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: releng/11.0/sys/net80211/ieee80211_sta.c 300232 2016-05-19 21:08:33Z avos $"); 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 *, 74 const struct ieee80211_rx_stats *, int, int); 75static void sta_recv_mgmt(struct ieee80211_node *, struct mbuf *, 76 int subtype, const struct ieee80211_rx_stats *, int rssi, int nf); 77static void sta_recv_ctl(struct ieee80211_node *, struct mbuf *, int subtype); 78 79void 80ieee80211_sta_attach(struct ieee80211com *ic) 81{ 82 ic->ic_vattach[IEEE80211_M_STA] = sta_vattach; 83} 84 85void 86ieee80211_sta_detach(struct ieee80211com *ic) 87{ 88} 89 90static void 91sta_vdetach(struct ieee80211vap *vap) 92{ 93} 94 95static void 96sta_vattach(struct ieee80211vap *vap) 97{ 98 vap->iv_newstate = sta_newstate; 99 vap->iv_input = sta_input; 100 vap->iv_recv_mgmt = sta_recv_mgmt; 101 vap->iv_recv_ctl = sta_recv_ctl; 102 vap->iv_opdetach = sta_vdetach; 103 vap->iv_bmiss = sta_beacon_miss; 104} 105 106/* 107 * Handle a beacon miss event. The common code filters out 108 * spurious events that can happen when scanning and/or before 109 * reaching RUN state. 110 */ 111static void 112sta_beacon_miss(struct ieee80211vap *vap) 113{ 114 struct ieee80211com *ic = vap->iv_ic; 115 116 IEEE80211_LOCK_ASSERT(ic); 117 118 KASSERT((ic->ic_flags & IEEE80211_F_SCAN) == 0, ("scanning")); 119 KASSERT(vap->iv_state >= IEEE80211_S_RUN, 120 ("wrong state %s", ieee80211_state_name[vap->iv_state])); 121 122 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 123 "beacon miss, mode %s state %s\n", 124 ieee80211_opmode_name[vap->iv_opmode], 125 ieee80211_state_name[vap->iv_state]); 126 127 if (vap->iv_state == IEEE80211_S_CSA) { 128 /* 129 * A Channel Switch is pending; assume we missed the 130 * beacon that would've completed the process and just 131 * force the switch. If we made a mistake we'll not 132 * find the AP on the new channel and fall back to a 133 * normal scan. 134 */ 135 ieee80211_csa_completeswitch(ic); 136 return; 137 } 138 if (++vap->iv_bmiss_count < vap->iv_bmiss_max) { 139 /* 140 * Send a directed probe req before falling back to a 141 * scan; if we receive a response ic_bmiss_count will 142 * be reset. Some cards mistakenly report beacon miss 143 * so this avoids the expensive scan if the ap is 144 * still there. 145 */ 146 ieee80211_send_probereq(vap->iv_bss, vap->iv_myaddr, 147 vap->iv_bss->ni_bssid, vap->iv_bss->ni_bssid, 148 vap->iv_bss->ni_essid, vap->iv_bss->ni_esslen); 149 return; 150 } 151 152 callout_stop(&vap->iv_swbmiss); 153 vap->iv_bmiss_count = 0; 154 vap->iv_stats.is_beacon_miss++; 155 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 156#ifdef IEEE80211_SUPPORT_SUPERG 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 208static void 209sta_swbmiss_start(struct ieee80211vap *vap) 210{ 211 212 if (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS) { 213 /* 214 * Start s/w beacon miss timer for devices w/o 215 * hardware support. We fudge a bit here since 216 * we're doing this in software. 217 */ 218 vap->iv_swbmiss_period = IEEE80211_TU_TO_TICKS( 219 2 * vap->iv_bmissthreshold * vap->iv_bss->ni_intval); 220 vap->iv_swbmiss_count = 0; 221 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, 222 ieee80211_swbmiss, vap); 223 } 224} 225 226/* 227 * IEEE80211_M_STA vap state machine handler. 228 * This routine handles the main states in the 802.11 protocol. 229 */ 230static int 231sta_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 232{ 233 struct ieee80211com *ic = vap->iv_ic; 234 struct ieee80211_node *ni; 235 enum ieee80211_state ostate; 236 237 IEEE80211_LOCK_ASSERT(ic); 238 239 ostate = vap->iv_state; 240 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 241 __func__, ieee80211_state_name[ostate], 242 ieee80211_state_name[nstate], arg); 243 vap->iv_state = nstate; /* state transition */ 244 callout_stop(&vap->iv_mgtsend); /* XXX callout_drain */ 245 if (ostate != IEEE80211_S_SCAN) 246 ieee80211_cancel_scan(vap); /* background scan */ 247 ni = vap->iv_bss; /* NB: no reference held */ 248 if (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS) 249 callout_stop(&vap->iv_swbmiss); 250 switch (nstate) { 251 case IEEE80211_S_INIT: 252 switch (ostate) { 253 case IEEE80211_S_SLEEP: 254 /* XXX wakeup */ 255 /* XXX driver hook to wakeup the hardware? */ 256 case IEEE80211_S_RUN: 257 IEEE80211_SEND_MGMT(ni, 258 IEEE80211_FC0_SUBTYPE_DISASSOC, 259 IEEE80211_REASON_ASSOC_LEAVE); 260 ieee80211_sta_leave(ni); 261 break; 262 case IEEE80211_S_ASSOC: 263 IEEE80211_SEND_MGMT(ni, 264 IEEE80211_FC0_SUBTYPE_DEAUTH, 265 IEEE80211_REASON_AUTH_LEAVE); 266 break; 267 case IEEE80211_S_SCAN: 268 ieee80211_cancel_scan(vap); 269 break; 270 default: 271 break; 272 } 273 if (ostate != IEEE80211_S_INIT) { 274 /* NB: optimize INIT -> INIT case */ 275 ieee80211_reset_bss(vap); 276 } 277 if (vap->iv_auth->ia_detach != NULL) 278 vap->iv_auth->ia_detach(vap); 279 break; 280 case IEEE80211_S_SCAN: 281 switch (ostate) { 282 case IEEE80211_S_INIT: 283 /* 284 * Initiate a scan. We can come here as a result 285 * of an IEEE80211_IOC_SCAN_REQ too in which case 286 * the vap will be marked with IEEE80211_FEXT_SCANREQ 287 * and the scan request parameters will be present 288 * in iv_scanreq. Otherwise we do the default. 289 */ 290 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 291 ieee80211_check_scan(vap, 292 vap->iv_scanreq_flags, 293 vap->iv_scanreq_duration, 294 vap->iv_scanreq_mindwell, 295 vap->iv_scanreq_maxdwell, 296 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 297 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 298 } else 299 ieee80211_check_scan_current(vap); 300 break; 301 case IEEE80211_S_SCAN: 302 case IEEE80211_S_AUTH: 303 case IEEE80211_S_ASSOC: 304 /* 305 * These can happen either because of a timeout 306 * on an assoc/auth response or because of a 307 * change in state that requires a reset. For 308 * the former we're called with a non-zero arg 309 * that is the cause for the failure; pass this 310 * to the scan code so it can update state. 311 * Otherwise trigger a new scan unless we're in 312 * manual roaming mode in which case an application 313 * must issue an explicit scan request. 314 */ 315 if (arg != 0) 316 ieee80211_scan_assoc_fail(vap, 317 vap->iv_bss->ni_macaddr, arg); 318 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 319 ieee80211_check_scan_current(vap); 320 break; 321 case IEEE80211_S_SLEEP: /* beacon miss */ 322 /* 323 * XXX if in sleep we need to wakeup the hardware. 324 */ 325 /* FALLTHROUGH */ 326 case IEEE80211_S_RUN: /* beacon miss */ 327 /* 328 * Beacon miss. Notify user space and if not 329 * under control of a user application (roaming 330 * manual) kick off a scan to re-connect. 