2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2001 Atsushi Onoe
5 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
33 #include "opt_inet6.h"
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/kernel.h>
39 #include <sys/malloc.h>
41 #include <sys/endian.h>
43 #include <sys/socket.h>
46 #include <net/ethernet.h>
48 #include <net/if_var.h>
49 #include <net/if_llc.h>
50 #include <net/if_media.h>
51 #include <net/if_vlan_var.h>
53 #include <net80211/ieee80211_var.h>
54 #include <net80211/ieee80211_regdomain.h>
55 #ifdef IEEE80211_SUPPORT_SUPERG
56 #include <net80211/ieee80211_superg.h>
58 #ifdef IEEE80211_SUPPORT_TDMA
59 #include <net80211/ieee80211_tdma.h>
61 #include <net80211/ieee80211_wds.h>
62 #include <net80211/ieee80211_mesh.h>
63 #include <net80211/ieee80211_vht.h>
65 #if defined(INET) || defined(INET6)
66 #include <netinet/in.h>
70 #include <netinet/if_ether.h>
71 #include <netinet/in_systm.h>
72 #include <netinet/ip.h>
75 #include <netinet/ip6.h>
78 #include <security/mac/mac_framework.h>
80 #define ETHER_HEADER_COPY(dst, src) \
81 memcpy(dst, src, sizeof(struct ether_header))
83 static int ieee80211_fragment(struct ieee80211vap *, struct mbuf *,
84 u_int hdrsize, u_int ciphdrsize, u_int mtu);
85 static void ieee80211_tx_mgt_cb(struct ieee80211_node *, void *, int);
87 #ifdef IEEE80211_DEBUG
89 * Decide if an outbound management frame should be
90 * printed when debugging is enabled. This filters some
91 * of the less interesting frames that come frequently
95 doprint(struct ieee80211vap *vap, int subtype)
98 case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
99 return (vap->iv_opmode == IEEE80211_M_IBSS);
106 * Transmit a frame to the given destination on the given VAP.
108 * It's up to the caller to figure out the details of who this
109 * is going to and resolving the node.
111 * This routine takes care of queuing it for power save,
112 * A-MPDU state stuff, fast-frames state stuff, encapsulation
113 * if required, then passing it up to the driver layer.
115 * This routine (for now) consumes the mbuf and frees the node
116 * reference; it ideally will return a TX status which reflects
117 * whether the mbuf was consumed or not, so the caller can
118 * free the mbuf (if appropriate) and the node reference (again,
122 ieee80211_vap_pkt_send_dest(struct ieee80211vap *vap, struct mbuf *m,
123 struct ieee80211_node *ni)
125 struct ieee80211com *ic = vap->iv_ic;
126 struct ifnet *ifp = vap->iv_ifp;
129 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) &&
130 (m->m_flags & M_PWR_SAV) == 0) {
132 * Station in power save mode; pass the frame
133 * to the 802.11 layer and continue. We'll get
134 * the frame back when the time is right.
135 * XXX lose WDS vap linkage?
137 if (ieee80211_pwrsave(ni, m) != 0)
138 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
139 ieee80211_free_node(ni);
142 * We queued it fine, so tell the upper layer
143 * that we consumed it.
147 /* calculate priority so drivers can find the tx queue */
148 if (ieee80211_classify(ni, m)) {
149 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT,
150 ni->ni_macaddr, NULL,
151 "%s", "classification failure");
152 vap->iv_stats.is_tx_classify++;
153 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
155 ieee80211_free_node(ni);
157 /* XXX better status? */
161 * Stash the node pointer. Note that we do this after
162 * any call to ieee80211_dwds_mcast because that code
163 * uses any existing value for rcvif to identify the
164 * interface it (might have been) received on.
166 m->m_pkthdr.rcvif = (void *)ni;
167 mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1: 0;
169 BPF_MTAP(ifp, m); /* 802.3 tx */
172 * Check if A-MPDU tx aggregation is setup or if we
173 * should try to enable it. The sta must be associated
174 * with HT and A-MPDU enabled for use. When the policy
175 * routine decides we should enable A-MPDU we issue an
176 * ADDBA request and wait for a reply. The frame being
177 * encapsulated will go out w/o using A-MPDU, or possibly
178 * it might be collected by the driver and held/retransmit.
179 * The default ic_ampdu_enable routine handles staggering
180 * ADDBA requests in case the receiver NAK's us or we are
181 * otherwise unable to establish a BA stream.
183 * Don't treat group-addressed frames as candidates for aggregation;
184 * net80211 doesn't support 802.11aa-2012 and so group addressed
185 * frames will always have sequence numbers allocated from the NON_QOS
188 if ((ni->ni_flags & IEEE80211_NODE_AMPDU_TX) &&
189 (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_TX)) {
190 if ((m->m_flags & M_EAPOL) == 0 && (! mcast)) {
191 int tid = WME_AC_TO_TID(M_WME_GETAC(m));
192 struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[tid];
194 ieee80211_txampdu_count_packet(tap);
195 if (IEEE80211_AMPDU_RUNNING(tap)) {
197 * Operational, mark frame for aggregation.
199 * XXX do tx aggregation here
201 m->m_flags |= M_AMPDU_MPDU;
202 } else if (!IEEE80211_AMPDU_REQUESTED(tap) &&
203 ic->ic_ampdu_enable(ni, tap)) {
205 * Not negotiated yet, request service.
207 ieee80211_ampdu_request(ni, tap);
208 /* XXX hold frame for reply? */
213 #ifdef IEEE80211_SUPPORT_SUPERG
215 * Check for AMSDU/FF; queue for aggregation
217 * Note: we don't bother trying to do fast frames or
218 * A-MSDU encapsulation for 802.3 drivers. Now, we
219 * likely could do it for FF (because it's a magic
220 * atheros tunnel LLC type) but I don't think we're going
221 * to really need to. For A-MSDU we'd have to set the
222 * A-MSDU QoS bit in the wifi header, so we just plain
225 * Strictly speaking, we could actually /do/ A-MSDU / FF
226 * with A-MPDU together which for certain circumstances
227 * is beneficial (eg A-MSDU of TCK ACKs.) However,
228 * I'll ignore that for now so existing behaviour is maintained.
229 * Later on it would be good to make "amsdu + ampdu" configurable.
231 else if (__predict_true((vap->iv_caps & IEEE80211_C_8023ENCAP) == 0)) {
232 if ((! mcast) && ieee80211_amsdu_tx_ok(ni)) {
233 m = ieee80211_amsdu_check(ni, m);
235 /* NB: any ni ref held on stageq */
236 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
237 "%s: amsdu_check queued frame\n",
241 } else if ((! mcast) && IEEE80211_ATH_CAP(vap, ni,
242 IEEE80211_NODE_FF)) {
243 m = ieee80211_ff_check(ni, m);
245 /* NB: any ni ref held on stageq */
246 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
247 "%s: ff_check queued frame\n",
253 #endif /* IEEE80211_SUPPORT_SUPERG */
256 * Grab the TX lock - serialise the TX process from this
257 * point (where TX state is being checked/modified)
258 * through to driver queue.
260 IEEE80211_TX_LOCK(ic);
263 * XXX make the encap and transmit code a separate function
264 * so things like the FF (and later A-MSDU) path can just call
265 * it for flushed frames.
267 if (__predict_true((vap->iv_caps & IEEE80211_C_8023ENCAP) == 0)) {
269 * Encapsulate the packet in prep for transmission.
271 m = ieee80211_encap(vap, ni, m);
273 /* NB: stat+msg handled in ieee80211_encap */
274 IEEE80211_TX_UNLOCK(ic);
275 ieee80211_free_node(ni);
276 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
280 (void) ieee80211_parent_xmitpkt(ic, m);
283 * Unlock at this point - no need to hold it across
284 * ieee80211_free_node() (ie, the comlock)
286 IEEE80211_TX_UNLOCK(ic);
287 ic->ic_lastdata = ticks;
295 * Send the given mbuf through the given vap.
297 * This consumes the mbuf regardless of whether the transmit
298 * was successful or not.
300 * This does none of the initial checks that ieee80211_start()
301 * does (eg CAC timeout, interface wakeup) - the caller must
305 ieee80211_start_pkt(struct ieee80211vap *vap, struct mbuf *m)
307 #define IS_DWDS(vap) \
308 (vap->iv_opmode == IEEE80211_M_WDS && \
309 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0)
310 struct ieee80211com *ic = vap->iv_ic;
311 struct ifnet *ifp = vap->iv_ifp;
312 struct ieee80211_node *ni;
313 struct ether_header *eh;
316 * Cancel any background scan.
318 if (ic->ic_flags & IEEE80211_F_SCAN)
319 ieee80211_cancel_anyscan(vap);
321 * Find the node for the destination so we can do
322 * things like power save and fast frames aggregation.
324 * NB: past this point various code assumes the first
325 * mbuf has the 802.3 header present (and contiguous).
328 if (m->m_len < sizeof(struct ether_header) &&
329 (m = m_pullup(m, sizeof(struct ether_header))) == NULL) {
330 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
331 "discard frame, %s\n", "m_pullup failed");
332 vap->iv_stats.is_tx_nobuf++; /* XXX */
333 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
336 eh = mtod(m, struct ether_header *);
337 if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
340 * Only unicast frames from the above go out
341 * DWDS vaps; multicast frames are handled by
342 * dispatching the frame as it comes through
343 * the AP vap (see below).
345 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_WDS,
346 eh->ether_dhost, "mcast", "%s", "on DWDS");
347 vap->iv_stats.is_dwds_mcast++;
349 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
350 /* XXX better status? */
353 if (vap->iv_opmode == IEEE80211_M_HOSTAP) {
355 * Spam DWDS vap's w/ multicast traffic.
357 /* XXX only if dwds in use? */
358 ieee80211_dwds_mcast(vap, m);
361 #ifdef IEEE80211_SUPPORT_MESH
362 if (vap->iv_opmode != IEEE80211_M_MBSS) {
364 ni = ieee80211_find_txnode(vap, eh->ether_dhost);
366 /* NB: ieee80211_find_txnode does stat+msg */
367 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
369 /* XXX better status? */
372 if (ni->ni_associd == 0 &&
373 (ni->ni_flags & IEEE80211_NODE_ASSOCID)) {
374 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT,
375 eh->ether_dhost, NULL,
376 "sta not associated (type 0x%04x)",
377 htons(eh->ether_type));
378 vap->iv_stats.is_tx_notassoc++;
379 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
381 ieee80211_free_node(ni);
382 /* XXX better status? */
385 #ifdef IEEE80211_SUPPORT_MESH
387 if (!IEEE80211_ADDR_EQ(eh->ether_shost, vap->iv_myaddr)) {
389 * Proxy station only if configured.
391 if (!ieee80211_mesh_isproxyena(vap)) {
392 IEEE80211_DISCARD_MAC(vap,
393 IEEE80211_MSG_OUTPUT |
395 eh->ether_dhost, NULL,
396 "%s", "proxy not enabled");
397 vap->iv_stats.is_mesh_notproxy++;
398 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
400 /* XXX better status? */
403 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
404 "forward frame from DS SA(%6D), DA(%6D)\n",
405 eh->ether_shost, ":",
406 eh->ether_dhost, ":");
407 ieee80211_mesh_proxy_check(vap, eh->ether_shost);
409 ni = ieee80211_mesh_discover(vap, eh->ether_dhost, m);
412 * NB: ieee80211_mesh_discover holds/disposes
413 * frame (e.g. queueing on path discovery).
415 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
416 /* XXX better status? */
423 * We've resolved the sender, so attempt to transmit it.
426 if (vap->iv_state == IEEE80211_S_SLEEP) {
428 * In power save; queue frame and then wakeup device
431 ic->ic_lastdata = ticks;
432 if (ieee80211_pwrsave(ni, m) != 0)
433 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
434 ieee80211_free_node(ni);
435 ieee80211_new_state(vap, IEEE80211_S_RUN, 0);
439 if (ieee80211_vap_pkt_send_dest(vap, m, ni) != 0)
446 * Start method for vap's. All packets from the stack come
447 * through here. We handle common processing of the packets
448 * before dispatching them to the underlying device.
450 * if_transmit() requires that the mbuf be consumed by this call
451 * regardless of the return condition.
454 ieee80211_vap_transmit(struct ifnet *ifp, struct mbuf *m)
456 struct ieee80211vap *vap = ifp->if_softc;
457 struct ieee80211com *ic = vap->iv_ic;
460 * No data frames go out unless we're running.
461 * Note in particular this covers CAC and CSA
462 * states (though maybe we should check muting
465 if (vap->iv_state != IEEE80211_S_RUN &&
466 vap->iv_state != IEEE80211_S_SLEEP) {
468 /* re-check under the com lock to avoid races */
469 if (vap->iv_state != IEEE80211_S_RUN &&
470 vap->iv_state != IEEE80211_S_SLEEP) {
471 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
472 "%s: ignore queue, in %s state\n",
473 __func__, ieee80211_state_name[vap->iv_state]);
474 vap->iv_stats.is_tx_badstate++;
475 IEEE80211_UNLOCK(ic);
476 ifp->if_drv_flags |= IFF_DRV_OACTIVE;
478 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
481 IEEE80211_UNLOCK(ic);
485 * Sanitize mbuf flags for net80211 use. We cannot
486 * clear M_PWR_SAV or M_MORE_DATA because these may
487 * be set for frames that are re-submitted from the
490 * NB: This must be done before ieee80211_classify as
491 * it marks EAPOL in frames with M_EAPOL.
493 m->m_flags &= ~(M_80211_TX - M_PWR_SAV - M_MORE_DATA);
496 * Bump to the packet transmission path.
497 * The mbuf will be consumed here.
499 return (ieee80211_start_pkt(vap, m));
503 ieee80211_vap_qflush(struct ifnet *ifp)
510 * 802.11 raw output routine.
512 * XXX TODO: this (and other send routines) should correctly
513 * XXX keep the pwr mgmt bit set if it decides to call into the
514 * XXX driver to send a frame whilst the state is SLEEP.
516 * Otherwise the peer may decide that we're awake and flood us
517 * with traffic we are still too asleep to receive!
520 ieee80211_raw_output(struct ieee80211vap *vap, struct ieee80211_node *ni,
521 struct mbuf *m, const struct ieee80211_bpf_params *params)
523 struct ieee80211com *ic = vap->iv_ic;
527 * Set node - the caller has taken a reference, so ensure
528 * that the mbuf has the same node value that
529 * it would if it were going via the normal path.
531 m->m_pkthdr.rcvif = (void *)ni;
534 * Attempt to add bpf transmit parameters.
536 * For now it's ok to fail; the raw_xmit api still takes
539 * Later on when ic_raw_xmit() has params removed,
540 * they'll have to be added - so fail the transmit if
544 (void) ieee80211_add_xmit_params(m, params);
546 error = ic->ic_raw_xmit(ni, m, params);
548 if_inc_counter(vap->iv_ifp, IFCOUNTER_OERRORS, 1);
549 ieee80211_free_node(ni);
555 ieee80211_validate_frame(struct mbuf *m,
556 const struct ieee80211_bpf_params *params)
558 struct ieee80211_frame *wh;
561 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_ack))
564 wh = mtod(m, struct ieee80211_frame *);
565 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
566 IEEE80211_FC0_VERSION_0)
569 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
570 if (type != IEEE80211_FC0_TYPE_DATA) {
571 if ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) !=
572 IEEE80211_FC1_DIR_NODS)
575 if (type != IEEE80211_FC0_TYPE_MGT &&
576 (wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG) != 0)
579 /* XXX skip other field checks? */
582 if ((params && (params->ibp_flags & IEEE80211_BPF_CRYPTO) != 0) ||
583 (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) != 0) {
586 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
589 * See IEEE Std 802.11-2012,
590 * 8.2.4.1.9 'Protected Frame field'
592 /* XXX no support for robust management frames yet. */
593 if (!(type == IEEE80211_FC0_TYPE_DATA ||
594 (type == IEEE80211_FC0_TYPE_MGT &&
595 subtype == IEEE80211_FC0_SUBTYPE_AUTH)))
598 wh->i_fc[1] |= IEEE80211_FC1_PROTECTED;
601 if (m->m_pkthdr.len < ieee80211_anyhdrsize(wh))
608 * 802.11 output routine. This is (currently) used only to
609 * connect bpf write calls to the 802.11 layer for injecting
613 ieee80211_output(struct ifnet *ifp, struct mbuf *m,
614 const struct sockaddr *dst, struct route *ro)
616 #define senderr(e) do { error = (e); goto bad;} while (0)
617 const struct ieee80211_bpf_params *params = NULL;
618 struct ieee80211_node *ni = NULL;
619 struct ieee80211vap *vap;
620 struct ieee80211_frame *wh;
621 struct ieee80211com *ic = NULL;
625 if (ifp->if_drv_flags & IFF_DRV_OACTIVE) {
627 * Short-circuit requests if the vap is marked OACTIVE
628 * as this can happen because a packet came down through
629 * ieee80211_start before the vap entered RUN state in
630 * which case it's ok to just drop the frame. This
631 * should not be necessary but callers of if_output don't
639 * Hand to the 802.3 code if not tagged as
640 * a raw 802.11 frame.
