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 MALLOC_DEFINE(M_80211_COM, "80211com", "802.11 com state");
69 static void wlan_clone_destroy(struct ifnet *);
70 static int wlan_clone_create(struct if_clone *, int, caddr_t);
72 static struct if_clone wlan_cloner =
73 IF_CLONE_INITIALIZER("wlan", wlan_clone_create, wlan_clone_destroy,
76 struct lwkt_serialize wlan_global_serializer = LWKT_SERIALIZE_INITIALIZER;
79 * Allocate/free com structure in conjunction with ifnet;
80 * these routines are registered with if_register_com_alloc
81 * below and are called automatically by the ifnet code
82 * when the ifnet of the parent device is created.
85 wlan_alloc(u_char type, struct ifnet *ifp)
87 struct ieee80211com *ic;
89 ic = kmalloc(sizeof(struct ieee80211com), M_80211_COM, M_WAITOK|M_ZERO);
96 wlan_free(void *ic, u_char type)
98 kfree(ic, M_80211_COM);
102 wlan_clone_create(struct if_clone *ifc, int unit, caddr_t params)
104 struct ieee80211_clone_params cp;
105 struct ieee80211vap *vap;
106 struct ieee80211com *ic;
110 error = copyin(params, &cp, sizeof(cp));
113 ifp = ifunit(cp.icp_parent);
116 /* XXX move printfs to DIAGNOSTIC before release */
117 if (ifp->if_type != IFT_IEEE80211) {
118 if_printf(ifp, "%s: reject, not an 802.11 device\n", __func__);
121 if (cp.icp_opmode >= IEEE80211_OPMODE_MAX) {
122 if_printf(ifp, "%s: invalid opmode %d\n",
123 __func__, cp.icp_opmode);
127 if ((ic->ic_caps & ieee80211_opcap[cp.icp_opmode]) == 0) {
128 if_printf(ifp, "%s mode not supported\n",
129 ieee80211_opmode_name[cp.icp_opmode]);
132 if ((cp.icp_flags & IEEE80211_CLONE_TDMA) &&
133 #ifdef IEEE80211_SUPPORT_TDMA
134 (ic->ic_caps & IEEE80211_C_TDMA) == 0
139 if_printf(ifp, "TDMA not supported\n");
142 vap = ic->ic_vap_create(ic, ifc->ifc_name, unit,
143 cp.icp_opmode, cp.icp_flags, cp.icp_bssid,
144 cp.icp_flags & IEEE80211_CLONE_MACADDR ?
145 cp.icp_macaddr : (const uint8_t *)IF_LLADDR(ifp));
146 return (vap == NULL ? EIO : 0);
150 wlan_clone_destroy(struct ifnet *ifp)
152 struct ieee80211vap *vap = ifp->if_softc;
153 struct ieee80211com *ic = vap->iv_ic;
155 ic->ic_vap_delete(vap);
158 const char *wlan_last_enter_func;
159 const char *wlan_last_exit_func;
161 * These serializer functions are used by wlan and all drivers.
164 _wlan_serialize_enter(const char *funcname)
166 lwkt_serialize_enter(&wlan_global_serializer);
167 wlan_last_enter_func = funcname;
171 _wlan_serialize_exit(const char *funcname)
173 lwkt_serialize_exit(&wlan_global_serializer);
174 wlan_last_exit_func = funcname;
178 wlan_serialize_sleep(void *ident, int flags, const char *wmesg, int timo)
180 return(zsleep(ident, &wlan_global_serializer, flags, wmesg, timo));
184 * condition-var functions which interlock the ic lock (which is now
185 * just wlan_global_serializer)
188 wlan_cv_init(struct cv *cv, const char *desc)
195 wlan_cv_timedwait(struct cv *cv, int ticks)
200 error = wlan_serialize_sleep(cv, 0, cv->cv_desc, ticks);
205 wlan_cv_wait(struct cv *cv)
208 wlan_serialize_sleep(cv, 0, cv->cv_desc, 0);
212 wlan_cv_signal(struct cv *cv, int broadcast)
214 if (cv->cv_waiters) {
229 ieee80211_vap_destroy(struct ieee80211vap *vap)
231 if_clone_destroy(vap->iv_ifp->if_xname);
235 * NOTE: This handler is used generally to convert milliseconds
236 * to ticks for various simple sysctl variables and does not
237 * need to be serialized.
