1 /*-
2 * Copyright (c) 2001 Atsushi Onoe
3 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
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 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD: releng/8.0/sys/net80211/ieee80211_proto.c 195618 2009-07-11 15:02:45Z rpaulo $");
29
30 /*
31 * IEEE 802.11 protocol support.
32 */
33
34 #include "opt_inet.h"
35 #include "opt_wlan.h"
36
37 #include <sys/param.h>
38 #include <sys/kernel.h>
39 #include <sys/systm.h>
40
41 #include <sys/socket.h>
42 #include <sys/sockio.h>
43
44 #include <net/if.h>
45 #include <net/if_media.h>
46 #include <net/ethernet.h> /* XXX for ether_sprintf */
47
48 #include <net80211/ieee80211_var.h>
49 #include <net80211/ieee80211_adhoc.h>
50 #include <net80211/ieee80211_sta.h>
51 #include <net80211/ieee80211_hostap.h>
52 #include <net80211/ieee80211_wds.h>
53 #ifdef IEEE80211_SUPPORT_MESH
54 #include <net80211/ieee80211_mesh.h>
55 #endif
56 #include <net80211/ieee80211_monitor.h>
57 #include <net80211/ieee80211_input.h>
58
59 /* XXX tunables */
60 #define AGGRESSIVE_MODE_SWITCH_HYSTERESIS 3 /* pkts / 100ms */
61 #define HIGH_PRI_SWITCH_THRESH 10 /* pkts / 100ms */
62
63 const char *ieee80211_mgt_subtype_name[] = {
64 "assoc_req", "assoc_resp", "reassoc_req", "reassoc_resp",
65 "probe_req", "probe_resp", "reserved#6", "reserved#7",
66 "beacon", "atim", "disassoc", "auth",
67 "deauth", "action", "reserved#14", "reserved#15"
68 };
69 const char *ieee80211_ctl_subtype_name[] = {
70 "reserved#0", "reserved#1", "reserved#2", "reserved#3",
71 "reserved#3", "reserved#5", "reserved#6", "reserved#7",
72 "reserved#8", "reserved#9", "ps_poll", "rts",
73 "cts", "ack", "cf_end", "cf_end_ack"
74 };
75 const char *ieee80211_opmode_name[IEEE80211_OPMODE_MAX] = {
76 "IBSS", /* IEEE80211_M_IBSS */
77 "STA", /* IEEE80211_M_STA */
78 "WDS", /* IEEE80211_M_WDS */
79 "AHDEMO", /* IEEE80211_M_AHDEMO */
80 "HOSTAP", /* IEEE80211_M_HOSTAP */
81 "MONITOR", /* IEEE80211_M_MONITOR */
82 "MBSS" /* IEEE80211_M_MBSS */
83 };
84 const char *ieee80211_state_name[IEEE80211_S_MAX] = {
85 "INIT", /* IEEE80211_S_INIT */
86 "SCAN", /* IEEE80211_S_SCAN */
87 "AUTH", /* IEEE80211_S_AUTH */
88 "ASSOC", /* IEEE80211_S_ASSOC */
89 "CAC", /* IEEE80211_S_CAC */
90 "RUN", /* IEEE80211_S_RUN */
91 "CSA", /* IEEE80211_S_CSA */
92 "SLEEP", /* IEEE80211_S_SLEEP */
93 };
94 const char *ieee80211_wme_acnames[] = {
95 "WME_AC_BE",
96 "WME_AC_BK",
97 "WME_AC_VI",
98 "WME_AC_VO",
99 "WME_UPSD",
100 };
101
102 static void beacon_miss(void *, int);
103 static void beacon_swmiss(void *, int);
104 static void parent_updown(void *, int);
105 static void update_mcast(void *, int);
106 static void update_promisc(void *, int);
107 static void update_channel(void *, int);
108 static void ieee80211_newstate_cb(void *, int);
109 static int ieee80211_new_state_locked(struct ieee80211vap *,
110 enum ieee80211_state, int);
111
112 static int
113 null_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
114 const struct ieee80211_bpf_params *params)
115 {
116 struct ifnet *ifp = ni->ni_ic->ic_ifp;
117
118 if_printf(ifp, "missing ic_raw_xmit callback, drop frame\n");
119 m_freem(m);
120 return ENETDOWN;
121 }
122
123 void
124 ieee80211_proto_attach(struct ieee80211com *ic)
125 {
126 struct ifnet *ifp = ic->ic_ifp;
127
128 /* override the 802.3 setting */
129 ifp->if_hdrlen = ic->ic_headroom
130 + sizeof(struct ieee80211_qosframe_addr4)
131 + IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN
132 + IEEE80211_WEP_EXTIVLEN;
133 /* XXX no way to recalculate on ifdetach */
134 if (ALIGN(ifp->if_hdrlen) > max_linkhdr) {
135 /* XXX sanity check... */
136 max_linkhdr = ALIGN(ifp->if_hdrlen);
137 max_hdr = max_linkhdr + max_protohdr;
138 max_datalen = MHLEN - max_hdr;
139 }
140 ic->ic_protmode = IEEE80211_PROT_CTSONLY;
141
142 TASK_INIT(&ic->ic_parent_task, 0, parent_updown, ifp);
143 TASK_INIT(&ic->ic_mcast_task, 0, update_mcast, ic);
144 TASK_INIT(&ic->ic_promisc_task, 0, update_promisc, ic);
145 TASK_INIT(&ic->ic_chan_task, 0, update_channel, ic);
146 TASK_INIT(&ic->ic_bmiss_task, 0, beacon_miss, ic);
147
148 ic->ic_wme.wme_hipri_switch_hysteresis =
149 AGGRESSIVE_MODE_SWITCH_HYSTERESIS;
150
151 /* initialize management frame handlers */
