1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 #ifdef __FreeBSD__ 30 __FBSDID("$FreeBSD$"); 31 #endif 32 33 /* 34 * IEEE 802.11 Station mode support. 35 */ 36 #include "opt_inet.h" 37 #include "opt_wlan.h" 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/mbuf.h> 42 #include <sys/malloc.h> 43 #include <sys/kernel.h> 44 45 #include <sys/socket.h> 46 #include <sys/sockio.h> 47 #include <sys/endian.h> 48 #include <sys/errno.h> 49 #include <sys/proc.h> 50 #include <sys/sysctl.h> 51 52 #include <net/if.h> 53 #include <net/if_media.h> 54 #include <net/if_llc.h> 55 #include <net/if_dl.h> 56 #include <net/if_var.h> 57 #include <net/ethernet.h> 58 59 #include <net/bpf.h> 60 61 #include <net80211/ieee80211_var.h> 62 #include <net80211/ieee80211_sta.h> 63 #include <net80211/ieee80211_input.h> 64 #ifdef IEEE80211_SUPPORT_SUPERG 65 #include <net80211/ieee80211_superg.h> 66 #endif 67 #include <net80211/ieee80211_ratectl.h> 68 #include <net80211/ieee80211_sta.h> 69 #include <net80211/ieee80211_vht.h> 70 71 #define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2) 72 73 static void sta_vattach(struct ieee80211vap *); 74 static void sta_beacon_miss(struct ieee80211vap *); 75 static int sta_newstate(struct ieee80211vap *, enum ieee80211_state, int); 76 static int sta_input(struct ieee80211_node *, struct mbuf *, 77 const struct ieee80211_rx_stats *, int, int); 78 static void sta_recv_mgmt(struct ieee80211_node *, struct mbuf *, 79 int subtype, const struct ieee80211_rx_stats *, int rssi, int nf); 80 static void sta_recv_ctl(struct ieee80211_node *, struct mbuf *, int subtype); 81 82 void 83 ieee80211_sta_attach(struct ieee80211com *ic) 84 { 85 ic->ic_vattach[IEEE80211_M_STA] = sta_vattach; 86 } 87 88 void 89 ieee80211_sta_detach(struct ieee80211com *ic) 90 { 91 } 92 93 static void 94 sta_vdetach(struct ieee80211vap *vap) 95 { 96 } 97 98 static void 99 sta_vattach(struct ieee80211vap *vap) 100 { 101 vap->iv_newstate = sta_newstate; 102 vap->iv_input = sta_input; 103 vap->iv_recv_mgmt = sta_recv_mgmt; 104 vap->iv_recv_ctl = sta_recv_ctl; 105 vap->iv_opdetach = sta_vdetach; 106 vap->iv_bmiss = sta_beacon_miss; 107 } 108 109 /* 110 * Handle a beacon miss event. The common code filters out 111 * spurious events that can happen when scanning and/or before 112 * reaching RUN state. 113 */ 114 static void 115 sta_beacon_miss(struct ieee80211vap *vap) 116 { 117 struct ieee80211com *ic = vap->iv_ic; 118 119 IEEE80211_LOCK_ASSERT(ic); 120 121 KASSERT((ic->ic_flags & IEEE80211_F_SCAN) == 0, ("scanning")); 122 KASSERT(vap->iv_state >= IEEE80211_S_RUN, 123 ("wrong state %s", ieee80211_state_name[vap->iv_state])); 124 125 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 126 "beacon miss, mode %s state %s\n", 127 ieee80211_opmode_name[vap->iv_opmode], 128 ieee80211_state_name[vap->iv_state]); 129 130 if (vap->iv_state == IEEE80211_S_CSA) { 131 /* 132 * A Channel Switch is pending; assume we missed the 133 * beacon that would've completed the process and just 134 * force the switch. If we made a mistake we'll not 135 * find the AP on the new channel and fall back to a 136 * normal scan. 137 */ 138 ieee80211_csa_completeswitch(ic); 139 return; 140 } 141 if (++vap->iv_bmiss_count < vap->iv_bmiss_max) { 142 /* 143 * Send a directed probe req before falling back to a 144 * scan; if we receive a response ic_bmiss_count will 145 * be reset. Some cards mistakenly report beacon miss 146 * so this avoids the expensive scan if the ap is 147 * still there. 148 */ 149 ieee80211_send_probereq(vap->iv_bss, vap->iv_myaddr, 150 vap->iv_bss->ni_bssid, vap->iv_bss->ni_bssid, 151 vap->iv_bss->ni_essid, vap->iv_bss->ni_esslen); 152 return; 153 } 154 155 callout_stop(&vap->iv_swbmiss); 156 vap->iv_bmiss_count = 0; 157 vap->iv_stats.is_beacon_miss++; 158 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 159 #ifdef IEEE80211_SUPPORT_SUPERG 160 161 /* 162 * If we receive a beacon miss interrupt when using 163 * dynamic turbo, attempt to switch modes before 164 * reassociating. 165 */ 166 if (IEEE80211_ATH_CAP(vap, vap->iv_bss, IEEE80211_NODE_TURBOP)) 167 ieee80211_dturbo_switch(vap, 168 ic->ic_bsschan->ic_flags ^ IEEE80211_CHAN_TURBO); 169 #endif 170 /* 171 * Try to reassociate before scanning for a new ap. 172 */ 173 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 174 } else { 175 /* 176 * Somebody else is controlling state changes (e.g. 177 * a user-mode app) don't do anything that would 178 * confuse them; just drop into scan mode so they'll 179 * notified of the state change and given control. 180 */ 181 ieee80211_new_state(vap, IEEE80211_S_SCAN, 0); 182 } 183 } 184 185 /* 186 * Handle deauth with reason. We retry only for 187 * the cases where we might succeed. Otherwise 188 * we downgrade the ap and scan. 189 */ 190 static void 191 sta_authretry(struct ieee80211vap *vap, struct ieee80211_node *ni, int reason) 192 { 193 switch (reason) { 194 case IEEE80211_STATUS_SUCCESS: /* NB: MLME assoc */ 195 case IEEE80211_STATUS_TIMEOUT: 196 case IEEE80211_REASON_ASSOC_EXPIRE: 197 case IEEE80211_REASON_NOT_AUTHED: 198 case IEEE80211_REASON_NOT_ASSOCED: 199 case IEEE80211_REASON_ASSOC_LEAVE: 200 case IEEE80211_REASON_ASSOC_NOT_AUTHED: 201 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, 1); 202 break; 203 default: 204 ieee80211_scan_assoc_fail(vap, vap->iv_bss->ni_macaddr, reason); 205 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 206 ieee80211_check_scan_current(vap); 207 break; 208 } 209 } 210 211 static void 212 sta_swbmiss_start(struct ieee80211vap *vap) 213 { 214 215 if (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS) { 216 /* 217 * Start s/w beacon miss timer for devices w/o 218 * hardware support. We fudge a bit here since 219 * we're doing this in software. 220 */ 221 vap->iv_swbmiss_period = IEEE80211_TU_TO_TICKS( 222 2 * vap->iv_bmissthreshold * vap->iv_bss->ni_intval); 223 vap->iv_swbmiss_count = 0; 224 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, 225 ieee80211_swbmiss, vap); 226 } 227 } 228 229 /* 230 * IEEE80211_M_STA vap state machine handler. 231 * This routine handles the main states in the 802.11 protocol. 232 */ 233 static int 234 sta_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 235 { 236 struct ieee80211com *ic = vap->iv_ic; 237 struct ieee80211_node *ni; 238 enum ieee80211_state ostate; 239 240 IEEE80211_LOCK_ASSERT(ic); 241 242 ostate = vap->iv_state; 243 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 244 __func__, ieee80211_state_name[ostate], 245 ieee80211_state_name[nstate], arg); 246 vap->iv_state = nstate; /* state transition */ 247 callout_stop(&vap->iv_mgtsend); /* XXX callout_drain */ 248 if (ostate != IEEE80211_S_SCAN) 249 ieee80211_cancel_scan(vap); /* background scan */ 250 ni = vap->iv_bss; /* NB: no reference held */ 251 if (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS) 252 callout_stop(&vap->iv_swbmiss); 253 switch (nstate) { 254 case IEEE80211_S_INIT: 255 switch (ostate) { 256 case IEEE80211_S_SLEEP: 257 /* XXX wakeup */ 258 /* XXX driver hook to wakeup the hardware? */ 259 case IEEE80211_S_RUN: 260 IEEE80211_SEND_MGMT(ni, 261 IEEE80211_FC0_SUBTYPE_DISASSOC, 262 IEEE80211_REASON_ASSOC_LEAVE); 263 ieee80211_sta_leave(ni); 264 break; 265 case IEEE80211_S_ASSOC: 266 IEEE80211_SEND_MGMT(ni, 267 IEEE80211_FC0_SUBTYPE_DEAUTH, 268 IEEE80211_REASON_AUTH_LEAVE); 269 break; 270 case IEEE80211_S_SCAN: 271 ieee80211_cancel_scan(vap); 272 break; 273 default: 274 break; 275 } 276 if (ostate != IEEE80211_S_INIT) { 277 /* NB: optimize INIT -> INIT case */ 278 ieee80211_reset_bss(vap); 279 } 280 if (vap->iv_auth->ia_detach != NULL) 281 vap->iv_auth->ia_detach(vap); 282 break; 283 case IEEE80211_S_SCAN: 284 switch (ostate) { 285 case IEEE80211_S_INIT: 286 /* 287 * Initiate a scan. We can come here as a result 288 * of an IEEE80211_IOC_SCAN_REQ too in which case 289 * the vap will be marked with IEEE80211_FEXT_SCANREQ 290 * and the scan request parameters will be present 291 * in iv_scanreq. Otherwise we do the default. 