Correct TU <-> millisecond and TU -> ticks convertion.
[dragonfly.git] / sys / netproto / 802_11 / wlan / ieee80211_output.c
CommitLineData
f186073c
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1/*
2 * Copyright (c) 2001 Atsushi Onoe
841ab66c 3 * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
f186073c
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4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * Alternatively, this software may be distributed under the terms of the
18 * GNU General Public License ("GPL") version 2 as published by the Free
19 * Software Foundation.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 *
5d004897 32 * $FreeBSD: src/sys/net80211/ieee80211_output.c,v 1.26.2.8 2006/09/02 15:06:04 sam Exp $
34b861de 33 * $DragonFly: src/sys/netproto/802_11/wlan/ieee80211_output.c,v 1.15 2007/03/05 14:17:36 sephe Exp $
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34 */
35
36#include "opt_inet.h"
37
38#include <sys/param.h>
39#include <sys/systm.h>
40#include <sys/mbuf.h>
f186073c 41#include <sys/kernel.h>
f186073c 42#include <sys/endian.h>
f186073c 43
841ab66c 44#include <sys/socket.h>
f186073c 45
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46#include <net/bpf.h>
47#include <net/ethernet.h>
f186073c 48#include <net/if.h>
f186073c 49#include <net/if_arp.h>
f186073c 50#include <net/if_llc.h>
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51#include <net/if_media.h>
52#include <net/vlan/if_vlan_var.h>
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53
54#include <netproto/802_11/ieee80211_var.h>
55
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56#ifdef INET
57#include <netinet/in.h>
58#include <netinet/if_ether.h>
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59#include <netinet/in_systm.h>
60#include <netinet/ip.h>
61#endif
62
63#ifdef IEEE80211_DEBUG
64/*
65 * Decide if an outbound management frame should be
66 * printed when debugging is enabled. This filters some
67 * of the less interesting frames that come frequently
68 * (e.g. beacons).
69 */
70static __inline int
71doprint(struct ieee80211com *ic, int subtype)
72{
73 switch (subtype) {
74 case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
75 return (ic->ic_opmode == IEEE80211_M_IBSS);
76 }
77 return 1;
78}
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79#endif
80
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81/*
82 * Set the direction field and address fields of an outgoing
83 * non-QoS frame. Note this should be called early on in
84 * constructing a frame as it sets i_fc[1]; other bits can
85 * then be or'd in.
86 */
87static void
88ieee80211_send_setup(struct ieee80211com *ic,
89 struct ieee80211_node *ni,
90 struct ieee80211_frame *wh,
91 int type,
92 const uint8_t sa[IEEE80211_ADDR_LEN],
93 const uint8_t da[IEEE80211_ADDR_LEN],
94 const uint8_t bssid[IEEE80211_ADDR_LEN])
95{
96#define WH4(wh) ((struct ieee80211_frame_addr4 *)wh)
97
98 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | type;
99 if ((type & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_DATA) {
100 switch (ic->ic_opmode) {
101 case IEEE80211_M_STA:
102 wh->i_fc[1] = IEEE80211_FC1_DIR_TODS;
103 IEEE80211_ADDR_COPY(wh->i_addr1, bssid);
104 IEEE80211_ADDR_COPY(wh->i_addr2, sa);
105 IEEE80211_ADDR_COPY(wh->i_addr3, da);
106 break;
107 case IEEE80211_M_IBSS:
108 case IEEE80211_M_AHDEMO:
109 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
110 IEEE80211_ADDR_COPY(wh->i_addr1, da);
111 IEEE80211_ADDR_COPY(wh->i_addr2, sa);
112 IEEE80211_ADDR_COPY(wh->i_addr3, bssid);
113 break;
114 case IEEE80211_M_HOSTAP:
115 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
116 IEEE80211_ADDR_COPY(wh->i_addr1, da);
117 IEEE80211_ADDR_COPY(wh->i_addr2, bssid);
118 IEEE80211_ADDR_COPY(wh->i_addr3, sa);
119 break;
120 case IEEE80211_M_MONITOR: /* NB: to quiet compiler */
121 break;
122 }
123 } else {
124 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
125 IEEE80211_ADDR_COPY(wh->i_addr1, da);
126 IEEE80211_ADDR_COPY(wh->i_addr2, sa);
127 IEEE80211_ADDR_COPY(wh->i_addr3, bssid);
128 }
129 *(uint16_t *)&wh->i_dur[0] = 0;
130 /* NB: use non-QoS tid */
131 *(uint16_t *)&wh->i_seq[0] =
132 htole16(ni->ni_txseqs[0] << IEEE80211_SEQ_SEQ_SHIFT);
133 ni->ni_txseqs[0]++;
134#undef WH4
135}
136
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137/*
138 * Send a management frame to the specified node. The node pointer
139 * must have a reference as the pointer will be passed to the driver
140 * and potentially held for a long time. If the frame is successfully
141 * dispatched to the driver, then it is responsible for freeing the
142 * reference (and potentially free'ing up any associated storage).
143 */
144static int
841ab66c 145ieee80211_mgmt_output(struct ieee80211com *ic, struct ieee80211_node *ni,
cd5d1d24 146 struct mbuf *m, int type, int timer, int encrypt)
f186073c 147{
841ab66c 148 struct ifnet *ifp = ic->ic_ifp;
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149 struct ieee80211_frame *wh;
150
151 KASSERT(ni != NULL, ("null node"));
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152
153 /*
154 * Yech, hack alert! We want to pass the node down to the
155 * driver's start routine. If we don't do so then the start
156 * routine must immediately look it up again and that can
157 * cause a lock order reversal if, for example, this frame
158 * is being sent because the station is being timedout and
159 * the frame being sent is a DEAUTH message. We could stick
160 * this in an m_tag and tack that on to the mbuf. However
161 * that's rather expensive to do for every frame so instead
162 * we stuff it in the rcvif field since outbound frames do
163 * not (presently) use this.
164 */
165 M_PREPEND(m, sizeof(struct ieee80211_frame), MB_DONTWAIT);
166 if (m == NULL)
167 return ENOMEM;
168 KASSERT(m->m_pkthdr.rcvif == NULL, ("rcvif not null"));
169 m->m_pkthdr.rcvif = (void *)ni;
170
171 wh = mtod(m, struct ieee80211_frame *);
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172 ieee80211_send_setup(ic, ni, wh,
173 IEEE80211_FC0_TYPE_MGT | type,
174 ic->ic_myaddr, ni->ni_macaddr, ni->ni_bssid);
cd5d1d24 175 if (encrypt) {
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176 IEEE80211_DPRINTF(ic, IEEE80211_MSG_AUTH,
177 "[%6D] encrypting frame (%s)\n",
178 wh->i_addr1, ":", __func__);
179 wh->i_fc[1] |= IEEE80211_FC1_WEP;
180 }
f186073c 181#ifdef IEEE80211_DEBUG
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182 /* avoid printing too many frames */
183 if ((ieee80211_msg_debug(ic) && doprint(ic, type)) ||
184 ieee80211_msg_dumppkts(ic)) {
a6ec04bc 185 kprintf("[%6D] send %s on channel %u\n",
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186 wh->i_addr1, ":",
187 ieee80211_mgt_subtype_name[
188 (type & IEEE80211_FC0_SUBTYPE_MASK) >>
189 IEEE80211_FC0_SUBTYPE_SHIFT],
190 ieee80211_chan2ieee(ic, ic->ic_curchan));
191 }
f186073c 192#endif
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193 IEEE80211_NODE_STAT(ni, tx_mgmt);
194 IF_ENQUEUE(&ic->ic_mgtq, m);
195 if (timer) {
196 /*
197 * Set the mgt frame timeout.
198 */
199 ic->ic_mgt_timer = timer;
200 ifp->if_timer = 1;
f186073c 201 }
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202 ifp->if_start(ifp);
203 return 0;
204}
f186073c 205
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206/*
207 * Send a null data frame to the specified node.
208 *
209 * NB: the caller is assumed to have setup a node reference
210 * for use; this is necessary to deal with a race condition
211 * when probing for inactive stations.
212 */
213int
214ieee80211_send_nulldata(struct ieee80211_node *ni)
215{
216 struct ieee80211com *ic = ni->ni_ic;
217 struct ifnet *ifp = ic->ic_ifp;
218 struct mbuf *m;
219 struct ieee80211_frame *wh;
220
b11e1686 221 MGETHDR(m, MB_DONTWAIT, MT_HEADER);
841ab66c
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222 if (m == NULL) {
223 /* XXX debug msg */
224 ic->ic_stats.is_tx_nobuf++;
225 ieee80211_unref_node(&ni);
226 return ENOMEM;
227 }
228 m->m_pkthdr.rcvif = (void *) ni;
229
230 wh = mtod(m, struct ieee80211_frame *);
231 ieee80211_send_setup(ic, ni, wh,
232 IEEE80211_FC0_TYPE_DATA | IEEE80211_FC0_SUBTYPE_NODATA,
233 ic->ic_myaddr, ni->ni_macaddr, ni->ni_bssid);
234 /* NB: power management bit is never sent by an AP */
235 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) &&
236 ic->ic_opmode != IEEE80211_M_HOSTAP)
237 wh->i_fc[1] |= IEEE80211_FC1_PWR_MGT;
238 m->m_len = m->m_pkthdr.len = sizeof(struct ieee80211_frame);
239
240 IEEE80211_NODE_STAT(ni, tx_data);
241
242 IEEE80211_DPRINTF(ic, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS,
243 "[%s] send null data frame on channel %u, pwr mgt %s\n",
244 ni->ni_macaddr, ":",
245 ieee80211_chan2ieee(ic, ic->ic_curchan),
246 wh->i_fc[1] & IEEE80211_FC1_PWR_MGT ? "ena" : "dis");
247
248 IF_ENQUEUE(&ic->ic_mgtq, m); /* cheat */
249 ifp->if_start(ifp);
250 return 0;
251}
252
253/*
254 * Assign priority to a frame based on any vlan tag assigned
255 * to the station and/or any Diffserv setting in an IP header.
