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wlan - Rip out all wlan locks part 1/2
[dragonfly.git] / sys / netproto / 802_11 / wlan / ieee80211_wds.c
CommitLineData
32176cfd
RP		 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 * $FreeBSD: head/sys/net80211/ieee80211_wds.c 203422 2010-02-03 10:07:43Z rpaulo $
26 * $DragonFly$
27 */
28
29/*
30 * IEEE 802.11 WDS mode support.
31 */
32#include "opt_inet.h"
33#include "opt_wlan.h"
34
35#include <sys/param.h>
36#include <sys/systm.h>
37#include <sys/mbuf.h>
38#include <sys/malloc.h>
39#include <sys/kernel.h>
40
41#include <sys/socket.h>
42#include <sys/sockio.h>
43#include <sys/endian.h>
44#include <sys/errno.h>
45#include <sys/proc.h>
46#include <sys/sysctl.h>
47
48#include <net/if.h>
49#include <net/if_media.h>
50#include <net/if_llc.h>
51#include <net/ethernet.h>
52#include <net/route.h>
53
54#include <net/bpf.h>
55
56#include <netproto/802_11/ieee80211_var.h>
57#include <netproto/802_11/ieee80211_wds.h>
58#include <netproto/802_11/ieee80211_input.h>
59#ifdef IEEE80211_SUPPORT_SUPERG
60#include <netproto/802_11/ieee80211_superg.h>
61#endif
62
63static void wds_vattach(struct ieee80211vap *);
64static int wds_newstate(struct ieee80211vap *, enum ieee80211_state, int);
65static int wds_input(struct ieee80211_node *ni, struct mbuf *m, int, int);
66static void wds_recv_mgmt(struct ieee80211_node *, struct mbuf *,
67 int subtype, int, int);
68
69void
70ieee80211_wds_attach(struct ieee80211com *ic)
71{
72 ic->ic_vattach[IEEE80211_M_WDS] = wds_vattach;
73}
74
75void
76ieee80211_wds_detach(struct ieee80211com *ic)
77{
78}
79
80static void
81wds_vdetach(struct ieee80211vap *vap)
82{
83 if (vap->iv_bss != NULL) {
84 /* XXX locking? */
85 if (vap->iv_bss->ni_wdsvap == vap)
86 vap->iv_bss->ni_wdsvap = NULL;
87 }
88}
89
90static void
91wds_vattach(struct ieee80211vap *vap)
92{
93 vap->iv_newstate = wds_newstate;
94 vap->iv_input = wds_input;
95 vap->iv_recv_mgmt = wds_recv_mgmt;
96 vap->iv_opdetach = wds_vdetach;
97}
98
99static void
100wds_flush(struct ieee80211_node *ni)
101{
102 struct ieee80211com *ic = ni->ni_ic;
103 struct mbuf *m, *next;
104 int8_t rssi, nf;
105
106 m = ieee80211_ageq_remove(&ic->ic_stageq,
107 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr));
108 if (m == NULL)
109 return;
110
111 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_WDS, ni,
112 "%s", "flush wds queue");
113 ic->ic_node_getsignal(ni, &rssi, &nf);
114 for (; m != NULL; m = next) {
115 next = m->m_nextpkt;
116 m->m_nextpkt = NULL;
117 ieee80211_input(ni, m, rssi, nf);
118 }
119}
120
121static int
122ieee80211_create_wds(struct ieee80211vap *vap, struct ieee80211_channel *chan)
123{
124 struct ieee80211com *ic = vap->iv_ic;
26c6f223 125/* struct ieee80211_node_table *nt = &ic->ic_sta;*/
32176cfd
RP		 126 struct ieee80211_node *ni, *obss;
127
128 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WDS,
6168f72e
RP		 129 "%s: creating link to %6D on channel %u\n", __func__,
130 vap->iv_des_bssid, ":", ieee80211_chan2ieee(ic, chan));
32176cfd
RP		 131
132 /* NB: vap create must specify the bssid for the link */
133 KASSERT(vap->iv_flags & IEEE80211_F_DESBSSID, ("no bssid"));
134 /* NB: we should only be called on RUN transition */
135 KASSERT(vap->iv_state == IEEE80211_S_RUN, ("!RUN state"));
136
137 if ((vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0) {
138 /*
139 * Dynamic/non-legacy WDS. Reference the associated
140 * station specified by the desired bssid setup at vap
141 * create. Point ni_wdsvap at the WDS vap so 4-address
142 * frames received through the associated AP vap will
143 * be dispatched upward (e.g. to a bridge) as though
144 * they arrived on the WDS vap.
