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: releng/11.0/sys/net80211/ieee80211_freebsd.c 300232 2016-05-19 21:08:33Z avos $");
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/systm.h>
36 #include <sys/eventhandler.h>
37 #include <sys/kernel.h>
38 #include <sys/linker.h>
39 #include <sys/malloc.h>
40 #include <sys/mbuf.h>
41 #include <sys/module.h>
42 #include <sys/proc.h>
43 #include <sys/sysctl.h>
44
45 #include <sys/socket.h>
46
47 #include <net/bpf.h>
48 #include <net/if.h>
49 #include <net/if_var.h>
50 #include <net/if_dl.h>
51 #include <net/if_clone.h>
52 #include <net/if_media.h>
53 #include <net/if_types.h>
54 #include <net/ethernet.h>
55 #include <net/route.h>
56 #include <net/vnet.h>
57
58 #include <net80211/ieee80211_var.h>
59 #include <net80211/ieee80211_input.h>
60
61 SYSCTL_NODE(_net, OID_AUTO, wlan, CTLFLAG_RD, 0, "IEEE 80211 parameters");
62
63 #ifdef IEEE80211_DEBUG
64 static int ieee80211_debug = 0;
65 SYSCTL_INT(_net_wlan, OID_AUTO, debug, CTLFLAG_RW, &ieee80211_debug,
66 0, "debugging printfs");
67 #endif
68
69 static MALLOC_DEFINE(M_80211_COM, "80211com", "802.11 com state");
70
71 static const char wlanname[] = "wlan";
72 static struct if_clone *wlan_cloner;
73
74 static int
75 wlan_clone_create(struct if_clone *ifc, int unit, caddr_t params)
76 {
77 struct ieee80211_clone_params cp;
78 struct ieee80211vap *vap;
79 struct ieee80211com *ic;
80 int error;
81
82 error = copyin(params, &cp, sizeof(cp));
83 if (error)
84 return error;
85 ic = ieee80211_find_com(cp.icp_parent);
86 if (ic == NULL)
87 return ENXIO;
88 if (cp.icp_opmode >= IEEE80211_OPMODE_MAX) {
89 ic_printf(ic, "%s: invalid opmode %d\n", __func__,
90 cp.icp_opmode);
91 return EINVAL;
92 }
93 if ((ic->ic_caps & ieee80211_opcap[cp.icp_opmode]) == 0) {
94 ic_printf(ic, "%s mode not supported\n",
95 ieee80211_opmode_name[cp.icp_opmode]);
96 return EOPNOTSUPP;
97 }
98 if ((cp.icp_flags & IEEE80211_CLONE_TDMA) &&
99 #ifdef IEEE80211_SUPPORT_TDMA
100 (ic->ic_caps & IEEE80211_C_TDMA) == 0
101 #else
102 (1)
103 #endif
104 ) {
105 ic_printf(ic, "TDMA not supported\n");
106 return EOPNOTSUPP;
107 }
108 vap = ic->ic_vap_create(ic, wlanname, unit,
109 cp.icp_opmode, cp.icp_flags, cp.icp_bssid,
110 cp.icp_flags & IEEE80211_CLONE_MACADDR ?
