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 /* XXX should assert IEEE80211_R_NF and IEEE80211_R_RSSI are set */
90 ieee80211_process_mimo(ni, rx);
91 return ieee80211_input(ni, m, rx->rssi, rx->nf);
95 ieee80211_input_all(struct ieee80211com *ic, struct mbuf *m, int rssi, int nf)
97 struct ieee80211_rx_stats rx;
99 rx.r_flags = IEEE80211_R_NF | IEEE80211_R_RSSI;
102 return ieee80211_input_mimo_all(ic, m, &rx);
106 ieee80211_input_mimo_all(struct ieee80211com *ic, struct mbuf *m,
107 struct ieee80211_rx_stats *rx)
109 struct ieee80211vap *vap;
112 m->m_flags |= M_BCAST; /* NB: mark for bpf tap'ing */
115 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
116 struct ieee80211_node *ni;
119 /* NB: could check for IFF_UP but this is cheaper */
120 if (vap->iv_state == IEEE80211_S_INIT)
123 * WDS vap's only receive directed traffic from the
124 * station at the ``far end''. That traffic should
125 * be passed through the AP vap the station is associated
126 * to--so don't spam them with mcast frames.
128 if (vap->iv_opmode == IEEE80211_M_WDS)
130 if (TAILQ_NEXT(vap, iv_next) != NULL) {
132 * Packet contents are changed by ieee80211_decap
133 * so do a deep copy of the packet.
135 mcopy = m_dup(m, M_NOWAIT);
144 ni = ieee80211_ref_node(vap->iv_bss);
145 type = ieee80211_input_mimo(ni, mcopy, rx);
146 ieee80211_free_node(ni);
148 if (m != NULL) /* no vaps, reclaim mbuf */
154 * This function reassembles fragments.
156 * XXX should handle 3 concurrent reassemblies per-spec.
159 ieee80211_defrag(struct ieee80211_node *ni, struct mbuf *m, int hdrspace)
161 struct ieee80211vap *vap = ni->ni_vap;
162 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
163 struct ieee80211_frame *lwh;
166 uint8_t more_frag = wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG;
169 KASSERT(!IEEE80211_IS_MULTICAST(wh->i_addr1), ("multicast fragm?"));
171 rxseq = le16toh(*(uint16_t *)wh->i_seq);
172 fragno = rxseq & IEEE80211_SEQ_FRAG_MASK;
174 /* Quick way out, if there's nothing to defragment */
175 if (!more_frag && fragno == 0 && ni->ni_rxfrag[0] == NULL)
179 * Remove frag to insure it doesn't get reaped by timer.
181 if (ni->ni_table == NULL) {
183 * Should never happen. If the node is orphaned (not in
184 * the table) then input packets should not reach here.
185 * Otherwise, a concurrent request that yanks the table
186 * should be blocked by other interlocking and/or by first
187 * shutting the driver down. Regardless, be defensive
190 /* XXX need msg+stat */
194 IEEE80211_NODE_LOCK(ni->ni_table);
195 mfrag = ni->ni_rxfrag[0];
196 ni->ni_rxfrag[0] = NULL;
197 IEEE80211_NODE_UNLOCK(ni->ni_table);
200 * Validate new fragment is in order and
201 * related to the previous ones.
206 lwh = mtod(mfrag, struct ieee80211_frame *);
207 last_rxseq = le16toh(*(uint16_t *)lwh->i_seq);
208 /* NB: check seq # and frag together */
209 if (rxseq != last_rxseq+1 ||
210 !IEEE80211_ADDR_EQ(wh->i_addr1, lwh->i_addr1) ||
211 !IEEE80211_ADDR_EQ(wh->i_addr2, lwh->i_addr2)) {
213 * Unrelated fragment or no space for it,
214 * clear current fragments.
