1 /* 2 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 /* 7 * Copyright (c) 2001 Atsushi Onoe 8 * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * Alternatively, this software may be distributed under the terms of the 23 * GNU General Public License ("GPL") version 2 as published by the Free 24 * Software Foundation. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 27 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 28 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 29 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 30 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 31 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 35 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #pragma ident "%Z%%M% %I% %E% SMI" 39 40 /* 41 * Process received frame 42 */ 43 44 #include <sys/byteorder.h> 45 #include "net80211_impl.h" 46 47 static mblk_t *ieee80211_defrag(ieee80211com_t *, ieee80211_node_t *, 48 mblk_t *, int); 49 50 /* 51 * Process a received frame. The node associated with the sender 52 * should be supplied. If nothing was found in the node table then 53 * the caller is assumed to supply a reference to ic_bss instead. 54 * The RSSI and a timestamp are also supplied. The RSSI data is used 55 * during AP scanning to select a AP to associate with; it can have 56 * any units so long as values have consistent units and higher values 57 * mean ``better signal''. The receive timestamp is currently not used 58 * by the 802.11 layer. 59 */ 60 int 61 ieee80211_input(ieee80211com_t *ic, mblk_t *mp, struct ieee80211_node *in, 62 int32_t rssi, uint32_t rstamp) 63 { 64 struct ieee80211_frame *wh; 65 struct ieee80211_key *key; 66 uint8_t *bssid; 67 int hdrspace; 68 int len; 69 uint16_t rxseq; 70 uint8_t dir; 71 uint8_t type; 72 uint8_t subtype; 73 uint8_t tid; 74 75 ASSERT(in != NULL); 76 type = (uint8_t)-1; /* undefined */ 77 len = mp->b_wptr - mp->b_rptr; 78 if (len < sizeof (struct ieee80211_frame_min)) { 79 ieee80211_dbg(IEEE80211_MSG_ANY, "ieee80211_input: " 80 "too short (1): len %u", len); 81 goto out; 82 } 83 /* 84 * Bit of a cheat here, we use a pointer for a 3-address 85 * frame format but don't reference fields past outside 86 * ieee80211_frame_min w/o first validating the data is 87 * present. 88 */ 89 wh = (struct ieee80211_frame *)mp->b_rptr; 90 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 91 IEEE80211_FC0_VERSION_0) { 92 ieee80211_dbg(IEEE80211_MSG_ANY, "ieee80211_input: " 93 "discard pkt with wrong version %x", wh->i_fc[0]); 94 goto out; 95 } 96 97 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 98 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 99 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 100 101 IEEE80211_LOCK(ic); 102 if (!(ic->ic_flags & IEEE80211_F_SCAN)) { 103 switch (ic->ic_opmode) { 104 case IEEE80211_M_STA: 105 bssid = wh->i_addr2; 106 if (!IEEE80211_ADDR_EQ(bssid, in->in_bssid)) 107 goto out_exit_mutex; 108 break; 109 case IEEE80211_M_IBSS: 110 case IEEE80211_M_AHDEMO: 111 if (dir != IEEE80211_FC1_DIR_NODS) { 112 bssid = wh->i_addr1; 113 } else if (type == IEEE80211_FC0_TYPE_CTL) { 114 bssid = wh->i_addr1; 115 } else { 116 if (len < sizeof (struct ieee80211_frame)) { 117 ieee80211_dbg(IEEE80211_MSG_ANY, 118 "ieee80211_input: too short(2):" 119 "len %u\n", len); 120 goto out_exit_mutex; 121 } 122 bssid = wh->i_addr3; 123 } 124 if (type != IEEE80211_FC0_TYPE_DATA) 125 break; 126 /* 127 * Data frame, validate the bssid. 128 */ 129 if (!IEEE80211_ADDR_EQ(bssid, ic->ic_bss->in_bssid) && 130 !IEEE80211_ADDR_EQ(bssid, wifi_bcastaddr)) { 131 /* not interested in */ 132 ieee80211_dbg(IEEE80211_MSG_INPUT, 133 "ieee80211_input: not to bss %s\n", 134 ieee80211_macaddr_sprintf(bssid)); 135 goto out_exit_mutex; 136 } 137 /* 138 * For adhoc mode we cons up a node when it doesn't 139 * exist. This should probably done after an ACL check. 140 */ 141 if (in == ic->ic_bss && 142 ic->ic_opmode != IEEE80211_M_HOSTAP && 143 !IEEE80211_ADDR_EQ(wh->i_addr2, in->in_macaddr)) { 144 /* 145 * Fake up a node for this newly 146 * discovered member of the IBSS. 147 */ 148 in = ieee80211_fakeup_adhoc_node(&ic->ic_sta, 149 wh->i_addr2); 150 if (in == NULL) { 151 /* NB: stat kept for alloc failure */ 152 goto out_exit_mutex; 153 } 154 } 155 break; 156 default: 157 goto out_exit_mutex; 158 } 159 in->in_rssi = (uint8_t)rssi; 160 in->in_rstamp = rstamp; 161 if (!