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: releng/11.1/sys/net80211/ieee80211_wds.c 299575 2016-05-12 22:17:00Z avos $");
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 IEEE80211_TX_LOCK(ic);
292 mcopy = ieee80211_encap(vap, ni, mcopy);
293 if (mcopy == NULL) {
294 /* NB: stat+msg handled in ieee80211_encap */
295 IEEE80211_TX_UNLOCK(ic);
296 ieee80211_free_node(ni);
297 continue;
298 }
299 mcopy->m_flags |= M_MCAST;
300 mcopy->m_pkthdr.rcvif = (void *) ni;
301
302 err = ieee80211_parent_xmitpkt(ic, mcopy);
303 IEEE80211_TX_UNLOCK(ic);
304 if (!err) {
305 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
306 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1);
307 if_inc_counter(ifp, IFCOUNTER_OBYTES,
308 m->m_pkthdr.len);
309 }
310 }
311 }
312
313 /*
314 * Handle DWDS discovery on receipt of a 4-address frame in
315 * ap mode. Queue the frame and post an event for someone
316 * to plumb the necessary WDS vap for this station. Frames
317 * received prior to the vap set running will then be reprocessed
318 * as if they were just received.
319 */
320 void
321 ieee80211_dwds_discover(struct ieee80211_node *ni, struct mbuf *m)
322 {
323 struct ieee80211com *ic = ni->ni_ic;
324
325 /*
326 * Save the frame with an aging interval 4 times
327 * the listen interval specified by the station.
328 * Frames that sit around too long are reclaimed
329 * using this information.
330 * XXX handle overflow?
331 * XXX per/vap beacon interval?
332 */
333 m->m_pkthdr.rcvif = (void *)(uintptr_t)
334 ieee80211_mac_hash(ic, ni->ni_macaddr);
335 (void) ieee80211_ageq_append(&ic->ic_stageq, m,
336 ((ni->ni_intval * ic->ic_lintval) << 2) / 1024);
337 ieee80211_notify_wds_discover(ni);
338 }
339
340 /*
341 * IEEE80211_M_WDS vap state machine handler.
342 */
343 static int
344 wds_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
345 {
346 struct ieee80211com *ic = vap->iv_ic;
347 enum ieee80211_state ostate;
348 int error;
349
350 IEEE80211_LOCK_ASSERT(ic);
351
352 ostate = vap->iv_state;
353 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s\n", __func__,
354 ieee80211_state_name[ostate], ieee80211_state_name[nstate]);
355 vap->iv_state = nstate; /* state transition */
356 callout_stop(&vap->iv_mgtsend); /* XXX callout_drain */
357 if (ostate != IEEE80211_S_SCAN)
358 ieee80211_cancel_scan(vap); /* background scan */
359 error = 0;
360 switch (nstate) {
361 case IEEE80211_S_INIT:
362 switch (ostate) {
363 case IEEE80211_S_SCAN:
364 ieee80211_cancel_scan(vap);
365 break;
366 default:
367 break;
368 }
369 if (ostate != IEEE80211_S_INIT) {
370 /* NB: optimize INIT -> INIT case */
371 ieee80211_reset_bss(vap);
372 }
373 break;
374 case IEEE80211_S_SCAN:
375 switch (ostate) {
376 case IEEE80211_S_INIT:
377 ieee80211_check_scan_current(vap);
378 break;
379 default:
380 break;
381 }
382 break;
383 case IEEE80211_S_RUN:
384 if (ostate == IEEE80211_S_INIT) {
385 /*
386 * Already have a channel; bypass the scan
387 * and startup immediately.
388 */
389 error = ieee80211_create_wds(vap, ic->ic_curchan);
390 }
391 break;
392 default:
393 break;
394 }
395 return error;
396 }
397
398 /*
399 * Process a received frame. The node associated with the sender
400 * should be supplied. If nothing was found in the node table then
401 * the caller is assumed to supply a reference to iv_bss instead.
402 * The RSSI and a timestamp are also supplied. The RSSI data is used
403 * during AP scanning to select a AP to associate with; it can have
404 * any units so long as values have consistent units and higher values
405 * mean ``better signal''. The receive timestamp is currently not used
406 * by the 802.11 layer.
407 */
408 static int
409 wds_input(struct ieee80211_node *ni, struct mbuf *m,
410 const struct ieee80211_rx_stats *rxs, int rssi, int nf)
411 {
412 struct ieee80211vap *vap = ni->ni_vap;
413 struct ieee80211com *ic = ni->ni_ic;
414 struct ifnet *ifp = vap->iv_ifp;
415 struct ieee80211_frame *wh;
416 struct ieee80211_key *key;
417 struct ether_header *eh;
418 int hdrspace, need_tap = 1; /* mbuf need to be tapped. */
419 uint8_t dir, type, subtype, qos;
420
421 if (m->m_flags & M_AMPDU_MPDU) {
422 /*
423 * Fastpath for A-MPDU reorder q resubmission. Frames
424 * w/ M_AMPDU_MPDU marked have already passed through
425 * here but were received out of order and been held on
426 * the reorder queue. When resubmitted they are marked
427 * with the M_AMPDU_MPDU flag and we can bypass most of
428 * the normal processing.