222 if (fragno != 0) { /* !first fragment, discard */
223 vap->iv_stats.is_rx_defrag++;
224 IEEE80211_NODE_STAT(ni, rx_defrag);
229 } else { /* concatenate */
230 m_adj(m, hdrspace); /* strip header */
232 /* NB: m_cat doesn't update the packet header */
233 mfrag->m_pkthdr.len += m->m_pkthdr.len;
234 /* track last seqnum and fragno */
235 lwh = mtod(mfrag, struct ieee80211_frame *);
236 *(uint16_t *) lwh->i_seq = *(uint16_t *) wh->i_seq;
238 if (more_frag) { /* more to come, save */
239 ni->ni_rxfragstamp = ticks;
240 ni->ni_rxfrag[0] = mfrag;
247 ieee80211_deliver_data(struct ieee80211vap *vap,
248 struct ieee80211_node *ni, struct mbuf *m)
250 struct ether_header *eh = mtod(m, struct ether_header *);
251 struct ifnet *ifp = vap->iv_ifp;
253 /* clear driver/net80211 flags before passing up */
254 m->m_flags &= ~(M_MCAST | M_BCAST);
255 #if __FreeBSD_version >= 1000046
259 /* NB: see hostap_deliver_data, this path doesn't handle hostap */
260 KASSERT(vap->iv_opmode != IEEE80211_M_HOSTAP, ("gack, hostap"));
265 IEEE80211_NODE_STAT(ni, rx_data);
266 IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len);
267 if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
268 m->m_flags |= M_MCAST; /* XXX M_BCAST? */
269 IEEE80211_NODE_STAT(ni, rx_mcast);
271 IEEE80211_NODE_STAT(ni, rx_ucast);
272 m->m_pkthdr.rcvif = ifp;
274 if (ni->ni_vlan != 0) {
275 /* attach vlan tag */
276 m->m_pkthdr.ether_vtag = ni->ni_vlan;
277 m->m_flags |= M_VLANTAG;
279 ifp->if_input(ifp, m);
283 ieee80211_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen)
285 struct ieee80211_qosframe_addr4 wh;
286 struct ether_header *eh;
289 KASSERT(hdrlen <= sizeof(wh),
290 ("hdrlen %d > max %zd", hdrlen, sizeof(wh)));
292 if (m->m_len < hdrlen + sizeof(*llc) &&
293 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
294 vap->iv_stats.is_rx_tooshort++;
298 memcpy(&wh, mtod(m, caddr_t), hdrlen);
299 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
300 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
301 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
302 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
303 /* NB: preserve AppleTalk frames that have a native SNAP hdr */
304 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
305 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
306 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
309 m_adj(m, hdrlen - sizeof(*eh));
311 eh = mtod(m, struct ether_header *);
312 switch (wh.i_fc[1] & IEEE80211_FC1_DIR_MASK) {
313 case IEEE80211_FC1_DIR_NODS:
314 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr1);
315 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr2);
317 case IEEE80211_FC1_DIR_TODS:
318 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr3);
319 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr2);
321 case IEEE80211_FC1_DIR_FROMDS:
322 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr1);
323 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr3);
325 case IEEE80211_FC1_DIR_DSTODS:
326 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr3);
327 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr4);
330 #ifndef __NO_STRICT_ALIGNMENT
331 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
332 m = ieee80211_realign(vap, m, sizeof(*eh));
336 #endif /* !__NO_STRICT_ALIGNMENT */
338 eh = mtod(m, struct ether_header *);
339 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
345 * Decap a frame encapsulated in a fast-frame/A-MSDU.
348 ieee80211_decap1(struct mbuf *m, int *framelen)
350 #define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc))
351 struct ether_header *eh;
355 * The frame has an 802.3 header followed by an 802.2
356 * LLC header. The encapsulated frame length is in the
357 * first header type field; save that and overwrite it
358 * with the true type field found in the second. Then
359 * copy the 802.3 header up to where it belongs and
360 * adjust the mbuf contents to remove the void.
362 if (m->m_len < FF_LLC_SIZE && (m = m_pullup(m, FF_LLC_SIZE)) == NULL)
364 eh = mtod(m, struct ether_header *); /* 802.3 header is first */
365 llc = (struct llc *)&eh[1]; /* 802.2 header follows */
366 *framelen = ntohs(eh->ether_type) /* encap'd frame size */
367 + sizeof(struct ether_header) - sizeof(struct llc);
368 eh->ether_type = llc->llc_un.type_snap.ether_type;
369 ovbcopy(eh, mtod(m, uint8_t *) + sizeof(struct llc),
370 sizeof(struct ether_header));
371 m_adj(m, sizeof(struct llc));
377 * Install received rate set information in the node's state block.
380 ieee80211_setup_rates(struct ieee80211_node *ni,
381 const uint8_t *rates, const uint8_t *xrates, int flags)
383 struct ieee80211vap *vap = ni->ni_vap;
384 struct ieee80211_rateset *rs = &ni->ni_rates;
386 memset(rs, 0, sizeof(*rs));
387 rs->rs_nrates = rates[1];
388 memcpy(rs->rs_rates, rates + 2, rs->rs_nrates);
389 if (xrates != NULL) {
392 * Tack on 11g extended supported rate element.
