ieee80211_sta.c revision 298376
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: head/sys/net80211/ieee80211_sta.c 298376 2016-04-20 21:15:55Z 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 struct ieee80211com *ic = vap->iv_ic; 158 159 /* 160 * If we receive a beacon miss interrupt when using 161 * dynamic turbo, attempt to switch modes before 162 * reassociating. 163 */ 164 if (IEEE80211_ATH_CAP(vap, vap->iv_bss, IEEE80211_NODE_TURBOP)) 165 ieee80211_dturbo_switch(vap, 166 ic->ic_bsschan->ic_flags ^ IEEE80211_CHAN_TURBO); 167#endif 168 /* 169 * Try to reassociate before scanning for a new ap. 170 */ 171 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 172 } else { 173 /* 174 * Somebody else is controlling state changes (e.g. 175 * a user-mode app) don't do anything that would 176 * confuse them; just drop into scan mode so they'll 177 * notified of the state change and given control. 178 */ 179 ieee80211_new_state(vap, IEEE80211_S_SCAN, 0); 180 } 181} 182 183/* 184 * Handle deauth with reason. We retry only for 185 * the cases where we might succeed. Otherwise 186 * we downgrade the ap and scan. 187 */ 188static void 189sta_authretry(struct ieee80211vap *vap, struct ieee80211_node *ni, int reason) 190{ 191 switch (reason) { 192 case IEEE80211_STATUS_SUCCESS: /* NB: MLME assoc */ 193 case IEEE80211_STATUS_TIMEOUT: 194 case IEEE80211_REASON_ASSOC_EXPIRE: 195 case IEEE80211_REASON_NOT_AUTHED: 196 case IEEE80211_REASON_NOT_ASSOCED: 197 case IEEE80211_REASON_ASSOC_LEAVE: 198 case IEEE80211_REASON_ASSOC_NOT_AUTHED: 199 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, 1); 200 break; 201 default: 202 ieee80211_scan_assoc_fail(vap, vap->iv_bss->ni_macaddr, reason); 203 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 204 ieee80211_check_scan_current(vap); 205 break; 206 } 207} 208 209static void 210sta_swbmiss_start(struct ieee80211vap *vap) 211{ 212 213 if (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS) { 214 /* 215 * Start s/w beacon miss timer for devices w/o 216 * hardware support. We fudge a bit here since 217 * we're doing this in software. 218 */ 219 vap->iv_swbmiss_period = IEEE80211_TU_TO_TICKS( 220 2 * vap->iv_bmissthreshold * vap->iv_bss->ni_intval); 221 vap->iv_swbmiss_count = 0; 222 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, 223 ieee80211_swbmiss, vap); 224 } 225} 226 227/* 228 * IEEE80211_M_STA vap state machine handler. 229 * This routine handles the main states in the 802.11 protocol. 230 */ 231static int 232sta_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 233{ 234 struct ieee80211com *ic = vap->iv_ic; 235 struct ieee80211_node *ni; 236 enum ieee80211_state ostate; 237 238 IEEE80211_LOCK_ASSERT(ic); 239 240 ostate = vap->iv_state; 241 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 242 __func__, ieee80211_state_name[ostate], 243 ieee80211_state_name[nstate], arg); 244 vap->iv_state = nstate; /* state transition */ 245 callout_stop(&vap->iv_mgtsend); /* XXX callout_drain */ 246 if (ostate != IEEE80211_S_SCAN) 247 ieee80211_cancel_scan(vap); /* background scan */ 248 ni = vap->iv_bss; /* NB: no reference held */ 249 if (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS) 250 callout_stop(&vap->iv_swbmiss); 251 switch (nstate) { 252 case IEEE80211_S_INIT: 253 switch (ostate) { 254 case IEEE80211_S_SLEEP: 255 /* XXX wakeup */ 256 /* XXX driver hook to wakeup the hardware? */ 257 case IEEE80211_S_RUN: 258 IEEE80211_SEND_MGMT(ni, 259 IEEE80211_FC0_SUBTYPE_DISASSOC, 260 IEEE80211_REASON_ASSOC_LEAVE); 261 ieee80211_sta_leave(ni); 262 break; 263 case IEEE80211_S_ASSOC: 264 IEEE80211_SEND_MGMT(ni, 265 IEEE80211_FC0_SUBTYPE_DEAUTH, 266 IEEE80211_REASON_AUTH_LEAVE); 267 break; 268 case IEEE80211_S_SCAN: 269 ieee80211_cancel_scan(vap); 270 break; 271 default: 272 break; 273 } 274 if (ostate != IEEE80211_S_INIT) { 275 /* NB: optimize INIT -> INIT case */ 276 ieee80211_reset_bss(vap); 277 } 278 if (vap->iv_auth->ia_detach != NULL) 279 vap->iv_auth->ia_detach(vap); 280 break; 281 case IEEE80211_S_SCAN: 282 switch (ostate) { 283 case IEEE80211_S_INIT: 284 /* 285 * Initiate a scan. We can come here as a result 286 * of an IEEE80211_IOC_SCAN_REQ too in which case 287 * the vap will be marked with IEEE80211_FEXT_SCANREQ 288 * and the scan request parameters will be present 289 * in iv_scanreq. Otherwise we do the default. 290 */ 291 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 292 ieee80211_check_scan(vap, 293 vap->iv_scanreq_flags, 294 vap->iv_scanreq_duration, 295 vap->iv_scanreq_mindwell, 296 vap->iv_scanreq_maxdwell, 297 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 298 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 299 } else 300 ieee80211_check_scan_current(vap); 301 break; 302 case IEEE80211_S_SCAN: 303 case IEEE80211_S_AUTH: 304 case IEEE80211_S_ASSOC: 305 /* 306 * These can happen either because of a timeout 307 * on an assoc/auth response or because of a 308 * change in state that requires a reset. For 309 * the former we're called with a non-zero arg 310 * that is the cause for the failure; pass this 311 * to the scan code so it can update state. 312 * Otherwise trigger a new scan unless we're in 313 * manual roaming mode in which case an application 314 * must issue an explicit scan request. 315 */ 316 if (arg != 0) 317 ieee80211_scan_assoc_fail(vap, 318 vap->iv_bss->ni_macaddr, arg); 319 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 320 ieee80211_check_scan_current(vap); 321 break; 322 case IEEE80211_S_SLEEP: /* beacon miss */ 323 /* 324 * XXX if in sleep we need to wakeup the hardware. 325 */ 326 /* FALLTHROUGH */ 327 case IEEE80211_S_RUN: /* beacon miss */ 328 /* 329 * Beacon miss. Notify user space and if not 330 * under control of a user application (roaming 331 * manual) kick off a scan to re-connect. 332 */ 333 334 ieee80211_sta_leave(ni); 335 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 336 ieee80211_check_scan_current(vap); 337 break; 338 default: 339 goto invalid; 340 } 341 break; 342 case IEEE80211_S_AUTH: 343 switch (ostate) { 344 case IEEE80211_S_INIT: 345 case IEEE80211_S_SCAN: 346 IEEE80211_SEND_MGMT(ni, 347 IEEE80211_FC0_SUBTYPE_AUTH, 1); 348 break; 349 case IEEE80211_S_AUTH: 350 case IEEE80211_S_ASSOC: 351 switch (arg & 0xff) { 352 case IEEE80211_FC0_SUBTYPE_AUTH: 353 /* ??? */ 354 IEEE80211_SEND_MGMT(ni, 355 IEEE80211_FC0_SUBTYPE_AUTH, 2); 356 break; 357 case IEEE80211_FC0_SUBTYPE_DEAUTH: 358 sta_authretry(vap, ni, arg>>8); 359 break; 360 } 361 break; 362 case IEEE80211_S_SLEEP: 363 case IEEE80211_S_RUN: 364 switch (arg & 0xff) { 365 case IEEE80211_FC0_SUBTYPE_AUTH: 366 IEEE80211_SEND_MGMT(ni, 367 IEEE80211_FC0_SUBTYPE_AUTH, 2); 368 vap->iv_state = IEEE80211_S_RUN; /* stay RUN */ 369 break; 370 case IEEE80211_FC0_SUBTYPE_DEAUTH: 371 ieee80211_sta_leave(ni); 372 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 373 /* try to reauth */ 374 IEEE80211_SEND_MGMT(ni, 375 IEEE80211_FC0_SUBTYPE_AUTH, 1); 376 } 377 break; 378 } 379 break; 380 default: 381 goto invalid; 382 } 383 break; 384 case IEEE80211_S_ASSOC: 385 switch (ostate) { 386 case IEEE80211_S_AUTH: 387 case IEEE80211_S_ASSOC: 388 IEEE80211_SEND_MGMT(ni, 389 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 390 break; 391 case IEEE80211_S_SLEEP: /* cannot happen */ 392 case IEEE80211_S_RUN: 393 ieee80211_sta_leave(ni); 394 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 395 IEEE80211_SEND_MGMT(ni, arg ? 