(type & IEEE80211_FC0_TYPE_CTL)) { 162 tid = 0; 163 rxseq = (*(uint16_t *)wh->i_seq); 164 if ((wh->i_fc[1] & IEEE80211_FC1_RETRY) && 165 (rxseq - in->in_rxseqs[tid]) <= 0) { 166 /* duplicate, discard */ 167 ieee80211_dbg(IEEE80211_MSG_INPUT, 168 "ieee80211_input: duplicate", 169 "seqno <%u,%u> fragno <%u,%u> tid %u", 170 rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 171 in->in_rxseqs[tid] >> 172 IEEE80211_SEQ_SEQ_SHIFT, 173 rxseq & IEEE80211_SEQ_FRAG_MASK, 174 in->in_rxseqs[tid] & 175 IEEE80211_SEQ_FRAG_MASK, 176 tid); 177 ic->ic_stats.is_rx_dups++; 178 goto out_exit_mutex; 179 } 180 in->in_rxseqs[tid] = rxseq; 181 } 182 in->in_inact = 0; 183 } 184 185 hdrspace = ieee80211_hdrspace(wh); 186 switch (type) { 187 case IEEE80211_FC0_TYPE_DATA: 188 if (len < hdrspace) { 189 ieee80211_dbg(IEEE80211_MSG_ANY, "ieee80211_input: " 190 "data too short: expecting %u", hdrspace); 191 goto out_exit_mutex; 192 } 193 switch (ic->ic_opmode) { 194 case IEEE80211_M_STA: 195 if (dir != IEEE80211_FC1_DIR_FROMDS) { 196 ieee80211_dbg(IEEE80211_MSG_INPUT, 197 "ieee80211_input: data ", 198 "unknown dir 0x%x", dir); 199 goto out_exit_mutex; 200 } 201 if (IEEE80211_IS_MULTICAST(wh->i_addr1) && 202 IEEE80211_ADDR_EQ(wh->i_addr3, ic->ic_macaddr)) { 203 /* 204 * In IEEE802.11 network, multicast packet 205 * sent from me is broadcasted from AP. 206 * It should be silently discarded for 207 * SIMPLEX interface. 208 */ 209 ieee80211_dbg(IEEE80211_MSG_INPUT, 210 "ieee80211_input: multicast echo\n"); 211 goto out_exit_mutex; 212 } 213 break; 214 case IEEE80211_M_IBSS: 215 case IEEE80211_M_AHDEMO: 216 if (dir != IEEE80211_FC1_DIR_NODS) { 217 ieee80211_dbg(IEEE80211_MSG_INPUT, 218 "ieee80211_input: unknown dir 0x%x", 219 dir); 220 goto out_exit_mutex; 221 } 222 break; 223 default: 224 ieee80211_err("ieee80211_input: " 225 "receive data, unknown opmode %u, skip\n", 226 ic->ic_opmode); 227 goto out_exit_mutex; 228 } 229 230 /* 231 * Handle privacy requirements. 232 */ 233 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 234 if ((ic->ic_flags & IEEE80211_F_PRIVACY) == 0) { 235 /* 236 * Discard encrypted frames when privacy off. 237 */ 238 ieee80211_dbg(IEEE80211_MSG_INPUT, 239 "ieee80211_input: ""WEP PRIVACY off"); 240 ic->ic_stats.is_wep_errors++; 241 goto out_exit_mutex; 242 } 243 key = ieee80211_crypto_decap(ic, mp, hdrspace); 244 if (key == NULL) { 245 /* NB: stats+msgs handled in crypto_decap */ 246 ic->ic_stats.is_wep_errors++; 247 goto out_exit_mutex; 248 } 249 wh = (struct ieee80211_frame *)mp->b_rptr; 250 wh->i_fc[1] &= ~IEEE80211_FC1_WEP; 251 } else { 252 key = NULL; 253 } 254 255 /* 256 * Next up, any fragmentation 257 */ 258 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 259 mp = ieee80211_defrag(ic, in, mp, hdrspace); 260 if (mp == NULL) { 261 /* Fragment dropped or frame not complete yet */ 262 goto out_exit_mutex; 263 } 264 } 265 wh = NULL; /* no longer valid, catch any uses */ 266 267 /* 268 * Next strip any MSDU crypto bits. 269 */ 270 if (key != NULL && !ieee80211_crypto_demic(ic, key, mp, 0)) { 271 ieee80211_dbg(IEEE80211_MSG_INPUT, "ieee80211_input: " 272 "data demic error\n"); 273 goto out_exit_mutex; 274 } 275 276 ic->ic_stats.is_rx_frags++; 277 ic->ic_stats.is_rx_bytes += len; 278 IEEE80211_UNLOCK(ic); 279 mac_rx(ic->ic_mach, NULL, mp); 280 return (IEEE80211_FC0_TYPE_DATA); 281 282 case IEEE80211_FC0_TYPE_MGT: 283 if (dir != IEEE80211_FC1_DIR_NODS) 284 goto out_exit_mutex; 285 if (len < sizeof (struct ieee80211_frame)) 286 goto out_exit_mutex; 287 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 288 if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) { 289 /* 290 * Only shared key auth frames with a challenge 291 * should be encrypted, discard all others. 292 */ 293 ieee80211_dbg(IEEE80211_MSG_INPUT, 294 "ieee80211_input: " 295 "%s WEP set but not permitted", 296 IEEE80211_SUBTYPE_NAME(subtype)); 297 ic->ic_stats.is_wep_errors++; 298 goto out_exit_mutex; 299 } 300 if ((ic->ic_flags & IEEE80211_F_PRIVACY) == 0) { 301 /* 302 * Discard encrypted frames when privacy off. 303 */ 304 ieee80211_dbg(IEEE80211_MSG_INPUT, 305 "ieee80211_input: " 306 "mgt WEP set but PRIVACY off"); 307 ic->ic_stats.is_wep_errors++; 308 goto out_exit_mutex; 309 } 310 key = ieee80211_crypto_decap(ic, mp, hdrspace); 311 if (key == NULL) { 312 /* NB: stats+msgs handled in crypto_decap */ 313 goto out_exit_mutex; 314 } 315 wh = (struct ieee80211_frame *)mp->b_rptr; 316 wh->i_fc[1] &= ~IEEE80211_FC1_WEP; 317 } 318 IEEE80211_UNLOCK(ic); 319 ic->ic_recv_mgmt(ic, mp, in, subtype, rssi, rstamp); 320 goto out; 321 322 case IEEE80211_FC0_TYPE_CTL: 323 default: 324 ieee80211_dbg(IEEE80211_MSG_ANY, "ieee80211_input: " 325 "bad frame type 0x%x", type); 326 /* should not come here */ 327 break; 328 } 329 out_exit_mutex: 330 IEEE80211_UNLOCK(ic); 331 out: 332 if (mp != NULL) 333 freemsg(mp); 334 335 return (type); 336 } 337 338 /* 339 * This function reassemble fragments. 