2 * Copyright (c) 2001 Atsushi Onoe
3 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 * $FreeBSD: head/sys/net80211/ieee80211_output.c 198384 2009-10-23 11:13:08Z rpaulo $
30 #include "opt_inet6.h"
33 #include <sys/param.h>
34 #include <sys/systm.h>
36 #include <sys/kernel.h>
37 #include <sys/endian.h>
39 #include <sys/socket.h>
42 #include <net/ethernet.h>
43 #include <net/route.h>
45 #include <net/if_llc.h>
46 #include <net/if_media.h>
47 #include <net/ifq_var.h>
49 #include <netproto/802_11/ieee80211_var.h>
50 #include <netproto/802_11/ieee80211_regdomain.h>
51 #ifdef IEEE80211_SUPPORT_SUPERG
52 #include <netproto/802_11/ieee80211_superg.h>
54 #ifdef IEEE80211_SUPPORT_TDMA
55 #include <netproto/802_11/ieee80211_tdma.h>
57 #include <netproto/802_11/ieee80211_wds.h>
58 #include <netproto/802_11/ieee80211_mesh.h>
61 #include <netinet/in.h>
62 #include <netinet/if_ether.h>
63 #include <netinet/in_systm.h>
64 #include <netinet/ip.h>
67 #include <netinet/ip6.h>
70 #define ETHER_HEADER_COPY(dst, src) \
71 memcpy(dst, src, sizeof(struct ether_header))
73 /* unalligned little endian access */
74 #define LE_WRITE_2(p, v) do { \
75 ((uint8_t *)(p))[0] = (v) & 0xff; \
76 ((uint8_t *)(p))[1] = ((v) >> 8) & 0xff; \
78 #define LE_WRITE_4(p, v) do { \
79 ((uint8_t *)(p))[0] = (v) & 0xff; \
80 ((uint8_t *)(p))[1] = ((v) >> 8) & 0xff; \
81 ((uint8_t *)(p))[2] = ((v) >> 16) & 0xff; \
82 ((uint8_t *)(p))[3] = ((v) >> 24) & 0xff; \
85 static int ieee80211_fragment(struct ieee80211vap *, struct mbuf *,
86 u_int hdrsize, u_int ciphdrsize, u_int mtu);
87 static void ieee80211_tx_mgt_cb(struct ieee80211_node *, void *, int);
89 #ifdef IEEE80211_DEBUG
91 * Decide if an outbound management frame should be
92 * printed when debugging is enabled. This filters some
93 * of the less interesting frames that come frequently
97 doprint(struct ieee80211vap *vap, int subtype)
100 case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
101 return (vap->iv_opmode == IEEE80211_M_IBSS);
108 * Start method for vap's. All packets from the stack come
109 * through here. We handle common processing of the packets
110 * before dispatching them to the underlying device.
113 ieee80211_start(struct ifnet *ifp, struct ifaltq_subque *ifsq)
115 #define IS_DWDS(vap) \
116 (vap->iv_opmode == IEEE80211_M_WDS && \
117 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0)
118 struct ieee80211vap *vap = ifp->if_softc;
119 struct ieee80211com *ic = vap->iv_ic;
120 struct ifnet *parent = ic->ic_ifp;
121 struct ieee80211_node *ni;
122 struct mbuf *m = NULL;
123 struct ether_header *eh;
126 ASSERT_ALTQ_SQ_DEFAULT(ifp, ifsq);
128 /* NB: parent must be up and running */
129 if (!IFNET_IS_UP_RUNNING(parent)) {
130 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
131 "%s: ignore queue, parent %s not up+running\n",
132 __func__, parent->if_xname);
137 if (vap->iv_state == IEEE80211_S_SLEEP) {
139 * In power save, wakeup device for transmit.
141 ieee80211_new_state(vap, IEEE80211_S_RUN, 0);
146 * No data frames go out unless we're running.
147 * Note in particular this covers CAC and CSA
148 * states (though maybe we should check muting
151 if (vap->iv_state != IEEE80211_S_RUN) {
152 /* re-check under the com lock to avoid races */
153 if (vap->iv_state != IEEE80211_S_RUN) {
154 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
155 "%s: ignore queue, in %s state\n",
156 __func__, ieee80211_state_name[vap->iv_state]);
157 vap->iv_stats.is_tx_badstate++;
158 ifsq_set_oactive(ifsq);
163 m = ifsq_dequeue(ifsq, NULL);
167 * Sanitize mbuf flags for net80211 use. We cannot
168 * clear M_PWR_SAV or M_MORE_DATA because these may
169 * be set for frames that are re-submitted from the
172 * NB: This must be done before ieee80211_classify as
173 * it marks EAPOL in frames with M_EAPOL.
175 m->m_flags &= ~(M_80211_TX - M_PWR_SAV - M_MORE_DATA);
177 * Cancel any background scan.
179 if (ic->ic_flags & IEEE80211_F_SCAN)
180 ieee80211_cancel_anyscan(vap);
182 * Find the node for the destination so we can do
183 * things like power save and fast frames aggregation.
185 * NB: past this point various code assumes the first
186 * mbuf has the 802.3 header present (and contiguous).
189 if (m->m_len < sizeof(struct ether_header) &&
190 (m = m_pullup(m, sizeof(struct ether_header))) == NULL) {
191 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
192 "discard frame, %s\n", "m_pullup failed");
193 vap->iv_stats.is_tx_nobuf++; /* XXX */
194 IFNET_STAT_INC(ifp, oerrors, 1);
197 eh = mtod(m, struct ether_header *);
198 if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
201 * Only unicast frames from the above go out
202 * DWDS vaps; multicast frames are handled by
203 * dispatching the frame as it comes through
204 * the AP vap (see below).
206 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_WDS,
207 eh->ether_dhost, "mcast", "%s", "on DWDS");
208 vap->iv_stats.is_dwds_mcast++;
212 if (vap->iv_opmode == IEEE80211_M_HOSTAP) {
214 * Spam DWDS vap's w/ multicast traffic.
216 /* XXX only if dwds in use? */
217 ieee80211_dwds_mcast(vap, m);
220 #ifdef IEEE80211_SUPPORT_MESH
221 if (vap->iv_opmode != IEEE80211_M_MBSS) {
223 ni = ieee80211_find_txnode(vap, eh->ether_dhost);
225 /* NB: ieee80211_find_txnode does stat+msg */
226 IFNET_STAT_INC(ifp, oerrors, 1);
230 if (ni->ni_associd == 0 &&
231 (ni->ni_flags & IEEE80211_NODE_ASSOCID)) {
232 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT,
233 eh->ether_dhost, NULL,
234 "sta not associated (type 0x%04x)",
235 htons(eh->ether_type));
236 vap->iv_stats.is_tx_notassoc++;
237 IFNET_STAT_INC(ifp, oerrors, 1);
239 ieee80211_free_node(ni);
242 #ifdef IEEE80211_SUPPORT_MESH
244 if (!IEEE80211_ADDR_EQ(eh->ether_shost, vap->iv_myaddr)) {
246 * Proxy station only if configured.
248 if (!ieee80211_mesh_isproxyena(vap)) {
249 IEEE80211_DISCARD_MAC(vap,
250 IEEE80211_MSG_OUTPUT |
252 eh->ether_dhost, NULL,
253 "%s", "proxy not enabled");
254 vap->iv_stats.is_mesh_notproxy++;
255 IFNET_STAT_INC(ifp, oerrors, 1);
259 ieee80211_mesh_proxy_check(vap, eh->ether_shost);
261 ni = ieee80211_mesh_discover(vap, eh->ether_dhost, m);
264 * NB: ieee80211_mesh_discover holds/disposes
265 * frame (e.g. queueing on path discovery).
267 IFNET_STAT_INC(ifp, oerrors, 1);
272 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) &&
273 (m->m_flags & M_PWR_SAV) == 0) {
275 * Station in power save mode; pass the frame
276 * to the 802.11 layer and continue. We'll get
277 * the frame back when the time is right.
278 * XXX lose WDS vap linkage?
280 (void) ieee80211_pwrsave(ni, m);
281 ieee80211_free_node(ni);
284 /* calculate priority so drivers can find the tx queue */
285 if (ieee80211_classify(ni, m)) {
286 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT,
287 eh->ether_dhost, NULL,
288 "%s", "classification failure");
289 vap->iv_stats.is_tx_classify++;
290 IFNET_STAT_INC(ifp, oerrors, 1);
292 ieee80211_free_node(ni);
296 * Stash the node pointer. Note that we do this after
297 * any call to ieee80211_dwds_mcast because that code
298 * uses any existing value for rcvif to identify the
299 * interface it (might have been) received on.
301 m->m_pkthdr.rcvif = (void *)ni;
303 BPF_MTAP(ifp, m); /* 802.3 tx */
306 * Check if A-MPDU tx aggregation is setup or if we
307 * should try to enable it. The sta must be associated
308 * with HT and A-MPDU enabled for use. When the policy
309 * routine decides we should enable A-MPDU we issue an
310 * ADDBA request and wait for a reply. The frame being
311 * encapsulated will go out w/o using A-MPDU, or possibly
312 * it might be collected by the driver and held/retransmit.
313 * The default ic_ampdu_enable routine handles staggering
314 * ADDBA requests in case the receiver NAK's us or we are
315 * otherwise unable to establish a BA stream.
317 if ((ni->ni_flags & IEEE80211_NODE_AMPDU_TX) &&
318 (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_TX) &&
319 (m->m_flags & M_EAPOL) == 0) {
320 const int ac = M_WME_GETAC(m);
321 struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[ac];
323 ieee80211_txampdu_count_packet(tap);
324 if (IEEE80211_AMPDU_RUNNING(tap)) {
326 * Operational, mark frame for aggregation.
328 * XXX do tx aggregation here
330 m->m_flags |= M_AMPDU_MPDU;
331 } else if (!IEEE80211_AMPDU_REQUESTED(tap) &&
332 ic->ic_ampdu_enable(ni, tap)) {
334 * Not negotiated yet, request service.
336 ieee80211_ampdu_request(ni, tap);
337 /* XXX hold frame for reply? */
340 #ifdef IEEE80211_SUPPORT_SUPERG
341 else if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF)) {
342 m = ieee80211_ff_check(ni, m);
344 /* NB: any ni ref held on stageq */
348 #endif /* IEEE80211_SUPPORT_SUPERG */
349 if (__predict_true((vap->iv_caps & IEEE80211_C_8023ENCAP) == 0)) {
351 * Encapsulate the packet in prep for transmission.
353 m = ieee80211_encap(vap, ni, m);
355 /* NB: stat+msg handled in ieee80211_encap */
356 ieee80211_free_node(ni);
361 error = ieee80211_handoff(parent, m);
363 /* NB: IFQ_HANDOFF reclaims mbuf */
364 ieee80211_free_node(ni);
366 IFNET_STAT_INC(ifp, opackets, 1);
368 ic->ic_lastdata = ticks;
375 * 802.11 output routine. This is (currently) used only to
376 * connect bpf write calls to the 802.11 layer for injecting
380 ieee80211_output(struct ifnet *ifp, struct mbuf *m,
381 struct sockaddr *dst, struct rtentry *rt)
383 #define senderr(e) do { error = (e); goto bad;} while (0)
384 struct ieee80211_node *ni = NULL;
385 struct ieee80211vap *vap;
386 struct ieee80211_frame *wh;
387 struct ifaltq_subque *ifsq;
390 ifsq = ifq_get_subq_default(&ifp->if_snd);
391 if (ifsq_is_oactive(ifsq)) {
393 * Short-circuit requests if the vap is marked OACTIVE
394 * as this can happen because a packet came down through
395 * ieee80211_start before the vap entered RUN state in
396 * which case it's ok to just drop the frame. This
397 * should not be necessary but callers of if_output don't
404 * Hand to the 802.3 code if not tagged as
405 * a raw 802.11 frame.
407 if (dst->sa_family != AF_IEEE80211)
408 return vap->iv_output(ifp, m, dst, rt);
410 error = mac_ifnet_check_transmit(ifp, m);
414 if (ifp->if_flags & IFF_MONITOR)
416 if (!IFNET_IS_UP_RUNNING(ifp))
418 if (vap->iv_state == IEEE80211_S_CAC) {
419 IEEE80211_DPRINTF(vap,
420 IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH,
421 "block %s frame in CAC state\n", "raw data");
422 vap->iv_stats.is_tx_badstate++;
423 senderr(EIO); /* XXX */
425 /* XXX bypass bridge, pfil, carp, etc. */
427 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_ack))
428 senderr(EIO); /* XXX */
429 wh = mtod(m, struct ieee80211_frame *);
430 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
431 IEEE80211_FC0_VERSION_0)
432 senderr(EIO); /* XXX */
434 /* locate destination node */
435 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) {
436 case IEEE80211_FC1_DIR_NODS:
437 case IEEE80211_FC1_DIR_FROMDS:
438 ni = ieee80211_find_txnode(vap, wh->i_addr1);
440 case IEEE80211_FC1_DIR_TODS:
441 case IEEE80211_FC1_DIR_DSTODS:
442 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame))
443 senderr(EIO); /* XXX */
444 ni = ieee80211_find_txnode(vap, wh->i_addr3);
447 senderr(EIO); /* XXX */
451 * Permit packets w/ bpf params through regardless
452 * (see below about sa_len).
454 if (dst->sa_len == 0)
455 senderr(EHOSTUNREACH);
456 ni = ieee80211_ref_node(vap->iv_bss);
460 * Sanitize mbuf for net80211 flags leaked from above.
462 * NB: This must be done before ieee80211_classify as
463 * it marks EAPOL in frames with M_EAPOL.