145 */
32176cfd
RP		 146 obss = NULL;
147 ni = ieee80211_find_node_locked(&ic->ic_sta, vap->iv_des_bssid);
148 if (ni == NULL) {
149 /*
150 * Node went away before we could hookup. This
151 * should be ok; no traffic will flow and a leave
152 * event will be dispatched that should cause
153 * the vap to be destroyed.
154 */
155 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WDS,
6168f72e
RP		 156 "%s: station %6D went away\n",
157 __func__, vap->iv_des_bssid, ":");
32176cfd
RP		 158 /* XXX stat? */
159 } else if (ni->ni_wdsvap != NULL) {
160 /*
161 * Node already setup with a WDS vap; we cannot
162 * allow multiple references so disallow. If
163 * ni_wdsvap points at us that's ok; we should
164 * do nothing anyway.
165 */
166 /* XXX printf instead? */
167 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WDS,
6168f72e
RP		 168 "%s: station %6D in use with %s\n",
169 __func__, vap->iv_des_bssid, ":",
32176cfd
RP		 170 ni->ni_wdsvap->iv_ifp->if_xname);
171 /* XXX stat? */
172 } else {
173 /*
174 * Committed to new node, setup state.
175 */
176 obss = vap->iv_bss;
177 vap->iv_bss = ni;
178 ni->ni_wdsvap = vap;
179 }
32176cfd
RP		 180 if (obss != NULL) {
181 /* NB: deferred to avoid recursive lock */
182 ieee80211_free_node(obss);
183 }
184 } else {
185 /*
186 * Legacy WDS vap setup.
187 */
188 /*
189 * The far end does not associate so we just create
190 * create a new node and install it as the vap's
191 * bss node. We must simulate an association and
192 * authorize the port for traffic to flow.
193 * XXX check if node already in sta table?
194 */
195 ni = ieee80211_node_create_wds(vap, vap->iv_des_bssid, chan);
196 if (ni != NULL) {
197 obss = vap->iv_bss;
198 vap->iv_bss = ieee80211_ref_node(ni);
199 ni->ni_flags |= IEEE80211_NODE_AREF;
200 if (obss != NULL)
201 ieee80211_free_node(obss);
202 /* give driver a chance to setup state like ni_txrate */
203 if (ic->ic_newassoc != NULL)
204 ic->ic_newassoc(ni, 1);
205 /* tell the authenticator about new station */
206 if (vap->iv_auth->ia_node_join != NULL)
207 vap->iv_auth->ia_node_join(ni);
208 if (ni->ni_authmode != IEEE80211_AUTH_8021X)
209 ieee80211_node_authorize(ni);
210
211 ieee80211_notify_node_join(ni, 1 /*newassoc*/);
212 /* XXX inject l2uf frame */
213 }
214 }
215
216 /*
217 * Flush any pending frames now that were setup.
218 */
219 if (ni != NULL)
220 wds_flush(ni);
221 return (ni == NULL ? ENOENT : 0);
222}
223
224/*
225 * Propagate multicast frames of an ap vap to all DWDS links.
226 * The caller is assumed to have verified this frame is multicast.
