ieee80211_freebsd.c revision 283538
1138568Ssam/*-
2186904Ssam * Copyright (c) 2003-2009 Sam Leffler, Errno Consulting
3138568Ssam * All rights reserved.
4138568Ssam *
5138568Ssam * Redistribution and use in source and binary forms, with or without
6138568Ssam * modification, are permitted provided that the following conditions
7138568Ssam * are met:
8138568Ssam * 1. Redistributions of source code must retain the above copyright
9138568Ssam *    notice, this list of conditions and the following disclaimer.
10138568Ssam * 2. Redistributions in binary form must reproduce the above copyright
11138568Ssam *    notice, this list of conditions and the following disclaimer in the
12138568Ssam *    documentation and/or other materials provided with the distribution.
13138568Ssam *
14138568Ssam * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15138568Ssam * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16138568Ssam * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17138568Ssam * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18138568Ssam * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19138568Ssam * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20138568Ssam * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21138568Ssam * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22138568Ssam * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23138568Ssam * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24138568Ssam */
25138568Ssam
26138568Ssam#include <sys/cdefs.h>
27138568Ssam__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_freebsd.c 283538 2015-05-25 19:18:16Z adrian $");
28138568Ssam
29138568Ssam/*
30138568Ssam * IEEE 802.11 support (FreeBSD-specific code)
31138568Ssam */
32178354Ssam#include "opt_wlan.h"
33178354Ssam
34138568Ssam#include <sys/param.h>
35138568Ssam#include <sys/kernel.h>
36138568Ssam#include <sys/systm.h>
37138568Ssam#include <sys/linker.h>
38138568Ssam#include <sys/mbuf.h>
39138568Ssam#include <sys/module.h>
40138568Ssam#include <sys/proc.h>
41138568Ssam#include <sys/sysctl.h>
42138568Ssam
43138568Ssam#include <sys/socket.h>
44138568Ssam
45192468Ssam#include <net/bpf.h>
46138568Ssam#include <net/if.h>
47257176Sglebius#include <net/if_var.h>
48190526Ssam#include <net/if_dl.h>
49178354Ssam#include <net/if_clone.h>
50138568Ssam#include <net/if_media.h>
51178354Ssam#include <net/if_types.h>
52138568Ssam#include <net/ethernet.h>
53138568Ssam#include <net/route.h>
54196019Srwatson#include <net/vnet.h>
55138568Ssam
56138568Ssam#include <net80211/ieee80211_var.h>
57195757Ssam#include <net80211/ieee80211_input.h>
58138568Ssam
59138568SsamSYSCTL_NODE(_net, OID_AUTO, wlan, CTLFLAG_RD, 0, "IEEE 80211 parameters");
60138568Ssam
61138568Ssam#ifdef IEEE80211_DEBUG
62138568Ssamint	ieee80211_debug = 0;
63138568SsamSYSCTL_INT(_net_wlan, OID_AUTO, debug, CTLFLAG_RW, &ieee80211_debug,
64138568Ssam	    0, "debugging printfs");
65138568Ssam#endif
66138568Ssam
67227293Sedstatic MALLOC_DEFINE(M_80211_COM, "80211com", "802.11 com state");
68178354Ssam
69242154Sadrian#if __FreeBSD_version >= 1000020
70241610Sglebiusstatic const char wlanname[] = "wlan";
71241610Sglebiusstatic struct if_clone *wlan_cloner;
72242154Sadrian#endif
73241610Sglebius
74178354Ssam/*
75178354Ssam * Allocate/free com structure in conjunction with ifnet;
76178354Ssam * these routines are registered with if_register_com_alloc
77178354Ssam * below and are called automatically by the ifnet code
78178354Ssam * when the ifnet of the parent device is created.
79178354Ssam */
80178354Ssamstatic void *
81178354Ssamwlan_alloc(u_char type, struct ifnet *ifp)
82178354Ssam{
83178354Ssam	struct ieee80211com *ic;
84178354Ssam
85283538Sadrian	ic = IEEE80211_MALLOC(sizeof(struct ieee80211com), M_80211_COM,
86283538Sadrian	    IEEE80211_M_WAITOK | IEEE80211_M_ZERO);
87178354Ssam	ic->ic_ifp = ifp;
88178354Ssam
89178354Ssam	return (ic);
90178354Ssam}
91178354Ssam
92178354Ssamstatic void
93178354Ssamwlan_free(void *ic, u_char type)
94178354Ssam{
95283538Sadrian	IEEE80211_FREE(ic, M_80211_COM);
96178354Ssam}
97178354Ssam
98138568Ssamstatic int
99178354Ssamwlan_clone_create(struct if_clone *ifc, int unit, caddr_t params)
100173273Ssam{
101178354Ssam	struct ieee80211_clone_params cp;
102178354Ssam	struct ieee80211vap *vap;
103178354Ssam	struct ieee80211com *ic;
104178354Ssam	struct ifnet *ifp;
105173273Ssam	int error;
106173273Ssam
107178354Ssam	error = copyin(params, &cp, sizeof(cp));
108178354Ssam	if (error)
109178354Ssam		return error;
110178354Ssam	ifp = ifunit(cp.icp_parent);
111178354Ssam	if (ifp == NULL)
112178354Ssam		return ENXIO;
113178957Ssam	/* XXX move printfs to DIAGNOSTIC before release */
114178354Ssam	if (ifp->if_type != IFT_IEEE80211) {
115178354Ssam		if_printf(ifp, "%s: reject, not an 802.11 device\n", __func__);
116178957Ssam		return ENXIO;
117178957Ssam	}
118178957Ssam	if (cp.icp_opmode >= IEEE80211_OPMODE_MAX) {
119178957Ssam		if_printf(ifp, "%s: invalid opmode %d\n",
120178957Ssam		    __func__, cp.icp_opmode);
121178354Ssam		return EINVAL;
122178354Ssam	}
123178354Ssam	ic = ifp->if_l2com;
124178957Ssam	if ((ic->ic_caps & ieee80211_opcap[cp.icp_opmode]) == 0) {
125178957Ssam		if_printf(ifp, "%s mode not supported\n",
126178957Ssam		    ieee80211_opmode_name[cp.icp_opmode]);
127178957Ssam		return EOPNOTSUPP;
128178957Ssam	}
129186904Ssam	if ((cp.icp_flags & IEEE80211_CLONE_TDMA) &&
130186904Ssam#ifdef IEEE80211_SUPPORT_TDMA
131186904Ssam	    (ic->ic_caps & IEEE80211_C_TDMA) == 0
132186904Ssam#else
133186904Ssam	    (1)
134186904Ssam#endif
135186904Ssam	) {
136186904Ssam		if_printf(ifp, "TDMA not supported\n");
137186904Ssam		return EOPNOTSUPP;
138186904Ssam	}
139242154Sadrian#if __FreeBSD_version >= 1000020
140241610Sglebius	vap = ic->ic_vap_create(ic, wlanname, unit,
141178354Ssam			cp.icp_opmode, cp.icp_flags, cp.icp_bssid,
142178354Ssam			cp.icp_flags & IEEE80211_CLONE_MACADDR ?