256 * Finally, if an ACM policy is setup (in station mode) it's
257 * applied.
258 */
259int
260ieee80211_classify(struct ieee80211com *ic, struct mbuf *m, struct ieee80211_node *ni)
261{
262 int v_wme_ac = 0, d_wme_ac, ac;
263#ifdef INET
264 struct ether_header *eh;
265#endif
266
267 if ((ni->ni_flags & IEEE80211_NODE_QOS) == 0) {
268 ac = WME_AC_BE;
269 goto done;
270 }
271
272#ifdef FREEBSD_VLAN
273 /*
274 * If node has a vlan tag then all traffic
275 * to it must have a matching tag.
276 */
277 v_wme_ac = 0;
278 if (ni->ni_vlan != 0) {
279 struct m_tag *mtag = VLAN_OUTPUT_TAG(ic->ic_ifp, m);
280 if (mtag == NULL) {
281 IEEE80211_NODE_STAT(ni, tx_novlantag);
282 return 1;
283 }
284 if (EVL_VLANOFTAG(VLAN_TAG_VALUE(mtag)) !=
285 EVL_VLANOFTAG(ni->ni_vlan)) {
286 IEEE80211_NODE_STAT(ni, tx_vlanmismatch);
287 return 1;
288 }
289 /* map vlan priority to AC */
290 switch (EVL_PRIOFTAG(ni->ni_vlan)) {
291 case 1:
292 case 2:
293 v_wme_ac = WME_AC_BK;
294 break;
295 case 0:
296 case 3:
297 v_wme_ac = WME_AC_BE;
298 break;
299 case 4:
300 case 5:
301 v_wme_ac = WME_AC_VI;
302 break;
303 case 6:
304 case 7:
305 v_wme_ac = WME_AC_VO;
306 break;
307 }
308 }
309#endif /* FREEBSD_VLAN */
310
311#ifdef INET
312 eh = mtod(m, struct ether_header *);
313 if (eh->ether_type == htons(ETHERTYPE_IP)) {
314 const struct ip *ip = (struct ip *)
315 (mtod(m, uint8_t *) + sizeof (*eh));
316 /*
317 * IP frame, map the TOS field.
318 */
319 switch (ip->ip_tos) {
320 case 0x08:
321 case 0x20:
322 d_wme_ac = WME_AC_BK; /* background */
323 break;
324 case 0x28:
325 case 0xa0:
326 d_wme_ac = WME_AC_VI; /* video */
327 break;
328 case 0x30: /* voice */
329 case 0xe0:
330 case 0x88: /* XXX UPSD */
331 case 0xb8:
332 d_wme_ac = WME_AC_VO;
333 break;
334 default:
335 d_wme_ac = WME_AC_BE;
336 break;
337 }
338 } else {
339#endif /* INET */
340 d_wme_ac = WME_AC_BE;
341#ifdef INET
342 }
343#endif
344 /*
345 * Use highest priority AC.
346 */
347 if (v_wme_ac > d_wme_ac)
348 ac = v_wme_ac;
349 else
350 ac = d_wme_ac;
351
352 /*
353 * Apply ACM policy.
354 */
355 if (ic->ic_opmode == IEEE80211_M_STA) {
356 static const int acmap[4] = {
357 WME_AC_BK, /* WME_AC_BE */
358 WME_AC_BK, /* WME_AC_BK */
359 WME_AC_BE, /* WME_AC_VI */
360 WME_AC_VI, /* WME_AC_VO */
361 };
362 while (ac != WME_AC_BK &&
363 ic->ic_wme.wme_wmeBssChanParams.cap_wmeParams[ac].wmep_acm)
364 ac = acmap[ac];
365 }
366done:
367 M_WME_SETAC(m, ac);
f186073c
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368 return 0;
369}
370
371/*
841ab66c
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372 * Insure there is sufficient contiguous space to encapsulate the
373 * 802.11 data frame. If room isn't already there, arrange for it.
374 * Drivers and cipher modules assume we have done the necessary work
375 * and fail rudely if they don't find the space they need.
376 */
377static struct mbuf *
378ieee80211_mbuf_adjust(struct ieee80211com *ic, int hdrsize,
379 struct ieee80211_key *key, struct mbuf *m)
380{
381#define TO_BE_RECLAIMED (sizeof(struct ether_header) - sizeof(struct llc))
382 int needed_space = hdrsize;
383
384 if (key != NULL) {
385 /* XXX belongs in crypto code? */
386 needed_space += key->wk_cipher->ic_header;
387 /* XXX frags */
388 /*
389 * When crypto is being done in the host we must insure
390 * the data are writable for the cipher routines; clone
391 * a writable mbuf chain.
392 * XXX handle SWMIC specially
393 */
394 if (key->wk_flags & (IEEE80211_KEY_SWCRYPT|IEEE80211_KEY_SWMIC)) {
395 m = ieee80211_mbuf_clone(m, MB_DONTWAIT);
396 if (m == NULL) {
397 IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT,
398 "%s: cannot get writable mbuf\n", __func__);
399 ic->ic_stats.is_tx_nobuf++; /* XXX new stat */
400 return NULL;
401 }
402 }
403 }
404 /*
405 * We know we are called just before stripping an Ethernet
406 * header and prepending an LLC header. This means we know
407 * there will be
408 * sizeof(struct ether_header) - sizeof(struct llc)
409 * bytes recovered to which we need additional space for the
410 * 802.11 header and any crypto header.
411 */
412 /* XXX check trailing space and copy instead? */
413 if (M_LEADINGSPACE(m) < needed_space - TO_BE_RECLAIMED) {
b11e1686 414 struct mbuf *n = m_gethdr(MB_DONTWAIT, m->m_type);
841ab66c
SZ
415 if (n == NULL) {
416 IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT,
417 "%s: cannot expand storage\n", __func__);
418 ic->ic_stats.is_tx_nobuf++;
419 m_freem(m);
420 return NULL;
421 }
422 KASSERT(needed_space <= MHLEN,
423 ("not enough room, need %u got %zu\n", needed_space, MHLEN));
424 /*
425 * Setup new mbuf to have leading space to prepend the
426 * 802.11 header and any crypto header bits that are
427 * required (the latter are added when the driver calls
428 * back to ieee80211_crypto_encap to do crypto encapsulation).
429 */
430 /* NB: must be first 'cuz it clobbers m_data */
431 m_move_pkthdr(n, m);
432 n->m_len = 0; /* NB: m_gethdr does not set */
433 n->m_data += needed_space;
434 /*
435 * Pull up Ethernet header to create the expected layout.
436 * We could use m_pullup but that's overkill (i.e. we don't
437 * need the actual data) and it cannot fail so do it inline
438 * for speed.
439 */
440 /* NB: struct ether_header is known to be contiguous */
441 n->m_len += sizeof(struct ether_header);
442 m->m_len -= sizeof(struct ether_header);
443 m->m_data += sizeof(struct ether_header);
444 /*
445 * Replace the head of the chain.
446 */
447 n->m_next = m;
448 m = n;
449 }
450 return m;
451#undef TO_BE_RECLAIMED
452}
453
454#define KEY_UNDEFINED(k) ((k).wk_cipher == &ieee80211_cipher_none)
455/*
456 * Return the transmit key to use in sending a unicast frame.
457 * If a unicast key is set we use that. When no unicast key is set
458 * we fall back to the default transmit key.
459 */
460static __inline struct ieee80211_key *
461ieee80211_crypto_getucastkey(struct ieee80211com *ic, struct ieee80211_node *ni)
462{
463 if (KEY_UNDEFINED(ni->ni_ucastkey)) {
464 if (ic->ic_def_txkey == IEEE80211_KEYIX_NONE ||
465 KEY_UNDEFINED(ic->ic_nw_keys[ic->ic_def_txkey]))
466 return NULL;
467 return &ic->ic_nw_keys[ic->ic_def_txkey];
468 } else {
469 return &ni->ni_ucastkey;
470 }
471}
472
473/*
474 * Return the transmit key to use in sending a multicast frame.
475 * Multicast traffic always uses the group key which is installed as
476 * the default tx key.
477 */
478static __inline struct ieee80211_key *
479ieee80211_crypto_getmcastkey(struct ieee80211com *ic, struct ieee80211_node *ni)
480{
481 if (ic->ic_def_txkey == IEEE80211_KEYIX_NONE ||
482 KEY_UNDEFINED(ic->ic_nw_keys[ic->ic_def_txkey]))
483 return NULL;
484 return &ic->ic_nw_keys[ic->ic_def_txkey];
485}
486
487/*
488 * Encapsulate an outbound data frame. The mbuf chain is updated.
489 * If an error is encountered NULL is returned. The caller is required
490 * to provide a node reference and pullup the ethernet header in the
491 * first mbuf.
f186073c
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492 */
493struct mbuf *
841ab66c
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494ieee80211_encap(struct ieee80211com *ic, struct mbuf *m,
495 struct ieee80211_node *ni)
f186073c 496{
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497 struct ether_header eh;
498 struct ieee80211_frame *wh;
841ab66c 499 struct ieee80211_key *key;
f186073c 500 struct llc *llc;
841ab66c 501 int hdrsize, datalen, addqos;
f186073c 502
841ab66c 503 KASSERT(m->m_len >= sizeof(eh), ("no ethernet header!"));
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504 memcpy(&eh, mtod(m, caddr_t), sizeof(struct ether_header));
505
841ab66c
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506 /*
507 * Insure space for additional headers. First identify
508 * transmit key to use in calculating any buffer adjustments
509 * required. This is also used below to do privacy
510 * encapsulation work. Then calculate the 802.11 header
511 * size and any padding required by the driver.
512 *
513 * Note key may be NULL if we fall back to the default
514 * transmit key and that is not set. In that case the
515 * buffer may not be expanded as needed by the cipher
516 * routines, but they will/should discard it.