396 IEEE80211_FC0_SUBTYPE_REASSOC_REQ : 397 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 398 } 399 break; 400 default: 401 goto invalid; 402 } 403 break; 404 case IEEE80211_S_RUN: 405 if (vap->iv_flags & IEEE80211_F_WPA) { 406 /* XXX validate prerequisites */ 407 } 408 switch (ostate) { 409 case IEEE80211_S_RUN: 410 case IEEE80211_S_CSA: 411 break; 412 case IEEE80211_S_AUTH: /* when join is done in fw */ 413 case IEEE80211_S_ASSOC: 414#ifdef IEEE80211_DEBUG 415 if (ieee80211_msg_debug(vap)) { 416 ieee80211_note(vap, "%s with %s ssid ", 417 (vap->iv_opmode == IEEE80211_M_STA ? 418 "associated" : "synchronized"), 419 ether_sprintf(ni->ni_bssid)); 420 ieee80211_print_essid(vap->iv_bss->ni_essid, 421 ni->ni_esslen); 422 /* XXX MCS/HT */ 423 printf(" channel %d start %uMb\n", 424 ieee80211_chan2ieee(ic, ic->ic_curchan), 425 IEEE80211_RATE2MBS(ni->ni_txrate)); 426 } 427#endif 428 ieee80211_scan_assoc_success(vap, ni->ni_macaddr); 429 ieee80211_notify_node_join(ni, 430 arg == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 431 break; 432 case IEEE80211_S_SLEEP: 433 /* Wake up from sleep */ 434 vap->iv_sta_ps(vap, 0); 435 break; 436 default: 437 goto invalid; 438 } 439 ieee80211_sync_curchan(ic); 440 if (ostate != IEEE80211_S_RUN) 441 sta_swbmiss_start(vap); 442 /* 443 * When 802.1x is not in use mark the port authorized 444 * at this point so traffic can flow. 445 */ 446 if (ni->ni_authmode != IEEE80211_AUTH_8021X) 447 ieee80211_node_authorize(ni); 448 /* 449 * Fake association when joining an existing bss. 450 * 451 * Don't do this if we're doing SLEEP->RUN. 452 */ 453 if (ic->ic_newassoc != NULL && ostate != IEEE80211_S_SLEEP) 454 ic->ic_newassoc(vap->iv_bss, (ostate != IEEE80211_S_RUN)); 455 break; 456 case IEEE80211_S_CSA: 457 if (ostate != IEEE80211_S_RUN) 458 goto invalid; 459 break; 460 case IEEE80211_S_SLEEP: 461 sta_swbmiss_start(vap); 462 vap->iv_sta_ps(vap, 1); 463 break; 464 default: 465 invalid: 466 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 467 "%s: unexpected state transition %s -> %s\n", __func__, 468 ieee80211_state_name[ostate], ieee80211_state_name[nstate]); 469 break; 470 } 471 return 0; 472} 473 474/* 475 * Return non-zero if the frame is an echo of a multicast 476 * frame sent by ourself. The dir is known to be DSTODS. 477 */ 478static __inline int 479isdstods_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh) 480{ 481#define QWH4(wh) ((const struct ieee80211_qosframe_addr4 *)wh) 482#define WH4(wh) ((const struct ieee80211_frame_addr4 *)wh) 483 const uint8_t *sa; 484 485 KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode")); 486 487 if (!IEEE80211_IS_MULTICAST(wh->i_addr3)) 488 return 0; 489 sa = IEEE80211_QOS_HAS_SEQ(wh) ? QWH4(wh)->i_addr4 : WH4(wh)->i_addr4; 490 return IEEE80211_ADDR_EQ(sa, vap->iv_myaddr); 491#undef WH4 492#undef QWH4 493} 494 495/* 496 * Return non-zero if the frame is an echo of a multicast 497 * frame sent by ourself. The dir is known to be FROMDS. 498 */ 499static __inline int 500isfromds_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh) 501{ 502 KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode")); 503 504 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) 505 return 0; 506 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 507} 508 509/* 510 * Decide if a received management frame should be 511 * printed when debugging is enabled. This filters some 512 * of the less interesting frames that come frequently 513 * (e.g. beacons). 514 */ 515static __inline int 516doprint(struct ieee80211vap *vap, int subtype) 517{ 518 switch (subtype) { 519 case IEEE80211_FC0_SUBTYPE_BEACON: 520 return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN); 521 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 522 return 0; 523 } 524 return 1; 525} 526 527/* 528 * Process a received frame. The node associated with the sender 529 * should be supplied. If nothing was found in the node table then 530 * the caller is assumed to supply a reference to iv_bss instead. 531 * The RSSI and a timestamp are also supplied. The RSSI data is used 532 * during AP scanning to select a AP to associate with; it can have 533 * any units so long as values have consistent units and higher values 534 * mean ``better signal''. The receive timestamp is currently not used 535 * by the 802.11 layer. 536 */ 537static int 538sta_input(struct ieee80211_node *ni, struct mbuf *m, 539 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 540{ 541 struct ieee80211vap *vap = ni->ni_vap; 542 struct ieee80211com *ic = ni->ni_ic; 543 struct ifnet *ifp = vap->iv_ifp; 544 struct ieee80211_frame *wh; 545 struct ieee80211_key *key; 546 struct ether_header *eh; 547 int hdrspace, need_tap = 1; /* mbuf need to be tapped. */ 548 uint8_t dir, type, subtype, qos; 549 uint8_t *bssid; 550 551 if (m->m_flags & M_AMPDU_MPDU) { 552 /* 553 * Fastpath for A-MPDU reorder q resubmission. Frames 554 * w/ M_AMPDU_MPDU marked have already passed through 555 * here but were received out of order and been held on 556 * the reorder queue. When resubmitted they are marked 557 * with the M_AMPDU_MPDU flag and we can bypass most of 558 * the normal processing. 559 */ 560 wh = mtod(m, struct ieee80211_frame *); 561 type = IEEE80211_FC0_TYPE_DATA; 562 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 563 subtype = IEEE80211_FC0_SUBTYPE_QOS; 564 hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ 565 goto resubmit_ampdu; 566 } 567 568 KASSERT(ni != NULL, ("null node")); 569 ni->ni_inact = ni->ni_inact_reload; 570 571 type = -1; /* undefined */ 572 573 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 574 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 575 ni->ni_macaddr, NULL, 576 "too short (1): len %u", m->m_pkthdr.len); 577 vap->iv_stats.is_rx_tooshort++; 578 goto out; 579 } 580 /* 581 * Bit of a cheat here, we use a pointer for a 3-address 582 * frame format but don't reference fields past outside 583 * ieee80211_frame_min w/o first validating the data is 584 * present. 585 */ 586 wh = mtod(m, struct ieee80211_frame *); 587 588 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 589 IEEE80211_FC0_VERSION_0) { 590 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 591 ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x", 592 wh->i_fc[0], wh->i_fc[1]); 593 vap->iv_stats.is_rx_badversion++; 594 goto err; 595 } 596 597 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 598 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 599 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 600 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 601 bssid = wh->i_addr2; 602 if (!IEEE80211_ADDR_EQ(bssid, ni->ni_bssid)) { 603 /* not interested in */ 604 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 605 bssid, NULL, "%s", "not to bss"); 606 vap->iv_stats.is_rx_wrongbss++; 607 goto out; 608 } 609 610 /* 611 * Some devices may be in a promiscuous mode 612 * where they receive frames for multiple station 613 * addresses. 