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 WDS 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_var.h> 52 #include <net/if_media.h> 53 #include <net/if_llc.h> 54 #include <net/ethernet.h> 55 56 #include <net/bpf.h> 57 58 #include <net80211/ieee80211_var.h> 59 #include <net80211/ieee80211_wds.h> 60 #include <net80211/ieee80211_input.h> 61 #ifdef IEEE80211_SUPPORT_SUPERG 62 #include <net80211/ieee80211_superg.h> 63 #endif 64 65 static void wds_vattach(struct ieee80211vap *); 66 static int wds_newstate(struct ieee80211vap *, enum ieee80211_state, int); 67 static int wds_input(struct ieee80211_node *ni, struct mbuf *m, 68 const struct ieee80211_rx_stats *rxs, int, int); 69 static void wds_recv_mgmt(struct ieee80211_node *, struct mbuf *, int subtype, 70 const struct ieee80211_rx_stats *, int, int); 71 72 void 73 ieee80211_wds_attach(struct ieee80211com *ic) 74 { 75 ic->ic_vattach[IEEE80211_M_WDS] = wds_vattach; 76 } 77 78 void 79 ieee80211_wds_detach(struct ieee80211com *ic) 80 { 81 } 82 83 static void 84 wds_vdetach(struct ieee80211vap *vap) 85 { 86 if (vap->iv_bss != NULL) { 87 /* XXX locking? */ 88 if (vap->iv_bss->ni_wdsvap == vap) 89 vap->iv_bss->ni_wdsvap = NULL; 90 } 91 } 92 93 static void 94 wds_vattach(struct ieee80211vap *vap) 95 { 96 vap->iv_newstate = wds_newstate; 97 vap->iv_input = wds_input; 98 vap->iv_recv_mgmt = wds_recv_mgmt; 99 vap->iv_opdetach = wds_vdetach; 100 } 101 102 static void 103 wds_flush(struct ieee80211_node *ni) 104 { 105 struct ieee80211com *ic = ni->ni_ic; 106 struct mbuf *m, *next; 107 int8_t rssi, nf; 108 109 m = ieee80211_ageq_remove(&ic->ic_stageq, 110 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); 111 if (m == NULL) 112 return; 113 114 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_WDS, ni, 115 "%s", "flush wds queue"); 116 ic->ic_node_getsignal(ni, &rssi, &nf); 117 for (; m != NULL; m = next) { 118 next = m->m_nextpkt; 119 m->m_nextpkt = NULL; 120 ieee80211_input(ni, m, rssi, nf); 121 } 122 } 123 124 static int 125 ieee80211_create_wds(struct ieee80211vap *vap, struct ieee80211_channel *chan) 126 { 127 struct ieee80211com *ic = vap->iv_ic; 128 struct ieee80211_node_table *nt = &ic->ic_sta; 129 struct ieee80211_node *ni, *obss; 130 131 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WDS, 132 "%s: creating link to %s on channel %u\n", __func__, 133 ether_sprintf(vap->iv_des_bssid), ieee80211_chan2ieee(ic, chan)); 134 135 /* NB: vap create must specify the bssid for the link */ 136 KASSERT(vap->iv_flags & IEEE80211_F_DESBSSID, ("no bssid")); 137 /* NB: we should only be called on RUN transition */ 138 KASSERT(vap->iv_state == IEEE80211_S_RUN, ("!RUN state")); 139 140 if ((vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0) { 141 /* 142 * Dynamic/non-legacy WDS. Reference the associated 143 * station specified by the desired bssid setup at vap 144 * create. Point ni_wdsvap at the WDS vap so 4-address 145 * frames received through the associated AP vap will 146 * be dispatched upward (e.g. to a bridge) as though 147 * they arrived on the WDS vap. 148 */ 149 IEEE80211_NODE_LOCK(nt); 150 obss = NULL; 151 ni = ieee80211_find_node_locked(&ic->ic_sta, vap->iv_des_bssid); 152 if (ni == NULL) { 153 /* 154 * Node went away before we could hookup. This 155 * should be ok; no traffic will flow and a leave 156 * event will be dispatched that should cause 157 * the vap to be destroyed. 158 */ 159 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WDS, 160 "%s: station %s went away\n", 161 __func__, ether_sprintf(vap->iv_des_bssid)); 162 /* XXX stat? */ 163 } else if (ni->ni_wdsvap != NULL) { 164 /* 165 * Node already setup with a WDS vap; we cannot 166 * allow multiple references so disallow. If 167 * ni_wdsvap points at us that's ok; we should 168 * do nothing anyway. 