642 if (dst->sa_family != AF_IEEE80211)
643 return vap->iv_output(ifp, m, dst, ro);
645 error = mac_ifnet_check_transmit(ifp, m);
649 if (ifp->if_flags & IFF_MONITOR)
651 if (!IFNET_IS_UP_RUNNING(ifp))
653 if (vap->iv_state == IEEE80211_S_CAC) {
654 IEEE80211_DPRINTF(vap,
655 IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH,
656 "block %s frame in CAC state\n", "raw data");
657 vap->iv_stats.is_tx_badstate++;
658 senderr(EIO); /* XXX */
659 } else if (vap->iv_state == IEEE80211_S_SCAN)
661 /* XXX bypass bridge, pfil, carp, etc. */
664 * NB: DLT_IEEE802_11_RADIO identifies the parameters are
665 * present by setting the sa_len field of the sockaddr (yes,
667 * NB: we assume sa_data is suitably aligned to cast.
669 if (dst->sa_len != 0)
670 params = (const struct ieee80211_bpf_params *)dst->sa_data;
672 error = ieee80211_validate_frame(m, params);
676 wh = mtod(m, struct ieee80211_frame *);
678 /* locate destination node */
679 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) {
680 case IEEE80211_FC1_DIR_NODS:
681 case IEEE80211_FC1_DIR_FROMDS:
682 ni = ieee80211_find_txnode(vap, wh->i_addr1);
684 case IEEE80211_FC1_DIR_TODS:
685 case IEEE80211_FC1_DIR_DSTODS:
686 ni = ieee80211_find_txnode(vap, wh->i_addr3);
693 * Permit packets w/ bpf params through regardless
694 * (see below about sa_len).
696 if (dst->sa_len == 0)
697 senderr(EHOSTUNREACH);
698 ni = ieee80211_ref_node(vap->iv_bss);
702 * Sanitize mbuf for net80211 flags leaked from above.
704 * NB: This must be done before ieee80211_classify as
705 * it marks EAPOL in frames with M_EAPOL.
707 m->m_flags &= ~M_80211_TX;
708 m->m_flags |= M_ENCAP; /* mark encapsulated */
710 if (IEEE80211_IS_DATA(wh)) {
711 /* calculate priority so drivers can find the tx queue */
712 if (ieee80211_classify(ni, m))
713 senderr(EIO); /* XXX */
715 /* NB: ieee80211_encap does not include 802.11 header */
716 IEEE80211_NODE_STAT_ADD(ni, tx_bytes,
717 m->m_pkthdr.len - ieee80211_hdrsize(wh));
719 M_WME_SETAC(m, WME_AC_BE);
721 IEEE80211_NODE_STAT(ni, tx_data);
722 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
723 IEEE80211_NODE_STAT(ni, tx_mcast);
724 m->m_flags |= M_MCAST;
726 IEEE80211_NODE_STAT(ni, tx_ucast);
728 IEEE80211_TX_LOCK(ic);
729 ret = ieee80211_raw_output(vap, ni, m, params);
730 IEEE80211_TX_UNLOCK(ic);
736 ieee80211_free_node(ni);
737 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
743 * Set the direction field and address fields of an outgoing
744 * frame. Note this should be called early on in constructing
745 * a frame as it sets i_fc[1]; other bits can then be or'd in.
748 ieee80211_send_setup(
749 struct ieee80211_node *ni,
752 const uint8_t sa[IEEE80211_ADDR_LEN],
753 const uint8_t da[IEEE80211_ADDR_LEN],
754 const uint8_t bssid[IEEE80211_ADDR_LEN])
756 #define WH4(wh) ((struct ieee80211_frame_addr4 *)wh)
757 struct ieee80211vap *vap = ni->ni_vap;
758 struct ieee80211_tx_ampdu *tap;
759 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
762 IEEE80211_TX_LOCK_ASSERT(ni->ni_ic);
764 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | type;
765 if ((type & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_DATA) {
766 switch (vap->iv_opmode) {
767 case IEEE80211_M_STA:
768 wh->i_fc[1] = IEEE80211_FC1_DIR_TODS;
769 IEEE80211_ADDR_COPY(wh->i_addr1, bssid);
770 IEEE80211_ADDR_COPY(wh->i_addr2, sa);
771 IEEE80211_ADDR_COPY(wh->i_addr3, da);
773 case IEEE80211_M_IBSS:
774 case IEEE80211_M_AHDEMO:
775 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
776 IEEE80211_ADDR_COPY(wh->i_addr1, da);
777 IEEE80211_ADDR_COPY(wh->i_addr2, sa);
778 IEEE80211_ADDR_COPY(wh->i_addr3, bssid);
780 case IEEE80211_M_HOSTAP:
781 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
782 IEEE80211_ADDR_COPY(wh->i_addr1, da);
783 IEEE80211_ADDR_COPY(wh->i_addr2, bssid);
784 IEEE80211_ADDR_COPY(wh->i_addr3, sa);
786 case IEEE80211_M_WDS:
787 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS;
788 IEEE80211_ADDR_COPY(wh->i_addr1, da);
789 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
790 IEEE80211_ADDR_COPY(wh->i_addr3, da);
791 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa);
793 case IEEE80211_M_MBSS:
794 #ifdef IEEE80211_SUPPORT_MESH
795 if (IEEE80211_IS_MULTICAST(da)) {
796 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
798 IEEE80211_ADDR_COPY(wh->i_addr1, da);
799 IEEE80211_ADDR_COPY(wh->i_addr2,
802 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS;
803 IEEE80211_ADDR_COPY(wh->i_addr1, da);
804 IEEE80211_ADDR_COPY(wh->i_addr2,
806 IEEE80211_ADDR_COPY(wh->i_addr3, da);
807 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa);
811 case IEEE80211_M_MONITOR: /* NB: to quiet compiler */
815 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
816 IEEE80211_ADDR_COPY(wh->i_addr1, da);
817 IEEE80211_ADDR_COPY(wh->i_addr2, sa);
818 #ifdef IEEE80211_SUPPORT_MESH
819 if (vap->iv_opmode == IEEE80211_M_MBSS)
820 IEEE80211_ADDR_COPY(wh->i_addr3, sa);
823 IEEE80211_ADDR_COPY(wh->i_addr3, bssid);
825 *(uint16_t *)&wh->i_dur[0] = 0;
828 * XXX TODO: this is what the TX lock is for.
829 * Here we're incrementing sequence numbers, and they
830 * need to be in lock-step with what the driver is doing
831 * both in TX ordering and crypto encap (IV increment.)
833 * If the driver does seqno itself, then we can skip
834 * assigning sequence numbers here, and we can avoid
835 * requiring the TX lock.
837 tap = &ni->ni_tx_ampdu[tid];
838 if (tid != IEEE80211_NONQOS_TID && IEEE80211_AMPDU_RUNNING(tap)) {
839 m->m_flags |= M_AMPDU_MPDU;
841 /* NB: zero out i_seq field (for s/w encryption etc) */
842 *(uint16_t *)&wh->i_seq[0] = 0;
844 if (IEEE80211_HAS_SEQ(type & IEEE80211_FC0_TYPE_MASK,
845 type & IEEE80211_FC0_SUBTYPE_MASK))
847 * 802.11-2012 9.3.2.10 - QoS multicast frames
848 * come out of a different seqno space.
850 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
851 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++;
853 seqno = ni->ni_txseqs[tid]++;
858 *(uint16_t *)&wh->i_seq[0] =
859 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
860 M_SEQNO_SET(m, seqno);
863 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
864 m->m_flags |= M_MCAST;
869 * Send a management frame to the specified node. The node pointer
870 * must have a reference as the pointer will be passed to the driver
871 * and potentially held for a long time. If the frame is successfully
872 * dispatched to the driver, then it is responsible for freeing the
873 * reference (and potentially free'ing up any associated storage);
874 * otherwise deal with reclaiming any reference (on error).
877 ieee80211_mgmt_output(struct ieee80211_node *ni, struct mbuf *m, int type,
878 struct ieee80211_bpf_params *params)
880 struct ieee80211vap *vap = ni->ni_vap;
881 struct ieee80211com *ic = ni->ni_ic;
882 struct ieee80211_frame *wh;
885 KASSERT(ni != NULL, ("null node"));
887 if (vap->iv_state == IEEE80211_S_CAC) {
888 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH,
889 ni, "block %s frame in CAC state",
890 ieee80211_mgt_subtype_name(type));
891 vap->iv_stats.is_tx_badstate++;
892 ieee80211_free_node(ni);
894 return EIO; /* XXX */
897 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT);
899 ieee80211_free_node(ni);
903 IEEE80211_TX_LOCK(ic);
905 wh = mtod(m, struct ieee80211_frame *);
906 ieee80211_send_setup(ni, m,
907 IEEE80211_FC0_TYPE_MGT | type, IEEE80211_NONQOS_TID,
908 vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid);
909 if (params->ibp_flags & IEEE80211_BPF_CRYPTO) {
910 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr1,
911 "encrypting frame (%s)", __func__);
912 wh->i_fc[1] |= IEEE80211_FC1_PROTECTED;
914 m->m_flags |= M_ENCAP; /* mark encapsulated */
916 KASSERT(type != IEEE80211_FC0_SUBTYPE_PROBE_RESP, ("probe response?"));
917 M_WME_SETAC(m, params->ibp_pri);
919 #ifdef IEEE80211_DEBUG
920 /* avoid printing too many frames */
921 if ((ieee80211_msg_debug(vap) && doprint(vap, type)) ||
922 ieee80211_msg_dumppkts(vap)) {
923 printf("[%s] send %s on channel %u\n",
924 ether_sprintf(wh->i_addr1),
925 ieee80211_mgt_subtype_name(type),
926 ieee80211_chan2ieee(ic, ic->ic_curchan));
929 IEEE80211_NODE_STAT(ni, tx_mgmt);
931 ret = ieee80211_raw_output(vap, ni, m, params);
932 IEEE80211_TX_UNLOCK(ic);
937 ieee80211_nulldata_transmitted(struct ieee80211_node *ni, void *arg,
940 struct ieee80211vap *vap = ni->ni_vap;
946 * Send a null data frame to the specified node. If the station
947 * is setup for QoS then a QoS Null Data frame is constructed.
948 * If this is a WDS station then a 4-address frame is constructed.
950 * NB: the caller is assumed to have setup a node reference
951 * for use; this is necessary to deal with a race condition
952 * when probing for inactive stations. Like ieee80211_mgmt_output
953 * we must cleanup any node reference on error; however we
954 * can safely just unref it as we know it will never be the
955 * last reference to the node.
958 ieee80211_send_nulldata(struct ieee80211_node *ni)
960 struct ieee80211vap *vap = ni->ni_vap;
961 struct ieee80211com *ic = ni->ni_ic;
963 struct ieee80211_frame *wh;
968 if (vap->iv_state == IEEE80211_S_CAC) {
969 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH,
970 ni, "block %s frame in CAC state", "null data");
971 ieee80211_unref_node(&ni);
972 vap->iv_stats.is_tx_badstate++;
973 return EIO; /* XXX */
976 if (ni->ni_flags & (IEEE80211_NODE_QOS|IEEE80211_NODE_HT))
977 hdrlen = sizeof(struct ieee80211_qosframe);
979 hdrlen = sizeof(struct ieee80211_frame);
980 /* NB: only WDS vap's get 4-address frames */
981 if (vap->iv_opmode == IEEE80211_M_WDS)
982 hdrlen += IEEE80211_ADDR_LEN;
983 if (ic->ic_flags & IEEE80211_F_DATAPAD)
984 hdrlen = roundup(hdrlen, sizeof(uint32_t));
986 m = ieee80211_getmgtframe(&frm, ic->ic_headroom + hdrlen, 0);
989 ieee80211_unref_node(&ni);
990 vap->iv_stats.is_tx_nobuf++;
993 KASSERT(M_LEADINGSPACE(m) >= hdrlen,
994 ("leading space %zd", M_LEADINGSPACE(m)));
995 M_PREPEND(m, hdrlen, M_NOWAIT);
997 /* NB: cannot happen */
998 ieee80211_free_node(ni);
1002 IEEE80211_TX_LOCK(ic);
1004 wh = mtod(m, struct ieee80211_frame *); /* NB: a little lie */
1005 if (ni->ni_flags & IEEE80211_NODE_QOS) {
1006 const int tid = WME_AC_TO_TID(WME_AC_BE);
1009 ieee80211_send_setup(ni, m,
1010 IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_QOS_NULL,
1011 tid, vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid);
1013 if (vap->iv_opmode == IEEE80211_M_WDS)
1014 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos;
1016 qos = ((struct ieee80211_qosframe *) wh)->i_qos;
1017 qos[0] = tid & IEEE80211_QOS_TID;
1018 if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[WME_AC_BE].wmep_noackPolicy)
1019 qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK;
1022 ieee80211_send_setup(ni, m,
1023 IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_NODATA,
1024 IEEE80211_NONQOS_TID,
1025 vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid);
1027 if (vap->iv_opmode != IEEE80211_M_WDS) {
1028 /* NB: power management bit is never sent by an AP */
1029 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) &&
1030 vap->iv_opmode != IEEE80211_M_HOSTAP)
1031 wh->i_fc[1] |= IEEE80211_FC1_PWR_MGT;
1033 if ((ic->ic_flags & IEEE80211_F_SCAN) &&
1034 (ni->ni_flags & IEEE80211_NODE_PWR_MGT)) {
1035 ieee80211_add_callback(m, ieee80211_nulldata_transmitted,
1038 m->m_len = m->m_pkthdr.len = hdrlen;
1039 m->m_flags |= M_ENCAP; /* mark encapsulated */
1041 M_WME_SETAC(m, WME_AC_BE);
1043 IEEE80211_NODE_STAT(ni, tx_data);
1045 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, ni,
1046 "send %snull data frame on channel %u, pwr mgt %s",
1047 ni->ni_flags & IEEE80211_NODE_QOS ? "QoS " : "",
1048 ieee80211_chan2ieee(ic, ic->ic_curchan),
1049 wh->i_fc[1] & IEEE80211_FC1_PWR_MGT ? "ena" : "dis");
1051 ret = ieee80211_raw_output(vap, ni, m, NULL);
1052 IEEE80211_TX_UNLOCK(ic);
1057 * Assign priority to a frame based on any vlan tag assigned
1058 * to the station and/or any Diffserv setting in an IP header.
1059 * Finally, if an ACM policy is setup (in station mode) it's
1063 ieee80211_classify(struct ieee80211_node *ni, struct mbuf *m)
1065 const struct ether_header *eh = NULL;
1066 uint16_t ether_type;
1067 int v_wme_ac, d_wme_ac, ac;
1069 if (__predict_false(m->m_flags & M_ENCAP)) {
1070 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
1072 int hdrlen, subtype;
1074 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1075 if (subtype & IEEE80211_FC0_SUBTYPE_NODATA) {
1080 hdrlen = ieee80211_hdrsize(wh);
1081 if (m->m_pkthdr.len < hdrlen + sizeof(*llc))
1084 llc = (struct llc *)mtodo(m, hdrlen);
1085 if (llc->llc_dsap != LLC_SNAP_LSAP ||
1086 llc->llc_ssap != LLC_SNAP_LSAP ||
1087 llc->llc_control != LLC_UI ||
1088 llc->llc_snap.org_code[0] != 0 ||
1089 llc->llc_snap.org_code[1] != 0 ||
1090 llc->llc_snap.org_code[2] != 0)
1093 ether_type = llc->llc_snap.ether_type;
1095 eh = mtod(m, struct ether_header *);
1096 ether_type = eh->ether_type;
1100 * Always promote PAE/EAPOL frames to high priority.
1102 if (ether_type == htons(ETHERTYPE_PAE)) {
1103 /* NB: mark so others don't need to check header */
1104 m->m_flags |= M_EAPOL;
1109 * Non-qos traffic goes to BE.
1111 if ((ni->ni_flags & IEEE80211_NODE_QOS) == 0) {
1117 * If node has a vlan tag then all traffic
1118 * to it must have a matching tag.
