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 26 #include <sys/cdefs.h> 27 #ifdef __FreeBSD__ 28 __FBSDID("$FreeBSD$"); 29 #endif 30 31 /* 32 * IEEE 802.11 Station mode support. 33 */ 34 #include "opt_inet.h" 35 #include "opt_wlan.h" 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/mbuf.h> 40 #include <sys/malloc.h> 41 #include <sys/kernel.h> 42 43 #include <sys/socket.h> 44 #include <sys/sockio.h> 45 #include <sys/endian.h> 46 #include <sys/errno.h> 47 #include <sys/proc.h> 48 #include <sys/sysctl.h> 49 50 #include <net/if.h> 51 #include <net/if_media.h> 52 #include <net/if_llc.h> 53 #include <net/ethernet.h> 54 55 #include <net/bpf.h> 56 57 #include <net80211/ieee80211_var.h> 58 #include <net80211/ieee80211_sta.h> 59 #include <net80211/ieee80211_input.h> 60 #ifdef IEEE80211_SUPPORT_SUPERG 61 #include <net80211/ieee80211_superg.h> 62 #endif 63 64 #define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2) 65 66 static void sta_vattach(struct ieee80211vap *); 67 static void sta_beacon_miss(struct ieee80211vap *); 68 static int sta_newstate(struct ieee80211vap *, enum ieee80211_state, int); 69 static int sta_input(struct ieee80211_node *, struct mbuf *, int, int); 70 static void sta_recv_mgmt(struct ieee80211_node *, struct mbuf *, 71 int subtype, int rssi, int nf); 72 static void sta_recv_ctl(struct ieee80211_node *, struct mbuf *, int subtype); 73 74 void 75 ieee80211_sta_attach(struct ieee80211com *ic) 76 { 77 ic->ic_vattach[IEEE80211_M_STA] = sta_vattach; 78 } 79 80 void 81 ieee80211_sta_detach(struct ieee80211com *ic) 82 { 83 } 84 85 static void 86 sta_vdetach(struct ieee80211vap *vap) 87 { 88 } 89 90 static void 91 sta_vattach(struct ieee80211vap *vap) 92 { 93 vap->iv_newstate = sta_newstate; 94 vap->iv_input = sta_input; 95 vap->iv_recv_mgmt = sta_recv_mgmt; 96 vap->iv_recv_ctl = sta_recv_ctl; 97 vap->iv_opdetach = sta_vdetach; 98 vap->iv_bmiss = sta_beacon_miss; 99 } 100 101 /* 102 * Handle a beacon miss event. The common code filters out 103 * spurious events that can happen when scanning and/or before 104 * reaching RUN state. 105 */ 106 static void 107 sta_beacon_miss(struct ieee80211vap *vap) 108 { 109 struct ieee80211com *ic = vap->iv_ic; 110 111 KASSERT((ic->ic_flags & IEEE80211_F_SCAN) == 0, ("scanning")); 112 KASSERT(vap->iv_state >= IEEE80211_S_RUN, 113 ("wrong state %s", ieee80211_state_name[vap->iv_state])); 114 115 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 116 "beacon miss, mode %s state %s\n", 117 ieee80211_opmode_name[vap->iv_opmode], 118 ieee80211_state_name[vap->iv_state]); 119 120 if (vap->iv_state == IEEE80211_S_CSA) { 121 /* 122 * A Channel Switch is pending; assume we missed the 123 * beacon that would've completed the process and just 124 * force the switch. If we made a mistake we'll not 125 * find the AP on the new channel and fall back to a 126 * normal scan. 127 */ 128 ieee80211_csa_completeswitch(ic); 129 return; 130 } 131 if (++vap->iv_bmiss_count < vap->iv_bmiss_max) { 132 /* 133 * Send a directed probe req before falling back to a 134 * scan; if we receive a response ic_bmiss_count will 135 * be reset. Some cards mistakenly report beacon miss 136 * so this avoids the expensive scan if the ap is 137 * still there. 138 */ 139 ieee80211_send_probereq(vap->iv_bss, vap->iv_myaddr, 140 vap->iv_bss->ni_bssid, vap->iv_bss->ni_bssid, 141 vap->iv_bss->ni_essid, vap->iv_bss->ni_esslen); 142 return; 143 } 144 vap->iv_bmiss_count = 0; 145 vap->iv_stats.is_beacon_miss++; 146 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 147 #ifdef IEEE80211_SUPPORT_SUPERG 148 struct ieee80211com *ic = vap->iv_ic; 149 150 /* 151 * If we receive a beacon miss interrupt when using 152 * dynamic turbo, attempt to switch modes before 153 * reassociating. 154 */ 155 if (IEEE80211_ATH_CAP(vap, vap->iv_bss, IEEE80211_NODE_TURBOP)) 156 ieee80211_dturbo_switch(vap, 157 ic->ic_bsschan->ic_flags ^ IEEE80211_CHAN_TURBO); 158 #endif 159 /* 160 * Try to reassociate before scanning for a new ap. 161 */ 162 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 163 } else { 164 /* 165 * Somebody else is controlling state changes (e.g. 166 * a user-mode app) don't do anything that would 167 * confuse them; just drop into scan mode so they'll 168 * notified of the state change and given control. 169 */ 170 ieee80211_new_state(vap, IEEE80211_S_SCAN, 0); 171 } 172 } 173 174 /* 175 * Handle deauth with reason. We retry only for 176 * the cases where we might succeed. Otherwise 177 * we downgrade the ap and scan. 178 */ 179 static void 180 sta_authretry(struct ieee80211vap *vap, struct ieee80211_node *ni, int reason) 181 { 182 switch (reason) { 183 case IEEE80211_STATUS_SUCCESS: /* NB: MLME assoc */ 184 case IEEE80211_STATUS_TIMEOUT: 185 case IEEE80211_REASON_ASSOC_EXPIRE: 186 case IEEE80211_REASON_NOT_AUTHED: 187 case IEEE80211_REASON_NOT_ASSOCED: 188 case IEEE80211_REASON_ASSOC_LEAVE: 189 case IEEE80211_REASON_ASSOC_NOT_AUTHED: 190 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, 1); 191 break; 192 default: 193 ieee80211_scan_assoc_fail(vap, vap->iv_bss->ni_macaddr, reason); 194 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 195 ieee80211_check_scan_current(vap); 196 break; 197 } 198 } 199 200 /* 201 * IEEE80211_M_STA vap state machine handler. 202 * This routine handles the main states in the 802.11 protocol. 203 */ 204 static int 205 sta_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 206 { 207 struct ieee80211com *ic = vap->iv_ic; 208 struct ieee80211_node *ni; 209 enum ieee80211_state ostate; 210 211 IEEE80211_LOCK_ASSERT(ic); 212 213 ostate = vap->iv_state; 214 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 215 __func__, ieee80211_state_name[ostate], 216 ieee80211_state_name[nstate], arg); 217 vap->iv_state = nstate; /* state transition */ 218 callout_stop(&vap->iv_mgtsend); /* XXX callout_drain */ 219 if (ostate != IEEE80211_S_SCAN) 220 ieee80211_cancel_scan(vap); /* background scan */ 221 ni = vap->iv_bss; /* NB: no reference held */ 222 if (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS) 223 callout_stop(&vap->iv_swbmiss); 224 switch (nstate) { 225 case IEEE80211_S_INIT: 226 switch (ostate) { 227 case IEEE80211_S_SLEEP: 228 /* XXX wakeup */ 229 case IEEE80211_S_RUN: 230 IEEE80211_SEND_MGMT(ni, 231 IEEE80211_FC0_SUBTYPE_DISASSOC, 232 IEEE80211_REASON_ASSOC_LEAVE); 233 ieee80211_sta_leave(ni); 234 break; 235 case IEEE80211_S_ASSOC: 236 IEEE80211_SEND_MGMT(ni, 237 IEEE80211_FC0_SUBTYPE_DEAUTH, 238 IEEE80211_REASON_AUTH_LEAVE); 239 break; 240 case IEEE80211_S_SCAN: 241 ieee80211_cancel_scan(vap); 242 break; 243 default: 244 goto invalid; 245 } 246 if (ostate != IEEE80211_S_INIT) { 247 /* NB: optimize INIT -> INIT case */ 248 ieee80211_reset_bss(vap); 249 } 250 if (vap->iv_auth->ia_detach != NULL) 251 vap->iv_auth->ia_detach(vap); 252 break; 253 case IEEE80211_S_SCAN: 254 switch (ostate) { 255 case IEEE80211_S_INIT: 256 /* 257 * Initiate a scan. We can come here as a result 258 * of an IEEE80211_IOC_SCAN_REQ too in which case 259 * the vap will be marked with IEEE80211_FEXT_SCANREQ 260 * and the scan request parameters will be present 261 * in iv_scanreq. Otherwise we do the default. 