111 cp.icp_macaddr : ic->ic_macaddr);
112
113 return (vap == NULL ? EIO : 0);
114 }
115
116 static void
117 wlan_clone_destroy(struct ifnet *ifp)
118 {
119 struct ieee80211vap *vap = ifp->if_softc;
120 struct ieee80211com *ic = vap->iv_ic;
121
122 ic->ic_vap_delete(vap);
123 }
124
125 void
126 ieee80211_vap_destroy(struct ieee80211vap *vap)
127 {
128 CURVNET_SET(vap->iv_ifp->if_vnet);
129 if_clone_destroyif(wlan_cloner, vap->iv_ifp);
130 CURVNET_RESTORE();
131 }
132
133 int
134 ieee80211_sysctl_msecs_ticks(SYSCTL_HANDLER_ARGS)
135 {
136 int msecs = ticks_to_msecs(*(int *)arg1);
137 int error, t;
138
139 error = sysctl_handle_int(oidp, &msecs, 0, req);
140 if (error || !req->newptr)
141 return error;
142 t = msecs_to_ticks(msecs);
143 *(int *)arg1 = (t < 1) ? 1 : t;
144 return 0;
145 }
146
147 static int
148 ieee80211_sysctl_inact(SYSCTL_HANDLER_ARGS)
149 {
150 int inact = (*(int *)arg1) * IEEE80211_INACT_WAIT;
151 int error;
152
153 error = sysctl_handle_int(oidp, &inact, 0, req);
154 if (error || !req->newptr)
155 return error;
156 *(int *)arg1 = inact / IEEE80211_INACT_WAIT;
157 return 0;
158 }
159
160 static int
161 ieee80211_sysctl_parent(SYSCTL_HANDLER_ARGS)
162 {
163 struct ieee80211com *ic = arg1;
164
165 return SYSCTL_OUT_STR(req, ic->ic_name);
166 }
167
168 static int
169 ieee80211_sysctl_radar(SYSCTL_HANDLER_ARGS)
170 {
171 struct ieee80211com *ic = arg1;
172 int t = 0, error;
173
174 error = sysctl_handle_int(oidp, &t, 0, req);
175 if (error || !req->newptr)
176 return error;
177 IEEE80211_LOCK(ic);
178 ieee80211_dfs_notify_radar(ic, ic->ic_curchan);
179 IEEE80211_UNLOCK(ic);
180 return 0;
181 }
182
183 void
184 ieee80211_sysctl_attach(struct ieee80211com *ic)
185 {
186 }
187
188 void
189 ieee80211_sysctl_detach(struct ieee80211com *ic)
190 {
191 }
192
193 void
194 ieee80211_sysctl_vattach(struct ieee80211vap *vap)
195 {
196 struct ifnet *ifp = vap->iv_ifp;
197 struct sysctl_ctx_list *ctx;
198 struct sysctl_oid *oid;
199 char num[14]; /* sufficient for 32 bits */
200
201 ctx = (struct sysctl_ctx_list *) IEEE80211_MALLOC(sizeof(struct sysctl_ctx_list),
202 M_DEVBUF, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
203 if (ctx == NULL) {
204 if_printf(ifp, "%s: cannot allocate sysctl context!\n",
205 __func__);
206 return;
207 }
208 sysctl_ctx_init(ctx);
209 snprintf(num, sizeof(num), "%u", ifp->if_dunit);
210 oid = SYSCTL_ADD_NODE(ctx, &SYSCTL_NODE_CHILDREN(_net, wlan),
211 OID_AUTO, num, CTLFLAG_RD, NULL, "");
212 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
213 "%parent", CTLTYPE_STRING | CTLFLAG_RD, vap->iv_ic, 0,
214 ieee80211_sysctl_parent, "A", "parent device");
215 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
216 "driver_caps", CTLFLAG_RW, &vap->iv_caps, 0,
217 "driver capabilities");
218 #ifdef IEEE80211_DEBUG
219 vap->iv_debug = ieee80211_debug;
220 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
221 "debug", CTLFLAG_RW, &vap->iv_debug, 0,
222 "control debugging printfs");
223 #endif
224 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
225 "bmiss_max", CTLFLAG_RW, &vap->iv_bmiss_max, 0,
226 "consecutive beacon misses before scanning");
227 /* XXX inherit from tunables */
228 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
229 "inact_run", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_run, 0,
230 ieee80211_sysctl_inact, "I",
231 "station inactivity timeout (sec)");
232 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
233 "inact_probe", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_probe, 0,
234 ieee80211_sysctl_inact, "I",
235 "station inactivity probe timeout (sec)");
236 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
237 "inact_auth", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_auth, 0,
238 ieee80211_sysctl_inact, "I",
