diff --git a/sys/net80211/ieee80211_crypto_wep.c b/sys/net80211/ieee80211_crypto_wep.c index bdaab1b29e14..797de006cdf2 100644 --- a/sys/net80211/ieee80211_crypto_wep.c +++ b/sys/net80211/ieee80211_crypto_wep.c @@ -1,517 +1,517 @@ /*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); /* * IEEE 802.11 WEP crypto support. */ #include "opt_wlan.h" #include #include #include #include #include #include #include #include #include #include #include #include static void *wep_attach(struct ieee80211vap *, struct ieee80211_key *); static void wep_detach(struct ieee80211_key *); static int wep_setkey(struct ieee80211_key *); static void wep_setiv(struct ieee80211_key *, uint8_t *); static int wep_encap(struct ieee80211_key *, struct mbuf *); static int wep_decap(struct ieee80211_key *, struct mbuf *, int); static int wep_enmic(struct ieee80211_key *, struct mbuf *, int); static int wep_demic(struct ieee80211_key *, struct mbuf *, int); static const struct ieee80211_cipher wep = { .ic_name = "WEP", .ic_cipher = IEEE80211_CIPHER_WEP, .ic_header = IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN, .ic_trailer = IEEE80211_WEP_CRCLEN, .ic_miclen = 0, .ic_attach = wep_attach, .ic_detach = wep_detach, .ic_setkey = wep_setkey, .ic_setiv = wep_setiv, .ic_encap = wep_encap, .ic_decap = wep_decap, .ic_enmic = wep_enmic, .ic_demic = wep_demic, }; static int wep_encrypt(struct ieee80211_key *, struct mbuf *, int hdrlen); static int wep_decrypt(struct ieee80211_key *, struct mbuf *, int hdrlen); struct wep_ctx { struct ieee80211vap *wc_vap; /* for diagnostics+statistics */ struct ieee80211com *wc_ic; uint32_t wc_iv; /* initial vector for crypto */ }; /* number of references from net80211 layer */ static int nrefs = 0; static void * wep_attach(struct ieee80211vap *vap, struct ieee80211_key *k) { struct wep_ctx *ctx; ctx = (struct wep_ctx *) IEEE80211_MALLOC(sizeof(struct wep_ctx), M_80211_CRYPTO, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); if (ctx == NULL) { vap->iv_stats.is_crypto_nomem++; return NULL; } ctx->wc_vap = vap; ctx->wc_ic = vap->iv_ic; - get_random_bytes(&ctx->wc_iv, sizeof(ctx->wc_iv)); + net80211_get_random_bytes(&ctx->wc_iv, sizeof(ctx->wc_iv)); nrefs++; /* NB: we assume caller locking */ return ctx; } static void wep_detach(struct ieee80211_key *k) { struct wep_ctx *ctx = k->wk_private; IEEE80211_FREE(ctx, M_80211_CRYPTO); KASSERT(nrefs > 0, ("imbalanced attach/detach")); nrefs--; /* NB: we assume caller locking */ } static int wep_setkey(struct ieee80211_key *k) { return k->wk_keylen >= 40/NBBY; } static void wep_setiv(struct ieee80211_key *k, uint8_t *ivp) { struct wep_ctx *ctx = k->wk_private; struct ieee80211vap *vap = ctx->wc_vap; uint32_t iv; uint8_t keyid; keyid = ieee80211_crypto_get_keyid(vap, k) << 6; /* * XXX * IV must not duplicate during the lifetime of the key. * But no mechanism to renew keys is defined in IEEE 802.11 * for WEP. And the IV may be duplicated at other stations * because the session key itself is shared. So we use a * pseudo random IV for now, though it is not the right way. * * NB: Rather than use a strictly random IV we select a * random one to start and then increment the value for * each frame. This is an explicit tradeoff between * overhead and security. Given the basic insecurity of * WEP this seems worthwhile. */ /* * Skip 'bad' IVs from Fluhrer/Mantin/Shamir: * (B, 255, N) with 3 <= B < 16 and 0 <= N <= 255 */ iv = ctx->wc_iv; if ((iv & 0xff00) == 0xff00) { int B = (iv & 0xff0000) >> 16; if (3 <= B && B < 16) iv += 0x0100; } ctx->wc_iv = iv + 1; /* * NB: Preserve byte order of IV for packet * sniffers; it doesn't matter otherwise. */ #if _BYTE_ORDER == _BIG_ENDIAN ivp[0] = iv >> 0; ivp[1] = iv >> 8; ivp[2] = iv >> 16; #else ivp[2] = iv >> 0; ivp[1] = iv >> 8; ivp[0] = iv >> 16; #endif ivp[3] = keyid; } /* * Add privacy headers appropriate for the specified key. */ static int wep_encap(struct ieee80211_key *k, struct mbuf *m) { struct wep_ctx *ctx = k->wk_private; struct ieee80211com *ic = ctx->wc_ic; struct ieee80211_frame *wh; uint8_t *ivp; int hdrlen; int is_mgmt; hdrlen = ieee80211_hdrspace(ic, mtod(m, void *)); wh = mtod(m, struct ieee80211_frame *); is_mgmt = IEEE80211_IS_MGMT(wh); /* * Check to see if IV is required. */ if (is_mgmt && (k->wk_flags & IEEE80211_KEY_NOIVMGT)) return 1; if ((! is_mgmt) && (k->wk_flags & IEEE80211_KEY_NOIV)) return 1; /* * Copy down 802.11 header and add the IV + KeyID. */ M_PREPEND(m, wep.ic_header, M_NOWAIT); if (m == NULL) return 0; ivp = mtod(m, uint8_t *); ovbcopy(ivp + wep.ic_header, ivp, hdrlen); ivp += hdrlen; wep_setiv(k, ivp); /* * Finally, do software encrypt if needed. */ if ((k->wk_flags & IEEE80211_KEY_SWENCRYPT) && !wep_encrypt(k, m, hdrlen)) return 0; return 1; } /* * Add MIC to the frame as needed. */ static int wep_enmic(struct ieee80211_key *k, struct mbuf *m, int force) { return 1; } /* * Validate and strip privacy headers (and trailer) for a * received frame. If necessary, decrypt the frame using * the specified key. */ static int wep_decap(struct ieee80211_key *k, struct mbuf *m, int hdrlen) { struct wep_ctx *ctx = k->wk_private; struct ieee80211vap *vap = ctx->wc_vap; struct ieee80211_frame *wh; const struct ieee80211_rx_stats *rxs; wh = mtod(m, struct ieee80211_frame *); rxs = ieee80211_get_rx_params_ptr(m); if ((rxs != NULL) && (rxs->c_pktflags & IEEE80211_RX_F_IV_STRIP)) goto finish; /* * Check if the device handled the decrypt in hardware. * If so we just strip the header; otherwise we need to * handle the decrypt in software. */ if ((k->wk_flags & IEEE80211_KEY_SWDECRYPT) && !wep_decrypt(k, m, hdrlen)) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, "%s", "WEP ICV mismatch on decrypt"); vap->iv_stats.is_rx_wepfail++; return 0; } /* * Copy up 802.11 header and strip crypto bits. */ ovbcopy(mtod(m, void *), mtod(m, uint8_t *) + wep.ic_header, hdrlen); m_adj(m, wep.ic_header); finish: /* XXX TODO: do we have to strip this for offload devices? */ m_adj(m, -wep.ic_trailer); return 1; } /* * Verify and strip MIC from the frame. */ static int wep_demic(struct ieee80211_key *k, struct mbuf *skb, int force) { return 1; } static const uint32_t crc32_table[256] = { 0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L, 0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L, 0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L, 0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL, 0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L, 0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L, 0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L, 0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL, 0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L, 0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL, 0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L, 0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L, 0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L, 0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL, 0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL, 0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L, 0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL, 0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L, 0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L, 0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L, 0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL, 0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L, 0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L, 0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL, 0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L, 0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L, 0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L, 0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L, 0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L, 0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL, 0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL, 0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L, 0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L, 0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL, 0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL, 0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L, 0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL, 0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L, 0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL, 0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L, 0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL, 0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L, 0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L, 0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL, 0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L, 0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L, 0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L, 0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L, 0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L, 0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L, 0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL, 0x2d02ef8dL }; static int wep_encrypt(struct ieee80211_key *key, struct mbuf *m0, int hdrlen) { #define S_SWAP(a,b) do { uint8_t t = S[a]; S[a] = S[b]; S[b] = t; } while(0) struct wep_ctx *ctx = key->wk_private; struct ieee80211vap *vap = ctx->wc_vap; struct mbuf *m = m0; uint8_t rc4key[IEEE80211_WEP_IVLEN + IEEE80211_KEYBUF_SIZE]; uint8_t icv[IEEE80211_WEP_CRCLEN]; uint32_t i, j, k, crc; size_t buflen, data_len; uint8_t S[256]; uint8_t *pos; u_int off, keylen; vap->iv_stats.is_crypto_wep++; /* NB: this assumes the header was pulled up */ memcpy(rc4key, mtod(m, uint8_t *) + hdrlen, IEEE80211_WEP_IVLEN); memcpy(rc4key + IEEE80211_WEP_IVLEN, key->wk_key, key->wk_keylen); /* Setup RC4 state */ for (i = 0; i < 256; i++) S[i] = i; j = 0; keylen = key->wk_keylen + IEEE80211_WEP_IVLEN; for (i = 0; i < 256; i++) { j = (j + S[i] + rc4key[i % keylen]) & 0xff; S_SWAP(i, j); } off = hdrlen + wep.ic_header; data_len = m->m_pkthdr.len - off; /* Compute CRC32 over unencrypted data and apply RC4 to data */ crc = ~0; i = j = 0; pos = mtod(m, uint8_t *) + off; buflen = m->m_len - off; for (;;) { if (buflen > data_len) buflen = data_len; data_len -= buflen; for (k = 0; k < buflen; k++) { crc = crc32_table[(crc ^ *pos) & 0xff] ^ (crc >> 8); i = (i + 1) & 0xff; j = (j + S[i]) & 0xff; S_SWAP(i, j); *pos++ ^= S[(S[i] + S[j]) & 0xff]; } if (m->m_next == NULL) { if (data_len != 0) { /* out of data */ IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, ether_sprintf(mtod(m0, struct ieee80211_frame *)->i_addr2), "out of data for WEP (data_len %zu)", data_len); /* XXX stat */ return 0; } break; } m = m->m_next; pos = mtod(m, uint8_t *); buflen = m->m_len; } crc = ~crc; /* Append little-endian CRC32 and encrypt it to produce ICV */ icv[0] = crc; icv[1] = crc >> 8; icv[2] = crc >> 16; icv[3] = crc >> 24; for (k = 0; k < IEEE80211_WEP_CRCLEN; k++) { i = (i + 1) & 0xff; j = (j + S[i]) & 0xff; S_SWAP(i, j); icv[k] ^= S[(S[i] + S[j]) & 0xff]; } return m_append(m0, IEEE80211_WEP_CRCLEN, icv); #undef S_SWAP } static int wep_decrypt(struct ieee80211_key *key, struct mbuf *m0, int hdrlen) { #define S_SWAP(a,b) do { uint8_t t = S[a]; S[a] = S[b]; S[b] = t; } while(0) struct wep_ctx *ctx = key->wk_private; struct ieee80211vap *vap = ctx->wc_vap; struct mbuf *m = m0; uint8_t rc4key[IEEE80211_WEP_IVLEN + IEEE80211_KEYBUF_SIZE]; uint8_t icv[IEEE80211_WEP_CRCLEN]; uint32_t i, j, k, crc; size_t buflen, data_len; uint8_t S[256]; uint8_t *pos; u_int off, keylen; vap->iv_stats.is_crypto_wep++; /* NB: this assumes the header was pulled up */ memcpy(rc4key, mtod(m, uint8_t *) + hdrlen, IEEE80211_WEP_IVLEN); memcpy(rc4key + IEEE80211_WEP_IVLEN, key->wk_key, key->wk_keylen); /* Setup RC4 state */ for (i = 0; i < 256; i++) S[i] = i; j = 0; keylen = key->wk_keylen + IEEE80211_WEP_IVLEN; for (i = 0; i < 256; i++) { j = (j + S[i] + rc4key[i % keylen]) & 0xff; S_SWAP(i, j); } off = hdrlen + wep.ic_header; data_len = m->m_pkthdr.len - (off + wep.ic_trailer); /* Compute CRC32 over unencrypted data and apply RC4 to data */ crc = ~0; i = j = 0; pos = mtod(m, uint8_t *) + off; buflen = m->m_len - off; for (;;) { if (buflen > data_len) buflen = data_len; data_len -= buflen; for (k = 0; k < buflen; k++) { i = (i + 1) & 0xff; j = (j + S[i]) & 0xff; S_SWAP(i, j); *pos ^= S[(S[i] + S[j]) & 0xff]; crc = crc32_table[(crc ^ *pos) & 0xff] ^ (crc >> 8); pos++; } m = m->m_next; if (m == NULL) { if (data_len != 0) { /* out of data */ IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, mtod(m0, struct ieee80211_frame *)->i_addr2, "out of data for WEP (data_len %zu)", data_len); return 0; } break; } pos = mtod(m, uint8_t *); buflen = m->m_len; } crc = ~crc; /* Encrypt little-endian CRC32 and verify that it matches with * received ICV */ icv[0] = crc; icv[1] = crc >> 8; icv[2] = crc >> 16; icv[3] = crc >> 24; for (k = 0; k < IEEE80211_WEP_CRCLEN; k++) { i = (i + 1) & 0xff; j = (j + S[i]) & 0xff; S_SWAP(i, j); /* XXX assumes ICV is contiguous in mbuf */ if ((icv[k] ^ S[(S[i] + S[j]) & 0xff]) != *pos++) { /* ICV mismatch - drop frame */ return 0; } } return 1; #undef S_SWAP } /* * Module glue. */ IEEE80211_CRYPTO_MODULE(wep, 1); diff --git a/sys/net80211/ieee80211_dfs.c b/sys/net80211/ieee80211_dfs.c index abe67576d711..b3959220bfc9 100644 --- a/sys/net80211/ieee80211_dfs.c +++ b/sys/net80211/ieee80211_dfs.c @@ -1,440 +1,440 @@ /*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * 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 DFS/Radar 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 static MALLOC_DEFINE(M_80211_DFS, "80211dfs", "802.11 DFS state"); static int ieee80211_nol_timeout = 30*60; /* 30 minutes */ SYSCTL_INT(_net_wlan, OID_AUTO, nol_timeout, CTLFLAG_RW, &ieee80211_nol_timeout, 0, "NOL timeout (secs)"); #define NOL_TIMEOUT msecs_to_ticks(ieee80211_nol_timeout*1000) static int ieee80211_cac_timeout = 60; /* 60 seconds */ SYSCTL_INT(_net_wlan, OID_AUTO, cac_timeout, CTLFLAG_RW, &ieee80211_cac_timeout, 0, "CAC timeout (secs)"); #define CAC_TIMEOUT msecs_to_ticks(ieee80211_cac_timeout*1000) /* DFS* In order to facilitate debugging, a couple of operating * modes aside from the default are needed. * * 0 - default CAC/NOL behaviour - ie, start CAC, place * channel on NOL list. * 1 - send CAC, but don't change channel or add the channel * to the NOL list. * 2 - just match on radar, don't send CAC or place channel in * the NOL list. */ static int ieee80211_dfs_debug = DFS_DBG_NONE; /* * This option must not be included in the default kernel * as it allows users to plainly disable CAC/NOL handling. */ #ifdef IEEE80211_DFS_DEBUG SYSCTL_INT(_net_wlan, OID_AUTO, dfs_debug, CTLFLAG_RW, &ieee80211_dfs_debug, 0, "DFS debug behaviour"); #endif static int null_set_quiet(struct ieee80211_node *ni, u_int8_t *quiet_elm) { return ENOSYS; } void ieee80211_dfs_attach(struct ieee80211com *ic) { struct ieee80211_dfs_state *dfs = &ic->ic_dfs; callout_init_mtx(&dfs->nol_timer, IEEE80211_LOCK_OBJ(ic), 0); callout_init_mtx(&dfs->cac_timer, IEEE80211_LOCK_OBJ(ic), 0); ic->ic_set_quiet = null_set_quiet; } void ieee80211_dfs_detach(struct ieee80211com *ic) { /* NB: we assume no locking is needed */ ieee80211_dfs_reset(ic); } void ieee80211_dfs_reset(struct ieee80211com *ic) { struct ieee80211_dfs_state *dfs = &ic->ic_dfs; int i; /* NB: we assume no locking is needed */ /* NB: cac_timer should be cleared by the state machine */ callout_drain(&dfs->nol_timer); for (i = 0; i < ic->ic_nchans; i++) ic->ic_channels[i].ic_state = 0; dfs->lastchan = NULL; } static void cac_timeout(void *arg) { struct ieee80211vap *vap = arg; struct ieee80211com *ic = vap->iv_ic; struct ieee80211_dfs_state *dfs = &ic->ic_dfs; int i; IEEE80211_LOCK_ASSERT(ic); if (vap->iv_state != IEEE80211_S_CAC) /* NB: just in case */ return; /* * When radar is detected during a CAC we are woken * up prematurely to switch to a new channel. * Check the channel to decide how to act. */ if (IEEE80211_IS_CHAN_RADAR(ic->ic_curchan)) { ieee80211_notify_cac(ic, ic->ic_curchan, IEEE80211_NOTIFY_CAC_RADAR); if_printf(vap->iv_ifp, "CAC timer on channel %u (%u MHz) stopped due to radar\n", ic->ic_curchan->ic_ieee, ic->ic_curchan->ic_freq); /* XXX clobbers any existing desired channel */ /* NB: dfs->newchan may be NULL, that's ok */ vap->iv_des_chan = dfs->newchan; ieee80211_new_state_locked(vap, IEEE80211_S_SCAN, 0); } else { if_printf(vap->iv_ifp, "CAC timer on channel %u (%u MHz) expired; " "no radar detected\n", ic->ic_curchan->ic_ieee, ic->ic_curchan->ic_freq); /* * Mark all channels with the current frequency * as having completed CAC; this keeps us from * doing it again until we change channels. */ for (i = 0; i < ic->ic_nchans; i++) { struct ieee80211_channel *c = &ic->ic_channels[i]; if (c->ic_freq == ic->ic_curchan->ic_freq) c->ic_state |= IEEE80211_CHANSTATE_CACDONE; } ieee80211_notify_cac(ic, ic->ic_curchan, IEEE80211_NOTIFY_CAC_EXPIRE); ieee80211_cac_completeswitch(vap); } } /* * Initiate the CAC timer. The driver is responsible * for setting up the hardware to scan for radar on the * channnel, we just handle timing things out. */ void ieee80211_dfs_cac_start(struct ieee80211vap *vap) { struct ieee80211com *ic = vap->iv_ic; struct ieee80211_dfs_state *dfs = &ic->ic_dfs; IEEE80211_LOCK_ASSERT(ic); callout_reset(&dfs->cac_timer, CAC_TIMEOUT, cac_timeout, vap); if_printf(vap->iv_ifp, "start %d second CAC timer on channel %u (%u MHz)\n", ticks_to_secs(CAC_TIMEOUT), ic->ic_curchan->ic_ieee, ic->ic_curchan->ic_freq); ieee80211_notify_cac(ic, ic->ic_curchan, IEEE80211_NOTIFY_CAC_START); } /* * Clear the CAC timer. */ void ieee80211_dfs_cac_stop(struct ieee80211vap *vap) { struct ieee80211com *ic = vap->iv_ic; struct ieee80211_dfs_state *dfs = &ic->ic_dfs; IEEE80211_LOCK_ASSERT(ic); /* NB: racey but not important */ if (callout_pending(&dfs->cac_timer)) { if_printf(vap->iv_ifp, "stop CAC timer on channel %u (%u MHz)\n", ic->ic_curchan->ic_ieee, ic->ic_curchan->ic_freq); ieee80211_notify_cac(ic, ic->ic_curchan, IEEE80211_NOTIFY_CAC_STOP); } callout_stop(&dfs->cac_timer); } void ieee80211_dfs_cac_clear(struct ieee80211com *ic, const struct ieee80211_channel *chan) { int i; for (i = 0; i < ic->ic_nchans; i++) { struct ieee80211_channel *c = &ic->ic_channels[i]; if (c->ic_freq == chan->ic_freq) c->ic_state &= ~IEEE80211_CHANSTATE_CACDONE; } } static void dfs_timeout(void *arg) { struct ieee80211com *ic = arg; struct ieee80211_dfs_state *dfs = &ic->ic_dfs; struct ieee80211_channel *c; int i, oldest, now; IEEE80211_LOCK_ASSERT(ic); now = oldest = ticks; for (i = 0; i < ic->ic_nchans; i++) { c = &ic->ic_channels[i]; if (IEEE80211_IS_CHAN_RADAR(c)) { if (ieee80211_time_after_eq(now, dfs->nol_event[i]+NOL_TIMEOUT)) { c->ic_state &= ~IEEE80211_CHANSTATE_RADAR; if (c->ic_state & IEEE80211_CHANSTATE_NORADAR) { /* * NB: do this here so we get only one * msg instead of one for every channel * table entry. */ ic_printf(ic, "radar on channel %u " "(%u MHz) cleared after timeout\n", c->ic_ieee, c->ic_freq); /* notify user space */ c->ic_state &= ~IEEE80211_CHANSTATE_NORADAR; ieee80211_notify_radar(ic, c); } } else if (dfs->nol_event[i] < oldest) oldest = dfs->nol_event[i]; } } if (oldest != now) { /* arrange to process next channel up for a status change */ callout_schedule(&dfs->nol_timer, oldest + NOL_TIMEOUT - now); } } static void announce_radar(struct ieee80211com *ic, const struct ieee80211_channel *curchan, const struct ieee80211_channel *newchan) { if (newchan == NULL) ic_printf(ic, "radar detected on channel %u (%u MHz)\n", curchan->ic_ieee, curchan->ic_freq); else ic_printf(ic, "radar detected on channel %u (%u MHz), " "moving to channel %u (%u MHz)\n", curchan->ic_ieee, curchan->ic_freq, newchan->ic_ieee, newchan->ic_freq); } /* * Handle a radar detection event on a channel. The channel is * added to the NOL list and we record the time of the event. * Entries are aged out after NOL_TIMEOUT. If radar was * detected while doing CAC we force a state/channel change. * Otherwise radar triggers a channel switch using the CSA * mechanism (when the channel is the bss channel). */ void ieee80211_dfs_notify_radar(struct ieee80211com *ic, struct ieee80211_channel *chan) { struct ieee80211_dfs_state *dfs = &ic->ic_dfs; int i, now; IEEE80211_LOCK_ASSERT(ic); /* * If doing DFS debugging (mode 2), don't bother * running the rest of this function. * * Simply announce the presence of the radar and continue * along merrily. */ if (ieee80211_dfs_debug == DFS_DBG_NOCSANOL) { announce_radar(ic, chan, chan); ieee80211_notify_radar(ic, chan); return; } /* * Don't mark the channel and don't put it into NOL * if we're doing DFS debugging. */ if (ieee80211_dfs_debug == DFS_DBG_NONE) { /* * Mark all entries with this frequency. Notify user * space and arrange for notification when the radar * indication is cleared. Then kick the NOL processing * thread if not already running. */ now = ticks; for (i = 0; i < ic->ic_nchans; i++) { struct ieee80211_channel *c = &ic->ic_channels[i]; if (c->ic_freq == chan->ic_freq) { c->ic_state &= ~IEEE80211_CHANSTATE_CACDONE; c->ic_state |= IEEE80211_CHANSTATE_RADAR; dfs->nol_event[i] = now; } } ieee80211_notify_radar(ic, chan); chan->ic_state |= IEEE80211_CHANSTATE_NORADAR; if (!callout_pending(&dfs->nol_timer)) callout_reset(&dfs->nol_timer, NOL_TIMEOUT, dfs_timeout, ic); } /* * If radar is detected on the bss channel while * doing CAC; force a state change by scheduling the * callout to be dispatched asap. Otherwise, if this * event is for the bss channel then we must quiet * traffic and schedule a channel switch. * * Note this allows us to receive notification about * channels other than the bss channel; not sure * that can/will happen but it's simple to support. */ if (chan == ic->ic_bsschan) { /* XXX need a way to defer to user app */ /* * Don't flip over to a new channel if * we are currently doing DFS debugging. */ if (ieee80211_dfs_debug == DFS_DBG_NONE) dfs->newchan = ieee80211_dfs_pickchannel(ic); else dfs->newchan = chan; announce_radar(ic, chan, dfs->newchan); if (callout_pending(&dfs->cac_timer)) callout_schedule(&dfs->cac_timer, 0); else if (dfs->newchan != NULL) { /* XXX mode 1, switch count 2 */ /* XXX calculate switch count based on max switch time and beacon interval? */ ieee80211_csa_startswitch(ic, dfs->newchan, 1, 2); } else { /* * Spec says to stop all transmissions and * wait on the current channel for an entry * on the NOL to expire. */ /*XXX*/ ic_printf(ic, "%s: No free channels; waiting for entry " "on NOL to expire\n", __func__); } } else { /* * Issue rate-limited console msgs. */ if (dfs->lastchan != chan) { dfs->lastchan = chan; dfs->cureps = 0; announce_radar(ic, chan, NULL); } else if (ppsratecheck(&dfs->lastevent, &dfs->cureps, 1)) { announce_radar(ic, chan, NULL); } } } struct ieee80211_channel * ieee80211_dfs_pickchannel(struct ieee80211com *ic) { struct ieee80211_channel *c; int i, flags; uint16_t v; /* * Consult the scan cache first. */ flags = ic->ic_curchan->ic_flags & IEEE80211_CHAN_ALL; /* * XXX if curchan is HT this will never find a channel * XXX 'cuz we scan only legacy channels */ c = ieee80211_scan_pickchannel(ic, flags); if (c != NULL) return c; /* * No channel found in scan cache; select a compatible * one at random (skipping channels where radar has * been detected). */ - get_random_bytes(&v, sizeof(v)); + net80211_get_random_bytes(&v, sizeof(v)); v %= ic->ic_nchans; for (i = v; i < ic->ic_nchans; i++) { c = &ic->ic_channels[i]; if (!IEEE80211_IS_CHAN_RADAR(c) && (c->ic_flags & flags) == flags) return c; } for (i = 0; i < v; i++) { c = &ic->ic_channels[i]; if (!IEEE80211_IS_CHAN_RADAR(c) && (c->ic_flags & flags) == flags) return c; } ic_printf(ic, "HELP, no channel located to switch to!\n"); return NULL; } diff --git a/sys/net80211/ieee80211_freebsd.c b/sys/net80211/ieee80211_freebsd.c index 850c93d1e5df..011ae7060a6c 100644 --- a/sys/net80211/ieee80211_freebsd.c +++ b/sys/net80211/ieee80211_freebsd.c @@ -1,1185 +1,1185 @@ /*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2003-2009 Sam Leffler, Errno Consulting * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); /* * IEEE 802.11 support (FreeBSD-specific code) */ #include "opt_wlan.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include DEBUGNET_DEFINE(ieee80211); SYSCTL_NODE(_net, OID_AUTO, wlan, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, "IEEE 80211 parameters"); #ifdef IEEE80211_DEBUG static int ieee80211_debug = 0; SYSCTL_INT(_net_wlan, OID_AUTO, debug, CTLFLAG_RW, &ieee80211_debug, 0, "debugging printfs"); #endif static const char wlanname[] = "wlan"; static struct if_clone *wlan_cloner; /* * priv(9) NET80211 checks. * Return 0 if operation is allowed, E* (usually EPERM) otherwise. */ int ieee80211_priv_check_vap_getkey(u_long cmd __unused, struct ieee80211vap *vap __unused, struct ifnet *ifp __unused) { return (priv_check(curthread, PRIV_NET80211_VAP_GETKEY)); } int ieee80211_priv_check_vap_manage(u_long cmd __unused, struct ieee80211vap *vap __unused, struct ifnet *ifp __unused) { return (priv_check(curthread, PRIV_NET80211_VAP_MANAGE)); } int ieee80211_priv_check_vap_setmac(u_long cmd __unused, struct ieee80211vap *vap __unused, struct ifnet *ifp __unused) { return (priv_check(curthread, PRIV_NET80211_VAP_SETMAC)); } int ieee80211_priv_check_create_vap(u_long cmd __unused, struct ieee80211vap *vap __unused, struct ifnet *ifp __unused) { return (priv_check(curthread, PRIV_NET80211_CREATE_VAP)); } static int wlan_clone_create(struct if_clone *ifc, int unit, caddr_t params) { struct ieee80211_clone_params cp; struct ieee80211vap *vap; struct ieee80211com *ic; int error; error = ieee80211_priv_check_create_vap(0, NULL, NULL); if (error) return error; error = copyin(params, &cp, sizeof(cp)); if (error) return error; ic = ieee80211_find_com(cp.icp_parent); if (ic == NULL) return ENXIO; if (cp.icp_opmode >= IEEE80211_OPMODE_MAX) { ic_printf(ic, "%s: invalid opmode %d\n", __func__, cp.icp_opmode); return EINVAL; } if ((ic->ic_caps & ieee80211_opcap[cp.icp_opmode]) == 0) { ic_printf(ic, "%s mode not supported\n", ieee80211_opmode_name[cp.icp_opmode]); return EOPNOTSUPP; } if ((cp.icp_flags & IEEE80211_CLONE_TDMA) && #ifdef IEEE80211_SUPPORT_TDMA (ic->ic_caps & IEEE80211_C_TDMA) == 0 #else (1) #endif ) { ic_printf(ic, "TDMA not supported\n"); return EOPNOTSUPP; } vap = ic->ic_vap_create(ic, wlanname, unit, cp.icp_opmode, cp.icp_flags, cp.icp_bssid, cp.icp_flags & IEEE80211_CLONE_MACADDR ? cp.icp_macaddr : ic->ic_macaddr); if (vap == NULL) return (EIO); #ifdef DEBUGNET if (ic->ic_debugnet_meth != NULL) DEBUGNET_SET(vap->iv_ifp, ieee80211); #endif return (0); } static void wlan_clone_destroy(struct ifnet *ifp) { struct ieee80211vap *vap = ifp->if_softc; struct ieee80211com *ic = vap->iv_ic; ic->ic_vap_delete(vap); } void ieee80211_vap_destroy(struct ieee80211vap *vap) { CURVNET_SET(vap->iv_ifp->if_vnet); if_clone_destroyif(wlan_cloner, vap->iv_ifp); CURVNET_RESTORE(); } int ieee80211_sysctl_msecs_ticks(SYSCTL_HANDLER_ARGS) { int msecs = ticks_to_msecs(*(int *)arg1); int error; error = sysctl_handle_int(oidp, &msecs, 0, req); if (error || !req->newptr) return error; *(int *)arg1 = msecs_to_ticks(msecs); return 0; } static int ieee80211_sysctl_inact(SYSCTL_HANDLER_ARGS) { int inact = (*(int *)arg1) * IEEE80211_INACT_WAIT; int error; error = sysctl_handle_int(oidp, &inact, 0, req); if (error || !req->newptr) return error; *(int *)arg1 = inact / IEEE80211_INACT_WAIT; return 0; } static int ieee80211_sysctl_parent(SYSCTL_HANDLER_ARGS) { struct ieee80211com *ic = arg1; return SYSCTL_OUT_STR(req, ic->ic_name); } static int ieee80211_sysctl_radar(SYSCTL_HANDLER_ARGS) { struct ieee80211com *ic = arg1; int t = 0, error; error = sysctl_handle_int(oidp, &t, 0, req); if (error || !req->newptr) return error; IEEE80211_LOCK(ic); ieee80211_dfs_notify_radar(ic, ic->ic_curchan); IEEE80211_UNLOCK(ic); return 0; } /* * For now, just restart everything. * * Later on, it'd be nice to have a separate VAP restart to * full-device restart. */ static int ieee80211_sysctl_vap_restart(SYSCTL_HANDLER_ARGS) { struct ieee80211vap *vap = arg1; int t = 0, error; error = sysctl_handle_int(oidp, &t, 0, req); if (error || !req->newptr) return error; ieee80211_restart_all(vap->iv_ic); return 0; } void ieee80211_sysctl_attach(struct ieee80211com *ic) { } void ieee80211_sysctl_detach(struct ieee80211com *ic) { } void ieee80211_sysctl_vattach(struct ieee80211vap *vap) { struct ifnet *ifp = vap->iv_ifp; struct sysctl_ctx_list *ctx; struct sysctl_oid *oid; char num[14]; /* sufficient for 32 bits */ ctx = (struct sysctl_ctx_list *) IEEE80211_MALLOC(sizeof(struct sysctl_ctx_list), M_DEVBUF, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); if (ctx == NULL) { if_printf(ifp, "%s: cannot allocate sysctl context!\n", __func__); return; } sysctl_ctx_init(ctx); snprintf(num, sizeof(num), "%u", ifp->if_dunit); oid = SYSCTL_ADD_NODE(ctx, &SYSCTL_NODE_CHILDREN(_net, wlan), OID_AUTO, num, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, ""); SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "%parent", CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT, vap->iv_ic, 0, ieee80211_sysctl_parent, "A", "parent device"); SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "driver_caps", CTLFLAG_RW, &vap->iv_caps, 0, "driver capabilities"); #ifdef IEEE80211_DEBUG vap->iv_debug = ieee80211_debug; SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "debug", CTLFLAG_RW, &vap->iv_debug, 0, "control debugging printfs"); #endif SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "bmiss_max", CTLFLAG_RW, &vap->iv_bmiss_max, 0, "consecutive beacon misses before scanning"); /* XXX inherit from tunables */ SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "inact_run", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, &vap->iv_inact_run, 0, ieee80211_sysctl_inact, "I", "station inactivity timeout (sec)"); SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "inact_probe", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, &vap->iv_inact_probe, 0, ieee80211_sysctl_inact, "I", "station inactivity probe timeout (sec)"); SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "inact_auth", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, &vap->iv_inact_auth, 0, ieee80211_sysctl_inact, "I", "station authentication timeout (sec)"); SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "inact_init", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, &vap->iv_inact_init, 0, ieee80211_sysctl_inact, "I", "station initial state timeout (sec)"); if (vap->iv_htcaps & IEEE80211_HTC_HT) { SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "ampdu_mintraffic_bk", CTLFLAG_RW, &vap->iv_ampdu_mintraffic[WME_AC_BK], 0, "BK traffic tx aggr threshold (pps)"); SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "ampdu_mintraffic_be", CTLFLAG_RW, &vap->iv_ampdu_mintraffic[WME_AC_BE], 0, "BE traffic tx aggr threshold (pps)"); SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "ampdu_mintraffic_vo", CTLFLAG_RW, &vap->iv_ampdu_mintraffic[WME_AC_VO], 0, "VO traffic tx aggr threshold (pps)"); SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "ampdu_mintraffic_vi", CTLFLAG_RW, &vap->iv_ampdu_mintraffic[WME_AC_VI], 0, "VI traffic tx aggr threshold (pps)"); } SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "force_restart", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, vap, 0, ieee80211_sysctl_vap_restart, "I", "force a VAP restart"); if (vap->iv_caps & IEEE80211_C_DFS) { SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "radar", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, vap->iv_ic, 0, ieee80211_sysctl_radar, "I", "simulate radar event"); } vap->iv_sysctl = ctx; vap->iv_oid = oid; } void ieee80211_sysctl_vdetach(struct ieee80211vap *vap) { if (vap->iv_sysctl != NULL) { sysctl_ctx_free(vap->iv_sysctl); IEEE80211_FREE(vap->iv_sysctl, M_DEVBUF); vap->iv_sysctl = NULL; } } int ieee80211_com_vincref(struct ieee80211vap *vap) { uint32_t ostate; ostate = atomic_fetchadd_32(&vap->iv_com_state, IEEE80211_COM_REF_ADD); if (ostate & IEEE80211_COM_DETACHED) { atomic_subtract_32(&vap->iv_com_state, IEEE80211_COM_REF_ADD); return (ENETDOWN); } if (_IEEE80211_MASKSHIFT(ostate, IEEE80211_COM_REF) == IEEE80211_COM_REF_MAX) { atomic_subtract_32(&vap->iv_com_state, IEEE80211_COM_REF_ADD); return (EOVERFLOW); } return (0); } void ieee80211_com_vdecref(struct ieee80211vap *vap) { uint32_t ostate; ostate = atomic_fetchadd_32(&vap->iv_com_state, -IEEE80211_COM_REF_ADD); KASSERT(_IEEE80211_MASKSHIFT(ostate, IEEE80211_COM_REF) != 0, ("com reference counter underflow")); (void) ostate; } void ieee80211_com_vdetach(struct ieee80211vap *vap) { int sleep_time; sleep_time = msecs_to_ticks(250); atomic_set_32(&vap->iv_com_state, IEEE80211_COM_DETACHED); while (_IEEE80211_MASKSHIFT(atomic_load_32(&vap->iv_com_state), IEEE80211_COM_REF) != 0) pause("comref", sleep_time); } int ieee80211_node_dectestref(struct ieee80211_node *ni) { /* XXX need equivalent of atomic_dec_and_test */ atomic_subtract_int(&ni->ni_refcnt, 1); return atomic_cmpset_int(&ni->ni_refcnt, 0, 1); } void ieee80211_drain_ifq(struct ifqueue *ifq) { struct ieee80211_node *ni; struct mbuf *m; for (;;) { IF_DEQUEUE(ifq, m); if (m == NULL) break; ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; KASSERT(ni != NULL, ("frame w/o node")); ieee80211_free_node(ni); m->m_pkthdr.rcvif = NULL; m_freem(m); } } void ieee80211_flush_ifq(struct ifqueue *ifq, struct ieee80211vap *vap) { struct ieee80211_node *ni; struct mbuf *m, **mprev; IF_LOCK(ifq); mprev = &ifq->ifq_head; while ((m = *mprev) != NULL) { ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; if (ni != NULL && ni->ni_vap == vap) { *mprev = m->m_nextpkt; /* remove from list */ ifq->ifq_len--; m_freem(m); ieee80211_free_node(ni); /* reclaim ref */ } else mprev = &m->m_nextpkt; } /* recalculate tail ptr */ m = ifq->ifq_head; for (; m != NULL && m->m_nextpkt != NULL; m = m->m_nextpkt) ; ifq->ifq_tail = m; IF_UNLOCK(ifq); } /* * As above, for mbufs allocated with m_gethdr/MGETHDR * or initialized by M_COPY_PKTHDR. */ #define MC_ALIGN(m, len) \ do { \ (m)->m_data += rounddown2(MCLBYTES - (len), sizeof(long)); \ } while (/* CONSTCOND */ 0) /* * Allocate and setup a management frame of the specified * size. We return the mbuf and a pointer to the start * of the contiguous data area that's been reserved based * on the packet length. The data area is forced to 32-bit * alignment and the buffer length to a multiple of 4 bytes. * This is done mainly so beacon frames (that require this) * can use this interface too. */ struct mbuf * ieee80211_getmgtframe(uint8_t **frm, int headroom, int pktlen) { struct mbuf *m; u_int len; /* * NB: we know the mbuf routines will align the data area * so we don't need to do anything special. */ len = roundup2(headroom + pktlen, 4); KASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len)); if (len < MINCLSIZE) { m = m_gethdr(M_NOWAIT, MT_DATA); /* * Align the data in case additional headers are added. * This should only happen when a WEP header is added * which only happens for shared key authentication mgt * frames which all fit in MHLEN. */ if (m != NULL) M_ALIGN(m, len); } else { m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); if (m != NULL) MC_ALIGN(m, len); } if (m != NULL) { m->m_data += headroom; *frm = m->m_data; } return m; } #ifndef __NO_STRICT_ALIGNMENT /* * Re-align the payload in the mbuf. This is mainly used (right now) * to handle IP header alignment requirements on certain architectures. */ struct mbuf * ieee80211_realign(struct ieee80211vap *vap, struct mbuf *m, size_t align) { int pktlen, space; struct mbuf *n; pktlen = m->m_pkthdr.len; space = pktlen + align; if (space < MINCLSIZE) n = m_gethdr(M_NOWAIT, MT_DATA); else { n = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, space <= MCLBYTES ? MCLBYTES : #if MJUMPAGESIZE != MCLBYTES space <= MJUMPAGESIZE ? MJUMPAGESIZE : #endif space <= MJUM9BYTES ? MJUM9BYTES : MJUM16BYTES); } if (__predict_true(n != NULL)) { m_move_pkthdr(n, m); n->m_data = (caddr_t)(ALIGN(n->m_data + align) - align); m_copydata(m, 0, pktlen, mtod(n, caddr_t)); n->m_len = pktlen; } else { IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, mtod(m, const struct ieee80211_frame *), NULL, "%s", "no mbuf to realign"); vap->iv_stats.is_rx_badalign++; } m_freem(m); return n; } #endif /* !