1 /*- 2 * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 * 25 * $FreeBSD: head/sys/net80211/ieee80211_sta.c 203422 2010-02-03 10:07:43Z rpaulo $ 26 * $DragonFly$ 27 */ 28 29 /* 30 * IEEE 802.11 Station mode support. 31 */ 32 #include "opt_inet.h" 33 #include "opt_wlan.h" 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/mbuf.h> 38 #include <sys/malloc.h> 39 #include <sys/kernel.h> 40 41 #include <sys/socket.h> 42 #include <sys/sockio.h> 43 #include <sys/endian.h> 44 #include <sys/errno.h> 45 #include <sys/proc.h> 46 #include <sys/sysctl.h> 47 48 #include <net/if.h> 49 #include <net/if_media.h> 50 #include <net/if_llc.h> 51 #include <net/ethernet.h> 52 #include <net/route.h> 53 54 #include <net/bpf.h> 55 56 #include <netproto/802_11/ieee80211_var.h> 57 #include <netproto/802_11/ieee80211_sta.h> 58 #include <netproto/802_11/ieee80211_input.h> 59 #ifdef IEEE80211_SUPPORT_SUPERG 60 #include <netproto/802_11/ieee80211_superg.h> 61 #endif 62 63 #define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2) 64 65 static void sta_vattach(struct ieee80211vap *); 66 static void sta_beacon_miss(struct ieee80211vap *); 67 static int sta_newstate(struct ieee80211vap *, enum ieee80211_state, int); 68 static int sta_input(struct ieee80211_node *, struct mbuf *, int, int); 69 static void sta_recv_mgmt(struct ieee80211_node *, struct mbuf *, 70 int subtype, int rssi, int nf); 71 static void sta_recv_ctl(struct ieee80211_node *, struct mbuf *, int subtype); 72 73 void 74 ieee80211_sta_attach(struct ieee80211com *ic) 75 { 76 ic->ic_vattach[IEEE80211_M_STA] = sta_vattach; 77 } 78 79 void 80 ieee80211_sta_detach(struct ieee80211com *ic) 81 { 82 } 83 84 static void 85 sta_vdetach(struct ieee80211vap *vap) 86 { 87 } 88 89 static void 90 sta_vattach(struct ieee80211vap *vap) 91 { 92 vap->iv_newstate = sta_newstate; 93 vap->iv_input = sta_input; 94 vap->iv_recv_mgmt = sta_recv_mgmt; 95 vap->iv_recv_ctl = sta_recv_ctl; 96 vap->iv_opdetach = sta_vdetach; 97 vap->iv_bmiss = sta_beacon_miss; 98 } 99 100 /* 101 * Handle a beacon miss event. The common code filters out 102 * spurious events that can happen when scanning and/or before 103 * reaching RUN state. 104 */ 105 static void 106 sta_beacon_miss(struct ieee80211vap *vap) 107 { 108 struct ieee80211com *ic = vap->iv_ic; 109 110 KASSERT((ic->ic_flags & IEEE80211_F_SCAN) == 0, ("scanning")); 111 KASSERT(vap->iv_state >= IEEE80211_S_RUN, 112 ("wrong state %s", ieee80211_state_name[vap->iv_state])); 113 114 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 115 "beacon miss, mode %s state %s\n", 116 ieee80211_opmode_name[vap->iv_opmode], 117 ieee80211_state_name[vap->iv_state]); 118 119 if (vap->iv_state == IEEE80211_S_CSA) { 120 /* 121 * A Channel Switch is pending; assume we missed the 122 * beacon that would've completed the process and just 123 * force the switch. If we made a mistake we'll not 124 * find the AP on the new channel and fall back to a 125 * normal scan. 126 */ 127 ieee80211_csa_completeswitch(ic); 128 return; 129 } 130 if (++vap->iv_bmiss_count < vap->iv_bmiss_max) { 131 /* 132 * Send a directed probe req before falling back to a 133 * scan; if we receive a response ic_bmiss_count will 134 * be reset. Some cards mistakenly report beacon miss 135 * so this avoids the expensive scan if the ap is 136 * still there. 137 */ 138 ieee80211_send_probereq(vap->iv_bss, vap->iv_myaddr, 139 vap->iv_bss->ni_bssid, vap->iv_bss->ni_bssid, 140 vap->iv_bss->ni_essid, vap->iv_bss->ni_esslen); 141 return; 142 } 143 vap->iv_bmiss_count = 0; 144 vap->iv_stats.is_beacon_miss++; 145 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 146 #ifdef IEEE80211_SUPPORT_SUPERG 147 struct ieee80211com *ic = vap->iv_ic; 148 149 /* 150 * If we receive a beacon miss interrupt when using 151 * dynamic turbo, attempt to switch modes before 152 * reassociating. 153 */ 154 if (IEEE80211_ATH_CAP(vap, vap->iv_bss, IEEE80211_NODE_TURBOP)) 155 ieee80211_dturbo_switch(vap, 156 ic->ic_bsschan->ic_flags ^ IEEE80211_CHAN_TURBO); 157 #endif 158 /* 159 * Try to reassociate before scanning for a new ap. 160 */ 161 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 162 } else { 163 /* 164 * Somebody else is controlling state changes (e.g. 165 * a user-mode app) don't do anything that would 166 * confuse them; just drop into scan mode so they'll 167 * notified of the state change and given control. 168 */ 169 ieee80211_new_state(vap, IEEE80211_S_SCAN, 0); 170 } 171 } 172 173 /* 174 * Handle deauth with reason. We retry only for 175 * the cases where we might succeed. Otherwise 176 * we downgrade the ap and scan. 177 */ 178 static void 179 sta_authretry(struct ieee80211vap *vap, struct ieee80211_node *ni, int reason) 180 { 181 switch (reason) { 182 case IEEE80211_STATUS_SUCCESS: /* NB: MLME assoc */ 183 case IEEE80211_STATUS_TIMEOUT: 184 case IEEE80211_REASON_ASSOC_EXPIRE: 185 case IEEE80211_REASON_NOT_AUTHED: 186 case IEEE80211_REASON_NOT_ASSOCED: 187 case IEEE80211_REASON_ASSOC_LEAVE: 188 case IEEE80211_REASON_ASSOC_NOT_AUTHED: 189 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, 1); 190 break; 191 default: 192 ieee80211_scan_assoc_fail(vap, vap->iv_bss->ni_macaddr, reason); 193 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 194 ieee80211_check_scan_current(vap); 195 break; 196 } 197 } 198 199 /* 200 * IEEE80211_M_STA vap state machine handler. 201 * This routine handles the main states in the 802.11 protocol. 202 */ 203 static int 204 sta_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 205 { 206 struct ieee80211com *ic = vap->iv_ic; 207 struct ieee80211_node *ni; 208 enum ieee80211_state ostate; 209 210 ostate = vap->iv_state; 211 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 212 __func__, ieee80211_state_name[ostate], 213 ieee80211_state_name[nstate], arg); 214 vap->iv_state = nstate; /* state transition */ 215 callout_stop(&vap->iv_mgtsend); /* XXX callout_drain */ 216 if (ostate != IEEE80211_S_SCAN) 217 ieee80211_cancel_scan(vap); /* background scan */ 218 ni = vap->iv_bss; /* NB: no reference held */ 219 if (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS) 220 callout_stop(&vap->iv_swbmiss); 221 switch (nstate) { 222 case IEEE80211_S_INIT: 223 switch (ostate) { 224 case IEEE80211_S_SLEEP: 225 /* XXX wakeup */ 226 case IEEE80211_S_RUN: 227 IEEE80211_SEND_MGMT(ni, 228 IEEE80211_FC0_SUBTYPE_DISASSOC, 229 IEEE80211_REASON_ASSOC_LEAVE); 230 ieee80211_sta_leave(ni); 231 break; 232 case IEEE80211_S_ASSOC: 233 IEEE80211_SEND_MGMT(ni, 234 IEEE80211_FC0_SUBTYPE_DEAUTH, 235 IEEE80211_REASON_AUTH_LEAVE); 236 break; 237 case IEEE80211_S_SCAN: 238 ieee80211_cancel_scan(vap); 239 break; 240 default: 241 goto invalid; 242 } 243 if (ostate != IEEE80211_S_INIT) { 244 /* NB: optimize INIT -> INIT case */ 245 ieee80211_reset_bss(vap); 246 } 247 if (vap->iv_auth->ia_detach != NULL) 248 vap->iv_auth->ia_detach(vap); 249 break; 250 case IEEE80211_S_SCAN: 251 switch (ostate) { 252 case IEEE80211_S_INIT: 253 /* 254 * Initiate a scan. We can come here as a result 255 * of an IEEE80211_IOC_SCAN_REQ too in which case 256 * the vap will be marked with IEEE80211_FEXT_SCANREQ 257 * and the scan request parameters will be present 258 * in iv_scanreq. Otherwise we do the default. 