1121 if (ni->ni_vlan != 0) {
1122 if ((m->m_flags & M_VLANTAG) == 0) {
1123 IEEE80211_NODE_STAT(ni, tx_novlantag);
1126 if (EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) !=
1127 EVL_VLANOFTAG(ni->ni_vlan)) {
1128 IEEE80211_NODE_STAT(ni, tx_vlanmismatch);
1131 /* map vlan priority to AC */
1132 v_wme_ac = TID_TO_WME_AC(EVL_PRIOFTAG(ni->ni_vlan));
1135 /* XXX m_copydata may be too slow for fast path */
1137 if (eh && eh->ether_type == htons(ETHERTYPE_IP)) {
1140 * IP frame, map the DSCP bits from the TOS field.
1142 /* NB: ip header may not be in first mbuf */
1143 m_copydata(m, sizeof(struct ether_header) +
1144 offsetof(struct ip, ip_tos), sizeof(tos), &tos);
1145 tos >>= 5; /* NB: ECN + low 3 bits of DSCP */
1146 d_wme_ac = TID_TO_WME_AC(tos);
1150 if (eh && eh->ether_type == htons(ETHERTYPE_IPV6)) {
1154 * IPv6 frame, map the DSCP bits from the traffic class field.
1156 m_copydata(m, sizeof(struct ether_header) +
1157 offsetof(struct ip6_hdr, ip6_flow), sizeof(flow),
1159 tos = (uint8_t)(ntohl(flow) >> 20);
1160 tos >>= 5; /* NB: ECN + low 3 bits of DSCP */
1161 d_wme_ac = TID_TO_WME_AC(tos);
1164 d_wme_ac = WME_AC_BE;
1172 * Use highest priority AC.
1174 if (v_wme_ac > d_wme_ac)
1182 if (ni->ni_vap->iv_opmode == IEEE80211_M_STA) {
1183 static const int acmap[4] = {
1184 WME_AC_BK, /* WME_AC_BE */
1185 WME_AC_BK, /* WME_AC_BK */
1186 WME_AC_BE, /* WME_AC_VI */
1187 WME_AC_VI, /* WME_AC_VO */
1189 struct ieee80211com *ic = ni->ni_ic;
1191 while (ac != WME_AC_BK &&
1192 ic->ic_wme.wme_wmeBssChanParams.cap_wmeParams[ac].wmep_acm)
1201 * Insure there is sufficient contiguous space to encapsulate the
1202 * 802.11 data frame. If room isn't already there, arrange for it.
1203 * Drivers and cipher modules assume we have done the necessary work
1204 * and fail rudely if they don't find the space they need.
1207 ieee80211_mbuf_adjust(struct ieee80211vap *vap, int hdrsize,
1208 struct ieee80211_key *key, struct mbuf *m)
1210 #define TO_BE_RECLAIMED (sizeof(struct ether_header) - sizeof(struct llc))
1211 int needed_space = vap->iv_ic->ic_headroom + hdrsize;
1214 /* XXX belongs in crypto code? */
1215 needed_space += key->wk_cipher->ic_header;
1218 * When crypto is being done in the host we must insure
1219 * the data are writable for the cipher routines; clone
1220 * a writable mbuf chain.
1221 * XXX handle SWMIC specially
1223 if (key->wk_flags & (IEEE80211_KEY_SWENCRYPT|IEEE80211_KEY_SWENMIC)) {
1224 m = m_unshare(m, M_NOWAIT);
1226 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
1227 "%s: cannot get writable mbuf\n", __func__);
1228 vap->iv_stats.is_tx_nobuf++; /* XXX new stat */
1234 * We know we are called just before stripping an Ethernet
1235 * header and prepending an LLC header. This means we know
1237 * sizeof(struct ether_header) - sizeof(struct llc)
1238 * bytes recovered to which we need additional space for the
1239 * 802.11 header and any crypto header.
1241 /* XXX check trailing space and copy instead? */
1242 if (M_LEADINGSPACE(m) < needed_space - TO_BE_RECLAIMED) {
1243 struct mbuf *n = m_gethdr(M_NOWAIT, m->m_type);
1245 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
1246 "%s: cannot expand storage\n", __func__);
1247 vap->iv_stats.is_tx_nobuf++;
1251 KASSERT(needed_space <= MHLEN,
1252 ("not enough room, need %u got %d\n", needed_space, MHLEN));
1254 * Setup new mbuf to have leading space to prepend the
1255 * 802.11 header and any crypto header bits that are
1256 * required (the latter are added when the driver calls
1257 * back to ieee80211_crypto_encap to do crypto encapsulation).
1259 /* NB: must be first 'cuz it clobbers m_data */
1260 m_move_pkthdr(n, m);
1261 n->m_len = 0; /* NB: m_gethdr does not set */
1262 n->m_data += needed_space;
1264 * Pull up Ethernet header to create the expected layout.
1265 * We could use m_pullup but that's overkill (i.e. we don't
1266 * need the actual data) and it cannot fail so do it inline
1269 /* NB: struct ether_header is known to be contiguous */
1270 n->m_len += sizeof(struct ether_header);
1271 m->m_len -= sizeof(struct ether_header);
1272 m->m_data += sizeof(struct ether_header);
1274 * Replace the head of the chain.
1280 #undef TO_BE_RECLAIMED
1284 * Return the transmit key to use in sending a unicast frame.
1285 * If a unicast key is set we use that. When no unicast key is set
1286 * we fall back to the default transmit key.
1288 static __inline struct ieee80211_key *
1289 ieee80211_crypto_getucastkey(struct ieee80211vap *vap,
1290 struct ieee80211_node *ni)
1292 if (IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)) {
1293 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE ||
1294 IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey]))
1296 return &vap->iv_nw_keys[vap->iv_def_txkey];
1298 return &ni->ni_ucastkey;
1303 * Return the transmit key to use in sending a multicast frame.
1304 * Multicast traffic always uses the group key which is installed as
1305 * the default tx key.
1307 static __inline struct ieee80211_key *
1308 ieee80211_crypto_getmcastkey(struct ieee80211vap *vap,
1309 struct ieee80211_node *ni)
1311 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE ||
1312 IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey]))
1314 return &vap->iv_nw_keys[vap->iv_def_txkey];
1318 * Encapsulate an outbound data frame. The mbuf chain is updated.
1319 * If an error is encountered NULL is returned. The caller is required
1320 * to provide a node reference and pullup the ethernet header in the
1323 * NB: Packet is assumed to be processed by ieee80211_classify which
1324 * marked EAPOL frames w/ M_EAPOL.
1327 ieee80211_encap(struct ieee80211vap *vap, struct ieee80211_node *ni,
1330 #define WH4(wh) ((struct ieee80211_frame_addr4 *)(wh))
1331 #define MC01(mc) ((struct ieee80211_meshcntl_ae01 *)mc)
1332 struct ieee80211com *ic = ni->ni_ic;
1333 #ifdef IEEE80211_SUPPORT_MESH
1334 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1335 struct ieee80211_meshcntl_ae10 *mc;
1336 struct ieee80211_mesh_route *rt = NULL;
1339 struct ether_header eh;
1340 struct ieee80211_frame *wh;
1341 struct ieee80211_key *key;
1343 int hdrsize, hdrspace, datalen, addqos, txfrag, is4addr, is_mcast;
1344 ieee80211_seq seqno;
1345 int meshhdrsize, meshae;
1349 IEEE80211_TX_LOCK_ASSERT(ic);
1351 is_mcast = !! (m->m_flags & (M_MCAST | M_BCAST));
1354 * Copy existing Ethernet header to a safe place. The
1355 * rest of the code assumes it's ok to strip it when
1356 * reorganizing state for the final encapsulation.
1358 KASSERT(m->m_len >= sizeof(eh), ("no ethernet header!"));
1359 ETHER_HEADER_COPY(&eh, mtod(m, caddr_t));
1362 * Insure space for additional headers. First identify
1363 * transmit key to use in calculating any buffer adjustments
1364 * required. This is also used below to do privacy
1365 * encapsulation work. Then calculate the 802.11 header
1366 * size and any padding required by the driver.
1368 * Note key may be NULL if we fall back to the default
1369 * transmit key and that is not set. In that case the
1370 * buffer may not be expanded as needed by the cipher
1371 * routines, but they will/should discard it.
1373 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
1374 if (vap->iv_opmode == IEEE80211_M_STA ||
1375 !IEEE80211_IS_MULTICAST(eh.ether_dhost) ||
1376 (vap->iv_opmode == IEEE80211_M_WDS &&
1377 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY)))
1378 key = ieee80211_crypto_getucastkey(vap, ni);
1380 key = ieee80211_crypto_getmcastkey(vap, ni);
1381 if (key == NULL && (m->m_flags & M_EAPOL) == 0) {
1382 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO,
1384 "no default transmit key (%s) deftxkey %u",
1385 __func__, vap->iv_def_txkey);
1386 vap->iv_stats.is_tx_nodefkey++;
1392 * XXX Some ap's don't handle QoS-encapsulated EAPOL
1393 * frames so suppress use. This may be an issue if other
1394 * ap's require all data frames to be QoS-encapsulated
1395 * once negotiated in which case we'll need to make this
1398 * Don't send multicast QoS frames.
1399 * Technically multicast frames can be QoS if all stations in the
1402 * NB: mesh data frames are QoS, including multicast frames.
1405 (((is_mcast == 0) && (ni->ni_flags &
1406 (IEEE80211_NODE_QOS|IEEE80211_NODE_HT))) ||
1407 (vap->iv_opmode == IEEE80211_M_MBSS)) &&
1408 (m->m_flags & M_EAPOL) == 0;
1411 hdrsize = sizeof(struct ieee80211_qosframe);
1413 hdrsize = sizeof(struct ieee80211_frame);
1414 #ifdef IEEE80211_SUPPORT_MESH
1415 if (vap->iv_opmode == IEEE80211_M_MBSS) {
1417 * Mesh data frames are encapsulated according to the
1418 * rules of Section 11B.8.5 (p.139 of D3.0 spec).
1419 * o Group Addressed data (aka multicast) originating
1420 * at the local sta are sent w/ 3-address format and
1421 * address extension mode 00
1422 * o Individually Addressed data (aka unicast) originating
1423 * at the local sta are sent w/ 4-address format and
1424 * address extension mode 00
1425 * o Group Addressed data forwarded from a non-mesh sta are
1426 * sent w/ 3-address format and address extension mode 01
1427 * o Individually Address data from another sta are sent
1428 * w/ 4-address format and address extension mode 10
1430 is4addr = 0; /* NB: don't use, disable */
1431 if (!IEEE80211_IS_MULTICAST(eh.ether_dhost)) {
1432 rt = ieee80211_mesh_rt_find(vap, eh.ether_dhost);
1433 KASSERT(rt != NULL, ("route is NULL"));
1434 dir = IEEE80211_FC1_DIR_DSTODS;
1435 hdrsize += IEEE80211_ADDR_LEN;
1436 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
1437 if (IEEE80211_ADDR_EQ(rt->rt_mesh_gate,
1439 IEEE80211_NOTE_MAC(vap,
1442 "%s", "trying to send to ourself");
1445 meshae = IEEE80211_MESH_AE_10;
1447 sizeof(struct ieee80211_meshcntl_ae10);
1449 meshae = IEEE80211_MESH_AE_00;
1451 sizeof(struct ieee80211_meshcntl);
1454 dir = IEEE80211_FC1_DIR_FROMDS;
1455 if (!IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr)) {
1457 meshae = IEEE80211_MESH_AE_01;
1459 sizeof(struct ieee80211_meshcntl_ae01);
1462 meshae = IEEE80211_MESH_AE_00;
1463 meshhdrsize = sizeof(struct ieee80211_meshcntl);
1469 * 4-address frames need to be generated for:
1470 * o packets sent through a WDS vap (IEEE80211_M_WDS)
1471 * o packets sent through a vap marked for relaying
1472 * (e.g. a station operating with dynamic WDS)
1474 is4addr = vap->iv_opmode == IEEE80211_M_WDS ||
1475 ((vap->iv_flags_ext & IEEE80211_FEXT_4ADDR) &&
1476 !IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr));
1478 hdrsize += IEEE80211_ADDR_LEN;
1479 meshhdrsize = meshae = 0;
1480 #ifdef IEEE80211_SUPPORT_MESH
1484 * Honor driver DATAPAD requirement.
1486 if (ic->ic_flags & IEEE80211_F_DATAPAD)
1487 hdrspace = roundup(hdrsize, sizeof(uint32_t));
1491 if (__predict_true((m->m_flags & M_FF) == 0)) {
1495 m = ieee80211_mbuf_adjust(vap, hdrspace + meshhdrsize, key, m);
1497 /* NB: ieee80211_mbuf_adjust handles msgs+statistics */
1500 /* NB: this could be optimized 'cuz of ieee80211_mbuf_adjust */
1501 m_adj(m, sizeof(struct ether_header) - sizeof(struct llc));
1502 llc = mtod(m, struct llc *);
1503 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP;
1504 llc->llc_control = LLC_UI;
1505 llc->llc_snap.org_code[0] = 0;
1506 llc->llc_snap.org_code[1] = 0;
1507 llc->llc_snap.org_code[2] = 0;
1508 llc->llc_snap.ether_type = eh.ether_type;
1510 #ifdef IEEE80211_SUPPORT_SUPERG
1512 * Aggregated frame. Check if it's for AMSDU or FF.
1514 * XXX TODO: IEEE80211_NODE_AMSDU* isn't implemented
1515 * anywhere for some reason. But, since 11n requires
1516 * AMSDU RX, we can just assume "11n" == "AMSDU".
1518 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, "%s: called; M_FF\n", __func__);
1519 if (ieee80211_amsdu_tx_ok(ni)) {
1520 m = ieee80211_amsdu_encap(vap, m, hdrspace + meshhdrsize, key);
1523 m = ieee80211_ff_encap(vap, m, hdrspace + meshhdrsize, key);
1529 datalen = m->m_pkthdr.len; /* NB: w/o 802.11 header */
1531 M_PREPEND(m, hdrspace + meshhdrsize, M_NOWAIT);
1533 vap->iv_stats.is_tx_nobuf++;
1536 wh = mtod(m, struct ieee80211_frame *);
1537 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_DATA;
1538 *(uint16_t *)wh->i_dur = 0;
1539 qos = NULL; /* NB: quiet compiler */
1541 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS;
1542 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr);
1543 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
1544 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost);
1545 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, eh.ether_shost);
1546 } else switch (vap->iv_opmode) {
1547 case IEEE80211_M_STA:
1548 wh->i_fc[1] = IEEE80211_FC1_DIR_TODS;
1549 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_bssid);
1550 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost);
1551 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost);
1553 case IEEE80211_M_IBSS:
1554 case IEEE80211_M_AHDEMO:
1555 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
1556 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost);
1557 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost);
1559 * NB: always use the bssid from iv_bss as the
1560 * neighbor's may be stale after an ibss merge
1562 IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_bss->ni_bssid);
1564 case IEEE80211_M_HOSTAP:
1565 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
1566 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost);
1567 IEEE80211_ADDR_COPY(wh->i_addr2, ni->ni_bssid);
1568 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_shost);
1570 #ifdef IEEE80211_SUPPORT_MESH
1571 case IEEE80211_M_MBSS:
1572 /* NB: offset by hdrspace to deal with DATAPAD */
1573 mc = (struct ieee80211_meshcntl_ae10 *)
1574 (mtod(m, uint8_t *) + hdrspace);
1577 case IEEE80211_MESH_AE_00: /* no proxy */
1579 if (dir == IEEE80211_FC1_DIR_DSTODS) { /* ucast */
1580 IEEE80211_ADDR_COPY(wh->i_addr1,
1582 IEEE80211_ADDR_COPY(wh->i_addr2,
1584 IEEE80211_ADDR_COPY(wh->i_addr3,
1586 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4,
1588 qos =((struct ieee80211_qosframe_addr4 *)
1590 } else if (dir == IEEE80211_FC1_DIR_FROMDS) {
1592 IEEE80211_ADDR_COPY(wh->i_addr1,
1594 IEEE80211_ADDR_COPY(wh->i_addr2,
1596 IEEE80211_ADDR_COPY(wh->i_addr3,
1598 qos = ((struct ieee80211_qosframe *)
1602 case IEEE80211_MESH_AE_01: /* mcast, proxy */
1603 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
1604 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost);
1605 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
1606 IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_myaddr);
1608 IEEE80211_ADDR_COPY(MC01(mc)->mc_addr4,
1610 qos = ((struct ieee80211_qosframe *) wh)->i_qos;
1612 case IEEE80211_MESH_AE_10: /* ucast, proxy */
1613 KASSERT(rt != NULL, ("route is NULL"));
1614 IEEE80211_ADDR_COPY(wh->i_addr1, rt->rt_nexthop);
1615 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
1616 IEEE80211_ADDR_COPY(wh->i_addr3, rt->rt_mesh_gate);
1617 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, vap->iv_myaddr);
1618 mc->mc_flags = IEEE80211_MESH_AE_10;
1619 IEEE80211_ADDR_COPY(mc->mc_addr5, eh.ether_dhost);
1620 IEEE80211_ADDR_COPY(mc->mc_addr6, eh.ether_shost);
1621 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos;
1624 KASSERT(0, ("meshae %d", meshae));
1627 mc->mc_ttl = ms->ms_ttl;
1629 le32enc(mc->mc_seq, ms->ms_seq);
1632 case IEEE80211_M_WDS: /* NB: is4addr should always be true */
1636 if (m->m_flags & M_MORE_DATA)
1637 wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA;
1642 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos;
1643 /* NB: mesh case handled earlier */
1644 } else if (vap->iv_opmode != IEEE80211_M_MBSS)
1645 qos = ((struct ieee80211_qosframe *) wh)->i_qos;
1646 ac = M_WME_GETAC(m);
1647 /* map from access class/queue to 11e header priorty value */
1648 tid = WME_AC_TO_TID(ac);
1649 qos[0] = tid & IEEE80211_QOS_TID;
1650 if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[ac].wmep_noackPolicy)
1651 qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK;
1652 #ifdef IEEE80211_SUPPORT_MESH
1653 if (vap->iv_opmode == IEEE80211_M_MBSS)
1654 qos[1] = IEEE80211_QOS_MC;
1658 wh->i_fc[0] |= IEEE80211_FC0_SUBTYPE_QOS;
1661 * If this is an A-MSDU then ensure we set the
1665 qos[0] |= IEEE80211_QOS_AMSDU;
1668 * XXX TODO TX lock is needed for atomic updates of sequence
1669 * numbers. If the driver does it, then don't do it here;
1670 * and we don't need the TX lock held.
