ieee80211_sta.c revision 262007
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: stable/10/sys/net80211/ieee80211_sta.c 262007 2014-02-17 01:36:53Z kevlo $"); 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/if_dl.h> 54#include <net/if_var.h> 55#include <net/ethernet.h> 56 57#include <net/bpf.h> 58 59#include <net80211/ieee80211_var.h> 60#include <net80211/ieee80211_sta.h> 61#include <net80211/ieee80211_input.h> 62#ifdef IEEE80211_SUPPORT_SUPERG 63#include <net80211/ieee80211_superg.h> 64#endif 65#include <net80211/ieee80211_ratectl.h> 66#include <net80211/ieee80211_sta.h> 67 68#define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2) 69 70static void sta_vattach(struct ieee80211vap *); 71static void sta_beacon_miss(struct ieee80211vap *); 72static int sta_newstate(struct ieee80211vap *, enum ieee80211_state, int); 73static int sta_input(struct ieee80211_node *, struct mbuf *, int, int); 74static void sta_recv_mgmt(struct ieee80211_node *, struct mbuf *, 75 int subtype, int rssi, int nf); 76static void sta_recv_ctl(struct ieee80211_node *, struct mbuf *, int subtype); 77 78void 79ieee80211_sta_attach(struct ieee80211com *ic) 80{ 81 ic->ic_vattach[IEEE80211_M_STA] = sta_vattach; 82} 83 84void 85ieee80211_sta_detach(struct ieee80211com *ic) 86{ 87} 88 89static void 90sta_vdetach(struct ieee80211vap *vap) 91{ 92} 93 94static void 95sta_vattach(struct ieee80211vap *vap) 96{ 97 vap->iv_newstate = sta_newstate; 98 vap->iv_input = sta_input; 99 vap->iv_recv_mgmt = sta_recv_mgmt; 100 vap->iv_recv_ctl = sta_recv_ctl; 101 vap->iv_opdetach = sta_vdetach; 102 vap->iv_bmiss = sta_beacon_miss; 103} 104 105/* 106 * Handle a beacon miss event. The common code filters out 107 * spurious events that can happen when scanning and/or before 108 * reaching RUN state. 109 */ 110static void 111sta_beacon_miss(struct ieee80211vap *vap) 112{ 113 struct ieee80211com *ic = vap->iv_ic; 114 115 IEEE80211_LOCK_ASSERT(ic); 116 117 KASSERT((ic->ic_flags & IEEE80211_F_SCAN) == 0, ("scanning")); 118 KASSERT(vap->iv_state >= IEEE80211_S_RUN, 119 ("wrong state %s", ieee80211_state_name[vap->iv_state])); 120 121 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 122 "beacon miss, mode %s state %s\n", 123 ieee80211_opmode_name[vap->iv_opmode], 124 ieee80211_state_name[vap->iv_state]); 125 126 if (vap->iv_state == IEEE80211_S_CSA) { 127 /* 128 * A Channel Switch is pending; assume we missed the 129 * beacon that would've completed the process and just 130 * force the switch. If we made a mistake we'll not 131 * find the AP on the new channel and fall back to a 132 * normal scan. 133 */ 134 ieee80211_csa_completeswitch(ic); 135 return; 136 } 137 if (++vap->iv_bmiss_count < vap->iv_bmiss_max) { 138 /* 139 * Send a directed probe req before falling back to a 140 * scan; if we receive a response ic_bmiss_count will 141 * be reset. Some cards mistakenly report beacon miss 142 * so this avoids the expensive scan if the ap is 143 * still there. 144 */ 145 ieee80211_send_probereq(vap->iv_bss, vap->iv_myaddr, 146 vap->iv_bss->ni_bssid, vap->iv_bss->ni_bssid, 147 vap->iv_bss->ni_essid, vap->iv_bss->ni_esslen); 148 return; 149 } 150 151 callout_stop(&vap->iv_swbmiss); 152 vap->iv_bmiss_count = 0; 153 vap->iv_stats.is_beacon_miss++; 154 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 155#ifdef IEEE80211_SUPPORT_SUPERG 156 struct ieee80211com *ic = vap->iv_ic; 157 158 /* 159 * If we receive a beacon miss interrupt when using 160 * dynamic turbo, attempt to switch modes before 161 * reassociating. 162 */ 163 if (IEEE80211_ATH_CAP(vap, vap->iv_bss, IEEE80211_NODE_TURBOP)) 164 ieee80211_dturbo_switch(vap, 165 ic->ic_bsschan->ic_flags ^ IEEE80211_CHAN_TURBO); 166#endif 167 /* 168 * Try to reassociate before scanning for a new ap. 169 */ 170 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 171 } else { 172 /* 173 * Somebody else is controlling state changes (e.g. 174 * a user-mode app) don't do anything that would 175 * confuse them; just drop into scan mode so they'll 176 * notified of the state change and given control. 177 */ 178 ieee80211_new_state(vap, IEEE80211_S_SCAN, 0); 179 } 180} 181 182/* 183 * Handle deauth with reason. We retry only for 184 * the cases where we might succeed. Otherwise 185 * we downgrade the ap and scan. 186 */ 187static void 188sta_authretry(struct ieee80211vap *vap, struct ieee80211_node *ni, int reason) 189{ 190 switch (reason) { 191 case IEEE80211_STATUS_SUCCESS: /* NB: MLME assoc */ 192 case IEEE80211_STATUS_TIMEOUT: 193 case IEEE80211_REASON_ASSOC_EXPIRE: 194 case IEEE80211_REASON_NOT_AUTHED: 195 case IEEE80211_REASON_NOT_ASSOCED: 196 case IEEE80211_REASON_ASSOC_LEAVE: 197 case IEEE80211_REASON_ASSOC_NOT_AUTHED: 198 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, 1); 199 break; 200 default: 201 ieee80211_scan_assoc_fail(vap, vap->iv_bss->ni_macaddr, reason); 202 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 203 ieee80211_check_scan_current(vap); 204 break; 205 } 206} 207 208/* 209 * IEEE80211_M_STA vap state machine handler. 210 * This routine handles the main states in the 802.11 protocol. 211 */ 212static int 213sta_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 214{ 215 struct ieee80211com *ic = vap->iv_ic; 216 struct ieee80211_node *ni; 217 enum ieee80211_state ostate; 218 219 IEEE80211_LOCK_ASSERT(ic); 220 221 ostate = vap->iv_state; 222 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 223 __func__, ieee80211_state_name[ostate], 224 ieee80211_state_name[nstate], arg); 225 vap->iv_state = nstate; /* state transition */ 226 callout_stop(&vap->iv_mgtsend); /* XXX callout_drain */ 227 if (ostate != IEEE80211_S_SCAN) 228 ieee80211_cancel_scan(vap); /* background scan */ 229 ni = vap->iv_bss; /* NB: no reference held */ 230 if (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS) 231 callout_stop(&vap->iv_swbmiss); 232 switch (nstate) { 233 case IEEE80211_S_INIT: 234 switch (ostate) { 235 case IEEE80211_S_SLEEP: 236 /* XXX wakeup */ 237 case IEEE80211_S_RUN: 238 IEEE80211_SEND_MGMT(ni, 239 IEEE80211_FC0_SUBTYPE_DISASSOC, 240 IEEE80211_REASON_ASSOC_LEAVE); 241 ieee80211_sta_leave(ni); 242 break; 243 case IEEE80211_S_ASSOC: 244 IEEE80211_SEND_MGMT(ni, 245 IEEE80211_FC0_SUBTYPE_DEAUTH, 246 IEEE80211_REASON_AUTH_LEAVE); 247 break; 248 case IEEE80211_S_SCAN: 249 ieee80211_cancel_scan(vap); 250 break; 251 default: 252 goto invalid; 253 } 254 if (ostate != IEEE80211_S_INIT) { 255 /* NB: optimize INIT -> INIT case */ 256 ieee80211_reset_bss(vap); 257 } 258 if (vap->iv_auth->ia_detach != NULL) 259 vap->iv_auth->ia_detach(vap); 260 break; 261 case IEEE80211_S_SCAN: 262 switch (ostate) { 263 case IEEE80211_S_INIT: 264 /* 265 * Initiate a scan. We can come here as a result 266 * of an IEEE80211_IOC_SCAN_REQ too in which case 267 * the vap will be marked with IEEE80211_FEXT_SCANREQ 268 * and the scan request parameters will be present 269 * in iv_scanreq. Otherwise we do the default. 