2 * Copyright (c) 2007-2009 Sam Leffler, Errno Consulting
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
32 * IEEE 802.11 IBSS mode support.
37 #include <sys/param.h>
38 #include <sys/systm.h>
40 #include <sys/malloc.h>
41 #include <sys/kernel.h>
43 #include <sys/socket.h>
44 #include <sys/sockio.h>
45 #include <sys/endian.h>
46 #include <sys/errno.h>
48 #include <sys/sysctl.h>
51 #include <net/if_var.h>
52 #include <net/if_media.h>
53 #include <net/if_llc.h>
54 #include <net/ethernet.h>
58 #include <net80211/ieee80211_var.h>
59 #include <net80211/ieee80211_adhoc.h>
60 #include <net80211/ieee80211_input.h>
61 #ifdef IEEE80211_SUPPORT_SUPERG
62 #include <net80211/ieee80211_superg.h>
64 #ifdef IEEE80211_SUPPORT_TDMA
65 #include <net80211/ieee80211_tdma.h>
67 #include <net80211/ieee80211_sta.h>
69 #define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2)
71 static void adhoc_vattach(struct ieee80211vap *);
72 static int adhoc_newstate(struct ieee80211vap *, enum ieee80211_state, int);
73 static int adhoc_input(struct ieee80211_node *, struct mbuf *,
74 const struct ieee80211_rx_stats *, int, int);
75 static void adhoc_recv_mgmt(struct ieee80211_node *, struct mbuf *,
76 int subtype, const struct ieee80211_rx_stats *, int, int);
77 static void ahdemo_recv_mgmt(struct ieee80211_node *, struct mbuf *,
78 int subtype, const struct ieee80211_rx_stats *rxs, int, int);
79 static void adhoc_recv_ctl(struct ieee80211_node *, struct mbuf *, int subtype);
82 ieee80211_adhoc_attach(struct ieee80211com *ic)
84 ic->ic_vattach[IEEE80211_M_IBSS] = adhoc_vattach;
85 ic->ic_vattach[IEEE80211_M_AHDEMO] = adhoc_vattach;
89 ieee80211_adhoc_detach(struct ieee80211com *ic)
94 adhoc_vdetach(struct ieee80211vap *vap)
99 adhoc_vattach(struct ieee80211vap *vap)
101 vap->iv_newstate = adhoc_newstate;
102 vap->iv_input = adhoc_input;
103 if (vap->iv_opmode == IEEE80211_M_IBSS)
104 vap->iv_recv_mgmt = adhoc_recv_mgmt;
106 vap->iv_recv_mgmt = ahdemo_recv_mgmt;
107 vap->iv_recv_ctl = adhoc_recv_ctl;
108 vap->iv_opdetach = adhoc_vdetach;
109 #ifdef IEEE80211_SUPPORT_TDMA
111 * Throw control to tdma support. Note we do this
112 * after setting up our callbacks so it can piggyback
115 if (vap->iv_caps & IEEE80211_C_TDMA)
116 ieee80211_tdma_vattach(vap);
121 sta_leave(void *arg, struct ieee80211_node *ni)
123 struct ieee80211vap *vap = arg;
125 if (ni->ni_vap == vap && ni != vap->iv_bss)
126 ieee80211_node_leave(ni);
130 * IEEE80211_M_IBSS+IEEE80211_M_AHDEMO vap state machine handler.
