2 * SPDX-License-Identifier: BSD-2-Clause
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>
30 * IEEE 802.11 support (FreeBSD-specific code)
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>
41 #include <sys/module.h>
44 #include <sys/sysctl.h>
46 #include <sys/socket.h>
49 #include <net/debugnet.h>
51 #include <net/if_var.h>
52 #include <net/if_dl.h>
53 #include <net/if_clone.h>
54 #include <net/if_media.h>
55 #include <net/if_private.h>
56 #include <net/if_types.h>
57 #include <net/ethernet.h>
58 #include <net/route.h>
61 #include <net80211/ieee80211_var.h>
62 #include <net80211/ieee80211_input.h>
64 DEBUGNET_DEFINE(ieee80211);
65 SYSCTL_NODE(_net, OID_AUTO, wlan, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
66 "IEEE 80211 parameters");
68 #ifdef IEEE80211_DEBUG
69 static int ieee80211_debug = 0;
70 SYSCTL_INT(_net_wlan, OID_AUTO, debug, CTLFLAG_RW, &ieee80211_debug,
71 0, "debugging printfs");
74 static const char wlanname[] = "wlan";
75 static struct if_clone *wlan_cloner;
78 * priv(9) NET80211 checks.
79 * Return 0 if operation is allowed, E* (usually EPERM) otherwise.
82 ieee80211_priv_check_vap_getkey(u_long cmd __unused,
83 struct ieee80211vap *vap __unused, struct ifnet *ifp __unused)
86 return (priv_check(curthread, PRIV_NET80211_VAP_GETKEY));
90 ieee80211_priv_check_vap_manage(u_long cmd __unused,
91 struct ieee80211vap *vap __unused, struct ifnet *ifp __unused)
94 return (priv_check(curthread, PRIV_NET80211_VAP_MANAGE));
98 ieee80211_priv_check_vap_setmac(u_long cmd __unused,
99 struct ieee80211vap *vap __unused, struct ifnet *ifp __unused)
102 return (priv_check(curthread, PRIV_NET80211_VAP_SETMAC));
106 ieee80211_priv_check_create_vap(u_long cmd __unused,
107 struct ieee80211vap *vap __unused, struct ifnet *ifp __unused)
110 return (priv_check(curthread, PRIV_NET80211_CREATE_VAP));
114 wlan_clone_create(struct if_clone *ifc, char *name, size_t len,
115 struct ifc_data *ifd, struct ifnet **ifpp)
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 = ifc_copyin(ifd, &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, ifd->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);
170 wlan_clone_destroy(struct if_clone *ifc, struct ifnet *ifp, uint32_t flags)
172 struct ieee80211vap *vap = ifp->if_softc;
173 struct ieee80211com *ic = vap->iv_ic;
175 ic->ic_vap_delete(vap);
181 ieee80211_vap_destroy(struct ieee80211vap *vap)
183 CURVNET_SET(vap->iv_ifp->if_vnet);
184 if_clone_destroyif(wlan_cloner, vap->iv_ifp);
189 ieee80211_sysctl_msecs_ticks(SYSCTL_HANDLER_ARGS)
191 int msecs = ticks_to_msecs(*(int *)arg1);
194 error = sysctl_handle_int(oidp, &msecs, 0, req);
195 if (error || !req->newptr)
197 *(int *)arg1 = msecs_to_ticks(msecs);
202 ieee80211_sysctl_inact(SYSCTL_HANDLER_ARGS)
204 int inact = (*(int *)arg1) * IEEE80211_INACT_WAIT;
207 error = sysctl_handle_int(oidp, &inact, 0, req);
208 if (error || !req->newptr)
210 *(int *)arg1 = inact / IEEE80211_INACT_WAIT;
215 ieee80211_sysctl_parent(SYSCTL_HANDLER_ARGS)
217 struct ieee80211com *ic = arg1;
219 return SYSCTL_OUT_STR(req, ic->ic_name);
223 ieee80211_sysctl_radar(SYSCTL_HANDLER_ARGS)
225 struct ieee80211com *ic = arg1;
228 error = sysctl_handle_int(oidp, &t, 0, req);
229 if (error || !req->newptr)
232 ieee80211_dfs_notify_radar(ic, ic->ic_curchan);
233 IEEE80211_UNLOCK(ic);
238 * For now, just restart everything.