262 */ 263 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 264 ieee80211_check_scan(vap, 265 vap->iv_scanreq_flags, 266 vap->iv_scanreq_duration, 267 vap->iv_scanreq_mindwell, 268 vap->iv_scanreq_maxdwell, 269 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 270 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 271 } else 272 ieee80211_check_scan_current(vap); 273 break; 274 case IEEE80211_S_SCAN: 275 case IEEE80211_S_AUTH: 276 case IEEE80211_S_ASSOC: 277 /* 278 * These can happen either because of a timeout 279 * on an assoc/auth response or because of a 280 * change in state that requires a reset. For 281 * the former we're called with a non-zero arg 282 * that is the cause for the failure; pass this 283 * to the scan code so it can update state. 284 * Otherwise trigger a new scan unless we're in 285 * manual roaming mode in which case an application 286 * must issue an explicit scan request. 287 */ 288 if (arg != 0) 289 ieee80211_scan_assoc_fail(vap, 290 vap->iv_bss->ni_macaddr, arg); 291 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 292 ieee80211_check_scan_current(vap); 293 break; 294 case IEEE80211_S_RUN: /* beacon miss */ 295 /* 296 * Beacon miss. Notify user space and if not 297 * under control of a user application (roaming 298 * manual) kick off a scan to re-connect. 299 */ 300 ieee80211_sta_leave(ni); 301 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 302 ieee80211_check_scan_current(vap); 303 break; 304 default: 305 goto invalid; 306 } 307 break; 308 case IEEE80211_S_AUTH: 309 switch (ostate) { 310 case IEEE80211_S_INIT: 311 case IEEE80211_S_SCAN: 312 IEEE80211_SEND_MGMT(ni, 313 IEEE80211_FC0_SUBTYPE_AUTH, 1); 314 break; 315 case IEEE80211_S_AUTH: 316 case IEEE80211_S_ASSOC: 317 switch (arg & 0xff) { 318 case IEEE80211_FC0_SUBTYPE_AUTH: 319 /* ??? */ 320 IEEE80211_SEND_MGMT(ni, 321 IEEE80211_FC0_SUBTYPE_AUTH, 2); 322 break; 323 case IEEE80211_FC0_SUBTYPE_DEAUTH: 324 sta_authretry(vap, ni, arg>>8); 325 break; 326 } 327 break; 328 case IEEE80211_S_RUN: 329 switch (arg & 0xff) { 330 case IEEE80211_FC0_SUBTYPE_AUTH: 331 IEEE80211_SEND_MGMT(ni, 332 IEEE80211_FC0_SUBTYPE_AUTH, 2); 333 vap->iv_state = ostate; /* stay RUN */ 334 break; 335 case IEEE80211_FC0_SUBTYPE_DEAUTH: 336 ieee80211_sta_leave(ni); 337 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 338 /* try to reauth */ 339 IEEE80211_SEND_MGMT(ni, 340 IEEE80211_FC0_SUBTYPE_AUTH, 1); 341 } 342 break; 343 } 344 break; 345 default: 346 goto invalid; 347 } 348 break; 349 case IEEE80211_S_ASSOC: 350 switch (ostate) { 351 case IEEE80211_S_AUTH: 352 case IEEE80211_S_ASSOC: 353 IEEE80211_SEND_MGMT(ni, 354 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 355 break; 356 case IEEE80211_S_SLEEP: /* cannot happen */ 357 case IEEE80211_S_RUN: 358 ieee80211_sta_leave(ni); 359 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 360 IEEE80211_SEND_MGMT(ni, arg ? 361 IEEE80211_FC0_SUBTYPE_REASSOC_REQ : 362 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 363 } 364 break; 365 default: 366 goto invalid; 367 } 368 break; 369 case IEEE80211_S_RUN: 370 if (vap->iv_flags & IEEE80211_F_WPA) { 371 /* XXX validate prerequisites */ 372 } 373 switch (ostate) { 374 case IEEE80211_S_RUN: 375 case IEEE80211_S_CSA: 376 break; 377 case IEEE80211_S_AUTH: /* when join is done in fw */ 378 case IEEE80211_S_ASSOC: 379 #ifdef IEEE80211_DEBUG 380 if (ieee80211_msg_debug(vap)) { 381 ieee80211_note(vap, "%s with %s ssid ", 382 (vap->iv_opmode == IEEE80211_M_STA ? 383 "associated" : "synchronized"), 384 ether_sprintf(ni->ni_bssid)); 385 ieee80211_print_essid(vap->iv_bss->ni_essid, 386 ni->ni_esslen); 387 /* XXX MCS/HT */ 388 printf(" channel %d start %uMb\n", 389 ieee80211_chan2ieee(ic, ic->ic_curchan), 390 IEEE80211_RATE2MBS(ni->ni_txrate)); 391 } 392 #endif 393 ieee80211_scan_assoc_success(vap, ni->ni_macaddr); 394 ieee80211_notify_node_join(ni, 395 arg == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 396 break; 397 case IEEE80211_S_SLEEP: 398 ieee80211_sta_pwrsave(vap, 0); 399 break; 400 default: 401 goto invalid; 402 } 403 ieee80211_sync_curchan(ic); 404 if (ostate != IEEE80211_S_RUN && 405 (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS)) { 406 /* 407 * Start s/w beacon miss timer for devices w/o 408 * hardware support. We fudge a bit here since 409 * we're doing this in software. 410 */ 411 vap->iv_swbmiss_period = IEEE80211_TU_TO_TICKS( 412 2 * vap->iv_bmissthreshold * ni->ni_intval); 413 vap->iv_swbmiss_count = 0; 414 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, 415 ieee80211_swbmiss, vap); 416 } 417 /* 418 * When 802.1x is not in use mark the port authorized 419 * at this point so traffic can flow. 420 */ 421 if (ni->ni_authmode != IEEE80211_AUTH_8021X) 422 ieee80211_node_authorize(ni); 423 /* 424 * Fake association when joining an existing bss. 425 */ 426 if (ic->ic_newassoc != NULL) 427 ic->ic_newassoc(vap->iv_bss, ostate != IEEE80211_S_RUN); 428 break; 429 case IEEE80211_S_CSA: 430 if (ostate != IEEE80211_S_RUN) 431 goto invalid; 432 break; 433 case IEEE80211_S_SLEEP: 434 ieee80211_sta_pwrsave(vap, 1); 435 break; 436 default: 437 invalid: 438 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 439 "%s: unexpected state transition %s -> %s\n", __func__, 440 ieee80211_state_name[ostate], ieee80211_state_name[nstate]); 441 break; 442 } 443 return 0; 444 } 445 446 /* 447 * Return non-zero if the frame is an echo of a multicast 448 * frame sent by ourself. The dir is known to be DSTODS. 449 */ 450 static __inline int 451 isdstods_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh) 452 { 453 #define QWH4(wh) ((const struct ieee80211_qosframe_addr4 *)wh) 454 #define WH4(wh) ((const struct ieee80211_frame_addr4 *)wh) 455 const uint8_t *sa; 456 457 KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode")); 458 459 if (!IEEE80211_IS_MULTICAST(wh->i_addr3)) 460 return 0; 461 sa = IEEE80211_QOS_HAS_SEQ(wh) ? QWH4(wh)->i_addr4 : WH4(wh)->i_addr4; 462 return IEEE80211_ADDR_EQ(sa, vap->iv_myaddr); 463 #undef WH4 464 #undef QWH4 465 } 466 467 /* 468 * Return non-zero if the frame is an echo of a multicast 469 * frame sent by ourself. The dir is known to be FROMDS. 470 */ 471 static __inline int 472 isfromds_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh) 473 { 474 KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode")); 475 476 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) 477 return 0; 478 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 479 } 480 481 /* 482 * Decide if a received management frame should be 483 * printed when debugging is enabled. This filters some 484 * of the less interesting frames that come frequently 485 * (e.g. beacons). 