259 */ 260 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 261 ieee80211_check_scan(vap, 262 vap->iv_scanreq_flags, 263 vap->iv_scanreq_duration, 264 vap->iv_scanreq_mindwell, 265 vap->iv_scanreq_maxdwell, 266 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 267 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 268 } else 269 ieee80211_check_scan_current(vap); 270 break; 271 case IEEE80211_S_SCAN: 272 case IEEE80211_S_AUTH: 273 case IEEE80211_S_ASSOC: 274 /* 275 * These can happen either because of a timeout 276 * on an assoc/auth response or because of a 277 * change in state that requires a reset. For 278 * the former we're called with a non-zero arg 279 * that is the cause for the failure; pass this 280 * to the scan code so it can update state. 281 * Otherwise trigger a new scan unless we're in 282 * manual roaming mode in which case an application 283 * must issue an explicit scan request. 284 */ 285 if (arg != 0) 286 ieee80211_scan_assoc_fail(vap, 287 vap->iv_bss->ni_macaddr, arg); 288 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 289 ieee80211_check_scan_current(vap); 290 break; 291 case IEEE80211_S_RUN: /* beacon miss */ 292 /* 293 * Beacon miss. Notify user space and if not 294 * under control of a user application (roaming 295 * manual) kick off a scan to re-connect. 296 */ 297 ieee80211_sta_leave(ni); 298 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 299 ieee80211_check_scan_current(vap); 300 break; 301 default: 302 goto invalid; 303 } 304 break; 305 case IEEE80211_S_AUTH: 306 switch (ostate) { 307 case IEEE80211_S_INIT: 308 case IEEE80211_S_SCAN: 309 IEEE80211_SEND_MGMT(ni, 310 IEEE80211_FC0_SUBTYPE_AUTH, 1); 311 break; 312 case IEEE80211_S_AUTH: 313 case IEEE80211_S_ASSOC: 314 switch (arg & 0xff) { 315 case IEEE80211_FC0_SUBTYPE_AUTH: 316 /* ??? */ 317 IEEE80211_SEND_MGMT(ni, 318 IEEE80211_FC0_SUBTYPE_AUTH, 2); 319 break; 320 case IEEE80211_FC0_SUBTYPE_DEAUTH: 321 sta_authretry(vap, ni, arg>>8); 322 break; 323 } 324 break; 325 case IEEE80211_S_RUN: 326 switch (arg & 0xff) { 327 case IEEE80211_FC0_SUBTYPE_AUTH: 328 IEEE80211_SEND_MGMT(ni, 329 IEEE80211_FC0_SUBTYPE_AUTH, 2); 330 vap->iv_state = ostate; /* stay RUN */ 331 break; 332 case IEEE80211_FC0_SUBTYPE_DEAUTH: 333 ieee80211_sta_leave(ni); 334 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 335 /* try to reauth */ 336 IEEE80211_SEND_MGMT(ni, 337 IEEE80211_FC0_SUBTYPE_AUTH, 1); 338 } 339 break; 340 } 341 break; 342 default: 343 goto invalid; 344 } 345 break; 346 case IEEE80211_S_ASSOC: 347 switch (ostate) { 348 case IEEE80211_S_AUTH: 349 case IEEE80211_S_ASSOC: 350 IEEE80211_SEND_MGMT(ni, 351 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 352 break; 353 case IEEE80211_S_SLEEP: /* cannot happen */ 354 case IEEE80211_S_RUN: 355 ieee80211_sta_leave(ni); 356 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 357 IEEE80211_SEND_MGMT(ni, arg ? 358 IEEE80211_FC0_SUBTYPE_REASSOC_REQ : 359 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 360 } 361 break; 362 default: 363 goto invalid; 364 } 365 break; 366 case IEEE80211_S_RUN: 367 if (vap->iv_flags & IEEE80211_F_WPA) { 368 /* XXX validate prerequisites */ 369 } 370 switch (ostate) { 371 case IEEE80211_S_RUN: 372 case IEEE80211_S_CSA: 373 break; 374 case IEEE80211_S_AUTH: /* when join is done in fw */ 375 case IEEE80211_S_ASSOC: 376 #ifdef IEEE80211_DEBUG 377 if (ieee80211_msg_debug(vap)) { 378 ieee80211_note(vap, "%s with %6D ssid ", 379 (vap->iv_opmode == IEEE80211_M_STA ? 380 "associated" : "synchronized"), 381 ni->ni_bssid, ":"); 382 ieee80211_print_essid(vap->iv_bss->ni_essid, 383 ni->ni_esslen); 384 /* XXX MCS/HT */ 385 kprintf(" channel %d start %uMb\n", 386 ieee80211_chan2ieee(ic, ic->ic_curchan), 387 IEEE80211_RATE2MBS(ni->ni_txrate)); 388 } 389 #endif 390 ieee80211_scan_assoc_success(vap, ni->ni_macaddr); 391 ieee80211_notify_node_join(ni, 392 arg == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 393 break; 394 case IEEE80211_S_SLEEP: 395 ieee80211_sta_pwrsave(vap, 0); 396 break; 397 default: 398 goto invalid; 399 } 400 ieee80211_sync_curchan(ic); 401 if (ostate != IEEE80211_S_RUN && 402 (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS)) { 403 /* 404 * Start s/w beacon miss timer for devices w/o 405 * hardware support. We fudge a bit here since 406 * we're doing this in software. 407 */ 408 vap->iv_swbmiss_period = IEEE80211_TU_TO_TICKS( 409 2 * vap->iv_bmissthreshold * ni->ni_intval); 410 vap->iv_swbmiss_count = 0; 411 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, 412 ieee80211_swbmiss_callout, vap); 413 } 414 /* 415 * When 802.1x is not in use mark the port authorized 416 * at this point so traffic can flow. 417 */ 418 if (ni->ni_authmode != IEEE80211_AUTH_8021X) 419 ieee80211_node_authorize(ni); 420 /* 421 * Fake association when joining an existing bss. 422 */ 423 if (ic->ic_newassoc != NULL) 424 ic->ic_newassoc(vap->iv_bss, ostate != IEEE80211_S_RUN); 425 break; 426 case IEEE80211_S_CSA: 427 if (ostate != IEEE80211_S_RUN) 428 goto invalid; 429 break; 430 case IEEE80211_S_SLEEP: 431 ieee80211_sta_pwrsave(vap, 1); 432 break; 433 default: 434 invalid: 435 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 436 "%s: unexpected state transition %s -> %s\n", __func__, 437 ieee80211_state_name[ostate], ieee80211_state_name[nstate]); 438 break; 439 } 440 return 0; 441 } 442 443 /* 444 * Return non-zero if the frame is an echo of a multicast 445 * frame sent by ourself. The dir is known to be DSTODS. 446 */ 447 static __inline int 448 isdstods_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh) 449 { 450 #define QWH4(wh) ((const struct ieee80211_qosframe_addr4 *)wh) 451 #define WH4(wh) ((const struct ieee80211_frame_addr4 *)wh) 452 const uint8_t *sa; 453 454 KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode")); 455 456 if (!IEEE80211_IS_MULTICAST(wh->i_addr3)) 457 return 0; 458 sa = IEEE80211_QOS_HAS_SEQ(wh) ? QWH4(wh)->i_addr4 : WH4(wh)->i_addr4; 459 return IEEE80211_ADDR_EQ(sa, vap->iv_myaddr); 460 #undef WH4 461 #undef QWH4 462 } 463 464 /* 465 * Return non-zero if the frame is an echo of a multicast 466 * frame sent by ourself. The dir is known to be FROMDS. 467 */ 468 static __inline int 469 isfromds_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh) 470 { 471 KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode")); 472 473 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) 474 return 0; 475 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 476 } 477 478 /* 479 * Decide if a received management frame should be 480 * printed when debugging is enabled. This filters some 481 * of the less interesting frames that come frequently 482 * (e.g. beacons). 