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 $
31 #include "opt_inet6.h"
34 #include <sys/param.h>
35 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #include <sys/endian.h>
40 #include <sys/socket.h>
43 #include <net/ethernet.h>
44 #include <net/route.h>
46 #include <net/if_llc.h>
47 #include <net/if_media.h>
48 #include <net/ifq_var.h>
50 #include <netproto/802_11/ieee80211_var.h>
51 #include <netproto/802_11/ieee80211_regdomain.h>
52 #ifdef IEEE80211_SUPPORT_SUPERG
53 #include <netproto/802_11/ieee80211_superg.h>
55 #ifdef IEEE80211_SUPPORT_TDMA
56 #include <netproto/802_11/ieee80211_tdma.h>
58 #include <netproto/802_11/ieee80211_wds.h>
59 #include <netproto/802_11/ieee80211_mesh.h>
62 #include <netinet/in.h>
63 #include <netinet/if_ether.h>
64 #include <netinet/in_systm.h>
65 #include <netinet/ip.h>
68 #include <netinet/ip6.h>
71 #define ETHER_HEADER_COPY(dst, src) \
72 memcpy(dst, src, sizeof(struct ether_header))
74 /* unalligned little endian access */
75 #define LE_WRITE_2(p, v) do { \
76 ((uint8_t *)(p))[0] = (v) & 0xff; \
77 ((uint8_t *)(p))[1] = ((v) >> 8) & 0xff; \
79 #define LE_WRITE_4(p, v) do { \
80 ((uint8_t *)(p))[0] = (v) & 0xff; \
81 ((uint8_t *)(p))[1] = ((v) >> 8) & 0xff; \
82 ((uint8_t *)(p))[2] = ((v) >> 16) & 0xff; \
83 ((uint8_t *)(p))[3] = ((v) >> 24) & 0xff; \
86 static int ieee80211_fragment(struct ieee80211vap *, struct mbuf *,
87 u_int hdrsize, u_int ciphdrsize, u_int mtu);
88 static void ieee80211_tx_mgt_cb(struct ieee80211_node *, void *, int);
90 #ifdef IEEE80211_DEBUG
92 * Decide if an outbound management frame should be
93 * printed when debugging is enabled. This filters some
94 * of the less interesting frames that come frequently
98 doprint(struct ieee80211vap *vap, int subtype)
101 case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
102 return (vap->iv_opmode == IEEE80211_M_IBSS);
109 * Start method for vap's. All packets from the stack come
110 * through here. We handle common processing of the packets
111 * before dispatching them to the underlying device.
114 ieee80211_start(struct ifnet *ifp)
116 #define IS_DWDS(vap) \
117 (vap->iv_opmode == IEEE80211_M_WDS && \
118 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0)
119 struct ieee80211vap *vap = ifp->if_softc;
120 struct ieee80211com *ic = vap->iv_ic;
121 struct ifnet *parent = ic->ic_ifp;
122 struct ieee80211_node *ni;
124 struct ether_header *eh;
127 /* NB: parent must be up and running */
128 if (!IFNET_IS_UP_RUNNING(parent)) {
129 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
130 "%s: ignore queue, parent %s not up+running\n",
131 __func__, parent->if_xname);
135 if (vap->iv_state == IEEE80211_S_SLEEP) {
137 * In power save, wakeup device for transmit.
139 ieee80211_new_state(vap, IEEE80211_S_RUN, 0);
143 * No data frames go out unless we're running.
144 * Note in particular this covers CAC and CSA
145 * states (though maybe we should check muting
148 if (vap->iv_state != IEEE80211_S_RUN) {
150 /* re-check under the com lock to avoid races */
151 if (vap->iv_state != IEEE80211_S_RUN) {
152 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
153 "%s: ignore queue, in %s state\n",
154 __func__, ieee80211_state_name[vap->iv_state]);
155 vap->iv_stats.is_tx_badstate++;
156 ifp->if_flags |= IFF_OACTIVE;
157 IEEE80211_UNLOCK(ic);
160 IEEE80211_UNLOCK(ic);
163 ifq_dequeue(&ifp->if_snd, m);
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 */
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 */
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++;
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++;
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).
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++;
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 = parent->if_transmit(parent, m);
363 /* NB: IFQ_HANDOFF reclaims mbuf */
364 ieee80211_free_node(ni);
368 ic->ic_lastdata = ticks;
374 * 802.11 output routine. This is (currently) used only to
375 * connect bpf write calls to the 802.11 layer for injecting
379 ieee80211_output(struct ifnet *ifp, struct mbuf *m,
380 struct sockaddr *dst, struct rtentry *rt)
382 #define senderr(e) do { error = (e); goto bad;} while (0)
383 struct ieee80211_node *ni = NULL;
384 struct ieee80211vap *vap;
385 struct ieee80211_frame *wh;
388 if (ifp->if_flags & IFF_OACTIVE) {
390 * Short-circuit requests if the vap is marked OACTIVE
391 * as this can happen because a packet came down through
392 * ieee80211_start before the vap entered RUN state in
393 * which case it's ok to just drop the frame. This
394 * should not be necessary but callers of if_output don't
401 * Hand to the 802.3 code if not tagged as
402 * a raw 802.11 frame.
404 if (dst->sa_family != AF_IEEE80211)
405 return vap->iv_output(ifp, m, dst, rt);
407 error = mac_ifnet_check_transmit(ifp, m);
411 if (ifp->if_flags & IFF_MONITOR)
413 if (!IFNET_IS_UP_RUNNING(ifp))
415 if (vap->iv_state == IEEE80211_S_CAC) {
416 IEEE80211_DPRINTF(vap,
417 IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH,
418 "block %s frame in CAC state\n", "raw data");
419 vap->iv_stats.is_tx_badstate++;
420 senderr(EIO); /* XXX */
422 /* XXX bypass bridge, pfil, carp, etc. */
424 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_ack))
425 senderr(EIO); /* XXX */
426 wh = mtod(m, struct ieee80211_frame *);
427 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
428 IEEE80211_FC0_VERSION_0)
429 senderr(EIO); /* XXX */
431 /* locate destination node */
432 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) {
433 case IEEE80211_FC1_DIR_NODS:
434 case IEEE80211_FC1_DIR_FROMDS:
435 ni = ieee80211_find_txnode(vap, wh->i_addr1);
437 case IEEE80211_FC1_DIR_TODS:
438 case IEEE80211_FC1_DIR_DSTODS:
439 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame))
440 senderr(EIO); /* XXX */
441 ni = ieee80211_find_txnode(vap, wh->i_addr3);
444 senderr(EIO); /* XXX */
448 * Permit packets w/ bpf params through regardless
449 * (see below about sa_len).
451 if (dst->sa_len == 0)
452 senderr(EHOSTUNREACH);
453 ni = ieee80211_ref_node(vap->iv_bss);
457 * Sanitize mbuf for net80211 flags leaked from above.
459 * NB: This must be done before ieee80211_classify as
460 * it marks EAPOL in frames with M_EAPOL.
462 m->m_flags &= ~M_80211_TX;
464 /* calculate priority so drivers can find the tx queue */
465 /* XXX assumes an 802.3 frame */
466 if (ieee80211_classify(ni, m))
467 senderr(EIO); /* XXX */
470 IEEE80211_NODE_STAT(ni, tx_data);
471 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
472 IEEE80211_NODE_STAT(ni, tx_mcast);
473 m->m_flags |= M_MCAST;
475 IEEE80211_NODE_STAT(ni, tx_ucast);
476 /* NB: ieee80211_encap does not include 802.11 header */
477 IEEE80211_NODE_STAT_ADD(ni, tx_bytes, m->m_pkthdr.len);
480 * NB: DLT_IEEE802_11_RADIO identifies the parameters are
481 * present by setting the sa_len field of the sockaddr (yes,
483 * NB: we assume sa_data is suitably aligned to cast.
485 return vap->iv_ic->ic_raw_xmit(ni, m,
486 (const struct ieee80211_bpf_params *)(dst->sa_len ?
487 dst->sa_data : NULL));
492 ieee80211_free_node(ni);
499 * Set the direction field and address fields of an outgoing
500 * frame. Note this should be called early on in constructing
501 * a frame as it sets i_fc[1]; other bits can then be or'd in.
504 ieee80211_send_setup(
505 struct ieee80211_node *ni,
508 const uint8_t sa[IEEE80211_ADDR_LEN],
509 const uint8_t da[IEEE80211_ADDR_LEN],
510 const uint8_t bssid[IEEE80211_ADDR_LEN])
512 #define WH4(wh) ((struct ieee80211_frame_addr4 *)wh)
513 struct ieee80211vap *vap = ni->ni_vap;
514 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
517 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | type;
518 if ((type & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_DATA) {
519 switch (vap->iv_opmode) {
520 case IEEE80211_M_STA:
521 wh->i_fc[1] = IEEE80211_FC1_DIR_TODS;
522 IEEE80211_ADDR_COPY(wh->i_addr1, bssid);
523 IEEE80211_ADDR_COPY(wh->i_addr2, sa);
524 IEEE80211_ADDR_COPY(wh->i_addr3, da);
526 case IEEE80211_M_IBSS:
527 case IEEE80211_M_AHDEMO:
528 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
529 IEEE80211_ADDR_COPY(wh->i_addr1, da);
530 IEEE80211_ADDR_COPY(wh->i_addr2, sa);
531 IEEE80211_ADDR_COPY(wh->i_addr3, bssid);
533 case IEEE80211_M_HOSTAP:
534 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
535 IEEE80211_ADDR_COPY(wh->i_addr1, da);
536 IEEE80211_ADDR_COPY(wh->i_addr2, bssid);
537 IEEE80211_ADDR_COPY(wh->i_addr3, sa);
539 case IEEE80211_M_WDS:
540 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS;
541 IEEE80211_ADDR_COPY(wh->i_addr1, da);
542 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
543 IEEE80211_ADDR_COPY(wh->i_addr3, da);
544 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa);
546 case IEEE80211_M_MBSS:
547 #ifdef IEEE80211_SUPPORT_MESH
548 /* XXX add support for proxied addresses */
549 if (IEEE80211_IS_MULTICAST(da)) {
550 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
552 IEEE80211_ADDR_COPY(wh->i_addr1, da);
553 IEEE80211_ADDR_COPY(wh->i_addr2,
556 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS;
557 IEEE80211_ADDR_COPY(wh->i_addr1, da);
558 IEEE80211_ADDR_COPY(wh->i_addr2,
560 IEEE80211_ADDR_COPY(wh->i_addr3, da);
561 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa);
565 case IEEE80211_M_MONITOR: /* NB: to quiet compiler */
569 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
570 IEEE80211_ADDR_COPY(wh->i_addr1, da);
571 IEEE80211_ADDR_COPY(wh->i_addr2, sa);
572 #ifdef IEEE80211_SUPPORT_MESH
573 if (vap->iv_opmode == IEEE80211_M_MBSS)
574 IEEE80211_ADDR_COPY(wh->i_addr3, sa);
577 IEEE80211_ADDR_COPY(wh->i_addr3, bssid);
579 *(uint16_t *)&wh->i_dur[0] = 0;
581 seqno = ni->ni_txseqs[tid]++;
582 *(uint16_t *)&wh->i_seq[0] = htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
583 M_SEQNO_SET(m, seqno);
585 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
586 m->m_flags |= M_MCAST;
591 * Send a management frame to the specified node. The node pointer
592 * must have a reference as the pointer will be passed to the driver
593 * and potentially held for a long time. If the frame is successfully
594 * dispatched to the driver, then it is responsible for freeing the
595 * reference (and potentially free'ing up any associated storage);
596 * otherwise deal with reclaiming any reference (on error).
