2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
34 * IEEE 802.11 Station mode support.
39 #include <sys/param.h>
40 #include <sys/systm.h>
42 #include <sys/malloc.h>
43 #include <sys/kernel.h>
45 #include <sys/socket.h>
46 #include <sys/sockio.h>
47 #include <sys/endian.h>
48 #include <sys/errno.h>
50 #include <sys/sysctl.h>
53 #include <net/if_media.h>
54 #include <net/if_llc.h>
55 #include <net/if_dl.h>
56 #include <net/if_var.h>
57 #include <net/ethernet.h>
61 #include <net80211/ieee80211_var.h>
62 #include <net80211/ieee80211_sta.h>
63 #include <net80211/ieee80211_input.h>
64 #ifdef IEEE80211_SUPPORT_SUPERG
65 #include <net80211/ieee80211_superg.h>
67 #include <net80211/ieee80211_ratectl.h>
68 #include <net80211/ieee80211_sta.h>
69 #include <net80211/ieee80211_vht.h>
71 #define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2)
73 static void sta_vattach(struct ieee80211vap *);
74 static void sta_beacon_miss(struct ieee80211vap *);
75 static int sta_newstate(struct ieee80211vap *, enum ieee80211_state, int);
76 static int sta_input(struct ieee80211_node *, struct mbuf *,
77 const struct ieee80211_rx_stats *, int, int);
78 static void sta_recv_mgmt(struct ieee80211_node *, struct mbuf *,
79 int subtype, const struct ieee80211_rx_stats *, int rssi, int nf);
80 static void sta_recv_ctl(struct ieee80211_node *, struct mbuf *, int subtype);
83 ieee80211_sta_attach(struct ieee80211com *ic)
85 ic->ic_vattach[IEEE80211_M_STA] = sta_vattach;
89 ieee80211_sta_detach(struct ieee80211com *ic)
94 sta_vdetach(struct ieee80211vap *vap)
99 sta_vattach(struct ieee80211vap *vap)
101 vap->iv_newstate = sta_newstate;
102 vap->iv_input = sta_input;
103 vap->iv_recv_mgmt = sta_recv_mgmt;
104 vap->iv_recv_ctl = sta_recv_ctl;
105 vap->iv_opdetach = sta_vdetach;
106 vap->iv_bmiss = sta_beacon_miss;
110 * Handle a beacon miss event. The common code filters out
111 * spurious events that can happen when scanning and/or before
112 * reaching RUN state.
115 sta_beacon_miss(struct ieee80211vap *vap)
117 struct ieee80211com *ic = vap->iv_ic;
119 IEEE80211_LOCK_ASSERT(ic);
121 KASSERT((ic->ic_flags & IEEE80211_F_SCAN) == 0, ("scanning"));
122 KASSERT(vap->iv_state >= IEEE80211_S_RUN,
123 ("wrong state %s", ieee80211_state_name[vap->iv_state]));
125 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
126 "beacon miss, mode %s state %s\n",
127 ieee80211_opmode_name[vap->iv_opmode],
128 ieee80211_state_name[vap->iv_state]);
130 if (vap->iv_state == IEEE80211_S_CSA) {
132 * A Channel Switch is pending; assume we missed the
133 * beacon that would've completed the process and just
134 * force the switch. If we made a mistake we'll not
135 * find the AP on the new channel and fall back to a
138 ieee80211_csa_completeswitch(ic);
141 if (++vap->iv_bmiss_count < vap->iv_bmiss_max) {
143 * Send a directed probe req before falling back to a
144 * scan; if we receive a response ic_bmiss_count will
145 * be reset. Some cards mistakenly report beacon miss
146 * so this avoids the expensive scan if the ap is
149 ieee80211_send_probereq(vap->iv_bss, vap->iv_myaddr,
150 vap->iv_bss->ni_bssid, vap->iv_bss->ni_bssid,
151 vap->iv_bss->ni_essid, vap->iv_bss->ni_esslen);
155 callout_stop(&vap->iv_swbmiss);
156 vap->iv_bmiss_count = 0;
157 vap->iv_stats.is_beacon_miss++;
158 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) {
159 #ifdef IEEE80211_SUPPORT_SUPERG
162 * If we receive a beacon miss interrupt when using
163 * dynamic turbo, attempt to switch modes before
166 if (IEEE80211_ATH_CAP(vap, vap->iv_bss, IEEE80211_NODE_TURBOP))
167 ieee80211_dturbo_switch(vap,
168 ic->ic_bsschan->ic_flags ^ IEEE80211_CHAN_TURBO);
171 * Try to reassociate before scanning for a new ap.
173 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1);
176 * Somebody else is controlling state changes (e.g.
177 * a user-mode app) don't do anything that would
178 * confuse them; just drop into scan mode so they'll
179 * notified of the state change and given control.
181 ieee80211_new_state(vap, IEEE80211_S_SCAN, 0);
186 * Handle deauth with reason. We retry only for
187 * the cases where we might succeed. Otherwise
188 * we downgrade the ap and scan.
191 sta_authretry(struct ieee80211vap *vap, struct ieee80211_node *ni, int reason)
194 case IEEE80211_STATUS_SUCCESS: /* NB: MLME assoc */
195 case IEEE80211_STATUS_TIMEOUT:
196 case IEEE80211_REASON_ASSOC_EXPIRE:
197 case IEEE80211_REASON_NOT_AUTHED:
198 case IEEE80211_REASON_NOT_ASSOCED:
199 case IEEE80211_REASON_ASSOC_LEAVE:
200 case IEEE80211_REASON_ASSOC_NOT_AUTHED:
201 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, 1);
204 ieee80211_scan_assoc_fail(vap, vap->iv_bss->ni_macaddr, reason);
205 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO)
206 ieee80211_check_scan_current(vap);
212 sta_swbmiss_start(struct ieee80211vap *vap)
215 if (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS) {
217 * Start s/w beacon miss timer for devices w/o
218 * hardware support. We fudge a bit here since
219 * we're doing this in software.
221 vap->iv_swbmiss_period = IEEE80211_TU_TO_TICKS(
222 2 * vap->iv_bmissthreshold * vap->iv_bss->ni_intval);
223 vap->iv_swbmiss_count = 0;
224 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period,
225 ieee80211_swbmiss, vap);
230 * IEEE80211_M_STA vap state machine handler.
231 * This routine handles the main states in the 802.11 protocol.
234 sta_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
236 struct ieee80211com *ic = vap->iv_ic;
237 struct ieee80211_node *ni;
238 enum ieee80211_state ostate;
240 IEEE80211_LOCK_ASSERT(ic);
242 ostate = vap->iv_state;
243 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
244 __func__, ieee80211_state_name[ostate],
245 ieee80211_state_name[nstate], arg);
246 vap->iv_state = nstate; /* state transition */
247 callout_stop(&vap->iv_mgtsend); /* XXX callout_drain */
248 if (ostate != IEEE80211_S_SCAN)
249 ieee80211_cancel_scan(vap); /* background scan */
250 ni = vap->iv_bss; /* NB: no reference held */
251 if (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS)
252 callout_stop(&vap->iv_swbmiss);
254 case IEEE80211_S_INIT:
256 case IEEE80211_S_SLEEP:
258 /* XXX driver hook to wakeup the hardware? */
259 case IEEE80211_S_RUN:
260 IEEE80211_SEND_MGMT(ni,
261 IEEE80211_FC0_SUBTYPE_DISASSOC,
262 IEEE80211_REASON_ASSOC_LEAVE);
263 ieee80211_sta_leave(ni);
265 case IEEE80211_S_ASSOC:
266 IEEE80211_SEND_MGMT(ni,
267 IEEE80211_FC0_SUBTYPE_DEAUTH,
268 IEEE80211_REASON_AUTH_LEAVE);
270 case IEEE80211_S_SCAN:
271 ieee80211_cancel_scan(vap);
276 if (ostate != IEEE80211_S_INIT) {
277 /* NB: optimize INIT -> INIT case */
278 ieee80211_reset_bss(vap);
280 if (vap->iv_auth->ia_detach != NULL)
281 vap->iv_auth->ia_detach(vap);
283 case IEEE80211_S_SCAN:
285 case IEEE80211_S_INIT:
287 * Initiate a scan. We can come here as a result
288 * of an IEEE80211_IOC_SCAN_REQ too in which case
289 * the vap will be marked with IEEE80211_FEXT_SCANREQ
290 * and the scan request parameters will be present
291 * in iv_scanreq. Otherwise we do the default.