465 m->m_flags &= ~M_80211_TX;
467 /* calculate priority so drivers can find the tx queue */
468 /* XXX assumes an 802.3 frame */
469 if (ieee80211_classify(ni, m))
470 senderr(EIO); /* XXX */
472 IFNET_STAT_INC(ifp, opackets, 1);
473 IEEE80211_NODE_STAT(ni, tx_data);
474 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
475 IEEE80211_NODE_STAT(ni, tx_mcast);
476 m->m_flags |= M_MCAST;
478 IEEE80211_NODE_STAT(ni, tx_ucast);
479 /* NB: ieee80211_encap does not include 802.11 header */
480 IEEE80211_NODE_STAT_ADD(ni, tx_bytes, m->m_pkthdr.len);
483 * NB: DLT_IEEE802_11_RADIO identifies the parameters are
484 * present by setting the sa_len field of the sockaddr (yes,
486 * NB: we assume sa_data is suitably aligned to cast.
488 return vap->iv_ic->ic_raw_xmit(ni, m,
489 (const struct ieee80211_bpf_params *)(dst->sa_len ?
490 dst->sa_data : NULL));
495 ieee80211_free_node(ni);
496 IFNET_STAT_INC(ifp, oerrors, 1);
502 * Set the direction field and address fields of an outgoing
503 * frame. Note this should be called early on in constructing
504 * a frame as it sets i_fc[1]; other bits can then be or'd in.
507 ieee80211_send_setup(
508 struct ieee80211_node *ni,
511 const uint8_t sa[IEEE80211_ADDR_LEN],
512 const uint8_t da[IEEE80211_ADDR_LEN],
513 const uint8_t bssid[IEEE80211_ADDR_LEN])
515 #define WH4(wh) ((struct ieee80211_frame_addr4 *)wh)
516 struct ieee80211vap *vap = ni->ni_vap;
517 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
520 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | type;
521 if ((type & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_DATA) {
522 switch (vap->iv_opmode) {
523 case IEEE80211_M_STA:
524 wh->i_fc[1] = IEEE80211_FC1_DIR_TODS;
525 IEEE80211_ADDR_COPY(wh->i_addr1, bssid);
526 IEEE80211_ADDR_COPY(wh->i_addr2, sa);
527 IEEE80211_ADDR_COPY(wh->i_addr3, da);
529 case IEEE80211_M_IBSS:
530 case IEEE80211_M_AHDEMO:
531 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
532 IEEE80211_ADDR_COPY(wh->i_addr1, da);
533 IEEE80211_ADDR_COPY(wh->i_addr2, sa);
534 IEEE80211_ADDR_COPY(wh->i_addr3, bssid);
536 case IEEE80211_M_HOSTAP:
537 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
538 IEEE80211_ADDR_COPY(wh->i_addr1, da);
539 IEEE80211_ADDR_COPY(wh->i_addr2, bssid);
540 IEEE80211_ADDR_COPY(wh->i_addr3, sa);
542 case IEEE80211_M_WDS:
543 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS;
544 IEEE80211_ADDR_COPY(wh->i_addr1, da);
545 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
546 IEEE80211_ADDR_COPY(wh->i_addr3, da);
547 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa);
549 case IEEE80211_M_MBSS:
550 #ifdef IEEE80211_SUPPORT_MESH
551 /* XXX add support for proxied addresses */
552 if (IEEE80211_IS_MULTICAST(da)) {
553 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
555 IEEE80211_ADDR_COPY(wh->i_addr1, da);
556 IEEE80211_ADDR_COPY(wh->i_addr2,
559 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS;
560 IEEE80211_ADDR_COPY(wh->i_addr1, da);
561 IEEE80211_ADDR_COPY(wh->i_addr2,
563 IEEE80211_ADDR_COPY(wh->i_addr3, da);
564 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa);
568 case IEEE80211_M_MONITOR: /* NB: to quiet compiler */
572 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
573 IEEE80211_ADDR_COPY(wh->i_addr1, da);
574 IEEE80211_ADDR_COPY(wh->i_addr2, sa);
575 #ifdef IEEE80211_SUPPORT_MESH
576 if (vap->iv_opmode == IEEE80211_M_MBSS)
577 IEEE80211_ADDR_COPY(wh->i_addr3, sa);
580 IEEE80211_ADDR_COPY(wh->i_addr3, bssid);
582 *(uint16_t *)&wh->i_dur[0] = 0;
584 seqno = ni->ni_txseqs[tid]++;
585 *(uint16_t *)&wh->i_seq[0] = htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
586 M_SEQNO_SET(m, seqno);
588 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
589 m->m_flags |= M_MCAST;
594 * Send a management frame to the specified node. The node pointer
595 * must have a reference as the pointer will be passed to the driver
596 * and potentially held for a long time. If the frame is successfully
597 * dispatched to the driver, then it is responsible for freeing the
598 * reference (and potentially free'ing up any associated storage);
599 * otherwise deal with reclaiming any reference (on error).
602 ieee80211_mgmt_output(struct ieee80211_node *ni, struct mbuf *m, int type,
603 struct ieee80211_bpf_params *params)
605 struct ieee80211vap *vap = ni->ni_vap;
606 struct ieee80211com *ic = ni->ni_ic;
607 struct ieee80211_frame *wh;
608 #ifdef IEEE80211_DEBUG
609 char ethstr[ETHER_ADDRSTRLEN + 1];
611 KASSERT(ni != NULL, ("null node"));
613 if (vap->iv_state == IEEE80211_S_CAC) {
614 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH,
615 ni, "block %s frame in CAC state",
616 ieee80211_mgt_subtype_name[
617 (type & IEEE80211_FC0_SUBTYPE_MASK) >>
618 IEEE80211_FC0_SUBTYPE_SHIFT]);
619 vap->iv_stats.is_tx_badstate++;
620 ieee80211_free_node(ni);
622 return EIO; /* XXX */
625 M_PREPEND(m, sizeof(struct ieee80211_frame), MB_DONTWAIT);
627 ieee80211_free_node(ni);
631 wh = mtod(m, struct ieee80211_frame *);
632 ieee80211_send_setup(ni, m,
633 IEEE80211_FC0_TYPE_MGT | type, IEEE80211_NONQOS_TID,
634 vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid);
635 if (params->ibp_flags & IEEE80211_BPF_CRYPTO) {
636 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr1,
637 "encrypting frame (%s)", __func__);
638 wh->i_fc[1] |= IEEE80211_FC1_WEP;
640 m->m_flags |= M_ENCAP; /* mark encapsulated */
642 KASSERT(type != IEEE80211_FC0_SUBTYPE_PROBE_RESP, ("probe response?"));
643 M_WME_SETAC(m, params->ibp_pri);
645 #ifdef IEEE80211_DEBUG
646 /* avoid printing too many frames */
647 if ((ieee80211_msg_debug(vap) && doprint(vap, type)) ||
648 ieee80211_msg_dumppkts(vap)) {
649 kprintf("[%s] send %s on channel %u\n",
650 kether_ntoa(wh->i_addr1, ethstr),
651 ieee80211_mgt_subtype_name[
652 (type & IEEE80211_FC0_SUBTYPE_MASK) >>
653 IEEE80211_FC0_SUBTYPE_SHIFT],
654 ieee80211_chan2ieee(ic, ic->ic_curchan));
657 IEEE80211_NODE_STAT(ni, tx_mgmt);
659 return ic->ic_raw_xmit(ni, m, params);
663 * Send a null data frame to the specified node. If the station
664 * is setup for QoS then a QoS Null Data frame is constructed.
665 * If this is a WDS station then a 4-address frame is constructed.
667 * NB: the caller is assumed to have setup a node reference
668 * for use; this is necessary to deal with a race condition
669 * when probing for inactive stations. Like ieee80211_mgmt_output
670 * we must cleanup any node reference on error; however we
671 * can safely just unref it as we know it will never be the
672 * last reference to the node.
675 ieee80211_send_nulldata(struct ieee80211_node *ni)
677 struct ieee80211vap *vap = ni->ni_vap;
678 struct ieee80211com *ic = ni->ni_ic;
680 struct ieee80211_frame *wh;
684 if (vap->iv_state == IEEE80211_S_CAC) {
685 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH,
686 ni, "block %s frame in CAC state", "null data");
687 ieee80211_unref_node(&ni);
688 vap->iv_stats.is_tx_badstate++;
689 return EIO; /* XXX */
692 if (ni->ni_flags & (IEEE80211_NODE_QOS|IEEE80211_NODE_HT))
693 hdrlen = sizeof(struct ieee80211_qosframe);
695 hdrlen = sizeof(struct ieee80211_frame);
696 /* NB: only WDS vap's get 4-address frames */
697 if (vap->iv_opmode == IEEE80211_M_WDS)
698 hdrlen += IEEE80211_ADDR_LEN;
699 if (ic->ic_flags & IEEE80211_F_DATAPAD)
700 hdrlen = roundup(hdrlen, sizeof(uint32_t));
702 m = ieee80211_getmgtframe(&frm, ic->ic_headroom + hdrlen, 0);
705 ieee80211_unref_node(&ni);
706 vap->iv_stats.is_tx_nobuf++;
709 KASSERT(M_LEADINGSPACE(m) >= hdrlen,
710 ("leading space %zd", M_LEADINGSPACE(m)));
711 M_PREPEND(m, hdrlen, MB_DONTWAIT);
713 /* NB: cannot happen */
714 ieee80211_free_node(ni);
718 wh = mtod(m, struct ieee80211_frame *); /* NB: a little lie */
719 if (ni->ni_flags & IEEE80211_NODE_QOS) {
720 const int tid = WME_AC_TO_TID(WME_AC_BE);
723 ieee80211_send_setup(ni, m,
724 IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_QOS_NULL,
725 tid, vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid);
727 if (vap->iv_opmode == IEEE80211_M_WDS)
728 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos;
730 qos = ((struct ieee80211_qosframe *) wh)->i_qos;
731 qos[0] = tid & IEEE80211_QOS_TID;
732 if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[WME_AC_BE].wmep_noackPolicy)
733 qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK;
736 ieee80211_send_setup(ni, m,
737 IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_NODATA,
738 IEEE80211_NONQOS_TID,
739 vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid);
741 if (vap->iv_opmode != IEEE80211_M_WDS) {
742 /* NB: power management bit is never sent by an AP */
743 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) &&
744 vap->iv_opmode != IEEE80211_M_HOSTAP)
745 wh->i_fc[1] |= IEEE80211_FC1_PWR_MGT;
747 m->m_len = m->m_pkthdr.len = hdrlen;
748 m->m_flags |= M_ENCAP; /* mark encapsulated */
750 M_WME_SETAC(m, WME_AC_BE);
752 IEEE80211_NODE_STAT(ni, tx_data);
754 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, ni,
755 "send %snull data frame on channel %u, pwr mgt %s",
756 ni->ni_flags & IEEE80211_NODE_QOS ? "QoS " : "",
757 ieee80211_chan2ieee(ic, ic->ic_curchan),
758 wh->i_fc[1] & IEEE80211_FC1_PWR_MGT ? "ena" : "dis");
760 return ic->ic_raw_xmit(ni, m, NULL);
764 * Assign priority to a frame based on any vlan tag assigned
765 * to the station and/or any Diffserv setting in an IP header.
766 * Finally, if an ACM policy is setup (in station mode) it's
770 ieee80211_classify(struct ieee80211_node *ni, struct mbuf *m)
772 const struct ether_header *eh = mtod(m, struct ether_header *);
773 int v_wme_ac, d_wme_ac, ac;
776 * Always promote PAE/EAPOL frames to high priority.
778 if (eh->ether_type == htons(ETHERTYPE_PAE)) {
779 /* NB: mark so others don't need to check header */
780 m->m_flags |= M_EAPOL;
785 * Non-qos traffic goes to BE.
787 if ((ni->ni_flags & IEEE80211_NODE_QOS) == 0) {
793 * If node has a vlan tag then all traffic
794 * to it must have a matching tag.
797 if (ni->ni_vlan != 0) {
798 if ((m->m_flags & M_VLANTAG) == 0) {
799 IEEE80211_NODE_STAT(ni, tx_novlantag);
803 if (EVL_VLANOFTAG(m->m_pkthdr.ether_vlantag) !=
804 EVL_VLANOFTAG(ni->ni_vlan)) {
805 IEEE80211_NODE_STAT(ni, tx_vlanmismatch);
808 /* map vlan priority to AC */
809 v_wme_ac = TID_TO_WME_AC(EVL_PRIOFTAG(ni->ni_vlan));
813 /* XXX m_copydata may be too slow for fast path */
815 if (eh->ether_type == htons(ETHERTYPE_IP)) {
818 * IP frame, map the DSCP bits from the TOS field.
820 /* NB: ip header may not be in first mbuf */
821 m_copydata(m, sizeof(struct ether_header) +
822 offsetof(struct ip, ip_tos), sizeof(tos), &tos);
823 tos >>= 5; /* NB: ECN + low 3 bits of DSCP */
824 d_wme_ac = TID_TO_WME_AC(tos);
828 if (eh->ether_type == htons(ETHERTYPE_IPV6)) {
832 * IPv6 frame, map the DSCP bits from the TOS field.
834 m_copydata(m, sizeof(struct ether_header) +
835 offsetof(struct ip6_hdr, ip6_flow), sizeof(flow),
837 tos = (uint8_t)(ntohl(flow) >> 20);
838 tos >>= 5; /* NB: ECN + low 3 bits of DSCP */
839 d_wme_ac = TID_TO_WME_AC(tos);
842 d_wme_ac = WME_AC_BE;
850 * Use highest priority AC.
