xref: /freebsd/sys/net80211/ieee80211_hostap.c (revision 3332f1b444d4a73238e9f59cca27bfc95fe936bd)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3  *
4  * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
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.
15  *
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.
26  */
27 
28 #include <sys/cdefs.h>
29 #ifdef __FreeBSD__
30 __FBSDID("$FreeBSD$");
31 #endif
32 
33 /*
34  * IEEE 802.11 HOSTAP mode support.
35  */
36 #include "opt_inet.h"
37 #include "opt_wlan.h"
38 
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/mbuf.h>
42 #include <sys/malloc.h>
43 #include <sys/kernel.h>
44 
45 #include <sys/socket.h>
46 #include <sys/sockio.h>
47 #include <sys/endian.h>
48 #include <sys/errno.h>
49 #include <sys/proc.h>
50 #include <sys/sysctl.h>
51 
52 #include <net/if.h>
53 #include <net/if_var.h>
54 #include <net/if_media.h>
55 #include <net/if_llc.h>
56 #include <net/ethernet.h>
57 
58 #include <net/bpf.h>
59 
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>
65 #endif
66 #include <net80211/ieee80211_wds.h>
67 #include <net80211/ieee80211_vht.h>
68 #include <net80211/ieee80211_sta.h> /* for parse_wmeie */
69 
70 #define	IEEE80211_RATE2MBS(r)	(((r) & IEEE80211_RATE_VAL) / 2)
71 
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 *,
76 	    int rssi, int nf);
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);
82 
83 void
84 ieee80211_hostap_attach(struct ieee80211com *ic)
85 {
86 	ic->ic_vattach[IEEE80211_M_HOSTAP] = hostap_vattach;
87 }
88 
89 void
90 ieee80211_hostap_detach(struct ieee80211com *ic)
91 {
92 }
93 
94 static void
95 hostap_vdetach(struct ieee80211vap *vap)
96 {
97 }
98 
99 static void
100 hostap_vattach(struct ieee80211vap *vap)
101 {
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;
109 }
110 
111 static void
112 sta_disassoc(void *arg, struct ieee80211_node *ni)
113 {
114 
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);
119 	}
120 }
121 
122 static void
123 sta_csa(void *arg, struct ieee80211_node *ni)
124 {
125 	struct ieee80211vap *vap = ni->ni_vap;
126 
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);
132 		}
133 }
134 
135 static void
136 sta_drop(void *arg, struct ieee80211_node *ni)
137 {
138 
139 	if (ni->ni_associd != 0)
140 		ieee80211_node_leave(ni);
141 }
142 
143 /*
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).
147  */
148 static int
149 isbandchange(struct ieee80211com *ic)
150 {
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;
154 }
155 
156 /*
157  * IEEE80211_M_HOSTAP vap state machine handler.
158  */
159 static int
160 hostap_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
161 {
162 	struct ieee80211com *ic = vap->iv_ic;
163 	enum ieee80211_state ostate;
164 
165 	IEEE80211_LOCK_ASSERT(ic);
166 
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 */
174 	switch (nstate) {
175 	case IEEE80211_S_INIT:
176 		switch (ostate) {
177 		case IEEE80211_S_SCAN:
178 			ieee80211_cancel_scan(vap);
179 			break;
180 		case IEEE80211_S_CAC:
181 			ieee80211_dfs_cac_stop(vap);
182 			break;
183 		case IEEE80211_S_RUN:
184 			ieee80211_iterate_nodes_vap(&ic->ic_sta, vap,
185 			    sta_disassoc, NULL);
186 			break;
187 		default:
188 			break;
189 		}
190 		if (ostate != IEEE80211_S_INIT) {
191 			/* NB: optimize INIT -> INIT case */
192 			ieee80211_reset_bss(vap);
193 		}
194 		if (vap->iv_auth->ia_detach != NULL)
195 			vap->iv_auth->ia_detach(vap);
196 		break;
197 	case IEEE80211_S_SCAN:
198 		switch (ostate) {
199 		case IEEE80211_S_CSA:
200 		case IEEE80211_S_RUN:
201 			ieee80211_iterate_nodes_vap(&ic->ic_sta, vap,
202 			    sta_disassoc, NULL);
203 			/*
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.
208 			 */
209 			vap->iv_flags_ext &= ~IEEE80211_FEXT_NONERP_PR;
210 			vap->iv_flags_ht &= ~IEEE80211_FHT_NONHT_PR;
211 			/* XXX TODO: schedule deferred update? */
212 			/* fall thru... */
213 		case IEEE80211_S_CAC:
214 			/*
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
218 			 */
219 			ieee80211_dfs_cac_stop(vap);
220 			/* fall thru... */
221 		case IEEE80211_S_INIT:
222 			if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
223 			    !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan)) {
224 				/*
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.
229 				 */
230 				ieee80211_create_ibss(vap, vap->iv_des_chan);
231 				break;
232 			}
233 			/*
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.
239 			 */
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;
248 			} else
249 				ieee80211_check_scan_current(vap);
250 			break;
251 		case IEEE80211_S_SCAN:
252 			/*
253 			 * A state change requires a reset; scan.
254 			 */
255 			ieee80211_check_scan_current(vap);
256 			break;
257 		default:
258 			break;
259 		}
260 		break;
261 	case IEEE80211_S_CAC:
262 		/*
263 		 * Start CAC on a DFS channel.  We come here when starting
264 		 * a bss on a DFS channel (see ieee80211_create_ibss).
265 		 */
266 		ieee80211_dfs_cac_start(vap);
267 		break;
268 	case IEEE80211_S_RUN:
269 		if (vap->iv_flags & IEEE80211_F_WPA) {
270 			/* XXX validate prerequisites */
271 		}
272 		switch (ostate) {
273 		case IEEE80211_S_INIT:
274 			/*
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.
279 			 */
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 */
284 			break;
285 		case IEEE80211_S_CAC:
286 			/*
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.
290 			 */
291 			/* fall thru... */
292 		case IEEE80211_S_CSA:
293 			/*
294 			 * Shorten inactivity timer of associated stations
295 			 * to weed out sta's that don't follow a CSA.
296 			 */
297 			ieee80211_iterate_nodes_vap(&ic->ic_sta, vap,
298 			    sta_csa, NULL);
299 			/*
300 			 * Update bss node channel to reflect where
301 			 * we landed after CSA.
302 			 */
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 */
307 			break;
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;
313 				ieee80211_note(vap,
314 				    "synchronized with %s ssid ",
315 				    ether_sprintf(ni->ni_bssid));
316 				ieee80211_print_essid(ni->ni_essid,
317 				    ni->ni_esslen);
318 				/* XXX MCS/HT */
319 				printf(" channel %d start %uMb\n",
320 				    ieee80211_chan2ieee(ic, ic->ic_curchan),
321 				    IEEE80211_RATE2MBS(ni->ni_txrate));
322 			}
323 #endif
324 			break;
325 		default:
326 			break;
327 		}
328 		/*
329 		 * Start/stop the authenticator.  We delay until here
330 		 * to allow configuration to happen out of order.
331 		 */
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);
337 		}
338 		ieee80211_node_authorize(vap->iv_bss);
339 		break;
340 	case IEEE80211_S_CSA:
341 		if (ostate == IEEE80211_S_RUN && isbandchange(ic)) {
342 			/*
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).
348 			 */
349 			ieee80211_iterate_nodes_vap(&ic->ic_sta, vap,
350 			    sta_drop, NULL);
351 		}
352 		break;
353 	default:
354 		break;
355 	}
356 	return 0;
357 }
358 
359 static void
360 hostap_deliver_data(struct ieee80211vap *vap,
361 	struct ieee80211_node *ni, struct mbuf *m)
362 {
363 	struct ether_header *eh = mtod(m, struct ether_header *);
364 	struct ifnet *ifp = vap->iv_ifp;
365 
366 	/* clear driver/net80211 flags before passing up */
367 	m->m_flags &= ~(M_MCAST | M_BCAST);
368 	m_clrprotoflags(m);
369 
370 	KASSERT(vap->iv_opmode == IEEE80211_M_HOSTAP,
371 	    ("gack, opmode %d", vap->iv_opmode));
372 	/*
373 	 * Do accounting.
374 	 */
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);
381 	} else
382 		IEEE80211_NODE_STAT(ni, rx_ucast);
383 
384 	/* perform as a bridge within the AP */
385 	if ((vap->iv_flags & IEEE80211_F_NOBRIDGE) == 0) {
386 		struct mbuf *mcopy = NULL;
387 
388 		if (m->m_flags & M_MCAST) {
389 			mcopy = m_dup(m, M_NOWAIT);
390 			if (mcopy == NULL)
391 				if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
392 			else
393 				mcopy->m_flags |= M_MCAST;
394 		} else {
395 			/*
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
400 			 * normally.
401 			 */
402 			struct ieee80211_node *sta = ieee80211_find_vap_node(
403 			     &vap->iv_ic->ic_sta, vap, eh->ether_dhost);
404 			if (sta != NULL) {
405 				if (ieee80211_node_is_authorized(sta)) {
406 					/*
407 					 * Beware of sending to ourself; this
408 					 * needs to happen via the normal
409 					 * input path.
410 					 */
411 					if (sta != vap->iv_bss) {
412 						mcopy = m;
413 						m = NULL;
414 					}
415 				} else {
416 					vap->iv_stats.is_rx_unauth++;
417 					IEEE80211_NODE_STAT(sta, rx_unauth);
418 				}
419 				ieee80211_free_node(sta);
420 			}
421 		}
422 		if (mcopy != NULL)
423 			(void) ieee80211_vap_xmitpkt(vap, mcopy);
424 	}
425 	if (m != NULL) {
426 		/*
427 		 * Mark frame as coming from vap's interface.
428 		 */
429 		m->m_pkthdr.rcvif = ifp;
430 		if (m->m_flags & M_MCAST) {
431 			/*
432 			 * Spam DWDS vap's w/ multicast traffic.
433 			 */
434 			/* XXX only if dwds in use? */
435 			ieee80211_dwds_mcast(vap, m);
436 		}
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;
441 		}
442 		ifp->if_input(ifp, m);
443 	}
444 }
445 
446 /*
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
450  * (e.g. beacons).
451  */
452 static __inline int
453 doprint(struct ieee80211vap *vap, int subtype)
454 {
455 	switch (subtype) {
456 	case IEEE80211_FC0_SUBTYPE_BEACON:
457 		return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN);
458 	case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
459 		return 0;
460 	}
461 	return 1;
462 }
463 
464 /*
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.
473  */
474 static int
475 hostap_input(struct ieee80211_node *ni, struct mbuf *m,
476     const struct ieee80211_rx_stats *rxs, int rssi, int nf)
477 {
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;
486 	uint8_t *bssid;
487 	int is_hw_decrypted = 0;
488 	int has_decrypted = 0;
489 
490 	/*
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.
