1/*-
2 * Copyright (c) 2001 Atsushi Onoe
3 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
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.
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 */
26
27#include <sys/cdefs.h>
| 1/*-
2 * Copyright (c) 2001 Atsushi Onoe
3 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
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.
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 */
26
27#include <sys/cdefs.h>
|
28__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_input.c 296302 2016-03-02 05:01:58Z markj $");
| 28__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_input.c 296823 2016-03-14 04:39:35Z adrian $");
|
29
30#include "opt_wlan.h"
31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/mbuf.h>
35#include <sys/malloc.h>
36#include <sys/endian.h>
37#include <sys/kernel.h>
38
39#include <sys/socket.h>
40
41#include <net/ethernet.h>
42#include <net/if.h>
43#include <net/if_var.h>
44#include <net/if_llc.h>
45#include <net/if_media.h>
46#include <net/if_vlan_var.h>
47
48#include <net80211/ieee80211_var.h>
49#include <net80211/ieee80211_input.h>
50#ifdef IEEE80211_SUPPORT_MESH
51#include <net80211/ieee80211_mesh.h>
52#endif
53
54#include <net/bpf.h>
55
56#ifdef INET
57#include <netinet/in.h>
58#include <net/ethernet.h>
59#endif
60
61static void
62ieee80211_process_mimo(struct ieee80211_node *ni, struct ieee80211_rx_stats *rx)
63{
64 int i;
65
66 /* Verify the required MIMO bits are set */
67 if ((rx->r_flags & (IEEE80211_R_C_CHAIN | IEEE80211_R_C_NF | IEEE80211_R_C_RSSI)) !=
68 (IEEE80211_R_C_CHAIN | IEEE80211_R_C_NF | IEEE80211_R_C_RSSI))
69 return;
70
71 /* XXX This assumes the MIMO radios have both ctl and ext chains */
72 for (i = 0; i < MIN(rx->c_chain, IEEE80211_MAX_CHAINS); i++) {
73 IEEE80211_RSSI_LPF(ni->ni_mimo_rssi_ctl[i], rx->c_rssi_ctl[i]);
74 IEEE80211_RSSI_LPF(ni->ni_mimo_rssi_ext[i], rx->c_rssi_ext[i]);
75 }
76
77 /* XXX This also assumes the MIMO radios have both ctl and ext chains */
78 for(i = 0; i < MIN(rx->c_chain, IEEE80211_MAX_CHAINS); i++) {
79 ni->ni_mimo_noise_ctl[i] = rx->c_nf_ctl[i];
80 ni->ni_mimo_noise_ext[i] = rx->c_nf_ext[i];
81 }
82 ni->ni_mimo_chains = rx->c_chain;
83}
84
85int
86ieee80211_input_mimo(struct ieee80211_node *ni, struct mbuf *m,
87 struct ieee80211_rx_stats *rx)
88{
89 struct ieee80211_rx_stats rxs;
90
91 if (rx) {
92 memcpy(&rxs, rx, sizeof(*rx));
93 } else {
94 /* try to read from mbuf */
95 bzero(&rxs, sizeof(rxs));
96 ieee80211_get_rx_params(m, &rxs);
97 }
98
99 /* XXX should assert IEEE80211_R_NF and IEEE80211_R_RSSI are set */
100 ieee80211_process_mimo(ni, &rxs);
101
102 //return ieee80211_input(ni, m, rx->rssi, rx->nf);
103 return ni->ni_vap->iv_input(ni, m, &rxs, rxs.rssi, rxs.nf);
104}
105
106int
107ieee80211_input_all(struct ieee80211com *ic, struct mbuf *m, int rssi, int nf)
108{
109 struct ieee80211_rx_stats rx;
110
111 rx.r_flags = IEEE80211_R_NF | IEEE80211_R_RSSI;
112 rx.nf = nf;
113 rx.rssi = rssi;
114 return ieee80211_input_mimo_all(ic, m, &rx);
115}
116
117int
118ieee80211_input_mimo_all(struct ieee80211com *ic, struct mbuf *m,
119 struct ieee80211_rx_stats *rx)
120{
121 struct ieee80211_rx_stats rxs;
122 struct ieee80211vap *vap;
123 int type = -1;
124
125 m->m_flags |= M_BCAST; /* NB: mark for bpf tap'ing */
126
127 if (rx) {
128 memcpy(&rxs, rx, sizeof(*rx));
129 } else {
130 /* try to read from mbuf */
131 bzero(&rxs, sizeof(rxs));
132 ieee80211_get_rx_params(m, &rxs);
133 }
134
135 /* XXX locking */
136 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
137 struct ieee80211_node *ni;
138 struct mbuf *mcopy;
139
140 /* NB: could check for IFF_UP but this is cheaper */
141 if (vap->iv_state == IEEE80211_S_INIT)
142 continue;
143 /*
144 * WDS vap's only receive directed traffic from the
145 * station at the ``far end''. That traffic should
146 * be passed through the AP vap the station is associated
147 * to--so don't spam them with mcast frames.
148 */
149 if (vap->iv_opmode == IEEE80211_M_WDS)
150 continue;
151 if (TAILQ_NEXT(vap, iv_next) != NULL) {
152 /*
153 * Packet contents are changed by ieee80211_decap
154 * so do a deep copy of the packet.
155 */
156 mcopy = m_dup(m, M_NOWAIT);
157 if (mcopy == NULL) {
158 /* XXX stat+msg */
159 continue;
160 }
161 } else {
162 mcopy = m;
163 m = NULL;
164 }
165 ni = ieee80211_ref_node(vap->iv_bss);
166 type = ieee80211_input_mimo(ni, mcopy, &rxs);
167 ieee80211_free_node(ni);
168 }
169 if (m != NULL) /* no vaps, reclaim mbuf */
170 m_freem(m);
171 return type;
172}
173
174/*
175 * This function reassembles fragments.
176 *
177 * XXX should handle 3 concurrent reassemblies per-spec.
178 */
179struct mbuf *
180ieee80211_defrag(struct ieee80211_node *ni, struct mbuf *m, int hdrspace)
181{
182 struct ieee80211vap *vap = ni->ni_vap;
183 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
184 struct ieee80211_frame *lwh;
185 uint16_t rxseq;
186 uint8_t fragno;
187 uint8_t more_frag = wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG;
188 struct mbuf *mfrag;
189
190 KASSERT(!IEEE80211_IS_MULTICAST(wh->i_addr1), ("multicast fragm?"));
191
192 rxseq = le16toh(*(uint16_t *)wh->i_seq);
193 fragno = rxseq & IEEE80211_SEQ_FRAG_MASK;
194
195 /* Quick way out, if there's nothing to defragment */
196 if (!more_frag && fragno == 0 && ni->ni_rxfrag[0] == NULL)
197 return m;
198
199 /*
200 * Remove frag to insure it doesn't get reaped by timer.
201 */
202 if (ni->ni_table == NULL) {
203 /*
204 * Should never happen. If the node is orphaned (not in
205 * the table) then input packets should not reach here.
206 * Otherwise, a concurrent request that yanks the table
207 * should be blocked by other interlocking and/or by first
208 * shutting the driver down. Regardless, be defensive
209 * here and just bail
210 */
211 /* XXX need msg+stat */
212 m_freem(m);
213 return NULL;
214 }
215 IEEE80211_NODE_LOCK(ni->ni_table);
216 mfrag = ni->ni_rxfrag[0];
217 ni->ni_rxfrag[0] = NULL;
218 IEEE80211_NODE_UNLOCK(ni->ni_table);
219
220 /*
221 * Validate new fragment is in order and
222 * related to the previous ones.
223 */
224 if (mfrag != NULL) {
225 uint16_t last_rxseq;
226
227 lwh = mtod(mfrag, struct ieee80211_frame *);
228 last_rxseq = le16toh(*(uint16_t *)lwh->i_seq);
229 /* NB: check seq # and frag together */
230 if (rxseq != last_rxseq+1 ||
231 !IEEE80211_ADDR_EQ(wh->i_addr1, lwh->i_addr1) ||
232 !IEEE80211_ADDR_EQ(wh->i_addr2, lwh->i_addr2)) {
233 /*
234 * Unrelated fragment or no space for it,
235 * clear current fragments.