1672 if ((m->m_flags & M_AMPDU_MPDU) == 0) {
1674 * 802.11-2012 9.3.2.10 -
1676 * If this is a multicast frame then we need
1677 * to ensure that the sequence number comes from
1678 * a separate seqno space and not the TID space.
1680 * Otherwise multicast frames may actually cause
1681 * holes in the TX blockack window space and
1682 * upset various things.
1684 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1685 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++;
1687 seqno = ni->ni_txseqs[tid]++;
1690 * NB: don't assign a sequence # to potential
1691 * aggregates; we expect this happens at the
1692 * point the frame comes off any aggregation q
1693 * as otherwise we may introduce holes in the
1694 * BA sequence space and/or make window accouting
1697 * XXX may want to control this with a driver
1698 * capability; this may also change when we pull
1699 * aggregation up into net80211
1701 seqno = ni->ni_txseqs[tid]++;
1702 *(uint16_t *)wh->i_seq =
1703 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
1704 M_SEQNO_SET(m, seqno);
1706 /* NB: zero out i_seq field (for s/w encryption etc) */
1707 *(uint16_t *)wh->i_seq = 0;
1711 * XXX TODO TX lock is needed for atomic updates of sequence
1712 * numbers. If the driver does it, then don't do it here;
1713 * and we don't need the TX lock held.
1715 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++;
1716 *(uint16_t *)wh->i_seq =
1717 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
1718 M_SEQNO_SET(m, seqno);
1721 * XXX TODO: we shouldn't allow EAPOL, etc that would
1722 * be forced to be non-QoS traffic to be A-MSDU encapsulated.
1725 printf("%s: XXX ERROR: is_amsdu set; not QoS!\n",
1730 * Check if xmit fragmentation is required.
1732 * If the hardware does fragmentation offload, then don't bother
1735 if (IEEE80211_CONF_FRAG_OFFLOAD(ic))
1738 txfrag = (m->m_pkthdr.len > vap->iv_fragthreshold &&
1739 !IEEE80211_IS_MULTICAST(wh->i_addr1) &&
1740 (vap->iv_caps & IEEE80211_C_TXFRAG) &&
1741 (m->m_flags & (M_FF | M_AMPDU_MPDU)) == 0);
1745 * IEEE 802.1X: send EAPOL frames always in the clear.
1746 * WPA/WPA2: encrypt EAPOL keys when pairwise keys are set.
1748 if ((m->m_flags & M_EAPOL) == 0 ||
1749 ((vap->iv_flags & IEEE80211_F_WPA) &&
1750 (vap->iv_opmode == IEEE80211_M_STA ?
1751 !IEEE80211_KEY_UNDEFINED(key) :
1752 !IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)))) {
1753 wh->i_fc[1] |= IEEE80211_FC1_PROTECTED;
1754 if (!ieee80211_crypto_enmic(vap, key, m, txfrag)) {
1755 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT,
1757 "%s", "enmic failed, discard frame");
1758 vap->iv_stats.is_crypto_enmicfail++;
1763 if (txfrag && !ieee80211_fragment(vap, m, hdrsize,
1764 key != NULL ? key->wk_cipher->ic_header : 0, vap->iv_fragthreshold))
1767 m->m_flags |= M_ENCAP; /* mark encapsulated */
1769 IEEE80211_NODE_STAT(ni, tx_data);
1770 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1771 IEEE80211_NODE_STAT(ni, tx_mcast);
1772 m->m_flags |= M_MCAST;
1774 IEEE80211_NODE_STAT(ni, tx_ucast);
1775 IEEE80211_NODE_STAT_ADD(ni, tx_bytes, datalen);
1787 ieee80211_free_mbuf(struct mbuf *m)
1795 next = m->m_nextpkt;
1796 m->m_nextpkt = NULL;
1798 } while ((m = next) != NULL);
1802 * Fragment the frame according to the specified mtu.
1803 * The size of the 802.11 header (w/o padding) is provided
1804 * so we don't need to recalculate it. We create a new
1805 * mbuf for each fragment and chain it through m_nextpkt;
1806 * we might be able to optimize this by reusing the original
1807 * packet's mbufs but that is significantly more complicated.
1810 ieee80211_fragment(struct ieee80211vap *vap, struct mbuf *m0,
1811 u_int hdrsize, u_int ciphdrsize, u_int mtu)
1813 struct ieee80211com *ic = vap->iv_ic;
1814 struct ieee80211_frame *wh, *whf;
1815 struct mbuf *m, *prev;
1816 u_int totalhdrsize, fragno, fragsize, off, remainder, payload;
1819 KASSERT(m0->m_nextpkt == NULL, ("mbuf already chained?"));
1820 KASSERT(m0->m_pkthdr.len > mtu,
1821 ("pktlen %u mtu %u", m0->m_pkthdr.len, mtu));
1824 * Honor driver DATAPAD requirement.
1826 if (ic->ic_flags & IEEE80211_F_DATAPAD)
1827 hdrspace = roundup(hdrsize, sizeof(uint32_t));
1831 wh = mtod(m0, struct ieee80211_frame *);
1832 /* NB: mark the first frag; it will be propagated below */
1833 wh->i_fc[1] |= IEEE80211_FC1_MORE_FRAG;
1834 totalhdrsize = hdrspace + ciphdrsize;
1836 off = mtu - ciphdrsize;
1837 remainder = m0->m_pkthdr.len - off;
1840 fragsize = MIN(totalhdrsize + remainder, mtu);
1841 m = m_get2(fragsize, M_NOWAIT, MT_DATA, M_PKTHDR);
1844 /* leave room to prepend any cipher header */
1845 m_align(m, fragsize - ciphdrsize);
1848 * Form the header in the fragment. Note that since
1849 * we mark the first fragment with the MORE_FRAG bit
1850 * it automatically is propagated to each fragment; we
1851 * need only clear it on the last fragment (done below).
1852 * NB: frag 1+ dont have Mesh Control field present.
1854 whf = mtod(m, struct ieee80211_frame *);
1855 memcpy(whf, wh, hdrsize);
1856 #ifdef IEEE80211_SUPPORT_MESH
1857 if (vap->iv_opmode == IEEE80211_M_MBSS) {
1858 if (IEEE80211_IS_DSTODS(wh))
1859 ((struct ieee80211_qosframe_addr4 *)
1860 whf)->i_qos[1] &= ~IEEE80211_QOS_MC;
1862 ((struct ieee80211_qosframe *)
1863 whf)->i_qos[1] &= ~IEEE80211_QOS_MC;
1866 *(uint16_t *)&whf->i_seq[0] |= htole16(
1867 (fragno & IEEE80211_SEQ_FRAG_MASK) <<
1868 IEEE80211_SEQ_FRAG_SHIFT);
1871 payload = fragsize - totalhdrsize;
1872 /* NB: destination is known to be contiguous */
1874 m_copydata(m0, off, payload, mtod(m, uint8_t *) + hdrspace);
1875 m->m_len = hdrspace + payload;
1876 m->m_pkthdr.len = hdrspace + payload;
1877 m->m_flags |= M_FRAG;
1879 /* chain up the fragment */
1880 prev->m_nextpkt = m;
1883 /* deduct fragment just formed */
1884 remainder -= payload;
1886 } while (remainder != 0);
1888 /* set the last fragment */
1889 m->m_flags |= M_LASTFRAG;
1890 whf->i_fc[1] &= ~IEEE80211_FC1_MORE_FRAG;
1892 /* strip first mbuf now that everything has been copied */
1893 m_adj(m0, -(m0->m_pkthdr.len - (mtu - ciphdrsize)));
1894 m0->m_flags |= M_FIRSTFRAG | M_FRAG;
1896 vap->iv_stats.is_tx_fragframes++;
1897 vap->iv_stats.is_tx_frags += fragno-1;
1901 /* reclaim fragments but leave original frame for caller to free */
1902 ieee80211_free_mbuf(m0->m_nextpkt);
1903 m0->m_nextpkt = NULL;
1908 * Add a supported rates element id to a frame.
1911 ieee80211_add_rates(uint8_t *frm, const struct ieee80211_rateset *rs)
1915 *frm++ = IEEE80211_ELEMID_RATES;
1916 nrates = rs->rs_nrates;
1917 if (nrates > IEEE80211_RATE_SIZE)
1918 nrates = IEEE80211_RATE_SIZE;
1920 memcpy(frm, rs->rs_rates, nrates);
1921 return frm + nrates;
1925 * Add an extended supported rates element id to a frame.
1928 ieee80211_add_xrates(uint8_t *frm, const struct ieee80211_rateset *rs)
1931 * Add an extended supported rates element if operating in 11g mode.
1933 if (rs->rs_nrates > IEEE80211_RATE_SIZE) {
1934 int nrates = rs->rs_nrates - IEEE80211_RATE_SIZE;
1935 *frm++ = IEEE80211_ELEMID_XRATES;
1937 memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates);
1944 * Add an ssid element to a frame.
1947 ieee80211_add_ssid(uint8_t *frm, const uint8_t *ssid, u_int len)
1949 *frm++ = IEEE80211_ELEMID_SSID;
1951 memcpy(frm, ssid, len);
1956 * Add an erp element to a frame.
1959 ieee80211_add_erp(uint8_t *frm, struct ieee80211com *ic)
1963 *frm++ = IEEE80211_ELEMID_ERP;
1966 if (ic->ic_nonerpsta != 0)
1967 erp |= IEEE80211_ERP_NON_ERP_PRESENT;
1968 if (ic->ic_flags & IEEE80211_F_USEPROT)
1969 erp |= IEEE80211_ERP_USE_PROTECTION;
1970 if (ic->ic_flags & IEEE80211_F_USEBARKER)
1971 erp |= IEEE80211_ERP_LONG_PREAMBLE;
1977 * Add a CFParams element to a frame.
1980 ieee80211_add_cfparms(uint8_t *frm, struct ieee80211com *ic)
1982 #define ADDSHORT(frm, v) do { \
1986 *frm++ = IEEE80211_ELEMID_CFPARMS;
1988 *frm++ = 0; /* CFP count */
1989 *frm++ = 2; /* CFP period */
1990 ADDSHORT(frm, 0); /* CFP MaxDuration (TU) */
1991 ADDSHORT(frm, 0); /* CFP CurRemaining (TU) */
1996 static __inline uint8_t *
1997 add_appie(uint8_t *frm, const struct ieee80211_appie *ie)
1999 memcpy(frm, ie->ie_data, ie->ie_len);
2000 return frm + ie->ie_len;
2003 static __inline uint8_t *
2004 add_ie(uint8_t *frm, const uint8_t *ie)
2006 memcpy(frm, ie, 2 + ie[1]);
2007 return frm + 2 + ie[1];
2010 #define WME_OUI_BYTES 0x00, 0x50, 0xf2
2012 * Add a WME information element to a frame.
2015 ieee80211_add_wme_info(uint8_t *frm, struct ieee80211_wme_state *wme)
2017 static const struct ieee80211_wme_info info = {
2018 .wme_id = IEEE80211_ELEMID_VENDOR,
2019 .wme_len = sizeof(struct ieee80211_wme_info) - 2,
2020 .wme_oui = { WME_OUI_BYTES },
2021 .wme_type = WME_OUI_TYPE,
2022 .wme_subtype = WME_INFO_OUI_SUBTYPE,
2023 .wme_version = WME_VERSION,
2026 memcpy(frm, &info, sizeof(info));
2027 return frm + sizeof(info);
2031 * Add a WME parameters element to a frame.
2034 ieee80211_add_wme_param(uint8_t *frm, struct ieee80211_wme_state *wme)
2036 #define SM(_v, _f) (((_v) << _f##_S) & _f)
2037 #define ADDSHORT(frm, v) do { \
2041 /* NB: this works 'cuz a param has an info at the front */
2042 static const struct ieee80211_wme_info param = {
2043 .wme_id = IEEE80211_ELEMID_VENDOR,
2044 .wme_len = sizeof(struct ieee80211_wme_param) - 2,
2045 .wme_oui = { WME_OUI_BYTES },
2046 .wme_type = WME_OUI_TYPE,
2047 .wme_subtype = WME_PARAM_OUI_SUBTYPE,
2048 .wme_version = WME_VERSION,
2052 memcpy(frm, ¶m, sizeof(param));
2053 frm += __offsetof(struct ieee80211_wme_info, wme_info);
2054 *frm++ = wme->wme_bssChanParams.cap_info; /* AC info */
2055 *frm++ = 0; /* reserved field */
2056 for (i = 0; i < WME_NUM_AC; i++) {
2057 const struct wmeParams *ac =
2058 &wme->wme_bssChanParams.cap_wmeParams[i];
2059 *frm++ = SM(i, WME_PARAM_ACI)
2060 | SM(ac->wmep_acm, WME_PARAM_ACM)
2061 | SM(ac->wmep_aifsn, WME_PARAM_AIFSN)
2063 *frm++ = SM(ac->wmep_logcwmax, WME_PARAM_LOGCWMAX)
2064 | SM(ac->wmep_logcwmin, WME_PARAM_LOGCWMIN)
2066 ADDSHORT(frm, ac->wmep_txopLimit);
2072 #undef WME_OUI_BYTES
2075 * Add an 11h Power Constraint element to a frame.
2078 ieee80211_add_powerconstraint(uint8_t *frm, struct ieee80211vap *vap)
2080 const struct ieee80211_channel *c = vap->iv_bss->ni_chan;
2081 /* XXX per-vap tx power limit? */
2082 int8_t limit = vap->iv_ic->ic_txpowlimit / 2;
2084 frm[0] = IEEE80211_ELEMID_PWRCNSTR;
2086 frm[2] = c->ic_maxregpower > limit ? c->ic_maxregpower - limit : 0;
2091 * Add an 11h Power Capability element to a frame.
2094 ieee80211_add_powercapability(uint8_t *frm, const struct ieee80211_channel *c)
2096 frm[0] = IEEE80211_ELEMID_PWRCAP;
2098 frm[2] = c->ic_minpower;
2099 frm[3] = c->ic_maxpower;
2104 * Add an 11h Supported Channels element to a frame.
2107 ieee80211_add_supportedchannels(uint8_t *frm, struct ieee80211com *ic)
2109 static const int ielen = 26;
2111 frm[0] = IEEE80211_ELEMID_SUPPCHAN;
2113 /* XXX not correct */
2114 memcpy(frm+2, ic->ic_chan_avail, ielen);
2115 return frm + 2 + ielen;
2119 * Add an 11h Quiet time element to a frame.
2122 ieee80211_add_quiet(uint8_t *frm, struct ieee80211vap *vap, int update)
2124 struct ieee80211_quiet_ie *quiet = (struct ieee80211_quiet_ie *) frm;
2126 quiet->quiet_ie = IEEE80211_ELEMID_QUIET;
2130 * Only update every beacon interval - otherwise probe responses
2131 * would update the quiet count value.