152 ic->ic_send_mgmt = ieee80211_send_mgmt;
153 ic->ic_raw_xmit = null_raw_xmit;
154
155 ieee80211_adhoc_attach(ic);
156 ieee80211_sta_attach(ic);
157 ieee80211_wds_attach(ic);
158 ieee80211_hostap_attach(ic);
159 #ifdef IEEE80211_SUPPORT_MESH
160 ieee80211_mesh_attach(ic);
161 #endif
162 ieee80211_monitor_attach(ic);
163 }
164
165 void
166 ieee80211_proto_detach(struct ieee80211com *ic)
167 {
168 ieee80211_monitor_detach(ic);
169 #ifdef IEEE80211_SUPPORT_MESH
170 ieee80211_mesh_detach(ic);
171 #endif
172 ieee80211_hostap_detach(ic);
173 ieee80211_wds_detach(ic);
174 ieee80211_adhoc_detach(ic);
175 ieee80211_sta_detach(ic);
176 }
177
178 static void
179 null_update_beacon(struct ieee80211vap *vap, int item)
180 {
181 }
182
183 void
184 ieee80211_proto_vattach(struct ieee80211vap *vap)
185 {
186 struct ieee80211com *ic = vap->iv_ic;
187 struct ifnet *ifp = vap->iv_ifp;
188 int i;
189
190 /* override the 802.3 setting */
191 ifp->if_hdrlen = ic->ic_ifp->if_hdrlen;
192
193 vap->iv_rtsthreshold = IEEE80211_RTS_DEFAULT;
194 vap->iv_fragthreshold = IEEE80211_FRAG_DEFAULT;
195 vap->iv_bmiss_max = IEEE80211_BMISS_MAX;
196 callout_init(&vap->iv_swbmiss, CALLOUT_MPSAFE);
197 callout_init(&vap->iv_mgtsend, CALLOUT_MPSAFE);
198 TASK_INIT(&vap->iv_nstate_task, 0, ieee80211_newstate_cb, vap);
199 TASK_INIT(&vap->iv_swbmiss_task, 0, beacon_swmiss, vap);
200 /*
201 * Install default tx rate handling: no fixed rate, lowest
202 * supported rate for mgmt and multicast frames. Default
203 * max retry count. These settings can be changed by the
204 * driver and/or user applications.
205 */
206 for (i = IEEE80211_MODE_11A; i < IEEE80211_MODE_MAX; i++) {
207 const struct ieee80211_rateset *rs = &ic->ic_sup_rates[i];
208
209 vap->iv_txparms[i].ucastrate = IEEE80211_FIXED_RATE_NONE;
210 if (i == IEEE80211_MODE_11NA || i == IEEE80211_MODE_11NG) {
211 vap->iv_txparms[i].mgmtrate = 0 | IEEE80211_RATE_MCS;
212 vap->iv_txparms[i].mcastrate = 0 | IEEE80211_RATE_MCS;
213 } else {
214 vap->iv_txparms[i].mgmtrate =
215 rs->rs_rates[0] & IEEE80211_RATE_VAL;
216 vap->iv_txparms[i].mcastrate =
217 rs->rs_rates[0] & IEEE80211_RATE_VAL;
218 }
219 vap->iv_txparms[i].maxretry = IEEE80211_TXMAX_DEFAULT;
220 }
221 vap->iv_roaming = IEEE80211_ROAMING_AUTO;
222
223 vap->iv_update_beacon = null_update_beacon;
224 vap->iv_deliver_data = ieee80211_deliver_data;
225
226 /* attach support for operating mode */
227 ic->ic_vattach[vap->iv_opmode](vap);
228 }
229
230 void
231 ieee80211_proto_vdetach(struct ieee80211vap *vap)
232 {
233 #define FREEAPPIE(ie) do { \
234 if (ie != NULL) \
235 free(ie, M_80211_NODE_IE); \
236 } while (0)
237 /*
238 * Detach operating mode module.
239 */
240 if (vap->iv_opdetach != NULL)
241 vap->iv_opdetach(vap);
242 /*
243 * This should not be needed as we detach when reseting
244 * the state but be conservative here since the
245 * authenticator may do things like spawn kernel threads.
246 */
247 if (vap->iv_auth->ia_detach != NULL)
248 vap->iv_auth->ia_detach(vap);
249 /*
250 * Detach any ACL'ator.
251 */
252 if (vap->iv_acl != NULL)
253 vap->iv_acl->iac_detach(vap);
254
255 FREEAPPIE(vap->iv_appie_beacon);
256 FREEAPPIE(vap->iv_appie_probereq);
257 FREEAPPIE(vap->iv_appie_proberesp);
258 FREEAPPIE(vap->iv_appie_assocreq);
259 FREEAPPIE(vap->iv_appie_assocresp);
260 FREEAPPIE(vap->iv_appie_wpa);
261 #undef FREEAPPIE
262 }
263
264 /*
265 * Simple-minded authenticator module support.
266 */
267
268 #define IEEE80211_AUTH_MAX (IEEE80211_AUTH_WPA+1)
269 /* XXX well-known names */
270 static const char *auth_modnames[IEEE80211_AUTH_MAX] = {
271 "wlan_internal", /* IEEE80211_AUTH_NONE */
272 "wlan_internal", /* IEEE80211_AUTH_OPEN */
273 "wlan_internal", /* IEEE80211_AUTH_SHARED */
274 "wlan_xauth", /* IEEE80211_AUTH_8021X */
275 "wlan_internal", /* IEEE80211_AUTH_AUTO */
276 "wlan_xauth", /* IEEE80211_AUTH_WPA */
277 };
278 static const struct ieee80211_authenticator *authenticators[IEEE80211_AUTH_MAX];
279
280 static const struct ieee80211_authenticator auth_internal = {
281 .ia_name = "wlan_internal",
282 .ia_attach = NULL,
283 .ia_detach = NULL,
284 .ia_node_join = NULL,
285 .ia_node_leave = NULL,
286 };
287
288 /*
289 * Setup internal authenticators once; they are never unregistered.