133 adhoc_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
135 struct ieee80211com *ic = vap->iv_ic;
136 struct ieee80211_node *ni;
137 enum ieee80211_state ostate;
139 IEEE80211_LOCK_ASSERT(vap->iv_ic);
141 ostate = vap->iv_state;
142 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
143 __func__, ieee80211_state_name[ostate],
144 ieee80211_state_name[nstate], arg);
145 vap->iv_state = nstate; /* state transition */
146 if (ostate != IEEE80211_S_SCAN)
147 ieee80211_cancel_scan(vap); /* background scan */
148 ni = vap->iv_bss; /* NB: no reference held */
150 case IEEE80211_S_INIT:
152 case IEEE80211_S_SCAN:
153 ieee80211_cancel_scan(vap);
158 if (ostate != IEEE80211_S_INIT) {
159 /* NB: optimize INIT -> INIT case */
160 ieee80211_reset_bss(vap);
163 case IEEE80211_S_SCAN:
165 case IEEE80211_S_RUN: /* beacon miss */
166 /* purge station table; entries are stale */
167 ieee80211_iterate_nodes(&ic->ic_sta, sta_leave, vap);
169 case IEEE80211_S_INIT:
170 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
171 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan)) {
173 * Already have a channel; bypass the
174 * scan and startup immediately.
176 ieee80211_create_ibss(vap,
177 ieee80211_ht_adjust_channel(ic,
178 vap->iv_des_chan, vap->iv_flags_ht));
182 * Initiate a scan. We can come here as a result
183 * of an IEEE80211_IOC_SCAN_REQ too in which case
184 * the vap will be marked with IEEE80211_FEXT_SCANREQ
185 * and the scan request parameters will be present
186 * in iv_scanreq. Otherwise we do the default.
188 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
189 ieee80211_check_scan(vap,
190 vap->iv_scanreq_flags,
191 vap->iv_scanreq_duration,
192 vap->iv_scanreq_mindwell,
193 vap->iv_scanreq_maxdwell,
194 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
195 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
197 ieee80211_check_scan_current(vap);
199 case IEEE80211_S_SCAN:
201 * This can happen because of a change in state
202 * that requires a reset. Trigger a new scan
203 * unless we're in manual roaming mode in which
204 * case an application must issue an explicit request.
206 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO)
207 ieee80211_check_scan_current(vap);
213 case IEEE80211_S_RUN:
214 if (vap->iv_flags & IEEE80211_F_WPA) {
215 /* XXX validate prerequisites */
218 case IEEE80211_S_INIT:
220 * Already have a channel; bypass the
221 * scan and startup immediately.
222 * Note that ieee80211_create_ibss will call
223 * back to do a RUN->RUN state change.
225 ieee80211_create_ibss(vap,
226 ieee80211_ht_adjust_channel(ic,
227 ic->ic_curchan, vap->iv_flags_ht));
228 /* NB: iv_bss is changed on return */
231 case IEEE80211_S_SCAN:
232 #ifdef IEEE80211_DEBUG
233 if (ieee80211_msg_debug(vap)) {
235 "synchronized with %s ssid ",
236 ether_sprintf(ni->ni_bssid));
237 ieee80211_print_essid(vap->iv_bss->ni_essid,
240 printf(" channel %d start %uMb\n",
241 ieee80211_chan2ieee(ic, ic->ic_curchan),
242 IEEE80211_RATE2MBS(ni->ni_txrate));
246 case IEEE80211_S_RUN: /* IBSS merge */
252 * When 802.1x is not in use mark the port authorized
253 * at this point so traffic can flow.
255 if (ni->ni_authmode != IEEE80211_AUTH_8021X)
256 ieee80211_node_authorize(ni);
258 * Fake association when joining an existing bss.
260 if (!IEEE80211_ADDR_EQ(ni->ni_macaddr, vap->iv_myaddr) &&
261 ic->ic_newassoc != NULL)
262 ic->ic_newassoc(ni, ostate != IEEE80211_S_RUN);
264 case IEEE80211_S_SLEEP:
265 vap->iv_sta_ps(vap, 0);
269 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
270 "%s: unexpected state transition %s -> %s\n", __func__,
271 ieee80211_state_name[ostate], ieee80211_state_name[nstate]);
278 * Decide if a received management frame should be
279 * printed when debugging is enabled. This filters some
280 * of the less interesting frames that come frequently
284 doprint(struct ieee80211vap *vap, int subtype)
287 case IEEE80211_FC0_SUBTYPE_BEACON:
288 return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN);
289 case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
296 * Process a received frame. The node associated with the sender
297 * should be supplied. If nothing was found in the node table then
298 * the caller is assumed to supply a reference to iv_bss instead.
