1 /*- 2 * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #include <sys/cdefs.h> 27 #ifdef __FreeBSD__ 28 __FBSDID("$FreeBSD$"); 29 #endif 30 31 /* 32 * IEEE 802.11 Station mode support. 33 */ 34 #include "opt_inet.h" 35 #include "opt_wlan.h" 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/mbuf.h> 40 #include <sys/malloc.h> 41 #include <sys/kernel.h> 42 43 #include <sys/socket.h> 44 #include <sys/sockio.h> 45 #include <sys/endian.h> 46 #include <sys/errno.h> 47 #include <sys/proc.h> 48 #include <sys/sysctl.h> 49 50 #include <net/if.h> 51 #include <net/if_media.h> 52 #include <net/if_llc.h> 53 #include <net/if_dl.h> 54 #include <net/if_var.h> 55 #include <net/ethernet.h> 56 57 #include <net/bpf.h> 58 59 #include <netproto/802_11/ieee80211_var.h> 60 #include <netproto/802_11/ieee80211_sta.h> 61 #include <netproto/802_11/ieee80211_input.h> 62 #ifdef IEEE80211_SUPPORT_SUPERG 63 #include <netproto/802_11/ieee80211_superg.h> 64 #endif 65 #include <netproto/802_11/ieee80211_ratectl.h> 66 #include <netproto/802_11/ieee80211_sta.h> 67 68 #define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2) 69 70 static void sta_vattach(struct ieee80211vap *); 71 static void sta_beacon_miss(struct ieee80211vap *); 72 static int sta_newstate(struct ieee80211vap *, enum ieee80211_state, int); 73 static int sta_input(struct ieee80211_node *, struct mbuf *, 74 const struct ieee80211_rx_stats *, int, int); 75 static void sta_recv_mgmt(struct ieee80211_node *, struct mbuf *, 76 int subtype, const struct ieee80211_rx_stats *, int rssi, int nf); 77 static void sta_recv_ctl(struct ieee80211_node *, struct mbuf *, int subtype); 78 79 void 80 ieee80211_sta_attach(struct ieee80211com *ic) 81 { 82 ic->ic_vattach[IEEE80211_M_STA] = sta_vattach; 83 } 84 85 void 86 ieee80211_sta_detach(struct ieee80211com *ic) 87 { 88 } 89 90 static void 91 sta_vdetach(struct ieee80211vap *vap) 92 { 93 } 94 95 static void 96 sta_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 */ 111 static void 112 sta_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 */ 188 static void 189 sta_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 } 208 209 /* 210 * IEEE80211_M_STA vap state machine handler. 211 * This routine handles the main states in the 802.11 protocol. 212 */ 213 static int 214 sta_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 215 { 216 struct ieee80211com *ic = vap->iv_ic; 217 struct ieee80211_node *ni; 218 enum ieee80211_state ostate; 219 220 IEEE80211_LOCK_ASSERT(ic); 221 222 ostate = vap->iv_state; 223 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 224 __func__, ieee80211_state_name[ostate], 225 ieee80211_state_name[nstate], arg); 226 vap->iv_state = nstate; /* state transition */ 227 callout_stop(&vap->iv_mgtsend); /* XXX callout_drain */ 228 if (ostate != IEEE80211_S_SCAN) 229 ieee80211_cancel_scan(vap); /* background scan */ 230 ni = vap->iv_bss; /* NB: no reference held */ 231 if (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS) 232 callout_stop(&vap->iv_swbmiss); 233 switch (nstate) { 234 case IEEE80211_S_INIT: 235 switch (ostate) { 236 case IEEE80211_S_SLEEP: 237 /* XXX wakeup */ 238 /* XXX driver hook to wakeup the hardware? */ 239 case IEEE80211_S_RUN: 240 IEEE80211_SEND_MGMT(ni, 241 IEEE80211_FC0_SUBTYPE_DISASSOC, 242 IEEE80211_REASON_ASSOC_LEAVE); 243 ieee80211_sta_leave(ni); 244 break; 245 case IEEE80211_S_ASSOC: 246 IEEE80211_SEND_MGMT(ni, 247 IEEE80211_FC0_SUBTYPE_DEAUTH, 248 IEEE80211_REASON_AUTH_LEAVE); 249 break; 250 case IEEE80211_S_SCAN: 251 ieee80211_cancel_scan(vap); 252 break; 253 default: 254 goto invalid; 255 } 256 if (ostate != IEEE80211_S_INIT) { 257 /* NB: optimize INIT -> INIT case */ 258 ieee80211_reset_bss(vap); 259 } 260 if (vap->iv_auth->ia_detach != NULL) 261 vap->iv_auth->ia_detach(vap); 262 break; 263 case IEEE80211_S_SCAN: 264 switch (ostate) { 265 case IEEE80211_S_INIT: 266 /* 267 * Initiate a scan. We can come here as a result 268 * of an IEEE80211_IOC_SCAN_REQ too in which case 269 * the vap will be marked with IEEE80211_FEXT_SCANREQ 270 * and the scan request parameters will be present 271 * in iv_scanreq. Otherwise we do the default. 272 */ 273 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 274 ieee80211_check_scan(vap, 275 vap->iv_scanreq_flags, 276 vap->iv_scanreq_duration, 277 vap->iv_scanreq_mindwell, 278 vap->iv_scanreq_maxdwell, 279 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 280 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 281 } else 282 ieee80211_check_scan_current(vap); 283 break; 284 case IEEE80211_S_SCAN: 285 case IEEE80211_S_AUTH: 286 case IEEE80211_S_ASSOC: 287 /* 288 * These can happen either because of a timeout 289 * on an assoc/auth response or because of a 290 * change in state that requires a reset. For 291 * the former we're called with a non-zero arg 292 * that is the cause for the failure; pass this 293 * to the scan code so it can update state. 294 * Otherwise trigger a new scan unless we're in 295 * manual roaming mode in which case an application 296 * must issue an explicit scan request. 297 */ 298 if (arg != 0) 299 ieee80211_scan_assoc_fail(vap, 300 vap->iv_bss->ni_macaddr, arg); 301 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 302 ieee80211_check_scan_current(vap); 303 break; 304 case IEEE80211_S_SLEEP: /* beacon miss */ 305 /* 306 * XXX if in sleep we need to wakeup the hardware. 307 */ 308 /* FALLTHROUGH */ 309 case IEEE80211_S_RUN: /* beacon miss */ 310 /* 311 * Beacon miss. Notify user space and if not 312 * under control of a user application (roaming 313 * manual) kick off a scan to re-connect. 314 */ 315 316 ieee80211_sta_leave(ni); 317 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 318 ieee80211_check_scan_current(vap); 319 break; 320 default: 321 goto invalid; 322 } 323 break; 324 case IEEE80211_S_AUTH: 325 switch (ostate) { 326 case IEEE80211_S_INIT: 327 case IEEE80211_S_SCAN: 328 IEEE80211_SEND_MGMT(ni, 329 IEEE80211_FC0_SUBTYPE_AUTH, 1); 330 break; 331 case IEEE80211_S_AUTH: 332 case IEEE80211_S_ASSOC: 333 switch (arg & 0xff) { 334 case IEEE80211_FC0_SUBTYPE_AUTH: 335 /* ??? */ 336 IEEE80211_SEND_MGMT(ni, 337 IEEE80211_FC0_SUBTYPE_AUTH, 2); 338 break; 339 case IEEE80211_FC0_SUBTYPE_DEAUTH: 340 sta_authretry(vap, ni, arg>>8); 341 break; 342 } 343 break; 344 case IEEE80211_S_RUN: 345 switch (arg & 0xff) { 346 case IEEE80211_FC0_SUBTYPE_AUTH: 347 IEEE80211_SEND_MGMT(ni, 348 IEEE80211_FC0_SUBTYPE_AUTH, 2); 349 vap->iv_state = ostate; /* stay RUN */ 350 break; 351 case IEEE80211_FC0_SUBTYPE_DEAUTH: 352 ieee80211_sta_leave(ni); 353 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 354 /* try to reauth */ 355 IEEE80211_SEND_MGMT(ni, 356 IEEE80211_FC0_SUBTYPE_AUTH, 1); 357 } 358 break; 359 } 360 break; 361 default: 362 goto invalid; 363 } 364 break; 365 case IEEE80211_S_ASSOC: 366 switch (ostate) { 367 case IEEE80211_S_AUTH: 368 case IEEE80211_S_ASSOC: 369 IEEE80211_SEND_MGMT(ni, 370 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 371 break; 372 case IEEE80211_S_SLEEP: /* cannot happen */ 373 case IEEE80211_S_RUN: 374 ieee80211_sta_leave(ni); 375 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 376 IEEE80211_SEND_MGMT(ni, arg ? 