1/*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28/* 29 * IEEE 802.11 HOSTAP mode support. 30 */ 31#include "opt_inet.h" 32#include "opt_wlan.h" 33 34#include <sys/param.h> 35#include <sys/systm.h> 36#include <sys/mbuf.h> 37#include <sys/malloc.h> 38#include <sys/kernel.h> 39 40#include <sys/socket.h> 41#include <sys/sockio.h> 42#include <sys/endian.h> 43#include <sys/errno.h> 44#include <sys/proc.h> 45#include <sys/sysctl.h> 46 47#include <net/if.h> 48#include <net/if_var.h> 49#include <net/if_media.h> 50#include <net/if_llc.h> 51#include <net/if_private.h> 52#include <net/ethernet.h> 53 54#include <net/bpf.h> 55 56#include <net80211/ieee80211_var.h> 57#include <net80211/ieee80211_hostap.h> 58#include <net80211/ieee80211_input.h> 59#ifdef IEEE80211_SUPPORT_SUPERG 60#include <net80211/ieee80211_superg.h> 61#endif 62#include <net80211/ieee80211_wds.h> 63#include <net80211/ieee80211_vht.h> 64#include <net80211/ieee80211_sta.h> /* for parse_wmeie */ 65 66#define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2) 67 68static void hostap_vattach(struct ieee80211vap *); 69static int hostap_newstate(struct ieee80211vap *, enum ieee80211_state, int); 70static int hostap_input(struct ieee80211_node *ni, struct mbuf *m, 71 const struct ieee80211_rx_stats *, 72 int rssi, int nf); 73static void hostap_deliver_data(struct ieee80211vap *, 74 struct ieee80211_node *, struct mbuf *); 75static void hostap_recv_mgmt(struct ieee80211_node *, struct mbuf *, 76 int subtype, const struct ieee80211_rx_stats *rxs, int rssi, int nf); 77static void hostap_recv_ctl(struct ieee80211_node *, struct mbuf *, int); 78 79void 80ieee80211_hostap_attach(struct ieee80211com *ic) 81{ 82 ic->ic_vattach[IEEE80211_M_HOSTAP] = hostap_vattach; 83} 84 85void 86ieee80211_hostap_detach(struct ieee80211com *ic) 87{ 88} 89 90static void 91hostap_vdetach(struct ieee80211vap *vap) 92{ 93} 94 95static void 96hostap_vattach(struct ieee80211vap *vap) 97{ 98 vap->iv_newstate = hostap_newstate; 99 vap->iv_input = hostap_input; 100 vap->iv_recv_mgmt = hostap_recv_mgmt; 101 vap->iv_recv_ctl = hostap_recv_ctl; 102 vap->iv_opdetach = hostap_vdetach; 103 vap->iv_deliver_data = hostap_deliver_data; 104 vap->iv_recv_pspoll = ieee80211_recv_pspoll; 105} 106 107static void 108sta_disassoc(void *arg, struct ieee80211_node *ni) 109{ 110 111 if (ni->ni_associd != 0) { 112 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DISASSOC, 113 IEEE80211_REASON_ASSOC_LEAVE); 114 ieee80211_node_leave(ni); 115 } 116} 117 118static void 119sta_csa(void *arg, struct ieee80211_node *ni) 120{ 121 struct ieee80211vap *vap = ni->ni_vap; 122 123 if (ni->ni_associd != 0) 124 if (ni->ni_inact > vap->iv_inact_init) { 125 ni->ni_inact = vap->iv_inact_init; 126 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni, 127 "%s: inact %u", __func__, ni->ni_inact); 128 } 129} 130 131static void 132sta_drop(void *arg, struct ieee80211_node *ni) 133{ 134 135 if (ni->ni_associd != 0) 136 ieee80211_node_leave(ni); 137} 138 139/* 140 * Does a channel change require associated stations to re-associate 141 * so protocol state is correct. This is used when doing CSA across 142 * bands or similar (e.g. HT -> legacy). 143 */ 144static int 145isbandchange(struct ieee80211com *ic) 146{ 147 return ((ic->ic_bsschan->ic_flags ^ ic->ic_csa_newchan->ic_flags) & 148 (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_HALF | 149 IEEE80211_CHAN_QUARTER | IEEE80211_CHAN_HT)) != 0; 150} 151 152/* 153 * IEEE80211_M_HOSTAP vap state machine handler. 154 */ 155static int 156hostap_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 157{ 158 struct ieee80211com *ic = vap->iv_ic; 159 enum ieee80211_state ostate; 160 161 IEEE80211_LOCK_ASSERT(ic); 162 163 ostate = vap->iv_state; 164 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 165 __func__, ieee80211_state_name[ostate], 166 ieee80211_state_name[nstate], arg); 167 vap->iv_state = nstate; /* state transition */ 168 if (ostate != IEEE80211_S_SCAN) 169 ieee80211_cancel_scan(vap); /* background scan */ 170 switch (nstate) { 171 case IEEE80211_S_INIT: 172 switch (ostate) { 173 case IEEE80211_S_SCAN: 174 ieee80211_cancel_scan(vap); 175 break; 176 case IEEE80211_S_CAC: 177 ieee80211_dfs_cac_stop(vap); 178 break; 179 case IEEE80211_S_RUN: 180 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, 181 sta_disassoc, NULL); 182 break; 183 default: 184 break; 185 } 186 if (ostate != IEEE80211_S_INIT) { 187 /* NB: optimize INIT -> INIT case */ 188 ieee80211_reset_bss(vap); 189 } 190 if (vap->iv_auth->ia_detach != NULL) 191 vap->iv_auth->ia_detach(vap); 192 break; 193 case IEEE80211_S_SCAN: 194 switch (ostate) { 195 case IEEE80211_S_CSA: 196 case IEEE80211_S_RUN: 197 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, 198 sta_disassoc, NULL); 199 /* 200 * Clear overlapping BSS state; the beacon frame 201 * will be reconstructed on transition to the RUN 202 * state and the timeout routines check if the flag 203 * is set before doing anything so this is sufficient. 204 */ 205 vap->iv_flags_ext &= ~IEEE80211_FEXT_NONERP_PR; 206 vap->iv_flags_ht &= ~IEEE80211_FHT_NONHT_PR; 207 /* XXX TODO: schedule deferred update? */ 208 /* fall thru... */ 209 case IEEE80211_S_CAC: 210 /* 211 * NB: We may get here because of a manual channel 212 * change in which case we need to stop CAC 213 * XXX no need to stop if ostate RUN but it's ok 214 */ 215 ieee80211_dfs_cac_stop(vap); 216 /* fall thru... */ 217 case IEEE80211_S_INIT: 218 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 219 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan)) { 220 /* 221 * Already have a channel; bypass the 222 * scan and startup immediately. 223 * ieee80211_create_ibss will call back to 224 * move us to RUN state. 225 */ 226 ieee80211_create_ibss(vap, vap->iv_des_chan); 227 break; 228 } 229 /* 230 * Initiate a scan. We can come here as a result 231 * of an IEEE80211_IOC_SCAN_REQ too in which case 232 * the vap will be marked with IEEE80211_FEXT_SCANREQ 233 * and the scan request parameters will be present 234 * in iv_scanreq. Otherwise we do the default. 235 */ 236 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 237 ieee80211_check_scan(vap, 238 vap->iv_scanreq_flags, 239 vap->iv_scanreq_duration, 240 vap->iv_scanreq_mindwell, 241 vap->iv_scanreq_maxdwell, 242 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 243 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 244 } else 245 ieee80211_check_scan_current(vap); 246 break; 247 case IEEE80211_S_SCAN: 248 /* 249 * A state change requires a reset; scan. 250 */ 251 ieee80211_check_scan_current(vap); 252 break; 253 default: 254 break; 255 } 256 break; 257 case IEEE80211_S_CAC: 258 /* 259 * Start CAC on a DFS channel. We come here when starting 260 * a bss on a DFS channel (see ieee80211_create_ibss). 261 */ 262 ieee80211_dfs_cac_start(vap); 263 break; 264 case IEEE80211_S_RUN: 265 if (vap->iv_flags & IEEE80211_F_WPA) { 266 /* XXX validate prerequisites */ 267 } 268 switch (ostate) { 269 case IEEE80211_S_INIT: 270 /* 271 * Already have a channel; bypass the 272 * scan and startup immediately. 273 * Note that ieee80211_create_ibss will call 274 * back to do a RUN->RUN state change. 275 */ 276 ieee80211_create_ibss(vap, 277 ieee80211_ht_adjust_channel(ic, 278 ic->ic_curchan, vap->iv_flags_ht)); 279 /* NB: iv_bss is changed on return */ 280 break; 281 case IEEE80211_S_CAC: 282 /* 283 * NB: This is the normal state change when CAC 284 * expires and no radar was detected; no need to 285 * clear the CAC timer as it's already expired. 286 */ 287 /* fall thru... */ 288 case IEEE80211_S_CSA: 289 /* 290 * Shorten inactivity timer of associated stations 291 * to weed out sta's that don't follow a CSA. 292 */ 293 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, 294 sta_csa, NULL); 295 /* 296 * Update bss node channel to reflect where 297 * we landed after CSA. 298 */ 299 ieee80211_node_set_chan(vap->iv_bss, 300 ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 301 ieee80211_htchanflags(vap->iv_bss->ni_chan))); 302 /* XXX bypass debug msgs */ 303 break; 304 case IEEE80211_S_SCAN: 305 case IEEE80211_S_RUN: 306#ifdef IEEE80211_DEBUG 307 if (ieee80211_msg_debug(vap)) { 308 struct ieee80211_node *ni = vap->iv_bss; 309 ieee80211_note(vap, 310 "synchronized with %s ssid ", 311 ether_sprintf(ni->ni_bssid)); 312 ieee80211_print_essid(ni->ni_essid, 313 ni->ni_esslen); 314 /* XXX MCS/HT */ 315 printf(" channel %d start %uMb\n", 316 ieee80211_chan2ieee(ic, ic->ic_curchan), 317 IEEE80211_RATE2MBS(ni->ni_txrate)); 318 } 319#endif 320 break; 321 default: 322 break; 323 } 324 /* 325 * Start/stop the authenticator. We delay until here 326 * to allow configuration to happen out of order. 327 */ 328 if (vap->iv_auth->ia_attach != NULL) { 329 /* XXX check failure */ 330 vap->iv_auth->ia_attach(vap); 331 } else if (vap->iv_auth->ia_detach != NULL) { 332 vap->iv_auth->ia_detach(vap); 333 } 334 ieee80211_node_authorize(vap->iv_bss); 335 break; 336 case IEEE80211_S_CSA: 337 if (ostate == IEEE80211_S_RUN && isbandchange(ic)) { 338 /* 339 * On a ``band change'' silently drop associated 340 * stations as they must re-associate before they 341 * can pass traffic (as otherwise protocol state 342 * such as capabilities and the negotiated rate 343 * set may/will be wrong). 