299 * The RSSI and a timestamp are also supplied. The RSSI data is used
300 * during AP scanning to select a AP to associate with; it can have
301 * any units so long as values have consistent units and higher values
302 * mean ``better signal''. The receive timestamp is currently not used
303 * by the 802.11 layer.
306 adhoc_input(struct ieee80211_node *ni, struct mbuf *m,
307 const struct ieee80211_rx_stats *rxs, int rssi, int nf)
309 struct ieee80211vap *vap = ni->ni_vap;
310 struct ieee80211com *ic = ni->ni_ic;
311 struct ifnet *ifp = vap->iv_ifp;
312 struct ieee80211_frame *wh;
313 struct ieee80211_key *key;
314 struct ether_header *eh;
315 int hdrspace, need_tap = 1; /* mbuf need to be tapped. */
316 uint8_t dir, type, subtype, qos;
319 if (m->m_flags & M_AMPDU_MPDU) {
321 * Fastpath for A-MPDU reorder q resubmission. Frames
322 * w/ M_AMPDU_MPDU marked have already passed through
323 * here but were received out of order and been held on
324 * the reorder queue. When resubmitted they are marked
325 * with the M_AMPDU_MPDU flag and we can bypass most of
326 * the normal processing.
328 wh = mtod(m, struct ieee80211_frame *);
329 type = IEEE80211_FC0_TYPE_DATA;
330 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
331 subtype = IEEE80211_FC0_SUBTYPE_QOS;
332 hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */
336 KASSERT(ni != NULL, ("null node"));
337 ni->ni_inact = ni->ni_inact_reload;
339 type = -1; /* undefined */
341 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
342 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
343 ni->ni_macaddr, NULL,
344 "too short (1): len %u", m->m_pkthdr.len);
345 vap->iv_stats.is_rx_tooshort++;
349 * Bit of a cheat here, we use a pointer for a 3-address
350 * frame format but don't reference fields past outside
351 * ieee80211_frame_min w/o first validating the data is
354 wh = mtod(m, struct ieee80211_frame *);
356 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
357 IEEE80211_FC0_VERSION_0) {
358 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
359 ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x",
360 wh->i_fc[0], wh->i_fc[1]);
361 vap->iv_stats.is_rx_badversion++;
365 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
366 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
367 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
368 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
369 if (dir != IEEE80211_FC1_DIR_NODS)
371 else if (type == IEEE80211_FC0_TYPE_CTL)
374 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
375 IEEE80211_DISCARD_MAC(vap,
376 IEEE80211_MSG_ANY, ni->ni_macaddr,
377 NULL, "too short (2): len %u",
379 vap->iv_stats.is_rx_tooshort++;
385 * Validate the bssid.
387 if (!(type == IEEE80211_FC0_TYPE_MGT &&
388 (subtype == IEEE80211_FC0_SUBTYPE_BEACON ||
389 subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP)) &&
390 !IEEE80211_ADDR_EQ(bssid, vap->iv_bss->ni_bssid) &&
391 !IEEE80211_ADDR_EQ(bssid, ifp->if_broadcastaddr)) {
392 /* not interested in */
393 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
394 bssid, NULL, "%s", "not to bss");
395 vap->iv_stats.is_rx_wrongbss++;
399 * Data frame, cons up a node when it doesn't
400 * exist. This should probably done after an ACL check.
402 if (type == IEEE80211_FC0_TYPE_DATA &&
404 !IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
406 * Beware of frames that come in too early; we
407 * can receive broadcast frames and creating sta
408 * entries will blow up because there is no bss
411 if (vap->iv_state != IEEE80211_S_RUN) {
412 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
413 wh, "data", "not in RUN state (%s)",
414 ieee80211_state_name[vap->iv_state]);
415 vap->iv_stats.is_rx_badstate++;
419 * Fake up a node for this newly
420 * discovered member of the IBSS.
