wlan - Rip out all wlan locks part 1/2
[dragonfly.git] / sys / netproto / 802_11 / wlan / ieee80211_input.c
CommitLineData
32176cfd 1/*-
f186073c 2 * Copyright (c) 2001 Atsushi Onoe
32176cfd 3 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
f186073c
JS
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
f186073c
JS
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
4028af95 26 * $FreeBSD: head/sys/net80211/ieee80211_input.c 205986 2010-03-31 16:07:36Z rpaulo $
32176cfd 27 * $DragonFly$
f186073c
JS
28 */
29
32176cfd
RP
30#include "opt_wlan.h"
31
f186073c 32#include <sys/param.h>
841ab66c 33#include <sys/systm.h>
f186073c
JS
34#include <sys/mbuf.h>
35#include <sys/malloc.h>
841ab66c 36#include <sys/endian.h>
f186073c 37#include <sys/kernel.h>
841ab66c 38
f186073c 39#include <sys/socket.h>
32176cfd 40
f186073c 41#include <net/ethernet.h>
32176cfd 42#include <net/if.h>
f186073c 43#include <net/if_llc.h>
32176cfd
RP
44#include <net/if_media.h>
45#include <net/route.h>
f186073c
JS
46
47#include <netproto/802_11/ieee80211_var.h>
32176cfd
RP
48#include <netproto/802_11/ieee80211_input.h>
49#ifdef IEEE80211_SUPPORT_MESH
50#include <netproto/802_11/ieee80211_mesh.h>
51#endif
f186073c
JS
52
53#include <net/bpf.h>
54
32176cfd
RP
55#ifdef INET
56#include <netinet/in.h>
57#include <net/ethernet.h>
58#endif
6bd66811
SZ
59
60int
32176cfd 61ieee80211_input_all(struct ieee80211com *ic, struct mbuf *m, int rssi, int nf)
6bd66811 62{
32176cfd
RP
63 struct ieee80211vap *vap;
64 int type = -1;
841ab66c 65
32176cfd 66 m->m_flags |= M_BCAST; /* NB: mark for bpf tap'ing */
841ab66c 67
32176cfd
RP
68 /* XXX locking */
69 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
70 struct ieee80211_node *ni;
71 struct mbuf *mcopy;
1f8e62c9 72
32176cfd
RP
73 /* NB: could check for IFF_UP but this is cheaper */
74 if (vap->iv_state == IEEE80211_S_INIT)
75 continue;
841ab66c 76 /*
32176cfd
RP
77 * WDS vap's only receive directed traffic from the
78 * station at the ``far end''. That traffic should
79 * be passed through the AP vap the station is associated
80 * to--so don't spam them with mcast frames.
841ab66c 81 */
32176cfd
RP
82 if (vap->iv_opmode == IEEE80211_M_WDS)
83 continue;
84 if (TAILQ_NEXT(vap, iv_next) != NULL) {
841ab66c 85 /*
32176cfd
RP
86 * Packet contents are changed by ieee80211_decap
87 * so do a deep copy of the packet.
841ab66c 88 */
32176cfd
RP
89 mcopy = m_dup(m, MB_DONTWAIT);
90 if (mcopy == NULL) {
91 /* XXX stat+msg */
92 continue;
f186073c 93 }
841ab66c 94 } else {
32176cfd
RP
95 mcopy = m;
96 m = NULL;
841ab66c 97 }
32176cfd
RP
98 ni = ieee80211_ref_node(vap->iv_bss);
99 type = ieee80211_input(ni, mcopy, rssi, nf);
100 ieee80211_free_node(ni);
f186073c 101 }
32176cfd 102 if (m != NULL) /* no vaps, reclaim mbuf */
841ab66c 103 m_freem(m);
841ab66c 104 return type;
841ab66c
SZ
105}
106
107/*
32176cfd
RP
108 * This function reassembles fragments.
109 *
110 * XXX should handle 3 concurrent reassemblies per-spec.
841ab66c 111 */
32176cfd
RP
112struct mbuf *
113ieee80211_defrag(struct ieee80211_node *ni, struct mbuf *m, int hdrspace)
841ab66c 114{
32176cfd 115 struct ieee80211vap *vap = ni->ni_vap;
841ab66c
SZ
116 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
117 struct ieee80211_frame *lwh;
118 uint16_t rxseq;
119 uint8_t fragno;
120 uint8_t more_frag = wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG;
121 struct mbuf *mfrag;
122
123 KASSERT(!IEEE80211_IS_MULTICAST(wh->i_addr1), ("multicast fragm?"));
124
125 rxseq = le16toh(*(uint16_t *)wh->i_seq);
126 fragno = rxseq & IEEE80211_SEQ_FRAG_MASK;
127
128 /* Quick way out, if there's nothing to defragment */
129 if (!more_frag && fragno == 0 && ni->ni_rxfrag[0] == NULL)
130 return m;
131
132 /*
133 * Remove frag to insure it doesn't get reaped by timer.