143190526Ssam			    cp.icp_macaddr : (const uint8_t *)IF_LLADDR(ifp));
144242154Sadrian#else
145242154Sadrian	vap = ic->ic_vap_create(ic, ifc->ifc_name, unit,
146242154Sadrian			cp.icp_opmode, cp.icp_flags, cp.icp_bssid,
147242154Sadrian			cp.icp_flags & IEEE80211_CLONE_MACADDR ?
148242154Sadrian			    cp.icp_macaddr : (const uint8_t *)IF_LLADDR(ifp));
149242154Sadrian
150242154Sadrian#endif
151242154Sadrian
152178354Ssam	return (vap == NULL ? EIO : 0);
153178354Ssam}
154178354Ssam
155178354Ssamstatic void
156178354Ssamwlan_clone_destroy(struct ifnet *ifp)
157178354Ssam{
158178354Ssam	struct ieee80211vap *vap = ifp->if_softc;
159178354Ssam	struct ieee80211com *ic = vap->iv_ic;
160178354Ssam
161178354Ssam	ic->ic_vap_delete(vap);
162178354Ssam}
163178354Ssam
164242155Sadrian#if __FreeBSD_version < 1000020
165242154SadrianIFC_SIMPLE_DECLARE(wlan, 0);
166242155Sadrian#endif
167242154Sadrian
168178354Ssamvoid
169178354Ssamieee80211_vap_destroy(struct ieee80211vap *vap)
170178354Ssam{
171242149Sadrian	CURVNET_SET(vap->iv_ifp->if_vnet);
172242154Sadrian#if __FreeBSD_version >= 1000020
173241610Sglebius	if_clone_destroyif(wlan_cloner, vap->iv_ifp);
174242154Sadrian#else
175242154Sadrian	if_clone_destroyif(&wlan_cloner, vap->iv_ifp);
176242154Sadrian#endif
177242149Sadrian	CURVNET_RESTORE();
178178354Ssam}
179178354Ssam
180192473Ssamint
181178354Ssamieee80211_sysctl_msecs_ticks(SYSCTL_HANDLER_ARGS)
182178354Ssam{
183178354Ssam	int msecs = ticks_to_msecs(*(int *)arg1);
184178354Ssam	int error, t;
185178354Ssam
186178354Ssam	error = sysctl_handle_int(oidp, &msecs, 0, req);
187173273Ssam	if (error || !req->newptr)
188173273Ssam		return error;
189178354Ssam	t = msecs_to_ticks(msecs);
190178354Ssam	*(int *)arg1 = (t < 1) ? 1 : t;
191173273Ssam	return 0;
192173273Ssam}
193178354Ssam
194173273Ssamstatic int
195138568Ssamieee80211_sysctl_inact(SYSCTL_HANDLER_ARGS)
196138568Ssam{
197138568Ssam	int inact = (*(int *)arg1) * IEEE80211_INACT_WAIT;
198138568Ssam	int error;
199138568Ssam
200138568Ssam	error = sysctl_handle_int(oidp, &inact, 0, req);
201138568Ssam	if (error || !req->newptr)
202138568Ssam		return error;
203138568Ssam	*(int *)arg1 = inact / IEEE80211_INACT_WAIT;
204138568Ssam	return 0;
205138568Ssam}
206138568Ssam
207138568Ssamstatic int
208138568Ssamieee80211_sysctl_parent(SYSCTL_HANDLER_ARGS)
209138568Ssam{
210138568Ssam	struct ieee80211com *ic = arg1;
211138568Ssam
212283529Sglebius	return SYSCTL_OUT_STR(req, ic->ic_name);
213138568Ssam}
214138568Ssam
215181194Ssamstatic int
216181194Ssamieee80211_sysctl_radar(SYSCTL_HANDLER_ARGS)
217181194Ssam{
218181194Ssam	struct ieee80211com *ic = arg1;
219181194Ssam	int t = 0, error;
220181194Ssam
221181194Ssam	error = sysctl_handle_int(oidp, &t, 0, req);
222181194Ssam	if (error || !req->newptr)
223181194Ssam		return error;
224181194Ssam	IEEE80211_LOCK(ic);
225181194Ssam	ieee80211_dfs_notify_radar(ic, ic->ic_curchan);
226181194Ssam	IEEE80211_UNLOCK(ic);
227181194Ssam	return 0;
228181194Ssam}
229181194Ssam
230138568Ssamvoid
231138568Ssamieee80211_sysctl_attach(struct ieee80211com *ic)
232138568Ssam{
233178354Ssam}
234178354Ssam
235178354Ssamvoid
236178354Ssamieee80211_sysctl_detach(struct ieee80211com *ic)
237178354Ssam{
238178354Ssam}
239178354Ssam
240178354Ssamvoid
241178354Ssamieee80211_sysctl_vattach(struct ieee80211vap *vap)
242178354Ssam{
243178354Ssam	struct ifnet *ifp = vap->iv_ifp;
244138568Ssam	struct sysctl_ctx_list *ctx;
245138568Ssam	struct sysctl_oid *oid;
246138568Ssam	char num[14];			/* sufficient for 32 bits */
247138568Ssam
248283538Sadrian	ctx = (struct sysctl_ctx_list *) IEEE80211_MALLOC(sizeof(struct sysctl_ctx_list),
249283538Sadrian		M_DEVBUF, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
250138568Ssam	if (ctx == NULL) {
251178354Ssam		if_printf(ifp, "%s: cannot allocate sysctl context!\n",
252138568Ssam			__func__);
253138568Ssam		return;
254138568Ssam	}
255138568Ssam	sysctl_ctx_init(ctx);
256178354Ssam	snprintf(num, sizeof(num), "%u", ifp->if_dunit);