239 "station authentication timeout (sec)");
240 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
241 "inact_init", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_init, 0,
242 ieee80211_sysctl_inact, "I",
243 "station initial state timeout (sec)");
244 if (vap->iv_htcaps & IEEE80211_HTC_HT) {
245 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
246 "ampdu_mintraffic_bk", CTLFLAG_RW,
247 &vap->iv_ampdu_mintraffic[WME_AC_BK], 0,
248 "BK traffic tx aggr threshold (pps)");
249 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
250 "ampdu_mintraffic_be", CTLFLAG_RW,
251 &vap->iv_ampdu_mintraffic[WME_AC_BE], 0,
252 "BE traffic tx aggr threshold (pps)");
253 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
254 "ampdu_mintraffic_vo", CTLFLAG_RW,
255 &vap->iv_ampdu_mintraffic[WME_AC_VO], 0,
256 "VO traffic tx aggr threshold (pps)");
257 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
258 "ampdu_mintraffic_vi", CTLFLAG_RW,
259 &vap->iv_ampdu_mintraffic[WME_AC_VI], 0,
260 "VI traffic tx aggr threshold (pps)");
261 }
262 if (vap->iv_caps & IEEE80211_C_DFS) {
263 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
264 "radar", CTLTYPE_INT | CTLFLAG_RW, vap->iv_ic, 0,
265 ieee80211_sysctl_radar, "I", "simulate radar event");
266 }
267 vap->iv_sysctl = ctx;
268 vap->iv_oid = oid;
269 }
270
271 void
272 ieee80211_sysctl_vdetach(struct ieee80211vap *vap)
273 {
274
275 if (vap->iv_sysctl != NULL) {
276 sysctl_ctx_free(vap->iv_sysctl);
277 IEEE80211_FREE(vap->iv_sysctl, M_DEVBUF);
278 vap->iv_sysctl = NULL;
279 }
280 }
281
282 int
283 ieee80211_node_dectestref(struct ieee80211_node *ni)
284 {
285 /* XXX need equivalent of atomic_dec_and_test */
286 atomic_subtract_int(&ni->ni_refcnt, 1);
287 return atomic_cmpset_int(&ni->ni_refcnt, 0, 1);
288 }
289
290 void
291 ieee80211_drain_ifq(struct ifqueue *ifq)
292 {
293 struct ieee80211_node *ni;
294 struct mbuf *m;
295
296 for (;;) {
297 IF_DEQUEUE(ifq, m);
298 if (m == NULL)
299 break;
300
301 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
302 KASSERT(ni != NULL, ("frame w/o node"));
303 ieee80211_free_node(ni);
304 m->m_pkthdr.rcvif = NULL;
305
306 m_freem(m);
307 }
308 }
309
310 void
311 ieee80211_flush_ifq(struct ifqueue *ifq, struct ieee80211vap *vap)
312 {
313 struct ieee80211_node *ni;
314 struct mbuf *m, **mprev;
315
316 IF_LOCK(ifq);
317 mprev = &ifq->ifq_head;
318 while ((m = *mprev) != NULL) {
319 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
320 if (ni != NULL && ni->ni_vap == vap) {
321 *mprev = m->m_nextpkt; /* remove from list */
322 ifq->ifq_len--;
323
324 m_freem(m);
325 ieee80211_free_node(ni); /* reclaim ref */
326 } else
327 mprev = &m->m_nextpkt;
328 }
329 /* recalculate tail ptr */
330 m = ifq->ifq_head;
331 for (; m != NULL && m->m_nextpkt != NULL; m = m->m_nextpkt)
332 ;
333 ifq->ifq_tail = m;
334 IF_UNLOCK(ifq);
335 }
336
337 /*
338 * As above, for mbufs allocated with m_gethdr/MGETHDR
339 * or initialized by M_COPY_PKTHDR.
340 */
341 #define MC_ALIGN(m, len) \
342 do { \
343 (m)->m_data += rounddown2(MCLBYTES - (len), sizeof(long)); \
344 } while (/* CONSTCOND */ 0)
345
346 /*
347 * Allocate and setup a management frame of the specified
348 * size. We return the mbuf and a pointer to the start
349 * of the contiguous data area that's been reserved based
350 * on the packet length. The data area is forced to 32-bit
351 * alignment and the buffer length to a multiple of 4 bytes.
352 * This is done mainly so beacon frames (that require this)
353 * can use this interface too.
354 */
355 struct mbuf *
356 ieee80211_getmgtframe(uint8_t **frm, int headroom, int pktlen)
357 {
358 struct mbuf *m;
359 u_int len;
360
361 /*
362 * NB: we know the mbuf routines will align the data area
363 * so we don't need to do anything special.
