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 HOSTAP 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_var.h>
54 #include <net/if_media.h>
55 #include <net/if_llc.h>
56 #include <net/ethernet.h>
60 #include <net80211/ieee80211_var.h>
61 #include <net80211/ieee80211_hostap.h>
62 #include <net80211/ieee80211_input.h>
63 #ifdef IEEE80211_SUPPORT_SUPERG
64 #include <net80211/ieee80211_superg.h>
66 #include <net80211/ieee80211_wds.h>
67 #include <net80211/ieee80211_vht.h>
68 #include <net80211/ieee80211_sta.h> /* for parse_wmeie */
70 #define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2)
72 static void hostap_vattach(struct ieee80211vap *);
73 static int hostap_newstate(struct ieee80211vap *, enum ieee80211_state, int);
74 static int hostap_input(struct ieee80211_node *ni, struct mbuf *m,
75 const struct ieee80211_rx_stats *,
77 static void hostap_deliver_data(struct ieee80211vap *,
78 struct ieee80211_node *, struct mbuf *);
79 static void hostap_recv_mgmt(struct ieee80211_node *, struct mbuf *,
80 int subtype, const struct ieee80211_rx_stats *rxs, int rssi, int nf);
81 static void hostap_recv_ctl(struct ieee80211_node *, struct mbuf *, int);
84 ieee80211_hostap_attach(struct ieee80211com *ic)
86 ic->ic_vattach[IEEE80211_M_HOSTAP] = hostap_vattach;
90 ieee80211_hostap_detach(struct ieee80211com *ic)
95 hostap_vdetach(struct ieee80211vap *vap)
100 hostap_vattach(struct ieee80211vap *vap)
102 vap->iv_newstate = hostap_newstate;
103 vap->iv_input = hostap_input;
104 vap->iv_recv_mgmt = hostap_recv_mgmt;
105 vap->iv_recv_ctl = hostap_recv_ctl;
106 vap->iv_opdetach = hostap_vdetach;
107 vap->iv_deliver_data = hostap_deliver_data;
108 vap->iv_recv_pspoll = ieee80211_recv_pspoll;
112 sta_disassoc(void *arg, struct ieee80211_node *ni)
115 if (ni->ni_associd != 0) {
116 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DISASSOC,
117 IEEE80211_REASON_ASSOC_LEAVE);
118 ieee80211_node_leave(ni);
123 sta_csa(void *arg, struct ieee80211_node *ni)
125 struct ieee80211vap *vap = ni->ni_vap;
127 if (ni->ni_associd != 0)
128 if (ni->ni_inact > vap->iv_inact_init) {
129 ni->ni_inact = vap->iv_inact_init;
130 IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
131 "%s: inact %u", __func__, ni->ni_inact);
136 sta_drop(void *arg, struct ieee80211_node *ni)
139 if (ni->ni_associd != 0)
140 ieee80211_node_leave(ni);
144 * Does a channel change require associated stations to re-associate
145 * so protocol state is correct. This is used when doing CSA across
146 * bands or similar (e.g. HT -> legacy).
149 isbandchange(struct ieee80211com *ic)
151 return ((ic->ic_bsschan->ic_flags ^ ic->ic_csa_newchan->ic_flags) &
152 (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_HALF |
153 IEEE80211_CHAN_QUARTER | IEEE80211_CHAN_HT)) != 0;
157 * IEEE80211_M_HOSTAP vap state machine handler.
160 hostap_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
162 struct ieee80211com *ic = vap->iv_ic;
163 enum ieee80211_state ostate;
165 IEEE80211_LOCK_ASSERT(ic);
167 ostate = vap->iv_state;
168 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
169 __func__, ieee80211_state_name[ostate],
170 ieee80211_state_name[nstate], arg);
171 vap->iv_state = nstate; /* state transition */
172 if (ostate != IEEE80211_S_SCAN)
173 ieee80211_cancel_scan(vap); /* background scan */
175 case IEEE80211_S_INIT:
177 case IEEE80211_S_SCAN:
178 ieee80211_cancel_scan(vap);
180 case IEEE80211_S_CAC:
181 ieee80211_dfs_cac_stop(vap);
183 case IEEE80211_S_RUN:
184 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap,
190 if (ostate != IEEE80211_S_INIT) {
191 /* NB: optimize INIT -> INIT case */
192 ieee80211_reset_bss(vap);
194 if (vap->iv_auth->ia_detach != NULL)
195 vap->iv_auth->ia_detach(vap);
197 case IEEE80211_S_SCAN:
199 case IEEE80211_S_CSA:
200 case IEEE80211_S_RUN:
201 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap,
204 * Clear overlapping BSS state; the beacon frame
205 * will be reconstructed on transition to the RUN
206 * state and the timeout routines check if the flag
207 * is set before doing anything so this is sufficient.
209 vap->iv_flags_ext &= ~IEEE80211_FEXT_NONERP_PR;
210 vap->iv_flags_ht &= ~IEEE80211_FHT_NONHT_PR;
211 /* XXX TODO: schedule deferred update? */
213 case IEEE80211_S_CAC:
215 * NB: We may get here because of a manual channel
216 * change in which case we need to stop CAC
217 * XXX no need to stop if ostate RUN but it's ok
219 ieee80211_dfs_cac_stop(vap);
221 case IEEE80211_S_INIT:
222 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
223 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan)) {
225 * Already have a channel; bypass the
226 * scan and startup immediately.
227 * ieee80211_create_ibss will call back to
228 * move us to RUN state.
230 ieee80211_create_ibss(vap, vap->iv_des_chan);
234 * Initiate a scan. We can come here as a result
235 * of an IEEE80211_IOC_SCAN_REQ too in which case
236 * the vap will be marked with IEEE80211_FEXT_SCANREQ
237 * and the scan request parameters will be present
238 * in iv_scanreq. Otherwise we do the default.
240 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
241 ieee80211_check_scan(vap,
242 vap->iv_scanreq_flags,
243 vap->iv_scanreq_duration,
244 vap->iv_scanreq_mindwell,
245 vap->iv_scanreq_maxdwell,
246 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
247 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
249 ieee80211_check_scan_current(vap);
251 case IEEE80211_S_SCAN:
253 * A state change requires a reset; scan.
255 ieee80211_check_scan_current(vap);
261 case IEEE80211_S_CAC:
263 * Start CAC on a DFS channel. We come here when starting
264 * a bss on a DFS channel (see ieee80211_create_ibss).
266 ieee80211_dfs_cac_start(vap);
268 case IEEE80211_S_RUN:
269 if (vap->iv_flags & IEEE80211_F_WPA) {
270 /* XXX validate prerequisites */
273 case IEEE80211_S_INIT:
275 * Already have a channel; bypass the
276 * scan and startup immediately.
277 * Note that ieee80211_create_ibss will call
278 * back to do a RUN->RUN state change.
280 ieee80211_create_ibss(vap,
281 ieee80211_ht_adjust_channel(ic,
282 ic->ic_curchan, vap->iv_flags_ht));
283 /* NB: iv_bss is changed on return */
285 case IEEE80211_S_CAC:
287 * NB: This is the normal state change when CAC
288 * expires and no radar was detected; no need to
289 * clear the CAC timer as it's already expired.
292 case IEEE80211_S_CSA:
294 * Shorten inactivity timer of associated stations
295 * to weed out sta's that don't follow a CSA.
297 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap,
300 * Update bss node channel to reflect where
301 * we landed after CSA.
303 ieee80211_node_set_chan(vap->iv_bss,
304 ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
305 ieee80211_htchanflags(vap->iv_bss->ni_chan)));
306 /* XXX bypass debug msgs */
308 case IEEE80211_S_SCAN:
309 case IEEE80211_S_RUN:
310 #ifdef IEEE80211_DEBUG
311 if (ieee80211_msg_debug(vap)) {
312 struct ieee80211_node *ni = vap->iv_bss;
314 "synchronized with %s ssid ",
315 ether_sprintf(ni->ni_bssid));
316 ieee80211_print_essid(ni->ni_essid,
319 printf(" channel %d start %uMb\n",
320 ieee80211_chan2ieee(ic, ic->ic_curchan),
321 IEEE80211_RATE2MBS(ni->ni_txrate));
329 * Start/stop the authenticator. We delay until here
330 * to allow configuration to happen out of order.
332 if (vap->iv_auth->ia_attach != NULL) {
333 /* XXX check failure */
334 vap->iv_auth->ia_attach(vap);
335 } else if (vap->iv_auth->ia_detach != NULL) {
336 vap->iv_auth->ia_detach(vap);
338 ieee80211_node_authorize(vap->iv_bss);
340 case IEEE80211_S_CSA:
341 if (ostate == IEEE80211_S_RUN && isbandchange(ic)) {
343 * On a ``band change'' silently drop associated
344 * stations as they must re-associate before they
345 * can pass traffic (as otherwise protocol state
346 * such as capabilities and the negotiated rate
347 * set may/will be wrong).
