1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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/if_private.h> 58 #include <net/ethernet.h> 59 60 #include <net/bpf.h> 61 62 #include <net80211/ieee80211_var.h> 63 #include <net80211/ieee80211_sta.h> 64 #include <net80211/ieee80211_input.h> 65 #ifdef IEEE80211_SUPPORT_SUPERG 66 #include <net80211/ieee80211_superg.h> 67 #endif 68 #include <net80211/ieee80211_ratectl.h> 69 #include <net80211/ieee80211_sta.h> 70 #include <net80211/ieee80211_vht.h> 71 72 #define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2) 73 74 static void sta_vattach(struct ieee80211vap *); 75 static void sta_beacon_miss(struct ieee80211vap *); 76 static int sta_newstate(struct ieee80211vap *, enum ieee80211_state, int); 77 static int sta_input(struct ieee80211_node *, struct mbuf *, 78 const struct ieee80211_rx_stats *, int, int); 79 static void sta_recv_mgmt(struct ieee80211_node *, struct mbuf *, 80 int subtype, const struct ieee80211_rx_stats *, int rssi, int nf); 81 static void sta_recv_ctl(struct ieee80211_node *, struct mbuf *, int subtype); 82 83 void 84 ieee80211_sta_attach(struct ieee80211com *ic) 85 { 86 ic->ic_vattach[IEEE80211_M_STA] = sta_vattach; 87 } 88 89 void 90 ieee80211_sta_detach(struct ieee80211com *ic) 91 { 92 } 93 94 static void 95 sta_vdetach(struct ieee80211vap *vap) 96 { 97 } 98 99 static void 100 sta_vattach(struct ieee80211vap *vap) 101 { 102 vap->iv_newstate = sta_newstate; 103 vap->iv_input = sta_input; 104 vap->iv_recv_mgmt = sta_recv_mgmt; 105 vap->iv_recv_ctl = sta_recv_ctl; 106 vap->iv_opdetach = sta_vdetach; 107 vap->iv_bmiss = sta_beacon_miss; 108 } 109 110 /* 111 * Handle a beacon miss event. The common code filters out 112 * spurious events that can happen when scanning and/or before 113 * reaching RUN state. 114 */ 115 static void 116 sta_beacon_miss(struct ieee80211vap *vap) 117 { 118 struct ieee80211com *ic = vap->iv_ic; 119 120 IEEE80211_LOCK_ASSERT(ic); 121 122 KASSERT((ic->ic_flags & IEEE80211_F_SCAN) == 0, ("scanning")); 123 KASSERT(vap->iv_state >= IEEE80211_S_RUN, 124 ("wrong state %s", ieee80211_state_name[vap->iv_state])); 125 126 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 127 "beacon miss, mode %s state %s\n", 128 ieee80211_opmode_name[vap->iv_opmode], 129 ieee80211_state_name[vap->iv_state]); 130 131 if (vap->iv_state == IEEE80211_S_CSA) { 132 /* 133 * A Channel Switch is pending; assume we missed the 134 * beacon that would've completed the process and just 135 * force the switch. If we made a mistake we'll not 136 * find the AP on the new channel and fall back to a 137 * normal scan. 138 */ 139 ieee80211_csa_completeswitch(ic); 140 return; 141 } 142 if (++vap->iv_bmiss_count < vap->iv_bmiss_max) { 143 /* 144 * Send a directed probe req before falling back to a 145 * scan; if we receive a response ic_bmiss_count will 146 * be reset. Some cards mistakenly report beacon miss 147 * so this avoids the expensive scan if the ap is 148 * still there. 149 */ 150 ieee80211_send_probereq(vap->iv_bss, vap->iv_myaddr, 151 vap->iv_bss->ni_bssid, vap->iv_bss->ni_bssid, 152 vap->iv_bss->ni_essid, vap->iv_bss->ni_esslen); 153 return; 154 } 155 156 callout_stop(&vap->iv_swbmiss); 157 vap->iv_bmiss_count = 0; 158 vap->iv_stats.is_beacon_miss++; 159 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 160 #ifdef IEEE80211_SUPPORT_SUPERG 161 162 /* 163 * If we receive a beacon miss interrupt when using 164 * dynamic turbo, attempt to switch modes before 165 * reassociating. 166 */ 167 if (IEEE80211_ATH_CAP(vap, vap->iv_bss, IEEE80211_NODE_TURBOP)) 168 ieee80211_dturbo_switch(vap, 169 ic->ic_bsschan->ic_flags ^ IEEE80211_CHAN_TURBO); 170 #endif 171 /* 172 * Try to reassociate before scanning for a new ap. 173 */ 174 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 175 } else { 176 /* 177 * Somebody else is controlling state changes (e.g. 178 * a user-mode app) don't do anything that would 179 * confuse them; just drop into scan mode so they'll 180 * notified of the state change and given control. 181 */ 182 ieee80211_new_state(vap, IEEE80211_S_SCAN, 0); 183 } 184 } 185 186 /* 187 * Handle deauth with reason. We retry only for 188 * the cases where we might succeed. Otherwise 189 * we downgrade the ap and scan. 190 */ 191 static void 192 sta_authretry(struct ieee80211vap *vap, struct ieee80211_node *ni, int reason) 193 { 194 switch (reason) { 195 case IEEE80211_STATUS_SUCCESS: /* NB: MLME assoc */ 196 case IEEE80211_STATUS_TIMEOUT: 197 case IEEE80211_REASON_ASSOC_EXPIRE: 198 case IEEE80211_REASON_NOT_AUTHED: 199 case IEEE80211_REASON_NOT_ASSOCED: 200 case IEEE80211_REASON_ASSOC_LEAVE: 201 case IEEE80211_REASON_ASSOC_NOT_AUTHED: 202 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, 1); 203 break; 204 default: 205 ieee80211_scan_assoc_fail(vap, vap->iv_bss->ni_macaddr, reason); 206 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 207 ieee80211_check_scan_current(vap); 208 break; 209 } 210 } 211 212 static void 213 sta_swbmiss_start(struct ieee80211vap *vap) 214 { 215 216 if (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS) { 217 /* 218 * Start s/w beacon miss timer for devices w/o 219 * hardware support. We fudge a bit here since 220 * we're doing this in software. 221 */ 222 vap->iv_swbmiss_period = IEEE80211_TU_TO_TICKS( 223 2 * vap->iv_bmissthreshold * vap->iv_bss->ni_intval); 224 vap->iv_swbmiss_count = 0; 225 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, 226 ieee80211_swbmiss, vap); 227 } 228 } 229 230 /* 231 * IEEE80211_M_STA vap state machine handler. 232 * This routine handles the main states in the 802.11 protocol. 233 */ 234 static int 235 sta_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 236 { 237 struct ieee80211com *ic = vap->iv_ic; 238 struct ieee80211_node *ni; 239 enum ieee80211_state ostate; 240 241 IEEE80211_LOCK_ASSERT(ic); 242 243 ostate = vap->iv_state; 244 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 245 __func__, ieee80211_state_name[ostate], 246 ieee80211_state_name[nstate], arg); 247 vap->iv_state = nstate; /* state transition */ 248 callout_stop(&vap->iv_mgtsend); /* XXX callout_drain */ 249 if (ostate != IEEE80211_S_SCAN) 250 ieee80211_cancel_scan(vap); /* background scan */ 251 ni = vap->iv_bss; /* NB: no reference held */ 252 if (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS) 253 callout_stop(&vap->iv_swbmiss); 254 switch (nstate) { 255 case IEEE80211_S_INIT: 256 switch (ostate) { 257 case IEEE80211_S_SLEEP: 258 /* XXX wakeup */ 259 /* XXX driver hook to wakeup the hardware? */ 260 case IEEE80211_S_RUN: 261 IEEE80211_SEND_MGMT(ni, 262 IEEE80211_FC0_SUBTYPE_DISASSOC, 263 IEEE80211_REASON_ASSOC_LEAVE); 264 ieee80211_sta_leave(ni); 265 break; 266 case IEEE80211_S_ASSOC: 267 IEEE80211_SEND_MGMT(ni, 268 IEEE80211_FC0_SUBTYPE_DEAUTH, 269 IEEE80211_REASON_AUTH_LEAVE); 270 break; 271 case IEEE80211_S_SCAN: 272 ieee80211_cancel_scan(vap); 273 break; 274 default: 275 break; 276 } 277 if (ostate != IEEE80211_S_INIT) { 278 /* NB: optimize INIT -> INIT case */ 279 ieee80211_reset_bss(vap); 280 } 281 if (vap->iv_auth->ia_detach != NULL) 282 vap->iv_auth->ia_detach(vap); 283 break; 284 case IEEE80211_S_SCAN: 285 switch (ostate) { 286 case IEEE80211_S_INIT: 287 /* 288 * Initiate a scan. We can come here as a result 289 * of an IEEE80211_IOC_SCAN_REQ too in which case 290 * the vap will be marked with IEEE80211_FEXT_SCANREQ 291 * and the scan request parameters will be present 292 * in iv_scanreq. Otherwise we do the default. 293 */ 294 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 295 ieee80211_check_scan(vap, 296 vap->iv_scanreq_flags, 297 vap->iv_scanreq_duration, 298 vap->iv_scanreq_mindwell, 299 vap->iv_scanreq_maxdwell, 300 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 301 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 302 } else 303 ieee80211_check_scan_current(vap); 304 break; 305 case IEEE80211_S_SCAN: 306 case IEEE80211_S_AUTH: 307 case IEEE80211_S_ASSOC: 308 /* 309 * These can happen either because of a timeout 310 * on an assoc/auth response or because of a 311 * change in state that requires a reset. For 312 * the former we're called with a non-zero arg 313 * that is the cause for the failure; pass this 314 * to the scan code so it can update state. 