494 	 */
495 	if ((rxs != NULL) && (rxs->c_pktflags & IEEE80211_RX_F_DECRYPTED))
496 		is_hw_decrypted = 1;
497 
498 	if (m->m_flags & M_AMPDU_MPDU) {
499 		/*
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.
506 		 */
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? */
512 		goto resubmit_ampdu;
513 	}
514 
515 	KASSERT(ni != NULL, ("null node"));
516 	ni->ni_inact = ni->ni_inact_reload;
517 
518 	type = -1;			/* undefined */
519 
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++;
525 		goto out;
526 	}
527 	/*
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
531 	 * present.
532 	 */
533 	wh = mtod(m, struct ieee80211_frame *);
534 
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++;
541 		goto err;
542 	}
543 
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)
549 			bssid = wh->i_addr1;
550 		else if (type == IEEE80211_FC0_TYPE_CTL)
551 			bssid = wh->i_addr1;
552 		else {
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",
557 				    m->m_pkthdr.len);
558 				vap->iv_stats.is_rx_tooshort++;
559 				goto out;
560 			}
561 			bssid = wh->i_addr3;
562 		}
563 		/*
564 		 * Validate the bssid.
565 		 */
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++;
574 			goto out;
575 		}
576 
577 		IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
578 		ni->ni_noise = nf;
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))
585 				goto out;
586 		}
587 	}
588 
589 	switch (type) {
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++;
598 			goto out;		/* XXX */
599 		}
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);
607 			} else {
608 				IEEE80211_DISCARD(vap,
609 				    IEEE80211_MSG_INPUT |
610 				    IEEE80211_MSG_WDS, wh,
611 				    "4-address data",
612 				    "%s", "DWDS not enabled");
613 			}
614 			vap->iv_stats.is_rx_wrongdir++;
615 			goto out;
616 		}
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++;
625 			goto err;
626 		}
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++;
634 			goto err;
635 		}
636 
637 		/*
638 		 * Check for power save state change.
639 		 * XXX out-of-order A-MPDU frames?
640 		 */
641 		if (((wh->i_fc[1] & IEEE80211_FC1_PWR_MGT) ^
642 		    (ni->ni_flags & IEEE80211_NODE_PWR_MGT)))
643 			vap->iv_node_ps(ni,
644 				wh->i_fc[1] & IEEE80211_FC1_PWR_MGT);
645 		/*
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).
649 		 */
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,
655 				    "4-address data",
656 				    "%s", "unauthorized port");
657 				vap->iv_stats.is_rx_unauth++;
658 				IEEE80211_NODE_STAT(ni, rx_unauth);
659 				goto err;
660 			}
661 			ieee80211_dwds_discover(ni, m);
662 			return type;
663 		}
664 
665 		/*
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.
670 		 */
671 		if ((m->m_flags & M_AMPDU) &&
672 		    ieee80211_ampdu_reorder(ni, m, rxs) != 0) {
673 			m = NULL;
674 			goto out;
675 		}
676 	resubmit_ampdu:
677 
678 		/*
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.
685 		 */
686 		if (is_hw_decrypted || wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
687 			if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
688 				/*
689 				 * Discard encrypted frames when privacy is off.
690 				 */
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);
695 				goto out;
696 			}
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);
700 				goto out;
701 			}
702 			wh = mtod(m, struct ieee80211_frame *);
703 			wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED;
704 			has_decrypted = 1;
705 		} else {
706 			/* XXX M_WEP and IEEE80211_F_PRIVACY */
707 			key = NULL;
708 		}
709 
710 		/*
711 		 * Save QoS bits for use below--before we strip the header.
712 		 */
713 		if (subtype == IEEE80211_FC0_SUBTYPE_QOS)
714 			qos = ieee80211_getqos(wh)[0];
715 		else
716 			qos = 0;
717 
718 		/*
719 		 * Next up, any fragmentation.
720 		 */
721 		if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
722 			m = ieee80211_defrag(ni, m, hdrspace, has_decrypted);
723 			if (m == NULL) {
724 				/* Fragment dropped or frame not complete yet */
725 				goto out;
726 			}
727 		}
728 		wh = NULL;		/* no longer valid, catch any uses */
729 
730 		/*
731 		 * Next strip any MSDU crypto bits.
732 		 */
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);
738 			goto out;
739 		}
740 		/* copy to listener after decrypt */
741 		if (ieee80211_radiotap_active_vap(vap))
742 			ieee80211_radiotap_rx(vap, m);
743 		need_tap = 0;
744 		/*
745 		 * Finally, strip the 802.11 header.
746 		 */
747 		m = ieee80211_decap(vap, m, hdrspace, qos);
748 		if (m == NULL) {
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)
753 				goto out;
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);
758 			goto err;
759 		}
760 		if (!(qos & IEEE80211_QOS_AMSDU))
761 			eh = mtod(m, struct ether_header *);
762 		else
763 			eh = NULL;
764 		if (!ieee80211_node_is_authorized(ni)) {
765 			/*
766 			 * Deny any non-PAE frames received prior to
767 			 * authorization.  For open/shared-key
768 			 * authentication the port is mark authorized
769 			 * after authentication completes.  For 802.1x
770 			 * the port is not marked authorized by the
771 			 * authenticator until the handshake has completed.
772 			 */
773 			if (eh == NULL ||
774 			    eh->ether_type != htons(ETHERTYPE_PAE)) {
775 				IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
776 				    ni->ni_macaddr, "data", "unauthorized or "
777 				    "unknown port: ether type 0x%x len %u",
778 				    eh == NULL ? -1 : eh->ether_type,
779 				    m->m_pkthdr.len);
780 				vap->iv_stats.is_rx_unauth++;
781 				IEEE80211_NODE_STAT(ni, rx_unauth);
782 				goto err;
783 			}
784 		} else {
785 			/*
786 			 * When denying unencrypted frames, discard
787 			 * any non-PAE frames received without encryption.
788 			 */
789 			if ((vap->iv_flags & IEEE80211_F_DROPUNENC) &&
790 			    ((has_decrypted == 0) && (m->m_flags & M_WEP) == 0) &&
791 			    (is_hw_decrypted == 0) &&
792 			    (eh == NULL ||
793 			     eh->ether_type != htons(ETHERTYPE_PAE))) {
794 				/*
795 				 * Drop unencrypted frames.
796 				 */
797 				vap->iv_stats.is_rx_unencrypted++;
798 				IEEE80211_NODE_STAT(ni, rx_unencrypted);
799 				goto out;
800 			}
801 		}
802 		/* XXX require HT? */
803 		if (qos & IEEE80211_QOS_AMSDU) {
804 			m = ieee80211_decap_amsdu(ni, m);
805 			if (m == NULL)
806 				return IEEE80211_FC0_TYPE_DATA;
807 		} else {
808 #ifdef IEEE80211_SUPPORT_SUPERG
809 			m = ieee80211_decap_fastframe(vap, ni, m);
810 			if (m == NULL)
811 				return IEEE80211_FC0_TYPE_DATA;
812 #endif
813 		}
814 		if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap != NULL)
815 			ieee80211_deliver_data(ni->ni_wdsvap, ni, m);
816 		else
817 			hostap_deliver_data(vap, ni, m);
818 		return IEEE80211_FC0_TYPE_DATA;
819 
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++;
827 			goto err;
828 		}
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",
832 			    m->m_pkthdr.len);
833 			vap->iv_stats.is_rx_tooshort++;
834 			goto out;
835 		}
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 */
842 			goto out;
843 		}
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 			    ether_sprintf(wh->i_addr2), rssi);
850 		}
851 #endif
852 		if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
853 			if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) {
854 				/*
855 				 * Only shared key auth frames with a challenge
856 				 * should be encrypted, discard all others.
857 				 */
858 				IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
859 				    wh, NULL,
860 				    "%s", "WEP set but not permitted");
861 				vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
862 				goto out;
863 			}
864 			if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
865 				/*
866 				 * Discard encrypted frames when privacy is off.
867 				 */
868 				IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
869 				    wh, NULL, "%s", "WEP set but PRIVACY off");
870 				vap->iv_stats.is_rx_noprivacy++;
871 				goto out;
872 			}
873 			hdrspace = ieee80211_hdrspace(ic, wh);
874 			if (ieee80211_crypto_decap(ni, m, hdrspace, &key) == 0) {
875 				/* NB: stats+msgs handled in crypto_decap */
876 				goto out;
877 			}
878 			wh = mtod(m, struct ieee80211_frame *);
879 			wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED;
880 			has_decrypted = 1;
881 		}
882 		/*
883 		 * Pass the packet to radiotap before calling iv_recv_mgmt().
884 		 * Otherwise iv_recv_mgmt() might pass another packet to
885 		 * radiotap, resulting in out of order packet captures.
886 		 */
887 		if (ieee80211_radiotap_active_vap(vap))
888 			ieee80211_radiotap_rx(vap, m);
889 		need_tap = 0;
890 		vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf);
891 		goto out;
892 
893 	case IEEE80211_FC0_TYPE_CTL:
894 		vap->iv_stats.is_rx_ctl++;
895 		IEEE80211_NODE_STAT(ni, rx_ctrl);
896 		vap->iv_recv_ctl(ni, m, subtype);
897 		goto out;
898 	default:
899 		IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
900 		    wh, "bad", "frame type 0x%x", type);
901 		/* should not come here */
902 		break;
903 	}
904 err:
905 	if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
906 out:
907 	if (m != NULL) {
908 		if (need_tap && ieee80211_radiotap_active_vap(vap))
909 			ieee80211_radiotap_rx(vap, m);
910 		m_freem(m);
911 	}
912 	return type;
913 }
914 
915 static void
916 hostap_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh,
917     int rssi, int nf, uint16_t seq, uint16_t status)
918 {
919 	struct ieee80211vap *vap = ni->ni_vap;
920 
921 	KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state));
922 
923 	if (ni->ni_authmode == IEEE80211_AUTH_SHARED) {
924 		IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
925 		    ni->ni_macaddr, "open auth",
926 		    "bad sta auth mode %u", ni->ni_authmode);
927 		vap->iv_stats.is_rx_bad_auth++;	/* XXX */
928 		/*
929 		 * Clear any challenge text that may be there if
930 		 * a previous shared key auth failed and then an
931 		 * open auth is attempted.
