diff --git a/sys/net80211/ieee80211_adhoc.c b/sys/net80211/ieee80211_adhoc.c index e0a5bdf56cdc..32de8cc95089 100644 --- a/sys/net80211/ieee80211_adhoc.c +++ b/sys/net80211/ieee80211_adhoc.c @@ -1,875 +1,871 @@ /*- * 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 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 #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 *, int rssi, int noise, uint32_t rstamp); static void adhoc_recv_mgmt(struct ieee80211_node *, struct mbuf *, int subtype, int rssi, int noise, uint32_t rstamp); 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; vap->iv_recv_mgmt = adhoc_recv_mgmt; vap->iv_opdetach = adhoc_vdetach; } /* * IEEE80211_M_IBSS+IEEE80211_M_AHDEMO vap state machine handler. */ static int adhoc_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) { #ifdef IEEE80211_DEBUG struct ieee80211com *ic = vap->iv_ic; #endif 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_INIT: case IEEE80211_S_RUN: /* beacon miss */ 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, 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: /* * 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; 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); break; case IEEE80211_S_SLEEP: ieee80211_sta_pwrsave(vap, 0); break; default: invalid: IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, "%s: invalid 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, int rssi, int noise, uint32_t rstamp) { #define SEQ_LEQ(a,b) ((int)((a)-(b)) <= 0) #define HAS_SEQ(type) ((type & 0x4) == 0) 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; uint8_t dir, type, subtype, qos; uint8_t *bssid; uint16_t rxseq; - if (m->m_flags & M_AMPDU) { + if (m->m_flags & M_AMPDU_MPDU) { /* * Fastpath for A-MPDU reorder q resubmission. Frames - * w/ M_AMPDU 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 flag and we can bypass most of the - * normal processing. + * 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; need_tap = 1; /* mbuf need to be tapped. */ 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 %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) { 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)) { /* * 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 = noise; ni->ni_rstamp = rstamp; 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++; rxseq = le16toh(*(uint16_t *)wh->i_seq); if ((ni->ni_flags & IEEE80211_NODE_HT) == 0 && (wh->i_fc[1] & IEEE80211_FC1_RETRY) && SEQ_LEQ(rxseq, ni->ni_rxseqs[tid])) { /* duplicate, discard */ IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, bssid, "duplicate", "seqno <%u,%u> fragno <%u,%u> tid %u", rxseq >> IEEE80211_SEQ_SEQ_SHIFT, ni->ni_rxseqs[tid] >> IEEE80211_SEQ_SEQ_SHIFT, rxseq & IEEE80211_SEQ_FRAG_MASK, ni->ni_rxseqs[tid] & IEEE80211_SEQ_FRAG_MASK, tid); vap->iv_stats.is_rx_dup++; IEEE80211_NODE_STAT(ni, rx_dup); goto out; } ni->ni_rxseqs[tid] = rxseq; } } 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. The station must be - * associated and negotiated HT. The frame must be - * a QoS frame (not QoS null data) and not previously - * processed for A-MPDU re-ordering. If the frame is - * to be processed directly then ieee80211_ampdu_reorder + * 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 ((ni->ni_flags & IEEE80211_NODE_HT) && - subtype == IEEE80211_FC0_SUBTYPE_QOS && + 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_WEP) { 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_WEP; } 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 (bpf_peers_present(vap->iv_rawbpf)) bpf_mtap(vap->iv_rawbpf, 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 if ((ni->ni_ath_flags & IEEE80211_NODE_FF) && #define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc)) m->m_pkthdr.len >= 3*FF_LLC_SIZE) { struct llc *llc; /* * Check for fast-frame tunnel encapsulation. */ if (m->m_len < FF_LLC_SIZE && (m = m_pullup(m, FF_LLC_SIZE)) == NULL) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, "fast-frame", "%s", "m_pullup(llc) failed"); vap->iv_stats.is_rx_tooshort++; return IEEE80211_FC0_TYPE_DATA; } llc = (struct llc *)(mtod(m, uint8_t *) + sizeof(struct ether_header)); if (llc->llc_snap.ether_type == htons(ATH_FF_ETH_TYPE)) { m_adj(m, FF_LLC_SIZE); m = ieee80211_decap_fastframe(ni, m); if (m == NULL) return IEEE80211_FC0_TYPE_DATA; } } #undef FF_LLC_SIZE 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], ether_sprintf(wh->i_addr2), rssi); } #endif if (wh->i_fc[1] & IEEE80211_FC1_WEP) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "WEP set but not permitted"); vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ goto out; } if (bpf_peers_present(vap->iv_rawbpf)) bpf_mtap(vap->iv_rawbpf, m); /* NB: only IBSS mode gets mgt frames */ if (vap->iv_opmode == IEEE80211_M_IBSS) vap->iv_recv_mgmt(ni, m, subtype, rssi, noise, rstamp); m_freem(m); return IEEE80211_FC0_TYPE_MGT; 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: ifp->if_ierrors++; out: if (m != NULL) { if (bpf_peers_present(vap->iv_rawbpf) && need_tap) bpf_mtap(vap->iv_rawbpf, m); m_freem(m); } return type; #undef SEQ_LEQ } 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; 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; /* * We process beacon/probe response * frames to discover neighbors. */ if (ieee80211_parse_beacon(ni, m0, &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, &scan, wh, subtype, rssi, noise, rstamp); 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)); } if (ni != NULL) { IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); ni->ni_noise = noise; ni->ni_rstamp = rstamp; } } break; } case IEEE80211_FC0_SUBTYPE_PROBE_REQ: if (vap->iv_state != IEEE80211_S_RUN) { vap->iv_stats.is_rx_mgtdiscard++; return; } if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { /* frame must be directed */ 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: { const struct ieee80211_action *ia; if (vap->iv_state != IEEE80211_S_RUN) { vap->iv_stats.is_rx_mgtdiscard++; return; } /* * action frame format: * [1] category * [1] action * [tlv] parameters */ IEEE80211_VERIFY_LENGTH(efrm - frm, sizeof(struct ieee80211_action), return); ia = (const struct ieee80211_action *) frm; vap->iv_stats.is_rx_action++; IEEE80211_NODE_STAT(ni, rx_action); /* verify frame payloads but defer processing */ /* XXX maybe push this to method */ 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); break; case IEEE80211_ACTION_BA_ADDBA_RESPONSE: IEEE80211_VERIFY_LENGTH(efrm - frm, sizeof(struct ieee80211_action_ba_addbaresponse), return); break; case IEEE80211_ACTION_BA_DELBA: IEEE80211_VERIFY_LENGTH(efrm - frm, sizeof(struct ieee80211_action_ba_delba), return); 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); break; } break; } ic->ic_recv_action(ni, frm, efrm); break; } case IEEE80211_FC0_SUBTYPE_AUTH: case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: case IEEE80211_FC0_SUBTYPE_DEAUTH: case IEEE80211_FC0_SUBTYPE_DISASSOC: vap->iv_stats.is_rx_mgtdiscard++; return; 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 diff --git a/sys/net80211/ieee80211_freebsd.h b/sys/net80211/ieee80211_freebsd.h index fcd1b3fa8b8c..448bd787e3f5 100644 --- a/sys/net80211/ieee80211_freebsd.h +++ b/sys/net80211/ieee80211_freebsd.h @@ -1,545 +1,549 @@ /*- * Copyright (c) 2003-2008 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. * * $FreeBSD$ */ #ifndef _NET80211_IEEE80211_FREEBSD_H_ #define _NET80211_IEEE80211_FREEBSD_H_ #ifdef _KERNEL #include #include #include #include /* * Common state locking definitions. */ typedef struct { char name[16]; /* e.g. "ath0_com_lock" */ struct mtx mtx; } ieee80211_com_lock_t; #define IEEE80211_LOCK_INIT(_ic, _name) do { \ ieee80211_com_lock_t *cl = &(_ic)->ic_comlock; \ snprintf(cl->name, sizeof(cl->name), "%s_com_lock", _name); \ mtx_init(&cl->mtx, cl->name, NULL, MTX_DEF | MTX_RECURSE); \ } while (0) #define IEEE80211_LOCK_OBJ(_ic) (&(_ic)->ic_comlock.mtx) #define IEEE80211_LOCK_DESTROY(_ic) mtx_destroy(IEEE80211_LOCK_OBJ(_ic)) #define IEEE80211_LOCK(_ic) mtx_lock(IEEE80211_LOCK_OBJ(_ic)) #define IEEE80211_UNLOCK(_ic) mtx_unlock(IEEE80211_LOCK_OBJ(_ic)) #define IEEE80211_LOCK_ASSERT(_ic) \ mtx_assert(IEEE80211_LOCK_OBJ(_ic), MA_OWNED) /* * Node locking definitions. */ typedef struct { char name[16]; /* e.g. "ath0_node_lock" */ struct mtx mtx; } ieee80211_node_lock_t; #define IEEE80211_NODE_LOCK_INIT(_nt, _name) do { \ ieee80211_node_lock_t *nl = &(_nt)->nt_nodelock; \ snprintf(nl->name, sizeof(nl->name), "%s_node_lock", _name); \ mtx_init(&nl->mtx, nl->name, NULL, MTX_DEF | MTX_RECURSE); \ } while (0) #define IEEE80211_NODE_LOCK_OBJ(_nt) (&(_nt)->nt_nodelock.mtx) #define IEEE80211_NODE_LOCK_DESTROY(_nt) \ mtx_destroy(IEEE80211_NODE_LOCK_OBJ(_nt)) #define IEEE80211_NODE_LOCK(_nt) \ mtx_lock(IEEE80211_NODE_LOCK_OBJ(_nt)) #define IEEE80211_NODE_IS_LOCKED(_nt) \ mtx_owned(IEEE80211_NODE_LOCK_OBJ(_nt)) #define IEEE80211_NODE_UNLOCK(_nt) \ mtx_unlock(IEEE80211_NODE_LOCK_OBJ(_nt)) #define IEEE80211_NODE_LOCK_ASSERT(_nt) \ mtx_assert(IEEE80211_NODE_LOCK_OBJ(_nt), MA_OWNED) /* * Node table iteration locking definitions; this protects the * scan generation # used to iterate over the station table * while grabbing+releasing the node lock. */ typedef struct { char name[16]; /* e.g. "ath0_scan_lock" */ struct mtx mtx; } ieee80211_scan_lock_t; #define IEEE80211_NODE_ITERATE_LOCK_INIT(_nt, _name) do { \ ieee80211_scan_lock_t *sl = &(_nt)->nt_scanlock; \ snprintf(sl->name, sizeof(sl->name), "%s_scan_lock", _name); \ mtx_init(&sl->mtx, sl->name, NULL, MTX_DEF); \ } while (0) #define IEEE80211_NODE_ITERATE_LOCK_OBJ(_nt) (&(_nt)->nt_scanlock.mtx) #define IEEE80211_NODE_ITERATE_LOCK_DESTROY(_nt) \ mtx_destroy(IEEE80211_NODE_ITERATE_LOCK_OBJ(_nt)) #define IEEE80211_NODE_ITERATE_LOCK(_nt) \ mtx_lock(IEEE80211_NODE_ITERATE_LOCK_OBJ(_nt)) #define IEEE80211_NODE_ITERATE_UNLOCK(_nt) \ mtx_unlock(IEEE80211_NODE_ITERATE_LOCK_OBJ(_nt)) #define _AGEQ_ENQUEUE(_ifq, _m, _qlen, _age) do { \ (_m)->m_nextpkt = NULL; \ if ((_ifq)->ifq_tail != NULL) { \ _age -= M_AGE_GET((_ifq)->ifq_head); \ (_ifq)->ifq_tail->m_nextpkt = (_m); \ } else { \ (_ifq)->ifq_head = (_m); \ } \ M_AGE_SET(_m, _age); \ (_ifq)->ifq_tail = (_m); \ (_qlen) = ++(_ifq)->ifq_len; \ } while (0) /* * Per-node power-save queue definitions. */ #define IEEE80211_NODE_SAVEQ_INIT(_ni, _name) do { \ mtx_init(&(_ni)->ni_savedq.ifq_mtx, _name, "802.11 ps queue", MTX_DEF);\ (_ni)->ni_savedq.ifq_maxlen = IEEE80211_PS_MAX_QUEUE; \ } while (0) #define IEEE80211_NODE_SAVEQ_DESTROY(_ni) \ mtx_destroy(&(_ni)->ni_savedq.ifq_mtx) #define IEEE80211_NODE_SAVEQ_QLEN(_ni) \ _IF_QLEN(&(_ni)->ni_savedq) #define IEEE80211_NODE_SAVEQ_LOCK(_ni) do { \ IF_LOCK(&(_ni)->ni_savedq); \ } while (0) #define IEEE80211_NODE_SAVEQ_UNLOCK(_ni) do { \ IF_UNLOCK(&(_ni)->ni_savedq); \ } while (0) #define IEEE80211_NODE_SAVEQ_DEQUEUE(_ni, _m, _qlen) do { \ IEEE80211_NODE_SAVEQ_LOCK(_ni); \ _IF_DEQUEUE(&(_ni)->ni_savedq, _m); \ (_qlen) = IEEE80211_NODE_SAVEQ_QLEN(_ni); \ IEEE80211_NODE_SAVEQ_UNLOCK(_ni); \ } while (0) #define IEEE80211_NODE_SAVEQ_DRAIN(_ni, _qlen) do { \ IEEE80211_NODE_SAVEQ_LOCK(_ni); \ (_qlen) = IEEE80211_NODE_SAVEQ_QLEN(_ni); \ _IF_DRAIN(&(_ni)->ni_savedq); \ IEEE80211_NODE_SAVEQ_UNLOCK(_ni); \ } while (0) /* XXX could be optimized */ #define _IEEE80211_NODE_SAVEQ_DEQUEUE_HEAD(_ni, _m) do { \ _IF_DEQUEUE(&(_ni)->ni_savedq, m); \ } while (0) #define _IEEE80211_NODE_SAVEQ_ENQUEUE(_ni, _m, _qlen, _age) do {\ _AGEQ_ENQUEUE(&ni->ni_savedq, _m, _qlen, _age); \ } while (0) #ifndef IF_PREPEND_LIST #define _IF_PREPEND_LIST(ifq, mhead, mtail, mcount) do { \ (mtail)->m_nextpkt = (ifq)->ifq_head; \ if ((ifq)->ifq_tail == NULL) \ (ifq)->ifq_tail = (mtail); \ (ifq)->ifq_head = (mhead); \ (ifq)->ifq_len += (mcount); \ } while (0) #define IF_PREPEND_LIST(ifq, mhead, mtail, mcount) do { \ IF_LOCK(ifq); \ _IF_PREPEND_LIST(ifq, mhead, mtail, mcount); \ IF_UNLOCK(ifq); \ } while (0) #endif /* IF_PREPEND_LIST */ /* XXX temporary */ #define IEEE80211_NODE_WDSQ_INIT(_ni, _name) do { \ mtx_init(&(_ni)->ni_wdsq.ifq_mtx, _name, "802.11 wds queue", MTX_DEF);\ (_ni)->ni_wdsq.ifq_maxlen = IEEE80211_PS_MAX_QUEUE; \ } while (0) #define IEEE80211_NODE_WDSQ_DESTROY(_ni) do { \ mtx_destroy(&(_ni)->ni_wdsq.ifq_mtx); \ } while (0) #define IEEE80211_NODE_WDSQ_QLEN(_ni) _IF_QLEN(&(_ni)->ni_wdsq) #define IEEE80211_NODE_WDSQ_LOCK(_ni) IF_LOCK(&(_ni)->ni_wdsq) #define IEEE80211_NODE_WDSQ_UNLOCK(_ni) IF_UNLOCK(&(_ni)->ni_wdsq) #define _IEEE80211_NODE_WDSQ_DEQUEUE_HEAD(_ni, _m) do { \ _IF_DEQUEUE(&(_ni)->ni_wdsq, m); \ } while (0) #define _IEEE80211_NODE_WDSQ_ENQUEUE(_ni, _m, _qlen, _age) do { \ _AGEQ_ENQUEUE(&ni->ni_wdsq, _m, _qlen, _age); \ } while (0) /* * 802.1x MAC ACL database locking definitions. */ typedef struct mtx acl_lock_t; #define ACL_LOCK_INIT(_as, _name) \ mtx_init(&(_as)->as_lock, _name, "802.11 ACL", MTX_DEF) #define ACL_LOCK_DESTROY(_as) mtx_destroy(&(_as)->as_lock) #define ACL_LOCK(_as) mtx_lock(&(_as)->as_lock) #define ACL_UNLOCK(_as) mtx_unlock(&(_as)->as_lock) #define ACL_LOCK_ASSERT(_as) \ mtx_assert((&(_as)->as_lock), MA_OWNED) /* * Node reference counting definitions. * * ieee80211_node_initref initialize the reference count to 1 * ieee80211_node_incref add a reference * ieee80211_node_decref remove a reference * ieee80211_node_dectestref remove a reference and return 1 if this * is the last reference, otherwise 0 * ieee80211_node_refcnt reference count for printing (only) */ #include #define ieee80211_node_initref(_ni) \ do { ((_ni)->ni_refcnt = 1); } while (0) #define ieee80211_node_incref(_ni) \ atomic_add_int(&(_ni)->ni_refcnt, 1) #define ieee80211_node_decref(_ni) \ atomic_subtract_int(&(_ni)->ni_refcnt, 1) struct ieee80211_node; int ieee80211_node_dectestref(struct ieee80211_node *ni); #define ieee80211_node_refcnt(_ni) (_ni)->ni_refcnt struct ifqueue; struct ieee80211vap; void ieee80211_drain_ifq(struct ifqueue *); void ieee80211_flush_ifq(struct ifqueue *, struct ieee80211vap *); void ieee80211_vap_destroy(struct ieee80211vap *); #define IFNET_IS_UP_RUNNING(_ifp) \ (((_ifp)->if_flags & IFF_UP) && \ ((_ifp)->if_drv_flags & IFF_DRV_RUNNING)) #define msecs_to_ticks(ms) (((ms)*hz)/1000) #define ticks_to_msecs(t) (1000*(t) / hz) #define ticks_to_secs(t) ((t) / hz) #define time_after(a,b) ((long)(b) - (long)(a) < 0) #define time_before(a,b) time_after(b,a) #define time_after_eq(a,b) ((long)(a) - (long)(b) >= 0) #define time_before_eq(a,b) time_after_eq(b,a) #define memmove(dst, src, n) ovbcopy(src, dst, n) struct mbuf *ieee80211_getmgtframe(uint8_t **frm, int headroom, int pktlen); /* tx path usage */ #define M_LINK0 M_PROTO1 /* WEP requested */ #define M_WDS M_PROTO2 /* WDS frame */ #define M_EAPOL M_PROTO3 /* PAE/EAPOL frame */ #define M_PWR_SAV M_PROTO4 /* bypass PS handling */ #define M_MORE_DATA M_PROTO5 /* more data frames to follow */ #define M_FF M_PROTO6 /* fast frame */ #define M_TXCB M_PROTO7 /* do tx complete callback */ +#define M_AMPDU_MPDU M_PROTO8 /* ok for A-MPDU aggregation */ #define M_80211_TX \ - (M_LINK0|M_WDS|M_EAPOL|M_PWR_SAV|M_MORE_DATA|M_FF|M_TXCB) + (M_LINK0|M_WDS|M_EAPOL|M_PWR_SAV|M_MORE_DATA|M_FF|M_TXCB|M_AMPDU_MPDU) /* rx path usage */ -#define M_AMPDU M_PROTO1 /* A-MPDU processing done */ +#define M_AMPDU M_PROTO1 /* A-MPDU subframe */ #define M_WEP M_PROTO2 /* WEP done by hardware */ -#define M_80211_RX (M_AMPDU|M_WEP) +#if 0 +#define M_AMPDU_MPDU M_PROTO8 /* A-MPDU re-order done */ +#endif +#define M_80211_RX (M_AMPDU|M_WEP|M_AMPDU_MPDU) /* * Store WME access control bits in the vlan tag. * This is safe since it's done after the packet is classified * (where we use any previous tag) and because it's passed * directly in to the driver and there's no chance someone * else will clobber them on us. */ #define M_WME_SETAC(m, ac) \ ((m)->m_pkthdr.ether_vtag = (ac)) #define M_WME_GETAC(m) ((m)->m_pkthdr.ether_vtag) /* * Mbufs on the power save queue are tagged with an age and * timed out. We reuse the hardware checksum field in the * mbuf packet header to store this data. */ #define M_AGE_SET(m,v) (m->m_pkthdr.csum_data = v) #define M_AGE_GET(m) (m->m_pkthdr.csum_data) #define M_AGE_SUB(m,adj) (m->m_pkthdr.csum_data -= adj) #define MTAG_ABI_NET80211 1132948340 /* net80211 ABI */ struct ieee80211_cb { void (*func)(struct ieee80211_node *, void *, int status); void *arg; }; #define NET80211_TAG_CALLBACK 0 /* xmit complete callback */ int ieee80211_add_callback(struct mbuf *m, void (*func)(struct ieee80211_node *, void *, int), void *arg); void ieee80211_process_callback(struct ieee80211_node *, struct mbuf *, int); void get_random_bytes(void *, size_t); struct ieee80211com; void ieee80211_sysctl_attach(struct ieee80211com *); void ieee80211_sysctl_detach(struct ieee80211com *); void ieee80211_sysctl_vattach(struct ieee80211vap *); void ieee80211_sysctl_vdetach(struct ieee80211vap *); void ieee80211_load_module(const char *); /* * A "policy module" is an adjunct module to net80211 that provides * functionality that typically includes policy decisions. This * modularity enables extensibility and vendor-supplied functionality. */ #define _IEEE80211_POLICY_MODULE(policy, name, version) \ typedef void (*policy##_setup)(int); \ SET_DECLARE(policy##_set, policy##_setup); \ static int \ wlan_##name##_modevent(module_t mod, int type, void *unused) \ { \ policy##_setup * const *iter, f; \ switch (type) { \ case