852 if (v_wme_ac > d_wme_ac)
860 if (ni->ni_vap->iv_opmode == IEEE80211_M_STA) {
861 static const int acmap[4] = {
862 WME_AC_BK, /* WME_AC_BE */
863 WME_AC_BK, /* WME_AC_BK */
864 WME_AC_BE, /* WME_AC_VI */
865 WME_AC_VI, /* WME_AC_VO */
867 struct ieee80211com *ic = ni->ni_ic;
869 while (ac != WME_AC_BK &&
870 ic->ic_wme.wme_wmeBssChanParams.cap_wmeParams[ac].wmep_acm)
879 * Insure there is sufficient contiguous space to encapsulate the
880 * 802.11 data frame. If room isn't already there, arrange for it.
881 * Drivers and cipher modules assume we have done the necessary work
882 * and fail rudely if they don't find the space they need.
885 ieee80211_mbuf_adjust(struct ieee80211vap *vap, int hdrsize,
886 struct ieee80211_key *key, struct mbuf *m)
888 #define TO_BE_RECLAIMED (sizeof(struct ether_header) - sizeof(struct llc))
889 struct mbuf *mnew = NULL;
890 int needed_space = vap->iv_ic->ic_headroom + hdrsize;
893 /* XXX belongs in crypto code? */
894 needed_space += key->wk_cipher->ic_header;
897 * When crypto is being done in the host we must insure
898 * the data are writable for the cipher routines; clone
899 * a writable mbuf chain.
900 * XXX handle SWMIC specially
902 if (key->wk_flags & (IEEE80211_KEY_SWENCRYPT|IEEE80211_KEY_SWENMIC)) {
903 mnew = m_dup(m, MB_DONTWAIT);
905 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
906 "%s: cannot get writable mbuf\n", __func__);
907 vap->iv_stats.is_tx_nobuf++; /* XXX new stat */
915 * We know we are called just before stripping an Ethernet
916 * header and prepending an LLC header. This means we know
918 * sizeof(struct ether_header) - sizeof(struct llc)
919 * bytes recovered to which we need additional space for the
920 * 802.11 header and any crypto header.
922 /* XXX check trailing space and copy instead? */
923 if (M_LEADINGSPACE(m) < needed_space - TO_BE_RECLAIMED) {
924 struct mbuf *n = m_gethdr(MB_DONTWAIT, m->m_type);
926 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
927 "%s: cannot expand storage\n", __func__);
928 vap->iv_stats.is_tx_nobuf++;
932 KASSERT(needed_space <= MHLEN,
933 ("not enough room, need %u got %zu", needed_space, MHLEN));
935 * Setup new mbuf to have leading space to prepend the
936 * 802.11 header and any crypto header bits that are
937 * required (the latter are added when the driver calls
938 * back to ieee80211_crypto_encap to do crypto encapsulation).
940 /* NB: must be first 'cuz it clobbers m_data */
942 n->m_len = 0; /* NB: m_gethdr does not set */
943 n->m_data += needed_space;
945 * Pull up Ethernet header to create the expected layout.
946 * We could use m_pullup but that's overkill (i.e. we don't
947 * need the actual data) and it cannot fail so do it inline
950 /* NB: struct ether_header is known to be contiguous */
951 n->m_len += sizeof(struct ether_header);
952 m->m_len -= sizeof(struct ether_header);
953 m->m_data += sizeof(struct ether_header);
955 * Replace the head of the chain.
961 #undef TO_BE_RECLAIMED
965 * Return the transmit key to use in sending a unicast frame.
966 * If a unicast key is set we use that. When no unicast key is set
967 * we fall back to the default transmit key.
969 static __inline struct ieee80211_key *
970 ieee80211_crypto_getucastkey(struct ieee80211vap *vap,
971 struct ieee80211_node *ni)
973 if (IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)) {
974 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE ||
975 IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey]))
977 return &vap->iv_nw_keys[vap->iv_def_txkey];
979 return &ni->ni_ucastkey;
984 * Return the transmit key to use in sending a multicast frame.
985 * Multicast traffic always uses the group key which is installed as
986 * the default tx key.
988 static __inline struct ieee80211_key *
989 ieee80211_crypto_getmcastkey(struct ieee80211vap *vap,
990 struct ieee80211_node *ni)
992 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE ||
993 IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey]))
995 return &vap->iv_nw_keys[vap->iv_def_txkey];
999 * Encapsulate an outbound data frame. The mbuf chain is updated.
1000 * If an error is encountered NULL is returned. The caller is required
1001 * to provide a node reference and pullup the ethernet header in the
1004 * NB: Packet is assumed to be processed by ieee80211_classify which
1005 * marked EAPOL frames w/ M_EAPOL.
1008 ieee80211_encap(struct ieee80211vap *vap, struct ieee80211_node *ni,
1011 #define WH4(wh) ((struct ieee80211_frame_addr4 *)(wh))
1012 struct ieee80211com *ic = ni->ni_ic;
1013 #ifdef IEEE80211_SUPPORT_MESH
1014 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1015 struct ieee80211_meshcntl_ae10 *mc;
1017 struct ether_header eh;
1018 struct ieee80211_frame *wh;
1019 struct ieee80211_key *key;
1021 int hdrsize, hdrspace, datalen, addqos, txfrag, is4addr;
1022 ieee80211_seq seqno;
1023 int meshhdrsize, meshae;
1027 * Copy existing Ethernet header to a safe place. The
1028 * rest of the code assumes it's ok to strip it when
1029 * reorganizing state for the final encapsulation.
1031 KASSERT(m->m_len >= sizeof(eh), ("no ethernet header!"));
1032 ETHER_HEADER_COPY(&eh, mtod(m, caddr_t));
1035 * Insure space for additional headers. First identify
1036 * transmit key to use in calculating any buffer adjustments
1037 * required. This is also used below to do privacy
1038 * encapsulation work. Then calculate the 802.11 header
1039 * size and any padding required by the driver.
1041 * Note key may be NULL if we fall back to the default
1042 * transmit key and that is not set. In that case the
1043 * buffer may not be expanded as needed by the cipher
1044 * routines, but they will/should discard it.
1046 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
1047 if (vap->iv_opmode == IEEE80211_M_STA ||
1048 !IEEE80211_IS_MULTICAST(eh.ether_dhost) ||
1049 (vap->iv_opmode == IEEE80211_M_WDS &&
1050 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY)))
1051 key = ieee80211_crypto_getucastkey(vap, ni);
1053 key = ieee80211_crypto_getmcastkey(vap, ni);
1054 if (key == NULL && (m->m_flags & M_EAPOL) == 0) {
1055 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO,
1057 "no default transmit key (%s) deftxkey %u",
1058 __func__, vap->iv_def_txkey);
1059 vap->iv_stats.is_tx_nodefkey++;
1065 * XXX Some ap's don't handle QoS-encapsulated EAPOL
1066 * frames so suppress use. This may be an issue if other
1067 * ap's require all data frames to be QoS-encapsulated
1068 * once negotiated in which case we'll need to make this
1071 addqos = (ni->ni_flags & (IEEE80211_NODE_QOS|IEEE80211_NODE_HT)) &&
1072 (m->m_flags & M_EAPOL) == 0;
1074 hdrsize = sizeof(struct ieee80211_qosframe);
1076 hdrsize = sizeof(struct ieee80211_frame);
1077 #ifdef IEEE80211_SUPPORT_MESH
1078 if (vap->iv_opmode == IEEE80211_M_MBSS) {
1080 * Mesh data frames are encapsulated according to the
1081 * rules of Section 11B.8.5 (p.139 of D3.0 spec).
1082 * o Group Addressed data (aka multicast) originating
1083 * at the local sta are sent w/ 3-address format and
1084 * address extension mode 00
1085 * o Individually Addressed data (aka unicast) originating
1086 * at the local sta are sent w/ 4-address format and
1087 * address extension mode 00
1088 * o Group Addressed data forwarded from a non-mesh sta are
1089 * sent w/ 3-address format and address extension mode 01
1090 * o Individually Address data from another sta are sent
1091 * w/ 4-address format and address extension mode 10
1093 is4addr = 0; /* NB: don't use, disable */
1094 if (!IEEE80211_IS_MULTICAST(eh.ether_dhost))
1095 hdrsize += IEEE80211_ADDR_LEN; /* unicast are 4-addr */
1096 meshhdrsize = sizeof(struct ieee80211_meshcntl);
1097 /* XXX defines for AE modes */
1098 if (IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr)) {
1099 if (!IEEE80211_IS_MULTICAST(eh.ether_dhost))
1102 meshae = 4; /* NB: pseudo */
1103 } else if (IEEE80211_IS_MULTICAST(eh.ether_dhost)) {
1105 meshhdrsize += 1*IEEE80211_ADDR_LEN;
1108 meshhdrsize += 2*IEEE80211_ADDR_LEN;
1113 * 4-address frames need to be generated for:
1114 * o packets sent through a WDS vap (IEEE80211_M_WDS)
1115 * o packets sent through a vap marked for relaying
1116 * (e.g. a station operating with dynamic WDS)
1118 is4addr = vap->iv_opmode == IEEE80211_M_WDS ||
1119 ((vap->iv_flags_ext & IEEE80211_FEXT_4ADDR) &&
1120 !IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr));
1122 hdrsize += IEEE80211_ADDR_LEN;
1123 meshhdrsize = meshae = 0;
1124 #ifdef IEEE80211_SUPPORT_MESH
1128 * Honor driver DATAPAD requirement.
1130 if (ic->ic_flags & IEEE80211_F_DATAPAD)
1131 hdrspace = roundup(hdrsize, sizeof(uint32_t));
1135 if (__predict_true((m->m_flags & M_FF) == 0)) {
1139 m = ieee80211_mbuf_adjust(vap, hdrspace + meshhdrsize, key, m);
1141 /* NB: ieee80211_mbuf_adjust handles msgs+statistics */
1144 /* NB: this could be optimized 'cuz of ieee80211_mbuf_adjust */
1145 m_adj(m, sizeof(struct ether_header) - sizeof(struct llc));
1146 llc = mtod(m, struct llc *);
1147 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP;
1148 llc->llc_control = LLC_UI;
1149 llc->llc_snap.org_code[0] = 0;
1150 llc->llc_snap.org_code[1] = 0;
1151 llc->llc_snap.org_code[2] = 0;
1152 llc->llc_snap.ether_type = eh.ether_type;
1154 #ifdef IEEE80211_SUPPORT_SUPERG
1158 m = ieee80211_ff_encap(vap, m, hdrspace + meshhdrsize, key);
1163 datalen = m->m_pkthdr.len; /* NB: w/o 802.11 header */
1165 M_PREPEND(m, hdrspace + meshhdrsize, MB_DONTWAIT);
1167 vap->iv_stats.is_tx_nobuf++;
1170 wh = mtod(m, struct ieee80211_frame *);
1171 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_DATA;
1172 *(uint16_t *)wh->i_dur = 0;
1173 qos = NULL; /* NB: quiet compiler */
1175 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS;
1176 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr);
1177 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
1178 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost);
1179 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, eh.ether_shost);
1180 } else switch (vap->iv_opmode) {
1181 case IEEE80211_M_STA:
1182 wh->i_fc[1] = IEEE80211_FC1_DIR_TODS;
1183 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_bssid);
1184 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost);
1185 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost);
1187 case IEEE80211_M_IBSS:
1188 case IEEE80211_M_AHDEMO:
1189 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
1190 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost);
1191 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost);
1193 * NB: always use the bssid from iv_bss as the
1194 * neighbor's may be stale after an ibss merge
1196 IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_bss->ni_bssid);
1198 case IEEE80211_M_HOSTAP:
1199 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
1200 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost);
1201 IEEE80211_ADDR_COPY(wh->i_addr2, ni->ni_bssid);
1202 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_shost);
1204 #ifdef IEEE80211_SUPPORT_MESH
1205 case IEEE80211_M_MBSS:
1206 /* NB: offset by hdrspace to deal with DATAPAD */
1207 mc = (struct ieee80211_meshcntl_ae10 *)
1208 (mtod(m, uint8_t *) + hdrspace);
1210 case 0: /* ucast, no proxy */
1211 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS;
1212 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr);
1213 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
1214 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost);
1215 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, eh.ether_shost);
1217 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos;
1219 case 4: /* mcast, no proxy */
1220 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
1221 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost);
1222 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
1223 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_shost);
1224 mc->mc_flags = 0; /* NB: AE is really 0 */
1225 qos = ((struct ieee80211_qosframe *) wh)->i_qos;
1227 case 1: /* mcast, proxy */
1228 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
1229 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost);
1230 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
1231 IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_myaddr);
1233 IEEE80211_ADDR_COPY(mc->mc_addr4, eh.ether_shost);
1234 qos = ((struct ieee80211_qosframe *) wh)->i_qos;
1236 case 2: /* ucast, proxy */
1237 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS;
1238 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr);
1239 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
1240 /* XXX not right, need MeshDA */
1241 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost);
1242 /* XXX assume are MeshSA */
1243 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, vap->iv_myaddr);
1245 IEEE80211_ADDR_COPY(mc->mc_addr4, eh.ether_dhost);
1246 IEEE80211_ADDR_COPY(mc->mc_addr5, eh.ether_shost);
1247 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos;
1250 KASSERT(0, ("meshae %d", meshae));
1253 mc->mc_ttl = ms->ms_ttl;
1255 LE_WRITE_4(mc->mc_seq, ms->ms_seq);
1258 case IEEE80211_M_WDS: /* NB: is4addr should always be true */
1262 if (m->m_flags & M_MORE_DATA)
1263 wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA;
1268 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos;
1269 /* NB: mesh case handled earlier */
1270 } else if (vap->iv_opmode != IEEE80211_M_MBSS)
1271 qos = ((struct ieee80211_qosframe *) wh)->i_qos;
1272 ac = M_WME_GETAC(m);
1273 /* map from access class/queue to 11e header priorty value */
1274 tid = WME_AC_TO_TID(ac);
1275 qos[0] = tid & IEEE80211_QOS_TID;
1276 if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[ac].wmep_noackPolicy)
1277 qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK;
1279 wh->i_fc[0] |= IEEE80211_FC0_SUBTYPE_QOS;
1281 if ((m->m_flags & M_AMPDU_MPDU) == 0) {
1283 * NB: don't assign a sequence # to potential
1284 * aggregates; we expect this happens at the
1285 * point the frame comes off any aggregation q
1286 * as otherwise we may introduce holes in the
1287 * BA sequence space and/or make window accouting
1290 * XXX may want to control this with a driver
1291 * capability; this may also change when we pull
1292 * aggregation up into net80211
1294 seqno = ni->ni_txseqs[tid]++;
1295 *(uint16_t *)wh->i_seq =
1296 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
1297 M_SEQNO_SET(m, seqno);
1300 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++;
1301 *(uint16_t *)wh->i_seq =
1302 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
1303 M_SEQNO_SET(m, seqno);
1307 /* check if xmit fragmentation is required */
1308 txfrag = (m->m_pkthdr.len > vap->iv_fragthreshold &&
1309 !IEEE80211_IS_MULTICAST(wh->i_addr1) &&
1310 (vap->iv_caps & IEEE80211_C_TXFRAG) &&
1311 (m->m_flags & (M_FF | M_AMPDU_MPDU)) == 0);
1314 * IEEE 802.1X: send EAPOL frames always in the clear.
