2 * Copyright (c) 2003-2009 Sam Leffler, Errno Consulting
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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.
25 * $FreeBSD: head/sys/net80211/ieee80211_freebsd.c 202612 2010-01-19 05:00:57Z thompsa $
30 * IEEE 802.11 support (DragonFlyBSD-specific code)
34 #include <sys/param.h>
35 #include <sys/kernel.h>
36 #include <sys/systm.h>
37 #include <sys/linker.h>
39 #include <sys/module.h>
41 #include <sys/sysctl.h>
43 #include <sys/socket.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/ifq_var.h>
55 #include <netproto/802_11/ieee80211_var.h>
56 #include <netproto/802_11/ieee80211_input.h>
58 SYSCTL_NODE(_net, OID_AUTO, wlan, CTLFLAG_RD, 0, "IEEE 80211 parameters");
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");
66 int ieee80211_force_swcrypto = 0;
67 SYSCTL_INT(_net_wlan, OID_AUTO, force_swcrypto, CTLFLAG_RW,
68 &ieee80211_force_swcrypto, 0, "force software crypto");
70 MALLOC_DEFINE(M_80211_COM, "80211com", "802.11 com state");
73 static void wlan_clone_destroy(struct ifnet *);
74 static int wlan_clone_create(struct if_clone *, int, caddr_t);
76 static struct if_clone wlan_cloner =
77 IF_CLONE_INITIALIZER("wlan", wlan_clone_create, wlan_clone_destroy,
80 struct lwkt_serialize wlan_global_serializer = LWKT_SERIALIZE_INITIALIZER;
83 * Allocate/free com structure in conjunction with ifnet;
84 * these routines are registered with if_register_com_alloc
85 * below and are called automatically by the ifnet code
86 * when the ifnet of the parent device is created.
89 wlan_alloc(u_char type, struct ifnet *ifp)
91 struct ieee80211com *ic;
93 ic = kmalloc(sizeof(struct ieee80211com), M_80211_COM, M_WAITOK|M_ZERO);
100 wlan_free(void *ic, u_char type)
102 kfree(ic, M_80211_COM);
106 wlan_clone_create(struct if_clone *ifc, int unit, caddr_t params)
108 struct ieee80211_clone_params cp;
109 struct ieee80211vap *vap;
110 struct ieee80211com *ic;
114 error = copyin(params, &cp, sizeof(cp));
117 ifp = ifunit(cp.icp_parent);
120 /* XXX move printfs to DIAGNOSTIC before release */
121 if (ifp->if_type != IFT_IEEE80211) {
122 if_printf(ifp, "%s: reject, not an 802.11 device\n", __func__);
125 if (cp.icp_opmode >= IEEE80211_OPMODE_MAX) {
126 if_printf(ifp, "%s: invalid opmode %d\n",
127 __func__, cp.icp_opmode);
131 if ((ic->ic_caps & ieee80211_opcap[cp.icp_opmode]) == 0) {
132 if_printf(ifp, "%s mode not supported\n",
133 ieee80211_opmode_name[cp.icp_opmode]);
136 if ((cp.icp_flags & IEEE80211_CLONE_TDMA) &&
137 #ifdef IEEE80211_SUPPORT_TDMA
138 (ic->ic_caps & IEEE80211_C_TDMA) == 0
143 if_printf(ifp, "TDMA not supported\n");
146 vap = ic->ic_vap_create(ic, ifc->ifc_name, unit,
147 cp.icp_opmode, cp.icp_flags, cp.icp_bssid,
148 cp.icp_flags & IEEE80211_CLONE_MACADDR ?
149 cp.icp_macaddr : (const uint8_t *)IF_LLADDR(ifp));
150 return (vap == NULL ? EIO : 0);
154 wlan_clone_destroy(struct ifnet *ifp)
156 struct ieee80211vap *vap = ifp->if_softc;
157 struct ieee80211com *ic = vap->iv_ic;
159 wlan_serialize_enter(); /* WARNING must be global serializer */
160 ic->ic_vap_delete(vap);
161 wlan_serialize_exit();
164 const char *wlan_last_enter_func;
165 const char *wlan_last_exit_func;
167 * These serializer functions are used by wlan and all drivers.