517 */
518 if (ic->ic_flags & IEEE80211_F_PRIVACY) {
519 if (ic->ic_opmode == IEEE80211_M_STA ||
520 !IEEE80211_IS_MULTICAST(eh.ether_dhost))
521 key = ieee80211_crypto_getucastkey(ic, ni);
522 else
523 key = ieee80211_crypto_getmcastkey(ic, ni);
524 if (key == NULL && eh.ether_type != htons(ETHERTYPE_PAE)) {
525 IEEE80211_DPRINTF(ic, IEEE80211_MSG_CRYPTO,
526 "[%6D] no default transmit key (%s) deftxkey %u\n",
527 eh.ether_dhost, ":", __func__,
528 ic->ic_def_txkey);
529 ic->ic_stats.is_tx_nodefkey++;
530 }
531 } else
532 key = NULL;
533 /* XXX 4-address format */
534 /*
535 * XXX Some ap's don't handle QoS-encapsulated EAPOL
536 * frames so suppress use. This may be an issue if other
537 * ap's require all data frames to be QoS-encapsulated
538 * once negotiated in which case we'll need to make this
539 * configurable.
540 */
541 addqos = (ni->ni_flags & IEEE80211_NODE_QOS) &&
542 eh.ether_type != htons(ETHERTYPE_PAE);
543 if (addqos)
544 hdrsize = sizeof(struct ieee80211_qosframe);
545 else
546 hdrsize = sizeof(struct ieee80211_frame);
547 if (ic->ic_flags & IEEE80211_F_DATAPAD)
548 hdrsize = roundup(hdrsize, sizeof(uint32_t));
549 m = ieee80211_mbuf_adjust(ic, hdrsize, key, m);
550 if (m == NULL) {
551 /* NB: ieee80211_mbuf_adjust handles msgs+statistics */
f186073c
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552 goto bad;
553 }
f186073c 554
841ab66c 555 /* NB: this could be optimized because of ieee80211_mbuf_adjust */
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556 m_adj(m, sizeof(struct ether_header) - sizeof(struct llc));
557 llc = mtod(m, struct llc *);
558 llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP;
559 llc->llc_control = LLC_UI;
560 llc->llc_snap.org_code[0] = 0;
561 llc->llc_snap.org_code[1] = 0;
562 llc->llc_snap.org_code[2] = 0;
563 llc->llc_snap.ether_type = eh.ether_type;
841ab66c
SZ
564 datalen = m->m_pkthdr.len; /* NB: w/o 802.11 header */
565
566 M_PREPEND(m, hdrsize, MB_DONTWAIT);
f186073c 567 if (m == NULL) {
841ab66c 568 ic->ic_stats.is_tx_nobuf++;
f186073c
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569 goto bad;
570 }
571 wh = mtod(m, struct ieee80211_frame *);
572 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_DATA;
573 *(uint16_t *)wh->i_dur = 0;
f186073c
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574 switch (ic->ic_opmode) {
575 case IEEE80211_M_STA:
576 wh->i_fc[1] = IEEE80211_FC1_DIR_TODS;
577 IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_bssid);
578 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost);
579 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost);
580 break;
581 case IEEE80211_M_IBSS:
582 case IEEE80211_M_AHDEMO:
583 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
584 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost);
585 IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost);
841ab66c
SZ
586 /*
587 * NB: always use the bssid from ic_bss as the
588 * neighbor's may be stale after an ibss merge
589 */
590 IEEE80211_ADDR_COPY(wh->i_addr3, ic->ic_bss->ni_bssid);
f186073c
JS
591 break;
592 case IEEE80211_M_HOSTAP:
593 wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
594 IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost);
595 IEEE80211_ADDR_COPY(wh->i_addr2, ni->ni_bssid);
596 IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_shost);
597 break;
598 case IEEE80211_M_MONITOR:
599 goto bad;
600 }
841ab66c
SZ
601 if (m->m_flags & M_MORE_DATA)
602 wh->i_fc[1] |= IEEE80211_FC1_MORE_DATA;
603 if (addqos) {
604 struct ieee80211_qosframe *qwh =
605 (struct ieee80211_qosframe *) wh;
606 int ac, tid;
607
608 ac = M_WME_GETAC(m);
609 /* map from access class/queue to 11e header priorty value */
610 tid = WME_AC_TO_TID(ac);
611 qwh->i_qos[0] = tid & IEEE80211_QOS_TID;
612 if (ic->ic_wme.wme_wmeChanParams.cap_wmeParams[ac].wmep_noackPolicy)
613 qwh->i_qos[0] |= 1 << IEEE80211_QOS_ACKPOLICY_S;
614 qwh->i_qos[1] = 0;
615 qwh->i_fc[0] |= IEEE80211_FC0_SUBTYPE_QOS;
616
617 *(uint16_t *)wh->i_seq =
618 htole16(ni->ni_txseqs[tid] << IEEE80211_SEQ_SEQ_SHIFT);
619 ni->ni_txseqs[tid]++;
620 } else {
621 *(uint16_t *)wh->i_seq =
622 htole16(ni->ni_txseqs[0] << IEEE80211_SEQ_SEQ_SHIFT);
623 ni->ni_txseqs[0]++;
624 }
625 if (key != NULL) {
626 /*
627 * IEEE 802.1X: send EAPOL frames always in the clear.
628 * WPA/WPA2: encrypt EAPOL keys when pairwise keys are set.
629 */
630 if (eh.ether_type != htons(ETHERTYPE_PAE) ||
631 ((ic->ic_flags & IEEE80211_F_WPA) &&
632 (ic->ic_opmode == IEEE80211_M_STA ?
633 !KEY_UNDEFINED(*key) : !KEY_UNDEFINED(ni->ni_ucastkey)))) {
634 wh->i_fc[1] |= IEEE80211_FC1_WEP;
635 /* XXX do fragmentation */
636 if (!ieee80211_crypto_enmic(ic, key, m, 0)) {
637 IEEE80211_DPRINTF(ic, IEEE80211_MSG_OUTPUT,
638 "[%6D] enmic failed, discard frame\n",
639 eh.ether_dhost, ":");
640 ic->ic_stats.is_crypto_enmicfail++;
641 goto bad;
642 }
643 }
644 }
645
646 IEEE80211_NODE_STAT(ni, tx_data);
fb134238
SZ
647 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
648 IEEE80211_NODE_STAT(ni, tx_mcast);
649 else
650 IEEE80211_NODE_STAT(ni, tx_ucast);
841ab66c
SZ
651 IEEE80211_NODE_STAT_ADD(ni, tx_bytes, datalen);
652
f186073c
JS
653 return m;
654bad:
655 if (m != NULL)
656 m_freem(m);
f186073c
JS
657 return NULL;
658}
659
660/*
661 * Add a supported rates element id to a frame.
662 */
663uint8_t *
664ieee80211_add_rates(uint8_t *frm, const struct ieee80211_rateset *rs)
665{
666 int nrates;
667
668 *frm++ = IEEE80211_ELEMID_RATES;
669 nrates = rs->rs_nrates;
670 if (nrates > IEEE80211_RATE_SIZE)
671 nrates = IEEE80211_RATE_SIZE;
672 *frm++ = nrates;
673 memcpy(frm, rs->rs_rates, nrates);
674 return frm + nrates;
675}
676
677/*
678 * Add an extended supported rates element id to a frame.
679 */
680uint8_t *
681ieee80211_add_xrates(uint8_t *frm, const struct ieee80211_rateset *rs)
682{
683 /*
684 * Add an extended supported rates element if operating in 11g mode.
685 */
686 if (rs->rs_nrates > IEEE80211_RATE_SIZE) {
687 int nrates = rs->rs_nrates - IEEE80211_RATE_SIZE;
688 *frm++ = IEEE80211_ELEMID_XRATES;
689 *frm++ = nrates;
690 memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates);
691 frm += nrates;
692 }
693 return frm;
694}
695
696/*
697 * Add an ssid elemet to a frame.
698 */
841ab66c 699uint8_t *
f186073c
JS
700ieee80211_add_ssid(uint8_t *frm, const uint8_t *ssid, u_int len)
701{
702 *frm++ = IEEE80211_ELEMID_SSID;
703 *frm++ = len;
704 memcpy(frm, ssid, len);
705 return frm + len;
706}
707
841ab66c
SZ
708/*
709 * Add an erp element to a frame.
