1 /* 2 * Copyright 2008 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 <sys/strsun.h> 46 #include "net80211_impl.h" 47 48 static mblk_t *ieee80211_defrag(ieee80211com_t *, ieee80211_node_t *, 49 mblk_t *, int); 50 51 /* 52 * Process a received frame. The node associated with the sender 53 * should be supplied. If nothing was found in the node table then 54 * the caller is assumed to supply a reference to ic_bss instead. 55 * The RSSI and a timestamp are also supplied. The RSSI data is used 56 * during AP scanning to select a AP to associate with; it can have 57 * any units so long as values have consistent units and higher values 58 * mean ``better signal''. The receive timestamp is currently not used 59 * by the 802.11 layer. 60 */ 61 int 62 ieee80211_input(ieee80211com_t *ic, mblk_t *mp, struct ieee80211_node *in, 63 int32_t rssi, uint32_t rstamp) 64 { 65 struct ieee80211_frame *wh; 66 struct ieee80211_key *key; 67 uint8_t *bssid; 68 int hdrspace; 69 int len; 70 uint16_t rxseq; 71 uint8_t dir; 72 uint8_t type; 73 uint8_t subtype; 74 uint8_t tid; 75 76 ASSERT(in != NULL); 77 type = (uint8_t)-1; /* undefined */ 78 len = MBLKL(mp); 79 if (len < sizeof (struct ieee80211_frame_min)) { 80 ieee80211_dbg(IEEE80211_MSG_ANY, "ieee80211_input: " 81 "too short (1): len %u", len); 82 goto out; 83 } 84 /* 85 * Bit of a cheat here, we use a pointer for a 3-address 86 * frame format but don't reference fields past outside 87 * ieee80211_frame_min w/o first validating the data is 88 * present. 89 */ 90 wh = (struct ieee80211_frame *)mp->b_rptr; 91 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 92 IEEE80211_FC0_VERSION_0) { 93 ieee80211_dbg(IEEE80211_MSG_ANY, "ieee80211_input: " 94 "discard pkt with wrong version %x", wh->i_fc[0]); 95 goto out; 96 } 97 98 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 99 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 100 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 101 102 IEEE80211_LOCK(ic); 103 if (!(ic->ic_flags & IEEE80211_F_SCAN)) { 104 switch (ic->ic_opmode) { 105 case IEEE80211_M_STA: 106 bssid = wh->i_addr2; 107 if (!IEEE80211_ADDR_EQ(bssid, in->in_bssid)) 108 goto out_exit_mutex; 109 break; 110 case IEEE80211_M_IBSS: 111 case IEEE80211_M_AHDEMO: 112 if (dir != IEEE80211_FC1_DIR_NODS) { 113 bssid = wh->i_addr1; 114 } else if (type == IEEE80211_FC0_TYPE_CTL) { 115 bssid = wh->i_addr1; 116 } else { 117 if (len < sizeof (struct ieee80211_frame)) { 118 ieee80211_dbg(IEEE80211_MSG_ANY, 119 "ieee80211_input: too short(2):" 120 "len %u\n", len); 121 goto out_exit_mutex; 122 } 123 bssid = wh->i_addr3; 124 } 125 if (type != IEEE80211_FC0_TYPE_DATA) 126 break; 127 /* 128 * Data frame, validate the bssid. 129 */ 130 if (!IEEE80211_ADDR_EQ(bssid, ic->ic_bss->in_bssid) && 131 !IEEE80211_ADDR_EQ(bssid, wifi_bcastaddr)) { 132 /* not interested in */ 133 ieee80211_dbg(IEEE80211_MSG_INPUT, 134 "ieee80211_input: not to bss %s\n", 135 ieee80211_macaddr_sprintf(bssid)); 136 goto out_exit_mutex; 137 } 138 /* 139 * For adhoc mode we cons up a node when it doesn't 140 * exist. This should probably done after an ACL check. 141 */ 142 if (in == ic->ic_bss && 143 ic->ic_opmode != IEEE80211_M_HOSTAP && 144 !IEEE80211_ADDR_EQ(wh->i_addr2, in->in_macaddr)) { 145 /* 146 * Fake up a node for this newly 147 * discovered member of the IBSS. 148 */ 149 in = ieee80211_fakeup_adhoc_node(&ic->ic_sta, 150 wh->i_addr2); 151 if (in == NULL) { 152 /* NB: stat kept for alloc failure */ 153 goto out_exit_mutex; 154 } 155 } 156 break; 157 default: 158 goto out_exit_mutex; 159 } 160 in->in_rssi = (uint8_t)rssi; 161 in->in_rstamp = rstamp; 162 if (!(type & IEEE80211_FC0_TYPE_CTL)) { 163 tid = 0; 164 rxseq = (*(uint16_t *)wh->i_seq); 165 if ((wh->i_fc[1] & IEEE80211_FC1_RETRY) && 166 (rxseq - in->in_rxseqs[tid]) <= 0) { 167 /* duplicate, discard */ 168 ieee80211_dbg(IEEE80211_MSG_INPUT, 169 "ieee80211_input: duplicate", 170 "seqno <%u,%u> fragno <%u,%u> tid %u", 171 rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 172 in->in_rxseqs[tid] >> 173 IEEE80211_SEQ_SEQ_SHIFT, 174 rxseq & IEEE80211_SEQ_FRAG_MASK, 175 in->in_rxseqs[tid] & 176 IEEE80211_SEQ_FRAG_MASK, 177 tid); 178 ic->ic_stats.is_rx_dups++; 179 goto out_exit_mutex; 180 } 181 in->in_rxseqs[tid] = rxseq; 182 } 183 in->in_inact = 0; 184 } 185 186 hdrspace = ieee80211_hdrspace(wh); 187 switch (type) { 188 case IEEE80211_FC0_TYPE_DATA: 189 if (len < hdrspace) { 190 ieee80211_dbg(IEEE80211_MSG_ANY, "ieee80211_input: " 191 "data too short: expecting %u", hdrspace); 192 goto out_exit_mutex; 193 } 194 switch (ic->ic_opmode) { 195 case IEEE80211_M_STA: 196 if (dir != IEEE80211_FC1_DIR_FROMDS) { 197 ieee80211_dbg(IEEE80211_MSG_INPUT, 198 "ieee80211_input: data ", 199 "unknown dir 0x%x", dir); 200 goto out_exit_mutex; 201 } 202 if (IEEE80211_IS_MULTICAST(wh->i_addr1) && 203 IEEE80211_ADDR_EQ(wh->i_addr3, ic->ic_macaddr)) { 204 /* 205 * In IEEE802.11 network, multicast packet 206 * sent from me is broadcasted from AP. 207 * It should be silently discarded for 208 * SIMPLEX interface. 