ieee80211_freebsd.c revision 283538
1/*-
2 * Copyright (c) 2003-2009 Sam Leffler, Errno Consulting
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include <sys/cdefs.h>
27__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_freebsd.c 283538 2015-05-25 19:18:16Z adrian $");
28
29/*
30 * IEEE 802.11 support (FreeBSD-specific code)
31 */
32#include "opt_wlan.h"
33
34#include <sys/param.h>
35#include <sys/kernel.h>
36#include <sys/systm.h>
37#include <sys/linker.h>
38#include <sys/mbuf.h>
39#include <sys/module.h>
40#include <sys/proc.h>
41#include <sys/sysctl.h>
42
43#include <sys/socket.h>
44
45#include <net/bpf.h>
46#include <net/if.h>
47#include <net/if_var.h>
48#include <net/if_dl.h>
49#include <net/if_clone.h>
50#include <net/if_media.h>
51#include <net/if_types.h>
52#include <net/ethernet.h>
53#include <net/route.h>
54#include <net/vnet.h>
55
56#include <net80211/ieee80211_var.h>
57#include <net80211/ieee80211_input.h>
58
59SYSCTL_NODE(_net, OID_AUTO, wlan, CTLFLAG_RD, 0, "IEEE 80211 parameters");
60
61#ifdef IEEE80211_DEBUG
62int	ieee80211_debug = 0;
63SYSCTL_INT(_net_wlan, OID_AUTO, debug, CTLFLAG_RW, &ieee80211_debug,
64	    0, "debugging printfs");
65#endif
66
67static MALLOC_DEFINE(M_80211_COM, "80211com", "802.11 com state");
68
69#if __FreeBSD_version >= 1000020
70static const char wlanname[] = "wlan";
71static struct if_clone *wlan_cloner;
72#endif
73
74/*
75 * Allocate/free com structure in conjunction with ifnet;
76 * these routines are registered with if_register_com_alloc
77 * below and are called automatically by the ifnet code
78 * when the ifnet of the parent device is created.
79 */
80static void *
81wlan_alloc(u_char type, struct ifnet *ifp)
82{
83	struct ieee80211com *ic;
84
85	ic = IEEE80211_MALLOC(sizeof(struct ieee80211com), M_80211_COM,
86	    IEEE80211_M_WAITOK | IEEE80211_M_ZERO);
87	ic->ic_ifp = ifp;
88
89	return (ic);
90}
91
92static void
93wlan_free(void *ic, u_char type)
94{
95	IEEE80211_FREE(ic, M_80211_COM);
96}
97
98static int
99wlan_clone_create(struct if_clone *ifc, int unit, caddr_t params)
100{
101	struct ieee80211_clone_params cp;
102	struct ieee80211vap *vap;
103	struct ieee80211com *ic;
104	struct ifnet *ifp;
105	int error;
106
107	error = copyin(params, &cp, sizeof(cp));
108	if (error)
109		return error;
110	ifp = ifunit(cp.icp_parent);
111	if (ifp == NULL)
112		return ENXIO;
113	/* XXX move printfs to DIAGNOSTIC before release */
114	if (ifp->if_type != IFT_IEEE80211) {
115		if_printf(ifp, "%s: reject, not an 802.11 device\n", __func__);
116		return ENXIO;
117	}
118	if (cp.icp_opmode >= IEEE80211_OPMODE_MAX) {
119		if_printf(ifp, "%s: invalid opmode %d\n",
120		    __func__, cp.icp_opmode);
121		return EINVAL;
122	}
123	ic = ifp->if_l2com;
124	if ((ic->ic_caps & ieee80211_opcap[cp.icp_opmode]) == 0) {
125		if_printf(ifp, "%s mode not supported\n",
126		    ieee80211_opmode_name[cp.icp_opmode]);
127		return EOPNOTSUPP;
128	}
129	if ((cp.icp_flags & IEEE80211_CLONE_TDMA) &&
130#ifdef IEEE80211_SUPPORT_TDMA
131	    (ic->ic_caps & IEEE80211_C_TDMA) == 0
132#else
133	    (1)
134#endif
135	) {
136		if_printf(ifp, "TDMA not supported\n");
137		return EOPNOTSUPP;
138	}
139#if __FreeBSD_version >= 1000020
140	vap = ic->ic_vap_create(ic, wlanname, unit,
141			cp.icp_opmode, cp.icp_flags, cp.icp_bssid,
142			cp.icp_flags & IEEE80211_CLONE_MACADDR ?