422 ni = ieee80211_fakeup_adhoc_node(vap, wh->i_addr2);
424 /* NB: stat kept for alloc failure */
428 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
430 if (IEEE80211_HAS_SEQ(type, subtype) &&
431 IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
432 uint8_t tid = ieee80211_gettid(wh);
433 if (IEEE80211_QOS_HAS_SEQ(wh) &&
434 TID_TO_WME_AC(tid) >= WME_AC_VI)
435 ic->ic_wme.wme_hipri_traffic++;
436 if (! ieee80211_check_rxseq(ni, wh, bssid))
442 case IEEE80211_FC0_TYPE_DATA:
443 hdrspace = ieee80211_hdrspace(ic, wh);
444 if (m->m_len < hdrspace &&
445 (m = m_pullup(m, hdrspace)) == NULL) {
446 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
447 ni->ni_macaddr, NULL,
448 "data too short: expecting %u", hdrspace);
449 vap->iv_stats.is_rx_tooshort++;
452 if (dir != IEEE80211_FC1_DIR_NODS) {
453 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
454 wh, "data", "incorrect dir 0x%x", dir);
455 vap->iv_stats.is_rx_wrongdir++;
458 /* XXX no power-save support */
461 * Handle A-MPDU re-ordering. If the frame is to be
462 * processed directly then ieee80211_ampdu_reorder
463 * will return 0; otherwise it has consumed the mbuf
464 * and we should do nothing more with it.
466 if ((m->m_flags & M_AMPDU) &&
467 ieee80211_ampdu_reorder(ni, m) != 0) {
474 * Handle privacy requirements. Note that we
475 * must not be preempted from here until after
476 * we (potentially) call ieee80211_crypto_demic;
477 * otherwise we may violate assumptions in the
478 * crypto cipher modules used to do delayed update
479 * of replay sequence numbers.
481 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
482 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
484 * Discard encrypted frames when privacy is off.
486 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
487 wh, "WEP", "%s", "PRIVACY off");
488 vap->iv_stats.is_rx_noprivacy++;
489 IEEE80211_NODE_STAT(ni, rx_noprivacy);
492 key = ieee80211_crypto_decap(ni, m, hdrspace);
494 /* NB: stats+msgs handled in crypto_decap */
495 IEEE80211_NODE_STAT(ni, rx_wepfail);
498 wh = mtod(m, struct ieee80211_frame *);
499 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED;
501 /* XXX M_WEP and IEEE80211_F_PRIVACY */
506 * Save QoS bits for use below--before we strip the header.
508 if (subtype == IEEE80211_FC0_SUBTYPE_QOS) {
509 qos = (dir == IEEE80211_FC1_DIR_DSTODS) ?
510 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] :
511 ((struct ieee80211_qosframe *)wh)->i_qos[0];
516 * Next up, any fragmentation.
518 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
519 m = ieee80211_defrag(ni, m, hdrspace);
521 /* Fragment dropped or frame not complete yet */
525 wh = NULL; /* no longer valid, catch any uses */
528 * Next strip any MSDU crypto bits.
530 if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) {
531 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
532 ni->ni_macaddr, "data", "%s", "demic error");
533 vap->iv_stats.is_rx_demicfail++;
534 IEEE80211_NODE_STAT(ni, rx_demicfail);
538 /* copy to listener after decrypt */
539 if (ieee80211_radiotap_active_vap(vap))
540 ieee80211_radiotap_rx(vap, m);
544 * Finally, strip the 802.11 header.
546 m = ieee80211_decap(vap, m, hdrspace);
548 /* XXX mask bit to check for both */
549 /* don't count Null data frames as errors */
550 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
551 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
553 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
554 ni->ni_macaddr, "data", "%s", "decap error");
555 vap->iv_stats.is_rx_decap++;
556 IEEE80211_NODE_STAT(ni, rx_decap);
559 eh = mtod(m, struct ether_header *);
560 if (!ieee80211_node_is_authorized(ni)) {
562 * Deny any non-PAE frames received prior to
563 * authorization. For open/shared-key
564 * authentication the port is mark authorized
565 * after authentication completes. For 802.1x
566 * the port is not marked authorized by the
567 * authenticator until the handshake has completed.