364 */
365 len = roundup2(headroom + pktlen, 4);
366 KASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len));
367 if (len < MINCLSIZE) {
368 m = m_gethdr(M_NOWAIT, MT_DATA);
369 /*
370 * Align the data in case additional headers are added.
371 * This should only happen when a WEP header is added
372 * which only happens for shared key authentication mgt
373 * frames which all fit in MHLEN.
374 */
375 if (m != NULL)
376 M_ALIGN(m, len);
377 } else {
378 m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
379 if (m != NULL)
380 MC_ALIGN(m, len);
381 }
382 if (m != NULL) {
383 m->m_data += headroom;
384 *frm = m->m_data;
385 }
386 return m;
387 }
388
389 #ifndef __NO_STRICT_ALIGNMENT
390 /*
391 * Re-align the payload in the mbuf. This is mainly used (right now)
392 * to handle IP header alignment requirements on certain architectures.
393 */
394 struct mbuf *
395 ieee80211_realign(struct ieee80211vap *vap, struct mbuf *m, size_t align)
396 {
397 int pktlen, space;
398 struct mbuf *n;
399
400 pktlen = m->m_pkthdr.len;
401 space = pktlen + align;
402 if (space < MINCLSIZE)
403 n = m_gethdr(M_NOWAIT, MT_DATA);
404 else {
405 n = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR,
406 space <= MCLBYTES ? MCLBYTES :
407 #if MJUMPAGESIZE != MCLBYTES
408 space <= MJUMPAGESIZE ? MJUMPAGESIZE :
409 #endif
410 space <= MJUM9BYTES ? MJUM9BYTES : MJUM16BYTES);
411 }
412 if (__predict_true(n != NULL)) {
413 m_move_pkthdr(n, m);
414 n->m_data = (caddr_t)(ALIGN(n->m_data + align) - align);
415 m_copydata(m, 0, pktlen, mtod(n, caddr_t));
416 n->m_len = pktlen;
417 } else {
418 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
419 mtod(m, const struct ieee80211_frame *), NULL,
420 "%s", "no mbuf to realign");
421 vap->iv_stats.is_rx_badalign++;
422 }
423 m_freem(m);
424 return n;
425 }
426 #endif /* !__NO_STRICT_ALIGNMENT */
427
428 int
429 ieee80211_add_callback(struct mbuf *m,
430 void (*func)(struct ieee80211_node *, void *, int), void *arg)
431 {
432 struct m_tag *mtag;
433 struct ieee80211_cb *cb;
434
435 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_CALLBACK,
436 sizeof(struct ieee80211_cb), M_NOWAIT);
437 if (mtag == NULL)
438 return 0;
439
440 cb = (struct ieee80211_cb *)(mtag+1);
441 cb->func = func;
442 cb->arg = arg;
443 m_tag_prepend(m, mtag);
444 m->m_flags |= M_TXCB;
445 return 1;
446 }
447
448 int
449 ieee80211_add_xmit_params(struct mbuf *m,
450 const struct ieee80211_bpf_params *params)
451 {
452 struct m_tag *mtag;
453 struct ieee80211_tx_params *tx;
454
455 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_XMIT_PARAMS,
456 sizeof(struct ieee80211_tx_params), M_NOWAIT);
457 if (mtag == NULL)
458 return (0);
459
460 tx = (struct ieee80211_tx_params *)(mtag+1);
461 memcpy(&tx->params, params, sizeof(struct ieee80211_bpf_params));
462 m_tag_prepend(m, mtag);
463 return (1);
464 }
465
466 int
467 ieee80211_get_xmit_params(struct mbuf *m,
468 struct ieee80211_bpf_params *params)
469 {
470 struct m_tag *mtag;
471 struct ieee80211_tx_params *tx;
472
473 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_XMIT_PARAMS,
474 NULL);
475 if (mtag == NULL)
476 return (-1);
477 tx = (struct ieee80211_tx_params *)(mtag + 1);
478 memcpy(params, &tx->params, sizeof(struct ieee80211_bpf_params));
479 return (0);
480 }
481
482 void
483 ieee80211_process_callback(struct ieee80211_node *ni,
484 struct mbuf *m, int status)
485 {
486 struct m_tag *mtag;
487
488 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, NULL);
489 if (mtag != NULL) {
490 struct ieee80211_cb *cb = (struct ieee80211_cb *)(mtag+1);
491 cb->func(ni, cb->arg, status);
492 }
493 }
494
495 /*
496 * Add RX parameters to the given mbuf.