2134 if (vap->iv_quiet_count_value == 1)
2135 vap->iv_quiet_count_value = vap->iv_quiet_count;
2136 else if (vap->iv_quiet_count_value > 1)
2137 vap->iv_quiet_count_value--;
2140 if (vap->iv_quiet_count_value == 0) {
2141 /* value 0 is reserved as per 802.11h standerd */
2142 vap->iv_quiet_count_value = 1;
2145 quiet->tbttcount = vap->iv_quiet_count_value;
2146 quiet->period = vap->iv_quiet_period;
2147 quiet->duration = htole16(vap->iv_quiet_duration);
2148 quiet->offset = htole16(vap->iv_quiet_offset);
2149 return frm + sizeof(*quiet);
2153 * Add an 11h Channel Switch Announcement element to a frame.
2154 * Note that we use the per-vap CSA count to adjust the global
2155 * counter so we can use this routine to form probe response
2156 * frames and get the current count.
2159 ieee80211_add_csa(uint8_t *frm, struct ieee80211vap *vap)
2161 struct ieee80211com *ic = vap->iv_ic;
2162 struct ieee80211_csa_ie *csa = (struct ieee80211_csa_ie *) frm;
2164 csa->csa_ie = IEEE80211_ELEMID_CSA;
2166 csa->csa_mode = 1; /* XXX force quiet on channel */
2167 csa->csa_newchan = ieee80211_chan2ieee(ic, ic->ic_csa_newchan);
2168 csa->csa_count = ic->ic_csa_count - vap->iv_csa_count;
2169 return frm + sizeof(*csa);
2173 * Add an 11h country information element to a frame.
2176 ieee80211_add_countryie(uint8_t *frm, struct ieee80211com *ic)
2179 if (ic->ic_countryie == NULL ||
2180 ic->ic_countryie_chan != ic->ic_bsschan) {
2182 * Handle lazy construction of ie. This is done on
2183 * first use and after a channel change that requires
2186 if (ic->ic_countryie != NULL)
2187 IEEE80211_FREE(ic->ic_countryie, M_80211_NODE_IE);
2188 ic->ic_countryie = ieee80211_alloc_countryie(ic);
2189 if (ic->ic_countryie == NULL)
2191 ic->ic_countryie_chan = ic->ic_bsschan;
2193 return add_appie(frm, ic->ic_countryie);
2197 ieee80211_add_wpa(uint8_t *frm, const struct ieee80211vap *vap)
2199 if (vap->iv_flags & IEEE80211_F_WPA1 && vap->iv_wpa_ie != NULL)
2200 return (add_ie(frm, vap->iv_wpa_ie));
2202 /* XXX else complain? */
2208 ieee80211_add_rsn(uint8_t *frm, const struct ieee80211vap *vap)
2210 if (vap->iv_flags & IEEE80211_F_WPA2 && vap->iv_rsn_ie != NULL)
2211 return (add_ie(frm, vap->iv_rsn_ie));
2213 /* XXX else complain? */
2219 ieee80211_add_qos(uint8_t *frm, const struct ieee80211_node *ni)
2221 if (ni->ni_flags & IEEE80211_NODE_QOS) {
2222 *frm++ = IEEE80211_ELEMID_QOS;
2231 * Send a probe request frame with the specified ssid
2232 * and any optional information element data.
2235 ieee80211_send_probereq(struct ieee80211_node *ni,
2236 const uint8_t sa[IEEE80211_ADDR_LEN],
2237 const uint8_t da[IEEE80211_ADDR_LEN],
2238 const uint8_t bssid[IEEE80211_ADDR_LEN],
2239 const uint8_t *ssid, size_t ssidlen)
2241 struct ieee80211vap *vap = ni->ni_vap;
2242 struct ieee80211com *ic = ni->ni_ic;
2243 struct ieee80211_node *bss;
2244 const struct ieee80211_txparam *tp;
2245 struct ieee80211_bpf_params params;
2246 const struct ieee80211_rateset *rs;
2251 bss = ieee80211_ref_node(vap->iv_bss);
2253 if (vap->iv_state == IEEE80211_S_CAC) {
2254 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni,
2255 "block %s frame in CAC state", "probe request");
2256 vap->iv_stats.is_tx_badstate++;
2257 ieee80211_free_node(bss);
2258 return EIO; /* XXX */
2262 * Hold a reference on the node so it doesn't go away until after
2263 * the xmit is complete all the way in the driver. On error we
2264 * will remove our reference.
2266 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2267 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n",
2269 ni, ether_sprintf(ni->ni_macaddr),
2270 ieee80211_node_refcnt(ni)+1);
2271 ieee80211_ref_node(ni);
2274 * prreq frame format
2276 * [tlv] supported rates
2277 * [tlv] RSN (optional)
2278 * [tlv] extended supported rates
2279 * [tlv] HT cap (optional)
2280 * [tlv] VHT cap (optional)
2281 * [tlv] WPA (optional)
2282 * [tlv] user-specified ie's
2284 m = ieee80211_getmgtframe(&frm,
2285 ic->ic_headroom + sizeof(struct ieee80211_frame),
2286 2 + IEEE80211_NWID_LEN
2287 + 2 + IEEE80211_RATE_SIZE
2288 + sizeof(struct ieee80211_ie_htcap)
2289 + sizeof(struct ieee80211_ie_vhtcap)
2290 + sizeof(struct ieee80211_ie_htinfo) /* XXX not needed? */
2291 + sizeof(struct ieee80211_ie_wpa)
2292 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2293 + sizeof(struct ieee80211_ie_wpa)
2294 + (vap->iv_appie_probereq != NULL ?
2295 vap->iv_appie_probereq->ie_len : 0)
2298 vap->iv_stats.is_tx_nobuf++;
2299 ieee80211_free_node(ni);
2300 ieee80211_free_node(bss);
2304 frm = ieee80211_add_ssid(frm, ssid, ssidlen);
2305 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2306 frm = ieee80211_add_rates(frm, rs);
2307 frm = ieee80211_add_rsn(frm, vap);
2308 frm = ieee80211_add_xrates(frm, rs);
2311 * Note: we can't use bss; we don't have one yet.
2313 * So, we should announce our capabilities
2314 * in this channel mode (2g/5g), not the
2315 * channel details itself.
2317 if ((vap->iv_opmode == IEEE80211_M_IBSS) &&
2318 (vap->iv_flags_ht & IEEE80211_FHT_HT)) {
2319 struct ieee80211_channel *c;
2322 * Get the HT channel that we should try upgrading to.
2323 * If we can do 40MHz then this'll upgrade it appropriately.
2325 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
2327 frm = ieee80211_add_htcap_ch(frm, vap, c);
2331 * XXX TODO: need to figure out what/how to update the
2335 (vap->iv_flags_vht & IEEE80211_FVHT_VHT) {
2336 struct ieee80211_channel *c;
2338 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
2340 c = ieee80211_vht_adjust_channel(ic, c, vap->iv_flags_vht);
2341 frm = ieee80211_add_vhtcap_ch(frm, vap, c);
2345 frm = ieee80211_add_wpa(frm, vap);
2346 if (vap->iv_appie_probereq != NULL)
2347 frm = add_appie(frm, vap->iv_appie_probereq);
2348 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2350 KASSERT(M_LEADINGSPACE(m) >= sizeof(struct ieee80211_frame),
2351 ("leading space %zd", M_LEADINGSPACE(m)));
2352 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT);
2354 /* NB: cannot happen */
2355 ieee80211_free_node(ni);
2356 ieee80211_free_node(bss);
2360 IEEE80211_TX_LOCK(ic);
2361 ieee80211_send_setup(ni, m,
2362 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ,
2363 IEEE80211_NONQOS_TID, sa, da, bssid);
2364 /* XXX power management? */
2365 m->m_flags |= M_ENCAP; /* mark encapsulated */
2367 M_WME_SETAC(m, WME_AC_BE);
2369 IEEE80211_NODE_STAT(ni, tx_probereq);
2370 IEEE80211_NODE_STAT(ni, tx_mgmt);
2372 IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS,
2373 "send probe req on channel %u bssid %s sa %6D da %6D ssid \"%.*s\"\n",
2374 ieee80211_chan2ieee(ic, ic->ic_curchan),
2375 ether_sprintf(bssid),
2380 memset(¶ms, 0, sizeof(params));
2381 params.ibp_pri = M_WME_GETAC(m);
2382 tp = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)];
2383 params.ibp_rate0 = tp->mgmtrate;
2384 if (IEEE80211_IS_MULTICAST(da)) {
2385 params.ibp_flags |= IEEE80211_BPF_NOACK;
2386 params.ibp_try0 = 1;
2388 params.ibp_try0 = tp->maxretry;
2389 params.ibp_power = ni->ni_txpower;
2390 ret = ieee80211_raw_output(vap, ni, m, ¶ms);
2391 IEEE80211_TX_UNLOCK(ic);
2392 ieee80211_free_node(bss);
2397 * Calculate capability information for mgt frames.
2400 ieee80211_getcapinfo(struct ieee80211vap *vap, struct ieee80211_channel *chan)
2402 struct ieee80211com *ic = vap->iv_ic;
2405 KASSERT(vap->iv_opmode != IEEE80211_M_STA, ("station mode"));
2407 if (vap->iv_opmode == IEEE80211_M_HOSTAP)
2408 capinfo = IEEE80211_CAPINFO_ESS;
2409 else if (vap->iv_opmode == IEEE80211_M_IBSS)
2410 capinfo = IEEE80211_CAPINFO_IBSS;
2413 if (vap->iv_flags & IEEE80211_F_PRIVACY)
2414 capinfo |= IEEE80211_CAPINFO_PRIVACY;
2415 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
2416 IEEE80211_IS_CHAN_2GHZ(chan))
2417 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
2418 if (ic->ic_flags & IEEE80211_F_SHSLOT)
2419 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
2420 if (IEEE80211_IS_CHAN_5GHZ(chan) && (vap->iv_flags & IEEE80211_F_DOTH))
2421 capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT;
2426 * Send a management frame. The node is for the destination (or ic_bss
2427 * when in station mode). Nodes other than ic_bss have their reference
2428 * count bumped to reflect our use for an indeterminant time.
2431 ieee80211_send_mgmt(struct ieee80211_node *ni, int type, int arg)
2433 #define HTFLAGS (IEEE80211_NODE_HT | IEEE80211_NODE_HTCOMPAT)
2434 #define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0)
2435 struct ieee80211vap *vap = ni->ni_vap;
2436 struct ieee80211com *ic = ni->ni_ic;
2437 struct ieee80211_node *bss = vap->iv_bss;
2438 struct ieee80211_bpf_params params;
2442 int has_challenge, is_shared_key, ret, status;
2444 KASSERT(ni != NULL, ("null node"));
2447 * Hold a reference on the node so it doesn't go away until after
2448 * the xmit is complete all the way in the driver. On error we
2449 * will remove our reference.
2451 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2452 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n",
2454 ni, ether_sprintf(ni->ni_macaddr),
2455 ieee80211_node_refcnt(ni)+1);
2456 ieee80211_ref_node(ni);
2458 memset(¶ms, 0, sizeof(params));
2461 case IEEE80211_FC0_SUBTYPE_AUTH:
2464 has_challenge = ((arg == IEEE80211_AUTH_SHARED_CHALLENGE ||
2465 arg == IEEE80211_AUTH_SHARED_RESPONSE) &&
2466 ni->ni_challenge != NULL);
2469 * Deduce whether we're doing open authentication or
2470 * shared key authentication. We do the latter if
2471 * we're in the middle of a shared key authentication
2472 * handshake or if we're initiating an authentication
2473 * request and configured to use shared key.
2475 is_shared_key = has_challenge ||
2476 arg >= IEEE80211_AUTH_SHARED_RESPONSE ||
2477 (arg == IEEE80211_AUTH_SHARED_REQUEST &&
2478 bss->ni_authmode == IEEE80211_AUTH_SHARED);
2480 m = ieee80211_getmgtframe(&frm,
2481 ic->ic_headroom + sizeof(struct ieee80211_frame),
2482 3 * sizeof(uint16_t)
2483 + (has_challenge && status == IEEE80211_STATUS_SUCCESS ?
2484 sizeof(uint16_t)+IEEE80211_CHALLENGE_LEN : 0)
2487 senderr(ENOMEM, is_tx_nobuf);
2489 ((uint16_t *)frm)[0] =
2490 (is_shared_key) ? htole16(IEEE80211_AUTH_ALG_SHARED)
2491 : htole16(IEEE80211_AUTH_ALG_OPEN);
2492 ((uint16_t *)frm)[1] = htole16(arg); /* sequence number */
2493 ((uint16_t *)frm)[2] = htole16(status);/* status */
2495 if (has_challenge && status == IEEE80211_STATUS_SUCCESS) {
2496 ((uint16_t *)frm)[3] =
2497 htole16((IEEE80211_CHALLENGE_LEN << 8) |
2498 IEEE80211_ELEMID_CHALLENGE);
2499 memcpy(&((uint16_t *)frm)[4], ni->ni_challenge,
2500 IEEE80211_CHALLENGE_LEN);
2501 m->m_pkthdr.len = m->m_len =
2502 4 * sizeof(uint16_t) + IEEE80211_CHALLENGE_LEN;
2503 if (arg == IEEE80211_AUTH_SHARED_RESPONSE) {
2504 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni,
2505 "request encrypt frame (%s)", __func__);
2506 /* mark frame for encryption */
2507 params.ibp_flags |= IEEE80211_BPF_CRYPTO;
2510 m->m_pkthdr.len = m->m_len = 3 * sizeof(uint16_t);
2512 /* XXX not right for shared key */
2513 if (status == IEEE80211_STATUS_SUCCESS)
2514 IEEE80211_NODE_STAT(ni, tx_auth);
2516 IEEE80211_NODE_STAT(ni, tx_auth_fail);
2518 if (vap->iv_opmode == IEEE80211_M_STA)
2519 ieee80211_add_callback(m, ieee80211_tx_mgt_cb,
2520 (void *) vap->iv_state);
2523 case IEEE80211_FC0_SUBTYPE_DEAUTH:
2524 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni,
2525 "send station deauthenticate (reason: %d (%s))", arg,
2526 ieee80211_reason_to_string(arg));
2527 m = ieee80211_getmgtframe(&frm,
2528 ic->ic_headroom + sizeof(struct ieee80211_frame),
2531 senderr(ENOMEM, is_tx_nobuf);
2532 *(uint16_t *)frm = htole16(arg); /* reason */
2533 m->m_pkthdr.len = m->m_len = sizeof(uint16_t);
2535 IEEE80211_NODE_STAT(ni, tx_deauth);
2536 IEEE80211_NODE_STAT_SET(ni, tx_deauth_code, arg);
2538 ieee80211_node_unauthorize(ni); /* port closed */
2541 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
2542 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
2544 * asreq frame format
2545 * [2] capability information
2546 * [2] listen interval
2547 * [6*] current AP address (reassoc only)
2549 * [tlv] supported rates
2550 * [tlv] extended supported rates
2551 * [4] power capability (optional)
2552 * [28] supported channels (optional)
2553 * [tlv] HT capabilities
2554 * [tlv] VHT capabilities
2555 * [tlv] WME (optional)
2556 * [tlv] Vendor OUI HT capabilities (optional)
2557 * [tlv] Atheros capabilities (if negotiated)
2558 * [tlv] AppIE's (optional)
2560 m = ieee80211_getmgtframe(&frm,
2561 ic->ic_headroom + sizeof(struct ieee80211_frame),
2564 + IEEE80211_ADDR_LEN
2565 + 2 + IEEE80211_NWID_LEN
2566 + 2 + IEEE80211_RATE_SIZE
2567 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2570 + sizeof(struct ieee80211_wme_info)
2571 + sizeof(struct ieee80211_ie_htcap)
2572 + sizeof(struct ieee80211_ie_vhtcap)
2573 + 4 + sizeof(struct ieee80211_ie_htcap)
2574 #ifdef IEEE80211_SUPPORT_SUPERG
2575 + sizeof(struct ieee80211_ath_ie)
2577 + (vap->iv_appie_wpa != NULL ?
2578 vap->iv_appie_wpa->ie_len : 0)
2579 + (vap->iv_appie_assocreq != NULL ?
2580 vap->iv_appie_assocreq->ie_len : 0)
2583 senderr(ENOMEM, is_tx_nobuf);
2585 KASSERT(vap->iv_opmode == IEEE80211_M_STA,
2586 ("wrong mode %u", vap->iv_opmode));
2587 capinfo = IEEE80211_CAPINFO_ESS;
2588 if (vap->iv_flags & IEEE80211_F_PRIVACY)
2589 capinfo |= IEEE80211_CAPINFO_PRIVACY;
2591 * NB: Some 11a AP's reject the request when
2592 * short preamble is set.
