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 static void 210 sta_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 */ 231 static int 232 sta_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 kprintf(" 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 */ 478 static __inline int 479 isdstods_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 */ 499 static __inline int 500 isfromds_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 */ 515 static __inline int 516 doprint(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 */ 537 static int 538 sta_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 #if defined(__DragonFly__) 628 bssid, NULL, "not to cur sta: lladdr=%s, addr1=%s", 629 ether_sprintf(IF_LLADDR(ifp)), 630 ether_sprintf(wh->i_addr1)); 631 #else 632 bssid, NULL, "not to cur sta: lladdr=%6D, addr1=%6D", 633 IF_LLADDR(ifp), ":", wh->i_addr1, ":"); 634 #endif 635 vap->iv_stats.is_rx_wrongbss++; 636 goto out; 637 } 638 639 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 640 ni->ni_noise = nf; 641 if ( IEEE80211_HAS_SEQ(type, subtype) && 642 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 643 uint8_t tid = ieee80211_gettid(wh); 644 if (IEEE80211_QOS_HAS_SEQ(wh) && 645 TID_TO_WME_AC(tid) >= WME_AC_VI) 646 ic->ic_wme.wme_hipri_traffic++; 647 if (! ieee80211_check_rxseq(ni, wh, bssid)) 648 goto out; 649 } 650 } 651 652 switch (type) { 653 case IEEE80211_FC0_TYPE_DATA: 654 hdrspace = ieee80211_hdrspace(ic, wh); 655 if (m->m_len < hdrspace && 656 (m = m_pullup(m, hdrspace)) == NULL) { 657 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 658 ni->ni_macaddr, NULL, 659 "data too short: expecting %u", hdrspace); 660 vap->iv_stats.is_rx_tooshort++; 661 goto out; /* XXX */ 662 } 663 /* 664 * Handle A-MPDU re-ordering. If the frame is to be 665 * processed directly then ieee80211_ampdu_reorder 666 * will return 0; otherwise it has consumed the mbuf 667 * and we should do nothing more with it. 668 */ 669 if ((m->m_flags & M_AMPDU) && 670 (dir == IEEE80211_FC1_DIR_FROMDS || 671 dir == IEEE80211_FC1_DIR_DSTODS) && 672 ieee80211_ampdu_reorder(ni, m) != 0) { 673 m = NULL; 674 goto out; 675 } 676 resubmit_ampdu: 677 if (dir == IEEE80211_FC1_DIR_FROMDS) { 678 if ((ifp->if_flags & IFF_SIMPLEX) && 679 isfromds_mcastecho(vap, wh)) { 680 /* 681 * In IEEE802.11 network, multicast 682 * packets sent from "me" are broadcast 683 * from the AP; silently discard for 684 * SIMPLEX interface. 685 */ 686 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 687 wh, "data", "%s", "multicast echo"); 688 vap->iv_stats.is_rx_mcastecho++; 689 goto out; 690 } 691 if ((vap->iv_flags & IEEE80211_F_DWDS) && 692 IEEE80211_IS_MULTICAST(wh->i_addr1)) { 693 /* 694 * DWDS sta's must drop 3-address mcast frames 695 * as they will be sent separately as a 4-addr 696 * frame. Accepting the 3-addr frame will 697 * confuse the bridge into thinking the sending 698 * sta is located at the end of WDS link. 699 */ 700 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 701 "3-address data", "%s", "DWDS enabled"); 702 vap->iv_stats.is_rx_mcastecho++; 703 goto out; 704 } 705 } else if (dir == IEEE80211_FC1_DIR_DSTODS) { 706 if ((vap->iv_flags & IEEE80211_F_DWDS) == 0) { 707 IEEE80211_DISCARD(vap, 708 IEEE80211_MSG_INPUT, wh, "4-address data", 709 "%s", "DWDS not enabled"); 710 vap->iv_stats.is_rx_wrongdir++; 711 goto out; 712 } 713 if ((ifp->if_flags & IFF_SIMPLEX) && 714 isdstods_mcastecho(vap, wh)) { 715 /* 716 * In IEEE802.11 network, multicast 717 * packets sent from "me" are broadcast 718 * from the AP; silently discard for 719 * SIMPLEX interface. 