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)
88 struct ieee80211_rx_stats rxs;
90 /* try to read stats from mbuf */
91 bzero(&rxs, sizeof(rxs));
92 if (ieee80211_get_rx_params(m, &rxs) != 0)
95 /* XXX should assert IEEE80211_R_NF and IEEE80211_R_RSSI are set */
96 ieee80211_process_mimo(ni, &rxs);
98 //return ieee80211_input(ni, m, rx->rssi, rx->nf);
99 return ni->ni_vap->iv_input(ni, m, &rxs, rxs.c_rssi, rxs.c_nf);
103 ieee80211_input_all(struct ieee80211com *ic, struct mbuf *m, int rssi, int nf)
105 struct ieee80211_rx_stats rx;
107 rx.r_flags = IEEE80211_R_NF | IEEE80211_R_RSSI;
111 if (!ieee80211_add_rx_params(m, &rx))
114 return ieee80211_input_mimo_all(ic, m);
118 ieee80211_input_mimo_all(struct ieee80211com *ic, struct mbuf *m)
120 struct ieee80211vap *vap;
123 m->m_flags |= M_BCAST; /* NB: mark for bpf tap'ing */
126 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
127 struct ieee80211_node *ni;
130 /* NB: could check for IFF_UP but this is cheaper */
131 if (vap->iv_state == IEEE80211_S_INIT)
134 * WDS vap's only receive directed traffic from the
135 * station at the ``far end''. That traffic should
136 * be passed through the AP vap the station is associated
137 * to--so don't spam them with mcast frames.
139 if (vap->iv_opmode == IEEE80211_M_WDS)
141 if (TAILQ_NEXT(vap, iv_next) != NULL) {
143 * Packet contents are changed by ieee80211_decap
144 * so do a deep copy of the packet.
145 * NB: tags are copied too.
147 mcopy = m_dup(m, M_NOWAIT);
156 ni = ieee80211_ref_node(vap->iv_bss);
157 type = ieee80211_input_mimo(ni, mcopy);
158 ieee80211_free_node(ni);
160 if (m != NULL) /* no vaps, reclaim mbuf */
166 * This function reassembles fragments.
168 * XXX should handle 3 concurrent reassemblies per-spec.
171 ieee80211_defrag(struct ieee80211_node *ni, struct mbuf *m, int hdrspace)
173 struct ieee80211vap *vap = ni->ni_vap;
174 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
175 struct ieee80211_frame *lwh;
178 uint8_t more_frag = wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG;
181 KASSERT(!IEEE80211_IS_MULTICAST(wh->i_addr1), ("multicast fragm?"));
183 rxseq = le16toh(*(uint16_t *)wh->i_seq);
184 fragno = rxseq & IEEE80211_SEQ_FRAG_MASK;
186 /* Quick way out, if there's nothing to defragment */
187 if (!more_frag && fragno == 0 && ni->ni_rxfrag[0] == NULL)
191 * Remove frag to insure it doesn't get reaped by timer.
193 if (ni->ni_table == NULL) {
195 * Should never happen. If the node is orphaned (not in
196 * the table) then input packets should not reach here.
197 * Otherwise, a concurrent request that yanks the table
198 * should be blocked by other interlocking and/or by first
199 * shutting the driver down. Regardless, be defensive
202 /* XXX need msg+stat */
206 IEEE80211_NODE_LOCK(ni->ni_table);
207 mfrag = ni->ni_rxfrag[0];
208 ni->ni_rxfrag[0] = NULL;
209 IEEE80211_NODE_UNLOCK(ni->ni_table);
212 * Validate new fragment is in order and
213 * related to the previous ones.