257138568Ssam	oid = SYSCTL_ADD_NODE(ctx, &SYSCTL_NODE_CHILDREN(_net, wlan),
258138568Ssam		OID_AUTO, num, CTLFLAG_RD, NULL, "");
259138568Ssam	SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
260217554Smdf		"%parent", CTLTYPE_STRING | CTLFLAG_RD, vap->iv_ic, 0,
261178354Ssam		ieee80211_sysctl_parent, "A", "parent device");
262217322Smdf	SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
263178354Ssam		"driver_caps", CTLFLAG_RW, &vap->iv_caps, 0,
264178354Ssam		"driver capabilities");
265138568Ssam#ifdef IEEE80211_DEBUG
266178354Ssam	vap->iv_debug = ieee80211_debug;
267217322Smdf	SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
268178354Ssam		"debug", CTLFLAG_RW, &vap->iv_debug, 0,
269138568Ssam		"control debugging printfs");
270138568Ssam#endif
271178354Ssam	SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
272178354Ssam		"bmiss_max", CTLFLAG_RW, &vap->iv_bmiss_max, 0,
273178354Ssam		"consecutive beacon misses before scanning");
274138568Ssam	/* XXX inherit from tunables */
275138568Ssam	SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
276178354Ssam		"inact_run", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_run, 0,
277138568Ssam		ieee80211_sysctl_inact, "I",
278138568Ssam		"station inactivity timeout (sec)");
279138568Ssam	SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
280178354Ssam		"inact_probe", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_probe, 0,
281138568Ssam		ieee80211_sysctl_inact, "I",
282138568Ssam		"station inactivity probe timeout (sec)");
283138568Ssam	SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
284178354Ssam		"inact_auth", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_auth, 0,
285138568Ssam		ieee80211_sysctl_inact, "I",
286138568Ssam		"station authentication timeout (sec)");
287138568Ssam	SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
288178354Ssam		"inact_init", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_init, 0,
289138568Ssam		ieee80211_sysctl_inact, "I",
290138568Ssam		"station initial state timeout (sec)");
291178354Ssam	if (vap->iv_htcaps & IEEE80211_HTC_HT) {
292217322Smdf		SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
293178354Ssam			"ampdu_mintraffic_bk", CTLFLAG_RW,
294178354Ssam			&vap->iv_ampdu_mintraffic[WME_AC_BK], 0,
295178354Ssam			"BK traffic tx aggr threshold (pps)");
296217322Smdf		SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
297178354Ssam			"ampdu_mintraffic_be", CTLFLAG_RW,
298178354Ssam			&vap->iv_ampdu_mintraffic[WME_AC_BE], 0,
299178354Ssam			"BE traffic tx aggr threshold (pps)");
300217322Smdf		SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
301178354Ssam			"ampdu_mintraffic_vo", CTLFLAG_RW,
302178354Ssam			&vap->iv_ampdu_mintraffic[WME_AC_VO], 0,
303178354Ssam			"VO traffic tx aggr threshold (pps)");
304217322Smdf		SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
305178354Ssam			"ampdu_mintraffic_vi", CTLFLAG_RW,
306178354Ssam			&vap->iv_ampdu_mintraffic[WME_AC_VI], 0,
307178354Ssam			"VI traffic tx aggr threshold (pps)");
308178354Ssam	}
309181194Ssam	if (vap->iv_caps & IEEE80211_C_DFS) {
310181194Ssam		SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
311181194Ssam			"radar", CTLTYPE_INT | CTLFLAG_RW, vap->iv_ic, 0,
312193115Ssam			ieee80211_sysctl_radar, "I", "simulate radar event");
313181194Ssam	}
314178354Ssam	vap->iv_sysctl = ctx;
315178354Ssam	vap->iv_oid = oid;
316138568Ssam}
317138568Ssam
318138568Ssamvoid
319178354Ssamieee80211_sysctl_vdetach(struct ieee80211vap *vap)
320138568Ssam{
321138568Ssam
322178354Ssam	if (vap->iv_sysctl != NULL) {
323178354Ssam		sysctl_ctx_free(vap->iv_sysctl);
324283538Sadrian		IEEE80211_FREE(vap->iv_sysctl, M_DEVBUF);
325178354Ssam		vap->iv_sysctl = NULL;
326138568Ssam	}
327138568Ssam}
328138568Ssam
329138568Ssamint
330138568Ssamieee80211_node_dectestref(struct ieee80211_node *ni)
331138568Ssam{
332138568Ssam	/* XXX need equivalent of atomic_dec_and_test */
333138568Ssam	atomic_subtract_int(&ni->ni_refcnt, 1);
