2 * SPDX-License-Identifier: BSD-2-Clause
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>
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_private.h>
47 #include <net/if_vlan_var.h>
49 #include <net80211/ieee80211_var.h>
50 #include <net80211/ieee80211_input.h>
51 #ifdef IEEE80211_SUPPORT_MESH
52 #include <net80211/ieee80211_mesh.h>
58 #include <netinet/in.h>
59 #include <net/ethernet.h>
63 ieee80211_process_mimo(struct ieee80211_node *ni, struct ieee80211_rx_stats *rx)
67 /* Verify the required MIMO bits are set */
68 if ((rx->r_flags & (IEEE80211_R_C_CHAIN | IEEE80211_R_C_NF | IEEE80211_R_C_RSSI)) !=
69 (IEEE80211_R_C_CHAIN | IEEE80211_R_C_NF | IEEE80211_R_C_RSSI))
72 /* XXX This assumes the MIMO radios have both ctl and ext chains */
73 for (i = 0; i < MIN(rx->c_chain, IEEE80211_MAX_CHAINS); i++) {
74 IEEE80211_RSSI_LPF(ni->ni_mimo_rssi_ctl[i], rx->c_rssi_ctl[i]);
75 IEEE80211_RSSI_LPF(ni->ni_mimo_rssi_ext[i], rx->c_rssi_ext[i]);
78 /* XXX This also assumes the MIMO radios have both ctl and ext chains */
79 for(i = 0; i < MIN(rx->c_chain, IEEE80211_MAX_CHAINS); i++) {
80 ni->ni_mimo_noise_ctl[i] = rx->c_nf_ctl[i];
81 ni->ni_mimo_noise_ext[i] = rx->c_nf_ext[i];
83 ni->ni_mimo_chains = rx->c_chain;
87 ieee80211_input_mimo(struct ieee80211_node *ni, struct mbuf *m)
89 struct ieee80211_rx_stats rxs;
91 /* try to read stats from mbuf */
92 bzero(&rxs, sizeof(rxs));
93 if (ieee80211_get_rx_params(m, &rxs) != 0)
96 /* XXX should assert IEEE80211_R_NF and IEEE80211_R_RSSI are set */
97 ieee80211_process_mimo(ni, &rxs);
99 //return ieee80211_input(ni, m, rx->rssi, rx->nf);
100 return ni->ni_vap->iv_input(ni, m, &rxs, rxs.c_rssi, rxs.c_nf);
104 ieee80211_input_all(struct ieee80211com *ic, struct mbuf *m, int rssi, int nf)
106 struct ieee80211_rx_stats rx;
108 rx.r_flags = IEEE80211_R_NF | IEEE80211_R_RSSI;
112 if (!ieee80211_add_rx_params(m, &rx))
115 return ieee80211_input_mimo_all(ic, m);
119 ieee80211_input_mimo_all(struct ieee80211com *ic, struct mbuf *m)
121 struct ieee80211vap *vap;
124 m->m_flags |= M_BCAST; /* NB: mark for bpf tap'ing */
127 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
128 struct ieee80211_node *ni;
131 /* NB: could check for IFF_UP but this is cheaper */
132 if (vap->iv_state == IEEE80211_S_INIT)
135 * WDS vap's only receive directed traffic from the
136 * station at the ``far end''. That traffic should
137 * be passed through the AP vap the station is associated
138 * to--so don't spam them with mcast frames.
140 if (vap->iv_opmode == IEEE80211_M_WDS)
142 if (TAILQ_NEXT(vap, iv_next) != NULL) {
144 * Packet contents are changed by ieee80211_decap
145 * so do a deep copy of the packet.
146 * NB: tags are copied too.
148 mcopy = m_dup(m, IEEE80211_M_NOWAIT);
157 ni = ieee80211_ref_node(vap->iv_bss);
158 type = ieee80211_input_mimo(ni, mcopy);
159 ieee80211_free_node(ni);
161 if (m != NULL) /* no vaps, reclaim mbuf */
167 * This function reassembles fragments.