134 */
135 if (ni->ni_table == NULL) {
136 /*
137 * Should never happen. If the node is orphaned (not in
138 * the table) then input packets should not reach here.
139 * Otherwise, a concurrent request that yanks the table
140 * should be blocked by other interlocking and/or by first
141 * shutting the driver down. Regardless, be defensive
142 * here and just bail
143 */
144 /* XXX need msg+stat */
145 m_freem(m);
146 return NULL;
147 }
148 mfrag = ni->ni_rxfrag[0];
149 ni->ni_rxfrag[0] = NULL;
150
151 /*
152 * Validate new fragment is in order and
153 * related to the previous ones.
154 */
155 if (mfrag != NULL) {
156 uint16_t last_rxseq;
157
158 lwh = mtod(mfrag, struct ieee80211_frame *);
159 last_rxseq = le16toh(*(uint16_t *)lwh->i_seq);
160 /* NB: check seq # and frag together */
161 if (rxseq != last_rxseq+1 ||
162 !IEEE80211_ADDR_EQ(wh->i_addr1, lwh->i_addr1) ||
163 !IEEE80211_ADDR_EQ(wh->i_addr2, lwh->i_addr2)) {
164 /*
165 * Unrelated fragment or no space for it,
166 * clear current fragments.
167 */
168 m_freem(mfrag);
169 mfrag = NULL;
170 }
171 }
172
173 if (mfrag == NULL) {
174 if (fragno != 0) { /* !first fragment, discard */
32176cfd 175 vap->iv_stats.is_rx_defrag++;
841ab66c
SZ
176 IEEE80211_NODE_STAT(ni, rx_defrag);
177 m_freem(m);
178 return NULL;
179 }
180 mfrag = m;
181 } else { /* concatenate */
182 m_adj(m, hdrspace); /* strip header */
183 m_cat(mfrag, m);
184 /* NB: m_cat doesn't update the packet header */
185 mfrag->m_pkthdr.len += m->m_pkthdr.len;
186 /* track last seqnum and fragno */
187 lwh = mtod(mfrag, struct ieee80211_frame *);
188 *(uint16_t *) lwh->i_seq = *(uint16_t *) wh->i_seq;
189 }
190 if (more_frag) { /* more to come, save */
191 ni->ni_rxfragstamp = ticks;
192 ni->ni_rxfrag[0] = mfrag;
193 mfrag = NULL;
194 }
195 return mfrag;
196}
197
32176cfd
RP
198void
199ieee80211_deliver_data(struct ieee80211vap *vap,
841ab66c
SZ
200 struct ieee80211_node *ni, struct mbuf *m)
201{
202 struct ether_header *eh = mtod(m, struct ether_header *);
32176cfd 203 struct ifnet *ifp = vap->iv_ifp;
841ab66c 204
32176cfd
RP
205 /* clear driver/net80211 flags before passing up */
206 m->m_flags &= ~(M_80211_RX | M_MCAST | M_BCAST);
207
208 /* NB: see hostap_deliver_data, this path doesn't handle hostap */
209 KASSERT(vap->iv_opmode != IEEE80211_M_HOSTAP, ("gack, hostap"));
ffd45d58
SZ
210 /*
211 * Do accounting.