240 ieee80211_sysctl_msecs_ticks(SYSCTL_HANDLER_ARGS)
242 int msecs = ticks_to_msecs(*(int *)arg1);
245 error = sysctl_handle_int(oidp, &msecs, 0, req);
246 if (error == 0 && req->newptr) {
247 t = msecs_to_ticks(msecs);
248 *(int *)arg1 = (t < 1) ? 1 : t;
255 ieee80211_sysctl_inact(SYSCTL_HANDLER_ARGS)
257 int inact = (*(int *)arg1) * IEEE80211_INACT_WAIT;
260 error = sysctl_handle_int(oidp, &inact, 0, req);
261 wlan_serialize_enter();
262 if (error == 0 && req->newptr)
263 *(int *)arg1 = inact / IEEE80211_INACT_WAIT;
264 wlan_serialize_exit();
270 ieee80211_sysctl_parent(SYSCTL_HANDLER_ARGS)
272 struct ieee80211com *ic = arg1;
273 const char *name = ic->ic_ifp->if_xname;
275 return SYSCTL_OUT(req, name, strlen(name));
279 ieee80211_sysctl_radar(SYSCTL_HANDLER_ARGS)
281 struct ieee80211com *ic = arg1;
284 error = sysctl_handle_int(oidp, &t, 0, req);
285 wlan_serialize_enter();
286 if (error == 0 && req->newptr)
287 ieee80211_dfs_notify_radar(ic, ic->ic_curchan);
288 wlan_serialize_exit();
294 ieee80211_sysctl_attach(struct ieee80211com *ic)
299 ieee80211_sysctl_detach(struct ieee80211com *ic)
304 ieee80211_sysctl_vattach(struct ieee80211vap *vap)
306 struct ifnet *ifp = vap->iv_ifp;
307 struct sysctl_ctx_list *ctx;
308 struct sysctl_oid *oid;
309 char num[14]; /* sufficient for 32 bits */
311 ctx = (struct sysctl_ctx_list *) kmalloc(sizeof(struct sysctl_ctx_list),
312 M_DEVBUF, M_INTWAIT | M_ZERO);
314 if_printf(ifp, "%s: cannot allocate sysctl context!\n",
318 sysctl_ctx_init(ctx);
319 ksnprintf(num, sizeof(num), "%u", ifp->if_dunit);
320 oid = SYSCTL_ADD_NODE(ctx, &SYSCTL_NODE_CHILDREN(_net, wlan),
321 OID_AUTO, num, CTLFLAG_RD, NULL, "");
322 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
323 "%parent", CTLFLAG_RD, vap->iv_ic, 0,
324 ieee80211_sysctl_parent, "A", "parent device");
325 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
326 "driver_caps", CTLFLAG_RW, &vap->iv_caps, 0,
327 "driver capabilities");
328 #ifdef IEEE80211_DEBUG
329 vap->iv_debug = ieee80211_debug;
330 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
331 "debug", CTLFLAG_RW, &vap->iv_debug, 0,
332 "control debugging printfs");
334 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
335 "bmiss_max", CTLFLAG_RW, &vap->iv_bmiss_max, 0,
336 "consecutive beacon misses before scanning");
337 /* XXX inherit from tunables */
338 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
339 "inact_run", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_run, 0,
340 ieee80211_sysctl_inact, "I",
341 "station inactivity timeout (sec)");
342 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
343 "inact_probe", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_probe, 0,
344 ieee80211_sysctl_inact, "I",
345 "station inactivity probe timeout (sec)");
346 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
347 "inact_auth", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_auth, 0,
348 ieee80211_sysctl_inact, "I",
349 "station authentication timeout (sec)");
350 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
351 "inact_init", CTLTYPE_INT | CTLFLAG_RW, &vap->iv_inact_init, 0,
352 ieee80211_sysctl_inact, "I",
353 "station initial state timeout (sec)");
354 if (vap->iv_htcaps & IEEE80211_HTC_HT) {
355 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
356 "ampdu_mintraffic_bk", CTLFLAG_RW,
357 &vap->iv_ampdu_mintraffic[WME_AC_BK], 0,
358 "BK traffic tx aggr threshold (pps)");