293 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
294 ieee80211_check_scan(vap,
295 vap->iv_scanreq_flags,
296 vap->iv_scanreq_duration,
297 vap->iv_scanreq_mindwell,
298 vap->iv_scanreq_maxdwell,
299 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
300 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
302 ieee80211_check_scan_current(vap);
304 case IEEE80211_S_SCAN:
305 case IEEE80211_S_AUTH:
306 case IEEE80211_S_ASSOC:
308 * These can happen either because of a timeout
309 * on an assoc/auth response or because of a
310 * change in state that requires a reset. For
311 * the former we're called with a non-zero arg
312 * that is the cause for the failure; pass this
313 * to the scan code so it can update state.
314 * Otherwise trigger a new scan unless we're in
315 * manual roaming mode in which case an application
316 * must issue an explicit scan request.
319 ieee80211_scan_assoc_fail(vap,
320 vap->iv_bss->ni_macaddr, arg);
321 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO)
322 ieee80211_check_scan_current(vap);
324 case IEEE80211_S_SLEEP: /* beacon miss */
326 * XXX if in sleep we need to wakeup the hardware.
329 case IEEE80211_S_RUN: /* beacon miss */
331 * Beacon miss. Notify user space and if not
332 * under control of a user application (roaming
333 * manual) kick off a scan to re-connect.
336 ieee80211_sta_leave(ni);
337 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO)
338 ieee80211_check_scan_current(vap);
344 case IEEE80211_S_AUTH:
346 case IEEE80211_S_INIT:
347 case IEEE80211_S_SCAN:
348 IEEE80211_SEND_MGMT(ni,
349 IEEE80211_FC0_SUBTYPE_AUTH, 1);
351 case IEEE80211_S_AUTH:
352 case IEEE80211_S_ASSOC:
353 switch (arg & 0xff) {
354 case IEEE80211_FC0_SUBTYPE_AUTH:
356 IEEE80211_SEND_MGMT(ni,
357 IEEE80211_FC0_SUBTYPE_AUTH, 2);
359 case IEEE80211_FC0_SUBTYPE_DEAUTH:
360 sta_authretry(vap, ni, arg>>8);
364 case IEEE80211_S_SLEEP:
365 case IEEE80211_S_RUN:
366 switch (arg & 0xff) {
367 case IEEE80211_FC0_SUBTYPE_AUTH:
368 IEEE80211_SEND_MGMT(ni,
369 IEEE80211_FC0_SUBTYPE_AUTH, 2);
370 vap->iv_state = IEEE80211_S_RUN; /* stay RUN */
372 case IEEE80211_FC0_SUBTYPE_DEAUTH:
373 ieee80211_sta_leave(ni);
374 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) {
376 IEEE80211_SEND_MGMT(ni,
377 IEEE80211_FC0_SUBTYPE_AUTH, 1);
386 case IEEE80211_S_ASSOC:
388 case IEEE80211_S_AUTH:
389 case IEEE80211_S_ASSOC:
390 IEEE80211_SEND_MGMT(ni,
391 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0);
393 case IEEE80211_S_SLEEP: /* cannot happen */
394 case IEEE80211_S_RUN:
395 ieee80211_sta_leave(ni);
396 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) {
397 IEEE80211_SEND_MGMT(ni, arg ?
398 IEEE80211_FC0_SUBTYPE_REASSOC_REQ :
399 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0);
406 case IEEE80211_S_RUN:
407 if (vap->iv_flags & IEEE80211_F_WPA) {
408 /* XXX validate prerequisites */
411 case IEEE80211_S_RUN:
412 case IEEE80211_S_CSA:
414 case IEEE80211_S_AUTH: /* when join is done in fw */
415 case IEEE80211_S_ASSOC:
416 #ifdef IEEE80211_DEBUG
417 if (ieee80211_msg_debug(vap)) {
418 ieee80211_note(vap, "%s with %s ssid ",
419 (vap->iv_opmode == IEEE80211_M_STA ?
420 "associated" : "synchronized"),
421 ether_sprintf(ni->ni_bssid));
422 ieee80211_print_essid(vap->iv_bss->ni_essid,
425 printf(" channel %d start %uMb\n",
426 ieee80211_chan2ieee(ic, ic->ic_curchan),
427 IEEE80211_RATE2MBS(ni->ni_txrate));
430 ieee80211_scan_assoc_success(vap, ni->ni_macaddr);
431 ieee80211_notify_node_join(ni,
432 arg == IEEE80211_FC0_SUBTYPE_ASSOC_RESP);
434 case IEEE80211_S_SLEEP:
435 /* Wake up from sleep */
436 vap->iv_sta_ps(vap, 0);
441 ieee80211_sync_curchan(ic);
442 if (ostate != IEEE80211_S_RUN)
443 sta_swbmiss_start(vap);
445 * When 802.1x is not in use mark the port authorized
446 * at this point so traffic can flow.
448 if (ni->ni_authmode != IEEE80211_AUTH_8021X)
449 ieee80211_node_authorize(ni);
451 * Fake association when joining an existing bss.
453 * Don't do this if we're doing SLEEP->RUN.
455 if (ic->ic_newassoc != NULL && ostate != IEEE80211_S_SLEEP)
456 ic->ic_newassoc(vap->iv_bss, (ostate != IEEE80211_S_RUN));
458 case IEEE80211_S_CSA:
459 if (ostate != IEEE80211_S_RUN)
462 case IEEE80211_S_SLEEP:
463 sta_swbmiss_start(vap);
464 vap->iv_sta_ps(vap, 1);
468 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
469 "%s: unexpected state transition %s -> %s\n", __func__,
470 ieee80211_state_name[ostate], ieee80211_state_name[nstate]);
477 * Return non-zero if the frame is an echo of a multicast
478 * frame sent by ourself. The dir is known to be DSTODS.
481 isdstods_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh)
483 #define QWH4(wh) ((const struct ieee80211_qosframe_addr4 *)wh)
484 #define WH4(wh) ((const struct ieee80211_frame_addr4 *)wh)
487 KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode"));
489 if (!IEEE80211_IS_MULTICAST(wh->i_addr3))
491 sa = IEEE80211_QOS_HAS_SEQ(wh) ? QWH4(wh)->i_addr4 : WH4(wh)->i_addr4;
492 return IEEE80211_ADDR_EQ(sa, vap->iv_myaddr);
498 * Return non-zero if the frame is an echo of a multicast
499 * frame sent by ourself. The dir is known to be FROMDS.
502 isfromds_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh)
504 KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode"));
506 if (!IEEE80211_IS_MULTICAST(wh->i_addr1))
508 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
512 * Decide if a received management frame should be
513 * printed when debugging is enabled. This filters some
514 * of the less interesting frames that come frequently
518 doprint(struct ieee80211vap *vap, int subtype)
521 case IEEE80211_FC0_SUBTYPE_BEACON:
522 return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN);
523 case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
530 * Process a received frame. The node associated with the sender
531 * should be supplied. If nothing was found in the node table then
532 * the caller is assumed to supply a reference to iv_bss instead.
533 * The RSSI and a timestamp are also supplied. The RSSI data is used
534 * during AP scanning to select a AP to associate with; it can have
535 * any units so long as values have consistent units and higher values
536 * mean ``better signal''. The receive timestamp is currently not used
537 * by the 802.11 layer.
