xref: /freebsd/sys/net80211/ieee80211_hostap.c (revision e1cfcbcb4e72759fea73161c2dc0761c09a8d788)
1b032f27cSSam Leffler /*-
2b032f27cSSam Leffler  * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting
3b032f27cSSam Leffler  * All rights reserved.
4b032f27cSSam Leffler  *
5b032f27cSSam Leffler  * Redistribution and use in source and binary forms, with or without
6b032f27cSSam Leffler  * modification, are permitted provided that the following conditions
7b032f27cSSam Leffler  * are met:
8b032f27cSSam Leffler  * 1. Redistributions of source code must retain the above copyright
9b032f27cSSam Leffler  *    notice, this list of conditions and the following disclaimer.
10b032f27cSSam Leffler  * 2. Redistributions in binary form must reproduce the above copyright
11b032f27cSSam Leffler  *    notice, this list of conditions and the following disclaimer in the
12b032f27cSSam Leffler  *    documentation and/or other materials provided with the distribution.
13b032f27cSSam Leffler  *
14b032f27cSSam Leffler  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15b032f27cSSam Leffler  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16b032f27cSSam Leffler  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17b032f27cSSam Leffler  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18b032f27cSSam Leffler  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19b032f27cSSam Leffler  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20b032f27cSSam Leffler  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21b032f27cSSam Leffler  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22b032f27cSSam Leffler  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23b032f27cSSam Leffler  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24b032f27cSSam Leffler  */
25b032f27cSSam Leffler 
26b032f27cSSam Leffler #include <sys/cdefs.h>
27b032f27cSSam Leffler #ifdef __FreeBSD__
28b032f27cSSam Leffler __FBSDID("$FreeBSD$");
29b032f27cSSam Leffler #endif
30b032f27cSSam Leffler 
31b032f27cSSam Leffler /*
32b032f27cSSam Leffler  * IEEE 802.11 HOSTAP mode support.
33b032f27cSSam Leffler  */
34b032f27cSSam Leffler #include "opt_inet.h"
35b032f27cSSam Leffler #include "opt_wlan.h"
36b032f27cSSam Leffler 
37b032f27cSSam Leffler #include <sys/param.h>
38b032f27cSSam Leffler #include <sys/systm.h>
39b032f27cSSam Leffler #include <sys/mbuf.h>
40b032f27cSSam Leffler #include <sys/malloc.h>
41b032f27cSSam Leffler #include <sys/kernel.h>
42b032f27cSSam Leffler 
43b032f27cSSam Leffler #include <sys/socket.h>
44b032f27cSSam Leffler #include <sys/sockio.h>
45b032f27cSSam Leffler #include <sys/endian.h>
46b032f27cSSam Leffler #include <sys/errno.h>
47b032f27cSSam Leffler #include <sys/proc.h>
48b032f27cSSam Leffler #include <sys/sysctl.h>
49b032f27cSSam Leffler 
50b032f27cSSam Leffler #include <net/if.h>
51b032f27cSSam Leffler #include <net/if_media.h>
52b032f27cSSam Leffler #include <net/if_llc.h>
53b032f27cSSam Leffler #include <net/ethernet.h>
54b032f27cSSam Leffler 
55b032f27cSSam Leffler #include <net/bpf.h>
56b032f27cSSam Leffler 
57b032f27cSSam Leffler #include <net80211/ieee80211_var.h>
58b032f27cSSam Leffler #include <net80211/ieee80211_hostap.h>
59b032f27cSSam Leffler #include <net80211/ieee80211_input.h>
60616190d0SSam Leffler #ifdef IEEE80211_SUPPORT_SUPERG
61616190d0SSam Leffler #include <net80211/ieee80211_superg.h>
62616190d0SSam Leffler #endif
63b032f27cSSam Leffler #include <net80211/ieee80211_wds.h>
64b032f27cSSam Leffler 
65b032f27cSSam Leffler #define	IEEE80211_RATE2MBS(r)	(((r) & IEEE80211_RATE_VAL) / 2)
66b032f27cSSam Leffler 
67b032f27cSSam Leffler static	void hostap_vattach(struct ieee80211vap *);
68b032f27cSSam Leffler static	int hostap_newstate(struct ieee80211vap *, enum ieee80211_state, int);
69b032f27cSSam Leffler static	int hostap_input(struct ieee80211_node *ni, struct mbuf *m,
705463c4a4SSam Leffler 	    int rssi, int nf);
71b032f27cSSam Leffler static void hostap_deliver_data(struct ieee80211vap *,
72b032f27cSSam Leffler 	    struct ieee80211_node *, struct mbuf *);
73b032f27cSSam Leffler static void hostap_recv_mgmt(struct ieee80211_node *, struct mbuf *,
745463c4a4SSam Leffler 	    int subtype, int rssi, int nf);
7549eae5f7SSam Leffler static void hostap_recv_ctl(struct ieee80211_node *, struct mbuf *, int);
76b032f27cSSam Leffler static void hostap_recv_pspoll(struct ieee80211_node *, struct mbuf *);
77b032f27cSSam Leffler 
78b032f27cSSam Leffler void
79b032f27cSSam Leffler ieee80211_hostap_attach(struct ieee80211com *ic)
80b032f27cSSam Leffler {
81b032f27cSSam Leffler 	ic->ic_vattach[IEEE80211_M_HOSTAP] = hostap_vattach;
82b032f27cSSam Leffler }
83b032f27cSSam Leffler 
84b032f27cSSam Leffler void
85b032f27cSSam Leffler ieee80211_hostap_detach(struct ieee80211com *ic)
86b032f27cSSam Leffler {
87b032f27cSSam Leffler }
88b032f27cSSam Leffler 
89b032f27cSSam Leffler static void
90b032f27cSSam Leffler hostap_vdetach(struct ieee80211vap *vap)
91b032f27cSSam Leffler {
92b032f27cSSam Leffler }
93b032f27cSSam Leffler 
94b032f27cSSam Leffler static void
95b032f27cSSam Leffler hostap_vattach(struct ieee80211vap *vap)
96b032f27cSSam Leffler {
97b032f27cSSam Leffler 	vap->iv_newstate = hostap_newstate;
98b032f27cSSam Leffler 	vap->iv_input = hostap_input;
99b032f27cSSam Leffler 	vap->iv_recv_mgmt = hostap_recv_mgmt;
10049eae5f7SSam Leffler 	vap->iv_recv_ctl = hostap_recv_ctl;
101b032f27cSSam Leffler 	vap->iv_opdetach = hostap_vdetach;
102b032f27cSSam Leffler 	vap->iv_deliver_data = hostap_deliver_data;
103b032f27cSSam Leffler }
104b032f27cSSam Leffler 
105b032f27cSSam Leffler static void
106b032f27cSSam Leffler sta_disassoc(void *arg, struct ieee80211_node *ni)
107b032f27cSSam Leffler {
108b032f27cSSam Leffler 	struct ieee80211vap *vap = arg;
109b032f27cSSam Leffler 
110b032f27cSSam Leffler 	if (ni->ni_vap == vap && ni->ni_associd != 0) {
111b032f27cSSam Leffler 		IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DISASSOC,
112b032f27cSSam Leffler 			IEEE80211_REASON_ASSOC_LEAVE);
113b032f27cSSam Leffler 		ieee80211_node_leave(ni);
114b032f27cSSam Leffler 	}
115b032f27cSSam Leffler }
116b032f27cSSam Leffler 
117b032f27cSSam Leffler /*
118b032f27cSSam Leffler  * IEEE80211_M_HOSTAP vap state machine handler.
119b032f27cSSam Leffler  */
120b032f27cSSam Leffler static int
121b032f27cSSam Leffler hostap_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
122b032f27cSSam Leffler {
123b032f27cSSam Leffler 	struct ieee80211com *ic = vap->iv_ic;
124b032f27cSSam Leffler 	enum ieee80211_state ostate;
125b032f27cSSam Leffler 
126b032f27cSSam Leffler 	IEEE80211_LOCK_ASSERT(ic);
127b032f27cSSam Leffler 
128b032f27cSSam Leffler 	ostate = vap->iv_state;
129b032f27cSSam Leffler 	IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
130b032f27cSSam Leffler 	    __func__, ieee80211_state_name[ostate],
131b032f27cSSam Leffler 	    ieee80211_state_name[nstate], arg);
132b032f27cSSam Leffler 	vap->iv_state = nstate;			/* state transition */
133b032f27cSSam Leffler 	if (ostate != IEEE80211_S_SCAN)
134b032f27cSSam Leffler 		ieee80211_cancel_scan(vap);	/* background scan */
135b032f27cSSam Leffler 	switch (nstate) {
136b032f27cSSam Leffler 	case IEEE80211_S_INIT:
137b032f27cSSam Leffler 		switch (ostate) {
138b032f27cSSam Leffler 		case IEEE80211_S_SCAN:
139b032f27cSSam Leffler 			ieee80211_cancel_scan(vap);
140b032f27cSSam Leffler 			break;
141b032f27cSSam Leffler 		case IEEE80211_S_CAC:
142b032f27cSSam Leffler 			ieee80211_dfs_cac_stop(vap);
143b032f27cSSam Leffler 			break;
144b032f27cSSam Leffler 		case IEEE80211_S_RUN:
145b032f27cSSam Leffler 			ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, vap);
146b032f27cSSam Leffler 			break;
147b032f27cSSam Leffler 		default:
148b032f27cSSam Leffler 			break;
149b032f27cSSam Leffler 		}
150b032f27cSSam Leffler 		if (ostate != IEEE80211_S_INIT) {
151b032f27cSSam Leffler 			/* NB: optimize INIT -> INIT case */
152b032f27cSSam Leffler 			ieee80211_reset_bss(vap);
153b032f27cSSam Leffler 		}
154b032f27cSSam Leffler 		if (vap->iv_auth->ia_detach != NULL)
155b032f27cSSam Leffler 			vap->iv_auth->ia_detach(vap);
156b032f27cSSam Leffler 		break;
157b032f27cSSam Leffler 	case IEEE80211_S_SCAN:
158b032f27cSSam Leffler 		switch (ostate) {
159b032f27cSSam Leffler 		case IEEE80211_S_CSA:
160b032f27cSSam Leffler 		case IEEE80211_S_RUN:
161b032f27cSSam Leffler 			ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, vap);
162b032f27cSSam Leffler 			/*
163b032f27cSSam Leffler 			 * Clear overlapping BSS state; the beacon frame
164b032f27cSSam Leffler 			 * will be reconstructed on transition to the RUN
165b032f27cSSam Leffler 			 * state and the timeout routines check if the flag
166b032f27cSSam Leffler 			 * is set before doing anything so this is sufficient.
167b032f27cSSam Leffler 			 */
168b032f27cSSam Leffler 			ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR;
169b032f27cSSam Leffler 			ic->ic_flags_ext &= ~IEEE80211_FEXT_NONHT_PR;
170b032f27cSSam Leffler 			/* fall thru... */
171b032f27cSSam Leffler 		case IEEE80211_S_CAC:
172b032f27cSSam Leffler 			/*
173b032f27cSSam Leffler 			 * NB: We may get here because of a manual channel
174b032f27cSSam Leffler 			 *     change in which case we need to stop CAC
175b032f27cSSam Leffler 			 * XXX no need to stop if ostate RUN but it's ok
176b032f27cSSam Leffler 			 */
177b032f27cSSam Leffler 			ieee80211_dfs_cac_stop(vap);
178b032f27cSSam Leffler 			/* fall thru... */
179b032f27cSSam Leffler 		case IEEE80211_S_INIT:
180b032f27cSSam Leffler 			if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
181b032f27cSSam Leffler 			    !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan)) {
182b032f27cSSam Leffler 				/*
183b032f27cSSam Leffler 				 * Already have a channel; bypass the
184b032f27cSSam Leffler 				 * scan and startup immediately.
185b032f27cSSam Leffler 				 * ieee80211_create_ibss will call back to
186b032f27cSSam Leffler 				 * move us to RUN state.
187b032f27cSSam Leffler 				 */
188b032f27cSSam Leffler 				ieee80211_create_ibss(vap, vap->iv_des_chan);
189b032f27cSSam Leffler 				break;
190b032f27cSSam Leffler 			}
191b032f27cSSam Leffler 			/*
192b032f27cSSam Leffler 			 * Initiate a scan.  We can come here as a result
193b032f27cSSam Leffler 			 * of an IEEE80211_IOC_SCAN_REQ too in which case
194b032f27cSSam Leffler 			 * the vap will be marked with IEEE80211_FEXT_SCANREQ
195b032f27cSSam Leffler 			 * and the scan request parameters will be present
196b032f27cSSam Leffler 			 * in iv_scanreq.  Otherwise we do the default.
197b032f27cSSam Leffler 			 */
198b032f27cSSam Leffler 			if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
199b032f27cSSam Leffler 				ieee80211_check_scan(vap,
200b032f27cSSam Leffler 				    vap->iv_scanreq_flags,
201b032f27cSSam Leffler 				    vap->iv_scanreq_duration,
202b032f27cSSam Leffler 				    vap->iv_scanreq_mindwell,
203b032f27cSSam Leffler 				    vap->iv_scanreq_maxdwell,
204b032f27cSSam Leffler 				    vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
205b032f27cSSam Leffler 				vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
206b032f27cSSam Leffler 			} else
207b032f27cSSam Leffler 				ieee80211_check_scan_current(vap);
208b032f27cSSam Leffler 			break;
209b032f27cSSam Leffler 		case IEEE80211_S_SCAN:
210b032f27cSSam Leffler 			/*
211b032f27cSSam Leffler 			 * A state change requires a reset; scan.
212b032f27cSSam Leffler 			 */
213b032f27cSSam Leffler 			ieee80211_check_scan_current(vap);
214b032f27cSSam Leffler 			break;
215b032f27cSSam Leffler 		default:
216b032f27cSSam Leffler 			break;
217b032f27cSSam Leffler 		}
218b032f27cSSam Leffler 		break;
219b032f27cSSam Leffler 	case IEEE80211_S_CAC:
220b032f27cSSam Leffler 		/*
221b032f27cSSam Leffler 		 * Start CAC on a DFS channel.  We come here when starting
222b032f27cSSam Leffler 		 * a bss on a DFS channel (see ieee80211_create_ibss).
223b032f27cSSam Leffler 		 */
224b032f27cSSam Leffler 		ieee80211_dfs_cac_start(vap);
225b032f27cSSam Leffler 		break;
226b032f27cSSam Leffler 	case IEEE80211_S_RUN:
227b032f27cSSam Leffler 		if (vap->iv_flags & IEEE80211_F_WPA) {
228b032f27cSSam Leffler 			/* XXX validate prerequisites */
229b032f27cSSam Leffler 		}
230b032f27cSSam Leffler 		switch (ostate) {
231b032f27cSSam Leffler 		case IEEE80211_S_INIT:
232b032f27cSSam Leffler 			/*
233b032f27cSSam Leffler 			 * Already have a channel; bypass the
234b032f27cSSam Leffler 			 * scan and startup immediately.
235b032f27cSSam Leffler 			 * Note that ieee80211_create_ibss will call
236b032f27cSSam Leffler 			 * back to do a RUN->RUN state change.
237b032f27cSSam Leffler 			 */
238b032f27cSSam Leffler 			ieee80211_create_ibss(vap,
239b032f27cSSam Leffler 			    ieee80211_ht_adjust_channel(ic,
240b032f27cSSam Leffler 				ic->ic_curchan, vap->iv_flags_ext));
241b032f27cSSam Leffler 			/* NB: iv_bss is changed on return */
242b032f27cSSam Leffler 			break;
243b032f27cSSam Leffler 		case IEEE80211_S_CAC:
244b032f27cSSam Leffler 			/*
245b032f27cSSam Leffler 			 * NB: This is the normal state change when CAC
246b032f27cSSam Leffler 			 * expires and no radar was detected; no need to
247b032f27cSSam Leffler 			 * clear the CAC timer as it's already expired.
248b032f27cSSam Leffler 			 */
249b032f27cSSam Leffler 			/* fall thru... */
250b032f27cSSam Leffler 		case IEEE80211_S_CSA:
251b032f27cSSam Leffler 			/*
252b032f27cSSam Leffler 			 * Update bss node channel to reflect where
253b032f27cSSam Leffler 			 * we landed after CSA.
254b032f27cSSam Leffler 			 */
255b032f27cSSam Leffler 			ieee80211_node_set_chan(vap->iv_bss,
256b032f27cSSam Leffler 			    ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
257b032f27cSSam Leffler 				ieee80211_htchanflags(vap->iv_bss->ni_chan)));
258b032f27cSSam Leffler 			/* XXX bypass debug msgs */
259b032f27cSSam Leffler 			break;
260b032f27cSSam Leffler 		case IEEE80211_S_SCAN:
261b032f27cSSam Leffler 		case IEEE80211_S_RUN:
262b032f27cSSam Leffler #ifdef IEEE80211_DEBUG
263b032f27cSSam Leffler 			if (ieee80211_msg_debug(vap)) {
264b032f27cSSam Leffler 				struct ieee80211_node *ni = vap->iv_bss;
265b032f27cSSam Leffler 				ieee80211_note(vap,
266b032f27cSSam Leffler 				    "synchronized with %s ssid ",
267b032f27cSSam Leffler 				    ether_sprintf(ni->ni_bssid));
268b032f27cSSam Leffler 				ieee80211_print_essid(ni->ni_essid,
269b032f27cSSam Leffler 				    ni->ni_esslen);
270b032f27cSSam Leffler 				/* XXX MCS/HT */
271b032f27cSSam Leffler 				printf(" channel %d start %uMb\n",
272b032f27cSSam Leffler 				    ieee80211_chan2ieee(ic, ic->ic_curchan),
273b032f27cSSam Leffler 				    IEEE80211_RATE2MBS(ni->ni_txrate));
274b032f27cSSam Leffler 			}
275b032f27cSSam Leffler #endif
276b032f27cSSam Leffler 			break;
277b032f27cSSam Leffler 		default:
278b032f27cSSam Leffler 			break;
279b032f27cSSam Leffler 		}
280b032f27cSSam Leffler 		/*
281b032f27cSSam Leffler 		 * Start/stop the authenticator.  We delay until here
282b032f27cSSam Leffler 		 * to allow configuration to happen out of order.
283b032f27cSSam Leffler 		 */
284b032f27cSSam Leffler 		if (vap->iv_auth->ia_attach != NULL) {
285b032f27cSSam Leffler 			/* XXX check failure */
286b032f27cSSam Leffler 			vap->iv_auth->ia_attach(vap);
287b032f27cSSam Leffler 		} else if (vap->iv_auth->ia_detach != NULL) {
288b032f27cSSam Leffler 			vap->iv_auth->ia_detach(vap);
289b032f27cSSam Leffler 		}
290b032f27cSSam Leffler 		ieee80211_node_authorize(vap->iv_bss);
291b032f27cSSam Leffler 		break;
292b032f27cSSam Leffler 	default:
293b032f27cSSam Leffler 		break;
294b032f27cSSam Leffler 	}
295b032f27cSSam Leffler 	return 0;
296b032f27cSSam Leffler }
297b032f27cSSam Leffler 
298b032f27cSSam Leffler static void
299b032f27cSSam Leffler hostap_deliver_data(struct ieee80211vap *vap,
300b032f27cSSam Leffler 	struct ieee80211_node *ni, struct mbuf *m)
301b032f27cSSam Leffler {
302b032f27cSSam Leffler 	struct ether_header *eh = mtod(m, struct ether_header *);
303b032f27cSSam Leffler 	struct ifnet *ifp = vap->iv_ifp;
304b032f27cSSam Leffler 
305e1cfcbcbSSam Leffler 	/* clear driver/net80211 flags before passing up */
306e1cfcbcbSSam Leffler 	m->m_flags &= ~(M_80211_RX | M_MCAST | M_BCAST);
307e1cfcbcbSSam Leffler 
308b032f27cSSam Leffler 	KASSERT(vap->iv_opmode == IEEE80211_M_HOSTAP,
309b032f27cSSam Leffler 	    ("gack, opmode %d", vap->iv_opmode));
310b032f27cSSam Leffler 	/*
311b032f27cSSam Leffler 	 * Do accounting.