340 * More fragments bit in the frame control means the packet is fragmented. 341 * While the sequence control field consists of 4-bit fragment number 342 * field and a 12-bit sequence number field. 343 */ 344 /* ARGSUSED */ 345 static mblk_t * 346 ieee80211_defrag(ieee80211com_t *ic, struct ieee80211_node *in, mblk_t *mp, 347 int hdrspace) 348 { 349 struct ieee80211_frame *wh = (struct ieee80211_frame *)mp->b_rptr; 350 struct ieee80211_frame *lwh; 351 mblk_t *mfrag; 352 uint16_t rxseq; 353 uint8_t fragno; 354 uint8_t more_frag; 355 356 ASSERT(!IEEE80211_IS_MULTICAST(wh->i_addr1)); 357 more_frag = wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG; 358 rxseq = LE_16(*(uint16_t *)wh->i_seq); 359 fragno = rxseq & IEEE80211_SEQ_FRAG_MASK; 360 361 /* Quick way out, if there's nothing to defragment */ 362 if (!more_frag && fragno == 0 && in->in_rxfrag == NULL) 363 return (mp); 364 365 /* 366 * Remove frag to insure it doesn't get reaped by timer. 367 */ 368 if (in->in_table == NULL) { 369 /* 370 * Should never happen. If the node is orphaned (not in 371 * the table) then input packets should not reach here. 372 * Otherwise, a concurrent request that yanks the table 373 * should be blocked by other interlocking and/or by first 374 * shutting the driver down. Regardless, be defensive 375 * here and just bail 376 */ 377 freemsg(mp); 378 return (NULL); 379 } 380 IEEE80211_NODE_LOCK(in->in_table); 381 mfrag = in->in_rxfrag; 382 in->in_rxfrag = NULL; 383 IEEE80211_NODE_UNLOCK(in->in_table); 384 385 /* 386 * Validate new fragment is in order and 387 * related to the previous ones. 388 */ 389 if (mfrag != NULL) { 390 uint16_t last_rxseq; 391 392 lwh = (struct ieee80211_frame *)mfrag->b_rptr; 393 last_rxseq = LE_16(*(uint16_t *)lwh->i_seq); 394 /* 395 * Sequence control field contains 12-bit sequence no 396 * and 4-bit fragment number. For fragemnts, the 397 * sequence no is not changed. 398 * NB: check seq # and frag together 399 */ 400 if (rxseq != last_rxseq + 1 || 401 !IEEE80211_ADDR_EQ(wh->i_addr1, lwh->i_addr1) || 402 !IEEE80211_ADDR_EQ(wh->i_addr2, lwh->i_addr2)) { 403 /* 404 * Unrelated fragment or no space for it, 405 * clear current fragments. 406 */ 407 freemsg(mfrag); 408 mfrag = NULL; 409 } 410 } 411 412 if (mfrag == NULL) { 413 if (fragno != 0) { /* !first fragment, discard */ 414 freemsg(mp); 415 return (NULL); 416 } 417 mfrag = mp; 418 } else { /* concatenate */ 419 (void) adjmsg(mp, hdrspace); 420 linkb(mfrag, mp); 421 /* track last seqnum and fragno */ 422 lwh = (struct ieee80211_frame *)mfrag->b_rptr; 423 *(uint16_t *)lwh->i_seq = *(uint16_t *)wh->i_seq; 424 } 425 if (more_frag != 0) { /* more to come, save */ 426 in->in_rxfragstamp = ddi_get_lbolt(); 427 in->in_rxfrag = mfrag; 428 mfrag = NULL; 429 } 430 431 return (mfrag); 432 } 433 434 /* 435 * Install received rate set information in the node's state block. 436 */ 437 int 438 ieee80211_setup_rates(struct ieee80211_node *in, const uint8_t *rates, 439 const uint8_t *xrates, int flags) 440 { 441 struct ieee80211_rateset *rs = &in->in_rates; 442 443 bzero(rs, sizeof (*rs)); 444 rs->ir_nrates = rates[1]; 445 /* skip 1 byte element ID and 1 byte length */ 446 bcopy(rates + 2, rs->ir_rates, rs->ir_nrates); 447 if (xrates != NULL) { 448 uint8_t nxrates; 449 450 /* 451 * Tack on 11g extended supported rate element. 452 */ 453 nxrates = xrates[1]; 454 if (rs->ir_nrates + nxrates > IEEE80211_RATE_MAXSIZE) { 455 nxrates = IEEE80211_RATE_MAXSIZE - rs->ir_nrates; 456 ieee80211_dbg(IEEE80211_MSG_XRATE, 457 "ieee80211_setup_rates: %s", 458 "[%s] extended rate set too large;" 459 " only using %u of %u rates\n", 460 ieee80211_macaddr_sprintf(in->in_macaddr), 461 nxrates, xrates[1]); 462 } 463 bcopy(xrates + 2, rs->ir_rates + rs->ir_nrates, nxrates); 464 rs->ir_nrates += nxrates; 465 } 466 return (ieee80211_fix_rate(in, flags)); 467 } 468 469 /* 470 * Process open-system authentication response frame and start 471 * association if the authentication request is accepted. 