377 IEEE80211_FC0_SUBTYPE_REASSOC_REQ : 378 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 379 } 380 break; 381 default: 382 goto invalid; 383 } 384 break; 385 case IEEE80211_S_RUN: 386 if (vap->iv_flags & IEEE80211_F_WPA) { 387 /* XXX validate prerequisites */ 388 } 389 switch (ostate) { 390 case IEEE80211_S_RUN: 391 case IEEE80211_S_CSA: 392 break; 393 case IEEE80211_S_AUTH: /* when join is done in fw */ 394 case IEEE80211_S_ASSOC: 395 #ifdef IEEE80211_DEBUG 396 if (ieee80211_msg_debug(vap)) { 397 ieee80211_note(vap, "%s with %s ssid ", 398 (vap->iv_opmode == IEEE80211_M_STA ? 399 "associated" : "synchronized"), 400 ether_sprintf(ni->ni_bssid)); 401 ieee80211_print_essid(vap->iv_bss->ni_essid, 402 ni->ni_esslen); 403 /* XXX MCS/HT */ 404 kprintf(" channel %d start %uMb\n", 405 ieee80211_chan2ieee(ic, ic->ic_curchan), 406 IEEE80211_RATE2MBS(ni->ni_txrate)); 407 } 408 #endif 409 ieee80211_scan_assoc_success(vap, ni->ni_macaddr); 410 ieee80211_notify_node_join(ni, 411 arg == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 412 break; 413 case IEEE80211_S_SLEEP: 414 /* Wake up from sleep */ 415 vap->iv_sta_ps(vap, 0); 416 break; 417 default: 418 goto invalid; 419 } 420 ieee80211_sync_curchan(ic); 421 if (ostate != IEEE80211_S_RUN && 422 (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS)) { 423 /* 424 * Start s/w beacon miss timer for devices w/o 425 * hardware support. We fudge a bit here since 426 * we're doing this in software. 427 */ 428 vap->iv_swbmiss_period = IEEE80211_TU_TO_TICKS( 429 2 * vap->iv_bmissthreshold * ni->ni_intval); 430 vap->iv_swbmiss_count = 0; 431 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, 432 ieee80211_swbmiss, vap); 433 } 434 /* 435 * When 802.1x is not in use mark the port authorized 436 * at this point so traffic can flow. 437 */ 438 if (ni->ni_authmode != IEEE80211_AUTH_8021X) 439 ieee80211_node_authorize(ni); 440 /* 441 * Fake association when joining an existing bss. 442 * 443 * Don't do this if we're doing SLEEP->RUN. 444 */ 445 if (ic->ic_newassoc != NULL && ostate != IEEE80211_S_SLEEP) 446 ic->ic_newassoc(vap->iv_bss, (ostate != IEEE80211_S_RUN)); 447 break; 448 case IEEE80211_S_CSA: 449 if (ostate != IEEE80211_S_RUN) 450 goto invalid; 451 break; 452 case IEEE80211_S_SLEEP: 453 vap->iv_sta_ps(vap, 1); 454 break; 455 default: 456 invalid: 457 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 458 "%s: unexpected state transition %s -> %s\n", __func__, 459 ieee80211_state_name[ostate], ieee80211_state_name[nstate]); 460 break; 461 } 462 return 0; 463 } 464 465 /* 466 * Return non-zero if the frame is an echo of a multicast 467 * frame sent by ourself. The dir is known to be DSTODS. 468 */ 469 static __inline int 470 isdstods_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh) 471 { 472 #define QWH4(wh) ((const struct ieee80211_qosframe_addr4 *)wh) 473 #define WH4(wh) ((const struct ieee80211_frame_addr4 *)wh) 474 const uint8_t *sa; 475 476 KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode")); 477 478 if (!IEEE80211_IS_MULTICAST(wh->i_addr3)) 479 return 0; 480 sa = IEEE80211_QOS_HAS_SEQ(wh) ? QWH4(wh)->i_addr4 : WH4(wh)->i_addr4; 481 return IEEE80211_ADDR_EQ(sa, vap->iv_myaddr); 482 #undef WH4 483 #undef QWH4 484 } 485 486 /* 487 * Return non-zero if the frame is an echo of a multicast 488 * frame sent by ourself. The dir is known to be FROMDS. 489 */ 490 static __inline int 491 isfromds_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh) 492 { 493 KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode")); 494 495 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) 496 return 0; 497 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 498 } 499 500 /* 501 * Decide if a received management frame should be 502 * printed when debugging is enabled. This filters some 503 * of the less interesting frames that come frequently 504 * (e.g. beacons). 505 */ 506 static __inline int 507 doprint(struct ieee80211vap *vap, int subtype) 508 { 509 switch (subtype) { 510 case IEEE80211_FC0_SUBTYPE_BEACON: 511 return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN); 512 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 513 return 0; 514 } 515 return 1; 516 } 517 518 /* 519 * Process a received frame. The node associated with the sender 520 * should be supplied. If nothing was found in the node table then 521 * the caller is assumed to supply a reference to iv_bss instead. 522 * The RSSI and a timestamp are also supplied. The RSSI data is used 523 * during AP scanning to select a AP to associate with; it can have 524 * any units so long as values have consistent units and higher values 525 * mean ``better signal''. The receive timestamp is currently not used 526 * by the 802.11 layer. 527 */ 528 static int 529 sta_input(struct ieee80211_node *ni, struct mbuf *m, 530 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 531 { 532 struct ieee80211vap *vap = ni->ni_vap; 533 struct ieee80211com *ic = ni->ni_ic; 534 struct ifnet *ifp = vap->iv_ifp; 535 struct ieee80211_frame *wh; 536 struct ieee80211_key *key; 537 struct ether_header *eh; 538 int hdrspace, need_tap = 1; /* mbuf need to be tapped. */ 539 uint8_t dir, type, subtype, qos; 540 uint8_t *bssid; 541 uint16_t rxseq; 542 543 if (m->m_flags & M_AMPDU_MPDU) { 544 /* 545 * Fastpath for A-MPDU reorder q resubmission. Frames 546 * w/ M_AMPDU_MPDU marked have already passed through 547 * here but were received out of order and been held on 548 * the reorder queue. When resubmitted they are marked 549 * with the M_AMPDU_MPDU flag and we can bypass most of 550 * the normal processing. 551 */ 552 wh = mtod(m, struct ieee80211_frame *); 553 type = IEEE80211_FC0_TYPE_DATA; 554 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 555 subtype = IEEE80211_FC0_SUBTYPE_QOS; 556 hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ 557 goto resubmit_ampdu; 558 } 559 560 KASSERT(ni != NULL, ("null node")); 561 ni->ni_inact = ni->ni_inact_reload; 562 563 type = -1; /* undefined */ 564 565 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 566 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 567 ni->ni_macaddr, NULL, 568 "too short (1): len %u", m->m_pkthdr.len); 569 vap->iv_stats.is_rx_tooshort++; 570 goto out; 571 } 572 /* 573 * Bit of a cheat here, we use a pointer for a 3-address 574 * frame format but don't reference fields past outside 575 * ieee80211_frame_min w/o first validating the data is 576 * present. 577 */ 578 wh = mtod(m, struct ieee80211_frame *); 579 580 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 581 IEEE80211_FC0_VERSION_0) { 582 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 583 ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x", 584 wh->i_fc[0], wh->i_fc[1]); 585 vap->iv_stats.is_rx_badversion++; 586 goto err; 587 } 588 589 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 590 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 591 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 592 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 593 bssid = wh->i_addr2; 594 if (!IEEE80211_ADDR_EQ(bssid, ni->ni_bssid)) { 595 /* not interested in */ 596 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 597 bssid, NULL, "%s", "not to bss"); 598 vap->iv_stats.is_rx_wrongbss++; 599 goto out; 600 } 601 602 /* 603 * Some devices may be in a promiscuous mode 604 * where they receive frames for multiple station 605 * addresses. 