169 * XXX should handle 3 concurrent reassemblies per-spec.
172 ieee80211_defrag(struct ieee80211_node *ni, struct mbuf *m, int hdrspace,
175 struct ieee80211vap *vap = ni->ni_vap;
176 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
177 struct ieee80211_frame *lwh;
180 uint8_t more_frag = wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG;
183 KASSERT(!IEEE80211_IS_MULTICAST(wh->i_addr1), ("multicast fragm?"));
185 rxseq = le16toh(*(uint16_t *)wh->i_seq);
186 fragno = rxseq & IEEE80211_SEQ_FRAG_MASK;
188 /* Quick way out, if there's nothing to defragment */
189 if (!more_frag && fragno == 0 && ni->ni_rxfrag[0] == NULL)
192 /* Temporarily set flag to remember if fragment was encrypted. */
193 /* XXX use a non-packet altering storage for this in the future. */
195 wh->i_fc[1] |= IEEE80211_FC1_PROTECTED;
198 * Remove frag to insure it doesn't get reaped by timer.
200 if (ni->ni_table == NULL) {
202 * Should never happen. If the node is orphaned (not in
203 * the table) then input packets should not reach here.
204 * Otherwise, a concurrent request that yanks the table
205 * should be blocked by other interlocking and/or by first
206 * shutting the driver down. Regardless, be defensive
209 /* XXX need msg+stat */
213 IEEE80211_NODE_LOCK(ni->ni_table);
214 mfrag = ni->ni_rxfrag[0];
215 ni->ni_rxfrag[0] = NULL;
216 IEEE80211_NODE_UNLOCK(ni->ni_table);
219 * Validate new fragment is in order and
220 * related to the previous ones.
225 lwh = mtod(mfrag, struct ieee80211_frame *);
226 last_rxseq = le16toh(*(uint16_t *)lwh->i_seq);
228 * NB: check seq # and frag together. Also check that both
229 * fragments are plaintext or that both are encrypted.
231 if (rxseq == last_rxseq+1 &&
232 IEEE80211_ADDR_EQ(wh->i_addr1, lwh->i_addr1) &&
233 IEEE80211_ADDR_EQ(wh->i_addr2, lwh->i_addr2) &&
234 !((wh->i_fc[1] ^ lwh->i_fc[1]) & IEEE80211_FC1_PROTECTED)) {
235 /* XXX clear MORE_FRAG bit? */
236 /* track last seqnum and fragno */
237 *(uint16_t *) lwh->i_seq = *(uint16_t *) wh->i_seq;
239 m_adj(m, hdrspace); /* strip header */
240 m_catpkt(mfrag, m); /* concatenate */
243 * Unrelated fragment or no space for it,
244 * clear current fragments.