472 */ 473 static void 474 ieee80211_auth_open(ieee80211com_t *ic, struct ieee80211_frame *wh, 475 struct ieee80211_node *in, uint16_t seq, uint16_t status) 476 { 477 IEEE80211_LOCK_ASSERT(ic); 478 if (in->in_authmode == IEEE80211_AUTH_SHARED) { 479 ieee80211_dbg(IEEE80211_MSG_AUTH, 480 "open auth: bad sta auth mode %u", in->in_authmode); 481 return; 482 } 483 if (ic->ic_opmode == IEEE80211_M_STA) { 484 if (ic->ic_state != IEEE80211_S_AUTH || 485 seq != IEEE80211_AUTH_OPEN_RESPONSE) { 486 return; 487 } 488 IEEE80211_UNLOCK(ic); 489 if (status != 0) { 490 ieee80211_dbg(IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 491 "open auth failed (reason %d)\n", status); 492 if (in != ic->ic_bss) 493 in->in_fails++; 494 ieee80211_new_state(ic, IEEE80211_S_SCAN, 0); 495 } else { 496 /* i_fc[0] - frame control's type & subtype field */ 497 ieee80211_new_state(ic, IEEE80211_S_ASSOC, 498 wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK); 499 } 500 IEEE80211_LOCK(ic); 501 } else { 502 ieee80211_dbg(IEEE80211_MSG_AUTH, "ieee80211_auth_open: " 503 "bad operating mode %u", ic->ic_opmode); 504 } 505 } 506 507 /* 508 * Allocate challenge text for use by shared-key authentication 509 * Return B_TRUE on success, B_FALST otherwise. 510 */ 511 static boolean_t 512 ieee80211_alloc_challenge(struct ieee80211_node *in) 513 { 514 if (in->in_challenge == NULL) { 515 in->in_challenge = kmem_alloc(IEEE80211_CHALLENGE_LEN, 516 KM_NOSLEEP); 517 } 518 if (in->in_challenge == NULL) { 519 ieee80211_dbg(IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 520 "[%s] shared key challenge alloc failed\n", 521 ieee80211_macaddr_sprintf(in->in_macaddr)); 522 } 523 return (in->in_challenge != NULL); 524 } 525 526 /* 527 * Process shared-key authentication response frames. If authentication 528 * succeeds, start association; otherwise, restart scan. 529 */ 530 static void 531 ieee80211_auth_shared(ieee80211com_t *ic, struct ieee80211_frame *wh, 532 uint8_t *frm, uint8_t *efrm, struct ieee80211_node *in, uint16_t seq, 533 uint16_t status) 534 { 535 uint8_t *challenge; 536 537 /* 538 * Pre-shared key authentication is evil; accept 539 * it only if explicitly configured (it is supported 540 * mainly for compatibility with clients like OS X). 541 */ 542 IEEE80211_LOCK_ASSERT(ic); 543 if (in->in_authmode != IEEE80211_AUTH_AUTO && 544 in->in_authmode != IEEE80211_AUTH_SHARED) { 545 ieee80211_dbg(IEEE80211_MSG_AUTH, "ieee80211_auth_shared: " 546 "bad sta auth mode %u", in->in_authmode); 547 goto bad; 548 } 549 550 challenge = NULL; 551 if (frm + 1 < efrm) { 552 /* 553 * Challenge text information element 554 * frm[0] - element ID 555 * frm[1] - length 556 * frm[2]... - challenge text 557 */ 558 if ((frm[1] + 2) > (efrm - frm)) { 559 ieee80211_dbg(IEEE80211_MSG_AUTH, 560 "ieee80211_auth_shared: ie %d%d too long\n", 561 frm[0], (frm[1] + 2) - (efrm - frm)); 562 goto bad; 563 } 564 if (*frm == IEEE80211_ELEMID_CHALLENGE) 565 challenge = frm; 566 frm += frm[1] + 2; 567 } 568 switch (seq) { 569 case IEEE80211_AUTH_SHARED_CHALLENGE: 570 case IEEE80211_AUTH_SHARED_RESPONSE: 571 if (challenge == NULL) { 572 ieee80211_dbg(IEEE80211_MSG_AUTH, 573 "ieee80211_auth_shared: no challenge\n"); 574 goto bad; 575 } 576 if (challenge[1] != IEEE80211_CHALLENGE_LEN) { 577 ieee80211_dbg(IEEE80211_MSG_AUTH, 578 "ieee80211_auth_shared: bad challenge len %d\n", 579 challenge[1]); 580 goto bad; 581 } 582 default: 583 break; 584 } 585 switch (ic->ic_opmode) { 586 case IEEE80211_M_STA: 587 if (ic->ic_state != IEEE80211_S_AUTH) 588 return; 589 switch (seq) { 590 case IEEE80211_AUTH_SHARED_PASS: 591 if (in->in_challenge != NULL) { 592 kmem_free(in->in_challenge, 593 IEEE80211_CHALLENGE_LEN); 594 in->in_challenge = NULL; 595 } 596 if (status != 0) { 597 ieee80211_dbg(IEEE80211_MSG_DEBUG | 598 IEEE80211_MSG_AUTH, 599 "shared key auth failed (reason %d)\n", 600 status); 601 if (in != ic->ic_bss) 602 in->in_fails++; 603 return; 604 } 605 IEEE80211_UNLOCK(ic); 606 ieee80211_new_state(ic, IEEE80211_S_ASSOC, 607 wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK); 608 IEEE80211_LOCK(ic); 609 break; 610 case IEEE80211_AUTH_SHARED_CHALLENGE: 611 if (!ieee80211_alloc_challenge(in)) 612 return; 613 bcopy(&challenge[2], in->in_challenge, challenge[1]); 614 IEEE80211_UNLOCK(ic); 615 IEEE80211_SEND_MGMT(ic, in, IEEE80211_FC0_SUBTYPE_AUTH, 616 seq + 1); 617 IEEE80211_LOCK(ic); 618 break; 619 default: 620 ieee80211_dbg(IEEE80211_MSG_AUTH, "80211_auth_shared: " 621 "shared key auth: bad seq %d", seq); 622 return; 623 } 624 break; 625 626 default: 627 ieee80211_dbg(IEEE80211_MSG_AUTH, 628 "ieee80211_auth_shared: bad opmode %u\n", 629 ic->ic_opmode); 630 break; 631 } 632 return; 633 bad: 634 if (ic->ic_opmode == IEEE80211_M_STA) { 635 /* 636 * Kick the state machine. This short-circuits 637 * using the mgt frame timeout to trigger the 638 * state transition. 