270 */ 271 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 272 ieee80211_check_scan(vap, 273 vap->iv_scanreq_flags, 274 vap->iv_scanreq_duration, 275 vap->iv_scanreq_mindwell, 276 vap->iv_scanreq_maxdwell, 277 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 278 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 279 } else 280 ieee80211_check_scan_current(vap); 281 break; 282 case IEEE80211_S_SCAN: 283 case IEEE80211_S_AUTH: 284 case IEEE80211_S_ASSOC: 285 /* 286 * These can happen either because of a timeout 287 * on an assoc/auth response or because of a 288 * change in state that requires a reset. For 289 * the former we're called with a non-zero arg 290 * that is the cause for the failure; pass this 291 * to the scan code so it can update state. 292 * Otherwise trigger a new scan unless we're in 293 * manual roaming mode in which case an application 294 * must issue an explicit scan request. 295 */ 296 if (arg != 0) 297 ieee80211_scan_assoc_fail(vap, 298 vap->iv_bss->ni_macaddr, arg); 299 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 300 ieee80211_check_scan_current(vap); 301 break; 302 case IEEE80211_S_RUN: /* beacon miss */ 303 /* 304 * Beacon miss. Notify user space and if not 305 * under control of a user application (roaming 306 * manual) kick off a scan to re-connect. 307 */ 308 ieee80211_sta_leave(ni); 309 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 310 ieee80211_check_scan_current(vap); 311 break; 312 default: 313 goto invalid; 314 } 315 break; 316 case IEEE80211_S_AUTH: 317 switch (ostate) { 318 case IEEE80211_S_INIT: 319 case IEEE80211_S_SCAN: 320 IEEE80211_SEND_MGMT(ni, 321 IEEE80211_FC0_SUBTYPE_AUTH, 1); 322 break; 323 case IEEE80211_S_AUTH: 324 case IEEE80211_S_ASSOC: 325 switch (arg & 0xff) { 326 case IEEE80211_FC0_SUBTYPE_AUTH: 327 /* ??? */ 328 IEEE80211_SEND_MGMT(ni, 329 IEEE80211_FC0_SUBTYPE_AUTH, 2); 330 break; 331 case IEEE80211_FC0_SUBTYPE_DEAUTH: 332 sta_authretry(vap, ni, arg>>8); 333 break; 334 } 335 break; 336 case IEEE80211_S_RUN: 337 switch (arg & 0xff) { 338 case IEEE80211_FC0_SUBTYPE_AUTH: 339 IEEE80211_SEND_MGMT(ni, 340 IEEE80211_FC0_SUBTYPE_AUTH, 2); 341 vap->iv_state = ostate; /* stay RUN */ 342 break; 343 case IEEE80211_FC0_SUBTYPE_DEAUTH: 344 ieee80211_sta_leave(ni); 345 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 346 /* try to reauth */ 347 IEEE80211_SEND_MGMT(ni, 348 IEEE80211_FC0_SUBTYPE_AUTH, 1); 349 } 350 break; 351 } 352 break; 353 default: 354 goto invalid; 355 } 356 break; 357 case IEEE80211_S_ASSOC: 358 switch (ostate) { 359 case IEEE80211_S_AUTH: 360 case IEEE80211_S_ASSOC: 361 IEEE80211_SEND_MGMT(ni, 362 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 363 break; 364 case IEEE80211_S_SLEEP: /* cannot happen */ 365 case IEEE80211_S_RUN: 366 ieee80211_sta_leave(ni); 367 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 368 IEEE80211_SEND_MGMT(ni, arg ? 369 IEEE80211_FC0_SUBTYPE_REASSOC_REQ : 370 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 371 } 372 break; 373 default: 374 goto invalid; 375 } 376 break; 377 case IEEE80211_S_RUN: 378 if (vap->iv_flags & IEEE80211_F_WPA) { 379 /* XXX validate prerequisites */ 380 } 381 switch (ostate) { 382 case IEEE80211_S_RUN: 383 case IEEE80211_S_CSA: 384 break; 385 case IEEE80211_S_AUTH: /* when join is done in fw */ 386 case IEEE80211_S_ASSOC: 387#ifdef IEEE80211_DEBUG 388 if (ieee80211_msg_debug(vap)) { 389 ieee80211_note(vap, "%s with %s ssid ", 390 (vap->iv_opmode == IEEE80211_M_STA ? 391 "associated" : "synchronized"), 392 ether_sprintf(ni->ni_bssid)); 393 ieee80211_print_essid(vap->iv_bss->ni_essid, 394 ni->ni_esslen); 395 /* XXX MCS/HT */ 396 printf(" channel %d start %uMb\n", 397 ieee80211_chan2ieee(ic, ic->ic_curchan), 398 IEEE80211_RATE2MBS(ni->ni_txrate)); 399 } 400#endif 401 ieee80211_scan_assoc_success(vap, ni->ni_macaddr); 402 ieee80211_notify_node_join(ni, 403 arg == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 404 break; 405 case IEEE80211_S_SLEEP: 406 vap->iv_sta_ps(vap, 0); 407 break; 408 default: 409 goto invalid; 410 } 411 ieee80211_sync_curchan(ic); 412 if (ostate != IEEE80211_S_RUN && 413 (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS)) { 414 /* 415 * Start s/w beacon miss timer for devices w/o 416 * hardware support. We fudge a bit here since 417 * we're doing this in software. 418 */ 419 vap->iv_swbmiss_period = IEEE80211_TU_TO_TICKS( 420 2 * vap->iv_bmissthreshold * ni->ni_intval); 421 vap->iv_swbmiss_count = 0; 422 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, 423 ieee80211_swbmiss, vap); 424 } 425 /* 426 * When 802.1x is not in use mark the port authorized 427 * at this point so traffic can flow. 428 */ 429 if (ni->ni_authmode != IEEE80211_AUTH_8021X) 430 ieee80211_node_authorize(ni); 431 /* 432 * Fake association when joining an existing bss. 433 */ 434 if (ic->ic_newassoc != NULL) 435 ic->ic_newassoc(vap->iv_bss, ostate != IEEE80211_S_RUN); 436 break; 437 case IEEE80211_S_CSA: 438 if (ostate != IEEE80211_S_RUN) 439 goto invalid; 440 break; 441 case IEEE80211_S_SLEEP: 442 vap->iv_sta_ps(vap, 1); 443 break; 444 default: 445 invalid: 446 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 447 "%s: unexpected state transition %s -> %s\n", __func__, 448 ieee80211_state_name[ostate], ieee80211_state_name[nstate]); 449 break; 450 } 451 return 0; 452} 453 454/* 455 * Return non-zero if the frame is an echo of a multicast 456 * frame sent by ourself. The dir is known to be DSTODS. 457 */ 458static __inline int 459isdstods_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh) 460{ 461#define QWH4(wh) ((const struct ieee80211_qosframe_addr4 *)wh) 462#define WH4(wh) ((const struct ieee80211_frame_addr4 *)wh) 463 const uint8_t *sa; 464 465 KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode")); 466 467 if (!IEEE80211_IS_MULTICAST(wh->i_addr3)) 468 return 0; 469 sa = IEEE80211_QOS_HAS_SEQ(wh) ? QWH4(wh)->i_addr4 : WH4(wh)->i_addr4; 470 return IEEE80211_ADDR_EQ(sa, vap->iv_myaddr); 471#undef WH4 472#undef QWH4 473} 474 475/* 476 * Return non-zero if the frame is an echo of a multicast 477 * frame sent by ourself. The dir is known to be FROMDS. 478 */ 479static __inline int 480isfromds_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh) 481{ 482 KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode")); 483 484 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) 485 return 0; 486 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 487} 488 489/* 490 * Decide if a received management frame should be 491 * printed when debugging is enabled. This filters some 492 * of the less interesting frames that come frequently 493 * (e.g. beacons). 494 */ 495static __inline int 496doprint(struct ieee80211vap *vap, int subtype) 497{ 498 switch (subtype) { 499 case IEEE80211_FC0_SUBTYPE_BEACON: 500 return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN); 501 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 502 return 0; 503 } 504 return 1; 505} 506 507/* 508 * Process a received frame. The node associated with the sender 509 * should be supplied. If nothing was found in the node table then 510 * the caller is assumed to supply a reference to iv_bss instead. 511 * The RSSI and a timestamp are also supplied. The RSSI data is used 512 * during AP scanning to select a AP to associate with; it can have 513 * any units so long as values have consistent units and higher values 514 * mean ``better signal''. The receive timestamp is currently not used 515 * by the 802.11 layer. 