290 */
291 static void
292 ieee80211_auth_setup(void)
293 {
294 ieee80211_authenticator_register(IEEE80211_AUTH_OPEN, &auth_internal);
295 ieee80211_authenticator_register(IEEE80211_AUTH_SHARED, &auth_internal);
296 ieee80211_authenticator_register(IEEE80211_AUTH_AUTO, &auth_internal);
297 }
298 SYSINIT(wlan_auth, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_auth_setup, NULL);
299
300 const struct ieee80211_authenticator *
301 ieee80211_authenticator_get(int auth)
302 {
303 if (auth >= IEEE80211_AUTH_MAX)
304 return NULL;
305 if (authenticators[auth] == NULL)
306 ieee80211_load_module(auth_modnames[auth]);
307 return authenticators[auth];
308 }
309
310 void
311 ieee80211_authenticator_register(int type,
312 const struct ieee80211_authenticator *auth)
313 {
314 if (type >= IEEE80211_AUTH_MAX)
315 return;
316 authenticators[type] = auth;
317 }
318
319 void
320 ieee80211_authenticator_unregister(int type)
321 {
322
323 if (type >= IEEE80211_AUTH_MAX)
324 return;
325 authenticators[type] = NULL;
326 }
327
328 /*
329 * Very simple-minded ACL module support.
330 */
331 /* XXX just one for now */
332 static const struct ieee80211_aclator *acl = NULL;
333
334 void
335 ieee80211_aclator_register(const struct ieee80211_aclator *iac)
336 {
337 printf("wlan: %s acl policy registered\n", iac->iac_name);
338 acl = iac;
339 }
340
341 void
342 ieee80211_aclator_unregister(const struct ieee80211_aclator *iac)
343 {
344 if (acl == iac)
345 acl = NULL;
346 printf("wlan: %s acl policy unregistered\n", iac->iac_name);
347 }
348
349 const struct ieee80211_aclator *
350 ieee80211_aclator_get(const char *name)
351 {
352 if (acl == NULL)
353 ieee80211_load_module("wlan_acl");
354 return acl != NULL && strcmp(acl->iac_name, name) == 0 ? acl : NULL;
355 }
356
357 void
358 ieee80211_print_essid(const uint8_t *essid, int len)
359 {
360 const uint8_t *p;
361 int i;
362
363 if (len > IEEE80211_NWID_LEN)
364 len = IEEE80211_NWID_LEN;
365 /* determine printable or not */
366 for (i = 0, p = essid; i < len; i++, p++) {
367 if (*p < ' ' || *p > 0x7e)
368 break;
369 }
370 if (i == len) {
371 printf("\"");
372 for (i = 0, p = essid; i < len; i++, p++)
373 printf("%c", *p);
374 printf("\"");
375 } else {
376 printf("0x");
377 for (i = 0, p = essid; i < len; i++, p++)
378 printf("%02x", *p);
379 }
380 }
381
382 void
383 ieee80211_dump_pkt(struct ieee80211com *ic,
384 const uint8_t *buf, int len, int rate, int rssi)
385 {
386 const struct ieee80211_frame *wh;
387 int i;
388
389 wh = (const struct ieee80211_frame *)buf;
390 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) {
391 case IEEE80211_FC1_DIR_NODS:
392 printf("NODS %s", ether_sprintf(wh->i_addr2));
393 printf("->%s", ether_sprintf(wh->i_addr1));
394 printf("(%s)", ether_sprintf(wh->i_addr3));
395 break;
396 case IEEE80211_FC1_DIR_TODS:
397 printf("TODS %s", ether_sprintf(wh->i_addr2));
398 printf("->%s", ether_sprintf(wh->i_addr3));
399 printf("(%s)", ether_sprintf(wh->i_addr1));
400 break;
401 case IEEE80211_FC1_DIR_FROMDS:
402 printf("FRDS %s", ether_sprintf(wh->i_addr3));
403 printf("->%s", ether_sprintf(wh->i_addr1));
404 printf("(%s)", ether_sprintf(wh->i_addr2));
405 break;
406 case IEEE80211_FC1_DIR_DSTODS:
407 printf("DSDS %s", ether_sprintf((const uint8_t *)&wh[1]));
408 printf("->%s", ether_sprintf(wh->i_addr3));
409 printf("(%s", ether_sprintf(wh->i_addr2));
410 printf("->%s)", ether_sprintf(wh->i_addr1));
411 break;
412 }
413 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) {
414 case IEEE80211_FC0_TYPE_DATA:
415 printf(" data");
416 break;
417 case IEEE80211_FC0_TYPE_MGT:
418 printf(" %s", ieee80211_mgt_subtype_name[
419 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK)
420 >> IEEE80211_FC0_SUBTYPE_SHIFT]);
421 break;
422 default:
423 printf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK);
424 break;
425 }
426 if (IEEE80211_QOS_HAS_SEQ(wh)) {
427 const struct ieee80211_qosframe *qwh =
428 (const struct ieee80211_qosframe *)buf;
429 printf(" QoS [TID %u%s]", qwh->i_qos[0] & IEEE80211_QOS_TID,
430 qwh->i_qos[0] & IEEE80211_QOS_ACKPOLICY ? " ACM" : "");
431 }
432 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
433 int off;
434
435 off = ieee80211_anyhdrspace(ic, wh);
436 printf(" WEP [IV %.02x %.02x %.02x",
437 buf[off+0], buf[off+1], buf[off+2]);
438 if (buf[off+IEEE80211_WEP_IVLEN] & IEEE80211_WEP_EXTIV)
439 printf(" %.02x %.02x %.02x",
440 buf[off+4], buf[off+5], buf[off+6]);
