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, 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)
314 struct ieee80211_qosframe_addr4 wh;
315 struct ether_header *eh;
318 KASSERT(hdrlen <= sizeof(wh),
319 ("hdrlen %d > max %zd", hdrlen, sizeof(wh)));
321 if (m->m_len < hdrlen + sizeof(*llc) &&
322 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
323 vap->iv_stats.is_rx_tooshort++;
327 memcpy(&wh, mtod(m, caddr_t), hdrlen);
328 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
329 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
330 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
331 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
332 /* NB: preserve AppleTalk frames that have a native SNAP hdr */
333 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
334 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
335 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
338 m_adj(m, hdrlen - sizeof(*eh));
340 eh = mtod(m, struct ether_header *);
341 switch (wh.i_fc[1] & IEEE80211_FC1_DIR_MASK) {
342 case IEEE80211_FC1_DIR_NODS:
343 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr1);
344 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr2);
346 case IEEE80211_FC1_DIR_TODS:
347 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr3);
348 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr2);
350 case IEEE80211_FC1_DIR_FROMDS:
351 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr1);
352 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr3);
354 case IEEE80211_FC1_DIR_DSTODS:
355 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr3);
356 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr4);
359 #ifndef __NO_STRICT_ALIGNMENT
360 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
361 m = ieee80211_realign(vap, m, sizeof(*eh));
365 #endif /* !__NO_STRICT_ALIGNMENT */
367 eh = mtod(m, struct ether_header *);
368 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
374 * Decap a frame encapsulated in a fast-frame/A-MSDU.
377 ieee80211_decap1(struct mbuf *m, int *framelen)
379 #define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc))
380 struct ether_header *eh;
384 * The frame has an 802.3 header followed by an 802.2
385 * LLC header. The encapsulated frame length is in the
386 * first header type field; save that and overwrite it
387 * with the true type field found in the second. Then
388 * copy the 802.3 header up to where it belongs and
389 * adjust the mbuf contents to remove the void.
391 if (m->m_len < FF_LLC_SIZE && (m = m_pullup(m, FF_LLC_SIZE)) == NULL)
393 eh = mtod(m, struct ether_header *); /* 802.3 header is first */
394 llc = (struct llc *)&eh[1]; /* 802.2 header follows */
395 *framelen = ntohs(eh->ether_type) /* encap'd frame size */
396 + sizeof(struct ether_header) - sizeof(struct llc);
397 eh->ether_type = llc->llc_un.type_snap.ether_type;
398 ovbcopy(eh, mtod(m, uint8_t *) + sizeof(struct llc),
399 sizeof(struct ether_header));
400 m_adj(m, sizeof(struct llc));
406 * Install received rate set information in the node's state block.
409 ieee80211_setup_rates(struct ieee80211_node *ni,
410 const uint8_t *rates, const uint8_t *xrates, int flags)
412 struct ieee80211vap *vap = ni->ni_vap;
413 struct ieee80211_rateset *rs = &ni->ni_rates;
415 memset(rs, 0, sizeof(*rs));
416 rs->rs_nrates = rates[1];
417 memcpy(rs->rs_rates, rates + 2, rs->rs_nrates);
418 if (xrates != NULL) {
421 * Tack on 11g extended supported rate element.
424 if (rs->rs_nrates + nxrates > IEEE80211_RATE_MAXSIZE) {
425 nxrates = IEEE80211_RATE_MAXSIZE - rs->rs_nrates;
426 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE, ni,
427 "extended rate set too large; only using "
428 "%u of %u rates", nxrates, xrates[1]);
429 vap->iv_stats.is_rx_rstoobig++;
431 memcpy(rs->rs_rates + rs->rs_nrates, xrates+2, nxrates);
432 rs->rs_nrates += nxrates;
434 return ieee80211_fix_rate(ni, rs, flags);
438 * Send a management frame error response to the specified
439 * station. If ni is associated with the station then use
440 * it; otherwise allocate a temporary node suitable for
441 * transmitting the frame and then free the reference so
442 * it will go away as soon as the frame has been transmitted.
445 ieee80211_send_error(struct ieee80211_node *ni,
446 const uint8_t mac[IEEE80211_ADDR_LEN], int subtype, int arg)
448 struct ieee80211vap *vap = ni->ni_vap;
451 if (ni == vap->iv_bss) {
452 if (vap->iv_state != IEEE80211_S_RUN) {
454 * XXX hack until we get rid of this routine.
