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;
555 KASSERT(ni != NULL, ("%s: null node, mbuf %p", __func__, m));
557 /* Early init in case of early error case. */
561 * Bit of a cheat here, we use a pointer for a 3-address
562 * frame format but don't reference fields past outside
563 * ieee80211_frame_min (or other shorter frames) w/o first
564 * validating the data is present.
566 wh = mtod(m, struct ieee80211_frame *);
568 if (m->m_pkthdr.len < 2 || m->m_pkthdr.len < ieee80211_anyhdrsize(wh)) {
569 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
570 ni->ni_macaddr, NULL,
571 "too short (1): len %u", m->m_pkthdr.len);
572 vap->iv_stats.is_rx_tooshort++;
575 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
576 IEEE80211_FC0_VERSION_0) {
577 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
578 ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x",
579 wh->i_fc[0], wh->i_fc[1]);
580 vap->iv_stats.is_rx_badversion++;
585 * Some devices do hardware decryption all the way through
586 * to pretending the frame wasn't encrypted in the first place.
587 * So, tag it appropriately so it isn't discarded inappropriately.
589 if ((rxs != NULL) && (rxs->c_pktflags & IEEE80211_RX_F_DECRYPTED))
592 if (m->m_flags & M_AMPDU_MPDU) {
594 * Fastpath for A-MPDU reorder q resubmission. Frames
595 * w/ M_AMPDU_MPDU marked have already passed through
596 * here but were received out of order and been held on
597 * the reorder queue. When resubmitted they are marked
598 * with the M_AMPDU_MPDU flag and we can bypass most of
599 * the normal processing.
601 type = IEEE80211_FC0_TYPE_DATA;
602 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
603 subtype = IEEE80211_FC0_SUBTYPE_QOS;
604 hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */
608 ni->ni_inact = ni->ni_inact_reload;
610 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
611 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
612 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
614 * Control frames are not folowing the header scheme of data and mgmt
615 * frames so we do not apply extra checks here.
616 * We probably should do checks on RA (+TA) where available for those
617 * too, but for now do not drop them.
619 if (type != IEEE80211_FC0_TYPE_CTL &&
620 (ic->ic_flags & IEEE80211_F_SCAN) == 0) {
622 if (!IEEE80211_ADDR_EQ(bssid, ni->ni_bssid)) {
623 /* not interested in */
624 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
625 bssid, NULL, "%s", "not to bss");
626 vap->iv_stats.is_rx_wrongbss++;
631 * Some devices may be in a promiscuous mode
632 * where they receive frames for multiple station
635 * If we receive a data frame that isn't
636 * destined to our VAP MAC, drop it.
638 * XXX TODO: This is only enforced when not scanning;
639 * XXX it assumes a software-driven scan will put the NIC
640 * XXX into a "no data frames" mode before setting this
641 * XXX flag. Otherwise it may be possible that we'll still
642 * XXX process data frames whilst scanning.
644 if ((! IEEE80211_IS_MULTICAST(wh->i_addr1))
645 && (! IEEE80211_ADDR_EQ(wh->i_addr1, IF_LLADDR(ifp)))) {
646 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
647 bssid, NULL, "not to cur sta: lladdr=%6D, addr1=%6D",
648 IF_LLADDR(ifp), ":", wh->i_addr1, ":");
649 vap->iv_stats.is_rx_wrongbss++;
653 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
655 if ( IEEE80211_HAS_SEQ(type, subtype) &&
656 !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
657 uint8_t tid = ieee80211_gettid(wh);
658 if (IEEE80211_QOS_HAS_SEQ(wh) &&
659 TID_TO_WME_AC(tid) >= WME_AC_VI)
660 ic->ic_wme.wme_hipri_traffic++;
661 if (! ieee80211_check_rxseq(ni, wh, bssid, rxs))
667 case IEEE80211_FC0_TYPE_DATA:
668 hdrspace = ieee80211_hdrspace(ic, wh);
669 if (m->m_len < hdrspace &&
670 (m = m_pullup(m, hdrspace)) == NULL) {
671 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
672 ni->ni_macaddr, NULL,
673 "data too short: expecting %u", hdrspace);
674 vap->iv_stats.is_rx_tooshort++;
678 * Handle A-MPDU re-ordering. If the frame is to be
679 * processed directly then ieee80211_ampdu_reorder
680 * will return 0; otherwise it has consumed the mbuf
681 * and we should do nothing more with it.
683 if ((m->m_flags & M_AMPDU) &&
684 (dir == IEEE80211_FC1_DIR_FROMDS ||
685 dir == IEEE80211_FC1_DIR_DSTODS) &&
686 ieee80211_ampdu_reorder(ni, m, rxs) != 0) {
691 if (dir == IEEE80211_FC1_DIR_FROMDS) {
692 if ((ifp->if_flags & IFF_SIMPLEX) &&
693 isfromds_mcastecho(vap, wh)) {
695 * In IEEE802.11 network, multicast
696 * packets sent from "me" are broadcast
697 * from the AP; silently discard for
700 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
701 wh, "data", "%s", "multicast echo");
702 vap->iv_stats.is_rx_mcastecho++;
705 if ((vap->iv_flags & IEEE80211_F_DWDS) &&
706 IEEE80211_IS_MULTICAST(wh->i_addr1)) {
708 * DWDS sta's must drop 3-address mcast frames
709 * as they will be sent separately as a 4-addr
710 * frame. Accepting the 3-addr frame will
711 * confuse the bridge into thinking the sending
712 * sta is located at the end of WDS link.
714 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh,
715 "3-address data", "%s", "DWDS enabled");
716 vap->iv_stats.is_rx_mcastecho++;
719 } else if (dir == IEEE80211_FC1_DIR_DSTODS) {
720 if ((vap->iv_flags & IEEE80211_F_DWDS) == 0) {
721 IEEE80211_DISCARD(vap,
722 IEEE80211_MSG_INPUT, wh, "4-address data",
723 "%s", "DWDS not enabled");
724 vap->iv_stats.is_rx_wrongdir++;
727 if ((ifp->if_flags & IFF_SIMPLEX) &&
728 isdstods_mcastecho(vap, wh)) {
730 * In IEEE802.11 network, multicast
731 * packets sent from "me" are broadcast
732 * from the AP; silently discard for
735 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh,
736 "4-address data", "%s", "multicast echo");
737 vap->iv_stats.is_rx_mcastecho++;
741 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh,
742 "data", "incorrect dir 0x%x", dir);
743 vap->iv_stats.is_rx_wrongdir++;
748 * Handle privacy requirements for hardware decryption
751 * For those devices, a handful of things happen.