__NO_STRICT_ALIGNMENT */ int ieee80211_add_callback(struct mbuf *m, void (*func)(struct ieee80211_node *, void *, int), void *arg) { struct m_tag *mtag; struct ieee80211_cb *cb; mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, sizeof(struct ieee80211_cb), M_NOWAIT); if (mtag == NULL) return 0; cb = (struct ieee80211_cb *)(mtag+1); cb->func = func; cb->arg = arg; m_tag_prepend(m, mtag); m->m_flags |= M_TXCB; return 1; } int ieee80211_add_xmit_params(struct mbuf *m, const struct ieee80211_bpf_params *params) { struct m_tag *mtag; struct ieee80211_tx_params *tx; mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_XMIT_PARAMS, sizeof(struct ieee80211_tx_params), M_NOWAIT); if (mtag == NULL) return (0); tx = (struct ieee80211_tx_params *)(mtag+1); memcpy(&tx->params, params, sizeof(struct ieee80211_bpf_params)); m_tag_prepend(m, mtag); return (1); } int ieee80211_get_xmit_params(struct mbuf *m, struct ieee80211_bpf_params *params) { struct m_tag *mtag; struct ieee80211_tx_params *tx; mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_XMIT_PARAMS, NULL); if (mtag == NULL) return (-1); tx = (struct ieee80211_tx_params *)(mtag + 1); memcpy(params, &tx->params, sizeof(struct ieee80211_bpf_params)); return (0); } void ieee80211_process_callback(struct ieee80211_node *ni, struct mbuf *m, int status) { struct m_tag *mtag; mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, NULL); if (mtag != NULL) { struct ieee80211_cb *cb = (struct ieee80211_cb *)(mtag+1); cb->func(ni, cb->arg, status); } } /* * Add RX parameters to the given mbuf. * * Returns 1 if OK, 0 on error. */ int ieee80211_add_rx_params(struct mbuf *m, const struct ieee80211_rx_stats *rxs) { struct m_tag *mtag; struct ieee80211_rx_params *rx; mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_RECV_PARAMS, sizeof(struct ieee80211_rx_stats), M_NOWAIT); if (mtag == NULL) return (0); rx = (struct ieee80211_rx_params *)(mtag + 1); memcpy(&rx->params, rxs, sizeof(*rxs)); m_tag_prepend(m, mtag); return (1); } int ieee80211_get_rx_params(struct mbuf *m, struct ieee80211_rx_stats *rxs) { struct m_tag *mtag; struct ieee80211_rx_params *rx; mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_RECV_PARAMS, NULL); if (mtag == NULL) return (-1); rx = (struct ieee80211_rx_params *)(mtag + 1); memcpy(rxs, &rx->params, sizeof(*rxs)); return (0); } const struct ieee80211_rx_stats * ieee80211_get_rx_params_ptr(struct mbuf *m) { struct m_tag *mtag; struct ieee80211_rx_params *rx; mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_RECV_PARAMS, NULL); if (mtag == NULL) return (NULL); rx = (struct ieee80211_rx_params *)(mtag + 1); return (&rx->params); } /* * Add TOA parameters to the given mbuf. */ int ieee80211_add_toa_params(struct mbuf *m, const struct ieee80211_toa_params *p) { struct m_tag *mtag; struct ieee80211_toa_params *rp; mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_TOA_PARAMS, sizeof(struct ieee80211_toa_params), M_NOWAIT); if (mtag == NULL) return (0); rp = (struct ieee80211_toa_params *)(mtag + 1); memcpy(rp, p, sizeof(*rp)); m_tag_prepend(m, mtag); return (1); } int ieee80211_get_toa_params(struct mbuf *m, struct ieee80211_toa_params *p) { struct m_tag *mtag; struct ieee80211_toa_params *rp; mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_TOA_PARAMS, NULL); if (mtag == NULL) return (0); rp = (struct ieee80211_toa_params *)(mtag + 1); if (p != NULL) memcpy(p, rp, sizeof(*p)); return (1); } /* * Transmit a frame to the parent interface. */ int ieee80211_parent_xmitpkt(struct ieee80211com *ic, struct mbuf *m) { int error; /* * Assert the IC TX lock is held - this enforces the * processing -> queuing order is maintained */ IEEE80211_TX_LOCK_ASSERT(ic); error = ic->ic_transmit(ic, m); if (error) { struct ieee80211_node *ni; ni = (struct ieee80211_node *)m->m_pkthdr.rcvif; /* XXX number of fragments */ if_inc_counter(ni->ni_vap->iv_ifp, IFCOUNTER_OERRORS, 1); ieee80211_free_node(ni); ieee80211_free_mbuf(m); } return (error); } /* * Transmit a frame to the VAP interface. */ int ieee80211_vap_xmitpkt(struct ieee80211vap *vap, struct mbuf *m) { struct ifnet *ifp = vap->iv_ifp; /* * When transmitting via the VAP, we shouldn't hold * any IC TX lock as the VAP TX path will acquire it. */ IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); return (ifp->if_transmit(ifp, m)); } #include void -get_random_bytes(void *p, size_t n) +net80211_get_random_bytes(void *p, size_t n) { uint8_t *dp = p; while (n > 0) { uint32_t v = arc4random(); size_t nb = n > sizeof(uint32_t) ? sizeof(uint32_t) : n; bcopy(&v, dp, n > sizeof(uint32_t) ? sizeof(uint32_t) : n); dp += sizeof(uint32_t), n -= nb; } } /* * Helper function for events that pass just a single mac address. */ static void notify_macaddr(struct ifnet *ifp, int op, const uint8_t mac[IEEE80211_ADDR_LEN]) { struct ieee80211_join_event iev; CURVNET_SET(ifp->if_vnet); memset(&iev, 0, sizeof(iev)); IEEE80211_ADDR_COPY(iev.iev_addr, mac); rt_ieee80211msg(ifp, op, &iev, sizeof(iev)); CURVNET_RESTORE(); } void ieee80211_notify_node_join(struct ieee80211_node *ni, int newassoc) { struct ieee80211vap *vap = ni->ni_vap; struct ifnet *ifp = vap->iv_ifp; CURVNET_SET_QUIET(ifp->if_vnet); IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode join", (ni == vap->iv_bss) ? "bss " : ""); if (ni == vap->iv_bss) { notify_macaddr(ifp, newassoc ? RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC, ni->ni_bssid); if_link_state_change(ifp, LINK_STATE_UP); } else { notify_macaddr(ifp, newassoc ? RTM_IEEE80211_JOIN : RTM_IEEE80211_REJOIN, ni->ni_macaddr); } CURVNET_RESTORE(); } void ieee80211_notify_node_leave(struct ieee80211_node *ni) { struct ieee80211vap *vap = ni->ni_vap; struct ifnet *ifp = vap->iv_ifp; CURVNET_SET_QUIET(ifp->if_vnet); IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode leave", (ni == vap->iv_bss) ? "bss " : ""); if (ni == vap->iv_bss) { rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0); if_link_state_change(ifp, LINK_STATE_DOWN); } else { /* fire off wireless event station leaving */ notify_macaddr(ifp, RTM_IEEE80211_LEAVE, ni->ni_macaddr); } CURVNET_RESTORE(); } void ieee80211_notify_scan_done(struct ieee80211vap *vap) { struct ifnet *ifp = vap->iv_ifp; IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s\n", "notify scan done"); /* dispatch wireless event indicating scan completed */ CURVNET_SET(ifp->if_vnet); rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0); CURVNET_RESTORE(); } void ieee80211_notify_replay_failure(struct ieee80211vap *vap, const struct ieee80211_frame *wh, const struct ieee80211_key *k, u_int64_t rsc, int tid) { struct ifnet *ifp = vap->iv_ifp; IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, "%s replay detected tid %d ", k->wk_cipher->ic_name, tid, (intmax_t) rsc, (intmax_t) rsc, (intmax_t) k->wk_keyrsc[tid], (intmax_t) k->wk_keyrsc[tid], k->wk_keyix, k->wk_rxkeyix); if (ifp != NULL) { /* NB: for cipher test modules */ struct ieee80211_replay_event iev; IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); iev.iev_cipher = k->wk_cipher->ic_cipher; if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE) iev.iev_keyix = k->wk_rxkeyix; else iev.iev_keyix = k->wk_keyix; iev.iev_keyrsc = k->wk_keyrsc[tid]; iev.iev_rsc = rsc; CURVNET_SET(ifp->if_vnet); rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev)); CURVNET_RESTORE(); } } void ieee80211_notify_michael_failure(struct ieee80211vap *vap, const struct ieee80211_frame *wh, u_int keyix) { struct ifnet *ifp = vap->iv_ifp; IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2, "michael MIC verification failed ", keyix); vap->iv_stats.is_rx_tkipmic++; if (ifp != NULL) { /* NB: for cipher test modules */ struct ieee80211_michael_event iev; IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1); IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2); iev.iev_cipher = IEEE80211_CIPHER_TKIP; iev.iev_keyix = keyix; CURVNET_SET(ifp->if_vnet); rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev)); CURVNET_RESTORE(); } } void ieee80211_notify_wds_discover(struct ieee80211_node *ni) { struct ieee80211vap *vap = ni->ni_vap; struct ifnet *ifp = vap->iv_ifp; notify_macaddr(ifp, RTM_IEEE80211_WDS, ni->ni_macaddr); } void ieee80211_notify_csa(struct ieee80211com *ic, const struct ieee80211_channel *c, int mode, int count) { struct ieee80211_csa_event iev; struct ieee80211vap *vap; struct ifnet *ifp; memset(&iev, 0, sizeof(iev)); iev.iev_flags = c->ic_flags; iev.iev_freq = c->ic_freq; iev.iev_ieee = c->ic_ieee; iev.iev_mode = mode; iev.iev_count = count; TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { ifp = vap->iv_ifp; CURVNET_SET(ifp->if_vnet); rt_ieee80211msg(ifp, RTM_IEEE80211_CSA, &iev, sizeof(iev)); CURVNET_RESTORE(); } } void ieee80211_notify_radar(struct ieee80211com *ic, const struct ieee80211_channel *c) { struct ieee80211_radar_event iev; struct ieee80211vap *vap; struct ifnet *ifp; memset(&iev, 0, sizeof(iev)); iev.iev_flags = c->ic_flags; iev.iev_freq = c->ic_freq; iev.iev_ieee = c->ic_ieee; TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { ifp = vap->iv_ifp; CURVNET_SET(ifp->if_vnet); rt_ieee80211msg(ifp, RTM_IEEE80211_RADAR, &iev, sizeof(iev)); CURVNET_RESTORE(); } } void ieee80211_notify_cac(struct ieee80211com *ic, const struct ieee80211_channel *c, enum ieee80211_notify_cac_event type) { struct ieee80211_cac_event iev; struct ieee80211vap *vap; struct ifnet *ifp; memset(&iev, 0, sizeof(iev)); iev.iev_flags = c->ic_flags; iev.iev_freq = c->ic_freq; iev.iev_ieee = c->ic_ieee; iev.iev_type = type; TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { ifp = vap->iv_ifp; CURVNET_SET(ifp->if_vnet); rt_ieee80211msg(ifp, RTM_IEEE80211_CAC, &iev, sizeof(iev)); CURVNET_RESTORE(); } } void ieee80211_notify_node_deauth(struct ieee80211_node *ni) { struct ieee80211vap *vap = ni->ni_vap; struct ifnet *ifp = vap->iv_ifp; IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node deauth"); notify_macaddr(ifp, RTM_IEEE80211_DEAUTH, ni->ni_macaddr); } void ieee80211_notify_node_auth(struct ieee80211_node *ni) { struct ieee80211vap *vap = ni->ni_vap; struct ifnet *ifp = vap->iv_ifp; IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node auth"); notify_macaddr(ifp, RTM_IEEE80211_AUTH, ni->ni_macaddr); } void ieee80211_notify_country(struct ieee80211vap *vap, const uint8_t bssid[IEEE80211_ADDR_LEN], const uint8_t cc[2]) { struct ifnet *ifp = vap->iv_ifp; struct ieee80211_country_event iev; memset(&iev, 0, sizeof(iev)); IEEE80211_ADDR_COPY(iev.iev_addr, bssid); iev.iev_cc[0] = cc[0]; iev.iev_cc[1] = cc[1]; CURVNET_SET(ifp->if_vnet); rt_ieee80211msg(ifp, RTM_IEEE80211_COUNTRY, &iev, sizeof(iev)); CURVNET_RESTORE(); } void ieee80211_notify_radio(struct ieee80211com *ic, int state) { struct ieee80211_radio_event iev; struct ieee80211vap *vap; struct ifnet *ifp; memset(&iev, 0, sizeof(iev)); iev.iev_state = state; TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { ifp = vap->iv_ifp; CURVNET_SET(ifp->if_vnet); rt_ieee80211msg(ifp, RTM_IEEE80211_RADIO, &iev, sizeof(iev)); CURVNET_RESTORE(); } } void ieee80211_notify_ifnet_change(struct ieee80211vap *vap) { struct ifnet *ifp = vap->iv_ifp; IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG, "%s\n", "interface state change"); CURVNET_SET(ifp->if_vnet); rt_ifmsg(ifp); CURVNET_RESTORE(); } void ieee80211_load_module(const char *modname) { #ifdef notyet (void)kern_kldload(curthread, modname, NULL); #else printf("%s: load the %s module by hand for now.\n", __func__, modname); #endif } static eventhandler_tag wlan_bpfevent; static eventhandler_tag wlan_ifllevent; static void bpf_track(void *arg, struct ifnet *ifp, int dlt, int attach) { /* NB: identify vap's by if_init */ if (dlt == DLT_IEEE802_11_RADIO && ifp->if_init == ieee80211_init) { struct ieee80211vap *vap = ifp->if_softc; /* * Track bpf radiotap listener state. We mark the vap * to indicate if any listener is present and the com * to indicate if any listener exists on any associated * vap. This flag is used by drivers to prepare radiotap * state only when needed. */ if (attach) { ieee80211_syncflag_ext(vap, IEEE80211_FEXT_BPF); if (vap->iv_opmode == IEEE80211_M_MONITOR) atomic_add_int(&vap->iv_ic->ic_montaps, 1); } else if (!bpf_peers_present(vap->iv_rawbpf)) { ieee80211_syncflag_ext(vap, -IEEE80211_FEXT_BPF); if (vap->iv_opmode == IEEE80211_M_MONITOR) atomic_subtract_int(&vap->iv_ic->ic_montaps, 1); } } } /* * Change MAC address on the vap (if was not started). */ static void wlan_iflladdr(void *arg __unused, struct ifnet *ifp) { /* NB: identify vap's by if_init */ if (ifp->if_init == ieee80211_init && (ifp->if_flags & IFF_UP) == 0) { struct ieee80211vap *vap = ifp->if_softc; IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp)); } } /* * Fetch the VAP name. * * This returns a const char pointer suitable for debugging, * but don't expect it to stick around for much longer. */ const char * ieee80211_get_vap_ifname(struct ieee80211vap *vap) { if (vap->iv_ifp == NULL) return "(none)"; return vap->iv_ifp->if_xname; } #ifdef DEBUGNET static void ieee80211_debugnet_init(struct ifnet *ifp, int *nrxr, int *ncl, int *clsize) { struct ieee80211vap *vap; struct ieee80211com *ic; vap = if_getsoftc(ifp); ic = vap->iv_ic; IEEE80211_LOCK(ic); ic->ic_debugnet_meth->dn8_init(ic, nrxr, ncl, clsize); IEEE80211_UNLOCK(ic); } static void ieee80211_debugnet_event(struct ifnet *ifp, enum debugnet_ev ev) { struct ieee80211vap *vap; struct ieee80211com *ic; vap = if_getsoftc(ifp); ic = vap->iv_ic; IEEE80211_LOCK(ic); ic->ic_debugnet_meth->dn8_event(ic, ev); IEEE80211_UNLOCK(ic); } static int ieee80211_debugnet_transmit(struct ifnet *ifp, struct mbuf *m) { return (ieee80211_vap_transmit(ifp, m)); } static int ieee80211_debugnet_poll(struct ifnet *ifp, int count) { struct ieee80211vap *vap; struct ieee80211com *ic; vap = if_getsoftc(ifp); ic = vap->iv_ic; return (ic->ic_debugnet_meth->dn8_poll(ic, count)); } #endif /* * Module glue. * * NB: the module name is "wlan" for compatibility with NetBSD. */ static int wlan_modevent(module_t mod, int type, void *unused) { switch (type) { case MOD_LOAD: if (bootverbose) printf("wlan: <802.11 Link Layer>\n"); wlan_bpfevent = EVENTHANDLER_REGISTER(bpf_track, bpf_track, 0, EVENTHANDLER_PRI_ANY); wlan_ifllevent = EVENTHANDLER_REGISTER(iflladdr_event, wlan_iflladdr, NULL, EVENTHANDLER_PRI_ANY); wlan_cloner = if_clone_simple(wlanname, wlan_clone_create, wlan_clone_destroy, 0); return 0; case MOD_UNLOAD: if_clone_detach(wlan_cloner); EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent); EVENTHANDLER_DEREGISTER(iflladdr_event, wlan_ifllevent); return 0; } return EINVAL; } static moduledata_t wlan_mod = { wlanname, wlan_modevent, 0 }; DECLARE_MODULE(wlan, wlan_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); MODULE_VERSION(wlan, 1); MODULE_DEPEND(wlan, ether, 1, 1, 1); #ifdef IEEE80211_ALQ MODULE_DEPEND(wlan, alq, 1, 1, 1); #endif /* IEEE80211_ALQ */ diff --git a/sys/net80211/ieee80211_freebsd.h b/sys/net80211/ieee80211_freebsd.h index c3811cc32e84..9d7b9cbb7cce 100644 --- a/sys/net80211/ieee80211_freebsd.h +++ b/sys/net80211/ieee80211_freebsd.h @@ -1,722 +1,722 @@ /*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * 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 #include #include #include #include #include #include /* * priv(9) NET80211 checks. */ struct ieee80211vap; int ieee80211_priv_check_vap_getkey(u_long, struct ieee80211vap *, struct ifnet *); int ieee80211_priv_check_vap_manage(u_long, struct ieee80211vap *, struct ifnet *); int ieee80211_priv_check_vap_setmac(u_long, struct ieee80211vap *, struct ifnet *); int ieee80211_priv_check_create_vap(u_long, struct ieee80211vap *, struct ifnet *); /* * 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) #define IEEE80211_UNLOCK_ASSERT(_ic) \ mtx_assert(IEEE80211_LOCK_OBJ(_ic), MA_NOTOWNED) /* * Transmit lock. * * This is a (mostly) temporary lock designed to serialise all of the * transmission operations throughout the stack. */ typedef struct { char name[16]; /* e.g. "ath0_tx_lock" */ struct mtx mtx; } ieee80211_tx_lock_t; #define IEEE80211_TX_LOCK_INIT(_ic, _name) do { \ ieee80211_tx_lock_t *cl = &(_ic)->ic_txlock; \ snprintf(cl->name, sizeof(cl->name), "%s_tx_lock", _name); \ mtx_init(&cl->mtx, cl->name, NULL, MTX_DEF); \ } while (0) #define IEEE80211_TX_LOCK_OBJ(_ic) (&(_ic)->ic_txlock.mtx) #define IEEE80211_TX_LOCK_DESTROY(_ic) mtx_destroy(IEEE80211_TX_LOCK_OBJ(_ic)) #define IEEE80211_TX_LOCK(_ic) mtx_lock(IEEE80211_TX_LOCK_OBJ(_ic)) #define IEEE80211_TX_UNLOCK(_ic) mtx_unlock(IEEE80211_TX_LOCK_OBJ(_ic)) #define IEEE80211_TX_LOCK_ASSERT(_ic) \ mtx_assert(IEEE80211_TX_LOCK_OBJ(_ic), MA_OWNED) #define IEEE80211_TX_UNLOCK_ASSERT(_ic) \ mtx_assert(IEEE80211_TX_LOCK_OBJ(_ic), MA_NOTOWNED) /* * Stageq / ni_tx_superg lock */ typedef struct { char name[16]; /* e.g. "ath0_ff_lock" */ struct mtx mtx; } ieee80211_ff_lock_t; #define IEEE80211_FF_LOCK_INIT(_ic, _name) do { \ ieee80211_ff_lock_t *fl = &(_ic)->ic_fflock; \ snprintf(fl->name, sizeof(fl->name), "%s_ff_lock", _name); \ mtx_init(&fl->mtx, fl->name, NULL, MTX_DEF); \ } while (0) #define IEEE80211_FF_LOCK_OBJ(_ic) (&(_ic)->ic_fflock.mtx) #define IEEE80211_FF_LOCK_DESTROY(_ic) mtx_destroy(IEEE80211_FF_LOCK_OBJ(_ic)) #define IEEE80211_FF_LOCK(_ic) mtx_lock(IEEE80211_FF_LOCK_OBJ(_ic)) #define IEEE80211_FF_UNLOCK(_ic) mtx_unlock(IEEE80211_FF_LOCK_OBJ(_ic)) #define IEEE80211_FF_LOCK_ASSERT(_ic) \ mtx_assert(IEEE80211_FF_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) /* * Power-save queue definitions. */ typedef struct mtx ieee80211_psq_lock_t; #define IEEE80211_PSQ_INIT(_psq, _name) \ mtx_init(&(_psq)->psq_lock, _name, "802.11 ps q", MTX_DEF) #define IEEE80211_PSQ_DESTROY(_psq) mtx_destroy(&(_psq)->psq_lock) #define IEEE80211_PSQ_LOCK(_psq) mtx_lock(&(_psq)->psq_lock) #define IEEE80211_PSQ_UNLOCK(_psq) mtx_unlock(&(_psq)->psq_lock) #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 */ /* * Age queue definitions. */ typedef struct mtx ieee80211_ageq_lock_t; #define IEEE80211_AGEQ_INIT(_aq, _name) \ mtx_init(&(_aq)->aq_lock, _name, "802.11 age q", MTX_DEF) #define IEEE80211_AGEQ_DESTROY(_aq) mtx_destroy(&(_aq)->aq_lock) #define IEEE80211_AGEQ_LOCK(_aq) mtx_lock(&(_aq)->aq_lock) #define IEEE80211_AGEQ_UNLOCK(_aq) mtx_unlock(&(_aq)->aq_lock) /* * 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) /* * Scan table definitions. */ typedef struct mtx ieee80211_scan_table_lock_t; #define IEEE80211_SCAN_TABLE_LOCK_INIT(_st, _name) \ mtx_init(&(_st)->st_lock, _name, "802.11 scan table", MTX_DEF) #define IEEE80211_SCAN_TABLE_LOCK_DESTROY(_st) mtx_destroy(&(_st)->st_lock) #define IEEE80211_SCAN_TABLE_LOCK(_st) mtx_lock(&(_st)->st_lock) #define IEEE80211_SCAN_TABLE_UNLOCK(_st) mtx_unlock(&(_st)->st_lock) typedef struct mtx ieee80211_scan_iter_lock_t; #define IEEE80211_SCAN_ITER_LOCK_INIT(_st, _name) \ mtx_init(&(_st)->st_scanlock, _name, "802.11 scangen", MTX_DEF) #define IEEE80211_SCAN_ITER_LOCK_DESTROY(_st) mtx_destroy(&(_st)->st_scanlock) #define IEEE80211_SCAN_ITER_LOCK(_st) mtx_lock(&(_st)->st_scanlock) #define IEEE80211_SCAN_ITER_UNLOCK(_st) mtx_unlock(&(_st)->st_scanlock) /* * Mesh node/routing definitions. */ typedef struct mtx ieee80211_rte_lock_t; #define MESH_RT_ENTRY_LOCK_INIT(_rt, _name) \ mtx_init(&(rt)->rt_lock, _name, "802.11s route entry", MTX_DEF) #define MESH_RT_ENTRY_LOCK_DESTROY(_rt) \ mtx_destroy(&(_rt)->rt_lock) #define MESH_RT_ENTRY_LOCK(rt) mtx_lock(&(rt)->rt_lock) #define MESH_RT_ENTRY_LOCK_ASSERT(rt) mtx_assert(&(rt)->rt_lock, MA_OWNED) #define MESH_RT_ENTRY_UNLOCK(rt) mtx_unlock(&(rt)->rt_lock) typedef struct mtx ieee80211_rt_lock_t; #define MESH_RT_LOCK(ms) mtx_lock(&(ms)->ms_rt_lock) #define MESH_RT_LOCK_ASSERT(ms) mtx_assert(&(ms)->ms_rt_lock, MA_OWNED) #define MESH_RT_UNLOCK(ms) mtx_unlock(&(ms)->ms_rt_lock) #define MESH_RT_LOCK_INIT(ms, name) \ mtx_init(&(ms)->ms_rt_lock, name, "802.11s routing table", MTX_DEF) #define MESH_RT_LOCK_DESTROY(ms) \ mtx_destroy(&(ms)->ms_rt_lock) /* * 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 struct ieee80211vap; int ieee80211_com_vincref(struct ieee80211vap *); void ieee80211_com_vdecref(struct ieee80211vap *); void ieee80211_com_vdetach(struct ieee80211vap *); #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; void ieee80211_drain_ifq(struct ifqueue *); void ieee80211_flush_ifq(struct ifqueue *, struct ieee80211vap *); void ieee80211_vap_destroy(struct ieee80211vap *); const char * ieee80211_get_vap_ifname(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) MSEC_2_TICKS(ms) #define ticks_to_msecs(t) TICKS_2_MSEC(t) #define ticks_to_secs(t) ((t) / hz) #define ieee80211_time_after(a,b) ((int)(b) - (int)(a) < 0) #define ieee80211_time_before(a,b) ieee80211_time_after(b,a) #define ieee80211_time_after_eq(a,b) ((int)(a) - (int)(b) >= 0) #define ieee80211_time_before_eq(a,b) ieee80211_time_after_eq(b,a) struct mbuf *ieee80211_getmgtframe(uint8_t **frm, int headroom, int pktlen); /* tx path usage */ #define M_ENCAP M_PROTO1 /* 802.11 encap done */ #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 / A-MSDU */ #define M_TXCB M_PROTO7 /* do tx complete callback */ #define M_AMPDU_MPDU M_PROTO8 /* ok for A-MPDU aggregation */ #define M_FRAG M_PROTO9 /* frame fragmentation */ #define M_FIRSTFRAG M_PROTO10 /* first frame fragment */ #define M_LASTFRAG M_PROTO11 /* last frame fragment */ #define M_80211_TX \ (M_ENCAP|M_EAPOL|M_PWR_SAV|M_MORE_DATA|M_FF|M_TXCB| \ M_AMPDU_MPDU|M_FRAG|M_FIRSTFRAG|M_LASTFRAG) /* rx path usage */ #define M_AMPDU M_PROTO1 /* A-MPDU subframe */ #define M_WEP M_PROTO2 /* WEP done by hardware */ #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) #define IEEE80211_MBUF_TX_FLAG_BITS \ M_FLAG_BITS \ "\15M_ENCAP\17M_EAPOL\20M_PWR_SAV\21M_MORE_DATA\22M_FF\23M_TXCB" \ "\24M_AMPDU_MPDU\25M_FRAG\26M_FIRSTFRAG\27M_LASTFRAG" #define IEEE80211_MBUF_RX_FLAG_BITS \ M_FLAG_BITS \ "\15M_AMPDU\16M_WEP\24M_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) /* * Store the sequence number. */ #define M_SEQNO_SET(m, seqno) \ ((m)->m_pkthdr.tso_segsz = (seqno)) #define M_SEQNO_GET(m) ((m)->m_pkthdr.tso_segsz) #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); #define NET80211_TAG_XMIT_PARAMS 1 /* See below; this is after the bpf_params definition */ #define NET80211_TAG_RECV_PARAMS 2 #define NET80211_TAG_TOA_PARAMS 3 struct ieee80211com; int ieee80211_parent_xmitpkt(struct ieee80211com *, struct mbuf *); int ieee80211_vap_xmitpkt(struct ieee80211vap *, struct mbuf *); -void get_random_bytes(void *, size_t); +void net80211_get_random_bytes(void *, size_t); void ieee80211_sysctl_attach(struct ieee80211com *); void ieee80211_sysctl_detach(struct ieee80211com *); void ieee80211_sysctl_vattach(struct ieee80211vap *); void ieee80211_sysctl_vdetach(struct ieee80211vap *); SYSCTL_DECL(_net_wlan); int ieee80211_sysctl_msecs_ticks(SYSCTL_HANDLER_ARGS); 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_RATECTL_MODULE(alg, version) \ _IEEE80211_POLICY_MODULE(ratectl, alg, version); \ #define IEEE80211_RATECTL_ALG(name, alg, v) \ static void \ alg##_modevent(int type) \ { \ if (type == MOD_LOAD) \ ieee80211_ratectl_register(alg, &v); \ else \ ieee80211_ratectl_unregister(alg); \ } \ TEXT_SET(ratectl##_set, alg##_modevent) struct ieee80211req; typedef int ieee80211_ioctl_getfunc(struct ieee80211vap *, struct ieee80211req *); SET_DECLARE(ieee80211_ioctl_getset, ieee80211_ioctl_getfunc); #define IEEE80211_IOCTL_GET(_name, _get) TEXT_SET(ieee80211_ioctl_getset, _get) typedef int ieee80211_ioctl_setfunc(struct ieee80211vap *, struct ieee80211req *); SET_DECLARE(ieee80211_ioctl_setset, ieee80211_ioctl_setfunc); #define IEEE80211_IOCTL_SET(_name, _set) TEXT_SET(ieee80211_ioctl_setset, _set) #ifdef DEBUGNET typedef void debugnet80211_init_t(struct ieee80211com *, int *nrxr, int *ncl, int *clsize); typedef void debugnet80211_event_t(struct ieee80211com *, enum debugnet_ev); typedef int debugnet80211_poll_t(struct ieee80211com *, int); struct debugnet80211_methods { debugnet80211_init_t *dn8_init; debugnet80211_event_t *dn8_event; debugnet80211_poll_t *dn8_poll; }; #define DEBUGNET80211_DEFINE(driver) \ static debugnet80211_init_t driver##_debugnet80211_init; \ static debugnet80211_event_t driver##_debugnet80211_event; \ static debugnet80211_poll_t driver##_debugnet80211_poll; \ \ static struct debugnet80211_methods driver##_debugnet80211_methods = { \ .dn8_init = driver##_debugnet80211_init, \ .dn8_event = driver##_debugnet80211_event, \ .dn8_poll = driver##_debugnet80211_poll, \ } #define DEBUGNET80211_SET(ic, driver) \ (ic)->ic_debugnet_meth = &driver##_debugnet80211_methods #else #define DEBUGNET80211_DEFINE(driver) #define DEBUGNET80211_SET(ic, driver) #endif /* DEBUGNET */ #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 */ }; #ifdef _KERNEL struct ieee80211_tx_params { struct ieee80211_bpf_params params; }; int ieee80211_add_xmit_params(struct mbuf *m, const struct ieee80211_bpf_params *); int ieee80211_get_xmit_params(struct mbuf *m, struct ieee80211_bpf_params *); struct ieee80211_rx_params; struct ieee80211_rx_stats; int ieee80211_add_rx_params(struct mbuf *m, const struct ieee80211_rx_stats *rxs); int ieee80211_get_rx_params(struct mbuf *m, struct ieee80211_rx_stats *rxs); const struct ieee80211_rx_stats * ieee80211_get_rx_params_ptr(struct mbuf *m); struct ieee80211_toa_params { int request_id; }; int ieee80211_add_toa_params(struct mbuf *m, const struct ieee80211_toa_params *p); int ieee80211_get_toa_params(struct mbuf *m, struct ieee80211_toa_params *p); #define IEEE80211_F_SURVEY_TIME 0x00000001 #define IEEE80211_F_SURVEY_TIME_BUSY 0x00000002 #define IEEE80211_F_SURVEY_NOISE_DBM 0x00000004 #define IEEE80211_F_SURVEY_TSC 0x00000008 struct ieee80211_channel_survey { uint32_t s_flags; uint32_t s_time; uint32_t s_time_busy; int32_t s_noise; uint64_t s_tsc; }; #endif /* _KERNEL */ /* * Malloc API. Other BSD operating systems have slightly * different malloc/free namings (eg DragonflyBSD.) */ #define IEEE80211_MALLOC malloc #define IEEE80211_FREE free /* XXX TODO: get rid of WAITOK, fix all the users of it? */ #define IEEE80211_M_NOWAIT M_NOWAIT #define IEEE80211_M_WAITOK M_WAITOK #define IEEE80211_M_ZERO M_ZERO /* XXX TODO: the type fields */ #endif /* _NET80211_IEEE80211_FREEBSD_H_ */ diff --git a/sys/net80211/ieee80211_hostap.c b/sys/net80211/ieee80211_hostap.c index 8402ade857ff..16a3d97ae7f2 100644 --- a/sys/net80211/ieee80211_hostap.c +++ b/sys/net80211/ieee80211_hostap.c @@ -1,2460 +1,2460 @@ /*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include #ifdef __FreeBSD__ __FBSDID("$FreeBSD$"); #endif /* * IEEE 802.11 HOSTAP mode support. */ #include "opt_inet.h" #include "opt_wlan.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef IEEE80211_SUPPORT_SUPERG #include #endif #include #include #include /* for parse_wmeie */ #define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2) static void hostap_vattach(struct ieee80211vap *); static int hostap_newstate(struct ieee80211vap *, enum ieee80211_state, int); static int hostap_input(struct ieee80211_node *ni, struct mbuf *m, const struct ieee80211_rx_stats *, int rssi, int nf); static void hostap_deliver_data(struct ieee80211vap *, struct ieee80211_node *, struct mbuf *); static void hostap_recv_mgmt(struct ieee80211_node *, struct mbuf *, int subtype, const struct ieee80211_rx_stats *rxs, int rssi, int nf); static void hostap_recv_ctl(struct ieee80211_node *, struct mbuf *, int); void ieee80211_hostap_attach(struct ieee80211com *ic) { ic->ic_vattach[IEEE80211_M_HOSTAP] = hostap_vattach; } void ieee80211_hostap_detach(struct ieee80211com *ic) { } static void hostap_vdetach(struct ieee80211vap *vap) { } static void hostap_vattach(struct ieee80211vap *vap) { vap->iv_newstate = hostap_newstate; vap->iv_input = hostap_input; vap->iv_recv_mgmt = hostap_recv_mgmt; vap->iv_recv_ctl = hostap_recv_ctl; vap->iv_opdetach = hostap_vdetach; vap->iv_deliver_data = hostap_deliver_data; vap->iv_recv_pspoll = ieee80211_recv_pspoll; } static void sta_disassoc(void *arg, struct ieee80211_node *ni) { if (ni->ni_associd != 0) { IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DISASSOC, IEEE80211_REASON_ASSOC_LEAVE); ieee80211_node_leave(ni); } } static void sta_csa(void *arg, struct ieee80211_node *ni) { struct ieee80211vap *vap = ni->ni_vap; if (ni->ni_associd != 0) if (ni->ni_inact > vap->iv_inact_init) { ni->ni_inact = vap->iv_inact_init; IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, "%s: inact %u", __func__, ni->ni_inact); } } static void sta_drop(void *arg, struct ieee80211_node *ni) { if (ni->ni_associd != 0) ieee80211_node_leave(ni); } /* * Does a channel change require associated stations to re-associate * so protocol state is correct. This is used when doing CSA across * bands or similar (e.g. HT -> legacy). */ static int isbandchange(struct ieee80211com *ic) { return ((ic->ic_bsschan->ic_flags ^ ic->ic_csa_newchan->ic_flags) & (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_HALF | IEEE80211_CHAN_QUARTER | IEEE80211_CHAN_HT)) != 0; } /* * IEEE80211_M_HOSTAP vap state machine handler. */ static int hostap_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) { struct ieee80211com *ic = vap->iv_ic; enum ieee80211_state ostate; IEEE80211_LOCK_ASSERT(ic); ostate = vap->iv_state; IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", __func__, ieee80211_state_name[ostate], ieee80211_state_name[nstate], arg); vap->iv_state = nstate; /* state transition */ if (ostate != IEEE80211_S_SCAN) ieee80211_cancel_scan(vap); /* background scan */ switch (nstate) { case IEEE80211_S_INIT: switch (ostate) { case IEEE80211_S_SCAN: ieee80211_cancel_scan(vap); break; case IEEE80211_S_CAC: ieee80211_dfs_cac_stop(vap); break; case IEEE80211_S_RUN: ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, sta_disassoc, NULL); 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_vap(&ic->ic_sta, vap, sta_disassoc, NULL); /* * 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. */ vap->iv_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; vap->iv_flags_ht &= ~IEEE80211_FHT_NONHT_PR; /* XXX TODO: schedule deferred update? */ /* fall thru... */ case IEEE80211_S_CAC: /* * NB: We may get here because of a manual channel * change in which case we need to stop CAC * XXX no need to stop if ostate RUN but it's ok */ ieee80211_dfs_cac_stop(vap); /* fall thru... */ case IEEE80211_S_INIT: if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan)) { /* * Already have a channel; bypass the * scan and startup immediately. * ieee80211_create_ibss will call back to * move us to RUN state. */ ieee80211_create_ibss(vap, vap->iv_des_chan); break; } /* * Initiate a scan. We can come here as a result * of an IEEE80211_IOC_SCAN_REQ too in which case * the vap will be marked with IEEE80211_FEXT_SCANREQ * and the scan request parameters will be present * in iv_scanreq. Otherwise we do the default. */ if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { ieee80211_check_scan(vap, vap->iv_scanreq_flags, vap->iv_scanreq_duration, vap->iv_scanreq_mindwell, vap->iv_scanreq_maxdwell, vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; } else ieee80211_check_scan_current(vap); break; case IEEE80211_S_SCAN: /* * A state change requires a reset; scan. */ ieee80211_check_scan_current(vap); break; default: break; } break; case IEEE80211_S_CAC: /* * Start CAC on a DFS channel. We come here when starting * a bss on a DFS channel (see ieee80211_create_ibss). */ ieee80211_dfs_cac_start(vap); break; case IEEE80211_S_RUN: if (vap->iv_flags & IEEE80211_F_WPA) { /* XXX validate prerequisites */ } switch (ostate) { case IEEE80211_S_INIT: /* * Already have a channel; bypass the * scan and startup immediately. * Note that ieee80211_create_ibss will call * back to do a RUN->RUN state change. */ ieee80211_create_ibss(vap, ieee80211_ht_adjust_channel(ic, ic->ic_curchan, vap->iv_flags_ht)); /* NB: iv_bss is changed on return */ break; case IEEE80211_S_CAC: /* * NB: This is the normal state change when CAC * expires and no radar was detected; no need to * clear the CAC timer as it's already expired. */ /* fall thru... */ case IEEE80211_S_CSA: /* * Shorten inactivity timer of associated stations * to weed out sta's that don't follow a CSA. */ ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, sta_csa, NULL); /* * Update bss node channel to reflect where * we landed after CSA. */ ieee80211_node_set_chan(vap->iv_bss, ieee80211_ht_adjust_channel(ic, ic->ic_curchan, ieee80211_htchanflags(vap->iv_bss->ni_chan))); /* XXX bypass debug msgs */ break; case IEEE80211_S_SCAN: case IEEE80211_S_RUN: #ifdef IEEE80211_DEBUG if (ieee80211_msg_debug(vap)) { struct ieee80211_node *ni = vap->iv_bss; ieee80211_note(vap, "synchronized with %s ssid ", ether_sprintf(ni->ni_bssid)); ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); /* XXX MCS/HT */ printf(" channel %d start %uMb\n", ieee80211_chan2ieee(ic, ic->ic_curchan), IEEE80211_RATE2MBS(ni->ni_txrate)); } #endif break; default: break; } /* * Start/stop the authenticator. We delay until here * to allow configuration to happen out of order. */ if (vap->iv_auth->ia_attach != NULL) { /* XXX check failure */ vap->iv_auth->ia_attach(vap); } else if (vap->iv_auth->ia_detach != NULL) { vap->iv_auth->ia_detach(vap); } ieee80211_node_authorize(vap->iv_bss); break; case IEEE80211_S_CSA: if (ostate == IEEE80211_S_RUN && isbandchange(ic)) { /* * On a ``band change'' silently drop associated * stations as they must re-associate before they * can pass traffic (as otherwise protocol state * such as capabilities and the negotiated rate * set may/will be wrong). */ ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, sta_drop, NULL); } break; default: break; } return 0; } static void hostap_deliver_data(struct ieee80211vap *vap, struct ieee80211_node *ni, struct mbuf *m) { struct ether_header *eh = mtod(m, struct ether_header *); struct ifnet *ifp = vap->iv_ifp; /* clear driver/net80211 flags before passing up */ m->m_flags &= ~(M_MCAST | M_BCAST); m_clrprotoflags(m); KASSERT(vap->iv_opmode == IEEE80211_M_HOSTAP, ("gack, opmode %d", vap->iv_opmode)); /* * Do accounting. */ if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1); IEEE80211_NODE_STAT(ni, rx_data); IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len); if (ETHER_IS_MULTICAST(eh->ether_dhost)) { m->m_flags |= M_MCAST; /* XXX M_BCAST? */ IEEE80211_NODE_STAT(ni, rx_mcast); } else IEEE80211_NODE_STAT(ni, rx_ucast); /* perform as a bridge within the AP */ if ((vap->iv_flags & IEEE80211_F_NOBRIDGE) == 0) { struct mbuf *mcopy = NULL; if (m->m_flags & M_MCAST) { mcopy = m_dup(m, M_NOWAIT); if (mcopy == NULL) if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); else mcopy->m_flags |= M_MCAST; } else { /* * Check if the destination is associated with the * same vap and authorized to receive traffic. * Beware of traffic destined for the vap itself; * sending it will not work; just let it be delivered * normally. */ struct ieee80211_node *sta = ieee80211_find_vap_node( &vap->iv_ic->ic_sta, vap, eh->ether_dhost); if (sta != NULL) { if (ieee80211_node_is_authorized(sta)) { /* * Beware of sending to ourself; this * needs to happen via the normal * input path. */ if (sta != vap->iv_bss) { mcopy = m; m = NULL; } } else { vap->iv_stats.is_rx_unauth++; IEEE80211_NODE_STAT(sta, rx_unauth); } ieee80211_free_node(sta); } } if (mcopy != NULL) (void) ieee80211_vap_xmitpkt(vap, mcopy); } if (m != NULL) { /* * Mark frame as coming from vap's interface. */ m->m_pkthdr.rcvif = ifp; if (m->m_flags & M_MCAST) { /* * Spam DWDS vap's w/ multicast traffic. */ /* XXX only if dwds in use? */ ieee80211_dwds_mcast(vap, m); } if (ni->ni_vlan != 0) { /* attach vlan tag */ m->m_pkthdr.ether_vtag = ni->ni_vlan; m->m_flags |= M_VLANTAG; } ifp->if_input(ifp, m); } } /* * Decide if a received management frame should be * printed when debugging is enabled. This filters some * of the less interesting frames that come frequently * (e.g. beacons). */ static __inline int doprint(struct ieee80211vap *vap, int subtype) { switch (subtype) { case IEEE80211_FC0_SUBTYPE_BEACON: return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN); case IEEE80211_FC0_SUBTYPE_PROBE_REQ: return 0; } return 1; } /* * Process a received frame. The node associated with the sender * should be supplied. If nothing was found in the node table then * the caller is assumed to supply a reference to iv_bss instead. * The RSSI and a timestamp are also supplied. The RSSI data is used * during AP scanning to select a AP to associate with; it can have * any units so long as values have consistent units and higher values * mean ``better signal''. The receive timestamp is currently not used * by the 802.11 layer. */ static int hostap_input(struct ieee80211_node *ni, struct mbuf *m, const struct ieee80211_rx_stats *rxs, int rssi, int nf) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; struct ifnet *ifp = vap->iv_ifp; struct ieee80211_frame *wh; struct ieee80211_key *key; struct ether_header *eh; int hdrspace, need_tap = 1; /* mbuf need to be tapped. */ uint8_t dir, type, subtype, qos; uint8_t *bssid; int is_hw_decrypted = 0; int has_decrypted = 0; /* * Some devices do hardware decryption all the way through * to pretending the frame wasn't encrypted in the first place. * So, tag it appropriately so it isn't discarded inappropriately. */ if ((rxs != NULL) && (rxs->c_pktflags & IEEE80211_RX_F_DECRYPTED)) is_hw_decrypted = 1; if (m->m_flags & M_AMPDU_MPDU) { /* * Fastpath for A-MPDU reorder q resubmission. Frames * w/ M_AMPDU_MPDU marked have already passed through * here but were received out of order and been held on * the reorder queue. When resubmitted they are marked * with the M_AMPDU_MPDU flag and we can bypass most of * the normal processing. */ wh = mtod(m, struct ieee80211_frame *); type = IEEE80211_FC0_TYPE_DATA; dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; subtype = IEEE80211_FC0_SUBTYPE_QOS; hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ goto resubmit_ampdu; } KASSERT(ni != NULL, ("null node")); ni->ni_inact = ni->ni_inact_reload; type = -1; /* undefined */ if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, "too short (1): len %u", m->m_pkthdr.len); vap->iv_stats.is_rx_tooshort++; goto out; } /* * Bit of a cheat here, we use a pointer for a 3-address * frame format but don't reference fields past outside * ieee80211_frame_min w/o first validating the data is * present. */ wh = mtod(m, struct ieee80211_frame *); if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != IEEE80211_FC0_VERSION_0) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x", wh->i_fc[0], wh->i_fc[1]); vap->iv_stats.is_rx_badversion++; goto err; } dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { if (dir != IEEE80211_FC1_DIR_NODS) bssid = wh->i_addr1; else if (type == IEEE80211_FC0_TYPE_CTL) bssid = wh->i_addr1; else { if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, "too short (2): len %u", m->m_pkthdr.len); vap->iv_stats.is_rx_tooshort++; goto out; } bssid = wh->i_addr3; } /* * Validate the bssid. */ if (!(type == IEEE80211_FC0_TYPE_MGT && subtype == IEEE80211_FC0_SUBTYPE_BEACON) && !IEEE80211_ADDR_EQ(bssid, vap->iv_bss->ni_bssid) && !IEEE80211_ADDR_EQ(bssid, ifp->if_broadcastaddr)) { /* not interested in */ IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, bssid, NULL, "%s", "not to bss"); vap->iv_stats.is_rx_wrongbss++; goto out; } IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); ni->ni_noise = nf; if (IEEE80211_HAS_SEQ(type, subtype)) { uint8_t tid = ieee80211_gettid(wh); if (IEEE80211_QOS_HAS_SEQ(wh) && TID_TO_WME_AC(tid) >= WME_AC_VI) ic->ic_wme.wme_hipri_traffic++; if (! ieee80211_check_rxseq(ni, wh, bssid, rxs)) goto out; } } switch (type) { case IEEE80211_FC0_TYPE_DATA: hdrspace = ieee80211_hdrspace(ic, wh); if (m->m_len < hdrspace && (m = m_pullup(m, hdrspace)) == NULL) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, "data too short: expecting %u", hdrspace); vap->iv_stats.is_rx_tooshort++; goto out; /* XXX */ } if (!(dir == IEEE80211_FC1_DIR_TODS || (dir == IEEE80211_FC1_DIR_DSTODS && (vap->iv_flags & IEEE80211_F_DWDS)))) { if (dir != IEEE80211_FC1_DIR_DSTODS) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "data", "incorrect dir 0x%x", dir); } else { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT | IEEE80211_MSG_WDS, wh, "4-address data", "%s", "DWDS not enabled"); } vap->iv_stats.is_rx_wrongdir++; goto out; } /* check if source STA is associated */ if (ni == vap->iv_bss) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "data", "%s", "unknown src"); ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_DEAUTH, IEEE80211_REASON_NOT_AUTHED); vap->iv_stats.is_rx_notassoc++; goto err; } if (ni->ni_associd == 0) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "data", "%s", "unassoc src"); IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DISASSOC, IEEE80211_REASON_NOT_ASSOCED); vap->iv_stats.is_rx_notassoc++; goto err; } /* * Check for power save state change. * XXX out-of-order A-MPDU frames? */ if (((wh->i_fc[1] & IEEE80211_FC1_PWR_MGT) ^ (ni->ni_flags & IEEE80211_NODE_PWR_MGT))) vap->iv_node_ps(ni, wh->i_fc[1] & IEEE80211_FC1_PWR_MGT); /* * For 4-address packets handle WDS discovery * notifications. Once a WDS link is setup frames * are just delivered to the WDS vap (see below). */ if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap == NULL) { if (!ieee80211_node_is_authorized(ni)) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT | IEEE80211_MSG_WDS, wh, "4-address data", "%s", "unauthorized port"); vap->iv_stats.is_rx_unauth++; IEEE80211_NODE_STAT(ni, rx_unauth); goto err; } ieee80211_dwds_discover(ni, m); return type; } /* * Handle A-MPDU re-ordering. If the frame is to be * processed directly then ieee80211_ampdu_reorder * will return 0; otherwise it has consumed the mbuf * and we should do nothing more with it. */ if ((m->m_flags & M_AMPDU) && ieee80211_ampdu_reorder(ni, m, rxs) != 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 (is_hw_decrypted || wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { /* * Discard encrypted frames when privacy is off. */ IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "WEP", "%s", "PRIVACY off"); vap->iv_stats.is_rx_noprivacy++; IEEE80211_NODE_STAT(ni, rx_noprivacy); goto out; } if (ieee80211_crypto_decap(ni, m, hdrspace, &key) == 0) { /* NB: stats+msgs handled in crypto_decap */ IEEE80211_NODE_STAT(ni, rx_wepfail); goto out; } wh = mtod(m, struct ieee80211_frame *); wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; has_decrypted = 1; } 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 = ieee80211_getqos(wh)[0]; else qos = 0; /* * Next up, any fragmentation. */ if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { m = ieee80211_defrag(ni, m, hdrspace); if (m == NULL) { /* Fragment dropped or frame not complete yet */ goto out; } } wh = NULL; /* no longer valid, catch any uses */ /* * Next strip any MSDU crypto bits. */ if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, ni->ni_macaddr, "data", "%s", "demic error"); vap->iv_stats.is_rx_demicfail++; IEEE80211_NODE_STAT(ni, rx_demicfail); goto out; } /* copy to listener after decrypt */ if (ieee80211_radiotap_active_vap(vap)) ieee80211_radiotap_rx(vap, m); need_tap = 0; /* * Finally, strip the 802.11 header. */ m = ieee80211_decap(vap, m, hdrspace); if (m == NULL) { /* XXX mask bit to check for both */ /* don't count Null data frames as errors */ if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) goto out; IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, ni->ni_macaddr, "data", "%s", "decap error"); vap->iv_stats.is_rx_decap++; IEEE80211_NODE_STAT(ni, rx_decap); goto err; } eh = mtod(m, struct ether_header *); if (!ieee80211_node_is_authorized(ni)) { /* * Deny any non-PAE frames received prior to * authorization. For open/shared-key * authentication the port is mark authorized * after authentication completes. For 802.1x * the port is not marked authorized by the * authenticator until the handshake has completed. */ if (eh->ether_type != htons(ETHERTYPE_PAE)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, eh->ether_shost, "data", "unauthorized port: ether type 0x%x len %u", eh->ether_type, m->m_pkthdr.len); vap->iv_stats.is_rx_unauth++; IEEE80211_NODE_STAT(ni, rx_unauth); goto err; } } else { /* * When denying unencrypted frames, discard * any non-PAE frames received without encryption. */ if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && ((has_decrypted == 0) && (m->m_flags & M_WEP) == 0) && (is_hw_decrypted == 0) && eh->ether_type != htons(ETHERTYPE_PAE)) { /* * Drop unencrypted frames. */ vap->iv_stats.is_rx_unencrypted++; IEEE80211_NODE_STAT(ni, rx_unencrypted); goto out; } } /* XXX require HT? */ if (qos & IEEE80211_QOS_AMSDU) { m = ieee80211_decap_amsdu(ni, m); if (m == NULL) return IEEE80211_FC0_TYPE_DATA; } else { #ifdef IEEE80211_SUPPORT_SUPERG m = ieee80211_decap_fastframe(vap, ni, m); if (m == NULL) return IEEE80211_FC0_TYPE_DATA; #endif } if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap != NULL) ieee80211_deliver_data(ni->ni_wdsvap, ni, m); else hostap_deliver_data(vap, ni, m); return IEEE80211_FC0_TYPE_DATA; case IEEE80211_FC0_TYPE_MGT: vap->iv_stats.is_rx_mgmt++; IEEE80211_NODE_STAT(ni, rx_mgmt); if (dir != IEEE80211_FC1_DIR_NODS) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "mgt", "incorrect dir 0x%x", dir); vap->iv_stats.is_rx_wrongdir++; goto err; } if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, "mgt", "too short: len %u", m->m_pkthdr.len); vap->iv_stats.is_rx_tooshort++; goto out; } if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { /* ensure return frames are unicast */ IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, wh, NULL, "source is multicast: %s", ether_sprintf(wh->i_addr2)); vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ goto out; } #ifdef IEEE80211_DEBUG if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) || ieee80211_msg_dumppkts(vap)) { if_printf(ifp, "received %s from %s rssi %d\n", ieee80211_mgt_subtype_name(subtype), ether_sprintf(wh->i_addr2), rssi); } #endif if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) { /* * Only shared key auth frames with a challenge * should be encrypted, discard all others. */ IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "WEP set but not permitted"); vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ goto out; } if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { /* * Discard encrypted frames when privacy is off. */ IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "WEP set but PRIVACY off"); vap->iv_stats.is_rx_noprivacy++; goto out; } hdrspace = ieee80211_hdrspace(ic, wh); if (ieee80211_crypto_decap(ni, m, hdrspace, &key) == 0) { /* NB: stats+msgs handled in crypto_decap */ goto out; } wh = mtod(m, struct ieee80211_frame *); wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; has_decrypted = 1; } /* * Pass the packet to radiotap before calling iv_recv_mgmt(). * Otherwise iv_recv_mgmt() might pass another packet to * radiotap, resulting in out of order packet captures. */ if (ieee80211_radiotap_active_vap(vap)) ieee80211_radiotap_rx(vap, m); need_tap = 0; vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); goto out; case IEEE80211_FC0_TYPE_CTL: vap->iv_stats.is_rx_ctl++; IEEE80211_NODE_STAT(ni, rx_ctrl); vap->iv_recv_ctl(ni, m, subtype); goto out; default: IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, wh, "bad", "frame type 0x%x", type); /* should not come here */ break; } err: if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); out: if (m != NULL) { if (need_tap && ieee80211_radiotap_active_vap(vap)) ieee80211_radiotap_rx(vap, m); m_freem(m); } return type; } static void hostap_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh, int rssi, int nf, uint16_t seq, uint16_t status) { struct ieee80211vap *vap = ni->ni_vap; KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state)); if (ni->ni_authmode == IEEE80211_AUTH_SHARED) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, ni->ni_macaddr, "open auth", "bad sta auth mode %u", ni->ni_authmode); vap->iv_stats.is_rx_bad_auth++; /* XXX */ /* * Clear any challenge text that may be there if * a previous shared key auth failed and then an * open auth is attempted. */ if (ni->ni_challenge != NULL) { IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); ni->ni_challenge = NULL; } /* XXX hack to workaround calling convention */ ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_AUTH, (seq + 1) | (IEEE80211_STATUS_ALG<<16)); return; } if (seq != IEEE80211_AUTH_OPEN_REQUEST) { vap->iv_stats.is_rx_bad_auth++; return; } /* always accept open authentication requests */ if (ni == vap->iv_bss) { ni = ieee80211_dup_bss(vap, wh->i_addr2); if (ni == NULL) return; } else if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0) (void) ieee80211_ref_node(ni); /* * Mark the node as referenced to reflect that it's * reference count has been bumped to insure it remains * after the transaction completes. */ ni->ni_flags |= IEEE80211_NODE_AREF; /* * Mark the node as requiring a valid association id * before outbound traffic is permitted. */ ni->ni_flags |= IEEE80211_NODE_ASSOCID; if (vap->iv_acl != NULL && vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) { /* * When the ACL policy is set to RADIUS we defer the * authorization to a user agent. Dispatch an event, * a subsequent MLME call will decide the fate of the * station. If the user agent is not present then the * node will be reclaimed due to inactivity. */ IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, ni->ni_macaddr, "%s", "station authentication defered (radius acl)"); ieee80211_notify_node_auth(ni); } else { IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni->ni_macaddr, "%s", "station authenticated (open)"); /* * When 802.1x is not in use mark the port * authorized at this point so traffic can flow. */ if (ni->ni_authmode != IEEE80211_AUTH_8021X) ieee80211_node_authorize(ni); } } static void hostap_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh, uint8_t *frm, uint8_t *efrm, int rssi, int nf, uint16_t seq, uint16_t status) { struct ieee80211vap *vap = ni->ni_vap; uint8_t *challenge; int allocbs, estatus; KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state)); /* * NB: this can happen as we allow pre-shared key * authentication to be enabled w/o wep being turned * on so that configuration of these can be done * in any order. It may be better to enforce the * ordering in which case this check would just be * for sanity/consistency. */ if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, ni->ni_macaddr, "shared key auth", "%s", " PRIVACY is disabled"); estatus = IEEE80211_STATUS_ALG; goto bad; } /* * Pre-shared key authentication is evil; accept * it only if explicitly configured (it is supported * mainly for compatibility with clients like Mac OS X). */ if (ni->ni_authmode != IEEE80211_AUTH_AUTO && ni->ni_authmode != IEEE80211_AUTH_SHARED) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, ni->ni_macaddr, "shared key auth", "bad sta auth mode %u", ni->ni_authmode); vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */ estatus = IEEE80211_STATUS_ALG; goto bad; } challenge = NULL; if (frm + 1 < efrm) { if ((frm[1] + 2) > (efrm - frm)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, ni->ni_macaddr, "shared key auth", "ie %d/%d too long", frm[0], (frm[1] + 2) - (efrm - frm)); vap->iv_stats.is_rx_bad_auth++; estatus = IEEE80211_STATUS_CHALLENGE; goto bad; } if (*frm == IEEE80211_ELEMID_CHALLENGE) challenge = frm; frm += frm[1] + 2; } switch (seq) { case IEEE80211_AUTH_SHARED_CHALLENGE: case IEEE80211_AUTH_SHARED_RESPONSE: if (challenge == NULL) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, ni->ni_macaddr, "shared key auth", "%s", "no challenge"); vap->iv_stats.is_rx_bad_auth++; estatus = IEEE80211_STATUS_CHALLENGE; goto bad; } if (challenge[1] != IEEE80211_CHALLENGE_LEN) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, ni->ni_macaddr, "shared key auth", "bad challenge len %d", challenge[1]); vap->iv_stats.is_rx_bad_auth++; estatus = IEEE80211_STATUS_CHALLENGE; goto bad; } default: break; } switch (seq) { case IEEE80211_AUTH_SHARED_REQUEST: if (ni == vap->iv_bss) { ni = ieee80211_dup_bss(vap, wh->i_addr2); if (ni == NULL) { /* NB: no way to return an error */ return; } allocbs = 1; } else { if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0) (void) ieee80211_ref_node(ni); allocbs = 0; } /* * Mark the node as referenced to reflect that it's * reference count has been bumped to insure it remains * after the transaction completes. */ ni->ni_flags |= IEEE80211_NODE_AREF; /* * Mark the node as requiring a valid association id * before outbound traffic is permitted. */ ni->ni_flags |= IEEE80211_NODE_ASSOCID; IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); ni->ni_noise = nf; if (!ieee80211_alloc_challenge(ni)) { /* NB: don't return error so they rexmit */ return; } - get_random_bytes(ni->ni_challenge, + net80211_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, uint8_t *cipher) { #define WPA_SEL(x) (((x)<<24)|WPA_OUI) uint32_t w = le32dec(sel); switch (w) { case WPA_SEL(WPA_CSE_NULL): *cipher = IEEE80211_CIPHER_NONE; break; case WPA_SEL(WPA_CSE_WEP40): if (keylen) *keylen = 40 / NBBY; *cipher = IEEE80211_CIPHER_WEP; break; case WPA_SEL(WPA_CSE_WEP104): if (keylen) *keylen = 104 / NBBY; *cipher = IEEE80211_CIPHER_WEP; break; case WPA_SEL(WPA_CSE_TKIP): *cipher = IEEE80211_CIPHER_TKIP; break; case WPA_SEL(WPA_CSE_CCMP): *cipher = IEEE80211_CIPHER_AES_CCM; break; default: return (EINVAL); } return (0); #undef WPA_SEL } /* * Convert a WPA key management/authentication algorithm * to an internal code. */ static int wpa_keymgmt(const uint8_t *sel) { #define WPA_SEL(x) (((x)<<24)|WPA_OUI) uint32_t w = le32dec(sel); switch (w) { case WPA_SEL(WPA_ASE_8021X_UNSPEC): return WPA_ASE_8021X_UNSPEC; case WPA_SEL(WPA_ASE_8021X_PSK): return WPA_ASE_8021X_PSK; case WPA_SEL(WPA_ASE_NONE): return WPA_ASE_NONE; } return 0; /* NB: so is discarded */ #undef WPA_SEL } /* * Parse a WPA information element to collect parameters. * Note that we do not validate security parameters; that * is handled by the authenticator; the parsing done here * is just for internal use in making operational decisions. */ static int ieee80211_parse_wpa(struct ieee80211vap *vap, const uint8_t *frm, struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh) { uint8_t len = frm[1]; uint32_t w; int error, n; /* * Check the length once for fixed parts: OUI, type, * version, mcast cipher, and 2 selector counts. * Other, variable-length data, must be checked separately. */ if ((vap->iv_flags & IEEE80211_F_WPA1) == 0) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, wh, "WPA", "not WPA, flags 0x%x", vap->iv_flags); return IEEE80211_REASON_IE_INVALID; } if (len < 14) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, wh, "WPA", "too short, len %u", len); return IEEE80211_REASON_IE_INVALID; } frm += 6, len -= 4; /* NB: len is payload only */ /* NB: iswpaoui already validated the OUI and type */ w = le16dec(frm); if (w != WPA_VERSION) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, wh, "WPA", "bad version %u", w); return IEEE80211_REASON_IE_INVALID; } frm += 2, len -= 2; memset(rsn, 0, sizeof(*rsn)); /* multicast/group cipher */ error = wpa_cipher(frm, &rsn->rsn_mcastkeylen, &rsn->rsn_mcastcipher); if (error != 0) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, wh, "WPA", "unknown mcast cipher suite %08X", le32dec(frm)); return IEEE80211_REASON_GROUP_CIPHER_INVALID; } frm += 4, len -= 4; /* unicast ciphers */ n = le16dec(frm); frm += 2, len -= 2; if (len < n*4+2) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, wh, "WPA", "ucast cipher data too short; len %u, n %u", len, n); return IEEE80211_REASON_IE_INVALID; } w = 0; for (; n > 0; n--) { uint8_t cipher; error = wpa_cipher(frm, &rsn->rsn_ucastkeylen, &cipher); if (error == 0) w |= 1 << cipher; frm += 4, len -= 4; } if (w == 0) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, wh, "WPA", "no usable pairwise cipher suite found (w=%d)", w); return IEEE80211_REASON_PAIRWISE_CIPHER_INVALID; } /* XXX other? */ if (w & (1 << IEEE80211_CIPHER_AES_CCM)) rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM; else rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP; /* key management algorithms */ n = le16dec(frm); frm += 2, len -= 2; if (len < n*4) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, wh, "WPA", "key mgmt alg data too short; len %u, n %u", len, n); return IEEE80211_REASON_IE_INVALID; } w = 0; for (; n > 0; n--) { w |= wpa_keymgmt(frm); frm += 4, len -= 4; } if (w & WPA_ASE_8021X_UNSPEC) rsn->rsn_keymgmt = WPA_ASE_8021X_UNSPEC; else rsn->rsn_keymgmt = WPA_ASE_8021X_PSK; if (len > 2) /* optional capabilities */ rsn->rsn_caps = le16dec(frm); return 0; } /* * Convert an RSN cipher selector OUI to an internal * cipher algorithm. Where appropriate we also * record any key length. */ static int rsn_cipher(const uint8_t *sel, uint8_t *keylen, uint8_t *cipher) { #define RSN_SEL(x) (((x)<<24)|RSN_OUI) uint32_t w = le32dec(sel); switch (w) { case RSN_SEL(RSN_CSE_NULL): *cipher = IEEE80211_CIPHER_NONE; break; case RSN_SEL(RSN_CSE_WEP40): if (keylen) *keylen = 40 / NBBY; *cipher = IEEE80211_CIPHER_WEP; break; case RSN_SEL(RSN_CSE_WEP104): if (keylen) *keylen = 104 / NBBY; *cipher = IEEE80211_CIPHER_WEP; break; case RSN_SEL(RSN_CSE_TKIP): *cipher = IEEE80211_CIPHER_TKIP; break; case RSN_SEL(RSN_CSE_CCMP): *cipher = IEEE80211_CIPHER_AES_CCM; break; case RSN_SEL(RSN_CSE_WRAP): *cipher = IEEE80211_CIPHER_AES_OCB; break; default: return (EINVAL); } return (0); #undef WPA_SEL } /* * Convert an RSN key management/authentication algorithm * to an internal code. */ static int rsn_keymgmt(const uint8_t *sel) { #define RSN_SEL(x) (((x)<<24)|RSN_OUI) uint32_t w = le32dec(sel); switch (w) { case RSN_SEL(RSN_ASE_8021X_UNSPEC): return RSN_ASE_8021X_UNSPEC; case RSN_SEL(RSN_ASE_8021X_PSK): return RSN_ASE_8021X_PSK; case RSN_SEL(RSN_ASE_NONE): return RSN_ASE_NONE; } return 0; /* NB: so is discarded */ #undef RSN_SEL } /* * Parse a WPA/RSN information element to collect parameters * and validate the parameters against what has been * configured for the system. */ static int ieee80211_parse_rsn(struct ieee80211vap *vap, const uint8_t *frm, struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh) { uint8_t len = frm[1]; uint32_t w; int error, 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; } /* XXX may be shorter */ if (len < 10) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, wh, "RSN", "too short, len %u", len); return IEEE80211_REASON_IE_INVALID; } frm += 2; w = le16dec(frm); if (w != RSN_VERSION) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, wh, "RSN", "bad version %u", w); return IEEE80211_REASON_UNSUPP_RSN_IE_VERSION; } frm += 2, len -= 2; memset(rsn, 0, sizeof(*rsn)); /* multicast/group cipher */ error = rsn_cipher(frm, &rsn->rsn_mcastkeylen, &rsn->rsn_mcastcipher); if (error != 0) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, wh, "RSN", "unknown mcast cipher suite %08X", le32dec(frm)); return IEEE80211_REASON_GROUP_CIPHER_INVALID; } if (rsn->rsn_mcastcipher == IEEE80211_CIPHER_NONE) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, wh, "RSN", "invalid mcast cipher suite %d", rsn->rsn_mcastcipher); return IEEE80211_REASON_GROUP_CIPHER_INVALID; } frm += 4, len -= 4; /* unicast ciphers */ n = le16dec(frm); frm += 2, len -= 2; if (len < n*4+2) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, wh, "RSN", "ucast cipher data too short; len %u, n %u", len, n); return IEEE80211_REASON_IE_INVALID; } w = 0; for (; n > 0; n--) { uint8_t cipher; error = rsn_cipher(frm, &rsn->rsn_ucastkeylen, &cipher); if (error == 0) w |= 1 << cipher; frm += 4, len -= 4; } if (w & (1 << IEEE80211_CIPHER_AES_CCM)) rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM; else if (w & (1 << IEEE80211_CIPHER_AES_OCB)) rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_OCB; else if (w & (1 << IEEE80211_CIPHER_TKIP)) rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP; else if ((w & (1 << IEEE80211_CIPHER_NONE)) && (rsn->rsn_mcastcipher == IEEE80211_CIPHER_WEP || rsn->rsn_mcastcipher == IEEE80211_CIPHER_TKIP)) rsn->rsn_ucastcipher = IEEE80211_CIPHER_NONE; else { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, wh, "RSN", "no usable pairwise cipher suite found (w=%d)", w); return IEEE80211_REASON_PAIRWISE_CIPHER_INVALID; } /* key management algorithms */ n = le16dec(frm); frm += 2, len -= 2; if (len < n*4) { IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, wh, "RSN", "key mgmt alg data too short; len %u, n %u", len, n); return IEEE80211_REASON_IE_INVALID; } w = 0; for (; n > 0; n--) { w |= rsn_keymgmt(frm); frm += 4, len -= 4; } if (w & RSN_ASE_8021X_UNSPEC) rsn->rsn_keymgmt = RSN_ASE_8021X_UNSPEC; else rsn->rsn_keymgmt = RSN_ASE_8021X_PSK; /* optional RSN capabilities */ if (len > 2) rsn->rsn_caps = le16dec(frm); /* XXXPMKID */ return 0; } /* * WPA/802.11i association 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 wpa->rsn fallback? */ /* XXX distinguish WPA/RSN? */ vap->iv_stats.is_rx_assoc_badwpaie++; goto bad; } IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, ni, "%s ie: mc %u/%u uc %u/%u key %u caps 0x%x", wpa != NULL ? "WPA" : "RSN", rsnparms->rsn_mcastcipher, rsnparms->rsn_mcastkeylen, rsnparms->rsn_ucastcipher, rsnparms->rsn_ucastkeylen, rsnparms->rsn_keymgmt, rsnparms->rsn_caps); return 1; bad: ieee80211_node_deauth(ni, reason); return 0; } /* XXX find a better place for definition */ struct l2_update_frame { struct ether_header eh; uint8_t dsap; uint8_t ssap; uint8_t control; uint8_t xid[3]; } __packed; /* * Deliver a TGf L2UF frame on behalf of a station. * This primes any bridge when the station is roaming * between ap's on the same wired network. */ static void ieee80211_deliver_l2uf(struct ieee80211_node *ni) { struct ieee80211vap *vap = ni->ni_vap; struct ifnet *ifp = vap->iv_ifp; struct mbuf *m; struct l2_update_frame *l2uf; struct ether_header *eh; m = m_gethdr(M_NOWAIT, MT_DATA); if (m == NULL) { IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, "%s", "no mbuf for l2uf frame"); vap->iv_stats.is_rx_nobuf++; /* XXX not right */ return; } l2uf = mtod(m, struct l2_update_frame *); eh = &l2uf->eh; /* dst: Broadcast address */ IEEE80211_ADDR_COPY(eh->ether_dhost, ifp->if_broadcastaddr); /* src: associated STA */ IEEE80211_ADDR_COPY(eh->ether_shost, ni->ni_macaddr); eh->ether_type = htons(sizeof(*l2uf) - sizeof(*eh)); l2uf->dsap = 0; l2uf->ssap = 0; l2uf->control = 0xf5; l2uf->xid[0] = 0x81; l2uf->xid[1] = 0x80; l2uf->xid[2] = 0x00; m->m_pkthdr.len = m->m_len = sizeof(*l2uf); hostap_deliver_data(vap, ni, m); } static void ratesetmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, int reassoc, int resp, const char *tag, int rate) { IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2, "deny %s request, %s rate set mismatch, rate/MCS %d", reassoc ? "reassoc" : "assoc", tag, rate & IEEE80211_RATE_VAL); IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_BASIC_RATE); ieee80211_node_leave(ni); } static void capinfomismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, int reassoc, int resp, const char *tag, int capinfo) { struct ieee80211vap *vap = ni->ni_vap; IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2, "deny %s request, %s mismatch 0x%x", reassoc ? "reassoc" : "assoc", tag, capinfo); IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_CAPINFO); ieee80211_node_leave(ni); vap->iv_stats.is_rx_assoc_capmismatch++; } static void htcapmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, int reassoc, int resp) { IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2, "deny %s request, %s missing HT ie", reassoc ? "reassoc" : "assoc"); /* XXX no better code */ IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_MISSING_HT_CAPS); ieee80211_node_leave(ni); } static void authalgreject(struct ieee80211_node *ni, const struct ieee80211_frame *wh, int algo, int seq, int status) { struct ieee80211vap *vap = ni->ni_vap; IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, wh, NULL, "unsupported alg %d", algo); vap->iv_stats.is_rx_auth_unsupported++; ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_AUTH, seq | (status << 16)); } static __inline int ishtmixed(const uint8_t *ie) { const struct ieee80211_ie_htinfo *ht = (const struct ieee80211_ie_htinfo *) ie; return (ht->hi_byte2 & IEEE80211_HTINFO_OPMODE) == IEEE80211_HTINFO_OPMODE_MIXED; } static int is11bclient(const uint8_t *rates, const uint8_t *xrates) { static const uint32_t brates = (1<<2*1)|(1<<2*2)|(1<<11)|(1<<2*11); int i; /* NB: the 11b clients we care about will not have xrates */ if (xrates != NULL || rates == NULL) return 0; for (i = 0; i < rates[1]; i++) { int r = rates[2+i] & IEEE80211_RATE_VAL; if (r > 2*11 || ((1<ni_vap; struct ieee80211com *ic = ni->ni_ic; struct ieee80211_frame *wh; uint8_t *frm, *efrm, *sfrm; uint8_t *ssid, *rates, *xrates, *wpa, *rsn, *wme, *ath, *htcap; uint8_t *vhtcap, *vhtinfo; int reassoc, resp; uint8_t rate; wh = mtod(m0, struct ieee80211_frame *); frm = (uint8_t *)&wh[1]; efrm = mtod(m0, uint8_t *) + m0->m_len; switch (subtype) { case IEEE80211_FC0_SUBTYPE_PROBE_RESP: /* * We process beacon/probe response frames when scanning; * otherwise we check beacon frames for overlapping non-ERP * BSS in 11g and/or overlapping legacy BSS when in HT. */ if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { vap->iv_stats.is_rx_mgtdiscard++; return; } /* FALLTHROUGH */ case IEEE80211_FC0_SUBTYPE_BEACON: { struct ieee80211_scanparams scan; /* NB: accept off-channel frames */ /* XXX TODO: use rxstatus to determine off-channel details */ if (ieee80211_parse_beacon(ni, m0, ic->ic_curchan, &scan) &~ IEEE80211_BPARSE_OFFCHAN) return; /* * Count frame now that we know it's to be processed. */ if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { vap->iv_stats.is_rx_beacon++; /* XXX remove */ IEEE80211_NODE_STAT(ni, rx_beacons); } else IEEE80211_NODE_STAT(ni, rx_proberesp); /* * If scanning, just pass information to the scan module. */ if (ic->ic_flags & IEEE80211_F_SCAN) { if (scan.status == 0 && /* NB: on channel */ (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN)) { /* * Actively scanning a channel marked passive; * send a probe request now that we know there * is 802.11 traffic present. * * XXX check if the beacon we recv'd gives * us what we need and suppress the probe req */ ieee80211_probe_curchan(vap, 1); ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; } ieee80211_add_scan(vap, ic->ic_curchan, &scan, wh, subtype, rssi, nf); return; } /* * Check beacon for overlapping bss w/ non ERP stations. * If we detect one and protection is configured but not * enabled, enable it and start a timer that'll bring us * out if we stop seeing the bss. */ if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && scan.status == 0 && /* NB: on-channel */ ((scan.erp & 0x100) == 0 || /* NB: no ERP, 11b sta*/ (scan.erp & IEEE80211_ERP_NON_ERP_PRESENT))) { vap->iv_lastnonerp = ticks; vap->iv_flags_ext |= IEEE80211_FEXT_NONERP_PR; /* * XXX TODO: this may need to check all VAPs? */ if (vap->iv_protmode != IEEE80211_PROT_NONE && (vap->iv_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); vap->iv_flags |= IEEE80211_F_USEPROT; ieee80211_vap_update_erp_protmode(vap); } } /* * 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(vap, IEEE80211_HTINFO_OPMODE_PROTOPT | IEEE80211_HTINFO_NONHT_PRESENT); } else if (ishtmixed(scan.htinfo)) { /* XXX? take NONHT_PRESENT from beacon? */ ieee80211_htprot_update(vap, IEEE80211_HTINFO_OPMODE_MIXED | IEEE80211_HTINFO_NONHT_PRESENT); } } break; } case IEEE80211_FC0_SUBTYPE_PROBE_REQ: if (vap->iv_state != IEEE80211_S_RUN) { vap->iv_stats.is_rx_mgtdiscard++; return; } /* * Consult the ACL policy module if setup. */ if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, wh, NULL, "%s", "disallowed by ACL"); vap->iv_stats.is_rx_acl++; return; } /* * prreq frame format * [tlv] ssid * [tlv] supported rates * [tlv] extended supported rates */ ssid = rates = xrates = NULL; while (efrm - frm > 1) { IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); switch (*frm) { case IEEE80211_ELEMID_SSID: ssid = frm; break; case IEEE80211_ELEMID_RATES: rates = frm; break; case IEEE80211_ELEMID_XRATES: xrates = frm; break; } frm += frm[1] + 2; } IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); if (xrates != NULL) IEEE80211_VERIFY_ELEMENT(xrates, IEEE80211_RATE_MAXSIZE - rates[1], return); IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return); if ((vap->iv_flags & IEEE80211_F_HIDESSID) && ssid[1] == 0) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "no ssid with ssid suppression enabled"); vap->iv_stats.is_rx_ssidmismatch++; /*XXX*/ return; } /* XXX find a better class or define it's own */ IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, "%s", "recv probe req"); /* * Some legacy 11b clients cannot hack a complete * probe response frame. When the request includes * only a bare-bones rate set, communicate this to * the transmit side. */ ieee80211_send_proberesp(vap, wh->i_addr2, is11bclient(rates, xrates) ? IEEE80211_SEND_LEGACY_11B : 0); break; case IEEE80211_FC0_SUBTYPE_AUTH: { uint16_t algo, seq, status; if (vap->iv_state != IEEE80211_S_RUN) { vap->iv_stats.is_rx_mgtdiscard++; return; } if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) { IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, wh, NULL, "%s", "wrong bssid"); vap->iv_stats.is_rx_wrongbss++; /*XXX unique stat?*/ return; } /* * auth frame format * [2] algorithm * [2] sequence * [2] status * [tlv*] challenge */ IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); algo = le16toh(*(uint16_t *)frm); seq = le16toh(*(uint16_t *)(frm + 2)); status = le16toh(*(uint16_t *)(frm + 4)); IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2, "recv auth frame with algorithm %d seq %d", algo, seq); /* * Consult the ACL policy module if setup. */ if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, wh, NULL, "%s", "disallowed by ACL"); vap->iv_stats.is_rx_acl++; ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_AUTH, (seq+1) | (IEEE80211_STATUS_UNSPECIFIED<<16)); return; } if (vap->iv_flags & IEEE80211_F_COUNTERM) { IEEE80211_DISCARD(vap, IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO, wh, NULL, "%s", "TKIP countermeasures enabled"); vap->iv_stats.is_rx_auth_countermeasures++; ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_AUTH, IEEE80211_REASON_MIC_FAILURE); return; } if (algo == IEEE80211_AUTH_ALG_SHARED) hostap_auth_shared(ni, wh, frm + 6, efrm, rssi, nf, seq, status); else if (algo == IEEE80211_AUTH_ALG_OPEN) hostap_auth_open(ni, wh, rssi, nf, seq, status); else if (algo == IEEE80211_AUTH_ALG_LEAP) { authalgreject(ni, wh, algo, seq+1, IEEE80211_STATUS_ALG); return; } else { /* * We assume that an unknown algorithm is the result * of a decryption failure on a shared key auth frame; * return a status code appropriate for that instead * of IEEE80211_STATUS_ALG. * * NB: a seq# of 4 is intentional; the decrypted * frame likely has a bogus seq value. */ authalgreject(ni, wh, algo, 4, IEEE80211_STATUS_CHALLENGE); return; } break; } case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: { uint16_t capinfo, lintval; struct ieee80211_rsnparms rsnparms; if (vap->iv_state != IEEE80211_S_RUN) { vap->iv_stats.is_rx_mgtdiscard++; return; } if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) { IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, wh, NULL, "%s", "wrong bssid"); vap->iv_stats.is_rx_assoc_bss++; return; } if (subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) { reassoc = 1; resp = IEEE80211_FC0_SUBTYPE_REASSOC_RESP; } else { reassoc = 0; resp = IEEE80211_FC0_SUBTYPE_ASSOC_RESP; } if (ni == vap->iv_bss) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2, "deny %s request, sta not authenticated", reassoc ? "reassoc" : "assoc"); ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_DEAUTH, IEEE80211_REASON_ASSOC_NOT_AUTHED); vap->iv_stats.is_rx_assoc_notauth++; return; } /* * asreq frame format * [2] capability information * [2] listen interval * [6*] current AP address (reassoc only) * [tlv] ssid * [tlv] supported rates * [tlv] extended supported rates * [tlv] WPA or RSN * [tlv] HT capabilities * [tlv] Atheros capabilities */ IEEE80211_VERIFY_LENGTH(efrm - frm, (reassoc ? 10 : 4), return); capinfo = le16toh(*(uint16_t *)frm); frm += 2; lintval = le16toh(*(uint16_t *)frm); frm += 2; if (reassoc) frm += 6; /* ignore current AP info */ ssid = rates = xrates = wpa = rsn = wme = ath = htcap = NULL; vhtcap = vhtinfo = 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_VHT_CAP: vhtcap = frm; break; case IEEE80211_ELEMID_VHT_OPMODE: vhtinfo = frm; break; case IEEE80211_ELEMID_VENDOR: if (iswpaoui(frm)) wpa = frm; else if (iswmeinfo(frm)) wme = frm; #ifdef IEEE80211_SUPPORT_SUPERG else if (isatherosoui(frm)) ath = frm; #endif else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) { if (ishtcapoui(frm) && htcap == NULL) htcap = frm; } break; } frm += frm[1] + 2; } IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); if (xrates != NULL) IEEE80211_VERIFY_ELEMENT(xrates, IEEE80211_RATE_MAXSIZE - rates[1], return); IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return); if (htcap != NULL) { IEEE80211_VERIFY_LENGTH(htcap[1], htcap[0] == IEEE80211_ELEMID_VENDOR ? 