486 */ 487 static __inline int 488 doprint(struct ieee80211vap *vap, int subtype) 489 { 490 switch (subtype) { 491 case IEEE80211_FC0_SUBTYPE_BEACON: 492 return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN); 493 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 494 return 0; 495 } 496 return 1; 497 } 498 499 /* 500 * Process a received frame. The node associated with the sender 501 * should be supplied. If nothing was found in the node table then 502 * the caller is assumed to supply a reference to iv_bss instead. 503 * The RSSI and a timestamp are also supplied. The RSSI data is used 504 * during AP scanning to select a AP to associate with; it can have 505 * any units so long as values have consistent units and higher values 506 * mean ``better signal''. The receive timestamp is currently not used 507 * by the 802.11 layer. 508 */ 509 static int 510 sta_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf) 511 { 512 #define SEQ_LEQ(a,b) ((int)((a)-(b)) <= 0) 513 #define HAS_SEQ(type) ((type & 0x4) == 0) 514 struct ieee80211vap *vap = ni->ni_vap; 515 struct ieee80211com *ic = ni->ni_ic; 516 struct ifnet *ifp = vap->iv_ifp; 517 struct ieee80211_frame *wh; 518 struct ieee80211_key *key; 519 struct ether_header *eh; 520 int hdrspace, need_tap = 1; /* mbuf need to be tapped. */ 521 uint8_t dir, type, subtype, qos; 522 uint8_t *bssid; 523 uint16_t rxseq; 524 525 if (m->m_flags & M_AMPDU_MPDU) { 526 /* 527 * Fastpath for A-MPDU reorder q resubmission. Frames 528 * w/ M_AMPDU_MPDU marked have already passed through 529 * here but were received out of order and been held on 530 * the reorder queue. When resubmitted they are marked 531 * with the M_AMPDU_MPDU flag and we can bypass most of 532 * the normal processing. 533 */ 534 wh = mtod(m, struct ieee80211_frame *); 535 type = IEEE80211_FC0_TYPE_DATA; 536 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 537 subtype = IEEE80211_FC0_SUBTYPE_QOS; 538 hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ 539 goto resubmit_ampdu; 540 } 541 542 KASSERT(ni != NULL, ("null node")); 543 ni->ni_inact = ni->ni_inact_reload; 544 545 type = -1; /* undefined */ 546 547 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 548 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 549 ni->ni_macaddr, NULL, 550 "too short (1): len %u", m->m_pkthdr.len); 551 vap->iv_stats.is_rx_tooshort++; 552 goto out; 553 } 554 /* 555 * Bit of a cheat here, we use a pointer for a 3-address 556 * frame format but don't reference fields past outside 557 * ieee80211_frame_min w/o first validating the data is 558 * present. 559 */ 560 wh = mtod(m, struct ieee80211_frame *); 561 562 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 563 IEEE80211_FC0_VERSION_0) { 564 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 565 ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x", 566 wh->i_fc[0], wh->i_fc[1]); 567 vap->iv_stats.is_rx_badversion++; 568 goto err; 569 } 570 571 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 572 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 573 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 574 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 575 bssid = wh->i_addr2; 576 if (!IEEE80211_ADDR_EQ(bssid, ni->ni_bssid)) { 577 /* not interested in */ 578 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 579 bssid, NULL, "%s", "not to bss"); 580 vap->iv_stats.is_rx_wrongbss++; 581 goto out; 582 } 583 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 584 ni->ni_noise = nf; 585 if (HAS_SEQ(type)) { 586 uint8_t tid = ieee80211_gettid(wh); 587 if (IEEE80211_QOS_HAS_SEQ(wh) && 588 TID_TO_WME_AC(tid) >= WME_AC_VI) 589 ic->ic_wme.wme_hipri_traffic++; 590 rxseq = le16toh(*(uint16_t *)wh->i_seq); 591 if ((ni->ni_flags & IEEE80211_NODE_HT) == 0 && 592 (wh->i_fc[1] & IEEE80211_FC1_RETRY) && 593 SEQ_LEQ(rxseq, ni->ni_rxseqs[tid])) { 594 /* duplicate, discard */ 595 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 596 bssid, "duplicate", 597 "seqno <%u,%u> fragno <%u,%u> tid %u", 598 rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 599 ni->ni_rxseqs[tid] >> 600 IEEE80211_SEQ_SEQ_SHIFT, 601 rxseq & IEEE80211_SEQ_FRAG_MASK, 602 ni->ni_rxseqs[tid] & 603 IEEE80211_SEQ_FRAG_MASK, 604 tid); 605 vap->iv_stats.is_rx_dup++; 606 IEEE80211_NODE_STAT(ni, rx_dup); 607 goto out; 608 } 609 ni->ni_rxseqs[tid] = rxseq; 610 } 611 } 612 613 switch (type) { 614 case IEEE80211_FC0_TYPE_DATA: 615 hdrspace = ieee80211_hdrspace(ic, wh); 616 if (m->m_len < hdrspace && 617 (m = m_pullup(m, hdrspace)) == NULL) { 618 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 619 ni->ni_macaddr, NULL, 620 "data too short: expecting %u", hdrspace); 621 vap->iv_stats.is_rx_tooshort++; 622 goto out; /* XXX */ 623 } 624 /* 625 * Handle A-MPDU re-ordering. If the frame is to be 626 * processed directly then ieee80211_ampdu_reorder 627 * will return 0; otherwise it has consumed the mbuf 628 * and we should do nothing more with it. 629 */ 630 if ((m->m_flags & M_AMPDU) && 631 (dir == IEEE80211_FC1_DIR_FROMDS || 632 dir == IEEE80211_FC1_DIR_DSTODS) && 633 ieee80211_ampdu_reorder(ni, m) != 0) { 634 m = NULL; 635 goto out; 636 } 637 resubmit_ampdu: 638 if (dir == IEEE80211_FC1_DIR_FROMDS) { 639 if ((ifp->if_flags & IFF_SIMPLEX) && 640 isfromds_mcastecho(vap, wh)) { 641 /* 642 * In IEEE802.11 network, multicast 643 * packets sent from "me" are broadcast 644 * from the AP; silently discard for 645 * SIMPLEX interface. 646 */ 647 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 648 wh, "data", "%s", "multicast echo"); 649 vap->iv_stats.is_rx_mcastecho++; 650 goto out; 651 } 652 if ((vap->iv_flags & IEEE80211_F_DWDS) && 653 IEEE80211_IS_MULTICAST(wh->i_addr1)) { 654 /* 655 * DWDS sta's must drop 3-address mcast frames 656 * as they will be sent separately as a 4-addr 657 * frame. Accepting the 3-addr frame will 658 * confuse the bridge into thinking the sending 659 * sta is located at the end of WDS link. 660 */ 661 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 662 "3-address data", "%s", "DWDS enabled"); 663 vap->iv_stats.is_rx_mcastecho++; 664 goto out; 665 } 666 } else if (dir == IEEE80211_FC1_DIR_DSTODS) { 667 if ((vap->iv_flags & IEEE80211_F_DWDS) == 0) { 668 IEEE80211_DISCARD(vap, 669 IEEE80211_MSG_INPUT, wh, "4-address data", 670 "%s", "DWDS not enabled"); 671 vap->iv_stats.is_rx_wrongdir++; 672 goto out; 673 } 674 if ((ifp->if_flags & IFF_SIMPLEX) && 675 isdstods_mcastecho(vap, wh)) { 676 /* 677 * In IEEE802.11 network, multicast 678 * packets sent from "me" are broadcast 679 * from the AP; silently discard for 680 * SIMPLEX interface. 681 */ 682 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 683 "4-address data", "%s", "multicast echo"); 684 vap->iv_stats.is_rx_mcastecho++; 685 goto out; 686 } 687 } else { 688 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 689 "data", "incorrect dir 0x%x", dir); 690 vap->iv_stats.is_rx_wrongdir++; 691 goto out; 692 } 693 694 /* 695 * Handle privacy requirements. Note that we 696 * must not be preempted from here until after 697 * we (potentially) call ieee80211_crypto_demic; 698 * otherwise we may violate assumptions in the 699 * crypto cipher modules used to do delayed update 700 * of replay sequence numbers. 