1 /*- 2 * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #include <sys/cdefs.h> 27 #ifdef __FreeBSD__ 28 __FBSDID("$FreeBSD$"); 29 #endif 30 31 /* 32 * IEEE 802.11 HOSTAP mode support. 33 */ 34 #include "opt_inet.h" 35 #include "opt_wlan.h" 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/mbuf.h> 40 #include <sys/malloc.h> 41 #include <sys/kernel.h> 42 43 #include <sys/socket.h> 44 #include <sys/sockio.h> 45 #include <sys/endian.h> 46 #include <sys/errno.h> 47 #include <sys/proc.h> 48 #include <sys/sysctl.h> 49 50 #include <net/if.h> 51 #include <net/if_media.h> 52 #include <net/if_llc.h> 53 #include <net/ethernet.h> 54 55 #include <net/bpf.h> 56 57 #include <net80211/ieee80211_var.h> 58 #include <net80211/ieee80211_hostap.h> 59 #include <net80211/ieee80211_input.h> 60 #include <net80211/ieee80211_wds.h> 61 62 #define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2) 63 64 static void hostap_vattach(struct ieee80211vap *); 65 static int hostap_newstate(struct ieee80211vap *, enum ieee80211_state, int); 66 static int hostap_input(struct ieee80211_node *ni, struct mbuf *m, 67 int rssi, int noise, uint32_t rstamp); 68 static void hostap_deliver_data(struct ieee80211vap *, 69 struct ieee80211_node *, struct mbuf *); 70 static void hostap_recv_mgmt(struct ieee80211_node *, struct mbuf *, 71 int subtype, int rssi, int noise, uint32_t rstamp); 72 static void hostap_recv_pspoll(struct ieee80211_node *, struct mbuf *); 73 74 void 75 ieee80211_hostap_attach(struct ieee80211com *ic) 76 { 77 ic->ic_vattach[IEEE80211_M_HOSTAP] = hostap_vattach; 78 } 79 80 void 81 ieee80211_hostap_detach(struct ieee80211com *ic) 82 { 83 } 84 85 static void 86 hostap_vdetach(struct ieee80211vap *vap) 87 { 88 } 89 90 static void 91 hostap_vattach(struct ieee80211vap *vap) 92 { 93 vap->iv_newstate = hostap_newstate; 94 vap->iv_input = hostap_input; 95 vap->iv_recv_mgmt = hostap_recv_mgmt; 96 vap->iv_opdetach = hostap_vdetach; 97 vap->iv_deliver_data = hostap_deliver_data; 98 } 99 100 static void 101 sta_disassoc(void *arg, struct ieee80211_node *ni) 102 { 103 struct ieee80211vap *vap = arg; 104 105 if (ni->ni_vap == vap && ni->ni_associd != 0) { 106 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DISASSOC, 107 IEEE80211_REASON_ASSOC_LEAVE); 108 ieee80211_node_leave(ni); 109 } 110 } 111 112 /* 113 * IEEE80211_M_HOSTAP vap state machine handler. 114 */ 115 static int 116 hostap_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 117 { 118 struct ieee80211com *ic = vap->iv_ic; 119 enum ieee80211_state ostate; 120 121 IEEE80211_LOCK_ASSERT(ic); 122 123 ostate = vap->iv_state; 124 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 125 __func__, ieee80211_state_name[ostate], 126 ieee80211_state_name[nstate], arg); 127 vap->iv_state = nstate; /* state transition */ 128 if (ostate != IEEE80211_S_SCAN) 129 ieee80211_cancel_scan(vap); /* background scan */ 130 switch (nstate) { 131 case IEEE80211_S_INIT: 132 switch (ostate) { 133 case IEEE80211_S_SCAN: 134 ieee80211_cancel_scan(vap); 135 break; 136 case IEEE80211_S_CAC: 137 ieee80211_dfs_cac_stop(vap); 138 break; 139 case IEEE80211_S_RUN: 140 ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, vap); 141 break; 142 default: 143 break; 144 } 145 if (ostate != IEEE80211_S_INIT) { 146 /* NB: optimize INIT -> INIT case */ 147 ieee80211_reset_bss(vap); 148 } 149 if (vap->iv_auth->ia_detach != NULL) 150 vap->iv_auth->ia_detach(vap); 151 break; 152 case IEEE80211_S_SCAN: 153 switch (ostate) { 154 case IEEE80211_S_CSA: 155 case IEEE80211_S_RUN: 156 ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, vap); 157 /* 158 * Clear overlapping BSS state; the beacon frame 159 * will be reconstructed on transition to the RUN 160 * state and the timeout routines check if the flag 161 * is set before doing anything so this is sufficient. 162 */ 163 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 164 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONHT_PR; 165 /* fall thru... */ 166 case IEEE80211_S_CAC: 167 /* 168 * NB: We may get here because of a manual channel 169 * change in which case we need to stop CAC 170 * XXX no need to stop if ostate RUN but it's ok 171 */ 172 ieee80211_dfs_cac_stop(vap); 173 /* fall thru... */ 174 case IEEE80211_S_INIT: 175 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 176 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan)) { 177 /* 178 * Already have a channel; bypass the 179 * scan and startup immediately. 180 * ieee80211_create_ibss will call back to 181 * move us to RUN state. 182 */ 183 ieee80211_create_ibss(vap, vap->iv_des_chan); 184 break; 185 } 186 /* 187 * Initiate a scan. We can come here as a result 188 * of an IEEE80211_IOC_SCAN_REQ too in which case 189 * the vap will be marked with IEEE80211_FEXT_SCANREQ 190 * and the scan request parameters will be present 191 * in iv_scanreq. Otherwise we do the default. 192 */ 193 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 194 ieee80211_check_scan(vap, 195 vap->iv_scanreq_flags, 196 vap->iv_scanreq_duration, 197 vap->iv_scanreq_mindwell, 198 vap->iv_scanreq_maxdwell, 199 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 200 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 201 } else 202 ieee80211_check_scan_current(vap); 203 break; 204 case IEEE80211_S_SCAN: 205 /* 206 * A state change requires a reset; scan. 207 */ 208 ieee80211_check_scan_current(vap); 209 break; 210 default: 211 break; 212 } 213 break; 214 case IEEE80211_S_CAC: 215 /* 216 * Start CAC on a DFS channel. We come here when starting 217 * a bss on a DFS channel (see ieee80211_create_ibss). 218 */ 219 ieee80211_dfs_cac_start(vap); 220 break; 221 case IEEE80211_S_RUN: 222 if (vap->iv_flags & IEEE80211_F_WPA) { 223 /* XXX validate prerequisites */ 224 } 225 switch (ostate) { 226 case IEEE80211_S_INIT: 227 /* 228 * Already have a channel; bypass the 229 * scan and startup immediately. 230 * Note that ieee80211_create_ibss will call 231 * back to do a RUN->RUN state change. 232 */ 233 ieee80211_create_ibss(vap, 234 ieee80211_ht_adjust_channel(ic, 235 ic->ic_curchan, vap->iv_flags_ext)); 236 /* NB: iv_bss is changed on return */ 237 break; 238 case IEEE80211_S_CAC: 239 /* 240 * NB: This is the normal state change when CAC 241 * expires and no radar was detected; no need to 242 * clear the CAC timer as it's already expired. 243 */ 244 /* fall thru... */ 245 case IEEE80211_S_CSA: 246 /* 247 * Update bss node channel to reflect where 248 * we landed after CSA. 249 */ 250 ieee80211_node_set_chan(vap->iv_bss, 251 ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 252 ieee80211_htchanflags(vap->iv_bss->ni_chan))); 253 /* XXX bypass debug msgs */ 254 break; 255 case IEEE80211_S_SCAN: 256 case IEEE80211_S_RUN: 257 #ifdef IEEE80211_DEBUG 258 if (ieee80211_msg_debug(vap)) { 259 struct ieee80211_node *ni = vap->iv_bss; 260 ieee80211_note(vap, 261 "synchronized with %s ssid ", 262 ether_sprintf(ni->ni_bssid)); 263 ieee80211_print_essid(ni->ni_essid, 264 ni->ni_esslen); 265 /* XXX MCS/HT */ 266 printf(" channel %d start %uMb\n", 267 ieee80211_chan2ieee(ic, ic->ic_curchan), 268 IEEE80211_RATE2MBS(ni->ni_txrate)); 269 } 270 #endif 271 break; 272 default: 273 break; 274 } 275 /* 276 * Start/stop the authenticator. We delay until here 277 * to allow configuration to happen out of order. 278 */ 279 if (vap->iv_auth->ia_attach != NULL) { 280 /* XXX check failure */ 281 vap->iv_auth->ia_attach(vap); 282 } else if (vap->iv_auth->ia_detach != NULL) { 283 vap->iv_auth->ia_detach(vap); 284 } 285 ieee80211_node_authorize(vap->iv_bss); 286 break; 287 default: 288 break; 289 } 290 return 0; 291 } 292 293 static void 294 hostap_deliver_data(struct ieee80211vap *vap, 295 struct ieee80211_node *ni, struct mbuf *m) 296 { 297 struct ether_header *eh = mtod(m, struct ether_header *); 298 struct ifnet *ifp = vap->iv_ifp; 299 300 KASSERT(vap->iv_opmode == IEEE80211_M_HOSTAP, 301 ("gack, opmode %d", vap->iv_opmode)); 302 /* 303 * Do accounting. 304 */ 305 ifp->if_ipackets++; 306 IEEE80211_NODE_STAT(ni, rx_data); 307 IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len); 308 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 309 m->m_flags |= M_MCAST; /* XXX M_BCAST? */ 310 IEEE80211_NODE_STAT(ni, rx_mcast); 311 } else 312 IEEE80211_NODE_STAT(ni, rx_ucast); 313 314 /* clear driver/net80211 flags before passing up */ 315 m->m_flags &= ~M_80211_RX; 316 317 /* perform as a bridge within the AP */ 318 if ((vap->iv_flags & IEEE80211_F_NOBRIDGE) == 0) { 319 struct mbuf *mcopy = NULL; 320 321 if (m->m_flags & M_MCAST) { 322 mcopy = m_dup(m, M_DONTWAIT); 323 if (mcopy == NULL) 324 ifp->if_oerrors++; 325 else 326 mcopy->m_flags |= M_MCAST; 327 } else { 328 /* 329 * Check if the destination is associated with the 330 * same vap and authorized to receive traffic. 