344 */ 345 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap, 346 sta_drop, NULL); 347 } 348 break; 349 default: 350 break; 351 } 352 return 0; 353} 354 355static void 356hostap_deliver_data(struct ieee80211vap *vap, 357 struct ieee80211_node *ni, struct mbuf *m) 358{ 359 struct ether_header *eh = mtod(m, struct ether_header *); 360 struct ifnet *ifp = vap->iv_ifp; 361 362 /* clear driver/net80211 flags before passing up */ 363 m->m_flags &= ~(M_MCAST | M_BCAST); 364 m_clrprotoflags(m); 365 366 KASSERT(vap->iv_opmode == IEEE80211_M_HOSTAP, 367 ("gack, opmode %d", vap->iv_opmode)); 368 /* 369 * Do accounting. 370 */ 371 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1); 372 IEEE80211_NODE_STAT(ni, rx_data); 373 IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len); 374 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 375 m->m_flags |= M_MCAST; /* XXX M_BCAST? */ 376 IEEE80211_NODE_STAT(ni, rx_mcast); 377 } else 378 IEEE80211_NODE_STAT(ni, rx_ucast); 379 380 /* perform as a bridge within the AP */ 381 if ((vap->iv_flags & IEEE80211_F_NOBRIDGE) == 0) { 382 struct mbuf *mcopy = NULL; 383 384 if (m->m_flags & M_MCAST) { 385 mcopy = m_dup(m, IEEE80211_M_NOWAIT); 386 if (mcopy == NULL) 387 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 388 else 389 mcopy->m_flags |= M_MCAST; 390 } else { 391 /* 392 * Check if the destination is associated with the 393 * same vap and authorized to receive traffic. 394 * Beware of traffic destined for the vap itself; 395 * sending it will not work; just let it be delivered 396 * normally. 397 */ 398 struct ieee80211_node *sta = ieee80211_find_vap_node( 399 &vap->iv_ic->ic_sta, vap, eh->ether_dhost); 400 if (sta != NULL) { 401 if (ieee80211_node_is_authorized(sta)) { 402 /* 403 * Beware of sending to ourself; this 404 * needs to happen via the normal 405 * input path. 406 */ 407 if (sta != vap->iv_bss) { 408 mcopy = m; 409 m = NULL; 410 } 411 } else { 412 vap->iv_stats.is_rx_unauth++; 413 IEEE80211_NODE_STAT(sta, rx_unauth); 414 } 415 ieee80211_free_node(sta); 416 } 417 } 418 if (mcopy != NULL) 419 (void) ieee80211_vap_xmitpkt(vap, mcopy); 420 } 421 if (m != NULL) { 422 struct epoch_tracker et; 423 424 /* 425 * Mark frame as coming from vap's interface. 426 */ 427 m->m_pkthdr.rcvif = ifp; 428 if (m->m_flags & M_MCAST) { 429 /* 430 * Spam DWDS vap's w/ multicast traffic. 431 */ 432 /* XXX only if dwds in use? */ 433 ieee80211_dwds_mcast(vap, m); 434 } 435 if (ni->ni_vlan != 0) { 436 /* attach vlan tag */ 437 m->m_pkthdr.ether_vtag = ni->ni_vlan; 438 m->m_flags |= M_VLANTAG; 439 } 440 NET_EPOCH_ENTER(et); 441 ifp->if_input(ifp, m); 442 NET_EPOCH_EXIT(et); 443 } 444} 445 446/* 447 * Decide if a received management frame should be 448 * printed when debugging is enabled. This filters some 449 * of the less interesting frames that come frequently 450 * (e.g. beacons). 451 */ 452static __inline int 453doprint(struct ieee80211vap *vap, int subtype) 454{ 455 switch (subtype) { 456 case IEEE80211_FC0_SUBTYPE_BEACON: 457 return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN); 458 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 459 return 0; 460 } 461 return 1; 462} 463 464/* 465 * Process a received frame. The node associated with the sender 466 * should be supplied. If nothing was found in the node table then 467 * the caller is assumed to supply a reference to iv_bss instead. 468 * The RSSI and a timestamp are also supplied. The RSSI data is used 469 * during AP scanning to select a AP to associate with; it can have 470 * any units so long as values have consistent units and higher values 471 * mean ``better signal''. The receive timestamp is currently not used 472 * by the 802.11 layer. 473 */ 474static int 475hostap_input(struct ieee80211_node *ni, struct mbuf *m, 476 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 477{ 478 struct ieee80211vap *vap = ni->ni_vap; 479 struct ieee80211com *ic = ni->ni_ic; 480 struct ifnet *ifp = vap->iv_ifp; 481 struct ieee80211_frame *wh; 482 struct ieee80211_key *key; 483 struct ether_header *eh; 484 int hdrspace, need_tap = 1; /* mbuf need to be tapped. */ 485 uint8_t dir, type, subtype, qos; 486 uint8_t *bssid; 487 int is_hw_decrypted = 0; 488 int has_decrypted = 0; 489 490 /* 491 * Some devices do hardware decryption all the way through 492 * to pretending the frame wasn't encrypted in the first place. 493 * So, tag it appropriately so it isn't discarded inappropriately. 494 */ 495 if ((rxs != NULL) && (rxs->c_pktflags & IEEE80211_RX_F_DECRYPTED)) 496 is_hw_decrypted = 1; 497 498 if (m->m_flags & M_AMPDU_MPDU) { 499 /* 500 * Fastpath for A-MPDU reorder q resubmission. Frames 501 * w/ M_AMPDU_MPDU marked have already passed through 502 * here but were received out of order and been held on 503 * the reorder queue. When resubmitted they are marked 504 * with the M_AMPDU_MPDU flag and we can bypass most of 505 * the normal processing. 506 */ 507 wh = mtod(m, struct ieee80211_frame *); 508 type = IEEE80211_FC0_TYPE_DATA; 509 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 510 subtype = IEEE80211_FC0_SUBTYPE_QOS_DATA; 511 hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ 512 goto resubmit_ampdu; 513 } 514 515 KASSERT(ni != NULL, ("null node")); 516 ni->ni_inact = ni->ni_inact_reload; 517 518 type = -1; /* undefined */ 519 520 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 521 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 522 ni->ni_macaddr, NULL, 523 "too short (1): len %u", m->m_pkthdr.len); 524 vap->iv_stats.is_rx_tooshort++; 525 goto out; 526 } 527 /* 528 * Bit of a cheat here, we use a pointer for a 3-address 529 * frame format but don't reference fields past outside 530 * ieee80211_frame_min w/o first validating the data is 531 * present. 532 */ 533 wh = mtod(m, struct ieee80211_frame *); 534 535 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 536 IEEE80211_FC0_VERSION_0) { 537 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 538 ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x", 539 wh->i_fc[0], wh->i_fc[1]); 540 vap->iv_stats.is_rx_badversion++; 541 goto err; 542 } 543 544 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 545 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 546 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 547 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 548 if (dir != IEEE80211_FC1_DIR_NODS) 549 bssid = wh->i_addr1; 550 else if (type == IEEE80211_FC0_TYPE_CTL) 551 bssid = wh->i_addr1; 552 else { 553 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 554 IEEE80211_DISCARD_MAC(vap, 555 IEEE80211_MSG_ANY, ni->ni_macaddr, 556 NULL, "too short (2): len %u", 557 m->m_pkthdr.len); 558 vap->iv_stats.is_rx_tooshort++; 559 goto out; 560 } 561 bssid = wh->i_addr3; 562 } 563 /* 564 * Validate the bssid. 565 */ 566 if (!(type == IEEE80211_FC0_TYPE_MGT && 567 subtype == IEEE80211_FC0_SUBTYPE_BEACON) && 568 !IEEE80211_ADDR_EQ(bssid, vap->iv_bss->ni_bssid) && 569 !IEEE80211_ADDR_EQ(bssid, ifp->if_broadcastaddr)) { 570 /* not interested in */ 571 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 572 bssid, NULL, "%s", "not to bss"); 573 vap->iv_stats.is_rx_wrongbss++; 574 goto out; 575 } 576 577 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 578 ni->ni_noise = nf; 579 if (IEEE80211_HAS_SEQ(type, subtype)) { 580 uint8_t tid = ieee80211_gettid(wh); 581 if (IEEE80211_QOS_HAS_SEQ(wh) && 582 TID_TO_WME_AC(tid) >= WME_AC_VI) 583 ic->ic_wme.wme_hipri_traffic++; 584 if (! ieee80211_check_rxseq(ni, wh, bssid, rxs)) 585 goto out; 586 } 587 } 588 589 switch (type) { 590 case IEEE80211_FC0_TYPE_DATA: 591 hdrspace = ieee80211_hdrspace(ic, wh); 592 if (m->m_len < hdrspace && 593 (m = m_pullup(m, hdrspace)) == NULL) { 594 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 595 ni->ni_macaddr, NULL, 596 "data too short: expecting %u", hdrspace); 597 vap->iv_stats.is_rx_tooshort++; 598 goto out; /* XXX */ 599 } 600 if (!(dir == IEEE80211_FC1_DIR_TODS || 601 (dir == IEEE80211_FC1_DIR_DSTODS && 602 (vap->iv_flags & IEEE80211_F_DWDS)))) { 603 if (dir != IEEE80211_FC1_DIR_DSTODS) { 604 IEEE80211_DISCARD(vap, 605 IEEE80211_MSG_INPUT, wh, "data", 606 "incorrect dir 0x%x", dir); 607 } else { 608 IEEE80211_DISCARD(vap, 609 IEEE80211_MSG_INPUT | 610 IEEE80211_MSG_WDS, wh, 611 "4-address data", 612 "%s", "DWDS not enabled"); 613 } 614 vap->iv_stats.is_rx_wrongdir++; 615 goto out; 616 } 617 /* check if source STA is associated */ 618 if (ni == vap->iv_bss) { 619 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 620 wh, "data", "%s", "unknown src"); 621 ieee80211_send_error(ni, wh->i_addr2, 622 IEEE80211_FC0_SUBTYPE_DEAUTH, 623 IEEE80211_REASON_NOT_AUTHED); 624 vap->iv_stats.is_rx_notassoc++; 625 goto err; 626 } 627 if (ni->ni_associd == 0) { 628 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 629 wh, "data", "%s", "unassoc src"); 630 IEEE80211_SEND_MGMT(ni, 631 IEEE80211_FC0_SUBTYPE_DISASSOC, 632 IEEE80211_REASON_NOT_ASSOCED); 633 vap->iv_stats.is_rx_notassoc++; 634 goto err; 635 } 636 637 /* 638 * Check for power save state change. 639 * XXX out-of-order A-MPDU frames? 640 */ 641 if (((wh->i_fc[1] & IEEE80211_FC1_PWR_MGT) ^ 642 (ni->ni_flags & IEEE80211_NODE_PWR_MGT))) 643 vap->iv_node_ps(ni, 644 wh->i_fc[1] & IEEE80211_FC1_PWR_MGT); 645 /* 646 * For 4-address packets handle WDS discovery 647 * notifications. Once a WDS link is setup frames 648 * are just delivered to the WDS vap (see below). 