2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2003-2009 Sam Leffler, Errno Consulting
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
32 * IEEE 802.11 support (FreeBSD-specific code)
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/eventhandler.h>
39 #include <sys/kernel.h>
40 #include <sys/linker.h>
41 #include <sys/malloc.h>
43 #include <sys/module.h>
46 #include <sys/sysctl.h>
48 #include <sys/socket.h>
51 #include <net/debugnet.h>
53 #include <net/if_var.h>
54 #include <net/if_dl.h>
55 #include <net/if_clone.h>
56 #include <net/if_media.h>
57 #include <net/if_types.h>
58 #include <net/ethernet.h>
59 #include <net/route.h>
62 #include <net80211/ieee80211_var.h>
63 #include <net80211/ieee80211_input.h>
65 DEBUGNET_DEFINE(ieee80211);
66 SYSCTL_NODE(_net, OID_AUTO, wlan, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
67 "IEEE 80211 parameters");
69 #ifdef IEEE80211_DEBUG
70 static int ieee80211_debug = 0;
71 SYSCTL_INT(_net_wlan, OID_AUTO, debug, CTLFLAG_RW, &ieee80211_debug,
72 0, "debugging printfs");
75 static const char wlanname[] = "wlan";
76 static struct if_clone *wlan_cloner;
79 * priv(9) NET80211 checks.
80 * Return 0 if operation is allowed, E* (usually EPERM) otherwise.
83 ieee80211_priv_check_vap_getkey(u_long cmd __unused,
84 struct ieee80211vap *vap __unused, struct ifnet *ifp __unused)
87 return (priv_check(curthread, PRIV_NET80211_VAP_GETKEY));
91 ieee80211_priv_check_vap_manage(u_long cmd __unused,
92 struct ieee80211vap *vap __unused, struct ifnet *ifp __unused)
95 return (priv_check(curthread, PRIV_NET80211_VAP_MANAGE));
99 ieee80211_priv_check_vap_setmac(u_long cmd __unused,
100 struct ieee80211vap *vap __unused, struct ifnet *ifp __unused)
103 return (priv_check(curthread, PRIV_NET80211_VAP_SETMAC));
107 ieee80211_priv_check_create_vap(u_long cmd __unused,
108 struct ieee80211vap *vap __unused, struct ifnet *ifp __unused)
111 return (priv_check(curthread, PRIV_NET80211_CREATE_VAP));
115 wlan_clone_create(struct if_clone *ifc, int unit, caddr_t params)
117 struct ieee80211_clone_params cp;
118 struct ieee80211vap *vap;
119 struct ieee80211com *ic;
122 error = ieee80211_priv_check_create_vap(0, NULL, NULL);
126 error = copyin(params, &cp, sizeof(cp));
129 ic = ieee80211_find_com(cp.icp_parent);
132 if (cp.icp_opmode >= IEEE80211_OPMODE_MAX) {
133 ic_printf(ic, "%s: invalid opmode %d\n", __func__,
137 if ((ic->ic_caps & ieee80211_opcap[cp.icp_opmode]) == 0) {
138 ic_printf(ic, "%s mode not supported\n",
139 ieee80211_opmode_name[cp.icp_opmode]);
142 if ((cp.icp_flags & IEEE80211_CLONE_TDMA) &&
143 #ifdef IEEE80211_SUPPORT_TDMA
144 (ic->ic_caps & IEEE80211_C_TDMA) == 0
149 ic_printf(ic, "TDMA not supported\n");
152 vap = ic->ic_vap_create(ic, wlanname, unit,
153 cp.icp_opmode, cp.icp_flags, cp.icp_bssid,
154 cp.icp_flags & IEEE80211_CLONE_MACADDR ?
