2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2001 Atsushi Onoe
5 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
34 #include <sys/param.h>
35 #include <sys/systm.h>
37 #include <sys/malloc.h>
38 #include <sys/endian.h>
39 #include <sys/kernel.h>
41 #include <sys/socket.h>
43 #include <net/ethernet.h>
45 #include <net/if_var.h>
46 #include <net/if_llc.h>
47 #include <net/if_media.h>
48 #include <net/if_vlan_var.h>
50 #include <net80211/ieee80211_var.h>
51 #include <net80211/ieee80211_input.h>
52 #ifdef IEEE80211_SUPPORT_MESH
53 #include <net80211/ieee80211_mesh.h>
59 #include <netinet/in.h>
60 #include <net/ethernet.h>
64 ieee80211_process_mimo(struct ieee80211_node *ni, struct ieee80211_rx_stats *rx)
68 /* Verify the required MIMO bits are set */
69 if ((rx->r_flags & (IEEE80211_R_C_CHAIN | IEEE80211_R_C_NF | IEEE80211_R_C_RSSI)) !=
70 (IEEE80211_R_C_CHAIN | IEEE80211_R_C_NF | IEEE80211_R_C_RSSI))
73 /* XXX This assumes the MIMO radios have both ctl and ext chains */
74 for (i = 0; i < MIN(rx->c_chain, IEEE80211_MAX_CHAINS); i++) {
75 IEEE80211_RSSI_LPF(ni->ni_mimo_rssi_ctl[i], rx->c_rssi_ctl[i]);
76 IEEE80211_RSSI_LPF(ni->ni_mimo_rssi_ext[i], rx->c_rssi_ext[i]);
79 /* XXX This also assumes the MIMO radios have both ctl and ext chains */
80 for(i = 0; i < MIN(rx->c_chain, IEEE80211_MAX_CHAINS); i++) {
81 ni->ni_mimo_noise_ctl[i] = rx->c_nf_ctl[i];
82 ni->ni_mimo_noise_ext[i] = rx->c_nf_ext[i];
84 ni->ni_mimo_chains = rx->c_chain;
88 ieee80211_input_mimo(struct ieee80211_node *ni, struct mbuf *m)
90 struct ieee80211_rx_stats rxs;
92 /* try to read stats from mbuf */
93 bzero(&rxs, sizeof(rxs));
94 if (ieee80211_get_rx_params(m, &rxs) != 0)
97 /* XXX should assert IEEE80211_R_NF and IEEE80211_R_RSSI are set */
98 ieee80211_process_mimo(ni, &rxs);
100 //return ieee80211_input(ni, m, rx->rssi, rx->nf);
101 return ni->ni_vap->iv_input(ni, m, &rxs, rxs.c_rssi, rxs.c_nf);
105 ieee80211_input_all(struct ieee80211com *ic, struct mbuf *m, int rssi, int nf)
107 struct ieee80211_rx_stats rx;
109 rx.r_flags = IEEE80211_R_NF | IEEE80211_R_RSSI;
113 if (!ieee80211_add_rx_params(m, &rx))
116 return ieee80211_input_mimo_all(ic, m);
120 ieee80211_input_mimo_all(struct ieee80211com *ic, struct mbuf *m)
122 struct ieee80211vap *vap;
125 m->m_flags |= M_BCAST; /* NB: mark for bpf tap'ing */
128 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
129 struct ieee80211_node *ni;
132 /* NB: could check for IFF_UP but this is cheaper */
133 if (vap->iv_state == IEEE80211_S_INIT)
136 * WDS vap's only receive directed traffic from the
137 * station at the ``far end''. That traffic should
138 * be passed through the AP vap the station is associated
139 * to--so don't spam them with mcast frames.
141 if (vap->iv_opmode == IEEE80211_M_WDS)
143 if (TAILQ_NEXT(vap, iv_next) != NULL) {
145 * Packet contents are changed by ieee80211_decap
146 * so do a deep copy of the packet.
147 * NB: tags are copied too.
