Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/net80211/ieee80211_input.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
1 /*- 2 * Copyright (c) 2001 Atsushi Onoe 3 * Copyright (c) 2002, 2003 Sam Leffler, Errno Consulting 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * Alternatively, this software may be distributed under the terms of the 18 * GNU General Public License ("GPL") version 2 as published by the Free 19 * Software Foundation. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD: releng/5.2/sys/net80211/ieee80211_input.c 121181 2003-10-17 23:59:11Z sam $"); 35 36 #include "opt_inet.h" 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/mbuf.h> 41 #include <sys/malloc.h> 42 #include <sys/kernel.h> 43 #include <sys/socket.h> 44 #include <sys/sockio.h> 45 #include <sys/endian.h> 46 #include <sys/errno.h> 47 #include <sys/bus.h> 48 #include <sys/proc.h> 49 #include <sys/sysctl.h> 50 51 #include <machine/atomic.h> 52 53 #include <net/if.h> 54 #include <net/if_dl.h> 55 #include <net/if_media.h> 56 #include <net/if_arp.h> 57 #include <net/ethernet.h> 58 #include <net/if_llc.h> 59 60 #include <net80211/ieee80211_var.h> 61 62 #include <net/bpf.h> 63 64 #ifdef INET 65 #include <netinet/in.h> 66 #include <netinet/if_ether.h> 67 #endif 68 69 /* 70 * Process a received frame. The node associated with the sender 71 * should be supplied. If nothing was found in the node table then 72 * the caller is assumed to supply a reference to ic_bss instead. 73 * The RSSI and a timestamp are also supplied. The RSSI data is used 74 * during AP scanning to select a AP to associate with; it can have 75 * any units so long as values have consistent units and higher values 76 * mean ``better signal''. The receive timestamp is currently not used 77 * by the 802.11 layer. 78 */ 79 void 80 ieee80211_input(struct ifnet *ifp, struct mbuf *m, struct ieee80211_node *ni, 81 int rssi, u_int32_t rstamp) 82 { 83 struct ieee80211com *ic = (void *)ifp; 84 struct ieee80211_frame *wh; 85 struct ether_header *eh; 86 struct mbuf *m1; 87 int len; 88 u_int8_t dir, type, subtype; 89 u_int8_t *bssid; 90 u_int16_t rxseq; 91 92 KASSERT(ni != NULL, ("null node")); 93 94 /* trim CRC here so WEP can find its own CRC at the end of packet. */ 95 if (m->m_flags & M_HASFCS) { 96 m_adj(m, -IEEE80211_CRC_LEN); 97 m->m_flags &= ~M_HASFCS; 98 } 99 KASSERT(m->m_pkthdr.len >= sizeof(struct ieee80211_frame_min), 100 ("frame length too short: %u", m->m_pkthdr.len)); 101 102 /* 103 * In monitor mode, send everything directly to bpf. 104 * XXX may want to include the CRC 105 */ 106 if (ic->ic_opmode == IEEE80211_M_MONITOR) 107 goto out; 108 109 wh = mtod(m, struct ieee80211_frame *); 110 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 111 IEEE80211_FC0_VERSION_0) { 112 if (ifp->if_flags & IFF_DEBUG) 113 if_printf(ifp, "receive packet with wrong version: %x\n", 114 wh->i_fc[0]); 115 ieee80211_unref_node(&ni); 116 ic->ic_stats.is_rx_badversion++; 117 goto err; 118 } 119 120 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 121 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 122 /* 123 * NB: We are not yet prepared to handle control frames, 124 * but permitting drivers to send them to us allows 125 * them to go through bpf tapping at the 802.11 layer. 126 */ 127 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 128 /* XXX statistic */ 129 IEEE80211_DPRINTF2(("%s: frame too short, len %u\n", 130 __func__, m->m_pkthdr.len)); 131 ic->ic_stats.is_rx_tooshort++; 132 goto out; /* XXX */ 133 } 134 if (ic->ic_state != IEEE80211_S_SCAN) { 135 switch (ic->ic_opmode) { 136 case IEEE80211_M_STA: 137 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_bssid)) { 138 /* not interested in */ 139 IEEE80211_DPRINTF2(("%s: discard frame from " 140 "bss %s\n", __func__, 141 ether_sprintf(wh->i_addr2))); 142 ic->ic_stats.is_rx_wrongbss++; 143 goto out; 144 } 145 break; 146 case IEEE80211_M_IBSS: 147 case IEEE80211_M_AHDEMO: 148 case IEEE80211_M_HOSTAP: 149 if (dir == IEEE80211_FC1_DIR_NODS) 150 bssid = wh->i_addr3; 151 else 152 bssid = wh->i_addr1; 153 if (!IEEE80211_ADDR_EQ(bssid, ic->ic_bss->ni_bssid) && 154 !IEEE80211_ADDR_EQ(bssid, ifp->if_broadcastaddr)) { 