606 * 607 * If we receive a data frame that isn't 608 * destined to our VAP MAC, drop it. 609 * 610 * XXX TODO: This is only enforced when not scanning; 611 * XXX it assumes a software-driven scan will put the NIC 612 * XXX into a "no data frames" mode before setting this 613 * XXX flag. Otherwise it may be possible that we'll still 614 * XXX process data frames whilst scanning. 615 */ 616 if ((! IEEE80211_IS_MULTICAST(wh->i_addr1)) 617 && (! IEEE80211_ADDR_EQ(wh->i_addr1, IF_LLADDR(ifp)))) { 618 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 619 bssid, NULL, "not to cur sta: lladdr=%s, addr1=%s", 620 ether_sprintf(IF_LLADDR(ifp)), 621 ether_sprintf(wh->i_addr1)); 622 vap->iv_stats.is_rx_wrongbss++; 623 goto out; 624 } 625 626 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 627 ni->ni_noise = nf; 628 if ( IEEE80211_HAS_SEQ(type, subtype) && 629 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 630 uint8_t tid = ieee80211_gettid(wh); 631 if (IEEE80211_QOS_HAS_SEQ(wh) && 632 TID_TO_WME_AC(tid) >= WME_AC_VI) 633 ic->ic_wme.wme_hipri_traffic++; 634 rxseq = le16toh(*(uint16_t *)wh->i_seq); 635 if (! ieee80211_check_rxseq(ni, wh)) { 636 /* duplicate, discard */ 637 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 638 bssid, "duplicate", 639 "seqno <%u,%u> fragno <%u,%u> tid %u", 640 rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 641 ni->ni_rxseqs[tid] >> 642 IEEE80211_SEQ_SEQ_SHIFT, 643 rxseq & IEEE80211_SEQ_FRAG_MASK, 644 ni->ni_rxseqs[tid] & 645 IEEE80211_SEQ_FRAG_MASK, 646 tid); 647 vap->iv_stats.is_rx_dup++; 648 IEEE80211_NODE_STAT(ni, rx_dup); 649 goto out; 650 } 651 ni->ni_rxseqs[tid] = rxseq; 652 } 653 } 654 655 switch (type) { 656 case IEEE80211_FC0_TYPE_DATA: 657 hdrspace = ieee80211_hdrspace(ic, wh); 658 if (m->m_len < hdrspace && 659 (m = m_pullup(m, hdrspace)) == NULL) { 660 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 661 ni->ni_macaddr, NULL, 662 "data too short: expecting %u", hdrspace); 663 vap->iv_stats.is_rx_tooshort++; 664 goto out; /* XXX */ 665 } 666 /* 667 * Handle A-MPDU re-ordering. If the frame is to be 668 * processed directly then ieee80211_ampdu_reorder 669 * will return 0; otherwise it has consumed the mbuf 670 * and we should do nothing more with it. 671 */ 672 if ((m->m_flags & M_AMPDU) && 673 (dir == IEEE80211_FC1_DIR_FROMDS || 674 dir == IEEE80211_FC1_DIR_DSTODS) && 675 ieee80211_ampdu_reorder(ni, m) != 0) { 676 m = NULL; 677 goto out; 678 } 679 resubmit_ampdu: 680 if (dir == IEEE80211_FC1_DIR_FROMDS) { 681 if ((ifp->if_flags & IFF_SIMPLEX) && 682 isfromds_mcastecho(vap, wh)) { 683 /* 684 * In IEEE802.11 network, multicast 685 * packets sent from "me" are broadcast 686 * from the AP; silently discard for 687 * SIMPLEX interface. 688 */ 689 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 690 wh, "data", "%s", "multicast echo"); 691 vap->iv_stats.is_rx_mcastecho++; 692 goto out; 693 } 694 if ((vap->iv_flags & IEEE80211_F_DWDS) && 695 IEEE80211_IS_MULTICAST(wh->i_addr1)) { 696 /* 697 * DWDS sta's must drop 3-address mcast frames 698 * as they will be sent separately as a 4-addr 699 * frame. Accepting the 3-addr frame will 700 * confuse the bridge into thinking the sending 701 * sta is located at the end of WDS link. 702 */ 703 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 704 "3-address data", "%s", "DWDS enabled"); 705 vap->iv_stats.is_rx_mcastecho++; 706 goto out; 707 } 708 } else if (dir == IEEE80211_FC1_DIR_DSTODS) { 709 if ((vap->iv_flags & IEEE80211_F_DWDS) == 0) { 710 IEEE80211_DISCARD(vap, 711 IEEE80211_MSG_INPUT, wh, "4-address data", 712 "%s", "DWDS not enabled"); 713 vap->iv_stats.is_rx_wrongdir++; 714 goto out; 715 } 716 if ((ifp->if_flags & IFF_SIMPLEX) && 717 isdstods_mcastecho(vap, wh)) { 718 /* 719 * In IEEE802.11 network, multicast 720 * packets sent from "me" are broadcast 721 * from the AP; silently discard for 722 * SIMPLEX interface. 723 */ 724 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 725 "4-address data", "%s", "multicast echo"); 726 vap->iv_stats.is_rx_mcastecho++; 727 goto out; 728 } 729 } else { 730 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 731 "data", "incorrect dir 0x%x", dir); 732 vap->iv_stats.is_rx_wrongdir++; 733 goto out; 734 } 735 736 /* 737 * Handle privacy requirements. Note that we 738 * must not be preempted from here until after 739 * we (potentially) call ieee80211_crypto_demic; 740 * otherwise we may violate assumptions in the 741 * crypto cipher modules used to do delayed update 742 * of replay sequence numbers. 743 */ 744 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 745 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 746 /* 747 * Discard encrypted frames when privacy is off. 748 */ 749 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 750 wh, "WEP", "%s", "PRIVACY off"); 751 vap->iv_stats.is_rx_noprivacy++; 752 IEEE80211_NODE_STAT(ni, rx_noprivacy); 753 goto out; 754 } 755 key = ieee80211_crypto_decap(ni, m, hdrspace); 756 if (key == NULL) { 757 /* NB: stats+msgs handled in crypto_decap */ 758 IEEE80211_NODE_STAT(ni, rx_wepfail); 759 goto out; 760 } 761 wh = mtod(m, struct ieee80211_frame *); 762 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 763 } else { 764 /* XXX M_WEP and IEEE80211_F_PRIVACY */ 765 key = NULL; 766 } 767 768 /* 769 * Save QoS bits for use below--before we strip the header. 770 */ 771 if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { 772 qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? 773 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : 774 ((struct ieee80211_qosframe *)wh)->i_qos[0]; 775 } else 776 qos = 0; 777 778 /* 779 * Next up, any fragmentation. 780 */ 781 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 782 m = ieee80211_defrag(ni, m, hdrspace); 783 if (m == NULL) { 784 /* Fragment dropped or frame not complete yet */ 785 goto out; 786 } 787 } 788 wh = NULL; /* no longer valid, catch any uses */ 789 790 /* 791 * Next strip any MSDU crypto bits. 792 */ 793 if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) { 794 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 795 ni->ni_macaddr, "data", "%s", "demic error"); 796 vap->iv_stats.is_rx_demicfail++; 797 IEEE80211_NODE_STAT(ni, rx_demicfail); 798 goto out; 799 } 800 801 /* copy to listener after decrypt */ 802 if (ieee80211_radiotap_active_vap(vap)) 803 ieee80211_radiotap_rx(vap, m); 804 need_tap = 0; 805 806 /* 807 * Finally, strip the 802.11 header. 