149 mcopy = m_dup(m, IEEE80211_M_NOWAIT);
158 ni = ieee80211_ref_node(vap->iv_bss);
159 type = ieee80211_input_mimo(ni, mcopy);
160 ieee80211_free_node(ni);
162 if (m != NULL) /* no vaps, reclaim mbuf */
168 * This function reassembles fragments.
170 * XXX should handle 3 concurrent reassemblies per-spec.
173 ieee80211_defrag(struct ieee80211_node *ni, struct mbuf *m, int hdrspace,
176 struct ieee80211vap *vap = ni->ni_vap;
177 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
178 struct ieee80211_frame *lwh;
181 uint8_t more_frag = wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG;
184 KASSERT(!IEEE80211_IS_MULTICAST(wh->i_addr1), ("multicast fragm?"));
186 rxseq = le16toh(*(uint16_t *)wh->i_seq);
187 fragno = rxseq & IEEE80211_SEQ_FRAG_MASK;
189 /* Quick way out, if there's nothing to defragment */
190 if (!more_frag && fragno == 0 && ni->ni_rxfrag[0] == NULL)
193 /* Temporarily set flag to remember if fragment was encrypted. */
194 /* XXX use a non-packet altering storage for this in the future. */
196 wh->i_fc[1] |= IEEE80211_FC1_PROTECTED;
199 * Remove frag to insure it doesn't get reaped by timer.
201 if (ni->ni_table == NULL) {
203 * Should never happen. If the node is orphaned (not in
204 * the table) then input packets should not reach here.
205 * Otherwise, a concurrent request that yanks the table
206 * should be blocked by other interlocking and/or by first
207 * shutting the driver down. Regardless, be defensive
210 /* XXX need msg+stat */
214 IEEE80211_NODE_LOCK(ni->ni_table);
215 mfrag = ni->ni_rxfrag[0];
216 ni->ni_rxfrag[0] = NULL;
217 IEEE80211_NODE_UNLOCK(ni->ni_table);
220 * Validate new fragment is in order and
221 * related to the previous ones.
226 lwh = mtod(mfrag, struct ieee80211_frame *);
227 last_rxseq = le16toh(*(uint16_t *)lwh->i_seq);
229 * NB: check seq # and frag together. Also check that both
230 * fragments are plaintext or that both are encrypted.
232 if (rxseq == last_rxseq+1 &&
233 IEEE80211_ADDR_EQ(wh->i_addr1, lwh->i_addr1) &&
234 IEEE80211_ADDR_EQ(wh->i_addr2, lwh->i_addr2) &&
235 !((wh->i_fc[1] ^ lwh->i_fc[1]) & IEEE80211_FC1_PROTECTED)) {
236 /* XXX clear MORE_FRAG bit? */
237 /* track last seqnum and fragno */
238 *(uint16_t *) lwh->i_seq = *(uint16_t *) wh->i_seq;
240 m_adj(m, hdrspace); /* strip header */
241 m_catpkt(mfrag, m); /* concatenate */
244 * Unrelated fragment or no space for it,
245 * clear current fragments.