932 		 */
933 		if (ni->ni_challenge != NULL) {
934 			IEEE80211_FREE(ni->ni_challenge, M_80211_NODE);
935 			ni->ni_challenge = NULL;
936 		}
937 		/* XXX hack to workaround calling convention */
938 		ieee80211_send_error(ni, wh->i_addr2,
939 		    IEEE80211_FC0_SUBTYPE_AUTH,
940 		    (seq + 1) | (IEEE80211_STATUS_ALG<<16));
941 		return;
942 	}
943 	if (seq != IEEE80211_AUTH_OPEN_REQUEST) {
944 		vap->iv_stats.is_rx_bad_auth++;
945 		return;
946 	}
947 	/* always accept open authentication requests */
948 	if (ni == vap->iv_bss) {
949 		ni = ieee80211_dup_bss(vap, wh->i_addr2);
950 		if (ni == NULL)
951 			return;
952 	} else if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0)
953 		(void) ieee80211_ref_node(ni);
954 	/*
955 	 * Mark the node as referenced to reflect that it's
956 	 * reference count has been bumped to insure it remains
957 	 * after the transaction completes.
958 	 */
959 	ni->ni_flags |= IEEE80211_NODE_AREF;
960 	/*
961 	 * Mark the node as requiring a valid association id
962 	 * before outbound traffic is permitted.
963 	 */
964 	ni->ni_flags |= IEEE80211_NODE_ASSOCID;
965 
966 	if (vap->iv_acl != NULL &&
967 	    vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) {
968 		/*
969 		 * When the ACL policy is set to RADIUS we defer the
970 		 * authorization to a user agent.  Dispatch an event,
971 		 * a subsequent MLME call will decide the fate of the
972 		 * station.  If the user agent is not present then the
973 		 * node will be reclaimed due to inactivity.
974 		 */
975 		IEEE80211_NOTE_MAC(vap,
976 		    IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, ni->ni_macaddr,
977 		    "%s", "station authentication defered (radius acl)");
978 		ieee80211_notify_node_auth(ni);
979 	} else {
980 		IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1);
981 		IEEE80211_NOTE_MAC(vap,
982 		    IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni->ni_macaddr,
983 		    "%s", "station authenticated (open)");
984 		/*
985 		 * When 802.1x is not in use mark the port
986 		 * authorized at this point so traffic can flow.
987 		 */
988 		if (ni->ni_authmode != IEEE80211_AUTH_8021X)
989 			ieee80211_node_authorize(ni);
990 	}
991 }
992 
993 static void
994 hostap_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh,
995     uint8_t *frm, uint8_t *efrm, int rssi, int nf,
996     uint16_t seq, uint16_t status)
997 {
998 	struct ieee80211vap *vap = ni->ni_vap;
999 	uint8_t *challenge;
1000 	int allocbs, estatus;
1001 
1002 	KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state));
1003 
1004 	/*
1005 	 * NB: this can happen as we allow pre-shared key
1006 	 * authentication to be enabled w/o wep being turned
1007 	 * on so that configuration of these can be done
1008 	 * in any order.  It may be better to enforce the
1009 	 * ordering in which case this check would just be
1010 	 * for sanity/consistency.
1011 	 */
1012 	if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
1013 		IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1014 		    ni->ni_macaddr, "shared key auth",
1015 		    "%s", " PRIVACY is disabled");
1016 		estatus = IEEE80211_STATUS_ALG;
1017 		goto bad;
1018 	}
1019 	/*
1020 	 * Pre-shared key authentication is evil; accept
1021 	 * it only if explicitly configured (it is supported
1022 	 * mainly for compatibility with clients like Mac OS X).
1023 	 */
1024 	if (ni->ni_authmode != IEEE80211_AUTH_AUTO &&
1025 	    ni->ni_authmode != IEEE80211_AUTH_SHARED) {
1026 		IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1027 		    ni->ni_macaddr, "shared key auth",
1028 		    "bad sta auth mode %u", ni->ni_authmode);
1029 		vap->iv_stats.is_rx_bad_auth++;	/* XXX maybe a unique error? */
1030 		estatus = IEEE80211_STATUS_ALG;
1031 		goto bad;
1032 	}
1033 
1034 	challenge = NULL;
1035 	if (frm + 1 < efrm) {
1036 		if ((frm[1] + 2) > (efrm - frm)) {
1037 			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1038 			    ni->ni_macaddr, "shared key auth",
1039 			    "ie %d/%d too long",
1040 			    frm[0], (frm[1] + 2) - (efrm - frm));
1041 			vap->iv_stats.is_rx_bad_auth++;
1042 			estatus = IEEE80211_STATUS_CHALLENGE;
1043 			goto bad;
1044 		}
1045 		if (*frm == IEEE80211_ELEMID_CHALLENGE)
1046 			challenge = frm;
1047 		frm += frm[1] + 2;
1048 	}
1049 	switch (seq) {
1050 	case IEEE80211_AUTH_SHARED_CHALLENGE:
1051 	case IEEE80211_AUTH_SHARED_RESPONSE:
1052 		if (challenge == NULL) {
1053 			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1054 			    ni->ni_macaddr, "shared key auth",
1055 			    "%s", "no challenge");
1056 			vap->iv_stats.is_rx_bad_auth++;
1057 			estatus = IEEE80211_STATUS_CHALLENGE;
1058 			goto bad;
1059 		}
1060 		if (challenge[1] != IEEE80211_CHALLENGE_LEN) {
1061 			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1062 			    ni->ni_macaddr, "shared key auth",
1063 			    "bad challenge len %d", challenge[1]);
1064 			vap->iv_stats.is_rx_bad_auth++;
1065 			estatus = IEEE80211_STATUS_CHALLENGE;
1066 			goto bad;
1067 		}
1068 	default:
1069 		break;
1070 	}
1071 	switch (seq) {
1072 	case IEEE80211_AUTH_SHARED_REQUEST:
1073 		if (ni == vap->iv_bss) {
1074 			ni = ieee80211_dup_bss(vap, wh->i_addr2);
1075 			if (ni == NULL) {
1076 				/* NB: no way to return an error */
1077 				return;
1078 			}
1079 			allocbs = 1;
1080 		} else {
1081 			if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0)
1082 				(void) ieee80211_ref_node(ni);
1083 			allocbs = 0;
1084 		}
1085 		/*
1086 		 * Mark the node as referenced to reflect that it's
1087 		 * reference count has been bumped to insure it remains
1088 		 * after the transaction completes.
1089 		 */
1090 		ni->ni_flags |= IEEE80211_NODE_AREF;
1091 		/*
1092 		 * Mark the node as requiring a valid association id
1093 		 * before outbound traffic is permitted.
1094 		 */
1095 		ni->ni_flags |= IEEE80211_NODE_ASSOCID;
1096 		IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1097 		ni->ni_noise = nf;
1098 		if (!ieee80211_alloc_challenge(ni)) {
1099 			/* NB: don't return error so they rexmit */
1100 			return;
1101 		}
1102 		net80211_get_random_bytes(ni->ni_challenge,
1103 			IEEE80211_CHALLENGE_LEN);
1104 		IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH,
1105 		    ni, "shared key %sauth request", allocbs ? "" : "re");
1106 		/*
1107 		 * When the ACL policy is set to RADIUS we defer the
1108 		 * authorization to a user agent.  Dispatch an event,
1109 		 * a subsequent MLME call will decide the fate of the
1110 		 * station.  If the user agent is not present then the
1111 		 * node will be reclaimed due to inactivity.
1112 		 */
1113 		if (vap->iv_acl != NULL &&
1114 		    vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) {
1115 			IEEE80211_NOTE_MAC(vap,
1116 			    IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL,
1117 			    ni->ni_macaddr,
1118 			    "%s", "station authentication defered (radius acl)");
1119 			ieee80211_notify_node_auth(ni);
1120 			return;
1121 		}
1122 		break;
1123 	case IEEE80211_AUTH_SHARED_RESPONSE:
1124 		if (ni == vap->iv_bss) {
1125 			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1126 			    ni->ni_macaddr, "shared key response",
1127 			    "%s", "unknown station");
1128 			/* NB: don't send a response */
1129 			return;
1130 		}
1131 		if (ni->ni_challenge == NULL) {
1132 			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1133 			    ni->ni_macaddr, "shared key response",
1134 			    "%s", "no challenge recorded");
1135 			vap->iv_stats.is_rx_bad_auth++;
1136 			estatus = IEEE80211_STATUS_CHALLENGE;
1137 			goto bad;
1138 		}
1139 		if (memcmp(ni->ni_challenge, &challenge[2],
1140 			   challenge[1]) != 0) {
1141 			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1142 			    ni->ni_macaddr, "shared key response",
1143 			    "%s", "challenge mismatch");
1144 			vap->iv_stats.is_rx_auth_fail++;
1145 			estatus = IEEE80211_STATUS_CHALLENGE;
1146 			goto bad;
1147 		}
1148 		IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH,
1149 		    ni, "%s", "station authenticated (shared key)");
1150 		ieee80211_node_authorize(ni);
1151 		break;
1152 	default:
1153 		IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1154 		    ni->ni_macaddr, "shared key auth",
1155 		    "bad seq %d", seq);
1156 		vap->iv_stats.is_rx_bad_auth++;
1157 		estatus = IEEE80211_STATUS_SEQUENCE;
1158 		goto bad;
1159 	}
1160 	IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1);
1161 	return;
1162 bad:
1163 	/*
1164 	 * Send an error response; but only when operating as an AP.
1165 	 */
1166 	/* XXX hack to workaround calling convention */
1167 	ieee80211_send_error(ni, wh->i_addr2,
1168 	    IEEE80211_FC0_SUBTYPE_AUTH,
1169 	    (seq + 1) | (estatus<<16));
1170 }
1171 
1172 /*
1173  * Convert a WPA cipher selector OUI to an internal
1174  * cipher algorithm.  Where appropriate we also
1175  * record any key length.
1176  */
1177 static int
1178 wpa_cipher(const uint8_t *sel, uint8_t *keylen, uint8_t *cipher)
1179 {
1180 #define	WPA_SEL(x)	(((x)<<24)|WPA_OUI)
1181 	uint32_t w = le32dec(sel);
1182 
1183 	switch (w) {
1184 	case WPA_SEL(WPA_CSE_NULL):
1185 		*cipher = IEEE80211_CIPHER_NONE;
1186 		break;
1187 	case WPA_SEL(WPA_CSE_WEP40):
1188 		if (keylen)
1189 			*keylen = 40 / NBBY;
1190 		*cipher = IEEE80211_CIPHER_WEP;
1191 		break;
1192 	case WPA_SEL(WPA_CSE_WEP104):
1193 		if (keylen)
1194 			*keylen = 104 / NBBY;
1195 		*cipher = IEEE80211_CIPHER_WEP;
1196 		break;
1197 	case WPA_SEL(WPA_CSE_TKIP):
1198 		*cipher = IEEE80211_CIPHER_TKIP;
1199 		break;
1200 	case WPA_SEL(WPA_CSE_CCMP):
1201 		*cipher = IEEE80211_CIPHER_AES_CCM;
1202 		break;
1203 	default:
1204 		return (EINVAL);
1205 	}
1206 
1207 	return (0);
1208 #undef WPA_SEL
1209 }
1210 
1211 /*
1212  * Convert a WPA key management/authentication algorithm
1213  * to an internal code.
