1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2001 Atsushi Onoe
5 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
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.
16 *
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.
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31
32 #include "opt_inet.h"
33 #include "opt_inet6.h"
34 #include "opt_wlan.h"
35
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/kernel.h>
39 #include <sys/malloc.h>
40 #include <sys/mbuf.h>
41 #include <sys/endian.h>
42
43 #include <sys/socket.h>
44
45 #include <net/bpf.h>
46 #include <net/ethernet.h>
47 #include <net/if.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>
52
53 #include <net80211/ieee80211_var.h>
54 #include <net80211/ieee80211_regdomain.h>
55 #ifdef IEEE80211_SUPPORT_SUPERG
56 #include <net80211/ieee80211_superg.h>
57 #endif
58 #ifdef IEEE80211_SUPPORT_TDMA
59 #include <net80211/ieee80211_tdma.h>
60 #endif
61 #include <net80211/ieee80211_wds.h>
62 #include <net80211/ieee80211_mesh.h>
63 #include <net80211/ieee80211_vht.h>
64
65 #if defined(INET) || defined(INET6)
66 #include <netinet/in.h>
67 #endif
68
69 #ifdef INET
70 #include <netinet/if_ether.h>
71 #include <netinet/in_systm.h>
72 #include <netinet/ip.h>
73 #endif
74 #ifdef INET6
75 #include <netinet/ip6.h>
76 #endif
77
78 #include <security/mac/mac_framework.h>
79
80 #define ETHER_HEADER_COPY(dst, src) \
81 memcpy(dst, src, sizeof(struct ether_header))
82
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);
86
87 #ifdef IEEE80211_DEBUG
88 /*
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
92 * (e.g. beacons).
93 */
94 static __inline int
95 doprint(struct ieee80211vap *vap, int subtype)
96 {
97 switch (subtype) {
98 case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
99 return (vap->iv_opmode == IEEE80211_M_IBSS);
100 }
101 return 1;
102 }
103 #endif
104
105 /*
106 * Transmit a frame to the given destination on the given VAP.
107 *
108 * It's up to the caller to figure out the details of who this
109 * is going to and resolving the node.
110 *
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.
114 *
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,
119 * if appropriate.)
120 */
121 int
122 ieee80211_vap_pkt_send_dest(struct ieee80211vap *vap, struct mbuf *m,
123 struct ieee80211_node *ni)
124 {
125 struct ieee80211com *ic = vap->iv_ic;
126 struct ifnet *ifp = vap->iv_ifp;
127 int mcast;
128 int do_ampdu = 0;
129 int do_amsdu = 0;
130 int do_ampdu_amsdu = 0;
131 int no_ampdu = 1; /* Will be set to 0 if ampdu is active */
132 int do_ff = 0;
133
134 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) &&
135 (m->m_flags & M_PWR_SAV) == 0) {
136 /*
137 * Station in power save mode; pass the frame
138 * to the 802.11 layer and continue. We'll get
139 * the frame back when the time is right.
140 * XXX lose WDS vap linkage?
141 */
142 if (ieee80211_pwrsave(ni, m) != 0)
143 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
144 ieee80211_free_node(ni);
145
146 /*
147 * We queued it fine, so tell the upper layer
148 * that we consumed it.
149 */
150 return (0);
151 }
152 /* calculate priority so drivers can find the tx queue */
153 if (ieee80211_classify(ni, m)) {
154 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT,
155 ni->ni_macaddr, NULL,
156 "%s", "classification failure");
157 vap->iv_stats.is_tx_classify++;
158 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
159 m_freem(m);
160 ieee80211_free_node(ni);
161
162 /* XXX better status? */
163 return (0);
164 }
165 /*
166 * Stash the node pointer. Note that we do this after
167 * any call to ieee80211_dwds_mcast because that code
168 * uses any existing value for rcvif to identify the
169 * interface it (might have been) received on.
170 */
171 m->m_pkthdr.rcvif = (void *)ni;
172 mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1: 0;
173
174 BPF_MTAP(ifp, m); /* 802.3 tx */
175
176
177 /*
178 * Figure out if we can do A-MPDU, A-MSDU or FF.
179 *
180 * A-MPDU depends upon vap/node config.
181 * A-MSDU depends upon vap/node config.
182 * FF depends upon vap config, IE and whether
183 * it's 11abg (and not 11n/11ac/etc.)
184 *
185 * Note that these flags indiciate whether we can do
186 * it at all, rather than the situation (eg traffic type.)
187 */
188 do_ampdu = ((ni->ni_flags & IEEE80211_NODE_AMPDU_TX) &&
189 (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_TX));
190 do_amsdu = ((ni->ni_flags & IEEE80211_NODE_AMSDU_TX) &&
191 (vap->iv_flags_ht & IEEE80211_FHT_AMSDU_TX));
192 do_ff =
193 ((ni->ni_flags & IEEE80211_NODE_HT) == 0) &&
194 ((ni->ni_flags & IEEE80211_NODE_VHT) == 0) &&
195 (IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF));
196
197 /*
198 * Check if A-MPDU tx aggregation is setup or if we
199 * should try to enable it. The sta must be associated
200 * with HT and A-MPDU enabled for use. When the policy
201 * routine decides we should enable A-MPDU we issue an
202 * ADDBA request and wait for a reply. The frame being
203 * encapsulated will go out w/o using A-MPDU, or possibly
204 * it might be collected by the driver and held/retransmit.
205 * The default ic_ampdu_enable routine handles staggering
206 * ADDBA requests in case the receiver NAK's us or we are
207 * otherwise unable to establish a BA stream.
208 *
209 * Don't treat group-addressed frames as candidates for aggregation;
210 * net80211 doesn't support 802.11aa-2012 and so group addressed
211 * frames will always have sequence numbers allocated from the NON_QOS
212 * TID.
213 */
214 if (do_ampdu) {
215 if ((m->m_flags & M_EAPOL) == 0 && (! mcast)) {
216 int tid = WME_AC_TO_TID(M_WME_GETAC(m));
217 struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[tid];
218
219 ieee80211_txampdu_count_packet(tap);
220 if (IEEE80211_AMPDU_RUNNING(tap)) {
221 /*
222 * Operational, mark frame for aggregation.
223 *
224 * XXX do tx aggregation here
225 */
226 m->m_flags |= M_AMPDU_MPDU;
227 } else if (!IEEE80211_AMPDU_REQUESTED(tap) &&
228 ic->ic_ampdu_enable(ni, tap)) {
229 /*
230 * Not negotiated yet, request service.
231 */
232 ieee80211_ampdu_request(ni, tap);
233 /* XXX hold frame for reply? */
234 }
235 /*
236 * Now update the no-ampdu flag. A-MPDU may have been
237 * started or administratively disabled above; so now we
238 * know whether we're running yet or not.
239 *
240 * This will let us know whether we should be doing A-MSDU
241 * at this point. We only do A-MSDU if we're either not
242 * doing A-MPDU, or A-MPDU is NACKed, or A-MPDU + A-MSDU
243 * is available.
244 *
245 * Whilst here, update the amsdu-ampdu flag. The above may
246 * have also set or cleared the amsdu-in-ampdu txa_flags
247 * combination so we can correctly do A-MPDU + A-MSDU.
248 */
249 no_ampdu = (! IEEE80211_AMPDU_RUNNING(tap)
250 || (IEEE80211_AMPDU_NACKED(tap)));
251 do_ampdu_amsdu = IEEE80211_AMPDU_RUNNING_AMSDU(tap);
252 }
253 }
254
255 #ifdef IEEE80211_SUPPORT_SUPERG
256 /*
257 * Check for AMSDU/FF; queue for aggregation
258 *
259 * Note: we don't bother trying to do fast frames or
260 * A-MSDU encapsulation for 802.3 drivers. Now, we
261 * likely could do it for FF (because it's a magic
262 * atheros tunnel LLC type) but I don't think we're going
263 * to really need to. For A-MSDU we'd have to set the
264 * A-MSDU QoS bit in the wifi header, so we just plain
265 * can't do it.
266 */
267 if (__predict_true((vap->iv_caps & IEEE80211_C_8023ENCAP) == 0)) {
268 if ((! mcast) &&
269 (do_ampdu_amsdu || (no_ampdu && do_amsdu)) &&
270 ieee80211_amsdu_tx_ok(ni)) {
271 m = ieee80211_amsdu_check(ni, m);
272 if (m == NULL) {
273 /* NB: any ni ref held on stageq */
274 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
275 "%s: amsdu_check queued frame\n",
276 __func__);
277 return (0);
278 }
279 } else if ((! mcast) && do_ff) {
280 m = ieee80211_ff_check(ni, m);
281 if (m == NULL) {
282 /* NB: any ni ref held on stageq */
283 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
284 "%s: ff_check queued frame\n",
285 __func__);
286 return (0);
287 }
288 }
289 }
290 #endif /* IEEE80211_SUPPORT_SUPERG */
291
292 /*
293 * Grab the TX lock - serialise the TX process from this
294 * point (where TX state is being checked/modified)
295 * through to driver queue.
296 */
297 IEEE80211_TX_LOCK(ic);
298
299 /*
300 * XXX make the encap and transmit code a separate function
301 * so things like the FF (and later A-MSDU) path can just call
302 * it for flushed frames.
303 */
304 if (__predict_true((vap->iv_caps & IEEE80211_C_8023ENCAP) == 0)) {
305 /*
306 * Encapsulate the packet in prep for transmission.
307 */
308 m = ieee80211_encap(vap, ni, m);
309 if (m == NULL) {
310 /* NB: stat+msg handled in ieee80211_encap */
311 IEEE80211_TX_UNLOCK(ic);
312 ieee80211_free_node(ni);
313 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
314 return (ENOBUFS);
315 }
316 }
317 (void) ieee80211_parent_xmitpkt(ic, m);
318
319 /*
320 * Unlock at this point - no need to hold it across
321 * ieee80211_free_node() (ie, the comlock)
322 */
323 IEEE80211_TX_UNLOCK(ic);
324 ic->ic_lastdata = ticks;
325
326 return (0);
327 }
328
329
330
331 /*
332 * Send the given mbuf through the given vap.
333 *
334 * This consumes the mbuf regardless of whether the transmit
335 * was successful or not.
336 *
337 * This does none of the initial checks that ieee80211_start()
338 * does (eg CAC timeout, interface wakeup) - the caller must
339 * do this first.
340 */
341 static int
342 ieee80211_start_pkt(struct ieee80211vap *vap, struct mbuf *m)
343 {
344 #define IS_DWDS(vap) \
345 (vap->iv_opmode == IEEE80211_M_WDS && \
346 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) == 0)
347 struct ieee80211com *ic = vap->iv_ic;
348 struct ifnet *ifp = vap->iv_ifp;
349 struct ieee80211_node *ni;
350 struct ether_header *eh;
351
352 /*
353 * Cancel any background scan.
354 */
355 if (ic->ic_flags & IEEE80211_F_SCAN)
356 ieee80211_cancel_anyscan(vap);
357 /*
358 * Find the node for the destination so we can do
359 * things like power save and fast frames aggregation.
360 *
361 * NB: past this point various code assumes the first
362 * mbuf has the 802.3 header present (and contiguous).
363 */
364 ni = NULL;
365 if (m->m_len < sizeof(struct ether_header) &&
366 (m = m_pullup(m, sizeof(struct ether_header))) == NULL) {
367 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
368 "discard frame, %s\n", "m_pullup failed");
369 vap->iv_stats.is_tx_nobuf++; /* XXX */
370 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
371 return (ENOBUFS);
372 }
373 eh = mtod(m, struct ether_header *);
374 if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
375 if (IS_DWDS(vap)) {
376 /*
377 * Only unicast frames from the above go out
378 * DWDS vaps; multicast frames are handled by
379 * dispatching the frame as it comes through
380 * the AP vap (see below).
381 */
382 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_WDS,
383 eh->ether_dhost, "mcast", "%s", "on DWDS");
384 vap->iv_stats.is_dwds_mcast++;
385 m_freem(m);
386 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
387 /* XXX better status? */
388 return (ENOBUFS);
389 }
390 if (vap->iv_opmode == IEEE80211_M_HOSTAP) {
391 /*
392 * Spam DWDS vap's w/ multicast traffic.
393 */
394 /* XXX only if dwds in use? */
395 ieee80211_dwds_mcast(vap, m);
396 }
397 }
398 #ifdef IEEE80211_SUPPORT_MESH
399 if (vap->iv_opmode != IEEE80211_M_MBSS) {
400 #endif
401 ni = ieee80211_find_txnode(vap, eh->ether_dhost);
402 if (ni == NULL) {
403 /* NB: ieee80211_find_txnode does stat+msg */
404 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
405 m_freem(m);
406 /* XXX better status? */
407 return (ENOBUFS);
408 }
409 if (ni->ni_associd == 0 &&
410 (ni->ni_flags & IEEE80211_NODE_ASSOCID)) {
411 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT,
412 eh->ether_dhost, NULL,
413 "sta not associated (type 0x%04x)",
414 htons(eh->ether_type));
415 vap->iv_stats.is_tx_notassoc++;
416 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
417 m_freem(m);
418 ieee80211_free_node(ni);
419 /* XXX better status? */
420 return (ENOBUFS);
421 }
422 #ifdef IEEE80211_SUPPORT_MESH
423 } else {
424 if (!IEEE80211_ADDR_EQ(eh->ether_shost, vap->iv_myaddr)) {
425 /*
426 * Proxy station only if configured.
427 */
428 if (!ieee80211_mesh_isproxyena(vap)) {
429 IEEE80211_DISCARD_MAC(vap,
430 IEEE80211_MSG_OUTPUT |
431 IEEE80211_MSG_MESH,
432 eh->ether_dhost, NULL,
433 "%s", "proxy not enabled");
434 vap->iv_stats.is_mesh_notproxy++;
435 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
436 m_freem(m);
437 /* XXX better status? */
438 return (ENOBUFS);
439 }
440 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
441 "forward frame from DS SA(%6D), DA(%6D)\n",
442 eh->ether_shost, ":",
443 eh->ether_dhost, ":");
444 ieee80211_mesh_proxy_check(vap, eh->ether_shost);
445 }
446 ni = ieee80211_mesh_discover(vap, eh->ether_dhost, m);
447 if (ni == NULL) {
448 /*
449 * NB: ieee80211_mesh_discover holds/disposes
450 * frame (e.g. queueing on path discovery).
451 */
452 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
453 /* XXX better status? */
454 return (ENOBUFS);
455 }
456 }
457 #endif
458
459 /*
460 * We've resolved the sender, so attempt to transmit it.
461 */
462
463 if (vap->iv_state == IEEE80211_S_SLEEP) {
464 /*
465 * In power save; queue frame and then wakeup device
466 * for transmit.
467 */
468 ic->ic_lastdata = ticks;
469 if (ieee80211_pwrsave(ni, m) != 0)
470 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
471 ieee80211_free_node(ni);
472 ieee80211_new_state(vap, IEEE80211_S_RUN, 0);
473 return (0);
474 }
475
476 if (ieee80211_vap_pkt_send_dest(vap, m, ni) != 0)
477 return (ENOBUFS);
478 return (0);
479 #undef IS_DWDS
480 }
481
482 /*
483 * Start method for vap's. All packets from the stack come
484 * through here. We handle common processing of the packets
485 * before dispatching them to the underlying device.
486 *
487 * if_transmit() requires that the mbuf be consumed by this call
488 * regardless of the return condition.
489 */
490 int
491 ieee80211_vap_transmit(struct ifnet *ifp, struct mbuf *m)
492 {
493 struct ieee80211vap *vap = ifp->if_softc;
494 struct ieee80211com *ic = vap->iv_ic;
495
496 /*
497 * No data frames go out unless we're running.
498 * Note in particular this covers CAC and CSA
499 * states (though maybe we should check muting
500 * for CSA).
501 */
502 if (vap->iv_state != IEEE80211_S_RUN &&
503 vap->iv_state != IEEE80211_S_SLEEP) {
504 IEEE80211_LOCK(ic);
505 /* re-check under the com lock to avoid races */
506 if (vap->iv_state != IEEE80211_S_RUN &&
507 vap->iv_state != IEEE80211_S_SLEEP) {
508 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
509 "%s: ignore queue, in %s state\n",
510 __func__, ieee80211_state_name[vap->iv_state]);
511 vap->iv_stats.is_tx_badstate++;
512 IEEE80211_UNLOCK(ic);
513 ifp->if_drv_flags |= IFF_DRV_OACTIVE;
514 m_freem(m);
515 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
516 return (ENETDOWN);
517 }
518 IEEE80211_UNLOCK(ic);
519 }
520
521 /*
522 * Sanitize mbuf flags for net80211 use. We cannot
523 * clear M_PWR_SAV or M_MORE_DATA because these may
524 * be set for frames that are re-submitted from the
525 * power save queue.
526 *
527 * NB: This must be done before ieee80211_classify as
528 * it marks EAPOL in frames with M_EAPOL.
529 */
530 m->m_flags &= ~(M_80211_TX - M_PWR_SAV - M_MORE_DATA);
531
532 /*
533 * Bump to the packet transmission path.
534 * The mbuf will be consumed here.
535 */
536 return (ieee80211_start_pkt(vap, m));
537 }
538
539 void
540 ieee80211_vap_qflush(struct ifnet *ifp)
541 {
542
543 /* Empty for now */
544 }
545
546 /*
547 * 802.11 raw output routine.
548 *
549 * XXX TODO: this (and other send routines) should correctly
550 * XXX keep the pwr mgmt bit set if it decides to call into the
551 * XXX driver to send a frame whilst the state is SLEEP.
552 *
553 * Otherwise the peer may decide that we're awake and flood us
554 * with traffic we are still too asleep to receive!
555 */
556 int
557 ieee80211_raw_output(struct ieee80211vap *vap, struct ieee80211_node *ni,
558 struct mbuf *m, const struct ieee80211_bpf_params *params)
559 {
560 struct ieee80211com *ic = vap->iv_ic;
561 int error;
562
563 /*
564 * Set node - the caller has taken a reference, so ensure
565 * that the mbuf has the same node value that
566 * it would if it were going via the normal path.
567 */
568 m->m_pkthdr.rcvif = (void *)ni;
569
570 /*
571 * Attempt to add bpf transmit parameters.
572 *
573 * For now it's ok to fail; the raw_xmit api still takes
574 * them as an option.
575 *
576 * Later on when ic_raw_xmit() has params removed,
577 * they'll have to be added - so fail the transmit if
578 * they can't be.
579 */
580 if (params)
581 (void) ieee80211_add_xmit_params(m, params);
582
583 error = ic->ic_raw_xmit(ni, m, params);
584 if (error) {
585 if_inc_counter(vap->iv_ifp, IFCOUNTER_OERRORS, 1);
586 ieee80211_free_node(ni);
587 }
588 return (error);
589 }
590
591 static int
592 ieee80211_validate_frame(struct mbuf *m,
593 const struct ieee80211_bpf_params *params)
594 {
595 struct ieee80211_frame *wh;
596 int type;
597
598 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_ack))
599 return (EINVAL);
600
601 wh = mtod(m, struct ieee80211_frame *);
602 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
603 IEEE80211_FC0_VERSION_0)
604 return (EINVAL);
605
606 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
607 if (type != IEEE80211_FC0_TYPE_DATA) {
608 if ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) !=
609 IEEE80211_FC1_DIR_NODS)
610 return (EINVAL);
611
612 if (type != IEEE80211_FC0_TYPE_MGT &&
613 (wh->i_fc[1] & IEEE80211_FC1_MORE_FRAG) != 0)
614 return (EINVAL);
615
616 /* XXX skip other field checks? */
617 }
618
619 if ((params && (params->ibp_flags & IEEE80211_BPF_CRYPTO) != 0) ||
620 (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) != 0) {
621 int subtype;
622
623 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
624
625 /*
626 * See IEEE Std 802.11-2012,
627 * 8.2.4.1.9 'Protected Frame field'
628 */
629 /* XXX no support for robust management frames yet. */
630 if (!(type == IEEE80211_FC0_TYPE_DATA ||
631 (type == IEEE80211_FC0_TYPE_MGT &&
632 subtype == IEEE80211_FC0_SUBTYPE_AUTH)))
633 return (EINVAL);
634
635 wh->i_fc[1] |= IEEE80211_FC1_PROTECTED;
636 }
637
638 if (m->m_pkthdr.len < ieee80211_anyhdrsize(wh))
639 return (EINVAL);
640
641 return (0);
642 }
643
644 static int
645 ieee80211_validate_rate(struct ieee80211_node *ni, uint8_t rate)
646 {
647 struct ieee80211com *ic = ni->ni_ic;
648
649 if (IEEE80211_IS_HT_RATE(rate)) {
650 if ((ic->ic_htcaps & IEEE80211_HTC_HT) == 0)
651 return (EINVAL);
652
653 rate = IEEE80211_RV(rate);
654 if (rate <= 31) {
655 if (rate > ic->ic_txstream * 8 - 1)
656 return (EINVAL);
657
658 return (0);
659 }
660
661 if (rate == 32) {
662 if ((ic->ic_htcaps & IEEE80211_HTC_TXMCS32) == 0)
663 return (EINVAL);
664
665 return (0);
666 }
667
668 if ((ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) == 0)
669 return (EINVAL);
670
671 switch (ic->ic_txstream) {
672 case 0:
673 case 1:
674 return (EINVAL);
675 case 2:
676 if (rate > 38)
677 return (EINVAL);
678
679 return (0);
680 case 3:
681 if (rate > 52)
682 return (EINVAL);
683
684 return (0);
685 case 4:
686 default:
687 if (rate > 76)
688 return (EINVAL);
689
690 return (0);
691 }
692 }
693
694 if (!ieee80211_isratevalid(ic->ic_rt, rate))
695 return (EINVAL);
696
697 return (0);
698 }
699
700 static int
701 ieee80211_sanitize_rates(struct ieee80211_node *ni, struct mbuf *m,
702 const struct ieee80211_bpf_params *params)
703 {
704 int error;
705
706 if (!params)
707 return (0); /* nothing to do */
708
709 /* NB: most drivers assume that ibp_rate0 is set (!= 0). */
710 if (params->ibp_rate0 != 0) {
711 error = ieee80211_validate_rate(ni, params->ibp_rate0);
712 if (error != 0)
713 return (error);
714 } else {
715 /* XXX pre-setup some default (e.g., mgmt / mcast) rate */
716 /* XXX __DECONST? */
717 (void) m;
718 }
719
720 if (params->ibp_rate1 != 0 &&
721 (error = ieee80211_validate_rate(ni, params->ibp_rate1)) != 0)
722 return (error);
723
724 if (params->ibp_rate2 != 0 &&
725 (error = ieee80211_validate_rate(ni, params->ibp_rate2)) != 0)
726 return (error);
727
728 if (params->ibp_rate3 != 0 &&
729 (error = ieee80211_validate_rate(ni, params->ibp_rate3)) != 0)
730 return (error);
731
732 return (0);
733 }
734
735 /*
736 * 802.11 output routine. This is (currently) used only to
737 * connect bpf write calls to the 802.11 layer for injecting
738 * raw 802.11 frames.