155 cp.icp_macaddr : ic->ic_macaddr);
161 if (ic->ic_debugnet_meth != NULL)
162 DEBUGNET_SET(vap->iv_ifp, ieee80211);
168 wlan_clone_destroy(struct ifnet *ifp)
170 struct ieee80211vap *vap = ifp->if_softc;
171 struct ieee80211com *ic = vap->iv_ic;
173 ic->ic_vap_delete(vap);
177 ieee80211_vap_destroy(struct ieee80211vap *vap)
179 CURVNET_SET(vap->iv_ifp->if_vnet);
180 if_clone_destroyif(wlan_cloner, vap->iv_ifp);
185 ieee80211_sysctl_msecs_ticks(SYSCTL_HANDLER_ARGS)
187 int msecs = ticks_to_msecs(*(int *)arg1);
190 error = sysctl_handle_int(oidp, &msecs, 0, req);
191 if (error || !req->newptr)
193 *(int *)arg1 = msecs_to_ticks(msecs);
198 ieee80211_sysctl_inact(SYSCTL_HANDLER_ARGS)
200 int inact = (*(int *)arg1) * IEEE80211_INACT_WAIT;
203 error = sysctl_handle_int(oidp, &inact, 0, req);
204 if (error || !req->newptr)
206 *(int *)arg1 = inact / IEEE80211_INACT_WAIT;
211 ieee80211_sysctl_parent(SYSCTL_HANDLER_ARGS)
213 struct ieee80211com *ic = arg1;
215 return SYSCTL_OUT_STR(req, ic->ic_name);
219 ieee80211_sysctl_radar(SYSCTL_HANDLER_ARGS)
221 struct ieee80211com *ic = arg1;
224 error = sysctl_handle_int(oidp, &t, 0, req);
225 if (error || !req->newptr)
228 ieee80211_dfs_notify_radar(ic, ic->ic_curchan);
229 IEEE80211_UNLOCK(ic);
234 * For now, just restart everything.
236 * Later on, it'd be nice to have a separate VAP restart to
237 * full-device restart.
240 ieee80211_sysctl_vap_restart(SYSCTL_HANDLER_ARGS)
242 struct ieee80211vap *vap = arg1;
245 error = sysctl_handle_int(oidp, &t, 0, req);
246 if (error || !req->newptr)
249 ieee80211_restart_all(vap->iv_ic);
254 ieee80211_sysctl_attach(struct ieee80211com *ic)
259 ieee80211_sysctl_detach(struct ieee80211com *ic)
264 ieee80211_sysctl_vattach(struct ieee80211vap *vap)
266 struct ifnet *ifp = vap->iv_ifp;
267 struct sysctl_ctx_list *ctx;
268 struct sysctl_oid *oid;
269 char num[14]; /* sufficient for 32 bits */
271 ctx = (struct sysctl_ctx_list *) IEEE80211_MALLOC(sizeof(struct sysctl_ctx_list),
272 M_DEVBUF, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
274 if_printf(ifp, "%s: cannot allocate sysctl context!\n",
278 sysctl_ctx_init(ctx);
279 snprintf(num, sizeof(num), "%u", ifp->if_dunit);
280 oid = SYSCTL_ADD_NODE(ctx, &SYSCTL_NODE_CHILDREN(_net, wlan),
281 OID_AUTO, num, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "");
282 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
283 "%parent", CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT,
284 vap->iv_ic, 0, ieee80211_sysctl_parent, "A", "parent device");
285 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
286 "driver_caps", CTLFLAG_RW, &vap->iv_caps, 0,
287 "driver capabilities");
288 #ifdef IEEE80211_DEBUG
289 vap->iv_debug = ieee80211_debug;
290 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
291 "debug", CTLFLAG_RW, &vap->iv_debug, 0,
292 "control debugging printfs");
294 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
295 "bmiss_max", CTLFLAG_RW, &vap->iv_bmiss_max, 0,
296 "consecutive beacon misses before scanning");
297 /* XXX inherit from tunables */
298 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
299 "inact_run", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
300 &vap->iv_inact_run, 0, ieee80211_sysctl_inact, "I",
301 "station inactivity timeout (sec)");
302 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
303 "inact_probe", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
304 &vap->iv_inact_probe, 0, ieee80211_sysctl_inact, "I",
305 "station inactivity probe timeout (sec)");
306 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
307 "inact_auth", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
308 &vap->iv_inact_auth, 0, ieee80211_sysctl_inact, "I",