455 * We can be called prior to the vap reaching
456 * run state under certain conditions in which
457 * case iv_bss->ni_chan will not be setup.
458 * Check for this explicitly and and just ignore
463 ni = ieee80211_tmp_node(vap, mac);
471 IEEE80211_SEND_MGMT(ni, subtype, arg);
473 ieee80211_free_node(ni);
477 ieee80211_alloc_challenge(struct ieee80211_node *ni)
479 if (ni->ni_challenge == NULL)
480 ni->ni_challenge = (uint32_t *)
481 IEEE80211_MALLOC(IEEE80211_CHALLENGE_LEN,
482 M_80211_NODE, IEEE80211_M_NOWAIT);
483 if (ni->ni_challenge == NULL) {
484 IEEE80211_NOTE(ni->ni_vap,
485 IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni,
486 "%s", "shared key challenge alloc failed");
489 return (ni->ni_challenge != NULL);
493 * Parse a Beacon or ProbeResponse frame and return the
494 * useful information in an ieee80211_scanparams structure.
495 * Status is set to 0 if no problems were found; otherwise
496 * a bitmask of IEEE80211_BPARSE_* items is returned that
497 * describes the problems detected.
500 ieee80211_parse_beacon(struct ieee80211_node *ni, struct mbuf *m,
501 struct ieee80211_channel *rxchan, struct ieee80211_scanparams *scan)
503 struct ieee80211vap *vap = ni->ni_vap;
504 struct ieee80211com *ic = ni->ni_ic;
505 struct ieee80211_frame *wh;
508 wh = mtod(m, struct ieee80211_frame *);
509 frm = (uint8_t *)&wh[1];
510 efrm = mtod(m, uint8_t *) + m->m_len;
513 * beacon/probe response frame format
515 * XXX Update from 802.11-2012 - eg where HT is
517 * [2] beacon interval
518 * [2] capability information
520 * [tlv] supported rates
521 * [tlv] country information
522 * [tlv] channel switch announcement (CSA)
523 * [tlv] parameter set (FH/DS)
524 * [tlv] erp information
525 * [tlv] extended supported rates
528 * [tlv] HT capabilities
529 * [tlv] HT information
530 * [tlv] VHT capabilities
531 * [tlv] VHT information
532 * [tlv] Atheros capabilities
534 * [tlv] Mesh Configuration
536 IEEE80211_VERIFY_LENGTH(efrm - frm, 12,
537 return (scan->status = IEEE80211_BPARSE_BADIELEN));
538 memset(scan, 0, sizeof(*scan));
539 scan->tstamp = frm; frm += 8;
540 scan->bintval = le16toh(*(uint16_t *)frm); frm += 2;
541 scan->capinfo = le16toh(*(uint16_t *)frm); frm += 2;
542 scan->bchan = ieee80211_chan2ieee(ic, rxchan);
543 scan->chan = scan->bchan;
545 scan->ies_len = efrm - frm;
547 while (efrm - frm > 1) {
548 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2,
549 return (scan->status = IEEE80211_BPARSE_BADIELEN));
551 case IEEE80211_ELEMID_SSID:
554 case IEEE80211_ELEMID_RATES:
557 case IEEE80211_ELEMID_COUNTRY:
560 case IEEE80211_ELEMID_CSA:
563 case IEEE80211_ELEMID_QUIET:
566 case IEEE80211_ELEMID_FHPARMS:
567 if (ic->ic_phytype == IEEE80211_T_FH) {
568 scan->fhdwell = le16dec(&frm[2]);
569 scan->chan = IEEE80211_FH_CHAN(frm[4], frm[5]);
570 scan->fhindex = frm[6];
573 case IEEE80211_ELEMID_DSPARMS:
575 * XXX hack this since depending on phytype
576 * is problematic for multi-mode devices.