497 *
498 * Returns 1 if OK, 0 on error.
499 */
500 int
501 ieee80211_add_rx_params(struct mbuf *m, const struct ieee80211_rx_stats *rxs)
502 {
503 struct m_tag *mtag;
504 struct ieee80211_rx_params *rx;
505
506 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_RECV_PARAMS,
507 sizeof(struct ieee80211_rx_stats), M_NOWAIT);
508 if (mtag == NULL)
509 return (0);
510
511 rx = (struct ieee80211_rx_params *)(mtag + 1);
512 memcpy(&rx->params, rxs, sizeof(*rxs));
513 m_tag_prepend(m, mtag);
514 return (1);
515 }
516
517 int
518 ieee80211_get_rx_params(struct mbuf *m, struct ieee80211_rx_stats *rxs)
519 {
520 struct m_tag *mtag;
521 struct ieee80211_rx_params *rx;
522
523 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_RECV_PARAMS,
524 NULL);
525 if (mtag == NULL)
526 return (-1);
527 rx = (struct ieee80211_rx_params *)(mtag + 1);
528 memcpy(rxs, &rx->params, sizeof(*rxs));
529 return (0);
530 }
531
532 /*
533 * Transmit a frame to the parent interface.
534 */
535 int
536 ieee80211_parent_xmitpkt(struct ieee80211com *ic, struct mbuf *m)
537 {
538 int error;
539
540 /*
541 * Assert the IC TX lock is held - this enforces the
542 * processing -> queuing order is maintained
543 */
544 IEEE80211_TX_LOCK_ASSERT(ic);
545 error = ic->ic_transmit(ic, m);
546 if (error) {
547 struct ieee80211_node *ni;
548
549 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
550
551 /* XXX number of fragments */
552 if_inc_counter(ni->ni_vap->iv_ifp, IFCOUNTER_OERRORS, 1);
553 ieee80211_free_node(ni);
554 ieee80211_free_mbuf(m);
555 }
556 return (error);
557 }
558
559 /*
560 * Transmit a frame to the VAP interface.
561 */
562 int
563 ieee80211_vap_xmitpkt(struct ieee80211vap *vap, struct mbuf *m)
564 {
565 struct ifnet *ifp = vap->iv_ifp;
566
567 /*
568 * When transmitting via the VAP, we shouldn't hold
569 * any IC TX lock as the VAP TX path will acquire it.
570 */
571 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
572
573 return (ifp->if_transmit(ifp, m));
574
575 }
576
577 #include <sys/libkern.h>
578
579 void
580 get_random_bytes(void *p, size_t n)
581 {
582 uint8_t *dp = p;
583
584 while (n > 0) {
585 uint32_t v = arc4random();
586 size_t nb = n > sizeof(uint32_t) ? sizeof(uint32_t) : n;
587 bcopy(&v, dp, n > sizeof(uint32_t) ? sizeof(uint32_t) : n);
588 dp += sizeof(uint32_t), n -= nb;
589 }
590 }
591
592 /*
593 * Helper function for events that pass just a single mac address.
594 */
595 static void
596 notify_macaddr(struct ifnet *ifp, int op, const uint8_t mac[IEEE80211_ADDR_LEN])
597 {
598 struct ieee80211_join_event iev;
599
600 CURVNET_SET(ifp->if_vnet);
601 memset(&iev, 0, sizeof(iev));
602 IEEE80211_ADDR_COPY(iev.iev_addr, mac);
603 rt_ieee80211msg(ifp, op, &iev, sizeof(iev));
604 CURVNET_RESTORE();
605 }
606
607 void
608 ieee80211_notify_node_join(struct ieee80211_node *ni, int newassoc)
609 {
610 struct ieee80211vap *vap = ni->ni_vap;
611 struct ifnet *ifp = vap->iv_ifp;
612
613 CURVNET_SET_QUIET(ifp->if_vnet);
614 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode join",
615 (ni == vap->iv_bss) ? "bss " : "");
616
617 if (ni == vap->iv_bss) {
618 notify_macaddr(ifp, newassoc ?