331 */ 332 333 ieee80211_sta_leave(ni); 334 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 335 ieee80211_check_scan_current(vap); 336 break; 337 default: 338 goto invalid; 339 } 340 break; 341 case IEEE80211_S_AUTH: 342 switch (ostate) { 343 case IEEE80211_S_INIT: 344 case IEEE80211_S_SCAN: 345 IEEE80211_SEND_MGMT(ni, 346 IEEE80211_FC0_SUBTYPE_AUTH, 1); 347 break; 348 case IEEE80211_S_AUTH: 349 case IEEE80211_S_ASSOC: 350 switch (arg & 0xff) { 351 case IEEE80211_FC0_SUBTYPE_AUTH: 352 /* ??? */ 353 IEEE80211_SEND_MGMT(ni, 354 IEEE80211_FC0_SUBTYPE_AUTH, 2); 355 break; 356 case IEEE80211_FC0_SUBTYPE_DEAUTH: 357 sta_authretry(vap, ni, arg>>8); 358 break; 359 } 360 break; 361 case IEEE80211_S_SLEEP: 362 case IEEE80211_S_RUN: 363 switch (arg & 0xff) { 364 case IEEE80211_FC0_SUBTYPE_AUTH: 365 IEEE80211_SEND_MGMT(ni, 366 IEEE80211_FC0_SUBTYPE_AUTH, 2); 367 vap->iv_state = IEEE80211_S_RUN; /* stay RUN */ 368 break; 369 case IEEE80211_FC0_SUBTYPE_DEAUTH: 370 ieee80211_sta_leave(ni); 371 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 372 /* try to reauth */ 373 IEEE80211_SEND_MGMT(ni, 374 IEEE80211_FC0_SUBTYPE_AUTH, 1); 375 } 376 break; 377 } 378 break; 379 default: 380 goto invalid; 381 } 382 break; 383 case IEEE80211_S_ASSOC: 384 switch (ostate) { 385 case IEEE80211_S_AUTH: 386 case IEEE80211_S_ASSOC: 387 IEEE80211_SEND_MGMT(ni, 388 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 389 break; 390 case IEEE80211_S_SLEEP: /* cannot happen */ 391 case IEEE80211_S_RUN: 392 ieee80211_sta_leave(ni); 393 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 394 IEEE80211_SEND_MGMT(ni, arg ? 395 IEEE80211_FC0_SUBTYPE_REASSOC_REQ : 396 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 397 } 398 break; 399 default: 400 goto invalid; 401 } 402 break; 403 case IEEE80211_S_RUN: 404 if (vap->iv_flags & IEEE80211_F_WPA) { 405 /* XXX validate prerequisites */ 406 } 407 switch (ostate) { 408 case IEEE80211_S_RUN: 409 case IEEE80211_S_CSA: 410 break; 411 case IEEE80211_S_AUTH: /* when join is done in fw */ 412 case IEEE80211_S_ASSOC: 413#ifdef IEEE80211_DEBUG 414 if (ieee80211_msg_debug(vap)) { 415 ieee80211_note(vap, "%s with %s ssid ", 416 (vap->iv_opmode == IEEE80211_M_STA ? 417 "associated" : "synchronized"), 418 ether_sprintf(ni->ni_bssid)); 419 ieee80211_print_essid(vap->iv_bss->ni_essid, 420 ni->ni_esslen); 421 /* XXX MCS/HT */ 422 printf(" channel %d start %uMb\n", 423 ieee80211_chan2ieee(ic, ic->ic_curchan), 424 IEEE80211_RATE2MBS(ni->ni_txrate)); 425 } 426#endif 427 ieee80211_scan_assoc_success(vap, ni->ni_macaddr); 428 ieee80211_notify_node_join(ni, 429 arg == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 430 break; 431 case IEEE80211_S_SLEEP: 432 /* Wake up from sleep */ 433 vap->iv_sta_ps(vap, 0); 434 break; 435 default: 436 goto invalid; 437 } 438 ieee80211_sync_curchan(ic); 439 if (ostate != IEEE80211_S_RUN) 440 sta_swbmiss_start(vap); 441 /* 442 * When 802.1x is not in use mark the port authorized 443 * at this point so traffic can flow. 444 */ 445 if (ni->ni_authmode != IEEE80211_AUTH_8021X) 446 ieee80211_node_authorize(ni); 447 /* 448 * Fake association when joining an existing bss. 449 * 450 * Don't do this if we're doing SLEEP->RUN. 451 */ 452 if (ic->ic_newassoc != NULL && ostate != IEEE80211_S_SLEEP) 453 ic->ic_newassoc(vap->iv_bss, (ostate != IEEE80211_S_RUN)); 454 break; 455 case IEEE80211_S_CSA: 456 if (ostate != IEEE80211_S_RUN) 457 goto invalid; 458 break; 459 case IEEE80211_S_SLEEP: 460 sta_swbmiss_start(vap); 461 vap->iv_sta_ps(vap, 1); 462 break; 463 default: 464 invalid: 465 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 466 "%s: unexpected state transition %s -> %s\n", __func__, 467 ieee80211_state_name[ostate], ieee80211_state_name[nstate]); 468 break; 469 } 470 return 0; 471} 472 473/* 474 * Return non-zero if the frame is an echo of a multicast 475 * frame sent by ourself. The dir is known to be DSTODS. 476 */ 477static __inline int 478isdstods_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh) 479{ 480#define QWH4(wh) ((const struct ieee80211_qosframe_addr4 *)wh) 481#define WH4(wh) ((const struct ieee80211_frame_addr4 *)wh) 482 const uint8_t *sa; 483 484 KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode")); 485 486 if (!IEEE80211_IS_MULTICAST(wh->i_addr3)) 487 return 0; 488 sa = IEEE80211_QOS_HAS_SEQ(wh) ? QWH4(wh)->i_addr4 : WH4(wh)->i_addr4; 489 return IEEE80211_ADDR_EQ(sa, vap->iv_myaddr); 490#undef WH4 491#undef QWH4 492} 493 494/* 495 * Return non-zero if the frame is an echo of a multicast 496 * frame sent by ourself. The dir is known to be FROMDS. 497 */ 498static __inline int 499isfromds_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh) 500{ 501 KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode")); 502 503 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) 504 return 0; 505 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 506} 507 508/* 509 * Decide if a received management frame should be 510 * printed when debugging is enabled. This filters some 511 * of the less interesting frames that come frequently 512 * (e.g. beacons). 513 */ 514static __inline int 515doprint(struct ieee80211vap *vap, int subtype) 516{ 517 switch (subtype) { 518 case IEEE80211_FC0_SUBTYPE_BEACON: 519 return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN); 520 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 521 return 0; 522 } 523 return 1; 524} 525 526/* 527 * Process a received frame. The node associated with the sender 528 * should be supplied. If nothing was found in the node table then 529 * the caller is assumed to supply a reference to iv_bss instead. 530 * The RSSI and a timestamp are also supplied. The RSSI data is used 531 * during AP scanning to select a AP to associate with; it can have 532 * any units so long as values have consistent units and higher values 533 * mean ``better signal''. The receive timestamp is currently not used 534 * by the 802.11 layer. 535 */ 536static int 537sta_input(struct ieee80211_node *ni, struct mbuf *m, 538 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 539{ 540 struct ieee80211vap *vap = ni->ni_vap; 541 struct ieee80211com *ic = ni->ni_ic; 542 struct ifnet *ifp = vap->iv_ifp; 543 struct ieee80211_frame *wh; 544 struct ieee80211_key *key; 545 struct ether_header *eh; 546 int hdrspace, need_tap = 1; /* mbuf need to be tapped. */ 547 uint8_t dir, type, subtype, qos; 548 uint8_t *bssid; 549 550 if (m->m_flags & M_AMPDU_MPDU) { 551 /* 552 * Fastpath for A-MPDU reorder q resubmission. Frames 553 * w/ M_AMPDU_MPDU marked have already passed through 554 * here but were received out of order and been held on 555 * the reorder queue. When resubmitted they are marked 556 * with the M_AMPDU_MPDU flag and we can bypass most of 557 * the normal processing. 558 */ 559 wh = mtod(m, struct ieee80211_frame *); 560 type = IEEE80211_FC0_TYPE_DATA; 561 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 562 subtype = IEEE80211_FC0_SUBTYPE_QOS; 563 hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ 564 goto resubmit_ampdu; 565 } 566 567 KASSERT(ni != NULL, ("null node")); 568 ni->ni_inact = ni->ni_inact_reload; 569 570 type = -1; /* undefined */ 571 572 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 573 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 574 ni->ni_macaddr, NULL, 575 "too short (1): len %u", m->m_pkthdr.len); 576 vap->iv_stats.is_rx_tooshort++; 577 goto out; 578 } 579 /* 580 * Bit of a cheat here, we use a pointer for a 3-address 581 * frame format but don't reference fields past outside 582 * ieee80211_frame_min w/o first validating the data is 583 * present. 