701 */ 702 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 703 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 704 /* 705 * Discard encrypted frames when privacy is off. 706 */ 707 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 708 wh, "WEP", "%s", "PRIVACY off"); 709 vap->iv_stats.is_rx_noprivacy++; 710 IEEE80211_NODE_STAT(ni, rx_noprivacy); 711 goto out; 712 } 713 key = ieee80211_crypto_decap(ni, m, hdrspace); 714 if (key == NULL) { 715 /* NB: stats+msgs handled in crypto_decap */ 716 IEEE80211_NODE_STAT(ni, rx_wepfail); 717 goto out; 718 } 719 wh = mtod(m, struct ieee80211_frame *); 720 wh->i_fc[1] &= ~IEEE80211_FC1_WEP; 721 } else { 722 /* XXX M_WEP and IEEE80211_F_PRIVACY */ 723 key = NULL; 724 } 725 726 /* 727 * Save QoS bits for use below--before we strip the header. 728 */ 729 if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { 730 qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? 731 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : 732 ((struct ieee80211_qosframe *)wh)->i_qos[0]; 733 } else 734 qos = 0; 735 736 /* 737 * Next up, any fragmentation. 738 */ 739 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 740 m = ieee80211_defrag(ni, m, hdrspace); 741 if (m == NULL) { 742 /* Fragment dropped or frame not complete yet */ 743 goto out; 744 } 745 } 746 wh = NULL; /* no longer valid, catch any uses */ 747 748 /* 749 * Next strip any MSDU crypto bits. 750 */ 751 if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) { 752 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 753 ni->ni_macaddr, "data", "%s", "demic error"); 754 vap->iv_stats.is_rx_demicfail++; 755 IEEE80211_NODE_STAT(ni, rx_demicfail); 756 goto out; 757 } 758 759 /* copy to listener after decrypt */ 760 if (ieee80211_radiotap_active_vap(vap)) 761 ieee80211_radiotap_rx(vap, m); 762 need_tap = 0; 763 764 /* 765 * Finally, strip the 802.11 header. 766 */ 767 m = ieee80211_decap(vap, m, hdrspace); 768 if (m == NULL) { 769 /* XXX mask bit to check for both */ 770 /* don't count Null data frames as errors */ 771 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 772 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 773 goto out; 774 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 775 ni->ni_macaddr, "data", "%s", "decap error"); 776 vap->iv_stats.is_rx_decap++; 777 IEEE80211_NODE_STAT(ni, rx_decap); 778 goto err; 779 } 780 eh = mtod(m, struct ether_header *); 781 if (!ieee80211_node_is_authorized(ni)) { 782 /* 783 * Deny any non-PAE frames received prior to 784 * authorization. For open/shared-key 785 * authentication the port is mark authorized 786 * after authentication completes. For 802.1x 787 * the port is not marked authorized by the 788 * authenticator until the handshake has completed. 789 */ 790 if (eh->ether_type != htons(ETHERTYPE_PAE)) { 791 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 792 eh->ether_shost, "data", 793 "unauthorized port: ether type 0x%x len %u", 794 eh->ether_type, m->m_pkthdr.len); 795 vap->iv_stats.is_rx_unauth++; 796 IEEE80211_NODE_STAT(ni, rx_unauth); 797 goto err; 798 } 799 } else { 800 /* 801 * When denying unencrypted frames, discard 802 * any non-PAE frames received without encryption. 803 */ 804 if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && 805 (key == NULL && (m->m_flags & M_WEP) == 0) && 806 eh->ether_type != htons(ETHERTYPE_PAE)) { 807 /* 808 * Drop unencrypted frames. 809 */ 810 vap->iv_stats.is_rx_unencrypted++; 811 IEEE80211_NODE_STAT(ni, rx_unencrypted); 812 goto out; 813 } 814 } 815 /* XXX require HT? */ 816 if (qos & IEEE80211_QOS_AMSDU) { 817 m = ieee80211_decap_amsdu(ni, m); 818 if (m == NULL) 819 return IEEE80211_FC0_TYPE_DATA; 820 } else { 821 #ifdef IEEE80211_SUPPORT_SUPERG 822 m = ieee80211_decap_fastframe(vap, ni, m); 823 if (m == NULL) 824 return IEEE80211_FC0_TYPE_DATA; 825 #endif 826 } 827 ieee80211_deliver_data(vap, ni, m); 828 return IEEE80211_FC0_TYPE_DATA; 829 830 case IEEE80211_FC0_TYPE_MGT: 831 vap->iv_stats.is_rx_mgmt++; 832 IEEE80211_NODE_STAT(ni, rx_mgmt); 833 if (dir != IEEE80211_FC1_DIR_NODS) { 834 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 835 wh, "data", "incorrect dir 0x%x", dir); 836 vap->iv_stats.is_rx_wrongdir++; 837 goto err; 838 } 839 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 840 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 841 ni->ni_macaddr, "mgt", "too short: len %u", 842 m->m_pkthdr.len); 843 vap->iv_stats.is_rx_tooshort++; 844 goto out; 845 } 846 #ifdef IEEE80211_DEBUG 847 if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) || 848 ieee80211_msg_dumppkts(vap)) { 849 if_printf(ifp, "received %s from %s rssi %d\n", 850 ieee80211_mgt_subtype_name[subtype >> 851 IEEE80211_FC0_SUBTYPE_SHIFT], 852 ether_sprintf(wh->i_addr2), rssi); 853 } 854 #endif 855 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 856 if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) { 857 /* 858 * Only shared key auth frames with a challenge 859 * should be encrypted, discard all others. 860 */ 861 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 862 wh, ieee80211_mgt_subtype_name[subtype >> 863 IEEE80211_FC0_SUBTYPE_SHIFT], 864 "%s", "WEP set but not permitted"); 865 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 866 goto out; 867 } 868 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 869 /* 870 * Discard encrypted frames when privacy is off. 871 */ 872 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 873 wh, "mgt", "%s", "WEP set but PRIVACY off"); 874 vap->iv_stats.is_rx_noprivacy++; 875 goto out; 876 } 877 hdrspace = ieee80211_hdrspace(ic, wh); 878 key = ieee80211_crypto_decap(ni, m, hdrspace); 879 if (key == NULL) { 880 /* NB: stats+msgs handled in crypto_decap */ 881 goto out; 882 } 883 wh = mtod(m, struct ieee80211_frame *); 884 wh->i_fc[1] &= ~IEEE80211_FC1_WEP; 885 } 886 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf); 887 goto out; 888 889 case IEEE80211_FC0_TYPE_CTL: 890 vap->iv_stats.is_rx_ctl++; 891 IEEE80211_NODE_STAT(ni, rx_ctrl); 892 vap->iv_recv_ctl(ni, m, subtype); 893 goto out; 894 895 default: 896 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 897 wh, NULL, "bad frame type 0x%x", type); 898 /* should not come here */ 899 break; 900 } 901 err: 902 ifp->if_ierrors++; 903 out: 904 if (m != NULL) { 905 if (need_tap && ieee80211_radiotap_active_vap(vap)) 906 ieee80211_radiotap_rx(vap, m); 907 m_freem(m); 908 } 909 return type; 910 #undef SEQ_LEQ 911 } 912 913 static void 914 sta_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh, 915 int rssi, int nf, uint16_t seq, uint16_t status) 916 { 917 struct ieee80211vap *vap = ni->ni_vap; 918 919 if (ni->ni_authmode == IEEE80211_AUTH_SHARED) { 920 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 921 