349 ieee80211_iterate_nodes_vap(&ic->ic_sta, vap,
360 hostap_deliver_data(struct ieee80211vap *vap,
361 struct ieee80211_node *ni, struct mbuf *m)
363 struct ether_header *eh = mtod(m, struct ether_header *);
364 struct ifnet *ifp = vap->iv_ifp;
366 /* clear driver/net80211 flags before passing up */
367 m->m_flags &= ~(M_MCAST | M_BCAST);
370 KASSERT(vap->iv_opmode == IEEE80211_M_HOSTAP,
371 ("gack, opmode %d", vap->iv_opmode));
375 if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
376 IEEE80211_NODE_STAT(ni, rx_data);
377 IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len);
378 if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
379 m->m_flags |= M_MCAST; /* XXX M_BCAST? */
380 IEEE80211_NODE_STAT(ni, rx_mcast);
382 IEEE80211_NODE_STAT(ni, rx_ucast);
384 /* perform as a bridge within the AP */
385 if ((vap->iv_flags & IEEE80211_F_NOBRIDGE) == 0) {
386 struct mbuf *mcopy = NULL;
388 if (m->m_flags & M_MCAST) {
389 mcopy = m_dup(m, M_NOWAIT);
391 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
393 mcopy->m_flags |= M_MCAST;
396 * Check if the destination is associated with the
397 * same vap and authorized to receive traffic.
398 * Beware of traffic destined for the vap itself;
399 * sending it will not work; just let it be delivered
402 struct ieee80211_node *sta = ieee80211_find_vap_node(
403 &vap->iv_ic->ic_sta, vap, eh->ether_dhost);
405 if (ieee80211_node_is_authorized(sta)) {
407 * Beware of sending to ourself; this
408 * needs to happen via the normal
411 if (sta != vap->iv_bss) {
416 vap->iv_stats.is_rx_unauth++;
417 IEEE80211_NODE_STAT(sta, rx_unauth);
419 ieee80211_free_node(sta);
423 (void) ieee80211_vap_xmitpkt(vap, mcopy);
427 * Mark frame as coming from vap's interface.
429 m->m_pkthdr.rcvif = ifp;
430 if (m->m_flags & M_MCAST) {
432 * Spam DWDS vap's w/ multicast traffic.
434 /* XXX only if dwds in use? */
435 ieee80211_dwds_mcast(vap, m);
437 if (ni->ni_vlan != 0) {
438 /* attach vlan tag */
439 m->m_pkthdr.ether_vtag = ni->ni_vlan;
440 m->m_flags |= M_VLANTAG;
442 ifp->if_input(ifp, m);
447 * Decide if a received management frame should be
448 * printed when debugging is enabled. This filters some
449 * of the less interesting frames that come frequently
453 doprint(struct ieee80211vap *vap, int subtype)
456 case IEEE80211_FC0_SUBTYPE_BEACON:
457 return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN);
458 case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
465 * Process a received frame. The node associated with the sender
466 * should be supplied. If nothing was found in the node table then
467 * the caller is assumed to supply a reference to iv_bss instead.
468 * The RSSI and a timestamp are also supplied. The RSSI data is used
469 * during AP scanning to select a AP to associate with; it can have
470 * any units so long as values have consistent units and higher values
471 * mean ``better signal''. The receive timestamp is currently not used
472 * by the 802.11 layer.
475 hostap_input(struct ieee80211_node *ni, struct mbuf *m,
476 const struct ieee80211_rx_stats *rxs, int rssi, int nf)
478 struct ieee80211vap *vap = ni->ni_vap;
479 struct ieee80211com *ic = ni->ni_ic;
480 struct ifnet *ifp = vap->iv_ifp;
481 struct ieee80211_frame *wh;
482 struct ieee80211_key *key;
483 struct ether_header *eh;
484 int hdrspace, need_tap = 1; /* mbuf need to be tapped. */
485 uint8_t dir, type, subtype, qos;
487 int is_hw_decrypted = 0;
488 int has_decrypted = 0;
491 * Some devices do hardware decryption all the way through
492 * to pretending the frame wasn't encrypted in the first place.
493 * So, tag it appropriately so it isn't discarded inappropriately.
495 if ((rxs != NULL) && (rxs->c_pktflags & IEEE80211_RX_F_DECRYPTED))
498 if (m->m_flags & M_AMPDU_MPDU) {
500 * Fastpath for A-MPDU reorder q resubmission. Frames
501 * w/ M_AMPDU_MPDU marked have already passed through
502 * here but were received out of order and been held on
503 * the reorder queue. When resubmitted they are marked
504 * with the M_AMPDU_MPDU flag and we can bypass most of
505 * the normal processing.
507 wh = mtod(m, struct ieee80211_frame *);
508 type = IEEE80211_FC0_TYPE_DATA;
509 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
510 subtype = IEEE80211_FC0_SUBTYPE_QOS;
511 hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */
515 KASSERT(ni != NULL, ("null node"));
516 ni->ni_inact = ni->ni_inact_reload;
518 type = -1; /* undefined */
520 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
521 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
522 ni->ni_macaddr, NULL,
523 "too short (1): len %u", m->m_pkthdr.len);
524 vap->iv_stats.is_rx_tooshort++;
528 * Bit of a cheat here, we use a pointer for a 3-address
529 * frame format but don't reference fields past outside
530 * ieee80211_frame_min w/o first validating the data is
533 wh = mtod(m, struct ieee80211_frame *);
535 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
536 IEEE80211_FC0_VERSION_0) {
537 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
538 ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x",
539 wh->i_fc[0], wh->i_fc[1]);
540 vap->iv_stats.is_rx_badversion++;
544 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
545 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
546 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
547 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
548 if (dir != IEEE80211_FC1_DIR_NODS)
550 else if (type == IEEE80211_FC0_TYPE_CTL)
553 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
554 IEEE80211_DISCARD_MAC(vap,
555 IEEE80211_MSG_ANY, ni->ni_macaddr,
556 NULL, "too short (2): len %u",
558 vap->iv_stats.is_rx_tooshort++;
564 * Validate the bssid.
566 if (!(type == IEEE80211_FC0_TYPE_MGT &&
567 subtype == IEEE80211_FC0_SUBTYPE_BEACON) &&
568 !IEEE80211_ADDR_EQ(bssid, vap->iv_bss->ni_bssid) &&
569 !IEEE80211_ADDR_EQ(bssid, ifp->if_broadcastaddr)) {
570 /* not interested in */
571 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
572 bssid, NULL, "%s", "not to bss");
573 vap->iv_stats.is_rx_wrongbss++;
577 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
579 if (IEEE80211_HAS_SEQ(type, subtype)) {
580 uint8_t tid = ieee80211_gettid(wh);
581 if (IEEE80211_QOS_HAS_SEQ(wh) &&
582 TID_TO_WME_AC(tid) >= WME_AC_VI)
583 ic->ic_wme.wme_hipri_traffic++;
584 if (! ieee80211_check_rxseq(ni, wh, bssid, rxs))
590 case IEEE80211_FC0_TYPE_DATA:
591 hdrspace = ieee80211_hdrspace(ic, wh);
592 if (m->m_len < hdrspace &&
593 (m = m_pullup(m, hdrspace)) == NULL) {
594 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
595 ni->ni_macaddr, NULL,
596 "data too short: expecting %u", hdrspace);
597 vap->iv_stats.is_rx_tooshort++;
600 if (!(dir == IEEE80211_FC1_DIR_TODS ||
601 (dir == IEEE80211_FC1_DIR_DSTODS &&
602 (vap->iv_flags & IEEE80211_F_DWDS)))) {
603 if (dir != IEEE80211_FC1_DIR_DSTODS) {
604 IEEE80211_DISCARD(vap,
605 IEEE80211_MSG_INPUT, wh, "data",
606 "incorrect dir 0x%x", dir);
608 IEEE80211_DISCARD(vap,
609 IEEE80211_MSG_INPUT |
610 IEEE80211_MSG_WDS, wh,
612 "%s", "DWDS not enabled");
614 vap->iv_stats.is_rx_wrongdir++;
617 /* check if source STA is associated */
618 if (ni == vap->iv_bss) {
619 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
620 wh, "data", "%s", "unknown src");
621 ieee80211_send_error(ni, wh->i_addr2,
622 IEEE80211_FC0_SUBTYPE_DEAUTH,
623 IEEE80211_REASON_NOT_AUTHED);
624 vap->iv_stats.is_rx_notassoc++;
627 if (ni->ni_associd == 0) {
628 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
629 wh, "data", "%s", "unassoc src");
630 IEEE80211_SEND_MGMT(ni,
631 IEEE80211_FC0_SUBTYPE_DISASSOC,
632 IEEE80211_REASON_NOT_ASSOCED);
633 vap->iv_stats.is_rx_notassoc++;
638 * Check for power save state change.
639 * XXX out-of-order A-MPDU frames?
641 if (((wh->i_fc[1] & IEEE80211_FC1_PWR_MGT) ^
642 (ni->ni_flags & IEEE80211_NODE_PWR_MGT)))
644 wh->i_fc[1] & IEEE80211_FC1_PWR_MGT);
646 * For 4-address packets handle WDS discovery
647 * notifications. Once a WDS link is setup frames
648 * are just delivered to the WDS vap (see below).
650 if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap == NULL) {
651 if (!ieee80211_node_is_authorized(ni)) {
652 IEEE80211_DISCARD(vap,
653 IEEE80211_MSG_INPUT |
654 IEEE80211_MSG_WDS, wh,
656 "%s", "unauthorized port");
657 vap->iv_stats.is_rx_unauth++;
658 IEEE80211_NODE_STAT(ni, rx_unauth);
661 ieee80211_dwds_discover(ni, m);
666 * Handle A-MPDU re-ordering. If the frame is to be
667 * processed directly then ieee80211_ampdu_reorder
668 * will return 0; otherwise it has consumed the mbuf
669 * and we should do nothing more with it.