395 if (rs->rs_nrates + nxrates > IEEE80211_RATE_MAXSIZE) {
396 nxrates = IEEE80211_RATE_MAXSIZE - rs->rs_nrates;
397 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE, ni,
398 "extended rate set too large; only using "
399 "%u of %u rates", nxrates, xrates[1]);
400 vap->iv_stats.is_rx_rstoobig++;
402 memcpy(rs->rs_rates + rs->rs_nrates, xrates+2, nxrates);
403 rs->rs_nrates += nxrates;
405 return ieee80211_fix_rate(ni, rs, flags);
409 * Send a management frame error response to the specified
410 * station. If ni is associated with the station then use
411 * it; otherwise allocate a temporary node suitable for
412 * transmitting the frame and then free the reference so
413 * it will go away as soon as the frame has been transmitted.
416 ieee80211_send_error(struct ieee80211_node *ni,
417 const uint8_t mac[IEEE80211_ADDR_LEN], int subtype, int arg)
419 struct ieee80211vap *vap = ni->ni_vap;
422 if (ni == vap->iv_bss) {
423 if (vap->iv_state != IEEE80211_S_RUN) {
425 * XXX hack until we get rid of this routine.
426 * We can be called prior to the vap reaching
427 * run state under certain conditions in which
428 * case iv_bss->ni_chan will not be setup.
429 * Check for this explicitly and and just ignore
434 ni = ieee80211_tmp_node(vap, mac);
442 IEEE80211_SEND_MGMT(ni, subtype, arg);
444 ieee80211_free_node(ni);
448 ieee80211_alloc_challenge(struct ieee80211_node *ni)
450 if (ni->ni_challenge == NULL)
451 ni->ni_challenge = (uint32_t *) malloc(IEEE80211_CHALLENGE_LEN,
452 M_80211_NODE, M_NOWAIT);
453 if (ni->ni_challenge == NULL) {
454 IEEE80211_NOTE(ni->ni_vap,
455 IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni,
456 "%s", "shared key challenge alloc failed");
459 return (ni->ni_challenge != NULL);
463 * Parse a Beacon or ProbeResponse frame and return the
464 * useful information in an ieee80211_scanparams structure.
465 * Status is set to 0 if no problems were found; otherwise
466 * a bitmask of IEEE80211_BPARSE_* items is returned that
467 * describes the problems detected.
470 ieee80211_parse_beacon(struct ieee80211_node *ni, struct mbuf *m,
471 struct ieee80211_scanparams *scan)
473 struct ieee80211vap *vap = ni->ni_vap;
474 struct ieee80211com *ic = ni->ni_ic;
475 struct ieee80211_frame *wh;
478 wh = mtod(m, struct ieee80211_frame *);
479 frm = (uint8_t *)&wh[1];
480 efrm = mtod(m, uint8_t *) + m->m_len;
483 * beacon/probe response frame format
485 * [2] beacon interval
486 * [2] capability information
488 * [tlv] supported rates
489 * [tlv] country information
490 * [tlv] channel switch announcement (CSA)
491 * [tlv] parameter set (FH/DS)
492 * [tlv] erp information
493 * [tlv] extended supported rates
496 * [tlv] HT capabilities
497 * [tlv] HT information
498 * [tlv] Atheros capabilities
500 * [tlv] Mesh Configuration
502 IEEE80211_VERIFY_LENGTH(efrm - frm, 12,
503 return (scan->status = IEEE80211_BPARSE_BADIELEN));
504 memset(scan, 0, sizeof(*scan));
505 scan->tstamp = frm; frm += 8;
506 scan->bintval = le16toh(*(uint16_t *)frm); frm += 2;
507 scan->capinfo = le16toh(*(uint16_t *)frm); frm += 2;
508 scan->bchan = ieee80211_chan2ieee(ic, ic->ic_curchan);
509 scan->chan = scan->bchan;
511 scan->ies_len = efrm - frm;
513 while (efrm - frm > 1) {
514 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2,
515 return (scan->status = IEEE80211_BPARSE_BADIELEN));
517 case IEEE80211_ELEMID_SSID:
520 case IEEE80211_ELEMID_RATES:
523 case IEEE80211_ELEMID_COUNTRY:
526 case IEEE80211_ELEMID_CSA:
529 case IEEE80211_ELEMID_QUIET:
532 case IEEE80211_ELEMID_FHPARMS:
533 if (ic->ic_phytype == IEEE80211_T_FH) {
534 scan->fhdwell = LE_READ_2(&frm[2]);
535 scan->chan = IEEE80211_FH_CHAN(frm[4], frm[5]);
536 scan->fhindex = frm[6];
539 case IEEE80211_ELEMID_DSPARMS:
541 * XXX hack this since depending on phytype
542 * is problematic for multi-mode devices.