649 */ 650 if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap == NULL) { 651 if (!ieee80211_node_is_authorized(ni)) { 652 IEEE80211_DISCARD(vap, 653 IEEE80211_MSG_INPUT | 654 IEEE80211_MSG_WDS, wh, 655 "4-address data", 656 "%s", "unauthorized port"); 657 vap->iv_stats.is_rx_unauth++; 658 IEEE80211_NODE_STAT(ni, rx_unauth); 659 goto err; 660 } 661 ieee80211_dwds_discover(ni, m); 662 return type; 663 } 664 665 /* 666 * Handle A-MPDU re-ordering. If the frame is to be 667 * processed directly then ieee80211_ampdu_reorder 668 * will return 0; otherwise it has consumed the mbuf 669 * and we should do nothing more with it. 670 */ 671 if ((m->m_flags & M_AMPDU) && 672 ieee80211_ampdu_reorder(ni, m, rxs) != 0) { 673 m = NULL; 674 goto out; 675 } 676 resubmit_ampdu: 677 678 /* 679 * Handle privacy requirements. Note that we 680 * must not be preempted from here until after 681 * we (potentially) call ieee80211_crypto_demic; 682 * otherwise we may violate assumptions in the 683 * crypto cipher modules used to do delayed update 684 * of replay sequence numbers. 685 */ 686 if (is_hw_decrypted || IEEE80211_IS_PROTECTED(wh)) { 687 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 688 /* 689 * Discard encrypted frames when privacy is off. 690 */ 691 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 692 wh, "WEP", "%s", "PRIVACY off"); 693 vap->iv_stats.is_rx_noprivacy++; 694 IEEE80211_NODE_STAT(ni, rx_noprivacy); 695 goto out; 696 } 697 if (ieee80211_crypto_decap(ni, m, hdrspace, &key) == 0) { 698 /* NB: stats+msgs handled in crypto_decap */ 699 IEEE80211_NODE_STAT(ni, rx_wepfail); 700 goto out; 701 } 702 wh = mtod(m, struct ieee80211_frame *); 703 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 704 has_decrypted = 1; 705 } else { 706 /* XXX M_WEP and IEEE80211_F_PRIVACY */ 707 key = NULL; 708 } 709 710 /* 711 * Save QoS bits for use below--before we strip the header. 712 */ 713 if (subtype == IEEE80211_FC0_SUBTYPE_QOS_DATA) 714 qos = ieee80211_getqos(wh)[0]; 715 else 716 qos = 0; 717 718 /* 719 * Next up, any fragmentation. 720 */ 721 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 722 m = ieee80211_defrag(ni, m, hdrspace, has_decrypted); 723 if (m == NULL) { 724 /* Fragment dropped or frame not complete yet */ 725 goto out; 726 } 727 } 728 wh = NULL; /* no longer valid, catch any uses */ 729 730 /* 731 * Next strip any MSDU crypto bits. 732 */ 733 if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) { 734 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 735 ni->ni_macaddr, "data", "%s", "demic error"); 736 vap->iv_stats.is_rx_demicfail++; 737 IEEE80211_NODE_STAT(ni, rx_demicfail); 738 goto out; 739 } 740 /* copy to listener after decrypt */ 741 if (ieee80211_radiotap_active_vap(vap)) 742 ieee80211_radiotap_rx(vap, m); 743 need_tap = 0; 744 /* 745 * Finally, strip the 802.11 header. 746 */ 747 m = ieee80211_decap(vap, m, hdrspace, qos); 748 if (m == NULL) { 749 /* XXX mask bit to check for both */ 750 /* don't count Null data frames as errors */ 751 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 752 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 753 goto out; 754 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 755 ni->ni_macaddr, "data", "%s", "decap error"); 756 vap->iv_stats.is_rx_decap++; 757 IEEE80211_NODE_STAT(ni, rx_decap); 758 goto err; 759 } 760 if (!(qos & IEEE80211_QOS_AMSDU)) 761 eh = mtod(m, struct ether_header *); 762 else 763 eh = NULL; 764 if (!ieee80211_node_is_authorized(ni)) { 765 /* 766 * Deny any non-PAE frames received prior to 767 * authorization. For open/shared-key 768 * authentication the port is mark authorized 769 * after authentication completes. For 802.1x 770 * the port is not marked authorized by the 771 * authenticator until the handshake has completed. 772 */ 773 if (eh == NULL || 774 eh->ether_type != htons(ETHERTYPE_PAE)) { 775 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 776 ni->ni_macaddr, "data", "unauthorized or " 777 "unknown port: ether type 0x%x len %u", 778 eh == NULL ? -1 : eh->ether_type, 779 m->m_pkthdr.len); 780 vap->iv_stats.is_rx_unauth++; 781 IEEE80211_NODE_STAT(ni, rx_unauth); 782 goto err; 783 } 784 } else { 785 /* 786 * When denying unencrypted frames, discard 787 * any non-PAE frames received without encryption. 788 */ 789 if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && 790 ((has_decrypted == 0) && (m->m_flags & M_WEP) == 0) && 791 (is_hw_decrypted == 0) && 792 (eh == NULL || 793 eh->ether_type != htons(ETHERTYPE_PAE))) { 794 /* 795 * Drop unencrypted frames. 796 */ 797 vap->iv_stats.is_rx_unencrypted++; 798 IEEE80211_NODE_STAT(ni, rx_unencrypted); 799 goto out; 800 } 801 } 802 /* XXX require HT? */ 803 if (qos & IEEE80211_QOS_AMSDU) { 804 m = ieee80211_decap_amsdu(ni, m); 805 if (m == NULL) 806 return IEEE80211_FC0_TYPE_DATA; 807 } else { 808#ifdef IEEE80211_SUPPORT_SUPERG 809 m = ieee80211_decap_fastframe(vap, ni, m); 810 if (m == NULL) 811 return IEEE80211_FC0_TYPE_DATA; 812#endif 813 } 814 if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap != NULL) 815 ieee80211_deliver_data(ni->ni_wdsvap, ni, m); 816 else 817 hostap_deliver_data(vap, ni, m); 818 return IEEE80211_FC0_TYPE_DATA; 819 820 case IEEE80211_FC0_TYPE_MGT: 821 vap->iv_stats.is_rx_mgmt++; 822 IEEE80211_NODE_STAT(ni, rx_mgmt); 823 if (dir != IEEE80211_FC1_DIR_NODS) { 824 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 825 wh, "mgt", "incorrect dir 0x%x", dir); 826 vap->iv_stats.is_rx_wrongdir++; 827 goto err; 828 } 829 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 830 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 831 ni->ni_macaddr, "mgt", "too short: len %u", 832 m->m_pkthdr.len); 833 vap->iv_stats.is_rx_tooshort++; 834 goto out; 835 } 836 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 837 /* ensure return frames are unicast */ 838 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 839 wh, NULL, "source is multicast: %s", 840 ether_sprintf(wh->i_addr2)); 841 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 842 goto out; 843 } 844#ifdef IEEE80211_DEBUG 845 if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) || 846 ieee80211_msg_dumppkts(vap)) { 847 if_printf(ifp, "received %s from %s rssi %d\n", 848 ieee80211_mgt_subtype_name(subtype), 849 ether_sprintf(wh->i_addr2), rssi); 850 } 851#endif 852 if (IEEE80211_IS_PROTECTED(wh)) { 853 if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) { 854 /* 855 * Only shared key auth frames with a challenge 856 * should be encrypted, discard all others. 857 */ 858 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 859 wh, NULL, 860 "%s", "WEP set but not permitted"); 861 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 862 goto out; 863 } 864 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 865 /* 866 * Discard encrypted frames when privacy is off. 867 */ 868 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 869 wh, NULL, "%s", "WEP set but PRIVACY off"); 870 vap->iv_stats.is_rx_noprivacy++; 871 goto out; 872 } 873 hdrspace = ieee80211_hdrspace(ic, wh); 874 if (ieee80211_crypto_decap(ni, m, hdrspace, &key) == 0) { 875 /* NB: stats+msgs handled in crypto_decap */ 876 goto out; 877 } 878 wh = mtod(m, struct ieee80211_frame *); 879 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 880 has_decrypted = 1; 881 } 882 /* 883 * Pass the packet to radiotap before calling iv_recv_mgmt(). 884 * Otherwise iv_recv_mgmt() might pass another packet to 885 * radiotap, resulting in out of order packet captures. 886 */ 887 if (ieee80211_radiotap_active_vap(vap)) 888 ieee80211_radiotap_rx(vap, m); 889 need_tap = 0; 890 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); 891 goto out; 892 893 case IEEE80211_FC0_TYPE_CTL: 894 vap->iv_stats.is_rx_ctl++; 895 IEEE80211_NODE_STAT(ni, rx_ctrl); 896 vap->iv_recv_ctl(ni, m, subtype); 897 goto out; 898 default: 899 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 900 wh, "bad", "frame type 0x%x", type); 901 /* should not come here */ 902 break; 903 } 904err: 905 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 906out: 907 if (m != NULL) { 908 if (need_tap && ieee80211_radiotap_active_vap(vap)) 909 ieee80211_radiotap_rx(vap, m); 910 m_freem(m); 911 } 912 return type; 913} 914 915static void 916hostap_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh, 917 int rssi, int nf, uint16_t seq, uint16_t status) 918{ 919 struct ieee80211vap *vap = ni->ni_vap; 920 921 KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state)); 922 923 if (ni->ni_authmode == IEEE80211_AUTH_SHARED) { 924 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 925 ni->ni_macaddr, "open auth", 926 "bad sta auth mode %u", ni->ni_authmode); 927 vap->iv_stats.is_rx_bad_auth++; /* XXX */ 928 /* 929 * Clear any challenge text that may be there if 930 * a previous shared key auth failed and then an 931 * open auth is attempted. 932 */ 933 if (ni->ni_challenge != NULL) { 934 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 935 ni->ni_challenge = NULL; 936 } 937 /* XXX hack to workaround calling convention */ 938 ieee80211_send_error(ni, wh->i_addr2, 939 IEEE80211_FC0_SUBTYPE_AUTH, 940 (seq + 1) | (IEEE80211_STATUS_ALG<<16)); 941 return; 942 } 943 if (seq != IEEE80211_AUTH_OPEN_REQUEST) { 944 vap->iv_stats.is_rx_bad_auth++; 945 return; 946 } 947 /* always accept open authentication requests */ 948 if (ni == vap->iv_bss) { 949 ni = ieee80211_dup_bss(vap, wh->i_addr2); 950 if (ni == NULL) 951 return; 952 } else if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0) 953 (void) ieee80211_ref_node(ni); 954 /* 955 * Mark the node as referenced to reflect that it's 956 * reference count has been bumped to insure it remains 957 * after the transaction completes. 958 */ 959 ni->ni_flags |= IEEE80211_NODE_AREF; 960 /* 961 * Mark the node as requiring a valid association id 962 * before outbound traffic is permitted. 