739 */
740 int
741 ieee80211_output(struct ifnet *ifp, struct mbuf *m,
742 const struct sockaddr *dst, struct route *ro)
743 {
744 #define senderr(e) do { error = (e); goto bad;} while (0)
745 const struct ieee80211_bpf_params *params = NULL;
746 struct ieee80211_node *ni = NULL;
747 struct ieee80211vap *vap;
748 struct ieee80211_frame *wh;
749 struct ieee80211com *ic = NULL;
750 int error;
751 int ret;
752
753 if (ifp->if_drv_flags & IFF_DRV_OACTIVE) {
754 /*
755 * Short-circuit requests if the vap is marked OACTIVE
756 * as this can happen because a packet came down through
757 * ieee80211_start before the vap entered RUN state in
758 * which case it's ok to just drop the frame. This
759 * should not be necessary but callers of if_output don't
760 * check OACTIVE.
761 */
762 senderr(ENETDOWN);
763 }
764 vap = ifp->if_softc;
765 ic = vap->iv_ic;
766 /*
767 * Hand to the 802.3 code if not tagged as
768 * a raw 802.11 frame.
769 */
770 if (dst->sa_family != AF_IEEE80211)
771 return vap->iv_output(ifp, m, dst, ro);
772 #ifdef MAC
773 error = mac_ifnet_check_transmit(ifp, m);
774 if (error)
775 senderr(error);
776 #endif
777 if (ifp->if_flags & IFF_MONITOR)
778 senderr(ENETDOWN);
779 if (!IFNET_IS_UP_RUNNING(ifp))
780 senderr(ENETDOWN);
781 if (vap->iv_state == IEEE80211_S_CAC) {
782 IEEE80211_DPRINTF(vap,
783 IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH,
784 "block %s frame in CAC state\n", "raw data");
785 vap->iv_stats.is_tx_badstate++;
786 senderr(EIO); /* XXX */
787 } else if (vap->iv_state == IEEE80211_S_SCAN)
788 senderr(EIO);
789 /* XXX bypass bridge, pfil, carp, etc. */
790
791 /*
792 * NB: DLT_IEEE802_11_RADIO identifies the parameters are
793 * present by setting the sa_len field of the sockaddr (yes,
794 * this is a hack).
795 * NB: we assume sa_data is suitably aligned to cast.
796 */
797 if (dst->sa_len != 0)
798 params = (const struct ieee80211_bpf_params *)dst->sa_data;
799
800 error = ieee80211_validate_frame(m, params);
801 if (error != 0)
802 senderr(error);
803
804 wh = mtod(m, struct ieee80211_frame *);
805
806 /* locate destination node */
807 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) {
808 case IEEE80211_FC1_DIR_NODS:
809 case IEEE80211_FC1_DIR_FROMDS:
810 ni = ieee80211_find_txnode(vap, wh->i_addr1);
811 break;
812 case IEEE80211_FC1_DIR_TODS:
813 case IEEE80211_FC1_DIR_DSTODS:
814 ni = ieee80211_find_txnode(vap, wh->i_addr3);
815 break;
816 default:
817 senderr(EDOOFUS);
818 }
819 if (ni == NULL) {
820 /*
821 * Permit packets w/ bpf params through regardless
822 * (see below about sa_len).
823 */
824 if (dst->sa_len == 0)
825 senderr(EHOSTUNREACH);
826 ni = ieee80211_ref_node(vap->iv_bss);
827 }
828
829 /*
830 * Sanitize mbuf for net80211 flags leaked from above.
831 *
832 * NB: This must be done before ieee80211_classify as
833 * it marks EAPOL in frames with M_EAPOL.
834 */
835 m->m_flags &= ~M_80211_TX;
836 m->m_flags |= M_ENCAP; /* mark encapsulated */
837
838 if (IEEE80211_IS_DATA(wh)) {
839 /* calculate priority so drivers can find the tx queue */
840 if (ieee80211_classify(ni, m))
841 senderr(EIO); /* XXX */
842
843 /* NB: ieee80211_encap does not include 802.11 header */
844 IEEE80211_NODE_STAT_ADD(ni, tx_bytes,
845 m->m_pkthdr.len - ieee80211_hdrsize(wh));
846 } else
847 M_WME_SETAC(m, WME_AC_BE);
848
849 error = ieee80211_sanitize_rates(ni, m, params);
850 if (error != 0)
851 senderr(error);
852
853 IEEE80211_NODE_STAT(ni, tx_data);
854 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
855 IEEE80211_NODE_STAT(ni, tx_mcast);
856 m->m_flags |= M_MCAST;
857 } else
858 IEEE80211_NODE_STAT(ni, tx_ucast);
859
860 IEEE80211_TX_LOCK(ic);
861 ret = ieee80211_raw_output(vap, ni, m, params);
862 IEEE80211_TX_UNLOCK(ic);
863 return (ret);
864 bad:
865 if (m != NULL)
866 m_freem(m);
867 if (ni != NULL)
868 ieee80211_free_node(ni);
869 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
870 return error;
871 #undef senderr
872 }
873
874 /*
875 * Set the direction field and address fields of an outgoing
876 * frame. Note this should be called early on in constructing
877 * a frame as it sets i_fc[1]; other bits can then be or'd in.
878 */
879 void
880 ieee80211_send_setup(
881 struct ieee80211_node *ni,
882 struct mbuf *m,
883 int type, int tid,
884 const uint8_t sa[IEEE80211_ADDR_LEN],
885 const uint8_t da[IEEE80211_ADDR_LEN],
886 const uint8_t bssid[IEEE80211_ADDR_LEN])
887 {
888 #define WH4(wh) ((struct ieee80211_frame_addr4 *)wh)
889 struct ieee80211vap *vap = ni->ni_vap;
890 struct ieee80211_tx_ampdu *tap;
891 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
892 ieee80211_seq seqno;
893
894 IEEE80211_TX_LOCK_ASSERT(ni->ni_ic);
895
896 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | type;
897 if ((type & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_DATA) {
898 switch (vap->iv_opmode) {
899 case IEEE80211_M_STA:
900 wh->i_fc[1] = IEEE80211_FC1_DIR_TODS;
901 IEEE80211_ADDR_COPY(wh->i_addr1, bssid);
902 IEEE80211_ADDR_COPY(wh->i_addr2, sa);
903 IEEE80211_ADDR_COPY(wh->i_addr3, da);
904 break;
905 case IEEE80211_M_IBSS:
906 case IEEE80211_M_AHDEMO:
907 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
908 IEEE80211_ADDR_COPY(wh->i_addr1, da);
909 IEEE80211_ADDR_COPY(wh->i_addr2, sa);
910 IEEE80211_ADDR_COPY(wh->i_addr3, bssid);
911 break;
912 case IEEE80211_M_HOSTAP:
913 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
914 IEEE80211_ADDR_COPY(wh->i_addr1, da);
915 IEEE80211_ADDR_COPY(wh->i_addr2, bssid);
916 IEEE80211_ADDR_COPY(wh->i_addr3, sa);
917 break;
918 case IEEE80211_M_WDS:
919 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS;
920 IEEE80211_ADDR_COPY(wh->i_addr1, da);
921 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
922 IEEE80211_ADDR_COPY(wh->i_addr3, da);
923 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa);
924 break;
925 case IEEE80211_M_MBSS:
926 #ifdef IEEE80211_SUPPORT_MESH
927 if (IEEE80211_IS_MULTICAST(da)) {
928 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
929 /* XXX next hop */
930 IEEE80211_ADDR_COPY(wh->i_addr1, da);
931 IEEE80211_ADDR_COPY(wh->i_addr2,
932 vap->iv_myaddr);
933 } else {
934 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS;
935 IEEE80211_ADDR_COPY(wh->i_addr1, da);
936 IEEE80211_ADDR_COPY(wh->i_addr2,
937 vap->iv_myaddr);
938 IEEE80211_ADDR_COPY(wh->i_addr3, da);
939 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, sa);
940 }
941 #endif
942 break;
943 case IEEE80211_M_MONITOR: /* NB: to quiet compiler */
944 break;
945 }
946 } else {
947 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
948 IEEE80211_ADDR_COPY(wh->i_addr1, da);
949 IEEE80211_ADDR_COPY(wh->i_addr2, sa);
950 #ifdef IEEE80211_SUPPORT_MESH
951 if (vap->iv_opmode == IEEE80211_M_MBSS)
952 IEEE80211_ADDR_COPY(wh->i_addr3, sa);
953 else
954 #endif
955 IEEE80211_ADDR_COPY(wh->i_addr3, bssid);
956 }
957 *(uint16_t *)&wh->i_dur[0] = 0;
958
959 /*
960 * XXX TODO: this is what the TX lock is for.
961 * Here we're incrementing sequence numbers, and they
962 * need to be in lock-step with what the driver is doing
963 * both in TX ordering and crypto encap (IV increment.)
964 *
965 * If the driver does seqno itself, then we can skip
966 * assigning sequence numbers here, and we can avoid
967 * requiring the TX lock.
968 */
969 tap = &ni->ni_tx_ampdu[tid];
970 if (tid != IEEE80211_NONQOS_TID && IEEE80211_AMPDU_RUNNING(tap)) {
971 m->m_flags |= M_AMPDU_MPDU;
972
973 /* NB: zero out i_seq field (for s/w encryption etc) */
974 *(uint16_t *)&wh->i_seq[0] = 0;
975 } else {
976 if (IEEE80211_HAS_SEQ(type & IEEE80211_FC0_TYPE_MASK,
977 type & IEEE80211_FC0_SUBTYPE_MASK))
978 /*
979 * 802.11-2012 9.3.2.10 - QoS multicast frames
980 * come out of a different seqno space.
981 */
982 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
983 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++;
984 } else {
985 seqno = ni->ni_txseqs[tid]++;
986 }
987 else
988 seqno = 0;
989
990 *(uint16_t *)&wh->i_seq[0] =
991 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
992 M_SEQNO_SET(m, seqno);
993 }
994
995 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
996 m->m_flags |= M_MCAST;
997 #undef WH4
998 }
999
1000 /*
1001 * Send a management frame to the specified node. The node pointer
1002 * must have a reference as the pointer will be passed to the driver
1003 * and potentially held for a long time. If the frame is successfully
1004 * dispatched to the driver, then it is responsible for freeing the
1005 * reference (and potentially free'ing up any associated storage);
1006 * otherwise deal with reclaiming any reference (on error).
1007 */
1008 int
1009 ieee80211_mgmt_output(struct ieee80211_node *ni, struct mbuf *m, int type,
1010 struct ieee80211_bpf_params *params)
1011 {
1012 struct ieee80211vap *vap = ni->ni_vap;
1013 struct ieee80211com *ic = ni->ni_ic;
1014 struct ieee80211_frame *wh;
1015 int ret;
1016
1017 KASSERT(ni != NULL, ("null node"));
1018
1019 if (vap->iv_state == IEEE80211_S_CAC) {
1020 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH,
1021 ni, "block %s frame in CAC state",
1022 ieee80211_mgt_subtype_name(type));
1023 vap->iv_stats.is_tx_badstate++;
1024 ieee80211_free_node(ni);
1025 m_freem(m);
1026 return EIO; /* XXX */
1027 }
1028
1029 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT);
1030 if (m == NULL) {
1031 ieee80211_free_node(ni);
1032 return ENOMEM;
1033 }
1034
1035 IEEE80211_TX_LOCK(ic);
1036
1037 wh = mtod(m, struct ieee80211_frame *);
1038 ieee80211_send_setup(ni, m,
1039 IEEE80211_FC0_TYPE_MGT | type, IEEE80211_NONQOS_TID,
1040 vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid);
1041 if (params->ibp_flags & IEEE80211_BPF_CRYPTO) {
1042 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr1,
1043 "encrypting frame (%s)", __func__);
1044 wh->i_fc[1] |= IEEE80211_FC1_PROTECTED;
1045 }
1046 m->m_flags |= M_ENCAP; /* mark encapsulated */
1047
1048 KASSERT(type != IEEE80211_FC0_SUBTYPE_PROBE_RESP, ("probe response?"));
1049 M_WME_SETAC(m, params->ibp_pri);
1050
1051 #ifdef IEEE80211_DEBUG
1052 /* avoid printing too many frames */
1053 if ((ieee80211_msg_debug(vap) && doprint(vap, type)) ||
1054 ieee80211_msg_dumppkts(vap)) {
1055 printf("[%s] send %s on channel %u\n",
1056 ether_sprintf(wh->i_addr1),
1057 ieee80211_mgt_subtype_name(type),
1058 ieee80211_chan2ieee(ic, ic->ic_curchan));
1059 }
1060 #endif
1061 IEEE80211_NODE_STAT(ni, tx_mgmt);
1062
1063 ret = ieee80211_raw_output(vap, ni, m, params);
1064 IEEE80211_TX_UNLOCK(ic);
1065 return (ret);
1066 }
1067
1068 static void
1069 ieee80211_nulldata_transmitted(struct ieee80211_node *ni, void *arg,
1070 int status)
1071 {
1072 struct ieee80211vap *vap = ni->ni_vap;
1073
1074 wakeup(vap);
1075 }
1076
1077 /*
1078 * Send a null data frame to the specified node. If the station
1079 * is setup for QoS then a QoS Null Data frame is constructed.
1080 * If this is a WDS station then a 4-address frame is constructed.
1081 *
1082 * NB: the caller is assumed to have setup a node reference
1083 * for use; this is necessary to deal with a race condition
1084 * when probing for inactive stations. Like ieee80211_mgmt_output
1085 * we must cleanup any node reference on error; however we
1086 * can safely just unref it as we know it will never be the
1087 * last reference to the node.
1088 */
1089 int
1090 ieee80211_send_nulldata(struct ieee80211_node *ni)
1091 {
1092 struct ieee80211vap *vap = ni->ni_vap;
1093 struct ieee80211com *ic = ni->ni_ic;
1094 struct mbuf *m;
1095 struct ieee80211_frame *wh;
1096 int hdrlen;
1097 uint8_t *frm;
1098 int ret;
1099
1100 if (vap->iv_state == IEEE80211_S_CAC) {
1101 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT | IEEE80211_MSG_DOTH,
1102 ni, "block %s frame in CAC state", "null data");
1103 ieee80211_unref_node(&ni);
1104 vap->iv_stats.is_tx_badstate++;
1105 return EIO; /* XXX */
1106 }
1107
1108 if (ni->ni_flags & (IEEE80211_NODE_QOS|IEEE80211_NODE_HT))
1109 hdrlen = sizeof(struct ieee80211_qosframe);
1110 else
1111 hdrlen = sizeof(struct ieee80211_frame);
1112 /* NB: only WDS vap's get 4-address frames */
1113 if (vap->iv_opmode == IEEE80211_M_WDS)
1114 hdrlen += IEEE80211_ADDR_LEN;
1115 if (ic->ic_flags & IEEE80211_F_DATAPAD)
1116 hdrlen = roundup(hdrlen, sizeof(uint32_t));
1117
1118 m = ieee80211_getmgtframe(&frm, ic->ic_headroom + hdrlen, 0);
1119 if (m == NULL) {
1120 /* XXX debug msg */
1121 ieee80211_unref_node(&ni);
1122 vap->iv_stats.is_tx_nobuf++;
1123 return ENOMEM;
1124 }
1125 KASSERT(M_LEADINGSPACE(m) >= hdrlen,
1126 ("leading space %zd", M_LEADINGSPACE(m)));
1127 M_PREPEND(m, hdrlen, M_NOWAIT);
1128 if (m == NULL) {
1129 /* NB: cannot happen */
1130 ieee80211_free_node(ni);
1131 return ENOMEM;
1132 }
1133
1134 IEEE80211_TX_LOCK(ic);
1135
1136 wh = mtod(m, struct ieee80211_frame *); /* NB: a little lie */
1137 if (ni->ni_flags & IEEE80211_NODE_QOS) {
1138 const int tid = WME_AC_TO_TID(WME_AC_BE);
1139 uint8_t *qos;
1140
1141 ieee80211_send_setup(ni, m,
1142 IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_QOS_NULL,
1143 tid, vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid);
1144
1145 if (vap->iv_opmode == IEEE80211_M_WDS)
1146 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos;
1147 else
1148 qos = ((struct ieee80211_qosframe *) wh)->i_qos;
1149 qos[0] = tid & IEEE80211_QOS_TID;
1150 if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[WME_AC_BE].wmep_noackPolicy)
1151 qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK;
1152 qos[1] = 0;
1153 } else {
1154 ieee80211_send_setup(ni, m,
1155 IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_NODATA,
1156 IEEE80211_NONQOS_TID,
1157 vap->iv_myaddr, ni->ni_macaddr, ni->ni_bssid);
1158 }
1159 if (vap->iv_opmode != IEEE80211_M_WDS) {
1160 /* NB: power management bit is never sent by an AP */
1161 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) &&
1162 vap->iv_opmode != IEEE80211_M_HOSTAP)
1163 wh->i_fc[1] |= IEEE80211_FC1_PWR_MGT;
1164 }
1165 if ((ic->ic_flags & IEEE80211_F_SCAN) &&
1166 (ni->ni_flags & IEEE80211_NODE_PWR_MGT)) {
1167 ieee80211_add_callback(m, ieee80211_nulldata_transmitted,
1168 NULL);
1169 }
1170 m->m_len = m->m_pkthdr.len = hdrlen;
1171 m->m_flags |= M_ENCAP; /* mark encapsulated */
1172
1173 M_WME_SETAC(m, WME_AC_BE);
1174
1175 IEEE80211_NODE_STAT(ni, tx_data);
1176
1177 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, ni,
1178 "send %snull data frame on channel %u, pwr mgt %s",
1179 ni->ni_flags & IEEE80211_NODE_QOS ? "QoS " : "",
1180 ieee80211_chan2ieee(ic, ic->ic_curchan),
1181 wh->i_fc[1] & IEEE80211_FC1_PWR_MGT ? "ena" : "dis");
1182
1183 ret = ieee80211_raw_output(vap, ni, m, NULL);
1184 IEEE80211_TX_UNLOCK(ic);
1185 return (ret);
1186 }
1187
1188 /*
1189 * Assign priority to a frame based on any vlan tag assigned
1190 * to the station and/or any Diffserv setting in an IP header.
1191 * Finally, if an ACM policy is setup (in station mode) it's
1192 * applied.