808 */ 809 m = ieee80211_decap(vap, m, hdrspace); 810 if (m == NULL) { 811 /* XXX mask bit to check for both */ 812 /* don't count Null data frames as errors */ 813 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 814 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 815 goto out; 816 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 817 ni->ni_macaddr, "data", "%s", "decap error"); 818 vap->iv_stats.is_rx_decap++; 819 IEEE80211_NODE_STAT(ni, rx_decap); 820 goto err; 821 } 822 eh = mtod(m, struct ether_header *); 823 if (!ieee80211_node_is_authorized(ni)) { 824 /* 825 * Deny any non-PAE frames received prior to 826 * authorization. For open/shared-key 827 * authentication the port is mark authorized 828 * after authentication completes. For 802.1x 829 * the port is not marked authorized by the 830 * authenticator until the handshake has completed. 831 */ 832 if (eh->ether_type != htons(ETHERTYPE_PAE)) { 833 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 834 eh->ether_shost, "data", 835 "unauthorized port: ether type 0x%x len %u", 836 eh->ether_type, m->m_pkthdr.len); 837 vap->iv_stats.is_rx_unauth++; 838 IEEE80211_NODE_STAT(ni, rx_unauth); 839 goto err; 840 } 841 } else { 842 /* 843 * When denying unencrypted frames, discard 844 * any non-PAE frames received without encryption. 845 */ 846 if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && 847 (key == NULL && (m->m_flags & M_WEP) == 0) && 848 eh->ether_type != htons(ETHERTYPE_PAE)) { 849 /* 850 * Drop unencrypted frames. 851 */ 852 vap->iv_stats.is_rx_unencrypted++; 853 IEEE80211_NODE_STAT(ni, rx_unencrypted); 854 goto out; 855 } 856 } 857 /* XXX require HT? */ 858 if (qos & IEEE80211_QOS_AMSDU) { 859 m = ieee80211_decap_amsdu(ni, m); 860 if (m == NULL) 861 return IEEE80211_FC0_TYPE_DATA; 862 } else { 863 #ifdef IEEE80211_SUPPORT_SUPERG 864 m = ieee80211_decap_fastframe(vap, ni, m); 865 if (m == NULL) 866 return IEEE80211_FC0_TYPE_DATA; 867 #endif 868 } 869 ieee80211_deliver_data(vap, ni, m); 870 return IEEE80211_FC0_TYPE_DATA; 871 872 case IEEE80211_FC0_TYPE_MGT: 873 vap->iv_stats.is_rx_mgmt++; 874 IEEE80211_NODE_STAT(ni, rx_mgmt); 875 if (dir != IEEE80211_FC1_DIR_NODS) { 876 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 877 wh, "data", "incorrect dir 0x%x", dir); 878 vap->iv_stats.is_rx_wrongdir++; 879 goto err; 880 } 881 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 882 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 883 ni->ni_macaddr, "mgt", "too short: len %u", 884 m->m_pkthdr.len); 885 vap->iv_stats.is_rx_tooshort++; 886 goto out; 887 } 888 #ifdef IEEE80211_DEBUG 889 if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) || 890 ieee80211_msg_dumppkts(vap)) { 891 if_printf(ifp, "received %s from %s rssi %d\n", 892 ieee80211_mgt_subtype_name[subtype >> 893 IEEE80211_FC0_SUBTYPE_SHIFT], 894 ether_sprintf(wh->i_addr2), rssi); 895 } 896 #endif 897 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 898 if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) { 899 /* 900 * Only shared key auth frames with a challenge 901 * should be encrypted, discard all others. 902 */ 903 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 904 wh, ieee80211_mgt_subtype_name[subtype >> 905 IEEE80211_FC0_SUBTYPE_SHIFT], 906 "%s", "WEP set but not permitted"); 907 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 908 goto out; 909 } 910 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 911 /* 912 * Discard encrypted frames when privacy is off. 913 */ 914 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 915 wh, "mgt", "%s", "WEP set but PRIVACY off"); 916 vap->iv_stats.is_rx_noprivacy++; 917 goto out; 918 } 919 hdrspace = ieee80211_hdrspace(ic, wh); 920 key = ieee80211_crypto_decap(ni, m, hdrspace); 921 if (key == NULL) { 922 /* NB: stats+msgs handled in crypto_decap */ 923 goto out; 924 } 925 wh = mtod(m, struct ieee80211_frame *); 926 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 927 } 928 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); 929 goto out; 930 931 case IEEE80211_FC0_TYPE_CTL: 932 vap->iv_stats.is_rx_ctl++; 933 IEEE80211_NODE_STAT(ni, rx_ctrl); 934 vap->iv_recv_ctl(ni, m, subtype); 935 goto out; 936 937 default: 938 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 939 wh, NULL, "bad frame type 0x%x", type); 940 /* should not come here */ 941 break; 942 } 943 err: 944 IFNET_STAT_INC(ifp, ierrors, 1); 945 out: 946 if (m != NULL) { 947 if (need_tap && ieee80211_radiotap_active_vap(vap)) 948 ieee80211_radiotap_rx(vap, m); 949 m_freem(m); 950 } 951 return type; 952 } 953 954 static void 955 sta_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh, 956 int rssi, int nf, uint16_t seq, uint16_t status) 957 { 958 struct ieee80211vap *vap = ni->ni_vap; 959 960 if (ni->ni_authmode == IEEE80211_AUTH_SHARED) { 961 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 962 ni->ni_macaddr, "open auth", 963 "bad sta auth mode %u", ni->ni_authmode); 964 vap->iv_stats.is_rx_bad_auth++; /* XXX */ 965 return; 966 } 967 if (vap->iv_state != IEEE80211_S_AUTH || 968 seq != IEEE80211_AUTH_OPEN_RESPONSE) { 969 vap->iv_stats.is_rx_bad_auth++; 970 return; 971 } 972 if (status != 0) { 973 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 974 ni, "open auth failed (reason %d)", status); 975 vap->iv_stats.is_rx_auth_fail++; 976 vap->iv_stats.is_rx_authfail_code = status; 977 ieee80211_new_state(vap, IEEE80211_S_SCAN, 978 IEEE80211_SCAN_FAIL_STATUS); 979 } else 980 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 981 } 982 983 static void 984 sta_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh, 985 uint8_t *frm, uint8_t *efrm, int rssi, int nf, 986 uint16_t seq, uint16_t status) 987 { 988 struct ieee80211vap *vap = ni->ni_vap; 989 uint8_t *challenge; 990 int estatus; 991 992 /* 993 * NB: this can happen as we allow pre-shared key 994 * authentication to be enabled w/o wep being turned 995 * on so that configuration of these can be done 996 * in any order. It may be better to enforce the 997 * ordering in which case this check would just be 998 * for sanity/consistency. 999 */ 1000 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 1001 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1002 ni->ni_macaddr, "shared key auth", 1003 "%s", " PRIVACY is disabled"); 1004 estatus = IEEE80211_STATUS_ALG; 1005 goto bad; 1006 } 1007 /* 1008 * Pre-shared key authentication is evil; accept 1009 * it only if explicitly configured (it is supported 1010 * mainly for compatibility with clients like OS X). 