252 if (fragno != 0) { /* !first fragment, discard */
253 vap->iv_stats.is_rx_defrag++;
254 IEEE80211_NODE_STAT(ni, rx_defrag);
260 if (more_frag) { /* more to come, save */
261 ni->ni_rxfragstamp = ticks;
262 ni->ni_rxfrag[0] = mfrag;
265 /* Remember to clear protected flag that was temporarily set. */
267 wh = mtod(mfrag, struct ieee80211_frame *);
268 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED;
274 ieee80211_deliver_data(struct ieee80211vap *vap,
275 struct ieee80211_node *ni, struct mbuf *m)
277 struct epoch_tracker et;
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;
309 ifp->if_input(ifp, m);
314 ieee80211_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen,
317 struct ieee80211_qosframe_addr4 wh;
318 struct ether_header *eh;
321 KASSERT(hdrlen <= sizeof(wh),
322 ("hdrlen %d > max %zd", hdrlen, sizeof(wh)));
324 if (m->m_len < hdrlen + sizeof(*llc) &&
325 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
326 vap->iv_stats.is_rx_tooshort++;
330 memcpy(&wh, mtod(m, caddr_t), hdrlen);
331 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
332 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
333 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
334 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
335 /* NB: preserve AppleTalk frames that have a native SNAP hdr */
336 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
337 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX)) &&
338 /* Do not want to touch A-MSDU frames. */
339 !(qos & IEEE80211_QOS_AMSDU)) {
340 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
343 m_adj(m, hdrlen - sizeof(*eh));
345 eh = mtod(m, struct ether_header *);
346 switch (wh.i_fc[1] & IEEE80211_FC1_DIR_MASK) {
347 case IEEE80211_FC1_DIR_NODS:
348 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr1);
349 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr2);
351 case IEEE80211_FC1_DIR_TODS:
352 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr3);
353 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr2);
355 case IEEE80211_FC1_DIR_FROMDS:
356 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr1);
357 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr3);
359 case IEEE80211_FC1_DIR_DSTODS:
360 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr3);
361 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr4);
364 #ifndef __NO_STRICT_ALIGNMENT
365 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
366 m = ieee80211_realign(vap, m, sizeof(*eh));
370 #endif /* !__NO_STRICT_ALIGNMENT */
372 eh = mtod(m, struct ether_header *);
373 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
379 * Decap a frame encapsulated in a fast-frame/A-MSDU.
382 ieee80211_decap1(struct mbuf *m, int *framelen)
384 #define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc))
385 struct ether_header *eh;
387 const uint8_t llc_hdr_mac[ETHER_ADDR_LEN] = {
388 /* MAC address matching the 802.2 LLC header */
389 LLC_SNAP_LSAP, LLC_SNAP_LSAP, LLC_UI, 0, 0, 0
393 * The frame has an 802.3 header followed by an 802.2
394 * LLC header. The encapsulated frame length is in the
395 * first header type field; save that and overwrite it
396 * with the true type field found in the second. Then
397 * copy the 802.3 header up to where it belongs and
398 * adjust the mbuf contents to remove the void.
400 if (m->m_len < FF_LLC_SIZE && (m = m_pullup(m, FF_LLC_SIZE)) == NULL)
402 eh = mtod(m, struct ether_header *); /* 802.3 header is first */
405 * Detect possible attack where a single 802.11 frame is processed
406 * as an A-MSDU frame due to an adversary setting the A-MSDU present
407 * bit in the 802.11 QoS header. [FragAttacks]
409 if (memcmp(eh->ether_dhost, llc_hdr_mac, ETHER_ADDR_LEN) == 0)
412 llc = (struct llc *)&eh[1]; /* 802.2 header follows */
413 *framelen = ntohs(eh->ether_type) /* encap'd frame size */
414 + sizeof(struct ether_header) - sizeof(struct llc);
415 eh->ether_type = llc->llc_un.type_snap.ether_type;
416 ovbcopy(eh, mtod(m, uint8_t *) + sizeof(struct llc),
417 sizeof(struct ether_header));
418 m_adj(m, sizeof(struct llc));
424 * Install received rate set information in the node's state block.
427 ieee80211_setup_rates(struct ieee80211_node *ni,
428 const uint8_t *rates, const uint8_t *xrates, int flags)
430 struct ieee80211vap *vap = ni->ni_vap;
431 struct ieee80211_rateset *rs = &ni->ni_rates;
433 memset(rs, 0, sizeof(*rs));
434 rs->rs_nrates = rates[1];
435 memcpy(rs->rs_rates, rates + 2, rs->rs_nrates);
436 if (xrates != NULL) {
439 * Tack on 11g extended supported rate element.