671 if ((m->m_flags & M_AMPDU) &&
672 ieee80211_ampdu_reorder(ni, m, rxs) != 0) {
679 * Handle privacy requirements. Note that we
680 * must not be preempted from here until after
681 * we (potentially) call ieee80211_crypto_demic;
682 * otherwise we may violate assumptions in the
683 * crypto cipher modules used to do delayed update
684 * of replay sequence numbers.
686 if (is_hw_decrypted || wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
687 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
689 * Discard encrypted frames when privacy is off.
691 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
692 wh, "WEP", "%s", "PRIVACY off");
693 vap->iv_stats.is_rx_noprivacy++;
694 IEEE80211_NODE_STAT(ni, rx_noprivacy);
697 if (ieee80211_crypto_decap(ni, m, hdrspace, &key) == 0) {
698 /* NB: stats+msgs handled in crypto_decap */
699 IEEE80211_NODE_STAT(ni, rx_wepfail);
702 wh = mtod(m, struct ieee80211_frame *);
703 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED;
706 /* XXX M_WEP and IEEE80211_F_PRIVACY */
711 * Save QoS bits for use below--before we strip the header.
713 if (subtype == IEEE80211_FC0_SUBTYPE_QOS)
714 qos = ieee80211_getqos(wh)[0];
719 * Next up, any fragmentation.
721 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
722 m = ieee80211_defrag(ni, m, hdrspace);
724 /* Fragment dropped or frame not complete yet */
728 wh = NULL; /* no longer valid, catch any uses */
731 * Next strip any MSDU crypto bits.
733 if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) {
734 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
735 ni->ni_macaddr, "data", "%s", "demic error");
736 vap->iv_stats.is_rx_demicfail++;
737 IEEE80211_NODE_STAT(ni, rx_demicfail);
740 /* copy to listener after decrypt */
741 if (ieee80211_radiotap_active_vap(vap))
742 ieee80211_radiotap_rx(vap, m);
745 * Finally, strip the 802.11 header.
747 m = ieee80211_decap(vap, m, hdrspace);
749 /* XXX mask bit to check for both */
750 /* don't count Null data frames as errors */
751 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
752 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
754 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
755 ni->ni_macaddr, "data", "%s", "decap error");
756 vap->iv_stats.is_rx_decap++;
757 IEEE80211_NODE_STAT(ni, rx_decap);
760 eh = mtod(m, struct ether_header *);
761 if (!ieee80211_node_is_authorized(ni)) {
763 * Deny any non-PAE frames received prior to
764 * authorization. For open/shared-key
765 * authentication the port is mark authorized
766 * after authentication completes. For 802.1x
767 * the port is not marked authorized by the
768 * authenticator until the handshake has completed.
770 if (eh->ether_type != htons(ETHERTYPE_PAE)) {
771 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
772 eh->ether_shost, "data",
773 "unauthorized port: ether type 0x%x len %u",
774 eh->ether_type, m->m_pkthdr.len);
775 vap->iv_stats.is_rx_unauth++;
776 IEEE80211_NODE_STAT(ni, rx_unauth);
781 * When denying unencrypted frames, discard
782 * any non-PAE frames received without encryption.
784 if ((vap->iv_flags & IEEE80211_F_DROPUNENC) &&
785 ((has_decrypted == 0) && (m->m_flags & M_WEP) == 0) &&
786 (is_hw_decrypted == 0) &&
787 eh->ether_type != htons(ETHERTYPE_PAE)) {
789 * Drop unencrypted frames.
791 vap->iv_stats.is_rx_unencrypted++;
792 IEEE80211_NODE_STAT(ni, rx_unencrypted);
796 /* XXX require HT? */
797 if (qos & IEEE80211_QOS_AMSDU) {
798 m = ieee80211_decap_amsdu(ni, m);
800 return IEEE80211_FC0_TYPE_DATA;
802 #ifdef IEEE80211_SUPPORT_SUPERG
803 m = ieee80211_decap_fastframe(vap, ni, m);
805 return IEEE80211_FC0_TYPE_DATA;
808 if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap != NULL)
809 ieee80211_deliver_data(ni->ni_wdsvap, ni, m);
811 hostap_deliver_data(vap, ni, m);
812 return IEEE80211_FC0_TYPE_DATA;
814 case IEEE80211_FC0_TYPE_MGT:
815 vap->iv_stats.is_rx_mgmt++;
816 IEEE80211_NODE_STAT(ni, rx_mgmt);
817 if (dir != IEEE80211_FC1_DIR_NODS) {
818 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
819 wh, "mgt", "incorrect dir 0x%x", dir);
820 vap->iv_stats.is_rx_wrongdir++;
823 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
824 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
825 ni->ni_macaddr, "mgt", "too short: len %u",
827 vap->iv_stats.is_rx_tooshort++;
830 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
831 /* ensure return frames are unicast */
832 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
833 wh, NULL, "source is multicast: %s",
834 ether_sprintf(wh->i_addr2));
835 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */
838 #ifdef IEEE80211_DEBUG
839 if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) ||
840 ieee80211_msg_dumppkts(vap)) {
841 if_printf(ifp, "received %s from %s rssi %d\n",
842 ieee80211_mgt_subtype_name(subtype),
843 ether_sprintf(wh->i_addr2), rssi);
846 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
847 if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) {
849 * Only shared key auth frames with a challenge
850 * should be encrypted, discard all others.
852 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
854 "%s", "WEP set but not permitted");
855 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
858 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
860 * Discard encrypted frames when privacy is off.
862 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
863 wh, NULL, "%s", "WEP set but PRIVACY off");
864 vap->iv_stats.is_rx_noprivacy++;
867 hdrspace = ieee80211_hdrspace(ic, wh);
868 if (ieee80211_crypto_decap(ni, m, hdrspace, &key) == 0) {
869 /* NB: stats+msgs handled in crypto_decap */
872 wh = mtod(m, struct ieee80211_frame *);
873 wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED;
877 * Pass the packet to radiotap before calling iv_recv_mgmt().
878 * Otherwise iv_recv_mgmt() might pass another packet to
879 * radiotap, resulting in out of order packet captures.
881 if (ieee80211_radiotap_active_vap(vap))
882 ieee80211_radiotap_rx(vap, m);
884 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf);
887 case IEEE80211_FC0_TYPE_CTL:
888 vap->iv_stats.is_rx_ctl++;
889 IEEE80211_NODE_STAT(ni, rx_ctrl);
890 vap->iv_recv_ctl(ni, m, subtype);
893 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
894 wh, "bad", "frame type 0x%x", type);
895 /* should not come here */
899 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
902 if (need_tap && ieee80211_radiotap_active_vap(vap))
903 ieee80211_radiotap_rx(vap, m);
910 hostap_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh,
911 int rssi, int nf, uint16_t seq, uint16_t status)
913 struct ieee80211vap *vap = ni->ni_vap;
915 KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state));
917 if (ni->ni_authmode == IEEE80211_AUTH_SHARED) {
918 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
919 ni->ni_macaddr, "open auth",
920 "bad sta auth mode %u", ni->ni_authmode);
921 vap->iv_stats.is_rx_bad_auth++; /* XXX */
923 * Clear any challenge text that may be there if
924 * a previous shared key auth failed and then an
925 * open auth is attempted.
927 if (ni->ni_challenge != NULL) {
928 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE);
929 ni->ni_challenge = NULL;
931 /* XXX hack to workaround calling convention */
932 ieee80211_send_error(ni, wh->i_addr2,
933 IEEE80211_FC0_SUBTYPE_AUTH,
934 (seq + 1) | (IEEE80211_STATUS_ALG<<16));
937 if (seq != IEEE80211_AUTH_OPEN_REQUEST) {
938 vap->iv_stats.is_rx_bad_auth++;
941 /* always accept open authentication requests */
942 if (ni == vap->iv_bss) {
943 ni = ieee80211_dup_bss(vap, wh->i_addr2);
946 } else if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0)
947 (void) ieee80211_ref_node(ni);
949 * Mark the node as referenced to reflect that it's
950 * reference count has been bumped to insure it remains
951 * after the transaction completes.
953 ni->ni_flags |= IEEE80211_NODE_AREF;
955 * Mark the node as requiring a valid association id
956 * before outbound traffic is permitted.
958 ni->ni_flags |= IEEE80211_NODE_ASSOCID;
960 if (vap->iv_acl != NULL &&
961 vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) {
963 * When the ACL policy is set to RADIUS we defer the
964 * authorization to a user agent. Dispatch an event,
965 * a subsequent MLME call will decide the fate of the
966 * station. If the user agent is not present then the
967 * node will be reclaimed due to inactivity.
969 IEEE80211_NOTE_MAC(vap,
970 IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, ni->ni_macaddr,
971 "%s", "station authentication defered (radius acl)");
972 ieee80211_notify_node_auth(ni);
974 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1);
975 IEEE80211_NOTE_MAC(vap,
976 IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni->ni_macaddr,
977 "%s", "station authenticated (open)");
979 * When 802.1x is not in use mark the port
980 * authorized at this point so traffic can flow.
982 if (ni->ni_authmode != IEEE80211_AUTH_8021X)
983 ieee80211_node_authorize(ni);
988 hostap_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh,
989 uint8_t *frm, uint8_t *efrm, int rssi, int nf,
990 uint16_t seq, uint16_t status)
992 struct ieee80211vap *vap = ni->ni_vap;
994 int allocbs, estatus;
996 KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state));
999 * NB: this can happen as we allow pre-shared key
1000 * authentication to be enabled w/o wep being turned
1001 * on so that configuration of these can be done
1002 * in any order. It may be better to enforce the
1003 * ordering in which case this check would just be
1004 * for sanity/consistency.
