2 * Copyright (c) 2001 Atsushi Onoe
3 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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.
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.
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
35 #include <sys/malloc.h>
36 #include <sys/endian.h>
37 #include <sys/kernel.h>
39 #include <sys/socket.h>
41 #include <net/ethernet.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>
48 #include <net80211/ieee80211_var.h>
49 #include <net80211/ieee80211_input.h>
50 #ifdef IEEE80211_SUPPORT_MESH
51 #include <net80211/ieee80211_mesh.h>
57 #include <netinet/in.h>
58 #include <net/ethernet.h>
62 ieee80211_process_mimo(struct ieee80211_node *ni, struct ieee80211_rx_stats *rx)
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))
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]);
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];
82 ni->ni_mimo_chains = rx->c_chain;
86 ieee80211_input_mimo(struct ieee80211_node *ni, struct mbuf *m,
87 struct ieee80211_rx_stats *rx)
89 struct ieee80211_rx_stats rxs;
92 memcpy(&rxs, rx, sizeof(*rx));
94 /* try to read from mbuf */
95 bzero(&rxs, sizeof(rxs));
96 ieee80211_get_rx_params(m, &rxs);
99 /* XXX should assert IEEE80211_R_NF and IEEE80211_R_RSSI are set */
100 ieee80211_process_mimo(ni, &rxs);
102 //return ieee80211_input(ni, m, rx->rssi, rx->nf);
103 return ni->ni_vap->iv_input(ni, m, &rxs, rxs.rssi, rxs.nf);
107 ieee80211_input_all(struct ieee80211com *ic, struct mbuf *m, int rssi, int nf)
109 struct ieee80211_rx_stats rx;
111 rx.r_flags = IEEE80211_R_NF | IEEE80211_R_RSSI;
114 return ieee80211_input_mimo_all(ic, m, &rx);
118 ieee80211_input_mimo_all(struct ieee80211com *ic, struct mbuf *m,
119 struct ieee80211_rx_stats *rx)
121 struct ieee80211_rx_stats rxs;
122 struct ieee80211vap *vap;
125 m->m_flags |= M_BCAST; /* NB: mark for bpf tap'ing */
128 memcpy(&rxs, rx, sizeof(*rx));
130 /* try to read from mbuf */
131 bzero(&rxs, sizeof(rxs));
132 ieee80211_get_rx_params(m, &rxs);
136 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
137 struct ieee80211_node *ni;
140 /* NB: could check for IFF_UP but this is cheaper */
141 if (vap->iv_state == IEEE80211_S_INIT)
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.
149 if (vap->iv_opmode == IEEE80211_M_WDS)
151 if (TAILQ_NEXT(vap, iv_next) != NULL) {
153 * Packet contents are changed by ieee80211_decap
154 * so do a deep copy of the packet.
156 mcopy = m_dup(m, M_NOWAIT);
165 ni = ieee80211_ref_node(vap->iv_bss);
166 type = ieee80211_input_mimo(ni, mcopy, &rxs);
167 ieee80211_free_node(ni);
169 if (m != NULL) /* no vaps, reclaim mbuf */
175 * This function reassembles fragments.
177 * XXX should handle 3 concurrent reassemblies per-spec.
180 ieee80211_defrag(struct ieee80211_node *ni, struct mbuf *m, int hdrspace)
182 struct ieee80211vap *vap = ni->ni_vap;
183 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
184 struct ieee80211_frame *lwh;
187 uint8_t more_frag = wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG;
190 KASSERT(!IEEE80211_IS_MULTICAST(wh->i_addr1), ("multicast fragm?"));
192 rxseq = le16toh(*(uint16_t *)wh->i_seq);
193 fragno = rxseq & IEEE80211_SEQ_FRAG_MASK;
195 /* Quick way out, if there's nothing to defragment */
196 if (!more_frag && fragno == 0 && ni->ni_rxfrag[0] == NULL)
200 * Remove frag to insure it doesn't get reaped by timer.
202 if (ni->ni_table == NULL) {
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
211 /* XXX need msg+stat */
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);
221 * Validate new fragment is in order and
222 * related to the previous ones.
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)) {
234 * Unrelated fragment or no space for it,
235 * clear current fragments.