331 * Beware of traffic destined for the vap itself; 332 * sending it will not work; just let it be delivered 333 * normally. 334 */ 335 struct ieee80211_node *sta = ieee80211_find_vap_node( 336 &vap->iv_ic->ic_sta, vap, eh->ether_dhost); 337 if (sta != NULL) { 338 if (ieee80211_node_is_authorized(sta)) { 339 /* 340 * Beware of sending to ourself; this 341 * needs to happen via the normal 342 * input path. 343 */ 344 if (sta != vap->iv_bss) { 345 mcopy = m; 346 m = NULL; 347 } 348 } else { 349 vap->iv_stats.is_rx_unauth++; 350 IEEE80211_NODE_STAT(sta, rx_unauth); 351 } 352 ieee80211_free_node(sta); 353 } 354 } 355 if (mcopy != NULL) { 356 int len, err; 357 len = mcopy->m_pkthdr.len; 358 err = ifp->if_transmit(ifp, mcopy); 359 if (err) { 360 /* NB: IFQ_HANDOFF reclaims mcopy */ 361 } else { 362 ifp->if_opackets++; 363 } 364 } 365 } 366 if (m != NULL) { 367 /* 368 * Mark frame as coming from vap's interface. 369 */ 370 m->m_pkthdr.rcvif = ifp; 371 if (m->m_flags & M_MCAST) { 372 /* 373 * Spam DWDS vap's w/ multicast traffic. 374 */ 375 /* XXX only if dwds in use? */ 376 ieee80211_dwds_mcast(vap, m); 377 } 378 if (ni->ni_vlan != 0) { 379 /* attach vlan tag */ 380 m->m_pkthdr.ether_vtag = ni->ni_vlan; 381 m->m_flags |= M_VLANTAG; 382 } 383 ifp->if_input(ifp, m); 384 } 385 } 386 387 /* 388 * Decide if a received management frame should be 389 * printed when debugging is enabled. This filters some 390 * of the less interesting frames that come frequently 391 * (e.g. beacons). 392 */ 393 static __inline int 394 doprint(struct ieee80211vap *vap, int subtype) 395 { 396 switch (subtype) { 397 case IEEE80211_FC0_SUBTYPE_BEACON: 398 return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN); 399 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 400 return 0; 401 } 402 return 1; 403 } 404 405 /* 406 * Process a received frame. The node associated with the sender 407 * should be supplied. If nothing was found in the node table then 408 * the caller is assumed to supply a reference to iv_bss instead. 409 * The RSSI and a timestamp are also supplied. The RSSI data is used 410 * during AP scanning to select a AP to associate with; it can have 411 * any units so long as values have consistent units and higher values 412 * mean ``better signal''. The receive timestamp is currently not used 413 * by the 802.11 layer. 414 */ 415 static int 416 hostap_input(struct ieee80211_node *ni, struct mbuf *m, 417 int rssi, int noise, uint32_t rstamp) 418 { 419 #define SEQ_LEQ(a,b) ((int)((a)-(b)) <= 0) 420 #define HAS_SEQ(type) ((type & 0x4) == 0) 421 struct ieee80211vap *vap = ni->ni_vap; 422 struct ieee80211com *ic = ni->ni_ic; 423 struct ifnet *ifp = vap->iv_ifp; 424 struct ieee80211_frame *wh; 425 struct ieee80211_key *key; 426 struct ether_header *eh; 427 int hdrspace, need_tap; 428 uint8_t dir, type, subtype, qos; 429 uint8_t *bssid; 430 uint16_t rxseq; 431 432 if (m->m_flags & M_AMPDU_MPDU) { 433 /* 434 * Fastpath for A-MPDU reorder q resubmission. Frames 435 * w/ M_AMPDU_MPDU marked have already passed through 436 * here but were received out of order and been held on 437 * the reorder queue. When resubmitted they are marked 438 * with the M_AMPDU_MPDU flag and we can bypass most of 439 * the normal processing. 440 */ 441 wh = mtod(m, struct ieee80211_frame *); 442 type = IEEE80211_FC0_TYPE_DATA; 443 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 444 subtype = IEEE80211_FC0_SUBTYPE_QOS; 445 hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ 446 goto resubmit_ampdu; 447 } 448 449 KASSERT(ni != NULL, ("null node")); 450 ni->ni_inact = ni->ni_inact_reload; 451 452 need_tap = 1; /* mbuf need to be tapped. */ 453 type = -1; /* undefined */ 454 455 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 456 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 457 ni->ni_macaddr, NULL, 458 "too short (1): len %u", m->m_pkthdr.len); 459 vap->iv_stats.is_rx_tooshort++; 460 goto out; 461 } 462 /* 463 * Bit of a cheat here, we use a pointer for a 3-address 464 * frame format but don't reference fields past outside 465 * ieee80211_frame_min w/o first validating the data is 466 * present. 467 */ 468 wh = mtod(m, struct ieee80211_frame *); 469 470 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 471 IEEE80211_FC0_VERSION_0) { 472 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 473 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 474 vap->iv_stats.is_rx_badversion++; 475 goto err; 476 } 477 478 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 479 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 480 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 481 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 482 if (dir != IEEE80211_FC1_DIR_NODS) 483 bssid = wh->i_addr1; 484 else if (type == IEEE80211_FC0_TYPE_CTL) 485 bssid = wh->i_addr1; 486 else { 487 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 488 IEEE80211_DISCARD_MAC(vap, 489 IEEE80211_MSG_ANY, ni->ni_macaddr, 490 NULL, "too short (2): len %u", 491 m->m_pkthdr.len); 492 vap->iv_stats.is_rx_tooshort++; 493 goto out; 494 } 495 bssid = wh->i_addr3; 496 } 497 /* 498 * Validate the bssid. 499 */ 500 if (!(type == IEEE80211_FC0_TYPE_MGT && 501 subtype == IEEE80211_FC0_SUBTYPE_BEACON) && 502 !IEEE80211_ADDR_EQ(bssid, vap->iv_bss->ni_bssid) && 503 !IEEE80211_ADDR_EQ(bssid, ifp->if_broadcastaddr)) { 504 /* not interested in */ 505 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 506 bssid, NULL, "%s", "not to bss"); 507 vap->iv_stats.is_rx_wrongbss++; 508 goto out; 509 } 510 511 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 512 ni->ni_noise = noise; 513 ni->ni_rstamp = rstamp; 514 if (HAS_SEQ(type)) { 515 uint8_t tid = ieee80211_gettid(wh); 516 if (IEEE80211_QOS_HAS_SEQ(wh) && 517 TID_TO_WME_AC(tid) >= WME_AC_VI) 518 ic->ic_wme.wme_hipri_traffic++; 519 rxseq = le16toh(*(uint16_t *)wh->i_seq); 520 if ((ni->ni_flags & IEEE80211_NODE_HT) == 0 && 521 (wh->i_fc[1] & IEEE80211_FC1_RETRY) && 522 SEQ_LEQ(rxseq, ni->ni_rxseqs[tid])) { 523 /* duplicate, discard */ 524 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 525 bssid, "duplicate", 526 "seqno <%u,%u> fragno <%u,%u> tid %u", 527 rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 528 ni->ni_rxseqs[tid] >> 529 IEEE80211_SEQ_SEQ_SHIFT, 530 rxseq & IEEE80211_SEQ_FRAG_MASK, 531 ni->ni_rxseqs[tid] & 532 IEEE80211_SEQ_FRAG_MASK, 533 tid); 534 vap->iv_stats.is_rx_dup++; 535 IEEE80211_NODE_STAT(ni, rx_dup); 536 goto out; 537 } 538 ni->ni_rxseqs[tid] = rxseq; 539 } 540 } 541 542 switch (type) { 543 case IEEE80211_FC0_TYPE_DATA: 544 hdrspace = ieee80211_hdrspace(ic, wh); 545 if (m->m_len < hdrspace && 546 (m = m_pullup(m, hdrspace)) == NULL) { 547 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 548 ni->ni_macaddr, NULL, 549 "data too short: expecting %u", hdrspace); 550 vap->iv_stats.is_rx_tooshort++; 551 goto out; /* XXX */ 552 } 553 if (!(dir == IEEE80211_FC1_DIR_TODS || 554 (dir == IEEE80211_FC1_DIR_DSTODS && 555 (vap->iv_flags & IEEE80211_F_DWDS)))) { 556 if (dir != IEEE80211_FC1_DIR_DSTODS) { 557 IEEE80211_DISCARD(vap, 558 IEEE80211_MSG_INPUT, wh, "data", 559 "incorrect dir 0x%x", dir); 560 } else { 561 IEEE80211_DISCARD(vap, 562 IEEE80211_MSG_INPUT | 563 IEEE80211_MSG_WDS, wh, 564 "4-address data", 565 "%s", "DWDS not enabled"); 566 } 567 vap->iv_stats.is_rx_wrongdir++; 568 goto out; 569 } 570 /* check if source STA is associated */ 571 if (ni == vap->iv_bss) { 572 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 573 wh, "data", "%s", "unknown src"); 574 ieee80211_send_error(ni, wh->i_addr2, 575 IEEE80211_FC0_SUBTYPE_DEAUTH, 576 IEEE80211_REASON_NOT_AUTHED); 577 vap->iv_stats.is_rx_notassoc++; 578 goto err; 579 } 580 if (ni->ni_associd == 0) { 581 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 582 wh, "data", "%s", "unassoc src"); 583 IEEE80211_SEND_MGMT(ni, 584 IEEE80211_FC0_SUBTYPE_DISASSOC, 585 IEEE80211_REASON_NOT_ASSOCED); 586 vap->iv_stats.is_rx_notassoc++; 587 goto err; 588 } 589 590 /* 591 * Check for power save state change. 592 * XXX out-of-order A-MPDU frames? 593 */ 594 if (((wh->i_fc[1] & IEEE80211_FC1_PWR_MGT) ^ 595 (ni->ni_flags & IEEE80211_NODE_PWR_MGT))) 596 ieee80211_node_pwrsave(ni, 597 wh->i_fc[1] & IEEE80211_FC1_PWR_MGT); 598 /* 599 * For 4-address packets handle WDS discovery 600 * notifications. Once a WDS link is setup frames 601 * are just delivered to the WDS vap (see below). 