227 */
228void
229ieee80211_dwds_mcast(struct ieee80211vap *vap0, struct mbuf *m)
230{
231 struct ieee80211com *ic = vap0->iv_ic;
232 struct ifnet *parent = ic->ic_ifp;
233 const struct ether_header *eh = mtod(m, const struct ether_header *);
234 struct ieee80211_node *ni;
235 struct ieee80211vap *vap;
236 struct ifnet *ifp;
237 struct mbuf *mcopy;
238 int err;
239
240 KASSERT(ETHER_IS_MULTICAST(eh->ether_dhost),
6168f72e 241 ("%6D not mcast", eh->ether_dhost, ":"));
32176cfd
RP		 242
243 /* XXX locking */
244 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
245 /* only DWDS vaps are interesting */
246 if (vap->iv_opmode != IEEE80211_M_WDS ||
247 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY))
248 continue;
249 /* if it came in this interface, don't send it back out */
250 ifp = vap->iv_ifp;
251 if (ifp == m->m_pkthdr.rcvif)
252 continue;
253 /*
254 * Duplicate the frame and send it.
255 */
256 mcopy = m_copypacket(m, MB_DONTWAIT);
257 if (mcopy == NULL) {
258 ifp->if_oerrors++;
259 /* XXX stat + msg */
260 continue;
261 }
262 ni = ieee80211_find_txnode(vap, eh->ether_dhost);
263 if (ni == NULL) {
264 /* NB: ieee80211_find_txnode does stat+msg */
265 ifp->if_oerrors++;
266 m_freem(mcopy);
267 continue;
268 }
269 /* calculate priority so drivers can find the tx queue */
270 if (ieee80211_classify(ni, mcopy)) {
271 IEEE80211_DISCARD_MAC(vap,
272 IEEE80211_MSG_OUTPUT | IEEE80211_MSG_WDS,
273 eh->ether_dhost, NULL,
274 "%s", "classification failure");
275 vap->iv_stats.is_tx_classify++;
276 ifp->if_oerrors++;
277 m_freem(mcopy);
278 ieee80211_free_node(ni);
279 continue;
280 }
281
282 BPF_MTAP(ifp, m); /* 802.3 tx */
283
284 /*
285 * Encapsulate the packet in prep for transmission.
286 */
287 mcopy = ieee80211_encap(vap, ni, mcopy);
288 if (mcopy == NULL) {
289 /* NB: stat+msg handled in ieee80211_encap */
290 ieee80211_free_node(ni);
291 continue;
292 }
293 mcopy->m_flags |= M_MCAST;
294 mcopy->m_pkthdr.rcvif = (void *) ni;
295
fcaa651d 296 err = ieee80211_handoff(parent, mcopy);
32176cfd
RP		 297 if (err) {
298 /* NB: IFQ_HANDOFF reclaims mbuf */
299 ifp->if_oerrors++;
300 ieee80211_free_node(ni);
301 } else
302 ifp->if_opackets++;
303 }
304}
305
306/*
307 * Handle DWDS discovery on receipt of a 4-address frame in
308 * ap mode. Queue the frame and post an event for someone
309 * to plumb the necessary WDS vap for this station. Frames
310 * received prior to the vap set running will then be reprocessed
311 * as if they were just received.
312 */
313void
314ieee80211_dwds_discover(struct ieee80211_node *ni, struct mbuf *m)
315{
316 struct ieee80211com *ic = ni->ni_ic;
317
318 /*
319 * Save the frame with an aging interval 4 times
320 * the listen interval specified by the station.
321 * Frames that sit around too long are reclaimed
322 * using this information.
323 * XXX handle overflow?
324 * XXX per/vap beacon interval?
325 */
326 m->m_pkthdr.rcvif = (void *)(uintptr_t)
327 ieee80211_mac_hash(ic, ni->ni_macaddr);
328 (void) ieee80211_ageq_append(&ic->ic_stageq, m,
329 ((ni->ni_intval * ic->ic_lintval) << 2) / 1024);
330 ieee80211_notify_wds_discover(ni);
331}
332
333/*
334 * IEEE80211_M_WDS vap state machine handler.