619 RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC, ni->ni_bssid);
620 if_link_state_change(ifp, LINK_STATE_UP);
621 } else {
622 notify_macaddr(ifp, newassoc ?
623 RTM_IEEE80211_JOIN : RTM_IEEE80211_REJOIN, ni->ni_macaddr);
624 }
625 CURVNET_RESTORE();
626 }
627
628 void
629 ieee80211_notify_node_leave(struct ieee80211_node *ni)
630 {
631 struct ieee80211vap *vap = ni->ni_vap;
632 struct ifnet *ifp = vap->iv_ifp;
633
634 CURVNET_SET_QUIET(ifp->if_vnet);
635 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode leave",
636 (ni == vap->iv_bss) ? "bss " : "");
637
638 if (ni == vap->iv_bss) {
639 rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0);
640 if_link_state_change(ifp, LINK_STATE_DOWN);
641 } else {
642 /* fire off wireless event station leaving */
643 notify_macaddr(ifp, RTM_IEEE80211_LEAVE, ni->ni_macaddr);
644 }
645 CURVNET_RESTORE();
646 }
647
648 void
649 ieee80211_notify_scan_done(struct ieee80211vap *vap)
650 {
651 struct ifnet *ifp = vap->iv_ifp;
652
653 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s\n", "notify scan done");
654
655 /* dispatch wireless event indicating scan completed */
656 CURVNET_SET(ifp->if_vnet);
657 rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0);
658 CURVNET_RESTORE();
659 }
660
661 void
662 ieee80211_notify_replay_failure(struct ieee80211vap *vap,
663 const struct ieee80211_frame *wh, const struct ieee80211_key *k,
664 u_int64_t rsc, int tid)
665 {
666 struct ifnet *ifp = vap->iv_ifp;
667
668 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2,
669 "%s replay detected tid %d <rsc %ju, csc %ju, keyix %u rxkeyix %u>",
670 k->wk_cipher->ic_name, tid, (intmax_t) rsc,
671 (intmax_t) k->wk_keyrsc[tid],
672 k->wk_keyix, k->wk_rxkeyix);
673
674 if (ifp != NULL) { /* NB: for cipher test modules */
675 struct ieee80211_replay_event iev;
676
677 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1);
678 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2);
679 iev.iev_cipher = k->wk_cipher->ic_cipher;
680 if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE)
681 iev.iev_keyix = k->wk_rxkeyix;
682 else
683 iev.iev_keyix = k->wk_keyix;
684 iev.iev_keyrsc = k->wk_keyrsc[tid];
685 iev.iev_rsc = rsc;
686 CURVNET_SET(ifp->if_vnet);
687 rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev));
688 CURVNET_RESTORE();
689 }
690 }
691
692 void
693 ieee80211_notify_michael_failure(struct ieee80211vap *vap,
694 const struct ieee80211_frame *wh, u_int keyix)
695 {
696 struct ifnet *ifp = vap->iv_ifp;
697
698 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2,
699 "michael MIC verification failed <keyix %u>", keyix);
700 vap->iv_stats.is_rx_tkipmic++;
701
702 if (ifp != NULL) { /* NB: for cipher test modules */
703 struct ieee80211_michael_event iev;
704
705 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1);
706 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2);
707 iev.iev_cipher = IEEE80211_CIPHER_TKIP;
708 iev.iev_keyix = keyix;
709 CURVNET_SET(ifp->if_vnet);
710 rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev));
711 CURVNET_RESTORE();
712 }
713 }
714
715 void
716 ieee80211_notify_wds_discover(struct ieee80211_node *ni)