212 */
213 ifp->if_ipackets++;
214 IEEE80211_NODE_STAT(ni, rx_data);
215 IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len);
216 if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
32176cfd 217 m->m_flags |= M_MCAST; /* XXX M_BCAST? */
ffd45d58 218 IEEE80211_NODE_STAT(ni, rx_mcast);
32176cfd 219 } else
ffd45d58 220 IEEE80211_NODE_STAT(ni, rx_ucast);
32176cfd 221 m->m_pkthdr.rcvif = ifp;
841ab66c 222
32176cfd
RP
223 if (ni->ni_vlan != 0) {
224 /* attach vlan tag */
225 m->m_pkthdr.ether_vlantag = ni->ni_vlan;
226 m->m_flags |= M_VLANTAG;
f186073c 227 }
32176cfd 228 ifp->if_input(ifp, m);
f186073c
JS
229}
230
32176cfd
RP
231struct mbuf *
232ieee80211_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen)
f186073c 233{
32176cfd 234 struct ieee80211_qosframe_addr4 wh;
f186073c 235 struct ether_header *eh;
f186073c
JS
236 struct llc *llc;
237
32176cfd
RP
238 KASSERT(hdrlen <= sizeof(wh),
239 ("hdrlen %d > max %zd", hdrlen, sizeof(wh)));
240
841ab66c
SZ
241 if (m->m_len < hdrlen + sizeof(*llc) &&
242 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
32176cfd
RP
243 vap->iv_stats.is_rx_tooshort++;
244 /* XXX msg */
841ab66c 245 return NULL;
f186073c 246 }
841ab66c
SZ
247 memcpy(&wh, mtod(m, caddr_t), hdrlen);
248 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
f186073c
JS
249 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
250 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
32176cfd
RP
251 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
252 /* NB: preserve AppleTalk frames that have a native SNAP hdr */
253 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
254 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
841ab66c 255 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
f186073c
JS
256 llc = NULL;
257 } else {
841ab66c 258 m_adj(m, hdrlen - sizeof(*eh));
f186073c
JS
259 }
260 eh = mtod(m, struct ether_header *);
261 switch (wh.i_fc[1] & IEEE80211_FC1_DIR_MASK) {
262 case IEEE80211_FC1_DIR_NODS:
263 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr1);
264 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr2);
265 break;
266 case IEEE80211_FC1_DIR_TODS:
267 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr3);
268 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr2);
269 break;
270 case IEEE80211_FC1_DIR_FROMDS:
271 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr1);
272 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr3);
273 break;
274 case IEEE80211_FC1_DIR_DSTODS:
841ab66c
SZ
275 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr3);
276 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr4);
277 break;
f186073c
JS
278 }
279#ifdef ALIGNED_POINTER
280 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
32176cfd
RP
281 m = ieee80211_realign(vap, m, sizeof(*eh));
282 if (m == NULL)
283 return NULL;
f186073c
JS
284 }
285#endif /* ALIGNED_POINTER */
286 if (llc != NULL) {
287 eh = mtod(m, struct ether_header *);
288 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
289 }
290 return m;
291}
292
293/*
32176cfd
RP
294 * Decap a frame encapsulated in a fast-frame/A-MSDU.
295 */
296struct mbuf *
297ieee80211_decap1(struct mbuf *m, int *framelen)
298{
299#define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc))
300 struct ether_header *eh;
301 struct llc *llc;
302
303 /*
304 * The frame has an 802.3 header followed by an 802.2
305 * LLC header. The encapsulated frame length is in the
306 * first header type field; save that and overwrite it
307 * with the true type field found in the second. Then
308 * copy the 802.3 header up to where it belongs and
309 * adjust the mbuf contents to remove the void.
310 */
311 if (m->m_len < FF_LLC_SIZE && (m = m_pullup(m, FF_LLC_SIZE)) == NULL)
312 return NULL;
313 eh = mtod(m, struct ether_header *); /* 802.3 header is first */
314 llc = (struct llc *)&eh[1]; /* 802.2 header follows */
315 *framelen = ntohs(eh->ether_type) /* encap'd frame size */
316 + sizeof(struct ether_header) - sizeof(struct llc);
317 eh->ether_type = llc->llc_un.type_snap.ether_type;
318 ovbcopy(eh, mtod(m, uint8_t *) + sizeof(struct llc),
319 sizeof(struct ether_header));
320 m_adj(m, sizeof(struct llc));
321 return m;
322#undef FF_LLC_SIZE
323}
324
325/*
f186073c
JS
326 * Install received rate set information in the node's state block.
327 */
841ab66c
SZ
328int
329ieee80211_setup_rates(struct ieee80211_node *ni,
32176cfd 330 const uint8_t *rates, const uint8_t *xrates, int flags)
f186073c 331{
32176cfd 332 struct ieee80211vap *vap = ni->ni_vap;
f186073c
JS
333 struct ieee80211_rateset *rs = &ni->ni_rates;
334
335 memset(rs, 0, sizeof(*rs));
336 rs->rs_nrates = rates[1];
337 memcpy(rs->rs_rates, rates + 2, rs->rs_nrates);
338 if (xrates != NULL) {
339 uint8_t nxrates;
340 /*
341 * Tack on 11g extended supported rate element.