753 * + If IV has been stripped, then we can't run
754 * ieee80211_crypto_decap() - none of the key
755 * + If MIC has been stripped, we can't validate
757 * + If MIC fails, then we need to communicate a
758 * MIC failure up to the stack - but we don't know
759 * which key was used.
763 * Handle privacy requirements. Note that we
764 * must not be preempted from here until after
765 * we (potentially) call ieee80211_crypto_demic;
766 * otherwise we may violate assumptions in the
767 * crypto cipher modules used to do delayed update
768 * of replay sequence numbers.
770 if (is_hw_decrypted || wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
771 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
773 * Discard encrypted frames when privacy is off.
775 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
776 wh, "WEP", "%s", "PRIVACY off");
777 vap->iv_stats.is_rx_noprivacy++;
778 IEEE80211_NODE_STAT(ni, rx_noprivacy);
781 if (ieee80211_crypto_decap(ni, m, hdrspace, &key) == 0) {
782 /* NB: stats+msgs handled in crypto_decap */
783 IEEE80211_NODE_STAT(ni, rx_wepfail);
786 wh = mtod(m, struct ieee80211_frame *);
787 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED;
790 /* XXX M_WEP and IEEE80211_F_PRIVACY */
795 * Save QoS bits for use below--before we strip the header.
797 if (subtype == IEEE80211_FC0_SUBTYPE_QOS)
798 qos = ieee80211_getqos(wh)[0];
803 * Next up, any fragmentation.
805 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
806 m = ieee80211_defrag(ni, m, hdrspace, has_decrypted);
808 /* Fragment dropped or frame not complete yet */
812 wh = NULL; /* no longer valid, catch any uses */
815 * Next strip any MSDU crypto bits.
817 * Note: we can't do MIC stripping/verification if the
818 * upper layer has stripped it. We have to check MIC
819 * ourselves. So, key may be NULL, but we have to check
822 if (!ieee80211_crypto_demic(vap, key, m, 0)) {
823 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
824 ni->ni_macaddr, "data", "%s", "demic error");
825 vap->iv_stats.is_rx_demicfail++;
826 IEEE80211_NODE_STAT(ni, rx_demicfail);
830 /* copy to listener after decrypt */
831 if (ieee80211_radiotap_active_vap(vap))
832 ieee80211_radiotap_rx(vap, m);
836 * Finally, strip the 802.11 header.
838 m = ieee80211_decap(vap, m, hdrspace, qos);
840 /* XXX mask bit to check for both */
841 /* don't count Null data frames as errors */
842 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
843 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
845 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
846 ni->ni_macaddr, "data", "%s", "decap error");
847 vap->iv_stats.is_rx_decap++;
848 IEEE80211_NODE_STAT(ni, rx_decap);
851 if (!(qos & IEEE80211_QOS_AMSDU))
852 eh = mtod(m, struct ether_header *);
855 if (!ieee80211_node_is_authorized(ni)) {
857 * Deny any non-PAE frames received prior to
858 * authorization. For open/shared-key
859 * authentication the port is mark authorized
860 * after authentication completes. For 802.1x
861 * the port is not marked authorized by the
862 * authenticator until the handshake has completed.
865 eh->ether_type != htons(ETHERTYPE_PAE)) {
866 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
867 ni->ni_macaddr, "data", "unauthorized or "
868 "unknown port: ether type 0x%x len %u",
869 eh == NULL ? -1 : eh->ether_type,
871 vap->iv_stats.is_rx_unauth++;
872 IEEE80211_NODE_STAT(ni, rx_unauth);
877 * When denying unencrypted frames, discard
878 * any non-PAE frames received without encryption.
880 if ((vap->iv_flags & IEEE80211_F_DROPUNENC) &&
881 ((has_decrypted == 0) && (m->m_flags & M_WEP) == 0) &&
882 (is_hw_decrypted == 0) &&
884 eh->ether_type != htons(ETHERTYPE_PAE))) {
886 * Drop unencrypted frames.
888 vap->iv_stats.is_rx_unencrypted++;
889 IEEE80211_NODE_STAT(ni, rx_unencrypted);
893 /* XXX require HT? */
894 if (qos & IEEE80211_QOS_AMSDU) {
895 m = ieee80211_decap_amsdu(ni, m);
897 return IEEE80211_FC0_TYPE_DATA;
899 #ifdef IEEE80211_SUPPORT_SUPERG
900 m = ieee80211_decap_fastframe(vap, ni, m);
902 return IEEE80211_FC0_TYPE_DATA;
905 ieee80211_deliver_data(vap, ni, m);
906 return IEEE80211_FC0_TYPE_DATA;
908 case IEEE80211_FC0_TYPE_MGT:
909 vap->iv_stats.is_rx_mgmt++;
910 IEEE80211_NODE_STAT(ni, rx_mgmt);
911 if (dir != IEEE80211_FC1_DIR_NODS) {
912 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
913 wh, "data", "incorrect dir 0x%x", dir);
914 vap->iv_stats.is_rx_wrongdir++;
917 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
918 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
919 ni->ni_macaddr, "mgt", "too short: len %u",
921 vap->iv_stats.is_rx_tooshort++;
924 #ifdef IEEE80211_DEBUG
925 if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) ||
926 ieee80211_msg_dumppkts(vap)) {
927 if_printf(ifp, "received %s from %s rssi %d\n",
928 ieee80211_mgt_subtype_name(subtype),
929 ether_sprintf(wh->i_addr2), rssi);
934 * Note: See above for hardware offload privacy requirements.
935 * It also applies here.