209 */ 210 ieee80211_dbg(IEEE80211_MSG_INPUT, 211 "ieee80211_input: multicast echo\n"); 212 goto out_exit_mutex; 213 } 214 break; 215 case IEEE80211_M_IBSS: 216 case IEEE80211_M_AHDEMO: 217 if (dir != IEEE80211_FC1_DIR_NODS) { 218 ieee80211_dbg(IEEE80211_MSG_INPUT, 219 "ieee80211_input: unknown dir 0x%x", 220 dir); 221 goto out_exit_mutex; 222 } 223 break; 224 default: 225 ieee80211_err("ieee80211_input: " 226 "receive data, unknown opmode %u, skip\n", 227 ic->ic_opmode); 228 goto out_exit_mutex; 229 } 230 231 /* 232 * Handle privacy requirements. 233 */ 234 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 235 if ((ic->ic_flags & IEEE80211_F_PRIVACY) == 0) { 236 /* 237 * Discard encrypted frames when privacy off. 238 */ 239 ieee80211_dbg(IEEE80211_MSG_INPUT, 240 "ieee80211_input: ""WEP PRIVACY off"); 241 ic->ic_stats.is_wep_errors++; 242 goto out_exit_mutex; 243 } 244 key = ieee80211_crypto_decap(ic, mp, hdrspace); 245 if (key == NULL) { 246 /* NB: stats+msgs handled in crypto_decap */ 247 ic->ic_stats.is_wep_errors++; 248 goto out_exit_mutex; 249 } 250 wh = (struct ieee80211_frame *)mp->b_rptr; 251 wh->i_fc[1] &= ~IEEE80211_FC1_WEP; 252 } else { 253 key = NULL; 254 } 255 256 /* 257 * Next up, any fragmentation 258 */ 259 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 260 mp = ieee80211_defrag(ic, in, mp, hdrspace); 261 if (mp == NULL) { 262 /* Fragment dropped or frame not complete yet */ 263 goto out_exit_mutex; 264 } 265 } 266 wh = NULL; /* no longer valid, catch any uses */ 267 268 /* 269 * Next strip any MSDU crypto bits. 270 */ 271 if (key != NULL && !ieee80211_crypto_demic(ic, key, mp, 0)) { 272 ieee80211_dbg(IEEE80211_MSG_INPUT, "ieee80211_input: " 273 "data demic error\n"); 274 goto out_exit_mutex; 275 } 276 277 ic->ic_stats.is_rx_frags++; 278 ic->ic_stats.is_rx_bytes += len; 279 IEEE80211_UNLOCK(ic); 280 mac_rx(ic->ic_mach, NULL, mp); 281 return (IEEE80211_FC0_TYPE_DATA); 282 283 case IEEE80211_FC0_TYPE_MGT: 284 if (dir != IEEE80211_FC1_DIR_NODS) 285 goto out_exit_mutex; 286 if (len < sizeof (struct ieee80211_frame)) 287 goto out_exit_mutex; 288 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 289 if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) { 290 /* 291 * Only shared key auth frames with a challenge 292 * should be encrypted, discard all others. 293 */ 294 ieee80211_dbg(IEEE80211_MSG_INPUT, 295 "ieee80211_input: " 296 "%s WEP set but not permitted", 297 IEEE80211_SUBTYPE_NAME(subtype)); 298 ic->ic_stats.is_wep_errors++; 299 goto out_exit_mutex; 300 } 301 if ((ic->ic_flags & IEEE80211_F_PRIVACY) == 0) { 302 /* 303 * Discard encrypted frames when privacy off. 304 */ 305 ieee80211_dbg(IEEE80211_MSG_INPUT, 306 "ieee80211_input: " 307 "mgt WEP set but PRIVACY off"); 308 ic->ic_stats.is_wep_errors++; 309 goto out_exit_mutex; 310 } 311 key = ieee80211_crypto_decap(ic, mp, hdrspace); 312 if (key == NULL) { 313 /* NB: stats+msgs handled in crypto_decap */ 314 goto out_exit_mutex; 315 } 316 wh = (struct ieee80211_frame *)mp->b_rptr; 317 wh->i_fc[1] &= ~IEEE80211_FC1_WEP; 318 } 319 IEEE80211_UNLOCK(ic); 320 ic->ic_recv_mgmt(ic, mp, in, subtype, rssi, rstamp); 321 goto out; 322 323 case IEEE80211_FC0_TYPE_CTL: 324 default: 325 ieee80211_dbg(IEEE80211_MSG_ANY, "ieee80211_input: " 326 "bad frame type 0x%x", type); 327 /* should not come here */ 328 break; 329 } 330 out_exit_mutex: 331 IEEE80211_UNLOCK(ic); 332 out: 333 if (mp != NULL) 334 freemsg(mp); 335 336 return (type); 337 } 338 339 /* 340 * This function reassemble fragments. 341 * More fragments bit in the frame control means the packet is fragmented. 342 * While the sequence control field consists of 4-bit fragment number 343 * field and a 12-bit sequence number field. 