312b032f27cSSam Leffler 	 */
313b032f27cSSam Leffler 	ifp->if_ipackets++;
314b032f27cSSam Leffler 	IEEE80211_NODE_STAT(ni, rx_data);
315b032f27cSSam Leffler 	IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len);
316b032f27cSSam Leffler 	if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
317b032f27cSSam Leffler 		m->m_flags |= M_MCAST;		/* XXX M_BCAST? */
318b032f27cSSam Leffler 		IEEE80211_NODE_STAT(ni, rx_mcast);
319b032f27cSSam Leffler 	} else
320b032f27cSSam Leffler 		IEEE80211_NODE_STAT(ni, rx_ucast);
321b032f27cSSam Leffler 
322b032f27cSSam Leffler 	/* perform as a bridge within the AP */
323b032f27cSSam Leffler 	if ((vap->iv_flags & IEEE80211_F_NOBRIDGE) == 0) {
324b032f27cSSam Leffler 		struct mbuf *mcopy = NULL;
325b032f27cSSam Leffler 
326b032f27cSSam Leffler 		if (m->m_flags & M_MCAST) {
32774fdefa7SSam Leffler 			mcopy = m_dup(m, M_DONTWAIT);
328b032f27cSSam Leffler 			if (mcopy == NULL)
329b032f27cSSam Leffler 				ifp->if_oerrors++;
330b032f27cSSam Leffler 			else
331b032f27cSSam Leffler 				mcopy->m_flags |= M_MCAST;
332b032f27cSSam Leffler 		} else {
333b032f27cSSam Leffler 			/*
334b032f27cSSam Leffler 			 * Check if the destination is associated with the
335b032f27cSSam Leffler 			 * same vap and authorized to receive traffic.
336b032f27cSSam Leffler 			 * Beware of traffic destined for the vap itself;
337b032f27cSSam Leffler 			 * sending it will not work; just let it be delivered
338b032f27cSSam Leffler 			 * normally.
339b032f27cSSam Leffler 			 */
340b032f27cSSam Leffler 			struct ieee80211_node *sta = ieee80211_find_vap_node(
341b032f27cSSam Leffler 			     &vap->iv_ic->ic_sta, vap, eh->ether_dhost);
342b032f27cSSam Leffler 			if (sta != NULL) {
343b032f27cSSam Leffler 				if (ieee80211_node_is_authorized(sta)) {
344b032f27cSSam Leffler 					/*
345b032f27cSSam Leffler 					 * Beware of sending to ourself; this
346b032f27cSSam Leffler 					 * needs to happen via the normal
347b032f27cSSam Leffler 					 * input path.
348b032f27cSSam Leffler 					 */
349b032f27cSSam Leffler 					if (sta != vap->iv_bss) {
350b032f27cSSam Leffler 						mcopy = m;
351b032f27cSSam Leffler 						m = NULL;
352b032f27cSSam Leffler 					}
353b032f27cSSam Leffler 				} else {
354b032f27cSSam Leffler 					vap->iv_stats.is_rx_unauth++;
355b032f27cSSam Leffler 					IEEE80211_NODE_STAT(sta, rx_unauth);
356b032f27cSSam Leffler 				}
357b032f27cSSam Leffler 				ieee80211_free_node(sta);
358b032f27cSSam Leffler 			}
359b032f27cSSam Leffler 		}
360b032f27cSSam Leffler 		if (mcopy != NULL) {
361b032f27cSSam Leffler 			int len, err;
362b032f27cSSam Leffler 			len = mcopy->m_pkthdr.len;
36372fecb4dSSam Leffler 			err = ifp->if_transmit(ifp, mcopy);
364b032f27cSSam Leffler 			if (err) {
365b032f27cSSam Leffler 				/* NB: IFQ_HANDOFF reclaims mcopy */
366b032f27cSSam Leffler 			} else {
367b032f27cSSam Leffler 				ifp->if_opackets++;
368b032f27cSSam Leffler 			}
369b032f27cSSam Leffler 		}
370b032f27cSSam Leffler 	}
371b032f27cSSam Leffler 	if (m != NULL) {
372b032f27cSSam Leffler 		/*
373b032f27cSSam Leffler 		 * Mark frame as coming from vap's interface.
374b032f27cSSam Leffler 		 */
375b032f27cSSam Leffler 		m->m_pkthdr.rcvif = ifp;
376b032f27cSSam Leffler 		if (m->m_flags & M_MCAST) {
377b032f27cSSam Leffler 			/*
378b032f27cSSam Leffler 			 * Spam DWDS vap's w/ multicast traffic.
379b032f27cSSam Leffler 			 */
380b032f27cSSam Leffler 			/* XXX only if dwds in use? */
381b032f27cSSam Leffler 			ieee80211_dwds_mcast(vap, m);
382b032f27cSSam Leffler 		}
383b032f27cSSam Leffler 		if (ni->ni_vlan != 0) {
384b032f27cSSam Leffler 			/* attach vlan tag */
385b032f27cSSam Leffler 			m->m_pkthdr.ether_vtag = ni->ni_vlan;
386b032f27cSSam Leffler 			m->m_flags |= M_VLANTAG;
387b032f27cSSam Leffler 		}
388b032f27cSSam Leffler 		ifp->if_input(ifp, m);
389b032f27cSSam Leffler 	}
390b032f27cSSam Leffler }
391b032f27cSSam Leffler 
392b032f27cSSam Leffler /*
393b032f27cSSam Leffler  * Decide if a received management frame should be
394b032f27cSSam Leffler  * printed when debugging is enabled.  This filters some
395b032f27cSSam Leffler  * of the less interesting frames that come frequently
396b032f27cSSam Leffler  * (e.g. beacons).
397b032f27cSSam Leffler  */
398b032f27cSSam Leffler static __inline int
399b032f27cSSam Leffler doprint(struct ieee80211vap *vap, int subtype)
400b032f27cSSam Leffler {
401b032f27cSSam Leffler 	switch (subtype) {
402b032f27cSSam Leffler 	case IEEE80211_FC0_SUBTYPE_BEACON:
403b032f27cSSam Leffler 		return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN);
404b032f27cSSam Leffler 	case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
405b032f27cSSam Leffler 		return 0;
406b032f27cSSam Leffler 	}
407b032f27cSSam Leffler 	return 1;
408b032f27cSSam Leffler }
409b032f27cSSam Leffler 
410b032f27cSSam Leffler /*
411b032f27cSSam Leffler  * Process a received frame.  The node associated with the sender
412b032f27cSSam Leffler  * should be supplied.  If nothing was found in the node table then
413b032f27cSSam Leffler  * the caller is assumed to supply a reference to iv_bss instead.
414b032f27cSSam Leffler  * The RSSI and a timestamp are also supplied.  The RSSI data is used
415b032f27cSSam Leffler  * during AP scanning to select a AP to associate with; it can have
416b032f27cSSam Leffler  * any units so long as values have consistent units and higher values
417b032f27cSSam Leffler  * mean ``better signal''.  The receive timestamp is currently not used
418b032f27cSSam Leffler  * by the 802.11 layer.
419b032f27cSSam Leffler  */
420b032f27cSSam Leffler static int
4215463c4a4SSam Leffler hostap_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf)
422b032f27cSSam Leffler {
423b032f27cSSam Leffler #define	SEQ_LEQ(a,b)	((int)((a)-(b)) <= 0)
424b032f27cSSam Leffler #define	HAS_SEQ(type)	((type & 0x4) == 0)
425b032f27cSSam Leffler 	struct ieee80211vap *vap = ni->ni_vap;
426b032f27cSSam Leffler 	struct ieee80211com *ic = ni->ni_ic;
427b032f27cSSam Leffler 	struct ifnet *ifp = vap->iv_ifp;
428b032f27cSSam Leffler 	struct ieee80211_frame *wh;
429b032f27cSSam Leffler 	struct ieee80211_key *key;
430b032f27cSSam Leffler 	struct ether_header *eh;
431b032f27cSSam Leffler 	int hdrspace, need_tap;
432b032f27cSSam Leffler 	uint8_t dir, type, subtype, qos;
433b032f27cSSam Leffler 	uint8_t *bssid;
434b032f27cSSam Leffler 	uint16_t rxseq;
435b032f27cSSam Leffler 
43645f856e3SSam Leffler 	if (m->m_flags & M_AMPDU_MPDU) {
437b032f27cSSam Leffler 		/*
438b032f27cSSam Leffler 		 * Fastpath for A-MPDU reorder q resubmission.  Frames
43945f856e3SSam Leffler 		 * w/ M_AMPDU_MPDU marked have already passed through
44045f856e3SSam Leffler 		 * here but were received out of order and been held on
44145f856e3SSam Leffler 		 * the reorder queue.  When resubmitted they are marked
44245f856e3SSam Leffler 		 * with the M_AMPDU_MPDU flag and we can bypass most of
44345f856e3SSam Leffler 		 * the normal processing.
444b032f27cSSam Leffler 		 */
445b032f27cSSam Leffler 		wh = mtod(m, struct ieee80211_frame *);
446b032f27cSSam Leffler 		type = IEEE80211_FC0_TYPE_DATA;
447b032f27cSSam Leffler 		dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
448b032f27cSSam Leffler 		subtype = IEEE80211_FC0_SUBTYPE_QOS;
449b032f27cSSam Leffler 		hdrspace = ieee80211_hdrspace(ic, wh);	/* XXX optimize? */
450b032f27cSSam Leffler 		goto resubmit_ampdu;
451b032f27cSSam Leffler 	}
452b032f27cSSam Leffler 
453b032f27cSSam Leffler 	KASSERT(ni != NULL, ("null node"));
454b032f27cSSam Leffler 	ni->ni_inact = ni->ni_inact_reload;
455b032f27cSSam Leffler 
456b032f27cSSam Leffler 	need_tap = 1;			/* mbuf need to be tapped. */
457b032f27cSSam Leffler 	type = -1;			/* undefined */
458b032f27cSSam Leffler 
459b032f27cSSam Leffler 	if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
460b032f27cSSam Leffler 		IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
461b032f27cSSam Leffler 		    ni->ni_macaddr, NULL,
462b032f27cSSam Leffler 		    "too short (1): len %u", m->m_pkthdr.len);
463b032f27cSSam Leffler 		vap->iv_stats.is_rx_tooshort++;
464b032f27cSSam Leffler 		goto out;
465b032f27cSSam Leffler 	}
466b032f27cSSam Leffler 	/*
467b032f27cSSam Leffler 	 * Bit of a cheat here, we use a pointer for a 3-address
468b032f27cSSam Leffler 	 * frame format but don't reference fields past outside
469b032f27cSSam Leffler 	 * ieee80211_frame_min w/o first validating the data is
470b032f27cSSam Leffler 	 * present.
471b032f27cSSam Leffler 	 */
472b032f27cSSam Leffler 	wh = mtod(m, struct ieee80211_frame *);
473b032f27cSSam Leffler 
474b032f27cSSam Leffler 	if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
475b032f27cSSam Leffler 	    IEEE80211_FC0_VERSION_0) {
476b032f27cSSam Leffler 		IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
477dc7bf546SSam Leffler 		    ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x",
478dc7bf546SSam Leffler 		    wh->i_fc[0], wh->i_fc[1]);
479b032f27cSSam Leffler 		vap->iv_stats.is_rx_badversion++;
480b032f27cSSam Leffler 		goto err;
481b032f27cSSam Leffler 	}
482b032f27cSSam Leffler 
483b032f27cSSam Leffler 	dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
484b032f27cSSam Leffler 	type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
485b032f27cSSam Leffler 	subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
486b032f27cSSam Leffler 	if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
487b032f27cSSam Leffler 		if (dir != IEEE80211_FC1_DIR_NODS)
488b032f27cSSam Leffler 			bssid = wh->i_addr1;
489b032f27cSSam Leffler 		else if (type == IEEE80211_FC0_TYPE_CTL)
490b032f27cSSam Leffler 			bssid = wh->i_addr1;
491b032f27cSSam Leffler 		else {
492b032f27cSSam Leffler 			if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
493b032f27cSSam Leffler 				IEEE80211_DISCARD_MAC(vap,
494b032f27cSSam Leffler 				    IEEE80211_MSG_ANY, ni->ni_macaddr,
495b032f27cSSam Leffler 				    NULL, "too short (2): len %u",
496b032f27cSSam Leffler 				    m->m_pkthdr.len);
497b032f27cSSam Leffler 				vap->iv_stats.is_rx_tooshort++;
498b032f27cSSam Leffler 				goto out;
499b032f27cSSam Leffler 			}
500b032f27cSSam Leffler 			bssid = wh->i_addr3;
501b032f27cSSam Leffler 		}
502b032f27cSSam Leffler 		/*
503b032f27cSSam Leffler 		 * Validate the bssid.
504b032f27cSSam Leffler 		 */
505b032f27cSSam Leffler 		if (!(type == IEEE80211_FC0_TYPE_MGT &&
506b032f27cSSam Leffler 		      subtype == IEEE80211_FC0_SUBTYPE_BEACON) &&
507b032f27cSSam Leffler 		    !IEEE80211_ADDR_EQ(bssid, vap->iv_bss->ni_bssid) &&
508b032f27cSSam Leffler 		    !IEEE80211_ADDR_EQ(bssid, ifp->if_broadcastaddr)) {
509b032f27cSSam Leffler 			/* not interested in */
510b032f27cSSam Leffler 			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
511b032f27cSSam Leffler 			    bssid, NULL, "%s", "not to bss");
512b032f27cSSam Leffler 			vap->iv_stats.is_rx_wrongbss++;
513b032f27cSSam Leffler 			goto out;
514b032f27cSSam Leffler 		}
515b032f27cSSam Leffler 
516b032f27cSSam Leffler 		IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
5175463c4a4SSam Leffler 		ni->ni_noise = nf;
518b032f27cSSam Leffler 		if (HAS_SEQ(type)) {
519b032f27cSSam Leffler 			uint8_t tid = ieee80211_gettid(wh);
520b032f27cSSam Leffler 			if (IEEE80211_QOS_HAS_SEQ(wh) &&
521b032f27cSSam Leffler 			    TID_TO_WME_AC(tid) >= WME_AC_VI)
522b032f27cSSam Leffler 				ic->ic_wme.wme_hipri_traffic++;
523b032f27cSSam Leffler 			rxseq = le16toh(*(uint16_t *)wh->i_seq);
524b032f27cSSam Leffler 			if ((ni->ni_flags & IEEE80211_NODE_HT) == 0 &&
525b032f27cSSam Leffler 			    (wh->i_fc[1] & IEEE80211_FC1_RETRY) &&
526b032f27cSSam Leffler 			    SEQ_LEQ(rxseq, ni->ni_rxseqs[tid])) {
527b032f27cSSam Leffler 				/* duplicate, discard */
528b032f27cSSam Leffler 				IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
529b032f27cSSam Leffler 				    bssid, "duplicate",
530b032f27cSSam Leffler 				    "seqno <%u,%u> fragno <%u,%u> tid %u",
531b032f27cSSam Leffler 				    rxseq >> IEEE80211_SEQ_SEQ_SHIFT,
532b032f27cSSam Leffler 				    ni->ni_rxseqs[tid] >>
533b032f27cSSam Leffler 					IEEE80211_SEQ_SEQ_SHIFT,
534b032f27cSSam Leffler 				    rxseq & IEEE80211_SEQ_FRAG_MASK,
535b032f27cSSam Leffler 				    ni->ni_rxseqs[tid] &
536b032f27cSSam Leffler 					IEEE80211_SEQ_FRAG_MASK,
537b032f27cSSam Leffler 				    tid);
538b032f27cSSam Leffler 				vap->iv_stats.is_rx_dup++;
539b032f27cSSam Leffler 				IEEE80211_NODE_STAT(ni, rx_dup);
540b032f27cSSam Leffler 				goto out;
541b032f27cSSam Leffler 			}
542b032f27cSSam Leffler 			ni->ni_rxseqs[tid] = rxseq;
543b032f27cSSam Leffler 		}
544b032f27cSSam Leffler 	}
545b032f27cSSam Leffler 
546b032f27cSSam Leffler 	switch (type) {
547b032f27cSSam Leffler 	case IEEE80211_FC0_TYPE_DATA:
548b032f27cSSam Leffler 		hdrspace = ieee80211_hdrspace(ic, wh);
549b032f27cSSam Leffler 		if (m->m_len < hdrspace &&
550b032f27cSSam Leffler 		    (m = m_pullup(m, hdrspace)) == NULL) {
551b032f27cSSam Leffler 			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
552b032f27cSSam Leffler 			    ni->ni_macaddr, NULL,
553b032f27cSSam Leffler 			    "data too short: expecting %u", hdrspace);
554b032f27cSSam Leffler 			vap->iv_stats.is_rx_tooshort++;
555b032f27cSSam Leffler 			goto out;		/* XXX */
556b032f27cSSam Leffler 		}
557b032f27cSSam Leffler 		if (!(dir == IEEE80211_FC1_DIR_TODS ||
558b032f27cSSam Leffler 		     (dir == IEEE80211_FC1_DIR_DSTODS &&
559b032f27cSSam Leffler 		      (vap->iv_flags & IEEE80211_F_DWDS)))) {
560b032f27cSSam Leffler 			if (dir != IEEE80211_FC1_DIR_DSTODS) {
561b032f27cSSam Leffler 				IEEE80211_DISCARD(vap,
562b032f27cSSam Leffler 				    IEEE80211_MSG_INPUT, wh, "data",
563b032f27cSSam Leffler 				    "incorrect dir 0x%x", dir);
564b032f27cSSam Leffler 			} else {
565b032f27cSSam Leffler 				IEEE80211_DISCARD(vap,
566b032f27cSSam Leffler 				    IEEE80211_MSG_INPUT |
567b032f27cSSam Leffler 				    IEEE80211_MSG_WDS, wh,
568b032f27cSSam Leffler 				    "4-address data",
569b032f27cSSam Leffler 				    "%s", "DWDS not enabled");
570b032f27cSSam Leffler 			}
571b032f27cSSam Leffler 			vap->iv_stats.is_rx_wrongdir++;
572b032f27cSSam Leffler 			goto out;
573b032f27cSSam Leffler 		}
574b032f27cSSam Leffler 		/* check if source STA is associated */
575b032f27cSSam Leffler 		if (ni == vap->iv_bss) {
576b032f27cSSam Leffler 			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
577b032f27cSSam Leffler 			    wh, "data", "%s", "unknown src");
578b032f27cSSam Leffler 			ieee80211_send_error(ni, wh->i_addr2,
579b032f27cSSam Leffler 			    IEEE80211_FC0_SUBTYPE_DEAUTH,
580b032f27cSSam Leffler 			    IEEE80211_REASON_NOT_AUTHED);
581b032f27cSSam Leffler 			vap->iv_stats.is_rx_notassoc++;
582b032f27cSSam Leffler 			goto err;
583b032f27cSSam Leffler 		}
584b032f27cSSam Leffler 		if (ni->ni_associd == 0) {
585b032f27cSSam Leffler 			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
586b032f27cSSam Leffler 			    wh, "data", "%s", "unassoc src");
587b032f27cSSam Leffler 			IEEE80211_SEND_MGMT(ni,
588b032f27cSSam Leffler 			    IEEE80211_FC0_SUBTYPE_DISASSOC,
589b032f27cSSam Leffler 			    IEEE80211_REASON_NOT_ASSOCED);
590b032f27cSSam Leffler 			vap->iv_stats.is_rx_notassoc++;
591b032f27cSSam Leffler 			goto err;
592b032f27cSSam Leffler 		}
593b032f27cSSam Leffler 
594b032f27cSSam Leffler 		/*
595b032f27cSSam Leffler 		 * Check for power save state change.