236 */
237 m_freem(mfrag);
238 mfrag = NULL;
239 }
240 }
241
242 if (mfrag == NULL) {
243 if (fragno != 0) { /* !first fragment, discard */
244 vap->iv_stats.is_rx_defrag++;
245 IEEE80211_NODE_STAT(ni, rx_defrag);
246 m_freem(m);
247 return NULL;
248 }
249 mfrag = m;
250 } else { /* concatenate */
251 m_adj(m, hdrspace); /* strip header */
252 m_catpkt(mfrag, m);
253 /* track last seqnum and fragno */
254 lwh = mtod(mfrag, struct ieee80211_frame *);
255 *(uint16_t *) lwh->i_seq = *(uint16_t *) wh->i_seq;
256 }
257 if (more_frag) { /* more to come, save */
258 ni->ni_rxfragstamp = ticks;
259 ni->ni_rxfrag[0] = mfrag;
260 mfrag = NULL;
261 }
262 return mfrag;
263}
264
265void
266ieee80211_deliver_data(struct ieee80211vap *vap,
267 struct ieee80211_node *ni, struct mbuf *m)
268{
269 struct ether_header *eh = mtod(m, struct ether_header *);
270 struct ifnet *ifp = vap->iv_ifp;
271
272 /* clear driver/net80211 flags before passing up */
273 m->m_flags &= ~(M_MCAST | M_BCAST);
274 m_clrprotoflags(m);
275
276 /* NB: see hostap_deliver_data, this path doesn't handle hostap */
277 KASSERT(vap->iv_opmode != IEEE80211_M_HOSTAP, ("gack, hostap"));
278 /*
279 * Do accounting.
280 */
281 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
282 IEEE80211_NODE_STAT(ni, rx_data);
283 IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len);
284 if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
285 m->m_flags |= M_MCAST; /* XXX M_BCAST? */
286 IEEE80211_NODE_STAT(ni, rx_mcast);
287 } else
288 IEEE80211_NODE_STAT(ni, rx_ucast);
289 m->m_pkthdr.rcvif = ifp;
290
291 if (ni->ni_vlan != 0) {
292 /* attach vlan tag */
293 m->m_pkthdr.ether_vtag = ni->ni_vlan;
294 m->m_flags |= M_VLANTAG;
295 }
296 ifp->if_input(ifp, m);
297}
298
299struct mbuf *
300ieee80211_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen)
301{
302 struct ieee80211_qosframe_addr4 wh;
303 struct ether_header *eh;
304 struct llc *llc;
305
306 KASSERT(hdrlen <= sizeof(wh),
307 ("hdrlen %d > max %zd", hdrlen, sizeof(wh)));
308
309 if (m->m_len < hdrlen + sizeof(*llc) &&
310 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
311 vap->iv_stats.is_rx_tooshort++;
312 /* XXX msg */
313 return NULL;
314 }
315 memcpy(&wh, mtod(m, caddr_t), hdrlen);
316 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
317 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
318 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
319 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
320 /* NB: preserve AppleTalk frames that have a native SNAP hdr */
321 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
322 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
323 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
324 llc = NULL;
325 } else {
326 m_adj(m, hdrlen - sizeof(*eh));
327 }
328 eh = mtod(m, struct ether_header *);
329 switch (wh.i_fc[1] & IEEE80211_FC1_DIR_MASK) {
330 case IEEE80211_FC1_DIR_NODS:
331 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr1);
332 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr2);
333 break;
334 case IEEE80211_FC1_DIR_TODS:
335 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr3);
336 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr2);
337 break;
338 case IEEE80211_FC1_DIR_FROMDS:
339 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr1);
340 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr3);
341 break;
342 case IEEE80211_FC1_DIR_DSTODS:
343 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr3);
344 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr4);
345 break;
346 }
347#ifndef __NO_STRICT_ALIGNMENT
348 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
349 m = ieee80211_realign(vap, m, sizeof(*eh));
350 if (m == NULL)
351 return NULL;
352 }
353#endif /* !__NO_STRICT_ALIGNMENT */
354 if (llc != NULL) {
355 eh = mtod(m, struct ether_header *);
356 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
357 }
358 return m;
359}
360
361/*
362 * Decap a frame encapsulated in a fast-frame/A-MSDU.
363 */
364struct mbuf *
365ieee80211_decap1(struct mbuf *m, int *framelen)
366{
367#define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc))
368 struct ether_header *eh;
369 struct llc *llc;
370
371 /*
372 * The frame has an 802.3 header followed by an 802.2
373 * LLC header. The encapsulated frame length is in the
374 * first header type field; save that and overwrite it
375 * with the true type field found in the second. Then
376 * copy the 802.3 header up to where it belongs and
377 * adjust the mbuf contents to remove the void.
378 */
379 if (m->m_len < FF_LLC_SIZE && (m = m_pullup(m, FF_LLC_SIZE)) == NULL)
380 return NULL;
381 eh = mtod(m, struct ether_header *); /* 802.3 header is first */
382 llc = (struct llc *)&eh[1]; /* 802.2 header follows */
383 *framelen = ntohs(eh->ether_type) /* encap'd frame size */
384 + sizeof(struct ether_header) - sizeof(struct llc);
385 eh->ether_type = llc->llc_un.type_snap.ether_type;
386 ovbcopy(eh, mtod(m, uint8_t *) + sizeof(struct llc),
387 sizeof(struct ether_header));
388 m_adj(m, sizeof(struct llc));
389 return m;
390#undef FF_LLC_SIZE
391}
392
393/*
394 * Install received rate set information in the node's state block.
395 */
396int
397ieee80211_setup_rates(struct ieee80211_node *ni,
398 const uint8_t *rates, const uint8_t *xrates, int flags)
399{
400 struct ieee80211vap *vap = ni->ni_vap;
401 struct ieee80211_rateset *rs = &ni->ni_rates;
402
403 memset(rs, 0, sizeof(*rs));
404 rs->rs_nrates = rates[1];
405 memcpy(rs->rs_rates, rates + 2, rs->rs_nrates);
406 if (xrates != NULL) {
407 uint8_t nxrates;
408 /*
409 * Tack on 11g extended supported rate element.
410 */
411 nxrates = xrates[1];
412 if (rs->rs_nrates + nxrates > IEEE80211_RATE_MAXSIZE) {
413 nxrates = IEEE80211_RATE_MAXSIZE - rs->rs_nrates;
414 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE, ni,
415 "extended rate set too large; only using "
416 "%u of %u rates", nxrates, xrates[1]);
417 vap->iv_stats.is_rx_rstoobig++;
418 }
419 memcpy(rs->rs_rates + rs->rs_nrates, xrates+2, nxrates);
420 rs->rs_nrates += nxrates;
421 }
422 return ieee80211_fix_rate(ni, rs, flags);
423}
424
425/*
426 * Send a management frame error response to the specified
427 * station. If ni is associated with the station then use
428 * it; otherwise allocate a temporary node suitable for
429 * transmitting the frame and then free the reference so
430 * it will go away as soon as the frame has been transmitted.
431 */
432void
433ieee80211_send_error(struct ieee80211_node *ni,
434 const uint8_t mac[IEEE80211_ADDR_LEN], int subtype, int arg)
435{
436 struct ieee80211vap *vap = ni->ni_vap;
437 int istmp;
438
439 if (ni == vap->iv_bss) {
440 if (vap->iv_state != IEEE80211_S_RUN) {
441 /*
442 * XXX hack until we get rid of this routine.
443 * We can be called prior to the vap reaching
444 * run state under certain conditions in which
445 * case iv_bss->ni_chan will not be setup.
446 * Check for this explicitly and and just ignore
447 * the request.
448 */
449 return;
450 }
451 ni = ieee80211_tmp_node(vap, mac);
452 if (ni == NULL) {
453 /* XXX msg */
454 return;
455 }
456 istmp = 1;
457 } else
458 istmp = 0;
459 IEEE80211_SEND_MGMT(ni, subtype, arg);
460 if (istmp)
461 ieee80211_free_node(ni);
462}
463
464int
465ieee80211_alloc_challenge(struct ieee80211_node *ni)
466{
467 if (ni->ni_challenge == NULL)
468 ni->ni_challenge = (uint32_t *)
469 IEEE80211_MALLOC(IEEE80211_CHALLENGE_LEN,
470 M_80211_NODE, IEEE80211_M_NOWAIT);
471 if (ni->ni_challenge == NULL) {
472 IEEE80211_NOTE(ni->ni_vap,
473 IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni,
474 "%s", "shared key challenge alloc failed");
475 /* XXX statistic */
476 }
477 return (ni->ni_challenge != NULL);
478}
479
480/*
481 * Parse a Beacon or ProbeResponse frame and return the
482 * useful information in an ieee80211_scanparams structure.
483 * Status is set to 0 if no problems were found; otherwise
484 * a bitmask of IEEE80211_BPARSE_* items is returned that
485 * describes the problems detected.