335 */
336static int
337wds_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
338{
339 struct ieee80211com *ic = vap->iv_ic;
340 struct ieee80211_node *ni;
341 enum ieee80211_state ostate;
342 int error;
343
32176cfd
RP		 344 ostate = vap->iv_state;
345 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s\n", __func__,
346 ieee80211_state_name[ostate], ieee80211_state_name[nstate]);
347 vap->iv_state = nstate; /* state transition */
348 callout_stop(&vap->iv_mgtsend); /* XXX callout_drain */
349 if (ostate != IEEE80211_S_SCAN)
350 ieee80211_cancel_scan(vap); /* background scan */
351 ni = vap->iv_bss; /* NB: no reference held */
352 error = 0;
353 switch (nstate) {
354 case IEEE80211_S_INIT:
355 switch (ostate) {
356 case IEEE80211_S_SCAN:
357 ieee80211_cancel_scan(vap);
358 break;
359 default:
360 break;
361 }
362 if (ostate != IEEE80211_S_INIT) {
363 /* NB: optimize INIT -> INIT case */
364 ieee80211_reset_bss(vap);
365 }
366 break;
367 case IEEE80211_S_SCAN:
368 switch (ostate) {
369 case IEEE80211_S_INIT:
370 ieee80211_check_scan_current(vap);
371 break;
372 default:
373 break;
374 }
375 break;
376 case IEEE80211_S_RUN:
377 if (ostate == IEEE80211_S_INIT) {
378 /*
379 * Already have a channel; bypass the scan
380 * and startup immediately.
381 */
382 error = ieee80211_create_wds(vap, ic->ic_curchan);
383 }
384 break;
385 default:
386 break;
387 }
388 return error;
389}
390
391/*
392 * Process a received frame. The node associated with the sender
393 * should be supplied. If nothing was found in the node table then
394 * the caller is assumed to supply a reference to iv_bss instead.
395 * The RSSI and a timestamp are also supplied. The RSSI data is used
396 * during AP scanning to select a AP to associate with; it can have
397 * any units so long as values have consistent units and higher values
398 * mean ``better signal''. The receive timestamp is currently not used
399 * by the 802.11 layer.
400 */
401static int
402wds_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf)
403{
404#define SEQ_LEQ(a,b) ((int)((a)-(b)) <= 0)
405#define HAS_SEQ(type) ((type & 0x4) == 0)
406 struct ieee80211vap *vap = ni->ni_vap;
407 struct ieee80211com *ic = ni->ni_ic;
408 struct ifnet *ifp = vap->iv_ifp;
409 struct ieee80211_frame *wh;
410 struct ieee80211_key *key;
411 struct ether_header *eh;
412 int hdrspace, need_tap = 1; /* mbuf need to be tapped. */
413 uint8_t dir, type, subtype, qos;
414 uint16_t rxseq;
415
416 if (m->m_flags & M_AMPDU_MPDU) {
417 /*
418 * Fastpath for A-MPDU reorder q resubmission. Frames
419 * w/ M_AMPDU_MPDU marked have already passed through
420 * here but were received out of order and been held on
421 * the reorder queue. When resubmitted they are marked
422 * with the M_AMPDU_MPDU flag and we can bypass most of
423 * the normal processing.
424 */
425 wh = mtod(m, struct ieee80211_frame *);
426 type = IEEE80211_FC0_TYPE_DATA;
427 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
428 subtype = IEEE80211_FC0_SUBTYPE_QOS;
429 hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */
430 goto resubmit_ampdu;
431 }
432
433 KASSERT(ni != NULL, ("null node"));
434
435 type = -1; /* undefined */
436
437 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
438 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
439 ni->ni_macaddr, NULL,
440 "too short (1): len %u", m->m_pkthdr.len);
441 vap->iv_stats.is_rx_tooshort++;
442 goto out;
443 }
444 /*
445 * Bit of a cheat here, we use a pointer for a 3-address
446 * frame format but don't reference fields past outside
447 * ieee80211_frame_min w/o first validating the data is
448 * present.