334138568Ssam	return atomic_cmpset_int(&ni->ni_refcnt, 0, 1);
335138568Ssam}
336138568Ssam
337165894Ssamvoid
338165894Ssamieee80211_drain_ifq(struct ifqueue *ifq)
339165894Ssam{
340165894Ssam	struct ieee80211_node *ni;
341165894Ssam	struct mbuf *m;
342165894Ssam
343165894Ssam	for (;;) {
344165894Ssam		IF_DEQUEUE(ifq, m);
345165894Ssam		if (m == NULL)
346165894Ssam			break;
347165894Ssam
348165894Ssam		ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
349165894Ssam		KASSERT(ni != NULL, ("frame w/o node"));
350165894Ssam		ieee80211_free_node(ni);
351165894Ssam		m->m_pkthdr.rcvif = NULL;
352165894Ssam
353165894Ssam		m_freem(m);
354165894Ssam	}
355165894Ssam}
356165894Ssam
357178354Ssamvoid
358178354Ssamieee80211_flush_ifq(struct ifqueue *ifq, struct ieee80211vap *vap)
359178354Ssam{
360178354Ssam	struct ieee80211_node *ni;
361178354Ssam	struct mbuf *m, **mprev;
362178354Ssam
363178354Ssam	IF_LOCK(ifq);
364178354Ssam	mprev = &ifq->ifq_head;
365178354Ssam	while ((m = *mprev) != NULL) {
366178354Ssam		ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
367178354Ssam		if (ni != NULL && ni->ni_vap == vap) {
368178354Ssam			*mprev = m->m_nextpkt;		/* remove from list */
369178354Ssam			ifq->ifq_len--;
370178354Ssam
371178354Ssam			m_freem(m);
372178354Ssam			ieee80211_free_node(ni);	/* reclaim ref */
373178354Ssam		} else
374178354Ssam			mprev = &m->m_nextpkt;
375178354Ssam	}
376178354Ssam	/* recalculate tail ptr */
377178354Ssam	m = ifq->ifq_head;
378178354Ssam	for (; m != NULL && m->m_nextpkt != NULL; m = m->m_nextpkt)
379178354Ssam		;
380178354Ssam	ifq->ifq_tail = m;
381178354Ssam	IF_UNLOCK(ifq);
382178354Ssam}
383178354Ssam
384138568Ssam/*
385170530Ssam * As above, for mbufs allocated with m_gethdr/MGETHDR
386170530Ssam * or initialized by M_COPY_PKTHDR.
387170530Ssam */
388170530Ssam#define	MC_ALIGN(m, len)						\
389170530Ssamdo {									\
390170530Ssam	(m)->m_data += (MCLBYTES - (len)) &~ (sizeof(long) - 1);	\
391170530Ssam} while (/* CONSTCOND */ 0)
392170530Ssam
393170530Ssam/*
394138568Ssam * Allocate and setup a management frame of the specified
395138568Ssam * size.  We return the mbuf and a pointer to the start
396138568Ssam * of the contiguous data area that's been reserved based
397138568Ssam * on the packet length.  The data area is forced to 32-bit
398138568Ssam * alignment and the buffer length to a multiple of 4 bytes.
399138568Ssam * This is done mainly so beacon frames (that require this)
400138568Ssam * can use this interface too.
401138568Ssam */
402138568Ssamstruct mbuf *
403170530Ssamieee80211_getmgtframe(uint8_t **frm, int headroom, int pktlen)
404138568Ssam{
405138568Ssam	struct mbuf *m;
406138568Ssam	u_int len;
407138568Ssam
408138568Ssam	/*
409138568Ssam	 * NB: we know the mbuf routines will align the data area
410138568Ssam	 *     so we don't need to do anything special.
411138568Ssam	 */
412170530Ssam	len = roundup2(headroom + pktlen, 4);
413138568Ssam	KASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len));
414138568Ssam	if (len < MINCLSIZE) {
415151967Sandre		m = m_gethdr(M_NOWAIT, MT_DATA);
416138568Ssam		/*
417138568Ssam		 * Align the data in case additional headers are added.
418138568Ssam		 * This should only happen when a WEP header is added
419138568Ssam		 * which only happens for shared key authentication mgt
420138568Ssam		 * frames which all fit in MHLEN.
421138568Ssam		 */
422138568Ssam		if (m != NULL)
423276692Srwatson			M_ALIGN(m, len);
424170530Ssam	} else {
425151967Sandre		m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
426170530Ssam		if (m != NULL)
427170530Ssam			MC_ALIGN(m, len);
428170530Ssam	}
429138568Ssam	if (m != NULL) {
430171984Ssephe		m->m_data += headroom;
431138568Ssam		*frm = m->m_data;
432138568Ssam	}
433138568Ssam	return m;
434138568Ssam}
435138568Ssam
436246710Sglebius#ifndef __NO_STRICT_ALIGNMENT
437195757Ssam/*
438195757Ssam * Re-align the payload in the mbuf.  This is mainly used (right now)
439195757Ssam * to handle IP header alignment requirements on certain architectures.
