2 * Copyright (c) 2001 Atsushi Onoe
3 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
35 #include <sys/malloc.h>
36 #include <sys/endian.h>
37 #include <sys/kernel.h>
39 #include <sys/socket.h>
41 #include <net/ethernet.h>
43 #include <net/if_var.h>
44 #include <net/if_llc.h>
45 #include <net/if_media.h>
46 #include <net/if_vlan_var.h>
48 #include <net80211/ieee80211_var.h>
49 #include <net80211/ieee80211_input.h>
50 #ifdef IEEE80211_SUPPORT_MESH
51 #include <net80211/ieee80211_mesh.h>
57 #include <netinet/in.h>
58 #include <net/ethernet.h>
62 ieee80211_process_mimo(struct ieee80211_node *ni, struct ieee80211_rx_stats *rx)
66 /* Verify the required MIMO bits are set */
67 if ((rx->r_flags & (IEEE80211_R_C_CHAIN | IEEE80211_R_C_NF | IEEE80211_R_C_RSSI)) !=
68 (IEEE80211_R_C_CHAIN | IEEE80211_R_C_NF | IEEE80211_R_C_RSSI))
71 /* XXX This assumes the MIMO radios have both ctl and ext chains */
72 for (i = 0; i < MIN(rx->c_chain, IEEE80211_MAX_CHAINS); i++) {
73 IEEE80211_RSSI_LPF(ni->ni_mimo_rssi_ctl[i], rx->c_rssi_ctl[i]);
74 IEEE80211_RSSI_LPF(ni->ni_mimo_rssi_ext[i], rx->c_rssi_ext[i]);
77 /* XXX This also assumes the MIMO radios have both ctl and ext chains */
78 for(i = 0; i < MIN(rx->c_chain, IEEE80211_MAX_CHAINS); i++) {
79 ni->ni_mimo_noise_ctl[i] = rx->c_nf_ctl[i];
80 ni->ni_mimo_noise_ext[i] = rx->c_nf_ext[i];
82 ni->ni_mimo_chains = rx->c_chain;
86 ieee80211_input_mimo(struct ieee80211_node *ni, struct mbuf *m,
87 struct ieee80211_rx_stats *rx)
89 struct ieee80211_rx_stats rxs;
92 memcpy(&rxs, rx, sizeof(*rx));
94 /* try to read from mbuf */
95 bzero(&rxs, sizeof(rxs));
96 ieee80211_get_rx_params(m, &rxs);
99 /* XXX should assert IEEE80211_R_NF and IEEE80211_R_RSSI are set */
100 ieee80211_process_mimo(ni, &rxs);
102 //return ieee80211_input(ni, m, rx->rssi, rx->nf);
103 return ni->ni_vap->iv_input(ni, m, &rxs, rxs.rssi, rxs.nf);
107 ieee80211_input_all(struct ieee80211com *ic, struct mbuf *m, int rssi, int nf)
109 struct ieee80211_rx_stats rx;
111 rx.r_flags = IEEE80211_R_NF | IEEE80211_R_RSSI;
114 return ieee80211_input_mimo_all(ic, m, &rx);
118 ieee80211_input_mimo_all(struct ieee80211com *ic, struct mbuf *m,
119 struct ieee80211_rx_stats *rx)
121 struct ieee80211_rx_stats rxs;
122 struct ieee80211vap *vap;
125 m->m_flags |= M_BCAST; /* NB: mark for bpf tap'ing */
128 memcpy(&rxs, rx, sizeof(*rx));
130 /* try to read from mbuf */
131 bzero(&rxs, sizeof(rxs));
132 ieee80211_get_rx_params(m, &rxs);
136 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
137 struct ieee80211_node *ni;
140 /* NB: could check for IFF_UP but this is cheaper */
141 if (vap->iv_state == IEEE80211_S_INIT)
144 * WDS vap's only receive directed traffic from the
145 * station at the ``far end''. That traffic should
146 * be passed through the AP vap the station is associated
147 * to--so don't spam them with mcast frames.
149 if (vap->iv_opmode == IEEE80211_M_WDS)
151 if (TAILQ_NEXT(vap, iv_next) != NULL) {
153 * Packet contents are changed by ieee80211_decap
154 * so do a deep copy of the packet.