240 * Later on, it'd be nice to have a separate VAP restart to
241 * full-device restart.
244 ieee80211_sysctl_vap_restart(SYSCTL_HANDLER_ARGS)
246 struct ieee80211vap *vap = arg1;
249 error = sysctl_handle_int(oidp, &t, 0, req);
250 if (error || !req->newptr)
253 ieee80211_restart_all(vap->iv_ic);
258 ieee80211_sysctl_attach(struct ieee80211com *ic)
263 ieee80211_sysctl_detach(struct ieee80211com *ic)
268 ieee80211_sysctl_vattach(struct ieee80211vap *vap)
270 struct ifnet *ifp = vap->iv_ifp;
271 struct sysctl_ctx_list *ctx;
272 struct sysctl_oid *oid;
273 char num[14]; /* sufficient for 32 bits */
275 ctx = (struct sysctl_ctx_list *) IEEE80211_MALLOC(sizeof(struct sysctl_ctx_list),
276 M_DEVBUF, IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
278 if_printf(ifp, "%s: cannot allocate sysctl context!\n",
282 sysctl_ctx_init(ctx);
283 snprintf(num, sizeof(num), "%u", ifp->if_dunit);
284 oid = SYSCTL_ADD_NODE(ctx, &SYSCTL_NODE_CHILDREN(_net, wlan),
285 OID_AUTO, num, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "");
286 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
287 "%parent", CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT,
288 vap->iv_ic, 0, ieee80211_sysctl_parent, "A", "parent device");
289 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
290 "driver_caps", CTLFLAG_RW, &vap->iv_caps, 0,
291 "driver capabilities");
292 #ifdef IEEE80211_DEBUG
293 vap->iv_debug = ieee80211_debug;
294 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
295 "debug", CTLFLAG_RW, &vap->iv_debug, 0,
296 "control debugging printfs");
298 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
299 "bmiss_max", CTLFLAG_RW, &vap->iv_bmiss_max, 0,
300 "consecutive beacon misses before scanning");
301 /* XXX inherit from tunables */
302 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
303 "inact_run", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
304 &vap->iv_inact_run, 0, ieee80211_sysctl_inact, "I",
305 "station inactivity timeout (sec)");
306 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
307 "inact_probe", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
308 &vap->iv_inact_probe, 0, ieee80211_sysctl_inact, "I",
309 "station inactivity probe timeout (sec)");
310 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
311 "inact_auth", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
312 &vap->iv_inact_auth, 0, ieee80211_sysctl_inact, "I",
313 "station authentication timeout (sec)");
314 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
315 "inact_init", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
316 &vap->iv_inact_init, 0, ieee80211_sysctl_inact, "I",
317 "station initial state timeout (sec)");
318 if (vap->iv_htcaps & IEEE80211_HTC_HT) {
319 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
320 "ampdu_mintraffic_bk", CTLFLAG_RW,
321 &vap->iv_ampdu_mintraffic[WME_AC_BK], 0,
322 "BK traffic tx aggr threshold (pps)");
323 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
324 "ampdu_mintraffic_be", CTLFLAG_RW,
325 &vap->iv_ampdu_mintraffic[WME_AC_BE], 0,
326 "BE traffic tx aggr threshold (pps)");
327 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
328 "ampdu_mintraffic_vo", CTLFLAG_RW,
329 &vap->iv_ampdu_mintraffic[WME_AC_VO], 0,
330 "VO traffic tx aggr threshold (pps)");
331 SYSCTL_ADD_UINT(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
332 "ampdu_mintraffic_vi", CTLFLAG_RW,
333 &vap->iv_ampdu_mintraffic[WME_AC_VI], 0,
334 "VI traffic tx aggr threshold (pps)");
337 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