440195757Ssam */
441195757Ssamstruct mbuf *
442195757Ssamieee80211_realign(struct ieee80211vap *vap, struct mbuf *m, size_t align)
443195757Ssam{
444195757Ssam	int pktlen, space;
445195757Ssam	struct mbuf *n;
446195757Ssam
447195757Ssam	pktlen = m->m_pkthdr.len;
448195757Ssam	space = pktlen + align;
449195757Ssam	if (space < MINCLSIZE)
450243882Sglebius		n = m_gethdr(M_NOWAIT, MT_DATA);
451195757Ssam	else {
452243882Sglebius		n = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR,
453195757Ssam		    space <= MCLBYTES ?     MCLBYTES :
454195757Ssam#if MJUMPAGESIZE != MCLBYTES
455195757Ssam		    space <= MJUMPAGESIZE ? MJUMPAGESIZE :
456195757Ssam#endif
457195757Ssam		    space <= MJUM9BYTES ?   MJUM9BYTES : MJUM16BYTES);
458195757Ssam	}
459195757Ssam	if (__predict_true(n != NULL)) {
460195757Ssam		m_move_pkthdr(n, m);
461195757Ssam		n->m_data = (caddr_t)(ALIGN(n->m_data + align) - align);
462195757Ssam		m_copydata(m, 0, pktlen, mtod(n, caddr_t));
463195757Ssam		n->m_len = pktlen;
464195757Ssam	} else {
465195757Ssam		IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
466195757Ssam		    mtod(m, const struct ieee80211_frame *), NULL,
467195757Ssam		    "%s", "no mbuf to realign");
468195757Ssam		vap->iv_stats.is_rx_badalign++;
469195757Ssam	}
470195757Ssam	m_freem(m);
471195757Ssam	return n;
472195757Ssam}
473246710Sglebius#endif /* !__NO_STRICT_ALIGNMENT */
474195757Ssam
475170530Ssamint
476170530Ssamieee80211_add_callback(struct mbuf *m,
477170530Ssam	void (*func)(struct ieee80211_node *, void *, int), void *arg)
478170530Ssam{
479170530Ssam	struct m_tag *mtag;
480170530Ssam	struct ieee80211_cb *cb;
481170530Ssam
482170530Ssam	mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_CALLBACK,
483170530Ssam			sizeof(struct ieee80211_cb), M_NOWAIT);
484170530Ssam	if (mtag == NULL)
485170530Ssam		return 0;
486170530Ssam
487170530Ssam	cb = (struct ieee80211_cb *)(mtag+1);
488170530Ssam	cb->func = func;
489170530Ssam	cb->arg = arg;
490170530Ssam	m_tag_prepend(m, mtag);
491170530Ssam	m->m_flags |= M_TXCB;
492170530Ssam	return 1;
493170530Ssam}
494170530Ssam
495170530Ssamvoid
496170530Ssamieee80211_process_callback(struct ieee80211_node *ni,
497170530Ssam	struct mbuf *m, int status)
498170530Ssam{
499170530Ssam	struct m_tag *mtag;
500170530Ssam
501170530Ssam	mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, NULL);
502170530Ssam	if (mtag != NULL) {
503170530Ssam		struct ieee80211_cb *cb = (struct ieee80211_cb *)(mtag+1);
504170530Ssam		cb->func(ni, cb->arg, status);
505170530Ssam	}
506170530Ssam}
507170530Ssam
508248069Sadrian/*
509248069Sadrian * Transmit a frame to the parent interface.
510248069Sadrian *
511248069Sadrian * TODO: if the transmission fails, make sure the parent node is freed
512248069Sadrian *   (the callers will first need modifying.)
513248069Sadrian */
514248069Sadrianint
515254082Sadrianieee80211_parent_xmitpkt(struct ieee80211com *ic,
516248069Sadrian	struct mbuf *m)
517248069Sadrian{
518248069Sadrian	struct ifnet *parent = ic->ic_ifp;
519248069Sadrian	/*
520248069Sadrian	 * Assert the IC TX lock is held - this enforces the
521248069Sadrian	 * processing -> queuing order is maintained
522248069Sadrian	 */
523248069Sadrian	IEEE80211_TX_LOCK_ASSERT(ic);
524248069Sadrian
525248069Sadrian	return (parent->if_transmit(parent, m));
526248069Sadrian}
527248069Sadrian
528248069Sadrian/*
529248069Sadrian * Transmit a frame to the VAP interface.
530248069Sadrian */
531248069Sadrianint
532254082Sadrianieee80211_vap_xmitpkt(struct ieee80211vap *vap, struct mbuf *m)
533248069Sadrian{
534248069Sadrian	struct ifnet *ifp = vap->iv_ifp;
535248069Sadrian
536248069Sadrian	/*
537248069Sadrian	 * When transmitting via the VAP, we shouldn't hold
538248069Sadrian	 * any IC TX lock as the VAP TX path will acquire it.
539248069Sadrian	 */
540248069Sadrian	IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
541248069Sadrian
542248069Sadrian	return (ifp->if_transmit(ifp, m));
543248069Sadrian
544248069Sadrian}
545248069Sadrian
546138568Ssam#include <sys/libkern.h>
547138568Ssam
548138568Ssamvoid
549138568Ssamget_random_bytes(void *p, size_t n)
550138568Ssam{
551170530Ssam	uint8_t *dp = p;
552138568Ssam
553138568Ssam	while (n > 0) {
554170530Ssam		uint32_t v = arc4random();
555170530Ssam		size_t nb = n > sizeof(uint32_t) ? sizeof(uint32_t) : n;
556170530Ssam		bcopy(&v, dp, n > sizeof(uint32_t) ? sizeof(uint32_t) : n);
557170530Ssam		dp += sizeof(uint32_t), n -= nb;
558138568Ssam	}
559138568Ssam}
560138568Ssam
561178354Ssam/*
562178354Ssam * Helper function for events that pass just a single mac address.
563178354Ssam */
564178354Ssamstatic void
565178354Ssamnotify_macaddr(struct ifnet *ifp, int op, const uint8_t mac[IEEE80211_ADDR_LEN])
566138568Ssam{
567138568Ssam	struct ieee80211_join_event iev;
568138568Ssam
569191816Szec	CURVNET_SET(ifp->if_vnet);
570144302Ssam	memset(&iev, 0, sizeof(iev));
571178354Ssam	IEEE80211_ADDR_COPY(iev.iev_addr, mac);
572178354Ssam	rt_ieee80211msg(ifp, op, &iev, sizeof(iev));
573191816Szec	CURVNET_RESTORE();
574178354Ssam}
575178354Ssam
576178354Ssamvoid
577178354Ssamieee80211_notify_node_join(struct ieee80211_node *ni, int newassoc)
578178354Ssam{
579178354Ssam	struct ieee80211vap *vap = ni->ni_vap;
580178354Ssam	struct ifnet *ifp = vap->iv_ifp;
581178354Ssam
582191816Szec	CURVNET_SET_QUIET(ifp->if_vnet);
583178354Ssam	IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode join",
584178354Ssam	    (ni == vap->iv_bss) ? "bss " : "");
585178354Ssam
586178354Ssam	if (ni == vap->iv_bss) {
587178354Ssam		notify_macaddr(ifp, newassoc ?