1214  */
1215 static int
1216 wpa_keymgmt(const uint8_t *sel)
1217 {
1218 #define	WPA_SEL(x)	(((x)<<24)|WPA_OUI)
1219 	uint32_t w = le32dec(sel);
1220 
1221 	switch (w) {
1222 	case WPA_SEL(WPA_ASE_8021X_UNSPEC):
1223 		return WPA_ASE_8021X_UNSPEC;
1224 	case WPA_SEL(WPA_ASE_8021X_PSK):
1225 		return WPA_ASE_8021X_PSK;
1226 	case WPA_SEL(WPA_ASE_NONE):
1227 		return WPA_ASE_NONE;
1228 	}
1229 	return 0;		/* NB: so is discarded */
1230 #undef WPA_SEL
1231 }
1232 
1233 /*
1234  * Parse a WPA information element to collect parameters.
1235  * Note that we do not validate security parameters; that
1236  * is handled by the authenticator; the parsing done here
1237  * is just for internal use in making operational decisions.
1238  */
1239 static int
1240 ieee80211_parse_wpa(struct ieee80211vap *vap, const uint8_t *frm,
1241 	struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh)
1242 {
1243 	uint8_t len = frm[1];
1244 	uint32_t w;
1245 	int error, n;
1246 
1247 	/*
1248 	 * Check the length once for fixed parts: OUI, type,
1249 	 * version, mcast cipher, and 2 selector counts.
1250 	 * Other, variable-length data, must be checked separately.
1251 	 */
1252 	if ((vap->iv_flags & IEEE80211_F_WPA1) == 0) {
1253 		IEEE80211_DISCARD_IE(vap,
1254 		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1255 		    wh, "WPA", "not WPA, flags 0x%x", vap->iv_flags);
1256 		return IEEE80211_REASON_IE_INVALID;
1257 	}
1258 	if (len < 14) {
1259 		IEEE80211_DISCARD_IE(vap,
1260 		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1261 		    wh, "WPA", "too short, len %u", len);
1262 		return IEEE80211_REASON_IE_INVALID;
1263 	}
1264 	frm += 6, len -= 4;		/* NB: len is payload only */
1265 	/* NB: iswpaoui already validated the OUI and type */
1266 	w = le16dec(frm);
1267 	if (w != WPA_VERSION) {
1268 		IEEE80211_DISCARD_IE(vap,
1269 		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1270 		    wh, "WPA", "bad version %u", w);
1271 		return IEEE80211_REASON_IE_INVALID;
1272 	}
1273 	frm += 2, len -= 2;
1274 
1275 	memset(rsn, 0, sizeof(*rsn));
1276 
1277 	/* multicast/group cipher */
1278 	error = wpa_cipher(frm, &rsn->rsn_mcastkeylen, &rsn->rsn_mcastcipher);
1279 	if (error != 0) {
1280 		IEEE80211_DISCARD_IE(vap,
1281 		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1282 		    wh, "WPA", "unknown mcast cipher suite %08X",
1283 		    le32dec(frm));
1284 		return IEEE80211_REASON_GROUP_CIPHER_INVALID;
1285 	}
1286 	frm += 4, len -= 4;
1287 
1288 	/* unicast ciphers */
1289 	n = le16dec(frm);
1290 	frm += 2, len -= 2;
1291 	if (len < n*4+2) {
1292 		IEEE80211_DISCARD_IE(vap,
1293 		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1294 		    wh, "WPA", "ucast cipher data too short; len %u, n %u",
1295 		    len, n);
1296 		return IEEE80211_REASON_IE_INVALID;
1297 	}
1298 	w = 0;
1299 	for (; n > 0; n--) {
1300 		uint8_t cipher;
1301 
1302 		error = wpa_cipher(frm, &rsn->rsn_ucastkeylen, &cipher);
1303 		if (error == 0)
1304 			w |= 1 << cipher;
1305 
1306 		frm += 4, len -= 4;
1307 	}
1308 	if (w == 0) {
1309 		IEEE80211_DISCARD_IE(vap,
1310 		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1311 		    wh, "WPA", "no usable pairwise cipher suite found (w=%d)",
1312 		    w);
1313 		return IEEE80211_REASON_PAIRWISE_CIPHER_INVALID;
1314 	}
1315 	/* XXX other? */
1316 	if (w & (1 << IEEE80211_CIPHER_AES_CCM))
1317 		rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM;
1318 	else
1319 		rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP;
1320 
1321 	/* key management algorithms */
1322 	n = le16dec(frm);
1323 	frm += 2, len -= 2;
1324 	if (len < n*4) {
1325 		IEEE80211_DISCARD_IE(vap,
1326 		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1327 		    wh, "WPA", "key mgmt alg data too short; len %u, n %u",
1328 		    len, n);
1329 		return IEEE80211_REASON_IE_INVALID;
1330 	}
1331 	w = 0;
1332 	for (; n > 0; n--) {
1333 		w |= wpa_keymgmt(frm);
1334 		frm += 4, len -= 4;
1335 	}
1336 	if (w & WPA_ASE_8021X_UNSPEC)
1337 		rsn->rsn_keymgmt = WPA_ASE_8021X_UNSPEC;
1338 	else
1339 		rsn->rsn_keymgmt = WPA_ASE_8021X_PSK;
1340 
1341 	if (len > 2)		/* optional capabilities */
1342 		rsn->rsn_caps = le16dec(frm);
1343 
1344 	return 0;
1345 }
1346 
1347 /*
1348  * Convert an RSN cipher selector OUI to an internal
1349  * cipher algorithm.  Where appropriate we also
1350  * record any key length.
1351  */
1352 static int
1353 rsn_cipher(const uint8_t *sel, uint8_t *keylen, uint8_t *cipher)
1354 {
1355 #define	RSN_SEL(x)	(((x)<<24)|RSN_OUI)
1356 	uint32_t w = le32dec(sel);
1357 
1358 	switch (w) {
1359 	case RSN_SEL(RSN_CSE_NULL):
1360 		*cipher = IEEE80211_CIPHER_NONE;
1361 		break;
1362 	case RSN_SEL(RSN_CSE_WEP40):
1363 		if (keylen)
1364 			*keylen = 40 / NBBY;
1365 		*cipher = IEEE80211_CIPHER_WEP;
1366 		break;
1367 	case RSN_SEL(RSN_CSE_WEP104):
1368 		if (keylen)
1369 			*keylen = 104 / NBBY;
1370 		*cipher = IEEE80211_CIPHER_WEP;
1371 		break;
1372 	case RSN_SEL(RSN_CSE_TKIP):
1373 		*cipher = IEEE80211_CIPHER_TKIP;
1374 		break;
1375 	case RSN_SEL(RSN_CSE_CCMP):
1376 		*cipher = IEEE80211_CIPHER_AES_CCM;
1377 		break;
1378 	case RSN_SEL(RSN_CSE_WRAP):
1379 		*cipher = IEEE80211_CIPHER_AES_OCB;
1380 		break;
1381 	default:
1382 		return (EINVAL);
1383 	}
1384 
1385 	return (0);
1386 #undef WPA_SEL
1387 }
1388 
1389 /*
1390  * Convert an RSN key management/authentication algorithm
1391  * to an internal code.
1392  */
1393 static int
1394 rsn_keymgmt(const uint8_t *sel)
1395 {
1396 #define	RSN_SEL(x)	(((x)<<24)|RSN_OUI)
1397 	uint32_t w = le32dec(sel);
1398 
1399 	switch (w) {
1400 	case RSN_SEL(RSN_ASE_8021X_UNSPEC):
1401 		return RSN_ASE_8021X_UNSPEC;
1402 	case RSN_SEL(RSN_ASE_8021X_PSK):
1403 		return RSN_ASE_8021X_PSK;
1404 	case RSN_SEL(RSN_ASE_NONE):
1405 		return RSN_ASE_NONE;
1406 	}
1407 	return 0;		/* NB: so is discarded */
1408 #undef RSN_SEL
1409 }
1410 
1411 /*
1412  * Parse a WPA/RSN information element to collect parameters
1413  * and validate the parameters against what has been
1414  * configured for the system.
1415  */
1416 static int
1417 ieee80211_parse_rsn(struct ieee80211vap *vap, const uint8_t *frm,
1418 	struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh)
1419 {
1420 	uint8_t len = frm[1];
1421 	uint32_t w;
1422 	int error, n;
1423 
1424 	/*
1425 	 * Check the length once for fixed parts:
1426 	 * version, mcast cipher, and 2 selector counts.
1427 	 * Other, variable-length data, must be checked separately.
