2 * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
32 * IEEE 802.11 HOSTAP mode support.
37 #include <sys/param.h>
38 #include <sys/systm.h>
40 #include <sys/malloc.h>
41 #include <sys/kernel.h>
43 #include <sys/socket.h>
44 #include <sys/sockio.h>
45 #include <sys/endian.h>
46 #include <sys/errno.h>
48 #include <sys/sysctl.h>
51 #include <net/if_media.h>
52 #include <net/if_llc.h>
53 #include <net/ethernet.h>
57 #include <net80211/ieee80211_var.h>
58 #include <net80211/ieee80211_hostap.h>
59 #include <net80211/ieee80211_input.h>
60 #ifdef IEEE80211_SUPPORT_SUPERG
61 #include <net80211/ieee80211_superg.h>
63 #include <net80211/ieee80211_wds.h>
65 #define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2)
67 static void hostap_vattach(struct ieee80211vap *);
68 static int hostap_newstate(struct ieee80211vap *, enum ieee80211_state, int);
69 static int hostap_input(struct ieee80211_node *ni, struct mbuf *m,
71 static void hostap_deliver_data(struct ieee80211vap *,
72 struct ieee80211_node *, struct mbuf *);
73 static void hostap_recv_mgmt(struct ieee80211_node *, struct mbuf *,
74 int subtype, int rssi, int nf);
75 static void hostap_recv_ctl(struct ieee80211_node *, struct mbuf *, int);
76 static void hostap_recv_pspoll(struct ieee80211_node *, struct mbuf *);
79 ieee80211_hostap_attach(struct ieee80211com *ic)
81 ic->ic_vattach[IEEE80211_M_HOSTAP] = hostap_vattach;
85 ieee80211_hostap_detach(struct ieee80211com *ic)
90 hostap_vdetach(struct ieee80211vap *vap)
95 hostap_vattach(struct ieee80211vap *vap)
97 vap->iv_newstate = hostap_newstate;
98 vap->iv_input = hostap_input;
99 vap->iv_recv_mgmt = hostap_recv_mgmt;
100 vap->iv_recv_ctl = hostap_recv_ctl;
101 vap->iv_opdetach = hostap_vdetach;
102 vap->iv_deliver_data = hostap_deliver_data;
106 sta_disassoc(void *arg, struct ieee80211_node *ni)
108 struct ieee80211vap *vap = arg;
110 if (ni->ni_vap == vap && ni->ni_associd != 0) {
111 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DISASSOC,
112 IEEE80211_REASON_ASSOC_LEAVE);
113 ieee80211_node_leave(ni);
118 sta_csa(void *arg, struct ieee80211_node *ni)
120 struct ieee80211vap *vap = arg;
122 if (ni->ni_vap == vap && ni->ni_associd != 0)
123 if (ni->ni_inact > vap->iv_inact_init) {
124 ni->ni_inact = vap->iv_inact_init;
125 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
126 "%s: inact %u", __func__, ni->ni_inact);
131 sta_drop(void *arg, struct ieee80211_node *ni)
133 struct ieee80211vap *vap = arg;
135 if (ni->ni_vap == vap && ni->ni_associd != 0)
136 ieee80211_node_leave(ni);
140 * Does a channel change require associated stations to re-associate
141 * so protocol state is correct. This is used when doing CSA across
142 * bands or similar (e.g. HT -> legacy).
145 isbandchange(struct ieee80211com *ic)
147 return ((ic->ic_bsschan->ic_flags ^ ic->ic_csa_newchan->ic_flags) &
148 (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_HALF |
149 IEEE80211_CHAN_QUARTER | IEEE80211_CHAN_HT)) != 0;
153 * IEEE80211_M_HOSTAP vap state machine handler.
156 hostap_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
158 struct ieee80211com *ic = vap->iv_ic;
159 enum ieee80211_state ostate;
161 IEEE80211_LOCK_ASSERT(ic);
163 ostate = vap->iv_state;
164 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
165 __func__, ieee80211_state_name[ostate],
166 ieee80211_state_name[nstate], arg);
167 vap->iv_state = nstate; /* state transition */
168 if (ostate != IEEE80211_S_SCAN)
169 ieee80211_cancel_scan(vap); /* background scan */
171 case IEEE80211_S_INIT:
173 case IEEE80211_S_SCAN:
174 ieee80211_cancel_scan(vap);
176 case IEEE80211_S_CAC:
177 ieee80211_dfs_cac_stop(vap);
179 case IEEE80211_S_RUN:
180 ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, vap);
185 if (ostate != IEEE80211_S_INIT) {
186 /* NB: optimize INIT -> INIT case */
187 ieee80211_reset_bss(vap);
189 if (vap->iv_auth->ia_detach != NULL)
190 vap->iv_auth->ia_detach(vap);
192 case IEEE80211_S_SCAN:
194 case IEEE80211_S_CSA:
195 case IEEE80211_S_RUN:
196 ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, vap);
198 * Clear overlapping BSS state; the beacon frame
199 * will be reconstructed on transition to the RUN
200 * state and the timeout routines check if the flag
201 * is set before doing anything so this is sufficient.
203 ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR;
204 ic->ic_flags_ht &= ~IEEE80211_FHT_NONHT_PR;
206 case IEEE80211_S_CAC:
208 * NB: We may get here because of a manual channel
209 * change in which case we need to stop CAC
210 * XXX no need to stop if ostate RUN but it's ok
212 ieee80211_dfs_cac_stop(vap);
214 case IEEE80211_S_INIT:
215 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
216 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan)) {
218 * Already have a channel; bypass the
219 * scan and startup immediately.
220 * ieee80211_create_ibss will call back to
221 * move us to RUN state.
223 ieee80211_create_ibss(vap, vap->iv_des_chan);
227 * Initiate a scan. We can come here as a result
228 * of an IEEE80211_IOC_SCAN_REQ too in which case
229 * the vap will be marked with IEEE80211_FEXT_SCANREQ
230 * and the scan request parameters will be present
231 * in iv_scanreq. Otherwise we do the default.
233 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
234 ieee80211_check_scan(vap,
235 vap->iv_scanreq_flags,
236 vap->iv_scanreq_duration,
237 vap->iv_scanreq_mindwell,
238 vap->iv_scanreq_maxdwell,
239 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
240 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
242 ieee80211_check_scan_current(vap);
244 case IEEE80211_S_SCAN:
246 * A state change requires a reset; scan.
248 ieee80211_check_scan_current(vap);
254 case IEEE80211_S_CAC:
256 * Start CAC on a DFS channel. We come here when starting
257 * a bss on a DFS channel (see ieee80211_create_ibss).
259 ieee80211_dfs_cac_start(vap);
261 case IEEE80211_S_RUN:
262 if (vap->iv_flags & IEEE80211_F_WPA) {
263 /* XXX validate prerequisites */
266 case IEEE80211_S_INIT:
268 * Already have a channel; bypass the
269 * scan and startup immediately.
270 * Note that ieee80211_create_ibss will call
271 * back to do a RUN->RUN state change.
273 ieee80211_create_ibss(vap,
274 ieee80211_ht_adjust_channel(ic,
275 ic->ic_curchan, vap->iv_flags_ht));
276 /* NB: iv_bss is changed on return */
278 case IEEE80211_S_CAC:
280 * NB: This is the normal state change when CAC
281 * expires and no radar was detected; no need to
282 * clear the CAC timer as it's already expired.
285 case IEEE80211_S_CSA:
287 * Shorten inactivity timer of associated stations
288 * to weed out sta's that don't follow a CSA.
290 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
292 * Update bss node channel to reflect where
293 * we landed after CSA.
295 ieee80211_node_set_chan(vap->iv_bss,
296 ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
297 ieee80211_htchanflags(vap->iv_bss->ni_chan)));
298 /* XXX bypass debug msgs */
300 case IEEE80211_S_SCAN:
301 case IEEE80211_S_RUN:
302 #ifdef IEEE80211_DEBUG
303 if (ieee80211_msg_debug(vap)) {
304 struct ieee80211_node *ni = vap->iv_bss;
306 "synchronized with %s ssid ",
307 ether_sprintf(ni->ni_bssid));
308 ieee80211_print_essid(ni->ni_essid,
311 printf(" channel %d start %uMb\n",
312 ieee80211_chan2ieee(ic, ic->ic_curchan),
313 IEEE80211_RATE2MBS(ni->ni_txrate));
321 * Start/stop the authenticator. We delay until here
322 * to allow configuration to happen out of order.
324 if (vap->iv_auth->ia_attach != NULL) {
325 /* XXX check failure */
326 vap->iv_auth->ia_attach(vap);
327 } else if (vap->iv_auth->ia_detach != NULL) {
328 vap->iv_auth->ia_detach(vap);
330 ieee80211_node_authorize(vap->iv_bss);
332 case IEEE80211_S_CSA:
333 if (ostate == IEEE80211_S_RUN && isbandchange(ic)) {
335 * On a ``band change'' silently drop associated
336 * stations as they must re-associate before they
337 * can pass traffic (as otherwise protocol state
338 * such as capabilities and the negotiated rate
339 * set may/will be wrong).