717 {
718 struct ieee80211vap *vap = ni->ni_vap;
719 struct ifnet *ifp = vap->iv_ifp;
720
721 notify_macaddr(ifp, RTM_IEEE80211_WDS, ni->ni_macaddr);
722 }
723
724 void
725 ieee80211_notify_csa(struct ieee80211com *ic,
726 const struct ieee80211_channel *c, int mode, int count)
727 {
728 struct ieee80211_csa_event iev;
729 struct ieee80211vap *vap;
730 struct ifnet *ifp;
731
732 memset(&iev, 0, sizeof(iev));
733 iev.iev_flags = c->ic_flags;
734 iev.iev_freq = c->ic_freq;
735 iev.iev_ieee = c->ic_ieee;
736 iev.iev_mode = mode;
737 iev.iev_count = count;
738 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
739 ifp = vap->iv_ifp;
740 CURVNET_SET(ifp->if_vnet);
741 rt_ieee80211msg(ifp, RTM_IEEE80211_CSA, &iev, sizeof(iev));
742 CURVNET_RESTORE();
743 }
744 }
745
746 void
747 ieee80211_notify_radar(struct ieee80211com *ic,
748 const struct ieee80211_channel *c)
749 {
750 struct ieee80211_radar_event iev;
751 struct ieee80211vap *vap;
752 struct ifnet *ifp;
753
754 memset(&iev, 0, sizeof(iev));
755 iev.iev_flags = c->ic_flags;
756 iev.iev_freq = c->ic_freq;
757 iev.iev_ieee = c->ic_ieee;
758 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
759 ifp = vap->iv_ifp;
760 CURVNET_SET(ifp->if_vnet);
761 rt_ieee80211msg(ifp, RTM_IEEE80211_RADAR, &iev, sizeof(iev));
762 CURVNET_RESTORE();
763 }
764 }
765
766 void
767 ieee80211_notify_cac(struct ieee80211com *ic,
768 const struct ieee80211_channel *c, enum ieee80211_notify_cac_event type)
769 {
770 struct ieee80211_cac_event iev;
771 struct ieee80211vap *vap;
772 struct ifnet *ifp;
773
774 memset(&iev, 0, sizeof(iev));
775 iev.iev_flags = c->ic_flags;
776 iev.iev_freq = c->ic_freq;
777 iev.iev_ieee = c->ic_ieee;
778 iev.iev_type = type;
779 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
780 ifp = vap->iv_ifp;
781 CURVNET_SET(ifp->if_vnet);
782 rt_ieee80211msg(ifp, RTM_IEEE80211_CAC, &iev, sizeof(iev));
783 CURVNET_RESTORE();
784 }
785 }
786
787 void
788 ieee80211_notify_node_deauth(struct ieee80211_node *ni)
789 {
790 struct ieee80211vap *vap = ni->ni_vap;
791 struct ifnet *ifp = vap->iv_ifp;
792
793 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node deauth");
794
795 notify_macaddr(ifp, RTM_IEEE80211_DEAUTH, ni->ni_macaddr);
796 }
797
798 void
799 ieee80211_notify_node_auth(struct ieee80211_node *ni)
800 {
801 struct ieee80211vap *vap = ni->ni_vap;
802 struct ifnet *ifp = vap->iv_ifp;
803
804 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node auth");
805
806 notify_macaddr(ifp, RTM_IEEE80211_AUTH, ni->ni_macaddr);
807 }
808
809 void
810 ieee80211_notify_country(struct ieee80211vap *vap,
811 const uint8_t bssid[IEEE80211_ADDR_LEN], const uint8_t cc[2])
812 {
813 struct ifnet *ifp = vap->iv_ifp;
814 struct ieee80211_country_event iev;
815
816 memset(&iev, 0, sizeof(iev));
817 IEEE80211_ADDR_COPY(iev.iev_addr, bssid);
818 iev.iev_cc[0] = cc[0];
819 iev.iev_cc[1] = cc[1];
820 CURVNET_SET(ifp->if_vnet);
821 rt_ieee80211msg(ifp, RTM_IEEE80211_COUNTRY, &iev, sizeof(iev));
822 CURVNET_RESTORE();
823 }
824
825 void
826 ieee80211_notify_radio(struct ieee80211com *ic, int state)
827 {
828 struct ieee80211_radio_event iev;
829 struct ieee80211vap *vap;