344 */ 345 /* ARGSUSED */ 346 static mblk_t * 347 ieee80211_defrag(ieee80211com_t *ic, struct ieee80211_node *in, mblk_t *mp, 348 int hdrspace) 349 { 350 struct ieee80211_frame *wh = (struct ieee80211_frame *)mp->b_rptr; 351 struct ieee80211_frame *lwh; 352 mblk_t *mfrag; 353 uint16_t rxseq; 354 uint8_t fragno; 355 uint8_t more_frag; 356 357 ASSERT(!IEEE80211_IS_MULTICAST(wh->i_addr1)); 358 more_frag = wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG; 359 rxseq = LE_16(*(uint16_t *)wh->i_seq); 360 fragno = rxseq & IEEE80211_SEQ_FRAG_MASK; 361 362 /* Quick way out, if there's nothing to defragment */ 363 if (!more_frag && fragno == 0 && in->in_rxfrag == NULL) 364 return (mp); 365 366 /* 367 * Remove frag to insure it doesn't get reaped by timer. 368 */ 369 if (in->in_table == NULL) { 370 /* 371 * Should never happen. If the node is orphaned (not in 372 * the table) then input packets should not reach here. 373 * Otherwise, a concurrent request that yanks the table 374 * should be blocked by other interlocking and/or by first 375 * shutting the driver down. Regardless, be defensive 376 * here and just bail 377 */ 378 freemsg(mp); 379 return (NULL); 380 } 381 IEEE80211_NODE_LOCK(in->in_table); 382 mfrag = in->in_rxfrag; 383 in->in_rxfrag = NULL; 384 IEEE80211_NODE_UNLOCK(in->in_table); 385 386 /* 387 * Validate new fragment is in order and 388 * related to the previous ones. 389 */ 390 if (mfrag != NULL) { 391 uint16_t last_rxseq; 392 393 lwh = (struct ieee80211_frame *)mfrag->b_rptr; 394 last_rxseq = LE_16(*(uint16_t *)lwh->i_seq); 395 /* 396 * Sequence control field contains 12-bit sequence no 397 * and 4-bit fragment number. For fragemnts, the 398 * sequence no is not changed. 399 * NB: check seq # and frag together 400 */ 401 if (rxseq != last_rxseq + 1 || 402 !IEEE80211_ADDR_EQ(wh->i_addr1, lwh->i_addr1) || 403 !IEEE80211_ADDR_EQ(wh->i_addr2, lwh->i_addr2)) { 404 /* 405 * Unrelated fragment or no space for it, 406 * clear current fragments. 407 */ 408 freemsg(mfrag); 409 mfrag = NULL; 410 } 411 } 412 413 if (mfrag == NULL) { 414 if (fragno != 0) { /* !first fragment, discard */ 415 freemsg(mp); 416 return (NULL); 417 } 418 mfrag = mp; 419 } else { /* concatenate */ 420 (void) adjmsg(mp, hdrspace); 421 linkb(mfrag, mp); 422 /* track last seqnum and fragno */ 423 lwh = (struct ieee80211_frame *)mfrag->b_rptr; 424 *(uint16_t *)lwh->i_seq = *(uint16_t *)wh->i_seq; 425 } 426 if (more_frag != 0) { /* more to come, save */ 427 in->in_rxfragstamp = ddi_get_lbolt(); 428 in->in_rxfrag = mfrag; 429 mfrag = NULL; 430 } 431 432 return (mfrag); 433 } 434 435 /* 436 * Install received rate set information in the node's state block. 437 */ 438 int 439 ieee80211_setup_rates(struct ieee80211_node *in, const uint8_t *rates, 440 const uint8_t *xrates, int flags) 441 { 442 struct ieee80211_rateset *rs = &in->in_rates; 443 444 bzero(rs, sizeof (*rs)); 445 rs->ir_nrates = rates[1]; 446 /* skip 1 byte element ID and 1 byte length */ 447 bcopy(rates + 2, rs->ir_rates, rs->ir_nrates); 448 if (xrates != NULL) { 449 uint8_t nxrates; 450 451 /* 452 * Tack on 11g extended supported rate element. 453 */ 454 nxrates = xrates[1]; 455 if (rs->ir_nrates + nxrates > IEEE80211_RATE_MAXSIZE) { 456 nxrates = IEEE80211_RATE_MAXSIZE - rs->ir_nrates; 457 ieee80211_dbg(IEEE80211_MSG_XRATE, 458 "ieee80211_setup_rates: %s", 459 "[%s] extended rate set too large;" 460 " only using %u of %u rates\n", 461 ieee80211_macaddr_sprintf(in->in_macaddr), 462 nxrates, xrates[1]); 463 } 464 bcopy(xrates + 2, rs->ir_rates + rs->ir_nrates, nxrates); 465 rs->ir_nrates += nxrates; 466 } 467 return (ieee80211_fix_rate(in, flags)); 468 } 469 470 /* 471 * Process open-system authentication response frame and start 472 * association if the authentication request is accepted. 473 */ 474 static void 475 ieee80211_auth_open(ieee80211com_t *ic, struct ieee80211_frame *wh, 476 struct ieee80211_node *in, uint16_t seq, uint16_t status) 477 { 478 IEEE80211_LOCK_ASSERT(ic); 479 if (in->in_authmode == IEEE80211_AUTH_SHARED) { 480 ieee80211_dbg(IEEE80211_MSG_AUTH, 481 "open auth: bad sta auth mode %u", in->in_authmode); 482 return; 483 } 484 if (ic->ic_opmode == IEEE80211_M_STA) { 485 if (ic->ic_state != IEEE80211_S_AUTH || 486 seq != IEEE80211_AUTH_OPEN_RESPONSE) { 487 return; 488 } 489 IEEE80211_UNLOCK(ic); 490 if (status != 0) { 491 ieee80211_dbg(IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 492 "open auth failed (reason %d)\n", status); 493 if (in != ic->ic_bss) 494 in->in_fails++; 495 ieee80211_new_state(ic, IEEE80211_S_SCAN, 0); 496 } else { 497 /* i_fc[0] - frame control's type & subtype field */ 498 ieee80211_new_state(ic, IEEE80211_S_ASSOC, 499 wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK); 500 } 501 IEEE80211_LOCK(ic); 502 } else { 503 ieee80211_dbg(IEEE80211_MSG_AUTH, "ieee80211_auth_open: " 504 "bad operating mode %u", ic->ic_opmode); 505 } 506 } 507 508 /* 509 * Allocate challenge text for use by shared-key authentication 510 * Return B_TRUE on success, B_FALST otherwise. 