584 */ 585 wh = mtod(m, struct ieee80211_frame *); 586 587 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 588 IEEE80211_FC0_VERSION_0) { 589 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 590 ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x", 591 wh->i_fc[0], wh->i_fc[1]); 592 vap->iv_stats.is_rx_badversion++; 593 goto err; 594 } 595 596 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 597 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 598 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 599 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 600 bssid = wh->i_addr2; 601 if (!IEEE80211_ADDR_EQ(bssid, ni->ni_bssid)) { 602 /* not interested in */ 603 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 604 bssid, NULL, "%s", "not to bss"); 605 vap->iv_stats.is_rx_wrongbss++; 606 goto out; 607 } 608 609 /* 610 * Some devices may be in a promiscuous mode 611 * where they receive frames for multiple station 612 * addresses. 613 * 614 * If we receive a data frame that isn't 615 * destined to our VAP MAC, drop it. 616 * 617 * XXX TODO: This is only enforced when not scanning; 618 * XXX it assumes a software-driven scan will put the NIC 619 * XXX into a "no data frames" mode before setting this 620 * XXX flag. Otherwise it may be possible that we'll still 621 * XXX process data frames whilst scanning. 622 */ 623 if ((! IEEE80211_IS_MULTICAST(wh->i_addr1)) 624 && (! IEEE80211_ADDR_EQ(wh->i_addr1, IF_LLADDR(ifp)))) { 625 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 626 bssid, NULL, "not to cur sta: lladdr=%6D, addr1=%6D", 627 IF_LLADDR(ifp), ":", wh->i_addr1, ":"); 628 vap->iv_stats.is_rx_wrongbss++; 629 goto out; 630 } 631 632 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 633 ni->ni_noise = nf; 634 if ( IEEE80211_HAS_SEQ(type, subtype) && 635 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 636 uint8_t tid = ieee80211_gettid(wh); 637 if (IEEE80211_QOS_HAS_SEQ(wh) && 638 TID_TO_WME_AC(tid) >= WME_AC_VI) 639 ic->ic_wme.wme_hipri_traffic++; 640 if (! ieee80211_check_rxseq(ni, wh, bssid)) 641 goto out; 642 } 643 } 644 645 switch (type) { 646 case IEEE80211_FC0_TYPE_DATA: 647 hdrspace = ieee80211_hdrspace(ic, wh); 648 if (m->m_len < hdrspace && 649 (m = m_pullup(m, hdrspace)) == NULL) { 650 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 651 ni->ni_macaddr, NULL, 652 "data too short: expecting %u", hdrspace); 653 vap->iv_stats.is_rx_tooshort++; 654 goto out; /* XXX */ 655 } 656 /* 657 * Handle A-MPDU re-ordering. If the frame is to be 658 * processed directly then ieee80211_ampdu_reorder 659 * will return 0; otherwise it has consumed the mbuf 660 * and we should do nothing more with it. 661 */ 662 if ((m->m_flags & M_AMPDU) && 663 (dir == IEEE80211_FC1_DIR_FROMDS || 664 dir == IEEE80211_FC1_DIR_DSTODS) && 665 ieee80211_ampdu_reorder(ni, m) != 0) { 666 m = NULL; 667 goto out; 668 } 669 resubmit_ampdu: 670 if (dir == IEEE80211_FC1_DIR_FROMDS) { 671 if ((ifp->if_flags & IFF_SIMPLEX) && 672 isfromds_mcastecho(vap, wh)) { 673 /* 674 * In IEEE802.11 network, multicast 675 * packets sent from "me" are broadcast 676 * from the AP; silently discard for 677 * SIMPLEX interface. 678 */ 679 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 680 wh, "data", "%s", "multicast echo"); 681 vap->iv_stats.is_rx_mcastecho++; 682 goto out; 683 } 684 if ((vap->iv_flags & IEEE80211_F_DWDS) && 685 IEEE80211_IS_MULTICAST(wh->i_addr1)) { 686 /* 687 * DWDS sta's must drop 3-address mcast frames 688 * as they will be sent separately as a 4-addr 689 * frame. Accepting the 3-addr frame will 690 * confuse the bridge into thinking the sending 691 * sta is located at the end of WDS link. 692 */ 693 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 694 "3-address data", "%s", "DWDS enabled"); 695 vap->iv_stats.is_rx_mcastecho++; 696 goto out; 697 } 698 } else if (dir == IEEE80211_FC1_DIR_DSTODS) { 699 if ((vap->iv_flags & IEEE80211_F_DWDS) == 0) { 700 IEEE80211_DISCARD(vap, 701 IEEE80211_MSG_INPUT, wh, "4-address data", 702 "%s", "DWDS not enabled"); 703 vap->iv_stats.is_rx_wrongdir++; 704 goto out; 705 } 706 if ((ifp->if_flags & IFF_SIMPLEX) && 707 isdstods_mcastecho(vap, wh)) { 708 /* 709 * In IEEE802.11 network, multicast 710 * packets sent from "me" are broadcast 711 * from the AP; silently discard for 712 * SIMPLEX interface. 713 */ 714 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 715 "4-address data", "%s", "multicast echo"); 716 vap->iv_stats.is_rx_mcastecho++; 717 goto out; 718 } 719 } else { 720 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 721 "data", "incorrect dir 0x%x", dir); 722 vap->iv_stats.is_rx_wrongdir++; 723 goto out; 724 } 725 726 /* 727 * Handle privacy requirements. Note that we 728 * must not be preempted from here until after 729 * we (potentially) call ieee80211_crypto_demic; 730 * otherwise we may violate assumptions in the 731 * crypto cipher modules used to do delayed update 732 * of replay sequence numbers. 733 */ 734 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 735 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 736 /* 737 * Discard encrypted frames when privacy is off. 738 */ 739 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 740 wh, "WEP", "%s", "PRIVACY off"); 741 vap->iv_stats.is_rx_noprivacy++; 742 IEEE80211_NODE_STAT(ni, rx_noprivacy); 743 goto out; 744 } 745 key = ieee80211_crypto_decap(ni, m, hdrspace); 746 if (key == NULL) { 747 /* NB: stats+msgs handled in crypto_decap */ 748 IEEE80211_NODE_STAT(ni, rx_wepfail); 749 goto out; 750 } 751 wh = mtod(m, struct ieee80211_frame *); 752 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 753 } else { 754 /* XXX M_WEP and IEEE80211_F_PRIVACY */ 755 key = NULL; 756 } 757 758 /* 759 * Save QoS bits for use below--before we strip the header. 760 */ 761 if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { 762 qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? 763 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : 764 ((struct ieee80211_qosframe *)wh)->i_qos[0]; 765 } else 766 qos = 0; 767 768 /* 769 * Next up, any fragmentation. 770 */ 771 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 772 m = ieee80211_defrag(ni, m, hdrspace); 773 if (m == NULL) { 774 /* Fragment dropped or frame not complete yet */ 775 goto out; 776 } 777 } 778 wh = NULL; /* no longer valid, catch any uses */ 779 780 /* 781 * Next strip any MSDU crypto bits. 782 */ 783 if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) { 784 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 785 ni->ni_macaddr, "data", "%s", "demic error"); 786 vap->iv_stats.is_rx_demicfail++; 787 IEEE80211_NODE_STAT(ni, rx_demicfail); 788 goto out; 789 } 790 791 /* copy to listener after decrypt */ 792 if (ieee80211_radiotap_active_vap(vap)) 793 ieee80211_radiotap_rx(vap, m); 794 need_tap = 0; 795 796 /* 797 * Finally, strip the 802.11 header. 