1315 * WPA/WPA2: encrypt EAPOL keys when pairwise keys are set.
1317 if ((m->m_flags & M_EAPOL) == 0 ||
1318 ((vap->iv_flags & IEEE80211_F_WPA) &&
1319 (vap->iv_opmode == IEEE80211_M_STA ?
1320 !IEEE80211_KEY_UNDEFINED(key) :
1321 !IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)))) {
1322 wh->i_fc[1] |= IEEE80211_FC1_WEP;
1323 if (!ieee80211_crypto_enmic(vap, key, m, txfrag)) {
1324 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT,
1326 "%s", "enmic failed, discard frame");
1327 vap->iv_stats.is_crypto_enmicfail++;
1332 if (txfrag && !ieee80211_fragment(vap, m, hdrsize,
1333 key != NULL ? key->wk_cipher->ic_header : 0, vap->iv_fragthreshold))
1336 m->m_flags |= M_ENCAP; /* mark encapsulated */
1338 IEEE80211_NODE_STAT(ni, tx_data);
1339 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1340 IEEE80211_NODE_STAT(ni, tx_mcast);
1341 m->m_flags |= M_MCAST;
1343 IEEE80211_NODE_STAT(ni, tx_ucast);
1344 IEEE80211_NODE_STAT_ADD(ni, tx_bytes, datalen);
1355 * Fragment the frame according to the specified mtu.
1356 * The size of the 802.11 header (w/o padding) is provided
1357 * so we don't need to recalculate it. We create a new
1358 * mbuf for each fragment and chain it through m_nextpkt;
1359 * we might be able to optimize this by reusing the original
1360 * packet's mbufs but that is significantly more complicated.
1363 ieee80211_fragment(struct ieee80211vap *vap, struct mbuf *m0,
1364 u_int hdrsize, u_int ciphdrsize, u_int mtu)
1366 struct ieee80211_frame *wh, *whf;
1367 struct mbuf *m, *prev, *next;
1368 u_int totalhdrsize, fragno, fragsize, off, remainder, payload;
1370 KASSERT(m0->m_nextpkt == NULL, ("mbuf already chained?"));
1371 KASSERT(m0->m_pkthdr.len > mtu,
1372 ("pktlen %u mtu %u", m0->m_pkthdr.len, mtu));
1374 wh = mtod(m0, struct ieee80211_frame *);
1375 /* NB: mark the first frag; it will be propagated below */
1376 wh->i_fc[1] |= IEEE80211_FC1_MORE_FRAG;
1377 totalhdrsize = hdrsize + ciphdrsize;
1379 off = mtu - ciphdrsize;
1380 remainder = m0->m_pkthdr.len - off;
1383 fragsize = totalhdrsize + remainder;
1386 /* XXX fragsize can be >2048! */
1387 KASSERT(fragsize < MCLBYTES,
1388 ("fragment size %u too big!", fragsize));
1389 if (fragsize > MHLEN)
1390 m = m_getcl(MB_DONTWAIT, MT_DATA, M_PKTHDR);
1392 m = m_gethdr(MB_DONTWAIT, MT_DATA);
1395 /* leave room to prepend any cipher header */
1396 m_align(m, fragsize - ciphdrsize);
1399 * Form the header in the fragment. Note that since
1400 * we mark the first fragment with the MORE_FRAG bit
1401 * it automatically is propagated to each fragment; we
1402 * need only clear it on the last fragment (done below).
1404 whf = mtod(m, struct ieee80211_frame *);
1405 memcpy(whf, wh, hdrsize);
1406 *(uint16_t *)&whf->i_seq[0] |= htole16(
1407 (fragno & IEEE80211_SEQ_FRAG_MASK) <<
1408 IEEE80211_SEQ_FRAG_SHIFT);
1411 payload = fragsize - totalhdrsize;
1412 /* NB: destination is known to be contiguous */
1413 m_copydata(m0, off, payload, mtod(m, uint8_t *) + hdrsize);
1414 m->m_len = hdrsize + payload;
1415 m->m_pkthdr.len = hdrsize + payload;
1416 m->m_flags |= M_FRAG;
1417 m->m_pkthdr.rcvif = m0->m_pkthdr.rcvif;
1419 /* chain up the fragment */
1420 prev->m_nextpkt = m;
1423 /* deduct fragment just formed */
1424 remainder -= payload;
1426 } while (remainder != 0);
1428 /* set the last fragment */
1429 m->m_flags |= M_LASTFRAG;
1430 whf->i_fc[1] &= ~IEEE80211_FC1_MORE_FRAG;
1432 /* strip first mbuf now that everything has been copied */
1433 m_adj(m0, -(m0->m_pkthdr.len - (mtu - ciphdrsize)));
1434 m0->m_flags |= M_FIRSTFRAG | M_FRAG;
1436 vap->iv_stats.is_tx_fragframes++;
1437 vap->iv_stats.is_tx_frags += fragno-1;
1441 /* reclaim fragments but leave original frame for caller to free */
1442 for (m = m0->m_nextpkt; m != NULL; m = next) {
1443 next = m->m_nextpkt;
1444 m->m_nextpkt = NULL; /* XXX paranoid */
1447 m0->m_nextpkt = NULL;
1452 * Add a supported rates element id to a frame.
1455 ieee80211_add_rates(uint8_t *frm, const struct ieee80211_rateset *rs)
1459 *frm++ = IEEE80211_ELEMID_RATES;
1460 nrates = rs->rs_nrates;
1461 if (nrates > IEEE80211_RATE_SIZE)
1462 nrates = IEEE80211_RATE_SIZE;
1464 memcpy(frm, rs->rs_rates, nrates);
1465 return frm + nrates;
1469 * Add an extended supported rates element id to a frame.
1472 ieee80211_add_xrates(uint8_t *frm, const struct ieee80211_rateset *rs)
1475 * Add an extended supported rates element if operating in 11g mode.
1477 if (rs->rs_nrates > IEEE80211_RATE_SIZE) {
1478 int nrates = rs->rs_nrates - IEEE80211_RATE_SIZE;
1479 *frm++ = IEEE80211_ELEMID_XRATES;
1481 memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates);
1488 * Add an ssid element to a frame.
1491 ieee80211_add_ssid(uint8_t *frm, const uint8_t *ssid, u_int len)
1493 *frm++ = IEEE80211_ELEMID_SSID;
1495 memcpy(frm, ssid, len);
1500 * Add an erp element to a frame.
1503 ieee80211_add_erp(uint8_t *frm, struct ieee80211com *ic)
1507 *frm++ = IEEE80211_ELEMID_ERP;
1510 if (ic->ic_nonerpsta != 0)
1511 erp |= IEEE80211_ERP_NON_ERP_PRESENT;
1512 if (ic->ic_flags & IEEE80211_F_USEPROT)
1513 erp |= IEEE80211_ERP_USE_PROTECTION;
1514 if (ic->ic_flags & IEEE80211_F_USEBARKER)
1515 erp |= IEEE80211_ERP_LONG_PREAMBLE;
1521 * Add a CFParams element to a frame.
1524 ieee80211_add_cfparms(uint8_t *frm, struct ieee80211com *ic)
1526 #define ADDSHORT(frm, v) do { \
1527 LE_WRITE_2(frm, v); \
1530 *frm++ = IEEE80211_ELEMID_CFPARMS;
1532 *frm++ = 0; /* CFP count */
1533 *frm++ = 2; /* CFP period */
1534 ADDSHORT(frm, 0); /* CFP MaxDuration (TU) */
1535 ADDSHORT(frm, 0); /* CFP CurRemaining (TU) */
1540 static __inline uint8_t *
1541 add_appie(uint8_t *frm, const struct ieee80211_appie *ie)
1543 memcpy(frm, ie->ie_data, ie->ie_len);
1544 return frm + ie->ie_len;
1547 static __inline uint8_t *
1548 add_ie(uint8_t *frm, const uint8_t *ie)
1550 memcpy(frm, ie, 2 + ie[1]);
1551 return frm + 2 + ie[1];
1554 #define WME_OUI_BYTES 0x00, 0x50, 0xf2
1556 * Add a WME information element to a frame.
1559 ieee80211_add_wme_info(uint8_t *frm, struct ieee80211_wme_state *wme)
1561 static const struct ieee80211_wme_info info = {
1562 .wme_id = IEEE80211_ELEMID_VENDOR,
1563 .wme_len = sizeof(struct ieee80211_wme_info) - 2,
1564 .wme_oui = { WME_OUI_BYTES },
1565 .wme_type = WME_OUI_TYPE,
1566 .wme_subtype = WME_INFO_OUI_SUBTYPE,
1567 .wme_version = WME_VERSION,
1570 memcpy(frm, &info, sizeof(info));
1571 return frm + sizeof(info);
1575 * Add a WME parameters element to a frame.
1578 ieee80211_add_wme_param(uint8_t *frm, struct ieee80211_wme_state *wme)
1580 #define SM(_v, _f) (((_v) << _f##_S) & _f)
1581 #define ADDSHORT(frm, v) do { \
1582 LE_WRITE_2(frm, v); \
1585 /* NB: this works 'cuz a param has an info at the front */
1586 static const struct ieee80211_wme_info param = {
1587 .wme_id = IEEE80211_ELEMID_VENDOR,
1588 .wme_len = sizeof(struct ieee80211_wme_param) - 2,
1589 .wme_oui = { WME_OUI_BYTES },
1590 .wme_type = WME_OUI_TYPE,
1591 .wme_subtype = WME_PARAM_OUI_SUBTYPE,
1592 .wme_version = WME_VERSION,
1596 memcpy(frm, ¶m, sizeof(param));
1597 frm += __offsetof(struct ieee80211_wme_info, wme_info);
1598 *frm++ = wme->wme_bssChanParams.cap_info; /* AC info */
1599 *frm++ = 0; /* reserved field */
1600 for (i = 0; i < WME_NUM_AC; i++) {
1601 const struct wmeParams *ac =
1602 &wme->wme_bssChanParams.cap_wmeParams[i];
1603 *frm++ = SM(i, WME_PARAM_ACI)
1604 | SM(ac->wmep_acm, WME_PARAM_ACM)
1605 | SM(ac->wmep_aifsn, WME_PARAM_AIFSN)
1607 *frm++ = SM(ac->wmep_logcwmax, WME_PARAM_LOGCWMAX)
1608 | SM(ac->wmep_logcwmin, WME_PARAM_LOGCWMIN)
1610 ADDSHORT(frm, ac->wmep_txopLimit);
1616 #undef WME_OUI_BYTES
1619 * Add an 11h Power Constraint element to a frame.
1622 ieee80211_add_powerconstraint(uint8_t *frm, struct ieee80211vap *vap)
1624 const struct ieee80211_channel *c = vap->iv_bss->ni_chan;
1625 /* XXX per-vap tx power limit? */
1626 int8_t limit = vap->iv_ic->ic_txpowlimit / 2;
1628 frm[0] = IEEE80211_ELEMID_PWRCNSTR;
1630 frm[2] = c->ic_maxregpower > limit ? c->ic_maxregpower - limit : 0;
1635 * Add an 11h Power Capability element to a frame.
1638 ieee80211_add_powercapability(uint8_t *frm, const struct ieee80211_channel *c)
1640 frm[0] = IEEE80211_ELEMID_PWRCAP;
1642 frm[2] = c->ic_minpower;
1643 frm[3] = c->ic_maxpower;
1648 * Add an 11h Supported Channels element to a frame.
1651 ieee80211_add_supportedchannels(uint8_t *frm, struct ieee80211com *ic)
1653 static const int ielen = 26;
1655 frm[0] = IEEE80211_ELEMID_SUPPCHAN;
1657 /* XXX not correct */
1658 memcpy(frm+2, ic->ic_chan_avail, ielen);
1659 return frm + 2 + ielen;
1663 * Add an 11h Channel Switch Announcement element to a frame.
1664 * Note that we use the per-vap CSA count to adjust the global
1665 * counter so we can use this routine to form probe response
1666 * frames and get the current count.
1669 ieee80211_add_csa(uint8_t *frm, struct ieee80211vap *vap)
1671 struct ieee80211com *ic = vap->iv_ic;
1672 struct ieee80211_csa_ie *csa = (struct ieee80211_csa_ie *) frm;
1674 csa->csa_ie = IEEE80211_ELEMID_CSA;
1676 csa->csa_mode = 1; /* XXX force quiet on channel */
1677 csa->csa_newchan = ieee80211_chan2ieee(ic, ic->ic_csa_newchan);
1678 csa->csa_count = ic->ic_csa_count - vap->iv_csa_count;
1679 return frm + sizeof(*csa);
1683 * Add an 11h country information element to a frame.