720 */ 721 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 722 "4-address data", "%s", "multicast echo"); 723 vap->iv_stats.is_rx_mcastecho++; 724 goto out; 725 } 726 } else { 727 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 728 "data", "incorrect dir 0x%x", dir); 729 vap->iv_stats.is_rx_wrongdir++; 730 goto out; 731 } 732 733 /* 734 * Handle privacy requirements. Note that we 735 * must not be preempted from here until after 736 * we (potentially) call ieee80211_crypto_demic; 737 * otherwise we may violate assumptions in the 738 * crypto cipher modules used to do delayed update 739 * of replay sequence numbers. 740 */ 741 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 742 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 743 /* 744 * Discard encrypted frames when privacy is off. 745 */ 746 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 747 wh, "WEP", "%s", "PRIVACY off"); 748 vap->iv_stats.is_rx_noprivacy++; 749 IEEE80211_NODE_STAT(ni, rx_noprivacy); 750 goto out; 751 } 752 key = ieee80211_crypto_decap(ni, m, hdrspace); 753 if (key == NULL) { 754 /* NB: stats+msgs handled in crypto_decap */ 755 IEEE80211_NODE_STAT(ni, rx_wepfail); 756 goto out; 757 } 758 wh = mtod(m, struct ieee80211_frame *); 759 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 760 } else { 761 /* XXX M_WEP and IEEE80211_F_PRIVACY */ 762 key = NULL; 763 } 764 765 /* 766 * Save QoS bits for use below--before we strip the header. 767 */ 768 if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { 769 qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? 770 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : 771 ((struct ieee80211_qosframe *)wh)->i_qos[0]; 772 } else 773 qos = 0; 774 775 /* 776 * Next up, any fragmentation. 777 */ 778 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 779 m = ieee80211_defrag(ni, m, hdrspace); 780 if (m == NULL) { 781 /* Fragment dropped or frame not complete yet */ 782 goto out; 783 } 784 } 785 wh = NULL; /* no longer valid, catch any uses */ 786 787 /* 788 * Next strip any MSDU crypto bits. 789 */ 790 if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) { 791 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 792 ni->ni_macaddr, "data", "%s", "demic error"); 793 vap->iv_stats.is_rx_demicfail++; 794 IEEE80211_NODE_STAT(ni, rx_demicfail); 795 goto out; 796 } 797 798 /* copy to listener after decrypt */ 799 if (ieee80211_radiotap_active_vap(vap)) 800 ieee80211_radiotap_rx(vap, m); 801 need_tap = 0; 802 803 /* 804 * Finally, strip the 802.11 header. 805 */ 806 m = ieee80211_decap(vap, m, hdrspace); 807 if (m == NULL) { 808 /* XXX mask bit to check for both */ 809 /* don't count Null data frames as errors */ 810 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 811 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 812 goto out; 813 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 814 ni->ni_macaddr, "data", "%s", "decap error"); 815 vap->iv_stats.is_rx_decap++; 816 IEEE80211_NODE_STAT(ni, rx_decap); 817 goto err; 818 } 819 eh = mtod(m, struct ether_header *); 820 if (!ieee80211_node_is_authorized(ni)) { 821 /* 822 * Deny any non-PAE frames received prior to 823 * authorization. For open/shared-key 824 * authentication the port is mark authorized 825 * after authentication completes. For 802.1x 826 * the port is not marked authorized by the 827 * authenticator until the handshake has completed. 828 */ 829 if (eh->ether_type != htons(ETHERTYPE_PAE)) { 830 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 831 eh->ether_shost, "data", 832 "unauthorized port: ether type 0x%x len %u", 833 eh->ether_type, m->m_pkthdr.len); 834 vap->iv_stats.is_rx_unauth++; 835 IEEE80211_NODE_STAT(ni, rx_unauth); 836 goto err; 837 } 838 } else { 839 /* 840 * When denying unencrypted frames, discard 841 * any non-PAE frames received without encryption. 