143			    cp.icp_macaddr : (const uint8_t *)IF_LLADDR(ifp));
144#else
145	vap = ic->ic_vap_create(ic, ifc->ifc_name, unit,
146			cp.icp_opmode, cp.icp_flags, cp.icp_bssid,
147			cp.icp_flags & IEEE80211_CLONE_MACADDR ?
148			    cp.icp_macaddr : (const uint8_t *)IF_LLADDR(ifp));
149
150#endif
151
152	return (vap == NULL ? EIO : 0);
153}
154
155static void
156wlan_clone_destroy(struct ifnet *ifp)
157{
158	struct ieee80211vap *vap = ifp->if_softc;
159	struct ieee80211com *ic = vap->iv_ic;
160
161	ic->ic_vap_delete(vap);
162}
163
164#if __FreeBSD_version < 1000020
165IFC_SIMPLE_DECLARE(wlan, 0);
166#endif
167
168void
169ieee80211_vap_destroy(struct ieee80211vap *vap)
170{
171	CURVNET_SET(vap->iv_ifp->if_vnet);
172#if __FreeBSD_version >= 1000020
173	if_clone_destroyif(wlan_cloner, vap->iv_ifp);
174#else
175	if_clone_destroyif(&wlan_cloner, vap->iv_ifp);
176#endif
177	CURVNET_RESTORE();
178}
179
180int
181ieee80211_sysctl_msecs_ticks(SYSCTL_HANDLER_ARGS)
182{
183	int msecs = ticks_to_msecs(*(int *)arg1);
184	int error, t;
185
186	error = sysctl_handle_int(oidp, &msecs, 0, req);
187	if (error || !req->newptr)
188		return error;
189	t = msecs_to_ticks(msecs);
190	*(int *)arg1 = (t < 1) ? 1 : t;
191	return 0;
192}
193
194static int
195ieee80211_sysctl_inact(SYSCTL_HANDLER_ARGS)
196{
197	int inact = (*(int *)arg1) * IEEE80211_INACT_WAIT;
198	int error;
199
200	error = sysctl_handle_int(oidp, &inact, 0, req);
201	if (error || !req->newptr)
202		return error;
203	*(int *)arg1 = inact / IEEE80211_INACT_WAIT;
204	return 0;
205}
206
207static int
208ieee80211_sysctl_parent(SYSCTL_HANDLER_ARGS)
209{
210	struct ieee80211com *ic = arg1;
211
212	return SYSCTL_OUT_STR(req, ic->ic_name);
213}
214
215static int
216ieee80211_sysctl_radar(SYSCTL_HANDLER_ARGS)
217{
218	struct ieee80211com *ic = arg1;
219	int t = 0, error;
220
221	error = sysctl_handle_int(oidp, &t, 0, req);
222	if (error || !req->newptr)
223		return error;
224	IEEE80211_LOCK(ic);
225	ieee80211_dfs_notify_radar(ic, ic->ic_curchan);
226	IEEE80211_UNLOCK(ic);
227	return 0;
228}
229
230void
231ieee80211_sysctl_attach(struct ieee80211com *ic)
232{
233}
234
235void
236ieee80211_sysctl_detach(struct ieee80211com *ic)
237{
238}
239
240void
241ieee80211_sysctl_vattach(struct ieee80211vap *vap)
242{
243	struct ifnet *ifp = vap->iv_ifp;
244	struct sysctl_ctx_list *ctx;
245	struct sysctl_oid *oid;
246	char num[14];			/* sufficient for 32 bits */
247
248	ctx = (struct sysctl_ctx_list *) IEEE80211_MALLOC(sizeof(struct sysctl_ctx_list),
249		M_DEVBUF, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
250	if (ctx == NULL) {
251		if_printf(ifp, "%s: cannot allocate sysctl context!\n",
252			__func__);
253		return;
254	}
255	sysctl_ctx_init(ctx);
256	snprintf(num, sizeof(num), "%u", ifp->if_dunit);
257	oid = SYSCTL_ADD_NODE(ctx, &SYSCTL_NODE_CHILDREN(_net, wlan),
258		OID_AUTO, num, CTLFLAG_RD, NULL, "");
259	SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
260		"%parent", CTLTYPE_STRING | CTLFLAG_RD, vap->iv_ic, 0,
261		ieee80211_sysctl_parent, "A", "parent device");
262	SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
263		"driver_caps", CTLFLAG_RW, &vap->iv_caps, 0,
264		"driver capabilities");
265#ifdef IEEE80211_DEBUG
266	vap->iv_debug = ieee80211_debug;
267	SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
268		"debug", CTLFLAG_RW, &vap->iv_debug, 0,
269		"control debugging printfs");
270#endif
271	SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
272		"bmiss_max", CTLFLAG_RW, &vap->iv_bmiss_max, 0,
273		"consecutive beacon misses before scanning");
274	/* XXX inherit from tunables */