599 ieee80211_mgmt_output(struct ieee80211_node *ni, struct mbuf *m, int type,
600 struct ieee80211_bpf_params *params)
602 struct ieee80211vap *vap = ni->ni_vap;
603 struct ieee80211com *ic = ni->ni_ic;
604 struct ieee80211_frame *wh;
606 KASSERT(ni != NULL, ("null node"));
608 if (vap->iv_state == IEEE80211_S_CAC) {
609 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH,
610 ni, "block %s frame in CAC state",
611 ieee80211_mgt_subtype_name[
612 (type & IEEE80211_FC0_SUBTYPE_MASK) >>
613 IEEE80211_FC0_SUBTYPE_SHIFT]);
614 vap->iv_stats.is_tx_badstate++;
615 ieee80211_free_node(ni);
617 return EIO; /* XXX */
620 M_PREPEND(m, sizeof(struct ieee80211_frame), MB_DONTWAIT);
622 ieee80211_free_node(ni);
626 wh = mtod(m, struct ieee80211_frame *);
627 ieee80211_send_setup(ni, m,
628 IEEE80211_FC0_TYPE_MGT | type, IEEE80211_NONQOS_TID,
629 vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid);
630 if (params->ibp_flags & IEEE80211_BPF_CRYPTO) {
631 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr1,
632 "encrypting frame (%s)", __func__);
633 wh->i_fc[1] |= IEEE80211_FC1_WEP;
635 m->m_flags |= M_ENCAP; /* mark encapsulated */
637 KASSERT(type != IEEE80211_FC0_SUBTYPE_PROBE_RESP, ("probe response?"));
638 M_WME_SETAC(m, params->ibp_pri);
640 #ifdef IEEE80211_DEBUG
641 /* avoid printing too many frames */
642 if ((ieee80211_msg_debug(vap) && doprint(vap, type)) ||
643 ieee80211_msg_dumppkts(vap)) {
644 kprintf("[%6D] send %s on channel %u\n",
646 ieee80211_mgt_subtype_name[
647 (type & IEEE80211_FC0_SUBTYPE_MASK) >>
648 IEEE80211_FC0_SUBTYPE_SHIFT],
649 ieee80211_chan2ieee(ic, ic->ic_curchan));
652 IEEE80211_NODE_STAT(ni, tx_mgmt);
654 return ic->ic_raw_xmit(ni, m, params);
658 * Send a null data frame to the specified node. If the station
659 * is setup for QoS then a QoS Null Data frame is constructed.
660 * If this is a WDS station then a 4-address frame is constructed.
662 * NB: the caller is assumed to have setup a node reference
663 * for use; this is necessary to deal with a race condition
664 * when probing for inactive stations. Like ieee80211_mgmt_output
665 * we must cleanup any node reference on error; however we
666 * can safely just unref it as we know it will never be the
667 * last reference to the node.
670 ieee80211_send_nulldata(struct ieee80211_node *ni)
672 struct ieee80211vap *vap = ni->ni_vap;
673 struct ieee80211com *ic = ni->ni_ic;
675 struct ieee80211_frame *wh;
679 if (vap->iv_state == IEEE80211_S_CAC) {
680 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH,
681 ni, "block %s frame in CAC state", "null data");
682 ieee80211_unref_node(&ni);
683 vap->iv_stats.is_tx_badstate++;
684 return EIO; /* XXX */
687 if (ni->ni_flags & (IEEE80211_NODE_QOS|IEEE80211_NODE_HT))
688 hdrlen = sizeof(struct ieee80211_qosframe);
690 hdrlen = sizeof(struct ieee80211_frame);
691 /* NB: only WDS vap's get 4-address frames */
692 if (vap->iv_opmode == IEEE80211_M_WDS)
693 hdrlen += IEEE80211_ADDR_LEN;
694 if (ic->ic_flags & IEEE80211_F_DATAPAD)
695 hdrlen = roundup(hdrlen, sizeof(uint32_t));
697 m = ieee80211_getmgtframe(&frm, ic->ic_headroom + hdrlen, 0);
700 ieee80211_unref_node(&ni);
701 vap->iv_stats.is_tx_nobuf++;
704 KASSERT(M_LEADINGSPACE(m) >= hdrlen,
705 ("leading space %zd", M_LEADINGSPACE(m)));
706 M_PREPEND(m, hdrlen, MB_DONTWAIT);
708 /* NB: cannot happen */
709 ieee80211_free_node(ni);
713 wh = mtod(m, struct ieee80211_frame *); /* NB: a little lie */
714 if (ni->ni_flags & IEEE80211_NODE_QOS) {
715 const int tid = WME_AC_TO_TID(WME_AC_BE);
718 ieee80211_send_setup(ni, m,
719 IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_QOS_NULL,
720 tid, vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid);
722 if (vap->iv_opmode == IEEE80211_M_WDS)
723 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos;
725 qos = ((struct ieee80211_qosframe *) wh)->i_qos;
726 qos[0] = tid & IEEE80211_QOS_TID;
727 if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[WME_AC_BE].wmep_noackPolicy)
728 qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK;
731 ieee80211_send_setup(ni, m,
732 IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_NODATA,
733 IEEE80211_NONQOS_TID,
734 vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid);
736 if (vap->iv_opmode != IEEE80211_M_WDS) {
737 /* NB: power management bit is never sent by an AP */
738 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) &&
739 vap->iv_opmode != IEEE80211_M_HOSTAP)
740 wh->i_fc[1] |= IEEE80211_FC1_PWR_MGT;
742 m->m_len = m->m_pkthdr.len = hdrlen;
743 m->m_flags |= M_ENCAP; /* mark encapsulated */
745 M_WME_SETAC(m, WME_AC_BE);
747 IEEE80211_NODE_STAT(ni, tx_data);
749 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, ni,
750 "send %snull data frame on channel %u, pwr mgt %s",
751 ni->ni_flags & IEEE80211_NODE_QOS ? "QoS " : "",
752 ieee80211_chan2ieee(ic, ic->ic_curchan),
753 wh->i_fc[1] & IEEE80211_FC1_PWR_MGT ? "ena" : "dis");
755 return ic->ic_raw_xmit(ni, m, NULL);
759 * Assign priority to a frame based on any vlan tag assigned
760 * to the station and/or any Diffserv setting in an IP header.
761 * Finally, if an ACM policy is setup (in station mode) it's
765 ieee80211_classify(struct ieee80211_node *ni, struct mbuf *m)
767 const struct ether_header *eh = mtod(m, struct ether_header *);
768 int v_wme_ac, d_wme_ac, ac;
771 * Always promote PAE/EAPOL frames to high priority.
773 if (eh->ether_type == htons(ETHERTYPE_PAE)) {
774 /* NB: mark so others don't need to check header */
775 m->m_flags |= M_EAPOL;
780 * Non-qos traffic goes to BE.
782 if ((ni->ni_flags & IEEE80211_NODE_QOS) == 0) {
788 * If node has a vlan tag then all traffic
789 * to it must have a matching tag.
792 if (ni->ni_vlan != 0) {
793 if ((m->m_flags & M_VLANTAG) == 0) {
794 IEEE80211_NODE_STAT(ni, tx_novlantag);
798 if (EVL_VLANOFTAG(m->m_pkthdr.ether_vlantag) !=
799 EVL_VLANOFTAG(ni->ni_vlan)) {
800 IEEE80211_NODE_STAT(ni, tx_vlanmismatch);
803 /* map vlan priority to AC */
804 v_wme_ac = TID_TO_WME_AC(EVL_PRIOFTAG(ni->ni_vlan));
808 /* XXX m_copydata may be too slow for fast path */
810 if (eh->ether_type == htons(ETHERTYPE_IP)) {
813 * IP frame, map the DSCP bits from the TOS field.
815 /* NB: ip header may not be in first mbuf */
816 m_copydata(m, sizeof(struct ether_header) +
817 offsetof(struct ip, ip_tos), sizeof(tos), &tos);
818 tos >>= 5; /* NB: ECN + low 3 bits of DSCP */
819 d_wme_ac = TID_TO_WME_AC(tos);
823 if (eh->ether_type == htons(ETHERTYPE_IPV6)) {
827 * IPv6 frame, map the DSCP bits from the TOS field.
829 m_copydata(m, sizeof(struct ether_header) +
830 offsetof(struct ip6_hdr, ip6_flow), sizeof(flow),
832 tos = (uint8_t)(ntohl(flow) >> 20);
833 tos >>= 5; /* NB: ECN + low 3 bits of DSCP */
834 d_wme_ac = TID_TO_WME_AC(tos);
837 d_wme_ac = WME_AC_BE;
845 * Use highest priority AC.
847 if (v_wme_ac > d_wme_ac)
855 if (ni->ni_vap->iv_opmode == IEEE80211_M_STA) {
856 static const int acmap[4] = {
857 WME_AC_BK, /* WME_AC_BE */
858 WME_AC_BK, /* WME_AC_BK */
859 WME_AC_BE, /* WME_AC_VI */
860 WME_AC_VI, /* WME_AC_VO */
862 struct ieee80211com *ic = ni->ni_ic;
864 while (ac != WME_AC_BK &&
865 ic->ic_wme.wme_wmeBssChanParams.cap_wmeParams[ac].wmep_acm)
874 * Insure there is sufficient contiguous space to encapsulate the
875 * 802.11 data frame. If room isn't already there, arrange for it.
876 * Drivers and cipher modules assume we have done the necessary work
877 * and fail rudely if they don't find the space they need.
880 ieee80211_mbuf_adjust(struct ieee80211vap *vap, int hdrsize,
881 struct ieee80211_key *key, struct mbuf *m)
883 #define TO_BE_RECLAIMED (sizeof(struct ether_header) - sizeof(struct llc))
884 int needed_space = vap->iv_ic->ic_headroom + hdrsize;
887 /* XXX belongs in crypto code? */
888 needed_space += key->wk_cipher->ic_header;
891 * When crypto is being done in the host we must insure
892 * the data are writable for the cipher routines; clone
893 * a writable mbuf chain.
894 * XXX handle SWMIC specially
897 if (key->wk_flags & (IEEE80211_KEY_SWENCRYPT|IEEE80211_KEY_SWENMIC)) {
898 m = m_unshare(m, M_NOWAIT);
900 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
901 "%s: cannot get writable mbuf\n", __func__);
902 vap->iv_stats.is_tx_nobuf++; /* XXX new stat */
909 * We know we are called just before stripping an Ethernet
910 * header and prepending an LLC header. This means we know
912 * sizeof(struct ether_header) - sizeof(struct llc)
913 * bytes recovered to which we need additional space for the
914 * 802.11 header and any crypto header.
916 /* XXX check trailing space and copy instead? */
917 if (M_LEADINGSPACE(m) < needed_space - TO_BE_RECLAIMED) {
918 struct mbuf *n = m_gethdr(M_NOWAIT, m->m_type);
920 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
921 "%s: cannot expand storage\n", __func__);
922 vap->iv_stats.is_tx_nobuf++;
926 KASSERT(needed_space <= MHLEN,
927 ("not enough room, need %u got %zu\n", needed_space, MHLEN));
929 * Setup new mbuf to have leading space to prepend the
930 * 802.11 header and any crypto header bits that are
931 * required (the latter are added when the driver calls
932 * back to ieee80211_crypto_encap to do crypto encapsulation).
934 /* NB: must be first 'cuz it clobbers m_data */
936 n->m_len = 0; /* NB: m_gethdr does not set */
937 n->m_data += needed_space;
939 * Pull up Ethernet header to create the expected layout.
940 * We could use m_pullup but that's overkill (i.e. we don't
941 * need the actual data) and it cannot fail so do it inline
944 /* NB: struct ether_header is known to be contiguous */
945 n->m_len += sizeof(struct ether_header);
946 m->m_len -= sizeof(struct ether_header);
947 m->m_data += sizeof(struct ether_header);
949 * Replace the head of the chain.
955 #undef TO_BE_RECLAIMED
959 * Return the transmit key to use in sending a unicast frame.
960 * If a unicast key is set we use that. When no unicast key is set
961 * we fall back to the default transmit key.
963 static __inline struct ieee80211_key *
964 ieee80211_crypto_getucastkey(struct ieee80211vap *vap,
965 struct ieee80211_node *ni)
967 if (IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)) {
968 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE ||
969 IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey]))
971 return &vap->iv_nw_keys[vap->iv_def_txkey];
973 return &ni->ni_ucastkey;
978 * Return the transmit key to use in sending a multicast frame.
979 * Multicast traffic always uses the group key which is installed as
980 * the default tx key.
982 static __inline struct ieee80211_key *
983 ieee80211_crypto_getmcastkey(struct ieee80211vap *vap,
984 struct ieee80211_node *ni)
986 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE ||
987 IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey]))
989 return &vap->iv_nw_keys[vap->iv_def_txkey];
993 * Encapsulate an outbound data frame. The mbuf chain is updated.
994 * If an error is encountered NULL is returned. The caller is required
995 * to provide a node reference and pullup the ethernet header in the
998 * NB: Packet is assumed to be processed by ieee80211_classify which
999 * marked EAPOL frames w/ M_EAPOL.
1002 ieee80211_encap(struct ieee80211vap *vap, struct ieee80211_node *ni,
1005 #define WH4(wh) ((struct ieee80211_frame_addr4 *)(wh))
1006 struct ieee80211com *ic = ni->ni_ic;
1007 #ifdef IEEE80211_SUPPORT_MESH
1008 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1009 struct ieee80211_meshcntl_ae10 *mc;
1011 struct ether_header eh;
1012 struct ieee80211_frame *wh;
1013 struct ieee80211_key *key;
1015 int hdrsize, hdrspace, datalen, addqos, txfrag, is4addr;
1016 ieee80211_seq seqno;
1017 int meshhdrsize, meshae;
1021 * Copy existing Ethernet header to a safe place. The
1022 * rest of the code assumes it's ok to strip it when
1023 * reorganizing state for the final encapsulation.