710 */
711static uint8_t *
712ieee80211_add_erp(uint8_t *frm, struct ieee80211com *ic)
713{
714 uint8_t erp;
715
716 *frm++ = IEEE80211_ELEMID_ERP;
717 *frm++ = 1;
718 erp = 0;
719 if (ic->ic_nonerpsta != 0)
720 erp |= IEEE80211_ERP_NON_ERP_PRESENT;
721 if (ic->ic_flags & IEEE80211_F_USEPROT)
722 erp |= IEEE80211_ERP_USE_PROTECTION;
723 if (ic->ic_flags & IEEE80211_F_USEBARKER)
724 erp |= IEEE80211_ERP_LONG_PREAMBLE;
725 *frm++ = erp;
726 return frm;
727}
728
729static uint8_t *
730ieee80211_setup_wpa_ie(struct ieee80211com *ic, uint8_t *ie)
731{
732#define WPA_OUI_BYTES 0x00, 0x50, 0xf2
733#define ADDSHORT(frm, v) do { \
734 frm[0] = (v) & 0xff; \
735 frm[1] = (v) >> 8; \
736 frm += 2; \
737} while (0)
738#define ADDSELECTOR(frm, sel) do { \
739 memcpy(frm, sel, 4); \
740 frm += 4; \
741} while (0)
742 static const uint8_t oui[4] = { WPA_OUI_BYTES, WPA_OUI_TYPE };
743 static const uint8_t cipher_suite[][4] = {
744 { WPA_OUI_BYTES, WPA_CSE_WEP40 }, /* NB: 40-bit */
745 { WPA_OUI_BYTES, WPA_CSE_TKIP },
746 { 0x00, 0x00, 0x00, 0x00 }, /* XXX WRAP */
747 { WPA_OUI_BYTES, WPA_CSE_CCMP },
748 { 0x00, 0x00, 0x00, 0x00 }, /* XXX CKIP */
749 { WPA_OUI_BYTES, WPA_CSE_NULL },
750 };
751 static const uint8_t wep104_suite[4] =
752 { WPA_OUI_BYTES, WPA_CSE_WEP104 };
753 static const uint8_t key_mgt_unspec[4] =
754 { WPA_OUI_BYTES, WPA_ASE_8021X_UNSPEC };
755 static const uint8_t key_mgt_psk[4] =
756 { WPA_OUI_BYTES, WPA_ASE_8021X_PSK };
757 const struct ieee80211_rsnparms *rsn = &ic->ic_bss->ni_rsn;
758 uint8_t *frm = ie;
759 uint8_t *selcnt;
760
761 *frm++ = IEEE80211_ELEMID_VENDOR;
762 *frm++ = 0; /* length filled in below */
763 memcpy(frm, oui, sizeof(oui)); /* WPA OUI */
764 frm += sizeof(oui);
765 ADDSHORT(frm, WPA_VERSION);
766
767 /* XXX filter out CKIP */
768
769 /* multicast cipher */
770 if (rsn->rsn_mcastcipher == IEEE80211_CIPHER_WEP &&
771 rsn->rsn_mcastkeylen >= 13)
772 ADDSELECTOR(frm, wep104_suite);
773 else
774 ADDSELECTOR(frm, cipher_suite[rsn->rsn_mcastcipher]);
775
776 /* unicast cipher list */
777 selcnt = frm;
778 ADDSHORT(frm, 0); /* selector count */
779 if (rsn->rsn_ucastcipherset & (1<<IEEE80211_CIPHER_AES_CCM)) {
780 selcnt[0]++;
781 ADDSELECTOR(frm, cipher_suite[IEEE80211_CIPHER_AES_CCM]);
782 }
783 if (rsn->rsn_ucastcipherset & (1<<IEEE80211_CIPHER_TKIP)) {
784 selcnt[0]++;
785 ADDSELECTOR(frm, cipher_suite[IEEE80211_CIPHER_TKIP]);
786 }
787
788 /* authenticator selector list */
789 selcnt = frm;
790 ADDSHORT(frm, 0); /* selector count */
791 if (rsn->rsn_keymgmtset & WPA_ASE_8021X_UNSPEC) {
792 selcnt[0]++;
793 ADDSELECTOR(frm, key_mgt_unspec);
794 }
795 if (rsn->rsn_keymgmtset & WPA_ASE_8021X_PSK) {
796 selcnt[0]++;
797 ADDSELECTOR(frm, key_mgt_psk);
798 }
799
800 /* optional capabilities */
801 if (rsn->rsn_caps != 0 && rsn->rsn_caps != RSN_CAP_PREAUTH)
802 ADDSHORT(frm, rsn->rsn_caps);
803
804 /* calculate element length */
805 ie[1] = frm - ie - 2;
806 KASSERT(ie[1]+2 <= sizeof(struct ieee80211_ie_wpa),
807 ("WPA IE too big, %u > %zu",
808 ie[1]+2, sizeof(struct ieee80211_ie_wpa)));
809 return frm;
810#undef ADDSHORT
811#undef ADDSELECTOR
812#undef WPA_OUI_BYTES
813}
814
815static uint8_t *
816ieee80211_setup_rsn_ie(struct ieee80211com *ic, uint8_t *ie)
f186073c 817{
841ab66c
SZ
818#define RSN_OUI_BYTES 0x00, 0x0f, 0xac
819#define ADDSHORT(frm, v) do { \
820 frm[0] = (v) & 0xff; \
821 frm[1] = (v) >> 8; \
822 frm += 2; \
823} while (0)
824#define ADDSELECTOR(frm, sel) do { \
825 memcpy(frm, sel, 4); \
826 frm += 4; \
827} while (0)
828 static const uint8_t cipher_suite[][4] = {
829 { RSN_OUI_BYTES, RSN_CSE_WEP40 }, /* NB: 40-bit */
830 { RSN_OUI_BYTES, RSN_CSE_TKIP },
831 { RSN_OUI_BYTES, RSN_CSE_WRAP },
832 { RSN_OUI_BYTES, RSN_CSE_CCMP },
833 { 0x00, 0x00, 0x00, 0x00 }, /* XXX CKIP */
834 { RSN_OUI_BYTES, RSN_CSE_NULL },
835 };
836 static const uint8_t wep104_suite[4] =
837 { RSN_OUI_BYTES, RSN_CSE_WEP104 };
838 static const uint8_t key_mgt_unspec[4] =
839 { RSN_OUI_BYTES, RSN_ASE_8021X_UNSPEC };
840 static const uint8_t key_mgt_psk[4] =
841 { RSN_OUI_BYTES, RSN_ASE_8021X_PSK };
842 const struct ieee80211_rsnparms *rsn = &ic->ic_bss->ni_rsn;
843 uint8_t *frm = ie;
844 uint8_t *selcnt;
845
846 *frm++ = IEEE80211_ELEMID_RSN;
847 *frm++ = 0; /* length filled in below */
848 ADDSHORT(frm, RSN_VERSION);
849
850 /* XXX filter out CKIP */
851
852 /* multicast cipher */
853 if (rsn->rsn_mcastcipher == IEEE80211_CIPHER_WEP &&
854 rsn->rsn_mcastkeylen >= 13)
855 ADDSELECTOR(frm, wep104_suite);
856 else
857 ADDSELECTOR(frm, cipher_suite[rsn->rsn_mcastcipher]);
858
859 /* unicast cipher list */
860 selcnt = frm;
861 ADDSHORT(frm, 0); /* selector count */
862 if (rsn->rsn_ucastcipherset & (1<<IEEE80211_CIPHER_AES_CCM)) {
863 selcnt[0]++;
864 ADDSELECTOR(frm, cipher_suite[IEEE80211_CIPHER_AES_CCM]);
865 }
866 if (rsn->rsn_ucastcipherset & (1<<IEEE80211_CIPHER_TKIP)) {
867 selcnt[0]++;
868 ADDSELECTOR(frm, cipher_suite[IEEE80211_CIPHER_TKIP]);
869 }
870
871 /* authenticator selector list */
872 selcnt = frm;
873 ADDSHORT(frm, 0); /* selector count */
874 if (rsn->rsn_keymgmtset & WPA_ASE_8021X_UNSPEC) {
875 selcnt[0]++;
876 ADDSELECTOR(frm, key_mgt_unspec);
877 }
878 if (rsn->rsn_keymgmtset & WPA_ASE_8021X_PSK) {
879 selcnt[0]++;
880 ADDSELECTOR(frm, key_mgt_psk);
881 }
882
883 /* optional capabilities */
884 ADDSHORT(frm, rsn->rsn_caps);
885 /* XXX PMKID */
886
887 /* calculate element length */
888 ie[1] = frm - ie - 2;
889 KASSERT(ie[1]+2 <= sizeof(struct ieee80211_ie_wpa),
890 ("RSN IE too big, %u > %zu",
891 ie[1]+2, sizeof(struct ieee80211_ie_wpa)));
892 return frm;
893#undef ADDSELECTOR
894#undef ADDSHORT
895#undef RSN_OUI_BYTES
896}
897
898/*
899 * Add a WPA/RSN element to a frame.
900 */
901static uint8_t *
902ieee80211_add_wpa(uint8_t *frm, struct ieee80211com *ic)
903{
904
905 KASSERT(ic->ic_flags & IEEE80211_F_WPA, ("no WPA/RSN!"));
906 if (ic->ic_flags & IEEE80211_F_WPA2)
907 frm = ieee80211_setup_rsn_ie(ic, frm);
908 if (ic->ic_flags & IEEE80211_F_WPA1)
909 frm = ieee80211_setup_wpa_ie(ic, frm);
910 return frm;
911}
912
913#define WME_OUI_BYTES 0x00, 0x50, 0xf2
914/*
915 * Add a WME information element to a frame.
916 */
917static uint8_t *
918ieee80211_add_wme_info(uint8_t *frm, struct ieee80211_wme_state *wme)
919{
920 static const struct ieee80211_wme_info info = {
921 .wme_id = IEEE80211_ELEMID_VENDOR,
922 .wme_len = sizeof(struct ieee80211_wme_info) - 2,
923 .wme_oui = { WME_OUI_BYTES },
924 .wme_type = WME_OUI_TYPE,
925 .wme_subtype = WME_INFO_OUI_SUBTYPE,
926 .wme_version = WME_VERSION,
927 .wme_info = 0,
928 };
929 memcpy(frm, &info, sizeof(info));
930 return frm + sizeof(info);
931}
932
933/*
934 * Add a WME parameters element to a frame.