275	SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
276		"inact_run", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_run, 0,
277		ieee80211_sysctl_inact, "I",
278		"station inactivity timeout (sec)");
279	SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
280		"inact_probe", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_probe, 0,
281		ieee80211_sysctl_inact, "I",
282		"station inactivity probe timeout (sec)");
283	SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
284		"inact_auth", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_auth, 0,
285		ieee80211_sysctl_inact, "I",
286		"station authentication timeout (sec)");
287	SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
288		"inact_init", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_init, 0,
289		ieee80211_sysctl_inact, "I",
290		"station initial state timeout (sec)");
291	if (vap->iv_htcaps & IEEE80211_HTC_HT) {
292		SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
293			"ampdu_mintraffic_bk", CTLFLAG_RW,
294			&vap->iv_ampdu_mintraffic[WME_AC_BK], 0,
295			"BK traffic tx aggr threshold (pps)");
296		SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
297			"ampdu_mintraffic_be", CTLFLAG_RW,
298			&vap->iv_ampdu_mintraffic[WME_AC_BE], 0,
299			"BE traffic tx aggr threshold (pps)");
300		SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
301			"ampdu_mintraffic_vo", CTLFLAG_RW,
302			&vap->iv_ampdu_mintraffic[WME_AC_VO], 0,
303			"VO traffic tx aggr threshold (pps)");
304		SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
305			"ampdu_mintraffic_vi", CTLFLAG_RW,
306			&vap->iv_ampdu_mintraffic[WME_AC_VI], 0,
307			"VI traffic tx aggr threshold (pps)");
308	}
309	if (vap->iv_caps & IEEE80211_C_DFS) {
310		SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
311			"radar", CTLTYPE_INT | CTLFLAG_RW, vap->iv_ic, 0,
312			ieee80211_sysctl_radar, "I", "simulate radar event");
313	}
314	vap->iv_sysctl = ctx;
315	vap->iv_oid = oid;
316}
317
318void
319ieee80211_sysctl_vdetach(struct ieee80211vap *vap)
320{
321
322	if (vap->iv_sysctl != NULL) {
323		sysctl_ctx_free(vap->iv_sysctl);
324		IEEE80211_FREE(vap->iv_sysctl, M_DEVBUF);
325		vap->iv_sysctl = NULL;
326	}
327}
328
329int
330ieee80211_node_dectestref(struct ieee80211_node *ni)
331{
332	/* XXX need equivalent of atomic_dec_and_test */
333	atomic_subtract_int(&ni->ni_refcnt, 1);
334	return atomic_cmpset_int(&ni->ni_refcnt, 0, 1);
335}
336
337void
338ieee80211_drain_ifq(struct ifqueue *ifq)
339{
340	struct ieee80211_node *ni;
341	struct mbuf *m;
342
343	for (;;) {
344		IF_DEQUEUE(ifq, m);
345		if (m == NULL)
346			break;
347
348		ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
349		KASSERT(ni != NULL, ("frame w/o node"));
350		ieee80211_free_node(ni);
351		m->m_pkthdr.rcvif = NULL;
352
353		m_freem(m);
354	}
355}
356
357void
358ieee80211_flush_ifq(struct ifqueue *ifq, struct ieee80211vap *vap)
359{
360	struct ieee80211_node *ni;
361	struct mbuf *m, **mprev;
362
363	IF_LOCK(ifq);
364	mprev = &ifq->ifq_head;
365	while ((m = *mprev) != NULL) {
366		ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
367		if (ni != NULL && ni->ni_vap == vap) {
368			*mprev = m->m_nextpkt;		/* remove from list */
369			ifq->ifq_len--;
370
371			m_freem(m);
372			ieee80211_free_node(ni);	/* reclaim ref */
373		} else
374			mprev = &m->m_nextpkt;
375	}
376	/* recalculate tail ptr */
377	m = ifq->ifq_head;
378	for (; m != NULL && m->m_nextpkt != NULL; m = m->m_nextpkt)
379		;
380	ifq->ifq_tail = m;
381	IF_UNLOCK(ifq);
382}
383
384/*
385 * As above, for mbufs allocated with m_gethdr/MGETHDR
386 * or initialized by M_COPY_PKTHDR.