359 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
360 "ampdu_mintraffic_be", CTLFLAG_RW,
361 &vap->iv_ampdu_mintraffic[WME_AC_BE], 0,
362 "BE traffic tx aggr threshold (pps)");
363 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
364 "ampdu_mintraffic_vo", CTLFLAG_RW,
365 &vap->iv_ampdu_mintraffic[WME_AC_VO], 0,
366 "VO traffic tx aggr threshold (pps)");
367 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
368 "ampdu_mintraffic_vi", CTLFLAG_RW,
369 &vap->iv_ampdu_mintraffic[WME_AC_VI], 0,
370 "VI traffic tx aggr threshold (pps)");
372 if (vap->iv_caps & IEEE80211_C_DFS) {
373 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
374 "radar", CTLTYPE_INT | CTLFLAG_RW, vap->iv_ic, 0,
375 ieee80211_sysctl_radar, "I", "simulate radar event");
377 vap->iv_sysctl = ctx;
382 ieee80211_sysctl_vdetach(struct ieee80211vap *vap)
385 if (vap->iv_sysctl != NULL) {
386 sysctl_ctx_free(vap->iv_sysctl);
387 kfree(vap->iv_sysctl, M_DEVBUF);
388 vap->iv_sysctl = NULL;
393 ieee80211_node_dectestref(struct ieee80211_node *ni)
395 /* XXX need equivalent of atomic_dec_and_test */
396 atomic_subtract_int(&ni->ni_refcnt, 1);
397 return atomic_cmpset_int(&ni->ni_refcnt, 0, 1);
401 ieee80211_drain_ifq(struct ifqueue *ifq)
403 struct ieee80211_node *ni;
406 wlan_assert_serialized();
412 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
413 KASSERT(ni != NULL, ("frame w/o node"));
414 ieee80211_free_node(ni);
415 m->m_pkthdr.rcvif = NULL;
422 ieee80211_flush_ifq(struct ifqueue *ifq, struct ieee80211vap *vap)
424 struct ieee80211_node *ni;
425 struct mbuf *m, **mprev;
427 wlan_assert_serialized();
428 mprev = &ifq->ifq_head;
429 while ((m = *mprev) != NULL) {
430 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
431 if (ni != NULL && ni->ni_vap == vap) {
432 *mprev = m->m_nextpkt; /* remove from list */
436 ieee80211_free_node(ni); /* reclaim ref */
438 mprev = &m->m_nextpkt;
440 /* recalculate tail ptr */
442 for (; m != NULL && m->m_nextpkt != NULL; m = m->m_nextpkt)
448 * As above, for mbufs allocated with m_gethdr/MGETHDR
449 * or initialized by M_COPY_PKTHDR.
451 #define MC_ALIGN(m, len) \
453 (m)->m_data += (MCLBYTES - (len)) &~ (sizeof(long) - 1); \
454 } while (/* CONSTCOND */ 0)
457 * Allocate and setup a management frame of the specified
458 * size. We return the mbuf and a pointer to the start
459 * of the contiguous data area that's been reserved based
460 * on the packet length. The data area is forced to 32-bit
461 * alignment and the buffer length to a multiple of 4 bytes.
462 * This is done mainly so beacon frames (that require this)
463 * can use this interface too.
466 ieee80211_getmgtframe(uint8_t **frm, int headroom, int pktlen)
472 * NB: we know the mbuf routines will align the data area
473 * so we don't need to do anything special.
475 len = roundup2(headroom + pktlen, 4);
476 KASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len));
477 if (len < MINCLSIZE) {
478 m = m_gethdr(MB_DONTWAIT, MT_DATA);
480 * Align the data in case additional headers are added.
481 * This should only happen when a WEP header is added
482 * which only happens for shared key authentication mgt
483 * frames which all fit in MHLEN.
488 m = m_getcl(MB_DONTWAIT, MT_DATA, M_PKTHDR);
493 m->m_data += headroom;
500 * Re-align the payload in the mbuf. This is mainly used (right now)
501 * to handle IP header alignment requirements on certain architectures.