614 * 615 * If we receive a data frame that isn't 616 * destined to our VAP MAC, drop it. 617 * 618 * XXX TODO: This is only enforced when not scanning; 619 * XXX it assumes a software-driven scan will put the NIC 620 * XXX into a "no data frames" mode before setting this 621 * XXX flag. Otherwise it may be possible that we'll still 622 * XXX process data frames whilst scanning. 623 */ 624 if ((! IEEE80211_IS_MULTICAST(wh->i_addr1)) 625 && (! IEEE80211_ADDR_EQ(wh->i_addr1, IF_LLADDR(ifp)))) { 626 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 627 bssid, NULL, "not to cur sta: lladdr=%6D, addr1=%6D", 628 IF_LLADDR(ifp), ":", wh->i_addr1, ":"); 629 vap->iv_stats.is_rx_wrongbss++; 630 goto out; 631 } 632 633 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 634 ni->ni_noise = nf; 635 if ( IEEE80211_HAS_SEQ(type, subtype) && 636 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 637 uint8_t tid = ieee80211_gettid(wh); 638 if (IEEE80211_QOS_HAS_SEQ(wh) && 639 TID_TO_WME_AC(tid) >= WME_AC_VI) 640 ic->ic_wme.wme_hipri_traffic++; 641 if (! ieee80211_check_rxseq(ni, wh, bssid)) 642 goto out; 643 } 644 } 645 646 switch (type) { 647 case IEEE80211_FC0_TYPE_DATA: 648 hdrspace = ieee80211_hdrspace(ic, wh); 649 if (m->m_len < hdrspace && 650 (m = m_pullup(m, hdrspace)) == NULL) { 651 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 652 ni->ni_macaddr, NULL, 653 "data too short: expecting %u", hdrspace); 654 vap->iv_stats.is_rx_tooshort++; 655 goto out; /* XXX */ 656 } 657 /* 658 * Handle A-MPDU re-ordering. If the frame is to be 659 * processed directly then ieee80211_ampdu_reorder 660 * will return 0; otherwise it has consumed the mbuf 661 * and we should do nothing more with it. 662 */ 663 if ((m->m_flags & M_AMPDU) && 664 (dir == IEEE80211_FC1_DIR_FROMDS || 665 dir == IEEE80211_FC1_DIR_DSTODS) && 666 ieee80211_ampdu_reorder(ni, m) != 0) { 667 m = NULL; 668 goto out; 669 } 670 resubmit_ampdu: 671 if (dir == IEEE80211_FC1_DIR_FROMDS) { 672 if ((ifp->if_flags & IFF_SIMPLEX) && 673 isfromds_mcastecho(vap, wh)) { 674 /* 675 * In IEEE802.11 network, multicast 676 * packets sent from "me" are broadcast 677 * from the AP; silently discard for 678 * SIMPLEX interface. 679 */ 680 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 681 wh, "data", "%s", "multicast echo"); 682 vap->iv_stats.is_rx_mcastecho++; 683 goto out; 684 } 685 if ((vap->iv_flags & IEEE80211_F_DWDS) && 686 IEEE80211_IS_MULTICAST(wh->i_addr1)) { 687 /* 688 * DWDS sta's must drop 3-address mcast frames 689 * as they will be sent separately as a 4-addr 690 * frame. Accepting the 3-addr frame will 691 * confuse the bridge into thinking the sending 692 * sta is located at the end of WDS link. 693 */ 694 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 695 "3-address data", "%s", "DWDS enabled"); 696 vap->iv_stats.is_rx_mcastecho++; 697 goto out; 698 } 699 } else if (dir == IEEE80211_FC1_DIR_DSTODS) { 700 if ((vap->iv_flags & IEEE80211_F_DWDS) == 0) { 701 IEEE80211_DISCARD(vap, 702 IEEE80211_MSG_INPUT, wh, "4-address data", 703 "%s", "DWDS not enabled"); 704 vap->iv_stats.is_rx_wrongdir++; 705 goto out; 706 } 707 if ((ifp->if_flags & IFF_SIMPLEX) && 708 isdstods_mcastecho(vap, wh)) { 709 /* 710 * In IEEE802.11 network, multicast 711 * packets sent from "me" are broadcast 712 * from the AP; silently discard for 713 * SIMPLEX interface. 714 */ 715 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 716 "4-address data", "%s", "multicast echo"); 717 vap->iv_stats.is_rx_mcastecho++; 718 goto out; 719 } 720 } else { 721 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 722 "data", "incorrect dir 0x%x", dir); 723 vap->iv_stats.is_rx_wrongdir++; 724 goto out; 725 } 726 727 /* 728 * Handle privacy requirements. Note that we 729 * must not be preempted from here until after 730 * we (potentially) call ieee80211_crypto_demic; 731 * otherwise we may violate assumptions in the 732 * crypto cipher modules used to do delayed update 733 * of replay sequence numbers. 734 */ 735 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 736 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 737 /* 738 * Discard encrypted frames when privacy is off. 739 */ 740 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 741 wh, "WEP", "%s", "PRIVACY off"); 742 vap->iv_stats.is_rx_noprivacy++; 743 IEEE80211_NODE_STAT(ni, rx_noprivacy); 744 goto out; 745 } 746 key = ieee80211_crypto_decap(ni, m, hdrspace); 747 if (key == NULL) { 748 /* NB: stats+msgs handled in crypto_decap */ 749 IEEE80211_NODE_STAT(ni, rx_wepfail); 750 goto out; 751 } 752 wh = mtod(m, struct ieee80211_frame *); 753 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 754 } else { 755 /* XXX M_WEP and IEEE80211_F_PRIVACY */ 756 key = NULL; 757 } 758 759 /* 760 * Save QoS bits for use below--before we strip the header. 761 */ 762 if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { 763 qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? 764 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : 765 ((struct ieee80211_qosframe *)wh)->i_qos[0]; 766 } else 767 qos = 0; 768 769 /* 770 * Next up, any fragmentation. 771 */ 772 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 773 m = ieee80211_defrag(ni, m, hdrspace); 774 if (m == NULL) { 775 /* Fragment dropped or frame not complete yet */ 776 goto out; 777 } 778 } 779 wh = NULL; /* no longer valid, catch any uses */ 780 781 /* 782 * Next strip any MSDU crypto bits. 783 */ 784 if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) { 785 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 786 ni->ni_macaddr, "data", "%s", "demic error"); 787 vap->iv_stats.is_rx_demicfail++; 788 IEEE80211_NODE_STAT(ni, rx_demicfail); 789 goto out; 790 } 791 792 /* copy to listener after decrypt */ 793 if (ieee80211_radiotap_active_vap(vap)) 794 ieee80211_radiotap_rx(vap, m); 795 need_tap = 0; 796 797 /* 798 * Finally, strip the 802.11 header. 799 */ 800 m = ieee80211_decap(vap, m, hdrspace); 801 if (m == NULL) { 802 /* XXX mask bit to check for both */ 803 /* don't count Null data frames as errors */ 804 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 805 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 806 goto out; 807 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 808 ni->ni_macaddr, "data", "%s", "decap error"); 809 vap->iv_stats.is_rx_decap++; 810 IEEE80211_NODE_STAT(ni, rx_decap); 811 goto err; 812 } 813 eh = mtod(m, struct ether_header *); 814 if (!ieee80211_node_is_authorized(ni)) { 815 /* 816 * Deny any non-PAE frames received prior to 817 * authorization. For open/shared-key 818 * authentication the port is mark authorized 819 * after authentication completes. For 802.1x 820 * the port is not marked authorized by the 821 * authenticator until the handshake has completed. 