596b032f27cSSam Leffler 		 * XXX out-of-order A-MPDU frames?
597b032f27cSSam Leffler 		 */
598b032f27cSSam Leffler 		if (((wh->i_fc[1] & IEEE80211_FC1_PWR_MGT) ^
599b032f27cSSam Leffler 		    (ni->ni_flags & IEEE80211_NODE_PWR_MGT)))
600b032f27cSSam Leffler 			ieee80211_node_pwrsave(ni,
601b032f27cSSam Leffler 				wh->i_fc[1] & IEEE80211_FC1_PWR_MGT);
602b032f27cSSam Leffler 		/*
603b032f27cSSam Leffler 		 * For 4-address packets handle WDS discovery
604b032f27cSSam Leffler 		 * notifications.  Once a WDS link is setup frames
605b032f27cSSam Leffler 		 * are just delivered to the WDS vap (see below).
606b032f27cSSam Leffler 		 */
607b032f27cSSam Leffler 		if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap == NULL) {
608b032f27cSSam Leffler 			if (!ieee80211_node_is_authorized(ni)) {
609b032f27cSSam Leffler 				IEEE80211_DISCARD(vap,
610b032f27cSSam Leffler 				    IEEE80211_MSG_INPUT |
611b032f27cSSam Leffler 				    IEEE80211_MSG_WDS, wh,
612b032f27cSSam Leffler 				    "4-address data",
613b032f27cSSam Leffler 				    "%s", "unauthorized port");
614b032f27cSSam Leffler 				vap->iv_stats.is_rx_unauth++;
615b032f27cSSam Leffler 				IEEE80211_NODE_STAT(ni, rx_unauth);
616b032f27cSSam Leffler 				goto err;
617b032f27cSSam Leffler 			}
618b032f27cSSam Leffler 			ieee80211_dwds_discover(ni, m);
619b032f27cSSam Leffler 			return type;
620b032f27cSSam Leffler 		}
621b032f27cSSam Leffler 
622b032f27cSSam Leffler 		/*
62345f856e3SSam Leffler 		 * Handle A-MPDU re-ordering.  If the frame is to be
62445f856e3SSam Leffler 		 * processed directly then ieee80211_ampdu_reorder
625b032f27cSSam Leffler 		 * will return 0; otherwise it has consumed the mbuf
626b032f27cSSam Leffler 		 * and we should do nothing more with it.
627b032f27cSSam Leffler 		 */
62845f856e3SSam Leffler 		if ((m->m_flags & M_AMPDU) &&
629b032f27cSSam Leffler 		    ieee80211_ampdu_reorder(ni, m) != 0) {
630b032f27cSSam Leffler 			m = NULL;
631b032f27cSSam Leffler 			goto out;
632b032f27cSSam Leffler 		}
633b032f27cSSam Leffler 	resubmit_ampdu:
634b032f27cSSam Leffler 
635b032f27cSSam Leffler 		/*
636b032f27cSSam Leffler 		 * Handle privacy requirements.  Note that we
637b032f27cSSam Leffler 		 * must not be preempted from here until after
638b032f27cSSam Leffler 		 * we (potentially) call ieee80211_crypto_demic;
639b032f27cSSam Leffler 		 * otherwise we may violate assumptions in the
640b032f27cSSam Leffler 		 * crypto cipher modules used to do delayed update
641b032f27cSSam Leffler 		 * of replay sequence numbers.
642b032f27cSSam Leffler 		 */
643b032f27cSSam Leffler 		if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
644b032f27cSSam Leffler 			if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
645b032f27cSSam Leffler 				/*
646b032f27cSSam Leffler 				 * Discard encrypted frames when privacy is off.
647b032f27cSSam Leffler 				 */
648b032f27cSSam Leffler 				IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
649b032f27cSSam Leffler 				    wh, "WEP", "%s", "PRIVACY off");
650b032f27cSSam Leffler 				vap->iv_stats.is_rx_noprivacy++;
651b032f27cSSam Leffler 				IEEE80211_NODE_STAT(ni, rx_noprivacy);
652b032f27cSSam Leffler 				goto out;
653b032f27cSSam Leffler 			}
654b032f27cSSam Leffler 			key = ieee80211_crypto_decap(ni, m, hdrspace);
655b032f27cSSam Leffler 			if (key == NULL) {
656b032f27cSSam Leffler 				/* NB: stats+msgs handled in crypto_decap */
657b032f27cSSam Leffler 				IEEE80211_NODE_STAT(ni, rx_wepfail);
658b032f27cSSam Leffler 				goto out;
659b032f27cSSam Leffler 			}
660b032f27cSSam Leffler 			wh = mtod(m, struct ieee80211_frame *);
661b032f27cSSam Leffler 			wh->i_fc[1] &= ~IEEE80211_FC1_WEP;
662b032f27cSSam Leffler 		} else {
663b032f27cSSam Leffler 			/* XXX M_WEP and IEEE80211_F_PRIVACY */
664b032f27cSSam Leffler 			key = NULL;
665b032f27cSSam Leffler 		}
666b032f27cSSam Leffler 
667b032f27cSSam Leffler 		/*
668b032f27cSSam Leffler 		 * Save QoS bits for use below--before we strip the header.
669b032f27cSSam Leffler 		 */
670b032f27cSSam Leffler 		if (subtype == IEEE80211_FC0_SUBTYPE_QOS) {
671b032f27cSSam Leffler 			qos = (dir == IEEE80211_FC1_DIR_DSTODS) ?
672b032f27cSSam Leffler 			    ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] :
673b032f27cSSam Leffler 			    ((struct ieee80211_qosframe *)wh)->i_qos[0];
674b032f27cSSam Leffler 		} else
675b032f27cSSam Leffler 			qos = 0;
676b032f27cSSam Leffler 
677b032f27cSSam Leffler 		/*
678b032f27cSSam Leffler 		 * Next up, any fragmentation.
679b032f27cSSam Leffler 		 */
680b032f27cSSam Leffler 		if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
681b032f27cSSam Leffler 			m = ieee80211_defrag(ni, m, hdrspace);
682b032f27cSSam Leffler 			if (m == NULL) {
683b032f27cSSam Leffler 				/* Fragment dropped or frame not complete yet */
684b032f27cSSam Leffler 				goto out;
685b032f27cSSam Leffler 			}
686b032f27cSSam Leffler 		}
687b032f27cSSam Leffler 		wh = NULL;		/* no longer valid, catch any uses */
688b032f27cSSam Leffler 
689b032f27cSSam Leffler 		/*
690b032f27cSSam Leffler 		 * Next strip any MSDU crypto bits.
691b032f27cSSam Leffler 		 */
692b032f27cSSam Leffler 		if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) {
693b032f27cSSam Leffler 			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
694b032f27cSSam Leffler 			    ni->ni_macaddr, "data", "%s", "demic error");
695b032f27cSSam Leffler 			vap->iv_stats.is_rx_demicfail++;
696b032f27cSSam Leffler 			IEEE80211_NODE_STAT(ni, rx_demicfail);
697b032f27cSSam Leffler 			goto out;
698b032f27cSSam Leffler 		}
699b032f27cSSam Leffler 		/* copy to listener after decrypt */
7005463c4a4SSam Leffler 		if (ieee80211_radiotap_active_vap(vap))
7015463c4a4SSam Leffler 			ieee80211_radiotap_rx(vap, m);
702b032f27cSSam Leffler 		need_tap = 0;
703b032f27cSSam Leffler 		/*
704b032f27cSSam Leffler 		 * Finally, strip the 802.11 header.
705b032f27cSSam Leffler 		 */
706b032f27cSSam Leffler 		m = ieee80211_decap(vap, m, hdrspace);
707b032f27cSSam Leffler 		if (m == NULL) {
708b032f27cSSam Leffler 			/* XXX mask bit to check for both */
709b032f27cSSam Leffler 			/* don't count Null data frames as errors */
710b032f27cSSam Leffler 			if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
711b032f27cSSam Leffler 			    subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
712b032f27cSSam Leffler 				goto out;
713b032f27cSSam Leffler 			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
714b032f27cSSam Leffler 			    ni->ni_macaddr, "data", "%s", "decap error");
715b032f27cSSam Leffler 			vap->iv_stats.is_rx_decap++;
716b032f27cSSam Leffler 			IEEE80211_NODE_STAT(ni, rx_decap);
717b032f27cSSam Leffler 			goto err;
718b032f27cSSam Leffler 		}
719b032f27cSSam Leffler 		eh = mtod(m, struct ether_header *);
720b032f27cSSam Leffler 		if (!ieee80211_node_is_authorized(ni)) {
721b032f27cSSam Leffler 			/*
722b032f27cSSam Leffler 			 * Deny any non-PAE frames received prior to
723b032f27cSSam Leffler 			 * authorization.  For open/shared-key
724b032f27cSSam Leffler 			 * authentication the port is mark authorized
725b032f27cSSam Leffler 			 * after authentication completes.  For 802.1x
726b032f27cSSam Leffler 			 * the port is not marked authorized by the
727b032f27cSSam Leffler 			 * authenticator until the handshake has completed.
728b032f27cSSam Leffler 			 */
729b032f27cSSam Leffler 			if (eh->ether_type != htons(ETHERTYPE_PAE)) {
730b032f27cSSam Leffler 				IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
731b032f27cSSam Leffler 				    eh->ether_shost, "data",
732b032f27cSSam Leffler 				    "unauthorized port: ether type 0x%x len %u",
733b032f27cSSam Leffler 				    eh->ether_type, m->m_pkthdr.len);
734b032f27cSSam Leffler 				vap->iv_stats.is_rx_unauth++;
735b032f27cSSam Leffler 				IEEE80211_NODE_STAT(ni, rx_unauth);
736b032f27cSSam Leffler 				goto err;
737b032f27cSSam Leffler 			}
738b032f27cSSam Leffler 		} else {
739b032f27cSSam Leffler 			/*
740b032f27cSSam Leffler 			 * When denying unencrypted frames, discard
741b032f27cSSam Leffler 			 * any non-PAE frames received without encryption.
742b032f27cSSam Leffler 			 */
743b032f27cSSam Leffler 			if ((vap->iv_flags & IEEE80211_F_DROPUNENC) &&
744b032f27cSSam Leffler 			    (key == NULL && (m->m_flags & M_WEP) == 0) &&
745b032f27cSSam Leffler 			    eh->ether_type != htons(ETHERTYPE_PAE)) {
746b032f27cSSam Leffler 				/*
747b032f27cSSam Leffler 				 * Drop unencrypted frames.
748b032f27cSSam Leffler 				 */
749b032f27cSSam Leffler 				vap->iv_stats.is_rx_unencrypted++;
750b032f27cSSam Leffler 				IEEE80211_NODE_STAT(ni, rx_unencrypted);
751b032f27cSSam Leffler 				goto out;
752b032f27cSSam Leffler 			}
753b032f27cSSam Leffler 		}
754b032f27cSSam Leffler 		/* XXX require HT? */
755b032f27cSSam Leffler 		if (qos & IEEE80211_QOS_AMSDU) {
756b032f27cSSam Leffler 			m = ieee80211_decap_amsdu(ni, m);
757b032f27cSSam Leffler 			if (m == NULL)
758b032f27cSSam Leffler 				return IEEE80211_FC0_TYPE_DATA;
759616190d0SSam Leffler 		} else {
760616190d0SSam Leffler #ifdef IEEE80211_SUPPORT_SUPERG
761616190d0SSam Leffler 			m = ieee80211_decap_fastframe(vap, ni, m);
762b032f27cSSam Leffler 			if (m == NULL)
763b032f27cSSam Leffler 				return IEEE80211_FC0_TYPE_DATA;
764616190d0SSam Leffler #endif
765b032f27cSSam Leffler 		}
766b032f27cSSam Leffler 		if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap != NULL)
767b032f27cSSam Leffler 			ieee80211_deliver_data(ni->ni_wdsvap, ni, m);
768b032f27cSSam Leffler 		else
769b032f27cSSam Leffler 			hostap_deliver_data(vap, ni, m);
770b032f27cSSam Leffler 		return IEEE80211_FC0_TYPE_DATA;
771b032f27cSSam Leffler 
772b032f27cSSam Leffler 	case IEEE80211_FC0_TYPE_MGT:
773b032f27cSSam Leffler 		vap->iv_stats.is_rx_mgmt++;
774b032f27cSSam Leffler 		IEEE80211_NODE_STAT(ni, rx_mgmt);
775b032f27cSSam Leffler 		if (dir != IEEE80211_FC1_DIR_NODS) {
776b032f27cSSam Leffler 			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
777b032f27cSSam Leffler 			    wh, "mgt", "incorrect dir 0x%x", dir);
778b032f27cSSam Leffler 			vap->iv_stats.is_rx_wrongdir++;
779b032f27cSSam Leffler 			goto err;
780b032f27cSSam Leffler 		}
781b032f27cSSam Leffler 		if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
782b032f27cSSam Leffler 			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
783b032f27cSSam Leffler 			    ni->ni_macaddr, "mgt", "too short: len %u",
784b032f27cSSam Leffler 			    m->m_pkthdr.len);
785b032f27cSSam Leffler 			vap->iv_stats.is_rx_tooshort++;
786b032f27cSSam Leffler 			goto out;
787b032f27cSSam Leffler 		}
788b032f27cSSam Leffler 		if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
789b032f27cSSam Leffler 			/* ensure return frames are unicast */
790b032f27cSSam Leffler 			IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
791b032f27cSSam Leffler 			    wh, NULL, "source is multicast: %s",
792b032f27cSSam Leffler 			    ether_sprintf(wh->i_addr2));
793b032f27cSSam Leffler 			vap->iv_stats.is_rx_mgtdiscard++;	/* XXX stat */
794b032f27cSSam Leffler 			goto out;
795b032f27cSSam Leffler 		}
796b032f27cSSam Leffler #ifdef IEEE80211_DEBUG
797b032f27cSSam Leffler 		if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) ||
798b032f27cSSam Leffler 		    ieee80211_msg_dumppkts(vap)) {
799b032f27cSSam Leffler 			if_printf(ifp, "received %s from %s rssi %d\n",
800b032f27cSSam Leffler 			    ieee80211_mgt_subtype_name[subtype >>
801b032f27cSSam Leffler 				IEEE80211_FC0_SUBTYPE_SHIFT],
802b032f27cSSam Leffler 			    ether_sprintf(wh->i_addr2), rssi);
803b032f27cSSam Leffler 		}
804b032f27cSSam Leffler #endif
805b032f27cSSam Leffler 		if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
806b032f27cSSam Leffler 			if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) {
807b032f27cSSam Leffler 				/*
808b032f27cSSam Leffler 				 * Only shared key auth frames with a challenge
809b032f27cSSam Leffler 				 * should be encrypted, discard all others.
810b032f27cSSam Leffler 				 */
811b032f27cSSam Leffler 				IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
812b032f27cSSam Leffler 				    wh, NULL,
813b032f27cSSam Leffler 				    "%s", "WEP set but not permitted");
814b032f27cSSam Leffler 				vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
815b032f27cSSam Leffler 				goto out;
816b032f27cSSam Leffler 			}
817b032f27cSSam Leffler 			if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
818b032f27cSSam Leffler 				/*
819b032f27cSSam Leffler 				 * Discard encrypted frames when privacy is off.
820b032f27cSSam Leffler 				 */
821b032f27cSSam Leffler 				IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
822b032f27cSSam Leffler 				    wh, NULL, "%s", "WEP set but PRIVACY off");
823b032f27cSSam Leffler 				vap->iv_stats.is_rx_noprivacy++;
824b032f27cSSam Leffler 				goto out;
825b032f27cSSam Leffler 			}
826b032f27cSSam Leffler 			hdrspace = ieee80211_hdrspace(ic, wh);
827b032f27cSSam Leffler 			key = ieee80211_crypto_decap(ni, m, hdrspace);
828b032f27cSSam Leffler 			if (key == NULL) {
829b032f27cSSam Leffler 				/* NB: stats+msgs handled in crypto_decap */
830b032f27cSSam Leffler 				goto out;
831b032f27cSSam Leffler 			}
832b032f27cSSam Leffler 			wh = mtod(m, struct ieee80211_frame *);
833b032f27cSSam Leffler 			wh->i_fc[1] &= ~IEEE80211_FC1_WEP;
834b032f27cSSam Leffler 		}
8355463c4a4SSam Leffler 		vap->iv_recv_mgmt(ni, m, subtype, rssi, nf);
8368bbd3e41SSam Leffler 		goto out;
837b032f27cSSam Leffler 
838b032f27cSSam Leffler 	case IEEE80211_FC0_TYPE_CTL:
839b032f27cSSam Leffler 		vap->iv_stats.is_rx_ctl++;
840b032f27cSSam Leffler 		IEEE80211_NODE_STAT(ni, rx_ctrl);
84149eae5f7SSam Leffler 		vap->iv_recv_ctl(ni, m, subtype);
842b032f27cSSam Leffler 		goto out;
843b032f27cSSam Leffler 	default:
844b032f27cSSam Leffler 		IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
845b032f27cSSam Leffler 		    wh, "bad", "frame type 0x%x", type);
846b032f27cSSam Leffler 		/* should not come here */
847b032f27cSSam Leffler 		break;
848b032f27cSSam Leffler 	}
849b032f27cSSam Leffler err:
850b032f27cSSam Leffler 	ifp->if_ierrors++;
851b032f27cSSam Leffler out:
852b032f27cSSam Leffler 	if (m != NULL) {
853a6c3cf3eSSam Leffler 		if (need_tap && ieee80211_radiotap_active_vap(vap))
8545463c4a4SSam Leffler 			ieee80211_radiotap_rx(vap, m);
855b032f27cSSam Leffler 		m_freem(m);
856b032f27cSSam Leffler 	}
857b032f27cSSam Leffler 	return type;
858b032f27cSSam Leffler #undef SEQ_LEQ
859b032f27cSSam Leffler }
860b032f27cSSam Leffler 
861b032f27cSSam Leffler static void
862b032f27cSSam Leffler hostap_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh,
8635463c4a4SSam Leffler     int rssi, int nf, uint16_t seq, uint16_t status)
864b032f27cSSam Leffler {
865b032f27cSSam Leffler 	struct ieee80211vap *vap = ni->ni_vap;
866b032f27cSSam Leffler 
867b032f27cSSam Leffler 	KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state));
868b032f27cSSam Leffler 
869b032f27cSSam Leffler 	if (ni->ni_authmode == IEEE80211_AUTH_SHARED) {
870b032f27cSSam Leffler 		IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
871b032f27cSSam Leffler 		    ni->ni_macaddr, "open auth",
872b032f27cSSam Leffler 		    "bad sta auth mode %u", ni->ni_authmode);
873b032f27cSSam Leffler 		vap->iv_stats.is_rx_bad_auth++;	/* XXX */
874b032f27cSSam Leffler 		/*
875b032f27cSSam Leffler 		 * Clear any challenge text that may be there if
876b032f27cSSam Leffler 		 * a previous shared key auth failed and then an
877b032f27cSSam Leffler 		 * open auth is attempted.