155 /* not interested in */ 156 IEEE80211_DPRINTF2(("%s: discard frame from " 157 "bss %s\n", __func__, 158 ether_sprintf(bssid))); 159 ic->ic_stats.is_rx_wrongbss++; 160 goto out; 161 } 162 break; 163 case IEEE80211_M_MONITOR: 164 goto out; 165 default: 166 /* XXX catch bad values */ 167 break; 168 } 169 ni->ni_rssi = rssi; 170 ni->ni_rstamp = rstamp; 171 rxseq = ni->ni_rxseq; 172 ni->ni_rxseq = 173 le16toh(*(u_int16_t *)wh->i_seq) >> IEEE80211_SEQ_SEQ_SHIFT; 174 /* TODO: fragment */ 175 if ((wh->i_fc[1] & IEEE80211_FC1_RETRY) && 176 rxseq == ni->ni_rxseq) { 177 /* duplicate, silently discarded */ 178 ic->ic_stats.is_rx_dup++; /* XXX per-station stat */ 179 goto out; 180 } 181 ni->ni_inact = 0; 182 } 183 184 switch (type) { 185 case IEEE80211_FC0_TYPE_DATA: 186 switch (ic->ic_opmode) { 187 case IEEE80211_M_STA: 188 if (dir != IEEE80211_FC1_DIR_FROMDS) { 189 ic->ic_stats.is_rx_wrongdir++; 190 goto out; 191 } 192 if ((ifp->if_flags & IFF_SIMPLEX) && 193 IEEE80211_IS_MULTICAST(wh->i_addr1) && 194 IEEE80211_ADDR_EQ(wh->i_addr3, ic->ic_myaddr)) { 195 /* 196 * In IEEE802.11 network, multicast packet 197 * sent from me is broadcasted from AP. 198 * It should be silently discarded for 199 * SIMPLEX interface. 200 */ 201 ic->ic_stats.is_rx_mcastecho++; 202 goto out; 203 } 204 break; 205 case IEEE80211_M_IBSS: 206 case IEEE80211_M_AHDEMO: 207 if (dir != IEEE80211_FC1_DIR_NODS) { 208 ic->ic_stats.is_rx_wrongdir++; 209 goto out; 210 } 211 break; 212 case IEEE80211_M_HOSTAP: 213 if (dir != IEEE80211_FC1_DIR_TODS) { 214 ic->ic_stats.is_rx_wrongdir++; 215 goto out; 216 } 217 /* check if source STA is associated */ 218 if (ni == ic->ic_bss) { 219 IEEE80211_DPRINTF(("%s: data from unknown src " 220 "%s\n", __func__, 221 ether_sprintf(wh->i_addr2))); 222 /* NB: caller deals with reference */ 223 ni = ieee80211_dup_bss(ic, wh->i_addr2); 224 if (ni != NULL) { 225 IEEE80211_SEND_MGMT(ic, ni, 226 IEEE80211_FC0_SUBTYPE_DEAUTH, 227 IEEE80211_REASON_NOT_AUTHED); 228 ieee80211_free_node(ic, ni); 229 } 230 ic->ic_stats.is_rx_notassoc++; 231 goto err; 232 } 233 if (ni->ni_associd == 0) { 234 IEEE80211_DPRINTF(("ieee80211_input: " 235 "data from unassoc src %s\n", 236 ether_sprintf(wh->i_addr2))); 237 IEEE80211_SEND_MGMT(ic, ni, 238 IEEE80211_FC0_SUBTYPE_DISASSOC, 239 IEEE80211_REASON_NOT_ASSOCED); 240 ieee80211_unref_node(&ni); 241 ic->ic_stats.is_rx_notassoc++; 242 goto err; 243 } 244 break; 245 case IEEE80211_M_MONITOR: 246 break; 247 } 248 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 249 if (ic->ic_flags & IEEE80211_F_WEPON) { 250 m = ieee80211_wep_crypt(ifp, m, 0); 251 if (m == NULL) { 252 ic->ic_stats.is_rx_wepfail++; 253 goto err; 254 } 255 wh = mtod(m, struct ieee80211_frame *); 256 } else { 257 ic->ic_stats.is_rx_nowep++; 258 goto out; 259 } 260 } 261 /* copy to listener after decrypt */ 262 if (ic->ic_rawbpf) 263 bpf_mtap(ic->ic_rawbpf, m); 264 m = ieee80211_decap(ifp, m); 265 if (m == NULL) { 266 ic->ic_stats.is_rx_decap++; 267 goto err; 268 } 269 ifp->if_ipackets++; 270 271 /* perform as a bridge within the AP */ 272 m1 = NULL; 273 if (ic->ic_opmode == IEEE80211_M_HOSTAP) { 274 eh = mtod(m, struct ether_header *); 275 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 276 m1 = m_copypacket(m, M_DONTWAIT); 277 if (m1 == NULL) 278 ifp->if_oerrors++; 279 else 280 m1->m_flags |= M_MCAST; 281 } else { 282 ni = ieee80211_find_node(ic, eh->ether_dhost); 283 if (ni != NULL) { 284 if (ni->ni_associd != 0) { 285 m1 = m; 286 m = NULL; 287 } 288 ieee80211_unref_node(&ni); 289 } 290 } 291 if (m1 != NULL) { 292 #ifdef ALTQ 293 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 294 altq_etherclassify(&ifp->if_snd, m1, 295 &pktattr); 296 #endif 297 len = m1->m_pkthdr.len; 298 IF_ENQUEUE(&ifp->if_snd, m1); 299 if (m != NULL) 300 ifp->if_omcasts++; 301 ifp->if_obytes += len; 302 } 303 } 304 if (m != NULL) 305 (*ifp->if_input)(ifp, m); 306 return; 307 308 case IEEE80211_FC0_TYPE_MGT: 309 if (dir != IEEE80211_FC1_DIR_NODS) { 310 ic->ic_stats.is_rx_wrongdir++; 311 goto err; 312 } 313 if (ic->ic_opmode == IEEE80211_M_AHDEMO) { 314 ic->ic_stats.is_rx_ahdemo_mgt++; 315 goto out; 316 } 317 