218 lwh = mtod(mfrag, struct ieee80211_frame *);
219 last_rxseq = le16toh(*(uint16_t *)lwh->i_seq);
220 /* NB: check seq # and frag together */
221 if (rxseq == last_rxseq+1 &&
222 IEEE80211_ADDR_EQ(wh->i_addr1, lwh->i_addr1) &&
223 IEEE80211_ADDR_EQ(wh->i_addr2, lwh->i_addr2)) {
224 /* XXX clear MORE_FRAG bit? */
225 /* track last seqnum and fragno */
226 *(uint16_t *) lwh->i_seq = *(uint16_t *) wh->i_seq;
228 m_adj(m, hdrspace); /* strip header */
229 m_catpkt(mfrag, m); /* concatenate */
232 * Unrelated fragment or no space for it,
233 * clear current fragments.
241 if (fragno != 0) { /* !first fragment, discard */
242 vap->iv_stats.is_rx_defrag++;
243 IEEE80211_NODE_STAT(ni, rx_defrag);
249 if (more_frag) { /* more to come, save */
250 ni->ni_rxfragstamp = ticks;
251 ni->ni_rxfrag[0] = mfrag;
258 ieee80211_deliver_data(struct ieee80211vap *vap,
259 struct ieee80211_node *ni, struct mbuf *m)
261 struct ether_header *eh = mtod(m, struct ether_header *);
262 struct ifnet *ifp = vap->iv_ifp;
264 /* clear driver/net80211 flags before passing up */
265 m->m_flags &= ~(M_MCAST | M_BCAST);
268 /* NB: see hostap_deliver_data, this path doesn't handle hostap */
269 KASSERT(vap->iv_opmode != IEEE80211_M_HOSTAP, ("gack, hostap"));
273 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
274 IEEE80211_NODE_STAT(ni, rx_data);
275 IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len);
276 if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
277 if (ETHER_IS_BROADCAST(eh->ether_dhost))
278 m->m_flags |= M_BCAST;
280 m->m_flags |= M_MCAST;
281 IEEE80211_NODE_STAT(ni, rx_mcast);
283 IEEE80211_NODE_STAT(ni, rx_ucast);
284 m->m_pkthdr.rcvif = ifp;
286 if (ni->ni_vlan != 0) {
287 /* attach vlan tag */
288 m->m_pkthdr.ether_vtag = ni->ni_vlan;
289 m->m_flags |= M_VLANTAG;
291 ifp->if_input(ifp, m);
295 ieee80211_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen)
297 struct ieee80211_qosframe_addr4 wh;
298 struct ether_header *eh;
301 KASSERT(hdrlen <= sizeof(wh),
302 ("hdrlen %d > max %zd", hdrlen, sizeof(wh)));
304 if (m->m_len < hdrlen + sizeof(*llc) &&
305 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
306 vap->iv_stats.is_rx_tooshort++;
310 memcpy(&wh, mtod(m, caddr_t), hdrlen);
311 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
312 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
313 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
314 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
315 /* NB: preserve AppleTalk frames that have a native SNAP hdr */
316 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
317 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
318 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
321 m_adj(m, hdrlen - sizeof(*eh));
323 eh = mtod(m, struct ether_header *);
324 switch (wh.i_fc[1] & IEEE80211_FC1_DIR_MASK) {
325 case IEEE80211_FC1_DIR_NODS:
326 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr1);
327 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr2);
329 case IEEE80211_FC1_DIR_TODS:
330 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr3);
331 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr2);
333 case IEEE80211_FC1_DIR_FROMDS:
334 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr1);
335 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr3);
337 case IEEE80211_FC1_DIR_DSTODS:
338 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr3);
339 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr4);
342 #ifndef __NO_STRICT_ALIGNMENT
343 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
344 m = ieee80211_realign(vap, m, sizeof(*eh));
348 #endif /* !__NO_STRICT_ALIGNMENT */
350 eh = mtod(m, struct ether_header *);
351 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
357 * Decap a frame encapsulated in a fast-frame/A-MSDU.
360 ieee80211_decap1(struct mbuf *m, int *framelen)
362 #define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc))
363 struct ether_header *eh;
367 * The frame has an 802.3 header followed by an 802.2
368 * LLC header. The encapsulated frame length is in the
369 * first header type field; save that and overwrite it
370 * with the true type field found in the second. Then
371 * copy the 802.3 header up to where it belongs and
372 * adjust the mbuf contents to remove the void.
