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("$FreeBSD$");
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_dl.h>
48 #include <net/if_clone.h>
49 #include <net/if_media.h>
50 #include <net/if_types.h>
51 #include <net/ethernet.h>
52 #include <net/route.h>
53 #include <net/vnet.h>
54
55 #include <net80211/ieee80211_var.h>
56 #include <net80211/ieee80211_input.h>
57
58 SYSCTL_NODE(_net, OID_AUTO, wlan, CTLFLAG_RD, 0, "IEEE 80211 parameters");
59
60 #ifdef IEEE80211_DEBUG
61 int ieee80211_debug = 0;
62 SYSCTL_INT(_net_wlan, OID_AUTO, debug, CTLFLAG_RW, &ieee80211_debug,
63 0, "debugging printfs");
64 #endif
65
66 static MALLOC_DEFINE(M_80211_COM, "80211com", "802.11 com state");
67
68 #if __FreeBSD_version >= 1000020
69 static const char wlanname[] = "wlan";
70 static struct if_clone *wlan_cloner;
71 #endif
72
73 /*
74 * Allocate/free com structure in conjunction with ifnet;
75 * these routines are registered with if_register_com_alloc
76 * below and are called automatically by the ifnet code
77 * when the ifnet of the parent device is created.
78 */
79 static void *
80 wlan_alloc(u_char type, struct ifnet *ifp)
81 {
82 struct ieee80211com *ic;
83
84 ic = malloc(sizeof(struct ieee80211com), M_80211_COM, M_WAITOK|M_ZERO);
85 ic->ic_ifp = ifp;
86
87 return (ic);
88 }
89
90 static void
91 wlan_free(void *ic, u_char type)
92 {
93 free(ic, M_80211_COM);
94 }
95
96 static int
97 wlan_clone_create(struct if_clone *ifc, int unit, caddr_t params)
98 {
99 struct ieee80211_clone_params cp;
100 struct ieee80211vap *vap;
101 struct ieee80211com *ic;
102 struct ifnet *ifp;
103 int error;
104
105 error = copyin(params, &cp, sizeof(cp));
106 if (error)
107 return error;
108 ifp = ifunit(cp.icp_parent);
109 if (ifp == NULL)
110 return ENXIO;
111 /* XXX move printfs to DIAGNOSTIC before release */
112 if (ifp->if_type != IFT_IEEE80211) {
113 if_printf(ifp, "%s: reject, not an 802.11 device\n", __func__);
114 return ENXIO;
115 }
116 if (cp.icp_opmode >= IEEE80211_OPMODE_MAX) {
117 if_printf(ifp, "%s: invalid opmode %d\n",
118 __func__, cp.icp_opmode);
119 return EINVAL;
120 }
121 ic = ifp->if_l2com;
122 if ((ic->ic_caps & ieee80211_opcap[cp.icp_opmode]) == 0) {
123 if_printf(ifp, "%s mode not supported\n",
124 ieee80211_opmode_name[cp.icp_opmode]);
125 return EOPNOTSUPP;
126 }
127 if ((cp.icp_flags & IEEE80211_CLONE_TDMA) &&
128 #ifdef IEEE80211_SUPPORT_TDMA
129 (ic->ic_caps & IEEE80211_C_TDMA) == 0
130 #else
131 (1)
132 #endif
133 ) {
134 if_printf(ifp, "TDMA not supported\n");
135 return EOPNOTSUPP;
136 }
137 #if __FreeBSD_version >= 1000020
138 vap = ic->ic_vap_create(ic, wlanname, unit,
139 cp.icp_opmode, cp.icp_flags, cp.icp_bssid,
140 cp.icp_flags & IEEE80211_CLONE_MACADDR ?
141 cp.icp_macaddr : (const uint8_t *)IF_LLADDR(ifp));
142 #else
143 vap = ic->ic_vap_create(ic, ifc->ifc_name, unit,
144 cp.icp_opmode, cp.icp_flags, cp.icp_bssid,
145 cp.icp_flags & IEEE80211_CLONE_MACADDR ?