MOD_LOAD: \ SET_FOREACH(iter, policy##_set) { \ f = (void*) *iter; \ f(type); \ } \ return 0; \ case MOD_UNLOAD: \ case MOD_QUIESCE: \ if (nrefs) { \ printf("wlan_##name: still in use (%u dynamic refs)\n",\ nrefs); \ return EBUSY; \ } \ if (type == MOD_UNLOAD) { \ SET_FOREACH(iter, policy##_set) { \ f = (void*) *iter; \ f(type); \ } \ } \ return 0; \ } \ return EINVAL; \ } \ static moduledata_t name##_mod = { \ "wlan_" #name, \ wlan_##name##_modevent, \ 0 \ }; \ DECLARE_MODULE(wlan_##name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);\ MODULE_VERSION(wlan_##name, version); \ MODULE_DEPEND(wlan_##name, wlan, 1, 1, 1) /* * Crypto modules implement cipher support. */ #define IEEE80211_CRYPTO_MODULE(name, version) \ _IEEE80211_POLICY_MODULE(crypto, name, version); \ static void \ name##_modevent(int type) \ { \ if (type == MOD_LOAD) \ ieee80211_crypto_register(&name); \ else \ ieee80211_crypto_unregister(&name); \ } \ TEXT_SET(crypto##_set, name##_modevent) /* * Scanner modules provide scanning policy. */ #define IEEE80211_SCANNER_MODULE(name, version) \ _IEEE80211_POLICY_MODULE(scanner, name, version) #define IEEE80211_SCANNER_ALG(name, alg, v) \ static void \ name##_modevent(int type) \ { \ if (type == MOD_LOAD) \ ieee80211_scanner_register(alg, &v); \ else \ ieee80211_scanner_unregister(alg, &v); \ } \ TEXT_SET(scanner_set, name##_modevent); \ /* * ACL modules implement acl policy. */ #define IEEE80211_ACL_MODULE(name, alg, version) \ _IEEE80211_POLICY_MODULE(acl, name, version); \ static void \ alg##_modevent(int type) \ { \ if (type == MOD_LOAD) \ ieee80211_aclator_register(&alg); \ else \ ieee80211_aclator_unregister(&alg); \ } \ TEXT_SET(acl_set, alg##_modevent); \ /* * Authenticator modules handle 802.1x/WPA authentication. */ #define IEEE80211_AUTH_MODULE(name, version) \ _IEEE80211_POLICY_MODULE(auth, name, version) #define IEEE80211_AUTH_ALG(name, alg, v) \ static void \ name##_modevent(int type) \ { \ if (type == MOD_LOAD) \ ieee80211_authenticator_register(alg, &v); \ else \ ieee80211_authenticator_unregister(alg); \ } \ TEXT_SET(auth_set, name##_modevent) /* * Rate control modules provide tx rate control support. */ #define IEEE80211_RATE_MODULE(alg, version) \ _IEEE80211_POLICY_MODULE(rate, alg, version); \ static void \ alg##_modevent(int type) \ { \ /* XXX nothing to do until the rate control framework arrives */\ } \ TEXT_SET(rate##_set, alg##_modevent) #endif /* _KERNEL */ /* XXX this stuff belongs elsewhere */ /* * Message formats for messages from the net80211 layer to user * applications via the routing socket. These messages are appended * to an if_announcemsghdr structure. */ struct ieee80211_join_event { uint8_t iev_addr[6]; }; struct ieee80211_leave_event { uint8_t iev_addr[6]; }; struct ieee80211_replay_event { uint8_t iev_src[6]; /* src MAC */ uint8_t iev_dst[6]; /* dst MAC */ uint8_t iev_cipher; /* cipher type */ uint8_t iev_keyix; /* key id/index */ uint64_t iev_keyrsc; /* RSC from key */ uint64_t iev_rsc; /* RSC from frame */ }; struct ieee80211_michael_event { uint8_t iev_src[6]; /* src MAC */ uint8_t iev_dst[6]; /* dst MAC */ uint8_t iev_cipher; /* cipher type */ uint8_t iev_keyix; /* key id/index */ }; struct ieee80211_wds_event { uint8_t iev_addr[6]; }; struct ieee80211_csa_event { uint32_t iev_flags; /* channel flags */ uint16_t iev_freq; /* setting in Mhz */ uint8_t iev_ieee; /* IEEE channel number */ uint8_t iev_mode; /* CSA mode */ uint8_t iev_count; /* CSA count */ }; struct ieee80211_cac_event { uint32_t iev_flags; /* channel flags */ uint16_t iev_freq; /* setting in Mhz */ uint8_t iev_ieee; /* IEEE channel number */ /* XXX timestamp? */ uint8_t iev_type; /* IEEE80211_NOTIFY_CAC_* */ }; struct ieee80211_radar_event { uint32_t iev_flags; /* channel flags */ uint16_t iev_freq; /* setting in Mhz */ uint8_t iev_ieee; /* IEEE channel number */ /* XXX timestamp? */ }; struct ieee80211_auth_event { uint8_t iev_addr[6]; }; struct ieee80211_deauth_event { uint8_t iev_addr[6]; }; struct ieee80211_country_event { uint8_t iev_addr[6]; uint8_t iev_cc[2]; /* ISO country code */ }; struct ieee80211_radio_event { uint8_t iev_state; /* 1 on, 0 off */ }; #define RTM_IEEE80211_ASSOC 100 /* station associate (bss mode) */ #define RTM_IEEE80211_REASSOC 101 /* station re-associate (bss mode) */ #define RTM_IEEE80211_DISASSOC 102 /* station disassociate (bss mode) */ #define RTM_IEEE80211_JOIN 103 /* station join (ap mode) */ #define RTM_IEEE80211_LEAVE 104 /* station leave (ap mode) */ #define RTM_IEEE80211_SCAN 105 /* scan complete, results available */ #define RTM_IEEE80211_REPLAY 106 /* sequence counter replay detected */ #define RTM_IEEE80211_MICHAEL 107 /* Michael MIC failure detected */ #define RTM_IEEE80211_REJOIN 108 /* station re-associate (ap mode) */ #define RTM_IEEE80211_WDS 109 /* WDS discovery (ap mode) */ #define RTM_IEEE80211_CSA 110 /* Channel Switch Announcement event */ #define RTM_IEEE80211_RADAR 111 /* radar event */ #define RTM_IEEE80211_CAC 112 /* Channel Availability Check event */ #define RTM_IEEE80211_DEAUTH 113 /* station deauthenticate */ #define RTM_IEEE80211_AUTH 114 /* station authenticate (ap mode) */ #define RTM_IEEE80211_COUNTRY 115 /* discovered country code (sta mode) */ #define RTM_IEEE80211_RADIO 116 /* RF kill switch state change */ /* * Structure prepended to raw packets sent through the bpf * interface when set to DLT_IEEE802_11_RADIO. This allows * user applications to specify pretty much everything in * an Atheros tx descriptor. XXX need to generalize. * * XXX cannot be more than 14 bytes as it is copied to a sockaddr's * XXX sa_data area. */ struct ieee80211_bpf_params { uint8_t ibp_vers; /* version */ #define IEEE80211_BPF_VERSION 0 uint8_t ibp_len; /* header length in bytes */ uint8_t ibp_flags; #define IEEE80211_BPF_SHORTPRE 0x01 /* tx with short preamble */ #define IEEE80211_BPF_NOACK 0x02 /* tx with no ack */ #define IEEE80211_BPF_CRYPTO 0x04 /* tx with h/w encryption */ #define IEEE80211_BPF_FCS 0x10 /* frame incldues FCS */ #define IEEE80211_BPF_DATAPAD 0x20 /* frame includes data padding */ #define IEEE80211_BPF_RTS 0x40 /* tx with RTS/CTS */ #define IEEE80211_BPF_CTS 0x80 /* tx with CTS only */ uint8_t ibp_pri; /* WME/WMM AC+tx antenna */ uint8_t ibp_try0; /* series 1 try count */ uint8_t ibp_rate0; /* series 1 IEEE tx rate */ uint8_t ibp_power; /* tx power (device units) */ uint8_t ibp_ctsrate; /* IEEE tx rate for CTS */ uint8_t ibp_try1; /* series 2 try count */ uint8_t ibp_rate1; /* series 2 IEEE tx rate */ uint8_t ibp_try2; /* series 3 try count */ uint8_t ibp_rate2; /* series 3 IEEE tx rate */ uint8_t ibp_try3; /* series 4 try count */ uint8_t ibp_rate3; /* series 4 IEEE tx rate */ }; #endif /* _NET80211_IEEE80211_FREEBSD_H_ */ diff --git a/sys/net80211/ieee80211_hostap.c b/sys/net80211/ieee80211_hostap.c index 492ef13418cb..c876dab84fb2 100644 --- a/sys/net80211/ieee80211_hostap.c +++ b/sys/net80211/ieee80211_hostap.c @@ -1,2242 +1,2238 @@ /*- * 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 #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, int rssi, int noise, uint32_t rstamp); static void hostap_deliver_data(struct ieee80211vap *, struct ieee80211_node *, struct mbuf *); static void hostap_recv_mgmt(struct ieee80211_node *, struct mbuf *, int subtype, int rssi, int noise, uint32_t rstamp); static void hostap_recv_pspoll(struct ieee80211_node *, struct mbuf *); 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_opdetach = hostap_vdetach; vap->iv_deliver_data = hostap_deliver_data; } 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); } } /* * 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_ext &= ~IEEE80211_FEXT_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_ext)); /* 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: /* * 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; 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; KASSERT(vap->iv_opmode == IEEE80211_M_HOSTAP, ("gack, opmode %d", vap->iv_opmode)); /* * Do accounting. */ ifp->if_ipackets++; 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); /* clear driver/net80211 flags before passing up */ m->m_flags &= ~M_80211_RX; /* 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_copypacket(m, M_DONTWAIT); if (mcopy == NULL) ifp->if_oerrors++; 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; IFQ_HANDOFF(ifp, mcopy, err); if (err) { /* NB: IFQ_HANDOFF reclaims mcopy */ } else { ifp->if_opackets++; } } } 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, int rssi, int noise, uint32_t rstamp) { #define SEQ_LEQ(a,b) ((int)((a)-(b)) <= 0) #define HAS_SEQ(type) ((type & 0x4) == 0) 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; uint8_t dir, type, subtype, qos; uint8_t *bssid; uint16_t rxseq; - if (m->m_flags & M_AMPDU) { + if (m->m_flags & M_AMPDU_MPDU) { /* * Fastpath for A-MPDU reorder q resubmission. Frames - * w/ M_AMPDU 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 flag and we can bypass most of the - * normal processing. + * 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; need_tap = 1; /* mbuf need to be tapped. */ 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 %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) { 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 = noise; ni->ni_rstamp = rstamp; 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++; rxseq = le16toh(*(uint16_t *)wh->i_seq); if ((ni->ni_flags & IEEE80211_NODE_HT) == 0 && (wh->i_fc[1] & IEEE80211_FC1_RETRY) && SEQ_LEQ(rxseq, ni->ni_rxseqs[tid])) { /* duplicate, discard */ IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, bssid, "duplicate", "seqno <%u,%u> fragno <%u,%u> tid %u", rxseq >> IEEE80211_SEQ_SEQ_SHIFT, ni->ni_rxseqs[tid] >> IEEE80211_SEQ_SEQ_SHIFT, rxseq & IEEE80211_SEQ_FRAG_MASK, ni->ni_rxseqs[tid] & IEEE80211_SEQ_FRAG_MASK, tid); vap->iv_stats.is_rx_dup++; IEEE80211_NODE_STAT(ni, rx_dup); goto out; } ni->ni_rxseqs[tid] = rxseq; } } 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))) ieee80211_node_pwrsave(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. The station must be - * associated and negotiated HT. The frame must be - * a QoS frame (not QoS null data) and not previously - * processed for A-MPDU re-ordering. If the frame is - * to be processed directly then ieee80211_ampdu_reorder + * 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 ((ni->ni_flags & IEEE80211_NODE_HT) && - subtype == IEEE80211_FC0_SUBTYPE_QOS && + 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_WEP) { 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_WEP; } 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 (bpf_peers_present(vap->iv_rawbpf)) bpf_mtap(vap->iv_rawbpf, 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 if ((ni->ni_ath_flags & IEEE80211_NODE_FF) && #define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc)) m->m_pkthdr.len >= 3*FF_LLC_SIZE) { struct llc *llc; /* * Check for fast-frame tunnel encapsulation. */ if (m->m_len < FF_LLC_SIZE && (m = m_pullup(m, FF_LLC_SIZE)) == NULL) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, "fast-frame", "%s", "m_pullup(llc) failed"); vap->iv_stats.is_rx_tooshort++; return IEEE80211_FC0_TYPE_DATA; } llc = (struct llc *)(mtod(m, uint8_t *) + sizeof(struct ether_header)); if (llc->llc_snap.ether_type == htons(ATH_FF_ETH_TYPE)) { m_adj(m, FF_LLC_SIZE); m = ieee80211_decap_fastframe(ni, m); if (m == NULL) return IEEE80211_FC0_TYPE_DATA; } } #undef FF_LLC_SIZE 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], ether_sprintf(wh->i_addr2), rssi); } #endif if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 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_WEP; } if (bpf_peers_present(vap->iv_rawbpf)) bpf_mtap(vap->iv_rawbpf, m); vap->iv_recv_mgmt(ni, m, subtype, rssi, noise, rstamp); m_freem(m); return IEEE80211_FC0_TYPE_MGT; case IEEE80211_FC0_TYPE_CTL: vap->iv_stats.is_rx_ctl++; IEEE80211_NODE_STAT(ni, rx_ctrl); switch (subtype) { case IEEE80211_FC0_SUBTYPE_PS_POLL: hostap_recv_pspoll(ni, m); break; case IEEE80211_FC0_SUBTYPE_BAR: ieee80211_recv_bar(ni, m); break; } goto out; default: IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, wh, "bad", "frame type 0x%x", type); /* should not come here */ break; } err: ifp->if_ierrors++; out: if (m != NULL) { if (bpf_peers_present(vap->iv_rawbpf) && need_tap) bpf_mtap(vap->iv_rawbpf, m); m_freem(m); } return type; #undef SEQ_LEQ } static void hostap_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh, int rssi, int noise, uint32_t rstamp, 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) { 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; 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 noise, uint32_t rstamp, 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; IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); ni->ni_noise = noise; ni->ni_rstamp = rstamp; 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 = LE_READ_4(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 = LE_READ_4(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: iswapoui already validated the OUI and type */ w = LE_READ_2(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 = LE_READ_2(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 = LE_READ_2(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 = LE_READ_2(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 = LE_READ_4(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 = LE_READ_4(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 = LE_READ_2(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 = LE_READ_2(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 = LE_READ_2(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 = LE_READ_2(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_OTHER); 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: case IEEE80211_FC0_SUBTYPE_BEACON: { struct ieee80211_scanparams scan; /* * 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 && subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) { vap->iv_stats.is_rx_mgtdiscard++; return; } /* NB: accept off-channel frames */ if (ieee80211_parse_beacon(ni, m0, &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, &scan, wh, subtype, rssi, noise, rstamp); 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; } /* * 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->i_addr2)) { 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, noise, rstamp, seq, status); else if (algo == IEEE80211_AUTH_ALG_OPEN) hostap_auth_open(ni, wh, rssi, noise, rstamp, 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; else if (isatherosoui(frm)) ath = frm; else if (vap->iv_flags_ext & IEEE80211_FEXT_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) { 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, htcap); } else if (ni->ni_flags & IEEE80211_NODE_HT) ieee80211_ht_node_cleanup(ni); /* * 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); vap->iv_stats.is_ht_assoc_downgrade++; } /* * If constrained to 11n-only stations reject legacy stations. */ if ((vap->iv_flags_ext & IEEE80211_FEXT_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 = noise; ni->ni_rstamp = rstamp; 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; if (ath != NULL) { setie(ath_ie, ath - sfrm); /* * Parse ATH station parameters. */ ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); } else 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)", ieee80211_mgt_subtype_name[subtype >> IEEE80211_FC0_SUBTYPE_SHIFT], reason); if (ni != vap->iv_bss) ieee80211_node_leave(ni); break; } case IEEE80211_FC0_SUBTYPE_ACTION: if (vap->iv_state == IEEE80211_S_RUN) { if (ieee80211_parse_action(ni, m0) == 0) ic->ic_recv_action(ni, frm, efrm); } else vap->iv_stats.is_rx_mgtdiscard++; break; case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: default: IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, wh, "mgt", "subtype 0x%x not handled", subtype); vap->iv_stats.is_rx_badsubtype++; break; } } /* * Process a received ps-poll frame. */ static void hostap_recv_pspoll(struct ieee80211_node *ni, struct mbuf *m0) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211_frame_min *wh; struct ifnet *ifp = vap->iv_ifp; 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... */ IEEE80211_NODE_SAVEQ_DEQUEUE(ni, m, 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 */ IF_ENQUEUE(&ifp->if_snd, m); if_start(ifp); } diff --git a/sys/net80211/ieee80211_ht.c b/sys/net80211/ieee80211_ht.c index 5356a66b5844..f3c0adf14633 100644 --- a/sys/net80211/ieee80211_ht.c +++ b/sys/net80211/ieee80211_ht.c @@ -1,2179 +1,2187 @@ /*- * 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 802.11n protocol support. */ #include "opt_inet.h" #include "opt_wlan.h" #include #include #include #include #include #include #include #include #include #include /* define here, used throughout file */ #define MS(_v, _f) (((_v) & _f) >> _f##_S) #define SM(_v, _f) (((_v) << _f##_S) & _f) const struct ieee80211_mcs_rates ieee80211_htrates[16] = { { 13, 14, 27, 30 }, /* MCS 0 */ { 26, 29, 54, 60 }, /* MCS 1 */ { 39, 43, 81, 90 }, /* MCS 2 */ { 52, 58, 108, 120 }, /* MCS 3 */ { 78, 87, 162, 180 }, /* MCS 4 */ { 104, 116, 216, 240 }, /* MCS 5 */ { 117, 130, 243, 270 }, /* MCS 6 */ { 130, 144, 270, 300 }, /* MCS 7 */ { 26, 29, 54, 60 }, /* MCS 8 */ { 52, 58, 108, 120 }, /* MCS 9 */ { 78, 87, 162, 180 }, /* MCS 10 */ { 104, 