342 */
343 nxrates = xrates[1];
344 if (rs->rs_nrates + nxrates > IEEE80211_RATE_MAXSIZE) {
345 nxrates = IEEE80211_RATE_MAXSIZE - rs->rs_nrates;
32176cfd
RP
346 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE, ni,
347 "extended rate set too large; only using "
348 "%u of %u rates", nxrates, xrates[1]);
349 vap->iv_stats.is_rx_rstoobig++;
f186073c
JS
350 }
351 memcpy(rs->rs_rates + rs->rs_nrates, xrates+2, nxrates);
352 rs->rs_nrates += nxrates;
353 }
32176cfd 354 return ieee80211_fix_rate(ni, rs, flags);
841ab66c
SZ
355}
356
357/*
358 * Send a management frame error response to the specified
359 * station. If ni is associated with the station then use
360 * it; otherwise allocate a temporary node suitable for
361 * transmitting the frame and then free the reference so
362 * it will go away as soon as the frame has been transmitted.
363 */
32176cfd
RP
364void
365ieee80211_send_error(struct ieee80211_node *ni,
366 const uint8_t mac[IEEE80211_ADDR_LEN], int subtype, int arg)
841ab66c 367{
32176cfd 368 struct ieee80211vap *vap = ni->ni_vap;
841ab66c
SZ
369 int istmp;
370
32176cfd
RP
371 if (ni == vap->iv_bss) {
372 if (vap->iv_state != IEEE80211_S_RUN) {
373 /*
374 * XXX hack until we get rid of this routine.
375 * We can be called prior to the vap reaching
376 * run state under certain conditions in which
377 * case iv_bss->ni_chan will not be setup.
378 * Check for this explicitly and and just ignore
379 * the request.
380 */
381 return;
382 }
383 ni = ieee80211_tmp_node(vap, mac);
841ab66c
SZ
384 if (ni == NULL) {
385 /* XXX msg */
386 return;
387 }
388 istmp = 1;
389 } else
390 istmp = 0;
32176cfd 391 IEEE80211_SEND_MGMT(ni, subtype, arg);
841ab66c
SZ
392 if (istmp)
393 ieee80211_free_node(ni);
394}
395
32176cfd
RP
396int
397ieee80211_alloc_challenge(struct ieee80211_node *ni)
841ab66c
SZ
398{
399 if (ni->ni_challenge == NULL)
32176cfd 400 ni->ni_challenge = (uint32_t *) kmalloc(IEEE80211_CHALLENGE_LEN,
fcaa651d 401 M_80211_NODE, M_INTWAIT);
841ab66c 402 if (ni->ni_challenge == NULL) {
32176cfd
RP
403 IEEE80211_NOTE(ni->ni_vap,
404 IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni,
405 "%s", "shared key challenge alloc failed");
841ab66c
SZ
406 /* XXX statistic */
407 }
408 return (ni->ni_challenge != NULL);
409}
410
32176cfd
RP
411/*
412 * Parse a Beacon or ProbeResponse frame and return the
413 * useful information in an ieee80211_scanparams structure.
414 * Status is set to 0 if no problems were found; otherwise
415 * a bitmask of IEEE80211_BPARSE_* items is returned that
416 * describes the problems detected.