1006 if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
1007 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1008 ni->ni_macaddr, "shared key auth",
1009 "%s", " PRIVACY is disabled");
1010 estatus = IEEE80211_STATUS_ALG;
1014 * Pre-shared key authentication is evil; accept
1015 * it only if explicitly configured (it is supported
1016 * mainly for compatibility with clients like Mac OS X).
1018 if (ni->ni_authmode != IEEE80211_AUTH_AUTO &&
1019 ni->ni_authmode != IEEE80211_AUTH_SHARED) {
1020 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1021 ni->ni_macaddr, "shared key auth",
1022 "bad sta auth mode %u", ni->ni_authmode);
1023 vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */
1024 estatus = IEEE80211_STATUS_ALG;
1029 if (frm + 1 < efrm) {
1030 if ((frm[1] + 2) > (efrm - frm)) {
1031 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1032 ni->ni_macaddr, "shared key auth",
1033 "ie %d/%d too long",
1034 frm[0], (frm[1] + 2) - (efrm - frm));
1035 vap->iv_stats.is_rx_bad_auth++;
1036 estatus = IEEE80211_STATUS_CHALLENGE;
1039 if (*frm == IEEE80211_ELEMID_CHALLENGE)
1044 case IEEE80211_AUTH_SHARED_CHALLENGE:
1045 case IEEE80211_AUTH_SHARED_RESPONSE:
1046 if (challenge == NULL) {
1047 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1048 ni->ni_macaddr, "shared key auth",
1049 "%s", "no challenge");
1050 vap->iv_stats.is_rx_bad_auth++;
1051 estatus = IEEE80211_STATUS_CHALLENGE;
1054 if (challenge[1] != IEEE80211_CHALLENGE_LEN) {
1055 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1056 ni->ni_macaddr, "shared key auth",
1057 "bad challenge len %d", challenge[1]);
1058 vap->iv_stats.is_rx_bad_auth++;
1059 estatus = IEEE80211_STATUS_CHALLENGE;
1066 case IEEE80211_AUTH_SHARED_REQUEST:
1067 if (ni == vap->iv_bss) {
1068 ni = ieee80211_dup_bss(vap, wh->i_addr2);
1070 /* NB: no way to return an error */
1075 if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0)
1076 (void) ieee80211_ref_node(ni);
1080 * Mark the node as referenced to reflect that it's
1081 * reference count has been bumped to insure it remains
1082 * after the transaction completes.
1084 ni->ni_flags |= IEEE80211_NODE_AREF;
1086 * Mark the node as requiring a valid association id
1087 * before outbound traffic is permitted.
1089 ni->ni_flags |= IEEE80211_NODE_ASSOCID;
1090 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1092 if (!ieee80211_alloc_challenge(ni)) {
1093 /* NB: don't return error so they rexmit */
1096 get_random_bytes(ni->ni_challenge,
1097 IEEE80211_CHALLENGE_LEN);
1098 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH,
1099 ni, "shared key %sauth request", allocbs ? "" : "re");
1101 * When the ACL policy is set to RADIUS we defer the
1102 * authorization to a user agent. Dispatch an event,
1103 * a subsequent MLME call will decide the fate of the
1104 * station. If the user agent is not present then the
1105 * node will be reclaimed due to inactivity.
1107 if (vap->iv_acl != NULL &&
1108 vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) {
1109 IEEE80211_NOTE_MAC(vap,
1110 IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL,
1112 "%s", "station authentication defered (radius acl)");
1113 ieee80211_notify_node_auth(ni);
1117 case IEEE80211_AUTH_SHARED_RESPONSE:
1118 if (ni == vap->iv_bss) {
1119 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1120 ni->ni_macaddr, "shared key response",
1121 "%s", "unknown station");
1122 /* NB: don't send a response */
1125 if (ni->ni_challenge == NULL) {
1126 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1127 ni->ni_macaddr, "shared key response",
1128 "%s", "no challenge recorded");
1129 vap->iv_stats.is_rx_bad_auth++;
1130 estatus = IEEE80211_STATUS_CHALLENGE;
1133 if (memcmp(ni->ni_challenge, &challenge[2],
1134 challenge[1]) != 0) {
1135 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1136 ni->ni_macaddr, "shared key response",
1137 "%s", "challenge mismatch");
1138 vap->iv_stats.is_rx_auth_fail++;
1139 estatus = IEEE80211_STATUS_CHALLENGE;
1142 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH,
1143 ni, "%s", "station authenticated (shared key)");
1144 ieee80211_node_authorize(ni);
1147 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1148 ni->ni_macaddr, "shared key auth",
1150 vap->iv_stats.is_rx_bad_auth++;
1151 estatus = IEEE80211_STATUS_SEQUENCE;
1154 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1);
1158 * Send an error response; but only when operating as an AP.
1160 /* XXX hack to workaround calling convention */
1161 ieee80211_send_error(ni, wh->i_addr2,
1162 IEEE80211_FC0_SUBTYPE_AUTH,
1163 (seq + 1) | (estatus<<16));
1167 * Convert a WPA cipher selector OUI to an internal
1168 * cipher algorithm. Where appropriate we also
1169 * record any key length.
1172 wpa_cipher(const uint8_t *sel, uint8_t *keylen, uint8_t *cipher)
1174 #define WPA_SEL(x) (((x)<<24)|WPA_OUI)
1175 uint32_t w = le32dec(sel);
1178 case WPA_SEL(WPA_CSE_NULL):
1179 *cipher = IEEE80211_CIPHER_NONE;
1181 case WPA_SEL(WPA_CSE_WEP40):
1183 *keylen = 40 / NBBY;
1184 *cipher = IEEE80211_CIPHER_WEP;
1186 case WPA_SEL(WPA_CSE_WEP104):
1188 *keylen = 104 / NBBY;
1189 *cipher = IEEE80211_CIPHER_WEP;
1191 case WPA_SEL(WPA_CSE_TKIP):
1192 *cipher = IEEE80211_CIPHER_TKIP;
1194 case WPA_SEL(WPA_CSE_CCMP):
1195 *cipher = IEEE80211_CIPHER_AES_CCM;
1206 * Convert a WPA key management/authentication algorithm
1207 * to an internal code.
1210 wpa_keymgmt(const uint8_t *sel)
1212 #define WPA_SEL(x) (((x)<<24)|WPA_OUI)
1213 uint32_t w = le32dec(sel);
1216 case WPA_SEL(WPA_ASE_8021X_UNSPEC):
1217 return WPA_ASE_8021X_UNSPEC;
1218 case WPA_SEL(WPA_ASE_8021X_PSK):
1219 return WPA_ASE_8021X_PSK;
1220 case WPA_SEL(WPA_ASE_NONE):
1221 return WPA_ASE_NONE;
1223 return 0; /* NB: so is discarded */
1228 * Parse a WPA information element to collect parameters.
1229 * Note that we do not validate security parameters; that
1230 * is handled by the authenticator; the parsing done here
1231 * is just for internal use in making operational decisions.
1234 ieee80211_parse_wpa(struct ieee80211vap *vap, const uint8_t *frm,
1235 struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh)
1237 uint8_t len = frm[1];
1242 * Check the length once for fixed parts: OUI, type,
1243 * version, mcast cipher, and 2 selector counts.
1244 * Other, variable-length data, must be checked separately.
1246 if ((vap->iv_flags & IEEE80211_F_WPA1) == 0) {
1247 IEEE80211_DISCARD_IE(vap,
1248 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1249 wh, "WPA", "not WPA, flags 0x%x", vap->iv_flags);
1250 return IEEE80211_REASON_IE_INVALID;
1253 IEEE80211_DISCARD_IE(vap,
1254 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1255 wh, "WPA", "too short, len %u", len);
1256 return IEEE80211_REASON_IE_INVALID;
1258 frm += 6, len -= 4; /* NB: len is payload only */
1259 /* NB: iswpaoui already validated the OUI and type */
1261 if (w != WPA_VERSION) {
1262 IEEE80211_DISCARD_IE(vap,
1263 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1264 wh, "WPA", "bad version %u", w);
1265 return IEEE80211_REASON_IE_INVALID;
1269 memset(rsn, 0, sizeof(*rsn));
1271 /* multicast/group cipher */
1272 error = wpa_cipher(frm, &rsn->rsn_mcastkeylen, &rsn->rsn_mcastcipher);
1274 IEEE80211_DISCARD_IE(vap,
1275 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1276 wh, "WPA", "unknown mcast cipher suite %08X",
1278 return IEEE80211_REASON_GROUP_CIPHER_INVALID;
1282 /* unicast ciphers */
1286 IEEE80211_DISCARD_IE(vap,
1287 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1288 wh, "WPA", "ucast cipher data too short; len %u, n %u",
1290 return IEEE80211_REASON_IE_INVALID;
1293 for (; n > 0; n--) {
1296 error = wpa_cipher(frm, &rsn->rsn_ucastkeylen, &cipher);
1303 IEEE80211_DISCARD_IE(vap,
1304 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1305 wh, "WPA", "no usable pairwise cipher suite found (w=%d)",
1307 return IEEE80211_REASON_PAIRWISE_CIPHER_INVALID;
1310 if (w & (1 << IEEE80211_CIPHER_AES_CCM))
1311 rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM;
1313 rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP;
1315 /* key management algorithms */
1319 IEEE80211_DISCARD_IE(vap,
1320 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1321 wh, "WPA", "key mgmt alg data too short; len %u, n %u",
1323 return IEEE80211_REASON_IE_INVALID;
1326 for (; n > 0; n--) {
1327 w |= wpa_keymgmt(frm);
1330 if (w & WPA_ASE_8021X_UNSPEC)
1331 rsn->rsn_keymgmt = WPA_ASE_8021X_UNSPEC;
1333 rsn->rsn_keymgmt = WPA_ASE_8021X_PSK;
1335 if (len > 2) /* optional capabilities */
1336 rsn->rsn_caps = le16dec(frm);
1342 * Convert an RSN cipher selector OUI to an internal
1343 * cipher algorithm. Where appropriate we also
1344 * record any key length.