1193 */
1194 int
1195 ieee80211_classify(struct ieee80211_node *ni, struct mbuf *m)
1196 {
1197 const struct ether_header *eh = NULL;
1198 uint16_t ether_type;
1199 int v_wme_ac, d_wme_ac, ac;
1200
1201 if (__predict_false(m->m_flags & M_ENCAP)) {
1202 struct ieee80211_frame *wh = mtod(m, struct ieee80211_frame *);
1203 struct llc *llc;
1204 int hdrlen, subtype;
1205
1206 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1207 if (subtype & IEEE80211_FC0_SUBTYPE_NODATA) {
1208 ac = WME_AC_BE;
1209 goto done;
1210 }
1211
1212 hdrlen = ieee80211_hdrsize(wh);
1213 if (m->m_pkthdr.len < hdrlen + sizeof(*llc))
1214 return 1;
1215
1216 llc = (struct llc *)mtodo(m, hdrlen);
1217 if (llc->llc_dsap != LLC_SNAP_LSAP ||
1218 llc->llc_ssap != LLC_SNAP_LSAP ||
1219 llc->llc_control != LLC_UI ||
1220 llc->llc_snap.org_code[0] != 0 ||
1221 llc->llc_snap.org_code[1] != 0 ||
1222 llc->llc_snap.org_code[2] != 0)
1223 return 1;
1224
1225 ether_type = llc->llc_snap.ether_type;
1226 } else {
1227 eh = mtod(m, struct ether_header *);
1228 ether_type = eh->ether_type;
1229 }
1230
1231 /*
1232 * Always promote PAE/EAPOL frames to high priority.
1233 */
1234 if (ether_type == htons(ETHERTYPE_PAE)) {
1235 /* NB: mark so others don't need to check header */
1236 m->m_flags |= M_EAPOL;
1237 ac = WME_AC_VO;
1238 goto done;
1239 }
1240 /*
1241 * Non-qos traffic goes to BE.
1242 */
1243 if ((ni->ni_flags & IEEE80211_NODE_QOS) == 0) {
1244 ac = WME_AC_BE;
1245 goto done;
1246 }
1247
1248 /*
1249 * If node has a vlan tag then all traffic
1250 * to it must have a matching tag.
1251 */
1252 v_wme_ac = 0;
1253 if (ni->ni_vlan != 0) {
1254 if ((m->m_flags & M_VLANTAG) == 0) {
1255 IEEE80211_NODE_STAT(ni, tx_novlantag);
1256 return 1;
1257 }
1258 if (EVL_VLANOFTAG(m->m_pkthdr.ether_vtag) !=
1259 EVL_VLANOFTAG(ni->ni_vlan)) {
1260 IEEE80211_NODE_STAT(ni, tx_vlanmismatch);
1261 return 1;
1262 }
1263 /* map vlan priority to AC */
1264 v_wme_ac = TID_TO_WME_AC(EVL_PRIOFTAG(ni->ni_vlan));
1265 }
1266
1267 /* XXX m_copydata may be too slow for fast path */
1268 #ifdef INET
1269 if (eh && eh->ether_type == htons(ETHERTYPE_IP)) {
1270 uint8_t tos;
1271 /*
1272 * IP frame, map the DSCP bits from the TOS field.
1273 */
1274 /* NB: ip header may not be in first mbuf */
1275 m_copydata(m, sizeof(struct ether_header) +
1276 offsetof(struct ip, ip_tos), sizeof(tos), &tos);
1277 tos >>= 5; /* NB: ECN + low 3 bits of DSCP */
1278 d_wme_ac = TID_TO_WME_AC(tos);
1279 } else {
1280 #endif /* INET */
1281 #ifdef INET6
1282 if (eh && eh->ether_type == htons(ETHERTYPE_IPV6)) {
1283 uint32_t flow;
1284 uint8_t tos;
1285 /*
1286 * IPv6 frame, map the DSCP bits from the traffic class field.
1287 */
1288 m_copydata(m, sizeof(struct ether_header) +
1289 offsetof(struct ip6_hdr, ip6_flow), sizeof(flow),
1290 (caddr_t) &flow);
1291 tos = (uint8_t)(ntohl(flow) >> 20);
1292 tos >>= 5; /* NB: ECN + low 3 bits of DSCP */
1293 d_wme_ac = TID_TO_WME_AC(tos);
1294 } else {
1295 #endif /* INET6 */
1296 d_wme_ac = WME_AC_BE;
1297 #ifdef INET6
1298 }
1299 #endif
1300 #ifdef INET
1301 }
1302 #endif
1303 /*
1304 * Use highest priority AC.
1305 */
1306 if (v_wme_ac > d_wme_ac)
1307 ac = v_wme_ac;
1308 else
1309 ac = d_wme_ac;
1310
1311 /*
1312 * Apply ACM policy.
1313 */
1314 if (ni->ni_vap->iv_opmode == IEEE80211_M_STA) {
1315 static const int acmap[4] = {
1316 WME_AC_BK, /* WME_AC_BE */
1317 WME_AC_BK, /* WME_AC_BK */
1318 WME_AC_BE, /* WME_AC_VI */
1319 WME_AC_VI, /* WME_AC_VO */
1320 };
1321 struct ieee80211com *ic = ni->ni_ic;
1322
1323 while (ac != WME_AC_BK &&
1324 ic->ic_wme.wme_wmeBssChanParams.cap_wmeParams[ac].wmep_acm)
1325 ac = acmap[ac];
1326 }
1327 done:
1328 M_WME_SETAC(m, ac);
1329 return 0;
1330 }
1331
1332 /*
1333 * Insure there is sufficient contiguous space to encapsulate the
1334 * 802.11 data frame. If room isn't already there, arrange for it.
1335 * Drivers and cipher modules assume we have done the necessary work
1336 * and fail rudely if they don't find the space they need.
1337 */
1338 struct mbuf *
1339 ieee80211_mbuf_adjust(struct ieee80211vap *vap, int hdrsize,
1340 struct ieee80211_key *key, struct mbuf *m)
1341 {
1342 #define TO_BE_RECLAIMED (sizeof(struct ether_header) - sizeof(struct llc))
1343 int needed_space = vap->iv_ic->ic_headroom + hdrsize;
1344
1345 if (key != NULL) {
1346 /* XXX belongs in crypto code? */
1347 needed_space += key->wk_cipher->ic_header;
1348 /* XXX frags */
1349 /*
1350 * When crypto is being done in the host we must insure
1351 * the data are writable for the cipher routines; clone
1352 * a writable mbuf chain.
1353 * XXX handle SWMIC specially
1354 */
1355 if (key->wk_flags & (IEEE80211_KEY_SWENCRYPT|IEEE80211_KEY_SWENMIC)) {
1356 m = m_unshare(m, M_NOWAIT);
1357 if (m == NULL) {
1358 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
1359 "%s: cannot get writable mbuf\n", __func__);
1360 vap->iv_stats.is_tx_nobuf++; /* XXX new stat */
1361 return NULL;
1362 }
1363 }
1364 }
1365 /*
1366 * We know we are called just before stripping an Ethernet
1367 * header and prepending an LLC header. This means we know
1368 * there will be
1369 * sizeof(struct ether_header) - sizeof(struct llc)
1370 * bytes recovered to which we need additional space for the
1371 * 802.11 header and any crypto header.
1372 */
1373 /* XXX check trailing space and copy instead? */
1374 if (M_LEADINGSPACE(m) < needed_space - TO_BE_RECLAIMED) {
1375 struct mbuf *n = m_gethdr(M_NOWAIT, m->m_type);
1376 if (n == NULL) {
1377 IEEE80211_DPRINTF(vap, IEEE80211_MSG_OUTPUT,
1378 "%s: cannot expand storage\n", __func__);
1379 vap->iv_stats.is_tx_nobuf++;
1380 m_freem(m);
1381 return NULL;
1382 }
1383 KASSERT(needed_space <= MHLEN,
1384 ("not enough room, need %u got %d\n", needed_space, MHLEN));
1385 /*
1386 * Setup new mbuf to have leading space to prepend the
1387 * 802.11 header and any crypto header bits that are
1388 * required (the latter are added when the driver calls
1389 * back to ieee80211_crypto_encap to do crypto encapsulation).
1390 */
1391 /* NB: must be first 'cuz it clobbers m_data */
1392 m_move_pkthdr(n, m);
1393 n->m_len = 0; /* NB: m_gethdr does not set */
1394 n->m_data += needed_space;
1395 /*
1396 * Pull up Ethernet header to create the expected layout.
1397 * We could use m_pullup but that's overkill (i.e. we don't
1398 * need the actual data) and it cannot fail so do it inline
1399 * for speed.
1400 */
1401 /* NB: struct ether_header is known to be contiguous */
1402 n->m_len += sizeof(struct ether_header);
1403 m->m_len -= sizeof(struct ether_header);
1404 m->m_data += sizeof(struct ether_header);
1405 /*
1406 * Replace the head of the chain.
1407 */
1408 n->m_next = m;
1409 m = n;
1410 }
1411 return m;
1412 #undef TO_BE_RECLAIMED
1413 }
1414
1415 /*
1416 * Return the transmit key to use in sending a unicast frame.
1417 * If a unicast key is set we use that. When no unicast key is set
1418 * we fall back to the default transmit key.
1419 */
1420 static __inline struct ieee80211_key *
1421 ieee80211_crypto_getucastkey(struct ieee80211vap *vap,
1422 struct ieee80211_node *ni)
1423 {
1424 if (IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)) {
1425 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE ||
1426 IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey]))
1427 return NULL;
1428 return &vap->iv_nw_keys[vap->iv_def_txkey];
1429 } else {
1430 return &ni->ni_ucastkey;
1431 }
1432 }
1433
1434 /*
1435 * Return the transmit key to use in sending a multicast frame.
1436 * Multicast traffic always uses the group key which is installed as
1437 * the default tx key.
1438 */
1439 static __inline struct ieee80211_key *
1440 ieee80211_crypto_getmcastkey(struct ieee80211vap *vap,
1441 struct ieee80211_node *ni)
1442 {
1443 if (vap->iv_def_txkey == IEEE80211_KEYIX_NONE ||
1444 IEEE80211_KEY_UNDEFINED(&vap->iv_nw_keys[vap->iv_def_txkey]))
1445 return NULL;
1446 return &vap->iv_nw_keys[vap->iv_def_txkey];
1447 }
1448
1449 /*
1450 * Encapsulate an outbound data frame. The mbuf chain is updated.
1451 * If an error is encountered NULL is returned. The caller is required
1452 * to provide a node reference and pullup the ethernet header in the
1453 * first mbuf.
1454 *
1455 * NB: Packet is assumed to be processed by ieee80211_classify which
1456 * marked EAPOL frames w/ M_EAPOL.
1457 */
1458 struct mbuf *
1459 ieee80211_encap(struct ieee80211vap *vap, struct ieee80211_node *ni,
1460 struct mbuf *m)
1461 {
1462 #define WH4(wh) ((struct ieee80211_frame_addr4 *)(wh))
1463 #define MC01(mc) ((struct ieee80211_meshcntl_ae01 *)mc)
1464 struct ieee80211com *ic = ni->ni_ic;
1465 #ifdef IEEE80211_SUPPORT_MESH
1466 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1467 struct ieee80211_meshcntl_ae10 *mc;
1468 struct ieee80211_mesh_route *rt = NULL;
1469 int dir = -1;
1470 #endif
1471 struct ether_header eh;
1472 struct ieee80211_frame *wh;
1473 struct ieee80211_key *key;
1474 struct llc *llc;
1475 int hdrsize, hdrspace, datalen, addqos, txfrag, is4addr, is_mcast;
1476 ieee80211_seq seqno;
1477 int meshhdrsize, meshae;
1478 uint8_t *qos;
1479 int is_amsdu = 0;
1480
1481 IEEE80211_TX_LOCK_ASSERT(ic);
1482
1483 is_mcast = !! (m->m_flags & (M_MCAST | M_BCAST));
1484
1485 /*
1486 * Copy existing Ethernet header to a safe place. The
1487 * rest of the code assumes it's ok to strip it when
1488 * reorganizing state for the final encapsulation.
1489 */
1490 KASSERT(m->m_len >= sizeof(eh), ("no ethernet header!"));
1491 ETHER_HEADER_COPY(&eh, mtod(m, caddr_t));
1492
1493 /*
1494 * Insure space for additional headers. First identify
1495 * transmit key to use in calculating any buffer adjustments
1496 * required. This is also used below to do privacy
1497 * encapsulation work. Then calculate the 802.11 header
1498 * size and any padding required by the driver.
1499 *
1500 * Note key may be NULL if we fall back to the default
1501 * transmit key and that is not set. In that case the
1502 * buffer may not be expanded as needed by the cipher
1503 * routines, but they will/should discard it.
1504 */
1505 if (vap->iv_flags & IEEE80211_F_PRIVACY) {
1506 if (vap->iv_opmode == IEEE80211_M_STA ||
1507 !IEEE80211_IS_MULTICAST(eh.ether_dhost) ||
1508 (vap->iv_opmode == IEEE80211_M_WDS &&
1509 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY))) {
1510 key = ieee80211_crypto_getucastkey(vap, ni);
1511 } else if ((vap->iv_opmode == IEEE80211_M_WDS) &&
1512 (! (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY))) {
1513 /*
1514 * Use ucastkey for DWDS transmit nodes, multicast
1515 * or otherwise.
1516 *
1517 * This is required to ensure that multicast frames
1518 * from a DWDS AP to a DWDS STA is encrypted with
1519 * a key that can actually work.
1520 *
1521 * There's no default key for multicast traffic
1522 * on a DWDS WDS VAP node (note NOT the DWDS enabled
1523 * AP VAP, the dynamically created per-STA WDS node)
1524 * so encap fails and transmit fails.
1525 */
1526 key = ieee80211_crypto_getucastkey(vap, ni);
1527 } else {
1528 key = ieee80211_crypto_getmcastkey(vap, ni);
1529 }
1530 if (key == NULL && (m->m_flags & M_EAPOL) == 0) {
1531 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_CRYPTO,
1532 eh.ether_dhost,
1533 "no default transmit key (%s) deftxkey %u",
1534 __func__, vap->iv_def_txkey);
1535 vap->iv_stats.is_tx_nodefkey++;
1536 goto bad;
1537 }
1538 } else
1539 key = NULL;
1540 /*
1541 * XXX Some ap's don't handle QoS-encapsulated EAPOL
1542 * frames so suppress use. This may be an issue if other
1543 * ap's require all data frames to be QoS-encapsulated
1544 * once negotiated in which case we'll need to make this
1545 * configurable.
1546 *
1547 * Don't send multicast QoS frames.
1548 * Technically multicast frames can be QoS if all stations in the
1549 * BSS are also QoS.
1550 *
1551 * NB: mesh data frames are QoS, including multicast frames.
1552 */
1553 addqos =
1554 (((is_mcast == 0) && (ni->ni_flags &
1555 (IEEE80211_NODE_QOS|IEEE80211_NODE_HT))) ||
1556 (vap->iv_opmode == IEEE80211_M_MBSS)) &&
1557 (m->m_flags & M_EAPOL) == 0;
1558
1559 if (addqos)
1560 hdrsize = sizeof(struct ieee80211_qosframe);
1561 else
1562 hdrsize = sizeof(struct ieee80211_frame);
1563 #ifdef IEEE80211_SUPPORT_MESH
1564 if (vap->iv_opmode == IEEE80211_M_MBSS) {
1565 /*
1566 * Mesh data frames are encapsulated according to the
1567 * rules of Section 11B.8.5 (p.139 of D3.0 spec).
1568 * o Group Addressed data (aka multicast) originating
1569 * at the local sta are sent w/ 3-address format and
1570 * address extension mode 00
1571 * o Individually Addressed data (aka unicast) originating
1572 * at the local sta are sent w/ 4-address format and
1573 * address extension mode 00
1574 * o Group Addressed data forwarded from a non-mesh sta are
1575 * sent w/ 3-address format and address extension mode 01
1576 * o Individually Address data from another sta are sent
1577 * w/ 4-address format and address extension mode 10
1578 */
1579 is4addr = 0; /* NB: don't use, disable */
1580 if (!IEEE80211_IS_MULTICAST(eh.ether_dhost)) {
1581 rt = ieee80211_mesh_rt_find(vap, eh.ether_dhost);
1582 KASSERT(rt != NULL, ("route is NULL"));
1583 dir = IEEE80211_FC1_DIR_DSTODS;
1584 hdrsize += IEEE80211_ADDR_LEN;
1585 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
1586 if (IEEE80211_ADDR_EQ(rt->rt_mesh_gate,
1587 vap->iv_myaddr)) {
1588 IEEE80211_NOTE_MAC(vap,
1589 IEEE80211_MSG_MESH,
1590 eh.ether_dhost,
1591 "%s", "trying to send to ourself");
1592 goto bad;
1593 }
1594 meshae = IEEE80211_MESH_AE_10;
1595 meshhdrsize =
1596 sizeof(struct ieee80211_meshcntl_ae10);
1597 } else {
1598 meshae = IEEE80211_MESH_AE_00;
1599 meshhdrsize =
1600 sizeof(struct ieee80211_meshcntl);
1601 }
1602 } else {
1603 dir = IEEE80211_FC1_DIR_FROMDS;
1604 if (!IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr)) {
1605 /* proxy group */
1606 meshae = IEEE80211_MESH_AE_01;
1607 meshhdrsize =
1608 sizeof(struct ieee80211_meshcntl_ae01);
1609 } else {
1610 /* group */
1611 meshae = IEEE80211_MESH_AE_00;
1612 meshhdrsize = sizeof(struct ieee80211_meshcntl);
1613 }
1614 }
1615 } else {
1616 #endif
1617 /*
1618 * 4-address frames need to be generated for:
1619 * o packets sent through a WDS vap (IEEE80211_M_WDS)
1620 * o packets sent through a vap marked for relaying
1621 * (e.g. a station operating with dynamic WDS)
1622 */
1623 is4addr = vap->iv_opmode == IEEE80211_M_WDS ||
1624 ((vap->iv_flags_ext & IEEE80211_FEXT_4ADDR) &&
1625 !IEEE80211_ADDR_EQ(eh.ether_shost, vap->iv_myaddr));
1626 if (is4addr)
1627 hdrsize += IEEE80211_ADDR_LEN;
1628 meshhdrsize = meshae = 0;
1629 #ifdef IEEE80211_SUPPORT_MESH
1630 }
1631 #endif
1632 /*
1633 * Honor driver DATAPAD requirement.
1634 */
1635 if (ic->ic_flags & IEEE80211_F_DATAPAD)
1636 hdrspace = roundup(hdrsize, sizeof(uint32_t));
1637 else
1638 hdrspace = hdrsize;
1639
1640 if (__predict_true((m->m_flags & M_FF) == 0)) {
1641 /*
1642 * Normal frame.
1643 */
1644 m = ieee80211_mbuf_adjust(vap, hdrspace + meshhdrsize, key, m);
1645 if (m == NULL) {
1646 /* NB: ieee80211_mbuf_adjust handles msgs+statistics */
1647 goto bad;
1648 }
1649 /* NB: this could be optimized 'cuz of ieee80211_mbuf_adjust */
1650 m_adj(m, sizeof(struct ether_header) - sizeof(struct llc));
1651 llc = mtod(m, struct llc *);
1652 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP;
1653 llc->llc_control = LLC_UI;
1654 llc->llc_snap.org_code[0] = 0;
1655 llc->llc_snap.org_code[1] = 0;
1656 llc->llc_snap.org_code[2] = 0;
1657 llc->llc_snap.ether_type = eh.ether_type;
1658 } else {
1659 #ifdef IEEE80211_SUPPORT_SUPERG
1660 /*
1661 * Aggregated frame. Check if it's for AMSDU or FF.
1662 *
1663 * XXX TODO: IEEE80211_NODE_AMSDU* isn't implemented
1664 * anywhere for some reason. But, since 11n requires
1665 * AMSDU RX, we can just assume "11n" == "AMSDU".