1686 ieee80211_add_countryie(uint8_t *frm, struct ieee80211com *ic)
1689 if (ic->ic_countryie == NULL ||
1690 ic->ic_countryie_chan != ic->ic_bsschan) {
1692 * Handle lazy construction of ie. This is done on
1693 * first use and after a channel change that requires
1696 if (ic->ic_countryie != NULL)
1697 kfree(ic->ic_countryie, M_80211_NODE_IE);
1698 ic->ic_countryie = ieee80211_alloc_countryie(ic);
1699 if (ic->ic_countryie == NULL)
1701 ic->ic_countryie_chan = ic->ic_bsschan;
1703 return add_appie(frm, ic->ic_countryie);
1707 * Send a probe request frame with the specified ssid
1708 * and any optional information element data.
1711 ieee80211_send_probereq(struct ieee80211_node *ni,
1712 const uint8_t sa[IEEE80211_ADDR_LEN],
1713 const uint8_t da[IEEE80211_ADDR_LEN],
1714 const uint8_t bssid[IEEE80211_ADDR_LEN],
1715 const uint8_t *ssid, size_t ssidlen)
1717 struct ieee80211vap *vap = ni->ni_vap;
1718 struct ieee80211com *ic = ni->ni_ic;
1719 const struct ieee80211_txparam *tp;
1720 struct ieee80211_bpf_params params;
1721 const struct ieee80211_rateset *rs;
1724 #ifdef IEEE80211_DEBUG
1725 char ethstr[ETHER_ADDRSTRLEN + 1];
1728 if (vap->iv_state == IEEE80211_S_CAC) {
1729 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni,
1730 "block %s frame in CAC state", "probe request");
1731 vap->iv_stats.is_tx_badstate++;
1732 return EIO; /* XXX */
1736 * Hold a reference on the node so it doesn't go away until after
1737 * the xmit is complete all the way in the driver. On error we
1738 * will remove our reference.
1740 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1741 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n",
1743 ni, kether_ntoa(ni->ni_macaddr, ethstr),
1744 ieee80211_node_refcnt(ni)+1);
1745 ieee80211_ref_node(ni);
1748 * prreq frame format
1750 * [tlv] supported rates
1751 * [tlv] RSN (optional)
1752 * [tlv] extended supported rates
1753 * [tlv] WPA (optional)
1754 * [tlv] user-specified ie's
1756 m = ieee80211_getmgtframe(&frm,
1757 ic->ic_headroom + sizeof(struct ieee80211_frame),
1758 2 + IEEE80211_NWID_LEN
1759 + 2 + IEEE80211_RATE_SIZE
1760 + sizeof(struct ieee80211_ie_wpa)
1761 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
1762 + sizeof(struct ieee80211_ie_wpa)
1763 + (vap->iv_appie_probereq != NULL ?
1764 vap->iv_appie_probereq->ie_len : 0)
1767 vap->iv_stats.is_tx_nobuf++;
1768 ieee80211_free_node(ni);
1772 frm = ieee80211_add_ssid(frm, ssid, ssidlen);
1773 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
1774 frm = ieee80211_add_rates(frm, rs);
1775 if (vap->iv_flags & IEEE80211_F_WPA2) {
1776 if (vap->iv_rsn_ie != NULL)
1777 frm = add_ie(frm, vap->iv_rsn_ie);
1778 /* XXX else complain? */
1780 frm = ieee80211_add_xrates(frm, rs);
1781 if (vap->iv_flags & IEEE80211_F_WPA1) {
1782 if (vap->iv_wpa_ie != NULL)
1783 frm = add_ie(frm, vap->iv_wpa_ie);
1784 /* XXX else complain? */
1786 if (vap->iv_appie_probereq != NULL)
1787 frm = add_appie(frm, vap->iv_appie_probereq);
1788 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
1790 KASSERT(M_LEADINGSPACE(m) >= sizeof(struct ieee80211_frame),
1791 ("leading space %zd", M_LEADINGSPACE(m)));
1792 M_PREPEND(m, sizeof(struct ieee80211_frame), MB_DONTWAIT);
1794 /* NB: cannot happen */
1795 ieee80211_free_node(ni);
1799 ieee80211_send_setup(ni, m,
1800 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ,
1801 IEEE80211_NONQOS_TID, sa, da, bssid);
1802 /* XXX power management? */
1803 m->m_flags |= M_ENCAP; /* mark encapsulated */
1805 M_WME_SETAC(m, WME_AC_BE);
1807 IEEE80211_NODE_STAT(ni, tx_probereq);
1808 IEEE80211_NODE_STAT(ni, tx_mgmt);
1810 IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS,
1811 "send probe req on channel %u bssid %s ssid \"%.*s\"\n",
1812 ieee80211_chan2ieee(ic, ic->ic_curchan), kether_ntoa(bssid, ethstr),
1813 (int)ssidlen, ssid);
1815 memset(¶ms, 0, sizeof(params));
1816 params.ibp_pri = M_WME_GETAC(m);
1817 tp = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)];
1818 params.ibp_rate0 = tp->mgmtrate;
1819 if (IEEE80211_IS_MULTICAST(da)) {
1820 params.ibp_flags |= IEEE80211_BPF_NOACK;
1821 params.ibp_try0 = 1;
1823 params.ibp_try0 = tp->maxretry;
1824 params.ibp_power = ni->ni_txpower;
1825 return ic->ic_raw_xmit(ni, m, ¶ms);
1829 * Calculate capability information for mgt frames.
1832 ieee80211_getcapinfo(struct ieee80211vap *vap, struct ieee80211_channel *chan)
1834 struct ieee80211com *ic = vap->iv_ic;
1837 KASSERT(vap->iv_opmode != IEEE80211_M_STA, ("station mode"));
1839 if (vap->iv_opmode == IEEE80211_M_HOSTAP)
1840 capinfo = IEEE80211_CAPINFO_ESS;
1841 else if (vap->iv_opmode == IEEE80211_M_IBSS)
1842 capinfo = IEEE80211_CAPINFO_IBSS;
1845 if (vap->iv_flags & IEEE80211_F_PRIVACY)
1846 capinfo |= IEEE80211_CAPINFO_PRIVACY;
1847 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
1848 IEEE80211_IS_CHAN_2GHZ(chan))
1849 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
1850 if (ic->ic_flags & IEEE80211_F_SHSLOT)
1851 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
1852 if (IEEE80211_IS_CHAN_5GHZ(chan) && (vap->iv_flags & IEEE80211_F_DOTH))
1853 capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT;
1858 * Send a management frame. The node is for the destination (or ic_bss
1859 * when in station mode). Nodes other than ic_bss have their reference
1860 * count bumped to reflect our use for an indeterminant time.
1863 ieee80211_send_mgmt(struct ieee80211_node *ni, int type, int arg)
1865 #define HTFLAGS (IEEE80211_NODE_HT | IEEE80211_NODE_HTCOMPAT)
1866 #define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0)
1867 struct ieee80211vap *vap = ni->ni_vap;
1868 struct ieee80211com *ic = ni->ni_ic;
1869 struct ieee80211_node *bss = vap->iv_bss;
1870 struct ieee80211_bpf_params params;
1874 int has_challenge, is_shared_key, ret, status;
1875 #ifdef IEEE80211_DEBUG
1876 char ethstr[ETHER_ADDRSTRLEN + 1];
1879 KASSERT(ni != NULL, ("null node"));
1882 * Hold a reference on the node so it doesn't go away until after
1883 * the xmit is complete all the way in the driver. On error we
1884 * will remove our reference.
1886 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1887 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n",
1889 ni, kether_ntoa(ni->ni_macaddr, ethstr),
1890 ieee80211_node_refcnt(ni)+1);
1891 ieee80211_ref_node(ni);
1893 memset(¶ms, 0, sizeof(params));
1896 case IEEE80211_FC0_SUBTYPE_AUTH:
1899 has_challenge = ((arg == IEEE80211_AUTH_SHARED_CHALLENGE ||
1900 arg == IEEE80211_AUTH_SHARED_RESPONSE) &&
1901 ni->ni_challenge != NULL);
1904 * Deduce whether we're doing open authentication or
1905 * shared key authentication. We do the latter if
1906 * we're in the middle of a shared key authentication
1907 * handshake or if we're initiating an authentication
1908 * request and configured to use shared key.
1910 is_shared_key = has_challenge ||
1911 arg >= IEEE80211_AUTH_SHARED_RESPONSE ||
1912 (arg == IEEE80211_AUTH_SHARED_REQUEST &&
1913 bss->ni_authmode == IEEE80211_AUTH_SHARED);
1915 m = ieee80211_getmgtframe(&frm,
1916 ic->ic_headroom + sizeof(struct ieee80211_frame),
1917 3 * sizeof(uint16_t)
1918 + (has_challenge && status == IEEE80211_STATUS_SUCCESS ?
1919 sizeof(uint16_t)+IEEE80211_CHALLENGE_LEN : 0)
1922 senderr(ENOMEM, is_tx_nobuf);
1924 ((uint16_t *)frm)[0] =
1925 (is_shared_key) ? htole16(IEEE80211_AUTH_ALG_SHARED)
1926 : htole16(IEEE80211_AUTH_ALG_OPEN);
1927 ((uint16_t *)frm)[1] = htole16(arg); /* sequence number */
1928 ((uint16_t *)frm)[2] = htole16(status);/* status */
1930 if (has_challenge && status == IEEE80211_STATUS_SUCCESS) {
1931 ((uint16_t *)frm)[3] =
1932 htole16((IEEE80211_CHALLENGE_LEN << 8) |
1933 IEEE80211_ELEMID_CHALLENGE);
1934 memcpy(&((uint16_t *)frm)[4], ni->ni_challenge,
1935 IEEE80211_CHALLENGE_LEN);
1936 m->m_pkthdr.len = m->m_len =
1937 4 * sizeof(uint16_t) + IEEE80211_CHALLENGE_LEN;
1938 if (arg == IEEE80211_AUTH_SHARED_RESPONSE) {
1939 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni,
1940 "request encrypt frame (%s)", __func__);
1941 /* mark frame for encryption */
1942 params.ibp_flags |= IEEE80211_BPF_CRYPTO;
1945 m->m_pkthdr.len = m->m_len = 3 * sizeof(uint16_t);
1947 /* XXX not right for shared key */
1948 if (status == IEEE80211_STATUS_SUCCESS)
1949 IEEE80211_NODE_STAT(ni, tx_auth);
1951 IEEE80211_NODE_STAT(ni, tx_auth_fail);
1953 if (vap->iv_opmode == IEEE80211_M_STA)
1954 ieee80211_add_callback(m, ieee80211_tx_mgt_cb,
1955 (void *) vap->iv_state);
1958 case IEEE80211_FC0_SUBTYPE_DEAUTH:
1959 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni,
1960 "send station deauthenticate (reason %d)", arg);
1961 m = ieee80211_getmgtframe(&frm,
1962 ic->ic_headroom + sizeof(struct ieee80211_frame),
1965 senderr(ENOMEM, is_tx_nobuf);
1966 *(uint16_t *)frm = htole16(arg); /* reason */
1967 m->m_pkthdr.len = m->m_len = sizeof(uint16_t);
1969 IEEE80211_NODE_STAT(ni, tx_deauth);
1970 IEEE80211_NODE_STAT_SET(ni, tx_deauth_code, arg);
1972 ieee80211_node_unauthorize(ni); /* port closed */
1975 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
1976 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
1978 * asreq frame format
1979 * [2] capability information
1980 * [2] listen interval
1981 * [6*] current AP address (reassoc only)
1983 * [tlv] supported rates
1984 * [tlv] extended supported rates
1985 * [4] power capability (optional)
1986 * [28] supported channels (optional)
1987 * [tlv] HT capabilities
1988 * [tlv] WME (optional)
1989 * [tlv] Vendor OUI HT capabilities (optional)
1990 * [tlv] Atheros capabilities (if negotiated)
1991 * [tlv] AppIE's (optional)
1993 m = ieee80211_getmgtframe(&frm,
1994 ic->ic_headroom + sizeof(struct ieee80211_frame),
1997 + IEEE80211_ADDR_LEN
1998 + 2 + IEEE80211_NWID_LEN
1999 + 2 + IEEE80211_RATE_SIZE
2000 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2003 + sizeof(struct ieee80211_wme_info)
2004 + sizeof(struct ieee80211_ie_htcap)
2005 + 4 + sizeof(struct ieee80211_ie_htcap)
2006 #ifdef IEEE80211_SUPPORT_SUPERG
2007 + sizeof(struct ieee80211_ath_ie)
2009 + (vap->iv_appie_wpa != NULL ?
2010 vap->iv_appie_wpa->ie_len : 0)
2011 + (vap->iv_appie_assocreq != NULL ?
2012 vap->iv_appie_assocreq->ie_len : 0)
2015 senderr(ENOMEM, is_tx_nobuf);
2017 KASSERT(vap->iv_opmode == IEEE80211_M_STA,
2018 ("wrong mode %u", vap->iv_opmode));
2019 capinfo = IEEE80211_CAPINFO_ESS;
2020 if (vap->iv_flags & IEEE80211_F_PRIVACY)
2021 capinfo |= IEEE80211_CAPINFO_PRIVACY;
2023 * NB: Some 11a AP's reject the request when
2024 * short premable is set.