822 */ 823 if (eh->ether_type != htons(ETHERTYPE_PAE)) { 824 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 825 eh->ether_shost, "data", 826 "unauthorized port: ether type 0x%x len %u", 827 eh->ether_type, m->m_pkthdr.len); 828 vap->iv_stats.is_rx_unauth++; 829 IEEE80211_NODE_STAT(ni, rx_unauth); 830 goto err; 831 } 832 } else { 833 /* 834 * When denying unencrypted frames, discard 835 * any non-PAE frames received without encryption. 836 */ 837 if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && 838 (key == NULL && (m->m_flags & M_WEP) == 0) && 839 eh->ether_type != htons(ETHERTYPE_PAE)) { 840 /* 841 * Drop unencrypted frames. 842 */ 843 vap->iv_stats.is_rx_unencrypted++; 844 IEEE80211_NODE_STAT(ni, rx_unencrypted); 845 goto out; 846 } 847 } 848 /* XXX require HT? */ 849 if (qos & IEEE80211_QOS_AMSDU) { 850 m = ieee80211_decap_amsdu(ni, m); 851 if (m == NULL) 852 return IEEE80211_FC0_TYPE_DATA; 853 } else { 854#ifdef IEEE80211_SUPPORT_SUPERG 855 m = ieee80211_decap_fastframe(vap, ni, m); 856 if (m == NULL) 857 return IEEE80211_FC0_TYPE_DATA; 858#endif 859 } 860 ieee80211_deliver_data(vap, ni, m); 861 return IEEE80211_FC0_TYPE_DATA; 862 863 case IEEE80211_FC0_TYPE_MGT: 864 vap->iv_stats.is_rx_mgmt++; 865 IEEE80211_NODE_STAT(ni, rx_mgmt); 866 if (dir != IEEE80211_FC1_DIR_NODS) { 867 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 868 wh, "data", "incorrect dir 0x%x", dir); 869 vap->iv_stats.is_rx_wrongdir++; 870 goto err; 871 } 872 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 873 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 874 ni->ni_macaddr, "mgt", "too short: len %u", 875 m->m_pkthdr.len); 876 vap->iv_stats.is_rx_tooshort++; 877 goto out; 878 } 879#ifdef IEEE80211_DEBUG 880 if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) || 881 ieee80211_msg_dumppkts(vap)) { 882 if_printf(ifp, "received %s from %s rssi %d\n", 883 ieee80211_mgt_subtype_name(subtype), 884 ether_sprintf(wh->i_addr2), rssi); 885 } 886#endif 887 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 888 if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) { 889 /* 890 * Only shared key auth frames with a challenge 891 * should be encrypted, discard all others. 892 */ 893 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 894 wh, ieee80211_mgt_subtype_name(subtype), 895 "%s", "WEP set but not permitted"); 896 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 897 goto out; 898 } 899 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 900 /* 901 * Discard encrypted frames when privacy is off. 902 */ 903 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 904 wh, "mgt", "%s", "WEP set but PRIVACY off"); 905 vap->iv_stats.is_rx_noprivacy++; 906 goto out; 907 } 908 hdrspace = ieee80211_hdrspace(ic, wh); 909 key = ieee80211_crypto_decap(ni, m, hdrspace); 910 if (key == NULL) { 911 /* NB: stats+msgs handled in crypto_decap */ 912 goto out; 913 } 914 wh = mtod(m, struct ieee80211_frame *); 915 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 916 } 917 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); 918 goto out; 919 920 case IEEE80211_FC0_TYPE_CTL: 921 vap->iv_stats.is_rx_ctl++; 922 IEEE80211_NODE_STAT(ni, rx_ctrl); 923 vap->iv_recv_ctl(ni, m, subtype); 924 goto out; 925 926 default: 927 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 928 wh, NULL, "bad frame type 0x%x", type); 929 /* should not come here */ 930 break; 931 } 932err: 933 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 934out: 935 if (m != NULL) { 936 if (need_tap && ieee80211_radiotap_active_vap(vap)) 937 ieee80211_radiotap_rx(vap, m); 938 m_freem(m); 939 } 940 return type; 941} 942 943static void 944sta_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh, 945 int rssi, int nf, uint16_t seq, uint16_t status) 946{ 947 struct ieee80211vap *vap = ni->ni_vap; 948 949 if (ni->ni_authmode == IEEE80211_AUTH_SHARED) { 950 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 951 ni->ni_macaddr, "open auth", 952 "bad sta auth mode %u", ni->ni_authmode); 953 vap->iv_stats.is_rx_bad_auth++; /* XXX */ 954 return; 955 } 956 if (vap->iv_state != IEEE80211_S_AUTH || 957 seq != IEEE80211_AUTH_OPEN_RESPONSE) { 958 vap->iv_stats.is_rx_bad_auth++; 959 return; 960 } 961 if (status != 0) { 962 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 963 ni, "open auth failed (reason %d)", status); 964 vap->iv_stats.is_rx_auth_fail++; 965 vap->iv_stats.is_rx_authfail_code = status; 966 ieee80211_new_state(vap, IEEE80211_S_SCAN, 967 IEEE80211_SCAN_FAIL_STATUS); 968 } else 969 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 970} 971 972static void 973sta_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh, 974 uint8_t *frm, uint8_t *efrm, int rssi, int nf, 975 uint16_t seq, uint16_t status) 976{ 977 struct ieee80211vap *vap = ni->ni_vap; 978 uint8_t *challenge; 979 int estatus; 980 981 /* 982 * NB: this can happen as we allow pre-shared key 983 * authentication to be enabled w/o wep being turned 984 * on so that configuration of these can be done 985 * in any order. It may be better to enforce the 986 * ordering in which case this check would just be 987 * for sanity/consistency. 988 */ 989 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 990 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 991 ni->ni_macaddr, "shared key auth", 992 "%s", " PRIVACY is disabled"); 993 estatus = IEEE80211_STATUS_ALG; 994 goto bad; 995 } 996 /* 997 * Pre-shared key authentication is evil; accept 998 * it only if explicitly configured (it is supported 999 * mainly for compatibility with clients like OS X). 1000 */ 1001 if (ni->ni_authmode != IEEE80211_AUTH_AUTO && 1002 ni->ni_authmode != IEEE80211_AUTH_SHARED) { 1003 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1004 ni->ni_macaddr, "shared key auth", 1005 "bad sta auth mode %u", ni->ni_authmode); 1006 vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */ 1007 estatus = IEEE80211_STATUS_ALG; 1008 goto bad; 1009 } 1010 1011 challenge = NULL; 1012 if (frm + 1 < efrm) { 1013 if ((frm[1] + 2) > (efrm - frm)) { 1014 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1015 ni->ni_macaddr, "shared key auth", 1016 "ie %d/%d too long", 1017 frm[0], (frm[1] + 2) - (efrm - frm)); 1018 vap->iv_stats.is_rx_bad_auth++; 1019 estatus = IEEE80211_STATUS_CHALLENGE; 1020 goto bad; 1021 } 1022 if (*frm == IEEE80211_ELEMID_CHALLENGE) 1023 challenge = frm; 1024 frm += frm[1] + 2; 1025 } 1026 switch (seq) { 1027 case IEEE80211_AUTH_SHARED_CHALLENGE: 1028 case IEEE80211_AUTH_SHARED_RESPONSE: 1029 if (challenge == NULL) { 1030 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1031 ni->ni_macaddr, "shared key auth", 1032 "%s", "no challenge"); 1033 vap->iv_stats.is_rx_bad_auth++; 1034 estatus = IEEE80211_STATUS_CHALLENGE; 1035 goto bad; 1036 } 1037 if (challenge[1] != IEEE80211_CHALLENGE_LEN) { 1038 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1039 ni->ni_macaddr, "shared key auth", 1040 "bad challenge len %d", challenge[1]); 1041 vap->iv_stats.is_rx_bad_auth++; 1042 estatus = IEEE80211_STATUS_CHALLENGE; 1043 goto bad; 1044 } 1045 default: 1046 break; 1047 } 1048 if (vap->iv_state != IEEE80211_S_AUTH) 1049 return; 1050 switch (seq) { 1051 case IEEE80211_AUTH_SHARED_PASS: 1052 if (ni->ni_challenge != NULL) { 1053 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 1054 ni->ni_challenge = NULL; 1055 } 1056 if (status != 0) { 1057 IEEE80211_NOTE_FRAME(vap, 1058 IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, wh, 1059 "shared key auth failed (reason %d)", status); 1060 vap->iv_stats.is_rx_auth_fail++; 1061 vap->iv_stats.is_rx_authfail_code = status; 1062 return; 1063 } 1064 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 1065 break; 1066 case IEEE80211_AUTH_SHARED_CHALLENGE: 1067 if (!ieee80211_alloc_challenge(ni)) 1068 return; 1069 /* XXX could optimize by passing recvd challenge */ 1070 memcpy(ni->ni_challenge, &challenge[2], challenge[1]); 1071 IEEE80211_SEND_MGMT(ni, 1072 IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 1073 break; 1074 default: 1075 IEEE80211_DISCARD(vap, IEEE80211_MSG_AUTH, 1076 wh, "shared key auth", "bad seq %d", seq); 1077 vap->iv_stats.is_rx_bad_auth++; 1078 return; 1079 } 1080 return; 1081bad: 1082 /* 1083 * Kick the state machine. This short-circuits 1084 * using the mgt frame timeout to trigger the 1085 * state transition. 1086 */ 1087 if (vap->iv_state == IEEE80211_S_AUTH) 1088 ieee80211_new_state(vap, IEEE80211_S_SCAN, 1089 IEEE80211_SCAN_FAIL_STATUS); 1090} 1091 1092int 1093ieee80211_parse_wmeparams(struct ieee80211vap *vap, uint8_t *frm, 1094 const struct ieee80211_frame *wh) 1095{ 1096#define MS(_v, _f) (((_v) & _f) >> _f##_S) 1097 struct ieee80211_wme_state *wme = &vap->iv_ic->ic_wme; 1098 u_int len = frm[1], qosinfo; 1099 int i; 1100 1101 if (len < sizeof(struct ieee80211_wme_param)-2) { 1102 IEEE80211_DISCARD_IE(vap, 1103 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WME, 1104 wh, "WME", "too short, len %u", len); 1105 return -1; 1106 } 1107 qosinfo = frm[__offsetof(struct ieee80211_wme_param, param_qosInfo)]; 1108 qosinfo &= WME_QOSINFO_COUNT; 1109 /* XXX do proper check for wraparound */ 1110 if (qosinfo == wme->wme_wmeChanParams.cap_info) 1111 return 0; 1112 frm += __offsetof(struct ieee80211_wme_param, params_acParams); 1113 for (i = 0; i < WME_NUM_AC; i++) { 1114 struct wmeParams *wmep = 1115 &wme->wme_wmeChanParams.cap_wmeParams[i]; 1116 /* NB: ACI not used */ 1117 wmep->wmep_acm = MS(frm[0], WME_PARAM_ACM); 1118 wmep->wmep_aifsn = MS(frm[0], WME_PARAM_AIFSN); 1119 wmep->wmep_logcwmin = MS(frm[1], WME_PARAM_LOGCWMIN); 1120 wmep->wmep_logcwmax = MS(frm[1], WME_PARAM_LOGCWMAX); 1121 wmep->wmep_txopLimit = le16dec(frm+2); 1122 frm += 4; 1123 } 1124 wme->wme_wmeChanParams.cap_info = qosinfo; 1125 return 1; 1126#undef MS 1127} 1128 1129/* 1130 * Process 11h Channel Switch Announcement (CSA) ie. If this 1131 * is the first CSA then initiate the switch. Otherwise we 1132 * track state and trigger completion and/or cancel of the switch. 1133 * XXX should be public for IBSS use 1134 */ 1135static void 1136ieee80211_parse_csaparams(struct ieee80211vap *vap, uint8_t *frm, 1137 const struct ieee80211_frame *wh) 1138{ 1139 struct ieee80211com *ic = vap->iv_ic; 1140 const struct ieee80211_csa_ie *csa = 1141 (const struct ieee80211_csa_ie *) frm; 1142 1143 KASSERT(vap->iv_state >= IEEE80211_S_RUN, 1144 ("state %s", ieee80211_state_name[vap->iv_state])); 1145 1146 if (csa->csa_mode > 1) { 1147 IEEE80211_DISCARD_IE(vap, 1148 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1149 wh, "CSA", "invalid mode %u", csa->csa_mode); 1150 return; 1151 } 1152 IEEE80211_LOCK(ic); 1153 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 1154 /* 1155 * Convert the channel number to a channel reference. We 1156 * try first to preserve turbo attribute of the current 1157 * channel then fallback. Note this will not work if the 1158 * CSA specifies a channel that requires a band switch (e.g. 1159 * 11a => 11g). This is intentional as 11h is defined only 1160 * for 5GHz/11a and because the switch does not involve a 1161 * reassociation, protocol state (capabilities, negotated 1162 * rates, etc) may/will be wrong. 1163 */ 1164 struct ieee80211_channel *c = 1165 ieee80211_find_channel_byieee(ic, csa->csa_newchan, 1166 (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALLTURBO)); 1167 if (c == NULL) { 1168 c = ieee80211_find_channel_byieee(ic, 1169 csa->csa_newchan, 1170 (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALL)); 1171 if (c == NULL) { 1172 IEEE80211_DISCARD_IE(vap, 1173 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1174 wh, "CSA", "invalid channel %u", 1175 csa->csa_newchan); 1176 goto done; 1177 } 1178 } 1179#if IEEE80211_CSA_COUNT_MIN > 0 1180 if (csa->csa_count < IEEE80211_CSA_COUNT_MIN) { 1181 /* 1182 * Require at least IEEE80211_CSA_COUNT_MIN count to 1183 * reduce the risk of being redirected by a fabricated 1184 * CSA. If a valid CSA is dropped we'll still get a 1185 * beacon miss when the AP leaves the channel so we'll 1186 * eventually follow to the new channel. 1187 * 1188 * NOTE: this violates the 11h spec that states that 1189 * count may be any value and if 0 then a switch 1190 * should happen asap. 1191 */ 1192 IEEE80211_DISCARD_IE(vap, 1193 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1194 wh, "CSA", "count %u too small, must be >= %u", 1195 csa->csa_count, IEEE80211_CSA_COUNT_MIN); 1196 goto done; 1197 } 1198#endif 1199 ieee80211_csa_startswitch(ic, c, csa->csa_mode, csa->csa_count); 1200 } else { 1201 /* 1202 * Validate this ie against the initial CSA. We require 1203 * mode and channel not change and the count must be 1204 * monotonically decreasing. This may be pointless and 1205 * canceling the switch as a result may be too paranoid but 1206 * in the worst case if we drop out of CSA because of this 1207 * and the AP does move then we'll just end up taking a 1208 * beacon miss and scan to find the AP. 1209 * 1210 * XXX may want <= on count as we also process ProbeResp 1211 * frames and those may come in w/ the same count as the 1212 * previous beacon; but doing so leaves us open to a stuck 1213 * count until we add a dead-man timer 1214 */ 1215 if (!