544 if (ic->ic_phytype != IEEE80211_T_FH)
547 case IEEE80211_ELEMID_TIM:
550 scan->timoff = frm - mtod(m, uint8_t *);
552 case IEEE80211_ELEMID_IBSSPARMS:
553 case IEEE80211_ELEMID_CFPARMS:
554 case IEEE80211_ELEMID_PWRCNSTR:
555 /* NB: avoid debugging complaints */
557 case IEEE80211_ELEMID_XRATES:
560 case IEEE80211_ELEMID_ERP:
562 IEEE80211_DISCARD_IE(vap,
563 IEEE80211_MSG_ELEMID, wh, "ERP",
564 "bad len %u", frm[1]);
565 vap->iv_stats.is_rx_elem_toobig++;
568 scan->erp = frm[2] | 0x100;
570 case IEEE80211_ELEMID_HTCAP:
573 case IEEE80211_ELEMID_RSN:
576 case IEEE80211_ELEMID_HTINFO:
579 #ifdef IEEE80211_SUPPORT_MESH
580 case IEEE80211_ELEMID_MESHID:
583 case IEEE80211_ELEMID_MESHCONF:
584 scan->meshconf = frm;
587 case IEEE80211_ELEMID_VENDOR:
590 else if (iswmeparam(frm) || iswmeinfo(frm))
592 #ifdef IEEE80211_SUPPORT_SUPERG
593 else if (isatherosoui(frm))
596 #ifdef IEEE80211_SUPPORT_TDMA
597 else if (istdmaoui(frm))
600 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) {
602 * Accept pre-draft HT ie's if the
603 * standard ones have not been seen.
605 if (ishtcapoui(frm)) {
606 if (scan->htcap == NULL)
608 } else if (ishtinfooui(frm)) {
609 if (scan->htinfo == NULL)
615 IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID,
617 "id %u, len %u", *frm, frm[1]);
618 vap->iv_stats.is_rx_elem_unknown++;
623 IEEE80211_VERIFY_ELEMENT(scan->rates, IEEE80211_RATE_MAXSIZE,
624 scan->status |= IEEE80211_BPARSE_RATES_INVALID);
625 if (scan->rates != NULL && scan->xrates != NULL) {
627 * NB: don't process XRATES if RATES is missing. This
628 * avoids a potential null ptr deref and should be ok
629 * as the return code will already note RATES is missing
630 * (so callers shouldn't otherwise process the frame).
632 IEEE80211_VERIFY_ELEMENT(scan->xrates,
633 IEEE80211_RATE_MAXSIZE - scan->rates[1],
634 scan->status |= IEEE80211_BPARSE_XRATES_INVALID);
636 IEEE80211_VERIFY_ELEMENT(scan->ssid, IEEE80211_NWID_LEN,
637 scan->status |= IEEE80211_BPARSE_SSID_INVALID);
638 if (scan->chan != scan->bchan && ic->ic_phytype != IEEE80211_T_FH) {
640 * Frame was received on a channel different from the
641 * one indicated in the DS params element id;
642 * silently discard it.
644 * NB: this can happen due to signal leakage.
645 * But we should take it for FH phy because
646 * the rssi value should be correct even for
647 * different hop pattern in FH.
649 IEEE80211_DISCARD(vap,
650 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
651 wh, NULL, "for off-channel %u", scan->chan);
652 vap->iv_stats.is_rx_chanmismatch++;
653 scan->status |= IEEE80211_BPARSE_OFFCHAN;
655 if (!(IEEE80211_BINTVAL_MIN <= scan->bintval &&
656 scan->bintval <= IEEE80211_BINTVAL_MAX)) {
657 IEEE80211_DISCARD(vap,
658 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
659 wh, NULL, "bogus beacon interval (%d TU)",
660 (int) scan->bintval);
661 vap->iv_stats.is_rx_badbintval++;
662 scan->status |= IEEE80211_BPARSE_BINTVAL_INVALID;
664 if (scan->country != NULL) {
666 * Validate we have at least enough data to extract
667 * the country code. Not sure if we should return an
668 * error instead of discarding the IE; consider this
669 * being lenient as we don't depend on the data for
672 IEEE80211_VERIFY_LENGTH(scan->country[1], 3 * sizeof(uint8_t),
673 scan->country = NULL);
675 if (scan->csa != NULL) {
677 * Validate Channel Switch Announcement; this must
678 * be the correct length or we toss the frame.