486 */
487int
488ieee80211_parse_beacon(struct ieee80211_node *ni, struct mbuf *m,
489 struct ieee80211_channel *rxchan, struct ieee80211_scanparams *scan)
490{
491 struct ieee80211vap *vap = ni->ni_vap;
492 struct ieee80211com *ic = ni->ni_ic;
493 struct ieee80211_frame *wh;
494 uint8_t *frm, *efrm;
495
496 wh = mtod(m, struct ieee80211_frame *);
497 frm = (uint8_t *)&wh[1];
498 efrm = mtod(m, uint8_t *) + m->m_len;
499 scan->status = 0;
500 /*
501 * beacon/probe response frame format
502 * [8] time stamp
503 * [2] beacon interval
504 * [2] capability information
505 * [tlv] ssid
506 * [tlv] supported rates
507 * [tlv] country information
508 * [tlv] channel switch announcement (CSA)
509 * [tlv] parameter set (FH/DS)
510 * [tlv] erp information
511 * [tlv] extended supported rates
512 * [tlv] WME
513 * [tlv] WPA or RSN
514 * [tlv] HT capabilities
515 * [tlv] HT information
516 * [tlv] Atheros capabilities
517 * [tlv] Mesh ID
518 * [tlv] Mesh Configuration
519 */
520 IEEE80211_VERIFY_LENGTH(efrm - frm, 12,
521 return (scan->status = IEEE80211_BPARSE_BADIELEN));
522 memset(scan, 0, sizeof(*scan));
523 scan->tstamp = frm; frm += 8;
524 scan->bintval = le16toh(*(uint16_t *)frm); frm += 2;
525 scan->capinfo = le16toh(*(uint16_t *)frm); frm += 2;
526 scan->bchan = ieee80211_chan2ieee(ic, rxchan);
527 scan->chan = scan->bchan;
528 scan->ies = frm;
529 scan->ies_len = efrm - frm;
530
531 while (efrm - frm > 1) {
532 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2,
533 return (scan->status = IEEE80211_BPARSE_BADIELEN));
534 switch (*frm) {
535 case IEEE80211_ELEMID_SSID:
536 scan->ssid = frm;
537 break;
538 case IEEE80211_ELEMID_RATES:
539 scan->rates = frm;
540 break;
541 case IEEE80211_ELEMID_COUNTRY:
542 scan->country = frm;
543 break;
544 case IEEE80211_ELEMID_CSA:
545 scan->csa = frm;
546 break;
547 case IEEE80211_ELEMID_QUIET:
548 scan->quiet = frm;
549 break;
550 case IEEE80211_ELEMID_FHPARMS:
551 if (ic->ic_phytype == IEEE80211_T_FH) {
552 scan->fhdwell = LE_READ_2(&frm[2]);
553 scan->chan = IEEE80211_FH_CHAN(frm[4], frm[5]);
554 scan->fhindex = frm[6];
555 }
556 break;
557 case IEEE80211_ELEMID_DSPARMS:
558 /*
559 * XXX hack this since depending on phytype
560 * is problematic for multi-mode devices.
561 */
562 if (ic->ic_phytype != IEEE80211_T_FH)
563 scan->chan = frm[2];
564 break;
565 case IEEE80211_ELEMID_TIM:
566 /* XXX ATIM? */
567 scan->tim = frm;
568 scan->timoff = frm - mtod(m, uint8_t *);
569 break;
570 case IEEE80211_ELEMID_IBSSPARMS:
571 case IEEE80211_ELEMID_CFPARMS:
572 case IEEE80211_ELEMID_PWRCNSTR:
| 29
30#include "opt_wlan.h"
31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/mbuf.h>
35#include <sys/malloc.h>
36#include <sys/endian.h>
37#include <sys/kernel.h>
38
39#include <sys/socket.h>
40
41#include <net/ethernet.h>
42#include <net/if.h>
43#include <net/if_var.h>
44#include <net/if_llc.h>
45#include <net/if_media.h>
46#include <net/if_vlan_var.h>
47
48#include <net80211/ieee80211_var.h>
49#include <net80211/ieee80211_input.h>
50#ifdef IEEE80211_SUPPORT_MESH
51#include <net80211/ieee80211_mesh.h>
52#endif
53
54#include <net/bpf.h>
55
56#ifdef INET
57#include <netinet/in.h>
58#include <net/ethernet.h>
59#endif
60
61static void
62ieee80211_process_mimo(struct ieee80211_node *ni, struct ieee80211_rx_stats *rx)
63{
64 int i;
65
66 /* Verify the required MIMO bits are set */
67 if ((rx->r_flags & (IEEE80211_R_C_CHAIN | IEEE80211_R_C_NF | IEEE80211_R_C_RSSI)) !=
68 (IEEE80211_R_C_CHAIN | IEEE80211_R_C_NF | IEEE80211_R_C_RSSI))
69 return;
70
71 /* XXX This assumes the MIMO radios have both ctl and ext chains */
72 for (i = 0; i < MIN(rx->c_chain, IEEE80211_MAX_CHAINS); i++) {
73 IEEE80211_RSSI_LPF(ni->ni_mimo_rssi_ctl[i], rx->c_rssi_ctl[i]);
74 IEEE80211_RSSI_LPF(ni->ni_mimo_rssi_ext[i], rx->c_rssi_ext[i]);
75 }
76
77 /* XXX This also assumes the MIMO radios have both ctl and ext chains */
78 for(i = 0; i < MIN(rx->c_chain, IEEE80211_MAX_CHAINS); i++) {
79 ni->ni_mimo_noise_ctl[i] = rx->c_nf_ctl[i];
80 ni->ni_mimo_noise_ext[i] = rx->c_nf_ext[i];
81 }
82 ni->ni_mimo_chains = rx->c_chain;
83}
84
85int
86ieee80211_input_mimo(struct ieee80211_node *ni, struct mbuf *m,
87 struct ieee80211_rx_stats *rx)
88{
89 struct ieee80211_rx_stats rxs;
90
91 if (rx) {
92 memcpy(&rxs, rx, sizeof(*rx));
93 } else {
94 /* try to read from mbuf */
95 bzero(&rxs, sizeof(rxs));
96 ieee80211_get_rx_params(m, &rxs);
97 }
98
99 /* XXX should assert IEEE80211_R_NF and IEEE80211_R_RSSI are set */
100 ieee80211_process_mimo(ni, &rxs);
101
102 //return ieee80211_input(ni, m, rx->rssi, rx->nf);
103 return ni->ni_vap->iv_input(ni, m, &rxs, rxs.rssi, rxs.nf);
104}
105
106int
107ieee80211_input_all(struct ieee80211com *ic, struct mbuf *m, int rssi, int nf)
108{
109 struct ieee80211_rx_stats rx;
110
111 rx.r_flags = IEEE80211_R_NF | IEEE80211_R_RSSI;
112 rx.nf = nf;
113 rx.rssi = rssi;
114 return ieee80211_input_mimo_all(ic, m, &rx);
115}
116
117int
118ieee80211_input_mimo_all(struct ieee80211com *ic, struct mbuf *m,
119 struct ieee80211_rx_stats *rx)
120{
121 struct ieee80211_rx_stats rxs;
122 struct ieee80211vap *vap;
123 int type = -1;
124
125 m->m_flags |= M_BCAST; /* NB: mark for bpf tap'ing */
126
127 if (rx) {
128 memcpy(&rxs, rx, sizeof(*rx));
129 } else {
130 /* try to read from mbuf */
131 bzero(&rxs, sizeof(rxs));
132 ieee80211_get_rx_params(m, &rxs);
133 }
134
135 /* XXX locking */
136 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
137 struct ieee80211_node *ni;
138 struct mbuf *mcopy;
139
140 /* NB: could check for IFF_UP but this is cheaper */
141 if (vap->iv_state == IEEE80211_S_INIT)
142 continue;
143 /*
144 * WDS vap's only receive directed traffic from the
145 * station at the ``far end''. That traffic should
146 * be passed through the AP vap the station is associated
147 * to--so don't spam them with mcast frames.
148 */
149 if (vap->iv_opmode == IEEE80211_M_WDS)
150 continue;
151 if (TAILQ_NEXT(vap, iv_next) != NULL) {
152 /*
153 * Packet contents are changed by ieee80211_decap
154 * so do a deep copy of the packet.
155 */
156 mcopy = m_dup(m, M_NOWAIT);
157 if (mcopy == NULL) {
158 /* XXX stat+msg */
159 continue;
160 }
161 } else {
162 mcopy = m;
163 m = NULL;
164 }
165 ni = ieee80211_ref_node(vap->iv_bss);
166 type = ieee80211_input_mimo(ni, mcopy, &rxs);
167 ieee80211_free_node(ni);
168 }
169 if (m != NULL) /* no vaps, reclaim mbuf */
170 m_freem(m);
171 return type;
172}
173
174/*
175 * This function reassembles fragments.
176 *
177 * XXX should handle 3 concurrent reassemblies per-spec.
178 */
179struct mbuf *
180ieee80211_defrag(struct ieee80211_node *ni, struct mbuf *m, int hdrspace)
181{
182 struct ieee80211vap *vap = ni->ni_vap;
183 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
184 struct ieee80211_frame *lwh;
185 uint16_t rxseq;
186 uint8_t fragno;
187 uint8_t more_frag = wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG;
188 struct mbuf *mfrag;
189
190 KASSERT(!IEEE80211_IS_MULTICAST(wh->i_addr1), ("multicast fragm?"));
191
192 rxseq = le16toh(*(uint16_t *)wh->i_seq);
193 fragno = rxseq & IEEE80211_SEQ_FRAG_MASK;
194
195 /* Quick way out, if there's nothing to defragment */
196 if (!more_frag && fragno == 0 && ni->ni_rxfrag[0] == NULL)
197 return m;
198
199 /*
200 * Remove frag to insure it doesn't get reaped by timer.