243 if (fragno != 0) { /* !first fragment, discard */
244 vap->iv_stats.is_rx_defrag++;
245 IEEE80211_NODE_STAT(ni, rx_defrag);
250 } else { /* concatenate */
251 m_adj(m, hdrspace); /* strip header */
253 /* track last seqnum and fragno */
254 lwh = mtod(mfrag, struct ieee80211_frame *);
255 *(uint16_t *) lwh->i_seq = *(uint16_t *) wh->i_seq;
257 if (more_frag) { /* more to come, save */
258 ni->ni_rxfragstamp = ticks;
259 ni->ni_rxfrag[0] = mfrag;
266 ieee80211_deliver_data(struct ieee80211vap *vap,
267 struct ieee80211_node *ni, struct mbuf *m)
269 struct ether_header *eh = mtod(m, struct ether_header *);
270 struct ifnet *ifp = vap->iv_ifp;
272 /* clear driver/net80211 flags before passing up */
273 m->m_flags &= ~(M_MCAST | M_BCAST);
276 /* NB: see hostap_deliver_data, this path doesn't handle hostap */
277 KASSERT(vap->iv_opmode != IEEE80211_M_HOSTAP, ("gack, hostap"));
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);
288 IEEE80211_NODE_STAT(ni, rx_ucast);
289 m->m_pkthdr.rcvif = ifp;
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;
296 ifp->if_input(ifp, m);
300 ieee80211_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen)
302 struct ieee80211_qosframe_addr4 wh;
303 struct ether_header *eh;
306 KASSERT(hdrlen <= sizeof(wh),
307 ("hdrlen %d > max %zd", hdrlen, sizeof(wh)));
309 if (m->m_len < hdrlen + sizeof(*llc) &&
310 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
311 vap->iv_stats.is_rx_tooshort++;
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));
326 m_adj(m, hdrlen - sizeof(*eh));
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);
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);
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);
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);
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));
353 #endif /* !__NO_STRICT_ALIGNMENT */
355 eh = mtod(m, struct ether_header *);
356 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
362 * Decap a frame encapsulated in a fast-frame/A-MSDU.
365 ieee80211_decap1(struct mbuf *m, int *framelen)
367 #define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc))
368 struct ether_header *eh;
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.
379 if (m->m_len < FF_LLC_SIZE && (m = m_pullup(m, FF_LLC_SIZE)) == 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));
394 * Install received rate set information in the node's state block.
397 ieee80211_setup_rates(struct ieee80211_node *ni,
398 const uint8_t *rates, const uint8_t *xrates, int flags)
400 struct ieee80211vap *vap = ni->ni_vap;
401 struct ieee80211_rateset *rs = &ni->ni_rates;
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) {
409 * Tack on 11g extended supported rate element.
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++;
419 memcpy(rs->rs_rates + rs->rs_nrates, xrates+2, nxrates);
420 rs->rs_nrates += nxrates;
422 return ieee80211_fix_rate(ni, rs, flags);
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.
433 ieee80211_send_error(struct ieee80211_node *ni,
434 const uint8_t mac[IEEE80211_ADDR_LEN], int subtype, int arg)
436 struct ieee80211vap *vap = ni->ni_vap;
439 if (ni == vap->iv_bss) {
440 if (vap->iv_state != IEEE80211_S_RUN) {
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
451 ni = ieee80211_tmp_node(vap, mac);
459 IEEE80211_SEND_MGMT(ni, subtype, arg);
461 ieee80211_free_node(ni);
465 ieee80211_alloc_challenge(struct ieee80211_node *ni)
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");
477 return (ni->ni_challenge != NULL);
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.
488 ieee80211_parse_beacon(struct ieee80211_node *ni, struct mbuf *m,
489 struct ieee80211_channel *rxchan, struct ieee80211_scanparams *scan)
491 struct ieee80211vap *vap = ni->ni_vap;
492 struct ieee80211com *ic = ni->ni_ic;
493 struct ieee80211_frame *wh;
496 wh = mtod(m, struct ieee80211_frame *);
497 frm = (uint8_t *)&wh[1];
498 efrm = mtod(m, uint8_t *) + m->m_len;
501 * beacon/probe response frame format
503 * [2] beacon interval
504 * [2] capability information
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
514 * [tlv] HT capabilities
515 * [tlv] HT information
516 * [tlv] Atheros capabilities
518 * [tlv] Mesh Configuration
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;
529 scan->ies_len = efrm - frm;
531 while (efrm - frm > 1) {
532 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2,
533 return (scan->status = IEEE80211_BPARSE_BADIELEN));
535 case IEEE80211_ELEMID_SSID:
538 case IEEE80211_ELEMID_RATES:
541 case IEEE80211_ELEMID_COUNTRY:
544 case IEEE80211_ELEMID_CSA:
547 case IEEE80211_ELEMID_QUIET:
550 case IEEE80211_ELEMID_FHPARMS:
551 if (ic->ic_phytype == IEEE80211_T_FH) {
552 scan->fhdwell = le16dec(&frm[2]);
553 scan->chan = IEEE80211_FH_CHAN(frm[4], frm[5]);
554 scan->fhindex = frm[6];
557 case IEEE80211_ELEMID_DSPARMS:
559 * XXX hack this since depending on phytype
560 * is problematic for multi-mode devices.