504 ieee80211_realign(struct ieee80211vap *vap, struct mbuf *m, size_t align)
507 struct mbuf *n = NULL;
509 pktlen = m->m_pkthdr.len;
510 space = pktlen + align;
511 if (space < MINCLSIZE)
512 n = m_gethdr(MB_DONTWAIT, MT_DATA);
515 n = m_getjcl(MB_DONTWAIT, MT_DATA, M_PKTHDR,
516 space <= MCLBYTES ? MCLBYTES :
517 #if MJUMPAGESIZE != MCLBYTES
518 space <= MJUMPAGESIZE ? MJUMPAGESIZE :
520 space <= MJUM9BYTES ? MJUM9BYTES : MJUM16BYTES);
523 if (__predict_true(n != NULL)) {
525 n->m_data = (caddr_t)(ALIGN(n->m_data + align) - align);
526 m_copydata(m, 0, pktlen, mtod(n, caddr_t));
529 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
530 mtod(m, const struct ieee80211_frame *), NULL,
531 "%s", "no mbuf to realign");
532 vap->iv_stats.is_rx_badalign++;
539 ieee80211_add_callback(struct mbuf *m,
540 void (*func)(struct ieee80211_node *, void *, int), void *arg)
543 struct ieee80211_cb *cb;
545 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_CALLBACK,
546 sizeof(struct ieee80211_cb), M_INTWAIT);
550 cb = (struct ieee80211_cb *)(mtag+1);
553 m_tag_prepend(m, mtag);
554 m->m_flags |= M_TXCB;
559 ieee80211_process_callback(struct ieee80211_node *ni,
560 struct mbuf *m, int status)
564 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, NULL);
566 struct ieee80211_cb *cb = (struct ieee80211_cb *)(mtag+1);
567 cb->func(ni, cb->arg, status);
571 #include <sys/libkern.h>
574 get_random_bytes(void *p, size_t n)
579 uint32_t v = karc4random();
580 size_t nb = n > sizeof(uint32_t) ? sizeof(uint32_t) : n;
581 bcopy(&v, dp, n > sizeof(uint32_t) ? sizeof(uint32_t) : n);
582 dp += sizeof(uint32_t), n -= nb;
587 * Helper function for events that pass just a single mac address.
590 notify_macaddr(struct ifnet *ifp, int op, const uint8_t mac[IEEE80211_ADDR_LEN])
592 struct ieee80211_join_event iev;
594 memset(&iev, 0, sizeof(iev));
595 IEEE80211_ADDR_COPY(iev.iev_addr, mac);
596 rt_ieee80211msg(ifp, op, &iev, sizeof(iev));
600 ieee80211_notify_node_join(struct ieee80211_node *ni, int newassoc)
602 struct ieee80211vap *vap = ni->ni_vap;
603 struct ifnet *ifp = vap->iv_ifp;
605 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode join",
606 (ni == vap->iv_bss) ? "bss " : "");
608 if (ni == vap->iv_bss) {
609 notify_macaddr(ifp, newassoc ?
610 RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC, ni->ni_bssid);
611 if_link_state_change(ifp);
613 notify_macaddr(ifp, newassoc ?
614 RTM_IEEE80211_JOIN : RTM_IEEE80211_REJOIN, ni->ni_macaddr);
619 ieee80211_notify_node_leave(struct ieee80211_node *ni)
621 struct ieee80211vap *vap = ni->ni_vap;
622 struct ifnet *ifp = vap->iv_ifp;
624 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode leave",
625 (ni == vap->iv_bss) ? "bss " : "");
627 if (ni == vap->iv_bss) {
628 rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0);
629 if_link_state_change(ifp);
631 /* fire off wireless event station leaving */
632 notify_macaddr(ifp, RTM_IEEE80211_LEAVE, ni->ni_macaddr);
637 ieee80211_notify_scan_done(struct ieee80211vap *vap)
639 struct ifnet *ifp = vap->iv_ifp;
641 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s\n", "notify scan done");
643 /* dispatch wireless event indicating scan completed */
644 rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0);