1011 */ 1012 if (ni->ni_authmode != IEEE80211_AUTH_AUTO && 1013 ni->ni_authmode != IEEE80211_AUTH_SHARED) { 1014 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1015 ni->ni_macaddr, "shared key auth", 1016 "bad sta auth mode %u", ni->ni_authmode); 1017 vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */ 1018 estatus = IEEE80211_STATUS_ALG; 1019 goto bad; 1020 } 1021 1022 challenge = NULL; 1023 if (frm + 1 < efrm) { 1024 if ((frm[1] + 2) > (efrm - frm)) { 1025 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1026 ni->ni_macaddr, "shared key auth", 1027 "ie %d/%ld too long", 1028 frm[0], (frm[1] + 2) - (efrm - frm)); 1029 vap->iv_stats.is_rx_bad_auth++; 1030 estatus = IEEE80211_STATUS_CHALLENGE; 1031 goto bad; 1032 } 1033 if (*frm == IEEE80211_ELEMID_CHALLENGE) 1034 challenge = frm; 1035 frm += frm[1] + 2; 1036 } 1037 switch (seq) { 1038 case IEEE80211_AUTH_SHARED_CHALLENGE: 1039 case IEEE80211_AUTH_SHARED_RESPONSE: 1040 if (challenge == NULL) { 1041 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1042 ni->ni_macaddr, "shared key auth", 1043 "%s", "no challenge"); 1044 vap->iv_stats.is_rx_bad_auth++; 1045 estatus = IEEE80211_STATUS_CHALLENGE; 1046 goto bad; 1047 } 1048 if (challenge[1] != IEEE80211_CHALLENGE_LEN) { 1049 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1050 ni->ni_macaddr, "shared key auth", 1051 "bad challenge len %d", challenge[1]); 1052 vap->iv_stats.is_rx_bad_auth++; 1053 estatus = IEEE80211_STATUS_CHALLENGE; 1054 goto bad; 1055 } 1056 default: 1057 break; 1058 } 1059 if (vap->iv_state != IEEE80211_S_AUTH) 1060 return; 1061 switch (seq) { 1062 case IEEE80211_AUTH_SHARED_PASS: 1063 if (ni->ni_challenge != NULL) { 1064 kfree(ni->ni_challenge, M_80211_NODE); 1065 ni->ni_challenge = NULL; 1066 } 1067 if (status != 0) { 1068 IEEE80211_NOTE_FRAME(vap, 1069 IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, wh, 1070 "shared key auth failed (reason %d)", status); 1071 vap->iv_stats.is_rx_auth_fail++; 1072 vap->iv_stats.is_rx_authfail_code = status; 1073 return; 1074 } 1075 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 1076 break; 1077 case IEEE80211_AUTH_SHARED_CHALLENGE: 1078 if (!ieee80211_alloc_challenge(ni)) 1079 return; 1080 /* XXX could optimize by passing recvd challenge */ 1081 memcpy(ni->ni_challenge, &challenge[2], challenge[1]); 1082 IEEE80211_SEND_MGMT(ni, 1083 IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 1084 break; 1085 default: 1086 IEEE80211_DISCARD(vap, IEEE80211_MSG_AUTH, 1087 wh, "shared key auth", "bad seq %d", seq); 1088 vap->iv_stats.is_rx_bad_auth++; 1089 return; 1090 } 1091 return; 1092 bad: 1093 /* 1094 * Kick the state machine. This short-circuits 1095 * using the mgt frame timeout to trigger the 1096 * state transition. 1097 */ 1098 if (vap->iv_state == IEEE80211_S_AUTH) 1099 ieee80211_new_state(vap, IEEE80211_S_SCAN, 1100 IEEE80211_SCAN_FAIL_STATUS); 1101 } 1102 1103 int 1104 ieee80211_parse_wmeparams(struct ieee80211vap *vap, uint8_t *frm, 1105 const struct ieee80211_frame *wh) 1106 { 1107 #define MS(_v, _f) (((_v) & _f) >> _f##_S) 1108 struct ieee80211_wme_state *wme = &vap->iv_ic->ic_wme; 1109 u_int len = frm[1], qosinfo; 1110 int i; 1111 1112 if (len < sizeof(struct ieee80211_wme_param)-2) { 1113 IEEE80211_DISCARD_IE(vap, 1114 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WME, 1115 wh, "WME", "too short, len %u", len); 1116 return -1; 1117 } 1118 qosinfo = frm[__offsetof(struct ieee80211_wme_param, param_qosInfo)]; 1119 qosinfo &= WME_QOSINFO_COUNT; 1120 /* XXX do proper check for wraparound */ 1121 if (qosinfo == wme->wme_wmeChanParams.cap_info) 1122 return 0; 1123 frm += __offsetof(struct ieee80211_wme_param, params_acParams); 1124 for (i = 0; i < WME_NUM_AC; i++) { 1125 struct wmeParams *wmep = 1126 &wme->wme_wmeChanParams.cap_wmeParams[i]; 1127 /* NB: ACI not used */ 1128 wmep->wmep_acm = MS(frm[0], WME_PARAM_ACM); 1129 wmep->wmep_aifsn = MS(frm[0], WME_PARAM_AIFSN); 1130 wmep->wmep_logcwmin = MS(frm[1], WME_PARAM_LOGCWMIN); 1131 wmep->wmep_logcwmax = MS(frm[1], WME_PARAM_LOGCWMAX); 1132 wmep->wmep_txopLimit = LE_READ_2(frm+2); 1133 frm += 4; 1134 } 1135 wme->wme_wmeChanParams.cap_info = qosinfo; 1136 return 1; 1137 #undef MS 1138 } 1139 1140 /* 1141 * Process 11h Channel Switch Announcement (CSA) ie. If this 1142 * is the first CSA then initiate the switch. Otherwise we 1143 * track state and trigger completion and/or cancel of the switch. 1144 * XXX should be public for IBSS use 1145 */ 1146 static void 1147 ieee80211_parse_csaparams(struct ieee80211vap *vap, uint8_t *frm, 1148 const struct ieee80211_frame *wh) 1149 { 1150 struct ieee80211com *ic = vap->iv_ic; 1151 const struct ieee80211_csa_ie *csa = 1152 (const struct ieee80211_csa_ie *) frm; 1153 1154 KASSERT(vap->iv_state >= IEEE80211_S_RUN, 1155 ("state %s", ieee80211_state_name[vap->iv_state])); 1156 1157 if (csa->csa_mode > 1) { 1158 IEEE80211_DISCARD_IE(vap, 1159 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1160 wh, "CSA", "invalid mode %u", csa->csa_mode); 1161 return; 1162 } 1163 IEEE80211_LOCK(ic); 1164 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 1165 /* 1166 * Convert the channel number to a channel reference. We 1167 * try first to preserve turbo attribute of the current 1168 * channel then fallback. Note this will not work if the 1169 * CSA specifies a channel that requires a band switch (e.g. 1170 * 11a => 11g). This is intentional as 11h is defined only 1171 * for 5GHz/11a and because the switch does not involve a 1172 * reassociation, protocol state (capabilities, negotated 1173 * rates, etc) may/will be wrong. 1174 */ 1175 struct ieee80211_channel *c = 1176 ieee80211_find_channel_byieee(ic, csa->csa_newchan, 1177 (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALLTURBO)); 1178 if (c == NULL) { 1179 c = ieee80211_find_channel_byieee(ic, 1180 csa->csa_newchan, 1181 (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALL)); 1182 if (c == NULL) { 1183 IEEE80211_DISCARD_IE(vap, 1184 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1185 wh, "CSA", "invalid channel %u", 1186 csa->csa_newchan); 1187 goto done; 1188 } 1189 } 1190 #if IEEE80211_CSA_COUNT_MIN > 0 1191 if (csa->csa_count < IEEE80211_CSA_COUNT_MIN) { 1192 /* 1193 * Require at least IEEE80211_CSA_COUNT_MIN count to 1194 * reduce the risk of being redirected by a fabricated 1195 * CSA. If a valid CSA is dropped we'll still get a 1196 * beacon miss when the AP leaves the channel so we'll 1197 * eventually follow to the new channel. 1198 * 1199 * NOTE: this violates the 11h spec that states that 1200 * count may be any value and if 0 then a switch 1201 * should happen asap. 1202 */ 1203 IEEE80211_DISCARD_IE(vap, 1204 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1205 wh, "CSA", "count %u too small, must be >= %u", 1206 csa->csa_count, IEEE80211_CSA_COUNT_MIN); 1207 goto done; 1208 } 1209 #endif 1210 ieee80211_csa_startswitch(ic, c, csa->csa_mode, csa->csa_count); 1211 } else { 1212 /* 1213 * Validate this ie against the initial CSA. We require 1214 * mode and channel not change and the count must be 1215 * monotonically decreasing. This may be pointless and 1216 * canceling the switch as a result may be too paranoid but 1217 * in the worst case if we drop out of CSA because of this 1218 * and the AP does move then we'll just end up taking a 1219 * beacon miss and scan to find the AP. 1220 * 1221 * XXX may want <= on count as we also process ProbeResp 1222 * frames and those may come in w/ the same count as the 1223 * previous beacon; but doing so leaves us open to a stuck 1224 * count until we add a dead-man timer 1225 */ 1226 if (!