374 if (m->m_len < FF_LLC_SIZE && (m = m_pullup(m, FF_LLC_SIZE)) == NULL)
376 eh = mtod(m, struct ether_header *); /* 802.3 header is first */
377 llc = (struct llc *)&eh[1]; /* 802.2 header follows */
378 *framelen = ntohs(eh->ether_type) /* encap'd frame size */
379 + sizeof(struct ether_header) - sizeof(struct llc);
380 eh->ether_type = llc->llc_un.type_snap.ether_type;
381 ovbcopy(eh, mtod(m, uint8_t *) + sizeof(struct llc),
382 sizeof(struct ether_header));
383 m_adj(m, sizeof(struct llc));
389 * Install received rate set information in the node's state block.
392 ieee80211_setup_rates(struct ieee80211_node *ni,
393 const uint8_t *rates, const uint8_t *xrates, int flags)
395 struct ieee80211vap *vap = ni->ni_vap;
396 struct ieee80211_rateset *rs = &ni->ni_rates;
398 memset(rs, 0, sizeof(*rs));
399 rs->rs_nrates = rates[1];
400 memcpy(rs->rs_rates, rates + 2, rs->rs_nrates);
401 if (xrates != NULL) {
404 * Tack on 11g extended supported rate element.
407 if (rs->rs_nrates + nxrates > IEEE80211_RATE_MAXSIZE) {
408 nxrates = IEEE80211_RATE_MAXSIZE - rs->rs_nrates;
409 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE, ni,
410 "extended rate set too large; only using "
411 "%u of %u rates", nxrates, xrates[1]);
412 vap->iv_stats.is_rx_rstoobig++;
414 memcpy(rs->rs_rates + rs->rs_nrates, xrates+2, nxrates);
415 rs->rs_nrates += nxrates;
417 return ieee80211_fix_rate(ni, rs, flags);
421 * Send a management frame error response to the specified
422 * station. If ni is associated with the station then use
423 * it; otherwise allocate a temporary node suitable for
424 * transmitting the frame and then free the reference so
425 * it will go away as soon as the frame has been transmitted.
428 ieee80211_send_error(struct ieee80211_node *ni,
429 const uint8_t mac[IEEE80211_ADDR_LEN], int subtype, int arg)
431 struct ieee80211vap *vap = ni->ni_vap;
434 if (ni == vap->iv_bss) {
435 if (vap->iv_state != IEEE80211_S_RUN) {
437 * XXX hack until we get rid of this routine.
438 * We can be called prior to the vap reaching
439 * run state under certain conditions in which
440 * case iv_bss->ni_chan will not be setup.
441 * Check for this explicitly and and just ignore
446 ni = ieee80211_tmp_node(vap, mac);
454 IEEE80211_SEND_MGMT(ni, subtype, arg);
456 ieee80211_free_node(ni);
460 ieee80211_alloc_challenge(struct ieee80211_node *ni)
462 if (ni->ni_challenge == NULL)
463 ni->ni_challenge = (uint32_t *)
464 IEEE80211_MALLOC(IEEE80211_CHALLENGE_LEN,
465 M_80211_NODE, IEEE80211_M_NOWAIT);
466 if (ni->ni_challenge == NULL) {
467 IEEE80211_NOTE(ni->ni_vap,
468 IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni,
469 "%s", "shared key challenge alloc failed");
472 return (ni->ni_challenge != NULL);
476 * Parse a Beacon or ProbeResponse frame and return the
477 * useful information in an ieee80211_scanparams structure.
478 * Status is set to 0 if no problems were found; otherwise
479 * a bitmask of IEEE80211_BPARSE_* items is returned that
480 * describes the problems detected.