170 _wlan_serialize_enter(const char *funcname)
172 lwkt_serialize_enter(&wlan_global_serializer);
173 wlan_last_enter_func = funcname;
177 _wlan_serialize_exit(const char *funcname)
179 lwkt_serialize_exit(&wlan_global_serializer);
180 wlan_last_exit_func = funcname;
184 wlan_serialize_sleep(void *ident, int flags, const char *wmesg, int timo)
186 return(zsleep(ident, &wlan_global_serializer, flags, wmesg, timo));
190 * condition-var functions which interlock the ic lock (which is now
191 * just wlan_global_serializer)
194 wlan_cv_init(struct cv *cv, const char *desc)
201 wlan_cv_timedwait(struct cv *cv, int ticks)
206 error = wlan_serialize_sleep(cv, 0, cv->cv_desc, ticks);
211 wlan_cv_wait(struct cv *cv)
214 wlan_serialize_sleep(cv, 0, cv->cv_desc, 0);
218 wlan_cv_signal(struct cv *cv, int broadcast)
220 if (cv->cv_waiters) {
235 ieee80211_vap_destroy(struct ieee80211vap *vap)
237 wlan_assert_serialized();
238 wlan_serialize_exit();
239 if_clone_destroy(vap->iv_ifp->if_xname);
240 wlan_serialize_enter();
244 * NOTE: This handler is used generally to convert milliseconds
245 * to ticks for various simple sysctl variables and does not
246 * need to be serialized.
249 ieee80211_sysctl_msecs_ticks(SYSCTL_HANDLER_ARGS)
251 int msecs = ticks_to_msecs(*(int *)arg1);
254 error = sysctl_handle_int(oidp, &msecs, 0, req);
255 if (error == 0 && req->newptr) {
256 t = msecs_to_ticks(msecs);
257 *(int *)arg1 = (t < 1) ? 1 : t;
264 ieee80211_sysctl_inact(SYSCTL_HANDLER_ARGS)
266 int inact = (*(int *)arg1) * IEEE80211_INACT_WAIT;
269 error = sysctl_handle_int(oidp, &inact, 0, req);
270 wlan_serialize_enter();
271 if (error == 0 && req->newptr)
272 *(int *)arg1 = inact / IEEE80211_INACT_WAIT;
273 wlan_serialize_exit();
279 ieee80211_sysctl_parent(SYSCTL_HANDLER_ARGS)
281 struct ieee80211com *ic = arg1;
282 const char *name = ic->ic_ifp->if_xname;
284 return SYSCTL_OUT(req, name, strlen(name));
288 ieee80211_sysctl_radar(SYSCTL_HANDLER_ARGS)
290 struct ieee80211com *ic = arg1;
293 error = sysctl_handle_int(oidp, &t, 0, req);
294 wlan_serialize_enter();
295 if (error == 0 && req->newptr)
296 ieee80211_dfs_notify_radar(ic, ic->ic_curchan);
297 wlan_serialize_exit();
303 ieee80211_sysctl_attach(struct ieee80211com *ic)
308 ieee80211_sysctl_detach(struct ieee80211com *ic)
313 ieee80211_sysctl_vattach(struct ieee80211vap *vap)
315 struct ifnet *ifp = vap->iv_ifp;
316 struct sysctl_ctx_list *ctx;
317 struct sysctl_oid *oid;
318 char num[14]; /* sufficient for 32 bits */
320 ctx = (struct sysctl_ctx_list *) kmalloc(sizeof(struct sysctl_ctx_list),
321 M_DEVBUF, M_INTWAIT | M_ZERO);
323 if_printf(ifp, "%s: cannot allocate sysctl context!\n",
327 sysctl_ctx_init(ctx);
328 ksnprintf(num, sizeof(num), "%u", ifp->if_dunit);
329 oid = SYSCTL_ADD_NODE(ctx, &SYSCTL_NODE_CHILDREN(_net, wlan),
330 OID_AUTO, num, CTLFLAG_RD, NULL, "");
331 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
332 "%parent", CTLFLAG_RD, vap->iv_ic, 0,
333 ieee80211_sysctl_parent, "A", "parent device");
334 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
335 "driver_caps", CTLFLAG_RW, &vap->iv_caps, 0,
336 "driver capabilities");
337 #ifdef IEEE80211_DEBUG
338 vap->iv_debug = ieee80211_debug;
339 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
340 "debug", CTLFLAG_RW, &vap->iv_debug, 0,
341 "control debugging printfs");
