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_private.h>
49 #include <net/if_vlan_var.h>
51 #include <net80211/ieee80211_var.h>
52 #include <net80211/ieee80211_input.h>
53 #ifdef IEEE80211_SUPPORT_MESH
54 #include <net80211/ieee80211_mesh.h>
60 #include <netinet/in.h>
61 #include <net/ethernet.h>
65 ieee80211_process_mimo(struct ieee80211_node *ni, struct ieee80211_rx_stats *rx)
69 /* Verify the required MIMO bits are set */
70 if ((rx->r_flags & (IEEE80211_R_C_CHAIN | IEEE80211_R_C_NF | IEEE80211_R_C_RSSI)) !=
71 (IEEE80211_R_C_CHAIN | IEEE80211_R_C_NF | IEEE80211_R_C_RSSI))
74 /* XXX This assumes the MIMO radios have both ctl and ext chains */
75 for (i = 0; i < MIN(rx->c_chain, IEEE80211_MAX_CHAINS); i++) {
76 IEEE80211_RSSI_LPF(ni->ni_mimo_rssi_ctl[i], rx->c_rssi_ctl[i]);
77 IEEE80211_RSSI_LPF(ni->ni_mimo_rssi_ext[i], rx->c_rssi_ext[i]);
80 /* XXX This also assumes the MIMO radios have both ctl and ext chains */
81 for(i = 0; i < MIN(rx->c_chain, IEEE80211_MAX_CHAINS); i++) {
82 ni->ni_mimo_noise_ctl[i] = rx->c_nf_ctl[i];
83 ni->ni_mimo_noise_ext[i] = rx->c_nf_ext[i];
85 ni->ni_mimo_chains = rx->c_chain;
89 ieee80211_input_mimo(struct ieee80211_node *ni, struct mbuf *m)
91 struct ieee80211_rx_stats rxs;
93 /* try to read stats from mbuf */
94 bzero(&rxs, sizeof(rxs));
95 if (ieee80211_get_rx_params(m, &rxs) != 0)
98 /* XXX should assert IEEE80211_R_NF and IEEE80211_R_RSSI are set */
99 ieee80211_process_mimo(ni, &rxs);
101 //return ieee80211_input(ni, m, rx->rssi, rx->nf);
102 return ni->ni_vap->iv_input(ni, m, &rxs, rxs.c_rssi, rxs.c_nf);
106 ieee80211_input_all(struct ieee80211com *ic, struct mbuf *m, int rssi, int nf)
108 struct ieee80211_rx_stats rx;
110 rx.r_flags = IEEE80211_R_NF | IEEE80211_R_RSSI;
114 if (!ieee80211_add_rx_params(m, &rx))
117 return ieee80211_input_mimo_all(ic, m);
121 ieee80211_input_mimo_all(struct ieee80211com *ic, struct mbuf *m)
123 struct ieee80211vap *vap;
126 m->m_flags |= M_BCAST; /* NB: mark for bpf tap'ing */
129 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
130 struct ieee80211_node *ni;
133 /* NB: could check for IFF_UP but this is cheaper */
134 if (vap->iv_state == IEEE80211_S_INIT)
137 * WDS vap's only receive directed traffic from the
138 * station at the ``far end''. That traffic should
139 * be passed through the AP vap the station is associated
140 * to--so don't spam them with mcast frames.
142 if (vap->iv_opmode == IEEE80211_M_WDS)
144 if (TAILQ_NEXT(vap, iv_next) != NULL) {
146 * Packet contents are changed by ieee80211_decap
147 * so do a deep copy of the packet.
148 * NB: tags are copied too.
150 mcopy = m_dup(m, IEEE80211_M_NOWAIT);
159 ni = ieee80211_ref_node(vap->iv_bss);
160 type = ieee80211_input_mimo(ni, mcopy);
161 ieee80211_free_node(ni);
163 if (m != NULL) /* no vaps, reclaim mbuf */
169 * This function reassembles fragments.
171 * XXX should handle 3 concurrent reassemblies per-spec.