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 318 319 /* drop frames without interest */ 320 if (ic->ic_state == IEEE80211_S_SCAN) { 321 if (subtype != IEEE80211_FC0_SUBTYPE_BEACON && 322 subtype != IEEE80211_FC0_SUBTYPE_PROBE_RESP) { 323 ic->ic_stats.is_rx_mgtdiscard++; 324 goto out; 325 } 326 } else { 327 if (ic->ic_opmode != IEEE80211_M_IBSS && 328 subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 329 ic->ic_stats.is_rx_mgtdiscard++; 330 goto out; 331 } 332 } 333 334 if (ifp->if_flags & IFF_DEBUG) { 335 /* avoid to print too many frames */ 336 int doprint = 0; 337 338 switch (subtype) { 339 case IEEE80211_FC0_SUBTYPE_BEACON: 340 if (ic->ic_state == IEEE80211_S_SCAN) 341 doprint = 1; 342 break; 343 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 344 if (ic->ic_opmode == IEEE80211_M_IBSS) 345 doprint = 1; 346 break; 347 default: 348 doprint = 1; 349 break; 350 } 351 #ifdef IEEE80211_DEBUG 352 doprint += ieee80211_debug; 353 #endif 354 if (doprint) 355 if_printf(ifp, "received %s from %s rssi %d\n", 356 ieee80211_mgt_subtype_name[subtype 357 >> IEEE80211_FC0_SUBTYPE_SHIFT], 358 ether_sprintf(wh->i_addr2), rssi); 359 } 360 if (ic->ic_rawbpf) 361 bpf_mtap(ic->ic_rawbpf, m); 362 (*ic->ic_recv_mgmt)(ic, m, ni, subtype, rssi, rstamp); 363 m_freem(m); 364 return; 365 366 case IEEE80211_FC0_TYPE_CTL: 367 ic->ic_stats.is_rx_ctl++; 368 goto out; 369 default: 370 IEEE80211_DPRINTF(("%s: bad type %x\n", __func__, type)); 371 /* should not come here */ 372 break; 373 } 374 err: 375 ifp->if_ierrors++; 376 out: 377 if (m != NULL) { 378 if (ic->ic_rawbpf) 379 bpf_mtap(ic->ic_rawbpf, m); 380 m_freem(m); 381 } 382 } 383 384 struct mbuf * 385 ieee80211_decap(struct ifnet *ifp, struct mbuf *m) 386 { 387 struct ether_header *eh; 388 struct ieee80211_frame wh; 389 struct llc *llc; 390 391 if (m->m_len < sizeof(wh) + sizeof(*llc)) { 392 m = m_pullup(m, sizeof(wh) + sizeof(*llc)); 393 if (m == NULL) 394 return NULL; 395 } 396 memcpy(&wh, mtod(m, caddr_t), sizeof(wh)); 397 llc = (struct llc *)(mtod(m, caddr_t) + sizeof(wh)); 398 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && 399 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && 400 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0) { 401 m_adj(m, sizeof(wh) + sizeof(struct llc) - sizeof(*eh)); 402 llc = NULL; 403 } else { 404 m_adj(m, sizeof(wh) - sizeof(*eh)); 405 } 406 eh = mtod(m, struct ether_header *); 407 switch (wh.i_fc[1] & IEEE80211_FC1_DIR_MASK) { 408 case IEEE80211_FC1_DIR_NODS: 409 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr1); 410 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr2); 411 break; 412 case IEEE80211_FC1_DIR_TODS: 413 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr3); 414 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr2); 415 break; 416 case IEEE80211_FC1_DIR_FROMDS: 417 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr1); 418 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr3); 419 break; 420 case IEEE80211_FC1_DIR_DSTODS: 421 /* not yet supported */ 422 IEEE80211_DPRINTF(("%s: DS to DS\n", __func__)); 423 m_freem(m); 424 return NULL; 425 } 426 #ifdef ALIGNED_POINTER 427 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), u_int32_t)) { 428 struct mbuf *n, *n0, **np; 429 caddr_t newdata; 430 int off, pktlen; 431 432 n0 = NULL; 433 np = &n0; 434 off = 0; 435 pktlen = m->m_pkthdr.len; 436 while (pktlen > off) { 437 if (n0 == NULL) { 438 MGETHDR(n, M_DONTWAIT, MT_DATA); 439 if (n == NULL) { 440 m_freem(m); 441 return NULL; 442 } 443 M_MOVE_PKTHDR(n, m); 444 n->m_len = MHLEN; 445 } else { 446 MGET(n, M_DONTWAIT, MT_DATA); 447 if (n == NULL) { 448 m_freem(m); 449 m_freem(n0); 450 return NULL; 451 } 452 n->m_len = MLEN; 453 } 454 if (pktlen - off >= MINCLSIZE) { 455 MCLGET(n, M_DONTWAIT); 456 if (n->m_flags & M_EXT) 457 n->m_len = n->m_ext.ext_size; 458 } 459 if (n0 == NULL) { 460 newdata = 461 (caddr_t)ALIGN(n->m_data + sizeof(*eh)) - 462 sizeof(*eh); 463 n->m_len -= newdata - n->m_data; 464 n->m_data = newdata; 465 } 466 if (n->m_len > pktlen - off) 467 n->m_len = pktlen - off; 468 m_copydata(m, off, n->m_len, mtod(n, caddr_t)); 469 off += n->m_len; 470 *np = n; 471 np = &n->m_next; 472 } 473 m_freem(m); 474 m = n0; 475 } 476 #endif /* ALIGNED_POINTER */ 477 if (llc != NULL) { 478 eh = mtod(m, struct ether_header *); 479 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); 480 } 481 return m; 482 } 483 484 /* 485 * Install received rate set information in the node's state block. 