201 */
202 if (ni->ni_table == NULL) {
203 /*
204 * Should never happen. If the node is orphaned (not in
205 * the table) then input packets should not reach here.
206 * Otherwise, a concurrent request that yanks the table
207 * should be blocked by other interlocking and/or by first
208 * shutting the driver down. Regardless, be defensive
209 * here and just bail
210 */
211 /* XXX need msg+stat */
212 m_freem(m);
213 return NULL;
214 }
215 IEEE80211_NODE_LOCK(ni->ni_table);
216 mfrag = ni->ni_rxfrag[0];
217 ni->ni_rxfrag[0] = NULL;
218 IEEE80211_NODE_UNLOCK(ni->ni_table);
219
220 /*
221 * Validate new fragment is in order and
222 * related to the previous ones.
223 */
224 if (mfrag != NULL) {
225 uint16_t last_rxseq;
226
227 lwh = mtod(mfrag, struct ieee80211_frame *);
228 last_rxseq = le16toh(*(uint16_t *)lwh->i_seq);
229 /* NB: check seq # and frag together */
230 if (rxseq != last_rxseq+1 ||
231 !IEEE80211_ADDR_EQ(wh->i_addr1, lwh->i_addr1) ||
232 !IEEE80211_ADDR_EQ(wh->i_addr2, lwh->i_addr2)) {
233 /*
234 * Unrelated fragment or no space for it,
235 * clear current fragments.
236 */
237 m_freem(mfrag);
238 mfrag = NULL;
239 }
240 }
241
242 if (mfrag == NULL) {
243 if (fragno != 0) { /* !first fragment, discard */
244 vap->iv_stats.is_rx_defrag++;
245 IEEE80211_NODE_STAT(ni, rx_defrag);
246 m_freem(m);
247 return NULL;
248 }
249 mfrag = m;
250 } else { /* concatenate */
251 m_adj(m, hdrspace); /* strip header */
252 m_catpkt(mfrag, m);
253 /* track last seqnum and fragno */
254 lwh = mtod(mfrag, struct ieee80211_frame *);
255 *(uint16_t *) lwh->i_seq = *(uint16_t *) wh->i_seq;
256 }
257 if (more_frag) { /* more to come, save */
258 ni->ni_rxfragstamp = ticks;
259 ni->ni_rxfrag[0] = mfrag;
260 mfrag = NULL;
261 }
262 return mfrag;
263}
264
265void
266ieee80211_deliver_data(struct ieee80211vap *vap,
267 struct ieee80211_node *ni, struct mbuf *m)
268{
269 struct ether_header *eh = mtod(m, struct ether_header *);
270 struct ifnet *ifp = vap->iv_ifp;
271
272 /* clear driver/net80211 flags before passing up */
273 m->m_flags &= ~(M_MCAST | M_BCAST);
274 m_clrprotoflags(m);
275
276 /* NB: see hostap_deliver_data, this path doesn't handle hostap */
277 KASSERT(vap->iv_opmode != IEEE80211_M_HOSTAP, ("gack, hostap"));
278 /*
279 * Do accounting.
280 */
281 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
282 IEEE80211_NODE_STAT(ni, rx_data);
283 IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len);
284 if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
285 m->m_flags |= M_MCAST; /* XXX M_BCAST? */
286 IEEE80211_NODE_STAT(ni, rx_mcast);
287 } else
288 IEEE80211_NODE_STAT(ni, rx_ucast);
289 m->m_pkthdr.rcvif = ifp;
290
291 if (ni->ni_vlan != 0) {
292 /* attach vlan tag */
293 m->m_pkthdr.ether_vtag = ni->ni_vlan;
294 m->m_flags |= M_VLANTAG;
295 }
296 ifp->if_input(ifp, m);
297}
298
299struct mbuf *
300ieee80211_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen)
301{
302 struct ieee80211_qosframe_addr4 wh;
303 struct ether_header *eh;
304 struct llc *llc;
305
306 KASSERT(hdrlen <= sizeof(wh),
307 ("hdrlen %d > max %zd", hdrlen, sizeof(wh)));
308
309 if (m->m_len < hdrlen + sizeof(*llc) &&
310 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
311 vap->iv_stats.is_rx_tooshort++;
312 /* XXX msg */
313 return NULL;
314 }
315 memcpy(&wh, mtod(m, caddr_t), hdrlen);
316 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
317 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
318 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
319 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
320 /* NB: preserve AppleTalk frames that have a native SNAP hdr */
321 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
322 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
323 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
324 llc = NULL;
325 } else {
326 m_adj(m, hdrlen - sizeof(*eh));
327 }
328 eh = mtod(m, struct ether_header *);
329 switch (wh.i_fc[1] & IEEE80211_FC1_DIR_MASK) {
330 case IEEE80211_FC1_DIR_NODS:
331 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr1);
332 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr2);
333 break;
334 case IEEE80211_FC1_DIR_TODS:
335 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr3);
336 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr2);
337 break;
338 case IEEE80211_FC1_DIR_FROMDS:
339 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr1);
340 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr3);
341 break;
342 case IEEE80211_FC1_DIR_DSTODS:
343 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr3);
344 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr4);
345 break;
346 }
347#ifndef __NO_STRICT_ALIGNMENT
348 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
349 m = ieee80211_realign(vap, m, sizeof(*eh));
350 if (m == NULL)
351 return NULL;
352 }
353#endif /* !__NO_STRICT_ALIGNMENT */
354 if (llc != NULL) {
355 eh = mtod(m, struct ether_header *);
356 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
357 }
358 return m;
359}
360
361/*
362 * Decap a frame encapsulated in a fast-frame/A-MSDU.
363 */
364struct mbuf *
365ieee80211_decap1(struct mbuf *m, int *framelen)
366{
367#define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc))
368 struct ether_header *eh;
369 struct llc *llc;
370
371 /*
372 * The frame has an 802.3 header followed by an 802.2
373 * LLC header. The encapsulated frame length is in the
374 * first header type field; save that and overwrite it
375 * with the true type field found in the second. Then
376 * copy the 802.3 header up to where it belongs and
377 * adjust the mbuf contents to remove the void.
378 */
379 if (m->m_len < FF_LLC_SIZE && (m = m_pullup(m, FF_LLC_SIZE)) == NULL)
380 return NULL;
381 eh = mtod(m, struct ether_header *); /* 802.3 header is first */
382 llc = (struct llc *)&eh[1]; /* 802.2 header follows */
383 *framelen = ntohs(eh->ether_type) /* encap'd frame size */
384 + sizeof(struct ether_header) - sizeof(struct llc);
385 eh->ether_type = llc->llc_un.type_snap.ether_type;
386 ovbcopy(eh, mtod(m, uint8_t *) + sizeof(struct llc),
387 sizeof(struct ether_header));
388 m_adj(m, sizeof(struct llc));
389 return m;
390#undef FF_LLC_SIZE
391}
392
393/*
394 * Install received rate set information in the node's state block.
395 */
396int
397ieee80211_setup_rates(struct ieee80211_node *ni,
398 const uint8_t *rates, const uint8_t *xrates, int flags)
399{
400 struct ieee80211vap *vap = ni->ni_vap;
401 struct ieee80211_rateset *rs = &ni->ni_rates;
402
403 memset(rs, 0, sizeof(*rs));
404 rs->rs_nrates = rates[1];
405 memcpy(rs->rs_rates, rates + 2, rs->rs_nrates);
406 if (xrates != NULL) {
407 uint8_t nxrates;
408 /*
409 * Tack on 11g extended supported rate element.
410 */
411 nxrates = xrates[1];
412 if (rs->rs_nrates + nxrates > IEEE80211_RATE_MAXSIZE) {
413 nxrates = IEEE80211_RATE_MAXSIZE - rs->rs_nrates;
414 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE, ni,
415 "extended rate set too large; only using "
416 "%u of %u rates", nxrates, xrates[1]);
417 vap->iv_stats.is_rx_rstoobig++;
418 }
419 memcpy(rs->rs_rates + rs->rs_nrates, xrates+2, nxrates);
420 rs->rs_nrates += nxrates;
421 }
422 return ieee80211_fix_rate(ni, rs, flags);
423}
424
425/*
426 * Send a management frame error response to the specified
427 * station. If ni is associated with the station then use
428 * it; otherwise allocate a temporary node suitable for
429 * transmitting the frame and then free the reference so
430 * it will go away as soon as the frame has been transmitted.
431 */
432void
433ieee80211_send_error(struct ieee80211_node *ni,
434 const uint8_t mac[IEEE80211_ADDR_LEN], int subtype, int arg)
435{
436 struct ieee80211vap *vap = ni->ni_vap;
437 int istmp;
438
439 if (ni == vap->iv_bss) {
440 if (vap->iv_state != IEEE80211_S_RUN) {
441 /*
442 * XXX hack until we get rid of this routine.