963 */ 964 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 965 966 if (vap->iv_acl != NULL && 967 vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) { 968 /* 969 * When the ACL policy is set to RADIUS we defer the 970 * authorization to a user agent. Dispatch an event, 971 * a subsequent MLME call will decide the fate of the 972 * station. If the user agent is not present then the 973 * node will be reclaimed due to inactivity. 974 */ 975 IEEE80211_NOTE_MAC(vap, 976 IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, ni->ni_macaddr, 977 "%s", "station authentication deferred (radius acl)"); 978 ieee80211_notify_node_auth(ni); 979 } else { 980 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 981 IEEE80211_NOTE_MAC(vap, 982 IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni->ni_macaddr, 983 "%s", "station authenticated (open)"); 984 /* 985 * When 802.1x is not in use mark the port 986 * authorized at this point so traffic can flow. 987 */ 988 if (ni->ni_authmode != IEEE80211_AUTH_8021X) 989 ieee80211_node_authorize(ni); 990 } 991} 992 993static void 994hostap_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh, 995 uint8_t *frm, uint8_t *efrm, int rssi, int nf, 996 uint16_t seq, uint16_t status) 997{ 998 struct ieee80211vap *vap = ni->ni_vap; 999 uint8_t *challenge; 1000 int estatus; 1001 1002 KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state)); 1003 1004 /* 1005 * NB: this can happen as we allow pre-shared key 1006 * authentication to be enabled w/o wep being turned 1007 * on so that configuration of these can be done 1008 * in any order. It may be better to enforce the 1009 * ordering in which case this check would just be 1010 * for sanity/consistency. 1011 */ 1012 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 1013 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1014 ni->ni_macaddr, "shared key auth", 1015 "%s", " PRIVACY is disabled"); 1016 estatus = IEEE80211_STATUS_ALG; 1017 goto bad; 1018 } 1019 /* 1020 * Pre-shared key authentication is evil; accept 1021 * it only if explicitly configured (it is supported 1022 * mainly for compatibility with clients like Mac OS X). 1023 */ 1024 if (ni->ni_authmode != IEEE80211_AUTH_AUTO && 1025 ni->ni_authmode != IEEE80211_AUTH_SHARED) { 1026 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1027 ni->ni_macaddr, "shared key auth", 1028 "bad sta auth mode %u", ni->ni_authmode); 1029 vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */ 1030 estatus = IEEE80211_STATUS_ALG; 1031 goto bad; 1032 } 1033 1034 challenge = NULL; 1035 if (frm + 1 < efrm) { 1036 if ((frm[1] + 2) > (efrm - frm)) { 1037 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1038 ni->ni_macaddr, "shared key auth", 1039 "ie %d/%d too long", 1040 frm[0], (frm[1] + 2) - (efrm - frm)); 1041 vap->iv_stats.is_rx_bad_auth++; 1042 estatus = IEEE80211_STATUS_CHALLENGE; 1043 goto bad; 1044 } 1045 if (*frm == IEEE80211_ELEMID_CHALLENGE) 1046 challenge = frm; 1047 frm += frm[1] + 2; 1048 } 1049 switch (seq) { 1050 case IEEE80211_AUTH_SHARED_CHALLENGE: 1051 case IEEE80211_AUTH_SHARED_RESPONSE: 1052 if (challenge == NULL) { 1053 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1054 ni->ni_macaddr, "shared key auth", 1055 "%s", "no challenge"); 1056 vap->iv_stats.is_rx_bad_auth++; 1057 estatus = IEEE80211_STATUS_CHALLENGE; 1058 goto bad; 1059 } 1060 if (challenge[1] != IEEE80211_CHALLENGE_LEN) { 1061 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1062 ni->ni_macaddr, "shared key auth", 1063 "bad challenge len %d", challenge[1]); 1064 vap->iv_stats.is_rx_bad_auth++; 1065 estatus = IEEE80211_STATUS_CHALLENGE; 1066 goto bad; 1067 } 1068 default: 1069 break; 1070 } 1071 switch (seq) { 1072 case IEEE80211_AUTH_SHARED_REQUEST: 1073 { 1074#ifdef IEEE80211_DEBUG 1075 bool allocbs; 1076#endif 1077 1078 if (ni == vap->iv_bss) { 1079 ni = ieee80211_dup_bss(vap, wh->i_addr2); 1080 if (ni == NULL) { 1081 /* NB: no way to return an error */ 1082 return; 1083 } 1084#ifdef IEEE80211_DEBUG 1085 allocbs = 1; 1086#endif 1087 } else { 1088 if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0) 1089 (void) ieee80211_ref_node(ni); 1090#ifdef IEEE80211_DEBUG 1091 allocbs = 0; 1092#endif 1093 } 1094 /* 1095 * Mark the node as referenced to reflect that it's 1096 * reference count has been bumped to insure it remains 1097 * after the transaction completes. 1098 */ 1099 ni->ni_flags |= IEEE80211_NODE_AREF; 1100 /* 1101 * Mark the node as requiring a valid association id 1102 * before outbound traffic is permitted. 1103 */ 1104 ni->ni_flags |= IEEE80211_NODE_ASSOCID; 1105 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1106 ni->ni_noise = nf; 1107 if (!ieee80211_alloc_challenge(ni)) { 1108 /* NB: don't return error so they rexmit */ 1109 return; 1110 } 1111 net80211_get_random_bytes(ni->ni_challenge, 1112 IEEE80211_CHALLENGE_LEN); 1113 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 1114 ni, "shared key %sauth request", allocbs ? "" : "re"); 1115 /* 1116 * When the ACL policy is set to RADIUS we defer the 1117 * authorization to a user agent. Dispatch an event, 1118 * a subsequent MLME call will decide the fate of the 1119 * station. If the user agent is not present then the 1120 * node will be reclaimed due to inactivity. 1121 */ 1122 if (vap->iv_acl != NULL && 1123 vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) { 1124 IEEE80211_NOTE_MAC(vap, 1125 IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, 1126 ni->ni_macaddr, 1127 "%s", "station authentication deferred (radius acl)"); 1128 ieee80211_notify_node_auth(ni); 1129 return; 1130 } 1131 break; 1132 } 1133 case IEEE80211_AUTH_SHARED_RESPONSE: 1134 if (ni == vap->iv_bss) { 1135 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1136 ni->ni_macaddr, "shared key response", 1137 "%s", "unknown station"); 1138 /* NB: don't send a response */ 1139 return; 1140 } 1141 if (ni->ni_challenge == NULL) { 1142 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1143 ni->ni_macaddr, "shared key response", 1144 "%s", "no challenge recorded"); 1145 vap->iv_stats.is_rx_bad_auth++; 1146 estatus = IEEE80211_STATUS_CHALLENGE; 1147 goto bad; 1148 } 1149 if (memcmp(ni->ni_challenge, &challenge[2], 1150 challenge[1]) != 0) { 1151 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1152 ni->ni_macaddr, "shared key response", 1153 "%s", "challenge mismatch"); 1154 vap->iv_stats.is_rx_auth_fail++; 1155 estatus = IEEE80211_STATUS_CHALLENGE; 1156 goto bad; 1157 } 1158 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 1159 ni, "%s", "station authenticated (shared key)"); 1160 ieee80211_node_authorize(ni); 1161 break; 1162 default: 1163 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1164 ni->ni_macaddr, "shared key auth", 1165 "bad seq %d", seq); 1166 vap->iv_stats.is_rx_bad_auth++; 1167 estatus = IEEE80211_STATUS_SEQUENCE; 1168 goto bad; 1169 } 1170 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 1171 return; 1172bad: 1173 /* 1174 * Send an error response; but only when operating as an AP. 1175 */ 1176 /* XXX hack to workaround calling convention */ 1177 ieee80211_send_error(ni, wh->i_addr2, 1178 IEEE80211_FC0_SUBTYPE_AUTH, 1179 (seq + 1) | (estatus<<16)); 1180} 1181 1182/* 1183 * Convert a WPA cipher selector OUI to an internal 1184 * cipher algorithm. Where appropriate we also 1185 * record any key length. 1186 */ 1187static int 1188wpa_cipher(const uint8_t *sel, uint8_t *keylen, uint8_t *cipher) 1189{ 1190#define WPA_SEL(x) (((x)<<24)|WPA_OUI) 1191 uint32_t w = le32dec(sel); 1192 1193 switch (w) { 1194 case WPA_SEL(WPA_CSE_NULL): 1195 *cipher = IEEE80211_CIPHER_NONE; 1196 break; 1197 case WPA_SEL(WPA_CSE_WEP40): 1198 if (keylen) 1199 *keylen = 40 / NBBY; 1200 *cipher = IEEE80211_CIPHER_WEP; 1201 break; 1202 case WPA_SEL(WPA_CSE_WEP104): 1203 if (keylen) 1204 *keylen = 104 / NBBY; 1205 *cipher = IEEE80211_CIPHER_WEP; 1206 break; 1207 case WPA_SEL(WPA_CSE_TKIP): 1208 *cipher = IEEE80211_CIPHER_TKIP; 1209 break; 1210 case WPA_SEL(WPA_CSE_CCMP): 1211 *cipher = IEEE80211_CIPHER_AES_CCM; 1212 break; 1213 default: 1214 return (EINVAL); 1215 } 1216 1217 return (0); 1218#undef WPA_SEL 1219} 1220 1221/* 1222 * Convert a WPA key management/authentication algorithm 1223 * to an internal code. 1224 */ 1225static int 1226wpa_keymgmt(const uint8_t *sel) 1227{ 1228#define WPA_SEL(x) (((x)<<24)|WPA_OUI) 1229 uint32_t w = le32dec(sel); 1230 1231 switch (w) { 1232 case WPA_SEL(WPA_ASE_8021X_UNSPEC): 1233 return WPA_ASE_8021X_UNSPEC; 1234 case WPA_SEL(WPA_ASE_8021X_PSK): 1235 return WPA_ASE_8021X_PSK; 1236 case WPA_SEL(WPA_ASE_NONE): 1237 return WPA_ASE_NONE; 1238 } 1239 return 0; /* NB: so is discarded */ 1240#undef WPA_SEL 1241} 1242 1243/* 1244 * Parse a WPA information element to collect parameters. 1245 * Note that we do not validate security parameters; that 1246 * is handled by the authenticator; the parsing done here 1247 * is just for internal use in making operational decisions. 1248 */ 1249static int 1250ieee80211_parse_wpa(struct ieee80211vap *vap, const uint8_t *frm, 1251 struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh) 1252{ 1253 uint8_t len = frm[1]; 1254 uint32_t w; 1255 int error, n; 1256 1257 /* 1258 * Check the length once for fixed parts: OUI, type, 1259 * version, mcast cipher, and 2 selector counts. 1260 * Other, variable-length data, must be checked separately. 