486 */ 487 static int 488 ieee80211_setup_rates(struct ieee80211com *ic, struct ieee80211_node *ni, 489 u_int8_t *rates, u_int8_t *xrates, int flags) 490 { 491 struct ieee80211_rateset *rs = &ni->ni_rates; 492 493 memset(rs, 0, sizeof(*rs)); 494 rs->rs_nrates = rates[1]; 495 memcpy(rs->rs_rates, rates + 2, rs->rs_nrates); 496 if (xrates != NULL) { 497 u_int8_t nxrates; 498 /* 499 * Tack on 11g extended supported rate element. 500 */ 501 nxrates = xrates[1]; 502 if (rs->rs_nrates + nxrates > IEEE80211_RATE_MAXSIZE) { 503 nxrates = IEEE80211_RATE_MAXSIZE - rs->rs_nrates; 504 IEEE80211_DPRINTF(("%s: extended rate set too large;" 505 " only using %u of %u rates\n", 506 __func__, nxrates, xrates[1])); 507 ic->ic_stats.is_rx_rstoobig++; 508 } 509 memcpy(rs->rs_rates + rs->rs_nrates, xrates+2, nxrates); 510 rs->rs_nrates += nxrates; 511 } 512 return ieee80211_fix_rate(ic, ni, flags); 513 } 514 515 /* Verify the existence and length of __elem or get out. */ 516 #define IEEE80211_VERIFY_ELEMENT(__elem, __maxlen) do { \ 517 if ((__elem) == NULL) { \ 518 IEEE80211_DPRINTF(("%s: no " #__elem "in %s frame\n", \ 519 __func__, ieee80211_mgt_subtype_name[subtype >> \ 520 IEEE80211_FC0_SUBTYPE_SHIFT])); \ 521 ic->ic_stats.is_rx_elem_missing++; \ 522 return; \ 523 } \ 524 if ((__elem)[1] > (__maxlen)) { \ 525 IEEE80211_DPRINTF(("%s: bad " #__elem " len %d in %s " \ 526 "frame from %s\n", __func__, (__elem)[1], \ 527 ieee80211_mgt_subtype_name[subtype >> \ 528 IEEE80211_FC0_SUBTYPE_SHIFT], \ 529 ether_sprintf(wh->i_addr2))); \ 530 ic->ic_stats.is_rx_elem_toobig++; \ 531 return; \ 532 } \ 533 } while (0) 534 535 #define IEEE80211_VERIFY_LENGTH(_len, _minlen) do { \ 536 if ((_len) < (_minlen)) { \ 537 IEEE80211_DPRINTF(("%s: %s frame too short from %s\n", \ 538 __func__, \ 539 ieee80211_mgt_subtype_name[subtype >> \ 540 IEEE80211_FC0_SUBTYPE_SHIFT], \ 541 ether_sprintf(wh->i_addr2))); \ 542 ic->ic_stats.is_rx_elem_toosmall++; \ 543 return; \ 544 } \ 545 } while (0) 546 547 void 548 ieee80211_recv_mgmt(struct ieee80211com *ic, struct mbuf *m0, 549 struct ieee80211_node *ni, 550 int subtype, int rssi, u_int32_t rstamp) 551 { 552 #define ISPROBE(_st) ((_st) == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 553 struct ifnet *ifp = &ic->ic_if; 554 struct ieee80211_frame *wh; 555 u_int8_t *frm, *efrm; 556 u_int8_t *ssid, *rates, *xrates; 557 int reassoc, resp, newassoc, allocbs; 558 559 wh = mtod(m0, struct ieee80211_frame *); 560 frm = (u_int8_t *)&wh[1]; 561 efrm = mtod(m0, u_int8_t *) + m0->m_len; 562 switch (subtype) { 563 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 564 case IEEE80211_FC0_SUBTYPE_BEACON: { 565 u_int8_t *tstamp, *bintval, *capinfo, *country; 566 u_int8_t chan, bchan, fhindex, erp; 567 u_int16_t fhdwell; 568 569 if (ic->ic_opmode != IEEE80211_M_IBSS && 570 ic->ic_state != IEEE80211_S_SCAN) { 571 /* XXX: may be useful for background scan */ 572 return; 573 } 574 575 /* 576 * beacon/probe response frame format 577 * [8] time stamp 578 * [2] beacon interval 579 * [2] capability information 580 * [tlv] ssid 581 * [tlv] supported rates 582 * [tlv] country information 583 * [tlv] parameter set (FH/DS) 584 * [tlv] erp information 585 * [tlv] extended supported rates 586 */ 587 IEEE80211_VERIFY_LENGTH(efrm - frm, 12); 588 tstamp = frm; frm += 8; 589 bintval = frm; frm += 2; 590 capinfo = frm; frm += 2; 591 ssid = rates = xrates = country = NULL; 592 bchan = ieee80211_chan2ieee(ic, ic->ic_bss->ni_chan); 593 chan = bchan; 594 fhdwell = 0; 595 fhindex = 0; 596 erp = 0; 597 while (frm < efrm) { 598 switch (*frm) { 599 case IEEE80211_ELEMID_SSID: 600 ssid = frm; 601 break; 602 case IEEE80211_ELEMID_RATES: 603 rates = frm; 604 break; 605 case IEEE80211_ELEMID_COUNTRY: 606 country = frm; 607 break; 608 case IEEE80211_ELEMID_FHPARMS: 609 if (ic->ic_phytype == IEEE80211_T_FH) { 610 fhdwell = (frm[3] << 8) | frm[2]; 611 chan = IEEE80211_FH_CHAN(frm[4], frm[5]); 612 fhindex = frm[6]; 613 } 614 break; 615 case IEEE80211_ELEMID_DSPARMS: 616 /* 617 * XXX hack this since depending on phytype 618 * is problematic for multi-mode devices. 