1025 KASSERT(m->m_len >= sizeof(eh), ("no ethernet header!"));
1026 ETHER_HEADER_COPY(&eh, mtod(m, caddr_t));
1029 * Insure space for additional headers. First identify
1030 * transmit key to use in calculating any buffer adjustments
1031 * required. This is also used below to do privacy
1032 * encapsulation work. Then calculate the 802.11 header
1033 * size and any padding required by the driver.
1035 * Note key may be NULL if we fall back to the default
1036 * transmit key and that is not set. In that case the
1037 * buffer may not be expanded as needed by the cipher
1038 * routines, but they will/should discard it.
1040 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
1041 if (vap->iv_opmode == IEEE80211_M_STA ||
1042 !IEEE80211_IS_MULTICAST(eh.ether_dhost) ||
1043 (vap->iv_opmode == IEEE80211_M_WDS &&
1044 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY)))
1045 key = ieee80211_crypto_getucastkey(vap, ni);
1047 key = ieee80211_crypto_getmcastkey(vap, ni);
1048 if (key == NULL && (m->m_flags & M_EAPOL) == 0) {
1049 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO,
1051 "no default transmit key (%s) deftxkey %u",
1052 __func__, vap->iv_def_txkey);
1053 vap->iv_stats.is_tx_nodefkey++;
1059 * XXX Some ap's don't handle QoS-encapsulated EAPOL
1060 * frames so suppress use. This may be an issue if other
1061 * ap's require all data frames to be QoS-encapsulated
1062 * once negotiated in which case we'll need to make this
1065 addqos = (ni->ni_flags & (IEEE80211_NODE_QOS|IEEE80211_NODE_HT)) &&
1066 (m->m_flags & M_EAPOL) == 0;
1068 hdrsize = sizeof(struct ieee80211_qosframe);
1070 hdrsize = sizeof(struct ieee80211_frame);
1071 #ifdef IEEE80211_SUPPORT_MESH
1072 if (vap->iv_opmode == IEEE80211_M_MBSS) {
1074 * Mesh data frames are encapsulated according to the
1075 * rules of Section 11B.8.5 (p.139 of D3.0 spec).
1076 * o Group Addressed data (aka multicast) originating
1077 * at the local sta are sent w/ 3-address format and
1078 * address extension mode 00
1079 * o Individually Addressed data (aka unicast) originating
1080 * at the local sta are sent w/ 4-address format and
1081 * address extension mode 00
1082 * o Group Addressed data forwarded from a non-mesh sta are
1083 * sent w/ 3-address format and address extension mode 01
1084 * o Individually Address data from another sta are sent
1085 * w/ 4-address format and address extension mode 10
1087 is4addr = 0; /* NB: don't use, disable */
1088 if (!IEEE80211_IS_MULTICAST(eh.ether_dhost))
1089 hdrsize += IEEE80211_ADDR_LEN; /* unicast are 4-addr */
1090 meshhdrsize = sizeof(struct ieee80211_meshcntl);
1091 /* XXX defines for AE modes */
1092 if (IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr)) {
1093 if (!IEEE80211_IS_MULTICAST(eh.ether_dhost))
1096 meshae = 4; /* NB: pseudo */
1097 } else if (IEEE80211_IS_MULTICAST(eh.ether_dhost)) {
1099 meshhdrsize += 1*IEEE80211_ADDR_LEN;
1102 meshhdrsize += 2*IEEE80211_ADDR_LEN;
1107 * 4-address frames need to be generated for:
1108 * o packets sent through a WDS vap (IEEE80211_M_WDS)
1109 * o packets sent through a vap marked for relaying
1110 * (e.g. a station operating with dynamic WDS)
1112 is4addr = vap->iv_opmode == IEEE80211_M_WDS ||
1113 ((vap->iv_flags_ext & IEEE80211_FEXT_4ADDR) &&
1114 !IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr));
1116 hdrsize += IEEE80211_ADDR_LEN;
1117 meshhdrsize = meshae = 0;
1118 #ifdef IEEE80211_SUPPORT_MESH
1122 * Honor driver DATAPAD requirement.
1124 if (ic->ic_flags & IEEE80211_F_DATAPAD)
1125 hdrspace = roundup(hdrsize, sizeof(uint32_t));
1129 if (__predict_true((m->m_flags & M_FF) == 0)) {
1133 m = ieee80211_mbuf_adjust(vap, hdrspace + meshhdrsize, key, m);
1135 /* NB: ieee80211_mbuf_adjust handles msgs+statistics */
1138 /* NB: this could be optimized 'cuz of ieee80211_mbuf_adjust */
1139 m_adj(m, sizeof(struct ether_header) - sizeof(struct llc));
1140 llc = mtod(m, struct llc *);
1141 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP;
1142 llc->llc_control = LLC_UI;
1143 llc->llc_snap.org_code[0] = 0;
1144 llc->llc_snap.org_code[1] = 0;
1145 llc->llc_snap.org_code[2] = 0;
1146 llc->llc_snap.ether_type = eh.ether_type;
1148 #ifdef IEEE80211_SUPPORT_SUPERG
1152 m = ieee80211_ff_encap(vap, m, hdrspace + meshhdrsize, key);
1157 datalen = m->m_pkthdr.len; /* NB: w/o 802.11 header */
1159 M_PREPEND(m, hdrspace + meshhdrsize, MB_DONTWAIT);
1161 vap->iv_stats.is_tx_nobuf++;
1164 wh = mtod(m, struct ieee80211_frame *);
1165 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_DATA;
1166 *(uint16_t *)wh->i_dur = 0;
1167 qos = NULL; /* NB: quiet compiler */
1169 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS;
1170 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr);
1171 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
1172 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost);
1173 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, eh.ether_shost);
1174 } else switch (vap->iv_opmode) {
1175 case IEEE80211_M_STA:
1176 wh->i_fc[1] = IEEE80211_FC1_DIR_TODS;
1177 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_bssid);
1178 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost);
1179 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost);
1181 case IEEE80211_M_IBSS:
1182 case IEEE80211_M_AHDEMO:
1183 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
1184 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost);
1185 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost);
1187 * NB: always use the bssid from iv_bss as the
1188 * neighbor's may be stale after an ibss merge
1190 IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_bss->ni_bssid);
1192 case IEEE80211_M_HOSTAP:
1193 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
1194 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost);
1195 IEEE80211_ADDR_COPY(wh->i_addr2, ni->ni_bssid);
1196 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_shost);
1198 #ifdef IEEE80211_SUPPORT_MESH
1199 case IEEE80211_M_MBSS:
1200 /* NB: offset by hdrspace to deal with DATAPAD */
1201 mc = (struct ieee80211_meshcntl_ae10 *)
1202 (mtod(m, uint8_t *) + hdrspace);
1204 case 0: /* ucast, no proxy */
1205 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS;
1206 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr);
1207 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
1208 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost);
1209 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, eh.ether_shost);
1211 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos;
1213 case 4: /* mcast, no proxy */
1214 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
1215 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost);
1216 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
1217 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_shost);
1218 mc->mc_flags = 0; /* NB: AE is really 0 */
1219 qos = ((struct ieee80211_qosframe *) wh)->i_qos;
1221 case 1: /* mcast, proxy */
1222 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
1223 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost);
1224 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
1225 IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_myaddr);
1227 IEEE80211_ADDR_COPY(mc->mc_addr4, eh.ether_shost);
1228 qos = ((struct ieee80211_qosframe *) wh)->i_qos;
1230 case 2: /* ucast, proxy */
1231 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS;
1232 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr);
1233 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
1234 /* XXX not right, need MeshDA */
1235 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost);
1236 /* XXX assume are MeshSA */
1237 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, vap->iv_myaddr);
1239 IEEE80211_ADDR_COPY(mc->mc_addr4, eh.ether_dhost);
1240 IEEE80211_ADDR_COPY(mc->mc_addr5, eh.ether_shost);
1241 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos;
1244 KASSERT(0, ("meshae %d", meshae));
1247 mc->mc_ttl = ms->ms_ttl;
1249 LE_WRITE_4(mc->mc_seq, ms->ms_seq);
1252 case IEEE80211_M_WDS: /* NB: is4addr should always be true */
1256 if (m->m_flags & M_MORE_DATA)
1257 wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA;
1262 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos;
1263 /* NB: mesh case handled earlier */
1264 } else if (vap->iv_opmode != IEEE80211_M_MBSS)
1265 qos = ((struct ieee80211_qosframe *) wh)->i_qos;
1266 ac = M_WME_GETAC(m);
1267 /* map from access class/queue to 11e header priorty value */
1268 tid = WME_AC_TO_TID(ac);
1269 qos[0] = tid & IEEE80211_QOS_TID;
1270 if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[ac].wmep_noackPolicy)
1271 qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK;
1273 wh->i_fc[0] |= IEEE80211_FC0_SUBTYPE_QOS;
1275 if ((m->m_flags & M_AMPDU_MPDU) == 0) {
1277 * NB: don't assign a sequence # to potential
1278 * aggregates; we expect this happens at the
1279 * point the frame comes off any aggregation q
1280 * as otherwise we may introduce holes in the
1281 * BA sequence space and/or make window accouting
1284 * XXX may want to control this with a driver
1285 * capability; this may also change when we pull
1286 * aggregation up into net80211
1288 seqno = ni->ni_txseqs[tid]++;
1289 *(uint16_t *)wh->i_seq =
1290 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
1291 M_SEQNO_SET(m, seqno);
1294 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++;
1295 *(uint16_t *)wh->i_seq =
1296 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
1297 M_SEQNO_SET(m, seqno);
1301 /* check if xmit fragmentation is required */
1302 txfrag = (m->m_pkthdr.len > vap->iv_fragthreshold &&
1303 !IEEE80211_IS_MULTICAST(wh->i_addr1) &&
1304 (vap->iv_caps & IEEE80211_C_TXFRAG) &&
1305 (m->m_flags & (M_FF | M_AMPDU_MPDU)) == 0);
1308 * IEEE 802.1X: send EAPOL frames always in the clear.
1309 * WPA/WPA2: encrypt EAPOL keys when pairwise keys are set.
1311 if ((m->m_flags & M_EAPOL) == 0 ||
1312 ((vap->iv_flags & IEEE80211_F_WPA) &&
1313 (vap->iv_opmode == IEEE80211_M_STA ?
1314 !IEEE80211_KEY_UNDEFINED(key) :
1315 !IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)))) {
1316 wh->i_fc[1] |= IEEE80211_FC1_WEP;
1317 if (!ieee80211_crypto_enmic(vap, key, m, txfrag)) {
1318 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT,
1320 "%s", "enmic failed, discard frame");
1321 vap->iv_stats.is_crypto_enmicfail++;
1326 if (txfrag && !ieee80211_fragment(vap, m, hdrsize,
1327 key != NULL ? key->wk_cipher->ic_header : 0, vap->iv_fragthreshold))
1330 m->m_flags |= M_ENCAP; /* mark encapsulated */
1332 IEEE80211_NODE_STAT(ni, tx_data);
1333 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1334 IEEE80211_NODE_STAT(ni, tx_mcast);
1335 m->m_flags |= M_MCAST;
1337 IEEE80211_NODE_STAT(ni, tx_ucast);
1338 IEEE80211_NODE_STAT_ADD(ni, tx_bytes, datalen);
1349 * Fragment the frame according to the specified mtu.
1350 * The size of the 802.11 header (w/o padding) is provided
1351 * so we don't need to recalculate it. We create a new
1352 * mbuf for each fragment and chain it through m_nextpkt;
1353 * we might be able to optimize this by reusing the original
1354 * packet's mbufs but that is significantly more complicated.
1357 ieee80211_fragment(struct ieee80211vap *vap, struct mbuf *m0,
1358 u_int hdrsize, u_int ciphdrsize, u_int mtu)
1360 struct ieee80211_frame *wh, *whf;
1361 struct mbuf *m, *prev, *next;
1362 u_int totalhdrsize, fragno, fragsize, off, remainder, payload;
1364 KASSERT(m0->m_nextpkt == NULL, ("mbuf already chained?"));
1365 KASSERT(m0->m_pkthdr.len > mtu,
1366 ("pktlen %u mtu %u", m0->m_pkthdr.len, mtu));
1368 wh = mtod(m0, struct ieee80211_frame *);
1369 /* NB: mark the first frag; it will be propagated below */
1370 wh->i_fc[1] |= IEEE80211_FC1_MORE_FRAG;
1371 totalhdrsize = hdrsize + ciphdrsize;
1373 off = mtu - ciphdrsize;
1374 remainder = m0->m_pkthdr.len - off;
1377 fragsize = totalhdrsize + remainder;
1380 /* XXX fragsize can be >2048! */
1381 KASSERT(fragsize < MCLBYTES,
1382 ("fragment size %u too big!", fragsize));
1383 if (fragsize > MHLEN)
1384 m = m_getcl(MB_DONTWAIT, MT_DATA, M_PKTHDR);
1386 m = m_gethdr(MB_DONTWAIT, MT_DATA);
1389 /* leave room to prepend any cipher header */
1390 m_align(m, fragsize - ciphdrsize);
1393 * Form the header in the fragment. Note that since
1394 * we mark the first fragment with the MORE_FRAG bit
1395 * it automatically is propagated to each fragment; we
1396 * need only clear it on the last fragment (done below).