516 */ 517static int 518sta_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf) 519{ 520#define HAS_SEQ(type) ((type & 0x4) == 0) 521 struct ieee80211vap *vap = ni->ni_vap; 522 struct ieee80211com *ic = ni->ni_ic; 523 struct ifnet *ifp = vap->iv_ifp; 524 struct ieee80211_frame *wh; 525 struct ieee80211_key *key; 526 struct ether_header *eh; 527 int hdrspace, need_tap = 1; /* mbuf need to be tapped. */ 528 uint8_t dir, type, subtype, qos; 529 uint8_t *bssid; 530 uint16_t rxseq; 531 532 if (m->m_flags & M_AMPDU_MPDU) { 533 /* 534 * Fastpath for A-MPDU reorder q resubmission. Frames 535 * w/ M_AMPDU_MPDU marked have already passed through 536 * here but were received out of order and been held on 537 * the reorder queue. When resubmitted they are marked 538 * with the M_AMPDU_MPDU flag and we can bypass most of 539 * the normal processing. 540 */ 541 wh = mtod(m, struct ieee80211_frame *); 542 type = IEEE80211_FC0_TYPE_DATA; 543 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 544 subtype = IEEE80211_FC0_SUBTYPE_QOS; 545 hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ 546 goto resubmit_ampdu; 547 } 548 549 KASSERT(ni != NULL, ("null node")); 550 ni->ni_inact = ni->ni_inact_reload; 551 552 type = -1; /* undefined */ 553 554 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 555 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 556 ni->ni_macaddr, NULL, 557 "too short (1): len %u", m->m_pkthdr.len); 558 vap->iv_stats.is_rx_tooshort++; 559 goto out; 560 } 561 /* 562 * Bit of a cheat here, we use a pointer for a 3-address 563 * frame format but don't reference fields past outside 564 * ieee80211_frame_min w/o first validating the data is 565 * present. 566 */ 567 wh = mtod(m, struct ieee80211_frame *); 568 569 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 570 IEEE80211_FC0_VERSION_0) { 571 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 572 ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x", 573 wh->i_fc[0], wh->i_fc[1]); 574 vap->iv_stats.is_rx_badversion++; 575 goto err; 576 } 577 578 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 579 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 580 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 581 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 582 bssid = wh->i_addr2; 583 if (!IEEE80211_ADDR_EQ(bssid, ni->ni_bssid)) { 584 /* not interested in */ 585 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 586 bssid, NULL, "%s", "not to bss"); 587 vap->iv_stats.is_rx_wrongbss++; 588 goto out; 589 } 590 591 /* 592 * Some devices may be in a promiscuous mode 593 * where they receive frames for multiple station 594 * addresses. 595 * 596 * If we receive a data frame that isn't 597 * destined to our VAP MAC, drop it. 598 * 599 * XXX TODO: This is only enforced when not scanning; 600 * XXX it assumes a software-driven scan will put the NIC 601 * XXX into a "no data frames" mode before setting this 602 * XXX flag. Otherwise it may be possible that we'll still 603 * XXX process data frames whilst scanning. 604 */ 605 if ((! IEEE80211_IS_MULTICAST(wh->i_addr1)) 606 && (! IEEE80211_ADDR_EQ(wh->i_addr1, IF_LLADDR(ifp)))) { 607 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 608 bssid, NULL, "not to cur sta: lladdr=%6D, addr1=%6D", 609 IF_LLADDR(ifp), ":", wh->i_addr1, ":"); 610 vap->iv_stats.is_rx_wrongbss++; 611 goto out; 612 } 613 614 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 615 ni->ni_noise = nf; 616 if (HAS_SEQ(type) && !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 617 uint8_t tid = ieee80211_gettid(wh); 618 if (IEEE80211_QOS_HAS_SEQ(wh) && 619 TID_TO_WME_AC(tid) >= WME_AC_VI) 620 ic->ic_wme.wme_hipri_traffic++; 621 rxseq = le16toh(*(uint16_t *)wh->i_seq); 622 if (! ieee80211_check_rxseq(ni, wh)) { 623 /* duplicate, discard */ 624 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 625 bssid, "duplicate", 626 "seqno <%u,%u> fragno <%u,%u> tid %u", 627 rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 628 ni->ni_rxseqs[tid] >> 629 IEEE80211_SEQ_SEQ_SHIFT, 630 rxseq & IEEE80211_SEQ_FRAG_MASK, 631 ni->ni_rxseqs[tid] & 632 IEEE80211_SEQ_FRAG_MASK, 633 tid); 634 vap->iv_stats.is_rx_dup++; 635 IEEE80211_NODE_STAT(ni, rx_dup); 636 goto out; 637 } 638 ni->ni_rxseqs[tid] = rxseq; 639 } 640 } 641 642 switch (type) { 643 case IEEE80211_FC0_TYPE_DATA: 644 hdrspace = ieee80211_hdrspace(ic, wh); 645 if (m->m_len < hdrspace && 646 (m = m_pullup(m, hdrspace)) == NULL) { 647 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 648 ni->ni_macaddr, NULL, 649 "data too short: expecting %u", hdrspace); 650 vap->iv_stats.is_rx_tooshort++; 651 goto out; /* XXX */ 652 } 653 /* 654 * Handle A-MPDU re-ordering. If the frame is to be 655 * processed directly then ieee80211_ampdu_reorder 656 * will return 0; otherwise it has consumed the mbuf 657 * and we should do nothing more with it. 658 */ 659 if ((m->m_flags & M_AMPDU) && 660 (dir == IEEE80211_FC1_DIR_FROMDS || 661 dir == IEEE80211_FC1_DIR_DSTODS) && 662 ieee80211_ampdu_reorder(ni, m) != 0) { 663 m = NULL; 664 goto out; 665 } 666 resubmit_ampdu: 667 if (dir == IEEE80211_FC1_DIR_FROMDS) { 668 if ((ifp->if_flags & IFF_SIMPLEX) && 669 isfromds_mcastecho(vap, wh)) { 670 /* 671 * In IEEE802.11 network, multicast 672 * packets sent from "me" are broadcast 673 * from the AP; silently discard for 674 * SIMPLEX interface. 675 */ 676 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 677 wh, "data", "%s", "multicast echo"); 678 vap->iv_stats.is_rx_mcastecho++; 679 goto out; 680 } 681 if ((vap->iv_flags & IEEE80211_F_DWDS) && 682 IEEE80211_IS_MULTICAST(wh->i_addr1)) { 683 /* 684 * DWDS sta's must drop 3-address mcast frames 685 * as they will be sent separately as a 4-addr 686 * frame. Accepting the 3-addr frame will 687 * confuse the bridge into thinking the sending 688 * sta is located at the end of WDS link. 689 */ 690 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 691 "3-address data", "%s", "DWDS enabled"); 692 vap->iv_stats.is_rx_mcastecho++; 693 goto out; 694 } 695 } else if (dir == IEEE80211_FC1_DIR_DSTODS) { 696 if ((vap->iv_flags & IEEE80211_F_DWDS) == 0) { 697 IEEE80211_DISCARD(vap, 698 IEEE80211_MSG_INPUT, wh, "4-address data", 699 "%s", "DWDS not enabled"); 700 vap->iv_stats.is_rx_wrongdir++; 701 goto out; 702 } 703 if ((ifp->if_flags & IFF_SIMPLEX) && 704 isdstods_mcastecho(vap, wh)) { 705 /* 706 * In IEEE802.11 network, multicast 707 * packets sent from "me" are broadcast 708 * from the AP; silently discard for 709 * SIMPLEX interface. 710 */ 711 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 712 "4-address data", "%s", "multicast echo"); 713 vap->iv_stats.is_rx_mcastecho++; 714 goto out; 715 } 716 } else { 717 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 718 "data", "incorrect dir 0x%x", dir); 719 vap->iv_stats.is_rx_wrongdir++; 720 goto out; 721 } 722 723 /* 724 * Handle privacy requirements. Note that we 725 * must not be preempted from here until after 726 * we (potentially) call ieee80211_crypto_demic; 727 * otherwise we may violate assumptions in the 728 * crypto cipher modules used to do delayed update 729 * of replay sequence numbers. 