798 */ 799 m = ieee80211_decap(vap, m, hdrspace); 800 if (m == NULL) { 801 /* XXX mask bit to check for both */ 802 /* don't count Null data frames as errors */ 803 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 804 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 805 goto out; 806 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 807 ni->ni_macaddr, "data", "%s", "decap error"); 808 vap->iv_stats.is_rx_decap++; 809 IEEE80211_NODE_STAT(ni, rx_decap); 810 goto err; 811 } 812 eh = mtod(m, struct ether_header *); 813 if (!ieee80211_node_is_authorized(ni)) { 814 /* 815 * Deny any non-PAE frames received prior to 816 * authorization. For open/shared-key 817 * authentication the port is mark authorized 818 * after authentication completes. For 802.1x 819 * the port is not marked authorized by the 820 * authenticator until the handshake has completed. 821 */ 822 if (eh->ether_type != htons(ETHERTYPE_PAE)) { 823 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 824 eh->ether_shost, "data", 825 "unauthorized port: ether type 0x%x len %u", 826 eh->ether_type, m->m_pkthdr.len); 827 vap->iv_stats.is_rx_unauth++; 828 IEEE80211_NODE_STAT(ni, rx_unauth); 829 goto err; 830 } 831 } else { 832 /* 833 * When denying unencrypted frames, discard 834 * any non-PAE frames received without encryption. 835 */ 836 if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && 837 (key == NULL && (m->m_flags & M_WEP) == 0) && 838 eh->ether_type != htons(ETHERTYPE_PAE)) { 839 /* 840 * Drop unencrypted frames. 841 */ 842 vap->iv_stats.is_rx_unencrypted++; 843 IEEE80211_NODE_STAT(ni, rx_unencrypted); 844 goto out; 845 } 846 } 847 /* XXX require HT? */ 848 if (qos & IEEE80211_QOS_AMSDU) { 849 m = ieee80211_decap_amsdu(ni, m); 850 if (m == NULL) 851 return IEEE80211_FC0_TYPE_DATA; 852 } else { 853#ifdef IEEE80211_SUPPORT_SUPERG 854 m = ieee80211_decap_fastframe(vap, ni, m); 855 if (m == NULL) 856 return IEEE80211_FC0_TYPE_DATA; 857#endif 858 } 859 ieee80211_deliver_data(vap, ni, m); 860 return IEEE80211_FC0_TYPE_DATA; 861 862 case IEEE80211_FC0_TYPE_MGT: 863 vap->iv_stats.is_rx_mgmt++; 864 IEEE80211_NODE_STAT(ni, rx_mgmt); 865 if (dir != IEEE80211_FC1_DIR_NODS) { 866 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 867 wh, "data", "incorrect dir 0x%x", dir); 868 vap->iv_stats.is_rx_wrongdir++; 869 goto err; 870 } 871 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 872 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 873 ni->ni_macaddr, "mgt", "too short: len %u", 874 m->m_pkthdr.len); 875 vap->iv_stats.is_rx_tooshort++; 876 goto out; 877 } 878#ifdef IEEE80211_DEBUG 879 if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) || 880 ieee80211_msg_dumppkts(vap)) { 881 if_printf(ifp, "received %s from %s rssi %d\n", 882 ieee80211_mgt_subtype_name(subtype), 883 ether_sprintf(wh->i_addr2), rssi); 884 } 885#endif 886 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 887 if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) { 888 /* 889 * Only shared key auth frames with a challenge 890 * should be encrypted, discard all others. 891 */ 892 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 893 wh, ieee80211_mgt_subtype_name(subtype), 894 "%s", "WEP set but not permitted"); 895 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 896 goto out; 897 } 898 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 899 /* 900 * Discard encrypted frames when privacy is off. 901 */ 902 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 903 wh, "mgt", "%s", "WEP set but PRIVACY off"); 904 vap->iv_stats.is_rx_noprivacy++; 905 goto out; 906 } 907 hdrspace = ieee80211_hdrspace(ic, wh); 908 key = ieee80211_crypto_decap(ni, m, hdrspace); 909 if (key == NULL) { 910 /* NB: stats+msgs handled in crypto_decap */ 911 goto out; 912 } 913 wh = mtod(m, struct ieee80211_frame *); 914 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 915 } 916 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); 917 goto out; 918 919 case IEEE80211_FC0_TYPE_CTL: 920 vap->iv_stats.is_rx_ctl++; 921 IEEE80211_NODE_STAT(ni, rx_ctrl); 922 vap->iv_recv_ctl(ni, m, subtype); 923 goto out; 924 925 default: 926 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 927 wh, NULL, "bad frame type 0x%x", type); 928 /* should not come here */ 929 break; 930 } 931err: 932 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 933out: 934 if (m != NULL) { 935 if (need_tap && ieee80211_radiotap_active_vap(vap)) 936 ieee80211_radiotap_rx(vap, m); 937 m_freem(m); 938 } 939 return type; 940} 941 942static void 943sta_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh, 944 int rssi, int nf, uint16_t seq, uint16_t status) 945{ 946 struct ieee80211vap *vap = ni->ni_vap; 947 948 if (ni->ni_authmode == IEEE80211_AUTH_SHARED) { 949 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 950 ni->ni_macaddr, "open auth", 951 "bad sta auth mode %u", ni->ni_authmode); 952 vap->iv_stats.is_rx_bad_auth++; /* XXX */ 953 return; 954 } 955 if (vap->iv_state != IEEE80211_S_AUTH || 956 seq != IEEE80211_AUTH_OPEN_RESPONSE) { 957 vap->iv_stats.is_rx_bad_auth++; 958 return; 959 } 960 if (status != 0) { 961 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 962 ni, "open auth failed (reason %d)", status); 963 vap->iv_stats.is_rx_auth_fail++; 964 vap->iv_stats.is_rx_authfail_code = status; 965 ieee80211_new_state(vap, IEEE80211_S_SCAN, 966 IEEE80211_SCAN_FAIL_STATUS); 967 } else 968 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 969} 970 971static void 972sta_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh, 973 uint8_t *frm, uint8_t *efrm, int rssi, int nf, 974 uint16_t seq, uint16_t status) 975{ 976 struct ieee80211vap *vap = ni->ni_vap; 977 uint8_t *challenge; 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 goto bad; 992 } 993 /* 994 * Pre-shared key authentication is evil; accept 995 * it only if explicitly configured (it is supported 996 * mainly for compatibility with clients like OS X). 