1261 */ 1262 if ((vap->iv_flags & IEEE80211_F_WPA1) == 0) { 1263 IEEE80211_DISCARD_IE(vap, 1264 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1265 wh, "WPA", "not WPA, flags 0x%x", vap->iv_flags); 1266 return IEEE80211_REASON_IE_INVALID; 1267 } 1268 if (len < 14) { 1269 IEEE80211_DISCARD_IE(vap, 1270 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1271 wh, "WPA", "too short, len %u", len); 1272 return IEEE80211_REASON_IE_INVALID; 1273 } 1274 frm += 6, len -= 4; /* NB: len is payload only */ 1275 /* NB: iswpaoui already validated the OUI and type */ 1276 w = le16dec(frm); 1277 if (w != WPA_VERSION) { 1278 IEEE80211_DISCARD_IE(vap, 1279 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1280 wh, "WPA", "bad version %u", w); 1281 return IEEE80211_REASON_IE_INVALID; 1282 } 1283 frm += 2, len -= 2; 1284 1285 memset(rsn, 0, sizeof(*rsn)); 1286 1287 /* multicast/group cipher */ 1288 error = wpa_cipher(frm, &rsn->rsn_mcastkeylen, &rsn->rsn_mcastcipher); 1289 if (error != 0) { 1290 IEEE80211_DISCARD_IE(vap, 1291 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1292 wh, "WPA", "unknown mcast cipher suite %08X", 1293 le32dec(frm)); 1294 return IEEE80211_REASON_GROUP_CIPHER_INVALID; 1295 } 1296 frm += 4, len -= 4; 1297 1298 /* unicast ciphers */ 1299 n = le16dec(frm); 1300 frm += 2, len -= 2; 1301 if (len < n*4+2) { 1302 IEEE80211_DISCARD_IE(vap, 1303 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1304 wh, "WPA", "ucast cipher data too short; len %u, n %u", 1305 len, n); 1306 return IEEE80211_REASON_IE_INVALID; 1307 } 1308 w = 0; 1309 for (; n > 0; n--) { 1310 uint8_t cipher; 1311 1312 error = wpa_cipher(frm, &rsn->rsn_ucastkeylen, &cipher); 1313 if (error == 0) 1314 w |= 1 << cipher; 1315 1316 frm += 4, len -= 4; 1317 } 1318 if (w == 0) { 1319 IEEE80211_DISCARD_IE(vap, 1320 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1321 wh, "WPA", "no usable pairwise cipher suite found (w=%d)", 1322 w); 1323 return IEEE80211_REASON_PAIRWISE_CIPHER_INVALID; 1324 } 1325 /* XXX other? */ 1326 if (w & (1 << IEEE80211_CIPHER_AES_CCM)) 1327 rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM; 1328 else 1329 rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP; 1330 1331 /* key management algorithms */ 1332 n = le16dec(frm); 1333 frm += 2, len -= 2; 1334 if (len < n*4) { 1335 IEEE80211_DISCARD_IE(vap, 1336 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1337 wh, "WPA", "key mgmt alg data too short; len %u, n %u", 1338 len, n); 1339 return IEEE80211_REASON_IE_INVALID; 1340 } 1341 w = 0; 1342 for (; n > 0; n--) { 1343 w |= wpa_keymgmt(frm); 1344 frm += 4, len -= 4; 1345 } 1346 if (w & WPA_ASE_8021X_UNSPEC) 1347 rsn->rsn_keymgmt = WPA_ASE_8021X_UNSPEC; 1348 else 1349 rsn->rsn_keymgmt = WPA_ASE_8021X_PSK; 1350 1351 if (len > 2) /* optional capabilities */ 1352 rsn->rsn_caps = le16dec(frm); 1353 1354 return 0; 1355} 1356 1357/* 1358 * Convert an RSN cipher selector OUI to an internal 1359 * cipher algorithm. Where appropriate we also 1360 * record any key length. 1361 */ 1362static int 1363rsn_cipher(const uint8_t *sel, uint8_t *keylen, uint8_t *cipher) 1364{ 1365#define RSN_SEL(x) (((x)<<24)|RSN_OUI) 1366 uint32_t w = le32dec(sel); 1367 1368 switch (w) { 1369 case RSN_SEL(RSN_CSE_NULL): 1370 *cipher = IEEE80211_CIPHER_NONE; 1371 break; 1372 case RSN_SEL(RSN_CSE_WEP40): 1373 if (keylen) 1374 *keylen = 40 / NBBY; 1375 *cipher = IEEE80211_CIPHER_WEP; 1376 break; 1377 case RSN_SEL(RSN_CSE_WEP104): 1378 if (keylen) 1379 *keylen = 104 / NBBY; 1380 *cipher = IEEE80211_CIPHER_WEP; 1381 break; 1382 case RSN_SEL(RSN_CSE_TKIP): 1383 *cipher = IEEE80211_CIPHER_TKIP; 1384 break; 1385 case RSN_SEL(RSN_CSE_CCMP): 1386 *cipher = IEEE80211_CIPHER_AES_CCM; 1387 break; 1388 case RSN_SEL(RSN_CSE_WRAP): 1389 *cipher = IEEE80211_CIPHER_AES_OCB; 1390 break; 1391 default: 1392 return (EINVAL); 1393 } 1394 1395 return (0); 1396#undef WPA_SEL 1397} 1398 1399/* 1400 * Convert an RSN key management/authentication algorithm 1401 * to an internal code. 1402 */ 1403static int 1404rsn_keymgmt(const uint8_t *sel) 1405{ 1406#define RSN_SEL(x) (((x)<<24)|RSN_OUI) 1407 uint32_t w = le32dec(sel); 1408 1409 switch (w) { 1410 case RSN_SEL(RSN_ASE_8021X_UNSPEC): 1411 return RSN_ASE_8021X_UNSPEC; 1412 case RSN_SEL(RSN_ASE_8021X_PSK): 1413 return RSN_ASE_8021X_PSK; 1414 case RSN_SEL(RSN_ASE_NONE): 1415 return RSN_ASE_NONE; 1416 } 1417 return 0; /* NB: so is discarded */ 1418#undef RSN_SEL 1419} 1420 1421/* 1422 * Parse a WPA/RSN information element to collect parameters 1423 * and validate the parameters against what has been 1424 * configured for the system. 1425 */ 1426static int 1427ieee80211_parse_rsn(struct ieee80211vap *vap, const uint8_t *frm, 1428 struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh) 1429{ 1430 uint8_t len = frm[1]; 1431 uint32_t w; 1432 int error, n; 1433 1434 /* 1435 * Check the length once for fixed parts: 1436 * version, mcast cipher, and 2 selector counts. 1437 * Other, variable-length data, must be checked separately. 1438 */ 1439 if ((vap->iv_flags & IEEE80211_F_WPA2) == 0) { 1440 IEEE80211_DISCARD_IE(vap, 1441 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1442 wh, "WPA", "not RSN, flags 0x%x", vap->iv_flags); 1443 return IEEE80211_REASON_IE_INVALID; 1444 } 1445 /* XXX may be shorter */ 1446 if (len < 10) { 1447 IEEE80211_DISCARD_IE(vap, 1448 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1449 wh, "RSN", "too short, len %u", len); 1450 return IEEE80211_REASON_IE_INVALID; 1451 } 1452 frm += 2; 1453 w = le16dec(frm); 1454 if (w != RSN_VERSION) { 1455 IEEE80211_DISCARD_IE(vap, 1456 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1457 wh, "RSN", "bad version %u", w); 1458 return IEEE80211_REASON_UNSUPP_RSN_IE_VERSION; 1459 } 1460 frm += 2, len -= 2; 1461 1462 memset(rsn, 0, sizeof(*rsn)); 1463 1464 /* multicast/group cipher */ 1465 error = rsn_cipher(frm, &rsn->rsn_mcastkeylen, &rsn->rsn_mcastcipher); 1466 if (error != 0) { 1467 IEEE80211_DISCARD_IE(vap, 1468 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1469 wh, "RSN", "unknown mcast cipher suite %08X", 1470 le32dec(frm)); 1471 return IEEE80211_REASON_GROUP_CIPHER_INVALID; 1472 } 1473 if (rsn->rsn_mcastcipher == IEEE80211_CIPHER_NONE) { 1474 IEEE80211_DISCARD_IE(vap, 1475 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1476 wh, "RSN", "invalid mcast cipher suite %d", 1477 rsn->rsn_mcastcipher); 1478 return IEEE80211_REASON_GROUP_CIPHER_INVALID; 1479 } 1480 frm += 4, len -= 4; 1481 1482 /* unicast ciphers */ 1483 n = le16dec(frm); 1484 frm += 2, len -= 2; 1485 if (len < n*4+2) { 1486 IEEE80211_DISCARD_IE(vap, 1487 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1488 wh, "RSN", "ucast cipher data too short; len %u, n %u", 1489 len, n); 1490 return IEEE80211_REASON_IE_INVALID; 1491 } 1492 w = 0; 1493 1494 for (; n > 0; n--) { 1495 uint8_t cipher; 1496 1497 error = rsn_cipher(frm, &rsn->rsn_ucastkeylen, &cipher); 1498 if (error == 0) 1499 w |= 1 << cipher; 1500 1501 frm += 4, len -= 4; 1502 } 1503 if (w & (1 << IEEE80211_CIPHER_AES_CCM)) 1504 rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM; 1505 else if (w & (1 << IEEE80211_CIPHER_AES_OCB)) 1506 rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_OCB; 1507 else if (w & (1 << IEEE80211_CIPHER_TKIP)) 1508 rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP; 1509 else if ((w & (1 << IEEE80211_CIPHER_NONE)) && 1510 (rsn->rsn_mcastcipher == IEEE80211_CIPHER_WEP || 1511 rsn->rsn_mcastcipher == IEEE80211_CIPHER_TKIP)) 1512 rsn->rsn_ucastcipher = IEEE80211_CIPHER_NONE; 1513 else { 1514 IEEE80211_DISCARD_IE(vap, 1515 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1516 wh, "RSN", "no usable pairwise cipher suite found (w=%d)", 1517 w); 1518 return IEEE80211_REASON_PAIRWISE_CIPHER_INVALID; 1519 } 1520 1521 /* key management algorithms */ 1522 n = le16dec(frm); 1523 frm += 2, len -= 2; 1524 if (len < n*4) { 1525 IEEE80211_DISCARD_IE(vap, 1526 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA, 1527 wh, "RSN", "key mgmt alg data too short; len %u, n %u", 1528 len, n); 1529 return IEEE80211_REASON_IE_INVALID; 1530 } 1531 w = 0; 1532 for (; n > 0; n--) { 1533 w |= rsn_keymgmt(frm); 1534 frm += 4, len -= 4; 1535 } 1536 if (w & RSN_ASE_8021X_UNSPEC) 1537 rsn->rsn_keymgmt = RSN_ASE_8021X_UNSPEC; 1538 else 1539 rsn->rsn_keymgmt = RSN_ASE_8021X_PSK; 1540 1541 /* optional RSN capabilities */ 1542 if (len > 2) 1543 rsn->rsn_caps = le16dec(frm); 1544 /* XXXPMKID */ 1545 1546 return 0; 1547} 1548 1549/* 1550 * WPA/802.11i association request processing. 1551 */ 1552static int 1553wpa_assocreq(struct ieee80211_node *ni, struct ieee80211_rsnparms *rsnparms, 1554 const struct ieee80211_frame *wh, const uint8_t *wpa, 1555 const uint8_t *rsn, uint16_t capinfo) 1556{ 1557 struct ieee80211vap *vap = ni->ni_vap; 1558 uint8_t reason; 1559 int badwparsn; 1560 1561 ni->ni_flags &= ~(IEEE80211_NODE_WPS|IEEE80211_NODE_TSN); 1562 if (wpa == NULL && rsn == NULL) { 1563 if (vap->iv_flags_ext & IEEE80211_FEXT_WPS) { 1564 /* 1565 * W-Fi Protected Setup (WPS) permits 1566 * clients to associate and pass EAPOL frames 1567 * to establish initial credentials. 1568 */ 1569 ni->ni_flags |= IEEE80211_NODE_WPS; 1570 return 1; 1571 } 1572 if ((vap->iv_flags_ext & IEEE80211_FEXT_TSN) && 1573 (capinfo & IEEE80211_CAPINFO_PRIVACY)) { 1574 /* 1575 * Transitional Security Network. Permits clients 1576 * to associate and use WEP while WPA is configured. 