939 * Again, having encrypted flag set check would be good, but
940 * then we have to also handle crypto_decap() like above.
942 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
943 if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) {
945 * Only shared key auth frames with a challenge
946 * should be encrypted, discard all others.
948 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
949 wh, ieee80211_mgt_subtype_name(subtype),
950 "%s", "WEP set but not permitted");
951 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
954 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
956 * Discard encrypted frames when privacy is off.
958 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
959 wh, "mgt", "%s", "WEP set but PRIVACY off");
960 vap->iv_stats.is_rx_noprivacy++;
963 hdrspace = ieee80211_hdrspace(ic, wh);
966 * Again, if IV/MIC was stripped, then this whole
967 * setup will fail. That's going to need some poking.
969 if (ieee80211_crypto_decap(ni, m, hdrspace, &key) == 0) {
970 /* NB: stats+msgs handled in crypto_decap */
974 wh = mtod(m, struct ieee80211_frame *);
975 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED;
977 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf);
980 case IEEE80211_FC0_TYPE_CTL:
981 vap->iv_stats.is_rx_ctl++;
982 IEEE80211_NODE_STAT(ni, rx_ctrl);
983 vap->iv_recv_ctl(ni, m, subtype);
987 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
988 wh, NULL, "bad frame type 0x%x", type);
989 /* should not come here */
993 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
996 if (need_tap && ieee80211_radiotap_active_vap(vap))
997 ieee80211_radiotap_rx(vap, m);
1004 sta_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh,
1005 int rssi, int nf, uint16_t seq, uint16_t status)
1007 struct ieee80211vap *vap = ni->ni_vap;
1009 if (ni->ni_authmode == IEEE80211_AUTH_SHARED) {
1010 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1011 ni->ni_macaddr, "open auth",
1012 "bad sta auth mode %u", ni->ni_authmode);
1013 vap->iv_stats.is_rx_bad_auth++; /* XXX */
1016 if (vap->iv_state != IEEE80211_S_AUTH ||
1017 seq != IEEE80211_AUTH_OPEN_RESPONSE) {
1018 vap->iv_stats.is_rx_bad_auth++;
1022 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH,
1023 ni, "open auth failed (reason %d)", status);
1024 vap->iv_stats.is_rx_auth_fail++;
1025 vap->iv_stats.is_rx_authfail_code = status;
1026 ieee80211_new_state(vap, IEEE80211_S_SCAN,
1027 IEEE80211_SCAN_FAIL_STATUS);
1029 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0);
1033 sta_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh,
1034 uint8_t *frm, uint8_t *efrm, int rssi, int nf,
1035 uint16_t seq, uint16_t status)
1037 struct ieee80211vap *vap = ni->ni_vap;
1041 * NB: this can happen as we allow pre-shared key
1042 * authentication to be enabled w/o wep being turned
1043 * on so that configuration of these can be done
1044 * in any order. It may be better to enforce the
1045 * ordering in which case this check would just be
1046 * for sanity/consistency.
1048 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
1049 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1050 ni->ni_macaddr, "shared key auth",
1051 "%s", " PRIVACY is disabled");
1055 * Pre-shared key authentication is evil; accept
1056 * it only if explicitly configured (it is supported
1057 * mainly for compatibility with clients like OS X).
1059 if (ni->ni_authmode != IEEE80211_AUTH_AUTO &&
1060 ni->ni_authmode != IEEE80211_AUTH_SHARED) {
1061 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1062 ni->ni_macaddr, "shared key auth",
1063 "bad sta auth mode %u", ni->ni_authmode);
1064 vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */
1069 if (frm + 1 < efrm) {
1070 if ((frm[1] + 2) > (efrm - frm)) {
1071 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1072 ni->ni_macaddr, "shared key auth",
1073 "ie %d/%d too long",
1074 frm[0], (frm[1] + 2) - (efrm - frm));
1075 vap->iv_stats.is_rx_bad_auth++;
1078 if (*frm == IEEE80211_ELEMID_CHALLENGE)
1083 case IEEE80211_AUTH_SHARED_CHALLENGE:
1084 case IEEE80211_AUTH_SHARED_RESPONSE:
1085 if (challenge == NULL) {
1086 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1087 ni->ni_macaddr, "shared key auth",
1088 "%s", "no challenge");
1089 vap->iv_stats.is_rx_bad_auth++;
1092 if (challenge[1] != IEEE80211_CHALLENGE_LEN) {
1093 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1094 ni->ni_macaddr, "shared key auth",
1095 "bad challenge len %d", challenge[1]);
1096 vap->iv_stats.is_rx_bad_auth++;
1102 if (vap->iv_state != IEEE80211_S_AUTH)
1105 case IEEE80211_AUTH_SHARED_PASS:
1106 if (ni->ni_challenge != NULL) {
1107 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE);
1108 ni->ni_challenge = NULL;
1111 IEEE80211_NOTE_FRAME(vap,
1112 IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, wh,
1113 "shared key auth failed (reason %d)", status);
1114 vap->iv_stats.is_rx_auth_fail++;
1115 vap->iv_stats.is_rx_authfail_code = status;
1118 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0);
1120 case IEEE80211_AUTH_SHARED_CHALLENGE:
1121 if (!ieee80211_alloc_challenge(ni))
1123 /* XXX could optimize by passing recvd challenge */
1124 memcpy(ni->ni_challenge, &challenge[2], challenge[1]);
1125 IEEE80211_SEND_MGMT(ni,
1126 IEEE80211_FC0_SUBTYPE_AUTH, seq + 1);
1129 IEEE80211_DISCARD(vap, IEEE80211_MSG_AUTH,
1130 wh, "shared key auth", "bad seq %d", seq);
1131 vap->iv_stats.is_rx_bad_auth++;
1137 * Kick the state machine. This short-circuits
1138 * using the mgt frame timeout to trigger the
1141 if (vap->iv_state == IEEE80211_S_AUTH)
1142 ieee80211_new_state(vap, IEEE80211_S_SCAN,
1143 IEEE80211_SCAN_FAIL_STATUS);
1147 * Parse the WME IE for QoS and U-APSD information.