997 */ 998 if (ni->ni_authmode != IEEE80211_AUTH_AUTO && 999 ni->ni_authmode != IEEE80211_AUTH_SHARED) { 1000 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1001 ni->ni_macaddr, "shared key auth", 1002 "bad sta auth mode %u", ni->ni_authmode); 1003 vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */ 1004 goto bad; 1005 } 1006 1007 challenge = NULL; 1008 if (frm + 1 < efrm) { 1009 if ((frm[1] + 2) > (efrm - frm)) { 1010 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1011 ni->ni_macaddr, "shared key auth", 1012 "ie %d/%d too long", 1013 frm[0], (frm[1] + 2) - (efrm - frm)); 1014 vap->iv_stats.is_rx_bad_auth++; 1015 goto bad; 1016 } 1017 if (*frm == IEEE80211_ELEMID_CHALLENGE) 1018 challenge = frm; 1019 frm += frm[1] + 2; 1020 } 1021 switch (seq) { 1022 case IEEE80211_AUTH_SHARED_CHALLENGE: 1023 case IEEE80211_AUTH_SHARED_RESPONSE: 1024 if (challenge == NULL) { 1025 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1026 ni->ni_macaddr, "shared key auth", 1027 "%s", "no challenge"); 1028 vap->iv_stats.is_rx_bad_auth++; 1029 goto bad; 1030 } 1031 if (challenge[1] != IEEE80211_CHALLENGE_LEN) { 1032 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1033 ni->ni_macaddr, "shared key auth", 1034 "bad challenge len %d", challenge[1]); 1035 vap->iv_stats.is_rx_bad_auth++; 1036 goto bad; 1037 } 1038 default: 1039 break; 1040 } 1041 if (vap->iv_state != IEEE80211_S_AUTH) 1042 return; 1043 switch (seq) { 1044 case IEEE80211_AUTH_SHARED_PASS: 1045 if (ni->ni_challenge != NULL) { 1046 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 1047 ni->ni_challenge = NULL; 1048 } 1049 if (status != 0) { 1050 IEEE80211_NOTE_FRAME(vap, 1051 IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, wh, 1052 "shared key auth failed (reason %d)", status); 1053 vap->iv_stats.is_rx_auth_fail++; 1054 vap->iv_stats.is_rx_authfail_code = status; 1055 return; 1056 } 1057 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 1058 break; 1059 case IEEE80211_AUTH_SHARED_CHALLENGE: 1060 if (!ieee80211_alloc_challenge(ni)) 1061 return; 1062 /* XXX could optimize by passing recvd challenge */ 1063 memcpy(ni->ni_challenge, &challenge[2], challenge[1]); 1064 IEEE80211_SEND_MGMT(ni, 1065 IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 1066 break; 1067 default: 1068 IEEE80211_DISCARD(vap, IEEE80211_MSG_AUTH, 1069 wh, "shared key auth", "bad seq %d", seq); 1070 vap->iv_stats.is_rx_bad_auth++; 1071 return; 1072 } 1073 return; 1074bad: 1075 /* 1076 * Kick the state machine. This short-circuits 1077 * using the mgt frame timeout to trigger the 1078 * state transition. 1079 */ 1080 if (vap->iv_state == IEEE80211_S_AUTH) 1081 ieee80211_new_state(vap, IEEE80211_S_SCAN, 1082 IEEE80211_SCAN_FAIL_STATUS); 1083} 1084 1085int 1086ieee80211_parse_wmeparams(struct ieee80211vap *vap, uint8_t *frm, 1087 const struct ieee80211_frame *wh) 1088{ 1089#define MS(_v, _f) (((_v) & _f) >> _f##_S) 1090 struct ieee80211_wme_state *wme = &vap->iv_ic->ic_wme; 1091 u_int len = frm[1], qosinfo; 1092 int i; 1093 1094 if (len < sizeof(struct ieee80211_wme_param)-2) { 1095 IEEE80211_DISCARD_IE(vap, 1096 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WME, 1097 wh, "WME", "too short, len %u", len); 1098 return -1; 1099 } 1100 qosinfo = frm[__offsetof(struct ieee80211_wme_param, param_qosInfo)]; 1101 qosinfo &= WME_QOSINFO_COUNT; 1102 /* XXX do proper check for wraparound */ 1103 if (qosinfo == wme->wme_wmeChanParams.cap_info) 1104 return 0; 1105 frm += __offsetof(struct ieee80211_wme_param, params_acParams); 1106 for (i = 0; i < WME_NUM_AC; i++) { 1107 struct wmeParams *wmep = 1108 &wme->wme_wmeChanParams.cap_wmeParams[i]; 1109 /* NB: ACI not used */ 1110 wmep->wmep_acm = MS(frm[0], WME_PARAM_ACM); 1111 wmep->wmep_aifsn = MS(frm[0], WME_PARAM_AIFSN); 1112 wmep->wmep_logcwmin = MS(frm[1], WME_PARAM_LOGCWMIN); 1113 wmep->wmep_logcwmax = MS(frm[1], WME_PARAM_LOGCWMAX); 1114 wmep->wmep_txopLimit = le16dec(frm+2); 1115 frm += 4; 1116 } 1117 wme->wme_wmeChanParams.cap_info = qosinfo; 1118 return 1; 1119#undef MS 1120} 1121 1122/* 1123 * Process 11h Channel Switch Announcement (CSA) ie. If this 1124 * is the first CSA then initiate the switch. Otherwise we 1125 * track state and trigger completion and/or cancel of the switch. 1126 * XXX should be public for IBSS use 1127 */ 1128static void 1129ieee80211_parse_csaparams(struct ieee80211vap *vap, uint8_t *frm, 1130 const struct ieee80211_frame *wh) 1131{ 1132 struct ieee80211com *ic = vap->iv_ic; 1133 const struct ieee80211_csa_ie *csa = 1134 (const struct ieee80211_csa_ie *) frm; 1135 1136 KASSERT(vap->iv_state >= IEEE80211_S_RUN, 1137 ("state %s", ieee80211_state_name[vap->iv_state])); 1138 1139 if (csa->csa_mode > 1) { 1140 IEEE80211_DISCARD_IE(vap, 1141 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1142 wh, "CSA", "invalid mode %u", csa->csa_mode); 1143 return; 1144 } 1145 IEEE80211_LOCK(ic); 1146 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 1147 /* 1148 * Convert the channel number to a channel reference. We 1149 * try first to preserve turbo attribute of the current 1150 * channel then fallback. Note this will not work if the 1151 * CSA specifies a channel that requires a band switch (e.g. 1152 * 11a => 11g). This is intentional as 11h is defined only 1153 * for 5GHz/11a and because the switch does not involve a 1154 * reassociation, protocol state (capabilities, negotated 1155 * rates, etc) may/will be wrong. 1156 */ 1157 struct ieee80211_channel *c = 1158 ieee80211_find_channel_byieee(ic, csa->csa_newchan, 1159 (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALLTURBO)); 1160 if (c == NULL) { 1161 c = ieee80211_find_channel_byieee(ic, 1162 csa->csa_newchan, 1163 (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALL)); 1164 if (c == NULL) { 1165 IEEE80211_DISCARD_IE(vap, 1166 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1167 wh, "CSA", "invalid channel %u", 1168 csa->csa_newchan); 1169 goto done; 1170 } 1171 } 1172#if IEEE80211_CSA_COUNT_MIN > 0 1173 if (csa->csa_count < IEEE80211_CSA_COUNT_MIN) { 1174 /* 1175 * Require at least IEEE80211_CSA_COUNT_MIN count to 1176 * reduce the risk of being redirected by a fabricated 1177 * CSA. If a valid CSA is dropped we'll still get a 1178 * beacon miss when the AP leaves the channel so we'll 1179 * eventually follow to the new channel. 1180 * 1181 * NOTE: this violates the 11h spec that states that 1182 * count may be any value and if 0 then a switch 1183 * should happen asap. 1184 */ 1185 IEEE80211_DISCARD_IE(vap, 1186 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1187 wh, "CSA", "count %u too small, must be >= %u", 1188 csa->csa_count, IEEE80211_CSA_COUNT_MIN); 1189 goto done; 1190 } 1191#endif 1192 ieee80211_csa_startswitch(ic, c, csa->csa_mode, csa->csa_count); 1193 } else { 1194 /* 1195 * Validate this ie against the initial CSA. We require 1196 * mode and channel not change and the count must be 1197 * monotonically decreasing. This may be pointless and 1198 * canceling the switch as a result may be too paranoid but 1199 * in the worst case if we drop out of CSA because of this 1200 * and the AP does move then we'll just end up taking a 1201 * beacon miss and scan to find the AP. 1202 * 1203 * XXX may want <= on count as we also process ProbeResp 1204 * frames and those may come in w/ the same count as the 1205 * previous beacon; but doing so leaves us open to a stuck 1206 * count until we add a dead-man timer 1207 */ 1208 if (!