639 */ 640 if (ic->ic_state == IEEE80211_S_AUTH) { 641 IEEE80211_UNLOCK(ic); 642 ieee80211_new_state(ic, IEEE80211_S_SCAN, 0); 643 IEEE80211_LOCK(ic); 644 } 645 } 646 } 647 648 static int 649 iswpaoui(const uint8_t *frm) 650 { 651 uint32_t c = *(uint32_t *)(frm + 2); 652 return (frm[1] > 3 && c == ((WPA_OUI_TYPE << 24) | WPA_OUI)); 653 } 654 655 /* 656 * Process a beacon/probe response frame. 657 * When the device is in station mode, create a node and add it 658 * to the node database for a new ESS or update node info if it's 659 * already there. 660 */ 661 static void 662 ieee80211_recv_beacon(ieee80211com_t *ic, mblk_t *mp, struct ieee80211_node *in, 663 int subtype, int rssi, uint32_t rstamp) 664 { 665 ieee80211_impl_t *im = ic->ic_private; 666 struct ieee80211_frame *wh; 667 uint8_t *frm; 668 uint8_t *efrm; /* end of frame body */ 669 struct ieee80211_scanparams scan; 670 671 wh = (struct ieee80211_frame *)mp->b_rptr; 672 frm = (uint8_t *)&wh[1]; 673 efrm = (uint8_t *)mp->b_wptr; 674 675 /* 676 * We process beacon/probe response frames: 677 * o when scanning, or 678 * o station mode when associated (to collect state 679 * updates such as 802.11g slot time), or 680 * o adhoc mode (to discover neighbors) 681 * Frames otherwise received are discarded. 682 */ 683 if (!((ic->ic_flags & IEEE80211_F_SCAN) || 684 (ic->ic_opmode == IEEE80211_M_STA && in->in_associd != 0) || 685 ic->ic_opmode == IEEE80211_M_IBSS)) { 686 return; 687 } 688 689 /* 690 * beacon/probe response frame format 691 * [8] time stamp 692 * [2] beacon interval 693 * [2] capability information 694 * [tlv] ssid 695 * [tlv] supported rates 696 * [tlv] country information 697 * [tlv] parameter set (FH/DS) 698 * [tlv] erp information 699 * [tlv] extended supported rates 700 * [tlv] WME 701 * [tlv] WPA or RSN 702 */ 703 IEEE80211_VERIFY_LENGTH(efrm - frm, IEEE80211_BEACON_ELEM_MIN, return); 704 bzero(&scan, sizeof (scan)); 705 scan.tstamp = frm; 706 frm += 8; 707 scan.bintval = (*(uint16_t *)frm); 708 frm += 2; 709 scan.capinfo = (*(uint16_t *)frm); 710 frm += 2; 711 scan.bchan = ieee80211_chan2ieee(ic, ic->ic_curchan); 712 scan.chan = scan.bchan; 713 714 while (frm < efrm) { 715 /* Agere element in beacon */ 716 if ((*frm == IEEE80211_ELEMID_AGERE1) || 717 (*frm == IEEE80211_ELEMID_AGERE2)) { 718 frm = efrm; 719 break; 720 } 721 722 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1], return); 723 switch (*frm) { 724 case IEEE80211_ELEMID_SSID: 725 scan.ssid = frm; 726 break; 727 case IEEE80211_ELEMID_RATES: 728 scan.rates = frm; 729 break; 730 case IEEE80211_ELEMID_COUNTRY: 731 scan.country = frm; 732 break; 733 case IEEE80211_ELEMID_FHPARMS: 734 if (ic->ic_phytype == IEEE80211_T_FH) { 735 scan.fhdwell = LE_16(*(uint16_t *)(frm + 2)); 736 scan.chan = IEEE80211_FH_CHAN(frm[4], frm[5]); 737 scan.fhindex = frm[6]; 738 scan.phytype = IEEE80211_T_FH; 739 } 740 break; 741 case IEEE80211_ELEMID_DSPARMS: 742 if (ic->ic_phytype != IEEE80211_T_FH) { 743 scan.chan = frm[2]; 744 scan.phytype = IEEE80211_T_DS; 745 } 746 break; 747 case IEEE80211_ELEMID_TIM: 748 scan.tim = frm; 749 scan.timoff = frm - mp->b_rptr; 750 break; 751 case IEEE80211_ELEMID_IBSSPARMS: 752 break; 753 case IEEE80211_ELEMID_XRATES: 754 scan.xrates = frm; 755 break; 756 case IEEE80211_ELEMID_ERP: 757 if (frm[1] != 1) { 758 ieee80211_dbg(IEEE80211_MSG_ELEMID, 759 "ieee80211_recv_mgmt: ignore %s, " 760 "invalid ERP element; " 761 "length %u, expecting 1\n", 762 IEEE80211_SUBTYPE_NAME(subtype), 763 frm[1]); 764 break; 765 } 766 scan.erp = frm[2]; 767 scan.phytype = IEEE80211_T_OFDM; 768 break; 769 case IEEE80211_ELEMID_RSN: 770 scan.wpa = frm; 771 break; 772 case IEEE80211_ELEMID_VENDOR: 773 if (iswpaoui(frm)) 774 scan.wpa = frm; /* IEEE802.11i D3.0 */ 775 break; 776 default: 777 ieee80211_dbg(IEEE80211_MSG_ELEMID, 778 "ieee80211_recv_mgmt: ignore %s," 779 "unhandled id %u, len %u, totallen %u", 780 IEEE80211_SUBTYPE_NAME(subtype), 781 *frm, frm[1], 782 mp->b_wptr - mp->b_rptr); 783 break; 784 } 785 /* frm[1] - component length */ 786 frm += IEEE80211_ELEM_LEN(frm[1]); 787 } 788 IEEE80211_VERIFY_ELEMENT(scan.rates, IEEE80211_RATE_MAXSIZE, return); 789 IEEE80211_VERIFY_ELEMENT(scan.ssid, IEEE80211_NWID_LEN, return); 790 if (ieee80211_isclr(ic->ic_chan_active, scan.chan)) { 791 ieee80211_dbg(IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT, 792 "ieee80211_recv_mgmt: ignore %s ," 793 "invalid channel %u\n", 794 IEEE80211_SUBTYPE_NAME(subtype), scan.chan); 795 return; 796 } 797 if (scan.chan != scan.bchan && 798 ic->ic_phytype != IEEE80211_T_FH) { 799 /* 800 * Frame was received on a channel different from the 801 * one indicated in the DS params element id; 802 * silently discard it. 803 * 804 * NB: this can happen due to signal leakage. 