442 if (rs->rs_nrates + nxrates > IEEE80211_RATE_MAXSIZE) {
443 nxrates = IEEE80211_RATE_MAXSIZE - rs->rs_nrates;
444 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE, ni,
445 "extended rate set too large; only using "
446 "%u of %u rates", nxrates, xrates[1]);
447 vap->iv_stats.is_rx_rstoobig++;
449 memcpy(rs->rs_rates + rs->rs_nrates, xrates+2, nxrates);
450 rs->rs_nrates += nxrates;
452 return ieee80211_fix_rate(ni, rs, flags);
456 * Send a management frame error response to the specified
457 * station. If ni is associated with the station then use
458 * it; otherwise allocate a temporary node suitable for
459 * transmitting the frame and then free the reference so
460 * it will go away as soon as the frame has been transmitted.
463 ieee80211_send_error(struct ieee80211_node *ni,
464 const uint8_t mac[IEEE80211_ADDR_LEN], int subtype, int arg)
466 struct ieee80211vap *vap = ni->ni_vap;
469 if (ni == vap->iv_bss) {
470 if (vap->iv_state != IEEE80211_S_RUN) {
472 * XXX hack until we get rid of this routine.
473 * We can be called prior to the vap reaching
474 * run state under certain conditions in which
475 * case iv_bss->ni_chan will not be setup.
476 * Check for this explicitly and and just ignore
481 ni = ieee80211_tmp_node(vap, mac);
489 IEEE80211_SEND_MGMT(ni, subtype, arg);
491 ieee80211_free_node(ni);
495 ieee80211_alloc_challenge(struct ieee80211_node *ni)
497 if (ni->ni_challenge == NULL)
498 ni->ni_challenge = (uint32_t *)
499 IEEE80211_MALLOC(IEEE80211_CHALLENGE_LEN,
500 M_80211_NODE, IEEE80211_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 * Parse a Beacon or ProbeResponse frame and return the
512 * useful information in an ieee80211_scanparams structure.
513 * Status is set to 0 if no problems were found; otherwise
514 * a bitmask of IEEE80211_BPARSE_* items is returned that
515 * describes the problems detected.
518 ieee80211_parse_beacon(struct ieee80211_node *ni, struct mbuf *m,
519 struct ieee80211_channel *rxchan, struct ieee80211_scanparams *scan)
521 struct ieee80211vap *vap = ni->ni_vap;
522 struct ieee80211com *ic = ni->ni_ic;
523 struct ieee80211_frame *wh;
526 wh = mtod(m, struct ieee80211_frame *);
527 frm = (uint8_t *)&wh[1];
528 efrm = mtod(m, uint8_t *) + m->m_len;
531 * beacon/probe response frame format
533 * XXX Update from 802.11-2012 - eg where HT is
535 * [2] beacon interval
536 * [2] capability information
538 * [tlv] supported rates
539 * [tlv] country information
540 * [tlv] channel switch announcement (CSA)
541 * [tlv] parameter set (FH/DS)
542 * [tlv] erp information
543 * [tlv] extended supported rates
546 * [tlv] HT capabilities
547 * [tlv] HT information
548 * [tlv] VHT capabilities
549 * [tlv] VHT information
550 * [tlv] Atheros capabilities
552 * [tlv] Mesh Configuration
554 IEEE80211_VERIFY_LENGTH(efrm - frm, 12,
555 return (scan->status = IEEE80211_BPARSE_BADIELEN));
556 memset(scan, 0, sizeof(*scan));
557 scan->tstamp = frm; frm += 8;
558 scan->bintval = le16toh(*(uint16_t *)frm); frm += 2;
559 scan->capinfo = le16toh(*(uint16_t *)frm); frm += 2;
560 scan->bchan = ieee80211_chan2ieee(ic, rxchan);
561 scan->chan = scan->bchan;
563 scan->ies_len = efrm - frm;
565 while (efrm - frm > 1) {
566 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2,
567 return (scan->status = IEEE80211_BPARSE_BADIELEN));
569 case IEEE80211_ELEMID_SSID:
572 case IEEE80211_ELEMID_RATES:
575 case IEEE80211_ELEMID_COUNTRY:
578 case IEEE80211_ELEMID_CSA:
581 case IEEE80211_ELEMID_QUIET:
584 case IEEE80211_ELEMID_FHPARMS:
585 if (ic->ic_phytype == IEEE80211_T_FH) {
586 scan->fhdwell = le16dec(&frm[2]);
587 scan->chan = IEEE80211_FH_CHAN(frm[4], frm[5]);
588 scan->fhindex = frm[6];
591 case IEEE80211_ELEMID_DSPARMS:
593 * XXX hack this since depending on phytype
594 * is problematic for multi-mode devices.