146 cp.icp_macaddr : (const uint8_t *)IF_LLADDR(ifp));
147
148 #endif
149
150 return (vap == NULL ? EIO : 0);
151 }
152
153 static void
154 wlan_clone_destroy(struct ifnet *ifp)
155 {
156 struct ieee80211vap *vap = ifp->if_softc;
157 struct ieee80211com *ic = vap->iv_ic;
158
159 ic->ic_vap_delete(vap);
160 }
161
162 #if __FreeBSD_version < 1000020
163 IFC_SIMPLE_DECLARE(wlan, 0);
164 #endif
165
166 void
167 ieee80211_vap_destroy(struct ieee80211vap *vap)
168 {
169 CURVNET_SET(vap->iv_ifp->if_vnet);
170 #if __FreeBSD_version >= 1000020
171 if_clone_destroyif(wlan_cloner, vap->iv_ifp);
172 #else
173 if_clone_destroyif(&wlan_cloner, vap->iv_ifp);
174 #endif
175 CURVNET_RESTORE();
176 }
177
178 int
179 ieee80211_sysctl_msecs_ticks(SYSCTL_HANDLER_ARGS)
180 {
181 int msecs = ticks_to_msecs(*(int *)arg1);
182 int error, t;
183
184 error = sysctl_handle_int(oidp, &msecs, 0, req);
185 if (error || !req->newptr)
186 return error;
187 t = msecs_to_ticks(msecs);
188 *(int *)arg1 = (t < 1) ? 1 : t;
189 return 0;
190 }
191
192 static int
193 ieee80211_sysctl_inact(SYSCTL_HANDLER_ARGS)
194 {
195 int inact = (*(int *)arg1) * IEEE80211_INACT_WAIT;
196 int error;
197
198 error = sysctl_handle_int(oidp, &inact, 0, req);
199 if (error || !req->newptr)
200 return error;
201 *(int *)arg1 = inact / IEEE80211_INACT_WAIT;
202 return 0;
203 }
204
205 static int
206 ieee80211_sysctl_parent(SYSCTL_HANDLER_ARGS)
207 {
208 struct ieee80211com *ic = arg1;
209 const char *name = ic->ic_ifp->if_xname;
210
211 return SYSCTL_OUT(req, name, strlen(name));
212 }
213
214 static int
215 ieee80211_sysctl_radar(SYSCTL_HANDLER_ARGS)
216 {
217 struct ieee80211com *ic = arg1;
218 int t = 0, error;
219
220 error = sysctl_handle_int(oidp, &t, 0, req);
221 if (error || !req->newptr)
222 return error;
223 IEEE80211_LOCK(ic);
224 ieee80211_dfs_notify_radar(ic, ic->ic_curchan);
225 IEEE80211_UNLOCK(ic);
226 return 0;
227 }
228
229 void
230 ieee80211_sysctl_attach(struct ieee80211com *ic)
231 {
232 }
233
234 void
235 ieee80211_sysctl_detach(struct ieee80211com *ic)
236 {
237 }
238
239 void
240 ieee80211_sysctl_vattach(struct ieee80211vap *vap)
241 {
242 struct ifnet *ifp = vap->iv_ifp;
243 struct sysctl_ctx_list *ctx;
244 struct sysctl_oid *oid;
245 char num[14]; /* sufficient for 32 bits */
246
247 ctx = (struct sysctl_ctx_list *) malloc(sizeof(struct sysctl_ctx_list),
248 M_DEVBUF, M_NOWAIT | M_ZERO);
249 if (ctx == NULL) {
250 if_printf(ifp, "%s: cannot allocate sysctl context!\n",
251 __func__);
252 return;
253 }
254 sysctl_ctx_init(ctx);
255 snprintf(num, sizeof(num), "%u", ifp->if_dunit);
256 oid = SYSCTL_ADD_NODE(ctx, &SYSCTL_NODE_CHILDREN(_net, wlan),
257 OID_AUTO, num, CTLFLAG_RD, NULL, "");
258 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
259 "%parent", CTLTYPE_STRING | CTLFLAG_RD, vap->iv_ic, 0,
260 ieee80211_sysctl_parent, "A", "parent device");
261 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
262 "driver_caps", CTLFLAG_RW, &vap->iv_caps, 0,
263 "driver capabilities");
264 #ifdef IEEE80211_DEBUG
265 vap->iv_debug = ieee80211_debug;
266 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
267 "debug", CTLFLAG_RW, &vap->iv_debug, 0,
268 "control debugging printfs");
269 #endif
270 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
271 "bmiss_max", CTLFLAG_RW, &vap->iv_bmiss_max, 0,
272 "consecutive beacon misses before scanning");
273 /* XXX inherit from tunables */
274 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