292 */ 293 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 294 ieee80211_check_scan(vap, 295 vap->iv_scanreq_flags, 296 vap->iv_scanreq_duration, 297 vap->iv_scanreq_mindwell, 298 vap->iv_scanreq_maxdwell, 299 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 300 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 301 } else 302 ieee80211_check_scan_current(vap); 303 break; 304 case IEEE80211_S_SCAN: 305 case IEEE80211_S_AUTH: 306 case IEEE80211_S_ASSOC: 307 /* 308 * These can happen either because of a timeout 309 * on an assoc/auth response or because of a 310 * change in state that requires a reset. For 311 * the former we're called with a non-zero arg 312 * that is the cause for the failure; pass this 313 * to the scan code so it can update state. 314 * Otherwise trigger a new scan unless we're in 315 * manual roaming mode in which case an application 316 * must issue an explicit scan request. 317 */ 318 if (arg != 0) 319 ieee80211_scan_assoc_fail(vap, 320 vap->iv_bss->ni_macaddr, arg); 321 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 322 ieee80211_check_scan_current(vap); 323 break; 324 case IEEE80211_S_SLEEP: /* beacon miss */ 325 /* 326 * XXX if in sleep we need to wakeup the hardware. 327 */ 328 /* FALLTHROUGH */ 329 case IEEE80211_S_RUN: /* beacon miss */ 330 /* 331 * Beacon miss. Notify user space and if not 332 * under control of a user application (roaming 333 * manual) kick off a scan to re-connect. 334 */ 335 336 ieee80211_sta_leave(ni); 337 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 338 ieee80211_check_scan_current(vap); 339 break; 340 default: 341 goto invalid; 342 } 343 break; 344 case IEEE80211_S_AUTH: 345 switch (ostate) { 346 case IEEE80211_S_INIT: 347 case IEEE80211_S_SCAN: 348 IEEE80211_SEND_MGMT(ni, 349 IEEE80211_FC0_SUBTYPE_AUTH, 1); 350 break; 351 case IEEE80211_S_AUTH: 352 case IEEE80211_S_ASSOC: 353 switch (arg & 0xff) { 354 case IEEE80211_FC0_SUBTYPE_AUTH: 355 /* ??? */ 356 IEEE80211_SEND_MGMT(ni, 357 IEEE80211_FC0_SUBTYPE_AUTH, 2); 358 break; 359 case IEEE80211_FC0_SUBTYPE_DEAUTH: 360 sta_authretry(vap, ni, arg>>8); 361 break; 362 } 363 break; 364 case IEEE80211_S_SLEEP: 365 case IEEE80211_S_RUN: 366 switch (arg & 0xff) { 367 case IEEE80211_FC0_SUBTYPE_AUTH: 368 IEEE80211_SEND_MGMT(ni, 369 IEEE80211_FC0_SUBTYPE_AUTH, 2); 370 vap->iv_state = IEEE80211_S_RUN; /* stay RUN */ 371 break; 372 case IEEE80211_FC0_SUBTYPE_DEAUTH: 373 ieee80211_sta_leave(ni); 374 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 375 /* try to reauth */ 376 IEEE80211_SEND_MGMT(ni, 377 IEEE80211_FC0_SUBTYPE_AUTH, 1); 378 } 379 break; 380 } 381 break; 382 default: 383 goto invalid; 384 } 385 break; 386 case IEEE80211_S_ASSOC: 387 switch (ostate) { 388 case IEEE80211_S_AUTH: 389 case IEEE80211_S_ASSOC: 390 IEEE80211_SEND_MGMT(ni, 391 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 392 break; 393 case IEEE80211_S_SLEEP: /* cannot happen */ 394 case IEEE80211_S_RUN: 395 ieee80211_sta_leave(ni); 396 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 397 IEEE80211_SEND_MGMT(ni, arg ? 398 IEEE80211_FC0_SUBTYPE_REASSOC_REQ : 399 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 400 } 401 break; 402 default: 403 goto invalid; 404 } 405 break; 406 case IEEE80211_S_RUN: 407 if (vap->iv_flags & IEEE80211_F_WPA) { 408 /* XXX validate prerequisites */ 409 } 410 switch (ostate) { 411 case IEEE80211_S_RUN: 412 case IEEE80211_S_CSA: 413 break; 414 case IEEE80211_S_AUTH: /* when join is done in fw */ 415 case IEEE80211_S_ASSOC: 416 #ifdef IEEE80211_DEBUG 417 if (ieee80211_msg_debug(vap)) { 418 ieee80211_note(vap, "%s with %s ssid ", 419 (vap->iv_opmode == IEEE80211_M_STA ? 420 "associated" : "synchronized"), 421 ether_sprintf(ni->ni_bssid)); 422 ieee80211_print_essid(vap->iv_bss->ni_essid, 423 ni->ni_esslen); 424 /* XXX MCS/HT */ 425 printf(" channel %d start %uMb\n", 426 ieee80211_chan2ieee(ic, ic->ic_curchan), 427 IEEE80211_RATE2MBS(ni->ni_txrate)); 428 } 429 #endif 430 ieee80211_scan_assoc_success(vap, ni->ni_macaddr); 431 ieee80211_notify_node_join(ni, 432 arg == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 433 break; 434 case IEEE80211_S_SLEEP: 435 /* Wake up from sleep */ 436 vap->iv_sta_ps(vap, 0); 437 break; 438 default: 439 goto invalid; 440 } 441 ieee80211_sync_curchan(ic); 442 if (ostate != IEEE80211_S_RUN) 443 sta_swbmiss_start(vap); 444 /* 445 * When 802.1x is not in use mark the port authorized 446 * at this point so traffic can flow. 447 */ 448 if (ni->ni_authmode != IEEE80211_AUTH_8021X) 449 ieee80211_node_authorize(ni); 450 /* 451 * Fake association when joining an existing bss. 452 * 453 * Don't do this if we're doing SLEEP->RUN. 454 */ 455 if (ic->ic_newassoc != NULL && ostate != IEEE80211_S_SLEEP) 456 ic->ic_newassoc(vap->iv_bss, (ostate != IEEE80211_S_RUN)); 457 break; 458 case IEEE80211_S_CSA: 459 if (ostate != IEEE80211_S_RUN) 460 goto invalid; 461 break; 462 case IEEE80211_S_SLEEP: 463 sta_swbmiss_start(vap); 464 vap->iv_sta_ps(vap, 1); 465 break; 466 default: 467 invalid: 468 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 469 "%s: unexpected state transition %s -> %s\n", __func__, 470 ieee80211_state_name[ostate], ieee80211_state_name[nstate]); 471 break; 472 } 473 return 0; 474 } 475 476 /* 477 * Return non-zero if the frame is an echo of a multicast 478 * frame sent by ourself. The dir is known to be DSTODS. 479 */ 480 static __inline int 481 isdstods_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh) 482 { 483 #define QWH4(wh) ((const struct ieee80211_qosframe_addr4 *)wh) 484 #define WH4(wh) ((const struct ieee80211_frame_addr4 *)wh) 485 const uint8_t *sa; 486 487 KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode")); 488 489 if (!IEEE80211_IS_MULTICAST(wh->i_addr3)) 490 return 0; 491 sa = IEEE80211_QOS_HAS_SEQ(wh) ? QWH4(wh)->i_addr4 : WH4(wh)->i_addr4; 492 return IEEE80211_ADDR_EQ(sa, vap->iv_myaddr); 493 #undef WH4 494 #undef QWH4 495 } 496 497 /* 498 * Return non-zero if the frame is an echo of a multicast 499 * frame sent by ourself. The dir is known to be FROMDS. 500 */ 501 static __inline int 502 isfromds_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh) 503 { 504 KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode")); 505 506 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) 507 return 0; 508 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 509 } 510 511 /* 512 * Decide if a received management frame should be 513 * printed when debugging is enabled. This filters some 514 * of the less interesting frames that come frequently 515 * (e.g. beacons). 516 */ 517 static __inline int 518 doprint(struct ieee80211vap *vap, int subtype) 519 { 520 switch (subtype) { 521 case IEEE80211_FC0_SUBTYPE_BEACON: 522 return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN); 523 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 524 return 0; 525 } 526 return 1; 527 } 528 529 /* 530 * Process a received frame. The node associated with the sender 531 * should be supplied. If nothing was found in the node table then 532 * the caller is assumed to supply a reference to iv_bss instead. 533 * The RSSI and a timestamp are also supplied. The RSSI data is used 534 * during AP scanning to select a AP to associate with; it can have 535 * any units so long as values have consistent units and higher values 536 * mean ``better signal''. The receive timestamp is currently not used 537 * by the 802.11 layer. 538 */ 539 static int 540 sta_input(struct ieee80211_node *ni, struct mbuf *m, 541 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 542 { 543 struct ieee80211vap *vap = ni->ni_vap; 544 struct ieee80211com *ic = ni->ni_ic; 545 struct ifnet *ifp = vap->iv_ifp; 546 struct ieee80211_frame *wh; 547 struct ieee80211_key *key; 548 struct ether_header *eh; 549 int hdrspace, need_tap = 1; /* mbuf need to be tapped. */ 550 uint8_t dir, type, subtype, qos; 551 uint8_t *bssid; 552 int is_hw_decrypted = 0; 553 int has_decrypted = 0; 554 555 KASSERT(ni != NULL, ("%s: null node, mbuf %p", __func__, m)); 556 557 /* Early init in case of early error case. */ 558 type = -1; 559 560 /* 561 * Bit of a cheat here, we use a pointer for a 3-address 562 * frame format but don't reference fields past outside 563 * ieee80211_frame_min (or other shorter frames) w/o first 564 * validating the data is present. 