511 */ 512 static boolean_t 513 ieee80211_alloc_challenge(struct ieee80211_node *in) 514 { 515 if (in->in_challenge == NULL) { 516 in->in_challenge = kmem_alloc(IEEE80211_CHALLENGE_LEN, 517 KM_NOSLEEP); 518 } 519 if (in->in_challenge == NULL) { 520 ieee80211_dbg(IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 521 "[%s] shared key challenge alloc failed\n", 522 ieee80211_macaddr_sprintf(in->in_macaddr)); 523 } 524 return (in->in_challenge != NULL); 525 } 526 527 /* 528 * Process shared-key authentication response frames. If authentication 529 * succeeds, start association; otherwise, restart scan. 530 */ 531 static void 532 ieee80211_auth_shared(ieee80211com_t *ic, struct ieee80211_frame *wh, 533 uint8_t *frm, uint8_t *efrm, struct ieee80211_node *in, uint16_t seq, 534 uint16_t status) 535 { 536 uint8_t *challenge; 537 538 /* 539 * Pre-shared key authentication is evil; accept 540 * it only if explicitly configured (it is supported 541 * mainly for compatibility with clients like OS X). 542 */ 543 IEEE80211_LOCK_ASSERT(ic); 544 if (in->in_authmode != IEEE80211_AUTH_AUTO && 545 in->in_authmode != IEEE80211_AUTH_SHARED) { 546 ieee80211_dbg(IEEE80211_MSG_AUTH, "ieee80211_auth_shared: " 547 "bad sta auth mode %u", in->in_authmode); 548 goto bad; 549 } 550 551 challenge = NULL; 552 if (frm + 1 < efrm) { 553 /* 554 * Challenge text information element 555 * frm[0] - element ID 556 * frm[1] - length 557 * frm[2]... - challenge text 558 */ 559 if ((frm[1] + 2) > (_PTRDIFF(efrm, frm))) { 560 ieee80211_dbg(IEEE80211_MSG_AUTH, 561 "ieee80211_auth_shared: ie %d%d too long\n", 562 frm[0], (frm[1] + 2) - (_PTRDIFF(efrm, frm))); 563 goto bad; 564 } 565 if (*frm == IEEE80211_ELEMID_CHALLENGE) 566 challenge = frm; 567 frm += frm[1] + 2; 568 } 569 switch (seq) { 570 case IEEE80211_AUTH_SHARED_CHALLENGE: 571 case IEEE80211_AUTH_SHARED_RESPONSE: 572 if (challenge == NULL) { 573 ieee80211_dbg(IEEE80211_MSG_AUTH, 574 "ieee80211_auth_shared: no challenge\n"); 575 goto bad; 576 } 577 if (challenge[1] != IEEE80211_CHALLENGE_LEN) { 578 ieee80211_dbg(IEEE80211_MSG_AUTH, 579 "ieee80211_auth_shared: bad challenge len %d\n", 580 challenge[1]); 581 goto bad; 582 } 583 default: 584 break; 585 } 586 switch (ic->ic_opmode) { 587 case IEEE80211_M_STA: 588 if (ic->ic_state != IEEE80211_S_AUTH) 589 return; 590 switch (seq) { 591 case IEEE80211_AUTH_SHARED_PASS: 592 if (in->in_challenge != NULL) { 593 kmem_free(in->in_challenge, 594 IEEE80211_CHALLENGE_LEN); 595 in->in_challenge = NULL; 596 } 597 if (status != 0) { 598 ieee80211_dbg(IEEE80211_MSG_DEBUG | 599 IEEE80211_MSG_AUTH, 600 "shared key auth failed (reason %d)\n", 601 status); 602 if (in != ic->ic_bss) 603 in->in_fails++; 604 return; 605 } 606 IEEE80211_UNLOCK(ic); 607 ieee80211_new_state(ic, IEEE80211_S_ASSOC, 608 wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK); 609 IEEE80211_LOCK(ic); 610 break; 611 case IEEE80211_AUTH_SHARED_CHALLENGE: 612 if (!ieee80211_alloc_challenge(in)) 613 return; 614 bcopy(&challenge[2], in->in_challenge, challenge[1]); 615 IEEE80211_UNLOCK(ic); 616 IEEE80211_SEND_MGMT(ic, in, IEEE80211_FC0_SUBTYPE_AUTH, 617 seq + 1); 618 IEEE80211_LOCK(ic); 619 break; 620 default: 621 ieee80211_dbg(IEEE80211_MSG_AUTH, "80211_auth_shared: " 622 "shared key auth: bad seq %d", seq); 623 return; 624 } 625 break; 626 627 default: 628 ieee80211_dbg(IEEE80211_MSG_AUTH, 629 "ieee80211_auth_shared: bad opmode %u\n", 630 ic->ic_opmode); 631 break; 632 } 633 return; 634 bad: 635 if (ic->ic_opmode == IEEE80211_M_STA) { 636 /* 637 * Kick the state machine. This short-circuits 638 * using the mgt frame timeout to trigger the 639 * state transition. 640 */ 641 if (ic->ic_state == IEEE80211_S_AUTH) { 642 IEEE80211_UNLOCK(ic); 643 ieee80211_new_state(ic, IEEE80211_S_SCAN, 0); 644 IEEE80211_LOCK(ic); 645 } 646 } 647 } 648 649 static int 650 iswpaoui(const uint8_t *frm) 651 { 652 uint32_t c = *(uint32_t *)(frm + 2); 653 return (frm[1] > 3 && c == ((WPA_OUI_TYPE << 24) | WPA_OUI)); 654 } 655 656 /* 657 * Process a beacon/probe response frame. 