341 ieee80211_iterate_nodes(&ic->ic_sta, sta_drop, vap);
351 hostap_deliver_data(struct ieee80211vap *vap,
352 struct ieee80211_node *ni, struct mbuf *m)
354 struct ether_header *eh = mtod(m, struct ether_header *);
355 struct ifnet *ifp = vap->iv_ifp;
357 /* clear driver/net80211 flags before passing up */
358 m->m_flags &= ~(M_80211_RX | M_MCAST | M_BCAST);
360 KASSERT(vap->iv_opmode == IEEE80211_M_HOSTAP,
361 ("gack, opmode %d", vap->iv_opmode));
366 IEEE80211_NODE_STAT(ni, rx_data);
367 IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len);
368 if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
369 m->m_flags |= M_MCAST; /* XXX M_BCAST? */
370 IEEE80211_NODE_STAT(ni, rx_mcast);
372 IEEE80211_NODE_STAT(ni, rx_ucast);
374 /* perform as a bridge within the AP */
375 if ((vap->iv_flags & IEEE80211_F_NOBRIDGE) == 0) {
376 struct mbuf *mcopy = NULL;
378 if (m->m_flags & M_MCAST) {
379 mcopy = m_dup(m, M_DONTWAIT);
383 mcopy->m_flags |= M_MCAST;
386 * Check if the destination is associated with the
387 * same vap and authorized to receive traffic.
388 * Beware of traffic destined for the vap itself;
389 * sending it will not work; just let it be delivered
392 struct ieee80211_node *sta = ieee80211_find_vap_node(
393 &vap->iv_ic->ic_sta, vap, eh->ether_dhost);
395 if (ieee80211_node_is_authorized(sta)) {
397 * Beware of sending to ourself; this
398 * needs to happen via the normal
401 if (sta != vap->iv_bss) {
406 vap->iv_stats.is_rx_unauth++;
407 IEEE80211_NODE_STAT(sta, rx_unauth);
409 ieee80211_free_node(sta);
414 len = mcopy->m_pkthdr.len;
415 err = ifp->if_transmit(ifp, mcopy);
417 /* NB: IFQ_HANDOFF reclaims mcopy */
425 * Mark frame as coming from vap's interface.
427 m->m_pkthdr.rcvif = ifp;
428 if (m->m_flags & M_MCAST) {
430 * Spam DWDS vap's w/ multicast traffic.
432 /* XXX only if dwds in use? */
433 ieee80211_dwds_mcast(vap, m);
435 if (ni->ni_vlan != 0) {
436 /* attach vlan tag */
437 m->m_pkthdr.ether_vtag = ni->ni_vlan;
438 m->m_flags |= M_VLANTAG;
440 ifp->if_input(ifp, m);
445 * Decide if a received management frame should be
446 * printed when debugging is enabled. This filters some
447 * of the less interesting frames that come frequently
451 doprint(struct ieee80211vap *vap, int subtype)
454 case IEEE80211_FC0_SUBTYPE_BEACON:
455 return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN);
456 case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
463 * Process a received frame. The node associated with the sender
464 * should be supplied. If nothing was found in the node table then
465 * the caller is assumed to supply a reference to iv_bss instead.
466 * The RSSI and a timestamp are also supplied. The RSSI data is used
467 * during AP scanning to select a AP to associate with; it can have
468 * any units so long as values have consistent units and higher values
469 * mean ``better signal''. The receive timestamp is currently not used
470 * by the 802.11 layer.
473 hostap_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf)
475 #define HAS_SEQ(type) ((type & 0x4) == 0)
476 struct ieee80211vap *vap = ni->ni_vap;
477 struct ieee80211com *ic = ni->ni_ic;
478 struct ifnet *ifp = vap->iv_ifp;
479 struct ieee80211_frame *wh;
480 struct ieee80211_key *key;
481 struct ether_header *eh;
482 int hdrspace, need_tap = 1; /* mbuf need to be tapped. */
483 uint8_t dir, type, subtype, qos;
487 if (m->m_flags & M_AMPDU_MPDU) {
489 * Fastpath for A-MPDU reorder q resubmission. Frames
490 * w/ M_AMPDU_MPDU marked have already passed through
491 * here but were received out of order and been held on
492 * the reorder queue. When resubmitted they are marked
493 * with the M_AMPDU_MPDU flag and we can bypass most of
494 * the normal processing.
496 wh = mtod(m, struct ieee80211_frame *);
497 type = IEEE80211_FC0_TYPE_DATA;
498 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
499 subtype = IEEE80211_FC0_SUBTYPE_QOS;
500 hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */
504 KASSERT(ni != NULL, ("null node"));
505 ni->ni_inact = ni->ni_inact_reload;
507 type = -1; /* undefined */
509 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
510 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
511 ni->ni_macaddr, NULL,
512 "too short (1): len %u", m->m_pkthdr.len);
513 vap->iv_stats.is_rx_tooshort++;
517 * Bit of a cheat here, we use a pointer for a 3-address
518 * frame format but don't reference fields past outside
519 * ieee80211_frame_min w/o first validating the data is
522 wh = mtod(m, struct ieee80211_frame *);
524 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
525 IEEE80211_FC0_VERSION_0) {
526 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
527 ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x",
528 wh->i_fc[0], wh->i_fc[1]);
529 vap->iv_stats.is_rx_badversion++;
533 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
534 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
535 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
536 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
537 if (dir != IEEE80211_FC1_DIR_NODS)
539 else if (type == IEEE80211_FC0_TYPE_CTL)
542 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
543 IEEE80211_DISCARD_MAC(vap,
544 IEEE80211_MSG_ANY, ni->ni_macaddr,
545 NULL, "too short (2): len %u",
547 vap->iv_stats.is_rx_tooshort++;
553 * Validate the bssid.
555 if (!(type == IEEE80211_FC0_TYPE_MGT &&
556 subtype == IEEE80211_FC0_SUBTYPE_BEACON) &&
557 !IEEE80211_ADDR_EQ(bssid, vap->iv_bss->ni_bssid) &&
558 !IEEE80211_ADDR_EQ(bssid, ifp->if_broadcastaddr)) {
559 /* not interested in */
560 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
561 bssid, NULL, "%s", "not to bss");
562 vap->iv_stats.is_rx_wrongbss++;
566 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
569 uint8_t tid = ieee80211_gettid(wh);
570 if (IEEE80211_QOS_HAS_SEQ(wh) &&
571 TID_TO_WME_AC(tid) >= WME_AC_VI)
572 ic->ic_wme.wme_hipri_traffic++;
573 rxseq = le16toh(*(uint16_t *)wh->i_seq);
574 if (! ieee80211_check_rxseq(ni, wh)) {
575 /* duplicate, discard */
576 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
578 "seqno <%u,%u> fragno <%u,%u> tid %u",
579 rxseq >> IEEE80211_SEQ_SEQ_SHIFT,
580 ni->ni_rxseqs[tid] >>
581 IEEE80211_SEQ_SEQ_SHIFT,
582 rxseq & IEEE80211_SEQ_FRAG_MASK,
584 IEEE80211_SEQ_FRAG_MASK,
586 vap->iv_stats.is_rx_dup++;
587 IEEE80211_NODE_STAT(ni, rx_dup);
590 ni->ni_rxseqs[tid] = rxseq;
595 case IEEE80211_FC0_TYPE_DATA:
596 hdrspace = ieee80211_hdrspace(ic, wh);
597 if (m->m_len < hdrspace &&
598 (m = m_pullup(m, hdrspace)) == NULL) {
599 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
600 ni->ni_macaddr, NULL,
601 "data too short: expecting %u", hdrspace);
602 vap->iv_stats.is_rx_tooshort++;
605 if (!(dir == IEEE80211_FC1_DIR_TODS ||
606 (dir == IEEE80211_FC1_DIR_DSTODS &&
607 (vap->iv_flags & IEEE80211_F_DWDS)))) {
608 if (dir != IEEE80211_FC1_DIR_DSTODS) {
609 IEEE80211_DISCARD(vap,
610 IEEE80211_MSG_INPUT, wh, "data",
611 "incorrect dir 0x%x", dir);
613 IEEE80211_DISCARD(vap,
614 IEEE80211_MSG_INPUT |
615 IEEE80211_MSG_WDS, wh,
617 "%s", "DWDS not enabled");
619 vap->iv_stats.is_rx_wrongdir++;
622 /* check if source STA is associated */
623 if (ni == vap->iv_bss) {
624 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
625 wh, "data", "%s", "unknown src");
626 ieee80211_send_error(ni, wh->i_addr2,
627 IEEE80211_FC0_SUBTYPE_DEAUTH,
628 IEEE80211_REASON_NOT_AUTHED);
629 vap->iv_stats.is_rx_notassoc++;
632 if (ni->ni_associd == 0) {
633 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
634 wh, "data", "%s", "unassoc src");
635 IEEE80211_SEND_MGMT(ni,
636 IEEE80211_FC0_SUBTYPE_DISASSOC,
637 IEEE80211_REASON_NOT_ASSOCED);
638 vap->iv_stats.is_rx_notassoc++;
643 * Check for power save state change.