680 IEEE80211_VERIFY_LENGTH(scan->csa[1], 3 * sizeof(uint8_t),
681 scan->status |= IEEE80211_BPARSE_CSA_INVALID);
684 * Process HT ie's. This is complicated by our
685 * accepting both the standard ie's and the pre-draft
686 * vendor OUI ie's that some vendors still use/require.
688 if (scan->htcap != NULL) {
689 IEEE80211_VERIFY_LENGTH(scan->htcap[1],
690 scan->htcap[0] == IEEE80211_ELEMID_VENDOR ?
691 4 + sizeof(struct ieee80211_ie_htcap)-2 :
692 sizeof(struct ieee80211_ie_htcap)-2,
695 if (scan->htinfo != NULL) {
696 IEEE80211_VERIFY_LENGTH(scan->htinfo[1],
697 scan->htinfo[0] == IEEE80211_ELEMID_VENDOR ?
698 4 + sizeof(struct ieee80211_ie_htinfo)-2 :
699 sizeof(struct ieee80211_ie_htinfo)-2,
700 scan->htinfo = NULL);
706 * Parse an Action frame. Return 0 on success, non-zero on failure.
709 ieee80211_parse_action(struct ieee80211_node *ni, struct mbuf *m)
711 struct ieee80211vap *vap = ni->ni_vap;
712 const struct ieee80211_action *ia;
713 struct ieee80211_frame *wh;
717 * action frame format:
722 wh = mtod(m, struct ieee80211_frame *);
723 frm = (u_int8_t *)&wh[1];
724 efrm = mtod(m, u_int8_t *) + m->m_len;
725 IEEE80211_VERIFY_LENGTH(efrm - frm,
726 sizeof(struct ieee80211_action), return EINVAL);
727 ia = (const struct ieee80211_action *) frm;
729 vap->iv_stats.is_rx_action++;
730 IEEE80211_NODE_STAT(ni, rx_action);
732 /* verify frame payloads but defer processing */
733 switch (ia->ia_category) {
734 case IEEE80211_ACTION_CAT_BA:
735 switch (ia->ia_action) {
736 case IEEE80211_ACTION_BA_ADDBA_REQUEST:
737 IEEE80211_VERIFY_LENGTH(efrm - frm,
738 sizeof(struct ieee80211_action_ba_addbarequest),
741 case IEEE80211_ACTION_BA_ADDBA_RESPONSE:
742 IEEE80211_VERIFY_LENGTH(efrm - frm,
743 sizeof(struct ieee80211_action_ba_addbaresponse),
746 case IEEE80211_ACTION_BA_DELBA:
747 IEEE80211_VERIFY_LENGTH(efrm - frm,
748 sizeof(struct ieee80211_action_ba_delba),
753 case IEEE80211_ACTION_CAT_HT:
754 switch (ia->ia_action) {
755 case IEEE80211_ACTION_HT_TXCHWIDTH:
756 IEEE80211_VERIFY_LENGTH(efrm - frm,
757 sizeof(struct ieee80211_action_ht_txchwidth),
760 case IEEE80211_ACTION_HT_MIMOPWRSAVE:
761 IEEE80211_VERIFY_LENGTH(efrm - frm,
762 sizeof(struct ieee80211_action_ht_mimopowersave),
767 #ifdef IEEE80211_SUPPORT_MESH
768 case IEEE80211_ACTION_CAT_MESH:
769 switch (ia->ia_action) {
770 case IEEE80211_ACTION_MESH_LMETRIC:
772 * XXX: verification is true only if we are using
773 * Airtime link metric (default)
775 IEEE80211_VERIFY_LENGTH(efrm - frm,
776 sizeof(struct ieee80211_meshlmetric_ie),
779 case IEEE80211_ACTION_MESH_HWMP:
780 /* verify something */
782 case IEEE80211_ACTION_MESH_GANN:
783 IEEE80211_VERIFY_LENGTH(efrm - frm,
784 sizeof(struct ieee80211_meshgann_ie),
787 case IEEE80211_ACTION_MESH_CC:
788 case IEEE80211_ACTION_MESH_MCCA_SREQ:
789 case IEEE80211_ACTION_MESH_MCCA_SREP:
790 case IEEE80211_ACTION_MESH_MCCA_AREQ:
791 case IEEE80211_ACTION_MESH_MCCA_ADVER:
792 case IEEE80211_ACTION_MESH_MCCA_TRDOWN:
793 case IEEE80211_ACTION_MESH_TBTT_REQ:
794 case IEEE80211_ACTION_MESH_TBTT_RES:
795 /* reject these early on, not implemented */
796 IEEE80211_DISCARD(vap,
797 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
798 wh, NULL, "not implemented yet, act=0x%02X",
803 case IEEE80211_ACTION_CAT_SELF_PROT:
804 /* If TA or RA group address discard silently */
805 if (IEEE80211_IS_MULTICAST(wh->i_addr1) ||
806 IEEE80211_IS_MULTICAST(wh->i_addr2))
809 * XXX: Should we verify complete length now or it is
810 * to varying in sizes?