309 "station authentication timeout (sec)");
310 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
311 "inact_init", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
312 &vap->iv_inact_init, 0, ieee80211_sysctl_inact, "I",
313 "station initial state timeout (sec)");
314 if (vap->iv_htcaps & IEEE80211_HTC_HT) {
315 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
316 "ampdu_mintraffic_bk", CTLFLAG_RW,
317 &vap->iv_ampdu_mintraffic[WME_AC_BK], 0,
318 "BK traffic tx aggr threshold (pps)");
319 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
320 "ampdu_mintraffic_be", CTLFLAG_RW,
321 &vap->iv_ampdu_mintraffic[WME_AC_BE], 0,
322 "BE traffic tx aggr threshold (pps)");
323 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
324 "ampdu_mintraffic_vo", CTLFLAG_RW,
325 &vap->iv_ampdu_mintraffic[WME_AC_VO], 0,
326 "VO traffic tx aggr threshold (pps)");
327 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
328 "ampdu_mintraffic_vi", CTLFLAG_RW,
329 &vap->iv_ampdu_mintraffic[WME_AC_VI], 0,
330 "VI traffic tx aggr threshold (pps)");
333 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
334 "force_restart", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
335 vap, 0, ieee80211_sysctl_vap_restart, "I", "force a VAP restart");
337 if (vap->iv_caps & IEEE80211_C_DFS) {
338 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
339 "radar", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
340 vap->iv_ic, 0, ieee80211_sysctl_radar, "I",
341 "simulate radar event");
343 vap->iv_sysctl = ctx;
348 ieee80211_sysctl_vdetach(struct ieee80211vap *vap)
351 if (vap->iv_sysctl != NULL) {
352 sysctl_ctx_free(vap->iv_sysctl);
353 IEEE80211_FREE(vap->iv_sysctl, M_DEVBUF);
354 vap->iv_sysctl = NULL;
359 ieee80211_com_vincref(struct ieee80211vap *vap)
363 ostate = atomic_fetchadd_32(&vap->iv_com_state, IEEE80211_COM_REF_ADD);
365 if (ostate & IEEE80211_COM_DETACHED) {
366 atomic_subtract_32(&vap->iv_com_state, IEEE80211_COM_REF_ADD);
370 if (_IEEE80211_MASKSHIFT(ostate, IEEE80211_COM_REF) ==
371 IEEE80211_COM_REF_MAX) {
372 atomic_subtract_32(&vap->iv_com_state, IEEE80211_COM_REF_ADD);
380 ieee80211_com_vdecref(struct ieee80211vap *vap)
384 ostate = atomic_fetchadd_32(&vap->iv_com_state, -IEEE80211_COM_REF_ADD);
386 KASSERT(_IEEE80211_MASKSHIFT(ostate, IEEE80211_COM_REF) != 0,
387 ("com reference counter underflow"));
393 ieee80211_com_vdetach(struct ieee80211vap *vap)
397 sleep_time = msecs_to_ticks(250);
398 atomic_set_32(&vap->iv_com_state, IEEE80211_COM_DETACHED);
399 while (_IEEE80211_MASKSHIFT(atomic_load_32(&vap->iv_com_state),
400 IEEE80211_COM_REF) != 0)
401 pause("comref", sleep_time);
405 ieee80211_node_dectestref(struct ieee80211_node *ni)
407 /* XXX need equivalent of atomic_dec_and_test */
408 atomic_subtract_int(&ni->ni_refcnt, 1);
409 return atomic_cmpset_int(&ni->ni_refcnt, 0, 1);
413 ieee80211_drain_ifq(struct ifqueue *ifq)
415 struct ieee80211_node *ni;
423 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
424 KASSERT(ni != NULL, ("frame w/o node"));
425 ieee80211_free_node(ni);
426 m->m_pkthdr.rcvif = NULL;
433 ieee80211_flush_ifq(struct ifqueue *ifq, struct ieee80211vap *vap)
435 struct ieee80211_node *ni;
436 struct mbuf *m, **mprev;
439 mprev = &ifq->ifq_head;
440 while ((m = *mprev) != NULL) {
441 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
442 if (ni != NULL && ni->ni_vap == vap) {
443 *mprev = m->m_nextpkt; /* remove from list */
447 ieee80211_free_node(ni); /* reclaim ref */
449 mprev = &m->m_nextpkt;
451 /* recalculate tail ptr */
453 for (; m != NULL && m->m_nextpkt != NULL; m = m->m_nextpkt)
460 * As above, for mbufs allocated with m_gethdr/MGETHDR
461 * or initialized by M_COPY_PKTHDR.