644 * XXX out-of-order A-MPDU frames?
646 if (((wh->i_fc[1] & IEEE80211_FC1_PWR_MGT) ^
647 (ni->ni_flags & IEEE80211_NODE_PWR_MGT)))
648 ieee80211_node_pwrsave(ni,
649 wh->i_fc[1] & IEEE80211_FC1_PWR_MGT);
651 * For 4-address packets handle WDS discovery
652 * notifications. Once a WDS link is setup frames
653 * are just delivered to the WDS vap (see below).
655 if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap == NULL) {
656 if (!ieee80211_node_is_authorized(ni)) {
657 IEEE80211_DISCARD(vap,
658 IEEE80211_MSG_INPUT |
659 IEEE80211_MSG_WDS, wh,
661 "%s", "unauthorized port");
662 vap->iv_stats.is_rx_unauth++;
663 IEEE80211_NODE_STAT(ni, rx_unauth);
666 ieee80211_dwds_discover(ni, m);
671 * Handle A-MPDU re-ordering. If the frame is to be
672 * processed directly then ieee80211_ampdu_reorder
673 * will return 0; otherwise it has consumed the mbuf
674 * and we should do nothing more with it.
676 if ((m->m_flags & M_AMPDU) &&
677 ieee80211_ampdu_reorder(ni, m) != 0) {
684 * Handle privacy requirements. Note that we
685 * must not be preempted from here until after
686 * we (potentially) call ieee80211_crypto_demic;
687 * otherwise we may violate assumptions in the
688 * crypto cipher modules used to do delayed update
689 * of replay sequence numbers.
691 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
692 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
694 * Discard encrypted frames when privacy is off.
696 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
697 wh, "WEP", "%s", "PRIVACY off");
698 vap->iv_stats.is_rx_noprivacy++;
699 IEEE80211_NODE_STAT(ni, rx_noprivacy);
702 key = ieee80211_crypto_decap(ni, m, hdrspace);
704 /* NB: stats+msgs handled in crypto_decap */
705 IEEE80211_NODE_STAT(ni, rx_wepfail);
708 wh = mtod(m, struct ieee80211_frame *);
709 wh->i_fc[1] &= ~IEEE80211_FC1_WEP;
711 /* XXX M_WEP and IEEE80211_F_PRIVACY */
716 * Save QoS bits for use below--before we strip the header.
718 if (subtype == IEEE80211_FC0_SUBTYPE_QOS) {
719 qos = (dir == IEEE80211_FC1_DIR_DSTODS) ?
720 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] :
721 ((struct ieee80211_qosframe *)wh)->i_qos[0];
726 * Next up, any fragmentation.
728 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
729 m = ieee80211_defrag(ni, m, hdrspace);
731 /* Fragment dropped or frame not complete yet */
735 wh = NULL; /* no longer valid, catch any uses */
738 * Next strip any MSDU crypto bits.
740 if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) {
741 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
742 ni->ni_macaddr, "data", "%s", "demic error");
743 vap->iv_stats.is_rx_demicfail++;
744 IEEE80211_NODE_STAT(ni, rx_demicfail);
747 /* copy to listener after decrypt */
748 if (ieee80211_radiotap_active_vap(vap))
749 ieee80211_radiotap_rx(vap, m);
752 * Finally, strip the 802.11 header.
754 m = ieee80211_decap(vap, m, hdrspace);
756 /* XXX mask bit to check for both */
757 /* don't count Null data frames as errors */
758 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
759 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
761 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
762 ni->ni_macaddr, "data", "%s", "decap error");
763 vap->iv_stats.is_rx_decap++;
764 IEEE80211_NODE_STAT(ni, rx_decap);
767 eh = mtod(m, struct ether_header *);
768 if (!ieee80211_node_is_authorized(ni)) {
770 * Deny any non-PAE frames received prior to
771 * authorization. For open/shared-key
772 * authentication the port is mark authorized
773 * after authentication completes. For 802.1x
774 * the port is not marked authorized by the
775 * authenticator until the handshake has completed.
777 if (eh->ether_type != htons(ETHERTYPE_PAE)) {
778 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
779 eh->ether_shost, "data",
780 "unauthorized port: ether type 0x%x len %u",
781 eh->ether_type, m->m_pkthdr.len);
782 vap->iv_stats.is_rx_unauth++;
783 IEEE80211_NODE_STAT(ni, rx_unauth);
788 * When denying unencrypted frames, discard
789 * any non-PAE frames received without encryption.
791 if ((vap->iv_flags & IEEE80211_F_DROPUNENC) &&
792 (key == NULL && (m->m_flags & M_WEP) == 0) &&
793 eh->ether_type != htons(ETHERTYPE_PAE)) {
795 * Drop unencrypted frames.
797 vap->iv_stats.is_rx_unencrypted++;
798 IEEE80211_NODE_STAT(ni, rx_unencrypted);
802 /* XXX require HT? */
803 if (qos & IEEE80211_QOS_AMSDU) {
804 m = ieee80211_decap_amsdu(ni, m);
806 return IEEE80211_FC0_TYPE_DATA;
808 #ifdef IEEE80211_SUPPORT_SUPERG
809 m = ieee80211_decap_fastframe(vap, ni, m);
811 return IEEE80211_FC0_TYPE_DATA;
814 if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap != NULL)
815 ieee80211_deliver_data(ni->ni_wdsvap, ni, m);
817 hostap_deliver_data(vap, ni, m);
818 return IEEE80211_FC0_TYPE_DATA;
820 case IEEE80211_FC0_TYPE_MGT:
821 vap->iv_stats.is_rx_mgmt++;
822 IEEE80211_NODE_STAT(ni, rx_mgmt);
823 if (dir != IEEE80211_FC1_DIR_NODS) {
824 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
825 wh, "mgt", "incorrect dir 0x%x", dir);
826 vap->iv_stats.is_rx_wrongdir++;
829 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
830 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
831 ni->ni_macaddr, "mgt", "too short: len %u",
833 vap->iv_stats.is_rx_tooshort++;
836 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
837 /* ensure return frames are unicast */
838 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
839 wh, NULL, "source is multicast: %s",
840 ether_sprintf(wh->i_addr2));
841 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */
844 #ifdef IEEE80211_DEBUG
845 if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) ||
846 ieee80211_msg_dumppkts(vap)) {
847 if_printf(ifp, "received %s from %s rssi %d\n",
848 ieee80211_mgt_subtype_name[subtype >>
849 IEEE80211_FC0_SUBTYPE_SHIFT],
850 ether_sprintf(wh->i_addr2), rssi);
853 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
854 if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) {
856 * Only shared key auth frames with a challenge
857 * should be encrypted, discard all others.
859 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
861 "%s", "WEP set but not permitted");
862 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
865 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
867 * Discard encrypted frames when privacy is off.
869 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
870 wh, NULL, "%s", "WEP set but PRIVACY off");
871 vap->iv_stats.is_rx_noprivacy++;
874 hdrspace = ieee80211_hdrspace(ic, wh);
875 key = ieee80211_crypto_decap(ni, m, hdrspace);
877 /* NB: stats+msgs handled in crypto_decap */
880 wh = mtod(m, struct ieee80211_frame *);
881 wh->i_fc[1] &= ~IEEE80211_FC1_WEP;
884 * Pass the packet to radiotap before calling iv_recv_mgmt().
885 * Otherwise iv_recv_mgmt() might pass another packet to
886 * radiotap, resulting in out of order packet captures.
888 if (ieee80211_radiotap_active_vap(vap))
889 ieee80211_radiotap_rx(vap, m);
891 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf);
894 case IEEE80211_FC0_TYPE_CTL:
895 vap->iv_stats.is_rx_ctl++;
896 IEEE80211_NODE_STAT(ni, rx_ctrl);
897 vap->iv_recv_ctl(ni, m, subtype);
900 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
901 wh, "bad", "frame type 0x%x", type);
902 /* should not come here */
909 if (need_tap && ieee80211_radiotap_active_vap(vap))
910 ieee80211_radiotap_rx(vap, m);
917 hostap_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh,
918 int rssi, int nf, uint16_t seq, uint16_t status)
920 struct ieee80211vap *vap = ni->ni_vap;
922 KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state));
924 if (ni->ni_authmode == IEEE80211_AUTH_SHARED) {
925 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
926 ni->ni_macaddr, "open auth",
927 "bad sta auth mode %u", ni->ni_authmode);
928 vap->iv_stats.is_rx_bad_auth++; /* XXX */
930 * Clear any challenge text that may be there if
931 * a previous shared key auth failed and then an
932 * open auth is attempted.