253 if (fragno != 0) { /* !first fragment, discard */
254 vap->iv_stats.is_rx_defrag++;
255 IEEE80211_NODE_STAT(ni, rx_defrag);
261 if (more_frag) { /* more to come, save */
262 ni->ni_rxfragstamp = ticks;
263 ni->ni_rxfrag[0] = mfrag;
266 /* Remember to clear protected flag that was temporarily set. */
268 wh = mtod(mfrag, struct ieee80211_frame *);
269 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED;
275 ieee80211_deliver_data(struct ieee80211vap *vap,
276 struct ieee80211_node *ni, struct mbuf *m)
278 struct ether_header *eh = mtod(m, struct ether_header *);
279 struct ifnet *ifp = vap->iv_ifp;
281 /* clear driver/net80211 flags before passing up */
282 m->m_flags &= ~(M_MCAST | M_BCAST);
285 /* NB: see hostap_deliver_data, this path doesn't handle hostap */
286 KASSERT(vap->iv_opmode != IEEE80211_M_HOSTAP, ("gack, hostap"));
290 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
291 IEEE80211_NODE_STAT(ni, rx_data);
292 IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len);
293 if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
294 if (ETHER_IS_BROADCAST(eh->ether_dhost))
295 m->m_flags |= M_BCAST;
297 m->m_flags |= M_MCAST;
298 IEEE80211_NODE_STAT(ni, rx_mcast);
300 IEEE80211_NODE_STAT(ni, rx_ucast);
301 m->m_pkthdr.rcvif = ifp;
303 if (ni->ni_vlan != 0) {
304 /* attach vlan tag */
305 m->m_pkthdr.ether_vtag = ni->ni_vlan;
306 m->m_flags |= M_VLANTAG;
308 ifp->if_input(ifp, m);
312 ieee80211_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen,
315 struct ieee80211_qosframe_addr4 wh;
316 struct ether_header *eh;
319 KASSERT(hdrlen <= sizeof(wh),
320 ("hdrlen %d > max %zd", hdrlen, sizeof(wh)));
322 if (m->m_len < hdrlen + sizeof(*llc) &&
323 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
324 vap->iv_stats.is_rx_tooshort++;
328 memcpy(&wh, mtod(m, caddr_t), hdrlen);
329 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
330 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
331 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
332 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
333 /* NB: preserve AppleTalk frames that have a native SNAP hdr */
334 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
335 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX)) &&
336 /* Do not want to touch A-MSDU frames. */
337 !(qos & IEEE80211_QOS_AMSDU)) {
338 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
341 m_adj(m, hdrlen - sizeof(*eh));
343 eh = mtod(m, struct ether_header *);
344 switch (wh.i_fc[1] & IEEE80211_FC1_DIR_MASK) {
345 case IEEE80211_FC1_DIR_NODS:
346 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr1);
347 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr2);
349 case IEEE80211_FC1_DIR_TODS:
350 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr3);
351 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr2);
353 case IEEE80211_FC1_DIR_FROMDS:
354 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr1);
355 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr3);
357 case IEEE80211_FC1_DIR_DSTODS:
358 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr3);
359 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr4);
362 #ifndef __NO_STRICT_ALIGNMENT
363 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
364 m = ieee80211_realign(vap, m, sizeof(*eh));
368 #endif /* !__NO_STRICT_ALIGNMENT */
370 eh = mtod(m, struct ether_header *);
371 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
377 * Decap a frame encapsulated in a fast-frame/A-MSDU.
380 ieee80211_decap1(struct mbuf *m, int *framelen)
382 #define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc))
383 struct ether_header *eh;
385 const uint8_t llc_hdr_mac[ETHER_ADDR_LEN] = {
386 /* MAC address matching the 802.2 LLC header */
387 LLC_SNAP_LSAP, LLC_SNAP_LSAP, LLC_UI, 0, 0, 0
391 * The frame has an 802.3 header followed by an 802.2
392 * LLC header. The encapsulated frame length is in the
393 * first header type field; save that and overwrite it
394 * with the true type field found in the second. Then
395 * copy the 802.3 header up to where it belongs and
396 * adjust the mbuf contents to remove the void.
398 if (m->m_len < FF_LLC_SIZE && (m = m_pullup(m, FF_LLC_SIZE)) == NULL)
400 eh = mtod(m, struct ether_header *); /* 802.3 header is first */
403 * Detect possible attack where a single 802.11 frame is processed
404 * as an A-MSDU frame due to an adversary setting the A-MSDU present
405 * bit in the 802.11 QoS header. [FragAttacks]
407 if (memcmp(eh->ether_dhost, llc_hdr_mac, ETHER_ADDR_LEN) == 0)
410 llc = (struct llc *)&eh[1]; /* 802.2 header follows */
411 *framelen = ntohs(eh->ether_type) /* encap'd frame size */
412 + sizeof(struct ether_header) - sizeof(struct llc);
413 eh->ether_type = llc->llc_un.type_snap.ether_type;
414 ovbcopy(eh, mtod(m, uint8_t *) + sizeof(struct llc),
415 sizeof(struct ether_header));
416 m_adj(m, sizeof(struct llc));
422 * Install received rate set information in the node's state block.