565 */ 566 wh = mtod(m, struct ieee80211_frame *); 567 568 if (m->m_pkthdr.len < 2 || m->m_pkthdr.len < ieee80211_anyhdrsize(wh)) { 569 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 570 ni->ni_macaddr, NULL, 571 "too short (1): len %u", m->m_pkthdr.len); 572 vap->iv_stats.is_rx_tooshort++; 573 goto err; 574 } 575 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 576 IEEE80211_FC0_VERSION_0) { 577 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 578 ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x", 579 wh->i_fc[0], wh->i_fc[1]); 580 vap->iv_stats.is_rx_badversion++; 581 goto err; 582 } 583 584 /* 585 * Some devices do hardware decryption all the way through 586 * to pretending the frame wasn't encrypted in the first place. 587 * So, tag it appropriately so it isn't discarded inappropriately. 588 */ 589 if ((rxs != NULL) && (rxs->c_pktflags & IEEE80211_RX_F_DECRYPTED)) 590 is_hw_decrypted = 1; 591 592 if (m->m_flags & M_AMPDU_MPDU) { 593 /* 594 * Fastpath for A-MPDU reorder q resubmission. Frames 595 * w/ M_AMPDU_MPDU marked have already passed through 596 * here but were received out of order and been held on 597 * the reorder queue. When resubmitted they are marked 598 * with the M_AMPDU_MPDU flag and we can bypass most of 599 * the normal processing. 600 */ 601 type = IEEE80211_FC0_TYPE_DATA; 602 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 603 subtype = IEEE80211_FC0_SUBTYPE_QOS; 604 hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ 605 goto resubmit_ampdu; 606 } 607 608 ni->ni_inact = ni->ni_inact_reload; 609 610 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 611 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 612 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 613 /* 614 * Control frames are not folowing the header scheme of data and mgmt 615 * frames so we do not apply extra checks here. 616 * We probably should do checks on RA (+TA) where available for those 617 * too, but for now do not drop them. 618 */ 619 if (type != IEEE80211_FC0_TYPE_CTL && 620 (ic->ic_flags & IEEE80211_F_SCAN) == 0) { 621 bssid = wh->i_addr2; 622 if (!IEEE80211_ADDR_EQ(bssid, ni->ni_bssid)) { 623 /* not interested in */ 624 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 625 bssid, NULL, "%s", "not to bss"); 626 vap->iv_stats.is_rx_wrongbss++; 627 goto out; 628 } 629 630 /* 631 * Some devices may be in a promiscuous mode 632 * where they receive frames for multiple station 633 * addresses. 634 * 635 * If we receive a data frame that isn't 636 * destined to our VAP MAC, drop it. 637 * 638 * XXX TODO: This is only enforced when not scanning; 639 * XXX it assumes a software-driven scan will put the NIC 640 * XXX into a "no data frames" mode before setting this 641 * XXX flag. Otherwise it may be possible that we'll still 642 * XXX process data frames whilst scanning. 643 */ 644 if ((! IEEE80211_IS_MULTICAST(wh->i_addr1)) 645 && (! IEEE80211_ADDR_EQ(wh->i_addr1, IF_LLADDR(ifp)))) { 646 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 647 bssid, NULL, "not to cur sta: lladdr=%6D, addr1=%6D", 648 IF_LLADDR(ifp), ":", wh->i_addr1, ":"); 649 vap->iv_stats.is_rx_wrongbss++; 650 goto out; 651 } 652 653 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 654 ni->ni_noise = nf; 655 if ( IEEE80211_HAS_SEQ(type, subtype) && 656 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 657 uint8_t tid = ieee80211_gettid(wh); 658 if (IEEE80211_QOS_HAS_SEQ(wh) && 659 TID_TO_WME_AC(tid) >= WME_AC_VI) 660 ic->ic_wme.wme_hipri_traffic++; 661 if (! ieee80211_check_rxseq(ni, wh, bssid, rxs)) 662 goto out; 663 } 664 } 665 666 switch (type) { 667 case IEEE80211_FC0_TYPE_DATA: 668 hdrspace = ieee80211_hdrspace(ic, wh); 669 if (m->m_len < hdrspace && 670 (m = m_pullup(m, hdrspace)) == NULL) { 671 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 672 ni->ni_macaddr, NULL, 673 "data too short: expecting %u", hdrspace); 674 vap->iv_stats.is_rx_tooshort++; 675 goto out; /* XXX */ 676 } 677 /* 678 * Handle A-MPDU re-ordering. If the frame is to be 679 * processed directly then ieee80211_ampdu_reorder 680 * will return 0; otherwise it has consumed the mbuf 681 * and we should do nothing more with it. 682 */ 683 if ((m->m_flags & M_AMPDU) && 684 (dir == IEEE80211_FC1_DIR_FROMDS || 685 dir == IEEE80211_FC1_DIR_DSTODS) && 686 ieee80211_ampdu_reorder(ni, m, rxs) != 0) { 687 m = NULL; 688 goto out; 689 } 690 resubmit_ampdu: 691 if (dir == IEEE80211_FC1_DIR_FROMDS) { 692 if ((ifp->if_flags & IFF_SIMPLEX) && 693 isfromds_mcastecho(vap, wh)) { 694 /* 695 * In IEEE802.11 network, multicast 696 * packets sent from "me" are broadcast 697 * from the AP; silently discard for 698 * SIMPLEX interface. 699 */ 700 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 701 wh, "data", "%s", "multicast echo"); 702 vap->iv_stats.is_rx_mcastecho++; 703 goto out; 704 } 705 if ((vap->iv_flags & IEEE80211_F_DWDS) && 706 IEEE80211_IS_MULTICAST(wh->i_addr1)) { 707 /* 708 * DWDS sta's must drop 3-address mcast frames 709 * as they will be sent separately as a 4-addr 710 * frame. Accepting the 3-addr frame will 711 * confuse the bridge into thinking the sending 712 * sta is located at the end of WDS link. 713 */ 714 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 715 "3-address data", "%s", "DWDS enabled"); 716 vap->iv_stats.is_rx_mcastecho++; 717 goto out; 718 } 719 } else if (dir == IEEE80211_FC1_DIR_DSTODS) { 720 if ((vap->iv_flags & IEEE80211_F_DWDS) == 0) { 721 IEEE80211_DISCARD(vap, 722 IEEE80211_MSG_INPUT, wh, "4-address data", 723 "%s", "DWDS not enabled"); 724 vap->iv_stats.is_rx_wrongdir++; 725 goto out; 726 } 727 if ((ifp->if_flags & IFF_SIMPLEX) && 728 isdstods_mcastecho(vap, wh)) { 729 /* 730 * In IEEE802.11 network, multicast 731 * packets sent from "me" are broadcast 732 * from the AP; silently discard for 733 * SIMPLEX interface. 734 */ 735 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 736 "4-address data", "%s", "multicast echo"); 737 vap->iv_stats.is_rx_mcastecho++; 738 goto out; 739 } 740 } else { 741 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 742 "data", "incorrect dir 0x%x", dir); 743 vap->iv_stats.is_rx_wrongdir++; 744 goto out; 745 } 746 747 /* 748 * Handle privacy requirements for hardware decryption 749 * devices. 750 * 751 * For those devices, a handful of things happen. 752 * 753 * + If IV has been stripped, then we can't run 754 * ieee80211_crypto_decap() - none of the key 755 * + If MIC has been stripped, we can't validate 756 * MIC here. 757 * + If MIC fails, then we need to communicate a 758 * MIC failure up to the stack - but we don't know 759 * which key was used. 760 */ 761 762 /* 763 * Handle privacy requirements. Note that we 764 * must not be preempted from here until after 765 * we (potentially) call ieee80211_crypto_demic; 766 * otherwise we may violate assumptions in the 767 * crypto cipher modules used to do delayed update 768 * of replay sequence numbers. 769 */ 770 if (is_hw_decrypted || wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 771 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 772 /* 773 * Discard encrypted frames when privacy is off. 774 */ 775 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 776 wh, "WEP", "%s", "PRIVACY off"); 777 vap->iv_stats.is_rx_noprivacy++; 778 IEEE80211_NODE_STAT(ni, rx_noprivacy); 779 goto out; 780 } 781 if (ieee80211_crypto_decap(ni, m, hdrspace, &key) == 0) { 782 /* NB: stats+msgs handled in crypto_decap */ 783 IEEE80211_NODE_STAT(ni, rx_wepfail); 784 goto out; 785 } 786 wh = mtod(m, struct ieee80211_frame *); 787 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 788 has_decrypted = 1; 789 } else { 790 /* XXX M_WEP and IEEE80211_F_PRIVACY */ 791 key = NULL; 792 } 793 794 /* 795 * Save QoS bits for use below--before we strip the header. 796 */ 797 if (subtype == IEEE80211_FC0_SUBTYPE_QOS) 798 qos = ieee80211_getqos(wh)[0]; 799 else 800 qos = 0; 801 802 /* 803 * Next up, any fragmentation. 