1428 	 */
1429 	if ((vap->iv_flags & IEEE80211_F_WPA2) == 0) {
1430 		IEEE80211_DISCARD_IE(vap,
1431 		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1432 		    wh, "WPA", "not RSN, flags 0x%x", vap->iv_flags);
1433 		return IEEE80211_REASON_IE_INVALID;
1434 	}
1435 	/* XXX may be shorter */
1436 	if (len < 10) {
1437 		IEEE80211_DISCARD_IE(vap,
1438 		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1439 		    wh, "RSN", "too short, len %u", len);
1440 		return IEEE80211_REASON_IE_INVALID;
1441 	}
1442 	frm += 2;
1443 	w = le16dec(frm);
1444 	if (w != RSN_VERSION) {
1445 		IEEE80211_DISCARD_IE(vap,
1446 		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1447 		    wh, "RSN", "bad version %u", w);
1448 		return IEEE80211_REASON_UNSUPP_RSN_IE_VERSION;
1449 	}
1450 	frm += 2, len -= 2;
1451 
1452 	memset(rsn, 0, sizeof(*rsn));
1453 
1454 	/* multicast/group cipher */
1455 	error = rsn_cipher(frm, &rsn->rsn_mcastkeylen, &rsn->rsn_mcastcipher);
1456 	if (error != 0) {
1457 		IEEE80211_DISCARD_IE(vap,
1458 		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1459 		    wh, "RSN", "unknown mcast cipher suite %08X",
1460 		    le32dec(frm));
1461 		return IEEE80211_REASON_GROUP_CIPHER_INVALID;
1462 	}
1463 	if (rsn->rsn_mcastcipher == IEEE80211_CIPHER_NONE) {
1464 		IEEE80211_DISCARD_IE(vap,
1465 		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1466 		    wh, "RSN", "invalid mcast cipher suite %d",
1467 		    rsn->rsn_mcastcipher);
1468 		return IEEE80211_REASON_GROUP_CIPHER_INVALID;
1469 	}
1470 	frm += 4, len -= 4;
1471 
1472 	/* unicast ciphers */
1473 	n = le16dec(frm);
1474 	frm += 2, len -= 2;
1475 	if (len < n*4+2) {
1476 		IEEE80211_DISCARD_IE(vap,
1477 		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1478 		    wh, "RSN", "ucast cipher data too short; len %u, n %u",
1479 		    len, n);
1480 		return IEEE80211_REASON_IE_INVALID;
1481 	}
1482 	w = 0;
1483 
1484 	for (; n > 0; n--) {
1485 		uint8_t cipher;
1486 
1487 		error = rsn_cipher(frm, &rsn->rsn_ucastkeylen, &cipher);
1488 		if (error == 0)
1489 			w |= 1 << cipher;
1490 
1491 		frm += 4, len -= 4;
1492 	}
1493         if (w & (1 << IEEE80211_CIPHER_AES_CCM))
1494                 rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM;
1495 	else if (w & (1 << IEEE80211_CIPHER_AES_OCB))
1496 		rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_OCB;
1497 	else if (w & (1 << IEEE80211_CIPHER_TKIP))
1498 		rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP;
1499 	else if ((w & (1 << IEEE80211_CIPHER_NONE)) &&
1500 	    (rsn->rsn_mcastcipher == IEEE80211_CIPHER_WEP ||
1501 	     rsn->rsn_mcastcipher == IEEE80211_CIPHER_TKIP))
1502 		rsn->rsn_ucastcipher = IEEE80211_CIPHER_NONE;
1503 	else {
1504 		IEEE80211_DISCARD_IE(vap,
1505 		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1506 		    wh, "RSN", "no usable pairwise cipher suite found (w=%d)",
1507 		    w);
1508 		return IEEE80211_REASON_PAIRWISE_CIPHER_INVALID;
1509 	}
1510 
1511 	/* key management algorithms */
1512 	n = le16dec(frm);
1513 	frm += 2, len -= 2;
1514 	if (len < n*4) {
1515 		IEEE80211_DISCARD_IE(vap,
1516 		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1517 		    wh, "RSN", "key mgmt alg data too short; len %u, n %u",
1518 		    len, n);
1519 		return IEEE80211_REASON_IE_INVALID;
1520 	}
1521 	w = 0;
1522 	for (; n > 0; n--) {
1523 		w |= rsn_keymgmt(frm);
1524 		frm += 4, len -= 4;
1525 	}
1526 	if (w & RSN_ASE_8021X_UNSPEC)
1527 		rsn->rsn_keymgmt = RSN_ASE_8021X_UNSPEC;
1528 	else
1529 		rsn->rsn_keymgmt = RSN_ASE_8021X_PSK;
1530 
1531 	/* optional RSN capabilities */
1532 	if (len > 2)
1533 		rsn->rsn_caps = le16dec(frm);
1534 	/* XXXPMKID */
1535 
1536 	return 0;
1537 }
1538 
1539 /*
1540  * WPA/802.11i association request processing.
1541  */
1542 static int
1543 wpa_assocreq(struct ieee80211_node *ni, struct ieee80211_rsnparms *rsnparms,
1544 	const struct ieee80211_frame *wh, const uint8_t *wpa,
1545 	const uint8_t *rsn, uint16_t capinfo)
1546 {
1547 	struct ieee80211vap *vap = ni->ni_vap;
1548 	uint8_t reason;
1549 	int badwparsn;
1550 
1551 	ni->ni_flags &= ~(IEEE80211_NODE_WPS|IEEE80211_NODE_TSN);
1552 	if (wpa == NULL && rsn == NULL) {
1553 		if (vap->iv_flags_ext & IEEE80211_FEXT_WPS) {
1554 			/*
1555 			 * W-Fi Protected Setup (WPS) permits
1556 			 * clients to associate and pass EAPOL frames
1557 			 * to establish initial credentials.
1558 			 */
1559 			ni->ni_flags |= IEEE80211_NODE_WPS;
1560 			return 1;
1561 		}
1562 		if ((vap->iv_flags_ext & IEEE80211_FEXT_TSN) &&
1563 		    (capinfo & IEEE80211_CAPINFO_PRIVACY)) {
1564 			/*
1565 			 * Transitional Security Network.  Permits clients
1566 			 * to associate and use WEP while WPA is configured.
1567 			 */
1568 			ni->ni_flags |= IEEE80211_NODE_TSN;
1569 			return 1;
1570 		}
1571 		IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA,
1572 		    wh, NULL, "%s", "no WPA/RSN IE in association request");
1573 		vap->iv_stats.is_rx_assoc_badwpaie++;
1574 		reason = IEEE80211_REASON_IE_INVALID;
1575 		goto bad;
1576 	}
1577 	/* assert right association security credentials */
1578 	badwparsn = 0;			/* NB: to silence compiler */
1579 	switch (vap->iv_flags & IEEE80211_F_WPA) {
1580 	case IEEE80211_F_WPA1:
1581 		badwparsn = (wpa == NULL);
1582 		break;
1583 	case IEEE80211_F_WPA2:
1584 		badwparsn = (rsn == NULL);
1585 		break;
1586 	case IEEE80211_F_WPA1|IEEE80211_F_WPA2:
1587 		badwparsn = (wpa == NULL && rsn == NULL);
1588 		break;
1589 	}
1590 	if (badwparsn) {
1591 		IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA,
1592 		    wh, NULL,
1593 		    "%s", "missing WPA/RSN IE in association request");
1594 		vap->iv_stats.is_rx_assoc_badwpaie++;
1595 		reason = IEEE80211_REASON_IE_INVALID;
1596 		goto bad;
1597 	}
1598 	/*
1599 	 * Parse WPA/RSN information element.
1600 	 */
1601 	if (wpa != NULL)
1602 		reason = ieee80211_parse_wpa(vap, wpa, rsnparms, wh);
1603 	else
1604 		reason = ieee80211_parse_rsn(vap, rsn, rsnparms, wh);
1605 	if (reason != 0) {
1606 		/* XXX wpa->rsn fallback? */
1607 		/* XXX distinguish WPA/RSN? */
1608 		vap->iv_stats.is_rx_assoc_badwpaie++;
1609 		goto bad;
1610 	}
1611 	IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, ni,
1612 	    "%s ie: mc %u/%u uc %u/%u key %u caps 0x%x",
1613 	    wpa != NULL ? "WPA" : "RSN",
1614 	    rsnparms->rsn_mcastcipher, rsnparms->rsn_mcastkeylen,
1615 	    rsnparms->rsn_ucastcipher, rsnparms->rsn_ucastkeylen,
1616 	    rsnparms->rsn_keymgmt, rsnparms->rsn_caps);
1617 
1618 	return 1;
1619 bad:
1620 	ieee80211_node_deauth(ni, reason);
1621 	return 0;
1622 }
1623 
1624 /* XXX find a better place for definition */
1625 struct l2_update_frame {
1626 	struct ether_header eh;
1627 	uint8_t dsap;
1628 	uint8_t ssap;
1629 	uint8_t control;
1630 	uint8_t xid[3];
1631 }  __packed;
1632 
1633 /*
1634  * Deliver a TGf L2UF frame on behalf of a station.
1635  * This primes any bridge when the station is roaming
1636  * between ap's on the same wired network.
1637  */
1638 static void
1639 ieee80211_deliver_l2uf(struct ieee80211_node *ni)
1640 {
1641 	struct ieee80211vap *vap = ni->ni_vap;
1642 	struct ifnet *ifp = vap->iv_ifp;
1643 	struct mbuf *m;
1644 	struct l2_update_frame *l2uf;
1645 	struct ether_header *eh;
1646 
1647 	m = m_gethdr(M_NOWAIT, MT_DATA);
1648 	if (m == NULL) {
1649 		IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
1650 		    "%s", "no mbuf for l2uf frame");
1651 		vap->iv_stats.is_rx_nobuf++;	/* XXX not right */
1652 		return;
1653 	}
1654 	l2uf = mtod(m, struct l2_update_frame *);
1655 	eh = &l2uf->eh;
1656 	/* dst: Broadcast address */
1657 	IEEE80211_ADDR_COPY(eh->ether_dhost, ifp->if_broadcastaddr);
1658 	/* src: associated STA */
1659 	IEEE80211_ADDR_COPY(eh->ether_shost, ni->ni_macaddr);
1660 	eh->ether_type = htons(sizeof(*l2uf) - sizeof(*eh));
1661 
1662 	l2uf->dsap = 0;
1663 	l2uf->ssap = 0;
1664 	l2uf->control = 0xf5;
1665 	l2uf->xid[0] = 0x81;
1666 	l2uf->xid[1] = 0x80;
1667 	l2uf->xid[2] = 0x00;
1668 
1669 	m->m_pkthdr.len = m->m_len = sizeof(*l2uf);
1670 	hostap_deliver_data(vap, ni, m);
1671 }
1672 
1673 static void
1674 ratesetmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1675 	int reassoc, int resp, const char *tag, int rate)
1676 {
1677 	IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2,
1678 	    "deny %s request, %s rate set mismatch, rate/MCS %d",
1679 	    reassoc ? "reassoc" : "assoc", tag, rate & IEEE80211_RATE_VAL);
1680 	IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_BASIC_RATE);
1681 	ieee80211_node_leave(ni);
1682 }
1683 
1684 static void
1685 capinfomismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1686 	int reassoc, int resp, const char *tag, int capinfo)
1687 {
1688 	struct ieee80211vap *vap = ni->ni_vap;
1689 
1690 	IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2,
1691 	    "deny %s request, %s mismatch 0x%x",
1692 	    reassoc ? "reassoc" : "assoc", tag, capinfo);
1693 	IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_CAPINFO);
1694 	ieee80211_node_leave(ni);
1695 	vap->iv_stats.is_rx_assoc_capmismatch++;
1696 }
1697 
1698 static void
1699 htcapmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1700 	int reassoc, int resp)
1701 {
1702 	IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2,
1703 	    "deny %s request, %s missing HT ie", reassoc ? "reassoc" : "assoc");
1704 	/* XXX no better code */
1705 	IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_MISSING_HT_CAPS);
1706 	ieee80211_node_leave(ni);
1707 }
1708 
1709 static void
1710 authalgreject(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1711 	int algo, int seq, int status)
1712 {
1713 	struct ieee80211vap *vap = ni->ni_vap;
1714 
1715 	IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1716 	    wh, NULL, "unsupported alg %d", algo);
1717 	vap->iv_stats.is_rx_auth_unsupported++;
1718 	ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_AUTH,
1719 	    seq | (status << 16));
1720 }
1721 
1722 static __inline int
1723 ishtmixed(const uint8_t *ie)
1724 {
1725 	const struct ieee80211_ie_htinfo *ht =
1726 	    (const struct ieee80211_ie_htinfo *) ie;
1727 	return (ht->hi_byte2 & IEEE80211_HTINFO_OPMODE) ==
1728 	    IEEE80211_HTINFO_OPMODE_MIXED;
1729 }
1730 
1731 static int
1732 is11bclient(const uint8_t *rates, const uint8_t *xrates)
1733 {
1734 	static const uint32_t brates = (1<<2*1)|(1<<2*2)|(1<<11)|(1<<2*11);
1735 	int i;
1736 
1737 	/* NB: the 11b clients we care about will not have xrates */
1738 	if (xrates != NULL || rates == NULL)
1739 		return 0;
1740 	for (i = 0; i < rates[1]; i++) {
1741 		int r = rates[2+i] & IEEE80211_RATE_VAL;
1742 		if (r > 2*11 || ((1<<r) & brates) == 0)
1743 			return 0;
1744 	}
1745 	return 1;
1746 }
1747 
1748 static void
1749 hostap_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0,
1750 	int subtype, const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1751 {
1752 	struct ieee80211vap *vap = ni->ni_vap;
1753 	struct ieee80211com *ic = ni->ni_ic;
1754 	struct ieee80211_frame *wh;
1755 	uint8_t *frm, *efrm, *sfrm;
1756 	uint8_t *ssid, *rates, *xrates, *wpa, *rsn, *wme, *ath, *htcap;
1757 	uint8_t *vhtcap, *vhtinfo;
1758 	int reassoc, resp;
1759 	uint8_t rate;
1760 
1761 	wh = mtod(m0, struct ieee80211_frame *);
1762 	frm = (uint8_t *)&wh[1];
1763 	efrm = mtod(m0, uint8_t *) + m0->m_len;
1764 	switch (subtype) {
1765 	case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1766 		/*
1767 		 * We process beacon/probe response frames when scanning;
1768 		 * otherwise we check beacon frames for overlapping non-ERP
1769 		 * BSS in 11g and/or overlapping legacy BSS when in HT.