483 ieee80211_parse_beacon(struct ieee80211_node *ni, struct mbuf *m,
484 struct ieee80211_channel *rxchan, struct ieee80211_scanparams *scan)
486 struct ieee80211vap *vap = ni->ni_vap;
487 struct ieee80211com *ic = ni->ni_ic;
488 struct ieee80211_frame *wh;
491 wh = mtod(m, struct ieee80211_frame *);
492 frm = (uint8_t *)&wh[1];
493 efrm = mtod(m, uint8_t *) + m->m_len;
496 * beacon/probe response frame format
498 * XXX Update from 802.11-2012 - eg where HT is
500 * [2] beacon interval
501 * [2] capability information
503 * [tlv] supported rates
504 * [tlv] country information
505 * [tlv] channel switch announcement (CSA)
506 * [tlv] parameter set (FH/DS)
507 * [tlv] erp information
508 * [tlv] extended supported rates
511 * [tlv] HT capabilities
512 * [tlv] HT information
513 * [tlv] VHT capabilities
514 * [tlv] VHT information
515 * [tlv] Atheros capabilities
517 * [tlv] Mesh Configuration
519 IEEE80211_VERIFY_LENGTH(efrm - frm, 12,
520 return (scan->status = IEEE80211_BPARSE_BADIELEN));
521 memset(scan, 0, sizeof(*scan));
522 scan->tstamp = frm; frm += 8;
523 scan->bintval = le16toh(*(uint16_t *)frm); frm += 2;
524 scan->capinfo = le16toh(*(uint16_t *)frm); frm += 2;
525 scan->bchan = ieee80211_chan2ieee(ic, rxchan);
526 scan->chan = scan->bchan;
528 scan->ies_len = efrm - frm;
530 while (efrm - frm > 1) {
531 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2,
532 return (scan->status = IEEE80211_BPARSE_BADIELEN));
534 case IEEE80211_ELEMID_SSID:
537 case IEEE80211_ELEMID_RATES:
540 case IEEE80211_ELEMID_COUNTRY:
543 case IEEE80211_ELEMID_CSA:
546 case IEEE80211_ELEMID_QUIET:
549 case IEEE80211_ELEMID_FHPARMS:
550 if (ic->ic_phytype == IEEE80211_T_FH) {
551 scan->fhdwell = le16dec(&frm[2]);
552 scan->chan = IEEE80211_FH_CHAN(frm[4], frm[5]);
553 scan->fhindex = frm[6];
556 case IEEE80211_ELEMID_DSPARMS:
558 * XXX hack this since depending on phytype
559 * is problematic for multi-mode devices.
561 if (ic->ic_phytype != IEEE80211_T_FH)
564 case IEEE80211_ELEMID_TIM:
567 scan->timoff = frm - mtod(m, uint8_t *);
569 case IEEE80211_ELEMID_IBSSPARMS:
570 case IEEE80211_ELEMID_CFPARMS:
571 case IEEE80211_ELEMID_PWRCNSTR:
572 case IEEE80211_ELEMID_BSSLOAD:
573 case IEEE80211_ELEMID_APCHANREP:
574 /* NB: avoid debugging complaints */
576 case IEEE80211_ELEMID_XRATES:
579 case IEEE80211_ELEMID_ERP:
581 IEEE80211_DISCARD_IE(vap,
582 IEEE80211_MSG_ELEMID, wh, "ERP",
583 "bad len %u", frm[1]);
584 vap->iv_stats.is_rx_elem_toobig++;
587 scan->erp = frm[2] | 0x100;
589 case IEEE80211_ELEMID_HTCAP:
592 case IEEE80211_ELEMID_VHT_CAP:
595 case IEEE80211_ELEMID_VHT_OPMODE:
596 scan->vhtopmode = frm;
598 case IEEE80211_ELEMID_RSN:
601 case IEEE80211_ELEMID_HTINFO:
604 #ifdef IEEE80211_SUPPORT_MESH
605 case IEEE80211_ELEMID_MESHID:
608 case IEEE80211_ELEMID_MESHCONF:
609 scan->meshconf = frm;
612 /* Extended capabilities; nothing handles it for now */
613 case IEEE80211_ELEMID_EXTCAP:
615 case IEEE80211_ELEMID_VENDOR:
618 else if (iswmeparam(frm) || iswmeinfo(frm))
620 #ifdef IEEE80211_SUPPORT_SUPERG
621 else if (isatherosoui(frm))
624 #ifdef IEEE80211_SUPPORT_TDMA
625 else if (istdmaoui(frm))
628 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) {
630 * Accept pre-draft HT ie's if the
631 * standard ones have not been seen.