540 sta_input(struct ieee80211_node *ni, struct mbuf *m,
541 const struct ieee80211_rx_stats *rxs, int rssi, int nf)
543 struct ieee80211vap *vap = ni->ni_vap;
544 struct ieee80211com *ic = ni->ni_ic;
545 struct ifnet *ifp = vap->iv_ifp;
546 struct ieee80211_frame *wh;
547 struct ieee80211_key *key;
548 struct ether_header *eh;
549 int hdrspace, need_tap = 1; /* mbuf need to be tapped. */
550 uint8_t dir, type, subtype, qos;
552 int is_hw_decrypted = 0;
553 int has_decrypted = 0;
556 * Some devices do hardware decryption all the way through
557 * to pretending the frame wasn't encrypted in the first place.
558 * So, tag it appropriately so it isn't discarded inappropriately.
560 if ((rxs != NULL) && (rxs->c_pktflags & IEEE80211_RX_F_DECRYPTED))
563 if (m->m_flags & M_AMPDU_MPDU) {
565 * Fastpath for A-MPDU reorder q resubmission. Frames
566 * w/ M_AMPDU_MPDU marked have already passed through
567 * here but were received out of order and been held on
568 * the reorder queue. When resubmitted they are marked
569 * with the M_AMPDU_MPDU flag and we can bypass most of
570 * the normal processing.
572 wh = mtod(m, struct ieee80211_frame *);
573 type = IEEE80211_FC0_TYPE_DATA;
574 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
575 subtype = IEEE80211_FC0_SUBTYPE_QOS;
576 hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */
580 KASSERT(ni != NULL, ("null node"));
581 ni->ni_inact = ni->ni_inact_reload;
583 type = -1; /* undefined */
585 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
586 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
587 ni->ni_macaddr, NULL,
588 "too short (1): len %u", m->m_pkthdr.len);
589 vap->iv_stats.is_rx_tooshort++;
593 * Bit of a cheat here, we use a pointer for a 3-address
594 * frame format but don't reference fields past outside
595 * ieee80211_frame_min w/o first validating the data is
598 wh = mtod(m, struct ieee80211_frame *);
600 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
601 IEEE80211_FC0_VERSION_0) {
602 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
603 ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x",
604 wh->i_fc[0], wh->i_fc[1]);
605 vap->iv_stats.is_rx_badversion++;
609 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
610 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
611 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
612 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
614 if (!IEEE80211_ADDR_EQ(bssid, ni->ni_bssid)) {
615 /* not interested in */
616 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
617 bssid, NULL, "%s", "not to bss");
618 vap->iv_stats.is_rx_wrongbss++;
623 * Some devices may be in a promiscuous mode
624 * where they receive frames for multiple station
627 * If we receive a data frame that isn't
628 * destined to our VAP MAC, drop it.
630 * XXX TODO: This is only enforced when not scanning;
631 * XXX it assumes a software-driven scan will put the NIC
632 * XXX into a "no data frames" mode before setting this
633 * XXX flag. Otherwise it may be possible that we'll still
634 * XXX process data frames whilst scanning.
636 if ((! IEEE80211_IS_MULTICAST(wh->i_addr1))
637 && (! IEEE80211_ADDR_EQ(wh->i_addr1, IF_LLADDR(ifp)))) {
638 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
639 bssid, NULL, "not to cur sta: lladdr=%6D, addr1=%6D",
640 IF_LLADDR(ifp), ":", wh->i_addr1, ":");
641 vap->iv_stats.is_rx_wrongbss++;
645 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
647 if ( IEEE80211_HAS_SEQ(type, subtype) &&
648 !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
649 uint8_t tid = ieee80211_gettid(wh);
650 if (IEEE80211_QOS_HAS_SEQ(wh) &&
651 TID_TO_WME_AC(tid) >= WME_AC_VI)
652 ic->ic_wme.wme_hipri_traffic++;
653 if (! ieee80211_check_rxseq(ni, wh, bssid, rxs))
659 case IEEE80211_FC0_TYPE_DATA:
660 hdrspace = ieee80211_hdrspace(ic, wh);
661 if (m->m_len < hdrspace &&
662 (m = m_pullup(m, hdrspace)) == NULL) {
663 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
664 ni->ni_macaddr, NULL,
665 "data too short: expecting %u", hdrspace);
666 vap->iv_stats.is_rx_tooshort++;
670 * Handle A-MPDU re-ordering. If the frame is to be
671 * processed directly then ieee80211_ampdu_reorder
672 * will return 0; otherwise it has consumed the mbuf
673 * and we should do nothing more with it.
675 if ((m->m_flags & M_AMPDU) &&
676 (dir == IEEE80211_FC1_DIR_FROMDS ||
677 dir == IEEE80211_FC1_DIR_DSTODS) &&
678 ieee80211_ampdu_reorder(ni, m, rxs) != 0) {
683 if (dir == IEEE80211_FC1_DIR_FROMDS) {
684 if ((ifp->if_flags & IFF_SIMPLEX) &&
685 isfromds_mcastecho(vap, wh)) {
687 * In IEEE802.11 network, multicast
688 * packets sent from "me" are broadcast
689 * from the AP; silently discard for
692 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
693 wh, "data", "%s", "multicast echo");
694 vap->iv_stats.is_rx_mcastecho++;
697 if ((vap->iv_flags & IEEE80211_F_DWDS) &&
698 IEEE80211_IS_MULTICAST(wh->i_addr1)) {
700 * DWDS sta's must drop 3-address mcast frames
701 * as they will be sent separately as a 4-addr
702 * frame. Accepting the 3-addr frame will
703 * confuse the bridge into thinking the sending
704 * sta is located at the end of WDS link.
706 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh,
707 "3-address data", "%s", "DWDS enabled");
708 vap->iv_stats.is_rx_mcastecho++;
711 } else if (dir == IEEE80211_FC1_DIR_DSTODS) {
712 if ((vap->iv_flags & IEEE80211_F_DWDS) == 0) {
713 IEEE80211_DISCARD(vap,
714 IEEE80211_MSG_INPUT, wh, "4-address data",
715 "%s", "DWDS not enabled");
716 vap->iv_stats.is_rx_wrongdir++;
719 if ((ifp->if_flags & IFF_SIMPLEX) &&
720 isdstods_mcastecho(vap, wh)) {
722 * In IEEE802.11 network, multicast
723 * packets sent from "me" are broadcast
724 * from the AP; silently discard for
727 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh,
728 "4-address data", "%s", "multicast echo");
729 vap->iv_stats.is_rx_mcastecho++;
733 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh,
734 "data", "incorrect dir 0x%x", dir);
735 vap->iv_stats.is_rx_wrongdir++;
740 * Handle privacy requirements for hardware decryption
743 * For those devices, a handful of things happen.
745 * + If IV has been stripped, then we can't run
746 * ieee80211_crypto_decap() - none of the key
747 * + If MIC has been stripped, we can't validate
749 * + If MIC fails, then we need to communicate a
750 * MIC failure up to the stack - but we don't know
751 * which key was used.
755 * Handle privacy requirements. Note that we
756 * must not be preempted from here until after
757 * we (potentially) call ieee80211_crypto_demic;
758 * otherwise we may violate assumptions in the
759 * crypto cipher modules used to do delayed update
760 * of replay sequence numbers.
762 if (is_hw_decrypted || wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
763 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
765 * Discard encrypted frames when privacy is off.
767 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
768 wh, "WEP", "%s", "PRIVACY off");
769 vap->iv_stats.is_rx_noprivacy++;
770 IEEE80211_NODE_STAT(ni, rx_noprivacy);
773 if (ieee80211_crypto_decap(ni, m, hdrspace, &key) == 0) {
774 /* NB: stats+msgs handled in crypto_decap */
775 IEEE80211_NODE_STAT(ni, rx_wepfail);
778 wh = mtod(m, struct ieee80211_frame *);
779 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED;
782 /* XXX M_WEP and IEEE80211_F_PRIVACY */
787 * Save QoS bits for use below--before we strip the header.
789 if (subtype == IEEE80211_FC0_SUBTYPE_QOS)
790 qos = ieee80211_getqos(wh)[0];
795 * Next up, any fragmentation.