602 */ 603 if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap == NULL) { 604 if (!ieee80211_node_is_authorized(ni)) { 605 IEEE80211_DISCARD(vap, 606 IEEE80211_MSG_INPUT | 607 IEEE80211_MSG_WDS, wh, 608 "4-address data", 609 "%s", "unauthorized port"); 610 vap->iv_stats.is_rx_unauth++; 611 IEEE80211_NODE_STAT(ni, rx_unauth); 612 goto err; 613 } 614 ieee80211_dwds_discover(ni, m); 615 return type; 616 } 617 618 /* 619 * Handle A-MPDU re-ordering. If the frame is to be 620 * processed directly then ieee80211_ampdu_reorder 621 * will return 0; otherwise it has consumed the mbuf 622 * and we should do nothing more with it. 623 */ 624 if ((m->m_flags & M_AMPDU) && 625 ieee80211_ampdu_reorder(ni, m) != 0) { 626 m = NULL; 627 goto out; 628 } 629 resubmit_ampdu: 630 631 /* 632 * Handle privacy requirements. Note that we 633 * must not be preempted from here until after 634 * we (potentially) call ieee80211_crypto_demic; 635 * otherwise we may violate assumptions in the 636 * crypto cipher modules used to do delayed update 637 * of replay sequence numbers. 638 */ 639 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 640 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 641 /* 642 * Discard encrypted frames when privacy is off. 643 */ 644 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 645 wh, "WEP", "%s", "PRIVACY off"); 646 vap->iv_stats.is_rx_noprivacy++; 647 IEEE80211_NODE_STAT(ni, rx_noprivacy); 648 goto out; 649 } 650 key = ieee80211_crypto_decap(ni, m, hdrspace); 651 if (key == NULL) { 652 /* NB: stats+msgs handled in crypto_decap */ 653 IEEE80211_NODE_STAT(ni, rx_wepfail); 654 goto out; 655 } 656 wh = mtod(m, struct ieee80211_frame *); 657 wh->i_fc[1] &= ~IEEE80211_FC1_WEP; 658 } else { 659 /* XXX M_WEP and IEEE80211_F_PRIVACY */ 660 key = NULL; 661 } 662 663 /* 664 * Save QoS bits for use below--before we strip the header. 665 */ 666 if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { 667 qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? 668 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : 669 ((struct ieee80211_qosframe *)wh)->i_qos[0]; 670 } else 671 qos = 0; 672 673 /* 674 * Next up, any fragmentation. 675 */ 676 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 677 m = ieee80211_defrag(ni, m, hdrspace); 678 if (m == NULL) { 679 /* Fragment dropped or frame not complete yet */ 680 goto out; 681 } 682 } 683 wh = NULL; /* no longer valid, catch any uses */ 684 685 /* 686 * Next strip any MSDU crypto bits. 687 */ 688 if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) { 689 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 690 ni->ni_macaddr, "data", "%s", "demic error"); 691 vap->iv_stats.is_rx_demicfail++; 692 IEEE80211_NODE_STAT(ni, rx_demicfail); 693 goto out; 694 } 695 /* copy to listener after decrypt */ 696 if (bpf_peers_present(vap->iv_rawbpf)) 697 bpf_mtap(vap->iv_rawbpf, m); 698 need_tap = 0; 699 /* 700 * Finally, strip the 802.11 header. 701 */ 702 m = ieee80211_decap(vap, m, hdrspace); 703 if (m == NULL) { 704 /* XXX mask bit to check for both */ 705 /* don't count Null data frames as errors */ 706 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 707 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 708 goto out; 709 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 710 ni->ni_macaddr, "data", "%s", "decap error"); 711 vap->iv_stats.is_rx_decap++; 712 IEEE80211_NODE_STAT(ni, rx_decap); 713 goto err; 714 } 715 eh = mtod(m, struct ether_header *); 716 if (!ieee80211_node_is_authorized(ni)) { 717 /* 718 * Deny any non-PAE frames received prior to 719 * authorization. For open/shared-key 720 * authentication the port is mark authorized 721 * after authentication completes. For 802.1x 722 * the port is not marked authorized by the 723 * authenticator until the handshake has completed. 724 */ 725 if (eh->ether_type != htons(ETHERTYPE_PAE)) { 726 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 727 eh->ether_shost, "data", 728 "unauthorized port: ether type 0x%x len %u", 729 eh->ether_type, m->m_pkthdr.len); 730 vap->iv_stats.is_rx_unauth++; 731 IEEE80211_NODE_STAT(ni, rx_unauth); 732 goto err; 733 } 734 } else { 735 /* 736 * When denying unencrypted frames, discard 737 * any non-PAE frames received without encryption. 738 */ 739 if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && 740 (key == NULL && (m->m_flags & M_WEP) == 0) && 741 eh->ether_type != htons(ETHERTYPE_PAE)) { 742 /* 743 * Drop unencrypted frames. 744 */ 745 vap->iv_stats.is_rx_unencrypted++; 746 IEEE80211_NODE_STAT(ni, rx_unencrypted); 747 goto out; 748 } 749 } 750 /* XXX require HT? */ 751 if (qos & IEEE80211_QOS_AMSDU) { 752 m = ieee80211_decap_amsdu(ni, m); 753 if (m == NULL) 754 return IEEE80211_FC0_TYPE_DATA; 755 } else if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) && 756 #define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc)) 757 m->m_pkthdr.len >= 3*FF_LLC_SIZE) { 758 struct llc *llc; 759 760 /* 761 * Check for fast-frame tunnel encapsulation. 762 */ 763 if (m->m_len < FF_LLC_SIZE && 764 (m = m_pullup(m, FF_LLC_SIZE)) == NULL) { 765 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 766 ni->ni_macaddr, "fast-frame", 767 "%s", "m_pullup(llc) failed"); 768 vap->iv_stats.is_rx_tooshort++; 769 return IEEE80211_FC0_TYPE_DATA; 770 } 771 llc = (struct llc *)(mtod(m, uint8_t *) + 772 sizeof(struct ether_header)); 773 if (llc->llc_snap.ether_type == htons(ATH_FF_ETH_TYPE)) { 774 m_adj(m, FF_LLC_SIZE); 775 m = ieee80211_decap_fastframe(ni, m); 776 if (m == NULL) 777 return IEEE80211_FC0_TYPE_DATA; 778 } 779 } 780 #undef FF_LLC_SIZE 781 if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap != NULL) 782 ieee80211_deliver_data(ni->ni_wdsvap, ni, m); 783 else 784 hostap_deliver_data(vap, ni, m); 785 return IEEE80211_FC0_TYPE_DATA; 786 787 case IEEE80211_FC0_TYPE_MGT: 788 vap->iv_stats.is_rx_mgmt++; 789 IEEE80211_NODE_STAT(ni, rx_mgmt); 790 if (dir != IEEE80211_FC1_DIR_NODS) { 791 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 792 wh, "mgt", "incorrect dir 0x%x", dir); 793 vap->iv_stats.is_rx_wrongdir++; 794 goto err; 795 } 796 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 797 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 798 ni->ni_macaddr, "mgt", "too short: len %u", 799 m->m_pkthdr.len); 800 vap->iv_stats.is_rx_tooshort++; 801 goto out; 802 } 803 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 804 /* ensure return frames are unicast */ 805 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 806 wh, NULL, "source is multicast: %s", 807 ether_sprintf(wh->i_addr2)); 808 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 809 goto out; 810 } 811 #ifdef IEEE80211_DEBUG 812 if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) || 813 ieee80211_msg_dumppkts(vap)) { 814 if_printf(ifp, "received %s from %s rssi %d\n", 815 ieee80211_mgt_subtype_name[subtype >> 816 IEEE80211_FC0_SUBTYPE_SHIFT], 817 ether_sprintf(wh->i_addr2), rssi); 818 } 819 #endif 820 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 821 if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) { 822 /* 823 * Only shared key auth frames with a challenge 824 * should be encrypted, discard all others. 825 */ 826 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 827 wh, NULL, 828 "%s", "WEP set but not permitted"); 829 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 830 goto out; 831 } 832 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 833 /* 834 * Discard encrypted frames when privacy is off. 835 */ 836 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 837 wh, NULL, "%s", "WEP set but PRIVACY off"); 838 vap->iv_stats.is_rx_noprivacy++; 839 goto out; 840 } 841 hdrspace = ieee80211_hdrspace(ic, wh); 842 key = ieee80211_crypto_decap(ni, m, hdrspace); 843 if (key == NULL) { 844 /* NB: stats+msgs handled in crypto_decap */ 845 goto out; 846 } 847 wh = mtod(m, struct ieee80211_frame *); 848 wh->i_fc[1] &= ~IEEE80211_FC1_WEP; 849 } 850 if (bpf_peers_present(vap->iv_rawbpf)) 851 bpf_mtap(vap->iv_rawbpf, m); 852 vap->iv_recv_mgmt(ni, m, subtype, rssi, noise, rstamp); 853 m_freem(m); 854 return IEEE80211_FC0_TYPE_MGT; 855 856 case IEEE80211_FC0_TYPE_CTL: 857 vap->iv_stats.is_rx_ctl++; 858 IEEE80211_NODE_STAT(ni, rx_ctrl); 859 switch (subtype) { 860 case IEEE80211_FC0_SUBTYPE_PS_POLL: 861 hostap_recv_pspoll(ni, m); 862 break; 863 case IEEE80211_FC0_SUBTYPE_BAR: 864 ieee80211_recv_bar(ni, m); 865 break; 866 } 867 goto out; 868 default: 869 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 870 wh, "bad", "frame type 0x%x", type); 871 /* should not come here */ 872 break; 873 } 874 err: 875 ifp->if_ierrors++; 876 out: 877 if (m != NULL) { 878 if (bpf_peers_present(vap->iv_rawbpf) && need_tap) 879 bpf_mtap(vap->iv_rawbpf, m); 880 m_freem(m); 881 } 882 return type; 883 #undef SEQ_LEQ 884 } 885 886 static void 887 hostap_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh, 888 int rssi, int noise, uint32_t rstamp, uint16_t seq, uint16_t status) 889 { 890 struct ieee80211vap *vap = ni->ni_vap; 891 892 KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state)); 893 894 if (ni->ni_authmode == IEEE80211_AUTH_SHARED) { 895 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 896 ni->ni_macaddr, "open auth", 897 "bad sta auth mode %u", ni->ni_authmode); 898 vap->iv_stats.is_rx_bad_auth++; /* XXX */ 899 /* 900 * Clear any challenge text that may be there if 901 * a previous shared key auth failed and then an 902 * open auth is attempted. 