ieee80211_hostap.c revision 193413
1178354Ssam/*-
2178354Ssam * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting
3178354Ssam * All rights reserved.
4178354Ssam *
5178354Ssam * Redistribution and use in source and binary forms, with or without
6178354Ssam * modification, are permitted provided that the following conditions
7178354Ssam * are met:
8178354Ssam * 1. Redistributions of source code must retain the above copyright
9178354Ssam *    notice, this list of conditions and the following disclaimer.
10178354Ssam * 2. Redistributions in binary form must reproduce the above copyright
11178354Ssam *    notice, this list of conditions and the following disclaimer in the
12178354Ssam *    documentation and/or other materials provided with the distribution.
13178354Ssam *
14178354Ssam * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15178354Ssam * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16178354Ssam * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17178354Ssam * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18178354Ssam * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19178354Ssam * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20178354Ssam * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21178354Ssam * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22178354Ssam * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23178354Ssam * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24178354Ssam */
25178354Ssam
26178354Ssam#include <sys/cdefs.h>
27178354Ssam#ifdef __FreeBSD__
28178354Ssam__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_hostap.c 193413 2009-06-03 23:30:25Z sam $");
29178354Ssam#endif
30178354Ssam
31178354Ssam/*
32178354Ssam * IEEE 802.11 HOSTAP mode support.
33178354Ssam */
34178354Ssam#include "opt_inet.h"
35178354Ssam#include "opt_wlan.h"
36178354Ssam
37178354Ssam#include <sys/param.h>
38178354Ssam#include <sys/systm.h>
39178354Ssam#include <sys/mbuf.h>
40178354Ssam#include <sys/malloc.h>
41178354Ssam#include <sys/kernel.h>
42178354Ssam
43178354Ssam#include <sys/socket.h>
44178354Ssam#include <sys/sockio.h>
45178354Ssam#include <sys/endian.h>
46178354Ssam#include <sys/errno.h>
47178354Ssam#include <sys/proc.h>
48178354Ssam#include <sys/sysctl.h>
49178354Ssam
50178354Ssam#include <net/if.h>
51178354Ssam#include <net/if_media.h>
52178354Ssam#include <net/if_llc.h>
53178354Ssam#include <net/ethernet.h>
54178354Ssam
55178354Ssam#include <net/bpf.h>
56178354Ssam
57178354Ssam#include <net80211/ieee80211_var.h>
58178354Ssam#include <net80211/ieee80211_hostap.h>
59178354Ssam#include <net80211/ieee80211_input.h>
60190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG
61190391Ssam#include <net80211/ieee80211_superg.h>
62190391Ssam#endif
63178354Ssam#include <net80211/ieee80211_wds.h>
64178354Ssam
65178354Ssam#define	IEEE80211_RATE2MBS(r)	(((r) & IEEE80211_RATE_VAL) / 2)
66178354Ssam
67178354Ssamstatic	void hostap_vattach(struct ieee80211vap *);
68178354Ssamstatic	int hostap_newstate(struct ieee80211vap *, enum ieee80211_state, int);
69178354Ssamstatic	int hostap_input(struct ieee80211_node *ni, struct mbuf *m,
70192468Ssam	    int rssi, int nf);
71178354Ssamstatic void hostap_deliver_data(struct ieee80211vap *,
72178354Ssam	    struct ieee80211_node *, struct mbuf *);
73178354Ssamstatic void hostap_recv_mgmt(struct ieee80211_node *, struct mbuf *,
74192468Ssam	    int subtype, int rssi, int nf);
75191546Ssamstatic void hostap_recv_ctl(struct ieee80211_node *, struct mbuf *, int);
76178354Ssamstatic void hostap_recv_pspoll(struct ieee80211_node *, struct mbuf *);
77178354Ssam
78178354Ssamvoid
79178354Ssamieee80211_hostap_attach(struct ieee80211com *ic)
80178354Ssam{
81178354Ssam	ic->ic_vattach[IEEE80211_M_HOSTAP] = hostap_vattach;
82178354Ssam}
83178354Ssam
84178354Ssamvoid
85178354Ssamieee80211_hostap_detach(struct ieee80211com *ic)
86178354Ssam{
87178354Ssam}
88178354Ssam
89178354Ssamstatic void
90178354Ssamhostap_vdetach(struct ieee80211vap *vap)
91178354Ssam{
92178354Ssam}
93178354Ssam
94178354Ssamstatic void
95178354Ssamhostap_vattach(struct ieee80211vap *vap)
96178354Ssam{
97178354Ssam	vap->iv_newstate = hostap_newstate;
98178354Ssam	vap->iv_input = hostap_input;
99178354Ssam	vap->iv_recv_mgmt = hostap_recv_mgmt;
100191546Ssam	vap->iv_recv_ctl = hostap_recv_ctl;
101178354Ssam	vap->iv_opdetach = hostap_vdetach;
102178354Ssam	vap->iv_deliver_data = hostap_deliver_data;
103178354Ssam}
104178354Ssam
105178354Ssamstatic void
106178354Ssamsta_disassoc(void *arg, struct ieee80211_node *ni)
107178354Ssam{
108178354Ssam	struct ieee80211vap *vap = arg;
109178354Ssam
110178354Ssam	if (ni->ni_vap == vap && ni->ni_associd != 0) {
111178354Ssam		IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DISASSOC,
112178354Ssam			IEEE80211_REASON_ASSOC_LEAVE);
113178354Ssam		ieee80211_node_leave(ni);
114178354Ssam	}
115178354Ssam}
116178354Ssam
117193413Ssamstatic void
118193413Ssamsta_csa(void *arg, struct ieee80211_node *ni)
119193413Ssam{
120193413Ssam	struct ieee80211vap *vap = arg;
121193413Ssam
122193413Ssam	if (ni->ni_vap == vap && ni->ni_associd != 0)
123193413Ssam		if (ni->ni_inact > vap->iv_inact_init) {
124193413Ssam			ni->ni_inact = vap->iv_inact_init;
125193413Ssam			IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
126193413Ssam			    "%s: inact %u", __func__, ni->ni_inact);
127193413Ssam		}
128193413Ssam}
129193413Ssam
130178354Ssam/*
131178354Ssam * IEEE80211_M_HOSTAP vap state machine handler.
132178354Ssam */
133178354Ssamstatic int
134178354Ssamhostap_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
135178354Ssam{
136178354Ssam	struct ieee80211com *ic = vap->iv_ic;
137178354Ssam	enum ieee80211_state ostate;
138178354Ssam
139178354Ssam	IEEE80211_LOCK_ASSERT(ic);
140178354Ssam
141178354Ssam	ostate = vap->iv_state;
142178354Ssam	IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
143178354Ssam	    __func__, ieee80211_state_name[ostate],
144178354Ssam	    ieee80211_state_name[nstate], arg);
145178354Ssam	vap->iv_state = nstate;			/* state transition */
146178354Ssam	if (ostate != IEEE80211_S_SCAN)
147178354Ssam		ieee80211_cancel_scan(vap);	/* background scan */
148178354Ssam	switch (nstate) {
149178354Ssam	case IEEE80211_S_INIT:
150178354Ssam		switch (ostate) {
151178354Ssam		case IEEE80211_S_SCAN:
152178354Ssam			ieee80211_cancel_scan(vap);
153178354Ssam			break;
154178354Ssam		case IEEE80211_S_CAC:
155178354Ssam			ieee80211_dfs_cac_stop(vap);
156178354Ssam			break;
157178354Ssam		case IEEE80211_S_RUN:
158178354Ssam			ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, vap);
159178354Ssam			break;
160178354Ssam		default:
161178354Ssam			break;
162178354Ssam		}
163178354Ssam		if (ostate != IEEE80211_S_INIT) {
164178354Ssam			/* NB: optimize INIT -> INIT case */
165178354Ssam			ieee80211_reset_bss(vap);
166178354Ssam		}
167178354Ssam		if (vap->iv_auth->ia_detach != NULL)
168178354Ssam			vap->iv_auth->ia_detach(vap);
169178354Ssam		break;
170178354Ssam	case IEEE80211_S_SCAN:
171178354Ssam		switch (ostate) {
172178354Ssam		case IEEE80211_S_CSA:
173178354Ssam		case IEEE80211_S_RUN:
174178354Ssam			ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, vap);
175178354Ssam			/*
176178354Ssam			 * Clear overlapping BSS state; the beacon frame
177178354Ssam			 * will be reconstructed on transition to the RUN
178178354Ssam			 * state and the timeout routines check if the flag
179178354Ssam			 * is set before doing anything so this is sufficient.
180178354Ssam			 */
181178354Ssam			ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR;
182178354Ssam			ic->ic_flags_ext &= ~IEEE80211_FEXT_NONHT_PR;
183178354Ssam			/* fall thru... */
184178354Ssam		case IEEE80211_S_CAC:
185178354Ssam			/*
186178354Ssam			 * NB: We may get here because of a manual channel
187178354Ssam			 *     change in which case we need to stop CAC
188178354Ssam			 * XXX no need to stop if ostate RUN but it's ok
189178354Ssam			 */
190178354Ssam			ieee80211_dfs_cac_stop(vap);
191178354Ssam			/* fall thru... */
192178354Ssam		case IEEE80211_S_INIT:
193178354Ssam			if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
194178354Ssam			    !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan)) {
195178354Ssam				/*
196178354Ssam				 * Already have a channel; bypass the
197178354Ssam				 * scan and startup immediately.
198178354Ssam				 * ieee80211_create_ibss will call back to
199178354Ssam				 * move us to RUN state.
200178354Ssam				 */
201178354Ssam				ieee80211_create_ibss(vap, vap->iv_des_chan);
202178354Ssam				break;
203178354Ssam			}
204178354Ssam			/*
205178354Ssam			 * Initiate a scan.  We can come here as a result
206178354Ssam			 * of an IEEE80211_IOC_SCAN_REQ too in which case
207178354Ssam			 * the vap will be marked with IEEE80211_FEXT_SCANREQ
208178354Ssam			 * and the scan request parameters will be present
209178354Ssam			 * in iv_scanreq.  Otherwise we do the default.
210178354Ssam			 */
211178354Ssam			if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
212178354Ssam				ieee80211_check_scan(vap,
213178354Ssam				    vap->iv_scanreq_flags,
214178354Ssam				    vap->iv_scanreq_duration,
215178354Ssam				    vap->iv_scanreq_mindwell,
216178354Ssam				    vap->iv_scanreq_maxdwell,
217178354Ssam				    vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
218178354Ssam				vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
219178354Ssam			} else
220178354Ssam				ieee80211_check_scan_current(vap);
221178354Ssam			break;
222178354Ssam		case IEEE80211_S_SCAN:
223178354Ssam			/*
224178354Ssam			 * A state change requires a reset; scan.
225178354Ssam			 */
226178354Ssam			ieee80211_check_scan_current(vap);
227178354Ssam			break;
228178354Ssam		default:
229178354Ssam			break;
230178354Ssam		}
231178354Ssam		break;
232178354Ssam	case IEEE80211_S_CAC:
233178354Ssam		/*
234178354Ssam		 * Start CAC on a DFS channel.  We come here when starting
235178354Ssam		 * a bss on a DFS channel (see ieee80211_create_ibss).
236178354Ssam		 */
237178354Ssam		ieee80211_dfs_cac_start(vap);
238178354Ssam		break;
239178354Ssam	case IEEE80211_S_RUN:
240178354Ssam		if (vap->iv_flags & IEEE80211_F_WPA) {
241178354Ssam			/* XXX validate prerequisites */
242178354Ssam		}
243178354Ssam		switch (ostate) {
244178354Ssam		case IEEE80211_S_INIT:
245178354Ssam			/*
246178354Ssam			 * Already have a channel; bypass the
247178354Ssam			 * scan and startup immediately.
248178354Ssam			 * Note that ieee80211_create_ibss will call
249178354Ssam			 * back to do a RUN->RUN state change.
250178354Ssam			 */
251178354Ssam			ieee80211_create_ibss(vap,
252178354Ssam			    ieee80211_ht_adjust_channel(ic,
253178354Ssam				ic->ic_curchan, vap->iv_flags_ext));
254178354Ssam			/* NB: iv_bss is changed on return */
255178354Ssam			break;
256178354Ssam		case IEEE80211_S_CAC:
257178354Ssam			/*
258178354Ssam			 * NB: This is the normal state change when CAC
259178354Ssam			 * expires and no radar was detected; no need to
260178354Ssam			 * clear the CAC timer as it's already expired.
261178354Ssam			 */
262178354Ssam			/* fall thru... */
263178354Ssam		case IEEE80211_S_CSA:
264178354Ssam			/*
265193413Ssam			 * Shorten inactivity timer of associated stations
266193413Ssam			 * to weed out sta's that don't follow a CSA.
267193413Ssam			 */
268193413Ssam			ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
269193413Ssam			/*
270178354Ssam			 * Update bss node channel to reflect where
271178354Ssam			 * we landed after CSA.
272178354Ssam			 */
273178354Ssam			ieee80211_node_set_chan(vap->iv_bss,
274178354Ssam			    ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
275178354Ssam				ieee80211_htchanflags(vap->iv_bss->ni_chan)));
276178354Ssam			/* XXX bypass debug msgs */
277178354Ssam			break;
278178354Ssam		case IEEE80211_S_SCAN:
279178354Ssam		case IEEE80211_S_RUN:
280178354Ssam#ifdef IEEE80211_DEBUG
281178354Ssam			if (ieee80211_msg_debug(vap)) {
282178354Ssam				struct ieee80211_node *ni = vap->iv_bss;
283178354Ssam				ieee80211_note(vap,
284178354Ssam				    "synchronized with %s ssid ",
285178354Ssam				    ether_sprintf(ni->ni_bssid));
286178354Ssam				ieee80211_print_essid(ni->ni_essid,
287178354Ssam				    ni->ni_esslen);
288178354Ssam				/* XXX MCS/HT */
289178354Ssam				printf(" channel %d start %uMb\n",
290178354Ssam				    ieee80211_chan2ieee(ic, ic->ic_curchan),
291178354Ssam				    IEEE80211_RATE2MBS(ni->ni_txrate));
292178354Ssam			}
293178354Ssam#endif
294178354Ssam			break;
295178354Ssam		default:
296178354Ssam			break;
297178354Ssam		}
298178354Ssam		/*
299178354Ssam		 * Start/stop the authenticator.  We delay until here
300178354Ssam		 * to allow configuration to happen out of order.