619 */ 620 if (ic->ic_phytype != IEEE80211_T_FH) 621 chan = frm[2]; 622 break; 623 case IEEE80211_ELEMID_TIM: 624 break; 625 case IEEE80211_ELEMID_XRATES: 626 xrates = frm; 627 break; 628 case IEEE80211_ELEMID_ERP: 629 if (frm[1] != 1) { 630 IEEE80211_DPRINTF(("%s: invalid ERP " 631 "element; length %u, expecting " 632 "1\n", __func__, frm[1])); 633 ic->ic_stats.is_rx_elem_toobig++; 634 break; 635 } 636 erp = frm[2]; 637 break; 638 default: 639 IEEE80211_DPRINTF2(("%s: element id %u/len %u " 640 "ignored\n", __func__, *frm, frm[1])); 641 ic->ic_stats.is_rx_elem_unknown++; 642 break; 643 } 644 frm += frm[1] + 2; 645 } 646 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE); 647 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN); 648 if ( 649 #if IEEE80211_CHAN_MAX < 255 650 chan > IEEE80211_CHAN_MAX || 651 #endif 652 isclr(ic->ic_chan_active, chan)) { 653 IEEE80211_DPRINTF(("%s: ignore %s with invalid channel " 654 "%u\n", __func__, 655 ISPROBE(subtype) ? "probe response" : "beacon", 656 chan)); 657 ic->ic_stats.is_rx_badchan++; 658 return; 659 } 660 if (chan != bchan) { 661 /* 662 * Frame was received on a channel different from the 663 * one indicated in the DS/FH params element id; 664 * silently discard it. 665 * 666 * NB: this can happen due to signal leakage. 667 */ 668 IEEE80211_DPRINTF(("%s: ignore %s on channel %u marked " 669 "for channel %u\n", __func__, 670 ISPROBE(subtype) ? "probe response" : "beacon", 671 bchan, chan)); 672 ic->ic_stats.is_rx_chanmismatch++; 673 return; 674 } 675 676 /* 677 * Use mac and channel for lookup so we collect all 678 * potential AP's when scanning. Otherwise we may 679 * see the same AP on multiple channels and will only 680 * record the last one. We could filter APs here based 681 * on rssi, etc. but leave that to the end of the scan 682 * so we can keep the selection criteria in one spot. 683 * This may result in a bloat of the scanned AP list but 684 * it shouldn't be too much. 685 */ 686 ni = ieee80211_lookup_node(ic, wh->i_addr2, 687 &ic->ic_channels[chan]); 688 #ifdef IEEE80211_DEBUG 689 if (ieee80211_debug && 690 (ni == NULL || ic->ic_state == IEEE80211_S_SCAN)) { 691 printf("%s: %s%s on chan %u (bss chan %u) ", 692 __func__, (ni == NULL ? "new " : ""), 693 ISPROBE(subtype) ? "probe response" : "beacon", 694 chan, bchan); 695 ieee80211_print_essid(ssid + 2, ssid[1]); 696 printf(" from %s\n", ether_sprintf(wh->i_addr2)); 697 printf("%s: caps 0x%x bintval %u erp 0x%x\n", 698 __func__, le16toh(*(u_int16_t *)capinfo), 699 le16toh(*(u_int16_t *)bintval), erp); 700 if (country) 701 printf("%s: country info %*D\n", 702 __func__, country[1], country+2, " "); 703 } 704 #endif 705 if (ni == NULL) { 706 ni = ieee80211_alloc_node(ic, wh->i_addr2); 707 if (ni == NULL) { 708 ic->ic_stats.is_rx_nodealloc++; 709 return; 710 } 711 ni->ni_esslen = ssid[1]; 712 memset(ni->ni_essid, 0, sizeof(ni->ni_essid)); 713 memcpy(ni->ni_essid, ssid + 2, ssid[1]); 714 } else if (ssid[1] != 0 && ISPROBE(subtype)) { 715 /* 716 * Update ESSID at probe response to adopt hidden AP by 717 * Lucent/Cisco, which announces null ESSID in beacon. 718 */ 719 ni->ni_esslen = ssid[1]; 720 memset(ni->ni_essid, 0, sizeof(ni->ni_essid)); 721 memcpy(ni->ni_essid, ssid + 2, ssid[1]); 722 } 723 IEEE80211_ADDR_COPY(ni->ni_bssid, wh->i_addr3); 724 ni->ni_rssi = rssi; 725 ni->ni_rstamp = rstamp; 726 memcpy(ni->ni_tstamp, tstamp, sizeof(ni->ni_tstamp)); 727 ni->ni_intval = le16toh(*(u_int16_t *)bintval); 728 ni->ni_capinfo = le16toh(*(u_int16_t *)capinfo); 729 /* XXX validate channel # */ 730 ni->ni_chan = &ic->ic_channels[chan]; 731 ni->ni_fhdwell = fhdwell; 732 ni->ni_fhindex = fhindex; 733 ni->ni_erp = erp; 734 /* NB: must be after ni_chan is setup */ 735 ieee80211_setup_rates(ic, ni, rates, xrates, IEEE80211_F_DOSORT); 736 ieee80211_unref_node(&ni); 737 break; 738 } 739 740 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: { 741 u_int8_t rate; 742 743 if (ic->ic_opmode == IEEE80211_M_STA) 744 