842 */ 843 if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && 844 (key == NULL && (m->m_flags & M_WEP) == 0) && 845 eh->ether_type != htons(ETHERTYPE_PAE)) { 846 /* 847 * Drop unencrypted frames. 848 */ 849 vap->iv_stats.is_rx_unencrypted++; 850 IEEE80211_NODE_STAT(ni, rx_unencrypted); 851 goto out; 852 } 853 } 854 /* XXX require HT? */ 855 if (qos & IEEE80211_QOS_AMSDU) { 856 m = ieee80211_decap_amsdu(ni, m); 857 if (m == NULL) 858 return IEEE80211_FC0_TYPE_DATA; 859 } else { 860 #ifdef IEEE80211_SUPPORT_SUPERG 861 m = ieee80211_decap_fastframe(vap, ni, m); 862 if (m == NULL) 863 return IEEE80211_FC0_TYPE_DATA; 864 #endif 865 } 866 ieee80211_deliver_data(vap, ni, m); 867 return IEEE80211_FC0_TYPE_DATA; 868 869 case IEEE80211_FC0_TYPE_MGT: 870 vap->iv_stats.is_rx_mgmt++; 871 IEEE80211_NODE_STAT(ni, rx_mgmt); 872 if (dir != IEEE80211_FC1_DIR_NODS) { 873 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 874 wh, "data", "incorrect dir 0x%x", dir); 875 vap->iv_stats.is_rx_wrongdir++; 876 goto err; 877 } 878 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 879 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 880 ni->ni_macaddr, "mgt", "too short: len %u", 881 m->m_pkthdr.len); 882 vap->iv_stats.is_rx_tooshort++; 883 goto out; 884 } 885 #ifdef IEEE80211_DEBUG 886 if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) || 887 ieee80211_msg_dumppkts(vap)) { 888 if_printf(ifp, "received %s from %s rssi %d\n", 889 ieee80211_mgt_subtype_name(subtype), 890 ether_sprintf(wh->i_addr2), rssi); 891 } 892 #endif 893 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 894 if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) { 895 /* 896 * Only shared key auth frames with a challenge 897 * should be encrypted, discard all others. 898 */ 899 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 900 wh, ieee80211_mgt_subtype_name(subtype), 901 "%s", "WEP set but not permitted"); 902 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 903 goto out; 904 } 905 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 906 /* 907 * Discard encrypted frames when privacy is off. 908 */ 909 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 910 wh, "mgt", "%s", "WEP set but PRIVACY off"); 911 vap->iv_stats.is_rx_noprivacy++; 912 goto out; 913 } 914 hdrspace = ieee80211_hdrspace(ic, wh); 915 key = ieee80211_crypto_decap(ni, m, hdrspace); 916 if (key == NULL) { 917 /* NB: stats+msgs handled in crypto_decap */ 918 goto out; 919 } 920 wh = mtod(m, struct ieee80211_frame *); 921 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 922 } 923 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); 924 goto out; 925 926 case IEEE80211_FC0_TYPE_CTL: 927 vap->iv_stats.is_rx_ctl++; 928 IEEE80211_NODE_STAT(ni, rx_ctrl); 929 vap->iv_recv_ctl(ni, m, subtype); 930 goto out; 931 932 default: 933 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 934 wh, NULL, "bad frame type 0x%x", type); 935 /* should not come here */ 936 break; 937 } 938 err: 939 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 940 out: 941 if (m != NULL) { 942 if (need_tap && ieee80211_radiotap_active_vap(vap)) 943 ieee80211_radiotap_rx(vap, m); 944 m_freem(m); 945 } 946 return type; 947 } 948 949 static void 950 sta_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh, 951 int rssi, int nf, uint16_t seq, uint16_t status) 952 { 953 struct ieee80211vap *vap = ni->ni_vap; 954 955 if (ni->ni_authmode == IEEE80211_AUTH_SHARED) { 956 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 957 ni->ni_macaddr, "open auth", 958 "bad sta auth mode %u", ni->ni_authmode); 959 vap->iv_stats.is_rx_bad_auth++; /* XXX */ 960 return; 961 } 962 if (vap->iv_state != IEEE80211_S_AUTH || 963 seq != IEEE80211_AUTH_OPEN_RESPONSE) { 964 vap->iv_stats.is_rx_bad_auth++; 965 return; 966 } 967 