1149 * Returns -1 if the IE isn't found, 1 if it's found.
1152 ieee80211_parse_wmeie(uint8_t *frm, const struct ieee80211_frame *wh,
1153 struct ieee80211_node *ni)
1159 if (len < sizeof(struct ieee80211_wme_param)-2) {
1160 IEEE80211_DISCARD_IE(ni->ni_vap,
1161 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WME,
1162 wh, "WME", "too short, len %u", len);
1166 ni->ni_uapsd = frm[WME_CAPINFO_IE_OFFSET];
1168 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_POWER | IEEE80211_MSG_ASSOC,
1169 ni, "U-APSD settings from STA: 0x%02x", ni->ni_uapsd);
1175 ieee80211_parse_wmeparams(struct ieee80211vap *vap, uint8_t *frm,
1176 const struct ieee80211_frame *wh, uint8_t *qosinfo)
1178 struct ieee80211_wme_state *wme = &vap->iv_ic->ic_wme;
1179 u_int len = frm[1], qosinfo_count;
1184 if (len < sizeof(struct ieee80211_wme_param)-2) {
1185 IEEE80211_DISCARD_IE(vap,
1186 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WME,
1187 wh, "WME", "too short, len %u", len);
1190 *qosinfo = frm[__offsetof(struct ieee80211_wme_param, param_qosInfo)];
1191 qosinfo_count = *qosinfo & WME_QOSINFO_COUNT;
1193 /* XXX do proper check for wraparound */
1194 if (qosinfo_count == wme->wme_wmeChanParams.cap_info)
1196 frm += __offsetof(struct ieee80211_wme_param, params_acParams);
1197 for (i = 0; i < WME_NUM_AC; i++) {
1198 struct wmeParams *wmep =
1199 &wme->wme_wmeChanParams.cap_wmeParams[i];
1200 /* NB: ACI not used */
1201 wmep->wmep_acm = _IEEE80211_MASKSHIFT(frm[0], WME_PARAM_ACM);
1203 _IEEE80211_MASKSHIFT(frm[0], WME_PARAM_AIFSN);
1204 wmep->wmep_logcwmin =
1205 _IEEE80211_MASKSHIFT(frm[1], WME_PARAM_LOGCWMIN);
1206 wmep->wmep_logcwmax =
1207 _IEEE80211_MASKSHIFT(frm[1], WME_PARAM_LOGCWMAX);
1208 wmep->wmep_txopLimit = le16dec(frm+2);
1209 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1210 "%s: WME: %d: acm=%d aifsn=%d logcwmin=%d logcwmax=%d txopLimit=%d\n",
1215 wmep->wmep_logcwmin,
1216 wmep->wmep_logcwmax,
1217 wmep->wmep_txopLimit);
1220 wme->wme_wmeChanParams.cap_info = qosinfo_count;
1225 * Process 11h Channel Switch Announcement (CSA) ie. If this
1226 * is the first CSA then initiate the switch. Otherwise we
1227 * track state and trigger completion and/or cancel of the switch.
1228 * XXX should be public for IBSS use
1231 ieee80211_parse_csaparams(struct ieee80211vap *vap, uint8_t *frm,
1232 const struct ieee80211_frame *wh)
1234 struct ieee80211com *ic = vap->iv_ic;
1235 const struct ieee80211_csa_ie *csa =
1236 (const struct ieee80211_csa_ie *) frm;
1238 KASSERT(vap->iv_state >= IEEE80211_S_RUN,
1239 ("state %s", ieee80211_state_name[vap->iv_state]));
1241 if (csa->csa_mode > 1) {
1242 IEEE80211_DISCARD_IE(vap,
1243 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH,
1244 wh, "CSA", "invalid mode %u", csa->csa_mode);
1248 if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) {
1250 * Convert the channel number to a channel reference. We
1251 * try first to preserve turbo attribute of the current
1252 * channel then fallback. Note this will not work if the
1253 * CSA specifies a channel that requires a band switch (e.g.
1254 * 11a => 11g). This is intentional as 11h is defined only
1255 * for 5GHz/11a and because the switch does not involve a
1256 * reassociation, protocol state (capabilities, negotated
1257 * rates, etc) may/will be wrong.
1259 struct ieee80211_channel *c =
1260 ieee80211_find_channel_byieee(ic, csa->csa_newchan,
1261 (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALLTURBO));
1263 c = ieee80211_find_channel_byieee(ic,
1265 (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALL));
1267 IEEE80211_DISCARD_IE(vap,
1268 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH,
1269 wh, "CSA", "invalid channel %u",
1274 #if IEEE80211_CSA_COUNT_MIN > 0
1275 if (csa->csa_count < IEEE80211_CSA_COUNT_MIN) {
1277 * Require at least IEEE80211_CSA_COUNT_MIN count to
1278 * reduce the risk of being redirected by a fabricated
1279 * CSA. If a valid CSA is dropped we'll still get a
1280 * beacon miss when the AP leaves the channel so we'll
1281 * eventually follow to the new channel.
1283 * NOTE: this violates the 11h spec that states that
1284 * count may be any value and if 0 then a switch
1285 * should happen asap.
1287 IEEE80211_DISCARD_IE(vap,
1288 IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH,
1289 wh, "CSA", "count %u too small, must be >= %u",
1290 csa->csa_count, IEEE80211_CSA_COUNT_MIN);
1294 ieee80211_csa_startswitch(ic, c, csa->csa_mode, csa->csa_count);
1297 * Validate this ie against the initial CSA. We require
1298 * mode and channel not change and the count must be
1299 * monotonically decreasing. This may be pointless and
1300 * canceling the switch as a result may be too paranoid but
1301 * in the worst case if we drop out of CSA because of this
1302 * and the AP does move then we'll just end up taking a
1303 * beacon miss and scan to find the AP.