275 "inact_run", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_run, 0,
276 ieee80211_sysctl_inact, "I",
277 "station inactivity timeout (sec)");
278 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
279 "inact_probe", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_probe, 0,
280 ieee80211_sysctl_inact, "I",
281 "station inactivity probe timeout (sec)");
282 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
283 "inact_auth", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_auth, 0,
284 ieee80211_sysctl_inact, "I",
285 "station authentication timeout (sec)");
286 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
287 "inact_init", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_init, 0,
288 ieee80211_sysctl_inact, "I",
289 "station initial state timeout (sec)");
290 if (vap->iv_htcaps & IEEE80211_HTC_HT) {
291 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
292 "ampdu_mintraffic_bk", CTLFLAG_RW,
293 &vap->iv_ampdu_mintraffic[WME_AC_BK], 0,
294 "BK traffic tx aggr threshold (pps)");
295 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
296 "ampdu_mintraffic_be", CTLFLAG_RW,
297 &vap->iv_ampdu_mintraffic[WME_AC_BE], 0,
298 "BE traffic tx aggr threshold (pps)");
299 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
300 "ampdu_mintraffic_vo", CTLFLAG_RW,
301 &vap->iv_ampdu_mintraffic[WME_AC_VO], 0,
302 "VO traffic tx aggr threshold (pps)");
303 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
304 "ampdu_mintraffic_vi", CTLFLAG_RW,
305 &vap->iv_ampdu_mintraffic[WME_AC_VI], 0,
306 "VI traffic tx aggr threshold (pps)");
307 }
308 if (vap->iv_caps & IEEE80211_C_DFS) {
309 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
310 "radar", CTLTYPE_INT | CTLFLAG_RW, vap->iv_ic, 0,
311 ieee80211_sysctl_radar, "I", "simulate radar event");
312 }
313 vap->iv_sysctl = ctx;
314 vap->iv_oid = oid;
315 }
316
317 void
318 ieee80211_sysctl_vdetach(struct ieee80211vap *vap)
319 {
320
321 if (vap->iv_sysctl != NULL) {
322 sysctl_ctx_free(vap->iv_sysctl);
323 free(vap->iv_sysctl, M_DEVBUF);
324 vap->iv_sysctl = NULL;
325 }
326 }
327
328 int
329 ieee80211_node_dectestref(struct ieee80211_node *ni)
330 {
331 /* XXX need equivalent of atomic_dec_and_test */
332 atomic_subtract_int(&ni->ni_refcnt, 1);
333 return atomic_cmpset_int(&ni->ni_refcnt, 0, 1);
334 }
335
336 void
337 ieee80211_drain_ifq(struct ifqueue *ifq)
338 {
339 struct ieee80211_node *ni;
340 struct mbuf *m;
341
342 for (;;) {
343 IF_DEQUEUE(ifq, m);
344 if (m == NULL)
345 break;
346
347 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
348 KASSERT(ni != NULL, ("frame w/o node"));
349 ieee80211_free_node(ni);
350 m->m_pkthdr.rcvif = NULL;
351
352 m_freem(m);
353 }
354 }
355
356 void
357 ieee80211_flush_ifq(struct ifqueue *ifq, struct ieee80211vap *vap)
358 {
359 struct ieee80211_node *ni;
360 struct mbuf *m, **mprev;
361
362 IF_LOCK(ifq);
363 mprev = &ifq->ifq_head;
364 while ((m = *mprev) != NULL) {
365 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
366 if (ni != NULL && ni->ni_vap == vap) {
367 *mprev = m->m_nextpkt; /* remove from list */
368 ifq->ifq_len--;
369
370 m_freem(m);
371 ieee80211_free_node(ni); /* reclaim ref */
372 } else
373 mprev = &m->m_nextpkt;
374 }
375 /* recalculate tail ptr */
376 m = ifq->ifq_head;
377 for (; m != NULL && m->m_nextpkt != NULL; m = m->m_nextpkt)
378 ;
379 ifq->ifq_tail = m;
380 IF_UNLOCK(ifq);
381 }
382
383 /*
384 * As above, for mbufs allocated with m_gethdr/MGETHDR
385 * or initialized by M_COPY_PKTHDR.