1577 */ 1578 ni->ni_flags |= IEEE80211_NODE_TSN; 1579 return 1; 1580 } 1581 IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, 1582 wh, NULL, "%s", "no WPA/RSN IE in association request"); 1583 vap->iv_stats.is_rx_assoc_badwpaie++; 1584 reason = IEEE80211_REASON_IE_INVALID; 1585 goto bad; 1586 } 1587 /* assert right association security credentials */ 1588 badwparsn = 0; /* NB: to silence compiler */ 1589 switch (vap->iv_flags & IEEE80211_F_WPA) { 1590 case IEEE80211_F_WPA1: 1591 badwparsn = (wpa == NULL); 1592 break; 1593 case IEEE80211_F_WPA2: 1594 badwparsn = (rsn == NULL); 1595 break; 1596 case IEEE80211_F_WPA1|IEEE80211_F_WPA2: 1597 badwparsn = (wpa == NULL && rsn == NULL); 1598 break; 1599 } 1600 if (badwparsn) { 1601 IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, 1602 wh, NULL, 1603 "%s", "missing WPA/RSN IE in association request"); 1604 vap->iv_stats.is_rx_assoc_badwpaie++; 1605 reason = IEEE80211_REASON_IE_INVALID; 1606 goto bad; 1607 } 1608 /* 1609 * Parse WPA/RSN information element. 1610 */ 1611 if (wpa != NULL) 1612 reason = ieee80211_parse_wpa(vap, wpa, rsnparms, wh); 1613 else 1614 reason = ieee80211_parse_rsn(vap, rsn, rsnparms, wh); 1615 if (reason != 0) { 1616 /* XXX wpa->rsn fallback? */ 1617 /* XXX distinguish WPA/RSN? */ 1618 vap->iv_stats.is_rx_assoc_badwpaie++; 1619 goto bad; 1620 } 1621 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, ni, 1622 "%s ie: mc %u/%u uc %u/%u key %u caps 0x%x", 1623 wpa != NULL ? "WPA" : "RSN", 1624 rsnparms->rsn_mcastcipher, rsnparms->rsn_mcastkeylen, 1625 rsnparms->rsn_ucastcipher, rsnparms->rsn_ucastkeylen, 1626 rsnparms->rsn_keymgmt, rsnparms->rsn_caps); 1627 1628 return 1; 1629bad: 1630 ieee80211_node_deauth(ni, reason); 1631 return 0; 1632} 1633 1634/* XXX find a better place for definition */ 1635struct l2_update_frame { 1636 struct ether_header eh; 1637 uint8_t dsap; 1638 uint8_t ssap; 1639 uint8_t control; 1640 uint8_t xid[3]; 1641} __packed; 1642 1643/* 1644 * Deliver a TGf L2UF frame on behalf of a station. 1645 * This primes any bridge when the station is roaming 1646 * between ap's on the same wired network. 1647 */ 1648static void 1649ieee80211_deliver_l2uf(struct ieee80211_node *ni) 1650{ 1651 struct ieee80211vap *vap = ni->ni_vap; 1652 struct ifnet *ifp = vap->iv_ifp; 1653 struct mbuf *m; 1654 struct l2_update_frame *l2uf; 1655 struct ether_header *eh; 1656 1657 m = m_gethdr(IEEE80211_M_NOWAIT, MT_DATA); 1658 if (m == NULL) { 1659 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 1660 "%s", "no mbuf for l2uf frame"); 1661 vap->iv_stats.is_rx_nobuf++; /* XXX not right */ 1662 return; 1663 } 1664 l2uf = mtod(m, struct l2_update_frame *); 1665 eh = &l2uf->eh; 1666 /* dst: Broadcast address */ 1667 IEEE80211_ADDR_COPY(eh->ether_dhost, ifp->if_broadcastaddr); 1668 /* src: associated STA */ 1669 IEEE80211_ADDR_COPY(eh->ether_shost, ni->ni_macaddr); 1670 eh->ether_type = htons(sizeof(*l2uf) - sizeof(*eh)); 1671 1672 l2uf->dsap = 0; 1673 l2uf->ssap = 0; 1674 l2uf->control = 0xf5; 1675 l2uf->xid[0] = 0x81; 1676 l2uf->xid[1] = 0x80; 1677 l2uf->xid[2] = 0x00; 1678 1679 m->m_pkthdr.len = m->m_len = sizeof(*l2uf); 1680 hostap_deliver_data(vap, ni, m); 1681} 1682 1683static void 1684ratesetmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1685 int reassoc, int resp, const char *tag, int rate) 1686{ 1687 IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2, 1688 "deny %s request, %s rate set mismatch, rate/MCS %d", 1689 reassoc ? "reassoc" : "assoc", tag, rate & IEEE80211_RATE_VAL); 1690 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_BASIC_RATE); 1691 ieee80211_node_leave(ni); 1692} 1693 1694static void 1695capinfomismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1696 int reassoc, int resp, const char *tag, int capinfo) 1697{ 1698 struct ieee80211vap *vap = ni->ni_vap; 1699 1700 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2, 1701 "deny %s request, %s mismatch 0x%x", 1702 reassoc ? "reassoc" : "assoc", tag, capinfo); 1703 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_CAPINFO); 1704 ieee80211_node_leave(ni); 1705 vap->iv_stats.is_rx_assoc_capmismatch++; 1706} 1707 1708static void 1709htcapmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1710 int reassoc, int resp) 1711{ 1712 IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2, 1713 "deny %s request, %s missing HT ie", reassoc ? "reassoc" : "assoc"); 1714 /* XXX no better code */ 1715 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_MISSING_HT_CAPS); 1716 ieee80211_node_leave(ni); 1717} 1718 1719static void 1720authalgreject(struct ieee80211_node *ni, const struct ieee80211_frame *wh, 1721 int algo, int seq, int status) 1722{ 1723 struct ieee80211vap *vap = ni->ni_vap; 1724 1725 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1726 wh, NULL, "unsupported alg %d", algo); 1727 vap->iv_stats.is_rx_auth_unsupported++; 1728 ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_AUTH, 1729 seq | (status << 16)); 1730} 1731 1732static __inline int 1733ishtmixed(const uint8_t *ie) 1734{ 1735 const struct ieee80211_ie_htinfo *ht = 1736 (const struct ieee80211_ie_htinfo *) ie; 1737 return (ht->hi_byte2 & IEEE80211_HTINFO_OPMODE) == 1738 IEEE80211_HTINFO_OPMODE_MIXED; 1739} 1740 1741static int 1742is11bclient(const uint8_t *rates, const uint8_t *xrates) 1743{ 1744 static const uint32_t brates = (1<<2*1)|(1<<2*2)|(1<<11)|(1<<2*11); 1745 int i; 1746 1747 /* NB: the 11b clients we care about will not have xrates */ 1748 if (xrates != NULL || rates == NULL) 1749 return 0; 1750 for (i = 0; i < rates[1]; i++) { 1751 int r = rates[2+i] & IEEE80211_RATE_VAL; 1752 if (r > 2*11 || ((1<<r) & brates) == 0) 1753 return 0; 1754 } 1755 return 1; 1756} 1757 1758static void 1759hostap_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, 1760 int subtype, const struct ieee80211_rx_stats *rxs, int rssi, int nf) 1761{ 1762 struct ieee80211vap *vap = ni->ni_vap; 1763 struct ieee80211com *ic = ni->ni_ic; 1764 struct ieee80211_frame *wh; 1765 uint8_t *frm, *efrm, *sfrm; 1766 uint8_t *ssid, *rates, *xrates, *wpa, *rsn, *wme, *ath, *htcap; 1767 uint8_t *vhtcap, *vhtinfo; 1768 int reassoc, resp; 1769 uint8_t rate; 1770 1771 wh = mtod(m0, struct ieee80211_frame *); 1772 frm = (uint8_t *)&wh[1]; 1773 efrm = mtod(m0, uint8_t *) + m0->m_len; 1774 switch (subtype) { 1775 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1776 /* 1777 * We process beacon/probe response frames when scanning; 1778 * otherwise we check beacon frames for overlapping non-ERP 1779 * BSS in 11g and/or overlapping legacy BSS when in HT. 1780 */ 1781 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1782 vap->iv_stats.is_rx_mgtdiscard++; 1783 return; 1784 } 1785 /* FALLTHROUGH */ 1786 case IEEE80211_FC0_SUBTYPE_BEACON: { 1787 struct ieee80211_scanparams scan; 1788 1789 /* NB: accept off-channel frames */ 1790 /* XXX TODO: use rxstatus to determine off-channel details */ 1791 if (ieee80211_parse_beacon(ni, m0, ic->ic_curchan, &scan) &~ IEEE80211_BPARSE_OFFCHAN) 1792 return; 1793 /* 1794 * Count frame now that we know it's to be processed. 1795 */ 1796 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1797 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1798 IEEE80211_NODE_STAT(ni, rx_beacons); 1799 } else 1800 IEEE80211_NODE_STAT(ni, rx_proberesp); 1801 /* 1802 * If scanning, just pass information to the scan module. 1803 */ 1804 if (ic->ic_flags & IEEE80211_F_SCAN) { 1805 if (scan.status == 0 && /* NB: on channel */ 1806 (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN)) { 1807 /* 1808 * Actively scanning a channel marked passive; 1809 * send a probe request now that we know there 1810 * is 802.11 traffic present. 1811 * 1812 * XXX check if the beacon we recv'd gives 1813 * us what we need and suppress the probe req 1814 */ 1815 ieee80211_probe_curchan(vap, 1); 1816 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1817 } 1818 ieee80211_add_scan(vap, ic->ic_curchan, &scan, wh, 1819 subtype, rssi, nf); 1820 return; 1821 } 1822 /* 1823 * Check beacon for overlapping bss w/ non ERP stations. 1824 * If we detect one and protection is configured but not 1825 * enabled, enable it and start a timer that'll bring us 1826 * out if we stop seeing the bss. 1827 */ 1828 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1829 scan.status == 0 && /* NB: on-channel */ 1830 ((scan.erp & 0x100) == 0 || /* NB: no ERP, 11b sta*/ 1831 (scan.erp & IEEE80211_ERP_NON_ERP_PRESENT))) { 1832 vap->iv_lastnonerp = ticks; 1833 vap->iv_flags_ext |= IEEE80211_FEXT_NONERP_PR; 1834 /* 1835 * XXX TODO: this may need to check all VAPs? 1836 */ 1837 if (vap->iv_protmode != IEEE80211_PROT_NONE && 1838 (vap->iv_flags & IEEE80211_F_USEPROT) == 0) { 1839 IEEE80211_NOTE_FRAME(vap, 1840 IEEE80211_MSG_ASSOC, wh, 1841 "non-ERP present on channel %d " 1842 "(saw erp 0x%x from channel %d), " 1843 "enable use of protection", 1844 ic->ic_curchan->ic_ieee, 1845 scan.erp, scan.chan); 1846 vap->iv_flags |= IEEE80211_F_USEPROT; 1847 ieee80211_vap_update_erp_protmode(vap); 1848 } 1849 } 1850 /* 1851 * Check beacon for non-HT station on HT channel 1852 * and update HT BSS occupancy as appropriate. 1853 */ 1854 if (IEEE80211_IS_CHAN_HT(ic->ic_curchan)) { 1855 if (scan.status & IEEE80211_BPARSE_OFFCHAN) { 1856 /* 1857 * Off control channel; only check frames 1858 * that come in the extension channel when 1859 * operating w/ HT40. 1860 */ 1861 if (!IEEE80211_IS_CHAN_HT40(ic->ic_curchan)) 1862 break; 1863 if (scan.chan != ic->ic_curchan->ic_extieee) 1864 break; 1865 } 1866 if (scan.htinfo == NULL) { 1867 ieee80211_htprot_update(vap, 1868 IEEE80211_HTINFO_OPMODE_PROTOPT | 1869 IEEE80211_HTINFO_NONHT_PRESENT); 1870 } else if (ishtmixed(scan.htinfo)) { 1871 /* XXX? take NONHT_PRESENT from beacon? */ 1872 ieee80211_htprot_update(vap, 1873 IEEE80211_HTINFO_OPMODE_MIXED | 1874 IEEE80211_HTINFO_NONHT_PRESENT); 1875 } 1876 } 1877 break; 1878 } 1879 1880 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1881 if (vap->iv_state != IEEE80211_S_RUN) { 1882 vap->iv_stats.is_rx_mgtdiscard++; 1883 return; 1884 } 1885 /* 1886 * Consult the ACL policy module if setup. 