4 + sizeof(struct ieee80211_ie_htcap)-2 : sizeof(struct ieee80211_ie_htcap)-2, return); /* XXX just NULL out? */ } /* Validate VHT IEs */ if (vhtcap != NULL) { IEEE80211_VERIFY_LENGTH(vhtcap[1], sizeof(struct ieee80211_ie_vhtcap) - 2, return); } if (vhtinfo != NULL) { IEEE80211_VERIFY_LENGTH(vhtinfo[1], sizeof(struct ieee80211_ie_vht_operation) - 2, return); } if ((vap->iv_flags & IEEE80211_F_WPA) && !wpa_assocreq(ni, &rsnparms, wh, wpa, rsn, capinfo)) return; /* discard challenge after association */ if (ni->ni_challenge != NULL) { IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); ni->ni_challenge = NULL; } /* NB: 802.11 spec says to ignore station's privacy bit */ if ((capinfo & IEEE80211_CAPINFO_ESS) == 0) { capinfomismatch(ni, wh, reassoc, resp, "capability", capinfo); return; } /* * Disallow re-associate w/ invalid slot time setting. */ if (ni->ni_associd != 0 && IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && ((ni->ni_capinfo ^ capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME)) { capinfomismatch(ni, wh, reassoc, resp, "slot time", capinfo); return; } rate = ieee80211_setup_rates(ni, rates, xrates, IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | IEEE80211_F_DONEGO | IEEE80211_F_DODEL); if (rate & IEEE80211_RATE_BASIC) { ratesetmismatch(ni, wh, reassoc, resp, "legacy", rate); vap->iv_stats.is_rx_assoc_norate++; return; } /* * If constrained to 11g-only stations reject an * 11b-only station. We cheat a bit here by looking * at the max negotiated xmit rate and assuming anyone * with a best rate <24Mb/s is an 11b station. */ if ((vap->iv_flags & IEEE80211_F_PUREG) && rate < 48) { ratesetmismatch(ni, wh, reassoc, resp, "11g", rate); vap->iv_stats.is_rx_assoc_norate++; return; } /* * Do HT rate set handling and setup HT node state. */ ni->ni_chan = vap->iv_bss->ni_chan; /* VHT */ if (IEEE80211_IS_CHAN_VHT(ni->ni_chan) && vhtcap != NULL && vhtinfo != NULL) { /* XXX TODO; see below */ printf("%s: VHT TODO!\n", __func__); ieee80211_vht_node_init(ni); ieee80211_vht_update_cap(ni, vhtcap, vhtinfo); } else if (ni->ni_flags & IEEE80211_NODE_VHT) ieee80211_vht_node_cleanup(ni); /* HT */ if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && htcap != NULL) { rate = ieee80211_setup_htrates(ni, htcap, IEEE80211_F_DOFMCS | IEEE80211_F_DONEGO | IEEE80211_F_DOBRS); if (rate & IEEE80211_RATE_BASIC) { ratesetmismatch(ni, wh, reassoc, resp, "HT", rate); vap->iv_stats.is_ht_assoc_norate++; return; } ieee80211_ht_node_init(ni); ieee80211_ht_updatehtcap(ni, htcap); } else if (ni->ni_flags & IEEE80211_NODE_HT) ieee80211_ht_node_cleanup(ni); /* Finally - this will use HT/VHT info to change node channel */ if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && htcap != NULL) { ieee80211_ht_updatehtcap_final(ni); } #ifdef IEEE80211_SUPPORT_SUPERG /* Always do ff node cleanup; for A-MSDU */ ieee80211_ff_node_cleanup(ni); #endif /* * Allow AMPDU operation only with unencrypted traffic * or AES-CCM; the 11n spec only specifies these ciphers * so permitting any others is undefined and can lead * to interoperability problems. */ if ((ni->ni_flags & IEEE80211_NODE_HT) && (((vap->iv_flags & IEEE80211_F_WPA) && rsnparms.rsn_ucastcipher != IEEE80211_CIPHER_AES_CCM) || (vap->iv_flags & (IEEE80211_F_WPA|IEEE80211_F_PRIVACY)) == IEEE80211_F_PRIVACY)) { IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, "disallow HT use because WEP or TKIP requested, " "capinfo 0x%x ucastcipher %d", capinfo, rsnparms.rsn_ucastcipher); ieee80211_ht_node_cleanup(ni); #ifdef IEEE80211_SUPPORT_SUPERG /* Always do ff node cleanup; for A-MSDU */ ieee80211_ff_node_cleanup(ni); #endif vap->iv_stats.is_ht_assoc_downgrade++; } /* * If constrained to 11n-only stations reject legacy stations. */ if ((vap->iv_flags_ht & IEEE80211_FHT_PUREN) && (ni->ni_flags & IEEE80211_NODE_HT) == 0) { htcapmismatch(ni, wh, reassoc, resp); vap->iv_stats.is_ht_assoc_nohtcap++; return; } IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); ni->ni_noise = nf; ni->ni_intval = lintval; ni->ni_capinfo = capinfo; ni->ni_fhdwell = vap->iv_bss->ni_fhdwell; ni->ni_fhindex = vap->iv_bss->ni_fhindex; /* * Store the IEs. * XXX maybe better to just expand */ if (ieee80211_ies_init(&ni->ni_ies, sfrm, efrm - sfrm)) { #define setie(_ie, _off) ieee80211_ies_setie(ni->ni_ies, _ie, _off) if (wpa != NULL) setie(wpa_ie, wpa - sfrm); if (rsn != NULL) setie(rsn_ie, rsn - sfrm); if (htcap != NULL) setie(htcap_ie, htcap - sfrm); if (wme != NULL) { setie(wme_ie, wme - sfrm); /* * Mark node as capable of QoS. */ ni->ni_flags |= IEEE80211_NODE_QOS; if (ieee80211_parse_wmeie(wme, wh, ni) > 0) { if (ni->ni_uapsd != 0) ni->ni_flags |= IEEE80211_NODE_UAPSD; else ni->ni_flags &= ~IEEE80211_NODE_UAPSD; } } else ni->ni_flags &= ~(IEEE80211_NODE_QOS | IEEE80211_NODE_UAPSD); #ifdef IEEE80211_SUPPORT_SUPERG if (ath != NULL) { setie(ath_ie, ath - sfrm); /* * Parse ATH station parameters. */ ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); } else #endif ni->ni_ath_flags = 0; #undef setie } else { ni->ni_flags &= ~IEEE80211_NODE_QOS; ni->ni_flags &= ~IEEE80211_NODE_UAPSD; ni->ni_ath_flags = 0; } ieee80211_node_join(ni, resp); ieee80211_deliver_l2uf(ni); break; } case IEEE80211_FC0_SUBTYPE_DEAUTH: case IEEE80211_FC0_SUBTYPE_DISASSOC: { uint16_t reason; if (vap->iv_state != IEEE80211_S_RUN || /* NB: can happen when in promiscuous mode */ !IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { vap->iv_stats.is_rx_mgtdiscard++; break; } /* * deauth/disassoc frame format * [2] reason */ IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); reason = le16toh(*(uint16_t *)frm); if (subtype == IEEE80211_FC0_SUBTYPE_DEAUTH) { vap->iv_stats.is_rx_deauth++; IEEE80211_NODE_STAT(ni, rx_deauth); } else { vap->iv_stats.is_rx_disassoc++; IEEE80211_NODE_STAT(ni, rx_disassoc); } IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, "recv %s (reason: %d (%s))", ieee80211_mgt_subtype_name(subtype), reason, ieee80211_reason_to_string(reason)); if (ni != vap->iv_bss) ieee80211_node_leave(ni); break; } case IEEE80211_FC0_SUBTYPE_ACTION: case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: if (ni == vap->iv_bss) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "unknown node"); vap->iv_stats.is_rx_mgtdiscard++; } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && !IEEE80211_IS_MULTICAST(wh->i_addr1)) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "not for us"); vap->iv_stats.is_rx_mgtdiscard++; } else if (vap->iv_state != IEEE80211_S_RUN) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "wrong state %s", ieee80211_state_name[vap->iv_state]); vap->iv_stats.is_rx_mgtdiscard++; } else { if (ieee80211_parse_action(ni, m0) == 0) (void)ic->ic_recv_action(ni, wh, frm, efrm); } break; case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: case IEEE80211_FC0_SUBTYPE_TIMING_ADV: case IEEE80211_FC0_SUBTYPE_ATIM: IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "not handled"); vap->iv_stats.is_rx_mgtdiscard++; break; default: IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, wh, "mgt", "subtype 0x%x not handled", subtype); vap->iv_stats.is_rx_badsubtype++; break; } } static void hostap_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) { switch (subtype) { case IEEE80211_FC0_SUBTYPE_PS_POLL: ni->ni_vap->iv_recv_pspoll(ni, m); break; case IEEE80211_FC0_SUBTYPE_BAR: ieee80211_recv_bar(ni, m); break; } } /* * Process a received ps-poll frame. */ void ieee80211_recv_pspoll(struct ieee80211_node *ni, struct mbuf *m0) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = vap->iv_ic; struct ieee80211_frame_min *wh; struct mbuf *m; uint16_t aid; int qlen; wh = mtod(m0, struct ieee80211_frame_min *); if (ni->ni_associd == 0) { IEEE80211_DISCARD(vap, IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG, (struct ieee80211_frame *) wh, NULL, "%s", "unassociated station"); vap->iv_stats.is_ps_unassoc++; IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, IEEE80211_REASON_NOT_ASSOCED); return; } aid = le16toh(*(uint16_t *)wh->i_dur); if (aid != ni->ni_associd) { IEEE80211_DISCARD(vap, IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG, (struct ieee80211_frame *) wh, NULL, "aid mismatch: sta aid 0x%x poll aid 0x%x", ni->ni_associd, aid); vap->iv_stats.is_ps_badaid++; /* * NB: We used to deauth the station but it turns out * the Blackberry Curve 8230 (and perhaps other devices) * sometimes send the wrong AID when WME is negotiated. * Being more lenient here seems ok as we already check * the station is associated and we only return frames * queued for the station (i.e. we don't use the AID). */ return; } /* Okay, take the first queued packet and put it out... */ m = ieee80211_node_psq_dequeue(ni, &qlen); if (m == NULL) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_POWER, wh->i_addr2, "%s", "recv ps-poll, but queue empty"); ieee80211_send_nulldata(ieee80211_ref_node(ni)); vap->iv_stats.is_ps_qempty++; /* XXX node stat */ if (vap->iv_set_tim != NULL) vap->iv_set_tim(ni, 0); /* just in case */ return; } /* * If there are more packets, set the more packets bit * in the packet dispatched to the station; otherwise * turn off the TIM bit. */ if (qlen != 0) { IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, "recv ps-poll, send packet, %u still queued", qlen); m->m_flags |= M_MORE_DATA; } else { IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, "%s", "recv ps-poll, send packet, queue empty"); if (vap->iv_set_tim != NULL) vap->iv_set_tim(ni, 0); } m->m_flags |= M_PWR_SAV; /* bypass PS handling */ /* * Do the right thing; if it's an encap'ed frame then * call ieee80211_parent_xmitpkt() else * call ieee80211_vap_xmitpkt(). */ if (m->m_flags & M_ENCAP) { (void) ieee80211_parent_xmitpkt(ic, m); } else { (void) ieee80211_vap_xmitpkt(vap, m); } } diff --git a/sys/net80211/ieee80211_mesh.c b/sys/net80211/ieee80211_mesh.c index fdb84a2acb3d..48a3590d0cf3 100644 --- a/sys/net80211/ieee80211_mesh.c +++ b/sys/net80211/ieee80211_mesh.c @@ -1,3617 +1,3617 @@ /*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2009 The FreeBSD Foundation * All rights reserved. * * This software was developed by Rui Paulo under sponsorship from the * FreeBSD Foundation. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #ifdef __FreeBSD__ __FBSDID("$FreeBSD$"); #endif /* * IEEE 802.11s Mesh Point (MBSS) support. * * Based on March 2009, D3.0 802.11s draft spec. */ #include "opt_inet.h" #include "opt_wlan.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef IEEE80211_SUPPORT_SUPERG #include #endif #include #include static void mesh_rt_flush_invalid(struct ieee80211vap *); static int mesh_select_proto_path(struct ieee80211vap *, const char *); static int mesh_select_proto_metric(struct ieee80211vap *, const char *); static void mesh_vattach(struct ieee80211vap *); static int mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int); static void mesh_rt_cleanup_cb(void *); static void mesh_gatemode_setup(struct ieee80211vap *); static void mesh_gatemode_cb(void *); static void mesh_linkchange(struct ieee80211_node *, enum ieee80211_mesh_mlstate); static void mesh_checkid(void *, struct ieee80211_node *); static uint32_t mesh_generateid(struct ieee80211vap *); static int mesh_checkpseq(struct ieee80211vap *, const uint8_t [IEEE80211_ADDR_LEN], uint32_t); static void mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *, struct ieee80211_mesh_route *); static void mesh_forward(struct ieee80211vap *, struct mbuf *, const struct ieee80211_meshcntl *); static int mesh_input(struct ieee80211_node *, struct mbuf *, const struct ieee80211_rx_stats *rxs, int, int); static void mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int, const struct ieee80211_rx_stats *rxs, int, int); static void mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int); static void mesh_peer_timeout_setup(struct ieee80211_node *); static void mesh_peer_timeout_backoff(struct ieee80211_node *); static void mesh_peer_timeout_cb(void *); static __inline void mesh_peer_timeout_stop(struct ieee80211_node *); static int mesh_verify_meshid(struct ieee80211vap *, const uint8_t *); static int mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *); static int mesh_verify_meshpeer(struct ieee80211vap *, uint8_t, const uint8_t *); uint32_t mesh_airtime_calc(struct ieee80211_node *); /* * Timeout values come from the specification and are in milliseconds. */ static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, "IEEE 802.11s parameters"); static int ieee80211_mesh_gateint = -1; SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I", "mesh gate interval (ms)"); static int ieee80211_mesh_retrytimeout = -1; SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I", "Retry timeout (msec)"); static int ieee80211_mesh_holdingtimeout = -1; SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", "Holding state timeout (msec)"); static int ieee80211_mesh_confirmtimeout = -1; SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", "Confirm state timeout (msec)"); static int ieee80211_mesh_backofftimeout = -1; SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I", "Backoff timeout (msec). This is to throutles peering forever when " "not receiving answer or is rejected by a neighbor"); static int ieee80211_mesh_maxretries = 2; SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLFLAG_RW, &ieee80211_mesh_maxretries, 0, "Maximum retries during peer link establishment"); static int ieee80211_mesh_maxholding = 2; SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLFLAG_RW, &ieee80211_mesh_maxholding, 0, "Maximum times we are allowed to transition to HOLDING state before " "backinoff during peer link establishment"); static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; static ieee80211_recv_action_func mesh_recv_action_meshpeering_open; static ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm; static ieee80211_recv_action_func mesh_recv_action_meshpeering_close; static ieee80211_recv_action_func mesh_recv_action_meshlmetric; static ieee80211_recv_action_func mesh_recv_action_meshgate; static ieee80211_send_action_func mesh_send_action_meshpeering_open; static ieee80211_send_action_func mesh_send_action_meshpeering_confirm; static ieee80211_send_action_func mesh_send_action_meshpeering_close; static ieee80211_send_action_func mesh_send_action_meshlmetric; static ieee80211_send_action_func mesh_send_action_meshgate; static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = { .mpm_descr = "AIRTIME", .mpm_ie = IEEE80211_MESHCONF_METRIC_AIRTIME, .mpm_metric = mesh_airtime_calc, }; static struct ieee80211_mesh_proto_path mesh_proto_paths[4]; static struct ieee80211_mesh_proto_metric mesh_proto_metrics[4]; MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame"); MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame"); MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame"); /* The longer one of the lifetime should be stored as new lifetime */ #define MESH_ROUTE_LIFETIME_MAX(a, b) (a > b ? a : b) MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table"); MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table"); /* * Helper functions to manipulate the Mesh routing table. */ static struct ieee80211_mesh_route * mesh_rt_find_locked(struct ieee80211_mesh_state *ms, const uint8_t dest[IEEE80211_ADDR_LEN]) { struct ieee80211_mesh_route *rt; MESH_RT_LOCK_ASSERT(ms); TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { if (IEEE80211_ADDR_EQ(dest, rt->rt_dest)) return rt; } return NULL; } static struct ieee80211_mesh_route * mesh_rt_add_locked(struct ieee80211vap *vap, const uint8_t dest[IEEE80211_ADDR_LEN]) { struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_mesh_route *rt; KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest), ("%s: adding broadcast to the routing table", __func__)); MESH_RT_LOCK_ASSERT(ms); rt = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_route)) + ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); if (rt != NULL) { rt->rt_vap = vap; IEEE80211_ADDR_COPY(rt->rt_dest, dest); rt->rt_priv = (void *)ALIGN(&rt[1]); MESH_RT_ENTRY_LOCK_INIT(rt, "MBSS_RT"); callout_init(&rt->rt_discovery, 1); rt->rt_updtime = ticks; /* create time */ TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next); } return rt; } struct ieee80211_mesh_route * ieee80211_mesh_rt_find(struct ieee80211vap *vap, const uint8_t dest[IEEE80211_ADDR_LEN]) { struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_mesh_route *rt; MESH_RT_LOCK(ms); rt = mesh_rt_find_locked(ms, dest); MESH_RT_UNLOCK(ms); return rt; } struct ieee80211_mesh_route * ieee80211_mesh_rt_add(struct ieee80211vap *vap, const uint8_t dest[IEEE80211_ADDR_LEN]) { struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_mesh_route *rt; KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL, ("%s: duplicate entry in the routing table", __func__)); KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest), ("%s: adding self to the routing table", __func__)); MESH_RT_LOCK(ms); rt = mesh_rt_add_locked(vap, dest); MESH_RT_UNLOCK(ms); return rt; } /* * Update the route lifetime and returns the updated lifetime. * If new_lifetime is zero and route is timedout it will be invalidated. * new_lifetime is in msec */ int ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime) { int timesince, now; uint32_t lifetime = 0; KASSERT(rt != NULL, ("route is NULL")); now = ticks; MESH_RT_ENTRY_LOCK(rt); /* dont clobber a proxy entry gated by us */ if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) { MESH_RT_ENTRY_UNLOCK(rt); return rt->rt_lifetime; } timesince = ticks_to_msecs(now - rt->rt_updtime); rt->rt_updtime = now; if (timesince >= rt->rt_lifetime) { if (new_lifetime != 0) { rt->rt_lifetime = new_lifetime; } else { rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID; rt->rt_lifetime = 0; } } else { /* update what is left of lifetime */ rt->rt_lifetime = rt->rt_lifetime - timesince; rt->rt_lifetime = MESH_ROUTE_LIFETIME_MAX( new_lifetime, rt->rt_lifetime); } lifetime = rt->rt_lifetime; MESH_RT_ENTRY_UNLOCK(rt); return lifetime; } /* * Add a proxy route (as needed) for the specified destination. */ void ieee80211_mesh_proxy_check(struct ieee80211vap *vap, const uint8_t dest[IEEE80211_ADDR_LEN]) { struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_mesh_route *rt; MESH_RT_LOCK(ms); rt = mesh_rt_find_locked(ms, dest); if (rt == NULL) { rt = mesh_rt_add_locked(vap, dest); if (rt == NULL) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, "%s", "unable to add proxy entry"); vap->iv_stats.is_mesh_rtaddfailed++; } else { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, "%s", "add proxy entry"); IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr); IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID | IEEE80211_MESHRT_FLAGS_PROXY; } } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY, ("no proxy flag for poxy entry")); struct ieee80211com *ic = vap->iv_ic; /* * Fix existing entry created by received frames from * stations that have some memory of dest. We also * flush any frames held on the staging queue; delivering * them is too much trouble right now. */ IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, "%s", "fix proxy entry"); IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID | IEEE80211_MESHRT_FLAGS_PROXY; /* XXX belongs in hwmp */ ieee80211_ageq_drain_node(&ic->ic_stageq, (void *)(uintptr_t) ieee80211_mac_hash(ic, dest)); /* XXX stat? */ } MESH_RT_UNLOCK(ms); } static __inline void mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt) { TAILQ_REMOVE(&ms->ms_routes, rt, rt_next); /* * Grab the lock before destroying it, to be sure no one else * is holding the route. */ MESH_RT_ENTRY_LOCK(rt); callout_drain(&rt->rt_discovery); MESH_RT_ENTRY_LOCK_DESTROY(rt); IEEE80211_FREE(rt, M_80211_MESH_RT); } void ieee80211_mesh_rt_del(struct ieee80211vap *vap, const uint8_t dest[IEEE80211_ADDR_LEN]) { struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_mesh_route *rt, *next; MESH_RT_LOCK(ms); TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) { if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { ms->ms_ppath->mpp_senderror(vap, dest, rt, IEEE80211_REASON_MESH_PERR_NO_PROXY); } else { ms->ms_ppath->mpp_senderror(vap, dest, rt, IEEE80211_REASON_MESH_PERR_DEST_UNREACH); } mesh_rt_del(ms, rt); MESH_RT_UNLOCK(ms); return; } } MESH_RT_UNLOCK(ms); } void ieee80211_mesh_rt_flush(struct ieee80211vap *vap) { struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_mesh_route *rt, *next; if (ms == NULL) return; MESH_RT_LOCK(ms); TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) mesh_rt_del(ms, rt); MESH_RT_UNLOCK(ms); } void ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap, const uint8_t peer[IEEE80211_ADDR_LEN]) { struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_mesh_route *rt, *next; MESH_RT_LOCK(ms); TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer)) mesh_rt_del(ms, rt); } MESH_RT_UNLOCK(ms); } /* * Flush expired routing entries, i.e. those in invalid state for * some time. */ static void mesh_rt_flush_invalid(struct ieee80211vap *vap) { struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_mesh_route *rt, *next; if (ms == NULL) return; MESH_RT_LOCK(ms); TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { /* Discover paths will be deleted by their own callout */ if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER) continue; ieee80211_mesh_rt_update(rt, 0); if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) mesh_rt_del(ms, rt); } MESH_RT_UNLOCK(ms); } int ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp) { int i, firstempty = -1; for (i = 0; i < nitems(mesh_proto_paths); i++) { if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr, IEEE80211_MESH_PROTO_DSZ) == 0) return EEXIST; if (!mesh_proto_paths[i].mpp_active && firstempty == -1) firstempty = i; } if (firstempty < 0) return ENOSPC; memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp)); mesh_proto_paths[firstempty].mpp_active = 1; return 0; } int ieee80211_mesh_register_proto_metric(const struct ieee80211_mesh_proto_metric *mpm) { int i, firstempty = -1; for (i = 0; i < nitems(mesh_proto_metrics); i++) { if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr, IEEE80211_MESH_PROTO_DSZ) == 0) return EEXIST; if (!mesh_proto_metrics[i].mpm_active && firstempty == -1) firstempty = i; } if (firstempty < 0) return ENOSPC; memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm)); mesh_proto_metrics[firstempty].mpm_active = 1; return 0; } static int mesh_select_proto_path(struct ieee80211vap *vap, const char *name) { struct ieee80211_mesh_state *ms = vap->iv_mesh; int i; for (i = 0; i < nitems(mesh_proto_paths); i++) { if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) { ms->ms_ppath = &mesh_proto_paths[i]; return 0; } } return ENOENT; } static int mesh_select_proto_metric(struct ieee80211vap *vap, const char *name) { struct ieee80211_mesh_state *ms = vap->iv_mesh; int i; for (i = 0; i < nitems(mesh_proto_metrics); i++) { if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) { ms->ms_pmetric = &mesh_proto_metrics[i]; return 0; } } return ENOENT; } static void mesh_gatemode_setup(struct ieee80211vap *vap) { struct ieee80211_mesh_state *ms = vap->iv_mesh; /* * NB: When a mesh gate is running as a ROOT it shall * not send out periodic GANNs but instead mark the * mesh gate flag for the corresponding proactive PREQ * and RANN frames. */ if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT || (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) { callout_drain(&ms->ms_gatetimer); return ; } callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint, mesh_gatemode_cb, vap); } static void mesh_gatemode_cb(void *arg) { struct ieee80211vap *vap = (struct ieee80211vap *)arg; struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_meshgann_ie gann; gann.gann_flags = 0; /* Reserved */ gann.gann_hopcount = 0; gann.gann_ttl = ms->ms_ttl; IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr); gann.gann_seq = ms->ms_gateseq++; gann.gann_interval = ieee80211_mesh_gateint; IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss, "send broadcast GANN (seq %u)", gann.gann_seq); ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, IEEE80211_ACTION_MESH_GANN, &gann); mesh_gatemode_setup(vap); } static void ieee80211_mesh_init(void) { memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths)); memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics)); /* * Setup mesh parameters that depends on the clock frequency. */ ieee80211_mesh_gateint = msecs_to_ticks(10000); ieee80211_mesh_retrytimeout = msecs_to_ticks(40); ieee80211_mesh_holdingtimeout = msecs_to_ticks(40); ieee80211_mesh_confirmtimeout = msecs_to_ticks(40); ieee80211_mesh_backofftimeout = msecs_to_ticks(5000); /* * Register action frame handlers. */ ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_OPEN, mesh_recv_action_meshpeering_open); ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CONFIRM, mesh_recv_action_meshpeering_confirm); ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CLOSE, mesh_recv_action_meshpeering_close); ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric); ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate); ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_OPEN, mesh_send_action_meshpeering_open); ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CONFIRM, mesh_send_action_meshpeering_confirm); ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CLOSE, mesh_send_action_meshpeering_close); ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, IEEE80211_ACTION_MESH_LMETRIC, mesh_send_action_meshlmetric); ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, IEEE80211_ACTION_MESH_GANN, mesh_send_action_meshgate); /* * Register Airtime Link Metric. */ ieee80211_mesh_register_proto_metric(&mesh_metric_airtime); } SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL); void ieee80211_mesh_attach(struct ieee80211com *ic) { ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach; } void ieee80211_mesh_detach(struct ieee80211com *ic) { } static void mesh_vdetach_peers(void *arg, struct ieee80211_node *ni) { struct ieee80211com *ic = ni->ni_ic; uint16_t args[3]; if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) { args[0] = ni->ni_mlpid; args[1] = ni->ni_mllid; args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CLOSE, args); } callout_drain(&ni->ni_mltimer); /* XXX belongs in hwmp */ ieee80211_ageq_drain_node(&ic->ic_stageq, (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); } static void mesh_vdetach(struct ieee80211vap *vap) { struct ieee80211_mesh_state *ms = vap->iv_mesh; callout_drain(&ms->ms_cleantimer); ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers, NULL); ieee80211_mesh_rt_flush(vap); MESH_RT_LOCK_DESTROY(ms); ms->ms_ppath->mpp_vdetach(vap); IEEE80211_FREE(vap->iv_mesh, M_80211_VAP); vap->iv_mesh = NULL; } static void mesh_vattach(struct ieee80211vap *vap) { struct ieee80211_mesh_state *ms; vap->iv_newstate = mesh_newstate; vap->iv_input = mesh_input; vap->iv_opdetach = mesh_vdetach; vap->iv_recv_mgmt = mesh_recv_mgmt; vap->iv_recv_ctl = mesh_recv_ctl; ms = IEEE80211_MALLOC(sizeof(struct ieee80211_mesh_state), M_80211_VAP, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); if (ms == NULL) { printf("%s: couldn't alloc MBSS state\n", __func__); return; } vap->iv_mesh = ms; ms->ms_seq = 0; ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD); ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL; TAILQ_INIT(&ms->ms_known_gates); TAILQ_INIT(&ms->ms_routes); MESH_RT_LOCK_INIT(ms, "MBSS"); callout_init(&ms->ms_cleantimer, 1); callout_init(&ms->ms_gatetimer, 1); ms->ms_gateseq = 0; mesh_select_proto_metric(vap, "AIRTIME"); KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL")); mesh_select_proto_path(vap, "HWMP"); KASSERT(ms->ms_ppath, ("ms_ppath == NULL")); ms->ms_ppath->mpp_vattach(vap); } /* * IEEE80211_M_MBSS vap state machine handler. */ static int mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) { struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211com *ic = vap->iv_ic; struct ieee80211_node *ni; enum ieee80211_state ostate; IEEE80211_LOCK_ASSERT(ic); ostate = vap->iv_state; IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", __func__, ieee80211_state_name[ostate], ieee80211_state_name[nstate], arg); vap->iv_state = nstate; /* state transition */ if (ostate != IEEE80211_S_SCAN) ieee80211_cancel_scan(vap); /* background scan */ ni = vap->iv_bss; /* NB: no reference held */ if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) { callout_drain(&ms->ms_cleantimer); callout_drain(&ms->ms_gatetimer); } switch (nstate) { case IEEE80211_S_INIT: switch (ostate) { case IEEE80211_S_SCAN: ieee80211_cancel_scan(vap); break; case IEEE80211_S_CAC: ieee80211_dfs_cac_stop(vap); break; case IEEE80211_S_RUN: ieee80211_iterate_nodes(&ic->ic_sta, mesh_vdetach_peers, NULL); break; default: break; } if (ostate != IEEE80211_S_INIT) { /* NB: optimize INIT -> INIT case */ ieee80211_reset_bss(vap); ieee80211_mesh_rt_flush(vap); } break; case IEEE80211_S_SCAN: switch (ostate) { case IEEE80211_S_INIT: if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) && ms->ms_idlen != 0) { /* * Already have a channel and a mesh ID; bypass * the scan and startup immediately. */ ieee80211_create_ibss(vap, vap->iv_des_chan); break; } /* * Initiate a scan. We can come here as a result * of an IEEE80211_IOC_SCAN_REQ too in which case * the vap will be marked with IEEE80211_FEXT_SCANREQ * and the scan request parameters will be present * in iv_scanreq. Otherwise we do the default. */ if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { ieee80211_check_scan(vap, vap->iv_scanreq_flags, vap->iv_scanreq_duration, vap->iv_scanreq_mindwell, vap->iv_scanreq_maxdwell, vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; } else ieee80211_check_scan_current(vap); break; default: break; } break; case IEEE80211_S_CAC: /* * Start CAC on a DFS channel. We come here when starting * a bss on a DFS channel (see ieee80211_create_ibss). */ ieee80211_dfs_cac_start(vap); break; case IEEE80211_S_RUN: switch (ostate) { case IEEE80211_S_INIT: /* * Already have a channel; bypass the * scan and startup immediately. * Note that ieee80211_create_ibss will call * back to do a RUN->RUN state change. */ ieee80211_create_ibss(vap, ieee80211_ht_adjust_channel(ic, ic->ic_curchan, vap->iv_flags_ht)); /* NB: iv_bss is changed on return */ break; case IEEE80211_S_CAC: /* * NB: This is the normal state change when CAC * expires and no radar was detected; no need to * clear the CAC timer as it's already expired. */ /* fall thru... */ case IEEE80211_S_CSA: #if 0 /* * Shorten inactivity timer of associated stations * to weed out sta's that don't follow a CSA. */ ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); #endif /* * Update bss node channel to reflect where * we landed after CSA. */ ieee80211_node_set_chan(ni, ieee80211_ht_adjust_channel(ic, ic->ic_curchan, ieee80211_htchanflags(ni->ni_chan))); /* XXX bypass debug msgs */ break; case IEEE80211_S_SCAN: case IEEE80211_S_RUN: #ifdef IEEE80211_DEBUG if (ieee80211_msg_debug(vap)) { ieee80211_note(vap, "synchronized with %s meshid ", ether_sprintf(ni->ni_meshid)); ieee80211_print_essid(ni->ni_meshid, ni->ni_meshidlen); /* XXX MCS/HT */ printf(" channel %d\n", ieee80211_chan2ieee(ic, ic->ic_curchan)); } #endif break; default: break; } ieee80211_node_authorize(ni); callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, mesh_rt_cleanup_cb, vap); mesh_gatemode_setup(vap); break; default: break; } /* NB: ostate not nstate */ ms->ms_ppath->mpp_newstate(vap, ostate, arg); return 0; } static void mesh_rt_cleanup_cb(void *arg) { struct ieee80211vap *vap = arg; struct ieee80211_mesh_state *ms = vap->iv_mesh; mesh_rt_flush_invalid(vap); callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, mesh_rt_cleanup_cb, vap); } /* * Mark a mesh STA as gate and return a pointer to it. * If this is first time, we create a new gate route. * Always update the path route to this mesh gate. */ struct ieee80211_mesh_gate_route * ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr, struct ieee80211_mesh_route *rt) { struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_mesh_gate_route *gr = NULL, *next; int found = 0; MESH_RT_LOCK(ms); TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) { found = 1; break; } } if (!found) { /* New mesh gate add it to known table. */ IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr, "%s", "stored new gate information from pro-PREQ."); gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), M_80211_MESH_GT_RT, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); IEEE80211_ADDR_COPY(gr->gr_addr, addr); TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); } gr->gr_route = rt; /* TODO: link from path route to gate route */ MESH_RT_UNLOCK(ms); return gr; } /* * Helper function to note the Mesh Peer Link FSM change. */ static void mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211_mesh_state *ms = vap->iv_mesh; #ifdef IEEE80211_DEBUG static const char *meshlinkstates[] = { [IEEE80211_NODE_MESH_IDLE] = "IDLE", [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT", [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED", [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED", [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED", [IEEE80211_NODE_MESH_HOLDING] = "HOLDING" }; #endif IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, ni, "peer link: %s -> %s", meshlinkstates[ni->ni_mlstate], meshlinkstates[state]); /* track neighbor count */ if (state == IEEE80211_NODE_MESH_ESTABLISHED && ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow")); ms->ms_neighbors++; ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED && state != IEEE80211_NODE_MESH_ESTABLISHED) { KASSERT(ms->ms_neighbors > 0, ("neighbor count 0")); ms->ms_neighbors--; ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); } ni->ni_mlstate = state; switch (state) { case IEEE80211_NODE_MESH_HOLDING: ms->ms_ppath->mpp_peerdown(ni); break; case IEEE80211_NODE_MESH_ESTABLISHED: ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL); break; default: break; } } /* * Helper function to generate a unique local ID required for mesh * peer establishment. */ static void mesh_checkid(void *arg, struct ieee80211_node *ni) { uint16_t *r = arg; if (*r == ni->ni_mllid) *(uint16_t *)arg = 0; } static uint32_t mesh_generateid(struct ieee80211vap *vap) { int maxiter = 4; uint16_t r; do { - get_random_bytes(&r, 2); + net80211_get_random_bytes(&r, 2); ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r); maxiter--; } while (r == 0 && maxiter > 0); return r; } /* * Verifies if we already received this packet by checking its * sequence number. * Returns 0 if the frame is to be accepted, 1 otherwise. */ static int mesh_checkpseq(struct ieee80211vap *vap, const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq) { struct ieee80211_mesh_route *rt; rt = ieee80211_mesh_rt_find(vap, source); if (rt == NULL) { rt = ieee80211_mesh_rt_add(vap, source); if (rt == NULL) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, "%s", "add mcast route failed"); vap->iv_stats.is_mesh_rtaddfailed++; return 1; } IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, "add mcast route, mesh seqno %d", seq); rt->rt_lastmseq = seq; return 0; } if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) { return 1; } else { rt->rt_lastmseq = seq; return 0; } } /* * Iterate the routing table and locate the next hop. */ struct ieee80211_node * ieee80211_mesh_find_txnode(struct ieee80211vap *vap, const uint8_t dest[IEEE80211_ADDR_LEN]) { struct ieee80211_mesh_route *rt; rt = ieee80211_mesh_rt_find(vap, dest); if (rt == NULL) return NULL; if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, "%s: !valid, flags 0x%x", __func__, rt->rt_flags); /* XXX stat */ return NULL; } if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate); if (rt == NULL) return NULL; if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, "%s: meshgate !valid, flags 0x%x", __func__, rt->rt_flags); /* XXX stat */ return NULL; } } return ieee80211_find_txnode(vap, rt->rt_nexthop); } static void mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m, struct ieee80211_mesh_route *rt_gate) { struct ifnet *ifp = vap->iv_ifp; struct ieee80211_node *ni; IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest); if (ni == NULL) { if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); m_freem(m); return; } /* * Send through the VAP packet transmit path. * This consumes the node ref grabbed above and * the mbuf, regardless of whether there's a problem * or not. */ (void) ieee80211_vap_pkt_send_dest(vap, m, ni); } /* * Forward the queued frames to known valid mesh gates. * Assume destination to be outside the MBSS (i.e. proxy entry), * If no valid mesh