805 * But we should take it for FH phy because 806 * the rssi value should be correct even for 807 * different hop pattern in FH. 808 */ 809 ieee80211_dbg(IEEE80211_MSG_ELEMID, 810 "ieee80211_recv_mgmt: ignore %s ," 811 "phytype %u channel %u marked for %u\n", 812 IEEE80211_SUBTYPE_NAME(subtype), 813 ic->ic_phytype, scan.bchan, scan.chan); 814 return; 815 } 816 if (!(IEEE80211_BINTVAL_MIN <= scan.bintval && 817 scan.bintval <= IEEE80211_BINTVAL_MAX)) { 818 ieee80211_dbg(IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT, 819 "ieee80211_recv_mgmt: ignore %s ," 820 "bogus beacon interval %u\n", 821 IEEE80211_SUBTYPE_NAME(subtype), scan.bintval); 822 return; 823 } 824 825 /* 826 * When operating in station mode, check for state updates. 827 * Be careful to ignore beacons received while doing a 828 * background scan. We consider only 11g/WMM stuff right now. 829 */ 830 if (ic->ic_opmode == IEEE80211_M_STA && 831 in->in_associd != 0 && 832 (!(ic->ic_flags & IEEE80211_F_SCAN) || 833 IEEE80211_ADDR_EQ(wh->i_addr2, in->in_bssid))) { 834 /* record tsf of last beacon */ 835 bcopy(scan.tstamp, in->in_tstamp.data, 836 sizeof (in->in_tstamp)); 837 /* count beacon frame for s/w bmiss handling */ 838 im->im_swbmiss_count++; 839 im->im_bmiss_count = 0; 840 841 if ((in->in_capinfo ^ scan.capinfo) & 842 IEEE80211_CAPINFO_SHORT_SLOTTIME) { 843 ieee80211_dbg(IEEE80211_MSG_ASSOC, 844 "ieee80211_recv_mgmt: " 845 "[%s] cap change: before 0x%x, now 0x%x\n", 846 ieee80211_macaddr_sprintf(wh->i_addr2), 847 in->in_capinfo, scan.capinfo); 848 /* 849 * NB: we assume short preamble doesn't 850 * change dynamically 851 */ 852 ieee80211_set_shortslottime(ic, 853 ic->ic_curmode == IEEE80211_MODE_11A || 854 (scan.capinfo & 855 IEEE80211_CAPINFO_SHORT_SLOTTIME)); 856 in->in_capinfo = scan.capinfo; 857 } 858 859 if (scan.tim != NULL) { 860 struct ieee80211_tim_ie *ie; 861 862 ie = (struct ieee80211_tim_ie *)scan.tim; 863 in->in_dtim_count = ie->tim_count; 864 in->in_dtim_period = ie->tim_period; 865 } 866 if (ic->ic_flags & IEEE80211_F_SCAN) { 867 ieee80211_add_scan(ic, &scan, wh, subtype, rssi, 868 rstamp); 869 } 870 return; 871 } 872 /* 873 * If scanning, just pass information to the scan module. 874 */ 875 if (ic->ic_flags & IEEE80211_F_SCAN) { 876 ieee80211_add_scan(ic, &scan, wh, subtype, rssi, rstamp); 877 return; 878 } 879 880 if (scan.capinfo & IEEE80211_CAPINFO_IBSS) { 881 if (!IEEE80211_ADDR_EQ(wh->i_addr2, in->in_macaddr)) { 882 /* 883 * Create a new entry in the neighbor table. 884 */ 885 in = ieee80211_add_neighbor(ic, wh, &scan); 886 } else if (in->in_capinfo == 0) { 887 /* 888 * Update faked node created on transmit. 889 * Note this also updates the tsf. 890 */ 891 ieee80211_init_neighbor(in, wh, &scan); 892 } else { 893 /* 894 * Record tsf for potential resync. 895 */ 896 bcopy(scan.tstamp, in->in_tstamp.data, 897 sizeof (in->in_tstamp)); 898 } 899 if (in != NULL) { 900 in->in_rssi = (uint8_t)rssi; 901 in->in_rstamp = rstamp; 902 } 903 } 904 } 905 906 /* 907 * Perform input processing for 802.11 management frames. 908 * It's the default ic_recv_mgmt callback function for the interface 909 * softc, ic. Tipically ic_recv_mgmt is called within ieee80211_input() 910 */ 911 void 912 ieee80211_recv_mgmt(ieee80211com_t *ic, mblk_t *mp, struct ieee80211_node *in, 913 int subtype, int rssi, uint32_t rstamp) 914 { 915 struct ieee80211_frame *wh; 916 uint8_t *frm; /* pointer to start of the frame */ 917 uint8_t *efrm; /* pointer to end of the frame */ 918 uint8_t *ssid; 919 uint8_t *rates; 920 uint8_t *xrates; /* extended rates */ 921 boolean_t allocbs = B_FALSE; 922 uint8_t rate; 923 uint16_t algo; /* authentication algorithm */ 924 uint16_t seq; /* sequence no */ 925 uint16_t status; 926 uint16_t capinfo; 927 uint16_t associd; /* association ID */ 928 929 IEEE80211_LOCK(ic); 930 wh = (struct ieee80211_frame *)mp->b_rptr; 931 frm = (uint8_t *)&wh[1]; 932 efrm = (uint8_t *)mp->b_wptr; 933 switch (subtype) { 934 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 935 case IEEE80211_FC0_SUBTYPE_BEACON: 936 ieee80211_recv_beacon(ic, mp, in, subtype, rssi, rstamp); 937 break; 938 939 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 940 if (ic->ic_opmode == IEEE80211_M_STA || 941 ic->ic_state != IEEE80211_S_RUN || 942 IEEE80211_IS_MULTICAST(wh->i_addr2)) { 943 break; 