588178354Ssam		    RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC, ni->ni_bssid);
589138568Ssam		if_link_state_change(ifp, LINK_STATE_UP);
590144302Ssam	} else {
591178354Ssam		notify_macaddr(ifp, newassoc ?
592178354Ssam		    RTM_IEEE80211_JOIN : RTM_IEEE80211_REJOIN, ni->ni_macaddr);
593138568Ssam	}
594191816Szec	CURVNET_RESTORE();
595138568Ssam}
596138568Ssam
597138568Ssamvoid
598178354Ssamieee80211_notify_node_leave(struct ieee80211_node *ni)
599138568Ssam{
600178354Ssam	struct ieee80211vap *vap = ni->ni_vap;
601178354Ssam	struct ifnet *ifp = vap->iv_ifp;
602138568Ssam
603191816Szec	CURVNET_SET_QUIET(ifp->if_vnet);
604178354Ssam	IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode leave",
605178354Ssam	    (ni == vap->iv_bss) ? "bss " : "");
606178354Ssam
607178354Ssam	if (ni == vap->iv_bss) {
608138568Ssam		rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0);
609138568Ssam		if_link_state_change(ifp, LINK_STATE_DOWN);
610138568Ssam	} else {
611138568Ssam		/* fire off wireless event station leaving */
612178354Ssam		notify_macaddr(ifp, RTM_IEEE80211_LEAVE, ni->ni_macaddr);
613138568Ssam	}
614191816Szec	CURVNET_RESTORE();
615138568Ssam}
616138568Ssam
617138568Ssamvoid
618178354Ssamieee80211_notify_scan_done(struct ieee80211vap *vap)
619138568Ssam{
620178354Ssam	struct ifnet *ifp = vap->iv_ifp;
621138568Ssam
622178354Ssam	IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s\n", "notify scan done");
623138568Ssam
624138568Ssam	/* dispatch wireless event indicating scan completed */
625191816Szec	CURVNET_SET(ifp->if_vnet);
626138568Ssam	rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0);
627191816Szec	CURVNET_RESTORE();
628138568Ssam}
629138568Ssam
630138568Ssamvoid
631178354Ssamieee80211_notify_replay_failure(struct ieee80211vap *vap,
632138568Ssam	const struct ieee80211_frame *wh, const struct ieee80211_key *k,
633193541Ssam	u_int64_t rsc, int tid)
634138568Ssam{
635178354Ssam	struct ifnet *ifp = vap->iv_ifp;
636138568Ssam
637178354Ssam	IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2,
638226885Sadrian	    "%s replay detected tid %d <rsc %ju, csc %ju, keyix %u rxkeyix %u>",
639233531Sadrian	    k->wk_cipher->ic_name, tid, (intmax_t) rsc,
640193541Ssam	    (intmax_t) k->wk_keyrsc[tid],
641148863Ssam	    k->wk_keyix, k->wk_rxkeyix);
642138568Ssam
643138568Ssam	if (ifp != NULL) {		/* NB: for cipher test modules */
644138568Ssam		struct ieee80211_replay_event iev;
645138568Ssam
646138568Ssam		IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1);
647138568Ssam		IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2);
648138568Ssam		iev.iev_cipher = k->wk_cipher->ic_cipher;
649148863Ssam		if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE)
650148863Ssam			iev.iev_keyix = k->wk_rxkeyix;
651148863Ssam		else
652148863Ssam			iev.iev_keyix = k->wk_keyix;
653193541Ssam		iev.iev_keyrsc = k->wk_keyrsc[tid];
654138568Ssam		iev.iev_rsc = rsc;
655191816Szec		CURVNET_SET(ifp->if_vnet);
656138568Ssam		rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev));
657191816Szec		CURVNET_RESTORE();
658138568Ssam	}
659138568Ssam}
660138568Ssam
661138568Ssamvoid
662178354Ssamieee80211_notify_michael_failure(struct ieee80211vap *vap,
663138568Ssam	const struct ieee80211_frame *wh, u_int keyix)
664138568Ssam{
665178354Ssam	struct ifnet *ifp = vap->iv_ifp;
666138568Ssam
667178354Ssam	IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2,
668178354Ssam	    "michael MIC verification failed <keyix %u>", keyix);
669178354Ssam	vap->iv_stats.is_rx_tkipmic++;
670138568Ssam
671138568Ssam	if (ifp != NULL) {		/* NB: for cipher test modules */
672138568Ssam		struct ieee80211_michael_event iev;
673138568Ssam
674138568Ssam		IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1);
675138568Ssam		IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2);
676138568Ssam		iev.iev_cipher = IEEE80211_CIPHER_TKIP;
677138568Ssam		iev.iev_keyix = keyix;
678191816Szec		CURVNET_SET(ifp->if_vnet);
679138568Ssam		rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev));
680191816Szec		CURVNET_RESTORE();
681138568Ssam	}
682138568Ssam}
683138568Ssam
684138568Ssamvoid
685178354Ssamieee80211_notify_wds_discover(struct ieee80211_node *ni)
686178354Ssam{
687178354Ssam	struct ieee80211vap *vap = ni->ni_vap;
688178354Ssam	struct ifnet *ifp = vap->iv_ifp;
689178354Ssam
690178354Ssam	notify_macaddr(ifp, RTM_IEEE80211_WDS, ni->ni_macaddr);
691178354Ssam}
692178354Ssam
693178354Ssamvoid
694178354Ssamieee80211_notify_csa(struct ieee80211com *ic,
695178354Ssam	const struct ieee80211_channel *c, int mode, int count)
696178354Ssam{
697178354Ssam	struct ifnet *ifp = ic->ic_ifp;
698178354Ssam	struct ieee80211_csa_event iev;
699178354Ssam
700178354Ssam	memset(&iev, 0, sizeof(iev));