935 */
936static uint8_t *
937ieee80211_add_wme_param(uint8_t *frm, struct ieee80211_wme_state *wme)
938{
939#define SM(_v, _f) (((_v) << _f##_S) & _f)
940#define ADDSHORT(frm, v) do { \
941 frm[0] = (v) & 0xff; \
942 frm[1] = (v) >> 8; \
943 frm += 2; \
944} while (0)
945 /* NB: this works 'cuz a param has an info at the front */
946 static const struct ieee80211_wme_info param = {
947 .wme_id = IEEE80211_ELEMID_VENDOR,
948 .wme_len = sizeof(struct ieee80211_wme_param) - 2,
949 .wme_oui = { WME_OUI_BYTES },
950 .wme_type = WME_OUI_TYPE,
951 .wme_subtype = WME_PARAM_OUI_SUBTYPE,
952 .wme_version = WME_VERSION,
953 };
954 int i;
955
956 memcpy(frm, &param, sizeof(param));
957 frm += __offsetof(struct ieee80211_wme_info, wme_info);
958 *frm++ = wme->wme_bssChanParams.cap_info; /* AC info */
959 *frm++ = 0; /* reserved field */
960 for (i = 0; i < WME_NUM_AC; i++) {
961 const struct wmeParams *ac =
962 &wme->wme_bssChanParams.cap_wmeParams[i];
963 *frm++ = SM(i, WME_PARAM_ACI)
964 | SM(ac->wmep_acm, WME_PARAM_ACM)
965 | SM(ac->wmep_aifsn, WME_PARAM_AIFSN)
966 ;
967 *frm++ = SM(ac->wmep_logcwmax, WME_PARAM_LOGCWMAX)
968 | SM(ac->wmep_logcwmin, WME_PARAM_LOGCWMIN)
969 ;
970 ADDSHORT(frm, ac->wmep_txopLimit);
971 }
972 return frm;
973#undef SM
974#undef ADDSHORT
975}
976#undef WME_OUI_BYTES
977
978/*
979 * Send a probe request frame with the specified ssid
980 * and any optional information element data.
981 */
982int
983ieee80211_send_probereq(struct ieee80211_node *ni,
984 const uint8_t sa[IEEE80211_ADDR_LEN],
985 const uint8_t da[IEEE80211_ADDR_LEN],
986 const uint8_t bssid[IEEE80211_ADDR_LEN],
987 const uint8_t *ssid, size_t ssidlen,
988 const void *optie, size_t optielen)
989{
990 struct ieee80211com *ic = ni->ni_ic;
991 struct ifnet *ifp = ic->ic_ifp;
992 enum ieee80211_phymode mode;
993 struct ieee80211_frame *wh;
41121c6e 994 struct ieee80211_rateset rs;
f186073c 995 struct mbuf *m;
841ab66c 996 uint8_t *frm;
f186073c 997
841ab66c
SZ
998 /*
999 * Hold a reference on the node so it doesn't go away until after
1000 * the xmit is complete all the way in the driver. On error we
1001 * will remove our reference.
1002 */
1003 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE,
1004 "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n",
1005 __func__, __LINE__,
1006 ni, ni->ni_macaddr, ":",
1007 ieee80211_node_refcnt(ni) + 1);
1008 ieee80211_ref_node(ni);
1009
1010 /*
1011 * prreq frame format
1012 * [tlv] ssid
1013 * [tlv] supported rates
1014 * [tlv] extended supported rates
1015 * [tlv] user-specified ie's
1016 */
1017 m = ieee80211_getmgtframe(&frm,
1018 2 + IEEE80211_NWID_LEN
1019 + 2 + IEEE80211_RATE_SIZE
1020 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
1021 + (optie != NULL ? optielen : 0)
1022 );
1023 if (m == NULL) {
1024 ic->ic_stats.is_tx_nobuf++;
1025 ieee80211_free_node(ni);
1026 return ENOMEM;
1027 }
1028
1029 frm = ieee80211_add_ssid(frm, ssid, ssidlen);
41121c6e
SZ
1030
1031 /*
1032 * XXX
1033 * Clear basic rates.
1034 *
1035 * Though according to 802.11 standard: MSB of each supported rate
1036 * octet in (Extended) Supported Rates ie of probe requests should
1037 * be ignored, some HostAP implementations still check it ...
1038 */
841ab66c 1039 mode = ieee80211_chan2mode(ic, ic->ic_curchan);
41121c6e 1040 rs = ic->ic_sup_rates[mode];
9639b71d 1041 ieee80211_set_basicrates(&rs, IEEE80211_MODE_AUTO, 0);
41121c6e
SZ
1042 frm = ieee80211_add_rates(frm, &rs);
1043 frm = ieee80211_add_xrates(frm, &rs);
841ab66c
SZ
1044
1045 if (optie != NULL) {
1046 memcpy(frm, optie, optielen);
1047 frm += optielen;
1048 }
1049 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
1050
1051 M_PREPEND(m, sizeof(struct ieee80211_frame), MB_DONTWAIT);
1052 if (m == NULL)
1053 return ENOMEM;
1054 KASSERT(m->m_pkthdr.rcvif == NULL, ("rcvif not null"));
1055 m->m_pkthdr.rcvif = (void *)ni;
1056
1057 wh = mtod(m, struct ieee80211_frame *);
1058 ieee80211_send_setup(ic, ni, wh,
1059 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ,
1060 sa, da, bssid);
1061 /* XXX power management? */
1062
1063 IEEE80211_NODE_STAT(ni, tx_probereq);
1064 IEEE80211_NODE_STAT(ni, tx_mgmt);
1065
1066 IEEE80211_DPRINTF(ic, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS,
1067 "[%6D] send probe req on channel %u\n",
1068 wh->i_addr1, ":",
1069 ieee80211_chan2ieee(ic, ic->ic_curchan));
1070
1071 IF_ENQUEUE(&ic->ic_mgtq, m);
1072 ifp->if_start(ifp);
1073 return 0;
1074}
1075
1076/*
1077 * Calculate capability information for mgt frames.
1078 */
1079static uint16_t
1080getcapinfo(struct ieee80211com *ic, struct ieee80211_channel *chan)
1081{
1082 uint16_t capinfo;
1083
1084 KASSERT(ic->ic_opmode != IEEE80211_M_STA, ("station mode"));
1085
1086 if (ic->ic_opmode == IEEE80211_M_HOSTAP)
1087 capinfo = IEEE80211_CAPINFO_ESS;
1088 else if (ic->ic_opmode == IEEE80211_M_IBSS)
1089 capinfo = IEEE80211_CAPINFO_IBSS;
f186073c 1090 else
841ab66c
SZ
1091 capinfo = 0;
1092 if (ic->ic_flags & IEEE80211_F_PRIVACY)
1093 capinfo |= IEEE80211_CAPINFO_PRIVACY;
21152d39
SZ
1094 if (IEEE80211_IS_CHAN_2GHZ(chan)) {
1095 if (ic->ic_flags & IEEE80211_F_SHPREAMBLE)
1096 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
1097 if (ic->ic_caps_ext & IEEE80211_CEXT_PBCC)
1098 capinfo |= IEEE80211_CAPINFO_PBCC;
1099 }
841ab66c
SZ
1100 if (ic->ic_flags & IEEE80211_F_SHSLOT)
1101 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
1102 return capinfo;
f186073c
JS
1103}
1104
3da93495
SZ
1105static struct mbuf *
1106_ieee80211_probe_resp_alloc(struct ieee80211com *ic, struct ieee80211_node *ni)
1107{
208a1285 1108 const struct ieee80211_rateset *rs;
3da93495
SZ
1109 uint16_t capinfo;
1110 struct mbuf *m;
1111 uint8_t *frm;
1112 int pktlen;
1113
1114 /*
1115 * probe response frame format
1116 * [8] time stamp
1117 * [2] beacon interval
1118 * [2] cabability information
1119 * [tlv] ssid
1120 * [tlv] supported rates
1121 * [tlv] parameter set (FH/DS)
1122 * [4] parameter set (IBSS)
1123 * [tlv] extended rate phy (ERP)
1124 * [tlv] extended supported rates
1125 * [tlv] WPA
1126 * [tlv] WME (optional)
1127 */
208a1285
SZ
1128 KKASSERT(ic->ic_curmode != IEEE80211_MODE_AUTO);
1129 rs = &ic->ic_sup_rates[ic->ic_curmode];
3da93495
SZ
1130 pktlen = 8 /* time stamp */
1131 + sizeof(uint16_t) /* beacon interval */
1132 + sizeof(uint16_t) /* capabilities */
1133 + 2 + ni->ni_esslen /* ssid */
1134 + 2 + IEEE80211_RATE_SIZE /* supported rates */
1135 + 2 + 5 /* max(5,1) */ /* DS/FH parameters */
1136 + 2 + 2 /* IBSS parameters */
1137 + 2 + 1 /* ERP */
1138 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
1139 /* XXX !WPA1+WPA2 fits w/o a cluster */
1140 + (ic->ic_flags & IEEE80211_F_WPA ? /* WPA 1+2 */
1141 2*sizeof(struct ieee80211_ie_wpa) : 0)
1142 + sizeof(struct ieee80211_wme_param); /* WME */
1143
1144 m = ieee80211_getmgtframe(&frm, pktlen);
1145 if (m == NULL) {
1146 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY,
1147 "%s: cannot get buf; size %u\n", __func__, pktlen);
1148 ic->ic_stats.is_tx_nobuf++;
1149 return NULL;
1150 }
1151
1152 memset(frm, 0, 8); /* timestamp should be filled later */
1153 frm += 8;
1154 *(uint16_t *)frm = htole16(ni->ni_intval);
1155 frm += 2;
1156 capinfo = getcapinfo(ic, ni->ni_chan);
1157 *(uint16_t *)frm = htole16(capinfo);
1158 frm += 2;
1159
1160 frm = ieee80211_add_ssid(frm, ni->ni_essid, ni->ni_esslen);
1161 frm = ieee80211_add_rates(frm, rs);
1162
1163 if (ic->ic_phytype == IEEE80211_T_FH) {
1164 *frm++ = IEEE80211_ELEMID_FHPARMS;
1165 *frm++ = 5;
1166 *frm++ = ni->ni_fhdwell & 0x00ff;
1167 *frm++ = (ni->ni_fhdwell >> 8) & 0x00ff;
1168 *frm++ = IEEE80211_FH_CHANSET(
1169 ieee80211_chan2ieee(ic, ni->ni_chan));
1170 *frm++ = IEEE80211_FH_CHANPAT(
1171 ieee80211_chan2ieee(ic, ni->ni_chan));
1172 *frm++ = ni->ni_fhindex;
1173 } else {
1174 *frm++ = IEEE80211_ELEMID_DSPARMS;
1175 *frm++ = 1;
1176 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan);
1177 }
1178
1179 if (ic->ic_opmode == IEEE80211_M_IBSS) {
1180 *frm++ = IEEE80211_ELEMID_IBSSPARMS;
1181 *frm++ = 2;
1182 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */
1183 }
1184 if (ic->ic_flags & IEEE80211_F_WPA)
1185 frm = ieee80211_add_wpa(frm, ic);
1186 if (ic->ic_curmode == IEEE80211_MODE_11G)
1187 frm = ieee80211_add_erp(frm, ic);
1188 frm = ieee80211_add_xrates(frm, rs);
1189 if (ic->ic_flags & IEEE80211_F_WME)
1190 frm = ieee80211_add_wme_param(frm, &ic->ic_wme);
1191 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
1192 KKASSERT(m->m_len <= pktlen);
1193
1194 return m;
1195}
1196
f186073c
JS
1197/*
1198 * Send a management frame. The node is for the destination (or ic_bss
1199 * when in station mode). Nodes other than ic_bss have their reference
1200 * count bumped to reflect our use for an indeterminant time.