1887 */ 1888 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1889 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1890 wh, NULL, "%s", "disallowed by ACL"); 1891 vap->iv_stats.is_rx_acl++; 1892 return; 1893 } 1894 /* 1895 * prreq frame format 1896 * [tlv] ssid 1897 * [tlv] supported rates 1898 * [tlv] extended supported rates 1899 */ 1900 ssid = rates = xrates = NULL; 1901 while (efrm - frm > 1) { 1902 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1903 switch (*frm) { 1904 case IEEE80211_ELEMID_SSID: 1905 ssid = frm; 1906 break; 1907 case IEEE80211_ELEMID_RATES: 1908 rates = frm; 1909 break; 1910 case IEEE80211_ELEMID_XRATES: 1911 xrates = frm; 1912 break; 1913 } 1914 frm += frm[1] + 2; 1915 } 1916 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1917 if (xrates != NULL) 1918 IEEE80211_VERIFY_ELEMENT(xrates, 1919 IEEE80211_RATE_MAXSIZE - rates[1], return); 1920 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 1921 IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return); 1922 if ((vap->iv_flags & IEEE80211_F_HIDESSID) && ssid[1] == 0) { 1923 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1924 wh, NULL, 1925 "%s", "no ssid with ssid suppression enabled"); 1926 vap->iv_stats.is_rx_ssidmismatch++; /*XXX*/ 1927 return; 1928 } 1929 1930 /* XXX find a better class or define it's own */ 1931 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 1932 "%s", "recv probe req"); 1933 /* 1934 * Some legacy 11b clients cannot hack a complete 1935 * probe response frame. When the request includes 1936 * only a bare-bones rate set, communicate this to 1937 * the transmit side. 1938 */ 1939 ieee80211_send_proberesp(vap, wh->i_addr2, 1940 is11bclient(rates, xrates) ? IEEE80211_SEND_LEGACY_11B : 0); 1941 break; 1942 1943 case IEEE80211_FC0_SUBTYPE_AUTH: { 1944 uint16_t algo, seq, status; 1945 1946 if (vap->iv_state != IEEE80211_S_RUN) { 1947 vap->iv_stats.is_rx_mgtdiscard++; 1948 return; 1949 } 1950 if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) { 1951 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1952 wh, NULL, "%s", "wrong bssid"); 1953 vap->iv_stats.is_rx_wrongbss++; /*XXX unique stat?*/ 1954 return; 1955 } 1956 /* 1957 * auth frame format 1958 * [2] algorithm 1959 * [2] sequence 1960 * [2] status 1961 * [tlv*] challenge 1962 */ 1963 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1964 algo = le16toh(*(uint16_t *)frm); 1965 seq = le16toh(*(uint16_t *)(frm + 2)); 1966 status = le16toh(*(uint16_t *)(frm + 4)); 1967 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2, 1968 "recv auth frame with algorithm %d seq %d", algo, seq); 1969 /* 1970 * Consult the ACL policy module if setup. 1971 */ 1972 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1973 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1974 wh, NULL, "%s", "disallowed by ACL"); 1975 vap->iv_stats.is_rx_acl++; 1976 ieee80211_send_error(ni, wh->i_addr2, 1977 IEEE80211_FC0_SUBTYPE_AUTH, 1978 (seq+1) | (IEEE80211_STATUS_UNSPECIFIED<<16)); 1979 return; 1980 } 1981 if (vap->iv_flags & IEEE80211_F_COUNTERM) { 1982 IEEE80211_DISCARD(vap, 1983 IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO, 1984 wh, NULL, "%s", "TKIP countermeasures enabled"); 1985 vap->iv_stats.is_rx_auth_countermeasures++; 1986 ieee80211_send_error(ni, wh->i_addr2, 1987 IEEE80211_FC0_SUBTYPE_AUTH, 1988 IEEE80211_REASON_MIC_FAILURE); 1989 return; 1990 } 1991 if (algo == IEEE80211_AUTH_ALG_SHARED) 1992 hostap_auth_shared(ni, wh, frm + 6, efrm, rssi, nf, 1993 seq, status); 1994 else if (algo == IEEE80211_AUTH_ALG_OPEN) 1995 hostap_auth_open(ni, wh, rssi, nf, seq, status); 1996 else if (algo == IEEE80211_AUTH_ALG_LEAP) { 1997 authalgreject(ni, wh, algo, 1998 seq+1, IEEE80211_STATUS_ALG); 1999 return; 2000 } else { 2001 /* 2002 * We assume that an unknown algorithm is the result 2003 * of a decryption failure on a shared key auth frame; 2004 * return a status code appropriate for that instead 2005 * of IEEE80211_STATUS_ALG. 2006 * 2007 * NB: a seq# of 4 is intentional; the decrypted 2008 * frame likely has a bogus seq value. 2009 */ 2010 authalgreject(ni, wh, algo, 2011 4, IEEE80211_STATUS_CHALLENGE); 2012 return; 2013 } 2014 break; 2015 } 2016 2017 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2018 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: { 2019 uint16_t capinfo, lintval; 2020 struct ieee80211_rsnparms rsnparms; 2021 2022 if (vap->iv_state != IEEE80211_S_RUN) { 2023 vap->iv_stats.is_rx_mgtdiscard++; 2024 return; 2025 } 2026 if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) { 2027 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2028 wh, NULL, "%s", "wrong bssid"); 2029 vap->iv_stats.is_rx_assoc_bss++; 2030 return; 2031 } 2032 if (subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) { 2033 reassoc = 1; 2034 resp = IEEE80211_FC0_SUBTYPE_REASSOC_RESP; 2035 } else { 2036 reassoc = 0; 2037 resp = IEEE80211_FC0_SUBTYPE_ASSOC_RESP; 2038 } 2039 if (ni == vap->iv_bss) { 2040 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2, 2041 "deny %s request, sta not authenticated", 2042 reassoc ? "reassoc" : "assoc"); 2043 ieee80211_send_error(ni, wh->i_addr2, 2044 IEEE80211_FC0_SUBTYPE_DEAUTH, 2045 IEEE80211_REASON_ASSOC_NOT_AUTHED); 2046 vap->iv_stats.is_rx_assoc_notauth++; 2047 return; 2048 } 2049 2050 /* 2051 * asreq frame format 2052 * [2] capability information 2053 * [2] listen interval 2054 * [6*] current AP address (reassoc only) 2055 * [tlv] ssid 2056 * [tlv] supported rates 2057 * [tlv] extended supported rates 2058 * [tlv] WPA or RSN 2059 * [tlv] HT capabilities 2060 * [tlv] Atheros capabilities 2061 */ 2062 IEEE80211_VERIFY_LENGTH(efrm - frm, (reassoc ? 10 : 4), return); 2063 capinfo = le16toh(*(uint16_t *)frm); frm += 2; 2064 lintval = le16toh(*(uint16_t *)frm); frm += 2; 2065 if (reassoc) 2066 frm += 6; /* ignore current AP info */ 2067 ssid = rates = xrates = wpa = rsn = wme = ath = htcap = NULL; 2068 vhtcap = vhtinfo = NULL; 2069 sfrm = frm; 2070 while (efrm - frm > 1) { 2071 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 2072 switch (*frm) { 2073 case IEEE80211_ELEMID_SSID: 2074 ssid = frm; 2075 break; 2076 case IEEE80211_ELEMID_RATES: 2077 rates = frm; 2078 break; 2079 case IEEE80211_ELEMID_XRATES: 2080 xrates = frm; 2081 break; 2082 case IEEE80211_ELEMID_RSN: 2083 rsn = frm; 2084 break; 2085 case IEEE80211_ELEMID_HTCAP: 2086 htcap = frm; 2087 break; 2088 case IEEE80211_ELEMID_VHT_CAP: 2089 vhtcap = frm; 2090 break; 2091 case IEEE80211_ELEMID_VHT_OPMODE: 2092 vhtinfo = frm; 2093 break; 2094 case IEEE80211_ELEMID_VENDOR: 2095 if (iswpaoui(frm)) 2096 wpa = frm; 2097 else if (iswmeinfo(frm)) 2098 wme = frm; 2099#ifdef IEEE80211_SUPPORT_SUPERG 2100 else if (isatherosoui(frm)) 2101 ath = frm; 2102#endif 2103 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) { 2104 if (ishtcapoui(frm) && htcap == NULL) 2105 htcap = frm; 2106 } 2107 break; 2108 } 2109 frm += frm[1] + 2; 2110 } 2111 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 2112 if (xrates != NULL) 2113 IEEE80211_VERIFY_ELEMENT(xrates, 2114 IEEE80211_RATE_MAXSIZE - rates[1], return); 2115 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 2116 IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return); 2117 if (htcap != NULL) { 2118 IEEE80211_VERIFY_LENGTH(htcap[1], 2119 htcap[0] == IEEE80211_ELEMID_VENDOR ? 2120 4 + sizeof(struct ieee80211_ie_htcap)-2 : 2121 sizeof(struct ieee80211_ie_htcap)-2, 2122 return); /* XXX just NULL out? */ 2123 } 2124 2125 /* Validate VHT IEs */ 2126 if (vhtcap != NULL) { 2127 IEEE80211_VERIFY_LENGTH(vhtcap[1], 2128 sizeof(struct ieee80211_vht_cap), 2129 return); 2130 } 2131 if (vhtinfo != NULL) { 2132 IEEE80211_VERIFY_LENGTH(vhtinfo[1], 2133 sizeof(struct ieee80211_vht_operation), 2134 return); 2135 } 2136 2137 if ((vap->iv_flags & IEEE80211_F_WPA) && 2138 !wpa_assocreq(ni, &rsnparms, wh, wpa, rsn, capinfo)) 2139 return; 2140 /* discard challenge after association */ 2141 if (ni->ni_challenge != NULL) { 2142 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 2143 ni->ni_challenge = NULL; 2144 } 2145 /* NB: 802.11 spec says to ignore station's privacy bit */ 2146 if ((capinfo & IEEE80211_CAPINFO_ESS) == 0) { 2147 capinfomismatch(ni, wh, reassoc, resp, 2148 "capability", capinfo); 2149 return; 2150 } 2151 /* 2152 * Disallow re-associate w/ invalid slot time setting. 2153 */ 2154 if (ni->ni_associd != 0 && 2155 IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) && 2156 ((ni->ni_capinfo ^ capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME)) { 2157 capinfomismatch(ni, wh, reassoc, resp, 2158 "slot time", capinfo); 2159 return; 2160 } 2161 rate = ieee80211_setup_rates(ni, rates, xrates, 2162 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 2163 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 2164 if (rate & IEEE80211_RATE_BASIC) { 2165 ratesetmismatch(ni, wh, reassoc, resp, "legacy", rate); 2166 vap->iv_stats.is_rx_assoc_norate++; 2167 return; 2168 } 2169 /* 2170 * If constrained to 11g-only stations reject an 2171 * 11b-only station. We cheat a bit here by looking 2172 * at the max negotiated xmit rate and assuming anyone 2173 * with a best rate <24Mb/s is an 11b station. 2174 */ 2175 if ((vap->iv_flags & IEEE80211_F_PUREG) && rate < 48) { 2176 ratesetmismatch(ni, wh, reassoc, resp, "11g", rate); 2177 vap->iv_stats.is_rx_assoc_norate++; 2178 return; 2179 } 2180 2181 /* 2182 * Do HT rate set handling and setup HT node state. 