2594 if ((ic->ic_flags & IEEE80211_F_SHPREAMBLE) &&
2595 IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan))
2596 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
2597 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
2598 (ic->ic_caps & IEEE80211_C_SHSLOT))
2599 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
2600 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) &&
2601 (vap->iv_flags & IEEE80211_F_DOTH))
2602 capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT;
2603 *(uint16_t *)frm = htole16(capinfo);
2606 KASSERT(bss->ni_intval != 0, ("beacon interval is zero!"));
2607 *(uint16_t *)frm = htole16(howmany(ic->ic_lintval,
2611 if (type == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) {
2612 IEEE80211_ADDR_COPY(frm, bss->ni_bssid);
2613 frm += IEEE80211_ADDR_LEN;
2616 frm = ieee80211_add_ssid(frm, ni->ni_essid, ni->ni_esslen);
2617 frm = ieee80211_add_rates(frm, &ni->ni_rates);
2618 frm = ieee80211_add_rsn(frm, vap);
2619 frm = ieee80211_add_xrates(frm, &ni->ni_rates);
2620 if (capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) {
2621 frm = ieee80211_add_powercapability(frm,
2623 frm = ieee80211_add_supportedchannels(frm, ic);
2627 * Check the channel - we may be using an 11n NIC with an
2628 * 11n capable station, but we're configured to be an 11b
2631 if ((vap->iv_flags_ht & IEEE80211_FHT_HT) &&
2632 IEEE80211_IS_CHAN_HT(ni->ni_chan) &&
2633 ni->ni_ies.htcap_ie != NULL &&
2634 ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_HTCAP) {
2635 frm = ieee80211_add_htcap(frm, ni);
2638 if ((vap->iv_flags_vht & IEEE80211_FVHT_VHT) &&
2639 IEEE80211_IS_CHAN_VHT(ni->ni_chan) &&
2640 ni->ni_ies.vhtcap_ie != NULL &&
2641 ni->ni_ies.vhtcap_ie[0] == IEEE80211_ELEMID_VHT_CAP) {
2642 frm = ieee80211_add_vhtcap(frm, ni);
2645 frm = ieee80211_add_wpa(frm, vap);
2646 if ((ic->ic_flags & IEEE80211_F_WME) &&
2647 ni->ni_ies.wme_ie != NULL)
2648 frm = ieee80211_add_wme_info(frm, &ic->ic_wme);
2651 * Same deal - only send HT info if we're on an 11n
2654 if ((vap->iv_flags_ht & IEEE80211_FHT_HT) &&
2655 IEEE80211_IS_CHAN_HT(ni->ni_chan) &&
2656 ni->ni_ies.htcap_ie != NULL &&
2657 ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_VENDOR) {
2658 frm = ieee80211_add_htcap_vendor(frm, ni);
2660 #ifdef IEEE80211_SUPPORT_SUPERG
2661 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS)) {
2662 frm = ieee80211_add_ath(frm,
2663 IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS),
2664 ((vap->iv_flags & IEEE80211_F_WPA) == 0 &&
2665 ni->ni_authmode != IEEE80211_AUTH_8021X) ?
2666 vap->iv_def_txkey : IEEE80211_KEYIX_NONE);
2668 #endif /* IEEE80211_SUPPORT_SUPERG */
2669 if (vap->iv_appie_assocreq != NULL)
2670 frm = add_appie(frm, vap->iv_appie_assocreq);
2671 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2673 ieee80211_add_callback(m, ieee80211_tx_mgt_cb,
2674 (void *) vap->iv_state);
2677 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2678 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2680 * asresp frame format
2681 * [2] capability information
2683 * [2] association ID
2684 * [tlv] supported rates
2685 * [tlv] extended supported rates
2686 * [tlv] HT capabilities (standard, if STA enabled)
2687 * [tlv] HT information (standard, if STA enabled)
2688 * [tlv] VHT capabilities (standard, if STA enabled)
2689 * [tlv] VHT information (standard, if STA enabled)
2690 * [tlv] WME (if configured and STA enabled)
2691 * [tlv] HT capabilities (vendor OUI, if STA enabled)
2692 * [tlv] HT information (vendor OUI, if STA enabled)
2693 * [tlv] Atheros capabilities (if STA enabled)
2694 * [tlv] AppIE's (optional)
2696 m = ieee80211_getmgtframe(&frm,
2697 ic->ic_headroom + sizeof(struct ieee80211_frame),
2701 + 2 + IEEE80211_RATE_SIZE
2702 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2703 + sizeof(struct ieee80211_ie_htcap) + 4
2704 + sizeof(struct ieee80211_ie_htinfo) + 4
2705 + sizeof(struct ieee80211_ie_vhtcap)
2706 + sizeof(struct ieee80211_ie_vht_operation)
2707 + sizeof(struct ieee80211_wme_param)
2708 #ifdef IEEE80211_SUPPORT_SUPERG
2709 + sizeof(struct ieee80211_ath_ie)
2711 + (vap->iv_appie_assocresp != NULL ?
2712 vap->iv_appie_assocresp->ie_len : 0)
2715 senderr(ENOMEM, is_tx_nobuf);
2717 capinfo = ieee80211_getcapinfo(vap, bss->ni_chan);
2718 *(uint16_t *)frm = htole16(capinfo);
2721 *(uint16_t *)frm = htole16(arg); /* status */
2724 if (arg == IEEE80211_STATUS_SUCCESS) {
2725 *(uint16_t *)frm = htole16(ni->ni_associd);
2726 IEEE80211_NODE_STAT(ni, tx_assoc);
2728 IEEE80211_NODE_STAT(ni, tx_assoc_fail);
2731 frm = ieee80211_add_rates(frm, &ni->ni_rates);
2732 frm = ieee80211_add_xrates(frm, &ni->ni_rates);
2733 /* NB: respond according to what we received */
2734 if ((ni->ni_flags & HTFLAGS) == IEEE80211_NODE_HT) {
2735 frm = ieee80211_add_htcap(frm, ni);
2736 frm = ieee80211_add_htinfo(frm, ni);
2738 if ((vap->iv_flags & IEEE80211_F_WME) &&
2739 ni->ni_ies.wme_ie != NULL)
2740 frm = ieee80211_add_wme_param(frm, &ic->ic_wme);
2741 if ((ni->ni_flags & HTFLAGS) == HTFLAGS) {
2742 frm = ieee80211_add_htcap_vendor(frm, ni);
2743 frm = ieee80211_add_htinfo_vendor(frm, ni);
2745 if (ni->ni_flags & IEEE80211_NODE_VHT) {
2746 frm = ieee80211_add_vhtcap(frm, ni);
2747 frm = ieee80211_add_vhtinfo(frm, ni);
2749 #ifdef IEEE80211_SUPPORT_SUPERG
2750 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS))
2751 frm = ieee80211_add_ath(frm,
2752 IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS),
2753 ((vap->iv_flags & IEEE80211_F_WPA) == 0 &&
2754 ni->ni_authmode != IEEE80211_AUTH_8021X) ?
2755 vap->iv_def_txkey : IEEE80211_KEYIX_NONE);
2756 #endif /* IEEE80211_SUPPORT_SUPERG */
2757 if (vap->iv_appie_assocresp != NULL)
2758 frm = add_appie(frm, vap->iv_appie_assocresp);
2759 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2762 case IEEE80211_FC0_SUBTYPE_DISASSOC:
2763 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
2764 "send station disassociate (reason: %d (%s))", arg,
2765 ieee80211_reason_to_string(arg));
2766 m = ieee80211_getmgtframe(&frm,
2767 ic->ic_headroom + sizeof(struct ieee80211_frame),
2770 senderr(ENOMEM, is_tx_nobuf);
2771 *(uint16_t *)frm = htole16(arg); /* reason */
2772 m->m_pkthdr.len = m->m_len = sizeof(uint16_t);
2774 IEEE80211_NODE_STAT(ni, tx_disassoc);
2775 IEEE80211_NODE_STAT_SET(ni, tx_disassoc_code, arg);
2779 IEEE80211_NOTE(vap, IEEE80211_MSG_ANY, ni,
2780 "invalid mgmt frame type %u", type);
2781 senderr(EINVAL, is_tx_unknownmgt);
2785 /* NB: force non-ProbeResp frames to the highest queue */
2786 params.ibp_pri = WME_AC_VO;
2787 params.ibp_rate0 = bss->ni_txparms->mgmtrate;
2788 /* NB: we know all frames are unicast */
2789 params.ibp_try0 = bss->ni_txparms->maxretry;
2790 params.ibp_power = bss->ni_txpower;
2791 return ieee80211_mgmt_output(ni, m, type, ¶ms);
2793 ieee80211_free_node(ni);
2800 * Return an mbuf with a probe response frame in it.
2801 * Space is left to prepend and 802.11 header at the
2802 * front but it's left to the caller to fill in.
2805 ieee80211_alloc_proberesp(struct ieee80211_node *bss, int legacy)
2807 struct ieee80211vap *vap = bss->ni_vap;
2808 struct ieee80211com *ic = bss->ni_ic;
2809 const struct ieee80211_rateset *rs;
2815 * probe response frame format
2817 * [2] beacon interval
2818 * [2] cabability information
2820 * [tlv] supported rates
2821 * [tlv] parameter set (FH/DS)
2822 * [tlv] parameter set (IBSS)
2823 * [tlv] country (optional)
2824 * [3] power control (optional)
2825 * [5] channel switch announcement (CSA) (optional)
2826 * [tlv] extended rate phy (ERP)
2827 * [tlv] extended supported rates
2828 * [tlv] RSN (optional)
2829 * [tlv] HT capabilities
2830 * [tlv] HT information
2831 * [tlv] VHT capabilities
2832 * [tlv] VHT information
2833 * [tlv] WPA (optional)
2834 * [tlv] WME (optional)
2835 * [tlv] Vendor OUI HT capabilities (optional)
2836 * [tlv] Vendor OUI HT information (optional)
2837 * [tlv] Atheros capabilities
2838 * [tlv] AppIE's (optional)
2839 * [tlv] Mesh ID (MBSS)
2840 * [tlv] Mesh Conf (MBSS)
2842 m = ieee80211_getmgtframe(&frm,
2843 ic->ic_headroom + sizeof(struct ieee80211_frame),
2847 + 2 + IEEE80211_NWID_LEN
2848 + 2 + IEEE80211_RATE_SIZE
2850 + IEEE80211_COUNTRY_MAX_SIZE
2852 + sizeof(struct ieee80211_csa_ie)
2853 + sizeof(struct ieee80211_quiet_ie)
2855 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2856 + sizeof(struct ieee80211_ie_wpa)
2857 + sizeof(struct ieee80211_ie_htcap)
2858 + sizeof(struct ieee80211_ie_htinfo)
2859 + sizeof(struct ieee80211_ie_wpa)
2860 + sizeof(struct ieee80211_wme_param)
2861 + 4 + sizeof(struct ieee80211_ie_htcap)
2862 + 4 + sizeof(struct ieee80211_ie_htinfo)
2863 + sizeof(struct ieee80211_ie_vhtcap)
2864 + sizeof(struct ieee80211_ie_vht_operation)
2865 #ifdef IEEE80211_SUPPORT_SUPERG
2866 + sizeof(struct ieee80211_ath_ie)
2868 #ifdef IEEE80211_SUPPORT_MESH
2869 + 2 + IEEE80211_MESHID_LEN
2870 + sizeof(struct ieee80211_meshconf_ie)
2872 + (vap->iv_appie_proberesp != NULL ?
2873 vap->iv_appie_proberesp->ie_len : 0)
2876 vap->iv_stats.is_tx_nobuf++;
2880 memset(frm, 0, 8); /* timestamp should be filled later */
2882 *(uint16_t *)frm = htole16(bss->ni_intval);
2884 capinfo = ieee80211_getcapinfo(vap, bss->ni_chan);
2885 *(uint16_t *)frm = htole16(capinfo);
2888 frm = ieee80211_add_ssid(frm, bss->ni_essid, bss->ni_esslen);
2889 rs = ieee80211_get_suprates(ic, bss->ni_chan);
2890 frm = ieee80211_add_rates(frm, rs);
2892 if (IEEE80211_IS_CHAN_FHSS(bss->ni_chan)) {
2893 *frm++ = IEEE80211_ELEMID_FHPARMS;
2895 *frm++ = bss->ni_fhdwell & 0x00ff;
2896 *frm++ = (bss->ni_fhdwell >> 8) & 0x00ff;
2897 *frm++ = IEEE80211_FH_CHANSET(
2898 ieee80211_chan2ieee(ic, bss->ni_chan));
2899 *frm++ = IEEE80211_FH_CHANPAT(
2900 ieee80211_chan2ieee(ic, bss->ni_chan));
2901 *frm++ = bss->ni_fhindex;
2903 *frm++ = IEEE80211_ELEMID_DSPARMS;
2905 *frm++ = ieee80211_chan2ieee(ic, bss->ni_chan);
2908 if (vap->iv_opmode == IEEE80211_M_IBSS) {
2909 *frm++ = IEEE80211_ELEMID_IBSSPARMS;
2911 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */
2913 if ((vap->iv_flags & IEEE80211_F_DOTH) ||
2914 (vap->iv_flags_ext & IEEE80211_FEXT_DOTD))
2915 frm = ieee80211_add_countryie(frm, ic);
2916 if (vap->iv_flags & IEEE80211_F_DOTH) {
2917 if (IEEE80211_IS_CHAN_5GHZ(bss->ni_chan))
2918 frm = ieee80211_add_powerconstraint(frm, vap);
2919 if (ic->ic_flags & IEEE80211_F_CSAPENDING)
2920 frm = ieee80211_add_csa(frm, vap);
2922 if (vap->iv_flags & IEEE80211_F_DOTH) {
2923 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) &&
2924 (vap->iv_flags_ext & IEEE80211_FEXT_DFS)) {
2926 frm = ieee80211_add_quiet(frm, vap, 0);
2929 if (IEEE80211_IS_CHAN_ANYG(bss->ni_chan))
2930 frm = ieee80211_add_erp(frm, ic);
2931 frm = ieee80211_add_xrates(frm, rs);
2932 frm = ieee80211_add_rsn(frm, vap);
2934 * NB: legacy 11b clients do not get certain ie's.
2935 * The caller identifies such clients by passing
2936 * a token in legacy to us. Could expand this to be
2937 * any legacy client for stuff like HT ie's.
2939 if (IEEE80211_IS_CHAN_HT(bss->ni_chan) &&
2940 legacy != IEEE80211_SEND_LEGACY_11B) {
2941 frm = ieee80211_add_htcap(frm, bss);
2942 frm = ieee80211_add_htinfo(frm, bss);
2944 if (IEEE80211_IS_CHAN_VHT(bss->ni_chan) &&
2945 legacy != IEEE80211_SEND_LEGACY_11B) {
2946 frm = ieee80211_add_vhtcap(frm, bss);
2947 frm = ieee80211_add_vhtinfo(frm, bss);
2949 frm = ieee80211_add_wpa(frm, vap);
2950 if (vap->iv_flags & IEEE80211_F_WME)
2951 frm = ieee80211_add_wme_param(frm, &ic->ic_wme);
2952 if (IEEE80211_IS_CHAN_HT(bss->ni_chan) &&
2953 (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) &&
2954 legacy != IEEE80211_SEND_LEGACY_11B) {
2955 frm = ieee80211_add_htcap_vendor(frm, bss);
2956 frm = ieee80211_add_htinfo_vendor(frm, bss);
2958 #ifdef IEEE80211_SUPPORT_SUPERG
2959 if ((vap->iv_flags & IEEE80211_F_ATHEROS) &&
2960 legacy != IEEE80211_SEND_LEGACY_11B)
2961 frm = ieee80211_add_athcaps(frm, bss);
2963 if (vap->iv_appie_proberesp != NULL)
2964 frm = add_appie(frm, vap->iv_appie_proberesp);
2965 #ifdef IEEE80211_SUPPORT_MESH
2966 if (vap->iv_opmode == IEEE80211_M_MBSS) {
2967 frm = ieee80211_add_meshid(frm, vap);
2968 frm = ieee80211_add_meshconf(frm, vap);
2971 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2977 * Send a probe response frame to the specified mac address.
2978 * This does not go through the normal mgt frame api so we
2979 * can specify the destination address and re-use the bss node
2980 * for the sta reference.
2983 ieee80211_send_proberesp(struct ieee80211vap *vap,
2984 const uint8_t da[IEEE80211_ADDR_LEN], int legacy)
2986 struct ieee80211_node *bss = vap->iv_bss;
2987 struct ieee80211com *ic = vap->iv_ic;
2991 if (vap->iv_state == IEEE80211_S_CAC) {
2992 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, bss,
2993 "block %s frame in CAC state", "probe response");
2994 vap->iv_stats.is_tx_badstate++;
2995 return EIO; /* XXX */
2999 * Hold a reference on the node so it doesn't go away until after
3000 * the xmit is complete all the way in the driver. On error we
3001 * will remove our reference.