(csa->csa_count < ic->ic_csa_count && 1216 csa->csa_mode == ic->ic_csa_mode && 1217 csa->csa_newchan == ieee80211_chan2ieee(ic, ic->ic_csa_newchan))) { 1218 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_DOTH, wh, 1219 "CSA ie mismatch, initial ie <%d,%d,%d>, " 1220 "this ie <%d,%d,%d>", ic->ic_csa_mode, 1221 ic->ic_csa_newchan, ic->ic_csa_count, 1222 csa->csa_mode, csa->csa_newchan, csa->csa_count); 1223 ieee80211_csa_cancelswitch(ic); 1224 } else { 1225 if (csa->csa_count <= 1) 1226 ieee80211_csa_completeswitch(ic); 1227 else 1228 ic->ic_csa_count = csa->csa_count; 1229 } 1230 } 1231done: 1232 IEEE80211_UNLOCK(ic); 1233} 1234 1235/* 1236 * Return non-zero if a background scan may be continued: 1237 * o bg scan is active 1238 * o no channel switch is pending 1239 * o there has not been any traffic recently 1240 * 1241 * Note we do not check if there is an administrative enable; 1242 * this is only done to start the scan. We assume that any 1243 * change in state will be accompanied by a request to cancel 1244 * active scans which will otherwise cause this test to fail. 1245 */ 1246static __inline int 1247contbgscan(struct ieee80211vap *vap) 1248{ 1249 struct ieee80211com *ic = vap->iv_ic; 1250 1251 return ((ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN) && 1252 (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && 1253 vap->iv_state == IEEE80211_S_RUN && /* XXX? */ 1254 ieee80211_time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)); 1255} 1256 1257/* 1258 * Return non-zero if a backgrond scan may be started: 1259 * o bg scanning is administratively enabled 1260 * o no channel switch is pending 1261 * o we are not boosted on a dynamic turbo channel 1262 * o there has not been a scan recently 1263 * o there has not been any traffic recently 1264 */ 1265static __inline int 1266startbgscan(struct ieee80211vap *vap) 1267{ 1268 struct ieee80211com *ic = vap->iv_ic; 1269 1270 return ((vap->iv_flags & IEEE80211_F_BGSCAN) && 1271 (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && 1272#ifdef IEEE80211_SUPPORT_SUPERG 1273 !IEEE80211_IS_CHAN_DTURBO(ic->ic_curchan) && 1274#endif 1275 ieee80211_time_after(ticks, ic->ic_lastscan + vap->iv_bgscanintvl) && 1276 ieee80211_time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)); 1277} 1278 1279static void 1280sta_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1281 const struct ieee80211_rx_stats *rxs, 1282 int rssi, int nf) 1283{ 1284#define ISPROBE(_st) ((_st) == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1285#define ISREASSOC(_st) ((_st) == IEEE80211_FC0_SUBTYPE_REASSOC_RESP) 1286 struct ieee80211vap *vap = ni->ni_vap; 1287 struct ieee80211com *ic = ni->ni_ic; 1288 struct ieee80211_channel *rxchan = ic->ic_curchan; 1289 struct ieee80211_frame *wh; 1290 uint8_t *frm, *efrm; 1291 uint8_t *rates, *xrates, *wme, *htcap, *htinfo; 1292 uint8_t rate; 1293 int ht_state_change = 0; 1294 1295 wh = mtod(m0, struct ieee80211_frame *); 1296 frm = (uint8_t *)&wh[1]; 1297 efrm = mtod(m0, uint8_t *) + m0->m_len; 1298 switch (subtype) { 1299 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1300 case IEEE80211_FC0_SUBTYPE_BEACON: { 1301 struct ieee80211_scanparams scan; 1302 struct ieee80211_channel *c; 1303 /* 1304 * We process beacon/probe response frames: 1305 * o when scanning, or 1306 * o station mode when associated (to collect state 1307 * updates such as 802.11g slot time) 1308 * Frames otherwise received are discarded. 1309 */ 1310 if (!((ic->ic_flags & IEEE80211_F_SCAN) || ni->ni_associd)) { 1311 vap->iv_stats.is_rx_mgtdiscard++; 1312 return; 1313 } 1314 1315 /* Override RX channel as appropriate */ 1316 if (rxs != NULL) { 1317 c = ieee80211_lookup_channel_rxstatus(vap, rxs); 1318 if (c != NULL) 1319 rxchan = c; 1320 } 1321 1322 /* XXX probe response in sta mode when !scanning? */ 1323 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0) { 1324 if (! (ic->ic_flags & IEEE80211_F_SCAN)) 1325 vap->iv_stats.is_beacon_bad++; 1326 return; 1327 } 1328 1329 /* 1330 * Count frame now that we know it's to be processed. 1331 */ 1332 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1333 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1334 IEEE80211_NODE_STAT(ni, rx_beacons); 1335 } else 1336 IEEE80211_NODE_STAT(ni, rx_proberesp); 1337 /* 1338 * When operating in station mode, check for state updates. 1339 * Be careful to ignore beacons received while doing a 1340 * background scan. We consider only 11g/WMM stuff right now. 1341 */ 1342 if (ni->ni_associd != 0 && 1343 ((ic->ic_flags & IEEE80211_F_SCAN) == 0 || 1344 IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_bssid))) { 1345 /* record tsf of last beacon */ 1346 memcpy(ni->ni_tstamp.data, scan.tstamp, 1347 sizeof(ni->ni_tstamp)); 1348 /* count beacon frame for s/w bmiss handling */ 1349 vap->iv_swbmiss_count++; 1350 vap->iv_bmiss_count = 0; 1351 if (ni->ni_erp != scan.erp) { 1352 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1353 wh->i_addr2, 1354 "erp change: was 0x%x, now 0x%x", 1355 ni->ni_erp, scan.erp); 1356 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1357 (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) 1358 ic->ic_flags |= IEEE80211_F_USEPROT; 1359 else 1360 ic->ic_flags &= ~IEEE80211_F_USEPROT; 1361 ni->ni_erp = scan.erp; 1362 /* XXX statistic */ 1363 /* XXX driver notification */ 1364 } 1365 if ((ni->ni_capinfo ^ scan.capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME) { 1366 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1367 wh->i_addr2, 1368 "capabilities change: was 0x%x, now 0x%x", 1369 ni->ni_capinfo, scan.capinfo); 1370 /* 1371 * NB: we assume short preamble doesn't 1372 * change dynamically 1373 */ 1374 ieee80211_set_shortslottime(ic, 1375 IEEE80211_IS_CHAN_A(ic->ic_bsschan) || 1376 (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1377 ni->ni_capinfo = (ni->ni_capinfo &~ IEEE80211_CAPINFO_SHORT_SLOTTIME) 1378 | (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME); 1379 /* XXX statistic */ 1380 } 1381 if (scan.wme != NULL && 1382 (ni->ni_flags & IEEE80211_NODE_QOS) && 1383 ieee80211_parse_wmeparams(vap, scan.wme, wh) > 0) 1384 ieee80211_wme_updateparams(vap); 1385#ifdef IEEE80211_SUPPORT_SUPERG 1386 if (scan.ath != NULL) 1387 ieee80211_parse_athparams(ni, scan.ath, wh); 1388#endif 1389 if (scan.htcap != NULL && scan.htinfo != NULL && 1390 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1391 /* XXX state changes? */ 1392 if (ieee80211_ht_updateparams(ni, 1393 scan.htcap, scan.htinfo)) 1394 ht_state_change = 1; 1395 } 1396 if (scan.quiet) 1397 ic->ic_set_quiet(ni, scan.quiet); 1398 1399 if (scan.tim != NULL) { 1400 struct ieee80211_tim_ie *tim = 1401 (struct ieee80211_tim_ie *) scan.tim; 1402 /* 1403 * XXX Check/debug this code; see if it's about 1404 * the right time to force the VAP awake if we 1405 * receive a frame destined for us? 1406 */ 1407 int aid = IEEE80211_AID(ni->ni_associd); 1408 int ix = aid / NBBY; 1409 int min = tim->tim_bitctl &~ 1; 1410 int max = tim->tim_len + min - 4; 1411 int tim_ucast = 0, tim_mcast = 0; 1412 1413 /* 1414 * Only do this for unicast traffic in the TIM 1415 * The multicast traffic notification for 1416 * the scan notification stuff should occur 1417 * differently. 1418 */ 1419 if (min <= ix && ix <= max && 1420 isset(tim->tim_bitmap - min, aid)) { 1421 tim_ucast = 1; 1422 } 1423 1424 /* 1425 * Do a separate notification 1426 * for the multicast bit being set. 1427 */ 1428 if (tim->tim_bitctl & 1) { 1429 tim_mcast = 1; 1430 } 1431 1432 /* 1433 * If the TIM indicates there's traffic for 1434 * us then get us out of STA mode powersave. 