441 printf(" KID %u]", buf[off+IEEE80211_WEP_IVLEN] >> 6);
442 }
443 if (rate >= 0)
444 printf(" %dM", rate / 2);
445 if (rssi >= 0)
446 printf(" +%d", rssi);
447 printf("\n");
448 if (len > 0) {
449 for (i = 0; i < len; i++) {
450 if ((i & 1) == 0)
451 printf(" ");
452 printf("%02x", buf[i]);
453 }
454 printf("\n");
455 }
456 }
457
458 static __inline int
459 findrix(const struct ieee80211_rateset *rs, int r)
460 {
461 int i;
462
463 for (i = 0; i < rs->rs_nrates; i++)
464 if ((rs->rs_rates[i] & IEEE80211_RATE_VAL) == r)
465 return i;
466 return -1;
467 }
468
469 int
470 ieee80211_fix_rate(struct ieee80211_node *ni,
471 struct ieee80211_rateset *nrs, int flags)
472 {
473 #define RV(v) ((v) & IEEE80211_RATE_VAL)
474 struct ieee80211vap *vap = ni->ni_vap;
475 struct ieee80211com *ic = ni->ni_ic;
476 int i, j, rix, error;
477 int okrate, badrate, fixedrate, ucastrate;
478 const struct ieee80211_rateset *srs;
479 uint8_t r;
480
481 error = 0;
482 okrate = badrate = 0;
483 ucastrate = vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)].ucastrate;
484 if (ucastrate != IEEE80211_FIXED_RATE_NONE) {
485 /*
486 * Workaround awkwardness with fixed rate. We are called
487 * to check both the legacy rate set and the HT rate set
488 * but we must apply any legacy fixed rate check only to the
489 * legacy rate set and vice versa. We cannot tell what type
490 * of rate set we've been given (legacy or HT) but we can
491 * distinguish the fixed rate type (MCS have 0x80 set).
492 * So to deal with this the caller communicates whether to
493 * check MCS or legacy rate using the flags and we use the
494 * type of any fixed rate to avoid applying an MCS to a
495 * legacy rate and vice versa.
496 */
497 if (ucastrate & 0x80) {
498 if (flags & IEEE80211_F_DOFRATE)
499 flags &= ~IEEE80211_F_DOFRATE;
500 } else if ((ucastrate & 0x80) == 0) {
501 if (flags & IEEE80211_F_DOFMCS)
502 flags &= ~IEEE80211_F_DOFMCS;
503 }
504 /* NB: required to make MCS match below work */
505 ucastrate &= IEEE80211_RATE_VAL;
506 }
507 fixedrate = IEEE80211_FIXED_RATE_NONE;
508 /*
509 * XXX we are called to process both MCS and legacy rates;
510 * we must use the appropriate basic rate set or chaos will
511 * ensue; for now callers that want MCS must supply
512 * IEEE80211_F_DOBRS; at some point we'll need to split this
513 * function so there are two variants, one for MCS and one
514 * for legacy rates.
515 */
516 if (flags & IEEE80211_F_DOBRS)
517 srs = (const struct ieee80211_rateset *)
518 ieee80211_get_suphtrates(ic, ni->ni_chan);
519 else
520 srs = ieee80211_get_suprates(ic, ni->ni_chan);
521 for (i = 0; i < nrs->rs_nrates; ) {
522 if (flags & IEEE80211_F_DOSORT) {
523 /*
524 * Sort rates.
525 */
526 for (j = i + 1; j < nrs->rs_nrates; j++) {
527 if (RV(nrs->rs_rates[i]) > RV(nrs->rs_rates[j])) {
528 r = nrs->rs_rates[i];
529 nrs->rs_rates[i] = nrs->rs_rates[j];
530 nrs->rs_rates[j] = r;
531 }
532 }
533 }
534 r = nrs->rs_rates[i] & IEEE80211_RATE_VAL;
535 badrate = r;
536 /*
537 * Check for fixed rate.
538 */
539 if (r == ucastrate)
540 fixedrate = r;
541 /*
542 * Check against supported rates.
543 */
544 rix = findrix(srs, r);
545 if (flags & IEEE80211_F_DONEGO) {
546 if (rix < 0) {
547 /*
548 * A rate in the node's rate set is not
549 * supported. If this is a basic rate and we
550 * are operating as a STA then this is an error.
551 * Otherwise we just discard/ignore the rate.
552 */
553 if ((flags & IEEE80211_F_JOIN) &&
554 (nrs->rs_rates[i] & IEEE80211_RATE_BASIC))
555 error++;
556 } else if ((flags & IEEE80211_F_JOIN) == 0) {
557 /*
558 * Overwrite with the supported rate
559 * value so any basic rate bit is set.
560 */
561 nrs->rs_rates[i] = srs->rs_rates[rix];
562 }
563 }
564 if ((flags & IEEE80211_F_DODEL) && rix < 0) {
565 /*
566 * Delete unacceptable rates.
567 */
568 nrs->rs_nrates--;
569 for (j = i; j < nrs->rs_nrates; j++)
570 nrs->rs_rates[j] = nrs->rs_rates[j + 1];
571 nrs->rs_rates[j] = 0;
572 continue;
573 }
574 if (rix >= 0)
575 okrate = nrs->rs_rates[i];
576 i++;
577 }
578 if (okrate == 0 || error != 0 ||
579 ((flags & (IEEE80211_F_DOFRATE|IEEE80211_F_DOFMCS)) &&
580 fixedrate != ucastrate)) {
581 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni,
582 "%s: flags 0x%x okrate %d error %d fixedrate 0x%x "
583 "ucastrate %x\n", __func__, fixedrate, ucastrate, flags);
584 return badrate | IEEE80211_RATE_BASIC;
585 } else
586 return RV(okrate);
587 #undef RV
588 }
589
590 /*
591 * Reset 11g-related state.