return; 745 if (ic->ic_state != IEEE80211_S_RUN) 746 return; 747 748 /* 749 * prreq frame format 750 * [tlv] ssid 751 * [tlv] supported rates 752 * [tlv] extended supported rates 753 */ 754 ssid = rates = xrates = NULL; 755 while (frm < efrm) { 756 switch (*frm) { 757 case IEEE80211_ELEMID_SSID: 758 ssid = frm; 759 break; 760 case IEEE80211_ELEMID_RATES: 761 rates = frm; 762 break; 763 case IEEE80211_ELEMID_XRATES: 764 xrates = frm; 765 break; 766 } 767 frm += frm[1] + 2; 768 } 769 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE); 770 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN); 771 if (ssid[1] != 0 && 772 (ssid[1] != ic->ic_bss->ni_esslen || 773 memcmp(ssid + 2, ic->ic_bss->ni_essid, ic->ic_bss->ni_esslen) != 0)) { 774 #ifdef IEEE80211_DEBUG 775 if (ieee80211_debug) { 776 printf("%s: ssid unmatch ", __func__); 777 ieee80211_print_essid(ssid + 2, ssid[1]); 778 printf(" from %s\n", ether_sprintf(wh->i_addr2)); 779 } 780 #endif 781 ic->ic_stats.is_rx_ssidmismatch++; 782 return; 783 } 784 785 if (ni == ic->ic_bss) { 786 ni = ieee80211_dup_bss(ic, wh->i_addr2); 787 if (ni == NULL) { 788 ic->ic_stats.is_rx_nodealloc++; 789 return; 790 } 791 IEEE80211_DPRINTF(("%s: new req from %s\n", 792 __func__, ether_sprintf(wh->i_addr2))); 793 allocbs = 1; 794 } else 795 allocbs = 0; 796 ni->ni_rssi = rssi; 797 ni->ni_rstamp = rstamp; 798 rate = ieee80211_setup_rates(ic, ni, rates, xrates, 799 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE 800 | IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 801 if (rate & IEEE80211_RATE_BASIC) { 802 IEEE80211_DPRINTF(("%s: rate negotiation failed: %s\n", 803 __func__,ether_sprintf(wh->i_addr2))); 804 } else { 805 IEEE80211_SEND_MGMT(ic, ni, 806 IEEE80211_FC0_SUBTYPE_PROBE_RESP, 0); 807 } 808 if (allocbs) { 809 /* XXX just use free? */ 810 if (ic->ic_opmode == IEEE80211_M_HOSTAP) 811 ieee80211_free_node(ic, ni); 812 else 813 ieee80211_unref_node(&ni); 814 } 815 break; 816 } 817 818 case IEEE80211_FC0_SUBTYPE_AUTH: { 819 u_int16_t algo, seq, status; 820 /* 821 * auth frame format 822 * [2] algorithm 823 * [2] sequence 824 * [2] status 825 * [tlv*] challenge 826 */ 827 IEEE80211_VERIFY_LENGTH(efrm - frm, 6); 828 algo = le16toh(*(u_int16_t *)frm); 829 seq = le16toh(*(u_int16_t *)(frm + 2)); 830 status = le16toh(*(u_int16_t *)(frm + 4)); 831 if (algo != IEEE80211_AUTH_ALG_OPEN) { 832 /* TODO: shared key auth */ 833 IEEE80211_DPRINTF(("%s: unsupported auth %d from %s\n", 834 __func__, algo, ether_sprintf(wh->i_addr2))); 835 ic->ic_stats.is_rx_auth_unsupported++; 836 return; 837 } 838 switch (ic->ic_opmode) { 839 case IEEE80211_M_IBSS: 840 if (ic->ic_state != IEEE80211_S_RUN || seq != 1) { 841 IEEE80211_DPRINTF(("%s: discard auth from %s; " 842 "state %u, seq %u\n", __func__, 843 ether_sprintf(wh->i_addr2), 844 ic->ic_state, seq)); 845 ic->ic_stats.is_rx_bad_auth++; 846 break; 847 } 848 ieee80211_new_state(ic, IEEE80211_S_AUTH, 849 wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK); 850 break; 851 852 case IEEE80211_M_AHDEMO: 853 /* should not come here */ 854 break; 855 856 case IEEE80211_M_HOSTAP: 857 if (ic->ic_state != IEEE80211_S_RUN || seq != 1) { 858 IEEE80211_DPRINTF(("%s: discard auth from %s; " 859 "state %u, seq %u\n", __func__, 860 ether_sprintf(wh->i_addr2), 861 ic->ic_state, seq)); 862 ic->ic_stats.is_rx_bad_auth++; 863 break; 864 } 865 if (ni == ic->ic_bss) { 866 ni = ieee80211_alloc_node(ic, wh->i_addr2); 867 if (ni == NULL) { 868 ic->ic_stats.is_rx_nodealloc++; 869 return; 870 } 871 IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_bss->ni_bssid); 872 ni->ni_rssi = rssi; 873 ni->ni_rstamp = rstamp; 874 ni->ni_chan = ic->ic_bss->ni_chan; 875 allocbs = 1; 876 } else 877 allocbs = 0; 878 IEEE80211_SEND_MGMT(ic, ni, 879 IEEE80211_FC0_SUBTYPE_AUTH, 2); 880 if (ifp->if_flags & IFF_DEBUG) 881 if_printf(ifp, "station %s %s authenticated\n", 882 (allocbs ? "newly" : "already"), 883 ether_sprintf(ni->ni_macaddr)); 884 break; 885 886 case IEEE80211_M_STA: 887 if (ic->ic_state != IEEE80211_S_AUTH || seq != 2) { 888 IEEE80211_DPRINTF(("%s: discard auth from %s; " 889 "state %u, seq %u\n", __func__, 890 ether_sprintf(wh->i_addr2), 891 ic->ic_state, seq)); 