338 "force_restart", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
339 vap, 0, ieee80211_sysctl_vap_restart, "I", "force a VAP restart");
341 if (vap->iv_caps & IEEE80211_C_DFS) {
342 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
343 "radar", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
344 vap->iv_ic, 0, ieee80211_sysctl_radar, "I",
345 "simulate radar event");
347 vap->iv_sysctl = ctx;
352 ieee80211_sysctl_vdetach(struct ieee80211vap *vap)
355 if (vap->iv_sysctl != NULL) {
356 sysctl_ctx_free(vap->iv_sysctl);
357 IEEE80211_FREE(vap->iv_sysctl, M_DEVBUF);
358 vap->iv_sysctl = NULL;
363 ieee80211_com_vincref(struct ieee80211vap *vap)
367 ostate = atomic_fetchadd_32(&vap->iv_com_state, IEEE80211_COM_REF_ADD);
369 if (ostate & IEEE80211_COM_DETACHED) {
370 atomic_subtract_32(&vap->iv_com_state, IEEE80211_COM_REF_ADD);
374 if (_IEEE80211_MASKSHIFT(ostate, IEEE80211_COM_REF) ==
375 IEEE80211_COM_REF_MAX) {
376 atomic_subtract_32(&vap->iv_com_state, IEEE80211_COM_REF_ADD);
384 ieee80211_com_vdecref(struct ieee80211vap *vap)
388 ostate = atomic_fetchadd_32(&vap->iv_com_state, -IEEE80211_COM_REF_ADD);
390 KASSERT(_IEEE80211_MASKSHIFT(ostate, IEEE80211_COM_REF) != 0,
391 ("com reference counter underflow"));
397 ieee80211_com_vdetach(struct ieee80211vap *vap)
401 sleep_time = msecs_to_ticks(250);
402 atomic_set_32(&vap->iv_com_state, IEEE80211_COM_DETACHED);
403 while (_IEEE80211_MASKSHIFT(atomic_load_32(&vap->iv_com_state),
404 IEEE80211_COM_REF) != 0)
405 pause("comref", sleep_time);
409 ieee80211_node_dectestref(struct ieee80211_node *ni)
411 /* XXX need equivalent of atomic_dec_and_test */
412 atomic_subtract_int(&ni->ni_refcnt, 1);
413 return atomic_cmpset_int(&ni->ni_refcnt, 0, 1);
417 ieee80211_drain_ifq(struct ifqueue *ifq)
419 struct ieee80211_node *ni;
427 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
428 KASSERT(ni != NULL, ("frame w/o node"));
429 ieee80211_free_node(ni);
430 m->m_pkthdr.rcvif = NULL;
437 ieee80211_flush_ifq(struct ifqueue *ifq, struct ieee80211vap *vap)
439 struct ieee80211_node *ni;
440 struct mbuf *m, **mprev;
443 mprev = &ifq->ifq_head;
444 while ((m = *mprev) != NULL) {
445 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
446 if (ni != NULL && ni->ni_vap == vap) {
447 *mprev = m->m_nextpkt; /* remove from list */
451 ieee80211_free_node(ni); /* reclaim ref */
453 mprev = &m->m_nextpkt;
455 /* recalculate tail ptr */
457 for (; m != NULL && m->m_nextpkt != NULL; m = m->m_nextpkt)
464 * As above, for mbufs allocated with m_gethdr/MGETHDR
465 * or initialized by M_COPY_PKTHDR.
467 #define MC_ALIGN(m, len) \
469 (m)->m_data += rounddown2(MCLBYTES - (len), sizeof(long)); \
470 } while (/* CONSTCOND */ 0)
473 * Allocate and setup a management frame of the specified
474 * size. We return the mbuf and a pointer to the start
475 * of the contiguous data area that's been reserved based
476 * on the packet length. The data area is forced to 32-bit
477 * alignment and the buffer length to a multiple of 4 bytes.
478 * This is done mainly so beacon frames (that require this)
479 * can use this interface too.
482 ieee80211_getmgtframe(uint8_t **frm, int headroom, int pktlen)
488 * NB: we know the mbuf routines will align the data area
489 * so we don't need to do anything special.
491 len = roundup2(headroom + pktlen, 4);
492 KASSERT(len <= MCLBYTES, ("802.11 mgt frame too large: %u", len));
493 if (len < MINCLSIZE) {
494 m = m_gethdr(IEEE80211_M_NOWAIT, MT_DATA);
496 * Align the data in case additional headers are added.