3003 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
3004 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n",
3005 __func__, __LINE__, bss, ether_sprintf(bss->ni_macaddr),
3006 ieee80211_node_refcnt(bss)+1);
3007 ieee80211_ref_node(bss);
3009 m = ieee80211_alloc_proberesp(bss, legacy);
3011 ieee80211_free_node(bss);
3015 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT);
3016 KASSERT(m != NULL, ("no room for header"));
3018 IEEE80211_TX_LOCK(ic);
3019 ieee80211_send_setup(bss, m,
3020 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP,
3021 IEEE80211_NONQOS_TID, vap->iv_myaddr, da, bss->ni_bssid);
3022 /* XXX power management? */
3023 m->m_flags |= M_ENCAP; /* mark encapsulated */
3025 M_WME_SETAC(m, WME_AC_BE);
3027 IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS,
3028 "send probe resp on channel %u to %s%s\n",
3029 ieee80211_chan2ieee(ic, ic->ic_curchan), ether_sprintf(da),
3030 legacy ? " <legacy>" : "");
3031 IEEE80211_NODE_STAT(bss, tx_mgmt);
3033 ret = ieee80211_raw_output(vap, bss, m, NULL);
3034 IEEE80211_TX_UNLOCK(ic);
3039 * Allocate and build a RTS (Request To Send) control frame.
3042 ieee80211_alloc_rts(struct ieee80211com *ic,
3043 const uint8_t ra[IEEE80211_ADDR_LEN],
3044 const uint8_t ta[IEEE80211_ADDR_LEN],
3047 struct ieee80211_frame_rts *rts;
3050 /* XXX honor ic_headroom */
3051 m = m_gethdr(M_NOWAIT, MT_DATA);
3053 rts = mtod(m, struct ieee80211_frame_rts *);
3054 rts->i_fc[0] = IEEE80211_FC0_VERSION_0 |
3055 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_RTS;
3056 rts->i_fc[1] = IEEE80211_FC1_DIR_NODS;
3057 *(u_int16_t *)rts->i_dur = htole16(dur);
3058 IEEE80211_ADDR_COPY(rts->i_ra, ra);
3059 IEEE80211_ADDR_COPY(rts->i_ta, ta);
3061 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_rts);
3067 * Allocate and build a CTS (Clear To Send) control frame.
3070 ieee80211_alloc_cts(struct ieee80211com *ic,
3071 const uint8_t ra[IEEE80211_ADDR_LEN], uint16_t dur)
3073 struct ieee80211_frame_cts *cts;
3076 /* XXX honor ic_headroom */
3077 m = m_gethdr(M_NOWAIT, MT_DATA);
3079 cts = mtod(m, struct ieee80211_frame_cts *);
3080 cts->i_fc[0] = IEEE80211_FC0_VERSION_0 |
3081 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_CTS;
3082 cts->i_fc[1] = IEEE80211_FC1_DIR_NODS;
3083 *(u_int16_t *)cts->i_dur = htole16(dur);
3084 IEEE80211_ADDR_COPY(cts->i_ra, ra);
3086 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_cts);
3092 ieee80211_tx_mgt_timeout(void *arg)
3094 struct ieee80211vap *vap = arg;
3096 IEEE80211_LOCK(vap->iv_ic);
3097 if (vap->iv_state != IEEE80211_S_INIT &&
3098 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN) == 0) {
3100 * NB: it's safe to specify a timeout as the reason here;
3101 * it'll only be used in the right state.
3103 ieee80211_new_state_locked(vap, IEEE80211_S_SCAN,
3104 IEEE80211_SCAN_FAIL_TIMEOUT);
3106 IEEE80211_UNLOCK(vap->iv_ic);
3110 * This is the callback set on net80211-sourced transmitted
3111 * authentication request frames.
3113 * This does a couple of things:
3115 * + If the frame transmitted was a success, it schedules a future
3116 * event which will transition the interface to scan.
3117 * If a state transition _then_ occurs before that event occurs,
3118 * said state transition will cancel this callout.
3120 * + If the frame transmit was a failure, it immediately schedules
3121 * the transition back to scan.
3124 ieee80211_tx_mgt_cb(struct ieee80211_node *ni, void *arg, int status)
3126 struct ieee80211vap *vap = ni->ni_vap;
3127 enum ieee80211_state ostate = (enum ieee80211_state) arg;
3130 * Frame transmit completed; arrange timer callback. If
3131 * transmit was successfully we wait for response. Otherwise
3132 * we arrange an immediate callback instead of doing the
3133 * callback directly since we don't know what state the driver
3134 * is in (e.g. what locks it is holding). This work should
3135 * not be too time-critical and not happen too often so the
3136 * added overhead is acceptable.
3138 * XXX what happens if !acked but response shows up before callback?
3140 if (vap->iv_state == ostate) {
3141 callout_reset(&vap->iv_mgtsend,
3142 status == 0 ? IEEE80211_TRANS_WAIT*hz : 0,
3143 ieee80211_tx_mgt_timeout, vap);
3148 ieee80211_beacon_construct(struct mbuf *m, uint8_t *frm,
3149 struct ieee80211_node *ni)
3151 struct ieee80211vap *vap = ni->ni_vap;
3152 struct ieee80211_beacon_offsets *bo = &vap->iv_bcn_off;
3153 struct ieee80211com *ic = ni->ni_ic;
3154 struct ieee80211_rateset *rs = &ni->ni_rates;
3158 * beacon frame format
3160 * TODO: update to 802.11-2012; a lot of stuff has changed;
3161 * vendor extensions should be at the end, etc.
3164 * [2] beacon interval
3165 * [2] cabability information
3167 * [tlv] supported rates
3168 * [3] parameter set (DS)
3169 * [8] CF parameter set (optional)
3170 * [tlv] parameter set (IBSS/TIM)
3171 * [tlv] country (optional)
3172 * [3] power control (optional)
3173 * [5] channel switch announcement (CSA) (optional)
3175 * XXX TODO: IBSS DFS
3176 * XXX TODO: TPC report
3177 * [tlv] extended rate phy (ERP)
3178 * [tlv] extended supported rates
3179 * [tlv] RSN parameters
3181 * (XXX EDCA parameter set, QoS capability?)
3182 * XXX TODO: AP channel report
3184 * [tlv] HT capabilities
3185 * [tlv] HT information
3186 * XXX TODO: 20/40 BSS coexistence
3189 * XXX TODO: mesh config
3190 * XXX TODO: mesh awake window
3191 * XXX TODO: beacon timing (mesh, etc)
3192 * XXX TODO: MCCAOP Advertisement Overview
3193 * XXX TODO: MCCAOP Advertisement
3194 * XXX TODO: Mesh channel switch parameters
3196 * XXX TODO: VHT capabilities
3197 * XXX TODO: VHT operation
3198 * XXX TODO: VHT transmit power envelope
3199 * XXX TODO: channel switch wrapper element
3200 * XXX TODO: extended BSS load element
3202 * XXX Vendor-specific OIDs (e.g. Atheros)
3203 * [tlv] WPA parameters
3204 * [tlv] WME parameters
3205 * [tlv] Vendor OUI HT capabilities (optional)
3206 * [tlv] Vendor OUI HT information (optional)
3207 * [tlv] Atheros capabilities (optional)
3208 * [tlv] TDMA parameters (optional)
3209 * [tlv] Mesh ID (MBSS)
3210 * [tlv] Mesh Conf (MBSS)
3211 * [tlv] application data (optional)
3214 memset(bo, 0, sizeof(*bo));
3216 memset(frm, 0, 8); /* XXX timestamp is set by hardware/driver */
3218 *(uint16_t *)frm = htole16(ni->ni_intval);
3220 capinfo = ieee80211_getcapinfo(vap, ni->ni_chan);
3221 bo->bo_caps = (uint16_t *)frm;
3222 *(uint16_t *)frm = htole16(capinfo);
3224 *frm++ = IEEE80211_ELEMID_SSID;
3225 if ((vap->iv_flags & IEEE80211_F_HIDESSID) == 0) {
3226 *frm++ = ni->ni_esslen;
3227 memcpy(frm, ni->ni_essid, ni->ni_esslen);
3228 frm += ni->ni_esslen;
3231 frm = ieee80211_add_rates(frm, rs);
3232 if (!IEEE80211_IS_CHAN_FHSS(ni->ni_chan)) {
3233 *frm++ = IEEE80211_ELEMID_DSPARMS;
3235 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan);
3237 if (ic->ic_flags & IEEE80211_F_PCF) {
3239 frm = ieee80211_add_cfparms(frm, ic);
3242 if (vap->iv_opmode == IEEE80211_M_IBSS) {
3243 *frm++ = IEEE80211_ELEMID_IBSSPARMS;
3245 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */
3247 } else if (vap->iv_opmode == IEEE80211_M_HOSTAP ||
3248 vap->iv_opmode == IEEE80211_M_MBSS) {
3249 /* TIM IE is the same for Mesh and Hostap */
3250 struct ieee80211_tim_ie *tie = (struct ieee80211_tim_ie *) frm;
3252 tie->tim_ie = IEEE80211_ELEMID_TIM;
3253 tie->tim_len = 4; /* length */
3254 tie->tim_count = 0; /* DTIM count */
3255 tie->tim_period = vap->iv_dtim_period; /* DTIM period */
3256 tie->tim_bitctl = 0; /* bitmap control */
3257 tie->tim_bitmap[0] = 0; /* Partial Virtual Bitmap */
3258 frm += sizeof(struct ieee80211_tim_ie);
3261 bo->bo_tim_trailer = frm;
3262 if ((vap->iv_flags & IEEE80211_F_DOTH) ||
3263 (vap->iv_flags_ext & IEEE80211_FEXT_DOTD))
3264 frm = ieee80211_add_countryie(frm, ic);
3265 if (vap->iv_flags & IEEE80211_F_DOTH) {
3266 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan))
3267 frm = ieee80211_add_powerconstraint(frm, vap);
3269 if (ic->ic_flags & IEEE80211_F_CSAPENDING)
3270 frm = ieee80211_add_csa(frm, vap);
3274 bo->bo_quiet = NULL;
3275 if (vap->iv_flags & IEEE80211_F_DOTH) {
3276 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) &&
3277 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) &&
3278 (vap->iv_quiet == 1)) {
3280 * We only insert the quiet IE offset if
3281 * the quiet IE is enabled. Otherwise don't
3282 * put it here or we'll just overwrite
3283 * some other beacon contents.
3285 if (vap->iv_quiet) {
3287 frm = ieee80211_add_quiet(frm,vap, 0);
3292 if (IEEE80211_IS_CHAN_ANYG(ni->ni_chan)) {
3294 frm = ieee80211_add_erp(frm, ic);
3296 frm = ieee80211_add_xrates(frm, rs);
3297 frm = ieee80211_add_rsn(frm, vap);
3298 if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) {
3299 frm = ieee80211_add_htcap(frm, ni);
3300 bo->bo_htinfo = frm;
3301 frm = ieee80211_add_htinfo(frm, ni);
3304 if (IEEE80211_IS_CHAN_VHT(ni->ni_chan)) {
3305 frm = ieee80211_add_vhtcap(frm, ni);
3306 bo->bo_vhtinfo = frm;
3307 frm = ieee80211_add_vhtinfo(frm, ni);
3308 /* Transmit power envelope */
3309 /* Channel switch wrapper element */
3310 /* Extended bss load element */
3313 frm = ieee80211_add_wpa(frm, vap);
3314 if (vap->iv_flags & IEEE80211_F_WME) {
3316 frm = ieee80211_add_wme_param(frm, &ic->ic_wme);
3318 if (IEEE80211_IS_CHAN_HT(ni->ni_chan) &&
3319 (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT)) {
3320 frm = ieee80211_add_htcap_vendor(frm, ni);
3321 frm = ieee80211_add_htinfo_vendor(frm, ni);
3324 #ifdef IEEE80211_SUPPORT_SUPERG
3325 if (vap->iv_flags & IEEE80211_F_ATHEROS) {
3327 frm = ieee80211_add_athcaps(frm, ni);
3330 #ifdef IEEE80211_SUPPORT_TDMA
3331 if (vap->iv_caps & IEEE80211_C_TDMA) {
3333 frm = ieee80211_add_tdma(frm, vap);
3336 if (vap->iv_appie_beacon != NULL) {
3338 bo->bo_appie_len = vap->iv_appie_beacon->ie_len;
3339 frm = add_appie(frm, vap->iv_appie_beacon);
3342 /* XXX TODO: move meshid/meshconf up to before vendor extensions? */
3343 #ifdef IEEE80211_SUPPORT_MESH
3344 if (vap->iv_opmode == IEEE80211_M_MBSS) {
3345 frm = ieee80211_add_meshid(frm, vap);
3346 bo->bo_meshconf = frm;
3347 frm = ieee80211_add_meshconf(frm, vap);
3350 bo->bo_tim_trailer_len = frm - bo->bo_tim_trailer;
3351 bo->bo_csa_trailer_len = frm - bo->bo_csa;
3352 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
3356 * Allocate a beacon frame and fillin the appropriate bits.
3359 ieee80211_beacon_alloc(struct ieee80211_node *ni)
3361 struct ieee80211vap *vap = ni->ni_vap;
3362 struct ieee80211com *ic = ni->ni_ic;
3363 struct ifnet *ifp = vap->iv_ifp;
3364 struct ieee80211_frame *wh;
3370 * Update the "We're putting the quiet IE in the beacon" state.
3372 if (vap->iv_quiet == 1)
3373 vap->iv_flags_ext |= IEEE80211_FEXT_QUIET_IE;
3374 else if (vap->iv_quiet == 0)
3375 vap->iv_flags_ext &= ~IEEE80211_FEXT_QUIET_IE;
3378 * beacon frame format
3380 * Note: This needs updating for 802.11-2012.
3383 * [2] beacon interval
3384 * [2] cabability information
3386 * [tlv] supported rates
3387 * [3] parameter set (DS)
3388 * [8] CF parameter set (optional)
3389 * [tlv] parameter set (IBSS/TIM)
3390 * [tlv] country (optional)
3391 * [3] power control (optional)
3392 * [5] channel switch announcement (CSA) (optional)
3393 * [tlv] extended rate phy (ERP)
3394 * [tlv] extended supported rates
3395 * [tlv] RSN parameters
3396 * [tlv] HT capabilities
3397 * [tlv] HT information
3398 * [tlv] VHT capabilities
3399 * [tlv] VHT operation
3400 * [tlv] Vendor OUI HT capabilities (optional)
3401 * [tlv] Vendor OUI HT information (optional)
3402 * XXX Vendor-specific OIDs (e.g. Atheros)
3403 * [tlv] WPA parameters
3404 * [tlv] WME parameters
3405 * [tlv] TDMA parameters (optional)
3406 * [tlv] Mesh ID (MBSS)
3407 * [tlv] Mesh Conf (MBSS)
3408 * [tlv] application data (optional)
3409 * NB: we allocate the max space required for the TIM bitmap.
3410 * XXX how big is this?
3412 pktlen = 8 /* time stamp */
3413 + sizeof(uint16_t) /* beacon interval */
3414 + sizeof(uint16_t) /* capabilities */
3415 + 2 + ni->ni_esslen /* ssid */
3416 + 2 + IEEE80211_RATE_SIZE /* supported rates */
3417 + 2 + 1 /* DS parameters */
3418 + 2 + 6 /* CF parameters */
3419 + 2 + 4 + vap->iv_tim_len /* DTIM/IBSSPARMS */
3420 + IEEE80211_COUNTRY_MAX_SIZE /* country */
3421 + 2 + 1 /* power control */
3422 + sizeof(struct ieee80211_csa_ie) /* CSA */
3423 + sizeof(struct ieee80211_quiet_ie) /* Quiet */
3425 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
3426 + (vap->iv_caps & IEEE80211_C_WPA ? /* WPA 1+2 */
3427 2*sizeof(struct ieee80211_ie_wpa) : 0)
3428 /* XXX conditional? */
3429 + 4+2*sizeof(struct ieee80211_ie_htcap)/* HT caps */
3430 + 4+2*sizeof(struct ieee80211_ie_htinfo)/* HT info */
3431 + sizeof(struct ieee80211_ie_vhtcap)/* VHT caps */
3432 + sizeof(struct ieee80211_ie_vht_operation)/* VHT info */
3433 + (vap->iv_caps & IEEE80211_C_WME ? /* WME */
3434 sizeof(struct ieee80211_wme_param) : 0)
3435 #ifdef IEEE80211_SUPPORT_SUPERG
3436 + sizeof(struct ieee80211_ath_ie) /* ATH */
3438 #ifdef IEEE80211_SUPPORT_TDMA
3439 + (vap->iv_caps & IEEE80211_C_TDMA ? /* TDMA */
3440 sizeof(struct ieee80211_tdma_param) : 0)
3442 #ifdef IEEE80211_SUPPORT_MESH
3443 + 2 + ni->ni_meshidlen
3444 + sizeof(struct ieee80211_meshconf_ie)
3446 + IEEE80211_MAX_APPIE
3448 m = ieee80211_getmgtframe(&frm,
3449 ic->ic_headroom + sizeof(struct ieee80211_frame), pktlen);
3451 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
3452 "%s: cannot get buf; size %u\n", __func__, pktlen);
3453 vap->iv_stats.is_tx_nobuf++;
3456 ieee80211_beacon_construct(m, frm, ni);
3458 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT);
3459 KASSERT(m != NULL, ("no space for 802.11 header?"));
3460 wh = mtod(m, struct ieee80211_frame *);
3461 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT |
3462 IEEE80211_FC0_SUBTYPE_BEACON;
3463 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
3464 *(uint16_t *)wh->i_dur = 0;
3465 IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr);
3466 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
3467 IEEE80211_ADDR_COPY(wh->i_addr3, ni->ni_bssid);
3468 *(uint16_t *)wh->i_seq = 0;
3474 * Update the dynamic parts of a beacon frame based on the current state.