1666 */
1667 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG, "%s: called; M_FF\n", __func__);
1668 if (ieee80211_amsdu_tx_ok(ni)) {
1669 m = ieee80211_amsdu_encap(vap, m, hdrspace + meshhdrsize, key);
1670 is_amsdu = 1;
1671 } else {
1672 m = ieee80211_ff_encap(vap, m, hdrspace + meshhdrsize, key);
1673 }
1674 if (m == NULL)
1675 #endif
1676 goto bad;
1677 }
1678 datalen = m->m_pkthdr.len; /* NB: w/o 802.11 header */
1679
1680 M_PREPEND(m, hdrspace + meshhdrsize, M_NOWAIT);
1681 if (m == NULL) {
1682 vap->iv_stats.is_tx_nobuf++;
1683 goto bad;
1684 }
1685 wh = mtod(m, struct ieee80211_frame *);
1686 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_DATA;
1687 *(uint16_t *)wh->i_dur = 0;
1688 qos = NULL; /* NB: quiet compiler */
1689 if (is4addr) {
1690 wh->i_fc[1] = IEEE80211_FC1_DIR_DSTODS;
1691 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr);
1692 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
1693 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost);
1694 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, eh.ether_shost);
1695 } else switch (vap->iv_opmode) {
1696 case IEEE80211_M_STA:
1697 wh->i_fc[1] = IEEE80211_FC1_DIR_TODS;
1698 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_bssid);
1699 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost);
1700 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost);
1701 break;
1702 case IEEE80211_M_IBSS:
1703 case IEEE80211_M_AHDEMO:
1704 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
1705 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost);
1706 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost);
1707 /*
1708 * NB: always use the bssid from iv_bss as the
1709 * neighbor's may be stale after an ibss merge
1710 */
1711 IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_bss->ni_bssid);
1712 break;
1713 case IEEE80211_M_HOSTAP:
1714 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
1715 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost);
1716 IEEE80211_ADDR_COPY(wh->i_addr2, ni->ni_bssid);
1717 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_shost);
1718 break;
1719 #ifdef IEEE80211_SUPPORT_MESH
1720 case IEEE80211_M_MBSS:
1721 /* NB: offset by hdrspace to deal with DATAPAD */
1722 mc = (struct ieee80211_meshcntl_ae10 *)
1723 (mtod(m, uint8_t *) + hdrspace);
1724 wh->i_fc[1] = dir;
1725 switch (meshae) {
1726 case IEEE80211_MESH_AE_00: /* no proxy */
1727 mc->mc_flags = 0;
1728 if (dir == IEEE80211_FC1_DIR_DSTODS) { /* ucast */
1729 IEEE80211_ADDR_COPY(wh->i_addr1,
1730 ni->ni_macaddr);
1731 IEEE80211_ADDR_COPY(wh->i_addr2,
1732 vap->iv_myaddr);
1733 IEEE80211_ADDR_COPY(wh->i_addr3,
1734 eh.ether_dhost);
1735 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4,
1736 eh.ether_shost);
1737 qos =((struct ieee80211_qosframe_addr4 *)
1738 wh)->i_qos;
1739 } else if (dir == IEEE80211_FC1_DIR_FROMDS) {
1740 /* mcast */
1741 IEEE80211_ADDR_COPY(wh->i_addr1,
1742 eh.ether_dhost);
1743 IEEE80211_ADDR_COPY(wh->i_addr2,
1744 vap->iv_myaddr);
1745 IEEE80211_ADDR_COPY(wh->i_addr3,
1746 eh.ether_shost);
1747 qos = ((struct ieee80211_qosframe *)
1748 wh)->i_qos;
1749 }
1750 break;
1751 case IEEE80211_MESH_AE_01: /* mcast, proxy */
1752 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
1753 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost);
1754 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
1755 IEEE80211_ADDR_COPY(wh->i_addr3, vap->iv_myaddr);
1756 mc->mc_flags = 1;
1757 IEEE80211_ADDR_COPY(MC01(mc)->mc_addr4,
1758 eh.ether_shost);
1759 qos = ((struct ieee80211_qosframe *) wh)->i_qos;
1760 break;
1761 case IEEE80211_MESH_AE_10: /* ucast, proxy */
1762 KASSERT(rt != NULL, ("route is NULL"));
1763 IEEE80211_ADDR_COPY(wh->i_addr1, rt->rt_nexthop);
1764 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
1765 IEEE80211_ADDR_COPY(wh->i_addr3, rt->rt_mesh_gate);
1766 IEEE80211_ADDR_COPY(WH4(wh)->i_addr4, vap->iv_myaddr);
1767 mc->mc_flags = IEEE80211_MESH_AE_10;
1768 IEEE80211_ADDR_COPY(mc->mc_addr5, eh.ether_dhost);
1769 IEEE80211_ADDR_COPY(mc->mc_addr6, eh.ether_shost);
1770 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos;
1771 break;
1772 default:
1773 KASSERT(0, ("meshae %d", meshae));
1774 break;
1775 }
1776 mc->mc_ttl = ms->ms_ttl;
1777 ms->ms_seq++;
1778 le32enc(mc->mc_seq, ms->ms_seq);
1779 break;
1780 #endif
1781 case IEEE80211_M_WDS: /* NB: is4addr should always be true */
1782 default:
1783 goto bad;
1784 }
1785 if (m->m_flags & M_MORE_DATA)
1786 wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA;
1787 if (addqos) {
1788 int ac, tid;
1789
1790 if (is4addr) {
1791 qos = ((struct ieee80211_qosframe_addr4 *) wh)->i_qos;
1792 /* NB: mesh case handled earlier */
1793 } else if (vap->iv_opmode != IEEE80211_M_MBSS)
1794 qos = ((struct ieee80211_qosframe *) wh)->i_qos;
1795 ac = M_WME_GETAC(m);
1796 /* map from access class/queue to 11e header priorty value */
1797 tid = WME_AC_TO_TID(ac);
1798 qos[0] = tid & IEEE80211_QOS_TID;
1799 if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[ac].wmep_noackPolicy)
1800 qos[0] |= IEEE80211_QOS_ACKPOLICY_NOACK;
1801 #ifdef IEEE80211_SUPPORT_MESH
1802 if (vap->iv_opmode == IEEE80211_M_MBSS)
1803 qos[1] = IEEE80211_QOS_MC;
1804 else
1805 #endif
1806 qos[1] = 0;
1807 wh->i_fc[0] |= IEEE80211_FC0_SUBTYPE_QOS;
1808
1809 /*
1810 * If this is an A-MSDU then ensure we set the
1811 * relevant field.
1812 */
1813 if (is_amsdu)
1814 qos[0] |= IEEE80211_QOS_AMSDU;
1815
1816 /*
1817 * XXX TODO TX lock is needed for atomic updates of sequence
1818 * numbers. If the driver does it, then don't do it here;
1819 * and we don't need the TX lock held.
1820 */
1821 if ((m->m_flags & M_AMPDU_MPDU) == 0) {
1822 /*
1823 * 802.11-2012 9.3.2.10 -
1824 *
1825 * If this is a multicast frame then we need
1826 * to ensure that the sequence number comes from
1827 * a separate seqno space and not the TID space.
1828 *
1829 * Otherwise multicast frames may actually cause
1830 * holes in the TX blockack window space and
1831 * upset various things.
1832 */
1833 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1834 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++;
1835 else
1836 seqno = ni->ni_txseqs[tid]++;
1837
1838 /*
1839 * NB: don't assign a sequence # to potential
1840 * aggregates; we expect this happens at the
1841 * point the frame comes off any aggregation q
1842 * as otherwise we may introduce holes in the
1843 * BA sequence space and/or make window accouting
1844 * more difficult.
1845 *
1846 * XXX may want to control this with a driver
1847 * capability; this may also change when we pull
1848 * aggregation up into net80211
1849 */
1850 *(uint16_t *)wh->i_seq =
1851 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
1852 M_SEQNO_SET(m, seqno);
1853 } else {
1854 /* NB: zero out i_seq field (for s/w encryption etc) */
1855 *(uint16_t *)wh->i_seq = 0;
1856 }
1857 } else {
1858 /*
1859 * XXX TODO TX lock is needed for atomic updates of sequence
1860 * numbers. If the driver does it, then don't do it here;
1861 * and we don't need the TX lock held.
1862 */
1863 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++;
1864 *(uint16_t *)wh->i_seq =
1865 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
1866 M_SEQNO_SET(m, seqno);
1867
1868 /*
1869 * XXX TODO: we shouldn't allow EAPOL, etc that would
1870 * be forced to be non-QoS traffic to be A-MSDU encapsulated.
1871 */
1872 if (is_amsdu)
1873 printf("%s: XXX ERROR: is_amsdu set; not QoS!\n",
1874 __func__);
1875 }
1876
1877 /*
1878 * Check if xmit fragmentation is required.
1879 *
1880 * If the hardware does fragmentation offload, then don't bother
1881 * doing it here.
1882 */
1883 if (IEEE80211_CONF_FRAG_OFFLOAD(ic))
1884 txfrag = 0;
1885 else
1886 txfrag = (m->m_pkthdr.len > vap->iv_fragthreshold &&
1887 !IEEE80211_IS_MULTICAST(wh->i_addr1) &&
1888 (vap->iv_caps & IEEE80211_C_TXFRAG) &&
1889 (m->m_flags & (M_FF | M_AMPDU_MPDU)) == 0);
1890
1891 if (key != NULL) {
1892 /*
1893 * IEEE 802.1X: send EAPOL frames always in the clear.
1894 * WPA/WPA2: encrypt EAPOL keys when pairwise keys are set.
1895 */
1896 if ((m->m_flags & M_EAPOL) == 0 ||
1897 ((vap->iv_flags & IEEE80211_F_WPA) &&
1898 (vap->iv_opmode == IEEE80211_M_STA ?
1899 !IEEE80211_KEY_UNDEFINED(key) :
1900 !IEEE80211_KEY_UNDEFINED(&ni->ni_ucastkey)))) {
1901 wh->i_fc[1] |= IEEE80211_FC1_PROTECTED;
1902 if (!ieee80211_crypto_enmic(vap, key, m, txfrag)) {
1903 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT,
1904 eh.ether_dhost,
1905 "%s", "enmic failed, discard frame");
1906 vap->iv_stats.is_crypto_enmicfail++;
1907 goto bad;
1908 }
1909 }
1910 }
1911 if (txfrag && !ieee80211_fragment(vap, m, hdrsize,
1912 key != NULL ? key->wk_cipher->ic_header : 0, vap->iv_fragthreshold))
1913 goto bad;
1914
1915 m->m_flags |= M_ENCAP; /* mark encapsulated */
1916
1917 IEEE80211_NODE_STAT(ni, tx_data);
1918 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1919 IEEE80211_NODE_STAT(ni, tx_mcast);
1920 m->m_flags |= M_MCAST;
1921 } else
1922 IEEE80211_NODE_STAT(ni, tx_ucast);
1923 IEEE80211_NODE_STAT_ADD(ni, tx_bytes, datalen);
1924
1925 return m;
1926 bad:
1927 if (m != NULL)
1928 m_freem(m);
1929 return NULL;
1930 #undef WH4
1931 #undef MC01
1932 }
1933
1934 void
1935 ieee80211_free_mbuf(struct mbuf *m)
1936 {
1937 struct mbuf *next;
1938
1939 if (m == NULL)
1940 return;
1941
1942 do {
1943 next = m->m_nextpkt;
1944 m->m_nextpkt = NULL;
1945 m_freem(m);
1946 } while ((m = next) != NULL);
1947 }
1948
1949 /*
1950 * Fragment the frame according to the specified mtu.
1951 * The size of the 802.11 header (w/o padding) is provided
1952 * so we don't need to recalculate it. We create a new
1953 * mbuf for each fragment and chain it through m_nextpkt;
1954 * we might be able to optimize this by reusing the original
1955 * packet's mbufs but that is significantly more complicated.
1956 */
1957 static int
1958 ieee80211_fragment(struct ieee80211vap *vap, struct mbuf *m0,
1959 u_int hdrsize, u_int ciphdrsize, u_int mtu)
1960 {
1961 struct ieee80211com *ic = vap->iv_ic;
1962 struct ieee80211_frame *wh, *whf;
1963 struct mbuf *m, *prev;
1964 u_int totalhdrsize, fragno, fragsize, off, remainder, payload;
1965 u_int hdrspace;
1966
1967 KASSERT(m0->m_nextpkt == NULL, ("mbuf already chained?"));
1968 KASSERT(m0->m_pkthdr.len > mtu,
1969 ("pktlen %u mtu %u", m0->m_pkthdr.len, mtu));
1970
1971 /*
1972 * Honor driver DATAPAD requirement.
1973 */
1974 if (ic->ic_flags & IEEE80211_F_DATAPAD)
1975 hdrspace = roundup(hdrsize, sizeof(uint32_t));
1976 else
1977 hdrspace = hdrsize;
1978
1979 wh = mtod(m0, struct ieee80211_frame *);
1980 /* NB: mark the first frag; it will be propagated below */
1981 wh->i_fc[1] |= IEEE80211_FC1_MORE_FRAG;
1982 totalhdrsize = hdrspace + ciphdrsize;
1983 fragno = 1;
1984 off = mtu - ciphdrsize;
1985 remainder = m0->m_pkthdr.len - off;
1986 prev = m0;
1987 do {
1988 fragsize = MIN(totalhdrsize + remainder, mtu);
1989 m = m_get2(fragsize, M_NOWAIT, MT_DATA, M_PKTHDR);
1990 if (m == NULL)
1991 goto bad;
1992 /* leave room to prepend any cipher header */
1993 m_align(m, fragsize - ciphdrsize);
1994
1995 /*
1996 * Form the header in the fragment. Note that since
1997 * we mark the first fragment with the MORE_FRAG bit
1998 * it automatically is propagated to each fragment; we
1999 * need only clear it on the last fragment (done below).
2000 * NB: frag 1+ dont have Mesh Control field present.
2001 */
2002 whf = mtod(m, struct ieee80211_frame *);
2003 memcpy(whf, wh, hdrsize);
2004 #ifdef IEEE80211_SUPPORT_MESH
2005 if (vap->iv_opmode == IEEE80211_M_MBSS)
2006 ieee80211_getqos(wh)[1] &= ~IEEE80211_QOS_MC;
2007 #endif
2008 *(uint16_t *)&whf->i_seq[0] |= htole16(
2009 (fragno & IEEE80211_SEQ_FRAG_MASK) <<
2010 IEEE80211_SEQ_FRAG_SHIFT);
2011 fragno++;
2012
2013 payload = fragsize - totalhdrsize;
2014 /* NB: destination is known to be contiguous */
2015
2016 m_copydata(m0, off, payload, mtod(m, uint8_t *) + hdrspace);
2017 m->m_len = hdrspace + payload;
2018 m->m_pkthdr.len = hdrspace + payload;
2019 m->m_flags |= M_FRAG;
2020
2021 /* chain up the fragment */
2022 prev->m_nextpkt = m;
2023 prev = m;
2024
2025 /* deduct fragment just formed */
2026 remainder -= payload;
2027 off += payload;
2028 } while (remainder != 0);
2029
2030 /* set the last fragment */
2031 m->m_flags |= M_LASTFRAG;
2032 whf->i_fc[1] &= ~IEEE80211_FC1_MORE_FRAG;
2033
2034 /* strip first mbuf now that everything has been copied */
2035 m_adj(m0, -(m0->m_pkthdr.len - (mtu - ciphdrsize)));
2036 m0->m_flags |= M_FIRSTFRAG | M_FRAG;
2037
2038 vap->iv_stats.is_tx_fragframes++;
2039 vap->iv_stats.is_tx_frags += fragno-1;
2040
2041 return 1;
2042 bad:
2043 /* reclaim fragments but leave original frame for caller to free */
2044 ieee80211_free_mbuf(m0->m_nextpkt);
2045 m0->m_nextpkt = NULL;
2046 return 0;
2047 }
2048
2049 /*
2050 * Add a supported rates element id to a frame.
2051 */
2052 uint8_t *
2053 ieee80211_add_rates(uint8_t *frm, const struct ieee80211_rateset *rs)
2054 {
2055 int nrates;
2056
2057 *frm++ = IEEE80211_ELEMID_RATES;
2058 nrates = rs->rs_nrates;
2059 if (nrates > IEEE80211_RATE_SIZE)
2060 nrates = IEEE80211_RATE_SIZE;
2061 *frm++ = nrates;
2062 memcpy(frm, rs->rs_rates, nrates);
2063 return frm + nrates;
2064 }
2065
2066 /*
2067 * Add an extended supported rates element id to a frame.
2068 */
2069 uint8_t *
2070 ieee80211_add_xrates(uint8_t *frm, const struct ieee80211_rateset *rs)
2071 {
2072 /*
2073 * Add an extended supported rates element if operating in 11g mode.
2074 */
2075 if (rs->rs_nrates > IEEE80211_RATE_SIZE) {
2076 int nrates = rs->rs_nrates - IEEE80211_RATE_SIZE;
2077 *frm++ = IEEE80211_ELEMID_XRATES;
2078 *frm++ = nrates;
2079 memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates);
2080 frm += nrates;
2081 }
2082 return frm;
2083 }
2084
2085 /*
2086 * Add an ssid element to a frame.
2087 */
2088 uint8_t *
2089 ieee80211_add_ssid(uint8_t *frm, const uint8_t *ssid, u_int len)
2090 {
2091 *frm++ = IEEE80211_ELEMID_SSID;
2092 *frm++ = len;
2093 memcpy(frm, ssid, len);
2094 return frm + len;
2095 }
2096
2097 /*
2098 * Add an erp element to a frame.
2099 */
2100 static uint8_t *
2101 ieee80211_add_erp(uint8_t *frm, struct ieee80211vap *vap)
2102 {
2103 struct ieee80211com *ic = vap->iv_ic;
2104 uint8_t erp;
2105
2106 *frm++ = IEEE80211_ELEMID_ERP;
2107 *frm++ = 1;
2108 erp = 0;
2109
2110 /*
2111 * TODO: This uses the global flags for now because
2112 * the per-VAP flags are fine for per-VAP, but don't
2113 * take into account which VAPs share the same channel
2114 * and which are on different channels.
2115 *
2116 * ERP and HT/VHT protection mode is a function of
2117 * how many stations are on a channel, not specifically
2118 * the VAP or global. But, until we grow that status,
2119 * the global flag will have to do.
2120 */
2121 if (ic->ic_flags_ext & IEEE80211_FEXT_NONERP_PR)
2122 erp |= IEEE80211_ERP_NON_ERP_PRESENT;
2123
2124 /*
2125 * TODO: same as above; these should be based not
2126 * on the vap or ic flags, but instead on a combination
2127 * of per-VAP and channels.
2128 */
2129 if (ic->ic_flags & IEEE80211_F_USEPROT)
2130 erp |= IEEE80211_ERP_USE_PROTECTION;
2131 if (ic->ic_flags & IEEE80211_F_USEBARKER)
2132 erp |= IEEE80211_ERP_LONG_PREAMBLE;
2133 *frm++ = erp;
2134 return frm;
2135 }
2136
2137 /*
2138 * Add a CFParams element to a frame.
2139 */
2140 static uint8_t *
2141 ieee80211_add_cfparms(uint8_t *frm, struct ieee80211com *ic)
2142 {
2143 #define ADDSHORT(frm, v) do { \
2144 le16enc(frm, v); \
2145 frm += 2; \
2146 } while (0)
2147 *frm++ = IEEE80211_ELEMID_CFPARMS;
2148 *frm++ = 6;
2149 *frm++ = 0; /* CFP count */
2150 *frm++ = 2; /* CFP period */
2151 ADDSHORT(frm, 0); /* CFP MaxDuration (TU) */
2152 ADDSHORT(frm, 0); /* CFP CurRemaining (TU) */
2153 return frm;
2154 #undef ADDSHORT
2155 }
2156
2157 static __inline uint8_t *
2158 add_appie(uint8_t *frm, const struct ieee80211_appie *ie)
2159 {
2160 memcpy(frm, ie->ie_data, ie->ie_len);
2161 return frm + ie->ie_len;
2162 }
2163
2164 static __inline uint8_t *
2165 add_ie(uint8_t *frm, const uint8_t *ie)
2166 {
2167 memcpy(frm, ie, 2 + ie[1]);
2168 return frm + 2 + ie[1];
2169 }
2170
2171 #define WME_OUI_BYTES 0x00, 0x50, 0xf2
2172 /*
2173 * Add a WME information element to a frame.
2174 */
2175 uint8_t *
2176 ieee80211_add_wme_info(uint8_t *frm, struct ieee80211_wme_state *wme,
2177 struct ieee80211_node *ni)
2178 {
2179 static const uint8_t oui[4] = { WME_OUI_BYTES, WME_OUI_TYPE };
2180 struct ieee80211vap *vap = ni->ni_vap;
2181
2182 *frm++ = IEEE80211_ELEMID_VENDOR;
2183 *frm++ = sizeof(struct ieee80211_wme_info) - 2;
2184 memcpy(frm, oui, sizeof(oui));
2185 frm += sizeof(oui);
2186 *frm++ = WME_INFO_OUI_SUBTYPE;
2187 *frm++ = WME_VERSION;
2188
2189 /* QoS info field depends upon operating mode */
2190 switch (vap->iv_opmode) {
2191 case IEEE80211_M_HOSTAP:
2192 *frm = wme->wme_bssChanParams.cap_info;
2193 if (vap->iv_flags_ext & IEEE80211_FEXT_UAPSD)
2194 *frm |= WME_CAPINFO_UAPSD_EN;
2195 frm++;
2196 break;
2197 case IEEE80211_M_STA:
2198 /*
2199 * NB: UAPSD drivers must set this up in their
2200 * VAP creation method.
2201 */
2202 *frm++ = vap->iv_uapsdinfo;
2203 break;
2204 default:
2205 *frm++ = 0;
2206 break;
2207 }
2208
2209 return frm;
2210 }
2211
2212 /*
2213 * Add a WME parameters element to a frame.