812 switch (ia->ia_action) {
813 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
814 case IEEE80211_ACTION_MESHPEERING_CLOSE:
815 /* is not a peering candidate (yet) */
816 if (ni == vap->iv_bss)
826 #ifdef IEEE80211_DEBUG
831 ieee80211_ssid_mismatch(struct ieee80211vap *vap, const char *tag,
832 uint8_t mac[IEEE80211_ADDR_LEN], uint8_t *ssid)
834 printf("[%s] discard %s frame, ssid mismatch: ",
835 ether_sprintf(mac), tag);
836 ieee80211_print_essid(ssid + 2, ssid[1]);
841 * Return the bssid of a frame.
843 static const uint8_t *
844 ieee80211_getbssid(const struct ieee80211vap *vap,
845 const struct ieee80211_frame *wh)
847 if (vap->iv_opmode == IEEE80211_M_STA)
849 if ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) != IEEE80211_FC1_DIR_NODS)
851 if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL)
856 #include <machine/stdarg.h>
859 ieee80211_note(const struct ieee80211vap *vap, const char *fmt, ...)
861 char buf[128]; /* XXX */
865 vsnprintf(buf, sizeof(buf), fmt, ap);
868 if_printf(vap->iv_ifp, "%s", buf); /* NB: no \n */
872 ieee80211_note_frame(const struct ieee80211vap *vap,
873 const struct ieee80211_frame *wh,
874 const char *fmt, ...)
876 char buf[128]; /* XXX */
880 vsnprintf(buf, sizeof(buf), fmt, ap);
882 if_printf(vap->iv_ifp, "[%s] %s\n",
883 ether_sprintf(ieee80211_getbssid(vap, wh)), buf);
887 ieee80211_note_mac(const struct ieee80211vap *vap,
888 const uint8_t mac[IEEE80211_ADDR_LEN],
889 const char *fmt, ...)
891 char buf[128]; /* XXX */
895 vsnprintf(buf, sizeof(buf), fmt, ap);
897 if_printf(vap->iv_ifp, "[%s] %s\n", ether_sprintf(mac), buf);
901 ieee80211_discard_frame(const struct ieee80211vap *vap,
902 const struct ieee80211_frame *wh,
903 const char *type, const char *fmt, ...)
907 if_printf(vap->iv_ifp, "[%s] discard ",
908 ether_sprintf(ieee80211_getbssid(vap, wh)));
910 printf("%s frame, ", ieee80211_mgt_subtype_name[
911 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) >>
912 IEEE80211_FC0_SUBTYPE_SHIFT]);
914 printf("%s frame, ", type);
922 ieee80211_discard_ie(const struct ieee80211vap *vap,
923 const struct ieee80211_frame *wh,
924 const char *type, const char *fmt, ...)
928 if_printf(vap->iv_ifp, "[%s] discard ",
929 ether_sprintf(ieee80211_getbssid(vap, wh)));
931 printf("%s information element, ", type);
933 printf("information element, ");
941 ieee80211_discard_mac(const struct ieee80211vap *vap,
942 const uint8_t mac[IEEE80211_ADDR_LEN],
943 const char *type, const char *fmt, ...)
947 if_printf(vap->iv_ifp, "[%s] discard ", ether_sprintf(mac));
949 printf("%s frame, ", type);
957 #endif /* IEEE80211_DEBUG */