3477 ieee80211_beacon_update(struct ieee80211_node *ni, struct mbuf *m, int mcast)
3479 struct ieee80211vap *vap = ni->ni_vap;
3480 struct ieee80211_beacon_offsets *bo = &vap->iv_bcn_off;
3481 struct ieee80211com *ic = ni->ni_ic;
3482 int len_changed = 0;
3484 struct ieee80211_frame *wh;
3485 ieee80211_seq seqno;
3489 * Handle 11h channel change when we've reached the count.
3490 * We must recalculate the beacon frame contents to account
3491 * for the new channel. Note we do this only for the first
3492 * vap that reaches this point; subsequent vaps just update
3493 * their beacon state to reflect the recalculated channel.
3495 if (isset(bo->bo_flags, IEEE80211_BEACON_CSA) &&
3496 vap->iv_csa_count == ic->ic_csa_count) {
3497 vap->iv_csa_count = 0;
3499 * Effect channel change before reconstructing the beacon
3500 * frame contents as many places reference ni_chan.
3502 if (ic->ic_csa_newchan != NULL)
3503 ieee80211_csa_completeswitch(ic);
3505 * NB: ieee80211_beacon_construct clears all pending
3506 * updates in bo_flags so we don't need to explicitly
3507 * clear IEEE80211_BEACON_CSA.
3509 ieee80211_beacon_construct(m,
3510 mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), ni);
3512 /* XXX do WME aggressive mode processing? */
3513 IEEE80211_UNLOCK(ic);
3514 return 1; /* just assume length changed */
3518 * Handle the quiet time element being added and removed.
3519 * Again, for now we just cheat and reconstruct the whole
3520 * beacon - that way the gap is provided as appropriate.
3522 * So, track whether we have already added the IE versus
3523 * whether we want to be adding the IE.
3525 if ((vap->iv_flags_ext & IEEE80211_FEXT_QUIET_IE) &&
3526 (vap->iv_quiet == 0)) {
3528 * Quiet time beacon IE enabled, but it's disabled;
3531 vap->iv_flags_ext &= ~IEEE80211_FEXT_QUIET_IE;
3532 ieee80211_beacon_construct(m,
3533 mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), ni);
3534 /* XXX do WME aggressive mode processing? */
3535 IEEE80211_UNLOCK(ic);
3536 return 1; /* just assume length changed */
3539 if (((vap->iv_flags_ext & IEEE80211_FEXT_QUIET_IE) == 0) &&
3540 (vap->iv_quiet == 1)) {
3542 * Quiet time beacon IE disabled, but it's now enabled;
3545 vap->iv_flags_ext |= IEEE80211_FEXT_QUIET_IE;
3546 ieee80211_beacon_construct(m,
3547 mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), ni);
3548 /* XXX do WME aggressive mode processing? */
3549 IEEE80211_UNLOCK(ic);
3550 return 1; /* just assume length changed */
3553 wh = mtod(m, struct ieee80211_frame *);
3556 * XXX TODO Strictly speaking this should be incremented with the TX
3557 * lock held so as to serialise access to the non-qos TID sequence
3560 * If the driver identifies it does its own TX seqno management then
3561 * we can skip this (and still not do the TX seqno.)
3563 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++;
3564 *(uint16_t *)&wh->i_seq[0] =
3565 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
3566 M_SEQNO_SET(m, seqno);
3568 /* XXX faster to recalculate entirely or just changes? */
3569 capinfo = ieee80211_getcapinfo(vap, ni->ni_chan);
3570 *bo->bo_caps = htole16(capinfo);
3572 if (vap->iv_flags & IEEE80211_F_WME) {
3573 struct ieee80211_wme_state *wme = &ic->ic_wme;
3576 * Check for aggressive mode change. When there is
3577 * significant high priority traffic in the BSS
3578 * throttle back BE traffic by using conservative
3579 * parameters. Otherwise BE uses aggressive params
3580 * to optimize performance of legacy/non-QoS traffic.
3582 if (wme->wme_flags & WME_F_AGGRMODE) {
3583 if (wme->wme_hipri_traffic >
3584 wme->wme_hipri_switch_thresh) {
3585 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
3586 "%s: traffic %u, disable aggressive mode\n",
3587 __func__, wme->wme_hipri_traffic);
3588 wme->wme_flags &= ~WME_F_AGGRMODE;
3589 ieee80211_wme_updateparams_locked(vap);
3590 wme->wme_hipri_traffic =
3591 wme->wme_hipri_switch_hysteresis;
3593 wme->wme_hipri_traffic = 0;
3595 if (wme->wme_hipri_traffic <=
3596 wme->wme_hipri_switch_thresh) {
3597 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
3598 "%s: traffic %u, enable aggressive mode\n",
3599 __func__, wme->wme_hipri_traffic);
3600 wme->wme_flags |= WME_F_AGGRMODE;
3601 ieee80211_wme_updateparams_locked(vap);
3602 wme->wme_hipri_traffic = 0;
3604 wme->wme_hipri_traffic =
3605 wme->wme_hipri_switch_hysteresis;
3607 if (isset(bo->bo_flags, IEEE80211_BEACON_WME)) {
3608 (void) ieee80211_add_wme_param(bo->bo_wme, wme);
3609 clrbit(bo->bo_flags, IEEE80211_BEACON_WME);
3613 if (isset(bo->bo_flags, IEEE80211_BEACON_HTINFO)) {
3614 ieee80211_ht_update_beacon(vap, bo);
3615 clrbit(bo->bo_flags, IEEE80211_BEACON_HTINFO);
3617 #ifdef IEEE80211_SUPPORT_TDMA
3618 if (vap->iv_caps & IEEE80211_C_TDMA) {
3620 * NB: the beacon is potentially updated every TBTT.
3622 ieee80211_tdma_update_beacon(vap, bo);
3625 #ifdef IEEE80211_SUPPORT_MESH
3626 if (vap->iv_opmode == IEEE80211_M_MBSS)
3627 ieee80211_mesh_update_beacon(vap, bo);
3630 if (vap->iv_opmode == IEEE80211_M_HOSTAP ||
3631 vap->iv_opmode == IEEE80211_M_MBSS) { /* NB: no IBSS support*/
3632 struct ieee80211_tim_ie *tie =
3633 (struct ieee80211_tim_ie *) bo->bo_tim;
3634 if (isset(bo->bo_flags, IEEE80211_BEACON_TIM)) {
3635 u_int timlen, timoff, i;
3637 * ATIM/DTIM needs updating. If it fits in the
3638 * current space allocated then just copy in the
3639 * new bits. Otherwise we need to move any trailing
3640 * data to make room. Note that we know there is
3641 * contiguous space because ieee80211_beacon_allocate
3642 * insures there is space in the mbuf to write a
3643 * maximal-size virtual bitmap (based on iv_max_aid).
3646 * Calculate the bitmap size and offset, copy any
3647 * trailer out of the way, and then copy in the
3648 * new bitmap and update the information element.
3649 * Note that the tim bitmap must contain at least
3650 * one byte and any offset must be even.
3652 if (vap->iv_ps_pending != 0) {
3653 timoff = 128; /* impossibly large */
3654 for (i = 0; i < vap->iv_tim_len; i++)
3655 if (vap->iv_tim_bitmap[i]) {
3659 KASSERT(timoff != 128, ("tim bitmap empty!"));
3660 for (i = vap->iv_tim_len-1; i >= timoff; i--)
3661 if (vap->iv_tim_bitmap[i])
3663 timlen = 1 + (i - timoff);
3670 * TODO: validate this!
3672 if (timlen != bo->bo_tim_len) {
3673 /* copy up/down trailer */
3674 int adjust = tie->tim_bitmap+timlen
3675 - bo->bo_tim_trailer;
3676 ovbcopy(bo->bo_tim_trailer,
3677 bo->bo_tim_trailer+adjust,
3678 bo->bo_tim_trailer_len);
3679 bo->bo_tim_trailer += adjust;
3680 bo->bo_erp += adjust;
3681 bo->bo_htinfo += adjust;
3682 bo->bo_vhtinfo += adjust;
3683 #ifdef IEEE80211_SUPPORT_SUPERG
3684 bo->bo_ath += adjust;
3686 #ifdef IEEE80211_SUPPORT_TDMA
3687 bo->bo_tdma += adjust;
3689 #ifdef IEEE80211_SUPPORT_MESH
3690 bo->bo_meshconf += adjust;
3692 bo->bo_appie += adjust;
3693 bo->bo_wme += adjust;
3694 bo->bo_csa += adjust;
3695 bo->bo_quiet += adjust;
3696 bo->bo_tim_len = timlen;
3698 /* update information element */
3699 tie->tim_len = 3 + timlen;
3700 tie->tim_bitctl = timoff;
3703 memcpy(tie->tim_bitmap, vap->iv_tim_bitmap + timoff,
3706 clrbit(bo->bo_flags, IEEE80211_BEACON_TIM);
3708 IEEE80211_DPRINTF(vap, IEEE80211_MSG_POWER,
3709 "%s: TIM updated, pending %u, off %u, len %u\n",
3710 __func__, vap->iv_ps_pending, timoff, timlen);
3712 /* count down DTIM period */
3713 if (tie->tim_count == 0)
3714 tie->tim_count = tie->tim_period - 1;
3717 /* update state for buffered multicast frames on DTIM */
3718 if (mcast && tie->tim_count == 0)
3719 tie->tim_bitctl |= 1;
3721 tie->tim_bitctl &= ~1;
3722 if (isset(bo->bo_flags, IEEE80211_BEACON_CSA)) {
3723 struct ieee80211_csa_ie *csa =
3724 (struct ieee80211_csa_ie *) bo->bo_csa;
3727 * Insert or update CSA ie. If we're just starting
3728 * to count down to the channel switch then we need
3729 * to insert the CSA ie. Otherwise we just need to
3730 * drop the count. The actual change happens above
3731 * when the vap's count reaches the target count.
3733 if (vap->iv_csa_count == 0) {
3734 memmove(&csa[1], csa, bo->bo_csa_trailer_len);
3735 bo->bo_erp += sizeof(*csa);
3736 bo->bo_htinfo += sizeof(*csa);
3737 bo->bo_vhtinfo += sizeof(*csa);
3738 bo->bo_wme += sizeof(*csa);
3739 #ifdef IEEE80211_SUPPORT_SUPERG
3740 bo->bo_ath += sizeof(*csa);
3742 #ifdef IEEE80211_SUPPORT_TDMA
3743 bo->bo_tdma += sizeof(*csa);
3745 #ifdef IEEE80211_SUPPORT_MESH
3746 bo->bo_meshconf += sizeof(*csa);
3748 bo->bo_appie += sizeof(*csa);
3749 bo->bo_csa_trailer_len += sizeof(*csa);
3750 bo->bo_quiet += sizeof(*csa);
3751 bo->bo_tim_trailer_len += sizeof(*csa);
3752 m->m_len += sizeof(*csa);
3753 m->m_pkthdr.len += sizeof(*csa);
3755 ieee80211_add_csa(bo->bo_csa, vap);
3758 vap->iv_csa_count++;
3759 /* NB: don't clear IEEE80211_BEACON_CSA */
3763 * Only add the quiet time IE if we've enabled it
3766 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) &&
3767 (vap->iv_flags_ext & IEEE80211_FEXT_DFS)) {
3768 if (vap->iv_quiet &&
3769 (vap->iv_flags_ext & IEEE80211_FEXT_QUIET_IE)) {
3770 ieee80211_add_quiet(bo->bo_quiet, vap, 1);
3773 if (isset(bo->bo_flags, IEEE80211_BEACON_ERP)) {
3775 * ERP element needs updating.
3777 (void) ieee80211_add_erp(bo->bo_erp, ic);
3778 clrbit(bo->bo_flags, IEEE80211_BEACON_ERP);
3780 #ifdef IEEE80211_SUPPORT_SUPERG
3781 if (isset(bo->bo_flags, IEEE80211_BEACON_ATH)) {
3782 ieee80211_add_athcaps(bo->bo_ath, ni);
3783 clrbit(bo->bo_flags, IEEE80211_BEACON_ATH);
3787 if (isset(bo->bo_flags, IEEE80211_BEACON_APPIE)) {
3788 const struct ieee80211_appie *aie = vap->iv_appie_beacon;
3794 aielen += aie->ie_len;
3795 if (aielen != bo->bo_appie_len) {
3796 /* copy up/down trailer */
3797 int adjust = aielen - bo->bo_appie_len;
3798 ovbcopy(bo->bo_tim_trailer, bo->bo_tim_trailer+adjust,
3799 bo->bo_tim_trailer_len);
3800 bo->bo_tim_trailer += adjust;
3801 bo->bo_appie += adjust;
3802 bo->bo_appie_len = aielen;
3808 frm = add_appie(frm, aie);
3809 clrbit(bo->bo_flags, IEEE80211_BEACON_APPIE);
3811 IEEE80211_UNLOCK(ic);
3817 * Do Ethernet-LLC encapsulation for each payload in a fast frame
3818 * tunnel encapsulation. The frame is assumed to have an Ethernet
3819 * header at the front that must be stripped before prepending the
3820 * LLC followed by the Ethernet header passed in (with an Ethernet
3821 * type that specifies the payload size).
3824 ieee80211_ff_encap1(struct ieee80211vap *vap, struct mbuf *m,
3825 const struct ether_header *eh)
3830 /* XXX optimize by combining m_adj+M_PREPEND */
3831 m_adj(m, sizeof(struct ether_header) - sizeof(struct llc));
3832 llc = mtod(m, struct llc *);
3833 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP;
3834 llc->llc_control = LLC_UI;
3835 llc->llc_snap.org_code[0] = 0;
3836 llc->llc_snap.org_code[1] = 0;
3837 llc->llc_snap.org_code[2] = 0;
3838 llc->llc_snap.ether_type = eh->ether_type;
3839 payload = m->m_pkthdr.len; /* NB: w/o Ethernet header */
3841 M_PREPEND(m, sizeof(struct ether_header), M_NOWAIT);
3842 if (m == NULL) { /* XXX cannot happen */
3843 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
3844 "%s: no space for ether_header\n", __func__);
3845 vap->iv_stats.is_tx_nobuf++;
3848 ETHER_HEADER_COPY(mtod(m, void *), eh);
3849 mtod(m, struct ether_header *)->ether_type = htons(payload);
3854 * Complete an mbuf transmission.
3856 * For now, this simply processes a completed frame after the
3857 * driver has completed it's transmission and/or retransmission.
3858 * It assumes the frame is an 802.11 encapsulated frame.
3860 * Later on it will grow to become the exit path for a given frame
3861 * from the driver and, depending upon how it's been encapsulated
3862 * and already transmitted, it may end up doing A-MPDU retransmission,
3863 * power save requeuing, etc.
3865 * In order for the above to work, the driver entry point to this
3866 * must not hold any driver locks. Thus, the driver needs to delay
3867 * any actual mbuf completion until it can release said locks.
3869 * This frees the mbuf and if the mbuf has a node reference,
3870 * the node reference will be freed.
3873 ieee80211_tx_complete(struct ieee80211_node *ni, struct mbuf *m, int status)
3877 struct ifnet *ifp = ni->ni_vap->iv_ifp;
3880 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len);
3881 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
3882 if (m->m_flags & M_MCAST)
3883 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1);
3885 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
3886 if (m->m_flags & M_TXCB)
3887 ieee80211_process_callback(ni, m, status);
3888 ieee80211_free_node(ni);