797 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
798 m = ieee80211_defrag(ni, m, hdrspace);
800 /* Fragment dropped or frame not complete yet */
804 wh = NULL; /* no longer valid, catch any uses */
807 * Next strip any MSDU crypto bits.
809 * Note: we can't do MIC stripping/verification if the
810 * upper layer has stripped it. We have to check MIC
811 * ourselves. So, key may be NULL, but we have to check
814 if (!ieee80211_crypto_demic(vap, key, m, 0)) {
815 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
816 ni->ni_macaddr, "data", "%s", "demic error");
817 vap->iv_stats.is_rx_demicfail++;
818 IEEE80211_NODE_STAT(ni, rx_demicfail);
822 /* copy to listener after decrypt */
823 if (ieee80211_radiotap_active_vap(vap))
824 ieee80211_radiotap_rx(vap, m);
828 * Finally, strip the 802.11 header.
830 m = ieee80211_decap(vap, m, hdrspace);
832 /* XXX mask bit to check for both */
833 /* don't count Null data frames as errors */
834 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
835 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
837 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
838 ni->ni_macaddr, "data", "%s", "decap error");
839 vap->iv_stats.is_rx_decap++;
840 IEEE80211_NODE_STAT(ni, rx_decap);
843 eh = mtod(m, struct ether_header *);
844 if (!ieee80211_node_is_authorized(ni)) {
846 * Deny any non-PAE frames received prior to
847 * authorization. For open/shared-key
848 * authentication the port is mark authorized
849 * after authentication completes. For 802.1x
850 * the port is not marked authorized by the
851 * authenticator until the handshake has completed.
853 if (eh->ether_type != htons(ETHERTYPE_PAE)) {
854 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
855 eh->ether_shost, "data",
856 "unauthorized port: ether type 0x%x len %u",
857 eh->ether_type, m->m_pkthdr.len);
858 vap->iv_stats.is_rx_unauth++;
859 IEEE80211_NODE_STAT(ni, rx_unauth);
864 * When denying unencrypted frames, discard
865 * any non-PAE frames received without encryption.
867 if ((vap->iv_flags & IEEE80211_F_DROPUNENC) &&
868 ((has_decrypted == 0) && (m->m_flags & M_WEP) == 0) &&
869 (is_hw_decrypted == 0) &&
870 eh->ether_type != htons(ETHERTYPE_PAE)) {
872 * Drop unencrypted frames.
874 vap->iv_stats.is_rx_unencrypted++;
875 IEEE80211_NODE_STAT(ni, rx_unencrypted);
879 /* XXX require HT? */
880 if (qos & IEEE80211_QOS_AMSDU) {
881 m = ieee80211_decap_amsdu(ni, m);
883 return IEEE80211_FC0_TYPE_DATA;
885 #ifdef IEEE80211_SUPPORT_SUPERG
886 m = ieee80211_decap_fastframe(vap, ni, m);
888 return IEEE80211_FC0_TYPE_DATA;
891 ieee80211_deliver_data(vap, ni, m);
892 return IEEE80211_FC0_TYPE_DATA;
894 case IEEE80211_FC0_TYPE_MGT:
895 vap->iv_stats.is_rx_mgmt++;
896 IEEE80211_NODE_STAT(ni, rx_mgmt);
897 if (dir != IEEE80211_FC1_DIR_NODS) {
898 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
899 wh, "data", "incorrect dir 0x%x", dir);
900 vap->iv_stats.is_rx_wrongdir++;
903 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
904 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
905 ni->ni_macaddr, "mgt", "too short: len %u",
907 vap->iv_stats.is_rx_tooshort++;
910 #ifdef IEEE80211_DEBUG
911 if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) ||
912 ieee80211_msg_dumppkts(vap)) {
913 if_printf(ifp, "received %s from %s rssi %d\n",
914 ieee80211_mgt_subtype_name(subtype),
915 ether_sprintf(wh->i_addr2), rssi);
920 * Note: See above for hardware offload privacy requirements.
921 * It also applies here.
925 * Again, having encrypted flag set check would be good, but
926 * then we have to also handle crypto_decap() like above.
928 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
929 if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) {
931 * Only shared key auth frames with a challenge
932 * should be encrypted, discard all others.
934 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
935 wh, ieee80211_mgt_subtype_name(subtype),
936 "%s", "WEP set but not permitted");
937 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
940 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
942 * Discard encrypted frames when privacy is off.
944 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
945 wh, "mgt", "%s", "WEP set but PRIVACY off");
946 vap->iv_stats.is_rx_noprivacy++;
949 hdrspace = ieee80211_hdrspace(ic, wh);
952 * Again, if IV/MIC was stripped, then this whole
953 * setup will fail. That's going to need some poking.
955 if (ieee80211_crypto_decap(ni, m, hdrspace, &key) == 0) {
956 /* NB: stats+msgs handled in crypto_decap */
960 wh = mtod(m, struct ieee80211_frame *);
961 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED;
963 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf);
966 case IEEE80211_FC0_TYPE_CTL:
967 vap->iv_stats.is_rx_ctl++;
968 IEEE80211_NODE_STAT(ni, rx_ctrl);
969 vap->iv_recv_ctl(ni, m, subtype);
973 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
974 wh, NULL, "bad frame type 0x%x", type);
975 /* should not come here */
979 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
982 if (need_tap && ieee80211_radiotap_active_vap(vap))
983 ieee80211_radiotap_rx(vap, m);
990 sta_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh,
991 int rssi, int nf, uint16_t seq, uint16_t status)
993 struct ieee80211vap *vap = ni->ni_vap;
995 if (ni->ni_authmode == IEEE80211_AUTH_SHARED) {
996 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
997 ni->ni_macaddr, "open auth",
998 "bad sta auth mode %u", ni->ni_authmode);
999 vap->iv_stats.is_rx_bad_auth++; /* XXX */
1002 if (vap->iv_state != IEEE80211_S_AUTH ||
1003 seq != IEEE80211_AUTH_OPEN_RESPONSE) {
1004 vap->iv_stats.is_rx_bad_auth++;
1008 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH,
1009 ni, "open auth failed (reason %d)", status);
1010 vap->iv_stats.is_rx_auth_fail++;
1011 vap->iv_stats.is_rx_authfail_code = status;
1012 ieee80211_new_state(vap, IEEE80211_S_SCAN,
1013 IEEE80211_SCAN_FAIL_STATUS);
1015 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0);
1019 sta_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh,
1020 uint8_t *frm, uint8_t *efrm, int rssi, int nf,
1021 uint16_t seq, uint16_t status)
1023 struct ieee80211vap *vap = ni->ni_vap;
1027 * NB: this can happen as we allow pre-shared key
1028 * authentication to be enabled w/o wep being turned
1029 * on so that configuration of these can be done
1030 * in any order. It may be better to enforce the
1031 * ordering in which case this check would just be
1032 * for sanity/consistency.
1034 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
1035 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1036 ni->ni_macaddr, "shared key auth",
1037 "%s", " PRIVACY is disabled");
1041 * Pre-shared key authentication is evil; accept
1042 * it only if explicitly configured (it is supported
1043 * mainly for compatibility with clients like OS X).