1305 * XXX may want <= on count as we also process ProbeResp
1306 * frames and those may come in w/ the same count as the
1307 * previous beacon; but doing so leaves us open to a stuck
1308 * count until we add a dead-man timer
1310 if (!(csa->csa_count < ic->ic_csa_count &&
1311 csa->csa_mode == ic->ic_csa_mode &&
1312 csa->csa_newchan == ieee80211_chan2ieee(ic, ic->ic_csa_newchan))) {
1313 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_DOTH, wh,
1314 "CSA ie mismatch, initial ie <%d,%d,%d>, "
1315 "this ie <%d,%d,%d>", ic->ic_csa_mode,
1316 ic->ic_csa_newchan, ic->ic_csa_count,
1317 csa->csa_mode, csa->csa_newchan, csa->csa_count);
1318 ieee80211_csa_cancelswitch(ic);
1320 if (csa->csa_count <= 1)
1321 ieee80211_csa_completeswitch(ic);
1323 ic->ic_csa_count = csa->csa_count;
1327 IEEE80211_UNLOCK(ic);
1331 * Return non-zero if a background scan may be continued:
1332 * o bg scan is active
1333 * o no channel switch is pending
1334 * o there has not been any traffic recently
1335 * o no full-offload scan support (no need for explicitly continuing scan then)
1337 * Note we do not check if there is an administrative enable;
1338 * this is only done to start the scan. We assume that any
1339 * change in state will be accompanied by a request to cancel
1340 * active scans which will otherwise cause this test to fail.
1343 contbgscan(struct ieee80211vap *vap)
1345 struct ieee80211com *ic = vap->iv_ic;
1347 return ((ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN) &&
1348 (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 &&
1349 !(vap->iv_flags_ext & IEEE80211_FEXT_SCAN_OFFLOAD) &&
1350 vap->iv_state == IEEE80211_S_RUN && /* XXX? */
1351 ieee80211_time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle));
1355 * Return non-zero if a backgrond scan may be started:
1356 * o bg scanning is administratively enabled
1357 * o no channel switch is pending
1358 * o we are not boosted on a dynamic turbo channel
1359 * o there has not been a scan recently
1360 * o there has not been any traffic recently (don't check if full-offload scan)
1363 startbgscan(struct ieee80211vap *vap)
1365 struct ieee80211com *ic = vap->iv_ic;
1367 return ((vap->iv_flags & IEEE80211_F_BGSCAN) &&
1368 (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 &&
1369 #ifdef IEEE80211_SUPPORT_SUPERG
1370 !IEEE80211_IS_CHAN_DTURBO(ic->ic_curchan) &&
1372 ieee80211_time_after(ticks, ic->ic_lastscan + vap->iv_bgscanintvl) &&
1373 ((vap->iv_flags_ext & IEEE80211_FEXT_SCAN_OFFLOAD) ||
1374 ieee80211_time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)));
1379 * Compare two quiet IEs and return if they are equivalent.
1381 * The tbttcount isnt checked - that's not part of the configuration.
1384 compare_quiet_ie(const struct ieee80211_quiet_ie *q1,
1385 const struct ieee80211_quiet_ie *q2)
1388 if (q1->period != q2->period)
1390 if (le16dec(&q1->duration) != le16dec(&q2->duration))
1392 if (le16dec(&q1->offset) != le16dec(&q2->offset))
1399 sta_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
1400 const struct ieee80211_rx_stats *rxs,
1403 #define ISREASSOC(_st) ((_st) == IEEE80211_FC0_SUBTYPE_REASSOC_RESP)
1404 struct ieee80211vap *vap = ni->ni_vap;
1405 struct ieee80211com *ic = ni->ni_ic;
1406 struct ieee80211_channel *rxchan = ic->ic_curchan;
1407 struct ieee80211_frame *wh;
1408 int ht_state_change = 0, do_ht = 0;
1409 uint8_t *frm, *efrm;
1410 uint8_t *rates, *xrates, *wme, *htcap, *htinfo;
1411 uint8_t *vhtcap, *vhtopmode;
1415 wh = mtod(m0, struct ieee80211_frame *);
1416 frm = (uint8_t *)&wh[1];
1417 efrm = mtod(m0, uint8_t *) + m0->m_len;
1419 case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1420 case IEEE80211_FC0_SUBTYPE_BEACON: {
1421 struct ieee80211_scanparams scan;
1422 struct ieee80211_channel *c;
1424 * We process beacon/probe response frames:
1425 * o when scanning, or
1426 * o station mode when associated (to collect state
1427 * updates such as 802.11g slot time)
1428 * Frames otherwise received are discarded.
1430 if (!((ic->ic_flags & IEEE80211_F_SCAN) || ni->ni_associd)) {
1431 vap->iv_stats.is_rx_mgtdiscard++;
1435 /* Override RX channel as appropriate */
1437 c = ieee80211_lookup_channel_rxstatus(vap, rxs);
1442 /* XXX probe response in sta mode when !scanning? */
1443 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0) {
1444 if (! (ic->ic_flags & IEEE80211_F_SCAN))
1445 vap->iv_stats.is_beacon_bad++;
1450 * Count frame now that we know it's to be processed.
1452 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1453 vap->iv_stats.is_rx_beacon++; /* XXX remove */
1454 IEEE80211_NODE_STAT(ni, rx_beacons);
1456 IEEE80211_NODE_STAT(ni, rx_proberesp);
1458 * When operating in station mode, check for state updates.
1459 * Be careful to ignore beacons received while doing a
1460 * background scan. We consider only 11g/WMM stuff right now.