934 if (ni->ni_challenge != NULL) {
935 free(ni->ni_challenge, M_80211_NODE);
936 ni->ni_challenge = NULL;
938 /* XXX hack to workaround calling convention */
939 ieee80211_send_error(ni, wh->i_addr2,
940 IEEE80211_FC0_SUBTYPE_AUTH,
941 (seq + 1) | (IEEE80211_STATUS_ALG<<16));
944 if (seq != IEEE80211_AUTH_OPEN_REQUEST) {
945 vap->iv_stats.is_rx_bad_auth++;
948 /* always accept open authentication requests */
949 if (ni == vap->iv_bss) {
950 ni = ieee80211_dup_bss(vap, wh->i_addr2);
953 } else if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0)
954 (void) ieee80211_ref_node(ni);
956 * Mark the node as referenced to reflect that it's
957 * reference count has been bumped to insure it remains
958 * after the transaction completes.
960 ni->ni_flags |= IEEE80211_NODE_AREF;
962 * Mark the node as requiring a valid association id
963 * before outbound traffic is permitted.
965 ni->ni_flags |= IEEE80211_NODE_ASSOCID;
967 if (vap->iv_acl != NULL &&
968 vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) {
970 * When the ACL policy is set to RADIUS we defer the
971 * authorization to a user agent. Dispatch an event,
972 * a subsequent MLME call will decide the fate of the
973 * station. If the user agent is not present then the
974 * node will be reclaimed due to inactivity.
976 IEEE80211_NOTE_MAC(vap,
977 IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, ni->ni_macaddr,
978 "%s", "station authentication defered (radius acl)");
979 ieee80211_notify_node_auth(ni);
981 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1);
982 IEEE80211_NOTE_MAC(vap,
983 IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni->ni_macaddr,
984 "%s", "station authenticated (open)");
986 * When 802.1x is not in use mark the port
987 * authorized at this point so traffic can flow.
989 if (ni->ni_authmode != IEEE80211_AUTH_8021X)
990 ieee80211_node_authorize(ni);
995 hostap_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh,
996 uint8_t *frm, uint8_t *efrm, int rssi, int nf,
997 uint16_t seq, uint16_t status)
999 struct ieee80211vap *vap = ni->ni_vap;
1001 int allocbs, estatus;
1003 KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state));
1006 * NB: this can happen as we allow pre-shared key
1007 * authentication to be enabled w/o wep being turned
1008 * on so that configuration of these can be done
1009 * in any order. It may be better to enforce the
1010 * ordering in which case this check would just be
1011 * for sanity/consistency.
1013 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
1014 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1015 ni->ni_macaddr, "shared key auth",
1016 "%s", " PRIVACY is disabled");
1017 estatus = IEEE80211_STATUS_ALG;
1021 * Pre-shared key authentication is evil; accept
1022 * it only if explicitly configured (it is supported
1023 * mainly for compatibility with clients like Mac OS X).
1025 if (ni->ni_authmode != IEEE80211_AUTH_AUTO &&
1026 ni->ni_authmode != IEEE80211_AUTH_SHARED) {
1027 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1028 ni->ni_macaddr, "shared key auth",
1029 "bad sta auth mode %u", ni->ni_authmode);
1030 vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */
1031 estatus = IEEE80211_STATUS_ALG;
1036 if (frm + 1 < efrm) {
1037 if ((frm[1] + 2) > (efrm - frm)) {
1038 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1039 ni->ni_macaddr, "shared key auth",
1040 "ie %d/%d too long",
1041 frm[0], (frm[1] + 2) - (efrm - frm));
1042 vap->iv_stats.is_rx_bad_auth++;
1043 estatus = IEEE80211_STATUS_CHALLENGE;
1046 if (*frm == IEEE80211_ELEMID_CHALLENGE)
1051 case IEEE80211_AUTH_SHARED_CHALLENGE:
1052 case IEEE80211_AUTH_SHARED_RESPONSE:
1053 if (challenge == NULL) {
1054 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1055 ni->ni_macaddr, "shared key auth",
1056 "%s", "no challenge");
1057 vap->iv_stats.is_rx_bad_auth++;
1058 estatus = IEEE80211_STATUS_CHALLENGE;
1061 if (challenge[1] != IEEE80211_CHALLENGE_LEN) {
1062 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1063 ni->ni_macaddr, "shared key auth",
1064 "bad challenge len %d", challenge[1]);
1065 vap->iv_stats.is_rx_bad_auth++;
1066 estatus = IEEE80211_STATUS_CHALLENGE;
1073 case IEEE80211_AUTH_SHARED_REQUEST:
1074 if (ni == vap->iv_bss) {
1075 ni = ieee80211_dup_bss(vap, wh->i_addr2);
1077 /* NB: no way to return an error */
1082 if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0)
1083 (void) ieee80211_ref_node(ni);
1087 * Mark the node as referenced to reflect that it's
1088 * reference count has been bumped to insure it remains
1089 * after the transaction completes.
1091 ni->ni_flags |= IEEE80211_NODE_AREF;
1093 * Mark the node as requiring a valid associatio id
1094 * before outbound traffic is permitted.
1096 ni->ni_flags |= IEEE80211_NODE_ASSOCID;
1097 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1099 if (!ieee80211_alloc_challenge(ni)) {
1100 /* NB: don't return error so they rexmit */
1103 get_random_bytes(ni->ni_challenge,
1104 IEEE80211_CHALLENGE_LEN);
1105 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH,
1106 ni, "shared key %sauth request", allocbs ? "" : "re");
1108 * When the ACL policy is set to RADIUS we defer the
1109 * authorization to a user agent. Dispatch an event,
1110 * a subsequent MLME call will decide the fate of the
1111 * station. If the user agent is not present then the
1112 * node will be reclaimed due to inactivity.
1114 if (vap->iv_acl != NULL &&
1115 vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) {
1116 IEEE80211_NOTE_MAC(vap,
1117 IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL,
1119 "%s", "station authentication defered (radius acl)");
1120 ieee80211_notify_node_auth(ni);
1124 case IEEE80211_AUTH_SHARED_RESPONSE:
1125 if (ni == vap->iv_bss) {
1126 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1127 ni->ni_macaddr, "shared key response",
1128 "%s", "unknown station");
1129 /* NB: don't send a response */
1132 if (ni->ni_challenge == NULL) {
1133 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1134 ni->ni_macaddr, "shared key response",
1135 "%s", "no challenge recorded");
1136 vap->iv_stats.is_rx_bad_auth++;
1137 estatus = IEEE80211_STATUS_CHALLENGE;
1140 if (memcmp(ni->ni_challenge, &challenge[2],
1141 challenge[1]) != 0) {
1142 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1143 ni->ni_macaddr, "shared key response",
1144 "%s", "challenge mismatch");
1145 vap->iv_stats.is_rx_auth_fail++;
1146 estatus = IEEE80211_STATUS_CHALLENGE;
1149 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH,
1150 ni, "%s", "station authenticated (shared key)");
1151 ieee80211_node_authorize(ni);
1154 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1155 ni->ni_macaddr, "shared key auth",
1157 vap->iv_stats.is_rx_bad_auth++;
1158 estatus = IEEE80211_STATUS_SEQUENCE;
1161 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1);
1165 * Send an error response; but only when operating as an AP.
1167 /* XXX hack to workaround calling convention */
1168 ieee80211_send_error(ni, wh->i_addr2,
1169 IEEE80211_FC0_SUBTYPE_AUTH,
1170 (seq + 1) | (estatus<<16));
1174 * Convert a WPA cipher selector OUI to an internal
1175 * cipher algorithm. Where appropriate we also
1176 * record any key length.
1179 wpa_cipher(const uint8_t *sel, uint8_t *keylen)
1181 #define WPA_SEL(x) (((x)<<24)|WPA_OUI)
1182 uint32_t w = LE_READ_4(sel);
1185 case WPA_SEL(WPA_CSE_NULL):
1186 return IEEE80211_CIPHER_NONE;
1187 case WPA_SEL(WPA_CSE_WEP40):
1189 *keylen = 40 / NBBY;
1190 return IEEE80211_CIPHER_WEP;
1191 case WPA_SEL(WPA_CSE_WEP104):
1193 *keylen = 104 / NBBY;
1194 return IEEE80211_CIPHER_WEP;
1195 case WPA_SEL(WPA_CSE_TKIP):
1196 return IEEE80211_CIPHER_TKIP;
1197 case WPA_SEL(WPA_CSE_CCMP):
1198 return IEEE80211_CIPHER_AES_CCM;
1200 return 32; /* NB: so 1<< is discarded */
1205 * Convert a WPA key management/authentication algorithm
1206 * to an internal code.
1209 wpa_keymgmt(const uint8_t *sel)
1211 #define WPA_SEL(x) (((x)<<24)|WPA_OUI)
1212 uint32_t w = LE_READ_4(sel);
1215 case WPA_SEL(WPA_ASE_8021X_UNSPEC):
1216 return WPA_ASE_8021X_UNSPEC;
1217 case WPA_SEL(WPA_ASE_8021X_PSK):
1218 return WPA_ASE_8021X_PSK;
1219 case WPA_SEL(WPA_ASE_NONE):
1220 return WPA_ASE_NONE;
1222 return 0; /* NB: so is discarded */
1227 * Parse a WPA information element to collect parameters.