1045 if (ni->ni_authmode != IEEE80211_AUTH_AUTO &&
1046 ni->ni_authmode != IEEE80211_AUTH_SHARED) {
1047 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1048 ni->ni_macaddr, "shared key auth",
1049 "bad sta auth mode %u", ni->ni_authmode);
1050 vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */
1055 if (frm + 1 < efrm) {
1056 if ((frm[1] + 2) > (efrm - frm)) {
1057 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1058 ni->ni_macaddr, "shared key auth",
1059 "ie %d/%d too long",
1060 frm[0], (frm[1] + 2) - (efrm - frm));
1061 vap->iv_stats.is_rx_bad_auth++;
1064 if (*frm == IEEE80211_ELEMID_CHALLENGE)
1069 case IEEE80211_AUTH_SHARED_CHALLENGE:
1070 case IEEE80211_AUTH_SHARED_RESPONSE:
1071 if (challenge == NULL) {
1072 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1073 ni->ni_macaddr, "shared key auth",
1074 "%s", "no challenge");
1075 vap->iv_stats.is_rx_bad_auth++;
1078 if (challenge[1] != IEEE80211_CHALLENGE_LEN) {
1079 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1080 ni->ni_macaddr, "shared key auth",
1081 "bad challenge len %d", challenge[1]);
1082 vap->iv_stats.is_rx_bad_auth++;
1088 if (vap->iv_state != IEEE80211_S_AUTH)
1091 case IEEE80211_AUTH_SHARED_PASS:
1092 if (ni->ni_challenge != NULL) {
1093 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE);
1094 ni->ni_challenge = NULL;
1097 IEEE80211_NOTE_FRAME(vap,
1098 IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, wh,
1099 "shared key auth failed (reason %d)", status);
1100 vap->iv_stats.is_rx_auth_fail++;
1101 vap->iv_stats.is_rx_authfail_code = status;
1104 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0);
1106 case IEEE80211_AUTH_SHARED_CHALLENGE:
1107 if (!ieee80211_alloc_challenge(ni))
1109 /* XXX could optimize by passing recvd challenge */
1110 memcpy(ni->ni_challenge, &challenge[2], challenge[1]);
1111 IEEE80211_SEND_MGMT(ni,
1112 IEEE80211_FC0_SUBTYPE_AUTH, seq + 1);
1115 IEEE80211_DISCARD(vap, IEEE80211_MSG_AUTH,
1116 wh, "shared key auth", "bad seq %d", seq);
1117 vap->iv_stats.is_rx_bad_auth++;
1123 * Kick the state machine. This short-circuits
1124 * using the mgt frame timeout to trigger the
1127 if (vap->iv_state == IEEE80211_S_AUTH)
1128 ieee80211_new_state(vap, IEEE80211_S_SCAN,
1129 IEEE80211_SCAN_FAIL_STATUS);
1133 * Parse the WME IE for QoS and U-APSD information.
1135 * Returns -1 if the IE isn't found, 1 if it's found.
1138 ieee80211_parse_wmeie(uint8_t *frm, const struct ieee80211_frame *wh,
1139 struct ieee80211_node *ni)
1145 if (len < sizeof(struct ieee80211_wme_param)-2) {
1146 IEEE80211_DISCARD_IE(ni->ni_vap,
1147 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WME,
1148 wh, "WME", "too short, len %u", len);
1152 ni->ni_uapsd = frm[WME_CAPINFO_IE_OFFSET];
1154 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_POWER | IEEE80211_MSG_ASSOC,
1155 ni, "U-APSD settings from STA: 0x%02x", ni->ni_uapsd);
1161 ieee80211_parse_wmeparams(struct ieee80211vap *vap, uint8_t *frm,
1162 const struct ieee80211_frame *wh, uint8_t *qosinfo)
1164 #define MS(_v, _f) (((_v) & _f) >> _f##_S)
1165 struct ieee80211_wme_state *wme = &vap->iv_ic->ic_wme;
1166 u_int len = frm[1], qosinfo_count;
1171 if (len < sizeof(struct ieee80211_wme_param)-2) {
1172 IEEE80211_DISCARD_IE(vap,
1173 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WME,
1174 wh, "WME", "too short, len %u", len);
1177 *qosinfo = frm[__offsetof(struct ieee80211_wme_param, param_qosInfo)];
1178 qosinfo_count = *qosinfo & WME_QOSINFO_COUNT;
1180 /* XXX do proper check for wraparound */
1181 if (qosinfo_count == wme->wme_wmeChanParams.cap_info)
1183 frm += __offsetof(struct ieee80211_wme_param, params_acParams);
1184 for (i = 0; i < WME_NUM_AC; i++) {
1185 struct wmeParams *wmep =
1186 &wme->wme_wmeChanParams.cap_wmeParams[i];
1187 /* NB: ACI not used */
1188 wmep->wmep_acm = MS(frm[0], WME_PARAM_ACM);
1189 wmep->wmep_aifsn = MS(frm[0], WME_PARAM_AIFSN);
1190 wmep->wmep_logcwmin = MS(frm[1], WME_PARAM_LOGCWMIN);
1191 wmep->wmep_logcwmax = MS(frm[1], WME_PARAM_LOGCWMAX);
1192 wmep->wmep_txopLimit = le16dec(frm+2);
1193 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1194 "%s: WME: %d: acm=%d aifsn=%d logcwmin=%d logcwmax=%d txopLimit=%d\n",
1199 wmep->wmep_logcwmin,
1200 wmep->wmep_logcwmax,
1201 wmep->wmep_txopLimit);
1204 wme->wme_wmeChanParams.cap_info = qosinfo_count;
1210 * Process 11h Channel Switch Announcement (CSA) ie. If this
1211 * is the first CSA then initiate the switch. Otherwise we
1212 * track state and trigger completion and/or cancel of the switch.
1213 * XXX should be public for IBSS use
1216 ieee80211_parse_csaparams(struct ieee80211vap *vap, uint8_t *frm,
1217 const struct ieee80211_frame *wh)
1219 struct ieee80211com *ic = vap->iv_ic;
1220 const struct ieee80211_csa_ie *csa =
1221 (const struct ieee80211_csa_ie *) frm;
1223 KASSERT(vap->iv_state >= IEEE80211_S_RUN,
1224 ("state %s", ieee80211_state_name[vap->iv_state]));
1226 if (csa->csa_mode > 1) {
1227 IEEE80211_DISCARD_IE(vap,
1228 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH,
1229 wh, "CSA", "invalid mode %u", csa->csa_mode);
1233 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) {
1235 * Convert the channel number to a channel reference. We
1236 * try first to preserve turbo attribute of the current
1237 * channel then fallback. Note this will not work if the
1238 * CSA specifies a channel that requires a band switch (e.g.
1239 * 11a => 11g). This is intentional as 11h is defined only
1240 * for 5GHz/11a and because the switch does not involve a
1241 * reassociation, protocol state (capabilities, negotated
1242 * rates, etc) may/will be wrong.
1244 struct ieee80211_channel *c =
1245 ieee80211_find_channel_byieee(ic, csa->csa_newchan,
1246 (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALLTURBO));
1248 c = ieee80211_find_channel_byieee(ic,
1250 (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALL));
1252 IEEE80211_DISCARD_IE(vap,
1253 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH,
1254 wh, "CSA", "invalid channel %u",
1259 #if IEEE80211_CSA_COUNT_MIN > 0
1260 if (csa->csa_count < IEEE80211_CSA_COUNT_MIN) {
1262 * Require at least IEEE80211_CSA_COUNT_MIN count to
1263 * reduce the risk of being redirected by a fabricated
1264 * CSA. If a valid CSA is dropped we'll still get a
1265 * beacon miss when the AP leaves the channel so we'll
1266 * eventually follow to the new channel.
1268 * NOTE: this violates the 11h spec that states that
1269 * count may be any value and if 0 then a switch
1270 * should happen asap.
1272 IEEE80211_DISCARD_IE(vap,
1273 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH,
1274 wh, "CSA", "count %u too small, must be >= %u",
1275 csa->csa_count, IEEE80211_CSA_COUNT_MIN);
1279 ieee80211_csa_startswitch(ic, c, csa->csa_mode, csa->csa_count);
1282 * Validate this ie against the initial CSA. We require
1283 * mode and channel not change and the count must be
1284 * monotonically decreasing. This may be pointless and
1285 * canceling the switch as a result may be too paranoid but
1286 * in the worst case if we drop out of CSA because of this
1287 * and the AP does move then we'll just end up taking a
1288 * beacon miss and scan to find the AP.