gates are known silently discard queued frames. * After transmitting frames to all known valid mesh gates, this route * will be marked invalid, and a new path discovery will happen in the hopes * that (at least) one of the mesh gates have a new proxy entry for us to use. */ void ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap, struct ieee80211_mesh_route *rt_dest) { struct ieee80211com *ic = vap->iv_ic; struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_mesh_route *rt_gate; struct ieee80211_mesh_gate_route *gr = NULL, *gr_next; struct mbuf *m, *mcopy, *next; IEEE80211_TX_UNLOCK_ASSERT(ic); KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER, ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER")); /* XXX: send to more than one valid mash gate */ MESH_RT_LOCK(ms); m = ieee80211_ageq_remove(&ic->ic_stageq, (struct ieee80211_node *)(uintptr_t) ieee80211_mac_hash(ic, rt_dest->rt_dest)); TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) { rt_gate = gr->gr_route; if (rt_gate == NULL) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, rt_dest->rt_dest, "mesh gate with no path %6D", gr->gr_addr, ":"); continue; } if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) continue; KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE, ("route not marked as a mesh gate")); KASSERT((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0, ("found mesh gate that is also marked porxy")); /* * convert route to a proxy route gated by the current * mesh gate, this is needed so encap can built data * frame with correct address. */ rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY | IEEE80211_MESHRT_FLAGS_VALID; rt_dest->rt_ext_seq = 1; /* random value */ IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest); IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop); rt_dest->rt_metric = rt_gate->rt_metric; rt_dest->rt_nhops = rt_gate->rt_nhops; ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact); MESH_RT_UNLOCK(ms); /* XXX: lock?? */ mcopy = m_dup(m, M_NOWAIT); for (; mcopy != NULL; mcopy = next) { next = mcopy->m_nextpkt; mcopy->m_nextpkt = NULL; IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, rt_dest->rt_dest, "flush queued frame %p len %d", mcopy, mcopy->m_pkthdr.len); mesh_transmit_to_gate(vap, mcopy, rt_gate); } MESH_RT_LOCK(ms); } rt_dest->rt_flags = 0; /* Mark invalid */ m_freem(m); MESH_RT_UNLOCK(ms); } /* * Forward the specified frame. * Decrement the TTL and set TA to our MAC address. */ static void mesh_forward(struct ieee80211vap *vap, struct mbuf *m, const struct ieee80211_meshcntl *mc) { struct ieee80211com *ic = vap->iv_ic; struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ifnet *ifp = vap->iv_ifp; const struct ieee80211_frame *wh = mtod(m, const struct ieee80211_frame *); struct mbuf *mcopy; struct ieee80211_meshcntl *mccopy; struct ieee80211_frame *whcopy; struct ieee80211_node *ni; int err; /* This is called from the RX path - don't hold this lock */ IEEE80211_TX_UNLOCK_ASSERT(ic); /* * mesh ttl of 1 means we are the last one receiving it, * according to amendment we decrement and then check if * 0, if so we dont forward. */ if (mc->mc_ttl < 1) { IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, "%s", "frame not fwd'd, ttl 1"); vap->iv_stats.is_mesh_fwd_ttl++; return; } if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, "%s", "frame not fwd'd, fwding disabled"); vap->iv_stats.is_mesh_fwd_disabled++; return; } mcopy = m_dup(m, M_NOWAIT); if (mcopy == NULL) { IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, "%s", "frame not fwd'd, cannot dup"); vap->iv_stats.is_mesh_fwd_nobuf++; if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); return; } mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + sizeof(struct ieee80211_meshcntl)); if (mcopy == NULL) { IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, "%s", "frame not fwd'd, too short"); vap->iv_stats.is_mesh_fwd_tooshort++; if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); m_freem(mcopy); return; } whcopy = mtod(mcopy, struct ieee80211_frame *); mccopy = (struct ieee80211_meshcntl *) (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); /* XXX clear other bits? */ whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { ni = ieee80211_ref_node(vap->iv_bss); mcopy->m_flags |= M_MCAST; } else { ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3); if (ni == NULL) { /* * [Optional] any of the following three actions: * o silently discard * o trigger a path discovery * o inform TA that meshDA is unknown. */ IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, "%s", "frame not fwd'd, no path"); ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL, IEEE80211_REASON_MESH_PERR_NO_FI); vap->iv_stats.is_mesh_fwd_nopath++; m_freem(mcopy); return; } IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); } KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); mccopy->mc_ttl--; /* XXX calculate priority so drivers can find the tx queue */ M_WME_SETAC(mcopy, WME_AC_BE); /* XXX do we know m_nextpkt is NULL? */ MPASS((mcopy->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0); mcopy->m_pkthdr.rcvif = (void *) ni; /* * XXX this bypasses all of the VAP TX handling; it passes frames * directly to the parent interface. * * Because of this, there's no TX lock being held as there's no * encaps state being used. * * Doing a direct parent transmit may not be the correct thing * to do here; we'll have to re-think this soon. */ IEEE80211_TX_LOCK(ic); err = ieee80211_parent_xmitpkt(ic, mcopy); IEEE80211_TX_UNLOCK(ic); if (!err) if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); } static struct mbuf * mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen) { #define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) uint8_t b[sizeof(struct ieee80211_qosframe_addr4) + sizeof(struct ieee80211_meshcntl_ae10)]; const struct ieee80211_qosframe_addr4 *wh; const struct ieee80211_meshcntl_ae10 *mc; struct ether_header *eh; struct llc *llc; int ae; if (m->m_len < hdrlen + sizeof(*llc) && (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, "discard data frame: %s", "m_pullup failed"); vap->iv_stats.is_rx_tooshort++; return NULL; } memcpy(b, mtod(m, caddr_t), hdrlen); wh = (const struct ieee80211_qosframe_addr4 *)&b[0]; mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen]; KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS || WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS, ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && /* NB: preserve AppleTalk frames that have a native SNAP hdr */ !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) || llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); llc = NULL; } else { m_adj(m, hdrlen - sizeof(*eh)); } eh = mtod(m, struct ether_header *); ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) { IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1); if (ae == IEEE80211_MESH_AE_00) { IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3); } else if (ae == IEEE80211_MESH_AE_01) { IEEE80211_ADDR_COPY(eh->ether_shost, MC01(mc)->mc_addr4); } else { IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, (const struct ieee80211_frame *)wh, NULL, "bad AE %d", ae); vap->iv_stats.is_mesh_badae++; m_freem(m); return NULL; } } else { if (ae == IEEE80211_MESH_AE_00) { IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3); IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4); } else if (ae == IEEE80211_MESH_AE_10) { IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5); IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6); } else { IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, (const struct ieee80211_frame *)wh, NULL, "bad AE %d", ae); vap->iv_stats.is_mesh_badae++; m_freem(m); return NULL; } } #ifndef __NO_STRICT_ALIGNMENT if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { m = ieee80211_realign(vap, m, sizeof(*eh)); if (m == NULL) return NULL; } #endif /* !__NO_STRICT_ALIGNMENT */ if (llc != NULL) { eh = mtod(m, struct ether_header *); eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); } return m; #undef WDIR #undef MC01 } /* * Return non-zero if the unicast mesh data frame should be processed * locally. Frames that are not proxy'd have our address, otherwise * we need to consult the routing table to look for a proxy entry. */ static __inline int mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) { int ae = mc->mc_flags & 3; KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS, ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae)); if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */ const struct ieee80211_meshcntl_ae10 *mc10 = (const struct ieee80211_meshcntl_ae10 *) mc; struct ieee80211_mesh_route *rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5); /* check for proxy route to ourself */ return (rt != NULL && (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)); } else /* ucast w/o proxy */ return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); } /* * Verifies transmitter, updates lifetime, precursor list and forwards data. * > 0 means we have forwarded data and no need to process locally * == 0 means we want to process locally (and we may have forwarded data * < 0 means there was an error and data should be discarded */ static int mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m, struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) { struct ieee80211_qosframe_addr4 *qwh; struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_mesh_route *rt_meshda, *rt_meshsa; /* This is called from the RX path - don't hold this lock */ IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); qwh = (struct ieee80211_qosframe_addr4 *)wh; /* * TODO: * o verify addr2 is a legitimate transmitter * o lifetime of precursor of addr3 (addr2) is max(init, curr) * o lifetime of precursor of addr4 (nexthop) is max(init, curr) */ /* set lifetime of addr3 (meshDA) to initial value */ rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3); if (rt_meshda == NULL) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2, "no route to meshDA(%6D)", qwh->i_addr3, ":"); /* * [Optional] any of the following three actions: * o silently discard [X] * o trigger a path discovery [ ] * o inform TA that meshDA is unknown. [ ] */ /* XXX: stats */ return (-1); } ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs( ms->ms_ppath->mpp_inact)); /* set lifetime of addr4 (meshSA) to initial value */ rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4); KASSERT(rt_meshsa != NULL, ("no route")); ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs( ms->ms_ppath->mpp_inact)); mesh_forward(vap, m, mc); return (1); /* dont process locally */ } /* * Verifies transmitter, updates lifetime, precursor list and process data * locally, if data is proxy with AE = 10 it could mean data should go * on another mesh path or data should be forwarded to the DS. * * > 0 means we have forwarded data and no need to process locally * == 0 means we want to process locally (and we may have forwarded data * < 0 means there was an error and data should be discarded */ static int mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m, struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) { struct ieee80211_qosframe_addr4 *qwh; const struct ieee80211_meshcntl_ae10 *mc10; struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_mesh_route *rt; int ae; /* This is called from the RX path - don't hold this lock */ IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); qwh = (struct ieee80211_qosframe_addr4 *)wh; mc10 = (const struct ieee80211_meshcntl_ae10 *)mc; /* * TODO: * o verify addr2 is a legitimate transmitter * o lifetime of precursor entry is max(init, curr) */ /* set lifetime of addr4 (meshSA) to initial value */ rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4); KASSERT(rt != NULL, ("no route")); ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact)); rt = NULL; ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK; KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae)); if (ae == IEEE80211_MESH_AE_10) { if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) { return (0); /* process locally */ } rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5); if (rt != NULL && (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) && (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) { /* * Forward on another mesh-path, according to * amendment as specified in 9.32.4.1 */ IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5); mesh_forward(vap, m, (const struct ieee80211_meshcntl *)mc10); return (1); /* dont process locally */ } /* * All other cases: forward of MSDUs from the MBSS to DS indiv. * addressed according to 13.11.3.2. */ IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2, "forward frame to DS, SA(%6D) DA(%6D)", mc10->mc_addr6, ":", mc10->mc_addr5, ":"); } return (0); /* process locally */ } /* * Try to forward the group addressed data on to other mesh STAs, and * also to the DS. * * > 0 means we have forwarded data and no need to process locally * == 0 means we want to process locally (and we may have forwarded data * < 0 means there was an error and data should be discarded */ static int mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m, struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) { #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) struct ieee80211_mesh_state *ms = vap->iv_mesh; /* This is called from the RX path - don't hold this lock */ IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); mesh_forward(vap, m, mc); if(mc->mc_ttl > 0) { if (mc->mc_flags & IEEE80211_MESH_AE_01) { /* * Forward of MSDUs from the MBSS to DS group addressed * (according to 13.11.3.2) * This happens by delivering the packet, and a bridge * will sent it on another port member. */ if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE && ms->ms_flags & IEEE80211_MESHFLAGS_FWD) { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, MC01(mc)->mc_addr4, "%s", "forward from MBSS to the DS"); } } } return (0); /* process locally */ #undef MC01 } static int mesh_input(struct ieee80211_node *ni, struct mbuf *m, const struct ieee80211_rx_stats *rxs, int rssi, int nf) { #define HAS_SEQ(type) ((type & 0x4) == 0) #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; struct ifnet *ifp = vap->iv_ifp; struct ieee80211_frame *wh; const struct ieee80211_meshcntl *mc; int hdrspace, meshdrlen, need_tap, error; uint8_t dir, type, subtype, ae; uint32_t seq; const uint8_t *addr; uint8_t qos[2]; KASSERT(ni != NULL, ("null node")); ni->ni_inact = ni->ni_inact_reload; need_tap = 1; /* mbuf need to be tapped. */ type = -1; /* undefined */ /* This is called from the RX path - don't hold this lock */ IEEE80211_TX_UNLOCK_ASSERT(ic); if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, "too short (1): len %u", m->m_pkthdr.len); vap->iv_stats.is_rx_tooshort++; goto out; } /* * Bit of a cheat here, we use a pointer for a 3-address * frame format but don't reference fields past outside * ieee80211_frame_min w/o first validating the data is * present. */ wh = mtod(m, struct ieee80211_frame *); if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != IEEE80211_FC0_VERSION_0) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); vap->iv_stats.is_rx_badversion++; goto err; } dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); ni->ni_noise = nf; if (HAS_SEQ(type)) { uint8_t tid = ieee80211_gettid(wh); if (IEEE80211_QOS_HAS_SEQ(wh) && TID_TO_WME_AC(tid) >= WME_AC_VI) ic->ic_wme.wme_hipri_traffic++; if (! ieee80211_check_rxseq(ni, wh, wh->i_addr1, rxs)) goto out; } } #ifdef IEEE80211_DEBUG /* * It's easier, but too expensive, to simulate different mesh * topologies by consulting the ACL policy very early, so do this * only under DEBUG. * * NB: this check is also done upon peering link initiation. */ if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, wh, NULL, "%s", "disallowed by ACL"); vap->iv_stats.is_rx_acl++; goto out; } #endif switch (type) { case IEEE80211_FC0_TYPE_DATA: if (ni == vap->iv_bss) goto out; if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, NULL, "peer link not yet established (%d)", ni->ni_mlstate); vap->iv_stats.is_mesh_nolink++; goto out; } if (dir != IEEE80211_FC1_DIR_FROMDS && dir != IEEE80211_FC1_DIR_DSTODS) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "data", "incorrect dir 0x%x", dir); vap->iv_stats.is_rx_wrongdir++; goto err; } /* All Mesh data frames are QoS subtype */ if (!HAS_SEQ(type)) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "data", "incorrect subtype 0x%x", subtype); vap->iv_stats.is_rx_badsubtype++; goto err; } /* * Next up, any fragmentation. * XXX: we defrag before we even try to forward, * Mesh Control field is not present in sub-sequent * fragmented frames. This is in contrast to Draft 4.0. */ hdrspace = ieee80211_hdrspace(ic, wh); if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { m = ieee80211_defrag(ni, m, hdrspace); if (m == NULL) { /* Fragment dropped or frame not complete yet */ goto out; } } wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */ /* * Now we have a complete Mesh Data frame. */ /* * Only fromDStoDS data frames use 4 address qos frames * as specified in amendment. Otherwise addr4 is located * in the Mesh Control field and a 3 address qos frame * is used. */ *(uint16_t *)qos = *(uint16_t *)ieee80211_getqos(wh); /* * NB: The mesh STA sets the Mesh Control Present * subfield to 1 in the Mesh Data frame containing * an unfragmented MSDU, an A-MSDU, or the first * fragment of an MSDU. * After defrag it should always be present. */ if (!(qos[1] & IEEE80211_QOS_MC)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, NULL, "%s", "Mesh control field not present"); vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */ goto err; } /* pull up enough to get to the mesh control */ if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && (m = m_pullup(m, hdrspace + sizeof(struct ieee80211_meshcntl))) == NULL) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, "data too short: expecting %u", hdrspace); vap->iv_stats.is_rx_tooshort++; goto out; /* XXX */ } /* * Now calculate the full extent of the headers. Note * mesh_decap will pull up anything we didn't get * above when it strips the 802.11 headers. */ mc = (const struct ieee80211_meshcntl *) (mtod(m, const uint8_t *) + hdrspace); ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; meshdrlen = sizeof(struct ieee80211_meshcntl) + ae * IEEE80211_ADDR_LEN; hdrspace += meshdrlen; /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */ if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) && (m->m_len < hdrspace) && ((m = m_pullup(m, hdrspace)) == NULL)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, "data too short: expecting %u", hdrspace); vap->iv_stats.is_rx_tooshort++; goto out; /* XXX */ } /* XXX: are we sure there is no reallocating after m_pullup? */ seq = le32dec(mc->mc_seq); if (IEEE80211_IS_MULTICAST(wh->i_addr1)) addr = wh->i_addr3; else if (ae == IEEE80211_MESH_AE_01) addr = MC01(mc)->mc_addr4; else addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, addr, "data", "%s", "not to me"); vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ goto out; } if (mesh_checkpseq(vap, addr, seq) != 0) { vap->iv_stats.is_rx_dup++; goto out; } /* This code "routes" the frame to the right control path */ if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3)) error = mesh_recv_indiv_data_to_me(vap, m, wh, mc); else if (IEEE80211_IS_MULTICAST(wh->i_addr3)) error = mesh_recv_group_data(vap, m, wh, mc); else error = mesh_recv_indiv_data_to_fwrd(vap, m, wh, mc); } else error = mesh_recv_group_data(vap, m, wh, mc); if (error < 0) goto err; else if (error > 0) goto out; if (ieee80211_radiotap_active_vap(vap)) ieee80211_radiotap_rx(vap, m); need_tap = 0; /* * Finally, strip the 802.11 header. */ m = mesh_decap(vap, m, hdrspace, meshdrlen); if (m == NULL) { /* XXX mask bit to check for both */ /* don't count Null data frames as errors */ if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) goto out; IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, ni->ni_macaddr, "data", "%s", "decap error"); vap->iv_stats.is_rx_decap++; IEEE80211_NODE_STAT(ni, rx_decap); goto err; } if (qos[0] & IEEE80211_QOS_AMSDU) { m = ieee80211_decap_amsdu(ni, m); if (m == NULL) return IEEE80211_FC0_TYPE_DATA; } ieee80211_deliver_data(vap, ni, m); return type; case IEEE80211_FC0_TYPE_MGT: vap->iv_stats.is_rx_mgmt++; IEEE80211_NODE_STAT(ni, rx_mgmt); if (dir != IEEE80211_FC1_DIR_NODS) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "mgt", "incorrect dir 0x%x", dir); vap->iv_stats.is_rx_wrongdir++; goto err; } if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, ni->ni_macaddr, "mgt", "too short: len %u", m->m_pkthdr.len); vap->iv_stats.is_rx_tooshort++; goto out; } #ifdef IEEE80211_DEBUG if ((ieee80211_msg_debug(vap) && (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || ieee80211_msg_dumppkts(vap)) { if_printf(ifp, "received %s from %s rssi %d\n", ieee80211_mgt_subtype_name(subtype), ether_sprintf(wh->i_addr2), rssi); } #endif if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "WEP set but not permitted"); vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ goto out; } vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); goto out; case IEEE80211_FC0_TYPE_CTL: vap->iv_stats.is_rx_ctl++; IEEE80211_NODE_STAT(ni, rx_ctrl); goto out; default: IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, wh, "bad", "frame type 0x%x", type); /* should not come here */ break; } err: if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); out: if (m != NULL) { if (need_tap && ieee80211_radiotap_active_vap(vap)) ieee80211_radiotap_rx(vap, m); m_freem(m); } return type; #undef HAS_SEQ #undef MC01 } static void mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, const struct ieee80211_rx_stats *rxs, int rssi, int nf) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211com *ic = ni->ni_ic; struct ieee80211_channel *rxchan = ic->ic_curchan; struct ieee80211_frame *wh; struct ieee80211_mesh_route *rt; uint8_t *frm, *efrm; wh = mtod(m0, struct ieee80211_frame *); frm = (uint8_t *)&wh[1]; efrm = mtod(m0, uint8_t *) + m0->m_len; switch (subtype) { case IEEE80211_FC0_SUBTYPE_PROBE_RESP: case IEEE80211_FC0_SUBTYPE_BEACON: { struct ieee80211_scanparams scan; struct ieee80211_channel *c; /* * We process beacon/probe response * frames to discover neighbors. */ if (rxs != NULL) { c = ieee80211_lookup_channel_rxstatus(vap, rxs); if (c != NULL) rxchan = c; } if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0) return; /* * Count frame now that we know it's to be processed. */ if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { vap->iv_stats.is_rx_beacon++; /* XXX remove */ IEEE80211_NODE_STAT(ni, rx_beacons); } else IEEE80211_NODE_STAT(ni, rx_proberesp); /* * If scanning, just pass information to the scan module. */ if (ic->ic_flags & IEEE80211_F_SCAN) { if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { /* * Actively scanning a channel marked passive; * send a probe request now that we know there * is 802.11 traffic present. * * XXX check if the beacon we recv'd gives * us what we need and suppress the probe req */ ieee80211_probe_curchan(vap, 1); ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; } ieee80211_add_scan(vap, rxchan, &scan, wh, subtype, rssi, nf); return; } /* The rest of this code assumes we are running */ if (vap->iv_state != IEEE80211_S_RUN) return; /* * Ignore non-mesh STAs. */ if ((scan.capinfo & (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || scan.meshid == NULL || scan.meshconf == NULL) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "beacon", "%s", "not a mesh sta"); vap->iv_stats.is_mesh_wrongmesh++; return; } /* * Ignore STAs for other mesh networks. */ if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || mesh_verify_meshconf(vap, scan.meshconf)) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, "beacon", "%s", "not for our mesh"); vap->iv_stats.is_mesh_wrongmesh++; return; } /* * Peer only based on the current ACL policy. */ if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, wh, NULL, "%s", "disallowed by ACL"); vap->iv_stats.is_rx_acl++; return; } /* * Do neighbor discovery. */ if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { /* * Create a new entry in the neighbor table. */ ni = ieee80211_add_neighbor(vap, wh, &scan); } /* * Automatically peer with discovered nodes if possible. */ if (ni != vap->iv_bss && (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) { switch (ni->ni_mlstate) { case IEEE80211_NODE_MESH_IDLE: { uint16_t args[1]; /* Wait for backoff callout to reset counter */ if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) return; ni->ni_mlpid = mesh_generateid(vap); if (ni->ni_mlpid == 0) return; mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); args[0] = ni->ni_mlpid; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_OPEN, args); ni->ni_mlrcnt = 0; mesh_peer_timeout_setup(ni); break; } case IEEE80211_NODE_MESH_ESTABLISHED: { /* * Valid beacon from a peer mesh STA * bump TA lifetime */ rt = ieee80211_mesh_rt_find(vap, wh->i_addr2); if(rt != NULL) { ieee80211_mesh_rt_update(rt, ticks_to_msecs( ms->ms_ppath->mpp_inact)); } break; } default: break; /* ignore */ } } break; } case IEEE80211_FC0_SUBTYPE_PROBE_REQ: { uint8_t *ssid, *meshid, *rates, *xrates; if (vap->iv_state != IEEE80211_S_RUN) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "wrong state %s", ieee80211_state_name[vap->iv_state]); vap->iv_stats.is_rx_mgtdiscard++; return; } if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { /* frame must be directed */ IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "not unicast"); vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ return; } /* * prreq frame format * [tlv] ssid * [tlv] supported rates * [tlv] extended supported rates * [tlv] mesh id */ ssid = meshid = rates = xrates = NULL; while (efrm - frm > 1) { IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); switch (*frm) { case IEEE80211_ELEMID_SSID: ssid = frm; break; case IEEE80211_ELEMID_RATES: rates = frm; break; case IEEE80211_ELEMID_XRATES: xrates = frm; break; case IEEE80211_ELEMID_MESHID: meshid = frm; break; } frm += frm[1] + 2; } IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); if (xrates != NULL) IEEE80211_VERIFY_ELEMENT(xrates, IEEE80211_RATE_MAXSIZE - rates[1], return); if (meshid != NULL) { IEEE80211_VERIFY_ELEMENT(meshid, IEEE80211_MESHID_LEN, return); /* NB: meshid, not ssid */ IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); } /* XXX find a better class or define it's own */ IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, "%s", "recv probe req"); /* * Some legacy 11b clients cannot hack a complete * probe response frame. When the request includes * only a bare-bones rate set, communicate this to * the transmit side. */ ieee80211_send_proberesp(vap, wh->i_addr2, 0); break; } case IEEE80211_FC0_SUBTYPE_ACTION: case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: if (ni == vap->iv_bss) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "unknown node"); vap->iv_stats.is_rx_mgtdiscard++; } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && !IEEE80211_IS_MULTICAST(wh->i_addr1)) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "not for us"); vap->iv_stats.is_rx_mgtdiscard++; } else if (vap->iv_state != IEEE80211_S_RUN) { IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "wrong state %s", ieee80211_state_name[vap->iv_state]); vap->iv_stats.is_rx_mgtdiscard++; } else { if (ieee80211_parse_action(ni, m0) == 0) (void)ic->ic_recv_action(ni, wh, frm, efrm); } break; case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: case IEEE80211_FC0_SUBTYPE_TIMING_ADV: case IEEE80211_FC0_SUBTYPE_ATIM: case IEEE80211_FC0_SUBTYPE_DISASSOC: case IEEE80211_FC0_SUBTYPE_AUTH: case IEEE80211_FC0_SUBTYPE_DEAUTH: IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, NULL, "%s", "not handled"); vap->iv_stats.is_rx_mgtdiscard++; break; default: IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, wh, "mgt", "subtype 0x%x not handled", subtype); vap->iv_stats.is_rx_badsubtype++; break; } } static void mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) { switch (subtype) { case IEEE80211_FC0_SUBTYPE_BAR: ieee80211_recv_bar(ni, m); break; } } /* * Parse meshpeering action ie's for MPM frames */ static const struct ieee80211_meshpeer_ie * mesh_parse_meshpeering_action(struct ieee80211_node *ni, const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ const uint8_t *frm, const uint8_t *efrm, struct ieee80211_meshpeer_ie *mp, uint8_t subtype) { struct ieee80211vap *vap = ni->ni_vap; const struct ieee80211_meshpeer_ie *mpie; uint16_t args[3]; const uint8_t *meshid, *meshconf; uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */ meshid = meshconf = NULL; while (efrm - frm > 1) { IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); switch (*frm) { case IEEE80211_ELEMID_MESHID: meshid = frm; break; case IEEE80211_ELEMID_MESHCONF: meshconf = frm; break; case IEEE80211_ELEMID_MESHPEER: mpie = (const struct ieee80211_meshpeer_ie *) frm; memset(mp, 0, sizeof(*mp)); mp->peer_len = mpie->peer_len; mp->peer_proto = le16dec(&mpie->peer_proto); mp->peer_llinkid = le16dec(&mpie->peer_llinkid); switch (subtype) { case IEEE80211_ACTION_MESHPEERING_CONFIRM: mp->peer_linkid = le16dec(&mpie->peer_linkid); break; case IEEE80211_ACTION_MESHPEERING_CLOSE: /* NB: peer link ID is optional */ if (mpie->peer_len == (IEEE80211_MPM_BASE_SZ + 2)) { mp->peer_linkid = 0; mp->peer_rcode = le16dec(&mpie->peer_linkid); } else { mp->peer_linkid = le16dec(&mpie->peer_linkid); mp->peer_rcode = le16dec(&mpie->peer_rcode); } break; } break; } frm += frm[1] + 2; } /* * Verify the contents of the frame. * If it fails validation, close the peer link. */ if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) { sendclose = 1; IEEE80211_DISCARD(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, wh, NULL, "%s", "MPM validation failed"); } /* If meshid is not the same reject any frames type. */ if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) { sendclose = 1; IEEE80211_DISCARD(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, wh, NULL, "%s", "not for our mesh"); if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) { /* * Standard not clear about this, if we dont ignore * there will be an endless loop between nodes sending * CLOSE frames between each other with wrong meshid. * Discard and timers will bring FSM to IDLE state. */ return NULL; } } /* * Close frames are accepted if meshid is the same. * Verify the other two types. */ if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE && mesh_verify_meshconf(vap, meshconf)) { sendclose = 1; IEEE80211_DISCARD(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, wh, NULL, "%s", "configuration missmatch"); } if (sendclose) { vap->iv_stats.is_rx_mgtdiscard++; switch (ni->ni_mlstate) { case IEEE80211_NODE_MESH_IDLE: case IEEE80211_NODE_MESH_ESTABLISHED: case IEEE80211_NODE_MESH_HOLDING: /* ignore */ break; case IEEE80211_NODE_MESH_OPENSNT: case IEEE80211_NODE_MESH_OPENRCV: case IEEE80211_NODE_MESH_CONFIRMRCV: args[0] = ni->ni_mlpid; args[1] = ni->ni_mllid; /* Reason codes for rejection */ switch (subtype) { case IEEE80211_ACTION_MESHPEERING_OPEN: args[2] = IEEE80211_REASON_MESH_CPVIOLATION; break; case IEEE80211_ACTION_MESHPEERING_CONFIRM: args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS; break; } ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CLOSE, args); mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); mesh_peer_timeout_setup(ni); break; } return NULL; } return (const struct ieee80211_meshpeer_ie *) mp; } static int mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, const struct ieee80211_frame *wh, const uint8_t *frm, const uint8_t *efrm) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_meshpeer_ie ie; const struct ieee80211_meshpeer_ie *meshpeer; uint16_t args[3]; /* +2+2 for action + code + capabilites */ meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie, IEEE80211_ACTION_MESHPEERING_OPEN); if (meshpeer == NULL) { return 0; } /* XXX move up */ IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); switch (ni->ni_mlstate) { case IEEE80211_NODE_MESH_IDLE: /* Reject open request if reached our maximum neighbor count */ if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) { args[0] = meshpeer->peer_llinkid; args[1] = 0; args[2] = IEEE80211_REASON_MESH_MAX_PEERS; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CLOSE, args); /* stay in IDLE state */ return (0); } /* Open frame accepted */ mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); ni->ni_mllid = meshpeer->peer_llinkid; ni->ni_mlpid = mesh_generateid(vap); if (ni->ni_mlpid == 0) return 0; /* XXX */ args[0] = ni->ni_mlpid; /* Announce we're open too... */ ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_OPEN, args); /* ...and confirm the link. */ args[0] = ni->ni_mlpid; args[1] = ni->ni_mllid; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CONFIRM, args); mesh_peer_timeout_setup(ni); break; case IEEE80211_NODE_MESH_OPENRCV: /* Wrong Link ID */ if (ni->ni_mllid != meshpeer->peer_llinkid) { args[0] = ni->ni_mllid; args[1] = ni->ni_mlpid; args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CLOSE, args); mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); mesh_peer_timeout_setup(ni); break; } /* Duplicate open, confirm again. */ args[0] = ni->ni_mlpid; args[1] = ni->ni_mllid; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CONFIRM, args); break; case IEEE80211_NODE_MESH_OPENSNT: ni->ni_mllid = meshpeer->peer_llinkid; mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); args[0] = ni->ni_mlpid; args[1] = ni->ni_mllid; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CONFIRM, args); /* NB: don't setup/clear any timeout */ break; case IEEE80211_NODE_MESH_CONFIRMRCV: if (ni->ni_mlpid != meshpeer->peer_linkid || ni->ni_mllid != meshpeer->peer_llinkid) { args[0] = ni->ni_mlpid; args[1] = ni->ni_mllid; args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CLOSE, args); mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); mesh_peer_timeout_setup(ni); break; } mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); ni->ni_mllid = meshpeer->peer_llinkid; args[0] = ni->ni_mlpid; args[1] = ni->ni_mllid; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CONFIRM, args); mesh_peer_timeout_stop(ni); break; case IEEE80211_NODE_MESH_ESTABLISHED: if (ni->ni_mllid != meshpeer->peer_llinkid) { args[0] = ni->ni_mllid; args[1] = ni->ni_mlpid; args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CLOSE, args); mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); mesh_peer_timeout_setup(ni); break; } args[0] = ni->ni_mlpid; args[1] = ni->ni_mllid; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CONFIRM, args); break; case IEEE80211_NODE_MESH_HOLDING: args[0] = ni->ni_mlpid; args[1] = meshpeer->peer_llinkid; /* Standard not clear about what the reaason code should be */ args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CLOSE, args); break; } return 0; } static int mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, const struct ieee80211_frame *wh, const uint8_t *frm, const uint8_t *efrm) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211_meshpeer_ie ie; const struct ieee80211_meshpeer_ie *meshpeer; uint16_t args[3]; /* +2+2+2+2 for action + code + capabilites + status code + AID */ meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie, IEEE80211_ACTION_MESHPEERING_CONFIRM); if (meshpeer == NULL) { return 0; } IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", meshpeer->peer_llinkid, meshpeer->peer_linkid); switch (ni->ni_mlstate) { case IEEE80211_NODE_MESH_OPENRCV: mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); mesh_peer_timeout_stop(ni); break; case IEEE80211_NODE_MESH_OPENSNT: mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); mesh_peer_timeout_setup(ni); break; case IEEE80211_NODE_MESH_HOLDING: args[0] = ni->ni_mlpid; args[1] = meshpeer->peer_llinkid; /* Standard not clear about what the reaason code should be */ args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CLOSE, args); break; case IEEE80211_NODE_MESH_CONFIRMRCV: if (ni->ni_mllid != meshpeer->peer_llinkid) { args[0] = ni->ni_mlpid; args[1] = ni->ni_mllid; args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CLOSE, args); mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); mesh_peer_timeout_setup(ni); } break; default: IEEE80211_DISCARD(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, wh, NULL, "received confirm in invalid