1228 * Note that we do not validate security parameters; that
1229 * is handled by the authenticator; the parsing done here
1230 * is just for internal use in making operational decisions.
1233 ieee80211_parse_wpa(struct ieee80211vap *vap, const uint8_t *frm,
1234 struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh)
1236 uint8_t len = frm[1];
1241 * Check the length once for fixed parts: OUI, type,
1242 * version, mcast cipher, and 2 selector counts.
1243 * Other, variable-length data, must be checked separately.
1245 if ((vap->iv_flags & IEEE80211_F_WPA1) == 0) {
1246 IEEE80211_DISCARD_IE(vap,
1247 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1248 wh, "WPA", "not WPA, flags 0x%x", vap->iv_flags);
1249 return IEEE80211_REASON_IE_INVALID;
1252 IEEE80211_DISCARD_IE(vap,
1253 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1254 wh, "WPA", "too short, len %u", len);
1255 return IEEE80211_REASON_IE_INVALID;
1257 frm += 6, len -= 4; /* NB: len is payload only */
1258 /* NB: iswpaoui already validated the OUI and type */
1260 if (w != WPA_VERSION) {
1261 IEEE80211_DISCARD_IE(vap,
1262 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1263 wh, "WPA", "bad version %u", w);
1264 return IEEE80211_REASON_IE_INVALID;
1268 memset(rsn, 0, sizeof(*rsn));
1270 /* multicast/group cipher */
1271 rsn->rsn_mcastcipher = wpa_cipher(frm, &rsn->rsn_mcastkeylen);
1274 /* unicast ciphers */
1278 IEEE80211_DISCARD_IE(vap,
1279 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1280 wh, "WPA", "ucast cipher data too short; len %u, n %u",
1282 return IEEE80211_REASON_IE_INVALID;
1285 for (; n > 0; n--) {
1286 w |= 1<<wpa_cipher(frm, &rsn->rsn_ucastkeylen);
1289 if (w & (1<<IEEE80211_CIPHER_TKIP))
1290 rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP;
1292 rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM;
1294 /* key management algorithms */
1298 IEEE80211_DISCARD_IE(vap,
1299 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1300 wh, "WPA", "key mgmt alg data too short; len %u, n %u",
1302 return IEEE80211_REASON_IE_INVALID;
1305 for (; n > 0; n--) {
1306 w |= wpa_keymgmt(frm);
1309 if (w & WPA_ASE_8021X_UNSPEC)
1310 rsn->rsn_keymgmt = WPA_ASE_8021X_UNSPEC;
1312 rsn->rsn_keymgmt = WPA_ASE_8021X_PSK;
1314 if (len > 2) /* optional capabilities */
1315 rsn->rsn_caps = LE_READ_2(frm);
1321 * Convert an RSN cipher selector OUI to an internal
1322 * cipher algorithm. Where appropriate we also
1323 * record any key length.
1326 rsn_cipher(const uint8_t *sel, uint8_t *keylen)
1328 #define RSN_SEL(x) (((x)<<24)|RSN_OUI)
1329 uint32_t w = LE_READ_4(sel);
1332 case RSN_SEL(RSN_CSE_NULL):
1333 return IEEE80211_CIPHER_NONE;
1334 case RSN_SEL(RSN_CSE_WEP40):
1336 *keylen = 40 / NBBY;
1337 return IEEE80211_CIPHER_WEP;
1338 case RSN_SEL(RSN_CSE_WEP104):
1340 *keylen = 104 / NBBY;
1341 return IEEE80211_CIPHER_WEP;
1342 case RSN_SEL(RSN_CSE_TKIP):
1343 return IEEE80211_CIPHER_TKIP;
1344 case RSN_SEL(RSN_CSE_CCMP):
1345 return IEEE80211_CIPHER_AES_CCM;
1346 case RSN_SEL(RSN_CSE_WRAP):
1347 return IEEE80211_CIPHER_AES_OCB;
1349 return 32; /* NB: so 1<< is discarded */
1354 * Convert an RSN key management/authentication algorithm
1355 * to an internal code.
1358 rsn_keymgmt(const uint8_t *sel)
1360 #define RSN_SEL(x) (((x)<<24)|RSN_OUI)
1361 uint32_t w = LE_READ_4(sel);
1364 case RSN_SEL(RSN_ASE_8021X_UNSPEC):
1365 return RSN_ASE_8021X_UNSPEC;
1366 case RSN_SEL(RSN_ASE_8021X_PSK):
1367 return RSN_ASE_8021X_PSK;
1368 case RSN_SEL(RSN_ASE_NONE):
1369 return RSN_ASE_NONE;
1371 return 0; /* NB: so is discarded */
1376 * Parse a WPA/RSN information element to collect parameters
1377 * and validate the parameters against what has been
1378 * configured for the system.
1381 ieee80211_parse_rsn(struct ieee80211vap *vap, const uint8_t *frm,
1382 struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh)
1384 uint8_t len = frm[1];
1389 * Check the length once for fixed parts:
1390 * version, mcast cipher, and 2 selector counts.
1391 * Other, variable-length data, must be checked separately.
1393 if ((vap->iv_flags & IEEE80211_F_WPA2) == 0) {
1394 IEEE80211_DISCARD_IE(vap,
1395 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1396 wh, "WPA", "not RSN, flags 0x%x", vap->iv_flags);
1397 return IEEE80211_REASON_IE_INVALID;
1400 IEEE80211_DISCARD_IE(vap,
1401 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1402 wh, "RSN", "too short, len %u", len);
1403 return IEEE80211_REASON_IE_INVALID;
1407 if (w != RSN_VERSION) {
1408 IEEE80211_DISCARD_IE(vap,
1409 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1410 wh, "RSN", "bad version %u", w);
1411 return IEEE80211_REASON_IE_INVALID;
1415 memset(rsn, 0, sizeof(*rsn));
1417 /* multicast/group cipher */
1418 rsn->rsn_mcastcipher = rsn_cipher(frm, &rsn->rsn_mcastkeylen);
1421 /* unicast ciphers */
1425 IEEE80211_DISCARD_IE(vap,
1426 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1427 wh, "RSN", "ucast cipher data too short; len %u, n %u",
1429 return IEEE80211_REASON_IE_INVALID;
1432 for (; n > 0; n--) {
1433 w |= 1<<rsn_cipher(frm, &rsn->rsn_ucastkeylen);
1436 if (w & (1<<IEEE80211_CIPHER_TKIP))
1437 rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP;
1439 rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM;
1441 /* key management algorithms */
1445 IEEE80211_DISCARD_IE(vap,
1446 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1447 wh, "RSN", "key mgmt alg data too short; len %u, n %u",
1449 return IEEE80211_REASON_IE_INVALID;
1452 for (; n > 0; n--) {
1453 w |= rsn_keymgmt(frm);
1456 if (w & RSN_ASE_8021X_UNSPEC)
1457 rsn->rsn_keymgmt = RSN_ASE_8021X_UNSPEC;
1459 rsn->rsn_keymgmt = RSN_ASE_8021X_PSK;
1461 /* optional RSN capabilities */
1463 rsn->rsn_caps = LE_READ_2(frm);
1470 * WPA/802.11i assocation request processing.
1473 wpa_assocreq(struct ieee80211_node *ni, struct ieee80211_rsnparms *rsnparms,
1474 const struct ieee80211_frame *wh, const uint8_t *wpa,
1475 const uint8_t *rsn, uint16_t capinfo)
1477 struct ieee80211vap *vap = ni->ni_vap;
1481 ni->ni_flags &= ~(IEEE80211_NODE_WPS|IEEE80211_NODE_TSN);
1482 if (wpa == NULL && rsn == NULL) {
1483 if (vap->iv_flags_ext & IEEE80211_FEXT_WPS) {
1485 * W-Fi Protected Setup (WPS) permits
1486 * clients to associate and pass EAPOL frames
1487 * to establish initial credentials.
1489 ni->ni_flags |= IEEE80211_NODE_WPS;
1492 if ((vap->iv_flags_ext & IEEE80211_FEXT_TSN) &&
1493 (capinfo & IEEE80211_CAPINFO_PRIVACY)) {
1495 * Transitional Security Network. Permits clients
1496 * to associate and use WEP while WPA is configured.
1498 ni->ni_flags |= IEEE80211_NODE_TSN;
1501 IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA,
1502 wh, NULL, "%s", "no WPA/RSN IE in association request");
1503 vap->iv_stats.is_rx_assoc_badwpaie++;
1504 reason = IEEE80211_REASON_IE_INVALID;
1507 /* assert right association security credentials */
1508 badwparsn = 0; /* NB: to silence compiler */
1509 switch (vap->iv_flags & IEEE80211_F_WPA) {
1510 case IEEE80211_F_WPA1:
1511 badwparsn = (wpa == NULL);
1513 case IEEE80211_F_WPA2:
1514 badwparsn = (rsn == NULL);
1516 case IEEE80211_F_WPA1|IEEE80211_F_WPA2:
1517 badwparsn = (wpa == NULL && rsn == NULL);
1521 IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA,
1523 "%s", "missing WPA/RSN IE in association request");
1524 vap->iv_stats.is_rx_assoc_badwpaie++;
1525 reason = IEEE80211_REASON_IE_INVALID;
1529 * Parse WPA/RSN information element.