596 if (ic->ic_phytype != IEEE80211_T_FH)
599 case IEEE80211_ELEMID_TIM:
602 scan->timoff = frm - mtod(m, uint8_t *);
604 case IEEE80211_ELEMID_IBSSPARMS:
605 case IEEE80211_ELEMID_CFPARMS:
606 case IEEE80211_ELEMID_PWRCNSTR:
607 case IEEE80211_ELEMID_BSSLOAD:
608 case IEEE80211_ELEMID_APCHANREP:
609 /* NB: avoid debugging complaints */
611 case IEEE80211_ELEMID_XRATES:
614 case IEEE80211_ELEMID_ERP:
616 IEEE80211_DISCARD_IE(vap,
617 IEEE80211_MSG_ELEMID, wh, "ERP",
618 "bad len %u", frm[1]);
619 vap->iv_stats.is_rx_elem_toobig++;
622 scan->erp = frm[2] | 0x100;
624 case IEEE80211_ELEMID_HTCAP:
627 case IEEE80211_ELEMID_VHT_CAP:
630 case IEEE80211_ELEMID_VHT_OPMODE:
631 scan->vhtopmode = frm;
633 case IEEE80211_ELEMID_RSN:
636 case IEEE80211_ELEMID_HTINFO:
639 #ifdef IEEE80211_SUPPORT_MESH
640 case IEEE80211_ELEMID_MESHID:
643 case IEEE80211_ELEMID_MESHCONF:
644 scan->meshconf = frm;
647 /* Extended capabilities; nothing handles it for now */
648 case IEEE80211_ELEMID_EXTCAP:
650 case IEEE80211_ELEMID_VENDOR:
653 else if (iswmeparam(frm) || iswmeinfo(frm))
655 #ifdef IEEE80211_SUPPORT_SUPERG
656 else if (isatherosoui(frm))
659 #ifdef IEEE80211_SUPPORT_TDMA
660 else if (istdmaoui(frm))
663 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) {
665 * Accept pre-draft HT ie's if the
666 * standard ones have not been seen.
668 if (ishtcapoui(frm)) {
669 if (scan->htcap == NULL)
671 } else if (ishtinfooui(frm)) {
672 if (scan->htinfo == NULL)
678 IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID,
680 "id %u, len %u", *frm, frm[1]);
681 vap->iv_stats.is_rx_elem_unknown++;
686 IEEE80211_VERIFY_ELEMENT(scan->rates, IEEE80211_RATE_MAXSIZE,
687 scan->status |= IEEE80211_BPARSE_RATES_INVALID);
688 if (scan->rates != NULL && scan->xrates != NULL) {
690 * NB: don't process XRATES if RATES is missing. This
691 * avoids a potential null ptr deref and should be ok
692 * as the return code will already note RATES is missing
693 * (so callers shouldn't otherwise process the frame).
695 IEEE80211_VERIFY_ELEMENT(scan->xrates,
696 IEEE80211_RATE_MAXSIZE - scan->rates[1],
697 scan->status |= IEEE80211_BPARSE_XRATES_INVALID);
699 IEEE80211_VERIFY_ELEMENT(scan->ssid, IEEE80211_NWID_LEN,
700 scan->status |= IEEE80211_BPARSE_SSID_INVALID);
701 if (scan->chan != scan->bchan && ic->ic_phytype != IEEE80211_T_FH) {
703 * Frame was received on a channel different from the
704 * one indicated in the DS params element id;
705 * silently discard it.
707 * NB: this can happen due to signal leakage.