174 ieee80211_defrag(struct ieee80211_node *ni, struct mbuf *m, int hdrspace,
177 struct ieee80211vap *vap = ni->ni_vap;
178 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
179 struct ieee80211_frame *lwh;
182 uint8_t more_frag = wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG;
185 KASSERT(!IEEE80211_IS_MULTICAST(wh->i_addr1), ("multicast fragm?"));
187 rxseq = le16toh(*(uint16_t *)wh->i_seq);
188 fragno = rxseq & IEEE80211_SEQ_FRAG_MASK;
190 /* Quick way out, if there's nothing to defragment */
191 if (!more_frag && fragno == 0 && ni->ni_rxfrag[0] == NULL)
194 /* Temporarily set flag to remember if fragment was encrypted. */
195 /* XXX use a non-packet altering storage for this in the future. */
197 wh->i_fc[1] |= IEEE80211_FC1_PROTECTED;
200 * Remove frag to insure it doesn't get reaped by timer.
202 if (ni->ni_table == NULL) {
204 * Should never happen. If the node is orphaned (not in
205 * the table) then input packets should not reach here.
206 * Otherwise, a concurrent request that yanks the table
207 * should be blocked by other interlocking and/or by first
208 * shutting the driver down. Regardless, be defensive
211 /* XXX need msg+stat */
215 IEEE80211_NODE_LOCK(ni->ni_table);
216 mfrag = ni->ni_rxfrag[0];
217 ni->ni_rxfrag[0] = NULL;
218 IEEE80211_NODE_UNLOCK(ni->ni_table);
221 * Validate new fragment is in order and
222 * related to the previous ones.
227 lwh = mtod(mfrag, struct ieee80211_frame *);
228 last_rxseq = le16toh(*(uint16_t *)lwh->i_seq);
230 * NB: check seq # and frag together. Also check that both
231 * fragments are plaintext or that both are encrypted.
233 if (rxseq == last_rxseq+1 &&
234 IEEE80211_ADDR_EQ(wh->i_addr1, lwh->i_addr1) &&
235 IEEE80211_ADDR_EQ(wh->i_addr2, lwh->i_addr2) &&
236 !((wh->i_fc[1] ^ lwh->i_fc[1]) & IEEE80211_FC1_PROTECTED)) {
237 /* XXX clear MORE_FRAG bit? */
238 /* track last seqnum and fragno */
239 *(uint16_t *) lwh->i_seq = *(uint16_t *) wh->i_seq;
241 m_adj(m, hdrspace); /* strip header */
242 m_catpkt(mfrag, m); /* concatenate */
245 * Unrelated fragment or no space for it,
246 * clear current fragments.
254 if (fragno != 0) { /* !first fragment, discard */
255 vap->iv_stats.is_rx_defrag++;
256 IEEE80211_NODE_STAT(ni, rx_defrag);
262 if (more_frag) { /* more to come, save */
263 ni->ni_rxfragstamp = ticks;
264 ni->ni_rxfrag[0] = mfrag;
267 /* Remember to clear protected flag that was temporarily set. */
269 wh = mtod(mfrag, struct ieee80211_frame *);
270 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED;
276 ieee80211_deliver_data(struct ieee80211vap *vap,
277 struct ieee80211_node *ni, struct mbuf *m)
279 struct ether_header *eh = mtod(m, struct ether_header *);
280 struct ifnet *ifp = vap->iv_ifp;
282 /* clear driver/net80211 flags before passing up */
283 m->m_flags &= ~(M_MCAST | M_BCAST);
286 /* NB: see hostap_deliver_data, this path doesn't handle hostap */
287 KASSERT(vap->iv_opmode != IEEE80211_M_HOSTAP, ("gack, hostap"));
291 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
292 IEEE80211_NODE_STAT(ni, rx_data);
293 IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len);
294 if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
295 if (ETHER_IS_BROADCAST(eh->ether_dhost))
296 m->m_flags |= M_BCAST;
298 m->m_flags |= M_MCAST;
299 IEEE80211_NODE_STAT(ni, rx_mcast);
301 IEEE80211_NODE_STAT(ni, rx_ucast);
302 m->m_pkthdr.rcvif = ifp;
304 if (ni->ni_vlan != 0) {
305 /* attach vlan tag */
306 m->m_pkthdr.ether_vtag = ni->ni_vlan;
307 m->m_flags |= M_VLANTAG;
309 ifp->if_input(ifp, m);
313 ieee80211_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen,
316 struct ieee80211_qosframe_addr4 wh;
317 struct ether_header *eh;
320 KASSERT(hdrlen <= sizeof(wh),