1347 rsn_cipher(const uint8_t *sel, uint8_t *keylen, uint8_t *cipher)
1349 #define RSN_SEL(x) (((x)<<24)|RSN_OUI)
1350 uint32_t w = le32dec(sel);
1353 case RSN_SEL(RSN_CSE_NULL):
1354 *cipher = IEEE80211_CIPHER_NONE;
1356 case RSN_SEL(RSN_CSE_WEP40):
1358 *keylen = 40 / NBBY;
1359 *cipher = IEEE80211_CIPHER_WEP;
1361 case RSN_SEL(RSN_CSE_WEP104):
1363 *keylen = 104 / NBBY;
1364 *cipher = IEEE80211_CIPHER_WEP;
1366 case RSN_SEL(RSN_CSE_TKIP):
1367 *cipher = IEEE80211_CIPHER_TKIP;
1369 case RSN_SEL(RSN_CSE_CCMP):
1370 *cipher = IEEE80211_CIPHER_AES_CCM;
1372 case RSN_SEL(RSN_CSE_WRAP):
1373 *cipher = IEEE80211_CIPHER_AES_OCB;
1384 * Convert an RSN key management/authentication algorithm
1385 * to an internal code.
1388 rsn_keymgmt(const uint8_t *sel)
1390 #define RSN_SEL(x) (((x)<<24)|RSN_OUI)
1391 uint32_t w = le32dec(sel);
1394 case RSN_SEL(RSN_ASE_8021X_UNSPEC):
1395 return RSN_ASE_8021X_UNSPEC;
1396 case RSN_SEL(RSN_ASE_8021X_PSK):
1397 return RSN_ASE_8021X_PSK;
1398 case RSN_SEL(RSN_ASE_NONE):
1399 return RSN_ASE_NONE;
1401 return 0; /* NB: so is discarded */
1406 * Parse a WPA/RSN information element to collect parameters
1407 * and validate the parameters against what has been
1408 * configured for the system.
1411 ieee80211_parse_rsn(struct ieee80211vap *vap, const uint8_t *frm,
1412 struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh)
1414 uint8_t len = frm[1];
1419 * Check the length once for fixed parts:
1420 * version, mcast cipher, and 2 selector counts.
1421 * Other, variable-length data, must be checked separately.
1423 if ((vap->iv_flags & IEEE80211_F_WPA2) == 0) {
1424 IEEE80211_DISCARD_IE(vap,
1425 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1426 wh, "WPA", "not RSN, flags 0x%x", vap->iv_flags);
1427 return IEEE80211_REASON_IE_INVALID;
1429 /* XXX may be shorter */
1431 IEEE80211_DISCARD_IE(vap,
1432 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1433 wh, "RSN", "too short, len %u", len);
1434 return IEEE80211_REASON_IE_INVALID;
1438 if (w != RSN_VERSION) {
1439 IEEE80211_DISCARD_IE(vap,
1440 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1441 wh, "RSN", "bad version %u", w);
1442 return IEEE80211_REASON_UNSUPP_RSN_IE_VERSION;
1446 memset(rsn, 0, sizeof(*rsn));
1448 /* multicast/group cipher */
1449 error = rsn_cipher(frm, &rsn->rsn_mcastkeylen, &rsn->rsn_mcastcipher);
1451 IEEE80211_DISCARD_IE(vap,
1452 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1453 wh, "RSN", "unknown mcast cipher suite %08X",
1455 return IEEE80211_REASON_GROUP_CIPHER_INVALID;
1457 if (rsn->rsn_mcastcipher == IEEE80211_CIPHER_NONE) {
1458 IEEE80211_DISCARD_IE(vap,
1459 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1460 wh, "RSN", "invalid mcast cipher suite %d",
1461 rsn->rsn_mcastcipher);
1462 return IEEE80211_REASON_GROUP_CIPHER_INVALID;
1466 /* unicast ciphers */
1470 IEEE80211_DISCARD_IE(vap,
1471 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1472 wh, "RSN", "ucast cipher data too short; len %u, n %u",
1474 return IEEE80211_REASON_IE_INVALID;
1478 for (; n > 0; n--) {
1481 error = rsn_cipher(frm, &rsn->rsn_ucastkeylen, &cipher);
1487 if (w & (1 << IEEE80211_CIPHER_AES_CCM))
1488 rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM;
1489 else if (w & (1 << IEEE80211_CIPHER_AES_OCB))
1490 rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_OCB;
1491 else if (w & (1 << IEEE80211_CIPHER_TKIP))
1492 rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP;
1493 else if ((w & (1 << IEEE80211_CIPHER_NONE)) &&
1494 (rsn->rsn_mcastcipher == IEEE80211_CIPHER_WEP ||
1495 rsn->rsn_mcastcipher == IEEE80211_CIPHER_TKIP))
1496 rsn->rsn_ucastcipher = IEEE80211_CIPHER_NONE;
1498 IEEE80211_DISCARD_IE(vap,
1499 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1500 wh, "RSN", "no usable pairwise cipher suite found (w=%d)",
1502 return IEEE80211_REASON_PAIRWISE_CIPHER_INVALID;
1505 /* key management algorithms */
1509 IEEE80211_DISCARD_IE(vap,
1510 IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1511 wh, "RSN", "key mgmt alg data too short; len %u, n %u",
1513 return IEEE80211_REASON_IE_INVALID;
1516 for (; n > 0; n--) {
1517 w |= rsn_keymgmt(frm);
1520 if (w & RSN_ASE_8021X_UNSPEC)
1521 rsn->rsn_keymgmt = RSN_ASE_8021X_UNSPEC;
1523 rsn->rsn_keymgmt = RSN_ASE_8021X_PSK;
1525 /* optional RSN capabilities */
1527 rsn->rsn_caps = le16dec(frm);
1534 * WPA/802.11i association request processing.
1537 wpa_assocreq(struct ieee80211_node *ni, struct ieee80211_rsnparms *rsnparms,
1538 const struct ieee80211_frame *wh, const uint8_t *wpa,
1539 const uint8_t *rsn, uint16_t capinfo)
1541 struct ieee80211vap *vap = ni->ni_vap;
1545 ni->ni_flags &= ~(IEEE80211_NODE_WPS|IEEE80211_NODE_TSN);
1546 if (wpa == NULL && rsn == NULL) {
1547 if (vap->iv_flags_ext & IEEE80211_FEXT_WPS) {
1549 * W-Fi Protected Setup (WPS) permits
1550 * clients to associate and pass EAPOL frames
1551 * to establish initial credentials.
1553 ni->ni_flags |= IEEE80211_NODE_WPS;
1556 if ((vap->iv_flags_ext & IEEE80211_FEXT_TSN) &&
1557 (capinfo & IEEE80211_CAPINFO_PRIVACY)) {
1559 * Transitional Security Network. Permits clients
1560 * to associate and use WEP while WPA is configured.
1562 ni->ni_flags |= IEEE80211_NODE_TSN;
1565 IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA,
1566 wh, NULL, "%s", "no WPA/RSN IE in association request");
1567 vap->iv_stats.is_rx_assoc_badwpaie++;
1568 reason = IEEE80211_REASON_IE_INVALID;
1571 /* assert right association security credentials */
1572 badwparsn = 0; /* NB: to silence compiler */
1573 switch (vap->iv_flags & IEEE80211_F_WPA) {
1574 case IEEE80211_F_WPA1:
1575 badwparsn = (wpa == NULL);
1577 case IEEE80211_F_WPA2:
1578 badwparsn = (rsn == NULL);
1580 case IEEE80211_F_WPA1|IEEE80211_F_WPA2:
1581 badwparsn = (wpa == NULL && rsn == NULL);
1585 IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA,
1587 "%s", "missing WPA/RSN IE in association request");
1588 vap->iv_stats.is_rx_assoc_badwpaie++;
1589 reason = IEEE80211_REASON_IE_INVALID;
1593 * Parse WPA/RSN information element.
1596 reason = ieee80211_parse_wpa(vap, wpa, rsnparms, wh);
1598 reason = ieee80211_parse_rsn(vap, rsn, rsnparms, wh);
1600 /* XXX wpa->rsn fallback? */
1601 /* XXX distinguish WPA/RSN? */
1602 vap->iv_stats.is_rx_assoc_badwpaie++;
1605 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, ni,
1606 "%s ie: mc %u/%u uc %u/%u key %u caps 0x%x",
1607 wpa != NULL ? "WPA" : "RSN",
1608 rsnparms->rsn_mcastcipher, rsnparms->rsn_mcastkeylen,
1609 rsnparms->rsn_ucastcipher, rsnparms->rsn_ucastkeylen,
1610 rsnparms->rsn_keymgmt, rsnparms->rsn_caps);
1614 ieee80211_node_deauth(ni, reason);
1618 /* XXX find a better place for definition */
1619 struct l2_update_frame {
1620 struct ether_header eh;
1628 * Deliver a TGf L2UF frame on behalf of a station.