730 */ 731 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 732 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 733 /* 734 * Discard encrypted frames when privacy is off. 735 */ 736 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 737 wh, "WEP", "%s", "PRIVACY off"); 738 vap->iv_stats.is_rx_noprivacy++; 739 IEEE80211_NODE_STAT(ni, rx_noprivacy); 740 goto out; 741 } 742 key = ieee80211_crypto_decap(ni, m, hdrspace); 743 if (key == NULL) { 744 /* NB: stats+msgs handled in crypto_decap */ 745 IEEE80211_NODE_STAT(ni, rx_wepfail); 746 goto out; 747 } 748 wh = mtod(m, struct ieee80211_frame *); 749 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 750 } else { 751 /* XXX M_WEP and IEEE80211_F_PRIVACY */ 752 key = NULL; 753 } 754 755 /* 756 * Save QoS bits for use below--before we strip the header. 757 */ 758 if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { 759 qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? 760 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : 761 ((struct ieee80211_qosframe *)wh)->i_qos[0]; 762 } else 763 qos = 0; 764 765 /* 766 * Next up, any fragmentation. 767 */ 768 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 769 m = ieee80211_defrag(ni, m, hdrspace); 770 if (m == NULL) { 771 /* Fragment dropped or frame not complete yet */ 772 goto out; 773 } 774 } 775 wh = NULL; /* no longer valid, catch any uses */ 776 777 /* 778 * Next strip any MSDU crypto bits. 779 */ 780 if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) { 781 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 782 ni->ni_macaddr, "data", "%s", "demic error"); 783 vap->iv_stats.is_rx_demicfail++; 784 IEEE80211_NODE_STAT(ni, rx_demicfail); 785 goto out; 786 } 787 788 /* copy to listener after decrypt */ 789 if (ieee80211_radiotap_active_vap(vap)) 790 ieee80211_radiotap_rx(vap, m); 791 need_tap = 0; 792 793 /* 794 * Finally, strip the 802.11 header. 795 */ 796 m = ieee80211_decap(vap, m, hdrspace); 797 if (m == NULL) { 798 /* XXX mask bit to check for both */ 799 /* don't count Null data frames as errors */ 800 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 801 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 802 goto out; 803 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 804 ni->ni_macaddr, "data", "%s", "decap error"); 805 vap->iv_stats.is_rx_decap++; 806 IEEE80211_NODE_STAT(ni, rx_decap); 807 goto err; 808 } 809 eh = mtod(m, struct ether_header *); 810 if (!ieee80211_node_is_authorized(ni)) { 811 /* 812 * Deny any non-PAE frames received prior to 813 * authorization. For open/shared-key 814 * authentication the port is mark authorized 815 * after authentication completes. For 802.1x 816 * the port is not marked authorized by the 817 * authenticator until the handshake has completed. 818 */ 819 if (eh->ether_type != htons(ETHERTYPE_PAE)) { 820 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 821 eh->ether_shost, "data", 822 "unauthorized port: ether type 0x%x len %u", 823 eh->ether_type, m->m_pkthdr.len); 824 vap->iv_stats.is_rx_unauth++; 825 IEEE80211_NODE_STAT(ni, rx_unauth); 826 goto err; 827 } 828 } else { 829 /* 830 * When denying unencrypted frames, discard 831 * any non-PAE frames received without encryption. 832 */ 833 if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && 834 (key == NULL && (m->m_flags & M_WEP) == 0) && 835 eh->ether_type != htons(ETHERTYPE_PAE)) { 836 /* 837 * Drop unencrypted frames. 838 */ 839 vap->iv_stats.is_rx_unencrypted++; 840 IEEE80211_NODE_STAT(ni, rx_unencrypted); 841 goto out; 842 } 843 } 844 /* XXX require HT? */ 845 if (qos & IEEE80211_QOS_AMSDU) { 846 m = ieee80211_decap_amsdu(ni, m); 847 if (m == NULL) 848 return IEEE80211_FC0_TYPE_DATA; 849 } else { 850#ifdef IEEE80211_SUPPORT_SUPERG 851 m = ieee80211_decap_fastframe(vap, ni, m); 852 if (m == NULL) 853 return IEEE80211_FC0_TYPE_DATA; 854#endif 855 } 856 ieee80211_deliver_data(vap, ni, m); 857 return IEEE80211_FC0_TYPE_DATA; 858 859 case IEEE80211_FC0_TYPE_MGT: 860 vap->iv_stats.is_rx_mgmt++; 861 IEEE80211_NODE_STAT(ni, rx_mgmt); 862 if (dir != IEEE80211_FC1_DIR_NODS) { 863 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 864 wh, "data", "incorrect dir 0x%x", dir); 865 vap->iv_stats.is_rx_wrongdir++; 866 goto err; 867 } 868 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 869 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 870 ni->ni_macaddr, "mgt", "too short: len %u", 871 m->m_pkthdr.len); 872 vap->iv_stats.is_rx_tooshort++; 873 goto out; 874 } 875#ifdef IEEE80211_DEBUG 876 if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) || 877 ieee80211_msg_dumppkts(vap)) { 878 if_printf(ifp, "received %s from %s rssi %d\n", 879 ieee80211_mgt_subtype_name[subtype >> 880 IEEE80211_FC0_SUBTYPE_SHIFT], 881 ether_sprintf(wh->i_addr2), rssi); 882 } 883#endif 884 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 885 if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) { 886 /* 887 * Only shared key auth frames with a challenge 888 * should be encrypted, discard all others. 889 */ 890 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 891 wh, ieee80211_mgt_subtype_name[subtype >> 892 IEEE80211_FC0_SUBTYPE_SHIFT], 893 "%s", "WEP set but not permitted"); 894 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 895 goto out; 896 } 897 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 898 /* 899 * Discard encrypted frames when privacy is off. 900 */ 901 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 902 wh, "mgt", "%s", "WEP set but PRIVACY off"); 903 vap->iv_stats.is_rx_noprivacy++; 904 goto out; 905 } 906 hdrspace = ieee80211_hdrspace(ic, wh); 907 key = ieee80211_crypto_decap(ni, m, hdrspace); 908 if (key == NULL) { 909 /* NB: stats+msgs handled in crypto_decap */ 910 goto out; 911 } 912 wh = mtod(m, struct ieee80211_frame *); 913 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 914 } 915 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf); 916 goto out; 917 918 case IEEE80211_FC0_TYPE_CTL: 919 vap->iv_stats.is_rx_ctl++; 920 IEEE80211_NODE_STAT(ni, rx_ctrl); 921 vap->iv_recv_ctl(ni, m, subtype); 922 goto out; 923 924 default: 925 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 926 wh, NULL, "bad frame type 0x%x", type); 927 /* should not come here */ 928 break; 929 } 930err: 931 ifp->if_ierrors++; 932out: 933 if (m != NULL) { 934 if (need_tap && ieee80211_radiotap_active_vap(vap)) 935 ieee80211_radiotap_rx(vap, m); 936 m_freem(m); 937 } 938 return type; 939} 940 941static void 942sta_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh, 943 int rssi, int nf, uint16_t seq, uint16_t status) 944{ 945 struct ieee80211vap *vap = ni->ni_vap; 946 947 if (ni->ni_authmode == IEEE80211_AUTH_SHARED) { 948 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 949 ni->ni_macaddr, "open auth", 950 "bad sta auth mode %u", ni->ni_authmode); 951 vap->iv_stats.is_rx_bad_auth++; /* XXX */ 952 return; 953 } 954 if (vap->iv_state != IEEE80211_S_AUTH || 955 seq != IEEE80211_AUTH_OPEN_RESPONSE) { 956 vap->iv_stats.is_rx_bad_auth++; 957 return; 958 } 959 if (status != 0) { 960 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 961 ni, "open auth failed (reason %d)", status); 962 vap->iv_stats.is_rx_auth_fail++; 963 vap->iv_stats.is_rx_authfail_code = status; 964 ieee80211_new_state(vap, IEEE80211_S_SCAN, 965 IEEE80211_SCAN_FAIL_STATUS); 966 } else 967 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 968} 969 970static void 971sta_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh, 972 uint8_t *frm, uint8_t *efrm, int rssi, int nf, 973 uint16_t seq, uint16_t status) 974{ 975 struct ieee80211vap *vap = ni->ni_vap; 976 uint8_t *challenge; 977 int estatus; 978 979 /* 980 * NB: this can happen as we allow pre-shared key 981 * authentication to be enabled w/o wep being turned 982 * on so that configuration of these can be done 983 * in any order. It may be better to enforce the 984 * ordering in which case this check would just be 985 * for sanity/consistency. 