497 * This should only happen when a WEP header is added
498 * which only happens for shared key authentication mgt
499 * frames which all fit in MHLEN.
504 m = m_getcl(IEEE80211_M_NOWAIT, MT_DATA, M_PKTHDR);
509 m->m_data += headroom;
515 #ifndef __NO_STRICT_ALIGNMENT
517 * Re-align the payload in the mbuf. This is mainly used (right now)
518 * to handle IP header alignment requirements on certain architectures.
521 ieee80211_realign(struct ieee80211vap *vap, struct mbuf *m, size_t align)
526 pktlen = m->m_pkthdr.len;
527 space = pktlen + align;
528 if (space < MINCLSIZE)
529 n = m_gethdr(IEEE80211_M_NOWAIT, MT_DATA);
531 n = m_getjcl(IEEE80211_M_NOWAIT, MT_DATA, M_PKTHDR,
532 space <= MCLBYTES ? MCLBYTES :
533 #if MJUMPAGESIZE != MCLBYTES
534 space <= MJUMPAGESIZE ? MJUMPAGESIZE :
536 space <= MJUM9BYTES ? MJUM9BYTES : MJUM16BYTES);
538 if (__predict_true(n != NULL)) {
540 n->m_data = (caddr_t)(ALIGN(n->m_data + align) - align);
541 m_copydata(m, 0, pktlen, mtod(n, caddr_t));
544 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
545 mtod(m, const struct ieee80211_frame *), NULL,
546 "%s", "no mbuf to realign");
547 vap->iv_stats.is_rx_badalign++;
552 #endif /* !__NO_STRICT_ALIGNMENT */
555 ieee80211_add_callback(struct mbuf *m,
556 void (*func)(struct ieee80211_node *, void *, int), void *arg)
559 struct ieee80211_cb *cb;
561 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_CALLBACK,
562 sizeof(struct ieee80211_cb), IEEE80211_M_NOWAIT);
566 cb = (struct ieee80211_cb *)(mtag+1);
569 m_tag_prepend(m, mtag);
570 m->m_flags |= M_TXCB;
575 ieee80211_add_xmit_params(struct mbuf *m,
576 const struct ieee80211_bpf_params *params)
579 struct ieee80211_tx_params *tx;
581 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_XMIT_PARAMS,
582 sizeof(struct ieee80211_tx_params), IEEE80211_M_NOWAIT);
586 tx = (struct ieee80211_tx_params *)(mtag+1);
587 memcpy(&tx->params, params, sizeof(struct ieee80211_bpf_params));
588 m_tag_prepend(m, mtag);
593 ieee80211_get_xmit_params(struct mbuf *m,
594 struct ieee80211_bpf_params *params)
597 struct ieee80211_tx_params *tx;
599 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_XMIT_PARAMS,
603 tx = (struct ieee80211_tx_params *)(mtag + 1);
604 memcpy(params, &tx->params, sizeof(struct ieee80211_bpf_params));
609 ieee80211_process_callback(struct ieee80211_node *ni,
610 struct mbuf *m, int status)
614 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_CALLBACK, NULL);
616 struct ieee80211_cb *cb = (struct ieee80211_cb *)(mtag+1);
617 cb->func(ni, cb->arg, status);
622 * Add RX parameters to the given mbuf.
624 * Returns 1 if OK, 0 on error.
627 ieee80211_add_rx_params(struct mbuf *m, const struct ieee80211_rx_stats *rxs)
630 struct ieee80211_rx_params *rx;
632 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_RECV_PARAMS,
633 sizeof(struct ieee80211_rx_stats), IEEE80211_M_NOWAIT);
637 rx = (struct ieee80211_rx_params *)(mtag + 1);
638 memcpy(&rx->params, rxs, sizeof(*rxs));
639 m_tag_prepend(m, mtag);
644 ieee80211_get_rx_params(struct mbuf *m, struct ieee80211_rx_stats *rxs)
647 struct ieee80211_rx_params *rx;
649 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_RECV_PARAMS,
653 rx = (struct ieee80211_rx_params *)(mtag + 1);
654 memcpy(rxs, &rx->params, sizeof(*rxs));
658 const struct ieee80211_rx_stats *
659 ieee80211_get_rx_params_ptr(struct mbuf *m)
662 struct ieee80211_rx_params *rx;
664 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_RECV_PARAMS,
668 rx = (struct ieee80211_rx_params *)(mtag + 1);
669 return (&rx->params);
673 * Add TOA parameters to the given mbuf.