169 */ 170 /* XXX printf instead? */ 171 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WDS, 172 "%s: station %s in use with %s\n", 173 __func__, ether_sprintf(vap->iv_des_bssid), 174 ni->ni_wdsvap->iv_ifp->if_xname); 175 /* XXX stat? */ 176 } else { 177 /* 178 * Committed to new node, setup state. 179 */ 180 obss = vap->iv_bss; 181 vap->iv_bss = ni; 182 ni->ni_wdsvap = vap; 183 } 184 IEEE80211_NODE_UNLOCK(nt); 185 if (obss != NULL) { 186 /* NB: deferred to avoid recursive lock */ 187 ieee80211_free_node(obss); 188 } 189 } else { 190 /* 191 * Legacy WDS vap setup. 192 */ 193 /* 194 * The far end does not associate so we just create 195 * create a new node and install it as the vap's 196 * bss node. We must simulate an association and 197 * authorize the port for traffic to flow. 198 * XXX check if node already in sta table? 199 */ 200 ni = ieee80211_node_create_wds(vap, vap->iv_des_bssid, chan); 201 if (ni != NULL) { 202 obss = vap->iv_bss; 203 vap->iv_bss = ieee80211_ref_node(ni); 204 ni->ni_flags |= IEEE80211_NODE_AREF; 205 if (obss != NULL) 206 ieee80211_free_node(obss); 207 /* give driver a chance to setup state like ni_txrate */ 208 if (ic->ic_newassoc != NULL) 209 ic->ic_newassoc(ni, 1); 210 /* tell the authenticator about new station */ 211 if (vap->iv_auth->ia_node_join != NULL) 212 vap->iv_auth->ia_node_join(ni); 213 if (ni->ni_authmode != IEEE80211_AUTH_8021X) 214 ieee80211_node_authorize(ni); 215 216 ieee80211_notify_node_join(ni, 1 /*newassoc*/); 217 /* XXX inject l2uf frame */ 218 } 219 } 220 221 /* 222 * Flush any pending frames now that were setup. 223 */ 224 if (ni != NULL) 225 wds_flush(ni); 226 return (ni == NULL ? ENOENT : 0); 227 } 228 229 /* 230 * Propagate multicast frames of an ap vap to all DWDS links. 231 * The caller is assumed to have verified this frame is multicast. 232 */ 233 void 234 ieee80211_dwds_mcast(struct ieee80211vap *vap0, struct mbuf *m) 235 { 236 struct ieee80211com *ic = vap0->iv_ic; 237 const struct ether_header *eh = mtod(m, const struct ether_header *); 238 struct ieee80211_node *ni; 239 struct ieee80211vap *vap; 240 struct ifnet *ifp; 241 struct mbuf *mcopy; 242 int err; 243 244 KASSERT(ETHER_IS_MULTICAST(eh->ether_dhost), 245 ("%s not mcast", ether_sprintf(eh->ether_dhost))); 246 247 /* XXX locking */ 248 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 249 /* only DWDS vaps are interesting */ 250 if (vap->iv_opmode != IEEE80211_M_WDS || 251 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY)) 252 continue; 253 /* if it came in this interface, don't send it back out */ 254 ifp = vap->iv_ifp; 255 if (ifp == m->m_pkthdr.rcvif) 256 continue; 257 /* 258 * Duplicate the frame and send it. 259 */ 260 mcopy = m_copypacket(m, M_NOWAIT); 261 if (mcopy == NULL) { 262 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 263 /* XXX stat + msg */ 264 continue; 265 } 266 ni = ieee80211_find_txnode(vap, eh->ether_dhost); 267 if (ni == NULL) { 268 /* NB: ieee80211_find_txnode does stat+msg */ 269 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 270 m_freem(mcopy); 271 continue; 272 } 273 /* calculate priority so drivers can find the tx queue */ 274 if (ieee80211_classify(ni, mcopy)) { 275 IEEE80211_DISCARD_MAC(vap, 276 IEEE80211_MSG_OUTPUT | IEEE80211_MSG_WDS, 277 eh->ether_dhost, NULL, 278 "%s", "classification failure"); 279 vap->iv_stats.is_tx_classify++; 280 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 281 m_freem(mcopy); 282 ieee80211_free_node(ni); 283 continue; 284 } 285 286 BPF_MTAP(ifp, m); /* 802.3 tx */ 287 288 /* 289 * Encapsulate the packet in prep for transmission. 290 */ 291 mcopy = ieee80211_encap(vap, ni, mcopy); 292 if (mcopy == NULL) { 293 /* NB: stat+msg handled in ieee80211_encap */ 294 ieee80211_free_node(ni); 295 continue; 296 } 297 mcopy->m_flags |= M_MCAST; 298 mcopy->m_pkthdr.rcvif = (void *) ni; 299 300 err = ieee80211_parent_xmitpkt(ic, mcopy); 301 if (!err) { 302 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 303 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1); 304 if_inc_counter(ifp, IFCOUNTER_OBYTES, 305 m->m_pkthdr.len); 306 } 307 } 308 } 309 310 /* 311 * Handle DWDS discovery on receipt of a 4-address frame in 312 * ap mode. Queue the frame and post an event for someone 313 * to plumb the necessary WDS vap for this station. Frames 314 * received prior to the vap set running will then be reprocessed 315 * as if they were just received. 