986 */ 987 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 988 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 989 ni->ni_macaddr, "shared key auth", 990 "%s", " PRIVACY is disabled"); 991 estatus = IEEE80211_STATUS_ALG; 992 goto bad; 993 } 994 /* 995 * Pre-shared key authentication is evil; accept 996 * it only if explicitly configured (it is supported 997 * mainly for compatibility with clients like OS X). 998 */ 999 if (ni->ni_authmode != IEEE80211_AUTH_AUTO && 1000 ni->ni_authmode != IEEE80211_AUTH_SHARED) { 1001 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1002 ni->ni_macaddr, "shared key auth", 1003 "bad sta auth mode %u", ni->ni_authmode); 1004 vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */ 1005 estatus = IEEE80211_STATUS_ALG; 1006 goto bad; 1007 } 1008 1009 challenge = NULL; 1010 if (frm + 1 < efrm) { 1011 if ((frm[1] + 2) > (efrm - frm)) { 1012 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1013 ni->ni_macaddr, "shared key auth", 1014 "ie %d/%d too long", 1015 frm[0], (frm[1] + 2) - (efrm - frm)); 1016 vap->iv_stats.is_rx_bad_auth++; 1017 estatus = IEEE80211_STATUS_CHALLENGE; 1018 goto bad; 1019 } 1020 if (*frm == IEEE80211_ELEMID_CHALLENGE) 1021 challenge = frm; 1022 frm += frm[1] + 2; 1023 } 1024 switch (seq) { 1025 case IEEE80211_AUTH_SHARED_CHALLENGE: 1026 case IEEE80211_AUTH_SHARED_RESPONSE: 1027 if (challenge == NULL) { 1028 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1029 ni->ni_macaddr, "shared key auth", 1030 "%s", "no challenge"); 1031 vap->iv_stats.is_rx_bad_auth++; 1032 estatus = IEEE80211_STATUS_CHALLENGE; 1033 goto bad; 1034 } 1035 if (challenge[1] != IEEE80211_CHALLENGE_LEN) { 1036 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1037 ni->ni_macaddr, "shared key auth", 1038 "bad challenge len %d", challenge[1]); 1039 vap->iv_stats.is_rx_bad_auth++; 1040 estatus = IEEE80211_STATUS_CHALLENGE; 1041 goto bad; 1042 } 1043 default: 1044 break; 1045 } 1046 if (vap->iv_state != IEEE80211_S_AUTH) 1047 return; 1048 switch (seq) { 1049 case IEEE80211_AUTH_SHARED_PASS: 1050 if (ni->ni_challenge != NULL) { 1051 free(ni->ni_challenge, M_80211_NODE); 1052 ni->ni_challenge = NULL; 1053 } 1054 if (status != 0) { 1055 IEEE80211_NOTE_FRAME(vap, 1056 IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, wh, 1057 "shared key auth failed (reason %d)", status); 1058 vap->iv_stats.is_rx_auth_fail++; 1059 vap->iv_stats.is_rx_authfail_code = status; 1060 return; 1061 } 1062 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 1063 break; 1064 case IEEE80211_AUTH_SHARED_CHALLENGE: 1065 if (!ieee80211_alloc_challenge(ni)) 1066 return; 1067 /* XXX could optimize by passing recvd challenge */ 1068 memcpy(ni->ni_challenge, &challenge[2], challenge[1]); 1069 IEEE80211_SEND_MGMT(ni, 1070 IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 1071 break; 1072 default: 1073 IEEE80211_DISCARD(vap, IEEE80211_MSG_AUTH, 1074 wh, "shared key auth", "bad seq %d", seq); 1075 vap->iv_stats.is_rx_bad_auth++; 1076 return; 1077 } 1078 return; 1079bad: 1080 /* 1081 * Kick the state machine. This short-circuits 1082 * using the mgt frame timeout to trigger the 1083 * state transition. 1084 */ 1085 if (vap->iv_state == IEEE80211_S_AUTH) 1086 ieee80211_new_state(vap, IEEE80211_S_SCAN, 1087 IEEE80211_SCAN_FAIL_STATUS); 1088} 1089 1090int 1091ieee80211_parse_wmeparams(struct ieee80211vap *vap, uint8_t *frm, 1092 const struct ieee80211_frame *wh) 1093{ 1094#define MS(_v, _f) (((_v) & _f) >> _f##_S) 1095 struct ieee80211_wme_state *wme = &vap->iv_ic->ic_wme; 1096 u_int len = frm[1], qosinfo; 1097 int i; 1098 1099 if (len < sizeof(struct ieee80211_wme_param)-2) { 1100 IEEE80211_DISCARD_IE(vap, 1101 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WME, 1102 wh, "WME", "too short, len %u", len); 1103 return -1; 1104 } 1105 qosinfo = frm[__offsetof(struct ieee80211_wme_param, param_qosInfo)]; 1106 qosinfo &= WME_QOSINFO_COUNT; 1107 /* XXX do proper check for wraparound */ 1108 if (qosinfo == wme->wme_wmeChanParams.cap_info) 1109 return 0; 1110 frm += __offsetof(struct ieee80211_wme_param, params_acParams); 1111 for (i = 0; i < WME_NUM_AC; i++) { 1112 struct wmeParams *wmep = 1113 &wme->wme_wmeChanParams.cap_wmeParams[i]; 1114 /* NB: ACI not used */ 1115 wmep->wmep_acm = MS(frm[0], WME_PARAM_ACM); 1116 wmep->wmep_aifsn = MS(frm[0], WME_PARAM_AIFSN); 1117 wmep->wmep_logcwmin = MS(frm[1], WME_PARAM_LOGCWMIN); 1118 wmep->wmep_logcwmax = MS(frm[1], WME_PARAM_LOGCWMAX); 1119 wmep->wmep_txopLimit = LE_READ_2(frm+2); 1120 frm += 4; 1121 } 1122 wme->wme_wmeChanParams.cap_info = qosinfo; 1123 return 1; 1124#undef MS 1125} 1126 1127/* 1128 * Process 11h Channel Switch Announcement (CSA) ie. If this 1129 * is the first CSA then initiate the switch. Otherwise we 1130 * track state and trigger completion and/or cancel of the switch. 1131 * XXX should be public for IBSS use 1132 */ 1133static void 1134ieee80211_parse_csaparams(struct ieee80211vap *vap, uint8_t *frm, 1135 const struct ieee80211_frame *wh) 1136{ 1137 struct ieee80211com *ic = vap->iv_ic; 1138 const struct ieee80211_csa_ie *csa = 1139 (const struct ieee80211_csa_ie *) frm; 1140 1141 KASSERT(vap->iv_state >= IEEE80211_S_RUN, 1142 ("state %s", ieee80211_state_name[vap->iv_state])); 1143 1144 if (csa->csa_mode > 1) { 1145 IEEE80211_DISCARD_IE(vap, 1146 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1147 wh, "CSA", "invalid mode %u", csa->csa_mode); 1148 return; 1149 } 1150 IEEE80211_LOCK(ic); 1151 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 1152 /* 1153 * Convert the channel number to a channel reference. We 1154 * try first to preserve turbo attribute of the current 1155 * channel then fallback. Note this will not work if the 1156 * CSA specifies a channel that requires a band switch (e.g. 1157 * 11a => 11g). This is intentional as 11h is defined only 1158 * for 5GHz/11a and because the switch does not involve a 1159 * reassociation, protocol state (capabilities, negotated 1160 * rates, etc) may/will be wrong. 