944 } 945 946 /* 947 * prreq frame format 948 * [tlv] ssid 949 * [tlv] supported rates 950 * [tlv] extended supported rates 951 */ 952 ssid = rates = xrates = NULL; 953 while (frm < efrm) { 954 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1], goto out); 955 switch (*frm) { 956 case IEEE80211_ELEMID_SSID: 957 ssid = frm; 958 break; 959 case IEEE80211_ELEMID_RATES: 960 rates = frm; 961 break; 962 case IEEE80211_ELEMID_XRATES: 963 xrates = frm; 964 break; 965 } 966 frm += frm[1] + 2; 967 } 968 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, break); 969 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, break); 970 IEEE80211_VERIFY_SSID(ic->ic_bss, ssid, break); 971 if ((ic->ic_flags & IEEE80211_F_HIDESSID) && ssid[1] == 0) { 972 ieee80211_dbg(IEEE80211_MSG_INPUT, 973 "ieee80211_recv_mgmt: ignore %s, " 974 "no ssid with ssid suppression enabled", 975 IEEE80211_SUBTYPE_NAME(subtype)); 976 break; 977 } 978 979 if (in == ic->ic_bss) { 980 if (ic->ic_opmode != IEEE80211_M_IBSS) { 981 in = ieee80211_tmp_node(ic, wh->i_addr2); 982 allocbs = B_TRUE; 983 } else if (!IEEE80211_ADDR_EQ(wh->i_addr2, 984 in->in_macaddr)) { 985 /* 986 * Cannot tell if the sender is operating 987 * in ibss mode. But we need a new node to 988 * send the response so blindly add them to the 989 * neighbor table. 990 */ 991 in = ieee80211_fakeup_adhoc_node(&ic->ic_sta, 992 wh->i_addr2); 993 } 994 if (in == NULL) 995 break; 996 } 997 ieee80211_dbg(IEEE80211_MSG_ASSOC, "ieee80211_recv_mgmt: " 998 "[%s] recv probe req\n", 999 ieee80211_macaddr_sprintf(wh->i_addr2)); 1000 in->in_rssi = (uint8_t)rssi; 1001 in->in_rstamp = rstamp; 1002 /* 1003 * Adjust and check station's rate list with device's 1004 * supported rate. Send back response if there is at 1005 * least one rate or the fixed rate(if being set) is 1006 * supported by both station and the device 1007 */ 1008 rate = ieee80211_setup_rates(in, rates, xrates, 1009 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1010 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1011 if (rate & IEEE80211_RATE_BASIC) { 1012 ieee80211_dbg(IEEE80211_MSG_XRATE, "ieee80211_recv_mgmt" 1013 "%s recv'd rate set invalid", 1014 IEEE80211_SUBTYPE_NAME(subtype)); 1015 } else { 1016 IEEE80211_UNLOCK(ic); 1017 IEEE80211_SEND_MGMT(ic, in, 1018 IEEE80211_FC0_SUBTYPE_PROBE_RESP, 0); 1019 IEEE80211_LOCK(ic); 1020 } 1021 if (allocbs) { 1022 /* 1023 * Temporary node created just to send a 1024 * response, reclaim immediately. 1025 */ 1026 ieee80211_free_node(in); 1027 } 1028 break; 1029 1030 case IEEE80211_FC0_SUBTYPE_AUTH: 1031 /* 1032 * auth frame format 1033 * [2] algorithm 1034 * [2] sequence 1035 * [2] status 1036 * [tlv*] challenge 1037 */ 1038 IEEE80211_VERIFY_LENGTH(efrm - frm, IEEE80211_AUTH_ELEM_MIN, 1039 break); 1040 algo = (*(uint16_t *)frm); 1041 seq = (*(uint16_t *)(frm + 2)); 1042 status = (*(uint16_t *)(frm + 4)); 1043 ieee80211_dbg(IEEE80211_MSG_AUTH, "ieee80211_recv_mgmt: " 1044 "[%s] recv auth frame with algorithm %d seq %d\n", 1045 ieee80211_macaddr_sprintf(wh->i_addr2), algo, seq); 1046 1047 if (ic->ic_flags & IEEE80211_F_COUNTERM) { 1048 ieee80211_dbg(IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO, 1049 "ieee80211_recv_mgmt: ignore auth, %s\n", 1050 "TKIP countermeasures enabled"); 1051 break; 1052 } 1053 switch (algo) { 1054 case IEEE80211_AUTH_ALG_SHARED: 1055 ieee80211_auth_shared(ic, wh, frm + 6, efrm, in, 1056 seq, status); 1057 break; 1058 case IEEE80211_AUTH_ALG_OPEN: 1059 ieee80211_auth_open(ic, wh, in, seq, status); 1060 break; 1061 default: 1062 ieee80211_dbg(IEEE80211_MSG_ANY, "ieee80211_recv_mgmt: " 1063 "ignore auth, unsupported alg %d", algo); 1064 break; 1065 } 1066 break; 1067 1068 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 1069 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 1070 if (ic->ic_opmode != IEEE80211_M_STA || 1071 ic->ic_state != IEEE80211_S_ASSOC) 1072 break; 1073 1074 /* 1075 * asresp frame format 1076 * [2] capability information 1077 * [2] status 1078 * [2] association ID 1079 * [tlv] supported rates 1080 * [tlv] extended supported rates 1081 * [tlv] WME 1082 */ 1083 IEEE80211_VERIFY_LENGTH(efrm - frm, 1084 IEEE80211_ASSOC_RESP_ELEM_MIN, break); 1085 in = ic->ic_bss; 1086 capinfo = (*(uint16_t *)frm); 1087 frm += 2; 1088 status = (*(uint16_t *)frm); 1089 frm += 2; 1090 if (status != 0) { 1091 ieee80211_dbg(IEEE80211_MSG_ASSOC, 1092 "assoc failed (reason %d)\n", status); 1093 in = ieee80211_find_node(&ic->ic_scan, wh->i_addr2); 1094 if (in != NULL) { 1095 in->in_fails++; 1096 