315 * Otherwise trigger a new scan unless we're in 316 * manual roaming mode in which case an application 317 * must issue an explicit scan request. 318 */ 319 if (arg != 0) 320 ieee80211_scan_assoc_fail(vap, 321 vap->iv_bss->ni_macaddr, arg); 322 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 323 ieee80211_check_scan_current(vap); 324 break; 325 case IEEE80211_S_SLEEP: /* beacon miss */ 326 /* 327 * XXX if in sleep we need to wakeup the hardware. 328 */ 329 /* FALLTHROUGH */ 330 case IEEE80211_S_RUN: /* beacon miss */ 331 /* 332 * Beacon miss. Notify user space and if not 333 * under control of a user application (roaming 334 * manual) kick off a scan to re-connect. 335 */ 336 337 ieee80211_sta_leave(ni); 338 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 339 ieee80211_check_scan_current(vap); 340 break; 341 default: 342 goto invalid; 343 } 344 break; 345 case IEEE80211_S_AUTH: 346 switch (ostate) { 347 case IEEE80211_S_INIT: 348 case IEEE80211_S_SCAN: 349 IEEE80211_SEND_MGMT(ni, 350 IEEE80211_FC0_SUBTYPE_AUTH, 1); 351 break; 352 case IEEE80211_S_AUTH: 353 case IEEE80211_S_ASSOC: 354 switch (arg & 0xff) { 355 case IEEE80211_FC0_SUBTYPE_AUTH: 356 /* ??? */ 357 IEEE80211_SEND_MGMT(ni, 358 IEEE80211_FC0_SUBTYPE_AUTH, 2); 359 break; 360 case IEEE80211_FC0_SUBTYPE_DEAUTH: 361 sta_authretry(vap, ni, arg>>8); 362 break; 363 } 364 break; 365 case IEEE80211_S_SLEEP: 366 case IEEE80211_S_RUN: 367 switch (arg & 0xff) { 368 case IEEE80211_FC0_SUBTYPE_AUTH: 369 IEEE80211_SEND_MGMT(ni, 370 IEEE80211_FC0_SUBTYPE_AUTH, 2); 371 vap->iv_state = IEEE80211_S_RUN; /* stay RUN */ 372 break; 373 case IEEE80211_FC0_SUBTYPE_DEAUTH: 374 ieee80211_sta_leave(ni); 375 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 376 /* try to reauth */ 377 IEEE80211_SEND_MGMT(ni, 378 IEEE80211_FC0_SUBTYPE_AUTH, 1); 379 } 380 break; 381 } 382 break; 383 default: 384 goto invalid; 385 } 386 break; 387 case IEEE80211_S_ASSOC: 388 switch (ostate) { 389 case IEEE80211_S_AUTH: 390 case IEEE80211_S_ASSOC: 391 IEEE80211_SEND_MGMT(ni, 392 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 393 break; 394 case IEEE80211_S_SLEEP: /* cannot happen */ 395 case IEEE80211_S_RUN: 396 ieee80211_sta_leave(ni); 397 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 398 IEEE80211_SEND_MGMT(ni, arg ? 399 IEEE80211_FC0_SUBTYPE_REASSOC_REQ : 400 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 401 } 402 break; 403 default: 404 goto invalid; 405 } 406 break; 407 case IEEE80211_S_RUN: 408 if (vap->iv_flags & IEEE80211_F_WPA) { 409 /* XXX validate prerequisites */ 410 } 411 switch (ostate) { 412 case IEEE80211_S_RUN: 413 case IEEE80211_S_CSA: 414 break; 415 case IEEE80211_S_AUTH: /* when join is done in fw */ 416 case IEEE80211_S_ASSOC: 417 #ifdef IEEE80211_DEBUG 418 if (ieee80211_msg_debug(vap)) { 419 ieee80211_note(vap, "%s with %s ssid ", 420 (vap->iv_opmode == IEEE80211_M_STA ? 421 "associated" : "synchronized"), 422 ether_sprintf(ni->ni_bssid)); 423 ieee80211_print_essid(vap->iv_bss->ni_essid, 424 ni->ni_esslen); 425 /* XXX MCS/HT */ 426 printf(" channel %d start %uMb\n", 427 ieee80211_chan2ieee(ic, ic->ic_curchan), 428 IEEE80211_RATE2MBS(ni->ni_txrate)); 429 } 430 #endif 431 ieee80211_scan_assoc_success(vap, ni->ni_macaddr); 432 ieee80211_notify_node_join(ni, 433 arg == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 434 break; 435 case IEEE80211_S_SLEEP: 436 /* Wake up from sleep */ 437 vap->iv_sta_ps(vap, 0); 438 break; 439 default: 440 goto invalid; 441 } 442 ieee80211_sync_curchan(ic); 443 if (ostate != IEEE80211_S_RUN) 444 sta_swbmiss_start(vap); 445 /* 446 * When 802.1x is not in use mark the port authorized 447 * at this point so traffic can flow. 448 */ 449 if (ni->ni_authmode != IEEE80211_AUTH_8021X) 450 ieee80211_node_authorize(ni); 451 /* 452 * Fake association when joining an existing bss. 453 * 454 * Don't do this if we're doing SLEEP->RUN. 455 */ 456 if (ic->ic_newassoc != NULL && ostate != IEEE80211_S_SLEEP) 457 ic->ic_newassoc(vap->iv_bss, (ostate != IEEE80211_S_RUN)); 458 break; 459 case IEEE80211_S_CSA: 460 if (ostate != IEEE80211_S_RUN) 461 goto invalid; 462 break; 463 case IEEE80211_S_SLEEP: 464 sta_swbmiss_start(vap); 465 vap->iv_sta_ps(vap, 1); 466 break; 467 default: 468 invalid: 469 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 470 "%s: unexpected state transition %s -> %s\n", __func__, 471 ieee80211_state_name[ostate], ieee80211_state_name[nstate]); 472 break; 473 } 474 return 0; 475 } 476 477 /* 478 * Return non-zero if the frame is an echo of a multicast 479 * frame sent by ourself. The dir is known to be DSTODS. 480 */ 481 static __inline int 482 isdstods_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh) 483 { 484 #define QWH4(wh) ((const struct ieee80211_qosframe_addr4 *)wh) 485 #define WH4(wh) ((const struct ieee80211_frame_addr4 *)wh) 486 const uint8_t *sa; 487 488 KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode")); 489 490 if (!IEEE80211_IS_MULTICAST(wh->i_addr3)) 491 return 0; 492 sa = IEEE80211_QOS_HAS_SEQ(wh) ? QWH4(wh)->i_addr4 : WH4(wh)->i_addr4; 493 return IEEE80211_ADDR_EQ(sa, vap->iv_myaddr); 494 #undef WH4 495 #undef QWH4 496 } 497 498 /* 499 * Return non-zero if the frame is an echo of a multicast 500 * frame sent by ourself. The dir is known to be FROMDS. 501 */ 502 static __inline int 503 isfromds_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh) 504 { 505 KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode")); 506 507 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) 508 return 0; 509 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 510 } 511 512 /* 513 * Decide if a received management frame should be 514 * printed when debugging is enabled. This filters some 515 * of the less interesting frames that come frequently 516 * (e.g. beacons). 517 */ 518 static __inline int 519 doprint(struct ieee80211vap *vap, int subtype) 520 { 521 switch (subtype) { 522 case IEEE80211_FC0_SUBTYPE_BEACON: 523 return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN); 524 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 525 return 0; 526 } 527 return 1; 528 } 529 530 /* 531 * Process a received frame. The node associated with the sender 532 * should be supplied. If nothing was found in the node table then 533 * the caller is assumed to supply a reference to iv_bss instead. 534 * The RSSI and a timestamp are also supplied. The RSSI data is used 535 * during AP scanning to select a AP to associate with; it can have 536 * any units so long as values have consistent units and higher values 537 * mean ``better signal''. The receive timestamp is currently not used 538 * by the 802.11 layer. 539 */ 540 static int 541 sta_input(struct ieee80211_node *ni, struct mbuf *m, 542 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 543 { 544 struct ieee80211vap *vap = ni->ni_vap; 545 struct ieee80211com *ic = ni->ni_ic; 546 struct ifnet *ifp = vap->iv_ifp; 547 struct ieee80211_frame *wh; 548 struct ieee80211_key *key; 549 struct ether_header *eh; 550 int hdrspace, need_tap = 1; /* mbuf need to be tapped. */ 551 uint8_t dir, type, subtype, qos; 552 uint8_t *bssid; 553 int is_hw_decrypted = 0; 554 int has_decrypted = 0; 555 556 KASSERT(ni != NULL, ("%s: null node, mbuf %p", __func__, m)); 557 558 /* Early init in case of early error case. */ 559 type = -1; 560 561 /* 562 * Bit of a cheat here, we use a pointer for a 3-address 563 * frame format but don't reference fields past outside 564 * ieee80211_frame_min (or other shorter frames) w/o first 565 * validating the data is present. 