1770 		 */
1771 		if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1772 			vap->iv_stats.is_rx_mgtdiscard++;
1773 			return;
1774 		}
1775 		/* FALLTHROUGH */
1776 	case IEEE80211_FC0_SUBTYPE_BEACON: {
1777 		struct ieee80211_scanparams scan;
1778 
1779 		/* NB: accept off-channel frames */
1780 		/* XXX TODO: use rxstatus to determine off-channel details */
1781 		if (ieee80211_parse_beacon(ni, m0, ic->ic_curchan, &scan) &~ IEEE80211_BPARSE_OFFCHAN)
1782 			return;
1783 		/*
1784 		 * Count frame now that we know it's to be processed.
1785 		 */
1786 		if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1787 			vap->iv_stats.is_rx_beacon++;		/* XXX remove */
1788 			IEEE80211_NODE_STAT(ni, rx_beacons);
1789 		} else
1790 			IEEE80211_NODE_STAT(ni, rx_proberesp);
1791 		/*
1792 		 * If scanning, just pass information to the scan module.
1793 		 */
1794 		if (ic->ic_flags & IEEE80211_F_SCAN) {
1795 			if (scan.status == 0 &&		/* NB: on channel */
1796 			    (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN)) {
1797 				/*
1798 				 * Actively scanning a channel marked passive;
1799 				 * send a probe request now that we know there
1800 				 * is 802.11 traffic present.
1801 				 *
1802 				 * XXX check if the beacon we recv'd gives
1803 				 * us what we need and suppress the probe req
1804 				 */
1805 				ieee80211_probe_curchan(vap, 1);
1806 				ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1807 			}
1808 			ieee80211_add_scan(vap, ic->ic_curchan, &scan, wh,
1809 			    subtype, rssi, nf);
1810 			return;
1811 		}
1812 		/*
1813 		 * Check beacon for overlapping bss w/ non ERP stations.
1814 		 * If we detect one and protection is configured but not
1815 		 * enabled, enable it and start a timer that'll bring us
1816 		 * out if we stop seeing the bss.
1817 		 */
1818 		if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
1819 		    scan.status == 0 &&			/* NB: on-channel */
1820 		    ((scan.erp & 0x100) == 0 ||		/* NB: no ERP, 11b sta*/
1821 		     (scan.erp & IEEE80211_ERP_NON_ERP_PRESENT))) {
1822 			vap->iv_lastnonerp = ticks;
1823 			vap->iv_flags_ext |= IEEE80211_FEXT_NONERP_PR;
1824 			/*
1825 			 * XXX TODO: this may need to check all VAPs?
1826 			 */
1827 			if (vap->iv_protmode != IEEE80211_PROT_NONE &&
1828 			    (vap->iv_flags & IEEE80211_F_USEPROT) == 0) {
1829 				IEEE80211_NOTE_FRAME(vap,
1830 				    IEEE80211_MSG_ASSOC, wh,
1831 				    "non-ERP present on channel %d "
1832 				    "(saw erp 0x%x from channel %d), "
1833 				    "enable use of protection",
1834 				    ic->ic_curchan->ic_ieee,
1835 				    scan.erp, scan.chan);
1836 				vap->iv_flags |= IEEE80211_F_USEPROT;
1837 				ieee80211_vap_update_erp_protmode(vap);
1838 			}
1839 		}
1840 		/*
1841 		 * Check beacon for non-HT station on HT channel
1842 		 * and update HT BSS occupancy as appropriate.
1843 		 */
1844 		if (IEEE80211_IS_CHAN_HT(ic->ic_curchan)) {
1845 			if (scan.status & IEEE80211_BPARSE_OFFCHAN) {
1846 				/*
1847 				 * Off control channel; only check frames
1848 				 * that come in the extension channel when
1849 				 * operating w/ HT40.
1850 				 */
1851 				if (!IEEE80211_IS_CHAN_HT40(ic->ic_curchan))
1852 					break;
1853 				if (scan.chan != ic->ic_curchan->ic_extieee)
1854 					break;
1855 			}
1856 			if (scan.htinfo == NULL) {
1857 				ieee80211_htprot_update(vap,
1858 				    IEEE80211_HTINFO_OPMODE_PROTOPT |
1859 				    IEEE80211_HTINFO_NONHT_PRESENT);
1860 			} else if (ishtmixed(scan.htinfo)) {
1861 				/* XXX? take NONHT_PRESENT from beacon? */
1862 				ieee80211_htprot_update(vap,
1863 				    IEEE80211_HTINFO_OPMODE_MIXED |
1864 				    IEEE80211_HTINFO_NONHT_PRESENT);
1865 			}
1866 		}
1867 		break;
1868 	}
1869 
1870 	case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1871 		if (vap->iv_state != IEEE80211_S_RUN) {
1872 			vap->iv_stats.is_rx_mgtdiscard++;
1873 			return;
1874 		}
1875 		/*
1876 		 * Consult the ACL policy module if setup.
1877 		 */
1878 		if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1879 			IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1880 			    wh, NULL, "%s", "disallowed by ACL");
1881 			vap->iv_stats.is_rx_acl++;
1882 			return;
1883 		}
1884 		/*
1885 		 * prreq frame format
1886 		 *	[tlv] ssid
1887 		 *	[tlv] supported rates
1888 		 *	[tlv] extended supported rates
1889 		 */
1890 		ssid = rates = xrates = NULL;
1891 		while (efrm - frm > 1) {
1892 			IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1893 			switch (*frm) {
1894 			case IEEE80211_ELEMID_SSID:
1895 				ssid = frm;
1896 				break;
1897 			case IEEE80211_ELEMID_RATES:
1898 				rates = frm;
1899 				break;
1900 			case IEEE80211_ELEMID_XRATES:
1901 				xrates = frm;
1902 				break;
1903 			}
1904 			frm += frm[1] + 2;
1905 		}
1906 		IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
1907 		if (xrates != NULL)
1908 			IEEE80211_VERIFY_ELEMENT(xrates,
1909 				IEEE80211_RATE_MAXSIZE - rates[1], return);
1910 		IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
1911 		IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return);
1912 		if ((vap->iv_flags & IEEE80211_F_HIDESSID) && ssid[1] == 0) {
1913 			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1914 			    wh, NULL,
1915 			    "%s", "no ssid with ssid suppression enabled");
1916 			vap->iv_stats.is_rx_ssidmismatch++; /*XXX*/
1917 			return;
1918 		}
1919 
1920 		/* XXX find a better class or define it's own */
1921 		IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
1922 		    "%s", "recv probe req");
1923 		/*
1924 		 * Some legacy 11b clients cannot hack a complete
1925 		 * probe response frame.  When the request includes
1926 		 * only a bare-bones rate set, communicate this to
1927 		 * the transmit side.
1928 		 */
1929 		ieee80211_send_proberesp(vap, wh->i_addr2,
1930 		    is11bclient(rates, xrates) ? IEEE80211_SEND_LEGACY_11B : 0);
1931 		break;
1932 
1933 	case IEEE80211_FC0_SUBTYPE_AUTH: {
1934 		uint16_t algo, seq, status;
1935 
1936 		if (vap->iv_state != IEEE80211_S_RUN) {
1937 			vap->iv_stats.is_rx_mgtdiscard++;
1938 			return;
1939 		}
1940 		if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) {
1941 			IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1942 			    wh, NULL, "%s", "wrong bssid");
1943 			vap->iv_stats.is_rx_wrongbss++;	/*XXX unique stat?*/
1944 			return;
1945 		}
1946 		/*
1947 		 * auth frame format
1948 		 *	[2] algorithm
1949 		 *	[2] sequence
1950 		 *	[2] status
1951 		 *	[tlv*] challenge
1952 		 */
1953 		IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return);
1954 		algo   = le16toh(*(uint16_t *)frm);
1955 		seq    = le16toh(*(uint16_t *)(frm + 2));
1956 		status = le16toh(*(uint16_t *)(frm + 4));
1957 		IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2,
1958 		    "recv auth frame with algorithm %d seq %d", algo, seq);
1959 		/*
1960 		 * Consult the ACL policy module if setup.