878b032f27cSSam Leffler 		 */
879b032f27cSSam Leffler 		if (ni->ni_challenge != NULL) {
880e2126decSSam Leffler 			free(ni->ni_challenge, M_80211_NODE);
881b032f27cSSam Leffler 			ni->ni_challenge = NULL;
882b032f27cSSam Leffler 		}
883b032f27cSSam Leffler 		/* XXX hack to workaround calling convention */
884b032f27cSSam Leffler 		ieee80211_send_error(ni, wh->i_addr2,
885b032f27cSSam Leffler 		    IEEE80211_FC0_SUBTYPE_AUTH,
886b032f27cSSam Leffler 		    (seq + 1) | (IEEE80211_STATUS_ALG<<16));
887b032f27cSSam Leffler 		return;
888b032f27cSSam Leffler 	}
889b032f27cSSam Leffler 	if (seq != IEEE80211_AUTH_OPEN_REQUEST) {
890b032f27cSSam Leffler 		vap->iv_stats.is_rx_bad_auth++;
891b032f27cSSam Leffler 		return;
892b032f27cSSam Leffler 	}
893b032f27cSSam Leffler 	/* always accept open authentication requests */
894b032f27cSSam Leffler 	if (ni == vap->iv_bss) {
895b032f27cSSam Leffler 		ni = ieee80211_dup_bss(vap, wh->i_addr2);
896b032f27cSSam Leffler 		if (ni == NULL)
897b032f27cSSam Leffler 			return;
898b032f27cSSam Leffler 	} else if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0)
899b032f27cSSam Leffler 		(void) ieee80211_ref_node(ni);
900b032f27cSSam Leffler 	/*
901b032f27cSSam Leffler 	 * Mark the node as referenced to reflect that it's
902b032f27cSSam Leffler 	 * reference count has been bumped to insure it remains
903b032f27cSSam Leffler 	 * after the transaction completes.
904b032f27cSSam Leffler 	 */
905b032f27cSSam Leffler 	ni->ni_flags |= IEEE80211_NODE_AREF;
9061b999d64SSam Leffler 	/*
90712c290feSSam Leffler 	 * Mark the node as requiring a valid association id
9081b999d64SSam Leffler 	 * before outbound traffic is permitted.
9091b999d64SSam Leffler 	 */
9101b999d64SSam Leffler 	ni->ni_flags |= IEEE80211_NODE_ASSOCID;
911b032f27cSSam Leffler 
912b032f27cSSam Leffler 	if (vap->iv_acl != NULL &&
913b032f27cSSam Leffler 	    vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) {
914b032f27cSSam Leffler 		/*
915b032f27cSSam Leffler 		 * When the ACL policy is set to RADIUS we defer the
916b032f27cSSam Leffler 		 * authorization to a user agent.  Dispatch an event,
917b032f27cSSam Leffler 		 * a subsequent MLME call will decide the fate of the
918b032f27cSSam Leffler 		 * station.  If the user agent is not present then the
919b032f27cSSam Leffler 		 * node will be reclaimed due to inactivity.
920b032f27cSSam Leffler 		 */
921b032f27cSSam Leffler 		IEEE80211_NOTE_MAC(vap,
922b032f27cSSam Leffler 		    IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, ni->ni_macaddr,
923b032f27cSSam Leffler 		    "%s", "station authentication defered (radius acl)");
924b032f27cSSam Leffler 		ieee80211_notify_node_auth(ni);
925b032f27cSSam Leffler 	} else {
926b032f27cSSam Leffler 		IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1);
927b032f27cSSam Leffler 		IEEE80211_NOTE_MAC(vap,
928b032f27cSSam Leffler 		    IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni->ni_macaddr,
929b032f27cSSam Leffler 		    "%s", "station authenticated (open)");
930b032f27cSSam Leffler 		/*
931b032f27cSSam Leffler 		 * When 802.1x is not in use mark the port
932b032f27cSSam Leffler 		 * authorized at this point so traffic can flow.
933b032f27cSSam Leffler 		 */
934b032f27cSSam Leffler 		if (ni->ni_authmode != IEEE80211_AUTH_8021X)
935b032f27cSSam Leffler 			ieee80211_node_authorize(ni);
936b032f27cSSam Leffler 	}
937b032f27cSSam Leffler }
938b032f27cSSam Leffler 
939b032f27cSSam Leffler static void
940b032f27cSSam Leffler hostap_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh,
9415463c4a4SSam Leffler     uint8_t *frm, uint8_t *efrm, int rssi, int nf,
942b032f27cSSam Leffler     uint16_t seq, uint16_t status)
943b032f27cSSam Leffler {
944b032f27cSSam Leffler 	struct ieee80211vap *vap = ni->ni_vap;
945b032f27cSSam Leffler 	uint8_t *challenge;
946b032f27cSSam Leffler 	int allocbs, estatus;
947b032f27cSSam Leffler 
948b032f27cSSam Leffler 	KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state));
949b032f27cSSam Leffler 
950b032f27cSSam Leffler 	/*
951b032f27cSSam Leffler 	 * NB: this can happen as we allow pre-shared key
952b032f27cSSam Leffler 	 * authentication to be enabled w/o wep being turned
953b032f27cSSam Leffler 	 * on so that configuration of these can be done
954b032f27cSSam Leffler 	 * in any order.  It may be better to enforce the
955b032f27cSSam Leffler 	 * ordering in which case this check would just be
956b032f27cSSam Leffler 	 * for sanity/consistency.
957b032f27cSSam Leffler 	 */
958b032f27cSSam Leffler 	if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
959b032f27cSSam Leffler 		IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
960b032f27cSSam Leffler 		    ni->ni_macaddr, "shared key auth",
961b032f27cSSam Leffler 		    "%s", " PRIVACY is disabled");
962b032f27cSSam Leffler 		estatus = IEEE80211_STATUS_ALG;
963b032f27cSSam Leffler 		goto bad;
964b032f27cSSam Leffler 	}
965b032f27cSSam Leffler 	/*
966b032f27cSSam Leffler 	 * Pre-shared key authentication is evil; accept
967b032f27cSSam Leffler 	 * it only if explicitly configured (it is supported
968b032f27cSSam Leffler 	 * mainly for compatibility with clients like Mac OS X).
969b032f27cSSam Leffler 	 */
970b032f27cSSam Leffler 	if (ni->ni_authmode != IEEE80211_AUTH_AUTO &&
971b032f27cSSam Leffler 	    ni->ni_authmode != IEEE80211_AUTH_SHARED) {
972b032f27cSSam Leffler 		IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
973b032f27cSSam Leffler 		    ni->ni_macaddr, "shared key auth",
974b032f27cSSam Leffler 		    "bad sta auth mode %u", ni->ni_authmode);
975b032f27cSSam Leffler 		vap->iv_stats.is_rx_bad_auth++;	/* XXX maybe a unique error? */
976b032f27cSSam Leffler 		estatus = IEEE80211_STATUS_ALG;
977b032f27cSSam Leffler 		goto bad;
978b032f27cSSam Leffler 	}
979b032f27cSSam Leffler 
980b032f27cSSam Leffler 	challenge = NULL;
981b032f27cSSam Leffler 	if (frm + 1 < efrm) {
982b032f27cSSam Leffler 		if ((frm[1] + 2) > (efrm - frm)) {
983b032f27cSSam Leffler 			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
984b032f27cSSam Leffler 			    ni->ni_macaddr, "shared key auth",
985b032f27cSSam Leffler 			    "ie %d/%d too long",
986b032f27cSSam Leffler 			    frm[0], (frm[1] + 2) - (efrm - frm));
987b032f27cSSam Leffler 			vap->iv_stats.is_rx_bad_auth++;
988b032f27cSSam Leffler 			estatus = IEEE80211_STATUS_CHALLENGE;
989b032f27cSSam Leffler 			goto bad;
990b032f27cSSam Leffler 		}
991b032f27cSSam Leffler 		if (*frm == IEEE80211_ELEMID_CHALLENGE)
992b032f27cSSam Leffler 			challenge = frm;
993b032f27cSSam Leffler 		frm += frm[1] + 2;
994b032f27cSSam Leffler 	}
995b032f27cSSam Leffler 	switch (seq) {
996b032f27cSSam Leffler 	case IEEE80211_AUTH_SHARED_CHALLENGE:
997b032f27cSSam Leffler 	case IEEE80211_AUTH_SHARED_RESPONSE:
998b032f27cSSam Leffler 		if (challenge == NULL) {
999b032f27cSSam Leffler 			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1000b032f27cSSam Leffler 			    ni->ni_macaddr, "shared key auth",
1001b032f27cSSam Leffler 			    "%s", "no challenge");
1002b032f27cSSam Leffler 			vap->iv_stats.is_rx_bad_auth++;
1003b032f27cSSam Leffler 			estatus = IEEE80211_STATUS_CHALLENGE;
1004b032f27cSSam Leffler 			goto bad;
1005b032f27cSSam Leffler 		}
1006b032f27cSSam Leffler 		if (challenge[1] != IEEE80211_CHALLENGE_LEN) {
1007b032f27cSSam Leffler 			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1008b032f27cSSam Leffler 			    ni->ni_macaddr, "shared key auth",
1009b032f27cSSam Leffler 			    "bad challenge len %d", challenge[1]);
1010b032f27cSSam Leffler 			vap->iv_stats.is_rx_bad_auth++;
1011b032f27cSSam Leffler 			estatus = IEEE80211_STATUS_CHALLENGE;
1012b032f27cSSam Leffler 			goto bad;
1013b032f27cSSam Leffler 		}
1014b032f27cSSam Leffler 	default:
1015b032f27cSSam Leffler 		break;
1016b032f27cSSam Leffler 	}
1017b032f27cSSam Leffler 	switch (seq) {
1018b032f27cSSam Leffler 	case IEEE80211_AUTH_SHARED_REQUEST:
1019b032f27cSSam Leffler 		if (ni == vap->iv_bss) {
1020b032f27cSSam Leffler 			ni = ieee80211_dup_bss(vap, wh->i_addr2);
1021b032f27cSSam Leffler 			if (ni == NULL) {
1022b032f27cSSam Leffler 				/* NB: no way to return an error */
1023b032f27cSSam Leffler 				return;
1024b032f27cSSam Leffler 			}
1025b032f27cSSam Leffler 			allocbs = 1;
1026b032f27cSSam Leffler 		} else {
1027b032f27cSSam Leffler 			if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0)
1028b032f27cSSam Leffler 				(void) ieee80211_ref_node(ni);
1029b032f27cSSam Leffler 			allocbs = 0;
1030b032f27cSSam Leffler 		}
1031b032f27cSSam Leffler 		/*
1032b032f27cSSam Leffler 		 * Mark the node as referenced to reflect that it's
1033b032f27cSSam Leffler 		 * reference count has been bumped to insure it remains
1034b032f27cSSam Leffler 		 * after the transaction completes.
1035b032f27cSSam Leffler 		 */
1036b032f27cSSam Leffler 		ni->ni_flags |= IEEE80211_NODE_AREF;
10371b999d64SSam Leffler 		/*
10381b999d64SSam Leffler 		 * Mark the node as requiring a valid associatio id
10391b999d64SSam Leffler 		 * before outbound traffic is permitted.
10401b999d64SSam Leffler 		 */
10411b999d64SSam Leffler 		ni->ni_flags |= IEEE80211_NODE_ASSOCID;
1042b032f27cSSam Leffler 		IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
10435463c4a4SSam Leffler 		ni->ni_noise = nf;
1044b032f27cSSam Leffler 		if (!ieee80211_alloc_challenge(ni)) {
1045b032f27cSSam Leffler 			/* NB: don't return error so they rexmit */
1046b032f27cSSam Leffler 			return;
1047b032f27cSSam Leffler 		}
1048b032f27cSSam Leffler 		get_random_bytes(ni->ni_challenge,
1049b032f27cSSam Leffler 			IEEE80211_CHALLENGE_LEN);
1050b032f27cSSam Leffler 		IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH,
1051b032f27cSSam Leffler 		    ni, "shared key %sauth request", allocbs ? "" : "re");
1052b032f27cSSam Leffler 		/*
1053b032f27cSSam Leffler 		 * When the ACL policy is set to RADIUS we defer the
1054b032f27cSSam Leffler 		 * authorization to a user agent.  Dispatch an event,
1055b032f27cSSam Leffler 		 * a subsequent MLME call will decide the fate of the
1056b032f27cSSam Leffler 		 * station.  If the user agent is not present then the
1057b032f27cSSam Leffler 		 * node will be reclaimed due to inactivity.
1058b032f27cSSam Leffler 		 */
1059b032f27cSSam Leffler 		if (vap->iv_acl != NULL &&
1060b032f27cSSam Leffler 		    vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) {
1061b032f27cSSam Leffler 			IEEE80211_NOTE_MAC(vap,
1062b032f27cSSam Leffler 			    IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL,
1063b032f27cSSam Leffler 			    ni->ni_macaddr,
1064b032f27cSSam Leffler 			    "%s", "station authentication defered (radius acl)");
1065b032f27cSSam Leffler 			ieee80211_notify_node_auth(ni);
1066b032f27cSSam Leffler 			return;
1067b032f27cSSam Leffler 		}
1068b032f27cSSam Leffler 		break;
1069b032f27cSSam Leffler 	case IEEE80211_AUTH_SHARED_RESPONSE:
1070b032f27cSSam Leffler 		if (ni == vap->iv_bss) {
1071b032f27cSSam Leffler 			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1072b032f27cSSam Leffler 			    ni->ni_macaddr, "shared key response",
1073b032f27cSSam Leffler 			    "%s", "unknown station");
1074b032f27cSSam Leffler 			/* NB: don't send a response */
1075b032f27cSSam Leffler 			return;
1076b032f27cSSam Leffler 		}
1077b032f27cSSam Leffler 		if (ni->ni_challenge == NULL) {
1078b032f27cSSam Leffler 			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1079b032f27cSSam Leffler 			    ni->ni_macaddr, "shared key response",
1080b032f27cSSam Leffler 			    "%s", "no challenge recorded");
1081b032f27cSSam Leffler 			vap->iv_stats.is_rx_bad_auth++;
1082b032f27cSSam Leffler 			estatus = IEEE80211_STATUS_CHALLENGE;
1083b032f27cSSam Leffler 			goto bad;
1084b032f27cSSam Leffler 		}
1085b032f27cSSam Leffler 		if (memcmp(ni->ni_challenge, &challenge[2],
1086b032f27cSSam Leffler 			   challenge[1]) != 0) {
1087b032f27cSSam Leffler 			IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1088b032f27cSSam Leffler 			    ni->ni_macaddr, "shared key response",
1089b032f27cSSam Leffler 			    "%s", "challenge mismatch");
1090b032f27cSSam Leffler 			vap->iv_stats.is_rx_auth_fail++;
1091b032f27cSSam Leffler 			estatus = IEEE80211_STATUS_CHALLENGE;
1092b032f27cSSam Leffler 			goto bad;
1093b032f27cSSam Leffler 		}
1094b032f27cSSam Leffler 		IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH,
1095b032f27cSSam Leffler 		    ni, "%s", "station authenticated (shared key)");
1096b032f27cSSam Leffler 		ieee80211_node_authorize(ni);
1097b032f27cSSam Leffler 		break;
1098b032f27cSSam Leffler 	default:
1099b032f27cSSam Leffler 		IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1100b032f27cSSam Leffler 		    ni->ni_macaddr, "shared key auth",
1101b032f27cSSam Leffler 		    "bad seq %d", seq);
1102b032f27cSSam Leffler 		vap->iv_stats.is_rx_bad_auth++;
1103b032f27cSSam Leffler 		estatus = IEEE80211_STATUS_SEQUENCE;
1104b032f27cSSam Leffler 		goto bad;
1105b032f27cSSam Leffler 	}
1106b032f27cSSam Leffler 	IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1);
1107b032f27cSSam Leffler 	return;
1108b032f27cSSam Leffler bad:
1109b032f27cSSam Leffler 	/*
1110b032f27cSSam Leffler 	 * Send an error response; but only when operating as an AP.
1111b032f27cSSam Leffler 	 */
1112b032f27cSSam Leffler 	/* XXX hack to workaround calling convention */
1113b032f27cSSam Leffler 	ieee80211_send_error(ni, wh->i_addr2,
1114b032f27cSSam Leffler 	    IEEE80211_FC0_SUBTYPE_AUTH,
1115b032f27cSSam Leffler 	    (seq + 1) | (estatus<<16));
1116b032f27cSSam Leffler }
1117b032f27cSSam Leffler 
1118b032f27cSSam Leffler /*
1119b032f27cSSam Leffler  * Convert a WPA cipher selector OUI to an internal
1120b032f27cSSam Leffler  * cipher algorithm.  Where appropriate we also
1121b032f27cSSam Leffler  * record any key length.
1122b032f27cSSam Leffler  */
1123b032f27cSSam Leffler static int
1124b032f27cSSam Leffler wpa_cipher(const uint8_t *sel, uint8_t *keylen)
1125b032f27cSSam Leffler {
1126b032f27cSSam Leffler #define	WPA_SEL(x)	(((x)<<24)|WPA_OUI)
1127b032f27cSSam Leffler 	uint32_t w = LE_READ_4(sel);
1128b032f27cSSam Leffler 
1129b032f27cSSam Leffler 	switch (w) {
1130b032f27cSSam Leffler 	case WPA_SEL(WPA_CSE_NULL):
1131b032f27cSSam Leffler 		return IEEE80211_CIPHER_NONE;
1132b032f27cSSam Leffler 	case WPA_SEL(WPA_CSE_WEP40):
1133b032f27cSSam Leffler 		if (keylen)
1134b032f27cSSam Leffler 			*keylen = 40 / NBBY;
1135b032f27cSSam Leffler 		return IEEE80211_CIPHER_WEP;
1136b032f27cSSam Leffler 	case WPA_SEL(WPA_CSE_WEP104):
1137b032f27cSSam Leffler 		if (keylen)
1138b032f27cSSam Leffler 			*keylen = 104 / NBBY;
1139b032f27cSSam Leffler 		return IEEE80211_CIPHER_WEP;
1140b032f27cSSam Leffler 	case WPA_SEL(WPA_CSE_TKIP):
1141b032f27cSSam Leffler 		return IEEE80211_CIPHER_TKIP;
1142b032f27cSSam Leffler 	case WPA_SEL(WPA_CSE_CCMP):
1143b032f27cSSam Leffler 		return IEEE80211_CIPHER_AES_CCM;
1144b032f27cSSam Leffler 	}
1145b032f27cSSam Leffler 	return 32;		/* NB: so 1<< is discarded */
1146b032f27cSSam Leffler #undef WPA_SEL
1147b032f27cSSam Leffler }
1148b032f27cSSam Leffler 
1149b032f27cSSam Leffler /*
1150b032f27cSSam Leffler  * Convert a WPA key management/authentication algorithm
1151b032f27cSSam Leffler  * to an internal code.