566 */ 567 wh = mtod(m, struct ieee80211_frame *); 568 569 if (m->m_pkthdr.len < 2 || m->m_pkthdr.len < ieee80211_anyhdrsize(wh)) { 570 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 571 ni->ni_macaddr, NULL, 572 "too short (1): len %u", m->m_pkthdr.len); 573 vap->iv_stats.is_rx_tooshort++; 574 goto err; 575 } 576 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 577 IEEE80211_FC0_VERSION_0) { 578 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 579 ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x", 580 wh->i_fc[0], wh->i_fc[1]); 581 vap->iv_stats.is_rx_badversion++; 582 goto err; 583 } 584 585 /* 586 * Some devices do hardware decryption all the way through 587 * to pretending the frame wasn't encrypted in the first place. 588 * So, tag it appropriately so it isn't discarded inappropriately. 589 */ 590 if ((rxs != NULL) && (rxs->c_pktflags & IEEE80211_RX_F_DECRYPTED)) 591 is_hw_decrypted = 1; 592 593 if (m->m_flags & M_AMPDU_MPDU) { 594 /* 595 * Fastpath for A-MPDU reorder q resubmission. Frames 596 * w/ M_AMPDU_MPDU marked have already passed through 597 * here but were received out of order and been held on 598 * the reorder queue. When resubmitted they are marked 599 * with the M_AMPDU_MPDU flag and we can bypass most of 600 * the normal processing. 601 */ 602 type = IEEE80211_FC0_TYPE_DATA; 603 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 604 subtype = IEEE80211_FC0_SUBTYPE_QOS_DATA; 605 hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ 606 goto resubmit_ampdu; 607 } 608 609 ni->ni_inact = ni->ni_inact_reload; 610 611 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 612 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 613 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 614 /* 615 * Control frames are not folowing the header scheme of data and mgmt 616 * frames so we do not apply extra checks here. 617 * We probably should do checks on RA (+TA) where available for those 618 * too, but for now do not drop them. 619 */ 620 if (type != IEEE80211_FC0_TYPE_CTL && 621 (ic->ic_flags & IEEE80211_F_SCAN) == 0) { 622 bssid = wh->i_addr2; 623 if (!IEEE80211_ADDR_EQ(bssid, ni->ni_bssid)) { 624 /* not interested in */ 625 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 626 bssid, NULL, "%s", "not to bss"); 627 vap->iv_stats.is_rx_wrongbss++; 628 goto out; 629 } 630 631 /* 632 * Some devices may be in a promiscuous mode 633 * where they receive frames for multiple station 634 * addresses. 635 * 636 * If we receive a data frame that isn't 637 * destined to our VAP MAC, drop it. 638 * 639 * XXX TODO: This is only enforced when not scanning; 640 * XXX it assumes a software-driven scan will put the NIC 641 * XXX into a "no data frames" mode before setting this 642 * XXX flag. Otherwise it may be possible that we'll still 643 * XXX process data frames whilst scanning. 644 */ 645 if ((! IEEE80211_IS_MULTICAST(wh->i_addr1)) 646 && (! IEEE80211_ADDR_EQ(wh->i_addr1, IF_LLADDR(ifp)))) { 647 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 648 bssid, NULL, "not to cur sta: lladdr=%6D, addr1=%6D", 649 IF_LLADDR(ifp), ":", wh->i_addr1, ":"); 650 vap->iv_stats.is_rx_wrongbss++; 651 goto out; 652 } 653 654 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 655 ni->ni_noise = nf; 656 if ( IEEE80211_HAS_SEQ(type, subtype) && 657 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 658 uint8_t tid = ieee80211_gettid(wh); 659 if (IEEE80211_QOS_HAS_SEQ(wh) && 660 TID_TO_WME_AC(tid) >= WME_AC_VI) 661 ic->ic_wme.wme_hipri_traffic++; 662 if (! ieee80211_check_rxseq(ni, wh, bssid, rxs)) 663 goto out; 664 } 665 } 666 667 switch (type) { 668 case IEEE80211_FC0_TYPE_DATA: 669 hdrspace = ieee80211_hdrspace(ic, wh); 670 if (m->m_len < hdrspace && 671 (m = m_pullup(m, hdrspace)) == NULL) { 672 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 673 ni->ni_macaddr, NULL, 674 "data too short: expecting %u", hdrspace); 675 vap->iv_stats.is_rx_tooshort++; 676 goto out; /* XXX */ 677 } 678 /* 679 * Handle A-MPDU re-ordering. If the frame is to be 680 * processed directly then ieee80211_ampdu_reorder 681 * will return 0; otherwise it has consumed the mbuf 682 * and we should do nothing more with it. 683 */ 684 if ((m->m_flags & M_AMPDU) && 685 (dir == IEEE80211_FC1_DIR_FROMDS || 686 dir == IEEE80211_FC1_DIR_DSTODS) && 687 ieee80211_ampdu_reorder(ni, m, rxs) != 0) { 688 m = NULL; 689 goto out; 690 } 691 resubmit_ampdu: 692 if (dir == IEEE80211_FC1_DIR_FROMDS) { 693 if ((ifp->if_flags & IFF_SIMPLEX) && 694 isfromds_mcastecho(vap, wh)) { 695 /* 696 * In IEEE802.11 network, multicast 697 * packets sent from "me" are broadcast 698 * from the AP; silently discard for 699 * SIMPLEX interface. 700 */ 701 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 702 wh, "data", "%s", "multicast echo"); 703 vap->iv_stats.is_rx_mcastecho++; 704 goto out; 705 } 706 if ((vap->iv_flags & IEEE80211_F_DWDS) && 707 IEEE80211_IS_MULTICAST(wh->i_addr1)) { 708 /* 709 * DWDS sta's must drop 3-address mcast frames 710 * as they will be sent separately as a 4-addr 711 * frame. Accepting the 3-addr frame will 712 * confuse the bridge into thinking the sending 713 * sta is located at the end of WDS link. 714 */ 715 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 716 "3-address data", "%s", "DWDS enabled"); 717 vap->iv_stats.is_rx_mcastecho++; 718 goto out; 719 } 720 } else if (dir == IEEE80211_FC1_DIR_DSTODS) { 721 if ((vap->iv_flags & IEEE80211_F_DWDS) == 0) { 722 IEEE80211_DISCARD(vap, 723 IEEE80211_MSG_INPUT, wh, "4-address data", 724 "%s", "DWDS not enabled"); 725 vap->iv_stats.is_rx_wrongdir++; 726 goto out; 727 } 728 if ((ifp->if_flags & IFF_SIMPLEX) && 729 isdstods_mcastecho(vap, wh)) { 730 /* 731 * In IEEE802.11 network, multicast 732 * packets sent from "me" are broadcast 733 * from the AP; silently discard for 734 * SIMPLEX interface. 735 */ 736 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 737 "4-address data", "%s", "multicast echo"); 738 vap->iv_stats.is_rx_mcastecho++; 739 goto out; 740 } 741 } else { 742 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 743 "data", "incorrect dir 0x%x", dir); 744 vap->iv_stats.is_rx_wrongdir++; 745 goto out; 746 } 747 748 /* 749 * Handle privacy requirements for hardware decryption 750 * devices. 751 * 752 * For those devices, a handful of things happen. 753 * 754 * + If IV has been stripped, then we can't run 755 * ieee80211_crypto_decap() - none of the key 756 * + If MIC has been stripped, we can't validate 757 * MIC here. 758 * + If MIC fails, then we need to communicate a 759 * MIC failure up to the stack - but we don't know 760 * which key was used. 761 */ 762 763 /* 764 * Handle privacy requirements. Note that we 765 * must not be preempted from here until after 766 * we (potentially) call ieee80211_crypto_demic; 767 * otherwise we may violate assumptions in the 768 * crypto cipher modules used to do delayed update 769 * of replay sequence numbers. 770 */ 771 if (is_hw_decrypted || IEEE80211_IS_PROTECTED(wh)) { 772 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 773 /* 774 * Discard encrypted frames when privacy is off. 775 */ 776 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 777 wh, "WEP", "%s", "PRIVACY off"); 778 vap->iv_stats.is_rx_noprivacy++; 779 IEEE80211_NODE_STAT(ni, rx_noprivacy); 780 goto out; 781 } 782 if (ieee80211_crypto_decap(ni, m, hdrspace, &key) == 0) { 783 /* NB: stats+msgs handled in crypto_decap */ 784 IEEE80211_NODE_STAT(ni, rx_wepfail); 785 goto out; 786 } 787 wh = mtod(m, struct ieee80211_frame *); 788 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 789 has_decrypted = 1; 790 } else { 791 /* XXX M_WEP and IEEE80211_F_PRIVACY */ 792 key = NULL; 793 } 794 795 /* 796 * Save QoS bits for use below--before we strip the header. 797 */ 798 if (subtype == IEEE80211_FC0_SUBTYPE_QOS_DATA) 799 qos = ieee80211_getqos(wh)[0]; 800 else 801 qos = 0; 802 803 /* 804 * Next up, any fragmentation. 805 */ 806 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 807 m = ieee80211_defrag(ni, m, hdrspace, has_decrypted); 808 if (m == NULL) { 809 /* Fragment dropped or frame not complete yet */ 810 goto out; 811 } 812 } 813 wh = NULL; /* no longer valid, catch any uses */ 814 815 /* 816 * Next strip any MSDU crypto bits. 817 * 818 * Note: we can't do MIC stripping/verification if the 819 * upper layer has stripped it. We have to check MIC 820 * ourselves. So, key may be NULL, but we have to check 821 * the RX status. 