386 */
387 #define MC_ALIGN(m, len) \
388 do { \
389 (m)->m_data += (MCLBYTES - (len)) &~ (sizeof(long) - 1); \
390 } while (/* CONSTCOND */ 0)
391
392 /*
393 * Allocate and setup a management frame of the specified
394 * size. We return the mbuf and a pointer to the start
395 * of the contiguous data area that's been reserved based
396 * on the packet length. The data area is forced to 32-bit
397 * alignment and the buffer length to a multiple of 4 bytes.
398 * This is done mainly so beacon frames (that require this)
399 * can use this interface too.
400 */
401 struct mbuf *
402 ieee80211_getmgtframe(uint8_t **frm, int headroom, int pktlen)
403 {
404 struct mbuf *m;
405 u_int len;
406
407 /*
408 * NB: we know the mbuf routines will align the data area
409 * so we don't need to do anything special.
410 */
411 len = roundup2(headroom + pktlen, 4);
412 KASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len));
413 if (len < MINCLSIZE) {
414 m = m_gethdr(M_NOWAIT, MT_DATA);
415 /*
416 * Align the data in case additional headers are added.
417 * This should only happen when a WEP header is added
418 * which only happens for shared key authentication mgt
419 * frames which all fit in MHLEN.
420 */
421 if (m != NULL)
422 MH_ALIGN(m, len);
423 } else {
424 m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
425 if (m != NULL)
426 MC_ALIGN(m, len);
427 }
428 if (m != NULL) {
429 m->m_data += headroom;
430 *frm = m->m_data;
431 }
432 return m;
433 }
434
435 #ifndef __NO_STRICT_ALIGNMENT
436 /*
437 * Re-align the payload in the mbuf. This is mainly used (right now)
438 * to handle IP header alignment requirements on certain architectures.
439 */
440 struct mbuf *
441 ieee80211_realign(struct ieee80211vap *vap, struct mbuf *m, size_t align)
442 {
443 int pktlen, space;
444 struct mbuf *n;
445
446 pktlen = m->m_pkthdr.len;
447 space = pktlen + align;
448 if (space < MINCLSIZE)
449 n = m_gethdr(M_NOWAIT, MT_DATA);
450 else {
451 n = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR,
452 space <= MCLBYTES ? MCLBYTES :
453 #if MJUMPAGESIZE != MCLBYTES
454 space <= MJUMPAGESIZE ? MJUMPAGESIZE :
455 #endif
456 space <= MJUM9BYTES ? MJUM9BYTES : MJUM16BYTES);
457 }
458 if (__predict_true(n != NULL)) {
459 m_move_pkthdr(n, m);
460 n->m_data = (caddr_t)(ALIGN(n->m_data + align) - align);
461 m_copydata(m, 0, pktlen, mtod(n, caddr_t));
462 n->m_len = pktlen;
463 } else {
464 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
465 mtod(m, const struct ieee80211_frame *), NULL,
466 "%s", "no mbuf to realign");
467 vap->iv_stats.is_rx_badalign++;
468 }
469 m_freem(m);
470 return n;
471 }
472 #endif /* !__NO_STRICT_ALIGNMENT */
473
474 int
475 ieee80211_add_callback(struct mbuf *m,
476 void (*func)(struct ieee80211_node *, void *, int), void *arg)
477 {
478 struct m_tag *mtag;
479 struct ieee80211_cb *cb;
480
481 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_CALLBACK,
482 sizeof(struct ieee80211_cb), M_NOWAIT);
483 if (mtag == NULL)
484 return 0;
485
486 cb = (struct ieee80211_cb *)(mtag+1);
487 cb->func = func;
488 cb->arg = arg;
489 m_tag_prepend(m, mtag);
490 m->m_flags |= M_TXCB;
491 return 1;
492 }
493
494 void
495 ieee80211_process_callback(struct ieee80211_node *ni,
496 struct mbuf *m, int status)
497 {
498 struct m_tag *mtag;
499
500 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, NULL);
501 if (mtag != NULL) {
502 struct ieee80211_cb *cb = (struct ieee80211_cb *)(mtag+1);
503 cb->func(ni, cb->arg, status);
504 }
505 }
506
507 /*
508 * Transmit a frame to the parent interface.