if (status != 0) { 968 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 969 ni, "open auth failed (reason %d)", status); 970 vap->iv_stats.is_rx_auth_fail++; 971 vap->iv_stats.is_rx_authfail_code = status; 972 ieee80211_new_state(vap, IEEE80211_S_SCAN, 973 IEEE80211_SCAN_FAIL_STATUS); 974 } else 975 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 976 } 977 978 static void 979 sta_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh, 980 uint8_t *frm, uint8_t *efrm, int rssi, int nf, 981 uint16_t seq, uint16_t status) 982 { 983 struct ieee80211vap *vap = ni->ni_vap; 984 uint8_t *challenge; 985 int estatus; 986 987 /* 988 * NB: this can happen as we allow pre-shared key 989 * authentication to be enabled w/o wep being turned 990 * on so that configuration of these can be done 991 * in any order. It may be better to enforce the 992 * ordering in which case this check would just be 993 * for sanity/consistency. 994 */ 995 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 996 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 997 ni->ni_macaddr, "shared key auth", 998 "%s", " PRIVACY is disabled"); 999 estatus = IEEE80211_STATUS_ALG; 1000 goto bad; 1001 } 1002 /* 1003 * Pre-shared key authentication is evil; accept 1004 * it only if explicitly configured (it is supported 1005 * mainly for compatibility with clients like OS X). 1006 */ 1007 if (ni->ni_authmode != IEEE80211_AUTH_AUTO && 1008 ni->ni_authmode != IEEE80211_AUTH_SHARED) { 1009 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1010 ni->ni_macaddr, "shared key auth", 1011 "bad sta auth mode %u", ni->ni_authmode); 1012 vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */ 1013 estatus = IEEE80211_STATUS_ALG; 1014 goto bad; 1015 } 1016 1017 challenge = NULL; 1018 if (frm + 1 < efrm) { 1019 if ((frm[1] + 2) > (efrm - frm)) { 1020 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1021 ni->ni_macaddr, "shared key auth", 1022 "ie %d/%ld too long", 1023 frm[0], (frm[1] + 2) - (efrm - frm)); 1024 vap->iv_stats.is_rx_bad_auth++; 1025 estatus = IEEE80211_STATUS_CHALLENGE; 1026 goto bad; 1027 } 1028 if (*frm == IEEE80211_ELEMID_CHALLENGE) 1029 challenge = frm; 1030 frm += frm[1] + 2; 1031 } 1032 switch (seq) { 1033 case IEEE80211_AUTH_SHARED_CHALLENGE: 1034 case IEEE80211_AUTH_SHARED_RESPONSE: 1035 if (challenge == NULL) { 1036 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1037 ni->ni_macaddr, "shared key auth", 1038 "%s", "no challenge"); 1039 vap->iv_stats.is_rx_bad_auth++; 1040 estatus = IEEE80211_STATUS_CHALLENGE; 1041 goto bad; 1042 } 1043 if (challenge[1] != IEEE80211_CHALLENGE_LEN) { 1044 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1045 ni->ni_macaddr, "shared key auth", 1046 "bad challenge len %d", challenge[1]); 1047 vap->iv_stats.is_rx_bad_auth++; 1048 estatus = IEEE80211_STATUS_CHALLENGE; 1049 goto bad; 1050 } 1051 default: 1052 break; 1053 } 1054 if (vap->iv_state != IEEE80211_S_AUTH) 1055 return; 1056 switch (seq) { 1057 case IEEE80211_AUTH_SHARED_PASS: 1058 if (ni->ni_challenge != NULL) { 1059 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 1060 ni->ni_challenge = NULL; 1061 } 1062 if (status != 0) { 1063 IEEE80211_NOTE_FRAME(vap, 1064 IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, wh, 1065 "shared key auth failed (reason %d)", status); 1066 vap->iv_stats.is_rx_auth_fail++; 1067 vap->iv_stats.is_rx_authfail_code = status; 1068 return; 1069 } 1070 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 1071 break; 1072 case IEEE80211_AUTH_SHARED_CHALLENGE: 1073 if (!ieee80211_alloc_challenge(ni)) 1074 return; 1075 /* XXX could optimize by passing recvd challenge */ 1076 memcpy(ni->ni_challenge, &challenge[2], challenge[1]); 1077 IEEE80211_SEND_MGMT(ni, 1078 IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 1079 break; 1080 default: 1081 IEEE80211_DISCARD(vap, IEEE80211_MSG_AUTH, 1082 wh, "shared key auth", "bad seq %d", seq); 1083 vap->iv_stats.is_rx_bad_auth++; 1084 return; 1085 } 1086 return; 1087 bad: 1088 /* 1089 * Kick the state machine. This short-circuits 1090 * using the mgt frame timeout to trigger the 1091 * state transition. 