1398 whf = mtod(m, struct ieee80211_frame *);
1399 memcpy(whf, wh, hdrsize);
1400 *(uint16_t *)&whf->i_seq[0] |= htole16(
1401 (fragno & IEEE80211_SEQ_FRAG_MASK) <<
1402 IEEE80211_SEQ_FRAG_SHIFT);
1405 payload = fragsize - totalhdrsize;
1406 /* NB: destination is known to be contiguous */
1407 m_copydata(m0, off, payload, mtod(m, uint8_t *) + hdrsize);
1408 m->m_len = hdrsize + payload;
1409 m->m_pkthdr.len = hdrsize + payload;
1410 m->m_flags |= M_FRAG;
1412 /* chain up the fragment */
1413 prev->m_nextpkt = m;
1416 /* deduct fragment just formed */
1417 remainder -= payload;
1419 } while (remainder != 0);
1421 /* set the last fragment */
1422 m->m_flags |= M_LASTFRAG;
1423 whf->i_fc[1] &= ~IEEE80211_FC1_MORE_FRAG;
1425 /* strip first mbuf now that everything has been copied */
1426 m_adj(m0, -(m0->m_pkthdr.len - (mtu - ciphdrsize)));
1427 m0->m_flags |= M_FIRSTFRAG | M_FRAG;
1429 vap->iv_stats.is_tx_fragframes++;
1430 vap->iv_stats.is_tx_frags += fragno-1;
1434 /* reclaim fragments but leave original frame for caller to free */
1435 for (m = m0->m_nextpkt; m != NULL; m = next) {
1436 next = m->m_nextpkt;
1437 m->m_nextpkt = NULL; /* XXX paranoid */
1440 m0->m_nextpkt = NULL;
1445 * Add a supported rates element id to a frame.
1448 ieee80211_add_rates(uint8_t *frm, const struct ieee80211_rateset *rs)
1452 *frm++ = IEEE80211_ELEMID_RATES;
1453 nrates = rs->rs_nrates;
1454 if (nrates > IEEE80211_RATE_SIZE)
1455 nrates = IEEE80211_RATE_SIZE;
1457 memcpy(frm, rs->rs_rates, nrates);
1458 return frm + nrates;
1462 * Add an extended supported rates element id to a frame.
1465 ieee80211_add_xrates(uint8_t *frm, const struct ieee80211_rateset *rs)
1468 * Add an extended supported rates element if operating in 11g mode.
1470 if (rs->rs_nrates > IEEE80211_RATE_SIZE) {
1471 int nrates = rs->rs_nrates - IEEE80211_RATE_SIZE;
1472 *frm++ = IEEE80211_ELEMID_XRATES;
1474 memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates);
1481 * Add an ssid element to a frame.
1484 ieee80211_add_ssid(uint8_t *frm, const uint8_t *ssid, u_int len)
1486 *frm++ = IEEE80211_ELEMID_SSID;
1488 memcpy(frm, ssid, len);
1493 * Add an erp element to a frame.
1496 ieee80211_add_erp(uint8_t *frm, struct ieee80211com *ic)
1500 *frm++ = IEEE80211_ELEMID_ERP;
1503 if (ic->ic_nonerpsta != 0)
1504 erp |= IEEE80211_ERP_NON_ERP_PRESENT;
1505 if (ic->ic_flags & IEEE80211_F_USEPROT)
1506 erp |= IEEE80211_ERP_USE_PROTECTION;
1507 if (ic->ic_flags & IEEE80211_F_USEBARKER)
1508 erp |= IEEE80211_ERP_LONG_PREAMBLE;
1514 * Add a CFParams element to a frame.
1517 ieee80211_add_cfparms(uint8_t *frm, struct ieee80211com *ic)
1519 #define ADDSHORT(frm, v) do { \
1520 LE_WRITE_2(frm, v); \
1523 *frm++ = IEEE80211_ELEMID_CFPARMS;
1525 *frm++ = 0; /* CFP count */
1526 *frm++ = 2; /* CFP period */
1527 ADDSHORT(frm, 0); /* CFP MaxDuration (TU) */
1528 ADDSHORT(frm, 0); /* CFP CurRemaining (TU) */
1533 static __inline uint8_t *
1534 add_appie(uint8_t *frm, const struct ieee80211_appie *ie)
1536 memcpy(frm, ie->ie_data, ie->ie_len);
1537 return frm + ie->ie_len;
1540 static __inline uint8_t *
1541 add_ie(uint8_t *frm, const uint8_t *ie)
1543 memcpy(frm, ie, 2 + ie[1]);
1544 return frm + 2 + ie[1];
1547 #define WME_OUI_BYTES 0x00, 0x50, 0xf2
1549 * Add a WME information element to a frame.
1552 ieee80211_add_wme_info(uint8_t *frm, struct ieee80211_wme_state *wme)
1554 static const struct ieee80211_wme_info info = {
1555 .wme_id = IEEE80211_ELEMID_VENDOR,
1556 .wme_len = sizeof(struct ieee80211_wme_info) - 2,
1557 .wme_oui = { WME_OUI_BYTES },
1558 .wme_type = WME_OUI_TYPE,
1559 .wme_subtype = WME_INFO_OUI_SUBTYPE,
1560 .wme_version = WME_VERSION,
1563 memcpy(frm, &info, sizeof(info));
1564 return frm + sizeof(info);
1568 * Add a WME parameters element to a frame.
1571 ieee80211_add_wme_param(uint8_t *frm, struct ieee80211_wme_state *wme)
1573 #define SM(_v, _f) (((_v) << _f##_S) & _f)
1574 #define ADDSHORT(frm, v) do { \
1575 LE_WRITE_2(frm, v); \
1578 /* NB: this works 'cuz a param has an info at the front */
1579 static const struct ieee80211_wme_info param = {
1580 .wme_id = IEEE80211_ELEMID_VENDOR,
1581 .wme_len = sizeof(struct ieee80211_wme_param) - 2,
1582 .wme_oui = { WME_OUI_BYTES },
1583 .wme_type = WME_OUI_TYPE,
1584 .wme_subtype = WME_PARAM_OUI_SUBTYPE,
1585 .wme_version = WME_VERSION,
1589 memcpy(frm, ¶m, sizeof(param));
1590 frm += __offsetof(struct ieee80211_wme_info, wme_info);
1591 *frm++ = wme->wme_bssChanParams.cap_info; /* AC info */
1592 *frm++ = 0; /* reserved field */
1593 for (i = 0; i < WME_NUM_AC; i++) {
1594 const struct wmeParams *ac =
1595 &wme->wme_bssChanParams.cap_wmeParams[i];
1596 *frm++ = SM(i, WME_PARAM_ACI)
1597 | SM(ac->wmep_acm, WME_PARAM_ACM)
1598 | SM(ac->wmep_aifsn, WME_PARAM_AIFSN)
1600 *frm++ = SM(ac->wmep_logcwmax, WME_PARAM_LOGCWMAX)
1601 | SM(ac->wmep_logcwmin, WME_PARAM_LOGCWMIN)
1603 ADDSHORT(frm, ac->wmep_txopLimit);
1609 #undef WME_OUI_BYTES
1612 * Add an 11h Power Constraint element to a frame.
1615 ieee80211_add_powerconstraint(uint8_t *frm, struct ieee80211vap *vap)
1617 const struct ieee80211_channel *c = vap->iv_bss->ni_chan;
1618 /* XXX per-vap tx power limit? */
1619 int8_t limit = vap->iv_ic->ic_txpowlimit / 2;
1621 frm[0] = IEEE80211_ELEMID_PWRCNSTR;
1623 frm[2] = c->ic_maxregpower > limit ? c->ic_maxregpower - limit : 0;
1628 * Add an 11h Power Capability element to a frame.
1631 ieee80211_add_powercapability(uint8_t *frm, const struct ieee80211_channel *c)
1633 frm[0] = IEEE80211_ELEMID_PWRCAP;
1635 frm[2] = c->ic_minpower;
1636 frm[3] = c->ic_maxpower;
1641 * Add an 11h Supported Channels element to a frame.
1644 ieee80211_add_supportedchannels(uint8_t *frm, struct ieee80211com *ic)
1646 static const int ielen = 26;
1648 frm[0] = IEEE80211_ELEMID_SUPPCHAN;
1650 /* XXX not correct */
1651 memcpy(frm+2, ic->ic_chan_avail, ielen);
1652 return frm + 2 + ielen;
1656 * Add an 11h Channel Switch Announcement element to a frame.
1657 * Note that we use the per-vap CSA count to adjust the global
1658 * counter so we can use this routine to form probe response
1659 * frames and get the current count.
1662 ieee80211_add_csa(uint8_t *frm, struct ieee80211vap *vap)
1664 struct ieee80211com *ic = vap->iv_ic;
1665 struct ieee80211_csa_ie *csa = (struct ieee80211_csa_ie *) frm;
1667 csa->csa_ie = IEEE80211_ELEMID_CSA;
1669 csa->csa_mode = 1; /* XXX force quiet on channel */
1670 csa->csa_newchan = ieee80211_chan2ieee(ic, ic->ic_csa_newchan);
1671 csa->csa_count = ic->ic_csa_count - vap->iv_csa_count;
1672 return frm + sizeof(*csa);
1676 * Add an 11h country information element to a frame.
1679 ieee80211_add_countryie(uint8_t *frm, struct ieee80211com *ic)
1682 if (ic->ic_countryie == NULL ||
1683 ic->ic_countryie_chan != ic->ic_bsschan) {
1685 * Handle lazy construction of ie. This is done on
1686 * first use and after a channel change that requires
1689 if (ic->ic_countryie != NULL)
1690 kfree(ic->ic_countryie, M_80211_NODE_IE);
1691 ic->ic_countryie = ieee80211_alloc_countryie(ic);
1692 if (ic->ic_countryie == NULL)
1694 ic->ic_countryie_chan = ic->ic_bsschan;
1696 return add_appie(frm, ic->ic_countryie);
1700 * Send a probe request frame with the specified ssid
1701 * and any optional information element data.
1704 ieee80211_send_probereq(struct ieee80211_node *ni,
1705 const uint8_t sa[IEEE80211_ADDR_LEN],
1706 const uint8_t da[IEEE80211_ADDR_LEN],
1707 const uint8_t bssid[IEEE80211_ADDR_LEN],
1708 const uint8_t *ssid, size_t ssidlen)
1710 struct ieee80211vap *vap = ni->ni_vap;
1711 struct ieee80211com *ic = ni->ni_ic;
1712 const struct ieee80211_txparam *tp;
1713 struct ieee80211_bpf_params params;
1714 struct ieee80211_frame *wh;
1715 const struct ieee80211_rateset *rs;
1719 if (vap->iv_state == IEEE80211_S_CAC) {
1720 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni,
1721 "block %s frame in CAC state", "probe request");
1722 vap->iv_stats.is_tx_badstate++;
1723 return EIO; /* XXX */
1727 * Hold a reference on the node so it doesn't go away until after
1728 * the xmit is complete all the way in the driver. On error we
1729 * will remove our reference.
1731 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1732 "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n",
1734 ni, ni->ni_macaddr, ":",
1735 ieee80211_node_refcnt(ni)+1);
1736 ieee80211_ref_node(ni);
1739 * prreq frame format
1741 * [tlv] supported rates
1742 * [tlv] RSN (optional)
1743 * [tlv] extended supported rates
1744 * [tlv] WPA (optional)
1745 * [tlv] user-specified ie's
1747 m = ieee80211_getmgtframe(&frm,
1748 ic->ic_headroom + sizeof(struct ieee80211_frame),
1749 2 + IEEE80211_NWID_LEN
1750 + 2 + IEEE80211_RATE_SIZE
1751 + sizeof(struct ieee80211_ie_wpa)
1752 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
1753 + sizeof(struct ieee80211_ie_wpa)
1754 + (vap->iv_appie_probereq != NULL ?