830 struct ifnet *ifp;
831
832 memset(&iev, 0, sizeof(iev));
833 iev.iev_state = state;
834 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
835 ifp = vap->iv_ifp;
836 CURVNET_SET(ifp->if_vnet);
837 rt_ieee80211msg(ifp, RTM_IEEE80211_RADIO, &iev, sizeof(iev));
838 CURVNET_RESTORE();
839 }
840 }
841
842 void
843 ieee80211_load_module(const char *modname)
844 {
845
846 #ifdef notyet
847 (void)kern_kldload(curthread, modname, NULL);
848 #else
849 printf("%s: load the %s module by hand for now.\n", __func__, modname);
850 #endif
851 }
852
853 static eventhandler_tag wlan_bpfevent;
854 static eventhandler_tag wlan_ifllevent;
855
856 static void
857 bpf_track(void *arg, struct ifnet *ifp, int dlt, int attach)
858 {
859 /* NB: identify vap's by if_init */
860 if (dlt == DLT_IEEE802_11_RADIO &&
861 ifp->if_init == ieee80211_init) {
862 struct ieee80211vap *vap = ifp->if_softc;
863 /*
864 * Track bpf radiotap listener state. We mark the vap
865 * to indicate if any listener is present and the com
866 * to indicate if any listener exists on any associated
867 * vap. This flag is used by drivers to prepare radiotap
868 * state only when needed.
869 */
870 if (attach) {
871 ieee80211_syncflag_ext(vap, IEEE80211_FEXT_BPF);
872 if (vap->iv_opmode == IEEE80211_M_MONITOR)
873 atomic_add_int(&vap->iv_ic->ic_montaps, 1);
874 } else if (!bpf_peers_present(vap->iv_rawbpf)) {
875 ieee80211_syncflag_ext(vap, -IEEE80211_FEXT_BPF);
876 if (vap->iv_opmode == IEEE80211_M_MONITOR)
877 atomic_subtract_int(&vap->iv_ic->ic_montaps, 1);
878 }
879 }
880 }
881
882 /*
883 * Change MAC address on the vap (if was not started).
884 */
885 static void
886 wlan_iflladdr(void *arg __unused, struct ifnet *ifp)
887 {
888 /* NB: identify vap's by if_init */
889 if (ifp->if_init == ieee80211_init &&
890 (ifp->if_flags & IFF_UP) == 0) {
891 struct ieee80211vap *vap = ifp->if_softc;
892
893 IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp));
894 }
895 }
896
897 /*
898 * Module glue.
899 *
900 * NB: the module name is "wlan" for compatibility with NetBSD.
901 */
902 static int
903 wlan_modevent(module_t mod, int type, void *unused)
904 {
905 switch (type) {
906 case MOD_LOAD:
907 if (bootverbose)
908 printf("wlan: <802.11 Link Layer>\n");
909 wlan_bpfevent = EVENTHANDLER_REGISTER(bpf_track,
910 bpf_track, 0, EVENTHANDLER_PRI_ANY);
911 wlan_ifllevent = EVENTHANDLER_REGISTER(iflladdr_event,
912 wlan_iflladdr, NULL, EVENTHANDLER_PRI_ANY);
913 wlan_cloner = if_clone_simple(wlanname, wlan_clone_create,
914 wlan_clone_destroy, 0);
915 return 0;
916 case MOD_UNLOAD:
917 if_clone_detach(wlan_cloner);
918 EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent);
919 EVENTHANDLER_DEREGISTER(iflladdr_event, wlan_ifllevent);
920 return 0;
921 }
922 return EINVAL;
923 }
924
925 static moduledata_t wlan_mod = {
926 wlanname,
927 wlan_modevent,
928 0
929 };
930 DECLARE_MODULE(wlan, wlan_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
931 MODULE_VERSION(wlan, 1);
932 MODULE_DEPEND(wlan, ether, 1, 1, 1);
933 #ifdef IEEE80211_ALQ
934 MODULE_DEPEND(wlan, alq, 1, 1, 1);
935 #endif /* IEEE80211_ALQ */
936
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