1092 */ 1093 if (vap->iv_state == IEEE80211_S_AUTH) 1094 ieee80211_new_state(vap, IEEE80211_S_SCAN, 1095 IEEE80211_SCAN_FAIL_STATUS); 1096 } 1097 1098 int 1099 ieee80211_parse_wmeparams(struct ieee80211vap *vap, uint8_t *frm, 1100 const struct ieee80211_frame *wh) 1101 { 1102 #define MS(_v, _f) (((_v) & _f) >> _f##_S) 1103 struct ieee80211_wme_state *wme = &vap->iv_ic->ic_wme; 1104 u_int len = frm[1], qosinfo; 1105 int i; 1106 1107 if (len < sizeof(struct ieee80211_wme_param)-2) { 1108 IEEE80211_DISCARD_IE(vap, 1109 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WME, 1110 wh, "WME", "too short, len %u", len); 1111 return -1; 1112 } 1113 qosinfo = frm[__offsetof(struct ieee80211_wme_param, param_qosInfo)]; 1114 qosinfo &= WME_QOSINFO_COUNT; 1115 /* XXX do proper check for wraparound */ 1116 if (qosinfo == wme->wme_wmeChanParams.cap_info) 1117 return 0; 1118 frm += __offsetof(struct ieee80211_wme_param, params_acParams); 1119 for (i = 0; i < WME_NUM_AC; i++) { 1120 struct wmeParams *wmep = 1121 &wme->wme_wmeChanParams.cap_wmeParams[i]; 1122 /* NB: ACI not used */ 1123 wmep->wmep_acm = MS(frm[0], WME_PARAM_ACM); 1124 wmep->wmep_aifsn = MS(frm[0], WME_PARAM_AIFSN); 1125 wmep->wmep_logcwmin = MS(frm[1], WME_PARAM_LOGCWMIN); 1126 wmep->wmep_logcwmax = MS(frm[1], WME_PARAM_LOGCWMAX); 1127 wmep->wmep_txopLimit = le16dec(frm+2); 1128 frm += 4; 1129 } 1130 wme->wme_wmeChanParams.cap_info = qosinfo; 1131 return 1; 1132 #undef MS 1133 } 1134 1135 /* 1136 * Process 11h Channel Switch Announcement (CSA) ie. If this 1137 * is the first CSA then initiate the switch. Otherwise we 1138 * track state and trigger completion and/or cancel of the switch. 1139 * XXX should be public for IBSS use 1140 */ 1141 static void 1142 ieee80211_parse_csaparams(struct ieee80211vap *vap, uint8_t *frm, 1143 const struct ieee80211_frame *wh) 1144 { 1145 struct ieee80211com *ic = vap->iv_ic; 1146 const struct ieee80211_csa_ie *csa = 1147 (const struct ieee80211_csa_ie *) frm; 1148 1149 KASSERT(vap->iv_state >= IEEE80211_S_RUN, 1150 ("state %s", ieee80211_state_name[vap->iv_state])); 1151 1152 if (csa->csa_mode > 1) { 1153 IEEE80211_DISCARD_IE(vap, 1154 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1155 wh, "CSA", "invalid mode %u", csa->csa_mode); 1156 return; 1157 } 1158 IEEE80211_LOCK(ic); 1159 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 1160 /* 1161 * Convert the channel number to a channel reference. We 1162 * try first to preserve turbo attribute of the current 1163 * channel then fallback. Note this will not work if the 1164 * CSA specifies a channel that requires a band switch (e.g. 1165 * 11a => 11g). This is intentional as 11h is defined only 1166 * for 5GHz/11a and because the switch does not involve a 1167 * reassociation, protocol state (capabilities, negotated 1168 * rates, etc) may/will be wrong. 1169 */ 1170 struct ieee80211_channel *c = 1171 ieee80211_find_channel_byieee(ic, csa->csa_newchan, 1172 (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALLTURBO)); 1173 if (c == NULL) { 1174 c = ieee80211_find_channel_byieee(ic, 1175 csa->csa_newchan, 1176 (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALL)); 1177 if (c == NULL) { 1178 IEEE80211_DISCARD_IE(vap, 1179 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1180 wh, "CSA", "invalid channel %u", 1181 csa->csa_newchan); 1182 goto done; 1183 } 1184 } 1185 #if IEEE80211_CSA_COUNT_MIN > 0 1186 if (csa->csa_count < IEEE80211_CSA_COUNT_MIN) { 1187 /* 1188 * Require at least IEEE80211_CSA_COUNT_MIN count to 1189 * reduce the risk of being redirected by a fabricated 1190 * CSA. If a valid CSA is dropped we'll still get a 1191 * beacon miss when the AP leaves the channel so we'll 1192 * eventually follow to the new channel. 