903 */ 904 if (ni->ni_challenge != NULL) { 905 free(ni->ni_challenge, M_80211_NODE); 906 ni->ni_challenge = NULL; 907 } 908 /* XXX hack to workaround calling convention */ 909 ieee80211_send_error(ni, wh->i_addr2, 910 IEEE80211_FC0_SUBTYPE_AUTH, 911 (seq + 1) | (IEEE80211_STATUS_ALG<<16)); 912 return; 913 } 914 if (seq != IEEE80211_AUTH_OPEN_REQUEST) { 915 vap->iv_stats.is_rx_bad_auth++; 916 return; 917 } 918 /* always accept open authentication requests */ 919 if (ni == vap->iv_bss) { 920 ni = ieee80211_dup_bss(vap, wh->i_addr2); 921 if (ni == NULL) 922 return; 923 } else if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0) 924 (void) ieee80211_ref_node(ni); 925 /* 926 * Mark the node as referenced to reflect that it's 927 * reference count has been bumped to insure it remains 928 * after the transaction completes. 929 */ 930 ni->ni_flags |= IEEE80211_NODE_AREF; 931 /* 932 * Mark the node as requiring a valid association id 933 * before outbound traffic is permitted. 934 */ 935 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 936 937 if (vap->iv_acl != NULL && 938 vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) { 939 /* 940 * When the ACL policy is set to RADIUS we defer the 941 * authorization to a user agent. Dispatch an event, 942 * a subsequent MLME call will decide the fate of the 943 * station. If the user agent is not present then the 944 * node will be reclaimed due to inactivity. 945 */ 946 IEEE80211_NOTE_MAC(vap, 947 IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, ni->ni_macaddr, 948 "%s", "station authentication defered (radius acl)"); 949 ieee80211_notify_node_auth(ni); 950 } else { 951 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 952 IEEE80211_NOTE_MAC(vap, 953 IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni->ni_macaddr, 954 "%s", "station authenticated (open)"); 955 /* 956 * When 802.1x is not in use mark the port 957 * authorized at this point so traffic can flow. 958 */ 959 if (ni->ni_authmode != IEEE80211_AUTH_8021X) 960 ieee80211_node_authorize(ni); 961 } 962 } 963 964 static void 965 hostap_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh, 966 uint8_t *frm, uint8_t *efrm, int rssi, int noise, uint32_t rstamp, 967 uint16_t seq, uint16_t status) 968 { 969 struct ieee80211vap *vap = ni->ni_vap; 970 uint8_t *challenge; 971 int allocbs, estatus; 972 973 KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state)); 974 975 /* 976 * NB: this can happen as we allow pre-shared key 977 * authentication to be enabled w/o wep being turned 978 * on so that configuration of these can be done 979 * in any order. It may be better to enforce the 980 * ordering in which case this check would just be 981 * for sanity/consistency. 982 */ 983 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 984 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 985 ni->ni_macaddr, "shared key auth", 986 "%s", " PRIVACY is disabled"); 987 estatus = IEEE80211_STATUS_ALG; 988 goto bad; 989 } 990 /* 991 * Pre-shared key authentication is evil; accept 992 * it only if explicitly configured (it is supported 993 * mainly for compatibility with clients like Mac OS X). 994 */ 995 if (ni->ni_authmode != IEEE80211_AUTH_AUTO && 996 ni->ni_authmode != IEEE80211_AUTH_SHARED) { 997 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 998 ni->ni_macaddr, "shared key auth", 999 "bad sta auth mode %u", ni->ni_authmode); 1000 vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */ 1001 estatus = IEEE80211_STATUS_ALG; 1002 goto bad; 1003 } 1004 1005 challenge = NULL; 1006 if (frm + 1 < efrm) { 1007 if ((frm[1] + 2) > (efrm - frm)) { 1008 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1009 ni->ni_macaddr, "shared key auth", 1010 "ie %d/%d too long", 1011 frm[0], (frm[1] + 2) - (efrm - frm)); 1012 vap->iv_stats.is_rx_bad_auth++; 1013 estatus = IEEE80211_STATUS_CHALLENGE; 1014 goto bad; 1015 } 1016 if (*frm == IEEE80211_ELEMID_CHALLENGE) 1017 challenge = frm; 1018 frm += frm[1] + 2; 1019 } 1020 switch (seq) { 1021 case IEEE80211_AUTH_SHARED_CHALLENGE: 1022 case IEEE80211_AUTH_SHARED_RESPONSE: 1023 if (challenge == NULL) { 1024 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1025 ni->ni_macaddr, "shared key auth", 1026 "%s", "no challenge"); 1027 vap->iv_stats.is_rx_bad_auth++; 1028 estatus = IEEE80211_STATUS_CHALLENGE; 1029 goto bad; 1030 } 1031 if (challenge[1] != IEEE80211_CHALLENGE_LEN) { 1032 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1033 ni->ni_macaddr, "shared key auth", 1034 "bad challenge len %d", challenge[1]); 1035 vap->iv_stats.is_rx_bad_auth++; 1036 estatus = IEEE80211_STATUS_CHALLENGE; 1037 goto bad; 1038 } 1039 default: 1040 break; 1041 } 1042 switch (seq) { 1043 case IEEE80211_AUTH_SHARED_REQUEST: 1044 if (ni == vap->iv_bss) { 1045 ni = ieee80211_dup_bss(vap, wh->i_addr2); 1046 if (ni == NULL) { 1047 /* NB: no way to return an error */ 1048 return; 1049 } 1050 allocbs = 1; 1051 } else { 1052 if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1053 (void) ieee80211_ref_node(ni); 1054 allocbs = 0; 1055 } 1056 /* 1057 * Mark the node as referenced to reflect that it's 1058 * reference count has been bumped to insure it remains 1059 * after the transaction completes. 1060 */ 1061 ni->ni_flags |= IEEE80211_NODE_AREF; 1062 /* 1063 * Mark the node as requiring a valid associatio id 1064 * before outbound traffic is permitted. 1065 */ 1066 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 1067 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1068 ni->ni_noise = noise; 1069 ni->ni_rstamp = rstamp; 1070 if (!ieee80211_alloc_challenge(ni)) { 1071 /* NB: don't return error so they rexmit */ 1072 return; 1073 } 1074 get_random_bytes(ni->ni_challenge, 1075 IEEE80211_CHALLENGE_LEN); 1076 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 1077 ni, "shared key %sauth request", allocbs ? "" : "re"); 1078 /* 1079 * When the ACL policy is set to RADIUS we defer the 1080 * authorization to a user agent. Dispatch an event, 1081 * a subsequent MLME call will decide the fate of the 1082 * station. If the user agent is not present then the 1083 * node will be reclaimed due to inactivity. 1084 */ 1085 if (vap->iv_acl != NULL && 1086 vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) { 1087 IEEE80211_NOTE_MAC(vap, 1088 IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, 1089 ni->ni_macaddr, 1090 "%s", "station authentication defered (radius acl)"); 1091 ieee80211_notify_node_auth(ni); 1092 return; 1093 } 1094 break; 1095 case IEEE80211_AUTH_SHARED_RESPONSE: 1096 if (ni == vap->iv_bss) { 1097 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1098 ni->ni_macaddr, "shared key response", 1099 "%s", "unknown station"); 1100 /* NB: don't send a response */ 1101 return; 1102 } 1103 if (ni->ni_challenge == NULL) { 1104 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1105 ni->ni_macaddr, "shared key response", 1106 "%s", "no challenge recorded"); 1107 vap->iv_stats.is_rx_bad_auth++; 1108 estatus = IEEE80211_STATUS_CHALLENGE; 1109 goto bad; 1110 } 1111 if (memcmp(ni->ni_challenge, &challenge[2], 1112 challenge[1]) != 0) { 1113 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1114 ni->ni_macaddr, "shared key response", 1115 "%s", "challenge mismatch"); 1116 vap->iv_stats.is_rx_auth_fail++; 1117 estatus = IEEE80211_STATUS_CHALLENGE; 1118 goto bad; 1119 } 1120 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 1121 ni, "%s", "station authenticated (shared key)"); 1122 ieee80211_node_authorize(ni); 1123 break; 1124 default: 1125 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1126 ni->ni_macaddr, "shared key auth", 1127 "bad seq %d", seq); 1128 vap->iv_stats.is_rx_bad_auth++; 1129 estatus = IEEE80211_STATUS_SEQUENCE; 1130 goto bad; 1131 } 1132 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 1133 return; 1134 bad: 1135 /* 1136 * Send an error response; but only when operating as an AP. 1137 */ 1138 /* XXX hack to workaround calling convention */ 1139 ieee80211_send_error(ni, wh->i_addr2, 1140 IEEE80211_FC0_SUBTYPE_AUTH, 1141 (seq + 1) | (estatus<<16)); 1142 } 1143 1144 /* 1145 * Convert a WPA cipher selector OUI to an internal 1146 * cipher algorithm. Where appropriate we also 1147 * record any key length. 