2 * Copyright (c) 2001 Atsushi Onoe
3 * Copyright (c) 2002-2008 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_llc.h>
44 #include <net/if_media.h>
45 #include <net/if_vlan_var.h>
47 #include <net80211/ieee80211_var.h>
48 #include <net80211/ieee80211_input.h>
53 #include <netinet/in.h>
54 #include <net/ethernet.h>
58 ieee80211_input_all(struct ieee80211com *ic,
59 struct mbuf *m, int rssi, int noise, u_int32_t rstamp)
61 struct ieee80211vap *vap;
65 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
66 struct ieee80211_node *ni;
70 * WDS vap's only receive directed traffic from the
71 * station at the ``far end''. That traffic should
72 * be passed through the AP vap the station is associated
73 * to--so don't spam them with mcast frames.
75 if (vap->iv_opmode == IEEE80211_M_WDS)
77 if (TAILQ_NEXT(vap, iv_next) != NULL) {
79 * Packet contents are changed by ieee80211_decap
80 * so do a deep copy of the packet.
82 mcopy = m_dup(m, M_DONTWAIT);
91 ni = ieee80211_ref_node(vap->iv_bss);
92 type = ieee80211_input(ni, mcopy, rssi, noise, rstamp);
93 ieee80211_free_node(ni);
95 if (m != NULL) /* no vaps, reclaim mbuf */
101 * This function reassemble fragments.
103 * XXX should handle 3 concurrent reassemblies per-spec.
106 ieee80211_defrag(struct ieee80211_node *ni, struct mbuf *m, int hdrspace)
108 struct ieee80211vap *vap = ni->ni_vap;
109 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
110 struct ieee80211_frame *lwh;
113 uint8_t more_frag = wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG;
116 KASSERT(!IEEE80211_IS_MULTICAST(wh->i_addr1), ("multicast fragm?"));
118 rxseq = le16toh(*(uint16_t *)wh->i_seq);
119 fragno = rxseq & IEEE80211_SEQ_FRAG_MASK;
121 /* Quick way out, if there's nothing to defragment */
122 if (!more_frag && fragno == 0 && ni->ni_rxfrag[0] == NULL)
126 * Remove frag to insure it doesn't get reaped by timer.
128 if (ni->ni_table == NULL) {
130 * Should never happen. If the node is orphaned (not in
131 * the table) then input packets should not reach here.
132 * Otherwise, a concurrent request that yanks the table
133 * should be blocked by other interlocking and/or by first
134 * shutting the driver down. Regardless, be defensive
137 /* XXX need msg+stat */
141 IEEE80211_NODE_LOCK(ni->ni_table);
142 mfrag = ni->ni_rxfrag[0];
143 ni->ni_rxfrag[0] = NULL;
144 IEEE80211_NODE_UNLOCK(ni->ni_table);
147 * Validate new fragment is in order and
148 * related to the previous ones.
153 lwh = mtod(mfrag, struct ieee80211_frame *);
154 last_rxseq = le16toh(*(uint16_t *)lwh->i_seq);
155 /* NB: check seq # and frag together */
156 if (rxseq != last_rxseq+1 ||
157 !IEEE80211_ADDR_EQ(wh->i_addr1, lwh->i_addr1) ||
158 !IEEE80211_ADDR_EQ(wh->i_addr2, lwh->i_addr2)) {
160 * Unrelated fragment or no space for it,
161 * clear current fragments.