301178354Ssam		 */
302178354Ssam		if (vap->iv_auth->ia_attach != NULL) {
303178354Ssam			/* XXX check failure */
304178354Ssam			vap->iv_auth->ia_attach(vap);
305178354Ssam		} else if (vap->iv_auth->ia_detach != NULL) {
306178354Ssam			vap->iv_auth->ia_detach(vap);
307178354Ssam		}
308178354Ssam		ieee80211_node_authorize(vap->iv_bss);
309178354Ssam		break;
310178354Ssam	default:
311178354Ssam		break;
312178354Ssam	}
313178354Ssam	return 0;
314178354Ssam}
315178354Ssam
316178354Ssamstatic void
317178354Ssamhostap_deliver_data(struct ieee80211vap *vap,
318178354Ssam	struct ieee80211_node *ni, struct mbuf *m)
319178354Ssam{
320178354Ssam	struct ether_header *eh = mtod(m, struct ether_header *);
321178354Ssam	struct ifnet *ifp = vap->iv_ifp;
322178354Ssam
323193292Ssam	/* clear driver/net80211 flags before passing up */
324193292Ssam	m->m_flags &= ~(M_80211_RX | M_MCAST | M_BCAST);
325193292Ssam
326178354Ssam	KASSERT(vap->iv_opmode == IEEE80211_M_HOSTAP,
327178354Ssam	    ("gack, opmode %d", vap->iv_opmode));
328178354Ssam	/*
329178354Ssam	 * Do accounting.
330178354Ssam	 */
331178354Ssam	ifp->if_ipackets++;
332178354Ssam	IEEE80211_NODE_STAT(ni, rx_data);
333178354Ssam	IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len);
334178354Ssam	if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
335178354Ssam		m->m_flags |= M_MCAST;		/* XXX M_BCAST? */
336178354Ssam		IEEE80211_NODE_STAT(ni, rx_mcast);
337178354Ssam	} else
338178354Ssam		IEEE80211_NODE_STAT(ni, rx_ucast);
339178354Ssam
340178354Ssam	/* perform as a bridge within the AP */
341178354Ssam	if ((vap->iv_flags & IEEE80211_F_NOBRIDGE) == 0) {
342178354Ssam		struct mbuf *mcopy = NULL;
343178354Ssam
344178354Ssam		if (m->m_flags & M_MCAST) {
345183364Ssam			mcopy = m_dup(m, M_DONTWAIT);
346178354Ssam			if (mcopy == NULL)
347178354Ssam				ifp->if_oerrors++;
348178354Ssam			else
349178354Ssam				mcopy->m_flags |= M_MCAST;
350178354Ssam		} else {
351178354Ssam			/*
352178354Ssam			 * Check if the destination is associated with the
353178354Ssam			 * same vap and authorized to receive traffic.
354178354Ssam			 * Beware of traffic destined for the vap itself;
355178354Ssam			 * sending it will not work; just let it be delivered
356178354Ssam			 * normally.
357178354Ssam			 */
358178354Ssam			struct ieee80211_node *sta = ieee80211_find_vap_node(
359178354Ssam			     &vap->iv_ic->ic_sta, vap, eh->ether_dhost);
360178354Ssam			if (sta != NULL) {
361178354Ssam				if (ieee80211_node_is_authorized(sta)) {
362178354Ssam					/*
363178354Ssam					 * Beware of sending to ourself; this
364178354Ssam					 * needs to happen via the normal
365178354Ssam					 * input path.
366178354Ssam					 */
367178354Ssam					if (sta != vap->iv_bss) {
368178354Ssam						mcopy = m;
369178354Ssam						m = NULL;
370178354Ssam					}
371178354Ssam				} else {
372178354Ssam					vap->iv_stats.is_rx_unauth++;
373178354Ssam					IEEE80211_NODE_STAT(sta, rx_unauth);
374178354Ssam				}
375178354Ssam				ieee80211_free_node(sta);
376178354Ssam			}
377178354Ssam		}
378178354Ssam		if (mcopy != NULL) {
379178354Ssam			int len, err;
380178354Ssam			len = mcopy->m_pkthdr.len;
381186658Ssam			err = ifp->if_transmit(ifp, mcopy);
382178354Ssam			if (err) {
383178354Ssam				/* NB: IFQ_HANDOFF reclaims mcopy */
384178354Ssam			} else {
385178354Ssam				ifp->if_opackets++;
386178354Ssam			}
387178354Ssam		}
388178354Ssam	}
389178354Ssam	if (m != NULL) {
390178354Ssam		/*
391178354Ssam		 * Mark frame as coming from vap's interface.
392178354Ssam		 */
393178354Ssam		m->m_pkthdr.rcvif = ifp;
394178354Ssam		if (m->m_flags & M_MCAST) {
395178354Ssam			/*
396178354Ssam			 * Spam DWDS vap's w/ multicast traffic.
397178354Ssam			 */
398178354Ssam			/* XXX only if dwds in use? */
399178354Ssam			ieee80211_dwds_mcast(vap, m);
400178354Ssam		}
401178354Ssam		if (ni->ni_vlan != 0) {
402178354Ssam			/* attach vlan tag */
403178354Ssam			m->m_pkthdr.ether_vtag = ni->ni_vlan;
404178354Ssam			m->m_flags |= M_VLANTAG;
405178354Ssam		}
406178354Ssam		ifp->if_input(ifp, m);
407178354Ssam	}
408178354Ssam}
409178354Ssam
410178354Ssam/*
411178354Ssam * Decide if a received management frame should be
412178354Ssam * printed when debugging is enabled.  This filters some
413178354Ssam * of the less interesting frames that come frequently
414178354Ssam * (e.g. beacons).
415178354Ssam */
416178354Ssamstatic __inline int
417178354Ssamdoprint(struct ieee80211vap *vap, int subtype)
418178354Ssam{
419178354Ssam	switch (subtype) {
420178354Ssam	case IEEE80211_FC0_SUBTYPE_BEACON:
421178354Ssam		return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN);
422178354Ssam	case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
423178354Ssam		return 0;
424178354Ssam	}
425178354Ssam	return 1;
426178354Ssam}
427178354Ssam
428178354Ssam/*
429178354Ssam * Process a received frame.  The node associated with the sender
430178354Ssam * should be supplied.  If nothing was found in the node table then
431178354Ssam * the caller is assumed to supply a reference to iv_bss instead.
432178354Ssam * The RSSI and a timestamp are also supplied.  The RSSI data is used
433178354Ssam * during AP scanning to select a AP to associate with; it can have
434178354Ssam * any units so long as values have consistent units and higher values
435178354Ssam * mean ``better signal''.  The receive timestamp is currently not used
436178354Ssam * by the 802.11 layer.
437178354Ssam */
438178354Ssamstatic int
439192468Ssamhostap_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf)
440178354Ssam{
441178354Ssam#define	SEQ_LEQ(a,b)	((int)((a)-(b)) <= 0)
442178354Ssam#define	HAS_SEQ(type)	((type & 0x4) == 0)
443178354Ssam	struct ieee80211vap *vap = ni->ni_vap;
444178354Ssam	struct ieee80211com *ic = ni->ni_ic;
445178354Ssam	struct ifnet *ifp = vap->iv_ifp;
446178354Ssam	struct ieee80211_frame *wh;
447178354Ssam	struct ieee80211_key *key;
448178354Ssam	struct ether_header *eh;
449178354Ssam	int hdrspace, need_tap;
450178354Ssam	uint8_t dir, type, subtype, qos;
451178354Ssam	uint8_t *bssid;
452178354Ssam	uint16_t rxseq;
453178354Ssam
454183247Ssam	if (m->m_flags & M_AMPDU_MPDU) {
455178354Ssam		/*
456178354Ssam		 * Fastpath for A-MPDU reorder q resubmission.  Frames
457183247Ssam		 * w/ M_AMPDU_MPDU marked have already passed through
458183247Ssam		 * here but were received out of order and been held on
459183247Ssam		 * the reorder queue.  When resubmitted they are marked
460183247Ssam		 * with the M_AMPDU_MPDU flag and we can bypass most of
461183247Ssam		 * the normal processing.
462178354Ssam		 */
463178354Ssam		wh = mtod(m, struct ieee80211_frame *);
464178354Ssam		type = IEEE80211_FC0_TYPE_DATA;
465178354Ssam		dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
466178354Ssam		subtype = IEEE80211_FC0_SUBTYPE_QOS;
467178354Ssam		hdrspace = ieee80211_hdrspace(ic, wh);	/* XXX optimize? */
468178354Ssam		goto resubmit_ampdu;
469178354Ssam	}
470178354Ssam
471178354Ssam	KASSERT(ni != NULL, ("null node"));
472178354Ssam	ni->ni_inact = ni->ni_inact_reload;
473178354Ssam
474178354Ssam	need_tap = 1;			/* mbuf need to be tapped. */
475178354Ssam	type = -1;			/* undefined */
476178354Ssam
477178354Ssam	if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
478178354Ssam		IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
479178354Ssam		    ni->ni_macaddr, NULL,
480178354Ssam		    "too short (1): len %u", m->m_pkthdr.len);
481178354Ssam		vap->iv_stats.is_rx_tooshort++;
482178354Ssam		goto out;
483178354Ssam	}
484178354Ssam	/*
485178354Ssam	 * Bit of a cheat here, we use a pointer for a 3-address
486178354Ssam	 * frame format but don't reference fields past outside
487178354Ssam	 * ieee80211_frame_min w/o first validating the data is
488178354Ssam	 * present.
489178354Ssam	 */
490178354Ssam	wh = mtod(m, struct ieee80211_frame *);
491178354Ssam
492178354Ssam	if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
493178354Ssam	    IEEE80211_FC0_VERSION_0) {
494178354Ssam		IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
495191547Ssam		    ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x",
496191547Ssam		    wh->i_fc[0], wh->i_fc[1]);
497178354Ssam		vap->iv_stats.is_rx_badversion++;
498178354Ssam		goto err;
499178354Ssam	}
500178354Ssam
501178354Ssam	dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
502178354Ssam	type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
503178354Ssam	subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
504178354Ssam	if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
505178354Ssam		if (dir != IEEE80211_FC1_DIR_NODS)
506178354Ssam			bssid = wh->i_addr1;
507178354Ssam		else if (type == IEEE80211_FC0_TYPE_CTL)
508178354Ssam			bssid = wh->i_addr1;
509178354Ssam		else {
510178354Ssam			if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
511178354Ssam				IEEE80211_DISCARD_MAC(vap,
512178354Ssam				    IEEE80211_MSG_ANY, ni->ni_macaddr,
513178354Ssam				    NULL, "too short (2): len %u",
514178354Ssam				    m->m_pkthdr.len);
515178354Ssam				vap->iv_stats.is_rx_tooshort++;
516178354Ssam				goto out;
517178354Ssam			}
518178354Ssam			bssid = wh->i_addr3;
519178354Ssam		}
520178354Ssam		/*
521178354Ssam		 * Validate the bssid.
522178354Ssam		 */
523178354Ssam		if (!(type == IEEE80211_FC0_TYPE_MGT &&
524178354Ssam		      subtype == IEEE80211_FC0_SUBTYPE_BEACON) &&
525178354Ssam		    !IEEE80211_ADDR_EQ(bssid, vap->iv_bss->ni_bssid) &&
526178354Ssam		    !IEEE80211_ADDR_EQ(bssid, ifp->if_broadcastaddr)) {
527178354Ssam			/* not interested in */
528178354Ssam			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
529178354Ssam			    bssid, NULL, "%s", "not to bss");
530178354Ssam			vap->iv_stats.is_rx_wrongbss++;
531178354Ssam			goto out;
532178354Ssam		}
533178354Ssam
534178354Ssam		IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
535192468Ssam		ni->ni_noise = nf;
536178354Ssam		if (HAS_SEQ(type)) {
537178354Ssam			uint8_t tid = ieee80211_gettid(wh);
538178354Ssam			if (IEEE80211_QOS_HAS_SEQ(wh) &&
539178354Ssam			    TID_TO_WME_AC(tid) >= WME_AC_VI)
540178354Ssam				ic->ic_wme.wme_hipri_traffic++;
541178354Ssam			rxseq = le16toh(*(uint16_t *)wh->i_seq);
542178354Ssam			if ((ni->ni_flags & IEEE80211_NODE_HT) == 0 &&
543178354Ssam			    (wh->i_fc[1] & IEEE80211_FC1_RETRY) &&
544178354Ssam			    SEQ_LEQ(rxseq, ni->ni_rxseqs[tid])) {
545178354Ssam				/* duplicate, discard */
546178354Ssam				IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
547178354Ssam				    bssid, "duplicate",
548178354Ssam				    "seqno <%u,%u> fragno <%u,%u> tid %u",
549178354Ssam				    rxseq >> IEEE80211_SEQ_SEQ_SHIFT,
550178354Ssam				    ni->ni_rxseqs[tid] >>
551178354Ssam					IEEE80211_SEQ_SEQ_SHIFT,
552178354Ssam				    rxseq & IEEE80211_SEQ_FRAG_MASK,
553178354Ssam				    ni->ni_rxseqs[tid] &
554178354Ssam					IEEE80211_SEQ_FRAG_MASK,
555178354Ssam				    tid);
556178354Ssam				vap->iv_stats.is_rx_dup++;
557178354Ssam				IEEE80211_NODE_STAT(ni, rx_dup);
558178354Ssam				goto out;
559178354Ssam			}
560178354Ssam			ni->ni_rxseqs[tid] = rxseq;
561178354Ssam		}
562178354Ssam	}
563178354Ssam
564178354Ssam	switch (type) {
565178354Ssam	case IEEE80211_FC0_TYPE_DATA:
566178354Ssam		hdrspace = ieee80211_hdrspace(ic, wh);
567178354Ssam		if (m->m_len < hdrspace &&
568178354Ssam		    (m = m_pullup(m, hdrspace)) == NULL) {
569178354Ssam			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
570178354Ssam			    ni->ni_macaddr, NULL,
571178354Ssam			    "data too short: expecting %u", hdrspace);
572178354Ssam			vap->iv_stats.is_rx_tooshort++;
573178354Ssam			goto out;		/* XXX */
574178354Ssam		}
575178354Ssam		if (!(dir == IEEE80211_FC1_DIR_TODS ||
576178354Ssam		     (dir == IEEE80211_FC1_DIR_DSTODS &&
577178354Ssam		      (vap->iv_flags & IEEE80211_F_DWDS)))) {
578178354Ssam			if (dir != IEEE80211_FC1_DIR_DSTODS) {
579178354Ssam				IEEE80211_DISCARD(vap,
580178354Ssam				    IEEE80211_MSG_INPUT, wh, "data",
581178354Ssam				    "incorrect dir 0x%x", dir);
582178354Ssam			} else {
583178354Ssam				IEEE80211_DISCARD(vap,
584178354Ssam				    IEEE80211_MSG_INPUT |
585178354Ssam				    IEEE80211_MSG_WDS, wh,
586178354Ssam				    "4-address data",
587178354Ssam				    "%s", "DWDS not enabled");
588178354Ssam			}
589178354Ssam			vap->iv_stats.is_rx_wrongdir++;
590178354Ssam			goto out;
591178354Ssam		}
592178354Ssam		/* check if source STA is associated */
593178354Ssam		if (ni == vap->iv_bss) {
594178354Ssam			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
595178354Ssam			    wh, "data", "%s", "unknown src");
596178354Ssam			ieee80211_send_error(ni, wh->i_addr2,
597178354Ssam			    IEEE80211_FC0_SUBTYPE_DEAUTH,
598178354Ssam			    IEEE80211_REASON_NOT_AUTHED);
599178354Ssam			vap->iv_stats.is_rx_notassoc++;
600178354Ssam			goto err;
601178354Ssam		}
602178354Ssam		if (ni->ni_associd == 0) {
603178354Ssam			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
604178354Ssam			    wh, "data", "%s", "unassoc src");
605178354Ssam			IEEE80211_SEND_MGMT(ni,
606178354Ssam			    IEEE80211_FC0_SUBTYPE_DISASSOC,
607178354Ssam			    IEEE80211_REASON_NOT_ASSOCED);
608178354Ssam			vap->iv_stats.is_rx_notassoc++;
609178354Ssam			goto err;
610178354Ssam		}
611178354Ssam
612178354Ssam		/*
613178354Ssam		 * Check for power save state change.