443 * We can be called prior to the vap reaching
444 * run state under certain conditions in which
445 * case iv_bss->ni_chan will not be setup.
446 * Check for this explicitly and and just ignore
447 * the request.
448 */
449 return;
450 }
451 ni = ieee80211_tmp_node(vap, mac);
452 if (ni == NULL) {
453 /* XXX msg */
454 return;
455 }
456 istmp = 1;
457 } else
458 istmp = 0;
459 IEEE80211_SEND_MGMT(ni, subtype, arg);
460 if (istmp)
461 ieee80211_free_node(ni);
462}
463
464int
465ieee80211_alloc_challenge(struct ieee80211_node *ni)
466{
467 if (ni->ni_challenge == NULL)
468 ni->ni_challenge = (uint32_t *)
469 IEEE80211_MALLOC(IEEE80211_CHALLENGE_LEN,
470 M_80211_NODE, IEEE80211_M_NOWAIT);
471 if (ni->ni_challenge == NULL) {
472 IEEE80211_NOTE(ni->ni_vap,
473 IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni,
474 "%s", "shared key challenge alloc failed");
475 /* XXX statistic */
476 }
477 return (ni->ni_challenge != NULL);
478}
479
480/*
481 * Parse a Beacon or ProbeResponse frame and return the
482 * useful information in an ieee80211_scanparams structure.
483 * Status is set to 0 if no problems were found; otherwise
484 * a bitmask of IEEE80211_BPARSE_* items is returned that
485 * describes the problems detected.
486 */
487int
488ieee80211_parse_beacon(struct ieee80211_node *ni, struct mbuf *m,
489 struct ieee80211_channel *rxchan, struct ieee80211_scanparams *scan)
490{
491 struct ieee80211vap *vap = ni->ni_vap;
492 struct ieee80211com *ic = ni->ni_ic;
493 struct ieee80211_frame *wh;
494 uint8_t *frm, *efrm;
495
496 wh = mtod(m, struct ieee80211_frame *);
497 frm = (uint8_t *)&wh[1];
498 efrm = mtod(m, uint8_t *) + m->m_len;
499 scan->status = 0;
500 /*
501 * beacon/probe response frame format
502 * [8] time stamp
503 * [2] beacon interval
504 * [2] capability information
505 * [tlv] ssid
506 * [tlv] supported rates
507 * [tlv] country information
508 * [tlv] channel switch announcement (CSA)
509 * [tlv] parameter set (FH/DS)
510 * [tlv] erp information
511 * [tlv] extended supported rates
512 * [tlv] WME
513 * [tlv] WPA or RSN
514 * [tlv] HT capabilities
515 * [tlv] HT information
516 * [tlv] Atheros capabilities
517 * [tlv] Mesh ID
518 * [tlv] Mesh Configuration
519 */
520 IEEE80211_VERIFY_LENGTH(efrm - frm, 12,
521 return (scan->status = IEEE80211_BPARSE_BADIELEN));
522 memset(scan, 0, sizeof(*scan));
523 scan->tstamp = frm; frm += 8;
524 scan->bintval = le16toh(*(uint16_t *)frm); frm += 2;
525 scan->capinfo = le16toh(*(uint16_t *)frm); frm += 2;
526 scan->bchan = ieee80211_chan2ieee(ic, rxchan);
527 scan->chan = scan->bchan;
528 scan->ies = frm;
529 scan->ies_len = efrm - frm;
530
531 while (efrm - frm > 1) {
532 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2,
533 return (scan->status = IEEE80211_BPARSE_BADIELEN));
534 switch (*frm) {
535 case IEEE80211_ELEMID_SSID:
536 scan->ssid = frm;
537 break;
538 case IEEE80211_ELEMID_RATES:
539 scan->rates = frm;
540 break;
541 case IEEE80211_ELEMID_COUNTRY:
542 scan->country = frm;
543 break;
544 case IEEE80211_ELEMID_CSA:
545 scan->csa = frm;
546 break;
547 case IEEE80211_ELEMID_QUIET:
548 scan->quiet = frm;
549 break;
550 case IEEE80211_ELEMID_FHPARMS:
551 if (ic->ic_phytype == IEEE80211_T_FH) {
552 scan->fhdwell = LE_READ_2(&frm[2]);
553 scan->chan = IEEE80211_FH_CHAN(frm[4], frm[5]);
554 scan->fhindex = frm[6];
555 }
556 break;
557 case IEEE80211_ELEMID_DSPARMS:
558 /*
559 * XXX hack this since depending on phytype
560 * is problematic for multi-mode devices.
561 */
562 if (ic->ic_phytype != IEEE80211_T_FH)
563 scan->chan = frm[2];
564 break;
565 case IEEE80211_ELEMID_TIM:
566 /* XXX ATIM? */
567 scan->tim = frm;
568 scan->timoff = frm - mtod(m, uint8_t *);
569 break;
570 case IEEE80211_ELEMID_IBSSPARMS:
571 case IEEE80211_ELEMID_CFPARMS:
572 case IEEE80211_ELEMID_PWRCNSTR:
|
| 573 case IEEE80211_ELEMID_BSSLOAD:
574 case IEEE80211_ELEMID_APCHANREP:
|
573 /* NB: avoid debugging complaints */
574 break;
575 case IEEE80211_ELEMID_XRATES:
576 scan->xrates = frm;
577 break;
578 case IEEE80211_ELEMID_ERP:
579 if (frm[1] != 1) {
580 IEEE80211_DISCARD_IE(vap,
581 IEEE80211_MSG_ELEMID, wh, "ERP",
582 "bad len %u", frm[1]);
583 vap->iv_stats.is_rx_elem_toobig++;
584 break;
585 }
586 scan->erp = frm[2] | 0x100;
587 break;
588 case IEEE80211_ELEMID_HTCAP:
589 scan->htcap = frm;
590 break;
591 case IEEE80211_ELEMID_RSN:
592 scan->rsn = frm;
593 break;
594 case IEEE80211_ELEMID_HTINFO:
595 scan->htinfo = frm;
596 break;
597#ifdef IEEE80211_SUPPORT_MESH
598 case IEEE80211_ELEMID_MESHID:
599 scan->meshid = frm;
600 break;
601 case IEEE80211_ELEMID_MESHCONF:
602 scan->meshconf = frm;
603 break;
| 575 /* NB: avoid debugging complaints */
576 break;
577 case IEEE80211_ELEMID_XRATES:
578 scan->xrates = frm;
579 break;
580 case IEEE80211_ELEMID_ERP:
581 if (frm[1] != 1) {
582 IEEE80211_DISCARD_IE(vap,
583 IEEE80211_MSG_ELEMID, wh, "ERP",
584 "bad len %u", frm[1]);
585 vap->iv_stats.is_rx_elem_toobig++;
586 break;
587 }
588 scan->erp = frm[2] | 0x100;
589 break;
590 case IEEE80211_ELEMID_HTCAP:
591 scan->htcap = frm;
592 break;
593 case IEEE80211_ELEMID_RSN:
594 scan->rsn = frm;
595 break;
596 case IEEE80211_ELEMID_HTINFO:
597 scan->htinfo = frm;
598 break;
599#ifdef IEEE80211_SUPPORT_MESH
600 case IEEE80211_ELEMID_MESHID:
601 scan->meshid = frm;
602 break;
603 case IEEE80211_ELEMID_MESHCONF:
604 scan->meshconf = frm;
605 break;
|
| 606 case IEEE80211_ELEMID_MESHEXTCAP:
607 break;
|
604#endif
605 case IEEE80211_ELEMID_VENDOR:
606 if (iswpaoui(frm))
607 scan->wpa = frm;
608 else if (iswmeparam(frm) || iswmeinfo(frm))
609 scan->wme = frm;
610#ifdef IEEE80211_SUPPORT_SUPERG
611 else if (isatherosoui(frm))
612 scan->ath = frm;
613#endif
614#ifdef IEEE80211_SUPPORT_TDMA
615 else if (istdmaoui(frm))
616 scan->tdma = frm;
617#endif
618 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) {
619 /*
620 * Accept pre-draft HT ie's if the
621 * standard ones have not been seen.
622 */
623 if (ishtcapoui(frm)) {
624 if (scan->htcap == NULL)
625 scan->htcap = frm;
626 } else if (ishtinfooui(frm)) {
627 if (scan->htinfo == NULL)
628 scan->htcap = frm;
629 }
630 }
631 break;
632 default:
633 IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID,
634 wh, "unhandled",
635 "id %u, len %u", *frm, frm[1]);
636 vap->iv_stats.is_rx_elem_unknown++;
637 break;
638 }
639 frm += frm[1] + 2;
640 }
641 IEEE80211_VERIFY_ELEMENT(scan->rates, IEEE80211_RATE_MAXSIZE,
642 scan->status |= IEEE80211_BPARSE_RATES_INVALID);
643 if (scan->rates != NULL && scan->xrates != NULL) {
644 /*
645 * NB: don't process XRATES if RATES is missing. This
646 * avoids a potential null ptr deref and should be ok
647 * as the return code will already note RATES is missing
648 * (so callers shouldn't otherwise process the frame).