156 mcopy = m_dup(m, M_NOWAIT);
165 ni = ieee80211_ref_node(vap->iv_bss);
166 type = ieee80211_input_mimo(ni, mcopy, &rxs);
167 ieee80211_free_node(ni);
169 if (m != NULL) /* no vaps, reclaim mbuf */
175 * This function reassembles fragments.
177 * XXX should handle 3 concurrent reassemblies per-spec.
180 ieee80211_defrag(struct ieee80211_node *ni, struct mbuf *m, int hdrspace)
182 struct ieee80211vap *vap = ni->ni_vap;
183 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
184 struct ieee80211_frame *lwh;
187 uint8_t more_frag = wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG;
190 KASSERT(!IEEE80211_IS_MULTICAST(wh->i_addr1), ("multicast fragm?"));
192 rxseq = le16toh(*(uint16_t *)wh->i_seq);
193 fragno = rxseq & IEEE80211_SEQ_FRAG_MASK;
195 /* Quick way out, if there's nothing to defragment */
196 if (!more_frag && fragno == 0 && ni->ni_rxfrag[0] == NULL)
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);
229 /* NB: check seq # and frag together */
230 if (rxseq != last_rxseq+1 ||
231 !IEEE80211_ADDR_EQ(wh->i_addr1, lwh->i_addr1) ||
232 !IEEE80211_ADDR_EQ(wh->i_addr2, lwh->i_addr2)) {
234 * Unrelated fragment or no space for it,
235 * clear current fragments.
243 if (fragno != 0) { /* !first fragment, discard */
244 vap->iv_stats.is_rx_defrag++;
245 IEEE80211_NODE_STAT(ni, rx_defrag);
250 } else { /* concatenate */
251 m_adj(m, hdrspace); /* strip header */
253 /* NB: m_cat doesn't update the packet header */
254 mfrag->m_pkthdr.len += m->m_pkthdr.len;
255 /* track last seqnum and fragno */
256 lwh = mtod(mfrag, struct ieee80211_frame *);
257 *(uint16_t *) lwh->i_seq = *(uint16_t *) wh->i_seq;
259 if (more_frag) { /* more to come, save */
260 ni->ni_rxfragstamp = ticks;
261 ni->ni_rxfrag[0] = mfrag;
268 ieee80211_deliver_data(struct ieee80211vap *vap,
269 struct ieee80211_node *ni, struct mbuf *m)
271 struct ether_header *eh = mtod(m, struct ether_header *);
272 struct ifnet *ifp = vap->iv_ifp;
274 /* clear driver/net80211 flags before passing up */
275 m->m_flags &= ~(M_MCAST | M_BCAST);
278 /* NB: see hostap_deliver_data, this path doesn't handle hostap */
279 KASSERT(vap->iv_opmode != IEEE80211_M_HOSTAP, ("gack, hostap"));
283 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
284 IEEE80211_NODE_STAT(ni, rx_data);
285 IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len);
286 if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
287 m->m_flags |= M_MCAST; /* XXX M_BCAST? */
288 IEEE80211_NODE_STAT(ni, rx_mcast);
290 IEEE80211_NODE_STAT(ni, rx_ucast);
291 m->m_pkthdr.rcvif = ifp;
293 if (ni->ni_vlan != 0) {
294 /* attach vlan tag */
295 m->m_pkthdr.ether_vtag = ni->ni_vlan;
296 m->m_flags |= M_VLANTAG;
298 ifp->if_input(ifp, m);
302 ieee80211_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen)
304 struct ieee80211_qosframe_addr4 wh;
305 struct ether_header *eh;
308 KASSERT(hdrlen <= sizeof(wh),
309 ("hdrlen %d > max %zd", hdrlen, sizeof(wh)));
311 if (m->m_len < hdrlen + sizeof(*llc) &&
312 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
313 vap->iv_stats.is_rx_tooshort++;
317 memcpy(&wh, mtod(m, caddr_t), hdrlen);
318 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
319 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
320 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
321 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
322 /* NB: preserve AppleTalk frames that have a native SNAP hdr */
323 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
324 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
325 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
328 m_adj(m, hdrlen - sizeof(*eh));
330 eh = mtod(m, struct ether_header *);
331 switch (wh.i_fc[1] & IEEE80211_FC1_DIR_MASK) {
332 case IEEE80211_FC1_DIR_NODS:
333 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr1);
334 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr2);
336 case IEEE80211_FC1_DIR_TODS:
337 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr3);
338 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr2);
340 case IEEE80211_FC1_DIR_FROMDS:
341 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr1);
342 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr3);
344 case IEEE80211_FC1_DIR_DSTODS:
345 IEEE80211_ADDR_COPY(eh->ether_dhost, wh.i_addr3);
346 IEEE80211_ADDR_COPY(eh->ether_shost, wh.i_addr4);
349 #ifndef __NO_STRICT_ALIGNMENT
350 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
351 m = ieee80211_realign(vap, m, sizeof(*eh));
355 #endif /* !__NO_STRICT_ALIGNMENT */
357 eh = mtod(m, struct ether_header *);
358 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
364 * Decap a frame encapsulated in a fast-frame/A-MSDU.