343 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
344 "bmiss_max", CTLFLAG_RW, &vap->iv_bmiss_max, 0,
345 "consecutive beacon misses before scanning");
346 /* XXX inherit from tunables */
347 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
348 "inact_run", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_run, 0,
349 ieee80211_sysctl_inact, "I",
350 "station inactivity timeout (sec)");
351 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
352 "inact_probe", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_probe, 0,
353 ieee80211_sysctl_inact, "I",
354 "station inactivity probe timeout (sec)");
355 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
356 "inact_auth", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_auth, 0,
357 ieee80211_sysctl_inact, "I",
358 "station authentication timeout (sec)");
359 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
360 "inact_init", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_init, 0,
361 ieee80211_sysctl_inact, "I",
362 "station initial state timeout (sec)");
363 if (vap->iv_htcaps & IEEE80211_HTC_HT) {
364 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
365 "ampdu_mintraffic_bk", CTLFLAG_RW,
366 &vap->iv_ampdu_mintraffic[WME_AC_BK], 0,
367 "BK traffic tx aggr threshold (pps)");
368 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
369 "ampdu_mintraffic_be", CTLFLAG_RW,
370 &vap->iv_ampdu_mintraffic[WME_AC_BE], 0,
371 "BE traffic tx aggr threshold (pps)");
372 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
373 "ampdu_mintraffic_vo", CTLFLAG_RW,
374 &vap->iv_ampdu_mintraffic[WME_AC_VO], 0,
375 "VO traffic tx aggr threshold (pps)");
376 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
377 "ampdu_mintraffic_vi", CTLFLAG_RW,
378 &vap->iv_ampdu_mintraffic[WME_AC_VI], 0,
379 "VI traffic tx aggr threshold (pps)");
381 if (vap->iv_caps & IEEE80211_C_DFS) {
382 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
383 "radar", CTLTYPE_INT | CTLFLAG_RW, vap->iv_ic, 0,
384 ieee80211_sysctl_radar, "I", "simulate radar event");
386 vap->iv_sysctl = ctx;
391 ieee80211_sysctl_vdetach(struct ieee80211vap *vap)
394 if (vap->iv_sysctl != NULL) {
395 sysctl_ctx_free(vap->iv_sysctl);
396 kfree(vap->iv_sysctl, M_DEVBUF);
397 vap->iv_sysctl = NULL;
402 ieee80211_node_dectestref(struct ieee80211_node *ni)
404 /* XXX need equivalent of atomic_dec_and_test */
405 atomic_subtract_int(&ni->ni_refcnt, 1);
406 return atomic_cmpset_int(&ni->ni_refcnt, 0, 1);
410 ieee80211_drain_ifq(struct ifqueue *ifq)
412 struct ieee80211_node *ni;
415 wlan_assert_serialized();
421 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
422 KASSERT(ni != NULL, ("frame w/o node"));
423 ieee80211_free_node(ni);
424 m->m_pkthdr.rcvif = NULL;
431 ieee80211_flush_ifq(struct ifqueue *ifq, struct ieee80211vap *vap)
433 struct ieee80211_node *ni;
434 struct mbuf *m, **mprev;
436 wlan_assert_serialized();
437 mprev = &ifq->ifq_head;
438 while ((m = *mprev) != NULL) {
439 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
440 if (ni != NULL && ni->ni_vap == vap) {
441 *mprev = m->m_nextpkt; /* remove from list */
445 ieee80211_free_node(ni); /* reclaim ref */
447 mprev = &m->m_nextpkt;
449 /* recalculate tail ptr */
451 for (; m != NULL && m->m_nextpkt != NULL; m = m->m_nextpkt)
457 * As above, for mbufs allocated with m_gethdr/MGETHDR
458 * or initialized by M_COPY_PKTHDR.