321 ("hdrlen %d > max %zd", hdrlen, sizeof(wh)));
323 if (m->m_len < hdrlen + sizeof(*llc) &&
324 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
325 vap->iv_stats.is_rx_tooshort++;
329 memcpy(&wh, mtod(m, caddr_t), hdrlen);
330 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
331 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
332 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
333 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
334 /* NB: preserve AppleTalk frames that have a native SNAP hdr */
335 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
336 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX)) &&
337 /* Do not want to touch A-MSDU frames. */
338 !(qos & IEEE80211_QOS_AMSDU)) {
339 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
342 m_adj(m, hdrlen - sizeof(*eh));
344 eh = mtod(m, struct ether_header *);
345 switch (wh.i_fc[1] & IEEE80211_FC1_DIR_MASK) {
346 case IEEE80211_FC1_DIR_NODS:
347 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr1);
348 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr2);
350 case IEEE80211_FC1_DIR_TODS:
351 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr3);
352 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr2);
354 case IEEE80211_FC1_DIR_FROMDS:
355 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr1);
356 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr3);
358 case IEEE80211_FC1_DIR_DSTODS:
359 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr3);
360 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr4);
363 #ifndef __NO_STRICT_ALIGNMENT
364 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
365 m = ieee80211_realign(vap, m, sizeof(*eh));
369 #endif /* !__NO_STRICT_ALIGNMENT */
371 eh = mtod(m, struct ether_header *);
372 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
378 * Decap a frame encapsulated in a fast-frame/A-MSDU.
381 ieee80211_decap1(struct mbuf *m, int *framelen)
383 #define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc))
384 struct ether_header *eh;
386 const uint8_t llc_hdr_mac[ETHER_ADDR_LEN] = {
387 /* MAC address matching the 802.2 LLC header */
388 LLC_SNAP_LSAP, LLC_SNAP_LSAP, LLC_UI, 0, 0, 0
392 * The frame has an 802.3 header followed by an 802.2
393 * LLC header. The encapsulated frame length is in the
394 * first header type field; save that and overwrite it
395 * with the true type field found in the second. Then
396 * copy the 802.3 header up to where it belongs and
397 * adjust the mbuf contents to remove the void.
399 if (m->m_len < FF_LLC_SIZE && (m = m_pullup(m, FF_LLC_SIZE)) == NULL)
401 eh = mtod(m, struct ether_header *); /* 802.3 header is first */
404 * Detect possible attack where a single 802.11 frame is processed
405 * as an A-MSDU frame due to an adversary setting the A-MSDU present
406 * bit in the 802.11 QoS header. [FragAttacks]
408 if (memcmp(eh->ether_dhost, llc_hdr_mac, ETHER_ADDR_LEN) == 0)
411 llc = (struct llc *)&eh[1]; /* 802.2 header follows */
412 *framelen = ntohs(eh->ether_type) /* encap'd frame size */
413 + sizeof(struct ether_header) - sizeof(struct llc);
414 eh->ether_type = llc->llc_un.type_snap.ether_type;
415 ovbcopy(eh, mtod(m, uint8_t *) + sizeof(struct llc),
416 sizeof(struct ether_header));
417 m_adj(m, sizeof(struct llc));
423 * Install received rate set information in the node's state block.
426 ieee80211_setup_rates(struct ieee80211_node *ni,
427 const uint8_t *rates, const uint8_t *xrates, int flags)
429 struct ieee80211vap *vap = ni->ni_vap;
430 struct ieee80211_rateset *rs = &ni->ni_rates;
432 memset(rs, 0, sizeof(*rs));
433 rs->rs_nrates = rates[1];
434 memcpy(rs->rs_rates, rates + 2, rs->rs_nrates);
435 if (xrates != NULL) {
438 * Tack on 11g extended supported rate element.