633 if (ishtcapoui(frm)) {
634 if (scan->htcap == NULL)
636 } else if (ishtinfooui(frm)) {
637 if (scan->htinfo == NULL)
643 IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID,
645 "id %u, len %u", *frm, frm[1]);
646 vap->iv_stats.is_rx_elem_unknown++;
651 IEEE80211_VERIFY_ELEMENT(scan->rates, IEEE80211_RATE_MAXSIZE,
652 scan->status |= IEEE80211_BPARSE_RATES_INVALID);
653 if (scan->rates != NULL && scan->xrates != NULL) {
655 * NB: don't process XRATES if RATES is missing. This
656 * avoids a potential null ptr deref and should be ok
657 * as the return code will already note RATES is missing
658 * (so callers shouldn't otherwise process the frame).
660 IEEE80211_VERIFY_ELEMENT(scan->xrates,
661 IEEE80211_RATE_MAXSIZE - scan->rates[1],
662 scan->status |= IEEE80211_BPARSE_XRATES_INVALID);
664 IEEE80211_VERIFY_ELEMENT(scan->ssid, IEEE80211_NWID_LEN,
665 scan->status |= IEEE80211_BPARSE_SSID_INVALID);
666 if (scan->chan != scan->bchan && ic->ic_phytype != IEEE80211_T_FH) {
668 * Frame was received on a channel different from the
669 * one indicated in the DS params element id;
670 * silently discard it.
672 * NB: this can happen due to signal leakage.
673 * But we should take it for FH phy because
674 * the rssi value should be correct even for
675 * different hop pattern in FH.
677 IEEE80211_DISCARD(vap,
678 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
679 wh, NULL, "for off-channel %u (bchan=%u)",
680 scan->chan, scan->bchan);
681 vap->iv_stats.is_rx_chanmismatch++;
682 scan->status |= IEEE80211_BPARSE_OFFCHAN;
684 if (!(IEEE80211_BINTVAL_MIN <= scan->bintval &&
685 scan->bintval <= IEEE80211_BINTVAL_MAX)) {
686 IEEE80211_DISCARD(vap,
687 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
688 wh, NULL, "bogus beacon interval (%d TU)",
689 (int) scan->bintval);
690 vap->iv_stats.is_rx_badbintval++;
691 scan->status |= IEEE80211_BPARSE_BINTVAL_INVALID;
693 if (scan->country != NULL) {
695 * Validate we have at least enough data to extract
696 * the country code. Not sure if we should return an
697 * error instead of discarding the IE; consider this
698 * being lenient as we don't depend on the data for
701 IEEE80211_VERIFY_LENGTH(scan->country[1], 3 * sizeof(uint8_t),
702 scan->country = NULL);
704 if (scan->csa != NULL) {
706 * Validate Channel Switch Announcement; this must
707 * be the correct length or we toss the frame.
709 IEEE80211_VERIFY_LENGTH(scan->csa[1], 3 * sizeof(uint8_t),
710 scan->status |= IEEE80211_BPARSE_CSA_INVALID);
713 * Process HT ie's. This is complicated by our
714 * accepting both the standard ie's and the pre-draft
715 * vendor OUI ie's that some vendors still use/require.
717 if (scan->htcap != NULL) {
718 IEEE80211_VERIFY_LENGTH(scan->htcap[1],
719 scan->htcap[0] == IEEE80211_ELEMID_VENDOR ?
720 4 + sizeof(struct ieee80211_ie_htcap)-2 :
721 sizeof(struct ieee80211_ie_htcap)-2,
724 if (scan->htinfo != NULL) {
725 IEEE80211_VERIFY_LENGTH(scan->htinfo[1],
726 scan->htinfo[0] == IEEE80211_ELEMID_VENDOR ?