2026 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
2027 IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan))
2028 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
2029 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
2030 (ic->ic_caps & IEEE80211_C_SHSLOT))
2031 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
2032 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) &&
2033 (vap->iv_flags & IEEE80211_F_DOTH))
2034 capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT;
2035 *(uint16_t *)frm = htole16(capinfo);
2038 KASSERT(bss->ni_intval != 0, ("beacon interval is zero!"));
2039 *(uint16_t *)frm = htole16(howmany(ic->ic_lintval,
2043 if (type == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) {
2044 IEEE80211_ADDR_COPY(frm, bss->ni_bssid);
2045 frm += IEEE80211_ADDR_LEN;
2048 frm = ieee80211_add_ssid(frm, ni->ni_essid, ni->ni_esslen);
2049 frm = ieee80211_add_rates(frm, &ni->ni_rates);
2050 if (vap->iv_flags & IEEE80211_F_WPA2) {
2051 if (vap->iv_rsn_ie != NULL)
2052 frm = add_ie(frm, vap->iv_rsn_ie);
2053 /* XXX else complain? */
2055 frm = ieee80211_add_xrates(frm, &ni->ni_rates);
2056 if (capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) {
2057 frm = ieee80211_add_powercapability(frm,
2059 frm = ieee80211_add_supportedchannels(frm, ic);
2061 if ((vap->iv_flags_ht & IEEE80211_FHT_HT) &&
2062 ni->ni_ies.htcap_ie != NULL &&
2063 ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_HTCAP)
2064 frm = ieee80211_add_htcap(frm, ni);
2065 if (vap->iv_flags & IEEE80211_F_WPA1) {
2066 if (vap->iv_wpa_ie != NULL)
2067 frm = add_ie(frm, vap->iv_wpa_ie);
2068 /* XXX else complain */
2070 if ((ic->ic_flags & IEEE80211_F_WME) &&
2071 ni->ni_ies.wme_ie != NULL)
2072 frm = ieee80211_add_wme_info(frm, &ic->ic_wme);
2073 if ((vap->iv_flags_ht & IEEE80211_FHT_HT) &&
2074 ni->ni_ies.htcap_ie != NULL &&
2075 ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_VENDOR)
2076 frm = ieee80211_add_htcap_vendor(frm, ni);
2077 #ifdef IEEE80211_SUPPORT_SUPERG
2078 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS)) {
2079 frm = ieee80211_add_ath(frm,
2080 IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS),
2081 ((vap->iv_flags & IEEE80211_F_WPA) == 0 &&
2082 ni->ni_authmode != IEEE80211_AUTH_8021X) ?
2083 vap->iv_def_txkey : IEEE80211_KEYIX_NONE);
2085 #endif /* IEEE80211_SUPPORT_SUPERG */
2086 if (vap->iv_appie_assocreq != NULL)
2087 frm = add_appie(frm, vap->iv_appie_assocreq);
2088 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2090 ieee80211_add_callback(m, ieee80211_tx_mgt_cb,
2091 (void *) vap->iv_state);
2094 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2095 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2097 * asresp frame format
2098 * [2] capability information
2100 * [2] association ID
2101 * [tlv] supported rates
2102 * [tlv] extended supported rates
2103 * [tlv] HT capabilities (standard, if STA enabled)
2104 * [tlv] HT information (standard, if STA enabled)
2105 * [tlv] WME (if configured and STA enabled)
2106 * [tlv] HT capabilities (vendor OUI, if STA enabled)
2107 * [tlv] HT information (vendor OUI, if STA enabled)
2108 * [tlv] Atheros capabilities (if STA enabled)
2109 * [tlv] AppIE's (optional)
2111 m = ieee80211_getmgtframe(&frm,
2112 ic->ic_headroom + sizeof(struct ieee80211_frame),
2116 + 2 + IEEE80211_RATE_SIZE
2117 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2118 + sizeof(struct ieee80211_ie_htcap) + 4
2119 + sizeof(struct ieee80211_ie_htinfo) + 4
2120 + sizeof(struct ieee80211_wme_param)
2121 #ifdef IEEE80211_SUPPORT_SUPERG
2122 + sizeof(struct ieee80211_ath_ie)
2124 + (vap->iv_appie_assocresp != NULL ?
2125 vap->iv_appie_assocresp->ie_len : 0)
2128 senderr(ENOMEM, is_tx_nobuf);
2130 capinfo = ieee80211_getcapinfo(vap, bss->ni_chan);
2131 *(uint16_t *)frm = htole16(capinfo);
2134 *(uint16_t *)frm = htole16(arg); /* status */
2137 if (arg == IEEE80211_STATUS_SUCCESS) {
2138 *(uint16_t *)frm = htole16(ni->ni_associd);
2139 IEEE80211_NODE_STAT(ni, tx_assoc);
2141 IEEE80211_NODE_STAT(ni, tx_assoc_fail);
2144 frm = ieee80211_add_rates(frm, &ni->ni_rates);
2145 frm = ieee80211_add_xrates(frm, &ni->ni_rates);
2146 /* NB: respond according to what we received */
2147 if ((ni->ni_flags & HTFLAGS) == IEEE80211_NODE_HT) {
2148 frm = ieee80211_add_htcap(frm, ni);
2149 frm = ieee80211_add_htinfo(frm, ni);
2151 if ((vap->iv_flags & IEEE80211_F_WME) &&
2152 ni->ni_ies.wme_ie != NULL)
2153 frm = ieee80211_add_wme_param(frm, &ic->ic_wme);
2154 if ((ni->ni_flags & HTFLAGS) == HTFLAGS) {
2155 frm = ieee80211_add_htcap_vendor(frm, ni);
2156 frm = ieee80211_add_htinfo_vendor(frm, ni);
2158 #ifdef IEEE80211_SUPPORT_SUPERG
2159 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS))
2160 frm = ieee80211_add_ath(frm,
2161 IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS),
2162 ((vap->iv_flags & IEEE80211_F_WPA) == 0 &&
2163 ni->ni_authmode != IEEE80211_AUTH_8021X) ?
2164 vap->iv_def_txkey : IEEE80211_KEYIX_NONE);
2165 #endif /* IEEE80211_SUPPORT_SUPERG */
2166 if (vap->iv_appie_assocresp != NULL)
2167 frm = add_appie(frm, vap->iv_appie_assocresp);
2168 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2171 case IEEE80211_FC0_SUBTYPE_DISASSOC:
2172 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
2173 "send station disassociate (reason %d)", arg);
2174 m = ieee80211_getmgtframe(&frm,
2175 ic->ic_headroom + sizeof(struct ieee80211_frame),
2178 senderr(ENOMEM, is_tx_nobuf);
2179 *(uint16_t *)frm = htole16(arg); /* reason */
2180 m->m_pkthdr.len = m->m_len = sizeof(uint16_t);
2182 IEEE80211_NODE_STAT(ni, tx_disassoc);
2183 IEEE80211_NODE_STAT_SET(ni, tx_disassoc_code, arg);
2187 IEEE80211_NOTE(vap, IEEE80211_MSG_ANY, ni,
2188 "invalid mgmt frame type %u", type);
2189 senderr(EINVAL, is_tx_unknownmgt);
2193 /* NB: force non-ProbeResp frames to the highest queue */
2194 params.ibp_pri = WME_AC_VO;
2195 params.ibp_rate0 = bss->ni_txparms->mgmtrate;
2196 /* NB: we know all frames are unicast */
2197 params.ibp_try0 = bss->ni_txparms->maxretry;
2198 params.ibp_power = bss->ni_txpower;
2199 return ieee80211_mgmt_output(ni, m, type, ¶ms);
2201 ieee80211_free_node(ni);
2208 * Return an mbuf with a probe response frame in it.
2209 * Space is left to prepend and 802.11 header at the
2210 * front but it's left to the caller to fill in.
2213 ieee80211_alloc_proberesp(struct ieee80211_node *bss, int legacy)
2215 struct ieee80211vap *vap = bss->ni_vap;
2216 struct ieee80211com *ic = bss->ni_ic;
2217 const struct ieee80211_rateset *rs;
2223 * probe response frame format
2225 * [2] beacon interval
2226 * [2] cabability information
2228 * [tlv] supported rates
2229 * [tlv] parameter set (FH/DS)
2230 * [tlv] parameter set (IBSS)
2231 * [tlv] country (optional)
2232 * [3] power control (optional)
2233 * [5] channel switch announcement (CSA) (optional)
2234 * [tlv] extended rate phy (ERP)
2235 * [tlv] extended supported rates
2236 * [tlv] RSN (optional)
2237 * [tlv] HT capabilities
2238 * [tlv] HT information
2239 * [tlv] WPA (optional)
2240 * [tlv] WME (optional)
2241 * [tlv] Vendor OUI HT capabilities (optional)
2242 * [tlv] Vendor OUI HT information (optional)
2243 * [tlv] Atheros capabilities
2244 * [tlv] AppIE's (optional)
2245 * [tlv] Mesh ID (MBSS)
2246 * [tlv] Mesh Conf (MBSS)
2248 m = ieee80211_getmgtframe(&frm,
2249 ic->ic_headroom + sizeof(struct ieee80211_frame),
2253 + 2 + IEEE80211_NWID_LEN
2254 + 2 + IEEE80211_RATE_SIZE
2256 + IEEE80211_COUNTRY_MAX_SIZE
2258 + sizeof(struct ieee80211_csa_ie)
2260 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2261 + sizeof(struct ieee80211_ie_wpa)
2262 + sizeof(struct ieee80211_ie_htcap)
2263 + sizeof(struct ieee80211_ie_htinfo)
2264 + sizeof(struct ieee80211_ie_wpa)
2265 + sizeof(struct ieee80211_wme_param)
2266 + 4 + sizeof(struct ieee80211_ie_htcap)
2267 + 4 + sizeof(struct ieee80211_ie_htinfo)
2268 #ifdef IEEE80211_SUPPORT_SUPERG
2269 + sizeof(struct ieee80211_ath_ie)
2271 #ifdef IEEE80211_SUPPORT_MESH
2272 + 2 + IEEE80211_MESHID_LEN
2273 + sizeof(struct ieee80211_meshconf_ie)
2275 + (vap->iv_appie_proberesp != NULL ?
2276 vap->iv_appie_proberesp->ie_len : 0)
2279 vap->iv_stats.is_tx_nobuf++;
2283 memset(frm, 0, 8); /* timestamp should be filled later */
2285 *(uint16_t *)frm = htole16(bss->ni_intval);
2287 capinfo = ieee80211_getcapinfo(vap, bss->ni_chan);
2288 *(uint16_t *)frm = htole16(capinfo);
2291 frm = ieee80211_add_ssid(frm, bss->ni_essid, bss->ni_esslen);
2292 rs = ieee80211_get_suprates(ic, bss->ni_chan);
2293 frm = ieee80211_add_rates(frm, rs);
2295 if (IEEE80211_IS_CHAN_FHSS(bss->ni_chan)) {
2296 *frm++ = IEEE80211_ELEMID_FHPARMS;
2298 *frm++ = bss->ni_fhdwell & 0x00ff;
2299 *frm++ = (bss->ni_fhdwell >> 8) & 0x00ff;
2300 *frm++ = IEEE80211_FH_CHANSET(
2301 ieee80211_chan2ieee(ic, bss->ni_chan));
2302 *frm++ = IEEE80211_FH_CHANPAT(
2303 ieee80211_chan2ieee(ic, bss->ni_chan));
2304 *frm++ = bss->ni_fhindex;
2306 *frm++ = IEEE80211_ELEMID_DSPARMS;
2308 *frm++ = ieee80211_chan2ieee(ic, bss->ni_chan);
2311 if (vap->iv_opmode == IEEE80211_M_IBSS) {
2312 *frm++ = IEEE80211_ELEMID_IBSSPARMS;
2314 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */
2316 if ((vap->iv_flags & IEEE80211_F_DOTH) ||
2317 (vap->iv_flags_ext & IEEE80211_FEXT_DOTD))
2318 frm = ieee80211_add_countryie(frm, ic);
2319 if (vap->iv_flags & IEEE80211_F_DOTH) {
2320 if (IEEE80211_IS_CHAN_5GHZ(bss->ni_chan))
2321 frm = ieee80211_add_powerconstraint(frm, vap);
2322 if (ic->ic_flags & IEEE80211_F_CSAPENDING)
2323 frm = ieee80211_add_csa(frm, vap);
2325 if (IEEE80211_IS_CHAN_ANYG(bss->ni_chan))
2326 frm = ieee80211_add_erp(frm, ic);
2327 frm = ieee80211_add_xrates(frm, rs);
2328 if (vap->iv_flags & IEEE80211_F_WPA2) {
2329 if (vap->iv_rsn_ie != NULL)
2330 frm = add_ie(frm, vap->iv_rsn_ie);
2331 /* XXX else complain? */
2334 * NB: legacy 11b clients do not get certain ie's.
2335 * The caller identifies such clients by passing
2336 * a token in legacy to us. Could expand this to be
2337 * any legacy client for stuff like HT ie's.