316 */ 317 void 318 ieee80211_dwds_discover(struct ieee80211_node *ni, struct mbuf *m) 319 { 320 struct ieee80211com *ic = ni->ni_ic; 321 322 /* 323 * Save the frame with an aging interval 4 times 324 * the listen interval specified by the station. 325 * Frames that sit around too long are reclaimed 326 * using this information. 327 * XXX handle overflow? 328 * XXX per/vap beacon interval? 329 */ 330 m->m_pkthdr.rcvif = (void *)(uintptr_t) 331 ieee80211_mac_hash(ic, ni->ni_macaddr); 332 (void) ieee80211_ageq_append(&ic->ic_stageq, m, 333 ((ni->ni_intval * ic->ic_lintval) << 2) / 1024); 334 ieee80211_notify_wds_discover(ni); 335 } 336 337 /* 338 * IEEE80211_M_WDS vap state machine handler. 339 */ 340 static int 341 wds_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 342 { 343 struct ieee80211com *ic = vap->iv_ic; 344 struct ieee80211_node *ni; 345 enum ieee80211_state ostate; 346 int error; 347 348 IEEE80211_LOCK_ASSERT(ic); 349 350 ostate = vap->iv_state; 351 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s\n", __func__, 352 ieee80211_state_name[ostate], ieee80211_state_name[nstate]); 353 vap->iv_state = nstate; /* state transition */ 354 callout_stop(&vap->iv_mgtsend); /* XXX callout_drain */ 355 if (ostate != IEEE80211_S_SCAN) 356 ieee80211_cancel_scan(vap); /* background scan */ 357 ni = vap->iv_bss; /* NB: no reference held */ 358 error = 0; 359 switch (nstate) { 360 case IEEE80211_S_INIT: 361 switch (ostate) { 362 case IEEE80211_S_SCAN: 363 ieee80211_cancel_scan(vap); 364 break; 365 default: 366 break; 367 } 368 if (ostate != IEEE80211_S_INIT) { 369 /* NB: optimize INIT -> INIT case */ 370 ieee80211_reset_bss(vap); 371 } 372 break; 373 case IEEE80211_S_SCAN: 374 switch (ostate) { 375 case IEEE80211_S_INIT: 376 ieee80211_check_scan_current(vap); 377 break; 378 default: 379 break; 380 } 381 break; 382 case IEEE80211_S_RUN: 383 if (ostate == IEEE80211_S_INIT) { 384 /* 385 * Already have a channel; bypass the scan 386 * and startup immediately. 387 */ 388 error = ieee80211_create_wds(vap, ic->ic_curchan); 389 } 390 break; 391 default: 392 break; 393 } 394 return error; 395 } 396 397 /* 398 * Process a received frame. The node associated with the sender 399 * should be supplied. If nothing was found in the node table then 400 * the caller is assumed to supply a reference to iv_bss instead. 401 * The RSSI and a timestamp are also supplied. The RSSI data is used 402 * during AP scanning to select a AP to associate with; it can have 403 * any units so long as values have consistent units and higher values 404 * mean ``better signal''. The receive timestamp is currently not used 405 * by the 802.11 layer. 406 */ 407 static int 408 wds_input(struct ieee80211_node *ni, struct mbuf *m, 409 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 410 { 411 struct ieee80211vap *vap = ni->ni_vap; 412 struct ieee80211com *ic = ni->ni_ic; 413 struct ifnet *ifp = vap->iv_ifp; 414 struct ieee80211_frame *wh; 415 struct ieee80211_key *key; 416 struct ether_header *eh; 417 int hdrspace, need_tap = 1; /* mbuf need to be tapped. */ 418 uint8_t dir, type, subtype, qos; 419 420 if (m->m_flags & M_AMPDU_MPDU) { 421 /* 422 * Fastpath for A-MPDU reorder q resubmission. Frames 423 * w/ M_AMPDU_MPDU marked have already passed through 424 * here but were received out of order and been held on 425 * the reorder queue. When resubmitted they are marked 426 * with the M_AMPDU_MPDU flag and we can bypass most of 427 * the normal processing. 