463 #define MC_ALIGN(m, len) \
465 (m)->m_data += rounddown2(MCLBYTES - (len), sizeof(long)); \
466 } while (/* CONSTCOND */ 0)
469 * Allocate and setup a management frame of the specified
470 * size. We return the mbuf and a pointer to the start
471 * of the contiguous data area that's been reserved based
472 * on the packet length. The data area is forced to 32-bit
473 * alignment and the buffer length to a multiple of 4 bytes.
474 * This is done mainly so beacon frames (that require this)
475 * can use this interface too.
478 ieee80211_getmgtframe(uint8_t **frm, int headroom, int pktlen)
484 * NB: we know the mbuf routines will align the data area
485 * so we don't need to do anything special.
487 len = roundup2(headroom + pktlen, 4);
488 KASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len));
489 if (len < MINCLSIZE) {
490 m = m_gethdr(M_NOWAIT, MT_DATA);
492 * Align the data in case additional headers are added.
493 * This should only happen when a WEP header is added
494 * which only happens for shared key authentication mgt
495 * frames which all fit in MHLEN.
500 m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
505 m->m_data += headroom;
511 #ifndef __NO_STRICT_ALIGNMENT
513 * Re-align the payload in the mbuf. This is mainly used (right now)
514 * to handle IP header alignment requirements on certain architectures.
517 ieee80211_realign(struct ieee80211vap *vap, struct mbuf *m, size_t align)
522 pktlen = m->m_pkthdr.len;
523 space = pktlen + align;
524 if (space < MINCLSIZE)
525 n = m_gethdr(M_NOWAIT, MT_DATA);
527 n = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR,
528 space <= MCLBYTES ? MCLBYTES :
529 #if MJUMPAGESIZE != MCLBYTES
530 space <= MJUMPAGESIZE ? MJUMPAGESIZE :
532 space <= MJUM9BYTES ? MJUM9BYTES : MJUM16BYTES);
534 if (__predict_true(n != NULL)) {
536 n->m_data = (caddr_t)(ALIGN(n->m_data + align) - align);
537 m_copydata(m, 0, pktlen, mtod(n, caddr_t));
540 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
541 mtod(m, const struct ieee80211_frame *), NULL,
542 "%s", "no mbuf to realign");
543 vap->iv_stats.is_rx_badalign++;
548 #endif /* !__NO_STRICT_ALIGNMENT */
551 ieee80211_add_callback(struct mbuf *m,
552 void (*func)(struct ieee80211_node *, void *, int), void *arg)
555 struct ieee80211_cb *cb;
557 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_CALLBACK,
558 sizeof(struct ieee80211_cb), M_NOWAIT);
562 cb = (struct ieee80211_cb *)(mtag+1);
565 m_tag_prepend(m, mtag);
566 m->m_flags |= M_TXCB;
571 ieee80211_add_xmit_params(struct mbuf *m,
572 const struct ieee80211_bpf_params *params)
575 struct ieee80211_tx_params *tx;
577 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_XMIT_PARAMS,
578 sizeof(struct ieee80211_tx_params), M_NOWAIT);
582 tx = (struct ieee80211_tx_params *)(mtag+1);
583 memcpy(&tx->params, params, sizeof(struct ieee80211_bpf_params));
584 m_tag_prepend(m, mtag);
589 ieee80211_get_xmit_params(struct mbuf *m,
590 struct ieee80211_bpf_params *params)
593 struct ieee80211_tx_params *tx;
595 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_XMIT_PARAMS,
599 tx = (struct ieee80211_tx_params *)(mtag + 1);
600 memcpy(params, &tx->params, sizeof(struct ieee80211_bpf_params));
605 ieee80211_process_callback(struct ieee80211_node *ni,
606 struct mbuf *m, int status)
610 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, NULL);
612 struct ieee80211_cb *cb = (struct ieee80211_cb *)(mtag+1);
613 cb->func(ni, cb->arg, status);
618 * Add RX parameters to the given mbuf.