169 if (fragno != 0) { /* !first fragment, discard */
170 vap->iv_stats.is_rx_defrag++;
171 IEEE80211_NODE_STAT(ni, rx_defrag);
176 } else { /* concatenate */
177 m_adj(m, hdrspace); /* strip header */
179 /* NB: m_cat doesn't update the packet header */
180 mfrag->m_pkthdr.len += m->m_pkthdr.len;
181 /* track last seqnum and fragno */
182 lwh = mtod(mfrag, struct ieee80211_frame *);
183 *(uint16_t *) lwh->i_seq = *(uint16_t *) wh->i_seq;
185 if (more_frag) { /* more to come, save */
186 ni->ni_rxfragstamp = ticks;
187 ni->ni_rxfrag[0] = mfrag;
194 ieee80211_deliver_data(struct ieee80211vap *vap,
195 struct ieee80211_node *ni, struct mbuf *m)
197 struct ether_header *eh = mtod(m, struct ether_header *);
198 struct ifnet *ifp = vap->iv_ifp;
200 /* NB: see hostap_deliver_data, this path doesn't handle hostap */
201 KASSERT(vap->iv_opmode != IEEE80211_M_HOSTAP, ("gack, hostap"));
206 IEEE80211_NODE_STAT(ni, rx_data);
207 IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len);
208 if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
209 m->m_flags |= M_MCAST; /* XXX M_BCAST? */
210 IEEE80211_NODE_STAT(ni, rx_mcast);
212 IEEE80211_NODE_STAT(ni, rx_ucast);
213 m->m_pkthdr.rcvif = ifp;
215 /* clear driver/net80211 flags before passing up */
216 m->m_flags &= ~M_80211_RX;
218 if (ni->ni_vlan != 0) {
219 /* attach vlan tag */
220 m->m_pkthdr.ether_vtag = ni->ni_vlan;
221 m->m_flags |= M_VLANTAG;
223 ifp->if_input(ifp, m);
227 ieee80211_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen)
229 struct ieee80211_qosframe_addr4 wh; /* Max size address frames */
230 struct ether_header *eh;
233 if (m->m_len < hdrlen + sizeof(*llc) &&
234 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
238 memcpy(&wh, mtod(m, caddr_t), hdrlen);
239 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
240 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
241 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
242 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0) {
243 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
246 m_adj(m, hdrlen - sizeof(*eh));
248 eh = mtod(m, struct ether_header *);
249 switch (wh.i_fc[1] & IEEE80211_FC1_DIR_MASK) {
250 case IEEE80211_FC1_DIR_NODS:
251 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr1);
252 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr2);
254 case IEEE80211_FC1_DIR_TODS:
255 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr3);
256 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr2);
258 case IEEE80211_FC1_DIR_FROMDS:
259 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr1);
260 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr3);
262 case IEEE80211_FC1_DIR_DSTODS:
263 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr3);
264 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr4);
267 #ifdef ALIGNED_POINTER
268 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
269 struct mbuf *n, *n0, **np;
276 pktlen = m->m_pkthdr.len;
277 while (pktlen > off) {
279 MGETHDR(n, M_DONTWAIT, MT_DATA);
287 MGET(n, M_DONTWAIT, MT_DATA);
295 if (pktlen - off >= MINCLSIZE) {
296 MCLGET(n, M_DONTWAIT);
297 if (n->m_flags & M_EXT)
298 n->m_len = n->m_ext.ext_size;
302 (caddr_t)ALIGN(n->m_data + sizeof(*eh)) -
304 n->m_len -= newdata - n->m_data;
307 if (n->m_len > pktlen - off)
308 n->m_len = pktlen - off;
309 m_copydata(m, off, n->m_len, mtod(n, caddr_t));
317 #endif /* ALIGNED_POINTER */
319 eh = mtod(m, struct ether_header *);
320 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
326 * Decap a frame encapsulated in a fast-frame/A-MSDU.
329 ieee80211_decap1(struct mbuf *m, int *framelen)
331 #define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc))
332 struct ether_header *eh;
336 * The frame has an 802.3 header followed by an 802.2
337 * LLC header. The encapsulated frame length is in the
338 * first header type field; save that and overwrite it
339 * with the true type field found in the second. Then
340 * copy the 802.3 header up to where it belongs and
341 * adjust the mbuf contents to remove the void.
343 if (m->m_len < FF_LLC_SIZE && (m = m_pullup(m, FF_LLC_SIZE)) == NULL)
345 eh = mtod(m, struct ether_header *); /* 802.3 header is first */
346 llc = (struct llc *)&eh[1]; /* 802.2 header follows */
347 *framelen = ntohs(eh->ether_type) /* encap'd frame size */
348 + sizeof(struct ether_header) - sizeof(struct llc);
349 eh->ether_type = llc->llc_un.type_snap.ether_type;
350 ovbcopy(eh, mtod(m, uint8_t *) + sizeof(struct llc),
351 sizeof(struct ether_header));
352 m_adj(m, sizeof(struct llc));
358 * Decap the encapsulated frame pair and dispatch the first
359 * for delivery. The second frame is returned for delivery
360 * via the normal path.