614178354Ssam		 * XXX out-of-order A-MPDU frames?
615178354Ssam		 */
616178354Ssam		if (((wh->i_fc[1] & IEEE80211_FC1_PWR_MGT) ^
617178354Ssam		    (ni->ni_flags & IEEE80211_NODE_PWR_MGT)))
618178354Ssam			ieee80211_node_pwrsave(ni,
619178354Ssam				wh->i_fc[1] & IEEE80211_FC1_PWR_MGT);
620178354Ssam		/*
621178354Ssam		 * For 4-address packets handle WDS discovery
622178354Ssam		 * notifications.  Once a WDS link is setup frames
623178354Ssam		 * are just delivered to the WDS vap (see below).
624178354Ssam		 */
625178354Ssam		if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap == NULL) {
626178354Ssam			if (!ieee80211_node_is_authorized(ni)) {
627178354Ssam				IEEE80211_DISCARD(vap,
628178354Ssam				    IEEE80211_MSG_INPUT |
629178354Ssam				    IEEE80211_MSG_WDS, wh,
630178354Ssam				    "4-address data",
631178354Ssam				    "%s", "unauthorized port");
632178354Ssam				vap->iv_stats.is_rx_unauth++;
633178354Ssam				IEEE80211_NODE_STAT(ni, rx_unauth);
634178354Ssam				goto err;
635178354Ssam			}
636178354Ssam			ieee80211_dwds_discover(ni, m);
637178354Ssam			return type;
638178354Ssam		}
639178354Ssam
640178354Ssam		/*
641183247Ssam		 * Handle A-MPDU re-ordering.  If the frame is to be
642183247Ssam		 * processed directly then ieee80211_ampdu_reorder
643178354Ssam		 * will return 0; otherwise it has consumed the mbuf
644178354Ssam		 * and we should do nothing more with it.
645178354Ssam		 */
646183247Ssam		if ((m->m_flags & M_AMPDU) &&
647178354Ssam		    ieee80211_ampdu_reorder(ni, m) != 0) {
648178354Ssam			m = NULL;
649178354Ssam			goto out;
650178354Ssam		}
651178354Ssam	resubmit_ampdu:
652178354Ssam
653178354Ssam		/*
654178354Ssam		 * Handle privacy requirements.  Note that we
655178354Ssam		 * must not be preempted from here until after
656178354Ssam		 * we (potentially) call ieee80211_crypto_demic;
657178354Ssam		 * otherwise we may violate assumptions in the
658178354Ssam		 * crypto cipher modules used to do delayed update
659178354Ssam		 * of replay sequence numbers.
660178354Ssam		 */
661178354Ssam		if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
662178354Ssam			if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
663178354Ssam				/*
664178354Ssam				 * Discard encrypted frames when privacy is off.
665178354Ssam				 */
666178354Ssam				IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
667178354Ssam				    wh, "WEP", "%s", "PRIVACY off");
668178354Ssam				vap->iv_stats.is_rx_noprivacy++;
669178354Ssam				IEEE80211_NODE_STAT(ni, rx_noprivacy);
670178354Ssam				goto out;
671178354Ssam			}
672178354Ssam			key = ieee80211_crypto_decap(ni, m, hdrspace);
673178354Ssam			if (key == NULL) {
674178354Ssam				/* NB: stats+msgs handled in crypto_decap */
675178354Ssam				IEEE80211_NODE_STAT(ni, rx_wepfail);
676178354Ssam				goto out;
677178354Ssam			}
678178354Ssam			wh = mtod(m, struct ieee80211_frame *);
679178354Ssam			wh->i_fc[1] &= ~IEEE80211_FC1_WEP;
680178354Ssam		} else {
681178354Ssam			/* XXX M_WEP and IEEE80211_F_PRIVACY */
682178354Ssam			key = NULL;
683178354Ssam		}
684178354Ssam
685178354Ssam		/*
686178354Ssam		 * Save QoS bits for use below--before we strip the header.
687178354Ssam		 */
688178354Ssam		if (subtype == IEEE80211_FC0_SUBTYPE_QOS) {
689178354Ssam			qos = (dir == IEEE80211_FC1_DIR_DSTODS) ?
690178354Ssam			    ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] :
691178354Ssam			    ((struct ieee80211_qosframe *)wh)->i_qos[0];
692178354Ssam		} else
693178354Ssam			qos = 0;
694178354Ssam
695178354Ssam		/*
696178354Ssam		 * Next up, any fragmentation.
697178354Ssam		 */
698178354Ssam		if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
699178354Ssam			m = ieee80211_defrag(ni, m, hdrspace);
700178354Ssam			if (m == NULL) {
701178354Ssam				/* Fragment dropped or frame not complete yet */
702178354Ssam				goto out;
703178354Ssam			}
704178354Ssam		}
705178354Ssam		wh = NULL;		/* no longer valid, catch any uses */
706178354Ssam
707178354Ssam		/*
708178354Ssam		 * Next strip any MSDU crypto bits.
709178354Ssam		 */
710178354Ssam		if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) {
711178354Ssam			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
712178354Ssam			    ni->ni_macaddr, "data", "%s", "demic error");
713178354Ssam			vap->iv_stats.is_rx_demicfail++;
714178354Ssam			IEEE80211_NODE_STAT(ni, rx_demicfail);
715178354Ssam			goto out;
716178354Ssam		}
717178354Ssam		/* copy to listener after decrypt */
718192468Ssam		if (ieee80211_radiotap_active_vap(vap))
719192468Ssam			ieee80211_radiotap_rx(vap, m);
720178354Ssam		need_tap = 0;
721178354Ssam		/*
722178354Ssam		 * Finally, strip the 802.11 header.
723178354Ssam		 */
724178354Ssam		m = ieee80211_decap(vap, m, hdrspace);
725178354Ssam		if (m == NULL) {
726178354Ssam			/* XXX mask bit to check for both */
727178354Ssam			/* don't count Null data frames as errors */
728178354Ssam			if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
729178354Ssam			    subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
730178354Ssam				goto out;
731178354Ssam			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
732178354Ssam			    ni->ni_macaddr, "data", "%s", "decap error");
733178354Ssam			vap->iv_stats.is_rx_decap++;
734178354Ssam			IEEE80211_NODE_STAT(ni, rx_decap);
735178354Ssam			goto err;
736178354Ssam		}
737178354Ssam		eh = mtod(m, struct ether_header *);
738178354Ssam		if (!ieee80211_node_is_authorized(ni)) {
739178354Ssam			/*
740178354Ssam			 * Deny any non-PAE frames received prior to
741178354Ssam			 * authorization.  For open/shared-key
742178354Ssam			 * authentication the port is mark authorized
743178354Ssam			 * after authentication completes.  For 802.1x
744178354Ssam			 * the port is not marked authorized by the
745178354Ssam			 * authenticator until the handshake has completed.
746178354Ssam			 */
747178354Ssam			if (eh->ether_type != htons(ETHERTYPE_PAE)) {
748178354Ssam				IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
749178354Ssam				    eh->ether_shost, "data",
750178354Ssam				    "unauthorized port: ether type 0x%x len %u",
751178354Ssam				    eh->ether_type, m->m_pkthdr.len);
752178354Ssam				vap->iv_stats.is_rx_unauth++;
753178354Ssam				IEEE80211_NODE_STAT(ni, rx_unauth);
754178354Ssam				goto err;
755178354Ssam			}
756178354Ssam		} else {
757178354Ssam			/*
758178354Ssam			 * When denying unencrypted frames, discard
759178354Ssam			 * any non-PAE frames received without encryption.
760178354Ssam			 */
761178354Ssam			if ((vap->iv_flags & IEEE80211_F_DROPUNENC) &&
762178354Ssam			    (key == NULL && (m->m_flags & M_WEP) == 0) &&
763178354Ssam			    eh->ether_type != htons(ETHERTYPE_PAE)) {
764178354Ssam				/*
765178354Ssam				 * Drop unencrypted frames.
766178354Ssam				 */
767178354Ssam				vap->iv_stats.is_rx_unencrypted++;
768178354Ssam				IEEE80211_NODE_STAT(ni, rx_unencrypted);
769178354Ssam				goto out;
770178354Ssam			}
771178354Ssam		}
772178354Ssam		/* XXX require HT? */
773178354Ssam		if (qos & IEEE80211_QOS_AMSDU) {
774178354Ssam			m = ieee80211_decap_amsdu(ni, m);
775178354Ssam			if (m == NULL)
776178354Ssam				return IEEE80211_FC0_TYPE_DATA;
777190391Ssam		} else {
778190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG
779190391Ssam			m = ieee80211_decap_fastframe(vap, ni, m);
780190391Ssam			if (m == NULL)
781178354Ssam				return IEEE80211_FC0_TYPE_DATA;
782190391Ssam#endif
783178354Ssam		}
784178354Ssam		if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap != NULL)
785178354Ssam			ieee80211_deliver_data(ni->ni_wdsvap, ni, m);
786178354Ssam		else
787178354Ssam			hostap_deliver_data(vap, ni, m);
788178354Ssam		return IEEE80211_FC0_TYPE_DATA;
789178354Ssam
790178354Ssam	case IEEE80211_FC0_TYPE_MGT:
791178354Ssam		vap->iv_stats.is_rx_mgmt++;
792178354Ssam		IEEE80211_NODE_STAT(ni, rx_mgmt);
793178354Ssam		if (dir != IEEE80211_FC1_DIR_NODS) {
794178354Ssam			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
795178354Ssam			    wh, "mgt", "incorrect dir 0x%x", dir);
796178354Ssam			vap->iv_stats.is_rx_wrongdir++;
797178354Ssam			goto err;
798178354Ssam		}
799178354Ssam		if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
800178354Ssam			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
801178354Ssam			    ni->ni_macaddr, "mgt", "too short: len %u",
802178354Ssam			    m->m_pkthdr.len);
803178354Ssam			vap->iv_stats.is_rx_tooshort++;
804178354Ssam			goto out;
805178354Ssam		}
806178354Ssam		if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
807178354Ssam			/* ensure return frames are unicast */
808178354Ssam			IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
809178354Ssam			    wh, NULL, "source is multicast: %s",
810178354Ssam			    ether_sprintf(wh->i_addr2));
811178354Ssam			vap->iv_stats.is_rx_mgtdiscard++;	/* XXX stat */
812178354Ssam			goto out;
813178354Ssam		}
814178354Ssam#ifdef IEEE80211_DEBUG
815178354Ssam		if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) ||
816178354Ssam		    ieee80211_msg_dumppkts(vap)) {
817178354Ssam			if_printf(ifp, "received %s from %s rssi %d\n",
818178354Ssam			    ieee80211_mgt_subtype_name[subtype >>
819178354Ssam				IEEE80211_FC0_SUBTYPE_SHIFT],
820178354Ssam			    ether_sprintf(wh->i_addr2), rssi);
821178354Ssam		}
822178354Ssam#endif
823178354Ssam		if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
824178354Ssam			if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) {
825178354Ssam				/*
826178354Ssam				 * Only shared key auth frames with a challenge
827178354Ssam				 * should be encrypted, discard all others.
828178354Ssam				 */
829178354Ssam				IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
830178354Ssam				    wh, NULL,
831178354Ssam				    "%s", "WEP set but not permitted");
832178354Ssam				vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
833178354Ssam				goto out;
834178354Ssam			}
835178354Ssam			if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
836178354Ssam				/*
837178354Ssam				 * Discard encrypted frames when privacy is off.
838178354Ssam				 */
839178354Ssam				IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
840178354Ssam				    wh, NULL, "%s", "WEP set but PRIVACY off");
841178354Ssam				vap->iv_stats.is_rx_noprivacy++;
842178354Ssam				goto out;
843178354Ssam			}
844178354Ssam			hdrspace = ieee80211_hdrspace(ic, wh);
845178354Ssam			key = ieee80211_crypto_decap(ni, m, hdrspace);
846178354Ssam			if (key == NULL) {
847178354Ssam				/* NB: stats+msgs handled in crypto_decap */
848178354Ssam				goto out;
849178354Ssam			}
850178354Ssam			wh = mtod(m, struct ieee80211_frame *);
851178354Ssam			wh->i_fc[1] &= ~IEEE80211_FC1_WEP;
852178354Ssam		}
853192468Ssam		vap->iv_recv_mgmt(ni, m, subtype, rssi, nf);
854191534Ssam		goto out;
855178354Ssam
856178354Ssam	case IEEE80211_FC0_TYPE_CTL:
857178354Ssam		vap->iv_stats.is_rx_ctl++;
858178354Ssam		IEEE80211_NODE_STAT(ni, rx_ctrl);
859191546Ssam		vap->iv_recv_ctl(ni, m, subtype);
860178354Ssam		goto out;
861178354Ssam	default:
862178354Ssam		IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
863178354Ssam		    wh, "bad", "frame type 0x%x", type);
864178354Ssam		/* should not come here */
865178354Ssam		break;
866178354Ssam	}
867178354Ssamerr:
868178354Ssam	ifp->if_ierrors++;
869178354Ssamout:
870178354Ssam	if (m != NULL) {
871192765Ssam		if (need_tap && ieee80211_radiotap_active_vap(vap))
872192468Ssam			ieee80211_radiotap_rx(vap, m);
873178354Ssam		m_freem(m);
874178354Ssam	}
875178354Ssam	return type;
876178354Ssam#undef SEQ_LEQ
877178354Ssam}
878178354Ssam
879178354Ssamstatic void
880178354Ssamhostap_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh,
881192468Ssam    int rssi, int nf, uint16_t seq, uint16_t status)
882178354Ssam{
883178354Ssam	struct ieee80211vap *vap = ni->ni_vap;
884178354Ssam
885178354Ssam	KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state));
886178354Ssam
887178354Ssam	if (ni->ni_authmode == IEEE80211_AUTH_SHARED) {
888178354Ssam		IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
889178354Ssam		    ni->ni_macaddr, "open auth",
890178354Ssam		    "bad sta auth mode %u", ni->ni_authmode);
891178354Ssam		vap->iv_stats.is_rx_bad_auth++;	/* XXX */
892178354Ssam		/*
893178354Ssam		 * Clear any challenge text that may be there if
894178354Ssam		 * a previous shared key auth failed and then an
895178354Ssam		 * open auth is attempted.