417 */
418int
419ieee80211_parse_beacon(struct ieee80211_node *ni, struct mbuf *m,
420 struct ieee80211_scanparams *scan)
841ab66c 421{
32176cfd
RP
422 struct ieee80211vap *vap = ni->ni_vap;
423 struct ieee80211com *ic = ni->ni_ic;
424 struct ieee80211_frame *wh;
425 uint8_t *frm, *efrm;
841ab66c 426
32176cfd
RP
427 wh = mtod(m, struct ieee80211_frame *);
428 frm = (uint8_t *)&wh[1];
429 efrm = mtod(m, uint8_t *) + m->m_len;
430 scan->status = 0;
841ab66c 431 /*
32176cfd
RP
432 * beacon/probe response frame format
433 * [8] time stamp
434 * [2] beacon interval
435 * [2] capability information
436 * [tlv] ssid
437 * [tlv] supported rates
438 * [tlv] country information
439 * [tlv] channel switch announcement (CSA)
440 * [tlv] parameter set (FH/DS)
441 * [tlv] erp information
442 * [tlv] extended supported rates
443 * [tlv] WME
444 * [tlv] WPA or RSN
445 * [tlv] HT capabilities
446 * [tlv] HT information
447 * [tlv] Atheros capabilities
448 * [tlv] Mesh ID
449 * [tlv] Mesh Configuration
841ab66c 450 */
32176cfd
RP
451 IEEE80211_VERIFY_LENGTH(efrm - frm, 12,
452 return (scan->status = IEEE80211_BPARSE_BADIELEN));
453 memset(scan, 0, sizeof(*scan));
454 scan->tstamp = frm; frm += 8;
455 scan->bintval = le16toh(*(uint16_t *)frm); frm += 2;
456 scan->capinfo = le16toh(*(uint16_t *)frm); frm += 2;
457 scan->bchan = ieee80211_chan2ieee(ic, ic->ic_curchan);
458 scan->chan = scan->bchan;
459 scan->ies = frm;
460 scan->ies_len = efrm - frm;
461
462 while (efrm - frm > 1) {
463 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2,
464 return (scan->status = IEEE80211_BPARSE_BADIELEN));
465 switch (*frm) {
466 case IEEE80211_ELEMID_SSID:
467 scan->ssid = frm;
468 break;
469 case IEEE80211_ELEMID_RATES:
470 scan->rates = frm;
471 break;
472 case IEEE80211_ELEMID_COUNTRY:
473 scan->country = frm;
474 break;
475 case IEEE80211_ELEMID_CSA:
476 scan->csa = frm;
477 break;
478 case IEEE80211_ELEMID_FHPARMS:
479 if (ic->ic_phytype == IEEE80211_T_FH) {
480 scan->fhdwell = LE_READ_2(&frm[2]);
481 scan->chan = IEEE80211_FH_CHAN(frm[4], frm[5]);
482 scan->fhindex = frm[6];
841ab66c 483 }
32176cfd
RP
484 break;
485 case IEEE80211_ELEMID_DSPARMS:
841ab66c 486 /*
32176cfd
RP
487 * XXX hack this since depending on phytype
488 * is problematic for multi-mode devices.
841ab66c 489 */
32176cfd
RP
490 if (ic->ic_phytype != IEEE80211_T_FH)
491 scan->chan = frm[2];
841ab66c 492 break;
32176cfd
RP
493 case IEEE80211_ELEMID_TIM:
494 /* XXX ATIM? */
495 scan->tim = frm;
496 scan->timoff = frm - mtod(m, uint8_t *);
497 break;
498 case IEEE80211_ELEMID_IBSSPARMS:
499 case IEEE80211_ELEMID_CFPARMS:
500 case IEEE80211_ELEMID_PWRCNSTR:
501 /* NB: avoid debugging complaints */
502 break;
503 case IEEE80211_ELEMID_XRATES:
504 scan->xrates = frm;
505 break;
506 case IEEE80211_ELEMID_ERP:
507 if (frm[1] != 1) {
508 IEEE80211_DISCARD_IE(vap,
509 IEEE80211_MSG_ELEMID, wh, "ERP",
510 "bad len %u", frm[1]);
511 vap->iv_stats.is_rx_elem_toobig++;
512 break;
841ab66c 513 }
32176cfd
RP
514 scan->erp = frm[2] | 0x100;
515 break;
516 case IEEE80211_ELEMID_HTCAP:
517 scan->htcap = frm;
518 break;
519 case IEEE80211_ELEMID_RSN:
520 scan->rsn = frm;
521 break;
522 case IEEE80211_ELEMID_HTINFO:
523 scan->htinfo = frm;
524 break;
525#ifdef IEEE80211_SUPPORT_MESH
526 case IEEE80211_ELEMID_MESHID:
527 scan->meshid = frm;
528 break;
529 case IEEE80211_ELEMID_MESHCONF:
530 scan->meshconf = frm;
531 break;
532#endif
533 case IEEE80211_ELEMID_VENDOR:
534 if (iswpaoui(frm))
535 scan->wpa = frm;
536 else if (iswmeparam(frm) || iswmeinfo(frm))
537 scan->wme = frm;
538#ifdef IEEE80211_SUPPORT_SUPERG
539 else if (isatherosoui(frm))
540 scan->ath = frm;
541#endif
542#ifdef IEEE80211_SUPPORT_TDMA
543 else if (istdmaoui(frm))
544 scan->tdma = frm;
545#endif
546 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) {
547 /*
548 * Accept pre-draft HT ie's if the
549 * standard ones have not been seen.