822 */ 823 if (!ieee80211_crypto_demic(vap, key, m, 0)) { 824 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 825 ni->ni_macaddr, "data", "%s", "demic error"); 826 vap->iv_stats.is_rx_demicfail++; 827 IEEE80211_NODE_STAT(ni, rx_demicfail); 828 goto out; 829 } 830 831 /* copy to listener after decrypt */ 832 if (ieee80211_radiotap_active_vap(vap)) 833 ieee80211_radiotap_rx(vap, m); 834 need_tap = 0; 835 836 /* 837 * Finally, strip the 802.11 header. 838 */ 839 m = ieee80211_decap(vap, m, hdrspace, qos); 840 if (m == NULL) { 841 /* XXX mask bit to check for both */ 842 /* don't count Null data frames as errors */ 843 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 844 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 845 goto out; 846 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 847 ni->ni_macaddr, "data", "%s", "decap error"); 848 vap->iv_stats.is_rx_decap++; 849 IEEE80211_NODE_STAT(ni, rx_decap); 850 goto err; 851 } 852 if (!(qos & IEEE80211_QOS_AMSDU)) 853 eh = mtod(m, struct ether_header *); 854 else 855 eh = NULL; 856 if (!ieee80211_node_is_authorized(ni)) { 857 /* 858 * Deny any non-PAE frames received prior to 859 * authorization. For open/shared-key 860 * authentication the port is mark authorized 861 * after authentication completes. For 802.1x 862 * the port is not marked authorized by the 863 * authenticator until the handshake has completed. 864 */ 865 if (eh == NULL || 866 eh->ether_type != htons(ETHERTYPE_PAE)) { 867 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 868 ni->ni_macaddr, "data", "unauthorized or " 869 "unknown port: ether type 0x%x len %u", 870 eh == NULL ? -1 : eh->ether_type, 871 m->m_pkthdr.len); 872 vap->iv_stats.is_rx_unauth++; 873 IEEE80211_NODE_STAT(ni, rx_unauth); 874 goto err; 875 } 876 } else { 877 /* 878 * When denying unencrypted frames, discard 879 * any non-PAE frames received without encryption. 880 */ 881 if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && 882 ((has_decrypted == 0) && (m->m_flags & M_WEP) == 0) && 883 (is_hw_decrypted == 0) && 884 (eh == NULL || 885 eh->ether_type != htons(ETHERTYPE_PAE))) { 886 /* 887 * Drop unencrypted frames. 888 */ 889 vap->iv_stats.is_rx_unencrypted++; 890 IEEE80211_NODE_STAT(ni, rx_unencrypted); 891 goto out; 892 } 893 } 894 /* XXX require HT? */ 895 if (qos & IEEE80211_QOS_AMSDU) { 896 m = ieee80211_decap_amsdu(ni, m); 897 if (m == NULL) 898 return IEEE80211_FC0_TYPE_DATA; 899 } else { 900 #ifdef IEEE80211_SUPPORT_SUPERG 901 m = ieee80211_decap_fastframe(vap, ni, m); 902 if (m == NULL) 903 return IEEE80211_FC0_TYPE_DATA; 904 #endif 905 } 906 ieee80211_deliver_data(vap, ni, m); 907 return IEEE80211_FC0_TYPE_DATA; 908 909 case IEEE80211_FC0_TYPE_MGT: 910 vap->iv_stats.is_rx_mgmt++; 911 IEEE80211_NODE_STAT(ni, rx_mgmt); 912 if (dir != IEEE80211_FC1_DIR_NODS) { 913 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 914 wh, "data", "incorrect dir 0x%x", dir); 915 vap->iv_stats.is_rx_wrongdir++; 916 goto err; 917 } 918 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 919 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 920 ni->ni_macaddr, "mgt", "too short: len %u", 921 m->m_pkthdr.len); 922 vap->iv_stats.is_rx_tooshort++; 923 goto out; 924 } 925 #ifdef IEEE80211_DEBUG 926 if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) || 927 ieee80211_msg_dumppkts(vap)) { 928 if_printf(ifp, "received %s from %s rssi %d\n", 929 ieee80211_mgt_subtype_name(subtype), 930 ether_sprintf(wh->i_addr2), rssi); 931 } 932 #endif 933 934 /* 935 * Note: See above for hardware offload privacy requirements. 936 * It also applies here. 937 */ 938 939 /* 940 * Again, having encrypted flag set check would be good, but 941 * then we have to also handle crypto_decap() like above. 942 */ 943 if (IEEE80211_IS_PROTECTED(wh)) { 944 if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) { 945 /* 946 * Only shared key auth frames with a challenge 947 * should be encrypted, discard all others. 948 */ 949 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 950 wh, ieee80211_mgt_subtype_name(subtype), 951 "%s", "WEP set but not permitted"); 952 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 953 goto out; 954 } 955 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 956 /* 957 * Discard encrypted frames when privacy is off. 958 */ 959 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 960 wh, "mgt", "%s", "WEP set but PRIVACY off"); 961 vap->iv_stats.is_rx_noprivacy++; 962 goto out; 963 } 964 hdrspace = ieee80211_hdrspace(ic, wh); 965 966 /* 967 * Again, if IV/MIC was stripped, then this whole 968 * setup will fail. That's going to need some poking. 969 */ 970 if (ieee80211_crypto_decap(ni, m, hdrspace, &key) == 0) { 971 /* NB: stats+msgs handled in crypto_decap */ 972 goto out; 973 } 974 has_decrypted = 1; 975 wh = mtod(m, struct ieee80211_frame *); 976 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 977 } 978 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); 979 goto out; 980 981 case IEEE80211_FC0_TYPE_CTL: 982 vap->iv_stats.is_rx_ctl++; 983 IEEE80211_NODE_STAT(ni, rx_ctrl); 984 vap->iv_recv_ctl(ni, m, subtype); 985 goto out; 986 987 default: 988 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 989 wh, NULL, "bad frame type 0x%x", type); 990 /* should not come here */ 991 break; 992 } 993 err: 994 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 995 out: 996 if (m != NULL) { 997 if (need_tap && ieee80211_radiotap_active_vap(vap)) 998 ieee80211_radiotap_rx(vap, m); 999 m_freem(m); 1000 } 1001 return type; 1002 } 1003 1004 static void 1005 sta_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh, 1006 int rssi, int nf, uint16_t seq, uint16_t status) 1007 { 1008 struct ieee80211vap *vap = ni->ni_vap; 1009 1010 if (ni->ni_authmode == IEEE80211_AUTH_SHARED) { 1011 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1012 ni->ni_macaddr, "open auth", 1013 "bad sta auth mode %u", ni->ni_authmode); 1014 vap->iv_stats.is_rx_bad_auth++; /* XXX */ 1015 return; 1016 } 1017 if (vap->iv_state != IEEE80211_S_AUTH || 1018 seq != IEEE80211_AUTH_OPEN_RESPONSE) { 1019 vap->iv_stats.is_rx_bad_auth++; 1020 return; 1021 } 1022 if (status != 0) { 1023 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 1024 ni, "open auth failed (reason %d)", status); 1025 vap->iv_stats.is_rx_auth_fail++; 1026 vap->iv_stats.is_rx_authfail_code = status; 1027 ieee80211_new_state(vap, IEEE80211_S_SCAN, 1028 IEEE80211_SCAN_FAIL_STATUS); 1029 } else 1030 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 1031 } 1032 1033 static void 1034 sta_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh, 1035 uint8_t *frm, uint8_t *efrm, int rssi, int nf, 1036 uint16_t seq, uint16_t status) 1037 { 1038 struct ieee80211vap *vap = ni->ni_vap; 1039 uint8_t *challenge; 1040 1041 /* 1042 * NB: this can happen as we allow pre-shared key 1043 * authentication to be enabled w/o wep being turned 1044 * on so that configuration of these can be done 1045 * in any order. It may be better to enforce the 1046 * ordering in which case this check would just be 1047 * for sanity/consistency. 1048 */ 1049 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 1050 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1051 ni->ni_macaddr, "shared key auth", 1052 "%s", " PRIVACY is disabled"); 1053 goto bad; 1054 } 1055 /* 1056 * Pre-shared key authentication is evil; accept 1057 * it only if explicitly configured (it is supported 1058 * mainly for compatibility with clients like OS X). 