(csa->csa_count < ic->ic_csa_count && 1209 csa->csa_mode == ic->ic_csa_mode && 1210 csa->csa_newchan == ieee80211_chan2ieee(ic, ic->ic_csa_newchan))) { 1211 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_DOTH, wh, 1212 "CSA ie mismatch, initial ie <%d,%d,%d>, " 1213 "this ie <%d,%d,%d>", ic->ic_csa_mode, 1214 ic->ic_csa_newchan, ic->ic_csa_count, 1215 csa->csa_mode, csa->csa_newchan, csa->csa_count); 1216 ieee80211_csa_cancelswitch(ic); 1217 } else { 1218 if (csa->csa_count <= 1) 1219 ieee80211_csa_completeswitch(ic); 1220 else 1221 ic->ic_csa_count = csa->csa_count; 1222 } 1223 } 1224done: 1225 IEEE80211_UNLOCK(ic); 1226} 1227 1228/* 1229 * Return non-zero if a background scan may be continued: 1230 * o bg scan is active 1231 * o no channel switch is pending 1232 * o there has not been any traffic recently 1233 * 1234 * Note we do not check if there is an administrative enable; 1235 * this is only done to start the scan. We assume that any 1236 * change in state will be accompanied by a request to cancel 1237 * active scans which will otherwise cause this test to fail. 1238 */ 1239static __inline int 1240contbgscan(struct ieee80211vap *vap) 1241{ 1242 struct ieee80211com *ic = vap->iv_ic; 1243 1244 return ((ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN) && 1245 (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && 1246 vap->iv_state == IEEE80211_S_RUN && /* XXX? */ 1247 ieee80211_time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)); 1248} 1249 1250/* 1251 * Return non-zero if a backgrond scan may be started: 1252 * o bg scanning is administratively enabled 1253 * o no channel switch is pending 1254 * o we are not boosted on a dynamic turbo channel 1255 * o there has not been a scan recently 1256 * o there has not been any traffic recently 1257 */ 1258static __inline int 1259startbgscan(struct ieee80211vap *vap) 1260{ 1261 struct ieee80211com *ic = vap->iv_ic; 1262 1263 return ((vap->iv_flags & IEEE80211_F_BGSCAN) && 1264 (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && 1265#ifdef IEEE80211_SUPPORT_SUPERG 1266 !IEEE80211_IS_CHAN_DTURBO(ic->ic_curchan) && 1267#endif 1268 ieee80211_time_after(ticks, ic->ic_lastscan + vap->iv_bgscanintvl) && 1269 ieee80211_time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)); 1270} 1271 1272static void 1273sta_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1274 const struct ieee80211_rx_stats *rxs, 1275 int rssi, int nf) 1276{ 1277#define ISREASSOC(_st) ((_st) == IEEE80211_FC0_SUBTYPE_REASSOC_RESP) 1278 struct ieee80211vap *vap = ni->ni_vap; 1279 struct ieee80211com *ic = ni->ni_ic; 1280 struct ieee80211_channel *rxchan = ic->ic_curchan; 1281 struct ieee80211_frame *wh; 1282 uint8_t *frm, *efrm; 1283 uint8_t *rates, *xrates, *wme, *htcap, *htinfo; 1284 uint8_t rate; 1285 int ht_state_change = 0; 1286 1287 wh = mtod(m0, struct ieee80211_frame *); 1288 frm = (uint8_t *)&wh[1]; 1289 efrm = mtod(m0, uint8_t *) + m0->m_len; 1290 switch (subtype) { 1291 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1292 case IEEE80211_FC0_SUBTYPE_BEACON: { 1293 struct ieee80211_scanparams scan; 1294 struct ieee80211_channel *c; 1295 /* 1296 * We process beacon/probe response frames: 1297 * o when scanning, or 1298 * o station mode when associated (to collect state 1299 * updates such as 802.11g slot time) 1300 * Frames otherwise received are discarded. 1301 */ 1302 if (!((ic->ic_flags & IEEE80211_F_SCAN) || ni->ni_associd)) { 1303 vap->iv_stats.is_rx_mgtdiscard++; 1304 return; 1305 } 1306 1307 /* Override RX channel as appropriate */ 1308 if (rxs != NULL) { 1309 c = ieee80211_lookup_channel_rxstatus(vap, rxs); 1310 if (c != NULL) 1311 rxchan = c; 1312 } 1313 1314 /* XXX probe response in sta mode when !scanning? */ 1315 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0) { 1316 if (! (ic->ic_flags & IEEE80211_F_SCAN)) 1317 vap->iv_stats.is_beacon_bad++; 1318 return; 1319 } 1320 1321 /* 1322 * Count frame now that we know it's to be processed. 1323 */ 1324 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1325 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1326 IEEE80211_NODE_STAT(ni, rx_beacons); 1327 } else 1328 IEEE80211_NODE_STAT(ni, rx_proberesp); 1329 /* 1330 * When operating in station mode, check for state updates. 1331 * Be careful to ignore beacons received while doing a 1332 * background scan. We consider only 11g/WMM stuff right now. 1333 */ 1334 if (ni->ni_associd != 0 && 1335 ((ic->ic_flags & IEEE80211_F_SCAN) == 0 || 1336 IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_bssid))) { 1337 /* record tsf of last beacon */ 1338 memcpy(ni->ni_tstamp.data, scan.tstamp, 1339 sizeof(ni->ni_tstamp)); 1340 /* count beacon frame for s/w bmiss handling */ 1341 vap->iv_swbmiss_count++; 1342 vap->iv_bmiss_count = 0; 1343 if (ni->ni_erp != scan.erp) { 1344 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1345 wh->i_addr2, 1346 "erp change: was 0x%x, now 0x%x", 1347 ni->ni_erp, scan.erp); 1348 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1349 (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) 1350 ic->ic_flags |= IEEE80211_F_USEPROT; 1351 else 1352 ic->ic_flags &= ~IEEE80211_F_USEPROT; 1353 ni->ni_erp = scan.erp; 1354 /* XXX statistic */ 1355 /* XXX driver notification */ 1356 } 1357 if ((ni->ni_capinfo ^ scan.capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME) { 1358 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1359 wh->i_addr2, 1360 "capabilities change: was 0x%x, now 0x%x", 1361 ni->ni_capinfo, scan.capinfo); 1362 /* 1363 * NB: we assume short preamble doesn't 1364 * change dynamically 1365 */ 1366 ieee80211_set_shortslottime(ic, 1367 IEEE80211_IS_CHAN_A(ic->ic_bsschan) || 1368 (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1369 ni->ni_capinfo = (ni->ni_capinfo &~ IEEE80211_CAPINFO_SHORT_SLOTTIME) 1370 | (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME); 1371 /* XXX statistic */ 1372 } 1373 if (scan.wme != NULL && 1374 (ni->ni_flags & IEEE80211_NODE_QOS) && 1375 ieee80211_parse_wmeparams(vap, scan.wme, wh) > 0) 1376 ieee80211_wme_updateparams(vap); 1377#ifdef IEEE80211_SUPPORT_SUPERG 1378 if (scan.ath != NULL) 1379 ieee80211_parse_athparams(ni, scan.ath, wh); 1380#endif 1381 if (scan.htcap != NULL && scan.htinfo != NULL && 1382 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1383 /* XXX state changes? */ 1384 if (ieee80211_ht_updateparams(ni, 1385 scan.htcap, scan.htinfo)) 1386 ht_state_change = 1; 1387 } 1388 if (scan.quiet) 1389 ic->ic_set_quiet(ni, scan.quiet); 1390 1391 if (scan.tim != NULL) { 1392 struct ieee80211_tim_ie *tim = 1393 (struct ieee80211_tim_ie *) scan.tim; 1394 /* 1395 * XXX Check/debug this code; see if it's about 1396 * the right time to force the VAP awake if we 1397 * receive a frame destined for us? 1398 */ 1399 int aid = IEEE80211_AID(ni->ni_associd); 1400 int ix = aid / NBBY; 1401 int min = tim->tim_bitctl &~ 1; 1402 int max = tim->tim_len + min - 4; 1403 int tim_ucast = 0, tim_mcast = 0; 1404 1405 /* 1406 * Only do this for unicast traffic in the TIM 1407 * The multicast traffic notification for 1408 * the scan notification stuff should occur 1409 * differently. 1410 */ 1411 if (min <= ix && ix <= max && 1412 isset(tim->tim_bitmap - min, aid)) { 1413 tim_ucast = 1; 1414 } 1415 1416 /* 1417 * Do a separate notification 1418 * for the multicast bit being set. 1419 */ 1420 if (tim->tim_bitctl & 1) { 1421 tim_mcast = 1; 1422 } 1423 1424 /* 1425 * If the TIM indicates there's traffic for 1426 * us then get us out of STA mode powersave. 