1152b032f27cSSam Leffler  */
1153b032f27cSSam Leffler static int
1154b032f27cSSam Leffler wpa_keymgmt(const uint8_t *sel)
1155b032f27cSSam Leffler {
1156b032f27cSSam Leffler #define	WPA_SEL(x)	(((x)<<24)|WPA_OUI)
1157b032f27cSSam Leffler 	uint32_t w = LE_READ_4(sel);
1158b032f27cSSam Leffler 
1159b032f27cSSam Leffler 	switch (w) {
1160b032f27cSSam Leffler 	case WPA_SEL(WPA_ASE_8021X_UNSPEC):
1161b032f27cSSam Leffler 		return WPA_ASE_8021X_UNSPEC;
1162b032f27cSSam Leffler 	case WPA_SEL(WPA_ASE_8021X_PSK):
1163b032f27cSSam Leffler 		return WPA_ASE_8021X_PSK;
1164b032f27cSSam Leffler 	case WPA_SEL(WPA_ASE_NONE):
1165b032f27cSSam Leffler 		return WPA_ASE_NONE;
1166b032f27cSSam Leffler 	}
1167b032f27cSSam Leffler 	return 0;		/* NB: so is discarded */
1168b032f27cSSam Leffler #undef WPA_SEL
1169b032f27cSSam Leffler }
1170b032f27cSSam Leffler 
1171b032f27cSSam Leffler /*
1172b032f27cSSam Leffler  * Parse a WPA information element to collect parameters.
1173b032f27cSSam Leffler  * Note that we do not validate security parameters; that
1174b032f27cSSam Leffler  * is handled by the authenticator; the parsing done here
1175b032f27cSSam Leffler  * is just for internal use in making operational decisions.
1176b032f27cSSam Leffler  */
1177b032f27cSSam Leffler static int
1178b032f27cSSam Leffler ieee80211_parse_wpa(struct ieee80211vap *vap, const uint8_t *frm,
1179b032f27cSSam Leffler 	struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh)
1180b032f27cSSam Leffler {
1181b032f27cSSam Leffler 	uint8_t len = frm[1];
1182b032f27cSSam Leffler 	uint32_t w;
1183b032f27cSSam Leffler 	int n;
1184b032f27cSSam Leffler 
1185b032f27cSSam Leffler 	/*
1186b032f27cSSam Leffler 	 * Check the length once for fixed parts: OUI, type,
1187b032f27cSSam Leffler 	 * version, mcast cipher, and 2 selector counts.
1188b032f27cSSam Leffler 	 * Other, variable-length data, must be checked separately.
1189b032f27cSSam Leffler 	 */
1190b032f27cSSam Leffler 	if ((vap->iv_flags & IEEE80211_F_WPA1) == 0) {
1191b032f27cSSam Leffler 		IEEE80211_DISCARD_IE(vap,
1192b032f27cSSam Leffler 		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1193b032f27cSSam Leffler 		    wh, "WPA", "not WPA, flags 0x%x", vap->iv_flags);
1194b032f27cSSam Leffler 		return IEEE80211_REASON_IE_INVALID;
1195b032f27cSSam Leffler 	}
1196b032f27cSSam Leffler 	if (len < 14) {
1197b032f27cSSam Leffler 		IEEE80211_DISCARD_IE(vap,
1198b032f27cSSam Leffler 		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1199b032f27cSSam Leffler 		    wh, "WPA", "too short, len %u", len);
1200b032f27cSSam Leffler 		return IEEE80211_REASON_IE_INVALID;
1201b032f27cSSam Leffler 	}
1202b032f27cSSam Leffler 	frm += 6, len -= 4;		/* NB: len is payload only */
1203b032f27cSSam Leffler 	/* NB: iswapoui already validated the OUI and type */
1204b032f27cSSam Leffler 	w = LE_READ_2(frm);
1205b032f27cSSam Leffler 	if (w != WPA_VERSION) {
1206b032f27cSSam Leffler 		IEEE80211_DISCARD_IE(vap,
1207b032f27cSSam Leffler 		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1208b032f27cSSam Leffler 		    wh, "WPA", "bad version %u", w);
1209b032f27cSSam Leffler 		return IEEE80211_REASON_IE_INVALID;
1210b032f27cSSam Leffler 	}
1211b032f27cSSam Leffler 	frm += 2, len -= 2;
1212b032f27cSSam Leffler 
1213b032f27cSSam Leffler 	memset(rsn, 0, sizeof(*rsn));
1214b032f27cSSam Leffler 
1215b032f27cSSam Leffler 	/* multicast/group cipher */
1216b032f27cSSam Leffler 	rsn->rsn_mcastcipher = wpa_cipher(frm, &rsn->rsn_mcastkeylen);
1217b032f27cSSam Leffler 	frm += 4, len -= 4;
1218b032f27cSSam Leffler 
1219b032f27cSSam Leffler 	/* unicast ciphers */
1220b032f27cSSam Leffler 	n = LE_READ_2(frm);
1221b032f27cSSam Leffler 	frm += 2, len -= 2;
1222b032f27cSSam Leffler 	if (len < n*4+2) {
1223b032f27cSSam Leffler 		IEEE80211_DISCARD_IE(vap,
1224b032f27cSSam Leffler 		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1225b032f27cSSam Leffler 		    wh, "WPA", "ucast cipher data too short; len %u, n %u",
1226b032f27cSSam Leffler 		    len, n);
1227b032f27cSSam Leffler 		return IEEE80211_REASON_IE_INVALID;
1228b032f27cSSam Leffler 	}
1229b032f27cSSam Leffler 	w = 0;
1230b032f27cSSam Leffler 	for (; n > 0; n--) {
1231b032f27cSSam Leffler 		w |= 1<<wpa_cipher(frm, &rsn->rsn_ucastkeylen);
1232b032f27cSSam Leffler 		frm += 4, len -= 4;
1233b032f27cSSam Leffler 	}
1234b032f27cSSam Leffler 	if (w & (1<<IEEE80211_CIPHER_TKIP))
1235b032f27cSSam Leffler 		rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP;
1236b032f27cSSam Leffler 	else
1237b032f27cSSam Leffler 		rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM;
1238b032f27cSSam Leffler 
1239b032f27cSSam Leffler 	/* key management algorithms */
1240b032f27cSSam Leffler 	n = LE_READ_2(frm);
1241b032f27cSSam Leffler 	frm += 2, len -= 2;
1242b032f27cSSam Leffler 	if (len < n*4) {
1243b032f27cSSam Leffler 		IEEE80211_DISCARD_IE(vap,
1244b032f27cSSam Leffler 		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1245b032f27cSSam Leffler 		    wh, "WPA", "key mgmt alg data too short; len %u, n %u",
1246b032f27cSSam Leffler 		    len, n);
1247b032f27cSSam Leffler 		return IEEE80211_REASON_IE_INVALID;
1248b032f27cSSam Leffler 	}
1249b032f27cSSam Leffler 	w = 0;
1250b032f27cSSam Leffler 	for (; n > 0; n--) {
1251b032f27cSSam Leffler 		w |= wpa_keymgmt(frm);
1252b032f27cSSam Leffler 		frm += 4, len -= 4;
1253b032f27cSSam Leffler 	}
1254b032f27cSSam Leffler 	if (w & WPA_ASE_8021X_UNSPEC)
1255b032f27cSSam Leffler 		rsn->rsn_keymgmt = WPA_ASE_8021X_UNSPEC;
1256b032f27cSSam Leffler 	else
1257b032f27cSSam Leffler 		rsn->rsn_keymgmt = WPA_ASE_8021X_PSK;
1258b032f27cSSam Leffler 
1259b032f27cSSam Leffler 	if (len > 2)		/* optional capabilities */
1260b032f27cSSam Leffler 		rsn->rsn_caps = LE_READ_2(frm);
1261b032f27cSSam Leffler 
1262b032f27cSSam Leffler 	return 0;
1263b032f27cSSam Leffler }
1264b032f27cSSam Leffler 
1265b032f27cSSam Leffler /*
1266b032f27cSSam Leffler  * Convert an RSN cipher selector OUI to an internal
1267b032f27cSSam Leffler  * cipher algorithm.  Where appropriate we also
1268b032f27cSSam Leffler  * record any key length.
1269b032f27cSSam Leffler  */
1270b032f27cSSam Leffler static int
1271b032f27cSSam Leffler rsn_cipher(const uint8_t *sel, uint8_t *keylen)
1272b032f27cSSam Leffler {
1273b032f27cSSam Leffler #define	RSN_SEL(x)	(((x)<<24)|RSN_OUI)
1274b032f27cSSam Leffler 	uint32_t w = LE_READ_4(sel);
1275b032f27cSSam Leffler 
1276b032f27cSSam Leffler 	switch (w) {
1277b032f27cSSam Leffler 	case RSN_SEL(RSN_CSE_NULL):
1278b032f27cSSam Leffler 		return IEEE80211_CIPHER_NONE;
1279b032f27cSSam Leffler 	case RSN_SEL(RSN_CSE_WEP40):
1280b032f27cSSam Leffler 		if (keylen)
1281b032f27cSSam Leffler 			*keylen = 40 / NBBY;
1282b032f27cSSam Leffler 		return IEEE80211_CIPHER_WEP;
1283b032f27cSSam Leffler 	case RSN_SEL(RSN_CSE_WEP104):
1284b032f27cSSam Leffler 		if (keylen)
1285b032f27cSSam Leffler 			*keylen = 104 / NBBY;
1286b032f27cSSam Leffler 		return IEEE80211_CIPHER_WEP;
1287b032f27cSSam Leffler 	case RSN_SEL(RSN_CSE_TKIP):
1288b032f27cSSam Leffler 		return IEEE80211_CIPHER_TKIP;
1289b032f27cSSam Leffler 	case RSN_SEL(RSN_CSE_CCMP):
1290b032f27cSSam Leffler 		return IEEE80211_CIPHER_AES_CCM;
1291b032f27cSSam Leffler 	case RSN_SEL(RSN_CSE_WRAP):
1292b032f27cSSam Leffler 		return IEEE80211_CIPHER_AES_OCB;
1293b032f27cSSam Leffler 	}
1294b032f27cSSam Leffler 	return 32;		/* NB: so 1<< is discarded */
1295b032f27cSSam Leffler #undef WPA_SEL
1296b032f27cSSam Leffler }
1297b032f27cSSam Leffler 
1298b032f27cSSam Leffler /*
1299b032f27cSSam Leffler  * Convert an RSN key management/authentication algorithm
1300b032f27cSSam Leffler  * to an internal code.
1301b032f27cSSam Leffler  */
1302b032f27cSSam Leffler static int
1303b032f27cSSam Leffler rsn_keymgmt(const uint8_t *sel)
1304b032f27cSSam Leffler {
1305b032f27cSSam Leffler #define	RSN_SEL(x)	(((x)<<24)|RSN_OUI)
1306b032f27cSSam Leffler 	uint32_t w = LE_READ_4(sel);
1307b032f27cSSam Leffler 
1308b032f27cSSam Leffler 	switch (w) {
1309b032f27cSSam Leffler 	case RSN_SEL(RSN_ASE_8021X_UNSPEC):
1310b032f27cSSam Leffler 		return RSN_ASE_8021X_UNSPEC;
1311b032f27cSSam Leffler 	case RSN_SEL(RSN_ASE_8021X_PSK):
1312b032f27cSSam Leffler 		return RSN_ASE_8021X_PSK;
1313b032f27cSSam Leffler 	case RSN_SEL(RSN_ASE_NONE):
1314b032f27cSSam Leffler 		return RSN_ASE_NONE;
1315b032f27cSSam Leffler 	}
1316b032f27cSSam Leffler 	return 0;		/* NB: so is discarded */
1317b032f27cSSam Leffler #undef RSN_SEL
1318b032f27cSSam Leffler }
1319b032f27cSSam Leffler 
1320b032f27cSSam Leffler /*
1321b032f27cSSam Leffler  * Parse a WPA/RSN information element to collect parameters
1322b032f27cSSam Leffler  * and validate the parameters against what has been
1323b032f27cSSam Leffler  * configured for the system.
1324b032f27cSSam Leffler  */
1325b032f27cSSam Leffler static int
1326b032f27cSSam Leffler ieee80211_parse_rsn(struct ieee80211vap *vap, const uint8_t *frm,
1327b032f27cSSam Leffler 	struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh)
1328b032f27cSSam Leffler {
1329b032f27cSSam Leffler 	uint8_t len = frm[1];
1330b032f27cSSam Leffler 	uint32_t w;
1331b032f27cSSam Leffler 	int n;
1332b032f27cSSam Leffler 
1333b032f27cSSam Leffler 	/*
1334b032f27cSSam Leffler 	 * Check the length once for fixed parts:
1335b032f27cSSam Leffler 	 * version, mcast cipher, and 2 selector counts.
1336b032f27cSSam Leffler 	 * Other, variable-length data, must be checked separately.
1337b032f27cSSam Leffler 	 */
1338b032f27cSSam Leffler 	if ((vap->iv_flags & IEEE80211_F_WPA2) == 0) {
1339b032f27cSSam Leffler 		IEEE80211_DISCARD_IE(vap,
1340b032f27cSSam Leffler 		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1341b032f27cSSam Leffler 		    wh, "WPA", "not RSN, flags 0x%x", vap->iv_flags);
1342b032f27cSSam Leffler 		return IEEE80211_REASON_IE_INVALID;
1343b032f27cSSam Leffler 	}
1344b032f27cSSam Leffler 	if (len < 10) {
1345b032f27cSSam Leffler 		IEEE80211_DISCARD_IE(vap,
1346b032f27cSSam Leffler 		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1347b032f27cSSam Leffler 		    wh, "RSN", "too short, len %u", len);
1348b032f27cSSam Leffler 		return IEEE80211_REASON_IE_INVALID;
1349b032f27cSSam Leffler 	}
1350b032f27cSSam Leffler 	frm += 2;
1351b032f27cSSam Leffler 	w = LE_READ_2(frm);
1352b032f27cSSam Leffler 	if (w != RSN_VERSION) {
1353b032f27cSSam Leffler 		IEEE80211_DISCARD_IE(vap,
1354b032f27cSSam Leffler 		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1355b032f27cSSam Leffler 		    wh, "RSN", "bad version %u", w);
1356b032f27cSSam Leffler 		return IEEE80211_REASON_IE_INVALID;
1357b032f27cSSam Leffler 	}
1358b032f27cSSam Leffler 	frm += 2, len -= 2;
1359b032f27cSSam Leffler 
1360b032f27cSSam Leffler 	memset(rsn, 0, sizeof(*rsn));
1361b032f27cSSam Leffler 
1362b032f27cSSam Leffler 	/* multicast/group cipher */
1363b032f27cSSam Leffler 	rsn->rsn_mcastcipher = rsn_cipher(frm, &rsn->rsn_mcastkeylen);
1364b032f27cSSam Leffler 	frm += 4, len -= 4;
1365b032f27cSSam Leffler 
1366b032f27cSSam Leffler 	/* unicast ciphers */
1367b032f27cSSam Leffler 	n = LE_READ_2(frm);
1368b032f27cSSam Leffler 	frm += 2, len -= 2;
1369b032f27cSSam Leffler 	if (len < n*4+2) {
1370b032f27cSSam Leffler 		IEEE80211_DISCARD_IE(vap,
1371b032f27cSSam Leffler 		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1372b032f27cSSam Leffler 		    wh, "RSN", "ucast cipher data too short; len %u, n %u",
1373b032f27cSSam Leffler 		    len, n);
1374b032f27cSSam Leffler 		return IEEE80211_REASON_IE_INVALID;
1375b032f27cSSam Leffler 	}
1376b032f27cSSam Leffler 	w = 0;
1377b032f27cSSam Leffler 	for (; n > 0; n--) {
1378b032f27cSSam Leffler 		w |= 1<<rsn_cipher(frm, &rsn->rsn_ucastkeylen);
1379b032f27cSSam Leffler 		frm += 4, len -= 4;
1380b032f27cSSam Leffler 	}
1381b032f27cSSam Leffler 	if (w & (1<<IEEE80211_CIPHER_TKIP))
1382b032f27cSSam Leffler 		rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP;
1383b032f27cSSam Leffler 	else
1384b032f27cSSam Leffler 		rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM;
1385b032f27cSSam Leffler 
1386b032f27cSSam Leffler 	/* key management algorithms */
1387b032f27cSSam Leffler 	n = LE_READ_2(frm);
1388b032f27cSSam Leffler 	frm += 2, len -= 2;
1389b032f27cSSam Leffler 	if (len < n*4) {
1390b032f27cSSam Leffler 		IEEE80211_DISCARD_IE(vap,
1391b032f27cSSam Leffler 		    IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1392b032f27cSSam Leffler 		    wh, "RSN", "key mgmt alg data too short; len %u, n %u",
1393b032f27cSSam Leffler 		    len, n);
1394b032f27cSSam Leffler 		return IEEE80211_REASON_IE_INVALID;
1395b032f27cSSam Leffler 	}
1396b032f27cSSam Leffler 	w = 0;
1397b032f27cSSam Leffler 	for (; n > 0; n--) {
1398b032f27cSSam Leffler 		w |= rsn_keymgmt(frm);
1399b032f27cSSam Leffler 		frm += 4, len -= 4;
1400b032f27cSSam Leffler 	}
1401b032f27cSSam Leffler 	if (w & RSN_ASE_8021X_UNSPEC)
1402b032f27cSSam Leffler 		rsn->rsn_keymgmt = RSN_ASE_8021X_UNSPEC;
1403b032f27cSSam Leffler 	else
1404b032f27cSSam Leffler 		rsn->rsn_keymgmt = RSN_ASE_8021X_PSK;
1405b032f27cSSam Leffler 
1406b032f27cSSam Leffler 	/* optional RSN capabilities */
1407b032f27cSSam Leffler 	if (len > 2)
1408b032f27cSSam Leffler 		rsn->rsn_caps = LE_READ_2(frm);
1409b032f27cSSam Leffler 	/* XXXPMKID */
1410b032f27cSSam Leffler 
1411b032f27cSSam Leffler 	return 0;
1412b032f27cSSam Leffler }
1413b032f27cSSam Leffler 
1414b032f27cSSam Leffler /*
1415b032f27cSSam Leffler  * WPA/802.11i assocation request processing.
1416b032f27cSSam Leffler  */
1417b032f27cSSam Leffler static int
1418b032f27cSSam Leffler wpa_assocreq(struct ieee80211_node *ni, struct ieee80211_rsnparms *rsnparms,
1419b032f27cSSam Leffler 	const struct ieee80211_frame *wh, const uint8_t *wpa,
1420b032f27cSSam Leffler 	const uint8_t *rsn, uint16_t capinfo)
1421b032f27cSSam Leffler {
1422b032f27cSSam Leffler 	struct ieee80211vap *vap = ni->ni_vap;
1423b032f27cSSam Leffler 	uint8_t reason;
1424b032f27cSSam Leffler 	int badwparsn;
1425b032f27cSSam Leffler 
1426b032f27cSSam Leffler 	ni->ni_flags &= ~(IEEE80211_NODE_WPS|IEEE80211_NODE_TSN);
1427b032f27cSSam Leffler 	if (wpa == NULL && rsn == NULL) {
1428b032f27cSSam Leffler 		if (vap->iv_flags_ext & IEEE80211_FEXT_WPS) {
1429b032f27cSSam Leffler 			/*
1430b032f27cSSam Leffler 			 * W-Fi Protected Setup (WPS) permits
1431b032f27cSSam Leffler 			 * clients to associate and pass EAPOL frames
1432b032f27cSSam Leffler 			 * to establish initial credentials.