1201 */
1202int
1203ieee80211_send_mgmt(struct ieee80211com *ic, struct ieee80211_node *ni,
1204 int type, int arg)
1205{
1206#define senderr(_x, _v) do { ic->ic_stats._v++; ret = _x; goto bad; } while (0)
f186073c
JS
1207 struct mbuf *m;
1208 uint8_t *frm;
f186073c 1209 uint16_t capinfo;
cd5d1d24 1210 int has_challenge, is_shared_key, ret, timer, status, encrypt;
208a1285 1211 const struct ieee80211_rateset *rs;
f186073c
JS
1212
1213 KASSERT(ni != NULL, ("null node"));
1214
1215 /*
1216 * Hold a reference on the node so it doesn't go away until after
1217 * the xmit is complete all the way in the driver. On error we
1218 * will remove our reference.
1219 */
841ab66c
SZ
1220 IEEE80211_DPRINTF(ic, IEEE80211_MSG_NODE,
1221 "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n",
1222 __func__, __LINE__,
1223 ni, ni->ni_macaddr, ":",
1224 ieee80211_node_refcnt(ni) + 1);
1225 ieee80211_ref_node(ni);
1226
cd5d1d24 1227 encrypt = 0;
f186073c
JS
1228 timer = 0;
1229 switch (type) {
f186073c 1230 case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
208a1285
SZ
1231 m = _ieee80211_probe_resp_alloc(ic, ic->ic_bss);
1232 if (m == NULL) {
1233 /* NB: Statistics have been updated. */
1234 ret = ENOMEM;
1235 goto bad;
f186073c 1236 }
f186073c
JS
1237 break;
1238
1239 case IEEE80211_FC0_SUBTYPE_AUTH:
841ab66c
SZ
1240 status = arg >> 16;
1241 arg &= 0xffff;
1242 has_challenge = ((arg == IEEE80211_AUTH_SHARED_CHALLENGE ||
1243 arg == IEEE80211_AUTH_SHARED_RESPONSE) &&
1244 ni->ni_challenge != NULL);
1245
1246 /*
1247 * Deduce whether we're doing open authentication or
1248 * shared key authentication. We do the latter if
1249 * we're in the middle of a shared key authentication
1250 * handshake or if we're initiating an authentication
1251 * request and configured to use shared key.
1252 */
1253 is_shared_key = has_challenge ||
1254 arg >= IEEE80211_AUTH_SHARED_RESPONSE ||
1255 (arg == IEEE80211_AUTH_SHARED_REQUEST &&
1256 ic->ic_bss->ni_authmode == IEEE80211_AUTH_SHARED);
1257
1258 m = ieee80211_getmgtframe(&frm,
1259 3 * sizeof(uint16_t)
1260 + (has_challenge && status == IEEE80211_STATUS_SUCCESS ?
1261 sizeof(uint16_t)+IEEE80211_CHALLENGE_LEN : 0)
1262 );
f186073c 1263 if (m == NULL)
841ab66c
SZ
1264 senderr(ENOMEM, is_tx_nobuf);
1265
1266 ((uint16_t *)frm)[0] =
1267 (is_shared_key) ? htole16(IEEE80211_AUTH_ALG_SHARED)
1268 : htole16(IEEE80211_AUTH_ALG_OPEN);
f186073c 1269 ((uint16_t *)frm)[1] = htole16(arg); /* sequence number */
841ab66c
SZ
1270 ((uint16_t *)frm)[2] = htole16(status);/* status */
1271
1272 if (has_challenge && status == IEEE80211_STATUS_SUCCESS) {
1273 ((uint16_t *)frm)[3] =
1274 htole16((IEEE80211_CHALLENGE_LEN << 8) |
1275 IEEE80211_ELEMID_CHALLENGE);
1276 memcpy(&((uint16_t *)frm)[4], ni->ni_challenge,
1277 IEEE80211_CHALLENGE_LEN);
1278 m->m_pkthdr.len = m->m_len =
1279 4 * sizeof(uint16_t) + IEEE80211_CHALLENGE_LEN;
1280 if (arg == IEEE80211_AUTH_SHARED_RESPONSE) {
1281 IEEE80211_DPRINTF(ic, IEEE80211_MSG_AUTH,
1282 "[%6D] request encrypt frame (%s)\n",
1283 ni->ni_macaddr, ":", __func__);
cd5d1d24 1284 encrypt = 1; /* WEP-encrypt, please */
841ab66c
SZ
1285 }
1286 } else
1287 m->m_pkthdr.len = m->m_len = 3 * sizeof(uint16_t);
1288
1289 /* XXX not right for shared key */
1290 if (status == IEEE80211_STATUS_SUCCESS)
1291 IEEE80211_NODE_STAT(ni, tx_auth);
1292 else
1293 IEEE80211_NODE_STAT(ni, tx_auth_fail);
1294
f186073c
JS
1295 if (ic->ic_opmode == IEEE80211_M_STA)
1296 timer = IEEE80211_TRANS_WAIT;
1297 break;
1298
1299 case IEEE80211_FC0_SUBTYPE_DEAUTH:
841ab66c
SZ
1300 IEEE80211_DPRINTF(ic, IEEE80211_MSG_AUTH,
1301 "[%6D] send station deauthenticate (reason %d)\n",
1302 ni->ni_macaddr, ":", arg);
1303 m = ieee80211_getmgtframe(&frm, sizeof(uint16_t));
f186073c 1304 if (m == NULL)
841ab66c
SZ
1305 senderr(ENOMEM, is_tx_nobuf);
1306 *(uint16_t *)frm = htole16(arg); /* reason */
1307 m->m_pkthdr.len = m->m_len = sizeof(uint16_t);
1308
1309 IEEE80211_NODE_STAT(ni, tx_deauth);
1310 IEEE80211_NODE_STAT_SET(ni, tx_deauth_code, arg);
1311
1312 ieee80211_node_unauthorize(ni); /* port closed */
f186073c
JS
1313 break;
1314
1315 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
208a1285 1316 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
f186073c
JS
1317 /*
1318 * asreq frame format
1319 * [2] capability information
1320 * [2] listen interval
1321 * [6*] current AP address (reassoc only)
1322 * [tlv] ssid
1323 * [tlv] supported rates
1324 * [tlv] extended supported rates
841ab66c
SZ
1325 * [tlv] WME
1326 * [tlv] user-specified ie's
f186073c 1327 */
841ab66c
SZ
1328 m = ieee80211_getmgtframe(&frm,
1329 sizeof(uint16_t)
f186073c
JS
1330 + sizeof(uint16_t)
1331 + IEEE80211_ADDR_LEN
841ab66c 1332 + 2 + IEEE80211_NWID_LEN
f186073c 1333 + 2 + IEEE80211_RATE_SIZE
841ab66c
SZ
1334 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
1335 + sizeof(struct ieee80211_wme_info)
1336 + (ic->ic_opt_ie != NULL ? ic->ic_opt_ie_len : 0)
1337 );
f186073c 1338 if (m == NULL)
841ab66c 1339 senderr(ENOMEM, is_tx_nobuf);
f186073c 1340
841ab66c
SZ
1341 KASSERT(ic->ic_opmode == IEEE80211_M_STA,
1342 ("wrong mode %u", ic->ic_opmode));
1343 capinfo = IEEE80211_CAPINFO_ESS;
1344 if (ic->ic_flags & IEEE80211_F_PRIVACY)
f186073c
JS
1345 capinfo |= IEEE80211_CAPINFO_PRIVACY;
1346 /*
1347 * NB: Some 11a AP's reject the request when
21152d39 1348 * short premable or PBCC modulation is set.