367 ieee80211_decap1(struct mbuf *m, int *framelen)
369 #define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc))
370 struct ether_header *eh;
374 * The frame has an 802.3 header followed by an 802.2
375 * LLC header. The encapsulated frame length is in the
376 * first header type field; save that and overwrite it
377 * with the true type field found in the second. Then
378 * copy the 802.3 header up to where it belongs and
379 * adjust the mbuf contents to remove the void.
381 if (m->m_len < FF_LLC_SIZE && (m = m_pullup(m, FF_LLC_SIZE)) == NULL)
383 eh = mtod(m, struct ether_header *); /* 802.3 header is first */
384 llc = (struct llc *)&eh[1]; /* 802.2 header follows */
385 *framelen = ntohs(eh->ether_type) /* encap'd frame size */
386 + sizeof(struct ether_header) - sizeof(struct llc);
387 eh->ether_type = llc->llc_un.type_snap.ether_type;
388 ovbcopy(eh, mtod(m, uint8_t *) + sizeof(struct llc),
389 sizeof(struct ether_header));
390 m_adj(m, sizeof(struct llc));
396 * Install received rate set information in the node's state block.
399 ieee80211_setup_rates(struct ieee80211_node *ni,
400 const uint8_t *rates, const uint8_t *xrates, int flags)
402 struct ieee80211vap *vap = ni->ni_vap;
403 struct ieee80211_rateset *rs = &ni->ni_rates;
405 memset(rs, 0, sizeof(*rs));
406 rs->rs_nrates = rates[1];
407 memcpy(rs->rs_rates, rates + 2, rs->rs_nrates);
408 if (xrates != NULL) {
411 * Tack on 11g extended supported rate element.
414 if (rs->rs_nrates + nxrates > IEEE80211_RATE_MAXSIZE) {
415 nxrates = IEEE80211_RATE_MAXSIZE - rs->rs_nrates;
416 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE, ni,
417 "extended rate set too large; only using "
418 "%u of %u rates", nxrates, xrates[1]);
419 vap->iv_stats.is_rx_rstoobig++;
421 memcpy(rs->rs_rates + rs->rs_nrates, xrates+2, nxrates);
422 rs->rs_nrates += nxrates;
424 return ieee80211_fix_rate(ni, rs, flags);
428 * Send a management frame error response to the specified
429 * station. If ni is associated with the station then use
430 * it; otherwise allocate a temporary node suitable for
431 * transmitting the frame and then free the reference so
432 * it will go away as soon as the frame has been transmitted.
435 ieee80211_send_error(struct ieee80211_node *ni,
436 const uint8_t mac[IEEE80211_ADDR_LEN], int subtype, int arg)
438 struct ieee80211vap *vap = ni->ni_vap;
441 if (ni == vap->iv_bss) {
442 if (vap->iv_state != IEEE80211_S_RUN) {
444 * XXX hack until we get rid of this routine.
445 * We can be called prior to the vap reaching
446 * run state under certain conditions in which
447 * case iv_bss->ni_chan will not be setup.