1433b032f27cSSam Leffler 			 */
1434b032f27cSSam Leffler 			ni->ni_flags |= IEEE80211_NODE_WPS;
1435b032f27cSSam Leffler 			return 1;
1436b032f27cSSam Leffler 		}
1437b032f27cSSam Leffler 		if ((vap->iv_flags_ext & IEEE80211_FEXT_TSN) &&
1438b032f27cSSam Leffler 		    (capinfo & IEEE80211_CAPINFO_PRIVACY)) {
1439b032f27cSSam Leffler 			/*
1440b032f27cSSam Leffler 			 * Transitional Security Network.  Permits clients
1441b032f27cSSam Leffler 			 * to associate and use WEP while WPA is configured.
1442b032f27cSSam Leffler 			 */
1443b032f27cSSam Leffler 			ni->ni_flags |= IEEE80211_NODE_TSN;
1444b032f27cSSam Leffler 			return 1;
1445b032f27cSSam Leffler 		}
1446b032f27cSSam Leffler 		IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA,
1447b032f27cSSam Leffler 		    wh, NULL, "%s", "no WPA/RSN IE in association request");
1448b032f27cSSam Leffler 		vap->iv_stats.is_rx_assoc_badwpaie++;
1449b032f27cSSam Leffler 		reason = IEEE80211_REASON_IE_INVALID;
1450b032f27cSSam Leffler 		goto bad;
1451b032f27cSSam Leffler 	}
1452b032f27cSSam Leffler 	/* assert right association security credentials */
1453b032f27cSSam Leffler 	badwparsn = 0;			/* NB: to silence compiler */
1454b032f27cSSam Leffler 	switch (vap->iv_flags & IEEE80211_F_WPA) {
1455b032f27cSSam Leffler 	case IEEE80211_F_WPA1:
1456b032f27cSSam Leffler 		badwparsn = (wpa == NULL);
1457b032f27cSSam Leffler 		break;
1458b032f27cSSam Leffler 	case IEEE80211_F_WPA2:
1459b032f27cSSam Leffler 		badwparsn = (rsn == NULL);
1460b032f27cSSam Leffler 		break;
1461b032f27cSSam Leffler 	case IEEE80211_F_WPA1|IEEE80211_F_WPA2:
1462b032f27cSSam Leffler 		badwparsn = (wpa == NULL && rsn == NULL);
1463b032f27cSSam Leffler 		break;
1464b032f27cSSam Leffler 	}
1465b032f27cSSam Leffler 	if (badwparsn) {
1466b032f27cSSam Leffler 		IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA,
1467b032f27cSSam Leffler 		    wh, NULL,
1468b032f27cSSam Leffler 		    "%s", "missing WPA/RSN IE in association request");
1469b032f27cSSam Leffler 		vap->iv_stats.is_rx_assoc_badwpaie++;
1470b032f27cSSam Leffler 		reason = IEEE80211_REASON_IE_INVALID;
1471b032f27cSSam Leffler 		goto bad;
1472b032f27cSSam Leffler 	}
1473b032f27cSSam Leffler 	/*
1474b032f27cSSam Leffler 	 * Parse WPA/RSN information element.
1475b032f27cSSam Leffler 	 */
1476b032f27cSSam Leffler 	if (wpa != NULL)
1477b032f27cSSam Leffler 		reason = ieee80211_parse_wpa(vap, wpa, rsnparms, wh);
1478b032f27cSSam Leffler 	else
1479b032f27cSSam Leffler 		reason = ieee80211_parse_rsn(vap, rsn, rsnparms, wh);
1480b032f27cSSam Leffler 	if (reason != 0) {
1481b032f27cSSam Leffler 		/* XXX distinguish WPA/RSN? */
1482b032f27cSSam Leffler 		vap->iv_stats.is_rx_assoc_badwpaie++;
1483b032f27cSSam Leffler 		goto bad;
1484b032f27cSSam Leffler 	}
1485b032f27cSSam Leffler 	IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, ni,
1486b032f27cSSam Leffler 	    "%s ie: mc %u/%u uc %u/%u key %u caps 0x%x",
1487b032f27cSSam Leffler 	    wpa != NULL ? "WPA" : "RSN",
1488b032f27cSSam Leffler 	    rsnparms->rsn_mcastcipher, rsnparms->rsn_mcastkeylen,
1489b032f27cSSam Leffler 	    rsnparms->rsn_ucastcipher, rsnparms->rsn_ucastkeylen,
1490b032f27cSSam Leffler 	    rsnparms->rsn_keymgmt, rsnparms->rsn_caps);
1491b032f27cSSam Leffler 
1492b032f27cSSam Leffler 	return 1;
1493b032f27cSSam Leffler bad:
1494b032f27cSSam Leffler 	ieee80211_node_deauth(ni, reason);
1495b032f27cSSam Leffler 	return 0;
1496b032f27cSSam Leffler }
1497b032f27cSSam Leffler 
1498b032f27cSSam Leffler /* XXX find a better place for definition */
1499b032f27cSSam Leffler struct l2_update_frame {
1500b032f27cSSam Leffler 	struct ether_header eh;
1501b032f27cSSam Leffler 	uint8_t dsap;
1502b032f27cSSam Leffler 	uint8_t ssap;
1503b032f27cSSam Leffler 	uint8_t control;
1504b032f27cSSam Leffler 	uint8_t xid[3];
1505b032f27cSSam Leffler }  __packed;
1506b032f27cSSam Leffler 
1507b032f27cSSam Leffler /*
1508b032f27cSSam Leffler  * Deliver a TGf L2UF frame on behalf of a station.
1509b032f27cSSam Leffler  * This primes any bridge when the station is roaming
1510b032f27cSSam Leffler  * between ap's on the same wired network.
1511b032f27cSSam Leffler  */
1512b032f27cSSam Leffler static void
1513b032f27cSSam Leffler ieee80211_deliver_l2uf(struct ieee80211_node *ni)
1514b032f27cSSam Leffler {
1515b032f27cSSam Leffler 	struct ieee80211vap *vap = ni->ni_vap;
1516b032f27cSSam Leffler 	struct ifnet *ifp = vap->iv_ifp;
1517b032f27cSSam Leffler 	struct mbuf *m;
1518b032f27cSSam Leffler 	struct l2_update_frame *l2uf;
1519b032f27cSSam Leffler 	struct ether_header *eh;
1520b032f27cSSam Leffler 
1521b032f27cSSam Leffler 	m = m_gethdr(M_NOWAIT, MT_DATA);
1522b032f27cSSam Leffler 	if (m == NULL) {
1523b032f27cSSam Leffler 		IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
1524b032f27cSSam Leffler 		    "%s", "no mbuf for l2uf frame");
1525b032f27cSSam Leffler 		vap->iv_stats.is_rx_nobuf++;	/* XXX not right */
1526b032f27cSSam Leffler 		return;
1527b032f27cSSam Leffler 	}
1528b032f27cSSam Leffler 	l2uf = mtod(m, struct l2_update_frame *);
1529b032f27cSSam Leffler 	eh = &l2uf->eh;
1530b032f27cSSam Leffler 	/* dst: Broadcast address */
1531b032f27cSSam Leffler 	IEEE80211_ADDR_COPY(eh->ether_dhost, ifp->if_broadcastaddr);
1532b032f27cSSam Leffler 	/* src: associated STA */
1533b032f27cSSam Leffler 	IEEE80211_ADDR_COPY(eh->ether_shost, ni->ni_macaddr);
1534b032f27cSSam Leffler 	eh->ether_type = htons(sizeof(*l2uf) - sizeof(*eh));
1535b032f27cSSam Leffler 
1536b032f27cSSam Leffler 	l2uf->dsap = 0;
1537b032f27cSSam Leffler 	l2uf->ssap = 0;
1538b032f27cSSam Leffler 	l2uf->control = 0xf5;
1539b032f27cSSam Leffler 	l2uf->xid[0] = 0x81;
1540b032f27cSSam Leffler 	l2uf->xid[1] = 0x80;
1541b032f27cSSam Leffler 	l2uf->xid[2] = 0x00;
1542b032f27cSSam Leffler 
1543b032f27cSSam Leffler 	m->m_pkthdr.len = m->m_len = sizeof(*l2uf);
1544b032f27cSSam Leffler 	hostap_deliver_data(vap, ni, m);
1545b032f27cSSam Leffler }
1546b032f27cSSam Leffler 
1547b032f27cSSam Leffler static void
1548b032f27cSSam Leffler ratesetmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1549b032f27cSSam Leffler 	int reassoc, int resp, const char *tag, int rate)
1550b032f27cSSam Leffler {
1551b032f27cSSam Leffler 	IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2,
1552b032f27cSSam Leffler 	    "deny %s request, %s rate set mismatch, rate/MCS %d",
1553b032f27cSSam Leffler 	    reassoc ? "reassoc" : "assoc", tag, rate & IEEE80211_RATE_VAL);
1554b032f27cSSam Leffler 	IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_BASIC_RATE);
1555b032f27cSSam Leffler 	ieee80211_node_leave(ni);
1556b032f27cSSam Leffler }
1557b032f27cSSam Leffler 
1558b032f27cSSam Leffler static void
1559b032f27cSSam Leffler capinfomismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1560b032f27cSSam Leffler 	int reassoc, int resp, const char *tag, int capinfo)
1561b032f27cSSam Leffler {
1562b032f27cSSam Leffler 	struct ieee80211vap *vap = ni->ni_vap;
1563b032f27cSSam Leffler 
1564b032f27cSSam Leffler 	IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2,
1565b032f27cSSam Leffler 	    "deny %s request, %s mismatch 0x%x",
1566b032f27cSSam Leffler 	    reassoc ? "reassoc" : "assoc", tag, capinfo);
1567b032f27cSSam Leffler 	IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_CAPINFO);
1568b032f27cSSam Leffler 	ieee80211_node_leave(ni);
1569b032f27cSSam Leffler 	vap->iv_stats.is_rx_assoc_capmismatch++;
1570b032f27cSSam Leffler }
1571b032f27cSSam Leffler 
1572b032f27cSSam Leffler static void
1573b032f27cSSam Leffler htcapmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1574b032f27cSSam Leffler 	int reassoc, int resp)
1575b032f27cSSam Leffler {
1576b032f27cSSam Leffler 	IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2,
1577b032f27cSSam Leffler 	    "deny %s request, %s missing HT ie", reassoc ? "reassoc" : "assoc");
1578b032f27cSSam Leffler 	/* XXX no better code */
1579b032f27cSSam Leffler 	IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_OTHER);
1580b032f27cSSam Leffler 	ieee80211_node_leave(ni);
1581b032f27cSSam Leffler }
1582b032f27cSSam Leffler 
1583b032f27cSSam Leffler static void
1584b032f27cSSam Leffler authalgreject(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1585b032f27cSSam Leffler 	int algo, int seq, int status)
1586b032f27cSSam Leffler {
1587b032f27cSSam Leffler 	struct ieee80211vap *vap = ni->ni_vap;
1588b032f27cSSam Leffler 
1589b032f27cSSam Leffler 	IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1590b032f27cSSam Leffler 	    wh, NULL, "unsupported alg %d", algo);
1591b032f27cSSam Leffler 	vap->iv_stats.is_rx_auth_unsupported++;
1592b032f27cSSam Leffler 	ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_AUTH,
1593b032f27cSSam Leffler 	    seq | (status << 16));
1594b032f27cSSam Leffler }
1595b032f27cSSam Leffler 
1596b032f27cSSam Leffler static __inline int
1597b032f27cSSam Leffler ishtmixed(const uint8_t *ie)
1598b032f27cSSam Leffler {
1599b032f27cSSam Leffler 	const struct ieee80211_ie_htinfo *ht =
1600b032f27cSSam Leffler 	    (const struct ieee80211_ie_htinfo *) ie;
1601b032f27cSSam Leffler 	return (ht->hi_byte2 & IEEE80211_HTINFO_OPMODE) ==
1602b032f27cSSam Leffler 	    IEEE80211_HTINFO_OPMODE_MIXED;
1603b032f27cSSam Leffler }
1604b032f27cSSam Leffler 
1605b032f27cSSam Leffler static int
1606b032f27cSSam Leffler is11bclient(const uint8_t *rates, const uint8_t *xrates)
1607b032f27cSSam Leffler {
1608b032f27cSSam Leffler 	static const uint32_t brates = (1<<2*1)|(1<<2*2)|(1<<11)|(1<<2*11);
1609b032f27cSSam Leffler 	int i;
1610b032f27cSSam Leffler 
1611b032f27cSSam Leffler 	/* NB: the 11b clients we care about will not have xrates */
1612b032f27cSSam Leffler 	if (xrates != NULL || rates == NULL)
1613b032f27cSSam Leffler 		return 0;
1614b032f27cSSam Leffler 	for (i = 0; i < rates[1]; i++) {
1615b032f27cSSam Leffler 		int r = rates[2+i] & IEEE80211_RATE_VAL;
1616b032f27cSSam Leffler 		if (r > 2*11 || ((1<<r) & brates) == 0)
1617b032f27cSSam Leffler 			return 0;
1618b032f27cSSam Leffler 	}
1619b032f27cSSam Leffler 	return 1;
1620b032f27cSSam Leffler }
1621b032f27cSSam Leffler 
1622b032f27cSSam Leffler static void
1623b032f27cSSam Leffler hostap_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0,
16245463c4a4SSam Leffler 	int subtype, int rssi, int nf)
1625b032f27cSSam Leffler {
1626b032f27cSSam Leffler 	struct ieee80211vap *vap = ni->ni_vap;
1627b032f27cSSam Leffler 	struct ieee80211com *ic = ni->ni_ic;
1628b032f27cSSam Leffler 	struct ieee80211_frame *wh;
1629b032f27cSSam Leffler 	uint8_t *frm, *efrm, *sfrm;
1630b032f27cSSam Leffler 	uint8_t *ssid, *rates, *xrates, *wpa, *rsn, *wme, *ath, *htcap;
1631b032f27cSSam Leffler 	int reassoc, resp;
1632b032f27cSSam Leffler 	uint8_t rate;
1633b032f27cSSam Leffler 
1634b032f27cSSam Leffler 	wh = mtod(m0, struct ieee80211_frame *);
1635b032f27cSSam Leffler 	frm = (uint8_t *)&wh[1];
1636b032f27cSSam Leffler 	efrm = mtod(m0, uint8_t *) + m0->m_len;
1637b032f27cSSam Leffler 	switch (subtype) {
1638b032f27cSSam Leffler 	case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1639b032f27cSSam Leffler 	case IEEE80211_FC0_SUBTYPE_BEACON: {
1640b032f27cSSam Leffler 		struct ieee80211_scanparams scan;
1641b032f27cSSam Leffler 		/*
1642b032f27cSSam Leffler 		 * We process beacon/probe response frames when scanning;
1643b032f27cSSam Leffler 		 * otherwise we check beacon frames for overlapping non-ERP
1644b032f27cSSam Leffler 		 * BSS in 11g and/or overlapping legacy BSS when in HT.
1645b032f27cSSam Leffler 		 */
1646b032f27cSSam Leffler 		if ((ic->ic_flags & IEEE80211_F_SCAN) == 0 &&
1647b032f27cSSam Leffler 		    subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) {
1648b032f27cSSam Leffler 			vap->iv_stats.is_rx_mgtdiscard++;
1649b032f27cSSam Leffler 			return;
1650b032f27cSSam Leffler 		}
1651b032f27cSSam Leffler 		/* NB: accept off-channel frames */
1652b032f27cSSam Leffler 		if (ieee80211_parse_beacon(ni, m0, &scan) &~ IEEE80211_BPARSE_OFFCHAN)
1653b032f27cSSam Leffler 			return;
1654b032f27cSSam Leffler 		/*
1655b032f27cSSam Leffler 		 * Count frame now that we know it's to be processed.
1656b032f27cSSam Leffler 		 */
1657b032f27cSSam Leffler 		if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1658b032f27cSSam Leffler 			vap->iv_stats.is_rx_beacon++;		/* XXX remove */
1659b032f27cSSam Leffler 			IEEE80211_NODE_STAT(ni, rx_beacons);
1660b032f27cSSam Leffler 		} else
1661b032f27cSSam Leffler 			IEEE80211_NODE_STAT(ni, rx_proberesp);
1662b032f27cSSam Leffler 		/*
1663b032f27cSSam Leffler 		 * If scanning, just pass information to the scan module.
1664b032f27cSSam Leffler 		 */
1665b032f27cSSam Leffler 		if (ic->ic_flags & IEEE80211_F_SCAN) {
1666b032f27cSSam Leffler 			if (scan.status == 0 &&		/* NB: on channel */
1667b032f27cSSam Leffler 			    (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN)) {
1668b032f27cSSam Leffler 				/*
1669b032f27cSSam Leffler 				 * Actively scanning a channel marked passive;
1670b032f27cSSam Leffler 				 * send a probe request now that we know there
1671b032f27cSSam Leffler 				 * is 802.11 traffic present.
1672b032f27cSSam Leffler 				 *
1673b032f27cSSam Leffler 				 * XXX check if the beacon we recv'd gives
1674b032f27cSSam Leffler 				 * us what we need and suppress the probe req
1675b032f27cSSam Leffler 				 */
1676b032f27cSSam Leffler 				ieee80211_probe_curchan(vap, 1);
1677b032f27cSSam Leffler 				ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1678b032f27cSSam Leffler 			}
16795463c4a4SSam Leffler 			ieee80211_add_scan(vap, &scan, wh, subtype, rssi, nf);
1680b032f27cSSam Leffler 			return;
1681b032f27cSSam Leffler 		}
1682b032f27cSSam Leffler 		/*
1683b032f27cSSam Leffler 		 * Check beacon for overlapping bss w/ non ERP stations.
1684b032f27cSSam Leffler 		 * If we detect one and protection is configured but not
1685b032f27cSSam Leffler 		 * enabled, enable it and start a timer that'll bring us
1686b032f27cSSam Leffler 		 * out if we stop seeing the bss.
1687b032f27cSSam Leffler 		 */
1688b032f27cSSam Leffler 		if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
1689b032f27cSSam Leffler 		    scan.status == 0 &&			/* NB: on-channel */
1690b032f27cSSam Leffler 		    ((scan.erp & 0x100) == 0 ||		/* NB: no ERP, 11b sta*/
1691b032f27cSSam Leffler 		     (scan.erp & IEEE80211_ERP_NON_ERP_PRESENT))) {
1692b032f27cSSam Leffler 			ic->ic_lastnonerp = ticks;
1693b032f27cSSam Leffler 			ic->ic_flags_ext |= IEEE80211_FEXT_NONERP_PR;
1694b032f27cSSam Leffler 			if (ic->ic_protmode != IEEE80211_PROT_NONE &&
1695b032f27cSSam Leffler 			    (ic->ic_flags & IEEE80211_F_USEPROT) == 0) {
1696b032f27cSSam Leffler 				IEEE80211_NOTE_FRAME(vap,
1697b032f27cSSam Leffler 				    IEEE80211_MSG_ASSOC, wh,
1698b032f27cSSam Leffler 				    "non-ERP present on channel %d "
1699b032f27cSSam Leffler 				    "(saw erp 0x%x from channel %d), "
1700b032f27cSSam Leffler 				    "enable use of protection",
1701b032f27cSSam Leffler 				    ic->ic_curchan->ic_ieee,
1702b032f27cSSam Leffler 				    scan.erp, scan.chan);
1703b032f27cSSam Leffler 				ic->ic_flags |= IEEE80211_F_USEPROT;
1704b032f27cSSam Leffler 				ieee80211_notify_erp(ic);
1705b032f27cSSam Leffler 			}
1706b032f27cSSam Leffler 		}
1707b032f27cSSam Leffler 		/*
1708b032f27cSSam Leffler 		 * Check beacon for non-HT station on HT channel
1709b032f27cSSam Leffler 		 * and update HT BSS occupancy as appropriate.