441 if (rs->rs_nrates + nxrates > IEEE80211_RATE_MAXSIZE) {
442 nxrates = IEEE80211_RATE_MAXSIZE - rs->rs_nrates;
443 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE, ni,
444 "extended rate set too large; only using "
445 "%u of %u rates", nxrates, xrates[1]);
446 vap->iv_stats.is_rx_rstoobig++;
448 memcpy(rs->rs_rates + rs->rs_nrates, xrates+2, nxrates);
449 rs->rs_nrates += nxrates;
451 return ieee80211_fix_rate(ni, rs, flags);
455 * Send a management frame error response to the specified
456 * station. If ni is associated with the station then use
457 * it; otherwise allocate a temporary node suitable for
458 * transmitting the frame and then free the reference so
459 * it will go away as soon as the frame has been transmitted.
462 ieee80211_send_error(struct ieee80211_node *ni,
463 const uint8_t mac[IEEE80211_ADDR_LEN], int subtype, int arg)
465 struct ieee80211vap *vap = ni->ni_vap;
468 if (ni == vap->iv_bss) {
469 if (vap->iv_state != IEEE80211_S_RUN) {
471 * XXX hack until we get rid of this routine.
472 * We can be called prior to the vap reaching
473 * run state under certain conditions in which
474 * case iv_bss->ni_chan will not be setup.
475 * Check for this explicitly and and just ignore
480 ni = ieee80211_tmp_node(vap, mac);
488 IEEE80211_SEND_MGMT(ni, subtype, arg);
490 ieee80211_free_node(ni);
494 ieee80211_alloc_challenge(struct ieee80211_node *ni)
496 if (ni->ni_challenge == NULL)
497 ni->ni_challenge = (uint32_t *)
498 IEEE80211_MALLOC(IEEE80211_CHALLENGE_LEN,
499 M_80211_NODE, IEEE80211_M_NOWAIT);
500 if (ni->ni_challenge == NULL) {
501 IEEE80211_NOTE(ni->ni_vap,
502 IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni,
503 "%s", "shared key challenge alloc failed");
506 return (ni->ni_challenge != NULL);
510 * Parse a Beacon or ProbeResponse frame and return the
511 * useful information in an ieee80211_scanparams structure.
512 * Status is set to 0 if no problems were found; otherwise
513 * a bitmask of IEEE80211_BPARSE_* items is returned that
514 * describes the problems detected.
517 ieee80211_parse_beacon(struct ieee80211_node *ni, struct mbuf *m,
518 struct ieee80211_channel *rxchan, struct ieee80211_scanparams *scan)
520 struct ieee80211vap *vap = ni->ni_vap;
521 struct ieee80211com *ic = ni->ni_ic;
522 struct ieee80211_frame *wh;
525 wh = mtod(m, struct ieee80211_frame *);
526 frm = (uint8_t *)&wh[1];
527 efrm = mtod(m, uint8_t *) + m->m_len;
530 * beacon/probe response frame format
532 * XXX Update from 802.11-2012 - eg where HT is
534 * [2] beacon interval
535 * [2] capability information
537 * [tlv] supported rates
538 * [tlv] country information
539 * [tlv] channel switch announcement (CSA)
540 * [tlv] parameter set (FH/DS)
541 * [tlv] erp information
542 * [tlv] extended supported rates
545 * [tlv] HT capabilities
546 * [tlv] HT information
547 * [tlv] VHT capabilities
548 * [tlv] VHT information
549 * [tlv] Atheros capabilities
551 * [tlv] Mesh Configuration
553 IEEE80211_VERIFY_LENGTH(efrm - frm, 12,
554 return (scan->status = IEEE80211_BPARSE_BADIELEN));
555 memset(scan, 0, sizeof(*scan));
556 scan->tstamp = frm; frm += 8;
557 scan->bintval = le16toh(*(uint16_t *)frm); frm += 2;
558 scan->capinfo = le16toh(*(uint16_t *)frm); frm += 2;
559 scan->bchan = ieee80211_chan2ieee(ic, rxchan);
560 scan->chan = scan->bchan;
562 scan->ies_len = efrm - frm;
564 while (efrm - frm > 1) {
565 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2,
566 return (scan->status = IEEE80211_BPARSE_BADIELEN));
568 case IEEE80211_ELEMID_SSID:
571 case IEEE80211_ELEMID_RATES:
574 case IEEE80211_ELEMID_COUNTRY:
577 case IEEE80211_ELEMID_CSA:
580 case IEEE80211_ELEMID_QUIET:
583 case IEEE80211_ELEMID_FHPARMS:
584 if (ic->ic_phytype == IEEE80211_T_FH) {
585 scan->fhdwell = le16dec(&frm[2]);
586 scan->chan = IEEE80211_FH_CHAN(frm[4], frm[5]);
587 scan->fhindex = frm[6];
590 case IEEE80211_ELEMID_DSPARMS:
592 * XXX hack this since depending on phytype
593 * is problematic for multi-mode devices.