387 */
388#define	MC_ALIGN(m, len)						\
389do {									\
390	(m)->m_data += (MCLBYTES - (len)) &~ (sizeof(long) - 1);	\
391} while (/* CONSTCOND */ 0)
392
393/*
394 * Allocate and setup a management frame of the specified
395 * size.  We return the mbuf and a pointer to the start
396 * of the contiguous data area that's been reserved based
397 * on the packet length.  The data area is forced to 32-bit
398 * alignment and the buffer length to a multiple of 4 bytes.
399 * This is done mainly so beacon frames (that require this)
400 * can use this interface too.
401 */
402struct mbuf *
403ieee80211_getmgtframe(uint8_t **frm, int headroom, int pktlen)
404{
405	struct mbuf *m;
406	u_int len;
407
408	/*
409	 * NB: we know the mbuf routines will align the data area
410	 *     so we don't need to do anything special.
411	 */
412	len = roundup2(headroom + pktlen, 4);
413	KASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len));
414	if (len < MINCLSIZE) {
415		m = m_gethdr(M_NOWAIT, MT_DATA);
416		/*
417		 * Align the data in case additional headers are added.
418		 * This should only happen when a WEP header is added
419		 * which only happens for shared key authentication mgt
420		 * frames which all fit in MHLEN.
421		 */
422		if (m != NULL)
423			M_ALIGN(m, len);
424	} else {
425		m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
426		if (m != NULL)
427			MC_ALIGN(m, len);
428	}
429	if (m != NULL) {
430		m->m_data += headroom;
431		*frm = m->m_data;
432	}
433	return m;
434}
435
436#ifndef __NO_STRICT_ALIGNMENT
437/*
438 * Re-align the payload in the mbuf.  This is mainly used (right now)
439 * to handle IP header alignment requirements on certain architectures.