448 * Check for this explicitly and and just ignore
453 ni = ieee80211_tmp_node(vap, mac);
461 IEEE80211_SEND_MGMT(ni, subtype, arg);
463 ieee80211_free_node(ni);
467 ieee80211_alloc_challenge(struct ieee80211_node *ni)
469 if (ni->ni_challenge == NULL)
470 ni->ni_challenge = (uint32_t *)
471 IEEE80211_MALLOC(IEEE80211_CHALLENGE_LEN,
472 M_80211_NODE, IEEE80211_M_NOWAIT);
473 if (ni->ni_challenge == NULL) {
474 IEEE80211_NOTE(ni->ni_vap,
475 IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni,
476 "%s", "shared key challenge alloc failed");
479 return (ni->ni_challenge != NULL);
483 * Parse a Beacon or ProbeResponse frame and return the
484 * useful information in an ieee80211_scanparams structure.
485 * Status is set to 0 if no problems were found; otherwise
486 * a bitmask of IEEE80211_BPARSE_* items is returned that
487 * describes the problems detected.
490 ieee80211_parse_beacon(struct ieee80211_node *ni, struct mbuf *m,
491 struct ieee80211_channel *rxchan, struct ieee80211_scanparams *scan)
493 struct ieee80211vap *vap = ni->ni_vap;
494 struct ieee80211com *ic = ni->ni_ic;
495 struct ieee80211_frame *wh;
498 wh = mtod(m, struct ieee80211_frame *);
499 frm = (uint8_t *)&wh[1];
500 efrm = mtod(m, uint8_t *) + m->m_len;
503 * beacon/probe response frame format
505 * [2] beacon interval
506 * [2] capability information
508 * [tlv] supported rates
509 * [tlv] country information
510 * [tlv] channel switch announcement (CSA)
511 * [tlv] parameter set (FH/DS)
512 * [tlv] erp information
513 * [tlv] extended supported rates
516 * [tlv] HT capabilities
517 * [tlv] HT information
518 * [tlv] Atheros capabilities
520 * [tlv] Mesh Configuration
522 IEEE80211_VERIFY_LENGTH(efrm - frm, 12,
523 return (scan->status = IEEE80211_BPARSE_BADIELEN));
524 memset(scan, 0, sizeof(*scan));
525 scan->tstamp = frm; frm += 8;
526 scan->bintval = le16toh(*(uint16_t *)frm); frm += 2;
527 scan->capinfo = le16toh(*(uint16_t *)frm); frm += 2;
528 scan->bchan = ieee80211_chan2ieee(ic, rxchan);
529 scan->chan = scan->bchan;
531 scan->ies_len = efrm - frm;
533 while (efrm - frm > 1) {
534 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2,
535 return (scan->status = IEEE80211_BPARSE_BADIELEN));
537 case IEEE80211_ELEMID_SSID:
540 case IEEE80211_ELEMID_RATES:
543 case IEEE80211_ELEMID_COUNTRY:
546 case IEEE80211_ELEMID_CSA:
549 case IEEE80211_ELEMID_QUIET:
552 case IEEE80211_ELEMID_FHPARMS:
553 if (ic->ic_phytype == IEEE80211_T_FH) {
554 scan->fhdwell = LE_READ_2(&frm[2]);
555 scan->chan = IEEE80211_FH_CHAN(frm[4], frm[5]);
556 scan->fhindex = frm[6];
559 case IEEE80211_ELEMID_DSPARMS:
561 * XXX hack this since depending on phytype
562 * is problematic for multi-mode devices.