649 */
650 IEEE80211_VERIFY_ELEMENT(scan->xrates,
651 IEEE80211_RATE_MAXSIZE - scan->rates[1],
652 scan->status |= IEEE80211_BPARSE_XRATES_INVALID);
653 }
654 IEEE80211_VERIFY_ELEMENT(scan->ssid, IEEE80211_NWID_LEN,
655 scan->status |= IEEE80211_BPARSE_SSID_INVALID);
656 if (scan->chan != scan->bchan && ic->ic_phytype != IEEE80211_T_FH) {
657 /*
658 * Frame was received on a channel different from the
659 * one indicated in the DS params element id;
660 * silently discard it.
661 *
662 * NB: this can happen due to signal leakage.
663 * But we should take it for FH phy because
664 * the rssi value should be correct even for
665 * different hop pattern in FH.
666 */
667 IEEE80211_DISCARD(vap,
668 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
669 wh, NULL, "for off-channel %u (bchan=%u)",
670 scan->chan, scan->bchan);
671 vap->iv_stats.is_rx_chanmismatch++;
672 scan->status |= IEEE80211_BPARSE_OFFCHAN;
673 }
674 if (!(IEEE80211_BINTVAL_MIN <= scan->bintval &&
675 scan->bintval <= IEEE80211_BINTVAL_MAX)) {
676 IEEE80211_DISCARD(vap,
677 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
678 wh, NULL, "bogus beacon interval (%d TU)",
679 (int) scan->bintval);
680 vap->iv_stats.is_rx_badbintval++;
681 scan->status |= IEEE80211_BPARSE_BINTVAL_INVALID;
682 }
683 if (scan->country != NULL) {
684 /*
685 * Validate we have at least enough data to extract
686 * the country code. Not sure if we should return an
687 * error instead of discarding the IE; consider this
688 * being lenient as we don't depend on the data for
689 * correct operation.
690 */
691 IEEE80211_VERIFY_LENGTH(scan->country[1], 3 * sizeof(uint8_t),
692 scan->country = NULL);
693 }
694 if (scan->csa != NULL) {
695 /*
696 * Validate Channel Switch Announcement; this must
697 * be the correct length or we toss the frame.
698 */
699 IEEE80211_VERIFY_LENGTH(scan->csa[1], 3 * sizeof(uint8_t),
700 scan->status |= IEEE80211_BPARSE_CSA_INVALID);
701 }
702 /*
703 * Process HT ie's. This is complicated by our
704 * accepting both the standard ie's and the pre-draft
705 * vendor OUI ie's that some vendors still use/require.
706 */
707 if (scan->htcap != NULL) {
708 IEEE80211_VERIFY_LENGTH(scan->htcap[1],
709 scan->htcap[0] == IEEE80211_ELEMID_VENDOR ?
710 4 + sizeof(struct ieee80211_ie_htcap)-2 :
711 sizeof(struct ieee80211_ie_htcap)-2,
712 scan->htcap = NULL);
713 }
714 if (scan->htinfo != NULL) {
715 IEEE80211_VERIFY_LENGTH(scan->htinfo[1],
716 scan->htinfo[0] == IEEE80211_ELEMID_VENDOR ?
717 4 + sizeof(struct ieee80211_ie_htinfo)-2 :
718 sizeof(struct ieee80211_ie_htinfo)-2,
719 scan->htinfo = NULL);
720 }
721 return scan->status;
722}
723
724/*
725 * Parse an Action frame. Return 0 on success, non-zero on failure.
726 */
727int
728ieee80211_parse_action(struct ieee80211_node *ni, struct mbuf *m)
729{
730 struct ieee80211vap *vap = ni->ni_vap;
731 const struct ieee80211_action *ia;
732 struct ieee80211_frame *wh;
733 uint8_t *frm, *efrm;
734
735 /*
736 * action frame format:
737 * [1] category
738 * [1] action
739 * [tlv] parameters
740 */
741 wh = mtod(m, struct ieee80211_frame *);
742 frm = (u_int8_t *)&wh[1];
743 efrm = mtod(m, u_int8_t *) + m->m_len;
744 IEEE80211_VERIFY_LENGTH(efrm - frm,
745 sizeof(struct ieee80211_action), return EINVAL);
746 ia = (const struct ieee80211_action *) frm;
747
748 vap->iv_stats.is_rx_action++;
749 IEEE80211_NODE_STAT(ni, rx_action);
750
751 /* verify frame payloads but defer processing */
752 switch (ia->ia_category) {
753 case IEEE80211_ACTION_CAT_BA:
754 switch (ia->ia_action) {
755 case IEEE80211_ACTION_BA_ADDBA_REQUEST:
756 IEEE80211_VERIFY_LENGTH(efrm - frm,
757 sizeof(struct ieee80211_action_ba_addbarequest),
758 return EINVAL);
759 break;
760 case IEEE80211_ACTION_BA_ADDBA_RESPONSE:
761 IEEE80211_VERIFY_LENGTH(efrm - frm,
762 sizeof(struct ieee80211_action_ba_addbaresponse),
763 return EINVAL);
764 break;
765 case IEEE80211_ACTION_BA_DELBA:
766 IEEE80211_VERIFY_LENGTH(efrm - frm,
767 sizeof(struct ieee80211_action_ba_delba),
768 return EINVAL);
769 break;
770 }
771 break;
772 case IEEE80211_ACTION_CAT_HT:
773 switch (ia->ia_action) {
774 case IEEE80211_ACTION_HT_TXCHWIDTH:
775 IEEE80211_VERIFY_LENGTH(efrm - frm,
776 sizeof(struct ieee80211_action_ht_txchwidth),
777 return EINVAL);
778 break;
779 case IEEE80211_ACTION_HT_MIMOPWRSAVE:
780 IEEE80211_VERIFY_LENGTH(efrm - frm,
781 sizeof(struct ieee80211_action_ht_mimopowersave),
782 return EINVAL);
783 break;
784 }
785 break;
786#ifdef IEEE80211_SUPPORT_MESH
787 case IEEE80211_ACTION_CAT_MESH:
788 switch (ia->ia_action) {
789 case IEEE80211_ACTION_MESH_LMETRIC:
790 /*
791 * XXX: verification is true only if we are using
792 * Airtime link metric (default)
793 */
794 IEEE80211_VERIFY_LENGTH(efrm - frm,
795 sizeof(struct ieee80211_meshlmetric_ie),
796 return EINVAL);
797 break;
798 case IEEE80211_ACTION_MESH_HWMP:
799 /* verify something */
800 break;
801 case IEEE80211_ACTION_MESH_GANN:
802 IEEE80211_VERIFY_LENGTH(efrm - frm,
803 sizeof(struct ieee80211_meshgann_ie),
804 return EINVAL);
805 break;
806 case IEEE80211_ACTION_MESH_CC:
807 case IEEE80211_ACTION_MESH_MCCA_SREQ:
808 case IEEE80211_ACTION_MESH_MCCA_SREP:
809 case IEEE80211_ACTION_MESH_MCCA_AREQ:
810 case IEEE80211_ACTION_MESH_MCCA_ADVER:
811 case IEEE80211_ACTION_MESH_MCCA_TRDOWN:
812 case IEEE80211_ACTION_MESH_TBTT_REQ:
813 case IEEE80211_ACTION_MESH_TBTT_RES:
814 /* reject these early on, not implemented */
815 IEEE80211_DISCARD(vap,
816 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
817 wh, NULL, "not implemented yet, act=0x%02X",
818 ia->ia_action);
819 return EINVAL;
820 }
821 break;
822 case IEEE80211_ACTION_CAT_SELF_PROT:
823 /* If TA or RA group address discard silently */
824 if (IEEE80211_IS_MULTICAST(wh->i_addr1) ||
825 IEEE80211_IS_MULTICAST(wh->i_addr2))
826 return EINVAL;
827 /*
828 * XXX: Should we verify complete length now or it is
829 * to varying in sizes?
830 */
831 switch (ia->ia_action) {
832 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
833 case IEEE80211_ACTION_MESHPEERING_CLOSE:
834 /* is not a peering candidate (yet) */
835 if (ni == vap->iv_bss)
836 return EINVAL;
837 break;
838 }
839 break;
840#endif
841 }
842 return 0;
843}
844
845#ifdef IEEE80211_DEBUG
846/*
847 * Debugging support.
848 */
849void
850ieee80211_ssid_mismatch(struct ieee80211vap *vap, const char *tag,
851 uint8_t mac[IEEE80211_ADDR_LEN], uint8_t *ssid)
852{
853 printf("[%s] discard %s frame, ssid mismatch: ",
854 ether_sprintf(mac), tag);
855 ieee80211_print_essid(ssid + 2, ssid[1]);
856 printf("\n");
857}
858
859/*
860 * Return the bssid of a frame.