425 ieee80211_setup_rates(struct ieee80211_node *ni,
426 const uint8_t *rates, const uint8_t *xrates, int flags)
428 struct ieee80211vap *vap = ni->ni_vap;
429 struct ieee80211_rateset *rs = &ni->ni_rates;
431 memset(rs, 0, sizeof(*rs));
432 rs->rs_nrates = rates[1];
433 memcpy(rs->rs_rates, rates + 2, rs->rs_nrates);
434 if (xrates != NULL) {
437 * Tack on 11g extended supported rate element.
440 if (rs->rs_nrates + nxrates > IEEE80211_RATE_MAXSIZE) {
441 nxrates = IEEE80211_RATE_MAXSIZE - rs->rs_nrates;
442 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE, ni,
443 "extended rate set too large; only using "
444 "%u of %u rates", nxrates, xrates[1]);
445 vap->iv_stats.is_rx_rstoobig++;
447 memcpy(rs->rs_rates + rs->rs_nrates, xrates+2, nxrates);
448 rs->rs_nrates += nxrates;
450 return ieee80211_fix_rate(ni, rs, flags);
454 * Send a management frame error response to the specified
455 * station. If ni is associated with the station then use
456 * it; otherwise allocate a temporary node suitable for
457 * transmitting the frame and then free the reference so
458 * it will go away as soon as the frame has been transmitted.
461 ieee80211_send_error(struct ieee80211_node *ni,
462 const uint8_t mac[IEEE80211_ADDR_LEN], int subtype, int arg)
464 struct ieee80211vap *vap = ni->ni_vap;
467 if (ni == vap->iv_bss) {
468 if (vap->iv_state != IEEE80211_S_RUN) {
470 * XXX hack until we get rid of this routine.
471 * We can be called prior to the vap reaching
472 * run state under certain conditions in which
473 * case iv_bss->ni_chan will not be setup.
474 * Check for this explicitly and and just ignore
479 ni = ieee80211_tmp_node(vap, mac);
487 IEEE80211_SEND_MGMT(ni, subtype, arg);
489 ieee80211_free_node(ni);
493 ieee80211_alloc_challenge(struct ieee80211_node *ni)
495 if (ni->ni_challenge == NULL)
496 ni->ni_challenge = (uint32_t *)
497 IEEE80211_MALLOC(IEEE80211_CHALLENGE_LEN,
498 M_80211_NODE, IEEE80211_M_NOWAIT);
499 if (ni->ni_challenge == NULL) {
500 IEEE80211_NOTE(ni->ni_vap,
501 IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni,
502 "%s", "shared key challenge alloc failed");
505 return (ni->ni_challenge != NULL);
509 * Parse a Beacon or ProbeResponse frame and return the
510 * useful information in an ieee80211_scanparams structure.
511 * Status is set to 0 if no problems were found; otherwise
512 * a bitmask of IEEE80211_BPARSE_* items is returned that
513 * describes the problems detected.
516 ieee80211_parse_beacon(struct ieee80211_node *ni, struct mbuf *m,
517 struct ieee80211_channel *rxchan, struct ieee80211_scanparams *scan)
519 struct ieee80211vap *vap = ni->ni_vap;
520 struct ieee80211com *ic = ni->ni_ic;
521 struct ieee80211_frame *wh;
524 wh = mtod(m, struct ieee80211_frame *);
525 frm = (uint8_t *)&wh[1];
526 efrm = mtod(m, uint8_t *) + m->m_len;
529 * beacon/probe response frame format
531 * XXX Update from 802.11-2012 - eg where HT is
533 * [2] beacon interval
534 * [2] capability information
536 * [tlv] supported rates
537 * [tlv] country information
538 * [tlv] channel switch announcement (CSA)
539 * [tlv] parameter set (FH/DS)
540 * [tlv] erp information
541 * [tlv] extended supported rates
544 * [tlv] HT capabilities
545 * [tlv] HT information
546 * [tlv] VHT capabilities
547 * [tlv] VHT information
548 * [tlv] Atheros capabilities
550 * [tlv] Mesh Configuration
552 IEEE80211_VERIFY_LENGTH(efrm - frm, 12,
553 return (scan->status = IEEE80211_BPARSE_BADIELEN));
554 memset(scan, 0, sizeof(*scan));
555 scan->tstamp = frm; frm += 8;
556 scan->bintval = le16toh(*(uint16_t *)frm); frm += 2;
557 scan->capinfo = le16toh(*(uint16_t *)frm); frm += 2;
558 scan->bchan = ieee80211_chan2ieee(ic, rxchan);
559 scan->chan = scan->bchan;
561 scan->ies_len = efrm - frm;
563 while (efrm - frm > 1) {
564 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2,
565 return (scan->status = IEEE80211_BPARSE_BADIELEN));
567 case IEEE80211_ELEMID_SSID:
570 case IEEE80211_ELEMID_RATES:
573 case IEEE80211_ELEMID_COUNTRY:
576 case IEEE80211_ELEMID_CSA:
579 case IEEE80211_ELEMID_QUIET:
582 case IEEE80211_ELEMID_FHPARMS:
583 if (ic->ic_phytype == IEEE80211_T_FH) {
584 scan->fhdwell = le16dec(&frm[2]);
585 scan->chan = IEEE80211_FH_CHAN(frm[4], frm[5]);
586 scan->fhindex = frm[6];
589 case IEEE80211_ELEMID_DSPARMS:
591 * XXX hack this since depending on phytype
592 * is problematic for multi-mode devices.