1161 */ 1162 struct ieee80211_channel *c = 1163 ieee80211_find_channel_byieee(ic, csa->csa_newchan, 1164 (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALLTURBO)); 1165 if (c == NULL) { 1166 c = ieee80211_find_channel_byieee(ic, 1167 csa->csa_newchan, 1168 (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALL)); 1169 if (c == NULL) { 1170 IEEE80211_DISCARD_IE(vap, 1171 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1172 wh, "CSA", "invalid channel %u", 1173 csa->csa_newchan); 1174 goto done; 1175 } 1176 } 1177#if IEEE80211_CSA_COUNT_MIN > 0 1178 if (csa->csa_count < IEEE80211_CSA_COUNT_MIN) { 1179 /* 1180 * Require at least IEEE80211_CSA_COUNT_MIN count to 1181 * reduce the risk of being redirected by a fabricated 1182 * CSA. If a valid CSA is dropped we'll still get a 1183 * beacon miss when the AP leaves the channel so we'll 1184 * eventually follow to the new channel. 1185 * 1186 * NOTE: this violates the 11h spec that states that 1187 * count may be any value and if 0 then a switch 1188 * should happen asap. 1189 */ 1190 IEEE80211_DISCARD_IE(vap, 1191 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1192 wh, "CSA", "count %u too small, must be >= %u", 1193 csa->csa_count, IEEE80211_CSA_COUNT_MIN); 1194 goto done; 1195 } 1196#endif 1197 ieee80211_csa_startswitch(ic, c, csa->csa_mode, csa->csa_count); 1198 } else { 1199 /* 1200 * Validate this ie against the initial CSA. We require 1201 * mode and channel not change and the count must be 1202 * monotonically decreasing. This may be pointless and 1203 * canceling the switch as a result may be too paranoid but 1204 * in the worst case if we drop out of CSA because of this 1205 * and the AP does move then we'll just end up taking a 1206 * beacon miss and scan to find the AP. 1207 * 1208 * XXX may want <= on count as we also process ProbeResp 1209 * frames and those may come in w/ the same count as the 1210 * previous beacon; but doing so leaves us open to a stuck 1211 * count until we add a dead-man timer 1212 */ 1213 if (!(csa->csa_count < ic->ic_csa_count && 1214 csa->csa_mode == ic->ic_csa_mode && 1215 csa->csa_newchan == ieee80211_chan2ieee(ic, ic->ic_csa_newchan))) { 1216 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_DOTH, wh, 1217 "CSA ie mismatch, initial ie <%d,%d,%d>, " 1218 "this ie <%d,%d,%d>", ic->ic_csa_mode, 1219 ic->ic_csa_newchan, ic->ic_csa_count, 1220 csa->csa_mode, csa->csa_newchan, csa->csa_count); 1221 ieee80211_csa_cancelswitch(ic); 1222 } else { 1223 if (csa->csa_count <= 1) 1224 ieee80211_csa_completeswitch(ic); 1225 else 1226 ic->ic_csa_count = csa->csa_count; 1227 } 1228 } 1229done: 1230 IEEE80211_UNLOCK(ic); 1231} 1232 1233/* 1234 * Return non-zero if a background scan may be continued: 1235 * o bg scan is active 1236 * o no channel switch is pending 1237 * o there has not been any traffic recently 1238 * 1239 * Note we do not check if there is an administrative enable; 1240 * this is only done to start the scan. We assume that any 1241 * change in state will be accompanied by a request to cancel 1242 * active scans which will otherwise cause this test to fail. 1243 */ 1244static __inline int 1245contbgscan(struct ieee80211vap *vap) 1246{ 1247 struct ieee80211com *ic = vap->iv_ic; 1248 1249 return ((ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN) && 1250 (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && 1251 vap->iv_state == IEEE80211_S_RUN && /* XXX? */ 1252 time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)); 1253} 1254 1255/* 1256 * Return non-zero if a backgrond scan may be started: 1257 * o bg scanning is administratively enabled 1258 * o no channel switch is pending 1259 * o we are not boosted on a dynamic turbo channel 1260 * o there has not been a scan recently 1261 * o there has not been any traffic recently 1262 */ 1263static __inline int 1264startbgscan(struct ieee80211vap *vap) 1265{ 1266 struct ieee80211com *ic = vap->iv_ic; 1267 1268 return ((vap->iv_flags & IEEE80211_F_BGSCAN) && 1269 (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && 1270#ifdef IEEE80211_SUPPORT_SUPERG 1271 !IEEE80211_IS_CHAN_DTURBO(ic->ic_curchan) && 1272#endif 1273 time_after(ticks, ic->ic_lastscan + vap->iv_bgscanintvl) && 1274 time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)); 1275} 1276 1277static void 1278sta_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, 1279 int subtype, int rssi, int nf) 1280{ 1281#define ISPROBE(_st) ((_st) == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1282#define ISREASSOC(_st) ((_st) == IEEE80211_FC0_SUBTYPE_REASSOC_RESP) 1283 struct ieee80211vap *vap = ni->ni_vap; 1284 struct ieee80211com *ic = ni->ni_ic; 1285 struct ieee80211_frame *wh; 1286 uint8_t *frm, *efrm; 1287 uint8_t *rates, *xrates, *wme, *htcap, *htinfo; 1288 uint8_t rate; 1289 int ht_state_change = 0; 1290 1291 wh = mtod(m0, struct ieee80211_frame *); 1292 frm = (uint8_t *)&wh[1]; 1293 efrm = mtod(m0, uint8_t *) + m0->m_len; 1294 switch (subtype) { 1295 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1296 case IEEE80211_FC0_SUBTYPE_BEACON: { 1297 struct ieee80211_scanparams scan; 1298 /* 1299 * We process beacon/probe response frames: 1300 * o when scanning, or 1301 * o station mode when associated (to collect state 1302 * updates such as 802.11g slot time) 1303 * Frames otherwise received are discarded. 1304 */ 1305 if (!((ic->ic_flags & IEEE80211_F_SCAN) || ni->ni_associd)) { 1306 vap->iv_stats.is_rx_mgtdiscard++; 1307 return; 1308 } 1309 /* XXX probe response in sta mode when !scanning? */ 1310 if (ieee80211_parse_beacon(ni, m0, &scan) != 0) { 1311 if (! (ic->ic_flags & IEEE80211_F_SCAN)) 1312 vap->iv_stats.is_beacon_bad++; 1313 return; 1314 } 1315 /* 1316 * Count frame now that we know it's to be processed. 1317 */ 1318 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1319 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1320 IEEE80211_NODE_STAT(ni, rx_beacons); 1321 } else 1322 IEEE80211_NODE_STAT(ni, rx_proberesp); 1323 /* 1324 * When operating in station mode, check for state updates. 1325 * Be careful to ignore beacons received while doing a 1326 * background scan. We consider only 11g/WMM stuff right now. 1327 */ 1328 if (ni->ni_associd != 0 && 1329 ((ic->ic_flags & IEEE80211_F_SCAN) == 0 || 1330 IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_bssid))) { 1331 /* record tsf of last beacon */ 1332 memcpy(ni->ni_tstamp.data, scan.tstamp, 1333 sizeof(ni->ni_tstamp)); 1334 /* count beacon frame for s/w bmiss handling */ 1335 vap->iv_swbmiss_count++; 1336 vap->iv_bmiss_count = 0; 1337 if (ni->ni_erp != scan.erp) { 1338 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1339 wh->i_addr2, 1340 "erp change: was 0x%x, now 0x%x", 1341 ni->ni_erp, scan.erp); 1342 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1343 (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) 1344 ic->ic_flags |= IEEE80211_F_USEPROT; 1345 else 1346 ic->ic_flags &= ~IEEE80211_F_USEPROT; 1347 ni->ni_erp = scan.erp; 1348 /* XXX statistic */ 1349 /* XXX driver notification */ 1350 } 1351 if ((ni->ni_capinfo ^ scan.capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME) { 1352 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1353 wh->i_addr2, 1354 "capabilities change: was 0x%x, now 0x%x", 1355 ni->ni_capinfo, scan.capinfo); 1356 /* 1357 * NB: we assume short preamble doesn't 1358 * change dynamically 1359 */ 1360 ieee80211_set_shortslottime(ic, 