1427 */ 1428 if (tim_ucast == 1) { 1429 1430 /* 1431 * Wake us out of SLEEP state if we're 1432 * in it; and if we're doing bgscan 1433 * then wake us out of STA powersave. 1434 */ 1435 ieee80211_sta_tim_notify(vap, 1); 1436 1437 /* 1438 * This is preventing us from 1439 * continuing a bgscan; because it 1440 * tricks the contbgscan() 1441 * routine to think there's always 1442 * traffic for us. 1443 * 1444 * I think we need both an RX and 1445 * TX ic_lastdata field. 1446 */ 1447 ic->ic_lastdata = ticks; 1448 } 1449 1450 ni->ni_dtim_count = tim->tim_count; 1451 ni->ni_dtim_period = tim->tim_period; 1452 } 1453 if (scan.csa != NULL && 1454 (vap->iv_flags & IEEE80211_F_DOTH)) 1455 ieee80211_parse_csaparams(vap, scan.csa, wh); 1456 else if (ic->ic_flags & IEEE80211_F_CSAPENDING) { 1457 /* 1458 * No CSA ie or 11h disabled, but a channel 1459 * switch is pending; drop out so we aren't 1460 * stuck in CSA state. If the AP really is 1461 * moving we'll get a beacon miss and scan. 1462 */ 1463 IEEE80211_LOCK(ic); 1464 ieee80211_csa_cancelswitch(ic); 1465 IEEE80211_UNLOCK(ic); 1466 } 1467 /* 1468 * If scanning, pass the info to the scan module. 1469 * Otherwise, check if it's the right time to do 1470 * a background scan. Background scanning must 1471 * be enabled and we must not be operating in the 1472 * turbo phase of dynamic turbo mode. Then, 1473 * it's been a while since the last background 1474 * scan and if no data frames have come through 1475 * recently, kick off a scan. Note that this 1476 * is the mechanism by which a background scan 1477 * is started _and_ continued each time we 1478 * return on-channel to receive a beacon from 1479 * our ap. 1480 */ 1481 if (ic->ic_flags & IEEE80211_F_SCAN) { 1482 ieee80211_add_scan(vap, rxchan, 1483 &scan, wh, subtype, rssi, nf); 1484 } else if (contbgscan(vap)) { 1485 ieee80211_bg_scan(vap, 0); 1486 } else if (startbgscan(vap)) { 1487 vap->iv_stats.is_scan_bg++; 1488#if 0 1489 /* wakeup if we are sleeing */ 1490 ieee80211_set_pwrsave(vap, 0); 1491#endif 1492 ieee80211_bg_scan(vap, 0); 1493 } 1494 1495 /* 1496 * Put the station to sleep if we haven't seen 1497 * traffic in a while. 1498 */ 1499 IEEE80211_LOCK(ic); 1500 ieee80211_sta_ps_timer_check(vap); 1501 IEEE80211_UNLOCK(ic); 1502 1503 /* 1504 * If we've had a channel width change (eg HT20<->HT40) 1505 * then schedule a delayed driver notification. 1506 */ 1507 if (ht_state_change) 1508 ieee80211_update_chw(ic); 1509 return; 1510 } 1511 /* 1512 * If scanning, just pass information to the scan module. 1513 */ 1514 if (ic->ic_flags & IEEE80211_F_SCAN) { 1515 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1516 /* 1517 * Actively scanning a channel marked passive; 1518 * send a probe request now that we know there 1519 * is 802.11 traffic present. 1520 * 1521 * XXX check if the beacon we recv'd gives 1522 * us what we need and suppress the probe req 1523 */ 1524 ieee80211_probe_curchan(vap, 1); 1525 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1526 } 1527 ieee80211_add_scan(vap, rxchan, &scan, wh, 1528 subtype, rssi, nf); 1529 return; 1530 } 1531 break; 1532 } 1533 1534 case IEEE80211_FC0_SUBTYPE_AUTH: { 1535 uint16_t algo, seq, status; 1536 /* 1537 * auth frame format 1538 * [2] algorithm 1539 * [2] sequence 1540 * [2] status 1541 * [tlv*] challenge 1542 */ 1543 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1544 algo = le16toh(*(uint16_t *)frm); 1545 seq = le16toh(*(uint16_t *)(frm + 2)); 1546 status = le16toh(*(uint16_t *)(frm + 4)); 1547 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2, 1548 "recv auth frame with algorithm %d seq %d", algo, seq); 1549 1550 if (vap->iv_flags & IEEE80211_F_COUNTERM) { 1551 IEEE80211_DISCARD(vap, 1552 IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO, 1553 wh, "auth", "%s", "TKIP countermeasures enabled"); 1554 vap->iv_stats.is_rx_auth_countermeasures++; 1555 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 1556 ieee80211_send_error(ni, wh->i_addr2, 1557 IEEE80211_FC0_SUBTYPE_AUTH, 1558 IEEE80211_REASON_MIC_FAILURE); 1559 } 1560 return; 1561 } 1562 if (algo == IEEE80211_AUTH_ALG_SHARED) 1563 sta_auth_shared(ni, wh, frm + 6, efrm, rssi, nf, 1564 seq, status); 1565 else if (algo == IEEE80211_AUTH_ALG_OPEN) 1566 sta_auth_open(ni, wh, rssi, nf, seq, status); 1567 else { 1568 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1569 wh, "auth", "unsupported alg %d", algo); 1570 vap->iv_stats.is_rx_auth_unsupported++; 1571 return; 1572 } 1573 break; 1574 } 1575 1576 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 1577 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: { 1578 uint16_t capinfo, associd; 1579 uint16_t status; 1580 1581 if (vap->iv_state != IEEE80211_S_ASSOC) { 1582 vap->iv_stats.is_rx_mgtdiscard++; 1583 return; 1584 } 1585 1586 /* 1587 * asresp frame format 1588 * [2] capability information 1589 * [2] status 1590 * [2] association ID 1591 * [tlv] supported rates 1592 * [tlv] extended supported rates 1593 * [tlv] WME 1594 * [tlv] HT capabilities 1595 * [tlv] HT info 1596 */ 1597 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1598 ni = vap->iv_bss; 1599 capinfo = le16toh(*(uint16_t *)frm); 1600 frm += 2; 1601 status = le16toh(*(uint16_t *)frm); 1602 frm += 2; 1603 if (status != 0) { 1604 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1605 wh->i_addr2, "%sassoc failed (reason %d)", 1606 ISREASSOC(subtype) ? "re" : "", status); 1607 vap->iv_stats.is_rx_auth_fail++; /* XXX */ 1608 return; 1609 } 1610 associd = le16toh(*(uint16_t *)frm); 1611 frm += 2; 1612 1613 rates = xrates = wme = htcap = htinfo = NULL; 1614 while (efrm - frm > 1) { 1615 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1616 switch (*frm) { 1617 case IEEE80211_ELEMID_RATES: 1618 rates = frm; 1619 break; 1620 case IEEE80211_ELEMID_XRATES: 1621 xrates = frm; 1622 break; 1623 case IEEE80211_ELEMID_HTCAP: 1624 htcap = frm; 1625 break; 1626 case IEEE80211_ELEMID_HTINFO: 1627 htinfo = frm; 1628 break; 1629 case IEEE80211_ELEMID_VENDOR: 1630 if (iswmeoui(frm)) 1631 wme = frm; 1632 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) { 1633 /* 1634 * Accept pre-draft HT ie's if the 1635 * standard ones have not been seen. 1636 */ 1637 if (ishtcapoui(frm)) { 1638 if (htcap == NULL) 1639 htcap = frm; 1640 } else if (ishtinfooui(frm)) { 1641 if (htinfo == NULL) 1642 htinfo = frm; 1643 } 1644 } 1645 /* XXX Atheros OUI support */ 1646 break; 1647 } 1648 frm += frm[1] + 2; 1649 } 1650 1651 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1652 if (xrates != NULL) 1653 IEEE80211_VERIFY_ELEMENT(xrates, 1654 IEEE80211_RATE_MAXSIZE - rates[1], return); 1655 rate = ieee80211_setup_rates(ni, rates, xrates, 1656 IEEE80211_F_JOIN | 1657 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1658 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1659 if (rate & IEEE80211_RATE_BASIC) { 1660 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1661 wh->i_addr2, 1662 "%sassoc failed (rate set mismatch)", 1663 ISREASSOC(subtype) ? "re" : ""); 1664 vap->iv_stats.is_rx_assoc_norate++; 1665 ieee80211_new_state(vap, IEEE80211_S_SCAN, 1666 IEEE80211_SCAN_FAIL_STATUS); 1667 return; 1668 } 1669 1670 ni->ni_capinfo = capinfo; 1671 ni->ni_associd = associd; 1672 if (ni->ni_jointime == 0) 1673 ni->ni_jointime = time_uptime; 1674 if (wme != NULL && 1675 ieee80211_parse_wmeparams(vap, wme, wh) >= 0) { 1676 ni->ni_flags |= IEEE80211_NODE_QOS; 1677 ieee80211_wme_updateparams(vap); 1678 } else 1679 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1680 /* 1681 * Setup HT state according to the negotiation. 