804 */ 805 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 806 m = ieee80211_defrag(ni, m, hdrspace, has_decrypted); 807 if (m == NULL) { 808 /* Fragment dropped or frame not complete yet */ 809 goto out; 810 } 811 } 812 wh = NULL; /* no longer valid, catch any uses */ 813 814 /* 815 * Next strip any MSDU crypto bits. 816 * 817 * Note: we can't do MIC stripping/verification if the 818 * upper layer has stripped it. We have to check MIC 819 * ourselves. So, key may be NULL, but we have to check 820 * the RX status. 821 */ 822 if (!ieee80211_crypto_demic(vap, key, m, 0)) { 823 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 824 ni->ni_macaddr, "data", "%s", "demic error"); 825 vap->iv_stats.is_rx_demicfail++; 826 IEEE80211_NODE_STAT(ni, rx_demicfail); 827 goto out; 828 } 829 830 /* copy to listener after decrypt */ 831 if (ieee80211_radiotap_active_vap(vap)) 832 ieee80211_radiotap_rx(vap, m); 833 need_tap = 0; 834 835 /* 836 * Finally, strip the 802.11 header. 837 */ 838 m = ieee80211_decap(vap, m, hdrspace, qos); 839 if (m == NULL) { 840 /* XXX mask bit to check for both */ 841 /* don't count Null data frames as errors */ 842 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 843 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 844 goto out; 845 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 846 ni->ni_macaddr, "data", "%s", "decap error"); 847 vap->iv_stats.is_rx_decap++; 848 IEEE80211_NODE_STAT(ni, rx_decap); 849 goto err; 850 } 851 if (!(qos & IEEE80211_QOS_AMSDU)) 852 eh = mtod(m, struct ether_header *); 853 else 854 eh = NULL; 855 if (!ieee80211_node_is_authorized(ni)) { 856 /* 857 * Deny any non-PAE frames received prior to 858 * authorization. For open/shared-key 859 * authentication the port is mark authorized 860 * after authentication completes. For 802.1x 861 * the port is not marked authorized by the 862 * authenticator until the handshake has completed. 863 */ 864 if (eh == NULL || 865 eh->ether_type != htons(ETHERTYPE_PAE)) { 866 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 867 ni->ni_macaddr, "data", "unauthorized or " 868 "unknown port: ether type 0x%x len %u", 869 eh == NULL ? -1 : eh->ether_type, 870 m->m_pkthdr.len); 871 vap->iv_stats.is_rx_unauth++; 872 IEEE80211_NODE_STAT(ni, rx_unauth); 873 goto err; 874 } 875 } else { 876 /* 877 * When denying unencrypted frames, discard 878 * any non-PAE frames received without encryption. 879 */ 880 if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && 881 ((has_decrypted == 0) && (m->m_flags & M_WEP) == 0) && 882 (is_hw_decrypted == 0) && 883 (eh == NULL || 884 eh->ether_type != htons(ETHERTYPE_PAE))) { 885 /* 886 * Drop unencrypted frames. 887 */ 888 vap->iv_stats.is_rx_unencrypted++; 889 IEEE80211_NODE_STAT(ni, rx_unencrypted); 890 goto out; 891 } 892 } 893 /* XXX require HT? */ 894 if (qos & IEEE80211_QOS_AMSDU) { 895 m = ieee80211_decap_amsdu(ni, m); 896 if (m == NULL) 897 return IEEE80211_FC0_TYPE_DATA; 898 } else { 899 #ifdef IEEE80211_SUPPORT_SUPERG 900 m = ieee80211_decap_fastframe(vap, ni, m); 901 if (m == NULL) 902 return IEEE80211_FC0_TYPE_DATA; 903 #endif 904 } 905 ieee80211_deliver_data(vap, ni, m); 906 return IEEE80211_FC0_TYPE_DATA; 907 908 case IEEE80211_FC0_TYPE_MGT: 909 vap->iv_stats.is_rx_mgmt++; 910 IEEE80211_NODE_STAT(ni, rx_mgmt); 911 if (dir != IEEE80211_FC1_DIR_NODS) { 912 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 913 wh, "data", "incorrect dir 0x%x", dir); 914 vap->iv_stats.is_rx_wrongdir++; 915 goto err; 916 } 917 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 918 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 919 ni->ni_macaddr, "mgt", "too short: len %u", 920 m->m_pkthdr.len); 921 vap->iv_stats.is_rx_tooshort++; 922 goto out; 923 } 924 #ifdef IEEE80211_DEBUG 925 if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) || 926 ieee80211_msg_dumppkts(vap)) { 927 if_printf(ifp, "received %s from %s rssi %d\n", 928 ieee80211_mgt_subtype_name(subtype), 929 ether_sprintf(wh->i_addr2), rssi); 930 } 931 #endif 932 933 /* 934 * Note: See above for hardware offload privacy requirements. 935 * It also applies here. 936 */ 937 938 /* 939 * Again, having encrypted flag set check would be good, but 940 * then we have to also handle crypto_decap() like above. 941 */ 942 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 943 if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) { 944 /* 945 * Only shared key auth frames with a challenge 946 * should be encrypted, discard all others. 947 */ 948 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 949 wh, ieee80211_mgt_subtype_name(subtype), 950 "%s", "WEP set but not permitted"); 951 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 952 goto out; 953 } 954 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 955 /* 956 * Discard encrypted frames when privacy is off. 957 */ 958 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 959 wh, "mgt", "%s", "WEP set but PRIVACY off"); 960 vap->iv_stats.is_rx_noprivacy++; 961 goto out; 962 } 963 hdrspace = ieee80211_hdrspace(ic, wh); 964 965 /* 966 * Again, if IV/MIC was stripped, then this whole 967 * setup will fail. That's going to need some poking. 968 */ 969 if (ieee80211_crypto_decap(ni, m, hdrspace, &key) == 0) { 970 /* NB: stats+msgs handled in crypto_decap */ 971 goto out; 972 } 973 has_decrypted = 1; 974 wh = mtod(m, struct ieee80211_frame *); 975 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 976 } 977 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); 978 goto out; 979 980 case IEEE80211_FC0_TYPE_CTL: 981 vap->iv_stats.is_rx_ctl++; 982 IEEE80211_NODE_STAT(ni, rx_ctrl); 983 vap->iv_recv_ctl(ni, m, subtype); 984 goto out; 985 986 default: 987 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 988 wh, NULL, "bad frame type 0x%x", type); 989 /* should not come here */ 990 break; 991 } 992 err: 993 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 994 out: 995 if (m != NULL) { 996 if (need_tap && ieee80211_radiotap_active_vap(vap)) 997 ieee80211_radiotap_rx(vap, m); 998 m_freem(m); 999 } 1000 return type; 1001 } 1002 1003 static void 1004 sta_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh, 1005 int rssi, int nf, uint16_t seq, uint16_t status) 1006 { 1007 struct ieee80211vap *vap = ni->ni_vap; 1008 1009 if (ni->ni_authmode == IEEE80211_AUTH_SHARED) { 1010 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1011 ni->ni_macaddr, "open auth", 1012 "bad sta auth mode %u", ni->ni_authmode); 1013 vap->iv_stats.is_rx_bad_auth++; /* XXX */ 1014 return; 1015 } 1016 if (vap->iv_state != IEEE80211_S_AUTH || 1017 seq != IEEE80211_AUTH_OPEN_RESPONSE) { 1018 vap->iv_stats.is_rx_bad_auth++; 1019 return; 1020 } 1021 if (status != 0) { 1022 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 1023 ni, "open auth failed (reason %d)", status); 1024 vap->iv_stats.is_rx_auth_fail++; 1025 vap->iv_stats.is_rx_authfail_code = status; 1026 ieee80211_new_state(vap, IEEE80211_S_SCAN, 1027 IEEE80211_SCAN_FAIL_STATUS); 1028 } else 1029 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 1030 } 1031 1032 static void 1033 sta_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh, 1034 uint8_t *frm, uint8_t *efrm, int rssi, int nf, 1035 uint16_t seq, uint16_t status) 1036 { 1037 struct ieee80211vap *vap = ni->ni_vap; 1038 uint8_t *challenge; 1039 1040 /* 1041 * NB: this can happen as we allow pre-shared key 1042 * authentication to be enabled w/o wep being turned 1043 * on so that configuration of these can be done 1044 * in any order. It may be better to enforce the 1045 * ordering in which case this check would just be 1046 * for sanity/consistency. 1047 */ 1048 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 1049 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1050 ni->ni_macaddr, "shared key auth", 1051 "%s", " PRIVACY is disabled"); 1052 goto bad; 1053 } 1054 /* 1055 * Pre-shared key authentication is evil; accept 1056 * it only if explicitly configured (it is supported 1057 * mainly for compatibility with clients like OS X). 