2214 */
2215 static uint8_t *
2216 ieee80211_add_wme_param(uint8_t *frm, struct ieee80211_wme_state *wme,
2217 int uapsd_enable)
2218 {
2219 #define ADDSHORT(frm, v) do { \
2220 le16enc(frm, v); \
2221 frm += 2; \
2222 } while (0)
2223 /* NB: this works 'cuz a param has an info at the front */
2224 static const struct ieee80211_wme_info param = {
2225 .wme_id = IEEE80211_ELEMID_VENDOR,
2226 .wme_len = sizeof(struct ieee80211_wme_param) - 2,
2227 .wme_oui = { WME_OUI_BYTES },
2228 .wme_type = WME_OUI_TYPE,
2229 .wme_subtype = WME_PARAM_OUI_SUBTYPE,
2230 .wme_version = WME_VERSION,
2231 };
2232 int i;
2233
2234 memcpy(frm, ¶m, sizeof(param));
2235 frm += __offsetof(struct ieee80211_wme_info, wme_info);
2236 *frm = wme->wme_bssChanParams.cap_info; /* AC info */
2237 if (uapsd_enable)
2238 *frm |= WME_CAPINFO_UAPSD_EN;
2239 frm++;
2240 *frm++ = 0; /* reserved field */
2241 /* XXX TODO - U-APSD bits - SP, flags below */
2242 for (i = 0; i < WME_NUM_AC; i++) {
2243 const struct wmeParams *ac =
2244 &wme->wme_bssChanParams.cap_wmeParams[i];
2245 *frm++ = _IEEE80211_SHIFTMASK(i, WME_PARAM_ACI)
2246 | _IEEE80211_SHIFTMASK(ac->wmep_acm, WME_PARAM_ACM)
2247 | _IEEE80211_SHIFTMASK(ac->wmep_aifsn, WME_PARAM_AIFSN)
2248 ;
2249 *frm++ = _IEEE80211_SHIFTMASK(ac->wmep_logcwmax,
2250 WME_PARAM_LOGCWMAX)
2251 | _IEEE80211_SHIFTMASK(ac->wmep_logcwmin,
2252 WME_PARAM_LOGCWMIN)
2253 ;
2254 ADDSHORT(frm, ac->wmep_txopLimit);
2255 }
2256 return frm;
2257 #undef ADDSHORT
2258 }
2259 #undef WME_OUI_BYTES
2260
2261 /*
2262 * Add an 11h Power Constraint element to a frame.
2263 */
2264 static uint8_t *
2265 ieee80211_add_powerconstraint(uint8_t *frm, struct ieee80211vap *vap)
2266 {
2267 const struct ieee80211_channel *c = vap->iv_bss->ni_chan;
2268 /* XXX per-vap tx power limit? */
2269 int8_t limit = vap->iv_ic->ic_txpowlimit / 2;
2270
2271 frm[0] = IEEE80211_ELEMID_PWRCNSTR;
2272 frm[1] = 1;
2273 frm[2] = c->ic_maxregpower > limit ? c->ic_maxregpower - limit : 0;
2274 return frm + 3;
2275 }
2276
2277 /*
2278 * Add an 11h Power Capability element to a frame.
2279 */
2280 static uint8_t *
2281 ieee80211_add_powercapability(uint8_t *frm, const struct ieee80211_channel *c)
2282 {
2283 frm[0] = IEEE80211_ELEMID_PWRCAP;
2284 frm[1] = 2;
2285 frm[2] = c->ic_minpower;
2286 frm[3] = c->ic_maxpower;
2287 return frm + 4;
2288 }
2289
2290 /*
2291 * Add an 11h Supported Channels element to a frame.
2292 */
2293 static uint8_t *
2294 ieee80211_add_supportedchannels(uint8_t *frm, struct ieee80211com *ic)
2295 {
2296 static const int ielen = 26;
2297
2298 frm[0] = IEEE80211_ELEMID_SUPPCHAN;
2299 frm[1] = ielen;
2300 /* XXX not correct */
2301 memcpy(frm+2, ic->ic_chan_avail, ielen);
2302 return frm + 2 + ielen;
2303 }
2304
2305 /*
2306 * Add an 11h Quiet time element to a frame.
2307 */
2308 static uint8_t *
2309 ieee80211_add_quiet(uint8_t *frm, struct ieee80211vap *vap, int update)
2310 {
2311 struct ieee80211_quiet_ie *quiet = (struct ieee80211_quiet_ie *) frm;
2312
2313 quiet->quiet_ie = IEEE80211_ELEMID_QUIET;
2314 quiet->len = 6;
2315
2316 /*
2317 * Only update every beacon interval - otherwise probe responses
2318 * would update the quiet count value.
2319 */
2320 if (update) {
2321 if (vap->iv_quiet_count_value == 1)
2322 vap->iv_quiet_count_value = vap->iv_quiet_count;
2323 else if (vap->iv_quiet_count_value > 1)
2324 vap->iv_quiet_count_value--;
2325 }
2326
2327 if (vap->iv_quiet_count_value == 0) {
2328 /* value 0 is reserved as per 802.11h standerd */
2329 vap->iv_quiet_count_value = 1;
2330 }
2331
2332 quiet->tbttcount = vap->iv_quiet_count_value;
2333 quiet->period = vap->iv_quiet_period;
2334 quiet->duration = htole16(vap->iv_quiet_duration);
2335 quiet->offset = htole16(vap->iv_quiet_offset);
2336 return frm + sizeof(*quiet);
2337 }
2338
2339 /*
2340 * Add an 11h Channel Switch Announcement element to a frame.
2341 * Note that we use the per-vap CSA count to adjust the global
2342 * counter so we can use this routine to form probe response
2343 * frames and get the current count.
2344 */
2345 static uint8_t *
2346 ieee80211_add_csa(uint8_t *frm, struct ieee80211vap *vap)
2347 {
2348 struct ieee80211com *ic = vap->iv_ic;
2349 struct ieee80211_csa_ie *csa = (struct ieee80211_csa_ie *) frm;
2350
2351 csa->csa_ie = IEEE80211_ELEMID_CSA;
2352 csa->csa_len = 3;
2353 csa->csa_mode = 1; /* XXX force quiet on channel */
2354 csa->csa_newchan = ieee80211_chan2ieee(ic, ic->ic_csa_newchan);
2355 csa->csa_count = ic->ic_csa_count - vap->iv_csa_count;
2356 return frm + sizeof(*csa);
2357 }
2358
2359 /*
2360 * Add an 11h country information element to a frame.
2361 */
2362 static uint8_t *
2363 ieee80211_add_countryie(uint8_t *frm, struct ieee80211com *ic)
2364 {
2365
2366 if (ic->ic_countryie == NULL ||
2367 ic->ic_countryie_chan != ic->ic_bsschan) {
2368 /*
2369 * Handle lazy construction of ie. This is done on
2370 * first use and after a channel change that requires
2371 * re-calculation.
2372 */
2373 if (ic->ic_countryie != NULL)
2374 IEEE80211_FREE(ic->ic_countryie, M_80211_NODE_IE);
2375 ic->ic_countryie = ieee80211_alloc_countryie(ic);
2376 if (ic->ic_countryie == NULL)
2377 return frm;
2378 ic->ic_countryie_chan = ic->ic_bsschan;
2379 }
2380 return add_appie(frm, ic->ic_countryie);
2381 }
2382
2383 uint8_t *
2384 ieee80211_add_wpa(uint8_t *frm, const struct ieee80211vap *vap)
2385 {
2386 if (vap->iv_flags & IEEE80211_F_WPA1 && vap->iv_wpa_ie != NULL)
2387 return (add_ie(frm, vap->iv_wpa_ie));
2388 else {
2389 /* XXX else complain? */
2390 return (frm);
2391 }
2392 }
2393
2394 uint8_t *
2395 ieee80211_add_rsn(uint8_t *frm, const struct ieee80211vap *vap)
2396 {
2397 if (vap->iv_flags & IEEE80211_F_WPA2 && vap->iv_rsn_ie != NULL)
2398 return (add_ie(frm, vap->iv_rsn_ie));
2399 else {
2400 /* XXX else complain? */
2401 return (frm);
2402 }
2403 }
2404
2405 uint8_t *
2406 ieee80211_add_qos(uint8_t *frm, const struct ieee80211_node *ni)
2407 {
2408 if (ni->ni_flags & IEEE80211_NODE_QOS) {
2409 *frm++ = IEEE80211_ELEMID_QOS;
2410 *frm++ = 1;
2411 *frm++ = 0;
2412 }
2413
2414 return (frm);
2415 }
2416
2417 /*
2418 * Send a probe request frame with the specified ssid
2419 * and any optional information element data.
2420 */
2421 int
2422 ieee80211_send_probereq(struct ieee80211_node *ni,
2423 const uint8_t sa[IEEE80211_ADDR_LEN],
2424 const uint8_t da[IEEE80211_ADDR_LEN],
2425 const uint8_t bssid[IEEE80211_ADDR_LEN],
2426 const uint8_t *ssid, size_t ssidlen)
2427 {
2428 struct ieee80211vap *vap = ni->ni_vap;
2429 struct ieee80211com *ic = ni->ni_ic;
2430 struct ieee80211_node *bss;
2431 const struct ieee80211_txparam *tp;
2432 struct ieee80211_bpf_params params;
2433 const struct ieee80211_rateset *rs;
2434 struct mbuf *m;
2435 uint8_t *frm;
2436 int ret;
2437
2438 bss = ieee80211_ref_node(vap->iv_bss);
2439
2440 if (vap->iv_state == IEEE80211_S_CAC) {
2441 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni,
2442 "block %s frame in CAC state", "probe request");
2443 vap->iv_stats.is_tx_badstate++;
2444 ieee80211_free_node(bss);
2445 return EIO; /* XXX */
2446 }
2447
2448 /*
2449 * Hold a reference on the node so it doesn't go away until after
2450 * the xmit is complete all the way in the driver. On error we
2451 * will remove our reference.
2452 */
2453 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2454 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n",
2455 __func__, __LINE__,
2456 ni, ether_sprintf(ni->ni_macaddr),
2457 ieee80211_node_refcnt(ni)+1);
2458 ieee80211_ref_node(ni);
2459
2460 /*
2461 * prreq frame format
2462 * [tlv] ssid
2463 * [tlv] supported rates
2464 * [tlv] RSN (optional)
2465 * [tlv] extended supported rates
2466 * [tlv] HT cap (optional)
2467 * [tlv] VHT cap (optional)
2468 * [tlv] WPA (optional)
2469 * [tlv] user-specified ie's
2470 */
2471 m = ieee80211_getmgtframe(&frm,
2472 ic->ic_headroom + sizeof(struct ieee80211_frame),
2473 2 + IEEE80211_NWID_LEN
2474 + 2 + IEEE80211_RATE_SIZE
2475 + sizeof(struct ieee80211_ie_htcap)
2476 + sizeof(struct ieee80211_ie_vhtcap)
2477 + sizeof(struct ieee80211_ie_htinfo) /* XXX not needed? */
2478 + sizeof(struct ieee80211_ie_wpa)
2479 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2480 + sizeof(struct ieee80211_ie_wpa)
2481 + (vap->iv_appie_probereq != NULL ?
2482 vap->iv_appie_probereq->ie_len : 0)
2483 );
2484 if (m == NULL) {
2485 vap->iv_stats.is_tx_nobuf++;
2486 ieee80211_free_node(ni);
2487 ieee80211_free_node(bss);
2488 return ENOMEM;
2489 }
2490
2491 frm = ieee80211_add_ssid(frm, ssid, ssidlen);
2492 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2493 frm = ieee80211_add_rates(frm, rs);
2494 frm = ieee80211_add_rsn(frm, vap);
2495 frm = ieee80211_add_xrates(frm, rs);
2496
2497 /*
2498 * Note: we can't use bss; we don't have one yet.
2499 *
2500 * So, we should announce our capabilities
2501 * in this channel mode (2g/5g), not the
2502 * channel details itself.
2503 */
2504 if ((vap->iv_opmode == IEEE80211_M_IBSS) &&
2505 (vap->iv_flags_ht & IEEE80211_FHT_HT)) {
2506 struct ieee80211_channel *c;
2507
2508 /*
2509 * Get the HT channel that we should try upgrading to.
2510 * If we can do 40MHz then this'll upgrade it appropriately.
2511 */
2512 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
2513 vap->iv_flags_ht);
2514 frm = ieee80211_add_htcap_ch(frm, vap, c);
2515 }
2516
2517 /*
2518 * XXX TODO: need to figure out what/how to update the
2519 * VHT channel.
2520 */
2521 #if 0
2522 (vap->iv_flags_vht & IEEE80211_FVHT_VHT) {
2523 struct ieee80211_channel *c;
2524
2525 c = ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
2526 vap->iv_flags_ht);
2527 c = ieee80211_vht_adjust_channel(ic, c, vap->iv_flags_vht);
2528 frm = ieee80211_add_vhtcap_ch(frm, vap, c);
2529 }
2530 #endif
2531
2532 frm = ieee80211_add_wpa(frm, vap);
2533 if (vap->iv_appie_probereq != NULL)
2534 frm = add_appie(frm, vap->iv_appie_probereq);
2535 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2536
2537 KASSERT(M_LEADINGSPACE(m) >= sizeof(struct ieee80211_frame),
2538 ("leading space %zd", M_LEADINGSPACE(m)));
2539 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT);
2540 if (m == NULL) {
2541 /* NB: cannot happen */
2542 ieee80211_free_node(ni);
2543 ieee80211_free_node(bss);
2544 return ENOMEM;
2545 }
2546
2547 IEEE80211_TX_LOCK(ic);
2548 ieee80211_send_setup(ni, m,
2549 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ,
2550 IEEE80211_NONQOS_TID, sa, da, bssid);
2551 /* XXX power management? */
2552 m->m_flags |= M_ENCAP; /* mark encapsulated */
2553
2554 M_WME_SETAC(m, WME_AC_BE);
2555
2556 IEEE80211_NODE_STAT(ni, tx_probereq);
2557 IEEE80211_NODE_STAT(ni, tx_mgmt);
2558
2559 IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS,
2560 "send probe req on channel %u bssid %s sa %6D da %6D ssid \"%.*s\"\n",
2561 ieee80211_chan2ieee(ic, ic->ic_curchan),
2562 ether_sprintf(bssid),
2563 sa, ":",
2564 da, ":",
2565 ssidlen, ssid);
2566
2567 memset(¶ms, 0, sizeof(params));
2568 params.ibp_pri = M_WME_GETAC(m);
2569 tp = &vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)];
2570 params.ibp_rate0 = tp->mgmtrate;
2571 if (IEEE80211_IS_MULTICAST(da)) {
2572 params.ibp_flags |= IEEE80211_BPF_NOACK;
2573 params.ibp_try0 = 1;
2574 } else
2575 params.ibp_try0 = tp->maxretry;
2576 params.ibp_power = ni->ni_txpower;
2577 ret = ieee80211_raw_output(vap, ni, m, ¶ms);
2578 IEEE80211_TX_UNLOCK(ic);
2579 ieee80211_free_node(bss);
2580 return (ret);
2581 }
2582
2583 /*
2584 * Calculate capability information for mgt frames.
2585 */
2586 uint16_t
2587 ieee80211_getcapinfo(struct ieee80211vap *vap, struct ieee80211_channel *chan)
2588 {
2589 uint16_t capinfo;
2590
2591 KASSERT(vap->iv_opmode != IEEE80211_M_STA, ("station mode"));
2592
2593 if (vap->iv_opmode == IEEE80211_M_HOSTAP)
2594 capinfo = IEEE80211_CAPINFO_ESS;
2595 else if (vap->iv_opmode == IEEE80211_M_IBSS)
2596 capinfo = IEEE80211_CAPINFO_IBSS;
2597 else
2598 capinfo = 0;
2599 if (vap->iv_flags & IEEE80211_F_PRIVACY)
2600 capinfo |= IEEE80211_CAPINFO_PRIVACY;
2601 if ((vap->iv_flags & IEEE80211_F_SHPREAMBLE) &&
2602 IEEE80211_IS_CHAN_2GHZ(chan))
2603 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
2604 if (vap->iv_flags & IEEE80211_F_SHSLOT)
2605 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
2606 if (IEEE80211_IS_CHAN_5GHZ(chan) && (vap->iv_flags & IEEE80211_F_DOTH))
2607 capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT;
2608 return capinfo;
2609 }
2610
2611 /*
2612 * Send a management frame. The node is for the destination (or ic_bss
2613 * when in station mode). Nodes other than ic_bss have their reference
2614 * count bumped to reflect our use for an indeterminant time.
2615 */
2616 int
2617 ieee80211_send_mgmt(struct ieee80211_node *ni, int type, int arg)
2618 {
2619 #define HTFLAGS (IEEE80211_NODE_HT | IEEE80211_NODE_HTCOMPAT)
2620 #define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0)
2621 struct ieee80211vap *vap = ni->ni_vap;
2622 struct ieee80211com *ic = ni->ni_ic;
2623 struct ieee80211_node *bss = vap->iv_bss;
2624 struct ieee80211_bpf_params params;
2625 struct mbuf *m;
2626 uint8_t *frm;
2627 uint16_t capinfo;
2628 int has_challenge, is_shared_key, ret, status;
2629
2630 KASSERT(ni != NULL, ("null node"));
2631
2632 /*
2633 * Hold a reference on the node so it doesn't go away until after
2634 * the xmit is complete all the way in the driver. On error we
2635 * will remove our reference.
2636 */
2637 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2638 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n",
2639 __func__, __LINE__,
2640 ni, ether_sprintf(ni->ni_macaddr),
2641 ieee80211_node_refcnt(ni)+1);
2642 ieee80211_ref_node(ni);
2643
2644 memset(¶ms, 0, sizeof(params));
2645 switch (type) {
2646
2647 case IEEE80211_FC0_SUBTYPE_AUTH:
2648 status = arg >> 16;
2649 arg &= 0xffff;
2650 has_challenge = ((arg == IEEE80211_AUTH_SHARED_CHALLENGE ||
2651 arg == IEEE80211_AUTH_SHARED_RESPONSE) &&
2652 ni->ni_challenge != NULL);
2653
2654 /*
2655 * Deduce whether we're doing open authentication or
2656 * shared key authentication. We do the latter if
2657 * we're in the middle of a shared key authentication
2658 * handshake or if we're initiating an authentication
2659 * request and configured to use shared key.
2660 */
2661 is_shared_key = has_challenge ||
2662 arg >= IEEE80211_AUTH_SHARED_RESPONSE ||
2663 (arg == IEEE80211_AUTH_SHARED_REQUEST &&
2664 bss->ni_authmode == IEEE80211_AUTH_SHARED);
2665
2666 m = ieee80211_getmgtframe(&frm,
2667 ic->ic_headroom + sizeof(struct ieee80211_frame),
2668 3 * sizeof(uint16_t)
2669 + (has_challenge && status == IEEE80211_STATUS_SUCCESS ?
2670 sizeof(uint16_t)+IEEE80211_CHALLENGE_LEN : 0)
2671 );
2672 if (m == NULL)
2673 senderr(ENOMEM, is_tx_nobuf);
2674
2675 ((uint16_t *)frm)[0] =
2676 (is_shared_key) ? htole16(IEEE80211_AUTH_ALG_SHARED)
2677 : htole16(IEEE80211_AUTH_ALG_OPEN);
2678 ((uint16_t *)frm)[1] = htole16(arg); /* sequence number */
2679 ((uint16_t *)frm)[2] = htole16(status);/* status */
2680
2681 if (has_challenge && status == IEEE80211_STATUS_SUCCESS) {
2682 ((uint16_t *)frm)[3] =
2683 htole16((IEEE80211_CHALLENGE_LEN << 8) |
2684 IEEE80211_ELEMID_CHALLENGE);
2685 memcpy(&((uint16_t *)frm)[4], ni->ni_challenge,
2686 IEEE80211_CHALLENGE_LEN);
2687 m->m_pkthdr.len = m->m_len =
2688 4 * sizeof(uint16_t) + IEEE80211_CHALLENGE_LEN;
2689 if (arg == IEEE80211_AUTH_SHARED_RESPONSE) {
2690 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni,
2691 "request encrypt frame (%s)", __func__);
2692 /* mark frame for encryption */
2693 params.ibp_flags |= IEEE80211_BPF_CRYPTO;
2694 }
2695 } else
2696 m->m_pkthdr.len = m->m_len = 3 * sizeof(uint16_t);
2697
2698 /* XXX not right for shared key */
2699 if (status == IEEE80211_STATUS_SUCCESS)
2700 IEEE80211_NODE_STAT(ni, tx_auth);
2701 else
2702 IEEE80211_NODE_STAT(ni, tx_auth_fail);
2703
2704 if (vap->iv_opmode == IEEE80211_M_STA)
2705 ieee80211_add_callback(m, ieee80211_tx_mgt_cb,
2706 (void *) vap->iv_state);
2707 break;
2708
2709 case IEEE80211_FC0_SUBTYPE_DEAUTH:
2710 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni,
2711 "send station deauthenticate (reason: %d (%s))", arg,
2712 ieee80211_reason_to_string(arg));
2713 m = ieee80211_getmgtframe(&frm,
2714 ic->ic_headroom + sizeof(struct ieee80211_frame),
2715 sizeof(uint16_t));
2716 if (m == NULL)
2717 senderr(ENOMEM, is_tx_nobuf);
2718 *(uint16_t *)frm = htole16(arg); /* reason */
2719 m->m_pkthdr.len = m->m_len = sizeof(uint16_t);
2720
2721 IEEE80211_NODE_STAT(ni, tx_deauth);
2722 IEEE80211_NODE_STAT_SET(ni, tx_deauth_code, arg);
2723
2724 ieee80211_node_unauthorize(ni); /* port closed */
2725 break;
2726
2727 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
2728 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
2729 /*
2730 * asreq frame format
2731 * [2] capability information
2732 * [2] listen interval
2733 * [6*] current AP address (reassoc only)
2734 * [tlv] ssid
2735 * [tlv] supported rates
2736 * [tlv] extended supported rates
2737 * [4] power capability (optional)
2738 * [28] supported channels (optional)
2739 * [tlv] HT capabilities
2740 * [tlv] VHT capabilities
2741 * [tlv] WME (optional)
2742 * [tlv] Vendor OUI HT capabilities (optional)
2743 * [tlv] Atheros capabilities (if negotiated)
2744 * [tlv] AppIE's (optional)
2745 */
2746 m = ieee80211_getmgtframe(&frm,
2747 ic->ic_headroom + sizeof(struct ieee80211_frame),
2748 sizeof(uint16_t)
2749 + sizeof(uint16_t)
2750 + IEEE80211_ADDR_LEN
2751 + 2 + IEEE80211_NWID_LEN
2752 + 2 + IEEE80211_RATE_SIZE
2753 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2754 + 4
2755 + 2 + 26
2756 + sizeof(struct ieee80211_wme_info)
2757 + sizeof(struct ieee80211_ie_htcap)
2758 + sizeof(struct ieee80211_ie_vhtcap)
2759 + 4 + sizeof(struct ieee80211_ie_htcap)
2760 #ifdef IEEE80211_SUPPORT_SUPERG
2761 + sizeof(struct ieee80211_ath_ie)
2762 #endif
2763 + (vap->iv_appie_wpa != NULL ?