595 if (ic->ic_phytype != IEEE80211_T_FH)
598 case IEEE80211_ELEMID_TIM:
601 scan->timoff = frm - mtod(m, uint8_t *);
603 case IEEE80211_ELEMID_IBSSPARMS:
604 case IEEE80211_ELEMID_CFPARMS:
605 case IEEE80211_ELEMID_PWRCNSTR:
606 case IEEE80211_ELEMID_BSSLOAD:
607 case IEEE80211_ELEMID_APCHANREP:
608 /* NB: avoid debugging complaints */
610 case IEEE80211_ELEMID_XRATES:
613 case IEEE80211_ELEMID_ERP:
615 IEEE80211_DISCARD_IE(vap,
616 IEEE80211_MSG_ELEMID, wh, "ERP",
617 "bad len %u", frm[1]);
618 vap->iv_stats.is_rx_elem_toobig++;
621 scan->erp = frm[2] | 0x100;
623 case IEEE80211_ELEMID_HTCAP:
626 case IEEE80211_ELEMID_VHT_CAP:
629 case IEEE80211_ELEMID_VHT_OPMODE:
630 scan->vhtopmode = frm;
632 case IEEE80211_ELEMID_RSN:
635 case IEEE80211_ELEMID_HTINFO:
638 #ifdef IEEE80211_SUPPORT_MESH
639 case IEEE80211_ELEMID_MESHID:
642 case IEEE80211_ELEMID_MESHCONF:
643 scan->meshconf = frm;
646 /* Extended capabilities; nothing handles it for now */
647 case IEEE80211_ELEMID_EXTCAP:
649 case IEEE80211_ELEMID_VENDOR:
652 else if (iswmeparam(frm) || iswmeinfo(frm))
654 #ifdef IEEE80211_SUPPORT_SUPERG
655 else if (isatherosoui(frm))
658 #ifdef IEEE80211_SUPPORT_TDMA
659 else if (istdmaoui(frm))
662 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) {
664 * Accept pre-draft HT ie's if the
665 * standard ones have not been seen.
667 if (ishtcapoui(frm)) {
668 if (scan->htcap == NULL)
670 } else if (ishtinfooui(frm)) {
671 if (scan->htinfo == NULL)
677 IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID,
679 "id %u, len %u", *frm, frm[1]);
680 vap->iv_stats.is_rx_elem_unknown++;
685 IEEE80211_VERIFY_ELEMENT(scan->rates, IEEE80211_RATE_MAXSIZE,
686 scan->status |= IEEE80211_BPARSE_RATES_INVALID);
687 if (scan->rates != NULL && scan->xrates != NULL) {
689 * NB: don't process XRATES if RATES is missing. This
690 * avoids a potential null ptr deref and should be ok
691 * as the return code will already note RATES is missing
692 * (so callers shouldn't otherwise process the frame).