620 * Returns 1 if OK, 0 on error.
623 ieee80211_add_rx_params(struct mbuf *m, const struct ieee80211_rx_stats *rxs)
626 struct ieee80211_rx_params *rx;
628 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_RECV_PARAMS,
629 sizeof(struct ieee80211_rx_stats), M_NOWAIT);
633 rx = (struct ieee80211_rx_params *)(mtag + 1);
634 memcpy(&rx->params, rxs, sizeof(*rxs));
635 m_tag_prepend(m, mtag);
640 ieee80211_get_rx_params(struct mbuf *m, struct ieee80211_rx_stats *rxs)
643 struct ieee80211_rx_params *rx;
645 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_RECV_PARAMS,
649 rx = (struct ieee80211_rx_params *)(mtag + 1);
650 memcpy(rxs, &rx->params, sizeof(*rxs));
654 const struct ieee80211_rx_stats *
655 ieee80211_get_rx_params_ptr(struct mbuf *m)
658 struct ieee80211_rx_params *rx;
660 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_RECV_PARAMS,
664 rx = (struct ieee80211_rx_params *)(mtag + 1);
665 return (&rx->params);
669 * Add TOA parameters to the given mbuf.
672 ieee80211_add_toa_params(struct mbuf *m, const struct ieee80211_toa_params *p)
675 struct ieee80211_toa_params *rp;
677 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_TOA_PARAMS,
678 sizeof(struct ieee80211_toa_params), M_NOWAIT);
682 rp = (struct ieee80211_toa_params *)(mtag + 1);
683 memcpy(rp, p, sizeof(*rp));
684 m_tag_prepend(m, mtag);
689 ieee80211_get_toa_params(struct mbuf *m, struct ieee80211_toa_params *p)
692 struct ieee80211_toa_params *rp;
694 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_TOA_PARAMS,
698 rp = (struct ieee80211_toa_params *)(mtag + 1);
700 memcpy(p, rp, sizeof(*p));
705 * Transmit a frame to the parent interface.
708 ieee80211_parent_xmitpkt(struct ieee80211com *ic, struct mbuf *m)
713 * Assert the IC TX lock is held - this enforces the
714 * processing -> queuing order is maintained
716 IEEE80211_TX_LOCK_ASSERT(ic);
717 error = ic->ic_transmit(ic, m);
719 struct ieee80211_node *ni;
721 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
723 /* XXX number of fragments */
724 if_inc_counter(ni->ni_vap->iv_ifp, IFCOUNTER_OERRORS, 1);
725 ieee80211_free_node(ni);
726 ieee80211_free_mbuf(m);
732 * Transmit a frame to the VAP interface.
735 ieee80211_vap_xmitpkt(struct ieee80211vap *vap, struct mbuf *m)
737 struct ifnet *ifp = vap->iv_ifp;
740 * When transmitting via the VAP, we shouldn't hold
741 * any IC TX lock as the VAP TX path will acquire it.
743 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
745 return (ifp->if_transmit(ifp, m));
749 #include <sys/libkern.h>
752 get_random_bytes(void *p, size_t n)
757 uint32_t v = arc4random();
758 size_t nb = n > sizeof(uint32_t) ? sizeof(uint32_t) : n;
759 bcopy(&v, dp, n > sizeof(uint32_t) ? sizeof(uint32_t) : n);
760 dp += sizeof(uint32_t), n -= nb;
765 * Helper function for events that pass just a single mac address.