2339 if (IEEE80211_IS_CHAN_HT(bss->ni_chan) &&
2340 legacy != IEEE80211_SEND_LEGACY_11B) {
2341 frm = ieee80211_add_htcap(frm, bss);
2342 frm = ieee80211_add_htinfo(frm, bss);
2344 if (vap->iv_flags & IEEE80211_F_WPA1) {
2345 if (vap->iv_wpa_ie != NULL)
2346 frm = add_ie(frm, vap->iv_wpa_ie);
2347 /* XXX else complain? */
2349 if (vap->iv_flags & IEEE80211_F_WME)
2350 frm = ieee80211_add_wme_param(frm, &ic->ic_wme);
2351 if (IEEE80211_IS_CHAN_HT(bss->ni_chan) &&
2352 (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) &&
2353 legacy != IEEE80211_SEND_LEGACY_11B) {
2354 frm = ieee80211_add_htcap_vendor(frm, bss);
2355 frm = ieee80211_add_htinfo_vendor(frm, bss);
2357 #ifdef IEEE80211_SUPPORT_SUPERG
2358 if ((vap->iv_flags & IEEE80211_F_ATHEROS) &&
2359 legacy != IEEE80211_SEND_LEGACY_11B)
2360 frm = ieee80211_add_athcaps(frm, bss);
2362 if (vap->iv_appie_proberesp != NULL)
2363 frm = add_appie(frm, vap->iv_appie_proberesp);
2364 #ifdef IEEE80211_SUPPORT_MESH
2365 if (vap->iv_opmode == IEEE80211_M_MBSS) {
2366 frm = ieee80211_add_meshid(frm, vap);
2367 frm = ieee80211_add_meshconf(frm, vap);
2370 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2376 * Send a probe response frame to the specified mac address.
2377 * This does not go through the normal mgt frame api so we
2378 * can specify the destination address and re-use the bss node
2379 * for the sta reference.
2382 ieee80211_send_proberesp(struct ieee80211vap *vap,
2383 const uint8_t da[IEEE80211_ADDR_LEN], int legacy)
2385 struct ieee80211_node *bss = vap->iv_bss;
2386 struct ieee80211com *ic = vap->iv_ic;
2388 #ifdef IEEE80211_DEBUG
2389 char ethstr[ETHER_ADDRSTRLEN + 1];
2392 if (vap->iv_state == IEEE80211_S_CAC) {
2393 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, bss,
2394 "block %s frame in CAC state", "probe response");
2395 vap->iv_stats.is_tx_badstate++;
2396 return EIO; /* XXX */
2400 * Hold a reference on the node so it doesn't go away until after
2401 * the xmit is complete all the way in the driver. On error we
2402 * will remove our reference.
2404 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2405 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n",
2406 __func__, __LINE__, bss, kether_ntoa(bss->ni_macaddr, ethstr),
2407 ieee80211_node_refcnt(bss)+1);
2408 ieee80211_ref_node(bss);
2410 m = ieee80211_alloc_proberesp(bss, legacy);
2412 ieee80211_free_node(bss);
2416 M_PREPEND(m, sizeof(struct ieee80211_frame), MB_DONTWAIT);
2417 KASSERT(m != NULL, ("no room for header"));
2419 ieee80211_send_setup(bss, m,
2420 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP,
2421 IEEE80211_NONQOS_TID, vap->iv_myaddr, da, bss->ni_bssid);
2422 /* XXX power management? */
2423 m->m_flags |= M_ENCAP; /* mark encapsulated */
2425 M_WME_SETAC(m, WME_AC_BE);
2427 IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS,
2428 "send probe resp on channel %u to %s%s\n",
2429 ieee80211_chan2ieee(ic, ic->ic_curchan), kether_ntoa(da, ethstr),
2430 legacy ? " <legacy>" : "");
2431 IEEE80211_NODE_STAT(bss, tx_mgmt);
2433 return ic->ic_raw_xmit(bss, m, NULL);
2437 * Allocate and build a RTS (Request To Send) control frame.
2440 ieee80211_alloc_rts(struct ieee80211com *ic,
2441 const uint8_t ra[IEEE80211_ADDR_LEN],
2442 const uint8_t ta[IEEE80211_ADDR_LEN],
2445 struct ieee80211_frame_rts *rts;
2448 /* XXX honor ic_headroom */
2449 m = m_gethdr(MB_DONTWAIT, MT_DATA);
2451 rts = mtod(m, struct ieee80211_frame_rts *);
2452 rts->i_fc[0] = IEEE80211_FC0_VERSION_0 |
2453 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_RTS;
2454 rts->i_fc[1] = IEEE80211_FC1_DIR_NODS;
2455 *(u_int16_t *)rts->i_dur = htole16(dur);
2456 IEEE80211_ADDR_COPY(rts->i_ra, ra);
2457 IEEE80211_ADDR_COPY(rts->i_ta, ta);
2459 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_rts);
2465 * Allocate and build a CTS (Clear To Send) control frame.
2468 ieee80211_alloc_cts(struct ieee80211com *ic,
2469 const uint8_t ra[IEEE80211_ADDR_LEN], uint16_t dur)
2471 struct ieee80211_frame_cts *cts;
2474 /* XXX honor ic_headroom */
2475 m = m_gethdr(MB_DONTWAIT, MT_DATA);
2477 cts = mtod(m, struct ieee80211_frame_cts *);
2478 cts->i_fc[0] = IEEE80211_FC0_VERSION_0 |
2479 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_CTS;
2480 cts->i_fc[1] = IEEE80211_FC1_DIR_NODS;
2481 *(u_int16_t *)cts->i_dur = htole16(dur);
2482 IEEE80211_ADDR_COPY(cts->i_ra, ra);
2484 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_cts);
2490 ieee80211_tx_mgt_timeout_callout(void *arg)
2492 struct ieee80211_node *ni = arg;
2493 struct ieee80211vap *vap;
2495 wlan_serialize_enter();
2497 if (vap->iv_state != IEEE80211_S_INIT &&
2498 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN) == 0) {
2500 * NB: it's safe to specify a timeout as the reason here;
2501 * it'll only be used in the right state.
2503 ieee80211_new_state(vap, IEEE80211_S_SCAN,
2504 IEEE80211_SCAN_FAIL_TIMEOUT);
2506 wlan_serialize_exit();
2510 ieee80211_tx_mgt_cb(struct ieee80211_node *ni, void *arg, int status)
2512 struct ieee80211vap *vap = ni->ni_vap;
2513 enum ieee80211_state ostate = (enum ieee80211_state) arg;
2516 * Frame transmit completed; arrange timer callback. If
2517 * transmit was successfuly we wait for response. Otherwise
2518 * we arrange an immediate callback instead of doing the
2519 * callback directly since we don't know what state the driver
2520 * is in (e.g. what locks it is holding). This work should
2521 * not be too time-critical and not happen too often so the
2522 * added overhead is acceptable.
2524 * XXX what happens if !acked but response shows up before callback?
2526 if (vap->iv_state == ostate)
2527 callout_reset(&vap->iv_mgtsend,
2528 status == 0 ? IEEE80211_TRANS_WAIT*hz : 0,
2529 ieee80211_tx_mgt_timeout_callout, ni);
2533 ieee80211_beacon_construct(struct mbuf *m, uint8_t *frm,
2534 struct ieee80211_beacon_offsets *bo, struct ieee80211_node *ni)
2536 struct ieee80211vap *vap = ni->ni_vap;
2537 struct ieee80211com *ic = ni->ni_ic;
2538 struct ieee80211_rateset *rs = &ni->ni_rates;
2542 * beacon frame format
2544 * [2] beacon interval
2545 * [2] cabability information
2547 * [tlv] supported rates
2548 * [3] parameter set (DS)
2549 * [8] CF parameter set (optional)
2550 * [tlv] parameter set (IBSS/TIM)
2551 * [tlv] country (optional)
2552 * [3] power control (optional)
2553 * [5] channel switch announcement (CSA) (optional)
2554 * [tlv] extended rate phy (ERP)
2555 * [tlv] extended supported rates
2556 * [tlv] RSN parameters
2557 * [tlv] HT capabilities
2558 * [tlv] HT information
2559 * XXX Vendor-specific OIDs (e.g. Atheros)
2560 * [tlv] WPA parameters
2561 * [tlv] WME parameters
2562 * [tlv] Vendor OUI HT capabilities (optional)
2563 * [tlv] Vendor OUI HT information (optional)
2564 * [tlv] Atheros capabilities (optional)
2565 * [tlv] TDMA parameters (optional)
2566 * [tlv] Mesh ID (MBSS)
2567 * [tlv] Mesh Conf (MBSS)
2568 * [tlv] application data (optional)
2571 memset(bo, 0, sizeof(*bo));
2573 memset(frm, 0, 8); /* XXX timestamp is set by hardware/driver */
2575 *(uint16_t *)frm = htole16(ni->ni_intval);
2577 capinfo = ieee80211_getcapinfo(vap, ni->ni_chan);
2578 bo->bo_caps = (uint16_t *)frm;
2579 *(uint16_t *)frm = htole16(capinfo);
2581 *frm++ = IEEE80211_ELEMID_SSID;
2582 if ((vap->iv_flags & IEEE80211_F_HIDESSID) == 0) {
2583 *frm++ = ni->ni_esslen;
2584 memcpy(frm, ni->ni_essid, ni->ni_esslen);
2585 frm += ni->ni_esslen;
2588 frm = ieee80211_add_rates(frm, rs);
2589 if (!IEEE80211_IS_CHAN_FHSS(ni->ni_chan)) {
2590 *frm++ = IEEE80211_ELEMID_DSPARMS;
2592 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan);
2594 if (ic->ic_flags & IEEE80211_F_PCF) {
2596 frm = ieee80211_add_cfparms(frm, ic);
2599 if (vap->iv_opmode == IEEE80211_M_IBSS) {
2600 *frm++ = IEEE80211_ELEMID_IBSSPARMS;
2602 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */
2604 } else if (vap->iv_opmode == IEEE80211_M_HOSTAP ||
2605 vap->iv_opmode == IEEE80211_M_MBSS) {
2606 /* TIM IE is the same for Mesh and Hostap */
2607 struct ieee80211_tim_ie *tie = (struct ieee80211_tim_ie *) frm;
2609 tie->tim_ie = IEEE80211_ELEMID_TIM;
2610 tie->tim_len = 4; /* length */
2611 tie->tim_count = 0; /* DTIM count */
2612 tie->tim_period = vap->iv_dtim_period; /* DTIM period */
2613 tie->tim_bitctl = 0; /* bitmap control */
2614 tie->tim_bitmap[0] = 0; /* Partial Virtual Bitmap */
2615 frm += sizeof(struct ieee80211_tim_ie);
2618 bo->bo_tim_trailer = frm;
2619 if ((vap->iv_flags & IEEE80211_F_DOTH) ||
2620 (vap->iv_flags_ext & IEEE80211_FEXT_DOTD))
2621 frm = ieee80211_add_countryie(frm, ic);
2622 if (vap->iv_flags & IEEE80211_F_DOTH) {
2623 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan))
2624 frm = ieee80211_add_powerconstraint(frm, vap);
2626 if (ic->ic_flags & IEEE80211_F_CSAPENDING)
2627 frm = ieee80211_add_csa(frm, vap);
2630 if (IEEE80211_IS_CHAN_ANYG(ni->ni_chan)) {
2632 frm = ieee80211_add_erp(frm, ic);
2634 frm = ieee80211_add_xrates(frm, rs);
2635 if (vap->iv_flags & IEEE80211_F_WPA2) {
2636 if (vap->iv_rsn_ie != NULL)
2637 frm = add_ie(frm, vap->iv_rsn_ie);
2638 /* XXX else complain */
2640 if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) {
2641 frm = ieee80211_add_htcap(frm, ni);
2642 bo->bo_htinfo = frm;
2643 frm = ieee80211_add_htinfo(frm, ni);
2645 if (vap->iv_flags & IEEE80211_F_WPA1) {
2646 if (vap->iv_wpa_ie != NULL)
2647 frm = add_ie(frm, vap->iv_wpa_ie);
2648 /* XXX else complain */
2650 if (vap->iv_flags & IEEE80211_F_WME) {
2652 frm = ieee80211_add_wme_param(frm, &ic->ic_wme);
2654 if (IEEE80211_IS_CHAN_HT(ni->ni_chan) &&
2655 (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT)) {
2656 frm = ieee80211_add_htcap_vendor(frm, ni);
2657 frm = ieee80211_add_htinfo_vendor(frm, ni);
2659 #ifdef IEEE80211_SUPPORT_SUPERG
2660 if (vap->iv_flags & IEEE80211_F_ATHEROS) {
2662 frm = ieee80211_add_athcaps(frm, ni);
2665 #ifdef IEEE80211_SUPPORT_TDMA
2666 if (vap->iv_caps & IEEE80211_C_TDMA) {
2668 frm = ieee80211_add_tdma(frm, vap);
2671 if (vap->iv_appie_beacon != NULL) {
2673 bo->bo_appie_len = vap->iv_appie_beacon->ie_len;
2674 frm = add_appie(frm, vap->iv_appie_beacon);
2676 #ifdef IEEE80211_SUPPORT_MESH
2677 if (vap->iv_opmode == IEEE80211_M_MBSS) {
2678 frm = ieee80211_add_meshid(frm, vap);
2679 bo->bo_meshconf = frm;
2680 frm = ieee80211_add_meshconf(frm, vap);
2683 bo->bo_tim_trailer_len = frm - bo->bo_tim_trailer;
2684 bo->bo_csa_trailer_len = frm - bo->bo_csa;
2685 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2689 * Allocate a beacon frame and fillin the appropriate bits.
2692 ieee80211_beacon_alloc(struct ieee80211_node *ni,
2693 struct ieee80211_beacon_offsets *bo)
2695 struct ieee80211vap *vap = ni->ni_vap;
2696 struct ieee80211com *ic = ni->ni_ic;
2697 struct ifnet *ifp = vap->iv_ifp;
2698 struct ieee80211_frame *wh;
2704 * beacon frame format
2706 * [2] beacon interval
2707 * [2] cabability information
2709 * [tlv] supported rates
2710 * [3] parameter set (DS)
2711 * [8] CF parameter set (optional)
2712 * [tlv] parameter set (IBSS/TIM)
2713 * [tlv] country (optional)
2714 * [3] power control (optional)
2715 * [5] channel switch announcement (CSA) (optional)
2716 * [tlv] extended rate phy (ERP)
2717 * [tlv] extended supported rates
2718 * [tlv] RSN parameters
2719 * [tlv] HT capabilities
2720 * [tlv] HT information
2721 * [tlv] Vendor OUI HT capabilities (optional)
2722 * [tlv] Vendor OUI HT information (optional)
2723 * XXX Vendor-specific OIDs (e.g. Atheros)
2724 * [tlv] WPA parameters
2725 * [tlv] WME parameters
2726 * [tlv] TDMA parameters (optional)
2727 * [tlv] Mesh ID (MBSS)
2728 * [tlv] Mesh Conf (MBSS)
2729 * [tlv] application data (optional)
2730 * NB: we allocate the max space required for the TIM bitmap.