648 ieee80211_notify_replay_failure(struct ieee80211vap *vap,
649 const struct ieee80211_frame *wh, const struct ieee80211_key *k,
650 u_int64_t rsc, int tid)
652 struct ifnet *ifp = vap->iv_ifp;
654 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2,
655 "%s replay detected <rsc %ju, csc %ju, keyix %u rxkeyix %u>",
656 k->wk_cipher->ic_name, (intmax_t) rsc,
657 (intmax_t) k->wk_keyrsc[tid],
658 k->wk_keyix, k->wk_rxkeyix);
660 if (ifp != NULL) { /* NB: for cipher test modules */
661 struct ieee80211_replay_event iev;
663 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1);
664 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2);
665 iev.iev_cipher = k->wk_cipher->ic_cipher;
666 if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE)
667 iev.iev_keyix = k->wk_rxkeyix;
669 iev.iev_keyix = k->wk_keyix;
670 iev.iev_keyrsc = k->wk_keyrsc[tid];
672 rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev));
677 ieee80211_notify_michael_failure(struct ieee80211vap *vap,
678 const struct ieee80211_frame *wh, u_int keyix)
680 struct ifnet *ifp = vap->iv_ifp;
682 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2,
683 "michael MIC verification failed <keyix %u>", keyix);
684 vap->iv_stats.is_rx_tkipmic++;
686 if (ifp != NULL) { /* NB: for cipher test modules */
687 struct ieee80211_michael_event iev;
689 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1);
690 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2);
691 iev.iev_cipher = IEEE80211_CIPHER_TKIP;
692 iev.iev_keyix = keyix;
693 rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev));
698 ieee80211_notify_wds_discover(struct ieee80211_node *ni)
700 struct ieee80211vap *vap = ni->ni_vap;
701 struct ifnet *ifp = vap->iv_ifp;
703 notify_macaddr(ifp, RTM_IEEE80211_WDS, ni->ni_macaddr);
707 ieee80211_notify_csa(struct ieee80211com *ic,
708 const struct ieee80211_channel *c, int mode, int count)
710 struct ifnet *ifp = ic->ic_ifp;
711 struct ieee80211_csa_event iev;
713 memset(&iev, 0, sizeof(iev));
714 iev.iev_flags = c->ic_flags;
715 iev.iev_freq = c->ic_freq;
716 iev.iev_ieee = c->ic_ieee;
718 iev.iev_count = count;
719 rt_ieee80211msg(ifp, RTM_IEEE80211_CSA, &iev, sizeof(iev));
723 ieee80211_notify_radar(struct ieee80211com *ic,
724 const struct ieee80211_channel *c)
726 struct ifnet *ifp = ic->ic_ifp;
727 struct ieee80211_radar_event iev;
729 memset(&iev, 0, sizeof(iev));
730 iev.iev_flags = c->ic_flags;
731 iev.iev_freq = c->ic_freq;
732 iev.iev_ieee = c->ic_ieee;
733 rt_ieee80211msg(ifp, RTM_IEEE80211_RADAR, &iev, sizeof(iev));
737 ieee80211_notify_cac(struct ieee80211com *ic,
738 const struct ieee80211_channel *c, enum ieee80211_notify_cac_event type)
740 struct ifnet *ifp = ic->ic_ifp;
741 struct ieee80211_cac_event iev;
743 memset(&iev, 0, sizeof(iev));
744 iev.iev_flags = c->ic_flags;
745 iev.iev_freq = c->ic_freq;
746 iev.iev_ieee = c->ic_ieee;
748 rt_ieee80211msg(ifp, RTM_IEEE80211_CAC, &iev, sizeof(iev));
752 ieee80211_notify_node_deauth(struct ieee80211_node *ni)
754 struct ieee80211vap *vap = ni->ni_vap;
755 struct ifnet *ifp = vap->iv_ifp;
757 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node deauth");
759 notify_macaddr(ifp, RTM_IEEE80211_DEAUTH, ni->ni_macaddr);