(csa->csa_count < ic->ic_csa_count && 1227 csa->csa_mode == ic->ic_csa_mode && 1228 csa->csa_newchan == ieee80211_chan2ieee(ic, ic->ic_csa_newchan))) { 1229 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_DOTH, wh, 1230 "CSA ie mismatch, initial ie <%d,%d,%d>, " 1231 "this ie <%d,%d,%d>", ic->ic_csa_mode, 1232 ic->ic_csa_newchan->ic_ieee, ic->ic_csa_count, 1233 csa->csa_mode, csa->csa_newchan, csa->csa_count); 1234 ieee80211_csa_cancelswitch(ic); 1235 } else { 1236 if (csa->csa_count <= 1) 1237 ieee80211_csa_completeswitch(ic); 1238 else 1239 ic->ic_csa_count = csa->csa_count; 1240 } 1241 } 1242 done: 1243 IEEE80211_UNLOCK(ic); 1244 } 1245 1246 /* 1247 * Return non-zero if a background scan may be continued: 1248 * o bg scan is active 1249 * o no channel switch is pending 1250 * o there has not been any traffic recently 1251 * 1252 * Note we do not check if there is an administrative enable; 1253 * this is only done to start the scan. We assume that any 1254 * change in state will be accompanied by a request to cancel 1255 * active scans which will otherwise cause this test to fail. 1256 */ 1257 static __inline int 1258 contbgscan(struct ieee80211vap *vap) 1259 { 1260 struct ieee80211com *ic = vap->iv_ic; 1261 1262 return ((ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN) && 1263 (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && 1264 vap->iv_state == IEEE80211_S_RUN && /* XXX? */ 1265 time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)); 1266 } 1267 1268 /* 1269 * Return non-zero if a backgrond scan may be started: 1270 * o bg scanning is administratively enabled 1271 * o no channel switch is pending 1272 * o we are not boosted on a dynamic turbo channel 1273 * o there has not been a scan recently 1274 * o there has not been any traffic recently 1275 */ 1276 static __inline int 1277 startbgscan(struct ieee80211vap *vap) 1278 { 1279 struct ieee80211com *ic = vap->iv_ic; 1280 1281 return ((vap->iv_flags & IEEE80211_F_BGSCAN) && 1282 (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && 1283 #ifdef IEEE80211_SUPPORT_SUPERG 1284 !IEEE80211_IS_CHAN_DTURBO(ic->ic_curchan) && 1285 #endif 1286 time_after(ticks, ic->ic_lastscan + vap->iv_bgscanintvl) && 1287 time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)); 1288 } 1289 1290 static void 1291 sta_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1292 const struct ieee80211_rx_stats *rxs, 1293 int rssi, int nf) 1294 { 1295 #define ISPROBE(_st) ((_st) == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1296 #define ISREASSOC(_st) ((_st) == IEEE80211_FC0_SUBTYPE_REASSOC_RESP) 1297 struct ieee80211vap *vap = ni->ni_vap; 1298 struct ieee80211com *ic = ni->ni_ic; 1299 struct ieee80211_channel *rxchan = ic->ic_curchan; 1300 struct ieee80211_frame *wh; 1301 uint8_t *frm, *efrm; 1302 uint8_t *rates, *xrates, *wme, *htcap, *htinfo; 1303 uint8_t rate; 1304 int ht_state_change = 0; 1305 1306 wh = mtod(m0, struct ieee80211_frame *); 1307 frm = (uint8_t *)&wh[1]; 1308 efrm = mtod(m0, uint8_t *) + m0->m_len; 1309 switch (subtype) { 1310 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1311 case IEEE80211_FC0_SUBTYPE_BEACON: { 1312 struct ieee80211_scanparams scan; 1313 struct ieee80211_channel *c; 1314 /* 1315 * We process beacon/probe response frames: 1316 * o when scanning, or 1317 * o station mode when associated (to collect state 1318 * updates such as 802.11g slot time) 1319 * Frames otherwise received are discarded. 1320 */ 1321 if (!((ic->ic_flags & IEEE80211_F_SCAN) || ni->ni_associd)) { 1322 vap->iv_stats.is_rx_mgtdiscard++; 1323 return; 1324 } 1325 /* Override RX channel as appropriate */ 1326 if (rxs != NULL) { 1327 c = ieee80211_lookup_channel_rxstatus(vap, rxs); 1328 if (c != NULL) 1329 rxchan = c; 1330 } 1331 /* XXX probe response in sta mode when !scanning? */ 1332 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0) { 1333 if (! (ic->ic_flags & IEEE80211_F_SCAN)) 1334 vap->iv_stats.is_beacon_bad++; 1335 return; 1336 } 1337 1338 /* 1339 * Count frame now that we know it's to be processed. 1340 */ 1341 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1342 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1343 IEEE80211_NODE_STAT(ni, rx_beacons); 1344 } else 1345 IEEE80211_NODE_STAT(ni, rx_proberesp); 1346 /* 1347 * When operating in station mode, check for state updates. 1348 * Be careful to ignore beacons received while doing a 1349 * background scan. We consider only 11g/WMM stuff right now. 1350 */ 1351 if (ni->ni_associd != 0 && 1352 ((ic->ic_flags & IEEE80211_F_SCAN) == 0 || 1353 IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_bssid))) { 1354 /* record tsf of last beacon */ 1355 memcpy(ni->ni_tstamp.data, scan.tstamp, 1356 sizeof(ni->ni_tstamp)); 1357 /* count beacon frame for s/w bmiss handling */ 1358 vap->iv_swbmiss_count++; 1359 vap->iv_bmiss_count = 0; 1360 if (ni->ni_erp != scan.erp) { 1361 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1362 wh->i_addr2, 1363 "erp change: was 0x%x, now 0x%x", 1364 ni->ni_erp, scan.erp); 1365 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1366 (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) 1367 ic->ic_flags |= IEEE80211_F_USEPROT; 1368 else 1369 ic->ic_flags &= ~IEEE80211_F_USEPROT; 1370 ni->ni_erp = scan.erp; 1371 /* XXX statistic */ 1372 /* XXX driver notification */ 1373 } 1374 if ((ni->ni_capinfo ^ scan.capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME) { 1375 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1376 wh->i_addr2, 1377 "capabilities change: was 0x%x, now 0x%x", 1378 ni->ni_capinfo, scan.capinfo); 1379 /* 1380 * NB: we assume short preamble doesn't 1381 * change dynamically 1382 */ 1383 ieee80211_set_shortslottime(ic, 1384 IEEE80211_IS_CHAN_A(ic->ic_bsschan) || 1385 (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1386 ni->ni_capinfo = (ni->ni_capinfo &~ IEEE80211_CAPINFO_SHORT_SLOTTIME) 1387 | (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME); 1388 /* XXX statistic */ 1389 } 1390 if (scan.wme != NULL && 1391 (ni->ni_flags & IEEE80211_NODE_QOS) && 1392 ieee80211_parse_wmeparams(vap, scan.wme, wh) > 0) 1393 ieee80211_wme_updateparams(vap); 1394 #ifdef IEEE80211_SUPPORT_SUPERG 1395 if (scan.ath != NULL) 1396 ieee80211_parse_athparams(ni, scan.ath, wh); 1397 #endif 1398 if (scan.htcap != NULL && scan.htinfo != NULL && 1399 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1400 /* XXX state changes? */ 1401 if (ieee80211_ht_updateparams(ni, 1402 scan.htcap, scan.htinfo)) 1403 ht_state_change = 1; 1404 } 1405 if (scan.quiet) 1406 ic->ic_set_quiet(ni, scan.quiet); 1407 1408 if (scan.tim != NULL) { 1409 struct ieee80211_tim_ie *tim = 1410 (struct ieee80211_tim_ie *) scan.tim; 1411 /* 1412 * XXX Check/debug this code; see if it's about 1413 * the right time to force the VAP awake if we 1414 * receive a frame destined for us? 1415 */ 1416 int aid = IEEE80211_AID(ni->ni_associd); 1417 int ix = aid / NBBY; 1418 int min = tim->tim_bitctl &~ 1; 1419 int max = tim->tim_len + min - 4; 1420 int tim_ucast = 0, tim_mcast = 0; 1421 1422 /* 1423 * Only do this for unicast traffic in the TIM 1424 * The multicast traffic notification for 1425 * the scan notification stuff should occur 1426 * differently. 