509 *
510 * TODO: if the transmission fails, make sure the parent node is freed
511 * (the callers will first need modifying.)
512 */
513 int
514 ieee80211_parent_xmitpkt(struct ieee80211com *ic,
515 struct mbuf *m)
516 {
517 struct ifnet *parent = ic->ic_ifp;
518 /*
519 * Assert the IC TX lock is held - this enforces the
520 * processing -> queuing order is maintained
521 */
522 IEEE80211_TX_LOCK_ASSERT(ic);
523
524 return (parent->if_transmit(parent, m));
525 }
526
527 /*
528 * Transmit a frame to the VAP interface.
529 */
530 int
531 ieee80211_vap_xmitpkt(struct ieee80211vap *vap, struct mbuf *m)
532 {
533 struct ifnet *ifp = vap->iv_ifp;
534
535 /*
536 * When transmitting via the VAP, we shouldn't hold
537 * any IC TX lock as the VAP TX path will acquire it.
538 */
539 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
540
541 return (ifp->if_transmit(ifp, m));
542
543 }
544
545 #include <sys/libkern.h>
546
547 void
548 get_random_bytes(void *p, size_t n)
549 {
550 uint8_t *dp = p;
551
552 while (n > 0) {
553 uint32_t v = arc4random();
554 size_t nb = n > sizeof(uint32_t) ? sizeof(uint32_t) : n;
555 bcopy(&v, dp, n > sizeof(uint32_t) ? sizeof(uint32_t) : n);
556 dp += sizeof(uint32_t), n -= nb;
557 }
558 }
559
560 /*
561 * Helper function for events that pass just a single mac address.
562 */
563 static void
564 notify_macaddr(struct ifnet *ifp, int op, const uint8_t mac[IEEE80211_ADDR_LEN])
565 {
566 struct ieee80211_join_event iev;
567
568 CURVNET_SET(ifp->if_vnet);
569 memset(&iev, 0, sizeof(iev));
570 IEEE80211_ADDR_COPY(iev.iev_addr, mac);
571 rt_ieee80211msg(ifp, op, &iev, sizeof(iev));
572 CURVNET_RESTORE();
573 }
574
575 void
576 ieee80211_notify_node_join(struct ieee80211_node *ni, int newassoc)
577 {
578 struct ieee80211vap *vap = ni->ni_vap;
579 struct ifnet *ifp = vap->iv_ifp;
580
581 CURVNET_SET_QUIET(ifp->if_vnet);
582 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode join",
583 (ni == vap->iv_bss) ? "bss " : "");
584
585 if (ni == vap->iv_bss) {
586 notify_macaddr(ifp, newassoc ?
587 RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC, ni->ni_bssid);
588 if_link_state_change(ifp, LINK_STATE_UP);
589 } else {
590 notify_macaddr(ifp, newassoc ?