592 */
593 void
594 ieee80211_reset_erp(struct ieee80211com *ic)
595 {
596 ic->ic_flags &= ~IEEE80211_F_USEPROT;
597 ic->ic_nonerpsta = 0;
598 ic->ic_longslotsta = 0;
599 /*
600 * Short slot time is enabled only when operating in 11g
601 * and not in an IBSS. We must also honor whether or not
602 * the driver is capable of doing it.
603 */
604 ieee80211_set_shortslottime(ic,
605 IEEE80211_IS_CHAN_A(ic->ic_curchan) ||
606 IEEE80211_IS_CHAN_HT(ic->ic_curchan) ||
607 (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
608 ic->ic_opmode == IEEE80211_M_HOSTAP &&
609 (ic->ic_caps & IEEE80211_C_SHSLOT)));
610 /*
611 * Set short preamble and ERP barker-preamble flags.
612 */
613 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) ||
614 (ic->ic_caps & IEEE80211_C_SHPREAMBLE)) {
615 ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
616 ic->ic_flags &= ~IEEE80211_F_USEBARKER;
617 } else {
618 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
619 ic->ic_flags |= IEEE80211_F_USEBARKER;
620 }
621 }
622
623 /*
624 * Set the short slot time state and notify the driver.
625 */
626 void
627 ieee80211_set_shortslottime(struct ieee80211com *ic, int onoff)
628 {
629 if (onoff)
630 ic->ic_flags |= IEEE80211_F_SHSLOT;
631 else
632 ic->ic_flags &= ~IEEE80211_F_SHSLOT;
633 /* notify driver */
634 if (ic->ic_updateslot != NULL)
635 ic->ic_updateslot(ic->ic_ifp);
636 }
637
638 /*
639 * Check if the specified rate set supports ERP.
640 * NB: the rate set is assumed to be sorted.
641 */
642 int
643 ieee80211_iserp_rateset(const struct ieee80211_rateset *rs)
644 {
645 #define N(a) (sizeof(a) / sizeof(a[0]))
646 static const int rates[] = { 2, 4, 11, 22, 12, 24, 48 };
647 int i, j;
648
649 if (rs->rs_nrates < N(rates))
650 return 0;
651 for (i = 0; i < N(rates); i++) {
652 for (j = 0; j < rs->rs_nrates; j++) {
653 int r = rs->rs_rates[j] & IEEE80211_RATE_VAL;
654 if (rates[i] == r)
655 goto next;
656 if (r > rates[i])
657 return 0;
658 }
659 return 0;
660 next:
661 ;
662 }
663 return 1;
664 #undef N
665 }
666
667 /*
668 * Mark the basic rates for the rate table based on the
669 * operating mode. For real 11g we mark all the 11b rates
670 * and 6, 12, and 24 OFDM. For 11b compatibility we mark only
671 * 11b rates. There's also a pseudo 11a-mode used to mark only
672 * the basic OFDM rates.
673 */
674 static void
675 setbasicrates(struct ieee80211_rateset *rs,
676 enum ieee80211_phymode mode, int add)
677 {
678 static const struct ieee80211_rateset basic[IEEE80211_MODE_MAX] = {
679 [IEEE80211_MODE_11A] = { 3, { 12, 24, 48 } },
680 [IEEE80211_MODE_11B] = { 2, { 2, 4 } },
681 /* NB: mixed b/g */
682 [IEEE80211_MODE_11G] = { 4, { 2, 4, 11, 22 } },
683 [IEEE80211_MODE_TURBO_A] = { 3, { 12, 24, 48 } },
684 [IEEE80211_MODE_TURBO_G] = { 4, { 2, 4, 11, 22 } },
685 [IEEE80211_MODE_STURBO_A] = { 3, { 12, 24, 48 } },
686 [IEEE80211_MODE_HALF] = { 3, { 6, 12, 24 } },
687 [IEEE80211_MODE_QUARTER] = { 3, { 3, 6, 12 } },
688 [IEEE80211_MODE_11NA] = { 3, { 12, 24, 48 } },
689 /* NB: mixed b/g */
690 [IEEE80211_MODE_11NG] = { 4, { 2, 4, 11, 22 } },
691 };
692 int i, j;
693
694 for (i = 0; i < rs->rs_nrates; i++) {
695 if (!add)
696 rs->rs_rates[i] &= IEEE80211_RATE_VAL;
697 for (j = 0; j < basic[mode].rs_nrates; j++)
698 if (basic[mode].rs_rates[j] == rs->rs_rates[i]) {
699 rs->rs_rates[i] |= IEEE80211_RATE_BASIC;
700 break;
701 }
702 }
703 }
704
705 /*
706 * Set the basic rates in a rate set.
707 */
708 void
709 ieee80211_setbasicrates(struct ieee80211_rateset *rs,
710 enum ieee80211_phymode mode)
711 {
712 setbasicrates(rs, mode, 0);
713 }
714
715 /*
716 * Add basic rates to a rate set.
717 */
718 void
719 ieee80211_addbasicrates(struct ieee80211_rateset *rs,
720 enum ieee80211_phymode mode)
721 {
722 setbasicrates(rs, mode, 1);
723 }
724
725 /*
726 * WME protocol support.
727 *
728 * The default 11a/b/g/n parameters come from the WiFi Alliance WMM
729 * System Interopability Test Plan (v1.4, Appendix F) and the 802.11n
730 * Draft 2.0 Test Plan (Appendix D).
731 *
732 * Static/Dynamic Turbo mode settings come from Atheros.