1193 * 1194 * NOTE: this violates the 11h spec that states that 1195 * count may be any value and if 0 then a switch 1196 * should happen asap. 1197 */ 1198 IEEE80211_DISCARD_IE(vap, 1199 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1200 wh, "CSA", "count %u too small, must be >= %u", 1201 csa->csa_count, IEEE80211_CSA_COUNT_MIN); 1202 goto done; 1203 } 1204 #endif 1205 ieee80211_csa_startswitch(ic, c, csa->csa_mode, csa->csa_count); 1206 } else { 1207 /* 1208 * Validate this ie against the initial CSA. We require 1209 * mode and channel not change and the count must be 1210 * monotonically decreasing. This may be pointless and 1211 * canceling the switch as a result may be too paranoid but 1212 * in the worst case if we drop out of CSA because of this 1213 * and the AP does move then we'll just end up taking a 1214 * beacon miss and scan to find the AP. 1215 * 1216 * XXX may want <= on count as we also process ProbeResp 1217 * frames and those may come in w/ the same count as the 1218 * previous beacon; but doing so leaves us open to a stuck 1219 * count until we add a dead-man timer 1220 */ 1221 if (!(csa->csa_count < ic->ic_csa_count && 1222 csa->csa_mode == ic->ic_csa_mode && 1223 csa->csa_newchan == ieee80211_chan2ieee(ic, ic->ic_csa_newchan))) { 1224 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_DOTH, wh, 1225 "CSA ie mismatch, initial ie <%d,%d,%d>, " 1226 "this ie <%d,%d,%d>", ic->ic_csa_mode, 1227 ic->ic_csa_newchan->ic_ieee, ic->ic_csa_count, 1228 csa->csa_mode, csa->csa_newchan, csa->csa_count); 1229 ieee80211_csa_cancelswitch(ic); 1230 } else { 1231 if (csa->csa_count <= 1) 1232 ieee80211_csa_completeswitch(ic); 1233 else 1234 ic->ic_csa_count = csa->csa_count; 1235 } 1236 } 1237 done: 1238 IEEE80211_UNLOCK(ic); 1239 } 1240 1241 /* 1242 * Return non-zero if a background scan may be continued: 1243 * o bg scan is active 1244 * o no channel switch is pending 1245 * o there has not been any traffic recently 1246 * o no full-offload scan support (no need for explicitly continuing scan then) 1247 * 1248 * Note we do not check if there is an administrative enable; 1249 * this is only done to start the scan. We assume that any 1250 * change in state will be accompanied by a request to cancel 1251 * active scans which will otherwise cause this test to fail. 1252 */ 1253 static __inline int 1254 contbgscan(struct ieee80211vap *vap) 1255 { 1256 struct ieee80211com *ic = vap->iv_ic; 1257 1258 return ((ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN) && 1259 (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && 1260 !(vap->iv_flags_ext & IEEE80211_FEXT_SCAN_OFFLOAD) && 1261 vap->iv_state == IEEE80211_S_RUN && /* XXX? */ 1262 ieee80211_time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)); 1263 } 1264 1265 /* 1266 * Return non-zero if a backgrond scan may be started: 1267 * o bg scanning is administratively enabled 1268 * o no channel switch is pending 1269 * o we are not boosted on a dynamic turbo channel 1270 * o there has not been a scan recently 1271 * o there has not been any traffic recently (don't check if full-offload scan) 1272 */ 1273 static __inline int 1274 startbgscan(struct ieee80211vap *vap) 1275 { 1276 struct ieee80211com *ic = vap->iv_ic; 1277 1278 return ((vap->iv_flags & IEEE80211_F_BGSCAN) && 1279 (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && 1280 #ifdef IEEE80211_SUPPORT_SUPERG 