676 ieee80211_add_toa_params(struct mbuf *m, const struct ieee80211_toa_params *p)
679 struct ieee80211_toa_params *rp;
681 mtag = m_tag_alloc(MTAG_ABI_NET80211, NET80211_TAG_TOA_PARAMS,
682 sizeof(struct ieee80211_toa_params), IEEE80211_M_NOWAIT);
686 rp = (struct ieee80211_toa_params *)(mtag + 1);
687 memcpy(rp, p, sizeof(*rp));
688 m_tag_prepend(m, mtag);
693 ieee80211_get_toa_params(struct mbuf *m, struct ieee80211_toa_params *p)
696 struct ieee80211_toa_params *rp;
698 mtag = m_tag_locate(m, MTAG_ABI_NET80211, NET80211_TAG_TOA_PARAMS,
702 rp = (struct ieee80211_toa_params *)(mtag + 1);
704 memcpy(p, rp, sizeof(*p));
709 * Transmit a frame to the parent interface.
712 ieee80211_parent_xmitpkt(struct ieee80211com *ic, struct mbuf *m)
717 * Assert the IC TX lock is held - this enforces the
718 * processing -> queuing order is maintained
720 IEEE80211_TX_LOCK_ASSERT(ic);
721 error = ic->ic_transmit(ic, m);
723 struct ieee80211_node *ni;
725 ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
727 /* XXX number of fragments */
728 if_inc_counter(ni->ni_vap->iv_ifp, IFCOUNTER_OERRORS, 1);
729 ieee80211_free_node(ni);
730 ieee80211_free_mbuf(m);
736 * Transmit a frame to the VAP interface.
739 ieee80211_vap_xmitpkt(struct ieee80211vap *vap, struct mbuf *m)
741 struct ifnet *ifp = vap->iv_ifp;
744 * When transmitting via the VAP, we shouldn't hold
745 * any IC TX lock as the VAP TX path will acquire it.
747 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
749 return (ifp->if_transmit(ifp, m));
753 #include <sys/libkern.h>
756 net80211_get_random_bytes(void *p, size_t n)
761 uint32_t v = arc4random();
762 size_t nb = n > sizeof(uint32_t) ? sizeof(uint32_t) : n;
763 bcopy(&v, dp, n > sizeof(uint32_t) ? sizeof(uint32_t) : n);
764 dp += sizeof(uint32_t), n -= nb;
769 * Helper function for events that pass just a single mac address.
772 notify_macaddr(struct ifnet *ifp, int op, const uint8_t mac[IEEE80211_ADDR_LEN])
774 struct ieee80211_join_event iev;
776 CURVNET_SET(ifp->if_vnet);
777 memset(&iev, 0, sizeof(iev));
778 IEEE80211_ADDR_COPY(iev.iev_addr, mac);
779 rt_ieee80211msg(ifp, op, &iev, sizeof(iev));
784 ieee80211_notify_node_join(struct ieee80211_node *ni, int newassoc)
786 struct ieee80211vap *vap = ni->ni_vap;
787 struct ifnet *ifp = vap->iv_ifp;
789 CURVNET_SET_QUIET(ifp->if_vnet);
790 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode join",
791 (ni == vap->iv_bss) ? "bss " : "");
793 if (ni == vap->iv_bss) {
794 notify_macaddr(ifp, newassoc ?
795 RTM_IEEE80211_ASSOC : RTM_IEEE80211_REASSOC, ni->ni_bssid);
796 if_link_state_change(ifp, LINK_STATE_UP);
798 notify_macaddr(ifp, newassoc ?