727 4 + sizeof(struct ieee80211_ie_htinfo)-2 :
728 sizeof(struct ieee80211_ie_htinfo)-2,
729 scan->htinfo = NULL);
732 /* Process VHT IEs */
733 if (scan->vhtcap != NULL) {
734 IEEE80211_VERIFY_LENGTH(scan->vhtcap[1],
735 sizeof(struct ieee80211_ie_vhtcap) - 2,
736 scan->vhtcap = NULL);
738 if (scan->vhtopmode != NULL) {
739 IEEE80211_VERIFY_LENGTH(scan->vhtopmode[1],
740 sizeof(struct ieee80211_ie_vht_operation) - 2,
741 scan->vhtopmode = NULL);
748 * Parse an Action frame. Return 0 on success, non-zero on failure.
751 ieee80211_parse_action(struct ieee80211_node *ni, struct mbuf *m)
753 struct ieee80211vap *vap = ni->ni_vap;
754 const struct ieee80211_action *ia;
755 struct ieee80211_frame *wh;
759 * action frame format:
764 wh = mtod(m, struct ieee80211_frame *);
765 frm = (u_int8_t *)&wh[1];
766 efrm = mtod(m, u_int8_t *) + m->m_len;
767 IEEE80211_VERIFY_LENGTH(efrm - frm,
768 sizeof(struct ieee80211_action), return EINVAL);
769 ia = (const struct ieee80211_action *) frm;
771 vap->iv_stats.is_rx_action++;
772 IEEE80211_NODE_STAT(ni, rx_action);
774 /* verify frame payloads but defer processing */
775 switch (ia->ia_category) {
776 case IEEE80211_ACTION_CAT_BA:
777 switch (ia->ia_action) {
778 case IEEE80211_ACTION_BA_ADDBA_REQUEST:
779 IEEE80211_VERIFY_LENGTH(efrm - frm,
780 sizeof(struct ieee80211_action_ba_addbarequest),
783 case IEEE80211_ACTION_BA_ADDBA_RESPONSE:
784 IEEE80211_VERIFY_LENGTH(efrm - frm,
785 sizeof(struct ieee80211_action_ba_addbaresponse),
788 case IEEE80211_ACTION_BA_DELBA:
789 IEEE80211_VERIFY_LENGTH(efrm - frm,
790 sizeof(struct ieee80211_action_ba_delba),
795 case IEEE80211_ACTION_CAT_HT:
796 switch (ia->ia_action) {
797 case IEEE80211_ACTION_HT_TXCHWIDTH:
798 IEEE80211_VERIFY_LENGTH(efrm - frm,
799 sizeof(struct ieee80211_action_ht_txchwidth),
802 case IEEE80211_ACTION_HT_MIMOPWRSAVE:
803 IEEE80211_VERIFY_LENGTH(efrm - frm,
804 sizeof(struct ieee80211_action_ht_mimopowersave),
809 #ifdef IEEE80211_SUPPORT_MESH
810 case IEEE80211_ACTION_CAT_MESH:
811 switch (ia->ia_action) {
812 case IEEE80211_ACTION_MESH_LMETRIC:
814 * XXX: verification is true only if we are using
815 * Airtime link metric (default)
817 IEEE80211_VERIFY_LENGTH(efrm - frm,
818 sizeof(struct ieee80211_meshlmetric_ie),
821 case IEEE80211_ACTION_MESH_HWMP:
822 /* verify something */
824 case IEEE80211_ACTION_MESH_GANN:
825 IEEE80211_VERIFY_LENGTH(efrm - frm,
826 sizeof(struct ieee80211_meshgann_ie),
829 case IEEE80211_ACTION_MESH_CC:
830 case IEEE80211_ACTION_MESH_MCCA_SREQ:
831 case IEEE80211_ACTION_MESH_MCCA_SREP:
832 case IEEE80211_ACTION_MESH_MCCA_AREQ:
833 case IEEE80211_ACTION_MESH_MCCA_ADVER:
834 case IEEE80211_ACTION_MESH_MCCA_TRDOWN:
835 case IEEE80211_ACTION_MESH_TBTT_REQ:
836 case IEEE80211_ACTION_MESH_TBTT_RES:
837 /* reject these early on, not implemented */
838 IEEE80211_DISCARD(vap,
839 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
840 wh, NULL, "not implemented yet, act=0x%02X",
845 case IEEE80211_ACTION_CAT_SELF_PROT:
846 /* If TA or RA group address discard silently */
847 if (IEEE80211_IS_MULTICAST(wh->i_addr1) ||
848 IEEE80211_IS_MULTICAST(wh->i_addr2))
851 * XXX: Should we verify complete length now or it is
852 * to varying in sizes?