896178354Ssam		 */
897178354Ssam		if (ni->ni_challenge != NULL) {
898186302Ssam			free(ni->ni_challenge, M_80211_NODE);
899178354Ssam			ni->ni_challenge = NULL;
900178354Ssam		}
901178354Ssam		/* XXX hack to workaround calling convention */
902178354Ssam		ieee80211_send_error(ni, wh->i_addr2,
903178354Ssam		    IEEE80211_FC0_SUBTYPE_AUTH,
904178354Ssam		    (seq + 1) | (IEEE80211_STATUS_ALG<<16));
905178354Ssam		return;
906178354Ssam	}
907178354Ssam	if (seq != IEEE80211_AUTH_OPEN_REQUEST) {
908178354Ssam		vap->iv_stats.is_rx_bad_auth++;
909178354Ssam		return;
910178354Ssam	}
911178354Ssam	/* always accept open authentication requests */
912178354Ssam	if (ni == vap->iv_bss) {
913178354Ssam		ni = ieee80211_dup_bss(vap, wh->i_addr2);
914178354Ssam		if (ni == NULL)
915178354Ssam			return;
916178354Ssam	} else if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0)
917178354Ssam		(void) ieee80211_ref_node(ni);
918178354Ssam	/*
919178354Ssam	 * Mark the node as referenced to reflect that it's
920178354Ssam	 * reference count has been bumped to insure it remains
921178354Ssam	 * after the transaction completes.
922178354Ssam	 */
923178354Ssam	ni->ni_flags |= IEEE80211_NODE_AREF;
924186099Ssam	/*
925186151Ssam	 * Mark the node as requiring a valid association id
926186099Ssam	 * before outbound traffic is permitted.
927186099Ssam	 */
928186099Ssam	ni->ni_flags |= IEEE80211_NODE_ASSOCID;
929178354Ssam
930178354Ssam	if (vap->iv_acl != NULL &&
931178354Ssam	    vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) {
932178354Ssam		/*
933178354Ssam		 * When the ACL policy is set to RADIUS we defer the
934178354Ssam		 * authorization to a user agent.  Dispatch an event,
935178354Ssam		 * a subsequent MLME call will decide the fate of the
936178354Ssam		 * station.  If the user agent is not present then the
937178354Ssam		 * node will be reclaimed due to inactivity.
938178354Ssam		 */
939178354Ssam		IEEE80211_NOTE_MAC(vap,
940178354Ssam		    IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, ni->ni_macaddr,
941178354Ssam		    "%s", "station authentication defered (radius acl)");
942178354Ssam		ieee80211_notify_node_auth(ni);
943178354Ssam	} else {
944178354Ssam		IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1);
945178354Ssam		IEEE80211_NOTE_MAC(vap,
946178354Ssam		    IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni->ni_macaddr,
947178354Ssam		    "%s", "station authenticated (open)");
948178354Ssam		/*
949178354Ssam		 * When 802.1x is not in use mark the port
950178354Ssam		 * authorized at this point so traffic can flow.
951178354Ssam		 */
952178354Ssam		if (ni->ni_authmode != IEEE80211_AUTH_8021X)
953178354Ssam			ieee80211_node_authorize(ni);
954178354Ssam	}
955178354Ssam}
956178354Ssam
957178354Ssamstatic void
958178354Ssamhostap_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh,
959192468Ssam    uint8_t *frm, uint8_t *efrm, int rssi, int nf,
960178354Ssam    uint16_t seq, uint16_t status)
961178354Ssam{
962178354Ssam	struct ieee80211vap *vap = ni->ni_vap;
963178354Ssam	uint8_t *challenge;
964178354Ssam	int allocbs, estatus;
965178354Ssam
966178354Ssam	KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state));
967178354Ssam
968178354Ssam	/*
969178354Ssam	 * NB: this can happen as we allow pre-shared key
970178354Ssam	 * authentication to be enabled w/o wep being turned
971178354Ssam	 * on so that configuration of these can be done
972178354Ssam	 * in any order.  It may be better to enforce the
973178354Ssam	 * ordering in which case this check would just be
974178354Ssam	 * for sanity/consistency.
975178354Ssam	 */
976178354Ssam	if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
977178354Ssam		IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
978178354Ssam		    ni->ni_macaddr, "shared key auth",
979178354Ssam		    "%s", " PRIVACY is disabled");
980178354Ssam		estatus = IEEE80211_STATUS_ALG;
981178354Ssam		goto bad;
982178354Ssam	}
983178354Ssam	/*
984178354Ssam	 * Pre-shared key authentication is evil; accept
985178354Ssam	 * it only if explicitly configured (it is supported
986178354Ssam	 * mainly for compatibility with clients like Mac OS X).
987178354Ssam	 */
988178354Ssam	if (ni->ni_authmode != IEEE80211_AUTH_AUTO &&
989178354Ssam	    ni->ni_authmode != IEEE80211_AUTH_SHARED) {
990178354Ssam		IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
991178354Ssam		    ni->ni_macaddr, "shared key auth",
992178354Ssam		    "bad sta auth mode %u", ni->ni_authmode);
993178354Ssam		vap->iv_stats.is_rx_bad_auth++;	/* XXX maybe a unique error? */
994178354Ssam		estatus = IEEE80211_STATUS_ALG;
995178354Ssam		goto bad;
996178354Ssam	}
997178354Ssam
998178354Ssam	challenge = NULL;
999178354Ssam	if (frm + 1 < efrm) {
1000178354Ssam		if ((frm[1] + 2) > (efrm - frm)) {
1001178354Ssam			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1002178354Ssam			    ni->ni_macaddr, "shared key auth",
1003178354Ssam			    "ie %d/%d too long",
1004178354Ssam			    frm[0], (frm[1] + 2) - (efrm - frm));
1005178354Ssam			vap->iv_stats.is_rx_bad_auth++;
1006178354Ssam			estatus = IEEE80211_STATUS_CHALLENGE;
1007178354Ssam			goto bad;
1008178354Ssam		}
1009178354Ssam		if (*frm == IEEE80211_ELEMID_CHALLENGE)
1010178354Ssam			challenge = frm;
1011178354Ssam		frm += frm[1] + 2;
1012178354Ssam	}
1013178354Ssam	switch (seq) {
1014178354Ssam	case IEEE80211_AUTH_SHARED_CHALLENGE:
1015178354Ssam	case IEEE80211_AUTH_SHARED_RESPONSE:
1016178354Ssam		if (challenge == NULL) {
1017178354Ssam			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1018178354Ssam			    ni->ni_macaddr, "shared key auth",
1019178354Ssam			    "%s", "no challenge");
1020178354Ssam			vap->iv_stats.is_rx_bad_auth++;
1021178354Ssam			estatus = IEEE80211_STATUS_CHALLENGE;
1022178354Ssam			goto bad;
1023178354Ssam		}
1024178354Ssam		if (challenge[1] != IEEE80211_CHALLENGE_LEN) {
1025178354Ssam			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1026178354Ssam			    ni->ni_macaddr, "shared key auth",
1027178354Ssam			    "bad challenge len %d", challenge[1]);
1028178354Ssam			vap->iv_stats.is_rx_bad_auth++;
1029178354Ssam			estatus = IEEE80211_STATUS_CHALLENGE;
1030178354Ssam			goto bad;
1031178354Ssam		}
1032178354Ssam	default:
1033178354Ssam		break;
1034178354Ssam	}
1035178354Ssam	switch (seq) {
1036178354Ssam	case IEEE80211_AUTH_SHARED_REQUEST:
1037178354Ssam		if (ni == vap->iv_bss) {
1038178354Ssam			ni = ieee80211_dup_bss(vap, wh->i_addr2);
1039178354Ssam			if (ni == NULL) {
1040178354Ssam				/* NB: no way to return an error */
1041178354Ssam				return;
1042178354Ssam			}
1043178354Ssam			allocbs = 1;
1044178354Ssam		} else {
1045178354Ssam			if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0)
1046178354Ssam				(void) ieee80211_ref_node(ni);
1047178354Ssam			allocbs = 0;
1048178354Ssam		}
1049178354Ssam		/*
1050178354Ssam		 * Mark the node as referenced to reflect that it's
1051178354Ssam		 * reference count has been bumped to insure it remains
1052178354Ssam		 * after the transaction completes.
1053178354Ssam		 */
1054178354Ssam		ni->ni_flags |= IEEE80211_NODE_AREF;
1055186099Ssam		/*
1056186099Ssam		 * Mark the node as requiring a valid associatio id
1057186099Ssam		 * before outbound traffic is permitted.
1058186099Ssam		 */
1059186099Ssam		ni->ni_flags |= IEEE80211_NODE_ASSOCID;
1060178354Ssam		IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1061192468Ssam		ni->ni_noise = nf;
1062178354Ssam		if (!ieee80211_alloc_challenge(ni)) {
1063178354Ssam			/* NB: don't return error so they rexmit */
1064178354Ssam			return;
1065178354Ssam		}
1066178354Ssam		get_random_bytes(ni->ni_challenge,
1067178354Ssam			IEEE80211_CHALLENGE_LEN);
1068178354Ssam		IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH,
1069178354Ssam		    ni, "shared key %sauth request", allocbs ? "" : "re");
1070178354Ssam		/*
1071178354Ssam		 * When the ACL policy is set to RADIUS we defer the
1072178354Ssam		 * authorization to a user agent.  Dispatch an event,
1073178354Ssam		 * a subsequent MLME call will decide the fate of the
1074178354Ssam		 * station.  If the user agent is not present then the
1075178354Ssam		 * node will be reclaimed due to inactivity.
1076178354Ssam		 */
1077178354Ssam		if (vap->iv_acl != NULL &&
1078178354Ssam		    vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) {
1079178354Ssam			IEEE80211_NOTE_MAC(vap,
1080178354Ssam			    IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL,
1081178354Ssam			    ni->ni_macaddr,
1082178354Ssam			    "%s", "station authentication defered (radius acl)");
1083178354Ssam			ieee80211_notify_node_auth(ni);
1084178354Ssam			return;
1085178354Ssam		}
1086178354Ssam		break;
1087178354Ssam	case IEEE80211_AUTH_SHARED_RESPONSE:
1088178354Ssam		if (ni == vap->iv_bss) {
1089178354Ssam			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1090178354Ssam			    ni->ni_macaddr, "shared key response",
1091178354Ssam			    "%s", "unknown station");
1092178354Ssam			/* NB: don't send a response */
1093178354Ssam			return;
1094178354Ssam		}
1095178354Ssam		if (ni->ni_challenge == NULL) {
1096178354Ssam			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1097178354Ssam			    ni->ni_macaddr, "shared key response",
1098178354Ssam			    "%s", "no challenge recorded");
1099178354Ssam			vap->iv_stats.is_rx_bad_auth++;
1100178354Ssam			estatus = IEEE80211_STATUS_CHALLENGE;
1101178354Ssam			goto bad;
1102178354Ssam		}
1103178354Ssam		if (memcmp(ni->ni_challenge, &challenge[2],
1104178354Ssam			   challenge[1]) != 0) {
1105178354Ssam			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1106178354Ssam			    ni->ni_macaddr, "shared key response",
1107178354Ssam			    "%s", "challenge mismatch");
1108178354Ssam			vap->iv_stats.is_rx_auth_fail++;
1109178354Ssam			estatus = IEEE80211_STATUS_CHALLENGE;
1110178354Ssam			goto bad;
1111178354Ssam		}
1112178354Ssam		IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH,
1113178354Ssam		    ni, "%s", "station authenticated (shared key)");
1114178354Ssam		ieee80211_node_authorize(ni);
1115178354Ssam		break;
1116178354Ssam	default:
1117178354Ssam		IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1118178354Ssam		    ni->ni_macaddr, "shared key auth",
1119178354Ssam		    "bad seq %d", seq);
1120178354Ssam		vap->iv_stats.is_rx_bad_auth++;
1121178354Ssam		estatus = IEEE80211_STATUS_SEQUENCE;
1122178354Ssam		goto bad;
1123178354Ssam	}
1124178354Ssam	IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1);
1125178354Ssam	return;
1126178354Ssambad:
1127178354Ssam	/*
1128178354Ssam	 * Send an error response; but only when operating as an AP.
1129178354Ssam	 */
1130178354Ssam	/* XXX hack to workaround calling convention */
1131178354Ssam	ieee80211_send_error(ni, wh->i_addr2,
1132178354Ssam	    IEEE80211_FC0_SUBTYPE_AUTH,
1133178354Ssam	    (seq + 1) | (estatus<<16));
1134178354Ssam}
1135178354Ssam
1136178354Ssam/*
1137178354Ssam * Convert a WPA cipher selector OUI to an internal
1138178354Ssam * cipher algorithm.  Where appropriate we also
1139178354Ssam * record any key length.
1140178354Ssam */
1141178354Ssamstatic int
1142178354Ssamwpa_cipher(const uint8_t *sel, uint8_t *keylen)
1143178354Ssam{
1144178354Ssam#define	WPA_SEL(x)	(((x)<<24)|WPA_OUI)
1145178354Ssam	uint32_t w = LE_READ_4(sel);
1146178354Ssam
1147178354Ssam	switch (w) {
1148178354Ssam	case WPA_SEL(WPA_CSE_NULL):
1149178354Ssam		return IEEE80211_CIPHER_NONE;
1150178354Ssam	case WPA_SEL(WPA_CSE_WEP40):
1151178354Ssam		if (keylen)
1152178354Ssam			*keylen = 40 / NBBY;
1153178354Ssam		return IEEE80211_CIPHER_WEP;
1154178354Ssam	case WPA_SEL(WPA_CSE_WEP104):
1155178354Ssam		if (keylen)
1156178354Ssam			*keylen = 104 / NBBY;
1157178354Ssam		return IEEE80211_CIPHER_WEP;
1158178354Ssam	case WPA_SEL(WPA_CSE_TKIP):
1159178354Ssam		return IEEE80211_CIPHER_TKIP;
1160178354Ssam	case WPA_SEL(WPA_CSE_CCMP):
1161178354Ssam		return IEEE80211_CIPHER_AES_CCM;
1162178354Ssam	}
1163178354Ssam	return 32;		/* NB: so 1<< is discarded */
1164178354Ssam#undef WPA_SEL
1165178354Ssam}
1166178354Ssam
1167178354Ssam/*
1168178354Ssam * Convert a WPA key management/authentication algorithm
1169178354Ssam * to an internal code.