594 if (ic->ic_phytype != IEEE80211_T_FH)
597 case IEEE80211_ELEMID_TIM:
600 scan->timoff = frm - mtod(m, uint8_t *);
602 case IEEE80211_ELEMID_IBSSPARMS:
603 case IEEE80211_ELEMID_CFPARMS:
604 case IEEE80211_ELEMID_PWRCNSTR:
605 case IEEE80211_ELEMID_BSSLOAD:
606 case IEEE80211_ELEMID_APCHANREP:
607 /* NB: avoid debugging complaints */
609 case IEEE80211_ELEMID_XRATES:
612 case IEEE80211_ELEMID_ERP:
614 IEEE80211_DISCARD_IE(vap,
615 IEEE80211_MSG_ELEMID, wh, "ERP",
616 "bad len %u", frm[1]);
617 vap->iv_stats.is_rx_elem_toobig++;
620 scan->erp = frm[2] | 0x100;
622 case IEEE80211_ELEMID_HTCAP:
625 case IEEE80211_ELEMID_VHT_CAP:
628 case IEEE80211_ELEMID_VHT_OPMODE:
629 scan->vhtopmode = frm;
631 case IEEE80211_ELEMID_RSN:
634 case IEEE80211_ELEMID_HTINFO:
637 #ifdef IEEE80211_SUPPORT_MESH
638 case IEEE80211_ELEMID_MESHID:
641 case IEEE80211_ELEMID_MESHCONF:
642 scan->meshconf = frm;
645 /* Extended capabilities; nothing handles it for now */
646 case IEEE80211_ELEMID_EXTCAP:
648 case IEEE80211_ELEMID_VENDOR:
651 else if (iswmeparam(frm) || iswmeinfo(frm))
653 #ifdef IEEE80211_SUPPORT_SUPERG
654 else if (isatherosoui(frm))
657 #ifdef IEEE80211_SUPPORT_TDMA
658 else if (istdmaoui(frm))
661 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) {
663 * Accept pre-draft HT ie's if the
664 * standard ones have not been seen.
666 if (ishtcapoui(frm)) {
667 if (scan->htcap == NULL)
669 } else if (ishtinfooui(frm)) {
670 if (scan->htinfo == NULL)
676 IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID,
678 "id %u, len %u", *frm, frm[1]);
679 vap->iv_stats.is_rx_elem_unknown++;
684 IEEE80211_VERIFY_ELEMENT(scan->rates, IEEE80211_RATE_MAXSIZE,
685 scan->status |= IEEE80211_BPARSE_RATES_INVALID);
686 if (scan->rates != NULL && scan->xrates != NULL) {
688 * NB: don't process XRATES if RATES is missing. This
689 * avoids a potential null ptr deref and should be ok
690 * as the return code will already note RATES is missing
691 * (so callers shouldn't otherwise process the frame).