1148 */ 1149 static int 1150 wpa_cipher(const uint8_t *sel, uint8_t *keylen) 1151 { 1152 #define WPA_SEL(x) (((x)<<24)|WPA_OUI) 1153 uint32_t w = LE_READ_4(sel); 1154 1155 switch (w) { 1156 case WPA_SEL(WPA_CSE_NULL): 1157 return IEEE80211_CIPHER_NONE; 1158 case WPA_SEL(WPA_CSE_WEP40): 1159 if (keylen) 1160 *keylen = 40 / NBBY; 1161 return IEEE80211_CIPHER_WEP; 1162 case WPA_SEL(WPA_CSE_WEP104): 1163 if (keylen) 1164 *keylen = 104 / NBBY; 1165 return IEEE80211_CIPHER_WEP; 1166 case WPA_SEL(WPA_CSE_TKIP): 1167 return IEEE80211_CIPHER_TKIP; 1168 case WPA_SEL(WPA_CSE_CCMP): 1169 return IEEE80211_CIPHER_AES_CCM; 1170 } 1171 return 32; /* NB: so 1<< is discarded */ 1172 #undef WPA_SEL 1173 } 1174 1175 /* 1176 * Convert a WPA key management/authentication algorithm 1177 * to an internal code. 1178 */ 1179 static int 1180 wpa_keymgmt(const uint8_t *sel) 1181 { 1182 #define WPA_SEL(x) (((x)<<24)|WPA_OUI) 1183 uint32_t w = LE_READ_4(sel); 1184 1185 switch (w) { 1186 case WPA_SEL(WPA_ASE_8021X_UNSPEC): 1187 return WPA_ASE_8021X_UNSPEC; 1188 case WPA_SEL(WPA_ASE_8021X_PSK): 1189 return WPA_ASE_8021X_PSK; 1190 case WPA_SEL(WPA_ASE_NONE): 1191 return WPA_ASE_NONE; 1192 } 1193 return 0; /* NB: so is discarded */ 1194 #undef WPA_SEL 1195 } 1196 1197 /* 1198 * Parse a WPA information element to collect parameters. 1199 * Note that we do not validate security parameters; that 1200 * is handled by the authenticator; the parsing done here 1201 * is just for internal use in making operational decisions. 1202 */ 1203 static int 1204 ieee80211_parse_wpa(struct ieee80211vap *vap, const uint8_t *frm, 1205 struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh) 1206 { 1207 uint8_t len = frm[1]; 1208 uint32_t w; 1209 int n; 1210 1211 /* 1212 * Check the length once for fixed parts: OUI, type, 1213 * version, mcast cipher, and 2 selector counts. 1214 * Other, variable-length data, must be checked separately. 1215 */ 1216 if ((vap->iv_flags & IEEE80211_F_WPA1) == 0) { 1217 IEEE80211_DISCARD_IE(vap, 1218 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1219 wh, "WPA", "not WPA, flags 0x%x", vap->iv_flags); 1220 return IEEE80211_REASON_IE_INVALID; 1221 } 1222 if (len < 14) { 1223 IEEE80211_DISCARD_IE(vap, 1224 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1225 wh, "WPA", "too short, len %u", len); 1226 return IEEE80211_REASON_IE_INVALID; 1227 } 1228 frm += 6, len -= 4; /* NB: len is payload only */ 1229 /* NB: iswapoui already validated the OUI and type */ 1230 w = LE_READ_2(frm); 1231 if (w != WPA_VERSION) { 1232 IEEE80211_DISCARD_IE(vap, 1233 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1234 wh, "WPA", "bad version %u", w); 1235 return IEEE80211_REASON_IE_INVALID; 1236 } 1237 frm += 2, len -= 2; 1238 1239 memset(rsn, 0, sizeof(*rsn)); 1240 1241 /* multicast/group cipher */ 1242 rsn->rsn_mcastcipher = wpa_cipher(frm, &rsn->rsn_mcastkeylen); 1243 frm += 4, len -= 4; 1244 1245 /* unicast ciphers */ 1246 n = LE_READ_2(frm); 1247 frm += 2, len -= 2; 1248 if (len < n*4+2) { 1249 IEEE80211_DISCARD_IE(vap, 1250 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1251 wh, "WPA", "ucast cipher data too short; len %u, n %u", 1252 len, n); 1253 return IEEE80211_REASON_IE_INVALID; 1254 } 1255 w = 0; 1256 for (; n > 0; n--) { 1257 w |= 1<<wpa_cipher(frm, &rsn->rsn_ucastkeylen); 1258 frm += 4, len -= 4; 1259 } 1260 if (w & (1<<IEEE80211_CIPHER_TKIP)) 1261 rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP; 1262 else 1263 rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM; 1264 1265 /* key management algorithms */ 1266 n = LE_READ_2(frm); 1267 frm += 2, len -= 2; 1268 if (len < n*4) { 1269 IEEE80211_DISCARD_IE(vap, 1270 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1271 wh, "WPA", "key mgmt alg data too short; len %u, n %u", 1272 len, n); 1273 return IEEE80211_REASON_IE_INVALID; 1274 } 1275 w = 0; 1276 for (; n > 0; n--) { 1277 w |= wpa_keymgmt(frm); 1278 frm += 4, len -= 4; 1279 } 1280 if (w & WPA_ASE_8021X_UNSPEC) 1281 rsn->rsn_keymgmt = WPA_ASE_8021X_UNSPEC; 1282 else 1283 rsn->rsn_keymgmt = WPA_ASE_8021X_PSK; 1284 1285 if (len > 2) /* optional capabilities */ 1286 rsn->rsn_caps = LE_READ_2(frm); 1287 1288 return 0; 1289 } 1290 1291 /* 1292 * Convert an RSN cipher selector OUI to an internal 1293 * cipher algorithm. Where appropriate we also 1294 * record any key length. 1295 */ 1296 static int 1297 rsn_cipher(const uint8_t *sel, uint8_t *keylen) 1298 { 1299 #define RSN_SEL(x) (((x)<<24)|RSN_OUI) 1300 uint32_t w = LE_READ_4(sel); 1301 1302 switch (w) { 1303 case RSN_SEL(RSN_CSE_NULL): 1304 return IEEE80211_CIPHER_NONE; 1305 case RSN_SEL(RSN_CSE_WEP40): 1306 if (keylen) 1307 *keylen = 40 / NBBY; 1308 return IEEE80211_CIPHER_WEP; 1309 case RSN_SEL(RSN_CSE_WEP104): 1310 if (keylen) 1311 *keylen = 104 / NBBY; 1312 return IEEE80211_CIPHER_WEP; 1313 case RSN_SEL(RSN_CSE_TKIP): 1314 return IEEE80211_CIPHER_TKIP; 1315 case RSN_SEL(RSN_CSE_CCMP): 1316 return IEEE80211_CIPHER_AES_CCM; 1317 case RSN_SEL(RSN_CSE_WRAP): 1318 return IEEE80211_CIPHER_AES_OCB; 1319 } 1320 return 32; /* NB: so 1<< is discarded */ 1321 #undef WPA_SEL 1322 } 1323 1324 /* 1325 * Convert an RSN key management/authentication algorithm 1326 * to an internal code. 1327 */ 1328 static int 1329 rsn_keymgmt(const uint8_t *sel) 1330 { 1331 #define RSN_SEL(x) (((x)<<24)|RSN_OUI) 1332 uint32_t w = LE_READ_4(sel); 1333 1334 switch (w) { 1335 case RSN_SEL(RSN_ASE_8021X_UNSPEC): 1336 return RSN_ASE_8021X_UNSPEC; 1337 case RSN_SEL(RSN_ASE_8021X_PSK): 1338 return RSN_ASE_8021X_PSK; 1339 case RSN_SEL(RSN_ASE_NONE): 1340 return RSN_ASE_NONE; 1341 } 1342 return 0; /* NB: so is discarded */ 1343 #undef RSN_SEL 1344 } 1345 1346 /* 1347 * Parse a WPA/RSN information element to collect parameters 1348 * and validate the parameters against what has been 1349 * configured for the system. 1350 */ 1351 static int 1352 ieee80211_parse_rsn(struct ieee80211vap *vap, const uint8_t *frm, 1353 struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh) 1354 { 1355 uint8_t len = frm[1]; 1356 uint32_t w; 1357 int n; 1358 1359 /* 1360 * Check the length once for fixed parts: 1361 * version, mcast cipher, and 2 selector counts. 1362 * Other, variable-length data, must be checked separately. 1363 */ 1364 if ((vap->iv_flags & IEEE80211_F_WPA2) == 0) { 1365 IEEE80211_DISCARD_IE(vap, 1366 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1367 wh, "WPA", "not RSN, flags 0x%x", vap->iv_flags); 1368 return IEEE80211_REASON_IE_INVALID; 1369 } 1370 if (len < 10) { 1371 IEEE80211_DISCARD_IE(vap, 1372 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1373 wh, "RSN", "too short, len %u", len); 1374 return IEEE80211_REASON_IE_INVALID; 1375 } 1376 frm += 2; 1377 w = LE_READ_2(frm); 1378 if (w != RSN_VERSION) { 1379 IEEE80211_DISCARD_IE(vap, 1380 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1381 wh, "RSN", "bad version %u", w); 1382 return IEEE80211_REASON_IE_INVALID; 1383 } 1384 frm += 2, len -= 2; 1385 1386 memset(rsn, 0, sizeof(*rsn)); 1387 1388 /* multicast/group cipher */ 1389 rsn->rsn_mcastcipher = rsn_cipher(frm, &rsn->rsn_mcastkeylen); 1390 frm += 4, len -= 4; 1391 1392 /* unicast ciphers */ 1393 n = LE_READ_2(frm); 1394 frm += 2, len -= 2; 1395 if (len < n*4+2) { 1396 IEEE80211_DISCARD_IE(vap, 1397 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1398 wh, "RSN", "ucast cipher data too short; len %u, n %u", 1399 len, n); 1400 return IEEE80211_REASON_IE_INVALID; 1401 } 1402 w = 0; 1403 for (; n > 0; n--) { 1404 w |= 1<<rsn_cipher(frm, &rsn->rsn_ucastkeylen); 1405 frm += 4, len -= 4; 1406 } 1407 if (w & (1<<IEEE80211_CIPHER_TKIP)) 1408 rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP; 1409 else 1410 rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM; 1411 1412 /* key management algorithms */ 1413 n = LE_READ_2(frm); 1414 frm += 2, len -= 2; 1415 if (len < n*4) { 1416 IEEE80211_DISCARD_IE(vap, 1417 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1418 wh, "RSN", "key mgmt alg data too short; len %u, n %u", 1419 len, n); 1420 return IEEE80211_REASON_IE_INVALID; 1421 } 1422 w = 0; 1423 for (; n > 0; n--) { 1424 w |= rsn_keymgmt(frm); 1425 frm += 4, len -= 4; 1426 } 1427 if (w & RSN_ASE_8021X_UNSPEC) 1428 rsn->rsn_keymgmt = RSN_ASE_8021X_UNSPEC; 1429 else 1430 rsn->rsn_keymgmt = RSN_ASE_8021X_PSK; 1431 1432 /* optional RSN capabilities */ 1433 if (len > 2) 1434 rsn->rsn_caps = LE_READ_2(frm); 1435 /* XXXPMKID */ 1436 1437 return 0; 1438 } 1439 1440 /* 1441 * WPA/802.11i assocation request processing. 1442 */ 1443 static int 1444 wpa_assocreq(struct ieee80211_node *ni, struct ieee80211_rsnparms *rsnparms, 1445 const struct ieee80211_frame *wh, const uint8_t *wpa, 1446 const uint8_t *rsn, uint16_t capinfo) 1447 { 1448 struct ieee80211vap *vap = ni->ni_vap; 1449 uint8_t reason; 1450 int badwparsn; 1451 1452 ni->ni_flags &= ~(IEEE80211_NODE_WPS|IEEE80211_NODE_TSN); 1453 if (wpa == NULL && rsn == NULL) { 1454 if (vap->iv_flags_ext & IEEE80211_FEXT_WPS) { 1455 /* 1456 * W-Fi Protected Setup (WPS) permits 1457 * clients to associate and pass EAPOL frames 1458 * to establish initial credentials. 