1532 reason = ieee80211_parse_wpa(vap, wpa, rsnparms, wh);
1534 reason = ieee80211_parse_rsn(vap, rsn, rsnparms, wh);
1536 /* XXX distinguish WPA/RSN? */
1537 vap->iv_stats.is_rx_assoc_badwpaie++;
1540 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, ni,
1541 "%s ie: mc %u/%u uc %u/%u key %u caps 0x%x",
1542 wpa != NULL ? "WPA" : "RSN",
1543 rsnparms->rsn_mcastcipher, rsnparms->rsn_mcastkeylen,
1544 rsnparms->rsn_ucastcipher, rsnparms->rsn_ucastkeylen,
1545 rsnparms->rsn_keymgmt, rsnparms->rsn_caps);
1549 ieee80211_node_deauth(ni, reason);
1553 /* XXX find a better place for definition */
1554 struct l2_update_frame {
1555 struct ether_header eh;
1563 * Deliver a TGf L2UF frame on behalf of a station.
1564 * This primes any bridge when the station is roaming
1565 * between ap's on the same wired network.
1568 ieee80211_deliver_l2uf(struct ieee80211_node *ni)
1570 struct ieee80211vap *vap = ni->ni_vap;
1571 struct ifnet *ifp = vap->iv_ifp;
1573 struct l2_update_frame *l2uf;
1574 struct ether_header *eh;
1576 m = m_gethdr(M_NOWAIT, MT_DATA);
1578 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
1579 "%s", "no mbuf for l2uf frame");
1580 vap->iv_stats.is_rx_nobuf++; /* XXX not right */
1583 l2uf = mtod(m, struct l2_update_frame *);
1585 /* dst: Broadcast address */
1586 IEEE80211_ADDR_COPY(eh->ether_dhost, ifp->if_broadcastaddr);
1587 /* src: associated STA */
1588 IEEE80211_ADDR_COPY(eh->ether_shost, ni->ni_macaddr);
1589 eh->ether_type = htons(sizeof(*l2uf) - sizeof(*eh));
1593 l2uf->control = 0xf5;
1594 l2uf->xid[0] = 0x81;
1595 l2uf->xid[1] = 0x80;
1596 l2uf->xid[2] = 0x00;
1598 m->m_pkthdr.len = m->m_len = sizeof(*l2uf);
1599 hostap_deliver_data(vap, ni, m);
1603 ratesetmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1604 int reassoc, int resp, const char *tag, int rate)
1606 IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2,
1607 "deny %s request, %s rate set mismatch, rate/MCS %d",
1608 reassoc ? "reassoc" : "assoc", tag, rate & IEEE80211_RATE_VAL);
1609 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_BASIC_RATE);
1610 ieee80211_node_leave(ni);
1614 capinfomismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1615 int reassoc, int resp, const char *tag, int capinfo)
1617 struct ieee80211vap *vap = ni->ni_vap;
1619 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2,
1620 "deny %s request, %s mismatch 0x%x",
1621 reassoc ? "reassoc" : "assoc", tag, capinfo);
1622 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_CAPINFO);
1623 ieee80211_node_leave(ni);
1624 vap->iv_stats.is_rx_assoc_capmismatch++;
1628 htcapmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1629 int reassoc, int resp)
1631 IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2,
1632 "deny %s request, %s missing HT ie", reassoc ? "reassoc" : "assoc");
1633 /* XXX no better code */
1634 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_MISSING_HT_CAPS);
1635 ieee80211_node_leave(ni);
1639 authalgreject(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1640 int algo, int seq, int status)
1642 struct ieee80211vap *vap = ni->ni_vap;
1644 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1645 wh, NULL, "unsupported alg %d", algo);
1646 vap->iv_stats.is_rx_auth_unsupported++;
1647 ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_AUTH,
1648 seq | (status << 16));
1652 ishtmixed(const uint8_t *ie)
1654 const struct ieee80211_ie_htinfo *ht =
1655 (const struct ieee80211_ie_htinfo *) ie;
1656 return (ht->hi_byte2 & IEEE80211_HTINFO_OPMODE) ==
1657 IEEE80211_HTINFO_OPMODE_MIXED;
1661 is11bclient(const uint8_t *rates, const uint8_t *xrates)
1663 static const uint32_t brates = (1<<2*1)|(1<<2*2)|(1<<11)|(1<<2*11);
1666 /* NB: the 11b clients we care about will not have xrates */
1667 if (xrates != NULL || rates == NULL)
1669 for (i = 0; i < rates[1]; i++) {
1670 int r = rates[2+i] & IEEE80211_RATE_VAL;
1671 if (r > 2*11 || ((1<<r) & brates) == 0)
1678 hostap_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0,
1679 int subtype, int rssi, int nf)
1681 struct ieee80211vap *vap = ni->ni_vap;
1682 struct ieee80211com *ic = ni->ni_ic;
1683 struct ieee80211_frame *wh;
1684 uint8_t *frm, *efrm, *sfrm;
1685 uint8_t *ssid, *rates, *xrates, *wpa, *rsn, *wme, *ath, *htcap;
1689 wh = mtod(m0, struct ieee80211_frame *);
1690 frm = (uint8_t *)&wh[1];
1691 efrm = mtod(m0, uint8_t *) + m0->m_len;
1693 case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1694 case IEEE80211_FC0_SUBTYPE_BEACON: {
1695 struct ieee80211_scanparams scan;
1697 * We process beacon/probe response frames when scanning;
1698 * otherwise we check beacon frames for overlapping non-ERP
1699 * BSS in 11g and/or overlapping legacy BSS when in HT.
1701 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0 &&
1702 subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) {
1703 vap->iv_stats.is_rx_mgtdiscard++;
1706 /* NB: accept off-channel frames */
1707 if (ieee80211_parse_beacon(ni, m0, &scan) &~ IEEE80211_BPARSE_OFFCHAN)
1710 * Count frame now that we know it's to be processed.
1712 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1713 vap->iv_stats.is_rx_beacon++; /* XXX remove */
1714 IEEE80211_NODE_STAT(ni, rx_beacons);
1716 IEEE80211_NODE_STAT(ni, rx_proberesp);
1718 * If scanning, just pass information to the scan module.
1720 if (ic->ic_flags & IEEE80211_F_SCAN) {
1721 if (scan.status == 0 && /* NB: on channel */
1722 (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN)) {
1724 * Actively scanning a channel marked passive;
1725 * send a probe request now that we know there
1726 * is 802.11 traffic present.
1728 * XXX check if the beacon we recv'd gives
1729 * us what we need and suppress the probe req
1731 ieee80211_probe_curchan(vap, 1);
1732 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1734 ieee80211_add_scan(vap, &scan, wh, subtype, rssi, nf);
1738 * Check beacon for overlapping bss w/ non ERP stations.
1739 * If we detect one and protection is configured but not
1740 * enabled, enable it and start a timer that'll bring us
1741 * out if we stop seeing the bss.
1743 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
1744 scan.status == 0 && /* NB: on-channel */
1745 ((scan.erp & 0x100) == 0 || /* NB: no ERP, 11b sta*/
1746 (scan.erp & IEEE80211_ERP_NON_ERP_PRESENT))) {
1747 ic->ic_lastnonerp = ticks;
1748 ic->ic_flags_ext |= IEEE80211_FEXT_NONERP_PR;
1749 if (ic->ic_protmode != IEEE80211_PROT_NONE &&
1750 (ic->ic_flags & IEEE80211_F_USEPROT) == 0) {
1751 IEEE80211_NOTE_FRAME(vap,
1752 IEEE80211_MSG_ASSOC, wh,
1753 "non-ERP present on channel %d "
1754 "(saw erp 0x%x from channel %d), "
1755 "enable use of protection",
1756 ic->ic_curchan->ic_ieee,
1757 scan.erp, scan.chan);
1758 ic->ic_flags |= IEEE80211_F_USEPROT;
1759 ieee80211_notify_erp(ic);
1763 * Check beacon for non-HT station on HT channel
1764 * and update HT BSS occupancy as appropriate.
1766 if (IEEE80211_IS_CHAN_HT(ic->ic_curchan)) {
1767 if (scan.status & IEEE80211_BPARSE_OFFCHAN) {
1769 * Off control channel; only check frames
1770 * that come in the extension channel when
1771 * operating w/ HT40.