1427 */ 1428 if (min <= ix && ix <= max && 1429 isset(tim->tim_bitmap - min, aid)) { 1430 tim_ucast = 1; 1431 } 1432 1433 /* 1434 * Do a separate notification 1435 * for the multicast bit being set. 1436 */ 1437 if (tim->tim_bitctl & 1) { 1438 tim_mcast = 1; 1439 } 1440 1441 /* 1442 * If the TIM indicates there's traffic for 1443 * us then get us out of STA mode powersave. 1444 */ 1445 if (tim_ucast == 1) { 1446 1447 /* 1448 * Wake us out of SLEEP state if we're 1449 * in it; and if we're doing bgscan 1450 * then wake us out of STA powersave. 1451 */ 1452 ieee80211_sta_tim_notify(vap, 1); 1453 1454 /* 1455 * This is preventing us from 1456 * continuing a bgscan; because it 1457 * tricks the contbgscan() 1458 * routine to think there's always 1459 * traffic for us. 1460 * 1461 * I think we need both an RX and 1462 * TX ic_lastdata field. 1463 */ 1464 ic->ic_lastdata = ticks; 1465 } 1466 1467 ni->ni_dtim_count = tim->tim_count; 1468 ni->ni_dtim_period = tim->tim_period; 1469 } 1470 if (scan.csa != NULL && 1471 (vap->iv_flags & IEEE80211_F_DOTH)) 1472 ieee80211_parse_csaparams(vap, scan.csa, wh); 1473 else if (ic->ic_flags & IEEE80211_F_CSAPENDING) { 1474 /* 1475 * No CSA ie or 11h disabled, but a channel 1476 * switch is pending; drop out so we aren't 1477 * stuck in CSA state. If the AP really is 1478 * moving we'll get a beacon miss and scan. 1479 */ 1480 IEEE80211_LOCK(ic); 1481 ieee80211_csa_cancelswitch(ic); 1482 IEEE80211_UNLOCK(ic); 1483 } 1484 /* 1485 * If scanning, pass the info to the scan module. 1486 * Otherwise, check if it's the right time to do 1487 * a background scan. Background scanning must 1488 * be enabled and we must not be operating in the 1489 * turbo phase of dynamic turbo mode. Then, 1490 * it's been a while since the last background 1491 * scan and if no data frames have come through 1492 * recently, kick off a scan. Note that this 1493 * is the mechanism by which a background scan 1494 * is started _and_ continued each time we 1495 * return on-channel to receive a beacon from 1496 * our ap. 1497 */ 1498 if (ic->ic_flags & IEEE80211_F_SCAN) { 1499 ieee80211_add_scan(vap, rxchan, 1500 &scan, wh, subtype, rssi, nf); 1501 } else if (contbgscan(vap)) { 1502 ieee80211_bg_scan(vap, 0); 1503 } else if (startbgscan(vap)) { 1504 vap->iv_stats.is_scan_bg++; 1505 #if 0 1506 /* wakeup if we are sleeing */ 1507 ieee80211_set_pwrsave(vap, 0); 1508 #endif 1509 ieee80211_bg_scan(vap, 0); 1510 } 1511 1512 /* 1513 * Put the station to sleep if we haven't seen 1514 * traffic in a while. 1515 */ 1516 IEEE80211_LOCK(ic); 1517 ieee80211_sta_ps_timer_check(vap); 1518 IEEE80211_UNLOCK(ic); 1519 1520 /* 1521 * If we've had a channel width change (eg HT20<->HT40) 1522 * then schedule a delayed driver notification. 1523 */ 1524 if (ht_state_change) 1525 ieee80211_update_chw(ic); 1526 return; 1527 } 1528 /* 1529 * If scanning, just pass information to the scan module. 1530 */ 1531 if (ic->ic_flags & IEEE80211_F_SCAN) { 1532 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1533 /* 1534 * Actively scanning a channel marked passive; 1535 * send a probe request now that we know there 1536 * is 802.11 traffic present. 1537 * 1538 * XXX check if the beacon we recv'd gives 1539 * us what we need and suppress the probe req 1540 */ 1541 ieee80211_probe_curchan(vap, 1); 1542 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1543 } 1544 ieee80211_add_scan(vap, rxchan, &scan, wh, 1545 subtype, rssi, nf); 1546 return; 1547 } 1548 break; 1549 } 1550 1551 case IEEE80211_FC0_SUBTYPE_AUTH: { 1552 uint16_t algo, seq, status; 1553 /* 1554 * auth frame format 1555 * [2] algorithm 1556 * [2] sequence 1557 * [2] status 1558 * [tlv*] challenge 1559 */ 1560 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1561 algo = le16toh(*(uint16_t *)frm); 1562 seq = le16toh(*(uint16_t *)(frm + 2)); 1563 status = le16toh(*(uint16_t *)(frm + 4)); 1564 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2, 1565 "recv auth frame with algorithm %d seq %d", algo, seq); 1566 1567 if (vap->iv_flags & IEEE80211_F_COUNTERM) { 1568 IEEE80211_DISCARD(vap, 1569 IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO, 1570 wh, "auth", "%s", "TKIP countermeasures enabled"); 1571 vap->iv_stats.is_rx_auth_countermeasures++; 1572 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 1573 ieee80211_send_error(ni, wh->i_addr2, 1574 IEEE80211_FC0_SUBTYPE_AUTH, 1575 IEEE80211_REASON_MIC_FAILURE); 1576 } 1577 return; 1578 } 1579 if (algo == IEEE80211_AUTH_ALG_SHARED) 1580 sta_auth_shared(ni, wh, frm + 6, efrm, rssi, nf, 1581 seq, status); 1582 else if (algo == IEEE80211_AUTH_ALG_OPEN) 1583 sta_auth_open(ni, wh, rssi, nf, seq, status); 1584 else { 1585 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1586 wh, "auth", "unsupported alg %d", algo); 1587 vap->iv_stats.is_rx_auth_unsupported++; 1588 return; 1589 } 1590 break; 1591 } 1592 1593 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 1594 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: { 1595 uint16_t capinfo, associd; 1596 uint16_t status; 1597 1598 if (vap->iv_state != IEEE80211_S_ASSOC) { 1599 vap->iv_stats.is_rx_mgtdiscard++; 1600 return; 1601 } 1602 1603 /* 1604 * asresp frame format 1605 * [2] capability information 1606 * [2] status 1607 * [2] association ID 1608 * [tlv] supported rates 1609 * [tlv] extended supported rates 1610 * [tlv] WME 1611 * [tlv] HT capabilities 1612 * [tlv] HT info 1613 */ 1614 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1615 ni = vap->iv_bss; 1616 capinfo = le16toh(*(uint16_t *)frm); 1617 frm += 2; 1618 status = le16toh(*(uint16_t *)frm); 1619 frm += 2; 1620 if (status != 0) { 1621 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1622 wh->i_addr2, "%sassoc failed (reason %d)", 1623 ISREASSOC(subtype) ? "re" : "", status); 1624 vap->iv_stats.is_rx_auth_fail++; /* XXX */ 1625 return; 1626 } 1627 associd = le16toh(*(uint16_t *)frm); 1628 frm += 2; 1629 1630 rates = xrates = wme = htcap = htinfo = NULL; 1631 while (efrm - frm > 1) { 1632 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1633 switch (*frm) { 1634 case IEEE80211_ELEMID_RATES: 1635 rates = frm; 1636 break; 1637 case IEEE80211_ELEMID_XRATES: 1638 xrates = frm; 1639 break; 1640 case IEEE80211_ELEMID_HTCAP: 1641 htcap = frm; 1642 break; 1643 case IEEE80211_ELEMID_HTINFO: 1644 htinfo = frm; 1645 break; 1646 case IEEE80211_ELEMID_VENDOR: 1647 if (iswmeoui(frm)) 1648 wme = frm; 1649 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) { 1650 /* 1651 * Accept pre-draft HT ie's if the 1652 * standard ones have not been seen. 1653 */ 1654 if (ishtcapoui(frm)) { 1655 if (htcap == NULL) 1656 htcap = frm; 1657 } else if (ishtinfooui(frm)) { 1658 if (htinfo == NULL) 1659 htinfo = frm; 1660 } 1661 } 1662 /* XXX Atheros OUI support */ 1663 break; 1664 } 1665 frm += frm[1] + 2; 1666 } 1667 1668 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1669 if (xrates != NULL) 1670 IEEE80211_VERIFY_ELEMENT(xrates, 1671 IEEE80211_RATE_MAXSIZE - rates[1], return); 1672 rate = ieee80211_setup_rates(ni, rates, xrates, 1673 IEEE80211_F_JOIN | 1674 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1675 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1676 if (rate & IEEE80211_RATE_BASIC) { 1677 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1678 wh->i_addr2, 1679 "%sassoc failed (rate set mismatch)", 1680 ISREASSOC(subtype) ? "re" : ""); 1681 vap->iv_stats.is_rx_assoc_norate++; 1682 ieee80211_new_state(vap, IEEE80211_S_SCAN, 1683 IEEE80211_SCAN_FAIL_STATUS); 1684 return; 1685 } 1686 1687 ni->ni_capinfo = capinfo; 1688 ni->ni_associd = associd; 1689 if (ni->ni_jointime == 0) 1690 ni->ni_jointime = time_uptime; 1691 if (wme != NULL && 1692 ieee80211_parse_wmeparams(vap, wme, wh) >= 0) { 1693 ni->ni_flags |= IEEE80211_NODE_QOS; 1694 ieee80211_wme_updateparams(vap); 1695 } else 1696 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1697 /* 1698 * Setup HT state according to the negotiation. 