116, 216, 240 }, /* MCS 11 */ { 156, 173, 324, 360 }, /* MCS 12 */ { 208, 231, 432, 480 }, /* MCS 13 */ { 234, 260, 486, 540 }, /* MCS 14 */ { 260, 289, 540, 600 } /* MCS 15 */ }; static const struct ieee80211_htrateset ieee80211_rateset_11n = { 16, { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 } }; #ifdef IEEE80211_AMPDU_AGE /* XXX public for sysctl hookup */ int ieee80211_ampdu_age = -1; /* threshold for ampdu reorder q (ms) */ #endif int ieee80211_recv_bar_ena = 1; int ieee80211_addba_timeout = -1; /* timeout waiting for ADDBA response */ int ieee80211_addba_backoff = -1; /* backoff after max ADDBA requests */ int ieee80211_addba_maxtries = 3; /* max ADDBA requests before backoff */ /* * Setup HT parameters that depends on the clock frequency. */ static void ieee80211_ht_setup(void) { #ifdef IEEE80211_AMPDU_AGE ieee80211_ampdu_age = msecs_to_ticks(500); #endif ieee80211_addba_timeout = msecs_to_ticks(250); ieee80211_addba_backoff = msecs_to_ticks(10*1000); } SYSINIT(wlan_ht, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_ht_setup, NULL); static int ieee80211_ampdu_enable(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap); static int ieee80211_addba_request(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, int dialogtoken, int baparamset, int batimeout); static int ieee80211_addba_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, int code, int baparamset, int batimeout); static void ieee80211_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap); static void ieee80211_aggr_recv_action(struct ieee80211_node *ni, const uint8_t *frm, const uint8_t *efrm); void ieee80211_ht_attach(struct ieee80211com *ic) { /* setup default aggregation policy */ ic->ic_recv_action = ieee80211_aggr_recv_action; ic->ic_send_action = ieee80211_send_action; ic->ic_ampdu_enable = ieee80211_ampdu_enable; ic->ic_addba_request = ieee80211_addba_request; ic->ic_addba_response = ieee80211_addba_response; ic->ic_addba_stop = ieee80211_addba_stop; ic->ic_htprotmode = IEEE80211_PROT_RTSCTS; ic->ic_curhtprotmode = IEEE80211_HTINFO_OPMODE_PURE; } void ieee80211_ht_detach(struct ieee80211com *ic) { } void ieee80211_ht_vattach(struct ieee80211vap *vap) { /* driver can override defaults */ vap->iv_ampdu_rxmax = IEEE80211_HTCAP_MAXRXAMPDU_8K; vap->iv_ampdu_density = IEEE80211_HTCAP_MPDUDENSITY_NA; vap->iv_ampdu_limit = vap->iv_ampdu_rxmax; vap->iv_amsdu_limit = vap->iv_htcaps & IEEE80211_HTCAP_MAXAMSDU; /* tx aggregation traffic thresholds */ vap->iv_ampdu_mintraffic[WME_AC_BK] = 128; vap->iv_ampdu_mintraffic[WME_AC_BE] = 64; vap->iv_ampdu_mintraffic[WME_AC_VO] = 32; vap->iv_ampdu_mintraffic[WME_AC_VI] = 32; if (vap->iv_htcaps & IEEE80211_HTC_HT) { /* * Device is HT capable; enable all HT-related * facilities by default. * XXX these choices may be too aggressive. */ vap->iv_flags_ext |= IEEE80211_FEXT_HT | IEEE80211_FEXT_HTCOMPAT ; if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI20) vap->iv_flags_ext |= IEEE80211_FEXT_SHORTGI20; /* XXX infer from channel list? */ if (vap->iv_htcaps & IEEE80211_HTCAP_CHWIDTH40) { vap->iv_flags_ext |= IEEE80211_FEXT_USEHT40; if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI40) vap->iv_flags_ext |= IEEE80211_FEXT_SHORTGI40; } /* NB: A-MPDU and A-MSDU rx are mandated, these are tx only */ vap->iv_flags_ext |= IEEE80211_FEXT_AMPDU_RX; if (vap->iv_htcaps & IEEE80211_HTC_AMPDU) vap->iv_flags_ext |= IEEE80211_FEXT_AMPDU_TX; vap->iv_flags_ext |= IEEE80211_FEXT_AMSDU_RX; if (vap->iv_htcaps & IEEE80211_HTC_AMSDU) vap->iv_flags_ext |= IEEE80211_FEXT_AMSDU_TX; } /* NB: disable default legacy WDS, too many issues right now */ if (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) vap->iv_flags_ext &= ~IEEE80211_FEXT_HT; } void ieee80211_ht_vdetach(struct ieee80211vap *vap) { } static void ht_announce(struct ieee80211com *ic, int mode, const struct ieee80211_htrateset *rs) { struct ifnet *ifp = ic->ic_ifp; int i, rate, mword; if_printf(ifp, "%s MCS: ", ieee80211_phymode_name[mode]); for (i = 0; i < rs->rs_nrates; i++) { mword = ieee80211_rate2media(ic, rs->rs_rates[i] | IEEE80211_RATE_MCS, mode); if (IFM_SUBTYPE(mword) != IFM_IEEE80211_MCS) continue; rate = ieee80211_htrates[rs->rs_rates[i]].ht40_rate_400ns; printf("%s%d%sMbps", (i != 0 ? " " : ""), rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); } printf("\n"); } void ieee80211_ht_announce(struct ieee80211com *ic) { if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA)) ht_announce(ic, IEEE80211_MODE_11NA, &ieee80211_rateset_11n); if (isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) ht_announce(ic, IEEE80211_MODE_11NG, &ieee80211_rateset_11n); } const struct ieee80211_htrateset * ieee80211_get_suphtrates(struct ieee80211com *ic, const struct ieee80211_channel *c) { return &ieee80211_rateset_11n; } /* * Receive processing. */ /* * Decap the encapsulated A-MSDU frames and dispatch all but * the last for delivery. The last frame is returned for * delivery via the normal path. */ struct mbuf * ieee80211_decap_amsdu(struct ieee80211_node *ni, struct mbuf *m) { struct ieee80211vap *vap = ni->ni_vap; int framelen; struct mbuf *n; /* discard 802.3 header inserted by ieee80211_decap */ m_adj(m, sizeof(struct ether_header)); vap->iv_stats.is_amsdu_decap++; for (;;) { /* * Decap the first frame, bust it apart from the * remainder and deliver. We leave the last frame * delivery to the caller (for consistency with other * code paths, could also do it here). */ m = ieee80211_decap1(m, &framelen); if (m == NULL) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, "a-msdu", "%s", "decap failed"); vap->iv_stats.is_amsdu_tooshort++; return NULL; } if (m->m_pkthdr.len == framelen) break; n = m_split(m, framelen, M_NOWAIT); if (n == NULL) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, "a-msdu", "%s", "unable to split encapsulated frames"); vap->iv_stats.is_amsdu_split++; m_freem(m); /* NB: must reclaim */ return NULL; } vap->iv_deliver_data(vap, ni, m); /* * Remove frame contents; each intermediate frame * is required to be aligned to a 4-byte boundary. */ m = n; m_adj(m, roundup2(framelen, 4) - framelen); /* padding */ } return m; /* last delivered by caller */ } /* * Purge all frames in the A-MPDU re-order queue. */ static void ampdu_rx_purge(struct ieee80211_rx_ampdu *rap) { struct mbuf *m; int i; for (i = 0; i < rap->rxa_wnd; i++) { m = rap->rxa_m[i]; if (m != NULL) { rap->rxa_m[i] = NULL; rap->rxa_qbytes -= m->m_pkthdr.len; m_freem(m); if (--rap->rxa_qframes == 0) break; } } KASSERT(rap->rxa_qbytes == 0 && rap->rxa_qframes == 0, ("lost %u data, %u frames on ampdu rx q", rap->rxa_qbytes, rap->rxa_qframes)); } /* * Start A-MPDU rx/re-order processing for the specified TID. */ static void ampdu_rx_start(struct ieee80211_rx_ampdu *rap, int bufsiz, int start) { if (rap->rxa_flags & IEEE80211_AGGR_RUNNING) { /* * AMPDU previously setup and not terminated with a DELBA, * flush the reorder q's in case anything remains. */ ampdu_rx_purge(rap); } memset(rap, 0, sizeof(*rap)); rap->rxa_wnd = (bufsiz == 0) ? IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); rap->rxa_start = start; rap->rxa_flags |= IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND; } /* * Stop A-MPDU rx processing for the specified TID. */ static void ampdu_rx_stop(struct ieee80211_rx_ampdu *rap) { ampdu_rx_purge(rap); rap->rxa_flags &= ~(IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND); } /* * Dispatch a frame from the A-MPDU reorder queue. The * frame is fed back into ieee80211_input marked with an - * M_AMPDU flag so it doesn't come back to us (it also + * M_AMPDU_MPDU flag so it doesn't come back to us (it also * permits ieee80211_input to optimize re-processing). */ static __inline void ampdu_dispatch(struct ieee80211_node *ni, struct mbuf *m) { - m->m_flags |= M_AMPDU; /* bypass normal processing */ - /* NB: rssi, noise, and rstamp are ignored w/ M_AMPDU set */ + m->m_flags |= M_AMPDU_MPDU; /* bypass normal processing */ + /* NB: rssi, noise, and rstamp are ignored w/ M_AMPDU_MPDU set */ (void) ieee80211_input(ni, m, 0, 0, 0); } /* * Dispatch as many frames as possible from the re-order queue. * Frames will always be "at the front"; we process all frames * up to the first empty slot in the window. On completion we * cleanup state if there are still pending frames in the current * BA window. We assume the frame at slot 0 is already handled * by the caller; we always start at slot 1. */ static void ampdu_rx_dispatch(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni) { struct ieee80211vap *vap = ni->ni_vap; struct mbuf *m; int i; /* flush run of frames */ for (i = 1; i < rap->rxa_wnd; i++) { m = rap->rxa_m[i]; if (m == NULL) break; rap->rxa_m[i] = NULL; rap->rxa_qbytes -= m->m_pkthdr.len; rap->rxa_qframes--; ampdu_dispatch(ni, m); } /* * If frames remain, copy the mbuf pointers down so * they correspond to the offsets in the new window. */ if (rap->rxa_qframes != 0) { int n = rap->rxa_qframes, j; for (j = i+1; j < rap->rxa_wnd; j++) { if (rap->rxa_m[j] != NULL) { rap->rxa_m[j-i] = rap->rxa_m[j]; rap->rxa_m[j] = NULL; if (--n == 0) break; } } KASSERT(n == 0, ("lost %d frames", n)); vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes; } /* * Adjust the start of the BA window to * reflect the frames just dispatched. */ rap->rxa_start = IEEE80211_SEQ_ADD(rap->rxa_start, i); vap->iv_stats.is_ampdu_rx_oor += i; } #ifdef IEEE80211_AMPDU_AGE /* * Dispatch all frames in the A-MPDU re-order queue. */ static void ampdu_rx_flush(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap) { struct ieee80211vap *vap = ni->ni_vap; struct mbuf *m; int i; for (i = 0; i < rap->rxa_wnd; i++) { m = rap->rxa_m[i]; if (m == NULL) continue; rap->rxa_m[i] = NULL; rap->rxa_qbytes -= m->m_pkthdr.len; rap->rxa_qframes--; vap->iv_stats.is_ampdu_rx_oor++; ampdu_dispatch(ni, m); if (rap->rxa_qframes == 0) break; } } #endif /* IEEE80211_AMPDU_AGE */ /* * Dispatch all frames in the A-MPDU re-order queue * preceding the specified sequence number. This logic * handles window moves due to a received MSDU or BAR. */ static void ampdu_rx_flush_upto(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap, ieee80211_seq winstart) { struct ieee80211vap *vap = ni->ni_vap; struct mbuf *m; ieee80211_seq seqno; int i; /* * Flush any complete MSDU's with a sequence number lower * than winstart. Gaps may exist. Note that we may actually * dispatch frames past winstart if a run continues; this is * an optimization that avoids having to do a separate pass * to dispatch frames after moving the BA window start. */ seqno = rap->rxa_start; for (i = 0; i < rap->rxa_wnd; i++) { m = rap->rxa_m[i]; if (m != NULL) { rap->rxa_m[i] = NULL; rap->rxa_qbytes -= m->m_pkthdr.len; rap->rxa_qframes--; vap->iv_stats.is_ampdu_rx_oor++; ampdu_dispatch(ni, m); } else { if (!IEEE80211_SEQ_BA_BEFORE(seqno, winstart)) break; } seqno = IEEE80211_SEQ_INC(seqno); } /* * If frames remain, copy the mbuf pointers down so * they correspond to the offsets in the new window. */ if (rap->rxa_qframes != 0) { int n = rap->rxa_qframes, j; /* NB: this loop assumes i > 0 and/or rxa_m[0] is NULL */ KASSERT(rap->rxa_m[0] == NULL, ("%s: BA window slot 0 occupied", __func__)); for (j = i+1; j < rap->rxa_wnd; j++) { if (rap->rxa_m[j] != NULL) { rap->rxa_m[j-i] = rap->rxa_m[j]; rap->rxa_m[j] = NULL; if (--n == 0) break; } } KASSERT(n == 0, ("%s: lost %d frames, qframes %d off %d " "BA win <%d:%d> winstart %d", __func__, n, rap->rxa_qframes, i, rap->rxa_start, IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), winstart)); vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes; } /* * Move the start of the BA window; we use the * sequence number of the last MSDU that was * passed up the stack+1 or winstart if stopped on * a gap in the reorder buffer. */ rap->rxa_start = seqno; } /* * Process a received QoS data frame for an HT station. Handle * A-MPDU reordering: if this frame is received out of order * and falls within the BA window hold onto it. Otherwise if * this frame completes a run, flush any pending frames. We * return 1 if the frame is consumed. A 0 is returned if * the frame should be processed normally by the caller. */ int ieee80211_ampdu_reorder(struct ieee80211_node *ni, struct mbuf *m) { #define IEEE80211_FC0_QOSDATA \ (IEEE80211_FC0_TYPE_DATA|IEEE80211_FC0_SUBTYPE_QOS|IEEE80211_FC0_VERSION_0) #define PROCESS 0 /* caller should process frame */ #define CONSUMED 1 /* frame consumed, caller does nothing */ struct ieee80211vap *vap = ni->ni_vap; struct ieee80211_qosframe *wh; struct ieee80211_rx_ampdu *rap; ieee80211_seq rxseq; uint8_t tid; int off; + KASSERT((m->m_flags & (M_AMPDU | M_AMPDU_MPDU)) == M_AMPDU, + ("!a-mpdu or already re-ordered, flags 0x%x", m->m_flags)); KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta")); /* NB: m_len known to be sufficient */ wh = mtod(m, struct ieee80211_qosframe *); - KASSERT(wh->i_fc[0] == IEEE80211_FC0_QOSDATA, ("not QoS data")); + if (wh->i_fc[0] != IEEE80211_FC0_QOSDATA) { + /* + * Not QoS data, shouldn't get here but just + * return it to the caller for processing. + */ + return PROCESS; + } if ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS) tid = ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0]; else tid = wh->i_qos[0]; tid &= IEEE80211_QOS_TID; rap = &ni->ni_rx_ampdu[tid]; if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { /* * No ADDBA request yet, don't touch. */ return PROCESS; } rxseq = le16toh(*(uint16_t *)wh->i_seq); if ((rxseq & IEEE80211_SEQ_FRAG_MASK) != 0) { /* * Fragments are not allowed; toss. */ IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, "A-MPDU", "fragment, rxseq 0x%x tid %u%s", rxseq, tid, wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); vap->iv_stats.is_ampdu_rx_drop++; IEEE80211_NODE_STAT(ni, rx_drop); m_freem(m); return CONSUMED; } rxseq >>= IEEE80211_SEQ_SEQ_SHIFT; rap->rxa_nframes++; again: if (rxseq == rap->rxa_start) { /* * First frame in window. */ if (rap->rxa_qframes != 0) { /* * Dispatch as many packets as we can. */ KASSERT(rap->rxa_m[0] == NULL, ("unexpected dup")); ampdu_dispatch(ni, m); ampdu_rx_dispatch(rap, ni); return CONSUMED; } else { /* * In order; advance window and notify * caller to dispatch directly. */ rap->rxa_start = IEEE80211_SEQ_INC(rxseq); return PROCESS; } } /* * Frame is out of order; store if in the BA window. */ /* calculate offset in BA window */ off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start); if (off < rap->rxa_wnd) { /* * Common case (hopefully): in the BA window. * Sec 9.10.7.6 a) (D2.04 p.118 line 47) */ #ifdef IEEE80211_AMPDU_AGE /* * Check for frames sitting too long in the reorder queue. * This should only ever happen if frames are not delivered * without the sender otherwise notifying us (e.g. with a * BAR to move the window). Typically this happens because * of vendor bugs that cause the sequence number to jump. * When this happens we get a gap in the reorder queue that * leaves frame sitting on the queue until they get pushed * out due to window moves. When the vendor does not send * BAR this move only happens due to explicit packet sends * * NB: we only track the time of the oldest frame in the * reorder q; this means that if we flush we might push * frames that still "new"; if this happens then subsequent * frames will result in BA window moves which cost something * but is still better than a big throughput dip. */ if (rap->rxa_qframes != 0) { /* XXX honor batimeout? */ if (ticks - rap->rxa_age > ieee80211_ampdu_age) { /* * Too long since we received the first * frame; flush the reorder buffer. */ if (rap->rxa_qframes != 0) { vap->iv_stats.is_ampdu_rx_age += rap->rxa_qframes; ampdu_rx_flush(ni, rap); } rap->rxa_start = IEEE80211_SEQ_INC(rxseq); return PROCESS; } } else { /* * First frame, start aging timer. */ rap->rxa_age = ticks; } #endif /* IEEE80211_AMPDU_AGE */ /* save packet */ if (rap->rxa_m[off] == NULL) { rap->rxa_m[off] = m; rap->rxa_qframes++; rap->rxa_qbytes += m->m_pkthdr.len; vap->iv_stats.is_ampdu_rx_reorder++; } else { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, "a-mpdu duplicate", "seqno %u tid %u BA win <%u:%u>", rxseq, tid, rap->rxa_start, IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1)); vap->iv_stats.is_rx_dup++; IEEE80211_NODE_STAT(ni, rx_dup); m_freem(m); } return CONSUMED; } if (off < IEEE80211_SEQ_BA_RANGE) { /* * Outside the BA window, but within range; * flush the reorder q and move the window. * Sec 9.10.7.6 b) (D2.04 p.118 line 60) */ IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, "move BA win <%u:%u> (%u frames) rxseq %u tid %u", rap->rxa_start, IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), rap->rxa_qframes, rxseq, tid); vap->iv_stats.is_ampdu_rx_move++; /* * The spec says to flush frames up to but not including: * WinStart_B = rxseq - rap->rxa_wnd + 1 * Then insert the frame or notify the caller to process * it immediately. We can safely do this by just starting * over again because we know the frame will now be within * the BA window. */ /* NB: rxa_wnd known to be >0 */ ampdu_rx_flush_upto(ni, rap, IEEE80211_SEQ_SUB(rxseq, rap->rxa_wnd-1)); goto again; } else { /* * Outside the BA window and out of range; toss. * Sec 9.10.7.6 c) (D2.04 p.119 line 16) */ IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, "MPDU", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s", rap->rxa_start, IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), rap->rxa_qframes, rxseq, tid, wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); vap->iv_stats.is_ampdu_rx_drop++; IEEE80211_NODE_STAT(ni, rx_drop); m_freem(m); return CONSUMED; } #undef CONSUMED #undef PROCESS #undef IEEE80211_FC0_QOSDATA } /* * Process a BAR ctl frame. Dispatch all frames up to * the sequence number of the frame. If this frame is * out of range it's discarded. */ void ieee80211_recv_bar(struct ieee80211_node *ni, struct mbuf *m0) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211_frame_bar *wh; struct ieee80211_rx_ampdu *rap; ieee80211_seq rxseq; int tid, off; if (!ieee80211_recv_bar_ena) { #if 0 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_11N, ni->ni_macaddr, "BAR", "%s", "processing disabled"); #endif vap->iv_stats.is_ampdu_bar_bad++; return; } wh = mtod(m0, struct ieee80211_frame_bar *); /* XXX check basic BAR */ tid = MS(le16toh(wh->i_ctl), IEEE80211_BAR_TID); rap = &ni->ni_rx_ampdu[tid]; if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { /* * No ADDBA request yet, don't touch. */ IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, "BAR", "no BA stream, tid %u", tid); vap->iv_stats.is_ampdu_bar_bad++; return; } vap->iv_stats.is_ampdu_bar_rx++; rxseq = le16toh(wh->i_seq) >> IEEE80211_SEQ_SEQ_SHIFT; if (rxseq == rap->rxa_start) return; /* calculate offset in BA window */ off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start); if (off < IEEE80211_SEQ_BA_RANGE) { /* * Flush the reorder q up to rxseq and move the window. * Sec 9.10.7.6 a) (D2.04 p.119 line 22) */ IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, "BAR moves BA win <%u:%u> (%u frames) rxseq %u tid %u", rap->rxa_start, IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), rap->rxa_qframes, rxseq, tid); vap->iv_stats.is_ampdu_bar_move++; ampdu_rx_flush_upto(ni, rap, rxseq); if (off >= rap->rxa_wnd) { /* * BAR specifies a window start to the right of BA * window; we must move it explicitly since * ampdu_rx_flush_upto will not. */ rap->rxa_start = rxseq; } } else { /* * Out of range; toss. * Sec 9.10.7.6 b) (D2.04 p.119 line 41) */ IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, "BAR", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s", rap->rxa_start, IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), rap->rxa_qframes, rxseq, tid, wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); vap->iv_stats.is_ampdu_bar_oow++; IEEE80211_NODE_STAT(ni, rx_drop); } } /* * Setup HT-specific state in a node. Called only * when HT use is negotiated so we don't do extra * work for temporary and/or legacy sta's. */ void ieee80211_ht_node_init(struct ieee80211_node *ni, const uint8_t *htcap) { struct ieee80211_tx_ampdu *tap; int ac; if (ni->ni_flags & IEEE80211_NODE_HT) { /* * Clean AMPDU state on re-associate. This handles the case * where a station leaves w/o notifying us and then returns * before node is reaped for inactivity. */ ieee80211_ht_node_cleanup(ni); } ieee80211_parse_htcap(ni, htcap); for (ac = 0; ac < WME_NUM_AC; ac++) { tap = &ni->ni_tx_ampdu[ac]; tap->txa_ac = ac; /* NB: further initialization deferred */ } ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU; } /* * Cleanup HT-specific state in a node. Called only * when HT use has been marked. */ void ieee80211_ht_node_cleanup(struct ieee80211_node *ni) { struct ieee80211com *ic = ni->ni_ic; int i; KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT node")); /* XXX optimize this */ for (i = 0; i < WME_NUM_AC; i++) { struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[i]; if (tap->txa_flags & IEEE80211_AGGR_SETUP) { /* * Stop BA stream if setup so driver has a chance * to reclaim any resources it might have allocated. */ ic->ic_addba_stop(ni, &ni->ni_tx_ampdu[i]); tap->txa_lastsample = 0; tap->txa_avgpps = 0; /* NB: clearing NAK means we may re-send ADDBA */ tap->txa_flags &= ~(IEEE80211_AGGR_SETUP | IEEE80211_AGGR_NAK); } } for (i = 0; i < WME_NUM_TID; i++) ampdu_rx_stop(&ni->ni_rx_ampdu[i]); ni->ni_htcap = 0; ni->ni_flags &= ~IEEE80211_NODE_HT_ALL; } /* * Age out HT resources for a station. */ void ieee80211_ht_node_age(struct ieee80211_node *ni) { #ifdef IEEE80211_AMPDU_AGE struct ieee80211vap *vap = ni->ni_vap; uint8_t tid; #endif KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta")); #ifdef IEEE80211_AMPDU_AGE for (tid = 0; tid < WME_NUM_TID; tid++) { struct ieee80211_rx_ampdu *rap; rap = &ni->ni_rx_ampdu[tid]; if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) continue; if (rap->rxa_qframes == 0) continue; /* * Check for frames sitting too long in the reorder queue. * See above for more details on what's happening here. */ /* XXX honor batimeout? */ if (ticks - rap->rxa_age > ieee80211_ampdu_age) { /* * Too long since we received the first * frame; flush the reorder buffer. */ vap->iv_stats.is_ampdu_rx_age += rap->rxa_qframes; ampdu_rx_flush(ni, rap); } } #endif /* IEEE80211_AMPDU_AGE */ } static struct ieee80211_channel * findhtchan(struct ieee80211com *ic, struct ieee80211_channel *c, int htflags) { return ieee80211_find_channel(ic, c->ic_freq, (c->ic_flags &~ IEEE80211_CHAN_HT) | htflags); } /* * Adjust a channel to be HT/non-HT according to the vap's configuration. */ struct ieee80211_channel * ieee80211_ht_adjust_channel(struct ieee80211com *ic, struct ieee80211_channel *chan, int flags) { struct ieee80211_channel *c; if (flags & IEEE80211_FEXT_HT) { /* promote to HT if possible */ if (flags & IEEE80211_FEXT_USEHT40) { if (!IEEE80211_IS_CHAN_HT40(chan)) { /* NB: arbitrarily pick ht40+ over ht40- */ c = findhtchan(ic, chan, IEEE80211_CHAN_HT40U); if (c == NULL) c = findhtchan(ic, chan, IEEE80211_CHAN_HT40D); if (c == NULL) c = findhtchan(ic, chan, IEEE80211_CHAN_HT20); if (c != NULL) chan = c; } } else if (!IEEE80211_IS_CHAN_HT20(chan)) { c = findhtchan(ic, chan, IEEE80211_CHAN_HT20); if (c != NULL) chan = c; } } else if (IEEE80211_IS_CHAN_HT(chan)) { /* demote to legacy, HT use is disabled */ c = ieee80211_find_channel(ic, chan->ic_freq, chan->ic_flags &~ IEEE80211_CHAN_HT); if (c != NULL) chan = c; } return chan; } /* * Setup HT-specific state for a legacy WDS peer. */ void ieee80211_ht_wds_init(struct ieee80211_node *ni) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211_tx_ampdu *tap; int ac; KASSERT(vap->iv_flags_ext & IEEE80211_FEXT_HT, ("no HT requested")); /* XXX check scan cache in case peer has an ap and we have info */ /* * If setup with a legacy channel; locate an HT channel. * Otherwise if the inherited channel (from a companion * AP) is suitable use it so we use the same location * for the extension channel). */ ni->ni_chan = ieee80211_ht_adjust_channel(ni->ni_ic, ni->ni_chan, ieee80211_htchanflags(ni->ni_chan)); ni->ni_htcap = 0; if (vap->iv_flags_ext & IEEE80211_FEXT_SHORTGI20) ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI20; if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) { ni->ni_htcap |= IEEE80211_HTCAP_CHWIDTH40; ni->ni_chw = 40; if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan)) ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_ABOVE; else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan)) ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_BELOW; if (vap->iv_flags_ext & IEEE80211_FEXT_SHORTGI40) ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI40; } else { ni->ni_chw = 20; ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_NONE; } ni->ni_htctlchan = ni->ni_chan->ic_ieee; ni->ni_htopmode = 0; /* XXX need protection state */ ni->ni_htstbc = 0; /* XXX need info */ for (ac = 0; ac < WME_NUM_AC; ac++) { tap = &ni->ni_tx_ampdu[ac]; tap->txa_ac = ac; } /* NB: AMPDU tx/rx governed by IEEE80211_FEXT_AMPDU_{TX,RX} */ ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU; } /* * Notify hostap vaps of a change in the HTINFO ie. */ static void htinfo_notify(struct ieee80211com *ic) { struct ieee80211vap *vap; int first = 1; IEEE80211_LOCK_ASSERT(ic); TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { if (vap->iv_opmode != IEEE80211_M_HOSTAP) continue; if (first) { IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, vap->iv_bss, "HT bss occupancy change: %d sta, %d ht, " "%d ht40%s, HT protmode now 0x%x" , ic->ic_sta_assoc , ic->ic_ht_sta_assoc , ic->ic_ht40_sta_assoc , (ic->ic_flags_ext & IEEE80211_FEXT_NONHT_PR) ? ", non-HT sta present" : "" , ic->ic_curhtprotmode); first = 0; } ieee80211_beacon_notify(vap, IEEE80211_BEACON_HTINFO); } } /* * Calculate HT protection mode from current * state and handle updates. */ static void htinfo_update(struct ieee80211com *ic) { uint8_t protmode; if (ic->ic_sta_assoc != ic->ic_ht_sta_assoc) { protmode = IEEE80211_HTINFO_OPMODE_MIXED | IEEE80211_HTINFO_NONHT_PRESENT; } else if (ic->ic_flags_ext & IEEE80211_FEXT_NONHT_PR) { protmode = IEEE80211_HTINFO_OPMODE_PROTOPT | IEEE80211_HTINFO_NONHT_PRESENT; } else if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && IEEE80211_IS_CHAN_HT40(ic->ic_bsschan) && ic->ic_sta_assoc != ic->ic_ht40_sta_assoc) { protmode = IEEE80211_HTINFO_OPMODE_HT20PR; } else { protmode = IEEE80211_HTINFO_OPMODE_PURE; } if (protmode != ic->ic_curhtprotmode) { ic->ic_curhtprotmode = protmode; htinfo_notify(ic); } } /* * Handle an HT station joining a BSS. */ void ieee80211_ht_node_join(struct ieee80211_node *ni) { struct ieee80211com *ic = ni->ni_ic; IEEE80211_LOCK_ASSERT(ic); if (ni->ni_flags & IEEE80211_NODE_HT) { ic->ic_ht_sta_assoc++; if (ni->ni_chw == 40) ic->ic_ht40_sta_assoc++; } htinfo_update(ic); } /* * Handle an HT station leaving a BSS. */ void ieee80211_ht_node_leave(struct ieee80211_node *ni) { struct ieee80211com *ic = ni->ni_ic; IEEE80211_LOCK_ASSERT(ic); if (ni->ni_flags & IEEE80211_NODE_HT) { ic->ic_ht_sta_assoc--; if (ni->ni_chw == 40) ic->ic_ht40_sta_assoc--; } htinfo_update(ic); } /* * Public version of htinfo_update; used for processing * beacon frames from overlapping bss. * * Caller can specify either IEEE80211_HTINFO_OPMODE_MIXED * (on receipt of a beacon that advertises MIXED) or * IEEE80211_HTINFO_OPMODE_PROTOPT (on receipt of a beacon * from an overlapping legacy bss). We treat MIXED with * a higher precedence than PROTOPT (i.e. we will not change * change PROTOPT -> MIXED; only MIXED -> PROTOPT). This * corresponds to how we handle things in htinfo_update. */ void ieee80211_htprot_update(struct ieee80211com *ic, int protmode) { #define OPMODE(x) SM(x, IEEE80211_HTINFO_OPMODE) IEEE80211_LOCK(ic); /* track non-HT station presence */ KASSERT(protmode & IEEE80211_HTINFO_NONHT_PRESENT, ("protmode 0x%x", protmode)); ic->ic_flags_ext |= IEEE80211_FEXT_NONHT_PR; ic->ic_lastnonht = ticks; if (protmode != ic->ic_curhtprotmode && (OPMODE(ic->ic_curhtprotmode) != IEEE80211_HTINFO_OPMODE_MIXED || OPMODE(protmode) == IEEE80211_HTINFO_OPMODE_PROTOPT)) { /* push beacon update */ ic->ic_curhtprotmode = protmode; htinfo_notify(ic); } IEEE80211_UNLOCK(ic); #undef OPMODE } /* * Time out presence of an overlapping bss with non-HT * stations. When operating in hostap mode we listen for * beacons from other stations and if we identify a non-HT * station is present we update the opmode field of the * HTINFO ie. To identify when all non-HT stations are * gone we time out this condition. */ void ieee80211_ht_timeout(struct ieee80211com *ic) { IEEE80211_LOCK_ASSERT(ic); if ((ic->ic_flags_ext & IEEE80211_FEXT_NONHT_PR) && time_after(ticks, ic->ic_lastnonht + IEEE80211_NONHT_PRESENT_AGE)) { #if 0 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, "%s", "time out non-HT STA present on channel"); #endif ic->ic_flags_ext &= ~IEEE80211_FEXT_NONHT_PR; htinfo_update(ic); } } /* unalligned little endian access */ #define LE_READ_2(p) \ ((uint16_t) \ ((((const uint8_t *)(p))[0] ) | \ (((const uint8_t *)(p))[1] << 8))) /* * Process an 802.11n HT capabilities ie. */ void ieee80211_parse_htcap(struct ieee80211_node *ni, const uint8_t *ie) { struct ieee80211vap *vap = ni->ni_vap; if (ie[0] == IEEE80211_ELEMID_VENDOR) { /* * Station used Vendor OUI ie to associate; * mark the node so when we respond we'll use * the Vendor OUI's and not the standard ie's. */ ni->ni_flags |= IEEE80211_NODE_HTCOMPAT; ie += 4; } else ni->ni_flags &= ~IEEE80211_NODE_HTCOMPAT; ni->ni_htcap = LE_READ_2(ie + __offsetof(struct ieee80211_ie_htcap, hc_cap)); ni->ni_htparam = ie[__offsetof(struct ieee80211_ie_htcap, hc_param)]; /* XXX needed or will ieee80211_parse_htinfo always be called? */ ni->ni_chw = (ni->ni_htcap & IEEE80211_HTCAP_CHWIDTH40) && (vap->iv_flags_ext & IEEE80211_FEXT_USEHT40) ? 40 : 20; } /* * Process an 802.11n HT info ie and update the node state. * Note that we handle use this information to identify the * correct channel (HT20, HT40+, HT40-, legacy). The caller * is responsible for insuring any required channel change is * done (e.g. in sta mode when parsing the contents of a * beacon frame). */ void ieee80211_parse_htinfo(struct ieee80211_node *ni, const uint8_t *ie) { struct ieee80211com *ic = ni->ni_ic; struct ieee80211vap *vap = ni->ni_vap; const struct ieee80211_ie_htinfo *htinfo; struct ieee80211_channel *c; uint16_t w; int htflags, chanflags; if (ie[0] == IEEE80211_ELEMID_VENDOR) ie += 4; htinfo = (const struct ieee80211_ie_htinfo *) ie; ni->ni_htctlchan = htinfo->hi_ctrlchannel; ni->ni_ht2ndchan = SM(htinfo->hi_byte1, IEEE80211_HTINFO_2NDCHAN); w = LE_READ_2(&htinfo->hi_byte2); ni->ni_htopmode = SM(w, IEEE80211_HTINFO_OPMODE); w = LE_READ_2(&htinfo->hi_byte45); ni->ni_htstbc = SM(w, IEEE80211_HTINFO_BASIC_STBCMCS); /* * Handle 11n channel switch. Use the received HT ie's to * identify the right channel to use. If we cannot locate it * in the channel table then fallback to legacy operation. */ /* NB: honor operating mode constraint */ htflags = (vap->iv_flags_ext & IEEE80211_FEXT_HT) ? IEEE80211_CHAN_HT20 : 0; if ((htinfo->hi_byte1 & IEEE80211_HTINFO_TXWIDTH_2040) && (vap->iv_flags_ext & IEEE80211_FEXT_USEHT40)) { if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_ABOVE) htflags = IEEE80211_CHAN_HT40U; else if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_BELOW) htflags = IEEE80211_CHAN_HT40D; } chanflags = (ni->ni_chan->ic_flags &~ IEEE80211_CHAN_HT) | htflags; if (chanflags != ni->ni_chan->ic_flags) { c = ieee80211_find_channel(ic, ni->ni_chan->ic_freq, chanflags); if (c == NULL && (htflags & IEEE80211_CHAN_HT40)) { /* * No HT40 channel entry in our table; fall back * to HT20 operation. This should not happen. */ c = findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT20); IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, "no HT40 channel (freq %u), falling back to HT20", ni->ni_chan->ic_freq); /* XXX stat */ } if (c != NULL && c != ni->ni_chan) { IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, "switch station to HT%d channel %u/0x%x", IEEE80211_IS_CHAN_HT40(c) ? 40 : 20, c->ic_freq, c->ic_flags); ni->ni_chan = c; } /* NB: caller responsible for forcing any channel change */ } /* update node's tx channel width */ ni->ni_chw = IEEE80211_IS_CHAN_HT40(ni->ni_chan)? 