861 */
862static const uint8_t *
863ieee80211_getbssid(const struct ieee80211vap *vap,
864 const struct ieee80211_frame *wh)
865{
866 if (vap->iv_opmode == IEEE80211_M_STA)
867 return wh->i_addr2;
868 if ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) != IEEE80211_FC1_DIR_NODS)
869 return wh->i_addr1;
870 if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL)
871 return wh->i_addr1;
872 return wh->i_addr3;
873}
874
875#include <machine/stdarg.h>
876
877void
878ieee80211_note(const struct ieee80211vap *vap, const char *fmt, ...)
879{
880 char buf[128]; /* XXX */
881 va_list ap;
882
883 va_start(ap, fmt);
884 vsnprintf(buf, sizeof(buf), fmt, ap);
885 va_end(ap);
886
887 if_printf(vap->iv_ifp, "%s", buf); /* NB: no \n */
888}
889
890void
891ieee80211_note_frame(const struct ieee80211vap *vap,
892 const struct ieee80211_frame *wh,
893 const char *fmt, ...)
894{
895 char buf[128]; /* XXX */
896 va_list ap;
897
898 va_start(ap, fmt);
899 vsnprintf(buf, sizeof(buf), fmt, ap);
900 va_end(ap);
901 if_printf(vap->iv_ifp, "[%s] %s\n",
902 ether_sprintf(ieee80211_getbssid(vap, wh)), buf);
903}
904
905void
906ieee80211_note_mac(const struct ieee80211vap *vap,
907 const uint8_t mac[IEEE80211_ADDR_LEN],
908 const char *fmt, ...)
909{
910 char buf[128]; /* XXX */
911 va_list ap;
912
913 va_start(ap, fmt);
914 vsnprintf(buf, sizeof(buf), fmt, ap);
915 va_end(ap);
916 if_printf(vap->iv_ifp, "[%s] %s\n", ether_sprintf(mac), buf);
917}
918
919void
920ieee80211_discard_frame(const struct ieee80211vap *vap,
921 const struct ieee80211_frame *wh,
922 const char *type, const char *fmt, ...)
923{
924 va_list ap;
925
926 if_printf(vap->iv_ifp, "[%s] discard ",
927 ether_sprintf(ieee80211_getbssid(vap, wh)));
928 if (type == NULL) {
929 printf("%s frame, ", ieee80211_mgt_subtype_name[
930 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) >>
931 IEEE80211_FC0_SUBTYPE_SHIFT]);
932 } else
933 printf("%s frame, ", type);
934 va_start(ap, fmt);
935 vprintf(fmt, ap);
936 va_end(ap);
937 printf("\n");
938}
939
940void
941ieee80211_discard_ie(const struct ieee80211vap *vap,
942 const struct ieee80211_frame *wh,
943 const char *type, const char *fmt, ...)
944{
945 va_list ap;
946
947 if_printf(vap->iv_ifp, "[%s] discard ",
948 ether_sprintf(ieee80211_getbssid(vap, wh)));
949 if (type != NULL)
950 printf("%s information element, ", type);
951 else
952 printf("information element, ");
953 va_start(ap, fmt);
954 vprintf(fmt, ap);
955 va_end(ap);
956 printf("\n");
957}
958
959void
960ieee80211_discard_mac(const struct ieee80211vap *vap,
961 const uint8_t mac[IEEE80211_ADDR_LEN],
962 const char *type, const char *fmt, ...)
963{
964 va_list ap;
965
966 if_printf(vap->iv_ifp, "[%s] discard ", ether_sprintf(mac));
967 if (type != NULL)
968 printf("%s frame, ", type);
969 else
970 printf("frame, ");
971 va_start(ap, fmt);
972 vprintf(fmt, ap);
973 va_end(ap);
974 printf("\n");
975}
976#endif /* IEEE80211_DEBUG */
| 608#endif
609 case IEEE80211_ELEMID_VENDOR:
610 if (iswpaoui(frm))
611 scan->wpa = frm;
612 else if (iswmeparam(frm) || iswmeinfo(frm))
613 scan->wme = frm;
614#ifdef IEEE80211_SUPPORT_SUPERG
615 else if (isatherosoui(frm))
616 scan->ath = frm;
617#endif
618#ifdef IEEE80211_SUPPORT_TDMA
619 else if (istdmaoui(frm))
620 scan->tdma = frm;
621#endif
622 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) {
623 /*
624 * Accept pre-draft HT ie's if the
625 * standard ones have not been seen.
626 */
627 if (ishtcapoui(frm)) {
628 if (scan->htcap == NULL)
629 scan->htcap = frm;
630 } else if (ishtinfooui(frm)) {
631 if (scan->htinfo == NULL)
632 scan->htcap = frm;
633 }
634 }
635 break;
636 default:
637 IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID,
638 wh, "unhandled",
639 "id %u, len %u", *frm, frm[1]);
640 vap->iv_stats.is_rx_elem_unknown++;
641 break;
642 }
643 frm += frm[1] + 2;
644 }
645 IEEE80211_VERIFY_ELEMENT(scan->rates, IEEE80211_RATE_MAXSIZE,
646 scan->status |= IEEE80211_BPARSE_RATES_INVALID);
647 if (scan->rates != NULL && scan->xrates != NULL) {
648 /*
649 * NB: don't process XRATES if RATES is missing. This
650 * avoids a potential null ptr deref and should be ok
651 * as the return code will already note RATES is missing
652 * (so callers shouldn't otherwise process the frame).
653 */
654 IEEE80211_VERIFY_ELEMENT(scan->xrates,
655 IEEE80211_RATE_MAXSIZE - scan->rates[1],
656 scan->status |= IEEE80211_BPARSE_XRATES_INVALID);
657 }
658 IEEE80211_VERIFY_ELEMENT(scan->ssid, IEEE80211_NWID_LEN,
659 scan->status |= IEEE80211_BPARSE_SSID_INVALID);
660 if (scan->chan != scan->bchan && ic->ic_phytype != IEEE80211_T_FH) {
661 /*
662 * Frame was received on a channel different from the
663 * one indicated in the DS params element id;
664 * silently discard it.
665 *
666 * NB: this can happen due to signal leakage.
667 * But we should take it for FH phy because
668 * the rssi value should be correct even for
669 * different hop pattern in FH.
670 */
671 IEEE80211_DISCARD(vap,
672 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
673 wh, NULL, "for off-channel %u (bchan=%u)",
674 scan->chan, scan->bchan);
675 vap->iv_stats.is_rx_chanmismatch++;
676 scan->status |= IEEE80211_BPARSE_OFFCHAN;
677 }
678 if (!(IEEE80211_BINTVAL_MIN <= scan->bintval &&
679 scan->bintval <= IEEE80211_BINTVAL_MAX)) {
680 IEEE80211_DISCARD(vap,
681 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
682 wh, NULL, "bogus beacon interval (%d TU)",
683 (int) scan->bintval);
684 vap->iv_stats.is_rx_badbintval++;
685 scan->status |= IEEE80211_BPARSE_BINTVAL_INVALID;
686 }
687 if (scan->country != NULL) {
688 /*
689 * Validate we have at least enough data to extract
690 * the country code. Not sure if we should return an
691 * error instead of discarding the IE; consider this
692 * being lenient as we don't depend on the data for
693 * correct operation.
694 */
695 IEEE80211_VERIFY_LENGTH(scan->country[1], 3 * sizeof(uint8_t),
696 scan->country = NULL);
697 }
698 if (scan->csa != NULL) {
699 /*
700 * Validate Channel Switch Announcement; this must
701 * be the correct length or we toss the frame.
702 */
703 IEEE80211_VERIFY_LENGTH(scan->csa[1], 3 * sizeof(uint8_t),
704 scan->status |= IEEE80211_BPARSE_CSA_INVALID);
705 }
706 /*
707 * Process HT ie's. This is complicated by our
708 * accepting both the standard ie's and the pre-draft
709 * vendor OUI ie's that some vendors still use/require.
710 */
711 if (scan->htcap != NULL) {
712 IEEE80211_VERIFY_LENGTH(scan->htcap[1],
713 scan->htcap[0] == IEEE80211_ELEMID_VENDOR ?
714 4 + sizeof(struct ieee80211_ie_htcap)-2 :
715 sizeof(struct ieee80211_ie_htcap)-2,
716 scan->htcap = NULL);
717 }
718 if (scan->htinfo != NULL) {
719 IEEE80211_VERIFY_LENGTH(scan->htinfo[1],
720 scan->htinfo[0] == IEEE80211_ELEMID_VENDOR ?
721 4 + sizeof(struct ieee80211_ie_htinfo)-2 :
722 sizeof(struct ieee80211_ie_htinfo)-2,
723 scan->htinfo = NULL);
724 }
725 return scan->status;
726}
727
728/*
729 * Parse an Action frame. Return 0 on success, non-zero on failure.