429 */
430 wh = mtod(m, struct ieee80211_frame *);
431 type = IEEE80211_FC0_TYPE_DATA;
432 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
433 subtype = IEEE80211_FC0_SUBTYPE_QOS;
434 hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */
435 goto resubmit_ampdu;
436 }
437
438 KASSERT(ni != NULL, ("null node"));
439
440 type = -1; /* undefined */
441
442 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
443 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
444 ni->ni_macaddr, NULL,
445 "too short (1): len %u", m->m_pkthdr.len);
446 vap->iv_stats.is_rx_tooshort++;
447 goto out;
448 }
449 /*
450 * Bit of a cheat here, we use a pointer for a 3-address
451 * frame format but don't reference fields past outside
452 * ieee80211_frame_min w/o first validating the data is
453 * present.
454 */
455 wh = mtod(m, struct ieee80211_frame *);
456
457 if (!IEEE80211_IS_MULTICAST(wh->i_addr1))
458 ni->ni_inact = ni->ni_inact_reload;
459
460 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
461 IEEE80211_FC0_VERSION_0) {
462 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
463 ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x",
464 wh->i_fc[0], wh->i_fc[1]);
465 vap->iv_stats.is_rx_badversion++;
466 goto err;
467 }
468
469 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
470 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
471 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
472
473 /* NB: WDS vap's do not scan */
474 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_addr4)) {
475 IEEE80211_DISCARD_MAC(vap,
476 IEEE80211_MSG_ANY, ni->ni_macaddr, NULL,
477 "too short (3): len %u", m->m_pkthdr.len);
478 vap->iv_stats.is_rx_tooshort++;
479 goto out;
480 }
481 /* NB: the TA is implicitly verified by finding the wds peer node */
482 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr) &&
483 !IEEE80211_ADDR_EQ(wh->i_addr1, ifp->if_broadcastaddr)) {
484 /* not interested in */
485 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
486 wh->i_addr1, NULL, "%s", "not to bss");
487 vap->iv_stats.is_rx_wrongbss++;
488 goto out;
489 }
490 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
491 ni->ni_noise = nf;
492 if (IEEE80211_HAS_SEQ(type, subtype)) {
493 uint8_t tid = ieee80211_gettid(wh);
494 if (IEEE80211_QOS_HAS_SEQ(wh) &&
495 TID_TO_WME_AC(tid) >= WME_AC_VI)
496 ic->ic_wme.wme_hipri_traffic++;
497 if (! ieee80211_check_rxseq(ni, wh, wh->i_addr1))
498 goto out;
499 }
500 switch (type) {
501 case IEEE80211_FC0_TYPE_DATA:
502 hdrspace = ieee80211_hdrspace(ic, wh);
503 if (m->m_len < hdrspace &&
504 (m = m_pullup(m, hdrspace)) == NULL) {
505 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
506 ni->ni_macaddr, NULL,
507 "data too short: expecting %u", hdrspace);
508 vap->iv_stats.is_rx_tooshort++;
509 goto out; /* XXX */
510 }
511 if (dir != IEEE80211_FC1_DIR_DSTODS) {
512 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
513 wh, "data", "incorrect dir 0x%x", dir);
514 vap->iv_stats.is_rx_wrongdir++;
515 goto out;
516 }
517 /*
518 * Only legacy WDS traffic should take this path.
519 */
520 if ((vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0) {
521 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
522 wh, "data", "%s", "not legacy wds");
523 vap->iv_stats.is_rx_wrongdir++;/*XXX*/
524 goto out;
525 }
526 /*
527 * Handle A-MPDU re-ordering. If the frame is to be
528 * processed directly then ieee80211_ampdu_reorder
529 * will return 0; otherwise it has consumed the mbuf
530 * and we should do nothing more with it.
531 */
532 if ((m->m_flags & M_AMPDU) &&
533 ieee80211_ampdu_reorder(ni, m) != 0) {
534 m = NULL;
535 goto out;
536 }
537 resubmit_ampdu:
538
539 /*
540 * Handle privacy requirements. Note that we
541 * must not be preempted from here until after
542 * we (potentially) call ieee80211_crypto_demic;
543 * otherwise we may violate assumptions in the
544 * crypto cipher modules used to do delayed update
545 * of replay sequence numbers.
546 */
547 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
548 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
549 /*
550 * Discard encrypted frames when privacy is off.
551 */
552 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
553 wh, "WEP", "%s", "PRIVACY off");
554 vap->iv_stats.is_rx_noprivacy++;
555 IEEE80211_NODE_STAT(ni, rx_noprivacy);
556 goto out;
557 }
558 key = ieee80211_crypto_decap(ni, m, hdrspace);
559 if (key == NULL) {
560 /* NB: stats+msgs handled in crypto_decap */
561 IEEE80211_NODE_STAT(ni, rx_wepfail);
562 goto out;
563 }
564 wh = mtod(m, struct ieee80211_frame *);
565 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED;
566 } else {
567 /* XXX M_WEP and IEEE80211_F_PRIVACY */
568 key = NULL;
569 }
570
571 /*
572 * Save QoS bits for use below--before we strip the header.