1059 */ 1060 if (ni->ni_authmode != IEEE80211_AUTH_AUTO && 1061 ni->ni_authmode != IEEE80211_AUTH_SHARED) { 1062 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1063 ni->ni_macaddr, "shared key auth", 1064 "bad sta auth mode %u", ni->ni_authmode); 1065 vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */ 1066 goto bad; 1067 } 1068 1069 challenge = NULL; 1070 if (frm + 1 < efrm) { 1071 if ((frm[1] + 2) > (efrm - frm)) { 1072 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1073 ni->ni_macaddr, "shared key auth", 1074 "ie %d/%d too long", 1075 frm[0], (frm[1] + 2) - (efrm - frm)); 1076 vap->iv_stats.is_rx_bad_auth++; 1077 goto bad; 1078 } 1079 if (*frm == IEEE80211_ELEMID_CHALLENGE) 1080 challenge = frm; 1081 frm += frm[1] + 2; 1082 } 1083 switch (seq) { 1084 case IEEE80211_AUTH_SHARED_CHALLENGE: 1085 case IEEE80211_AUTH_SHARED_RESPONSE: 1086 if (challenge == NULL) { 1087 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1088 ni->ni_macaddr, "shared key auth", 1089 "%s", "no challenge"); 1090 vap->iv_stats.is_rx_bad_auth++; 1091 goto bad; 1092 } 1093 if (challenge[1] != IEEE80211_CHALLENGE_LEN) { 1094 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1095 ni->ni_macaddr, "shared key auth", 1096 "bad challenge len %d", challenge[1]); 1097 vap->iv_stats.is_rx_bad_auth++; 1098 goto bad; 1099 } 1100 default: 1101 break; 1102 } 1103 if (vap->iv_state != IEEE80211_S_AUTH) 1104 return; 1105 switch (seq) { 1106 case IEEE80211_AUTH_SHARED_PASS: 1107 if (ni->ni_challenge != NULL) { 1108 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 1109 ni->ni_challenge = NULL; 1110 } 1111 if (status != 0) { 1112 IEEE80211_NOTE_FRAME(vap, 1113 IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, wh, 1114 "shared key auth failed (reason %d)", status); 1115 vap->iv_stats.is_rx_auth_fail++; 1116 vap->iv_stats.is_rx_authfail_code = status; 1117 return; 1118 } 1119 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 1120 break; 1121 case IEEE80211_AUTH_SHARED_CHALLENGE: 1122 if (!ieee80211_alloc_challenge(ni)) 1123 return; 1124 /* XXX could optimize by passing recvd challenge */ 1125 memcpy(ni->ni_challenge, &challenge[2], challenge[1]); 1126 IEEE80211_SEND_MGMT(ni, 1127 IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 1128 break; 1129 default: 1130 IEEE80211_DISCARD(vap, IEEE80211_MSG_AUTH, 1131 wh, "shared key auth", "bad seq %d", seq); 1132 vap->iv_stats.is_rx_bad_auth++; 1133 return; 1134 } 1135 return; 1136 bad: 1137 /* 1138 * Kick the state machine. This short-circuits 1139 * using the mgt frame timeout to trigger the 1140 * state transition. 1141 */ 1142 if (vap->iv_state == IEEE80211_S_AUTH) 1143 ieee80211_new_state(vap, IEEE80211_S_SCAN, 1144 IEEE80211_SCAN_FAIL_STATUS); 1145 } 1146 1147 /* 1148 * Parse the WME IE for QoS and U-APSD information. 1149 * 1150 * Returns -1 if the IE isn't found, 1 if it's found. 1151 */ 1152 int 1153 ieee80211_parse_wmeie(uint8_t *frm, const struct ieee80211_frame *wh, 1154 struct ieee80211_node *ni) 1155 { 1156 u_int len = frm[1]; 1157 1158 ni->ni_uapsd = 0; 1159 1160 if (len < sizeof(struct ieee80211_wme_param)-2) { 1161 IEEE80211_DISCARD_IE(ni->ni_vap, 1162 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WME, 1163 wh, "WME", "too short, len %u", len); 1164 return -1; 1165 } 1166 1167 ni->ni_uapsd = frm[WME_CAPINFO_IE_OFFSET]; 1168 1169 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_POWER | IEEE80211_MSG_ASSOC, 1170 ni, "U-APSD settings from STA: 0x%02x", ni->ni_uapsd); 1171 1172 return 1; 1173 } 1174 1175 int 1176 ieee80211_parse_wmeparams(struct ieee80211vap *vap, uint8_t *frm, 1177 const struct ieee80211_frame *wh, uint8_t *qosinfo) 1178 { 1179 struct ieee80211_wme_state *wme = &vap->iv_ic->ic_wme; 1180 u_int len = frm[1], qosinfo_count; 1181 int i; 1182 1183 *qosinfo = 0; 1184 1185 if (len < sizeof(struct ieee80211_wme_param)-2) { 1186 IEEE80211_DISCARD_IE(vap, 1187 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WME, 1188 wh, "WME", "too short, len %u", len); 1189 return -1; 1190 } 1191 *qosinfo = frm[__offsetof(struct ieee80211_wme_param, param_qosInfo)]; 1192 qosinfo_count = *qosinfo & WME_QOSINFO_COUNT; 1193 1194 /* XXX do proper check for wraparound */ 1195 if (qosinfo_count == wme->wme_wmeChanParams.cap_info) 1196 return 0; 1197 frm += __offsetof(struct ieee80211_wme_param, params_acParams); 1198 for (i = 0; i < WME_NUM_AC; i++) { 1199 struct wmeParams *wmep = 1200 &wme->wme_wmeChanParams.cap_wmeParams[i]; 1201 /* NB: ACI not used */ 1202 wmep->wmep_acm = _IEEE80211_MASKSHIFT(frm[0], WME_PARAM_ACM); 1203 wmep->wmep_aifsn = 1204 _IEEE80211_MASKSHIFT(frm[0], WME_PARAM_AIFSN); 1205 wmep->wmep_logcwmin = 1206 _IEEE80211_MASKSHIFT(frm[1], WME_PARAM_LOGCWMIN); 1207 wmep->wmep_logcwmax = 1208 _IEEE80211_MASKSHIFT(frm[1], WME_PARAM_LOGCWMAX); 1209 wmep->wmep_txopLimit = le16dec(frm+2); 1210 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME, 1211 "%s: WME: %d: acm=%d aifsn=%d logcwmin=%d logcwmax=%d txopLimit=%d\n", 1212 __func__, 1213 i, 1214 wmep->wmep_acm, 1215 wmep->wmep_aifsn, 1216 wmep->wmep_logcwmin, 1217 wmep->wmep_logcwmax, 1218 wmep->wmep_txopLimit); 1219 frm += 4; 1220 } 1221 wme->wme_wmeChanParams.cap_info = qosinfo_count; 1222 return 1; 1223 } 1224 1225 /* 1226 * Process 11h Channel Switch Announcement (CSA) ie. If this 1227 * is the first CSA then initiate the switch. Otherwise we 1228 * track state and trigger completion and/or cancel of the switch. 1229 * XXX should be public for IBSS use 1230 */ 1231 static void 1232 ieee80211_parse_csaparams(struct ieee80211vap *vap, uint8_t *frm, 1233 const struct ieee80211_frame *wh) 1234 { 1235 struct ieee80211com *ic = vap->iv_ic; 1236 const struct ieee80211_csa_ie *csa = 1237 (const struct ieee80211_csa_ie *) frm; 1238 1239 KASSERT(vap->iv_state >= IEEE80211_S_RUN, 1240 ("state %s", ieee80211_state_name[vap->iv_state])); 1241 1242 if (csa->csa_mode > 1) { 1243 IEEE80211_DISCARD_IE(vap, 1244 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1245 wh, "CSA", "invalid mode %u", csa->csa_mode); 1246 return; 1247 } 1248 IEEE80211_LOCK(ic); 1249 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 1250 /* 1251 * Convert the channel number to a channel reference. We 1252 * try first to preserve turbo attribute of the current 1253 * channel then fallback. Note this will not work if the 1254 * CSA specifies a channel that requires a band switch (e.g. 1255 * 11a => 11g). This is intentional as 11h is defined only 1256 * for 5GHz/11a and because the switch does not involve a 1257 * reassociation, protocol state (capabilities, negotated 1258 * rates, etc) may/will be wrong. 1259 */ 1260 struct ieee80211_channel *c = 1261 ieee80211_find_channel_byieee(ic, csa->csa_newchan, 1262 (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALLTURBO)); 1263 if (c == NULL) { 1264 c = ieee80211_find_channel_byieee(ic, 1265 csa->csa_newchan, 1266 (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALL)); 1267 if (c == NULL) { 1268 IEEE80211_DISCARD_IE(vap, 1269 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1270 wh, "CSA", "invalid channel %u", 1271 csa->csa_newchan); 1272 goto done; 1273 } 1274 } 1275 #if IEEE80211_CSA_COUNT_MIN > 0 1276 if (csa->csa_count < IEEE80211_CSA_COUNT_MIN) { 1277 /* 1278 * Require at least IEEE80211_CSA_COUNT_MIN count to 1279 * reduce the risk of being redirected by a fabricated 1280 * CSA. If a valid CSA is dropped we'll still get a 1281 * beacon miss when the AP leaves the channel so we'll 1282 * eventually follow to the new channel. 1283 * 1284 * NOTE: this violates the 11h spec that states that 1285 * count may be any value and if 0 then a switch 1286 * should happen asap. 1287 */ 1288 IEEE80211_DISCARD_IE(vap, 1289 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1290 wh, "CSA", "count %u too small, must be >= %u", 1291 csa->csa_count, IEEE80211_CSA_COUNT_MIN); 1292 goto done; 1293 } 1294 #endif 1295 ieee80211_csa_startswitch(ic, c, csa->csa_mode, csa->csa_count); 1296 } else { 1297 /* 1298 * Validate this ie against the initial CSA. We require 1299 * mode and channel not change and the count must be 1300 * monotonically decreasing. This may be pointless and 1301 * canceling the switch as a result may be too paranoid but 1302 * in the worst case if we drop out of CSA because of this 1303 * and the AP does move then we'll just end up taking a 1304 * beacon miss and scan to find the AP. 1305 * 1306 * XXX may want <= on count as we also process ProbeResp 1307 * frames and those may come in w/ the same count as the 1308 * previous beacon; but doing so leaves us open to a stuck 1309 * count until we add a dead-man timer 1310 */ 1311 if (!