569 if (eh->ether_type != htons(ETHERTYPE_PAE)) {
570 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
571 eh->ether_shost, "data",
572 "unauthorized port: ether type 0x%x len %u",
573 eh->ether_type, m->m_pkthdr.len);
574 vap->iv_stats.is_rx_unauth++;
575 IEEE80211_NODE_STAT(ni, rx_unauth);
580 * When denying unencrypted frames, discard
581 * any non-PAE frames received without encryption.
583 if ((vap->iv_flags & IEEE80211_F_DROPUNENC) &&
584 (key == NULL && (m->m_flags & M_WEP) == 0) &&
585 eh->ether_type != htons(ETHERTYPE_PAE)) {
587 * Drop unencrypted frames.
589 vap->iv_stats.is_rx_unencrypted++;
590 IEEE80211_NODE_STAT(ni, rx_unencrypted);
594 /* XXX require HT? */
595 if (qos & IEEE80211_QOS_AMSDU) {
596 m = ieee80211_decap_amsdu(ni, m);
598 return IEEE80211_FC0_TYPE_DATA;
600 #ifdef IEEE80211_SUPPORT_SUPERG
601 m = ieee80211_decap_fastframe(vap, ni, m);
603 return IEEE80211_FC0_TYPE_DATA;
606 if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap != NULL)
607 ieee80211_deliver_data(ni->ni_wdsvap, ni, m);
609 ieee80211_deliver_data(vap, ni, m);
610 return IEEE80211_FC0_TYPE_DATA;
612 case IEEE80211_FC0_TYPE_MGT:
613 vap->iv_stats.is_rx_mgmt++;
614 IEEE80211_NODE_STAT(ni, rx_mgmt);
615 if (dir != IEEE80211_FC1_DIR_NODS) {
616 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
617 wh, "data", "incorrect dir 0x%x", dir);
618 vap->iv_stats.is_rx_wrongdir++;
621 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
622 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
623 ni->ni_macaddr, "mgt", "too short: len %u",
625 vap->iv_stats.is_rx_tooshort++;
628 #ifdef IEEE80211_DEBUG
629 if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) ||
630 ieee80211_msg_dumppkts(vap)) {
631 if_printf(ifp, "received %s from %s rssi %d\n",
632 ieee80211_mgt_subtype_name(subtype),
633 ether_sprintf(wh->i_addr2), rssi);
636 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
637 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
638 wh, NULL, "%s", "WEP set but not permitted");
639 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
642 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf);
645 case IEEE80211_FC0_TYPE_CTL:
646 vap->iv_stats.is_rx_ctl++;
647 IEEE80211_NODE_STAT(ni, rx_ctrl);
648 vap->iv_recv_ctl(ni, m, subtype);
652 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
653 wh, "bad", "frame type 0x%x", type);
654 /* should not come here */
658 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
661 if (need_tap && ieee80211_radiotap_active_vap(vap))
662 ieee80211_radiotap_rx(vap, m);
669 is11bclient(const uint8_t *rates, const uint8_t *xrates)
671 static const uint32_t brates = (1<<2*1)|(1<<2*2)|(1<<11)|(1<<2*11);
674 /* NB: the 11b clients we care about will not have xrates */
675 if (xrates != NULL || rates == NULL)
677 for (i = 0; i < rates[1]; i++) {
678 int r = rates[2+i] & IEEE80211_RATE_VAL;
679 if (r > 2*11 || ((1<<r) & brates) == 0)
686 adhoc_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0,
687 int subtype, const struct ieee80211_rx_stats *rxs, int rssi, int nf)
689 struct ieee80211vap *vap = ni->ni_vap;
690 struct ieee80211com *ic = ni->ni_ic;
691 struct ieee80211_channel *rxchan = ic->ic_curchan;
692 struct ieee80211_frame *wh;
694 uint8_t *ssid, *rates, *xrates;
696 int ht_state_change = 0;
699 wh = mtod(m0, struct ieee80211_frame *);
700 frm = (uint8_t *)&wh[1];
701 efrm = mtod(m0, uint8_t *) + m0->m_len;
703 case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
704 case IEEE80211_FC0_SUBTYPE_BEACON: {
705 struct ieee80211_scanparams scan;
706 struct ieee80211_channel *c;
708 * We process beacon/probe response
709 * frames to discover neighbors.