1682 * 1683 * NB: shouldn't need to check if HT use is enabled but some 1684 * ap's send back HT ie's even when we don't indicate we 1685 * are HT capable in our AssocReq. 1686 */ 1687 if (htcap != NULL && htinfo != NULL && 1688 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1689 ieee80211_ht_node_init(ni); 1690 ieee80211_ht_updateparams(ni, htcap, htinfo); 1691 ieee80211_setup_htrates(ni, htcap, 1692 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1693 ieee80211_setup_basic_htrates(ni, htinfo); 1694 ieee80211_node_setuptxparms(ni); 1695 ieee80211_ratectl_node_init(ni); 1696 } 1697 1698 /* 1699 * Always initialise FF/superg state; we can use this 1700 * for doing A-MSDU encapsulation as well. 1701 */ 1702#ifdef IEEE80211_SUPPORT_SUPERG 1703 ieee80211_ff_node_init(ni); 1704#endif 1705 1706 /* 1707 * Configure state now that we are associated. 1708 * 1709 * XXX may need different/additional driver callbacks? 1710 */ 1711 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) || 1712 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1713 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 1714 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 1715 } else { 1716 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 1717 ic->ic_flags |= IEEE80211_F_USEBARKER; 1718 } 1719 ieee80211_set_shortslottime(ic, 1720 IEEE80211_IS_CHAN_A(ic->ic_curchan) || 1721 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1722 /* 1723 * Honor ERP protection. 1724 * 1725 * NB: ni_erp should zero for non-11g operation. 1726 */ 1727 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1728 (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) 1729 ic->ic_flags |= IEEE80211_F_USEPROT; 1730 else 1731 ic->ic_flags &= ~IEEE80211_F_USEPROT; 1732 IEEE80211_NOTE_MAC(vap, 1733 IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, wh->i_addr2, 1734 "%sassoc success at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 1735 ISREASSOC(subtype) ? "re" : "", 1736 IEEE80211_NODE_AID(ni), 1737 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 1738 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 1739 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "", 1740 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 1741 ni->ni_flags & IEEE80211_NODE_HT ? 1742 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 1743 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 1744 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 1745 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 1746 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 1747 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 1748 ", fast-frames" : "", 1749 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 1750 ", turbo" : "" 1751 ); 1752 ieee80211_new_state(vap, IEEE80211_S_RUN, subtype); 1753 break; 1754 } 1755 1756 case IEEE80211_FC0_SUBTYPE_DEAUTH: { 1757 uint16_t reason; 1758 1759 if (vap->iv_state == IEEE80211_S_SCAN) { 1760 vap->iv_stats.is_rx_mgtdiscard++; 1761 return; 1762 } 1763 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 1764 /* NB: can happen when in promiscuous mode */ 1765 vap->iv_stats.is_rx_mgtdiscard++; 1766 break; 1767 } 1768 1769 /* 1770 * deauth frame format 1771 * [2] reason 1772 */ 1773 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 1774 reason = le16toh(*(uint16_t *)frm); 1775 1776 vap->iv_stats.is_rx_deauth++; 1777 vap->iv_stats.is_rx_deauth_code = reason; 1778 IEEE80211_NODE_STAT(ni, rx_deauth); 1779 1780 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 1781 "recv deauthenticate (reason: %d (%s))", reason, 1782 ieee80211_reason_to_string(reason)); 1783 ieee80211_new_state(vap, IEEE80211_S_AUTH, 1784 (reason << 8) | IEEE80211_FC0_SUBTYPE_DEAUTH); 1785 break; 1786 } 1787 1788 case IEEE80211_FC0_SUBTYPE_DISASSOC: { 1789 uint16_t reason; 1790 1791 if (vap->iv_state != IEEE80211_S_RUN && 1792 vap->iv_state != IEEE80211_S_ASSOC && 1793 vap->iv_state != IEEE80211_S_AUTH) { 1794 vap->iv_stats.is_rx_mgtdiscard++; 1795 return; 1796 } 1797 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 1798 /* NB: can happen when in promiscuous mode */ 1799 vap->iv_stats.is_rx_mgtdiscard++; 1800 break; 1801 } 1802 1803 /* 1804 * disassoc frame format 1805 * [2] reason 1806 */ 1807 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 1808 reason = le16toh(*(uint16_t *)frm); 1809 1810 vap->iv_stats.is_rx_disassoc++; 1811 vap->iv_stats.is_rx_disassoc_code = reason; 1812 IEEE80211_NODE_STAT(ni, rx_disassoc); 1813 1814 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 1815 "recv disassociate (reason: %d (%s))", reason, 1816 ieee80211_reason_to_string(reason)); 1817 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 1818 break; 1819 } 1820 1821 case IEEE80211_FC0_SUBTYPE_ACTION: 1822 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 1823 if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 1824 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1825 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1826 wh, NULL, "%s", "not for us"); 1827 vap->iv_stats.is_rx_mgtdiscard++; 1828 } else if (vap->iv_state != IEEE80211_S_RUN) { 1829 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1830 wh, NULL, "wrong state %s", 1831 ieee80211_state_name[vap->iv_state]); 1832 vap->iv_stats.is_rx_mgtdiscard++; 1833 } else { 1834 if (ieee80211_parse_action(ni, m0) == 0) 1835 (void)ic->ic_recv_action(ni, wh, frm, efrm); 1836 } 1837 break; 1838 1839 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1840 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 1841 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1842 case IEEE80211_FC0_SUBTYPE_TIMING_ADV: 1843 case IEEE80211_FC0_SUBTYPE_ATIM: 1844 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1845 wh, NULL, "%s", "not handled"); 1846 vap->iv_stats.is_rx_mgtdiscard++; 1847 break; 1848 1849 default: 1850 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1851 wh, "mgt", "subtype 0x%x not handled", subtype); 1852 vap->iv_stats.is_rx_badsubtype++; 1853 break; 1854 } 1855#undef ISREASSOC 1856} 1857 1858static void 1859sta_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 1860{ 1861 switch (subtype) { 1862 case IEEE80211_FC0_SUBTYPE_BAR: 1863 ieee80211_recv_bar(ni, m); 1864 break; 1865 } 1866} 1867