733 */
734 typedef struct phyParamType {
735 uint8_t aifsn;
736 uint8_t logcwmin;
737 uint8_t logcwmax;
738 uint16_t txopLimit;
739 uint8_t acm;
740 } paramType;
741
742 static const struct phyParamType phyParamForAC_BE[IEEE80211_MODE_MAX] = {
743 [IEEE80211_MODE_AUTO] = { 3, 4, 6, 0, 0 },
744 [IEEE80211_MODE_11A] = { 3, 4, 6, 0, 0 },
745 [IEEE80211_MODE_11B] = { 3, 4, 6, 0, 0 },
746 [IEEE80211_MODE_11G] = { 3, 4, 6, 0, 0 },
747 [IEEE80211_MODE_FH] = { 3, 4, 6, 0, 0 },
748 [IEEE80211_MODE_TURBO_A]= { 2, 3, 5, 0, 0 },
749 [IEEE80211_MODE_TURBO_G]= { 2, 3, 5, 0, 0 },
750 [IEEE80211_MODE_STURBO_A]={ 2, 3, 5, 0, 0 },
751 [IEEE80211_MODE_HALF] = { 3, 4, 6, 0, 0 },
752 [IEEE80211_MODE_QUARTER]= { 3, 4, 6, 0, 0 },
753 [IEEE80211_MODE_11NA] = { 3, 4, 6, 0, 0 },
754 [IEEE80211_MODE_11NG] = { 3, 4, 6, 0, 0 },
755 };
756 static const struct phyParamType phyParamForAC_BK[IEEE80211_MODE_MAX] = {
757 [IEEE80211_MODE_AUTO] = { 7, 4, 10, 0, 0 },
758 [IEEE80211_MODE_11A] = { 7, 4, 10, 0, 0 },
759 [IEEE80211_MODE_11B] = { 7, 4, 10, 0, 0 },
760 [IEEE80211_MODE_11G] = { 7, 4, 10, 0, 0 },
761 [IEEE80211_MODE_FH] = { 7, 4, 10, 0, 0 },
762 [IEEE80211_MODE_TURBO_A]= { 7, 3, 10, 0, 0 },
763 [IEEE80211_MODE_TURBO_G]= { 7, 3, 10, 0, 0 },
764 [IEEE80211_MODE_STURBO_A]={ 7, 3, 10, 0, 0 },
765 [IEEE80211_MODE_HALF] = { 7, 4, 10, 0, 0 },
766 [IEEE80211_MODE_QUARTER]= { 7, 4, 10, 0, 0 },
767 [IEEE80211_MODE_11NA] = { 7, 4, 10, 0, 0 },
768 [IEEE80211_MODE_11NG] = { 7, 4, 10, 0, 0 },
769 };
770 static const struct phyParamType phyParamForAC_VI[IEEE80211_MODE_MAX] = {
771 [IEEE80211_MODE_AUTO] = { 1, 3, 4, 94, 0 },
772 [IEEE80211_MODE_11A] = { 1, 3, 4, 94, 0 },
773 [IEEE80211_MODE_11B] = { 1, 3, 4, 188, 0 },
774 [IEEE80211_MODE_11G] = { 1, 3, 4, 94, 0 },
775 [IEEE80211_MODE_FH] = { 1, 3, 4, 188, 0 },
776 [IEEE80211_MODE_TURBO_A]= { 1, 2, 3, 94, 0 },
777 [IEEE80211_MODE_TURBO_G]= { 1, 2, 3, 94, 0 },
778 [IEEE80211_MODE_STURBO_A]={ 1, 2, 3, 94, 0 },
779 [IEEE80211_MODE_HALF] = { 1, 3, 4, 94, 0 },
780 [IEEE80211_MODE_QUARTER]= { 1, 3, 4, 94, 0 },
781 [IEEE80211_MODE_11NA] = { 1, 3, 4, 94, 0 },
782 [IEEE80211_MODE_11NG] = { 1, 3, 4, 94, 0 },
783 };
784 static const struct phyParamType phyParamForAC_VO[IEEE80211_MODE_MAX] = {
785 [IEEE80211_MODE_AUTO] = { 1, 2, 3, 47, 0 },
786 [IEEE80211_MODE_11A] = { 1, 2, 3, 47, 0 },
787 [IEEE80211_MODE_11B] = { 1, 2, 3, 102, 0 },
788 [IEEE80211_MODE_11G] = { 1, 2, 3, 47, 0 },
789 [IEEE80211_MODE_FH] = { 1, 2, 3, 102, 0 },
790 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 },
791 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 },
792 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 },
793 [IEEE80211_MODE_HALF] = { 1, 2, 3, 47, 0 },
794 [IEEE80211_MODE_QUARTER]= { 1, 2, 3, 47, 0 },
795 [IEEE80211_MODE_11NA] = { 1, 2, 3, 47, 0 },
796 [IEEE80211_MODE_11NG] = { 1, 2, 3, 47, 0 },
797 };
798
799 static const struct phyParamType bssPhyParamForAC_BE[IEEE80211_MODE_MAX] = {
800 [IEEE80211_MODE_AUTO] = { 3, 4, 10, 0, 0 },
801 [IEEE80211_MODE_11A] = { 3, 4, 10, 0, 0 },
802 [IEEE80211_MODE_11B] = { 3, 4, 10, 0, 0 },
803 [IEEE80211_MODE_11G] = { 3, 4, 10, 0, 0 },
804 [IEEE80211_MODE_FH] = { 3, 4, 10, 0, 0 },
805 [IEEE80211_MODE_TURBO_A]= { 2, 3, 10, 0, 0 },
806 [IEEE80211_MODE_TURBO_G]= { 2, 3, 10, 0, 0 },
807 [IEEE80211_MODE_STURBO_A]={ 2, 3, 10, 0, 0 },
808 [IEEE80211_MODE_HALF] = { 3, 4, 10, 0, 0 },
809 [IEEE80211_MODE_QUARTER]= { 3, 4, 10, 0, 0 },
810 [IEEE80211_MODE_11NA] = { 3, 4, 10, 0, 0 },
811 [IEEE80211_MODE_11NG] = { 3, 4, 10, 0, 0 },
812 };
813 static const struct phyParamType bssPhyParamForAC_VI[IEEE80211_MODE_MAX] = {
814 [IEEE80211_MODE_AUTO] = { 2, 3, 4, 94, 0 },
815 [IEEE80211_MODE_11A] = { 2, 3, 4, 94, 0 },
816 [IEEE80211_MODE_11B] = { 2, 3, 4, 188, 0 },
817 [IEEE80211_MODE_11G] = { 2, 3, 4, 94, 0 },
818 [IEEE80211_MODE_FH] = { 2, 3, 4, 188, 0 },