ni->ni_macaddr, "open auth", 922 "bad sta auth mode %u", ni->ni_authmode); 923 vap->iv_stats.is_rx_bad_auth++; /* XXX */ 924 return; 925 } 926 if (vap->iv_state != IEEE80211_S_AUTH || 927 seq != IEEE80211_AUTH_OPEN_RESPONSE) { 928 vap->iv_stats.is_rx_bad_auth++; 929 return; 930 } 931 if (status != 0) { 932 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 933 ni, "open auth failed (reason %d)", status); 934 vap->iv_stats.is_rx_auth_fail++; 935 vap->iv_stats.is_rx_authfail_code = status; 936 ieee80211_new_state(vap, IEEE80211_S_SCAN, 937 IEEE80211_SCAN_FAIL_STATUS); 938 } else 939 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 940 } 941 942 static void 943 sta_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh, 944 uint8_t *frm, uint8_t *efrm, int rssi, int nf, 945 uint16_t seq, uint16_t status) 946 { 947 struct ieee80211vap *vap = ni->ni_vap; 948 uint8_t *challenge; 949 int estatus; 950 951 /* 952 * NB: this can happen as we allow pre-shared key 953 * authentication to be enabled w/o wep being turned 954 * on so that configuration of these can be done 955 * in any order. It may be better to enforce the 956 * ordering in which case this check would just be 957 * for sanity/consistency. 958 */ 959 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 960 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 961 ni->ni_macaddr, "shared key auth", 962 "%s", " PRIVACY is disabled"); 963 estatus = IEEE80211_STATUS_ALG; 964 goto bad; 965 } 966 /* 967 * Pre-shared key authentication is evil; accept 968 * it only if explicitly configured (it is supported 969 * mainly for compatibility with clients like OS X). 970 */ 971 if (ni->ni_authmode != IEEE80211_AUTH_AUTO && 972 ni->ni_authmode != IEEE80211_AUTH_SHARED) { 973 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 974 ni->ni_macaddr, "shared key auth", 975 "bad sta auth mode %u", ni->ni_authmode); 976 vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */ 977 estatus = IEEE80211_STATUS_ALG; 978 goto bad; 979 } 980 981 challenge = NULL; 982 if (frm + 1 < efrm) { 983 if ((frm[1] + 2) > (efrm - frm)) { 984 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 985 ni->ni_macaddr, "shared key auth", 986 "ie %d/%d too long", 987 frm[0], (frm[1] + 2) - (efrm - frm)); 988 vap->iv_stats.is_rx_bad_auth++; 989 estatus = IEEE80211_STATUS_CHALLENGE; 990 goto bad; 991 } 992 if (*frm == IEEE80211_ELEMID_CHALLENGE) 993 challenge = frm; 994 frm += frm[1] + 2; 995 } 996 switch (seq) { 997 case IEEE80211_AUTH_SHARED_CHALLENGE: 998 case IEEE80211_AUTH_SHARED_RESPONSE: 999 if (challenge == NULL) { 1000 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1001 ni->ni_macaddr, "shared key auth", 1002 "%s", "no challenge"); 1003 vap->iv_stats.is_rx_bad_auth++; 1004 estatus = IEEE80211_STATUS_CHALLENGE; 1005 goto bad; 1006 } 1007 if (challenge[1] != IEEE80211_CHALLENGE_LEN) { 1008 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1009 ni->ni_macaddr, "shared key auth", 1010 "bad challenge len %d", challenge[1]); 1011 vap->iv_stats.is_rx_bad_auth++; 1012 estatus = IEEE80211_STATUS_CHALLENGE; 1013 goto bad; 1014 } 1015 default: 1016 break; 1017 } 1018 if (vap->iv_state != IEEE80211_S_AUTH) 1019 return; 1020 switch (seq) { 1021 case IEEE80211_AUTH_SHARED_PASS: 1022 if (ni->ni_challenge != NULL) { 1023 free(ni->ni_challenge, M_80211_NODE); 1024 ni->ni_challenge = NULL; 1025 } 1026 if (status != 0) { 1027 IEEE80211_NOTE_FRAME(vap, 1028 IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, wh, 1029 "shared key auth failed (reason %d)", status); 1030 vap->iv_stats.is_rx_auth_fail++; 1031 vap->iv_stats.is_rx_authfail_code = status; 1032 return; 1033 } 1034 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 1035 break; 1036 case IEEE80211_AUTH_SHARED_CHALLENGE: 1037 if (!ieee80211_alloc_challenge(ni)) 1038 return; 1039 /* XXX could optimize by passing recvd challenge */ 1040 memcpy(ni->ni_challenge, &challenge[2], challenge[1]); 1041 IEEE80211_SEND_MGMT(ni, 1042 IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 1043 break; 1044 default: 1045 IEEE80211_DISCARD(vap, IEEE80211_MSG_AUTH, 1046 wh, "shared key auth", "bad seq %d", seq); 1047 vap->iv_stats.is_rx_bad_auth++; 1048 return; 1049 } 1050 return; 1051 bad: 1052 /* 1053 * Kick the state machine. This short-circuits 1054 * using the mgt frame timeout to trigger the 1055 * state transition. 1056 */ 1057 if (vap->iv_state == IEEE80211_S_AUTH) 1058 ieee80211_new_state(vap, IEEE80211_S_SCAN, 1059 IEEE80211_SCAN_FAIL_STATUS); 1060 } 1061 1062 static int 1063 ieee80211_parse_wmeparams(struct ieee80211vap *vap, uint8_t *frm, 1064 const struct ieee80211_frame *wh) 1065 { 1066 #define MS(_v, _f) (((_v) & _f) >> _f##_S) 1067 struct ieee80211_wme_state *wme = &vap->iv_ic->ic_wme; 1068 u_int len = frm[1], qosinfo; 1069 int i; 1070 1071 if (len < sizeof(struct ieee80211_wme_param)-2) { 1072 IEEE80211_DISCARD_IE(vap, 1073 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WME, 1074 wh, "WME", "too short, len %u", len); 1075 return -1; 1076 } 1077 qosinfo = frm[__offsetof(struct ieee80211_wme_param, param_qosInfo)]; 1078 qosinfo &= WME_QOSINFO_COUNT; 1079 /* XXX do proper check for wraparound */ 1080 if (qosinfo == wme->wme_wmeChanParams.cap_info) 1081 return 0; 1082 frm += __offsetof(struct ieee80211_wme_param, params_acParams); 1083 for (i = 0; i < WME_NUM_AC; i++) { 1084 struct wmeParams *wmep = 1085 &wme->wme_wmeChanParams.cap_wmeParams[i]; 1086 /* NB: ACI not used */ 1087 wmep->wmep_acm = MS(frm[0], WME_PARAM_ACM); 1088 wmep->wmep_aifsn = MS(frm[0], WME_PARAM_AIFSN); 1089 wmep->wmep_logcwmin = MS(frm[1], WME_PARAM_LOGCWMIN); 1090 wmep->wmep_logcwmax = MS(frm[1], WME_PARAM_LOGCWMAX); 1091 wmep->wmep_txopLimit = LE_READ_2(frm+2); 1092 frm += 4; 1093 } 1094 wme->wme_wmeChanParams.cap_info = qosinfo; 1095 return 1; 1096 #undef MS 1097 } 1098 1099 /* 1100 * Process 11h Channel Switch Announcement (CSA) ie. If this 1101 * is the first CSA then initiate the switch. Otherwise we 1102 * track state and trigger completion and/or cancel of the switch. 1103 * XXX should be public for IBSS use 1104 */ 1105 static void 1106 ieee80211_parse_csaparams(struct ieee80211vap *vap, uint8_t *frm, 1107 const struct ieee80211_frame *wh) 1108 { 1109 struct ieee80211com *ic = vap->iv_ic; 1110 const struct ieee80211_csa_ie *csa = 1111 (const struct ieee80211_csa_ie *) frm; 1112 1113 KASSERT(vap->iv_state >= IEEE80211_S_RUN, 1114 ("state %s", ieee80211_state_name[vap->iv_state])); 1115 1116 if (csa->csa_mode > 1) { 1117 IEEE80211_DISCARD_IE(vap, 1118 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1119 wh, "CSA", "invalid mode %u", csa->csa_mode); 1120 return; 1121 } 1122 IEEE80211_LOCK(ic); 1123 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 1124 /* 1125 * Convert the channel number to a channel reference. We 1126 * try first to preserve turbo attribute of the current 1127 * channel then fallback. Note this will not work if the 1128 * CSA specifies a channel that requires a band switch (e.g. 1129 * 11a => 11g). This is intentional as 11h is defined only 1130 * for 5GHz/11a and because the switch does not involve a 1131 * reassociation, protocol state (capabilities, negotated 1132 * rates, etc) may/will be wrong. 