693 IEEE80211_VERIFY_ELEMENT(scan->xrates,
694 IEEE80211_RATE_MAXSIZE - scan->rates[1],
695 scan->status |= IEEE80211_BPARSE_XRATES_INVALID);
697 IEEE80211_VERIFY_ELEMENT(scan->ssid, IEEE80211_NWID_LEN,
698 scan->status |= IEEE80211_BPARSE_SSID_INVALID);
699 if (scan->chan != scan->bchan && ic->ic_phytype != IEEE80211_T_FH) {
701 * Frame was received on a channel different from the
702 * one indicated in the DS params element id;
703 * silently discard it.
705 * NB: this can happen due to signal leakage.
706 * But we should take it for FH phy because
707 * the rssi value should be correct even for
708 * different hop pattern in FH.
710 IEEE80211_DISCARD(vap,
711 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
712 wh, NULL, "for off-channel %u (bchan=%u)",
713 scan->chan, scan->bchan);
714 vap->iv_stats.is_rx_chanmismatch++;
715 scan->status |= IEEE80211_BPARSE_OFFCHAN;
717 if (!(IEEE80211_BINTVAL_MIN <= scan->bintval &&
718 scan->bintval <= IEEE80211_BINTVAL_MAX)) {
719 IEEE80211_DISCARD(vap,
720 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
721 wh, NULL, "bogus beacon interval (%d TU)",
722 (int) scan->bintval);
723 vap->iv_stats.is_rx_badbintval++;
724 scan->status |= IEEE80211_BPARSE_BINTVAL_INVALID;
726 if (scan->country != NULL) {
728 * Validate we have at least enough data to extract
729 * the country code. Not sure if we should return an
730 * error instead of discarding the IE; consider this
731 * being lenient as we don't depend on the data for
734 IEEE80211_VERIFY_LENGTH(scan->country[1], 3 * sizeof(uint8_t),
735 scan->country = NULL);
737 if (scan->csa != NULL) {
739 * Validate Channel Switch Announcement; this must
740 * be the correct length or we toss the frame.
742 IEEE80211_VERIFY_LENGTH(scan->csa[1], 3 * sizeof(uint8_t),
743 scan->status |= IEEE80211_BPARSE_CSA_INVALID);
745 #ifdef IEEE80211_SUPPORT_MESH
746 if (scan->meshid != NULL) {
747 IEEE80211_VERIFY_ELEMENT(scan->meshid, IEEE80211_MESHID_LEN,
748 scan->status |= IEEE80211_BPARSE_RATES_INVALID);
752 * Process HT ie's. This is complicated by our
753 * accepting both the standard ie's and the pre-draft
754 * vendor OUI ie's that some vendors still use/require.
756 if (scan->htcap != NULL) {
757 IEEE80211_VERIFY_LENGTH(scan->htcap[1],
758 scan->htcap[0] == IEEE80211_ELEMID_VENDOR ?
759 4 + sizeof(struct ieee80211_ie_htcap)-2 :
760 sizeof(struct ieee80211_ie_htcap)-2,
763 if (scan->htinfo != NULL) {
764 IEEE80211_VERIFY_LENGTH(scan->htinfo[1],
765 scan->htinfo[0] == IEEE80211_ELEMID_VENDOR ?
766 4 + sizeof(struct ieee80211_ie_htinfo)-2 :
767 sizeof(struct ieee80211_ie_htinfo)-2,
768 scan->htinfo = NULL);
771 /* Process VHT IEs */
772 if (scan->vhtcap != NULL) {
773 IEEE80211_VERIFY_LENGTH(scan->vhtcap[1],
774 sizeof(struct ieee80211_ie_vhtcap) - 2,
775 scan->vhtcap = NULL);
777 if (scan->vhtopmode != NULL) {
778 IEEE80211_VERIFY_LENGTH(scan->vhtopmode[1],
779 sizeof(struct ieee80211_ie_vht_operation) - 2,
780 scan->vhtopmode = NULL);
787 * Parse an Action frame. Return 0 on success, non-zero on failure.