1710b032f27cSSam Leffler 		 */
1711b032f27cSSam Leffler 		if (IEEE80211_IS_CHAN_HT(ic->ic_curchan)) {
1712b032f27cSSam Leffler 			if (scan.status & IEEE80211_BPARSE_OFFCHAN) {
1713b032f27cSSam Leffler 				/*
1714b032f27cSSam Leffler 				 * Off control channel; only check frames
1715b032f27cSSam Leffler 				 * that come in the extension channel when
1716b032f27cSSam Leffler 				 * operating w/ HT40.
1717b032f27cSSam Leffler 				 */
1718b032f27cSSam Leffler 				if (!IEEE80211_IS_CHAN_HT40(ic->ic_curchan))
1719b032f27cSSam Leffler 					break;
1720b032f27cSSam Leffler 				if (scan.chan != ic->ic_curchan->ic_extieee)
1721b032f27cSSam Leffler 					break;
1722b032f27cSSam Leffler 			}
1723b032f27cSSam Leffler 			if (scan.htinfo == NULL) {
1724b032f27cSSam Leffler 				ieee80211_htprot_update(ic,
1725b032f27cSSam Leffler 				    IEEE80211_HTINFO_OPMODE_PROTOPT |
1726b032f27cSSam Leffler 				    IEEE80211_HTINFO_NONHT_PRESENT);
1727b032f27cSSam Leffler 			} else if (ishtmixed(scan.htinfo)) {
1728b032f27cSSam Leffler 				/* XXX? take NONHT_PRESENT from beacon? */
1729b032f27cSSam Leffler 				ieee80211_htprot_update(ic,
1730b032f27cSSam Leffler 				    IEEE80211_HTINFO_OPMODE_MIXED |
1731b032f27cSSam Leffler 				    IEEE80211_HTINFO_NONHT_PRESENT);
1732b032f27cSSam Leffler 			}
1733b032f27cSSam Leffler 		}
1734b032f27cSSam Leffler 		break;
1735b032f27cSSam Leffler 	}
1736b032f27cSSam Leffler 
1737b032f27cSSam Leffler 	case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1738b032f27cSSam Leffler 		if (vap->iv_state != IEEE80211_S_RUN) {
1739b032f27cSSam Leffler 			vap->iv_stats.is_rx_mgtdiscard++;
1740b032f27cSSam Leffler 			return;
1741b032f27cSSam Leffler 		}
1742b032f27cSSam Leffler 		/*
1743b032f27cSSam Leffler 		 * prreq frame format
1744b032f27cSSam Leffler 		 *	[tlv] ssid
1745b032f27cSSam Leffler 		 *	[tlv] supported rates
1746b032f27cSSam Leffler 		 *	[tlv] extended supported rates
1747b032f27cSSam Leffler 		 */
1748b032f27cSSam Leffler 		ssid = rates = xrates = NULL;
1749b032f27cSSam Leffler 		sfrm = frm;
1750b032f27cSSam Leffler 		while (efrm - frm > 1) {
1751b032f27cSSam Leffler 			IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1752b032f27cSSam Leffler 			switch (*frm) {
1753b032f27cSSam Leffler 			case IEEE80211_ELEMID_SSID:
1754b032f27cSSam Leffler 				ssid = frm;
1755b032f27cSSam Leffler 				break;
1756b032f27cSSam Leffler 			case IEEE80211_ELEMID_RATES:
1757b032f27cSSam Leffler 				rates = frm;
1758b032f27cSSam Leffler 				break;
1759b032f27cSSam Leffler 			case IEEE80211_ELEMID_XRATES:
1760b032f27cSSam Leffler 				xrates = frm;
1761b032f27cSSam Leffler 				break;
1762b032f27cSSam Leffler 			}
1763b032f27cSSam Leffler 			frm += frm[1] + 2;
1764b032f27cSSam Leffler 		}
1765b032f27cSSam Leffler 		IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
1766b032f27cSSam Leffler 		if (xrates != NULL)
1767b032f27cSSam Leffler 			IEEE80211_VERIFY_ELEMENT(xrates,
1768b032f27cSSam Leffler 				IEEE80211_RATE_MAXSIZE - rates[1], return);
1769b032f27cSSam Leffler 		IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
1770b032f27cSSam Leffler 		IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return);
1771b032f27cSSam Leffler 		if ((vap->iv_flags & IEEE80211_F_HIDESSID) && ssid[1] == 0) {
1772b032f27cSSam Leffler 			IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1773b032f27cSSam Leffler 			    wh, NULL,
1774b032f27cSSam Leffler 			    "%s", "no ssid with ssid suppression enabled");
1775b032f27cSSam Leffler 			vap->iv_stats.is_rx_ssidmismatch++; /*XXX*/
1776b032f27cSSam Leffler 			return;
1777b032f27cSSam Leffler 		}
1778b032f27cSSam Leffler 
1779b032f27cSSam Leffler 		/* XXX find a better class or define it's own */
1780b032f27cSSam Leffler 		IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
1781b032f27cSSam Leffler 		    "%s", "recv probe req");
1782b032f27cSSam Leffler 		/*
1783b032f27cSSam Leffler 		 * Some legacy 11b clients cannot hack a complete
1784b032f27cSSam Leffler 		 * probe response frame.  When the request includes
1785b032f27cSSam Leffler 		 * only a bare-bones rate set, communicate this to
1786b032f27cSSam Leffler 		 * the transmit side.
1787b032f27cSSam Leffler 		 */
1788b032f27cSSam Leffler 		ieee80211_send_proberesp(vap, wh->i_addr2,
1789b032f27cSSam Leffler 		    is11bclient(rates, xrates) ? IEEE80211_SEND_LEGACY_11B : 0);
1790b032f27cSSam Leffler 		break;
1791b032f27cSSam Leffler 
1792b032f27cSSam Leffler 	case IEEE80211_FC0_SUBTYPE_AUTH: {
1793b032f27cSSam Leffler 		uint16_t algo, seq, status;
1794b032f27cSSam Leffler 
1795b032f27cSSam Leffler 		if (vap->iv_state != IEEE80211_S_RUN) {
1796b032f27cSSam Leffler 			vap->iv_stats.is_rx_mgtdiscard++;
1797b032f27cSSam Leffler 			return;
1798b032f27cSSam Leffler 		}
1799b032f27cSSam Leffler 		if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) {
1800b032f27cSSam Leffler 			IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1801b032f27cSSam Leffler 			    wh, NULL, "%s", "wrong bssid");
1802b032f27cSSam Leffler 			vap->iv_stats.is_rx_wrongbss++;	/*XXX unique stat?*/
1803b032f27cSSam Leffler 			return;
1804b032f27cSSam Leffler 		}
1805b032f27cSSam Leffler 		/*
1806b032f27cSSam Leffler 		 * auth frame format
1807b032f27cSSam Leffler 		 *	[2] algorithm
1808b032f27cSSam Leffler 		 *	[2] sequence
1809b032f27cSSam Leffler 		 *	[2] status
1810b032f27cSSam Leffler 		 *	[tlv*] challenge
1811b032f27cSSam Leffler 		 */
1812b032f27cSSam Leffler 		IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return);
1813b032f27cSSam Leffler 		algo   = le16toh(*(uint16_t *)frm);
1814b032f27cSSam Leffler 		seq    = le16toh(*(uint16_t *)(frm + 2));
1815b032f27cSSam Leffler 		status = le16toh(*(uint16_t *)(frm + 4));
1816b032f27cSSam Leffler 		IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2,
1817b032f27cSSam Leffler 		    "recv auth frame with algorithm %d seq %d", algo, seq);
1818b032f27cSSam Leffler 		/*
1819b032f27cSSam Leffler 		 * Consult the ACL policy module if setup.
1820b032f27cSSam Leffler 		 */
1821b032f27cSSam Leffler 		if (vap->iv_acl != NULL &&
1822b032f27cSSam Leffler 		    !vap->iv_acl->iac_check(vap, wh->i_addr2)) {
1823b032f27cSSam Leffler 			IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1824b032f27cSSam Leffler 			    wh, NULL, "%s", "disallowed by ACL");
1825b032f27cSSam Leffler 			vap->iv_stats.is_rx_acl++;
1826b032f27cSSam Leffler 			ieee80211_send_error(ni, wh->i_addr2,
1827b032f27cSSam Leffler 			    IEEE80211_FC0_SUBTYPE_AUTH,
1828b032f27cSSam Leffler 			    (seq+1) | (IEEE80211_STATUS_UNSPECIFIED<<16));
1829b032f27cSSam Leffler 			return;
1830b032f27cSSam Leffler 		}
1831b032f27cSSam Leffler 		if (vap->iv_flags & IEEE80211_F_COUNTERM) {
1832b032f27cSSam Leffler 			IEEE80211_DISCARD(vap,
1833b032f27cSSam Leffler 			    IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO,
1834b032f27cSSam Leffler 			    wh, NULL, "%s", "TKIP countermeasures enabled");
1835b032f27cSSam Leffler 			vap->iv_stats.is_rx_auth_countermeasures++;
1836b032f27cSSam Leffler 			ieee80211_send_error(ni, wh->i_addr2,
1837b032f27cSSam Leffler 				IEEE80211_FC0_SUBTYPE_AUTH,
1838b032f27cSSam Leffler 				IEEE80211_REASON_MIC_FAILURE);
1839b032f27cSSam Leffler 			return;
1840b032f27cSSam Leffler 		}
1841b032f27cSSam Leffler 		if (algo == IEEE80211_AUTH_ALG_SHARED)
18425463c4a4SSam Leffler 			hostap_auth_shared(ni, wh, frm + 6, efrm, rssi, nf,
1843b032f27cSSam Leffler 			    seq, status);
18445463c4a4SSam Leffler 		else if (algo == IEEE80211_AUTH_ALG_OPEN)
18455463c4a4SSam Leffler 			hostap_auth_open(ni, wh, rssi, nf, seq, status);
1846b032f27cSSam Leffler 		else if (algo == IEEE80211_AUTH_ALG_LEAP) {
1847b032f27cSSam Leffler 			authalgreject(ni, wh, algo,
1848b032f27cSSam Leffler 			    seq+1, IEEE80211_STATUS_ALG);
1849b032f27cSSam Leffler 			return;
1850b032f27cSSam Leffler 		} else {
1851b032f27cSSam Leffler 			/*
1852b032f27cSSam Leffler 			 * We assume that an unknown algorithm is the result
1853b032f27cSSam Leffler 			 * of a decryption failure on a shared key auth frame;
1854b032f27cSSam Leffler 			 * return a status code appropriate for that instead
1855b032f27cSSam Leffler 			 * of IEEE80211_STATUS_ALG.
1856b032f27cSSam Leffler 			 *
1857b032f27cSSam Leffler 			 * NB: a seq# of 4 is intentional; the decrypted
1858b032f27cSSam Leffler 			 *     frame likely has a bogus seq value.
1859b032f27cSSam Leffler 			 */
1860b032f27cSSam Leffler 			authalgreject(ni, wh, algo,
1861b032f27cSSam Leffler 			    4, IEEE80211_STATUS_CHALLENGE);
1862b032f27cSSam Leffler 			return;
1863b032f27cSSam Leffler 		}
1864b032f27cSSam Leffler 		break;
1865b032f27cSSam Leffler 	}
1866b032f27cSSam Leffler 
1867b032f27cSSam Leffler 	case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
1868b032f27cSSam Leffler 	case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: {
1869b032f27cSSam Leffler 		uint16_t capinfo, lintval;
1870b032f27cSSam Leffler 		struct ieee80211_rsnparms rsnparms;
1871b032f27cSSam Leffler 
1872b032f27cSSam Leffler 		if (vap->iv_state != IEEE80211_S_RUN) {
1873b032f27cSSam Leffler 			vap->iv_stats.is_rx_mgtdiscard++;
1874b032f27cSSam Leffler 			return;
1875b032f27cSSam Leffler 		}
1876b032f27cSSam Leffler 		if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) {
1877b032f27cSSam Leffler 			IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1878b032f27cSSam Leffler 			    wh, NULL, "%s", "wrong bssid");
1879b032f27cSSam Leffler 			vap->iv_stats.is_rx_assoc_bss++;
1880b032f27cSSam Leffler 			return;
1881b032f27cSSam Leffler 		}
1882b032f27cSSam Leffler 		if (subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) {
1883b032f27cSSam Leffler 			reassoc = 1;
1884b032f27cSSam Leffler 			resp = IEEE80211_FC0_SUBTYPE_REASSOC_RESP;
1885b032f27cSSam Leffler 		} else {
1886b032f27cSSam Leffler 			reassoc = 0;
1887b032f27cSSam Leffler 			resp = IEEE80211_FC0_SUBTYPE_ASSOC_RESP;
1888b032f27cSSam Leffler 		}
1889b032f27cSSam Leffler 		if (ni == vap->iv_bss) {
1890b032f27cSSam Leffler 			IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2,
1891b032f27cSSam Leffler 			    "deny %s request, sta not authenticated",
1892b032f27cSSam Leffler 			    reassoc ? "reassoc" : "assoc");
1893b032f27cSSam Leffler 			ieee80211_send_error(ni, wh->i_addr2,
1894b032f27cSSam Leffler 			    IEEE80211_FC0_SUBTYPE_DEAUTH,
1895b032f27cSSam Leffler 			    IEEE80211_REASON_ASSOC_NOT_AUTHED);
1896b032f27cSSam Leffler 			vap->iv_stats.is_rx_assoc_notauth++;
1897b032f27cSSam Leffler 			return;
1898b032f27cSSam Leffler 		}
1899b032f27cSSam Leffler 
1900b032f27cSSam Leffler 		/*
1901b032f27cSSam Leffler 		 * asreq frame format
1902b032f27cSSam Leffler 		 *	[2] capability information
1903b032f27cSSam Leffler 		 *	[2] listen interval
1904b032f27cSSam Leffler 		 *	[6*] current AP address (reassoc only)
1905b032f27cSSam Leffler 		 *	[tlv] ssid
1906b032f27cSSam Leffler 		 *	[tlv] supported rates
1907b032f27cSSam Leffler 		 *	[tlv] extended supported rates
1908b032f27cSSam Leffler 		 *	[tlv] WPA or RSN
1909b032f27cSSam Leffler 		 *	[tlv] HT capabilities
1910b032f27cSSam Leffler 		 *	[tlv] Atheros capabilities
1911b032f27cSSam Leffler 		 */
1912b032f27cSSam Leffler 		IEEE80211_VERIFY_LENGTH(efrm - frm, (reassoc ? 10 : 4), return);
1913b032f27cSSam Leffler 		capinfo = le16toh(*(uint16_t *)frm);	frm += 2;
1914b032f27cSSam Leffler 		lintval = le16toh(*(uint16_t *)frm);	frm += 2;
1915b032f27cSSam Leffler 		if (reassoc)
1916b032f27cSSam Leffler 			frm += 6;	/* ignore current AP info */
1917b032f27cSSam Leffler 		ssid = rates = xrates = wpa = rsn = wme = ath = htcap = NULL;
1918b032f27cSSam Leffler 		sfrm = frm;
1919b032f27cSSam Leffler 		while (efrm - frm > 1) {
1920b032f27cSSam Leffler 			IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1921b032f27cSSam Leffler 			switch (*frm) {
1922b032f27cSSam Leffler 			case IEEE80211_ELEMID_SSID:
1923b032f27cSSam Leffler 				ssid = frm;
1924b032f27cSSam Leffler 				break;
1925b032f27cSSam Leffler 			case IEEE80211_ELEMID_RATES:
1926b032f27cSSam Leffler 				rates = frm;
1927b032f27cSSam Leffler 				break;
1928b032f27cSSam Leffler 			case IEEE80211_ELEMID_XRATES:
1929b032f27cSSam Leffler 				xrates = frm;
1930b032f27cSSam Leffler 				break;
1931b032f27cSSam Leffler 			case IEEE80211_ELEMID_RSN:
1932b032f27cSSam Leffler 				rsn = frm;
1933b032f27cSSam Leffler 				break;
1934b032f27cSSam Leffler 			case IEEE80211_ELEMID_HTCAP:
1935b032f27cSSam Leffler 				htcap = frm;
1936b032f27cSSam Leffler 				break;
1937b032f27cSSam Leffler 			case IEEE80211_ELEMID_VENDOR:
1938b032f27cSSam Leffler 				if (iswpaoui(frm))
1939b032f27cSSam Leffler 					wpa = frm;
1940b032f27cSSam Leffler 				else if (iswmeinfo(frm))
1941b032f27cSSam Leffler 					wme = frm;
1942616190d0SSam Leffler #ifdef IEEE80211_SUPPORT_SUPERG
1943b032f27cSSam Leffler 				else if (isatherosoui(frm))
1944b032f27cSSam Leffler 					ath = frm;
1945616190d0SSam Leffler #endif
1946b032f27cSSam Leffler 				else if (vap->iv_flags_ext & IEEE80211_FEXT_HTCOMPAT) {
1947b032f27cSSam Leffler 					if (ishtcapoui(frm) && htcap == NULL)
1948b032f27cSSam Leffler 						htcap = frm;
1949b032f27cSSam Leffler 				}
1950b032f27cSSam Leffler 				break;
1951b032f27cSSam Leffler 			}
1952b032f27cSSam Leffler 			frm += frm[1] + 2;
1953b032f27cSSam Leffler 		}
1954b032f27cSSam Leffler 		IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
1955b032f27cSSam Leffler 		if (xrates != NULL)
1956b032f27cSSam Leffler 			IEEE80211_VERIFY_ELEMENT(xrates,
1957b032f27cSSam Leffler 				IEEE80211_RATE_MAXSIZE - rates[1], return);
1958b032f27cSSam Leffler 		IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
1959b032f27cSSam Leffler 		IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return);
1960b032f27cSSam Leffler 		if (htcap != NULL) {
1961b032f27cSSam Leffler 			IEEE80211_VERIFY_LENGTH(htcap[1],
1962b032f27cSSam Leffler 			     htcap[0] == IEEE80211_ELEMID_VENDOR ?
1963b032f27cSSam Leffler 			         4 + sizeof(struct ieee80211_ie_htcap)-2 :
1964b032f27cSSam Leffler 			         sizeof(struct ieee80211_ie_htcap)-2,
1965b032f27cSSam Leffler 			     return);		/* XXX just NULL out? */
1966b032f27cSSam Leffler 		}
1967b032f27cSSam Leffler 
1968b032f27cSSam Leffler 		if ((vap->iv_flags & IEEE80211_F_WPA) &&
1969b032f27cSSam Leffler 		    !wpa_assocreq(ni, &rsnparms, wh, wpa, rsn, capinfo))
1970b032f27cSSam Leffler 			return;
1971b032f27cSSam Leffler 		/* discard challenge after association */
1972b032f27cSSam Leffler 		if (ni->ni_challenge != NULL) {
1973e2126decSSam Leffler 			free(ni->ni_challenge, M_80211_NODE);
1974b032f27cSSam Leffler 			ni->ni_challenge = NULL;
1975b032f27cSSam Leffler 		}
1976b032f27cSSam Leffler 		/* NB: 802.11 spec says to ignore station's privacy bit */
1977b032f27cSSam Leffler 		if ((capinfo & IEEE80211_CAPINFO_ESS) == 0) {
1978b032f27cSSam Leffler 			capinfomismatch(ni, wh, reassoc, resp,
1979b032f27cSSam Leffler 			    "capability", capinfo);
1980b032f27cSSam Leffler 			return;
1981b032f27cSSam Leffler 		}
1982b032f27cSSam Leffler 		/*
1983b032f27cSSam Leffler 		 * Disallow re-associate w/ invalid slot time setting.