440 */
441struct mbuf *
442ieee80211_realign(struct ieee80211vap *vap, struct mbuf *m, size_t align)
443{
444	int pktlen, space;
445	struct mbuf *n;
446
447	pktlen = m->m_pkthdr.len;
448	space = pktlen + align;
449	if (space < MINCLSIZE)
450		n = m_gethdr(M_NOWAIT, MT_DATA);
451	else {
452		n = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR,
453		    space <= MCLBYTES ?     MCLBYTES :
454#if MJUMPAGESIZE != MCLBYTES
455		    space <= MJUMPAGESIZE ? MJUMPAGESIZE :
456#endif
457		    space <= MJUM9BYTES ?   MJUM9BYTES : MJUM16BYTES);
458	}
459	if (__predict_true(n != NULL)) {
460		m_move_pkthdr(n, m);
461		n->m_data = (caddr_t)(ALIGN(n->m_data + align) - align);
462		m_copydata(m, 0, pktlen, mtod(n, caddr_t));
463		n->m_len = pktlen;
464	} else {
465		IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
466		    mtod(m, const struct ieee80211_frame *), NULL,
467		    "%s", "no mbuf to realign");
468		vap->iv_stats.is_rx_badalign++;
469	}
470	m_freem(m);
471	return n;
472}
473#endif /* !__NO_STRICT_ALIGNMENT */
474
475int
476ieee80211_add_callback(struct mbuf *m,
477	void (*func)(struct ieee80211_node *, void *, int), void *arg)
478{
479	struct m_tag *mtag;
480	struct ieee80211_cb *cb;
481
482	mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_CALLBACK,
483			sizeof(struct ieee80211_cb), M_NOWAIT);
484	if (mtag == NULL)
485		return 0;
486
487	cb = (struct ieee80211_cb *)(mtag+1);
488	cb->func = func;
489	cb->arg = arg;
490	m_tag_prepend(m, mtag);
491	m->m_flags |= M_TXCB;
492	return 1;
493}
494
495void
496ieee80211_process_callback(struct ieee80211_node *ni,
497	struct mbuf *m, int status)
498{
499	struct m_tag *mtag;
500
501	mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, NULL);
502	if (mtag != NULL) {
503		struct ieee80211_cb *cb = (struct ieee80211_cb *)(mtag+1);
504		cb->func(ni, cb->arg, status);
505	}
506}
507
508/*
509 * Transmit a frame to the parent interface.
510 *
511 * TODO: if the transmission fails, make sure the parent node is freed
512 *   (the callers will first need modifying.)
513 */
514int
515ieee80211_parent_xmitpkt(struct ieee80211com *ic,
516	struct mbuf *m)
517{
518	struct ifnet *parent = ic->ic_ifp;
519	/*
520	 * Assert the IC TX lock is held - this enforces the
521	 * processing -> queuing order is maintained
522	 */
523	IEEE80211_TX_LOCK_ASSERT(ic);
524
525	return (parent->if_transmit(parent, m));
526}
527
528/*
529 * Transmit a frame to the VAP interface.
530 */
531int
532ieee80211_vap_xmitpkt(struct ieee80211vap *vap, struct mbuf *m)
533{
534	struct ifnet *ifp = vap->iv_ifp;
535
536	/*
537	 * When transmitting via the VAP, we shouldn't hold
538	 * any IC TX lock as the VAP TX path will acquire it.
539	 */
540	IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
541
542	return (ifp->if_transmit(ifp, m));
543
544}
545
546#include <sys/libkern.h>
547
548void
549get_random_bytes(void *p, size_t n)
550{
551	uint8_t *dp = p;
552
553	while (n > 0) {
554		uint32_t v = arc4random();
555		size_t nb = n > sizeof(uint32_t) ? sizeof(uint32_t) : n;
556		bcopy(&v, dp, n > sizeof(uint32_t) ? sizeof(uint32_t) : n);
557		dp += sizeof(uint32_t), n -= nb;
558	}
559}
560
561/*
562 * Helper function for events that pass just a single mac address.
563 */
564static void
565notify_macaddr(struct ifnet *ifp, int op, const uint8_t mac[IEEE80211_ADDR_LEN])
566{
567	struct ieee80211_join_event iev;
568
569	CURVNET_SET(ifp->if_vnet);
570	memset(&iev, 0, sizeof(iev));
571	IEEE80211_ADDR_COPY(iev.iev_addr, mac);
572	rt_ieee80211msg(ifp, op, &iev, sizeof(iev));
573	CURVNET_RESTORE();
574}
575
576void
577ieee80211_notify_node_join(struct ieee80211_node *ni, int newassoc)
578{
579	struct ieee80211vap *vap = ni->ni_vap;
580	struct ifnet *ifp = vap->iv_ifp;
581
582	CURVNET_SET_QUIET(ifp->if_vnet);
583	IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode join",
584	    (ni == vap->iv_bss) ? "bss " : "");
585
586	if (ni == vap->iv_bss) {
587		notify_macaddr(ifp, newassoc ?
588		    RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC, ni->ni_bssid);
589		if_link_state_change(ifp, LINK_STATE_UP);
590	} else {
591		notify_macaddr(ifp, newassoc ?