2183 */ 2184 ni->ni_chan = vap->iv_bss->ni_chan; 2185 2186 /* VHT */ 2187 if (IEEE80211_IS_CHAN_VHT(ni->ni_chan) && 2188 vhtcap != NULL && 2189 vhtinfo != NULL) { 2190 /* XXX TODO; see below */ 2191 printf("%s: VHT TODO!\n", __func__); 2192 ieee80211_vht_node_init(ni); 2193 ieee80211_vht_update_cap(ni, vhtcap, vhtinfo); 2194 } else if (ni->ni_flags & IEEE80211_NODE_VHT) 2195 ieee80211_vht_node_cleanup(ni); 2196 2197 /* HT */ 2198 if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && htcap != NULL) { 2199 rate = ieee80211_setup_htrates(ni, htcap, 2200 IEEE80211_F_DOFMCS | IEEE80211_F_DONEGO | 2201 IEEE80211_F_DOBRS); 2202 if (rate & IEEE80211_RATE_BASIC) { 2203 ratesetmismatch(ni, wh, reassoc, resp, 2204 "HT", rate); 2205 vap->iv_stats.is_ht_assoc_norate++; 2206 return; 2207 } 2208 ieee80211_ht_node_init(ni); 2209 ieee80211_ht_updatehtcap(ni, htcap); 2210 } else if (ni->ni_flags & IEEE80211_NODE_HT) 2211 ieee80211_ht_node_cleanup(ni); 2212 2213 /* Finally - this will use HT/VHT info to change node channel */ 2214 if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && htcap != NULL) { 2215 ieee80211_ht_updatehtcap_final(ni); 2216 } 2217 2218#ifdef IEEE80211_SUPPORT_SUPERG 2219 /* Always do ff node cleanup; for A-MSDU */ 2220 ieee80211_ff_node_cleanup(ni); 2221#endif 2222 /* 2223 * Allow AMPDU operation only with unencrypted traffic 2224 * or AES-CCM; the 11n spec only specifies these ciphers 2225 * so permitting any others is undefined and can lead 2226 * to interoperability problems. 2227 */ 2228 if ((ni->ni_flags & IEEE80211_NODE_HT) && 2229 (((vap->iv_flags & IEEE80211_F_WPA) && 2230 rsnparms.rsn_ucastcipher != IEEE80211_CIPHER_AES_CCM) || 2231 (vap->iv_flags & (IEEE80211_F_WPA|IEEE80211_F_PRIVACY)) == IEEE80211_F_PRIVACY)) { 2232 IEEE80211_NOTE(vap, 2233 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 2234 "disallow HT use because WEP or TKIP requested, " 2235 "capinfo 0x%x ucastcipher %d", capinfo, 2236 rsnparms.rsn_ucastcipher); 2237 ieee80211_ht_node_cleanup(ni); 2238#ifdef IEEE80211_SUPPORT_SUPERG 2239 /* Always do ff node cleanup; for A-MSDU */ 2240 ieee80211_ff_node_cleanup(ni); 2241#endif 2242 vap->iv_stats.is_ht_assoc_downgrade++; 2243 } 2244 /* 2245 * If constrained to 11n-only stations reject legacy stations. 2246 */ 2247 if ((vap->iv_flags_ht & IEEE80211_FHT_PUREN) && 2248 (ni->ni_flags & IEEE80211_NODE_HT) == 0) { 2249 htcapmismatch(ni, wh, reassoc, resp); 2250 vap->iv_stats.is_ht_assoc_nohtcap++; 2251 return; 2252 } 2253 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 2254 ni->ni_noise = nf; 2255 ni->ni_intval = lintval; 2256 ni->ni_capinfo = capinfo; 2257 ni->ni_fhdwell = vap->iv_bss->ni_fhdwell; 2258 ni->ni_fhindex = vap->iv_bss->ni_fhindex; 2259 /* 2260 * Store the IEs. 2261 * XXX maybe better to just expand 2262 */ 2263 if (ieee80211_ies_init(&ni->ni_ies, sfrm, efrm - sfrm)) { 2264#define setie(_ie, _off) ieee80211_ies_setie(ni->ni_ies, _ie, _off) 2265 if (wpa != NULL) 2266 setie(wpa_ie, wpa - sfrm); 2267 if (rsn != NULL) 2268 setie(rsn_ie, rsn - sfrm); 2269 if (htcap != NULL) 2270 setie(htcap_ie, htcap - sfrm); 2271 if (wme != NULL) { 2272 setie(wme_ie, wme - sfrm); 2273 /* 2274 * Mark node as capable of QoS. 2275 */ 2276 ni->ni_flags |= IEEE80211_NODE_QOS; 2277 if (ieee80211_parse_wmeie(wme, wh, ni) > 0) { 2278 if (ni->ni_uapsd != 0) 2279 ni->ni_flags |= 2280 IEEE80211_NODE_UAPSD; 2281 else 2282 ni->ni_flags &= 2283 ~IEEE80211_NODE_UAPSD; 2284 } 2285 } else 2286 ni->ni_flags &= 2287 ~(IEEE80211_NODE_QOS | 2288 IEEE80211_NODE_UAPSD); 2289#ifdef IEEE80211_SUPPORT_SUPERG 2290 if (ath != NULL) { 2291 setie(ath_ie, ath - sfrm); 2292 /* 2293 * Parse ATH station parameters. 2294 */ 2295 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie); 2296 } else 2297#endif 2298 ni->ni_ath_flags = 0; 2299#undef setie 2300 } else { 2301 ni->ni_flags &= ~IEEE80211_NODE_QOS; 2302 ni->ni_flags &= ~IEEE80211_NODE_UAPSD; 2303 ni->ni_ath_flags = 0; 2304 } 2305 ieee80211_node_join(ni, resp); 2306 ieee80211_deliver_l2uf(ni); 2307 break; 2308 } 2309 2310 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2311 case IEEE80211_FC0_SUBTYPE_DISASSOC: { 2312#ifdef IEEE80211_DEBUG 2313 uint16_t reason; 2314#endif 2315 2316 if (vap->iv_state != IEEE80211_S_RUN || 2317 /* NB: can happen when in promiscuous mode */ 2318 !IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 2319 vap->iv_stats.is_rx_mgtdiscard++; 2320 break; 2321 } 2322 /* 2323 * deauth/disassoc frame format 2324 * [2] reason 2325 */ 2326 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 2327#ifdef IEEE80211_DEBUG 2328 reason = le16toh(*(uint16_t *)frm); 2329#endif 2330 if (subtype == IEEE80211_FC0_SUBTYPE_DEAUTH) { 2331 vap->iv_stats.is_rx_deauth++; 2332 IEEE80211_NODE_STAT(ni, rx_deauth); 2333 } else { 2334 vap->iv_stats.is_rx_disassoc++; 2335 IEEE80211_NODE_STAT(ni, rx_disassoc); 2336 } 2337 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 2338 "recv %s (reason: %d (%s))", 2339 ieee80211_mgt_subtype_name(subtype), 2340 reason, ieee80211_reason_to_string(reason)); 2341 if (ni != vap->iv_bss) 2342 ieee80211_node_leave(ni); 2343 break; 2344 } 2345 2346 case IEEE80211_FC0_SUBTYPE_ACTION: 2347 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 2348 if (ni == vap->iv_bss) { 2349 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2350 wh, NULL, "%s", "unknown node"); 2351 vap->iv_stats.is_rx_mgtdiscard++; 2352 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 2353 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2354 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2355 wh, NULL, "%s", "not for us"); 2356 vap->iv_stats.is_rx_mgtdiscard++; 2357 } else if (vap->iv_state != IEEE80211_S_RUN) { 2358 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2359 wh, NULL, "wrong state %s", 2360 ieee80211_state_name[vap->iv_state]); 2361 vap->iv_stats.is_rx_mgtdiscard++; 2362 } else { 2363 if (ieee80211_parse_action(ni, m0) == 0) 2364 (void)ic->ic_recv_action(ni, wh, frm, efrm); 2365 } 2366 break; 2367 2368 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2369 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2370 case IEEE80211_FC0_SUBTYPE_TIMING_ADV: 2371 case IEEE80211_FC0_SUBTYPE_ATIM: 2372 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2373 wh, NULL, "%s", "not handled"); 2374 vap->iv_stats.is_rx_mgtdiscard++; 2375 break; 2376 2377 default: 2378 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2379 wh, "mgt", "subtype 0x%x not handled", subtype); 2380 vap->iv_stats.is_rx_badsubtype++; 2381 break; 2382 } 2383} 2384 2385static void 2386hostap_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 2387{ 2388 switch (subtype) { 2389 case IEEE80211_FC0_SUBTYPE_PS_POLL: 2390 ni->ni_vap->iv_recv_pspoll(ni, m); 2391 break; 2392 case IEEE80211_FC0_SUBTYPE_BAR: 2393 ieee80211_recv_bar(ni, m); 2394 break; 2395 } 2396} 2397 2398/* 2399 * Process a received ps-poll frame. 2400 */ 2401void 2402ieee80211_recv_pspoll(struct ieee80211_node *ni, struct mbuf *m0) 2403{ 2404 struct ieee80211vap *vap = ni->ni_vap; 2405 struct ieee80211com *ic = vap->iv_ic; 2406 struct ieee80211_frame_min *wh; 2407 struct mbuf *m; 2408 uint16_t aid; 2409 int qlen; 2410 2411 wh = mtod(m0, struct ieee80211_frame_min *); 2412 if (ni->ni_associd == 0) { 2413 IEEE80211_DISCARD(vap, 2414 IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG, 2415 (struct ieee80211_frame *) wh, NULL, 2416 "%s", "unassociated station"); 2417 vap->iv_stats.is_ps_unassoc++; 2418 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH, 2419 IEEE80211_REASON_NOT_ASSOCED); 2420 return; 2421 } 2422 2423 aid = le16toh(*(uint16_t *)wh->i_dur); 2424 if (aid != ni->ni_associd) { 2425 IEEE80211_DISCARD(vap, 2426 IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG, 2427 (struct ieee80211_frame *) wh, NULL, 2428 "aid mismatch: sta aid 0x%x poll aid 0x%x", 2429 ni->ni_associd, aid); 2430 vap->iv_stats.is_ps_badaid++; 2431 /* 2432 * NB: We used to deauth the station but it turns out 2433 * the Blackberry Curve 8230 (and perhaps other devices) 2434 * sometimes send the wrong AID when WME is negotiated. 2435 * Being more lenient here seems ok as we already check 2436 * the station is associated and we only return frames 2437 * queued for the station (i.e. we don't use the AID). 2438 */ 2439 return; 2440 } 2441 2442 /* Okay, take the first queued packet and put it out... */ 2443 m = ieee80211_node_psq_dequeue(ni, &qlen); 2444 if (m == NULL) { 2445 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_POWER, wh->i_addr2, 2446 "%s", "recv ps-poll, but queue empty"); 2447 ieee80211_send_nulldata(ieee80211_ref_node(ni)); 2448 vap->iv_stats.is_ps_qempty++; /* XXX node stat */ 2449 if (vap->iv_set_tim != NULL) 2450 vap->iv_set_tim(ni, 0); /* just in case */ 2451 return; 2452 } 2453 /* 2454 * If there are more packets, set the more packets bit 2455 * in the packet dispatched to the station; otherwise 2456 * turn off the TIM bit. 2457 */ 2458 if (qlen != 0) { 2459 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 2460 "recv ps-poll, send packet, %u still queued", qlen); 2461 m->m_flags |= M_MORE_DATA; 2462 } else { 2463 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni, 2464 "%s", "recv ps-poll, send packet, queue empty"); 2465 if (vap->iv_set_tim != NULL) 2466 vap->iv_set_tim(ni, 0); 2467 } 2468 m->m_flags |= M_PWR_SAV; /* bypass PS handling */ 2469 2470 /* 2471 * Do the right thing; if it's an encap'ed frame then 2472 * call ieee80211_parent_xmitpkt() else 2473 * call ieee80211_vap_xmitpkt(). 2474 */ 2475 if (m->m_flags & M_ENCAP) { 2476 (void) ieee80211_parent_xmitpkt(ic, m); 2477 } else { 2478 (void) ieee80211_vap_xmitpkt(vap, m); 2479 } 2480} 2481