460 #define MC_ALIGN(m, len) \
462 (m)->m_data += (MCLBYTES - (len)) &~ (sizeof(long) - 1); \
463 } while (/* CONSTCOND */ 0)
466 * Allocate and setup a management frame of the specified
467 * size. We return the mbuf and a pointer to the start
468 * of the contiguous data area that's been reserved based
469 * on the packet length. The data area is forced to 32-bit
470 * alignment and the buffer length to a multiple of 4 bytes.
471 * This is done mainly so beacon frames (that require this)
472 * can use this interface too.
475 ieee80211_getmgtframe(uint8_t **frm, int headroom, int pktlen)
481 * NB: we know the mbuf routines will align the data area
482 * so we don't need to do anything special.
484 len = roundup2(headroom + pktlen, 4);
485 KASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len));
486 if (len < MINCLSIZE) {
487 m = m_gethdr(MB_DONTWAIT, MT_DATA);
489 * Align the data in case additional headers are added.
490 * This should only happen when a WEP header is added
491 * which only happens for shared key authentication mgt
492 * frames which all fit in MHLEN.
497 m = m_getcl(MB_DONTWAIT, MT_DATA, M_PKTHDR);
502 m->m_data += headroom;
509 * Re-align the payload in the mbuf. This is mainly used (right now)
510 * to handle IP header alignment requirements on certain architectures.
513 ieee80211_realign(struct ieee80211vap *vap, struct mbuf *m, size_t align)
516 struct mbuf *n = NULL;
518 pktlen = m->m_pkthdr.len;
519 space = pktlen + align;
520 if (space < MINCLSIZE)
521 n = m_gethdr(MB_DONTWAIT, MT_DATA);
524 n = m_getjcl(MB_DONTWAIT, MT_DATA, M_PKTHDR,
525 space <= MCLBYTES ? MCLBYTES :
526 #if MJUMPAGESIZE != MCLBYTES
527 space <= MJUMPAGESIZE ? MJUMPAGESIZE :
529 space <= MJUM9BYTES ? MJUM9BYTES : MJUM16BYTES);
532 if (__predict_true(n != NULL)) {
534 n->m_data = (caddr_t)(ALIGN(n->m_data + align) - align);
535 m_copydata(m, 0, pktlen, mtod(n, caddr_t));
538 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
539 mtod(m, const struct ieee80211_frame *), NULL,
540 "%s", "no mbuf to realign");
541 vap->iv_stats.is_rx_badalign++;
548 ieee80211_add_callback(struct mbuf *m,
549 void (*func)(struct ieee80211_node *, void *, int), void *arg)
552 struct ieee80211_cb *cb;
554 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_CALLBACK,
555 sizeof(struct ieee80211_cb), M_INTWAIT);
559 cb = (struct ieee80211_cb *)(mtag+1);
562 m_tag_prepend(m, mtag);
563 m->m_flags |= M_TXCB;
568 ieee80211_process_callback(struct ieee80211_node *ni,
569 struct mbuf *m, int status)
573 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, NULL);
575 struct ieee80211_cb *cb = (struct ieee80211_cb *)(mtag+1);
576 cb->func(ni, cb->arg, status);
580 #include <sys/libkern.h>
583 get_random_bytes(void *p, size_t n)
588 uint32_t v = karc4random();
589 size_t nb = n > sizeof(uint32_t) ? sizeof(uint32_t) : n;
590 bcopy(&v, dp, n > sizeof(uint32_t) ? sizeof(uint32_t) : n);
591 dp += sizeof(uint32_t), n -= nb;
596 * Helper function for events that pass just a single mac address.