2731 * XXX how big is this?
2733 pktlen = 8 /* time stamp */
2734 + sizeof(uint16_t) /* beacon interval */
2735 + sizeof(uint16_t) /* capabilities */
2736 + 2 + ni->ni_esslen /* ssid */
2737 + 2 + IEEE80211_RATE_SIZE /* supported rates */
2738 + 2 + 1 /* DS parameters */
2739 + 2 + 6 /* CF parameters */
2740 + 2 + 4 + vap->iv_tim_len /* DTIM/IBSSPARMS */
2741 + IEEE80211_COUNTRY_MAX_SIZE /* country */
2742 + 2 + 1 /* power control */
2743 + sizeof(struct ieee80211_csa_ie) /* CSA */
2745 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2746 + (vap->iv_caps & IEEE80211_C_WPA ? /* WPA 1+2 */
2747 2*sizeof(struct ieee80211_ie_wpa) : 0)
2748 /* XXX conditional? */
2749 + 4+2*sizeof(struct ieee80211_ie_htcap)/* HT caps */
2750 + 4+2*sizeof(struct ieee80211_ie_htinfo)/* HT info */
2751 + (vap->iv_caps & IEEE80211_C_WME ? /* WME */
2752 sizeof(struct ieee80211_wme_param) : 0)
2753 #ifdef IEEE80211_SUPPORT_SUPERG
2754 + sizeof(struct ieee80211_ath_ie) /* ATH */
2756 #ifdef IEEE80211_SUPPORT_TDMA
2757 + (vap->iv_caps & IEEE80211_C_TDMA ? /* TDMA */
2758 sizeof(struct ieee80211_tdma_param) : 0)
2760 #ifdef IEEE80211_SUPPORT_MESH
2761 + 2 + ni->ni_meshidlen
2762 + sizeof(struct ieee80211_meshconf_ie)
2764 + IEEE80211_MAX_APPIE
2766 m = ieee80211_getmgtframe(&frm,
2767 ic->ic_headroom + sizeof(struct ieee80211_frame), pktlen);
2769 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
2770 "%s: cannot get buf; size %u\n", __func__, pktlen);
2771 vap->iv_stats.is_tx_nobuf++;
2774 ieee80211_beacon_construct(m, frm, bo, ni);
2776 M_PREPEND(m, sizeof(struct ieee80211_frame), MB_DONTWAIT);
2777 KASSERT(m != NULL, ("no space for 802.11 header?"));
2778 wh = mtod(m, struct ieee80211_frame *);
2779 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT |
2780 IEEE80211_FC0_SUBTYPE_BEACON;
2781 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
2782 *(uint16_t *)wh->i_dur = 0;
2783 IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr);
2784 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
2785 IEEE80211_ADDR_COPY(wh->i_addr3, ni->ni_bssid);
2786 *(uint16_t *)wh->i_seq = 0;
2792 * Update the dynamic parts of a beacon frame based on the current state.
2795 ieee80211_beacon_update(struct ieee80211_node *ni,
2796 struct ieee80211_beacon_offsets *bo, struct mbuf *m, int mcast)
2798 struct ieee80211vap *vap = ni->ni_vap;
2799 struct ieee80211com *ic = ni->ni_ic;
2800 int len_changed = 0;
2804 * Handle 11h channel change when we've reached the count.
2805 * We must recalculate the beacon frame contents to account
2806 * for the new channel. Note we do this only for the first
2807 * vap that reaches this point; subsequent vaps just update
2808 * their beacon state to reflect the recalculated channel.
2810 if (isset(bo->bo_flags, IEEE80211_BEACON_CSA) &&
2811 vap->iv_csa_count == ic->ic_csa_count) {
2812 vap->iv_csa_count = 0;
2814 * Effect channel change before reconstructing the beacon
2815 * frame contents as many places reference ni_chan.
2817 if (ic->ic_csa_newchan != NULL)
2818 ieee80211_csa_completeswitch(ic);
2820 * NB: ieee80211_beacon_construct clears all pending
2821 * updates in bo_flags so we don't need to explicitly
2822 * clear IEEE80211_BEACON_CSA.
2824 ieee80211_beacon_construct(m,
2825 mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), bo, ni);
2827 /* XXX do WME aggressive mode processing? */
2828 return 1; /* just assume length changed */
2831 /* XXX faster to recalculate entirely or just changes? */
2832 capinfo = ieee80211_getcapinfo(vap, ni->ni_chan);
2833 *bo->bo_caps = htole16(capinfo);
2835 if (vap->iv_flags & IEEE80211_F_WME) {
2836 struct ieee80211_wme_state *wme = &ic->ic_wme;
2839 * Check for agressive mode change. When there is
2840 * significant high priority traffic in the BSS
2841 * throttle back BE traffic by using conservative
2842 * parameters. Otherwise BE uses agressive params
2843 * to optimize performance of legacy/non-QoS traffic.
2845 if (wme->wme_flags & WME_F_AGGRMODE) {
2846 if (wme->wme_hipri_traffic >
2847 wme->wme_hipri_switch_thresh) {
2848 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
2849 "%s: traffic %u, disable aggressive mode\n",
2850 __func__, wme->wme_hipri_traffic);
2851 wme->wme_flags &= ~WME_F_AGGRMODE;
2852 ieee80211_wme_updateparams_locked(vap);
2853 wme->wme_hipri_traffic =
2854 wme->wme_hipri_switch_hysteresis;
2856 wme->wme_hipri_traffic = 0;
2858 if (wme->wme_hipri_traffic <=
2859 wme->wme_hipri_switch_thresh) {
2860 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
2861 "%s: traffic %u, enable aggressive mode\n",
2862 __func__, wme->wme_hipri_traffic);
2863 wme->wme_flags |= WME_F_AGGRMODE;
2864 ieee80211_wme_updateparams_locked(vap);
2865 wme->wme_hipri_traffic = 0;
2867 wme->wme_hipri_traffic =
2868 wme->wme_hipri_switch_hysteresis;
2870 if (isset(bo->bo_flags, IEEE80211_BEACON_WME)) {
2871 (void) ieee80211_add_wme_param(bo->bo_wme, wme);
2872 clrbit(bo->bo_flags, IEEE80211_BEACON_WME);
2876 if (isset(bo->bo_flags, IEEE80211_BEACON_HTINFO)) {
2877 ieee80211_ht_update_beacon(vap, bo);
2878 clrbit(bo->bo_flags, IEEE80211_BEACON_HTINFO);
2880 #ifdef IEEE80211_SUPPORT_TDMA
2881 if (vap->iv_caps & IEEE80211_C_TDMA) {
2883 * NB: the beacon is potentially updated every TBTT.
2885 ieee80211_tdma_update_beacon(vap, bo);
2888 #ifdef IEEE80211_SUPPORT_MESH
2889 if (vap->iv_opmode == IEEE80211_M_MBSS)
2890 ieee80211_mesh_update_beacon(vap, bo);
2893 if (vap->iv_opmode == IEEE80211_M_HOSTAP ||
2894 vap->iv_opmode == IEEE80211_M_MBSS) { /* NB: no IBSS support*/
2895 struct ieee80211_tim_ie *tie =
2896 (struct ieee80211_tim_ie *) bo->bo_tim;
2897 if (isset(bo->bo_flags, IEEE80211_BEACON_TIM)) {
2898 u_int timlen, timoff, i;
2900 * ATIM/DTIM needs updating. If it fits in the
2901 * current space allocated then just copy in the
2902 * new bits. Otherwise we need to move any trailing
2903 * data to make room. Note that we know there is
2904 * contiguous space because ieee80211_beacon_allocate
2905 * insures there is space in the mbuf to write a
2906 * maximal-size virtual bitmap (based on iv_max_aid).
2909 * Calculate the bitmap size and offset, copy any
2910 * trailer out of the way, and then copy in the
2911 * new bitmap and update the information element.
2912 * Note that the tim bitmap must contain at least
2913 * one byte and any offset must be even.
2915 if (vap->iv_ps_pending != 0) {
2916 timoff = 128; /* impossibly large */
2917 for (i = 0; i < vap->iv_tim_len; i++)
2918 if (vap->iv_tim_bitmap[i]) {
2922 KASSERT(timoff != 128, ("tim bitmap empty!"));
2923 for (i = vap->iv_tim_len-1; i >= timoff; i--)
2924 if (vap->iv_tim_bitmap[i])
2926 timlen = 1 + (i - timoff);
2931 if (timlen != bo->bo_tim_len) {
2932 /* copy up/down trailer */
2933 int adjust = tie->tim_bitmap+timlen
2934 - bo->bo_tim_trailer;
2935 ovbcopy(bo->bo_tim_trailer,
2936 bo->bo_tim_trailer+adjust,
2937 bo->bo_tim_trailer_len);
2938 bo->bo_tim_trailer += adjust;
2939 bo->bo_erp += adjust;
2940 bo->bo_htinfo += adjust;
2941 #ifdef IEEE80211_SUPERG_SUPPORT
2942 bo->bo_ath += adjust;
2944 #ifdef IEEE80211_TDMA_SUPPORT
2945 bo->bo_tdma += adjust;
2947 #ifdef IEEE80211_MESH_SUPPORT
2948 bo->bo_meshconf += adjust;
2950 bo->bo_appie += adjust;
2951 bo->bo_wme += adjust;
2952 bo->bo_csa += adjust;
2953 bo->bo_tim_len = timlen;
2955 /* update information element */
2956 tie->tim_len = 3 + timlen;
2957 tie->tim_bitctl = timoff;
2960 memcpy(tie->tim_bitmap, vap->iv_tim_bitmap + timoff,
2963 clrbit(bo->bo_flags, IEEE80211_BEACON_TIM);
2965 IEEE80211_DPRINTF(vap, IEEE80211_MSG_POWER,
2966 "%s: TIM updated, pending %u, off %u, len %u\n",
2967 __func__, vap->iv_ps_pending, timoff, timlen);
2969 /* count down DTIM period */
2970 if (tie->tim_count == 0)
2971 tie->tim_count = tie->tim_period - 1;
2974 /* update state for buffered multicast frames on DTIM */
2975 if (mcast && tie->tim_count == 0)
2976 tie->tim_bitctl |= 1;
2978 tie->tim_bitctl &= ~1;
2979 if (isset(bo->bo_flags, IEEE80211_BEACON_CSA)) {
2980 struct ieee80211_csa_ie *csa =
2981 (struct ieee80211_csa_ie *) bo->bo_csa;
2984 * Insert or update CSA ie. If we're just starting
2985 * to count down to the channel switch then we need
2986 * to insert the CSA ie. Otherwise we just need to
2987 * drop the count. The actual change happens above
2988 * when the vap's count reaches the target count.
2990 if (vap->iv_csa_count == 0) {
2991 memmove(&csa[1], csa, bo->bo_csa_trailer_len);
2992 bo->bo_erp += sizeof(*csa);
2993 bo->bo_htinfo += sizeof(*csa);
2994 bo->bo_wme += sizeof(*csa);
2995 #ifdef IEEE80211_SUPERG_SUPPORT
2996 bo->bo_ath += sizeof(*csa);
2998 #ifdef IEEE80211_TDMA_SUPPORT
2999 bo->bo_tdma += sizeof(*csa);
3001 #ifdef IEEE80211_MESH_SUPPORT
3002 bo->bo_meshconf += sizeof(*csa);
3004 bo->bo_appie += sizeof(*csa);
3005 bo->bo_csa_trailer_len += sizeof(*csa);
3006 bo->bo_tim_trailer_len += sizeof(*csa);
3007 m->m_len += sizeof(*csa);
3008 m->m_pkthdr.len += sizeof(*csa);
3010 ieee80211_add_csa(bo->bo_csa, vap);
3013 vap->iv_csa_count++;
3014 /* NB: don't clear IEEE80211_BEACON_CSA */
3016 if (isset(bo->bo_flags, IEEE80211_BEACON_ERP)) {
3018 * ERP element needs updating.
3020 (void) ieee80211_add_erp(bo->bo_erp, ic);
3021 clrbit(bo->bo_flags, IEEE80211_BEACON_ERP);
3023 #ifdef IEEE80211_SUPPORT_SUPERG
3024 if (isset(bo->bo_flags, IEEE80211_BEACON_ATH)) {
3025 ieee80211_add_athcaps(bo->bo_ath, ni);
3026 clrbit(bo->bo_flags, IEEE80211_BEACON_ATH);
3030 if (isset(bo->bo_flags, IEEE80211_BEACON_APPIE)) {
3031 const struct ieee80211_appie *aie = vap->iv_appie_beacon;
3037 aielen += aie->ie_len;
3038 if (aielen != bo->bo_appie_len) {
3039 /* copy up/down trailer */
3040 int adjust = aielen - bo->bo_appie_len;
3041 ovbcopy(bo->bo_tim_trailer, bo->bo_tim_trailer+adjust,
3042 bo->bo_tim_trailer_len);
3043 bo->bo_tim_trailer += adjust;
3044 bo->bo_appie += adjust;
3045 bo->bo_appie_len = aielen;
3051 frm = add_appie(frm, aie);
3052 clrbit(bo->bo_flags, IEEE80211_BEACON_APPIE);