1133 */ 1134 struct ieee80211_channel *c = 1135 ieee80211_find_channel_byieee(ic, csa->csa_newchan, 1136 (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALLTURBO)); 1137 if (c == NULL) { 1138 c = ieee80211_find_channel_byieee(ic, 1139 csa->csa_newchan, 1140 (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALL)); 1141 if (c == NULL) { 1142 IEEE80211_DISCARD_IE(vap, 1143 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1144 wh, "CSA", "invalid channel %u", 1145 csa->csa_newchan); 1146 goto done; 1147 } 1148 } 1149 #if IEEE80211_CSA_COUNT_MIN > 0 1150 if (csa->csa_count < IEEE80211_CSA_COUNT_MIN) { 1151 /* 1152 * Require at least IEEE80211_CSA_COUNT_MIN count to 1153 * reduce the risk of being redirected by a fabricated 1154 * CSA. If a valid CSA is dropped we'll still get a 1155 * beacon miss when the AP leaves the channel so we'll 1156 * eventually follow to the new channel. 1157 * 1158 * NOTE: this violates the 11h spec that states that 1159 * count may be any value and if 0 then a switch 1160 * should happen asap. 1161 */ 1162 IEEE80211_DISCARD_IE(vap, 1163 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1164 wh, "CSA", "count %u too small, must be >= %u", 1165 csa->csa_count, IEEE80211_CSA_COUNT_MIN); 1166 goto done; 1167 } 1168 #endif 1169 ieee80211_csa_startswitch(ic, c, csa->csa_mode, csa->csa_count); 1170 } else { 1171 /* 1172 * Validate this ie against the initial CSA. We require 1173 * mode and channel not change and the count must be 1174 * monotonically decreasing. This may be pointless and 1175 * canceling the switch as a result may be too paranoid but 1176 * in the worst case if we drop out of CSA because of this 1177 * and the AP does move then we'll just end up taking a 1178 * beacon miss and scan to find the AP. 1179 * 1180 * XXX may want <= on count as we also process ProbeResp 1181 * frames and those may come in w/ the same count as the 1182 * previous beacon; but doing so leaves us open to a stuck 1183 * count until we add a dead-man timer 1184 */ 1185 if (!(csa->csa_count < ic->ic_csa_count && 1186 csa->csa_mode == ic->ic_csa_mode && 1187 csa->csa_newchan == ieee80211_chan2ieee(ic, ic->ic_csa_newchan))) { 1188 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_DOTH, wh, 1189 "CSA ie mismatch, initial ie <%d,%d,%d>, " 1190 "this ie <%d,%d,%d>", ic->ic_csa_mode, 1191 ic->ic_csa_newchan, ic->ic_csa_count, 1192 csa->csa_mode, csa->csa_newchan, csa->csa_count); 1193 ieee80211_csa_cancelswitch(ic); 1194 } else { 1195 if (csa->csa_count <= 1) 1196 ieee80211_csa_completeswitch(ic); 1197 else 1198 ic->ic_csa_count = csa->csa_count; 1199 } 1200 } 1201 done: 1202 IEEE80211_UNLOCK(ic); 1203 } 1204 1205 /* 1206 * Return non-zero if a background scan may be continued: 1207 * o bg scan is active 1208 * o no channel switch is pending 1209 * o there has not been any traffic recently 1210 * 1211 * Note we do not check if there is an administrative enable; 1212 * this is only done to start the scan. We assume that any 1213 * change in state will be accompanied by a request to cancel 1214 * active scans which will otherwise cause this test to fail. 1215 */ 1216 static __inline int 1217 contbgscan(struct ieee80211vap *vap) 1218 { 1219 struct ieee80211com *ic = vap->iv_ic; 1220 1221 return ((ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN) && 1222 (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && 1223 vap->iv_state == IEEE80211_S_RUN && /* XXX? */ 1224 time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)); 1225 } 1226 1227 /* 1228 * Return non-zero if a backgrond scan may be started: 1229 * o bg scanning is administratively enabled 1230 * o no channel switch is pending 1231 * o we are not boosted on a dynamic turbo channel 1232 * o there has not been a scan recently 1233 * o there has not been any traffic recently 1234 */ 1235 static __inline int 1236 startbgscan(struct ieee80211vap *vap) 1237 { 1238 struct ieee80211com *ic = vap->iv_ic; 1239 1240 return ((vap->iv_flags & IEEE80211_F_BGSCAN) && 1241 (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && 1242 #ifdef IEEE80211_SUPPORT_SUPERG 1243 !IEEE80211_IS_CHAN_DTURBO(ic->ic_curchan) && 1244 #endif 1245 time_after(ticks, ic->ic_lastscan + vap->iv_bgscanintvl) && 1246 time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)); 1247 } 1248 1249 static void 1250 sta_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, 1251 int subtype, int rssi, int nf) 1252 { 1253 #define ISPROBE(_st) ((_st) == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1254 #define ISREASSOC(_st) ((_st) == IEEE80211_FC0_SUBTYPE_REASSOC_RESP) 1255 struct ieee80211vap *vap = ni->ni_vap; 1256 struct ieee80211com *ic = ni->ni_ic; 1257 struct ieee80211_frame *wh; 1258 uint8_t *frm, *efrm; 1259 uint8_t *rates, *xrates, *wme, *htcap, *htinfo; 1260 uint8_t rate; 1261 1262 wh = mtod(m0, struct ieee80211_frame *); 1263 frm = (uint8_t *)&wh[1]; 1264 efrm = mtod(m0, uint8_t *) + m0->m_len; 1265 switch (subtype) { 1266 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1267 case IEEE80211_FC0_SUBTYPE_BEACON: { 1268 struct ieee80211_scanparams scan; 1269 /* 1270 * We process beacon/probe response frames: 1271 * o when scanning, or 1272 * o station mode when associated (to collect state 1273 * updates such as 802.11g slot time) 1274 * Frames otherwise received are discarded. 1275 */ 1276 if (!((ic->ic_flags & IEEE80211_F_SCAN) || ni->ni_associd)) { 1277 vap->iv_stats.is_rx_mgtdiscard++; 1278 return; 1279 } 1280 /* XXX probe response in sta mode when !scanning? */ 1281 if (ieee80211_parse_beacon(ni, m0, &scan) != 0) 1282 return; 1283 /* 1284 * Count frame now that we know it's to be processed. 1285 */ 1286 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1287 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1288 IEEE80211_NODE_STAT(ni, rx_beacons); 1289 } else 1290 IEEE80211_NODE_STAT(ni, rx_proberesp); 1291 /* 1292 * When operating in station mode, check for state updates. 