599 notify_macaddr(struct ifnet *ifp, int op, const uint8_t mac[IEEE80211_ADDR_LEN])
601 struct ieee80211_join_event iev;
603 memset(&iev, 0, sizeof(iev));
604 IEEE80211_ADDR_COPY(iev.iev_addr, mac);
605 rt_ieee80211msg(ifp, op, &iev, sizeof(iev));
609 ieee80211_notify_node_join(struct ieee80211_node *ni, int newassoc)
611 struct ieee80211vap *vap = ni->ni_vap;
612 struct ifnet *ifp = vap->iv_ifp;
614 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode join",
615 (ni == vap->iv_bss) ? "bss " : "");
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);
622 notify_macaddr(ifp, newassoc ?
623 RTM_IEEE80211_JOIN : RTM_IEEE80211_REJOIN, ni->ni_macaddr);
628 ieee80211_notify_node_leave(struct ieee80211_node *ni)
630 struct ieee80211vap *vap = ni->ni_vap;
631 struct ifnet *ifp = vap->iv_ifp;
633 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode leave",
634 (ni == vap->iv_bss) ? "bss " : "");
636 if (ni == vap->iv_bss) {
637 rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0);
638 if_link_state_change(ifp);
640 /* fire off wireless event station leaving */
641 notify_macaddr(ifp, RTM_IEEE80211_LEAVE, ni->ni_macaddr);
646 ieee80211_notify_scan_done(struct ieee80211vap *vap)
648 struct ifnet *ifp = vap->iv_ifp;
650 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s\n", "notify scan done");
652 /* dispatch wireless event indicating scan completed */
653 rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0);
657 ieee80211_notify_replay_failure(struct ieee80211vap *vap,
658 const struct ieee80211_frame *wh, const struct ieee80211_key *k,
659 u_int64_t rsc, int tid)
661 struct ifnet *ifp = vap->iv_ifp;
663 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2,
664 "%s replay detected <rsc %ju, csc %ju, keyix %u rxkeyix %u>",
665 k->wk_cipher->ic_name, (intmax_t) rsc,
666 (intmax_t) k->wk_keyrsc[tid],
667 k->wk_keyix, k->wk_rxkeyix);
669 if (ifp != NULL) { /* NB: for cipher test modules */
670 struct ieee80211_replay_event iev;
672 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1);
673 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2);
674 iev.iev_cipher = k->wk_cipher->ic_cipher;
675 if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE)
676 iev.iev_keyix = k->wk_rxkeyix;
678 iev.iev_keyix = k->wk_keyix;
679 iev.iev_keyrsc = k->wk_keyrsc[tid];
681 rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev));
686 ieee80211_notify_michael_failure(struct ieee80211vap *vap,
687 const struct ieee80211_frame *wh, u_int keyix)
689 struct ifnet *ifp = vap->iv_ifp;
691 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2,
692 "michael MIC verification failed <keyix %u>", keyix);
693 vap->iv_stats.is_rx_tkipmic++;
695 if (ifp != NULL) { /* NB: for cipher test modules */
696 struct ieee80211_michael_event iev;
698 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1);
699 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2);
700 iev.iev_cipher = IEEE80211_CIPHER_TKIP;
701 iev.iev_keyix = keyix;
702 rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev));