1961 		 */
1962 		if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1963 			IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1964 			    wh, NULL, "%s", "disallowed by ACL");
1965 			vap->iv_stats.is_rx_acl++;
1966 			ieee80211_send_error(ni, wh->i_addr2,
1967 			    IEEE80211_FC0_SUBTYPE_AUTH,
1968 			    (seq+1) | (IEEE80211_STATUS_UNSPECIFIED<<16));
1969 			return;
1970 		}
1971 		if (vap->iv_flags & IEEE80211_F_COUNTERM) {
1972 			IEEE80211_DISCARD(vap,
1973 			    IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO,
1974 			    wh, NULL, "%s", "TKIP countermeasures enabled");
1975 			vap->iv_stats.is_rx_auth_countermeasures++;
1976 			ieee80211_send_error(ni, wh->i_addr2,
1977 				IEEE80211_FC0_SUBTYPE_AUTH,
1978 				IEEE80211_REASON_MIC_FAILURE);
1979 			return;
1980 		}
1981 		if (algo == IEEE80211_AUTH_ALG_SHARED)
1982 			hostap_auth_shared(ni, wh, frm + 6, efrm, rssi, nf,
1983 			    seq, status);
1984 		else if (algo == IEEE80211_AUTH_ALG_OPEN)
1985 			hostap_auth_open(ni, wh, rssi, nf, seq, status);
1986 		else if (algo == IEEE80211_AUTH_ALG_LEAP) {
1987 			authalgreject(ni, wh, algo,
1988 			    seq+1, IEEE80211_STATUS_ALG);
1989 			return;
1990 		} else {
1991 			/*
1992 			 * We assume that an unknown algorithm is the result
1993 			 * of a decryption failure on a shared key auth frame;
1994 			 * return a status code appropriate for that instead
1995 			 * of IEEE80211_STATUS_ALG.
1996 			 *
1997 			 * NB: a seq# of 4 is intentional; the decrypted
1998 			 *     frame likely has a bogus seq value.
1999 			 */
2000 			authalgreject(ni, wh, algo,
2001 			    4, IEEE80211_STATUS_CHALLENGE);
2002 			return;
2003 		}
2004 		break;
2005 	}
2006 
2007 	case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
2008 	case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: {
2009 		uint16_t capinfo, lintval;
2010 		struct ieee80211_rsnparms rsnparms;
2011 
2012 		if (vap->iv_state != IEEE80211_S_RUN) {
2013 			vap->iv_stats.is_rx_mgtdiscard++;
2014 			return;
2015 		}
2016 		if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) {
2017 			IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2018 			    wh, NULL, "%s", "wrong bssid");
2019 			vap->iv_stats.is_rx_assoc_bss++;
2020 			return;
2021 		}
2022 		if (subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) {
2023 			reassoc = 1;
2024 			resp = IEEE80211_FC0_SUBTYPE_REASSOC_RESP;
2025 		} else {
2026 			reassoc = 0;
2027 			resp = IEEE80211_FC0_SUBTYPE_ASSOC_RESP;
2028 		}
2029 		if (ni == vap->iv_bss) {
2030 			IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2,
2031 			    "deny %s request, sta not authenticated",
2032 			    reassoc ? "reassoc" : "assoc");
2033 			ieee80211_send_error(ni, wh->i_addr2,
2034 			    IEEE80211_FC0_SUBTYPE_DEAUTH,
2035 			    IEEE80211_REASON_ASSOC_NOT_AUTHED);
2036 			vap->iv_stats.is_rx_assoc_notauth++;
2037 			return;
2038 		}
2039 
2040 		/*
2041 		 * asreq frame format
2042 		 *	[2] capability information
2043 		 *	[2] listen interval
2044 		 *	[6*] current AP address (reassoc only)
2045 		 *	[tlv] ssid
2046 		 *	[tlv] supported rates
2047 		 *	[tlv] extended supported rates
2048 		 *	[tlv] WPA or RSN
2049 		 *	[tlv] HT capabilities
2050 		 *	[tlv] Atheros capabilities
2051 		 */
2052 		IEEE80211_VERIFY_LENGTH(efrm - frm, (reassoc ? 10 : 4), return);
2053 		capinfo = le16toh(*(uint16_t *)frm);	frm += 2;
2054 		lintval = le16toh(*(uint16_t *)frm);	frm += 2;
2055 		if (reassoc)
2056 			frm += 6;	/* ignore current AP info */
2057 		ssid = rates = xrates = wpa = rsn = wme = ath = htcap = NULL;
2058 		vhtcap = vhtinfo = NULL;
2059 		sfrm = frm;
2060 		while (efrm - frm > 1) {
2061 			IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
2062 			switch (*frm) {
2063 			case IEEE80211_ELEMID_SSID:
2064 				ssid = frm;
2065 				break;
2066 			case IEEE80211_ELEMID_RATES:
2067 				rates = frm;
2068 				break;
2069 			case IEEE80211_ELEMID_XRATES:
2070 				xrates = frm;
2071 				break;
2072 			case IEEE80211_ELEMID_RSN:
2073 				rsn = frm;
2074 				break;
2075 			case IEEE80211_ELEMID_HTCAP:
2076 				htcap = frm;
2077 				break;
2078 			case IEEE80211_ELEMID_VHT_CAP:
2079 				vhtcap = frm;
2080 				break;
2081 			case IEEE80211_ELEMID_VHT_OPMODE:
2082 				vhtinfo = frm;
2083 				break;
2084 			case IEEE80211_ELEMID_VENDOR:
2085 				if (iswpaoui(frm))
2086 					wpa = frm;
2087 				else if (iswmeinfo(frm))
2088 					wme = frm;
2089 #ifdef IEEE80211_SUPPORT_SUPERG
2090 				else if (isatherosoui(frm))
2091 					ath = frm;
2092 #endif
2093 				else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) {
2094 					if (ishtcapoui(frm) && htcap == NULL)
2095 						htcap = frm;
2096 				}
2097 				break;
2098 			}
2099 			frm += frm[1] + 2;
2100 		}
2101 		IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
2102 		if (xrates != NULL)
2103 			IEEE80211_VERIFY_ELEMENT(xrates,
2104 				IEEE80211_RATE_MAXSIZE - rates[1], return);
2105 		IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
2106 		IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return);
2107 		if (htcap != NULL) {
2108 			IEEE80211_VERIFY_LENGTH(htcap[1],
2109 			     htcap[0] == IEEE80211_ELEMID_VENDOR ?
2110 			         4 + sizeof(struct ieee80211_ie_htcap)-2 :
2111 			         sizeof(struct ieee80211_ie_htcap)-2,
2112 			     return);		/* XXX just NULL out? */
2113 		}
2114 
2115 		/* Validate VHT IEs */
2116 		if (vhtcap != NULL) {
2117 			IEEE80211_VERIFY_LENGTH(vhtcap[1],
2118 			    sizeof(struct ieee80211_ie_vhtcap) - 2,
2119 			    return);
2120 		}
2121 		if (vhtinfo != NULL) {
2122 			IEEE80211_VERIFY_LENGTH(vhtinfo[1],
2123 			    sizeof(struct ieee80211_ie_vht_operation) - 2,
2124 			    return);
2125 		}
2126 
2127 		if ((vap->iv_flags & IEEE80211_F_WPA) &&
2128 		    !wpa_assocreq(ni, &rsnparms, wh, wpa, rsn, capinfo))
2129 			return;
2130 		/* discard challenge after association */
2131 		if (ni->ni_challenge != NULL) {
2132 			IEEE80211_FREE(ni->ni_challenge, M_80211_NODE);
2133 			ni->ni_challenge = NULL;
2134 		}
2135 		/* NB: 802.11 spec says to ignore station's privacy bit */
2136 		if ((capinfo & IEEE80211_CAPINFO_ESS) == 0) {
2137 			capinfomismatch(ni, wh, reassoc, resp,
2138 			    "capability", capinfo);
2139 			return;
2140 		}
2141 		/*
2142 		 * Disallow re-associate w/ invalid slot time setting.
2143 		 */
2144 		if (ni->ni_associd != 0 &&
2145 		    IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2146 		    ((ni->ni_capinfo ^ capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME)) {
2147 			capinfomismatch(ni, wh, reassoc, resp,
2148 			    "slot time", capinfo);
2149 			return;
2150 		}
2151 		rate = ieee80211_setup_rates(ni, rates, xrates,
2152 				IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
2153 				IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
2154 		if (rate & IEEE80211_RATE_BASIC) {
2155 			ratesetmismatch(ni, wh, reassoc, resp, "legacy", rate);
2156 			vap->iv_stats.is_rx_assoc_norate++;
2157 			return;
2158 		}
2159 		/*
2160 		 * If constrained to 11g-only stations reject an
2161 		 * 11b-only station.  We cheat a bit here by looking
2162 		 * at the max negotiated xmit rate and assuming anyone
2163 		 * with a best rate <24Mb/s is an 11b station.
2164 		 */
2165 		if ((vap->iv_flags & IEEE80211_F_PUREG) && rate < 48) {
2166 			ratesetmismatch(ni, wh, reassoc, resp, "11g", rate);
2167 			vap->iv_stats.is_rx_assoc_norate++;
2168 			return;
2169 		}
2170 
2171 		/*
2172 		 * Do HT rate set handling and setup HT node state.
2173 		 */
2174 		ni->ni_chan = vap->iv_bss->ni_chan;
2175 
2176 		/* VHT */
2177 		if (IEEE80211_IS_CHAN_VHT(ni->ni_chan) &&
2178 		    vhtcap != NULL &&
2179 		    vhtinfo != NULL) {
2180 			/* XXX TODO; see below */
2181 			printf("%s: VHT TODO!\n", __func__);
2182 			ieee80211_vht_node_init(ni);
2183 			ieee80211_vht_update_cap(ni, vhtcap, vhtinfo);
2184 		} else if (ni->ni_flags & IEEE80211_NODE_VHT)
2185 			ieee80211_vht_node_cleanup(ni);
2186 
2187 		/* HT */
2188 		if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && htcap != NULL) {
2189 			rate = ieee80211_setup_htrates(ni, htcap,
2190 				IEEE80211_F_DOFMCS | IEEE80211_F_DONEGO |
2191 				IEEE80211_F_DOBRS);
2192 			if (rate & IEEE80211_RATE_BASIC) {
2193 				ratesetmismatch(ni, wh, reassoc, resp,
2194 				    "HT", rate);
2195 				vap->iv_stats.is_ht_assoc_norate++;
2196 				return;
2197 			}
2198 			ieee80211_ht_node_init(ni);
2199 			ieee80211_ht_updatehtcap(ni, htcap);
2200 		} else if (ni->ni_flags & IEEE80211_NODE_HT)
2201 			ieee80211_ht_node_cleanup(ni);
2202 
2203 		/* Finally - this will use HT/VHT info to change node channel */
2204 		if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && htcap != NULL) {
2205 			ieee80211_ht_updatehtcap_final(ni);
2206 		}
2207 
2208 #ifdef IEEE80211_SUPPORT_SUPERG
2209 		/* Always do ff node cleanup; for A-MSDU */
2210 		ieee80211_ff_node_cleanup(ni);
2211 #endif
2212 		/*
2213 		 * Allow AMPDU operation only with unencrypted traffic
2214 		 * or AES-CCM; the 11n spec only specifies these ciphers
2215 		 * so permitting any others is undefined and can lead
2216 		 * to interoperability problems.