819 [IEEE80211_MODE_TURBO_A]= { 2, 2, 3, 94, 0 },
820 [IEEE80211_MODE_TURBO_G]= { 2, 2, 3, 94, 0 },
821 [IEEE80211_MODE_STURBO_A]={ 2, 2, 3, 94, 0 },
822 [IEEE80211_MODE_HALF] = { 2, 3, 4, 94, 0 },
823 [IEEE80211_MODE_QUARTER]= { 2, 3, 4, 94, 0 },
824 [IEEE80211_MODE_11NA] = { 2, 3, 4, 94, 0 },
825 [IEEE80211_MODE_11NG] = { 2, 3, 4, 94, 0 },
826 };
827 static const struct phyParamType bssPhyParamForAC_VO[IEEE80211_MODE_MAX] = {
828 [IEEE80211_MODE_AUTO] = { 2, 2, 3, 47, 0 },
829 [IEEE80211_MODE_11A] = { 2, 2, 3, 47, 0 },
830 [IEEE80211_MODE_11B] = { 2, 2, 3, 102, 0 },
831 [IEEE80211_MODE_11G] = { 2, 2, 3, 47, 0 },
832 [IEEE80211_MODE_FH] = { 2, 2, 3, 102, 0 },
833 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 },
834 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 },
835 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 },
836 [IEEE80211_MODE_HALF] = { 2, 2, 3, 47, 0 },
837 [IEEE80211_MODE_QUARTER]= { 2, 2, 3, 47, 0 },
838 [IEEE80211_MODE_11NA] = { 2, 2, 3, 47, 0 },
839 [IEEE80211_MODE_11NG] = { 2, 2, 3, 47, 0 },
840 };
841
842 static void
843 _setifsparams(struct wmeParams *wmep, const paramType *phy)
844 {
845 wmep->wmep_aifsn = phy->aifsn;
846 wmep->wmep_logcwmin = phy->logcwmin;
847 wmep->wmep_logcwmax = phy->logcwmax;
848 wmep->wmep_txopLimit = phy->txopLimit;
849 }
850
851 static void
852 setwmeparams(struct ieee80211vap *vap, const char *type, int ac,
853 struct wmeParams *wmep, const paramType *phy)
854 {
855 wmep->wmep_acm = phy->acm;
856 _setifsparams(wmep, phy);
857
858 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
859 "set %s (%s) [acm %u aifsn %u logcwmin %u logcwmax %u txop %u]\n",
860 ieee80211_wme_acnames[ac], type,
861 wmep->wmep_acm, wmep->wmep_aifsn, wmep->wmep_logcwmin,
862 wmep->wmep_logcwmax, wmep->wmep_txopLimit);
863 }
864
865 static void
866 ieee80211_wme_initparams_locked(struct ieee80211vap *vap)
867 {
868 struct ieee80211com *ic = vap->iv_ic;
869 struct ieee80211_wme_state *wme = &ic->ic_wme;
870 const paramType *pPhyParam, *pBssPhyParam;
871 struct wmeParams *wmep;
872 enum ieee80211_phymode mode;
873 int i;
874
875 IEEE80211_LOCK_ASSERT(ic);
876
877 if ((ic->ic_caps & IEEE80211_C_WME) == 0 || ic->ic_nrunning > 1)
878 return;
879
880 /*
881 * Select mode; we can be called early in which case we
882 * always use auto mode. We know we'll be called when
883 * entering the RUN state with bsschan setup properly
884 * so state will eventually get set correctly
885 */
886 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC)
887 mode = ieee80211_chan2mode(ic->ic_bsschan);
888 else
889 mode = IEEE80211_MODE_AUTO;
890 for (i = 0; i < WME_NUM_AC; i++) {
891 switch (i) {
892 case WME_AC_BK:
893 pPhyParam = &phyParamForAC_BK[mode];
894 pBssPhyParam = &phyParamForAC_BK[mode];
895 break;
896 case WME_AC_VI:
897 pPhyParam = &phyParamForAC_VI[mode];
898 pBssPhyParam = &bssPhyParamForAC_VI[mode];
899 break;
900 case WME_AC_VO:
901 pPhyParam = &phyParamForAC_VO[mode];
902 pBssPhyParam = &bssPhyParamForAC_VO[mode];
903 break;
904 case WME_AC_BE:
905 default:
906 pPhyParam = &phyParamForAC_BE[mode];
907 pBssPhyParam = &bssPhyParamForAC_BE[mode];
908 break;
909 }
910 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i];
911 if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
912 setwmeparams(vap, "chan", i, wmep, pPhyParam);
913 } else {
914 setwmeparams(vap, "chan", i, wmep, pBssPhyParam);
915 }
916 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i];
917 setwmeparams(vap, "bss ", i, wmep, pBssPhyParam);
918 }
919 /* NB: check ic_bss to avoid NULL deref on initial attach */
920 if (vap->iv_bss != NULL) {
921 /*
922 * Calculate agressive mode switching threshold based
923 * on beacon interval. This doesn't need locking since
924 * we're only called before entering the RUN state at
925 * which point we start sending beacon frames.