1459 */ 1460 ni->ni_flags |= IEEE80211_NODE_WPS; 1461 return 1; 1462 } 1463 if ((vap->iv_flags_ext & IEEE80211_FEXT_TSN) && 1464 (capinfo & IEEE80211_CAPINFO_PRIVACY)) { 1465 /* 1466 * Transitional Security Network. Permits clients 1467 * to associate and use WEP while WPA is configured. 1468 */ 1469 ni->ni_flags |= IEEE80211_NODE_TSN; 1470 return 1; 1471 } 1472 IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, 1473 wh, NULL, "%s", "no WPA/RSN IE in association request"); 1474 vap->iv_stats.is_rx_assoc_badwpaie++; 1475 reason = IEEE80211_REASON_IE_INVALID; 1476 goto bad; 1477 } 1478 /* assert right association security credentials */ 1479 badwparsn = 0; /* NB: to silence compiler */ 1480 switch (vap->iv_flags & IEEE80211_F_WPA) { 1481 case IEEE80211_F_WPA1: 1482 badwparsn = (wpa == NULL); 1483 break; 1484 case IEEE80211_F_WPA2: 1485 badwparsn = (rsn == NULL); 1486 break; 1487 case IEEE80211_F_WPA1|IEEE80211_F_WPA2: 1488 badwparsn = (wpa == NULL && rsn == NULL); 1489 break; 1490 } 1491 if (badwparsn) { 1492 IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, 1493 wh, NULL, 1494 "%s", "missing WPA/RSN IE in association request"); 1495 vap->iv_stats.is_rx_assoc_badwpaie++; 1496 reason = IEEE80211_REASON_IE_INVALID; 1497 goto bad; 1498 } 1499 /* 1500 * Parse WPA/RSN information element. 1501 */ 1502 if (wpa != NULL) 1503 reason = ieee80211_parse_wpa(vap, wpa, rsnparms, wh); 1504 else 1505 reason = ieee80211_parse_rsn(vap, rsn, rsnparms, wh); 1506 if (reason != 0) { 1507 /* XXX distinguish WPA/RSN? */ 1508 vap->iv_stats.is_rx_assoc_badwpaie++; 1509 goto bad; 1510 } 1511 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, ni, 1512 "%s ie: mc %u/%u uc %u/%u key %u caps 0x%x", 1513 wpa != NULL ? "WPA" : "RSN", 1514 rsnparms->rsn_mcastcipher, rsnparms->rsn_mcastkeylen, 1515 rsnparms->rsn_ucastcipher, rsnparms->rsn_ucastkeylen, 1516 rsnparms->rsn_keymgmt, rsnparms->rsn_caps); 1517 1518 return 1; 1519 bad: 1520 ieee80211_node_deauth(ni, reason); 1521 return 0; 1522 } 1523 1524 /* XXX find a better place for definition */ 1525 struct l2_update_frame { 1526 struct ether_header eh; 1527 uint8_t dsap; 1528 uint8_t ssap; 1529 uint8_t control; 1530 uint8_t xid[3]; 1531 } __packed; 1532 1533 /* 1534 * Deliver a TGf L2UF frame on behalf of a station. 1535 * This primes any bridge when the station is roaming 1536 * between ap's on the same wired network. 1537 */ 1538 static void 1539 ieee80211_deliver_l2uf(struct ieee80211_node *ni) 1540 { 1541 struct ieee80211vap *vap = ni->ni_vap; 1542 struct ifnet *ifp = vap->iv_ifp; 1543 struct mbuf *m; 1544 struct l2_update_frame *l2uf; 1545 struct ether_header *eh; 1546 1547 m = m_gethdr(M_NOWAIT, MT_DATA); 1548 if (m == NULL) { 1549 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 1550 "%s", "no mbuf for l2uf frame"); 1551 vap->iv_stats.is_rx_nobuf++; /* XXX not right */ 1552 return; 1553 } 1554 l2uf = mtod(m, struct l2_update_frame *); 1555 eh = &l2uf->eh; 1556 /* dst: Broadcast address */ 1557 IEEE80211_ADDR_COPY(eh->ether_dhost, ifp->if_broadcastaddr); 1558 /* src: associated STA */ 1559 IEEE80211_ADDR_COPY(eh->ether_shost, ni->ni_macaddr); 1560 eh->ether_type = htons(sizeof(*l2uf) - sizeof(*eh)); 1561 1562 l2uf->dsap = 0; 1563 l2uf->ssap = 0; 1564 l2uf->control = 0xf5; 1565 l2uf->xid[0] = 0x81; 1566 l2uf->xid[1] = 0x80; 1567 l2uf->xid[2] = 0x00; 1568 1569 m->m_pkthdr.len = m->m_len = sizeof(*l2uf); 1570 hostap_deliver_data(vap, ni, m); 1571 } 1572 1573 static void 1574 ratesetmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1575 int reassoc, int resp, const char *tag, int rate) 1576 { 1577 IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2, 1578 "deny %s request, %s rate set mismatch, rate/MCS %d", 1579 reassoc ? "reassoc" : "assoc", tag, rate & IEEE80211_RATE_VAL); 1580 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_BASIC_RATE); 1581 ieee80211_node_leave(ni); 1582 } 1583 1584 static void 1585 capinfomismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1586 int reassoc, int resp, const char *tag, int capinfo) 1587 { 1588 struct ieee80211vap *vap = ni->ni_vap; 1589 1590 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2, 1591 "deny %s request, %s mismatch 0x%x", 1592 reassoc ? "reassoc" : "assoc", tag, capinfo); 1593 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_CAPINFO); 1594 ieee80211_node_leave(ni); 1595 vap->iv_stats.is_rx_assoc_capmismatch++; 1596 } 1597 1598 static void 1599 htcapmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1600 int reassoc, int resp) 1601 { 1602 IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2, 1603 "deny %s request, %s missing HT ie", reassoc ? "reassoc" : "assoc"); 1604 /* XXX no better code */ 1605 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_OTHER); 1606 ieee80211_node_leave(ni); 1607 } 1608 1609 static void 1610 authalgreject(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1611 int algo, int seq, int status) 1612 { 1613 struct ieee80211vap *vap = ni->ni_vap; 1614 1615 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1616 wh, NULL, "unsupported alg %d", algo); 1617 vap->iv_stats.is_rx_auth_unsupported++; 1618 ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_AUTH, 1619 seq | (status << 16)); 1620 } 1621 1622 static __inline int 1623 ishtmixed(const uint8_t *ie) 1624 { 1625 const struct ieee80211_ie_htinfo *ht = 1626 (const struct ieee80211_ie_htinfo *) ie; 1627 return (ht->hi_byte2 & IEEE80211_HTINFO_OPMODE) == 1628 IEEE80211_HTINFO_OPMODE_MIXED; 1629 } 1630 1631 static int 1632 is11bclient(const uint8_t *rates, const uint8_t *xrates) 1633 { 1634 static const uint32_t brates = (1<<2*1)|(1<<2*2)|(1<<11)|(1<<2*11); 1635 int i; 1636 1637 /* NB: the 11b clients we care about will not have xrates */ 1638 if (xrates != NULL || rates == NULL) 1639 return 0; 1640 for (i = 0; i < rates[1]; i++) { 1641 int r = rates[2+i] & IEEE80211_RATE_VAL; 1642 if (r > 2*11 || ((1<<r) & brates) == 0) 1643 return 0; 1644 } 1645 return 1; 1646 } 1647 1648 static void 1649 hostap_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, 1650 int subtype, int rssi, int noise, uint32_t rstamp) 1651 { 1652 struct ieee80211vap *vap = ni->ni_vap; 1653 struct ieee80211com *ic = ni->ni_ic; 1654 struct ieee80211_frame *wh; 1655 uint8_t *frm, *efrm, *sfrm; 1656 uint8_t *ssid, *rates, *xrates, *wpa, *rsn, *wme, *ath, *htcap; 1657 int reassoc, resp; 1658 uint8_t rate; 1659 1660 wh = mtod(m0, struct ieee80211_frame *); 1661 frm = (uint8_t *)&wh[1]; 1662 efrm = mtod(m0, uint8_t *) + m0->m_len; 1663 switch (subtype) { 1664 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1665 case IEEE80211_FC0_SUBTYPE_BEACON: { 1666 struct ieee80211_scanparams scan; 1667 /* 1668 * We process beacon/probe response frames when scanning; 1669 * otherwise we check beacon frames for overlapping non-ERP 1670 * BSS in 11g and/or overlapping legacy BSS when in HT. 1671 */ 1672 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0 && 1673 subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) { 1674 vap->iv_stats.is_rx_mgtdiscard++; 1675 return; 1676 } 1677 /* NB: accept off-channel frames */ 1678 if (ieee80211_parse_beacon(ni, m0, &scan) &~ IEEE80211_BPARSE_OFFCHAN) 1679 return; 1680 /* 1681 * Count frame now that we know it's to be processed. 1682 */ 1683 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1684 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1685 IEEE80211_NODE_STAT(ni, rx_beacons); 1686 } else 1687 IEEE80211_NODE_STAT(ni, rx_proberesp); 1688 /* 1689 * If scanning, just pass information to the scan module. 1690 */ 1691 if (ic->ic_flags & IEEE80211_F_SCAN) { 1692 if (scan.status == 0 && /* NB: on channel */ 1693 (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN)) { 1694 /* 1695 * Actively scanning a channel marked passive; 1696 * send a probe request now that we know there 1697 * is 802.11 traffic present. 1698 * 1699 * XXX check if the beacon we recv'd gives 1700 * us what we need and suppress the probe req 1701 */ 1702 ieee80211_probe_curchan(vap, 1); 1703 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1704 } 1705 ieee80211_add_scan(vap, &scan, wh, 1706 subtype, rssi, noise, rstamp); 1707 return; 1708 } 1709 /* 1710 * Check beacon for overlapping bss w/ non ERP stations. 