1290 * XXX may want <= on count as we also process ProbeResp
1291 * frames and those may come in w/ the same count as the
1292 * previous beacon; but doing so leaves us open to a stuck
1293 * count until we add a dead-man timer
1295 if (!(csa->csa_count < ic->ic_csa_count &&
1296 csa->csa_mode == ic->ic_csa_mode &&
1297 csa->csa_newchan == ieee80211_chan2ieee(ic, ic->ic_csa_newchan))) {
1298 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_DOTH, wh,
1299 "CSA ie mismatch, initial ie <%d,%d,%d>, "
1300 "this ie <%d,%d,%d>", ic->ic_csa_mode,
1301 ic->ic_csa_newchan, ic->ic_csa_count,
1302 csa->csa_mode, csa->csa_newchan, csa->csa_count);
1303 ieee80211_csa_cancelswitch(ic);
1305 if (csa->csa_count <= 1)
1306 ieee80211_csa_completeswitch(ic);
1308 ic->ic_csa_count = csa->csa_count;
1312 IEEE80211_UNLOCK(ic);
1316 * Return non-zero if a background scan may be continued:
1317 * o bg scan is active
1318 * o no channel switch is pending
1319 * o there has not been any traffic recently
1320 * o no full-offload scan support (no need for explicitly continuing scan then)
1322 * Note we do not check if there is an administrative enable;
1323 * this is only done to start the scan. We assume that any
1324 * change in state will be accompanied by a request to cancel
1325 * active scans which will otherwise cause this test to fail.
1328 contbgscan(struct ieee80211vap *vap)
1330 struct ieee80211com *ic = vap->iv_ic;
1332 return ((ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN) &&
1333 (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 &&
1334 !(vap->iv_flags_ext & IEEE80211_FEXT_SCAN_OFFLOAD) &&
1335 vap->iv_state == IEEE80211_S_RUN && /* XXX? */
1336 ieee80211_time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle));
1340 * Return non-zero if a backgrond scan may be started:
1341 * o bg scanning is administratively enabled
1342 * o no channel switch is pending
1343 * o we are not boosted on a dynamic turbo channel
1344 * o there has not been a scan recently
1345 * o there has not been any traffic recently (don't check if full-offload scan)
1348 startbgscan(struct ieee80211vap *vap)
1350 struct ieee80211com *ic = vap->iv_ic;
1352 return ((vap->iv_flags & IEEE80211_F_BGSCAN) &&
1353 (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 &&
1354 #ifdef IEEE80211_SUPPORT_SUPERG
1355 !IEEE80211_IS_CHAN_DTURBO(ic->ic_curchan) &&
1357 ieee80211_time_after(ticks, ic->ic_lastscan + vap->iv_bgscanintvl) &&
1358 ((vap->iv_flags_ext & IEEE80211_FEXT_SCAN_OFFLOAD) ||
1359 ieee80211_time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)));
1364 * Compare two quiet IEs and return if they are equivalent.
1366 * The tbttcount isnt checked - that's not part of the configuration.
1369 compare_quiet_ie(const struct ieee80211_quiet_ie *q1,
1370 const struct ieee80211_quiet_ie *q2)
1373 if (q1->period != q2->period)
1375 if (le16dec(&q1->duration) != le16dec(&q2->duration))
1377 if (le16dec(&q1->offset) != le16dec(&q2->offset))
1384 sta_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
1385 const struct ieee80211_rx_stats *rxs,
1388 #define ISREASSOC(_st) ((_st) == IEEE80211_FC0_SUBTYPE_REASSOC_RESP)
1389 struct ieee80211vap *vap = ni->ni_vap;
1390 struct ieee80211com *ic = ni->ni_ic;
1391 struct ieee80211_channel *rxchan = ic->ic_curchan;
1392 struct ieee80211_frame *wh;
1393 int ht_state_change = 0, do_ht = 0;
1394 uint8_t *frm, *efrm;
1395 uint8_t *rates, *xrates, *wme, *htcap, *htinfo;
1396 uint8_t *vhtcap, *vhtopmode;
1400 wh = mtod(m0, struct ieee80211_frame *);
1401 frm = (uint8_t *)&wh[1];
1402 efrm = mtod(m0, uint8_t *) + m0->m_len;
1404 case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1405 case IEEE80211_FC0_SUBTYPE_BEACON: {
1406 struct ieee80211_scanparams scan;
1407 struct ieee80211_channel *c;
1409 * We process beacon/probe response frames:
1410 * o when scanning, or
1411 * o station mode when associated (to collect state
1412 * updates such as 802.11g slot time)
1413 * Frames otherwise received are discarded.
1415 if (!((ic->ic_flags & IEEE80211_F_SCAN) || ni->ni_associd)) {
1416 vap->iv_stats.is_rx_mgtdiscard++;
1420 /* Override RX channel as appropriate */
1422 c = ieee80211_lookup_channel_rxstatus(vap, rxs);
1427 /* XXX probe response in sta mode when !scanning? */
1428 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0) {
1429 if (! (ic->ic_flags & IEEE80211_F_SCAN))
1430 vap->iv_stats.is_beacon_bad++;
1435 * Count frame now that we know it's to be processed.
1437 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1438 vap->iv_stats.is_rx_beacon++; /* XXX remove */
1439 IEEE80211_NODE_STAT(ni, rx_beacons);
1441 IEEE80211_NODE_STAT(ni, rx_proberesp);
1443 * When operating in station mode, check for state updates.
1444 * Be careful to ignore beacons received while doing a
1445 * background scan. We consider only 11g/WMM stuff right now.
1447 if (ni->ni_associd != 0 &&
1448 ((ic->ic_flags & IEEE80211_F_SCAN) == 0 ||
1449 IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_bssid))) {
1450 /* record tsf of last beacon */
1451 memcpy(ni->ni_tstamp.data, scan.tstamp,
1452 sizeof(ni->ni_tstamp));
1453 /* count beacon frame for s/w bmiss handling */
1454 vap->iv_swbmiss_count++;
1455 vap->iv_bmiss_count = 0;
1456 if (ni->ni_erp != scan.erp) {
1457 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC,
1459 "erp change: was 0x%x, now 0x%x",
1460 ni->ni_erp, scan.erp);
1461 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
1462 (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION))
1463 vap->iv_flags |= IEEE80211_F_USEPROT;
1465 vap->iv_flags &= ~IEEE80211_F_USEPROT;
1466 ni->ni_erp = scan.erp;
1468 /* driver notification */
1469 ieee80211_vap_update_erp_protmode(vap);
1471 if ((ni->ni_capinfo ^ scan.capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME) {
1472 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC,
1474 "capabilities change: was 0x%x, now 0x%x",
1475 ni->ni_capinfo, scan.capinfo);
1477 * NB: we assume short preamble doesn't
1478 * change dynamically
1480 ieee80211_vap_set_shortslottime(vap,
1481 IEEE80211_IS_CHAN_A(ic->ic_bsschan) ||
1482 (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME));
1483 ni->ni_capinfo = (ni->ni_capinfo &~ IEEE80211_CAPINFO_SHORT_SLOTTIME)
1484 | (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME);
1487 if (scan.wme != NULL &&
1488 (ni->ni_flags & IEEE80211_NODE_QOS)) {
1490 if ((_retval = ieee80211_parse_wmeparams(vap,
1491 scan.wme, wh, &qosinfo)) >= 0) {
1492 if (qosinfo & WME_CAPINFO_UAPSD_EN)
1494 IEEE80211_NODE_UAPSD;
1496 ieee80211_wme_updateparams(vap);
1499 ni->ni_flags &= ~IEEE80211_NODE_UAPSD;
1500 #ifdef IEEE80211_SUPPORT_SUPERG
1501 if (scan.ath != NULL)
1502 ieee80211_parse_athparams(ni, scan.ath, wh);
1504 if (scan.htcap != NULL && scan.htinfo != NULL &&
1505 (vap->iv_flags_ht & IEEE80211_FHT_HT)) {
1506 /* XXX state changes? */
1507 ieee80211_ht_updateparams(ni,
1508 scan.htcap, scan.htinfo);
1511 if (scan.vhtcap != NULL && scan.vhtopmode != NULL &&
1512 (vap->iv_flags_vht & IEEE80211_FVHT_VHT)) {
1513 /* XXX state changes? */
1514 ieee80211_vht_updateparams(ni,
1515 scan.vhtcap, scan.vhtopmode);
1519 if (ieee80211_ht_updateparams_final(ni,
1520 scan.htcap, scan.htinfo))
1521 ht_state_change = 1;
1525 * If we have a quiet time IE then report it up to
1528 * Otherwise, inform the driver that the quiet time
1529 * IE has disappeared - only do that once rather than
1530 * spamming it each time.