562 if (ic->ic_phytype != IEEE80211_T_FH)
565 case IEEE80211_ELEMID_TIM:
568 scan->timoff = frm - mtod(m, uint8_t *);
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:
575 /* NB: avoid debugging complaints */
577 case IEEE80211_ELEMID_XRATES:
580 case IEEE80211_ELEMID_ERP:
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++;
588 scan->erp = frm[2] | 0x100;
590 case IEEE80211_ELEMID_HTCAP:
593 case IEEE80211_ELEMID_RSN:
596 case IEEE80211_ELEMID_HTINFO:
599 #ifdef IEEE80211_SUPPORT_MESH
600 case IEEE80211_ELEMID_MESHID:
603 case IEEE80211_ELEMID_MESHCONF:
604 scan->meshconf = frm;
607 /* Extended capabilities; nothing handles it for now */
608 case IEEE80211_ELEMID_EXTCAP:
610 case IEEE80211_ELEMID_VENDOR:
613 else if (iswmeparam(frm) || iswmeinfo(frm))
615 #ifdef IEEE80211_SUPPORT_SUPERG
616 else if (isatherosoui(frm))
619 #ifdef IEEE80211_SUPPORT_TDMA
620 else if (istdmaoui(frm))
623 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) {
625 * Accept pre-draft HT ie's if the
626 * standard ones have not been seen.
628 if (ishtcapoui(frm)) {
629 if (scan->htcap == NULL)
631 } else if (ishtinfooui(frm)) {
632 if (scan->htinfo == NULL)
638 IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID,
640 "id %u, len %u", *frm, frm[1]);
641 vap->iv_stats.is_rx_elem_unknown++;
646 IEEE80211_VERIFY_ELEMENT(scan->rates, IEEE80211_RATE_MAXSIZE,
647 scan->status |= IEEE80211_BPARSE_RATES_INVALID);
648 if (scan->rates != NULL && scan->xrates != NULL) {
650 * NB: don't process XRATES if RATES is missing. This
651 * avoids a potential null ptr deref and should be ok
652 * as the return code will already note RATES is missing
653 * (so callers shouldn't otherwise process the frame).
655 IEEE80211_VERIFY_ELEMENT(scan->xrates,
656 IEEE80211_RATE_MAXSIZE - scan->rates[1],
657 scan->status |= IEEE80211_BPARSE_XRATES_INVALID);
659 IEEE80211_VERIFY_ELEMENT(scan->ssid, IEEE80211_NWID_LEN,
660 scan->status |= IEEE80211_BPARSE_SSID_INVALID);
661 if (scan->chan != scan->bchan && ic->ic_phytype != IEEE80211_T_FH) {
663 * Frame was received on a channel different from the
664 * one indicated in the DS params element id;
665 * silently discard it.
667 * NB: this can happen due to signal leakage.
668 * But we should take it for FH phy because
669 * the rssi value should be correct even for
670 * different hop pattern in FH.
672 IEEE80211_DISCARD(vap,
673 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
674 wh, NULL, "for off-channel %u (bchan=%u)",
675 scan->chan, scan->bchan);
676 vap->iv_stats.is_rx_chanmismatch++;
677 scan->status |= IEEE80211_BPARSE_OFFCHAN;
679 if (!(IEEE80211_BINTVAL_MIN <= scan->bintval &&
680 scan->bintval <= IEEE80211_BINTVAL_MAX)) {
681 IEEE80211_DISCARD(vap,
682 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
683 wh, NULL, "bogus beacon interval (%d TU)",
684 (int) scan->bintval);
685 vap->iv_stats.is_rx_badbintval++;
686 scan->status |= IEEE80211_BPARSE_BINTVAL_INVALID;
688 if (scan->country != NULL) {
690 * Validate we have at least enough data to extract
691 * the country code. Not sure if we should return an
692 * error instead of discarding the IE; consider this
693 * being lenient as we don't depend on the data for
696 IEEE80211_VERIFY_LENGTH(scan->country[1], 3 * sizeof(uint8_t),
697 scan->country = NULL);
699 if (scan->csa != NULL) {
701 * Validate Channel Switch Announcement; this must
702 * be the correct length or we toss the frame.