701178354Ssam	iev.iev_flags = c->ic_flags;
702178354Ssam	iev.iev_freq = c->ic_freq;
703178354Ssam	iev.iev_ieee = c->ic_ieee;
704178354Ssam	iev.iev_mode = mode;
705178354Ssam	iev.iev_count = count;
706248539Sadrian	CURVNET_SET(ifp->if_vnet);
707178354Ssam	rt_ieee80211msg(ifp, RTM_IEEE80211_CSA, &iev, sizeof(iev));
708248539Sadrian	CURVNET_RESTORE();
709178354Ssam}
710178354Ssam
711178354Ssamvoid
712178354Ssamieee80211_notify_radar(struct ieee80211com *ic,
713178354Ssam	const struct ieee80211_channel *c)
714178354Ssam{
715178354Ssam	struct ifnet *ifp = ic->ic_ifp;
716178354Ssam	struct ieee80211_radar_event iev;
717178354Ssam
718178354Ssam	memset(&iev, 0, sizeof(iev));
719178354Ssam	iev.iev_flags = c->ic_flags;
720178354Ssam	iev.iev_freq = c->ic_freq;
721178354Ssam	iev.iev_ieee = c->ic_ieee;
722248539Sadrian	CURVNET_SET(ifp->if_vnet);
723178354Ssam	rt_ieee80211msg(ifp, RTM_IEEE80211_RADAR, &iev, sizeof(iev));
724248539Sadrian	CURVNET_RESTORE();
725178354Ssam}
726178354Ssam
727178354Ssamvoid
728178354Ssamieee80211_notify_cac(struct ieee80211com *ic,
729178354Ssam	const struct ieee80211_channel *c, enum ieee80211_notify_cac_event type)
730178354Ssam{
731178354Ssam	struct ifnet *ifp = ic->ic_ifp;
732178354Ssam	struct ieee80211_cac_event iev;
733178354Ssam
734178354Ssam	memset(&iev, 0, sizeof(iev));
735178354Ssam	iev.iev_flags = c->ic_flags;
736178354Ssam	iev.iev_freq = c->ic_freq;
737178354Ssam	iev.iev_ieee = c->ic_ieee;
738178354Ssam	iev.iev_type = type;
739248539Sadrian	CURVNET_SET(ifp->if_vnet);
740178354Ssam	rt_ieee80211msg(ifp, RTM_IEEE80211_CAC, &iev, sizeof(iev));
741248539Sadrian	CURVNET_RESTORE();
742178354Ssam}
743178354Ssam
744178354Ssamvoid
745178354Ssamieee80211_notify_node_deauth(struct ieee80211_node *ni)
746178354Ssam{
747178354Ssam	struct ieee80211vap *vap = ni->ni_vap;
748178354Ssam	struct ifnet *ifp = vap->iv_ifp;
749178354Ssam
750178354Ssam	IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node deauth");
751178354Ssam
752178354Ssam	notify_macaddr(ifp, RTM_IEEE80211_DEAUTH, ni->ni_macaddr);
753178354Ssam}
754178354Ssam
755178354Ssamvoid
756178354Ssamieee80211_notify_node_auth(struct ieee80211_node *ni)
757178354Ssam{
758178354Ssam	struct ieee80211vap *vap = ni->ni_vap;
759178354Ssam	struct ifnet *ifp = vap->iv_ifp;
760178354Ssam
761178354Ssam	IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node auth");
762178354Ssam
763178354Ssam	notify_macaddr(ifp, RTM_IEEE80211_AUTH, ni->ni_macaddr);
764178354Ssam}
765178354Ssam
766178354Ssamvoid
767178354Ssamieee80211_notify_country(struct ieee80211vap *vap,
768178354Ssam	const uint8_t bssid[IEEE80211_ADDR_LEN], const uint8_t cc[2])
769178354Ssam{
770178354Ssam	struct ifnet *ifp = vap->iv_ifp;
771178354Ssam	struct ieee80211_country_event iev;
772178354Ssam
773178354Ssam	memset(&iev, 0, sizeof(iev));
774178354Ssam	IEEE80211_ADDR_COPY(iev.iev_addr, bssid);
775178354Ssam	iev.iev_cc[0] = cc[0];
776178354Ssam	iev.iev_cc[1] = cc[1];
777248539Sadrian	CURVNET_SET(ifp->if_vnet);
778178354Ssam	rt_ieee80211msg(ifp, RTM_IEEE80211_COUNTRY, &iev, sizeof(iev));
779248539Sadrian	CURVNET_RESTORE();
780178354Ssam}
781178354Ssam
782178354Ssamvoid
783178354Ssamieee80211_notify_radio(struct ieee80211com *ic, int state)
784178354Ssam{
785178354Ssam	struct ifnet *ifp = ic->ic_ifp;
786178354Ssam	struct ieee80211_radio_event iev;
787178354Ssam
788178354Ssam	memset(&iev, 0, sizeof(iev));
789178354Ssam	iev.iev_state = state;
790248539Sadrian	CURVNET_SET(ifp->if_vnet);
791178354Ssam	rt_ieee80211msg(ifp, RTM_IEEE80211_RADIO, &iev, sizeof(iev));
792248539Sadrian	CURVNET_RESTORE();
793178354Ssam}
794178354Ssam
795178354Ssamvoid
796138568Ssamieee80211_load_module(const char *modname)
797138568Ssam{
798159590Sjhb
799138777Ssam#ifdef notyet
800159590Sjhb	(void)kern_kldload(curthread, modname, NULL);
801138777Ssam#else
802138777Ssam	printf("%s: load the %s module by hand for now.\n", __func__, modname);
803138777Ssam#endif
804138568Ssam}
805138568Ssam
806192468Ssamstatic eventhandler_tag wlan_bpfevent;
807202612Sthompsastatic eventhandler_tag wlan_ifllevent;
808192468Ssam
809192468Ssamstatic void
810192764Ssambpf_track(void *arg, struct ifnet *ifp, int dlt, int attach)
811192468Ssam{
812256294Sadrian	/* NB: identify vap's by if_init */
813254082Sadrian	if (dlt == DLT_IEEE802_11_RADIO &&
814256294Sadrian	    ifp->if_init == ieee80211_init) {
815192468Ssam		struct ieee80211vap *vap = ifp->if_softc;
816192468Ssam		/*
817192468Ssam		 * Track bpf radiotap listener state.  We mark the vap
818192468Ssam		 * to indicate if any listener is present and the com
819192468Ssam		 * to indicate if any listener exists on any associated
820192468Ssam		 * vap.  This flag is used by drivers to prepare radiotap
821192468Ssam		 * state only when needed.