694 IEEE80211_VERIFY_ELEMENT(scan->xrates,
695 IEEE80211_RATE_MAXSIZE - scan->rates[1],
696 scan->status |= IEEE80211_BPARSE_XRATES_INVALID);
698 IEEE80211_VERIFY_ELEMENT(scan->ssid, IEEE80211_NWID_LEN,
699 scan->status |= IEEE80211_BPARSE_SSID_INVALID);
700 if (scan->chan != scan->bchan && ic->ic_phytype != IEEE80211_T_FH) {
702 * Frame was received on a channel different from the
703 * one indicated in the DS params element id;
704 * silently discard it.
706 * NB: this can happen due to signal leakage.
707 * But we should take it for FH phy because
708 * the rssi value should be correct even for
709 * different hop pattern in FH.
711 IEEE80211_DISCARD(vap,
712 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
713 wh, NULL, "for off-channel %u (bchan=%u)",
714 scan->chan, scan->bchan);
715 vap->iv_stats.is_rx_chanmismatch++;
716 scan->status |= IEEE80211_BPARSE_OFFCHAN;
718 if (!(IEEE80211_BINTVAL_MIN <= scan->bintval &&
719 scan->bintval <= IEEE80211_BINTVAL_MAX)) {
720 IEEE80211_DISCARD(vap,
721 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
722 wh, NULL, "bogus beacon interval (%d TU)",
723 (int) scan->bintval);
724 vap->iv_stats.is_rx_badbintval++;
725 scan->status |= IEEE80211_BPARSE_BINTVAL_INVALID;
727 if (scan->country != NULL) {
729 * Validate we have at least enough data to extract
730 * the country code. Not sure if we should return an
731 * error instead of discarding the IE; consider this
732 * being lenient as we don't depend on the data for
735 IEEE80211_VERIFY_LENGTH(scan->country[1], 3 * sizeof(uint8_t),
736 scan->country = NULL);
738 if (scan->csa != NULL) {
740 * Validate Channel Switch Announcement; this must
741 * be the correct length or we toss the frame.
743 IEEE80211_VERIFY_LENGTH(scan->csa[1], 3 * sizeof(uint8_t),
744 scan->status |= IEEE80211_BPARSE_CSA_INVALID);
746 #ifdef IEEE80211_SUPPORT_MESH
747 if (scan->meshid != NULL) {
748 IEEE80211_VERIFY_ELEMENT(scan->meshid, IEEE80211_MESHID_LEN,
749 scan->status |= IEEE80211_BPARSE_MESHID_INVALID);
753 * Process HT ie's. This is complicated by our
754 * accepting both the standard ie's and the pre-draft
755 * vendor OUI ie's that some vendors still use/require.
757 if (scan->htcap != NULL) {
758 IEEE80211_VERIFY_LENGTH(scan->htcap[1],
759 scan->htcap[0] == IEEE80211_ELEMID_VENDOR ?
760 4 + sizeof(struct ieee80211_ie_htcap)-2 :
761 sizeof(struct ieee80211_ie_htcap)-2,
764 if (scan->htinfo != NULL) {
765 IEEE80211_VERIFY_LENGTH(scan->htinfo[1],
766 scan->htinfo[0] == IEEE80211_ELEMID_VENDOR ?
767 4 + sizeof(struct ieee80211_ie_htinfo)-2 :
768 sizeof(struct ieee80211_ie_htinfo)-2,
769 scan->htinfo = NULL);
772 /* Process VHT IEs */
773 if (scan->vhtcap != NULL) {
774 IEEE80211_VERIFY_LENGTH(scan->vhtcap[1],
775 sizeof(struct ieee80211_ie_vhtcap) - 2,
776 scan->vhtcap = NULL);
778 if (scan->vhtopmode != NULL) {
779 IEEE80211_VERIFY_LENGTH(scan->vhtopmode[1],
780 sizeof(struct ieee80211_ie_vht_operation) - 2,
781 scan->vhtopmode = NULL);
788 * Parse an Action frame. Return 0 on success, non-zero on failure.