1170178354Ssam */
1171178354Ssamstatic int
1172178354Ssamwpa_keymgmt(const uint8_t *sel)
1173178354Ssam{
1174178354Ssam#define	WPA_SEL(x)	(((x)<<24)|WPA_OUI)
1175178354Ssam	uint32_t w = LE_READ_4(sel);
1176178354Ssam
1177178354Ssam	switch (w) {
1178178354Ssam	case WPA_SEL(WPA_ASE_8021X_UNSPEC):
1179178354Ssam		return WPA_ASE_8021X_UNSPEC;
1180178354Ssam	case WPA_SEL(WPA_ASE_8021X_PSK):
1181178354Ssam		return WPA_ASE_8021X_PSK;
1182178354Ssam	case WPA_SEL(WPA_ASE_NONE):
1183178354Ssam		return WPA_ASE_NONE;
1184178354Ssam	}
1185178354Ssam	return 0;		/* NB: so is discarded */
1186178354Ssam#undef WPA_SEL
1187178354Ssam}
1188178354Ssam
1189178354Ssam/*
1190178354Ssam * Parse a WPA information element to collect parameters.
1191178354Ssam * Note that we do not validate security parameters; that
1192178354Ssam * is handled by the authenticator; the parsing done here
1193178354Ssam * is just for internal use in making operational decisions.
1194178354Ssam */
1195178354Ssamstatic int
1196178354Ssamieee80211_parse_wpa(struct ieee80211vap *vap, const uint8_t *frm,
1197178354Ssam	struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh)
1198178354Ssam{
1199178354Ssam	uint8_t len = frm[1];
1200178354Ssam	uint32_t w;
1201178354Ssam	int n;
1202178354Ssam
1203178354Ssam	/*
1204178354Ssam	 * Check the length once for fixed parts: OUI, type,
1205178354Ssam	 * version, mcast cipher, and 2 selector counts.
1206178354Ssam	 * Other, variable-length data, must be checked separately.
1207178354Ssam	 */
1208178354Ssam	if ((vap->iv_flags & IEEE80211_F_WPA1) == 0) {
1209178354Ssam		IEEE80211_DISCARD_IE(vap,
1210178354Ssam		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1211178354Ssam		    wh, "WPA", "not WPA, flags 0x%x", vap->iv_flags);
1212178354Ssam		return IEEE80211_REASON_IE_INVALID;
1213178354Ssam	}
1214178354Ssam	if (len < 14) {
1215178354Ssam		IEEE80211_DISCARD_IE(vap,
1216178354Ssam		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1217178354Ssam		    wh, "WPA", "too short, len %u", len);
1218178354Ssam		return IEEE80211_REASON_IE_INVALID;
1219178354Ssam	}
1220178354Ssam	frm += 6, len -= 4;		/* NB: len is payload only */
1221178354Ssam	/* NB: iswapoui already validated the OUI and type */
1222178354Ssam	w = LE_READ_2(frm);
1223178354Ssam	if (w != WPA_VERSION) {
1224178354Ssam		IEEE80211_DISCARD_IE(vap,
1225178354Ssam		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1226178354Ssam		    wh, "WPA", "bad version %u", w);
1227178354Ssam		return IEEE80211_REASON_IE_INVALID;
1228178354Ssam	}
1229178354Ssam	frm += 2, len -= 2;
1230178354Ssam
1231178354Ssam	memset(rsn, 0, sizeof(*rsn));
1232178354Ssam
1233178354Ssam	/* multicast/group cipher */
1234178354Ssam	rsn->rsn_mcastcipher = wpa_cipher(frm, &rsn->rsn_mcastkeylen);
1235178354Ssam	frm += 4, len -= 4;
1236178354Ssam
1237178354Ssam	/* unicast ciphers */
1238178354Ssam	n = LE_READ_2(frm);
1239178354Ssam	frm += 2, len -= 2;
1240178354Ssam	if (len < n*4+2) {
1241178354Ssam		IEEE80211_DISCARD_IE(vap,
1242178354Ssam		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1243178354Ssam		    wh, "WPA", "ucast cipher data too short; len %u, n %u",
1244178354Ssam		    len, n);
1245178354Ssam		return IEEE80211_REASON_IE_INVALID;
1246178354Ssam	}
1247178354Ssam	w = 0;
1248178354Ssam	for (; n > 0; n--) {
1249178354Ssam		w |= 1<<wpa_cipher(frm, &rsn->rsn_ucastkeylen);
1250178354Ssam		frm += 4, len -= 4;
1251178354Ssam	}
1252178354Ssam	if (w & (1<<IEEE80211_CIPHER_TKIP))
1253178354Ssam		rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP;
1254178354Ssam	else
1255178354Ssam		rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM;
1256178354Ssam
1257178354Ssam	/* key management algorithms */
1258178354Ssam	n = LE_READ_2(frm);
1259178354Ssam	frm += 2, len -= 2;
1260178354Ssam	if (len < n*4) {
1261178354Ssam		IEEE80211_DISCARD_IE(vap,
1262178354Ssam		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1263178354Ssam		    wh, "WPA", "key mgmt alg data too short; len %u, n %u",
1264178354Ssam		    len, n);
1265178354Ssam		return IEEE80211_REASON_IE_INVALID;
1266178354Ssam	}
1267178354Ssam	w = 0;
1268178354Ssam	for (; n > 0; n--) {
1269178354Ssam		w |= wpa_keymgmt(frm);
1270178354Ssam		frm += 4, len -= 4;
1271178354Ssam	}
1272178354Ssam	if (w & WPA_ASE_8021X_UNSPEC)
1273178354Ssam		rsn->rsn_keymgmt = WPA_ASE_8021X_UNSPEC;
1274178354Ssam	else
1275178354Ssam		rsn->rsn_keymgmt = WPA_ASE_8021X_PSK;
1276178354Ssam
1277178354Ssam	if (len > 2)		/* optional capabilities */
1278178354Ssam		rsn->rsn_caps = LE_READ_2(frm);
1279178354Ssam
1280178354Ssam	return 0;
1281178354Ssam}
1282178354Ssam
1283178354Ssam/*
1284178354Ssam * Convert an RSN cipher selector OUI to an internal
1285178354Ssam * cipher algorithm.  Where appropriate we also
1286178354Ssam * record any key length.
1287178354Ssam */
1288178354Ssamstatic int
1289178354Ssamrsn_cipher(const uint8_t *sel, uint8_t *keylen)
1290178354Ssam{
1291178354Ssam#define	RSN_SEL(x)	(((x)<<24)|RSN_OUI)
1292178354Ssam	uint32_t w = LE_READ_4(sel);
1293178354Ssam
1294178354Ssam	switch (w) {
1295178354Ssam	case RSN_SEL(RSN_CSE_NULL):
1296178354Ssam		return IEEE80211_CIPHER_NONE;
1297178354Ssam	case RSN_SEL(RSN_CSE_WEP40):
1298178354Ssam		if (keylen)
1299178354Ssam			*keylen = 40 / NBBY;
1300178354Ssam		return IEEE80211_CIPHER_WEP;
1301178354Ssam	case RSN_SEL(RSN_CSE_WEP104):
1302178354Ssam		if (keylen)
1303178354Ssam			*keylen = 104 / NBBY;
1304178354Ssam		return IEEE80211_CIPHER_WEP;
1305178354Ssam	case RSN_SEL(RSN_CSE_TKIP):
1306178354Ssam		return IEEE80211_CIPHER_TKIP;
1307178354Ssam	case RSN_SEL(RSN_CSE_CCMP):
1308178354Ssam		return IEEE80211_CIPHER_AES_CCM;
1309178354Ssam	case RSN_SEL(RSN_CSE_WRAP):
1310178354Ssam		return IEEE80211_CIPHER_AES_OCB;
1311178354Ssam	}
1312178354Ssam	return 32;		/* NB: so 1<< is discarded */
1313178354Ssam#undef WPA_SEL
1314178354Ssam}
1315178354Ssam
1316178354Ssam/*
1317178354Ssam * Convert an RSN key management/authentication algorithm
1318178354Ssam * to an internal code.
1319178354Ssam */
1320178354Ssamstatic int
1321178354Ssamrsn_keymgmt(const uint8_t *sel)
1322178354Ssam{
1323178354Ssam#define	RSN_SEL(x)	(((x)<<24)|RSN_OUI)
1324178354Ssam	uint32_t w = LE_READ_4(sel);
1325178354Ssam
1326178354Ssam	switch (w) {
1327178354Ssam	case RSN_SEL(RSN_ASE_8021X_UNSPEC):
1328178354Ssam		return RSN_ASE_8021X_UNSPEC;
1329178354Ssam	case RSN_SEL(RSN_ASE_8021X_PSK):
1330178354Ssam		return RSN_ASE_8021X_PSK;
1331178354Ssam	case RSN_SEL(RSN_ASE_NONE):
1332178354Ssam		return RSN_ASE_NONE;
1333178354Ssam	}
1334178354Ssam	return 0;		/* NB: so is discarded */
1335178354Ssam#undef RSN_SEL
1336178354Ssam}
1337178354Ssam
1338178354Ssam/*
1339178354Ssam * Parse a WPA/RSN information element to collect parameters
1340178354Ssam * and validate the parameters against what has been
1341178354Ssam * configured for the system.
1342178354Ssam */
1343178354Ssamstatic int
1344178354Ssamieee80211_parse_rsn(struct ieee80211vap *vap, const uint8_t *frm,
1345178354Ssam	struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh)
1346178354Ssam{
1347178354Ssam	uint8_t len = frm[1];
1348178354Ssam	uint32_t w;
1349178354Ssam	int n;
1350178354Ssam
1351178354Ssam	/*
1352178354Ssam	 * Check the length once for fixed parts:
1353178354Ssam	 * version, mcast cipher, and 2 selector counts.
1354178354Ssam	 * Other, variable-length data, must be checked separately.
1355178354Ssam	 */
1356178354Ssam	if ((vap->iv_flags & IEEE80211_F_WPA2) == 0) {
1357178354Ssam		IEEE80211_DISCARD_IE(vap,
1358178354Ssam		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1359178354Ssam		    wh, "WPA", "not RSN, flags 0x%x", vap->iv_flags);
1360178354Ssam		return IEEE80211_REASON_IE_INVALID;
1361178354Ssam	}
1362178354Ssam	if (len < 10) {
1363178354Ssam		IEEE80211_DISCARD_IE(vap,
1364178354Ssam		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1365178354Ssam		    wh, "RSN", "too short, len %u", len);
1366178354Ssam		return IEEE80211_REASON_IE_INVALID;
1367178354Ssam	}
1368178354Ssam	frm += 2;
1369178354Ssam	w = LE_READ_2(frm);
1370178354Ssam	if (w != RSN_VERSION) {
1371178354Ssam		IEEE80211_DISCARD_IE(vap,
1372178354Ssam		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1373178354Ssam		    wh, "RSN", "bad version %u", w);
1374178354Ssam		return IEEE80211_REASON_IE_INVALID;
1375178354Ssam	}
1376178354Ssam	frm += 2, len -= 2;
1377178354Ssam
1378178354Ssam	memset(rsn, 0, sizeof(*rsn));
1379178354Ssam
1380178354Ssam	/* multicast/group cipher */
1381178354Ssam	rsn->rsn_mcastcipher = rsn_cipher(frm, &rsn->rsn_mcastkeylen);
1382178354Ssam	frm += 4, len -= 4;
1383178354Ssam
1384178354Ssam	/* unicast ciphers */
1385178354Ssam	n = LE_READ_2(frm);
1386178354Ssam	frm += 2, len -= 2;
1387178354Ssam	if (len < n*4+2) {
1388178354Ssam		IEEE80211_DISCARD_IE(vap,
1389178354Ssam		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1390178354Ssam		    wh, "RSN", "ucast cipher data too short; len %u, n %u",
1391178354Ssam		    len, n);
1392178354Ssam		return IEEE80211_REASON_IE_INVALID;
1393178354Ssam	}
1394178354Ssam	w = 0;
1395178354Ssam	for (; n > 0; n--) {
1396178354Ssam		w |= 1<<rsn_cipher(frm, &rsn->rsn_ucastkeylen);
1397178354Ssam		frm += 4, len -= 4;
1398178354Ssam	}
1399178354Ssam	if (w & (1<<IEEE80211_CIPHER_TKIP))
1400178354Ssam		rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP;
1401178354Ssam	else
1402178354Ssam		rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM;
1403178354Ssam
1404178354Ssam	/* key management algorithms */
1405178354Ssam	n = LE_READ_2(frm);
1406178354Ssam	frm += 2, len -= 2;
1407178354Ssam	if (len < n*4) {
1408178354Ssam		IEEE80211_DISCARD_IE(vap,
1409178354Ssam		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1410178354Ssam		    wh, "RSN", "key mgmt alg data too short; len %u, n %u",
1411178354Ssam		    len, n);
1412178354Ssam		return IEEE80211_REASON_IE_INVALID;
1413178354Ssam	}
1414178354Ssam	w = 0;
1415178354Ssam	for (; n > 0; n--) {
1416178354Ssam		w |= rsn_keymgmt(frm);
1417178354Ssam		frm += 4, len -= 4;
1418178354Ssam	}
1419178354Ssam	if (w & RSN_ASE_8021X_UNSPEC)
1420178354Ssam		rsn->rsn_keymgmt = RSN_ASE_8021X_UNSPEC;
1421178354Ssam	else
1422178354Ssam		rsn->rsn_keymgmt = RSN_ASE_8021X_PSK;
1423178354Ssam
1424178354Ssam	/* optional RSN capabilities */
1425178354Ssam	if (len > 2)
1426178354Ssam		rsn->rsn_caps = LE_READ_2(frm);
1427178354Ssam	/* XXXPMKID */
1428178354Ssam
1429178354Ssam	return 0;
1430178354Ssam}
1431178354Ssam
1432178354Ssam/*
1433178354Ssam * WPA/802.11i assocation request processing.
1434178354Ssam */
1435178354Ssamstatic int
1436178354Ssamwpa_assocreq(struct ieee80211_node *ni, struct ieee80211_rsnparms *rsnparms,
1437178354Ssam	const struct ieee80211_frame *wh, const uint8_t *wpa,
1438178354Ssam	const uint8_t *rsn, uint16_t capinfo)
1439178354Ssam{
1440178354Ssam	struct ieee80211vap *vap = ni->ni_vap;
1441178354Ssam	uint8_t reason;
1442178354Ssam	int badwparsn;
1443178354Ssam
1444178354Ssam	ni->ni_flags &= ~(IEEE80211_NODE_WPS|IEEE80211_NODE_TSN);
1445178354Ssam	if (wpa == NULL && rsn == NULL) {
1446178354Ssam		if (vap->iv_flags_ext & IEEE80211_FEXT_WPS) {
1447178354Ssam			/*
1448178354Ssam			 * W-Fi Protected Setup (WPS) permits
1449178354Ssam			 * clients to associate and pass EAPOL frames
1450178354Ssam			 * to establish initial credentials.
1451178354Ssam			 */
1452178354Ssam			ni->ni_flags |= IEEE80211_NODE_WPS;
1453178354Ssam			return 1;
1454178354Ssam		}
1455178354Ssam		if ((vap->iv_flags_ext & IEEE80211_FEXT_TSN) &&
1456178354Ssam		    (capinfo & IEEE80211_CAPINFO_PRIVACY)) {
1457178354Ssam			/*
1458178354Ssam			 * Transitional Security Network.  Permits clients
1459178354Ssam			 * to associate and use WEP while WPA is configured.