1629 * This primes any bridge when the station is roaming
1630 * between ap's on the same wired network.
1633 ieee80211_deliver_l2uf(struct ieee80211_node *ni)
1635 struct ieee80211vap *vap = ni->ni_vap;
1636 struct ifnet *ifp = vap->iv_ifp;
1638 struct l2_update_frame *l2uf;
1639 struct ether_header *eh;
1641 m = m_gethdr(M_NOWAIT, MT_DATA);
1643 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
1644 "%s", "no mbuf for l2uf frame");
1645 vap->iv_stats.is_rx_nobuf++; /* XXX not right */
1648 l2uf = mtod(m, struct l2_update_frame *);
1650 /* dst: Broadcast address */
1651 IEEE80211_ADDR_COPY(eh->ether_dhost, ifp->if_broadcastaddr);
1652 /* src: associated STA */
1653 IEEE80211_ADDR_COPY(eh->ether_shost, ni->ni_macaddr);
1654 eh->ether_type = htons(sizeof(*l2uf) - sizeof(*eh));
1658 l2uf->control = 0xf5;
1659 l2uf->xid[0] = 0x81;
1660 l2uf->xid[1] = 0x80;
1661 l2uf->xid[2] = 0x00;
1663 m->m_pkthdr.len = m->m_len = sizeof(*l2uf);
1664 hostap_deliver_data(vap, ni, m);
1668 ratesetmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1669 int reassoc, int resp, const char *tag, int rate)
1671 IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2,
1672 "deny %s request, %s rate set mismatch, rate/MCS %d",
1673 reassoc ? "reassoc" : "assoc", tag, rate & IEEE80211_RATE_VAL);
1674 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_BASIC_RATE);
1675 ieee80211_node_leave(ni);
1679 capinfomismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1680 int reassoc, int resp, const char *tag, int capinfo)
1682 struct ieee80211vap *vap = ni->ni_vap;
1684 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2,
1685 "deny %s request, %s mismatch 0x%x",
1686 reassoc ? "reassoc" : "assoc", tag, capinfo);
1687 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_CAPINFO);
1688 ieee80211_node_leave(ni);
1689 vap->iv_stats.is_rx_assoc_capmismatch++;
1693 htcapmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1694 int reassoc, int resp)
1696 IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2,
1697 "deny %s request, %s missing HT ie", reassoc ? "reassoc" : "assoc");
1698 /* XXX no better code */
1699 IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_MISSING_HT_CAPS);
1700 ieee80211_node_leave(ni);
1704 authalgreject(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1705 int algo, int seq, int status)
1707 struct ieee80211vap *vap = ni->ni_vap;
1709 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1710 wh, NULL, "unsupported alg %d", algo);
1711 vap->iv_stats.is_rx_auth_unsupported++;
1712 ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_AUTH,
1713 seq | (status << 16));
1717 ishtmixed(const uint8_t *ie)
1719 const struct ieee80211_ie_htinfo *ht =
1720 (const struct ieee80211_ie_htinfo *) ie;
1721 return (ht->hi_byte2 & IEEE80211_HTINFO_OPMODE) ==
1722 IEEE80211_HTINFO_OPMODE_MIXED;
1726 is11bclient(const uint8_t *rates, const uint8_t *xrates)
1728 static const uint32_t brates = (1<<2*1)|(1<<2*2)|(1<<11)|(1<<2*11);
1731 /* NB: the 11b clients we care about will not have xrates */
1732 if (xrates != NULL || rates == NULL)
1734 for (i = 0; i < rates[1]; i++) {
1735 int r = rates[2+i] & IEEE80211_RATE_VAL;
1736 if (r > 2*11 || ((1<<r) & brates) == 0)
1743 hostap_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0,
1744 int subtype, const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1746 struct ieee80211vap *vap = ni->ni_vap;
1747 struct ieee80211com *ic = ni->ni_ic;
1748 struct ieee80211_frame *wh;
1749 uint8_t *frm, *efrm, *sfrm;
1750 uint8_t *ssid, *rates, *xrates, *wpa, *rsn, *wme, *ath, *htcap;
1751 uint8_t *vhtcap, *vhtinfo;
1755 wh = mtod(m0, struct ieee80211_frame *);
1756 frm = (uint8_t *)&wh[1];
1757 efrm = mtod(m0, uint8_t *) + m0->m_len;
1759 case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1761 * We process beacon/probe response frames when scanning;
1762 * otherwise we check beacon frames for overlapping non-ERP
1763 * BSS in 11g and/or overlapping legacy BSS when in HT.
1765 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1766 vap->iv_stats.is_rx_mgtdiscard++;
1770 case IEEE80211_FC0_SUBTYPE_BEACON: {
1771 struct ieee80211_scanparams scan;
1773 /* NB: accept off-channel frames */
1774 /* XXX TODO: use rxstatus to determine off-channel details */
1775 if (ieee80211_parse_beacon(ni, m0, ic->ic_curchan, &scan) &~ IEEE80211_BPARSE_OFFCHAN)
1778 * Count frame now that we know it's to be processed.
1780 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1781 vap->iv_stats.is_rx_beacon++; /* XXX remove */
1782 IEEE80211_NODE_STAT(ni, rx_beacons);
1784 IEEE80211_NODE_STAT(ni, rx_proberesp);
1786 * If scanning, just pass information to the scan module.
1788 if (ic->ic_flags & IEEE80211_F_SCAN) {
1789 if (scan.status == 0 && /* NB: on channel */
1790 (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN)) {
1792 * Actively scanning a channel marked passive;
1793 * send a probe request now that we know there
1794 * is 802.11 traffic present.
1796 * XXX check if the beacon we recv'd gives
1797 * us what we need and suppress the probe req
1799 ieee80211_probe_curchan(vap, 1);
1800 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1802 ieee80211_add_scan(vap, ic->ic_curchan, &scan, wh,
1807 * Check beacon for overlapping bss w/ non ERP stations.
1808 * If we detect one and protection is configured but not
1809 * enabled, enable it and start a timer that'll bring us
1810 * out if we stop seeing the bss.
1812 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
1813 scan.status == 0 && /* NB: on-channel */
1814 ((scan.erp & 0x100) == 0 || /* NB: no ERP, 11b sta*/
1815 (scan.erp & IEEE80211_ERP_NON_ERP_PRESENT))) {
1816 vap->iv_lastnonerp = ticks;
1817 vap->iv_flags_ext |= IEEE80211_FEXT_NONERP_PR;
1819 * XXX TODO: this may need to check all VAPs?
1821 if (vap->iv_protmode != IEEE80211_PROT_NONE &&
1822 (vap->iv_flags & IEEE80211_F_USEPROT) == 0) {
1823 IEEE80211_NOTE_FRAME(vap,
1824 IEEE80211_MSG_ASSOC, wh,
1825 "non-ERP present on channel %d "
1826 "(saw erp 0x%x from channel %d), "
1827 "enable use of protection",
1828 ic->ic_curchan->ic_ieee,
1829 scan.erp, scan.chan);
1830 vap->iv_flags |= IEEE80211_F_USEPROT;
1831 ieee80211_vap_update_erp_protmode(vap);
1835 * Check beacon for non-HT station on HT channel
1836 * and update HT BSS occupancy as appropriate.
1838 if (IEEE80211_IS_CHAN_HT(ic->ic_curchan)) {
1839 if (scan.status & IEEE80211_BPARSE_OFFCHAN) {
1841 * Off control channel; only check frames
1842 * that come in the extension channel when
1843 * operating w/ HT40.
1845 if (!IEEE80211_IS_CHAN_HT40(ic->ic_curchan))
1847 if (scan.chan != ic->ic_curchan->ic_extieee)
1850 if (scan.htinfo == NULL) {
1851 ieee80211_htprot_update(vap,
1852 IEEE80211_HTINFO_OPMODE_PROTOPT |
1853 IEEE80211_HTINFO_NONHT_PRESENT);
1854 } else if (ishtmixed(scan.htinfo)) {
1855 /* XXX? take NONHT_PRESENT from beacon? */
1856 ieee80211_htprot_update(vap,
1857 IEEE80211_HTINFO_OPMODE_MIXED |
1858 IEEE80211_HTINFO_NONHT_PRESENT);
1864 case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1865 if (vap->iv_state != IEEE80211_S_RUN) {
1866 vap->iv_stats.is_rx_mgtdiscard++;
1870 * Consult the ACL policy module if setup.
1872 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1873 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1874 wh, NULL, "%s", "disallowed by ACL");
1875 vap->iv_stats.is_rx_acl++;
1879 * prreq frame format
1881 * [tlv] supported rates
1882 * [tlv] extended supported rates
1884 ssid = rates = xrates = NULL;
1885 while (efrm - frm > 1) {
1886 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1888 case IEEE80211_ELEMID_SSID:
1891 case IEEE80211_ELEMID_RATES:
1894 case IEEE80211_ELEMID_XRATES:
1900 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
1902 IEEE80211_VERIFY_ELEMENT(xrates,
1903 IEEE80211_RATE_MAXSIZE - rates[1], return);
1904 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
1905 IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return);
1906 if ((vap->iv_flags & IEEE80211_F_HIDESSID) && ssid[1] == 0) {
1907 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1909 "%s", "no ssid with ssid suppression enabled");
1910 vap->iv_stats.is_rx_ssidmismatch++; /*XXX*/
1914 /* XXX find a better class or define it's own */
1915 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
1916 "%s", "recv probe req");
1918 * Some legacy 11b clients cannot hack a complete
1919 * probe response frame. When the request includes
1920 * only a bare-bones rate set, communicate this to
1921 * the transmit side.