1058 */ 1059 if (ni->ni_authmode != IEEE80211_AUTH_AUTO && 1060 ni->ni_authmode != IEEE80211_AUTH_SHARED) { 1061 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1062 ni->ni_macaddr, "shared key auth", 1063 "bad sta auth mode %u", ni->ni_authmode); 1064 vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */ 1065 goto bad; 1066 } 1067 1068 challenge = NULL; 1069 if (frm + 1 < efrm) { 1070 if ((frm[1] + 2) > (efrm - frm)) { 1071 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1072 ni->ni_macaddr, "shared key auth", 1073 "ie %d/%d too long", 1074 frm[0], (frm[1] + 2) - (efrm - frm)); 1075 vap->iv_stats.is_rx_bad_auth++; 1076 goto bad; 1077 } 1078 if (*frm == IEEE80211_ELEMID_CHALLENGE) 1079 challenge = frm; 1080 frm += frm[1] + 2; 1081 } 1082 switch (seq) { 1083 case IEEE80211_AUTH_SHARED_CHALLENGE: 1084 case IEEE80211_AUTH_SHARED_RESPONSE: 1085 if (challenge == NULL) { 1086 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1087 ni->ni_macaddr, "shared key auth", 1088 "%s", "no challenge"); 1089 vap->iv_stats.is_rx_bad_auth++; 1090 goto bad; 1091 } 1092 if (challenge[1] != IEEE80211_CHALLENGE_LEN) { 1093 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1094 ni->ni_macaddr, "shared key auth", 1095 "bad challenge len %d", challenge[1]); 1096 vap->iv_stats.is_rx_bad_auth++; 1097 goto bad; 1098 } 1099 default: 1100 break; 1101 } 1102 if (vap->iv_state != IEEE80211_S_AUTH) 1103 return; 1104 switch (seq) { 1105 case IEEE80211_AUTH_SHARED_PASS: 1106 if (ni->ni_challenge != NULL) { 1107 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 1108 ni->ni_challenge = NULL; 1109 } 1110 if (status != 0) { 1111 IEEE80211_NOTE_FRAME(vap, 1112 IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, wh, 1113 "shared key auth failed (reason %d)", status); 1114 vap->iv_stats.is_rx_auth_fail++; 1115 vap->iv_stats.is_rx_authfail_code = status; 1116 return; 1117 } 1118 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 1119 break; 1120 case IEEE80211_AUTH_SHARED_CHALLENGE: 1121 if (!ieee80211_alloc_challenge(ni)) 1122 return; 1123 /* XXX could optimize by passing recvd challenge */ 1124 memcpy(ni->ni_challenge, &challenge[2], challenge[1]); 1125 IEEE80211_SEND_MGMT(ni, 1126 IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 1127 break; 1128 default: 1129 IEEE80211_DISCARD(vap, IEEE80211_MSG_AUTH, 1130 wh, "shared key auth", "bad seq %d", seq); 1131 vap->iv_stats.is_rx_bad_auth++; 1132 return; 1133 } 1134 return; 1135 bad: 1136 /* 1137 * Kick the state machine. This short-circuits 1138 * using the mgt frame timeout to trigger the 1139 * state transition. 1140 */ 1141 if (vap->iv_state == IEEE80211_S_AUTH) 1142 ieee80211_new_state(vap, IEEE80211_S_SCAN, 1143 IEEE80211_SCAN_FAIL_STATUS); 1144 } 1145 1146 /* 1147 * Parse the WME IE for QoS and U-APSD information. 1148 * 1149 * Returns -1 if the IE isn't found, 1 if it's found. 1150 */ 1151 int 1152 ieee80211_parse_wmeie(uint8_t *frm, const struct ieee80211_frame *wh, 1153 struct ieee80211_node *ni) 1154 { 1155 u_int len = frm[1]; 1156 1157 ni->ni_uapsd = 0; 1158 1159 if (len < sizeof(struct ieee80211_wme_param)-2) { 1160 IEEE80211_DISCARD_IE(ni->ni_vap, 1161 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WME, 1162 wh, "WME", "too short, len %u", len); 1163 return -1; 1164 } 1165 1166 ni->ni_uapsd = frm[WME_CAPINFO_IE_OFFSET]; 1167 1168 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_POWER | IEEE80211_MSG_ASSOC, 1169 ni, "U-APSD settings from STA: 0x%02x", ni->ni_uapsd); 1170 1171 return 1; 1172 } 1173 1174 int 1175 ieee80211_parse_wmeparams(struct ieee80211vap *vap, uint8_t *frm, 1176 const struct ieee80211_frame *wh, uint8_t *qosinfo) 1177 { 1178 struct ieee80211_wme_state *wme = &vap->iv_ic->ic_wme; 1179 u_int len = frm[1], qosinfo_count; 1180 int i; 1181 1182 *qosinfo = 0; 1183 1184 if (len < sizeof(struct ieee80211_wme_param)-2) { 1185 IEEE80211_DISCARD_IE(vap, 1186 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WME, 1187 wh, "WME", "too short, len %u", len); 1188 return -1; 1189 } 1190 *qosinfo = frm[__offsetof(struct ieee80211_wme_param, param_qosInfo)]; 1191 qosinfo_count = *qosinfo & WME_QOSINFO_COUNT; 1192 1193 /* XXX do proper check for wraparound */ 1194 if (qosinfo_count == wme->wme_wmeChanParams.cap_info) 1195 return 0; 1196 frm += __offsetof(struct ieee80211_wme_param, params_acParams); 1197 for (i = 0; i < WME_NUM_AC; i++) { 1198 struct wmeParams *wmep = 1199 &wme->wme_wmeChanParams.cap_wmeParams[i]; 1200 /* NB: ACI not used */ 1201 wmep->wmep_acm = _IEEE80211_MASKSHIFT(frm[0], WME_PARAM_ACM); 1202 wmep->wmep_aifsn = 1203 _IEEE80211_MASKSHIFT(frm[0], WME_PARAM_AIFSN); 1204 wmep->wmep_logcwmin = 1205 _IEEE80211_MASKSHIFT(frm[1], WME_PARAM_LOGCWMIN); 1206 wmep->wmep_logcwmax = 1207 _IEEE80211_MASKSHIFT(frm[1], WME_PARAM_LOGCWMAX); 1208 wmep->wmep_txopLimit = le16dec(frm+2); 1209 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1210 "%s: WME: %d: acm=%d aifsn=%d logcwmin=%d logcwmax=%d txopLimit=%d\n", 1211 __func__, 1212 i, 1213 wmep->wmep_acm, 1214 wmep->wmep_aifsn, 1215 wmep->wmep_logcwmin, 1216 wmep->wmep_logcwmax, 1217 wmep->wmep_txopLimit); 1218 frm += 4; 1219 } 1220 wme->wme_wmeChanParams.cap_info = qosinfo_count; 1221 return 1; 1222 } 1223 1224 /* 1225 * Process 11h Channel Switch Announcement (CSA) ie. If this 1226 * is the first CSA then initiate the switch. Otherwise we 1227 * track state and trigger completion and/or cancel of the switch. 1228 * XXX should be public for IBSS use 1229 */ 1230 static void 1231 ieee80211_parse_csaparams(struct ieee80211vap *vap, uint8_t *frm, 1232 const struct ieee80211_frame *wh) 1233 { 1234 struct ieee80211com *ic = vap->iv_ic; 1235 const struct ieee80211_csa_ie *csa = 1236 (const struct ieee80211_csa_ie *) frm; 1237 1238 KASSERT(vap->iv_state >= IEEE80211_S_RUN, 1239 ("state %s", ieee80211_state_name[vap->iv_state])); 1240 1241 if (csa->csa_mode > 1) { 1242 IEEE80211_DISCARD_IE(vap, 1243 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1244 wh, "CSA", "invalid mode %u", csa->csa_mode); 1245 return; 1246 } 1247 IEEE80211_LOCK(ic); 1248 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 1249 /* 1250 * Convert the channel number to a channel reference. We 1251 * try first to preserve turbo attribute of the current 1252 * channel then fallback. Note this will not work if the 1253 * CSA specifies a channel that requires a band switch (e.g. 1254 * 11a => 11g). This is intentional as 11h is defined only 1255 * for 5GHz/11a and because the switch does not involve a 1256 * reassociation, protocol state (capabilities, negotated 1257 * rates, etc) may/will be wrong. 1258 */ 1259 struct ieee80211_channel *c = 1260 ieee80211_find_channel_byieee(ic, csa->csa_newchan, 1261 (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALLTURBO)); 1262 if (c == NULL) { 1263 c = ieee80211_find_channel_byieee(ic, 1264 csa->csa_newchan, 1265 (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALL)); 1266 if (c == NULL) { 1267 IEEE80211_DISCARD_IE(vap, 1268 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1269 wh, "CSA", "invalid channel %u", 1270 csa->csa_newchan); 1271 goto done; 1272 } 1273 } 1274 #if IEEE80211_CSA_COUNT_MIN > 0 1275 if (csa->csa_count < IEEE80211_CSA_COUNT_MIN) { 1276 /* 1277 * Require at least IEEE80211_CSA_COUNT_MIN count to 1278 * reduce the risk of being redirected by a fabricated 1279 * CSA. If a valid CSA is dropped we'll still get a 1280 * beacon miss when the AP leaves the channel so we'll 1281 * eventually follow to the new channel. 1282 * 1283 * NOTE: this violates the 11h spec that states that 1284 * count may be any value and if 0 then a switch 1285 * should happen asap. 1286 */ 1287 IEEE80211_DISCARD_IE(vap, 1288 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1289 wh, "CSA", "count %u too small, must be >= %u", 1290 csa->csa_count, IEEE80211_CSA_COUNT_MIN); 1291 goto done; 1292 } 1293 #endif 1294 ieee80211_csa_startswitch(ic, c, csa->csa_mode, csa->csa_count); 1295 } else { 1296 /* 1297 * Validate this ie against the initial CSA. We require 1298 * mode and channel not change and the count must be 1299 * monotonically decreasing. This may be pointless and 1300 * canceling the switch as a result may be too paranoid but 1301 * in the worst case if we drop out of CSA because of this 1302 * and the AP does move then we'll just end up taking a 1303 * beacon miss and scan to find the AP. 1304 * 1305 * XXX may want <= on count as we also process ProbeResp 1306 * frames and those may come in w/ the same count as the 1307 * previous beacon; but doing so leaves us open to a stuck 1308 * count until we add a dead-man timer 1309 */ 1310 if (!