(csa->csa_count < ic->ic_csa_count && 1312 csa->csa_mode == ic->ic_csa_mode && 1313 csa->csa_newchan == ieee80211_chan2ieee(ic, ic->ic_csa_newchan))) { 1314 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_DOTH, wh, 1315 "CSA ie mismatch, initial ie <%d,%d,%d>, " 1316 "this ie <%d,%d,%d>", ic->ic_csa_mode, 1317 ic->ic_csa_newchan, ic->ic_csa_count, 1318 csa->csa_mode, csa->csa_newchan, csa->csa_count); 1319 ieee80211_csa_cancelswitch(ic); 1320 } else { 1321 if (csa->csa_count <= 1) 1322 ieee80211_csa_completeswitch(ic); 1323 else 1324 ic->ic_csa_count = csa->csa_count; 1325 } 1326 } 1327 done: 1328 IEEE80211_UNLOCK(ic); 1329 } 1330 1331 /* 1332 * Return non-zero if a background scan may be continued: 1333 * o bg scan is active 1334 * o no channel switch is pending 1335 * o there has not been any traffic recently 1336 * o no full-offload scan support (no need for explicitly continuing scan then) 1337 * 1338 * Note we do not check if there is an administrative enable; 1339 * this is only done to start the scan. We assume that any 1340 * change in state will be accompanied by a request to cancel 1341 * active scans which will otherwise cause this test to fail. 1342 */ 1343 static __inline int 1344 contbgscan(struct ieee80211vap *vap) 1345 { 1346 struct ieee80211com *ic = vap->iv_ic; 1347 1348 return ((ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN) && 1349 (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && 1350 !(vap->iv_flags_ext & IEEE80211_FEXT_SCAN_OFFLOAD) && 1351 vap->iv_state == IEEE80211_S_RUN && /* XXX? */ 1352 ieee80211_time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)); 1353 } 1354 1355 /* 1356 * Return non-zero if a backgrond scan may be started: 1357 * o bg scanning is administratively enabled 1358 * o no channel switch is pending 1359 * o we are not boosted on a dynamic turbo channel 1360 * o there has not been a scan recently 1361 * o there has not been any traffic recently (don't check if full-offload scan) 1362 */ 1363 static __inline int 1364 startbgscan(struct ieee80211vap *vap) 1365 { 1366 struct ieee80211com *ic = vap->iv_ic; 1367 1368 return ((vap->iv_flags & IEEE80211_F_BGSCAN) && 1369 (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && 1370 #ifdef IEEE80211_SUPPORT_SUPERG 1371 !IEEE80211_IS_CHAN_DTURBO(ic->ic_curchan) && 1372 #endif 1373 ieee80211_time_after(ticks, ic->ic_lastscan + vap->iv_bgscanintvl) && 1374 ((vap->iv_flags_ext & IEEE80211_FEXT_SCAN_OFFLOAD) || 1375 ieee80211_time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle))); 1376 } 1377 1378 #ifdef notyet 1379 /* 1380 * Compare two quiet IEs and return if they are equivalent. 1381 * 1382 * The tbttcount isnt checked - that's not part of the configuration. 1383 */ 1384 static int 1385 compare_quiet_ie(const struct ieee80211_quiet_ie *q1, 1386 const struct ieee80211_quiet_ie *q2) 1387 { 1388 1389 if (q1->period != q2->period) 1390 return (0); 1391 if (le16dec(&q1->duration) != le16dec(&q2->duration)) 1392 return (0); 1393 if (le16dec(&q1->offset) != le16dec(&q2->offset)) 1394 return (0); 1395 return (1); 1396 } 1397 #endif 1398 1399 static void 1400 sta_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1401 const struct ieee80211_rx_stats *rxs, 1402 int rssi, int nf) 1403 { 1404 #define ISREASSOC(_st) ((_st) == IEEE80211_FC0_SUBTYPE_REASSOC_RESP) 1405 struct ieee80211vap *vap = ni->ni_vap; 1406 struct ieee80211com *ic = ni->ni_ic; 1407 struct ieee80211_channel *rxchan = ic->ic_curchan; 1408 struct ieee80211_frame *wh; 1409 int ht_state_change = 0, do_ht = 0; 1410 uint8_t *frm, *efrm; 1411 uint8_t *rates, *xrates, *wme, *htcap, *htinfo; 1412 uint8_t *vhtcap, *vhtopmode; 1413 uint8_t rate; 1414 uint8_t qosinfo; 1415 1416 wh = mtod(m0, struct ieee80211_frame *); 1417 frm = (uint8_t *)&wh[1]; 1418 efrm = mtod(m0, uint8_t *) + m0->m_len; 1419 switch (subtype) { 1420 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1421 case IEEE80211_FC0_SUBTYPE_BEACON: { 1422 struct ieee80211_scanparams scan; 1423 struct ieee80211_channel *c; 1424 /* 1425 * We process beacon/probe response frames: 1426 * o when scanning, or 1427 * o station mode when associated (to collect state 1428 * updates such as 802.11g slot time) 1429 * Frames otherwise received are discarded. 1430 */ 1431 if (!((ic->ic_flags & IEEE80211_F_SCAN) || ni->ni_associd)) { 1432 vap->iv_stats.is_rx_mgtdiscard++; 1433 return; 1434 } 1435 1436 /* Override RX channel as appropriate */ 1437 if (rxs != NULL) { 1438 c = ieee80211_lookup_channel_rxstatus(vap, rxs); 1439 if (c != NULL) 1440 rxchan = c; 1441 } 1442 1443 /* XXX probe response in sta mode when !scanning? */ 1444 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0) { 1445 if (! (ic->ic_flags & IEEE80211_F_SCAN)) 1446 vap->iv_stats.is_beacon_bad++; 1447 return; 1448 } 1449 1450 /* 1451 * Count frame now that we know it's to be processed. 1452 */ 1453 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1454 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1455 IEEE80211_NODE_STAT(ni, rx_beacons); 1456 } else 1457 IEEE80211_NODE_STAT(ni, rx_proberesp); 1458 /* 1459 * When operating in station mode, check for state updates. 1460 * Be careful to ignore beacons received while doing a 1461 * background scan. We consider only 11g/WMM stuff right now. 1462 */ 1463 if (ni->ni_associd != 0 && 1464 ((ic->ic_flags & IEEE80211_F_SCAN) == 0 || 1465 IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_bssid))) { 1466 /* record tsf of last beacon */ 1467 memcpy(ni->ni_tstamp.data, scan.tstamp, 1468 sizeof(ni->ni_tstamp)); 1469 /* count beacon frame for s/w bmiss handling */ 1470 vap->iv_swbmiss_count++; 1471 vap->iv_bmiss_count = 0; 1472 if (ni->ni_erp != scan.erp) { 1473 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1474 wh->i_addr2, 1475 "erp change: was 0x%x, now 0x%x", 1476 ni->ni_erp, scan.erp); 1477 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1478 (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) 1479 vap->iv_flags |= IEEE80211_F_USEPROT; 1480 else 1481 vap->iv_flags &= ~IEEE80211_F_USEPROT; 1482 ni->ni_erp = scan.erp; 1483 /* XXX statistic */ 1484 /* driver notification */ 1485 ieee80211_vap_update_erp_protmode(vap); 1486 } 1487 if ((ni->ni_capinfo ^ scan.capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME) { 1488 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1489 wh->i_addr2, 1490 "capabilities change: was 0x%x, now 0x%x", 1491 ni->ni_capinfo, scan.capinfo); 1492 /* 1493 * NB: we assume short preamble doesn't 1494 * change dynamically 1495 */ 1496 ieee80211_vap_set_shortslottime(vap, 1497 IEEE80211_IS_CHAN_A(ic->ic_bsschan) || 1498 (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1499 ni->ni_capinfo = (ni->ni_capinfo &~ IEEE80211_CAPINFO_SHORT_SLOTTIME) 1500 | (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME); 1501 /* XXX statistic */ 1502 } 1503 if (scan.wme != NULL && 1504 (ni->ni_flags & IEEE80211_NODE_QOS)) { 1505 int _retval; 1506 if ((_retval = ieee80211_parse_wmeparams(vap, 1507 scan.wme, wh, &qosinfo)) >= 0) { 1508 if (qosinfo & WME_CAPINFO_UAPSD_EN) 1509 ni->ni_flags |= 1510 IEEE80211_NODE_UAPSD; 1511 if (_retval > 0) 1512 ieee80211_wme_updateparams(vap); 1513 } 1514 } else 1515 ni->ni_flags &= ~IEEE80211_NODE_UAPSD; 1516 #ifdef IEEE80211_SUPPORT_SUPERG 1517 if (scan.ath != NULL) 1518 ieee80211_parse_athparams(ni, scan.ath, wh); 1519 #endif 1520 if (scan.htcap != NULL && scan.htinfo != NULL && 1521 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1522 /* XXX state changes? */ 1523 ieee80211_ht_updateparams(ni, 1524 scan.htcap, scan.htinfo); 1525 do_ht = 1; 1526 } 1527 if (scan.vhtcap != NULL && scan.vhtopmode != NULL && 1528 (vap->iv_flags_vht & IEEE80211_FVHT_VHT)) { 1529 /* XXX state changes? */ 1530 ieee80211_vht_updateparams(ni, 1531 scan.vhtcap, scan.vhtopmode); 1532 do_ht = 1; 1533 } 1534 if (do_ht) { 1535 if (ieee80211_ht_updateparams_final(ni, 1536 scan.htcap, scan.htinfo)) 1537 ht_state_change = 1; 1538 } 1539 1540 /* 1541 * If we have a quiet time IE then report it up to 1542 * the driver. 