704 IEEE80211_VERIFY_LENGTH(scan->csa[1], 3 * sizeof(uint8_t),
705 scan->status |= IEEE80211_BPARSE_CSA_INVALID);
708 * Process HT ie's. This is complicated by our
709 * accepting both the standard ie's and the pre-draft
710 * vendor OUI ie's that some vendors still use/require.
712 if (scan->htcap != NULL) {
713 IEEE80211_VERIFY_LENGTH(scan->htcap[1],
714 scan->htcap[0] == IEEE80211_ELEMID_VENDOR ?
715 4 + sizeof(struct ieee80211_ie_htcap)-2 :
716 sizeof(struct ieee80211_ie_htcap)-2,
719 if (scan->htinfo != NULL) {
720 IEEE80211_VERIFY_LENGTH(scan->htinfo[1],
721 scan->htinfo[0] == IEEE80211_ELEMID_VENDOR ?
722 4 + sizeof(struct ieee80211_ie_htinfo)-2 :
723 sizeof(struct ieee80211_ie_htinfo)-2,
724 scan->htinfo = NULL);
730 * Parse an Action frame. Return 0 on success, non-zero on failure.
733 ieee80211_parse_action(struct ieee80211_node *ni, struct mbuf *m)
735 struct ieee80211vap *vap = ni->ni_vap;
736 const struct ieee80211_action *ia;
737 struct ieee80211_frame *wh;
741 * action frame format:
746 wh = mtod(m, struct ieee80211_frame *);
747 frm = (u_int8_t *)&wh[1];
748 efrm = mtod(m, u_int8_t *) + m->m_len;
749 IEEE80211_VERIFY_LENGTH(efrm - frm,
750 sizeof(struct ieee80211_action), return EINVAL);
751 ia = (const struct ieee80211_action *) frm;
753 vap->iv_stats.is_rx_action++;
754 IEEE80211_NODE_STAT(ni, rx_action);
756 /* verify frame payloads but defer processing */
757 switch (ia->ia_category) {
758 case IEEE80211_ACTION_CAT_BA:
759 switch (ia->ia_action) {
760 case IEEE80211_ACTION_BA_ADDBA_REQUEST:
761 IEEE80211_VERIFY_LENGTH(efrm - frm,
762 sizeof(struct ieee80211_action_ba_addbarequest),
765 case IEEE80211_ACTION_BA_ADDBA_RESPONSE:
766 IEEE80211_VERIFY_LENGTH(efrm - frm,
767 sizeof(struct ieee80211_action_ba_addbaresponse),
770 case IEEE80211_ACTION_BA_DELBA:
771 IEEE80211_VERIFY_LENGTH(efrm - frm,
772 sizeof(struct ieee80211_action_ba_delba),
777 case IEEE80211_ACTION_CAT_HT:
778 switch (ia->ia_action) {
779 case IEEE80211_ACTION_HT_TXCHWIDTH:
780 IEEE80211_VERIFY_LENGTH(efrm - frm,
781 sizeof(struct ieee80211_action_ht_txchwidth),
784 case IEEE80211_ACTION_HT_MIMOPWRSAVE:
785 IEEE80211_VERIFY_LENGTH(efrm - frm,
786 sizeof(struct ieee80211_action_ht_mimopowersave),
791 #ifdef IEEE80211_SUPPORT_MESH
792 case IEEE80211_ACTION_CAT_MESH:
793 switch (ia->ia_action) {
794 case IEEE80211_ACTION_MESH_LMETRIC:
796 * XXX: verification is true only if we are using
797 * Airtime link metric (default)
799 IEEE80211_VERIFY_LENGTH(efrm - frm,
800 sizeof(struct ieee80211_meshlmetric_ie),
803 case IEEE80211_ACTION_MESH_HWMP:
804 /* verify something */
806 case IEEE80211_ACTION_MESH_GANN:
807 IEEE80211_VERIFY_LENGTH(efrm - frm,
808 sizeof(struct ieee80211_meshgann_ie),
811 case IEEE80211_ACTION_MESH_CC:
812 case IEEE80211_ACTION_MESH_MCCA_SREQ:
813 case IEEE80211_ACTION_MESH_MCCA_SREP:
814 case IEEE80211_ACTION_MESH_MCCA_AREQ:
815 case IEEE80211_ACTION_MESH_MCCA_ADVER:
816 case IEEE80211_ACTION_MESH_MCCA_TRDOWN:
817 case IEEE80211_ACTION_MESH_TBTT_REQ:
818 case IEEE80211_ACTION_MESH_TBTT_RES:
819 /* reject these early on, not implemented */
820 IEEE80211_DISCARD(vap,
821 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
822 wh, NULL, "not implemented yet, act=0x%02X",
827 case IEEE80211_ACTION_CAT_SELF_PROT:
828 /* If TA or RA group address discard silently */
829 if (IEEE80211_IS_MULTICAST(wh->i_addr1) ||
830 IEEE80211_IS_MULTICAST(wh->i_addr2))
833 * XXX: Should we verify complete length now or it is
834 * to varying in sizes?