658 * When the device is in station mode, create a node and add it 659 * to the node database for a new ESS or update node info if it's 660 * already there. 661 */ 662 static void 663 ieee80211_recv_beacon(ieee80211com_t *ic, mblk_t *mp, struct ieee80211_node *in, 664 int subtype, int rssi, uint32_t rstamp) 665 { 666 ieee80211_impl_t *im = ic->ic_private; 667 struct ieee80211_frame *wh; 668 uint8_t *frm; 669 uint8_t *efrm; /* end of frame body */ 670 struct ieee80211_scanparams scan; 671 672 wh = (struct ieee80211_frame *)mp->b_rptr; 673 frm = (uint8_t *)&wh[1]; 674 efrm = (uint8_t *)mp->b_wptr; 675 676 /* 677 * We process beacon/probe response frames: 678 * o when scanning, or 679 * o station mode when associated (to collect state 680 * updates such as 802.11g slot time), or 681 * o adhoc mode (to discover neighbors) 682 * Frames otherwise received are discarded. 683 */ 684 if (!((ic->ic_flags & IEEE80211_F_SCAN) || 685 (ic->ic_opmode == IEEE80211_M_STA && in->in_associd != 0) || 686 ic->ic_opmode == IEEE80211_M_IBSS)) { 687 return; 688 } 689 690 /* 691 * beacon/probe response frame format 692 * [8] time stamp 693 * [2] beacon interval 694 * [2] capability information 695 * [tlv] ssid 696 * [tlv] supported rates 697 * [tlv] country information 698 * [tlv] parameter set (FH/DS) 699 * [tlv] erp information 700 * [tlv] extended supported rates 701 * [tlv] WME 702 * [tlv] WPA or RSN 703 */ 704 IEEE80211_VERIFY_LENGTH(_PTRDIFF(efrm, frm), 705 IEEE80211_BEACON_ELEM_MIN, return); 706 bzero(&scan, sizeof (scan)); 707 scan.tstamp = frm; 708 frm += 8; 709 scan.bintval = (*(uint16_t *)frm); 710 frm += 2; 711 scan.capinfo = (*(uint16_t *)frm); 712 frm += 2; 713 scan.bchan = ieee80211_chan2ieee(ic, ic->ic_curchan); 714 scan.chan = scan.bchan; 715 716 while (frm < efrm) { 717 /* Agere element in beacon */ 718 if ((*frm == IEEE80211_ELEMID_AGERE1) || 719 (*frm == IEEE80211_ELEMID_AGERE2)) { 720 frm = efrm; 721 break; 722 } 723 724 IEEE80211_VERIFY_LENGTH(_PTRDIFF(efrm, frm), frm[1], return); 725 switch (*frm) { 726 case IEEE80211_ELEMID_SSID: 727 scan.ssid = frm; 728 break; 729 case IEEE80211_ELEMID_RATES: 730 scan.rates = frm; 731 break; 732 case IEEE80211_ELEMID_COUNTRY: 733 scan.country = frm; 734 break; 735 case IEEE80211_ELEMID_FHPARMS: 736 if (ic->ic_phytype == IEEE80211_T_FH) { 737 scan.fhdwell = LE_16(*(uint16_t *)(frm + 2)); 738 scan.chan = IEEE80211_FH_CHAN(frm[4], frm[5]); 739 scan.fhindex = frm[6]; 740 scan.phytype = IEEE80211_T_FH; 741 } 742 break; 743 case IEEE80211_ELEMID_DSPARMS: 744 if (ic->ic_phytype != IEEE80211_T_FH) { 745 scan.chan = frm[2]; 746 scan.phytype = IEEE80211_T_DS; 747 } 748 break; 749 case IEEE80211_ELEMID_TIM: 750 scan.tim = frm; 751 scan.timoff = _PTRDIFF(frm, mp->b_rptr); 752 break; 753 case IEEE80211_ELEMID_IBSSPARMS: 754 break; 755 case IEEE80211_ELEMID_XRATES: 756 scan.xrates = frm; 757 break; 758 case IEEE80211_ELEMID_ERP: 759 if (frm[1] != 1) { 760 ieee80211_dbg(IEEE80211_MSG_ELEMID, 761 "ieee80211_recv_mgmt: ignore %s, " 762 "invalid ERP element; " 763 "length %u, expecting 1\n", 764 IEEE80211_SUBTYPE_NAME(subtype), 765 frm[1]); 766 break; 767 } 768 scan.erp = frm[2]; 769 scan.phytype = IEEE80211_T_OFDM; 770 break; 771 case IEEE80211_ELEMID_RSN: 772 scan.wpa = frm; 773 break; 774 case IEEE80211_ELEMID_VENDOR: 775 if (iswpaoui(frm)) 776 scan.wpa = frm; /* IEEE802.11i D3.0 */ 777 break; 778 default: 779 ieee80211_dbg(IEEE80211_MSG_ELEMID, 780 "ieee80211_recv_mgmt: ignore %s," 781 "unhandled id %u, len %u, totallen %u", 782 IEEE80211_SUBTYPE_NAME(subtype), 783 *frm, frm[1], 784 MBLKL(mp)); 785 break; 786 } 787 /* frm[1] - component length */ 788 frm += IEEE80211_ELEM_LEN(frm[1]); 789 } 790 IEEE80211_VERIFY_ELEMENT(scan.rates, IEEE80211_RATE_MAXSIZE, return); 791 IEEE80211_VERIFY_ELEMENT(scan.ssid, IEEE80211_NWID_LEN, return); 792 if (ieee80211_isclr(ic->ic_chan_active, scan.chan)) { 793 ieee80211_dbg(IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT, 794 "ieee80211_recv_mgmt: ignore %s ," 795 "invalid channel %u\n", 796 IEEE80211_SUBTYPE_NAME(subtype), scan.chan); 797 return; 798 } 799 if (scan.chan != scan.bchan && 800 ic->ic_phytype != IEEE80211_T_FH) { 801 /* 802 * Frame was received on a channel different from the 803 * one indicated in the DS params element id; 804 * silently discard it. 805 * 806 * NB: this can happen due to signal leakage. 