1462 if (ni->ni_associd != 0 &&
1463 ((ic->ic_flags & IEEE80211_F_SCAN) == 0 ||
1464 IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_bssid))) {
1465 /* record tsf of last beacon */
1466 memcpy(ni->ni_tstamp.data, scan.tstamp,
1467 sizeof(ni->ni_tstamp));
1468 /* count beacon frame for s/w bmiss handling */
1469 vap->iv_swbmiss_count++;
1470 vap->iv_bmiss_count = 0;
1471 if (ni->ni_erp != scan.erp) {
1472 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC,
1474 "erp change: was 0x%x, now 0x%x",
1475 ni->ni_erp, scan.erp);
1476 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
1477 (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION))
1478 vap->iv_flags |= IEEE80211_F_USEPROT;
1480 vap->iv_flags &= ~IEEE80211_F_USEPROT;
1481 ni->ni_erp = scan.erp;
1483 /* driver notification */
1484 ieee80211_vap_update_erp_protmode(vap);
1486 if ((ni->ni_capinfo ^ scan.capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME) {
1487 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC,
1489 "capabilities change: was 0x%x, now 0x%x",
1490 ni->ni_capinfo, scan.capinfo);
1492 * NB: we assume short preamble doesn't
1493 * change dynamically
1495 ieee80211_vap_set_shortslottime(vap,
1496 IEEE80211_IS_CHAN_A(ic->ic_bsschan) ||
1497 (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME));
1498 ni->ni_capinfo = (ni->ni_capinfo &~ IEEE80211_CAPINFO_SHORT_SLOTTIME)
1499 | (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME);
1502 if (scan.wme != NULL &&
1503 (ni->ni_flags & IEEE80211_NODE_QOS)) {
1505 if ((_retval = ieee80211_parse_wmeparams(vap,
1506 scan.wme, wh, &qosinfo)) >= 0) {
1507 if (qosinfo & WME_CAPINFO_UAPSD_EN)
1509 IEEE80211_NODE_UAPSD;
1511 ieee80211_wme_updateparams(vap);
1514 ni->ni_flags &= ~IEEE80211_NODE_UAPSD;
1515 #ifdef IEEE80211_SUPPORT_SUPERG
1516 if (scan.ath != NULL)
1517 ieee80211_parse_athparams(ni, scan.ath, wh);
1519 if (scan.htcap != NULL && scan.htinfo != NULL &&
1520 (vap->iv_flags_ht & IEEE80211_FHT_HT)) {
1521 /* XXX state changes? */
1522 ieee80211_ht_updateparams(ni,
1523 scan.htcap, scan.htinfo);
1526 if (scan.vhtcap != NULL && scan.vhtopmode != NULL &&
1527 (vap->iv_flags_vht & IEEE80211_FVHT_VHT)) {
1528 /* XXX state changes? */
1529 ieee80211_vht_updateparams(ni,
1530 scan.vhtcap, scan.vhtopmode);
1534 if (ieee80211_ht_updateparams_final(ni,
1535 scan.htcap, scan.htinfo))
1536 ht_state_change = 1;
1540 * If we have a quiet time IE then report it up to
1543 * Otherwise, inform the driver that the quiet time
1544 * IE has disappeared - only do that once rather than
1545 * spamming it each time.
1548 ic->ic_set_quiet(ni, scan.quiet);
1549 ni->ni_quiet_ie_set = 1;
1550 memcpy(&ni->ni_quiet_ie, scan.quiet,
1551 sizeof(struct ieee80211_quiet_ie));
1553 if (ni->ni_quiet_ie_set == 1)
1554 ic->ic_set_quiet(ni, NULL);
1555 ni->ni_quiet_ie_set = 0;
1556 bzero(&ni->ni_quiet_ie,
1557 sizeof(struct ieee80211_quiet_ie));
1560 if (scan.tim != NULL) {
1561 struct ieee80211_tim_ie *tim =
1562 (struct ieee80211_tim_ie *) scan.tim;
1564 * XXX Check/debug this code; see if it's about
1565 * the right time to force the VAP awake if we
1566 * receive a frame destined for us?
1568 int aid = IEEE80211_AID(ni->ni_associd);
1569 int ix = aid / NBBY;
1570 int min = tim->tim_bitctl &~ 1;
1571 int max = tim->tim_len + min - 4;
1578 * Only do this for unicast traffic in the TIM
1579 * The multicast traffic notification for
1580 * the scan notification stuff should occur
1583 if (min <= ix && ix <= max &&
1584 isset(tim->tim_bitmap - min, aid)) {
1590 * Do a separate notification
1591 * for the multicast bit being set.
1593 if (tim->tim_bitctl & 1) {
1599 * If the TIM indicates there's traffic for
1600 * us then get us out of STA mode powersave.
1602 if (tim_ucast == 1) {
1604 * Wake us out of SLEEP state if we're
1605 * in it; and if we're doing bgscan
1606 * then wake us out of STA powersave.
1608 ieee80211_sta_tim_notify(vap, 1);
1611 * This is preventing us from
1612 * continuing a bgscan; because it
1613 * tricks the contbgscan()
1614 * routine to think there's always
1617 * I think we need both an RX and
1618 * TX ic_lastdata field.
1620 ic->ic_lastdata = ticks;
1623 ni->ni_dtim_count = tim->tim_count;
1624 ni->ni_dtim_period = tim->tim_period;
1626 if (scan.csa != NULL &&
1627 (vap->iv_flags & IEEE80211_F_DOTH))
1628 ieee80211_parse_csaparams(vap, scan.csa, wh);
1629 else if (ic->ic_flags & IEEE80211_F_CSAPENDING) {
1631 * No CSA ie or 11h disabled, but a channel
1632 * switch is pending; drop out so we aren't
1633 * stuck in CSA state. If the AP really is
1634 * moving we'll get a beacon miss and scan.
1637 ieee80211_csa_cancelswitch(ic);
1638 IEEE80211_UNLOCK(ic);
1641 * If scanning, pass the info to the scan module.
1642 * Otherwise, check if it's the right time to do
1643 * a background scan. Background scanning must
1644 * be enabled and we must not be operating in the
1645 * turbo phase of dynamic turbo mode. Then,
1646 * it's been a while since the last background
1647 * scan and if no data frames have come through
1648 * recently, kick off a scan. Note that this
1649 * is the mechanism by which a background scan
1650 * is started _and_ continued each time we
1651 * return on-channel to receive a beacon from
1654 if (ic->ic_flags & IEEE80211_F_SCAN) {
1655 ieee80211_add_scan(vap, rxchan,
1656 &scan, wh, subtype, rssi, nf);
1657 } else if (contbgscan(vap)) {
1658 ieee80211_bg_scan(vap, 0);
1659 } else if (startbgscan(vap)) {
1660 vap->iv_stats.is_scan_bg++;
1662 /* wakeup if we are sleeing */
1663 ieee80211_set_pwrsave(vap, 0);
1665 ieee80211_bg_scan(vap, 0);
1669 * Put the station to sleep if we haven't seen
1670 * traffic in a while.