790 ieee80211_parse_action(struct ieee80211_node *ni, struct mbuf *m)
792 struct ieee80211vap *vap = ni->ni_vap;
793 const struct ieee80211_action *ia;
794 struct ieee80211_frame *wh;
798 * action frame format:
803 wh = mtod(m, struct ieee80211_frame *);
804 frm = (u_int8_t *)&wh[1];
805 efrm = mtod(m, u_int8_t *) + m->m_len;
806 IEEE80211_VERIFY_LENGTH(efrm - frm,
807 sizeof(struct ieee80211_action), return EINVAL);
808 ia = (const struct ieee80211_action *) frm;
810 vap->iv_stats.is_rx_action++;
811 IEEE80211_NODE_STAT(ni, rx_action);
813 /* verify frame payloads but defer processing */
814 switch (ia->ia_category) {
815 case IEEE80211_ACTION_CAT_BA:
816 switch (ia->ia_action) {
817 case IEEE80211_ACTION_BA_ADDBA_REQUEST:
818 IEEE80211_VERIFY_LENGTH(efrm - frm,
819 sizeof(struct ieee80211_action_ba_addbarequest),
822 case IEEE80211_ACTION_BA_ADDBA_RESPONSE:
823 IEEE80211_VERIFY_LENGTH(efrm - frm,
824 sizeof(struct ieee80211_action_ba_addbaresponse),
827 case IEEE80211_ACTION_BA_DELBA:
828 IEEE80211_VERIFY_LENGTH(efrm - frm,
829 sizeof(struct ieee80211_action_ba_delba),
834 case IEEE80211_ACTION_CAT_HT:
835 switch (ia->ia_action) {
836 case IEEE80211_ACTION_HT_TXCHWIDTH:
837 IEEE80211_VERIFY_LENGTH(efrm - frm,
838 sizeof(struct ieee80211_action_ht_txchwidth),
841 case IEEE80211_ACTION_HT_MIMOPWRSAVE:
842 IEEE80211_VERIFY_LENGTH(efrm - frm,
843 sizeof(struct ieee80211_action_ht_mimopowersave),
848 #ifdef IEEE80211_SUPPORT_MESH
849 case IEEE80211_ACTION_CAT_MESH:
850 switch (ia->ia_action) {
851 case IEEE80211_ACTION_MESH_LMETRIC:
853 * XXX: verification is true only if we are using
854 * Airtime link metric (default)
856 IEEE80211_VERIFY_LENGTH(efrm - frm,
857 sizeof(struct ieee80211_meshlmetric_ie),
860 case IEEE80211_ACTION_MESH_HWMP:
861 /* verify something */
863 case IEEE80211_ACTION_MESH_GANN:
864 IEEE80211_VERIFY_LENGTH(efrm - frm,
865 sizeof(struct ieee80211_meshgann_ie),
868 case IEEE80211_ACTION_MESH_CC:
869 case IEEE80211_ACTION_MESH_MCCA_SREQ:
870 case IEEE80211_ACTION_MESH_MCCA_SREP:
871 case IEEE80211_ACTION_MESH_MCCA_AREQ:
872 case IEEE80211_ACTION_MESH_MCCA_ADVER:
873 case IEEE80211_ACTION_MESH_MCCA_TRDOWN:
874 case IEEE80211_ACTION_MESH_TBTT_REQ:
875 case IEEE80211_ACTION_MESH_TBTT_RES:
876 /* reject these early on, not implemented */
877 IEEE80211_DISCARD(vap,
878 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
879 wh, NULL, "not implemented yet, act=0x%02X",
884 case IEEE80211_ACTION_CAT_SELF_PROT:
885 /* If TA or RA group address discard silently */
886 if (IEEE80211_IS_MULTICAST(wh->i_addr1) ||
887 IEEE80211_IS_MULTICAST(wh->i_addr2))
890 * XXX: Should we verify complete length now or it is
891 * to varying in sizes?
893 switch (ia->ia_action) {
894 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
895 case IEEE80211_ACTION_MESHPEERING_CLOSE:
896 /* is not a peering candidate (yet) */
897 if (ni == vap->iv_bss)
903 case IEEE80211_ACTION_CAT_VHT:
904 printf("%s: TODO: VHT handling!\n", __func__);
910 #ifdef IEEE80211_DEBUG
915 ieee80211_ssid_mismatch(struct ieee80211vap *vap, const char *tag,
916 uint8_t mac[IEEE80211_ADDR_LEN], uint8_t *ssid)
918 printf("[%s] discard %s frame, ssid mismatch: ",
919 ether_sprintf(mac), tag);
920 ieee80211_print_essid(ssid + 2, ssid[1]);
925 * Return the bssid of a frame.