483 */ 484 static __inline int 485 doprint(struct ieee80211vap *vap, int subtype) 486 { 487 switch (subtype) { 488 case IEEE80211_FC0_SUBTYPE_BEACON: 489 return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN); 490 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 491 return 0; 492 } 493 return 1; 494 } 495 496 /* 497 * Process a received frame. The node associated with the sender 498 * should be supplied. If nothing was found in the node table then 499 * the caller is assumed to supply a reference to iv_bss instead. 500 * The RSSI and a timestamp are also supplied. The RSSI data is used 501 * during AP scanning to select a AP to associate with; it can have 502 * any units so long as values have consistent units and higher values 503 * mean ``better signal''. The receive timestamp is currently not used 504 * by the 802.11 layer. 505 */ 506 static int 507 sta_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf) 508 { 509 #define SEQ_LEQ(a,b) ((int)((a)-(b)) <= 0) 510 #define HAS_SEQ(type) ((type & 0x4) == 0) 511 struct ieee80211vap *vap = ni->ni_vap; 512 struct ieee80211com *ic = ni->ni_ic; 513 struct ifnet *ifp = vap->iv_ifp; 514 struct ieee80211_frame *wh; 515 struct ieee80211_key *key; 516 struct ether_header *eh; 517 int hdrspace, need_tap = 1; /* mbuf need to be tapped. */ 518 uint8_t dir, type, subtype, qos; 519 uint8_t *bssid; 520 uint16_t rxseq; 521 522 if (m->m_flags & M_AMPDU_MPDU) { 523 /* 524 * Fastpath for A-MPDU reorder q resubmission. Frames 525 * w/ M_AMPDU_MPDU marked have already passed through 526 * here but were received out of order and been held on 527 * the reorder queue. When resubmitted they are marked 528 * with the M_AMPDU_MPDU flag and we can bypass most of 529 * the normal processing. 530 */ 531 wh = mtod(m, struct ieee80211_frame *); 532 type = IEEE80211_FC0_TYPE_DATA; 533 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 534 subtype = IEEE80211_FC0_SUBTYPE_QOS; 535 hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ 536 goto resubmit_ampdu; 537 } 538 539 KASSERT(ni != NULL, ("null node")); 540 ni->ni_inact = ni->ni_inact_reload; 541 542 type = -1; /* undefined */ 543 544 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 545 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 546 ni->ni_macaddr, NULL, 547 "too short (1): len %u", m->m_pkthdr.len); 548 vap->iv_stats.is_rx_tooshort++; 549 goto out; 550 } 551 /* 552 * Bit of a cheat here, we use a pointer for a 3-address 553 * frame format but don't reference fields past outside 554 * ieee80211_frame_min w/o first validating the data is 555 * present. 556 */ 557 wh = mtod(m, struct ieee80211_frame *); 558 559 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 560 IEEE80211_FC0_VERSION_0) { 561 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 562 ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x", 563 wh->i_fc[0], wh->i_fc[1]); 564 vap->iv_stats.is_rx_badversion++; 565 goto err; 566 } 567 568 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 569 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 570 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 571 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 572 bssid = wh->i_addr2; 573 if (!IEEE80211_ADDR_EQ(bssid, ni->ni_bssid)) { 574 /* not interested in */ 575 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 576 bssid, NULL, "%s", "not to bss"); 577 vap->iv_stats.is_rx_wrongbss++; 578 goto out; 579 } 580 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 581 ni->ni_noise = nf; 582 if (HAS_SEQ(type) && !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 583 uint8_t tid = ieee80211_gettid(wh); 584 if (IEEE80211_QOS_HAS_SEQ(wh) && 585 TID_TO_WME_AC(tid) >= WME_AC_VI) 586 ic->ic_wme.wme_hipri_traffic++; 587 rxseq = le16toh(*(uint16_t *)wh->i_seq); 588 if ((ni->ni_flags & IEEE80211_NODE_HT) == 0 && 589 (wh->i_fc[1] & IEEE80211_FC1_RETRY) && 590 SEQ_LEQ(rxseq, ni->ni_rxseqs[tid])) { 591 /* duplicate, discard */ 592 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 593 bssid, "duplicate", 594 "seqno <%u,%u> fragno <%u,%u> tid %u", 595 rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 596 ni->ni_rxseqs[tid] >> 597 IEEE80211_SEQ_SEQ_SHIFT, 598 rxseq & IEEE80211_SEQ_FRAG_MASK, 599 ni->ni_rxseqs[tid] & 600 IEEE80211_SEQ_FRAG_MASK, 601 tid); 602 vap->iv_stats.is_rx_dup++; 603 IEEE80211_NODE_STAT(ni, rx_dup); 604 goto out; 605 } 606 ni->ni_rxseqs[tid] = rxseq; 607 } 608 } 609 610 switch (type) { 611 case IEEE80211_FC0_TYPE_DATA: 612 hdrspace = ieee80211_hdrspace(ic, wh); 613 if (m->m_len < hdrspace && 614 (m = m_pullup(m, hdrspace)) == NULL) { 615 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 616 ni->ni_macaddr, NULL, 617 "data too short: expecting %u", hdrspace); 618 vap->iv_stats.is_rx_tooshort++; 619 goto out; /* XXX */ 620 } 621 /* 622 * Handle A-MPDU re-ordering. If the frame is to be 623 * processed directly then ieee80211_ampdu_reorder 624 * will return 0; otherwise it has consumed the mbuf 625 * and we should do nothing more with it. 626 */ 627 if ((m->m_flags & M_AMPDU) && 628 (dir == IEEE80211_FC1_DIR_FROMDS || 629 dir == IEEE80211_FC1_DIR_DSTODS) && 630 ieee80211_ampdu_reorder(ni, m) != 0) { 631 m = NULL; 632 goto out; 633 } 634 resubmit_ampdu: 635 if (dir == IEEE80211_FC1_DIR_FROMDS) { 636 if ((ifp->if_flags & IFF_SIMPLEX) && 637 isfromds_mcastecho(vap, wh)) { 638 /* 639 * In IEEE802.11 network, multicast 640 * packets sent from "me" are broadcast 641 * from the AP; silently discard for 642 * SIMPLEX interface. 643 */ 644 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 645 wh, "data", "%s", "multicast echo"); 646 vap->iv_stats.is_rx_mcastecho++; 647 goto out; 648 } 649 if ((vap->iv_flags & IEEE80211_F_DWDS) && 650 IEEE80211_IS_MULTICAST(wh->i_addr1)) { 651 /* 652 * DWDS sta's must drop 3-address mcast frames 653 * as they will be sent separately as a 4-addr 654 * frame. Accepting the 3-addr frame will 655 * confuse the bridge into thinking the sending 656 * sta is located at the end of WDS link. 657 */ 658 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 659 "3-address data", "%s", "DWDS enabled"); 660 vap->iv_stats.is_rx_mcastecho++; 661 goto out; 662 } 663 } else if (dir == IEEE80211_FC1_DIR_DSTODS) { 664 if ((vap->iv_flags & IEEE80211_F_DWDS) == 0) { 665 IEEE80211_DISCARD(vap, 666 IEEE80211_MSG_INPUT, wh, "4-address data", 667 "%s", "DWDS not enabled"); 668 vap->iv_stats.is_rx_wrongdir++; 669 goto out; 670 } 671 if ((ifp->if_flags & IFF_SIMPLEX) && 672 isdstods_mcastecho(vap, wh)) { 673 /* 674 * In IEEE802.11 network, multicast 675 * packets sent from "me" are broadcast 676 * from the AP; silently discard for 677 * SIMPLEX interface. 678 */ 679 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 680 "4-address data", "%s", "multicast echo"); 681 vap->iv_stats.is_rx_mcastecho++; 682 goto out; 683 } 684 } else { 685 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 686 "data", "incorrect dir 0x%x", dir); 687 vap->iv_stats.is_rx_wrongdir++; 688 goto out; 689 } 690 691 /* 692 * Handle privacy requirements. Note that we 693 * must not be preempted from here until after 694 * we (potentially) call ieee80211_crypto_demic; 695 * otherwise we may violate assumptions in the 696 * crypto cipher modules used to do delayed update 697 * of replay sequence numbers. 