363 ieee80211_decap_fastframe(struct ieee80211_node *ni, struct mbuf *m)
365 #define MS(x,f) (((x) & f) >> f##_S)
366 struct ieee80211vap *vap = ni->ni_vap;
371 m_copydata(m, 0, sizeof(uint32_t), (caddr_t) &ath);
372 if (MS(ath, ATH_FF_PROTO) != ATH_FF_PROTO_L2TUNNEL) {
373 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
374 ni->ni_macaddr, "fast-frame",
375 "unsupport tunnel protocol, header 0x%x", ath);
376 vap->iv_stats.is_ff_badhdr++;
380 /* NB: skip header and alignment padding */
381 m_adj(m, roundup(sizeof(uint32_t) - 2, 4) + 2);
383 vap->iv_stats.is_ff_decap++;
386 * Decap the first frame, bust it apart from the
387 * second and deliver; then decap the second frame
388 * and return it to the caller for normal delivery.
390 m = ieee80211_decap1(m, &framelen);
392 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
393 ni->ni_macaddr, "fast-frame", "%s", "first decap failed");
394 vap->iv_stats.is_ff_tooshort++;
397 n = m_split(m, framelen, M_NOWAIT);
399 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
400 ni->ni_macaddr, "fast-frame",
401 "%s", "unable to split encapsulated frames");
402 vap->iv_stats.is_ff_split++;
403 m_freem(m); /* NB: must reclaim */
406 /* XXX not right for WDS */
407 vap->iv_deliver_data(vap, ni, m); /* 1st of pair */
410 * Decap second frame.
412 m_adj(n, roundup2(framelen, 4) - framelen); /* padding */
413 n = ieee80211_decap1(n, &framelen);
415 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
416 ni->ni_macaddr, "fast-frame", "%s", "second decap failed");
417 vap->iv_stats.is_ff_tooshort++;
419 /* XXX verify framelen against mbuf contents */
420 return n; /* 2nd delivered by caller */
425 * Install received rate set information in the node's state block.
428 ieee80211_setup_rates(struct ieee80211_node *ni,
429 const uint8_t *rates, const uint8_t *xrates, int flags)
431 struct ieee80211vap *vap = ni->ni_vap;
432 struct ieee80211_rateset *rs = &ni->ni_rates;
434 memset(rs, 0, sizeof(*rs));
435 rs->rs_nrates = rates[1];
436 memcpy(rs->rs_rates, rates + 2, rs->rs_nrates);
437 if (xrates != NULL) {
440 * Tack on 11g extended supported rate element.
443 if (rs->rs_nrates + nxrates > IEEE80211_RATE_MAXSIZE) {
444 nxrates = IEEE80211_RATE_MAXSIZE - rs->rs_nrates;
445 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE, ni,
446 "extended rate set too large; only using "
447 "%u of %u rates", nxrates, xrates[1]);
448 vap->iv_stats.is_rx_rstoobig++;
450 memcpy(rs->rs_rates + rs->rs_nrates, xrates+2, nxrates);
451 rs->rs_nrates += nxrates;
453 return ieee80211_fix_rate(ni, rs, flags);
457 * Send a management frame error response to the specified
458 * station. If ni is associated with the station then use
459 * it; otherwise allocate a temporary node suitable for
460 * transmitting the frame and then free the reference so
461 * it will go away as soon as the frame has been transmitted.
464 ieee80211_send_error(struct ieee80211_node *ni,
465 const uint8_t mac[IEEE80211_ADDR_LEN], int subtype, int arg)
467 struct ieee80211vap *vap = ni->ni_vap;
470 if (ni == vap->iv_bss) {
471 if (vap->iv_state != IEEE80211_S_RUN) {
473 * XXX hack until we get rid of this routine.
474 * We can be called prior to the vap reaching
475 * run state under certain conditions in which
476 * case iv_bss->ni_chan will not be setup.
477 * Check for this explicitly and and just ignore
482 ni = ieee80211_tmp_node(vap, mac);
490 IEEE80211_SEND_MGMT(ni, subtype, arg);
492 ieee80211_free_node(ni);
496 ieee80211_alloc_challenge(struct ieee80211_node *ni)
498 if (ni->ni_challenge == NULL)
499 MALLOC(ni->ni_challenge, uint32_t*, IEEE80211_CHALLENGE_LEN,
500 M_80211_NODE, M_NOWAIT);
501 if (ni->ni_challenge == NULL) {
502 IEEE80211_NOTE(ni->ni_vap,
503 IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni,
504 "%s", "shared key challenge alloc failed");
507 return (ni->ni_challenge != NULL);
511 ieee80211_parse_ath(struct ieee80211_node *ni, uint8_t *ie)
513 const struct ieee80211_ath_ie *ath =
514 (const struct ieee80211_ath_ie *) ie;
516 ni->ni_ath_flags = ath->ath_capability;
517 ni->ni_ath_defkeyix = LE_READ_2(&ath->ath_defkeyix);
521 * Parse a Beacon or ProbeResponse frame and return the
522 * useful information in an ieee80211_scanparams structure.