768 notify_macaddr(struct ifnet *ifp, int op, const uint8_t mac[IEEE80211_ADDR_LEN])
770 struct ieee80211_join_event iev;
772 CURVNET_SET(ifp->if_vnet);
773 memset(&iev, 0, sizeof(iev));
774 IEEE80211_ADDR_COPY(iev.iev_addr, mac);
775 rt_ieee80211msg(ifp, op, &iev, sizeof(iev));
780 ieee80211_notify_node_join(struct ieee80211_node *ni, int newassoc)
782 struct ieee80211vap *vap = ni->ni_vap;
783 struct ifnet *ifp = vap->iv_ifp;
785 CURVNET_SET_QUIET(ifp->if_vnet);
786 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode join",
787 (ni == vap->iv_bss) ? "bss " : "");
789 if (ni == vap->iv_bss) {
790 notify_macaddr(ifp, newassoc ?
791 RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC, ni->ni_bssid);
792 if_link_state_change(ifp, LINK_STATE_UP);
794 notify_macaddr(ifp, newassoc ?
795 RTM_IEEE80211_JOIN : RTM_IEEE80211_REJOIN, ni->ni_macaddr);
801 ieee80211_notify_node_leave(struct ieee80211_node *ni)
803 struct ieee80211vap *vap = ni->ni_vap;
804 struct ifnet *ifp = vap->iv_ifp;
806 CURVNET_SET_QUIET(ifp->if_vnet);
807 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode leave",
808 (ni == vap->iv_bss) ? "bss " : "");
810 if (ni == vap->iv_bss) {
811 rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0);
812 if_link_state_change(ifp, LINK_STATE_DOWN);
814 /* fire off wireless event station leaving */
815 notify_macaddr(ifp, RTM_IEEE80211_LEAVE, ni->ni_macaddr);
821 ieee80211_notify_scan_done(struct ieee80211vap *vap)
823 struct ifnet *ifp = vap->iv_ifp;
825 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s\n", "notify scan done");
827 /* dispatch wireless event indicating scan completed */
828 CURVNET_SET(ifp->if_vnet);
829 rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0);
834 ieee80211_notify_replay_failure(struct ieee80211vap *vap,
835 const struct ieee80211_frame *wh, const struct ieee80211_key *k,
836 u_int64_t rsc, int tid)
838 struct ifnet *ifp = vap->iv_ifp;
840 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2,
841 "%s replay detected tid %d <rsc %ju (%jx), csc %ju (%jx), keyix %u rxkeyix %u>",
842 k->wk_cipher->ic_name, tid,
845 (intmax_t) k->wk_keyrsc[tid],
846 (intmax_t) k->wk_keyrsc[tid],
847 k->wk_keyix, k->wk_rxkeyix);
849 if (ifp != NULL) { /* NB: for cipher test modules */
850 struct ieee80211_replay_event iev;
852 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1);
853 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2);
854 iev.iev_cipher = k->wk_cipher->ic_cipher;
855 if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE)
856 iev.iev_keyix = k->wk_rxkeyix;
858 iev.iev_keyix = k->wk_keyix;
859 iev.iev_keyrsc = k->wk_keyrsc[tid];
861 CURVNET_SET(ifp->if_vnet);
862 rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev));
868 ieee80211_notify_michael_failure(struct ieee80211vap *vap,
869 const struct ieee80211_frame *wh, u_int keyix)
871 struct ifnet *ifp = vap->iv_ifp;
873 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2,
874 "michael MIC verification failed <keyix %u>", keyix);
875 vap->iv_stats.is_rx_tkipmic++;
877 if (ifp != NULL) { /* NB: for cipher test modules */
878 struct ieee80211_michael_event iev;
880 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1);
881 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2);
882 iev.iev_cipher = IEEE80211_CIPHER_TKIP;
883 iev.iev_keyix = keyix;
884 CURVNET_SET(ifp->if_vnet);
885 rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev));
891 ieee80211_notify_wds_discover(struct ieee80211_node *ni)
893 struct ieee80211vap *vap = ni->ni_vap;
894 struct ifnet *ifp = vap->iv_ifp;
896 notify_macaddr(ifp, RTM_IEEE80211_WDS, ni->ni_macaddr);
900 ieee80211_notify_csa(struct ieee80211com *ic,