892 ic->ic_stats.is_rx_bad_auth++; 893 break; 894 } 895 if (status != 0) { 896 if_printf(&ic->ic_if, 897 "authentication failed (reason %d) for %s\n", 898 status, 899 ether_sprintf(wh->i_addr3)); 900 if (ni != ic->ic_bss) 901 ni->ni_fails++; 902 ic->ic_stats.is_rx_auth_fail++; 903 return; 904 } 905 ieee80211_new_state(ic, IEEE80211_S_ASSOC, 906 wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK); 907 break; 908 case IEEE80211_M_MONITOR: 909 break; 910 } 911 break; 912 } 913 914 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 915 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: { 916 u_int16_t capinfo, bintval; 917 918 if (ic->ic_opmode != IEEE80211_M_HOSTAP || 919 (ic->ic_state != IEEE80211_S_RUN)) 920 return; 921 922 if (subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) { 923 reassoc = 1; 924 resp = IEEE80211_FC0_SUBTYPE_REASSOC_RESP; 925 } else { 926 reassoc = 0; 927 resp = IEEE80211_FC0_SUBTYPE_ASSOC_RESP; 928 } 929 /* 930 * asreq frame format 931 * [2] capability information 932 * [2] listen interval 933 * [6*] current AP address (reassoc only) 934 * [tlv] ssid 935 * [tlv] supported rates 936 * [tlv] extended supported rates 937 */ 938 IEEE80211_VERIFY_LENGTH(efrm - frm, (reassoc ? 10 : 4)); 939 if (!IEEE80211_ADDR_EQ(wh->i_addr3, ic->ic_bss->ni_bssid)) { 940 IEEE80211_DPRINTF(("%s: ignore other bss from %s\n", 941 __func__, ether_sprintf(wh->i_addr2))); 942 ic->ic_stats.is_rx_assoc_bss++; 943 return; 944 } 945 capinfo = le16toh(*(u_int16_t *)frm); frm += 2; 946 bintval = le16toh(*(u_int16_t *)frm); frm += 2; 947 if (reassoc) 948 frm += 6; /* ignore current AP info */ 949 ssid = rates = xrates = NULL; 950 while (frm < efrm) { 951 switch (*frm) { 952 case IEEE80211_ELEMID_SSID: 953 ssid = frm; 954 break; 955 case IEEE80211_ELEMID_RATES: 956 rates = frm; 957 break; 958 case IEEE80211_ELEMID_XRATES: 959 xrates = frm; 960 break; 961 } 962 frm += frm[1] + 2; 963 } 964 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE); 965 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN); 966 if (ssid[1] != ic->ic_bss->ni_esslen || 967 memcmp(ssid + 2, ic->ic_bss->ni_essid, ssid[1]) != 0) { 968 #ifdef IEEE80211_DEBUG 969 if (ieee80211_debug) { 970 printf("%s: ssid unmatch ", __func__); 971 ieee80211_print_essid(ssid + 2, ssid[1]); 972 printf(" from %s\n", ether_sprintf(wh->i_addr2)); 973 } 974 #endif 975 ic->ic_stats.is_rx_ssidmismatch++; 976 return; 977 } 978 if (ni == ic->ic_bss) { 979 IEEE80211_DPRINTF(("%s: not authenticated for %s\n", 980 __func__, ether_sprintf(wh->i_addr2))); 981 ni = ieee80211_dup_bss(ic, wh->i_addr2); 982 if (ni != NULL) { 983 IEEE80211_SEND_MGMT(ic, ni, 984 IEEE80211_FC0_SUBTYPE_DEAUTH, 985 IEEE80211_REASON_ASSOC_NOT_AUTHED); 986 ieee80211_free_node(ic, ni); 987 } 988 ic->ic_stats.is_rx_assoc_notauth++; 989 return; 990 } 991 /* XXX per-node cipher suite */ 992 /* XXX some stations use the privacy bit for handling APs 993 that suport both encrypted and unencrypted traffic */ 994 if ((capinfo & IEEE80211_CAPINFO_ESS) == 0 || 995 (capinfo & IEEE80211_CAPINFO_PRIVACY) != 996 ((ic->ic_flags & IEEE80211_F_WEPON) ? 997 IEEE80211_CAPINFO_PRIVACY : 0)) { 998 IEEE80211_DPRINTF(("%s: capability mismatch %x for %s\n", 999 __func__, capinfo, ether_sprintf(wh->i_addr2))); 1000 ni->ni_associd = 0; 1001 IEEE80211_SEND_MGMT(ic, ni, resp, 1002 IEEE80211_STATUS_CAPINFO); 1003 ic->ic_stats.is_rx_assoc_capmismatch++; 1004 return; 1005 } 1006 ieee80211_setup_rates(ic, ni, rates, xrates, 1007 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1008 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1009 if (ni->ni_rates.rs_nrates == 0) { 1010 IEEE80211_DPRINTF(("%s: rate unmatch for %s\n", 1011 __func__, ether_sprintf(wh->i_addr2))); 1012 ni->ni_associd = 0; 1013 IEEE80211_SEND_MGMT(ic, ni, resp, 1014 IEEE80211_STATUS_BASIC_RATE); 1015 ic->ic_stats.is_rx_assoc_norate++; 1016 return; 1017 } 1018 ni->ni_rssi = rssi; 1019 ni->ni_rstamp = rstamp; 1020 ni->ni_intval = bintval; 1021 ni->ni_capinfo = capinfo; 1022 ni->ni_chan = ic->ic_bss->ni_chan; 1023 ni->ni_fhdwell = ic->ic_bss->ni_fhdwell; 1024 ni->ni_fhindex = ic->ic_bss->ni_fhindex; 1025 if (ni->ni_associd == 0) { 1026 /* XXX