763 ieee80211_notify_node_auth(struct ieee80211_node *ni)
765 struct ieee80211vap *vap = ni->ni_vap;
766 struct ifnet *ifp = vap->iv_ifp;
768 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node auth");
770 notify_macaddr(ifp, RTM_IEEE80211_AUTH, ni->ni_macaddr);
774 ieee80211_notify_country(struct ieee80211vap *vap,
775 const uint8_t bssid[IEEE80211_ADDR_LEN], const uint8_t cc[2])
777 struct ifnet *ifp = vap->iv_ifp;
778 struct ieee80211_country_event iev;
780 memset(&iev, 0, sizeof(iev));
781 IEEE80211_ADDR_COPY(iev.iev_addr, bssid);
782 iev.iev_cc[0] = cc[0];
783 iev.iev_cc[1] = cc[1];
784 rt_ieee80211msg(ifp, RTM_IEEE80211_COUNTRY, &iev, sizeof(iev));
788 ieee80211_notify_radio(struct ieee80211com *ic, int state)
790 struct ifnet *ifp = ic->ic_ifp;
791 struct ieee80211_radio_event iev;
793 memset(&iev, 0, sizeof(iev));
794 iev.iev_state = state;
795 rt_ieee80211msg(ifp, RTM_IEEE80211_RADIO, &iev, sizeof(iev));
799 ieee80211_handoff(struct ifnet *dst_ifp, struct mbuf *m)
803 /* We may be sending a fragment so traverse the mbuf */
805 struct altq_pktattr pktattr;
810 if (ifq_is_enabled(&dst_ifp->if_snd))
811 altq_etherclassify(&dst_ifp->if_snd, m, &pktattr);
813 ifq_dispatch(dst_ifp, m, &pktattr);
819 /* IEEE Std 802.11a-1999, page 9, table 79 */
820 #define IEEE80211_OFDM_SYM_TIME 4
821 #define IEEE80211_OFDM_PREAMBLE_TIME 16
822 #define IEEE80211_OFDM_SIGNAL_TIME 4
823 /* IEEE Std 802.11g-2003, page 44 */
824 #define IEEE80211_OFDM_SIGNAL_EXT_TIME 6
826 /* IEEE Std 802.11a-1999, page 7, figure 107 */
827 #define IEEE80211_OFDM_PLCP_SERVICE_NBITS 16
828 #define IEEE80211_OFDM_TAIL_NBITS 6
830 #define IEEE80211_OFDM_NBITS(frmlen) \
831 (IEEE80211_OFDM_PLCP_SERVICE_NBITS + \
832 ((frmlen) * NBBY) + \
833 IEEE80211_OFDM_TAIL_NBITS)
835 #define IEEE80211_OFDM_NBITS_PER_SYM(kbps) \
836 (((kbps) * IEEE80211_OFDM_SYM_TIME) / 1000)
838 #define IEEE80211_OFDM_NSYMS(kbps, frmlen) \
839 howmany(IEEE80211_OFDM_NBITS((frmlen)), \
840 IEEE80211_OFDM_NBITS_PER_SYM((kbps)))
842 #define IEEE80211_OFDM_TXTIME(kbps, frmlen) \
843 (IEEE80211_OFDM_PREAMBLE_TIME + \
844 IEEE80211_OFDM_SIGNAL_TIME + \
845 (IEEE80211_OFDM_NSYMS((kbps), (frmlen)) * IEEE80211_OFDM_SYM_TIME))
847 /* IEEE Std 802.11b-1999, page 28, subclause 18.3.4 */
848 #define IEEE80211_CCK_PREAMBLE_LEN 144
849 #define IEEE80211_CCK_PLCP_HDR_TIME 48
850 #define IEEE80211_CCK_SHPREAMBLE_LEN 72
851 #define IEEE80211_CCK_SHPLCP_HDR_TIME 24
853 #define IEEE80211_CCK_NBITS(frmlen) ((frmlen) * NBBY)
854 #define IEEE80211_CCK_TXTIME(kbps, frmlen) \
855 (((IEEE80211_CCK_NBITS((frmlen)) * 1000) + (kbps) - 1) / (kbps))
858 ieee80211_txtime(struct ieee80211_node *ni, u_int len, uint8_t rs_rate,
861 struct ieee80211vap *vap = ni->ni_vap;
865 rs_rate &= IEEE80211_RATE_VAL;
866 rate = rs_rate * 500; /* ieee80211 rate -> kbps */
868 if (vap->iv_ic->ic_phytype == IEEE80211_T_OFDM) {
870 * IEEE Std 802.11a-1999, page 37, equation (29)
871 * IEEE Std 802.11g-2003, page 44, equation (42)
873 txtime = IEEE80211_OFDM_TXTIME(rate, len);
874 if (vap->iv_ic->ic_curmode == IEEE80211_MODE_11G)
875 txtime += IEEE80211_OFDM_SIGNAL_EXT_TIME;
878 * IEEE Std 802.11b-1999, page 28, subclause 18.3.4
879 * IEEE Std 802.11g-2003, page 45, equation (43)
881 if (vap->iv_ic->ic_phytype == IEEE80211_T_OFDM_QUARTER+1)