712 c = ieee80211_lookup_channel_rxstatus(vap, rxs);
716 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0)
719 * Count frame now that we know it's to be processed.
721 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
722 vap->iv_stats.is_rx_beacon++; /* XXX remove */
723 IEEE80211_NODE_STAT(ni, rx_beacons);
725 IEEE80211_NODE_STAT(ni, rx_proberesp);
727 * If scanning, just pass information to the scan module.
729 if (ic->ic_flags & IEEE80211_F_SCAN) {
730 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
732 * Actively scanning a channel marked passive;
733 * send a probe request now that we know there
734 * is 802.11 traffic present.
736 * XXX check if the beacon we recv'd gives
737 * us what we need and suppress the probe req
739 ieee80211_probe_curchan(vap, 1);
740 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
742 ieee80211_add_scan(vap, rxchan, &scan, wh,
746 if (scan.capinfo & IEEE80211_CAPINFO_IBSS) {
747 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
749 * Create a new entry in the neighbor table.
753 * Here we're not scanning; so if we have an
754 * SSID then make sure it matches our SSID.
755 * Otherwise this code will match on all IBSS
756 * beacons/probe requests for all SSIDs,
757 * filling the node table with nodes that
760 if (ieee80211_ibss_node_check_new(ni, &scan))
761 ni = ieee80211_add_neighbor(vap, wh, &scan);
764 } else if (ni->ni_capinfo == 0) {
766 * Update faked node created on transmit.
767 * Note this also updates the tsf.
769 ieee80211_init_neighbor(ni, wh, &scan);
772 * Record tsf for potential resync.
774 memcpy(ni->ni_tstamp.data, scan.tstamp,
775 sizeof(ni->ni_tstamp));
778 * This isn't enabled yet - otherwise it would
779 * update the HT parameters and channel width
780 * from any node, which could lead to lots of
781 * strange behaviour if the 11n nodes aren't
782 * exactly configured to match.
785 if (scan.htcap != NULL && scan.htinfo != NULL &&
786 (vap->iv_flags_ht & IEEE80211_FHT_HT)) {
787 if (ieee80211_ht_updateparams(ni,
788 scan.htcap, scan.htinfo))
793 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
797 * Same here - the channel width change should
798 * be applied to the specific peer node, not
799 * to the ic. Ie, the interface configuration
800 * should stay in its current channel width;
801 * but it should change the rate control and
802 * any queued frames for the given node only.