1460178354Ssam			 */
1461178354Ssam			ni->ni_flags |= IEEE80211_NODE_TSN;
1462178354Ssam			return 1;
1463178354Ssam		}
1464178354Ssam		IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA,
1465178354Ssam		    wh, NULL, "%s", "no WPA/RSN IE in association request");
1466178354Ssam		vap->iv_stats.is_rx_assoc_badwpaie++;
1467178354Ssam		reason = IEEE80211_REASON_IE_INVALID;
1468178354Ssam		goto bad;
1469178354Ssam	}
1470178354Ssam	/* assert right association security credentials */
1471178354Ssam	badwparsn = 0;			/* NB: to silence compiler */
1472178354Ssam	switch (vap->iv_flags & IEEE80211_F_WPA) {
1473178354Ssam	case IEEE80211_F_WPA1:
1474178354Ssam		badwparsn = (wpa == NULL);
1475178354Ssam		break;
1476178354Ssam	case IEEE80211_F_WPA2:
1477178354Ssam		badwparsn = (rsn == NULL);
1478178354Ssam		break;
1479178354Ssam	case IEEE80211_F_WPA1|IEEE80211_F_WPA2:
1480178354Ssam		badwparsn = (wpa == NULL && rsn == NULL);
1481178354Ssam		break;
1482178354Ssam	}
1483178354Ssam	if (badwparsn) {
1484178354Ssam		IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA,
1485178354Ssam		    wh, NULL,
1486178354Ssam		    "%s", "missing WPA/RSN IE in association request");
1487178354Ssam		vap->iv_stats.is_rx_assoc_badwpaie++;
1488178354Ssam		reason = IEEE80211_REASON_IE_INVALID;
1489178354Ssam		goto bad;
1490178354Ssam	}
1491178354Ssam	/*
1492178354Ssam	 * Parse WPA/RSN information element.
1493178354Ssam	 */
1494178354Ssam	if (wpa != NULL)
1495178354Ssam		reason = ieee80211_parse_wpa(vap, wpa, rsnparms, wh);
1496178354Ssam	else
1497178354Ssam		reason = ieee80211_parse_rsn(vap, rsn, rsnparms, wh);
1498178354Ssam	if (reason != 0) {
1499178354Ssam		/* XXX distinguish WPA/RSN? */
1500178354Ssam		vap->iv_stats.is_rx_assoc_badwpaie++;
1501178354Ssam		goto bad;
1502178354Ssam	}
1503178354Ssam	IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, ni,
1504178354Ssam	    "%s ie: mc %u/%u uc %u/%u key %u caps 0x%x",
1505178354Ssam	    wpa != NULL ? "WPA" : "RSN",
1506178354Ssam	    rsnparms->rsn_mcastcipher, rsnparms->rsn_mcastkeylen,
1507178354Ssam	    rsnparms->rsn_ucastcipher, rsnparms->rsn_ucastkeylen,
1508178354Ssam	    rsnparms->rsn_keymgmt, rsnparms->rsn_caps);
1509178354Ssam
1510178354Ssam	return 1;
1511178354Ssambad:
1512178354Ssam	ieee80211_node_deauth(ni, reason);
1513178354Ssam	return 0;
1514178354Ssam}
1515178354Ssam
1516178354Ssam/* XXX find a better place for definition */
1517178354Ssamstruct l2_update_frame {
1518178354Ssam	struct ether_header eh;
1519178354Ssam	uint8_t dsap;
1520178354Ssam	uint8_t ssap;
1521178354Ssam	uint8_t control;
1522178354Ssam	uint8_t xid[3];
1523178354Ssam}  __packed;
1524178354Ssam
1525178354Ssam/*
1526178354Ssam * Deliver a TGf L2UF frame on behalf of a station.
1527178354Ssam * This primes any bridge when the station is roaming
1528178354Ssam * between ap's on the same wired network.
1529178354Ssam */
1530178354Ssamstatic void
1531178354Ssamieee80211_deliver_l2uf(struct ieee80211_node *ni)
1532178354Ssam{
1533178354Ssam	struct ieee80211vap *vap = ni->ni_vap;
1534178354Ssam	struct ifnet *ifp = vap->iv_ifp;
1535178354Ssam	struct mbuf *m;
1536178354Ssam	struct l2_update_frame *l2uf;
1537178354Ssam	struct ether_header *eh;
1538178354Ssam
1539178354Ssam	m = m_gethdr(M_NOWAIT, MT_DATA);
1540178354Ssam	if (m == NULL) {
1541178354Ssam		IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
1542178354Ssam		    "%s", "no mbuf for l2uf frame");
1543178354Ssam		vap->iv_stats.is_rx_nobuf++;	/* XXX not right */
1544178354Ssam		return;
1545178354Ssam	}
1546178354Ssam	l2uf = mtod(m, struct l2_update_frame *);
1547178354Ssam	eh = &l2uf->eh;
1548178354Ssam	/* dst: Broadcast address */
1549178354Ssam	IEEE80211_ADDR_COPY(eh->ether_dhost, ifp->if_broadcastaddr);
1550178354Ssam	/* src: associated STA */
1551178354Ssam	IEEE80211_ADDR_COPY(eh->ether_shost, ni->ni_macaddr);
1552178354Ssam	eh->ether_type = htons(sizeof(*l2uf) - sizeof(*eh));
1553178354Ssam
1554178354Ssam	l2uf->dsap = 0;
1555178354Ssam	l2uf->ssap = 0;
1556178354Ssam	l2uf->control = 0xf5;
1557178354Ssam	l2uf->xid[0] = 0x81;
1558178354Ssam	l2uf->xid[1] = 0x80;
1559178354Ssam	l2uf->xid[2] = 0x00;
1560178354Ssam
1561178354Ssam	m->m_pkthdr.len = m->m_len = sizeof(*l2uf);
1562178354Ssam	hostap_deliver_data(vap, ni, m);
1563178354Ssam}
1564178354Ssam
1565178354Ssamstatic void
1566178354Ssamratesetmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1567178354Ssam	int reassoc, int resp, const char *tag, int rate)
1568178354Ssam{
1569178354Ssam	IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2,
1570178354Ssam	    "deny %s request, %s rate set mismatch, rate/MCS %d",
1571178354Ssam	    reassoc ? "reassoc" : "assoc", tag, rate & IEEE80211_RATE_VAL);
1572178354Ssam	IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_BASIC_RATE);
1573178354Ssam	ieee80211_node_leave(ni);
1574178354Ssam}
1575178354Ssam
1576178354Ssamstatic void
1577178354Ssamcapinfomismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1578178354Ssam	int reassoc, int resp, const char *tag, int capinfo)
1579178354Ssam{
1580178354Ssam	struct ieee80211vap *vap = ni->ni_vap;
1581178354Ssam
1582178354Ssam	IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2,
1583178354Ssam	    "deny %s request, %s mismatch 0x%x",
1584178354Ssam	    reassoc ? "reassoc" : "assoc", tag, capinfo);
1585178354Ssam	IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_CAPINFO);
1586178354Ssam	ieee80211_node_leave(ni);
1587178354Ssam	vap->iv_stats.is_rx_assoc_capmismatch++;
1588178354Ssam}
1589178354Ssam
1590178354Ssamstatic void
1591178354Ssamhtcapmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1592178354Ssam	int reassoc, int resp)
1593178354Ssam{
1594178354Ssam	IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2,
1595178354Ssam	    "deny %s request, %s missing HT ie", reassoc ? "reassoc" : "assoc");
1596178354Ssam	/* XXX no better code */
1597178354Ssam	IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_OTHER);
1598178354Ssam	ieee80211_node_leave(ni);
1599178354Ssam}
1600178354Ssam
1601178354Ssamstatic void
1602178354Ssamauthalgreject(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1603178354Ssam	int algo, int seq, int status)
1604178354Ssam{
1605178354Ssam	struct ieee80211vap *vap = ni->ni_vap;
1606178354Ssam
1607178354Ssam	IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1608178354Ssam	    wh, NULL, "unsupported alg %d", algo);
1609178354Ssam	vap->iv_stats.is_rx_auth_unsupported++;
1610178354Ssam	ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_AUTH,
1611178354Ssam	    seq | (status << 16));
1612178354Ssam}
1613178354Ssam
1614178354Ssamstatic __inline int
1615178354Ssamishtmixed(const uint8_t *ie)
1616178354Ssam{
1617178354Ssam	const struct ieee80211_ie_htinfo *ht =
1618178354Ssam	    (const struct ieee80211_ie_htinfo *) ie;
1619178354Ssam	return (ht->hi_byte2 & IEEE80211_HTINFO_OPMODE) ==
1620178354Ssam	    IEEE80211_HTINFO_OPMODE_MIXED;
1621178354Ssam}
1622178354Ssam
1623178354Ssamstatic int
1624178354Ssamis11bclient(const uint8_t *rates, const uint8_t *xrates)
1625178354Ssam{
1626178354Ssam	static const uint32_t brates = (1<<2*1)|(1<<2*2)|(1<<11)|(1<<2*11);
1627178354Ssam	int i;
1628178354Ssam
1629178354Ssam	/* NB: the 11b clients we care about will not have xrates */
1630178354Ssam	if (xrates != NULL || rates == NULL)
1631178354Ssam		return 0;
1632178354Ssam	for (i = 0; i < rates[1]; i++) {
1633178354Ssam		int r = rates[2+i] & IEEE80211_RATE_VAL;
1634178354Ssam		if (r > 2*11 || ((1<<r) & brates) == 0)
1635178354Ssam			return 0;
1636178354Ssam	}
1637178354Ssam	return 1;
1638178354Ssam}
1639178354Ssam
1640178354Ssamstatic void
1641178354Ssamhostap_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0,
1642192468Ssam	int subtype, int rssi, int nf)
1643178354Ssam{
1644178354Ssam	struct ieee80211vap *vap = ni->ni_vap;
1645178354Ssam	struct ieee80211com *ic = ni->ni_ic;
1646178354Ssam	struct ieee80211_frame *wh;
1647178354Ssam	uint8_t *frm, *efrm, *sfrm;
1648178354Ssam	uint8_t *ssid, *rates, *xrates, *wpa, *rsn, *wme, *ath, *htcap;
1649178354Ssam	int reassoc, resp;
1650178354Ssam	uint8_t rate;
1651178354Ssam
1652178354Ssam	wh = mtod(m0, struct ieee80211_frame *);
1653178354Ssam	frm = (uint8_t *)&wh[1];
1654178354Ssam	efrm = mtod(m0, uint8_t *) + m0->m_len;
1655178354Ssam	switch (subtype) {
1656178354Ssam	case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1657178354Ssam	case IEEE80211_FC0_SUBTYPE_BEACON: {
1658178354Ssam		struct ieee80211_scanparams scan;
1659178354Ssam		/*
1660178354Ssam		 * We process beacon/probe response frames when scanning;
1661178354Ssam		 * otherwise we check beacon frames for overlapping non-ERP
1662178354Ssam		 * BSS in 11g and/or overlapping legacy BSS when in HT.
1663178354Ssam		 */
1664178354Ssam		if ((ic->ic_flags & IEEE80211_F_SCAN) == 0 &&
1665178354Ssam		    subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) {
1666178354Ssam			vap->iv_stats.is_rx_mgtdiscard++;
1667178354Ssam			return;
1668178354Ssam		}
1669178354Ssam		/* NB: accept off-channel frames */
1670178354Ssam		if (ieee80211_parse_beacon(ni, m0, &scan) &~ IEEE80211_BPARSE_OFFCHAN)
1671178354Ssam			return;
1672178354Ssam		/*
1673178354Ssam		 * Count frame now that we know it's to be processed.
1674178354Ssam		 */
1675178354Ssam		if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1676178354Ssam			vap->iv_stats.is_rx_beacon++;		/* XXX remove */
1677178354Ssam			IEEE80211_NODE_STAT(ni, rx_beacons);
1678178354Ssam		} else
1679178354Ssam			IEEE80211_NODE_STAT(ni, rx_proberesp);
1680178354Ssam		/*
1681178354Ssam		 * If scanning, just pass information to the scan module.
1682178354Ssam		 */
1683178354Ssam		if (ic->ic_flags & IEEE80211_F_SCAN) {
1684178354Ssam			if (scan.status == 0 &&		/* NB: on channel */
1685178354Ssam			    (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN)) {
1686178354Ssam				/*
1687178354Ssam				 * Actively scanning a channel marked passive;
1688178354Ssam				 * send a probe request now that we know there
1689178354Ssam				 * is 802.11 traffic present.
1690178354Ssam				 *
1691178354Ssam				 * XXX check if the beacon we recv'd gives
1692178354Ssam				 * us what we need and suppress the probe req
1693178354Ssam				 */
1694178354Ssam				ieee80211_probe_curchan(vap, 1);
1695178354Ssam				ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1696178354Ssam			}
1697192468Ssam			ieee80211_add_scan(vap, &scan, wh, subtype, rssi, nf);
1698178354Ssam			return;
1699178354Ssam		}
1700178354Ssam		/*
1701178354Ssam		 * Check beacon for overlapping bss w/ non ERP stations.
1702178354Ssam		 * If we detect one and protection is configured but not
1703178354Ssam		 * enabled, enable it and start a timer that'll bring us
1704178354Ssam		 * out if we stop seeing the bss.
1705178354Ssam		 */
1706178354Ssam		if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
1707178354Ssam		    scan.status == 0 &&			/* NB: on-channel */
1708178354Ssam		    ((scan.erp & 0x100) == 0 ||		/* NB: no ERP, 11b sta*/
1709178354Ssam		     (scan.erp & IEEE80211_ERP_NON_ERP_PRESENT))) {
1710178354Ssam			ic->ic_lastnonerp = ticks;
1711178354Ssam			ic->ic_flags_ext |= IEEE80211_FEXT_NONERP_PR;
1712178354Ssam			if (ic->ic_protmode != IEEE80211_PROT_NONE &&
1713178354Ssam			    (ic->ic_flags & IEEE80211_F_USEPROT) == 0) {
1714178354Ssam				IEEE80211_NOTE_FRAME(vap,
1715178354Ssam				    IEEE80211_MSG_ASSOC, wh,
1716178354Ssam				    "non-ERP present on channel %d "
1717178354Ssam				    "(saw erp 0x%x from channel %d), "
1718178354Ssam				    "enable use of protection",
1719178354Ssam				    ic->ic_curchan->ic_ieee,
1720178354Ssam				    scan.erp, scan.chan);
1721178354Ssam				ic->ic_flags |= IEEE80211_F_USEPROT;
1722178354Ssam				ieee80211_notify_erp(ic);
1723178354Ssam			}
1724178354Ssam		}
1725178354Ssam		/*
1726178354Ssam		 * Check beacon for non-HT station on HT channel
1727178354Ssam		 * and update HT BSS occupancy as appropriate.