901 const struct ieee80211_channel *c, int mode, int count)
903 struct ieee80211_csa_event iev;
904 struct ieee80211vap *vap;
907 memset(&iev, 0, sizeof(iev));
908 iev.iev_flags = c->ic_flags;
909 iev.iev_freq = c->ic_freq;
910 iev.iev_ieee = c->ic_ieee;
912 iev.iev_count = count;
913 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
915 CURVNET_SET(ifp->if_vnet);
916 rt_ieee80211msg(ifp, RTM_IEEE80211_CSA, &iev, sizeof(iev));
922 ieee80211_notify_radar(struct ieee80211com *ic,
923 const struct ieee80211_channel *c)
925 struct ieee80211_radar_event iev;
926 struct ieee80211vap *vap;
929 memset(&iev, 0, sizeof(iev));
930 iev.iev_flags = c->ic_flags;
931 iev.iev_freq = c->ic_freq;
932 iev.iev_ieee = c->ic_ieee;
933 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
935 CURVNET_SET(ifp->if_vnet);
936 rt_ieee80211msg(ifp, RTM_IEEE80211_RADAR, &iev, sizeof(iev));
942 ieee80211_notify_cac(struct ieee80211com *ic,
943 const struct ieee80211_channel *c, enum ieee80211_notify_cac_event type)
945 struct ieee80211_cac_event iev;
946 struct ieee80211vap *vap;
949 memset(&iev, 0, sizeof(iev));
950 iev.iev_flags = c->ic_flags;
951 iev.iev_freq = c->ic_freq;
952 iev.iev_ieee = c->ic_ieee;
954 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
956 CURVNET_SET(ifp->if_vnet);
957 rt_ieee80211msg(ifp, RTM_IEEE80211_CAC, &iev, sizeof(iev));
963 ieee80211_notify_node_deauth(struct ieee80211_node *ni)
965 struct ieee80211vap *vap = ni->ni_vap;
966 struct ifnet *ifp = vap->iv_ifp;
968 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node deauth");
970 notify_macaddr(ifp, RTM_IEEE80211_DEAUTH, ni->ni_macaddr);
974 ieee80211_notify_node_auth(struct ieee80211_node *ni)
976 struct ieee80211vap *vap = ni->ni_vap;
977 struct ifnet *ifp = vap->iv_ifp;
979 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node auth");
981 notify_macaddr(ifp, RTM_IEEE80211_AUTH, ni->ni_macaddr);
985 ieee80211_notify_country(struct ieee80211vap *vap,
986 const uint8_t bssid[IEEE80211_ADDR_LEN], const uint8_t cc[2])
988 struct ifnet *ifp = vap->iv_ifp;
989 struct ieee80211_country_event iev;
991 memset(&iev, 0, sizeof(iev));
992 IEEE80211_ADDR_COPY(iev.iev_addr, bssid);
993 iev.iev_cc[0] = cc[0];
994 iev.iev_cc[1] = cc[1];
995 CURVNET_SET(ifp->if_vnet);
996 rt_ieee80211msg(ifp, RTM_IEEE80211_COUNTRY, &iev, sizeof(iev));
1001 ieee80211_notify_radio(struct ieee80211com *ic, int state)
1003 struct ieee80211_radio_event iev;
1004 struct ieee80211vap *vap;
1007 memset(&iev, 0, sizeof(iev));
1008 iev.iev_state = state;
1009 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1011 CURVNET_SET(ifp->if_vnet);
1012 rt_ieee80211msg(ifp, RTM_IEEE80211_RADIO, &iev, sizeof(iev));
1018 ieee80211_notify_ifnet_change(struct ieee80211vap *vap)
1020 struct ifnet *ifp = vap->iv_ifp;
1022 IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG, "%s\n",
1023 "interface state change");
1025 CURVNET_SET(ifp->if_vnet);
1031 ieee80211_load_module(const char *modname)
1035 (void)kern_kldload(curthread, modname, NULL);
1037 printf("%s: load the %s module by hand for now.\n", __func__, modname);
1041 static eventhandler_tag wlan_bpfevent;
1042 static eventhandler_tag wlan_ifllevent;
1045 bpf_track(void *arg, struct ifnet *ifp, int dlt, int attach)
1047 /* NB: identify vap's by if_init */
1048 if (dlt == DLT_IEEE802_11_RADIO &&
1049 ifp->if_init == ieee80211_init) {
1050 struct ieee80211vap *vap = ifp->if_softc;
1052 * Track bpf radiotap listener state. We mark the vap
1053 * to indicate if any listener is present and the com
1054 * to indicate if any listener exists on any associated
1055 * vap. This flag is used by drivers to prepare radiotap
1056 * state only when needed.