428 */ 429 wh = mtod(m, struct ieee80211_frame *); 430 type = IEEE80211_FC0_TYPE_DATA; 431 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 432 subtype = IEEE80211_FC0_SUBTYPE_QOS; 433 hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ 434 goto resubmit_ampdu; 435 } 436 437 KASSERT(ni != NULL, ("null node")); 438 439 type = -1; /* undefined */ 440 441 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 442 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 443 ni->ni_macaddr, NULL, 444 "too short (1): len %u", m->m_pkthdr.len); 445 vap->iv_stats.is_rx_tooshort++; 446 goto out; 447 } 448 /* 449 * Bit of a cheat here, we use a pointer for a 3-address 450 * frame format but don't reference fields past outside 451 * ieee80211_frame_min w/o first validating the data is 452 * present. 453 */ 454 wh = mtod(m, struct ieee80211_frame *); 455 456 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) 457 ni->ni_inact = ni->ni_inact_reload; 458 459 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 460 IEEE80211_FC0_VERSION_0) { 461 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 462 ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x", 463 wh->i_fc[0], wh->i_fc[1]); 464 vap->iv_stats.is_rx_badversion++; 465 goto err; 466 } 467 468 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 469 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 470 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 471 472 /* NB: WDS vap's do not scan */ 473 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_addr4)) { 474 IEEE80211_DISCARD_MAC(vap, 475 IEEE80211_MSG_ANY, ni->ni_macaddr, NULL, 476 "too short (3): len %u", m->m_pkthdr.len); 477 vap->iv_stats.is_rx_tooshort++; 478 goto out; 479 } 480 /* NB: the TA is implicitly verified by finding the wds peer node */ 481 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr) && 482 !IEEE80211_ADDR_EQ(wh->i_addr1, ifp->if_broadcastaddr)) { 483 /* not interested in */ 484 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 485 wh->i_addr1, NULL, "%s", "not to bss"); 486 vap->iv_stats.is_rx_wrongbss++; 487 goto out; 488 } 489 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 490 ni->ni_noise = nf; 491 if (IEEE80211_HAS_SEQ(type, subtype)) { 492 uint8_t tid = ieee80211_gettid(wh); 493 if (IEEE80211_QOS_HAS_SEQ(wh) && 494 TID_TO_WME_AC(tid) >= WME_AC_VI) 495 ic->ic_wme.wme_hipri_traffic++; 496 if (! ieee80211_check_rxseq(ni, wh, wh->i_addr1)) 497 goto out; 498 } 499 switch (type) { 500 case IEEE80211_FC0_TYPE_DATA: 501 hdrspace = ieee80211_hdrspace(ic, wh); 502 if (m->m_len < hdrspace && 503 (m = m_pullup(m, hdrspace)) == NULL) { 504 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 505 ni->ni_macaddr, NULL, 506 "data too short: expecting %u", hdrspace); 507 vap->iv_stats.is_rx_tooshort++; 508 goto out; /* XXX */ 509 } 510 if (dir != IEEE80211_FC1_DIR_DSTODS) { 511 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 512 wh, "data", "incorrect dir 0x%x", dir); 513 vap->iv_stats.is_rx_wrongdir++; 514 goto out; 515 } 516 /* 517 * Only legacy WDS traffic should take this path. 518 */ 519 if ((vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0) { 520 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 521 wh, "data", "%s", "not legacy wds"); 522 vap->iv_stats.is_rx_wrongdir++;/*XXX*/ 523 goto out; 524 } 525 /* 526 * Handle A-MPDU re-ordering. If the frame is to be 527 * processed directly then ieee80211_ampdu_reorder 528 * will return 0; otherwise it has consumed the mbuf 529 * and we should do nothing more with it. 530 */ 531 if ((m->m_flags & M_AMPDU) && 532 ieee80211_ampdu_reorder(ni, m) != 0) { 533 m = NULL; 534 goto out; 535 } 536 resubmit_ampdu: 537 538 /* 539 * Handle privacy requirements. Note that we 540 * must not be preempted from here until after 541 * we (potentially) call ieee80211_crypto_demic; 542 * otherwise we may violate assumptions in the 543 * crypto cipher modules used to do delayed update 544 * of replay sequence numbers. 