(csa->csa_count < ic->ic_csa_count && 1311 csa->csa_mode == ic->ic_csa_mode && 1312 csa->csa_newchan == ieee80211_chan2ieee(ic, ic->ic_csa_newchan))) { 1313 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_DOTH, wh, 1314 "CSA ie mismatch, initial ie <%d,%d,%d>, " 1315 "this ie <%d,%d,%d>", ic->ic_csa_mode, 1316 ic->ic_csa_newchan, ic->ic_csa_count, 1317 csa->csa_mode, csa->csa_newchan, csa->csa_count); 1318 ieee80211_csa_cancelswitch(ic); 1319 } else { 1320 if (csa->csa_count <= 1) 1321 ieee80211_csa_completeswitch(ic); 1322 else 1323 ic->ic_csa_count = csa->csa_count; 1324 } 1325 } 1326 done: 1327 IEEE80211_UNLOCK(ic); 1328 } 1329 1330 /* 1331 * Return non-zero if a background scan may be continued: 1332 * o bg scan is active 1333 * o no channel switch is pending 1334 * o there has not been any traffic recently 1335 * o no full-offload scan support (no need for explicitly continuing scan then) 1336 * 1337 * Note we do not check if there is an administrative enable; 1338 * this is only done to start the scan. We assume that any 1339 * change in state will be accompanied by a request to cancel 1340 * active scans which will otherwise cause this test to fail. 1341 */ 1342 static __inline int 1343 contbgscan(struct ieee80211vap *vap) 1344 { 1345 struct ieee80211com *ic = vap->iv_ic; 1346 1347 return ((ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN) && 1348 (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && 1349 !(vap->iv_flags_ext & IEEE80211_FEXT_SCAN_OFFLOAD) && 1350 vap->iv_state == IEEE80211_S_RUN && /* XXX? */ 1351 ieee80211_time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)); 1352 } 1353 1354 /* 1355 * Return non-zero if a backgrond scan may be started: 1356 * o bg scanning is administratively enabled 1357 * o no channel switch is pending 1358 * o we are not boosted on a dynamic turbo channel 1359 * o there has not been a scan recently 1360 * o there has not been any traffic recently (don't check if full-offload scan) 1361 */ 1362 static __inline int 1363 startbgscan(struct ieee80211vap *vap) 1364 { 1365 struct ieee80211com *ic = vap->iv_ic; 1366 1367 return ((vap->iv_flags & IEEE80211_F_BGSCAN) && 1368 (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && 1369 #ifdef IEEE80211_SUPPORT_SUPERG 1370 !IEEE80211_IS_CHAN_DTURBO(ic->ic_curchan) && 1371 #endif 1372 ieee80211_time_after(ticks, ic->ic_lastscan + vap->iv_bgscanintvl) && 1373 ((vap->iv_flags_ext & IEEE80211_FEXT_SCAN_OFFLOAD) || 1374 ieee80211_time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle))); 1375 } 1376 1377 #ifdef notyet 1378 /* 1379 * Compare two quiet IEs and return if they are equivalent. 1380 * 1381 * The tbttcount isnt checked - that's not part of the configuration. 1382 */ 1383 static int 1384 compare_quiet_ie(const struct ieee80211_quiet_ie *q1, 1385 const struct ieee80211_quiet_ie *q2) 1386 { 1387 1388 if (q1->period != q2->period) 1389 return (0); 1390 if (le16dec(&q1->duration) != le16dec(&q2->duration)) 1391 return (0); 1392 if (le16dec(&q1->offset) != le16dec(&q2->offset)) 1393 return (0); 1394 return (1); 1395 } 1396 #endif 1397 1398 static void 1399 sta_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1400 const struct ieee80211_rx_stats *rxs, 1401 int rssi, int nf) 1402 { 1403 #define ISREASSOC(_st) ((_st) == IEEE80211_FC0_SUBTYPE_REASSOC_RESP) 1404 struct ieee80211vap *vap = ni->ni_vap; 1405 struct ieee80211com *ic = ni->ni_ic; 1406 struct ieee80211_channel *rxchan = ic->ic_curchan; 1407 struct ieee80211_frame *wh; 1408 int ht_state_change = 0, do_ht = 0; 1409 uint8_t *frm, *efrm; 1410 uint8_t *rates, *xrates, *wme, *htcap, *htinfo; 1411 uint8_t *vhtcap, *vhtopmode; 1412 uint8_t rate; 1413 uint8_t qosinfo; 1414 1415 wh = mtod(m0, struct ieee80211_frame *); 1416 frm = (uint8_t *)&wh[1]; 1417 efrm = mtod(m0, uint8_t *) + m0->m_len; 1418 switch (subtype) { 1419 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1420 case IEEE80211_FC0_SUBTYPE_BEACON: { 1421 struct ieee80211_scanparams scan; 1422 struct ieee80211_channel *c; 1423 /* 1424 * We process beacon/probe response frames: 1425 * o when scanning, or 1426 * o station mode when associated (to collect state 1427 * updates such as 802.11g slot time) 1428 * Frames otherwise received are discarded. 1429 */ 1430 if (!((ic->ic_flags & IEEE80211_F_SCAN) || ni->ni_associd)) { 1431 vap->iv_stats.is_rx_mgtdiscard++; 1432 return; 1433 } 1434 1435 /* Override RX channel as appropriate */ 1436 if (rxs != NULL) { 1437 c = ieee80211_lookup_channel_rxstatus(vap, rxs); 1438 if (c != NULL) 1439 rxchan = c; 1440 } 1441 1442 /* XXX probe response in sta mode when !scanning? */ 1443 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0) { 1444 if (! (ic->ic_flags & IEEE80211_F_SCAN)) 1445 vap->iv_stats.is_beacon_bad++; 1446 return; 1447 } 1448 1449 /* 1450 * Count frame now that we know it's to be processed. 1451 */ 1452 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1453 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1454 IEEE80211_NODE_STAT(ni, rx_beacons); 1455 } else 1456 IEEE80211_NODE_STAT(ni, rx_proberesp); 1457 /* 1458 * When operating in station mode, check for state updates. 1459 * Be careful to ignore beacons received while doing a 1460 * background scan. We consider only 11g/WMM stuff right now. 1461 */ 1462 if (ni->ni_associd != 0 && 1463 ((ic->ic_flags & IEEE80211_F_SCAN) == 0 || 1464 IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_bssid))) { 1465 /* record tsf of last beacon */ 1466 memcpy(ni->ni_tstamp.data, scan.tstamp, 1467 sizeof(ni->ni_tstamp)); 1468 /* count beacon frame for s/w bmiss handling */ 1469 vap->iv_swbmiss_count++; 1470 vap->iv_bmiss_count = 0; 1471 if (ni->ni_erp != scan.erp) { 1472 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1473 wh->i_addr2, 1474 "erp change: was 0x%x, now 0x%x", 1475 ni->ni_erp, scan.erp); 1476 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1477 (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) 1478 vap->iv_flags |= IEEE80211_F_USEPROT; 1479 else 1480 vap->iv_flags &= ~IEEE80211_F_USEPROT; 1481 ni->ni_erp = scan.erp; 1482 /* XXX statistic */ 1483 /* driver notification */ 1484 ieee80211_vap_update_erp_protmode(vap); 1485 } 1486 if ((ni->ni_capinfo ^ scan.capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME) { 1487 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1488 wh->i_addr2, 1489 "capabilities change: was 0x%x, now 0x%x", 1490 ni->ni_capinfo, scan.capinfo); 1491 /* 1492 * NB: we assume short preamble doesn't 1493 * change dynamically 1494 */ 1495 ieee80211_vap_set_shortslottime(vap, 1496 IEEE80211_IS_CHAN_A(ic->ic_bsschan) || 1497 (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1498 ni->ni_capinfo = (ni->ni_capinfo &~ IEEE80211_CAPINFO_SHORT_SLOTTIME) 1499 | (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME); 1500 /* XXX statistic */ 1501 } 1502 if (scan.wme != NULL && 1503 (ni->ni_flags & IEEE80211_NODE_QOS)) { 1504 int _retval; 1505 if ((_retval = ieee80211_parse_wmeparams(vap, 1506 scan.wme, wh, &qosinfo)) >= 0) { 1507 if (qosinfo & WME_CAPINFO_UAPSD_EN) 1508 ni->ni_flags |= 1509 IEEE80211_NODE_UAPSD; 1510 if (_retval > 0) 1511 ieee80211_wme_updateparams(vap); 1512 } 1513 } else 1514 ni->ni_flags &= ~IEEE80211_NODE_UAPSD; 1515 #ifdef IEEE80211_SUPPORT_SUPERG 1516 if (scan.ath != NULL) 1517 ieee80211_parse_athparams(ni, scan.ath, wh); 1518 #endif 1519 if (scan.htcap != NULL && scan.htinfo != NULL && 1520 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1521 /* XXX state changes? */ 1522 ieee80211_ht_updateparams(ni, 1523 scan.htcap, scan.htinfo); 1524 do_ht = 1; 1525 } 1526 if (scan.vhtcap != NULL && scan.vhtopmode != NULL && 1527 (vap->iv_flags_vht & IEEE80211_FVHT_VHT)) { 1528 /* XXX state changes? */ 1529 ieee80211_vht_updateparams(ni, 1530 scan.vhtcap, scan.vhtopmode); 1531 do_ht = 1; 1532 } 1533 if (do_ht) { 1534 if (ieee80211_ht_updateparams_final(ni, 1535 scan.htcap, scan.htinfo)) 1536 ht_state_change = 1; 1537 } 1538 1539 /* 1540 * If we have a quiet time IE then report it up to 1541 * the driver. 