40 : 20; } /* * Install received HT rate set by parsing the HT cap ie. */ int ieee80211_setup_htrates(struct ieee80211_node *ni, const uint8_t *ie, int flags) { struct ieee80211vap *vap = ni->ni_vap; const struct ieee80211_ie_htcap *htcap; struct ieee80211_htrateset *rs; int i; rs = &ni->ni_htrates; memset(rs, 0, sizeof(*rs)); if (ie != NULL) { if (ie[0] == IEEE80211_ELEMID_VENDOR) ie += 4; htcap = (const struct ieee80211_ie_htcap *) ie; for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) { if (isclr(htcap->hc_mcsset, i)) continue; if (rs->rs_nrates == IEEE80211_HTRATE_MAXSIZE) { IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, "WARNING, HT rate set too large; only " "using %u rates", IEEE80211_HTRATE_MAXSIZE); vap->iv_stats.is_rx_rstoobig++; break; } rs->rs_rates[rs->rs_nrates++] = i; } } return ieee80211_fix_rate(ni, (struct ieee80211_rateset *) rs, flags); } /* * Mark rates in a node's HT rate set as basic according * to the information in the supplied HT info ie. */ void ieee80211_setup_basic_htrates(struct ieee80211_node *ni, const uint8_t *ie) { const struct ieee80211_ie_htinfo *htinfo; struct ieee80211_htrateset *rs; int i, j; if (ie[0] == IEEE80211_ELEMID_VENDOR) ie += 4; htinfo = (const struct ieee80211_ie_htinfo *) ie; rs = &ni->ni_htrates; if (rs->rs_nrates == 0) { IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, "%s", "WARNING, empty HT rate set"); return; } for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) { if (isclr(htinfo->hi_basicmcsset, i)) continue; for (j = 0; j < rs->rs_nrates; j++) if ((rs->rs_rates[j] & IEEE80211_RATE_VAL) == i) rs->rs_rates[j] |= IEEE80211_RATE_BASIC; } } static void addba_timeout(void *arg) { struct ieee80211_tx_ampdu *tap = arg; /* XXX ? */ tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND; tap->txa_attempts++; } static void addba_start_timeout(struct ieee80211_tx_ampdu *tap) { /* XXX use CALLOUT_PENDING instead? */ callout_reset(&tap->txa_timer, ieee80211_addba_timeout, addba_timeout, tap); tap->txa_flags |= IEEE80211_AGGR_XCHGPEND; tap->txa_nextrequest = ticks + ieee80211_addba_timeout; } static void addba_stop_timeout(struct ieee80211_tx_ampdu *tap) { /* XXX use CALLOUT_PENDING instead? */ if (tap->txa_flags & IEEE80211_AGGR_XCHGPEND) { callout_stop(&tap->txa_timer); tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND; } } /* * Default method for requesting A-MPDU tx aggregation. * We setup the specified state block and start a timer * to wait for an ADDBA response frame. */ static int ieee80211_addba_request(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, int dialogtoken, int baparamset, int batimeout) { int bufsiz; /* XXX locking */ tap->txa_token = dialogtoken; tap->txa_flags |= IEEE80211_AGGR_IMMEDIATE; tap->txa_start = 0; bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); tap->txa_wnd = (bufsiz == 0) ? IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); addba_start_timeout(tap); return 1; } /* * Default method for processing an A-MPDU tx aggregation * response. We shutdown any pending timer and update the * state block according to the reply. */ static int ieee80211_addba_response(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, int status, int baparamset, int batimeout) { int bufsiz; /* XXX locking */ addba_stop_timeout(tap); if (status == IEEE80211_STATUS_SUCCESS) { bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); /* XXX override our request? */ tap->txa_wnd = (bufsiz == 0) ? IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); tap->txa_flags |= IEEE80211_AGGR_RUNNING; } else { /* mark tid so we don't try again */ tap->txa_flags |= IEEE80211_AGGR_NAK; } return 1; } /* * Default method for stopping A-MPDU tx aggregation. * Any timer is cleared and we drain any pending frames. */ static void ieee80211_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap) { /* XXX locking */ addba_stop_timeout(tap); if (tap->txa_flags & IEEE80211_AGGR_RUNNING) { /* XXX clear aggregation queue */ tap->txa_flags &= ~IEEE80211_AGGR_RUNNING; } tap->txa_attempts = 0; } /* * Process a received action frame using the default aggregation * policy. We intercept ADDBA-related frames and use them to * update our aggregation state. All other frames are passed up * for processing by ieee80211_recv_action. */ static void ieee80211_aggr_recv_action(struct ieee80211_node *ni, const uint8_t *frm, const uint8_t *efrm) { struct ieee80211com *ic = ni->ni_ic; struct ieee80211vap *vap = ni->ni_vap; const struct ieee80211_action *ia; struct ieee80211_rx_ampdu *rap; struct ieee80211_tx_ampdu *tap; uint8_t dialogtoken, policy; uint16_t baparamset, batimeout, baseqctl, code; uint16_t args[4]; int tid, ac, bufsiz; ia = (const struct ieee80211_action *) frm; switch (ia->ia_category) { case IEEE80211_ACTION_CAT_BA: switch (ia->ia_action) { case IEEE80211_ACTION_BA_ADDBA_REQUEST: dialogtoken = frm[2]; baparamset = LE_READ_2(frm+3); batimeout = LE_READ_2(frm+5); baseqctl = LE_READ_2(frm+7); tid = MS(baparamset, IEEE80211_BAPS_TID); bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, "recv ADDBA request: dialogtoken %u " "baparamset 0x%x (tid %d bufsiz %d) batimeout %d " "baseqctl %d:%d", dialogtoken, baparamset, tid, bufsiz, batimeout, MS(baseqctl, IEEE80211_BASEQ_START), MS(baseqctl, IEEE80211_BASEQ_FRAG)); rap = &ni->ni_rx_ampdu[tid]; /* Send ADDBA response */ args[0] = dialogtoken; /* * NB: We ack only if the sta associated with HT and * the ap is configured to do AMPDU rx (the latter * violates the 11n spec and is mostly for testing). */ if ((ni->ni_flags & IEEE80211_NODE_AMPDU_RX) && (vap->iv_flags_ext & IEEE80211_FEXT_AMPDU_RX)) { ampdu_rx_start(rap, bufsiz, MS(baseqctl, IEEE80211_BASEQ_START)); args[1] = IEEE80211_STATUS_SUCCESS; } else { IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, "reject ADDBA request: %s", ni->ni_flags & IEEE80211_NODE_AMPDU_RX ? "administratively disabled" : "not negotiated for station"); vap->iv_stats.is_addba_reject++; args[1] = IEEE80211_STATUS_UNSPECIFIED; } /* XXX honor rap flags? */ args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE | SM(tid, IEEE80211_BAPS_TID) | SM(rap->rxa_wnd, IEEE80211_BAPS_BUFSIZ) ; args[3] = 0; ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA, IEEE80211_ACTION_BA_ADDBA_RESPONSE, args); return; case IEEE80211_ACTION_BA_ADDBA_RESPONSE: dialogtoken = frm[2]; code = LE_READ_2(frm+3); baparamset = LE_READ_2(frm+5); tid = MS(baparamset, IEEE80211_BAPS_TID); bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); policy = MS(baparamset, IEEE80211_BAPS_POLICY); batimeout = LE_READ_2(frm+7); ac = TID_TO_WME_AC(tid); tap = &ni->ni_tx_ampdu[ac]; if ((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni->ni_macaddr, "ADDBA response", "no pending ADDBA, tid %d dialogtoken %u " "code %d", tid, dialogtoken, code); vap->iv_stats.is_addba_norequest++; return; } if (dialogtoken != tap->txa_token) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni->ni_macaddr, "ADDBA response", "dialogtoken mismatch: waiting for %d, " "received %d, tid %d code %d", tap->txa_token, dialogtoken, tid, code); vap->iv_stats.is_addba_badtoken++; return; } /* NB: assumes IEEE80211_AGGR_IMMEDIATE is 1 */ if (policy != (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni->ni_macaddr, "ADDBA response", "policy mismatch: expecting %s, " "received %s, tid %d code %d", tap->txa_flags & IEEE80211_AGGR_IMMEDIATE, policy, tid, code); vap->iv_stats.is_addba_badpolicy++; return; } #if 0 /* XXX we take MIN in ieee80211_addba_response */ if (bufsiz > IEEE80211_AGGR_BAWMAX) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni->ni_macaddr, "ADDBA response", "BA window too large: max %d, " "received %d, tid %d code %d", bufsiz, IEEE80211_AGGR_BAWMAX, tid, code); vap->iv_stats.is_addba_badbawinsize++; return; } #endif IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, "recv ADDBA response: dialogtoken %u code %d " "baparamset 0x%x (tid %d bufsiz %d) batimeout %d", dialogtoken, code, baparamset, tid, bufsiz, batimeout); ic->ic_addba_response(ni, tap, code, baparamset, batimeout); return; case IEEE80211_ACTION_BA_DELBA: baparamset = LE_READ_2(frm+2); code = LE_READ_2(frm+4); tid = MS(baparamset, IEEE80211_DELBAPS_TID); IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, "recv DELBA: baparamset 0x%x (tid %d initiator %d) " "code %d", baparamset, tid, MS(baparamset, IEEE80211_DELBAPS_INIT), code); if ((baparamset & IEEE80211_DELBAPS_INIT) == 0) { ac = TID_TO_WME_AC(tid); tap = &ni->ni_tx_ampdu[ac]; ic->ic_addba_stop(ni, tap); } else { rap = &ni->ni_rx_ampdu[tid]; ampdu_rx_stop(rap); } return; } break; } ieee80211_recv_action(ni, frm, efrm); } /* * Process a received 802.11n action frame. * Aggregation-related frames are assumed to be handled * already; we handle any other frames we can, otherwise * complain about being unsupported (with debugging). */ void ieee80211_recv_action(struct ieee80211_node *ni, const uint8_t *frm, const uint8_t *efrm) { struct ieee80211vap *vap = ni->ni_vap; const struct ieee80211_action *ia; int chw; ia = (const struct ieee80211_action *) frm; switch (ia->ia_category) { case IEEE80211_ACTION_CAT_BA: IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, "%s: BA action %d not implemented", __func__, ia->ia_action); vap->iv_stats.is_rx_mgtdiscard++; break; case IEEE80211_ACTION_CAT_HT: switch (ia->ia_action) { case IEEE80211_ACTION_HT_TXCHWIDTH: chw = frm[2] == IEEE80211_A_HT_TXCHWIDTH_2040 ? 40 : 20; IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, "%s: HT txchwidth, width %d%s", __func__, chw, ni->ni_chw != chw ? "*" : ""); if (chw != ni->ni_chw) { ni->ni_chw = chw; /* XXX notify on change */ } break; case IEEE80211_ACTION_HT_MIMOPWRSAVE: IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, "%s: HT MIMO PS", __func__); break; default: IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, "%s: HT action %d not implemented", __func__, ia->ia_action); vap->iv_stats.is_rx_mgtdiscard++; break; } break; default: IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, "%s: category %d not implemented", __func__, ia->ia_category); vap->iv_stats.is_rx_mgtdiscard++; break; } } /* * Transmit processing. */ /* * Check if A-MPDU should be requested/enabled for a stream. * We require a traffic rate above a per-AC threshold and we * also handle backoff from previous failed attempts. * * Drivers may override this method to bring in information * such as link state conditions in making the decision. */ static int ieee80211_ampdu_enable(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap) { struct ieee80211vap *vap = ni->ni_vap; if (tap->txa_avgpps < vap->iv_ampdu_mintraffic[tap->txa_ac]) return 0; /* XXX check rssi? */ if (tap->txa_attempts >= ieee80211_addba_maxtries && ticks < tap->txa_nextrequest) { /* * Don't retry too often; txa_nextrequest is set * to the minimum interval we'll retry after * ieee80211_addba_maxtries failed attempts are made. */ return 0; } IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, "%s: enable AMPDU on %s, avgpps %d pkts %d", __func__, ieee80211_wme_acnames[tap->txa_ac], tap->txa_avgpps, tap->txa_pkts); return 1; } /* * Request A-MPDU tx aggregation. Setup local state and * issue an ADDBA request. BA use will only happen after * the other end replies with ADDBA response. */ int ieee80211_ampdu_request(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap) { struct ieee80211com *ic = ni->ni_ic; uint16_t args[4]; int tid, dialogtoken; static int tokens = 0; /* XXX */ /* XXX locking */ if ((tap->txa_flags & IEEE80211_AGGR_SETUP) == 0) { /* do deferred setup of state */ callout_init(&tap->txa_timer, CALLOUT_MPSAFE); tap->txa_flags |= IEEE80211_AGGR_SETUP; } /* XXX hack for not doing proper locking */ tap->txa_flags &= ~IEEE80211_AGGR_NAK; dialogtoken = (tokens+1) % 63; /* XXX */ tid = WME_AC_TO_TID(tap->txa_ac); tap->txa_start = ni->ni_txseqs[tid]; tid = WME_AC_TO_TID(tap->txa_ac); args[0] = dialogtoken; args[1] = IEEE80211_BAPS_POLICY_IMMEDIATE | SM(tid, IEEE80211_BAPS_TID) | SM(IEEE80211_AGGR_BAWMAX, IEEE80211_BAPS_BUFSIZ) ; args[2] = 0; /* batimeout */ /* NB: do first so there's no race against reply */ if (!ic->ic_addba_request(ni, tap, dialogtoken, args[1], args[2])) { /* unable to setup state, don't make request */ IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni, "%s: could not setup BA stream for AC %d", __func__, tap->txa_ac); /* defer next try so we don't slam the driver with requests */ tap->txa_attempts = ieee80211_addba_maxtries; /* NB: check in case driver wants to override */ if (tap->txa_nextrequest <= ticks) tap->txa_nextrequest = ticks + ieee80211_addba_backoff; return 0; } tokens = dialogtoken; /* allocate token */ /* NB: after calling ic_addba_request so driver can set txa_start */ args[3] = SM(tap->txa_start, IEEE80211_BASEQ_START) | SM(0, IEEE80211_BASEQ_FRAG) ; return ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA, IEEE80211_ACTION_BA_ADDBA_REQUEST, args); } /* * Terminate an AMPDU tx stream. State is reclaimed * and the peer notified with a DelBA Action frame. */ void ieee80211_ampdu_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap) { struct ieee80211com *ic = ni->ni_ic; struct ieee80211vap *vap = ni->ni_vap; uint16_t args[4]; /* XXX locking */ if (IEEE80211_AMPDU_RUNNING(tap)) { IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, "%s: stop BA stream for AC %d", __func__, tap->txa_ac); vap->iv_stats.is_ampdu_stop++; ic->ic_addba_stop(ni, tap); args[0] = WME_AC_TO_TID(tap->txa_ac); args[1] = IEEE80211_DELBAPS_INIT; args[2] = 1; /* XXX reason code */ ieee80211_send_action(ni, IEEE80211_ACTION_CAT_BA, IEEE80211_ACTION_BA_DELBA, args); } else { IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, "%s: BA stream for AC %d not running", __func__, tap->txa_ac); vap->iv_stats.is_ampdu_stop_failed++; } } /* * Transmit a BAR frame to the specified node. The * BAR contents are drawn from the supplied aggregation * state associated with the node. */ int ieee80211_send_bar(struct ieee80211_node *ni, const struct ieee80211_tx_ampdu *tap) { #define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0) #define ADDSHORT(frm, v) do { \ frm[0] = (v) & 0xff; \ frm[1] = (v) >> 8; \ frm += 2; \ } while (0) struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; struct ieee80211_frame_min *wh; struct mbuf *m; uint8_t *frm; uint16_t barctl, barseqctl; int tid, ret; ieee80211_ref_node(ni); m = ieee80211_getmgtframe(&frm, ic->ic_headroom + sizeof(struct ieee80211_frame_min), sizeof(struct ieee80211_ba_request) ); if (m == NULL) senderr(ENOMEM, is_tx_nobuf); wh = mtod(m, struct ieee80211_frame_min *); wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_BAR; wh->i_fc[1] = 0; IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr); IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); tid = WME_AC_TO_TID(tap->txa_ac); barctl = (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE ? IEEE80211_BAPS_POLICY_IMMEDIATE : IEEE80211_BAPS_POLICY_DELAYED) | SM(tid, IEEE80211_BAPS_TID) | SM(tap->txa_wnd, IEEE80211_BAPS_BUFSIZ) ; barseqctl = SM(tap->txa_start, IEEE80211_BASEQ_START) | SM(0, IEEE80211_BASEQ_FRAG) ; ADDSHORT(frm, barctl); ADDSHORT(frm, barseqctl); m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); M_WME_SETAC(m, WME_AC_VO); IEEE80211_NODE_STAT(ni, tx_mgmt); /* XXX tx_ctl? */ IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, ni, "send bar frame (tid %u start %u) on channel %u", tid, tap->txa_start, ieee80211_chan2ieee(ic, ic->ic_curchan)); return ic->ic_raw_xmit(ni, m, NULL); bad: ieee80211_free_node(ni); return ret; #undef ADDSHORT #undef senderr } /* * Send an action management frame. The arguments are stuff * into a frame without inspection; the caller is assumed to * prepare them carefully (e.g. based on the aggregation state). */ int ieee80211_send_action(struct ieee80211_node *ni, int category, int action, uint16_t args[4]) { #define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0) #define ADDSHORT(frm, v) do { \ frm[0] = (v) & 0xff; \ frm[1] = (v) >> 8; \ frm += 2; \ } while (0) struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; struct mbuf *m; uint8_t *frm; uint16_t baparamset; int ret; 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); m = ieee80211_getmgtframe(&frm, ic->ic_headroom + sizeof(struct ieee80211_frame), sizeof(uint16_t) /* action+category */ /* XXX may action payload */ + sizeof(struct ieee80211_action_ba_addbaresponse) ); if (m == NULL) senderr(ENOMEM, is_tx_nobuf); *frm++ = category; *frm++ = action; switch (category) { case IEEE80211_ACTION_CAT_BA: switch (action) { case IEEE80211_ACTION_BA_ADDBA_REQUEST: IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, "send ADDBA request: dialogtoken %d " "baparamset 0x%x (tid %d) batimeout 0x%x baseqctl 0x%x", args[0], args[1], MS(args[1], IEEE80211_BAPS_TID), args[2], args[3]); *frm++ = args[0]; /* dialog token */ ADDSHORT(frm, args[1]); /* baparamset */ ADDSHORT(frm, args[2]); /* batimeout */ ADDSHORT(frm, args[3]); /* baseqctl */ break; case IEEE80211_ACTION_BA_ADDBA_RESPONSE: IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, "send ADDBA response: dialogtoken %d status %d " "baparamset 0x%x (tid %d) batimeout %d", args[0], args[1], args[2], MS(args[2], IEEE80211_BAPS_TID), args[3]); *frm++ = args[0]; /* dialog token */ ADDSHORT(frm, args[1]); /* statuscode */ ADDSHORT(frm, args[2]); /* baparamset */ ADDSHORT(frm, args[3]); /* batimeout */ break; case IEEE80211_ACTION_BA_DELBA: /* XXX */ baparamset = SM(args[0], IEEE80211_DELBAPS_TID) | args[1] ; ADDSHORT(frm, baparamset); ADDSHORT(frm, args[2]); /* reason code */ IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, "send DELBA action: tid %d, initiator %d reason %d", args[0], args[1], args[2]); break; default: goto badaction; } break; case IEEE80211_ACTION_CAT_HT: switch (action) { case IEEE80211_ACTION_HT_TXCHWIDTH: IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, "send HT txchwidth: width %d", IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? 