1533 ic->ic_set_quiet(ni, scan.quiet);
1534 ni->ni_quiet_ie_set = 1;
1535 memcpy(&ni->ni_quiet_ie, scan.quiet,
1536 sizeof(struct ieee80211_quiet_ie));
1538 if (ni->ni_quiet_ie_set == 1)
1539 ic->ic_set_quiet(ni, NULL);
1540 ni->ni_quiet_ie_set = 0;
1541 bzero(&ni->ni_quiet_ie,
1542 sizeof(struct ieee80211_quiet_ie));
1545 if (scan.tim != NULL) {
1546 struct ieee80211_tim_ie *tim =
1547 (struct ieee80211_tim_ie *) scan.tim;
1549 * XXX Check/debug this code; see if it's about
1550 * the right time to force the VAP awake if we
1551 * receive a frame destined for us?
1553 int aid = IEEE80211_AID(ni->ni_associd);
1554 int ix = aid / NBBY;
1555 int min = tim->tim_bitctl &~ 1;
1556 int max = tim->tim_len + min - 4;
1557 int tim_ucast = 0, tim_mcast = 0;
1560 * Only do this for unicast traffic in the TIM
1561 * The multicast traffic notification for
1562 * the scan notification stuff should occur
1565 if (min <= ix && ix <= max &&
1566 isset(tim->tim_bitmap - min, aid)) {
1571 * Do a separate notification
1572 * for the multicast bit being set.
1574 if (tim->tim_bitctl & 1) {
1579 * If the TIM indicates there's traffic for
1580 * us then get us out of STA mode powersave.
1582 if (tim_ucast == 1) {
1585 * Wake us out of SLEEP state if we're
1586 * in it; and if we're doing bgscan
1587 * then wake us out of STA powersave.
1589 ieee80211_sta_tim_notify(vap, 1);
1592 * This is preventing us from
1593 * continuing a bgscan; because it
1594 * tricks the contbgscan()
1595 * routine to think there's always
1598 * I think we need both an RX and
1599 * TX ic_lastdata field.
1601 ic->ic_lastdata = ticks;
1604 ni->ni_dtim_count = tim->tim_count;
1605 ni->ni_dtim_period = tim->tim_period;
1607 if (scan.csa != NULL &&
1608 (vap->iv_flags & IEEE80211_F_DOTH))
1609 ieee80211_parse_csaparams(vap, scan.csa, wh);
1610 else if (ic->ic_flags & IEEE80211_F_CSAPENDING) {
1612 * No CSA ie or 11h disabled, but a channel
1613 * switch is pending; drop out so we aren't
1614 * stuck in CSA state. If the AP really is
1615 * moving we'll get a beacon miss and scan.
1618 ieee80211_csa_cancelswitch(ic);
1619 IEEE80211_UNLOCK(ic);
1622 * If scanning, pass the info to the scan module.
1623 * Otherwise, check if it's the right time to do
1624 * a background scan. Background scanning must
1625 * be enabled and we must not be operating in the
1626 * turbo phase of dynamic turbo mode. Then,
1627 * it's been a while since the last background
1628 * scan and if no data frames have come through
1629 * recently, kick off a scan. Note that this
1630 * is the mechanism by which a background scan
1631 * is started _and_ continued each time we
1632 * return on-channel to receive a beacon from
1635 if (ic->ic_flags & IEEE80211_F_SCAN) {
1636 ieee80211_add_scan(vap, rxchan,
1637 &scan, wh, subtype, rssi, nf);
1638 } else if (contbgscan(vap)) {
1639 ieee80211_bg_scan(vap, 0);
1640 } else if (startbgscan(vap)) {
1641 vap->iv_stats.is_scan_bg++;
1643 /* wakeup if we are sleeing */
1644 ieee80211_set_pwrsave(vap, 0);
1646 ieee80211_bg_scan(vap, 0);
1650 * Put the station to sleep if we haven't seen
1651 * traffic in a while.
1654 ieee80211_sta_ps_timer_check(vap);
1655 IEEE80211_UNLOCK(ic);
1658 * If we've had a channel width change (eg HT20<->HT40)
1659 * then schedule a delayed driver notification.
1661 if (ht_state_change)
1662 ieee80211_update_chw(ic);
1666 * If scanning, just pass information to the scan module.
1668 if (ic->ic_flags & IEEE80211_F_SCAN) {
1669 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
1671 * Actively scanning a channel marked passive;
1672 * send a probe request now that we know there
1673 * is 802.11 traffic present.
1675 * XXX check if the beacon we recv'd gives
1676 * us what we need and suppress the probe req
1678 ieee80211_probe_curchan(vap, 1);
1679 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1681 ieee80211_add_scan(vap, rxchan, &scan, wh,
1688 case IEEE80211_FC0_SUBTYPE_AUTH: {
1689 uint16_t algo, seq, status;
1697 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return);
1698 algo = le16toh(*(uint16_t *)frm);
1699 seq = le16toh(*(uint16_t *)(frm + 2));
1700 status = le16toh(*(uint16_t *)(frm + 4));
1701 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2,
1702 "recv auth frame with algorithm %d seq %d", algo, seq);
1704 if (vap->iv_flags & IEEE80211_F_COUNTERM) {
1705 IEEE80211_DISCARD(vap,
1706 IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO,
1707 wh, "auth", "%s", "TKIP countermeasures enabled");
1708 vap->iv_stats.is_rx_auth_countermeasures++;
1709 if (vap->iv_opmode == IEEE80211_M_HOSTAP) {
1710 ieee80211_send_error(ni, wh->i_addr2,
1711 IEEE80211_FC0_SUBTYPE_AUTH,
1712 IEEE80211_REASON_MIC_FAILURE);
1716 if (algo == IEEE80211_AUTH_ALG_SHARED)
1717 sta_auth_shared(ni, wh, frm + 6, efrm, rssi, nf,
1719 else if (algo == IEEE80211_AUTH_ALG_OPEN)
1720 sta_auth_open(ni, wh, rssi, nf, seq, status);
1722 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1723 wh, "auth", "unsupported alg %d", algo);
1724 vap->iv_stats.is_rx_auth_unsupported++;
1730 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
1731 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: {
1732 uint16_t capinfo, associd;
1735 if (vap->iv_state != IEEE80211_S_ASSOC) {
1736 vap->iv_stats.is_rx_mgtdiscard++;
1741 * asresp frame format
1742 * [2] capability information
1744 * [2] association ID
1745 * [tlv] supported rates
1746 * [tlv] extended supported rates
1748 * [tlv] HT capabilities
1751 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return);
1753 capinfo = le16toh(*(uint16_t *)frm);
1755 status = le16toh(*(uint16_t *)frm);
1758 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC,
1759 wh->i_addr2, "%sassoc failed (reason %d)",
1760 ISREASSOC(subtype) ? "re" : "", status);
1761 vap->iv_stats.is_rx_auth_fail++; /* XXX */
1764 associd = le16toh(*(uint16_t *)frm);
1767 rates = xrates = wme = htcap = htinfo = NULL;
1768 vhtcap = vhtopmode = NULL;
1769 while (efrm - frm > 1) {
1770 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1772 case IEEE80211_ELEMID_RATES:
1775 case IEEE80211_ELEMID_XRATES:
1778 case IEEE80211_ELEMID_HTCAP:
1781 case IEEE80211_ELEMID_HTINFO:
1784 case IEEE80211_ELEMID_VENDOR:
1787 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) {
1789 * Accept pre-draft HT ie's if the
1790 * standard ones have not been seen.