1755 vap->iv_appie_probereq->ie_len : 0)
1758 vap->iv_stats.is_tx_nobuf++;
1759 ieee80211_free_node(ni);
1763 frm = ieee80211_add_ssid(frm, ssid, ssidlen);
1764 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
1765 frm = ieee80211_add_rates(frm, rs);
1766 if (vap->iv_flags & IEEE80211_F_WPA2) {
1767 if (vap->iv_rsn_ie != NULL)
1768 frm = add_ie(frm, vap->iv_rsn_ie);
1769 /* XXX else complain? */
1771 frm = ieee80211_add_xrates(frm, rs);
1772 if (vap->iv_flags & IEEE80211_F_WPA1) {
1773 if (vap->iv_wpa_ie != NULL)
1774 frm = add_ie(frm, vap->iv_wpa_ie);
1775 /* XXX else complain? */
1777 if (vap->iv_appie_probereq != NULL)
1778 frm = add_appie(frm, vap->iv_appie_probereq);
1779 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
1781 KASSERT(M_LEADINGSPACE(m) >= sizeof(struct ieee80211_frame),
1782 ("leading space %zd", M_LEADINGSPACE(m)));
1783 M_PREPEND(m, sizeof(struct ieee80211_frame), MB_DONTWAIT);
1785 /* NB: cannot happen */
1786 ieee80211_free_node(ni);
1790 wh = mtod(m, struct ieee80211_frame *);
1791 ieee80211_send_setup(ni, m,
1792 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ,
1793 IEEE80211_NONQOS_TID, sa, da, bssid);
1794 /* XXX power management? */
1795 m->m_flags |= M_ENCAP; /* mark encapsulated */
1797 M_WME_SETAC(m, WME_AC_BE);
1799 IEEE80211_NODE_STAT(ni, tx_probereq);
1800 IEEE80211_NODE_STAT(ni, tx_mgmt);
1802 IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS,
1803 "send probe req on channel %u bssid %6D ssid \"%.*s\"\n",
1804 ieee80211_chan2ieee(ic, ic->ic_curchan), bssid, ":",
1807 memset(¶ms, 0, sizeof(params));
1808 params.ibp_pri = M_WME_GETAC(m);
1809 tp = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)];
1810 params.ibp_rate0 = tp->mgmtrate;
1811 if (IEEE80211_IS_MULTICAST(da)) {
1812 params.ibp_flags |= IEEE80211_BPF_NOACK;
1813 params.ibp_try0 = 1;
1815 params.ibp_try0 = tp->maxretry;
1816 params.ibp_power = ni->ni_txpower;
1817 return ic->ic_raw_xmit(ni, m, ¶ms);
1821 * Calculate capability information for mgt frames.
1824 ieee80211_getcapinfo(struct ieee80211vap *vap, struct ieee80211_channel *chan)
1826 struct ieee80211com *ic = vap->iv_ic;
1829 KASSERT(vap->iv_opmode != IEEE80211_M_STA, ("station mode"));
1831 if (vap->iv_opmode == IEEE80211_M_HOSTAP)
1832 capinfo = IEEE80211_CAPINFO_ESS;
1833 else if (vap->iv_opmode == IEEE80211_M_IBSS)
1834 capinfo = IEEE80211_CAPINFO_IBSS;
1837 if (vap->iv_flags & IEEE80211_F_PRIVACY)
1838 capinfo |= IEEE80211_CAPINFO_PRIVACY;
1839 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
1840 IEEE80211_IS_CHAN_2GHZ(chan))
1841 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
1842 if (ic->ic_flags & IEEE80211_F_SHSLOT)
1843 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
1844 if (IEEE80211_IS_CHAN_5GHZ(chan) && (vap->iv_flags & IEEE80211_F_DOTH))
1845 capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT;
1850 * Send a management frame. The node is for the destination (or ic_bss
1851 * when in station mode). Nodes other than ic_bss have their reference
1852 * count bumped to reflect our use for an indeterminant time.
1855 ieee80211_send_mgmt(struct ieee80211_node *ni, int type, int arg)
1857 #define HTFLAGS (IEEE80211_NODE_HT | IEEE80211_NODE_HTCOMPAT)
1858 #define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0)
1859 struct ieee80211vap *vap = ni->ni_vap;
1860 struct ieee80211com *ic = ni->ni_ic;
1861 struct ieee80211_node *bss = vap->iv_bss;
1862 struct ieee80211_bpf_params params;
1866 int has_challenge, is_shared_key, ret, status;
1868 KASSERT(ni != NULL, ("null node"));
1871 * Hold a reference on the node so it doesn't go away until after
1872 * the xmit is complete all the way in the driver. On error we
1873 * will remove our reference.
1875 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1876 "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n",
1878 ni, ni->ni_macaddr, ":",
1879 ieee80211_node_refcnt(ni)+1);
1880 ieee80211_ref_node(ni);
1882 memset(¶ms, 0, sizeof(params));
1885 case IEEE80211_FC0_SUBTYPE_AUTH:
1888 has_challenge = ((arg == IEEE80211_AUTH_SHARED_CHALLENGE ||
1889 arg == IEEE80211_AUTH_SHARED_RESPONSE) &&
1890 ni->ni_challenge != NULL);
1893 * Deduce whether we're doing open authentication or
1894 * shared key authentication. We do the latter if
1895 * we're in the middle of a shared key authentication
1896 * handshake or if we're initiating an authentication
1897 * request and configured to use shared key.
1899 is_shared_key = has_challenge ||
1900 arg >= IEEE80211_AUTH_SHARED_RESPONSE ||
1901 (arg == IEEE80211_AUTH_SHARED_REQUEST &&
1902 bss->ni_authmode == IEEE80211_AUTH_SHARED);
1904 m = ieee80211_getmgtframe(&frm,
1905 ic->ic_headroom + sizeof(struct ieee80211_frame),
1906 3 * sizeof(uint16_t)
1907 + (has_challenge && status == IEEE80211_STATUS_SUCCESS ?
1908 sizeof(uint16_t)+IEEE80211_CHALLENGE_LEN : 0)
1911 senderr(ENOMEM, is_tx_nobuf);
1913 ((uint16_t *)frm)[0] =
1914 (is_shared_key) ? htole16(IEEE80211_AUTH_ALG_SHARED)
1915 : htole16(IEEE80211_AUTH_ALG_OPEN);
1916 ((uint16_t *)frm)[1] = htole16(arg); /* sequence number */
1917 ((uint16_t *)frm)[2] = htole16(status);/* status */
1919 if (has_challenge && status == IEEE80211_STATUS_SUCCESS) {
1920 ((uint16_t *)frm)[3] =
1921 htole16((IEEE80211_CHALLENGE_LEN << 8) |
1922 IEEE80211_ELEMID_CHALLENGE);
1923 memcpy(&((uint16_t *)frm)[4], ni->ni_challenge,
1924 IEEE80211_CHALLENGE_LEN);
1925 m->m_pkthdr.len = m->m_len =
1926 4 * sizeof(uint16_t) + IEEE80211_CHALLENGE_LEN;
1927 if (arg == IEEE80211_AUTH_SHARED_RESPONSE) {
1928 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni,
1929 "request encrypt frame (%s)", __func__);
1930 /* mark frame for encryption */
1931 params.ibp_flags |= IEEE80211_BPF_CRYPTO;
1934 m->m_pkthdr.len = m->m_len = 3 * sizeof(uint16_t);
1936 /* XXX not right for shared key */
1937 if (status == IEEE80211_STATUS_SUCCESS)
1938 IEEE80211_NODE_STAT(ni, tx_auth);
1940 IEEE80211_NODE_STAT(ni, tx_auth_fail);
1942 if (vap->iv_opmode == IEEE80211_M_STA)
1943 ieee80211_add_callback(m, ieee80211_tx_mgt_cb,
1944 (void *) vap->iv_state);
1947 case IEEE80211_FC0_SUBTYPE_DEAUTH:
1948 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni,
1949 "send station deauthenticate (reason %d)", arg);
1950 m = ieee80211_getmgtframe(&frm,
1951 ic->ic_headroom + sizeof(struct ieee80211_frame),
1954 senderr(ENOMEM, is_tx_nobuf);
1955 *(uint16_t *)frm = htole16(arg); /* reason */
1956 m->m_pkthdr.len = m->m_len = sizeof(uint16_t);
1958 IEEE80211_NODE_STAT(ni, tx_deauth);
1959 IEEE80211_NODE_STAT_SET(ni, tx_deauth_code, arg);
1961 ieee80211_node_unauthorize(ni); /* port closed */
1964 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
1965 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
1967 * asreq frame format
1968 * [2] capability information
1969 * [2] listen interval
1970 * [6*] current AP address (reassoc only)
1972 * [tlv] supported rates
1973 * [tlv] extended supported rates
1974 * [4] power capability (optional)
1975 * [28] supported channels (optional)
1976 * [tlv] HT capabilities
1977 * [tlv] WME (optional)
1978 * [tlv] Vendor OUI HT capabilities (optional)
1979 * [tlv] Atheros capabilities (if negotiated)
1980 * [tlv] AppIE's (optional)
1982 m = ieee80211_getmgtframe(&frm,
1983 ic->ic_headroom + sizeof(struct ieee80211_frame),
1986 + IEEE80211_ADDR_LEN
1987 + 2 + IEEE80211_NWID_LEN
1988 + 2 + IEEE80211_RATE_SIZE
1989 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
1992 + sizeof(struct ieee80211_wme_info)
1993 + sizeof(struct ieee80211_ie_htcap)
1994 + 4 + sizeof(struct ieee80211_ie_htcap)
1995 #ifdef IEEE80211_SUPPORT_SUPERG
1996 + sizeof(struct ieee80211_ath_ie)
1998 + (vap->iv_appie_wpa != NULL ?
1999 vap->iv_appie_wpa->ie_len : 0)
2000 + (vap->iv_appie_assocreq != NULL ?
2001 vap->iv_appie_assocreq->ie_len : 0)
2004 senderr(ENOMEM, is_tx_nobuf);
2006 KASSERT(vap->iv_opmode == IEEE80211_M_STA,
2007 ("wrong mode %u", vap->iv_opmode));
2008 capinfo = IEEE80211_CAPINFO_ESS;
2009 if (vap->iv_flags & IEEE80211_F_PRIVACY)
2010 capinfo |= IEEE80211_CAPINFO_PRIVACY;
2012 * NB: Some 11a AP's reject the request when
2013 * short premable is set.
2015 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
2016 IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan))
2017 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
2018 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
2019 (ic->ic_caps & IEEE80211_C_SHSLOT))
2020 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
2021 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) &&
2022 (vap->iv_flags & IEEE80211_F_DOTH))
2023 capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT;
2024 *(uint16_t *)frm = htole16(capinfo);
2027 KASSERT(bss->ni_intval != 0, ("beacon interval is zero!"));
2028 *(uint16_t *)frm = htole16(howmany(ic->ic_lintval,
2032 if (type == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) {
2033 IEEE80211_ADDR_COPY(frm, bss->ni_bssid);
2034 frm += IEEE80211_ADDR_LEN;
2037 frm = ieee80211_add_ssid(frm, ni->ni_essid, ni->ni_esslen);
2038 frm = ieee80211_add_rates(frm, &ni->ni_rates);
2039 if (vap->iv_flags & IEEE80211_F_WPA2) {
2040 if (vap->iv_rsn_ie != NULL)
2041 frm = add_ie(frm, vap->iv_rsn_ie);
2042 /* XXX else complain? */
2044 frm = ieee80211_add_xrates(frm, &ni->ni_rates);
2045 if (capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) {
2046 frm = ieee80211_add_powercapability(frm,
2048 frm = ieee80211_add_supportedchannels(frm, ic);
2050 if ((vap->iv_flags_ht & IEEE80211_FHT_HT) &&
2051 ni->ni_ies.htcap_ie != NULL &&
2052 ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_HTCAP)
2053 frm = ieee80211_add_htcap(frm, ni);
2054 if (vap->iv_flags & IEEE80211_F_WPA1) {
2055 if (vap->iv_wpa_ie != NULL)
2056 frm = add_ie(frm, vap->iv_wpa_ie);
2057 /* XXX else complain */
2059 if ((ic->ic_flags & IEEE80211_F_WME) &&
2060 ni->ni_ies.wme_ie != NULL)
2061 frm = ieee80211_add_wme_info(frm, &ic->ic_wme);
2062 if ((vap->iv_flags_ht & IEEE80211_FHT_HT) &&
2063 ni->ni_ies.htcap_ie != NULL &&
2064 ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_VENDOR)
2065 frm = ieee80211_add_htcap_vendor(frm, ni);
2066 #ifdef IEEE80211_SUPPORT_SUPERG
2067 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS)) {
2068 frm = ieee80211_add_ath(frm,
2069 IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS),
2070 ((vap->iv_flags & IEEE80211_F_WPA) == 0 &&
2071 ni->ni_authmode != IEEE80211_AUTH_8021X) ?