545 */ 546 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 547 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 548 /* 549 * Discard encrypted frames when privacy is off. 550 */ 551 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 552 wh, "WEP", "%s", "PRIVACY off"); 553 vap->iv_stats.is_rx_noprivacy++; 554 IEEE80211_NODE_STAT(ni, rx_noprivacy); 555 goto out; 556 } 557 key = ieee80211_crypto_decap(ni, m, hdrspace); 558 if (key == NULL) { 559 /* NB: stats+msgs handled in crypto_decap */ 560 IEEE80211_NODE_STAT(ni, rx_wepfail); 561 goto out; 562 } 563 wh = mtod(m, struct ieee80211_frame *); 564 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 565 } else { 566 /* XXX M_WEP and IEEE80211_F_PRIVACY */ 567 key = NULL; 568 } 569 570 /* 571 * Save QoS bits for use below--before we strip the header. 572 */ 573 if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { 574 qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? 575 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : 576 ((struct ieee80211_qosframe *)wh)->i_qos[0]; 577 } else 578 qos = 0; 579 580 /* 581 * Next up, any fragmentation. 582 */ 583 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 584 m = ieee80211_defrag(ni, m, hdrspace); 585 if (m == NULL) { 586 /* Fragment dropped or frame not complete yet */ 587 goto out; 588 } 589 } 590 wh = NULL; /* no longer valid, catch any uses */ 591 592 /* 593 * Next strip any MSDU crypto bits. 594 */ 595 if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) { 596 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 597 ni->ni_macaddr, "data", "%s", "demic error"); 598 vap->iv_stats.is_rx_demicfail++; 599 IEEE80211_NODE_STAT(ni, rx_demicfail); 600 goto out; 601 } 602 603 /* copy to listener after decrypt */ 604 if (ieee80211_radiotap_active_vap(vap)) 605 ieee80211_radiotap_rx(vap, m); 606 need_tap = 0; 607 608 /* 609 * Finally, strip the 802.11 header. 610 */ 611 m = ieee80211_decap(vap, m, hdrspace); 612 if (m == NULL) { 613 /* XXX mask bit to check for both */ 614 /* don't count Null data frames as errors */ 615 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 616 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 617 goto out; 618 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 619 ni->ni_macaddr, "data", "%s", "decap error"); 620 vap->iv_stats.is_rx_decap++; 621 IEEE80211_NODE_STAT(ni, rx_decap); 622 goto err; 623 } 624 eh = mtod(m, struct ether_header *); 625 if (!ieee80211_node_is_authorized(ni)) { 626 /* 627 * Deny any non-PAE frames received prior to 628 * authorization. For open/shared-key 629 * authentication the port is mark authorized 630 * after authentication completes. For 802.1x 631 * the port is not marked authorized by the 632 * authenticator until the handshake has completed. 633 */ 634 if (eh->ether_type != htons(ETHERTYPE_PAE)) { 635 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 636 eh->ether_shost, "data", 637 "unauthorized port: ether type 0x%x len %u", 638 eh->ether_type, m->m_pkthdr.len); 639 vap->iv_stats.is_rx_unauth++; 640 IEEE80211_NODE_STAT(ni, rx_unauth); 641 goto err; 642 } 643 } else { 644 /* 645 * When denying unencrypted frames, discard 646 * any non-PAE frames received without encryption. 647 */ 648 if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && 649 (key == NULL && (m->m_flags & M_WEP) == 0) && 650 eh->ether_type != htons(ETHERTYPE_PAE)) { 651 /* 652 * Drop unencrypted frames. 