591 RTM_IEEE80211_JOIN : RTM_IEEE80211_REJOIN, ni->ni_macaddr);
592 }
593 CURVNET_RESTORE();
594 }
595
596 void
597 ieee80211_notify_node_leave(struct ieee80211_node *ni)
598 {
599 struct ieee80211vap *vap = ni->ni_vap;
600 struct ifnet *ifp = vap->iv_ifp;
601
602 CURVNET_SET_QUIET(ifp->if_vnet);
603 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode leave",
604 (ni == vap->iv_bss) ? "bss " : "");
605
606 if (ni == vap->iv_bss) {
607 rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0);
608 if_link_state_change(ifp, LINK_STATE_DOWN);
609 } else {
610 /* fire off wireless event station leaving */
611 notify_macaddr(ifp, RTM_IEEE80211_LEAVE, ni->ni_macaddr);
612 }
613 CURVNET_RESTORE();
614 }
615
616 void
617 ieee80211_notify_scan_done(struct ieee80211vap *vap)
618 {
619 struct ifnet *ifp = vap->iv_ifp;
620
621 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s\n", "notify scan done");
622
623 /* dispatch wireless event indicating scan completed */
624 CURVNET_SET(ifp->if_vnet);
625 rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0);
626 CURVNET_RESTORE();
627 }
628
629 void
630 ieee80211_notify_replay_failure(struct ieee80211vap *vap,
631 const struct ieee80211_frame *wh, const struct ieee80211_key *k,
632 u_int64_t rsc, int tid)
633 {
634 struct ifnet *ifp = vap->iv_ifp;
635
636 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2,
637 "%s replay detected tid %d <rsc %ju, csc %ju, keyix %u rxkeyix %u>",
638 k->wk_cipher->ic_name, tid, (intmax_t) rsc,
639 (intmax_t) k->wk_keyrsc[tid],
640 k->wk_keyix, k->wk_rxkeyix);
641
642 if (ifp != NULL) { /* NB: for cipher test modules */
643 struct ieee80211_replay_event iev;
644
645 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1);
646 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2);
647 iev.iev_cipher = k->wk_cipher->ic_cipher;
648 if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE)
649 iev.iev_keyix = k->wk_rxkeyix;
650 else
651 iev.iev_keyix = k->wk_keyix;
652 iev.iev_keyrsc = k->wk_keyrsc[tid];
653 iev.iev_rsc = rsc;
654 CURVNET_SET(ifp->if_vnet);
655 rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev));
656 CURVNET_RESTORE();
657 }
658 }
659
660 void
661 ieee80211_notify_michael_failure(struct ieee80211vap *vap,
662 const struct ieee80211_frame *wh, u_int keyix)
663 {
664 struct ifnet *ifp = vap->iv_ifp;
665
666 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2,
667 "michael MIC verification failed <keyix %u>", keyix);
668 vap->iv_stats.is_rx_tkipmic++;
669
670 if (ifp != NULL) { /* NB: for cipher test modules */
671 struct ieee80211_michael_event iev;
672
673 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1);
674 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2);
675 iev.iev_cipher = IEEE80211_CIPHER_TKIP;
676 iev.iev_keyix = keyix;
677 CURVNET_SET(ifp->if_vnet);
678 rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev));
679 CURVNET_RESTORE();
680 }
681 }
682
683 void
684 ieee80211_notify_wds_discover(struct ieee80211_node *ni)
685 {
686 struct ieee80211vap *vap = ni->ni_vap;
687 struct ifnet *ifp = vap->iv_ifp;
688
689 notify_macaddr(ifp, RTM_IEEE80211_WDS, ni->ni_macaddr);
690 }
691
692 void
693 ieee80211_notify_csa(struct ieee80211com *ic,
694 const struct ieee80211_channel *c, int mode, int count)
695 {
696 struct ifnet *ifp = ic->ic_ifp;
697 struct ieee80211_csa_event iev;
698
699 memset(&iev, 0, sizeof(iev));
700 iev.iev_flags = c->ic_flags;
701 iev.iev_freq = c->ic_freq;