927 static const uint8_t *
928 ieee80211_getbssid(const struct ieee80211vap *vap,
929 const struct ieee80211_frame *wh)
931 if (vap->iv_opmode == IEEE80211_M_STA)
933 if ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) != IEEE80211_FC1_DIR_NODS)
935 if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL)
940 #include <machine/stdarg.h>
943 ieee80211_note(const struct ieee80211vap *vap, const char *fmt, ...)
945 char buf[256]; /* XXX */
950 len = vsnprintf(buf, sizeof(buf), fmt, ap);
953 if_printf(vap->iv_ifp, "%s", buf); /* NB: no \n */
955 if (len >= sizeof(buf))
956 printf("%s: XXX buffer too small: len = %d\n", __func__, len);
960 ieee80211_note_frame(const struct ieee80211vap *vap,
961 const struct ieee80211_frame *wh,
962 const char *fmt, ...)
964 char buf[256]; /* XXX */
969 len = vsnprintf(buf, sizeof(buf), fmt, ap);
971 if_printf(vap->iv_ifp, "[%s] %s\n",
972 ether_sprintf(ieee80211_getbssid(vap, wh)), buf);
974 if (len >= sizeof(buf))
975 printf("%s: XXX buffer too small: len = %d\n", __func__, len);
979 ieee80211_note_mac(const struct ieee80211vap *vap,
980 const uint8_t mac[IEEE80211_ADDR_LEN],
981 const char *fmt, ...)
983 char buf[256]; /* XXX */
988 len = vsnprintf(buf, sizeof(buf), fmt, ap);
990 if_printf(vap->iv_ifp, "[%s] %s\n", ether_sprintf(mac), buf);
992 if (len >= sizeof(buf))
993 printf("%s: XXX buffer too small: len = %d\n", __func__, len);
997 ieee80211_discard_frame(const struct ieee80211vap *vap,
998 const struct ieee80211_frame *wh,
999 const char *type, const char *fmt, ...)
1001 char buf[256]; /* XXX */
1006 len = vsnprintf(buf, sizeof(buf), fmt, ap);
1009 if_printf(vap->iv_ifp, "[%s] discard %s frame, %s\n",
1010 ether_sprintf(ieee80211_getbssid(vap, wh)),
1011 type != NULL ? type : ieee80211_mgt_subtype_name(wh->i_fc[0]),
1014 if (len >= sizeof(buf))
1015 printf("%s: XXX buffer too small: len = %d\n", __func__, len);
1019 ieee80211_discard_ie(const struct ieee80211vap *vap,
1020 const struct ieee80211_frame *wh,
1021 const char *type, const char *fmt, ...)
1023 char buf[256]; /* XXX */
1028 len = vsnprintf(buf, sizeof(buf), fmt, ap);
1031 if_printf(vap->iv_ifp, "[%s] discard%s%s information element, %s\n",
1032 ether_sprintf(ieee80211_getbssid(vap, wh)),
1033 type != NULL ? " " : "", type != NULL ? type : "", buf);
1035 if (len >= sizeof(buf))
1036 printf("%s: XXX buffer too small: len = %d\n", __func__, len);
1040 ieee80211_discard_mac(const struct ieee80211vap *vap,
1041 const uint8_t mac[IEEE80211_ADDR_LEN],
1042 const char *type, const char *fmt, ...)
1044 char buf[256]; /* XXX */
1049 len = vsnprintf(buf, sizeof(buf), fmt, ap);
1052 if_printf(vap->iv_ifp, "[%s] discard%s%s frame, %s\n",
1054 type != NULL ? " " : "", type != NULL ? type : "", buf);
1056 if (len >= sizeof(buf))
1057 printf("%s: XXX buffer too small: len = %d\n", __func__, len);
1059 #endif /* IEEE80211_DEBUG */