40 : 20 ); *frm++ = IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? IEEE80211_A_HT_TXCHWIDTH_2040 : IEEE80211_A_HT_TXCHWIDTH_20; break; default: goto badaction; } break; default: badaction: IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, "%s: unsupported category %d action %d", __func__, category, action); senderr(EINVAL, is_tx_unknownmgt); /* NOTREACHED */ } m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION); bad: ieee80211_free_node(ni); if (m != NULL) m_freem(m); return ret; #undef ADDSHORT #undef senderr } /* * Construct the MCS bit mask for inclusion * in an HT information element. */ static void ieee80211_set_htrates(uint8_t *frm, const struct ieee80211_htrateset *rs) { int i; for (i = 0; i < rs->rs_nrates; i++) { int r = rs->rs_rates[i] & IEEE80211_RATE_VAL; if (r < IEEE80211_HTRATE_MAXSIZE) { /* XXX? */ /* NB: this assumes a particular implementation */ setbit(frm, r); } } } /* * Add body of an HTCAP information element. */ static uint8_t * ieee80211_add_htcap_body(uint8_t *frm, struct ieee80211_node *ni) { #define ADDSHORT(frm, v) do { \ frm[0] = (v) & 0xff; \ frm[1] = (v) >> 8; \ frm += 2; \ } while (0) struct ieee80211vap *vap = ni->ni_vap; uint16_t caps; int rxmax, density; /* HT capabilities */ caps = vap->iv_htcaps & 0xffff; /* * Note channel width depends on whether we are operating as * a sta or not. When operating as a sta we are generating * a request based on our desired configuration. Otherwise * we are operational and the channel attributes identify * how we've been setup (which might be different if a fixed * channel is specified). */ if (vap->iv_opmode == IEEE80211_M_STA) { /* override 20/40 use based on config */ if (vap->iv_flags_ext & IEEE80211_FEXT_USEHT40) caps |= IEEE80211_HTCAP_CHWIDTH40; else caps &= ~IEEE80211_HTCAP_CHWIDTH40; /* use advertised setting (XXX locally constraint) */ rxmax = MS(ni->ni_htparam, IEEE80211_HTCAP_MAXRXAMPDU); density = MS(ni->ni_htparam, IEEE80211_HTCAP_MPDUDENSITY); } else { /* override 20/40 use based on current channel */ if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) caps |= IEEE80211_HTCAP_CHWIDTH40; else caps &= ~IEEE80211_HTCAP_CHWIDTH40; rxmax = vap->iv_ampdu_rxmax; density = vap->iv_ampdu_density; } /* adjust short GI based on channel and config */ if ((vap->iv_flags_ext & IEEE80211_FEXT_SHORTGI20) == 0) caps &= ~IEEE80211_HTCAP_SHORTGI20; if ((vap->iv_flags_ext & IEEE80211_FEXT_SHORTGI40) == 0 || (caps & IEEE80211_HTCAP_CHWIDTH40) == 0) caps &= ~IEEE80211_HTCAP_SHORTGI40; ADDSHORT(frm, caps); /* HT parameters */ *frm = SM(rxmax, IEEE80211_HTCAP_MAXRXAMPDU) | SM(density, IEEE80211_HTCAP_MPDUDENSITY) ; frm++; /* pre-zero remainder of ie */ memset(frm, 0, sizeof(struct ieee80211_ie_htcap) - __offsetof(struct ieee80211_ie_htcap, hc_mcsset)); /* supported MCS set */ /* * XXX it would better to get the rate set from ni_htrates * so we can restrict it but for sta mode ni_htrates isn't * setup when we're called to form an AssocReq frame so for * now we're restricted to the default HT rate set. */ ieee80211_set_htrates(frm, &ieee80211_rateset_11n); frm += sizeof(struct ieee80211_ie_htcap) - __offsetof(struct ieee80211_ie_htcap, hc_mcsset); return frm; #undef ADDSHORT } /* * Add 802.11n HT capabilities information element */ uint8_t * ieee80211_add_htcap(uint8_t *frm, struct ieee80211_node *ni) { frm[0] = IEEE80211_ELEMID_HTCAP; frm[1] = sizeof(struct ieee80211_ie_htcap) - 2; return ieee80211_add_htcap_body(frm + 2, ni); } /* * Add Broadcom OUI wrapped standard HTCAP ie; this is * used for compatibility w/ pre-draft implementations. */ uint8_t * ieee80211_add_htcap_vendor(uint8_t *frm, struct ieee80211_node *ni) { frm[0] = IEEE80211_ELEMID_VENDOR; frm[1] = 4 + sizeof(struct ieee80211_ie_htcap) - 2; frm[2] = (BCM_OUI >> 0) & 0xff; frm[3] = (BCM_OUI >> 8) & 0xff; frm[4] = (BCM_OUI >> 16) & 0xff; frm[5] = BCM_OUI_HTCAP; return ieee80211_add_htcap_body(frm + 6, ni); } /* * Construct the MCS bit mask of basic rates * for inclusion in an HT information element. */ static void ieee80211_set_basic_htrates(uint8_t *frm, const struct ieee80211_htrateset *rs) { int i; for (i = 0; i < rs->rs_nrates; i++) { int r = rs->rs_rates[i] & IEEE80211_RATE_VAL; if ((rs->rs_rates[i] & IEEE80211_RATE_BASIC) && r < IEEE80211_HTRATE_MAXSIZE) { /* NB: this assumes a particular implementation */ setbit(frm, r); } } } /* * Update the HTINFO ie for a beacon frame. */ void ieee80211_ht_update_beacon(struct ieee80211vap *vap, struct ieee80211_beacon_offsets *bo) { #define PROTMODE (IEEE80211_HTINFO_OPMODE|IEEE80211_HTINFO_NONHT_PRESENT) const struct ieee80211_channel *bsschan = vap->iv_bss->ni_chan; struct ieee80211com *ic = vap->iv_ic; struct ieee80211_ie_htinfo *ht = (struct ieee80211_ie_htinfo *) bo->bo_htinfo; /* XXX only update on channel change */ ht->hi_ctrlchannel = ieee80211_chan2ieee(ic, bsschan); ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PROH; if (IEEE80211_IS_CHAN_HT40U(bsschan)) ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_ABOVE; else if (IEEE80211_IS_CHAN_HT40D(bsschan)) ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_BELOW; else ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_NONE; if (IEEE80211_IS_CHAN_HT40(bsschan)) ht->hi_byte1 |= IEEE80211_HTINFO_TXWIDTH_2040; /* protection mode */ ht->hi_byte2 = (ht->hi_byte2 &~ PROTMODE) | ic->ic_curhtprotmode; /* XXX propagate to vendor ie's */ #undef PROTMODE } /* * Add body of an HTINFO information element. * * NB: We don't use struct ieee80211_ie_htinfo because we can * be called to fillin both a standard ie and a compat ie that * has a vendor OUI at the front. */ static uint8_t * ieee80211_add_htinfo_body(uint8_t *frm, struct ieee80211_node *ni) { struct ieee80211com *ic = ni->ni_ic; /* pre-zero remainder of ie */ memset(frm, 0, sizeof(struct ieee80211_ie_htinfo) - 2); /* primary/control channel center */ *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan); frm[0] = IEEE80211_HTINFO_RIFSMODE_PROH; if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan)) frm[0] |= IEEE80211_HTINFO_2NDCHAN_ABOVE; else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan)) frm[0] |= IEEE80211_HTINFO_2NDCHAN_BELOW; else frm[0] |= IEEE80211_HTINFO_2NDCHAN_NONE; if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) frm[0] |= IEEE80211_HTINFO_TXWIDTH_2040; frm[1] = ic->ic_curhtprotmode; frm += 5; /* basic MCS set */ ieee80211_set_basic_htrates(frm, &ni->ni_htrates); frm += sizeof(struct ieee80211_ie_htinfo) - __offsetof(struct ieee80211_ie_htinfo, hi_basicmcsset); return frm; } /* * Add 802.11n HT information information element. */ uint8_t * ieee80211_add_htinfo(uint8_t *frm, struct ieee80211_node *ni) { frm[0] = IEEE80211_ELEMID_HTINFO; frm[1] = sizeof(struct ieee80211_ie_htinfo) - 2; return ieee80211_add_htinfo_body(frm + 2, ni); } /* * Add Broadcom OUI wrapped standard HTINFO ie; this is * used for compatibility w/ pre-draft implementations. */ uint8_t * ieee80211_add_htinfo_vendor(uint8_t *frm, struct ieee80211_node *ni) { frm[0] = IEEE80211_ELEMID_VENDOR; frm[1] = 4 + sizeof(struct ieee80211_ie_htinfo) - 2; frm[2] = (BCM_OUI >> 0) & 0xff; frm[3] = (BCM_OUI >> 8) & 0xff; frm[4] = (BCM_OUI >> 16) & 0xff; frm[5] = BCM_OUI_HTINFO; return ieee80211_add_htinfo_body(frm + 6, ni); } diff --git a/sys/net80211/ieee80211_output.c b/sys/net80211/ieee80211_output.c index b1488ca4aa20..9df35f36de22 100644 --- a/sys/net80211/ieee80211_output.c +++ b/sys/net80211/ieee80211_output.c @@ -1,2843 +1,2863 @@ /*- * Copyright (c) 2001 Atsushi Onoe * 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("$FreeBSD$"); #include "opt_inet.h" #include "opt_wlan.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef INET #include #include #include #include #endif #define ETHER_HEADER_COPY(dst, src) \ memcpy(dst, src, sizeof(struct ether_header)) static struct mbuf *ieee80211_encap_fastframe(struct ieee80211vap *, struct mbuf *m1, const struct ether_header *eh1, struct mbuf *m2, const struct ether_header *eh2); 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 /* * 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. */ void ieee80211_start(struct ifnet *ifp) { #define IS_DWDS(vap) \ (vap->iv_opmode == IEEE80211_M_WDS && \ (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0) struct ieee80211vap *vap = ifp->if_softc; struct ieee80211com *ic = vap->iv_ic; struct ifnet *parent = ic->ic_ifp; struct ieee80211_node *ni; struct mbuf *m; struct ether_header *eh; int error; /* NB: parent must be up and running */ if (!IFNET_IS_UP_RUNNING(parent)) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT, "%s: ignore queue, parent %s not up+running\n", __func__, parent->if_xname); /* XXX stat */ return; } if (vap->iv_state == IEEE80211_S_SLEEP) { /* * In power save, wakeup device for transmit. */ ieee80211_new_state(vap, IEEE80211_S_RUN, 0); return; } /* * 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) { IEEE80211_LOCK(ic); /* re-check under the com lock to avoid races */ if (vap->iv_state != IEEE80211_S_RUN) { 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++; ifp->if_drv_flags |= IFF_DRV_OACTIVE; IEEE80211_UNLOCK(ic); return; } IEEE80211_UNLOCK(ic); } for (;;) { IFQ_DEQUEUE(&ifp->if_snd, m); if (m == NULL) break; /* * Sanitize mbuf flags for net80211 use. We cannot * clear M_PWR_SAV because this 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); /* * 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 */ ifp->if_oerrors++; continue; } 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); continue; } 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); } } ni = ieee80211_find_txnode(vap, eh->ether_dhost); if (ni == NULL) { /* NB: ieee80211_find_txnode does stat+msg */ ifp->if_oerrors++; m_freem(m); continue; } /* XXX AUTH'd */ if (ni->ni_associd == 0) { /* * Destination is not associated; must special * case DWDS where we point iv_bss at the node * for the associated station. * XXX adhoc mode? */ if (ni != vap->iv_bss || IS_DWDS(vap)) { 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++; ifp->if_oerrors++; m_freem(m); ieee80211_free_node(ni); continue; } } 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? */ ieee80211_pwrsave(ni, m); ieee80211_free_node(ni); continue; } /* calculate priority so drivers can find the tx queue */ if (ieee80211_classify(ni, m)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT, eh->ether_dhost, NULL, "%s", "classification failure"); vap->iv_stats.is_tx_classify++; ifp->if_oerrors++; m_freem(m); ieee80211_free_node(ni); continue; } BPF_MTAP(ifp, m); /* 802.11 tx path */ /* * XXX When ni is associated with a WDS link then * the vap will be the WDS vap but ni_vap will point * to the ap vap the station associated to. Once * we handoff the packet to the driver the callback * to ieee80211_encap won't be able to tell if the * packet should be encapsulated for WDS or not (e.g. * multicast frames will not be handled correctly). * We hack this by marking the mbuf so ieee80211_encap * can do the right thing. */ if (vap->iv_opmode == IEEE80211_M_WDS) m->m_flags |= M_WDS; else m->m_flags &= ~M_WDS; /* * Stash the node pointer and hand the frame off to * the underlying device. Note that we do this after * any call to ieee80211_dwds_mcast because that code * uses any existing value for rcvif. */ m->m_pkthdr.rcvif = (void *)ni; /* XXX defer if_start calls? */ IFQ_HANDOFF(parent, m, error); if (error != 0) { /* NB: IFQ_HANDOFF reclaims mbuf */ ieee80211_free_node(ni); } else { ifp->if_opackets++; } ic->ic_lastdata = ticks; } #undef IS_DWDS } /* * 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. Note we locate the ieee80211com from * the ifnet using a spare field setup at attach time. This * will go away when the virtual ap support comes in. */ int ieee80211_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst, struct rtentry *rt0) { #define senderr(e) do { error = (e); goto bad;} while (0) struct ieee80211_node *ni = NULL; struct ieee80211vap *vap; struct ieee80211_frame *wh; int error; if (ifp->if_drv_flags & IFF_DRV_OACTIVE) { /* * Short-circuit requests if the vap is marked OACTIVE * as this is used when tearing down state to indicate * the vap may be gone. This can also happen because a * packet came down through ieee80211_start before the * vap entered RUN state in which case it's also 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; /* * 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, rt0); #ifdef MAC error = mac_check_ifnet_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 */ } /* 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 */ BPF_MTAP(ifp, m); /* * 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. */ return vap->iv_ic->ic_raw_xmit(ni, m, (const struct ieee80211_bpf_params *)(dst->sa_len ? dst->sa_data : NULL)); bad: if (m != NULL) m_freem(m); if (ni != NULL) ieee80211_free_node(ni); return error; #undef senderr } /* * Set the direction field and address fields of an outgoing * non-QoS 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. */ static void ieee80211_send_setup( struct ieee80211_node *ni, struct ieee80211_frame *wh, int type, 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) wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | type; if ((type & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_DATA) { struct ieee80211vap *vap = ni->ni_vap; 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_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); IEEE80211_ADDR_COPY(wh->i_addr3, bssid); } *(uint16_t *)&wh->i_dur[0] = 0; /* XXX probe response use per-vap seq#? */ /* NB: use non-QoS tid */ *(uint16_t *)&wh->i_seq[0] = htole16(ni->ni_txseqs[IEEE80211_NONQOS_TID] << IEEE80211_SEQ_SEQ_SHIFT); ni->ni_txseqs[IEEE80211_NONQOS_TID]++; #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 ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; struct ieee80211_frame *wh; 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]); vap->iv_stats.is_tx_badstate++; ieee80211_free_node(ni); m_freem(m); return EIO; /* XXX */ } M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT); if (m == NULL) { ieee80211_free_node(ni); return ENOMEM; } wh = mtod(m, struct ieee80211_frame *); ieee80211_send_setup(ni, wh, IEEE80211_FC0_TYPE_MGT | type, vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid); if ((m->m_flags & M_LINK0) != 0 && ni->ni_challenge != NULL) { m->m_flags &= ~M_LINK0; IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr1, "encrypting frame (%s)", __func__); wh->i_fc[1] |= IEEE80211_FC1_WEP; } if (type != IEEE80211_FC0_SUBTYPE_PROBE_RESP) { /* NB: force non-ProbeResp frames to the highest queue */ M_WME_SETAC(m, WME_AC_VO); } else M_WME_SETAC(m, WME_AC_BE); #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_chan2ieee(ic, ic->ic_curchan)); } #endif IEEE80211_NODE_STAT(ni, tx_mgmt); return ic->ic_raw_xmit(ni, m, NULL); } /* * Send a null data frame to the specified node. * * 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; 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 */ } m = m_gethdr(M_NOWAIT, MT_HEADER); if (m == NULL) { /* XXX debug msg */ ieee80211_unref_node(&ni); vap->iv_stats.is_tx_nobuf++; return ENOMEM; } MH_ALIGN(m, sizeof(struct ieee80211_frame)); wh = mtod(m, struct ieee80211_frame *); ieee80211_send_setup(ni, wh, IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_NODATA, 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; m->m_len = m->m_pkthdr.len = sizeof(struct ieee80211_frame); } else { /* NB: 4-address frame */ m->m_len = m->m_pkthdr.len = sizeof(struct ieee80211_frame_addr4); } M_WME_SETAC(m, WME_AC_BE); IEEE80211_NODE_STAT(ni, tx_data); IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, ni, "send null data frame on channel %u, pwr mgt %s", ieee80211_chan2ieee(ic, ic->ic_curchan), wh->i_fc[1] & IEEE80211_FC1_PWR_MGT ? "ena" : "dis"); return ic->ic_raw_xmit(ni, m, NULL); } /* * 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)); } #ifdef INET if (eh->ether_type == htons(ETHERTYPE_IP)) { uint8_t tos; /* * IP frame, map the DSCP bits from the TOS field. */ /* XXX m_copydata may be too slow for fast path */ /* 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 */ d_wme_ac = WME_AC_BE; #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. */ static 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 %zu\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 ieee80211_node *ni, struct mbuf *m) { #define WH4(wh) ((struct ieee80211_frame_addr4 *)(wh)) struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; struct ether_header eh; struct ieee80211_frame *wh; struct ieee80211_key *key; struct llc *llc; int hdrsize, hdrspace, datalen, addqos, txfrag, isff, is4addr; /* * 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. */ addqos = (ni->ni_flags & (IEEE80211_NODE_QOS|IEEE80211_NODE_HT)) && (m->m_flags & M_EAPOL) == 0; if (addqos) hdrsize = sizeof(struct ieee80211_qosframe); else hdrsize = sizeof(struct ieee80211_frame); /* * 4-address frames need to be generated for: * o packets sent through a WDS vap (M_WDS || IEEE80211_M_WDS) * o packets relayed by a station operating with dynamic WDS * (IEEE80211_M_STA+IEEE80211_F_DWDS and src address) */ is4addr = (m->m_flags & M_WDS) || vap->iv_opmode == IEEE80211_M_WDS || /* XXX redundant? */ (vap->iv_opmode == IEEE80211_M_STA && (vap->iv_flags & IEEE80211_F_DWDS) && !IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr)); if (is4addr) hdrsize += IEEE80211_ADDR_LEN; /* * Honor driver DATAPAD requirement. */ if (ic->ic_flags & IEEE80211_F_DATAPAD) hdrspace = roundup(hdrsize, sizeof(uint32_t)); else hdrspace = hdrsize; if ((isff = m->m_flags & M_FF) != 0) { struct mbuf *m2; struct ether_header eh2; /* * Fast frame encapsulation. There must be two packets * chained with m_nextpkt. We do header adjustment for * each, add the tunnel encapsulation, and then concatenate * the mbuf chains to form a single frame for transmission. */ m2 = m->m_nextpkt; if (m2 == NULL) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, "%s: only one frame\n", __func__); goto bad; } m->m_nextpkt = NULL; /* * Include fast frame headers in adjusting header * layout; this allocates space according to what * ieee80211_encap_fastframe will do. */ m = ieee80211_mbuf_adjust(vap, hdrspace + sizeof(struct llc) + sizeof(uint32_t) + 2 + sizeof(struct ether_header), key, m); if (m == NULL) { /* NB: ieee80211_mbuf_adjust handles msgs+statistics */ m_freem(m2); goto bad; } /* * Copy second frame's Ethernet header out of line * and adjust for encapsulation headers. Note that * we make room for padding in case there isn't room * at the end of first frame. */ KASSERT(m2->m_len >= sizeof(eh2), ("no ethernet header!")); ETHER_HEADER_COPY(&eh2, mtod(m2, caddr_t)); m2 = ieee80211_mbuf_adjust(vap, ATH_FF_MAX_HDR_PAD + sizeof(struct ether_header), NULL, m2); if (m2 == NULL) { /* NB: ieee80211_mbuf_adjust handles msgs+statistics */ goto bad; } m = ieee80211_encap_fastframe(vap, m, &eh, m2, &eh2); if (m == NULL) goto bad; } else { /* * Normal frame. */ m = ieee80211_mbuf_adjust(vap, hdrspace, 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; } datalen = m->m_pkthdr.len; /* NB: w/o 802.11 