1542 * 1543 * Otherwise, inform the driver that the quiet time 1544 * IE has disappeared - only do that once rather than 1545 * spamming it each time. 1546 */ 1547 if (scan.quiet) { 1548 ic->ic_set_quiet(ni, scan.quiet); 1549 ni->ni_quiet_ie_set = 1; 1550 memcpy(&ni->ni_quiet_ie, scan.quiet, 1551 sizeof(struct ieee80211_quiet_ie)); 1552 } else { 1553 if (ni->ni_quiet_ie_set == 1) 1554 ic->ic_set_quiet(ni, NULL); 1555 ni->ni_quiet_ie_set = 0; 1556 bzero(&ni->ni_quiet_ie, 1557 sizeof(struct ieee80211_quiet_ie)); 1558 } 1559 1560 if (scan.tim != NULL) { 1561 struct ieee80211_tim_ie *tim = 1562 (struct ieee80211_tim_ie *) scan.tim; 1563 /* 1564 * XXX Check/debug this code; see if it's about 1565 * the right time to force the VAP awake if we 1566 * receive a frame destined for us? 1567 */ 1568 int aid = IEEE80211_AID(ni->ni_associd); 1569 int ix = aid / NBBY; 1570 int min = tim->tim_bitctl &~ 1; 1571 int max = tim->tim_len + min - 4; 1572 int tim_ucast = 0; 1573 #ifdef __notyet__ 1574 int tim_mcast = 0; 1575 #endif 1576 1577 /* 1578 * Only do this for unicast traffic in the TIM 1579 * The multicast traffic notification for 1580 * the scan notification stuff should occur 1581 * differently. 1582 */ 1583 if (min <= ix && ix <= max && 1584 isset(tim->tim_bitmap - min, aid)) { 1585 tim_ucast = 1; 1586 } 1587 1588 #ifdef __notyet__ 1589 /* 1590 * Do a separate notification 1591 * for the multicast bit being set. 1592 */ 1593 if (tim->tim_bitctl & 1) { 1594 tim_mcast = 1; 1595 } 1596 #endif 1597 1598 /* 1599 * If the TIM indicates there's traffic for 1600 * us then get us out of STA mode powersave. 1601 */ 1602 if (tim_ucast == 1) { 1603 /* 1604 * Wake us out of SLEEP state if we're 1605 * in it; and if we're doing bgscan 1606 * then wake us out of STA powersave. 1607 */ 1608 ieee80211_sta_tim_notify(vap, 1); 1609 1610 /* 1611 * This is preventing us from 1612 * continuing a bgscan; because it 1613 * tricks the contbgscan() 1614 * routine to think there's always 1615 * traffic for us. 1616 * 1617 * I think we need both an RX and 1618 * TX ic_lastdata field. 1619 */ 1620 ic->ic_lastdata = ticks; 1621 } 1622 1623 ni->ni_dtim_count = tim->tim_count; 1624 ni->ni_dtim_period = tim->tim_period; 1625 } 1626 if (scan.csa != NULL && 1627 (vap->iv_flags & IEEE80211_F_DOTH)) 1628 ieee80211_parse_csaparams(vap, scan.csa, wh); 1629 else if (ic->ic_flags & IEEE80211_F_CSAPENDING) { 1630 /* 1631 * No CSA ie or 11h disabled, but a channel 1632 * switch is pending; drop out so we aren't 1633 * stuck in CSA state. If the AP really is 1634 * moving we'll get a beacon miss and scan. 1635 */ 1636 IEEE80211_LOCK(ic); 1637 ieee80211_csa_cancelswitch(ic); 1638 IEEE80211_UNLOCK(ic); 1639 } 1640 /* 1641 * If scanning, pass the info to the scan module. 1642 * Otherwise, check if it's the right time to do 1643 * a background scan. Background scanning must 1644 * be enabled and we must not be operating in the 1645 * turbo phase of dynamic turbo mode. Then, 1646 * it's been a while since the last background 1647 * scan and if no data frames have come through 1648 * recently, kick off a scan. Note that this 1649 * is the mechanism by which a background scan 1650 * is started _and_ continued each time we 1651 * return on-channel to receive a beacon from 1652 * our ap. 1653 */ 1654 if (ic->ic_flags & IEEE80211_F_SCAN) { 1655 ieee80211_add_scan(vap, rxchan, 1656 &scan, wh, subtype, rssi, nf); 1657 } else if (contbgscan(vap)) { 1658 ieee80211_bg_scan(vap, 0); 1659 } else if (startbgscan(vap)) { 1660 vap->iv_stats.is_scan_bg++; 1661 #if 0 1662 /* wakeup if we are sleeing */ 1663 ieee80211_set_pwrsave(vap, 0); 1664 #endif 1665 ieee80211_bg_scan(vap, 0); 1666 } 1667 1668 /* 1669 * Put the station to sleep if we haven't seen 1670 * traffic in a while. 1671 */ 1672 IEEE80211_LOCK(ic); 1673 ieee80211_sta_ps_timer_check(vap); 1674 IEEE80211_UNLOCK(ic); 1675 1676 /* 1677 * If we've had a channel width change (eg HT20<->HT40) 1678 * then schedule a delayed driver notification. 1679 */ 1680 if (ht_state_change) 1681 ieee80211_update_chw(ic); 1682 return; 1683 } 1684 /* 1685 * If scanning, just pass information to the scan module. 1686 */ 1687 if (ic->ic_flags & IEEE80211_F_SCAN) { 1688 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1689 /* 1690 * Actively scanning a channel marked passive; 1691 * send a probe request now that we know there 1692 * is 802.11 traffic present. 1693 * 1694 * XXX check if the beacon we recv'd gives 1695 * us what we need and suppress the probe req 1696 */ 1697 ieee80211_probe_curchan(vap, 1); 1698 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1699 } 1700 ieee80211_add_scan(vap, rxchan, &scan, wh, 1701 subtype, rssi, nf); 1702 return; 1703 } 1704 break; 1705 } 1706 1707 case IEEE80211_FC0_SUBTYPE_AUTH: { 1708 uint16_t algo, seq, status; 1709 /* 1710 * auth frame format 1711 * [2] algorithm 1712 * [2] sequence 1713 * [2] status 1714 * [tlv*] challenge 1715 */ 1716 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1717 algo = le16toh(*(uint16_t *)frm); 1718 seq = le16toh(*(uint16_t *)(frm + 2)); 1719 status = le16toh(*(uint16_t *)(frm + 4)); 1720 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2, 1721 "recv auth frame with algorithm %d seq %d", algo, seq); 1722 1723 if (vap->iv_flags & IEEE80211_F_COUNTERM) { 1724 IEEE80211_DISCARD(vap, 1725 IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO, 1726 wh, "auth", "%s", "TKIP countermeasures enabled"); 1727 vap->iv_stats.is_rx_auth_countermeasures++; 1728 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 1729 ieee80211_send_error(ni, wh->i_addr2, 1730 IEEE80211_FC0_SUBTYPE_AUTH, 1731 IEEE80211_REASON_MIC_FAILURE); 1732 } 1733 return; 1734 } 1735 if (algo == IEEE80211_AUTH_ALG_SHARED) 1736 sta_auth_shared(ni, wh, frm + 6, efrm, rssi, nf, 1737 seq, status); 1738 else if (algo == IEEE80211_AUTH_ALG_OPEN) 1739 sta_auth_open(ni, wh, rssi, nf, seq, status); 1740 else { 1741 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1742 wh, "auth", "unsupported alg %d", algo); 1743 vap->iv_stats.is_rx_auth_unsupported++; 1744 return; 1745 } 1746 break; 1747 } 1748 1749 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 1750 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: { 1751 uint16_t capinfo, associd; 1752 uint16_t status; 1753 1754 if (vap->iv_state != IEEE80211_S_ASSOC) { 1755 vap->iv_stats.is_rx_mgtdiscard++; 1756 return; 1757 } 1758 1759 /* 1760 * asresp frame format 1761 * [2] capability information 1762 * [2] status 1763 * [2] association ID 1764 * [tlv] supported rates 1765 * [tlv] extended supported rates 1766 * [tlv] WME 1767 * [tlv] HT capabilities 1768 * [tlv] HT info 1769 */ 1770 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1771 ni = vap->iv_bss; 1772 capinfo = le16toh(*(uint16_t *)frm); 1773 frm += 2; 1774 status = le16toh(*(uint16_t *)frm); 1775 frm += 2; 1776 if (status != 0) { 1777 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1778 wh->i_addr2, "%sassoc failed (reason %d)", 1779 ISREASSOC(subtype) ? "re" : "", status); 1780 vap->iv_stats.is_rx_auth_fail++; /* XXX */ 1781 return; 1782 } 1783 associd = le16toh(*(uint16_t *)frm); 1784 frm += 2; 1785 1786 rates = xrates = wme = htcap = htinfo = NULL; 1787 vhtcap = vhtopmode = NULL; 1788 while (efrm - frm > 1) { 1789 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1790 switch (*frm) { 1791 case IEEE80211_ELEMID_RATES: 1792 rates = frm; 1793 break; 1794 case IEEE80211_ELEMID_XRATES: 1795 xrates = frm; 1796 break; 1797 case IEEE80211_ELEMID_HTCAP: 1798 htcap = frm; 1799 break; 1800 case IEEE80211_ELEMID_HTINFO: 1801 htinfo = frm; 1802 break; 1803 case IEEE80211_ELEMID_VENDOR: 1804 if (iswmeoui(frm)) 1805 wme = frm; 1806 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) { 1807 /* 1808 * Accept pre-draft HT ie's if the 1809 * standard ones have not been seen. 1810 */ 1811 if (ishtcapoui(frm)) { 1812 if (htcap == NULL) 1813 htcap = frm; 1814 } else if (ishtinfooui(frm)) { 1815 if (htinfo == NULL) 1816 htinfo = frm; 1817 } 1818 } 1819 /* XXX Atheros OUI support */ 1820 break; 1821 case IEEE80211_ELEMID_VHT_CAP: 1822 vhtcap = frm; 1823 break; 1824 case IEEE80211_ELEMID_VHT_OPMODE: 1825 vhtopmode = frm; 1826 break; 1827 } 1828 frm += frm[1] + 2; 1829 } 1830 1831 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1832 if (xrates != NULL) 1833 IEEE80211_VERIFY_ELEMENT(xrates, 1834 IEEE80211_RATE_MAXSIZE - rates[1], return); 1835 rate = ieee80211_setup_rates(ni, rates, xrates, 1836 IEEE80211_F_JOIN | 1837 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1838 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1839 if (rate & IEEE80211_RATE_BASIC) { 1840 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1841 wh->i_addr2, 1842 "%sassoc failed (rate set mismatch)", 1843 ISREASSOC(subtype) ? "re" : ""); 1844 vap->iv_stats.is_rx_assoc_norate++; 1845 ieee80211_new_state(vap, IEEE80211_S_SCAN, 1846 IEEE80211_SCAN_FAIL_STATUS); 1847 return; 1848 } 1849 1850 ni->ni_capinfo = capinfo; 1851 ni->ni_associd = associd; 1852 if (ni->ni_jointime == 0) 1853 ni->ni_jointime = time_uptime; 1854 if (wme != NULL && 1855 ieee80211_parse_wmeparams(vap, wme, wh, &qosinfo) >= 0) { 1856 ni->ni_flags |= IEEE80211_NODE_QOS; 1857 ieee80211_wme_updateparams(vap); 1858 } else 1859 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1860 /* 1861 * Setup HT state according to the negotiation. 