836 switch (ia->ia_action) {
837 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
838 case IEEE80211_ACTION_MESHPEERING_CLOSE:
839 /* is not a peering candidate (yet) */
840 if (ni == vap->iv_bss)
850 #ifdef IEEE80211_DEBUG
855 ieee80211_ssid_mismatch(struct ieee80211vap *vap, const char *tag,
856 uint8_t mac[IEEE80211_ADDR_LEN], uint8_t *ssid)
858 printf("[%s] discard %s frame, ssid mismatch: ",
859 ether_sprintf(mac), tag);
860 ieee80211_print_essid(ssid + 2, ssid[1]);
865 * Return the bssid of a frame.
867 static const uint8_t *
868 ieee80211_getbssid(const struct ieee80211vap *vap,
869 const struct ieee80211_frame *wh)
871 if (vap->iv_opmode == IEEE80211_M_STA)
873 if ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) != IEEE80211_FC1_DIR_NODS)
875 if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL)
880 #include <machine/stdarg.h>
883 ieee80211_note(const struct ieee80211vap *vap, const char *fmt, ...)
885 char buf[128]; /* XXX */
889 vsnprintf(buf, sizeof(buf), fmt, ap);
892 if_printf(vap->iv_ifp, "%s", buf); /* NB: no \n */
896 ieee80211_note_frame(const struct ieee80211vap *vap,
897 const struct ieee80211_frame *wh,
898 const char *fmt, ...)
900 char buf[128]; /* XXX */
904 vsnprintf(buf, sizeof(buf), fmt, ap);
906 if_printf(vap->iv_ifp, "[%s] %s\n",
907 ether_sprintf(ieee80211_getbssid(vap, wh)), buf);
911 ieee80211_note_mac(const struct ieee80211vap *vap,
912 const uint8_t mac[IEEE80211_ADDR_LEN],
913 const char *fmt, ...)
915 char buf[128]; /* XXX */
919 vsnprintf(buf, sizeof(buf), fmt, ap);
921 if_printf(vap->iv_ifp, "[%s] %s\n", ether_sprintf(mac), buf);
925 ieee80211_discard_frame(const struct ieee80211vap *vap,
926 const struct ieee80211_frame *wh,
927 const char *type, const char *fmt, ...)
931 if_printf(vap->iv_ifp, "[%s] discard ",
932 ether_sprintf(ieee80211_getbssid(vap, wh)));
933 printf("%s frame, ", type != NULL ? type :
934 ieee80211_mgt_subtype_name(wh->i_fc[0]));
942 ieee80211_discard_ie(const struct ieee80211vap *vap,
943 const struct ieee80211_frame *wh,
944 const char *type, const char *fmt, ...)
948 if_printf(vap->iv_ifp, "[%s] discard ",
949 ether_sprintf(ieee80211_getbssid(vap, wh)));
951 printf("%s information element, ", type);
953 printf("information element, ");
961 ieee80211_discard_mac(const struct ieee80211vap *vap,
962 const uint8_t mac[IEEE80211_ADDR_LEN],
963 const char *type, const char *fmt, ...)
967 if_printf(vap->iv_ifp, "[%s] discard ", ether_sprintf(mac));
969 printf("%s frame, ", type);
977 #endif /* IEEE80211_DEBUG */