564 if (ic->ic_phytype != IEEE80211_T_FH)
567 case IEEE80211_ELEMID_TIM:
570 scan->timoff = frm - mtod(m, uint8_t *);
572 case IEEE80211_ELEMID_IBSSPARMS:
573 case IEEE80211_ELEMID_CFPARMS:
574 case IEEE80211_ELEMID_PWRCNSTR:
575 /* NB: avoid debugging complaints */
577 case IEEE80211_ELEMID_XRATES:
580 case IEEE80211_ELEMID_ERP:
582 IEEE80211_DISCARD_IE(vap,
583 IEEE80211_MSG_ELEMID, wh, "ERP",
584 "bad len %u", frm[1]);
585 vap->iv_stats.is_rx_elem_toobig++;
588 scan->erp = frm[2] | 0x100;
590 case IEEE80211_ELEMID_HTCAP:
593 case IEEE80211_ELEMID_RSN:
596 case IEEE80211_ELEMID_HTINFO:
599 #ifdef IEEE80211_SUPPORT_MESH
600 case IEEE80211_ELEMID_MESHID:
603 case IEEE80211_ELEMID_MESHCONF:
604 scan->meshconf = frm;
607 case IEEE80211_ELEMID_VENDOR:
610 else if (iswmeparam(frm) || iswmeinfo(frm))
612 #ifdef IEEE80211_SUPPORT_SUPERG
613 else if (isatherosoui(frm))
616 #ifdef IEEE80211_SUPPORT_TDMA
617 else if (istdmaoui(frm))
620 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) {
622 * Accept pre-draft HT ie's if the
623 * standard ones have not been seen.
625 if (ishtcapoui(frm)) {
626 if (scan->htcap == NULL)
628 } else if (ishtinfooui(frm)) {
629 if (scan->htinfo == NULL)
635 IEEE80211_DISCARD_IE(vap, IEEE80211_MSG_ELEMID,
637 "id %u, len %u", *frm, frm[1]);
638 vap->iv_stats.is_rx_elem_unknown++;
643 IEEE80211_VERIFY_ELEMENT(scan->rates, IEEE80211_RATE_MAXSIZE,
644 scan->status |= IEEE80211_BPARSE_RATES_INVALID);
645 if (scan->rates != NULL && scan->xrates != NULL) {
647 * NB: don't process XRATES if RATES is missing. This
648 * avoids a potential null ptr deref and should be ok
649 * as the return code will already note RATES is missing
650 * (so callers shouldn't otherwise process the frame).
652 IEEE80211_VERIFY_ELEMENT(scan->xrates,
653 IEEE80211_RATE_MAXSIZE - scan->rates[1],
654 scan->status |= IEEE80211_BPARSE_XRATES_INVALID);
656 IEEE80211_VERIFY_ELEMENT(scan->ssid, IEEE80211_NWID_LEN,
657 scan->status |= IEEE80211_BPARSE_SSID_INVALID);
658 if (scan->chan != scan->bchan && ic->ic_phytype != IEEE80211_T_FH) {
660 * Frame was received on a channel different from the
661 * one indicated in the DS params element id;
662 * silently discard it.
664 * NB: this can happen due to signal leakage.
665 * But we should take it for FH phy because
666 * the rssi value should be correct even for
667 * different hop pattern in FH.
669 IEEE80211_DISCARD(vap,
670 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
671 wh, NULL, "for off-channel %u (bchan=%u)",
672 scan->chan, scan->bchan);
673 vap->iv_stats.is_rx_chanmismatch++;
674 scan->status |= IEEE80211_BPARSE_OFFCHAN;
676 if (!(IEEE80211_BINTVAL_MIN <= scan->bintval &&
677 scan->bintval <= IEEE80211_BINTVAL_MAX)) {
678 IEEE80211_DISCARD(vap,
679 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
680 wh, NULL, "bogus beacon interval (%d TU)",
681 (int) scan->bintval);
682 vap->iv_stats.is_rx_badbintval++;
683 scan->status |= IEEE80211_BPARSE_BINTVAL_INVALID;
685 if (scan->country != NULL) {
687 * Validate we have at least enough data to extract
688 * the country code. Not sure if we should return an
689 * error instead of discarding the IE; consider this
690 * being lenient as we don't depend on the data for
693 IEEE80211_VERIFY_LENGTH(scan->country[1], 3 * sizeof(uint8_t),
694 scan->country = NULL);
696 if (scan->csa != NULL) {
698 * Validate Channel Switch Announcement; this must
699 * be the correct length or we toss the frame.
701 IEEE80211_VERIFY_LENGTH(scan->csa[1], 3 * sizeof(uint8_t),
702 scan->status |= IEEE80211_BPARSE_CSA_INVALID);
705 * Process HT ie's. This is complicated by our
706 * accepting both the standard ie's and the pre-draft
707 * vendor OUI ie's that some vendors still use/require.