1862 * 1863 * NB: shouldn't need to check if HT use is enabled but some 1864 * ap's send back HT ie's even when we don't indicate we 1865 * are HT capable in our AssocReq. 1866 */ 1867 if (htcap != NULL && htinfo != NULL && 1868 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1869 ieee80211_ht_node_init(ni); 1870 ieee80211_ht_updateparams(ni, htcap, htinfo); 1871 1872 if ((vhtcap != NULL) && (vhtopmode != NULL) & 1873 (vap->iv_flags_vht & IEEE80211_FVHT_VHT)) { 1874 /* 1875 * Log if we get a VHT assoc/reassoc response. 1876 * We aren't ready for 2GHz VHT support. 1877 */ 1878 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 1879 printf("%s: peer %6D: VHT on 2GHz, ignoring\n", 1880 __func__, 1881 ni->ni_macaddr, 1882 ":"); 1883 } else { 1884 ieee80211_vht_node_init(ni); 1885 ieee80211_vht_updateparams(ni, vhtcap, vhtopmode); 1886 ieee80211_setup_vht_rates(ni, vhtcap, vhtopmode); 1887 } 1888 } 1889 1890 ieee80211_ht_updateparams_final(ni, htcap, htinfo); 1891 ieee80211_setup_htrates(ni, htcap, 1892 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1893 ieee80211_setup_basic_htrates(ni, htinfo); 1894 1895 ieee80211_node_setuptxparms(ni); 1896 ieee80211_ratectl_node_init(ni); 1897 } 1898 1899 /* 1900 * Always initialise FF/superg state; we can use this 1901 * for doing A-MSDU encapsulation as well. 1902 */ 1903 #ifdef IEEE80211_SUPPORT_SUPERG 1904 ieee80211_ff_node_init(ni); 1905 #endif 1906 1907 /* 1908 * Configure state now that we are associated. 1909 * 1910 * XXX may need different/additional driver callbacks? 1911 */ 1912 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) || 1913 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1914 vap->iv_flags |= IEEE80211_F_SHPREAMBLE; 1915 vap->iv_flags &= ~IEEE80211_F_USEBARKER; 1916 } else { 1917 vap->iv_flags &= ~IEEE80211_F_SHPREAMBLE; 1918 vap->iv_flags |= IEEE80211_F_USEBARKER; 1919 } 1920 ieee80211_vap_set_shortslottime(vap, 1921 IEEE80211_IS_CHAN_A(ic->ic_curchan) || 1922 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1923 ieee80211_vap_update_preamble(vap); 1924 /* 1925 * Honor ERP protection. 1926 * 1927 * NB: ni_erp should zero for non-11g operation. 1928 */ 1929 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1930 (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) 1931 vap->iv_flags |= IEEE80211_F_USEPROT; 1932 else 1933 vap->iv_flags &= ~IEEE80211_F_USEPROT; 1934 ieee80211_vap_update_erp_protmode(vap); 1935 IEEE80211_NOTE_MAC(vap, 1936 IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, wh->i_addr2, 1937 "%sassoc success at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s%s", 1938 ISREASSOC(subtype) ? "re" : "", 1939 IEEE80211_NODE_AID(ni), 1940 vap->iv_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 1941 vap->iv_flags&IEEE80211_F_SHSLOT ? "short" : "long", 1942 vap->iv_flags&IEEE80211_F_USEPROT ? ", protection" : "", 1943 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 1944 ni->ni_flags & IEEE80211_NODE_HT ? 1945 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 1946 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 1947 ni->ni_flags & IEEE80211_NODE_AMSDU ? " (+AMSDU)" : "", 1948 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 1949 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 1950 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 1951 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 1952 ", fast-frames" : "", 1953 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 1954 ", turbo" : "" 1955 ); 1956 ieee80211_new_state(vap, IEEE80211_S_RUN, subtype); 1957 break; 1958 } 1959 1960 case IEEE80211_FC0_SUBTYPE_DEAUTH: { 1961 uint16_t reason; 1962 1963 if (vap->iv_state == IEEE80211_S_SCAN) { 1964 vap->iv_stats.is_rx_mgtdiscard++; 1965 return; 1966 } 1967 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 1968 /* NB: can happen when in promiscuous mode */ 1969 vap->iv_stats.is_rx_mgtdiscard++; 1970 break; 1971 } 1972 1973 /* 1974 * deauth frame format 1975 * [2] reason 1976 */ 1977 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 1978 reason = le16toh(*(uint16_t *)frm); 1979 1980 vap->iv_stats.is_rx_deauth++; 1981 vap->iv_stats.is_rx_deauth_code = reason; 1982 IEEE80211_NODE_STAT(ni, rx_deauth); 1983 1984 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 1985 "recv deauthenticate (reason: %d (%s))", reason, 1986 ieee80211_reason_to_string(reason)); 1987 ieee80211_new_state(vap, IEEE80211_S_AUTH, 1988 (reason << 8) | IEEE80211_FC0_SUBTYPE_DEAUTH); 1989 break; 1990 } 1991 1992 case IEEE80211_FC0_SUBTYPE_DISASSOC: { 1993 uint16_t reason; 1994 1995 if (vap->iv_state != IEEE80211_S_RUN && 1996 vap->iv_state != IEEE80211_S_ASSOC && 1997 vap->iv_state != IEEE80211_S_AUTH) { 1998 vap->iv_stats.is_rx_mgtdiscard++; 1999 return; 2000 } 2001 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 2002 /* NB: can happen when in promiscuous mode */ 2003 vap->iv_stats.is_rx_mgtdiscard++; 2004 break; 2005 } 2006 2007 /* 2008 * disassoc frame format 2009 * [2] reason 2010 */ 2011 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 2012 reason = le16toh(*(uint16_t *)frm); 2013 2014 vap->iv_stats.is_rx_disassoc++; 2015 vap->iv_stats.is_rx_disassoc_code = reason; 2016 IEEE80211_NODE_STAT(ni, rx_disassoc); 2017 2018 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2019 "recv disassociate (reason: %d (%s))", reason, 2020 ieee80211_reason_to_string(reason)); 2021 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 2022 break; 2023 } 2024 2025 case IEEE80211_FC0_SUBTYPE_ACTION: 2026 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 2027 if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 2028 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2029 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2030 wh, NULL, "%s", "not for us"); 2031 vap->iv_stats.is_rx_mgtdiscard++; 2032 } else if (vap->iv_state != IEEE80211_S_RUN) { 2033 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2034 wh, NULL, "wrong state %s", 2035 ieee80211_state_name[vap->iv_state]); 2036 vap->iv_stats.is_rx_mgtdiscard++; 2037 } else { 2038 if (ieee80211_parse_action(ni, m0) == 0) 2039 (void)ic->ic_recv_action(ni, wh, frm, efrm); 2040 } 2041 break; 2042 2043 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2044 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2045 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 2046 case IEEE80211_FC0_SUBTYPE_TIMING_ADV: 2047 case IEEE80211_FC0_SUBTYPE_ATIM: 2048 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2049 wh, NULL, "%s", "not handled"); 2050 vap->iv_stats.is_rx_mgtdiscard++; 2051 break; 2052 2053 default: 2054 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2055 wh, "mgt", "subtype 0x%x not handled", subtype); 2056 vap->iv_stats.is_rx_badsubtype++; 2057 break; 2058 } 2059 #undef ISREASSOC 2060 } 2061 2062 static void 2063 sta_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 2064 { 2065 switch (subtype) { 2066 case IEEE80211_FC0_SUBTYPE_BAR: 2067 ieee80211_recv_bar(ni, m); 2068 break; 2069 } 2070 } 2071