883 txtime = IEEE80211_CCK_TXTIME(rate, len);
886 * Short preamble is not applicable for DS 1Mbits/s
888 if (rs_rate != 2 && (flags & IEEE80211_F_SHPREAMBLE)) {
889 txtime += IEEE80211_CCK_SHPREAMBLE_LEN +
890 IEEE80211_CCK_SHPLCP_HDR_TIME;
892 txtime += IEEE80211_CCK_PREAMBLE_LEN +
893 IEEE80211_CCK_PLCP_HDR_TIME;
900 ieee80211_load_module(const char *modname)
904 (void)kern_kldload(curthread, modname, NULL);
906 kprintf("%s: load the %s module by hand for now.\n", __func__, modname);
910 static eventhandler_tag wlan_bpfevent;
911 static eventhandler_tag wlan_ifllevent;
914 bpf_track_event(void *arg, struct ifnet *ifp, int dlt, int attach)
916 /* NB: identify vap's by if_start */
918 wlan_serialize_enter();
919 if (dlt == DLT_IEEE802_11_RADIO && ifp->if_start == ieee80211_start) {
920 struct ieee80211vap *vap = ifp->if_softc;
922 * Track bpf radiotap listener state. We mark the vap
923 * to indicate if any listener is present and the com
924 * to indicate if any listener exists on any associated
925 * vap. This flag is used by drivers to prepare radiotap
926 * state only when needed.
929 ieee80211_syncflag_ext(vap, IEEE80211_FEXT_BPF);
930 if (vap->iv_opmode == IEEE80211_M_MONITOR)
931 atomic_add_int(&vap->iv_ic->ic_montaps, 1);
932 } else if (!vap->iv_rawbpf) {
933 ieee80211_syncflag_ext(vap, -IEEE80211_FEXT_BPF);
934 if (vap->iv_opmode == IEEE80211_M_MONITOR)
935 atomic_subtract_int(&vap->iv_ic->ic_montaps, 1);
938 wlan_serialize_exit();
942 wlan_iflladdr_event(void *arg __unused, struct ifnet *ifp)
944 struct ieee80211com *ic = ifp->if_l2com;
945 struct ieee80211vap *vap, *next;
947 wlan_serialize_enter();
948 if (ifp->if_type != IFT_IEEE80211 || ic == NULL) {
949 wlan_serialize_exit();
953 TAILQ_FOREACH_MUTABLE(vap, &ic->ic_vaps, iv_next, next) {
955 * If the MAC address has changed on the parent and it was
956 * copied to the vap on creation then re-sync.
958 if (vap->iv_ic == ic &&
959 (vap->iv_flags_ext & IEEE80211_FEXT_UNIQMAC) == 0) {
960 IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp));
961 wlan_serialize_exit();
962 if_setlladdr(vap->iv_ifp, IF_LLADDR(ifp),
964 wlan_serialize_enter();
967 wlan_serialize_exit();
973 * NB: the module name is "wlan" for compatibility with NetBSD.
976 wlan_modevent(module_t mod, int type, void *unused)
980 wlan_serialize_enter();
985 kprintf("wlan: <802.11 Link Layer>\n");
986 wlan_bpfevent = EVENTHANDLER_REGISTER(bpf_track,
988 EVENTHANDLER_PRI_ANY);
989 if (wlan_bpfevent == NULL) {
993 wlan_ifllevent = EVENTHANDLER_REGISTER(iflladdr_event,
994 wlan_iflladdr_event, NULL,
995 EVENTHANDLER_PRI_ANY);
996 if (wlan_ifllevent == NULL) {
997 EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent);
1001 if_clone_attach(&wlan_cloner);
1002 if_register_com_alloc(IFT_IEEE80211, wlan_alloc, wlan_free);
1006 if_deregister_com_alloc(IFT_IEEE80211);
1007 if_clone_detach(&wlan_cloner);
1008 EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent);
1009 EVENTHANDLER_DEREGISTER(iflladdr_event, wlan_ifllevent);
1016 wlan_serialize_exit();
1021 static moduledata_t wlan_mod = {
1026 DECLARE_MODULE(wlan, wlan_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
1027 MODULE_VERSION(wlan, 1);
1028 MODULE_DEPEND(wlan, ether, 1, 1, 1);