1281 !IEEE80211_IS_CHAN_DTURBO(ic->ic_curchan) && 1282 #endif 1283 ieee80211_time_after(ticks, ic->ic_lastscan + vap->iv_bgscanintvl) && 1284 ((vap->iv_flags_ext & IEEE80211_FEXT_SCAN_OFFLOAD) || 1285 ieee80211_time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle))); 1286 } 1287 1288 static void 1289 sta_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1290 const struct ieee80211_rx_stats *rxs, 1291 int rssi, int nf) 1292 { 1293 #define ISPROBE(_st) ((_st) == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1294 #define ISREASSOC(_st) ((_st) == IEEE80211_FC0_SUBTYPE_REASSOC_RESP) 1295 struct ieee80211vap *vap = ni->ni_vap; 1296 struct ieee80211com *ic = ni->ni_ic; 1297 struct ieee80211_channel *rxchan = ic->ic_curchan; 1298 struct ieee80211_frame *wh; 1299 uint8_t *frm, *efrm; 1300 uint8_t *rates, *xrates, *wme, *htcap, *htinfo; 1301 uint8_t rate; 1302 int ht_state_change = 0; 1303 1304 wh = mtod(m0, struct ieee80211_frame *); 1305 frm = (uint8_t *)&wh[1]; 1306 efrm = mtod(m0, uint8_t *) + m0->m_len; 1307 switch (subtype) { 1308 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1309 case IEEE80211_FC0_SUBTYPE_BEACON: { 1310 struct ieee80211_scanparams scan; 1311 struct ieee80211_channel *c; 1312 /* 1313 * We process beacon/probe response frames: 1314 * o when scanning, or 1315 * o station mode when associated (to collect state 1316 * updates such as 802.11g slot time) 1317 * Frames otherwise received are discarded. 1318 */ 1319 if (!((ic->ic_flags & IEEE80211_F_SCAN) || ni->ni_associd)) { 1320 vap->iv_stats.is_rx_mgtdiscard++; 1321 return; 1322 } 1323 1324 /* Override RX channel as appropriate */ 1325 if (rxs != NULL) { 1326 c = ieee80211_lookup_channel_rxstatus(vap, rxs); 1327 if (c != NULL) 1328 rxchan = c; 1329 } 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 } 1714 1715 /* 1716 * Always initialise FF/superg state; we can use this 1717 * for doing A-MSDU encapsulation as well. 1718 */ 1719 #ifdef IEEE80211_SUPPORT_SUPERG 1720 ieee80211_ff_node_init(ni); 1721 #endif 1722 1723 /* 1724 * Configure state now that we are associated. 1725 * 1726 * XXX may need different/additional driver callbacks? 1727 */ 1728 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) || 1729 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1730 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 1731 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 1732 } else { 1733 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 1734 ic->ic_flags |= IEEE80211_F_USEBARKER; 1735 } 1736 ieee80211_set_shortslottime(ic, 1737 IEEE80211_IS_CHAN_A(ic->ic_curchan) || 1738 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1739 /* 1740 * Honor ERP protection. 1741 * 1742 * NB: ni_erp should zero for non-11g operation. 1743 */ 1744 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1745 (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) 1746 ic->ic_flags |= IEEE80211_F_USEPROT; 1747 else 1748 ic->ic_flags &= ~IEEE80211_F_USEPROT; 1749 IEEE80211_NOTE_MAC(vap, 1750 IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, wh->i_addr2, 1751 "%sassoc success at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 1752 ISREASSOC(subtype) ? "re" : "", 1753 IEEE80211_NODE_AID(ni), 1754 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 1755 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 1756 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "", 1757 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 1758 ni->ni_flags & IEEE80211_NODE_HT ? 