854 switch (ia->ia_action) {
855 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
856 case IEEE80211_ACTION_MESHPEERING_CLOSE:
857 /* is not a peering candidate (yet) */
858 if (ni == vap->iv_bss)
864 case IEEE80211_ACTION_CAT_VHT:
865 printf("%s: TODO: VHT handling!\n", __func__);
871 #ifdef IEEE80211_DEBUG
876 ieee80211_ssid_mismatch(struct ieee80211vap *vap, const char *tag,
877 uint8_t mac[IEEE80211_ADDR_LEN], uint8_t *ssid)
879 printf("[%s] discard %s frame, ssid mismatch: ",
880 ether_sprintf(mac), tag);
881 ieee80211_print_essid(ssid + 2, ssid[1]);
886 * Return the bssid of a frame.
888 static const uint8_t *
889 ieee80211_getbssid(const struct ieee80211vap *vap,
890 const struct ieee80211_frame *wh)
892 if (vap->iv_opmode == IEEE80211_M_STA)
894 if ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) != IEEE80211_FC1_DIR_NODS)
896 if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL)
901 #include <machine/stdarg.h>
904 ieee80211_note(const struct ieee80211vap *vap, const char *fmt, ...)
906 char buf[128]; /* XXX */
910 vsnprintf(buf, sizeof(buf), fmt, ap);
913 if_printf(vap->iv_ifp, "%s", buf); /* NB: no \n */
917 ieee80211_note_frame(const struct ieee80211vap *vap,
918 const struct ieee80211_frame *wh,
919 const char *fmt, ...)
921 char buf[128]; /* XXX */
925 vsnprintf(buf, sizeof(buf), fmt, ap);
927 if_printf(vap->iv_ifp, "[%s] %s\n",
928 ether_sprintf(ieee80211_getbssid(vap, wh)), buf);
932 ieee80211_note_mac(const struct ieee80211vap *vap,
933 const uint8_t mac[IEEE80211_ADDR_LEN],
934 const char *fmt, ...)
936 char buf[128]; /* XXX */
940 vsnprintf(buf, sizeof(buf), fmt, ap);
942 if_printf(vap->iv_ifp, "[%s] %s\n", ether_sprintf(mac), buf);
946 ieee80211_discard_frame(const struct ieee80211vap *vap,
947 const struct ieee80211_frame *wh,
948 const char *type, const char *fmt, ...)
952 if_printf(vap->iv_ifp, "[%s] discard ",
953 ether_sprintf(ieee80211_getbssid(vap, wh)));
954 printf("%s frame, ", type != NULL ? type :
955 ieee80211_mgt_subtype_name(wh->i_fc[0]));
963 ieee80211_discard_ie(const struct ieee80211vap *vap,
964 const struct ieee80211_frame *wh,
965 const char *type, const char *fmt, ...)
969 if_printf(vap->iv_ifp, "[%s] discard ",
970 ether_sprintf(ieee80211_getbssid(vap, wh)));
972 printf("%s information element, ", type);
974 printf("information element, ");
982 ieee80211_discard_mac(const struct ieee80211vap *vap,
983 const uint8_t mac[IEEE80211_ADDR_LEN],
984 const char *type, const char *fmt, ...)
988 if_printf(vap->iv_ifp, "[%s] discard ", ether_sprintf(mac));
990 printf("%s frame, ", type);
998 #endif /* IEEE80211_DEBUG */