578 if (ic->ic_phytype != IEEE80211_T_FH)
581 case IEEE80211_ELEMID_TIM:
584 scan->timoff = frm - mtod(m, uint8_t *);
586 case IEEE80211_ELEMID_IBSSPARMS:
587 case IEEE80211_ELEMID_CFPARMS:
588 case IEEE80211_ELEMID_PWRCNSTR:
589 case IEEE80211_ELEMID_BSSLOAD:
590 case IEEE80211_ELEMID_APCHANREP:
591 /* NB: avoid debugging complaints */
593 case IEEE80211_ELEMID_XRATES:
596 case IEEE80211_ELEMID_ERP:
598 IEEE80211_DISCARD_IE(vap,
599 IEEE80211_MSG_ELEMID, wh, "ERP",
600 "bad len %u", frm[1]);
601 vap->iv_stats.is_rx_elem_toobig++;
604 scan->erp = frm[2] | 0x100;
606 case IEEE80211_ELEMID_HTCAP:
609 case IEEE80211_ELEMID_VHT_CAP:
612 case IEEE80211_ELEMID_VHT_OPMODE:
613 scan->vhtopmode = frm;
615 case IEEE80211_ELEMID_RSN:
618 case IEEE80211_ELEMID_HTINFO:
621 #ifdef IEEE80211_SUPPORT_MESH
622 case IEEE80211_ELEMID_MESHID:
625 case IEEE80211_ELEMID_MESHCONF:
626 scan->meshconf = frm;
629 /* Extended capabilities; nothing handles it for now */
630 case IEEE80211_ELEMID_EXTCAP:
632 case IEEE80211_ELEMID_VENDOR:
635 else if (iswmeparam(frm) || iswmeinfo(frm))
637 #ifdef IEEE80211_SUPPORT_SUPERG
638 else if (isatherosoui(frm))
641 #ifdef IEEE80211_SUPPORT_TDMA
642 else if (istdmaoui(frm))
645 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) {
647 * Accept pre-draft HT ie's if the
648 * standard ones have not been seen.
650 if (ishtcapoui(frm)) {
651 if (scan->htcap == NULL)
653 } else if (ishtinfooui(frm)) {
654 if (scan->htinfo == NULL)
660 IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID,
662 "id %u, len %u", *frm, frm[1]);
663 vap->iv_stats.is_rx_elem_unknown++;
668 IEEE80211_VERIFY_ELEMENT(scan->rates, IEEE80211_RATE_MAXSIZE,
669 scan->status |= IEEE80211_BPARSE_RATES_INVALID);
670 if (scan->rates != NULL && scan->xrates != NULL) {
672 * NB: don't process XRATES if RATES is missing. This
673 * avoids a potential null ptr deref and should be ok
674 * as the return code will already note RATES is missing
675 * (so callers shouldn't otherwise process the frame).
677 IEEE80211_VERIFY_ELEMENT(scan->xrates,
678 IEEE80211_RATE_MAXSIZE - scan->rates[1],
679 scan->status |= IEEE80211_BPARSE_XRATES_INVALID);
681 IEEE80211_VERIFY_ELEMENT(scan->ssid, IEEE80211_NWID_LEN,
682 scan->status |= IEEE80211_BPARSE_SSID_INVALID);
683 if (scan->chan != scan->bchan && ic->ic_phytype != IEEE80211_T_FH) {
685 * Frame was received on a channel different from the
686 * one indicated in the DS params element id;
687 * silently discard it.
689 * NB: this can happen due to signal leakage.
690 * But we should take it for FH phy because
691 * the rssi value should be correct even for
692 * different hop pattern in FH.
694 IEEE80211_DISCARD(vap,
695 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
696 wh, NULL, "for off-channel %u (bchan=%u)",
697 scan->chan, scan->bchan);
698 vap->iv_stats.is_rx_chanmismatch++;
699 scan->status |= IEEE80211_BPARSE_OFFCHAN;
701 if (!(IEEE80211_BINTVAL_MIN <= scan->bintval &&
702 scan->bintval <= IEEE80211_BINTVAL_MAX)) {
703 IEEE80211_DISCARD(vap,
704 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
705 wh, NULL, "bogus beacon interval (%d TU)",
706 (int) scan->bintval);
707 vap->iv_stats.is_rx_badbintval++;
708 scan->status |= IEEE80211_BPARSE_BINTVAL_INVALID;
710 if (scan->country != NULL) {
712 * Validate we have at least enough data to extract
713 * the country code. Not sure if we should return an
714 * error instead of discarding the IE; consider this
715 * being lenient as we don't depend on the data for
718 IEEE80211_VERIFY_LENGTH(scan->country[1], 3 * sizeof(uint8_t),
719 scan->country = NULL);
721 if (scan->csa != NULL) {
723 * Validate Channel Switch Announcement; this must
724 * be the correct length or we toss the frame.