449 */
450 wh = mtod(m, struct ieee80211_frame *);
451
452 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
453 IEEE80211_FC0_VERSION_0) {
454 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
455 ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x",
456 wh->i_fc[0], wh->i_fc[1]);
457 vap->iv_stats.is_rx_badversion++;
458 goto err;
459 }
460
461 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
462 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
463 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
464
465 /* NB: WDS vap's do not scan */
466 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_addr4)) {
467 IEEE80211_DISCARD_MAC(vap,
468 IEEE80211_MSG_ANY, ni->ni_macaddr, NULL,
469 "too short (3): len %u", m->m_pkthdr.len);
470 vap->iv_stats.is_rx_tooshort++;
471 goto out;
472 }
473 /* NB: the TA is implicitly verified by finding the wds peer node */
474 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr) &&
475 !IEEE80211_ADDR_EQ(wh->i_addr1, ifp->if_broadcastaddr)) {
476 /* not interested in */
477 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
478 wh->i_addr1, NULL, "%s", "not to bss");
479 vap->iv_stats.is_rx_wrongbss++;
480 goto out;
481 }
482 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
483 ni->ni_noise = nf;
484 if (HAS_SEQ(type)) {
485 uint8_t tid = ieee80211_gettid(wh);
486 if (IEEE80211_QOS_HAS_SEQ(wh) &&
487 TID_TO_WME_AC(tid) >= WME_AC_VI)
488 ic->ic_wme.wme_hipri_traffic++;
489 rxseq = le16toh(*(uint16_t *)wh->i_seq);
490 if ((ni->ni_flags & IEEE80211_NODE_HT) == 0 &&
491 (wh->i_fc[1] & IEEE80211_FC1_RETRY) &&
492 SEQ_LEQ(rxseq, ni->ni_rxseqs[tid])) {
493 /* duplicate, discard */
494 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
495 wh->i_addr1, "duplicate",
496 "seqno <%u,%u> fragno <%u,%u> tid %u",
497 rxseq >> IEEE80211_SEQ_SEQ_SHIFT,
498 ni->ni_rxseqs[tid] >> IEEE80211_SEQ_SEQ_SHIFT,
499 rxseq & IEEE80211_SEQ_FRAG_MASK,
500 ni->ni_rxseqs[tid] & IEEE80211_SEQ_FRAG_MASK,
501 tid);
502 vap->iv_stats.is_rx_dup++;
503 IEEE80211_NODE_STAT(ni, rx_dup);
504 goto out;
505 }
506 ni->ni_rxseqs[tid] = rxseq;
507 }
508 switch (type) {
509 case IEEE80211_FC0_TYPE_DATA:
510 hdrspace = ieee80211_hdrspace(ic, wh);
511 if (m->m_len < hdrspace &&
512 (m = m_pullup(m, hdrspace)) == NULL) {
513 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
514 ni->ni_macaddr, NULL,
515 "data too short: expecting %u", hdrspace);
516 vap->iv_stats.is_rx_tooshort++;
517 goto out; /* XXX */
518 }
519 if (dir != IEEE80211_FC1_DIR_DSTODS) {
520 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
521 wh, "data", "incorrect dir 0x%x", dir);
522 vap->iv_stats.is_rx_wrongdir++;
523 goto out;
524 }
525 /*
526 * Only legacy WDS traffic should take this path.
527 */
528 if ((vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0) {
529 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
530 wh, "data", "%s", "not legacy wds");
531 vap->iv_stats.is_rx_wrongdir++;/*XXX*/
532 goto out;
533 }
534 if (!IEEE80211_IS_MULTICAST(wh->i_addr1))
535 ni->ni_inact = ni->ni_inact_reload;
536 /*
537 * Handle A-MPDU re-ordering. If the frame is to be
538 * processed directly then ieee80211_ampdu_reorder
539 * will return 0; otherwise it has consumed the mbuf
540 * and we should do nothing more with it.
541 */
542 if ((m->m_flags & M_AMPDU) &&
543 ieee80211_ampdu_reorder(ni, m) != 0) {
544 m = NULL;
545 goto out;
546 }
547 resubmit_ampdu:
548
549 /*
550 * Handle privacy requirements. Note that we
551 * must not be preempted from here until after
552 * we (potentially) call ieee80211_crypto_demic;
553 * otherwise we may violate assumptions in the
554 * crypto cipher modules used to do delayed update
555 * of replay sequence numbers.
556 */
557 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
558 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
559 /*
560 * Discard encrypted frames when privacy is off.