2764 vap->iv_appie_wpa->ie_len : 0)
2765 + (vap->iv_appie_assocreq != NULL ?
2766 vap->iv_appie_assocreq->ie_len : 0)
2767 );
2768 if (m == NULL)
2769 senderr(ENOMEM, is_tx_nobuf);
2770
2771 KASSERT(vap->iv_opmode == IEEE80211_M_STA,
2772 ("wrong mode %u", vap->iv_opmode));
2773 capinfo = IEEE80211_CAPINFO_ESS;
2774 if (vap->iv_flags & IEEE80211_F_PRIVACY)
2775 capinfo |= IEEE80211_CAPINFO_PRIVACY;
2776 /*
2777 * NB: Some 11a AP's reject the request when
2778 * short preamble is set.
2779 */
2780 if ((vap->iv_flags & IEEE80211_F_SHPREAMBLE) &&
2781 IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan))
2782 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
2783 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
2784 (ic->ic_caps & IEEE80211_C_SHSLOT))
2785 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
2786 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) &&
2787 (vap->iv_flags & IEEE80211_F_DOTH))
2788 capinfo |= IEEE80211_CAPINFO_SPECTRUM_MGMT;
2789 *(uint16_t *)frm = htole16(capinfo);
2790 frm += 2;
2791
2792 KASSERT(bss->ni_intval != 0, ("beacon interval is zero!"));
2793 *(uint16_t *)frm = htole16(howmany(ic->ic_lintval,
2794 bss->ni_intval));
2795 frm += 2;
2796
2797 if (type == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) {
2798 IEEE80211_ADDR_COPY(frm, bss->ni_bssid);
2799 frm += IEEE80211_ADDR_LEN;
2800 }
2801
2802 frm = ieee80211_add_ssid(frm, ni->ni_essid, ni->ni_esslen);
2803 frm = ieee80211_add_rates(frm, &ni->ni_rates);
2804 frm = ieee80211_add_rsn(frm, vap);
2805 frm = ieee80211_add_xrates(frm, &ni->ni_rates);
2806 if (capinfo & IEEE80211_CAPINFO_SPECTRUM_MGMT) {
2807 frm = ieee80211_add_powercapability(frm,
2808 ic->ic_curchan);
2809 frm = ieee80211_add_supportedchannels(frm, ic);
2810 }
2811
2812 /*
2813 * Check the channel - we may be using an 11n NIC with an
2814 * 11n capable station, but we're configured to be an 11b
2815 * channel.
2816 */
2817 if ((vap->iv_flags_ht & IEEE80211_FHT_HT) &&
2818 IEEE80211_IS_CHAN_HT(ni->ni_chan) &&
2819 ni->ni_ies.htcap_ie != NULL &&
2820 ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_HTCAP) {
2821 frm = ieee80211_add_htcap(frm, ni);
2822 }
2823
2824 if ((vap->iv_flags_vht & IEEE80211_FVHT_VHT) &&
2825 IEEE80211_IS_CHAN_VHT(ni->ni_chan) &&
2826 ni->ni_ies.vhtcap_ie != NULL &&
2827 ni->ni_ies.vhtcap_ie[0] == IEEE80211_ELEMID_VHT_CAP) {
2828 frm = ieee80211_add_vhtcap(frm, ni);
2829 }
2830
2831 frm = ieee80211_add_wpa(frm, vap);
2832 if ((ic->ic_flags & IEEE80211_F_WME) &&
2833 ni->ni_ies.wme_ie != NULL)
2834 frm = ieee80211_add_wme_info(frm, &ic->ic_wme, ni);
2835
2836 /*
2837 * Same deal - only send HT info if we're on an 11n
2838 * capable channel.
2839 */
2840 if ((vap->iv_flags_ht & IEEE80211_FHT_HT) &&
2841 IEEE80211_IS_CHAN_HT(ni->ni_chan) &&
2842 ni->ni_ies.htcap_ie != NULL &&
2843 ni->ni_ies.htcap_ie[0] == IEEE80211_ELEMID_VENDOR) {
2844 frm = ieee80211_add_htcap_vendor(frm, ni);
2845 }
2846 #ifdef IEEE80211_SUPPORT_SUPERG
2847 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS)) {
2848 frm = ieee80211_add_ath(frm,
2849 IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS),
2850 ((vap->iv_flags & IEEE80211_F_WPA) == 0 &&
2851 ni->ni_authmode != IEEE80211_AUTH_8021X) ?
2852 vap->iv_def_txkey : IEEE80211_KEYIX_NONE);
2853 }
2854 #endif /* IEEE80211_SUPPORT_SUPERG */
2855 if (vap->iv_appie_assocreq != NULL)
2856 frm = add_appie(frm, vap->iv_appie_assocreq);
2857 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2858
2859 ieee80211_add_callback(m, ieee80211_tx_mgt_cb,
2860 (void *) vap->iv_state);
2861 break;
2862
2863 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2864 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2865 /*
2866 * asresp frame format
2867 * [2] capability information
2868 * [2] status
2869 * [2] association ID
2870 * [tlv] supported rates
2871 * [tlv] extended supported rates
2872 * [tlv] HT capabilities (standard, if STA enabled)
2873 * [tlv] HT information (standard, if STA enabled)
2874 * [tlv] VHT capabilities (standard, if STA enabled)
2875 * [tlv] VHT information (standard, if STA enabled)
2876 * [tlv] WME (if configured and STA enabled)
2877 * [tlv] HT capabilities (vendor OUI, if STA enabled)
2878 * [tlv] HT information (vendor OUI, if STA enabled)
2879 * [tlv] Atheros capabilities (if STA enabled)
2880 * [tlv] AppIE's (optional)
2881 */
2882 m = ieee80211_getmgtframe(&frm,
2883 ic->ic_headroom + sizeof(struct ieee80211_frame),
2884 sizeof(uint16_t)
2885 + sizeof(uint16_t)
2886 + sizeof(uint16_t)
2887 + 2 + IEEE80211_RATE_SIZE
2888 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2889 + sizeof(struct ieee80211_ie_htcap) + 4
2890 + sizeof(struct ieee80211_ie_htinfo) + 4
2891 + sizeof(struct ieee80211_ie_vhtcap)
2892 + sizeof(struct ieee80211_ie_vht_operation)
2893 + sizeof(struct ieee80211_wme_param)
2894 #ifdef IEEE80211_SUPPORT_SUPERG
2895 + sizeof(struct ieee80211_ath_ie)
2896 #endif
2897 + (vap->iv_appie_assocresp != NULL ?
2898 vap->iv_appie_assocresp->ie_len : 0)
2899 );
2900 if (m == NULL)
2901 senderr(ENOMEM, is_tx_nobuf);
2902
2903 capinfo = ieee80211_getcapinfo(vap, bss->ni_chan);
2904 *(uint16_t *)frm = htole16(capinfo);
2905 frm += 2;
2906
2907 *(uint16_t *)frm = htole16(arg); /* status */
2908 frm += 2;
2909
2910 if (arg == IEEE80211_STATUS_SUCCESS) {
2911 *(uint16_t *)frm = htole16(ni->ni_associd);
2912 IEEE80211_NODE_STAT(ni, tx_assoc);
2913 } else
2914 IEEE80211_NODE_STAT(ni, tx_assoc_fail);
2915 frm += 2;
2916
2917 frm = ieee80211_add_rates(frm, &ni->ni_rates);
2918 frm = ieee80211_add_xrates(frm, &ni->ni_rates);
2919 /* NB: respond according to what we received */
2920 if ((ni->ni_flags & HTFLAGS) == IEEE80211_NODE_HT) {
2921 frm = ieee80211_add_htcap(frm, ni);
2922 frm = ieee80211_add_htinfo(frm, ni);
2923 }
2924 if ((vap->iv_flags & IEEE80211_F_WME) &&
2925 ni->ni_ies.wme_ie != NULL)
2926 frm = ieee80211_add_wme_param(frm, &ic->ic_wme,
2927 !! (vap->iv_flags_ext & IEEE80211_FEXT_UAPSD));
2928 if ((ni->ni_flags & HTFLAGS) == HTFLAGS) {
2929 frm = ieee80211_add_htcap_vendor(frm, ni);
2930 frm = ieee80211_add_htinfo_vendor(frm, ni);
2931 }
2932 if (ni->ni_flags & IEEE80211_NODE_VHT) {
2933 frm = ieee80211_add_vhtcap(frm, ni);
2934 frm = ieee80211_add_vhtinfo(frm, ni);
2935 }
2936 #ifdef IEEE80211_SUPPORT_SUPERG
2937 if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS))
2938 frm = ieee80211_add_ath(frm,
2939 IEEE80211_ATH_CAP(vap, ni, IEEE80211_F_ATHEROS),
2940 ((vap->iv_flags & IEEE80211_F_WPA) == 0 &&
2941 ni->ni_authmode != IEEE80211_AUTH_8021X) ?
2942 vap->iv_def_txkey : IEEE80211_KEYIX_NONE);
2943 #endif /* IEEE80211_SUPPORT_SUPERG */
2944 if (vap->iv_appie_assocresp != NULL)
2945 frm = add_appie(frm, vap->iv_appie_assocresp);
2946 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2947 break;
2948
2949 case IEEE80211_FC0_SUBTYPE_DISASSOC:
2950 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
2951 "send station disassociate (reason: %d (%s))", arg,
2952 ieee80211_reason_to_string(arg));
2953 m = ieee80211_getmgtframe(&frm,
2954 ic->ic_headroom + sizeof(struct ieee80211_frame),
2955 sizeof(uint16_t));
2956 if (m == NULL)
2957 senderr(ENOMEM, is_tx_nobuf);
2958 *(uint16_t *)frm = htole16(arg); /* reason */
2959 m->m_pkthdr.len = m->m_len = sizeof(uint16_t);
2960
2961 IEEE80211_NODE_STAT(ni, tx_disassoc);
2962 IEEE80211_NODE_STAT_SET(ni, tx_disassoc_code, arg);
2963 break;
2964
2965 default:
2966 IEEE80211_NOTE(vap, IEEE80211_MSG_ANY, ni,
2967 "invalid mgmt frame type %u", type);
2968 senderr(EINVAL, is_tx_unknownmgt);
2969 /* NOTREACHED */
2970 }
2971
2972 /* NB: force non-ProbeResp frames to the highest queue */
2973 params.ibp_pri = WME_AC_VO;
2974 params.ibp_rate0 = bss->ni_txparms->mgmtrate;
2975 /* NB: we know all frames are unicast */
2976 params.ibp_try0 = bss->ni_txparms->maxretry;
2977 params.ibp_power = bss->ni_txpower;
2978 return ieee80211_mgmt_output(ni, m, type, ¶ms);
2979 bad:
2980 ieee80211_free_node(ni);
2981 return ret;
2982 #undef senderr
2983 #undef HTFLAGS
2984 }
2985
2986 /*
2987 * Return an mbuf with a probe response frame in it.
2988 * Space is left to prepend and 802.11 header at the
2989 * front but it's left to the caller to fill in.
2990 */
2991 struct mbuf *
2992 ieee80211_alloc_proberesp(struct ieee80211_node *bss, int legacy)
2993 {
2994 struct ieee80211vap *vap = bss->ni_vap;
2995 struct ieee80211com *ic = bss->ni_ic;
2996 const struct ieee80211_rateset *rs;
2997 struct mbuf *m;
2998 uint16_t capinfo;
2999 uint8_t *frm;
3000
3001 /*
3002 * probe response frame format
3003 * [8] time stamp
3004 * [2] beacon interval
3005 * [2] cabability information
3006 * [tlv] ssid
3007 * [tlv] supported rates
3008 * [tlv] parameter set (FH/DS)
3009 * [tlv] parameter set (IBSS)
3010 * [tlv] country (optional)
3011 * [3] power control (optional)
3012 * [5] channel switch announcement (CSA) (optional)
3013 * [tlv] extended rate phy (ERP)
3014 * [tlv] extended supported rates
3015 * [tlv] RSN (optional)
3016 * [tlv] HT capabilities
3017 * [tlv] HT information
3018 * [tlv] VHT capabilities
3019 * [tlv] VHT information
3020 * [tlv] WPA (optional)
3021 * [tlv] WME (optional)
3022 * [tlv] Vendor OUI HT capabilities (optional)
3023 * [tlv] Vendor OUI HT information (optional)
3024 * [tlv] Atheros capabilities
3025 * [tlv] AppIE's (optional)
3026 * [tlv] Mesh ID (MBSS)
3027 * [tlv] Mesh Conf (MBSS)
3028 */
3029 m = ieee80211_getmgtframe(&frm,
3030 ic->ic_headroom + sizeof(struct ieee80211_frame),
3031 8
3032 + sizeof(uint16_t)
3033 + sizeof(uint16_t)
3034 + 2 + IEEE80211_NWID_LEN
3035 + 2 + IEEE80211_RATE_SIZE
3036 + 7 /* max(7,3) */
3037 + IEEE80211_COUNTRY_MAX_SIZE
3038 + 3
3039 + sizeof(struct ieee80211_csa_ie)
3040 + sizeof(struct ieee80211_quiet_ie)
3041 + 3
3042 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
3043 + sizeof(struct ieee80211_ie_wpa)
3044 + sizeof(struct ieee80211_ie_htcap)
3045 + sizeof(struct ieee80211_ie_htinfo)
3046 + sizeof(struct ieee80211_ie_wpa)
3047 + sizeof(struct ieee80211_wme_param)
3048 + 4 + sizeof(struct ieee80211_ie_htcap)
3049 + 4 + sizeof(struct ieee80211_ie_htinfo)
3050 + sizeof(struct ieee80211_ie_vhtcap)
3051 + sizeof(struct ieee80211_ie_vht_operation)
3052 #ifdef IEEE80211_SUPPORT_SUPERG
3053 + sizeof(struct ieee80211_ath_ie)
3054 #endif
3055 #ifdef IEEE80211_SUPPORT_MESH
3056 + 2 + IEEE80211_MESHID_LEN
3057 + sizeof(struct ieee80211_meshconf_ie)
3058 #endif
3059 + (vap->iv_appie_proberesp != NULL ?
3060 vap->iv_appie_proberesp->ie_len : 0)
3061 );
3062 if (m == NULL) {
3063 vap->iv_stats.is_tx_nobuf++;
3064 return NULL;
3065 }
3066
3067 memset(frm, 0, 8); /* timestamp should be filled later */
3068 frm += 8;
3069 *(uint16_t *)frm = htole16(bss->ni_intval);
3070 frm += 2;
3071 capinfo = ieee80211_getcapinfo(vap, bss->ni_chan);
3072 *(uint16_t *)frm = htole16(capinfo);
3073 frm += 2;
3074
3075 frm = ieee80211_add_ssid(frm, bss->ni_essid, bss->ni_esslen);
3076 rs = ieee80211_get_suprates(ic, bss->ni_chan);
3077 frm = ieee80211_add_rates(frm, rs);
3078
3079 if (IEEE80211_IS_CHAN_FHSS(bss->ni_chan)) {
3080 *frm++ = IEEE80211_ELEMID_FHPARMS;
3081 *frm++ = 5;
3082 *frm++ = bss->ni_fhdwell & 0x00ff;
3083 *frm++ = (bss->ni_fhdwell >> 8) & 0x00ff;
3084 *frm++ = IEEE80211_FH_CHANSET(
3085 ieee80211_chan2ieee(ic, bss->ni_chan));
3086 *frm++ = IEEE80211_FH_CHANPAT(
3087 ieee80211_chan2ieee(ic, bss->ni_chan));
3088 *frm++ = bss->ni_fhindex;
3089 } else {
3090 *frm++ = IEEE80211_ELEMID_DSPARMS;
3091 *frm++ = 1;
3092 *frm++ = ieee80211_chan2ieee(ic, bss->ni_chan);
3093 }
3094
3095 if (vap->iv_opmode == IEEE80211_M_IBSS) {
3096 *frm++ = IEEE80211_ELEMID_IBSSPARMS;
3097 *frm++ = 2;
3098 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */
3099 }
3100 if ((vap->iv_flags & IEEE80211_F_DOTH) ||
3101 (vap->iv_flags_ext & IEEE80211_FEXT_DOTD))
3102 frm = ieee80211_add_countryie(frm, ic);
3103 if (vap->iv_flags & IEEE80211_F_DOTH) {
3104 if (IEEE80211_IS_CHAN_5GHZ(bss->ni_chan))
3105 frm = ieee80211_add_powerconstraint(frm, vap);
3106 if (ic->ic_flags & IEEE80211_F_CSAPENDING)
3107 frm = ieee80211_add_csa(frm, vap);
3108 }
3109 if (vap->iv_flags & IEEE80211_F_DOTH) {
3110 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) &&
3111 (vap->iv_flags_ext & IEEE80211_FEXT_DFS)) {
3112 if (vap->iv_quiet)
3113 frm = ieee80211_add_quiet(frm, vap, 0);
3114 }
3115 }
3116 if (IEEE80211_IS_CHAN_ANYG(bss->ni_chan))
3117 frm = ieee80211_add_erp(frm, vap);
3118 frm = ieee80211_add_xrates(frm, rs);
3119 frm = ieee80211_add_rsn(frm, vap);
3120 /*
3121 * NB: legacy 11b clients do not get certain ie's.
3122 * The caller identifies such clients by passing
3123 * a token in legacy to us. Could expand this to be
3124 * any legacy client for stuff like HT ie's.
3125 */
3126 if (IEEE80211_IS_CHAN_HT(bss->ni_chan) &&
3127 legacy != IEEE80211_SEND_LEGACY_11B) {
3128 frm = ieee80211_add_htcap(frm, bss);
3129 frm = ieee80211_add_htinfo(frm, bss);
3130 }
3131 if (IEEE80211_IS_CHAN_VHT(bss->ni_chan) &&
3132 legacy != IEEE80211_SEND_LEGACY_11B) {
3133 frm = ieee80211_add_vhtcap(frm, bss);
3134 frm = ieee80211_add_vhtinfo(frm, bss);
3135 }
3136 frm = ieee80211_add_wpa(frm, vap);
3137 if (vap->iv_flags & IEEE80211_F_WME)
3138 frm = ieee80211_add_wme_param(frm, &ic->ic_wme,
3139 !! (vap->iv_flags_ext & IEEE80211_FEXT_UAPSD));
3140 if (IEEE80211_IS_CHAN_HT(bss->ni_chan) &&
3141 (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) &&
3142 legacy != IEEE80211_SEND_LEGACY_11B) {
3143 frm = ieee80211_add_htcap_vendor(frm, bss);
3144 frm = ieee80211_add_htinfo_vendor(frm, bss);
3145 }
3146 #ifdef IEEE80211_SUPPORT_SUPERG
3147 if ((vap->iv_flags & IEEE80211_F_ATHEROS) &&
3148 legacy != IEEE80211_SEND_LEGACY_11B)
3149 frm = ieee80211_add_athcaps(frm, bss);
3150 #endif
3151 if (vap->iv_appie_proberesp != NULL)
3152 frm = add_appie(frm, vap->iv_appie_proberesp);
3153 #ifdef IEEE80211_SUPPORT_MESH
3154 if (vap->iv_opmode == IEEE80211_M_MBSS) {
3155 frm = ieee80211_add_meshid(frm, vap);
3156 frm = ieee80211_add_meshconf(frm, vap);
3157 }
3158 #endif
3159 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
3160
3161 return m;
3162 }
3163
3164 /*
3165 * Send a probe response frame to the specified mac address.