592		    RTM_IEEE80211_JOIN : RTM_IEEE80211_REJOIN, ni->ni_macaddr);
593	}
594	CURVNET_RESTORE();
595}
596
597void
598ieee80211_notify_node_leave(struct ieee80211_node *ni)
599{
600	struct ieee80211vap *vap = ni->ni_vap;
601	struct ifnet *ifp = vap->iv_ifp;
602
603	CURVNET_SET_QUIET(ifp->if_vnet);
604	IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode leave",
605	    (ni == vap->iv_bss) ? "bss " : "");
606
607	if (ni == vap->iv_bss) {
608		rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0);
609		if_link_state_change(ifp, LINK_STATE_DOWN);
610	} else {
611		/* fire off wireless event station leaving */
612		notify_macaddr(ifp, RTM_IEEE80211_LEAVE, ni->ni_macaddr);
613	}
614	CURVNET_RESTORE();
615}
616
617void
618ieee80211_notify_scan_done(struct ieee80211vap *vap)
619{
620	struct ifnet *ifp = vap->iv_ifp;
621
622	IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s\n", "notify scan done");
623
624	/* dispatch wireless event indicating scan completed */
625	CURVNET_SET(ifp->if_vnet);
626	rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0);
627	CURVNET_RESTORE();
628}
629
630void
631ieee80211_notify_replay_failure(struct ieee80211vap *vap,
632	const struct ieee80211_frame *wh, const struct ieee80211_key *k,
633	u_int64_t rsc, int tid)
634{
635	struct ifnet *ifp = vap->iv_ifp;
636
637	IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2,
638	    "%s replay detected tid %d <rsc %ju, csc %ju, keyix %u rxkeyix %u>",
639	    k->wk_cipher->ic_name, tid, (intmax_t) rsc,
640	    (intmax_t) k->wk_keyrsc[tid],
641	    k->wk_keyix, k->wk_rxkeyix);
642
643	if (ifp != NULL) {		/* NB: for cipher test modules */
644		struct ieee80211_replay_event iev;
645
646		IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1);
647		IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2);
648		iev.iev_cipher = k->wk_cipher->ic_cipher;
649		if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE)
650			iev.iev_keyix = k->wk_rxkeyix;
651		else
652			iev.iev_keyix = k->wk_keyix;
653		iev.iev_keyrsc = k->wk_keyrsc[tid];
654		iev.iev_rsc = rsc;
655		CURVNET_SET(ifp->if_vnet);
656		rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev));
657		CURVNET_RESTORE();
658	}
659}
660
661void
662ieee80211_notify_michael_failure(struct ieee80211vap *vap,
663	const struct ieee80211_frame *wh, u_int keyix)
664{
665	struct ifnet *ifp = vap->iv_ifp;
666
667	IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2,
668	    "michael MIC verification failed <keyix %u>", keyix);
669	vap->iv_stats.is_rx_tkipmic++;
670
671	if (ifp != NULL) {		/* NB: for cipher test modules */
672		struct ieee80211_michael_event iev;
673
674		IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1);
675		IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2);
676		iev.iev_cipher = IEEE80211_CIPHER_TKIP;
677		iev.iev_keyix = keyix;
678		CURVNET_SET(ifp->if_vnet);
679		rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev));
680		CURVNET_RESTORE();
681	}
682}
683
684void
685ieee80211_notify_wds_discover(struct ieee80211_node *ni)
686{
687	struct ieee80211vap *vap = ni->ni_vap;
688	struct ifnet *ifp = vap->iv_ifp;
689
690	notify_macaddr(ifp, RTM_IEEE80211_WDS, ni->ni_macaddr);
691}
692
693void
694ieee80211_notify_csa(struct ieee80211com *ic,
695	const struct ieee80211_channel *c, int mode, int count)
696{
697	struct ifnet *ifp = ic->ic_ifp;
698	struct ieee80211_csa_event iev;
699
700	memset(&iev, 0, sizeof(iev));
701	iev.iev_flags = c->ic_flags;