698 */ 699 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 700 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 701 /* 702 * Discard encrypted frames when privacy is off. 703 */ 704 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 705 wh, "WEP", "%s", "PRIVACY off"); 706 vap->iv_stats.is_rx_noprivacy++; 707 IEEE80211_NODE_STAT(ni, rx_noprivacy); 708 goto out; 709 } 710 key = ieee80211_crypto_decap(ni, m, hdrspace); 711 if (key == NULL) { 712 /* NB: stats+msgs handled in crypto_decap */ 713 IEEE80211_NODE_STAT(ni, rx_wepfail); 714 goto out; 715 } 716 wh = mtod(m, struct ieee80211_frame *); 717 wh->i_fc[1] &= ~IEEE80211_FC1_WEP; 718 } else { 719 /* XXX M_WEP and IEEE80211_F_PRIVACY */ 720 key = NULL; 721 } 722 723 /* 724 * Save QoS bits for use below--before we strip the header. 725 */ 726 if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { 727 qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? 728 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : 729 ((struct ieee80211_qosframe *)wh)->i_qos[0]; 730 } else 731 qos = 0; 732 733 /* 734 * Next up, any fragmentation. 735 */ 736 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 737 m = ieee80211_defrag(ni, m, hdrspace); 738 if (m == NULL) { 739 /* Fragment dropped or frame not complete yet */ 740 goto out; 741 } 742 } 743 wh = NULL; /* no longer valid, catch any uses */ 744 745 /* 746 * Next strip any MSDU crypto bits. 747 */ 748 if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) { 749 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 750 ni->ni_macaddr, "data", "%s", "demic error"); 751 vap->iv_stats.is_rx_demicfail++; 752 IEEE80211_NODE_STAT(ni, rx_demicfail); 753 goto out; 754 } 755 756 /* copy to listener after decrypt */ 757 if (ieee80211_radiotap_active_vap(vap)) 758 ieee80211_radiotap_rx(vap, m); 759 need_tap = 0; 760 761 /* 762 * Finally, strip the 802.11 header. 763 */ 764 m = ieee80211_decap(vap, m, hdrspace); 765 if (m == NULL) { 766 /* XXX mask bit to check for both */ 767 /* don't count Null data frames as errors */ 768 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 769 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 770 goto out; 771 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 772 ni->ni_macaddr, "data", "%s", "decap error"); 773 vap->iv_stats.is_rx_decap++; 774 IEEE80211_NODE_STAT(ni, rx_decap); 775 goto err; 776 } 777 eh = mtod(m, struct ether_header *); 778 if (!ieee80211_node_is_authorized(ni)) { 779 /* 780 * Deny any non-PAE frames received prior to 781 * authorization. For open/shared-key 782 * authentication the port is mark authorized 783 * after authentication completes. For 802.1x 784 * the port is not marked authorized by the 785 * authenticator until the handshake has completed. 786 */ 787 if (eh->ether_type != htons(ETHERTYPE_PAE)) { 788 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 789 eh->ether_shost, "data", 790 "unauthorized port: ether type 0x%x len %u", 791 eh->ether_type, m->m_pkthdr.len); 792 vap->iv_stats.is_rx_unauth++; 793 IEEE80211_NODE_STAT(ni, rx_unauth); 794 goto err; 795 } 796 } else { 797 /* 798 * When denying unencrypted frames, discard 799 * any non-PAE frames received without encryption. 800 */ 801 if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && 802 (key == NULL && (m->m_flags & M_WEP) == 0) && 803 eh->ether_type != htons(ETHERTYPE_PAE)) { 804 /* 805 * Drop unencrypted frames. 806 */ 807 vap->iv_stats.is_rx_unencrypted++; 808 IEEE80211_NODE_STAT(ni, rx_unencrypted); 809 goto out; 810 } 811 } 812 /* XXX require HT? */ 813 if (qos & IEEE80211_QOS_AMSDU) { 814 m = ieee80211_decap_amsdu(ni, m); 815 if (m == NULL) 816 return IEEE80211_FC0_TYPE_DATA; 817 } else { 818 #ifdef IEEE80211_SUPPORT_SUPERG 819 m = ieee80211_decap_fastframe(vap, ni, m); 820 if (m == NULL) 821 return IEEE80211_FC0_TYPE_DATA; 822 #endif 823 } 824 ieee80211_deliver_data(vap, ni, m); 825 return IEEE80211_FC0_TYPE_DATA; 826 827 case IEEE80211_FC0_TYPE_MGT: 828 vap->iv_stats.is_rx_mgmt++; 829 IEEE80211_NODE_STAT(ni, rx_mgmt); 830 if (dir != IEEE80211_FC1_DIR_NODS) { 831 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 832 wh, "data", "incorrect dir 0x%x", dir); 833 vap->iv_stats.is_rx_wrongdir++; 834 goto err; 835 } 836 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 837 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 838 ni->ni_macaddr, "mgt", "too short: len %u", 839 m->m_pkthdr.len); 840 vap->iv_stats.is_rx_tooshort++; 841 goto out; 842 } 843 #ifdef IEEE80211_DEBUG 844 if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) || 845 ieee80211_msg_dumppkts(vap)) { 846 if_printf(ifp, "received %s from %6D rssi %d\n", 847 ieee80211_mgt_subtype_name[subtype >> 848 IEEE80211_FC0_SUBTYPE_SHIFT], 849 wh->i_addr2, ":", rssi); 850 } 851 #endif 852 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 853 if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) { 854 /* 855 * Only shared key auth frames with a challenge 856 * should be encrypted, discard all others. 857 */ 858 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 859 wh, ieee80211_mgt_subtype_name[subtype >> 860 IEEE80211_FC0_SUBTYPE_SHIFT], 861 "%s", "WEP set but not permitted"); 862 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 863 goto out; 864 } 865 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 866 /* 867 * Discard encrypted frames when privacy is off. 868 */ 869 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 870 wh, "mgt", "%s", "WEP set but PRIVACY off"); 871 vap->iv_stats.is_rx_noprivacy++; 872 goto out; 873 } 874 hdrspace = ieee80211_hdrspace(ic, wh); 875 key = ieee80211_crypto_decap(ni, m, hdrspace); 876 if (key == NULL) { 877 /* NB: stats+msgs handled in crypto_decap */ 878 goto out; 879 } 880 wh = mtod(m, struct ieee80211_frame *); 881 wh->i_fc[1] &= ~IEEE80211_FC1_WEP; 882 } 883 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf); 884 goto out; 885 886 case IEEE80211_FC0_TYPE_CTL: 887 vap->iv_stats.is_rx_ctl++; 888 IEEE80211_NODE_STAT(ni, rx_ctrl); 889 vap->iv_recv_ctl(ni, m, subtype); 890 goto out; 891 892 default: 893 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 894 wh, NULL, "bad frame type 0x%x", type); 895 /* should not come here */ 896 break; 897 } 898 err: 899 ifp->if_ierrors++; 900 out: 901 if (m != NULL) { 902 if (need_tap && ieee80211_radiotap_active_vap(vap)) 903 ieee80211_radiotap_rx(vap, m); 904 m_freem(m); 905 } 906 return type; 907 #undef SEQ_LEQ 908 } 909 910 static void 911 sta_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh, 912 int rssi, int nf, uint16_t seq, uint16_t status) 913 { 914 struct ieee80211vap *vap = ni->ni_vap; 915 916 if (ni->ni_authmode == IEEE80211_AUTH_SHARED) { 917 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 918 ni->ni_macaddr, "open auth", 919 "bad sta auth mode %u", ni->ni_authmode); 920 vap->iv_stats.is_rx_bad_auth++; /* XXX */ 921 return; 922 } 923 if (vap->iv_state != IEEE80211_S_AUTH || 924 seq != IEEE80211_AUTH_OPEN_RESPONSE) { 925 vap->iv_stats.is_rx_bad_auth++; 926 return; 927 } 928 if (status != 0) { 929 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 930 ni, "open auth failed (reason %d)", status); 931 vap->iv_stats.is_rx_auth_fail++; 932 vap->iv_stats.is_rx_authfail_code = status; 933 ieee80211_new_state(vap, IEEE80211_S_SCAN, 934 IEEE80211_SCAN_FAIL_STATUS); 935 } else 936 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 937 } 938 939 static void 940 sta_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh, 941 uint8_t *frm, uint8_t *efrm, int rssi, int nf, 942 uint16_t seq, uint16_t status) 943 { 944 struct ieee80211vap *vap = ni->ni_vap; 945 uint8_t *challenge; 946 int estatus; 947 948 /* 949 * NB: this can happen as we allow pre-shared key 950 * authentication to be enabled w/o wep being turned 951 * on so that configuration of these can be done 952 * in any order. It may be better to enforce the 953 * ordering in which case this check would just be 954 * for sanity/consistency. 955 */ 956 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 957 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 958 ni->ni_macaddr, "shared key auth", 959 "%s", " PRIVACY is disabled"); 960 estatus = IEEE80211_STATUS_ALG; 961 goto bad; 962 } 963 /* 964 * Pre-shared key authentication is evil; accept 965 * it only if explicitly configured (it is supported 966 * mainly for compatibility with clients like OS X). 967 */ 968 if (ni->ni_authmode != IEEE80211_AUTH_AUTO && 969 ni->ni_authmode != IEEE80211_AUTH_SHARED) { 970 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 971 ni->ni_macaddr, "shared key auth", 972 "bad sta auth mode %u", ni->ni_authmode); 973 vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */ 974 estatus = IEEE80211_STATUS_ALG; 975 goto bad; 976 } 977 978 challenge = NULL; 979 if (frm + 1 < efrm) { 980 if ((frm[1] + 2) > (efrm - frm)) { 981 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 982 ni->ni_macaddr, "shared key auth", 983 "ie %d/%d too long", 984 frm[0], (int)((frm[1] + 2) - (efrm - frm))); 985 vap->iv_stats.is_rx_bad_auth++; 986 estatus = IEEE80211_STATUS_CHALLENGE; 987 goto bad; 988 } 989 if (*frm == IEEE80211_ELEMID_CHALLENGE) 990 challenge = frm; 991 frm += frm[1] + 2; 992 } 993 switch (seq) { 994 case IEEE80211_AUTH_SHARED_CHALLENGE: 995 case IEEE80211_AUTH_SHARED_RESPONSE: 996 if (challenge == NULL) { 997 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 998 ni->ni_macaddr, "shared key auth", 999 "%s", "no challenge"); 1000 vap->iv_stats.is_rx_bad_auth++; 1001 estatus = IEEE80211_STATUS_CHALLENGE; 1002 goto bad; 1003 } 1004 if (challenge[1] != IEEE80211_CHALLENGE_LEN) { 1005 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1006 ni->ni_macaddr, "shared key auth", 1007 "bad challenge len %d", challenge[1]); 1008 vap->iv_stats.is_rx_bad_auth++; 1009 estatus = IEEE80211_STATUS_CHALLENGE; 1010 goto bad; 1011 } 1012 default: 1013 break; 1014 } 1015 if (vap->iv_state != IEEE80211_S_AUTH) 1016 return; 1017 switch (seq) { 1018 case IEEE80211_AUTH_SHARED_PASS: 1019 if (ni->ni_challenge != NULL) { 1020 kfree(ni->ni_challenge, M_80211_NODE); 1021 ni->ni_challenge = NULL; 1022 } 1023 if (status != 0) { 1024 IEEE80211_NOTE_FRAME(vap, 1025 IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, wh, 1026 "shared key auth failed (reason %d)", status); 1027 vap->iv_stats.is_rx_auth_fail++; 1028 vap->iv_stats.is_rx_authfail_code = status; 1029 return; 1030 } 1031 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 1032 break; 1033 case IEEE80211_AUTH_SHARED_CHALLENGE: 1034 if (!ieee80211_alloc_challenge(ni)) 1035 return; 1036 /* XXX could optimize by passing recvd challenge */ 1037 memcpy(ni->ni_challenge, &challenge[2], challenge[1]); 1038 IEEE80211_SEND_MGMT(ni, 1039 IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 1040 break; 1041 default: 1042 IEEE80211_DISCARD(vap, IEEE80211_MSG_AUTH, 1043 wh, "shared key auth", "bad seq %d", seq); 1044 vap->iv_stats.is_rx_bad_auth++; 1045 return; 1046 } 1047 return; 1048 bad: 1049 /* 1050 * Kick the state machine. This short-circuits 1051 * using the mgt frame timeout to trigger the 1052 * state transition. 1053 */ 1054 if (vap->iv_state == IEEE80211_S_AUTH) 1055 ieee80211_new_state(vap, IEEE80211_S_SCAN, 1056 IEEE80211_SCAN_FAIL_STATUS); 1057 } 1058 1059 static int 1060 ieee80211_parse_wmeparams(struct ieee80211vap *vap, uint8_t *frm, 1061 const struct ieee80211_frame *wh) 1062 { 1063 #define MS(_v, _f) (((_v) & _f) >> _f##_S) 1064 struct ieee80211_wme_state *wme = &vap->iv_ic->ic_wme; 1065 u_int len = frm[1], qosinfo; 1066 int i; 1067 1068 if (len < sizeof(struct ieee80211_wme_param)-2) { 1069 IEEE80211_DISCARD_IE(vap, 1070 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WME, 1071 wh, "WME", "too short, len %u", len); 1072 return -1; 1073 } 1074 qosinfo = frm[__offsetof(struct ieee80211_wme_param, param_qosInfo)]; 1075 qosinfo &= WME_QOSINFO_COUNT; 1076 /* XXX do proper check for wraparound */ 1077 if (qosinfo == wme->wme_wmeChanParams.cap_info) 1078 return 0; 1079 frm += __offsetof(struct ieee80211_wme_param, params_acParams); 1080 for (i = 0; i < WME_NUM_AC; i++) { 1081 struct wmeParams *wmep = 1082 &wme->wme_wmeChanParams.cap_wmeParams[i]; 1083 /* NB: ACI not used */ 1084 wmep->wmep_acm = MS(frm[0], WME_PARAM_ACM); 1085 wmep->wmep_aifsn = MS(frm[0], WME_PARAM_AIFSN); 1086 wmep->wmep_logcwmin = MS(frm[1], WME_PARAM_LOGCWMIN); 1087 wmep->wmep_logcwmax = MS(frm[1], WME_PARAM_LOGCWMAX); 1088 wmep->wmep_txopLimit = LE_READ_2(frm+2); 1089 frm += 4; 1090 } 1091 wme->wme_wmeChanParams.cap_info = qosinfo; 1092 return 1; 1093 #undef MS 1094 } 1095 1096 /* 1097 * Process 11h Channel Switch Announcement (CSA) ie. If this 1098 * is the first CSA then initiate the switch. Otherwise we 1099 * track state and trigger completion and/or cancel of the switch. 1100 * XXX should be public for IBSS use 1101 */ 1102 static void 1103 ieee80211_parse_csaparams(struct ieee80211vap *vap, uint8_t *frm, 1104 const struct ieee80211_frame *wh) 1105 { 1106 struct ieee80211com *ic = vap->iv_ic; 1107 const struct ieee80211_csa_ie *csa = 1108 (const struct ieee80211_csa_ie *) frm; 1109 1110 KASSERT(vap->iv_state >= IEEE80211_S_RUN, 1111 ("state %s", ieee80211_state_name[vap->iv_state])); 1112 1113 if (csa->csa_mode > 1) { 1114 IEEE80211_DISCARD_IE(vap, 1115 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1116 wh, "CSA", "invalid mode %u", csa->csa_mode); 1117 return; 1118 } 1119 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 1120 /* 1121 * Convert the channel number to a channel reference. We 1122 * try first to preserve turbo attribute of the current 1123 * channel then fallback. Note this will not work if the 1124 * CSA specifies a channel that requires a band switch (e.g. 1125 * 11a => 11g). This is intentional as 11h is defined only 1126 * for 5GHz/11a and because the switch does not involve a 1127 * reassociation, protocol state (capabilities, negotated 1128 * rates, etc) may/will be wrong. 