653 */ 654 vap->iv_stats.is_rx_unencrypted++; 655 IEEE80211_NODE_STAT(ni, rx_unencrypted); 656 goto out; 657 } 658 } 659 /* XXX require HT? */ 660 if (qos & IEEE80211_QOS_AMSDU) { 661 m = ieee80211_decap_amsdu(ni, m); 662 if (m == NULL) 663 return IEEE80211_FC0_TYPE_DATA; 664 } else { 665 #ifdef IEEE80211_SUPPORT_SUPERG 666 m = ieee80211_decap_fastframe(vap, ni, m); 667 if (m == NULL) 668 return IEEE80211_FC0_TYPE_DATA; 669 #endif 670 } 671 ieee80211_deliver_data(vap, ni, m); 672 return IEEE80211_FC0_TYPE_DATA; 673 674 case IEEE80211_FC0_TYPE_MGT: 675 vap->iv_stats.is_rx_mgmt++; 676 IEEE80211_NODE_STAT(ni, rx_mgmt); 677 if (dir != IEEE80211_FC1_DIR_NODS) { 678 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 679 wh, "data", "incorrect dir 0x%x", dir); 680 vap->iv_stats.is_rx_wrongdir++; 681 goto err; 682 } 683 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 684 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 685 ni->ni_macaddr, "mgt", "too short: len %u", 686 m->m_pkthdr.len); 687 vap->iv_stats.is_rx_tooshort++; 688 goto out; 689 } 690 #ifdef IEEE80211_DEBUG 691 if (ieee80211_msg_debug(vap) || ieee80211_msg_dumppkts(vap)) { 692 if_printf(ifp, "received %s from %s rssi %d\n", 693 ieee80211_mgt_subtype_name[subtype >> 694 IEEE80211_FC0_SUBTYPE_SHIFT], 695 ether_sprintf(wh->i_addr2), rssi); 696 } 697 #endif 698 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 699 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 700 wh, NULL, "%s", "WEP set but not permitted"); 701 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 702 goto out; 703 } 704 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); 705 goto out; 706 707 case IEEE80211_FC0_TYPE_CTL: 708 vap->iv_stats.is_rx_ctl++; 709 IEEE80211_NODE_STAT(ni, rx_ctrl); 710 goto out; 711 712 default: 713 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 714 wh, "bad", "frame type 0x%x", type); 715 /* should not come here */ 716 break; 717 } 718 err: 719 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 720 out: 721 if (m != NULL) { 722 if (need_tap && ieee80211_radiotap_active_vap(vap)) 723 ieee80211_radiotap_rx(vap, m); 724 m_freem(m); 725 } 726 return type; 727 } 728 729 static void 730 wds_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 731 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 732 { 733 struct ieee80211vap *vap = ni->ni_vap; 734 struct ieee80211com *ic = ni->ni_ic; 735 struct ieee80211_frame *wh; 736 u_int8_t *frm, *efrm; 737 738 wh = mtod(m0, struct ieee80211_frame *); 739 frm = (u_int8_t *)&wh[1]; 740 efrm = mtod(m0, u_int8_t *) + m0->m_len; 741 switch (subtype) { 742 case IEEE80211_FC0_SUBTYPE_ACTION: 743 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 744 if (ni == vap->iv_bss) { 745 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 746 wh, NULL, "%s", "unknown node"); 747 vap->iv_stats.is_rx_mgtdiscard++; 748 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1)) { 749 /* NB: not interested in multicast frames. */ 750 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 751 wh, NULL, "%s", "not for us"); 752 vap->iv_stats.is_rx_mgtdiscard++; 753 } else if (vap->iv_state != IEEE80211_S_RUN) { 754 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 755 wh, NULL, "wrong state %s", 756 ieee80211_state_name[vap->iv_state]); 757 vap->iv_stats.is_rx_mgtdiscard++; 758 } else { 759 if (ieee80211_parse_action(ni, m0) == 0) 760 (void)ic->ic_recv_action(ni, wh, frm, efrm); 761 } 762 break; 763 764 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 765 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 766 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 767 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 768 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 769 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 770 case IEEE80211_FC0_SUBTYPE_TIMING_ADV: 771 case IEEE80211_FC0_SUBTYPE_BEACON: 772 case IEEE80211_FC0_SUBTYPE_ATIM: 773 case IEEE80211_FC0_SUBTYPE_DISASSOC: 774 case IEEE80211_FC0_SUBTYPE_AUTH: 775 case IEEE80211_FC0_SUBTYPE_DEAUTH: 776 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 777 wh, NULL, "%s", "not handled"); 778 vap->iv_stats.is_rx_mgtdiscard++; 779 break; 780 781 default: 782 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 783 wh, "mgt", "subtype 0x%x not handled", subtype); 784 vap->iv_stats.is_rx_badsubtype++; 785 break; 786 } 787 } 788