1059 ieee80211_syncflag_ext(vap, IEEE80211_FEXT_BPF);
1060 if (vap->iv_opmode == IEEE80211_M_MONITOR)
1061 atomic_add_int(&vap->iv_ic->ic_montaps, 1);
1062 } else if (!bpf_peers_present(vap->iv_rawbpf)) {
1063 ieee80211_syncflag_ext(vap, -IEEE80211_FEXT_BPF);
1064 if (vap->iv_opmode == IEEE80211_M_MONITOR)
1065 atomic_subtract_int(&vap->iv_ic->ic_montaps, 1);
1071 * Change MAC address on the vap (if was not started).
1074 wlan_iflladdr(void *arg __unused, struct ifnet *ifp)
1076 /* NB: identify vap's by if_init */
1077 if (ifp->if_init == ieee80211_init &&
1078 (ifp->if_flags & IFF_UP) == 0) {
1079 struct ieee80211vap *vap = ifp->if_softc;
1081 IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp));
1086 * Fetch the VAP name.
1088 * This returns a const char pointer suitable for debugging,
1089 * but don't expect it to stick around for much longer.
1092 ieee80211_get_vap_ifname(struct ieee80211vap *vap)
1094 if (vap->iv_ifp == NULL)
1096 return vap->iv_ifp->if_xname;
1101 ieee80211_debugnet_init(struct ifnet *ifp, int *nrxr, int *ncl, int *clsize)
1103 struct ieee80211vap *vap;
1104 struct ieee80211com *ic;
1106 vap = if_getsoftc(ifp);
1110 ic->ic_debugnet_meth->dn8_init(ic, nrxr, ncl, clsize);
1111 IEEE80211_UNLOCK(ic);
1115 ieee80211_debugnet_event(struct ifnet *ifp, enum debugnet_ev ev)
1117 struct ieee80211vap *vap;
1118 struct ieee80211com *ic;
1120 vap = if_getsoftc(ifp);
1124 ic->ic_debugnet_meth->dn8_event(ic, ev);
1125 IEEE80211_UNLOCK(ic);
1129 ieee80211_debugnet_transmit(struct ifnet *ifp, struct mbuf *m)
1131 return (ieee80211_vap_transmit(ifp, m));
1135 ieee80211_debugnet_poll(struct ifnet *ifp, int count)
1137 struct ieee80211vap *vap;
1138 struct ieee80211com *ic;
1140 vap = if_getsoftc(ifp);
1143 return (ic->ic_debugnet_meth->dn8_poll(ic, count));
1150 * NB: the module name is "wlan" for compatibility with NetBSD.
1153 wlan_modevent(module_t mod, int type, void *unused)
1158 printf("wlan: <802.11 Link Layer>\n");
1159 wlan_bpfevent = EVENTHANDLER_REGISTER(bpf_track,
1160 bpf_track, 0, EVENTHANDLER_PRI_ANY);
1161 wlan_ifllevent = EVENTHANDLER_REGISTER(iflladdr_event,
1162 wlan_iflladdr, NULL, EVENTHANDLER_PRI_ANY);
1163 wlan_cloner = if_clone_simple(wlanname, wlan_clone_create,
1164 wlan_clone_destroy, 0);
1167 if_clone_detach(wlan_cloner);
1168 EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent);
1169 EVENTHANDLER_DEREGISTER(iflladdr_event, wlan_ifllevent);
1175 static moduledata_t wlan_mod = {
1180 DECLARE_MODULE(wlan, wlan_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
1181 MODULE_VERSION(wlan, 1);
1182 MODULE_DEPEND(wlan, ether, 1, 1, 1);
1183 #ifdef IEEE80211_ALQ
1184 MODULE_DEPEND(wlan, alq, 1, 1, 1);
1185 #endif /* IEEE80211_ALQ */