1543 * 1544 * Otherwise, inform the driver that the quiet time 1545 * IE has disappeared - only do that once rather than 1546 * spamming it each time. 1547 */ 1548 if (scan.quiet) { 1549 ic->ic_set_quiet(ni, scan.quiet); 1550 ni->ni_quiet_ie_set = 1; 1551 memcpy(&ni->ni_quiet_ie, scan.quiet, 1552 sizeof(struct ieee80211_quiet_ie)); 1553 } else { 1554 if (ni->ni_quiet_ie_set == 1) 1555 ic->ic_set_quiet(ni, NULL); 1556 ni->ni_quiet_ie_set = 0; 1557 bzero(&ni->ni_quiet_ie, 1558 sizeof(struct ieee80211_quiet_ie)); 1559 } 1560 1561 if (scan.tim != NULL) { 1562 struct ieee80211_tim_ie *tim = 1563 (struct ieee80211_tim_ie *) scan.tim; 1564 /* 1565 * XXX Check/debug this code; see if it's about 1566 * the right time to force the VAP awake if we 1567 * receive a frame destined for us? 1568 */ 1569 int aid = IEEE80211_AID(ni->ni_associd); 1570 int ix = aid / NBBY; 1571 int min = tim->tim_bitctl &~ 1; 1572 int max = tim->tim_len + min - 4; 1573 int tim_ucast = 0; 1574 #ifdef __notyet__ 1575 int tim_mcast = 0; 1576 #endif 1577 1578 /* 1579 * Only do this for unicast traffic in the TIM 1580 * The multicast traffic notification for 1581 * the scan notification stuff should occur 1582 * differently. 1583 */ 1584 if (min <= ix && ix <= max && 1585 isset(tim->tim_bitmap - min, aid)) { 1586 tim_ucast = 1; 1587 } 1588 1589 #ifdef __notyet__ 1590 /* 1591 * Do a separate notification 1592 * for the multicast bit being set. 1593 */ 1594 if (tim->tim_bitctl & 1) { 1595 tim_mcast = 1; 1596 } 1597 #endif 1598 1599 /* 1600 * If the TIM indicates there's traffic for 1601 * us then get us out of STA mode powersave. 1602 */ 1603 if (tim_ucast == 1) { 1604 /* 1605 * Wake us out of SLEEP state if we're 1606 * in it; and if we're doing bgscan 1607 * then wake us out of STA powersave. 1608 */ 1609 ieee80211_sta_tim_notify(vap, 1); 1610 1611 /* 1612 * This is preventing us from 1613 * continuing a bgscan; because it 1614 * tricks the contbgscan() 1615 * routine to think there's always 1616 * traffic for us. 1617 * 1618 * I think we need both an RX and 1619 * TX ic_lastdata field. 1620 */ 1621 ic->ic_lastdata = ticks; 1622 } 1623 1624 ni->ni_dtim_count = tim->tim_count; 1625 ni->ni_dtim_period = tim->tim_period; 1626 } 1627 if (scan.csa != NULL && 1628 (vap->iv_flags & IEEE80211_F_DOTH)) 1629 ieee80211_parse_csaparams(vap, scan.csa, wh); 1630 else if (ic->ic_flags & IEEE80211_F_CSAPENDING) { 1631 /* 1632 * No CSA ie or 11h disabled, but a channel 1633 * switch is pending; drop out so we aren't 1634 * stuck in CSA state. If the AP really is 1635 * moving we'll get a beacon miss and scan. 1636 */ 1637 IEEE80211_LOCK(ic); 1638 ieee80211_csa_cancelswitch(ic); 1639 IEEE80211_UNLOCK(ic); 1640 } 1641 /* 1642 * If scanning, pass the info to the scan module. 1643 * Otherwise, check if it's the right time to do 1644 * a background scan. Background scanning must 1645 * be enabled and we must not be operating in the 1646 * turbo phase of dynamic turbo mode. Then, 1647 * it's been a while since the last background 1648 * scan and if no data frames have come through 1649 * recently, kick off a scan. Note that this 1650 * is the mechanism by which a background scan 1651 * is started _and_ continued each time we 1652 * return on-channel to receive a beacon from 1653 * our ap. 1654 */ 1655 if (ic->ic_flags & IEEE80211_F_SCAN) { 1656 ieee80211_add_scan(vap, rxchan, 1657 &scan, wh, subtype, rssi, nf); 1658 } else if (contbgscan(vap)) { 1659 ieee80211_bg_scan(vap, 0); 1660 } else if (startbgscan(vap)) { 1661 vap->iv_stats.is_scan_bg++; 1662 #if 0 1663 /* wakeup if we are sleeing */ 1664 ieee80211_set_pwrsave(vap, 0); 1665 #endif 1666 ieee80211_bg_scan(vap, 0); 1667 } 1668 1669 /* 1670 * Put the station to sleep if we haven't seen 1671 * traffic in a while. 1672 */ 1673 IEEE80211_LOCK(ic); 1674 ieee80211_sta_ps_timer_check(vap); 1675 IEEE80211_UNLOCK(ic); 1676 1677 /* 1678 * If we've had a channel width change (eg HT20<->HT40) 1679 * then schedule a delayed driver notification. 1680 */ 1681 if (ht_state_change) 1682 ieee80211_update_chw(ic); 1683 return; 1684 } 1685 /* 1686 * If scanning, just pass information to the scan module. 1687 */ 1688 if (ic->ic_flags & IEEE80211_F_SCAN) { 1689 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1690 /* 1691 * Actively scanning a channel marked passive; 1692 * send a probe request now that we know there 1693 * is 802.11 traffic present. 1694 * 1695 * XXX check if the beacon we recv'd gives 1696 * us what we need and suppress the probe req 1697 */ 1698 ieee80211_probe_curchan(vap, 1); 1699 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1700 } 1701 ieee80211_add_scan(vap, rxchan, &scan, wh, 1702 subtype, rssi, nf); 1703 return; 1704 } 1705 break; 1706 } 1707 1708 case IEEE80211_FC0_SUBTYPE_AUTH: { 1709 uint16_t algo, seq, status; 1710 /* 1711 * auth frame format 1712 * [2] algorithm 1713 * [2] sequence 1714 * [2] status 1715 * [tlv*] challenge 1716 */ 1717 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1718 algo = le16toh(*(uint16_t *)frm); 1719 seq = le16toh(*(uint16_t *)(frm + 2)); 1720 status = le16toh(*(uint16_t *)(frm + 4)); 1721 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2, 1722 "recv auth frame with algorithm %d seq %d", algo, seq); 1723 1724 if (vap->iv_flags & IEEE80211_F_COUNTERM) { 1725 IEEE80211_DISCARD(vap, 1726 IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO, 1727 wh, "auth", "%s", "TKIP countermeasures enabled"); 1728 vap->iv_stats.is_rx_auth_countermeasures++; 1729 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 1730 ieee80211_send_error(ni, wh->i_addr2, 1731 IEEE80211_FC0_SUBTYPE_AUTH, 1732 IEEE80211_REASON_MIC_FAILURE); 1733 } 1734 return; 1735 } 1736 if (algo == IEEE80211_AUTH_ALG_SHARED) 1737 sta_auth_shared(ni, wh, frm + 6, efrm, rssi, nf, 1738 seq, status); 1739 else if (algo == IEEE80211_AUTH_ALG_OPEN) 1740 sta_auth_open(ni, wh, rssi, nf, seq, status); 1741 else { 1742 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1743 wh, "auth", "unsupported alg %d", algo); 1744 vap->iv_stats.is_rx_auth_unsupported++; 1745 return; 1746 } 1747 break; 1748 } 1749 1750 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 1751 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: { 1752 uint16_t capinfo, associd; 1753 uint16_t status; 1754 1755 if (vap->iv_state != IEEE80211_S_ASSOC) { 1756 vap->iv_stats.is_rx_mgtdiscard++; 1757 return; 1758 } 1759 1760 /* 1761 * asresp frame format 1762 * [2] capability information 1763 * [2] status 1764 * [2] association ID 1765 * [tlv] supported rates 1766 * [tlv] extended supported rates 1767 * [tlv] WME 1768 * [tlv] HT capabilities 1769 * [tlv] HT info 1770 */ 1771 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1772 ni = vap->iv_bss; 1773 capinfo = le16toh(*(uint16_t *)frm); 1774 frm += 2; 1775 status = le16toh(*(uint16_t *)frm); 1776 frm += 2; 1777 if (status != 0) { 1778 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1779 wh->i_addr2, "%sassoc failed (reason %d)", 1780 ISREASSOC(subtype) ? "re" : "", status); 1781 vap->iv_stats.is_rx_auth_fail++; /* XXX */ 1782 return; 1783 } 1784 associd = le16toh(*(uint16_t *)frm); 1785 frm += 2; 1786 1787 rates = xrates = wme = htcap = htinfo = NULL; 1788 vhtcap = vhtopmode = NULL; 1789 while (efrm - frm > 1) { 1790 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1791 switch (*frm) { 1792 case IEEE80211_ELEMID_RATES: 1793 rates = frm; 1794 break; 1795 case IEEE80211_ELEMID_XRATES: 1796 xrates = frm; 1797 break; 1798 case IEEE80211_ELEMID_HTCAP: 1799 htcap = frm; 1800 break; 1801 case IEEE80211_ELEMID_HTINFO: 1802 htinfo = frm; 1803 break; 1804 case IEEE80211_ELEMID_VENDOR: 1805 if (iswmeoui(frm)) 1806 wme = frm; 1807 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) { 1808 /* 1809 * Accept pre-draft HT ie's if the 1810 * standard ones have not been seen. 1811 */ 1812 if (ishtcapoui(frm)) { 1813 if (htcap == NULL) 1814 htcap = frm; 1815 } else if (ishtinfooui(frm)) { 1816 if (htinfo == NULL) 1817 htinfo = frm; 1818 } 1819 } 1820 /* XXX Atheros OUI support */ 1821 break; 1822 case IEEE80211_ELEMID_VHT_CAP: 1823 vhtcap = frm; 1824 break; 1825 case IEEE80211_ELEMID_VHT_OPMODE: 1826 vhtopmode = frm; 1827 break; 1828 } 1829 frm += frm[1] + 2; 1830 } 1831 1832 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1833 if (xrates != NULL) 1834 IEEE80211_VERIFY_ELEMENT(xrates, 1835 IEEE80211_RATE_MAXSIZE - rates[1], return); 1836 rate = ieee80211_setup_rates(ni, rates, xrates, 1837 IEEE80211_F_JOIN | 1838 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1839 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1840 if (rate & IEEE80211_RATE_BASIC) { 1841 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1842 wh->i_addr2, 1843 "%sassoc failed (rate set mismatch)", 1844 ISREASSOC(subtype) ? "re" : ""); 1845 vap->iv_stats.is_rx_assoc_norate++; 1846 ieee80211_new_state(vap, IEEE80211_S_SCAN, 1847 IEEE80211_SCAN_FAIL_STATUS); 1848 return; 1849 } 1850 1851 ni->ni_capinfo = capinfo; 1852 ni->ni_associd = associd; 1853 if (ni->ni_jointime == 0) 1854 ni->ni_jointime = time_uptime; 1855 if (wme != NULL && 1856 ieee80211_parse_wmeparams(vap, wme, wh, &qosinfo) >= 0) { 1857 ni->ni_flags |= IEEE80211_NODE_QOS; 1858 ieee80211_wme_updateparams(vap); 1859 } else 1860 ni->ni_flags &= ~IEEE80211_NODE_QOS; 1861 /* 1862 * Setup HT state according to the negotiation. 