3166 * This does not go through the normal mgt frame api so we
3167 * can specify the destination address and re-use the bss node
3168 * for the sta reference.
3169 */
3170 int
3171 ieee80211_send_proberesp(struct ieee80211vap *vap,
3172 const uint8_t da[IEEE80211_ADDR_LEN], int legacy)
3173 {
3174 struct ieee80211_node *bss = vap->iv_bss;
3175 struct ieee80211com *ic = vap->iv_ic;
3176 struct mbuf *m;
3177 int ret;
3178
3179 if (vap->iv_state == IEEE80211_S_CAC) {
3180 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, bss,
3181 "block %s frame in CAC state", "probe response");
3182 vap->iv_stats.is_tx_badstate++;
3183 return EIO; /* XXX */
3184 }
3185
3186 /*
3187 * Hold a reference on the node so it doesn't go away until after
3188 * the xmit is complete all the way in the driver. On error we
3189 * will remove our reference.
3190 */
3191 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
3192 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n",
3193 __func__, __LINE__, bss, ether_sprintf(bss->ni_macaddr),
3194 ieee80211_node_refcnt(bss)+1);
3195 ieee80211_ref_node(bss);
3196
3197 m = ieee80211_alloc_proberesp(bss, legacy);
3198 if (m == NULL) {
3199 ieee80211_free_node(bss);
3200 return ENOMEM;
3201 }
3202
3203 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT);
3204 KASSERT(m != NULL, ("no room for header"));
3205
3206 IEEE80211_TX_LOCK(ic);
3207 ieee80211_send_setup(bss, m,
3208 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP,
3209 IEEE80211_NONQOS_TID, vap->iv_myaddr, da, bss->ni_bssid);
3210 /* XXX power management? */
3211 m->m_flags |= M_ENCAP; /* mark encapsulated */
3212
3213 M_WME_SETAC(m, WME_AC_BE);
3214
3215 IEEE80211_DPRINTF(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS,
3216 "send probe resp on channel %u to %s%s\n",
3217 ieee80211_chan2ieee(ic, ic->ic_curchan), ether_sprintf(da),
3218 legacy ? " <legacy>" : "");
3219 IEEE80211_NODE_STAT(bss, tx_mgmt);
3220
3221 ret = ieee80211_raw_output(vap, bss, m, NULL);
3222 IEEE80211_TX_UNLOCK(ic);
3223 return (ret);
3224 }
3225
3226 /*
3227 * Allocate and build a RTS (Request To Send) control frame.
3228 */
3229 struct mbuf *
3230 ieee80211_alloc_rts(struct ieee80211com *ic,
3231 const uint8_t ra[IEEE80211_ADDR_LEN],
3232 const uint8_t ta[IEEE80211_ADDR_LEN],
3233 uint16_t dur)
3234 {
3235 struct ieee80211_frame_rts *rts;
3236 struct mbuf *m;
3237
3238 /* XXX honor ic_headroom */
3239 m = m_gethdr(M_NOWAIT, MT_DATA);
3240 if (m != NULL) {
3241 rts = mtod(m, struct ieee80211_frame_rts *);
3242 rts->i_fc[0] = IEEE80211_FC0_VERSION_0 |
3243 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_RTS;
3244 rts->i_fc[1] = IEEE80211_FC1_DIR_NODS;
3245 *(u_int16_t *)rts->i_dur = htole16(dur);
3246 IEEE80211_ADDR_COPY(rts->i_ra, ra);
3247 IEEE80211_ADDR_COPY(rts->i_ta, ta);
3248
3249 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_rts);
3250 }
3251 return m;
3252 }
3253
3254 /*
3255 * Allocate and build a CTS (Clear To Send) control frame.
3256 */
3257 struct mbuf *
3258 ieee80211_alloc_cts(struct ieee80211com *ic,
3259 const uint8_t ra[IEEE80211_ADDR_LEN], uint16_t dur)
3260 {
3261 struct ieee80211_frame_cts *cts;
3262 struct mbuf *m;
3263
3264 /* XXX honor ic_headroom */
3265 m = m_gethdr(M_NOWAIT, MT_DATA);
3266 if (m != NULL) {
3267 cts = mtod(m, struct ieee80211_frame_cts *);
3268 cts->i_fc[0] = IEEE80211_FC0_VERSION_0 |
3269 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_CTS;
3270 cts->i_fc[1] = IEEE80211_FC1_DIR_NODS;
3271 *(u_int16_t *)cts->i_dur = htole16(dur);
3272 IEEE80211_ADDR_COPY(cts->i_ra, ra);
3273
3274 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_cts);
3275 }
3276 return m;
3277 }
3278
3279 /*
3280 * Wrapper for CTS/RTS frame allocation.
3281 */
3282 struct mbuf *
3283 ieee80211_alloc_prot(struct ieee80211_node *ni, const struct mbuf *m,
3284 uint8_t rate, int prot)
3285 {
3286 struct ieee80211com *ic = ni->ni_ic;
3287 struct ieee80211vap *vap = ni->ni_vap;
3288 const struct ieee80211_frame *wh;
3289 struct mbuf *mprot;
3290 uint16_t dur;
3291 int pktlen, isshort;
3292
3293 KASSERT(prot == IEEE80211_PROT_RTSCTS ||
3294 prot == IEEE80211_PROT_CTSONLY,
3295 ("wrong protection type %d", prot));
3296
3297 wh = mtod(m, const struct ieee80211_frame *);
3298 pktlen = m->m_pkthdr.len + IEEE80211_CRC_LEN;
3299 isshort = (vap->iv_flags & IEEE80211_F_SHPREAMBLE) != 0;
3300 dur = ieee80211_compute_duration(ic->ic_rt, pktlen, rate, isshort)
3301 + ieee80211_ack_duration(ic->ic_rt, rate, isshort);
3302
3303 if (prot == IEEE80211_PROT_RTSCTS) {
3304 /* NB: CTS is the same size as an ACK */
3305 dur += ieee80211_ack_duration(ic->ic_rt, rate, isshort);
3306 mprot = ieee80211_alloc_rts(ic, wh->i_addr1, wh->i_addr2, dur);
3307 } else
3308 mprot = ieee80211_alloc_cts(ic, vap->iv_myaddr, dur);
3309
3310 return (mprot);
3311 }
3312
3313 static void
3314 ieee80211_tx_mgt_timeout(void *arg)
3315 {
3316 struct ieee80211vap *vap = arg;
3317
3318 IEEE80211_LOCK(vap->iv_ic);
3319 if (vap->iv_state != IEEE80211_S_INIT &&
3320 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN) == 0) {
3321 /*
3322 * NB: it's safe to specify a timeout as the reason here;
3323 * it'll only be used in the right state.
3324 */
3325 ieee80211_new_state_locked(vap, IEEE80211_S_SCAN,
3326 IEEE80211_SCAN_FAIL_TIMEOUT);
3327 }
3328 IEEE80211_UNLOCK(vap->iv_ic);
3329 }
3330
3331 /*
3332 * This is the callback set on net80211-sourced transmitted
3333 * authentication request frames.
3334 *
3335 * This does a couple of things:
3336 *
3337 * + If the frame transmitted was a success, it schedules a future
3338 * event which will transition the interface to scan.
3339 * If a state transition _then_ occurs before that event occurs,
3340 * said state transition will cancel this callout.
3341 *
3342 * + If the frame transmit was a failure, it immediately schedules
3343 * the transition back to scan.
3344 */
3345 static void
3346 ieee80211_tx_mgt_cb(struct ieee80211_node *ni, void *arg, int status)
3347 {
3348 struct ieee80211vap *vap = ni->ni_vap;
3349 enum ieee80211_state ostate = (enum ieee80211_state)(uintptr_t)arg;
3350
3351 /*
3352 * Frame transmit completed; arrange timer callback. If
3353 * transmit was successfully we wait for response. Otherwise
3354 * we arrange an immediate callback instead of doing the
3355 * callback directly since we don't know what state the driver
3356 * is in (e.g. what locks it is holding). This work should
3357 * not be too time-critical and not happen too often so the
3358 * added overhead is acceptable.
3359 *
3360 * XXX what happens if !acked but response shows up before callback?
3361 */
3362 if (vap->iv_state == ostate) {
3363 callout_reset(&vap->iv_mgtsend,
3364 status == 0 ? IEEE80211_TRANS_WAIT*hz : 0,
3365 ieee80211_tx_mgt_timeout, vap);
3366 }
3367 }
3368
3369 static void
3370 ieee80211_beacon_construct(struct mbuf *m, uint8_t *frm,
3371 struct ieee80211_node *ni)
3372 {
3373 struct ieee80211vap *vap = ni->ni_vap;
3374 struct ieee80211_beacon_offsets *bo = &vap->iv_bcn_off;
3375 struct ieee80211com *ic = ni->ni_ic;
3376 struct ieee80211_rateset *rs = &ni->ni_rates;
3377 uint16_t capinfo;
3378
3379 /*
3380 * beacon frame format
3381 *
3382 * TODO: update to 802.11-2012; a lot of stuff has changed;
3383 * vendor extensions should be at the end, etc.
3384 *
3385 * [8] time stamp
3386 * [2] beacon interval
3387 * [2] cabability information
3388 * [tlv] ssid
3389 * [tlv] supported rates
3390 * [3] parameter set (DS)
3391 * [8] CF parameter set (optional)
3392 * [tlv] parameter set (IBSS/TIM)
3393 * [tlv] country (optional)
3394 * [3] power control (optional)
3395 * [5] channel switch announcement (CSA) (optional)
3396 * XXX TODO: Quiet
3397 * XXX TODO: IBSS DFS
3398 * XXX TODO: TPC report
3399 * [tlv] extended rate phy (ERP)
3400 * [tlv] extended supported rates
3401 * [tlv] RSN parameters
3402 * XXX TODO: BSSLOAD
3403 * (XXX EDCA parameter set, QoS capability?)
3404 * XXX TODO: AP channel report
3405 *
3406 * [tlv] HT capabilities
3407 * [tlv] HT information
3408 * XXX TODO: 20/40 BSS coexistence
3409 * Mesh:
3410 * XXX TODO: Meshid
3411 * XXX TODO: mesh config
3412 * XXX TODO: mesh awake window
3413 * XXX TODO: beacon timing (mesh, etc)
3414 * XXX TODO: MCCAOP Advertisement Overview
3415 * XXX TODO: MCCAOP Advertisement
3416 * XXX TODO: Mesh channel switch parameters
3417 * VHT:
3418 * XXX TODO: VHT capabilities
3419 * XXX TODO: VHT operation
3420 * XXX TODO: VHT transmit power envelope
3421 * XXX TODO: channel switch wrapper element
3422 * XXX TODO: extended BSS load element
3423 *
3424 * XXX Vendor-specific OIDs (e.g. Atheros)
3425 * [tlv] WPA parameters
3426 * [tlv] WME parameters
3427 * [tlv] Vendor OUI HT capabilities (optional)
3428 * [tlv] Vendor OUI HT information (optional)
3429 * [tlv] Atheros capabilities (optional)
3430 * [tlv] TDMA parameters (optional)
3431 * [tlv] Mesh ID (MBSS)
3432 * [tlv] Mesh Conf (MBSS)
3433 * [tlv] application data (optional)
3434 */
3435
3436 memset(bo, 0, sizeof(*bo));
3437
3438 memset(frm, 0, 8); /* XXX timestamp is set by hardware/driver */
3439 frm += 8;
3440 *(uint16_t *)frm = htole16(ni->ni_intval);
3441 frm += 2;
3442 capinfo = ieee80211_getcapinfo(vap, ni->ni_chan);
3443 bo->bo_caps = (uint16_t *)frm;
3444 *(uint16_t *)frm = htole16(capinfo);
3445 frm += 2;
3446 *frm++ = IEEE80211_ELEMID_SSID;
3447 if ((vap->iv_flags & IEEE80211_F_HIDESSID) == 0) {
3448 *frm++ = ni->ni_esslen;
3449 memcpy(frm, ni->ni_essid, ni->ni_esslen);
3450 frm += ni->ni_esslen;
3451 } else
3452 *frm++ = 0;
3453 frm = ieee80211_add_rates(frm, rs);
3454 if (!IEEE80211_IS_CHAN_FHSS(ni->ni_chan)) {
3455 *frm++ = IEEE80211_ELEMID_DSPARMS;
3456 *frm++ = 1;
3457 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan);
3458 }
3459 if (ic->ic_flags & IEEE80211_F_PCF) {
3460 bo->bo_cfp = frm;
3461 frm = ieee80211_add_cfparms(frm, ic);
3462 }
3463 bo->bo_tim = frm;
3464 if (vap->iv_opmode == IEEE80211_M_IBSS) {
3465 *frm++ = IEEE80211_ELEMID_IBSSPARMS;
3466 *frm++ = 2;
3467 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */
3468 bo->bo_tim_len = 0;
3469 } else if (vap->iv_opmode == IEEE80211_M_HOSTAP ||
3470 vap->iv_opmode == IEEE80211_M_MBSS) {
3471 /* TIM IE is the same for Mesh and Hostap */
3472 struct ieee80211_tim_ie *tie = (struct ieee80211_tim_ie *) frm;
3473
3474 tie->tim_ie = IEEE80211_ELEMID_TIM;
3475 tie->tim_len = 4; /* length */
3476 tie->tim_count = 0; /* DTIM count */
3477 tie->tim_period = vap->iv_dtim_period; /* DTIM period */
3478 tie->tim_bitctl = 0; /* bitmap control */
3479 tie->tim_bitmap[0] = 0; /* Partial Virtual Bitmap */
3480 frm += sizeof(struct ieee80211_tim_ie);
3481 bo->bo_tim_len = 1;
3482 }
3483 bo->bo_tim_trailer = frm;
3484 if ((vap->iv_flags & IEEE80211_F_DOTH) ||
3485 (vap->iv_flags_ext & IEEE80211_FEXT_DOTD))
3486 frm = ieee80211_add_countryie(frm, ic);
3487 if (vap->iv_flags & IEEE80211_F_DOTH) {
3488 if (IEEE80211_IS_CHAN_5GHZ(ni->ni_chan))
3489 frm = ieee80211_add_powerconstraint(frm, vap);
3490 bo->bo_csa = frm;
3491 if (ic->ic_flags & IEEE80211_F_CSAPENDING)
3492 frm = ieee80211_add_csa(frm, vap);
3493 } else
3494 bo->bo_csa = frm;
3495
3496 bo->bo_quiet = NULL;
3497 if (vap->iv_flags & IEEE80211_F_DOTH) {
3498 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) &&
3499 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) &&
3500 (vap->iv_quiet == 1)) {
3501 /*
3502 * We only insert the quiet IE offset if
3503 * the quiet IE is enabled. Otherwise don't
3504 * put it here or we'll just overwrite
3505 * some other beacon contents.
3506 */
3507 if (vap->iv_quiet) {
3508 bo->bo_quiet = frm;
3509 frm = ieee80211_add_quiet(frm,vap, 0);
3510 }
3511 }
3512 }
3513
3514 if (IEEE80211_IS_CHAN_ANYG(ni->ni_chan)) {
3515 bo->bo_erp = frm;
3516 frm = ieee80211_add_erp(frm, vap);
3517 }
3518 frm = ieee80211_add_xrates(frm, rs);
3519 frm = ieee80211_add_rsn(frm, vap);
3520 if (IEEE80211_IS_CHAN_HT(ni->ni_chan)) {
3521 frm = ieee80211_add_htcap(frm, ni);
3522 bo->bo_htinfo = frm;
3523 frm = ieee80211_add_htinfo(frm, ni);
3524 }
3525
3526 if (IEEE80211_IS_CHAN_VHT(ni->ni_chan)) {
3527 frm = ieee80211_add_vhtcap(frm, ni);
3528 bo->bo_vhtinfo = frm;
3529 frm = ieee80211_add_vhtinfo(frm, ni);
3530 /* Transmit power envelope */
3531 /* Channel switch wrapper element */
3532 /* Extended bss load element */
3533 }
3534
3535 frm = ieee80211_add_wpa(frm, vap);
3536 if (vap->iv_flags & IEEE80211_F_WME) {
3537 bo->bo_wme = frm;
3538 frm = ieee80211_add_wme_param(frm, &ic->ic_wme,
3539 !! (vap->iv_flags_ext & IEEE80211_FEXT_UAPSD));
3540 }
3541 if (IEEE80211_IS_CHAN_HT(ni->ni_chan) &&
3542 (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT)) {
3543 frm = ieee80211_add_htcap_vendor(frm, ni);
3544 frm = ieee80211_add_htinfo_vendor(frm, ni);
3545 }
3546
3547 #ifdef IEEE80211_SUPPORT_SUPERG
3548 if (vap->iv_flags & IEEE80211_F_ATHEROS) {
3549 bo->bo_ath = frm;
3550 frm = ieee80211_add_athcaps(frm, ni);
3551 }
3552 #endif
3553 #ifdef IEEE80211_SUPPORT_TDMA
3554 if (vap->iv_caps & IEEE80211_C_TDMA) {
3555 bo->bo_tdma = frm;
3556 frm = ieee80211_add_tdma(frm, vap);
3557 }
3558 #endif
3559 if (vap->iv_appie_beacon != NULL) {
3560 bo->bo_appie = frm;
3561 bo->bo_appie_len = vap->iv_appie_beacon->ie_len;
3562 frm = add_appie(frm, vap->iv_appie_beacon);
3563 }
3564
3565 /* XXX TODO: move meshid/meshconf up to before vendor extensions? */
3566 #ifdef IEEE80211_SUPPORT_MESH
3567 if (vap->iv_opmode == IEEE80211_M_MBSS) {
3568 frm = ieee80211_add_meshid(frm, vap);
3569 bo->bo_meshconf = frm;
3570 frm = ieee80211_add_meshconf(frm, vap);
3571 }
3572 #endif
3573 bo->bo_tim_trailer_len = frm - bo->bo_tim_trailer;
3574 bo->bo_csa_trailer_len = frm - bo->bo_csa;
3575 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
3576 }
3577
3578 /*
3579 * Allocate a beacon frame and fillin the appropriate bits.
3580 */
3581 struct mbuf *
3582 ieee80211_beacon_alloc(struct ieee80211_node *ni)
3583 {
3584 struct ieee80211vap *vap = ni->ni_vap;
3585 struct ieee80211com *ic = ni->ni_ic;
3586 struct ifnet *ifp = vap->iv_ifp;
3587 struct ieee80211_frame *wh;
3588 struct mbuf *m;
3589 int pktlen;
3590 uint8_t *frm;
3591
3592 /*
3593 * Update the "We're putting the quiet IE in the beacon" state.
3594 */
3595 if (vap->iv_quiet == 1)
3596 vap->iv_flags_ext |= IEEE80211_FEXT_QUIET_IE;
3597 else if (vap->iv_quiet == 0)
3598 vap->iv_flags_ext &= ~IEEE80211_FEXT_QUIET_IE;
3599
3600 /*
3601 * beacon frame format
3602 *
3603 * Note: This needs updating for 802.11-2012.
3604 *
3605 * [8] time stamp
3606 * [2] beacon interval
3607 * [2] cabability information
3608 * [tlv] ssid
3609 * [tlv] supported rates
3610 * [3] parameter set (DS)
3611 * [8] CF parameter set (optional)
3612 * [tlv] parameter set (IBSS/TIM)
3613 * [tlv] country (optional)
3614 * [3] power control (optional)
3615 * [5] channel switch announcement (CSA) (optional)
3616 * [tlv] extended rate phy (ERP)
3617 * [tlv] extended supported rates
3618 * [tlv] RSN parameters
3619 * [tlv] HT capabilities
3620 * [tlv] HT information
3621 * [tlv] VHT capabilities
3622 * [tlv] VHT operation
3623 * [tlv] Vendor OUI HT capabilities (optional)
3624 * [tlv] Vendor OUI HT information (optional)
3625 * XXX Vendor-specific OIDs (e.g. Atheros)
3626 * [tlv] WPA parameters
3627 * [tlv] WME parameters
3628 * [tlv] TDMA parameters (optional)
3629 * [tlv] Mesh ID (MBSS)
3630 * [tlv] Mesh Conf (MBSS)
3631 * [tlv] application data (optional)
3632 * NB: we allocate the max space required for the TIM bitmap.
3633 * XXX how big is this?