561 */
562 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
563 wh, "WEP", "%s", "PRIVACY off");
564 vap->iv_stats.is_rx_noprivacy++;
565 IEEE80211_NODE_STAT(ni, rx_noprivacy);
566 goto out;
567 }
568 key = ieee80211_crypto_decap(ni, m, hdrspace);
569 if (key == NULL) {
570 /* NB: stats+msgs handled in crypto_decap */
571 IEEE80211_NODE_STAT(ni, rx_wepfail);
572 goto out;
573 }
574 wh = mtod(m, struct ieee80211_frame *);
575 wh->i_fc[1] &= ~IEEE80211_FC1_WEP;
576 } else {
577 /* XXX M_WEP and IEEE80211_F_PRIVACY */
578 key = NULL;
579 }
580
581 /*
582 * Save QoS bits for use below--before we strip the header.
583 */
584 if (subtype == IEEE80211_FC0_SUBTYPE_QOS) {
585 qos = (dir == IEEE80211_FC1_DIR_DSTODS) ?
586 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] :
587 ((struct ieee80211_qosframe *)wh)->i_qos[0];
588 } else
589 qos = 0;
590
591 /*
592 * Next up, any fragmentation.
593 */
594 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
595 m = ieee80211_defrag(ni, m, hdrspace);
596 if (m == NULL) {
597 /* Fragment dropped or frame not complete yet */
598 goto out;
599 }
600 }
601 wh = NULL; /* no longer valid, catch any uses */
602
603 /*
604 * Next strip any MSDU crypto bits.
605 */
606 if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) {
607 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
608 ni->ni_macaddr, "data", "%s", "demic error");
609 vap->iv_stats.is_rx_demicfail++;
610 IEEE80211_NODE_STAT(ni, rx_demicfail);
611 goto out;
612 }
613
614 /* copy to listener after decrypt */
615 if (ieee80211_radiotap_active_vap(vap))
616 ieee80211_radiotap_rx(vap, m);
617 need_tap = 0;
618
619 /*
620 * Finally, strip the 802.11 header.
621 */
622 m = ieee80211_decap(vap, m, hdrspace);
623 if (m == NULL) {
624 /* XXX mask bit to check for both */
625 /* don't count Null data frames as errors */
626 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
627 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
628 goto out;
629 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
630 ni->ni_macaddr, "data", "%s", "decap error");
631 vap->iv_stats.is_rx_decap++;
632 IEEE80211_NODE_STAT(ni, rx_decap);
633 goto err;
634 }
635 eh = mtod(m, struct ether_header *);
636 if (!ieee80211_node_is_authorized(ni)) {
637 /*
638 * Deny any non-PAE frames received prior to
639 * authorization. For open/shared-key
640 * authentication the port is mark authorized
641 * after authentication completes. For 802.1x
642 * the port is not marked authorized by the
643 * authenticator until the handshake has completed.
644 */
645 if (eh->ether_type != htons(ETHERTYPE_PAE)) {
646 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
647 eh->ether_shost, "data",
648 "unauthorized port: ether type 0x%x len %u",
649 eh->ether_type, m->m_pkthdr.len);
650 vap->iv_stats.is_rx_unauth++;
651 IEEE80211_NODE_STAT(ni, rx_unauth);
652 goto err;
653 }
654 } else {
655 /*
656 * When denying unencrypted frames, discard
657 * any non-PAE frames received without encryption.
658 */
659 if ((vap->iv_flags & IEEE80211_F_DROPUNENC) &&
660 (key == NULL && (m->m_flags & M_WEP) == 0) &&
661 eh->ether_type != htons(ETHERTYPE_PAE)) {
662 /*
663 * Drop unencrypted frames.