1863 * 1864 * NB: shouldn't need to check if HT use is enabled but some 1865 * ap's send back HT ie's even when we don't indicate we 1866 * are HT capable in our AssocReq. 1867 */ 1868 if (htcap != NULL && htinfo != NULL && 1869 (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1870 ieee80211_ht_node_init(ni); 1871 ieee80211_ht_updateparams(ni, htcap, htinfo); 1872 1873 if ((vhtcap != NULL) && (vhtopmode != NULL) & 1874 (vap->iv_flags_vht & IEEE80211_FVHT_VHT)) { 1875 /* 1876 * Log if we get a VHT assoc/reassoc response. 1877 * We aren't ready for 2GHz VHT support. 1878 */ 1879 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 1880 printf("%s: peer %6D: VHT on 2GHz, ignoring\n", 1881 __func__, 1882 ni->ni_macaddr, 1883 ":"); 1884 } else { 1885 ieee80211_vht_node_init(ni); 1886 ieee80211_vht_updateparams(ni, vhtcap, vhtopmode); 1887 ieee80211_setup_vht_rates(ni, vhtcap, vhtopmode); 1888 } 1889 } 1890 1891 ieee80211_ht_updateparams_final(ni, htcap, htinfo); 1892 ieee80211_setup_htrates(ni, htcap, 1893 IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1894 ieee80211_setup_basic_htrates(ni, htinfo); 1895 1896 ieee80211_node_setuptxparms(ni); 1897 ieee80211_ratectl_node_init(ni); 1898 } 1899 1900 /* 1901 * Always initialise FF/superg state; we can use this 1902 * for doing A-MSDU encapsulation as well. 1903 */ 1904 #ifdef IEEE80211_SUPPORT_SUPERG 1905 ieee80211_ff_node_init(ni); 1906 #endif 1907 1908 /* 1909 * Configure state now that we are associated. 1910 * 1911 * XXX may need different/additional driver callbacks? 1912 */ 1913 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) || 1914 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1915 vap->iv_flags |= IEEE80211_F_SHPREAMBLE; 1916 vap->iv_flags &= ~IEEE80211_F_USEBARKER; 1917 } else { 1918 vap->iv_flags &= ~IEEE80211_F_SHPREAMBLE; 1919 vap->iv_flags |= IEEE80211_F_USEBARKER; 1920 } 1921 ieee80211_vap_set_shortslottime(vap, 1922 IEEE80211_IS_CHAN_A(ic->ic_curchan) || 1923 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1924 ieee80211_vap_update_preamble(vap); 1925 /* 1926 * Honor ERP protection. 1927 * 1928 * NB: ni_erp should zero for non-11g operation. 1929 */ 1930 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1931 (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) 1932 vap->iv_flags |= IEEE80211_F_USEPROT; 1933 else 1934 vap->iv_flags &= ~IEEE80211_F_USEPROT; 1935 ieee80211_vap_update_erp_protmode(vap); 1936 IEEE80211_NOTE_MAC(vap, 1937 IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, wh->i_addr2, 1938 "%sassoc success at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s%s", 1939 ISREASSOC(subtype) ? "re" : "", 1940 IEEE80211_NODE_AID(ni), 1941 vap->iv_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 1942 vap->iv_flags&IEEE80211_F_SHSLOT ? "short" : "long", 1943 vap->iv_flags&IEEE80211_F_USEPROT ? ", protection" : "", 1944 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 1945 ni->ni_flags & IEEE80211_NODE_HT ? 1946 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 1947 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 1948 ni->ni_flags & IEEE80211_NODE_AMSDU ? " (+AMSDU)" : "", 1949 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 1950 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 1951 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 1952 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 1953 ", fast-frames" : "", 1954 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 1955 ", turbo" : "" 1956 ); 1957 ieee80211_new_state(vap, IEEE80211_S_RUN, subtype); 1958 break; 1959 } 1960 1961 case IEEE80211_FC0_SUBTYPE_DEAUTH: { 1962 uint16_t reason; 1963 1964 if (vap->iv_state == IEEE80211_S_SCAN) { 1965 vap->iv_stats.is_rx_mgtdiscard++; 1966 return; 1967 } 1968 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 1969 /* NB: can happen when in promiscuous mode */ 1970 vap->iv_stats.is_rx_mgtdiscard++; 1971 break; 1972 } 1973 1974 /* 1975 * deauth frame format 1976 * [2] reason 1977 */ 1978 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 1979 reason = le16toh(*(uint16_t *)frm); 1980 1981 vap->iv_stats.is_rx_deauth++; 1982 vap->iv_stats.is_rx_deauth_code = reason; 1983 IEEE80211_NODE_STAT(ni, rx_deauth); 1984 1985 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 1986 "recv deauthenticate (reason: %d (%s))", reason, 1987 ieee80211_reason_to_string(reason)); 1988 ieee80211_new_state(vap, IEEE80211_S_AUTH, 1989 (reason << 8) | IEEE80211_FC0_SUBTYPE_DEAUTH); 1990 break; 1991 } 1992 1993 case IEEE80211_FC0_SUBTYPE_DISASSOC: { 1994 uint16_t reason; 1995 1996 if (vap->iv_state != IEEE80211_S_RUN && 1997 vap->iv_state != IEEE80211_S_ASSOC && 1998 vap->iv_state != IEEE80211_S_AUTH) { 1999 vap->iv_stats.is_rx_mgtdiscard++; 2000 return; 2001 } 2002 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 2003 /* NB: can happen when in promiscuous mode */ 2004 vap->iv_stats.is_rx_mgtdiscard++; 2005 break; 2006 } 2007 2008 /* 2009 * disassoc frame format 2010 * [2] reason 2011 */ 2012 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 2013 reason = le16toh(*(uint16_t *)frm); 2014 2015 vap->iv_stats.is_rx_disassoc++; 2016 vap->iv_stats.is_rx_disassoc_code = reason; 2017 IEEE80211_NODE_STAT(ni, rx_disassoc); 2018 2019 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 2020 "recv disassociate (reason: %d (%s))", reason, 2021 ieee80211_reason_to_string(reason)); 2022 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 2023 break; 2024 } 2025 2026 case IEEE80211_FC0_SUBTYPE_ACTION: 2027 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 2028 if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 2029 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2030 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2031 wh, NULL, "%s", "not for us"); 2032 vap->iv_stats.is_rx_mgtdiscard++; 2033 } else if (vap->iv_state != IEEE80211_S_RUN) { 2034 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2035 wh, NULL, "wrong state %s", 2036 ieee80211_state_name[vap->iv_state]); 2037 vap->iv_stats.is_rx_mgtdiscard++; 2038 } else { 2039 if (ieee80211_parse_action(ni, m0) == 0) 2040 (void)ic->ic_recv_action(ni, wh, frm, efrm); 2041 } 2042 break; 2043 2044 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2045 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2046 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 2047 case IEEE80211_FC0_SUBTYPE_TIMING_ADV: 2048 case IEEE80211_FC0_SUBTYPE_ATIM: 2049 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2050 wh, NULL, "%s", "not handled"); 2051 vap->iv_stats.is_rx_mgtdiscard++; 2052 break; 2053 2054 default: 2055 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2056 wh, "mgt", "subtype 0x%x not handled", subtype); 2057 vap->iv_stats.is_rx_badsubtype++; 2058 break; 2059 } 2060 #undef ISREASSOC 2061 } 2062 2063 static void 2064 sta_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 2065 { 2066 switch (subtype) { 2067 case IEEE80211_FC0_SUBTYPE_BAR: 2068 ieee80211_recv_bar(ni, m); 2069 break; 2070 } 2071 } 2072