799 RTM_IEEE80211_JOIN : RTM_IEEE80211_REJOIN, ni->ni_macaddr);
805 ieee80211_notify_node_leave(struct ieee80211_node *ni)
807 struct ieee80211vap *vap = ni->ni_vap;
808 struct ifnet *ifp = vap->iv_ifp;
810 CURVNET_SET_QUIET(ifp->if_vnet);
811 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%snode leave",
812 (ni == vap->iv_bss) ? "bss " : "");
814 if (ni == vap->iv_bss) {
815 rt_ieee80211msg(ifp, RTM_IEEE80211_DISASSOC, NULL, 0);
816 if_link_state_change(ifp, LINK_STATE_DOWN);
818 /* fire off wireless event station leaving */
819 notify_macaddr(ifp, RTM_IEEE80211_LEAVE, ni->ni_macaddr);
825 ieee80211_notify_scan_done(struct ieee80211vap *vap)
827 struct ifnet *ifp = vap->iv_ifp;
829 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SCAN, "%s\n", "notify scan done");
831 /* dispatch wireless event indicating scan completed */
832 CURVNET_SET(ifp->if_vnet);
833 rt_ieee80211msg(ifp, RTM_IEEE80211_SCAN, NULL, 0);
838 ieee80211_notify_replay_failure(struct ieee80211vap *vap,
839 const struct ieee80211_frame *wh, const struct ieee80211_key *k,
840 u_int64_t rsc, int tid)
842 struct ifnet *ifp = vap->iv_ifp;
844 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2,
845 "%s replay detected tid %d <rsc %ju (%jx), csc %ju (%jx), keyix %u rxkeyix %u>",
846 k->wk_cipher->ic_name, tid,
849 (intmax_t) k->wk_keyrsc[tid],
850 (intmax_t) k->wk_keyrsc[tid],
851 k->wk_keyix, k->wk_rxkeyix);
853 if (ifp != NULL) { /* NB: for cipher test modules */
854 struct ieee80211_replay_event iev;
856 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1);
857 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2);
858 iev.iev_cipher = k->wk_cipher->ic_cipher;
859 if (k->wk_rxkeyix != IEEE80211_KEYIX_NONE)
860 iev.iev_keyix = k->wk_rxkeyix;
862 iev.iev_keyix = k->wk_keyix;
863 iev.iev_keyrsc = k->wk_keyrsc[tid];
865 CURVNET_SET(ifp->if_vnet);
866 rt_ieee80211msg(ifp, RTM_IEEE80211_REPLAY, &iev, sizeof(iev));
872 ieee80211_notify_michael_failure(struct ieee80211vap *vap,
873 const struct ieee80211_frame *wh, u_int keyix)
875 struct ifnet *ifp = vap->iv_ifp;
877 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO, wh->i_addr2,
878 "michael MIC verification failed <keyix %u>", keyix);
879 vap->iv_stats.is_rx_tkipmic++;
881 if (ifp != NULL) { /* NB: for cipher test modules */
882 struct ieee80211_michael_event iev;
884 IEEE80211_ADDR_COPY(iev.iev_dst, wh->i_addr1);
885 IEEE80211_ADDR_COPY(iev.iev_src, wh->i_addr2);
886 iev.iev_cipher = IEEE80211_CIPHER_TKIP;
887 iev.iev_keyix = keyix;
888 CURVNET_SET(ifp->if_vnet);
889 rt_ieee80211msg(ifp, RTM_IEEE80211_MICHAEL, &iev, sizeof(iev));
895 ieee80211_notify_wds_discover(struct ieee80211_node *ni)
897 struct ieee80211vap *vap = ni->ni_vap;
898 struct ifnet *ifp = vap->iv_ifp;
900 notify_macaddr(ifp, RTM_IEEE80211_WDS, ni->ni_macaddr);
904 ieee80211_notify_csa(struct ieee80211com *ic,
905 const struct ieee80211_channel *c, int mode, int count)
907 struct ieee80211_csa_event iev;
908 struct ieee80211vap *vap;
911 memset(&iev, 0, sizeof(iev));
912 iev.iev_flags = c->ic_flags;
913 iev.iev_freq = c->ic_freq;
914 iev.iev_ieee = c->ic_ieee;
916 iev.iev_count = count;
917 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
919 CURVNET_SET(ifp->if_vnet);
920 rt_ieee80211msg(ifp, RTM_IEEE80211_CSA, &iev, sizeof(iev));