702	iev.iev_freq = c->ic_freq;
703	iev.iev_ieee = c->ic_ieee;
704	iev.iev_mode = mode;
705	iev.iev_count = count;
706	CURVNET_SET(ifp->if_vnet);
707	rt_ieee80211msg(ifp, RTM_IEEE80211_CSA, &iev, sizeof(iev));
708	CURVNET_RESTORE();
709}
710
711void
712ieee80211_notify_radar(struct ieee80211com *ic,
713	const struct ieee80211_channel *c)
714{
715	struct ifnet *ifp = ic->ic_ifp;
716	struct ieee80211_radar_event iev;
717
718	memset(&iev, 0, sizeof(iev));
719	iev.iev_flags = c->ic_flags;
720	iev.iev_freq = c->ic_freq;
721	iev.iev_ieee = c->ic_ieee;
722	CURVNET_SET(ifp->if_vnet);
723	rt_ieee80211msg(ifp, RTM_IEEE80211_RADAR, &iev, sizeof(iev));
724	CURVNET_RESTORE();
725}
726
727void
728ieee80211_notify_cac(struct ieee80211com *ic,
729	const struct ieee80211_channel *c, enum ieee80211_notify_cac_event type)
730{
731	struct ifnet *ifp = ic->ic_ifp;
732	struct ieee80211_cac_event iev;
733
734	memset(&iev, 0, sizeof(iev));
735	iev.iev_flags = c->ic_flags;
736	iev.iev_freq = c->ic_freq;
737	iev.iev_ieee = c->ic_ieee;
738	iev.iev_type = type;
739	CURVNET_SET(ifp->if_vnet);
740	rt_ieee80211msg(ifp, RTM_IEEE80211_CAC, &iev, sizeof(iev));
741	CURVNET_RESTORE();
742}
743
744void
745ieee80211_notify_node_deauth(struct ieee80211_node *ni)
746{
747	struct ieee80211vap *vap = ni->ni_vap;
748	struct ifnet *ifp = vap->iv_ifp;
749
750	IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node deauth");
751
752	notify_macaddr(ifp, RTM_IEEE80211_DEAUTH, ni->ni_macaddr);
753}
754
755void
756ieee80211_notify_node_auth(struct ieee80211_node *ni)
757{
758	struct ieee80211vap *vap = ni->ni_vap;
759	struct ifnet *ifp = vap->iv_ifp;
760
761	IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node auth");
762
763	notify_macaddr(ifp, RTM_IEEE80211_AUTH, ni->ni_macaddr);
764}
765
766void
767ieee80211_notify_country(struct ieee80211vap *vap,
768	const uint8_t bssid[IEEE80211_ADDR_LEN], const uint8_t cc[2])
769{
770	struct ifnet *ifp = vap->iv_ifp;
771	struct ieee80211_country_event iev;
772
773	memset(&iev, 0, sizeof(iev));
774	IEEE80211_ADDR_COPY(iev.iev_addr, bssid);
775	iev.iev_cc[0] = cc[0];
776	iev.iev_cc[1] = cc[1];
777	CURVNET_SET(ifp->if_vnet);
778	rt_ieee80211msg(ifp, RTM_IEEE80211_COUNTRY, &iev, sizeof(iev));
779	CURVNET_RESTORE();
780}
781
782void
783ieee80211_notify_radio(struct ieee80211com *ic, int state)
784{
785	struct ifnet *ifp = ic->ic_ifp;
786	struct ieee80211_radio_event iev;
787
788	memset(&iev, 0, sizeof(iev));
789	iev.iev_state = state;
790	CURVNET_SET(ifp->if_vnet);
791	rt_ieee80211msg(ifp, RTM_IEEE80211_RADIO, &iev, sizeof(iev));
792	CURVNET_RESTORE();
793}
794
795void
796ieee80211_load_module(const char *modname)
797{
798
799#ifdef notyet
800	(void)kern_kldload(curthread, modname, NULL);
801#else
802	printf("%s: load the %s module by hand for now.\n", __func__, modname);
803#endif
804}
805
806static eventhandler_tag wlan_bpfevent;
807static eventhandler_tag wlan_ifllevent;
808
809static void
810bpf_track(void *arg, struct ifnet *ifp, int dlt, int attach)
811{
812	/* NB: identify vap's by if_init */
813	if (dlt == DLT_IEEE802_11_RADIO &&
814	    ifp->if_init == ieee80211_init) {
815		struct ieee80211vap *vap = ifp->if_softc;
816		/*
817		 * Track bpf radiotap listener state.  We mark the vap
818		 * to indicate if any listener is present and the com
819		 * to indicate if any listener exists on any associated
820		 * vap.  This flag is used by drivers to prepare radiotap
821		 * state only when needed.