550 */
551 if (ishtcapoui(frm)) {
552 if (scan->htcap == NULL)
553 scan->htcap = frm;
554 } else if (ishtinfooui(frm)) {
555 if (scan->htinfo == NULL)
556 scan->htcap = frm;
557 }
841ab66c 558 }
841ab66c
SZ
559 break;
560 default:
32176cfd
RP
561 IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID,
562 wh, "unhandled",
563 "id %u, len %u", *frm, frm[1]);
564 vap->iv_stats.is_rx_elem_unknown++;
565 break;
841ab66c 566 }
32176cfd 567 frm += frm[1] + 2;
841ab66c 568 }
32176cfd
RP
569 IEEE80211_VERIFY_ELEMENT(scan->rates, IEEE80211_RATE_MAXSIZE,
570 scan->status |= IEEE80211_BPARSE_RATES_INVALID);
571 if (scan->rates != NULL && scan->xrates != NULL) {
841ab66c 572 /*
32176cfd
RP
573 * NB: don't process XRATES if RATES is missing. This
574 * avoids a potential null ptr deref and should be ok
575 * as the return code will already note RATES is missing
576 * (so callers shouldn't otherwise process the frame).
841ab66c 577 */
32176cfd
RP
578 IEEE80211_VERIFY_ELEMENT(scan->xrates,
579 IEEE80211_RATE_MAXSIZE - scan->rates[1],
580 scan->status |= IEEE80211_BPARSE_XRATES_INVALID);
841ab66c 581 }
32176cfd
RP
582 IEEE80211_VERIFY_ELEMENT(scan->ssid, IEEE80211_NWID_LEN,
583 scan->status |= IEEE80211_BPARSE_SSID_INVALID);
584 if (scan->chan != scan->bchan && ic->ic_phytype != IEEE80211_T_FH) {
585 /*
586 * Frame was received on a channel different from the
587 * one indicated in the DS params element id;
588 * silently discard it.
589 *
590 * NB: this can happen due to signal leakage.
591 * But we should take it for FH phy because
592 * the rssi value should be correct even for
593 * different hop pattern in FH.
594 */
595 IEEE80211_DISCARD(vap,
596 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
597 wh, NULL, "for off-channel %u", scan->chan);
598 vap->iv_stats.is_rx_chanmismatch++;
599 scan->status |= IEEE80211_BPARSE_OFFCHAN;
600 }
601 if (!(IEEE80211_BINTVAL_MIN <= scan->bintval &&
602 scan->bintval <= IEEE80211_BINTVAL_MAX)) {
603 IEEE80211_DISCARD(vap,
604 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
605 wh, NULL, "bogus beacon interval", scan->bintval);
606 vap->iv_stats.is_rx_badbintval++;
607 scan->status |= IEEE80211_BPARSE_BINTVAL_INVALID;
608 }
609 if (scan->country != NULL) {
610 /*
611 * Validate we have at least enough data to extract
612 * the country code. Not sure if we should return an
613 * error instead of discarding the IE; consider this
614 * being lenient as we don't depend on the data for
615 * correct operation.
616 */
617 IEEE80211_VERIFY_LENGTH(scan->country[1], 3 * sizeof(uint8_t),
618 scan->country = NULL);
841ab66c 619 }
32176cfd
RP
620 if (scan->csa != NULL) {
621 /*
622 * Validate Channel Switch Announcement; this must
623 * be the correct length or we toss the frame.
624 */
625 IEEE80211_VERIFY_LENGTH(scan->csa[1], 3 * sizeof(uint8_t),
626 scan->status |= IEEE80211_BPARSE_CSA_INVALID);
841ab66c 627 }
841ab66c 628 /*
32176cfd
RP
629 * Process HT ie's. This is complicated by our
630 * accepting both the standard ie's and the pre-draft
631 * vendor OUI ie's that some vendors still use/require.
841ab66c 632 */
32176cfd
RP
633 if (scan->htcap != NULL) {
634 IEEE80211_VERIFY_LENGTH(scan->htcap[1],
635 scan->htcap[0] == IEEE80211_ELEMID_VENDOR ?
636 4 + sizeof(struct ieee80211_ie_htcap)-2 :
637 sizeof(struct ieee80211_ie_htcap)-2,
638 scan->htcap = NULL);
841ab66c 639 }
32176cfd
RP
640 if (scan->htinfo != NULL) {
641 IEEE80211_VERIFY_LENGTH(scan->htinfo[1],
642 scan->htinfo[0] == IEEE80211_ELEMID_VENDOR ?