1923 ieee80211_send_proberesp(vap, wh->i_addr2,
1924 is11bclient(rates, xrates) ? IEEE80211_SEND_LEGACY_11B : 0);
1927 case IEEE80211_FC0_SUBTYPE_AUTH: {
1928 uint16_t algo, seq, status;
1930 if (vap->iv_state != IEEE80211_S_RUN) {
1931 vap->iv_stats.is_rx_mgtdiscard++;
1934 if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) {
1935 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1936 wh, NULL, "%s", "wrong bssid");
1937 vap->iv_stats.is_rx_wrongbss++; /*XXX unique stat?*/
1947 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return);
1948 algo = le16toh(*(uint16_t *)frm);
1949 seq = le16toh(*(uint16_t *)(frm + 2));
1950 status = le16toh(*(uint16_t *)(frm + 4));
1951 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2,
1952 "recv auth frame with algorithm %d seq %d", algo, seq);
1954 * Consult the ACL policy module if setup.
1956 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1957 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1958 wh, NULL, "%s", "disallowed by ACL");
1959 vap->iv_stats.is_rx_acl++;
1960 ieee80211_send_error(ni, wh->i_addr2,
1961 IEEE80211_FC0_SUBTYPE_AUTH,
1962 (seq+1) | (IEEE80211_STATUS_UNSPECIFIED<<16));
1965 if (vap->iv_flags & IEEE80211_F_COUNTERM) {
1966 IEEE80211_DISCARD(vap,
1967 IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO,
1968 wh, NULL, "%s", "TKIP countermeasures enabled");
1969 vap->iv_stats.is_rx_auth_countermeasures++;
1970 ieee80211_send_error(ni, wh->i_addr2,
1971 IEEE80211_FC0_SUBTYPE_AUTH,
1972 IEEE80211_REASON_MIC_FAILURE);
1975 if (algo == IEEE80211_AUTH_ALG_SHARED)
1976 hostap_auth_shared(ni, wh, frm + 6, efrm, rssi, nf,
1978 else if (algo == IEEE80211_AUTH_ALG_OPEN)
1979 hostap_auth_open(ni, wh, rssi, nf, seq, status);
1980 else if (algo == IEEE80211_AUTH_ALG_LEAP) {
1981 authalgreject(ni, wh, algo,
1982 seq+1, IEEE80211_STATUS_ALG);
1986 * We assume that an unknown algorithm is the result
1987 * of a decryption failure on a shared key auth frame;
1988 * return a status code appropriate for that instead
1989 * of IEEE80211_STATUS_ALG.
1991 * NB: a seq# of 4 is intentional; the decrypted
1992 * frame likely has a bogus seq value.
1994 authalgreject(ni, wh, algo,
1995 4, IEEE80211_STATUS_CHALLENGE);
2001 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
2002 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: {
2003 uint16_t capinfo, lintval;
2004 struct ieee80211_rsnparms rsnparms;
2006 if (vap->iv_state != IEEE80211_S_RUN) {
2007 vap->iv_stats.is_rx_mgtdiscard++;
2010 if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) {
2011 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2012 wh, NULL, "%s", "wrong bssid");
2013 vap->iv_stats.is_rx_assoc_bss++;
2016 if (subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) {
2018 resp = IEEE80211_FC0_SUBTYPE_REASSOC_RESP;
2021 resp = IEEE80211_FC0_SUBTYPE_ASSOC_RESP;
2023 if (ni == vap->iv_bss) {
2024 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2,
2025 "deny %s request, sta not authenticated",
2026 reassoc ? "reassoc" : "assoc");
2027 ieee80211_send_error(ni, wh->i_addr2,
2028 IEEE80211_FC0_SUBTYPE_DEAUTH,
2029 IEEE80211_REASON_ASSOC_NOT_AUTHED);
2030 vap->iv_stats.is_rx_assoc_notauth++;
2035 * asreq frame format
2036 * [2] capability information
2037 * [2] listen interval
2038 * [6*] current AP address (reassoc only)
2040 * [tlv] supported rates
2041 * [tlv] extended supported rates
2043 * [tlv] HT capabilities
2044 * [tlv] Atheros capabilities
2046 IEEE80211_VERIFY_LENGTH(efrm - frm, (reassoc ? 10 : 4), return);
2047 capinfo = le16toh(*(uint16_t *)frm); frm += 2;
2048 lintval = le16toh(*(uint16_t *)frm); frm += 2;
2050 frm += 6; /* ignore current AP info */
2051 ssid = rates = xrates = wpa = rsn = wme = ath = htcap = NULL;
2052 vhtcap = vhtinfo = NULL;
2054 while (efrm - frm > 1) {
2055 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
2057 case IEEE80211_ELEMID_SSID:
2060 case IEEE80211_ELEMID_RATES:
2063 case IEEE80211_ELEMID_XRATES:
2066 case IEEE80211_ELEMID_RSN:
2069 case IEEE80211_ELEMID_HTCAP:
2072 case IEEE80211_ELEMID_VHT_CAP:
2075 case IEEE80211_ELEMID_VHT_OPMODE:
2078 case IEEE80211_ELEMID_VENDOR:
2081 else if (iswmeinfo(frm))
2083 #ifdef IEEE80211_SUPPORT_SUPERG
2084 else if (isatherosoui(frm))
2087 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) {
2088 if (ishtcapoui(frm) && htcap == NULL)
2095 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
2097 IEEE80211_VERIFY_ELEMENT(xrates,
2098 IEEE80211_RATE_MAXSIZE - rates[1], return);
2099 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
2100 IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return);
2101 if (htcap != NULL) {
2102 IEEE80211_VERIFY_LENGTH(htcap[1],
2103 htcap[0] == IEEE80211_ELEMID_VENDOR ?
2104 4 + sizeof(struct ieee80211_ie_htcap)-2 :
2105 sizeof(struct ieee80211_ie_htcap)-2,
2106 return); /* XXX just NULL out? */
2109 /* Validate VHT IEs */
2110 if (vhtcap != NULL) {
2111 IEEE80211_VERIFY_LENGTH(vhtcap[1],
2112 sizeof(struct ieee80211_ie_vhtcap) - 2,
2115 if (vhtinfo != NULL) {
2116 IEEE80211_VERIFY_LENGTH(vhtinfo[1],
2117 sizeof(struct ieee80211_ie_vht_operation) - 2,
2121 if ((vap->iv_flags & IEEE80211_F_WPA) &&
2122 !wpa_assocreq(ni, &rsnparms, wh, wpa, rsn, capinfo))
2124 /* discard challenge after association */
2125 if (ni->ni_challenge != NULL) {
2126 IEEE80211_FREE(ni->ni_challenge, M_80211_NODE);
2127 ni->ni_challenge = NULL;
2129 /* NB: 802.11 spec says to ignore station's privacy bit */
2130 if ((capinfo & IEEE80211_CAPINFO_ESS) == 0) {
2131 capinfomismatch(ni, wh, reassoc, resp,
2132 "capability", capinfo);
2136 * Disallow re-associate w/ invalid slot time setting.
2138 if (ni->ni_associd != 0 &&
2139 IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2140 ((ni->ni_capinfo ^ capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME)) {
2141 capinfomismatch(ni, wh, reassoc, resp,
2142 "slot time", capinfo);
2145 rate = ieee80211_setup_rates(ni, rates, xrates,
2146 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
2147 IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
2148 if (rate & IEEE80211_RATE_BASIC) {
2149 ratesetmismatch(ni, wh, reassoc, resp, "legacy", rate);
2150 vap->iv_stats.is_rx_assoc_norate++;
2154 * If constrained to 11g-only stations reject an
2155 * 11b-only station. We cheat a bit here by looking
2156 * at the max negotiated xmit rate and assuming anyone
2157 * with a best rate <24Mb/s is an 11b station.
2159 if ((vap->iv_flags & IEEE80211_F_PUREG) && rate < 48) {
2160 ratesetmismatch(ni, wh, reassoc, resp, "11g", rate);
2161 vap->iv_stats.is_rx_assoc_norate++;
2166 * Do HT rate set handling and setup HT node state.
2168 ni->ni_chan = vap->iv_bss->ni_chan;
2171 if (IEEE80211_IS_CHAN_VHT(ni->ni_chan) &&
2174 /* XXX TODO; see below */
2175 printf("%s: VHT TODO!\n", __func__);
2176 ieee80211_vht_node_init(ni);
2177 ieee80211_vht_update_cap(ni, vhtcap, vhtinfo);
2178 } else if (ni->ni_flags & IEEE80211_NODE_VHT)
2179 ieee80211_vht_node_cleanup(ni);
2182 if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && htcap != NULL) {
2183 rate = ieee80211_setup_htrates(ni, htcap,
2184 IEEE80211_F_DOFMCS | IEEE80211_F_DONEGO |
2186 if (rate & IEEE80211_RATE_BASIC) {
2187 ratesetmismatch(ni, wh, reassoc, resp,
2189 vap->iv_stats.is_ht_assoc_norate++;
2192 ieee80211_ht_node_init(ni);
2193 ieee80211_ht_updatehtcap(ni, htcap);
2194 } else if (ni->ni_flags & IEEE80211_NODE_HT)
2195 ieee80211_ht_node_cleanup(ni);
2197 /* Finally - this will use HT/VHT info to change node channel */
2198 if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && htcap != NULL) {
2199 ieee80211_ht_updatehtcap_final(ni);
2202 #ifdef IEEE80211_SUPPORT_SUPERG
2203 /* Always do ff node cleanup; for A-MSDU */
2204 ieee80211_ff_node_cleanup(ni);
2207 * Allow AMPDU operation only with unencrypted traffic
2208 * or AES-CCM; the 11n spec only specifies these ciphers
2209 * so permitting any others is undefined and can lead
2210 * to interoperability problems.