523 * Status is set to 0 if no problems were found; otherwise
524 * a bitmask of IEEE80211_BPARSE_* items is returned that
525 * describes the problems detected.
528 ieee80211_parse_beacon(struct ieee80211_node *ni, struct mbuf *m,
529 struct ieee80211_scanparams *scan)
531 struct ieee80211vap *vap = ni->ni_vap;
532 struct ieee80211com *ic = ni->ni_ic;
533 struct ieee80211_frame *wh;
536 wh = mtod(m, struct ieee80211_frame *);
537 frm = (uint8_t *)&wh[1];
538 efrm = mtod(m, uint8_t *) + m->m_len;
541 * beacon/probe response frame format
543 * [2] beacon interval
544 * [2] capability information
546 * [tlv] supported rates
547 * [tlv] country information
548 * [tlv] parameter set (FH/DS)
549 * [tlv] erp information
550 * [tlv] extended supported rates
553 * [tlv] HT capabilities
554 * [tlv] HT information
555 * [tlv] Atheros capabilities
557 IEEE80211_VERIFY_LENGTH(efrm - frm, 12,
558 return (scan->status = IEEE80211_BPARSE_BADIELEN));
559 memset(scan, 0, sizeof(*scan));
560 scan->tstamp = frm; frm += 8;
561 scan->bintval = le16toh(*(uint16_t *)frm); frm += 2;
562 scan->capinfo = le16toh(*(uint16_t *)frm); frm += 2;
563 scan->bchan = ieee80211_chan2ieee(ic, ic->ic_curchan);
564 scan->chan = scan->bchan;
566 scan->ies_len = efrm - frm;
568 while (efrm - frm > 1) {
569 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2,
570 return (scan->status = IEEE80211_BPARSE_BADIELEN));
572 case IEEE80211_ELEMID_SSID:
575 case IEEE80211_ELEMID_RATES:
578 case IEEE80211_ELEMID_COUNTRY:
581 case IEEE80211_ELEMID_FHPARMS:
582 if (ic->ic_phytype == IEEE80211_T_FH) {
583 scan->fhdwell = LE_READ_2(&frm[2]);
584 scan->chan = IEEE80211_FH_CHAN(frm[4], frm[5]);
585 scan->fhindex = frm[6];
588 case IEEE80211_ELEMID_DSPARMS:
590 * XXX hack this since depending on phytype
591 * is problematic for multi-mode devices.
593 if (ic->ic_phytype != IEEE80211_T_FH)
596 case IEEE80211_ELEMID_TIM:
599 scan->timoff = frm - mtod(m, uint8_t *);
601 case IEEE80211_ELEMID_IBSSPARMS:
602 case IEEE80211_ELEMID_CFPARMS:
603 /* NB: avoid debugging complaints */
605 case IEEE80211_ELEMID_XRATES:
608 case IEEE80211_ELEMID_ERP:
610 IEEE80211_DISCARD_IE(vap,
611 IEEE80211_MSG_ELEMID, wh, "ERP",
612 "bad len %u", frm[1]);
613 vap->iv_stats.is_rx_elem_toobig++;
616 scan->erp = frm[2] | 0x100;
618 case IEEE80211_ELEMID_HTCAP:
621 case IEEE80211_ELEMID_RSN:
624 case IEEE80211_ELEMID_HTINFO:
627 case IEEE80211_ELEMID_VENDOR:
630 else if (iswmeparam(frm) || iswmeinfo(frm))
632 else if (isatherosoui(frm))
634 else if (vap->iv_flags_ext & IEEE80211_FEXT_HTCOMPAT) {
636 * Accept pre-draft HT ie's if the
637 * standard ones have not been seen.
639 if (ishtcapoui(frm)) {
640 if (scan->htcap == NULL)
642 } else if (ishtinfooui(frm)) {
643 if (scan->htinfo == NULL)
649 IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID,
651 "id %u, len %u", *frm, frm[1]);
652 vap->iv_stats.is_rx_elem_unknown++;
657 IEEE80211_VERIFY_ELEMENT(scan->rates, IEEE80211_RATE_MAXSIZE,
658 scan->status |= IEEE80211_BPARSE_RATES_INVALID);
659 if (scan->rates != NULL && scan->xrates != NULL) {
661 * NB: don't process XRATES if RATES is missing. This
662 * avoids a potential null ptr deref and should be ok
663 * as the return code will already note RATES is missing
664 * (so callers shouldn't otherwise process the frame).