708 * But we should take it for FH phy because
709 * the rssi value should be correct even for
710 * different hop pattern in FH.
712 IEEE80211_DISCARD(vap,
713 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
714 wh, NULL, "for off-channel %u (bchan=%u)",
715 scan->chan, scan->bchan);
716 vap->iv_stats.is_rx_chanmismatch++;
717 scan->status |= IEEE80211_BPARSE_OFFCHAN;
719 if (!(IEEE80211_BINTVAL_MIN <= scan->bintval &&
720 scan->bintval <= IEEE80211_BINTVAL_MAX)) {
721 IEEE80211_DISCARD(vap,
722 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
723 wh, NULL, "bogus beacon interval (%d TU)",
724 (int) scan->bintval);
725 vap->iv_stats.is_rx_badbintval++;
726 scan->status |= IEEE80211_BPARSE_BINTVAL_INVALID;
728 if (scan->country != NULL) {
730 * Validate we have at least enough data to extract
731 * the country code. Not sure if we should return an
732 * error instead of discarding the IE; consider this
733 * being lenient as we don't depend on the data for
736 IEEE80211_VERIFY_LENGTH(scan->country[1], 3 * sizeof(uint8_t),
737 scan->country = NULL);
739 if (scan->csa != NULL) {
741 * Validate Channel Switch Announcement; this must
742 * be the correct length or we toss the frame.
744 IEEE80211_VERIFY_LENGTH(scan->csa[1], 3 * sizeof(uint8_t),
745 scan->status |= IEEE80211_BPARSE_CSA_INVALID);
747 #ifdef IEEE80211_SUPPORT_MESH
748 if (scan->meshid != NULL) {
749 IEEE80211_VERIFY_ELEMENT(scan->meshid, IEEE80211_MESHID_LEN,
750 scan->status |= IEEE80211_BPARSE_MESHID_INVALID);
754 * Process HT ie's. This is complicated by our
755 * accepting both the standard ie's and the pre-draft
756 * vendor OUI ie's that some vendors still use/require.
758 if (scan->htcap != NULL) {
759 IEEE80211_VERIFY_LENGTH(scan->htcap[1],
760 scan->htcap[0] == IEEE80211_ELEMID_VENDOR ?
761 4 + sizeof(struct ieee80211_ie_htcap)-2 :
762 sizeof(struct ieee80211_ie_htcap)-2,
765 if (scan->htinfo != NULL) {
766 IEEE80211_VERIFY_LENGTH(scan->htinfo[1],
767 scan->htinfo[0] == IEEE80211_ELEMID_VENDOR ?
768 4 + sizeof(struct ieee80211_ie_htinfo)-2 :
769 sizeof(struct ieee80211_ie_htinfo)-2,
770 scan->htinfo = NULL);
773 /* Process VHT IEs */
774 if (scan->vhtcap != NULL) {
775 IEEE80211_VERIFY_LENGTH(scan->vhtcap[1],
776 sizeof(struct ieee80211_vht_cap),
777 scan->vhtcap = NULL);
779 if (scan->vhtopmode != NULL) {
780 IEEE80211_VERIFY_LENGTH(scan->vhtopmode[1],
781 sizeof(struct ieee80211_vht_operation),
782 scan->vhtopmode = NULL);
789 * Parse an Action frame. Return 0 on success, non-zero on failure.