f186073c 1349 */
21152d39
SZ
1350 if (IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) {
1351 if (ic->ic_caps & IEEE80211_C_SHPREAMBLE)
1352 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
1353 if (ic->ic_caps_ext & IEEE80211_CEXT_PBCC)
1354 capinfo |= IEEE80211_CAPINFO_PBCC;
1355 }
841ab66c
SZ
1356 if ((ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME) &&
1357 (ic->ic_caps & IEEE80211_C_SHSLOT))
f186073c
JS
1358 capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
1359 *(uint16_t *)frm = htole16(capinfo);
1360 frm += 2;
1361
1362 *(uint16_t *)frm = htole16(ic->ic_lintval);
1363 frm += 2;
1364
1365 if (type == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) {
1366 IEEE80211_ADDR_COPY(frm, ic->ic_bss->ni_bssid);
1367 frm += IEEE80211_ADDR_LEN;
1368 }
1369
1370 frm = ieee80211_add_ssid(frm, ni->ni_essid, ni->ni_esslen);
8ec51a39
SZ
1371
1372 rs = &ic->ic_sup_rates[ieee80211_chan2mode(ic, ni->ni_chan)];
1373 frm = ieee80211_add_rates(frm, rs);
1374 frm = ieee80211_add_xrates(frm, rs);
1375
841ab66c
SZ
1376 if ((ic->ic_flags & IEEE80211_F_WME) && ni->ni_wme_ie != NULL)
1377 frm = ieee80211_add_wme_info(frm, &ic->ic_wme);
1378 if (ic->ic_opt_ie != NULL) {
1379 memcpy(frm, ic->ic_opt_ie, ic->ic_opt_ie_len);
1380 frm += ic->ic_opt_ie_len;
1381 }
f186073c
JS
1382 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
1383
1384 timer = IEEE80211_TRANS_WAIT;
1385 break;
1386
1387 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
1388 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
1389 /*
1390 * asreq frame format
1391 * [2] capability information
1392 * [2] status
1393 * [2] association ID
1394 * [tlv] supported rates
1395 * [tlv] extended supported rates
841ab66c 1396 * [tlv] WME (if enabled and STA enabled)
f186073c 1397 */
841ab66c
SZ
1398 m = ieee80211_getmgtframe(&frm,
1399 sizeof(uint16_t)
f186073c
JS
1400 + sizeof(uint16_t)
1401 + sizeof(uint16_t)
1402 + 2 + IEEE80211_RATE_SIZE
841ab66c
SZ
1403 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
1404 + sizeof(struct ieee80211_wme_param)
1405 );
f186073c 1406 if (m == NULL)
841ab66c 1407 senderr(ENOMEM, is_tx_nobuf);
f186073c 1408
841ab66c 1409 capinfo = getcapinfo(ic, ic->ic_curchan);
f186073c
JS
1410 *(uint16_t *)frm = htole16(capinfo);
1411 frm += 2;
1412
1413 *(uint16_t *)frm = htole16(arg); /* status */
1414 frm += 2;
1415
841ab66c 1416 if (arg == IEEE80211_STATUS_SUCCESS) {
f186073c 1417 *(uint16_t *)frm = htole16(ni->ni_associd);
841ab66c
SZ
1418 IEEE80211_NODE_STAT(ni, tx_assoc);
1419 } else
1420 IEEE80211_NODE_STAT(ni, tx_assoc_fail);
f186073c
JS
1421 frm += 2;
1422
208a1285
SZ
1423 KKASSERT(ic->ic_curmode != IEEE80211_MODE_AUTO);
1424 rs = &ic->ic_sup_rates[ic->ic_curmode];
1425 frm = ieee80211_add_rates(frm, rs);
1426 frm = ieee80211_add_xrates(frm, rs);
841ab66c
SZ
1427 if ((ic->ic_flags & IEEE80211_F_WME) && ni->ni_wme_ie != NULL)
1428 frm = ieee80211_add_wme_param(frm, &ic->ic_wme);
f186073c
JS
1429 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
1430 break;
1431
1432 case IEEE80211_FC0_SUBTYPE_DISASSOC:
841ab66c
SZ
1433 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ASSOC,
1434 "[%6D] send station disassociate (reason %d)\n",
1435 ni->ni_macaddr, ":", arg);
1436 m = ieee80211_getmgtframe(&frm, sizeof(uint16_t));
f186073c 1437 if (m == NULL)
841ab66c
SZ
1438 senderr(ENOMEM, is_tx_nobuf);
1439 *(uint16_t *)frm = htole16(arg); /* reason */
1440 m->m_pkthdr.len = m->m_len = sizeof(uint16_t);
1441
1442 IEEE80211_NODE_STAT(ni, tx_disassoc);
1443 IEEE80211_NODE_STAT_SET(ni, tx_disassoc_code, arg);
f186073c
JS
1444 break;
1445
1446 default:
841ab66c
SZ
1447 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY,
1448 "[%6D] invalid mgmt frame type %u\n",
1449 ni->ni_macaddr, ":", type);
f186073c
JS
1450 senderr(EINVAL, is_tx_unknownmgt);
1451 /* NOTREACHED */
1452 }
cd5d1d24 1453 ret = ieee80211_mgmt_output(ic, ni, m, type, timer, encrypt);
841ab66c 1454 if (ret != 0) {
f186073c 1455bad:
841ab66c 1456 ieee80211_free_node(ni);
f186073c
JS
1457 }
1458 return ret;
1459#undef senderr
1460}
841ab66c 1461
3da93495
SZ
1462/*
1463 * Allocate a probe response frame and fillin the appropriate bits.
1464 */
1465struct mbuf *
1466ieee80211_probe_resp_alloc(struct ieee80211com *ic, struct ieee80211_node *ni)
1467{
1468 struct ieee80211_frame *wh;
1469 struct mbuf *m;
1470
1471 m = _ieee80211_probe_resp_alloc(ic, ni);
1472 if (m == NULL)
1473 return NULL;
1474
1475 M_PREPEND(m, sizeof(struct ieee80211_frame), MB_DONTWAIT);
1476 KASSERT(m != NULL, ("no space for 802.11 header?"));
1477
1478 wh = mtod(m, struct ieee80211_frame *);
1479 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT |
1480 IEEE80211_FC0_SUBTYPE_PROBE_RESP;
1481 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
1482 *(uint16_t *)wh->i_dur = 0;
1483 bzero(wh->i_addr1, sizeof(wh->i_addr1));
1484 IEEE80211_ADDR_COPY(wh->i_addr2, ic->ic_myaddr);
1485 IEEE80211_ADDR_COPY(wh->i_addr3, ni->ni_bssid);
1486 *(uint16_t *)wh->i_seq = 0;
1487
1488 return m;
1489}
1490
841ab66c
SZ
1491/*
1492 * Allocate a beacon frame and fillin the appropriate bits.
1493 */
1494struct mbuf *
1495ieee80211_beacon_alloc(struct ieee80211com *ic, struct ieee80211_node *ni,
1496 struct ieee80211_beacon_offsets *bo)
1497{
1498 struct ifnet *ifp = ic->ic_ifp;
1499 struct ieee80211_frame *wh;
1500 struct mbuf *m;
1501 int pktlen;
1502 uint8_t *frm, *efrm;
1503 uint16_t capinfo;
208a1285 1504 const struct ieee80211_rateset *rs;
841ab66c
SZ
1505
1506 /*
1507 * beacon frame format
1508 * [8] time stamp
1509 * [2] beacon interval
1510 * [2] cabability information
1511 * [tlv] ssid
1512 * [tlv] supported rates
1513 * [3] parameter set (DS)
1514 * [tlv] parameter set (IBSS/TIM)
1515 * [tlv] extended rate phy (ERP)
1516 * [tlv] extended supported rates
1517 * [tlv] WME parameters
1518 * [tlv] WPA/RSN parameters
1519 * XXX Vendor-specific OIDs (e.g. Atheros)
1520 * NB: we allocate the max space required for the TIM bitmap.
1521 */
208a1285
SZ
1522 KKASSERT(ic->ic_curmode != IEEE80211_MODE_AUTO);
1523 rs = &ic->ic_sup_rates[ic->ic_curmode];
841ab66c
SZ
1524 pktlen = 8 /* time stamp */
1525 + sizeof(uint16_t) /* beacon interval */
1526 + sizeof(uint16_t) /* capabilities */
1527 + 2 + ni->ni_esslen /* ssid */
1528 + 2 + IEEE80211_RATE_SIZE /* supported rates */
1529 + 2 + 1 /* DS parameters */
1530 + 2 + 4 + ic->ic_tim_len /* DTIM/IBSSPARMS */
1531 + 2 + 1 /* ERP */
1532 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
1533 + (ic->ic_caps & IEEE80211_C_WME ? /* WME */
1534 sizeof(struct ieee80211_wme_param) : 0)
1535 + (ic->ic_caps & IEEE80211_C_WPA ? /* WPA 1+2 */
1536 2*sizeof(struct ieee80211_ie_wpa) : 0)
1537 ;
1538 m = ieee80211_getmgtframe(&frm, pktlen);
1539 if (m == NULL) {
1540 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY,
1541 "%s: cannot get buf; size %u\n", __func__, pktlen);
1542 ic->ic_stats.is_tx_nobuf++;
1543 return NULL;
1544 }
1545
1546 memset(frm, 0, 8); /* XXX timestamp is set by hardware/driver */
1547 frm += 8;
1548 *(uint16_t *)frm = htole16(ni->ni_intval);
1549 frm += 2;
1550 capinfo = getcapinfo(ic, ni->ni_chan);
1551 bo->bo_caps = (uint16_t *)frm;
1552 *(uint16_t *)frm = htole16(capinfo);
1553 frm += 2;
1554 *frm++ = IEEE80211_ELEMID_SSID;
1555 if ((ic->ic_flags & IEEE80211_F_HIDESSID) == 0) {
1556 *frm++ = ni->ni_esslen;
1557 memcpy(frm, ni->ni_essid, ni->ni_esslen);
1558 frm += ni->ni_esslen;
1559 } else
1560 *frm++ = 0;
1561 frm = ieee80211_add_rates(frm, rs);
1562 if (ic->ic_curmode != IEEE80211_MODE_FH) {
1563 *frm++ = IEEE80211_ELEMID_DSPARMS;
1564 *frm++ = 1;
1565 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan);
1566 }
1567 bo->bo_tim = frm;
1568 if (ic->ic_opmode == IEEE80211_M_IBSS) {
1569 *frm++ = IEEE80211_ELEMID_IBSSPARMS;
1570 *frm++ = 2;
1571 *frm++ = 0; *frm++ = 0; /* TODO: ATIM window */
1572 bo->bo_tim_len = 0;
1573 } else if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
1574 struct ieee80211_tim_ie *tie = (struct ieee80211_tim_ie *) frm;
1575
1576 tie->tim_ie = IEEE80211_ELEMID_TIM;
1577 tie->tim_len = 4; /* length */
1578 tie->tim_count = 0; /* DTIM count */
1579 tie->tim_period = ic->ic_dtim_period; /* DTIM period */
1580 tie->tim_bitctl = 0; /* bitmap control */
1581 tie->tim_bitmap[0] = 0; /* Partial Virtual Bitmap */
1582 frm += sizeof(struct ieee80211_tim_ie);
1583 bo->bo_tim_len = 1;
1584 }
1585 bo->bo_trailer = frm;
1586 if (ic->ic_flags & IEEE80211_F_WME) {
1587 bo->bo_wme = frm;
1588 frm = ieee80211_add_wme_param(frm, &ic->ic_wme);
1589 ic->ic_flags &= ~IEEE80211_F_WMEUPDATE;
1590 }
1591 if (ic->ic_flags & IEEE80211_F_WPA)
1592 frm = ieee80211_add_wpa(frm, ic);
1593 if (ic->ic_curmode == IEEE80211_MODE_11G) {
1594 bo->bo_erp = frm;
1595 frm = ieee80211_add_erp(frm, ic);
1596 }
1597 efrm = ieee80211_add_xrates(frm, rs);
1598 bo->bo_trailer_len = efrm - bo->bo_trailer;
1599 m->m_pkthdr.len = m->m_len = efrm - mtod(m, uint8_t *);
3da93495 1600 KKASSERT(m->m_len <= pktlen);
841ab66c
SZ
1601
1602 M_PREPEND(m, sizeof(struct ieee80211_frame), MB_DONTWAIT);
1603 KASSERT(m != NULL, ("no space for 802.11 header?"));
1604 wh = mtod(m, struct ieee80211_frame *);
1605 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT |
1606 IEEE80211_FC0_SUBTYPE_BEACON;
1607 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
1608 *(uint16_t *)wh->i_dur = 0;
1609 IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr);
1610 IEEE80211_ADDR_COPY(wh->i_addr2, ic->ic_myaddr);
1611 IEEE80211_ADDR_COPY(wh->i_addr3, ni->ni_bssid);
1612 *(uint16_t *)wh->i_seq = 0;
1613
1614 return m;
1615}
1616
1617/*
1618 * Update the dynamic parts of a beacon frame based on the current state.