2072 vap->iv_def_txkey : IEEE80211_KEYIX_NONE);
2074 #endif /* IEEE80211_SUPPORT_SUPERG */
2075 if (vap->iv_appie_assocreq != NULL)
2076 frm = add_appie(frm, vap->iv_appie_assocreq);
2077 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2079 ieee80211_add_callback(m, ieee80211_tx_mgt_cb,
2080 (void *) vap->iv_state);
2083 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2084 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2086 * asresp frame format
2087 * [2] capability information
2089 * [2] association ID
2090 * [tlv] supported rates
2091 * [tlv] extended supported rates
2092 * [tlv] HT capabilities (standard, if STA enabled)
2093 * [tlv] HT information (standard, if STA enabled)
2094 * [tlv] WME (if configured and STA enabled)
2095 * [tlv] HT capabilities (vendor OUI, if STA enabled)
2096 * [tlv] HT information (vendor OUI, if STA enabled)
2097 * [tlv] Atheros capabilities (if STA enabled)
2098 * [tlv] AppIE's (optional)
2100 m = ieee80211_getmgtframe(&frm,
2101 ic->ic_headroom + sizeof(struct ieee80211_frame),
2105 + 2 + IEEE80211_RATE_SIZE
2106 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2107 + sizeof(struct ieee80211_ie_htcap) + 4
2108 + sizeof(struct ieee80211_ie_htinfo) + 4
2109 + sizeof(struct ieee80211_wme_param)
2110 #ifdef IEEE80211_SUPPORT_SUPERG
2111 + sizeof(struct ieee80211_ath_ie)
2113 + (vap->iv_appie_assocresp != NULL ?
2114 vap->iv_appie_assocresp->ie_len : 0)
2117 senderr(ENOMEM, is_tx_nobuf);
2119 capinfo = ieee80211_getcapinfo(vap, bss->ni_chan);
2120 *(uint16_t *)frm = htole16(capinfo);
2123 *(uint16_t *)frm = htole16(arg); /* status */
2126 if (arg == IEEE80211_STATUS_SUCCESS) {
2127 *(uint16_t *)frm = htole16(ni->ni_associd);
2128 IEEE80211_NODE_STAT(ni, tx_assoc);
2130 IEEE80211_NODE_STAT(ni, tx_assoc_fail);
2133 frm = ieee80211_add_rates(frm, &ni->ni_rates);
2134 frm = ieee80211_add_xrates(frm, &ni->ni_rates);
2135 /* NB: respond according to what we received */
2136 if ((ni->ni_flags & HTFLAGS) == IEEE80211_NODE_HT) {
2137 frm = ieee80211_add_htcap(frm, ni);
2138 frm = ieee80211_add_htinfo(frm, ni);
2140 if ((vap->iv_flags & IEEE80211_F_WME) &&
2141 ni->ni_ies.wme_ie != NULL)
2142 frm = ieee80211_add_wme_param(frm, &ic->ic_wme);
2143 if ((ni->ni_flags & HTFLAGS) == HTFLAGS) {
2144 frm = ieee80211_add_htcap_vendor(frm, ni);
2145 frm = ieee80211_add_htinfo_vendor(frm, ni);
2147 #ifdef IEEE80211_SUPPORT_SUPERG
2148 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS))
2149 frm = ieee80211_add_ath(frm,
2150 IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS),
2151 ((vap->iv_flags & IEEE80211_F_WPA) == 0 &&
2152 ni->ni_authmode != IEEE80211_AUTH_8021X) ?
2153 vap->iv_def_txkey : IEEE80211_KEYIX_NONE);
2154 #endif /* IEEE80211_SUPPORT_SUPERG */
2155 if (vap->iv_appie_assocresp != NULL)
2156 frm = add_appie(frm, vap->iv_appie_assocresp);
2157 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2160 case IEEE80211_FC0_SUBTYPE_DISASSOC:
2161 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
2162 "send station disassociate (reason %d)", arg);
2163 m = ieee80211_getmgtframe(&frm,
2164 ic->ic_headroom + sizeof(struct ieee80211_frame),
2167 senderr(ENOMEM, is_tx_nobuf);
2168 *(uint16_t *)frm = htole16(arg); /* reason */
2169 m->m_pkthdr.len = m->m_len = sizeof(uint16_t);
2171 IEEE80211_NODE_STAT(ni, tx_disassoc);
2172 IEEE80211_NODE_STAT_SET(ni, tx_disassoc_code, arg);
2176 IEEE80211_NOTE(vap, IEEE80211_MSG_ANY, ni,
2177 "invalid mgmt frame type %u", type);
2178 senderr(EINVAL, is_tx_unknownmgt);
2182 /* NB: force non-ProbeResp frames to the highest queue */
2183 params.ibp_pri = WME_AC_VO;
2184 params.ibp_rate0 = bss->ni_txparms->mgmtrate;
2185 /* NB: we know all frames are unicast */
2186 params.ibp_try0 = bss->ni_txparms->maxretry;
2187 params.ibp_power = bss->ni_txpower;
2188 return ieee80211_mgmt_output(ni, m, type, ¶ms);
2190 ieee80211_free_node(ni);
2197 * Return an mbuf with a probe response frame in it.
2198 * Space is left to prepend and 802.11 header at the
2199 * front but it's left to the caller to fill in.
2202 ieee80211_alloc_proberesp(struct ieee80211_node *bss, int legacy)
2204 struct ieee80211vap *vap = bss->ni_vap;
2205 struct ieee80211com *ic = bss->ni_ic;
2206 const struct ieee80211_rateset *rs;
2212 * probe response frame format
2214 * [2] beacon interval
2215 * [2] cabability information
2217 * [tlv] supported rates
2218 * [tlv] parameter set (FH/DS)
2219 * [tlv] parameter set (IBSS)
2220 * [tlv] country (optional)
2221 * [3] power control (optional)
2222 * [5] channel switch announcement (CSA) (optional)
2223 * [tlv] extended rate phy (ERP)
2224 * [tlv] extended supported rates
2225 * [tlv] RSN (optional)
2226 * [tlv] HT capabilities
2227 * [tlv] HT information
2228 * [tlv] WPA (optional)
2229 * [tlv] WME (optional)
2230 * [tlv] Vendor OUI HT capabilities (optional)
2231 * [tlv] Vendor OUI HT information (optional)
2232 * [tlv] Atheros capabilities
2233 * [tlv] AppIE's (optional)
2234 * [tlv] Mesh ID (MBSS)
2235 * [tlv] Mesh Conf (MBSS)
2237 m = ieee80211_getmgtframe(&frm,
2238 ic->ic_headroom + sizeof(struct ieee80211_frame),
2242 + 2 + IEEE80211_NWID_LEN
2243 + 2 + IEEE80211_RATE_SIZE
2245 + IEEE80211_COUNTRY_MAX_SIZE
2247 + sizeof(struct ieee80211_csa_ie)
2249 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2250 + sizeof(struct ieee80211_ie_wpa)
2251 + sizeof(struct ieee80211_ie_htcap)
2252 + sizeof(struct ieee80211_ie_htinfo)
2253 + sizeof(struct ieee80211_ie_wpa)
2254 + sizeof(struct ieee80211_wme_param)
2255 + 4 + sizeof(struct ieee80211_ie_htcap)
2256 + 4 + sizeof(struct ieee80211_ie_htinfo)
2257 #ifdef IEEE80211_SUPPORT_SUPERG
2258 + sizeof(struct ieee80211_ath_ie)
2260 #ifdef IEEE80211_SUPPORT_MESH
2261 + 2 + IEEE80211_MESHID_LEN
2262 + sizeof(struct ieee80211_meshconf_ie)
2264 + (vap->iv_appie_proberesp != NULL ?
2265 vap->iv_appie_proberesp->ie_len : 0)
2268 vap->iv_stats.is_tx_nobuf++;
2272 memset(frm, 0, 8); /* timestamp should be filled later */
2274 *(uint16_t *)frm = htole16(bss->ni_intval);
2276 capinfo = ieee80211_getcapinfo(vap, bss->ni_chan);
2277 *(uint16_t *)frm = htole16(capinfo);
2280 frm = ieee80211_add_ssid(frm, bss->ni_essid, bss->ni_esslen);
2281 rs = ieee80211_get_suprates(ic, bss->ni_chan);
2282 frm = ieee80211_add_rates(frm, rs);
2284 if (IEEE80211_IS_CHAN_FHSS(bss->ni_chan)) {
2285 *frm++ = IEEE80211_ELEMID_FHPARMS;
2287 *frm++ = bss->ni_fhdwell & 0x00ff;
2288 *frm++ = (bss->ni_fhdwell >> 8) & 0x00ff;
2289 *frm++ = IEEE80211_FH_CHANSET(
2290 ieee80211_chan2ieee(ic, bss->ni_chan));
2291 *frm++ = IEEE80211_FH_CHANPAT(
2292 ieee80211_chan2ieee(ic, bss->ni_chan));
2293 *frm++ = bss->ni_fhindex;
2295 *frm++ = IEEE80211_ELEMID_DSPARMS;
2297 *frm++ = ieee80211_chan2ieee(ic, bss->ni_chan);
2300 if (vap->iv_opmode == IEEE80211_M_IBSS) {
2301 *frm++ = IEEE80211_ELEMID_IBSSPARMS;
2303 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */
2305 if ((vap->iv_flags & IEEE80211_F_DOTH) ||
2306 (vap->iv_flags_ext & IEEE80211_FEXT_DOTD))
2307 frm = ieee80211_add_countryie(frm, ic);
2308 if (vap->iv_flags & IEEE80211_F_DOTH) {
2309 if (IEEE80211_IS_CHAN_5GHZ(bss->ni_chan))
2310 frm = ieee80211_add_powerconstraint(frm, vap);
2311 if (ic->ic_flags & IEEE80211_F_CSAPENDING)
2312 frm = ieee80211_add_csa(frm, vap);
2314 if (IEEE80211_IS_CHAN_ANYG(bss->ni_chan))
2315 frm = ieee80211_add_erp(frm, ic);
2316 frm = ieee80211_add_xrates(frm, rs);
2317 if (vap->iv_flags & IEEE80211_F_WPA2) {
2318 if (vap->iv_rsn_ie != NULL)
2319 frm = add_ie(frm, vap->iv_rsn_ie);
2320 /* XXX else complain? */
2323 * NB: legacy 11b clients do not get certain ie's.
2324 * The caller identifies such clients by passing
2325 * a token in legacy to us. Could expand this to be
2326 * any legacy client for stuff like HT ie's.
2328 if (IEEE80211_IS_CHAN_HT(bss->ni_chan) &&
2329 legacy != IEEE80211_SEND_LEGACY_11B) {
2330 frm = ieee80211_add_htcap(frm, bss);
2331 frm = ieee80211_add_htinfo(frm, bss);
2333 if (vap->iv_flags & IEEE80211_F_WPA1) {
2334 if (vap->iv_wpa_ie != NULL)
2335 frm = add_ie(frm, vap->iv_wpa_ie);
2336 /* XXX else complain? */
2338 if (vap->iv_flags & IEEE80211_F_WME)
2339 frm = ieee80211_add_wme_param(frm, &ic->ic_wme);
2340 if (IEEE80211_IS_CHAN_HT(bss->ni_chan) &&
2341 (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) &&
2342 legacy != IEEE80211_SEND_LEGACY_11B) {
2343 frm = ieee80211_add_htcap_vendor(frm, bss);
2344 frm = ieee80211_add_htinfo_vendor(frm, bss);
2346 #ifdef IEEE80211_SUPPORT_SUPERG
2347 if ((vap->iv_flags & IEEE80211_F_ATHEROS) &&
2348 legacy != IEEE80211_SEND_LEGACY_11B)
2349 frm = ieee80211_add_athcaps(frm, bss);
2351 if (vap->iv_appie_proberesp != NULL)
2352 frm = add_appie(frm, vap->iv_appie_proberesp);
2353 #ifdef IEEE80211_SUPPORT_MESH
2354 if (vap->iv_opmode == IEEE80211_M_MBSS) {
2355 frm = ieee80211_add_meshid(frm, vap);
2356 frm = ieee80211_add_meshconf(frm, vap);
2359 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2365 * Send a probe response frame to the specified mac address.
2366 * This does not go through the normal mgt frame api so we
2367 * can specify the destination address and re-use the bss node
2368 * for the sta reference.
2371 ieee80211_send_proberesp(struct ieee80211vap *vap,
2372 const uint8_t da[IEEE80211_ADDR_LEN], int legacy)
2374 struct ieee80211_node *bss = vap->iv_bss;
2375 struct ieee80211com *ic = vap->iv_ic;
2376 struct ieee80211_frame *wh;
2379 if (vap->iv_state == IEEE80211_S_CAC) {
2380 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, bss,
2381 "block %s frame in CAC state", "probe response");
2382 vap->iv_stats.is_tx_badstate++;
2383 return EIO; /* XXX */
2387 * Hold a reference on the node so it doesn't go away until after
2388 * the xmit is complete all the way in the driver. On error we
2389 * will remove our reference.