1435 */ 1436 if (tim_ucast == 1) { 1437 1438 /* 1439 * Wake us out of SLEEP state if we're 1440 * in it; and if we're doing bgscan 1441 * then wake us out of STA powersave. 1442 */ 1443 ieee80211_sta_tim_notify(vap, 1); 1444 1445 /* 1446 * This is preventing us from 1447 * continuing a bgscan; because it 1448 * tricks the contbgscan() 1449 * routine to think there's always 1450 * traffic for us. 1451 * 1452 * I think we need both an RX and 1453 * TX ic_lastdata field. 1454 */ 1455 ic->ic_lastdata = ticks; 1456 } 1457 1458 ni->ni_dtim_count = tim->tim_count; 1459 ni->ni_dtim_period = tim->tim_period; 1460 } 1461 if (scan.csa != NULL && 1462 (vap->iv_flags & IEEE80211_F_DOTH)) 1463 ieee80211_parse_csaparams(vap, scan.csa, wh); 1464 else if (ic->ic_flags & IEEE80211_F_CSAPENDING) { 1465 /* 1466 * No CSA ie or 11h disabled, but a channel 1467 * switch is pending; drop out so we aren't 1468 * stuck in CSA state. If the AP really is 1469 * moving we'll get a beacon miss and scan. 1470 */ 1471 IEEE80211_LOCK(ic); 1472 ieee80211_csa_cancelswitch(ic); 1473 IEEE80211_UNLOCK(ic); 1474 } 1475 /* 1476 * If scanning, pass the info to the scan module. 1477 * Otherwise, check if it's the right time to do 1478 * a background scan. Background scanning must 1479 * be enabled and we must not be operating in the 1480 * turbo phase of dynamic turbo mode. Then, 1481 * it's been a while since the last background 1482 * scan and if no data frames have come through 1483 * recently, kick off a scan. Note that this 1484 * is the mechanism by which a background scan 1485 * is started _and_ continued each time we 1486 * return on-channel to receive a beacon from 1487 * our ap. 1488 */ 1489 if (ic->ic_flags & IEEE80211_F_SCAN) { 1490 ieee80211_add_scan(vap, rxchan, 1491 &scan, wh, subtype, rssi, nf); 1492 } else if (contbgscan(vap)) { 1493 ieee80211_bg_scan(vap, 0); 1494 } else if (startbgscan(vap)) { 1495 vap->iv_stats.is_scan_bg++; 1496#if 0 1497 /* wakeup if we are sleeing */ 1498 ieee80211_set_pwrsave(vap, 0); 1499#endif 1500 ieee80211_bg_scan(vap, 0); 1501 } 1502 1503 /* 1504 * Put the station to sleep if we haven't seen 1505 * traffic in a while. 1506 */ 1507 IEEE80211_LOCK(ic); 1508 ieee80211_sta_ps_timer_check(vap); 1509 IEEE80211_UNLOCK(ic); 1510 1511 /* 1512 * If we've had a channel width change (eg HT20<->HT40) 1513 * then schedule a delayed driver notification. 1514 */ 1515 if (ht_state_change) 1516 ieee80211_update_chw(ic); 1517 return; 1518 } 1519 /* 1520 * If scanning, just pass information to the scan module. 1521 */ 1522 if (ic->ic_flags & IEEE80211_F_SCAN) { 1523 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1524 /* 1525 * Actively scanning a channel marked passive; 1526 * send a probe request now that we know there 1527 * is 802.11 traffic present. 1528 * 1529 * XXX check if the beacon we recv'd gives 1530 * us what we need and suppress the probe req 1531 */ 1532 ieee80211_probe_curchan(vap, 1); 1533 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1534 } 1535 ieee80211_add_scan(vap, rxchan, &scan, wh, 1536 subtype, rssi, nf); 1537 return; 1538 } 1539 break; 1540 } 1541 1542 case IEEE80211_FC0_SUBTYPE_AUTH: { 1543 uint16_t algo, seq, status; 1544 /* 1545 * auth frame format 1546 * [2] algorithm 1547 * [2] sequence 1548 * [2] status 1549 * [tlv*] challenge 1550 */ 1551 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1552 algo = le16toh(*(uint16_t *)frm); 1553 seq = le16toh(*(uint16_t *)(frm + 2)); 1554 status = le16toh(*(uint16_t *)(frm + 4)); 1555 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2, 1556 "recv auth frame with algorithm %d seq %d", algo, seq); 1557 1558 if (vap->iv_flags & IEEE80211_F_COUNTERM) { 1559 IEEE80211_DISCARD(vap, 1560 IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO, 1561 wh, "auth", "%s", "TKIP countermeasures enabled"); 1562 vap->iv_stats.is_rx_auth_countermeasures++; 1563 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 1564 ieee80211_send_error(ni, wh->i_addr2, 1565 IEEE80211_FC0_SUBTYPE_AUTH, 1566 IEEE80211_REASON_MIC_FAILURE); 1567 } 1568 return; 1569 } 1570 if (algo == IEEE80211_AUTH_ALG_SHARED) 1571 sta_auth_shared(ni, wh, frm + 6, efrm, rssi, nf, 1572 seq, status); 1573 else if (algo == IEEE80211_AUTH_ALG_OPEN) 1574 sta_auth_open(ni, wh, rssi, nf, seq, status); 1575 else { 1576 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1577 wh, "auth", "unsupported alg %d", algo); 1578 vap->iv_stats.is_rx_auth_unsupported++; 1579 return; 1580 } 1581 break; 1582 } 1583 1584 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 1585 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: { 1586 uint16_t capinfo, associd; 1587 uint16_t status; 1588 1589 if (vap->iv_state != IEEE80211_S_ASSOC) { 1590 vap->iv_stats.is_rx_mgtdiscard++; 1591 return; 1592 } 1593 1594 /* 1595 * asresp frame format 1596 * [2] capability information 1597 * [2] status 1598 * [2] association ID 1599 * [tlv] supported rates 1600 * [tlv] extended supported rates 1601 * [tlv] WME 1602 * [tlv] HT capabilities 1603 * [tlv] HT info 1604 */ 1605 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1606 ni = vap->iv_bss; 1607 capinfo = le16toh(*(uint16_t *)frm); 1608 frm += 2; 1609 status = le16toh(*(uint16_t *)frm); 1610 frm += 2; 1611 if (status != 0) { 1612 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1613 wh->i_addr2, "%sassoc failed (reason %d)", 1614 ISREASSOC(subtype) ? "re" : "", status); 1615 vap->iv_stats.is_rx_auth_fail++; /* XXX */ 1616 return; 1617 } 1618 associd = le16toh(*(uint16_t *)frm); 1619 frm += 2; 1620 1621 rates = xrates = wme = htcap = htinfo = NULL; 1622 while (efrm - frm > 1) { 1623 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1624 switch (*frm) { 1625 case IEEE80211_ELEMID_RATES: 1626 rates = frm; 1627 break; 1628 case IEEE80211_ELEMID_XRATES: 1629 xrates = frm; 1630 break; 1631 case IEEE80211_ELEMID_HTCAP: 1632 htcap = frm; 1633 break; 1634 case IEEE80211_ELEMID_HTINFO: 1635 htinfo = frm; 1636 break; 1637 case IEEE80211_ELEMID_VENDOR: 1638 if (iswmeoui(frm)) 1639 wme = frm; 1640 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) { 1641 /* 1642 * Accept pre-draft HT ie's if the 1643 * standard ones have not been seen. 1644 */ 1645 if (ishtcapoui(frm)) { 1646 if (htcap == NULL) 1647 htcap = frm; 1648 } else if (ishtinfooui(frm)) { 1649 if (htinfo == NULL) 1650 htinfo = frm; 1651 } 1652 } 1653 /* XXX Atheros OUI support */ 1654 break; 1655 } 1656 frm += frm[1] + 2; 1657 } 1658 1659 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1660 if (xrates != NULL) 1661 IEEE80211_VERIFY_ELEMENT(xrates, 1662 IEEE80211_RATE_MAXSIZE - rates[1], return); 1663 rate = ieee80211_setup_rates(ni, rates, xrates, 1664 IEEE80211_F_JOIN | 1665 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1666 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1667 if (rate & IEEE80211_RATE_BASIC) { 1668 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1669 wh->i_addr2, 1670 "%sassoc failed (rate set mismatch)", 1671 ISREASSOC(subtype) ? "re" : ""); 1672 vap->iv_stats.is_rx_assoc_norate++; 1673 ieee80211_new_state(vap, IEEE80211_S_SCAN, 1674 IEEE80211_SCAN_FAIL_STATUS); 1675 return; 1676 } 1677 1678 ni->ni_capinfo = capinfo; 1679 ni->ni_associd = associd; 1680 if (ni->ni_jointime == 0) 1681 ni->ni_jointime = time_uptime; 1682 if (wme != NULL && 1683 ieee80211_parse_wmeparams(vap, wme, wh) >= 0) { 1684 ni->ni_flags |= IEEE80211_NODE_QOS; 1685 ieee80211_wme_updateparams(vap); 1686 } else 1687 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1688 /* 1689 * Setup HT state according to the negotiation. 