1361 IEEE80211_IS_CHAN_A(ic->ic_bsschan) || 1362 (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1363 ni->ni_capinfo = (ni->ni_capinfo &~ IEEE80211_CAPINFO_SHORT_SLOTTIME) 1364 | (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME); 1365 /* XXX statistic */ 1366 } 1367 if (scan.wme != NULL && 1368 (ni->ni_flags & IEEE80211_NODE_QOS) && 1369 ieee80211_parse_wmeparams(vap, scan.wme, wh) > 0) 1370 ieee80211_wme_updateparams(vap); 1371#ifdef IEEE80211_SUPPORT_SUPERG 1372 if (scan.ath != NULL) 1373 ieee80211_parse_athparams(ni, scan.ath, wh); 1374#endif 1375 if (scan.htcap != NULL && scan.htinfo != NULL && 1376 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1377 /* XXX state changes? */ 1378 if (ieee80211_ht_updateparams(ni, 1379 scan.htcap, scan.htinfo)) 1380 ht_state_change = 1; 1381 } 1382 if (scan.quiet) 1383 ic->ic_set_quiet(ni, scan.quiet); 1384 if (scan.tim != NULL) { 1385 struct ieee80211_tim_ie *tim = 1386 (struct ieee80211_tim_ie *) scan.tim; 1387#if 0 1388 int aid = IEEE80211_AID(ni->ni_associd); 1389 int ix = aid / NBBY; 1390 int min = tim->tim_bitctl &~ 1; 1391 int max = tim->tim_len + min - 4; 1392 if ((tim->tim_bitctl&1) || 1393 (min <= ix && ix <= max && 1394 isset(tim->tim_bitmap - min, aid))) { 1395 /* 1396 * XXX Do not let bg scan kick off 1397 * we are expecting data. 1398 */ 1399 ic->ic_lastdata = ticks; 1400 vap->iv_sta_ps(vap, 0); 1401 } 1402#endif 1403 ni->ni_dtim_count = tim->tim_count; 1404 ni->ni_dtim_period = tim->tim_period; 1405 } 1406 if (scan.csa != NULL && 1407 (vap->iv_flags & IEEE80211_F_DOTH)) 1408 ieee80211_parse_csaparams(vap, scan.csa, wh); 1409 else if (ic->ic_flags & IEEE80211_F_CSAPENDING) { 1410 /* 1411 * No CSA ie or 11h disabled, but a channel 1412 * switch is pending; drop out so we aren't 1413 * stuck in CSA state. If the AP really is 1414 * moving we'll get a beacon miss and scan. 1415 */ 1416 IEEE80211_LOCK(ic); 1417 ieee80211_csa_cancelswitch(ic); 1418 IEEE80211_UNLOCK(ic); 1419 } 1420 /* 1421 * If scanning, pass the info to the scan module. 1422 * Otherwise, check if it's the right time to do 1423 * a background scan. Background scanning must 1424 * be enabled and we must not be operating in the 1425 * turbo phase of dynamic turbo mode. Then, 1426 * it's been a while since the last background 1427 * scan and if no data frames have come through 1428 * recently, kick off a scan. Note that this 1429 * is the mechanism by which a background scan 1430 * is started _and_ continued each time we 1431 * return on-channel to receive a beacon from 1432 * our ap. 1433 */ 1434 if (ic->ic_flags & IEEE80211_F_SCAN) { 1435 ieee80211_add_scan(vap, &scan, wh, 1436 subtype, rssi, nf); 1437 } else if (contbgscan(vap)) { 1438 ieee80211_bg_scan(vap, 0); 1439 } else if (startbgscan(vap)) { 1440 vap->iv_stats.is_scan_bg++; 1441#if 0 1442 /* wakeup if we are sleeing */ 1443 ieee80211_set_pwrsave(vap, 0); 1444#endif 1445 ieee80211_bg_scan(vap, 0); 1446 } 1447 1448 /* 1449 * If we've had a channel width change (eg HT20<->HT40) 1450 * then schedule a delayed driver notification. 1451 */ 1452 if (ht_state_change) 1453 ieee80211_update_chw(ic); 1454 return; 1455 } 1456 /* 1457 * If scanning, just pass information to the scan module. 1458 */ 1459 if (ic->ic_flags & IEEE80211_F_SCAN) { 1460 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1461 /* 1462 * Actively scanning a channel marked passive; 1463 * send a probe request now that we know there 1464 * is 802.11 traffic present. 1465 * 1466 * XXX check if the beacon we recv'd gives 1467 * us what we need and suppress the probe req 1468 */ 1469 ieee80211_probe_curchan(vap, 1); 1470 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1471 } 1472 ieee80211_add_scan(vap, &scan, wh, subtype, rssi, nf); 1473 return; 1474 } 1475 break; 1476 } 1477 1478 case IEEE80211_FC0_SUBTYPE_AUTH: { 1479 uint16_t algo, seq, status; 1480 /* 1481 * auth frame format 1482 * [2] algorithm 1483 * [2] sequence 1484 * [2] status 1485 * [tlv*] challenge 1486 */ 1487 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1488 algo = le16toh(*(uint16_t *)frm); 1489 seq = le16toh(*(uint16_t *)(frm + 2)); 1490 status = le16toh(*(uint16_t *)(frm + 4)); 1491 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2, 1492 "recv auth frame with algorithm %d seq %d", algo, seq); 1493 1494 if (vap->iv_flags & IEEE80211_F_COUNTERM) { 1495 IEEE80211_DISCARD(vap, 1496 IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO, 1497 wh, "auth", "%s", "TKIP countermeasures enabled"); 1498 vap->iv_stats.is_rx_auth_countermeasures++; 1499 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 1500 ieee80211_send_error(ni, wh->i_addr2, 1501 IEEE80211_FC0_SUBTYPE_AUTH, 1502 IEEE80211_REASON_MIC_FAILURE); 1503 } 1504 return; 1505 } 1506 if (algo == IEEE80211_AUTH_ALG_SHARED) 1507 sta_auth_shared(ni, wh, frm + 6, efrm, rssi, nf, 1508 seq, status); 1509 else if (algo == IEEE80211_AUTH_ALG_OPEN) 1510 sta_auth_open(ni, wh, rssi, nf, seq, status); 1511 else { 1512 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1513 wh, "auth", "unsupported alg %d", algo); 1514 vap->iv_stats.is_rx_auth_unsupported++; 1515 return; 1516 } 1517 break; 1518 } 1519 1520 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 1521 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: { 1522 uint16_t capinfo, associd; 1523 uint16_t status; 1524 1525 if (vap->iv_state != IEEE80211_S_ASSOC) { 1526 vap->iv_stats.is_rx_mgtdiscard++; 1527 return; 1528 } 1529 1530 /* 1531 * asresp frame format 1532 * [2] capability information 1533 * [2] status 1534 * [2] association ID 1535 * [tlv] supported rates 1536 * [tlv] extended supported rates 1537 * [tlv] WME 1538 * [tlv] HT capabilities 1539 * [tlv] HT info 1540 */ 1541 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1542 ni = vap->iv_bss; 1543 capinfo = le16toh(*(uint16_t *)frm); 1544 frm += 2; 1545 status = le16toh(*(uint16_t *)frm); 1546 frm += 2; 1547 if (status != 0) { 1548 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1549 wh->i_addr2, "%sassoc failed (reason %d)", 1550 ISREASSOC(subtype) ? "re" : "", status); 1551 vap->iv_stats.is_rx_auth_fail++; /* XXX */ 1552 return; 1553 } 1554 associd = le16toh(*(uint16_t *)frm); 1555 frm += 2; 1556 1557 rates = xrates = wme = htcap = htinfo = NULL; 1558 while (efrm - frm > 1) { 1559 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1560 switch (*frm) { 1561 case IEEE80211_ELEMID_RATES: 1562 rates = frm; 1563 break; 1564 case IEEE80211_ELEMID_XRATES: 1565 xrates = frm; 1566 break; 1567 case IEEE80211_ELEMID_HTCAP: 1568 htcap = frm; 1569 break; 1570 case IEEE80211_ELEMID_HTINFO: 1571 htinfo = frm; 1572 break; 1573 case IEEE80211_ELEMID_VENDOR: 1574 if (iswmeoui(frm)) 1575 wme = frm; 1576 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) { 1577 /* 1578 * Accept pre-draft HT ie's if the 1579 * standard ones have not been seen. 1580 */ 1581 if (ishtcapoui(frm)) { 1582 if (htcap == NULL) 1583 htcap = frm; 1584 } else if (ishtinfooui(frm)) { 1585 if (htinfo == NULL) 1586 htinfo = frm; 1587 } 1588 } 1589 /* XXX Atheros OUI support */ 1590 break; 1591 } 1592 frm += frm[1] + 2; 1593 } 1594 1595 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1596 