2391 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2392 "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n",
2393 __func__, __LINE__, bss, bss->ni_macaddr, ":",
2394 ieee80211_node_refcnt(bss)+1);
2395 ieee80211_ref_node(bss);
2397 m = ieee80211_alloc_proberesp(bss, legacy);
2399 ieee80211_free_node(bss);
2403 M_PREPEND(m, sizeof(struct ieee80211_frame), MB_DONTWAIT);
2404 KASSERT(m != NULL, ("no room for header"));
2406 wh = mtod(m, struct ieee80211_frame *);
2407 ieee80211_send_setup(bss, m,
2408 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP,
2409 IEEE80211_NONQOS_TID, vap->iv_myaddr, da, bss->ni_bssid);
2410 /* XXX power management? */
2411 m->m_flags |= M_ENCAP; /* mark encapsulated */
2413 M_WME_SETAC(m, WME_AC_BE);
2415 IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS,
2416 "send probe resp on channel %u to %6D%s\n",
2417 ieee80211_chan2ieee(ic, ic->ic_curchan), da, ":",
2418 legacy ? " <legacy>" : "");
2419 IEEE80211_NODE_STAT(bss, tx_mgmt);
2421 return ic->ic_raw_xmit(bss, m, NULL);
2425 * Allocate and build a RTS (Request To Send) control frame.
2428 ieee80211_alloc_rts(struct ieee80211com *ic,
2429 const uint8_t ra[IEEE80211_ADDR_LEN],
2430 const uint8_t ta[IEEE80211_ADDR_LEN],
2433 struct ieee80211_frame_rts *rts;
2436 /* XXX honor ic_headroom */
2437 m = m_gethdr(MB_DONTWAIT, MT_DATA);
2439 rts = mtod(m, struct ieee80211_frame_rts *);
2440 rts->i_fc[0] = IEEE80211_FC0_VERSION_0 |
2441 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_RTS;
2442 rts->i_fc[1] = IEEE80211_FC1_DIR_NODS;
2443 *(u_int16_t *)rts->i_dur = htole16(dur);
2444 IEEE80211_ADDR_COPY(rts->i_ra, ra);
2445 IEEE80211_ADDR_COPY(rts->i_ta, ta);
2447 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_rts);
2453 * Allocate and build a CTS (Clear To Send) control frame.
2456 ieee80211_alloc_cts(struct ieee80211com *ic,
2457 const uint8_t ra[IEEE80211_ADDR_LEN], uint16_t dur)
2459 struct ieee80211_frame_cts *cts;
2462 /* XXX honor ic_headroom */
2463 m = m_gethdr(MB_DONTWAIT, MT_DATA);
2465 cts = mtod(m, struct ieee80211_frame_cts *);
2466 cts->i_fc[0] = IEEE80211_FC0_VERSION_0 |
2467 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_CTS;
2468 cts->i_fc[1] = IEEE80211_FC1_DIR_NODS;
2469 *(u_int16_t *)cts->i_dur = htole16(dur);
2470 IEEE80211_ADDR_COPY(cts->i_ra, ra);
2472 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_cts);
2478 ieee80211_tx_mgt_timeout(void *arg)
2480 struct ieee80211_node *ni = arg;
2481 struct ieee80211vap *vap = ni->ni_vap;
2483 if (vap->iv_state != IEEE80211_S_INIT &&
2484 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN) == 0) {
2486 * NB: it's safe to specify a timeout as the reason here;
2487 * it'll only be used in the right state.
2489 ieee80211_new_state(vap, IEEE80211_S_SCAN,
2490 IEEE80211_SCAN_FAIL_TIMEOUT);
2495 ieee80211_tx_mgt_cb(struct ieee80211_node *ni, void *arg, int status)
2497 struct ieee80211vap *vap = ni->ni_vap;
2498 enum ieee80211_state ostate = (enum ieee80211_state) arg;
2501 * Frame transmit completed; arrange timer callback. If
2502 * transmit was successfuly we wait for response. Otherwise
2503 * we arrange an immediate callback instead of doing the
2504 * callback directly since we don't know what state the driver
2505 * is in (e.g. what locks it is holding). This work should
2506 * not be too time-critical and not happen too often so the
2507 * added overhead is acceptable.
2509 * XXX what happens if !acked but response shows up before callback?
2511 if (vap->iv_state == ostate)
2512 callout_reset(&vap->iv_mgtsend,
2513 status == 0 ? IEEE80211_TRANS_WAIT*hz : 0,
2514 ieee80211_tx_mgt_timeout, ni);
2518 ieee80211_beacon_construct(struct mbuf *m, uint8_t *frm,
2519 struct ieee80211_beacon_offsets *bo, struct ieee80211_node *ni)
2521 struct ieee80211vap *vap = ni->ni_vap;
2522 struct ieee80211com *ic = ni->ni_ic;
2523 struct ieee80211_rateset *rs = &ni->ni_rates;
2527 * beacon frame format
2529 * [2] beacon interval
2530 * [2] cabability information
2532 * [tlv] supported rates
2533 * [3] parameter set (DS)
2534 * [8] CF parameter set (optional)
2535 * [tlv] parameter set (IBSS/TIM)
2536 * [tlv] country (optional)
2537 * [3] power control (optional)
2538 * [5] channel switch announcement (CSA) (optional)
2539 * [tlv] extended rate phy (ERP)
2540 * [tlv] extended supported rates
2541 * [tlv] RSN parameters
2542 * [tlv] HT capabilities
2543 * [tlv] HT information
2544 * XXX Vendor-specific OIDs (e.g. Atheros)
2545 * [tlv] WPA parameters
2546 * [tlv] WME parameters
2547 * [tlv] Vendor OUI HT capabilities (optional)
2548 * [tlv] Vendor OUI HT information (optional)
2549 * [tlv] Atheros capabilities (optional)
2550 * [tlv] TDMA parameters (optional)
2551 * [tlv] Mesh ID (MBSS)
2552 * [tlv] Mesh Conf (MBSS)
2553 * [tlv] application data (optional)
2556 memset(bo, 0, sizeof(*bo));
2558 memset(frm, 0, 8); /* XXX timestamp is set by hardware/driver */
2560 *(uint16_t *)frm = htole16(ni->ni_intval);
2562 capinfo = ieee80211_getcapinfo(vap, ni->ni_chan);
2563 bo->bo_caps = (uint16_t *)frm;
2564 *(uint16_t *)frm = htole16(capinfo);
2566 *frm++ = IEEE80211_ELEMID_SSID;
2567 if ((vap->iv_flags & IEEE80211_F_HIDESSID) == 0) {
2568 *frm++ = ni->ni_esslen;
2569 memcpy(frm, ni->ni_essid, ni->ni_esslen);
2570 frm += ni->ni_esslen;
2573 frm = ieee80211_add_rates(frm, rs);
2574 if (!IEEE80211_IS_CHAN_FHSS(ni->ni_chan)) {
2575 *frm++ = IEEE80211_ELEMID_DSPARMS;
2577 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan);
2579 if (ic->ic_flags & IEEE80211_F_PCF) {
2581 frm = ieee80211_add_cfparms(frm, ic);
2584 if (vap->iv_opmode == IEEE80211_M_IBSS) {
2585 *frm++ = IEEE80211_ELEMID_IBSSPARMS;
2587 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */
2589 } else if (vap->iv_opmode == IEEE80211_M_HOSTAP ||
2590 vap->iv_opmode == IEEE80211_M_MBSS) {
2591 /* TIM IE is the same for Mesh and Hostap */
2592 struct ieee80211_tim_ie *tie = (struct ieee80211_tim_ie *) frm;
2594 tie->tim_ie = IEEE80211_ELEMID_TIM;
2595 tie->tim_len = 4; /* length */
2596 tie->tim_count = 0; /* DTIM count */
2597 tie->tim_period = vap->iv_dtim_period; /* DTIM period */
2598 tie->tim_bitctl = 0; /* bitmap control */
2599 tie->tim_bitmap[0] = 0; /* Partial Virtual Bitmap */
2600 frm += sizeof(struct ieee80211_tim_ie);
2603 bo->bo_tim_trailer = frm;
2604 if ((vap->iv_flags & IEEE80211_F_DOTH) ||
2605 (vap->iv_flags_ext & IEEE80211_FEXT_DOTD))
2606 frm = ieee80211_add_countryie(frm, ic);
2607 if (vap->iv_flags & IEEE80211_F_DOTH) {
2608 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan))
2609 frm = ieee80211_add_powerconstraint(frm, vap);
2611 if (ic->ic_flags & IEEE80211_F_CSAPENDING)
2612 frm = ieee80211_add_csa(frm, vap);
2615 if (IEEE80211_IS_CHAN_ANYG(ni->ni_chan)) {
2617 frm = ieee80211_add_erp(frm, ic);
2619 frm = ieee80211_add_xrates(frm, rs);
2620 if (vap->iv_flags & IEEE80211_F_WPA2) {
2621 if (vap->iv_rsn_ie != NULL)
2622 frm = add_ie(frm, vap->iv_rsn_ie);
2623 /* XXX else complain */
2625 if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) {
2626 frm = ieee80211_add_htcap(frm, ni);
2627 bo->bo_htinfo = frm;
2628 frm = ieee80211_add_htinfo(frm, ni);
2630 if (vap->iv_flags & IEEE80211_F_WPA1) {
2631 if (vap->iv_wpa_ie != NULL)
2632 frm = add_ie(frm, vap->iv_wpa_ie);
2633 /* XXX else complain */
2635 if (vap->iv_flags & IEEE80211_F_WME) {
2637 frm = ieee80211_add_wme_param(frm, &ic->ic_wme);
2639 if (IEEE80211_IS_CHAN_HT(ni->ni_chan) &&
2640 (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT)) {
2641 frm = ieee80211_add_htcap_vendor(frm, ni);
2642 frm = ieee80211_add_htinfo_vendor(frm, ni);
2644 #ifdef IEEE80211_SUPPORT_SUPERG
2645 if (vap->iv_flags & IEEE80211_F_ATHEROS) {
2647 frm = ieee80211_add_athcaps(frm, ni);
2650 #ifdef IEEE80211_SUPPORT_TDMA
2651 if (vap->iv_caps & IEEE80211_C_TDMA) {
2653 frm = ieee80211_add_tdma(frm, vap);
2656 if (vap->iv_appie_beacon != NULL) {
2658 bo->bo_appie_len = vap->iv_appie_beacon->ie_len;
2659 frm = add_appie(frm, vap->iv_appie_beacon);
2661 #ifdef IEEE80211_SUPPORT_MESH
2662 if (vap->iv_opmode == IEEE80211_M_MBSS) {
2663 frm = ieee80211_add_meshid(frm, vap);
2664 bo->bo_meshconf = frm;
2665 frm = ieee80211_add_meshconf(frm, vap);
2668 bo->bo_tim_trailer_len = frm - bo->bo_tim_trailer;
2669 bo->bo_csa_trailer_len = frm - bo->bo_csa;
2670 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2674 * Allocate a beacon frame and fillin the appropriate bits.
2677 ieee80211_beacon_alloc(struct ieee80211_node *ni,
2678 struct ieee80211_beacon_offsets *bo)
2680 struct ieee80211vap *vap = ni->ni_vap;
2681 struct ieee80211com *ic = ni->ni_ic;
2682 struct ifnet *ifp = vap->iv_ifp;
2683 struct ieee80211_frame *wh;
2689 * beacon frame format
2691 * [2] beacon interval
2692 * [2] cabability information
2694 * [tlv] supported rates
2695 * [3] parameter set (DS)
2696 * [8] CF parameter set (optional)
2697 * [tlv] parameter set (IBSS/TIM)
2698 * [tlv] country (optional)
2699 * [3] power control (optional)
2700 * [5] channel switch announcement (CSA) (optional)
2701 * [tlv] extended rate phy (ERP)
2702 * [tlv] extended supported rates
2703 * [tlv] RSN parameters
2704 * [tlv] HT capabilities
2705 * [tlv] HT information
2706 * [tlv] Vendor OUI HT capabilities (optional)
2707 * [tlv] Vendor OUI HT information (optional)
2708 * XXX Vendor-specific OIDs (e.g. Atheros)
2709 * [tlv] WPA parameters
2710 * [tlv] WME parameters
2711 * [tlv] TDMA parameters (optional)
2712 * [tlv] Mesh ID (MBSS)
2713 * [tlv] Mesh Conf (MBSS)
2714 * [tlv] application data (optional)
2715 * NB: we allocate the max space required for the TIM bitmap.
2716 * XXX how big is this?