1129 */ 1130 struct ieee80211_channel *c = 1131 ieee80211_find_channel_byieee(ic, csa->csa_newchan, 1132 (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALLTURBO)); 1133 if (c == NULL) { 1134 c = ieee80211_find_channel_byieee(ic, 1135 csa->csa_newchan, 1136 (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALL)); 1137 if (c == NULL) { 1138 IEEE80211_DISCARD_IE(vap, 1139 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1140 wh, "CSA", "invalid channel %u", 1141 csa->csa_newchan); 1142 goto done; 1143 } 1144 } 1145 #if IEEE80211_CSA_COUNT_MIN > 0 1146 if (csa->csa_count < IEEE80211_CSA_COUNT_MIN) { 1147 /* 1148 * Require at least IEEE80211_CSA_COUNT_MIN count to 1149 * reduce the risk of being redirected by a fabricated 1150 * CSA. If a valid CSA is dropped we'll still get a 1151 * beacon miss when the AP leaves the channel so we'll 1152 * eventually follow to the new channel. 1153 * 1154 * NOTE: this violates the 11h spec that states that 1155 * count may be any value and if 0 then a switch 1156 * should happen asap. 1157 */ 1158 IEEE80211_DISCARD_IE(vap, 1159 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1160 wh, "CSA", "count %u too small, must be >= %u", 1161 csa->csa_count, IEEE80211_CSA_COUNT_MIN); 1162 goto done; 1163 } 1164 #endif 1165 ieee80211_csa_startswitch(ic, c, csa->csa_mode, csa->csa_count); 1166 } else { 1167 /* 1168 * Validate this ie against the initial CSA. We require 1169 * mode and channel not change and the count must be 1170 * monotonically decreasing. This may be pointless and 1171 * canceling the switch as a result may be too paranoid but 1172 * in the worst case if we drop out of CSA because of this 1173 * and the AP does move then we'll just end up taking a 1174 * beacon miss and scan to find the AP. 1175 * 1176 * XXX may want <= on count as we also process ProbeResp 1177 * frames and those may come in w/ the same count as the 1178 * previous beacon; but doing so leaves us open to a stuck 1179 * count until we add a dead-man timer 1180 */ 1181 if (!(csa->csa_count < ic->ic_csa_count && 1182 csa->csa_mode == ic->ic_csa_mode && 1183 csa->csa_newchan == ieee80211_chan2ieee(ic, ic->ic_csa_newchan))) { 1184 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_DOTH, wh, 1185 "CSA ie mismatch, initial ie <%d,%d,%d>, " 1186 "this ie <%d,%d,%d>", ic->ic_csa_mode, 1187 ic->ic_csa_newchan->ic_ieee, ic->ic_csa_count, 1188 csa->csa_mode, csa->csa_newchan, csa->csa_count); 1189 ieee80211_csa_cancelswitch(ic); 1190 } else { 1191 if (csa->csa_count <= 1) 1192 ieee80211_csa_completeswitch(ic); 1193 else 1194 ic->ic_csa_count = csa->csa_count; 1195 } 1196 } 1197 done: 1198 ; 1199 } 1200 1201 /* 1202 * Return non-zero if a background scan may be continued: 1203 * o bg scan is active 1204 * o no channel switch is pending 1205 * o there has not been any traffic recently 1206 * 1207 * Note we do not check if there is an administrative enable; 1208 * this is only done to start the scan. We assume that any 1209 * change in state will be accompanied by a request to cancel 1210 * active scans which will otherwise cause this test to fail. 1211 */ 1212 static __inline int 1213 contbgscan(struct ieee80211vap *vap) 1214 { 1215 struct ieee80211com *ic = vap->iv_ic; 1216 1217 return ((ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN) && 1218 (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && 1219 vap->iv_state == IEEE80211_S_RUN && /* XXX? */ 1220 time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)); 1221 } 1222 1223 /* 1224 * Return non-zero if a backgrond scan may be started: 1225 * o bg scanning is administratively enabled 1226 * o no channel switch is pending 1227 * o we are not boosted on a dynamic turbo channel 1228 * o there has not been a scan recently 1229 * o there has not been any traffic recently 1230 */ 1231 static __inline int 1232 startbgscan(struct ieee80211vap *vap) 1233 { 1234 struct ieee80211com *ic = vap->iv_ic; 1235 1236 return ((vap->iv_flags & IEEE80211_F_BGSCAN) && 1237 (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && 1238 #ifdef IEEE80211_SUPPORT_SUPERG 1239 !IEEE80211_IS_CHAN_DTURBO(ic->ic_curchan) && 1240 #endif 1241 time_after(ticks, ic->ic_lastscan + vap->iv_bgscanintvl) && 1242 time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)); 1243 } 1244 1245 static void 1246 sta_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, 1247 int subtype, int rssi, int nf) 1248 { 1249 #define ISPROBE(_st) ((_st) == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1250 #define ISREASSOC(_st) ((_st) == IEEE80211_FC0_SUBTYPE_REASSOC_RESP) 1251 struct ieee80211vap *vap = ni->ni_vap; 1252 struct ieee80211com *ic = ni->ni_ic; 1253 struct ieee80211_frame *wh; 1254 uint8_t *frm, *efrm; 1255 uint8_t *rates, *xrates, *wme, *htcap, *htinfo; 1256 uint8_t rate; 1257 1258 wh = mtod(m0, struct ieee80211_frame *); 1259 frm = (uint8_t *)&wh[1]; 1260 efrm = mtod(m0, uint8_t *) + m0->m_len; 1261 switch (subtype) { 1262 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1263 case IEEE80211_FC0_SUBTYPE_BEACON: { 1264 struct ieee80211_scanparams scan; 1265 /* 1266 * We process beacon/probe response frames: 1267 * o when scanning, or 1268 * o station mode when associated (to collect state 1269 * updates such as 802.11g slot time) 1270 * Frames otherwise received are discarded. 1271 */ 1272 if (!((ic->ic_flags & IEEE80211_F_SCAN) || ni->ni_associd)) { 1273 vap->iv_stats.is_rx_mgtdiscard++; 1274 return; 1275 } 1276 /* XXX probe response in sta mode when !scanning? */ 1277 if (ieee80211_parse_beacon(ni, m0, &scan) != 0) 1278 return; 1279 /* 1280 * Count frame now that we know it's to be processed. 1281 */ 1282 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1283 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1284 IEEE80211_NODE_STAT(ni, rx_beacons); 1285 } else 1286 IEEE80211_NODE_STAT(ni, rx_proberesp); 1287 /* 1288 * When operating in station mode, check for state updates. 