if (xrates != NULL) 1597 IEEE80211_VERIFY_ELEMENT(xrates, 1598 IEEE80211_RATE_MAXSIZE - rates[1], return); 1599 rate = ieee80211_setup_rates(ni, rates, xrates, 1600 IEEE80211_F_JOIN | 1601 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1602 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1603 if (rate & IEEE80211_RATE_BASIC) { 1604 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1605 wh->i_addr2, 1606 "%sassoc failed (rate set mismatch)", 1607 ISREASSOC(subtype) ? "re" : ""); 1608 vap->iv_stats.is_rx_assoc_norate++; 1609 ieee80211_new_state(vap, IEEE80211_S_SCAN, 1610 IEEE80211_SCAN_FAIL_STATUS); 1611 return; 1612 } 1613 1614 ni->ni_capinfo = capinfo; 1615 ni->ni_associd = associd; 1616 if (ni->ni_jointime == 0) 1617 ni->ni_jointime = time_uptime; 1618 if (wme != NULL && 1619 ieee80211_parse_wmeparams(vap, wme, wh) >= 0) { 1620 ni->ni_flags |= IEEE80211_NODE_QOS; 1621 ieee80211_wme_updateparams(vap); 1622 } else 1623 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1624 /* 1625 * Setup HT state according to the negotiation. 1626 * 1627 * NB: shouldn't need to check if HT use is enabled but some 1628 * ap's send back HT ie's even when we don't indicate we 1629 * are HT capable in our AssocReq. 1630 */ 1631 if (htcap != NULL && htinfo != NULL && 1632 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1633 ieee80211_ht_node_init(ni); 1634 ieee80211_ht_updateparams(ni, htcap, htinfo); 1635 ieee80211_setup_htrates(ni, htcap, 1636 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1637 ieee80211_setup_basic_htrates(ni, htinfo); 1638 ieee80211_node_setuptxparms(ni); 1639 ieee80211_ratectl_node_init(ni); 1640 } else { 1641#ifdef IEEE80211_SUPPORT_SUPERG 1642 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_ATH)) 1643 ieee80211_ff_node_init(ni); 1644#endif 1645 } 1646 /* 1647 * Configure state now that we are associated. 1648 * 1649 * XXX may need different/additional driver callbacks? 1650 */ 1651 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) || 1652 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1653 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 1654 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 1655 } else { 1656 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 1657 ic->ic_flags |= IEEE80211_F_USEBARKER; 1658 } 1659 ieee80211_set_shortslottime(ic, 1660 IEEE80211_IS_CHAN_A(ic->ic_curchan) || 1661 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1662 /* 1663 * Honor ERP protection. 1664 * 1665 * NB: ni_erp should zero for non-11g operation. 1666 */ 1667 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1668 (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) 1669 ic->ic_flags |= IEEE80211_F_USEPROT; 1670 else 1671 ic->ic_flags &= ~IEEE80211_F_USEPROT; 1672 IEEE80211_NOTE_MAC(vap, 1673 IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, wh->i_addr2, 1674 "%sassoc success at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 1675 ISREASSOC(subtype) ? "re" : "", 1676 IEEE80211_NODE_AID(ni), 1677 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 1678 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 1679 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "", 1680 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 1681 ni->ni_flags & IEEE80211_NODE_HT ? 1682 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 1683 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 1684 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 1685 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 1686 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 1687 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 1688 ", fast-frames" : "", 1689 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 1690 ", turbo" : "" 1691 ); 1692 ieee80211_new_state(vap, IEEE80211_S_RUN, subtype); 1693 break; 1694 } 1695 1696 case IEEE80211_FC0_SUBTYPE_DEAUTH: { 1697 uint16_t reason; 1698 1699 if (vap->iv_state == IEEE80211_S_SCAN) { 1700 vap->iv_stats.is_rx_mgtdiscard++; 1701 return; 1702 } 1703 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 1704 /* NB: can happen when in promiscuous mode */ 1705 vap->iv_stats.is_rx_mgtdiscard++; 1706 break; 1707 } 1708 1709 /* 1710 * deauth frame format 1711 * [2] reason 1712 */ 1713 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 1714 reason = le16toh(*(uint16_t *)frm); 1715 1716 vap->iv_stats.is_rx_deauth++; 1717 vap->iv_stats.is_rx_deauth_code = reason; 1718 IEEE80211_NODE_STAT(ni, rx_deauth); 1719 1720 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 1721 "recv deauthenticate (reason %d)", reason); 1722 ieee80211_new_state(vap, IEEE80211_S_AUTH, 1723 (reason << 8) | IEEE80211_FC0_SUBTYPE_DEAUTH); 1724 break; 1725 } 1726 1727 case IEEE80211_FC0_SUBTYPE_DISASSOC: { 1728 uint16_t reason; 1729 1730 if (vap->iv_state != IEEE80211_S_RUN && 1731 vap->iv_state != IEEE80211_S_ASSOC && 1732 vap->iv_state != IEEE80211_S_AUTH) { 1733 vap->iv_stats.is_rx_mgtdiscard++; 1734 return; 1735 } 1736 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 1737 /* NB: can happen when in promiscuous mode */ 1738 vap->iv_stats.is_rx_mgtdiscard++; 1739 break; 1740 } 1741 1742 /* 1743 * disassoc frame format 1744 * [2] reason 1745 */ 1746 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 1747 reason = le16toh(*(uint16_t *)frm); 1748 1749 vap->iv_stats.is_rx_disassoc++; 1750 vap->iv_stats.is_rx_disassoc_code = reason; 1751 IEEE80211_NODE_STAT(ni, rx_disassoc); 1752 1753 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 1754 "recv disassociate (reason %d)", reason); 1755 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 1756 break; 1757 } 1758 1759 case IEEE80211_FC0_SUBTYPE_ACTION: 1760 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 1761 if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 1762 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1763 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1764 wh, NULL, "%s", "not for us"); 1765 vap->iv_stats.is_rx_mgtdiscard++; 1766 } else if (vap->iv_state != IEEE80211_S_RUN) { 1767 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1768 wh, NULL, "wrong state %s", 1769 ieee80211_state_name[vap->iv_state]); 1770 vap->iv_stats.is_rx_mgtdiscard++; 1771 } else { 1772 if (ieee80211_parse_action(ni, m0) == 0) 1773 (void)ic->ic_recv_action(ni, wh, frm, efrm); 1774 } 1775 break; 1776 1777 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1778 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 1779 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1780 case IEEE80211_FC0_SUBTYPE_ATIM: 1781 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1782 wh, NULL, "%s", "not handled"); 1783 vap->iv_stats.is_rx_mgtdiscard++; 1784 break; 1785 1786 default: 1787 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1788 wh, "mgt", "subtype 0x%x not handled", subtype); 1789 vap->iv_stats.is_rx_badsubtype++; 1790 break; 1791 } 1792#undef ISREASSOC 1793#undef ISPROBE 1794} 1795 1796static void 1797sta_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 1798{ 1799 switch (subtype) { 1800 case IEEE80211_FC0_SUBTYPE_BAR: 1801 ieee80211_recv_bar(ni, m); 1802 break; 1803 } 1804} 1805