ieee80211_free_node(in); 1097 } 1098 break; 1099 } 1100 associd = (*(uint16_t *)frm); 1101 frm += 2; 1102 1103 rates = xrates = NULL; 1104 while (frm < efrm) { 1105 /* 1106 * Do not discard frames containing proprietary Agere 1107 * elements 128 and 129, as the reported element length 1108 * is often wrong. Skip rest of the frame, since we can 1109 * not rely on the given element length making it 1110 * impossible to know where the next element starts 1111 */ 1112 if ((*frm == IEEE80211_ELEMID_AGERE1) || 1113 (*frm == IEEE80211_ELEMID_AGERE2)) { 1114 frm = efrm; 1115 break; 1116 } 1117 1118 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1], goto out); 1119 switch (*frm) { 1120 case IEEE80211_ELEMID_RATES: 1121 rates = frm; 1122 break; 1123 case IEEE80211_ELEMID_XRATES: 1124 xrates = frm; 1125 break; 1126 } 1127 frm += frm[1] + 2; 1128 } 1129 1130 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, break); 1131 /* 1132 * Adjust and check AP's rate list with device's 1133 * supported rate. Re-start scan if no rate is or the 1134 * fixed rate(if being set) cannot be supported by 1135 * either AP or the device. 1136 */ 1137 rate = ieee80211_setup_rates(in, rates, xrates, 1138 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1139 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1140 if (rate & IEEE80211_RATE_BASIC) { 1141 ieee80211_dbg(IEEE80211_MSG_ASSOC, 1142 "assoc failed (rate set mismatch)\n"); 1143 if (in != ic->ic_bss) 1144 in->in_fails++; 1145 IEEE80211_UNLOCK(ic); 1146 ieee80211_new_state(ic, IEEE80211_S_SCAN, 0); 1147 return; 1148 } 1149 1150 in->in_capinfo = capinfo; 1151 in->in_associd = associd; 1152 in->in_flags &= ~IEEE80211_NODE_QOS; 1153 /* 1154 * Configure state now that we are associated. 1155 */ 1156 if (ic->ic_curmode == IEEE80211_MODE_11A || 1157 (in->in_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1158 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 1159 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 1160 } else { 1161 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 1162 ic->ic_flags |= IEEE80211_F_USEBARKER; 1163 } 1164 ieee80211_set_shortslottime(ic, 1165 ic->ic_curmode == IEEE80211_MODE_11A || 1166 (in->in_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1167 /* 1168 * Honor ERP protection. 1169 * 1170 * NB: in_erp should zero for non-11g operation. 1171 * check ic_curmode anyway 1172 */ 1173 if (ic->ic_curmode == IEEE80211_MODE_11G && 1174 (in->in_erp & IEEE80211_ERP_USE_PROTECTION)) 1175 ic->ic_flags |= IEEE80211_F_USEPROT; 1176 else 1177 ic->ic_flags &= ~IEEE80211_F_USEPROT; 1178 ieee80211_dbg(IEEE80211_MSG_ASSOC, 1179 "assoc success: %s preamble, %s slot time%s%s\n", 1180 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 1181 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 1182 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "", 1183 in->in_flags & IEEE80211_NODE_QOS ? ", QoS" : ""); 1184 IEEE80211_UNLOCK(ic); 1185 ieee80211_new_state(ic, IEEE80211_S_RUN, subtype); 1186 return; 1187 1188 case IEEE80211_FC0_SUBTYPE_DEAUTH: 1189 if (ic->ic_state == IEEE80211_S_SCAN) 1190 break; 1191 1192 /* 1193 * deauth frame format 1194 * [2] reason 1195 */ 1196 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, break); 1197 status = (*(uint16_t *)frm); 1198 1199 ieee80211_dbg(IEEE80211_MSG_AUTH, 1200 "recv deauthenticate (reason %d)\n", status); 1201 switch (ic->ic_opmode) { 1202 case IEEE80211_M_STA: 1203 IEEE80211_UNLOCK(ic); 1204 ieee80211_new_state(ic, IEEE80211_S_AUTH, 1205 wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK); 1206 return; 1207 default: 1208 break; 1209 } 1210 break; 1211 1212 case IEEE80211_FC0_SUBTYPE_DISASSOC: 1213 if (ic->ic_state != IEEE80211_S_RUN && 1214 ic->ic_state != IEEE80211_S_ASSOC && 1215 ic->ic_state != IEEE80211_S_AUTH) 1216 break; 1217 /* 1218 * disassoc frame format 1219 * [2] reason 1220 */ 1221 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, break); 1222 status = (*(uint16_t *)frm); 1223 1224 ieee80211_dbg(IEEE80211_MSG_ASSOC, 1225 "recv disassociate (reason %d)\n", status); 1226 switch (ic->ic_opmode) { 1227 case IEEE80211_M_STA: 1228 IEEE80211_UNLOCK(ic); 1229 ieee80211_new_state(ic, IEEE80211_S_ASSOC, 1230 wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK); 1231 return; 1232 default: 1233 break; 1234 } 1235 break; 1236 1237 default: 1238 ieee80211_dbg(IEEE80211_MSG_ANY, "ieee80211_recv_mgmt: " 1239 "subtype 0x%x not handled\n", subtype); 1240 break; 1241 } /* switch subtype */ 1242 out: 1243 IEEE80211_UNLOCK(ic); 1244 } 1245