1289 * Be careful to ignore beacons received while doing a 1290 * background scan. We consider only 11g/WMM stuff right now. 1291 */ 1292 if (ni->ni_associd != 0 && 1293 ((ic->ic_flags & IEEE80211_F_SCAN) == 0 || 1294 IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_bssid))) { 1295 /* record tsf of last beacon */ 1296 memcpy(ni->ni_tstamp.data, scan.tstamp, 1297 sizeof(ni->ni_tstamp)); 1298 /* count beacon frame for s/w bmiss handling */ 1299 vap->iv_swbmiss_count++; 1300 vap->iv_bmiss_count = 0; 1301 if (ni->ni_erp != scan.erp) { 1302 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1303 wh->i_addr2, 1304 "erp change: was 0x%x, now 0x%x", 1305 ni->ni_erp, scan.erp); 1306 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1307 (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) 1308 ic->ic_flags |= IEEE80211_F_USEPROT; 1309 else 1310 ic->ic_flags &= ~IEEE80211_F_USEPROT; 1311 ni->ni_erp = scan.erp; 1312 /* XXX statistic */ 1313 /* XXX driver notification */ 1314 } 1315 if ((ni->ni_capinfo ^ scan.capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME) { 1316 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1317 wh->i_addr2, 1318 "capabilities change: was 0x%x, now 0x%x", 1319 ni->ni_capinfo, scan.capinfo); 1320 /* 1321 * NB: we assume short preamble doesn't 1322 * change dynamically 1323 */ 1324 ieee80211_set_shortslottime(ic, 1325 IEEE80211_IS_CHAN_A(ic->ic_bsschan) || 1326 (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1327 ni->ni_capinfo = (ni->ni_capinfo &~ IEEE80211_CAPINFO_SHORT_SLOTTIME) 1328 | (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME); 1329 /* XXX statistic */ 1330 } 1331 if (scan.wme != NULL && 1332 (ni->ni_flags & IEEE80211_NODE_QOS) && 1333 ieee80211_parse_wmeparams(vap, scan.wme, wh) > 0) 1334 ieee80211_wme_updateparams(vap); 1335 #ifdef IEEE80211_SUPPORT_SUPERG 1336 if (scan.ath != NULL) 1337 ieee80211_parse_athparams(ni, scan.ath, wh); 1338 #endif 1339 if (scan.htcap != NULL && scan.htinfo != NULL && 1340 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1341 ieee80211_ht_updateparams(ni, 1342 scan.htcap, scan.htinfo); 1343 /* XXX state changes? */ 1344 } 1345 if (scan.tim != NULL) { 1346 struct ieee80211_tim_ie *tim = 1347 (struct ieee80211_tim_ie *) scan.tim; 1348 #if 0 1349 int aid = IEEE80211_AID(ni->ni_associd); 1350 int ix = aid / NBBY; 1351 int min = tim->tim_bitctl &~ 1; 1352 int max = tim->tim_len + min - 4; 1353 if ((tim->tim_bitctl&1) || 1354 (min <= ix && ix <= max && 1355 isset(tim->tim_bitmap - min, aid))) { 1356 /* 1357 * XXX Do not let bg scan kick off 1358 * we are expecting data. 1359 */ 1360 ic->ic_lastdata = ticks; 1361 ieee80211_sta_pwrsave(vap, 0); 1362 } 1363 #endif 1364 ni->ni_dtim_count = tim->tim_count; 1365 ni->ni_dtim_period = tim->tim_period; 1366 } 1367 if (scan.csa != NULL && 1368 (vap->iv_flags & IEEE80211_F_DOTH)) 1369 ieee80211_parse_csaparams(vap, scan.csa, wh); 1370 else if (ic->ic_flags & IEEE80211_F_CSAPENDING) { 1371 /* 1372 * No CSA ie or 11h disabled, but a channel 1373 * switch is pending; drop out so we aren't 1374 * stuck in CSA state. If the AP really is 1375 * moving we'll get a beacon miss and scan. 1376 */ 1377 ieee80211_csa_cancelswitch(ic); 1378 } 1379 /* 1380 * If scanning, pass the info to the scan module. 1381 * Otherwise, check if it's the right time to do 1382 * a background scan. Background scanning must 1383 * be enabled and we must not be operating in the 1384 * turbo phase of dynamic turbo mode. Then, 1385 * it's been a while since the last background 1386 * scan and if no data frames have come through 1387 * recently, kick off a scan. Note that this 1388 * is the mechanism by which a background scan 1389 * is started _and_ continued each time we 1390 * return on-channel to receive a beacon from 1391 * our ap. 1392 */ 1393 if (ic->ic_flags & IEEE80211_F_SCAN) { 1394 ieee80211_add_scan(vap, &scan, wh, 1395 subtype, rssi, nf); 1396 } else if (contbgscan(vap)) { 1397 ieee80211_bg_scan(vap, 0); 1398 } else if (startbgscan(vap)) { 1399 vap->iv_stats.is_scan_bg++; 1400 #if 0 1401 /* wakeup if we are sleeing */ 1402 ieee80211_set_pwrsave(vap, 0); 1403 #endif 1404 ieee80211_bg_scan(vap, 0); 1405 } 1406 return; 1407 } 1408 /* 1409 * If scanning, just pass information to the scan module. 1410 */ 1411 if (ic->ic_flags & IEEE80211_F_SCAN) { 1412 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1413 /* 1414 * Actively scanning a channel marked passive; 1415 * send a probe request now that we know there 1416 * is 802.11 traffic present. 1417 * 1418 * XXX check if the beacon we recv'd gives 1419 * us what we need and suppress the probe req 1420 */ 1421 ieee80211_probe_curchan(vap, 1); 1422 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1423 } 1424 ieee80211_add_scan(vap, &scan, wh, subtype, rssi, nf); 1425 return; 1426 } 1427 break; 1428 } 1429 1430 case IEEE80211_FC0_SUBTYPE_AUTH: { 1431 uint16_t algo, seq, status; 1432 /* 1433 * auth frame format 1434 * [2] algorithm 1435 * [2] sequence 1436 * [2] status 1437 * [tlv*] challenge 1438 */ 1439 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1440 algo = le16toh(*(uint16_t *)frm); 1441 seq = le16toh(*(uint16_t *)(frm + 2)); 1442 status = le16toh(*(uint16_t *)(frm + 4)); 1443 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2, 1444 "recv auth frame with algorithm %d seq %d", algo, seq); 1445 1446 if (vap->iv_flags & IEEE80211_F_COUNTERM) { 1447 IEEE80211_DISCARD(vap, 1448 IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO, 1449 wh, "auth", "%s", "TKIP countermeasures enabled"); 1450 vap->iv_stats.is_rx_auth_countermeasures++; 1451 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 1452 ieee80211_send_error(ni, wh->i_addr2, 1453 IEEE80211_FC0_SUBTYPE_AUTH, 1454 IEEE80211_REASON_MIC_FAILURE); 1455 } 1456 return; 1457 } 1458 if (algo == IEEE80211_AUTH_ALG_SHARED) 1459 sta_auth_shared(ni, wh, frm + 6, efrm, rssi, nf, 1460 seq, status); 1461 else if (algo == IEEE80211_AUTH_ALG_OPEN) 1462 sta_auth_open(ni, wh, rssi, nf, seq, status); 1463 else { 1464 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1465 wh, "auth", "unsupported alg %d", algo); 1466 vap->iv_stats.is_rx_auth_unsupported++; 1467 return; 1468 } 1469 break; 1470 } 1471 1472 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 1473 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: { 1474 uint16_t capinfo, associd; 1475 uint16_t status; 1476 1477 if (vap->iv_state != IEEE80211_S_ASSOC) { 1478 vap->iv_stats.is_rx_mgtdiscard++; 1479 return; 1480 } 1481 1482 /* 1483 * asresp frame format 1484 * [2] capability information 1485 * [2] status 1486 * [2] association ID 1487 * [tlv] supported rates 1488 * [tlv] extended supported rates 1489 * [tlv] WME 1490 * [tlv] HT capabilities 1491 * [tlv] HT info 1492 */ 1493 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1494 ni = vap->iv_bss; 1495 capinfo = le16toh(*(uint16_t *)frm); 1496 frm += 2; 1497 status = le16toh(*(uint16_t *)frm); 1498 frm += 2; 1499 if (status != 0) { 1500 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1501 wh->i_addr2, "%sassoc failed (reason %d)", 1502 ISREASSOC(subtype) ? "re" : "", status); 1503 vap->iv_stats.is_rx_auth_fail++; /* XXX */ 1504 return; 1505 } 1506 associd = le16toh(*(uint16_t *)frm); 1507 frm += 2; 1508 1509 rates = xrates = wme = htcap = htinfo = NULL; 1510 while (efrm - frm > 1) { 1511 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1512 switch (*frm) { 1513 case IEEE80211_ELEMID_RATES: 1514 rates = frm; 1515 break; 1516 case IEEE80211_ELEMID_XRATES: 1517 xrates = frm; 1518 break; 1519 case IEEE80211_ELEMID_HTCAP: 1520 htcap = frm; 1521 break; 1522 case IEEE80211_ELEMID_HTINFO: 1523 htinfo = frm; 1524 break; 