926 ieee80211_notify_radar(struct ieee80211com *ic,
927 const struct ieee80211_channel *c)
929 struct ieee80211_radar_event iev;
930 struct ieee80211vap *vap;
933 memset(&iev, 0, sizeof(iev));
934 iev.iev_flags = c->ic_flags;
935 iev.iev_freq = c->ic_freq;
936 iev.iev_ieee = c->ic_ieee;
937 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
939 CURVNET_SET(ifp->if_vnet);
940 rt_ieee80211msg(ifp, RTM_IEEE80211_RADAR, &iev, sizeof(iev));
946 ieee80211_notify_cac(struct ieee80211com *ic,
947 const struct ieee80211_channel *c, enum ieee80211_notify_cac_event type)
949 struct ieee80211_cac_event iev;
950 struct ieee80211vap *vap;
953 memset(&iev, 0, sizeof(iev));
954 iev.iev_flags = c->ic_flags;
955 iev.iev_freq = c->ic_freq;
956 iev.iev_ieee = c->ic_ieee;
958 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
960 CURVNET_SET(ifp->if_vnet);
961 rt_ieee80211msg(ifp, RTM_IEEE80211_CAC, &iev, sizeof(iev));
967 ieee80211_notify_node_deauth(struct ieee80211_node *ni)
969 struct ieee80211vap *vap = ni->ni_vap;
970 struct ifnet *ifp = vap->iv_ifp;
972 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node deauth");
974 notify_macaddr(ifp, RTM_IEEE80211_DEAUTH, ni->ni_macaddr);
978 ieee80211_notify_node_auth(struct ieee80211_node *ni)
980 struct ieee80211vap *vap = ni->ni_vap;
981 struct ifnet *ifp = vap->iv_ifp;
983 IEEE80211_NOTE(vap, IEEE80211_MSG_NODE, ni, "%s", "node auth");
985 notify_macaddr(ifp, RTM_IEEE80211_AUTH, ni->ni_macaddr);
989 ieee80211_notify_country(struct ieee80211vap *vap,
990 const uint8_t bssid[IEEE80211_ADDR_LEN], const uint8_t cc[2])
992 struct ifnet *ifp = vap->iv_ifp;
993 struct ieee80211_country_event iev;
995 memset(&iev, 0, sizeof(iev));
996 IEEE80211_ADDR_COPY(iev.iev_addr, bssid);
997 iev.iev_cc[0] = cc[0];
998 iev.iev_cc[1] = cc[1];
999 CURVNET_SET(ifp->if_vnet);
1000 rt_ieee80211msg(ifp, RTM_IEEE80211_COUNTRY, &iev, sizeof(iev));
1005 ieee80211_notify_radio(struct ieee80211com *ic, int state)
1007 struct ieee80211_radio_event iev;
1008 struct ieee80211vap *vap;
1011 memset(&iev, 0, sizeof(iev));
1012 iev.iev_state = state;
1013 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1015 CURVNET_SET(ifp->if_vnet);
1016 rt_ieee80211msg(ifp, RTM_IEEE80211_RADIO, &iev, sizeof(iev));
1022 ieee80211_notify_ifnet_change(struct ieee80211vap *vap, int if_flags_mask)
1024 struct ifnet *ifp = vap->iv_ifp;
1026 IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG, "%s\n",
1027 "interface state change");
1029 CURVNET_SET(ifp->if_vnet);
1030 rt_ifmsg(ifp, if_flags_mask);
1035 ieee80211_load_module(const char *modname)
1039 (void)kern_kldload(curthread, modname, NULL);
1041 printf("%s: load the %s module by hand for now.\n", __func__, modname);
1045 static eventhandler_tag wlan_bpfevent;
1046 static eventhandler_tag wlan_ifllevent;
1049 bpf_track(void *arg, struct ifnet *ifp, int dlt, int attach)
1051 /* NB: identify vap's by if_init */
1052 if (dlt == DLT_IEEE802_11_RADIO &&
1053 ifp->if_init == ieee80211_init) {
1054 struct ieee80211vap *vap = ifp->if_softc;
1056 * Track bpf radiotap listener state. We mark the vap
1057 * to indicate if any listener is present and the com
1058 * to indicate if any listener exists on any associated
1059 * vap. This flag is used by drivers to prepare radiotap
1060 * state only when needed.