3634 */
3635 pktlen = 8 /* time stamp */
3636 + sizeof(uint16_t) /* beacon interval */
3637 + sizeof(uint16_t) /* capabilities */
3638 + 2 + ni->ni_esslen /* ssid */
3639 + 2 + IEEE80211_RATE_SIZE /* supported rates */
3640 + 2 + 1 /* DS parameters */
3641 + 2 + 6 /* CF parameters */
3642 + 2 + 4 + vap->iv_tim_len /* DTIM/IBSSPARMS */
3643 + IEEE80211_COUNTRY_MAX_SIZE /* country */
3644 + 2 + 1 /* power control */
3645 + sizeof(struct ieee80211_csa_ie) /* CSA */
3646 + sizeof(struct ieee80211_quiet_ie) /* Quiet */
3647 + 2 + 1 /* ERP */
3648 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
3649 + (vap->iv_caps & IEEE80211_C_WPA ? /* WPA 1+2 */
3650 2*sizeof(struct ieee80211_ie_wpa) : 0)
3651 /* XXX conditional? */
3652 + 4+2*sizeof(struct ieee80211_ie_htcap)/* HT caps */
3653 + 4+2*sizeof(struct ieee80211_ie_htinfo)/* HT info */
3654 + sizeof(struct ieee80211_ie_vhtcap)/* VHT caps */
3655 + sizeof(struct ieee80211_ie_vht_operation)/* VHT info */
3656 + (vap->iv_caps & IEEE80211_C_WME ? /* WME */
3657 sizeof(struct ieee80211_wme_param) : 0)
3658 #ifdef IEEE80211_SUPPORT_SUPERG
3659 + sizeof(struct ieee80211_ath_ie) /* ATH */
3660 #endif
3661 #ifdef IEEE80211_SUPPORT_TDMA
3662 + (vap->iv_caps & IEEE80211_C_TDMA ? /* TDMA */
3663 sizeof(struct ieee80211_tdma_param) : 0)
3664 #endif
3665 #ifdef IEEE80211_SUPPORT_MESH
3666 + 2 + ni->ni_meshidlen
3667 + sizeof(struct ieee80211_meshconf_ie)
3668 #endif
3669 + IEEE80211_MAX_APPIE
3670 ;
3671 m = ieee80211_getmgtframe(&frm,
3672 ic->ic_headroom + sizeof(struct ieee80211_frame), pktlen);
3673 if (m == NULL) {
3674 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
3675 "%s: cannot get buf; size %u\n", __func__, pktlen);
3676 vap->iv_stats.is_tx_nobuf++;
3677 return NULL;
3678 }
3679 ieee80211_beacon_construct(m, frm, ni);
3680
3681 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT);
3682 KASSERT(m != NULL, ("no space for 802.11 header?"));
3683 wh = mtod(m, struct ieee80211_frame *);
3684 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT |
3685 IEEE80211_FC0_SUBTYPE_BEACON;
3686 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
3687 *(uint16_t *)wh->i_dur = 0;
3688 IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr);
3689 IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr);
3690 IEEE80211_ADDR_COPY(wh->i_addr3, ni->ni_bssid);
3691 *(uint16_t *)wh->i_seq = 0;
3692
3693 return m;
3694 }
3695
3696 /*
3697 * Update the dynamic parts of a beacon frame based on the current state.
3698 */
3699 int
3700 ieee80211_beacon_update(struct ieee80211_node *ni, struct mbuf *m, int mcast)
3701 {
3702 struct ieee80211vap *vap = ni->ni_vap;
3703 struct ieee80211_beacon_offsets *bo = &vap->iv_bcn_off;
3704 struct ieee80211com *ic = ni->ni_ic;
3705 int len_changed = 0;
3706 uint16_t capinfo;
3707 struct ieee80211_frame *wh;
3708 ieee80211_seq seqno;
3709
3710 IEEE80211_LOCK(ic);
3711 /*
3712 * Handle 11h channel change when we've reached the count.
3713 * We must recalculate the beacon frame contents to account
3714 * for the new channel. Note we do this only for the first
3715 * vap that reaches this point; subsequent vaps just update
3716 * their beacon state to reflect the recalculated channel.
3717 */
3718 if (isset(bo->bo_flags, IEEE80211_BEACON_CSA) &&
3719 vap->iv_csa_count == ic->ic_csa_count) {
3720 vap->iv_csa_count = 0;
3721 /*
3722 * Effect channel change before reconstructing the beacon
3723 * frame contents as many places reference ni_chan.
3724 */
3725 if (ic->ic_csa_newchan != NULL)
3726 ieee80211_csa_completeswitch(ic);
3727 /*
3728 * NB: ieee80211_beacon_construct clears all pending
3729 * updates in bo_flags so we don't need to explicitly
3730 * clear IEEE80211_BEACON_CSA.
3731 */
3732 ieee80211_beacon_construct(m,
3733 mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), ni);
3734
3735 /* XXX do WME aggressive mode processing? */
3736 IEEE80211_UNLOCK(ic);
3737 return 1; /* just assume length changed */
3738 }
3739
3740 /*
3741 * Handle the quiet time element being added and removed.
3742 * Again, for now we just cheat and reconstruct the whole
3743 * beacon - that way the gap is provided as appropriate.
3744 *
3745 * So, track whether we have already added the IE versus
3746 * whether we want to be adding the IE.
3747 */
3748 if ((vap->iv_flags_ext & IEEE80211_FEXT_QUIET_IE) &&
3749 (vap->iv_quiet == 0)) {
3750 /*
3751 * Quiet time beacon IE enabled, but it's disabled;
3752 * recalc
3753 */
3754 vap->iv_flags_ext &= ~IEEE80211_FEXT_QUIET_IE;
3755 ieee80211_beacon_construct(m,
3756 mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), ni);
3757 /* XXX do WME aggressive mode processing? */
3758 IEEE80211_UNLOCK(ic);
3759 return 1; /* just assume length changed */
3760 }
3761
3762 if (((vap->iv_flags_ext & IEEE80211_FEXT_QUIET_IE) == 0) &&
3763 (vap->iv_quiet == 1)) {
3764 /*
3765 * Quiet time beacon IE disabled, but it's now enabled;
3766 * recalc
3767 */
3768 vap->iv_flags_ext |= IEEE80211_FEXT_QUIET_IE;
3769 ieee80211_beacon_construct(m,
3770 mtod(m, uint8_t*) + sizeof(struct ieee80211_frame), ni);
3771 /* XXX do WME aggressive mode processing? */
3772 IEEE80211_UNLOCK(ic);
3773 return 1; /* just assume length changed */
3774 }
3775
3776 wh = mtod(m, struct ieee80211_frame *);
3777
3778 /*
3779 * XXX TODO Strictly speaking this should be incremented with the TX
3780 * lock held so as to serialise access to the non-qos TID sequence
3781 * number space.
3782 *
3783 * If the driver identifies it does its own TX seqno management then
3784 * we can skip this (and still not do the TX seqno.)
3785 */
3786 seqno = ni->ni_txseqs[IEEE80211_NONQOS_TID]++;
3787 *(uint16_t *)&wh->i_seq[0] =
3788 htole16(seqno << IEEE80211_SEQ_SEQ_SHIFT);
3789 M_SEQNO_SET(m, seqno);
3790
3791 /* XXX faster to recalculate entirely or just changes? */
3792 capinfo = ieee80211_getcapinfo(vap, ni->ni_chan);
3793 *bo->bo_caps = htole16(capinfo);
3794
3795 if (vap->iv_flags & IEEE80211_F_WME) {
3796 struct ieee80211_wme_state *wme = &ic->ic_wme;
3797
3798 /*
3799 * Check for aggressive mode change. When there is
3800 * significant high priority traffic in the BSS
3801 * throttle back BE traffic by using conservative
3802 * parameters. Otherwise BE uses aggressive params
3803 * to optimize performance of legacy/non-QoS traffic.
3804 */
3805 if (wme->wme_flags & WME_F_AGGRMODE) {
3806 if (wme->wme_hipri_traffic >
3807 wme->wme_hipri_switch_thresh) {
3808 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
3809 "%s: traffic %u, disable aggressive mode\n",
3810 __func__, wme->wme_hipri_traffic);
3811 wme->wme_flags &= ~WME_F_AGGRMODE;
3812 ieee80211_wme_updateparams_locked(vap);
3813 wme->wme_hipri_traffic =
3814 wme->wme_hipri_switch_hysteresis;
3815 } else
3816 wme->wme_hipri_traffic = 0;
3817 } else {
3818 if (wme->wme_hipri_traffic <=
3819 wme->wme_hipri_switch_thresh) {
3820 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
3821 "%s: traffic %u, enable aggressive mode\n",
3822 __func__, wme->wme_hipri_traffic);
3823 wme->wme_flags |= WME_F_AGGRMODE;
3824 ieee80211_wme_updateparams_locked(vap);
3825 wme->wme_hipri_traffic = 0;
3826 } else
3827 wme->wme_hipri_traffic =
3828 wme->wme_hipri_switch_hysteresis;
3829 }
3830 if (isset(bo->bo_flags, IEEE80211_BEACON_WME)) {
3831 (void) ieee80211_add_wme_param(bo->bo_wme, wme,
3832 vap->iv_flags_ext & IEEE80211_FEXT_UAPSD);
3833 clrbit(bo->bo_flags, IEEE80211_BEACON_WME);
3834 }
3835 }
3836
3837 if (isset(bo->bo_flags, IEEE80211_BEACON_HTINFO)) {
3838 ieee80211_ht_update_beacon(vap, bo);
3839 clrbit(bo->bo_flags, IEEE80211_BEACON_HTINFO);
3840 }
3841 #ifdef IEEE80211_SUPPORT_TDMA
3842 if (vap->iv_caps & IEEE80211_C_TDMA) {
3843 /*
3844 * NB: the beacon is potentially updated every TBTT.
3845 */
3846 ieee80211_tdma_update_beacon(vap, bo);
3847 }
3848 #endif
3849 #ifdef IEEE80211_SUPPORT_MESH
3850 if (vap->iv_opmode == IEEE80211_M_MBSS)
3851 ieee80211_mesh_update_beacon(vap, bo);
3852 #endif
3853
3854 if (vap->iv_opmode == IEEE80211_M_HOSTAP ||
3855 vap->iv_opmode == IEEE80211_M_MBSS) { /* NB: no IBSS support*/
3856 struct ieee80211_tim_ie *tie =
3857 (struct ieee80211_tim_ie *) bo->bo_tim;
3858 if (isset(bo->bo_flags, IEEE80211_BEACON_TIM)) {
3859 u_int timlen, timoff, i;
3860 /*
3861 * ATIM/DTIM needs updating. If it fits in the
3862 * current space allocated then just copy in the
3863 * new bits. Otherwise we need to move any trailing
3864 * data to make room. Note that we know there is
3865 * contiguous space because ieee80211_beacon_allocate
3866 * insures there is space in the mbuf to write a
3867 * maximal-size virtual bitmap (based on iv_max_aid).
3868 */
3869 /*
3870 * Calculate the bitmap size and offset, copy any
3871 * trailer out of the way, and then copy in the
3872 * new bitmap and update the information element.
3873 * Note that the tim bitmap must contain at least
3874 * one byte and any offset must be even.
3875 */
3876 if (vap->iv_ps_pending != 0) {
3877 timoff = 128; /* impossibly large */
3878 for (i = 0; i < vap->iv_tim_len; i++)
3879 if (vap->iv_tim_bitmap[i]) {
3880 timoff = i &~ 1;
3881 break;
3882 }
3883 KASSERT(timoff != 128, ("tim bitmap empty!"));
3884 for (i = vap->iv_tim_len-1; i >= timoff; i--)
3885 if (vap->iv_tim_bitmap[i])
3886 break;
3887 timlen = 1 + (i - timoff);
3888 } else {
3889 timoff = 0;
3890 timlen = 1;
3891 }
3892
3893 /*
3894 * TODO: validate this!
3895 */
3896 if (timlen != bo->bo_tim_len) {
3897 /* copy up/down trailer */
3898 int adjust = tie->tim_bitmap+timlen
3899 - bo->bo_tim_trailer;
3900 ovbcopy(bo->bo_tim_trailer,
3901 bo->bo_tim_trailer+adjust,
3902 bo->bo_tim_trailer_len);
3903 bo->bo_tim_trailer += adjust;
3904 bo->bo_erp += adjust;
3905 bo->bo_htinfo += adjust;
3906 bo->bo_vhtinfo += adjust;
3907 #ifdef IEEE80211_SUPPORT_SUPERG
3908 bo->bo_ath += adjust;
3909 #endif
3910 #ifdef IEEE80211_SUPPORT_TDMA
3911 bo->bo_tdma += adjust;
3912 #endif
3913 #ifdef IEEE80211_SUPPORT_MESH
3914 bo->bo_meshconf += adjust;
3915 #endif
3916 bo->bo_appie += adjust;
3917 bo->bo_wme += adjust;
3918 bo->bo_csa += adjust;
3919 bo->bo_quiet += adjust;
3920 bo->bo_tim_len = timlen;
3921
3922 /* update information element */
3923 tie->tim_len = 3 + timlen;
3924 tie->tim_bitctl = timoff;
3925 len_changed = 1;
3926 }
3927 memcpy(tie->tim_bitmap, vap->iv_tim_bitmap + timoff,
3928 bo->bo_tim_len);
3929
3930 clrbit(bo->bo_flags, IEEE80211_BEACON_TIM);
3931
3932 IEEE80211_DPRINTF(vap, IEEE80211_MSG_POWER,
3933 "%s: TIM updated, pending %u, off %u, len %u\n",
3934 __func__, vap->iv_ps_pending, timoff, timlen);
3935 }
3936 /* count down DTIM period */
3937 if (tie->tim_count == 0)
3938 tie->tim_count = tie->tim_period - 1;
3939 else
3940 tie->tim_count--;
3941 /* update state for buffered multicast frames on DTIM */
3942 if (mcast && tie->tim_count == 0)
3943 tie->tim_bitctl |= 1;
3944 else
3945 tie->tim_bitctl &= ~1;
3946 if (isset(bo->bo_flags, IEEE80211_BEACON_CSA)) {
3947 struct ieee80211_csa_ie *csa =
3948 (struct ieee80211_csa_ie *) bo->bo_csa;
3949
3950 /*
3951 * Insert or update CSA ie. If we're just starting
3952 * to count down to the channel switch then we need
3953 * to insert the CSA ie. Otherwise we just need to
3954 * drop the count. The actual change happens above
3955 * when the vap's count reaches the target count.
3956 */
3957 if (vap->iv_csa_count == 0) {
3958 memmove(&csa[1], csa, bo->bo_csa_trailer_len);
3959 bo->bo_erp += sizeof(*csa);
3960 bo->bo_htinfo += sizeof(*csa);
3961 bo->bo_vhtinfo += sizeof(*csa);
3962 bo->bo_wme += sizeof(*csa);
3963 #ifdef IEEE80211_SUPPORT_SUPERG
3964 bo->bo_ath += sizeof(*csa);
3965 #endif
3966 #ifdef IEEE80211_SUPPORT_TDMA
3967 bo->bo_tdma += sizeof(*csa);
3968 #endif
3969 #ifdef IEEE80211_SUPPORT_MESH
3970 bo->bo_meshconf += sizeof(*csa);
3971 #endif
3972 bo->bo_appie += sizeof(*csa);
3973 bo->bo_csa_trailer_len += sizeof(*csa);
3974 bo->bo_quiet += sizeof(*csa);
3975 bo->bo_tim_trailer_len += sizeof(*csa);
3976 m->m_len += sizeof(*csa);
3977 m->m_pkthdr.len += sizeof(*csa);
3978
3979 ieee80211_add_csa(bo->bo_csa, vap);
3980 } else
3981 csa->csa_count--;
3982 vap->iv_csa_count++;
3983 /* NB: don't clear IEEE80211_BEACON_CSA */
3984 }
3985
3986 /*
3987 * Only add the quiet time IE if we've enabled it
3988 * as appropriate.
3989 */
3990 if (IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) &&
3991 (vap->iv_flags_ext & IEEE80211_FEXT_DFS)) {
3992 if (vap->iv_quiet &&
3993 (vap->iv_flags_ext & IEEE80211_FEXT_QUIET_IE)) {
3994 ieee80211_add_quiet(bo->bo_quiet, vap, 1);
3995 }
3996 }
3997 if (isset(bo->bo_flags, IEEE80211_BEACON_ERP)) {
3998 /*
3999 * ERP element needs updating.
4000 */
4001 (void) ieee80211_add_erp(bo->bo_erp, vap);
4002 clrbit(bo->bo_flags, IEEE80211_BEACON_ERP);
4003 }
4004 #ifdef IEEE80211_SUPPORT_SUPERG
4005 if (isset(bo->bo_flags, IEEE80211_BEACON_ATH)) {
4006 ieee80211_add_athcaps(bo->bo_ath, ni);
4007 clrbit(bo->bo_flags, IEEE80211_BEACON_ATH);
4008 }
4009 #endif
4010 }
4011 if (isset(bo->bo_flags, IEEE80211_BEACON_APPIE)) {
4012 const struct ieee80211_appie *aie = vap->iv_appie_beacon;
4013 int aielen;
4014 uint8_t *frm;
4015
4016 aielen = 0;
4017 if (aie != NULL)
4018 aielen += aie->ie_len;
4019 if (aielen != bo->bo_appie_len) {
4020 /* copy up/down trailer */
4021 int adjust = aielen - bo->bo_appie_len;
4022 ovbcopy(bo->bo_tim_trailer, bo->bo_tim_trailer+adjust,
4023 bo->bo_tim_trailer_len);
4024 bo->bo_tim_trailer += adjust;
4025 bo->bo_appie += adjust;
4026 bo->bo_appie_len = aielen;
4027
4028 len_changed = 1;
4029 }
4030 frm = bo->bo_appie;
4031 if (aie != NULL)
4032 frm = add_appie(frm, aie);
4033 clrbit(bo->bo_flags, IEEE80211_BEACON_APPIE);
4034 }
4035 IEEE80211_UNLOCK(ic);
4036
4037 return len_changed;
4038 }
4039
4040 /*
4041 * Do Ethernet-LLC encapsulation for each payload in a fast frame
4042 * tunnel encapsulation. The frame is assumed to have an Ethernet
4043 * header at the front that must be stripped before prepending the
4044 * LLC followed by the Ethernet header passed in (with an Ethernet
4045 * type that specifies the payload size).
4046 */
4047 struct mbuf *
4048 ieee80211_ff_encap1(struct ieee80211vap *vap, struct mbuf *m,
4049 const struct ether_header *eh)
4050 {
4051 struct llc *llc;
4052 uint16_t payload;
4053
4054 /* XXX optimize by combining m_adj+M_PREPEND */
4055 m_adj(m, sizeof(struct ether_header) - sizeof(struct llc));
4056 llc = mtod(m, struct llc *);
4057 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP;
4058 llc->llc_control = LLC_UI;
4059 llc->llc_snap.org_code[0] = 0;
4060 llc->llc_snap.org_code[1] = 0;
4061 llc->llc_snap.org_code[2] = 0;
4062 llc->llc_snap.ether_type = eh->ether_type;
4063 payload = m->m_pkthdr.len; /* NB: w/o Ethernet header */
4064
4065 M_PREPEND(m, sizeof(struct ether_header), M_NOWAIT);
4066 if (m == NULL) { /* XXX cannot happen */
4067 IEEE80211_DPRINTF(vap, IEEE80211_MSG_SUPERG,
4068 "%s: no space for ether_header\n", __func__);
4069 vap->iv_stats.is_tx_nobuf++;
4070 return NULL;
4071 }
4072 ETHER_HEADER_COPY(mtod(m, void *), eh);
4073 mtod(m, struct ether_header *)->ether_type = htons(payload);
4074 return m;
4075 }
4076
4077 /*
4078 * Complete an mbuf transmission.
4079 *
4080 * For now, this simply processes a completed frame after the
4081 * driver has completed it's transmission and/or retransmission.
4082 * It assumes the frame is an 802.11 encapsulated frame.
4083 *
4084 * Later on it will grow to become the exit path for a given frame
4085 * from the driver and, depending upon how it's been encapsulated
4086 * and already transmitted, it may end up doing A-MPDU retransmission,
4087 * power save requeuing, etc.
4088 *
4089 * In order for the above to work, the driver entry point to this
4090 * must not hold any driver locks. Thus, the driver needs to delay
4091 * any actual mbuf completion until it can release said locks.
4092 *
4093 * This frees the mbuf and if the mbuf has a node reference,
4094 * the node reference will be freed.
4095 */
4096 void
4097 ieee80211_tx_complete(struct ieee80211_node *ni, struct mbuf *m, int status)
4098 {
4099
4100 if (ni != NULL) {
4101 struct ifnet *ifp = ni->ni_vap->iv_ifp;
4102
4103 if (status == 0) {
4104 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len);
4105 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
4106 if (m->m_flags & M_MCAST)
4107 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1);
4108 } else
4109 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
4110 if (m->m_flags & M_TXCB)
4111 ieee80211_process_callback(ni, m, status);
4112 ieee80211_free_node(ni);
4113 }
4114 m_freem(m);
4115 }
Cache object: 2fe597ca7616d60c13a448c9a46b5afe
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