702 iev.iev_ieee = c->ic_ieee;
703 iev.iev_mode = mode;
704 iev.iev_count = count;
705 CURVNET_SET(ifp->if_vnet);
706 rt_ieee80211msg(ifp, RTM_IEEE80211_CSA, &iev, sizeof(iev));
707 CURVNET_RESTORE();
708 }
709
710 void
711 ieee80211_notify_radar(struct ieee80211com *ic,
712 const struct ieee80211_channel *c)
713 {
714 struct ifnet *ifp = ic->ic_ifp;
715 struct ieee80211_radar_event iev;
716
717 memset(&iev, 0, sizeof(iev));
718 iev.iev_flags = c->ic_flags;
719 iev.iev_freq = c->ic_freq;
720 iev.iev_ieee = c->ic_ieee;
721 CURVNET_SET(ifp->if_vnet);
722 rt_ieee80211msg(ifp, RTM_IEEE80211_RADAR, &iev, sizeof(iev));
723 CURVNET_RESTORE();
724 }
725
726 void
727 ieee80211_notify_cac(struct ieee80211com *ic,
728 const struct ieee80211_channel *c, enum ieee80211_notify_cac_event type)
729 {
730 struct ifnet *ifp = ic->ic_ifp;
731 struct ieee80211_cac_event iev;
732
733 memset(&iev, 0, sizeof(iev));
734 iev.iev_flags = c->ic_flags;
735 iev.iev_freq = c->ic_freq;
736 iev.iev_ieee = c->ic_ieee;
737 iev.iev_type = type;
738 CURVNET_SET(ifp->if_vnet);
739 rt_ieee80211msg(ifp, RTM_IEEE80211_CAC, &iev, sizeof(iev));
740 CURVNET_RESTORE();
741 }
742
743 void
744 ieee80211_notify_node_deauth(struct ieee80211_node *ni)
745 {
746 struct ieee80211vap *vap = ni->ni_vap;
747 struct ifnet *ifp = vap->iv_ifp;
748
749 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node deauth");
750
751 notify_macaddr(ifp, RTM_IEEE80211_DEAUTH, ni->ni_macaddr);
752 }
753
754 void
755 ieee80211_notify_node_auth(struct ieee80211_node *ni)
756 {
757 struct ieee80211vap *vap = ni->ni_vap;
758 struct ifnet *ifp = vap->iv_ifp;
759
760 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node auth");
761
762 notify_macaddr(ifp, RTM_IEEE80211_AUTH, ni->ni_macaddr);
763 }
764
765 void
766 ieee80211_notify_country(struct ieee80211vap *vap,
767 const uint8_t bssid[IEEE80211_ADDR_LEN], const uint8_t cc[2])
768 {
769 struct ifnet *ifp = vap->iv_ifp;
770 struct ieee80211_country_event iev;
771
772 memset(&iev, 0, sizeof(iev));
773 IEEE80211_ADDR_COPY(iev.iev_addr, bssid);
774 iev.iev_cc[0] = cc[0];
775 iev.iev_cc[1] = cc[1];
776 CURVNET_SET(ifp->if_vnet);
777 rt_ieee80211msg(ifp, RTM_IEEE80211_COUNTRY, &iev, sizeof(iev));
778 CURVNET_RESTORE();
779 }
780
781 void
782 ieee80211_notify_radio(struct ieee80211com *ic, int state)
783 {
784 struct ifnet *ifp = ic->ic_ifp;
785 struct ieee80211_radio_event iev;
786
787 memset(&iev, 0, sizeof(iev));
788 iev.iev_state = state;
789 CURVNET_SET(ifp->if_vnet);
790 rt_ieee80211msg(ifp, RTM_IEEE80211_RADIO, &iev, sizeof(iev));
791 CURVNET_RESTORE();
792 }
793
794 void
795 ieee80211_load_module(const char *modname)
796 {
797
798 #ifdef notyet
799 (void)kern_kldload(curthread, modname, NULL);
800 #else
801 printf("%s: load the %s module by hand for now.\n", __func__, modname);
802 #endif
803 }
804
805 static eventhandler_tag wlan_bpfevent;
806 static eventhandler_tag wlan_ifllevent;
807
808 static void
809 bpf_track(void *arg, struct ifnet *ifp, int dlt, int attach)
810 {
811 /* NB: identify vap's by if_init */
812 if (dlt == DLT_IEEE802_11_RADIO &&
813 ifp->if_init == ieee80211_init) {
814 struct ieee80211vap *vap = ifp->if_softc;
815 /*
816 * Track bpf radiotap listener state. We mark the vap
817 * to indicate if any listener is present and the com
818 * to indicate if any listener exists on any associated
819 * vap. This flag is used by drivers to prepare radiotap
820 * state only when needed.