573 */
574 if (subtype == IEEE80211_FC0_SUBTYPE_QOS) {
575 qos = (dir == IEEE80211_FC1_DIR_DSTODS) ?
576 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] :
577 ((struct ieee80211_qosframe *)wh)->i_qos[0];
578 } else
579 qos = 0;
580
581 /*
582 * Next up, any fragmentation.
583 */
584 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
585 m = ieee80211_defrag(ni, m, hdrspace);
586 if (m == NULL) {
587 /* Fragment dropped or frame not complete yet */
588 goto out;
589 }
590 }
591 wh = NULL; /* no longer valid, catch any uses */
592
593 /*
594 * Next strip any MSDU crypto bits.
595 */
596 if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) {
597 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
598 ni->ni_macaddr, "data", "%s", "demic error");
599 vap->iv_stats.is_rx_demicfail++;
600 IEEE80211_NODE_STAT(ni, rx_demicfail);
601 goto out;
602 }
603
604 /* copy to listener after decrypt */
605 if (ieee80211_radiotap_active_vap(vap))
606 ieee80211_radiotap_rx(vap, m);
607 need_tap = 0;
608
609 /*
610 * Finally, strip the 802.11 header.
611 */
612 m = ieee80211_decap(vap, m, hdrspace);
613 if (m == NULL) {
614 /* XXX mask bit to check for both */
615 /* don't count Null data frames as errors */
616 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
617 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
618 goto out;
619 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
620 ni->ni_macaddr, "data", "%s", "decap error");
621 vap->iv_stats.is_rx_decap++;
622 IEEE80211_NODE_STAT(ni, rx_decap);
623 goto err;
624 }
625 eh = mtod(m, struct ether_header *);
626 if (!ieee80211_node_is_authorized(ni)) {
627 /*
628 * Deny any non-PAE frames received prior to
629 * authorization. For open/shared-key
630 * authentication the port is mark authorized
631 * after authentication completes. For 802.1x
632 * the port is not marked authorized by the
633 * authenticator until the handshake has completed.
634 */
635 if (eh->ether_type != htons(ETHERTYPE_PAE)) {
636 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
637 eh->ether_shost, "data",
638 "unauthorized port: ether type 0x%x len %u",
639 eh->ether_type, m->m_pkthdr.len);
640 vap->iv_stats.is_rx_unauth++;
641 IEEE80211_NODE_STAT(ni, rx_unauth);
642 goto err;
643 }
644 } else {
645 /*
646 * When denying unencrypted frames, discard
647 * any non-PAE frames received without encryption.
648 */
649 if ((vap->iv_flags & IEEE80211_F_DROPUNENC) &&
650 (key == NULL && (m->m_flags & M_WEP) == 0) &&
651 eh->ether_type != htons(ETHERTYPE_PAE)) {
652 /*
653 * Drop unencrypted frames.
654 */
655 vap->iv_stats.is_rx_unencrypted++;
656 IEEE80211_NODE_STAT(ni, rx_unencrypted);
657 goto out;
658 }
659 }
660 /* XXX require HT? */
661 if (qos & IEEE80211_QOS_AMSDU) {
662 m = ieee80211_decap_amsdu(ni, m);
663 if (m == NULL)
664 return IEEE80211_FC0_TYPE_DATA;
665 } else {
666 #ifdef IEEE80211_SUPPORT_SUPERG
667 m = ieee80211_decap_fastframe(vap, ni, m);
668 if (m == NULL)
669 return IEEE80211_FC0_TYPE_DATA;
670 #endif
671 }
672 ieee80211_deliver_data(vap, ni, m);
673 return IEEE80211_FC0_TYPE_DATA;
674
675 case IEEE80211_FC0_TYPE_MGT:
676 vap->iv_stats.is_rx_mgmt++;
677 IEEE80211_NODE_STAT(ni, rx_mgmt);
678 if (dir != IEEE80211_FC1_DIR_NODS) {
679 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
680 wh, "data", "incorrect dir 0x%x", dir);
681 vap->iv_stats.is_rx_wrongdir++;
682 goto err;
683 }
684 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
685 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
686 ni->ni_macaddr, "mgt", "too short: len %u",
687 m->m_pkthdr.len);
688 vap->iv_stats.is_rx_tooshort++;
689 goto out;
690 }
691 #ifdef IEEE80211_DEBUG
692 if (ieee80211_msg_debug(vap) || ieee80211_msg_dumppkts(vap)) {
693 if_printf(ifp, "received %s from %s rssi %d\n",
694 ieee80211_mgt_subtype_name(subtype),
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 }
Cache object: 009e978f58be84791c4188efa668585a
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