1063 ieee80211_syncflag_ext(vap, IEEE80211_FEXT_BPF);
1064 if (vap->iv_opmode == IEEE80211_M_MONITOR)
1065 atomic_add_int(&vap->iv_ic->ic_montaps, 1);
1066 } else if (!bpf_peers_present(vap->iv_rawbpf)) {
1067 ieee80211_syncflag_ext(vap, -IEEE80211_FEXT_BPF);
1068 if (vap->iv_opmode == IEEE80211_M_MONITOR)
1069 atomic_subtract_int(&vap->iv_ic->ic_montaps, 1);
1075 * Change MAC address on the vap (if was not started).
1078 wlan_iflladdr(void *arg __unused, struct ifnet *ifp)
1080 /* NB: identify vap's by if_init */
1081 if (ifp->if_init == ieee80211_init &&
1082 (ifp->if_flags & IFF_UP) == 0) {
1083 struct ieee80211vap *vap = ifp->if_softc;
1085 IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp));
1090 * Fetch the VAP name.
1092 * This returns a const char pointer suitable for debugging,
1093 * but don't expect it to stick around for much longer.
1096 ieee80211_get_vap_ifname(struct ieee80211vap *vap)
1098 if (vap->iv_ifp == NULL)
1100 return vap->iv_ifp->if_xname;
1105 ieee80211_debugnet_init(struct ifnet *ifp, int *nrxr, int *ncl, int *clsize)
1107 struct ieee80211vap *vap;
1108 struct ieee80211com *ic;
1110 vap = if_getsoftc(ifp);
1114 ic->ic_debugnet_meth->dn8_init(ic, nrxr, ncl, clsize);
1115 IEEE80211_UNLOCK(ic);
1119 ieee80211_debugnet_event(struct ifnet *ifp, enum debugnet_ev ev)
1121 struct ieee80211vap *vap;
1122 struct ieee80211com *ic;
1124 vap = if_getsoftc(ifp);
1128 ic->ic_debugnet_meth->dn8_event(ic, ev);
1129 IEEE80211_UNLOCK(ic);
1133 ieee80211_debugnet_transmit(struct ifnet *ifp, struct mbuf *m)
1135 return (ieee80211_vap_transmit(ifp, m));
1139 ieee80211_debugnet_poll(struct ifnet *ifp, int count)
1141 struct ieee80211vap *vap;
1142 struct ieee80211com *ic;
1144 vap = if_getsoftc(ifp);
1147 return (ic->ic_debugnet_meth->dn8_poll(ic, count));
1154 * NB: the module name is "wlan" for compatibility with NetBSD.
1157 wlan_modevent(module_t mod, int type, void *unused)
1162 printf("wlan: <802.11 Link Layer>\n");
1163 wlan_bpfevent = EVENTHANDLER_REGISTER(bpf_track,
1164 bpf_track, 0, EVENTHANDLER_PRI_ANY);
1165 wlan_ifllevent = EVENTHANDLER_REGISTER(iflladdr_event,
1166 wlan_iflladdr, NULL, EVENTHANDLER_PRI_ANY);
1167 struct if_clone_addreq req = {
1168 .create_f = wlan_clone_create,
1169 .destroy_f = wlan_clone_destroy,
1170 .flags = IFC_F_AUTOUNIT,
1172 wlan_cloner = ifc_attach_cloner(wlanname, &req);
1175 ifc_detach_cloner(wlan_cloner);
1176 EVENTHANDLER_DEREGISTER(bpf_track, wlan_bpfevent);
1177 EVENTHANDLER_DEREGISTER(iflladdr_event, wlan_ifllevent);
1183 static moduledata_t wlan_mod = {
1188 DECLARE_MODULE(wlan, wlan_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
1189 MODULE_VERSION(wlan, 1);
1190 MODULE_DEPEND(wlan, ether, 1, 1, 1);
1191 #ifdef IEEE80211_ALQ
1192 MODULE_DEPEND(wlan, alq, 1, 1, 1);
1193 #endif /* IEEE80211_ALQ */