handle rollover at 2007 */ 1027 /* XXX guarantee uniqueness */ 1028 ni->ni_associd = 0xc000 | ic->ic_bss->ni_associd++; 1029 newassoc = 1; 1030 } else 1031 newassoc = 0; 1032 /* XXX for 11g must turn off short slot time if long 1033 slot time sta associates */ 1034 IEEE80211_SEND_MGMT(ic, ni, resp, IEEE80211_STATUS_SUCCESS); 1035 if (ifp->if_flags & IFF_DEBUG) 1036 if_printf(ifp, "station %s %s associated\n", 1037 (newassoc ? "newly" : "already"), 1038 ether_sprintf(ni->ni_macaddr)); 1039 /* give driver a chance to setup state like ni_txrate */ 1040 if (ic->ic_newassoc) 1041 (*ic->ic_newassoc)(ic, ni, newassoc); 1042 break; 1043 } 1044 1045 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 1046 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: { 1047 u_int16_t status; 1048 1049 if (ic->ic_opmode != IEEE80211_M_STA || 1050 ic->ic_state != IEEE80211_S_ASSOC) 1051 return; 1052 1053 /* 1054 * asresp frame format 1055 * [2] capability information 1056 * [2] status 1057 * [2] association ID 1058 * [tlv] supported rates 1059 * [tlv] extended supported rates 1060 */ 1061 IEEE80211_VERIFY_LENGTH(efrm - frm, 6); 1062 ni = ic->ic_bss; 1063 ni->ni_capinfo = le16toh(*(u_int16_t *)frm); 1064 frm += 2; 1065 1066 status = le16toh(*(u_int16_t *)frm); 1067 frm += 2; 1068 if (status != 0) { 1069 if_printf(ifp, "association failed (reason %d) for %s\n", 1070 status, ether_sprintf(wh->i_addr3)); 1071 if (ni != ic->ic_bss) 1072 ni->ni_fails++; 1073 ic->ic_stats.is_rx_auth_fail++; 1074 return; 1075 } 1076 ni->ni_associd = le16toh(*(u_int16_t *)frm); 1077 frm += 2; 1078 1079 rates = xrates = NULL; 1080 while (frm < efrm) { 1081 switch (*frm) { 1082 case IEEE80211_ELEMID_RATES: 1083 rates = frm; 1084 break; 1085 case IEEE80211_ELEMID_XRATES: 1086 xrates = frm; 1087 break; 1088 } 1089 frm += frm[1] + 2; 1090 } 1091 1092 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE); 1093 ieee80211_setup_rates(ic, ni, rates, xrates, 1094 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1095 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1096 if (ni->ni_rates.rs_nrates != 0) 1097 ieee80211_new_state(ic, IEEE80211_S_RUN, 1098 wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK); 1099 break; 1100 } 1101 1102 case IEEE80211_FC0_SUBTYPE_DEAUTH: { 1103 u_int16_t reason; 1104 /* 1105 * deauth frame format 1106 * [2] reason 1107 */ 1108 IEEE80211_VERIFY_LENGTH(efrm - frm, 2); 1109 reason = le16toh(*(u_int16_t *)frm); 1110 ic->ic_stats.is_rx_deauth++; 1111 switch (ic->ic_opmode) { 1112 case IEEE80211_M_STA: 1113 ieee80211_new_state(ic, IEEE80211_S_AUTH, 1114 wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK); 1115 break; 1116 case IEEE80211_M_HOSTAP: 1117 if (ni != ic->ic_bss) { 1118 if (ifp->if_flags & IFF_DEBUG) 1119 if_printf(ifp, "station %s deauthenticated" 1120 " by peer (reason %d)\n", 1121 ether_sprintf(ni->ni_macaddr), reason); 1122 /* node will be free'd on return */ 1123 ieee80211_unref_node(&ni); 1124 } 1125 break; 1126 default: 1127 break; 1128 } 1129 break; 1130 } 1131 1132 case IEEE80211_FC0_SUBTYPE_DISASSOC: { 1133 u_int16_t reason; 1134 /* 1135 * disassoc frame format 1136 * [2] reason 1137 */ 1138 IEEE80211_VERIFY_LENGTH(efrm - frm, 2); 1139 reason = le16toh(*(u_int16_t *)frm); 1140 ic->ic_stats.is_rx_disassoc++; 1141 switch (ic->ic_opmode) { 1142 case IEEE80211_M_STA: 1143 ieee80211_new_state(ic, IEEE80211_S_ASSOC, 1144 wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK); 1145 break; 1146 case IEEE80211_M_HOSTAP: 1147 if (ni != ic->ic_bss) { 1148 if (ifp->if_flags & IFF_DEBUG) 1149 if_printf(ifp, "station %s disassociated" 1150 " by peer (reason %d)\n", 1151 ether_sprintf(ni->ni_macaddr), reason); 1152 ni->ni_associd = 0; 1153 /* XXX node reclaimed how? */ 1154 } 1155 break; 1156 default: 1157 break; 1158 } 1159 break; 1160 } 1161 default: 1162 IEEE80211_DPRINTF(("%s: mgmt frame with subtype 0x%x not " 1163 "handled\n", __func__, subtype)); 1164 ic->ic_stats.is_rx_badsubtype++; 1165 break; 1166 } 1167 #undef ISPROBE 1168 } 1169 #undef IEEE80211_VERIFY_LENGTH 1170 #undef IEEE80211_VERIFY_ELEMENT
Cache object: 1574eeed886712fd5271a8c5f866a80b
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]