1711 * If we detect one and protection is configured but not 1712 * enabled, enable it and start a timer that'll bring us 1713 * out if we stop seeing the bss. 1714 */ 1715 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1716 scan.status == 0 && /* NB: on-channel */ 1717 ((scan.erp & 0x100) == 0 || /* NB: no ERP, 11b sta*/ 1718 (scan.erp & IEEE80211_ERP_NON_ERP_PRESENT))) { 1719 ic->ic_lastnonerp = ticks; 1720 ic->ic_flags_ext |= IEEE80211_FEXT_NONERP_PR; 1721 if (ic->ic_protmode != IEEE80211_PROT_NONE && 1722 (ic->ic_flags & IEEE80211_F_USEPROT) == 0) { 1723 IEEE80211_NOTE_FRAME(vap, 1724 IEEE80211_MSG_ASSOC, wh, 1725 "non-ERP present on channel %d " 1726 "(saw erp 0x%x from channel %d), " 1727 "enable use of protection", 1728 ic->ic_curchan->ic_ieee, 1729 scan.erp, scan.chan); 1730 ic->ic_flags |= IEEE80211_F_USEPROT; 1731 ieee80211_notify_erp(ic); 1732 } 1733 } 1734 /* 1735 * Check beacon for non-HT station on HT channel 1736 * and update HT BSS occupancy as appropriate. 1737 */ 1738 if (IEEE80211_IS_CHAN_HT(ic->ic_curchan)) { 1739 if (scan.status & IEEE80211_BPARSE_OFFCHAN) { 1740 /* 1741 * Off control channel; only check frames 1742 * that come in the extension channel when 1743 * operating w/ HT40. 1744 */ 1745 if (!IEEE80211_IS_CHAN_HT40(ic->ic_curchan)) 1746 break; 1747 if (scan.chan != ic->ic_curchan->ic_extieee) 1748 break; 1749 } 1750 if (scan.htinfo == NULL) { 1751 ieee80211_htprot_update(ic, 1752 IEEE80211_HTINFO_OPMODE_PROTOPT | 1753 IEEE80211_HTINFO_NONHT_PRESENT); 1754 } else if (ishtmixed(scan.htinfo)) { 1755 /* XXX? take NONHT_PRESENT from beacon? */ 1756 ieee80211_htprot_update(ic, 1757 IEEE80211_HTINFO_OPMODE_MIXED | 1758 IEEE80211_HTINFO_NONHT_PRESENT); 1759 } 1760 } 1761 break; 1762 } 1763 1764 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1765 if (vap->iv_state != IEEE80211_S_RUN) { 1766 vap->iv_stats.is_rx_mgtdiscard++; 1767 return; 1768 } 1769 /* 1770 * prreq frame format 1771 * [tlv] ssid 1772 * [tlv] supported rates 1773 * [tlv] extended supported rates 1774 */ 1775 ssid = rates = xrates = NULL; 1776 sfrm = frm; 1777 while (efrm - frm > 1) { 1778 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1779 switch (*frm) { 1780 case IEEE80211_ELEMID_SSID: 1781 ssid = frm; 1782 break; 1783 case IEEE80211_ELEMID_RATES: 1784 rates = frm; 1785 break; 1786 case IEEE80211_ELEMID_XRATES: 1787 xrates = frm; 1788 break; 1789 } 1790 frm += frm[1] + 2; 1791 } 1792 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1793 if (xrates != NULL) 1794 IEEE80211_VERIFY_ELEMENT(xrates, 1795 IEEE80211_RATE_MAXSIZE - rates[1], return); 1796 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 1797 IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return); 1798 if ((vap->iv_flags & IEEE80211_F_HIDESSID) && ssid[1] == 0) { 1799 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1800 wh, NULL, 1801 "%s", "no ssid with ssid suppression enabled"); 1802 vap->iv_stats.is_rx_ssidmismatch++; /*XXX*/ 1803 return; 1804 } 1805 1806 /* XXX find a better class or define it's own */ 1807 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 1808 "%s", "recv probe req"); 1809 /* 1810 * Some legacy 11b clients cannot hack a complete 1811 * probe response frame. When the request includes 1812 * only a bare-bones rate set, communicate this to 1813 * the transmit side. 1814 */ 1815 ieee80211_send_proberesp(vap, wh->i_addr2, 1816 is11bclient(rates, xrates) ? IEEE80211_SEND_LEGACY_11B : 0); 1817 break; 1818 1819 case IEEE80211_FC0_SUBTYPE_AUTH: { 1820 uint16_t algo, seq, status; 1821 1822 if (vap->iv_state != IEEE80211_S_RUN) { 1823 vap->iv_stats.is_rx_mgtdiscard++; 1824 return; 1825 } 1826 if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) { 1827 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1828 wh, NULL, "%s", "wrong bssid"); 1829 vap->iv_stats.is_rx_wrongbss++; /*XXX unique stat?*/ 1830 return; 1831 } 1832 /* 1833 * auth frame format 1834 * [2] algorithm 1835 * [2] sequence 1836 * [2] status 1837 * [tlv*] challenge 1838 */ 1839 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1840 algo = le16toh(*(uint16_t *)frm); 1841 seq = le16toh(*(uint16_t *)(frm + 2)); 1842 status = le16toh(*(uint16_t *)(frm + 4)); 1843 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2, 1844 "recv auth frame with algorithm %d seq %d", algo, seq); 1845 /* 1846 * Consult the ACL policy module if setup. 1847 */ 1848 if (vap->iv_acl != NULL && 1849 !vap->iv_acl->iac_check(vap, wh->i_addr2)) { 1850 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1851 wh, NULL, "%s", "disallowed by ACL"); 1852 vap->iv_stats.is_rx_acl++; 1853 ieee80211_send_error(ni, wh->i_addr2, 1854 IEEE80211_FC0_SUBTYPE_AUTH, 1855 (seq+1) | (IEEE80211_STATUS_UNSPECIFIED<<16)); 1856 return; 1857 } 1858 if (vap->iv_flags & IEEE80211_F_COUNTERM) { 1859 IEEE80211_DISCARD(vap, 1860 IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO, 1861 wh, NULL, "%s", "TKIP countermeasures enabled"); 1862 vap->iv_stats.is_rx_auth_countermeasures++; 1863 ieee80211_send_error(ni, wh->i_addr2, 1864 IEEE80211_FC0_SUBTYPE_AUTH, 1865 IEEE80211_REASON_MIC_FAILURE); 1866 return; 1867 } 1868 if (algo == IEEE80211_AUTH_ALG_SHARED) 1869 hostap_auth_shared(ni, wh, frm + 6, efrm, rssi, 1870 noise, rstamp, seq, status); 1871 else if (algo == IEEE80211_AUTH_ALG_OPEN) 1872 hostap_auth_open(ni, wh, rssi, noise, rstamp, 1873 seq, status); 1874 else if (algo == IEEE80211_AUTH_ALG_LEAP) { 1875 authalgreject(ni, wh, algo, 1876 seq+1, IEEE80211_STATUS_ALG); 1877 return; 1878 } else { 1879 /* 1880 * We assume that an unknown algorithm is the result 1881 * of a decryption failure on a shared key auth frame; 1882 * return a status code appropriate for that instead 1883 * of IEEE80211_STATUS_ALG. 1884 * 1885 * NB: a seq# of 4 is intentional; the decrypted 1886 * frame likely has a bogus seq value. 1887 */ 1888 authalgreject(ni, wh, algo, 1889 4, IEEE80211_STATUS_CHALLENGE); 1890 return; 1891 } 1892 break; 1893 } 1894 1895 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1896 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: { 1897 uint16_t capinfo, lintval; 1898 struct ieee80211_rsnparms rsnparms; 1899 1900 if (vap->iv_state != IEEE80211_S_RUN) { 1901 vap->iv_stats.is_rx_mgtdiscard++; 1902 return; 1903 } 1904 if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) { 1905 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1906 wh, NULL, "%s", "wrong bssid"); 1907 vap->iv_stats.is_rx_assoc_bss++; 1908 return; 1909 } 1910 if (subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) { 1911 reassoc = 1; 1912 resp = IEEE80211_FC0_SUBTYPE_REASSOC_RESP; 1913 } else { 1914 reassoc = 0; 1915 resp = IEEE80211_FC0_SUBTYPE_ASSOC_RESP; 1916 } 1917 if (ni == vap->iv_bss) { 1918 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2, 1919 "deny %s request, sta not authenticated", 1920 reassoc ? "reassoc" : "assoc"); 1921 ieee80211_send_error(ni, wh->i_addr2, 1922 IEEE80211_FC0_SUBTYPE_DEAUTH, 1923 IEEE80211_REASON_ASSOC_NOT_AUTHED); 1924 vap->iv_stats.is_rx_assoc_notauth++; 1925 return; 1926 } 1927 1928 /* 1929 * asreq frame format 1930 * [2] capability information 1931 * [2] listen interval 1932 * [6*] current AP address (reassoc only) 1933 * [tlv] ssid 1934 * [tlv] supported rates 1935 * [tlv] extended supported rates 1936 * [tlv] WPA or RSN 1937 * [tlv] HT capabilities 1938 * [tlv] Atheros capabilities 1939 */ 1940 IEEE80211_VERIFY_LENGTH(efrm - frm, (reassoc ? 10 : 4), return); 1941 capinfo = le16toh(*(uint16_t *)frm); frm += 2; 1942 lintval = le16toh(*(uint16_t *)frm); frm += 2; 1943 if (reassoc) 1944 frm += 6; /* ignore current AP info */ 1945 ssid = rates = xrates = wpa = rsn = wme = ath = htcap = NULL; 1946 sfrm = frm; 1947 while (efrm - frm > 1) { 1948 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1949 switch (*frm) { 1950 case IEEE80211_ELEMID_SSID: 1951 ssid = frm; 1952 break; 1953 case IEEE80211_ELEMID_RATES: 1954 rates = frm; 1955 break; 1956 case IEEE80211_ELEMID_XRATES: 1957 xrates = frm; 1958 break; 1959 case IEEE80211_ELEMID_RSN: 1960 rsn = frm; 1961 break; 1962 case IEEE80211_ELEMID_HTCAP: 1963 htcap = frm; 1964 break; 1965 case IEEE80211_ELEMID_VENDOR: 1966 if (iswpaoui(frm)) 1967 wpa = frm; 1968 else if (iswmeinfo(frm)) 1969 wme = frm; 1970 else if (isatherosoui(frm)) 1971 ath = frm; 1972 else if (vap->iv_flags_ext & IEEE80211_FEXT_HTCOMPAT) { 1973 if (ishtcapoui(frm) && htcap == NULL) 1974 htcap = frm; 1975 } 1976 break; 1977 } 1978 frm += frm[1] + 2; 1979 } 1980 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1981 if (xrates != NULL) 1982 IEEE80211_VERIFY_ELEMENT(xrates, 1983 IEEE80211_RATE_MAXSIZE - rates[1], return); 1984 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 1985 IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return); 1986 if (htcap != NULL) { 1987 IEEE80211_VERIFY_LENGTH(htcap[1], 1988 htcap[0] == IEEE80211_ELEMID_VENDOR ? 