1525 case IEEE80211_ELEMID_VENDOR: 1526 if (iswmeoui(frm)) 1527 wme = frm; 1528 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) { 1529 /* 1530 * Accept pre-draft HT ie's if the 1531 * standard ones have not been seen. 1532 */ 1533 if (ishtcapoui(frm)) { 1534 if (htcap == NULL) 1535 htcap = frm; 1536 } else if (ishtinfooui(frm)) { 1537 if (htinfo == NULL) 1538 htcap = frm; 1539 } 1540 } 1541 /* XXX Atheros OUI support */ 1542 break; 1543 } 1544 frm += frm[1] + 2; 1545 } 1546 1547 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1548 if (xrates != NULL) 1549 IEEE80211_VERIFY_ELEMENT(xrates, 1550 IEEE80211_RATE_MAXSIZE - rates[1], return); 1551 rate = ieee80211_setup_rates(ni, rates, xrates, 1552 IEEE80211_F_JOIN | 1553 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1554 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1555 if (rate & IEEE80211_RATE_BASIC) { 1556 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1557 wh->i_addr2, 1558 "%sassoc failed (rate set mismatch)", 1559 ISREASSOC(subtype) ? "re" : ""); 1560 vap->iv_stats.is_rx_assoc_norate++; 1561 ieee80211_new_state(vap, IEEE80211_S_SCAN, 1562 IEEE80211_SCAN_FAIL_STATUS); 1563 return; 1564 } 1565 1566 ni->ni_capinfo = capinfo; 1567 ni->ni_associd = associd; 1568 if (ni->ni_jointime == 0) 1569 ni->ni_jointime = time_second; 1570 if (wme != NULL && 1571 ieee80211_parse_wmeparams(vap, wme, wh) >= 0) { 1572 ni->ni_flags |= IEEE80211_NODE_QOS; 1573 ieee80211_wme_updateparams(vap); 1574 } else 1575 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1576 /* 1577 * Setup HT state according to the negotiation. 1578 * 1579 * NB: shouldn't need to check if HT use is enabled but some 1580 * ap's send back HT ie's even when we don't indicate we 1581 * are HT capable in our AssocReq. 1582 */ 1583 if (htcap != NULL && htinfo != NULL && 1584 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1585 ieee80211_ht_node_init(ni); 1586 ieee80211_ht_updateparams(ni, htcap, htinfo); 1587 ieee80211_setup_htrates(ni, htcap, 1588 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1589 ieee80211_setup_basic_htrates(ni, htinfo); 1590 ieee80211_node_setuptxparms(ni); 1591 } else { 1592 #ifdef IEEE80211_SUPPORT_SUPERG 1593 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_ATH)) 1594 ieee80211_ff_node_init(ni); 1595 #endif 1596 } 1597 /* 1598 * Configure state now that we are associated. 1599 * 1600 * XXX may need different/additional driver callbacks? 1601 */ 1602 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) || 1603 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1604 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 1605 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 1606 } else { 1607 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 1608 ic->ic_flags |= IEEE80211_F_USEBARKER; 1609 } 1610 ieee80211_set_shortslottime(ic, 1611 IEEE80211_IS_CHAN_A(ic->ic_curchan) || 1612 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1613 /* 1614 * Honor ERP protection. 1615 * 1616 * NB: ni_erp should zero for non-11g operation. 1617 */ 1618 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1619 (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) 1620 ic->ic_flags |= IEEE80211_F_USEPROT; 1621 else 1622 ic->ic_flags &= ~IEEE80211_F_USEPROT; 1623 IEEE80211_NOTE_MAC(vap, 1624 IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, wh->i_addr2, 1625 "%sassoc success at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 1626 ISREASSOC(subtype) ? "re" : "", 1627 IEEE80211_NODE_AID(ni), 1628 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 1629 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 1630 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "", 1631 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 1632 ni->ni_flags & IEEE80211_NODE_HT ? 1633 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 1634 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 1635 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 1636 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 1637 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 1638 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 1639 ", fast-frames" : "", 1640 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 1641 ", turbo" : "" 1642 ); 1643 ieee80211_new_state(vap, IEEE80211_S_RUN, subtype); 1644 break; 1645 } 1646 1647 case IEEE80211_FC0_SUBTYPE_DEAUTH: { 1648 uint16_t reason; 1649 1650 if (vap->iv_state == IEEE80211_S_SCAN) { 1651 vap->iv_stats.is_rx_mgtdiscard++; 1652 return; 1653 } 1654 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 1655 /* NB: can happen when in promiscuous mode */ 1656 vap->iv_stats.is_rx_mgtdiscard++; 1657 break; 1658 } 1659 1660 /* 1661 * deauth frame format 1662 * [2] reason 1663 */ 1664 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 1665 reason = le16toh(*(uint16_t *)frm); 1666 1667 vap->iv_stats.is_rx_deauth++; 1668 vap->iv_stats.is_rx_deauth_code = reason; 1669 IEEE80211_NODE_STAT(ni, rx_deauth); 1670 1671 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 1672 "recv deauthenticate (reason %d)", reason); 1673 ieee80211_new_state(vap, IEEE80211_S_AUTH, 1674 (reason << 8) | IEEE80211_FC0_SUBTYPE_DEAUTH); 1675 break; 1676 } 1677 1678 case IEEE80211_FC0_SUBTYPE_DISASSOC: { 1679 uint16_t reason; 1680 1681 if (vap->iv_state != IEEE80211_S_RUN && 1682 vap->iv_state != IEEE80211_S_ASSOC && 1683 vap->iv_state != IEEE80211_S_AUTH) { 1684 vap->iv_stats.is_rx_mgtdiscard++; 1685 return; 1686 } 1687 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 1688 /* NB: can happen when in promiscuous mode */ 1689 vap->iv_stats.is_rx_mgtdiscard++; 1690 break; 1691 } 1692 1693 /* 1694 * disassoc frame format 1695 * [2] reason 1696 */ 1697 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 1698 reason = le16toh(*(uint16_t *)frm); 1699 1700 vap->iv_stats.is_rx_disassoc++; 1701 vap->iv_stats.is_rx_disassoc_code = reason; 1702 IEEE80211_NODE_STAT(ni, rx_disassoc); 1703 1704 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 1705 "recv disassociate (reason %d)", reason); 1706 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 1707 break; 1708 } 1709 1710 case IEEE80211_FC0_SUBTYPE_ACTION: 1711 if (vap->iv_state == IEEE80211_S_RUN) { 1712 if (ieee80211_parse_action(ni, m0) == 0) 1713 ic->ic_recv_action(ni, wh, frm, efrm); 1714 } else 1715 vap->iv_stats.is_rx_mgtdiscard++; 1716 break; 1717 1718 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1719 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1720 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 1721 vap->iv_stats.is_rx_mgtdiscard++; 1722 return; 1723 default: 1724 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1725 wh, "mgt", "subtype 0x%x not handled", subtype); 1726 vap->iv_stats.is_rx_badsubtype++; 1727 break; 1728 } 1729 #undef ISREASSOC 1730 #undef ISPROBE 1731 } 1732 1733 static void 1734 sta_recv_ctl(struct ieee80211_node *ni, struct mbuf *m0, int subtype) 1735 { 1736 } 1737