709 if (scan->htcap != NULL) {
710 IEEE80211_VERIFY_LENGTH(scan->htcap[1],
711 scan->htcap[0] == IEEE80211_ELEMID_VENDOR ?
712 4 + sizeof(struct ieee80211_ie_htcap)-2 :
713 sizeof(struct ieee80211_ie_htcap)-2,
716 if (scan->htinfo != NULL) {
717 IEEE80211_VERIFY_LENGTH(scan->htinfo[1],
718 scan->htinfo[0] == IEEE80211_ELEMID_VENDOR ?
719 4 + sizeof(struct ieee80211_ie_htinfo)-2 :
720 sizeof(struct ieee80211_ie_htinfo)-2,
721 scan->htinfo = NULL);
727 * Parse an Action frame. Return 0 on success, non-zero on failure.
730 ieee80211_parse_action(struct ieee80211_node *ni, struct mbuf *m)
732 struct ieee80211vap *vap = ni->ni_vap;
733 const struct ieee80211_action *ia;
734 struct ieee80211_frame *wh;
738 * action frame format:
743 wh = mtod(m, struct ieee80211_frame *);
744 frm = (u_int8_t *)&wh[1];
745 efrm = mtod(m, u_int8_t *) + m->m_len;
746 IEEE80211_VERIFY_LENGTH(efrm - frm,
747 sizeof(struct ieee80211_action), return EINVAL);
748 ia = (const struct ieee80211_action *) frm;
750 vap->iv_stats.is_rx_action++;
751 IEEE80211_NODE_STAT(ni, rx_action);
753 /* verify frame payloads but defer processing */
754 switch (ia->ia_category) {
755 case IEEE80211_ACTION_CAT_BA:
756 switch (ia->ia_action) {
757 case IEEE80211_ACTION_BA_ADDBA_REQUEST:
758 IEEE80211_VERIFY_LENGTH(efrm - frm,
759 sizeof(struct ieee80211_action_ba_addbarequest),
762 case IEEE80211_ACTION_BA_ADDBA_RESPONSE:
763 IEEE80211_VERIFY_LENGTH(efrm - frm,
764 sizeof(struct ieee80211_action_ba_addbaresponse),
767 case IEEE80211_ACTION_BA_DELBA:
768 IEEE80211_VERIFY_LENGTH(efrm - frm,
769 sizeof(struct ieee80211_action_ba_delba),
774 case IEEE80211_ACTION_CAT_HT:
775 switch (ia->ia_action) {
776 case IEEE80211_ACTION_HT_TXCHWIDTH:
777 IEEE80211_VERIFY_LENGTH(efrm - frm,
778 sizeof(struct ieee80211_action_ht_txchwidth),
781 case IEEE80211_ACTION_HT_MIMOPWRSAVE:
782 IEEE80211_VERIFY_LENGTH(efrm - frm,
783 sizeof(struct ieee80211_action_ht_mimopowersave),
788 #ifdef IEEE80211_SUPPORT_MESH
789 case IEEE80211_ACTION_CAT_MESH:
790 switch (ia->ia_action) {
791 case IEEE80211_ACTION_MESH_LMETRIC:
793 * XXX: verification is true only if we are using
794 * Airtime link metric (default)
796 IEEE80211_VERIFY_LENGTH(efrm - frm,
797 sizeof(struct ieee80211_meshlmetric_ie),
800 case IEEE80211_ACTION_MESH_HWMP:
801 /* verify something */
803 case IEEE80211_ACTION_MESH_GANN:
804 IEEE80211_VERIFY_LENGTH(efrm - frm,
805 sizeof(struct ieee80211_meshgann_ie),
808 case IEEE80211_ACTION_MESH_CC:
809 case IEEE80211_ACTION_MESH_MCCA_SREQ:
810 case IEEE80211_ACTION_MESH_MCCA_SREP:
811 case IEEE80211_ACTION_MESH_MCCA_AREQ:
812 case IEEE80211_ACTION_MESH_MCCA_ADVER:
813 case IEEE80211_ACTION_MESH_MCCA_TRDOWN:
814 case IEEE80211_ACTION_MESH_TBTT_REQ:
815 case IEEE80211_ACTION_MESH_TBTT_RES:
816 /* reject these early on, not implemented */
817 IEEE80211_DISCARD(vap,
818 IEEE80211_MSG_ELEMID | IEEE80211_MSG_INPUT,
819 wh, NULL, "not implemented yet, act=0x%02X",
824 case IEEE80211_ACTION_CAT_SELF_PROT:
825 /* If TA or RA group address discard silently */
826 if (IEEE80211_IS_MULTICAST(wh->i_addr1) ||
827 IEEE80211_IS_MULTICAST(wh->i_addr2))
830 * XXX: Should we verify complete length now or it is
831 * to varying in sizes?