643 4 + sizeof(struct ieee80211_ie_htinfo)-2 :
644 sizeof(struct ieee80211_ie_htinfo)-2,
645 scan->htinfo = NULL);
841ab66c 646 }
32176cfd 647 return scan->status;
841ab66c
SZ
648}
649
841ab66c 650/*
32176cfd 651 * Parse an Action frame. Return 0 on success, non-zero on failure.
841ab66c 652 */
32176cfd
RP
653int
654ieee80211_parse_action(struct ieee80211_node *ni, struct mbuf *m)
841ab66c 655{
32176cfd
RP
656 struct ieee80211vap *vap = ni->ni_vap;
657 const struct ieee80211_action *ia;
841ab66c
SZ
658 struct ieee80211_frame *wh;
659 uint8_t *frm, *efrm;
841ab66c 660
32176cfd
RP
661 /*
662 * action frame format:
663 * [1] category
664 * [1] action
665 * [tlv] parameters
666 */
667 wh = mtod(m, struct ieee80211_frame *);
668 frm = (u_int8_t *)&wh[1];
669 efrm = mtod(m, u_int8_t *) + m->m_len;
670 IEEE80211_VERIFY_LENGTH(efrm - frm,
671 sizeof(struct ieee80211_action), return EINVAL);
672 ia = (const struct ieee80211_action *) frm;
673
674 vap->iv_stats.is_rx_action++;
675 IEEE80211_NODE_STAT(ni, rx_action);
676
677 /* verify frame payloads but defer processing */
678 /* XXX maybe push this to method */
679 switch (ia->ia_category) {
680 case IEEE80211_ACTION_CAT_BA:
681 switch (ia->ia_action) {
682 case IEEE80211_ACTION_BA_ADDBA_REQUEST:
683 IEEE80211_VERIFY_LENGTH(efrm - frm,
684 sizeof(struct ieee80211_action_ba_addbarequest),
685 return EINVAL);
f186073c 686 break;
32176cfd
RP
687 case IEEE80211_ACTION_BA_ADDBA_RESPONSE:
688 IEEE80211_VERIFY_LENGTH(efrm - frm,
689 sizeof(struct ieee80211_action_ba_addbaresponse),
690 return EINVAL);
f186073c 691 break;
32176cfd
RP
692 case IEEE80211_ACTION_BA_DELBA:
693 IEEE80211_VERIFY_LENGTH(efrm - frm,
694 sizeof(struct ieee80211_action_ba_delba),
695 return EINVAL);
f186073c
JS
696 break;
697 }
698 break;
32176cfd
RP
699 case IEEE80211_ACTION_CAT_HT:
700 switch (ia->ia_action) {
701 case IEEE80211_ACTION_HT_TXCHWIDTH:
702 IEEE80211_VERIFY_LENGTH(efrm - frm,
703 sizeof(struct ieee80211_action_ht_txchwidth),
704 return EINVAL);
f186073c 705 break;
32176cfd
RP
706 case IEEE80211_ACTION_HT_MIMOPWRSAVE:
707 IEEE80211_VERIFY_LENGTH(efrm - frm,
708 sizeof(struct ieee80211_action_ht_mimopowersave),
709 return EINVAL);
f186073c
JS
710 break;
711 }
712 break;
713 }
32176cfd 714 return 0;
841ab66c
SZ
715}
716
717#ifdef IEEE80211_DEBUG
718/*
719 * Debugging support.
720 */
32176cfd
RP
721void
722ieee80211_ssid_mismatch(struct ieee80211vap *vap, const char *tag,
723 uint8_t mac[IEEE80211_ADDR_LEN], uint8_t *ssid)
724{
6168f72e
RP
725 kprintf("[%6D] discard %s frame, ssid mismatch: ",
726 mac, ":", tag);
32176cfd 727 ieee80211_print_essid(ssid + 2, ssid[1]);
6168f72e 728 kprintf("\n");
32176cfd 729}
841ab66c
SZ
730
731/*
732 * Return the bssid of a frame.
733 */
734static const uint8_t *
4028af95 735ieee80211_getbssid(const struct ieee80211vap *vap, const struct ieee80211_frame *wh)
841ab66c 736{
32176cfd 737 if (vap->iv_opmode == IEEE80211_M_STA)
841ab66c
SZ
738 return wh->i_addr2;
739 if ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) != IEEE80211_FC1_DIR_NODS)
740 return wh->i_addr1;
741 if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL)
742 return wh->i_addr1;
743 return wh->i_addr3;
744}
745
32176cfd
RP
746#include <machine/stdarg.h>
747
841ab66c 748void
4028af95 749ieee80211_note(const struct ieee80211vap *vap, const char *fmt, ...)