707 ieee80211_notify_wds_discover(struct ieee80211_node *ni)
709 struct ieee80211vap *vap = ni->ni_vap;
710 struct ifnet *ifp = vap->iv_ifp;
712 notify_macaddr(ifp, RTM_IEEE80211_WDS, ni->ni_macaddr);
716 ieee80211_notify_csa(struct ieee80211com *ic,
717 const struct ieee80211_channel *c, int mode, int count)
719 struct ifnet *ifp = ic->ic_ifp;
720 struct ieee80211_csa_event iev;
722 memset(&iev, 0, sizeof(iev));
723 iev.iev_flags = c->ic_flags;
724 iev.iev_freq = c->ic_freq;
725 iev.iev_ieee = c->ic_ieee;
727 iev.iev_count = count;
728 rt_ieee80211msg(ifp, RTM_IEEE80211_CSA, &iev, sizeof(iev));
732 ieee80211_notify_radar(struct ieee80211com *ic,
733 const struct ieee80211_channel *c)
735 struct ifnet *ifp = ic->ic_ifp;
736 struct ieee80211_radar_event iev;
738 memset(&iev, 0, sizeof(iev));
739 iev.iev_flags = c->ic_flags;
740 iev.iev_freq = c->ic_freq;
741 iev.iev_ieee = c->ic_ieee;
742 rt_ieee80211msg(ifp, RTM_IEEE80211_RADAR, &iev, sizeof(iev));
746 ieee80211_notify_cac(struct ieee80211com *ic,
747 const struct ieee80211_channel *c, enum ieee80211_notify_cac_event type)
749 struct ifnet *ifp = ic->ic_ifp;
750 struct ieee80211_cac_event iev;
752 memset(&iev, 0, sizeof(iev));
753 iev.iev_flags = c->ic_flags;
754 iev.iev_freq = c->ic_freq;
755 iev.iev_ieee = c->ic_ieee;
757 rt_ieee80211msg(ifp, RTM_IEEE80211_CAC, &iev, sizeof(iev));
761 ieee80211_notify_node_deauth(struct ieee80211_node *ni)
763 struct ieee80211vap *vap = ni->ni_vap;
764 struct ifnet *ifp = vap->iv_ifp;
766 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node deauth");
768 notify_macaddr(ifp, RTM_IEEE80211_DEAUTH, ni->ni_macaddr);
772 ieee80211_notify_node_auth(struct ieee80211_node *ni)
774 struct ieee80211vap *vap = ni->ni_vap;
775 struct ifnet *ifp = vap->iv_ifp;
777 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node auth");
779 notify_macaddr(ifp, RTM_IEEE80211_AUTH, ni->ni_macaddr);
783 ieee80211_notify_country(struct ieee80211vap *vap,
784 const uint8_t bssid[IEEE80211_ADDR_LEN], const uint8_t cc[2])
786 struct ifnet *ifp = vap->iv_ifp;
787 struct ieee80211_country_event iev;
789 memset(&iev, 0, sizeof(iev));
790 IEEE80211_ADDR_COPY(iev.iev_addr, bssid);
791 iev.iev_cc[0] = cc[0];
792 iev.iev_cc[1] = cc[1];
793 rt_ieee80211msg(ifp, RTM_IEEE80211_COUNTRY, &iev, sizeof(iev));
797 ieee80211_notify_radio(struct ieee80211com *ic, int state)
799 struct ifnet *ifp = ic->ic_ifp;
800 struct ieee80211_radio_event iev;
802 memset(&iev, 0, sizeof(iev));
803 iev.iev_state = state;
804 rt_ieee80211msg(ifp, RTM_IEEE80211_RADIO, &iev, sizeof(iev));
808 ieee80211_handoff(struct ifnet *dst_ifp, struct mbuf *m)
812 /* We may be sending a fragment so traverse the mbuf */
813 wlan_assert_serialized();
814 wlan_serialize_exit();
816 struct altq_pktattr pktattr;
821 if (ifq_is_enabled(&dst_ifp->if_snd))
822 altq_etherclassify(&dst_ifp->if_snd, m, &pktattr);
824 ifq_dispatch(dst_ifp, m, &pktattr);
826 wlan_serialize_enter();
831 /* IEEE Std 802.11a-1999, page 9, table 79 */
832 #define IEEE80211_OFDM_SYM_TIME 4
833 #define IEEE80211_OFDM_PREAMBLE_TIME 16