1673 ieee80211_sta_ps_timer_check(vap);
1674 IEEE80211_UNLOCK(ic);
1677 * If we've had a channel width change (eg HT20<->HT40)
1678 * then schedule a delayed driver notification.
1680 if (ht_state_change)
1681 ieee80211_update_chw(ic);
1685 * If scanning, just pass information to the scan module.
1687 if (ic->ic_flags & IEEE80211_F_SCAN) {
1688 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
1690 * Actively scanning a channel marked passive;
1691 * send a probe request now that we know there
1692 * is 802.11 traffic present.
1694 * XXX check if the beacon we recv'd gives
1695 * us what we need and suppress the probe req
1697 ieee80211_probe_curchan(vap, 1);
1698 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1700 ieee80211_add_scan(vap, rxchan, &scan, wh,
1707 case IEEE80211_FC0_SUBTYPE_AUTH: {
1708 uint16_t algo, seq, status;
1716 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return);
1717 algo = le16toh(*(uint16_t *)frm);
1718 seq = le16toh(*(uint16_t *)(frm + 2));
1719 status = le16toh(*(uint16_t *)(frm + 4));
1720 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2,
1721 "recv auth frame with algorithm %d seq %d", algo, seq);
1723 if (vap->iv_flags & IEEE80211_F_COUNTERM) {
1724 IEEE80211_DISCARD(vap,
1725 IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO,
1726 wh, "auth", "%s", "TKIP countermeasures enabled");
1727 vap->iv_stats.is_rx_auth_countermeasures++;
1728 if (vap->iv_opmode == IEEE80211_M_HOSTAP) {
1729 ieee80211_send_error(ni, wh->i_addr2,
1730 IEEE80211_FC0_SUBTYPE_AUTH,
1731 IEEE80211_REASON_MIC_FAILURE);
1735 if (algo == IEEE80211_AUTH_ALG_SHARED)
1736 sta_auth_shared(ni, wh, frm + 6, efrm, rssi, nf,
1738 else if (algo == IEEE80211_AUTH_ALG_OPEN)
1739 sta_auth_open(ni, wh, rssi, nf, seq, status);
1741 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1742 wh, "auth", "unsupported alg %d", algo);
1743 vap->iv_stats.is_rx_auth_unsupported++;
1749 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
1750 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: {
1751 uint16_t capinfo, associd;
1754 if (vap->iv_state != IEEE80211_S_ASSOC) {
1755 vap->iv_stats.is_rx_mgtdiscard++;
1760 * asresp frame format
1761 * [2] capability information
1763 * [2] association ID
1764 * [tlv] supported rates
1765 * [tlv] extended supported rates
1767 * [tlv] HT capabilities
1770 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return);
1772 capinfo = le16toh(*(uint16_t *)frm);
1774 status = le16toh(*(uint16_t *)frm);
1777 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC,
1778 wh->i_addr2, "%sassoc failed (reason %d)",
1779 ISREASSOC(subtype) ? "re" : "", status);
1780 vap->iv_stats.is_rx_auth_fail++; /* XXX */
1783 associd = le16toh(*(uint16_t *)frm);
1786 rates = xrates = wme = htcap = htinfo = NULL;
1787 vhtcap = vhtopmode = NULL;
1788 while (efrm - frm > 1) {
1789 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1791 case IEEE80211_ELEMID_RATES:
1794 case IEEE80211_ELEMID_XRATES:
1797 case IEEE80211_ELEMID_HTCAP:
1800 case IEEE80211_ELEMID_HTINFO:
1803 case IEEE80211_ELEMID_VENDOR:
1806 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) {
1808 * Accept pre-draft HT ie's if the
1809 * standard ones have not been seen.
1811 if (ishtcapoui(frm)) {
1814 } else if (ishtinfooui(frm)) {
1819 /* XXX Atheros OUI support */
1821 case IEEE80211_ELEMID_VHT_CAP:
1824 case IEEE80211_ELEMID_VHT_OPMODE:
1831 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
1833 IEEE80211_VERIFY_ELEMENT(xrates,
1834 IEEE80211_RATE_MAXSIZE - rates[1], return);
1835 rate = ieee80211_setup_rates(ni, rates, xrates,
1837 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
1838 IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
1839 if (rate & IEEE80211_RATE_BASIC) {
1840 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC,
1842 "%sassoc failed (rate set mismatch)",
1843 ISREASSOC(subtype) ? "re" : "");
1844 vap->iv_stats.is_rx_assoc_norate++;
1845 ieee80211_new_state(vap, IEEE80211_S_SCAN,
1846 IEEE80211_SCAN_FAIL_STATUS);
1850 ni->ni_capinfo = capinfo;
1851 ni->ni_associd = associd;
1852 if (ni->ni_jointime == 0)
1853 ni->ni_jointime = time_uptime;
1855 ieee80211_parse_wmeparams(vap, wme, wh, &qosinfo) >= 0) {
1856 ni->ni_flags |= IEEE80211_NODE_QOS;
1857 ieee80211_wme_updateparams(vap);
1859 ni->ni_flags &= ~IEEE80211_NODE_QOS;
1861 * Setup HT state according to the negotiation.
1863 * NB: shouldn't need to check if HT use is enabled but some
1864 * ap's send back HT ie's even when we don't indicate we
1865 * are HT capable in our AssocReq.
1867 if (htcap != NULL && htinfo != NULL &&
1868 (vap->iv_flags_ht & IEEE80211_FHT_HT)) {
1869 ieee80211_ht_node_init(ni);
1870 ieee80211_ht_updateparams(ni, htcap, htinfo);
1872 if ((vhtcap != NULL) && (vhtopmode != NULL) &
1873 (vap->iv_flags_vht & IEEE80211_FVHT_VHT)) {
1875 * Log if we get a VHT assoc/reassoc response.