791 ieee80211_parse_action(struct ieee80211_node *ni, struct mbuf *m)
793 struct ieee80211vap *vap = ni->ni_vap;
794 const struct ieee80211_action *ia;
795 struct ieee80211_frame *wh;
799 * action frame format:
804 wh = mtod(m, struct ieee80211_frame *);
805 frm = (u_int8_t *)&wh[1];
806 efrm = mtod(m, u_int8_t *) + m->m_len;
807 IEEE80211_VERIFY_LENGTH(efrm - frm,
808 sizeof(struct ieee80211_action), return EINVAL);
809 ia = (const struct ieee80211_action *) frm;
811 vap->iv_stats.is_rx_action++;
812 IEEE80211_NODE_STAT(ni, rx_action);
814 /* verify frame payloads but defer processing */
815 switch (ia->ia_category) {
816 case IEEE80211_ACTION_CAT_BA:
817 switch (ia->ia_action) {
818 case IEEE80211_ACTION_BA_ADDBA_REQUEST:
819 IEEE80211_VERIFY_LENGTH(efrm - frm,
820 sizeof(struct ieee80211_action_ba_addbarequest),
823 case IEEE80211_ACTION_BA_ADDBA_RESPONSE:
824 IEEE80211_VERIFY_LENGTH(efrm - frm,
825 sizeof(struct ieee80211_action_ba_addbaresponse),
828 case IEEE80211_ACTION_BA_DELBA:
829 IEEE80211_VERIFY_LENGTH(efrm - frm,
830 sizeof(struct ieee80211_action_ba_delba),
835 case IEEE80211_ACTION_CAT_HT:
836 switch (ia->ia_action) {
837 case IEEE80211_ACTION_HT_TXCHWIDTH:
838 IEEE80211_VERIFY_LENGTH(efrm - frm,
839 sizeof(struct ieee80211_action_ht_txchwidth),
842 case IEEE80211_ACTION_HT_MIMOPWRSAVE:
843 IEEE80211_VERIFY_LENGTH(efrm - frm,
844 sizeof(struct ieee80211_action_ht_mimopowersave),
849 #ifdef IEEE80211_SUPPORT_MESH
850 case IEEE80211_ACTION_CAT_MESH:
851 switch (ia->ia_action) {
852 case IEEE80211_ACTION_MESH_LMETRIC:
854 * XXX: verification is true only if we are using
855 * Airtime link metric (default)
857 IEEE80211_VERIFY_LENGTH(efrm - frm,
858 sizeof(struct ieee80211_meshlmetric_ie),
861 case IEEE80211_ACTION_MESH_HWMP:
862 /* verify something */
864 case IEEE80211_ACTION_MESH_GANN:
865 IEEE80211_VERIFY_LENGTH(efrm - frm,
866 sizeof(struct ieee80211_meshgann_ie),
869 case IEEE80211_ACTION_MESH_CC:
870 case IEEE80211_ACTION_MESH_MCCA_SREQ:
871 case IEEE80211_ACTION_MESH_MCCA_SREP:
872 case IEEE80211_ACTION_MESH_MCCA_AREQ:
873 case IEEE80211_ACTION_MESH_MCCA_ADVER:
874 case IEEE80211_ACTION_MESH_MCCA_TRDOWN:
875 case IEEE80211_ACTION_MESH_TBTT_REQ:
876 case IEEE80211_ACTION_MESH_TBTT_RES:
877 /* reject these early on, not implemented */
878 IEEE80211_DISCARD(vap,
879 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
880 wh, NULL, "not implemented yet, act=0x%02X",
885 case IEEE80211_ACTION_CAT_SELF_PROT:
886 /* If TA or RA group address discard silently */
887 if (IEEE80211_IS_MULTICAST(wh->i_addr1) ||
888 IEEE80211_IS_MULTICAST(wh->i_addr2))
891 * XXX: Should we verify complete length now or it is
892 * to varying in sizes?
894 switch (ia->ia_action) {
895 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
896 case IEEE80211_ACTION_MESHPEERING_CLOSE:
897 /* is not a peering candidate (yet) */
898 if (ni == vap->iv_bss)
904 case IEEE80211_ACTION_CAT_VHT:
905 printf("%s: TODO: VHT handling!\n", __func__);
911 #ifdef IEEE80211_DEBUG
916 ieee80211_ssid_mismatch(struct ieee80211vap *vap, const char *tag,
917 uint8_t mac[IEEE80211_ADDR_LEN], uint8_t *ssid)
919 printf("[%s] discard %s frame, ssid mismatch: ",
920 ether_sprintf(mac), tag);
921 ieee80211_print_essid(ssid + 2, ssid[1]);
926 * Return the bssid of a frame.