792 ieee80211_parse_action(struct ieee80211_node *ni, struct mbuf *m)
794 struct ieee80211vap *vap = ni->ni_vap;
795 const struct ieee80211_action *ia;
796 struct ieee80211_frame *wh;
800 * action frame format:
805 wh = mtod(m, struct ieee80211_frame *);
806 frm = (u_int8_t *)&wh[1];
807 efrm = mtod(m, u_int8_t *) + m->m_len;
808 IEEE80211_VERIFY_LENGTH(efrm - frm,
809 sizeof(struct ieee80211_action), return EINVAL);
810 ia = (const struct ieee80211_action *) frm;
812 vap->iv_stats.is_rx_action++;
813 IEEE80211_NODE_STAT(ni, rx_action);
815 /* verify frame payloads but defer processing */
816 switch (ia->ia_category) {
817 case IEEE80211_ACTION_CAT_BA:
818 switch (ia->ia_action) {
819 case IEEE80211_ACTION_BA_ADDBA_REQUEST:
820 IEEE80211_VERIFY_LENGTH(efrm - frm,
821 sizeof(struct ieee80211_action_ba_addbarequest),
824 case IEEE80211_ACTION_BA_ADDBA_RESPONSE:
825 IEEE80211_VERIFY_LENGTH(efrm - frm,
826 sizeof(struct ieee80211_action_ba_addbaresponse),
829 case IEEE80211_ACTION_BA_DELBA:
830 IEEE80211_VERIFY_LENGTH(efrm - frm,
831 sizeof(struct ieee80211_action_ba_delba),
836 case IEEE80211_ACTION_CAT_HT:
837 switch (ia->ia_action) {
838 case IEEE80211_ACTION_HT_TXCHWIDTH:
839 IEEE80211_VERIFY_LENGTH(efrm - frm,
840 sizeof(struct ieee80211_action_ht_txchwidth),
843 case IEEE80211_ACTION_HT_MIMOPWRSAVE:
844 IEEE80211_VERIFY_LENGTH(efrm - frm,
845 sizeof(struct ieee80211_action_ht_mimopowersave),
850 #ifdef IEEE80211_SUPPORT_MESH
851 case IEEE80211_ACTION_CAT_MESH:
852 switch (ia->ia_action) {
853 case IEEE80211_ACTION_MESH_LMETRIC:
855 * XXX: verification is true only if we are using
856 * Airtime link metric (default)
858 IEEE80211_VERIFY_LENGTH(efrm - frm,
859 sizeof(struct ieee80211_meshlmetric_ie),
862 case IEEE80211_ACTION_MESH_HWMP:
863 /* verify something */
865 case IEEE80211_ACTION_MESH_GANN:
866 IEEE80211_VERIFY_LENGTH(efrm - frm,
867 sizeof(struct ieee80211_meshgann_ie),
870 case IEEE80211_ACTION_MESH_CC:
871 case IEEE80211_ACTION_MESH_MCCA_SREQ:
872 case IEEE80211_ACTION_MESH_MCCA_SREP:
873 case IEEE80211_ACTION_MESH_MCCA_AREQ:
874 case IEEE80211_ACTION_MESH_MCCA_ADVER:
875 case IEEE80211_ACTION_MESH_MCCA_TRDOWN:
876 case IEEE80211_ACTION_MESH_TBTT_REQ:
877 case IEEE80211_ACTION_MESH_TBTT_RES:
878 /* reject these early on, not implemented */
879 IEEE80211_DISCARD(vap,
880 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
881 wh, NULL, "not implemented yet, act=0x%02X",
886 case IEEE80211_ACTION_CAT_SELF_PROT:
887 /* If TA or RA group address discard silently */
888 if (IEEE80211_IS_MULTICAST(wh->i_addr1) ||
889 IEEE80211_IS_MULTICAST(wh->i_addr2))
892 * XXX: Should we verify complete length now or it is
893 * to varying in sizes?
895 switch (ia->ia_action) {
896 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
897 case IEEE80211_ACTION_MESHPEERING_CLOSE:
898 /* is not a peering candidate (yet) */
899 if (ni == vap->iv_bss)
905 case IEEE80211_ACTION_CAT_VHT:
906 printf("%s: TODO: VHT handling!\n", __func__);
912 #ifdef IEEE80211_DEBUG
917 ieee80211_ssid_mismatch(struct ieee80211vap *vap, const char *tag,
918 uint8_t mac[IEEE80211_ADDR_LEN], uint8_t *ssid)
920 printf("[%s] discard %s frame, ssid mismatch: ",
921 ether_sprintf(mac), tag);
922 ieee80211_print_essid(ssid + 2, ssid[1]);
927 * Return the bssid of a frame.