state %d", ni->ni_mlstate); vap->iv_stats.is_rx_mgtdiscard++; break; } return 0; } static int mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, const struct ieee80211_frame *wh, const uint8_t *frm, const uint8_t *efrm) { struct ieee80211_meshpeer_ie ie; const struct ieee80211_meshpeer_ie *meshpeer; uint16_t args[3]; /* +2 for action + code */ meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie, IEEE80211_ACTION_MESHPEERING_CLOSE); if (meshpeer == NULL) { return 0; } /* * XXX: check reason code, for example we could receive * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt * to peer again. */ IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, "%s", "recv PEER CLOSE"); switch (ni->ni_mlstate) { case IEEE80211_NODE_MESH_IDLE: /* ignore */ break; case IEEE80211_NODE_MESH_OPENRCV: case IEEE80211_NODE_MESH_OPENSNT: case IEEE80211_NODE_MESH_CONFIRMRCV: case IEEE80211_NODE_MESH_ESTABLISHED: args[0] = ni->ni_mlpid; args[1] = ni->ni_mllid; args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CLOSE, args); mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); mesh_peer_timeout_setup(ni); break; case IEEE80211_NODE_MESH_HOLDING: mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); mesh_peer_timeout_stop(ni); break; } return 0; } /* * Link Metric handling. */ static int mesh_recv_action_meshlmetric(struct ieee80211_node *ni, const struct ieee80211_frame *wh, const uint8_t *frm, const uint8_t *efrm) { const struct ieee80211_meshlmetric_ie *ie = (const struct ieee80211_meshlmetric_ie *) (frm+2); /* action + code */ struct ieee80211_meshlmetric_ie lm_rep; if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { lm_rep.lm_flags = 0; lm_rep.lm_metric = mesh_airtime_calc(ni); ieee80211_send_action(ni, IEEE80211_ACTION_CAT_MESH, IEEE80211_ACTION_MESH_LMETRIC, &lm_rep); } /* XXX: else do nothing for now */ return 0; } /* * Parse meshgate action ie's for GANN frames. * Returns -1 if parsing fails, otherwise 0. */ static int mesh_parse_meshgate_action(struct ieee80211_node *ni, const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm) { struct ieee80211vap *vap = ni->ni_vap; const struct ieee80211_meshgann_ie *gannie; while (efrm - frm > 1) { IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1); switch (*frm) { case IEEE80211_ELEMID_MESHGANN: gannie = (const struct ieee80211_meshgann_ie *) frm; memset(ie, 0, sizeof(*ie)); ie->gann_ie = gannie->gann_ie; ie->gann_len = gannie->gann_len; ie->gann_flags = gannie->gann_flags; ie->gann_hopcount = gannie->gann_hopcount; ie->gann_ttl = gannie->gann_ttl; IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr); ie->gann_seq = le32dec(&gannie->gann_seq); ie->gann_interval = le16dec(&gannie->gann_interval); break; } frm += frm[1] + 2; } return 0; } /* * Mesh Gate Announcement handling. */ static int mesh_recv_action_meshgate(struct ieee80211_node *ni, const struct ieee80211_frame *wh, const uint8_t *frm, const uint8_t *efrm) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211_mesh_state *ms = vap->iv_mesh; struct ieee80211_mesh_gate_route *gr, *next; struct ieee80211_mesh_route *rt_gate; struct ieee80211_meshgann_ie pgann; struct ieee80211_meshgann_ie ie; int found = 0; /* +2 for action + code */ if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, NULL, "%s", "GANN parsing failed"); vap->iv_stats.is_rx_mgtdiscard++; return (0); } if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr)) return 0; IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":", ie.gann_seq); if (ms == NULL) return (0); MESH_RT_LOCK(ms); TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr)) continue; if (ie.gann_seq <= gr->gr_lastseq) { IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, NULL, "GANN old seqno %u <= %u", ie.gann_seq, gr->gr_lastseq); MESH_RT_UNLOCK(ms); return (0); } /* corresponding mesh gate found & GANN accepted */ found = 1; break; } if (found == 0) { /* this GANN is from a new mesh Gate add it to known table. */ IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, "stored new GANN information, seq %u.", ie.gann_seq); gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), M_80211_MESH_GT_RT, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr); TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); } gr->gr_lastseq = ie.gann_seq; /* check if we have a path to this gate */ rt_gate = mesh_rt_find_locked(ms, gr->gr_addr); if (rt_gate != NULL && rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) { gr->gr_route = rt_gate; rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE; } MESH_RT_UNLOCK(ms); /* popagate only if decremented ttl >= 1 && forwarding is enabled */ if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) return 0; pgann.gann_flags = ie.gann_flags; /* Reserved */ pgann.gann_hopcount = ie.gann_hopcount + 1; pgann.gann_ttl = ie.gann_ttl - 1; IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr); pgann.gann_seq = ie.gann_seq; pgann.gann_interval = ie.gann_interval; IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, "%s", "propagate GANN"); ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, IEEE80211_ACTION_MESH_GANN, &pgann); return 0; } static int mesh_send_action(struct ieee80211_node *ni, const uint8_t sa[IEEE80211_ADDR_LEN], const uint8_t da[IEEE80211_ADDR_LEN], struct mbuf *m) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; struct ieee80211_bpf_params params; int ret; KASSERT(ni != NULL, ("null node")); if (vap->iv_state == IEEE80211_S_CAC) { IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, "block %s frame in CAC state", "Mesh action"); vap->iv_stats.is_tx_badstate++; ieee80211_free_node(ni); m_freem(m); return EIO; /* XXX */ } M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); if (m == NULL) { ieee80211_free_node(ni); return ENOMEM; } IEEE80211_TX_LOCK(ic); ieee80211_send_setup(ni, m, IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION, IEEE80211_NONQOS_TID, sa, da, sa); m->m_flags |= M_ENCAP; /* mark encapsulated */ memset(¶ms, 0, sizeof(params)); params.ibp_pri = WME_AC_VO; params.ibp_rate0 = ni->ni_txparms->mgmtrate; if (IEEE80211_IS_MULTICAST(da)) params.ibp_try0 = 1; else params.ibp_try0 = ni->ni_txparms->maxretry; params.ibp_power = ni->ni_txpower; IEEE80211_NODE_STAT(ni, tx_mgmt); ret = ieee80211_raw_output(vap, ni, m, ¶ms); IEEE80211_TX_UNLOCK(ic); return (ret); } #define ADDSHORT(frm, v) do { \ frm[0] = (v) & 0xff; \ frm[1] = (v) >> 8; \ frm += 2; \ } while (0) #define ADDWORD(frm, v) do { \ frm[0] = (v) & 0xff; \ frm[1] = ((v) >> 8) & 0xff; \ frm[2] = ((v) >> 16) & 0xff; \ frm[3] = ((v) >> 24) & 0xff; \ frm += 4; \ } while (0) static int mesh_send_action_meshpeering_open(struct ieee80211_node *ni, int category, int action, void *args0) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; uint16_t *args = args0; const struct ieee80211_rateset *rs; struct mbuf *m; uint8_t *frm; IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, "send PEER OPEN action: localid 0x%x", args[0]); IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); ieee80211_ref_node(ni); m = ieee80211_getmgtframe(&frm, ic->ic_headroom + sizeof(struct ieee80211_frame), sizeof(uint16_t) /* action+category */ + sizeof(uint16_t) /* capabilites */ + 2 + IEEE80211_RATE_SIZE + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) + 2 + IEEE80211_MESHID_LEN + sizeof(struct ieee80211_meshconf_ie) + sizeof(struct ieee80211_meshpeer_ie) ); if (m != NULL) { /* * mesh peer open action frame format: * [1] category * [1] action * [2] capabilities * [tlv] rates * [tlv] xrates * [tlv] mesh id * [tlv] mesh conf * [tlv] mesh peer link mgmt */ *frm++ = category; *frm++ = action; ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); rs = ieee80211_get_suprates(ic, ic->ic_curchan); frm = ieee80211_add_rates(frm, rs); frm = ieee80211_add_xrates(frm, rs); frm = ieee80211_add_meshid(frm, vap); frm = ieee80211_add_meshconf(frm, vap); frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN, args[0], 0, 0); m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); } else { vap->iv_stats.is_tx_nobuf++; ieee80211_free_node(ni); return ENOMEM; } } static int mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, int category, int action, void *args0) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; uint16_t *args = args0; const struct ieee80211_rateset *rs; struct mbuf *m; uint8_t *frm; IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", args[0], args[1]); IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); ieee80211_ref_node(ni); m = ieee80211_getmgtframe(&frm, ic->ic_headroom + sizeof(struct ieee80211_frame), sizeof(uint16_t) /* action+category */ + sizeof(uint16_t) /* capabilites */ + sizeof(uint16_t) /* status code */ + sizeof(uint16_t) /* AID */ + 2 + IEEE80211_RATE_SIZE + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) + 2 + IEEE80211_MESHID_LEN + sizeof(struct ieee80211_meshconf_ie) + sizeof(struct ieee80211_meshpeer_ie) ); if (m != NULL) { /* * mesh peer confirm action frame format: * [1] category * [1] action * [2] capabilities * [2] status code * [2] association id (peer ID) * [tlv] rates * [tlv] xrates * [tlv] mesh id * [tlv] mesh conf * [tlv] mesh peer link mgmt */ *frm++ = category; *frm++ = action; ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); ADDSHORT(frm, 0); /* status code */ ADDSHORT(frm, args[1]); /* AID */ rs = ieee80211_get_suprates(ic, ic->ic_curchan); frm = ieee80211_add_rates(frm, rs); frm = ieee80211_add_xrates(frm, rs); frm = ieee80211_add_meshid(frm, vap); frm = ieee80211_add_meshconf(frm, vap); frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_CONFIRM, args[0], args[1], 0); m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); } else { vap->iv_stats.is_tx_nobuf++; ieee80211_free_node(ni); return ENOMEM; } } static int mesh_send_action_meshpeering_close(struct ieee80211_node *ni, int category, int action, void *args0) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; uint16_t *args = args0; struct mbuf *m; uint8_t *frm; IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d (%s)", args[0], args[1], args[2], ieee80211_reason_to_string(args[2])); IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); ieee80211_ref_node(ni); m = ieee80211_getmgtframe(&frm, ic->ic_headroom + sizeof(struct ieee80211_frame), sizeof(uint16_t) /* action+category */ + sizeof(uint16_t) /* reason code */ + 2 + IEEE80211_MESHID_LEN + sizeof(struct ieee80211_meshpeer_ie) ); if (m != NULL) { /* * mesh peer close action frame format: * [1] category * [1] action * [tlv] mesh id * [tlv] mesh peer link mgmt */ *frm++ = category; *frm++ = action; frm = ieee80211_add_meshid(frm, vap); frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_CLOSE, args[0], args[1], args[2]); m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); } else { vap->iv_stats.is_tx_nobuf++; ieee80211_free_node(ni); return ENOMEM; } } static int mesh_send_action_meshlmetric(struct ieee80211_node *ni, int category, int action, void *arg0) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; struct ieee80211_meshlmetric_ie *ie = arg0; struct mbuf *m; uint8_t *frm; if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, "%s", "send LINK METRIC REQUEST action"); } else { IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, "send LINK METRIC REPLY action: metric 0x%x", ie->lm_metric); } IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); ieee80211_ref_node(ni); m = ieee80211_getmgtframe(&frm, ic->ic_headroom + sizeof(struct ieee80211_frame), sizeof(uint16_t) + /* action+category */ sizeof(struct ieee80211_meshlmetric_ie) ); if (m != NULL) { /* * mesh link metric * [1] category * [1] action * [tlv] mesh link metric */ *frm++ = category; *frm++ = action; frm = ieee80211_add_meshlmetric(frm, ie->lm_flags, ie->lm_metric); m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); } else { vap->iv_stats.is_tx_nobuf++; ieee80211_free_node(ni); return ENOMEM; } } static int mesh_send_action_meshgate(struct ieee80211_node *ni, int category, int action, void *arg0) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; struct ieee80211_meshgann_ie *ie = arg0; struct mbuf *m; uint8_t *frm; IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); ieee80211_ref_node(ni); m = ieee80211_getmgtframe(&frm, ic->ic_headroom + sizeof(struct ieee80211_frame), sizeof(uint16_t) + /* action+category */ IEEE80211_MESHGANN_BASE_SZ ); if (m != NULL) { /* * mesh link metric * [1] category * [1] action * [tlv] mesh gate annoucement */ *frm++ = category; *frm++ = action; frm = ieee80211_add_meshgate(frm, ie); m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m); } else { vap->iv_stats.is_tx_nobuf++; ieee80211_free_node(ni); return ENOMEM; } } static void mesh_peer_timeout_setup(struct ieee80211_node *ni) { switch (ni->ni_mlstate) { case IEEE80211_NODE_MESH_HOLDING: ni->ni_mltval = ieee80211_mesh_holdingtimeout; break; case IEEE80211_NODE_MESH_CONFIRMRCV: ni->ni_mltval = ieee80211_mesh_confirmtimeout; break; case IEEE80211_NODE_MESH_IDLE: ni->ni_mltval = 0; break; default: ni->ni_mltval = ieee80211_mesh_retrytimeout; break; } if (ni->ni_mltval) callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb, ni); } /* * Same as above but backoffs timer statisically 50%. */ static void mesh_peer_timeout_backoff(struct ieee80211_node *ni) { uint32_t r; r = arc4random(); ni->ni_mltval += r % ni->ni_mltval; callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb, ni); } static __inline void mesh_peer_timeout_stop(struct ieee80211_node *ni) { callout_drain(&ni->ni_mltimer); } static void mesh_peer_backoff_cb(void *arg) { struct ieee80211_node *ni = (struct ieee80211_node *)arg; /* After backoff timeout, try to peer automatically again. */ ni->ni_mlhcnt = 0; } /* * Mesh Peer Link Management FSM timeout handling. */ static void mesh_peer_timeout_cb(void *arg) { struct ieee80211_node *ni = (struct ieee80211_node *)arg; uint16_t args[3]; IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, ni, "mesh link timeout, state %d, retry counter %d", ni->ni_mlstate, ni->ni_mlrcnt); switch (ni->ni_mlstate) { case IEEE80211_NODE_MESH_IDLE: case IEEE80211_NODE_MESH_ESTABLISHED: break; case IEEE80211_NODE_MESH_OPENSNT: case IEEE80211_NODE_MESH_OPENRCV: if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { args[0] = ni->ni_mlpid; args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CLOSE, args); ni->ni_mlrcnt = 0; mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); mesh_peer_timeout_setup(ni); } else { args[0] = ni->ni_mlpid; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_OPEN, args); ni->ni_mlrcnt++; mesh_peer_timeout_backoff(ni); } break; case IEEE80211_NODE_MESH_CONFIRMRCV: args[0] = ni->ni_mlpid; args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; ieee80211_send_action(ni, IEEE80211_ACTION_CAT_SELF_PROT, IEEE80211_ACTION_MESHPEERING_CLOSE, args); mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); mesh_peer_timeout_setup(ni); break; case IEEE80211_NODE_MESH_HOLDING: ni->ni_mlhcnt++; if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) callout_reset(&ni->ni_mlhtimer, ieee80211_mesh_backofftimeout, mesh_peer_backoff_cb, ni); mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); break; } } static int mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) { struct ieee80211_mesh_state *ms = vap->iv_mesh; if (ie == NULL || ie[1] != ms->ms_idlen) return 1; return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); } /* * Check if we are using the same algorithms for this mesh. */ static int mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) { const struct ieee80211_meshconf_ie *meshconf = (const struct ieee80211_meshconf_ie *) ie; const struct ieee80211_mesh_state *ms = vap->iv_mesh; if (meshconf == NULL) return 1; if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, "unknown path selection algorithm: 0x%x\n", meshconf->conf_pselid); return 1; } if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, "unknown path metric algorithm: 0x%x\n", meshconf->conf_pmetid); return 1; } if (meshconf->conf_ccid != 0) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, "unknown congestion control algorithm: 0x%x\n", meshconf->conf_ccid); return 1; } if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, "unknown sync algorithm: 0x%x\n", meshconf->conf_syncid); return 1; } if (meshconf->conf_authid != 0) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, "unknown auth auth algorithm: 0x%x\n", meshconf->conf_pselid); return 1; } /* Not accepting peers */ if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, "not accepting peers: 0x%x\n", meshconf->conf_cap); return 1; } return 0; } static int mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype, const uint8_t *ie) { const struct ieee80211_meshpeer_ie *meshpeer = (const struct ieee80211_meshpeer_ie *) ie; if (meshpeer == NULL || meshpeer->peer_len < IEEE80211_MPM_BASE_SZ || meshpeer->peer_len > IEEE80211_MPM_MAX_SZ) return 1; if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, "Only MPM protocol is supported (proto: 0x%02X)", meshpeer->peer_proto); return 1; } switch (subtype) { case IEEE80211_ACTION_MESHPEERING_OPEN: if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ) return 1; break; case IEEE80211_ACTION_MESHPEERING_CONFIRM: if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2) return 1; break; case IEEE80211_ACTION_MESHPEERING_CLOSE: if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2) return 1; if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) && meshpeer->peer_linkid != 0) return 1; if (meshpeer->peer_rcode == 0) return 1; break; } return 0; } /* * Add a Mesh ID IE to a frame. */ uint8_t * ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) { struct ieee80211_mesh_state *ms = vap->iv_mesh; KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); *frm++ = IEEE80211_ELEMID_MESHID; *frm++ = ms->ms_idlen; memcpy(frm, ms->ms_id, ms->ms_idlen); return frm + ms->ms_idlen; } /* * Add a Mesh Configuration IE to a frame. * For now just use HWMP routing, Airtime link metric, Null Congestion * Signaling, Null Sync Protocol and Null Authentication. */ uint8_t * ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) { const struct ieee80211_mesh_state *ms = vap->iv_mesh; uint16_t caps; KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); *frm++ = IEEE80211_ELEMID_MESHCONF; *frm++ = IEEE80211_MESH_CONF_SZ; *frm++ = ms->ms_ppath->mpp_ie; /* path selection */ *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */ *frm++ = IEEE80211_MESHCONF_CC_DISABLED; *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF; *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED; /* NB: set the number of neighbors before the rest */ *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ? IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1; if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) *frm |= IEEE80211_MESHCONF_FORM_GATE; frm += 1; caps = 0; if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) caps |= IEEE80211_MESHCONF_CAP_AP; if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) caps |= IEEE80211_MESHCONF_CAP_FWRD; *frm++ = caps; return frm; } /* * Add a Mesh Peer Management IE to a frame. */ uint8_t * ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, uint16_t peerid, uint16_t reason) { KASSERT(localid != 0, ("localid == 0")); *frm++ = IEEE80211_ELEMID_MESHPEER; switch (subtype) { case IEEE80211_ACTION_MESHPEERING_OPEN: *frm++ = IEEE80211_MPM_BASE_SZ; /* length */ ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ ADDSHORT(frm, localid); /* local ID */ break; case IEEE80211_ACTION_MESHPEERING_CONFIRM: KASSERT(peerid != 0, ("sending peer confirm without peer id")); *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ ADDSHORT(frm, localid); /* local ID */ ADDSHORT(frm, peerid); /* peer ID */ break; case IEEE80211_ACTION_MESHPEERING_CLOSE: if (peerid) *frm++ = IEEE80211_MPM_MAX_SZ; /* length */ else *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ ADDSHORT(frm, localid); /* local ID */ if (peerid) ADDSHORT(frm, peerid); /* peer ID */ ADDSHORT(frm, reason); break; } return frm; } /* * Compute an Airtime Link Metric for the link with this node. * * Based on Draft 3.0 spec (11B.10, p.149). */ /* * Max 802.11s overhead. */ #define IEEE80211_MESH_MAXOVERHEAD \ (sizeof(struct ieee80211_qosframe_addr4) \ + sizeof(struct ieee80211_meshcntl_ae10) \ + sizeof(struct llc) \ + IEEE80211_ADDR_LEN \ + IEEE80211_WEP_IVLEN \ + IEEE80211_WEP_KIDLEN \ + IEEE80211_WEP_CRCLEN \ + IEEE80211_WEP_MICLEN \ + IEEE80211_CRC_LEN) uint32_t mesh_airtime_calc(struct ieee80211_node *ni) { #define M_BITS 8 #define S_FACTOR (2 * M_BITS) struct ieee80211com *ic = ni->ni_ic; struct ifnet *ifp = ni->ni_vap->iv_ifp; const static int nbits = 8192 << M_BITS; uint32_t overhead, rate, errrate; uint64_t res; /* Time to transmit a frame */ rate = ni->ni_txrate; overhead = ieee80211_compute_duration(ic->ic_rt, ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; /* Error rate in percentage */ /* XXX assuming small failures are ok */ errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) + ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS) / 100; res = (overhead + (nbits / rate)) * ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); return (uint32_t)(res >> S_FACTOR); #undef M_BITS #undef S_FACTOR } /* * Add a Mesh Link Metric report IE to a frame. */ uint8_t * ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric) { *frm++ = IEEE80211_ELEMID_MESHLINK; *frm++ = 5; *frm++ = flags; ADDWORD(frm, metric); return frm; } /* * Add a Mesh Gate Announcement IE to a frame. */ uint8_t * ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie) { *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */ *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */ *frm++ = ie->gann_flags; *frm++ = ie->gann_hopcount; *frm++ = ie->gann_ttl; IEEE80211_ADDR_COPY(frm, ie->gann_addr); frm += 6; ADDWORD(frm, ie->gann_seq); ADDSHORT(frm, ie->gann_interval); return frm; } #undef ADDSHORT #undef ADDWORD /* * Initialize any mesh-specific node state. */ void ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) { ni->ni_flags |= IEEE80211_NODE_QOS; callout_init(&ni->ni_mltimer, 1); callout_init(&ni->ni_mlhtimer, 1); } /* * Cleanup any mesh-specific node state. */ void ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211_mesh_state *ms = vap->iv_mesh; callout_drain(&ni->ni_mltimer); callout_drain(&ni->ni_mlhtimer); /* NB: short-circuit callbacks after mesh_vdetach */ if (vap->iv_mesh != NULL) ms->ms_ppath->mpp_peerdown(ni); } void ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) { ni->ni_meshidlen = ie[1]; memcpy(ni->ni_meshid, ie + 2, ie[1]); } /* * Setup mesh-specific node state on neighbor discovery. */ void ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, const struct ieee80211_frame *wh, const struct ieee80211_scanparams *sp) { ieee80211_parse_meshid(ni, sp->meshid); } void ieee80211_mesh_update_beacon(struct ieee80211vap *vap, struct ieee80211_beacon_offsets *bo) { KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) { (void)ieee80211_add_meshconf(bo->bo_meshconf, vap); clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF); } } static int mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) { struct ieee80211_mesh_state *ms = vap->iv_mesh; uint8_t tmpmeshid[IEEE80211_NWID_LEN]; struct ieee80211_mesh_route *rt; struct ieee80211req_mesh_route *imr; size_t len, off; uint8_t *p; int error; if (vap->iv_opmode != IEEE80211_M_MBSS) return ENOSYS; error = 0; switch (ireq->i_type) { case IEEE80211_IOC_MESH_ID: ireq->i_len = ms->ms_idlen; memcpy(tmpmeshid, ms->ms_id, ireq->i_len); error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); break; case IEEE80211_IOC_MESH_AP: ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; break; case IEEE80211_IOC_MESH_FWRD: ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; break; case IEEE80211_IOC_MESH_GATE: ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0; break; case IEEE80211_IOC_MESH_TTL: ireq->i_val = ms->ms_ttl; break; case IEEE80211_IOC_MESH_RTCMD: switch (ireq->i_val) { case IEEE80211_MESH_RTCMD_LIST: len = 0; MESH_RT_LOCK(ms); TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { len += sizeof(*imr); } MESH_RT_UNLOCK(ms); if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { ireq->i_len = len; return ENOMEM; } ireq->i_len = len; /* XXX M_WAIT? */ p = IEEE80211_MALLOC(len, M_TEMP, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); if (p == NULL) return ENOMEM; off = 0; MESH_RT_LOCK(ms); TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { if (off >= len) break; imr = (struct ieee80211req_mesh_route *) (p + off); IEEE80211_ADDR_COPY(imr->imr_dest, rt->rt_dest); IEEE80211_ADDR_COPY(imr->imr_nexthop, rt->rt_nexthop); imr->imr_metric = rt->rt_metric; imr->imr_nhops = rt->rt_nhops; imr->imr_lifetime = ieee80211_mesh_rt_update(rt, 0); imr->imr_lastmseq = rt->rt_lastmseq; imr->imr_flags = rt->rt_flags; /* last */ off += sizeof(*imr); } MESH_RT_UNLOCK(ms); error = copyout(p, (uint8_t *)ireq->i_data, ireq->i_len); IEEE80211_FREE(p, M_TEMP); break; case IEEE80211_MESH_RTCMD_FLUSH: case IEEE80211_MESH_RTCMD_ADD: case IEEE80211_MESH_RTCMD_DELETE: return EINVAL; default: return ENOSYS; } break; case IEEE80211_IOC_MESH_PR_METRIC: len = strlen(ms->ms_pmetric->mpm_descr); if (ireq->i_len < len) return EINVAL; ireq->i_len = len; error = copyout(ms->ms_pmetric->mpm_descr, (uint8_t *)ireq->i_data, len); break; case IEEE80211_IOC_MESH_PR_PATH: len = strlen(ms->ms_ppath->mpp_descr); if (ireq->i_len < len) return EINVAL; ireq->i_len = len; error = copyout(ms->ms_ppath->mpp_descr, (uint8_t *)ireq->i_data, len); break; default: return ENOSYS; } return error; } IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); static int mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) { struct ieee80211_mesh_state *ms = vap->iv_mesh; uint8_t tmpmeshid[IEEE80211_NWID_LEN]; uint8_t tmpaddr[IEEE80211_ADDR_LEN]; char tmpproto[IEEE80211_MESH_PROTO_DSZ]; int error; if (vap->iv_opmode != IEEE80211_M_MBSS) return ENOSYS; error = 0; switch (ireq->i_type) { case IEEE80211_IOC_MESH_ID: if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) return EINVAL; error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); if (error != 0) break; memset(ms->ms_id, 0, IEEE80211_NWID_LEN); ms->ms_idlen = ireq->i_len; memcpy(ms->ms_id, tmpmeshid, ireq->i_len); error = ENETRESET; break; case IEEE80211_IOC_MESH_AP: if (ireq->i_val) ms->ms_flags |= IEEE80211_MESHFLAGS_AP; else ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; error = ENETRESET; break; case IEEE80211_IOC_MESH_FWRD: if (ireq->i_val) ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; else ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; mesh_gatemode_setup(vap); break; case IEEE80211_IOC_MESH_GATE: if (ireq->i_val) ms->ms_flags |= IEEE80211_MESHFLAGS_GATE; else ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE; break; case IEEE80211_IOC_MESH_TTL: ms->ms_ttl = (uint8_t) ireq->i_val; break; case IEEE80211_IOC_MESH_RTCMD: switch (ireq->i_val) { case IEEE80211_MESH_RTCMD_LIST: return EINVAL; case IEEE80211_MESH_RTCMD_FLUSH: ieee80211_mesh_rt_flush(vap); break; case IEEE80211_MESH_RTCMD_ADD: error = copyin(ireq->i_data, tmpaddr, IEEE80211_ADDR_LEN); if (error != 0) break; if (IEEE80211_ADDR_EQ(vap->iv_myaddr, tmpaddr) || IEEE80211_ADDR_EQ(broadcastaddr, tmpaddr)) return EINVAL; ieee80211_mesh_discover(vap, tmpaddr, NULL); break; case IEEE80211_MESH_RTCMD_DELETE: error = copyin(ireq->i_data, tmpaddr, IEEE80211_ADDR_LEN); if (error != 0) break; ieee80211_mesh_rt_del(vap, tmpaddr); break; default: return ENOSYS; } break; case IEEE80211_IOC_MESH_PR_METRIC: error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); if (error == 0) { error = mesh_select_proto_metric(vap, tmpproto); if (error == 0) error = ENETRESET; } break; case IEEE80211_IOC_MESH_PR_PATH: error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); if (error == 0) { error = mesh_select_proto_path(vap, tmpproto); if (error == 0) error = ENETRESET; } break; default: return ENOSYS; } return error; } IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211); diff --git a/sys/net80211/ieee80211_node.c b/sys/net80211/ieee80211_node.c index 64a0164aeb81..5a9677836dbd 100644 --- a/sys/net80211/ieee80211_node.c +++ b/sys/net80211/ieee80211_node.c @@ -1,3106 +1,3107 @@ /*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (c) 2001 Atsushi Onoe * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); #include "opt_wlan.h" #include #include #include #include #include #include #include #include #include #include #include #include #ifdef IEEE80211_SUPPORT_SUPERG #include #endif #ifdef IEEE80211_SUPPORT_TDMA #include #endif #include #include #include #include #include /* * IEEE80211_NODE_HASHSIZE must be a power of 2. */ CTASSERT((IEEE80211_NODE_HASHSIZE & (IEEE80211_NODE_HASHSIZE-1)) == 0); /* * Association id's are managed with a bit vector. */ #define IEEE80211_AID_SET(_vap, b) \ ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] |= \ (1 << (IEEE80211_AID(b) % 32))) #define IEEE80211_AID_CLR(_vap, b) \ ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] &= \ ~(1 << (IEEE80211_AID(b) % 32))) #define IEEE80211_AID_ISSET(_vap, b) \ ((_vap)->iv_aid_bitmap[IEEE80211_AID(b) / 32] & (1 << (IEEE80211_AID(b) % 32))) static int ieee80211_sta_join1(struct ieee80211_node *); static struct ieee80211_node *node_alloc(struct ieee80211vap *, const uint8_t [IEEE80211_ADDR_LEN]); static int node_init(struct ieee80211_node *); static void node_cleanup(struct ieee80211_node *); static void node_free(struct ieee80211_node *); static void node_age(struct ieee80211_node *); static int8_t node_getrssi(const struct ieee80211_node *); static void node_getsignal(const struct ieee80211_node *, int8_t *, int8_t *); static void node_getmimoinfo(const struct ieee80211_node *, struct ieee80211_mimo_info *); static void _ieee80211_free_node(struct ieee80211_node *); static void node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni); static void ieee80211_node_table_init(struct ieee80211com *ic, struct ieee80211_node_table *nt, const char *name, int inact, int keymaxix); static void ieee80211_node_table_reset(struct ieee80211_node_table *, struct ieee80211vap *); static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt); static void ieee80211_vap_erp_timeout(struct ieee80211vap *); MALLOC_DEFINE(M_80211_NODE, "80211node", "802.11 node state"); MALLOC_DEFINE(M_80211_NODE_IE, "80211nodeie", "802.11 node ie"); void ieee80211_node_attach(struct ieee80211com *ic) { /* XXX really want maxlen enforced per-sta */ ieee80211_ageq_init(&ic->ic_stageq, ic->ic_max_keyix * 8, "802.11 staging q"); ieee80211_node_table_init(ic, &ic->ic_sta, "station", IEEE80211_INACT_INIT, ic->ic_max_keyix); callout_init(&ic->ic_inact, 1); callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, ieee80211_node_timeout, ic); ic->ic_node_alloc = node_alloc; ic->ic_node_init = node_init; ic->ic_node_free = node_free; ic->ic_node_cleanup = node_cleanup; ic->ic_node_age = node_age; ic->ic_node_drain = node_age; /* NB: same as age */ ic->ic_node_getrssi = node_getrssi; ic->ic_node_getsignal = node_getsignal; ic->ic_node_getmimoinfo = node_getmimoinfo; /* * Set flags to be propagated to all vap's; * these define default behaviour/configuration. */ ic->ic_flags_ext |= IEEE80211_FEXT_INACT; /* inactivity processing */ } void ieee80211_node_detach(struct ieee80211com *ic) { callout_drain(&ic->ic_inact); ieee80211_node_table_cleanup(&ic->ic_sta); ieee80211_ageq_drain(&ic->ic_stageq); ieee80211_ageq_cleanup(&ic->ic_stageq); } void ieee80211_node_vattach(struct ieee80211vap *vap) { /* NB: driver can override */ vap->iv_max_aid = IEEE80211_AID_DEF; /* default station inactivity timer setings */ vap->iv_inact_init = IEEE80211_INACT_INIT; vap->iv_inact_auth = IEEE80211_INACT_AUTH; vap->iv_inact_run = IEEE80211_INACT_RUN; vap->iv_inact_probe = IEEE80211_INACT_PROBE; IEEE80211_DPRINTF(vap, IEEE80211_MSG_INACT, "%s: init %u auth %u run %u probe %u\n", __func__, vap->iv_inact_init, vap->iv_inact_auth, vap->iv_inact_run, vap->iv_inact_probe); } void ieee80211_node_latevattach(struct ieee80211vap *vap) { if (vap->iv_opmode == IEEE80211_M_HOSTAP) { /* XXX should we allow max aid to be zero? */ if (vap->iv_max_aid < IEEE80211_AID_MIN) { vap->iv_max_aid = IEEE80211_AID_MIN; if_printf(vap->iv_ifp, "WARNING: max aid too small, changed to %d\n", vap->iv_max_aid); } vap->iv_aid_bitmap = (uint32_t *) IEEE80211_MALLOC( howmany(vap->iv_max_aid, 32) * sizeof(uint32_t), M_80211_NODE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); if (vap->iv_aid_bitmap == NULL) { /* XXX no way to recover */ printf("%s: no memory for AID bitmap, max aid %d!