1293 * Be careful to ignore beacons received while doing a 1294 * background scan. We consider only 11g/WMM stuff right now. 1295 */ 1296 if (ni->ni_associd != 0 && 1297 ((ic->ic_flags & IEEE80211_F_SCAN) == 0 || 1298 IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_bssid))) { 1299 /* record tsf of last beacon */ 1300 memcpy(ni->ni_tstamp.data, scan.tstamp, 1301 sizeof(ni->ni_tstamp)); 1302 /* count beacon frame for s/w bmiss handling */ 1303 vap->iv_swbmiss_count++; 1304 vap->iv_bmiss_count = 0; 1305 if (ni->ni_erp != scan.erp) { 1306 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1307 wh->i_addr2, 1308 "erp change: was 0x%x, now 0x%x", 1309 ni->ni_erp, scan.erp); 1310 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1311 (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) 1312 ic->ic_flags |= IEEE80211_F_USEPROT; 1313 else 1314 ic->ic_flags &= ~IEEE80211_F_USEPROT; 1315 ni->ni_erp = scan.erp; 1316 /* XXX statistic */ 1317 /* XXX driver notification */ 1318 } 1319 if ((ni->ni_capinfo ^ scan.capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME) { 1320 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1321 wh->i_addr2, 1322 "capabilities change: was 0x%x, now 0x%x", 1323 ni->ni_capinfo, scan.capinfo); 1324 /* 1325 * NB: we assume short preamble doesn't 1326 * change dynamically 1327 */ 1328 ieee80211_set_shortslottime(ic, 1329 IEEE80211_IS_CHAN_A(ic->ic_bsschan) || 1330 (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1331 ni->ni_capinfo = (ni->ni_capinfo &~ IEEE80211_CAPINFO_SHORT_SLOTTIME) 1332 | (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME); 1333 /* XXX statistic */ 1334 } 1335 if (scan.wme != NULL && 1336 (ni->ni_flags & IEEE80211_NODE_QOS) && 1337 ieee80211_parse_wmeparams(vap, scan.wme, wh) > 0) 1338 ieee80211_wme_updateparams(vap); 1339 #ifdef IEEE80211_SUPPORT_SUPERG 1340 if (scan.ath != NULL) 1341 ieee80211_parse_athparams(ni, scan.ath, wh); 1342 #endif 1343 if (scan.htcap != NULL && scan.htinfo != NULL && 1344 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1345 ieee80211_ht_updateparams(ni, 1346 scan.htcap, scan.htinfo); 1347 /* XXX state changes? */ 1348 } 1349 if (scan.tim != NULL) { 1350 struct ieee80211_tim_ie *tim = 1351 (struct ieee80211_tim_ie *) scan.tim; 1352 #if 0 1353 int aid = IEEE80211_AID(ni->ni_associd); 1354 int ix = aid / NBBY; 1355 int min = tim->tim_bitctl &~ 1; 1356 int max = tim->tim_len + min - 4; 1357 if ((tim->tim_bitctl&1) || 1358 (min <= ix && ix <= max && 1359 isset(tim->tim_bitmap - min, aid))) { 1360 /* 1361 * XXX Do not let bg scan kick off 1362 * we are expecting data. 1363 */ 1364 ic->ic_lastdata = ticks; 1365 ieee80211_sta_pwrsave(vap, 0); 1366 } 1367 #endif 1368 ni->ni_dtim_count = tim->tim_count; 1369 ni->ni_dtim_period = tim->tim_period; 1370 } 1371 if (scan.csa != NULL && 1372 (vap->iv_flags & IEEE80211_F_DOTH)) 1373 ieee80211_parse_csaparams(vap, scan.csa, wh); 1374 else if (ic->ic_flags & IEEE80211_F_CSAPENDING) { 1375 /* 1376 * No CSA ie or 11h disabled, but a channel 1377 * switch is pending; drop out so we aren't 1378 * stuck in CSA state. If the AP really is 1379 * moving we'll get a beacon miss and scan. 1380 */ 1381 IEEE80211_LOCK(ic); 1382 ieee80211_csa_cancelswitch(ic); 1383 IEEE80211_UNLOCK(ic); 1384 } 1385 /* 1386 * If scanning, pass the info to the scan module. 1387 * Otherwise, check if it's the right time to do 1388 * a background scan. Background scanning must 1389 * be enabled and we must not be operating in the 1390 * turbo phase of dynamic turbo mode. Then, 1391 * it's been a while since the last background 1392 * scan and if no data frames have come through 1393 * recently, kick off a scan. Note that this 1394 * is the mechanism by which a background scan 1395 * is started _and_ continued each time we 1396 * return on-channel to receive a beacon from 1397 * our ap. 1398 */ 1399 if (ic->ic_flags & IEEE80211_F_SCAN) { 1400 ieee80211_add_scan(vap, &scan, wh, 1401 subtype, rssi, nf); 1402 } else if (contbgscan(vap)) { 1403 ieee80211_bg_scan(vap, 0); 1404 } else if (startbgscan(vap)) { 1405 vap->iv_stats.is_scan_bg++; 1406 #if 0 1407 /* wakeup if we are sleeing */ 1408 ieee80211_set_pwrsave(vap, 0); 1409 #endif 1410 ieee80211_bg_scan(vap, 0); 1411 } 1412 return; 1413 } 1414 /* 1415 * If scanning, just pass information to the scan module. 1416 */ 1417 if (ic->ic_flags & IEEE80211_F_SCAN) { 1418 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1419 /* 1420 * Actively scanning a channel marked passive; 1421 * send a probe request now that we know there 1422 * is 802.11 traffic present. 1423 * 1424 * XXX check if the beacon we recv'd gives 1425 * us what we need and suppress the probe req 1426 */ 1427 ieee80211_probe_curchan(vap, 1); 1428 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1429 } 1430 ieee80211_add_scan(vap, &scan, wh, subtype, rssi, nf); 1431 return; 1432 } 1433 break; 1434 } 1435 1436 case IEEE80211_FC0_SUBTYPE_AUTH: { 1437 uint16_t algo, seq, status; 1438 /* 1439 * auth frame format 1440 * [2] algorithm 1441 * [2] sequence 1442 * [2] status 1443 * [tlv*] challenge 1444 */ 1445 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1446 algo = le16toh(*(uint16_t *)frm); 1447 seq = le16toh(*(uint16_t *)(frm + 2)); 1448 status = le16toh(*(uint16_t *)(frm + 4)); 1449 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2, 1450 "recv auth frame with algorithm %d seq %d", algo, seq); 1451 1452 if (vap->iv_flags & IEEE80211_F_COUNTERM) { 1453 IEEE80211_DISCARD(vap, 1454 IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO, 1455 wh, "auth", "%s", "TKIP countermeasures enabled"); 1456 vap->iv_stats.is_rx_auth_countermeasures++; 1457 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 1458 ieee80211_send_error(ni, wh->i_addr2, 1459 IEEE80211_FC0_SUBTYPE_AUTH, 1460 IEEE80211_REASON_MIC_FAILURE); 1461 } 1462 return; 1463 } 1464 if (algo == IEEE80211_AUTH_ALG_SHARED) 1465 sta_auth_shared(ni, wh, frm + 6, efrm, rssi, nf, 1466 seq, status); 1467 else if (algo == IEEE80211_AUTH_ALG_OPEN) 1468 sta_auth_open(ni, wh, rssi, nf, seq, status); 1469 else { 1470 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1471 wh, "auth", "unsupported alg %d", algo); 1472 vap->iv_stats.is_rx_auth_unsupported++; 1473 return; 1474 } 1475 break; 1476 } 1477 1478 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 1479 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: { 1480 uint16_t capinfo, associd; 1481 uint16_t status; 1482 1483 if (vap->iv_state != IEEE80211_S_ASSOC) { 1484 vap->iv_stats.is_rx_mgtdiscard++; 1485 return; 1486 } 1487 1488 /* 1489 * asresp frame format 1490 * [2] capability information 1491 * [2] status 1492 * [2] association ID 1493 * [tlv] supported rates 1494 * [tlv] extended supported rates 1495 * [tlv] WME 1496 * [tlv] HT capabilities 1497 * [tlv] HT info 1498 */ 1499 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1500 ni = vap->iv_bss; 1501 capinfo = le16toh(*(uint16_t *)frm); 1502 frm += 2; 1503 status = le16toh(*(uint16_t *)frm); 1504 frm += 2; 1505 if (status != 0) { 1506 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1507 wh->i_addr2, "%sassoc failed (reason %d)", 1508 ISREASSOC(subtype) ? "re" : "", status); 1509 vap->iv_stats.is_rx_auth_fail++; /* XXX */ 1510 return; 1511 } 1512 associd = le16toh(*(uint16_t *)frm); 1513 frm += 2; 1514 1515 rates = xrates = wme = htcap = htinfo = NULL; 1516 while (efrm - frm > 1) { 1517 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1518 switch (*frm) { 1519 case IEEE80211_ELEMID_RATES: 1520 rates = frm; 1521 break; 1522 case IEEE80211_ELEMID_XRATES: 1523 xrates = frm; 1524 break; 1525 case IEEE80211_ELEMID_HTCAP: 1526 htcap = frm; 1527 break; 1528 case IEEE80211_ELEMID_HTINFO: 1529 htinfo = frm; 1530 break; 