726 IEEE80211_VERIFY_LENGTH(scan->csa[1], 3 * sizeof(uint8_t),
727 scan->status |= IEEE80211_BPARSE_CSA_INVALID);
730 * Process HT ie's. This is complicated by our
731 * accepting both the standard ie's and the pre-draft
732 * vendor OUI ie's that some vendors still use/require.
734 if (scan->htcap != NULL) {
735 IEEE80211_VERIFY_LENGTH(scan->htcap[1],
736 scan->htcap[0] == IEEE80211_ELEMID_VENDOR ?
737 4 + sizeof(struct ieee80211_ie_htcap)-2 :
738 sizeof(struct ieee80211_ie_htcap)-2,
741 if (scan->htinfo != NULL) {
742 IEEE80211_VERIFY_LENGTH(scan->htinfo[1],
743 scan->htinfo[0] == IEEE80211_ELEMID_VENDOR ?
744 4 + sizeof(struct ieee80211_ie_htinfo)-2 :
745 sizeof(struct ieee80211_ie_htinfo)-2,
746 scan->htinfo = NULL);
749 /* Process VHT IEs */
750 if (scan->vhtcap != NULL) {
751 IEEE80211_VERIFY_LENGTH(scan->vhtcap[1],
752 sizeof(struct ieee80211_ie_vhtcap) - 2,
753 scan->vhtcap = NULL);
755 if (scan->vhtopmode != NULL) {
756 IEEE80211_VERIFY_LENGTH(scan->vhtopmode[1],
757 sizeof(struct ieee80211_ie_vht_operation) - 2,
758 scan->vhtopmode = NULL);
765 * Parse an Action frame. Return 0 on success, non-zero on failure.
768 ieee80211_parse_action(struct ieee80211_node *ni, struct mbuf *m)
770 struct ieee80211vap *vap = ni->ni_vap;
771 const struct ieee80211_action *ia;
772 struct ieee80211_frame *wh;
776 * action frame format:
781 wh = mtod(m, struct ieee80211_frame *);
782 frm = (u_int8_t *)&wh[1];
783 efrm = mtod(m, u_int8_t *) + m->m_len;
784 IEEE80211_VERIFY_LENGTH(efrm - frm,
785 sizeof(struct ieee80211_action), return EINVAL);
786 ia = (const struct ieee80211_action *) frm;
788 vap->iv_stats.is_rx_action++;
789 IEEE80211_NODE_STAT(ni, rx_action);
791 /* verify frame payloads but defer processing */
792 switch (ia->ia_category) {
793 case IEEE80211_ACTION_CAT_BA:
794 switch (ia->ia_action) {
795 case IEEE80211_ACTION_BA_ADDBA_REQUEST:
796 IEEE80211_VERIFY_LENGTH(efrm - frm,
797 sizeof(struct ieee80211_action_ba_addbarequest),
800 case IEEE80211_ACTION_BA_ADDBA_RESPONSE:
801 IEEE80211_VERIFY_LENGTH(efrm - frm,
802 sizeof(struct ieee80211_action_ba_addbaresponse),
805 case IEEE80211_ACTION_BA_DELBA:
806 IEEE80211_VERIFY_LENGTH(efrm - frm,
807 sizeof(struct ieee80211_action_ba_delba),
812 case IEEE80211_ACTION_CAT_HT:
813 switch (ia->ia_action) {
814 case IEEE80211_ACTION_HT_TXCHWIDTH:
815 IEEE80211_VERIFY_LENGTH(efrm - frm,
816 sizeof(struct ieee80211_action_ht_txchwidth),
819 case IEEE80211_ACTION_HT_MIMOPWRSAVE:
820 IEEE80211_VERIFY_LENGTH(efrm - frm,
821 sizeof(struct ieee80211_action_ht_mimopowersave),
826 #ifdef IEEE80211_SUPPORT_MESH
827 case IEEE80211_ACTION_CAT_MESH:
828 switch (ia->ia_action) {
829 case IEEE80211_ACTION_MESH_LMETRIC:
831 * XXX: verification is true only if we are using
832 * Airtime link metric (default)
834 IEEE80211_VERIFY_LENGTH(efrm - frm,
835 sizeof(struct ieee80211_meshlmetric_ie),
838 case IEEE80211_ACTION_MESH_HWMP:
839 /* verify something */
841 case IEEE80211_ACTION_MESH_GANN:
842 IEEE80211_VERIFY_LENGTH(efrm - frm,
843 sizeof(struct ieee80211_meshgann_ie),
846 case IEEE80211_ACTION_MESH_CC:
847 case IEEE80211_ACTION_MESH_MCCA_SREQ:
848 case IEEE80211_ACTION_MESH_MCCA_SREP:
849 case IEEE80211_ACTION_MESH_MCCA_AREQ:
850 case IEEE80211_ACTION_MESH_MCCA_ADVER:
851 case IEEE80211_ACTION_MESH_MCCA_TRDOWN:
852 case IEEE80211_ACTION_MESH_TBTT_REQ:
853 case IEEE80211_ACTION_MESH_TBTT_RES:
854 /* reject these early on, not implemented */
855 IEEE80211_DISCARD(vap,
856 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
857 wh, NULL, "not implemented yet, act=0x%02X",
862 case IEEE80211_ACTION_CAT_SELF_PROT:
863 /* If TA or RA group address discard silently */
864 if (IEEE80211_IS_MULTICAST(wh->i_addr1) ||
865 IEEE80211_IS_MULTICAST(wh->i_addr2))
868 * XXX: Should we verify complete length now or it is
869 * to varying in sizes?