1989 4 + sizeof(struct ieee80211_ie_htcap)-2 : 1990 sizeof(struct ieee80211_ie_htcap)-2, 1991 return); /* XXX just NULL out? */ 1992 } 1993 1994 if ((vap->iv_flags & IEEE80211_F_WPA) && 1995 !wpa_assocreq(ni, &rsnparms, wh, wpa, rsn, capinfo)) 1996 return; 1997 /* discard challenge after association */ 1998 if (ni->ni_challenge != NULL) { 1999 free(ni->ni_challenge, M_80211_NODE); 2000 ni->ni_challenge = NULL; 2001 } 2002 /* NB: 802.11 spec says to ignore station's privacy bit */ 2003 if ((capinfo & IEEE80211_CAPINFO_ESS) == 0) { 2004 capinfomismatch(ni, wh, reassoc, resp, 2005 "capability", capinfo); 2006 return; 2007 } 2008 /* 2009 * Disallow re-associate w/ invalid slot time setting. 2010 */ 2011 if (ni->ni_associd != 0 && 2012 IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2013 ((ni->ni_capinfo ^ capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME)) { 2014 capinfomismatch(ni, wh, reassoc, resp, 2015 "slot time", capinfo); 2016 return; 2017 } 2018 rate = ieee80211_setup_rates(ni, rates, xrates, 2019 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 2020 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 2021 if (rate & IEEE80211_RATE_BASIC) { 2022 ratesetmismatch(ni, wh, reassoc, resp, "legacy", rate); 2023 vap->iv_stats.is_rx_assoc_norate++; 2024 return; 2025 } 2026 /* 2027 * If constrained to 11g-only stations reject an 2028 * 11b-only station. We cheat a bit here by looking 2029 * at the max negotiated xmit rate and assuming anyone 2030 * with a best rate <24Mb/s is an 11b station. 2031 */ 2032 if ((vap->iv_flags & IEEE80211_F_PUREG) && rate < 48) { 2033 ratesetmismatch(ni, wh, reassoc, resp, "11g", rate); 2034 vap->iv_stats.is_rx_assoc_norate++; 2035 return; 2036 } 2037 /* 2038 * Do HT rate set handling and setup HT node state. 2039 */ 2040 ni->ni_chan = vap->iv_bss->ni_chan; 2041 if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && htcap != NULL) { 2042 rate = ieee80211_setup_htrates(ni, htcap, 2043 IEEE80211_F_DOFMCS | IEEE80211_F_DONEGO | 2044 IEEE80211_F_DOBRS); 2045 if (rate & IEEE80211_RATE_BASIC) { 2046 ratesetmismatch(ni, wh, reassoc, resp, 2047 "HT", rate); 2048 vap->iv_stats.is_ht_assoc_norate++; 2049 return; 2050 } 2051 ieee80211_ht_node_init(ni); 2052 ieee80211_ht_updatehtcap(ni, htcap); 2053 } else if (ni->ni_flags & IEEE80211_NODE_HT) 2054 ieee80211_ht_node_cleanup(ni); 2055 /* 2056 * Allow AMPDU operation only with unencrypted traffic 2057 * or AES-CCM; the 11n spec only specifies these ciphers 2058 * so permitting any others is undefined and can lead 2059 * to interoperability problems. 2060 */ 2061 if ((ni->ni_flags & IEEE80211_NODE_HT) && 2062 (((vap->iv_flags & IEEE80211_F_WPA) && 2063 rsnparms.rsn_ucastcipher != IEEE80211_CIPHER_AES_CCM) || 2064 (vap->iv_flags & (IEEE80211_F_WPA|IEEE80211_F_PRIVACY)) == IEEE80211_F_PRIVACY)) { 2065 IEEE80211_NOTE(vap, 2066 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 2067 "disallow HT use because WEP or TKIP requested, " 2068 "capinfo 0x%x ucastcipher %d", capinfo, 2069 rsnparms.rsn_ucastcipher); 2070 ieee80211_ht_node_cleanup(ni); 2071 vap->iv_stats.is_ht_assoc_downgrade++; 2072 } 2073 /* 2074 * If constrained to 11n-only stations reject legacy stations. 2075 */ 2076 if ((vap->iv_flags_ext & IEEE80211_FEXT_PUREN) && 2077 (ni->ni_flags & IEEE80211_NODE_HT) == 0) { 2078 htcapmismatch(ni, wh, reassoc, resp); 2079 vap->iv_stats.is_ht_assoc_nohtcap++; 2080 return; 2081 } 2082 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 2083 ni->ni_noise = noise; 2084 ni->ni_rstamp = rstamp; 2085 ni->ni_intval = lintval; 2086 ni->ni_capinfo = capinfo; 2087 ni->ni_fhdwell = vap->iv_bss->ni_fhdwell; 2088 ni->ni_fhindex = vap->iv_bss->ni_fhindex; 2089 /* 2090 * Store the IEs. 2091 * XXX maybe better to just expand 2092 */ 2093 if (ieee80211_ies_init(&ni->ni_ies, sfrm, efrm - sfrm)) { 2094 #define setie(_ie, _off) ieee80211_ies_setie(ni->ni_ies, _ie, _off) 2095 if (wpa != NULL) 2096 setie(wpa_ie, wpa - sfrm); 2097 if (rsn != NULL) 2098 setie(rsn_ie, rsn - sfrm); 2099 if (htcap != NULL) 2100 setie(htcap_ie, htcap - sfrm); 2101 if (wme != NULL) { 2102 setie(wme_ie, wme - sfrm); 2103 /* 2104 * Mark node as capable of QoS. 2105 */ 2106 ni->ni_flags |= IEEE80211_NODE_QOS; 2107 } else 2108 ni->ni_flags &= ~IEEE80211_NODE_QOS; 2109 if (ath != NULL) { 2110 setie(ath_ie, ath - sfrm); 2111 /* 2112 * Parse ATH station parameters. 2113 */ 2114 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 2115 } else 2116 ni->ni_ath_flags = 0; 2117 #undef setie 2118 } else { 2119 ni->ni_flags &= ~IEEE80211_NODE_QOS; 2120 ni->ni_ath_flags = 0; 2121 } 2122 ieee80211_node_join(ni, resp); 2123 ieee80211_deliver_l2uf(ni); 2124 break; 2125 } 2126 2127 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2128 case IEEE80211_FC0_SUBTYPE_DISASSOC: { 2129 uint16_t reason; 2130 2131 if (vap->iv_state != IEEE80211_S_RUN || 2132 /* NB: can happen when in promiscuous mode */ 2133 !IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 2134 vap->iv_stats.is_rx_mgtdiscard++; 2135 break; 2136 } 2137 /* 2138 * deauth/disassoc frame format 2139 * [2] reason 2140 */ 2141 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 2142 reason = le16toh(*(uint16_t *)frm); 2143 if (subtype == IEEE80211_FC0_SUBTYPE_DEAUTH) { 2144 vap->iv_stats.is_rx_deauth++; 2145 IEEE80211_NODE_STAT(ni, rx_deauth); 2146 } else { 2147 vap->iv_stats.is_rx_disassoc++; 2148 IEEE80211_NODE_STAT(ni, rx_disassoc); 2149 } 2150 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 2151 "recv %s (reason %d)", ieee80211_mgt_subtype_name[subtype >> 2152 IEEE80211_FC0_SUBTYPE_SHIFT], reason); 2153 if (ni != vap->iv_bss) 2154 ieee80211_node_leave(ni); 2155 break; 2156 } 2157 2158 case IEEE80211_FC0_SUBTYPE_ACTION: 2159 if (vap->iv_state == IEEE80211_S_RUN) { 2160 if (ieee80211_parse_action(ni, m0) == 0) 2161 ic->ic_recv_action(ni, frm, efrm); 2162 } else 2163 vap->iv_stats.is_rx_mgtdiscard++; 2164 break; 2165 2166 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2167 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2168 default: 2169 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2170 wh, "mgt", "subtype 0x%x not handled", subtype); 2171 vap->iv_stats.is_rx_badsubtype++; 2172 break; 2173 } 2174 } 2175 2176 /* 2177 * Process a received ps-poll frame. 2178 */ 2179 static void 2180 hostap_recv_pspoll(struct ieee80211_node *ni, struct mbuf *m0) 2181 { 2182 struct ieee80211vap *vap = ni->ni_vap; 2183 struct ieee80211_frame_min *wh; 2184 struct ifnet *ifp; 2185 struct mbuf *m; 2186 uint16_t aid; 2187 int qlen; 2188 2189 wh = mtod(m0, struct ieee80211_frame_min *); 2190 if (ni->ni_associd == 0) { 2191 IEEE80211_DISCARD(vap, 2192 IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG, 2193 (struct ieee80211_frame *) wh, NULL, 2194 "%s", "unassociated station"); 2195 vap->iv_stats.is_ps_unassoc++; 2196 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, 2197 IEEE80211_REASON_NOT_ASSOCED); 2198 return; 2199 } 2200 2201 aid = le16toh(*(uint16_t *)wh->i_dur); 2202 if (aid != ni->ni_associd) { 2203 IEEE80211_DISCARD(vap, 2204 IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG, 2205 (struct ieee80211_frame *) wh, NULL, 2206 "aid mismatch: sta aid 0x%x poll aid 0x%x", 2207 ni->ni_associd, aid); 2208 vap->iv_stats.is_ps_badaid++; 2209 /* 2210 * NB: We used to deauth the station but it turns out 2211 * the Blackberry Curve 8230 (and perhaps other devices) 2212 * sometimes send the wrong AID when WME is negotiated. 2213 * Being more lenient here seems ok as we already check 2214 * the station is associated and we only return frames 2215 * queued for the station (i.e. we don't use the AID). 2216 */ 2217 return; 2218 } 2219 2220 /* Okay, take the first queued packet and put it out... */ 2221 m = ieee80211_node_psq_dequeue(ni, &qlen); 2222 if (m == NULL) { 2223 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_POWER, wh->i_addr2, 2224 "%s", "recv ps-poll, but queue empty"); 2225 ieee80211_send_nulldata(ieee80211_ref_node(ni)); 2226 vap->iv_stats.is_ps_qempty++; /* XXX node stat */ 2227 if (vap->iv_set_tim != NULL) 2228 vap->iv_set_tim(ni, 0); /* just in case */ 2229 return; 2230 } 2231 /* 2232 * If there are more packets, set the more packets bit 2233 * in the packet dispatched to the station; otherwise 2234 * turn off the TIM bit. 2235 */ 2236 if (qlen != 0) { 2237 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 2238 "recv ps-poll, send packet, %u still queued", qlen); 2239 m->m_flags |= M_MORE_DATA; 2240 } else { 2241 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 2242 "%s", "recv ps-poll, send packet, queue empty"); 2243 if (vap->iv_set_tim != NULL) 2244 vap->iv_set_tim(ni, 0); 2245 } 2246 m->m_flags |= M_PWR_SAV; /* bypass PS handling */ 2247 2248 if (m->m_flags & M_ENCAP) 2249 ifp = vap->iv_ic->ic_ifp; 2250 else 2251 ifp = vap->iv_ifp; 2252 IF_ENQUEUE(&ifp->if_snd, m); 2253 if_start(ifp); 2254 } 2255