1759 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 1760 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 1761 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 1762 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 1763 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 1764 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 1765 ", fast-frames" : "", 1766 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 1767 ", turbo" : "" 1768 ); 1769 ieee80211_new_state(vap, IEEE80211_S_RUN, subtype); 1770 break; 1771 } 1772 1773 case IEEE80211_FC0_SUBTYPE_DEAUTH: { 1774 uint16_t reason; 1775 1776 if (vap->iv_state == IEEE80211_S_SCAN) { 1777 vap->iv_stats.is_rx_mgtdiscard++; 1778 return; 1779 } 1780 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 1781 /* NB: can happen when in promiscuous mode */ 1782 vap->iv_stats.is_rx_mgtdiscard++; 1783 break; 1784 } 1785 1786 /* 1787 * deauth frame format 1788 * [2] reason 1789 */ 1790 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 1791 reason = le16toh(*(uint16_t *)frm); 1792 1793 vap->iv_stats.is_rx_deauth++; 1794 vap->iv_stats.is_rx_deauth_code = reason; 1795 IEEE80211_NODE_STAT(ni, rx_deauth); 1796 1797 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 1798 "recv deauthenticate (reason: %d (%s))", reason, 1799 ieee80211_reason_to_string(reason)); 1800 ieee80211_new_state(vap, IEEE80211_S_AUTH, 1801 (reason << 8) | IEEE80211_FC0_SUBTYPE_DEAUTH); 1802 break; 1803 } 1804 1805 case IEEE80211_FC0_SUBTYPE_DISASSOC: { 1806 uint16_t reason; 1807 1808 if (vap->iv_state != IEEE80211_S_RUN && 1809 vap->iv_state != IEEE80211_S_ASSOC && 1810 vap->iv_state != IEEE80211_S_AUTH) { 1811 vap->iv_stats.is_rx_mgtdiscard++; 1812 return; 1813 } 1814 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 1815 /* NB: can happen when in promiscuous mode */ 1816 vap->iv_stats.is_rx_mgtdiscard++; 1817 break; 1818 } 1819 1820 /* 1821 * disassoc frame format 1822 * [2] reason 1823 */ 1824 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 1825 reason = le16toh(*(uint16_t *)frm); 1826 1827 vap->iv_stats.is_rx_disassoc++; 1828 vap->iv_stats.is_rx_disassoc_code = reason; 1829 IEEE80211_NODE_STAT(ni, rx_disassoc); 1830 1831 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 1832 "recv disassociate (reason: %d (%s))", reason, 1833 ieee80211_reason_to_string(reason)); 1834 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 1835 break; 1836 } 1837 1838 case IEEE80211_FC0_SUBTYPE_ACTION: 1839 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 1840 if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 1841 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1842 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1843 wh, NULL, "%s", "not for us"); 1844 vap->iv_stats.is_rx_mgtdiscard++; 1845 } else if (vap->iv_state != IEEE80211_S_RUN) { 1846 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1847 wh, NULL, "wrong state %s", 1848 ieee80211_state_name[vap->iv_state]); 1849 vap->iv_stats.is_rx_mgtdiscard++; 1850 } else { 1851 if (ieee80211_parse_action(ni, m0) == 0) 1852 (void)ic->ic_recv_action(ni, wh, frm, efrm); 1853 } 1854 break; 1855 1856 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1857 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 1858 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1859 case IEEE80211_FC0_SUBTYPE_TIMING_ADV: 1860 case IEEE80211_FC0_SUBTYPE_ATIM: 1861 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1862 wh, NULL, "%s", "not handled"); 1863 vap->iv_stats.is_rx_mgtdiscard++; 1864 break; 1865 1866 default: 1867 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1868 wh, "mgt", "subtype 0x%x not handled", subtype); 1869 vap->iv_stats.is_rx_badsubtype++; 1870 break; 1871 } 1872 #undef ISREASSOC 1873 #undef ISPROBE 1874 } 1875 1876 static void 1877 sta_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 1878 { 1879 switch (subtype) { 1880 case IEEE80211_FC0_SUBTYPE_BAR: 1881 ieee80211_recv_bar(ni, m); 1882 break; 1883 } 1884 } 1885