2718 pktlen = 8 /* time stamp */
2719 + sizeof(uint16_t) /* beacon interval */
2720 + sizeof(uint16_t) /* capabilities */
2721 + 2 + ni->ni_esslen /* ssid */
2722 + 2 + IEEE80211_RATE_SIZE /* supported rates */
2723 + 2 + 1 /* DS parameters */
2724 + 2 + 6 /* CF parameters */
2725 + 2 + 4 + vap->iv_tim_len /* DTIM/IBSSPARMS */
2726 + IEEE80211_COUNTRY_MAX_SIZE /* country */
2727 + 2 + 1 /* power control */
2728 + sizeof(struct ieee80211_csa_ie) /* CSA */
2730 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2731 + (vap->iv_caps & IEEE80211_C_WPA ? /* WPA 1+2 */
2732 2*sizeof(struct ieee80211_ie_wpa) : 0)
2733 /* XXX conditional? */
2734 + 4+2*sizeof(struct ieee80211_ie_htcap)/* HT caps */
2735 + 4+2*sizeof(struct ieee80211_ie_htinfo)/* HT info */
2736 + (vap->iv_caps & IEEE80211_C_WME ? /* WME */
2737 sizeof(struct ieee80211_wme_param) : 0)
2738 #ifdef IEEE80211_SUPPORT_SUPERG
2739 + sizeof(struct ieee80211_ath_ie) /* ATH */
2741 #ifdef IEEE80211_SUPPORT_TDMA
2742 + (vap->iv_caps & IEEE80211_C_TDMA ? /* TDMA */
2743 sizeof(struct ieee80211_tdma_param) : 0)
2745 #ifdef IEEE80211_SUPPORT_MESH
2746 + 2 + ni->ni_meshidlen
2747 + sizeof(struct ieee80211_meshconf_ie)
2749 + IEEE80211_MAX_APPIE
2751 m = ieee80211_getmgtframe(&frm,
2752 ic->ic_headroom + sizeof(struct ieee80211_frame), pktlen);
2754 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
2755 "%s: cannot get buf; size %u\n", __func__, pktlen);
2756 vap->iv_stats.is_tx_nobuf++;
2759 ieee80211_beacon_construct(m, frm, bo, ni);
2761 M_PREPEND(m, sizeof(struct ieee80211_frame), MB_DONTWAIT);
2762 KASSERT(m != NULL, ("no space for 802.11 header?"));
2763 wh = mtod(m, struct ieee80211_frame *);
2764 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT |
2765 IEEE80211_FC0_SUBTYPE_BEACON;
2766 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
2767 *(uint16_t *)wh->i_dur = 0;
2768 IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr);
2769 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
2770 IEEE80211_ADDR_COPY(wh->i_addr3, ni->ni_bssid);
2771 *(uint16_t *)wh->i_seq = 0;
2777 * Update the dynamic parts of a beacon frame based on the current state.
2780 ieee80211_beacon_update(struct ieee80211_node *ni,
2781 struct ieee80211_beacon_offsets *bo, struct mbuf *m, int mcast)
2783 struct ieee80211vap *vap = ni->ni_vap;
2784 struct ieee80211com *ic = ni->ni_ic;
2785 int len_changed = 0;
2790 * Handle 11h channel change when we've reached the count.
2791 * We must recalculate the beacon frame contents to account
2792 * for the new channel. Note we do this only for the first
2793 * vap that reaches this point; subsequent vaps just update
2794 * their beacon state to reflect the recalculated channel.
2796 if (isset(bo->bo_flags, IEEE80211_BEACON_CSA) &&
2797 vap->iv_csa_count == ic->ic_csa_count) {
2798 vap->iv_csa_count = 0;
2800 * Effect channel change before reconstructing the beacon
2801 * frame contents as many places reference ni_chan.
2803 if (ic->ic_csa_newchan != NULL)
2804 ieee80211_csa_completeswitch(ic);
2806 * NB: ieee80211_beacon_construct clears all pending
2807 * updates in bo_flags so we don't need to explicitly
2808 * clear IEEE80211_BEACON_CSA.
2810 ieee80211_beacon_construct(m,
2811 mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), bo, ni);
2813 /* XXX do WME aggressive mode processing? */
2814 IEEE80211_UNLOCK(ic);
2815 return 1; /* just assume length changed */
2818 /* XXX faster to recalculate entirely or just changes? */
2819 capinfo = ieee80211_getcapinfo(vap, ni->ni_chan);
2820 *bo->bo_caps = htole16(capinfo);
2822 if (vap->iv_flags & IEEE80211_F_WME) {
2823 struct ieee80211_wme_state *wme = &ic->ic_wme;
2826 * Check for agressive mode change. When there is
2827 * significant high priority traffic in the BSS
2828 * throttle back BE traffic by using conservative
2829 * parameters. Otherwise BE uses agressive params
2830 * to optimize performance of legacy/non-QoS traffic.
2832 if (wme->wme_flags & WME_F_AGGRMODE) {
2833 if (wme->wme_hipri_traffic >
2834 wme->wme_hipri_switch_thresh) {
2835 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
2836 "%s: traffic %u, disable aggressive mode\n",
2837 __func__, wme->wme_hipri_traffic);
2838 wme->wme_flags &= ~WME_F_AGGRMODE;
2839 ieee80211_wme_updateparams_locked(vap);
2840 wme->wme_hipri_traffic =
2841 wme->wme_hipri_switch_hysteresis;
2843 wme->wme_hipri_traffic = 0;
2845 if (wme->wme_hipri_traffic <=
2846 wme->wme_hipri_switch_thresh) {
2847 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
2848 "%s: traffic %u, enable aggressive mode\n",
2849 __func__, wme->wme_hipri_traffic);
2850 wme->wme_flags |= WME_F_AGGRMODE;
2851 ieee80211_wme_updateparams_locked(vap);
2852 wme->wme_hipri_traffic = 0;
2854 wme->wme_hipri_traffic =
2855 wme->wme_hipri_switch_hysteresis;
2857 if (isset(bo->bo_flags, IEEE80211_BEACON_WME)) {
2858 (void) ieee80211_add_wme_param(bo->bo_wme, wme);
2859 clrbit(bo->bo_flags, IEEE80211_BEACON_WME);
2863 if (isset(bo->bo_flags, IEEE80211_BEACON_HTINFO)) {
2864 ieee80211_ht_update_beacon(vap, bo);
2865 clrbit(bo->bo_flags, IEEE80211_BEACON_HTINFO);
2867 #ifdef IEEE80211_SUPPORT_TDMA
2868 if (vap->iv_caps & IEEE80211_C_TDMA) {
2870 * NB: the beacon is potentially updated every TBTT.
2872 ieee80211_tdma_update_beacon(vap, bo);
2875 #ifdef IEEE80211_SUPPORT_MESH
2876 if (vap->iv_opmode == IEEE80211_M_MBSS)
2877 ieee80211_mesh_update_beacon(vap, bo);
2880 if (vap->iv_opmode == IEEE80211_M_HOSTAP ||
2881 vap->iv_opmode == IEEE80211_M_MBSS) { /* NB: no IBSS support*/
2882 struct ieee80211_tim_ie *tie =
2883 (struct ieee80211_tim_ie *) bo->bo_tim;
2884 if (isset(bo->bo_flags, IEEE80211_BEACON_TIM)) {
2885 u_int timlen, timoff, i;
2887 * ATIM/DTIM needs updating. If it fits in the
2888 * current space allocated then just copy in the
2889 * new bits. Otherwise we need to move any trailing
2890 * data to make room. Note that we know there is
2891 * contiguous space because ieee80211_beacon_allocate
2892 * insures there is space in the mbuf to write a
2893 * maximal-size virtual bitmap (based on iv_max_aid).
2896 * Calculate the bitmap size and offset, copy any
2897 * trailer out of the way, and then copy in the
2898 * new bitmap and update the information element.
2899 * Note that the tim bitmap must contain at least
2900 * one byte and any offset must be even.
2902 if (vap->iv_ps_pending != 0) {
2903 timoff = 128; /* impossibly large */
2904 for (i = 0; i < vap->iv_tim_len; i++)
2905 if (vap->iv_tim_bitmap[i]) {
2909 KASSERT(timoff != 128, ("tim bitmap empty!"));
2910 for (i = vap->iv_tim_len-1; i >= timoff; i--)
2911 if (vap->iv_tim_bitmap[i])
2913 timlen = 1 + (i - timoff);
2918 if (timlen != bo->bo_tim_len) {
2919 /* copy up/down trailer */
2920 int adjust = tie->tim_bitmap+timlen
2921 - bo->bo_tim_trailer;
2922 ovbcopy(bo->bo_tim_trailer,
2923 bo->bo_tim_trailer+adjust,
2924 bo->bo_tim_trailer_len);
2925 bo->bo_tim_trailer += adjust;
2926 bo->bo_erp += adjust;
2927 bo->bo_htinfo += adjust;
2928 #ifdef IEEE80211_SUPERG_SUPPORT
2929 bo->bo_ath += adjust;
2931 #ifdef IEEE80211_TDMA_SUPPORT
2932 bo->bo_tdma += adjust;
2934 #ifdef IEEE80211_MESH_SUPPORT
2935 bo->bo_meshconf += adjust;
2937 bo->bo_appie += adjust;
2938 bo->bo_wme += adjust;
2939 bo->bo_csa += adjust;
2940 bo->bo_tim_len = timlen;
2942 /* update information element */
2943 tie->tim_len = 3 + timlen;
2944 tie->tim_bitctl = timoff;
2947 memcpy(tie->tim_bitmap, vap->iv_tim_bitmap + timoff,
2950 clrbit(bo->bo_flags, IEEE80211_BEACON_TIM);
2952 IEEE80211_DPRINTF(vap, IEEE80211_MSG_POWER,
2953 "%s: TIM updated, pending %u, off %u, len %u\n",
2954 __func__, vap->iv_ps_pending, timoff, timlen);
2956 /* count down DTIM period */
2957 if (tie->tim_count == 0)
2958 tie->tim_count = tie->tim_period - 1;
2961 /* update state for buffered multicast frames on DTIM */
2962 if (mcast && tie->tim_count == 0)
2963 tie->tim_bitctl |= 1;
2965 tie->tim_bitctl &= ~1;
2966 if (isset(bo->bo_flags, IEEE80211_BEACON_CSA)) {
2967 struct ieee80211_csa_ie *csa =
2968 (struct ieee80211_csa_ie *) bo->bo_csa;
2971 * Insert or update CSA ie. If we're just starting
2972 * to count down to the channel switch then we need
2973 * to insert the CSA ie. Otherwise we just need to
2974 * drop the count. The actual change happens above
2975 * when the vap's count reaches the target count.
2977 if (vap->iv_csa_count == 0) {
2978 memmove(&csa[1], csa, bo->bo_csa_trailer_len);
2979 bo->bo_erp += sizeof(*csa);
2980 bo->bo_htinfo += sizeof(*csa);
2981 bo->bo_wme += sizeof(*csa);
2982 #ifdef IEEE80211_SUPERG_SUPPORT
2983 bo->bo_ath += sizeof(*csa);
2985 #ifdef IEEE80211_TDMA_SUPPORT
2986 bo->bo_tdma += sizeof(*csa);
2988 #ifdef IEEE80211_MESH_SUPPORT
2989 bo->bo_meshconf += sizeof(*csa);
2991 bo->bo_appie += sizeof(*csa);
2992 bo->bo_csa_trailer_len += sizeof(*csa);
2993 bo->bo_tim_trailer_len += sizeof(*csa);
2994 m->m_len += sizeof(*csa);
2995 m->m_pkthdr.len += sizeof(*csa);
2997 ieee80211_add_csa(bo->bo_csa, vap);
3000 vap->iv_csa_count++;
3001 /* NB: don't clear IEEE80211_BEACON_CSA */
3003 if (isset(bo->bo_flags, IEEE80211_BEACON_ERP)) {
3005 * ERP element needs updating.
3007 (void) ieee80211_add_erp(bo->bo_erp, ic);
3008 clrbit(bo->bo_flags, IEEE80211_BEACON_ERP);
3010 #ifdef IEEE80211_SUPPORT_SUPERG
3011 if (isset(bo->bo_flags, IEEE80211_BEACON_ATH)) {
3012 ieee80211_add_athcaps(bo->bo_ath, ni);
3013 clrbit(bo->bo_flags, IEEE80211_BEACON_ATH);
3017 if (isset(bo->bo_flags, IEEE80211_BEACON_APPIE)) {
3018 const struct ieee80211_appie *aie = vap->iv_appie_beacon;
3024 aielen += aie->ie_len;
3025 if (aielen != bo->bo_appie_len) {
3026 /* copy up/down trailer */
3027 int adjust = aielen - bo->bo_appie_len;
3028 ovbcopy(bo->bo_tim_trailer, bo->bo_tim_trailer+adjust,
3029 bo->bo_tim_trailer_len);
3030 bo->bo_tim_trailer += adjust;
3031 bo->bo_appie += adjust;
3032 bo->bo_appie_len = aielen;
3038 frm = add_appie(frm, aie);
3039 clrbit(bo->bo_flags, IEEE80211_BEACON_APPIE);
3041 IEEE80211_UNLOCK(ic);