666 IEEE80211_VERIFY_ELEMENT(scan->xrates,
667 IEEE80211_RATE_MAXSIZE - scan->rates[1],
668 scan->status |= IEEE80211_BPARSE_XRATES_INVALID);
670 IEEE80211_VERIFY_ELEMENT(scan->ssid, IEEE80211_NWID_LEN,
671 scan->status |= IEEE80211_BPARSE_SSID_INVALID);
672 #if IEEE80211_CHAN_MAX < 255
673 if (scan->chan > IEEE80211_CHAN_MAX) {
674 IEEE80211_DISCARD(vap, IEEE80211_MSG_ELEMID,
675 wh, NULL, "invalid channel %u", scan->chan);
676 vap->iv_stats.is_rx_badchan++;
677 scan->status |= IEEE80211_BPARSE_CHAN_INVALID;
680 if (scan->chan != scan->bchan && ic->ic_phytype != IEEE80211_T_FH) {
682 * Frame was received on a channel different from the
683 * one indicated in the DS params element id;
684 * silently discard it.
686 * NB: this can happen due to signal leakage.
687 * But we should take it for FH phy because
688 * the rssi value should be correct even for
689 * different hop pattern in FH.
691 IEEE80211_DISCARD(vap,
692 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
693 wh, NULL, "for off-channel %u", scan->chan);
694 vap->iv_stats.is_rx_chanmismatch++;
695 scan->status |= IEEE80211_BPARSE_OFFCHAN;
697 if (!(IEEE80211_BINTVAL_MIN <= scan->bintval &&
698 scan->bintval <= IEEE80211_BINTVAL_MAX)) {
699 IEEE80211_DISCARD(vap,
700 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
701 wh, NULL, "bogus beacon interval", scan->bintval);
702 vap->iv_stats.is_rx_badbintval++;
703 scan->status |= IEEE80211_BPARSE_BINTVAL_INVALID;
705 if (scan->country != NULL) {
707 * Validate we have at least enough data to extract
708 * the country code. Not sure if we should return an
709 * error instead of discarding the IE; consider this
710 * being lenient as we don't depend on the data for
713 IEEE80211_VERIFY_LENGTH(scan->country[1], 3 * sizeof(uint8_t),
714 scan->country = NULL);
717 * Process HT ie's. This is complicated by our
718 * accepting both the standard ie's and the pre-draft
719 * vendor OUI ie's that some vendors still use/require.
721 if (scan->htcap != NULL) {
722 IEEE80211_VERIFY_LENGTH(scan->htcap[1],
723 scan->htcap[0] == IEEE80211_ELEMID_VENDOR ?
724 4 + sizeof(struct ieee80211_ie_htcap)-2 :
725 sizeof(struct ieee80211_ie_htcap)-2,
728 if (scan->htinfo != NULL) {
729 IEEE80211_VERIFY_LENGTH(scan->htinfo[1],
730 scan->htinfo[0] == IEEE80211_ELEMID_VENDOR ?
731 4 + sizeof(struct ieee80211_ie_htinfo)-2 :
732 sizeof(struct ieee80211_ie_htinfo)-2,
733 scan->htinfo = NULL);
739 * Parse an Action frame. Return 0 on success, non-zero on failure.
