action(struct ieee80211_node *ni, const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm) { struct ieee80211vap *vap = ni->ni_vap; const struct ieee80211_meshgann_ie *gannie; while (efrm - frm > 1) { IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1); switch (*frm) { case IEEE80211_ELEMID_MESHGANN: gannie = (const struct ieee80211_meshgann_ie *) frm; memset(ie, 0, sizeof(*ie)); ie->gann_ie = gannie->gann_ie; ie->gann_len = gannie->gann_len; ie->gann_flags = gannie->gann_flags; ie->gann_hopcount = gannie->gann_hopcount; ie->gann_ttl = gannie->gann_ttl; IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr); ie->gann_seq = le32dec(&gannie->gann_seq); ie->gann_interval = le16dec(&gannie->gann_interval); break; } frm += frm[1] + 2; } return 0; } /* * Mesh Gate Announcement handling. */ static int mesh_recv_action_meshgate(struct ieee80211_node *ni, const struct ieee80211_frame *wh, const uint8_t *frm, const uint8_t *efrm) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_mesh_gate_route *gr, *next; struct ieee80211_mesh_route *rt_gate; struct ieee80211_meshgann_ie pgann; struct ieee80211_meshgann_ie ie; int found = 0; /* +2 for action + code */ if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, NULL, "%s", "GANN parsing failed"); vap->iv_stats.is_rx_mgtdiscard++; return (0); } if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr)) return 0; IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":", ie.gann_seq); if (ms == NULL) return (0); MESH_RT_LOCK(ms); TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr)) continue; if (ie.gann_seq <= gr->gr_lastseq) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, NULL, "GANN old seqno %u <= %u", ie.gann_seq, gr->gr_lastseq); MESH_RT_UNLOCK(ms); return (0); } /* corresponding mesh gate found & GANN accepted */ found = 1; break; } if (found == 0) { /* this GANN is from a new mesh Gate add it to known table. */ IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, "stored new GANN information, seq %u.", ie.gann_seq); gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), M_80211_MESH_GT_RT, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr); TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); } gr->gr_lastseq = ie.gann_seq; /* check if we have a path to this gate */ rt_gate = mesh_rt_find_locked(ms, gr->gr_addr); if (rt_gate != NULL && rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) { gr->gr_route = rt_gate; rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE; } MESH_RT_UNLOCK(ms); /* popagate only if decremented ttl >= 1 && forwarding is enabled */ if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) return 0; pgann.gann_flags = ie.gann_flags; /* Reserved */ pgann.gann_hopcount = ie.gann_hopcount + 1; pgann.gann_ttl = ie.gann_ttl - 1; IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr); pgann.gann_seq = ie.gann_seq; pgann.gann_interval = ie.gann_interval; IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, "%s", "propagate GANN"); ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, IEEE80211_ACTION_MESH_GANN, &pgann); return 0; } static int mesh_send_action(struct ieee80211_node *ni, const uint8_t sa[IEEE80211_ADDR_LEN], const uint8_t da[IEEE80211_ADDR_LEN], struct mbuf *m) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; struct ieee80211_bpf_params params; struct ieee80211_frame *wh; int ret; KASSERT(ni != NULL, ("null node")); if (vap->iv_state == IEEE80211_S_CAC) { IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, "block %s frame in CAC state", "Mesh action"); vap->iv_stats.is_tx_badstate++; ieee80211_free_node(ni); m_freem(m); return EIO; /* XXX */ } M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); if (m == NULL) { ieee80211_free_node(ni); return ENOMEM; } IEEE80211_TX_LOCK(ic); wh = mtod(m, struct ieee80211_frame *); ieee80211_send_setup(ni, m, IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION, IEEE80211_NONQOS_TID, sa, da, sa); m->m_flags |= M_ENCAP; /* mark encapsulated */ memset(¶ms, 0, sizeof(params)); params.ibp_pri = WME_AC_VO; params.ibp_rate0 = ni->ni_txparms->mgmtrate; if (IEEE80211_IS_MULTICAST(da)) params.ibp_try0 = 1; else params.ibp_try0 = ni->ni_txparms->maxretry; params.ibp_power = ni->ni_txpower; IEEE80211_NODE_STAT(ni, tx_mgmt); ret = ieee80211_raw_output(vap, ni, m, ¶ms); IEEE80211_TX_UNLOCK(ic); return (ret); } #define ADDSHORT(frm, v) do { \ frm[0] = (v) & 0xff; \ frm[1] = (v) >> 8; \ frm += 2; \ } while (0) #define ADDWORD(frm, v) do { \ frm[0] = (v) & 0xff; \ frm[1] = ((v) >> 8) & 0xff; \ frm[2] = ((v) >> 16) & 0xff; \ frm[3] = ((v) >> 24) & 0xff; \ frm += 4; \ } while (0) static int mesh_send_action_meshpeering_open(struct ieee80211_node *ni, int category, int action, void *args0) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; uint16_t *args = args0; const struct ieee80211_rateset *rs; struct mbuf *m; uint8_t *frm; IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, "send PEER OPEN action: localid 0x%x", args[0]); IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); ieee80211_ref_node(ni); m = ieee80211_getmgtframe(&frm, ic->ic_headroom + sizeof(struct ieee80211_frame), sizeof(uint16_t) /* action+category */ + sizeof(uint16_t) /* capabilites */ + 2 + IEEE80211_RATE_SIZE + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) + 2 + IEEE80211_MESHID_LEN + sizeof(struct ieee80211_meshconf_ie) + sizeof(struct ieee80211_meshpeer_ie) ); if (m != NULL) { /* * mesh peer open action frame format: * [1] category * [1] action * [2] capabilities * [tlv] rates * [tlv] xrates * [tlv] mesh id * [tlv] mesh conf * [tlv] mesh peer link mgmt */ *frm++ = category; *frm++ = action; ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); rs = ieee80211_get_suprates(ic, ic->ic_curchan); frm = ieee80211_add_rates(frm, rs); frm = ieee80211_add_xrates(frm, rs); frm = ieee80211_add_meshid(frm, vap); frm = ieee80211_add_meshconf(frm, vap); frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN, args[0], 0, 0); m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); } else { vap->iv_stats.is_tx_nobuf++; ieee80211_free_node(ni); return ENOMEM; } } static int mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, int category, int action, void *args0) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; uint16_t *args = args0; const struct ieee80211_rateset *rs; struct mbuf *m; uint8_t *frm; IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", args[0], args[1]); IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); ieee80211_ref_node(ni); m = ieee80211_getmgtframe(&frm, ic->ic_headroom + sizeof(struct ieee80211_frame), sizeof(uint16_t) /* action+category */ + sizeof(uint16_t) /* capabilites */ + sizeof(uint16_t) /* status code */ + sizeof(uint16_t) /* AID */ + 2 + IEEE80211_RATE_SIZE + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) + 2 + IEEE80211_MESHID_LEN + sizeof(struct ieee80211_meshconf_ie) + sizeof(struct ieee80211_meshpeer_ie) ); if (m != NULL) { /* * mesh peer confirm action frame format: * [1] category * [1] action * [2] capabilities * [2] status code * [2] association id (peer ID) * [tlv] rates * [tlv] xrates * [tlv] mesh id * [tlv] mesh conf * [tlv] mesh peer link mgmt */ *frm++ = category; *frm++ = action; ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); ADDSHORT(frm, 0); /* status code */ ADDSHORT(frm, args[1]); /* AID */ rs = ieee80211_get_suprates(ic, ic->ic_curchan); frm = ieee80211_add_rates(frm, rs); frm = ieee80211_add_xrates(frm, rs); frm = ieee80211_add_meshid(frm, vap); frm = ieee80211_add_meshconf(frm, vap); frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_CONFIRM, args[0], args[1], 0); m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); } else { vap->iv_stats.is_tx_nobuf++; ieee80211_free_node(ni); return ENOMEM; } } static int mesh_send_action_meshpeering_close(struct ieee80211_node *ni, int category, int action, void *args0) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; uint16_t *args = args0; struct mbuf *m; uint8_t *frm; IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d (%s)", args[0], args[1], args[2], ieee80211_reason_to_string(args[2])); IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); ieee80211_ref_node(ni); m = ieee80211_getmgtframe(&frm, ic->ic_headroom + sizeof(struct ieee80211_frame), sizeof(uint16_t) /* action+category */ + sizeof(uint16_t) /* reason code */ + 2 + IEEE80211_MESHID_LEN + sizeof(struct ieee80211_meshpeer_ie) ); if (m != NULL) { /* * mesh peer close action frame format: * [1] category * [1] action * [tlv] mesh id * [tlv] mesh peer link mgmt */ *frm++ = category; *frm++ = action; frm = ieee80211_add_meshid(frm, vap); frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_CLOSE, args[0], args[1], args[2]); m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); } else { vap->iv_stats.is_tx_nobuf++; ieee80211_free_node(ni); return ENOMEM; } } static int mesh_send_action_meshlmetric(struct ieee80211_node *ni, int category, int action, void *arg0) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; struct ieee80211_meshlmetric_ie *ie = arg0; struct mbuf *m; uint8_t *frm; if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, "%s", "send LINK METRIC REQUEST action"); } else { IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, "send LINK METRIC REPLY action: metric 0x%x", ie->lm_metric); } IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); ieee80211_ref_node(ni); m = ieee80211_getmgtframe(&frm, ic->ic_headroom + sizeof(struct ieee80211_frame), sizeof(uint16_t) + /* action+category */ sizeof(struct ieee80211_meshlmetric_ie) ); if (m != NULL) { /* * mesh link metric * [1] category * [1] action * [tlv] mesh link metric */ *frm++ = category; *frm++ = action; frm = ieee80211_add_meshlmetric(frm, ie->lm_flags, ie->lm_metric); m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); } else { vap->iv_stats.is_tx_nobuf++; ieee80211_free_node(ni); return ENOMEM; } } static int mesh_send_action_meshgate(struct ieee80211_node *ni, int category, int action, void *arg0) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; struct ieee80211_meshgann_ie *ie = arg0; struct mbuf *m; uint8_t *frm; IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); ieee80211_ref_node(ni); m = ieee80211_getmgtframe(&frm, ic->ic_headroom + sizeof(struct ieee80211_frame), sizeof(uint16_t) + /* action+category */ IEEE80211_MESHGANN_BASE_SZ ); if (m != NULL) { /* * mesh link metric * [1] category * [1] action * [tlv] mesh gate annoucement */ *frm++ = category; *frm++ = action; frm = ieee80211_add_meshgate(frm, ie); m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m); } else { vap->iv_stats.is_tx_nobuf++; ieee80211_free_node(ni); return ENOMEM; } } static void mesh_peer_timeout_setup(struct ieee80211_node *ni) { switch (ni->ni_mlstate) { case IEEE80211_NODE_MESH_HOLDING: ni->ni_mltval = ieee80211_mesh_holdingtimeout; break; case IEEE80211_NODE_MESH_CONFIRMRCV: ni->ni_mltval = ieee80211_mesh_confirmtimeout; break; case IEEE80211_NODE_MESH_IDLE: ni->ni_mltval = 0; break; default: ni->ni_mltval = ieee80211_mesh_retrytimeout; break; } if (ni->ni_mltval) callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb, ni); } /* * Same as above but backoffs timer statisically 50%. */ static void mesh_peer_timeout_backoff(struct ieee80211_node *ni) { uint32_t r; r = arc4random(); ni->ni_mltval += r % ni->ni_mltval; callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb, ni); } static __inline void mesh_peer_timeout_stop(struct ieee80211_node *ni) { callout_drain(&ni->ni_mltimer); } static void mesh_peer_backoff_cb(void *arg) { struct ieee80211_node *ni = (struct ieee80211_node *)arg; /* After backoff timeout, try to peer automatically again. */ ni->ni_mlhcnt = 0; } /* * Mesh Peer Link Management FSM timeout handling. */ static void mesh_peer_timeout_cb(void *arg) { struct ieee80211_node *ni = (struct ieee80211_node *)arg; uint16_t args[3]; IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, ni, "mesh link timeout, state %d, retry counter %d", ni->ni_mlstate, ni->ni_mlrcnt); switch (ni->ni_mlstate) { case IEEE80211_NODE_MESH_IDLE: case IEEE80211_NODE_MESH_ESTABLISHED: break; case IEEE80211_NODE_MESH_OPENSNT: case IEEE80211_NODE_MESH_OPENRCV: if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { args[0] = ni->ni_mlpid; args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CLOSE, args); ni->ni_mlrcnt = 0; mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); mesh_peer_timeout_setup(ni); } else { args[0] = ni->ni_mlpid; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_OPEN, args); ni->ni_mlrcnt++; mesh_peer_timeout_backoff(ni); } break; case IEEE80211_NODE_MESH_CONFIRMRCV: args[0] = ni->ni_mlpid; args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CLOSE, args); mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); mesh_peer_timeout_setup(ni); break; case IEEE80211_NODE_MESH_HOLDING: ni->ni_mlhcnt++; if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) callout_reset(&ni->ni_mlhtimer, ieee80211_mesh_backofftimeout, mesh_peer_backoff_cb, ni); mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); break; } } static int mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) { struct ieee80211_mesh_state *ms = vap->iv_mesh; if (ie == NULL || ie[1] != ms->ms_idlen) return 1; return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); } /* * Check if we are using the same algorithms for this mesh. */ static int mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) { const struct ieee80211_meshconf_ie *meshconf = (const struct ieee80211_meshconf_ie *) ie; const struct ieee80211_mesh_state *ms = vap->iv_mesh; if (meshconf == NULL) return 1; if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, "unknown path selection algorithm: 0x%x\n", meshconf->conf_pselid); return 1; } if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, "unknown path metric algorithm: 0x%x\n", meshconf->conf_pmetid); return 1; } if (meshconf->conf_ccid != 0) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, "unknown congestion control algorithm: 0x%x\n", meshconf->conf_ccid); return 1; } if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, "unknown sync algorithm: 0x%x\n", meshconf->conf_syncid); return 1; } if (meshconf->conf_authid != 0) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, "unknown auth auth algorithm: 0x%x\n", meshconf->conf_pselid); return 1; } /* Not accepting peers */ if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, "not accepting peers: 0x%x\n", meshconf->conf_cap); return 1; } return 0; } static int mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype, const uint8_t *ie) { const struct ieee80211_meshpeer_ie *meshpeer = (const struct ieee80211_meshpeer_ie *) ie; if (meshpeer == NULL || meshpeer->peer_len < IEEE80211_MPM_BASE_SZ || meshpeer->peer_len > IEEE80211_MPM_MAX_SZ) return 1; if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, "Only MPM protocol is supported (proto: 0x%02X)", meshpeer->peer_proto); return 1; } switch (subtype) { case IEEE80211_ACTION_MESHPEERING_OPEN: if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ) return 1; break; case IEEE80211_ACTION_MESHPEERING_CONFIRM: if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2) return 1; break; case IEEE80211_ACTION_MESHPEERING_CLOSE: if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2) return 1; if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) && meshpeer->peer_linkid != 0) return 1; if (meshpeer->peer_rcode == 0) return 1; break; } return 0; } /* * Add a Mesh ID IE to a frame. */ uint8_t * ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) { struct ieee80211_mesh_state *ms = vap->iv_mesh; KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); *frm++ = IEEE80211_ELEMID_MESHID; *frm++ = ms->ms_idlen; memcpy(frm, ms->ms_id, ms->ms_idlen); return frm + ms->ms_idlen; } /* * Add a Mesh Configuration IE to a frame. * For now just use HWMP routing, Airtime link metric, Null Congestion * Signaling, Null Sync Protocol and Null Authentication. */ uint8_t * ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) { const struct ieee80211_mesh_state *ms = vap->iv_mesh; uint16_t caps; KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); *frm++ = IEEE80211_ELEMID_MESHCONF; *frm++ = IEEE80211_MESH_CONF_SZ; *frm++ = ms->ms_ppath->mpp_ie; /* path selection */ *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */ *frm++ = IEEE80211_MESHCONF_CC_DISABLED; *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF; *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED; /* NB: set the number of neighbors before the rest */ *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ? IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1; if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) *frm |= IEEE80211_MESHCONF_FORM_GATE; frm += 1; caps = 0; if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) caps |= IEEE80211_MESHCONF_CAP_AP; if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) caps |= IEEE80211_MESHCONF_CAP_FWRD; *frm++ = caps; return frm; } /* * Add a Mesh Peer Management IE to a frame. */ uint8_t * ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, uint16_t peerid, uint16_t reason) { KASSERT(localid != 0, ("localid == 0")); *frm++ = IEEE80211_ELEMID_MESHPEER; switch (subtype) { case IEEE80211_ACTION_MESHPEERING_OPEN: *frm++ = IEEE80211_MPM_BASE_SZ; /* length */ ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ ADDSHORT(frm, localid); /* local ID */ break; case IEEE80211_ACTION_MESHPEERING_CONFIRM: KASSERT(peerid != 0, ("sending peer confirm without peer id")); *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ ADDSHORT(frm, localid); /* local ID */ ADDSHORT(frm, peerid); /* peer ID */ break; case IEEE80211_ACTION_MESHPEERING_CLOSE: if (peerid) *frm++ = IEEE80211_MPM_MAX_SZ; /* length */ else *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ ADDSHORT(frm, localid); /* local ID */ if (peerid) ADDSHORT(frm, peerid); /* peer ID */ ADDSHORT(frm, reason); break; } return frm; } /* * Compute an Airtime Link Metric for the link with this node. * * Based on Draft 3.0 spec (11B.10, p.149). */ /* * Max 802.11s overhead. */ #define IEEE80211_MESH_MAXOVERHEAD \ (sizeof(struct ieee80211_qosframe_addr4) \ + sizeof(struct ieee80211_meshcntl_ae10) \ + sizeof(struct llc) \ + IEEE80211_ADDR_LEN \ + IEEE80211_WEP_IVLEN \ + IEEE80211_WEP_KIDLEN \ + IEEE80211_WEP_CRCLEN \ + IEEE80211_WEP_MICLEN \ + IEEE80211_CRC_LEN) uint32_t mesh_airtime_calc(struct ieee80211_node *ni) { #define M_BITS 8 #define S_FACTOR (2 * M_BITS) struct ieee80211com *ic = ni->ni_ic; struct ifnet *ifp = ni->ni_vap->iv_ifp; const static int nbits = 8192 << M_BITS; uint32_t overhead, rate, errrate; uint64_t res; /* Time to transmit a frame */ rate = ni->ni_txrate; overhead = ieee80211_compute_duration(ic->ic_rt, ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; /* Error rate in percentage */ /* XXX assuming small failures are ok */ errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) + ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS) / 100; res = (overhead + (nbits / rate)) * ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); return (uint32_t)(res >> S_FACTOR); #undef M_BITS #undef S_FACTOR } /* * Add a Mesh Link Metric report IE to a frame. */ uint8_t * ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric) { *frm++ = IEEE80211_ELEMID_MESHLINK; *frm++ = 5; *frm++ = flags; ADDWORD(frm, metric); return frm; } /* * Add a Mesh Gate Announcement IE to a frame. */ uint8_t * ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie) { *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */ *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */ *frm++ = ie->gann_flags; *frm++ = ie->gann_hopcount; *frm++ = ie->gann_ttl; IEEE80211_ADDR_COPY(frm, ie->gann_addr); frm += 6; ADDWORD(frm, ie->gann_seq); ADDSHORT(frm, ie->gann_interval); return frm; } #undef ADDSHORT #undef ADDWORD /* * Initialize any mesh-specific node state. */ void ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) { ni->ni_flags |= IEEE80211_NODE_QOS; callout_init(&ni->ni_mltimer, 1); callout_init(&ni->ni_mlhtimer, 1); } /* * Cleanup any mesh-specific node state. */ void ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211_mesh_state *ms = vap->iv_mesh; callout_drain(&ni->ni_mltimer); callout_drain(&ni->ni_mlhtimer); /* NB: short-circuit callbacks after mesh_vdetach */ if (vap->iv_mesh != NULL) ms->ms_ppath->mpp_peerdown(ni); } void ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) { ni->ni_meshidlen = ie[1]; memcpy(ni->ni_meshid, ie + 2, ie[1]); } /* * Setup mesh-specific node state on neighbor discovery. */ void ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, const struct ieee80211_frame *wh, const struct ieee80211_scanparams *sp) { ieee80211_parse_meshid(ni, sp->meshid); } void ieee80211_mesh_update_beacon(struct ieee80211vap *vap, struct ieee80211_beacon_offsets *bo) { KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) { (void)ieee80211_add_meshconf(bo->bo_meshconf, vap); clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF); } } static int mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) { struct ieee80211_mesh_state *ms = vap->iv_mesh; uint8_t tmpmeshid[IEEE80211_NWID_LEN]; struct ieee80211_mesh_route *rt; struct ieee80211req_mesh_route *imr; size_t len, off; uint8_t *p; int error; if (vap->iv_opmode != IEEE80211_M_MBSS) return ENOSYS; error = 0; switch (ireq->i_type) { case IEEE80211_IOC_MESH_ID: ireq->i_len = ms->ms_idlen; memcpy(tmpmeshid, ms->ms_id, ireq->i_len); error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); break; case IEEE80211_IOC_MESH_AP: ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; break; case IEEE80211_IOC_MESH_FWRD: ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; break; case IEEE80211_IOC_MESH_GATE: ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0; break; case IEEE80211_IOC_MESH_TTL: ireq->i_val = ms->ms_ttl; break; case IEEE80211_IOC_MESH_RTCMD: switch (ireq->i_val) { case IEEE80211_MESH_RTCMD_LIST: len = 0; MESH_RT_LOCK(ms); TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { len += sizeof(*imr); } MESH_RT_UNLOCK(ms); if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { ireq->i_len = len; return ENOMEM; } ireq->i_len = len; /* XXX M_WAIT? */ p = IEEE80211_MALLOC(len, M_TEMP, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); if (p == NULL) return ENOMEM; off = 0; MESH_RT_LOCK(ms); TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { if (off >= len) break; imr = (struct ieee80211req_mesh_route *) (p + off); IEEE80211_ADDR_COPY(imr->imr_dest, rt->rt_dest); IEEE80211_ADDR_COPY(imr->imr_nexthop, rt->rt_nexthop); imr->imr_metric = rt->rt_metric; imr->imr_nhops = rt->rt_nhops; imr->imr_lifetime = ieee80211_mesh_rt_update(rt, 0); imr->imr_lastmseq = rt->rt_lastmseq; imr->imr_flags = rt->rt_flags; /* last */ off += sizeof(*imr); } MESH_RT_UNLOCK(ms); error = copyout(p, (uint8_t *)ireq->i_data, ireq->i_len); IEEE80211_FREE(p, M_TEMP); break; case IEEE80211_MESH_RTCMD_FLUSH: case IEEE80211_MESH_RTCMD_ADD: case IEEE80211_MESH_RTCMD_DELETE: return EINVAL; default: return ENOSYS; } break; case IEEE80211_IOC_MESH_PR_METRIC: len = strlen(ms->ms_pmetric->mpm_descr); if (ireq->i_len < len) return EINVAL; ireq->i_len = len; error = copyout(ms->ms_pmetric->mpm_descr, (uint8_t *)ireq->i_data, len); break; case IEEE80211_IOC_MESH_PR_PATH: len = strlen(ms->ms_ppath->mpp_descr); if (ireq->i_len < len) return EINVAL; ireq->i_len = len; error = copyout(ms->ms_ppath->mpp_descr, (uint8_t *)ireq->i_data, len); break; default: return ENOSYS; } return error; } IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); static int mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) { struct ieee80211_mesh_state *ms = vap->iv_mesh; uint8_t tmpmeshid[IEEE80211_NWID_LEN]; uint8_t tmpaddr[IEEE80211_ADDR_LEN]; char tmpproto[IEEE80211_MESH_PROTO_DSZ]; int error; if (vap->iv_opmode != IEEE80211_M_MBSS) return ENOSYS; error = 0; switch (ireq->i_type) { case IEEE80211_IOC_MESH_ID: if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) return EINVAL; error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); if (error != 0) break; memset(ms->ms_id, 0, IEEE80211_NWID_LEN); ms->ms_idlen = ireq->i_len; memcpy(ms->ms_id, tmpmeshid, ireq->i_len); error = ENETRESET; break; case IEEE80211_IOC_MESH_AP: if (ireq->i_val) ms->ms_flags |= IEEE80211_MESHFLAGS_AP; else ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; error = ENETRESET; break; case IEEE80211_IOC_MESH_FWRD: if (ireq->i_val) ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; else ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; mesh_gatemode_setup(vap); break; case IEEE80211_IOC_MESH_GATE: if (ireq->i_val) ms->ms_flags |= IEEE80211_MESHFLAGS_GATE; else ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE; break; case IEEE80211_IOC_MESH_TTL: ms->ms_ttl = (uint8_t) ireq->i_val; break; case IEEE80211_IOC_MESH_RTCMD: switch (ireq->i_val) { case IEEE80211_MESH_RTCMD_LIST: return EINVAL; case IEEE80211_MESH_RTCMD_FLUSH: ieee80211_mesh_rt_flush(vap); break; case IEEE80211_MESH_RTCMD_ADD: if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) || IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data)) return EINVAL; error = copyin(ireq->i_data, &tmpaddr, IEEE80211_ADDR_LEN); if (error == 0) ieee80211_mesh_discover(vap, tmpaddr, NULL); break; case IEEE80211_MESH_RTCMD_DELETE: ieee80211_mesh_rt_del(vap, ireq->i_data); break; default: return ENOSYS; } break; case IEEE80211_IOC_MESH_PR_METRIC: error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); if (error == 0) { error = mesh_select_proto_metric(vap, tmpproto); if (error == 0) error = ENETRESET; } break; case IEEE80211_IOC_MESH_PR_PATH: error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); if (error == 0) { error = mesh_select_proto_path(vap, tmpproto); if (error == 0) error = ENETRESET; } break; default: return ENOSYS; } return error; } IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211); Index: head/sys/net80211/ieee80211_output.c =================================================================== --- head/sys/net80211/ieee80211_output.c (revision 298375) +++ head/sys/net80211/ieee80211_output.c (revision 298376) @@ -1,3540 +1,3536 @@ /*- * Copyright (c) 2001 Atsushi Onoe * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); #include "opt_inet.h" #include "opt_inet6.h" #include "opt_wlan.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef IEEE80211_SUPPORT_SUPERG #include #endif #ifdef IEEE80211_SUPPORT_TDMA #include #endif #include #include #if defined(INET) || defined(INET6) #include #endif #ifdef INET #include #include #include #endif #ifdef INET6 #include #endif #include #define ETHER_HEADER_COPY(dst, src) \ memcpy(dst, src, sizeof(struct ether_header)) static int ieee80211_fragment(struct ieee80211vap *, struct mbuf *, u_int hdrsize, u_int ciphdrsize, u_int mtu); static void ieee80211_tx_mgt_cb(struct ieee80211_node *, void *, int); #ifdef IEEE80211_DEBUG /* * Decide if an outbound management frame should be * printed when debugging is enabled. This filters some * of the less interesting frames that come frequently * (e.g. beacons). */ static __inline int doprint(struct ieee80211vap *vap, int subtype) { switch (subtype) { case IEEE80211_FC0_SUBTYPE_PROBE_RESP: return (vap->iv_opmode == IEEE80211_M_IBSS); } return 1; } #endif /* * Transmit a frame to the given destination on the given VAP. * * It's up to the caller to figure out the details of who this * is going to and resolving the node. * * This routine takes care of queuing it for power save, * A-MPDU state stuff, fast-frames state stuff, encapsulation * if required, then passing it up to the driver layer. * * This routine (for now) consumes the mbuf and frees the node * reference; it ideally will return a TX status which reflects * whether the mbuf was consumed or not, so the caller can * free the mbuf (if appropriate) and the node reference (again, * if appropriate.) */ int ieee80211_vap_pkt_send_dest(struct ieee80211vap *vap, struct mbuf *m, struct ieee80211_node *ni) { struct ieee80211com *ic = vap->iv_ic; struct ifnet *ifp = vap->iv_ifp; int len, mcast; if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && (m->m_flags & M_PWR_SAV) == 0) { /* * Station in power save mode; pass the frame * to the 802.11 layer and continue. We'll get * the frame back when the time is right. * XXX lose WDS vap linkage? */ if (ieee80211_pwrsave(ni, m) != 0) if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); ieee80211_free_node(ni); /* * We queued it fine, so tell the upper layer * that we consumed it. */ return (0); } /* calculate priority so drivers can find the tx queue */ if (ieee80211_classify(ni, m)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT, ni->ni_macaddr, NULL, "%s", "classification failure"); vap->iv_stats.is_tx_classify++; if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); m_freem(m); ieee80211_free_node(ni); /* XXX better status? */ return (0); } /* * Stash the node pointer. Note that we do this after * any call to ieee80211_dwds_mcast because that code * uses any existing value for rcvif to identify the * interface it (might have been) received on. */ m->m_pkthdr.rcvif = (void *)ni; mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1: 0; len = m->m_pkthdr.len; BPF_MTAP(ifp, m); /* 802.3 tx */ /* * Check if A-MPDU tx aggregation is setup or if we * should try to enable it. The sta must be associated * with HT and A-MPDU enabled for use. When the policy * routine decides we should enable A-MPDU we issue an * ADDBA request and wait for a reply. The frame being * encapsulated will go out w/o using A-MPDU, or possibly * it might be collected by the driver and held/retransmit. * The default ic_ampdu_enable routine handles staggering * ADDBA requests in case the receiver NAK's us or we are * otherwise unable to establish a BA stream. */ if ((ni->ni_flags & IEEE80211_NODE_AMPDU_TX) && (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_TX)) { if ((m->m_flags & M_EAPOL) == 0) { int tid = WME_AC_TO_TID(M_WME_GETAC(m)); struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[tid]; ieee80211_txampdu_count_packet(tap); if (IEEE80211_AMPDU_RUNNING(tap)) { /* * Operational, mark frame for aggregation. * * XXX do tx aggregation here */ m->m_flags |= M_AMPDU_MPDU; } else if (!IEEE80211_AMPDU_REQUESTED(tap) && ic->ic_ampdu_enable(ni, tap)) { /* * Not negotiated yet, request service. */ ieee80211_ampdu_request(ni, tap); /* XXX hold frame for reply? */ } } } #ifdef IEEE80211_SUPPORT_SUPERG /* * Check for AMSDU/FF; queue for aggregation * * Note: we don't bother trying to do fast frames or * A-MSDU encapsulation for 802.3 drivers. Now, we * likely could do it for FF (because it's a magic * atheros tunnel LLC type) but I don't think we're going * to really need to. For A-MSDU we'd have to set the * A-MSDU QoS bit in the wifi header, so we just plain * can't do it. * * Strictly speaking, we could actually /do/ A-MSDU / FF * with A-MPDU together which for certain circumstances * is beneficial (eg A-MSDU of TCK ACKs.) However, * I'll ignore that for now so existing behaviour is maintained. * Later on it would be good to make "amsdu + ampdu" configurable. */ else if (__predict_true((vap->iv_caps & IEEE80211_C_8023ENCAP) == 0)) { if ((! mcast) && ieee80211_amsdu_tx_ok(ni)) { m = ieee80211_amsdu_check(ni, m); if (m == NULL) { /* NB: any ni ref held on stageq */ IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, "%s: amsdu_check queued frame\n", __func__); return (0); } } else if ((! mcast) && IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF)) { m = ieee80211_ff_check(ni, m); if (m == NULL) { /* NB: any ni ref held on stageq */ IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, "%s: ff_check queued frame\n", __func__); return (0); } } } #endif /* IEEE80211_SUPPORT_SUPERG */ /* * Grab the TX lock - serialise the TX process from this * point (where TX state is being checked/modified) * through to driver queue. */ IEEE80211_TX_LOCK(ic); /* * XXX make the encap and transmit code a separate function * so things like the FF (and later A-MSDU) path can just call * it for flushed frames. */ if (__predict_true((vap->iv_caps & IEEE80211_C_8023ENCAP) == 0)) { /* * Encapsulate the packet in prep for transmission. */ m = ieee80211_encap(vap, ni, m); if (m == NULL) { /* NB: stat+msg handled in ieee80211_encap */ IEEE80211_TX_UNLOCK(ic); ieee80211_free_node(ni); if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); return (ENOBUFS); } } (void) ieee80211_parent_xmitpkt(ic, m); /* * Unlock at this point - no need to hold it across * ieee80211_free_node() (ie, the comlock) */ IEEE80211_TX_UNLOCK(ic); ic->ic_lastdata = ticks; return (0); } /* * Send the given mbuf through the given vap. * * This consumes the mbuf regardless of whether the transmit * was successful or not. * * This does none of the initial checks that ieee80211_start() * does (eg CAC timeout, interface wakeup) - the caller must * do this first. */ static int ieee80211_start_pkt(struct ieee80211vap *vap, struct mbuf *m) { #define IS_DWDS(vap) \ (vap->iv_opmode == IEEE80211_M_WDS && \ (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0) struct ieee80211com *ic = vap->iv_ic; struct ifnet *ifp = vap->iv_ifp; struct ieee80211_node *ni; struct ether_header *eh; /* * Cancel any background scan. */ if (ic->ic_flags & IEEE80211_F_SCAN) ieee80211_cancel_anyscan(vap); /* * Find the node for the destination so we can do * things like power save and fast frames aggregation. * * NB: past this point various code assumes the first * mbuf has the 802.3 header present (and contiguous). */ ni = NULL; if (m->m_len < sizeof(struct ether_header) && (m = m_pullup(m, sizeof(struct ether_header))) == NULL) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, "discard frame, %s\n", "m_pullup failed"); vap->iv_stats.is_tx_nobuf++; /* XXX */ if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); return (ENOBUFS); } eh = mtod(m, struct ether_header *); if (ETHER_IS_MULTICAST(eh->ether_dhost)) { if (IS_DWDS(vap)) { /* * Only unicast frames from the above go out * DWDS vaps; multicast frames are handled by * dispatching the frame as it comes through * the AP vap (see below). */ IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_WDS, eh->ether_dhost, "mcast", "%s", "on DWDS"); vap->iv_stats.is_dwds_mcast++; m_freem(m); if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); /* XXX better status? */ return (ENOBUFS); } if (vap->iv_opmode == IEEE80211_M_HOSTAP) { /* * Spam DWDS vap's w/ multicast traffic. */ /* XXX only if dwds in use? */ ieee80211_dwds_mcast(vap, m); } } #ifdef IEEE80211_SUPPORT_MESH if (vap->iv_opmode != IEEE80211_M_MBSS) { #endif ni = ieee80211_find_txnode(vap, eh->ether_dhost); if (ni == NULL) { /* NB: ieee80211_find_txnode does stat+msg */ if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); m_freem(m); /* XXX better status? */ return (ENOBUFS); } if (ni->ni_associd == 0 && (ni->ni_flags & IEEE80211_NODE_ASSOCID)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT, eh->ether_dhost, NULL, "sta not associated (type 0x%04x)", htons(eh->ether_type)); vap->iv_stats.is_tx_notassoc++; if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); m_freem(m); ieee80211_free_node(ni); /* XXX better status? */ return (ENOBUFS); } #ifdef IEEE80211_SUPPORT_MESH } else { if (!IEEE80211_ADDR_EQ(eh->ether_shost, vap->iv_myaddr)) { /* * Proxy station only if configured. */ if (!ieee80211_mesh_isproxyena(vap)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_MESH, eh->ether_dhost, NULL, "%s", "proxy not enabled"); vap->iv_stats.is_mesh_notproxy++; if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); m_freem(m); /* XXX better status? */ return (ENOBUFS); } IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, "forward frame from DS SA(%6D), DA(%6D)\n", eh->ether_shost, ":", eh->ether_dhost, ":"); ieee80211_mesh_proxy_check(vap, eh->ether_shost); } ni = ieee80211_mesh_discover(vap, eh->ether_dhost, m); if (ni == NULL) { /* * NB: ieee80211_mesh_discover holds/disposes * frame (e.g. queueing on path discovery). */ if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); /* XXX better status? */ return (ENOBUFS); } } #endif /* * We've resolved the sender, so attempt to transmit it. */ if (vap->iv_state == IEEE80211_S_SLEEP) { /* * In power save; queue frame and then wakeup device * for transmit. */ ic->ic_lastdata = ticks; if (ieee80211_pwrsave(ni, m) != 0) if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); ieee80211_free_node(ni); ieee80211_new_state(vap, IEEE80211_S_RUN, 0); return (0); } if (ieee80211_vap_pkt_send_dest(vap, m, ni) != 0) return (ENOBUFS); return (0); #undef IS_DWDS } /* * Start method for vap's. All packets from the stack come * through here. We handle common processing of the packets * before dispatching them to the underlying device. * * if_transmit() requires that the mbuf be consumed by this call * regardless of the return condition. */ int ieee80211_vap_transmit(struct ifnet *ifp, struct mbuf *m) { struct ieee80211vap *vap = ifp->if_softc; struct ieee80211com *ic = vap->iv_ic; /* * No data frames go out unless we're running. * Note in particular this covers CAC and CSA * states (though maybe we should check muting * for CSA). */ if (vap->iv_state != IEEE80211_S_RUN && vap->iv_state != IEEE80211_S_SLEEP) { IEEE80211_LOCK(ic); /* re-check under the com lock to avoid races */ if (vap->iv_state != IEEE80211_S_RUN && vap->iv_state != IEEE80211_S_SLEEP) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, "%s: ignore queue, in %s state\n", __func__, ieee80211_state_name[vap->iv_state]); vap->iv_stats.is_tx_badstate++; IEEE80211_UNLOCK(ic); ifp->if_drv_flags |= IFF_DRV_OACTIVE; m_freem(m); if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); return (ENETDOWN); } IEEE80211_UNLOCK(ic); } /* * Sanitize mbuf flags for net80211 use. We cannot * clear M_PWR_SAV or M_MORE_DATA because these may * be set for frames that are re-submitted from the * power save queue. * * NB: This must be done before ieee80211_classify as * it marks EAPOL in frames with M_EAPOL. */ m->m_flags &= ~(M_80211_TX - M_PWR_SAV - M_MORE_DATA); /* * Bump to the packet transmission path. * The mbuf will be consumed here. */ return (ieee80211_start_pkt(vap, m)); } void ieee80211_vap_qflush(struct ifnet *ifp) { /* Empty for now */ } /* * 802.11 raw output routine. * * XXX TODO: this (and other send routines) should correctly * XXX keep the pwr mgmt bit set if it decides to call into the * XXX driver to send a frame whilst the state is SLEEP. * * Otherwise the peer may decide that we're awake and flood us * with traffic we are still too asleep to receive! */ int ieee80211_raw_output(struct ieee80211vap *vap, struct ieee80211_node *ni, struct mbuf *m, const struct ieee80211_bpf_params *params) { struct ieee80211com *ic = vap->iv_ic; int error; /* * Set node - the caller has taken a reference, so ensure * that the mbuf has the same node value that * it would if it were going via the normal path. */ m->m_pkthdr.rcvif = (void *)ni; /* * Attempt to add bpf transmit parameters. * * For now it's ok to fail; the raw_xmit api still takes * them as an option. * * Later on when ic_raw_xmit() has params removed, * they'll have to be added - so fail the transmit if * they can't be. */ if (params) (void) ieee80211_add_xmit_params(m, params); error = ic->ic_raw_xmit(ni, m, params); if (error) { if_inc_counter(vap->iv_ifp, IFCOUNTER_OERRORS, 1); ieee80211_free_node(ni); } return (error); } /* * 802.11 output routine. This is (currently) used only to * connect bpf write calls to the 802.11 layer for injecting * raw 802.11 frames. */ int ieee80211_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst, struct route *ro) { #define senderr(e) do { error = (e); goto bad;} while (0) struct ieee80211_node *ni = NULL; struct ieee80211vap *vap; struct ieee80211_frame *wh; struct ieee80211com *ic = NULL; int error; int ret; if (ifp->if_drv_flags & IFF_DRV_OACTIVE) { /* * Short-circuit requests if the vap is marked OACTIVE * as this can happen because a packet came down through * ieee80211_start before the vap entered RUN state in * which case it's ok to just drop the frame. This * should not be necessary but callers of if_output don't * check OACTIVE. */ senderr(ENETDOWN); } vap = ifp->if_softc; ic = vap->iv_ic; /* * Hand to the 802.3 code if not tagged as * a raw 802.11 frame. */ if (dst->sa_family != AF_IEEE80211) return vap->iv_output(ifp, m, dst, ro); #ifdef MAC error = mac_ifnet_check_transmit(ifp, m); if (error) senderr(error); #endif if (ifp->if_flags & IFF_MONITOR) senderr(ENETDOWN); if (!IFNET_IS_UP_RUNNING(ifp)) senderr(ENETDOWN); if (vap->iv_state == IEEE80211_S_CAC) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, "block %s frame in CAC state\n", "raw data"); vap->iv_stats.is_tx_badstate++; senderr(EIO); /* XXX */ } else if (vap->iv_state == IEEE80211_S_SCAN) senderr(EIO); /* XXX bypass bridge, pfil, carp, etc. */ if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_ack)) senderr(EIO); /* XXX */ wh = mtod(m, struct ieee80211_frame *); if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != IEEE80211_FC0_VERSION_0) senderr(EIO); /* XXX */ /* locate destination node */ switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) { case IEEE80211_FC1_DIR_NODS: case IEEE80211_FC1_DIR_FROMDS: ni = ieee80211_find_txnode(vap, wh->i_addr1); break; case IEEE80211_FC1_DIR_TODS: case IEEE80211_FC1_DIR_DSTODS: if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) senderr(EIO); /* XXX */ ni = ieee80211_find_txnode(vap, wh->i_addr3); break; default: senderr(EIO); /* XXX */ } if (ni == NULL) { /* * Permit packets w/ bpf params through regardless * (see below about sa_len). */ if (dst->sa_len == 0) senderr(EHOSTUNREACH); ni = ieee80211_ref_node(vap->iv_bss); } /* * Sanitize mbuf for net80211 flags leaked from above. * * NB: This must be done before ieee80211_classify as * it marks EAPOL in frames with M_EAPOL. */ m->m_flags &= ~M_80211_TX; /* calculate priority so drivers can find the tx queue */ /* XXX assumes an 802.3 frame */ if (ieee80211_classify(ni, m)) senderr(EIO); /* XXX */ if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); IEEE80211_NODE_STAT(ni, tx_data); if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { IEEE80211_NODE_STAT(ni, tx_mcast); m->m_flags |= M_MCAST; } else IEEE80211_NODE_STAT(ni, tx_ucast); /* NB: ieee80211_encap does not include 802.11 header */ IEEE80211_NODE_STAT_ADD(ni, tx_bytes, m->m_pkthdr.len); IEEE80211_TX_LOCK(ic); /* * NB: DLT_IEEE802_11_RADIO identifies the parameters are * present by setting the sa_len field of the sockaddr (yes, * this is a hack). * NB: we assume sa_data is suitably aligned to cast. */ ret = ieee80211_raw_output(vap, ni, m, (const struct ieee80211_bpf_params *)(dst->sa_len ? dst->sa_data : NULL)); IEEE80211_TX_UNLOCK(ic); return (ret); bad: if (m != NULL) m_freem(m); if (ni != NULL) ieee80211_free_node(ni); if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); return error; #undef senderr } /* * Set the direction field and address fields of an outgoing * frame. Note this should be called early on in constructing * a frame as it sets i_fc[1]; other bits can then be or'd in. */ void ieee80211_send_setup( struct ieee80211_node *ni, struct mbuf *m, int type, int tid, const uint8_t sa[IEEE80211_ADDR_LEN], const uint8_t da[IEEE80211_ADDR_LEN], const uint8_t bssid[IEEE80211_ADDR_LEN]) { #define WH4(wh) ((struct ieee80211_frame_addr4 *)wh) struct ieee80211vap *vap = ni->ni_vap; struct ieee80211_tx_ampdu *tap; struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *); ieee80211_seq seqno; IEEE80211_TX_LOCK_ASSERT(ni->ni_ic); wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | type; if ((type & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_DATA) { switch (vap->iv_opmode) { case IEEE80211_M_STA: wh->i_fc[1] = IEEE80211_FC1_DIR_TODS; IEEE80211_ADDR_COPY(wh->i_addr1, bssid); IEEE80211_ADDR_COPY(wh->i_addr2, sa); IEEE80211_ADDR_COPY(wh->i_addr3, da); break; case IEEE80211_M_IBSS: case IEEE80211_M_AHDEMO: wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; IEEE80211_ADDR_COPY(wh->i_addr1, da); IEEE80211_ADDR_COPY(wh->i_addr2, sa); IEEE80211_ADDR_COPY(wh->i_addr3, bssid); break; case IEEE80211_M_HOSTAP: wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; IEEE80211_ADDR_COPY(wh->i_addr1, da); IEEE80211_ADDR_COPY(wh->i_addr2, bssid); IEEE80211_ADDR_COPY(wh->i_addr3, sa); break; case IEEE80211_M_WDS: wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; IEEE80211_ADDR_COPY(wh->i_addr1, da); IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); IEEE80211_ADDR_COPY(wh->i_addr3, da); IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa); break; case IEEE80211_M_MBSS: #ifdef IEEE80211_SUPPORT_MESH if (IEEE80211_IS_MULTICAST(da)) { wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; /* XXX next hop */ IEEE80211_ADDR_COPY(wh->i_addr1, da); IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); } else { wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; IEEE80211_ADDR_COPY(wh->i_addr1, da); IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); IEEE80211_ADDR_COPY(wh->i_addr3, da); IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa); } #endif break; case IEEE80211_M_MONITOR: /* NB: to quiet compiler */ break; } } else { wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; IEEE80211_ADDR_COPY(wh->i_addr1, da); IEEE80211_ADDR_COPY(wh->i_addr2, sa); #ifdef IEEE80211_SUPPORT_MESH if (vap->iv_opmode == IEEE80211_M_MBSS) IEEE80211_ADDR_COPY(wh->i_addr3, sa); else #endif IEEE80211_ADDR_COPY(wh->i_addr3, bssid); } *(uint16_t *)&wh->i_dur[0] = 0; tap = &ni->ni_tx_ampdu[tid]; if (tid != IEEE80211_NONQOS_TID && IEEE80211_AMPDU_RUNNING(tap)) m->m_flags |= M_AMPDU_MPDU; else { if (IEEE80211_HAS_SEQ(type & IEEE80211_FC0_TYPE_MASK, type & IEEE80211_FC0_SUBTYPE_MASK)) seqno = ni->ni_txseqs[tid]++; else seqno = 0; *(uint16_t *)&wh->i_seq[0] = htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); M_SEQNO_SET(m, seqno); } if (IEEE80211_IS_MULTICAST(wh->i_addr1)) m->m_flags |= M_MCAST; #undef WH4 } /* * Send a management frame to the specified node. The node pointer * must have a reference as the pointer will be passed to the driver * and potentially held for a long time. If the frame is successfully * dispatched to the driver, then it is responsible for freeing the * reference (and potentially free'ing up any associated storage); * otherwise deal with reclaiming any reference (on error). */ int ieee80211_mgmt_output(struct ieee80211_node *ni, struct mbuf *m, int type, struct ieee80211_bpf_params *params) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; struct ieee80211_frame *wh; int ret; KASSERT(ni != NULL, ("null node")); if (vap->iv_state == IEEE80211_S_CAC) { IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, ni, "block %s frame in CAC state", - ieee80211_mgt_subtype_name[ - (type & IEEE80211_FC0_SUBTYPE_MASK) >> - IEEE80211_FC0_SUBTYPE_SHIFT]); + ieee80211_mgt_subtype_name(type)); vap->iv_stats.is_tx_badstate++; ieee80211_free_node(ni); m_freem(m); return EIO; /* XXX */ } M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); if (m == NULL) { ieee80211_free_node(ni); return ENOMEM; } IEEE80211_TX_LOCK(ic); wh = mtod(m, struct ieee80211_frame *); ieee80211_send_setup(ni, m, IEEE80211_FC0_TYPE_MGT | type, IEEE80211_NONQOS_TID, vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); if (params->ibp_flags & IEEE80211_BPF_CRYPTO) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr1, "encrypting frame (%s)", __func__); wh->i_fc[1] |= IEEE80211_FC1_PROTECTED; } m->m_flags |= M_ENCAP; /* mark encapsulated */ KASSERT(type != IEEE80211_FC0_SUBTYPE_PROBE_RESP, ("probe response?")); M_WME_SETAC(m, params->ibp_pri); #ifdef IEEE80211_DEBUG /* avoid printing too many frames */ if ((ieee80211_msg_debug(vap) && doprint(vap, type)) || ieee80211_msg_dumppkts(vap)) { printf("[%s] send %s on channel %u\n", ether_sprintf(wh->i_addr1), - ieee80211_mgt_subtype_name[ - (type & IEEE80211_FC0_SUBTYPE_MASK) >> - IEEE80211_FC0_SUBTYPE_SHIFT], + ieee80211_mgt_subtype_name(type), ieee80211_chan2ieee(ic, ic->ic_curchan)); } #endif IEEE80211_NODE_STAT(ni, tx_mgmt); ret = ieee80211_raw_output(vap, ni, m, params); IEEE80211_TX_UNLOCK(ic); return (ret); } static void ieee80211_nulldata_transmitted(struct ieee80211_node *ni, void *arg, int status) { struct ieee80211vap *vap = ni->ni_vap; wakeup(vap); } /* * Send a null data frame to the specified node. If the station * is setup for QoS then a QoS Null Data frame is constructed. * If this is a WDS station then a 4-address frame is constructed. * * NB: the caller is assumed to have setup a node reference * for use; this is necessary to deal with a race condition * when probing for inactive stations. Like ieee80211_mgmt_output * we must cleanup any node reference on error; however we * can safely just unref it as we know it will never be the * last reference to the node. */ int ieee80211_send_nulldata(struct ieee80211_node *ni) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; struct mbuf *m; struct ieee80211_frame *wh; int hdrlen; uint8_t *frm; int ret; if (vap->iv_state == IEEE80211_S_CAC) { IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH, ni, "block %s frame in CAC state", "null data"); ieee80211_unref_node(&ni); vap->iv_stats.is_tx_badstate++; return EIO; /* XXX */ } if (ni->ni_flags & (IEEE80211_NODE_QOS|IEEE80211_NODE_HT)) hdrlen = sizeof(struct ieee80211_qosframe); else hdrlen = sizeof(struct ieee80211_frame); /* NB: only WDS vap's get 4-address frames */ if (vap->iv_opmode == IEEE80211_M_WDS) hdrlen += IEEE80211_ADDR_LEN; if (ic->ic_flags & IEEE80211_F_DATAPAD) hdrlen = roundup(hdrlen, sizeof(uint32_t)); m = ieee80211_getmgtframe(&frm, ic->ic_headroom + hdrlen, 0); if (m == NULL) { /* XXX debug msg */ ieee80211_unref_node(&ni); vap->iv_stats.is_tx_nobuf++; return ENOMEM; } KASSERT(M_LEADINGSPACE(m) >= hdrlen, ("leading space %zd", M_LEADINGSPACE(m))); M_PREPEND(m, hdrlen, M_NOWAIT); if (m == NULL) { /* NB: cannot happen */ ieee80211_free_node(ni); return ENOMEM; } IEEE80211_TX_LOCK(ic); wh = mtod(m, struct ieee80211_frame *); /* NB: a little lie */ if (ni->ni_flags & IEEE80211_NODE_QOS) { const int tid = WME_AC_TO_TID(WME_AC_BE); uint8_t *qos; ieee80211_send_setup(ni, m, IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_QOS_NULL, tid, vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); if (vap->iv_opmode == IEEE80211_M_WDS) qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; else qos = ((struct ieee80211_qosframe *) wh)->i_qos; qos[0] = tid & IEEE80211_QOS_TID; if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[WME_AC_BE].wmep_noackPolicy) qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK; qos[1] = 0; } else { ieee80211_send_setup(ni, m, IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_NODATA, IEEE80211_NONQOS_TID, vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); } if (vap->iv_opmode != IEEE80211_M_WDS) { /* NB: power management bit is never sent by an AP */ if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && vap->iv_opmode != IEEE80211_M_HOSTAP) wh->i_fc[1] |= IEEE80211_FC1_PWR_MGT; } if ((ic->ic_flags & IEEE80211_F_SCAN) && (ni->ni_flags & IEEE80211_NODE_PWR_MGT)) { ieee80211_add_callback(m, ieee80211_nulldata_transmitted, NULL); } m->m_len = m->m_pkthdr.len = hdrlen; m->m_flags |= M_ENCAP; /* mark encapsulated */ M_WME_SETAC(m, WME_AC_BE); IEEE80211_NODE_STAT(ni, tx_data); IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, ni, "send %snull data frame on channel %u, pwr mgt %s", ni->ni_flags & IEEE80211_NODE_QOS ? "QoS " : "", ieee80211_chan2ieee(ic, ic->ic_curchan), wh->i_fc[1] & IEEE80211_FC1_PWR_MGT ? "ena" : "dis"); ret = ieee80211_raw_output(vap, ni, m, NULL); IEEE80211_TX_UNLOCK(ic); return (ret); } /* * Assign priority to a frame based on any vlan tag assigned * to the station and/or any Diffserv setting in an IP header. * Finally, if an ACM policy is setup (in station mode) it's * applied. */ int ieee80211_classify(struct ieee80211_node *ni, struct mbuf *m) { const struct ether_header *eh = mtod(m, struct ether_header *); int v_wme_ac, d_wme_ac, ac; /* * Always promote PAE/EAPOL frames to high priority. */ if (eh->ether_type == htons(ETHERTYPE_PAE)) { /* NB: mark so others don't need to check header */ m->m_flags |= M_EAPOL; ac = WME_AC_VO; goto done; } /* * Non-qos traffic goes to BE. */ if ((ni->ni_flags & IEEE80211_NODE_QOS) == 0) { ac = WME_AC_BE; goto done; } /* * If node has a vlan tag then all traffic * to it must have a matching tag. */ v_wme_ac = 0; if (ni->ni_vlan != 0) { if ((m->m_flags & M_VLANTAG) == 0) { IEEE80211_NODE_STAT(ni, tx_novlantag); return 1; } if (EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) != EVL_VLANOFTAG(ni->ni_vlan)) { IEEE80211_NODE_STAT(ni, tx_vlanmismatch); return 1; } /* map vlan priority to AC */ v_wme_ac = TID_TO_WME_AC(EVL_PRIOFTAG(ni->ni_vlan)); } /* XXX m_copydata may be too slow for fast path */ #ifdef INET if (eh->ether_type == htons(ETHERTYPE_IP)) { uint8_t tos; /* * IP frame, map the DSCP bits from the TOS field. */ /* NB: ip header may not be in first mbuf */ m_copydata(m, sizeof(struct ether_header) + offsetof(struct ip, ip_tos), sizeof(tos), &tos); tos >>= 5; /* NB: ECN + low 3 bits of DSCP */ d_wme_ac = TID_TO_WME_AC(tos); } else { #endif /* INET */ #ifdef INET6 if (eh->ether_type == htons(ETHERTYPE_IPV6)) { uint32_t flow; uint8_t tos; /* * IPv6 frame, map the DSCP bits from the traffic class field. */ m_copydata(m, sizeof(struct ether_header) + offsetof(struct ip6_hdr, ip6_flow), sizeof(flow), (caddr_t) &flow); tos = (uint8_t)(ntohl(flow) >> 20); tos >>= 5; /* NB: ECN + low 3 bits of DSCP */ d_wme_ac = TID_TO_WME_AC(tos); } else { #endif /* INET6 */ d_wme_ac = WME_AC_BE; #ifdef INET6 } #endif #ifdef INET } #endif /* * Use highest priority AC. */ if (v_wme_ac > d_wme_ac) ac = v_wme_ac; else ac = d_wme_ac; /* * Apply ACM policy. */ if (ni->ni_vap->iv_opmode == IEEE80211_M_STA) { static const int acmap[4] = { WME_AC_BK, /* WME_AC_BE */ WME_AC_BK, /* WME_AC_BK */ WME_AC_BE, /* WME_AC_VI */ WME_AC_VI, /* WME_AC_VO */ }; struct ieee80211com *ic = ni->ni_ic; while (ac != WME_AC_BK && ic->ic_wme.wme_wmeBssChanParams.cap_wmeParams[ac].wmep_acm) ac = acmap[ac]; } done: M_WME_SETAC(m, ac); return 0; } /* * Insure there is sufficient contiguous space to encapsulate the * 802.11 data frame. If room isn't already there, arrange for it. * Drivers and cipher modules assume we have done the necessary work * and fail rudely if they don't find the space they need. */ struct mbuf * ieee80211_mbuf_adjust(struct ieee80211vap *vap, int hdrsize, struct ieee80211_key *key, struct mbuf *m) { #define TO_BE_RECLAIMED (sizeof(struct ether_header) - sizeof(struct llc)) int needed_space = vap->iv_ic->ic_headroom + hdrsize; if (key != NULL) { /* XXX belongs in crypto code? */ needed_space += key->wk_cipher->ic_header; /* XXX frags */ /* * When crypto is being done in the host we must insure * the data are writable for the cipher routines; clone * a writable mbuf chain. * XXX handle SWMIC specially */ if (key->wk_flags & (IEEE80211_KEY_SWENCRYPT|IEEE80211_KEY_SWENMIC)) { m = m_unshare(m, M_NOWAIT); if (m == NULL) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, "%s: cannot get writable mbuf\n", __func__); vap->iv_stats.is_tx_nobuf++; /* XXX new stat */ return NULL; } } } /* * We know we are called just before stripping an Ethernet * header and prepending an LLC header. This means we know * there will be * sizeof(struct ether_header) - sizeof(struct llc) * bytes recovered to which we need additional space for the * 802.11 header and any crypto header. */ /* XXX check trailing space and copy instead? */ if (M_LEADINGSPACE(m) < needed_space - TO_BE_RECLAIMED) { struct mbuf *n = m_gethdr(M_NOWAIT, m->m_type); if (n == NULL) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, "%s: cannot expand storage\n", __func__); vap->iv_stats.is_tx_nobuf++; m_freem(m); return NULL; } KASSERT(needed_space <= MHLEN, ("not enough room, need %u got %d\n", needed_space, MHLEN)); /* * Setup new mbuf to have leading space to prepend the * 802.11 header and any crypto header bits that are * required (the latter are added when the driver calls * back to ieee80211_crypto_encap to do crypto encapsulation). */ /* NB: must be first 'cuz it clobbers m_data */ m_move_pkthdr(n, m); n->m_len = 0; /* NB: m_gethdr does not set */ n->m_data += needed_space; /* * Pull up Ethernet header to create the expected layout. * We could use m_pullup but that's overkill (i.e. we don't * need the actual data) and it cannot fail so do it inline * for speed. */ /* NB: struct ether_header is known to be contiguous */ n->m_len += sizeof(struct ether_header); m->m_len -= sizeof(struct ether_header); m->m_data += sizeof(struct ether_header); /* * Replace the head of the chain. */ n->m_next = m; m = n; } return m; #undef TO_BE_RECLAIMED } /* * Return the transmit key to use in sending a unicast frame. * If a unicast key is set we use that. When no unicast key is set * we fall back to the default transmit key. */ static __inline struct ieee80211_key * ieee80211_crypto_getucastkey(struct ieee80211vap *vap, struct ieee80211_node *ni) { if (IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)) { if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE || IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey])) return NULL; return &vap->iv_nw_keys[vap->iv_def_txkey]; } else { return &ni->ni_ucastkey; } } /* * Return the transmit key to use in sending a multicast frame. * Multicast traffic always uses the group key which is installed as * the default tx key. */ static __inline struct ieee80211_key * ieee80211_crypto_getmcastkey(struct ieee80211vap *vap, struct ieee80211_node *ni) { if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE || IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey])) return NULL; return &vap->iv_nw_keys[vap->iv_def_txkey]; } /* * Encapsulate an outbound data frame. The mbuf chain is updated. * If an error is encountered NULL is returned. The caller is required * to provide a node reference and pullup the ethernet header in the * first mbuf. * * NB: Packet is assumed to be processed by ieee80211_classify which * marked EAPOL frames w/ M_EAPOL. */ struct mbuf * ieee80211_encap(struct ieee80211vap *vap, struct ieee80211_node *ni, struct mbuf *m) { #define WH4(wh) ((struct ieee80211_frame_addr4 *)(wh)) #define MC01(mc) ((struct ieee80211_meshcntl_ae01 *)mc) struct ieee80211com *ic = ni->ni_ic; #ifdef IEEE80211_SUPPORT_MESH struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_meshcntl_ae10 *mc; struct ieee80211_mesh_route *rt = NULL; int dir = -1; #endif struct ether_header eh; struct ieee80211_frame *wh; struct ieee80211_key *key; struct llc *llc; int hdrsize, hdrspace, datalen, addqos, txfrag, is4addr; ieee80211_seq seqno; int meshhdrsize, meshae; uint8_t *qos; int is_amsdu = 0; IEEE80211_TX_LOCK_ASSERT(ic); /* * Copy existing Ethernet header to a safe place. The * rest of the code assumes it's ok to strip it when * reorganizing state for the final encapsulation. */ KASSERT(m->m_len >= sizeof(eh), ("no ethernet header!")); ETHER_HEADER_COPY(&eh, mtod(m, caddr_t)); /* * Insure space for additional headers. First identify * transmit key to use in calculating any buffer adjustments * required. This is also used below to do privacy * encapsulation work. Then calculate the 802.11 header * size and any padding required by the driver. * * Note key may be NULL if we fall back to the default * transmit key and that is not set. In that case the * buffer may not be expanded as needed by the cipher * routines, but they will/should discard it. */ if (vap->iv_flags & IEEE80211_F_PRIVACY) { if (vap->iv_opmode == IEEE80211_M_STA || !IEEE80211_IS_MULTICAST(eh.ether_dhost) || (vap->iv_opmode == IEEE80211_M_WDS && (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY))) key = ieee80211_crypto_getucastkey(vap, ni); else key = ieee80211_crypto_getmcastkey(vap, ni); if (key == NULL && (m->m_flags & M_EAPOL) == 0) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, eh.ether_dhost, "no default transmit key (%s) deftxkey %u", __func__, vap->iv_def_txkey); vap->iv_stats.is_tx_nodefkey++; goto bad; } } else key = NULL; /* * XXX Some ap's don't handle QoS-encapsulated EAPOL * frames so suppress use. This may be an issue if other * ap's require all data frames to be QoS-encapsulated * once negotiated in which case we'll need to make this * configurable. * NB: mesh data frames are QoS. */ addqos = ((ni->ni_flags & (IEEE80211_NODE_QOS|IEEE80211_NODE_HT)) || (vap->iv_opmode == IEEE80211_M_MBSS)) && (m->m_flags & M_EAPOL) == 0; if (addqos) hdrsize = sizeof(struct ieee80211_qosframe); else hdrsize = sizeof(struct ieee80211_frame); #ifdef IEEE80211_SUPPORT_MESH if (vap->iv_opmode == IEEE80211_M_MBSS) { /* * Mesh data frames are encapsulated according to the * rules of Section 11B.8.5 (p.139 of D3.0 spec). * o Group Addressed data (aka multicast) originating * at the local sta are sent w/ 3-address format and * address extension mode 00 * o Individually Addressed data (aka unicast) originating * at the local sta are sent w/ 4-address format and * address extension mode 00 * o Group Addressed data forwarded from a non-mesh sta are * sent w/ 3-address format and address extension mode 01 * o Individually Address data from another sta are sent * w/ 4-address format and address extension mode 10 */ is4addr = 0; /* NB: don't use, disable */ if (!IEEE80211_IS_MULTICAST(eh.ether_dhost)) { rt = ieee80211_mesh_rt_find(vap, eh.ether_dhost); KASSERT(rt != NULL, ("route is NULL")); dir = IEEE80211_FC1_DIR_DSTODS; hdrsize += IEEE80211_ADDR_LEN; if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { if (IEEE80211_ADDR_EQ(rt->rt_mesh_gate, vap->iv_myaddr)) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, eh.ether_dhost, "%s", "trying to send to ourself"); goto bad; } meshae = IEEE80211_MESH_AE_10; meshhdrsize = sizeof(struct ieee80211_meshcntl_ae10); } else { meshae = IEEE80211_MESH_AE_00; meshhdrsize = sizeof(struct ieee80211_meshcntl); } } else { dir = IEEE80211_FC1_DIR_FROMDS; if (!IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr)) { /* proxy group */ meshae = IEEE80211_MESH_AE_01; meshhdrsize = sizeof(struct ieee80211_meshcntl_ae01); } else { /* group */ meshae = IEEE80211_MESH_AE_00; meshhdrsize = sizeof(struct ieee80211_meshcntl); } } } else { #endif /* * 4-address frames need to be generated for: * o packets sent through a WDS vap (IEEE80211_M_WDS) * o packets sent through a vap marked for relaying * (e.g. a station operating with dynamic WDS) */ is4addr = vap->iv_opmode == IEEE80211_M_WDS || ((vap->iv_flags_ext & IEEE80211_FEXT_4ADDR) && !IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr)); if (is4addr) hdrsize += IEEE80211_ADDR_LEN; meshhdrsize = meshae = 0; #ifdef IEEE80211_SUPPORT_MESH } #endif /* * Honor driver DATAPAD requirement. */ if (ic->ic_flags & IEEE80211_F_DATAPAD) hdrspace = roundup(hdrsize, sizeof(uint32_t)); else hdrspace = hdrsize; if (__predict_true((m->m_flags & M_FF) == 0)) { /* * Normal frame. */ m = ieee80211_mbuf_adjust(vap, hdrspace + meshhdrsize, key, m); if (m == NULL) { /* NB: ieee80211_mbuf_adjust handles msgs+statistics */ goto bad; } /* NB: this could be optimized 'cuz of ieee80211_mbuf_adjust */ m_adj(m, sizeof(struct ether_header) - sizeof(struct llc)); llc = mtod(m, struct llc *); llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP; llc->llc_control = LLC_UI; llc->llc_snap.org_code[0] = 0; llc->llc_snap.org_code[1] = 0; llc->llc_snap.org_code[2] = 0; llc->llc_snap.ether_type = eh.ether_type; } else { #ifdef IEEE80211_SUPPORT_SUPERG /* * Aggregated frame. Check if it's for AMSDU or FF. * * XXX TODO: IEEE80211_NODE_AMSDU* isn't implemented * anywhere for some reason. But, since 11n requires * AMSDU RX, we can just assume "11n" == "AMSDU". */ IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, "%s: called; M_FF\n", __func__); if (ieee80211_amsdu_tx_ok(ni)) { m = ieee80211_amsdu_encap(vap, m, hdrspace + meshhdrsize, key); is_amsdu = 1; } else { m = ieee80211_ff_encap(vap, m, hdrspace + meshhdrsize, key); } if (m == NULL) #endif goto bad; } datalen = m->m_pkthdr.len; /* NB: w/o 802.11 header */ M_PREPEND(m, hdrspace + meshhdrsize, M_NOWAIT); if (m == NULL) { vap->iv_stats.is_tx_nobuf++; goto bad; } wh = mtod(m, struct ieee80211_frame *); wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_DATA; *(uint16_t *)wh->i_dur = 0; qos = NULL; /* NB: quiet compiler */ if (is4addr) { wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS; IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr); IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost); IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, eh.ether_shost); } else switch (vap->iv_opmode) { case IEEE80211_M_STA: wh->i_fc[1] = IEEE80211_FC1_DIR_TODS; IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_bssid); IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost); IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost); break; case IEEE80211_M_IBSS: case IEEE80211_M_AHDEMO: wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost); /* * NB: always use the bssid from iv_bss as the * neighbor's may be stale after an ibss merge */ IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_bss->ni_bssid); break; case IEEE80211_M_HOSTAP: wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); IEEE80211_ADDR_COPY(wh->i_addr2, ni->ni_bssid); IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_shost); break; #ifdef IEEE80211_SUPPORT_MESH case IEEE80211_M_MBSS: /* NB: offset by hdrspace to deal with DATAPAD */ mc = (struct ieee80211_meshcntl_ae10 *) (mtod(m, uint8_t *) + hdrspace); wh->i_fc[1] = dir; switch (meshae) { case IEEE80211_MESH_AE_00: /* no proxy */ mc->mc_flags = 0; if (dir == IEEE80211_FC1_DIR_DSTODS) { /* ucast */ IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr); IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost); IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, eh.ether_shost); qos =((struct ieee80211_qosframe_addr4 *) wh)->i_qos; } else if (dir == IEEE80211_FC1_DIR_FROMDS) { /* mcast */ IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_shost); qos = ((struct ieee80211_qosframe *) wh)->i_qos; } break; case IEEE80211_MESH_AE_01: /* mcast, proxy */ wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS; IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost); IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_myaddr); mc->mc_flags = 1; IEEE80211_ADDR_COPY(MC01(mc)->mc_addr4, eh.ether_shost); qos = ((struct ieee80211_qosframe *) wh)->i_qos; break; case IEEE80211_MESH_AE_10: /* ucast, proxy */ KASSERT(rt != NULL, ("route is NULL")); IEEE80211_ADDR_COPY(wh->i_addr1, rt->rt_nexthop); IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); IEEE80211_ADDR_COPY(wh->i_addr3, rt->rt_mesh_gate); IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, vap->iv_myaddr); mc->mc_flags = IEEE80211_MESH_AE_10; IEEE80211_ADDR_COPY(mc->mc_addr5, eh.ether_dhost); IEEE80211_ADDR_COPY(mc->mc_addr6, eh.ether_shost); qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; break; default: KASSERT(0, ("meshae %d", meshae)); break; } mc->mc_ttl = ms->ms_ttl; ms->ms_seq++; le32enc(mc->mc_seq, ms->ms_seq); break; #endif case IEEE80211_M_WDS: /* NB: is4addr should always be true */ default: goto bad; } if (m->m_flags & M_MORE_DATA) wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA; if (addqos) { int ac, tid; if (is4addr) { qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; /* NB: mesh case handled earlier */ } else if (vap->iv_opmode != IEEE80211_M_MBSS) qos = ((struct ieee80211_qosframe *) wh)->i_qos; ac = M_WME_GETAC(m); /* map from access class/queue to 11e header priorty value */ tid = WME_AC_TO_TID(ac); qos[0] = tid & IEEE80211_QOS_TID; if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[ac].wmep_noackPolicy) qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK; #ifdef IEEE80211_SUPPORT_MESH if (vap->iv_opmode == IEEE80211_M_MBSS) qos[1] = IEEE80211_QOS_MC; else #endif qos[1] = 0; wh->i_fc[0] |= IEEE80211_FC0_SUBTYPE_QOS; /* * If this is an A-MSDU then ensure we set the * relevant field. */ if (is_amsdu) qos[0] |= IEEE80211_QOS_AMSDU; if ((m->m_flags & M_AMPDU_MPDU) == 0) { /* * NB: don't assign a sequence # to potential * aggregates; we expect this happens at the * point the frame comes off any aggregation q * as otherwise we may introduce holes in the * BA sequence space and/or make window accouting * more difficult. * * XXX may want to control this with a driver * capability; this may also change when we pull * aggregation up into net80211 */ seqno = ni->ni_txseqs[tid]++; *(uint16_t *)wh->i_seq = htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); M_SEQNO_SET(m, seqno); } } else { seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++; *(uint16_t *)wh->i_seq = htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); M_SEQNO_SET(m, seqno); /* * XXX TODO: we shouldn't allow EAPOL, etc that would * be forced to be non-QoS traffic to be A-MSDU encapsulated. */ if (is_amsdu) printf("%s: XXX ERROR: is_amsdu set; not QoS!\n", __func__); } /* check if xmit fragmentation is required */ txfrag = (m->m_pkthdr.len > vap->iv_fragthreshold && !IEEE80211_IS_MULTICAST(wh->i_addr1) && (vap->iv_caps & IEEE80211_C_TXFRAG) && (m->m_flags & (M_FF | M_AMPDU_MPDU)) == 0); if (key != NULL) { /* * IEEE 802.1X: send EAPOL frames always in the clear. * WPA/WPA2: encrypt EAPOL keys when pairwise keys are set. */ if ((m->m_flags & M_EAPOL) == 0 || ((vap->iv_flags & IEEE80211_F_WPA) && (vap->iv_opmode == IEEE80211_M_STA ? !IEEE80211_KEY_UNDEFINED(key) : !IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)))) { wh->i_fc[1] |= IEEE80211_FC1_PROTECTED; if (!ieee80211_crypto_enmic(vap, key, m, txfrag)) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, eh.ether_dhost, "%s", "enmic failed, discard frame"); vap->iv_stats.is_crypto_enmicfail++; goto bad; } } } if (txfrag && !ieee80211_fragment(vap, m, hdrsize, key != NULL ? key->wk_cipher->ic_header : 0, vap->iv_fragthreshold)) goto bad; m->m_flags |= M_ENCAP; /* mark encapsulated */ IEEE80211_NODE_STAT(ni, tx_data); if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { IEEE80211_NODE_STAT(ni, tx_mcast); m->m_flags |= M_MCAST; } else IEEE80211_NODE_STAT(ni, tx_ucast); IEEE80211_NODE_STAT_ADD(ni, tx_bytes, datalen); return m; bad: if (m != NULL) m_freem(m); return NULL; #undef WH4 #undef MC01 } void ieee80211_free_mbuf(struct mbuf *m) { struct mbuf *next; if (m == NULL) return; do { next = m->m_nextpkt; m->m_nextpkt = NULL; m_freem(m); } while ((m = next) != NULL); } /* * Fragment the frame according to the specified mtu. * The size of the 802.11 header (w/o padding) is provided * so we don't need to recalculate it. We create a new * mbuf for each fragment and chain it through m_nextpkt; * we might be able to optimize this by reusing the original * packet's mbufs but that is significantly more complicated. */ static int ieee80211_fragment(struct ieee80211vap *vap, struct mbuf *m0, u_int hdrsize, u_int ciphdrsize, u_int mtu) { struct ieee80211com *ic = vap->iv_ic; struct ieee80211_frame *wh, *whf; struct mbuf *m, *prev; u_int totalhdrsize, fragno, fragsize, off, remainder, payload; u_int hdrspace; KASSERT(m0->m_nextpkt == NULL, ("mbuf already chained?")); KASSERT(m0->m_pkthdr.len > mtu, ("pktlen %u mtu %u", m0->m_pkthdr.len, mtu)); /* * Honor driver DATAPAD requirement. */ if (ic->ic_flags & IEEE80211_F_DATAPAD) hdrspace = roundup(hdrsize, sizeof(uint32_t)); else hdrspace = hdrsize; wh = mtod(m0, struct ieee80211_frame *); /* NB: mark the first frag; it will be propagated below */ wh->i_fc[1] |= IEEE80211_FC1_MORE_FRAG; totalhdrsize = hdrspace + ciphdrsize; fragno = 1; off = mtu - ciphdrsize; remainder = m0->m_pkthdr.len - off; prev = m0; do { fragsize = totalhdrsize + remainder; if (fragsize > mtu) fragsize = mtu; /* XXX fragsize can be >2048! */ KASSERT(fragsize < MCLBYTES, ("fragment size %u too big!", fragsize)); if (fragsize > MHLEN) m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); else m = m_gethdr(M_NOWAIT, MT_DATA); if (m == NULL) goto bad; /* leave room to prepend any cipher header */ m_align(m, fragsize - ciphdrsize); /* * Form the header in the fragment. Note that since * we mark the first fragment with the MORE_FRAG bit * it automatically is propagated to each fragment; we * need only clear it on the last fragment (done below). * NB: frag 1+ dont have Mesh Control field present. */ whf = mtod(m, struct ieee80211_frame *); memcpy(whf, wh, hdrsize); #ifdef IEEE80211_SUPPORT_MESH if (vap->iv_opmode == IEEE80211_M_MBSS) { if (IEEE80211_IS_DSTODS(wh)) ((struct ieee80211_qosframe_addr4 *) whf)->i_qos[1] &= ~IEEE80211_QOS_MC; else ((struct ieee80211_qosframe *) whf)->i_qos[1] &= ~IEEE80211_QOS_MC; } #endif *(uint16_t *)&whf->i_seq[0] |= htole16( (fragno & IEEE80211_SEQ_FRAG_MASK) << IEEE80211_SEQ_FRAG_SHIFT); fragno++; payload = fragsize - totalhdrsize; /* NB: destination is known to be contiguous */ m_copydata(m0, off, payload, mtod(m, uint8_t *) + hdrspace); m->m_len = hdrspace + payload; m->m_pkthdr.len = hdrspace + payload; m->m_flags |= M_FRAG; /* chain up the fragment */ prev->m_nextpkt = m; prev = m; /* deduct fragment just formed */ remainder -= payload; off += payload; } while (remainder != 0); /* set the last fragment */ m->m_flags |= M_LASTFRAG; whf->i_fc[1] &= ~IEEE80211_FC1_MORE_FRAG; /* strip first mbuf now that everything has been copied */ m_adj(m0, -(m0->m_pkthdr.len - (mtu - ciphdrsize))); m0->m_flags |= M_FIRSTFRAG | M_FRAG; vap->iv_stats.is_tx_fragframes++; vap->iv_stats.is_tx_frags += fragno-1; return 1; bad: /* reclaim fragments but leave original frame for caller to free */ ieee80211_free_mbuf(m0->m_nextpkt); m0->m_nextpkt = NULL; return 0; } /* * Add a supported rates element id to a frame. */ uint8_t * ieee80211_add_rates(uint8_t *frm, const struct ieee80211_rateset *rs) { int nrates; *frm++ = IEEE80211_ELEMID_RATES; nrates = rs->rs_nrates; if (nrates > IEEE80211_RATE_SIZE) nrates = IEEE80211_RATE_SIZE; *frm++ = nrates; memcpy(frm, rs->rs_rates, nrates); return frm + nrates; } /* * Add an extended supported rates element id to a frame. */ uint8_t * ieee80211_add_xrates(uint8_t *frm, const struct ieee80211_rateset *rs) { /* * Add an extended supported rates element if operating in 11g mode. */ if (rs->rs_nrates > IEEE80211_RATE_SIZE) { int nrates = rs->rs_nrates - IEEE80211_RATE_SIZE; *frm++ = IEEE80211_ELEMID_XRATES; *frm++ = nrates; memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates); frm += nrates; } return frm; } /* * Add an ssid element to a frame. */ uint8_t * ieee80211_add_ssid(uint8_t *frm, const uint8_t *ssid, u_int len) { *frm++ = IEEE80211_ELEMID_SSID; *frm++ = len; memcpy(frm, ssid, len); return frm + len; } /* * Add an erp element to a frame. */ static uint8_t * ieee80211_add_erp(uint8_t *frm, struct ieee80211com *ic) { uint8_t erp; *frm++ = IEEE80211_ELEMID_ERP; *frm++ = 1; erp = 0; if (ic->ic_nonerpsta != 0) erp |= IEEE80211_ERP_NON_ERP_PRESENT; if (ic->ic_flags & IEEE80211_F_USEPROT) erp |= IEEE80211_ERP_USE_PROTECTION; if (ic->ic_flags & IEEE80211_F_USEBARKER) erp |= IEEE80211_ERP_LONG_PREAMBLE; *frm++ = erp; return frm; } /* * Add a CFParams element to a frame. */ static uint8_t * ieee80211_add_cfparms(uint8_t *frm, struct ieee80211com *ic) { #define ADDSHORT(frm, v) do { \ le16enc(frm, v); \ frm += 2; \ } while (0) *frm++ = IEEE80211_ELEMID_CFPARMS; *frm++ = 6; *frm++ = 0; /* CFP count */ *frm++ = 2; /* CFP period */ ADDSHORT(frm, 0); /* CFP MaxDuration (TU) */ ADDSHORT(frm, 0); /* CFP CurRemaining (TU) */ return frm; #undef ADDSHORT } static __inline uint8_t * add_appie(uint8_t *frm, const struct ieee80211_appie *ie) { memcpy(frm, ie->ie_data, ie->ie_len); return frm + ie->ie_len; } static __inline uint8_t * add_ie(uint8_t *frm, const uint8_t *ie) { memcpy(frm, ie, 2 + ie[1]); return frm + 2 + ie[1]; } #define WME_OUI_BYTES 0x00, 0x50, 0xf2 /* * Add a WME information element to a frame. */ uint8_t * ieee80211_add_wme_info(uint8_t *frm, struct ieee80211_wme_state *wme) { static const struct ieee80211_wme_info info = { .wme_id = IEEE80211_ELEMID_VENDOR, .wme_len = sizeof(struct ieee80211_wme_info) - 2, .wme_oui = { WME_OUI_BYTES }, .wme_type = WME_OUI_TYPE, .wme_subtype = WME_INFO_OUI_SUBTYPE, .wme_version = WME_VERSION, .wme_info = 0, }; memcpy(frm, &info, sizeof(info)); return frm + sizeof(info); } /* * Add a WME parameters element to a frame. */ static uint8_t * ieee80211_add_wme_param(uint8_t *frm, struct ieee80211_wme_state *wme) { #define SM(_v, _f) (((_v) << _f##_S) & _f) #define ADDSHORT(frm, v) do { \ le16enc(frm, v); \ frm += 2; \ } while (0) /* NB: this works 'cuz a param has an info at the front */ static const struct ieee80211_wme_info param = { .wme_id = IEEE80211_ELEMID_VENDOR, .wme_len = sizeof(struct ieee80211_wme_param) - 2, .wme_oui = { WME_OUI_BYTES }, .wme_type = WME_OUI_TYPE, .wme_subtype = WME_PARAM_OUI_SUBTYPE, .wme_version = WME_VERSION, }; int i; memcpy(frm, ¶m, sizeof(param)); frm += __offsetof(struct ieee80211_wme_info, wme_info); *frm++ = wme->wme_bssChanParams.cap_info; /* AC info */ *frm++ = 0; /* reserved field */ for (i = 0; i < WME_NUM_AC; i++) { const struct wmeParams *ac = &wme->wme_bssChanParams.cap_wmeParams[i]; *frm++ = SM(i, WME_PARAM_ACI) | SM(ac->wmep_acm, WME_PARAM_ACM) | SM(ac->wmep_aifsn, WME_PARAM_AIFSN) ; *frm++ = SM(ac->wmep_logcwmax, WME_PARAM_LOGCWMAX) | SM(ac->wmep_logcwmin, WME_PARAM_LOGCWMIN) ; ADDSHORT(frm, ac->wmep_txopLimit); } return frm; #undef SM #undef ADDSHORT } #undef WME_OUI_BYTES /* * Add an 11h Power Constraint element to a frame. */ static uint8_t * ieee80211_add_powerconstraint(uint8_t *frm, struct ieee80211vap *vap) { const struct ieee80211_channel *c = vap->iv_bss->ni_chan; /* XXX per-vap tx power limit? */ int8_t limit = vap->iv_ic->ic_txpowlimit / 2; frm[0] = IEEE80211_ELEMID_PWRCNSTR; frm[1] = 1; frm[2] = c->ic_maxregpower > limit ? c->ic_maxregpower - limit : 0; return frm + 3; } /* * Add an 11h Power Capability element to a frame. */ static uint8_t * ieee80211_add_powercapability(uint8_t *frm, const struct ieee80211_channel *c) { frm[0] = IEEE80211_ELEMID_PWRCAP; frm[1] = 2; frm[2] = c->ic_minpower; frm[3] = c->ic_maxpower; return frm + 4; } /* * Add an 11h Supported Channels element to a frame. */ static uint8_t * ieee80211_add_supportedchannels(uint8_t *frm, struct ieee80211com *ic) { static const int ielen = 26; frm[0] = IEEE80211_ELEMID_SUPPCHAN; frm[1] = ielen; /* XXX not correct */ memcpy(frm+2, ic->ic_chan_avail, ielen); return frm + 2 + ielen; } /* * Add an 11h Quiet time element to a frame. */ static uint8_t * ieee80211_add_quiet(uint8_t *frm, struct ieee80211vap *vap) { struct ieee80211_quiet_ie *quiet = (struct ieee80211_quiet_ie *) frm; quiet->quiet_ie = IEEE80211_ELEMID_QUIET; quiet->len = 6; if (vap->iv_quiet_count_value == 1) vap->iv_quiet_count_value = vap->iv_quiet_count; else if (vap->iv_quiet_count_value > 1) vap->iv_quiet_count_value--; if (vap->iv_quiet_count_value == 0) { /* value 0 is reserved as per 802.11h standerd */ vap->iv_quiet_count_value = 1; } quiet->tbttcount = vap->iv_quiet_count_value; quiet->period = vap->iv_quiet_period; quiet->duration = htole16(vap->iv_quiet_duration); quiet->offset = htole16(vap->iv_quiet_offset); return frm + sizeof(*quiet); } /* * Add an 11h Channel Switch Announcement element to a frame. * Note that we use the per-vap CSA count to adjust the global * counter so we can use this routine to form probe response * frames and get the current count. */ static uint8_t * ieee80211_add_csa(uint8_t *frm, struct ieee80211vap *vap) { struct ieee80211com *ic = vap->iv_ic; struct ieee80211_csa_ie *csa = (struct ieee80211_csa_ie *) frm; csa->csa_ie = IEEE80211_ELEMID_CSA; csa->csa_len = 3; csa->csa_mode = 1; /* XXX force quiet on channel */ csa->csa_newchan = ieee80211_chan2ieee(ic, ic->ic_csa_newchan); csa->csa_count = ic->ic_csa_count - vap->iv_csa_count; return frm + sizeof(*csa); } /* * Add an 11h country information element to a frame. */ static uint8_t * ieee80211_add_countryie(uint8_t *frm, struct ieee80211com *ic) { if (ic->ic_countryie == NULL || ic->ic_countryie_chan != ic->ic_bsschan) { /* * Handle lazy construction of ie. This is done on * first use and after a channel change that requires * re-calculation. */ if (ic->ic_countryie != NULL) IEEE80211_FREE(ic->ic_countryie, M_80211_NODE_IE); ic->ic_countryie = ieee80211_alloc_countryie(ic); if (ic->ic_countryie == NULL) return frm; ic->ic_countryie_chan = ic->ic_bsschan; } return add_appie(frm, ic->ic_countryie); } uint8_t * ieee80211_add_wpa(uint8_t *frm, const struct ieee80211vap *vap) { if (vap->iv_flags & IEEE80211_F_WPA1 && vap->iv_wpa_ie != NULL) return (add_ie(frm, vap->iv_wpa_ie)); else { /* XXX else complain? */ return (frm); } } uint8_t * ieee80211_add_rsn(uint8_t *frm, const struct ieee80211vap *vap) { if (vap->iv_flags & IEEE80211_F_WPA2 && vap->iv_rsn_ie != NULL) return (add_ie(frm, vap->iv_rsn_ie)); else { /* XXX else complain? */ return (frm); } } uint8_t * ieee80211_add_qos(uint8_t *frm, const struct ieee80211_node *ni) { if (ni->ni_flags & IEEE80211_NODE_QOS) { *frm++ = IEEE80211_ELEMID_QOS; *frm++ = 1; *frm++ = 0; } return (frm); } /* * Send a probe request frame with the specified ssid * and any optional information element data. */ int ieee80211_send_probereq(struct ieee80211_node *ni, const uint8_t sa[IEEE80211_ADDR_LEN], const uint8_t da[IEEE80211_ADDR_LEN], const uint8_t bssid[IEEE80211_ADDR_LEN], const uint8_t *ssid, size_t ssidlen) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; const struct ieee80211_txparam *tp; struct ieee80211_bpf_params params; struct ieee80211_frame *wh; const struct ieee80211_rateset *rs; struct mbuf *m; uint8_t *frm; int ret; if (vap->iv_state == IEEE80211_S_CAC) { IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, "block %s frame in CAC state", "probe request"); vap->iv_stats.is_tx_badstate++; return EIO; /* XXX */ } /* * Hold a reference on the node so it doesn't go away until after * the xmit is complete all the way in the driver. On error we * will remove our reference. */ IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); ieee80211_ref_node(ni); /* * prreq frame format * [tlv] ssid * [tlv] supported rates * [tlv] RSN (optional) * [tlv] extended supported rates * [tlv] WPA (optional) * [tlv] user-specified ie's */ m = ieee80211_getmgtframe(&frm, ic->ic_headroom + sizeof(struct ieee80211_frame), 2 + IEEE80211_NWID_LEN + 2 + IEEE80211_RATE_SIZE + sizeof(struct ieee80211_ie_wpa) + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) + sizeof(struct ieee80211_ie_wpa) + (vap->iv_appie_probereq != NULL ? vap->iv_appie_probereq->ie_len : 0) ); if (m == NULL) { vap->iv_stats.is_tx_nobuf++; ieee80211_free_node(ni); return ENOMEM; } frm = ieee80211_add_ssid(frm, ssid, ssidlen); rs = ieee80211_get_suprates(ic, ic->ic_curchan); frm = ieee80211_add_rates(frm, rs); frm = ieee80211_add_rsn(frm, vap); frm = ieee80211_add_xrates(frm, rs); frm = ieee80211_add_wpa(frm, vap); if (vap->iv_appie_probereq != NULL) frm = add_appie(frm, vap->iv_appie_probereq); m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); KASSERT(M_LEADINGSPACE(m) >= sizeof(struct ieee80211_frame), ("leading space %zd", M_LEADINGSPACE(m))); M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); if (m == NULL) { /* NB: cannot happen */ ieee80211_free_node(ni); return ENOMEM; } IEEE80211_TX_LOCK(ic); wh = mtod(m, struct ieee80211_frame *); ieee80211_send_setup(ni, m, IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ, IEEE80211_NONQOS_TID, sa, da, bssid); /* XXX power management? */ m->m_flags |= M_ENCAP; /* mark encapsulated */ M_WME_SETAC(m, WME_AC_BE); IEEE80211_NODE_STAT(ni, tx_probereq); IEEE80211_NODE_STAT(ni, tx_mgmt); IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, "send probe req on channel %u bssid %s ssid \"%.*s\"\n", ieee80211_chan2ieee(ic, ic->ic_curchan), ether_sprintf(bssid), ssidlen, ssid); memset(¶ms, 0, sizeof(params)); params.ibp_pri = M_WME_GETAC(m); tp = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; params.ibp_rate0 = tp->mgmtrate; if (IEEE80211_IS_MULTICAST(da)) { params.ibp_flags |= IEEE80211_BPF_NOACK; params.ibp_try0 = 1; } else params.ibp_try0 = tp->maxretry; params.ibp_power = ni->ni_txpower; ret = ieee80211_raw_output(vap, ni, m, ¶ms); IEEE80211_TX_UNLOCK(ic); return (ret); } /* * Calculate capability information for mgt frames. */ uint16_t ieee80211_getcapinfo(struct ieee80211vap *vap, struct ieee80211_channel *chan) { struct ieee80211com *ic = vap->iv_ic; uint16_t capinfo; KASSERT(vap->iv_opmode != IEEE80211_M_STA, ("station mode")); if (vap->iv_opmode == IEEE80211_M_HOSTAP) capinfo = IEEE80211_CAPINFO_ESS; else if (vap->iv_opmode == IEEE80211_M_IBSS) capinfo = IEEE80211_CAPINFO_IBSS; else capinfo = 0; if (vap->iv_flags & IEEE80211_F_PRIVACY) capinfo |= IEEE80211_CAPINFO_PRIVACY; if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && IEEE80211_IS_CHAN_2GHZ(chan)) capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; if (ic->ic_flags & IEEE80211_F_SHSLOT) capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; if (IEEE80211_IS_CHAN_5GHZ(chan) && (vap->iv_flags & IEEE80211_F_DOTH)) capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT; return capinfo; } /* * Send a management frame. The node is for the destination (or ic_bss * when in station mode). Nodes other than ic_bss have their reference * count bumped to reflect our use for an indeterminant time. */ int ieee80211_send_mgmt(struct ieee80211_node *ni, int type, int arg) { #define HTFLAGS (IEEE80211_NODE_HT | IEEE80211_NODE_HTCOMPAT) #define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0) struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; struct ieee80211_node *bss = vap->iv_bss; struct ieee80211_bpf_params params; struct mbuf *m; uint8_t *frm; uint16_t capinfo; int has_challenge, is_shared_key, ret, status; KASSERT(ni != NULL, ("null node")); /* * Hold a reference on the node so it doesn't go away until after * the xmit is complete all the way in the driver. On error we * will remove our reference. */ IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); ieee80211_ref_node(ni); memset(¶ms, 0, sizeof(params)); switch (type) { case IEEE80211_FC0_SUBTYPE_AUTH: status = arg >> 16; arg &= 0xffff; has_challenge = ((arg == IEEE80211_AUTH_SHARED_CHALLENGE || arg == IEEE80211_AUTH_SHARED_RESPONSE) && ni->ni_challenge != NULL); /* * Deduce whether we're doing open authentication or * shared key authentication. We do the latter if * we're in the middle of a shared key authentication * handshake or if we're initiating an authentication * request and configured to use shared key. */ is_shared_key = has_challenge || arg >= IEEE80211_AUTH_SHARED_RESPONSE || (arg == IEEE80211_AUTH_SHARED_REQUEST && bss->ni_authmode == IEEE80211_AUTH_SHARED); m = ieee80211_getmgtframe(&frm, ic->ic_headroom + sizeof(struct ieee80211_frame), 3 * sizeof(uint16_t) + (has_challenge && status == IEEE80211_STATUS_SUCCESS ? sizeof(uint16_t)+IEEE80211_CHALLENGE_LEN : 0) ); if (m == NULL) senderr(ENOMEM, is_tx_nobuf); ((uint16_t *)frm)[0] = (is_shared_key) ? htole16(IEEE80211_AUTH_ALG_SHARED) : htole16(IEEE80211_AUTH_ALG_OPEN); ((uint16_t *)frm)[1] = htole16(arg); /* sequence number */ ((uint16_t *)frm)[2] = htole16(status);/* status */ if (has_challenge && status == IEEE80211_STATUS_SUCCESS) { ((uint16_t *)frm)[3] = htole16((IEEE80211_CHALLENGE_LEN << 8) | IEEE80211_ELEMID_CHALLENGE); memcpy(&((uint16_t *)frm)[4], ni->ni_challenge, IEEE80211_CHALLENGE_LEN); m->m_pkthdr.len = m->m_len = 4 * sizeof(uint16_t) + IEEE80211_CHALLENGE_LEN; if (arg == IEEE80211_AUTH_SHARED_RESPONSE) { IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, "request encrypt frame (%s)", __func__); /* mark frame for encryption */ params.ibp_flags |= IEEE80211_BPF_CRYPTO; } } else m->m_pkthdr.len = m->m_len = 3 * sizeof(uint16_t); /* XXX not right for shared key */ if (status == IEEE80211_STATUS_SUCCESS) IEEE80211_NODE_STAT(ni, tx_auth); else IEEE80211_NODE_STAT(ni, tx_auth_fail); if (vap->iv_opmode == IEEE80211_M_STA) ieee80211_add_callback(m, ieee80211_tx_mgt_cb, (void *) vap->iv_state); break; case IEEE80211_FC0_SUBTYPE_DEAUTH: IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, "send station deauthenticate (reason: %d (%s))", arg, ieee80211_reason_to_string(arg)); m = ieee80211_getmgtframe(&frm, ic->ic_headroom + sizeof(struct ieee80211_frame), sizeof(uint16_t)); if (m == NULL) senderr(ENOMEM, is_tx_nobuf); *(uint16_t *)frm = htole16(arg); /* reason */ m->m_pkthdr.len = m->m_len = sizeof(uint16_t); IEEE80211_NODE_STAT(ni, tx_deauth); IEEE80211_NODE_STAT_SET(ni, tx_deauth_code, arg); ieee80211_node_unauthorize(ni); /* port closed */ break; case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: /* * asreq frame format * [2] capability information * [2] listen interval * [6*] current AP address (reassoc only) * [tlv] ssid * [tlv] supported rates * [tlv] extended supported rates * [4] power capability (optional) * [28] supported channels (optional) * [tlv] HT capabilities * [tlv] WME (optional) * [tlv] Vendor OUI HT capabilities (optional) * [tlv] Atheros capabilities (if negotiated) * [tlv] AppIE's (optional) */ m = ieee80211_getmgtframe(&frm, ic->ic_headroom + sizeof(struct ieee80211_frame), sizeof(uint16_t) + sizeof(uint16_t) + IEEE80211_ADDR_LEN + 2 + IEEE80211_NWID_LEN + 2 + IEEE80211_RATE_SIZE + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) + 4 + 2 + 26 + sizeof(struct ieee80211_wme_info) + sizeof(struct ieee80211_ie_htcap) + 4 + sizeof(struct ieee80211_ie_htcap) #ifdef IEEE80211_SUPPORT_SUPERG + sizeof(struct ieee80211_ath_ie) #endif + (vap->iv_appie_wpa != NULL ? vap->iv_appie_wpa->ie_len : 0) + (vap->iv_appie_assocreq != NULL ? vap->iv_appie_assocreq->ie_len : 0) ); if (m == NULL) senderr(ENOMEM, is_tx_nobuf); KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode %u", vap->iv_opmode)); capinfo = IEEE80211_CAPINFO_ESS; if (vap->iv_flags & IEEE80211_F_PRIVACY) capinfo |= IEEE80211_CAPINFO_PRIVACY; /* * NB: Some 11a AP's reject the request when * short premable is set. */ if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) && IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && (ic->ic_caps & IEEE80211_C_SHSLOT)) capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME; if ((ni->ni_capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) && (vap->iv_flags & IEEE80211_F_DOTH)) capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT; *(uint16_t *)frm = htole16(capinfo); frm += 2; KASSERT(bss->ni_intval != 0, ("beacon interval is zero!")); *(uint16_t *)frm = htole16(howmany(ic->ic_lintval, bss->ni_intval)); frm += 2; if (type == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) { IEEE80211_ADDR_COPY(frm, bss->ni_bssid); frm += IEEE80211_ADDR_LEN; } frm = ieee80211_add_ssid(frm, ni->ni_essid, ni->ni_esslen); frm = ieee80211_add_rates(frm, &ni->ni_rates); frm = ieee80211_add_rsn(frm, vap); frm = ieee80211_add_xrates(frm, &ni->ni_rates); if (capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) { frm = ieee80211_add_powercapability(frm, ic->ic_curchan); frm = ieee80211_add_supportedchannels(frm, ic); } /* * Check the channel - we may be using an 11n NIC with an * 11n capable station, but we're configured to be an 11b * channel. */ if ((vap->iv_flags_ht & IEEE80211_FHT_HT) && IEEE80211_IS_CHAN_HT(ni->ni_chan) && ni->ni_ies.htcap_ie != NULL && ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_HTCAP) { frm = ieee80211_add_htcap(frm, ni); } frm = ieee80211_add_wpa(frm, vap); if ((ic->ic_flags & IEEE80211_F_WME) && ni->ni_ies.wme_ie != NULL) frm = ieee80211_add_wme_info(frm, &ic->ic_wme); /* * Same deal - only send HT info if we're on an 11n * capable channel. */ if ((vap->iv_flags_ht & IEEE80211_FHT_HT) && IEEE80211_IS_CHAN_HT(ni->ni_chan) && ni->ni_ies.htcap_ie != NULL && ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_VENDOR) { frm = ieee80211_add_htcap_vendor(frm, ni); } #ifdef IEEE80211_SUPPORT_SUPERG if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS)) { frm = ieee80211_add_ath(frm, IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS), ((vap->iv_flags & IEEE80211_F_WPA) == 0 && ni->ni_authmode != IEEE80211_AUTH_8021X) ? vap->iv_def_txkey : IEEE80211_KEYIX_NONE); } #endif /* IEEE80211_SUPPORT_SUPERG */ if (vap->iv_appie_assocreq != NULL) frm = add_appie(frm, vap->iv_appie_assocreq); m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); ieee80211_add_callback(m, ieee80211_tx_mgt_cb, (void *) vap->iv_state); break; case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: /* * asresp frame format * [2] capability information * [2] status * [2] association ID * [tlv] supported rates * [tlv] extended supported rates * [tlv] HT capabilities (standard, if STA enabled) * [tlv] HT information (standard, if STA enabled) * [tlv] WME (if configured and STA enabled) * [tlv] HT capabilities (vendor OUI, if STA enabled) * [tlv] HT information (vendor OUI, if STA enabled) * [tlv] Atheros capabilities (if STA enabled) * [tlv] AppIE's (optional) */ m = ieee80211_getmgtframe(&frm, ic->ic_headroom + sizeof(struct ieee80211_frame), sizeof(uint16_t) + sizeof(uint16_t) + sizeof(uint16_t) + 2 + IEEE80211_RATE_SIZE + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) + sizeof(struct ieee80211_ie_htcap) + 4 + sizeof(struct ieee80211_ie_htinfo) + 4 + sizeof(struct ieee80211_wme_param) #ifdef IEEE80211_SUPPORT_SUPERG + sizeof(struct ieee80211_ath_ie) #endif + (vap->iv_appie_assocresp != NULL ? vap->iv_appie_assocresp->ie_len : 0) ); if (m == NULL) senderr(ENOMEM, is_tx_nobuf); capinfo = ieee80211_getcapinfo(vap, bss->ni_chan); *(uint16_t *)frm = htole16(capinfo); frm += 2; *(uint16_t *)frm = htole16(arg); /* status */ frm += 2; if (arg == IEEE80211_STATUS_SUCCESS) { *(uint16_t *)frm = htole16(ni->ni_associd); IEEE80211_NODE_STAT(ni, tx_assoc); } else IEEE80211_NODE_STAT(ni, tx_assoc_fail); frm += 2; frm = ieee80211_add_rates(frm, &ni->ni_rates); frm = ieee80211_add_xrates(frm, &ni->ni_rates); /* NB: respond according to what we received */ if ((ni->ni_flags & HTFLAGS) == IEEE80211_NODE_HT) { frm = ieee80211_add_htcap(frm, ni); frm = ieee80211_add_htinfo(frm, ni); } if ((vap->iv_flags & IEEE80211_F_WME) && ni->ni_ies.wme_ie != NULL) frm = ieee80211_add_wme_param(frm, &ic->ic_wme); if ((ni->ni_flags & HTFLAGS) == HTFLAGS) { frm = ieee80211_add_htcap_vendor(frm, ni); frm = ieee80211_add_htinfo_vendor(frm, ni); } #ifdef IEEE80211_SUPPORT_SUPERG if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS)) frm = ieee80211_add_ath(frm, IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS), ((vap->iv_flags & IEEE80211_F_WPA) == 0 && ni->ni_authmode != IEEE80211_AUTH_8021X) ? vap->iv_def_txkey : IEEE80211_KEYIX_NONE); #endif /* IEEE80211_SUPPORT_SUPERG */ if (vap->iv_appie_assocresp != NULL) frm = add_appie(frm, vap->iv_appie_assocresp); m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); break; case IEEE80211_FC0_SUBTYPE_DISASSOC: IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, "send station disassociate (reason: %d (%s))", arg, ieee80211_reason_to_string(arg)); m = ieee80211_getmgtframe(&frm, ic->ic_headroom + sizeof(struct ieee80211_frame), sizeof(uint16_t)); if (m == NULL) senderr(ENOMEM, is_tx_nobuf); *(uint16_t *)frm = htole16(arg); /* reason */ m->m_pkthdr.len = m->m_len = sizeof(uint16_t); IEEE80211_NODE_STAT(ni, tx_disassoc); IEEE80211_NODE_STAT_SET(ni, tx_disassoc_code, arg); break; default: IEEE80211_NOTE(vap, IEEE80211_MSG_ANY, ni, "invalid mgmt frame type %u", type); senderr(EINVAL, is_tx_unknownmgt); /* NOTREACHED */ } /* NB: force non-ProbeResp frames to the highest queue */ params.ibp_pri = WME_AC_VO; params.ibp_rate0 = bss->ni_txparms->mgmtrate; /* NB: we know all frames are unicast */ params.ibp_try0 = bss->ni_txparms->maxretry; params.ibp_power = bss->ni_txpower; return ieee80211_mgmt_output(ni, m, type, ¶ms); bad: ieee80211_free_node(ni); return ret; #undef senderr #undef HTFLAGS } /* * Return an mbuf with a probe response frame in it. * Space is left to prepend and 802.11 header at the * front but it's left to the caller to fill in. */ struct mbuf * ieee80211_alloc_proberesp(struct ieee80211_node *bss, int legacy) { struct ieee80211vap *vap = bss->ni_vap; struct ieee80211com *ic = bss->ni_ic; const struct ieee80211_rateset *rs; struct mbuf *m; uint16_t capinfo; uint8_t *frm; /* * probe response frame format * [8] time stamp * [2] beacon interval * [2] cabability information * [tlv] ssid * [tlv] supported rates * [tlv] parameter set (FH/DS) * [tlv] parameter set (IBSS) * [tlv] country (optional) * [3] power control (optional) * [5] channel switch announcement (CSA) (optional) * [tlv] extended rate phy (ERP) * [tlv] extended supported rates * [tlv] RSN (optional) * [tlv] HT capabilities * [tlv] HT information * [tlv] WPA (optional) * [tlv] WME (optional) * [tlv] Vendor OUI HT capabilities (optional) * [tlv] Vendor OUI HT information (optional) * [tlv] Atheros capabilities * [tlv] AppIE's (optional) * [tlv] Mesh ID (MBSS) * [tlv] Mesh Conf (MBSS) */ m = ieee80211_getmgtframe(&frm, ic->ic_headroom + sizeof(struct ieee80211_frame), 8 + sizeof(uint16_t) + sizeof(uint16_t) + 2 + IEEE80211_NWID_LEN + 2 + IEEE80211_RATE_SIZE + 7 /* max(7,3) */ + IEEE80211_COUNTRY_MAX_SIZE + 3 + sizeof(struct ieee80211_csa_ie) + sizeof(struct ieee80211_quiet_ie) + 3 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) + sizeof(struct ieee80211_ie_wpa) + sizeof(struct ieee80211_ie_htcap) + sizeof(struct ieee80211_ie_htinfo) + sizeof(struct ieee80211_ie_wpa) + sizeof(struct ieee80211_wme_param) + 4 + sizeof(struct ieee80211_ie_htcap) + 4 + sizeof(struct ieee80211_ie_htinfo) #ifdef IEEE80211_SUPPORT_SUPERG + sizeof(struct ieee80211_ath_ie) #endif #ifdef IEEE80211_SUPPORT_MESH + 2 + IEEE80211_MESHID_LEN + sizeof(struct ieee80211_meshconf_ie) #endif + (vap->iv_appie_proberesp != NULL ? vap->iv_appie_proberesp->ie_len : 0) ); if (m == NULL) { vap->iv_stats.is_tx_nobuf++; return NULL; } memset(frm, 0, 8); /* timestamp should be filled later */ frm += 8; *(uint16_t *)frm = htole16(bss->ni_intval); frm += 2; capinfo = ieee80211_getcapinfo(vap, bss->ni_chan); *(uint16_t *)frm = htole16(capinfo); frm += 2; frm = ieee80211_add_ssid(frm, bss->ni_essid, bss->ni_esslen); rs = ieee80211_get_suprates(ic, bss->ni_chan); frm = ieee80211_add_rates(frm, rs); if (IEEE80211_IS_CHAN_FHSS(bss->ni_chan)) { *frm++ = IEEE80211_ELEMID_FHPARMS; *frm++ = 5; *frm++ = bss->ni_fhdwell & 0x00ff; *frm++ = (bss->ni_fhdwell >> 8) & 0x00ff; *frm++ = IEEE80211_FH_CHANSET( ieee80211_chan2ieee(ic, bss->ni_chan)); *frm++ = IEEE80211_FH_CHANPAT( ieee80211_chan2ieee(ic, bss->ni_chan)); *frm++ = bss->ni_fhindex; } else { *frm++ = IEEE80211_ELEMID_DSPARMS; *frm++ = 1; *frm++ = ieee80211_chan2ieee(ic, bss->ni_chan); } if (vap->iv_opmode == IEEE80211_M_IBSS) { *frm++ = IEEE80211_ELEMID_IBSSPARMS; *frm++ = 2; *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */ } if ((vap->iv_flags & IEEE80211_F_DOTH) || (vap->iv_flags_ext & IEEE80211_FEXT_DOTD)) frm = ieee80211_add_countryie(frm, ic); if (vap->iv_flags & IEEE80211_F_DOTH) { if (IEEE80211_IS_CHAN_5GHZ(bss->ni_chan)) frm = ieee80211_add_powerconstraint(frm, vap); if (ic->ic_flags & IEEE80211_F_CSAPENDING) frm = ieee80211_add_csa(frm, vap); } if (vap->iv_flags & IEEE80211_F_DOTH) { if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && (vap->iv_flags_ext & IEEE80211_FEXT_DFS)) { if (vap->iv_quiet) frm = ieee80211_add_quiet(frm, vap); } } if (IEEE80211_IS_CHAN_ANYG(bss->ni_chan)) frm = ieee80211_add_erp(frm, ic); frm = ieee80211_add_xrates(frm, rs); frm = ieee80211_add_rsn(frm, vap); /* * NB: legacy 11b clients do not get certain ie's. * The caller identifies such clients by passing * a token in legacy to us. Could expand this to be * any legacy client for stuff like HT ie's. */ if (IEEE80211_IS_CHAN_HT(bss->ni_chan) && legacy != IEEE80211_SEND_LEGACY_11B) { frm = ieee80211_add_htcap(frm, bss); frm = ieee80211_add_htinfo(frm, bss); } frm = ieee80211_add_wpa(frm, vap); if (vap->iv_flags & IEEE80211_F_WME) frm = ieee80211_add_wme_param(frm, &ic->ic_wme); if (IEEE80211_IS_CHAN_HT(bss->ni_chan) && (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) && legacy != IEEE80211_SEND_LEGACY_11B) { frm = ieee80211_add_htcap_vendor(frm, bss); frm = ieee80211_add_htinfo_vendor(frm, bss); } #ifdef IEEE80211_SUPPORT_SUPERG if ((vap->iv_flags & IEEE80211_F_ATHEROS) && legacy != IEEE80211_SEND_LEGACY_11B) frm = ieee80211_add_athcaps(frm, bss); #endif if (vap->iv_appie_proberesp != NULL) frm = add_appie(frm, vap->iv_appie_proberesp); #ifdef IEEE80211_SUPPORT_MESH if (vap->iv_opmode == IEEE80211_M_MBSS) { frm = ieee80211_add_meshid(frm, vap); frm = ieee80211_add_meshconf(frm, vap); } #endif m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); return m; } /* * Send a probe response frame to the specified mac address. * This does not go through the normal mgt frame api so we * can specify the destination address and re-use the bss node * for the sta reference. */ int ieee80211_send_proberesp(struct ieee80211vap *vap, const uint8_t da[IEEE80211_ADDR_LEN], int legacy) { struct ieee80211_node *bss = vap->iv_bss; struct ieee80211com *ic = vap->iv_ic; struct ieee80211_frame *wh; struct mbuf *m; int ret; if (vap->iv_state == IEEE80211_S_CAC) { IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, bss, "block %s frame in CAC state", "probe response"); vap->iv_stats.is_tx_badstate++; return EIO; /* XXX */ } /* * Hold a reference on the node so it doesn't go away until after * the xmit is complete all the way in the driver. On error we * will remove our reference. */ IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, bss, ether_sprintf(bss->ni_macaddr), ieee80211_node_refcnt(bss)+1); ieee80211_ref_node(bss); m = ieee80211_alloc_proberesp(bss, legacy); if (m == NULL) { ieee80211_free_node(bss); return ENOMEM; } M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); KASSERT(m != NULL, ("no room for header")); IEEE80211_TX_LOCK(ic); wh = mtod(m, struct ieee80211_frame *); ieee80211_send_setup(bss, m, IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP, IEEE80211_NONQOS_TID, vap->iv_myaddr, da, bss->ni_bssid); /* XXX power management? */ m->m_flags |= M_ENCAP; /* mark encapsulated */ M_WME_SETAC(m, WME_AC_BE); IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, "send probe resp on channel %u to %s%s\n", ieee80211_chan2ieee(ic, ic->ic_curchan), ether_sprintf(da), legacy ? " " : ""); IEEE80211_NODE_STAT(bss, tx_mgmt); ret = ieee80211_raw_output(vap, bss, m, NULL); IEEE80211_TX_UNLOCK(ic); return (ret); } /* * Allocate and build a RTS (Request To Send) control frame. */ struct mbuf * ieee80211_alloc_rts(struct ieee80211com *ic, const uint8_t ra[IEEE80211_ADDR_LEN], const uint8_t ta[IEEE80211_ADDR_LEN], uint16_t dur) { struct ieee80211_frame_rts *rts; struct mbuf *m; /* XXX honor ic_headroom */ m = m_gethdr(M_NOWAIT, MT_DATA); if (m != NULL) { rts = mtod(m, struct ieee80211_frame_rts *); rts->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_RTS; rts->i_fc[1] = IEEE80211_FC1_DIR_NODS; *(u_int16_t *)rts->i_dur = htole16(dur); IEEE80211_ADDR_COPY(rts->i_ra, ra); IEEE80211_ADDR_COPY(rts->i_ta, ta); m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_rts); } return m; } /* * Allocate and build a CTS (Clear To Send) control frame. */ struct mbuf * ieee80211_alloc_cts(struct ieee80211com *ic, const uint8_t ra[IEEE80211_ADDR_LEN], uint16_t dur) { struct ieee80211_frame_cts *cts; struct mbuf *m; /* XXX honor ic_headroom */ m = m_gethdr(M_NOWAIT, MT_DATA); if (m != NULL) { cts = mtod(m, struct ieee80211_frame_cts *); cts->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_CTS; cts->i_fc[1] = IEEE80211_FC1_DIR_NODS; *(u_int16_t *)cts->i_dur = htole16(dur); IEEE80211_ADDR_COPY(cts->i_ra, ra); m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_cts); } return m; } static void ieee80211_tx_mgt_timeout(void *arg) { struct ieee80211vap *vap = arg; IEEE80211_LOCK(vap->iv_ic); if (vap->iv_state != IEEE80211_S_INIT && (vap->iv_ic->ic_flags & IEEE80211_F_SCAN) == 0) { /* * NB: it's safe to specify a timeout as the reason here; * it'll only be used in the right state. */ ieee80211_new_state_locked(vap, IEEE80211_S_SCAN, IEEE80211_SCAN_FAIL_TIMEOUT); } IEEE80211_UNLOCK(vap->iv_ic); } /* * This is the callback set on net80211-sourced transmitted * authentication request frames. * * This does a couple of things: * * + If the frame transmitted was a success, it schedules a future * event which will transition the interface to scan. * If a state transition _then_ occurs before that event occurs, * said state transition will cancel this callout. * * + If the frame transmit was a failure, it immediately schedules * the transition back to scan. */ static void ieee80211_tx_mgt_cb(struct ieee80211_node *ni, void *arg, int status) { struct ieee80211vap *vap = ni->ni_vap; enum ieee80211_state ostate = (enum ieee80211_state) arg; /* * Frame transmit completed; arrange timer callback. If * transmit was successfuly we wait for response. Otherwise * we arrange an immediate callback instead of doing the * callback directly since we don't know what state the driver * is in (e.g. what locks it is holding). This work should * not be too time-critical and not happen too often so the * added overhead is acceptable. * * XXX what happens if !acked but response shows up before callback? */ if (vap->iv_state == ostate) { callout_reset(&vap->iv_mgtsend, status == 0 ? IEEE80211_TRANS_WAIT*hz : 0, ieee80211_tx_mgt_timeout, vap); } } static void ieee80211_beacon_construct(struct mbuf *m, uint8_t *frm, struct ieee80211_node *ni) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211_beacon_offsets *bo = &vap->iv_bcn_off; struct ieee80211com *ic = ni->ni_ic; struct ieee80211_rateset *rs = &ni->ni_rates; uint16_t capinfo; /* * beacon frame format * [8] time stamp * [2] beacon interval * [2] cabability information * [tlv] ssid * [tlv] supported rates * [3] parameter set (DS) * [8] CF parameter set (optional) * [tlv] parameter set (IBSS/TIM) * [tlv] country (optional) * [3] power control (optional) * [5] channel switch announcement (CSA) (optional) * [tlv] extended rate phy (ERP) * [tlv] extended supported rates * [tlv] RSN parameters * [tlv] HT capabilities * [tlv] HT information * XXX Vendor-specific OIDs (e.g. Atheros) * [tlv] WPA parameters * [tlv] WME parameters * [tlv] Vendor OUI HT capabilities (optional) * [tlv] Vendor OUI HT information (optional) * [tlv] Atheros capabilities (optional) * [tlv] TDMA parameters (optional) * [tlv] Mesh ID (MBSS) * [tlv] Mesh Conf (MBSS) * [tlv] application data (optional) */ memset(bo, 0, sizeof(*bo)); memset(frm, 0, 8); /* XXX timestamp is set by hardware/driver */ frm += 8; *(uint16_t *)frm = htole16(ni->ni_intval); frm += 2; capinfo = ieee80211_getcapinfo(vap, ni->ni_chan); bo->bo_caps = (uint16_t *)frm; *(uint16_t *)frm = htole16(capinfo); frm += 2; *frm++ = IEEE80211_ELEMID_SSID; if ((vap->iv_flags & IEEE80211_F_HIDESSID) == 0) { *frm++ = ni->ni_esslen; memcpy(frm, ni->ni_essid, ni->ni_esslen); frm += ni->ni_esslen; } else *frm++ = 0; frm = ieee80211_add_rates(frm, rs); if (!IEEE80211_IS_CHAN_FHSS(ni->ni_chan)) { *frm++ = IEEE80211_ELEMID_DSPARMS; *frm++ = 1; *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan); } if (ic->ic_flags & IEEE80211_F_PCF) { bo->bo_cfp = frm; frm = ieee80211_add_cfparms(frm, ic); } bo->bo_tim = frm; if (vap->iv_opmode == IEEE80211_M_IBSS) { *frm++ = IEEE80211_ELEMID_IBSSPARMS; *frm++ = 2; *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */ bo->bo_tim_len = 0; } else if (vap->iv_opmode == IEEE80211_M_HOSTAP || vap->iv_opmode == IEEE80211_M_MBSS) { /* TIM IE is the same for Mesh and Hostap */ struct ieee80211_tim_ie *tie = (struct ieee80211_tim_ie *) frm; tie->tim_ie = IEEE80211_ELEMID_TIM; tie->tim_len = 4; /* length */ tie->tim_count = 0; /* DTIM count */ tie->tim_period = vap->iv_dtim_period; /* DTIM period */ tie->tim_bitctl = 0; /* bitmap control */ tie->tim_bitmap[0] = 0; /* Partial Virtual Bitmap */ frm += sizeof(struct ieee80211_tim_ie); bo->bo_tim_len = 1; } bo->bo_tim_trailer = frm; if ((vap->iv_flags & IEEE80211_F_DOTH) || (vap->iv_flags_ext & IEEE80211_FEXT_DOTD)) frm = ieee80211_add_countryie(frm, ic); if (vap->iv_flags & IEEE80211_F_DOTH) { if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) frm = ieee80211_add_powerconstraint(frm, vap); bo->bo_csa = frm; if (ic->ic_flags & IEEE80211_F_CSAPENDING) frm = ieee80211_add_csa(frm, vap); } else bo->bo_csa = frm; if (vap->iv_flags & IEEE80211_F_DOTH) { bo->bo_quiet = frm; if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && (vap->iv_flags_ext & IEEE80211_FEXT_DFS)) { if (vap->iv_quiet) frm = ieee80211_add_quiet(frm,vap); } } else bo->bo_quiet = frm; if (IEEE80211_IS_CHAN_ANYG(ni->ni_chan)) { bo->bo_erp = frm; frm = ieee80211_add_erp(frm, ic); } frm = ieee80211_add_xrates(frm, rs); frm = ieee80211_add_rsn(frm, vap); if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) { frm = ieee80211_add_htcap(frm, ni); bo->bo_htinfo = frm; frm = ieee80211_add_htinfo(frm, ni); } frm = ieee80211_add_wpa(frm, vap); if (vap->iv_flags & IEEE80211_F_WME) { bo->bo_wme = frm; frm = ieee80211_add_wme_param(frm, &ic->ic_wme); } if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT)) { frm = ieee80211_add_htcap_vendor(frm, ni); frm = ieee80211_add_htinfo_vendor(frm, ni); } #ifdef IEEE80211_SUPPORT_SUPERG if (vap->iv_flags & IEEE80211_F_ATHEROS) { bo->bo_ath = frm; frm = ieee80211_add_athcaps(frm, ni); } #endif #ifdef IEEE80211_SUPPORT_TDMA if (vap->iv_caps & IEEE80211_C_TDMA) { bo->bo_tdma = frm; frm = ieee80211_add_tdma(frm, vap); } #endif if (vap->iv_appie_beacon != NULL) { bo->bo_appie = frm; bo->bo_appie_len = vap->iv_appie_beacon->ie_len; frm = add_appie(frm, vap->iv_appie_beacon); } #ifdef IEEE80211_SUPPORT_MESH if (vap->iv_opmode == IEEE80211_M_MBSS) { frm = ieee80211_add_meshid(frm, vap); bo->bo_meshconf = frm; frm = ieee80211_add_meshconf(frm, vap); } #endif bo->bo_tim_trailer_len = frm - bo->bo_tim_trailer; bo->bo_csa_trailer_len = frm - bo->bo_csa; m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); } /* * Allocate a beacon frame and fillin the appropriate bits. */ struct mbuf * ieee80211_beacon_alloc(struct ieee80211_node *ni) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; struct ifnet *ifp = vap->iv_ifp; struct ieee80211_frame *wh; struct mbuf *m; int pktlen; uint8_t *frm; /* * beacon frame format * [8] time stamp * [2] beacon interval * [2] cabability information * [tlv] ssid * [tlv] supported rates * [3] parameter set (DS) * [8] CF parameter set (optional) * [tlv] parameter set (IBSS/TIM) * [tlv] country (optional) * [3] power control (optional) * [5] channel switch announcement (CSA) (optional) * [tlv] extended rate phy (ERP) * [tlv] extended supported rates * [tlv] RSN parameters * [tlv] HT capabilities * [tlv] HT information * [tlv] Vendor OUI HT capabilities (optional) * [tlv] Vendor OUI HT information (optional) * XXX Vendor-specific OIDs (e.g. Atheros) * [tlv] WPA parameters * [tlv] WME parameters * [tlv] TDMA parameters (optional) * [tlv] Mesh ID (MBSS) * [tlv] Mesh Conf (MBSS) * [tlv] application data (optional) * NB: we allocate the max space required for the TIM bitmap. * XXX how big is this? */ pktlen = 8 /* time stamp */ + sizeof(uint16_t) /* beacon interval */ + sizeof(uint16_t) /* capabilities */ + 2 + ni->ni_esslen /* ssid */ + 2 + IEEE80211_RATE_SIZE /* supported rates */ + 2 + 1 /* DS parameters */ + 2 + 6 /* CF parameters */ + 2 + 4 + vap->iv_tim_len /* DTIM/IBSSPARMS */ + IEEE80211_COUNTRY_MAX_SIZE /* country */ + 2 + 1 /* power control */ + sizeof(struct ieee80211_csa_ie) /* CSA */ + sizeof(struct ieee80211_quiet_ie) /* Quiet */ + 2 + 1 /* ERP */ + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) + (vap->iv_caps & IEEE80211_C_WPA ? /* WPA 1+2 */ 2*sizeof(struct ieee80211_ie_wpa) : 0) /* XXX conditional? */ + 4+2*sizeof(struct ieee80211_ie_htcap)/* HT caps */ + 4+2*sizeof(struct ieee80211_ie_htinfo)/* HT info */ + (vap->iv_caps & IEEE80211_C_WME ? /* WME */ sizeof(struct ieee80211_wme_param) : 0) #ifdef IEEE80211_SUPPORT_SUPERG + sizeof(struct ieee80211_ath_ie) /* ATH */ #endif #ifdef IEEE80211_SUPPORT_TDMA + (vap->iv_caps & IEEE80211_C_TDMA ? /* TDMA */ sizeof(struct ieee80211_tdma_param) : 0) #endif #ifdef IEEE80211_SUPPORT_MESH + 2 + ni->ni_meshidlen + sizeof(struct ieee80211_meshconf_ie) #endif + IEEE80211_MAX_APPIE ; m = ieee80211_getmgtframe(&frm, ic->ic_headroom + sizeof(struct ieee80211_frame), pktlen); if (m == NULL) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, "%s: cannot get buf; size %u\n", __func__, pktlen); vap->iv_stats.is_tx_nobuf++; return NULL; } ieee80211_beacon_construct(m, frm, ni); M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); KASSERT(m != NULL, ("no space for 802.11 header?")); wh = mtod(m, struct ieee80211_frame *); wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_BEACON; wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; *(uint16_t *)wh->i_dur = 0; IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr); IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); IEEE80211_ADDR_COPY(wh->i_addr3, ni->ni_bssid); *(uint16_t *)wh->i_seq = 0; return m; } /* * Update the dynamic parts of a beacon frame based on the current state. */ int ieee80211_beacon_update(struct ieee80211_node *ni, struct mbuf *m, int mcast) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211_beacon_offsets *bo = &vap->iv_bcn_off; struct ieee80211com *ic = ni->ni_ic; int len_changed = 0; uint16_t capinfo; struct ieee80211_frame *wh; ieee80211_seq seqno; IEEE80211_LOCK(ic); /* * Handle 11h channel change when we've reached the count. * We must recalculate the beacon frame contents to account * for the new channel. Note we do this only for the first * vap that reaches this point; subsequent vaps just update * their beacon state to reflect the recalculated channel. */ if (isset(bo->bo_flags, IEEE80211_BEACON_CSA) && vap->iv_csa_count == ic->ic_csa_count) { vap->iv_csa_count = 0; /* * Effect channel change before reconstructing the beacon * frame contents as many places reference ni_chan. */ if (ic->ic_csa_newchan != NULL) ieee80211_csa_completeswitch(ic); /* * NB: ieee80211_beacon_construct clears all pending * updates in bo_flags so we don't need to explicitly * clear IEEE80211_BEACON_CSA. */ ieee80211_beacon_construct(m, mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), ni); /* XXX do WME aggressive mode processing? */ IEEE80211_UNLOCK(ic); return 1; /* just assume length changed */ } wh = mtod(m, struct ieee80211_frame *); seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++; *(uint16_t *)&wh->i_seq[0] = htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT); M_SEQNO_SET(m, seqno); /* XXX faster to recalculate entirely or just changes? */ capinfo = ieee80211_getcapinfo(vap, ni->ni_chan); *bo->bo_caps = htole16(capinfo); if (vap->iv_flags & IEEE80211_F_WME) { struct ieee80211_wme_state *wme = &ic->ic_wme; /* * Check for agressive mode change. When there is * significant high priority traffic in the BSS * throttle back BE traffic by using conservative * parameters. Otherwise BE uses agressive params * to optimize performance of legacy/non-QoS traffic. */ if (wme->wme_flags & WME_F_AGGRMODE) { if (wme->wme_hipri_traffic > wme->wme_hipri_switch_thresh) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, "%s: traffic %u, disable aggressive mode\n", __func__, wme->wme_hipri_traffic); wme->wme_flags &= ~WME_F_AGGRMODE; ieee80211_wme_updateparams_locked(vap); wme->wme_hipri_traffic = wme->wme_hipri_switch_hysteresis; } else wme->wme_hipri_traffic = 0; } else { if (wme->wme_hipri_traffic <= wme->wme_hipri_switch_thresh) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, "%s: traffic %u, enable aggressive mode\n", __func__, wme->wme_hipri_traffic); wme->wme_flags |= WME_F_AGGRMODE; ieee80211_wme_updateparams_locked(vap); wme->wme_hipri_traffic = 0; } else wme->wme_hipri_traffic = wme->wme_hipri_switch_hysteresis; } if (isset(bo->bo_flags, IEEE80211_BEACON_WME)) { (void) ieee80211_add_wme_param(bo->bo_wme, wme); clrbit(bo->bo_flags, IEEE80211_BEACON_WME); } } if (isset(bo->bo_flags, IEEE80211_BEACON_HTINFO)) { ieee80211_ht_update_beacon(vap, bo); clrbit(bo->bo_flags, IEEE80211_BEACON_HTINFO); } #ifdef IEEE80211_SUPPORT_TDMA if (vap->iv_caps & IEEE80211_C_TDMA) { /* * NB: the beacon is potentially updated every TBTT. */ ieee80211_tdma_update_beacon(vap, bo); } #endif #ifdef IEEE80211_SUPPORT_MESH if (vap->iv_opmode == IEEE80211_M_MBSS) ieee80211_mesh_update_beacon(vap, bo); #endif if (vap->iv_opmode == IEEE80211_M_HOSTAP || vap->iv_opmode == IEEE80211_M_MBSS) { /* NB: no IBSS support*/ struct ieee80211_tim_ie *tie = (struct ieee80211_tim_ie *) bo->bo_tim; if (isset(bo->bo_flags, IEEE80211_BEACON_TIM)) { u_int timlen, timoff, i; /* * ATIM/DTIM needs updating. If it fits in the * current space allocated then just copy in the * new bits. Otherwise we need to move any trailing * data to make room. Note that we know there is * contiguous space because ieee80211_beacon_allocate * insures there is space in the mbuf to write a * maximal-size virtual bitmap (based on iv_max_aid). */ /* * Calculate the bitmap size and offset, copy any * trailer out of the way, and then copy in the * new bitmap and update the information element. * Note that the tim bitmap must contain at least * one byte and any offset must be even. */ if (vap->iv_ps_pending != 0) { timoff = 128; /* impossibly large */ for (i = 0; i < vap->iv_tim_len; i++) if (vap->iv_tim_bitmap[i]) { timoff = i &~ 1; break; } KASSERT(timoff != 128, ("tim bitmap empty!")); for (i = vap->iv_tim_len-1; i >= timoff; i--) if (vap->iv_tim_bitmap[i]) break; timlen = 1 + (i - timoff); } else { timoff = 0; timlen = 1; } if (timlen != bo->bo_tim_len) { /* copy up/down trailer */ int adjust = tie->tim_bitmap+timlen - bo->bo_tim_trailer; ovbcopy(bo->bo_tim_trailer, bo->bo_tim_trailer+adjust, bo->bo_tim_trailer_len); bo->bo_tim_trailer += adjust; bo->bo_erp += adjust; bo->bo_htinfo += adjust; #ifdef IEEE80211_SUPPORT_SUPERG bo->bo_ath += adjust; #endif #ifdef IEEE80211_SUPPORT_TDMA bo->bo_tdma += adjust; #endif #ifdef IEEE80211_SUPPORT_MESH bo->bo_meshconf += adjust; #endif bo->bo_appie += adjust; bo->bo_wme += adjust; bo->bo_csa += adjust; bo->bo_quiet += adjust; bo->bo_tim_len = timlen; /* update information element */ tie->tim_len = 3 + timlen; tie->tim_bitctl = timoff; len_changed = 1; } memcpy(tie->tim_bitmap, vap->iv_tim_bitmap + timoff, bo->bo_tim_len); clrbit(bo->bo_flags, IEEE80211_BEACON_TIM); IEEE80211_DPRINTF(vap, IEEE80211_MSG_POWER, "%s: TIM updated, pending %u, off %u, len %u\n", __func__, vap->iv_ps_pending, timoff, timlen); } /* count down DTIM period */ if (tie->tim_count == 0) tie->tim_count = tie->tim_period - 1; else tie->tim_count--; /* update state for buffered multicast frames on DTIM */ if (mcast && tie->tim_count == 0) tie->tim_bitctl |= 1; else tie->tim_bitctl &= ~1; if (isset(bo->bo_flags, IEEE80211_BEACON_CSA)) { struct ieee80211_csa_ie *csa = (struct ieee80211_csa_ie *) bo->bo_csa; /* * Insert or update CSA ie. If we're just starting * to count down to the channel switch then we need * to insert the CSA ie. Otherwise we just need to * drop the count. The actual change happens above * when the vap's count reaches the target count. */ if (vap->iv_csa_count == 0) { memmove(&csa[1], csa, bo->bo_csa_trailer_len); bo->bo_erp += sizeof(*csa); bo->bo_htinfo += sizeof(*csa); bo->bo_wme += sizeof(*csa); #ifdef IEEE80211_SUPPORT_SUPERG bo->bo_ath += sizeof(*csa); #endif #ifdef IEEE80211_SUPPORT_TDMA bo->bo_tdma += sizeof(*csa); #endif #ifdef IEEE80211_SUPPORT_MESH bo->bo_meshconf += sizeof(*csa); #endif bo->bo_appie += sizeof(*csa); bo->bo_csa_trailer_len += sizeof(*csa); bo->bo_quiet += sizeof(*csa); bo->bo_tim_trailer_len += sizeof(*csa); m->m_len += sizeof(*csa); m->m_pkthdr.len += sizeof(*csa); ieee80211_add_csa(bo->bo_csa, vap); } else csa->csa_count--; vap->iv_csa_count++; /* NB: don't clear IEEE80211_BEACON_CSA */ } if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && (vap->iv_flags_ext & IEEE80211_FEXT_DFS) ){ if (vap->iv_quiet) ieee80211_add_quiet(bo->bo_quiet, vap); } if (isset(bo->bo_flags, IEEE80211_BEACON_ERP)) { /* * ERP element needs updating. */ (void) ieee80211_add_erp(bo->bo_erp, ic); clrbit(bo->bo_flags, IEEE80211_BEACON_ERP); } #ifdef IEEE80211_SUPPORT_SUPERG if (isset(bo->bo_flags, IEEE80211_BEACON_ATH)) { ieee80211_add_athcaps(bo->bo_ath, ni); clrbit(bo->bo_flags, IEEE80211_BEACON_ATH); } #endif } if (isset(bo->bo_flags, IEEE80211_BEACON_APPIE)) { const struct ieee80211_appie *aie = vap->iv_appie_beacon; int aielen; uint8_t *frm; aielen = 0; if (aie != NULL) aielen += aie->ie_len; if (aielen != bo->bo_appie_len) { /* copy up/down trailer */ int adjust = aielen - bo->bo_appie_len; ovbcopy(bo->bo_tim_trailer, bo->bo_tim_trailer+adjust, bo->bo_tim_trailer_len); bo->bo_tim_trailer += adjust; bo->bo_appie += adjust; bo->bo_appie_len = aielen; len_changed = 1; } frm = bo->bo_appie; if (aie != NULL) frm = add_appie(frm, aie); clrbit(bo->bo_flags, IEEE80211_BEACON_APPIE); } IEEE80211_UNLOCK(ic); return len_changed; } /* * Do Ethernet-LLC encapsulation for each payload in a fast frame * tunnel encapsulation. The frame is assumed to have an Ethernet * header at the front that must be stripped before prepending the * LLC followed by the Ethernet header passed in (with an Ethernet * type that specifies the payload size). */ struct mbuf * ieee80211_ff_encap1(struct ieee80211vap *vap, struct mbuf *m, const struct ether_header *eh) { struct llc *llc; uint16_t payload; /* XXX optimize by combining m_adj+M_PREPEND */ m_adj(m, sizeof(struct ether_header) - sizeof(struct llc)); llc = mtod(m, struct llc *); llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP; llc->llc_control = LLC_UI; llc->llc_snap.org_code[0] = 0; llc->llc_snap.org_code[1] = 0; llc->llc_snap.org_code[2] = 0; llc->llc_snap.ether_type = eh->ether_type; payload = m->m_pkthdr.len; /* NB: w/o Ethernet header */ M_PREPEND(m, sizeof(struct ether_header), M_NOWAIT); if (m == NULL) { /* XXX cannot happen */ IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, "%s: no space for ether_header\n", __func__); vap->iv_stats.is_tx_nobuf++; return NULL; } ETHER_HEADER_COPY(mtod(m, void *), eh); mtod(m, struct ether_header *)->ether_type = htons(payload); return m; } /* * Complete an mbuf transmission. * * For now, this simply processes a completed frame after the * driver has completed it's transmission and/or retransmission. * It assumes the frame is an 802.11 encapsulated frame. * * Later on it will grow to become the exit path for a given frame * from the driver and, depending upon how it's been encapsulated * and already transmitted, it may end up doing A-MPDU retransmission, * power save requeuing, etc. * * In order for the above to work, the driver entry point to this * must not hold any driver locks. Thus, the driver needs to delay * any actual mbuf completion until it can release said locks. * * This frees the mbuf and if the mbuf has a node reference, * the node reference will be freed. */ void ieee80211_tx_complete(struct ieee80211_node *ni, struct mbuf *m, int status) { if (ni != NULL) { struct ifnet *ifp = ni->ni_vap->iv_ifp; if (status == 0) { if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len); if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); if (m->m_flags & M_MCAST) if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1); } else if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); if (m->m_flags & M_TXCB) ieee80211_process_callback(ni, m, status); ieee80211_free_node(ni); } m_freem(m); } Index: head/sys/net80211/ieee80211_proto.c =================================================================== --- head/sys/net80211/ieee80211_proto.c (revision 298375) +++ head/sys/net80211/ieee80211_proto.c (revision 298376) @@ -1,2217 +1,2215 @@ /*- * Copyright (c) 2001 Atsushi Onoe * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting * Copyright (c) 2012 IEEE * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); /* * IEEE 802.11 protocol support. */ #include "opt_inet.h" #include "opt_wlan.h" #include #include #include #include #include #include #include #include #include #include /* XXX for ether_sprintf */ #include #include #include #include #include #ifdef IEEE80211_SUPPORT_MESH #include #endif #include #include /* XXX tunables */ #define AGGRESSIVE_MODE_SWITCH_HYSTERESIS 3 /* pkts / 100ms */ #define HIGH_PRI_SWITCH_THRESH 10 /* pkts / 100ms */ -const char *ieee80211_mgt_subtype_name[] = { +const char *mgt_subtype_name[] = { "assoc_req", "assoc_resp", "reassoc_req", "reassoc_resp", "probe_req", "probe_resp", "timing_adv", "reserved#7", "beacon", "atim", "disassoc", "auth", "deauth", "action", "action_noack", "reserved#15" }; -const char *ieee80211_ctl_subtype_name[] = { +const char *ctl_subtype_name[] = { "reserved#0", "reserved#1", "reserved#2", "reserved#3", "reserved#4", "reserved#5", "reserved#6", "control_wrap", "bar", "ba", "ps_poll", "rts", "cts", "ack", "cf_end", "cf_end_ack" }; const char *ieee80211_opmode_name[IEEE80211_OPMODE_MAX] = { "IBSS", /* IEEE80211_M_IBSS */ "STA", /* IEEE80211_M_STA */ "WDS", /* IEEE80211_M_WDS */ "AHDEMO", /* IEEE80211_M_AHDEMO */ "HOSTAP", /* IEEE80211_M_HOSTAP */ "MONITOR", /* IEEE80211_M_MONITOR */ "MBSS" /* IEEE80211_M_MBSS */ }; const char *ieee80211_state_name[IEEE80211_S_MAX] = { "INIT", /* IEEE80211_S_INIT */ "SCAN", /* IEEE80211_S_SCAN */ "AUTH", /* IEEE80211_S_AUTH */ "ASSOC", /* IEEE80211_S_ASSOC */ "CAC", /* IEEE80211_S_CAC */ "RUN", /* IEEE80211_S_RUN */ "CSA", /* IEEE80211_S_CSA */ "SLEEP", /* IEEE80211_S_SLEEP */ }; const char *ieee80211_wme_acnames[] = { "WME_AC_BE", "WME_AC_BK", "WME_AC_VI", "WME_AC_VO", "WME_UPSD", }; /* * Reason code descriptions were (mostly) obtained from * IEEE Std 802.11-2012, pp. 442-445 Table 8-36. */ const char * ieee80211_reason_to_string(uint16_t reason) { switch (reason) { case IEEE80211_REASON_UNSPECIFIED: return ("unspecified"); case IEEE80211_REASON_AUTH_EXPIRE: return ("previous authentication is expired"); case IEEE80211_REASON_AUTH_LEAVE: return ("sending STA is leaving/has left IBSS or ESS"); case IEEE80211_REASON_ASSOC_EXPIRE: return ("disassociated due to inactivity"); case IEEE80211_REASON_ASSOC_TOOMANY: return ("too many associated STAs"); case IEEE80211_REASON_NOT_AUTHED: return ("class 2 frame received from nonauthenticated STA"); case IEEE80211_REASON_NOT_ASSOCED: return ("class 3 frame received from nonassociated STA"); case IEEE80211_REASON_ASSOC_LEAVE: return ("sending STA is leaving/has left BSS"); case IEEE80211_REASON_ASSOC_NOT_AUTHED: return ("STA requesting (re)association is not authenticated"); case IEEE80211_REASON_DISASSOC_PWRCAP_BAD: return ("information in the Power Capability element is " "unacceptable"); case IEEE80211_REASON_DISASSOC_SUPCHAN_BAD: return ("information in the Supported Channels element is " "unacceptable"); case IEEE80211_REASON_IE_INVALID: return ("invalid element"); case IEEE80211_REASON_MIC_FAILURE: return ("MIC failure"); case IEEE80211_REASON_4WAY_HANDSHAKE_TIMEOUT: return ("4-Way handshake timeout"); case IEEE80211_REASON_GROUP_KEY_UPDATE_TIMEOUT: return ("group key update timeout"); case IEEE80211_REASON_IE_IN_4WAY_DIFFERS: return ("element in 4-Way handshake different from " "(re)association request/probe response/beacon frame"); case IEEE80211_REASON_GROUP_CIPHER_INVALID: return ("invalid group cipher"); case IEEE80211_REASON_PAIRWISE_CIPHER_INVALID: return ("invalid pairwise cipher"); case IEEE80211_REASON_AKMP_INVALID: return ("invalid AKMP"); case IEEE80211_REASON_UNSUPP_RSN_IE_VERSION: return ("unsupported version in RSN IE"); case IEEE80211_REASON_INVALID_RSN_IE_CAP: return ("invalid capabilities in RSN IE"); case IEEE80211_REASON_802_1X_AUTH_FAILED: return ("IEEE 802.1X authentication failed"); case IEEE80211_REASON_CIPHER_SUITE_REJECTED: return ("cipher suite rejected because of the security " "policy"); case IEEE80211_REASON_UNSPECIFIED_QOS: return ("unspecified (QoS-related)"); case IEEE80211_REASON_INSUFFICIENT_BW: return ("QoS AP lacks sufficient bandwidth for this QoS STA"); case IEEE80211_REASON_TOOMANY_FRAMES: return ("too many frames need to be acknowledged"); case IEEE80211_REASON_OUTSIDE_TXOP: return ("STA is transmitting outside the limits of its TXOPs"); case IEEE80211_REASON_LEAVING_QBSS: return ("requested from peer STA (the STA is " "resetting/leaving the BSS)"); case IEEE80211_REASON_BAD_MECHANISM: return ("requested from peer STA (it does not want to use " "the mechanism)"); case IEEE80211_REASON_SETUP_NEEDED: return ("requested from peer STA (setup is required for the " "used mechanism)"); case IEEE80211_REASON_TIMEOUT: return ("requested from peer STA (timeout)"); case IEEE80211_REASON_PEER_LINK_CANCELED: return ("SME cancels the mesh peering instance (not related " "to the maximum number of peer mesh STAs)"); case IEEE80211_REASON_MESH_MAX_PEERS: return ("maximum number of peer mesh STAs was reached"); case IEEE80211_REASON_MESH_CPVIOLATION: return ("the received information violates the Mesh " "Configuration policy configured in the mesh STA " "profile"); case IEEE80211_REASON_MESH_CLOSE_RCVD: return ("the mesh STA has received a Mesh Peering Close " "message requesting to close the mesh peering"); case IEEE80211_REASON_MESH_MAX_RETRIES: return ("the mesh STA has resent dot11MeshMaxRetries Mesh " "Peering Open messages, without receiving a Mesh " "Peering Confirm message"); case IEEE80211_REASON_MESH_CONFIRM_TIMEOUT: return ("the confirmTimer for the mesh peering instance times " "out"); case IEEE80211_REASON_MESH_INVALID_GTK: return ("the mesh STA fails to unwrap the GTK or the values " "in the wrapped contents do not match"); case IEEE80211_REASON_MESH_INCONS_PARAMS: return ("the mesh STA receives inconsistent information about " "the mesh parameters between Mesh Peering Management " "frames"); case IEEE80211_REASON_MESH_INVALID_SECURITY: return ("the mesh STA fails the authenticated mesh peering " "exchange because due to failure in selecting " "pairwise/group ciphersuite"); case IEEE80211_REASON_MESH_PERR_NO_PROXY: return ("the mesh STA does not have proxy information for " "this external destination"); case IEEE80211_REASON_MESH_PERR_NO_FI: return ("the mesh STA does not have forwarding information " "for this destination"); case IEEE80211_REASON_MESH_PERR_DEST_UNREACH: return ("the mesh STA determines that the link to the next " "hop of an active path in its forwarding information " "is no longer usable"); case IEEE80211_REASON_MESH_MAC_ALRDY_EXISTS_MBSS: return ("the MAC address of the STA already exists in the " "mesh BSS"); case IEEE80211_REASON_MESH_CHAN_SWITCH_REG: return ("the mesh STA performs channel switch to meet " "regulatory requirements"); case IEEE80211_REASON_MESH_CHAN_SWITCH_UNSPEC: return ("the mesh STA performs channel switch with " "unspecified reason"); default: return ("reserved/unknown"); } } static void beacon_miss(void *, int); static void beacon_swmiss(void *, int); static void parent_updown(void *, int); static void update_mcast(void *, int); static void update_promisc(void *, int); static void update_channel(void *, int); static void update_chw(void *, int); static void update_wme(void *, int); static void restart_vaps(void *, int); static void ieee80211_newstate_cb(void *, int); static int null_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, const struct ieee80211_bpf_params *params) { ic_printf(ni->ni_ic, "missing ic_raw_xmit callback, drop frame\n"); m_freem(m); return ENETDOWN; } void ieee80211_proto_attach(struct ieee80211com *ic) { uint8_t hdrlen; /* override the 802.3 setting */ hdrlen = ic->ic_headroom + sizeof(struct ieee80211_qosframe_addr4) + IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN + IEEE80211_WEP_EXTIVLEN; /* XXX no way to recalculate on ifdetach */ if (ALIGN(hdrlen) > max_linkhdr) { /* XXX sanity check... */ max_linkhdr = ALIGN(hdrlen); max_hdr = max_linkhdr + max_protohdr; max_datalen = MHLEN - max_hdr; } ic->ic_protmode = IEEE80211_PROT_CTSONLY; TASK_INIT(&ic->ic_parent_task, 0, parent_updown, ic); TASK_INIT(&ic->ic_mcast_task, 0, update_mcast, ic); TASK_INIT(&ic->ic_promisc_task, 0, update_promisc, ic); TASK_INIT(&ic->ic_chan_task, 0, update_channel, ic); TASK_INIT(&ic->ic_bmiss_task, 0, beacon_miss, ic); TASK_INIT(&ic->ic_chw_task, 0, update_chw, ic); TASK_INIT(&ic->ic_wme_task, 0, update_wme, ic); TASK_INIT(&ic->ic_restart_task, 0, restart_vaps, ic); ic->ic_wme.wme_hipri_switch_hysteresis = AGGRESSIVE_MODE_SWITCH_HYSTERESIS; /* initialize management frame handlers */ ic->ic_send_mgmt = ieee80211_send_mgmt; ic->ic_raw_xmit = null_raw_xmit; ieee80211_adhoc_attach(ic); ieee80211_sta_attach(ic); ieee80211_wds_attach(ic); ieee80211_hostap_attach(ic); #ifdef IEEE80211_SUPPORT_MESH ieee80211_mesh_attach(ic); #endif ieee80211_monitor_attach(ic); } void ieee80211_proto_detach(struct ieee80211com *ic) { ieee80211_monitor_detach(ic); #ifdef IEEE80211_SUPPORT_MESH ieee80211_mesh_detach(ic); #endif ieee80211_hostap_detach(ic); ieee80211_wds_detach(ic); ieee80211_adhoc_detach(ic); ieee80211_sta_detach(ic); } static void null_update_beacon(struct ieee80211vap *vap, int item) { } void ieee80211_proto_vattach(struct ieee80211vap *vap) { struct ieee80211com *ic = vap->iv_ic; struct ifnet *ifp = vap->iv_ifp; int i; /* override the 802.3 setting */ ifp->if_hdrlen = ic->ic_headroom + sizeof(struct ieee80211_qosframe_addr4) + IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN + IEEE80211_WEP_EXTIVLEN; vap->iv_rtsthreshold = IEEE80211_RTS_DEFAULT; vap->iv_fragthreshold = IEEE80211_FRAG_DEFAULT; vap->iv_bmiss_max = IEEE80211_BMISS_MAX; callout_init_mtx(&vap->iv_swbmiss, IEEE80211_LOCK_OBJ(ic), 0); callout_init(&vap->iv_mgtsend, 1); TASK_INIT(&vap->iv_nstate_task, 0, ieee80211_newstate_cb, vap); TASK_INIT(&vap->iv_swbmiss_task, 0, beacon_swmiss, vap); /* * Install default tx rate handling: no fixed rate, lowest * supported rate for mgmt and multicast frames. Default * max retry count. These settings can be changed by the * driver and/or user applications. */ for (i = IEEE80211_MODE_11A; i < IEEE80211_MODE_MAX; i++) { const struct ieee80211_rateset *rs = &ic->ic_sup_rates[i]; vap->iv_txparms[i].ucastrate = IEEE80211_FIXED_RATE_NONE; /* * Setting the management rate to MCS 0 assumes that the * BSS Basic rate set is empty and the BSS Basic MCS set * is not. * * Since we're not checking this, default to the lowest * defined rate for this mode. * * At least one 11n AP (DLINK DIR-825) is reported to drop * some MCS management traffic (eg BA response frames.) * * See also: 9.6.0 of the 802.11n-2009 specification. */ #ifdef NOTYET if (i == IEEE80211_MODE_11NA || i == IEEE80211_MODE_11NG) { vap->iv_txparms[i].mgmtrate = 0 | IEEE80211_RATE_MCS; vap->iv_txparms[i].mcastrate = 0 | IEEE80211_RATE_MCS; } else { vap->iv_txparms[i].mgmtrate = rs->rs_rates[0] & IEEE80211_RATE_VAL; vap->iv_txparms[i].mcastrate = rs->rs_rates[0] & IEEE80211_RATE_VAL; } #endif vap->iv_txparms[i].mgmtrate = rs->rs_rates[0] & IEEE80211_RATE_VAL; vap->iv_txparms[i].mcastrate = rs->rs_rates[0] & IEEE80211_RATE_VAL; vap->iv_txparms[i].maxretry = IEEE80211_TXMAX_DEFAULT; } vap->iv_roaming = IEEE80211_ROAMING_AUTO; vap->iv_update_beacon = null_update_beacon; vap->iv_deliver_data = ieee80211_deliver_data; /* attach support for operating mode */ ic->ic_vattach[vap->iv_opmode](vap); } void ieee80211_proto_vdetach(struct ieee80211vap *vap) { #define FREEAPPIE(ie) do { \ if (ie != NULL) \ IEEE80211_FREE(ie, M_80211_NODE_IE); \ } while (0) /* * Detach operating mode module. */ if (vap->iv_opdetach != NULL) vap->iv_opdetach(vap); /* * This should not be needed as we detach when reseting * the state but be conservative here since the * authenticator may do things like spawn kernel threads. */ if (vap->iv_auth->ia_detach != NULL) vap->iv_auth->ia_detach(vap); /* * Detach any ACL'ator. */ if (vap->iv_acl != NULL) vap->iv_acl->iac_detach(vap); FREEAPPIE(vap->iv_appie_beacon); FREEAPPIE(vap->iv_appie_probereq); FREEAPPIE(vap->iv_appie_proberesp); FREEAPPIE(vap->iv_appie_assocreq); FREEAPPIE(vap->iv_appie_assocresp); FREEAPPIE(vap->iv_appie_wpa); #undef FREEAPPIE } /* * Simple-minded authenticator module support. */ #define IEEE80211_AUTH_MAX (IEEE80211_AUTH_WPA+1) /* XXX well-known names */ static const char *auth_modnames[IEEE80211_AUTH_MAX] = { "wlan_internal", /* IEEE80211_AUTH_NONE */ "wlan_internal", /* IEEE80211_AUTH_OPEN */ "wlan_internal", /* IEEE80211_AUTH_SHARED */ "wlan_xauth", /* IEEE80211_AUTH_8021X */ "wlan_internal", /* IEEE80211_AUTH_AUTO */ "wlan_xauth", /* IEEE80211_AUTH_WPA */ }; static const struct ieee80211_authenticator *authenticators[IEEE80211_AUTH_MAX]; static const struct ieee80211_authenticator auth_internal = { .ia_name = "wlan_internal", .ia_attach = NULL, .ia_detach = NULL, .ia_node_join = NULL, .ia_node_leave = NULL, }; /* * Setup internal authenticators once; they are never unregistered. */ static void ieee80211_auth_setup(void) { ieee80211_authenticator_register(IEEE80211_AUTH_OPEN, &auth_internal); ieee80211_authenticator_register(IEEE80211_AUTH_SHARED, &auth_internal); ieee80211_authenticator_register(IEEE80211_AUTH_AUTO, &auth_internal); } SYSINIT(wlan_auth, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_auth_setup, NULL); const struct ieee80211_authenticator * ieee80211_authenticator_get(int auth) { if (auth >= IEEE80211_AUTH_MAX) return NULL; if (authenticators[auth] == NULL) ieee80211_load_module(auth_modnames[auth]); return authenticators[auth]; } void ieee80211_authenticator_register(int type, const struct ieee80211_authenticator *auth) { if (type >= IEEE80211_AUTH_MAX) return; authenticators[type] = auth; } void ieee80211_authenticator_unregister(int type) { if (type >= IEEE80211_AUTH_MAX) return; authenticators[type] = NULL; } /* * Very simple-minded ACL module support. */ /* XXX just one for now */ static const struct ieee80211_aclator *acl = NULL; void ieee80211_aclator_register(const struct ieee80211_aclator *iac) { printf("wlan: %s acl policy registered\n", iac->iac_name); acl = iac; } void ieee80211_aclator_unregister(const struct ieee80211_aclator *iac) { if (acl == iac) acl = NULL; printf("wlan: %s acl policy unregistered\n", iac->iac_name); } const struct ieee80211_aclator * ieee80211_aclator_get(const char *name) { if (acl == NULL) ieee80211_load_module("wlan_acl"); return acl != NULL && strcmp(acl->iac_name, name) == 0 ? acl : NULL; } void ieee80211_print_essid(const uint8_t *essid, int len) { const uint8_t *p; int i; if (len > IEEE80211_NWID_LEN) len = IEEE80211_NWID_LEN; /* determine printable or not */ for (i = 0, p = essid; i < len; i++, p++) { if (*p < ' ' || *p > 0x7e) break; } if (i == len) { printf("\""); for (i = 0, p = essid; i < len; i++, p++) printf("%c", *p); printf("\""); } else { printf("0x"); for (i = 0, p = essid; i < len; i++, p++) printf("%02x", *p); } } void ieee80211_dump_pkt(struct ieee80211com *ic, const uint8_t *buf, int len, int rate, int rssi) { const struct ieee80211_frame *wh; int i; wh = (const struct ieee80211_frame *)buf; switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) { case IEEE80211_FC1_DIR_NODS: printf("NODS %s", ether_sprintf(wh->i_addr2)); printf("->%s", ether_sprintf(wh->i_addr1)); printf("(%s)", ether_sprintf(wh->i_addr3)); break; case IEEE80211_FC1_DIR_TODS: printf("TODS %s", ether_sprintf(wh->i_addr2)); printf("->%s", ether_sprintf(wh->i_addr3)); printf("(%s)", ether_sprintf(wh->i_addr1)); break; case IEEE80211_FC1_DIR_FROMDS: printf("FRDS %s", ether_sprintf(wh->i_addr3)); printf("->%s", ether_sprintf(wh->i_addr1)); printf("(%s)", ether_sprintf(wh->i_addr2)); break; case IEEE80211_FC1_DIR_DSTODS: printf("DSDS %s", ether_sprintf((const uint8_t *)&wh[1])); printf("->%s", ether_sprintf(wh->i_addr3)); printf("(%s", ether_sprintf(wh->i_addr2)); printf("->%s)", ether_sprintf(wh->i_addr1)); break; } switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) { case IEEE80211_FC0_TYPE_DATA: printf(" data"); break; case IEEE80211_FC0_TYPE_MGT: - printf(" %s", ieee80211_mgt_subtype_name[ - (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) - >> IEEE80211_FC0_SUBTYPE_SHIFT]); + printf(" %s", ieee80211_mgt_subtype_name(wh->i_fc[0])); break; default: printf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK); break; } if (IEEE80211_QOS_HAS_SEQ(wh)) { const struct ieee80211_qosframe *qwh = (const struct ieee80211_qosframe *)buf; printf(" QoS [TID %u%s]", qwh->i_qos[0] & IEEE80211_QOS_TID, qwh->i_qos[0] & IEEE80211_QOS_ACKPOLICY ? " ACM" : ""); } if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { int off; off = ieee80211_anyhdrspace(ic, wh); printf(" WEP [IV %.02x %.02x %.02x", buf[off+0], buf[off+1], buf[off+2]); if (buf[off+IEEE80211_WEP_IVLEN] & IEEE80211_WEP_EXTIV) printf(" %.02x %.02x %.02x", buf[off+4], buf[off+5], buf[off+6]); printf(" KID %u]", buf[off+IEEE80211_WEP_IVLEN] >> 6); } if (rate >= 0) printf(" %dM", rate / 2); if (rssi >= 0) printf(" +%d", rssi); printf("\n"); if (len > 0) { for (i = 0; i < len; i++) { if ((i & 1) == 0) printf(" "); printf("%02x", buf[i]); } printf("\n"); } } static __inline int findrix(const struct ieee80211_rateset *rs, int r) { int i; for (i = 0; i < rs->rs_nrates; i++) if ((rs->rs_rates[i] & IEEE80211_RATE_VAL) == r) return i; return -1; } int ieee80211_fix_rate(struct ieee80211_node *ni, struct ieee80211_rateset *nrs, int flags) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; int i, j, rix, error; int okrate, badrate, fixedrate, ucastrate; const struct ieee80211_rateset *srs; uint8_t r; error = 0; okrate = badrate = 0; ucastrate = vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)].ucastrate; if (ucastrate != IEEE80211_FIXED_RATE_NONE) { /* * Workaround awkwardness with fixed rate. We are called * to check both the legacy rate set and the HT rate set * but we must apply any legacy fixed rate check only to the * legacy rate set and vice versa. We cannot tell what type * of rate set we've been given (legacy or HT) but we can * distinguish the fixed rate type (MCS have 0x80 set). * So to deal with this the caller communicates whether to * check MCS or legacy rate using the flags and we use the * type of any fixed rate to avoid applying an MCS to a * legacy rate and vice versa. */ if (ucastrate & 0x80) { if (flags & IEEE80211_F_DOFRATE) flags &= ~IEEE80211_F_DOFRATE; } else if ((ucastrate & 0x80) == 0) { if (flags & IEEE80211_F_DOFMCS) flags &= ~IEEE80211_F_DOFMCS; } /* NB: required to make MCS match below work */ ucastrate &= IEEE80211_RATE_VAL; } fixedrate = IEEE80211_FIXED_RATE_NONE; /* * XXX we are called to process both MCS and legacy rates; * we must use the appropriate basic rate set or chaos will * ensue; for now callers that want MCS must supply * IEEE80211_F_DOBRS; at some point we'll need to split this * function so there are two variants, one for MCS and one * for legacy rates. */ if (flags & IEEE80211_F_DOBRS) srs = (const struct ieee80211_rateset *) ieee80211_get_suphtrates(ic, ni->ni_chan); else srs = ieee80211_get_suprates(ic, ni->ni_chan); for (i = 0; i < nrs->rs_nrates; ) { if (flags & IEEE80211_F_DOSORT) { /* * Sort rates. */ for (j = i + 1; j < nrs->rs_nrates; j++) { if (IEEE80211_RV(nrs->rs_rates[i]) > IEEE80211_RV(nrs->rs_rates[j])) { r = nrs->rs_rates[i]; nrs->rs_rates[i] = nrs->rs_rates[j]; nrs->rs_rates[j] = r; } } } r = nrs->rs_rates[i] & IEEE80211_RATE_VAL; badrate = r; /* * Check for fixed rate. */ if (r == ucastrate) fixedrate = r; /* * Check against supported rates. */ rix = findrix(srs, r); if (flags & IEEE80211_F_DONEGO) { if (rix < 0) { /* * A rate in the node's rate set is not * supported. If this is a basic rate and we * are operating as a STA then this is an error. * Otherwise we just discard/ignore the rate. */ if ((flags & IEEE80211_F_JOIN) && (nrs->rs_rates[i] & IEEE80211_RATE_BASIC)) error++; } else if ((flags & IEEE80211_F_JOIN) == 0) { /* * Overwrite with the supported rate * value so any basic rate bit is set. */ nrs->rs_rates[i] = srs->rs_rates[rix]; } } if ((flags & IEEE80211_F_DODEL) && rix < 0) { /* * Delete unacceptable rates. */ nrs->rs_nrates--; for (j = i; j < nrs->rs_nrates; j++) nrs->rs_rates[j] = nrs->rs_rates[j + 1]; nrs->rs_rates[j] = 0; continue; } if (rix >= 0) okrate = nrs->rs_rates[i]; i++; } if (okrate == 0 || error != 0 || ((flags & (IEEE80211_F_DOFRATE|IEEE80211_F_DOFMCS)) && fixedrate != ucastrate)) { IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, "%s: flags 0x%x okrate %d error %d fixedrate 0x%x " "ucastrate %x\n", __func__, fixedrate, ucastrate, flags); return badrate | IEEE80211_RATE_BASIC; } else return IEEE80211_RV(okrate); } /* * Reset 11g-related state. */ void ieee80211_reset_erp(struct ieee80211com *ic) { ic->ic_flags &= ~IEEE80211_F_USEPROT; ic->ic_nonerpsta = 0; ic->ic_longslotsta = 0; /* * Short slot time is enabled only when operating in 11g * and not in an IBSS. We must also honor whether or not * the driver is capable of doing it. */ ieee80211_set_shortslottime(ic, IEEE80211_IS_CHAN_A(ic->ic_curchan) || IEEE80211_IS_CHAN_HT(ic->ic_curchan) || (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && ic->ic_opmode == IEEE80211_M_HOSTAP && (ic->ic_caps & IEEE80211_C_SHSLOT))); /* * Set short preamble and ERP barker-preamble flags. */ if (IEEE80211_IS_CHAN_A(ic->ic_curchan) || (ic->ic_caps & IEEE80211_C_SHPREAMBLE)) { ic->ic_flags |= IEEE80211_F_SHPREAMBLE; ic->ic_flags &= ~IEEE80211_F_USEBARKER; } else { ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; ic->ic_flags |= IEEE80211_F_USEBARKER; } } /* * Set the short slot time state and notify the driver. */ void ieee80211_set_shortslottime(struct ieee80211com *ic, int onoff) { if (onoff) ic->ic_flags |= IEEE80211_F_SHSLOT; else ic->ic_flags &= ~IEEE80211_F_SHSLOT; /* notify driver */ if (ic->ic_updateslot != NULL) ic->ic_updateslot(ic); } /* * Check if the specified rate set supports ERP. * NB: the rate set is assumed to be sorted. */ int ieee80211_iserp_rateset(const struct ieee80211_rateset *rs) { static const int rates[] = { 2, 4, 11, 22, 12, 24, 48 }; int i, j; if (rs->rs_nrates < nitems(rates)) return 0; for (i = 0; i < nitems(rates); i++) { for (j = 0; j < rs->rs_nrates; j++) { int r = rs->rs_rates[j] & IEEE80211_RATE_VAL; if (rates[i] == r) goto next; if (r > rates[i]) return 0; } return 0; next: ; } return 1; } /* * Mark the basic rates for the rate table based on the * operating mode. For real 11g we mark all the 11b rates * and 6, 12, and 24 OFDM. For 11b compatibility we mark only * 11b rates. There's also a pseudo 11a-mode used to mark only * the basic OFDM rates. */ static void setbasicrates(struct ieee80211_rateset *rs, enum ieee80211_phymode mode, int add) { static const struct ieee80211_rateset basic[IEEE80211_MODE_MAX] = { [IEEE80211_MODE_11A] = { 3, { 12, 24, 48 } }, [IEEE80211_MODE_11B] = { 2, { 2, 4 } }, /* NB: mixed b/g */ [IEEE80211_MODE_11G] = { 4, { 2, 4, 11, 22 } }, [IEEE80211_MODE_TURBO_A] = { 3, { 12, 24, 48 } }, [IEEE80211_MODE_TURBO_G] = { 4, { 2, 4, 11, 22 } }, [IEEE80211_MODE_STURBO_A] = { 3, { 12, 24, 48 } }, [IEEE80211_MODE_HALF] = { 3, { 6, 12, 24 } }, [IEEE80211_MODE_QUARTER] = { 3, { 3, 6, 12 } }, [IEEE80211_MODE_11NA] = { 3, { 12, 24, 48 } }, /* NB: mixed b/g */ [IEEE80211_MODE_11NG] = { 4, { 2, 4, 11, 22 } }, }; int i, j; for (i = 0; i < rs->rs_nrates; i++) { if (!add) rs->rs_rates[i] &= IEEE80211_RATE_VAL; for (j = 0; j < basic[mode].rs_nrates; j++) if (basic[mode].rs_rates[j] == rs->rs_rates[i]) { rs->rs_rates[i] |= IEEE80211_RATE_BASIC; break; } } } /* * Set the basic rates in a rate set. */ void ieee80211_setbasicrates(struct ieee80211_rateset *rs, enum ieee80211_phymode mode) { setbasicrates(rs, mode, 0); } /* * Add basic rates to a rate set. */ void ieee80211_addbasicrates(struct ieee80211_rateset *rs, enum ieee80211_phymode mode) { setbasicrates(rs, mode, 1); } /* * WME protocol support. * * The default 11a/b/g/n parameters come from the WiFi Alliance WMM * System Interopability Test Plan (v1.4, Appendix F) and the 802.11n * Draft 2.0 Test Plan (Appendix D). * * Static/Dynamic Turbo mode settings come from Atheros. */ typedef struct phyParamType { uint8_t aifsn; uint8_t logcwmin; uint8_t logcwmax; uint16_t txopLimit; uint8_t acm; } paramType; static const struct phyParamType phyParamForAC_BE[IEEE80211_MODE_MAX] = { [IEEE80211_MODE_AUTO] = { 3, 4, 6, 0, 0 }, [IEEE80211_MODE_11A] = { 3, 4, 6, 0, 0 }, [IEEE80211_MODE_11B] = { 3, 4, 6, 0, 0 }, [IEEE80211_MODE_11G] = { 3, 4, 6, 0, 0 }, [IEEE80211_MODE_FH] = { 3, 4, 6, 0, 0 }, [IEEE80211_MODE_TURBO_A]= { 2, 3, 5, 0, 0 }, [IEEE80211_MODE_TURBO_G]= { 2, 3, 5, 0, 0 }, [IEEE80211_MODE_STURBO_A]={ 2, 3, 5, 0, 0 }, [IEEE80211_MODE_HALF] = { 3, 4, 6, 0, 0 }, [IEEE80211_MODE_QUARTER]= { 3, 4, 6, 0, 0 }, [IEEE80211_MODE_11NA] = { 3, 4, 6, 0, 0 }, [IEEE80211_MODE_11NG] = { 3, 4, 6, 0, 0 }, }; static const struct phyParamType phyParamForAC_BK[IEEE80211_MODE_MAX] = { [IEEE80211_MODE_AUTO] = { 7, 4, 10, 0, 0 }, [IEEE80211_MODE_11A] = { 7, 4, 10, 0, 0 }, [IEEE80211_MODE_11B] = { 7, 4, 10, 0, 0 }, [IEEE80211_MODE_11G] = { 7, 4, 10, 0, 0 }, [IEEE80211_MODE_FH] = { 7, 4, 10, 0, 0 }, [IEEE80211_MODE_TURBO_A]= { 7, 3, 10, 0, 0 }, [IEEE80211_MODE_TURBO_G]= { 7, 3, 10, 0, 0 }, [IEEE80211_MODE_STURBO_A]={ 7, 3, 10, 0, 0 }, [IEEE80211_MODE_HALF] = { 7, 4, 10, 0, 0 }, [IEEE80211_MODE_QUARTER]= { 7, 4, 10, 0, 0 }, [IEEE80211_MODE_11NA] = { 7, 4, 10, 0, 0 }, [IEEE80211_MODE_11NG] = { 7, 4, 10, 0, 0 }, }; static const struct phyParamType phyParamForAC_VI[IEEE80211_MODE_MAX] = { [IEEE80211_MODE_AUTO] = { 1, 3, 4, 94, 0 }, [IEEE80211_MODE_11A] = { 1, 3, 4, 94, 0 }, [IEEE80211_MODE_11B] = { 1, 3, 4, 188, 0 }, [IEEE80211_MODE_11G] = { 1, 3, 4, 94, 0 }, [IEEE80211_MODE_FH] = { 1, 3, 4, 188, 0 }, [IEEE80211_MODE_TURBO_A]= { 1, 2, 3, 94, 0 }, [IEEE80211_MODE_TURBO_G]= { 1, 2, 3, 94, 0 }, [IEEE80211_MODE_STURBO_A]={ 1, 2, 3, 94, 0 }, [IEEE80211_MODE_HALF] = { 1, 3, 4, 94, 0 }, [IEEE80211_MODE_QUARTER]= { 1, 3, 4, 94, 0 }, [IEEE80211_MODE_11NA] = { 1, 3, 4, 94, 0 }, [IEEE80211_MODE_11NG] = { 1, 3, 4, 94, 0 }, }; static const struct phyParamType phyParamForAC_VO[IEEE80211_MODE_MAX] = { [IEEE80211_MODE_AUTO] = { 1, 2, 3, 47, 0 }, [IEEE80211_MODE_11A] = { 1, 2, 3, 47, 0 }, [IEEE80211_MODE_11B] = { 1, 2, 3, 102, 0 }, [IEEE80211_MODE_11G] = { 1, 2, 3, 47, 0 }, [IEEE80211_MODE_FH] = { 1, 2, 3, 102, 0 }, [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 }, [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 }, [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 }, [IEEE80211_MODE_HALF] = { 1, 2, 3, 47, 0 }, [IEEE80211_MODE_QUARTER]= { 1, 2, 3, 47, 0 }, [IEEE80211_MODE_11NA] = { 1, 2, 3, 47, 0 }, [IEEE80211_MODE_11NG] = { 1, 2, 3, 47, 0 }, }; static const struct phyParamType bssPhyParamForAC_BE[IEEE80211_MODE_MAX] = { [IEEE80211_MODE_AUTO] = { 3, 4, 10, 0, 0 }, [IEEE80211_MODE_11A] = { 3, 4, 10, 0, 0 }, [IEEE80211_MODE_11B] = { 3, 4, 10, 0, 0 }, [IEEE80211_MODE_11G] = { 3, 4, 10, 0, 0 }, [IEEE80211_MODE_FH] = { 3, 4, 10, 0, 0 }, [IEEE80211_MODE_TURBO_A]= { 2, 3, 10, 0, 0 }, [IEEE80211_MODE_TURBO_G]= { 2, 3, 10, 0, 0 }, [IEEE80211_MODE_STURBO_A]={ 2, 3, 10, 0, 0 }, [IEEE80211_MODE_HALF] = { 3, 4, 10, 0, 0 }, [IEEE80211_MODE_QUARTER]= { 3, 4, 10, 0, 0 }, [IEEE80211_MODE_11NA] = { 3, 4, 10, 0, 0 }, [IEEE80211_MODE_11NG] = { 3, 4, 10, 0, 0 }, }; static const struct phyParamType bssPhyParamForAC_VI[IEEE80211_MODE_MAX] = { [IEEE80211_MODE_AUTO] = { 2, 3, 4, 94, 0 }, [IEEE80211_MODE_11A] = { 2, 3, 4, 94, 0 }, [IEEE80211_MODE_11B] = { 2, 3, 4, 188, 0 }, [IEEE80211_MODE_11G] = { 2, 3, 4, 94, 0 }, [IEEE80211_MODE_FH] = { 2, 3, 4, 188, 0 }, [IEEE80211_MODE_TURBO_A]= { 2, 2, 3, 94, 0 }, [IEEE80211_MODE_TURBO_G]= { 2, 2, 3, 94, 0 }, [IEEE80211_MODE_STURBO_A]={ 2, 2, 3, 94, 0 }, [IEEE80211_MODE_HALF] = { 2, 3, 4, 94, 0 }, [IEEE80211_MODE_QUARTER]= { 2, 3, 4, 94, 0 }, [IEEE80211_MODE_11NA] = { 2, 3, 4, 94, 0 }, [IEEE80211_MODE_11NG] = { 2, 3, 4, 94, 0 }, }; static const struct phyParamType bssPhyParamForAC_VO[IEEE80211_MODE_MAX] = { [IEEE80211_MODE_AUTO] = { 2, 2, 3, 47, 0 }, [IEEE80211_MODE_11A] = { 2, 2, 3, 47, 0 }, [IEEE80211_MODE_11B] = { 2, 2, 3, 102, 0 }, [IEEE80211_MODE_11G] = { 2, 2, 3, 47, 0 }, [IEEE80211_MODE_FH] = { 2, 2, 3, 102, 0 }, [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 }, [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 }, [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 }, [IEEE80211_MODE_HALF] = { 2, 2, 3, 47, 0 }, [IEEE80211_MODE_QUARTER]= { 2, 2, 3, 47, 0 }, [IEEE80211_MODE_11NA] = { 2, 2, 3, 47, 0 }, [IEEE80211_MODE_11NG] = { 2, 2, 3, 47, 0 }, }; static void _setifsparams(struct wmeParams *wmep, const paramType *phy) { wmep->wmep_aifsn = phy->aifsn; wmep->wmep_logcwmin = phy->logcwmin; wmep->wmep_logcwmax = phy->logcwmax; wmep->wmep_txopLimit = phy->txopLimit; } static void setwmeparams(struct ieee80211vap *vap, const char *type, int ac, struct wmeParams *wmep, const paramType *phy) { wmep->wmep_acm = phy->acm; _setifsparams(wmep, phy); IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, "set %s (%s) [acm %u aifsn %u logcwmin %u logcwmax %u txop %u]\n", ieee80211_wme_acnames[ac], type, wmep->wmep_acm, wmep->wmep_aifsn, wmep->wmep_logcwmin, wmep->wmep_logcwmax, wmep->wmep_txopLimit); } static void ieee80211_wme_initparams_locked(struct ieee80211vap *vap) { struct ieee80211com *ic = vap->iv_ic; struct ieee80211_wme_state *wme = &ic->ic_wme; const paramType *pPhyParam, *pBssPhyParam; struct wmeParams *wmep; enum ieee80211_phymode mode; int i; IEEE80211_LOCK_ASSERT(ic); if ((ic->ic_caps & IEEE80211_C_WME) == 0 || ic->ic_nrunning > 1) return; /* * Clear the wme cap_info field so a qoscount from a previous * vap doesn't confuse later code which only parses the beacon * field and updates hardware when said field changes. * Otherwise the hardware is programmed with defaults, not what * the beacon actually announces. */ wme->wme_wmeChanParams.cap_info = 0; /* * Select mode; we can be called early in which case we * always use auto mode. We know we'll be called when * entering the RUN state with bsschan setup properly * so state will eventually get set correctly */ if (ic->ic_bsschan != IEEE80211_CHAN_ANYC) mode = ieee80211_chan2mode(ic->ic_bsschan); else mode = IEEE80211_MODE_AUTO; for (i = 0; i < WME_NUM_AC; i++) { switch (i) { case WME_AC_BK: pPhyParam = &phyParamForAC_BK[mode]; pBssPhyParam = &phyParamForAC_BK[mode]; break; case WME_AC_VI: pPhyParam = &phyParamForAC_VI[mode]; pBssPhyParam = &bssPhyParamForAC_VI[mode]; break; case WME_AC_VO: pPhyParam = &phyParamForAC_VO[mode]; pBssPhyParam = &bssPhyParamForAC_VO[mode]; break; case WME_AC_BE: default: pPhyParam = &phyParamForAC_BE[mode]; pBssPhyParam = &bssPhyParamForAC_BE[mode]; break; } wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; if (ic->ic_opmode == IEEE80211_M_HOSTAP) { setwmeparams(vap, "chan", i, wmep, pPhyParam); } else { setwmeparams(vap, "chan", i, wmep, pBssPhyParam); } wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i]; setwmeparams(vap, "bss ", i, wmep, pBssPhyParam); } /* NB: check ic_bss to avoid NULL deref on initial attach */ if (vap->iv_bss != NULL) { /* * Calculate agressive mode switching threshold based * on beacon interval. This doesn't need locking since * we're only called before entering the RUN state at * which point we start sending beacon frames. */ wme->wme_hipri_switch_thresh = (HIGH_PRI_SWITCH_THRESH * vap->iv_bss->ni_intval) / 100; wme->wme_flags &= ~WME_F_AGGRMODE; ieee80211_wme_updateparams(vap); } } void ieee80211_wme_initparams(struct ieee80211vap *vap) { struct ieee80211com *ic = vap->iv_ic; IEEE80211_LOCK(ic); ieee80211_wme_initparams_locked(vap); IEEE80211_UNLOCK(ic); } /* * Update WME parameters for ourself and the BSS. */ void ieee80211_wme_updateparams_locked(struct ieee80211vap *vap) { static const paramType aggrParam[IEEE80211_MODE_MAX] = { [IEEE80211_MODE_AUTO] = { 2, 4, 10, 64, 0 }, [IEEE80211_MODE_11A] = { 2, 4, 10, 64, 0 }, [IEEE80211_MODE_11B] = { 2, 5, 10, 64, 0 }, [IEEE80211_MODE_11G] = { 2, 4, 10, 64, 0 }, [IEEE80211_MODE_FH] = { 2, 5, 10, 64, 0 }, [IEEE80211_MODE_TURBO_A] = { 1, 3, 10, 64, 0 }, [IEEE80211_MODE_TURBO_G] = { 1, 3, 10, 64, 0 }, [IEEE80211_MODE_STURBO_A] = { 1, 3, 10, 64, 0 }, [IEEE80211_MODE_HALF] = { 2, 4, 10, 64, 0 }, [IEEE80211_MODE_QUARTER] = { 2, 4, 10, 64, 0 }, [IEEE80211_MODE_11NA] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/ [IEEE80211_MODE_11NG] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/ }; struct ieee80211com *ic = vap->iv_ic; struct ieee80211_wme_state *wme = &ic->ic_wme; const struct wmeParams *wmep; struct wmeParams *chanp, *bssp; enum ieee80211_phymode mode; int i; int do_aggrmode = 0; /* * Set up the channel access parameters for the physical * device. First populate the configured settings. */ for (i = 0; i < WME_NUM_AC; i++) { chanp = &wme->wme_chanParams.cap_wmeParams[i]; wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; chanp->wmep_aifsn = wmep->wmep_aifsn; chanp->wmep_logcwmin = wmep->wmep_logcwmin; chanp->wmep_logcwmax = wmep->wmep_logcwmax; chanp->wmep_txopLimit = wmep->wmep_txopLimit; chanp = &wme->wme_bssChanParams.cap_wmeParams[i]; wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i]; chanp->wmep_aifsn = wmep->wmep_aifsn; chanp->wmep_logcwmin = wmep->wmep_logcwmin; chanp->wmep_logcwmax = wmep->wmep_logcwmax; chanp->wmep_txopLimit = wmep->wmep_txopLimit; } /* * Select mode; we can be called early in which case we * always use auto mode. We know we'll be called when * entering the RUN state with bsschan setup properly * so state will eventually get set correctly */ if (ic->ic_bsschan != IEEE80211_CHAN_ANYC) mode = ieee80211_chan2mode(ic->ic_bsschan); else mode = IEEE80211_MODE_AUTO; /* * This implements agressive mode as found in certain * vendors' AP's. When there is significant high * priority (VI/VO) traffic in the BSS throttle back BE * traffic by using conservative parameters. Otherwise * BE uses agressive params to optimize performance of * legacy/non-QoS traffic. */ /* Hostap? Only if aggressive mode is enabled */ if (vap->iv_opmode == IEEE80211_M_HOSTAP && (wme->wme_flags & WME_F_AGGRMODE) != 0) do_aggrmode = 1; /* * Station? Only if we're in a non-QoS BSS. */ else if ((vap->iv_opmode == IEEE80211_M_STA && (vap->iv_bss->ni_flags & IEEE80211_NODE_QOS) == 0)) do_aggrmode = 1; /* * IBSS? Only if we we have WME enabled. */ else if ((vap->iv_opmode == IEEE80211_M_IBSS) && (vap->iv_flags & IEEE80211_F_WME)) do_aggrmode = 1; /* * If WME is disabled on this VAP, default to aggressive mode * regardless of the configuration. */ if ((vap->iv_flags & IEEE80211_F_WME) == 0) do_aggrmode = 1; /* XXX WDS? */ /* XXX MBSS? */ if (do_aggrmode) { chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE]; bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE]; chanp->wmep_aifsn = bssp->wmep_aifsn = aggrParam[mode].aifsn; chanp->wmep_logcwmin = bssp->wmep_logcwmin = aggrParam[mode].logcwmin; chanp->wmep_logcwmax = bssp->wmep_logcwmax = aggrParam[mode].logcwmax; chanp->wmep_txopLimit = bssp->wmep_txopLimit = (vap->iv_flags & IEEE80211_F_BURST) ? aggrParam[mode].txopLimit : 0; IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, "update %s (chan+bss) [acm %u aifsn %u logcwmin %u " "logcwmax %u txop %u]\n", ieee80211_wme_acnames[WME_AC_BE], chanp->wmep_acm, chanp->wmep_aifsn, chanp->wmep_logcwmin, chanp->wmep_logcwmax, chanp->wmep_txopLimit); } /* * Change the contention window based on the number of associated * stations. If the number of associated stations is 1 and * aggressive mode is enabled, lower the contention window even * further. */ if (vap->iv_opmode == IEEE80211_M_HOSTAP && ic->ic_sta_assoc < 2 && (wme->wme_flags & WME_F_AGGRMODE) != 0) { static const uint8_t logCwMin[IEEE80211_MODE_MAX] = { [IEEE80211_MODE_AUTO] = 3, [IEEE80211_MODE_11A] = 3, [IEEE80211_MODE_11B] = 4, [IEEE80211_MODE_11G] = 3, [IEEE80211_MODE_FH] = 4, [IEEE80211_MODE_TURBO_A] = 3, [IEEE80211_MODE_TURBO_G] = 3, [IEEE80211_MODE_STURBO_A] = 3, [IEEE80211_MODE_HALF] = 3, [IEEE80211_MODE_QUARTER] = 3, [IEEE80211_MODE_11NA] = 3, [IEEE80211_MODE_11NG] = 3, }; chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE]; bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE]; chanp->wmep_logcwmin = bssp->wmep_logcwmin = logCwMin[mode]; IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, "update %s (chan+bss) logcwmin %u\n", ieee80211_wme_acnames[WME_AC_BE], chanp->wmep_logcwmin); } /* * Arrange for the beacon update. * * XXX what about MBSS, WDS? */ if (vap->iv_opmode == IEEE80211_M_HOSTAP || vap->iv_opmode == IEEE80211_M_IBSS) { /* * Arrange for a beacon update and bump the parameter * set number so associated stations load the new values. */ wme->wme_bssChanParams.cap_info = (wme->wme_bssChanParams.cap_info+1) & WME_QOSINFO_COUNT; ieee80211_beacon_notify(vap, IEEE80211_BEACON_WME); } /* schedule the deferred WME update */ ieee80211_runtask(ic, &ic->ic_wme_task); IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, "%s: WME params updated, cap_info 0x%x\n", __func__, vap->iv_opmode == IEEE80211_M_STA ? wme->wme_wmeChanParams.cap_info : wme->wme_bssChanParams.cap_info); } void ieee80211_wme_updateparams(struct ieee80211vap *vap) { struct ieee80211com *ic = vap->iv_ic; if (ic->ic_caps & IEEE80211_C_WME) { IEEE80211_LOCK(ic); ieee80211_wme_updateparams_locked(vap); IEEE80211_UNLOCK(ic); } } static void parent_updown(void *arg, int npending) { struct ieee80211com *ic = arg; ic->ic_parent(ic); } static void update_mcast(void *arg, int npending) { struct ieee80211com *ic = arg; ic->ic_update_mcast(ic); } static void update_promisc(void *arg, int npending) { struct ieee80211com *ic = arg; ic->ic_update_promisc(ic); } static void update_channel(void *arg, int npending) { struct ieee80211com *ic = arg; ic->ic_set_channel(ic); ieee80211_radiotap_chan_change(ic); } static void update_chw(void *arg, int npending) { struct ieee80211com *ic = arg; /* * XXX should we defer the channel width _config_ update until now? */ ic->ic_update_chw(ic); } static void update_wme(void *arg, int npending) { struct ieee80211com *ic = arg; /* * XXX should we defer the WME configuration update until now? */ ic->ic_wme.wme_update(ic); } static void restart_vaps(void *arg, int npending) { struct ieee80211com *ic = arg; ieee80211_suspend_all(ic); ieee80211_resume_all(ic); } /* * Block until the parent is in a known state. This is * used after any operations that dispatch a task (e.g. * to auto-configure the parent device up/down). */ void ieee80211_waitfor_parent(struct ieee80211com *ic) { taskqueue_block(ic->ic_tq); ieee80211_draintask(ic, &ic->ic_parent_task); ieee80211_draintask(ic, &ic->ic_mcast_task); ieee80211_draintask(ic, &ic->ic_promisc_task); ieee80211_draintask(ic, &ic->ic_chan_task); ieee80211_draintask(ic, &ic->ic_bmiss_task); ieee80211_draintask(ic, &ic->ic_chw_task); ieee80211_draintask(ic, &ic->ic_wme_task); taskqueue_unblock(ic->ic_tq); } /* * Check to see whether the current channel needs reset. * * Some devices don't handle being given an invalid channel * in their operating mode very well (eg wpi(4) will throw a * firmware exception.) * * Return 0 if we're ok, 1 if the channel needs to be reset. * * See PR kern/202502. */ static int ieee80211_start_check_reset_chan(struct ieee80211vap *vap) { struct ieee80211com *ic = vap->iv_ic; if ((vap->iv_opmode == IEEE80211_M_IBSS && IEEE80211_IS_CHAN_NOADHOC(ic->ic_curchan)) || (vap->iv_opmode == IEEE80211_M_HOSTAP && IEEE80211_IS_CHAN_NOHOSTAP(ic->ic_curchan))) return (1); return (0); } /* * Reset the curchan to a known good state. */ static void ieee80211_start_reset_chan(struct ieee80211vap *vap) { struct ieee80211com *ic = vap->iv_ic; ic->ic_curchan = &ic->ic_channels[0]; } /* * Start a vap running. If this is the first vap to be * set running on the underlying device then we * automatically bring the device up. */ void ieee80211_start_locked(struct ieee80211vap *vap) { struct ifnet *ifp = vap->iv_ifp; struct ieee80211com *ic = vap->iv_ic; IEEE80211_LOCK_ASSERT(ic); IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, "start running, %d vaps running\n", ic->ic_nrunning); if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { /* * Mark us running. Note that it's ok to do this first; * if we need to bring the parent device up we defer that * to avoid dropping the com lock. We expect the device * to respond to being marked up by calling back into us * through ieee80211_start_all at which point we'll come * back in here and complete the work. */ ifp->if_drv_flags |= IFF_DRV_RUNNING; /* * We are not running; if this we are the first vap * to be brought up auto-up the parent if necessary. */ if (ic->ic_nrunning++ == 0) { /* reset the channel to a known good channel */ if (ieee80211_start_check_reset_chan(vap)) ieee80211_start_reset_chan(vap); IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, "%s: up parent %s\n", __func__, ic->ic_name); ieee80211_runtask(ic, &ic->ic_parent_task); return; } } /* * If the parent is up and running, then kick the * 802.11 state machine as appropriate. */ if (vap->iv_roaming != IEEE80211_ROAMING_MANUAL) { if (vap->iv_opmode == IEEE80211_M_STA) { #if 0 /* XXX bypasses scan too easily; disable for now */ /* * Try to be intelligent about clocking the state * machine. If we're currently in RUN state then * we should be able to apply any new state/parameters * simply by re-associating. Otherwise we need to * re-scan to select an appropriate ap. */ if (vap->iv_state >= IEEE80211_S_RUN) ieee80211_new_state_locked(vap, IEEE80211_S_ASSOC, 1); else #endif ieee80211_new_state_locked(vap, IEEE80211_S_SCAN, 0); } else { /* * For monitor+wds mode there's nothing to do but * start running. Otherwise if this is the first * vap to be brought up, start a scan which may be * preempted if the station is locked to a particular * channel. */ vap->iv_flags_ext |= IEEE80211_FEXT_REINIT; if (vap->iv_opmode == IEEE80211_M_MONITOR || vap->iv_opmode == IEEE80211_M_WDS) ieee80211_new_state_locked(vap, IEEE80211_S_RUN, -1); else ieee80211_new_state_locked(vap, IEEE80211_S_SCAN, 0); } } } /* * Start a single vap. */ void ieee80211_init(void *arg) { struct ieee80211vap *vap = arg; IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, "%s\n", __func__); IEEE80211_LOCK(vap->iv_ic); ieee80211_start_locked(vap); IEEE80211_UNLOCK(vap->iv_ic); } /* * Start all runnable vap's on a device. */ void ieee80211_start_all(struct ieee80211com *ic) { struct ieee80211vap *vap; IEEE80211_LOCK(ic); TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { struct ifnet *ifp = vap->iv_ifp; if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */ ieee80211_start_locked(vap); } IEEE80211_UNLOCK(ic); } /* * Stop a vap. We force it down using the state machine * then mark it's ifnet not running. If this is the last * vap running on the underlying device then we close it * too to insure it will be properly initialized when the * next vap is brought up. */ void ieee80211_stop_locked(struct ieee80211vap *vap) { struct ieee80211com *ic = vap->iv_ic; struct ifnet *ifp = vap->iv_ifp; IEEE80211_LOCK_ASSERT(ic); IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, "stop running, %d vaps running\n", ic->ic_nrunning); ieee80211_new_state_locked(vap, IEEE80211_S_INIT, -1); if (ifp->if_drv_flags & IFF_DRV_RUNNING) { ifp->if_drv_flags &= ~IFF_DRV_RUNNING; /* mark us stopped */ if (--ic->ic_nrunning == 0) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, "down parent %s\n", ic->ic_name); ieee80211_runtask(ic, &ic->ic_parent_task); } } } void ieee80211_stop(struct ieee80211vap *vap) { struct ieee80211com *ic = vap->iv_ic; IEEE80211_LOCK(ic); ieee80211_stop_locked(vap); IEEE80211_UNLOCK(ic); } /* * Stop all vap's running on a device. */ void ieee80211_stop_all(struct ieee80211com *ic) { struct ieee80211vap *vap; IEEE80211_LOCK(ic); TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { struct ifnet *ifp = vap->iv_ifp; if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */ ieee80211_stop_locked(vap); } IEEE80211_UNLOCK(ic); ieee80211_waitfor_parent(ic); } /* * Stop all vap's running on a device and arrange * for those that were running to be resumed. */ void ieee80211_suspend_all(struct ieee80211com *ic) { struct ieee80211vap *vap; IEEE80211_LOCK(ic); TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { struct ifnet *ifp = vap->iv_ifp; if (IFNET_IS_UP_RUNNING(ifp)) { /* NB: avoid recursion */ vap->iv_flags_ext |= IEEE80211_FEXT_RESUME; ieee80211_stop_locked(vap); } } IEEE80211_UNLOCK(ic); ieee80211_waitfor_parent(ic); } /* * Start all vap's marked for resume. */ void ieee80211_resume_all(struct ieee80211com *ic) { struct ieee80211vap *vap; IEEE80211_LOCK(ic); TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { struct ifnet *ifp = vap->iv_ifp; if (!IFNET_IS_UP_RUNNING(ifp) && (vap->iv_flags_ext & IEEE80211_FEXT_RESUME)) { vap->iv_flags_ext &= ~IEEE80211_FEXT_RESUME; ieee80211_start_locked(vap); } } IEEE80211_UNLOCK(ic); } /* * Restart all vap's running on a device. */ void ieee80211_restart_all(struct ieee80211com *ic) { /* * NB: do not use ieee80211_runtask here, we will * block & drain net80211 taskqueue. */ taskqueue_enqueue(taskqueue_thread, &ic->ic_restart_task); } void ieee80211_beacon_miss(struct ieee80211com *ic) { IEEE80211_LOCK(ic); if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { /* Process in a taskq, the handler may reenter the driver */ ieee80211_runtask(ic, &ic->ic_bmiss_task); } IEEE80211_UNLOCK(ic); } static void beacon_miss(void *arg, int npending) { struct ieee80211com *ic = arg; struct ieee80211vap *vap; IEEE80211_LOCK(ic); TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { /* * We only pass events through for sta vap's in RUN+ state; * may be too restrictive but for now this saves all the * handlers duplicating these checks. */ if (vap->iv_opmode == IEEE80211_M_STA && vap->iv_state >= IEEE80211_S_RUN && vap->iv_bmiss != NULL) vap->iv_bmiss(vap); } IEEE80211_UNLOCK(ic); } static void beacon_swmiss(void *arg, int npending) { struct ieee80211vap *vap = arg; struct ieee80211com *ic = vap->iv_ic; IEEE80211_LOCK(ic); if (vap->iv_state >= IEEE80211_S_RUN) { /* XXX Call multiple times if npending > zero? */ vap->iv_bmiss(vap); } IEEE80211_UNLOCK(ic); } /* * Software beacon miss handling. Check if any beacons * were received in the last period. If not post a * beacon miss; otherwise reset the counter. */ void ieee80211_swbmiss(void *arg) { struct ieee80211vap *vap = arg; struct ieee80211com *ic = vap->iv_ic; IEEE80211_LOCK_ASSERT(ic); KASSERT(vap->iv_state >= IEEE80211_S_RUN, ("wrong state %d", vap->iv_state)); if (ic->ic_flags & IEEE80211_F_SCAN) { /* * If scanning just ignore and reset state. If we get a * bmiss after coming out of scan because we haven't had * time to receive a beacon then we should probe the AP * before posting a real bmiss (unless iv_bmiss_max has * been artifiically lowered). A cleaner solution might * be to disable the timer on scan start/end but to handle * case of multiple sta vap's we'd need to disable the * timers of all affected vap's. */ vap->iv_swbmiss_count = 0; } else if (vap->iv_swbmiss_count == 0) { if (vap->iv_bmiss != NULL) ieee80211_runtask(ic, &vap->iv_swbmiss_task); } else vap->iv_swbmiss_count = 0; callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, ieee80211_swbmiss, vap); } /* * Start an 802.11h channel switch. We record the parameters, * mark the operation pending, notify each vap through the * beacon update mechanism so it can update the beacon frame * contents, and then switch vap's to CSA state to block outbound * traffic. Devices that handle CSA directly can use the state * switch to do the right thing so long as they call * ieee80211_csa_completeswitch when it's time to complete the * channel change. Devices that depend on the net80211 layer can * use ieee80211_beacon_update to handle the countdown and the * channel switch. */ void ieee80211_csa_startswitch(struct ieee80211com *ic, struct ieee80211_channel *c, int mode, int count) { struct ieee80211vap *vap; IEEE80211_LOCK_ASSERT(ic); ic->ic_csa_newchan = c; ic->ic_csa_mode = mode; ic->ic_csa_count = count; ic->ic_flags |= IEEE80211_F_CSAPENDING; TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { if (vap->iv_opmode == IEEE80211_M_HOSTAP || vap->iv_opmode == IEEE80211_M_IBSS || vap->iv_opmode == IEEE80211_M_MBSS) ieee80211_beacon_notify(vap, IEEE80211_BEACON_CSA); /* switch to CSA state to block outbound traffic */ if (vap->iv_state == IEEE80211_S_RUN) ieee80211_new_state_locked(vap, IEEE80211_S_CSA, 0); } ieee80211_notify_csa(ic, c, mode, count); } /* * Complete the channel switch by transitioning all CSA VAPs to RUN. * This is called by both the completion and cancellation functions * so each VAP is placed back in the RUN state and can thus transmit. */ static void csa_completeswitch(struct ieee80211com *ic) { struct ieee80211vap *vap; ic->ic_csa_newchan = NULL; ic->ic_flags &= ~IEEE80211_F_CSAPENDING; TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) if (vap->iv_state == IEEE80211_S_CSA) ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0); } /* * Complete an 802.11h channel switch started by ieee80211_csa_startswitch. * We clear state and move all vap's in CSA state to RUN state * so they can again transmit. * * Although this may not be completely correct, update the BSS channel * for each VAP to the newly configured channel. The setcurchan sets * the current operating channel for the interface (so the radio does * switch over) but the VAP BSS isn't updated, leading to incorrectly * reported information via ioctl. */ void ieee80211_csa_completeswitch(struct ieee80211com *ic) { struct ieee80211vap *vap; IEEE80211_LOCK_ASSERT(ic); KASSERT(ic->ic_flags & IEEE80211_F_CSAPENDING, ("csa not pending")); ieee80211_setcurchan(ic, ic->ic_csa_newchan); TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) if (vap->iv_state == IEEE80211_S_CSA) vap->iv_bss->ni_chan = ic->ic_curchan; csa_completeswitch(ic); } /* * Cancel an 802.11h channel switch started by ieee80211_csa_startswitch. * We clear state and move all vap's in CSA state to RUN state * so they can again transmit. */ void ieee80211_csa_cancelswitch(struct ieee80211com *ic) { IEEE80211_LOCK_ASSERT(ic); csa_completeswitch(ic); } /* * Complete a DFS CAC started by ieee80211_dfs_cac_start. * We clear state and move all vap's in CAC state to RUN state. */ void ieee80211_cac_completeswitch(struct ieee80211vap *vap0) { struct ieee80211com *ic = vap0->iv_ic; struct ieee80211vap *vap; IEEE80211_LOCK(ic); /* * Complete CAC state change for lead vap first; then * clock all the other vap's waiting. */ KASSERT(vap0->iv_state == IEEE80211_S_CAC, ("wrong state %d", vap0->iv_state)); ieee80211_new_state_locked(vap0, IEEE80211_S_RUN, 0); TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) if (vap->iv_state == IEEE80211_S_CAC) ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0); IEEE80211_UNLOCK(ic); } /* * Force all vap's other than the specified vap to the INIT state * and mark them as waiting for a scan to complete. These vaps * will be brought up when the scan completes and the scanning vap * reaches RUN state by wakeupwaiting. */ static void markwaiting(struct ieee80211vap *vap0) { struct ieee80211com *ic = vap0->iv_ic; struct ieee80211vap *vap; IEEE80211_LOCK_ASSERT(ic); /* * A vap list entry can not disappear since we are running on the * taskqueue and a vap destroy will queue and drain another state * change task. */ TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { if (vap == vap0) continue; if (vap->iv_state != IEEE80211_S_INIT) { /* NB: iv_newstate may drop the lock */ vap->iv_newstate(vap, IEEE80211_S_INIT, 0); IEEE80211_LOCK_ASSERT(ic); vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; } } } /* * Wakeup all vap's waiting for a scan to complete. This is the * companion to markwaiting (above) and is used to coordinate * multiple vaps scanning. * This is called from the state taskqueue. */ static void wakeupwaiting(struct ieee80211vap *vap0) { struct ieee80211com *ic = vap0->iv_ic; struct ieee80211vap *vap; IEEE80211_LOCK_ASSERT(ic); /* * A vap list entry can not disappear since we are running on the * taskqueue and a vap destroy will queue and drain another state * change task. */ TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { if (vap == vap0) continue; if (vap->iv_flags_ext & IEEE80211_FEXT_SCANWAIT) { vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT; /* NB: sta's cannot go INIT->RUN */ /* NB: iv_newstate may drop the lock */ vap->iv_newstate(vap, vap->iv_opmode == IEEE80211_M_STA ? IEEE80211_S_SCAN : IEEE80211_S_RUN, 0); IEEE80211_LOCK_ASSERT(ic); } } } /* * Handle post state change work common to all operating modes. */ static void ieee80211_newstate_cb(void *xvap, int npending) { struct ieee80211vap *vap = xvap; struct ieee80211com *ic = vap->iv_ic; enum ieee80211_state nstate, ostate; int arg, rc; IEEE80211_LOCK(ic); nstate = vap->iv_nstate; arg = vap->iv_nstate_arg; if (vap->iv_flags_ext & IEEE80211_FEXT_REINIT) { /* * We have been requested to drop back to the INIT before * proceeding to the new state. */ /* Deny any state changes while we are here. */ vap->iv_nstate = IEEE80211_S_INIT; IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s arg %d\n", __func__, ieee80211_state_name[vap->iv_state], ieee80211_state_name[vap->iv_nstate], arg); vap->iv_newstate(vap, vap->iv_nstate, 0); IEEE80211_LOCK_ASSERT(ic); vap->iv_flags_ext &= ~(IEEE80211_FEXT_REINIT | IEEE80211_FEXT_STATEWAIT); /* enqueue new state transition after cancel_scan() task */ ieee80211_new_state_locked(vap, nstate, arg); goto done; } ostate = vap->iv_state; if (nstate == IEEE80211_S_SCAN && ostate != IEEE80211_S_INIT) { /* * SCAN was forced; e.g. on beacon miss. Force other running * vap's to INIT state and mark them as waiting for the scan to * complete. This insures they don't interfere with our * scanning. Since we are single threaded the vaps can not * transition again while we are executing. * * XXX not always right, assumes ap follows sta */ markwaiting(vap); } IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s arg %d\n", __func__, ieee80211_state_name[ostate], ieee80211_state_name[nstate], arg); rc = vap->iv_newstate(vap, nstate, arg); IEEE80211_LOCK_ASSERT(ic); vap->iv_flags_ext &= ~IEEE80211_FEXT_STATEWAIT; if (rc != 0) { /* State transition failed */ KASSERT(rc != EINPROGRESS, ("iv_newstate was deferred")); KASSERT(nstate != IEEE80211_S_INIT, ("INIT state change failed")); IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s returned error %d\n", __func__, ieee80211_state_name[nstate], rc); goto done; } /* No actual transition, skip post processing */ if (ostate == nstate) goto done; if (nstate == IEEE80211_S_RUN) { /* * OACTIVE may be set on the vap if the upper layer * tried to transmit (e.g. IPv6 NDP) before we reach * RUN state. Clear it and restart xmit. * * Note this can also happen as a result of SLEEP->RUN * (i.e. coming out of power save mode). */ vap->iv_ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; /* * XXX TODO Kick-start a VAP queue - this should be a method! */ /* bring up any vaps waiting on us */ wakeupwaiting(vap); } else if (nstate == IEEE80211_S_INIT) { /* * Flush the scan cache if we did the last scan (XXX?) * and flush any frames on send queues from this vap. * Note the mgt q is used only for legacy drivers and * will go away shortly. */ ieee80211_scan_flush(vap); /* * XXX TODO: ic/vap queue flush */ } done: IEEE80211_UNLOCK(ic); } /* * Public interface for initiating a state machine change. * This routine single-threads the request and coordinates * the scheduling of multiple vaps for the purpose of selecting * an operating channel. Specifically the following scenarios * are handled: * o only one vap can be selecting a channel so on transition to * SCAN state if another vap is already scanning then * mark the caller for later processing and return without * doing anything (XXX? expectations by caller of synchronous operation) * o only one vap can be doing CAC of a channel so on transition to * CAC state if another vap is already scanning for radar then * mark the caller for later processing and return without * doing anything (XXX? expectations by caller of synchronous operation) * o if another vap is already running when a request is made * to SCAN then an operating channel has been chosen; bypass * the scan and just join the channel * * Note that the state change call is done through the iv_newstate * method pointer so any driver routine gets invoked. The driver * will normally call back into operating mode-specific * ieee80211_newstate routines (below) unless it needs to completely * bypass the state machine (e.g. because the firmware has it's * own idea how things should work). Bypassing the net80211 layer * is usually a mistake and indicates lack of proper integration * with the net80211 layer. */ int ieee80211_new_state_locked(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) { struct ieee80211com *ic = vap->iv_ic; struct ieee80211vap *vp; enum ieee80211_state ostate; int nrunning, nscanning; IEEE80211_LOCK_ASSERT(ic); if (vap->iv_flags_ext & IEEE80211_FEXT_STATEWAIT) { if (vap->iv_nstate == IEEE80211_S_INIT || ((vap->iv_state == IEEE80211_S_INIT || (vap->iv_flags_ext & IEEE80211_FEXT_REINIT)) && vap->iv_nstate == IEEE80211_S_SCAN && nstate > IEEE80211_S_SCAN)) { /* * XXX The vap is being stopped/started, * do not allow any other state changes * until this is completed. */ IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%s) transition discarded\n", __func__, ieee80211_state_name[vap->iv_state], ieee80211_state_name[nstate], ieee80211_state_name[vap->iv_nstate]); return -1; } else if (vap->iv_state != vap->iv_nstate) { #if 0 /* Warn if the previous state hasn't completed. */ IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: pending %s -> %s transition lost\n", __func__, ieee80211_state_name[vap->iv_state], ieee80211_state_name[vap->iv_nstate]); #else /* XXX temporarily enable to identify issues */ if_printf(vap->iv_ifp, "%s: pending %s -> %s transition lost\n", __func__, ieee80211_state_name[vap->iv_state], ieee80211_state_name[vap->iv_nstate]); #endif } } nrunning = nscanning = 0; /* XXX can track this state instead of calculating */ TAILQ_FOREACH(vp, &ic->ic_vaps, iv_next) { if (vp != vap) { if (vp->iv_state >= IEEE80211_S_RUN) nrunning++; /* XXX doesn't handle bg scan */ /* NB: CAC+AUTH+ASSOC treated like SCAN */ else if (vp->iv_state > IEEE80211_S_INIT) nscanning++; } } ostate = vap->iv_state; IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (nrunning %d nscanning %d)\n", __func__, ieee80211_state_name[ostate], ieee80211_state_name[nstate], nrunning, nscanning); switch (nstate) { case IEEE80211_S_SCAN: if (ostate == IEEE80211_S_INIT) { /* * INIT -> SCAN happens on initial bringup. */ KASSERT(!(nscanning && nrunning), ("%d scanning and %d running", nscanning, nrunning)); if (nscanning) { /* * Someone is scanning, defer our state * change until the work has completed. */ IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: defer %s -> %s\n", __func__, ieee80211_state_name[ostate], ieee80211_state_name[nstate]); vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; return 0; } if (nrunning) { /* * Someone is operating; just join the channel * they have chosen. */ /* XXX kill arg? */ /* XXX check each opmode, adhoc? */ if (vap->iv_opmode == IEEE80211_M_STA) nstate = IEEE80211_S_SCAN; else nstate = IEEE80211_S_RUN; #ifdef IEEE80211_DEBUG if (nstate != IEEE80211_S_SCAN) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: override, now %s -> %s\n", __func__, ieee80211_state_name[ostate], ieee80211_state_name[nstate]); } #endif } } break; case IEEE80211_S_RUN: if (vap->iv_opmode == IEEE80211_M_WDS && (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) && nscanning) { /* * Legacy WDS with someone else scanning; don't * go online until that completes as we should * follow the other vap to the channel they choose. */ IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: defer %s -> %s (legacy WDS)\n", __func__, ieee80211_state_name[ostate], ieee80211_state_name[nstate]); vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT; return 0; } if (vap->iv_opmode == IEEE80211_M_HOSTAP && IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) && (vap->iv_flags_ext & IEEE80211_FEXT_DFS) && !IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) { /* * This is a DFS channel, transition to CAC state * instead of RUN. This allows us to initiate * Channel Availability Check (CAC) as specified * by 11h/DFS. */ nstate = IEEE80211_S_CAC; IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: override %s -> %s (DFS)\n", __func__, ieee80211_state_name[ostate], ieee80211_state_name[nstate]); } break; case IEEE80211_S_INIT: /* cancel any scan in progress */ ieee80211_cancel_scan(vap); if (ostate == IEEE80211_S_INIT ) { /* XXX don't believe this */ /* INIT -> INIT. nothing to do */ vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT; } /* fall thru... */ default: break; } /* defer the state change to a thread */ vap->iv_nstate = nstate; vap->iv_nstate_arg = arg; vap->iv_flags_ext |= IEEE80211_FEXT_STATEWAIT; ieee80211_runtask(ic, &vap->iv_nstate_task); return EINPROGRESS; } int ieee80211_new_state(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) { struct ieee80211com *ic = vap->iv_ic; int rc; IEEE80211_LOCK(ic); rc = ieee80211_new_state_locked(vap, nstate, arg); IEEE80211_UNLOCK(ic); return rc; } Index: head/sys/net80211/ieee80211_proto.h =================================================================== --- head/sys/net80211/ieee80211_proto.h (revision 298375) +++ head/sys/net80211/ieee80211_proto.h (revision 298376) @@ -1,416 +1,431 @@ /*- * Copyright (c) 2001 Atsushi Onoe * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * $FreeBSD$ */ #ifndef _NET80211_IEEE80211_PROTO_H_ #define _NET80211_IEEE80211_PROTO_H_ /* * 802.11 protocol implementation definitions. */ enum ieee80211_state { IEEE80211_S_INIT = 0, /* default state */ IEEE80211_S_SCAN = 1, /* scanning */ IEEE80211_S_AUTH = 2, /* try to authenticate */ IEEE80211_S_ASSOC = 3, /* try to assoc */ IEEE80211_S_CAC = 4, /* doing channel availability check */ IEEE80211_S_RUN = 5, /* operational (e.g. associated) */ IEEE80211_S_CSA = 6, /* channel switch announce pending */ IEEE80211_S_SLEEP = 7, /* power save */ }; #define IEEE80211_S_MAX (IEEE80211_S_SLEEP+1) #define IEEE80211_SEND_MGMT(_ni,_type,_arg) \ ((*(_ni)->ni_ic->ic_send_mgmt)(_ni, _type, _arg)) -extern const char *ieee80211_mgt_subtype_name[]; +extern const char *mgt_subtype_name[]; +extern const char *ctl_subtype_name[]; extern const char *ieee80211_phymode_name[IEEE80211_MODE_MAX]; extern const int ieee80211_opcap[IEEE80211_OPMODE_MAX]; + +static __inline const char * +ieee80211_mgt_subtype_name(uint8_t subtype) +{ + return mgt_subtype_name[(subtype & IEEE80211_FC0_SUBTYPE_MASK) >> + IEEE80211_FC0_SUBTYPE_SHIFT]; +} + +static __inline const char * +ieee80211_ctl_subtype_name(uint8_t subtype) +{ + return ctl_subtype_name[(subtype & IEEE80211_FC0_SUBTYPE_MASK) >> + IEEE80211_FC0_SUBTYPE_SHIFT]; +} const char *ieee80211_reason_to_string(uint16_t); void ieee80211_proto_attach(struct ieee80211com *); void ieee80211_proto_detach(struct ieee80211com *); void ieee80211_proto_vattach(struct ieee80211vap *); void ieee80211_proto_vdetach(struct ieee80211vap *); void ieee80211_promisc(struct ieee80211vap *, bool); void ieee80211_allmulti(struct ieee80211vap *, bool); void ieee80211_syncflag(struct ieee80211vap *, int flag); void ieee80211_syncflag_ht(struct ieee80211vap *, int flag); void ieee80211_syncflag_ext(struct ieee80211vap *, int flag); #define ieee80211_input(ni, m, rssi, nf) \ ((ni)->ni_vap->iv_input(ni, m, NULL, rssi, nf)) int ieee80211_input_all(struct ieee80211com *, struct mbuf *, int, int); int ieee80211_input_mimo(struct ieee80211_node *, struct mbuf *, struct ieee80211_rx_stats *); int ieee80211_input_mimo_all(struct ieee80211com *, struct mbuf *, struct ieee80211_rx_stats *); struct ieee80211_bpf_params; int ieee80211_mgmt_output(struct ieee80211_node *, struct mbuf *, int, struct ieee80211_bpf_params *); int ieee80211_raw_xmit(struct ieee80211_node *, struct mbuf *, const struct ieee80211_bpf_params *); int ieee80211_output(struct ifnet *, struct mbuf *, const struct sockaddr *, struct route *ro); int ieee80211_vap_pkt_send_dest(struct ieee80211vap *, struct mbuf *, struct ieee80211_node *); int ieee80211_raw_output(struct ieee80211vap *, struct ieee80211_node *, struct mbuf *, const struct ieee80211_bpf_params *); void ieee80211_send_setup(struct ieee80211_node *, struct mbuf *, int, int, const uint8_t [IEEE80211_ADDR_LEN], const uint8_t [IEEE80211_ADDR_LEN], const uint8_t [IEEE80211_ADDR_LEN]); int ieee80211_vap_transmit(struct ifnet *ifp, struct mbuf *m); void ieee80211_vap_qflush(struct ifnet *ifp); int ieee80211_send_nulldata(struct ieee80211_node *); int ieee80211_classify(struct ieee80211_node *, struct mbuf *m); struct mbuf *ieee80211_mbuf_adjust(struct ieee80211vap *, int, struct ieee80211_key *, struct mbuf *); struct mbuf *ieee80211_encap(struct ieee80211vap *, struct ieee80211_node *, struct mbuf *); void ieee80211_free_mbuf(struct mbuf *); int ieee80211_send_mgmt(struct ieee80211_node *, int, int); struct ieee80211_appie; int ieee80211_send_probereq(struct ieee80211_node *ni, const uint8_t sa[IEEE80211_ADDR_LEN], const uint8_t da[IEEE80211_ADDR_LEN], const uint8_t bssid[IEEE80211_ADDR_LEN], const uint8_t *ssid, size_t ssidlen); struct mbuf * ieee80211_ff_encap1(struct ieee80211vap *, struct mbuf *, const struct ether_header *); void ieee80211_tx_complete(struct ieee80211_node *, struct mbuf *, int); /* * The formation of ProbeResponse frames requires guidance to * deal with legacy clients. When the client is identified as * "legacy 11b" ieee80211_send_proberesp is passed this token. */ #define IEEE80211_SEND_LEGACY_11B 0x1 /* legacy 11b client */ #define IEEE80211_SEND_LEGACY_11 0x2 /* other legacy client */ #define IEEE80211_SEND_LEGACY 0x3 /* any legacy client */ struct mbuf *ieee80211_alloc_proberesp(struct ieee80211_node *, int); int ieee80211_send_proberesp(struct ieee80211vap *, const uint8_t da[IEEE80211_ADDR_LEN], int); struct mbuf *ieee80211_alloc_rts(struct ieee80211com *ic, const uint8_t [IEEE80211_ADDR_LEN], const uint8_t [IEEE80211_ADDR_LEN], uint16_t); struct mbuf *ieee80211_alloc_cts(struct ieee80211com *, const uint8_t [IEEE80211_ADDR_LEN], uint16_t); uint8_t *ieee80211_add_rates(uint8_t *, const struct ieee80211_rateset *); uint8_t *ieee80211_add_xrates(uint8_t *, const struct ieee80211_rateset *); uint8_t *ieee80211_add_ssid(uint8_t *, const uint8_t *, u_int); uint8_t *ieee80211_add_wpa(uint8_t *, const struct ieee80211vap *); uint8_t *ieee80211_add_rsn(uint8_t *, const struct ieee80211vap *); uint8_t *ieee80211_add_qos(uint8_t *, const struct ieee80211_node *); uint16_t ieee80211_getcapinfo(struct ieee80211vap *, struct ieee80211_channel *); struct ieee80211_wme_state; uint8_t * ieee80211_add_wme_info(uint8_t *frm, struct ieee80211_wme_state *wme); void ieee80211_reset_erp(struct ieee80211com *); void ieee80211_set_shortslottime(struct ieee80211com *, int onoff); int ieee80211_iserp_rateset(const struct ieee80211_rateset *); void ieee80211_setbasicrates(struct ieee80211_rateset *, enum ieee80211_phymode); void ieee80211_addbasicrates(struct ieee80211_rateset *, enum ieee80211_phymode); /* * Return the size of the 802.11 header for a management or data frame. */ static __inline int ieee80211_hdrsize(const void *data) { const struct ieee80211_frame *wh = data; int size = sizeof(struct ieee80211_frame); /* NB: we don't handle control frames */ KASSERT((wh->i_fc[0]&IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_CTL, ("%s: control frame", __func__)); if (IEEE80211_IS_DSTODS(wh)) size += IEEE80211_ADDR_LEN; if (IEEE80211_QOS_HAS_SEQ(wh)) size += sizeof(uint16_t); return size; } /* * Like ieee80211_hdrsize, but handles any type of frame. */ static __inline int ieee80211_anyhdrsize(const void *data) { const struct ieee80211_frame *wh = data; if ((wh->i_fc[0]&IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) { switch (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) { case IEEE80211_FC0_SUBTYPE_CTS: case IEEE80211_FC0_SUBTYPE_ACK: return sizeof(struct ieee80211_frame_ack); case IEEE80211_FC0_SUBTYPE_BAR: return sizeof(struct ieee80211_frame_bar); } return sizeof(struct ieee80211_frame_min); } else return ieee80211_hdrsize(data); } /* * Template for an in-kernel authenticator. Authenticators * register with the protocol code and are typically loaded * as separate modules as needed. One special authenticator * is xauth; it intercepts requests so that protocols like * WPA can be handled in user space. */ struct ieee80211_authenticator { const char *ia_name; /* printable name */ int (*ia_attach)(struct ieee80211vap *); void (*ia_detach)(struct ieee80211vap *); void (*ia_node_join)(struct ieee80211_node *); void (*ia_node_leave)(struct ieee80211_node *); }; void ieee80211_authenticator_register(int type, const struct ieee80211_authenticator *); void ieee80211_authenticator_unregister(int type); const struct ieee80211_authenticator *ieee80211_authenticator_get(int auth); struct ieee80211req; /* * Template for an MAC ACL policy module. Such modules * register with the protocol code and are passed the sender's * address of each received auth frame for validation. */ struct ieee80211_aclator { const char *iac_name; /* printable name */ int (*iac_attach)(struct ieee80211vap *); void (*iac_detach)(struct ieee80211vap *); int (*iac_check)(struct ieee80211vap *, const struct ieee80211_frame *wh); int (*iac_add)(struct ieee80211vap *, const uint8_t mac[IEEE80211_ADDR_LEN]); int (*iac_remove)(struct ieee80211vap *, const uint8_t mac[IEEE80211_ADDR_LEN]); int (*iac_flush)(struct ieee80211vap *); int (*iac_setpolicy)(struct ieee80211vap *, int); int (*iac_getpolicy)(struct ieee80211vap *); int (*iac_setioctl)(struct ieee80211vap *, struct ieee80211req *); int (*iac_getioctl)(struct ieee80211vap *, struct ieee80211req *); }; void ieee80211_aclator_register(const struct ieee80211_aclator *); void ieee80211_aclator_unregister(const struct ieee80211_aclator *); const struct ieee80211_aclator *ieee80211_aclator_get(const char *name); /* flags for ieee80211_fix_rate() */ #define IEEE80211_F_DOSORT 0x00000001 /* sort rate list */ #define IEEE80211_F_DOFRATE 0x00000002 /* use fixed legacy rate */ #define IEEE80211_F_DONEGO 0x00000004 /* calc negotiated rate */ #define IEEE80211_F_DODEL 0x00000008 /* delete ignore rate */ #define IEEE80211_F_DOBRS 0x00000010 /* check basic rate set */ #define IEEE80211_F_JOIN 0x00000020 /* sta joining our bss */ #define IEEE80211_F_DOFMCS 0x00000040 /* use fixed HT rate */ int ieee80211_fix_rate(struct ieee80211_node *, struct ieee80211_rateset *, int); /* * WME/WMM support. */ struct wmeParams { uint8_t wmep_acm; uint8_t wmep_aifsn; uint8_t wmep_logcwmin; /* log2(cwmin) */ uint8_t wmep_logcwmax; /* log2(cwmax) */ uint8_t wmep_txopLimit; uint8_t wmep_noackPolicy; /* 0 (ack), 1 (no ack) */ }; #define IEEE80211_TXOP_TO_US(_txop) ((_txop)<<5) #define IEEE80211_US_TO_TXOP(_us) ((_us)>>5) struct chanAccParams { uint8_t cap_info; /* version of the current set */ struct wmeParams cap_wmeParams[WME_NUM_AC]; }; struct ieee80211_wme_state { u_int wme_flags; #define WME_F_AGGRMODE 0x00000001 /* STATUS: WME agressive mode */ u_int wme_hipri_traffic; /* VI/VO frames in beacon interval */ u_int wme_hipri_switch_thresh;/* agressive mode switch thresh */ u_int wme_hipri_switch_hysteresis;/* agressive mode switch hysteresis */ struct wmeParams wme_params[4]; /* from assoc resp for each AC*/ struct chanAccParams wme_wmeChanParams; /* WME params applied to self */ struct chanAccParams wme_wmeBssChanParams;/* WME params bcast to stations */ struct chanAccParams wme_chanParams; /* params applied to self */ struct chanAccParams wme_bssChanParams; /* params bcast to stations */ int (*wme_update)(struct ieee80211com *); }; void ieee80211_wme_initparams(struct ieee80211vap *); void ieee80211_wme_updateparams(struct ieee80211vap *); void ieee80211_wme_updateparams_locked(struct ieee80211vap *); /* * Return the WME TID from a QoS frame. If no TID * is present return the index for the "non-QoS" entry. */ static __inline uint8_t ieee80211_gettid(const struct ieee80211_frame *wh) { uint8_t tid; if (IEEE80211_QOS_HAS_SEQ(wh)) { if (IEEE80211_IS_DSTODS(wh)) tid = ((const struct ieee80211_qosframe_addr4 *)wh)-> i_qos[0]; else tid = ((const struct ieee80211_qosframe *)wh)->i_qos[0]; tid &= IEEE80211_QOS_TID; } else tid = IEEE80211_NONQOS_TID; return tid; } void ieee80211_waitfor_parent(struct ieee80211com *); void ieee80211_start_locked(struct ieee80211vap *); void ieee80211_init(void *); void ieee80211_start_all(struct ieee80211com *); void ieee80211_stop_locked(struct ieee80211vap *); void ieee80211_stop(struct ieee80211vap *); void ieee80211_stop_all(struct ieee80211com *); void ieee80211_suspend_all(struct ieee80211com *); void ieee80211_resume_all(struct ieee80211com *); void ieee80211_restart_all(struct ieee80211com *); void ieee80211_dturbo_switch(struct ieee80211vap *, int newflags); void ieee80211_swbmiss(void *arg); void ieee80211_beacon_miss(struct ieee80211com *); int ieee80211_new_state(struct ieee80211vap *, enum ieee80211_state, int); int ieee80211_new_state_locked(struct ieee80211vap *, enum ieee80211_state, int); void ieee80211_print_essid(const uint8_t *, int); void ieee80211_dump_pkt(struct ieee80211com *, const uint8_t *, int, int, int); extern const char *ieee80211_opmode_name[]; extern const char *ieee80211_state_name[IEEE80211_S_MAX]; extern const char *ieee80211_wme_acnames[]; /* * Beacon frames constructed by ieee80211_beacon_alloc * have the following structure filled in so drivers * can update the frame later w/ minimal overhead. */ struct ieee80211_beacon_offsets { uint8_t bo_flags[4]; /* update/state flags */ uint16_t *bo_caps; /* capabilities */ uint8_t *bo_cfp; /* start of CFParms element */ uint8_t *bo_tim; /* start of atim/dtim */ uint8_t *bo_wme; /* start of WME parameters */ uint8_t *bo_tdma; /* start of TDMA parameters */ uint8_t *bo_tim_trailer;/* start of fixed-size trailer */ uint16_t bo_tim_len; /* atim/dtim length in bytes */ uint16_t bo_tim_trailer_len;/* tim trailer length in bytes */ uint8_t *bo_erp; /* start of ERP element */ uint8_t *bo_htinfo; /* start of HT info element */ uint8_t *bo_ath; /* start of ATH parameters */ uint8_t *bo_appie; /* start of AppIE element */ uint16_t bo_appie_len; /* AppIE length in bytes */ uint16_t bo_csa_trailer_len; uint8_t *bo_csa; /* start of CSA element */ uint8_t *bo_quiet; /* start of Quiet element */ uint8_t *bo_meshconf; /* start of MESHCONF element */ uint8_t *bo_spare[3]; }; struct mbuf *ieee80211_beacon_alloc(struct ieee80211_node *); /* * Beacon frame updates are signaled through calls to iv_update_beacon * with one of the IEEE80211_BEACON_* tokens defined below. For devices * that construct beacon frames on the host this can trigger a rebuild * or defer the processing. For devices that offload beacon frame * handling this callback can be used to signal a rebuild. The bo_flags * array in the ieee80211_beacon_offsets structure is intended to record * deferred processing requirements; ieee80211_beacon_update uses the * state to optimize work. Since this structure is owned by the driver * and not visible to the 802.11 layer drivers must supply an iv_update_beacon * callback that marks the flag bits and schedules (as necessary) an update. */ enum { IEEE80211_BEACON_CAPS = 0, /* capabilities */ IEEE80211_BEACON_TIM = 1, /* DTIM/ATIM */ IEEE80211_BEACON_WME = 2, IEEE80211_BEACON_ERP = 3, /* Extended Rate Phy */ IEEE80211_BEACON_HTINFO = 4, /* HT Information */ IEEE80211_BEACON_APPIE = 5, /* Application IE's */ IEEE80211_BEACON_CFP = 6, /* CFParms */ IEEE80211_BEACON_CSA = 7, /* Channel Switch Announcement */ IEEE80211_BEACON_TDMA = 9, /* TDMA Info */ IEEE80211_BEACON_ATH = 10, /* ATH parameters */ IEEE80211_BEACON_MESHCONF = 11, /* Mesh Configuration */ }; int ieee80211_beacon_update(struct ieee80211_node *, struct mbuf *, int mcast); void ieee80211_csa_startswitch(struct ieee80211com *, struct ieee80211_channel *, int mode, int count); void ieee80211_csa_completeswitch(struct ieee80211com *); void ieee80211_csa_cancelswitch(struct ieee80211com *); void ieee80211_cac_completeswitch(struct ieee80211vap *); /* * Notification methods called from the 802.11 state machine. * Note that while these are defined here, their implementation * is OS-specific. */ void ieee80211_notify_node_join(struct ieee80211_node *, int newassoc); void ieee80211_notify_node_leave(struct ieee80211_node *); void ieee80211_notify_scan_done(struct ieee80211vap *); void ieee80211_notify_wds_discover(struct ieee80211_node *); void ieee80211_notify_csa(struct ieee80211com *, const struct ieee80211_channel *, int mode, int count); void ieee80211_notify_radar(struct ieee80211com *, const struct ieee80211_channel *); enum ieee80211_notify_cac_event { IEEE80211_NOTIFY_CAC_START = 0, /* CAC timer started */ IEEE80211_NOTIFY_CAC_STOP = 1, /* CAC intentionally stopped */ IEEE80211_NOTIFY_CAC_RADAR = 2, /* CAC stopped due to radar detectio */ IEEE80211_NOTIFY_CAC_EXPIRE = 3, /* CAC expired w/o radar */ }; void ieee80211_notify_cac(struct ieee80211com *, const struct ieee80211_channel *, enum ieee80211_notify_cac_event); void ieee80211_notify_node_deauth(struct ieee80211_node *); void ieee80211_notify_node_auth(struct ieee80211_node *); void ieee80211_notify_country(struct ieee80211vap *, const uint8_t [], const uint8_t cc[2]); void ieee80211_notify_radio(struct ieee80211com *, int); #endif /* _NET80211_IEEE80211_PROTO_H_ */ Index: head/sys/net80211/ieee80211_scan.c =================================================================== --- head/sys/net80211/ieee80211_scan.c (revision 298375) +++ head/sys/net80211/ieee80211_scan.c (revision 298376) @@ -1,666 +1,665 @@ /*- * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); /* * IEEE 802.11 scanning support. */ #include "opt_wlan.h" #include #include #include #include #include #include #include #include #include #include #include #include /* XXX until it's implemented as attach ops */ #include #include /* * Roaming-related defaults. RSSI thresholds are as returned by the * driver (.5dBm). Transmit rate thresholds are IEEE rate codes (i.e * .5M units) or MCS. */ /* rssi thresholds */ #define ROAM_RSSI_11A_DEFAULT 14 /* 11a bss */ #define ROAM_RSSI_11B_DEFAULT 14 /* 11b bss */ #define ROAM_RSSI_11BONLY_DEFAULT 14 /* 11b-only bss */ /* transmit rate thresholds */ #define ROAM_RATE_11A_DEFAULT 2*12 /* 11a bss */ #define ROAM_RATE_11B_DEFAULT 2*5 /* 11b bss */ #define ROAM_RATE_11BONLY_DEFAULT 2*1 /* 11b-only bss */ #define ROAM_RATE_HALF_DEFAULT 2*6 /* half-width 11a/g bss */ #define ROAM_RATE_QUARTER_DEFAULT 2*3 /* quarter-width 11a/g bss */ #define ROAM_MCS_11N_DEFAULT (1 | IEEE80211_RATE_MCS) /* 11n bss */ void ieee80211_scan_attach(struct ieee80211com *ic) { /* * If there's no scan method pointer, attach the * swscan set as a default. */ if (ic->ic_scan_methods == NULL) ieee80211_swscan_attach(ic); else ic->ic_scan_methods->sc_attach(ic); } void ieee80211_scan_detach(struct ieee80211com *ic) { /* * Ideally we'd do the ss_ops detach call here; * but then sc_detach() would need to be split in two. * * I'll do that later. */ ic->ic_scan_methods->sc_detach(ic); } static const struct ieee80211_roamparam defroam[IEEE80211_MODE_MAX] = { [IEEE80211_MODE_11A] = { .rssi = ROAM_RSSI_11A_DEFAULT, .rate = ROAM_RATE_11A_DEFAULT }, [IEEE80211_MODE_11G] = { .rssi = ROAM_RSSI_11B_DEFAULT, .rate = ROAM_RATE_11B_DEFAULT }, [IEEE80211_MODE_11B] = { .rssi = ROAM_RSSI_11BONLY_DEFAULT, .rate = ROAM_RATE_11BONLY_DEFAULT }, [IEEE80211_MODE_TURBO_A]= { .rssi = ROAM_RSSI_11A_DEFAULT, .rate = ROAM_RATE_11A_DEFAULT }, [IEEE80211_MODE_TURBO_G]= { .rssi = ROAM_RSSI_11A_DEFAULT, .rate = ROAM_RATE_11A_DEFAULT }, [IEEE80211_MODE_STURBO_A]={ .rssi = ROAM_RSSI_11A_DEFAULT, .rate = ROAM_RATE_11A_DEFAULT }, [IEEE80211_MODE_HALF] = { .rssi = ROAM_RSSI_11A_DEFAULT, .rate = ROAM_RATE_HALF_DEFAULT }, [IEEE80211_MODE_QUARTER]= { .rssi = ROAM_RSSI_11A_DEFAULT, .rate = ROAM_RATE_QUARTER_DEFAULT }, [IEEE80211_MODE_11NA] = { .rssi = ROAM_RSSI_11A_DEFAULT, .rate = ROAM_MCS_11N_DEFAULT }, [IEEE80211_MODE_11NG] = { .rssi = ROAM_RSSI_11B_DEFAULT, .rate = ROAM_MCS_11N_DEFAULT }, }; void ieee80211_scan_vattach(struct ieee80211vap *vap) { struct ieee80211com *ic = vap->iv_ic; vap->iv_bgscanidle = (IEEE80211_BGSCAN_IDLE_DEFAULT*1000)/hz; vap->iv_bgscanintvl = IEEE80211_BGSCAN_INTVAL_DEFAULT*hz; vap->iv_scanvalid = IEEE80211_SCAN_VALID_DEFAULT*hz; vap->iv_roaming = IEEE80211_ROAMING_AUTO; memcpy(vap->iv_roamparms, defroam, sizeof(defroam)); ic->ic_scan_methods->sc_vattach(vap); } void ieee80211_scan_vdetach(struct ieee80211vap *vap) { struct ieee80211com *ic = vap->iv_ic; struct ieee80211_scan_state *ss; IEEE80211_LOCK(ic); ss = ic->ic_scan; ic->ic_scan_methods->sc_vdetach(vap); if (ss != NULL && ss->ss_vap == vap) { if (ss->ss_ops != NULL) { ss->ss_ops->scan_detach(ss); ss->ss_ops = NULL; } ss->ss_vap = NULL; } IEEE80211_UNLOCK(ic); } /* * Simple-minded scanner module support. */ static const char *scan_modnames[IEEE80211_OPMODE_MAX] = { "wlan_scan_sta", /* IEEE80211_M_IBSS */ "wlan_scan_sta", /* IEEE80211_M_STA */ "wlan_scan_wds", /* IEEE80211_M_WDS */ "wlan_scan_sta", /* IEEE80211_M_AHDEMO */ "wlan_scan_ap", /* IEEE80211_M_HOSTAP */ "wlan_scan_monitor", /* IEEE80211_M_MONITOR */ "wlan_scan_sta", /* IEEE80211_M_MBSS */ }; static const struct ieee80211_scanner *scanners[IEEE80211_OPMODE_MAX]; const struct ieee80211_scanner * ieee80211_scanner_get(enum ieee80211_opmode mode) { if (mode >= IEEE80211_OPMODE_MAX) return NULL; if (scanners[mode] == NULL) ieee80211_load_module(scan_modnames[mode]); return scanners[mode]; } void ieee80211_scanner_register(enum ieee80211_opmode mode, const struct ieee80211_scanner *scan) { if (mode >= IEEE80211_OPMODE_MAX) return; scanners[mode] = scan; } void ieee80211_scanner_unregister(enum ieee80211_opmode mode, const struct ieee80211_scanner *scan) { if (mode >= IEEE80211_OPMODE_MAX) return; if (scanners[mode] == scan) scanners[mode] = NULL; } void ieee80211_scanner_unregister_all(const struct ieee80211_scanner *scan) { int m; for (m = 0; m < IEEE80211_OPMODE_MAX; m++) if (scanners[m] == scan) scanners[m] = NULL; } /* * Update common scanner state to reflect the current * operating mode. This is called when the state machine * is transitioned to RUN state w/o scanning--e.g. when * operating in monitor mode. The purpose of this is to * ensure later callbacks find ss_ops set to properly * reflect current operating mode. */ void ieee80211_scan_update_locked(struct ieee80211vap *vap, const struct ieee80211_scanner *scan) { struct ieee80211com *ic = vap->iv_ic; struct ieee80211_scan_state *ss = ic->ic_scan; IEEE80211_LOCK_ASSERT(ic); #ifdef IEEE80211_DEBUG if (ss->ss_vap != vap || ss->ss_ops != scan) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s: current scanner is <%s:%s>, switch to <%s:%s>\n", __func__, ss->ss_vap != NULL ? ss->ss_vap->iv_ifp->if_xname : "none", ss->ss_vap != NULL ? ieee80211_opmode_name[ss->ss_vap->iv_opmode] : "none", vap->iv_ifp->if_xname, ieee80211_opmode_name[vap->iv_opmode]); } #endif ss->ss_vap = vap; if (ss->ss_ops != scan) { /* * Switch scanners; detach old, attach new. Special * case where a single scan module implements multiple * policies by using different scan ops but a common * core. We assume if the old and new attach methods * are identical then it's ok to just change ss_ops * and not flush the internal state of the module. */ if (scan == NULL || ss->ss_ops == NULL || ss->ss_ops->scan_attach != scan->scan_attach) { if (ss->ss_ops != NULL) ss->ss_ops->scan_detach(ss); if (scan != NULL && !scan->scan_attach(ss)) { /* XXX attach failure */ /* XXX stat+msg */ scan = NULL; } } ss->ss_ops = scan; } } void ieee80211_scan_dump_channels(const struct ieee80211_scan_state *ss) { struct ieee80211com *ic = ss->ss_ic; const char *sep; int i; sep = ""; for (i = ss->ss_next; i < ss->ss_last; i++) { const struct ieee80211_channel *c = ss->ss_chans[i]; printf("%s%u%c", sep, ieee80211_chan2ieee(ic, c), ieee80211_channel_type_char(c)); sep = ", "; } } #ifdef IEEE80211_DEBUG void ieee80211_scan_dump(struct ieee80211_scan_state *ss) { struct ieee80211vap *vap = ss->ss_vap; if_printf(vap->iv_ifp, "scan set "); ieee80211_scan_dump_channels(ss); printf(" dwell min %lums max %lums\n", ticks_to_msecs(ss->ss_mindwell), ticks_to_msecs(ss->ss_maxdwell)); } #endif /* IEEE80211_DEBUG */ void ieee80211_scan_copy_ssid(struct ieee80211vap *vap, struct ieee80211_scan_state *ss, int nssid, const struct ieee80211_scan_ssid ssids[]) { if (nssid > IEEE80211_SCAN_MAX_SSID) { /* XXX printf */ IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s: too many ssid %d, ignoring all of them\n", __func__, nssid); return; } memcpy(ss->ss_ssid, ssids, nssid * sizeof(ssids[0])); ss->ss_nssid = nssid; } /* * Start a scan unless one is already going. */ int ieee80211_start_scan(struct ieee80211vap *vap, int flags, u_int duration, u_int mindwell, u_int maxdwell, u_int nssid, const struct ieee80211_scan_ssid ssids[]) { const struct ieee80211_scanner *scan; struct ieee80211com *ic = vap->iv_ic; scan = ieee80211_scanner_get(vap->iv_opmode); if (scan == NULL) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s: no scanner support for %s mode\n", __func__, ieee80211_opmode_name[vap->iv_opmode]); /* XXX stat */ return 0; } return ic->ic_scan_methods->sc_start_scan(scan, vap, flags, duration, mindwell, maxdwell, nssid, ssids); } /* * Check the scan cache for an ap/channel to use; if that * fails then kick off a new scan. */ int ieee80211_check_scan(struct ieee80211vap *vap, int flags, u_int duration, u_int mindwell, u_int maxdwell, u_int nssid, const struct ieee80211_scan_ssid ssids[]) { struct ieee80211com *ic = vap->iv_ic; struct ieee80211_scan_state *ss = ic->ic_scan; const struct ieee80211_scanner *scan; int result; scan = ieee80211_scanner_get(vap->iv_opmode); if (scan == NULL) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s: no scanner support for %s mode\n", __func__, vap->iv_opmode); /* XXX stat */ return 0; } /* * Check if there's a list of scan candidates already. * XXX want more than the ap we're currently associated with */ IEEE80211_LOCK(ic); IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s: %s scan, %s%s%s%s%s\n" , __func__ , flags & IEEE80211_SCAN_ACTIVE ? "active" : "passive" , flags & IEEE80211_SCAN_FLUSH ? "flush" : "append" , flags & IEEE80211_SCAN_NOPICK ? ", nopick" : "" , flags & IEEE80211_SCAN_NOJOIN ? ", nojoin" : "" , flags & IEEE80211_SCAN_PICK1ST ? ", pick1st" : "" , flags & IEEE80211_SCAN_ONCE ? ", once" : "" ); if (ss->ss_ops != scan) { /* XXX re-use cache contents? e.g. adhoc<->sta */ flags |= IEEE80211_SCAN_FLUSH; } /* * XXX TODO: separate things out a bit better. */ ieee80211_scan_update_locked(vap, scan); result = ic->ic_scan_methods->sc_check_scan(scan, vap, flags, duration, mindwell, maxdwell, nssid, ssids); IEEE80211_UNLOCK(ic); return (result); } /* * Check the scan cache for an ap/channel to use; if that fails * then kick off a scan using the current settings. */ int ieee80211_check_scan_current(struct ieee80211vap *vap) { return ieee80211_check_scan(vap, IEEE80211_SCAN_ACTIVE, IEEE80211_SCAN_FOREVER, 0, 0, vap->iv_des_nssid, vap->iv_des_ssid); } /* * Restart a previous scan. If the previous scan completed * then we start again using the existing channel list. */ int ieee80211_bg_scan(struct ieee80211vap *vap, int flags) { struct ieee80211com *ic = vap->iv_ic; const struct ieee80211_scanner *scan; // IEEE80211_UNLOCK_ASSERT(sc); scan = ieee80211_scanner_get(vap->iv_opmode); if (scan == NULL) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s: no scanner support for %s mode\n", __func__, vap->iv_opmode); /* XXX stat */ return 0; } /* * XXX TODO: pull apart the bgscan logic into whatever * belongs here and whatever belongs in the software * scanner. */ return (ic->ic_scan_methods->sc_bg_scan(scan, vap, flags)); } /* * Cancel any scan currently going on for the specified vap. */ void ieee80211_cancel_scan(struct ieee80211vap *vap) { struct ieee80211com *ic = vap->iv_ic; ic->ic_scan_methods->sc_cancel_scan(vap); } /* * Cancel any scan currently going on. */ void ieee80211_cancel_anyscan(struct ieee80211vap *vap) { struct ieee80211com *ic = vap->iv_ic; ic->ic_scan_methods->sc_cancel_anyscan(vap); } /* * Public access to scan_next for drivers that manage * scanning themselves (e.g. for firmware-based devices). */ void ieee80211_scan_next(struct ieee80211vap *vap) { struct ieee80211com *ic = vap->iv_ic; ic->ic_scan_methods->sc_scan_next(vap); } /* * Public access to scan_next for drivers that are not able to scan single * channels (e.g. for firmware-based devices). */ void ieee80211_scan_done(struct ieee80211vap *vap) { struct ieee80211com *ic = vap->iv_ic; struct ieee80211_scan_state *ss; IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s: called\n", __func__); IEEE80211_LOCK(ic); ss = ic->ic_scan; ss->ss_next = ss->ss_last; /* all channels are complete */ ic->ic_scan_methods->sc_scan_done(vap); IEEE80211_UNLOCK(ic); } /* * Probe the curent channel, if allowed, while scanning. * If the channel is not marked passive-only then send * a probe request immediately. Otherwise mark state and * listen for beacons on the channel; if we receive something * then we'll transmit a probe request. */ void ieee80211_probe_curchan(struct ieee80211vap *vap, int force) { struct ieee80211com *ic = vap->iv_ic; if ((ic->ic_curchan->ic_flags & IEEE80211_CHAN_PASSIVE) && !force) { ic->ic_flags_ext |= IEEE80211_FEXT_PROBECHAN; return; } ic->ic_scan_methods->sc_scan_probe_curchan(vap, force); } #ifdef IEEE80211_DEBUG static void dump_country(const uint8_t *ie) { const struct ieee80211_country_ie *cie = (const struct ieee80211_country_ie *) ie; int i, nbands, schan, nchan; if (cie->len < 3) { printf(" ", cie->len); return; } printf(" country [%c%c%c", cie->cc[0], cie->cc[1], cie->cc[2]); nbands = (cie->len - 3) / sizeof(cie->band[0]); for (i = 0; i < nbands; i++) { schan = cie->band[i].schan; nchan = cie->band[i].nchan; if (nchan != 1) printf(" %u-%u,%u", schan, schan + nchan-1, cie->band[i].maxtxpwr); else printf(" %u,%u", schan, cie->band[i].maxtxpwr); } printf("]"); } void ieee80211_scan_dump_probe_beacon(uint8_t subtype, int isnew, const uint8_t mac[IEEE80211_ADDR_LEN], const struct ieee80211_scanparams *sp, int rssi) { printf("[%s] %s%s on chan %u (bss chan %u) ", ether_sprintf(mac), isnew ? "new " : "", - ieee80211_mgt_subtype_name[subtype >> IEEE80211_FC0_SUBTYPE_SHIFT], - sp->chan, sp->bchan); + ieee80211_mgt_subtype_name(subtype), sp->chan, sp->bchan); ieee80211_print_essid(sp->ssid + 2, sp->ssid[1]); printf(" rssi %d\n", rssi); if (isnew) { printf("[%s] caps 0x%x bintval %u erp 0x%x", ether_sprintf(mac), sp->capinfo, sp->bintval, sp->erp); if (sp->country != NULL) dump_country(sp->country); printf("\n"); } } #endif /* IEEE80211_DEBUG */ /* * Process a beacon or probe response frame. */ void ieee80211_add_scan(struct ieee80211vap *vap, struct ieee80211_channel *curchan, const struct ieee80211_scanparams *sp, const struct ieee80211_frame *wh, int subtype, int rssi, int noise) { struct ieee80211com *ic = vap->iv_ic; return (ic->ic_scan_methods->sc_add_scan(vap, curchan, sp, wh, subtype, rssi, noise)); } /* * Timeout/age scan cache entries; called from sta timeout * timer (XXX should be self-contained). */ void ieee80211_scan_timeout(struct ieee80211com *ic) { struct ieee80211_scan_state *ss = ic->ic_scan; if (ss->ss_ops != NULL) ss->ss_ops->scan_age(ss); } /* * Mark a scan cache entry after a successful associate. */ void ieee80211_scan_assoc_success(struct ieee80211vap *vap, const uint8_t mac[]) { struct ieee80211_scan_state *ss = vap->iv_ic->ic_scan; if (ss->ss_ops != NULL) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_SCAN, mac, "%s", __func__); ss->ss_ops->scan_assoc_success(ss, mac); } } /* * Demerit a scan cache entry after failing to associate. */ void ieee80211_scan_assoc_fail(struct ieee80211vap *vap, const uint8_t mac[], int reason) { struct ieee80211_scan_state *ss = vap->iv_ic->ic_scan; if (ss->ss_ops != NULL) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_SCAN, mac, "%s: reason %u", __func__, reason); ss->ss_ops->scan_assoc_fail(ss, mac, reason); } } /* * Iterate over the contents of the scan cache. */ void ieee80211_scan_iterate(struct ieee80211vap *vap, ieee80211_scan_iter_func *f, void *arg) { struct ieee80211_scan_state *ss = vap->iv_ic->ic_scan; if (ss->ss_ops != NULL) ss->ss_ops->scan_iterate(ss, f, arg); } /* * Flush the contents of the scan cache. */ void ieee80211_scan_flush(struct ieee80211vap *vap) { struct ieee80211_scan_state *ss = vap->iv_ic->ic_scan; if (ss->ss_ops != NULL && ss->ss_vap == vap) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s\n", __func__); ss->ss_ops->scan_flush(ss); } } /* * Check the scan cache for an ap/channel to use; if that * fails then kick off a new scan. */ struct ieee80211_channel * ieee80211_scan_pickchannel(struct ieee80211com *ic, int flags) { struct ieee80211_scan_state *ss = ic->ic_scan; IEEE80211_LOCK_ASSERT(ic); if (ss == NULL || ss->ss_ops == NULL || ss->ss_vap == NULL) { /* XXX printf? */ return NULL; } if (ss->ss_ops->scan_pickchan == NULL) { IEEE80211_DPRINTF(ss->ss_vap, IEEE80211_MSG_SCAN, "%s: scan module does not support picking a channel, " "opmode %s\n", __func__, ss->ss_vap->iv_opmode); return NULL; } return ss->ss_ops->scan_pickchan(ss, flags); } Index: head/sys/net80211/ieee80211_sta.c =================================================================== --- head/sys/net80211/ieee80211_sta.c (revision 298375) +++ head/sys/net80211/ieee80211_sta.c (revision 298376) @@ -1,1877 +1,1875 @@ /*- * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include #ifdef __FreeBSD__ __FBSDID("$FreeBSD$"); #endif /* * IEEE 802.11 Station mode support. */ #include "opt_inet.h" #include "opt_wlan.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef IEEE80211_SUPPORT_SUPERG #include #endif #include #include #define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2) static void sta_vattach(struct ieee80211vap *); static void sta_beacon_miss(struct ieee80211vap *); static int sta_newstate(struct ieee80211vap *, enum ieee80211_state, int); static int sta_input(struct ieee80211_node *, struct mbuf *, const struct ieee80211_rx_stats *, int, int); static void sta_recv_mgmt(struct ieee80211_node *, struct mbuf *, int subtype, const struct ieee80211_rx_stats *, int rssi, int nf); static void sta_recv_ctl(struct ieee80211_node *, struct mbuf *, int subtype); void ieee80211_sta_attach(struct ieee80211com *ic) { ic->ic_vattach[IEEE80211_M_STA] = sta_vattach; } void ieee80211_sta_detach(struct ieee80211com *ic) { } static void sta_vdetach(struct ieee80211vap *vap) { } static void sta_vattach(struct ieee80211vap *vap) { vap->iv_newstate = sta_newstate; vap->iv_input = sta_input; vap->iv_recv_mgmt = sta_recv_mgmt; vap->iv_recv_ctl = sta_recv_ctl; vap->iv_opdetach = sta_vdetach; vap->iv_bmiss = sta_beacon_miss; } /* * Handle a beacon miss event. The common code filters out * spurious events that can happen when scanning and/or before * reaching RUN state. */ static void sta_beacon_miss(struct ieee80211vap *vap) { struct ieee80211com *ic = vap->iv_ic; IEEE80211_LOCK_ASSERT(ic); KASSERT((ic->ic_flags & IEEE80211_F_SCAN) == 0, ("scanning")); KASSERT(vap->iv_state >= IEEE80211_S_RUN, ("wrong state %s", ieee80211_state_name[vap->iv_state])); IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, "beacon miss, mode %s state %s\n", ieee80211_opmode_name[vap->iv_opmode], ieee80211_state_name[vap->iv_state]); if (vap->iv_state == IEEE80211_S_CSA) { /* * A Channel Switch is pending; assume we missed the * beacon that would've completed the process and just * force the switch. If we made a mistake we'll not * find the AP on the new channel and fall back to a * normal scan. */ ieee80211_csa_completeswitch(ic); return; } if (++vap->iv_bmiss_count < vap->iv_bmiss_max) { /* * Send a directed probe req before falling back to a * scan; if we receive a response ic_bmiss_count will * be reset. Some cards mistakenly report beacon miss * so this avoids the expensive scan if the ap is * still there. */ ieee80211_send_probereq(vap->iv_bss, vap->iv_myaddr, vap->iv_bss->ni_bssid, vap->iv_bss->ni_bssid, vap->iv_bss->ni_essid, vap->iv_bss->ni_esslen); return; } callout_stop(&vap->iv_swbmiss); vap->iv_bmiss_count = 0; vap->iv_stats.is_beacon_miss++; if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { #ifdef IEEE80211_SUPPORT_SUPERG struct ieee80211com *ic = vap->iv_ic; /* * If we receive a beacon miss interrupt when using * dynamic turbo, attempt to switch modes before * reassociating. */ if (IEEE80211_ATH_CAP(vap, vap->iv_bss, IEEE80211_NODE_TURBOP)) ieee80211_dturbo_switch(vap, ic->ic_bsschan->ic_flags ^ IEEE80211_CHAN_TURBO); #endif /* * Try to reassociate before scanning for a new ap. */ ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); } else { /* * Somebody else is controlling state changes (e.g. * a user-mode app) don't do anything that would * confuse them; just drop into scan mode so they'll * notified of the state change and given control. */ ieee80211_new_state(vap, IEEE80211_S_SCAN, 0); } } /* * Handle deauth with reason. We retry only for * the cases where we might succeed. Otherwise * we downgrade the ap and scan. */ static void sta_authretry(struct ieee80211vap *vap, struct ieee80211_node *ni, int reason) { switch (reason) { case IEEE80211_STATUS_SUCCESS: /* NB: MLME assoc */ case IEEE80211_STATUS_TIMEOUT: case IEEE80211_REASON_ASSOC_EXPIRE: case IEEE80211_REASON_NOT_AUTHED: case IEEE80211_REASON_NOT_ASSOCED: case IEEE80211_REASON_ASSOC_LEAVE: case IEEE80211_REASON_ASSOC_NOT_AUTHED: IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, 1); break; default: ieee80211_scan_assoc_fail(vap, vap->iv_bss->ni_macaddr, reason); if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) ieee80211_check_scan_current(vap); break; } } static void sta_swbmiss_start(struct ieee80211vap *vap) { if (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS) { /* * Start s/w beacon miss timer for devices w/o * hardware support. We fudge a bit here since * we're doing this in software. */ vap->iv_swbmiss_period = IEEE80211_TU_TO_TICKS( 2 * vap->iv_bmissthreshold * vap->iv_bss->ni_intval); vap->iv_swbmiss_count = 0; callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, ieee80211_swbmiss, vap); } } /* * IEEE80211_M_STA vap state machine handler. * This routine handles the main states in the 802.11 protocol. */ static int sta_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) { struct ieee80211com *ic = vap->iv_ic; struct ieee80211_node *ni; enum ieee80211_state ostate; IEEE80211_LOCK_ASSERT(ic); ostate = vap->iv_state; IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", __func__, ieee80211_state_name[ostate], ieee80211_state_name[nstate], arg); vap->iv_state = nstate; /* state transition */ callout_stop(&vap->iv_mgtsend); /* XXX callout_drain */ if (ostate != IEEE80211_S_SCAN) ieee80211_cancel_scan(vap); /* background scan */ ni = vap->iv_bss; /* NB: no reference held */ if (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS) callout_stop(&vap->iv_swbmiss); switch (nstate) { case IEEE80211_S_INIT: switch (ostate) { case IEEE80211_S_SLEEP: /* XXX wakeup */ /* XXX driver hook to wakeup the hardware? */ case IEEE80211_S_RUN: IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DISASSOC, IEEE80211_REASON_ASSOC_LEAVE); ieee80211_sta_leave(ni); break; case IEEE80211_S_ASSOC: IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, IEEE80211_REASON_AUTH_LEAVE); break; case IEEE80211_S_SCAN: ieee80211_cancel_scan(vap); break; default: break; } if (ostate != IEEE80211_S_INIT) { /* NB: optimize INIT -> INIT case */ ieee80211_reset_bss(vap); } if (vap->iv_auth->ia_detach != NULL) vap->iv_auth->ia_detach(vap); break; case IEEE80211_S_SCAN: switch (ostate) { case IEEE80211_S_INIT: /* * Initiate a scan. We can come here as a result * of an IEEE80211_IOC_SCAN_REQ too in which case * the vap will be marked with IEEE80211_FEXT_SCANREQ * and the scan request parameters will be present * in iv_scanreq. Otherwise we do the default. */ if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { ieee80211_check_scan(vap, vap->iv_scanreq_flags, vap->iv_scanreq_duration, vap->iv_scanreq_mindwell, vap->iv_scanreq_maxdwell, vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; } else ieee80211_check_scan_current(vap); break; case IEEE80211_S_SCAN: case IEEE80211_S_AUTH: case IEEE80211_S_ASSOC: /* * These can happen either because of a timeout * on an assoc/auth response or because of a * change in state that requires a reset. For * the former we're called with a non-zero arg * that is the cause for the failure; pass this * to the scan code so it can update state. * Otherwise trigger a new scan unless we're in * manual roaming mode in which case an application * must issue an explicit scan request. */ if (arg != 0) ieee80211_scan_assoc_fail(vap, vap->iv_bss->ni_macaddr, arg); if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) ieee80211_check_scan_current(vap); break; case IEEE80211_S_SLEEP: /* beacon miss */ /* * XXX if in sleep we need to wakeup the hardware. */ /* FALLTHROUGH */ case IEEE80211_S_RUN: /* beacon miss */ /* * Beacon miss. Notify user space and if not * under control of a user application (roaming * manual) kick off a scan to re-connect. */ ieee80211_sta_leave(ni); if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) ieee80211_check_scan_current(vap); break; default: goto invalid; } break; case IEEE80211_S_AUTH: switch (ostate) { case IEEE80211_S_INIT: case IEEE80211_S_SCAN: IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, 1); break; case IEEE80211_S_AUTH: case IEEE80211_S_ASSOC: switch (arg & 0xff) { case IEEE80211_FC0_SUBTYPE_AUTH: /* ??? */ IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, 2); break; case IEEE80211_FC0_SUBTYPE_DEAUTH: sta_authretry(vap, ni, arg>>8); break; } break; case IEEE80211_S_SLEEP: case IEEE80211_S_RUN: switch (arg & 0xff) { case IEEE80211_FC0_SUBTYPE_AUTH: IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, 2); vap->iv_state = IEEE80211_S_RUN; /* stay RUN */ break; case IEEE80211_FC0_SUBTYPE_DEAUTH: ieee80211_sta_leave(ni); if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { /* try to reauth */ IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, 1); } break; } break; default: goto invalid; } break; case IEEE80211_S_ASSOC: switch (ostate) { case IEEE80211_S_AUTH: case IEEE80211_S_ASSOC: IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); break; case IEEE80211_S_SLEEP: /* cannot happen */ case IEEE80211_S_RUN: ieee80211_sta_leave(ni); if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { IEEE80211_SEND_MGMT(ni, arg ? IEEE80211_FC0_SUBTYPE_REASSOC_REQ : IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); } break; default: goto invalid; } break; case IEEE80211_S_RUN: if (vap->iv_flags & IEEE80211_F_WPA) { /* XXX validate prerequisites */ } switch (ostate) { case IEEE80211_S_RUN: case IEEE80211_S_CSA: break; case IEEE80211_S_AUTH: /* when join is done in fw */ case IEEE80211_S_ASSOC: #ifdef IEEE80211_DEBUG if (ieee80211_msg_debug(vap)) { ieee80211_note(vap, "%s with %s ssid ", (vap->iv_opmode == IEEE80211_M_STA ? "associated" : "synchronized"), ether_sprintf(ni->ni_bssid)); ieee80211_print_essid(vap->iv_bss->ni_essid, ni->ni_esslen); /* XXX MCS/HT */ printf(" channel %d start %uMb\n", ieee80211_chan2ieee(ic, ic->ic_curchan), IEEE80211_RATE2MBS(ni->ni_txrate)); } #endif ieee80211_scan_assoc_success(vap, ni->ni_macaddr); ieee80211_notify_node_join(ni, arg == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); break; case IEEE80211_S_SLEEP: /* Wake up from sleep */ vap->iv_sta_ps(vap, 0); break; default: goto invalid; } ieee80211_sync_curchan(ic); if (ostate != IEEE80211_S_RUN) sta_swbmiss_start(vap); /* * When 802.1x is not in use mark the port authorized * at this point so traffic can flow. */ if (ni->ni_authmode != IEEE80211_AUTH_8021X) ieee80211_node_authorize(ni); /* * Fake association when joining an existing bss. * * Don't do this if we're doing SLEEP->RUN. */ if (ic->ic_newassoc != NULL && ostate != IEEE80211_S_SLEEP) ic->ic_newassoc(vap->iv_bss, (ostate != IEEE80211_S_RUN)); break; case IEEE80211_S_CSA: if (ostate != IEEE80211_S_RUN) goto invalid; break; case IEEE80211_S_SLEEP: sta_swbmiss_start(vap); vap->iv_sta_ps(vap, 1); break; default: invalid: IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: unexpected state transition %s -> %s\n", __func__, ieee80211_state_name[ostate], ieee80211_state_name[nstate]); break; } return 0; } /* * Return non-zero if the frame is an echo of a multicast * frame sent by ourself. The dir is known to be DSTODS. */ static __inline int isdstods_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh) { #define QWH4(wh) ((const struct ieee80211_qosframe_addr4 *)wh) #define WH4(wh) ((const struct ieee80211_frame_addr4 *)wh) const uint8_t *sa; KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode")); if (!IEEE80211_IS_MULTICAST(wh->i_addr3)) return 0; sa = IEEE80211_QOS_HAS_SEQ(wh) ? QWH4(wh)->i_addr4 : WH4(wh)->i_addr4; return IEEE80211_ADDR_EQ(sa, vap->iv_myaddr); #undef WH4 #undef QWH4 } /* * Return non-zero if the frame is an echo of a multicast * frame sent by ourself. The dir is known to be FROMDS. */ static __inline int isfromds_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh) { KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode")); if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) return 0; return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); } /* * Decide if a received management frame should be * printed when debugging is enabled. This filters some * of the less interesting frames that come frequently * (e.g. beacons). */ static __inline int doprint(struct ieee80211vap *vap, int subtype) { switch (subtype) { case IEEE80211_FC0_SUBTYPE_BEACON: return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN); case IEEE80211_FC0_SUBTYPE_PROBE_REQ: return 0; } return 1; } /* * Process a received frame. The node associated with the sender * should be supplied. If nothing was found in the node table then * the caller is assumed to supply a reference to iv_bss instead. * The RSSI and a timestamp are also supplied. The RSSI data is used * during AP scanning to select a AP to associate with; it can have * any units so long as values have consistent units and higher values * mean ``better signal''. The receive timestamp is currently not used * by the 802.11 layer. */ static int sta_input(struct ieee80211_node *ni, struct mbuf *m, const struct ieee80211_rx_stats *rxs, int rssi, int nf) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; struct ifnet *ifp = vap->iv_ifp; struct ieee80211_frame *wh; struct ieee80211_key *key; struct ether_header *eh; int hdrspace, need_tap = 1; /* mbuf need to be tapped. */ uint8_t dir, type, subtype, qos; uint8_t *bssid; if (m->m_flags & M_AMPDU_MPDU) { /* * Fastpath for A-MPDU reorder q resubmission. Frames * w/ M_AMPDU_MPDU marked have already passed through * here but were received out of order and been held on * the reorder queue. When resubmitted they are marked * with the M_AMPDU_MPDU flag and we can bypass most of * the normal processing. */ wh = mtod(m, struct ieee80211_frame *); type = IEEE80211_FC0_TYPE_DATA; dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; subtype = IEEE80211_FC0_SUBTYPE_QOS; hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ goto resubmit_ampdu; } KASSERT(ni != NULL, ("null node")); ni->ni_inact = ni->ni_inact_reload; type = -1; /* undefined */ if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, "too short (1): len %u", m->m_pkthdr.len); vap->iv_stats.is_rx_tooshort++; goto out; } /* * Bit of a cheat here, we use a pointer for a 3-address * frame format but don't reference fields past outside * ieee80211_frame_min w/o first validating the data is * present. */ wh = mtod(m, struct ieee80211_frame *); if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != IEEE80211_FC0_VERSION_0) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x", wh->i_fc[0], wh->i_fc[1]); vap->iv_stats.is_rx_badversion++; goto err; } dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { bssid = wh->i_addr2; if (!IEEE80211_ADDR_EQ(bssid, ni->ni_bssid)) { /* not interested in */ IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, bssid, NULL, "%s", "not to bss"); vap->iv_stats.is_rx_wrongbss++; goto out; } /* * Some devices may be in a promiscuous mode * where they receive frames for multiple station * addresses. * * If we receive a data frame that isn't * destined to our VAP MAC, drop it. * * XXX TODO: This is only enforced when not scanning; * XXX it assumes a software-driven scan will put the NIC * XXX into a "no data frames" mode before setting this * XXX flag. Otherwise it may be possible that we'll still * XXX process data frames whilst scanning. */ if ((! IEEE80211_IS_MULTICAST(wh->i_addr1)) && (! IEEE80211_ADDR_EQ(wh->i_addr1, IF_LLADDR(ifp)))) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, bssid, NULL, "not to cur sta: lladdr=%6D, addr1=%6D", IF_LLADDR(ifp), ":", wh->i_addr1, ":"); vap->iv_stats.is_rx_wrongbss++; goto out; } IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); ni->ni_noise = nf; if ( IEEE80211_HAS_SEQ(type, subtype) && !IEEE80211_IS_MULTICAST(wh->i_addr1)) { uint8_t tid = ieee80211_gettid(wh); if (IEEE80211_QOS_HAS_SEQ(wh) && TID_TO_WME_AC(tid) >= WME_AC_VI) ic->ic_wme.wme_hipri_traffic++; if (! ieee80211_check_rxseq(ni, wh, bssid)) goto out; } } switch (type) { case IEEE80211_FC0_TYPE_DATA: hdrspace = ieee80211_hdrspace(ic, wh); if (m->m_len < hdrspace && (m = m_pullup(m, hdrspace)) == NULL) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, "data too short: expecting %u", hdrspace); vap->iv_stats.is_rx_tooshort++; goto out; /* XXX */ } /* * Handle A-MPDU re-ordering. If the frame is to be * processed directly then ieee80211_ampdu_reorder * will return 0; otherwise it has consumed the mbuf * and we should do nothing more with it. */ if ((m->m_flags & M_AMPDU) && (dir == IEEE80211_FC1_DIR_FROMDS || dir == IEEE80211_FC1_DIR_DSTODS) && ieee80211_ampdu_reorder(ni, m) != 0) { m = NULL; goto out; } resubmit_ampdu: if (dir == IEEE80211_FC1_DIR_FROMDS) { if ((ifp->if_flags & IFF_SIMPLEX) && isfromds_mcastecho(vap, wh)) { /* * In IEEE802.11 network, multicast * packets sent from "me" are broadcast * from the AP; silently discard for * SIMPLEX interface. */ IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "data", "%s", "multicast echo"); vap->iv_stats.is_rx_mcastecho++; goto out; } if ((vap->iv_flags & IEEE80211_F_DWDS) && IEEE80211_IS_MULTICAST(wh->i_addr1)) { /* * DWDS sta's must drop 3-address mcast frames * as they will be sent separately as a 4-addr * frame. Accepting the 3-addr frame will * confuse the bridge into thinking the sending * sta is located at the end of WDS link. */ IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "3-address data", "%s", "DWDS enabled"); vap->iv_stats.is_rx_mcastecho++; goto out; } } else if (dir == IEEE80211_FC1_DIR_DSTODS) { if ((vap->iv_flags & IEEE80211_F_DWDS) == 0) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "4-address data", "%s", "DWDS not enabled"); vap->iv_stats.is_rx_wrongdir++; goto out; } if ((ifp->if_flags & IFF_SIMPLEX) && isdstods_mcastecho(vap, wh)) { /* * In IEEE802.11 network, multicast * packets sent from "me" are broadcast * from the AP; silently discard for * SIMPLEX interface. */ IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "4-address data", "%s", "multicast echo"); vap->iv_stats.is_rx_mcastecho++; goto out; } } else { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "data", "incorrect dir 0x%x", dir); vap->iv_stats.is_rx_wrongdir++; goto out; } /* * Handle privacy requirements. Note that we * must not be preempted from here until after * we (potentially) call ieee80211_crypto_demic; * otherwise we may violate assumptions in the * crypto cipher modules used to do delayed update * of replay sequence numbers. */ if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { /* * Discard encrypted frames when privacy is off. */ IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "WEP", "%s", "PRIVACY off"); vap->iv_stats.is_rx_noprivacy++; IEEE80211_NODE_STAT(ni, rx_noprivacy); goto out; } key = ieee80211_crypto_decap(ni, m, hdrspace); if (key == NULL) { /* NB: stats+msgs handled in crypto_decap */ IEEE80211_NODE_STAT(ni, rx_wepfail); goto out; } wh = mtod(m, struct ieee80211_frame *); wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; } else { /* XXX M_WEP and IEEE80211_F_PRIVACY */ key = NULL; } /* * Save QoS bits for use below--before we strip the header. */ if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : ((struct ieee80211_qosframe *)wh)->i_qos[0]; } else qos = 0; /* * Next up, any fragmentation. */ if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { m = ieee80211_defrag(ni, m, hdrspace); if (m == NULL) { /* Fragment dropped or frame not complete yet */ goto out; } } wh = NULL; /* no longer valid, catch any uses */ /* * Next strip any MSDU crypto bits. */ if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, ni->ni_macaddr, "data", "%s", "demic error"); vap->iv_stats.is_rx_demicfail++; IEEE80211_NODE_STAT(ni, rx_demicfail); goto out; } /* copy to listener after decrypt */ if (ieee80211_radiotap_active_vap(vap)) ieee80211_radiotap_rx(vap, m); need_tap = 0; /* * Finally, strip the 802.11 header. */ m = ieee80211_decap(vap, m, hdrspace); if (m == NULL) { /* XXX mask bit to check for both */ /* don't count Null data frames as errors */ if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) goto out; IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, ni->ni_macaddr, "data", "%s", "decap error"); vap->iv_stats.is_rx_decap++; IEEE80211_NODE_STAT(ni, rx_decap); goto err; } eh = mtod(m, struct ether_header *); if (!ieee80211_node_is_authorized(ni)) { /* * Deny any non-PAE frames received prior to * authorization. For open/shared-key * authentication the port is mark authorized * after authentication completes. For 802.1x * the port is not marked authorized by the * authenticator until the handshake has completed. */ if (eh->ether_type != htons(ETHERTYPE_PAE)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, eh->ether_shost, "data", "unauthorized port: ether type 0x%x len %u", eh->ether_type, m->m_pkthdr.len); vap->iv_stats.is_rx_unauth++; IEEE80211_NODE_STAT(ni, rx_unauth); goto err; } } else { /* * When denying unencrypted frames, discard * any non-PAE frames received without encryption. */ if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && (key == NULL && (m->m_flags & M_WEP) == 0) && eh->ether_type != htons(ETHERTYPE_PAE)) { /* * Drop unencrypted frames. */ vap->iv_stats.is_rx_unencrypted++; IEEE80211_NODE_STAT(ni, rx_unencrypted); goto out; } } /* XXX require HT? */ if (qos & IEEE80211_QOS_AMSDU) { m = ieee80211_decap_amsdu(ni, m); if (m == NULL) return IEEE80211_FC0_TYPE_DATA; } else { #ifdef IEEE80211_SUPPORT_SUPERG m = ieee80211_decap_fastframe(vap, ni, m); if (m == NULL) return IEEE80211_FC0_TYPE_DATA; #endif } ieee80211_deliver_data(vap, ni, m); return IEEE80211_FC0_TYPE_DATA; case IEEE80211_FC0_TYPE_MGT: vap->iv_stats.is_rx_mgmt++; IEEE80211_NODE_STAT(ni, rx_mgmt); if (dir != IEEE80211_FC1_DIR_NODS) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "data", "incorrect dir 0x%x", dir); vap->iv_stats.is_rx_wrongdir++; goto err; } if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, "mgt", "too short: len %u", m->m_pkthdr.len); vap->iv_stats.is_rx_tooshort++; goto out; } #ifdef IEEE80211_DEBUG if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) || ieee80211_msg_dumppkts(vap)) { if_printf(ifp, "received %s from %s rssi %d\n", - ieee80211_mgt_subtype_name[subtype >> - IEEE80211_FC0_SUBTYPE_SHIFT], + ieee80211_mgt_subtype_name(subtype), ether_sprintf(wh->i_addr2), rssi); } #endif if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) { /* * Only shared key auth frames with a challenge * should be encrypted, discard all others. */ IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, - wh, ieee80211_mgt_subtype_name[subtype >> - IEEE80211_FC0_SUBTYPE_SHIFT], + wh, ieee80211_mgt_subtype_name(subtype), "%s", "WEP set but not permitted"); vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ goto out; } if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { /* * Discard encrypted frames when privacy is off. */ IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "mgt", "%s", "WEP set but PRIVACY off"); vap->iv_stats.is_rx_noprivacy++; goto out; } hdrspace = ieee80211_hdrspace(ic, wh); key = ieee80211_crypto_decap(ni, m, hdrspace); if (key == NULL) { /* NB: stats+msgs handled in crypto_decap */ goto out; } wh = mtod(m, struct ieee80211_frame *); wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; } vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); goto out; case IEEE80211_FC0_TYPE_CTL: vap->iv_stats.is_rx_ctl++; IEEE80211_NODE_STAT(ni, rx_ctrl); vap->iv_recv_ctl(ni, m, subtype); goto out; default: IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, wh, NULL, "bad frame type 0x%x", type); /* should not come here */ break; } err: if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); out: if (m != NULL) { if (need_tap && ieee80211_radiotap_active_vap(vap)) ieee80211_radiotap_rx(vap, m); m_freem(m); } return type; } static void sta_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh, int rssi, int nf, uint16_t seq, uint16_t status) { struct ieee80211vap *vap = ni->ni_vap; if (ni->ni_authmode == IEEE80211_AUTH_SHARED) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, ni->ni_macaddr, "open auth", "bad sta auth mode %u", ni->ni_authmode); vap->iv_stats.is_rx_bad_auth++; /* XXX */ return; } if (vap->iv_state != IEEE80211_S_AUTH || seq != IEEE80211_AUTH_OPEN_RESPONSE) { vap->iv_stats.is_rx_bad_auth++; return; } if (status != 0) { IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni, "open auth failed (reason %d)", status); vap->iv_stats.is_rx_auth_fail++; vap->iv_stats.is_rx_authfail_code = status; ieee80211_new_state(vap, IEEE80211_S_SCAN, IEEE80211_SCAN_FAIL_STATUS); } else ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); } static void sta_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh, uint8_t *frm, uint8_t *efrm, int rssi, int nf, uint16_t seq, uint16_t status) { struct ieee80211vap *vap = ni->ni_vap; uint8_t *challenge; int estatus; /* * NB: this can happen as we allow pre-shared key * authentication to be enabled w/o wep being turned * on so that configuration of these can be done * in any order. It may be better to enforce the * ordering in which case this check would just be * for sanity/consistency. */ if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, ni->ni_macaddr, "shared key auth", "%s", " PRIVACY is disabled"); estatus = IEEE80211_STATUS_ALG; goto bad; } /* * Pre-shared key authentication is evil; accept * it only if explicitly configured (it is supported * mainly for compatibility with clients like OS X). */ if (ni->ni_authmode != IEEE80211_AUTH_AUTO && ni->ni_authmode != IEEE80211_AUTH_SHARED) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, ni->ni_macaddr, "shared key auth", "bad sta auth mode %u", ni->ni_authmode); vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */ estatus = IEEE80211_STATUS_ALG; goto bad; } challenge = NULL; if (frm + 1 < efrm) { if ((frm[1] + 2) > (efrm - frm)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, ni->ni_macaddr, "shared key auth", "ie %d/%d too long", frm[0], (frm[1] + 2) - (efrm - frm)); vap->iv_stats.is_rx_bad_auth++; estatus = IEEE80211_STATUS_CHALLENGE; goto bad; } if (*frm == IEEE80211_ELEMID_CHALLENGE) challenge = frm; frm += frm[1] + 2; } switch (seq) { case IEEE80211_AUTH_SHARED_CHALLENGE: case IEEE80211_AUTH_SHARED_RESPONSE: if (challenge == NULL) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, ni->ni_macaddr, "shared key auth", "%s", "no challenge"); vap->iv_stats.is_rx_bad_auth++; estatus = IEEE80211_STATUS_CHALLENGE; goto bad; } if (challenge[1] != IEEE80211_CHALLENGE_LEN) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, ni->ni_macaddr, "shared key auth", "bad challenge len %d", challenge[1]); vap->iv_stats.is_rx_bad_auth++; estatus = IEEE80211_STATUS_CHALLENGE; goto bad; } default: break; } if (vap->iv_state != IEEE80211_S_AUTH) return; switch (seq) { case IEEE80211_AUTH_SHARED_PASS: if (ni->ni_challenge != NULL) { IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); ni->ni_challenge = NULL; } if (status != 0) { IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, wh, "shared key auth failed (reason %d)", status); vap->iv_stats.is_rx_auth_fail++; vap->iv_stats.is_rx_authfail_code = status; return; } ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); break; case IEEE80211_AUTH_SHARED_CHALLENGE: if (!ieee80211_alloc_challenge(ni)) return; /* XXX could optimize by passing recvd challenge */ memcpy(ni->ni_challenge, &challenge[2], challenge[1]); IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); break; default: IEEE80211_DISCARD(vap, IEEE80211_MSG_AUTH, wh, "shared key auth", "bad seq %d", seq); vap->iv_stats.is_rx_bad_auth++; return; } return; bad: /* * Kick the state machine. This short-circuits * using the mgt frame timeout to trigger the * state transition. */ if (vap->iv_state == IEEE80211_S_AUTH) ieee80211_new_state(vap, IEEE80211_S_SCAN, IEEE80211_SCAN_FAIL_STATUS); } int ieee80211_parse_wmeparams(struct ieee80211vap *vap, uint8_t *frm, const struct ieee80211_frame *wh) { #define MS(_v, _f) (((_v) & _f) >> _f##_S) struct ieee80211_wme_state *wme = &vap->iv_ic->ic_wme; u_int len = frm[1], qosinfo; int i; if (len < sizeof(struct ieee80211_wme_param)-2) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_WME, wh, "WME", "too short, len %u", len); return -1; } qosinfo = frm[__offsetof(struct ieee80211_wme_param, param_qosInfo)]; qosinfo &= WME_QOSINFO_COUNT; /* XXX do proper check for wraparound */ if (qosinfo == wme->wme_wmeChanParams.cap_info) return 0; frm += __offsetof(struct ieee80211_wme_param, params_acParams); for (i = 0; i < WME_NUM_AC; i++) { struct wmeParams *wmep = &wme->wme_wmeChanParams.cap_wmeParams[i]; /* NB: ACI not used */ wmep->wmep_acm = MS(frm[0], WME_PARAM_ACM); wmep->wmep_aifsn = MS(frm[0], WME_PARAM_AIFSN); wmep->wmep_logcwmin = MS(frm[1], WME_PARAM_LOGCWMIN); wmep->wmep_logcwmax = MS(frm[1], WME_PARAM_LOGCWMAX); wmep->wmep_txopLimit = le16dec(frm+2); frm += 4; } wme->wme_wmeChanParams.cap_info = qosinfo; return 1; #undef MS } /* * Process 11h Channel Switch Announcement (CSA) ie. If this * is the first CSA then initiate the switch. Otherwise we * track state and trigger completion and/or cancel of the switch. * XXX should be public for IBSS use */ static void ieee80211_parse_csaparams(struct ieee80211vap *vap, uint8_t *frm, const struct ieee80211_frame *wh) { struct ieee80211com *ic = vap->iv_ic; const struct ieee80211_csa_ie *csa = (const struct ieee80211_csa_ie *) frm; KASSERT(vap->iv_state >= IEEE80211_S_RUN, ("state %s", ieee80211_state_name[vap->iv_state])); if (csa->csa_mode > 1) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, wh, "CSA", "invalid mode %u", csa->csa_mode); return; } IEEE80211_LOCK(ic); if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { /* * Convert the channel number to a channel reference. We * try first to preserve turbo attribute of the current * channel then fallback. Note this will not work if the * CSA specifies a channel that requires a band switch (e.g. * 11a => 11g). This is intentional as 11h is defined only * for 5GHz/11a and because the switch does not involve a * reassociation, protocol state (capabilities, negotated * rates, etc) may/will be wrong. */ struct ieee80211_channel *c = ieee80211_find_channel_byieee(ic, csa->csa_newchan, (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALLTURBO)); if (c == NULL) { c = ieee80211_find_channel_byieee(ic, csa->csa_newchan, (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALL)); if (c == NULL) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, wh, "CSA", "invalid channel %u", csa->csa_newchan); goto done; } } #if IEEE80211_CSA_COUNT_MIN > 0 if (csa->csa_count < IEEE80211_CSA_COUNT_MIN) { /* * Require at least IEEE80211_CSA_COUNT_MIN count to * reduce the risk of being redirected by a fabricated * CSA. If a valid CSA is dropped we'll still get a * beacon miss when the AP leaves the channel so we'll * eventually follow to the new channel. * * NOTE: this violates the 11h spec that states that * count may be any value and if 0 then a switch * should happen asap. */ IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, wh, "CSA", "count %u too small, must be >= %u", csa->csa_count, IEEE80211_CSA_COUNT_MIN); goto done; } #endif ieee80211_csa_startswitch(ic, c, csa->csa_mode, csa->csa_count); } else { /* * Validate this ie against the initial CSA. We require * mode and channel not change and the count must be * monotonically decreasing. This may be pointless and * canceling the switch as a result may be too paranoid but * in the worst case if we drop out of CSA because of this * and the AP does move then we'll just end up taking a * beacon miss and scan to find the AP. * * XXX may want <= on count as we also process ProbeResp * frames and those may come in w/ the same count as the * previous beacon; but doing so leaves us open to a stuck * count until we add a dead-man timer */ if (!(csa->csa_count < ic->ic_csa_count && csa->csa_mode == ic->ic_csa_mode && csa->csa_newchan == ieee80211_chan2ieee(ic, ic->ic_csa_newchan))) { IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_DOTH, wh, "CSA ie mismatch, initial ie <%d,%d,%d>, " "this ie <%d,%d,%d>", ic->ic_csa_mode, ic->ic_csa_newchan, ic->ic_csa_count, csa->csa_mode, csa->csa_newchan, csa->csa_count); ieee80211_csa_cancelswitch(ic); } else { if (csa->csa_count <= 1) ieee80211_csa_completeswitch(ic); else ic->ic_csa_count = csa->csa_count; } } done: IEEE80211_UNLOCK(ic); } /* * Return non-zero if a background scan may be continued: * o bg scan is active * o no channel switch is pending * o there has not been any traffic recently * * Note we do not check if there is an administrative enable; * this is only done to start the scan. We assume that any * change in state will be accompanied by a request to cancel * active scans which will otherwise cause this test to fail. */ static __inline int contbgscan(struct ieee80211vap *vap) { struct ieee80211com *ic = vap->iv_ic; return ((ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN) && (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && vap->iv_state == IEEE80211_S_RUN && /* XXX? */ ieee80211_time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)); } /* * Return non-zero if a backgrond scan may be started: * o bg scanning is administratively enabled * o no channel switch is pending * o we are not boosted on a dynamic turbo channel * o there has not been a scan recently * o there has not been any traffic recently */ static __inline int startbgscan(struct ieee80211vap *vap) { struct ieee80211com *ic = vap->iv_ic; return ((vap->iv_flags & IEEE80211_F_BGSCAN) && (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && #ifdef IEEE80211_SUPPORT_SUPERG !IEEE80211_IS_CHAN_DTURBO(ic->ic_curchan) && #endif ieee80211_time_after(ticks, ic->ic_lastscan + vap->iv_bgscanintvl) && ieee80211_time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)); } static void sta_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, const struct ieee80211_rx_stats *rxs, int rssi, int nf) { #define ISPROBE(_st) ((_st) == IEEE80211_FC0_SUBTYPE_PROBE_RESP) #define ISREASSOC(_st) ((_st) == IEEE80211_FC0_SUBTYPE_REASSOC_RESP) struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; struct ieee80211_channel *rxchan = ic->ic_curchan; struct ieee80211_frame *wh; uint8_t *frm, *efrm; uint8_t *rates, *xrates, *wme, *htcap, *htinfo; uint8_t rate; int ht_state_change = 0; wh = mtod(m0, struct ieee80211_frame *); frm = (uint8_t *)&wh[1]; efrm = mtod(m0, uint8_t *) + m0->m_len; switch (subtype) { case IEEE80211_FC0_SUBTYPE_PROBE_RESP: case IEEE80211_FC0_SUBTYPE_BEACON: { struct ieee80211_scanparams scan; struct ieee80211_channel *c; /* * We process beacon/probe response frames: * o when scanning, or * o station mode when associated (to collect state * updates such as 802.11g slot time) * Frames otherwise received are discarded. */ if (!((ic->ic_flags & IEEE80211_F_SCAN) || ni->ni_associd)) { vap->iv_stats.is_rx_mgtdiscard++; return; } /* Override RX channel as appropriate */ if (rxs != NULL) { c = ieee80211_lookup_channel_rxstatus(vap, rxs); if (c != NULL) rxchan = c; } /* XXX probe response in sta mode when !scanning? */ if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0) { if (! (ic->ic_flags & IEEE80211_F_SCAN)) vap->iv_stats.is_beacon_bad++; return; } /* * Count frame now that we know it's to be processed. */ if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { vap->iv_stats.is_rx_beacon++; /* XXX remove */ IEEE80211_NODE_STAT(ni, rx_beacons); } else IEEE80211_NODE_STAT(ni, rx_proberesp); /* * When operating in station mode, check for state updates. * Be careful to ignore beacons received while doing a * background scan. We consider only 11g/WMM stuff right now. */ if (ni->ni_associd != 0 && ((ic->ic_flags & IEEE80211_F_SCAN) == 0 || IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_bssid))) { /* record tsf of last beacon */ memcpy(ni->ni_tstamp.data, scan.tstamp, sizeof(ni->ni_tstamp)); /* count beacon frame for s/w bmiss handling */ vap->iv_swbmiss_count++; vap->iv_bmiss_count = 0; if (ni->ni_erp != scan.erp) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, wh->i_addr2, "erp change: was 0x%x, now 0x%x", ni->ni_erp, scan.erp); if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) ic->ic_flags |= IEEE80211_F_USEPROT; else ic->ic_flags &= ~IEEE80211_F_USEPROT; ni->ni_erp = scan.erp; /* XXX statistic */ /* XXX driver notification */ } if ((ni->ni_capinfo ^ scan.capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, wh->i_addr2, "capabilities change: was 0x%x, now 0x%x", ni->ni_capinfo, scan.capinfo); /* * NB: we assume short preamble doesn't * change dynamically */ ieee80211_set_shortslottime(ic, IEEE80211_IS_CHAN_A(ic->ic_bsschan) || (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); ni->ni_capinfo = (ni->ni_capinfo &~ IEEE80211_CAPINFO_SHORT_SLOTTIME) | (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME); /* XXX statistic */ } if (scan.wme != NULL && (ni->ni_flags & IEEE80211_NODE_QOS) && ieee80211_parse_wmeparams(vap, scan.wme, wh) > 0) ieee80211_wme_updateparams(vap); #ifdef IEEE80211_SUPPORT_SUPERG if (scan.ath != NULL) ieee80211_parse_athparams(ni, scan.ath, wh); #endif if (scan.htcap != NULL && scan.htinfo != NULL && (vap->iv_flags_ht & IEEE80211_FHT_HT)) { /* XXX state changes? */ if (ieee80211_ht_updateparams(ni, scan.htcap, scan.htinfo)) ht_state_change = 1; } if (scan.quiet) ic->ic_set_quiet(ni, scan.quiet); if (scan.tim != NULL) { struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) scan.tim; /* * XXX Check/debug this code; see if it's about * the right time to force the VAP awake if we * receive a frame destined for us? */ int aid = IEEE80211_AID(ni->ni_associd); int ix = aid / NBBY; int min = tim->tim_bitctl &~ 1; int max = tim->tim_len + min - 4; int tim_ucast = 0, tim_mcast = 0; /* * Only do this for unicast traffic in the TIM * The multicast traffic notification for * the scan notification stuff should occur * differently. */ if (min <= ix && ix <= max && isset(tim->tim_bitmap - min, aid)) { tim_ucast = 1; } /* * Do a separate notification * for the multicast bit being set. */ if (tim->tim_bitctl & 1) { tim_mcast = 1; } /* * If the TIM indicates there's traffic for * us then get us out of STA mode powersave. */ if (tim_ucast == 1) { /* * Wake us out of SLEEP state if we're * in it; and if we're doing bgscan * then wake us out of STA powersave. */ ieee80211_sta_tim_notify(vap, 1); /* * This is preventing us from * continuing a bgscan; because it * tricks the contbgscan() * routine to think there's always * traffic for us. * * I think we need both an RX and * TX ic_lastdata field. */ ic->ic_lastdata = ticks; } ni->ni_dtim_count = tim->tim_count; ni->ni_dtim_period = tim->tim_period; } if (scan.csa != NULL && (vap->iv_flags & IEEE80211_F_DOTH)) ieee80211_parse_csaparams(vap, scan.csa, wh); else if (ic->ic_flags & IEEE80211_F_CSAPENDING) { /* * No CSA ie or 11h disabled, but a channel * switch is pending; drop out so we aren't * stuck in CSA state. If the AP really is * moving we'll get a beacon miss and scan. */ IEEE80211_LOCK(ic); ieee80211_csa_cancelswitch(ic); IEEE80211_UNLOCK(ic); } /* * If scanning, pass the info to the scan module. * Otherwise, check if it's the right time to do * a background scan. Background scanning must * be enabled and we must not be operating in the * turbo phase of dynamic turbo mode. Then, * it's been a while since the last background * scan and if no data frames have come through * recently, kick off a scan. Note that this * is the mechanism by which a background scan * is started _and_ continued each time we * return on-channel to receive a beacon from * our ap. */ if (ic->ic_flags & IEEE80211_F_SCAN) { ieee80211_add_scan(vap, rxchan, &scan, wh, subtype, rssi, nf); } else if (contbgscan(vap)) { ieee80211_bg_scan(vap, 0); } else if (startbgscan(vap)) { vap->iv_stats.is_scan_bg++; #if 0 /* wakeup if we are sleeing */ ieee80211_set_pwrsave(vap, 0); #endif ieee80211_bg_scan(vap, 0); } /* * Put the station to sleep if we haven't seen * traffic in a while. */ IEEE80211_LOCK(ic); ieee80211_sta_ps_timer_check(vap); IEEE80211_UNLOCK(ic); /* * If we've had a channel width change (eg HT20<->HT40) * then schedule a delayed driver notification. */ if (ht_state_change) ieee80211_update_chw(ic); return; } /* * If scanning, just pass information to the scan module. */ if (ic->ic_flags & IEEE80211_F_SCAN) { if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { /* * Actively scanning a channel marked passive; * send a probe request now that we know there * is 802.11 traffic present. * * XXX check if the beacon we recv'd gives * us what we need and suppress the probe req */ ieee80211_probe_curchan(vap, 1); ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; } ieee80211_add_scan(vap, rxchan, &scan, wh, subtype, rssi, nf); return; } break; } case IEEE80211_FC0_SUBTYPE_AUTH: { uint16_t algo, seq, status; /* * auth frame format * [2] algorithm * [2] sequence * [2] status * [tlv*] challenge */ IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); algo = le16toh(*(uint16_t *)frm); seq = le16toh(*(uint16_t *)(frm + 2)); status = le16toh(*(uint16_t *)(frm + 4)); IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2, "recv auth frame with algorithm %d seq %d", algo, seq); if (vap->iv_flags & IEEE80211_F_COUNTERM) { IEEE80211_DISCARD(vap, IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO, wh, "auth", "%s", "TKIP countermeasures enabled"); vap->iv_stats.is_rx_auth_countermeasures++; if (vap->iv_opmode == IEEE80211_M_HOSTAP) { ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_AUTH, IEEE80211_REASON_MIC_FAILURE); } return; } if (algo == IEEE80211_AUTH_ALG_SHARED) sta_auth_shared(ni, wh, frm + 6, efrm, rssi, nf, seq, status); else if (algo == IEEE80211_AUTH_ALG_OPEN) sta_auth_open(ni, wh, rssi, nf, seq, status); else { IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, wh, "auth", "unsupported alg %d", algo); vap->iv_stats.is_rx_auth_unsupported++; return; } break; } case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: { uint16_t capinfo, associd; uint16_t status; if (vap->iv_state != IEEE80211_S_ASSOC) { vap->iv_stats.is_rx_mgtdiscard++; return; } /* * asresp frame format * [2] capability information * [2] status * [2] association ID * [tlv] supported rates * [tlv] extended supported rates * [tlv] WME * [tlv] HT capabilities * [tlv] HT info */ IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); ni = vap->iv_bss; capinfo = le16toh(*(uint16_t *)frm); frm += 2; status = le16toh(*(uint16_t *)frm); frm += 2; if (status != 0) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, wh->i_addr2, "%sassoc failed (reason %d)", ISREASSOC(subtype) ? "re" : "", status); vap->iv_stats.is_rx_auth_fail++; /* XXX */ return; } associd = le16toh(*(uint16_t *)frm); frm += 2; rates = xrates = wme = htcap = htinfo = NULL; while (efrm - frm > 1) { IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); switch (*frm) { case IEEE80211_ELEMID_RATES: rates = frm; break; case IEEE80211_ELEMID_XRATES: xrates = frm; break; case IEEE80211_ELEMID_HTCAP: htcap = frm; break; case IEEE80211_ELEMID_HTINFO: htinfo = frm; break; case IEEE80211_ELEMID_VENDOR: if (iswmeoui(frm)) wme = frm; else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) { /* * Accept pre-draft HT ie's if the * standard ones have not been seen. */ if (ishtcapoui(frm)) { if (htcap == NULL) htcap = frm; } else if (ishtinfooui(frm)) { if (htinfo == NULL) htinfo = frm; } } /* XXX Atheros OUI support */ break; } frm += frm[1] + 2; } IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); if (xrates != NULL) IEEE80211_VERIFY_ELEMENT(xrates, IEEE80211_RATE_MAXSIZE - rates[1], return); rate = ieee80211_setup_rates(ni, rates, xrates, IEEE80211_F_JOIN | IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | IEEE80211_F_DONEGO | IEEE80211_F_DODEL); if (rate & IEEE80211_RATE_BASIC) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, wh->i_addr2, "%sassoc failed (rate set mismatch)", ISREASSOC(subtype) ? "re" : ""); vap->iv_stats.is_rx_assoc_norate++; ieee80211_new_state(vap, IEEE80211_S_SCAN, IEEE80211_SCAN_FAIL_STATUS); return; } ni->ni_capinfo = capinfo; ni->ni_associd = associd; if (ni->ni_jointime == 0) ni->ni_jointime = time_uptime; if (wme != NULL && ieee80211_parse_wmeparams(vap, wme, wh) >= 0) { ni->ni_flags |= IEEE80211_NODE_QOS; ieee80211_wme_updateparams(vap); } else ni->ni_flags &= ~IEEE80211_NODE_QOS; /* * Setup HT state according to the negotiation. * * NB: shouldn't need to check if HT use is enabled but some * ap's send back HT ie's even when we don't indicate we * are HT capable in our AssocReq. */ if (htcap != NULL && htinfo != NULL && (vap->iv_flags_ht & IEEE80211_FHT_HT)) { ieee80211_ht_node_init(ni); ieee80211_ht_updateparams(ni, htcap, htinfo); ieee80211_setup_htrates(ni, htcap, IEEE80211_F_JOIN | IEEE80211_F_DOBRS); ieee80211_setup_basic_htrates(ni, htinfo); ieee80211_node_setuptxparms(ni); ieee80211_ratectl_node_init(ni); } /* * Always initialise FF/superg state; we can use this * for doing A-MSDU encapsulation as well. */ #ifdef IEEE80211_SUPPORT_SUPERG ieee80211_ff_node_init(ni); #endif /* * Configure state now that we are associated. * * XXX may need different/additional driver callbacks? */ if (IEEE80211_IS_CHAN_A(ic->ic_curchan) || (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { ic->ic_flags |= IEEE80211_F_SHPREAMBLE; ic->ic_flags &= ~IEEE80211_F_USEBARKER; } else { ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; ic->ic_flags |= IEEE80211_F_USEBARKER; } ieee80211_set_shortslottime(ic, IEEE80211_IS_CHAN_A(ic->ic_curchan) || (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); /* * Honor ERP protection. * * NB: ni_erp should zero for non-11g operation. */ if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) ic->ic_flags |= IEEE80211_F_USEPROT; else ic->ic_flags &= ~IEEE80211_F_USEPROT; IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, wh->i_addr2, "%sassoc success at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", ISREASSOC(subtype) ? "re" : "", IEEE80211_NODE_AID(ni), ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "", ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", ni->ni_flags & IEEE80211_NODE_HT ? (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? ", fast-frames" : "", IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? ", turbo" : "" ); ieee80211_new_state(vap, IEEE80211_S_RUN, subtype); break; } case IEEE80211_FC0_SUBTYPE_DEAUTH: { uint16_t reason; if (vap->iv_state == IEEE80211_S_SCAN) { vap->iv_stats.is_rx_mgtdiscard++; return; } if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { /* NB: can happen when in promiscuous mode */ vap->iv_stats.is_rx_mgtdiscard++; break; } /* * deauth frame format * [2] reason */ IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); reason = le16toh(*(uint16_t *)frm); vap->iv_stats.is_rx_deauth++; vap->iv_stats.is_rx_deauth_code = reason; IEEE80211_NODE_STAT(ni, rx_deauth); IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, "recv deauthenticate (reason: %d (%s))", reason, ieee80211_reason_to_string(reason)); ieee80211_new_state(vap, IEEE80211_S_AUTH, (reason << 8) | IEEE80211_FC0_SUBTYPE_DEAUTH); break; } case IEEE80211_FC0_SUBTYPE_DISASSOC: { uint16_t reason; if (vap->iv_state != IEEE80211_S_RUN && vap->iv_state != IEEE80211_S_ASSOC && vap->iv_state != IEEE80211_S_AUTH) { vap->iv_stats.is_rx_mgtdiscard++; return; } if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { /* NB: can happen when in promiscuous mode */ vap->iv_stats.is_rx_mgtdiscard++; break; } /* * disassoc frame format * [2] reason */ IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); reason = le16toh(*(uint16_t *)frm); vap->iv_stats.is_rx_disassoc++; vap->iv_stats.is_rx_disassoc_code = reason; IEEE80211_NODE_STAT(ni, rx_disassoc); IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, "recv disassociate (reason: %d (%s))", reason, ieee80211_reason_to_string(reason)); ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); break; } case IEEE80211_FC0_SUBTYPE_ACTION: case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && !IEEE80211_IS_MULTICAST(wh->i_addr1)) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "not for us"); vap->iv_stats.is_rx_mgtdiscard++; } else if (vap->iv_state != IEEE80211_S_RUN) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "wrong state %s", ieee80211_state_name[vap->iv_state]); vap->iv_stats.is_rx_mgtdiscard++; } else { if (ieee80211_parse_action(ni, m0) == 0) (void)ic->ic_recv_action(ni, wh, frm, efrm); } break; case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: case IEEE80211_FC0_SUBTYPE_PROBE_REQ: case IEEE80211_FC0_SUBTYPE_TIMING_ADV: case IEEE80211_FC0_SUBTYPE_ATIM: IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "not handled"); vap->iv_stats.is_rx_mgtdiscard++; break; default: IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, wh, "mgt", "subtype 0x%x not handled", subtype); vap->iv_stats.is_rx_badsubtype++; break; } #undef ISREASSOC #undef ISPROBE } static void sta_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) { switch (subtype) { case IEEE80211_FC0_SUBTYPE_BAR: ieee80211_recv_bar(ni, m); break; } } Index: head/sys/net80211/ieee80211_tdma.c =================================================================== --- head/sys/net80211/ieee80211_tdma.c (revision 298375) +++ head/sys/net80211/ieee80211_tdma.c (revision 298376) @@ -1,828 +1,827 @@ /*- * Copyright (c) 2007-2009 Sam Leffler, Errno Consulting * Copyright (c) 2007-2009 Intel Corporation * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include #ifdef __FreeBSD__ __FBSDID("$FreeBSD$"); #endif /* * IEEE 802.11 TDMA mode support. */ #include "opt_inet.h" #include "opt_tdma.h" #include "opt_wlan.h" #ifdef IEEE80211_SUPPORT_TDMA #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef TDMA_SLOTLEN_DEFAULT #define TDMA_SLOTLEN_DEFAULT 10*1000 /* 10ms */ #endif #ifndef TDMA_SLOTCNT_DEFAULT #define TDMA_SLOTCNT_DEFAULT 2 /* 2x (pt-to-pt) */ #endif #ifndef TDMA_BINTVAL_DEFAULT #define TDMA_BINTVAL_DEFAULT 5 /* 5x ~= 100TU beacon intvl */ #endif #ifndef TDMA_TXRATE_11B_DEFAULT #define TDMA_TXRATE_11B_DEFAULT 2*11 #endif #ifndef TDMA_TXRATE_11G_DEFAULT #define TDMA_TXRATE_11G_DEFAULT 2*24 #endif #ifndef TDMA_TXRATE_11A_DEFAULT #define TDMA_TXRATE_11A_DEFAULT 2*24 #endif #ifndef TDMA_TXRATE_TURBO_DEFAULT #define TDMA_TXRATE_TURBO_DEFAULT 2*24 #endif #ifndef TDMA_TXRATE_HALF_DEFAULT #define TDMA_TXRATE_HALF_DEFAULT 2*12 #endif #ifndef TDMA_TXRATE_QUARTER_DEFAULT #define TDMA_TXRATE_QUARTER_DEFAULT 2*6 #endif #ifndef TDMA_TXRATE_11NA_DEFAULT #define TDMA_TXRATE_11NA_DEFAULT (4 | IEEE80211_RATE_MCS) #endif #ifndef TDMA_TXRATE_11NG_DEFAULT #define TDMA_TXRATE_11NG_DEFAULT (4 | IEEE80211_RATE_MCS) #endif #define TDMA_VERSION_VALID(_version) \ (TDMA_VERSION_V2 <= (_version) && (_version) <= TDMA_VERSION) #define TDMA_SLOTCNT_VALID(_slotcnt) \ (2 <= (_slotcnt) && (_slotcnt) <= TDMA_MAXSLOTS) /* XXX magic constants */ #define TDMA_SLOTLEN_VALID(_slotlen) \ (2*100 <= (_slotlen) && (unsigned)(_slotlen) <= 0xfffff) /* XXX probably should set a max */ #define TDMA_BINTVAL_VALID(_bintval) (1 <= (_bintval)) /* * This code is not prepared to handle more than 2 slots. */ CTASSERT(TDMA_MAXSLOTS == 2); static void tdma_vdetach(struct ieee80211vap *vap); static int tdma_newstate(struct ieee80211vap *, enum ieee80211_state, int); static void tdma_beacon_miss(struct ieee80211vap *vap); static void tdma_recv_mgmt(struct ieee80211_node *, struct mbuf *, int subtype, const struct ieee80211_rx_stats *rxs, int rssi, int nf); static int tdma_update(struct ieee80211vap *vap, const struct ieee80211_tdma_param *tdma, struct ieee80211_node *ni, int pickslot); static int tdma_process_params(struct ieee80211_node *ni, const u_int8_t *ie, int rssi, int nf, const struct ieee80211_frame *wh); static void settxparms(struct ieee80211vap *vap, enum ieee80211_phymode mode, int rate) { vap->iv_txparms[mode].ucastrate = rate; vap->iv_txparms[mode].mcastrate = rate; } static void setackpolicy(struct ieee80211com *ic, int noack) { struct ieee80211_wme_state *wme = &ic->ic_wme; int ac; for (ac = 0; ac < WME_NUM_AC; ac++) { wme->wme_chanParams.cap_wmeParams[ac].wmep_noackPolicy = noack; wme->wme_wmeChanParams.cap_wmeParams[ac].wmep_noackPolicy = noack; } } void ieee80211_tdma_vattach(struct ieee80211vap *vap) { struct ieee80211_tdma_state *ts; KASSERT(vap->iv_caps & IEEE80211_C_TDMA, ("not a tdma vap, caps 0x%x", vap->iv_caps)); ts = (struct ieee80211_tdma_state *) IEEE80211_MALLOC( sizeof(struct ieee80211_tdma_state), M_80211_VAP, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); if (ts == NULL) { printf("%s: cannot allocate TDMA state block\n", __func__); /* NB: fall back to adhdemo mode */ vap->iv_caps &= ~IEEE80211_C_TDMA; return; } /* NB: default configuration is passive so no beacons */ ts->tdma_version = TDMA_VERSION; ts->tdma_slotlen = TDMA_SLOTLEN_DEFAULT; ts->tdma_slotcnt = TDMA_SLOTCNT_DEFAULT; ts->tdma_bintval = TDMA_BINTVAL_DEFAULT; ts->tdma_slot = 1; /* passive operation */ /* setup default fixed rates */ settxparms(vap, IEEE80211_MODE_11A, TDMA_TXRATE_11A_DEFAULT); settxparms(vap, IEEE80211_MODE_11B, TDMA_TXRATE_11B_DEFAULT); settxparms(vap, IEEE80211_MODE_11G, TDMA_TXRATE_11G_DEFAULT); settxparms(vap, IEEE80211_MODE_TURBO_A, TDMA_TXRATE_TURBO_DEFAULT); settxparms(vap, IEEE80211_MODE_TURBO_G, TDMA_TXRATE_TURBO_DEFAULT); settxparms(vap, IEEE80211_MODE_STURBO_A, TDMA_TXRATE_TURBO_DEFAULT); settxparms(vap, IEEE80211_MODE_11NA, TDMA_TXRATE_11NA_DEFAULT); settxparms(vap, IEEE80211_MODE_11NG, TDMA_TXRATE_11NG_DEFAULT); settxparms(vap, IEEE80211_MODE_HALF, TDMA_TXRATE_HALF_DEFAULT); settxparms(vap, IEEE80211_MODE_QUARTER, TDMA_TXRATE_QUARTER_DEFAULT); setackpolicy(vap->iv_ic, 1); /* disable ACK's */ ts->tdma_opdetach = vap->iv_opdetach; vap->iv_opdetach = tdma_vdetach; ts->tdma_newstate = vap->iv_newstate; vap->iv_newstate = tdma_newstate; vap->iv_bmiss = tdma_beacon_miss; ts->tdma_recv_mgmt = vap->iv_recv_mgmt; vap->iv_recv_mgmt = tdma_recv_mgmt; vap->iv_tdma = ts; } static void tdma_vdetach(struct ieee80211vap *vap) { struct ieee80211_tdma_state *ts = vap->iv_tdma; if (ts == NULL) { /* NB: should not have touched any ic state */ return; } ts->tdma_opdetach(vap); IEEE80211_FREE(vap->iv_tdma, M_80211_VAP); vap->iv_tdma = NULL; setackpolicy(vap->iv_ic, 0); /* enable ACK's */ } static void sta_leave(void *arg, struct ieee80211_node *ni) { struct ieee80211vap *vap = arg; if (ni->ni_vap == vap && ni != vap->iv_bss) ieee80211_node_leave(ni); } /* * TDMA state machine handler. */ static int tdma_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) { struct ieee80211_tdma_state *ts = vap->iv_tdma; struct ieee80211com *ic = vap->iv_ic; enum ieee80211_state ostate; int status; IEEE80211_LOCK_ASSERT(ic); ostate = vap->iv_state; IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", __func__, ieee80211_state_name[ostate], ieee80211_state_name[nstate], arg); if (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS) callout_stop(&vap->iv_swbmiss); if (nstate == IEEE80211_S_SCAN && (ostate == IEEE80211_S_INIT || ostate == IEEE80211_S_RUN) && ts->tdma_slot != 0) { /* * Override adhoc behaviour when operating as a slave; * we need to scan even if the channel is locked. */ vap->iv_state = nstate; /* state transition */ ieee80211_cancel_scan(vap); /* background scan */ if (ostate == IEEE80211_S_RUN) { /* purge station table; entries are stale */ ieee80211_iterate_nodes(&ic->ic_sta, sta_leave, vap); } if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { ieee80211_check_scan(vap, vap->iv_scanreq_flags, vap->iv_scanreq_duration, vap->iv_scanreq_mindwell, vap->iv_scanreq_maxdwell, vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; } else ieee80211_check_scan_current(vap); status = 0; } else { status = ts->tdma_newstate(vap, nstate, arg); } if (status == 0 && nstate == IEEE80211_S_RUN && ostate != IEEE80211_S_RUN && (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS) && ts->tdma_slot != 0 && vap->iv_des_chan == IEEE80211_CHAN_ANYC) { /* * Start s/w beacon miss timer for slave devices w/o * hardware support. Note we do this only if we're * not locked to a channel (i.e. roam to follow the * master). The 2x is a fudge for our doing this in * software. */ vap->iv_swbmiss_period = IEEE80211_TU_TO_TICKS( 2 * vap->iv_bmissthreshold * ts->tdma_bintval * ((ts->tdma_slotcnt * ts->tdma_slotlen) / 1024)); vap->iv_swbmiss_count = 0; callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, ieee80211_swbmiss, vap); } return status; } static void tdma_beacon_miss(struct ieee80211vap *vap) { struct ieee80211_tdma_state *ts = vap->iv_tdma; IEEE80211_LOCK_ASSERT(vap->iv_ic); KASSERT((vap->iv_ic->ic_flags & IEEE80211_F_SCAN) == 0, ("scanning")); KASSERT(vap->iv_state == IEEE80211_S_RUN, ("wrong state %d", vap->iv_state)); IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_TDMA | IEEE80211_MSG_DEBUG, "beacon miss, mode %u state %s\n", vap->iv_opmode, ieee80211_state_name[vap->iv_state]); callout_stop(&vap->iv_swbmiss); if (ts->tdma_peer != NULL) { /* XXX? can this be null? */ ieee80211_notify_node_leave(vap->iv_bss); ts->tdma_peer = NULL; /* * Treat beacon miss like an associate failure wrt the * scan policy; this forces the entry in the scan cache * to be ignored after several tries. */ ieee80211_scan_assoc_fail(vap, vap->iv_bss->ni_macaddr, IEEE80211_STATUS_TIMEOUT); } #if 0 ts->tdma_inuse = 0; /* clear slot usage */ #endif ieee80211_new_state(vap, IEEE80211_S_SCAN, 0); } static void tdma_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, const struct ieee80211_rx_stats *rxs, int rssi, int nf) { struct ieee80211com *ic = ni->ni_ic; struct ieee80211vap *vap = ni->ni_vap; struct ieee80211_tdma_state *ts = vap->iv_tdma; if (subtype == IEEE80211_FC0_SUBTYPE_BEACON && (ic->ic_flags & IEEE80211_F_SCAN) == 0) { struct ieee80211_frame *wh = mtod(m0, struct ieee80211_frame *); struct ieee80211_scanparams scan; /* XXX TODO: use rxstatus to determine off-channel beacons */ if (ieee80211_parse_beacon(ni, m0, ic->ic_curchan, &scan) != 0) return; if (scan.tdma == NULL) { /* * TDMA stations must beacon a TDMA ie; ignore * any other station. * XXX detect overlapping bss and change channel */ IEEE80211_DISCARD(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT, - wh, ieee80211_mgt_subtype_name[subtype >> - IEEE80211_FC0_SUBTYPE_SHIFT], + wh, ieee80211_mgt_subtype_name(subtype), "%s", "no TDMA ie"); vap->iv_stats.is_rx_mgtdiscard++; return; } if (ni == vap->iv_bss && !IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { /* * Fake up a node for this newly * discovered member of the IBSS. */ ni = ieee80211_add_neighbor(vap, wh, &scan); if (ni == NULL) { /* NB: stat kept for alloc failure */ return; } } /* * Check for state updates. */ if (IEEE80211_ADDR_EQ(wh->i_addr3, ni->ni_bssid)) { /* * Count frame now that we know it's to be processed. */ vap->iv_stats.is_rx_beacon++; IEEE80211_NODE_STAT(ni, rx_beacons); /* * Record tsf of last beacon. NB: this must be * done before calling tdma_process_params * as deeper routines reference it. */ memcpy(&ni->ni_tstamp.data, scan.tstamp, sizeof(ni->ni_tstamp.data)); /* * Count beacon frame for s/w bmiss handling. */ vap->iv_swbmiss_count++; /* * Process tdma ie. The contents are used to sync * the slot timing, reconfigure the bss, etc. */ (void) tdma_process_params(ni, scan.tdma, rssi, nf, wh); return; } /* * NB: defer remaining work to the adhoc code; this causes * 2x parsing of the frame but should happen infrequently */ } ts->tdma_recv_mgmt(ni, m0, subtype, rxs, rssi, nf); } /* * Update TDMA state on receipt of a beacon frame with * a TDMA information element. The sender's identity * is provided so we can track who our peer is. If pickslot * is non-zero we scan the slot allocation state in the ie * to locate a free slot for our use. */ static int tdma_update(struct ieee80211vap *vap, const struct ieee80211_tdma_param *tdma, struct ieee80211_node *ni, int pickslot) { struct ieee80211_tdma_state *ts = vap->iv_tdma; int slot, slotlen, update; KASSERT(vap->iv_caps & IEEE80211_C_TDMA, ("not a tdma vap, caps 0x%x", vap->iv_caps)); update = 0; if (tdma->tdma_slotcnt != ts->tdma_slotcnt) { if (!TDMA_SLOTCNT_VALID(tdma->tdma_slotcnt)) { if (ppsratecheck(&ts->tdma_lastprint, &ts->tdma_fails, 1)) printf("%s: bad slot cnt %u\n", __func__, tdma->tdma_slotcnt); return 0; } update |= TDMA_UPDATE_SLOTCNT; } slotlen = le16toh(tdma->tdma_slotlen) * 100; if (slotlen != ts->tdma_slotlen) { if (!TDMA_SLOTLEN_VALID(slotlen)) { if (ppsratecheck(&ts->tdma_lastprint, &ts->tdma_fails, 1)) printf("%s: bad slot len %u\n", __func__, slotlen); return 0; } update |= TDMA_UPDATE_SLOTLEN; } if (tdma->tdma_bintval != ts->tdma_bintval) { if (!TDMA_BINTVAL_VALID(tdma->tdma_bintval)) { if (ppsratecheck(&ts->tdma_lastprint, &ts->tdma_fails, 1)) printf("%s: bad beacon interval %u\n", __func__, tdma->tdma_bintval); return 0; } update |= TDMA_UPDATE_BINTVAL; } slot = ts->tdma_slot; if (pickslot) { /* * Pick unoccupied slot. Note we never choose slot 0. */ for (slot = tdma->tdma_slotcnt-1; slot > 0; slot--) if (isclr(tdma->tdma_inuse, slot)) break; if (slot <= 0) { printf("%s: no free slot, slotcnt %u inuse: 0x%x\n", __func__, tdma->tdma_slotcnt, tdma->tdma_inuse[0]); /* XXX need to do something better */ return 0; } if (slot != ts->tdma_slot) update |= TDMA_UPDATE_SLOT; } if (ni != ts->tdma_peer) { /* update everything */ update = TDMA_UPDATE_SLOT | TDMA_UPDATE_SLOTCNT | TDMA_UPDATE_SLOTLEN | TDMA_UPDATE_BINTVAL; } if (update) { /* * New/changed parameters; update runtime state. */ /* XXX overwrites user parameters */ if (update & TDMA_UPDATE_SLOTCNT) ts->tdma_slotcnt = tdma->tdma_slotcnt; if (update & TDMA_UPDATE_SLOTLEN) ts->tdma_slotlen = slotlen; if (update & TDMA_UPDATE_SLOT) ts->tdma_slot = slot; if (update & TDMA_UPDATE_BINTVAL) ts->tdma_bintval = tdma->tdma_bintval; /* mark beacon to be updated before next xmit */ ieee80211_beacon_notify(vap, IEEE80211_BEACON_TDMA); IEEE80211_DPRINTF(vap, IEEE80211_MSG_TDMA, "%s: slot %u slotcnt %u slotlen %u us bintval %u\n", __func__, ts->tdma_slot, ts->tdma_slotcnt, ts->tdma_slotlen, ts->tdma_bintval); } /* * Notify driver. Note we can be called before * entering RUN state if we scanned and are * joining an existing bss. In that case do not * call the driver because not all necessary state * has been setup. The next beacon will dtrt. */ if (vap->iv_state == IEEE80211_S_RUN) vap->iv_ic->ic_tdma_update(ni, tdma, update); /* * Dispatch join event on first beacon from new master. */ if (ts->tdma_peer != ni) { if (ts->tdma_peer != NULL) ieee80211_notify_node_leave(vap->iv_bss); ieee80211_notify_node_join(ni, 1); /* NB: no reference, we just use the address */ ts->tdma_peer = ni; } return 1; } /* * Process received TDMA parameters. */ static int tdma_process_params(struct ieee80211_node *ni, const u_int8_t *ie, int rssi, int nf, const struct ieee80211_frame *wh) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211_tdma_state *ts = vap->iv_tdma; const struct ieee80211_tdma_param *tdma = (const struct ieee80211_tdma_param *) ie; u_int len = ie[1]; KASSERT(vap->iv_caps & IEEE80211_C_TDMA, ("not a tdma vap, caps 0x%x", vap->iv_caps)); if (len < sizeof(*tdma) - 2) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_TDMA, wh, "tdma", "too short, len %u", len); return IEEE80211_REASON_IE_INVALID; } if (tdma->tdma_version != ts->tdma_version) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_TDMA, wh, "tdma", "bad version %u (ours %u)", tdma->tdma_version, ts->tdma_version); return IEEE80211_REASON_IE_INVALID; } /* * NB: ideally we'd check against tdma_slotcnt, but that * would require extra effort so do this easy check that * covers the work below; more stringent checks are done * before we make more extensive use of the ie contents. */ if (tdma->tdma_slot >= TDMA_MAXSLOTS) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_TDMA, wh, "tdma", "invalid slot %u", tdma->tdma_slot); return IEEE80211_REASON_IE_INVALID; } /* * Can reach here while scanning, update * operational state only in RUN state. */ if (vap->iv_state == IEEE80211_S_RUN) { if (tdma->tdma_slot != ts->tdma_slot && isclr(ts->tdma_inuse, tdma->tdma_slot)) { IEEE80211_NOTE(vap, IEEE80211_MSG_TDMA, ni, "discovered in slot %u", tdma->tdma_slot); setbit(ts->tdma_inuse, tdma->tdma_slot); /* XXX dispatch event only when operating as master */ if (ts->tdma_slot == 0) ieee80211_notify_node_join(ni, 1); } setbit(ts->tdma_active, tdma->tdma_slot); if (tdma->tdma_slot == ts->tdma_slot-1) { /* * Slave tsf synchronization to station * just before us in the schedule. The driver * is responsible for copying the timestamp * of the received beacon into our beacon * frame so the sender can calculate round * trip time. We cannot do that here because * we don't know how to update our beacon frame. */ (void) tdma_update(vap, tdma, ni, 0); /* XXX reschedule swbmiss timer on parameter change */ } else if (tdma->tdma_slot == ts->tdma_slot+1) { uint64_t tstamp; #if 0 uint32_t rstamp = (uint32_t) le64toh(rs->tsf); int32_t rtt; #endif /* * Use returned timstamp to calculate the * roundtrip time. */ memcpy(&tstamp, tdma->tdma_tstamp, 8); #if 0 /* XXX use only 15 bits of rstamp */ rtt = rstamp - (le64toh(tstamp) & 0x7fff); if (rtt < 0) rtt += 0x7fff; /* XXX hack to quiet normal use */ IEEE80211_DPRINTF(vap, IEEE80211_MSG_DOT1X, "tdma rtt %5u [rstamp %5u tstamp %llu]\n", rtt, rstamp, (unsigned long long) le64toh(tstamp)); #endif } else if (tdma->tdma_slot == ts->tdma_slot && le64toh(ni->ni_tstamp.tsf) > vap->iv_bss->ni_tstamp.tsf) { /* * Station using the same slot as us and has * been around longer than us; we must move. * Note this can happen if stations do not * see each other while scanning. */ IEEE80211_DPRINTF(vap, IEEE80211_MSG_TDMA, "slot %u collision rxtsf %llu tsf %llu\n", tdma->tdma_slot, (unsigned long long) le64toh(ni->ni_tstamp.tsf), vap->iv_bss->ni_tstamp.tsf); setbit(ts->tdma_inuse, tdma->tdma_slot); (void) tdma_update(vap, tdma, ni, 1); } } return 0; } int ieee80211_tdma_getslot(struct ieee80211vap *vap) { struct ieee80211_tdma_state *ts = vap->iv_tdma; KASSERT(vap->iv_caps & IEEE80211_C_TDMA, ("not a tdma vap, caps 0x%x", vap->iv_caps)); return ts->tdma_slot; } /* * Parse a TDMA ie on station join and use it to setup node state. */ void ieee80211_parse_tdma(struct ieee80211_node *ni, const uint8_t *ie) { struct ieee80211vap *vap = ni->ni_vap; if (vap->iv_caps & IEEE80211_C_TDMA) { const struct ieee80211_tdma_param *tdma = (const struct ieee80211_tdma_param *)ie; struct ieee80211_tdma_state *ts = vap->iv_tdma; /* * Adopt TDMA configuration when joining an * existing network. */ setbit(ts->tdma_inuse, tdma->tdma_slot); (void) tdma_update(vap, tdma, ni, 1); /* * Propagate capabilities based on the local * configuration and the remote station's advertised * capabilities. In particular this permits us to * enable use of QoS to disable ACK's. */ if ((vap->iv_flags & IEEE80211_F_WME) && ni->ni_ies.wme_ie != NULL) ni->ni_flags |= IEEE80211_NODE_QOS; } } #define TDMA_OUI_BYTES 0x00, 0x03, 0x7f /* * Add a TDMA parameters element to a frame. */ uint8_t * ieee80211_add_tdma(uint8_t *frm, struct ieee80211vap *vap) { #define ADDSHORT(frm, v) do { \ frm[0] = (v) & 0xff; \ frm[1] = (v) >> 8; \ frm += 2; \ } while (0) static const struct ieee80211_tdma_param param = { .tdma_id = IEEE80211_ELEMID_VENDOR, .tdma_len = sizeof(struct ieee80211_tdma_param) - 2, .tdma_oui = { TDMA_OUI_BYTES }, .tdma_type = TDMA_OUI_TYPE, .tdma_subtype = TDMA_SUBTYPE_PARAM, .tdma_version = TDMA_VERSION, }; const struct ieee80211_tdma_state *ts = vap->iv_tdma; uint16_t slotlen; KASSERT(vap->iv_caps & IEEE80211_C_TDMA, ("not a tdma vap, caps 0x%x", vap->iv_caps)); memcpy(frm, ¶m, sizeof(param)); frm += __offsetof(struct ieee80211_tdma_param, tdma_slot); *frm++ = ts->tdma_slot; *frm++ = ts->tdma_slotcnt; /* NB: convert units to fit in 16-bits */ slotlen = ts->tdma_slotlen / 100; /* 100us units */ ADDSHORT(frm, slotlen); *frm++ = ts->tdma_bintval; *frm++ = ts->tdma_inuse[0]; frm += 10; /* pad+timestamp */ return frm; #undef ADDSHORT } #undef TDMA_OUI_BYTES /* * Update TDMA state at TBTT. */ void ieee80211_tdma_update_beacon(struct ieee80211vap *vap, struct ieee80211_beacon_offsets *bo) { struct ieee80211_tdma_state *ts = vap->iv_tdma; KASSERT(vap->iv_caps & IEEE80211_C_TDMA, ("not a tdma vap, caps 0x%x", vap->iv_caps)); if (isset(bo->bo_flags, IEEE80211_BEACON_TDMA)) { (void) ieee80211_add_tdma(bo->bo_tdma, vap); clrbit(bo->bo_flags, IEEE80211_BEACON_TDMA); } if (ts->tdma_slot != 0) /* only on master */ return; if (ts->tdma_count <= 0) { /* * Time to update the mask of active/inuse stations. * We track stations that we've received a beacon * frame from and update this mask periodically. * This allows us to miss a few beacons before marking * a slot free for re-use. */ ts->tdma_inuse[0] = ts->tdma_active[0]; ts->tdma_active[0] = 0x01; /* update next time 'round */ /* XXX use notify framework */ setbit(bo->bo_flags, IEEE80211_BEACON_TDMA); /* NB: use s/w beacon miss threshold; may be too high */ ts->tdma_count = vap->iv_bmissthreshold-1; } else ts->tdma_count--; } static int tdma_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) { struct ieee80211_tdma_state *ts = vap->iv_tdma; if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) return ENOSYS; switch (ireq->i_type) { case IEEE80211_IOC_TDMA_SLOT: ireq->i_val = ts->tdma_slot; break; case IEEE80211_IOC_TDMA_SLOTCNT: ireq->i_val = ts->tdma_slotcnt; break; case IEEE80211_IOC_TDMA_SLOTLEN: ireq->i_val = ts->tdma_slotlen; break; case IEEE80211_IOC_TDMA_BINTERVAL: ireq->i_val = ts->tdma_bintval; break; default: return ENOSYS; } return 0; } IEEE80211_IOCTL_GET(tdma, tdma_ioctl_get80211); static int tdma_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) { struct ieee80211_tdma_state *ts = vap->iv_tdma; if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) return ENOSYS; switch (ireq->i_type) { case IEEE80211_IOC_TDMA_SLOT: if (!(0 <= ireq->i_val && ireq->i_val <= ts->tdma_slotcnt)) return EINVAL; if (ireq->i_val != ts->tdma_slot) { ts->tdma_slot = ireq->i_val; goto restart; } break; case IEEE80211_IOC_TDMA_SLOTCNT: if (!TDMA_SLOTCNT_VALID(ireq->i_val)) return EINVAL; if (ireq->i_val != ts->tdma_slotcnt) { ts->tdma_slotcnt = ireq->i_val; goto restart; } break; case IEEE80211_IOC_TDMA_SLOTLEN: /* * XXX * 150 insures at least 1/8 TU * 0xfffff is the max duration for bursting * (implict by way of 16-bit data type for i_val) */ if (!TDMA_SLOTLEN_VALID(ireq->i_val)) return EINVAL; if (ireq->i_val != ts->tdma_slotlen) { ts->tdma_slotlen = ireq->i_val; goto restart; } break; case IEEE80211_IOC_TDMA_BINTERVAL: if (!TDMA_BINTVAL_VALID(ireq->i_val)) return EINVAL; if (ireq->i_val != ts->tdma_bintval) { ts->tdma_bintval = ireq->i_val; goto restart; } break; default: return ENOSYS; } return 0; restart: ieee80211_beacon_notify(vap, IEEE80211_BEACON_TDMA); return ERESTART; } IEEE80211_IOCTL_SET(tdma, tdma_ioctl_set80211); #endif /* IEEE80211_SUPPORT_TDMA */ Index: head/sys/net80211/ieee80211_wds.c =================================================================== --- head/sys/net80211/ieee80211_wds.c (revision 298375) +++ head/sys/net80211/ieee80211_wds.c (revision 298376) @@ -1,790 +1,789 @@ /*- * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include #ifdef __FreeBSD__ __FBSDID("$FreeBSD$"); #endif /* * IEEE 802.11 WDS mode support. */ #include "opt_inet.h" #include "opt_wlan.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef IEEE80211_SUPPORT_SUPERG #include #endif static void wds_vattach(struct ieee80211vap *); static int wds_newstate(struct ieee80211vap *, enum ieee80211_state, int); static int wds_input(struct ieee80211_node *ni, struct mbuf *m, const struct ieee80211_rx_stats *rxs, int, int); static void wds_recv_mgmt(struct ieee80211_node *, struct mbuf *, int subtype, const struct ieee80211_rx_stats *, int, int); void ieee80211_wds_attach(struct ieee80211com *ic) { ic->ic_vattach[IEEE80211_M_WDS] = wds_vattach; } void ieee80211_wds_detach(struct ieee80211com *ic) { } static void wds_vdetach(struct ieee80211vap *vap) { if (vap->iv_bss != NULL) { /* XXX locking? */ if (vap->iv_bss->ni_wdsvap == vap) vap->iv_bss->ni_wdsvap = NULL; } } static void wds_vattach(struct ieee80211vap *vap) { vap->iv_newstate = wds_newstate; vap->iv_input = wds_input; vap->iv_recv_mgmt = wds_recv_mgmt; vap->iv_opdetach = wds_vdetach; } static void wds_flush(struct ieee80211_node *ni) { struct ieee80211com *ic = ni->ni_ic; struct mbuf *m, *next; int8_t rssi, nf; m = ieee80211_ageq_remove(&ic->ic_stageq, (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); if (m == NULL) return; IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_WDS, ni, "%s", "flush wds queue"); ic->ic_node_getsignal(ni, &rssi, &nf); for (; m != NULL; m = next) { next = m->m_nextpkt; m->m_nextpkt = NULL; ieee80211_input(ni, m, rssi, nf); } } static int ieee80211_create_wds(struct ieee80211vap *vap, struct ieee80211_channel *chan) { struct ieee80211com *ic = vap->iv_ic; struct ieee80211_node_table *nt = &ic->ic_sta; struct ieee80211_node *ni, *obss; IEEE80211_DPRINTF(vap, IEEE80211_MSG_WDS, "%s: creating link to %s on channel %u\n", __func__, ether_sprintf(vap->iv_des_bssid), ieee80211_chan2ieee(ic, chan)); /* NB: vap create must specify the bssid for the link */ KASSERT(vap->iv_flags & IEEE80211_F_DESBSSID, ("no bssid")); /* NB: we should only be called on RUN transition */ KASSERT(vap->iv_state == IEEE80211_S_RUN, ("!RUN state")); if ((vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0) { /* * Dynamic/non-legacy WDS. Reference the associated * station specified by the desired bssid setup at vap * create. Point ni_wdsvap at the WDS vap so 4-address * frames received through the associated AP vap will * be dispatched upward (e.g. to a bridge) as though * they arrived on the WDS vap. */ IEEE80211_NODE_LOCK(nt); obss = NULL; ni = ieee80211_find_node_locked(&ic->ic_sta, vap->iv_des_bssid); if (ni == NULL) { /* * Node went away before we could hookup. This * should be ok; no traffic will flow and a leave * event will be dispatched that should cause * the vap to be destroyed. */ IEEE80211_DPRINTF(vap, IEEE80211_MSG_WDS, "%s: station %s went away\n", __func__, ether_sprintf(vap->iv_des_bssid)); /* XXX stat? */ } else if (ni->ni_wdsvap != NULL) { /* * Node already setup with a WDS vap; we cannot * allow multiple references so disallow. If * ni_wdsvap points at us that's ok; we should * do nothing anyway. */ /* XXX printf instead? */ IEEE80211_DPRINTF(vap, IEEE80211_MSG_WDS, "%s: station %s in use with %s\n", __func__, ether_sprintf(vap->iv_des_bssid), ni->ni_wdsvap->iv_ifp->if_xname); /* XXX stat? */ } else { /* * Committed to new node, setup state. */ obss = vap->iv_bss; vap->iv_bss = ni; ni->ni_wdsvap = vap; } IEEE80211_NODE_UNLOCK(nt); if (obss != NULL) { /* NB: deferred to avoid recursive lock */ ieee80211_free_node(obss); } } else { /* * Legacy WDS vap setup. */ /* * The far end does not associate so we just create * create a new node and install it as the vap's * bss node. We must simulate an association and * authorize the port for traffic to flow. * XXX check if node already in sta table? */ ni = ieee80211_node_create_wds(vap, vap->iv_des_bssid, chan); if (ni != NULL) { obss = vap->iv_bss; vap->iv_bss = ieee80211_ref_node(ni); ni->ni_flags |= IEEE80211_NODE_AREF; if (obss != NULL) ieee80211_free_node(obss); /* give driver a chance to setup state like ni_txrate */ if (ic->ic_newassoc != NULL) ic->ic_newassoc(ni, 1); /* tell the authenticator about new station */ if (vap->iv_auth->ia_node_join != NULL) vap->iv_auth->ia_node_join(ni); if (ni->ni_authmode != IEEE80211_AUTH_8021X) ieee80211_node_authorize(ni); ieee80211_notify_node_join(ni, 1 /*newassoc*/); /* XXX inject l2uf frame */ } } /* * Flush any pending frames now that were setup. */ if (ni != NULL) wds_flush(ni); return (ni == NULL ? ENOENT : 0); } /* * Propagate multicast frames of an ap vap to all DWDS links. * The caller is assumed to have verified this frame is multicast. */ void ieee80211_dwds_mcast(struct ieee80211vap *vap0, struct mbuf *m) { struct ieee80211com *ic = vap0->iv_ic; const struct ether_header *eh = mtod(m, const struct ether_header *); struct ieee80211_node *ni; struct ieee80211vap *vap; struct ifnet *ifp; struct mbuf *mcopy; int err; KASSERT(ETHER_IS_MULTICAST(eh->ether_dhost), ("%s not mcast", ether_sprintf(eh->ether_dhost))); /* XXX locking */ TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { /* only DWDS vaps are interesting */ if (vap->iv_opmode != IEEE80211_M_WDS || (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY)) continue; /* if it came in this interface, don't send it back out */ ifp = vap->iv_ifp; if (ifp == m->m_pkthdr.rcvif) continue; /* * Duplicate the frame and send it. */ mcopy = m_copypacket(m, M_NOWAIT); if (mcopy == NULL) { if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); /* XXX stat + msg */ continue; } ni = ieee80211_find_txnode(vap, eh->ether_dhost); if (ni == NULL) { /* NB: ieee80211_find_txnode does stat+msg */ if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); m_freem(mcopy); continue; } /* calculate priority so drivers can find the tx queue */ if (ieee80211_classify(ni, mcopy)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_WDS, eh->ether_dhost, NULL, "%s", "classification failure"); vap->iv_stats.is_tx_classify++; if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); m_freem(mcopy); ieee80211_free_node(ni); continue; } BPF_MTAP(ifp, m); /* 802.3 tx */ /* * Encapsulate the packet in prep for transmission. */ IEEE80211_TX_LOCK(ic); mcopy = ieee80211_encap(vap, ni, mcopy); if (mcopy == NULL) { /* NB: stat+msg handled in ieee80211_encap */ IEEE80211_TX_UNLOCK(ic); ieee80211_free_node(ni); continue; } mcopy->m_flags |= M_MCAST; mcopy->m_pkthdr.rcvif = (void *) ni; err = ieee80211_parent_xmitpkt(ic, mcopy); IEEE80211_TX_UNLOCK(ic); if (!err) { if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1); if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len); } } } /* * Handle DWDS discovery on receipt of a 4-address frame in * ap mode. Queue the frame and post an event for someone * to plumb the necessary WDS vap for this station. Frames * received prior to the vap set running will then be reprocessed * as if they were just received. */ void ieee80211_dwds_discover(struct ieee80211_node *ni, struct mbuf *m) { struct ieee80211com *ic = ni->ni_ic; /* * Save the frame with an aging interval 4 times * the listen interval specified by the station. * Frames that sit around too long are reclaimed * using this information. * XXX handle overflow? * XXX per/vap beacon interval? */ m->m_pkthdr.rcvif = (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr); (void) ieee80211_ageq_append(&ic->ic_stageq, m, ((ni->ni_intval * ic->ic_lintval) << 2) / 1024); ieee80211_notify_wds_discover(ni); } /* * IEEE80211_M_WDS vap state machine handler. */ static int wds_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) { struct ieee80211com *ic = vap->iv_ic; struct ieee80211_node *ni; enum ieee80211_state ostate; int error; IEEE80211_LOCK_ASSERT(ic); ostate = vap->iv_state; IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s\n", __func__, ieee80211_state_name[ostate], ieee80211_state_name[nstate]); vap->iv_state = nstate; /* state transition */ callout_stop(&vap->iv_mgtsend); /* XXX callout_drain */ if (ostate != IEEE80211_S_SCAN) ieee80211_cancel_scan(vap); /* background scan */ ni = vap->iv_bss; /* NB: no reference held */ error = 0; switch (nstate) { case IEEE80211_S_INIT: switch (ostate) { case IEEE80211_S_SCAN: ieee80211_cancel_scan(vap); break; default: break; } if (ostate != IEEE80211_S_INIT) { /* NB: optimize INIT -> INIT case */ ieee80211_reset_bss(vap); } break; case IEEE80211_S_SCAN: switch (ostate) { case IEEE80211_S_INIT: ieee80211_check_scan_current(vap); break; default: break; } break; case IEEE80211_S_RUN: if (ostate == IEEE80211_S_INIT) { /* * Already have a channel; bypass the scan * and startup immediately. */ error = ieee80211_create_wds(vap, ic->ic_curchan); } break; default: break; } return error; } /* * Process a received frame. The node associated with the sender * should be supplied. If nothing was found in the node table then * the caller is assumed to supply a reference to iv_bss instead. * The RSSI and a timestamp are also supplied. The RSSI data is used * during AP scanning to select a AP to associate with; it can have * any units so long as values have consistent units and higher values * mean ``better signal''. The receive timestamp is currently not used * by the 802.11 layer. */ static int wds_input(struct ieee80211_node *ni, struct mbuf *m, const struct ieee80211_rx_stats *rxs, int rssi, int nf) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; struct ifnet *ifp = vap->iv_ifp; struct ieee80211_frame *wh; struct ieee80211_key *key; struct ether_header *eh; int hdrspace, need_tap = 1; /* mbuf need to be tapped. */ uint8_t dir, type, subtype, qos; if (m->m_flags & M_AMPDU_MPDU) { /* * Fastpath for A-MPDU reorder q resubmission. Frames * w/ M_AMPDU_MPDU marked have already passed through * here but were received out of order and been held on * the reorder queue. When resubmitted they are marked * with the M_AMPDU_MPDU flag and we can bypass most of * the normal processing. */ wh = mtod(m, struct ieee80211_frame *); type = IEEE80211_FC0_TYPE_DATA; dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; subtype = IEEE80211_FC0_SUBTYPE_QOS; hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ goto resubmit_ampdu; } KASSERT(ni != NULL, ("null node")); type = -1; /* undefined */ if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, "too short (1): len %u", m->m_pkthdr.len); vap->iv_stats.is_rx_tooshort++; goto out; } /* * Bit of a cheat here, we use a pointer for a 3-address * frame format but don't reference fields past outside * ieee80211_frame_min w/o first validating the data is * present. */ wh = mtod(m, struct ieee80211_frame *); if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) ni->ni_inact = ni->ni_inact_reload; if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != IEEE80211_FC0_VERSION_0) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x", wh->i_fc[0], wh->i_fc[1]); vap->iv_stats.is_rx_badversion++; goto err; } dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; /* NB: WDS vap's do not scan */ if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_addr4)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, "too short (3): len %u", m->m_pkthdr.len); vap->iv_stats.is_rx_tooshort++; goto out; } /* NB: the TA is implicitly verified by finding the wds peer node */ if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr) && !IEEE80211_ADDR_EQ(wh->i_addr1, ifp->if_broadcastaddr)) { /* not interested in */ IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr1, NULL, "%s", "not to bss"); vap->iv_stats.is_rx_wrongbss++; goto out; } IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); ni->ni_noise = nf; if (IEEE80211_HAS_SEQ(type, subtype)) { uint8_t tid = ieee80211_gettid(wh); if (IEEE80211_QOS_HAS_SEQ(wh) && TID_TO_WME_AC(tid) >= WME_AC_VI) ic->ic_wme.wme_hipri_traffic++; if (! ieee80211_check_rxseq(ni, wh, wh->i_addr1)) goto out; } switch (type) { case IEEE80211_FC0_TYPE_DATA: hdrspace = ieee80211_hdrspace(ic, wh); if (m->m_len < hdrspace && (m = m_pullup(m, hdrspace)) == NULL) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, "data too short: expecting %u", hdrspace); vap->iv_stats.is_rx_tooshort++; goto out; /* XXX */ } if (dir != IEEE80211_FC1_DIR_DSTODS) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "data", "incorrect dir 0x%x", dir); vap->iv_stats.is_rx_wrongdir++; goto out; } /* * Only legacy WDS traffic should take this path. */ if ((vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "data", "%s", "not legacy wds"); vap->iv_stats.is_rx_wrongdir++;/*XXX*/ goto out; } /* * Handle A-MPDU re-ordering. If the frame is to be * processed directly then ieee80211_ampdu_reorder * will return 0; otherwise it has consumed the mbuf * and we should do nothing more with it. */ if ((m->m_flags & M_AMPDU) && ieee80211_ampdu_reorder(ni, m) != 0) { m = NULL; goto out; } resubmit_ampdu: /* * Handle privacy requirements. Note that we * must not be preempted from here until after * we (potentially) call ieee80211_crypto_demic; * otherwise we may violate assumptions in the * crypto cipher modules used to do delayed update * of replay sequence numbers. */ if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { /* * Discard encrypted frames when privacy is off. */ IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "WEP", "%s", "PRIVACY off"); vap->iv_stats.is_rx_noprivacy++; IEEE80211_NODE_STAT(ni, rx_noprivacy); goto out; } key = ieee80211_crypto_decap(ni, m, hdrspace); if (key == NULL) { /* NB: stats+msgs handled in crypto_decap */ IEEE80211_NODE_STAT(ni, rx_wepfail); goto out; } wh = mtod(m, struct ieee80211_frame *); wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; } else { /* XXX M_WEP and IEEE80211_F_PRIVACY */ key = NULL; } /* * Save QoS bits for use below--before we strip the header. */ if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : ((struct ieee80211_qosframe *)wh)->i_qos[0]; } else qos = 0; /* * Next up, any fragmentation. */ if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { m = ieee80211_defrag(ni, m, hdrspace); if (m == NULL) { /* Fragment dropped or frame not complete yet */ goto out; } } wh = NULL; /* no longer valid, catch any uses */ /* * Next strip any MSDU crypto bits. */ if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, ni->ni_macaddr, "data", "%s", "demic error"); vap->iv_stats.is_rx_demicfail++; IEEE80211_NODE_STAT(ni, rx_demicfail); goto out; } /* copy to listener after decrypt */ if (ieee80211_radiotap_active_vap(vap)) ieee80211_radiotap_rx(vap, m); need_tap = 0; /* * Finally, strip the 802.11 header. */ m = ieee80211_decap(vap, m, hdrspace); if (m == NULL) { /* XXX mask bit to check for both */ /* don't count Null data frames as errors */ if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) goto out; IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, ni->ni_macaddr, "data", "%s", "decap error"); vap->iv_stats.is_rx_decap++; IEEE80211_NODE_STAT(ni, rx_decap); goto err; } eh = mtod(m, struct ether_header *); if (!ieee80211_node_is_authorized(ni)) { /* * Deny any non-PAE frames received prior to * authorization. For open/shared-key * authentication the port is mark authorized * after authentication completes. For 802.1x * the port is not marked authorized by the * authenticator until the handshake has completed. */ if (eh->ether_type != htons(ETHERTYPE_PAE)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, eh->ether_shost, "data", "unauthorized port: ether type 0x%x len %u", eh->ether_type, m->m_pkthdr.len); vap->iv_stats.is_rx_unauth++; IEEE80211_NODE_STAT(ni, rx_unauth); goto err; } } else { /* * When denying unencrypted frames, discard * any non-PAE frames received without encryption. */ if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && (key == NULL && (m->m_flags & M_WEP) == 0) && eh->ether_type != htons(ETHERTYPE_PAE)) { /* * Drop unencrypted frames. */ vap->iv_stats.is_rx_unencrypted++; IEEE80211_NODE_STAT(ni, rx_unencrypted); goto out; } } /* XXX require HT? */ if (qos & IEEE80211_QOS_AMSDU) { m = ieee80211_decap_amsdu(ni, m); if (m == NULL) return IEEE80211_FC0_TYPE_DATA; } else { #ifdef IEEE80211_SUPPORT_SUPERG m = ieee80211_decap_fastframe(vap, ni, m); if (m == NULL) return IEEE80211_FC0_TYPE_DATA; #endif } ieee80211_deliver_data(vap, ni, m); return IEEE80211_FC0_TYPE_DATA; case IEEE80211_FC0_TYPE_MGT: vap->iv_stats.is_rx_mgmt++; IEEE80211_NODE_STAT(ni, rx_mgmt); if (dir != IEEE80211_FC1_DIR_NODS) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "data", "incorrect dir 0x%x", dir); vap->iv_stats.is_rx_wrongdir++; goto err; } if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, "mgt", "too short: len %u", m->m_pkthdr.len); vap->iv_stats.is_rx_tooshort++; goto out; } #ifdef IEEE80211_DEBUG if (ieee80211_msg_debug(vap) || ieee80211_msg_dumppkts(vap)) { if_printf(ifp, "received %s from %s rssi %d\n", - ieee80211_mgt_subtype_name[subtype >> - IEEE80211_FC0_SUBTYPE_SHIFT], + ieee80211_mgt_subtype_name(subtype), ether_sprintf(wh->i_addr2), rssi); } #endif if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "WEP set but not permitted"); vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ goto out; } vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); goto out; case IEEE80211_FC0_TYPE_CTL: vap->iv_stats.is_rx_ctl++; IEEE80211_NODE_STAT(ni, rx_ctrl); goto out; default: IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, wh, "bad", "frame type 0x%x", type); /* should not come here */ break; } err: if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); out: if (m != NULL) { if (need_tap && ieee80211_radiotap_active_vap(vap)) ieee80211_radiotap_rx(vap, m); m_freem(m); } return type; } static void wds_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, const struct ieee80211_rx_stats *rxs, int rssi, int nf) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; struct ieee80211_frame *wh; u_int8_t *frm, *efrm; wh = mtod(m0, struct ieee80211_frame *); frm = (u_int8_t *)&wh[1]; efrm = mtod(m0, u_int8_t *) + m0->m_len; switch (subtype) { case IEEE80211_FC0_SUBTYPE_ACTION: case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: if (ni == vap->iv_bss) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "unknown node"); vap->iv_stats.is_rx_mgtdiscard++; } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1)) { /* NB: not interested in multicast frames. */ IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "not for us"); vap->iv_stats.is_rx_mgtdiscard++; } else if (vap->iv_state != IEEE80211_S_RUN) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "wrong state %s", ieee80211_state_name[vap->iv_state]); vap->iv_stats.is_rx_mgtdiscard++; } else { if (ieee80211_parse_action(ni, m0) == 0) (void)ic->ic_recv_action(ni, wh, frm, efrm); } break; case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: case IEEE80211_FC0_SUBTYPE_PROBE_REQ: case IEEE80211_FC0_SUBTYPE_PROBE_RESP: case IEEE80211_FC0_SUBTYPE_TIMING_ADV: case IEEE80211_FC0_SUBTYPE_BEACON: case IEEE80211_FC0_SUBTYPE_ATIM: case IEEE80211_FC0_SUBTYPE_DISASSOC: case IEEE80211_FC0_SUBTYPE_AUTH: case IEEE80211_FC0_SUBTYPE_DEAUTH: IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "not handled"); vap->iv_stats.is_rx_mgtdiscard++; break; default: IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, wh, "mgt", "subtype 0x%x not handled", subtype); vap->iv_stats.is_rx_badsubtype++; break; } }