1773 if (!IEEE80211_IS_CHAN_HT40(ic->ic_curchan))
1775 if (scan.chan != ic->ic_curchan->ic_extieee)
1778 if (scan.htinfo == NULL) {
1779 ieee80211_htprot_update(ic,
1780 IEEE80211_HTINFO_OPMODE_PROTOPT |
1781 IEEE80211_HTINFO_NONHT_PRESENT);
1782 } else if (ishtmixed(scan.htinfo)) {
1783 /* XXX? take NONHT_PRESENT from beacon? */
1784 ieee80211_htprot_update(ic,
1785 IEEE80211_HTINFO_OPMODE_MIXED |
1786 IEEE80211_HTINFO_NONHT_PRESENT);
1792 case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1793 if (vap->iv_state != IEEE80211_S_RUN) {
1794 vap->iv_stats.is_rx_mgtdiscard++;
1798 * prreq frame format
1800 * [tlv] supported rates
1801 * [tlv] extended supported rates
1803 ssid = rates = xrates = NULL;
1805 while (efrm - frm > 1) {
1806 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1808 case IEEE80211_ELEMID_SSID:
1811 case IEEE80211_ELEMID_RATES:
1814 case IEEE80211_ELEMID_XRATES:
1820 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
1822 IEEE80211_VERIFY_ELEMENT(xrates,
1823 IEEE80211_RATE_MAXSIZE - rates[1], return);
1824 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
1825 IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return);
1826 if ((vap->iv_flags & IEEE80211_F_HIDESSID) && ssid[1] == 0) {
1827 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1829 "%s", "no ssid with ssid suppression enabled");
1830 vap->iv_stats.is_rx_ssidmismatch++; /*XXX*/
1834 /* XXX find a better class or define it's own */
1835 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
1836 "%s", "recv probe req");
1838 * Some legacy 11b clients cannot hack a complete
1839 * probe response frame. When the request includes
1840 * only a bare-bones rate set, communicate this to
1841 * the transmit side.
1843 ieee80211_send_proberesp(vap, wh->i_addr2,
1844 is11bclient(rates, xrates) ? IEEE80211_SEND_LEGACY_11B : 0);
1847 case IEEE80211_FC0_SUBTYPE_AUTH: {
1848 uint16_t algo, seq, status;
1850 if (vap->iv_state != IEEE80211_S_RUN) {
1851 vap->iv_stats.is_rx_mgtdiscard++;
1854 if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) {
1855 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1856 wh, NULL, "%s", "wrong bssid");
1857 vap->iv_stats.is_rx_wrongbss++; /*XXX unique stat?*/
1867 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return);
1868 algo = le16toh(*(uint16_t *)frm);
1869 seq = le16toh(*(uint16_t *)(frm + 2));
1870 status = le16toh(*(uint16_t *)(frm + 4));
1871 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2,
1872 "recv auth frame with algorithm %d seq %d", algo, seq);
1874 * Consult the ACL policy module if setup.
1876 if (vap->iv_acl != NULL &&
1877 !vap->iv_acl->iac_check(vap, wh->i_addr2)) {
1878 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1879 wh, NULL, "%s", "disallowed by ACL");
1880 vap->iv_stats.is_rx_acl++;
1881 ieee80211_send_error(ni, wh->i_addr2,
1882 IEEE80211_FC0_SUBTYPE_AUTH,
1883 (seq+1) | (IEEE80211_STATUS_UNSPECIFIED<<16));
1886 if (vap->iv_flags & IEEE80211_F_COUNTERM) {
1887 IEEE80211_DISCARD(vap,
1888 IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO,
1889 wh, NULL, "%s", "TKIP countermeasures enabled");
1890 vap->iv_stats.is_rx_auth_countermeasures++;
1891 ieee80211_send_error(ni, wh->i_addr2,
1892 IEEE80211_FC0_SUBTYPE_AUTH,
1893 IEEE80211_REASON_MIC_FAILURE);
1896 if (algo == IEEE80211_AUTH_ALG_SHARED)
1897 hostap_auth_shared(ni, wh, frm + 6, efrm, rssi, nf,
1899 else if (algo == IEEE80211_AUTH_ALG_OPEN)
1900 hostap_auth_open(ni, wh, rssi, nf, seq, status);
1901 else if (algo == IEEE80211_AUTH_ALG_LEAP) {
1902 authalgreject(ni, wh, algo,
1903 seq+1, IEEE80211_STATUS_ALG);
1907 * We assume that an unknown algorithm is the result
1908 * of a decryption failure on a shared key auth frame;
1909 * return a status code appropriate for that instead
1910 * of IEEE80211_STATUS_ALG.
1912 * NB: a seq# of 4 is intentional; the decrypted
1913 * frame likely has a bogus seq value.
1915 authalgreject(ni, wh, algo,
1916 4, IEEE80211_STATUS_CHALLENGE);
1922 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
1923 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: {
1924 uint16_t capinfo, lintval;
1925 struct ieee80211_rsnparms rsnparms;
1927 if (vap->iv_state != IEEE80211_S_RUN) {
1928 vap->iv_stats.is_rx_mgtdiscard++;
1931 if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) {
1932 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1933 wh, NULL, "%s", "wrong bssid");
1934 vap->iv_stats.is_rx_assoc_bss++;
1937 if (subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) {
1939 resp = IEEE80211_FC0_SUBTYPE_REASSOC_RESP;
1942 resp = IEEE80211_FC0_SUBTYPE_ASSOC_RESP;
1944 if (ni == vap->iv_bss) {
1945 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2,
1946 "deny %s request, sta not authenticated",
1947 reassoc ? "reassoc" : "assoc");
1948 ieee80211_send_error(ni, wh->i_addr2,
1949 IEEE80211_FC0_SUBTYPE_DEAUTH,
1950 IEEE80211_REASON_ASSOC_NOT_AUTHED);
1951 vap->iv_stats.is_rx_assoc_notauth++;
1956 * asreq frame format
1957 * [2] capability information
1958 * [2] listen interval
1959 * [6*] current AP address (reassoc only)
1961 * [tlv] supported rates
1962 * [tlv] extended supported rates
1964 * [tlv] HT capabilities
1965 * [tlv] Atheros capabilities
1967 IEEE80211_VERIFY_LENGTH(efrm - frm, (reassoc ? 10 : 4), return);
1968 capinfo = le16toh(*(uint16_t *)frm); frm += 2;
1969 lintval = le16toh(*(uint16_t *)frm); frm += 2;
1971 frm += 6; /* ignore current AP info */
1972 ssid = rates = xrates = wpa = rsn = wme = ath = htcap = NULL;
1974 while (efrm - frm > 1) {
1975 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1977 case IEEE80211_ELEMID_SSID:
1980 case IEEE80211_ELEMID_RATES:
1983 case IEEE80211_ELEMID_XRATES:
1986 case IEEE80211_ELEMID_RSN:
1989 case IEEE80211_ELEMID_HTCAP:
1992 case IEEE80211_ELEMID_VENDOR:
1995 else if (iswmeinfo(frm))
1997 #ifdef IEEE80211_SUPPORT_SUPERG
1998 else if (isatherosoui(frm))
2001 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) {
2002 if (ishtcapoui(frm) && htcap == NULL)
2009 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
2011 IEEE80211_VERIFY_ELEMENT(xrates,
2012 IEEE80211_RATE_MAXSIZE - rates[1], return);
2013 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
2014 IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return);
2015 if (htcap != NULL) {
2016 IEEE80211_VERIFY_LENGTH(htcap[1],
2017 htcap[0] == IEEE80211_ELEMID_VENDOR ?
2018 4 + sizeof(struct ieee80211_ie_htcap)-2 :
2019 sizeof(struct ieee80211_ie_htcap)-2,
2020 return); /* XXX just NULL out? */
2023 if ((vap->iv_flags & IEEE80211_F_WPA) &&
2024 !wpa_assocreq(ni, &rsnparms, wh, wpa, rsn, capinfo))
2026 /* discard challenge after association */
2027 if (ni->ni_challenge != NULL) {
2028 free(ni->ni_challenge, M_80211_NODE);
2029 ni->ni_challenge = NULL;
2031 /* NB: 802.11 spec says to ignore station's privacy bit */
2032 if ((capinfo & IEEE80211_CAPINFO_ESS) == 0) {
2033 capinfomismatch(ni, wh, reassoc, resp,
2034 "capability", capinfo);
2038 * Disallow re-associate w/ invalid slot time setting.
2040 if (ni->ni_associd != 0 &&
2041 IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2042 ((ni->ni_capinfo ^ capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME)) {
2043 capinfomismatch(ni, wh, reassoc, resp,
2044 "slot time", capinfo);
2047 rate = ieee80211_setup_rates(ni, rates, xrates,
2048 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
2049 IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
2050 if (rate & IEEE80211_RATE_BASIC) {
2051 ratesetmismatch(ni, wh, reassoc, resp, "legacy", rate);
2052 vap->iv_stats.is_rx_assoc_norate++;
2056 * If constrained to 11g-only stations reject an
2057 * 11b-only station. We cheat a bit here by looking
2058 * at the max negotiated xmit rate and assuming anyone
2059 * with a best rate <24Mb/s is an 11b station.