821 */
822 if (attach) {
823 ieee80211_syncflag_ext(vap, IEEE80211_FEXT_BPF);
824 if (vap->iv_opmode == IEEE80211_M_MONITOR)
825 atomic_add_int(&vap->iv_ic->ic_montaps, 1);
826 } else if (!bpf_peers_present(vap->iv_rawbpf)) {
827 ieee80211_syncflag_ext(vap, -IEEE80211_FEXT_BPF);
828 if (vap->iv_opmode == IEEE80211_M_MONITOR)
829 atomic_subtract_int(&vap->iv_ic->ic_montaps, 1);
830 }
831 }
832 }
833
834 static void
835 wlan_iflladdr(void *arg __unused, struct ifnet *ifp)
836 {
837 struct ieee80211com *ic = ifp->if_l2com;
838 struct ieee80211vap *vap, *next;
839
840 if (ifp->if_type != IFT_IEEE80211 || ic == NULL)
841 return;
842
843 IEEE80211_LOCK(ic);
844 TAILQ_FOREACH_SAFE(vap, &ic->ic_vaps, iv_next, next) {
845 /*
846 * If the MAC address has changed on the parent and it was
847 * copied to the vap on creation then re-sync.
848 */
849 if (vap->iv_ic == ic &&
850 (vap->iv_flags_ext & IEEE80211_FEXT_UNIQMAC) == 0) {
851 IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp));
852 IEEE80211_UNLOCK(ic);
853 if_setlladdr(vap->iv_ifp, IF_LLADDR(ifp),
854 IEEE80211_ADDR_LEN);
855 IEEE80211_LOCK(ic);
856 }
857 }
858 IEEE80211_UNLOCK(ic);
859 }
860
861 /*
862 * Module glue.
863 *
864 * NB: the module name is "wlan" for compatibility with NetBSD.
865 */
866 static int
867 wlan_modevent(module_t mod, int type, void *unused)
868 {
869 switch (type) {
870 case MOD_LOAD:
871 if (bootverbose)
872 printf("wlan: <802.11 Link Layer>\n");
873 wlan_bpfevent = EVENTHANDLER_REGISTER(bpf_track,
874 bpf_track, 0, EVENTHANDLER_PRI_ANY);
875 if (wlan_bpfevent == NULL)
876 return ENOMEM;
877 wlan_ifllevent = EVENTHANDLER_REGISTER(iflladdr_event,
878 wlan_iflladdr, NULL, EVENTHANDLER_PRI_ANY);
879 if (wlan_ifllevent == NULL) {
880 EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent);
881 return ENOMEM;
882 }
883 #if __FreeBSD_version >= 1000020
884 wlan_cloner = if_clone_simple(wlanname, wlan_clone_create,
885 wlan_clone_destroy, 0);
886 #else
887 if_clone_attach(&wlan_cloner);
888 #endif
889 if_register_com_alloc(IFT_IEEE80211, wlan_alloc, wlan_free);
890 return 0;
891 case MOD_UNLOAD:
892 if_deregister_com_alloc(IFT_IEEE80211);
893 #if __FreeBSD_version >= 1000020
894 if_clone_detach(wlan_cloner);
895 #else
896 if_clone_detach(&wlan_cloner);
897 #endif
898 EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent);
899 EVENTHANDLER_DEREGISTER(iflladdr_event, wlan_ifllevent);
900 return 0;
901 }
902 return EINVAL;
903 }
904
905 static moduledata_t wlan_mod = {
906 #if __FreeBSD_version >= 1000020
907 wlanname,
908 #else
909 "wlan",
910 #endif
911 wlan_modevent,
912 0
913 };
914 DECLARE_MODULE(wlan, wlan_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
915 MODULE_VERSION(wlan, 1);
916 MODULE_DEPEND(wlan, ether, 1, 1, 1);
917 #ifdef IEEE80211_ALQ
918 MODULE_DEPEND(wlan, alq, 1, 1, 1);
919 #endif /* IEEE80211_ALQ */
920
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