1728178354Ssam		 */
1729178354Ssam		if (IEEE80211_IS_CHAN_HT(ic->ic_curchan)) {
1730178354Ssam			if (scan.status & IEEE80211_BPARSE_OFFCHAN) {
1731178354Ssam				/*
1732178354Ssam				 * Off control channel; only check frames
1733178354Ssam				 * that come in the extension channel when
1734178354Ssam				 * operating w/ HT40.
1735178354Ssam				 */
1736178354Ssam				if (!IEEE80211_IS_CHAN_HT40(ic->ic_curchan))
1737178354Ssam					break;
1738178354Ssam				if (scan.chan != ic->ic_curchan->ic_extieee)
1739178354Ssam					break;
1740178354Ssam			}
1741178354Ssam			if (scan.htinfo == NULL) {
1742178354Ssam				ieee80211_htprot_update(ic,
1743178354Ssam				    IEEE80211_HTINFO_OPMODE_PROTOPT |
1744178354Ssam				    IEEE80211_HTINFO_NONHT_PRESENT);
1745178354Ssam			} else if (ishtmixed(scan.htinfo)) {
1746178354Ssam				/* XXX? take NONHT_PRESENT from beacon? */
1747178354Ssam				ieee80211_htprot_update(ic,
1748178354Ssam				    IEEE80211_HTINFO_OPMODE_MIXED |
1749178354Ssam				    IEEE80211_HTINFO_NONHT_PRESENT);
1750178354Ssam			}
1751178354Ssam		}
1752178354Ssam		break;
1753178354Ssam	}
1754178354Ssam
1755178354Ssam	case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1756178354Ssam		if (vap->iv_state != IEEE80211_S_RUN) {
1757178354Ssam			vap->iv_stats.is_rx_mgtdiscard++;
1758178354Ssam			return;
1759178354Ssam		}
1760178354Ssam		/*
1761178354Ssam		 * prreq frame format
1762178354Ssam		 *	[tlv] ssid
1763178354Ssam		 *	[tlv] supported rates
1764178354Ssam		 *	[tlv] extended supported rates
1765178354Ssam		 */
1766178354Ssam		ssid = rates = xrates = NULL;
1767178354Ssam		sfrm = frm;
1768178354Ssam		while (efrm - frm > 1) {
1769178354Ssam			IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1770178354Ssam			switch (*frm) {
1771178354Ssam			case IEEE80211_ELEMID_SSID:
1772178354Ssam				ssid = frm;
1773178354Ssam				break;
1774178354Ssam			case IEEE80211_ELEMID_RATES:
1775178354Ssam				rates = frm;
1776178354Ssam				break;
1777178354Ssam			case IEEE80211_ELEMID_XRATES:
1778178354Ssam				xrates = frm;
1779178354Ssam				break;
1780178354Ssam			}
1781178354Ssam			frm += frm[1] + 2;
1782178354Ssam		}
1783178354Ssam		IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
1784178354Ssam		if (xrates != NULL)
1785178354Ssam			IEEE80211_VERIFY_ELEMENT(xrates,
1786178354Ssam				IEEE80211_RATE_MAXSIZE - rates[1], return);
1787178354Ssam		IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
1788178354Ssam		IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return);
1789178354Ssam		if ((vap->iv_flags & IEEE80211_F_HIDESSID) && ssid[1] == 0) {
1790178354Ssam			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1791178354Ssam			    wh, NULL,
1792178354Ssam			    "%s", "no ssid with ssid suppression enabled");
1793178354Ssam			vap->iv_stats.is_rx_ssidmismatch++; /*XXX*/
1794178354Ssam			return;
1795178354Ssam		}
1796178354Ssam
1797178354Ssam		/* XXX find a better class or define it's own */
1798178354Ssam		IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
1799178354Ssam		    "%s", "recv probe req");
1800178354Ssam		/*
1801178354Ssam		 * Some legacy 11b clients cannot hack a complete
1802178354Ssam		 * probe response frame.  When the request includes
1803178354Ssam		 * only a bare-bones rate set, communicate this to
1804178354Ssam		 * the transmit side.
1805178354Ssam		 */
1806178354Ssam		ieee80211_send_proberesp(vap, wh->i_addr2,
1807178354Ssam		    is11bclient(rates, xrates) ? IEEE80211_SEND_LEGACY_11B : 0);
1808178354Ssam		break;
1809178354Ssam
1810178354Ssam	case IEEE80211_FC0_SUBTYPE_AUTH: {
1811178354Ssam		uint16_t algo, seq, status;
1812178354Ssam
1813178354Ssam		if (vap->iv_state != IEEE80211_S_RUN) {
1814178354Ssam			vap->iv_stats.is_rx_mgtdiscard++;
1815178354Ssam			return;
1816178354Ssam		}
1817178354Ssam		if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) {
1818178354Ssam			IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1819178354Ssam			    wh, NULL, "%s", "wrong bssid");
1820178354Ssam			vap->iv_stats.is_rx_wrongbss++;	/*XXX unique stat?*/
1821178354Ssam			return;
1822178354Ssam		}
1823178354Ssam		/*
1824178354Ssam		 * auth frame format
1825178354Ssam		 *	[2] algorithm
1826178354Ssam		 *	[2] sequence
1827178354Ssam		 *	[2] status
1828178354Ssam		 *	[tlv*] challenge
1829178354Ssam		 */
1830178354Ssam		IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return);
1831178354Ssam		algo   = le16toh(*(uint16_t *)frm);
1832178354Ssam		seq    = le16toh(*(uint16_t *)(frm + 2));
1833178354Ssam		status = le16toh(*(uint16_t *)(frm + 4));
1834178354Ssam		IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2,
1835178354Ssam		    "recv auth frame with algorithm %d seq %d", algo, seq);
1836178354Ssam		/*
1837178354Ssam		 * Consult the ACL policy module if setup.
1838178354Ssam		 */
1839178354Ssam		if (vap->iv_acl != NULL &&
1840178354Ssam		    !vap->iv_acl->iac_check(vap, wh->i_addr2)) {
1841178354Ssam			IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1842178354Ssam			    wh, NULL, "%s", "disallowed by ACL");
1843178354Ssam			vap->iv_stats.is_rx_acl++;
1844178354Ssam			ieee80211_send_error(ni, wh->i_addr2,
1845178354Ssam			    IEEE80211_FC0_SUBTYPE_AUTH,
1846178354Ssam			    (seq+1) | (IEEE80211_STATUS_UNSPECIFIED<<16));
1847178354Ssam			return;
1848178354Ssam		}
1849178354Ssam		if (vap->iv_flags & IEEE80211_F_COUNTERM) {
1850178354Ssam			IEEE80211_DISCARD(vap,
1851178354Ssam			    IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO,
1852178354Ssam			    wh, NULL, "%s", "TKIP countermeasures enabled");
1853178354Ssam			vap->iv_stats.is_rx_auth_countermeasures++;
1854178354Ssam			ieee80211_send_error(ni, wh->i_addr2,
1855178354Ssam				IEEE80211_FC0_SUBTYPE_AUTH,
1856178354Ssam				IEEE80211_REASON_MIC_FAILURE);
1857178354Ssam			return;
1858178354Ssam		}
1859178354Ssam		if (algo == IEEE80211_AUTH_ALG_SHARED)
1860192468Ssam			hostap_auth_shared(ni, wh, frm + 6, efrm, rssi, nf,
1861192468Ssam			    seq, status);
1862178354Ssam		else if (algo == IEEE80211_AUTH_ALG_OPEN)
1863192468Ssam			hostap_auth_open(ni, wh, rssi, nf, seq, status);
1864178354Ssam		else if (algo == IEEE80211_AUTH_ALG_LEAP) {
1865178354Ssam			authalgreject(ni, wh, algo,
1866178354Ssam			    seq+1, IEEE80211_STATUS_ALG);
1867178354Ssam			return;
1868178354Ssam		} else {
1869178354Ssam			/*
1870178354Ssam			 * We assume that an unknown algorithm is the result
1871178354Ssam			 * of a decryption failure on a shared key auth frame;
1872178354Ssam			 * return a status code appropriate for that instead
1873178354Ssam			 * of IEEE80211_STATUS_ALG.
1874178354Ssam			 *
1875178354Ssam			 * NB: a seq# of 4 is intentional; the decrypted
1876178354Ssam			 *     frame likely has a bogus seq value.
1877178354Ssam			 */
1878178354Ssam			authalgreject(ni, wh, algo,
1879178354Ssam			    4, IEEE80211_STATUS_CHALLENGE);
1880178354Ssam			return;
1881178354Ssam		}
1882178354Ssam		break;
1883178354Ssam	}
1884178354Ssam
1885178354Ssam	case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
1886178354Ssam	case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: {
1887178354Ssam		uint16_t capinfo, lintval;
1888178354Ssam		struct ieee80211_rsnparms rsnparms;
1889178354Ssam
1890178354Ssam		if (vap->iv_state != IEEE80211_S_RUN) {
1891178354Ssam			vap->iv_stats.is_rx_mgtdiscard++;
1892178354Ssam			return;
1893178354Ssam		}
1894178354Ssam		if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) {
1895178354Ssam			IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1896178354Ssam			    wh, NULL, "%s", "wrong bssid");
1897178354Ssam			vap->iv_stats.is_rx_assoc_bss++;
1898178354Ssam			return;
1899178354Ssam		}
1900178354Ssam		if (subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) {
1901178354Ssam			reassoc = 1;
1902178354Ssam			resp = IEEE80211_FC0_SUBTYPE_REASSOC_RESP;
1903178354Ssam		} else {
1904178354Ssam			reassoc = 0;
1905178354Ssam			resp = IEEE80211_FC0_SUBTYPE_ASSOC_RESP;
1906178354Ssam		}
1907178354Ssam		if (ni == vap->iv_bss) {
1908178354Ssam			IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2,
1909178354Ssam			    "deny %s request, sta not authenticated",
1910178354Ssam			    reassoc ? "reassoc" : "assoc");
1911178354Ssam			ieee80211_send_error(ni, wh->i_addr2,
1912178354Ssam			    IEEE80211_FC0_SUBTYPE_DEAUTH,
1913178354Ssam			    IEEE80211_REASON_ASSOC_NOT_AUTHED);
1914178354Ssam			vap->iv_stats.is_rx_assoc_notauth++;
1915178354Ssam			return;
1916178354Ssam		}
1917178354Ssam
1918178354Ssam		/*
1919178354Ssam		 * asreq frame format
1920178354Ssam		 *	[2] capability information
1921178354Ssam		 *	[2] listen interval
1922178354Ssam		 *	[6*] current AP address (reassoc only)
1923178354Ssam		 *	[tlv] ssid
1924178354Ssam		 *	[tlv] supported rates
1925178354Ssam		 *	[tlv] extended supported rates
1926178354Ssam		 *	[tlv] WPA or RSN
1927178354Ssam		 *	[tlv] HT capabilities
1928178354Ssam		 *	[tlv] Atheros capabilities
1929178354Ssam		 */
1930178354Ssam		IEEE80211_VERIFY_LENGTH(efrm - frm, (reassoc ? 10 : 4), return);
1931178354Ssam		capinfo = le16toh(*(uint16_t *)frm);	frm += 2;
1932178354Ssam		lintval = le16toh(*(uint16_t *)frm);	frm += 2;
1933178354Ssam		if (reassoc)
1934178354Ssam			frm += 6;	/* ignore current AP info */
1935178354Ssam		ssid = rates = xrates = wpa = rsn = wme = ath = htcap = NULL;
1936178354Ssam		sfrm = frm;
1937178354Ssam		while (efrm - frm > 1) {
1938178354Ssam			IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1939178354Ssam			switch (*frm) {
1940178354Ssam			case IEEE80211_ELEMID_SSID:
1941178354Ssam				ssid = frm;
1942178354Ssam				break;
1943178354Ssam			case IEEE80211_ELEMID_RATES:
1944178354Ssam				rates = frm;
1945178354Ssam				break;
1946178354Ssam			case IEEE80211_ELEMID_XRATES:
1947178354Ssam				xrates = frm;
1948178354Ssam				break;
1949178354Ssam			case IEEE80211_ELEMID_RSN:
1950178354Ssam				rsn = frm;
1951178354Ssam				break;
1952178354Ssam			case IEEE80211_ELEMID_HTCAP:
1953178354Ssam				htcap = frm;
1954178354Ssam				break;
1955178354Ssam			case IEEE80211_ELEMID_VENDOR:
1956178354Ssam				if (iswpaoui(frm))
1957178354Ssam					wpa = frm;
1958178354Ssam				else if (iswmeinfo(frm))
1959178354Ssam					wme = frm;
1960190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG
1961178354Ssam				else if (isatherosoui(frm))
1962178354Ssam					ath = frm;
1963190391Ssam#endif
1964178354Ssam				else if (vap->iv_flags_ext & IEEE80211_FEXT_HTCOMPAT) {
1965178354Ssam					if (ishtcapoui(frm) && htcap == NULL)
1966178354Ssam						htcap = frm;
1967178354Ssam				}
1968178354Ssam				break;
1969178354Ssam			}
1970178354Ssam			frm += frm[1] + 2;
1971178354Ssam		}
1972178354Ssam		IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
1973178354Ssam		if (xrates != NULL)
1974178354Ssam			IEEE80211_VERIFY_ELEMENT(xrates,
1975178354Ssam				IEEE80211_RATE_MAXSIZE - rates[1], return);
1976178354Ssam		IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
1977178354Ssam		IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return);
1978178354Ssam		if (htcap != NULL) {
1979178354Ssam			IEEE80211_VERIFY_LENGTH(htcap[1],
1980178354Ssam			     htcap[0] == IEEE80211_ELEMID_VENDOR ?
1981178354Ssam			         4 + sizeof(struct ieee80211_ie_htcap)-2 :
1982178354Ssam			         sizeof(struct ieee80211_ie_htcap)-2,
1983178354Ssam			     return);		/* XXX just NULL out? */
1984178354Ssam		}
1985178354Ssam
1986178354Ssam		if ((vap->iv_flags & IEEE80211_F_WPA) &&
1987178354Ssam		    !wpa_assocreq(ni, &rsnparms, wh, wpa, rsn, capinfo))
1988178354Ssam			return;
1989178354Ssam		/* discard challenge after association */
1990178354Ssam		if (ni->ni_challenge != NULL) {
1991186302Ssam			free(ni->ni_challenge, M_80211_NODE);
1992178354Ssam			ni->ni_challenge = NULL;
1993178354Ssam		}
1994178354Ssam		/* NB: 802.11 spec says to ignore station's privacy bit */
1995178354Ssam		if ((capinfo & IEEE80211_CAPINFO_ESS) == 0) {
1996178354Ssam			capinfomismatch(ni, wh, reassoc, resp,
1997178354Ssam			    "capability", capinfo);
1998178354Ssam			return;
1999178354Ssam		}
2000178354Ssam		/*
2001178354Ssam		 * Disallow re-associate w/ invalid slot time setting.