header */ M_PREPEND(m, hdrspace, M_DONTWAIT); 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; 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; case IEEE80211_M_MONITOR: case IEEE80211_M_WDS: /* NB: is4addr should always be true */ goto bad; } if (m->m_flags & M_MORE_DATA) wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA; if (addqos) { uint8_t *qos; int ac, tid; if (is4addr) { qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos; } else 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; /* * 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_ext & IEEE80211_FEXT_AMPDU_TX)) { struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[ac]; ieee80211_txampdu_count_packet(tap); if (IEEE80211_AMPDU_RUNNING(tap)) { /* * Operational, mark frame for aggregation. + * + * NB: We support only immediate BA's for + * AMPDU which means we set the QoS control + * field to "normal ack" (0) to get "implicit + * block ack" behaviour. */ - qos[0] |= IEEE80211_QOS_ACKPOLICY_BA; + 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 works even when BA marked above */ if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[ac].wmep_noackPolicy) qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK; qos[1] = 0; wh->i_fc[0] |= IEEE80211_FC0_SUBTYPE_QOS; - *(uint16_t *)wh->i_seq = - htole16(ni->ni_txseqs[tid] << IEEE80211_SEQ_SEQ_SHIFT); + 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 + */ + *(uint16_t *)wh->i_seq = + htole16(ni->ni_txseqs[tid] << IEEE80211_SEQ_SEQ_SHIFT); + ni->ni_txseqs[tid]++; + } ni->ni_txseqs[tid]++; } else { *(uint16_t *)wh->i_seq = htole16(ni->ni_txseqs[IEEE80211_NONQOS_TID] << IEEE80211_SEQ_SEQ_SHIFT); ni->ni_txseqs[IEEE80211_NONQOS_TID]++; } /* 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) && !isff); /* NB: don't fragment ff's */ 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_WEP; 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; IEEE80211_NODE_STAT(ni, tx_data); if (IEEE80211_IS_MULTICAST(wh->i_addr1)) IEEE80211_NODE_STAT(ni, tx_mcast); else IEEE80211_NODE_STAT(ni, tx_ucast); IEEE80211_NODE_STAT_ADD(ni, tx_bytes, datalen); /* XXX fragmented frames not handled */ if (bpf_peers_present(vap->iv_rawbpf)) bpf_mtap(vap->iv_rawbpf, m); return m; bad: if (m != NULL) m_freem(m); return NULL; #undef WH4 } /* * 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). */ static struct mbuf * ieee80211_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_DONTWAIT); 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; } /* * Do fast frame tunnel encapsulation. The two frames and * Ethernet headers are supplied. The caller is assumed to * have arrange for space in the mbuf chains for encapsulating * headers (to avoid major mbuf fragmentation). * * The encapsulated frame is returned or NULL if there is a * problem (should not happen). */ static struct mbuf * ieee80211_encap_fastframe(struct ieee80211vap *vap, struct mbuf *m1, const struct ether_header *eh1, struct mbuf *m2, const struct ether_header *eh2) { struct llc *llc; struct mbuf *m; int pad; /* * First, each frame gets a standard encapsulation. */ m1 = ieee80211_encap1(vap, m1, eh1); if (m1 == NULL) { m_freem(m2); return NULL; } m2 = ieee80211_encap1(vap, m2, eh2); if (m2 == NULL) { m_freem(m1); return NULL; } /* * Pad leading frame to a 4-byte boundary. If there * is space at the end of the first frame, put it * there; otherwise prepend to the front of the second * frame. We know doing the second will always work * because we reserve space above. We prefer appending * as this typically has better DMA alignment properties. */ for (m = m1; m->m_next != NULL; m = m->m_next) ; pad = roundup2(m1->m_pkthdr.len, 4) - m1->m_pkthdr.len; if (pad) { if (M_TRAILINGSPACE(m) < pad) { /* prepend to second */ m2->m_data -= pad; m2->m_len += pad; m2->m_pkthdr.len += pad; } else { /* append to first */ m->m_len += pad; m1->m_pkthdr.len += pad; } } /* * Now, stick 'em together and prepend the tunnel headers; * first the Atheros tunnel header (all zero for now) and * then a special fast frame LLC. * * XXX optimize by prepending together */ m->m_next = m2; /* NB: last mbuf from above */ m1->m_pkthdr.len += m2->m_pkthdr.len; M_PREPEND(m1, sizeof(uint32_t)+2, M_DONTWAIT); if (m1 == NULL) { /* XXX cannot happen */ IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, "%s: no space for tunnel header\n", __func__); vap->iv_stats.is_tx_nobuf++; return NULL; } memset(mtod(m1, void *), 0, sizeof(uint32_t)+2); M_PREPEND(m1, sizeof(struct llc), M_DONTWAIT); if (m1 == NULL) { /* XXX cannot happen */ IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, "%s: no space for llc header\n", __func__); vap->iv_stats.is_tx_nobuf++; return NULL; } llc = mtod(m1, struct llc *); llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP; llc->llc_control = LLC_UI; llc->llc_snap.org_code[0] = ATH_FF_SNAP_ORGCODE_0; llc->llc_snap.org_code[1] = ATH_FF_SNAP_ORGCODE_1; llc->llc_snap.org_code[2] = ATH_FF_SNAP_ORGCODE_2; llc->llc_snap.ether_type = htons(ATH_FF_ETH_TYPE); vap->iv_stats.is_ff_encap++; return m1; } /* * 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 ieee80211_frame *wh, *whf; struct mbuf *m, *prev, *next; u_int totalhdrsize, fragno, fragsize, off, remainder, payload; KASSERT(m0->m_nextpkt == NULL, ("mbuf already chained?")); KASSERT(m0->m_pkthdr.len > mtu, ("pktlen %u mtu %u", m0->m_pkthdr.len, mtu)); 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 = hdrsize + 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_DONTWAIT, MT_DATA, M_PKTHDR); else m = m_gethdr(M_DONTWAIT, 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). */ whf = mtod(m, struct ieee80211_frame *); memcpy(whf, wh, hdrsize); *(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 *) + hdrsize); m->m_len = hdrsize + payload; m->m_pkthdr.len = hdrsize + 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); 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 */ for (m = m0->m_nextpkt; m != NULL; m = next) { next = m->m_nextpkt; m->m_nextpkt = NULL; /* XXX paranoid */ m_freem(m); } m0->m_nextpkt = NULL; return 0; } /* * Add a supported rates element id to a frame. */ static 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. */ static 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. */ static 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 { \ frm[0] = (v) & 0xff; \ frm[1] = (v) >> 8; \ 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. */ static 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 { \ frm[0] = (v) & 0xff; \ frm[1] = (v) >> 8; \ 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 #define ATH_OUI_BYTES 0x00, 0x03, 0x7f /* * Add a WME information element to a frame. */ static uint8_t * ieee80211_add_ath(uint8_t *frm, uint8_t caps, uint16_t defkeyix) { static const struct ieee80211_ath_ie info = { .ath_id = IEEE80211_ELEMID_VENDOR, .ath_len = sizeof(struct ieee80211_ath_ie) - 2, .ath_oui = { ATH_OUI_BYTES }, .ath_oui_type = ATH_OUI_TYPE, .ath_oui_subtype= ATH_OUI_SUBTYPE, .ath_version = ATH_OUI_VERSION, }; struct ieee80211_ath_ie *ath = (struct ieee80211_ath_ie *) frm; memcpy(frm, &info, sizeof(info)); ath->ath_capability = caps; ath->ath_defkeyix[0] = (defkeyix & 0xff); ath->ath_defkeyix[1] = ((defkeyix >> 8) & 0xff); return frm + sizeof(info); } #undef ATH_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 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_CHANSWITCHANN; 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) 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); } /* * 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; struct ieee80211_frame *wh; const struct ieee80211_rateset *rs; struct mbuf *m; uint8_t *frm; 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); if (vap->iv_flags & IEEE80211_F_WPA2) { if (vap->iv_rsn_ie != NULL) frm = add_ie(frm, vap->iv_rsn_ie); /* XXX else complain? */ } frm = ieee80211_add_xrates(frm, rs); if (vap->iv_flags & IEEE80211_F_WPA1) { if (vap->iv_wpa_ie != NULL) frm = add_ie(frm, vap->iv_wpa_ie); /* XXX else complain? */ } 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 *); M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT); if (m == NULL) return ENOMEM; wh = mtod(m, struct ieee80211_frame *); ieee80211_send_setup(ni, wh, IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ, sa, da, bssid); /* XXX power management? */ 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); return ic->ic_raw_xmit(ni, m, NULL); } /* * Calculate capability information for mgt frames. */ static uint16_t 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 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); 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__); m->m_flags |= M_LINK0; /* WEP-encrypt, please */ } } 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)", 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) + sizeof(struct ieee80211_ath_ie) + (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); if (vap->iv_flags & IEEE80211_F_WPA2) { if (vap->iv_rsn_ie != NULL) frm = add_ie(frm, vap->iv_rsn_ie); /* XXX else complain? */ } 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); } if ((vap->iv_flags_ext & IEEE80211_FEXT_HT) && ni->ni_ies.htcap_ie != NULL && ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_HTCAP) frm = ieee80211_add_htcap(frm, ni); if (vap->iv_flags & IEEE80211_F_WPA1) { if (vap->iv_wpa_ie != NULL) frm = add_ie(frm, vap->iv_wpa_ie); /* XXX else complain */ } if ((ic->ic_flags & IEEE80211_F_WME) && ni->ni_ies.wme_ie != NULL) frm = ieee80211_add_wme_info(frm, &ic->ic_wme); if ((vap->iv_flags_ext & IEEE80211_FEXT_HT) && ni->ni_ies.htcap_ie != NULL && ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_VENDOR) frm = ieee80211_add_htcap_vendor(frm, ni); 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 ? vap->iv_def_txkey : 0x7fff); 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) + sizeof(struct ieee80211_ath_ie) + (vap->iv_appie_assocresp != NULL ? vap->iv_appie_assocresp->ie_len : 0) ); if (m == NULL) senderr(ENOMEM, is_tx_nobuf); capinfo = 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); } if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS)) frm = ieee80211_add_ath(frm, IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS), ni->ni_ath_defkeyix); 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)", 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 */ } return ieee80211_mgmt_output(ni, m, type); 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) */ 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) + 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) + sizeof(struct ieee80211_ath_ie) + (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 = 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 (IEEE80211_IS_CHAN_ANYG(bss->ni_chan)) frm = ieee80211_add_erp(frm, ic); frm = ieee80211_add_xrates(frm, rs); if (vap->iv_flags & IEEE80211_F_WPA2) { if (vap->iv_rsn_ie != NULL) frm = add_ie(frm, vap->iv_rsn_ie); /* XXX else complain? */ } /* * 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); } if (vap->iv_flags & IEEE80211_F_WPA1) { if (vap->iv_wpa_ie != NULL) frm = add_ie(frm, vap->iv_wpa_ie); /* XXX else complain? */ } 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_ext & IEEE80211_FEXT_HTCOMPAT) && legacy != IEEE80211_SEND_LEGACY_11B) { frm = ieee80211_add_htcap_vendor(frm, bss); frm = ieee80211_add_htinfo_vendor(frm, bss); } if (bss->ni_ies.ath_ie != NULL && legacy != IEEE80211_SEND_LEGACY_11B) frm = ieee80211_add_ath(frm, bss->ni_ath_flags, bss->ni_ath_defkeyix); if (vap->iv_appie_proberesp != NULL) frm = add_appie(frm, vap->iv_appie_proberesp); 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; 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_DONTWAIT); KASSERT(m != NULL, ("no room for header")); wh = mtod(m, struct ieee80211_frame *); ieee80211_send_setup(bss, wh, IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP, vap->iv_myaddr, da, bss->ni_bssid); /* XXX power management? */ 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); return ic->ic_raw_xmit(bss, m, NULL); } /* * 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_DONTWAIT, 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_DONTWAIT, 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 ieee80211_node *ni = arg; struct ieee80211vap *vap = ni->ni_vap; 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(vap, IEEE80211_S_SCAN, IEEE80211_SCAN_FAIL_TIMEOUT); } } 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, ni); } static void ieee80211_beacon_construct(struct mbuf *m, uint8_t *frm, struct ieee80211_beacon_offsets *bo, struct ieee80211_node *ni) { struct ieee80211vap *vap = ni->ni_vap; 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] 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 = 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) { 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 (IEEE80211_IS_CHAN_ANYG(ni->ni_chan)) { bo->bo_erp = frm; frm = ieee80211_add_erp(frm, ic); } frm = ieee80211_add_xrates(frm, rs); if (vap->iv_flags & IEEE80211_F_WPA2) { if (vap->iv_rsn_ie != NULL) frm = add_ie(frm, vap->iv_rsn_ie); /* XXX else complain */ } if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) { frm = ieee80211_add_htcap(frm, ni); bo->bo_htinfo = frm; frm = ieee80211_add_htinfo(frm, ni); } if (vap->iv_flags & IEEE80211_F_WPA1) { if (vap->iv_wpa_ie != NULL) frm = add_ie(frm, vap->iv_wpa_ie); /* XXX else complain */ } 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_ext & IEEE80211_FEXT_HTCOMPAT)) { frm = ieee80211_add_htcap_vendor(frm, ni); frm = ieee80211_add_htinfo_vendor(frm, ni); } 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); } 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 ieee80211_beacon_offsets *bo) { 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] 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 */ + 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) + 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, bo, ni); M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT); 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 ieee80211_beacon_offsets *bo, struct mbuf *m, int mcast) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; int len_changed = 0; uint16_t capinfo; 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), bo, ni); /* XXX do WME aggressive mode processing? */ IEEE80211_UNLOCK(ic); return 1; /* just assume length changed */ } /* XXX faster to recalculate entirely or just changes? */ capinfo = 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); } if (vap->iv_opmode == IEEE80211_M_HOSTAP) { /* 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; bo->bo_appie += adjust; bo->bo_wme += adjust; bo->bo_csa += 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_wme += sizeof(*csa); bo->bo_appie += sizeof(*csa); bo->bo_csa_trailer_len += 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 (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); } } 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; } diff --git a/sys/net80211/ieee80211_sta.c b/sys/net80211/ieee80211_sta.c index af25bb658c65..d98c6dda9706 100644 --- a/sys/net80211/ieee80211_sta.c +++ b/sys/net80211/ieee80211_sta.c @@ -1,1647 +1,1643 @@ /*- * 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 #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 *, int rssi, int noise, uint32_t rstamp); static void sta_recv_mgmt(struct ieee80211_node *, struct mbuf *, int subtype, int rssi, int noise, uint32_t rstamp); 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_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; KASSERT((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_DEBUG, "beacon miss, mode %u state %s\n", vap->iv_opmode, ieee80211_state_name[vap->iv_state]); 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; } vap->iv_bmiss_count = 0; vap->iv_stats.is_beacon_miss++; if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { /* * 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); /* * 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; } } /* * 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 */ 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: goto invalid; } 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_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_RUN: switch (arg & 0xff) { case IEEE80211_FC0_SUBTYPE_AUTH: IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, 2); vap->iv_state = ostate; /* 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: 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: ieee80211_sta_pwrsave(vap, 0); break; default: goto invalid; } ieee80211_sync_curchan(ic); if (ostate != IEEE80211_S_RUN && (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 * ni->ni_intval); vap->iv_swbmiss_count = 0; callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, ieee80211_swbmiss, 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); break; case IEEE80211_S_SLEEP: ieee80211_sta_pwrsave(vap, 0); break; default: invalid: IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, "%s: invalid 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, int rssi, int noise, uint32_t rstamp) { #define SEQ_LEQ(a,b) ((int)((a)-(b)) <= 0) #define HAS_SEQ(type) ((type & 0x4) == 0) 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; uint8_t dir, type, subtype, qos; uint8_t *bssid; uint16_t