664 */
665 vap->iv_stats.is_rx_unencrypted++;
666 IEEE80211_NODE_STAT(ni, rx_unencrypted);
667 goto out;
668 }
669 }
670 /* XXX require HT? */
671 if (qos & IEEE80211_QOS_AMSDU) {
672 m = ieee80211_decap_amsdu(ni, m);
673 if (m == NULL)
674 return IEEE80211_FC0_TYPE_DATA;
675 } else {
676#ifdef IEEE80211_SUPPORT_SUPERG
677 m = ieee80211_decap_fastframe(vap, ni, m);
678 if (m == NULL)
679 return IEEE80211_FC0_TYPE_DATA;
680#endif
681 }
682 ieee80211_deliver_data(vap, ni, m);
683 return IEEE80211_FC0_TYPE_DATA;
684
685 case IEEE80211_FC0_TYPE_MGT:
686 vap->iv_stats.is_rx_mgmt++;
687 IEEE80211_NODE_STAT(ni, rx_mgmt);
688 if (dir != IEEE80211_FC1_DIR_NODS) {
689 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
690 wh, "data", "incorrect dir 0x%x", dir);
691 vap->iv_stats.is_rx_wrongdir++;
692 goto err;
693 }
694 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
695 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
696 ni->ni_macaddr, "mgt", "too short: len %u",
697 m->m_pkthdr.len);
698 vap->iv_stats.is_rx_tooshort++;
699 goto out;
700 }
701#ifdef IEEE80211_DEBUG
702 if (ieee80211_msg_debug(vap) || ieee80211_msg_dumppkts(vap)) {
6168f72e 703 if_printf(ifp, "received %s from %6D rssi %d\n",
32176cfd
RP		 704 ieee80211_mgt_subtype_name[subtype >>
705 IEEE80211_FC0_SUBTYPE_SHIFT],
6168f72e 706 wh->i_addr2, ":", rssi);
32176cfd
RP		 707 }
708#endif
709 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
710 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
711 wh, NULL, "%s", "WEP set but not permitted");
712 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
713 goto out;
714 }
715 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf);
716 goto out;
717
718 case IEEE80211_FC0_TYPE_CTL:
719 vap->iv_stats.is_rx_ctl++;
720 IEEE80211_NODE_STAT(ni, rx_ctrl);
721 goto out;
722
723 default:
724 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
725 wh, "bad", "frame type 0x%x", type);
726 /* should not come here */
727 break;
728 }
729err:
730 ifp->if_ierrors++;
731out:
732 if (m != NULL) {
733 if (need_tap && ieee80211_radiotap_active_vap(vap))
734 ieee80211_radiotap_rx(vap, m);
735 m_freem(m);
736 }
737 return type;
738#undef SEQ_LEQ
739}
740
741static void
742wds_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0,
743 int subtype, int rssi, int nf)
744{
745 struct ieee80211vap *vap = ni->ni_vap;
746 struct ieee80211com *ic = ni->ni_ic;
747 struct ieee80211_frame *wh;
748 u_int8_t *frm, *efrm;
749
750 wh = mtod(m0, struct ieee80211_frame *);
751 frm = (u_int8_t *)&wh[1];
752 efrm = mtod(m0, u_int8_t *) + m0->m_len;
753 switch (subtype) {
754 case IEEE80211_FC0_SUBTYPE_DEAUTH:
755 case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
756 case IEEE80211_FC0_SUBTYPE_BEACON:
757 case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
758 case IEEE80211_FC0_SUBTYPE_AUTH:
759 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
760 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
761 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
762 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
763 case IEEE80211_FC0_SUBTYPE_DISASSOC:
764 vap->iv_stats.is_rx_mgtdiscard++;
765 break;
766 case IEEE80211_FC0_SUBTYPE_ACTION:
767 if (vap->iv_state != IEEE80211_S_RUN ||
768 IEEE80211_IS_MULTICAST(wh->i_addr1)) {
769 vap->iv_stats.is_rx_mgtdiscard++;
770 break;
771 }
772 ni->ni_inact = ni->ni_inact_reload;
773 if (ieee80211_parse_action(ni, m0) == 0)
774 ic->ic_recv_action(ni, wh, frm, efrm);
775 break;
776 default:
777 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
778 wh, "mgt", "subtype 0x%x not handled", subtype);
779 vap->iv_stats.is_rx_badsubtype++;
780 break;
781 }
782}
DragonFly Project GIT Source repo