834 #define IEEE80211_OFDM_SIGNAL_TIME 4
835 /* IEEE Std 802.11g-2003, page 44 */
836 #define IEEE80211_OFDM_SIGNAL_EXT_TIME 6
838 /* IEEE Std 802.11a-1999, page 7, figure 107 */
839 #define IEEE80211_OFDM_PLCP_SERVICE_NBITS 16
840 #define IEEE80211_OFDM_TAIL_NBITS 6
842 #define IEEE80211_OFDM_NBITS(frmlen) \
843 (IEEE80211_OFDM_PLCP_SERVICE_NBITS + \
844 ((frmlen) * NBBY) + \
845 IEEE80211_OFDM_TAIL_NBITS)
847 #define IEEE80211_OFDM_NBITS_PER_SYM(kbps) \
848 (((kbps) * IEEE80211_OFDM_SYM_TIME) / 1000)
850 #define IEEE80211_OFDM_NSYMS(kbps, frmlen) \
851 howmany(IEEE80211_OFDM_NBITS((frmlen)), \
852 IEEE80211_OFDM_NBITS_PER_SYM((kbps)))
854 #define IEEE80211_OFDM_TXTIME(kbps, frmlen) \
855 (IEEE80211_OFDM_PREAMBLE_TIME + \
856 IEEE80211_OFDM_SIGNAL_TIME + \
857 (IEEE80211_OFDM_NSYMS((kbps), (frmlen)) * IEEE80211_OFDM_SYM_TIME))
859 /* IEEE Std 802.11b-1999, page 28, subclause 18.3.4 */
860 #define IEEE80211_CCK_PREAMBLE_LEN 144
861 #define IEEE80211_CCK_PLCP_HDR_TIME 48
862 #define IEEE80211_CCK_SHPREAMBLE_LEN 72
863 #define IEEE80211_CCK_SHPLCP_HDR_TIME 24
865 #define IEEE80211_CCK_NBITS(frmlen) ((frmlen) * NBBY)
866 #define IEEE80211_CCK_TXTIME(kbps, frmlen) \
867 (((IEEE80211_CCK_NBITS((frmlen)) * 1000) + (kbps) - 1) / (kbps))
870 ieee80211_txtime(struct ieee80211_node *ni, u_int len, uint8_t rs_rate,
873 struct ieee80211vap *vap = ni->ni_vap;
877 rs_rate &= IEEE80211_RATE_VAL;
878 rate = rs_rate * 500; /* ieee80211 rate -> kbps */
880 if (vap->iv_ic->ic_phytype == IEEE80211_T_OFDM) {
882 * IEEE Std 802.11a-1999, page 37, equation (29)
883 * IEEE Std 802.11g-2003, page 44, equation (42)
885 txtime = IEEE80211_OFDM_TXTIME(rate, len);
886 if (vap->iv_ic->ic_curmode == IEEE80211_MODE_11G)
887 txtime += IEEE80211_OFDM_SIGNAL_EXT_TIME;
890 * IEEE Std 802.11b-1999, page 28, subclause 18.3.4
891 * IEEE Std 802.11g-2003, page 45, equation (43)
893 if (vap->iv_ic->ic_phytype == IEEE80211_T_OFDM_QUARTER+1)
895 txtime = IEEE80211_CCK_TXTIME(rate, len);
898 * Short preamble is not applicable for DS 1Mbits/s
900 if (rs_rate != 2 && (flags & IEEE80211_F_SHPREAMBLE)) {
901 txtime += IEEE80211_CCK_SHPREAMBLE_LEN +
902 IEEE80211_CCK_SHPLCP_HDR_TIME;
904 txtime += IEEE80211_CCK_PREAMBLE_LEN +
905 IEEE80211_CCK_PLCP_HDR_TIME;
912 ieee80211_load_module(const char *modname)
916 (void)kern_kldload(curthread, modname, NULL);
918 kprintf("%s: load the %s module by hand for now.\n", __func__, modname);
922 static eventhandler_tag wlan_bpfevent;
923 static eventhandler_tag wlan_ifllevent;
926 bpf_track_event(void *arg, struct ifnet *ifp, int dlt, int attach)
928 /* NB: identify vap's by if_start */
930 wlan_serialize_enter();
931 if (dlt == DLT_IEEE802_11_RADIO && ifp->if_start == ieee80211_start) {
932 struct ieee80211vap *vap = ifp->if_softc;
934 * Track bpf radiotap listener state. We mark the vap
935 * to indicate if any listener is present and the com
936 * to indicate if any listener exists on any associated
937 * vap. This flag is used by drivers to prepare radiotap
938 * state only when needed.