807 * But we should take it for FH phy because 808 * the rssi value should be correct even for 809 * different hop pattern in FH. 810 */ 811 ieee80211_dbg(IEEE80211_MSG_ELEMID, 812 "ieee80211_recv_mgmt: ignore %s ," 813 "phytype %u channel %u marked for %u\n", 814 IEEE80211_SUBTYPE_NAME(subtype), 815 ic->ic_phytype, scan.bchan, scan.chan); 816 return; 817 } 818 if (!(IEEE80211_BINTVAL_MIN <= scan.bintval && 819 scan.bintval <= IEEE80211_BINTVAL_MAX)) { 820 ieee80211_dbg(IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT, 821 "ieee80211_recv_mgmt: ignore %s ," 822 "bogus beacon interval %u\n", 823 IEEE80211_SUBTYPE_NAME(subtype), scan.bintval); 824 return; 825 } 826 827 /* 828 * When operating in station mode, check for state updates. 829 * Be careful to ignore beacons received while doing a 830 * background scan. We consider only 11g/WMM stuff right now. 831 */ 832 if (ic->ic_opmode == IEEE80211_M_STA && 833 in->in_associd != 0 && 834 (!(ic->ic_flags & IEEE80211_F_SCAN) || 835 IEEE80211_ADDR_EQ(wh->i_addr2, in->in_bssid))) { 836 /* record tsf of last beacon */ 837 bcopy(scan.tstamp, in->in_tstamp.data, 838 sizeof (in->in_tstamp)); 839 /* count beacon frame for s/w bmiss handling */ 840 im->im_swbmiss_count++; 841 im->im_bmiss_count = 0; 842 843 if ((in->in_capinfo ^ scan.capinfo) & 844 IEEE80211_CAPINFO_SHORT_SLOTTIME) { 845 ieee80211_dbg(IEEE80211_MSG_ASSOC, 846 "ieee80211_recv_mgmt: " 847 "[%s] cap change: before 0x%x, now 0x%x\n", 848 ieee80211_macaddr_sprintf(wh->i_addr2), 849 in->in_capinfo, scan.capinfo); 850 /* 851 * NB: we assume short preamble doesn't 852 * change dynamically 853 */ 854 ieee80211_set_shortslottime(ic, 855 ic->ic_curmode == IEEE80211_MODE_11A || 856 (scan.capinfo & 857 IEEE80211_CAPINFO_SHORT_SLOTTIME)); 858 in->in_capinfo = scan.capinfo; 859 } 860 861 if (scan.tim != NULL) { 862 struct ieee80211_tim_ie *ie; 863 864 ie = (struct ieee80211_tim_ie *)scan.tim; 865 in->in_dtim_count = ie->tim_count; 866 in->in_dtim_period = ie->tim_period; 867 } 868 if (ic->ic_flags & IEEE80211_F_SCAN) { 869 ieee80211_add_scan(ic, &scan, wh, subtype, rssi, 870 rstamp); 871 } 872 return; 873 } 874 /* 875 * If scanning, just pass information to the scan module. 876 */ 877 if (ic->ic_flags & IEEE80211_F_SCAN) { 878 ieee80211_add_scan(ic, &scan, wh, subtype, rssi, rstamp); 879 return; 880 } 881 882 if (scan.capinfo & IEEE80211_CAPINFO_IBSS) { 883 if (!IEEE80211_ADDR_EQ(wh->i_addr2, in->in_macaddr)) { 884 /* 885 * Create a new entry in the neighbor table. 886 */ 887 in = ieee80211_add_neighbor(ic, wh, &scan); 888 } else if (in->in_capinfo == 0) { 889 /* 890 * Update faked node created on transmit. 891 * Note this also updates the tsf. 892 */ 893 ieee80211_init_neighbor(in, wh, &scan); 894 } else { 895 /* 896 * Record tsf for potential resync. 897 */ 898 bcopy(scan.tstamp, in->in_tstamp.data, 899 sizeof (in->in_tstamp)); 900 } 901 if (in != NULL) { 902 in->in_rssi = (uint8_t)rssi; 903 in->in_rstamp = rstamp; 904 } 905 } 906 } 907 908 /* 909 * Perform input processing for 802.11 management frames. 910 * It's the default ic_recv_mgmt callback function for the interface 911 * softc, ic. Tipically ic_recv_mgmt is called within ieee80211_input() 912 */ 913 void 914 ieee80211_recv_mgmt(ieee80211com_t *ic, mblk_t *mp, struct ieee80211_node *in, 915 int subtype, int rssi, uint32_t rstamp) 916 { 917 struct ieee80211_frame *wh; 918 uint8_t *frm; /* pointer to start of the frame */ 919 uint8_t *efrm; /* pointer to end of the frame */ 920 uint8_t *ssid; 921 uint8_t *rates; 922 uint8_t *xrates; /* extended rates */ 923 boolean_t allocbs = B_FALSE; 924 uint8_t rate; 925 uint16_t algo; /* authentication algorithm */ 926 uint16_t seq; /* sequence no */ 927 uint16_t status; 928 uint16_t capinfo; 929 uint16_t associd; /* association ID */ 930 931 IEEE80211_LOCK(ic); 932 wh = (struct ieee80211_frame *)mp->b_rptr; 933 frm = (uint8_t *)&wh[1]; 934 efrm = (uint8_t *)mp->b_wptr; 935 switch (subtype) { 936 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 937 case IEEE80211_FC0_SUBTYPE_BEACON: 938 ieee80211_recv_beacon(ic, mp, in, subtype, rssi, rstamp); 939 break; 940 941 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 942 if (ic->ic_opmode == IEEE80211_M_STA || 943 ic->ic_state != IEEE80211_S_RUN || 944 IEEE80211_IS_MULTICAST(wh->i_addr2)) { 945 break; 946 } 947 948 /* 949 * prreq frame format 950 * [tlv] ssid 951 * [tlv] supported rates 952 * [tlv] extended supported rates 953 */ 954 ssid = rates = xrates = NULL; 955 while (frm < efrm) { 956 IEEE80211_VERIFY_LENGTH(_PTRDIFF(efrm, frm), 957 frm[1], goto out); 958 switch (*frm) { 959 case IEEE80211_ELEMID_SSID: 960 ssid = frm; 961 break; 962 case IEEE80211_ELEMID_RATES: 963 rates = frm; 964 break; 965 case IEEE80211_ELEMID_XRATES: 966 xrates = frm; 967 break; 968 } 969 frm += frm[1] + 2; 970 } 971 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, break); 972 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, break); 973 IEEE80211_VERIFY_SSID(ic->ic_bss, ssid, break); 974 if ((ic->ic_flags & IEEE80211_F_HIDESSID) && ssid[1] == 0) { 975 ieee80211_dbg(IEEE80211_MSG_INPUT, 976 "ieee80211_recv_mgmt: ignore %s, " 977 "no ssid with ssid suppression enabled", 978 IEEE80211_SUBTYPE_NAME(subtype)); 979 break; 980 } 981 982 if (in == ic->ic_bss) { 983 if (ic->ic_opmode != IEEE80211_M_IBSS) { 984 in = ieee80211_tmp_node(ic, wh->i_addr2); 985 allocbs = B_TRUE; 986 } else if (!IEEE80211_ADDR_EQ(wh->i_addr2, 987 in->in_macaddr)) { 988 /* 989 * Cannot tell if the sender is operating 990 * in ibss mode. But we need a new node to 991 * send the response so blindly add them to the 992 * neighbor table. 993 */ 994 in = ieee80211_fakeup_adhoc_node(&ic->ic_sta, 995 wh->i_addr2); 996 } 997 if (in == NULL) 998 break; 999 } 1000 ieee80211_dbg(IEEE80211_MSG_ASSOC, "ieee80211_recv_mgmt: " 1001 "[%s] recv probe req\n", 1002 ieee80211_macaddr_sprintf(wh->i_addr2)); 1003 in->in_rssi = (uint8_t)rssi; 1004 in->in_rstamp = rstamp; 1005 /* 1006 * Adjust and check station's rate list with device's 1007 * supported rate. Send back response if there is at 1008 * least one rate or the fixed rate(if being set) is 1009 * supported by both station and the device 1010 */ 1011 rate = ieee80211_setup_rates(in, rates, xrates, 1012 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1013 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1014 if (rate & IEEE80211_RATE_BASIC) { 1015 ieee80211_dbg(IEEE80211_MSG_XRATE, "ieee80211_recv_mgmt" 1016 "%s recv'd rate set invalid", 1017 IEEE80211_SUBTYPE_NAME(subtype)); 1018 } else { 1019 IEEE80211_UNLOCK(ic); 1020 IEEE80211_SEND_MGMT(ic, in, 1021 IEEE80211_FC0_SUBTYPE_PROBE_RESP, 0); 1022 IEEE80211_LOCK(ic); 1023 } 1024 if (allocbs) { 1025 /* 1026 * Temporary node created just to send a 1027 * response, reclaim immediately. 1028 */ 1029 ieee80211_free_node(in); 1030 } 1031 break; 1032 1033 case IEEE80211_FC0_SUBTYPE_AUTH: 1034 /* 1035 * auth frame format 1036 * [2] algorithm 1037 * [2] sequence 1038 * [2] status 1039 * [tlv*] challenge 1040 */ 1041 IEEE80211_VERIFY_LENGTH(_PTRDIFF(efrm, frm), 1042 IEEE80211_AUTH_ELEM_MIN, break); 1043 algo = (*(uint16_t *)frm); 1044 seq = (*(uint16_t *)(frm + 2)); 1045 status = (*(uint16_t *)(frm + 4)); 1046 ieee80211_dbg(IEEE80211_MSG_AUTH, "ieee80211_recv_mgmt: " 1047 "[%s] recv auth frame with algorithm %d seq %d\n", 1048 ieee80211_macaddr_sprintf(wh->i_addr2), algo, seq); 1049 1050 if (ic->ic_flags & IEEE80211_F_COUNTERM) { 1051 ieee80211_dbg(IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO, 1052 "ieee80211_recv_mgmt: ignore auth, %s\n", 1053 "TKIP countermeasures enabled"); 1054 break; 1055 } 1056 switch (algo) { 1057 case IEEE80211_AUTH_ALG_SHARED: 1058 ieee80211_auth_shared(ic, wh, frm + 6, efrm, in, 1059 seq, status); 1060 break; 1061 case IEEE80211_AUTH_ALG_OPEN: 1062 ieee80211_auth_open(ic, wh, in, seq, status); 1063 break; 1064 default: 1065 ieee80211_dbg(IEEE80211_MSG_ANY, "ieee80211_recv_mgmt: " 1066 "ignore auth, unsupported alg %d", algo); 1067 break; 1068 } 1069 break; 1070 1071 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 1072 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 1073 if (ic->ic_opmode != IEEE80211_M_STA || 1074 ic->ic_state != IEEE80211_S_ASSOC) 1075 break; 1076 1077 /* 1078 * asresp frame format 1079 * [2] capability information 1080 * [2] status 1081 * [2] association ID 1082 * [tlv] supported rates 1083 * [tlv] extended supported rates 1084 * [tlv] WME 1085 */ 1086 IEEE80211_VERIFY_LENGTH(_PTRDIFF(efrm, frm), 1087 IEEE80211_ASSOC_RESP_ELEM_MIN, break); 1088 in = ic->ic_bss; 1089 capinfo = (*(uint16_t *)frm); 1090 frm += 2; 1091 status = (*(uint16_t *)frm); 1092 frm += 2; 1093 if (status != 0) { 1094 ieee80211_dbg(IEEE80211_MSG_ASSOC, 1095 "assoc failed (reason %d)\n", status); 1096 in = ieee80211_find_node(&ic->ic_scan, wh->i_addr2); 1097 if (in != NULL) { 1098 in->in_fails++; 1099 ieee80211_free_node(in); 1100 } 1101 break; 1102 } 1103 associd = (*(uint16_t *)frm); 1104 frm += 2; 1105 1106 rates = xrates = NULL; 1107 while (frm < efrm) { 1108 /* 1109 * Do not discard frames containing proprietary Agere 1110 * elements 128 and 129, as the reported element length 1111 * is often wrong. Skip rest of the frame, since we can 1112 * not rely on the given element length making it 1113 * impossible to know where the next element starts 1114 */ 1115 if ((*frm == IEEE80211_ELEMID_AGERE1) || 1116 (*frm == IEEE80211_ELEMID_AGERE2)) { 1117 frm = efrm; 1118 break; 1119 } 1120 1121 IEEE80211_VERIFY_LENGTH(_PTRDIFF(efrm, frm), 1122 frm[1], goto out); 1123 switch (*frm) { 1124 case IEEE80211_ELEMID_RATES: 1125 rates = frm; 1126 break; 1127 case IEEE80211_ELEMID_XRATES: 1128 xrates = frm; 1129 break; 1130 } 1131 frm += frm[1] + 2; 1132 } 1133 1134 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, break); 1135 /* 1136 * Adjust and check AP's rate list with device's 1137 * supported rate. Re-start scan if no rate is or the 1138 * fixed rate(if being set) cannot be supported by 1139 * either AP or the device. 1140 */ 1141 rate = ieee80211_setup_rates(in, rates, xrates, 1142 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1143 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1144 if (rate & IEEE80211_RATE_BASIC) { 1145 ieee80211_dbg(IEEE80211_MSG_ASSOC, 1146 "assoc failed (rate set mismatch)\n"); 1147 if (in != ic->ic_bss) 1148 in->in_fails++; 1149 IEEE80211_UNLOCK(ic); 1150 ieee80211_new_state(ic, IEEE80211_S_SCAN, 0); 1151 return; 1152 } 1153 1154 in->in_capinfo = capinfo; 1155 in->in_associd = associd; 1156 in->in_flags &= ~IEEE80211_NODE_QOS; 1157 /* 1158 * Configure state now that we are associated. 1159 */ 1160 if (ic->ic_curmode == IEEE80211_MODE_11A || 1161 (in->in_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1162 ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 1163 ic->ic_flags &= ~IEEE80211_F_USEBARKER; 1164 } else { 1165 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 1166 ic->ic_flags |= IEEE80211_F_USEBARKER; 1167 } 1168 ieee80211_set_shortslottime(ic, 1169 ic->ic_curmode == IEEE80211_MODE_11A || 1170 (in->in_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1171 /* 1172 * Honor ERP protection. 1173 * 1174 * NB: in_erp should zero for non-11g operation. 1175 * check ic_curmode anyway 1176 */ 1177 if (ic->ic_curmode == IEEE80211_MODE_11G && 1178 (in->in_erp & IEEE80211_ERP_USE_PROTECTION)) 1179 ic->ic_flags |= IEEE80211_F_USEPROT; 1180 else 1181 ic->ic_flags &= ~IEEE80211_F_USEPROT; 1182 ieee80211_dbg(IEEE80211_MSG_ASSOC, 1183 "assoc success: %s preamble, %s slot time%s%s\n", 1184 ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 1185 ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 1186 ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "", 1187 in->in_flags & IEEE80211_NODE_QOS ? ", QoS" : ""); 1188 IEEE80211_UNLOCK(ic); 1189 ieee80211_new_state(ic, IEEE80211_S_RUN, subtype); 1190 return; 1191 1192 case IEEE80211_FC0_SUBTYPE_DEAUTH: 1193 if (ic->ic_state == IEEE80211_S_SCAN) 1194 break; 1195 1196 /* 1197 * deauth frame format 1198 * [2] reason 1199 */ 1200 IEEE80211_VERIFY_LENGTH(_PTRDIFF(efrm, frm), 2, break); 1201 status = (*(uint16_t *)frm); 1202 1203 ieee80211_dbg(IEEE80211_MSG_AUTH, 1204 "recv deauthenticate (reason %d)\n", status); 1205 switch (ic->ic_opmode) { 1206 case IEEE80211_M_STA: 1207 IEEE80211_UNLOCK(ic); 1208 ieee80211_new_state(ic, IEEE80211_S_AUTH, 1209 wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK); 1210 return; 1211 default: 1212 break; 1213 } 1214 break; 1215 1216 case IEEE80211_FC0_SUBTYPE_DISASSOC: 1217 if (ic->ic_state != IEEE80211_S_RUN && 1218 ic->ic_state != IEEE80211_S_ASSOC && 1219 ic->ic_state != IEEE80211_S_AUTH) 1220 break; 1221 /* 1222 * disassoc frame format 1223 * [2] reason 1224 */ 1225 IEEE80211_VERIFY_LENGTH(_PTRDIFF(efrm, frm), 2, break); 1226 status = (*(uint16_t *)frm); 1227 1228 ieee80211_dbg(IEEE80211_MSG_ASSOC, 1229 "recv disassociate (reason %d)\n", status); 1230 switch (ic->ic_opmode) { 1231 case IEEE80211_M_STA: 1232 IEEE80211_UNLOCK(ic); 1233 ieee80211_new_state(ic, IEEE80211_S_ASSOC, 1234 wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK); 1235 return; 1236 default: 1237 break; 1238 } 1239 break; 1240 1241 default: 1242 ieee80211_dbg(IEEE80211_MSG_ANY, "ieee80211_recv_mgmt: " 1243 "subtype 0x%x not handled\n", subtype); 1244 break; 1245 } /* switch subtype */ 1246 out: 1247 IEEE80211_UNLOCK(ic); 1248 } 1249