2061 if ((vap->iv_flags & IEEE80211_F_PUREG) && rate < 48) {
2062 ratesetmismatch(ni, wh, reassoc, resp, "11g", rate);
2063 vap->iv_stats.is_rx_assoc_norate++;
2067 * Do HT rate set handling and setup HT node state.
2069 ni->ni_chan = vap->iv_bss->ni_chan;
2070 if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && htcap != NULL) {
2071 rate = ieee80211_setup_htrates(ni, htcap,
2072 IEEE80211_F_DOFMCS | IEEE80211_F_DONEGO |
2074 if (rate & IEEE80211_RATE_BASIC) {
2075 ratesetmismatch(ni, wh, reassoc, resp,
2077 vap->iv_stats.is_ht_assoc_norate++;
2080 ieee80211_ht_node_init(ni);
2081 ieee80211_ht_updatehtcap(ni, htcap);
2082 } else if (ni->ni_flags & IEEE80211_NODE_HT)
2083 ieee80211_ht_node_cleanup(ni);
2084 #ifdef IEEE80211_SUPPORT_SUPERG
2085 else if (ni->ni_ath_flags & IEEE80211_NODE_ATH)
2086 ieee80211_ff_node_cleanup(ni);
2089 * Allow AMPDU operation only with unencrypted traffic
2090 * or AES-CCM; the 11n spec only specifies these ciphers
2091 * so permitting any others is undefined and can lead
2092 * to interoperability problems.
2094 if ((ni->ni_flags & IEEE80211_NODE_HT) &&
2095 (((vap->iv_flags & IEEE80211_F_WPA) &&
2096 rsnparms.rsn_ucastcipher != IEEE80211_CIPHER_AES_CCM) ||
2097 (vap->iv_flags & (IEEE80211_F_WPA|IEEE80211_F_PRIVACY)) == IEEE80211_F_PRIVACY)) {
2099 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni,
2100 "disallow HT use because WEP or TKIP requested, "
2101 "capinfo 0x%x ucastcipher %d", capinfo,
2102 rsnparms.rsn_ucastcipher);
2103 ieee80211_ht_node_cleanup(ni);
2104 vap->iv_stats.is_ht_assoc_downgrade++;
2107 * If constrained to 11n-only stations reject legacy stations.
2109 if ((vap->iv_flags_ht & IEEE80211_FHT_PUREN) &&
2110 (ni->ni_flags & IEEE80211_NODE_HT) == 0) {
2111 htcapmismatch(ni, wh, reassoc, resp);
2112 vap->iv_stats.is_ht_assoc_nohtcap++;
2115 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
2117 ni->ni_intval = lintval;
2118 ni->ni_capinfo = capinfo;
2119 ni->ni_fhdwell = vap->iv_bss->ni_fhdwell;
2120 ni->ni_fhindex = vap->iv_bss->ni_fhindex;
2123 * XXX maybe better to just expand
2125 if (ieee80211_ies_init(&ni->ni_ies, sfrm, efrm - sfrm)) {
2126 #define setie(_ie, _off) ieee80211_ies_setie(ni->ni_ies, _ie, _off)
2128 setie(wpa_ie, wpa - sfrm);
2130 setie(rsn_ie, rsn - sfrm);
2132 setie(htcap_ie, htcap - sfrm);
2134 setie(wme_ie, wme - sfrm);
2136 * Mark node as capable of QoS.
2138 ni->ni_flags |= IEEE80211_NODE_QOS;
2140 ni->ni_flags &= ~IEEE80211_NODE_QOS;
2141 #ifdef IEEE80211_SUPPORT_SUPERG
2143 setie(ath_ie, ath - sfrm);
2145 * Parse ATH station parameters.
2147 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
2150 ni->ni_ath_flags = 0;
2153 ni->ni_flags &= ~IEEE80211_NODE_QOS;
2154 ni->ni_ath_flags = 0;
2156 ieee80211_node_join(ni, resp);
2157 ieee80211_deliver_l2uf(ni);
2161 case IEEE80211_FC0_SUBTYPE_DEAUTH:
2162 case IEEE80211_FC0_SUBTYPE_DISASSOC: {
2165 if (vap->iv_state != IEEE80211_S_RUN ||
2166 /* NB: can happen when in promiscuous mode */
2167 !IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) {
2168 vap->iv_stats.is_rx_mgtdiscard++;
2172 * deauth/disassoc frame format
2175 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return);
2176 reason = le16toh(*(uint16_t *)frm);
2177 if (subtype == IEEE80211_FC0_SUBTYPE_DEAUTH) {
2178 vap->iv_stats.is_rx_deauth++;
2179 IEEE80211_NODE_STAT(ni, rx_deauth);
2181 vap->iv_stats.is_rx_disassoc++;
2182 IEEE80211_NODE_STAT(ni, rx_disassoc);
2184 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni,
2185 "recv %s (reason %d)", ieee80211_mgt_subtype_name[subtype >>
2186 IEEE80211_FC0_SUBTYPE_SHIFT], reason);
2187 if (ni != vap->iv_bss)
2188 ieee80211_node_leave(ni);
2192 case IEEE80211_FC0_SUBTYPE_ACTION:
2193 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
2194 if (ni == vap->iv_bss) {
2195 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2196 wh, NULL, "%s", "unknown node");
2197 vap->iv_stats.is_rx_mgtdiscard++;
2198 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
2199 !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2200 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2201 wh, NULL, "%s", "not for us");
2202 vap->iv_stats.is_rx_mgtdiscard++;
2203 } else if (vap->iv_state != IEEE80211_S_RUN) {
2204 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2205 wh, NULL, "wrong state %s",
2206 ieee80211_state_name[vap->iv_state]);
2207 vap->iv_stats.is_rx_mgtdiscard++;
2209 if (ieee80211_parse_action(ni, m0) == 0)
2210 (void)ic->ic_recv_action(ni, wh, frm, efrm);
2214 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2215 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2216 case IEEE80211_FC0_SUBTYPE_ATIM:
2217 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2218 wh, NULL, "%s", "not handled");
2219 vap->iv_stats.is_rx_mgtdiscard++;
2223 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2224 wh, "mgt", "subtype 0x%x not handled", subtype);
2225 vap->iv_stats.is_rx_badsubtype++;
2231 hostap_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
2234 case IEEE80211_FC0_SUBTYPE_PS_POLL:
2235 hostap_recv_pspoll(ni, m);
2237 case IEEE80211_FC0_SUBTYPE_BAR:
2238 ieee80211_recv_bar(ni, m);
2244 * Process a received ps-poll frame.
2247 hostap_recv_pspoll(struct ieee80211_node *ni, struct mbuf *m0)
2249 struct ieee80211vap *vap = ni->ni_vap;
2250 struct ieee80211_frame_min *wh;
2256 wh = mtod(m0, struct ieee80211_frame_min *);
2257 if (ni->ni_associd == 0) {
2258 IEEE80211_DISCARD(vap,
2259 IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG,
2260 (struct ieee80211_frame *) wh, NULL,
2261 "%s", "unassociated station");
2262 vap->iv_stats.is_ps_unassoc++;
2263 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH,
2264 IEEE80211_REASON_NOT_ASSOCED);
2268 aid = le16toh(*(uint16_t *)wh->i_dur);
2269 if (aid != ni->ni_associd) {
2270 IEEE80211_DISCARD(vap,
2271 IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG,
2272 (struct ieee80211_frame *) wh, NULL,
2273 "aid mismatch: sta aid 0x%x poll aid 0x%x",
2274 ni->ni_associd, aid);
2275 vap->iv_stats.is_ps_badaid++;
2277 * NB: We used to deauth the station but it turns out
2278 * the Blackberry Curve 8230 (and perhaps other devices)
2279 * sometimes send the wrong AID when WME is negotiated.
2280 * Being more lenient here seems ok as we already check
2281 * the station is associated and we only return frames
2282 * queued for the station (i.e. we don't use the AID).
2287 /* Okay, take the first queued packet and put it out... */
2288 m = ieee80211_node_psq_dequeue(ni, &qlen);
2290 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_POWER, wh->i_addr2,
2291 "%s", "recv ps-poll, but queue empty");
2292 ieee80211_send_nulldata(ieee80211_ref_node(ni));
2293 vap->iv_stats.is_ps_qempty++; /* XXX node stat */
2294 if (vap->iv_set_tim != NULL)
2295 vap->iv_set_tim(ni, 0); /* just in case */
2299 * If there are more packets, set the more packets bit
2300 * in the packet dispatched to the station; otherwise
2301 * turn off the TIM bit.
2304 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
2305 "recv ps-poll, send packet, %u still queued", qlen);
2306 m->m_flags |= M_MORE_DATA;
2308 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
2309 "%s", "recv ps-poll, send packet, queue empty");
2310 if (vap->iv_set_tim != NULL)
2311 vap->iv_set_tim(ni, 0);
2313 m->m_flags |= M_PWR_SAV; /* bypass PS handling */
2315 if (m->m_flags & M_ENCAP)
2316 ifp = vap->iv_ic->ic_ifp;
2319 IF_ENQUEUE(&ifp->if_snd, m);