1531 case IEEE80211_ELEMID_VENDOR: 1532 if (iswmeoui(frm)) 1533 wme = frm; 1534 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) { 1535 /* 1536 * Accept pre-draft HT ie's if the 1537 * standard ones have not been seen. 1538 */ 1539 if (ishtcapoui(frm)) { 1540 if (htcap == NULL) 1541 htcap = frm; 1542 } else if (ishtinfooui(frm)) { 1543 if (htinfo == NULL) 1544 htcap = frm; 1545 } 1546 } 1547 /* XXX Atheros OUI support */ 1548 break; 1549 } 1550 frm += frm[1] + 2; 1551 } 1552 1553 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1554 if (xrates != NULL) 1555 IEEE80211_VERIFY_ELEMENT(xrates, 1556 IEEE80211_RATE_MAXSIZE - rates[1], return); 1557 rate = ieee80211_setup_rates(ni, rates, xrates, 1558 IEEE80211_F_JOIN | 1559 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1560 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1561 if (rate & IEEE80211_RATE_BASIC) { 1562 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1563 wh->i_addr2, 1564 "%sassoc failed (rate set mismatch)", 1565 ISREASSOC(subtype) ? "re" : ""); 1566 vap->iv_stats.is_rx_assoc_norate++; 1567 ieee80211_new_state(vap, IEEE80211_S_SCAN, 1568 IEEE80211_SCAN_FAIL_STATUS); 1569 return; 1570 } 1571 1572 ni->ni_capinfo = capinfo; 1573 ni->ni_associd = associd; 1574 if (ni->ni_jointime == 0) 1575 ni->ni_jointime = time_uptime; 1576 if (wme != NULL && 1577 ieee80211_parse_wmeparams(vap, wme, wh) >= 0) { 1578 ni->ni_flags |= IEEE80211_NODE_QOS; 1579 ieee80211_wme_updateparams(vap); 1580 } else 1581 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1582 /* 1583 * Setup HT state according to the negotiation. 1584 * 1585 * NB: shouldn't need to check if HT use is enabled but some 1586 * ap's send back HT ie's even when we don't indicate we 1587 * are HT capable in our AssocReq. 1588 */ 1589 if (htcap != NULL && htinfo != NULL && 1590 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1591 ieee80211_ht_node_init(ni); 1592 ieee80211_ht_updateparams(ni, htcap, htinfo); 1593 ieee80211_setup_htrates(ni, htcap, 1594 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1595 ieee80211_setup_basic_htrates(ni, htinfo); 1596 ieee80211_node_setuptxparms(ni); 1597 } else { 1598 #ifdef IEEE80211_SUPPORT_SUPERG 1599 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_ATH)) 1600 ieee80211_ff_node_init(ni); 1601 #endif 1602 } 1603 /* 1604 * Configure state now that we are associated. 1605 * 1606 * XXX may need different/additional driver callbacks? 1607 */ 1608 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) || 1609 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1610 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 1611 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 1612 } else { 1613 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 1614 ic->ic_flags |= IEEE80211_F_USEBARKER; 1615 } 1616 ieee80211_set_shortslottime(ic, 1617 IEEE80211_IS_CHAN_A(ic->ic_curchan) || 1618 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1619 /* 1620 * Honor ERP protection. 1621 * 1622 * NB: ni_erp should zero for non-11g operation. 1623 */ 1624 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1625 (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) 1626 ic->ic_flags |= IEEE80211_F_USEPROT; 1627 else 1628 ic->ic_flags &= ~IEEE80211_F_USEPROT; 1629 IEEE80211_NOTE_MAC(vap, 1630 IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, wh->i_addr2, 1631 "%sassoc success at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 1632 ISREASSOC(subtype) ? "re" : "", 1633 IEEE80211_NODE_AID(ni), 1634 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 1635 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 1636 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "", 1637 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 1638 ni->ni_flags & IEEE80211_NODE_HT ? 1639 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 1640 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 1641 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 1642 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 1643 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 1644 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 1645 ", fast-frames" : "", 1646 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 1647 ", turbo" : "" 1648 ); 1649 ieee80211_new_state(vap, IEEE80211_S_RUN, subtype); 1650 break; 1651 } 1652 1653 case IEEE80211_FC0_SUBTYPE_DEAUTH: { 1654 uint16_t reason; 1655 1656 if (vap->iv_state == IEEE80211_S_SCAN) { 1657 vap->iv_stats.is_rx_mgtdiscard++; 1658 return; 1659 } 1660 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 1661 /* NB: can happen when in promiscuous mode */ 1662 vap->iv_stats.is_rx_mgtdiscard++; 1663 break; 1664 } 1665 1666 /* 1667 * deauth frame format 1668 * [2] reason 1669 */ 1670 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 1671 reason = le16toh(*(uint16_t *)frm); 1672 1673 vap->iv_stats.is_rx_deauth++; 1674 vap->iv_stats.is_rx_deauth_code = reason; 1675 IEEE80211_NODE_STAT(ni, rx_deauth); 1676 1677 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 1678 "recv deauthenticate (reason %d)", reason); 1679 ieee80211_new_state(vap, IEEE80211_S_AUTH, 1680 (reason << 8) | IEEE80211_FC0_SUBTYPE_DEAUTH); 1681 break; 1682 } 1683 1684 case IEEE80211_FC0_SUBTYPE_DISASSOC: { 1685 uint16_t reason; 1686 1687 if (vap->iv_state != IEEE80211_S_RUN && 1688 vap->iv_state != IEEE80211_S_ASSOC && 1689 vap->iv_state != IEEE80211_S_AUTH) { 1690 vap->iv_stats.is_rx_mgtdiscard++; 1691 return; 1692 } 1693 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 1694 /* NB: can happen when in promiscuous mode */ 1695 vap->iv_stats.is_rx_mgtdiscard++; 1696 break; 1697 } 1698 1699 /* 1700 * disassoc frame format 1701 * [2] reason 1702 */ 1703 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 1704 reason = le16toh(*(uint16_t *)frm); 1705 1706 vap->iv_stats.is_rx_disassoc++; 1707 vap->iv_stats.is_rx_disassoc_code = reason; 1708 IEEE80211_NODE_STAT(ni, rx_disassoc); 1709 1710 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 1711 "recv disassociate (reason %d)", reason); 1712 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 1713 break; 1714 } 1715 1716 case IEEE80211_FC0_SUBTYPE_ACTION: 1717 if (vap->iv_state == IEEE80211_S_RUN) { 1718 if (ieee80211_parse_action(ni, m0) == 0) 1719 ic->ic_recv_action(ni, wh, frm, efrm); 1720 } else 1721 vap->iv_stats.is_rx_mgtdiscard++; 1722 break; 1723 1724 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1725 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1726 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 1727 vap->iv_stats.is_rx_mgtdiscard++; 1728 return; 1729 default: 1730 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1731 wh, "mgt", "subtype 0x%x not handled", subtype); 1732 vap->iv_stats.is_rx_badsubtype++; 1733 break; 1734 } 1735 #undef ISREASSOC 1736 #undef ISPROBE 1737 } 1738 1739 static void 1740 sta_recv_ctl(struct ieee80211_node *ni, struct mbuf *m0, int subtype) 1741 { 1742 } 1743