822192468Ssam		 */
823193292Ssam		if (attach) {
824192468Ssam			ieee80211_syncflag_ext(vap, IEEE80211_FEXT_BPF);
825193292Ssam			if (vap->iv_opmode == IEEE80211_M_MONITOR)
826193292Ssam				atomic_add_int(&vap->iv_ic->ic_montaps, 1);
827193312Ssam		} else if (!bpf_peers_present(vap->iv_rawbpf)) {
828192468Ssam			ieee80211_syncflag_ext(vap, -IEEE80211_FEXT_BPF);
829193292Ssam			if (vap->iv_opmode == IEEE80211_M_MONITOR)
830193292Ssam				atomic_subtract_int(&vap->iv_ic->ic_montaps, 1);
831193292Ssam		}
832192468Ssam	}
833192468Ssam}
834192468Ssam
835202612Sthompsastatic void
836202612Sthompsawlan_iflladdr(void *arg __unused, struct ifnet *ifp)
837202612Sthompsa{
838202612Sthompsa	struct ieee80211com *ic = ifp->if_l2com;
839202612Sthompsa	struct ieee80211vap *vap, *next;
840202612Sthompsa
841202612Sthompsa	if (ifp->if_type != IFT_IEEE80211 || ic == NULL)
842202612Sthompsa		return;
843202612Sthompsa
844202612Sthompsa	IEEE80211_LOCK(ic);
845202612Sthompsa	TAILQ_FOREACH_SAFE(vap, &ic->ic_vaps, iv_next, next) {
846202612Sthompsa		/*
847202612Sthompsa		 * If the MAC address has changed on the parent and it was
848202612Sthompsa		 * copied to the vap on creation then re-sync.
849202612Sthompsa		 */
850202612Sthompsa		if (vap->iv_ic == ic &&
851202612Sthompsa		    (vap->iv_flags_ext & IEEE80211_FEXT_UNIQMAC) == 0) {
852202612Sthompsa			IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp));
853202612Sthompsa			IEEE80211_UNLOCK(ic);
854202612Sthompsa			if_setlladdr(vap->iv_ifp, IF_LLADDR(ifp),
855202612Sthompsa			    IEEE80211_ADDR_LEN);
856202612Sthompsa			IEEE80211_LOCK(ic);
857202612Sthompsa		}
858202612Sthompsa	}
859202612Sthompsa	IEEE80211_UNLOCK(ic);
860202612Sthompsa}
861202612Sthompsa
862138568Ssam/*
863138568Ssam * Module glue.
864138568Ssam *
865138568Ssam * NB: the module name is "wlan" for compatibility with NetBSD.
866138568Ssam */
867138568Ssamstatic int
868138568Ssamwlan_modevent(module_t mod, int type, void *unused)
869138568Ssam{
870138568Ssam	switch (type) {
871138568Ssam	case MOD_LOAD:
872138568Ssam		if (bootverbose)
873138568Ssam			printf("wlan: <802.11 Link Layer>\n");
874192468Ssam		wlan_bpfevent = EVENTHANDLER_REGISTER(bpf_track,
875192468Ssam		    bpf_track, 0, EVENTHANDLER_PRI_ANY);
876202612Sthompsa		wlan_ifllevent = EVENTHANDLER_REGISTER(iflladdr_event,
877202612Sthompsa		    wlan_iflladdr, NULL, EVENTHANDLER_PRI_ANY);
878242154Sadrian#if __FreeBSD_version >= 1000020
879241610Sglebius		wlan_cloner = if_clone_simple(wlanname, wlan_clone_create,
880241610Sglebius		    wlan_clone_destroy, 0);
881242154Sadrian#else
882242154Sadrian		if_clone_attach(&wlan_cloner);
883242154Sadrian#endif
884178354Ssam		if_register_com_alloc(IFT_IEEE80211, wlan_alloc, wlan_free);
885138568Ssam		return 0;
886138568Ssam	case MOD_UNLOAD:
887178354Ssam		if_deregister_com_alloc(IFT_IEEE80211);
888242154Sadrian#if __FreeBSD_version >= 1000020
889241610Sglebius		if_clone_detach(wlan_cloner);
890242154Sadrian#else
891242154Sadrian		if_clone_detach(&wlan_cloner);
892242154Sadrian#endif
893192468Ssam		EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent);
894202612Sthompsa		EVENTHANDLER_DEREGISTER(iflladdr_event, wlan_ifllevent);
895138568Ssam		return 0;
896138568Ssam	}
897138568Ssam	return EINVAL;
898138568Ssam}
899138568Ssam
900138568Ssamstatic moduledata_t wlan_mod = {
901242154Sadrian#if __FreeBSD_version >= 1000020
902241610Sglebius	wlanname,
903242154Sadrian#else
904242154Sadrian	"wlan",
905242154Sadrian#endif
906138568Ssam	wlan_modevent,
907241394Skevlo	0
908138568Ssam};
909138568SsamDECLARE_MODULE(wlan, wlan_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
910138568SsamMODULE_VERSION(wlan, 1);
911138568SsamMODULE_DEPEND(wlan, ether, 1, 1, 1);
912233050Sadrian#ifdef	IEEE80211_ALQ
913233050SadrianMODULE_DEPEND(wlan, alq, 1, 1, 1);
914233050Sadrian#endif	/* IEEE80211_ALQ */
915233050Sadrian
916