929 static const uint8_t *
930 ieee80211_getbssid(const struct ieee80211vap *vap,
931 const struct ieee80211_frame *wh)
933 if (vap->iv_opmode == IEEE80211_M_STA)
935 if ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) != IEEE80211_FC1_DIR_NODS)
937 if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL)
942 #include <machine/stdarg.h>
945 ieee80211_note(const struct ieee80211vap *vap, const char *fmt, ...)
947 char buf[256]; /* XXX */
952 len = vsnprintf(buf, sizeof(buf), fmt, ap);
955 if_printf(vap->iv_ifp, "%s", buf); /* NB: no \n */
957 if (len >= sizeof(buf))
958 printf("%s: XXX buffer too small: len = %d\n", __func__, len);
962 ieee80211_note_frame(const struct ieee80211vap *vap,
963 const struct ieee80211_frame *wh,
964 const char *fmt, ...)
966 char buf[256]; /* XXX */
971 len = vsnprintf(buf, sizeof(buf), fmt, ap);
973 if_printf(vap->iv_ifp, "[%s] %s\n",
974 ether_sprintf(ieee80211_getbssid(vap, wh)), buf);
976 if (len >= sizeof(buf))
977 printf("%s: XXX buffer too small: len = %d\n", __func__, len);
981 ieee80211_note_mac(const struct ieee80211vap *vap,
982 const uint8_t mac[IEEE80211_ADDR_LEN],
983 const char *fmt, ...)
985 char buf[256]; /* XXX */
990 len = vsnprintf(buf, sizeof(buf), fmt, ap);
992 if_printf(vap->iv_ifp, "[%s] %s\n", ether_sprintf(mac), buf);
994 if (len >= sizeof(buf))
995 printf("%s: XXX buffer too small: len = %d\n", __func__, len);
999 ieee80211_discard_frame(const struct ieee80211vap *vap,
1000 const struct ieee80211_frame *wh,
1001 const char *type, const char *fmt, ...)
1003 char buf[256]; /* XXX */
1008 len = vsnprintf(buf, sizeof(buf), fmt, ap);
1011 if_printf(vap->iv_ifp, "[%s] discard %s frame, %s\n",
1012 ether_sprintf(ieee80211_getbssid(vap, wh)),
1013 type != NULL ? type : ieee80211_mgt_subtype_name(wh->i_fc[0]),
1016 if (len >= sizeof(buf))
1017 printf("%s: XXX buffer too small: len = %d\n", __func__, len);
1021 ieee80211_discard_ie(const struct ieee80211vap *vap,
1022 const struct ieee80211_frame *wh,
1023 const char *type, const char *fmt, ...)
1025 char buf[256]; /* XXX */
1030 len = vsnprintf(buf, sizeof(buf), fmt, ap);
1033 if_printf(vap->iv_ifp, "[%s] discard%s%s information element, %s\n",
1034 ether_sprintf(ieee80211_getbssid(vap, wh)),
1035 type != NULL ? " " : "", type != NULL ? type : "", buf);
1037 if (len >= sizeof(buf))
1038 printf("%s: XXX buffer too small: len = %d\n", __func__, len);
1042 ieee80211_discard_mac(const struct ieee80211vap *vap,
1043 const uint8_t mac[IEEE80211_ADDR_LEN],
1044 const char *type, const char *fmt, ...)
1046 char buf[256]; /* XXX */
1051 len = vsnprintf(buf, sizeof(buf), fmt, ap);
1054 if_printf(vap->iv_ifp, "[%s] discard%s%s frame, %s\n",
1056 type != NULL ? " " : "", type != NULL ? type : "", buf);
1058 if (len >= sizeof(buf))
1059 printf("%s: XXX buffer too small: len = %d\n", __func__, len);
1061 #endif /* IEEE80211_DEBUG */