2002178354Ssam		 */
2003178354Ssam		if (ni->ni_associd != 0 &&
2004178354Ssam		    IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2005178354Ssam		    ((ni->ni_capinfo ^ capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME)) {
2006178354Ssam			capinfomismatch(ni, wh, reassoc, resp,
2007178354Ssam			    "slot time", capinfo);
2008178354Ssam			return;
2009178354Ssam		}
2010178354Ssam		rate = ieee80211_setup_rates(ni, rates, xrates,
2011178354Ssam				IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
2012178354Ssam				IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
2013178354Ssam		if (rate & IEEE80211_RATE_BASIC) {
2014178354Ssam			ratesetmismatch(ni, wh, reassoc, resp, "legacy", rate);
2015178354Ssam			vap->iv_stats.is_rx_assoc_norate++;
2016178354Ssam			return;
2017178354Ssam		}
2018178354Ssam		/*
2019178354Ssam		 * If constrained to 11g-only stations reject an
2020178354Ssam		 * 11b-only station.  We cheat a bit here by looking
2021178354Ssam		 * at the max negotiated xmit rate and assuming anyone
2022178354Ssam		 * with a best rate <24Mb/s is an 11b station.
2023178354Ssam		 */
2024178354Ssam		if ((vap->iv_flags & IEEE80211_F_PUREG) && rate < 48) {
2025178354Ssam			ratesetmismatch(ni, wh, reassoc, resp, "11g", rate);
2026178354Ssam			vap->iv_stats.is_rx_assoc_norate++;
2027178354Ssam			return;
2028178354Ssam		}
2029178354Ssam		/*
2030178354Ssam		 * Do HT rate set handling and setup HT node state.
2031178354Ssam		 */
2032178354Ssam		ni->ni_chan = vap->iv_bss->ni_chan;
2033178354Ssam		if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && htcap != NULL) {
2034178354Ssam			rate = ieee80211_setup_htrates(ni, htcap,
2035178354Ssam				IEEE80211_F_DOFMCS | IEEE80211_F_DONEGO |
2036178354Ssam				IEEE80211_F_DOBRS);
2037178354Ssam			if (rate & IEEE80211_RATE_BASIC) {
2038178354Ssam				ratesetmismatch(ni, wh, reassoc, resp,
2039178354Ssam				    "HT", rate);
2040178354Ssam				vap->iv_stats.is_ht_assoc_norate++;
2041178354Ssam				return;
2042178354Ssam			}
2043183254Ssam			ieee80211_ht_node_init(ni);
2044183254Ssam			ieee80211_ht_updatehtcap(ni, htcap);
2045178354Ssam		} else if (ni->ni_flags & IEEE80211_NODE_HT)
2046178354Ssam			ieee80211_ht_node_cleanup(ni);
2047190579Ssam#ifdef IEEE80211_SUPPORT_SUPERG
2048190579Ssam		else if (ni->ni_ath_flags & IEEE80211_NODE_ATH)
2049190579Ssam			ieee80211_ff_node_cleanup(ni);
2050190579Ssam#endif
2051178354Ssam		/*
2052178354Ssam		 * Allow AMPDU operation only with unencrypted traffic
2053178354Ssam		 * or AES-CCM; the 11n spec only specifies these ciphers
2054178354Ssam		 * so permitting any others is undefined and can lead
2055178354Ssam		 * to interoperability problems.
2056178354Ssam		 */
2057178354Ssam		if ((ni->ni_flags & IEEE80211_NODE_HT) &&
2058178354Ssam		    (((vap->iv_flags & IEEE80211_F_WPA) &&
2059178354Ssam		      rsnparms.rsn_ucastcipher != IEEE80211_CIPHER_AES_CCM) ||
2060178354Ssam		     (vap->iv_flags & (IEEE80211_F_WPA|IEEE80211_F_PRIVACY)) == IEEE80211_F_PRIVACY)) {
2061178354Ssam			IEEE80211_NOTE(vap,
2062178354Ssam			    IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni,
2063178354Ssam			    "disallow HT use because WEP or TKIP requested, "
2064178354Ssam			    "capinfo 0x%x ucastcipher %d", capinfo,
2065178354Ssam			    rsnparms.rsn_ucastcipher);
2066178354Ssam			ieee80211_ht_node_cleanup(ni);
2067178354Ssam			vap->iv_stats.is_ht_assoc_downgrade++;
2068178354Ssam		}
2069178354Ssam		/*
2070178354Ssam		 * If constrained to 11n-only stations reject legacy stations.
2071178354Ssam		 */
2072178354Ssam		if ((vap->iv_flags_ext & IEEE80211_FEXT_PUREN) &&
2073178354Ssam		    (ni->ni_flags & IEEE80211_NODE_HT) == 0) {
2074178354Ssam			htcapmismatch(ni, wh, reassoc, resp);
2075178354Ssam			vap->iv_stats.is_ht_assoc_nohtcap++;
2076178354Ssam			return;
2077178354Ssam		}
2078178354Ssam		IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
2079192468Ssam		ni->ni_noise = nf;
2080178354Ssam		ni->ni_intval = lintval;
2081178354Ssam		ni->ni_capinfo = capinfo;
2082178354Ssam		ni->ni_fhdwell = vap->iv_bss->ni_fhdwell;
2083178354Ssam		ni->ni_fhindex = vap->iv_bss->ni_fhindex;
2084178354Ssam		/*
2085178354Ssam		 * Store the IEs.
2086178354Ssam		 * XXX maybe better to just expand
2087178354Ssam		 */
2088178354Ssam		if (ieee80211_ies_init(&ni->ni_ies, sfrm, efrm - sfrm)) {
2089178354Ssam#define	setie(_ie, _off)	ieee80211_ies_setie(ni->ni_ies, _ie, _off)
2090178354Ssam			if (wpa != NULL)
2091178354Ssam				setie(wpa_ie, wpa - sfrm);
2092178354Ssam			if (rsn != NULL)
2093178354Ssam				setie(rsn_ie, rsn - sfrm);
2094178354Ssam			if (htcap != NULL)
2095178354Ssam				setie(htcap_ie, htcap - sfrm);
2096178354Ssam			if (wme != NULL) {
2097178354Ssam				setie(wme_ie, wme - sfrm);
2098178354Ssam				/*
2099178354Ssam				 * Mark node as capable of QoS.
2100178354Ssam				 */
2101178354Ssam				ni->ni_flags |= IEEE80211_NODE_QOS;
2102178354Ssam			} else
2103178354Ssam				ni->ni_flags &= ~IEEE80211_NODE_QOS;
2104190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG
2105178354Ssam			if (ath != NULL) {
2106178354Ssam				setie(ath_ie, ath - sfrm);
2107178354Ssam				/*
2108178354Ssam				 * Parse ATH station parameters.
2109178354Ssam				 */
2110178354Ssam				ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
2111178354Ssam			} else
2112190391Ssam#endif
2113178354Ssam				ni->ni_ath_flags = 0;
2114178354Ssam#undef setie
2115178354Ssam		} else {
2116178354Ssam			ni->ni_flags &= ~IEEE80211_NODE_QOS;
2117178354Ssam			ni->ni_ath_flags = 0;
2118178354Ssam		}
2119178354Ssam		ieee80211_node_join(ni, resp);
2120178354Ssam		ieee80211_deliver_l2uf(ni);
2121178354Ssam		break;
2122178354Ssam	}
2123178354Ssam
2124178354Ssam	case IEEE80211_FC0_SUBTYPE_DEAUTH:
2125178354Ssam	case IEEE80211_FC0_SUBTYPE_DISASSOC: {
2126178354Ssam		uint16_t reason;
2127178354Ssam
2128178354Ssam		if (vap->iv_state != IEEE80211_S_RUN ||
2129178354Ssam		    /* NB: can happen when in promiscuous mode */
2130178354Ssam		    !IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) {
2131178354Ssam			vap->iv_stats.is_rx_mgtdiscard++;
2132178354Ssam			break;
2133178354Ssam		}
2134178354Ssam		/*
2135178354Ssam		 * deauth/disassoc frame format
2136178354Ssam		 *	[2] reason
2137178354Ssam		 */
2138178354Ssam		IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return);
2139178354Ssam		reason = le16toh(*(uint16_t *)frm);
2140178354Ssam		if (subtype == IEEE80211_FC0_SUBTYPE_DEAUTH) {
2141178354Ssam			vap->iv_stats.is_rx_deauth++;
2142178354Ssam			IEEE80211_NODE_STAT(ni, rx_deauth);
2143178354Ssam		} else {
2144178354Ssam			vap->iv_stats.is_rx_disassoc++;
2145178354Ssam			IEEE80211_NODE_STAT(ni, rx_disassoc);
2146178354Ssam		}
2147178354Ssam		IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni,
2148178354Ssam		    "recv %s (reason %d)", ieee80211_mgt_subtype_name[subtype >>
2149178354Ssam			IEEE80211_FC0_SUBTYPE_SHIFT], reason);
2150178354Ssam		if (ni != vap->iv_bss)
2151178354Ssam			ieee80211_node_leave(ni);
2152178354Ssam		break;
2153178354Ssam	}
2154178354Ssam
2155178354Ssam	case IEEE80211_FC0_SUBTYPE_ACTION:
2156178354Ssam		if (vap->iv_state == IEEE80211_S_RUN) {
2157178354Ssam			if (ieee80211_parse_action(ni, m0) == 0)
2158178354Ssam				ic->ic_recv_action(ni, frm, efrm);
2159178354Ssam		} else
2160178354Ssam			vap->iv_stats.is_rx_mgtdiscard++;
2161178354Ssam		break;
2162178354Ssam
2163178354Ssam	case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2164178354Ssam	case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2165178354Ssam	default:
2166178354Ssam		IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2167178354Ssam		     wh, "mgt", "subtype 0x%x not handled", subtype);
2168178354Ssam		vap->iv_stats.is_rx_badsubtype++;
2169178354Ssam		break;
2170178354Ssam	}
2171178354Ssam}
2172178354Ssam
2173191546Ssamstatic void
2174191546Ssamhostap_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
2175191546Ssam{
2176191546Ssam	switch (subtype) {
2177191546Ssam	case IEEE80211_FC0_SUBTYPE_PS_POLL:
2178191546Ssam		hostap_recv_pspoll(ni, m);
2179191546Ssam		break;
2180191546Ssam	case IEEE80211_FC0_SUBTYPE_BAR:
2181191546Ssam		ieee80211_recv_bar(ni, m);
2182191546Ssam		break;
2183191546Ssam	}
2184191546Ssam}
2185191546Ssam
2186178354Ssam/*
2187178354Ssam * Process a received ps-poll frame.
2188178354Ssam */
2189178354Ssamstatic void
2190178354Ssamhostap_recv_pspoll(struct ieee80211_node *ni, struct mbuf *m0)
2191178354Ssam{
2192178354Ssam	struct ieee80211vap *vap = ni->ni_vap;
2193178354Ssam	struct ieee80211_frame_min *wh;
2194184288Ssam	struct ifnet *ifp;
2195178354Ssam	struct mbuf *m;
2196178354Ssam	uint16_t aid;
2197178354Ssam	int qlen;
2198178354Ssam
2199178354Ssam	wh = mtod(m0, struct ieee80211_frame_min *);
2200178354Ssam	if (ni->ni_associd == 0) {
2201178354Ssam		IEEE80211_DISCARD(vap,
2202178354Ssam		    IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG,
2203178354Ssam		    (struct ieee80211_frame *) wh, NULL,
2204178354Ssam		    "%s", "unassociated station");
2205178354Ssam		vap->iv_stats.is_ps_unassoc++;
2206178354Ssam		IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH,
2207178354Ssam			IEEE80211_REASON_NOT_ASSOCED);
2208178354Ssam		return;
2209178354Ssam	}
2210178354Ssam
2211178354Ssam	aid = le16toh(*(uint16_t *)wh->i_dur);
2212178354Ssam	if (aid != ni->ni_associd) {
2213178354Ssam		IEEE80211_DISCARD(vap,
2214178354Ssam		    IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG,
2215178354Ssam		    (struct ieee80211_frame *) wh, NULL,
2216178354Ssam		    "aid mismatch: sta aid 0x%x poll aid 0x%x",
2217178354Ssam		    ni->ni_associd, aid);
2218178354Ssam		vap->iv_stats.is_ps_badaid++;
2219180837Ssam		/*
2220180837Ssam		 * NB: We used to deauth the station but it turns out
2221180837Ssam		 * the Blackberry Curve 8230 (and perhaps other devices)
2222180837Ssam		 * sometimes send the wrong AID when WME is negotiated.
2223180837Ssam		 * Being more lenient here seems ok as we already check
2224180837Ssam		 * the station is associated and we only return frames
2225180837Ssam		 * queued for the station (i.e. we don't use the AID).
2226180837Ssam		 */
2227178354Ssam		return;
2228178354Ssam	}
2229178354Ssam
2230178354Ssam	/* Okay, take the first queued packet and put it out... */
2231184288Ssam	m = ieee80211_node_psq_dequeue(ni, &qlen);
2232178354Ssam	if (m == NULL) {
2233178354Ssam		IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_POWER, wh->i_addr2,
2234178354Ssam		    "%s", "recv ps-poll, but queue empty");
2235178354Ssam		ieee80211_send_nulldata(ieee80211_ref_node(ni));
2236178354Ssam		vap->iv_stats.is_ps_qempty++;	/* XXX node stat */
2237178354Ssam		if (vap->iv_set_tim != NULL)
2238178354Ssam			vap->iv_set_tim(ni, 0);	/* just in case */
2239178354Ssam		return;
2240178354Ssam	}
2241178354Ssam	/*
2242178354Ssam	 * If there are more packets, set the more packets bit
2243178354Ssam	 * in the packet dispatched to the station; otherwise
2244178354Ssam	 * turn off the TIM bit.
2245178354Ssam	 */
2246178354Ssam	if (qlen != 0) {
2247178354Ssam		IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
2248178354Ssam		    "recv ps-poll, send packet, %u still queued", qlen);
2249178354Ssam		m->m_flags |= M_MORE_DATA;
2250178354Ssam	} else {
2251178354Ssam		IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
2252178354Ssam		    "%s", "recv ps-poll, send packet, queue empty");
2253178354Ssam		if (vap->iv_set_tim != NULL)
2254178354Ssam			vap->iv_set_tim(ni, 0);
2255178354Ssam	}
2256178354Ssam	m->m_flags |= M_PWR_SAV;		/* bypass PS handling */
2257184288Ssam
2258184288Ssam	if (m->m_flags & M_ENCAP)
2259184288Ssam		ifp = vap->iv_ic->ic_ifp;
2260184288Ssam	else
2261184288Ssam		ifp = vap->iv_ifp;
2262178354Ssam	IF_ENQUEUE(&ifp->if_snd, m);
2263178354Ssam	if_start(ifp);
2264178354Ssam}
2265