1690 * 1691 * NB: shouldn't need to check if HT use is enabled but some 1692 * ap's send back HT ie's even when we don't indicate we 1693 * are HT capable in our AssocReq. 1694 */ 1695 if (htcap != NULL && htinfo != NULL && 1696 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1697 ieee80211_ht_node_init(ni); 1698 ieee80211_ht_updateparams(ni, htcap, htinfo); 1699 ieee80211_setup_htrates(ni, htcap, 1700 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1701 ieee80211_setup_basic_htrates(ni, htinfo); 1702 ieee80211_node_setuptxparms(ni); 1703 ieee80211_ratectl_node_init(ni); 1704 } 1705 1706 /* 1707 * Always initialise FF/superg state; we can use this 1708 * for doing A-MSDU encapsulation as well. 1709 */ 1710#ifdef IEEE80211_SUPPORT_SUPERG 1711 ieee80211_ff_node_init(ni); 1712#endif 1713 1714 /* 1715 * Configure state now that we are associated. 1716 * 1717 * XXX may need different/additional driver callbacks? 1718 */ 1719 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) || 1720 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1721 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 1722 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 1723 } else { 1724 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 1725 ic->ic_flags |= IEEE80211_F_USEBARKER; 1726 } 1727 ieee80211_set_shortslottime(ic, 1728 IEEE80211_IS_CHAN_A(ic->ic_curchan) || 1729 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1730 /* 1731 * Honor ERP protection. 1732 * 1733 * NB: ni_erp should zero for non-11g operation. 1734 */ 1735 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1736 (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) 1737 ic->ic_flags |= IEEE80211_F_USEPROT; 1738 else 1739 ic->ic_flags &= ~IEEE80211_F_USEPROT; 1740 IEEE80211_NOTE_MAC(vap, 1741 IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, wh->i_addr2, 1742 "%sassoc success at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 1743 ISREASSOC(subtype) ? "re" : "", 1744 IEEE80211_NODE_AID(ni), 1745 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 1746 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 1747 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "", 1748 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 1749 ni->ni_flags & IEEE80211_NODE_HT ? 1750 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 1751 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 1752 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 1753 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 1754 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 1755 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 1756 ", fast-frames" : "", 1757 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 1758 ", turbo" : "" 1759 ); 1760 ieee80211_new_state(vap, IEEE80211_S_RUN, subtype); 1761 break; 1762 } 1763 1764 case IEEE80211_FC0_SUBTYPE_DEAUTH: { 1765 uint16_t reason; 1766 1767 if (vap->iv_state == IEEE80211_S_SCAN) { 1768 vap->iv_stats.is_rx_mgtdiscard++; 1769 return; 1770 } 1771 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 1772 /* NB: can happen when in promiscuous mode */ 1773 vap->iv_stats.is_rx_mgtdiscard++; 1774 break; 1775 } 1776 1777 /* 1778 * deauth frame format 1779 * [2] reason 1780 */ 1781 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 1782 reason = le16toh(*(uint16_t *)frm); 1783 1784 vap->iv_stats.is_rx_deauth++; 1785 vap->iv_stats.is_rx_deauth_code = reason; 1786 IEEE80211_NODE_STAT(ni, rx_deauth); 1787 1788 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 1789 "recv deauthenticate (reason: %d (%s))", reason, 1790 ieee80211_reason_to_string(reason)); 1791 ieee80211_new_state(vap, IEEE80211_S_AUTH, 1792 (reason << 8) | IEEE80211_FC0_SUBTYPE_DEAUTH); 1793 break; 1794 } 1795 1796 case IEEE80211_FC0_SUBTYPE_DISASSOC: { 1797 uint16_t reason; 1798 1799 if (vap->iv_state != IEEE80211_S_RUN && 1800 vap->iv_state != IEEE80211_S_ASSOC && 1801 vap->iv_state != IEEE80211_S_AUTH) { 1802 vap->iv_stats.is_rx_mgtdiscard++; 1803 return; 1804 } 1805 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 1806 /* NB: can happen when in promiscuous mode */ 1807 vap->iv_stats.is_rx_mgtdiscard++; 1808 break; 1809 } 1810 1811 /* 1812 * disassoc frame format 1813 * [2] reason 1814 */ 1815 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 1816 reason = le16toh(*(uint16_t *)frm); 1817 1818 vap->iv_stats.is_rx_disassoc++; 1819 vap->iv_stats.is_rx_disassoc_code = reason; 1820 IEEE80211_NODE_STAT(ni, rx_disassoc); 1821 1822 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 1823 "recv disassociate (reason: %d (%s))", reason, 1824 ieee80211_reason_to_string(reason)); 1825 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 1826 break; 1827 } 1828 1829 case IEEE80211_FC0_SUBTYPE_ACTION: 1830 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 1831 if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 1832 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1833 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1834 wh, NULL, "%s", "not for us"); 1835 vap->iv_stats.is_rx_mgtdiscard++; 1836 } else if (vap->iv_state != IEEE80211_S_RUN) { 1837 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1838 wh, NULL, "wrong state %s", 1839 ieee80211_state_name[vap->iv_state]); 1840 vap->iv_stats.is_rx_mgtdiscard++; 1841 } else { 1842 if (ieee80211_parse_action(ni, m0) == 0) 1843 (void)ic->ic_recv_action(ni, wh, frm, efrm); 1844 } 1845 break; 1846 1847 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1848 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 1849 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1850 case IEEE80211_FC0_SUBTYPE_TIMING_ADV: 1851 case IEEE80211_FC0_SUBTYPE_ATIM: 1852 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1853 wh, NULL, "%s", "not handled"); 1854 vap->iv_stats.is_rx_mgtdiscard++; 1855 break; 1856 1857 default: 1858 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1859 wh, "mgt", "subtype 0x%x not handled", subtype); 1860 vap->iv_stats.is_rx_badsubtype++; 1861 break; 1862 } 1863#undef ISREASSOC 1864#undef ISPROBE 1865} 1866 1867static void 1868sta_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 1869{ 1870 switch (subtype) { 1871 case IEEE80211_FC0_SUBTYPE_BAR: 1872 ieee80211_recv_bar(ni, m); 1873 break; 1874 } 1875} 1876