941 ieee80211_syncflag_ext(vap, IEEE80211_FEXT_BPF);
942 if (vap->iv_opmode == IEEE80211_M_MONITOR)
943 atomic_add_int(&vap->iv_ic->ic_montaps, 1);
944 } else if (!vap->iv_rawbpf) {
945 ieee80211_syncflag_ext(vap, -IEEE80211_FEXT_BPF);
946 if (vap->iv_opmode == IEEE80211_M_MONITOR)
947 atomic_subtract_int(&vap->iv_ic->ic_montaps, 1);
950 wlan_serialize_exit();
954 wlan_iflladdr_event(void *arg __unused, struct ifnet *ifp)
956 struct ieee80211com *ic = ifp->if_l2com;
957 struct ieee80211vap *vap, *next;
959 wlan_serialize_enter();
960 if (ifp->if_type != IFT_IEEE80211 || ic == NULL) {
961 wlan_serialize_exit();
965 TAILQ_FOREACH_MUTABLE(vap, &ic->ic_vaps, iv_next, next) {
967 * If the MAC address has changed on the parent and it was
968 * copied to the vap on creation then re-sync.
970 if (vap->iv_ic == ic &&
971 (vap->iv_flags_ext & IEEE80211_FEXT_UNIQMAC) == 0) {
972 IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp));
973 wlan_serialize_exit();
974 if_setlladdr(vap->iv_ifp, IF_LLADDR(ifp),
976 wlan_serialize_enter();
979 wlan_serialize_exit();
985 * NB: the module name is "wlan" for compatibility with NetBSD.
988 wlan_modevent(module_t mod, int type, void *unused)
992 wlan_serialize_enter();
997 kprintf("wlan: <802.11 Link Layer>\n");
998 wlan_bpfevent = EVENTHANDLER_REGISTER(bpf_track,
1000 EVENTHANDLER_PRI_ANY);
1001 if (wlan_bpfevent == NULL) {
1005 wlan_ifllevent = EVENTHANDLER_REGISTER(iflladdr_event,
1006 wlan_iflladdr_event, NULL,
1007 EVENTHANDLER_PRI_ANY);
1008 if (wlan_ifllevent == NULL) {
1009 EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent);
1013 if_clone_attach(&wlan_cloner);
1014 if_register_com_alloc(IFT_IEEE80211, wlan_alloc, wlan_free);
1018 if_deregister_com_alloc(IFT_IEEE80211);
1019 if_clone_detach(&wlan_cloner);
1020 EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent);
1021 EVENTHANDLER_DEREGISTER(iflladdr_event, wlan_ifllevent);
1028 wlan_serialize_exit();
1033 static moduledata_t wlan_mod = {
1038 DECLARE_MODULE(wlan, wlan_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
1039 MODULE_VERSION(wlan, 1);
1040 MODULE_DEPEND(wlan, ether, 1, 1, 1);