730 */
731int
732ieee80211_parse_action(struct ieee80211_node *ni, struct mbuf *m)
733{
734 struct ieee80211vap *vap = ni->ni_vap;
735 const struct ieee80211_action *ia;
736 struct ieee80211_frame *wh;
737 uint8_t *frm, *efrm;
738
739 /*
740 * action frame format:
741 * [1] category
742 * [1] action
743 * [tlv] parameters
744 */
745 wh = mtod(m, struct ieee80211_frame *);
746 frm = (u_int8_t *)&wh[1];
747 efrm = mtod(m, u_int8_t *) + m->m_len;
748 IEEE80211_VERIFY_LENGTH(efrm - frm,
749 sizeof(struct ieee80211_action), return EINVAL);
750 ia = (const struct ieee80211_action *) frm;
751
752 vap->iv_stats.is_rx_action++;
753 IEEE80211_NODE_STAT(ni, rx_action);
754
755 /* verify frame payloads but defer processing */
756 switch (ia->ia_category) {
757 case IEEE80211_ACTION_CAT_BA:
758 switch (ia->ia_action) {
759 case IEEE80211_ACTION_BA_ADDBA_REQUEST:
760 IEEE80211_VERIFY_LENGTH(efrm - frm,
761 sizeof(struct ieee80211_action_ba_addbarequest),
762 return EINVAL);
763 break;
764 case IEEE80211_ACTION_BA_ADDBA_RESPONSE:
765 IEEE80211_VERIFY_LENGTH(efrm - frm,
766 sizeof(struct ieee80211_action_ba_addbaresponse),
767 return EINVAL);
768 break;
769 case IEEE80211_ACTION_BA_DELBA:
770 IEEE80211_VERIFY_LENGTH(efrm - frm,
771 sizeof(struct ieee80211_action_ba_delba),
772 return EINVAL);
773 break;
774 }
775 break;
776 case IEEE80211_ACTION_CAT_HT:
777 switch (ia->ia_action) {
778 case IEEE80211_ACTION_HT_TXCHWIDTH:
779 IEEE80211_VERIFY_LENGTH(efrm - frm,
780 sizeof(struct ieee80211_action_ht_txchwidth),
781 return EINVAL);
782 break;
783 case IEEE80211_ACTION_HT_MIMOPWRSAVE:
784 IEEE80211_VERIFY_LENGTH(efrm - frm,
785 sizeof(struct ieee80211_action_ht_mimopowersave),
786 return EINVAL);
787 break;
788 }
789 break;
790#ifdef IEEE80211_SUPPORT_MESH
791 case IEEE80211_ACTION_CAT_MESH:
792 switch (ia->ia_action) {
793 case IEEE80211_ACTION_MESH_LMETRIC:
794 /*
795 * XXX: verification is true only if we are using
796 * Airtime link metric (default)
797 */
798 IEEE80211_VERIFY_LENGTH(efrm - frm,
799 sizeof(struct ieee80211_meshlmetric_ie),
800 return EINVAL);
801 break;
802 case IEEE80211_ACTION_MESH_HWMP:
803 /* verify something */
804 break;
805 case IEEE80211_ACTION_MESH_GANN:
806 IEEE80211_VERIFY_LENGTH(efrm - frm,
807 sizeof(struct ieee80211_meshgann_ie),
808 return EINVAL);
809 break;
810 case IEEE80211_ACTION_MESH_CC:
811 case IEEE80211_ACTION_MESH_MCCA_SREQ:
812 case IEEE80211_ACTION_MESH_MCCA_SREP:
813 case IEEE80211_ACTION_MESH_MCCA_AREQ:
814 case IEEE80211_ACTION_MESH_MCCA_ADVER:
815 case IEEE80211_ACTION_MESH_MCCA_TRDOWN:
816 case IEEE80211_ACTION_MESH_TBTT_REQ:
817 case IEEE80211_ACTION_MESH_TBTT_RES:
818 /* reject these early on, not implemented */
819 IEEE80211_DISCARD(vap,
820 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
821 wh, NULL, "not implemented yet, act=0x%02X",
822 ia->ia_action);
823 return EINVAL;
824 }
825 break;
826 case IEEE80211_ACTION_CAT_SELF_PROT:
827 /* If TA or RA group address discard silently */
828 if (IEEE80211_IS_MULTICAST(wh->i_addr1) ||
829 IEEE80211_IS_MULTICAST(wh->i_addr2))
830 return EINVAL;
831 /*
832 * XXX: Should we verify complete length now or it is
833 * to varying in sizes?
834 */
835 switch (ia->ia_action) {
836 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
837 case IEEE80211_ACTION_MESHPEERING_CLOSE:
838 /* is not a peering candidate (yet) */
839 if (ni == vap->iv_bss)
840 return EINVAL;
841 break;
842 }
843 break;
844#endif
845 }
846 return 0;
847}
848
849#ifdef IEEE80211_DEBUG
850/*
851 * Debugging support.
852 */
853void
854ieee80211_ssid_mismatch(struct ieee80211vap *vap, const char *tag,
855 uint8_t mac[IEEE80211_ADDR_LEN], uint8_t *ssid)
856{
857 printf("[%s] discard %s frame, ssid mismatch: ",
858 ether_sprintf(mac), tag);
859 ieee80211_print_essid(ssid + 2, ssid[1]);
860 printf("\n");
861}
862
863/*
864 * Return the bssid of a frame.
865 */
866static const uint8_t *
867ieee80211_getbssid(const struct ieee80211vap *vap,
868 const struct ieee80211_frame *wh)
869{
870 if (vap->iv_opmode == IEEE80211_M_STA)
871 return wh->i_addr2;
872 if ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) != IEEE80211_FC1_DIR_NODS)
873 return wh->i_addr1;
874 if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL)
875 return wh->i_addr1;
876 return wh->i_addr3;
877}
878
879#include <machine/stdarg.h>
880
881void
882ieee80211_note(const struct ieee80211vap *vap, const char *fmt, ...)
883{
884 char buf[128]; /* XXX */
885 va_list ap;
886
887 va_start(ap, fmt);
888 vsnprintf(buf, sizeof(buf), fmt, ap);
889 va_end(ap);
890
891 if_printf(vap->iv_ifp, "%s", buf); /* NB: no \n */
892}
893
894void
895ieee80211_note_frame(const struct ieee80211vap *vap,
896 const struct ieee80211_frame *wh,
897 const char *fmt, ...)
898{
899 char buf[128]; /* XXX */
900 va_list ap;
901
902 va_start(ap, fmt);
903 vsnprintf(buf, sizeof(buf), fmt, ap);
904 va_end(ap);
905 if_printf(vap->iv_ifp, "[%s] %s\n",
906 ether_sprintf(ieee80211_getbssid(vap, wh)), buf);
907}
908
909void
910ieee80211_note_mac(const struct ieee80211vap *vap,
911 const uint8_t mac[IEEE80211_ADDR_LEN],
912 const char *fmt, ...)
913{
914 char buf[128]; /* XXX */
915 va_list ap;
916
917 va_start(ap, fmt);
918 vsnprintf(buf, sizeof(buf), fmt, ap);
919 va_end(ap);
920 if_printf(vap->iv_ifp, "[%s] %s\n", ether_sprintf(mac), buf);
921}
922
923void
924ieee80211_discard_frame(const struct ieee80211vap *vap,
925 const struct ieee80211_frame *wh,
926 const char *type, const char *fmt, ...)
927{
928 va_list ap;
929
930 if_printf(vap->iv_ifp, "[%s] discard ",
931 ether_sprintf(ieee80211_getbssid(vap, wh)));
932 if (type == NULL) {
933 printf("%s frame, ", ieee80211_mgt_subtype_name[
934 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) >>
935 IEEE80211_FC0_SUBTYPE_SHIFT]);
936 } else
937 printf("%s frame, ", type);
938 va_start(ap, fmt);
939 vprintf(fmt, ap);
940 va_end(ap);
941 printf("\n");
942}
943
944void
945ieee80211_discard_ie(const struct ieee80211vap *vap,
946 const struct ieee80211_frame *wh,
947 const char *type, const char *fmt, ...)
948{
949 va_list ap;
950
951 if_printf(vap->iv_ifp, "[%s] discard ",
952 ether_sprintf(ieee80211_getbssid(vap, wh)));
953 if (type != NULL)
954 printf("%s information element, ", type);
955 else
956 printf("information element, ");
957 va_start(ap, fmt);
958 vprintf(fmt, ap);
959 va_end(ap);
960 printf("\n");
961}
962
963void
964ieee80211_discard_mac(const struct ieee80211vap *vap,
965 const uint8_t mac[IEEE80211_ADDR_LEN],
966 const char *type, const char *fmt, ...)
967{
968 va_list ap;
969
970 if_printf(vap->iv_ifp, "[%s] discard ", ether_sprintf(mac));
971 if (type != NULL)
972 printf("%s frame, ", type);
973 else
974 printf("frame, ");
975 va_start(ap, fmt);
976 vprintf(fmt, ap);
977 va_end(ap);
978 printf("\n");
979}
980#endif /* IEEE80211_DEBUG */
|