2212 if ((ni->ni_flags & IEEE80211_NODE_HT) &&
2213 (((vap->iv_flags & IEEE80211_F_WPA) &&
2214 rsnparms.rsn_ucastcipher != IEEE80211_CIPHER_AES_CCM) ||
2215 (vap->iv_flags & (IEEE80211_F_WPA|IEEE80211_F_PRIVACY)) == IEEE80211_F_PRIVACY)) {
2217 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni,
2218 "disallow HT use because WEP or TKIP requested, "
2219 "capinfo 0x%x ucastcipher %d", capinfo,
2220 rsnparms.rsn_ucastcipher);
2221 ieee80211_ht_node_cleanup(ni);
2222 #ifdef IEEE80211_SUPPORT_SUPERG
2223 /* Always do ff node cleanup; for A-MSDU */
2224 ieee80211_ff_node_cleanup(ni);
2226 vap->iv_stats.is_ht_assoc_downgrade++;
2229 * If constrained to 11n-only stations reject legacy stations.
2231 if ((vap->iv_flags_ht & IEEE80211_FHT_PUREN) &&
2232 (ni->ni_flags & IEEE80211_NODE_HT) == 0) {
2233 htcapmismatch(ni, wh, reassoc, resp);
2234 vap->iv_stats.is_ht_assoc_nohtcap++;
2237 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
2239 ni->ni_intval = lintval;
2240 ni->ni_capinfo = capinfo;
2241 ni->ni_fhdwell = vap->iv_bss->ni_fhdwell;
2242 ni->ni_fhindex = vap->iv_bss->ni_fhindex;
2245 * XXX maybe better to just expand
2247 if (ieee80211_ies_init(&ni->ni_ies, sfrm, efrm - sfrm)) {
2248 #define setie(_ie, _off) ieee80211_ies_setie(ni->ni_ies, _ie, _off)
2250 setie(wpa_ie, wpa - sfrm);
2252 setie(rsn_ie, rsn - sfrm);
2254 setie(htcap_ie, htcap - sfrm);
2256 setie(wme_ie, wme - sfrm);
2258 * Mark node as capable of QoS.
2260 ni->ni_flags |= IEEE80211_NODE_QOS;
2261 if (ieee80211_parse_wmeie(wme, wh, ni) > 0) {
2262 if (ni->ni_uapsd != 0)
2264 IEEE80211_NODE_UAPSD;
2267 ~IEEE80211_NODE_UAPSD;
2271 ~(IEEE80211_NODE_QOS |
2272 IEEE80211_NODE_UAPSD);
2273 #ifdef IEEE80211_SUPPORT_SUPERG
2275 setie(ath_ie, ath - sfrm);
2277 * Parse ATH station parameters.
2279 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
2282 ni->ni_ath_flags = 0;
2285 ni->ni_flags &= ~IEEE80211_NODE_QOS;
2286 ni->ni_flags &= ~IEEE80211_NODE_UAPSD;
2287 ni->ni_ath_flags = 0;
2289 ieee80211_node_join(ni, resp);
2290 ieee80211_deliver_l2uf(ni);
2294 case IEEE80211_FC0_SUBTYPE_DEAUTH:
2295 case IEEE80211_FC0_SUBTYPE_DISASSOC: {
2298 if (vap->iv_state != IEEE80211_S_RUN ||
2299 /* NB: can happen when in promiscuous mode */
2300 !IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) {
2301 vap->iv_stats.is_rx_mgtdiscard++;
2305 * deauth/disassoc frame format
2308 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return);
2309 reason = le16toh(*(uint16_t *)frm);
2310 if (subtype == IEEE80211_FC0_SUBTYPE_DEAUTH) {
2311 vap->iv_stats.is_rx_deauth++;
2312 IEEE80211_NODE_STAT(ni, rx_deauth);
2314 vap->iv_stats.is_rx_disassoc++;
2315 IEEE80211_NODE_STAT(ni, rx_disassoc);
2317 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni,
2318 "recv %s (reason: %d (%s))",
2319 ieee80211_mgt_subtype_name(subtype),
2320 reason, ieee80211_reason_to_string(reason));
2321 if (ni != vap->iv_bss)
2322 ieee80211_node_leave(ni);
2326 case IEEE80211_FC0_SUBTYPE_ACTION:
2327 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
2328 if (ni == vap->iv_bss) {
2329 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2330 wh, NULL, "%s", "unknown node");
2331 vap->iv_stats.is_rx_mgtdiscard++;
2332 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
2333 !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2334 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2335 wh, NULL, "%s", "not for us");
2336 vap->iv_stats.is_rx_mgtdiscard++;
2337 } else if (vap->iv_state != IEEE80211_S_RUN) {
2338 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2339 wh, NULL, "wrong state %s",
2340 ieee80211_state_name[vap->iv_state]);
2341 vap->iv_stats.is_rx_mgtdiscard++;
2343 if (ieee80211_parse_action(ni, m0) == 0)
2344 (void)ic->ic_recv_action(ni, wh, frm, efrm);
2348 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2349 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2350 case IEEE80211_FC0_SUBTYPE_TIMING_ADV:
2351 case IEEE80211_FC0_SUBTYPE_ATIM:
2352 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2353 wh, NULL, "%s", "not handled");
2354 vap->iv_stats.is_rx_mgtdiscard++;
2358 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2359 wh, "mgt", "subtype 0x%x not handled", subtype);
2360 vap->iv_stats.is_rx_badsubtype++;
2366 hostap_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
2369 case IEEE80211_FC0_SUBTYPE_PS_POLL:
2370 ni->ni_vap->iv_recv_pspoll(ni, m);
2372 case IEEE80211_FC0_SUBTYPE_BAR:
2373 ieee80211_recv_bar(ni, m);
2379 * Process a received ps-poll frame.
2382 ieee80211_recv_pspoll(struct ieee80211_node *ni, struct mbuf *m0)
2384 struct ieee80211vap *vap = ni->ni_vap;
2385 struct ieee80211com *ic = vap->iv_ic;
2386 struct ieee80211_frame_min *wh;
2391 wh = mtod(m0, struct ieee80211_frame_min *);
2392 if (ni->ni_associd == 0) {
2393 IEEE80211_DISCARD(vap,
2394 IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG,
2395 (struct ieee80211_frame *) wh, NULL,
2396 "%s", "unassociated station");
2397 vap->iv_stats.is_ps_unassoc++;
2398 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH,
2399 IEEE80211_REASON_NOT_ASSOCED);
2403 aid = le16toh(*(uint16_t *)wh->i_dur);
2404 if (aid != ni->ni_associd) {
2405 IEEE80211_DISCARD(vap,
2406 IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG,
2407 (struct ieee80211_frame *) wh, NULL,
2408 "aid mismatch: sta aid 0x%x poll aid 0x%x",
2409 ni->ni_associd, aid);
2410 vap->iv_stats.is_ps_badaid++;
2412 * NB: We used to deauth the station but it turns out
2413 * the Blackberry Curve 8230 (and perhaps other devices)
2414 * sometimes send the wrong AID when WME is negotiated.
2415 * Being more lenient here seems ok as we already check
2416 * the station is associated and we only return frames
2417 * queued for the station (i.e. we don't use the AID).
2422 /* Okay, take the first queued packet and put it out... */
2423 m = ieee80211_node_psq_dequeue(ni, &qlen);
2425 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_POWER, wh->i_addr2,
2426 "%s", "recv ps-poll, but queue empty");
2427 ieee80211_send_nulldata(ieee80211_ref_node(ni));
2428 vap->iv_stats.is_ps_qempty++; /* XXX node stat */
2429 if (vap->iv_set_tim != NULL)
2430 vap->iv_set_tim(ni, 0); /* just in case */
2434 * If there are more packets, set the more packets bit
2435 * in the packet dispatched to the station; otherwise
2436 * turn off the TIM bit.
2439 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
2440 "recv ps-poll, send packet, %u still queued", qlen);
2441 m->m_flags |= M_MORE_DATA;
2443 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
2444 "%s", "recv ps-poll, send packet, queue empty");
2445 if (vap->iv_set_tim != NULL)
2446 vap->iv_set_tim(ni, 0);
2448 m->m_flags |= M_PWR_SAV; /* bypass PS handling */
2451 * Do the right thing; if it's an encap'ed frame then
2452 * call ieee80211_parent_xmitpkt() else
2453 * call ieee80211_vap_xmitpkt().
2455 if (m->m_flags & M_ENCAP) {
2456 (void) ieee80211_parent_xmitpkt(ic, m);
2458 (void) ieee80211_vap_xmitpkt(vap, m);