1984b032f27cSSam Leffler 		 */
1985b032f27cSSam Leffler 		if (ni->ni_associd != 0 &&
1986b032f27cSSam Leffler 		    IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
1987b032f27cSSam Leffler 		    ((ni->ni_capinfo ^ capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME)) {
1988b032f27cSSam Leffler 			capinfomismatch(ni, wh, reassoc, resp,
1989b032f27cSSam Leffler 			    "slot time", capinfo);
1990b032f27cSSam Leffler 			return;
1991b032f27cSSam Leffler 		}
1992b032f27cSSam Leffler 		rate = ieee80211_setup_rates(ni, rates, xrates,
1993b032f27cSSam Leffler 				IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
1994b032f27cSSam Leffler 				IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
1995b032f27cSSam Leffler 		if (rate & IEEE80211_RATE_BASIC) {
1996b032f27cSSam Leffler 			ratesetmismatch(ni, wh, reassoc, resp, "legacy", rate);
1997b032f27cSSam Leffler 			vap->iv_stats.is_rx_assoc_norate++;
1998b032f27cSSam Leffler 			return;
1999b032f27cSSam Leffler 		}
2000b032f27cSSam Leffler 		/*
2001b032f27cSSam Leffler 		 * If constrained to 11g-only stations reject an
2002b032f27cSSam Leffler 		 * 11b-only station.  We cheat a bit here by looking
2003b032f27cSSam Leffler 		 * at the max negotiated xmit rate and assuming anyone
2004b032f27cSSam Leffler 		 * with a best rate <24Mb/s is an 11b station.
2005b032f27cSSam Leffler 		 */
2006b032f27cSSam Leffler 		if ((vap->iv_flags & IEEE80211_F_PUREG) && rate < 48) {
2007b032f27cSSam Leffler 			ratesetmismatch(ni, wh, reassoc, resp, "11g", rate);
2008b032f27cSSam Leffler 			vap->iv_stats.is_rx_assoc_norate++;
2009b032f27cSSam Leffler 			return;
2010b032f27cSSam Leffler 		}
2011b032f27cSSam Leffler 		/*
2012b032f27cSSam Leffler 		 * Do HT rate set handling and setup HT node state.
2013b032f27cSSam Leffler 		 */
2014b032f27cSSam Leffler 		ni->ni_chan = vap->iv_bss->ni_chan;
2015b032f27cSSam Leffler 		if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && htcap != NULL) {
2016b032f27cSSam Leffler 			rate = ieee80211_setup_htrates(ni, htcap,
2017b032f27cSSam Leffler 				IEEE80211_F_DOFMCS | IEEE80211_F_DONEGO |
2018b032f27cSSam Leffler 				IEEE80211_F_DOBRS);
2019b032f27cSSam Leffler 			if (rate & IEEE80211_RATE_BASIC) {
2020b032f27cSSam Leffler 				ratesetmismatch(ni, wh, reassoc, resp,
2021b032f27cSSam Leffler 				    "HT", rate);
2022b032f27cSSam Leffler 				vap->iv_stats.is_ht_assoc_norate++;
2023b032f27cSSam Leffler 				return;
2024b032f27cSSam Leffler 			}
2025fdabd982SSam Leffler 			ieee80211_ht_node_init(ni);
2026fdabd982SSam Leffler 			ieee80211_ht_updatehtcap(ni, htcap);
2027b032f27cSSam Leffler 		} else if (ni->ni_flags & IEEE80211_NODE_HT)
2028b032f27cSSam Leffler 			ieee80211_ht_node_cleanup(ni);
2029339ccfb3SSam Leffler #ifdef IEEE80211_SUPPORT_SUPERG
2030339ccfb3SSam Leffler 		else if (ni->ni_ath_flags & IEEE80211_NODE_ATH)
2031339ccfb3SSam Leffler 			ieee80211_ff_node_cleanup(ni);
2032339ccfb3SSam Leffler #endif
2033b032f27cSSam Leffler 		/*
2034b032f27cSSam Leffler 		 * Allow AMPDU operation only with unencrypted traffic
2035b032f27cSSam Leffler 		 * or AES-CCM; the 11n spec only specifies these ciphers
2036b032f27cSSam Leffler 		 * so permitting any others is undefined and can lead
2037b032f27cSSam Leffler 		 * to interoperability problems.
2038b032f27cSSam Leffler 		 */
2039b032f27cSSam Leffler 		if ((ni->ni_flags & IEEE80211_NODE_HT) &&
2040b032f27cSSam Leffler 		    (((vap->iv_flags & IEEE80211_F_WPA) &&
2041b032f27cSSam Leffler 		      rsnparms.rsn_ucastcipher != IEEE80211_CIPHER_AES_CCM) ||
2042b032f27cSSam Leffler 		     (vap->iv_flags & (IEEE80211_F_WPA|IEEE80211_F_PRIVACY)) == IEEE80211_F_PRIVACY)) {
2043b032f27cSSam Leffler 			IEEE80211_NOTE(vap,
2044b032f27cSSam Leffler 			    IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni,
2045b032f27cSSam Leffler 			    "disallow HT use because WEP or TKIP requested, "
2046b032f27cSSam Leffler 			    "capinfo 0x%x ucastcipher %d", capinfo,
2047b032f27cSSam Leffler 			    rsnparms.rsn_ucastcipher);
2048b032f27cSSam Leffler 			ieee80211_ht_node_cleanup(ni);
2049b032f27cSSam Leffler 			vap->iv_stats.is_ht_assoc_downgrade++;
2050b032f27cSSam Leffler 		}
2051b032f27cSSam Leffler 		/*
2052b032f27cSSam Leffler 		 * If constrained to 11n-only stations reject legacy stations.
2053b032f27cSSam Leffler 		 */
2054b032f27cSSam Leffler 		if ((vap->iv_flags_ext & IEEE80211_FEXT_PUREN) &&
2055b032f27cSSam Leffler 		    (ni->ni_flags & IEEE80211_NODE_HT) == 0) {
2056b032f27cSSam Leffler 			htcapmismatch(ni, wh, reassoc, resp);
2057b032f27cSSam Leffler 			vap->iv_stats.is_ht_assoc_nohtcap++;
2058b032f27cSSam Leffler 			return;
2059b032f27cSSam Leffler 		}
2060b032f27cSSam Leffler 		IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
20615463c4a4SSam Leffler 		ni->ni_noise = nf;
2062b032f27cSSam Leffler 		ni->ni_intval = lintval;
2063b032f27cSSam Leffler 		ni->ni_capinfo = capinfo;
2064b032f27cSSam Leffler 		ni->ni_fhdwell = vap->iv_bss->ni_fhdwell;
2065b032f27cSSam Leffler 		ni->ni_fhindex = vap->iv_bss->ni_fhindex;
2066b032f27cSSam Leffler 		/*
2067b032f27cSSam Leffler 		 * Store the IEs.
2068b032f27cSSam Leffler 		 * XXX maybe better to just expand
2069b032f27cSSam Leffler 		 */
2070b032f27cSSam Leffler 		if (ieee80211_ies_init(&ni->ni_ies, sfrm, efrm - sfrm)) {
2071b032f27cSSam Leffler #define	setie(_ie, _off)	ieee80211_ies_setie(ni->ni_ies, _ie, _off)
2072b032f27cSSam Leffler 			if (wpa != NULL)
2073b032f27cSSam Leffler 				setie(wpa_ie, wpa - sfrm);
2074b032f27cSSam Leffler 			if (rsn != NULL)
2075b032f27cSSam Leffler 				setie(rsn_ie, rsn - sfrm);
2076b032f27cSSam Leffler 			if (htcap != NULL)
2077b032f27cSSam Leffler 				setie(htcap_ie, htcap - sfrm);
2078b032f27cSSam Leffler 			if (wme != NULL) {
2079b032f27cSSam Leffler 				setie(wme_ie, wme - sfrm);
2080b032f27cSSam Leffler 				/*
2081b032f27cSSam Leffler 				 * Mark node as capable of QoS.
2082b032f27cSSam Leffler 				 */
2083b032f27cSSam Leffler 				ni->ni_flags |= IEEE80211_NODE_QOS;
2084b032f27cSSam Leffler 			} else
2085b032f27cSSam Leffler 				ni->ni_flags &= ~IEEE80211_NODE_QOS;
2086616190d0SSam Leffler #ifdef IEEE80211_SUPPORT_SUPERG
2087b032f27cSSam Leffler 			if (ath != NULL) {
2088b032f27cSSam Leffler 				setie(ath_ie, ath - sfrm);
2089b032f27cSSam Leffler 				/*
2090b032f27cSSam Leffler 				 * Parse ATH station parameters.
2091b032f27cSSam Leffler 				 */
2092b032f27cSSam Leffler 				ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
2093b032f27cSSam Leffler 			} else
2094616190d0SSam Leffler #endif
2095b032f27cSSam Leffler 				ni->ni_ath_flags = 0;
2096b032f27cSSam Leffler #undef setie
2097b032f27cSSam Leffler 		} else {
2098b032f27cSSam Leffler 			ni->ni_flags &= ~IEEE80211_NODE_QOS;
2099b032f27cSSam Leffler 			ni->ni_ath_flags = 0;
2100b032f27cSSam Leffler 		}
2101b032f27cSSam Leffler 		ieee80211_node_join(ni, resp);
2102b032f27cSSam Leffler 		ieee80211_deliver_l2uf(ni);
2103b032f27cSSam Leffler 		break;
2104b032f27cSSam Leffler 	}
2105b032f27cSSam Leffler 
2106b032f27cSSam Leffler 	case IEEE80211_FC0_SUBTYPE_DEAUTH:
2107b032f27cSSam Leffler 	case IEEE80211_FC0_SUBTYPE_DISASSOC: {
2108b032f27cSSam Leffler 		uint16_t reason;
2109b032f27cSSam Leffler 
2110b032f27cSSam Leffler 		if (vap->iv_state != IEEE80211_S_RUN ||
2111b032f27cSSam Leffler 		    /* NB: can happen when in promiscuous mode */
2112b032f27cSSam Leffler 		    !IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) {
2113b032f27cSSam Leffler 			vap->iv_stats.is_rx_mgtdiscard++;
2114b032f27cSSam Leffler 			break;
2115b032f27cSSam Leffler 		}
2116b032f27cSSam Leffler 		/*
2117b032f27cSSam Leffler 		 * deauth/disassoc frame format
2118b032f27cSSam Leffler 		 *	[2] reason
2119b032f27cSSam Leffler 		 */
2120b032f27cSSam Leffler 		IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return);
2121b032f27cSSam Leffler 		reason = le16toh(*(uint16_t *)frm);
2122b032f27cSSam Leffler 		if (subtype == IEEE80211_FC0_SUBTYPE_DEAUTH) {
2123b032f27cSSam Leffler 			vap->iv_stats.is_rx_deauth++;
2124b032f27cSSam Leffler 			IEEE80211_NODE_STAT(ni, rx_deauth);
2125b032f27cSSam Leffler 		} else {
2126b032f27cSSam Leffler 			vap->iv_stats.is_rx_disassoc++;
2127b032f27cSSam Leffler 			IEEE80211_NODE_STAT(ni, rx_disassoc);
2128b032f27cSSam Leffler 		}
2129b032f27cSSam Leffler 		IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni,
2130b032f27cSSam Leffler 		    "recv %s (reason %d)", ieee80211_mgt_subtype_name[subtype >>
2131b032f27cSSam Leffler 			IEEE80211_FC0_SUBTYPE_SHIFT], reason);
2132b032f27cSSam Leffler 		if (ni != vap->iv_bss)
2133b032f27cSSam Leffler 			ieee80211_node_leave(ni);
2134b032f27cSSam Leffler 		break;
2135b032f27cSSam Leffler 	}
2136b032f27cSSam Leffler 
2137b032f27cSSam Leffler 	case IEEE80211_FC0_SUBTYPE_ACTION:
2138b032f27cSSam Leffler 		if (vap->iv_state == IEEE80211_S_RUN) {
2139b032f27cSSam Leffler 			if (ieee80211_parse_action(ni, m0) == 0)
2140b032f27cSSam Leffler 				ic->ic_recv_action(ni, frm, efrm);
2141b032f27cSSam Leffler 		} else
2142b032f27cSSam Leffler 			vap->iv_stats.is_rx_mgtdiscard++;
2143b032f27cSSam Leffler 		break;
2144b032f27cSSam Leffler 
2145b032f27cSSam Leffler 	case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2146b032f27cSSam Leffler 	case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2147b032f27cSSam Leffler 	default:
2148b032f27cSSam Leffler 		IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2149b032f27cSSam Leffler 		     wh, "mgt", "subtype 0x%x not handled", subtype);
2150b032f27cSSam Leffler 		vap->iv_stats.is_rx_badsubtype++;
2151b032f27cSSam Leffler 		break;
2152b032f27cSSam Leffler 	}
2153b032f27cSSam Leffler }
2154b032f27cSSam Leffler 
215549eae5f7SSam Leffler static void
215649eae5f7SSam Leffler hostap_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
215749eae5f7SSam Leffler {
215849eae5f7SSam Leffler 	switch (subtype) {
215949eae5f7SSam Leffler 	case IEEE80211_FC0_SUBTYPE_PS_POLL:
216049eae5f7SSam Leffler 		hostap_recv_pspoll(ni, m);
216149eae5f7SSam Leffler 		break;
216249eae5f7SSam Leffler 	case IEEE80211_FC0_SUBTYPE_BAR:
216349eae5f7SSam Leffler 		ieee80211_recv_bar(ni, m);
216449eae5f7SSam Leffler 		break;
216549eae5f7SSam Leffler 	}
216649eae5f7SSam Leffler }
216749eae5f7SSam Leffler 
2168b032f27cSSam Leffler /*
2169b032f27cSSam Leffler  * Process a received ps-poll frame.
2170b032f27cSSam Leffler  */
2171b032f27cSSam Leffler static void
2172b032f27cSSam Leffler hostap_recv_pspoll(struct ieee80211_node *ni, struct mbuf *m0)
2173b032f27cSSam Leffler {
2174b032f27cSSam Leffler 	struct ieee80211vap *vap = ni->ni_vap;
2175b032f27cSSam Leffler 	struct ieee80211_frame_min *wh;
217663092fceSSam Leffler 	struct ifnet *ifp;
2177b032f27cSSam Leffler 	struct mbuf *m;
2178b032f27cSSam Leffler 	uint16_t aid;
2179b032f27cSSam Leffler 	int qlen;
2180b032f27cSSam Leffler 
2181b032f27cSSam Leffler 	wh = mtod(m0, struct ieee80211_frame_min *);
2182b032f27cSSam Leffler 	if (ni->ni_associd == 0) {
2183b032f27cSSam Leffler 		IEEE80211_DISCARD(vap,
2184b032f27cSSam Leffler 		    IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG,
2185b032f27cSSam Leffler 		    (struct ieee80211_frame *) wh, NULL,
2186b032f27cSSam Leffler 		    "%s", "unassociated station");
2187b032f27cSSam Leffler 		vap->iv_stats.is_ps_unassoc++;
2188b032f27cSSam Leffler 		IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH,
2189b032f27cSSam Leffler 			IEEE80211_REASON_NOT_ASSOCED);
2190b032f27cSSam Leffler 		return;
2191b032f27cSSam Leffler 	}
2192b032f27cSSam Leffler 
2193b032f27cSSam Leffler 	aid = le16toh(*(uint16_t *)wh->i_dur);
2194b032f27cSSam Leffler 	if (aid != ni->ni_associd) {
2195b032f27cSSam Leffler 		IEEE80211_DISCARD(vap,
2196b032f27cSSam Leffler 		    IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG,
2197b032f27cSSam Leffler 		    (struct ieee80211_frame *) wh, NULL,
2198b032f27cSSam Leffler 		    "aid mismatch: sta aid 0x%x poll aid 0x%x",
2199b032f27cSSam Leffler 		    ni->ni_associd, aid);
2200b032f27cSSam Leffler 		vap->iv_stats.is_ps_badaid++;
2201693e3122SSam Leffler 		/*
2202693e3122SSam Leffler 		 * NB: We used to deauth the station but it turns out
2203693e3122SSam Leffler 		 * the Blackberry Curve 8230 (and perhaps other devices)
2204693e3122SSam Leffler 		 * sometimes send the wrong AID when WME is negotiated.
2205693e3122SSam Leffler 		 * Being more lenient here seems ok as we already check
2206693e3122SSam Leffler 		 * the station is associated and we only return frames
2207693e3122SSam Leffler 		 * queued for the station (i.e. we don't use the AID).
2208693e3122SSam Leffler 		 */
2209b032f27cSSam Leffler 		return;
2210b032f27cSSam Leffler 	}
2211b032f27cSSam Leffler 
2212b032f27cSSam Leffler 	/* Okay, take the first queued packet and put it out... */
221363092fceSSam Leffler 	m = ieee80211_node_psq_dequeue(ni, &qlen);
2214b032f27cSSam Leffler 	if (m == NULL) {
2215b032f27cSSam Leffler 		IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_POWER, wh->i_addr2,
2216b032f27cSSam Leffler 		    "%s", "recv ps-poll, but queue empty");
2217b032f27cSSam Leffler 		ieee80211_send_nulldata(ieee80211_ref_node(ni));
2218b032f27cSSam Leffler 		vap->iv_stats.is_ps_qempty++;	/* XXX node stat */
2219b032f27cSSam Leffler 		if (vap->iv_set_tim != NULL)
2220b032f27cSSam Leffler 			vap->iv_set_tim(ni, 0);	/* just in case */
2221b032f27cSSam Leffler 		return;
2222b032f27cSSam Leffler 	}
2223b032f27cSSam Leffler 	/*
2224b032f27cSSam Leffler 	 * If there are more packets, set the more packets bit
2225b032f27cSSam Leffler 	 * in the packet dispatched to the station; otherwise
2226b032f27cSSam Leffler 	 * turn off the TIM bit.
2227b032f27cSSam Leffler 	 */
2228b032f27cSSam Leffler 	if (qlen != 0) {
2229b032f27cSSam Leffler 		IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
2230b032f27cSSam Leffler 		    "recv ps-poll, send packet, %u still queued", qlen);
2231b032f27cSSam Leffler 		m->m_flags |= M_MORE_DATA;
2232b032f27cSSam Leffler 	} else {
2233b032f27cSSam Leffler 		IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
2234b032f27cSSam Leffler 		    "%s", "recv ps-poll, send packet, queue empty");
2235b032f27cSSam Leffler 		if (vap->iv_set_tim != NULL)
2236b032f27cSSam Leffler 			vap->iv_set_tim(ni, 0);
2237b032f27cSSam Leffler 	}
2238b032f27cSSam Leffler 	m->m_flags |= M_PWR_SAV;		/* bypass PS handling */
223963092fceSSam Leffler 
224063092fceSSam Leffler 	if (m->m_flags & M_ENCAP)
224163092fceSSam Leffler 		ifp = vap->iv_ic->ic_ifp;
224263092fceSSam Leffler 	else
224363092fceSSam Leffler 		ifp = vap->iv_ifp;
2244b032f27cSSam Leffler 	IF_ENQUEUE(&ifp->if_snd, m);
2245b032f27cSSam Leffler 	if_start(ifp);
2246b032f27cSSam Leffler }
2247