871 switch (ia->ia_action) {
872 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
873 case IEEE80211_ACTION_MESHPEERING_CLOSE:
874 /* is not a peering candidate (yet) */
875 if (ni == vap->iv_bss)
881 case IEEE80211_ACTION_CAT_VHT:
882 printf("%s: TODO: VHT handling!\n", __func__);
888 #ifdef IEEE80211_DEBUG
893 ieee80211_ssid_mismatch(struct ieee80211vap *vap, const char *tag,
894 uint8_t mac[IEEE80211_ADDR_LEN], uint8_t *ssid)
896 printf("[%s] discard %s frame, ssid mismatch: ",
897 ether_sprintf(mac), tag);
898 ieee80211_print_essid(ssid + 2, ssid[1]);
903 * Return the bssid of a frame.
905 static const uint8_t *
906 ieee80211_getbssid(const struct ieee80211vap *vap,
907 const struct ieee80211_frame *wh)
909 if (vap->iv_opmode == IEEE80211_M_STA)
911 if ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) != IEEE80211_FC1_DIR_NODS)
913 if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL)
918 #include <machine/stdarg.h>
921 ieee80211_note(const struct ieee80211vap *vap, const char *fmt, ...)
923 char buf[128]; /* XXX */
927 vsnprintf(buf, sizeof(buf), fmt, ap);
930 if_printf(vap->iv_ifp, "%s", buf); /* NB: no \n */
934 ieee80211_note_frame(const struct ieee80211vap *vap,
935 const struct ieee80211_frame *wh,
936 const char *fmt, ...)
938 char buf[128]; /* XXX */
942 vsnprintf(buf, sizeof(buf), fmt, ap);
944 if_printf(vap->iv_ifp, "[%s] %s\n",
945 ether_sprintf(ieee80211_getbssid(vap, wh)), buf);
949 ieee80211_note_mac(const struct ieee80211vap *vap,
950 const uint8_t mac[IEEE80211_ADDR_LEN],
951 const char *fmt, ...)
953 char buf[128]; /* XXX */
957 vsnprintf(buf, sizeof(buf), fmt, ap);
959 if_printf(vap->iv_ifp, "[%s] %s\n", ether_sprintf(mac), buf);
963 ieee80211_discard_frame(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)));
971 printf("%s frame, ", type != NULL ? type :
972 ieee80211_mgt_subtype_name(wh->i_fc[0]));
980 ieee80211_discard_ie(const struct ieee80211vap *vap,
981 const struct ieee80211_frame *wh,
982 const char *type, const char *fmt, ...)
986 if_printf(vap->iv_ifp, "[%s] discard ",
987 ether_sprintf(ieee80211_getbssid(vap, wh)));
989 printf("%s information element, ", type);
991 printf("information element, ");
999 ieee80211_discard_mac(const struct ieee80211vap *vap,
1000 const uint8_t mac[IEEE80211_ADDR_LEN],
1001 const char *type, const char *fmt, ...)
1005 if_printf(vap->iv_ifp, "[%s] discard ", ether_sprintf(mac));
1007 printf("%s frame, ", type);
1015 #endif /* IEEE80211_DEBUG */