841ab66c
SZ
750{
751 char buf[128]; /* XXX */
6168f72e 752 __va_list ap;
841ab66c 753
6168f72e 754 __va_start(ap, fmt);
379210cb 755 kvsnprintf(buf, sizeof(buf), fmt, ap);
6168f72e 756 __va_end(ap);
841ab66c 757
32176cfd 758 if_printf(vap->iv_ifp, "%s", buf); /* NB: no \n */
841ab66c
SZ
759}
760
761void
4028af95 762ieee80211_note_frame(const struct ieee80211vap *vap,
841ab66c
SZ
763 const struct ieee80211_frame *wh,
764 const char *fmt, ...)
765{
766 char buf[128]; /* XXX */
6168f72e 767 __va_list ap;
841ab66c 768
6168f72e
RP
769 __va_start(ap, fmt);
770 kvsnprintf(buf, sizeof(buf), fmt, ap);
771 __va_end(ap);
772 if_printf(vap->iv_ifp, "[%6D] %s\n",
773 ieee80211_getbssid(vap, wh), ":", buf);
841ab66c
SZ
774}
775
776void
4028af95 777ieee80211_note_mac(const struct ieee80211vap *vap,
841ab66c
SZ
778 const uint8_t mac[IEEE80211_ADDR_LEN],
779 const char *fmt, ...)
780{
781 char buf[128]; /* XXX */
6168f72e 782 __va_list ap;
841ab66c 783
6168f72e
RP
784 __va_start(ap, fmt);
785 kvsnprintf(buf, sizeof(buf), fmt, ap);
786 __va_end(ap);
787 if_printf(vap->iv_ifp, "[%6D] %s\n", mac, ":", buf);
841ab66c
SZ
788}
789
32176cfd 790void
4028af95 791ieee80211_discard_frame(const struct ieee80211vap *vap,
841ab66c
SZ
792 const struct ieee80211_frame *wh,
793 const char *type, const char *fmt, ...)
794{
6168f72e 795 __va_list ap;
841ab66c 796
6168f72e
RP
797 if_printf(vap->iv_ifp, "[%6D] discard ",
798 ieee80211_getbssid(vap, wh), ":");
32176cfd 799 if (type == NULL) {
6168f72e 800 kprintf("%s frame, ", ieee80211_mgt_subtype_name[
32176cfd
RP
801 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) >>
802 IEEE80211_FC0_SUBTYPE_SHIFT]);
803 } else
6168f72e
RP
804 kprintf("%s frame, ", type);
805 __va_start(ap, fmt);
806 kvprintf(fmt, ap);
807 __va_end(ap);
808 kprintf("\n");
841ab66c
SZ
809}
810
32176cfd 811void
4028af95 812ieee80211_discard_ie(const struct ieee80211vap *vap,
841ab66c
SZ
813 const struct ieee80211_frame *wh,
814 const char *type, const char *fmt, ...)
815{
6168f72e 816 __va_list ap;
841ab66c 817
6168f72e
RP
818 if_printf(vap->iv_ifp, "[%6D] discard ",
819 ieee80211_getbssid(vap, wh), ":");
841ab66c 820 if (type != NULL)
6168f72e 821 kprintf("%s information element, ", type);
841ab66c 822 else
6168f72e
RP
823 kprintf("information element, ");
824 __va_start(ap, fmt);
825 kvprintf(fmt, ap);
826 __va_end(ap);
827 kprintf("\n");
841ab66c
SZ
828}
829
32176cfd 830void
4028af95 831ieee80211_discard_mac(const struct ieee80211vap *vap,
841ab66c
SZ
832 const uint8_t mac[IEEE80211_ADDR_LEN],
833 const char *type, const char *fmt, ...)
834{
6168f72e 835 __va_list ap;
841ab66c 836
6168f72e 837 if_printf(vap->iv_ifp, "[%6D] discard ", mac, ":");
841ab66c 838 if (type != NULL)
6168f72e 839 kprintf("%s frame, ", type);
841ab66c 840 else
6168f72e
RP
841 kprintf("frame, ");
842 __va_start(ap, fmt);
843 kvprintf(fmt, ap);
844 __va_end(ap);
845 kprintf("\n");
841ab66c
SZ
846}
847#endif /* IEEE80211_DEBUG */