804 * Since there's no (current) way to inform
805 * the driver that a channel width change has
806 * occurred for a single node, just stub this
811 ieee80211_update_chw(ic);
817 case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
818 if (vap->iv_state != IEEE80211_S_RUN) {
819 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
820 wh, NULL, "wrong state %s",
821 ieee80211_state_name[vap->iv_state]);
822 vap->iv_stats.is_rx_mgtdiscard++;
825 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
826 /* frame must be directed */
827 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
828 wh, NULL, "%s", "not unicast");
829 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */
836 * [tlv] supported rates
837 * [tlv] extended supported rates
839 ssid = rates = xrates = NULL;
840 while (efrm - frm > 1) {
841 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
843 case IEEE80211_ELEMID_SSID:
846 case IEEE80211_ELEMID_RATES:
849 case IEEE80211_ELEMID_XRATES:
855 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
857 IEEE80211_VERIFY_ELEMENT(xrates,
858 IEEE80211_RATE_MAXSIZE - rates[1], return);
859 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
860 IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return);
861 if ((vap->iv_flags & IEEE80211_F_HIDESSID) && ssid[1] == 0) {
862 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
864 "%s", "no ssid with ssid suppression enabled");
865 vap->iv_stats.is_rx_ssidmismatch++; /*XXX*/
869 /* XXX find a better class or define it's own */
870 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
871 "%s", "recv probe req");
873 * Some legacy 11b clients cannot hack a complete
874 * probe response frame. When the request includes
875 * only a bare-bones rate set, communicate this to
878 ieee80211_send_proberesp(vap, wh->i_addr2,
879 is11bclient(rates, xrates) ? IEEE80211_SEND_LEGACY_11B : 0);
882 case IEEE80211_FC0_SUBTYPE_ACTION:
883 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
884 if ((ni == vap->iv_bss) &&
885 !IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
886 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
887 wh, NULL, "%s", "unknown node");
888 vap->iv_stats.is_rx_mgtdiscard++;
889 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
890 !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
891 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
892 wh, NULL, "%s", "not for us");
893 vap->iv_stats.is_rx_mgtdiscard++;
894 } else if (vap->iv_state != IEEE80211_S_RUN) {
895 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
896 wh, NULL, "wrong state %s",
897 ieee80211_state_name[vap->iv_state]);
898 vap->iv_stats.is_rx_mgtdiscard++;
900 if (ieee80211_parse_action(ni, m0) == 0)
901 (void)ic->ic_recv_action(ni, wh, frm, efrm);
905 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
906 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
907 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
908 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
909 case IEEE80211_FC0_SUBTYPE_TIMING_ADV:
910 case IEEE80211_FC0_SUBTYPE_ATIM:
911 case IEEE80211_FC0_SUBTYPE_DISASSOC:
912 case IEEE80211_FC0_SUBTYPE_AUTH:
913 case IEEE80211_FC0_SUBTYPE_DEAUTH:
914 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
915 wh, NULL, "%s", "not handled");
916 vap->iv_stats.is_rx_mgtdiscard++;
920 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
921 wh, "mgt", "subtype 0x%x not handled", subtype);
922 vap->iv_stats.is_rx_badsubtype++;
926 #undef IEEE80211_VERIFY_LENGTH
927 #undef IEEE80211_VERIFY_ELEMENT
930 ahdemo_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0,
931 int subtype, const struct ieee80211_rx_stats *rxs, int rssi, int nf)
933 struct ieee80211vap *vap = ni->ni_vap;
934 struct ieee80211com *ic = ni->ni_ic;
935 struct ieee80211_frame *wh;
938 * Process management frames when scanning; useful for doing
941 if (ic->ic_flags & IEEE80211_F_SCAN)
942 adhoc_recv_mgmt(ni, m0, subtype, rxs, rssi, nf);
944 wh = mtod(m0, struct ieee80211_frame *);
946 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
947 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
948 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
949 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
950 case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
951 case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
952 case IEEE80211_FC0_SUBTYPE_TIMING_ADV:
953 case IEEE80211_FC0_SUBTYPE_BEACON:
954 case IEEE80211_FC0_SUBTYPE_ATIM:
955 case IEEE80211_FC0_SUBTYPE_DISASSOC:
956 case IEEE80211_FC0_SUBTYPE_AUTH:
957 case IEEE80211_FC0_SUBTYPE_DEAUTH:
958 case IEEE80211_FC0_SUBTYPE_ACTION:
959 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
960 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
961 wh, NULL, "%s", "not handled");
962 vap->iv_stats.is_rx_mgtdiscard++;
965 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
966 wh, "mgt", "subtype 0x%x not handled", subtype);
967 vap->iv_stats.is_rx_badsubtype++;
974 adhoc_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
978 case IEEE80211_FC0_SUBTYPE_BAR:
979 ieee80211_recv_bar(ni, m);