822		 */
823		if (attach) {
824			ieee80211_syncflag_ext(vap, IEEE80211_FEXT_BPF);
825			if (vap->iv_opmode == IEEE80211_M_MONITOR)
826				atomic_add_int(&vap->iv_ic->ic_montaps, 1);
827		} else if (!bpf_peers_present(vap->iv_rawbpf)) {
828			ieee80211_syncflag_ext(vap, -IEEE80211_FEXT_BPF);
829			if (vap->iv_opmode == IEEE80211_M_MONITOR)
830				atomic_subtract_int(&vap->iv_ic->ic_montaps, 1);
831		}
832	}
833}
834
835static void
836wlan_iflladdr(void *arg __unused, struct ifnet *ifp)
837{
838	struct ieee80211com *ic = ifp->if_l2com;
839	struct ieee80211vap *vap, *next;
840
841	if (ifp->if_type != IFT_IEEE80211 || ic == NULL)
842		return;
843
844	IEEE80211_LOCK(ic);
845	TAILQ_FOREACH_SAFE(vap, &ic->ic_vaps, iv_next, next) {
846		/*
847		 * If the MAC address has changed on the parent and it was
848		 * copied to the vap on creation then re-sync.
849		 */
850		if (vap->iv_ic == ic &&
851		    (vap->iv_flags_ext & IEEE80211_FEXT_UNIQMAC) == 0) {
852			IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp));
853			IEEE80211_UNLOCK(ic);
854			if_setlladdr(vap->iv_ifp, IF_LLADDR(ifp),
855			    IEEE80211_ADDR_LEN);
856			IEEE80211_LOCK(ic);
857		}
858	}
859	IEEE80211_UNLOCK(ic);
860}
861
862/*
863 * Module glue.
864 *
865 * NB: the module name is "wlan" for compatibility with NetBSD.
866 */
867static int
868wlan_modevent(module_t mod, int type, void *unused)
869{
870	switch (type) {
871	case MOD_LOAD:
872		if (bootverbose)
873			printf("wlan: <802.11 Link Layer>\n");
874		wlan_bpfevent = EVENTHANDLER_REGISTER(bpf_track,
875		    bpf_track, 0, EVENTHANDLER_PRI_ANY);
876		wlan_ifllevent = EVENTHANDLER_REGISTER(iflladdr_event,
877		    wlan_iflladdr, NULL, EVENTHANDLER_PRI_ANY);
878#if __FreeBSD_version >= 1000020
879		wlan_cloner = if_clone_simple(wlanname, wlan_clone_create,
880		    wlan_clone_destroy, 0);
881#else
882		if_clone_attach(&wlan_cloner);
883#endif
884		if_register_com_alloc(IFT_IEEE80211, wlan_alloc, wlan_free);
885		return 0;
886	case MOD_UNLOAD:
887		if_deregister_com_alloc(IFT_IEEE80211);
888#if __FreeBSD_version >= 1000020
889		if_clone_detach(wlan_cloner);
890#else
891		if_clone_detach(&wlan_cloner);
892#endif
893		EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent);
894		EVENTHANDLER_DEREGISTER(iflladdr_event, wlan_ifllevent);
895		return 0;
896	}
897	return EINVAL;
898}
899
900static moduledata_t wlan_mod = {
901#if __FreeBSD_version >= 1000020
902	wlanname,
903#else
904	"wlan",
905#endif
906	wlan_modevent,
907	0
908};
909DECLARE_MODULE(wlan, wlan_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
910MODULE_VERSION(wlan, 1);
911MODULE_DEPEND(wlan, ether, 1, 1, 1);
912#ifdef	IEEE80211_ALQ
913MODULE_DEPEND(wlan, alq, 1, 1, 1);
914#endif	/* IEEE80211_ALQ */
915
916