2217 		 */
2218 		if ((ni->ni_flags & IEEE80211_NODE_HT) &&
2219 		    (((vap->iv_flags & IEEE80211_F_WPA) &&
2220 		      rsnparms.rsn_ucastcipher != IEEE80211_CIPHER_AES_CCM) ||
2221 		     (vap->iv_flags & (IEEE80211_F_WPA|IEEE80211_F_PRIVACY)) == IEEE80211_F_PRIVACY)) {
2222 			IEEE80211_NOTE(vap,
2223 			    IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni,
2224 			    "disallow HT use because WEP or TKIP requested, "
2225 			    "capinfo 0x%x ucastcipher %d", capinfo,
2226 			    rsnparms.rsn_ucastcipher);
2227 			ieee80211_ht_node_cleanup(ni);
2228 #ifdef IEEE80211_SUPPORT_SUPERG
2229 			/* Always do ff node cleanup; for A-MSDU */
2230 			ieee80211_ff_node_cleanup(ni);
2231 #endif
2232 			vap->iv_stats.is_ht_assoc_downgrade++;
2233 		}
2234 		/*
2235 		 * If constrained to 11n-only stations reject legacy stations.
2236 		 */
2237 		if ((vap->iv_flags_ht & IEEE80211_FHT_PUREN) &&
2238 		    (ni->ni_flags & IEEE80211_NODE_HT) == 0) {
2239 			htcapmismatch(ni, wh, reassoc, resp);
2240 			vap->iv_stats.is_ht_assoc_nohtcap++;
2241 			return;
2242 		}
2243 		IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
2244 		ni->ni_noise = nf;
2245 		ni->ni_intval = lintval;
2246 		ni->ni_capinfo = capinfo;
2247 		ni->ni_fhdwell = vap->iv_bss->ni_fhdwell;
2248 		ni->ni_fhindex = vap->iv_bss->ni_fhindex;
2249 		/*
2250 		 * Store the IEs.
2251 		 * XXX maybe better to just expand
2252 		 */
2253 		if (ieee80211_ies_init(&ni->ni_ies, sfrm, efrm - sfrm)) {
2254 #define	setie(_ie, _off)	ieee80211_ies_setie(ni->ni_ies, _ie, _off)
2255 			if (wpa != NULL)
2256 				setie(wpa_ie, wpa - sfrm);
2257 			if (rsn != NULL)
2258 				setie(rsn_ie, rsn - sfrm);
2259 			if (htcap != NULL)
2260 				setie(htcap_ie, htcap - sfrm);
2261 			if (wme != NULL) {
2262 				setie(wme_ie, wme - sfrm);
2263 				/*
2264 				 * Mark node as capable of QoS.
2265 				 */
2266 				ni->ni_flags |= IEEE80211_NODE_QOS;
2267 				if (ieee80211_parse_wmeie(wme, wh, ni) > 0) {
2268 					if (ni->ni_uapsd != 0)
2269 						ni->ni_flags |=
2270 						    IEEE80211_NODE_UAPSD;
2271 					else
2272 						ni->ni_flags &=
2273 						    ~IEEE80211_NODE_UAPSD;
2274 				}
2275 			} else
2276 				ni->ni_flags &=
2277 				    ~(IEEE80211_NODE_QOS |
2278 				      IEEE80211_NODE_UAPSD);
2279 #ifdef IEEE80211_SUPPORT_SUPERG
2280 			if (ath != NULL) {
2281 				setie(ath_ie, ath - sfrm);
2282 				/*
2283 				 * Parse ATH station parameters.
2284 				 */
2285 				ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
2286 			} else
2287 #endif
2288 				ni->ni_ath_flags = 0;
2289 #undef setie
2290 		} else {
2291 			ni->ni_flags &= ~IEEE80211_NODE_QOS;
2292 			ni->ni_flags &= ~IEEE80211_NODE_UAPSD;
2293 			ni->ni_ath_flags = 0;
2294 		}
2295 		ieee80211_node_join(ni, resp);
2296 		ieee80211_deliver_l2uf(ni);
2297 		break;
2298 	}
2299 
2300 	case IEEE80211_FC0_SUBTYPE_DEAUTH:
2301 	case IEEE80211_FC0_SUBTYPE_DISASSOC: {
2302 		uint16_t reason;
2303 
2304 		if (vap->iv_state != IEEE80211_S_RUN ||
2305 		    /* NB: can happen when in promiscuous mode */
2306 		    !IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) {
2307 			vap->iv_stats.is_rx_mgtdiscard++;
2308 			break;
2309 		}
2310 		/*
2311 		 * deauth/disassoc frame format
2312 		 *	[2] reason
2313 		 */
2314 		IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return);
2315 		reason = le16toh(*(uint16_t *)frm);
2316 		if (subtype == IEEE80211_FC0_SUBTYPE_DEAUTH) {
2317 			vap->iv_stats.is_rx_deauth++;
2318 			IEEE80211_NODE_STAT(ni, rx_deauth);
2319 		} else {
2320 			vap->iv_stats.is_rx_disassoc++;
2321 			IEEE80211_NODE_STAT(ni, rx_disassoc);
2322 		}
2323 		IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni,
2324 		    "recv %s (reason: %d (%s))",
2325 		    ieee80211_mgt_subtype_name(subtype),
2326 		    reason, ieee80211_reason_to_string(reason));
2327 		if (ni != vap->iv_bss)
2328 			ieee80211_node_leave(ni);
2329 		break;
2330 	}
2331 
2332 	case IEEE80211_FC0_SUBTYPE_ACTION:
2333 	case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
2334 		if (ni == vap->iv_bss) {
2335 			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2336 			    wh, NULL, "%s", "unknown node");
2337 			vap->iv_stats.is_rx_mgtdiscard++;
2338 		} else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
2339 		    !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2340 			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2341 			    wh, NULL, "%s", "not for us");
2342 			vap->iv_stats.is_rx_mgtdiscard++;
2343 		} else if (vap->iv_state != IEEE80211_S_RUN) {
2344 			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2345 			    wh, NULL, "wrong state %s",
2346 			    ieee80211_state_name[vap->iv_state]);
2347 			vap->iv_stats.is_rx_mgtdiscard++;
2348 		} else {
2349 			if (ieee80211_parse_action(ni, m0) == 0)
2350 				(void)ic->ic_recv_action(ni, wh, frm, efrm);
2351 		}
2352 		break;
2353 
2354 	case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2355 	case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2356 	case IEEE80211_FC0_SUBTYPE_TIMING_ADV:
2357 	case IEEE80211_FC0_SUBTYPE_ATIM:
2358 		IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2359 		    wh, NULL, "%s", "not handled");
2360 		vap->iv_stats.is_rx_mgtdiscard++;
2361 		break;
2362 
2363 	default:
2364 		IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2365 		    wh, "mgt", "subtype 0x%x not handled", subtype);
2366 		vap->iv_stats.is_rx_badsubtype++;
2367 		break;
2368 	}
2369 }
2370 
2371 static void
2372 hostap_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
2373 {
2374 	switch (subtype) {
2375 	case IEEE80211_FC0_SUBTYPE_PS_POLL:
2376 		ni->ni_vap->iv_recv_pspoll(ni, m);
2377 		break;
2378 	case IEEE80211_FC0_SUBTYPE_BAR:
2379 		ieee80211_recv_bar(ni, m);
2380 		break;
2381 	}
2382 }
2383 
2384 /*
2385  * Process a received ps-poll frame.
2386  */
2387 void
2388 ieee80211_recv_pspoll(struct ieee80211_node *ni, struct mbuf *m0)
2389 {
2390 	struct ieee80211vap *vap = ni->ni_vap;
2391 	struct ieee80211com *ic = vap->iv_ic;
2392 	struct ieee80211_frame_min *wh;
2393 	struct mbuf *m;
2394 	uint16_t aid;
2395 	int qlen;
2396 
2397 	wh = mtod(m0, struct ieee80211_frame_min *);
2398 	if (ni->ni_associd == 0) {
2399 		IEEE80211_DISCARD(vap,
2400 		    IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG,
2401 		    (struct ieee80211_frame *) wh, NULL,
2402 		    "%s", "unassociated station");
2403 		vap->iv_stats.is_ps_unassoc++;
2404 		IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH,
2405 			IEEE80211_REASON_NOT_ASSOCED);
2406 		return;
2407 	}
2408 
2409 	aid = le16toh(*(uint16_t *)wh->i_dur);
2410 	if (aid != ni->ni_associd) {
2411 		IEEE80211_DISCARD(vap,
2412 		    IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG,
2413 		    (struct ieee80211_frame *) wh, NULL,
2414 		    "aid mismatch: sta aid 0x%x poll aid 0x%x",
2415 		    ni->ni_associd, aid);
2416 		vap->iv_stats.is_ps_badaid++;
2417 		/*
2418 		 * NB: We used to deauth the station but it turns out
2419 		 * the Blackberry Curve 8230 (and perhaps other devices)
2420 		 * sometimes send the wrong AID when WME is negotiated.
2421 		 * Being more lenient here seems ok as we already check
2422 		 * the station is associated and we only return frames
2423 		 * queued for the station (i.e. we don't use the AID).
2424 		 */
2425 		return;
2426 	}
2427 
2428 	/* Okay, take the first queued packet and put it out... */
2429 	m = ieee80211_node_psq_dequeue(ni, &qlen);
2430 	if (m == NULL) {
2431 		IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_POWER, wh->i_addr2,
2432 		    "%s", "recv ps-poll, but queue empty");
2433 		ieee80211_send_nulldata(ieee80211_ref_node(ni));
2434 		vap->iv_stats.is_ps_qempty++;	/* XXX node stat */
2435 		if (vap->iv_set_tim != NULL)
2436 			vap->iv_set_tim(ni, 0);	/* just in case */
2437 		return;
2438 	}
2439 	/*
2440 	 * If there are more packets, set the more packets bit
2441 	 * in the packet dispatched to the station; otherwise
2442 	 * turn off the TIM bit.
2443 	 */
2444 	if (qlen != 0) {
2445 		IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
2446 		    "recv ps-poll, send packet, %u still queued", qlen);
2447 		m->m_flags |= M_MORE_DATA;
2448 	} else {
2449 		IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
2450 		    "%s", "recv ps-poll, send packet, queue empty");
2451 		if (vap->iv_set_tim != NULL)
2452 			vap->iv_set_tim(ni, 0);
2453 	}
2454 	m->m_flags |= M_PWR_SAV;		/* bypass PS handling */
2455 
2456 	/*
2457 	 * Do the right thing; if it's an encap'ed frame then
2458 	 * call ieee80211_parent_xmitpkt() else
2459 	 * call ieee80211_vap_xmitpkt().
2460 	 */
2461 	if (m->m_flags & M_ENCAP) {
2462 		(void) ieee80211_parent_xmitpkt(ic, m);
2463 	} else {
2464 		(void) ieee80211_vap_xmitpkt(vap, m);
2465 	}
2466 }
2467