1876 * We aren't ready for 2GHz VHT support.
1878 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) {
1879 printf("%s: peer %6D: VHT on 2GHz, ignoring\n",
1884 ieee80211_vht_node_init(ni);
1885 ieee80211_vht_updateparams(ni, vhtcap, vhtopmode);
1886 ieee80211_setup_vht_rates(ni, vhtcap, vhtopmode);
1890 ieee80211_ht_updateparams_final(ni, htcap, htinfo);
1891 ieee80211_setup_htrates(ni, htcap,
1892 IEEE80211_F_JOIN | IEEE80211_F_DOBRS);
1893 ieee80211_setup_basic_htrates(ni, htinfo);
1895 ieee80211_node_setuptxparms(ni);
1896 ieee80211_ratectl_node_init(ni);
1900 * Always initialise FF/superg state; we can use this
1901 * for doing A-MSDU encapsulation as well.
1903 #ifdef IEEE80211_SUPPORT_SUPERG
1904 ieee80211_ff_node_init(ni);
1908 * Configure state now that we are associated.
1910 * XXX may need different/additional driver callbacks?
1912 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) ||
1913 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) {
1914 vap->iv_flags |= IEEE80211_F_SHPREAMBLE;
1915 vap->iv_flags &= ~IEEE80211_F_USEBARKER;
1917 vap->iv_flags &= ~IEEE80211_F_SHPREAMBLE;
1918 vap->iv_flags |= IEEE80211_F_USEBARKER;
1920 ieee80211_vap_set_shortslottime(vap,
1921 IEEE80211_IS_CHAN_A(ic->ic_curchan) ||
1922 (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME));
1923 ieee80211_vap_update_preamble(vap);
1925 * Honor ERP protection.
1927 * NB: ni_erp should zero for non-11g operation.
1929 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
1930 (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION))
1931 vap->iv_flags |= IEEE80211_F_USEPROT;
1933 vap->iv_flags &= ~IEEE80211_F_USEPROT;
1934 ieee80211_vap_update_erp_protmode(vap);
1935 IEEE80211_NOTE_MAC(vap,
1936 IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, wh->i_addr2,
1937 "%sassoc success at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s%s",
1938 ISREASSOC(subtype) ? "re" : "",
1939 IEEE80211_NODE_AID(ni),
1940 vap->iv_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long",
1941 vap->iv_flags&IEEE80211_F_SHSLOT ? "short" : "long",
1942 vap->iv_flags&IEEE80211_F_USEPROT ? ", protection" : "",
1943 ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "",
1944 ni->ni_flags & IEEE80211_NODE_HT ?
1945 (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "",
1946 ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "",
1947 ni->ni_flags & IEEE80211_NODE_AMSDU ? " (+AMSDU)" : "",
1948 ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" :
1949 ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "",
1950 ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "",
1951 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ?
1952 ", fast-frames" : "",
1953 IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ?
1956 ieee80211_new_state(vap, IEEE80211_S_RUN, subtype);
1960 case IEEE80211_FC0_SUBTYPE_DEAUTH: {
1963 if (vap->iv_state == IEEE80211_S_SCAN) {
1964 vap->iv_stats.is_rx_mgtdiscard++;
1967 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) {
1968 /* NB: can happen when in promiscuous mode */
1969 vap->iv_stats.is_rx_mgtdiscard++;
1974 * deauth frame format
1977 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return);
1978 reason = le16toh(*(uint16_t *)frm);
1980 vap->iv_stats.is_rx_deauth++;
1981 vap->iv_stats.is_rx_deauth_code = reason;
1982 IEEE80211_NODE_STAT(ni, rx_deauth);
1984 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni,
1985 "recv deauthenticate (reason: %d (%s))", reason,
1986 ieee80211_reason_to_string(reason));
1987 ieee80211_new_state(vap, IEEE80211_S_AUTH,
1988 (reason << 8) | IEEE80211_FC0_SUBTYPE_DEAUTH);
1992 case IEEE80211_FC0_SUBTYPE_DISASSOC: {
1995 if (vap->iv_state != IEEE80211_S_RUN &&
1996 vap->iv_state != IEEE80211_S_ASSOC &&
1997 vap->iv_state != IEEE80211_S_AUTH) {
1998 vap->iv_stats.is_rx_mgtdiscard++;
2001 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) {
2002 /* NB: can happen when in promiscuous mode */
2003 vap->iv_stats.is_rx_mgtdiscard++;
2008 * disassoc frame format
2011 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return);
2012 reason = le16toh(*(uint16_t *)frm);
2014 vap->iv_stats.is_rx_disassoc++;
2015 vap->iv_stats.is_rx_disassoc_code = reason;
2016 IEEE80211_NODE_STAT(ni, rx_disassoc);
2018 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
2019 "recv disassociate (reason: %d (%s))", reason,
2020 ieee80211_reason_to_string(reason));
2021 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0);
2025 case IEEE80211_FC0_SUBTYPE_ACTION:
2026 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
2027 if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
2028 !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2029 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2030 wh, NULL, "%s", "not for us");
2031 vap->iv_stats.is_rx_mgtdiscard++;
2032 } else if (vap->iv_state != IEEE80211_S_RUN) {
2033 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2034 wh, NULL, "wrong state %s",
2035 ieee80211_state_name[vap->iv_state]);
2036 vap->iv_stats.is_rx_mgtdiscard++;
2038 if (ieee80211_parse_action(ni, m0) == 0)
2039 (void)ic->ic_recv_action(ni, wh, frm, efrm);
2043 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
2044 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
2045 case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
2046 case IEEE80211_FC0_SUBTYPE_TIMING_ADV:
2047 case IEEE80211_FC0_SUBTYPE_ATIM:
2048 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2049 wh, NULL, "%s", "not handled");
2050 vap->iv_stats.is_rx_mgtdiscard++;
2054 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2055 wh, "mgt", "subtype 0x%x not handled", subtype);
2056 vap->iv_stats.is_rx_badsubtype++;
2063 sta_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
2066 case IEEE80211_FC0_SUBTYPE_BAR:
2067 ieee80211_recv_bar(ni, m);