1619 */
1620int
1621ieee80211_beacon_update(struct ieee80211com *ic, struct ieee80211_node *ni,
1622 struct ieee80211_beacon_offsets *bo, struct mbuf *m, int mcast)
1623{
1624 int len_changed = 0;
1625 uint16_t capinfo;
1626
1627 ASSERT_SERIALIZED(ic->ic_ifp->if_serializer);
1628
1629 /* XXX faster to recalculate entirely or just changes? */
1630 capinfo = getcapinfo(ic, ni->ni_chan);
1631 *bo->bo_caps = htole16(capinfo);
1632
1633 if (ic->ic_flags & IEEE80211_F_WME) {
1634 struct ieee80211_wme_state *wme = &ic->ic_wme;
1635
1636 /*
1637 * Check for agressive mode change. When there is
1638 * significant high priority traffic in the BSS
1639 * throttle back BE traffic by using conservative
1640 * parameters. Otherwise BE uses agressive params
1641 * to optimize performance of legacy/non-QoS traffic.
1642 */
1643 if (wme->wme_flags & WME_F_AGGRMODE) {
1644 if (wme->wme_hipri_traffic >
1645 wme->wme_hipri_switch_thresh) {
1646 IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
1647 "%s: traffic %u, disable aggressive mode\n",
1648 __func__, wme->wme_hipri_traffic);
1649 wme->wme_flags &= ~WME_F_AGGRMODE;
1650 ieee80211_wme_updateparams(ic);
1651 wme->wme_hipri_traffic =
1652 wme->wme_hipri_switch_hysteresis;
1653 } else
1654 wme->wme_hipri_traffic = 0;
1655 } else {
1656 if (wme->wme_hipri_traffic <=
1657 wme->wme_hipri_switch_thresh) {
1658 IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
1659 "%s: traffic %u, enable aggressive mode\n",
1660 __func__, wme->wme_hipri_traffic);
1661 wme->wme_flags |= WME_F_AGGRMODE;
1662 ieee80211_wme_updateparams(ic);
1663 wme->wme_hipri_traffic = 0;
1664 } else
1665 wme->wme_hipri_traffic =
1666 wme->wme_hipri_switch_hysteresis;
1667 }
1668 if (ic->ic_flags & IEEE80211_F_WMEUPDATE) {
1669 (void) ieee80211_add_wme_param(bo->bo_wme, wme);
1670 ic->ic_flags &= ~IEEE80211_F_WMEUPDATE;
1671 }
1672 }
1673
1674 if (ic->ic_opmode == IEEE80211_M_HOSTAP) { /* NB: no IBSS support*/
1675 struct ieee80211_tim_ie *tie =
1676 (struct ieee80211_tim_ie *) bo->bo_tim;
1677 if (ic->ic_flags & IEEE80211_F_TIMUPDATE) {
1678 u_int timlen, timoff, i;
1679 /*
1680 * ATIM/DTIM needs updating. If it fits in the
1681 * current space allocated then just copy in the
1682 * new bits. Otherwise we need to move any trailing
1683 * data to make room. Note that we know there is
1684 * contiguous space because ieee80211_beacon_allocate
1685 * insures there is space in the mbuf to write a
1686 * maximal-size virtual bitmap (based on ic_max_aid).
1687 */
1688 /*
1689 * Calculate the bitmap size and offset, copy any
1690 * trailer out of the way, and then copy in the
1691 * new bitmap and update the information element.
1692 * Note that the tim bitmap must contain at least
1693 * one byte and any offset must be even.
1694 */
1695 if (ic->ic_ps_pending != 0) {
1696 timoff = 128; /* impossibly large */
1697 for (i = 0; i < ic->ic_tim_len; i++)
1698 if (ic->ic_tim_bitmap[i]) {
1699 timoff = i &~ 1;
1700 break;
1701 }
1702 KASSERT(timoff != 128, ("tim bitmap empty!"));
1703 for (i = ic->ic_tim_len-1; i >= timoff; i--)
1704 if (ic->ic_tim_bitmap[i])
1705 break;
1706 timlen = 1 + (i - timoff);
1707 } else {
1708 timoff = 0;
1709 timlen = 1;
1710 }
1711 if (timlen != bo->bo_tim_len) {
1712 /* copy up/down trailer */
1713 int adjust = tie->tim_bitmap+timlen
1714 - bo->bo_trailer;
1715 ovbcopy(bo->bo_trailer, bo->bo_trailer+adjust,
1716 bo->bo_trailer_len);
1717 bo->bo_trailer += adjust;
1718 bo->bo_wme += adjust;
1719 bo->bo_erp += adjust;
1720 bo->bo_tim_len = timlen;
1721
1722 /* update information element */
1723 tie->tim_len = 3 + timlen;
1724 tie->tim_bitctl = timoff;
1725 len_changed = 1;
1726 }
1727 memcpy(tie->tim_bitmap, ic->ic_tim_bitmap + timoff,
1728 bo->bo_tim_len);
1729
1730 ic->ic_flags &= ~IEEE80211_F_TIMUPDATE;
1731
1732 IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER,
1733 "%s: TIM updated, pending %u, off %u, len %u\n",
1734 __func__, ic->ic_ps_pending, timoff, timlen);
1735 }
1736 /* count down DTIM period */
1737 if (tie->tim_count == 0)
1738 tie->tim_count = tie->tim_period - 1;
1739 else
1740 tie->tim_count--;
1741 /* update state for buffered multicast frames on DTIM */
1742 if (mcast && tie->tim_count == 0)
1743 tie->tim_bitctl |= 1;
1744 else
1745 tie->tim_bitctl &= ~1;
1746 if (ic->ic_flags_ext & IEEE80211_FEXT_ERPUPDATE) {
1747 /*
1748 * ERP element needs updating.
1749 */
1750 (void) ieee80211_add_erp(bo->bo_erp, ic);
1751 ic->ic_flags_ext &= ~IEEE80211_FEXT_ERPUPDATE;
1752 }
1753 }
1754
1755 return len_changed;
1756}
1757
1758/*
1759 * Save an outbound packet for a node in power-save sleep state.
1760 * The new packet is placed on the node's saved queue, and the TIM
1761 * is changed, if necessary.
1762 */
1763void
1764ieee80211_pwrsave(struct ieee80211com *ic, struct ieee80211_node *ni,
1765 struct mbuf *m)
1766{
1767 int qlen, age;
1768
1769 ASSERT_SERIALIZED(ic->ic_ifp->if_serializer);
1770
1771 if (IF_QFULL(&ni->ni_savedq)) {
1772 IF_DROP(&ni->ni_savedq);
1773 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY,
1774 "[%6D] pwr save q overflow, drops %d (size %d)\n",
1775 ni->ni_macaddr, ":",
1776 ni->ni_savedq.ifq_drops, IEEE80211_PS_MAX_QUEUE);
1777#ifdef IEEE80211_DEBUG
1778 if (ieee80211_msg_dumppkts(ic))
1779 ieee80211_dump_pkt(mtod(m, caddr_t), m->m_len, -1, -1);
1780#endif
1781 m_freem(m);
1782 return;
1783 }
1784 /*
1785 * Tag the frame with it's expiry time and insert
1786 * it in the queue. The aging interval is 4 times
1787 * the listen interval specified by the station.
1788 * Frames that sit around too long are reclaimed
1789 * using this information.
1790 */
34b861de
SZ
1791 /* TU -> secs. XXX handle overflow? */
1792 age = IEEE80211_TU_TO_MS((ni->ni_intval * ic->ic_bintval) << 2) / 1000;
841ab66c
SZ
1793 _IEEE80211_NODE_SAVEQ_ENQUEUE(ni, m, qlen, age);
1794
1795 IEEE80211_DPRINTF(ic, IEEE80211_MSG_POWER,
1796 "[%6D] save frame with age %d, %u now queued\n",
1797 ni->ni_macaddr, ":", age, qlen);
1798
1799 if (qlen == 1)
1800 ic->ic_set_tim(ni, 1);
1801}