rxseq; - if (m->m_flags & M_AMPDU) { + if (m->m_flags & M_AMPDU_MPDU) { /* * Fastpath for A-MPDU reorder q resubmission. Frames - * w/ M_AMPDU 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 flag and we can bypass most of the - * normal processing. + * 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; need_tap = 1; /* mbuf need to be tapped. */ 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 %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) { 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; } IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); ni->ni_noise = noise; ni->ni_rstamp = rstamp; 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++; rxseq = le16toh(*(uint16_t *)wh->i_seq); if ((ni->ni_flags & IEEE80211_NODE_HT) == 0 && (wh->i_fc[1] & IEEE80211_FC1_RETRY) && SEQ_LEQ(rxseq, ni->ni_rxseqs[tid])) { /* duplicate, discard */ IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, bssid, "duplicate", "seqno <%u,%u> fragno <%u,%u> tid %u", rxseq >> IEEE80211_SEQ_SEQ_SHIFT, ni->ni_rxseqs[tid] >> IEEE80211_SEQ_SEQ_SHIFT, rxseq & IEEE80211_SEQ_FRAG_MASK, ni->ni_rxseqs[tid] & IEEE80211_SEQ_FRAG_MASK, tid); vap->iv_stats.is_rx_dup++; IEEE80211_NODE_STAT(ni, rx_dup); goto out; } ni->ni_rxseqs[tid] = rxseq; } } 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. The station must be - * associated and negotiated HT. The frame must be - * a QoS frame (not QoS null data) and not previously - * processed for A-MPDU re-ordering. If the frame is - * to be processed directly then ieee80211_ampdu_reorder + * 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 ((ni->ni_flags & IEEE80211_NODE_HT) && - subtype == IEEE80211_FC0_SUBTYPE_QOS && + 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_WEP) { 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_WEP; } 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 (bpf_peers_present(vap->iv_rawbpf)) bpf_mtap(vap->iv_rawbpf, 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 if ((ni->ni_ath_flags & IEEE80211_NODE_FF) && #define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc)) m->m_pkthdr.len >= 3*FF_LLC_SIZE) { struct llc *llc; /* * Check for fast-frame tunnel encapsulation. */ if (m->m_len < FF_LLC_SIZE && (m = m_pullup(m, FF_LLC_SIZE)) == NULL) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, "fast-frame", "%s", "m_pullup(llc) failed"); vap->iv_stats.is_rx_tooshort++; return IEEE80211_FC0_TYPE_DATA; } llc = (struct llc *)(mtod(m, uint8_t *) + sizeof(struct ether_header)); if (llc->llc_snap.ether_type == htons(ATH_FF_ETH_TYPE)) { m_adj(m, FF_LLC_SIZE); m = ieee80211_decap_fastframe(ni, m); if (m == NULL) return IEEE80211_FC0_TYPE_DATA; } } #undef FF_LLC_SIZE 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], ether_sprintf(wh->i_addr2), rssi); } #endif if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 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], "%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_WEP; } if (bpf_peers_present(vap->iv_rawbpf)) bpf_mtap(vap->iv_rawbpf, m); vap->iv_recv_mgmt(ni, m, subtype, rssi, noise, rstamp); m_freem(m); return IEEE80211_FC0_TYPE_MGT; 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, NULL, "bad frame type 0x%x", type); /* should not come here */ break; } err: ifp->if_ierrors++; out: if (m != NULL) { if (bpf_peers_present(vap->iv_rawbpf) && need_tap) bpf_mtap(vap->iv_rawbpf, m); m_freem(m); } return type; #undef SEQ_LEQ } static void sta_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh, int rssi, int noise, uint32_t rstamp, 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 noise, uint32_t rstamp, 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) { 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); } static 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 = LE_READ_2(frm+2); frm += 4; } wme->wme_wmeChanParams.cap_info = qosinfo; return 1; #undef MS } static int ieee80211_parse_athparams(struct ieee80211_node *ni, uint8_t *frm, const struct ieee80211_frame *wh) { struct ieee80211vap *vap = ni->ni_vap; const struct ieee80211_ath_ie *ath; u_int len = frm[1]; int capschanged; uint16_t defkeyix; if (len < sizeof(struct ieee80211_ath_ie)-2) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_SUPERG, wh, "Atheros", "too short, len %u", len); return -1; } ath = (const struct ieee80211_ath_ie *)frm; capschanged = (ni->ni_ath_flags != ath->ath_capability); defkeyix = LE_READ_2(ath->ath_defkeyix); if (capschanged || defkeyix != ni->ni_ath_defkeyix) { ni->ni_ath_flags = ath->ath_capability; ni->ni_ath_defkeyix = defkeyix; IEEE80211_NOTE(vap, IEEE80211_MSG_SUPERG, ni, "ath ie change: new caps 0x%x defkeyix 0x%x", ni->ni_ath_flags, ni->ni_ath_defkeyix); } if (IEEE80211_ATH_CAP(vap, ni, ATHEROS_CAP_TURBO_PRIME)) { uint16_t curflags, newflags; /* * Check for turbo mode switch. Calculate flags * for the new mode and effect the switch. */ newflags = curflags = vap->iv_ic->ic_bsschan->ic_flags; /* NB: BOOST is not in ic_flags, so get it from the ie */ if (ath->ath_capability & ATHEROS_CAP_BOOST) newflags |= IEEE80211_CHAN_TURBO; else newflags &= ~IEEE80211_CHAN_TURBO; if (newflags != curflags) ieee80211_dturbo_switch(vap, newflags); } return capschanged; } /* * 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? */ 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 && !IEEE80211_IS_CHAN_DTURBO(ic->ic_curchan) && time_after(ticks, ic->ic_lastscan + vap->iv_bgscanintvl) && time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)); } static void sta_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, int rssi, int noise, uint32_t rstamp) { #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_frame *wh; uint8_t *frm, *efrm; uint8_t *rates, *xrates, *wme, *htcap, *htinfo; 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: case IEEE80211_FC0_SUBTYPE_BEACON: { struct ieee80211_scanparams scan; /* * 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), or * Frames otherwise received are discarded. */ if (!((ic->ic_flags & IEEE80211_F_SCAN) || ni->ni_associd)) { vap->iv_stats.is_rx_mgtdiscard++; return; } /* XXX probe response in sta mode when !scanning? */ if (ieee80211_parse_beacon(ni, m0, &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); /* * 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); if (scan.ath != NULL) ieee80211_parse_athparams(ni, scan.ath, wh); if (scan.htcap != NULL && scan.htinfo != NULL) { ieee80211_parse_htcap(ni, scan.htcap); ieee80211_parse_htinfo(ni, scan.htinfo); /* XXX state changes? */ } if (scan.tim != NULL) { struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *) scan.tim; #if 0 int aid = IEEE80211_AID(ni->ni_associd); int ix = aid / NBBY; int min = tim->tim_bitctl &~ 1; int max = tim->tim_len + min - 4; if ((tim->tim_bitctl&1) || (min <= ix && ix <= max && isset(tim->tim_bitmap - min, aid))) { /* * XXX Do not let bg scan kick off * we are expecting data. */ ic->ic_lastdata = ticks; ieee80211_sta_pwrsave(vap, 0); } #endif ni->ni_dtim_count = tim->tim_count; ni->ni_dtim_period = tim->tim_period; } /* * 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, &scan, wh, subtype, rssi, noise, rstamp); } 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); } 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, &scan, wh, subtype, rssi, noise, rstamp); 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, noise, rstamp, seq, status); else if (algo == IEEE80211_AUTH_ALG_OPEN) sta_auth_open(ni, wh, rssi, noise, rstamp, 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_ext & IEEE80211_FEXT_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) htcap = 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_ext & IEEE80211_FEXT_HT)) { ieee80211_ht_node_init(ni, htcap); ieee80211_parse_htinfo(ni, htinfo); ieee80211_setup_htrates(ni, htcap, IEEE80211_F_JOIN | IEEE80211_F_DOBRS); ieee80211_setup_basic_htrates(ni, htinfo); } /* * 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", 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)" : "", 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)", 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)", reason); ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); break; } case IEEE80211_FC0_SUBTYPE_ACTION: if (vap->iv_state == IEEE80211_S_RUN) { if (ieee80211_parse_action(ni, m0) == 0) ic->ic_recv_action(ni, frm, efrm); } else vap->iv_stats.is_rx_mgtdiscard++; break; case IEEE80211_FC0_SUBTYPE_PROBE_REQ: case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: vap->iv_stats.is_rx_mgtdiscard++; return; 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 } diff --git a/sys/net80211/ieee80211_wds.c b/sys/net80211/ieee80211_wds.c index ede739d61441..ff55ed7ab6dd 100644 --- a/sys/net80211/ieee80211_wds.c +++ b/sys/net80211/ieee80211_wds.c @@ -1,863 +1,859 @@ /*- * 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 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, int rssi, int noise, uint32_t rstamp); static void wds_recv_mgmt(struct ieee80211_node *, struct mbuf *, int subtype, int rssi, int noise, u_int32_t rstamp); 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 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 pending frames now that were setup. */ if (ni != NULL && IEEE80211_NODE_WDSQ_QLEN(ni) != 0) { int8_t rssi, noise; IEEE80211_NOTE(vap, IEEE80211_MSG_WDS, ni, "flush wds queue, %u packets queued", IEEE80211_NODE_WDSQ_QLEN(ni)); ic->ic_node_getsignal(ni, &rssi, &noise); for (;;) { struct mbuf *m; IEEE80211_NODE_WDSQ_LOCK(ni); _IEEE80211_NODE_WDSQ_DEQUEUE_HEAD(ni, m); IEEE80211_NODE_WDSQ_UNLOCK(ni); if (m == NULL) break; /* XXX cheat and re-use last rstamp */ ieee80211_input(ni, m, rssi, noise, ni->ni_rstamp); } } 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; struct ifnet *parent = ic->ic_ifp; 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. We don't need * to classify or lookup the tx node; this was already * done by the caller so we can just re-use the info. */ mcopy = m_copypacket(m, M_DONTWAIT); if (mcopy == NULL) { ifp->if_oerrors++; /* XXX stat + msg */ continue; } ni = ieee80211_find_txnode(vap, eh->ether_dhost); if (ni == NULL) { /* NB: ieee80211_find_txnode does stat+msg */ ifp->if_oerrors++; m_freem(mcopy); continue; } 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++; ifp->if_oerrors++; m_freem(mcopy); ieee80211_free_node(ni); continue; } mcopy->m_flags |= M_MCAST | M_WDS; mcopy->m_pkthdr.rcvif = (void *) ni; IFQ_HANDOFF(parent, mcopy, err); if (err) { /* NB: IFQ_HANDOFF reclaims mbuf */ ifp->if_oerrors++; ieee80211_free_node(ni); } else ifp->if_opackets++; } } /* * 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 ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; int qlen, age; IEEE80211_NODE_WDSQ_LOCK(ni); if (!_IF_QFULL(&ni->ni_wdsq)) { /* * Tag the frame with it's expiry time and insert * it in the queue. The aging interval is 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? */ /* NB: TU -> secs */ age = ((ni->ni_intval * ic->ic_lintval) << 2) / 1024; _IEEE80211_NODE_WDSQ_ENQUEUE(ni, m, qlen, age); IEEE80211_NODE_WDSQ_UNLOCK(ni); IEEE80211_NOTE(vap, IEEE80211_MSG_WDS, ni, "save frame, %u now queued", qlen); } else { vap->iv_stats.is_dwds_qdrop++; _IF_DROP(&ni->ni_wdsq); IEEE80211_NODE_WDSQ_UNLOCK(ni); IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT | IEEE80211_MSG_WDS, mtod(m, struct ieee80211_frame *), "wds data", "pending q overflow, drops %d (len %d)", ni->ni_wdsq.ifq_drops, ni->ni_wdsq.ifq_len); #ifdef IEEE80211_DEBUG if (ieee80211_msg_dumppkts(vap)) ieee80211_dump_pkt(ic, mtod(m, caddr_t), m->m_len, -1, -1); #endif /* XXX tail drop? */ m_freem(m); } ieee80211_notify_wds_discover(ni); } /* * Age frames on the WDS pending queue. The aging interval is * 4 times the listen interval specified by the station. This * number is factored into the age calculations when the frame * is placed on the queue. We store ages as time differences * so we can check and/or adjust only the head of the list. * If a frame's age exceeds the threshold then discard it. * The number of frames discarded is returned to the caller. */ int ieee80211_node_wdsq_age(struct ieee80211_node *ni) { #ifdef IEEE80211_DEBUG struct ieee80211vap *vap = ni->ni_vap; #endif struct mbuf *m; int discard = 0; IEEE80211_NODE_WDSQ_LOCK(ni); while (_IF_POLL(&ni->ni_wdsq, m) != NULL && M_AGE_GET(m) < IEEE80211_INACT_WAIT) { IEEE80211_NOTE(vap, IEEE80211_MSG_WDS, ni, "discard frame, age %u", M_AGE_GET(m)); /* XXX could be optimized */ _IEEE80211_NODE_WDSQ_DEQUEUE_HEAD(ni, m); m_freem(m); discard++; } if (m != NULL) M_AGE_SUB(m, IEEE80211_INACT_WAIT); IEEE80211_NODE_WDSQ_UNLOCK(ni); IEEE80211_NOTE(vap, IEEE80211_MSG_WDS, ni, "discard %u frames for age", discard); #if 0 IEEE80211_NODE_STAT_ADD(ni, wds_discard, discard); #endif return discard; } /* * 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, int rssi, int noise, uint32_t rstamp) { #define SEQ_LEQ(a,b) ((int)((a)-(b)) <= 0) #define HAS_SEQ(type) ((type & 0x4) == 0) 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; uint8_t dir, type, subtype, qos; uint16_t rxseq; - if (m->m_flags & M_AMPDU) { + if (m->m_flags & M_AMPDU_MPDU) { /* * Fastpath for A-MPDU reorder q resubmission. Frames - * w/ M_AMPDU 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 flag and we can bypass most of the - * normal processing. + * 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")); need_tap = 1; /* mbuf need to be tapped. */ 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 %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; /* 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 = noise; ni->ni_rstamp = rstamp; 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++; rxseq = le16toh(*(uint16_t *)wh->i_seq); if ((ni->ni_flags & IEEE80211_NODE_HT) == 0 && (wh->i_fc[1] & IEEE80211_FC1_RETRY) && SEQ_LEQ(rxseq, ni->ni_rxseqs[tid])) { /* duplicate, discard */ IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr1, "duplicate", "seqno <%u,%u> fragno <%u,%u> tid %u", rxseq >> IEEE80211_SEQ_SEQ_SHIFT, ni->ni_rxseqs[tid] >> IEEE80211_SEQ_SEQ_SHIFT, rxseq & IEEE80211_SEQ_FRAG_MASK, ni->ni_rxseqs[tid] & IEEE80211_SEQ_FRAG_MASK, tid); vap->iv_stats.is_rx_dup++; IEEE80211_NODE_STAT(ni, rx_dup); goto out; } ni->ni_rxseqs[tid] = rxseq; } 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; } if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) ni->ni_inact = ni->ni_inact_reload; /* - * Handle A-MPDU re-ordering. The station must be - * associated and negotiated HT. The frame must be - * a QoS frame (not QoS null data) and not previously - * processed for A-MPDU re-ordering. If the frame is - * to be processed directly then ieee80211_ampdu_reorder + * 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 ((ni->ni_flags & IEEE80211_NODE_HT) && - subtype == IEEE80211_FC0_SUBTYPE_QOS && + 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_WEP) { 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_WEP; } 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 (bpf_peers_present(vap->iv_rawbpf)) bpf_mtap(vap->iv_rawbpf, 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 if ((ni->ni_ath_flags & IEEE80211_NODE_FF) && #define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc)) m->m_pkthdr.len >= 3*FF_LLC_SIZE) { struct llc *llc; /* * Check for fast-frame tunnel encapsulation. */ if (m->m_len < FF_LLC_SIZE && (m = m_pullup(m, FF_LLC_SIZE)) == NULL) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, "fast-frame", "%s", "m_pullup(llc) failed"); vap->iv_stats.is_rx_tooshort++; return IEEE80211_FC0_TYPE_DATA; } llc = (struct llc *)(mtod(m, uint8_t *) + sizeof(struct ether_header)); if (llc->llc_snap.ether_type == htons(ATH_FF_ETH_TYPE)) { m_adj(m, FF_LLC_SIZE); m = ieee80211_decap_fastframe(ni, m); if (m == NULL) return IEEE80211_FC0_TYPE_DATA; } } #undef FF_LLC_SIZE 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], ether_sprintf(wh->i_addr2), rssi); } #endif if (wh->i_fc[1] & IEEE80211_FC1_WEP) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "WEP set but not permitted"); vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ goto out; } if (bpf_peers_present(vap->iv_rawbpf)) bpf_mtap(vap->iv_rawbpf, m); vap->iv_recv_mgmt(ni, m, subtype, rssi, noise, rstamp); m_freem(m); return IEEE80211_FC0_TYPE_MGT; 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: ifp->if_ierrors++; out: if (m != NULL) { if (bpf_peers_present(vap->iv_rawbpf) && need_tap) bpf_mtap(vap->iv_rawbpf, m); m_freem(m); } return type; #undef SEQ_LEQ } static void wds_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, int rssi, int noise, u_int32_t rstamp) { 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_DEAUTH: case IEEE80211_FC0_SUBTYPE_PROBE_RESP: case IEEE80211_FC0_SUBTYPE_BEACON: case IEEE80211_FC0_SUBTYPE_PROBE_REQ: case IEEE80211_FC0_SUBTYPE_AUTH: case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: case IEEE80211_FC0_SUBTYPE_DISASSOC: vap->iv_stats.is_rx_mgtdiscard++; break; case IEEE80211_FC0_SUBTYPE_ACTION: if (vap->iv_state != IEEE80211_S_RUN || IEEE80211_IS_MULTICAST(wh->i_addr1)) { vap->iv_stats.is_rx_mgtdiscard++; break; } ni->ni_inact = ni->ni_inact_reload; if (ieee80211_parse_action(ni, m0) == 0) ic->ic_recv_action(ni, frm, efrm); break; default: IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, wh, "mgt", "subtype 0x%x not handled", subtype); vap->iv_stats.is_rx_badsubtype++; break; } }