1792 if (ishtcapoui(frm)) {
1795 } else if (ishtinfooui(frm)) {
1800 /* XXX Atheros OUI support */
1802 case IEEE80211_ELEMID_VHT_CAP:
1805 case IEEE80211_ELEMID_VHT_OPMODE:
1812 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
1814 IEEE80211_VERIFY_ELEMENT(xrates,
1815 IEEE80211_RATE_MAXSIZE - rates[1], return);
1816 rate = ieee80211_setup_rates(ni, rates, xrates,
1818 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
1819 IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
1820 if (rate & IEEE80211_RATE_BASIC) {
1821 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC,
1823 "%sassoc failed (rate set mismatch)",
1824 ISREASSOC(subtype) ? "re" : "");
1825 vap->iv_stats.is_rx_assoc_norate++;
1826 ieee80211_new_state(vap, IEEE80211_S_SCAN,
1827 IEEE80211_SCAN_FAIL_STATUS);
1831 ni->ni_capinfo = capinfo;
1832 ni->ni_associd = associd;
1833 if (ni->ni_jointime == 0)
1834 ni->ni_jointime = time_uptime;
1836 ieee80211_parse_wmeparams(vap, wme, wh, &qosinfo) >= 0) {
1837 ni->ni_flags |= IEEE80211_NODE_QOS;
1838 ieee80211_wme_updateparams(vap);
1840 ni->ni_flags &= ~IEEE80211_NODE_QOS;
1842 * Setup HT state according to the negotiation.
1844 * NB: shouldn't need to check if HT use is enabled but some
1845 * ap's send back HT ie's even when we don't indicate we
1846 * are HT capable in our AssocReq.
1848 if (htcap != NULL && htinfo != NULL &&
1849 (vap->iv_flags_ht & IEEE80211_FHT_HT)) {
1850 ieee80211_ht_node_init(ni);
1851 ieee80211_ht_updateparams(ni, htcap, htinfo);
1853 if ((vhtcap != NULL) && (vhtopmode != NULL) &
1854 (vap->iv_flags_vht & IEEE80211_FVHT_VHT)) {
1856 * Log if we get a VHT assoc/reassoc response.
1857 * We aren't ready for 2GHz VHT support.
1859 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) {
1860 printf("%s: peer %6D: VHT on 2GHz, ignoring\n",
1865 ieee80211_vht_node_init(ni);
1866 ieee80211_vht_updateparams(ni, vhtcap, vhtopmode);
1867 ieee80211_setup_vht_rates(ni, vhtcap, vhtopmode);
1871 ieee80211_ht_updateparams_final(ni, htcap, htinfo);
1872 ieee80211_setup_htrates(ni, htcap,
1873 IEEE80211_F_JOIN | IEEE80211_F_DOBRS);
1874 ieee80211_setup_basic_htrates(ni, htinfo);
1876 ieee80211_node_setuptxparms(ni);
1877 ieee80211_ratectl_node_init(ni);
1881 * Always initialise FF/superg state; we can use this
1882 * for doing A-MSDU encapsulation as well.
1884 #ifdef IEEE80211_SUPPORT_SUPERG
1885 ieee80211_ff_node_init(ni);
1889 * Configure state now that we are associated.
1891 * XXX may need different/additional driver callbacks?
1893 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) ||
1894 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) {
1895 vap->iv_flags |= IEEE80211_F_SHPREAMBLE;
1896 vap->iv_flags &= ~IEEE80211_F_USEBARKER;
1898 vap->iv_flags &= ~IEEE80211_F_SHPREAMBLE;
1899 vap->iv_flags |= IEEE80211_F_USEBARKER;
1901 ieee80211_vap_set_shortslottime(vap,
1902 IEEE80211_IS_CHAN_A(ic->ic_curchan) ||
1903 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME));
1904 ieee80211_vap_update_preamble(vap);
1906 * Honor ERP protection.
1908 * NB: ni_erp should zero for non-11g operation.
1910 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
1911 (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION))
1912 vap->iv_flags |= IEEE80211_F_USEPROT;
1914 vap->iv_flags &= ~IEEE80211_F_USEPROT;
1915 ieee80211_vap_update_erp_protmode(vap);
1916 IEEE80211_NOTE_MAC(vap,
1917 IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, wh->i_addr2,
1918 "%sassoc success at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s%s",
1919 ISREASSOC(subtype) ? "re" : "",
1920 IEEE80211_NODE_AID(ni),
1921 vap->iv_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long",
1922 vap->iv_flags&IEEE80211_F_SHSLOT ? "short" : "long",
1923 vap->iv_flags&IEEE80211_F_USEPROT ? ", protection" : "",
1924 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "",
1925 ni->ni_flags & IEEE80211_NODE_HT ?
1926 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "",
1927 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "",
1928 ni->ni_flags & IEEE80211_NODE_AMSDU ? " (+AMSDU)" : "",
1929 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" :
1930 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "",
1931 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "",
1932 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ?
1933 ", fast-frames" : "",
1934 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ?
1937 ieee80211_new_state(vap, IEEE80211_S_RUN, subtype);
1941 case IEEE80211_FC0_SUBTYPE_DEAUTH: {
1944 if (vap->iv_state == IEEE80211_S_SCAN) {
1945 vap->iv_stats.is_rx_mgtdiscard++;
1948 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) {
1949 /* NB: can happen when in promiscuous mode */
1950 vap->iv_stats.is_rx_mgtdiscard++;
1955 * deauth frame format
1958 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return);
1959 reason = le16toh(*(uint16_t *)frm);
1961 vap->iv_stats.is_rx_deauth++;
1962 vap->iv_stats.is_rx_deauth_code = reason;
1963 IEEE80211_NODE_STAT(ni, rx_deauth);
1965 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni,
1966 "recv deauthenticate (reason: %d (%s))", reason,
1967 ieee80211_reason_to_string(reason));
1968 ieee80211_new_state(vap, IEEE80211_S_AUTH,
1969 (reason << 8) | IEEE80211_FC0_SUBTYPE_DEAUTH);
1973 case IEEE80211_FC0_SUBTYPE_DISASSOC: {
1976 if (vap->iv_state != IEEE80211_S_RUN &&
1977 vap->iv_state != IEEE80211_S_ASSOC &&
1978 vap->iv_state != IEEE80211_S_AUTH) {
1979 vap->iv_stats.is_rx_mgtdiscard++;
1982 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) {
1983 /* NB: can happen when in promiscuous mode */
1984 vap->iv_stats.is_rx_mgtdiscard++;
1989 * disassoc frame format
1992 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return);
1993 reason = le16toh(*(uint16_t *)frm);
1995 vap->iv_stats.is_rx_disassoc++;
1996 vap->iv_stats.is_rx_disassoc_code = reason;
1997 IEEE80211_NODE_STAT(ni, rx_disassoc);
1999 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
2000 "recv disassociate (reason: %d (%s))", reason,
2001 ieee80211_reason_to_string(reason));
2002 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0);
2006 case IEEE80211_FC0_SUBTYPE_ACTION:
2007 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
2008 if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
2009 !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2010 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2011 wh, NULL, "%s", "not for us");
2012 vap->iv_stats.is_rx_mgtdiscard++;
2013 } else if (vap->iv_state != IEEE80211_S_RUN) {
2014 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2015 wh, NULL, "wrong state %s",
2016 ieee80211_state_name[vap->iv_state]);
2017 vap->iv_stats.is_rx_mgtdiscard++;
2019 if (ieee80211_parse_action(ni, m0) == 0)
2020 (void)ic->ic_recv_action(ni, wh, frm, efrm);
2024 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
2025 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
2026 case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
2027 case IEEE80211_FC0_SUBTYPE_TIMING_ADV:
2028 case IEEE80211_FC0_SUBTYPE_ATIM:
2029 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2030 wh, NULL, "%s", "not handled");
2031 vap->iv_stats.is_rx_mgtdiscard++;
2035 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2036 wh, "mgt", "subtype 0x%x not handled", subtype);
2037 vap->iv_stats.is_rx_badsubtype++;
2044 sta_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
2047 case IEEE80211_FC0_SUBTYPE_BAR:
2048 ieee80211_recv_bar(ni, m);