833 switch (ia->ia_action) {
834 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
835 case IEEE80211_ACTION_MESHPEERING_CLOSE:
836 /* is not a peering candidate (yet) */
837 if (ni == vap->iv_bss)
847 #ifdef IEEE80211_DEBUG
852 ieee80211_ssid_mismatch(struct ieee80211vap *vap, const char *tag,
853 uint8_t mac[IEEE80211_ADDR_LEN], uint8_t *ssid)
855 printf("[%s] discard %s frame, ssid mismatch: ",
856 ether_sprintf(mac), tag);
857 ieee80211_print_essid(ssid + 2, ssid[1]);
862 * Return the bssid of a frame.
864 static const uint8_t *
865 ieee80211_getbssid(const struct ieee80211vap *vap,
866 const struct ieee80211_frame *wh)
868 if (vap->iv_opmode == IEEE80211_M_STA)
870 if ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) != IEEE80211_FC1_DIR_NODS)
872 if ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == IEEE80211_FC0_SUBTYPE_PS_POLL)
877 #include <machine/stdarg.h>
880 ieee80211_note(const struct ieee80211vap *vap, const char *fmt, ...)
882 char buf[128]; /* XXX */
886 vsnprintf(buf, sizeof(buf), fmt, ap);
889 if_printf(vap->iv_ifp, "%s", buf); /* NB: no \n */
893 ieee80211_note_frame(const struct ieee80211vap *vap,
894 const struct ieee80211_frame *wh,
895 const char *fmt, ...)
897 char buf[128]; /* XXX */
901 vsnprintf(buf, sizeof(buf), fmt, ap);
903 if_printf(vap->iv_ifp, "[%s] %s\n",
904 ether_sprintf(ieee80211_getbssid(vap, wh)), buf);
908 ieee80211_note_mac(const struct ieee80211vap *vap,
909 const uint8_t mac[IEEE80211_ADDR_LEN],
910 const char *fmt, ...)
912 char buf[128]; /* XXX */
916 vsnprintf(buf, sizeof(buf), fmt, ap);
918 if_printf(vap->iv_ifp, "[%s] %s\n", ether_sprintf(mac), buf);
922 ieee80211_discard_frame(const struct ieee80211vap *vap,
923 const struct ieee80211_frame *wh,
924 const char *type, const char *fmt, ...)
928 if_printf(vap->iv_ifp, "[%s] discard ",
929 ether_sprintf(ieee80211_getbssid(vap, wh)));
931 printf("%s frame, ", ieee80211_mgt_subtype_name[
932 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) >>
933 IEEE80211_FC0_SUBTYPE_SHIFT]);
935 printf("%s frame, ", type);
943 ieee80211_discard_ie(const struct ieee80211vap *vap,
944 const struct ieee80211_frame *wh,
945 const char *type, const char *fmt, ...)
949 if_printf(vap->iv_ifp, "[%s] discard ",
950 ether_sprintf(ieee80211_getbssid(vap, wh)));
952 printf("%s information element, ", type);
954 printf("information element, ");
962 ieee80211_discard_mac(const struct ieee80211vap *vap,
963 const uint8_t mac[IEEE80211_ADDR_LEN],
964 const char *type, const char *fmt, ...)
968 if_printf(vap->iv_ifp, "[%s] discard ", ether_sprintf(mac));
970 printf("%s frame, ", type);
978 #endif /* IEEE80211_DEBUG */