928 static const uint8_t *
929 ieee80211_getbssid(const struct ieee80211vap *vap,
930 const struct ieee80211_frame *wh)
932 if (vap->iv_opmode == IEEE80211_M_STA)
934 if ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) != IEEE80211_FC1_DIR_NODS)
936 if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL)
941 #include <machine/stdarg.h>
944 ieee80211_note(const struct ieee80211vap *vap, const char *fmt, ...)
946 char buf[256]; /* XXX */
951 len = vsnprintf(buf, sizeof(buf), fmt, ap);
954 if_printf(vap->iv_ifp, "%s", buf); /* NB: no \n */
956 if (len >= sizeof(buf))
957 printf("%s: XXX buffer too small: len = %d\n", __func__, len);
961 ieee80211_note_frame(const struct ieee80211vap *vap,
962 const struct ieee80211_frame *wh,
963 const char *fmt, ...)
965 char buf[256]; /* XXX */
970 len = vsnprintf(buf, sizeof(buf), fmt, ap);
972 if_printf(vap->iv_ifp, "[%s] %s\n",
973 ether_sprintf(ieee80211_getbssid(vap, wh)), buf);
975 if (len >= sizeof(buf))
976 printf("%s: XXX buffer too small: len = %d\n", __func__, len);
980 ieee80211_note_mac(const struct ieee80211vap *vap,
981 const uint8_t mac[IEEE80211_ADDR_LEN],
982 const char *fmt, ...)
984 char buf[256]; /* XXX */
989 len = vsnprintf(buf, sizeof(buf), fmt, ap);
991 if_printf(vap->iv_ifp, "[%s] %s\n", ether_sprintf(mac), buf);
993 if (len >= sizeof(buf))
994 printf("%s: XXX buffer too small: len = %d\n", __func__, len);
998 ieee80211_discard_frame(const struct ieee80211vap *vap,
999 const struct ieee80211_frame *wh,
1000 const char *type, const char *fmt, ...)
1002 char buf[256]; /* XXX */
1007 len = vsnprintf(buf, sizeof(buf), fmt, ap);
1010 if_printf(vap->iv_ifp, "[%s] discard %s frame, %s\n",
1011 ether_sprintf(ieee80211_getbssid(vap, wh)),
1012 type != NULL ? type : ieee80211_mgt_subtype_name(wh->i_fc[0]),
1015 if (len >= sizeof(buf))
1016 printf("%s: XXX buffer too small: len = %d\n", __func__, len);
1020 ieee80211_discard_ie(const struct ieee80211vap *vap,
1021 const struct ieee80211_frame *wh,
1022 const char *type, const char *fmt, ...)
1024 char buf[256]; /* XXX */
1029 len = vsnprintf(buf, sizeof(buf), fmt, ap);
1032 if_printf(vap->iv_ifp, "[%s] discard%s%s information element, %s\n",
1033 ether_sprintf(ieee80211_getbssid(vap, wh)),
1034 type != NULL ? " " : "", type != NULL ? type : "", buf);
1036 if (len >= sizeof(buf))
1037 printf("%s: XXX buffer too small: len = %d\n", __func__, len);
1041 ieee80211_discard_mac(const struct ieee80211vap *vap,
1042 const uint8_t mac[IEEE80211_ADDR_LEN],
1043 const char *type, const char *fmt, ...)
1045 char buf[256]; /* XXX */
1050 len = vsnprintf(buf, sizeof(buf), fmt, ap);
1053 if_printf(vap->iv_ifp, "[%s] discard%s%s frame, %s\n",
1055 type != NULL ? " " : "", type != NULL ? type : "", buf);
1057 if (len >= sizeof(buf))
1058 printf("%s: XXX buffer too small: len = %d\n", __func__, len);
1060 #endif /* IEEE80211_DEBUG */