742 ieee80211_parse_action(struct ieee80211_node *ni, struct mbuf *m)
744 struct ieee80211vap *vap = ni->ni_vap;
745 const struct ieee80211_action *ia;
746 struct ieee80211_frame *wh;
750 * action frame format:
755 wh = mtod(m, struct ieee80211_frame *);
756 frm = (u_int8_t *)&wh[1];
757 efrm = mtod(m, u_int8_t *) + m->m_len;
758 IEEE80211_VERIFY_LENGTH(efrm - frm,
759 sizeof(struct ieee80211_action), return EINVAL);
760 ia = (const struct ieee80211_action *) frm;
762 vap->iv_stats.is_rx_action++;
763 IEEE80211_NODE_STAT(ni, rx_action);
765 /* verify frame payloads but defer processing */
766 /* XXX maybe push this to method */
767 switch (ia->ia_category) {
768 case IEEE80211_ACTION_CAT_BA:
769 switch (ia->ia_action) {
770 case IEEE80211_ACTION_BA_ADDBA_REQUEST:
771 IEEE80211_VERIFY_LENGTH(efrm - frm,
772 sizeof(struct ieee80211_action_ba_addbarequest),
775 case IEEE80211_ACTION_BA_ADDBA_RESPONSE:
776 IEEE80211_VERIFY_LENGTH(efrm - frm,
777 sizeof(struct ieee80211_action_ba_addbaresponse),
780 case IEEE80211_ACTION_BA_DELBA:
781 IEEE80211_VERIFY_LENGTH(efrm - frm,
782 sizeof(struct ieee80211_action_ba_delba),
787 case IEEE80211_ACTION_CAT_HT:
788 switch (ia->ia_action) {
789 case IEEE80211_ACTION_HT_TXCHWIDTH:
790 IEEE80211_VERIFY_LENGTH(efrm - frm,
791 sizeof(struct ieee80211_action_ht_txchwidth),
794 case IEEE80211_ACTION_HT_MIMOPWRSAVE:
795 IEEE80211_VERIFY_LENGTH(efrm - frm,
796 sizeof(struct ieee80211_action_ht_mimopowersave),
805 #ifdef IEEE80211_DEBUG
810 ieee80211_ssid_mismatch(struct ieee80211vap *vap, const char *tag,
811 uint8_t mac[IEEE80211_ADDR_LEN], uint8_t *ssid)
813 printf("[%s] discard %s frame, ssid mismatch: ",
814 ether_sprintf(mac), tag);
815 ieee80211_print_essid(ssid + 2, ssid[1]);
820 * Return the bssid of a frame.
822 static const uint8_t *
823 ieee80211_getbssid(struct ieee80211vap *vap, const struct ieee80211_frame *wh)
825 if (vap->iv_opmode == IEEE80211_M_STA)
827 if ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) != IEEE80211_FC1_DIR_NODS)
829 if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL)
834 #include <machine/stdarg.h>
837 ieee80211_note(struct ieee80211vap *vap, const char *fmt, ...)
839 char buf[128]; /* XXX */
843 vsnprintf(buf, sizeof(buf), fmt, ap);
846 if_printf(vap->iv_ifp, "%s", buf); /* NB: no \n */
850 ieee80211_note_frame(struct ieee80211vap *vap,
851 const struct ieee80211_frame *wh,
852 const char *fmt, ...)
854 char buf[128]; /* XXX */
858 vsnprintf(buf, sizeof(buf), fmt, ap);
860 if_printf(vap->iv_ifp, "[%s] %s\n",
861 ether_sprintf(ieee80211_getbssid(vap, wh)), buf);
865 ieee80211_note_mac(struct ieee80211vap *vap,
866 const uint8_t mac[IEEE80211_ADDR_LEN],
867 const char *fmt, ...)
869 char buf[128]; /* XXX */
873 vsnprintf(buf, sizeof(buf), fmt, ap);
875 if_printf(vap->iv_ifp, "[%s] %s\n", ether_sprintf(mac), buf);
879 ieee80211_discard_frame(struct ieee80211vap *vap,
880 const struct ieee80211_frame *wh,
881 const char *type, const char *fmt, ...)
885 if_printf(vap->iv_ifp, "[%s] discard ",
886 ether_sprintf(ieee80211_getbssid(vap, wh)));
888 printf("%s frame, ", ieee80211_mgt_subtype_name[
889 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) >>
890 IEEE80211_FC0_SUBTYPE_SHIFT]);
892 printf("%s frame, ", type);
900 ieee80211_discard_ie(struct ieee80211vap *vap,
901 const struct ieee80211_frame *wh,
902 const char *type, const char *fmt, ...)
906 if_printf(vap->iv_ifp, "[%s] discard ",
907 ether_sprintf(ieee80211_getbssid(vap, wh)));
909 printf("%s information element, ", type);
911 printf("information element, ");
919 ieee80211_discard_mac(struct ieee80211vap *vap,
920 const uint8_t mac[IEEE80211_ADDR_LEN],
921 const char *type, const char *fmt, ...)
925 if_printf(vap->iv_ifp, "[%s] discard ", ether_sprintf(mac));
927 printf("%s frame, ", type);
935 #endif /* IEEE80211_DEBUG */