\n", __func__, vap->iv_max_aid); vap->iv_max_aid = 0; } } ieee80211_reset_bss(vap); vap->iv_auth = ieee80211_authenticator_get(vap->iv_bss->ni_authmode); } void ieee80211_node_vdetach(struct ieee80211vap *vap) { struct ieee80211com *ic = vap->iv_ic; ieee80211_node_table_reset(&ic->ic_sta, vap); if (vap->iv_bss != NULL) { ieee80211_free_node(vap->iv_bss); vap->iv_bss = NULL; } if (vap->iv_aid_bitmap != NULL) { IEEE80211_FREE(vap->iv_aid_bitmap, M_80211_NODE); vap->iv_aid_bitmap = NULL; } } /* * Port authorize/unauthorize interfaces for use by an authenticator. */ void ieee80211_node_authorize(struct ieee80211_node *ni) { struct ieee80211vap *vap = ni->ni_vap; ni->ni_flags |= IEEE80211_NODE_AUTH; ni->ni_inact_reload = vap->iv_inact_run; ni->ni_inact = ni->ni_inact_reload; IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, "%s: inact_reload %u", __func__, ni->ni_inact_reload); } void ieee80211_node_unauthorize(struct ieee80211_node *ni) { struct ieee80211vap *vap = ni->ni_vap; ni->ni_flags &= ~IEEE80211_NODE_AUTH; ni->ni_inact_reload = vap->iv_inact_auth; if (ni->ni_inact > ni->ni_inact_reload) ni->ni_inact = ni->ni_inact_reload; IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, "%s: inact_reload %u inact %u", __func__, ni->ni_inact_reload, ni->ni_inact); } /* * Fix tx parameters for a node according to ``association state''. */ void ieee80211_node_setuptxparms(struct ieee80211_node *ni) { struct ieee80211vap *vap = ni->ni_vap; enum ieee80211_phymode mode; if (ni->ni_flags & IEEE80211_NODE_VHT) { if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) mode = IEEE80211_MODE_VHT_5GHZ; else mode = IEEE80211_MODE_VHT_2GHZ; } else if (ni->ni_flags & IEEE80211_NODE_HT) { if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan)) mode = IEEE80211_MODE_11NA; else mode = IEEE80211_MODE_11NG; } else { /* legacy rate handling */ if (IEEE80211_IS_CHAN_ST(ni->ni_chan)) mode = IEEE80211_MODE_STURBO_A; else if (IEEE80211_IS_CHAN_HALF(ni->ni_chan)) mode = IEEE80211_MODE_HALF; else if (IEEE80211_IS_CHAN_QUARTER(ni->ni_chan)) mode = IEEE80211_MODE_QUARTER; /* NB: 108A should be handled as 11a */ else if (IEEE80211_IS_CHAN_A(ni->ni_chan)) mode = IEEE80211_MODE_11A; else if (IEEE80211_IS_CHAN_108G(ni->ni_chan) || (ni->ni_flags & IEEE80211_NODE_ERP)) mode = IEEE80211_MODE_11G; else mode = IEEE80211_MODE_11B; } ni->ni_txparms = &vap->iv_txparms[mode]; } /* * Set/change the channel. The rate set is also updated as * to insure a consistent view by drivers. * XXX should be private but hostap needs it to deal with CSA */ void ieee80211_node_set_chan(struct ieee80211_node *ni, struct ieee80211_channel *chan) { struct ieee80211com *ic = ni->ni_ic; struct ieee80211vap *vap = ni->ni_vap; enum ieee80211_phymode mode; KASSERT(chan != IEEE80211_CHAN_ANYC, ("no channel")); ni->ni_chan = chan; mode = ieee80211_chan2mode(chan); if (IEEE80211_IS_CHAN_HT(chan)) { /* * We must install the legacy rate est in ni_rates and the * HT rate set in ni_htrates. */ ni->ni_htrates = *ieee80211_get_suphtrates(ic, chan); /* * Setup bss tx parameters based on operating mode. We * use legacy rates when operating in a mixed HT+non-HT bss * and non-ERP rates in 11g for mixed ERP+non-ERP bss. */ if (mode == IEEE80211_MODE_11NA && (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) mode = IEEE80211_MODE_11A; else if (mode == IEEE80211_MODE_11NG && (vap->iv_flags_ht & IEEE80211_FHT_PUREN) == 0) mode = IEEE80211_MODE_11G; if (mode == IEEE80211_MODE_11G && (vap->iv_flags & IEEE80211_F_PUREG) == 0) mode = IEEE80211_MODE_11B; } ni->ni_txparms = &vap->iv_txparms[mode]; ni->ni_rates = *ieee80211_get_suprates(ic, chan); } static __inline void copy_bss(struct ieee80211_node *nbss, const struct ieee80211_node *obss) { /* propagate useful state */ nbss->ni_authmode = obss->ni_authmode; nbss->ni_txpower = obss->ni_txpower; nbss->ni_vlan = obss->ni_vlan; /* XXX statistics? */ /* XXX legacy WDS bssid? */ } void ieee80211_create_ibss(struct ieee80211vap* vap, struct ieee80211_channel *chan) { struct ieee80211com *ic = vap->iv_ic; struct ieee80211_node *ni; IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s: creating %s on channel %u%c flags 0x%08x\n", __func__, ieee80211_opmode_name[vap->iv_opmode], ieee80211_chan2ieee(ic, chan), ieee80211_channel_type_char(chan), chan->ic_flags); ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); if (ni == NULL) { /* XXX recovery? */ return; } IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); ni->ni_esslen = vap->iv_des_ssid[0].len; memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); if (vap->iv_bss != NULL) copy_bss(ni, vap->iv_bss); ni->ni_intval = ic->ic_bintval; if (vap->iv_flags & IEEE80211_F_PRIVACY) ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY; if (ic->ic_phytype == IEEE80211_T_FH) { ni->ni_fhdwell = 200; /* XXX */ ni->ni_fhindex = 1; } if (vap->iv_opmode == IEEE80211_M_IBSS) { ni->ni_capinfo |= IEEE80211_CAPINFO_IBSS; /* XXX */ if (vap->iv_flags & IEEE80211_F_DESBSSID) IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); else { - get_random_bytes(ni->ni_bssid, IEEE80211_ADDR_LEN); + net80211_get_random_bytes(ni->ni_bssid, + IEEE80211_ADDR_LEN); /* clear group bit, add local bit */ ni->ni_bssid[0] = (ni->ni_bssid[0] &~ 0x01) | 0x02; } } else if (vap->iv_opmode == IEEE80211_M_AHDEMO) { if (vap->iv_flags & IEEE80211_F_DESBSSID) IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_des_bssid); else #ifdef IEEE80211_SUPPORT_TDMA if ((vap->iv_caps & IEEE80211_C_TDMA) == 0) #endif memset(ni->ni_bssid, 0, IEEE80211_ADDR_LEN); #ifdef IEEE80211_SUPPORT_MESH } else if (vap->iv_opmode == IEEE80211_M_MBSS) { ni->ni_meshidlen = vap->iv_mesh->ms_idlen; memcpy(ni->ni_meshid, vap->iv_mesh->ms_id, ni->ni_meshidlen); #endif } /* * Fix the channel and related attributes. */ /* clear DFS CAC state on previous channel */ if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && ic->ic_bsschan->ic_freq != chan->ic_freq && IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) ieee80211_dfs_cac_clear(ic, ic->ic_bsschan); ic->ic_bsschan = chan; ieee80211_node_set_chan(ni, chan); ic->ic_curmode = ieee80211_chan2mode(chan); /* * Do mode-specific setup. */ if (IEEE80211_IS_CHAN_FULL(chan)) { if (IEEE80211_IS_CHAN_ANYG(chan)) { /* * Use a mixed 11b/11g basic rate set. */ ieee80211_setbasicrates(&ni->ni_rates, IEEE80211_MODE_11G); if (vap->iv_flags & IEEE80211_F_PUREG) { /* * Also mark OFDM rates basic so 11b * stations do not join (WiFi compliance). */ ieee80211_addbasicrates(&ni->ni_rates, IEEE80211_MODE_11A); } } else if (IEEE80211_IS_CHAN_B(chan)) { /* * Force pure 11b rate set. */ ieee80211_setbasicrates(&ni->ni_rates, IEEE80211_MODE_11B); } } /* XXX TODO: other bits and pieces - eg fast-frames? */ /* If we're an 11n channel then initialise the 11n bits */ if (IEEE80211_IS_CHAN_VHT(ni->ni_chan)) { /* XXX what else? */ ieee80211_ht_node_init(ni); ieee80211_vht_node_init(ni); } else if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) { /* XXX what else? */ ieee80211_ht_node_init(ni); } (void) ieee80211_sta_join1(ieee80211_ref_node(ni)); } /* * Reset bss state on transition to the INIT state. * Clear any stations from the table (they have been * deauth'd) and reset the bss node (clears key, rate * etc. state). */ void ieee80211_reset_bss(struct ieee80211vap *vap) { struct ieee80211com *ic = vap->iv_ic; struct ieee80211_node *ni, *obss; ieee80211_node_table_reset(&ic->ic_sta, vap); /* XXX multi-bss: wrong */ ieee80211_vap_reset_erp(vap); ni = ieee80211_alloc_node(&ic->ic_sta, vap, vap->iv_myaddr); KASSERT(ni != NULL, ("unable to setup initial BSS node")); obss = vap->iv_bss; vap->iv_bss = ieee80211_ref_node(ni); if (obss != NULL) { copy_bss(ni, obss); ni->ni_intval = ic->ic_bintval; ieee80211_free_node(obss); } else IEEE80211_ADDR_COPY(ni->ni_bssid, vap->iv_myaddr); } static int match_ssid(const struct ieee80211_node *ni, int nssid, const struct ieee80211_scan_ssid ssids[]) { int i; for (i = 0; i < nssid; i++) { if (ni->ni_esslen == ssids[i].len && memcmp(ni->ni_essid, ssids[i].ssid, ni->ni_esslen) == 0) return 1; } return 0; } /* * Test a node for suitability/compatibility. */ static int check_bss(struct ieee80211vap *vap, struct ieee80211_node *ni) { struct ieee80211com *ic = ni->ni_ic; uint8_t rate; if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) return 0; if (vap->iv_opmode == IEEE80211_M_IBSS) { if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) return 0; } else { if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) return 0; } if (vap->iv_flags & IEEE80211_F_PRIVACY) { if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) return 0; } else { /* XXX does this mean privacy is supported or required? */ if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) return 0; } rate = ieee80211_fix_rate(ni, &ni->ni_rates, IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); if (rate & IEEE80211_RATE_BASIC) return 0; if (vap->iv_des_nssid != 0 && !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) return 0; if ((vap->iv_flags & IEEE80211_F_DESBSSID) && !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) return 0; return 1; } #ifdef IEEE80211_DEBUG /* * Display node suitability/compatibility. */ static void check_bss_debug(struct ieee80211vap *vap, struct ieee80211_node *ni) { struct ieee80211com *ic = ni->ni_ic; uint8_t rate; int fail; fail = 0; if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan))) fail |= 0x01; if (vap->iv_opmode == IEEE80211_M_IBSS) { if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) fail |= 0x02; } else { if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0) fail |= 0x02; } if (vap->iv_flags & IEEE80211_F_PRIVACY) { if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0) fail |= 0x04; } else { /* XXX does this mean privacy is supported or required? */ if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) fail |= 0x04; } rate = ieee80211_fix_rate(ni, &ni->ni_rates, IEEE80211_F_JOIN | IEEE80211_F_DONEGO | IEEE80211_F_DOFRATE); if (rate & IEEE80211_RATE_BASIC) fail |= 0x08; if (vap->iv_des_nssid != 0 && !match_ssid(ni, vap->iv_des_nssid, vap->iv_des_ssid)) fail |= 0x10; if ((vap->iv_flags & IEEE80211_F_DESBSSID) && !IEEE80211_ADDR_EQ(vap->iv_des_bssid, ni->ni_bssid)) fail |= 0x20; printf(" %c %s", fail ? '-' : '+', ether_sprintf(ni->ni_macaddr)); printf(" %s%c", ether_sprintf(ni->ni_bssid), fail & 0x20 ? '!' : ' '); printf(" %3d%c", ieee80211_chan2ieee(ic, ni->ni_chan), fail & 0x01 ? '!' : ' '); printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2, fail & 0x08 ? '!' : ' '); printf(" %4s%c", (ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" : (ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" : "????", fail & 0x02 ? '!' : ' '); printf(" %3s%c ", (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ? "wep" : "no", fail & 0x04 ? '!' : ' '); ieee80211_print_essid(ni->ni_essid, ni->ni_esslen); printf("%s\n", fail & 0x10 ? "!" : ""); } #endif /* IEEE80211_DEBUG */ int ieee80211_ibss_merge_check(struct ieee80211_node *ni) { struct ieee80211vap *vap = ni->ni_vap; if (ni == vap->iv_bss || IEEE80211_ADDR_EQ(ni->ni_bssid, vap->iv_bss->ni_bssid)) { /* unchanged, nothing to do */ return 0; } if (!check_bss(vap, ni)) { /* capabilities mismatch */ IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, "%s: merge failed, capabilities mismatch\n", __func__); #ifdef IEEE80211_DEBUG if (ieee80211_msg_assoc(vap)) check_bss_debug(vap, ni); #endif vap->iv_stats.is_ibss_capmismatch++; return 0; } return 1; } /* * Check if the given node should populate the node table. * * We need to be in "see all beacons for all ssids" mode in order * to do IBSS merges, however this means we will populate nodes for * /all/ IBSS SSIDs, versus just the one we care about. * * So this check ensures the node can actually belong to our IBSS * configuration. For now it simply checks the SSID. */ int ieee80211_ibss_node_check_new(struct ieee80211_node *ni, const struct ieee80211_scanparams *scan) { struct ieee80211vap *vap = ni->ni_vap; int i; /* * If we have no SSID and no scan SSID, return OK. */ if (vap->iv_des_nssid == 0 && scan->ssid == NULL) goto ok; /* * If we have one of (SSID, scan SSID) then return error. */ if (!! (vap->iv_des_nssid == 0) != !! (scan->ssid == NULL)) goto mismatch; /* * Double-check - we need scan SSID. */ if (scan->ssid == NULL) goto mismatch; /* * Check if the scan SSID matches the SSID list for the VAP. */ for (i = 0; i < vap->iv_des_nssid; i++) { /* Sanity length check */ if (vap->iv_des_ssid[i].len != scan->ssid[1]) continue; /* Note: SSID in the scan entry is the IE format */ if (memcmp(vap->iv_des_ssid[i].ssid, scan->ssid + 2, vap->iv_des_ssid[i].len) == 0) goto ok; } mismatch: return (0); ok: return (1); } /* * Handle 802.11 ad hoc network merge. The * convention, set by the Wireless Ethernet Compatibility Alliance * (WECA), is that an 802.11 station will change its BSSID to match * the "oldest" 802.11 ad hoc network, on the same channel, that * has the station's desired SSID. The "oldest" 802.11 network * sends beacons with the greatest TSF timestamp. * * The caller is assumed to validate TSF's before attempting a merge. * * Return !0 if the BSSID changed, 0 otherwise. */ int ieee80211_ibss_merge(struct ieee80211_node *ni) { #ifdef IEEE80211_DEBUG struct ieee80211vap *vap = ni->ni_vap; #endif if (! ieee80211_ibss_merge_check(ni)) return 0; IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, "%s: new bssid %s: %s preamble, %s slot time%s\n", __func__, ether_sprintf(ni->ni_bssid), vap->iv_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", vap->iv_flags&IEEE80211_F_SHSLOT ? "short" : "long", vap->iv_flags&IEEE80211_F_USEPROT ? ", protection" : "" ); return ieee80211_sta_join1(ieee80211_ref_node(ni)); } /* * Calculate HT channel promotion flags for all vaps. * This assumes ni_chan have been setup for each vap. */ static int gethtadjustflags(struct ieee80211com *ic) { struct ieee80211vap *vap; int flags; flags = 0; /* XXX locking */ TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { if (vap->iv_state < IEEE80211_S_RUN) continue; switch (vap->iv_opmode) { case IEEE80211_M_WDS: case IEEE80211_M_STA: case IEEE80211_M_AHDEMO: case IEEE80211_M_HOSTAP: case IEEE80211_M_IBSS: case IEEE80211_M_MBSS: flags |= ieee80211_htchanflags(vap->iv_bss->ni_chan); break; default: break; } } return flags; } /* * Calculate VHT channel promotion flags for all vaps. * This assumes ni_chan have been setup for each vap. */ static int getvhtadjustflags(struct ieee80211com *ic) { struct ieee80211vap *vap; int flags; flags = 0; /* XXX locking */ TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { if (vap->iv_state < IEEE80211_S_RUN) continue; switch (vap->iv_opmode) { case IEEE80211_M_WDS: case IEEE80211_M_STA: case IEEE80211_M_AHDEMO: case IEEE80211_M_HOSTAP: case IEEE80211_M_IBSS: case IEEE80211_M_MBSS: flags |= ieee80211_vhtchanflags(vap->iv_bss->ni_chan); break; default: break; } } return flags; } /* * Check if the current channel needs to change based on whether * any vap's are using HT20/HT40. This is used to sync the state * of ic_curchan after a channel width change on a running vap. * * Same applies for VHT. */ void ieee80211_sync_curchan(struct ieee80211com *ic) { struct ieee80211_channel *c; c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan, gethtadjustflags(ic)); c = ieee80211_vht_adjust_channel(ic, c, getvhtadjustflags(ic)); if (c != ic->ic_curchan) { ic->ic_curchan = c; ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); IEEE80211_UNLOCK(ic); ic->ic_set_channel(ic); ieee80211_radiotap_chan_change(ic); IEEE80211_LOCK(ic); } } /* * Setup the current channel. The request channel may be * promoted if other vap's are operating with HT20/HT40. */ void ieee80211_setupcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) { if (ic->ic_htcaps & IEEE80211_HTC_HT) { int flags = gethtadjustflags(ic); /* * Check for channel promotion required to support the * set of running vap's. This assumes we are called * after ni_chan is setup for each vap. */ /* XXX VHT? */ /* NB: this assumes IEEE80211_FHT_USEHT40 > IEEE80211_FHT_HT */ if (flags > ieee80211_htchanflags(c)) c = ieee80211_ht_adjust_channel(ic, c, flags); } /* * VHT promotion - this will at least promote to VHT20/40 * based on what HT has done; it may further promote the * channel to VHT80 or above. */ if (ic->ic_vhtcaps != 0) { int flags = getvhtadjustflags(ic); if (flags > ieee80211_vhtchanflags(c)) c = ieee80211_vht_adjust_channel(ic, c, flags); } ic->ic_bsschan = ic->ic_curchan = c; ic->ic_curmode = ieee80211_chan2mode(ic->ic_curchan); ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan); } /* * Change the current channel. The channel change is guaranteed to have * happened before the next state change. */ void ieee80211_setcurchan(struct ieee80211com *ic, struct ieee80211_channel *c) { ieee80211_setupcurchan(ic, c); ieee80211_runtask(ic, &ic->ic_chan_task); } void ieee80211_update_chw(struct ieee80211com *ic) { ieee80211_setupcurchan(ic, ic->ic_curchan); ieee80211_runtask(ic, &ic->ic_chw_task); } /* * Join the specified IBSS/BSS network. The node is assumed to * be passed in with a held reference. */ static int ieee80211_sta_join1(struct ieee80211_node *selbs) { struct ieee80211vap *vap = selbs->ni_vap; struct ieee80211com *ic = selbs->ni_ic; struct ieee80211_node *obss; int canreassoc; /* * Committed to selbs, setup state. */ obss = vap->iv_bss; /* * Check if old+new node have the same address in which * case we can reassociate when operating in sta mode. */ canreassoc = (obss != NULL && vap->iv_state == IEEE80211_S_RUN && IEEE80211_ADDR_EQ(obss->ni_macaddr, selbs->ni_macaddr)); vap->iv_bss = selbs; /* NB: caller assumed to bump refcnt */ if (obss != NULL) { struct ieee80211_node_table *nt = obss->ni_table; copy_bss(selbs, obss); ieee80211_node_decref(obss); /* iv_bss reference */ IEEE80211_NODE_LOCK(nt); node_reclaim(nt, obss); /* station table reference */ IEEE80211_NODE_UNLOCK(nt); obss = NULL; /* NB: guard against later use */ } /* * Delete unusable rates; we've already checked * that the negotiated rate set is acceptable. */ ieee80211_fix_rate(vap->iv_bss, &vap->iv_bss->ni_rates, IEEE80211_F_DODEL | IEEE80211_F_JOIN); ieee80211_setcurchan(ic, selbs->ni_chan); /* * Set the erp state (mostly the slot time) to deal with * the auto-select case; this should be redundant if the * mode is locked. */ ieee80211_vap_reset_erp(vap); ieee80211_wme_initparams(vap); if (vap->iv_opmode == IEEE80211_M_STA) { if (canreassoc) { /* Reassociate */ ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); } else { /* * Act as if we received a DEAUTH frame in case we * are invoked from the RUN state. This will cause * us to try to re-authenticate if we are operating * as a station. */ ieee80211_new_state(vap, IEEE80211_S_AUTH, IEEE80211_FC0_SUBTYPE_DEAUTH); } } else ieee80211_new_state(vap, IEEE80211_S_RUN, -1); return 1; } int ieee80211_sta_join(struct ieee80211vap *vap, struct ieee80211_channel *chan, const struct ieee80211_scan_entry *se) { struct ieee80211com *ic = vap->iv_ic; struct ieee80211_node *ni; int do_ht = 0; ni = ieee80211_alloc_node(&ic->ic_sta, vap, se->se_macaddr); if (ni == NULL) { /* XXX msg */ return 0; } /* * Expand scan state into node's format. * XXX may not need all this stuff */ IEEE80211_ADDR_COPY(ni->ni_bssid, se->se_bssid); ni->ni_esslen = se->se_ssid[1]; memcpy(ni->ni_essid, se->se_ssid+2, ni->ni_esslen); ni->ni_tstamp.tsf = se->se_tstamp.tsf; ni->ni_intval = se->se_intval; ni->ni_capinfo = se->se_capinfo; ni->ni_chan = chan; ni->ni_timoff = se->se_timoff; ni->ni_fhdwell = se->se_fhdwell; ni->ni_fhindex = se->se_fhindex; ni->ni_erp = se->se_erp; IEEE80211_RSSI_LPF(ni->ni_avgrssi, se->se_rssi); ni->ni_noise = se->se_noise; if (vap->iv_opmode == IEEE80211_M_STA) { /* NB: only infrastructure mode requires an associd */ ni->ni_flags |= IEEE80211_NODE_ASSOCID; } if (ieee80211_ies_init(&ni->ni_ies, se->se_ies.data, se->se_ies.len)) { ieee80211_ies_expand(&ni->ni_ies); #ifdef IEEE80211_SUPPORT_SUPERG if (ni->ni_ies.ath_ie != NULL) ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); #endif if (ni->ni_ies.htcap_ie != NULL) ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); if (ni->ni_ies.htinfo_ie != NULL) ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); #ifdef IEEE80211_SUPPORT_MESH if (ni->ni_ies.meshid_ie != NULL) ieee80211_parse_meshid(ni, ni->ni_ies.meshid_ie); #endif #ifdef IEEE80211_SUPPORT_TDMA if (ni->ni_ies.tdma_ie != NULL) ieee80211_parse_tdma(ni, ni->ni_ies.tdma_ie); #endif if (ni->ni_ies.vhtcap_ie != NULL) ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); if (ni->ni_ies.vhtopmode_ie != NULL) ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); /* XXX parse BSSLOAD IE */ /* XXX parse TXPWRENV IE */ /* XXX parse APCHANREP IE */ } vap->iv_dtim_period = se->se_dtimperiod; vap->iv_dtim_count = 0; /* NB: must be after ni_chan is setup */ ieee80211_setup_rates(ni, se->se_rates, se->se_xrates, IEEE80211_F_DOSORT); if (ieee80211_iserp_rateset(&ni->ni_rates)) ni->ni_flags |= IEEE80211_NODE_ERP; /* * Setup HT state for this node if it's available, otherwise * non-STA modes won't pick this state up. * * For IBSS and related modes that don't go through an * association request/response, the only appropriate place * to setup the HT state is here. */ if (ni->ni_ies.htinfo_ie != NULL && ni->ni_ies.htcap_ie != NULL && vap->iv_flags_ht & IEEE80211_FHT_HT) { ieee80211_ht_node_init(ni); ieee80211_ht_updateparams(ni, ni->ni_ies.htcap_ie, ni->ni_ies.htinfo_ie); do_ht = 1; } /* * Setup VHT state for this node if it's available. * Same as the above. * * For now, don't allow 2GHz VHT operation. */ if (ni->ni_ies.vhtopmode_ie != NULL && ni->ni_ies.vhtcap_ie != NULL && vap->iv_flags_vht & IEEE80211_FVHT_VHT) { if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", __func__, ni->ni_macaddr, ":"); } else { ieee80211_vht_node_init(ni); ieee80211_vht_updateparams(ni, ni->ni_ies.vhtcap_ie, ni->ni_ies.vhtopmode_ie); ieee80211_setup_vht_rates(ni, ni->ni_ies.vhtcap_ie, ni->ni_ies.vhtopmode_ie); do_ht = 1; } } /* Finally do the node channel change */ if (do_ht) { ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, ni->ni_ies.htinfo_ie); ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie, IEEE80211_F_JOIN | IEEE80211_F_DOBRS); ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie); } /* XXX else check for ath FF? */ /* XXX QoS? Difficult given that WME config is specific to a master */ ieee80211_node_setuptxparms(ni); ieee80211_ratectl_node_init(ni); return ieee80211_sta_join1(ieee80211_ref_node(ni)); } /* * Leave the specified IBSS/BSS network. The node is assumed to * be passed in with a held reference. */ void ieee80211_sta_leave(struct ieee80211_node *ni) { struct ieee80211com *ic = ni->ni_ic; ic->ic_node_cleanup(ni); ieee80211_notify_node_leave(ni); } /* * Send a deauthenticate frame and drop the station. */ void ieee80211_node_deauth(struct ieee80211_node *ni, int reason) { /* NB: bump the refcnt to be sure temporary nodes are not reclaimed */ ieee80211_ref_node(ni); if (ni->ni_associd != 0) IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, reason); ieee80211_node_leave(ni); ieee80211_free_node(ni); } static struct ieee80211_node * node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) { struct ieee80211_node *ni; ni = (struct ieee80211_node *) IEEE80211_MALLOC(sizeof(struct ieee80211_node), M_80211_NODE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); return ni; } static int node_init(struct ieee80211_node *ni) { return 0; } /* * Initialize an ie blob with the specified data. If previous * data exists re-use the data block. As a side effect we clear * all references to specific ie's; the caller is required to * recalculate them. */ int ieee80211_ies_init(struct ieee80211_ies *ies, const uint8_t *data, int len) { /* NB: assumes data+len are the last fields */ memset(ies, 0, offsetof(struct ieee80211_ies, data)); if (ies->data != NULL && ies->len != len) { /* data size changed */ IEEE80211_FREE(ies->data, M_80211_NODE_IE); ies->data = NULL; } if (ies->data == NULL) { ies->data = (uint8_t *) IEEE80211_MALLOC(len, M_80211_NODE_IE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); if (ies->data == NULL) { ies->len = 0; /* NB: pointers have already been zero'd above */ return 0; } } memcpy(ies->data, data, len); ies->len = len; return 1; } /* * Reclaim storage for an ie blob. */ void ieee80211_ies_cleanup(struct ieee80211_ies *ies) { if (ies->data != NULL) IEEE80211_FREE(ies->data, M_80211_NODE_IE); } /* * Expand an ie blob data contents and to fillin individual * ie pointers. The data blob is assumed to be well-formed; * we don't do any validity checking of ie lengths. */ void ieee80211_ies_expand(struct ieee80211_ies *ies) { uint8_t *ie; int ielen; ie = ies->data; ielen = ies->len; while (ielen > 0) { switch (ie[0]) { case IEEE80211_ELEMID_VENDOR: if (iswpaoui(ie)) ies->wpa_ie = ie; else if (iswmeoui(ie)) ies->wme_ie = ie; #ifdef IEEE80211_SUPPORT_SUPERG else if (isatherosoui(ie)) ies->ath_ie = ie; #endif #ifdef IEEE80211_SUPPORT_TDMA else if (istdmaoui(ie)) ies->tdma_ie = ie; #endif break; case IEEE80211_ELEMID_RSN: ies->rsn_ie = ie; break; case IEEE80211_ELEMID_HTCAP: ies->htcap_ie = ie; break; case IEEE80211_ELEMID_HTINFO: ies->htinfo_ie = ie; break; #ifdef IEEE80211_SUPPORT_MESH case IEEE80211_ELEMID_MESHID: ies->meshid_ie = ie; break; #endif case IEEE80211_ELEMID_VHT_CAP: ies->vhtcap_ie = ie; break; case IEEE80211_ELEMID_VHT_OPMODE: ies->vhtopmode_ie = ie; break; case IEEE80211_ELEMID_VHT_PWR_ENV: ies->vhtpwrenv_ie = ie; break; case IEEE80211_ELEMID_BSSLOAD: ies->bssload_ie = ie; break; case IEEE80211_ELEMID_APCHANREP: ies->apchanrep_ie = ie; break; } ielen -= 2 + ie[1]; ie += 2 + ie[1]; } } /* * Reclaim any resources in a node and reset any critical * state. Typically nodes are free'd immediately after, * but in some cases the storage may be reused so we need * to insure consistent state (should probably fix that). */ static void node_cleanup(struct ieee80211_node *ni) { struct ieee80211vap *vap = ni->ni_vap; struct ieee80211com *ic = ni->ni_ic; int i; /* NB: preserve ni_table */ if (ni->ni_flags & IEEE80211_NODE_PWR_MGT) { if (vap->iv_opmode != IEEE80211_M_STA) vap->iv_ps_sta--; ni->ni_flags &= ~IEEE80211_NODE_PWR_MGT; IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, "power save mode off, %u sta's in ps mode", vap->iv_ps_sta); } /* * Cleanup any VHT and HT-related state. */ if (ni->ni_flags & IEEE80211_NODE_VHT) ieee80211_vht_node_cleanup(ni); if (ni->ni_flags & IEEE80211_NODE_HT) ieee80211_ht_node_cleanup(ni); #ifdef IEEE80211_SUPPORT_SUPERG /* Always do FF node cleanup; for A-MSDU */ ieee80211_ff_node_cleanup(ni); #endif #ifdef IEEE80211_SUPPORT_MESH /* * Cleanup any mesh-related state. */ if (vap->iv_opmode == IEEE80211_M_MBSS) ieee80211_mesh_node_cleanup(ni); #endif /* * Clear any staging queue entries. */ ieee80211_ageq_drain_node(&ic->ic_stageq, ni); /* * Clear AREF flag that marks the authorization refcnt bump * has happened. This is probably not needed as the node * should always be removed from the table so not found but * do it just in case. * Likewise clear the ASSOCID flag as these flags are intended * to be managed in tandem. */ ni->ni_flags &= ~(IEEE80211_NODE_AREF | IEEE80211_NODE_ASSOCID); /* * Drain power save queue and, if needed, clear TIM. */ if (ieee80211_node_psq_drain(ni) != 0 && vap->iv_set_tim != NULL) vap->iv_set_tim(ni, 0); ni->ni_associd = 0; if (ni->ni_challenge != NULL) { IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); ni->ni_challenge = NULL; } /* * Preserve SSID, WPA, and WME ie's so the bss node is * reusable during a re-auth/re-assoc state transition. * If we remove these data they will not be recreated * because they come from a probe-response or beacon frame * which cannot be expected prior to the association-response. * This should not be an issue when operating in other modes * as stations leaving always go through a full state transition * which will rebuild this state. * * XXX does this leave us open to inheriting old state? */ for (i = 0; i < nitems(ni->ni_rxfrag); i++) if (ni->ni_rxfrag[i] != NULL) { m_freem(ni->ni_rxfrag[i]); ni->ni_rxfrag[i] = NULL; } /* * Must be careful here to remove any key map entry w/o a LOR. */ ieee80211_node_delucastkey(ni); } static void node_free(struct ieee80211_node *ni) { struct ieee80211com *ic = ni->ni_ic; ieee80211_ratectl_node_deinit(ni); ic->ic_node_cleanup(ni); ieee80211_ies_cleanup(&ni->ni_ies); ieee80211_psq_cleanup(&ni->ni_psq); IEEE80211_FREE(ni, M_80211_NODE); } static void node_age(struct ieee80211_node *ni) { struct ieee80211vap *vap = ni->ni_vap; /* * Age frames on the power save queue. */ if (ieee80211_node_psq_age(ni) != 0 && ni->ni_psq.psq_len == 0 && vap->iv_set_tim != NULL) vap->iv_set_tim(ni, 0); /* * Age out HT resources (e.g. frames on the * A-MPDU reorder queues). */ if (ni->ni_associd != 0 && (ni->ni_flags & IEEE80211_NODE_HT)) ieee80211_ht_node_age(ni); } static int8_t node_getrssi(const struct ieee80211_node *ni) { uint32_t avgrssi = ni->ni_avgrssi; int32_t rssi; if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) return 0; rssi = IEEE80211_RSSI_GET(avgrssi); return rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; } static void node_getsignal(const struct ieee80211_node *ni, int8_t *rssi, int8_t *noise) { *rssi = node_getrssi(ni); *noise = ni->ni_noise; } static void node_getmimoinfo(const struct ieee80211_node *ni, struct ieee80211_mimo_info *info) { int i; uint32_t avgrssi; int32_t rssi; bzero(info, sizeof(*info)); for (i = 0; i < MIN(IEEE80211_MAX_CHAINS, ni->ni_mimo_chains); i++) { /* Note: for now, just pri20 channel info */ avgrssi = ni->ni_mimo_rssi_ctl[i]; if (avgrssi == IEEE80211_RSSI_DUMMY_MARKER) { info->ch[i].rssi[0] = 0; } else { rssi = IEEE80211_RSSI_GET(avgrssi); info->ch[i].rssi[0] = rssi < 0 ? 0 : rssi > 127 ? 127 : rssi; } info->ch[i].noise[0] = ni->ni_mimo_noise_ctl[i]; } /* XXX ext radios? */ /* XXX EVM? */ } static void ieee80211_add_node_nt(struct ieee80211_node_table *nt, struct ieee80211_node *ni) { struct ieee80211com *ic = nt->nt_ic; int hash; IEEE80211_NODE_LOCK_ASSERT(nt); hash = IEEE80211_NODE_HASH(ic, ni->ni_macaddr); (void) ic; /* XXX IEEE80211_NODE_HASH */ TAILQ_INSERT_TAIL(&nt->nt_node, ni, ni_list); LIST_INSERT_HEAD(&nt->nt_hash[hash], ni, ni_hash); nt->nt_count++; ni->ni_table = nt; } static void ieee80211_del_node_nt(struct ieee80211_node_table *nt, struct ieee80211_node *ni) { IEEE80211_NODE_LOCK_ASSERT(nt); TAILQ_REMOVE(&nt->nt_node, ni, ni_list); LIST_REMOVE(ni, ni_hash); nt->nt_count--; KASSERT(nt->nt_count >= 0, ("nt_count is negative (%d)!\n", nt->nt_count)); ni->ni_table = NULL; } struct ieee80211_node * ieee80211_alloc_node(struct ieee80211_node_table *nt, struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) { struct ieee80211com *ic = nt->nt_ic; struct ieee80211_node *ni; ni = ic->ic_node_alloc(vap, macaddr); if (ni == NULL) { vap->iv_stats.is_rx_nodealloc++; return NULL; } IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, "%s %p<%s> in %s table\n", __func__, ni, ether_sprintf(macaddr), nt->nt_name); IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); ieee80211_node_initref(ni); /* mark referenced */ ni->ni_chan = IEEE80211_CHAN_ANYC; ni->ni_authmode = IEEE80211_AUTH_OPEN; ni->ni_txpower = ic->ic_txpowlimit; /* max power */ ni->ni_txparms = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)]; ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); ni->ni_avgrssi = IEEE80211_RSSI_DUMMY_MARKER; ni->ni_inact_reload = nt->nt_inact_init; ni->ni_inact = ni->ni_inact_reload; ni->ni_ath_defkeyix = 0x7fff; ieee80211_psq_init(&ni->ni_psq, "unknown"); #ifdef IEEE80211_SUPPORT_MESH if (vap->iv_opmode == IEEE80211_M_MBSS) ieee80211_mesh_node_init(vap, ni); #endif IEEE80211_NODE_LOCK(nt); ieee80211_add_node_nt(nt, ni); ni->ni_vap = vap; ni->ni_ic = ic; IEEE80211_NODE_UNLOCK(nt); /* handle failure; free node state */ if (ic->ic_node_init(ni) != 0) { vap->iv_stats.is_rx_nodealloc++; ieee80211_psq_cleanup(&ni->ni_psq); ieee80211_ratectl_node_deinit(ni); _ieee80211_free_node(ni); return NULL; } IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, "%s: inact_reload %u", __func__, ni->ni_inact_reload); return ni; } /* * Craft a temporary node suitable for sending a management frame * to the specified station. We craft only as much state as we * need to do the work since the node will be immediately reclaimed * once the send completes. */ struct ieee80211_node * ieee80211_tmp_node(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) { struct ieee80211com *ic = vap->iv_ic; struct ieee80211_node *ni; ni = ic->ic_node_alloc(vap, macaddr); if (ni != NULL) { struct ieee80211_node *bss = vap->iv_bss; IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, "%s %p<%s>\n", __func__, ni, ether_sprintf(macaddr)); ni->ni_table = NULL; /* NB: pedantic */ ni->ni_ic = ic; /* NB: needed to set channel */ ni->ni_vap = vap; IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr); IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); ieee80211_node_initref(ni); /* mark referenced */ /* NB: required by ieee80211_fix_rate */ ieee80211_node_set_chan(ni, bss->ni_chan); ieee80211_crypto_resetkey(vap, &ni->ni_ucastkey, IEEE80211_KEYIX_NONE); ni->ni_txpower = bss->ni_txpower; /* XXX optimize away */ ieee80211_psq_init(&ni->ni_psq, "unknown"); ieee80211_ratectl_node_init(ni); /* handle failure; free node state */ if (ic->ic_node_init(ni) != 0) { vap->iv_stats.is_rx_nodealloc++; ieee80211_psq_cleanup(&ni->ni_psq); ieee80211_ratectl_node_deinit(ni); _ieee80211_free_node(ni); return NULL; } } else { /* XXX msg */ vap->iv_stats.is_rx_nodealloc++; } return ni; } struct ieee80211_node * ieee80211_dup_bss(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) { struct ieee80211com *ic = vap->iv_ic; struct ieee80211_node *ni; ni = ieee80211_alloc_node(&ic->ic_sta, vap, macaddr); if (ni != NULL) { struct ieee80211_node *bss = vap->iv_bss; /* * Inherit from iv_bss. */ copy_bss(ni, bss); IEEE80211_ADDR_COPY(ni->ni_bssid, bss->ni_bssid); ieee80211_node_set_chan(ni, bss->ni_chan); } return ni; } /* * Create a bss node for a legacy WDS vap. The far end does * not associate so we just create create a new node and * simulate an association. The caller is responsible for * installing the node as the bss node and handling any further * setup work like authorizing the port. */ struct ieee80211_node * ieee80211_node_create_wds(struct ieee80211vap *vap, const uint8_t bssid[IEEE80211_ADDR_LEN], struct ieee80211_channel *chan) { struct ieee80211com *ic = vap->iv_ic; struct ieee80211_node *ni; /* XXX check if node already in sta table? */ ni = ieee80211_alloc_node(&ic->ic_sta, vap, bssid); if (ni != NULL) { ni->ni_wdsvap = vap; IEEE80211_ADDR_COPY(ni->ni_bssid, bssid); /* * Inherit any manually configured settings. */ copy_bss(ni, vap->iv_bss); ieee80211_node_set_chan(ni, chan); /* NB: propagate ssid so available to WPA supplicant */ ni->ni_esslen = vap->iv_des_ssid[0].len; memcpy(ni->ni_essid, vap->iv_des_ssid[0].ssid, ni->ni_esslen); /* NB: no associd for peer */ /* * There are no management frames to use to * discover neighbor capabilities, so blindly * propagate the local configuration. */ if (vap->iv_flags & IEEE80211_F_WME) ni->ni_flags |= IEEE80211_NODE_QOS; #ifdef IEEE80211_SUPPORT_SUPERG if (vap->iv_flags & IEEE80211_F_FF) ni->ni_flags |= IEEE80211_NODE_FF; #endif /* XXX VHT */ if ((ic->ic_htcaps & IEEE80211_HTC_HT) && (vap->iv_flags_ht & IEEE80211_FHT_HT)) { /* * Device is HT-capable and HT is enabled for * the vap; setup HT operation. On return * ni_chan will be adjusted to an HT channel. */ ieee80211_ht_wds_init(ni); if (vap->iv_flags_vht & IEEE80211_FVHT_VHT) { printf("%s: TODO: vht_wds_init\n", __func__); } } else { struct ieee80211_channel *c = ni->ni_chan; /* * Force a legacy channel to be used. */ c = ieee80211_find_channel(ic, c->ic_freq, c->ic_flags &~ IEEE80211_CHAN_HT); KASSERT(c != NULL, ("no legacy channel, %u/%x", ni->ni_chan->ic_freq, ni->ni_chan->ic_flags)); ni->ni_chan = c; } } return ni; } struct ieee80211_node * #ifdef IEEE80211_DEBUG_REFCNT ieee80211_find_node_locked_debug(struct ieee80211_node_table *nt, const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) #else ieee80211_find_node_locked(struct ieee80211_node_table *nt, const uint8_t macaddr[IEEE80211_ADDR_LEN]) #endif { struct ieee80211_node *ni; int hash; IEEE80211_NODE_LOCK_ASSERT(nt); hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { ieee80211_ref_node(ni); /* mark referenced */ #ifdef IEEE80211_DEBUG_REFCNT IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); #endif return ni; } } return NULL; } struct ieee80211_node * #ifdef IEEE80211_DEBUG_REFCNT ieee80211_find_node_debug(struct ieee80211_node_table *nt, const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) #else ieee80211_find_node(struct ieee80211_node_table *nt, const uint8_t macaddr[IEEE80211_ADDR_LEN]) #endif { struct ieee80211_node *ni; IEEE80211_NODE_LOCK(nt); ni = ieee80211_find_node_locked(nt, macaddr); IEEE80211_NODE_UNLOCK(nt); return ni; } struct ieee80211_node * #ifdef IEEE80211_DEBUG_REFCNT ieee80211_find_vap_node_locked_debug(struct ieee80211_node_table *nt, const struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) #else ieee80211_find_vap_node_locked(struct ieee80211_node_table *nt, const struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) #endif { struct ieee80211_node *ni; int hash; IEEE80211_NODE_LOCK_ASSERT(nt); hash = IEEE80211_NODE_HASH(nt->nt_ic, macaddr); LIST_FOREACH(ni, &nt->nt_hash[hash], ni_hash) { if (ni->ni_vap == vap && IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) { ieee80211_ref_node(ni); /* mark referenced */ #ifdef IEEE80211_DEBUG_REFCNT IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); #endif return ni; } } return NULL; } struct ieee80211_node * #ifdef IEEE80211_DEBUG_REFCNT ieee80211_find_vap_node_debug(struct ieee80211_node_table *nt, const struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) #else ieee80211_find_vap_node(struct ieee80211_node_table *nt, const struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) #endif { struct ieee80211_node *ni; IEEE80211_NODE_LOCK(nt); ni = ieee80211_find_vap_node_locked(nt, vap, macaddr); IEEE80211_NODE_UNLOCK(nt); return ni; } /* * Fake up a node; this handles node discovery in adhoc mode. * Note that for the driver's benefit we we treat this like * an association so the driver has an opportunity to setup * it's private state. */ struct ieee80211_node * ieee80211_fakeup_adhoc_node(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) { struct ieee80211_node *ni; IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE | IEEE80211_MSG_ASSOC, "%s: mac<%s>\n", __func__, ether_sprintf(macaddr)); ni = ieee80211_dup_bss(vap, macaddr); if (ni != NULL) { struct ieee80211com *ic = vap->iv_ic; /* XXX no rate negotiation; just dup */ ni->ni_rates = vap->iv_bss->ni_rates; if (ieee80211_iserp_rateset(&ni->ni_rates)) ni->ni_flags |= IEEE80211_NODE_ERP; if (vap->iv_opmode == IEEE80211_M_AHDEMO) { /* * In adhoc demo mode there are no management * frames to use to discover neighbor capabilities, * so blindly propagate the local configuration * so we can do interesting things (e.g. use * WME to disable ACK's). */ /* * XXX TODO: 11n? */ if (vap->iv_flags & IEEE80211_F_WME) ni->ni_flags |= IEEE80211_NODE_QOS; #ifdef IEEE80211_SUPPORT_SUPERG if (vap->iv_flags & IEEE80211_F_FF) ni->ni_flags |= IEEE80211_NODE_FF; #endif } ieee80211_node_setuptxparms(ni); ieee80211_ratectl_node_init(ni); /* * XXX TODO: 11n? At least 20MHz, at least A-MPDU RX, * not A-MPDU TX; not 11n rates, etc. We'll cycle * that after we hear that we can indeed do 11n * (either by a beacon frame or by a probe response.) */ /* * This is the first time we see the node. */ if (ic->ic_newassoc != NULL) ic->ic_newassoc(ni, 1); /* * Kick off a probe request to the given node; * we will then use the probe response to update * 11n/etc configuration state. * * XXX TODO: this isn't guaranteed, and until we get * a probe response, we won't be able to actually * do anything 802.11n related to the node. * So if this does indeed work, maybe we should hold * off on sending responses until we get the probe * response, or just default to some sensible subset * of 802.11n behaviour (eg always allow aggregation * negotiation TO us, but not FROM us, etc) so we * aren't entirely busted. */ if (vap->iv_opmode == IEEE80211_M_IBSS) { ieee80211_send_probereq(ni, /* node */ vap->iv_myaddr, /* SA */ ni->ni_macaddr, /* DA */ vap->iv_bss->ni_bssid, /* BSSID */ vap->iv_bss->ni_essid, vap->iv_bss->ni_esslen); /* SSID */ } /* XXX not right for 802.1x/WPA */ ieee80211_node_authorize(ni); } return ni; } void ieee80211_init_neighbor(struct ieee80211_node *ni, const struct ieee80211_frame *wh, const struct ieee80211_scanparams *sp) { int do_ht_setup = 0, do_vht_setup = 0; ni->ni_esslen = sp->ssid[1]; memcpy(ni->ni_essid, sp->ssid + 2, sp->ssid[1]); IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); memcpy(ni->ni_tstamp.data, sp->tstamp, sizeof(ni->ni_tstamp)); ni->ni_intval = sp->bintval; ni->ni_capinfo = sp->capinfo; ni->ni_chan = ni->ni_ic->ic_curchan; ni->ni_fhdwell = sp->fhdwell; ni->ni_fhindex = sp->fhindex; ni->ni_erp = sp->erp; ni->ni_timoff = sp->timoff; #ifdef IEEE80211_SUPPORT_MESH if (ni->ni_vap->iv_opmode == IEEE80211_M_MBSS) ieee80211_mesh_init_neighbor(ni, wh, sp); #endif if (ieee80211_ies_init(&ni->ni_ies, sp->ies, sp->ies_len)) { ieee80211_ies_expand(&ni->ni_ies); if (ni->ni_ies.wme_ie != NULL) ni->ni_flags |= IEEE80211_NODE_QOS; else ni->ni_flags &= ~IEEE80211_NODE_QOS; #ifdef IEEE80211_SUPPORT_SUPERG if (ni->ni_ies.ath_ie != NULL) ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); #endif if (ni->ni_ies.htcap_ie != NULL) ieee80211_parse_htcap(ni, ni->ni_ies.htcap_ie); if (ni->ni_ies.htinfo_ie != NULL) ieee80211_parse_htinfo(ni, ni->ni_ies.htinfo_ie); if (ni->ni_ies.vhtcap_ie != NULL) ieee80211_parse_vhtcap(ni, ni->ni_ies.vhtcap_ie); if (ni->ni_ies.vhtopmode_ie != NULL) ieee80211_parse_vhtopmode(ni, ni->ni_ies.vhtopmode_ie); if ((ni->ni_ies.htcap_ie != NULL) && (ni->ni_ies.htinfo_ie != NULL) && (ni->ni_vap->iv_flags_ht & IEEE80211_FHT_HT)) { do_ht_setup = 1; } if ((ni->ni_ies.vhtcap_ie != NULL) && (ni->ni_ies.vhtopmode_ie != NULL) && (ni->ni_vap->iv_flags_vht & IEEE80211_FVHT_VHT)) { do_vht_setup = 1; } } /* NB: must be after ni_chan is setup */ ieee80211_setup_rates(ni, sp->rates, sp->xrates, IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | IEEE80211_F_DONEGO | IEEE80211_F_DODEL); /* * If the neighbor is HT compatible, flip that on. */ if (do_ht_setup) { IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, "%s: doing HT setup\n", __func__); ieee80211_ht_node_init(ni); ieee80211_ht_updateparams(ni, ni->ni_ies.htcap_ie, ni->ni_ies.htinfo_ie); if (do_vht_setup) { if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { printf("%s: BSS %6D: 2GHz channel, VHT info; ignoring\n", __func__, ni->ni_macaddr, ":"); } else { ieee80211_vht_node_init(ni); ieee80211_vht_updateparams(ni, ni->ni_ies.vhtcap_ie, ni->ni_ies.vhtopmode_ie); ieee80211_setup_vht_rates(ni, ni->ni_ies.vhtcap_ie, ni->ni_ies.vhtopmode_ie); } } /* * Finally do the channel upgrade/change based * on the HT/VHT configuration. */ ieee80211_ht_updateparams_final(ni, ni->ni_ies.htcap_ie, ni->ni_ies.htinfo_ie); ieee80211_setup_htrates(ni, ni->ni_ies.htcap_ie, IEEE80211_F_JOIN | IEEE80211_F_DOBRS); ieee80211_setup_basic_htrates(ni, ni->ni_ies.htinfo_ie); ieee80211_node_setuptxparms(ni); ieee80211_ratectl_node_init(ni); /* Reassociate; we're now 11n/11ac */ /* * XXX TODO: this is the wrong thing to do - * we're calling it with isnew=1 so the ath(4) * driver reinitialises the rate tables. * This "mostly" works for ath(4), but it won't * be right for firmware devices which allocate * node states. * * So, do we just create a new node and delete * the old one? Or? */ if (ni->ni_ic->ic_newassoc) ni->ni_ic->ic_newassoc(ni, 1); } } /* * Do node discovery in adhoc mode on receipt of a beacon * or probe response frame. Note that for the driver's * benefit we we treat this like an association so the * driver has an opportunity to setup it's private state. */ struct ieee80211_node * ieee80211_add_neighbor(struct ieee80211vap *vap, const struct ieee80211_frame *wh, const struct ieee80211_scanparams *sp) { struct ieee80211_node *ni; IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, "%s: mac<%s>\n", __func__, ether_sprintf(wh->i_addr2)); ni = ieee80211_dup_bss(vap, wh->i_addr2);/* XXX alloc_node? */ if (ni != NULL) { struct ieee80211com *ic = vap->iv_ic; ieee80211_init_neighbor(ni, wh, sp); if (ieee80211_iserp_rateset(&ni->ni_rates)) ni->ni_flags |= IEEE80211_NODE_ERP; ieee80211_node_setuptxparms(ni); ieee80211_ratectl_node_init(ni); if (ic->ic_newassoc != NULL) ic->ic_newassoc(ni, 1); /* XXX not right for 802.1x/WPA */ ieee80211_node_authorize(ni); } return ni; } #define IS_PROBEREQ(wh) \ ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK|IEEE80211_FC0_SUBTYPE_MASK)) \ == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ)) #define IS_BCAST_PROBEREQ(wh) \ (IS_PROBEREQ(wh) && IEEE80211_IS_MULTICAST( \ ((const struct ieee80211_frame *)(wh))->i_addr3)) static __inline struct ieee80211_node * _find_rxnode(struct ieee80211_node_table *nt, const struct ieee80211_frame_min *wh) { if (IS_BCAST_PROBEREQ(wh)) return NULL; /* spam bcast probe req to all vap's */ return ieee80211_find_node_locked(nt, wh->i_addr2); } /* * Locate the node for sender, track state, and then pass the * (referenced) node up to the 802.11 layer for its use. Note * we can return NULL if the sender is not in the table. */ struct ieee80211_node * #ifdef IEEE80211_DEBUG_REFCNT ieee80211_find_rxnode_debug(struct ieee80211com *ic, const struct ieee80211_frame_min *wh, const char *func, int line) #else ieee80211_find_rxnode(struct ieee80211com *ic, const struct ieee80211_frame_min *wh) #endif { struct ieee80211_node_table *nt; struct ieee80211_node *ni; nt = &ic->ic_sta; IEEE80211_NODE_LOCK(nt); ni = _find_rxnode(nt, wh); IEEE80211_NODE_UNLOCK(nt); return ni; } /* * Like ieee80211_find_rxnode but use the supplied h/w * key index as a hint to locate the node in the key * mapping table. If an entry is present at the key * index we return it; otherwise do a normal lookup and * update the mapping table if the station has a unicast * key assigned to it. */ struct ieee80211_node * #ifdef IEEE80211_DEBUG_REFCNT ieee80211_find_rxnode_withkey_debug(struct ieee80211com *ic, const struct ieee80211_frame_min *wh, ieee80211_keyix keyix, const char *func, int line) #else ieee80211_find_rxnode_withkey(struct ieee80211com *ic, const struct ieee80211_frame_min *wh, ieee80211_keyix keyix) #endif { struct ieee80211_node_table *nt; struct ieee80211_node *ni; nt = &ic->ic_sta; IEEE80211_NODE_LOCK(nt); if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) ni = nt->nt_keyixmap[keyix]; else ni = NULL; if (ni == NULL) { ni = _find_rxnode(nt, wh); if (ni != NULL && nt->nt_keyixmap != NULL) { /* * If the station has a unicast key cache slot * assigned update the key->node mapping table. */ keyix = ni->ni_ucastkey.wk_rxkeyix; /* XXX can keyixmap[keyix] != NULL? */ if (keyix < nt->nt_keyixmax && nt->nt_keyixmap[keyix] == NULL) { IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, "%s: add key map entry %p<%s> refcnt %d\n", __func__, ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); nt->nt_keyixmap[keyix] = ieee80211_ref_node(ni); } } } else { if (IS_BCAST_PROBEREQ(wh)) ni = NULL; /* spam bcast probe req to all vap's */ else ieee80211_ref_node(ni); } IEEE80211_NODE_UNLOCK(nt); return ni; } #undef IS_BCAST_PROBEREQ #undef IS_PROBEREQ /* * Return a reference to the appropriate node for sending * a data frame. This handles node discovery in adhoc networks. */ struct ieee80211_node * #ifdef IEEE80211_DEBUG_REFCNT ieee80211_find_txnode_debug(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN], const char *func, int line) #else ieee80211_find_txnode(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN]) #endif { struct ieee80211_node_table *nt = &vap->iv_ic->ic_sta; struct ieee80211_node *ni; /* * The destination address should be in the node table * unless this is a multicast/broadcast frame. We can * also optimize station mode operation, all frames go * to the bss node. */ /* XXX can't hold lock across dup_bss 'cuz of recursive locking */ IEEE80211_NODE_LOCK(nt); if (vap->iv_opmode == IEEE80211_M_STA || vap->iv_opmode == IEEE80211_M_WDS || IEEE80211_IS_MULTICAST(macaddr)) ni = ieee80211_ref_node(vap->iv_bss); else ni = ieee80211_find_node_locked(nt, macaddr); IEEE80211_NODE_UNLOCK(nt); if (ni == NULL) { if (vap->iv_opmode == IEEE80211_M_IBSS || vap->iv_opmode == IEEE80211_M_AHDEMO) { /* * In adhoc mode cons up a node for the destination. * Note that we need an additional reference for the * caller to be consistent with * ieee80211_find_node_locked. */ /* * XXX TODO: this doesn't fake up 11n state; we need * to find another way to get it upgraded. */ ni = ieee80211_fakeup_adhoc_node(vap, macaddr); if (ni != NULL) (void) ieee80211_ref_node(ni); } else { IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, macaddr, "no node, discard frame (%s)", __func__); vap->iv_stats.is_tx_nonode++; } } return ni; } static void _ieee80211_free_node(struct ieee80211_node *ni) { struct ieee80211_node_table *nt = ni->ni_table; /* * NB: careful about referencing the vap as it may be * gone if the last reference was held by a driver. * We know the com will always be present so it's safe * to use ni_ic below to reclaim resources. */ #if 0 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, "%s %p<%s> in %s table\n", __func__, ni, ether_sprintf(ni->ni_macaddr), nt != NULL ? nt->nt_name : ""); #endif if (ni->ni_associd != 0) { struct ieee80211vap *vap = ni->ni_vap; if (vap->iv_aid_bitmap != NULL) IEEE80211_AID_CLR(vap, ni->ni_associd); } if (nt != NULL) ieee80211_del_node_nt(nt, ni); ni->ni_ic->ic_node_free(ni); } /* * Clear any entry in the unicast key mapping table. */ static int node_clear_keyixmap(struct ieee80211_node_table *nt, struct ieee80211_node *ni) { ieee80211_keyix keyix; keyix = ni->ni_ucastkey.wk_rxkeyix; if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax && nt->nt_keyixmap[keyix] == ni) { IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, "%s: %p<%s> clear key map entry %u\n", __func__, ni, ether_sprintf(ni->ni_macaddr), keyix); nt->nt_keyixmap[keyix] = NULL; ieee80211_node_decref(ni); return 1; } return 0; } void #ifdef IEEE80211_DEBUG_REFCNT ieee80211_free_node_debug(struct ieee80211_node *ni, const char *func, int line) #else ieee80211_free_node(struct ieee80211_node *ni) #endif { struct ieee80211_node_table *nt = ni->ni_table; #ifdef IEEE80211_DEBUG_REFCNT IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, "%s (%s:%u) %p<%s> refcnt %d\n", __func__, func, line, ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); #endif if (nt != NULL) { IEEE80211_NODE_LOCK(nt); if (ieee80211_node_dectestref(ni)) { /* * Last reference, reclaim state. */ _ieee80211_free_node(ni); } else if (ieee80211_node_refcnt(ni) == 1) if (node_clear_keyixmap(nt, ni)) _ieee80211_free_node(ni); IEEE80211_NODE_UNLOCK(nt); } else { if (ieee80211_node_dectestref(ni)) _ieee80211_free_node(ni); } } /* * Reclaim a unicast key and clear any key cache state. */ int ieee80211_node_delucastkey(struct ieee80211_node *ni) { struct ieee80211com *ic = ni->ni_ic; struct ieee80211_node_table *nt = &ic->ic_sta; struct ieee80211_node *nikey; ieee80211_keyix keyix; int isowned, status; /* * NB: We must beware of LOR here; deleting the key * can cause the crypto layer to block traffic updates * which can generate a LOR against the node table lock; * grab it here and stash the key index for our use below. * * Must also beware of recursion on the node table lock. * When called from node_cleanup we may already have * the node table lock held. Unfortunately there's no * way to separate out this path so we must do this * conditionally. */ isowned = IEEE80211_NODE_IS_LOCKED(nt); if (!isowned) IEEE80211_NODE_LOCK(nt); nikey = NULL; status = 1; /* NB: success */ if (ni->ni_ucastkey.wk_keyix != IEEE80211_KEYIX_NONE) { keyix = ni->ni_ucastkey.wk_rxkeyix; status = ieee80211_crypto_delkey(ni->ni_vap, &ni->ni_ucastkey); if (nt->nt_keyixmap != NULL && keyix < nt->nt_keyixmax) { nikey = nt->nt_keyixmap[keyix]; nt->nt_keyixmap[keyix] = NULL; } } if (!isowned) IEEE80211_NODE_UNLOCK(nt); if (nikey != NULL) { KASSERT(nikey == ni, ("key map out of sync, ni %p nikey %p", ni, nikey)); IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, "%s: delete key map entry %p<%s> refcnt %d\n", __func__, ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)-1); ieee80211_free_node(ni); } return status; } /* * Reclaim a node. If this is the last reference count then * do the normal free work. Otherwise remove it from the node * table and mark it gone by clearing the back-reference. */ static void node_reclaim(struct ieee80211_node_table *nt, struct ieee80211_node *ni) { IEEE80211_NODE_LOCK_ASSERT(nt); IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_NODE, "%s: remove %p<%s> from %s table, refcnt %d\n", __func__, ni, ether_sprintf(ni->ni_macaddr), nt->nt_name, ieee80211_node_refcnt(ni)-1); /* * Clear any entry in the unicast key mapping table. * We need to do it here so rx lookups don't find it * in the mapping table even if it's not in the hash * table. We cannot depend on the mapping table entry * being cleared because the node may not be free'd. */ (void)node_clear_keyixmap(nt, ni); if (!ieee80211_node_dectestref(ni)) { /* * Other references are present, just remove the * node from the table so it cannot be found. When * the references are dropped storage will be * reclaimed. */ ieee80211_del_node_nt(nt, ni); } else _ieee80211_free_node(ni); } /* * Node table support. */ static void ieee80211_node_table_init(struct ieee80211com *ic, struct ieee80211_node_table *nt, const char *name, int inact, int keyixmax) { nt->nt_ic = ic; IEEE80211_NODE_LOCK_INIT(nt, ic->ic_name); TAILQ_INIT(&nt->nt_node); nt->nt_count = 0; nt->nt_name = name; nt->nt_inact_init = inact; nt->nt_keyixmax = keyixmax; if (nt->nt_keyixmax > 0) { nt->nt_keyixmap = (struct ieee80211_node **) IEEE80211_MALLOC( keyixmax * sizeof(struct ieee80211_node *), M_80211_NODE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); if (nt->nt_keyixmap == NULL) ic_printf(ic, "Cannot allocate key index map with %u entries\n", keyixmax); } else nt->nt_keyixmap = NULL; } static void ieee80211_node_table_reset(struct ieee80211_node_table *nt, struct ieee80211vap *match) { struct ieee80211_node *ni, *next; IEEE80211_NODE_LOCK(nt); TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) { if (match != NULL && ni->ni_vap != match) continue; /* XXX can this happen? if so need's work */ if (ni->ni_associd != 0) { struct ieee80211vap *vap = ni->ni_vap; if (vap->iv_auth->ia_node_leave != NULL) vap->iv_auth->ia_node_leave(ni); if (vap->iv_aid_bitmap != NULL) IEEE80211_AID_CLR(vap, ni->ni_associd); } ni->ni_wdsvap = NULL; /* clear reference */ node_reclaim(nt, ni); } if (match != NULL && match->iv_opmode == IEEE80211_M_WDS) { /* * Make a separate pass to clear references to this vap * held by DWDS entries. They will not be matched above * because ni_vap will point to the ap vap but we still * need to clear ni_wdsvap when the WDS vap is destroyed * and/or reset. */ TAILQ_FOREACH_SAFE(ni, &nt->nt_node, ni_list, next) if (ni->ni_wdsvap == match) ni->ni_wdsvap = NULL; } IEEE80211_NODE_UNLOCK(nt); } static void ieee80211_node_table_cleanup(struct ieee80211_node_table *nt) { ieee80211_node_table_reset(nt, NULL); if (nt->nt_keyixmap != NULL) { #ifdef DIAGNOSTIC /* XXX verify all entries are NULL */ int i; for (i = 0; i < nt->nt_keyixmax; i++) if (nt->nt_keyixmap[i] != NULL) printf("%s: %s[%u] still active\n", __func__, nt->nt_name, i); #endif IEEE80211_FREE(nt->nt_keyixmap, M_80211_NODE); nt->nt_keyixmap = NULL; } IEEE80211_NODE_LOCK_DESTROY(nt); } static void timeout_stations(void *arg __unused, struct ieee80211_node *ni) { struct ieee80211com *ic = ni->ni_ic; struct ieee80211vap *vap = ni->ni_vap; /* * Only process stations when in RUN state. This * insures, for example, that we don't timeout an * inactive station during CAC. Note that CSA state * is actually handled in ieee80211_node_timeout as * it applies to more than timeout processing. */ if (vap->iv_state != IEEE80211_S_RUN) return; /* * Ignore entries for which have yet to receive an * authentication frame. These are transient and * will be reclaimed when the last reference to them * goes away (when frame xmits complete). */ if ((vap->iv_opmode == IEEE80211_M_HOSTAP || vap->iv_opmode == IEEE80211_M_STA) && (ni->ni_flags & IEEE80211_NODE_AREF) == 0) return; /* * Free fragment if not needed anymore * (last fragment older than 1s). * XXX doesn't belong here, move to node_age */ if (ni->ni_rxfrag[0] != NULL && ticks > ni->ni_rxfragstamp + hz) { m_freem(ni->ni_rxfrag[0]); ni->ni_rxfrag[0] = NULL; } if (ni->ni_inact > 0) { ni->ni_inact--; IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, "%s: inact %u inact_reload %u nrates %u", __func__, ni->ni_inact, ni->ni_inact_reload, ni->ni_rates.rs_nrates); } /* * Special case ourself; we may be idle for extended periods * of time and regardless reclaiming our state is wrong. * XXX run ic_node_age */ /* XXX before inact decrement? */ if (ni == vap->iv_bss) return; if (ni->ni_associd != 0 || (vap->iv_opmode == IEEE80211_M_IBSS || vap->iv_opmode == IEEE80211_M_AHDEMO)) { /* * Age/drain resources held by the station. */ ic->ic_node_age(ni); /* * Probe the station before time it out. We * send a null data frame which may not be * universally supported by drivers (need it * for ps-poll support so it should be...). * * XXX don't probe the station unless we've * received a frame from them (and have * some idea of the rates they are capable * of); this will get fixed more properly * soon with better handling of the rate set. */ if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && (0 < ni->ni_inact && ni->ni_inact <= vap->iv_inact_probe) && ni->ni_rates.rs_nrates != 0) { IEEE80211_NOTE(vap, IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, "%s", "probe station due to inactivity"); /* * Grab a reference so the node cannot * be reclaimed before we send the frame. * ieee80211_send_nulldata understands * we've done this and reclaims the * ref for us as needed. */ /* XXX fix this (not required anymore). */ ieee80211_ref_node(ni); /* XXX useless */ ieee80211_send_nulldata(ni); /* XXX stat? */ return; } } if ((vap->iv_flags_ext & IEEE80211_FEXT_INACT) && ni->ni_inact <= 0) { IEEE80211_NOTE(vap, IEEE80211_MSG_INACT | IEEE80211_MSG_NODE, ni, "station timed out due to inactivity " "(refcnt %u)", ieee80211_node_refcnt(ni)); /* * Send a deauthenticate frame and drop the station. * This is somewhat complicated due to reference counts * and locking. At this point a station will typically * have a reference count of 2. ieee80211_node_leave * will do a "free" of the node which will drop the * reference count. But in the meantime a reference * wil be held by the deauth frame. The actual reclaim * of the node will happen either after the tx is * completed or by ieee80211_node_leave. */ if (ni->ni_associd != 0) { IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, IEEE80211_REASON_AUTH_EXPIRE); } ieee80211_node_leave(ni); vap->iv_stats.is_node_timeout++; } } /* * Timeout inactive stations and do related housekeeping. */ static void ieee80211_timeout_stations(struct ieee80211com *ic) { struct ieee80211_node_table *nt = &ic->ic_sta; ieee80211_iterate_nodes(nt, timeout_stations, NULL); } /* * Aggressively reclaim resources. This should be used * only in a critical situation to reclaim mbuf resources. */ void ieee80211_drain(struct ieee80211com *ic) { struct ieee80211_node_table *nt = &ic->ic_sta; struct ieee80211vap *vap; struct ieee80211_node *ni; IEEE80211_NODE_LOCK(nt); TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { /* * Ignore entries for which have yet to receive an * authentication frame. These are transient and * will be reclaimed when the last reference to them * goes away (when frame xmits complete). */ vap = ni->ni_vap; /* * Only process stations when in RUN state. This * insures, for example, that we don't timeout an * inactive station during CAC. Note that CSA state * is actually handled in ieee80211_node_timeout as * it applies to more than timeout processing. */ if (vap->iv_state != IEEE80211_S_RUN) continue; /* XXX can vap be NULL? */ if ((vap->iv_opmode == IEEE80211_M_HOSTAP || vap->iv_opmode == IEEE80211_M_STA) && (ni->ni_flags & IEEE80211_NODE_AREF) == 0) continue; /* * Free fragments. * XXX doesn't belong here, move to node_drain */ if (ni->ni_rxfrag[0] != NULL) { m_freem(ni->ni_rxfrag[0]); ni->ni_rxfrag[0] = NULL; } /* * Drain resources held by the station. */ ic->ic_node_drain(ni); } IEEE80211_NODE_UNLOCK(nt); } /* * Per-ieee80211vap inactivity timer callback. */ static void ieee80211_vap_timeout(struct ieee80211vap *vap) { IEEE80211_LOCK_ASSERT(vap->iv_ic); ieee80211_vap_erp_timeout(vap); ieee80211_ht_timeout(vap); ieee80211_vht_timeout(vap); } /* * Per-ieee80211com inactivity timer callback. */ void ieee80211_node_timeout(void *arg) { struct ieee80211com *ic = arg; struct ieee80211vap *vap; /* * Defer timeout processing if a channel switch is pending. * We typically need to be mute so not doing things that * might generate frames is good to handle in one place. * Suppressing the station timeout processing may extend the * lifetime of inactive stations (by not decrementing their * idle counters) but this should be ok unless the CSA is * active for an unusually long time. */ if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { ieee80211_scan_timeout(ic); ieee80211_timeout_stations(ic); ieee80211_ageq_age(&ic->ic_stageq, IEEE80211_INACT_WAIT); IEEE80211_LOCK(ic); TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) ieee80211_vap_timeout(vap); IEEE80211_UNLOCK(ic); } callout_reset(&ic->ic_inact, IEEE80211_INACT_WAIT*hz, ieee80211_node_timeout, ic); } /* * The same as ieee80211_iterate_nodes(), but for one vap only. */ int ieee80211_iterate_nodes_vap(struct ieee80211_node_table *nt, struct ieee80211vap *vap, ieee80211_iter_func *f, void *arg) { struct ieee80211_node **ni_arr; struct ieee80211_node *ni; size_t size; int count, i; /* * Iterate over the node table and save an array of ref'ed nodes. * * This is separated out from calling the actual node function so that * no LORs will occur. */ IEEE80211_NODE_LOCK(nt); count = nt->nt_count; size = count * sizeof(struct ieee80211_node *); ni_arr = (struct ieee80211_node **) IEEE80211_MALLOC(size, M_80211_NODE, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); if (ni_arr == NULL) { IEEE80211_NODE_UNLOCK(nt); return (ENOMEM); } i = 0; TAILQ_FOREACH(ni, &nt->nt_node, ni_list) { if (vap != NULL && ni->ni_vap != vap) continue; KASSERT(i < count, ("node array overflow (vap %p, i %d, count %d)\n", vap, i, count)); ni_arr[i] = ieee80211_ref_node(ni); i++; } IEEE80211_NODE_UNLOCK(nt); for (i = 0; i < count; i++) { if (ni_arr[i] == NULL) /* end of the list */ break; (*f)(arg, ni_arr[i]); /* ieee80211_free_node() locks by itself */ ieee80211_free_node(ni_arr[i]); } IEEE80211_FREE(ni_arr, M_80211_NODE); return (0); } /* * Just a wrapper, so we don't have to change every ieee80211_iterate_nodes() * reference in the source. */ void ieee80211_iterate_nodes(struct ieee80211_node_table *nt, ieee80211_iter_func *f, void *arg) { /* XXX no way to pass error to the caller. */ (void) ieee80211_iterate_nodes_vap(nt, NULL, f, arg); } void ieee80211_dump_node(struct ieee80211_node_table *nt, struct ieee80211_node *ni) { printf("0x%p: mac %s refcnt %d\n", ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)); printf("\tauthmode %u flags 0x%x\n", ni->ni_authmode, ni->ni_flags); printf("\tassocid 0x%x txpower %u vlan %u\n", ni->ni_associd, ni->ni_txpower, ni->ni_vlan); printf("\ttxseq %u rxseq %u fragno %u rxfragstamp %u\n", ni->ni_txseqs[IEEE80211_NONQOS_TID], ni->ni_rxseqs[IEEE80211_NONQOS_TID] >> IEEE80211_SEQ_SEQ_SHIFT, ni->ni_rxseqs[IEEE80211_NONQOS_TID] & IEEE80211_SEQ_FRAG_MASK, ni->ni_rxfragstamp); printf("\trssi %d noise %d intval %u capinfo 0x%x\n", node_getrssi(ni), ni->ni_noise, ni->ni_intval, ni->ni_capinfo); printf("\tbssid %s essid \"%.*s\" channel %u:0x%x\n", ether_sprintf(ni->ni_bssid), ni->ni_esslen, ni->ni_essid, ni->ni_chan->ic_freq, ni->ni_chan->ic_flags); printf("\tinact %u inact_reload %u txrate %u\n", ni->ni_inact, ni->ni_inact_reload, ni->ni_txrate); printf("\thtcap %x htparam %x htctlchan %u ht2ndchan %u\n", ni->ni_htcap, ni->ni_htparam, ni->ni_htctlchan, ni->ni_ht2ndchan); printf("\thtopmode %x htstbc %x htchw %u\n", ni->ni_htopmode, ni->ni_htstbc, ni->ni_chw); printf("\tvhtcap %x freq1 %d freq2 %d vhtbasicmcs %x\n", ni->ni_vhtcap, (int) ni->ni_vht_chan1, (int) ni->ni_vht_chan2, (int) ni->ni_vht_basicmcs); /* XXX VHT state */ } void ieee80211_dump_nodes(struct ieee80211_node_table *nt) { ieee80211_iterate_nodes(nt, (ieee80211_iter_func *) ieee80211_dump_node, nt); } /* * Iterate over the VAPs and update their ERP beacon IEs. * * Note this must be called from the deferred ERP update task paths. */ void ieee80211_notify_erp_locked(struct ieee80211com *ic) { struct ieee80211vap *vap; IEEE80211_LOCK_ASSERT(ic); TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) if (vap->iv_opmode == IEEE80211_M_HOSTAP) ieee80211_beacon_notify(vap, IEEE80211_BEACON_ERP); } /* * Handle a station joining an 11g network. */ static void ieee80211_node_join_11g(struct ieee80211_node *ni) { struct ieee80211com *ic = ni->ni_ic; struct ieee80211vap *vap = ni->ni_vap; IEEE80211_LOCK_ASSERT(ic); /* * Station isn't capable of short slot time. Bump * the count of long slot time stations and disable * use of short slot time. Note that the actual switch * over to long slot time use may not occur until the * next beacon transmission (per sec. 7.3.1.4 of 11g). */ if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { vap->iv_longslotsta++; IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, "station needs long slot time, count %d", vap->iv_longslotsta); /* * XXX TODO: this may need all VAPs checked! */ if (!IEEE80211_IS_CHAN_108G(ic->ic_bsschan)) { /* * Don't force slot time when switched to turbo * mode as non-ERP stations won't be present; this * need only be done when on the normal G channel. */ ieee80211_vap_set_shortslottime(vap, 0); } } /* * If the new station is not an ERP station * then bump the counter and enable protection * if configured. */ if (!ieee80211_iserp_rateset(&ni->ni_rates)) { vap->iv_nonerpsta++; IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, "station is !ERP, %d non-ERP stations associated", vap->iv_nonerpsta); /* * If station does not support short preamble * then we must enable use of Barker preamble. */ if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE) == 0) { IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, "%s", "station needs long preamble"); vap->iv_flags |= IEEE80211_F_USEBARKER; vap->iv_flags &= ~IEEE80211_F_SHPREAMBLE; ieee80211_vap_update_preamble(vap); } /* * If protection is configured and this is the first * indication we should use protection, enable it. */ if (vap->iv_protmode != IEEE80211_PROT_NONE && vap->iv_nonerpsta == 1 && (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, "%s: enable use of protection\n", __func__); vap->iv_flags |= IEEE80211_F_USEPROT; ieee80211_vap_update_erp_protmode(vap); } } else ni->ni_flags |= IEEE80211_NODE_ERP; } void ieee80211_node_join(struct ieee80211_node *ni, int resp) { struct ieee80211com *ic = ni->ni_ic; struct ieee80211vap *vap = ni->ni_vap; int newassoc; if (ni->ni_associd == 0) { uint16_t aid; KASSERT(vap->iv_aid_bitmap != NULL, ("no aid bitmap")); /* * It would be good to search the bitmap * more efficiently, but this will do for now. */ for (aid = 1; aid < vap->iv_max_aid; aid++) { if (!IEEE80211_AID_ISSET(vap, aid)) break; } if (aid >= vap->iv_max_aid) { IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_TOOMANY); ieee80211_node_leave(ni); return; } ni->ni_associd = aid | 0xc000; ni->ni_jointime = time_uptime; IEEE80211_LOCK(ic); IEEE80211_AID_SET(vap, ni->ni_associd); vap->iv_sta_assoc++; if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) ieee80211_ht_node_join(ni); if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) ieee80211_vht_node_join(ni); if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) ieee80211_node_join_11g(ni); IEEE80211_UNLOCK(ic); newassoc = 1; } else newassoc = 0; /* * XXX VHT - should log VHT channel width, etc */ IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, "station associated at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s%s", IEEE80211_NODE_AID(ni), vap->iv_flags & IEEE80211_F_SHPREAMBLE ? "short" : "long", vap->iv_flags & IEEE80211_F_SHSLOT ? "short" : "long", vap->iv_flags & IEEE80211_F_USEPROT ? ", protection" : "", ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", /* XXX update for VHT string */ ni->ni_flags & IEEE80211_NODE_HT ? (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", ni->ni_flags & IEEE80211_NODE_AMSDU ? " (+AMSDU)" : "", ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? ", fast-frames" : "", IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? ", turbo" : "" ); ieee80211_node_setuptxparms(ni); ieee80211_ratectl_node_init(ni); /* give driver a chance to setup state like ni_txrate */ if (ic->ic_newassoc != NULL) ic->ic_newassoc(ni, newassoc); IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_SUCCESS); /* tell the authenticator about new station */ if (vap->iv_auth->ia_node_join != NULL) vap->iv_auth->ia_node_join(ni); ieee80211_notify_node_join(ni, resp == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); } static void disable_protection(struct ieee80211vap *vap) { struct ieee80211com *ic = vap->iv_ic; KASSERT(vap->iv_nonerpsta == 0 && (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0, ("%d non ERP stations, flags 0x%x", vap->iv_nonerpsta, vap->iv_flags_ext)); vap->iv_flags &= ~IEEE80211_F_USEPROT; /* XXX verify mode? */ if (ic->ic_caps & IEEE80211_C_SHPREAMBLE) { vap->iv_flags |= IEEE80211_F_SHPREAMBLE; vap->iv_flags &= ~IEEE80211_F_USEBARKER; } ieee80211_vap_update_erp_protmode(vap); ieee80211_vap_update_preamble(vap); } /* * Handle a station leaving an 11g network. */ static void ieee80211_node_leave_11g(struct ieee80211_node *ni) { struct ieee80211com *ic = ni->ni_ic; struct ieee80211vap *vap = ni->ni_vap; IEEE80211_LOCK_ASSERT(ic); KASSERT(IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan), ("not in 11g, bss %u:0x%x", ic->ic_bsschan->ic_freq, ic->ic_bsschan->ic_flags)); /* * If a long slot station do the slot time bookkeeping. */ if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) == 0) { KASSERT(vap->iv_longslotsta > 0, ("bogus long slot station count %d", vap->iv_longslotsta)); vap->iv_longslotsta--; IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, "long slot time station leaves, count now %d", vap->iv_longslotsta); /* * XXX TODO: this may need all VAPs checked! */ if (vap->iv_longslotsta == 0) { /* * Re-enable use of short slot time if supported * and not operating in IBSS mode (per spec). */ if ((ic->ic_caps & IEEE80211_C_SHSLOT) && ic->ic_opmode != IEEE80211_M_IBSS) { IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, "%s: re-enable use of short slot time\n", __func__); ieee80211_vap_set_shortslottime(vap, 1); } } } /* * If a non-ERP station do the protection-related bookkeeping. */ if ((ni->ni_flags & IEEE80211_NODE_ERP) == 0) { KASSERT(vap->iv_nonerpsta > 0, ("bogus non-ERP station count %d", vap->iv_nonerpsta)); vap->iv_nonerpsta--; IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ASSOC, ni, "non-ERP station leaves, count now %d%s", vap->iv_nonerpsta, (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) ? " (non-ERP sta present)" : ""); if (vap->iv_nonerpsta == 0 && (vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) == 0) { IEEE80211_DPRINTF(ni->ni_vap, IEEE80211_MSG_ASSOC, "%s: disable use of protection\n", __func__); disable_protection(vap); } } } /* * Time out presence of an overlapping bss with non-ERP * stations. When operating in hostap mode we listen for * beacons from other stations and if we identify a non-ERP * station is present we enable protection. To identify * when all non-ERP stations are gone we time out this * condition. */ static void ieee80211_vap_erp_timeout(struct ieee80211vap *vap) { IEEE80211_LOCK_ASSERT(vap->iv_ic); if ((vap->iv_flags_ext & IEEE80211_FEXT_NONERP_PR) && ieee80211_time_after(ticks, vap->iv_lastnonerp + IEEE80211_NONERP_PRESENT_AGE)) { IEEE80211_DPRINTF(vap, IEEE80211_MSG_ASSOC, "%s", "age out non-ERP sta present on channel"); vap->iv_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; if (vap->iv_nonerpsta == 0) disable_protection(vap); } } /* * Handle bookkeeping for station deauthentication/disassociation * when operating as an ap. */ void ieee80211_node_leave(struct ieee80211_node *ni) { struct ieee80211com *ic = ni->ni_ic; struct ieee80211vap *vap = ni->ni_vap; struct ieee80211_node_table *nt = ni->ni_table; IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, ni, "station with aid %d leaves", IEEE80211_NODE_AID(ni)); KASSERT(vap->iv_opmode != IEEE80211_M_STA, ("unexpected operating mode %u", vap->iv_opmode)); /* * If node wasn't previously associated all * we need to do is reclaim the reference. */ /* XXX ibss mode bypasses 11g and notification */ if (ni->ni_associd == 0) goto done; /* * Tell the authenticator the station is leaving. * Note that we must do this before yanking the * association id as the authenticator uses the * associd to locate it's state block. */ if (vap->iv_auth->ia_node_leave != NULL) vap->iv_auth->ia_node_leave(ni); IEEE80211_LOCK(ic); IEEE80211_AID_CLR(vap, ni->ni_associd); vap->iv_sta_assoc--; if (IEEE80211_IS_CHAN_VHT(ic->ic_bsschan)) ieee80211_vht_node_leave(ni); if (IEEE80211_IS_CHAN_HT(ic->ic_bsschan)) ieee80211_ht_node_leave(ni); if (IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && IEEE80211_IS_CHAN_FULL(ic->ic_bsschan)) ieee80211_node_leave_11g(ni); IEEE80211_UNLOCK(ic); /* * Cleanup station state. In particular clear various * state that might otherwise be reused if the node * is reused before the reference count goes to zero * (and memory is reclaimed). */ ieee80211_sta_leave(ni); done: /* * Remove the node from any table it's recorded in and * drop the caller's reference. Removal from the table * is important to insure the node is not reprocessed * for inactivity. */ if (nt != NULL) { IEEE80211_NODE_LOCK(nt); node_reclaim(nt, ni); IEEE80211_NODE_UNLOCK(nt); } else ieee80211_free_node(ni); } struct rssiinfo { int rssi_samples; uint32_t rssi_total; }; static void get_hostap_rssi(void *arg, struct ieee80211_node *ni) { struct rssiinfo *info = arg; struct ieee80211vap *vap = ni->ni_vap; int8_t rssi; /* only associated stations */ if (ni->ni_associd == 0) return; rssi = vap->iv_ic->ic_node_getrssi(ni); if (rssi != 0) { info->rssi_samples++; info->rssi_total += rssi; } } static void get_adhoc_rssi(void *arg, struct ieee80211_node *ni) { struct rssiinfo *info = arg; struct ieee80211vap *vap = ni->ni_vap; int8_t rssi; /* only neighbors */ /* XXX check bssid */ if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0) return; rssi = vap->iv_ic->ic_node_getrssi(ni); if (rssi != 0) { info->rssi_samples++; info->rssi_total += rssi; } } #ifdef IEEE80211_SUPPORT_MESH static void get_mesh_rssi(void *arg, struct ieee80211_node *ni) { struct rssiinfo *info = arg; struct ieee80211vap *vap = ni->ni_vap; int8_t rssi; /* only neighbors that peered successfully */ if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) return; rssi = vap->iv_ic->ic_node_getrssi(ni); if (rssi != 0) { info->rssi_samples++; info->rssi_total += rssi; } } #endif /* IEEE80211_SUPPORT_MESH */ int8_t ieee80211_getrssi(struct ieee80211vap *vap) { #define NZ(x) ((x) == 0 ? 1 : (x)) struct ieee80211com *ic = vap->iv_ic; struct rssiinfo info; info.rssi_total = 0; info.rssi_samples = 0; switch (vap->iv_opmode) { case IEEE80211_M_IBSS: /* average of all ibss neighbors */ case IEEE80211_M_AHDEMO: /* average of all neighbors */ ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_adhoc_rssi, &info); break; case IEEE80211_M_HOSTAP: /* average of all associated stations */ ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_hostap_rssi, &info); break; #ifdef IEEE80211_SUPPORT_MESH case IEEE80211_M_MBSS: /* average of all mesh neighbors */ ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, get_mesh_rssi, &info); break; #endif case IEEE80211_M_MONITOR: /* XXX */ case IEEE80211_M_STA: /* use stats from associated ap */ default: if (vap->iv_bss != NULL) info.rssi_total = ic->ic_node_getrssi(vap->iv_bss); info.rssi_samples = 1; break; } return info.rssi_total / NZ(info.rssi_samples); #undef NZ } void ieee80211_getsignal(struct ieee80211vap *vap, int8_t *rssi, int8_t *noise) { if (vap->iv_bss == NULL) /* NB: shouldn't happen */ return; vap->iv_ic->ic_node_getsignal(vap->iv_bss, rssi, noise); /* for non-station mode return avg'd rssi accounting */ if (vap->iv_opmode != IEEE80211_M_STA) *rssi = ieee80211_getrssi(vap); }