1699 * 1700 * NB: shouldn't need to check if HT use is enabled but some 1701 * ap's send back HT ie's even when we don't indicate we 1702 * are HT capable in our AssocReq. 1703 */ 1704 if (htcap != NULL && htinfo != NULL && 1705 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1706 ieee80211_ht_node_init(ni); 1707 ieee80211_ht_updateparams(ni, htcap, htinfo); 1708 ieee80211_setup_htrates(ni, htcap, 1709 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1710 ieee80211_setup_basic_htrates(ni, htinfo); 1711 ieee80211_node_setuptxparms(ni); 1712 ieee80211_ratectl_node_init(ni); 1713 } else { 1714 #ifdef IEEE80211_SUPPORT_SUPERG 1715 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_ATH)) 1716 ieee80211_ff_node_init(ni); 1717 #endif 1718 } 1719 /* 1720 * Configure state now that we are associated. 1721 * 1722 * XXX may need different/additional driver callbacks? 1723 */ 1724 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) || 1725 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1726 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 1727 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 1728 } else { 1729 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 1730 ic->ic_flags |= IEEE80211_F_USEBARKER; 1731 } 1732 ieee80211_set_shortslottime(ic, 1733 IEEE80211_IS_CHAN_A(ic->ic_curchan) || 1734 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1735 /* 1736 * Honor ERP protection. 1737 * 1738 * NB: ni_erp should zero for non-11g operation. 1739 */ 1740 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1741 (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) 1742 ic->ic_flags |= IEEE80211_F_USEPROT; 1743 else 1744 ic->ic_flags &= ~IEEE80211_F_USEPROT; 1745 IEEE80211_NOTE_MAC(vap, 1746 IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, wh->i_addr2, 1747 "%sassoc success at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 1748 ISREASSOC(subtype) ? "re" : "", 1749 IEEE80211_NODE_AID(ni), 1750 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 1751 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 1752 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "", 1753 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 1754 ni->ni_flags & IEEE80211_NODE_HT ? 1755 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 1756 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 1757 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 1758 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 1759 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 1760 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 1761 ", fast-frames" : "", 1762 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 1763 ", turbo" : "" 1764 ); 1765 ieee80211_new_state(vap, IEEE80211_S_RUN, subtype); 1766 break; 1767 } 1768 1769 case IEEE80211_FC0_SUBTYPE_DEAUTH: { 1770 uint16_t reason; 1771 1772 if (vap->iv_state == IEEE80211_S_SCAN) { 1773 vap->iv_stats.is_rx_mgtdiscard++; 1774 return; 1775 } 1776 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 1777 /* NB: can happen when in promiscuous mode */ 1778 vap->iv_stats.is_rx_mgtdiscard++; 1779 break; 1780 } 1781 1782 /* 1783 * deauth frame format 1784 * [2] reason 1785 */ 1786 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 1787 reason = le16toh(*(uint16_t *)frm); 1788 1789 vap->iv_stats.is_rx_deauth++; 1790 vap->iv_stats.is_rx_deauth_code = reason; 1791 IEEE80211_NODE_STAT(ni, rx_deauth); 1792 1793 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 1794 "recv deauthenticate (reason %d)", reason); 1795 ieee80211_new_state(vap, IEEE80211_S_AUTH, 1796 (reason << 8) | IEEE80211_FC0_SUBTYPE_DEAUTH); 1797 break; 1798 } 1799 1800 case IEEE80211_FC0_SUBTYPE_DISASSOC: { 1801 uint16_t reason; 1802 1803 if (vap->iv_state != IEEE80211_S_RUN && 1804 vap->iv_state != IEEE80211_S_ASSOC && 1805 vap->iv_state != IEEE80211_S_AUTH) { 1806 vap->iv_stats.is_rx_mgtdiscard++; 1807 return; 1808 } 1809 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 1810 /* NB: can happen when in promiscuous mode */ 1811 vap->iv_stats.is_rx_mgtdiscard++; 1812 break; 1813 } 1814 1815 /* 1816 * disassoc frame format 1817 * [2] reason 1818 */ 1819 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 1820 reason = le16toh(*(uint16_t *)frm); 1821 1822 vap->iv_stats.is_rx_disassoc++; 1823 vap->iv_stats.is_rx_disassoc_code = reason; 1824 IEEE80211_NODE_STAT(ni, rx_disassoc); 1825 1826 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 1827 "recv disassociate (reason %d)", reason); 1828 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 1829 break; 1830 } 1831 1832 case IEEE80211_FC0_SUBTYPE_ACTION: 1833 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 1834 if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 1835 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1836 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1837 wh, NULL, "%s", "not for us"); 1838 vap->iv_stats.is_rx_mgtdiscard++; 1839 } else if (vap->iv_state != IEEE80211_S_RUN) { 1840 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1841 wh, NULL, "wrong state %s", 1842 ieee80211_state_name[vap->iv_state]); 1843 vap->iv_stats.is_rx_mgtdiscard++; 1844 } else { 1845 if (ieee80211_parse_action(ni, m0) == 0) 1846 (void)ic->ic_recv_action(ni, wh, frm, efrm); 1847 } 1848 break; 1849 1850 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1851 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 1852 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1853 case IEEE80211_FC0_SUBTYPE_ATIM: 1854 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1855 wh, NULL, "%s", "not handled"); 1856 vap->iv_stats.is_rx_mgtdiscard++; 1857 break; 1858 1859 default: 1860 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1861 wh, "mgt", "subtype 0x%x not handled", subtype); 1862 vap->iv_stats.is_rx_badsubtype++; 1863 break; 1864 } 1865 #undef ISREASSOC 1866 #undef ISPROBE 1867 } 1868 1869 static void 1870 sta_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 1871 { 1872 switch (subtype) { 1873 case IEEE80211_FC0_SUBTYPE_BAR: 1874 ieee80211_recv_bar(ni, m); 1875 break; 1876 } 1877 } 1878