926 */
927 wme->wme_hipri_switch_thresh =
928 (HIGH_PRI_SWITCH_THRESH * vap->iv_bss->ni_intval) / 100;
929 wme->wme_flags &= ~WME_F_AGGRMODE;
930 ieee80211_wme_updateparams(vap);
931 }
932 }
933
934 void
935 ieee80211_wme_initparams(struct ieee80211vap *vap)
936 {
937 struct ieee80211com *ic = vap->iv_ic;
938
939 IEEE80211_LOCK(ic);
940 ieee80211_wme_initparams_locked(vap);
941 IEEE80211_UNLOCK(ic);
942 }
943
944 /*
945 * Update WME parameters for ourself and the BSS.
946 */
947 void
948 ieee80211_wme_updateparams_locked(struct ieee80211vap *vap)
949 {
950 static const paramType aggrParam[IEEE80211_MODE_MAX] = {
951 [IEEE80211_MODE_AUTO] = { 2, 4, 10, 64, 0 },
952 [IEEE80211_MODE_11A] = { 2, 4, 10, 64, 0 },
953 [IEEE80211_MODE_11B] = { 2, 5, 10, 64, 0 },
954 [IEEE80211_MODE_11G] = { 2, 4, 10, 64, 0 },
955 [IEEE80211_MODE_FH] = { 2, 5, 10, 64, 0 },
956 [IEEE80211_MODE_TURBO_A] = { 1, 3, 10, 64, 0 },
957 [IEEE80211_MODE_TURBO_G] = { 1, 3, 10, 64, 0 },
958 [IEEE80211_MODE_STURBO_A] = { 1, 3, 10, 64, 0 },
959 [IEEE80211_MODE_HALF] = { 2, 4, 10, 64, 0 },
960 [IEEE80211_MODE_QUARTER] = { 2, 4, 10, 64, 0 },
961 [IEEE80211_MODE_11NA] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/
962 [IEEE80211_MODE_11NG] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/
963 };
964 struct ieee80211com *ic = vap->iv_ic;
965 struct ieee80211_wme_state *wme = &ic->ic_wme;
966 const struct wmeParams *wmep;
967 struct wmeParams *chanp, *bssp;
968 enum ieee80211_phymode mode;
969 int i;
970
971 /*
972 * Set up the channel access parameters for the physical
973 * device. First populate the configured settings.
974 */
975 for (i = 0; i < WME_NUM_AC; i++) {
976 chanp = &wme->wme_chanParams.cap_wmeParams[i];
977 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i];
978 chanp->wmep_aifsn = wmep->wmep_aifsn;
979 chanp->wmep_logcwmin = wmep->wmep_logcwmin;
980 chanp->wmep_logcwmax = wmep->wmep_logcwmax;
981 chanp->wmep_txopLimit = wmep->wmep_txopLimit;
982
983 chanp = &wme->wme_bssChanParams.cap_wmeParams[i];
984 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i];
985 chanp->wmep_aifsn = wmep->wmep_aifsn;
986 chanp->wmep_logcwmin = wmep->wmep_logcwmin;
987 chanp->wmep_logcwmax = wmep->wmep_logcwmax;
988 chanp->wmep_txopLimit = wmep->wmep_txopLimit;
989 }
990
991 /*
992 * Select mode; we can be called early in which case we
993 * always use auto mode. We know we'll be called when
994 * entering the RUN state with bsschan setup properly
995 * so state will eventually get set correctly
996 */
997 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC)
998 mode = ieee80211_chan2mode(ic->ic_bsschan);
999 else
1000 mode = IEEE80211_MODE_AUTO;
1001
1002 /*
1003 * This implements agressive mode as found in certain
1004 * vendors' AP's. When there is significant high
1005 * priority (VI/VO) traffic in the BSS throttle back BE
1006 * traffic by using conservative parameters. Otherwise
1007 * BE uses agressive params to optimize performance of
1008 * legacy/non-QoS traffic.
1009 */
1010 if ((vap->iv_opmode == IEEE80211_M_HOSTAP &&
1011 (wme->wme_flags & WME_F_AGGRMODE) != 0) ||
1012 (vap->iv_opmode == IEEE80211_M_STA &&
1013 (vap->iv_bss->ni_flags & IEEE80211_NODE_QOS) == 0) ||
1014 (vap->iv_flags & IEEE80211_F_WME) == 0) {
1015 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE];
1016 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE];
1017
1018 chanp->wmep_aifsn = bssp->wmep_aifsn = aggrParam[mode].aifsn;
1019 chanp->wmep_logcwmin = bssp->wmep_logcwmin =
1020 aggrParam[mode].logcwmin;
1021 chanp->wmep_logcwmax = bssp->wmep_logcwmax =
1022 aggrParam[mode].logcwmax;
1023 chanp->wmep_txopLimit = bssp->wmep_txopLimit =
1024 (vap->iv_flags & IEEE80211_F_BURST) ?
1025 aggrParam[mode].txopLimit : 0;
1026 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1027 "update %s (chan+bss) [acm %u aifsn %u logcwmin %u "
1028 "logcwmax %u txop %u]\n", ieee80211_wme_acnames[WME_AC_BE],
1029 chanp->wmep_acm, chanp->wmep_aifsn, chanp->wmep_logcwmin,
1030 chanp->wmep_logcwmax, chanp->wmep_txopLimit);
1031 }
1032
1033 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
1034 ic->ic_sta_assoc < 2 && (wme->wme_flags & WME_F_AGGRMODE) != 0) {
1035 static const uint8_t logCwMin[IEEE80211_MODE_MAX] = {
1036 [IEEE80211_MODE_AUTO] = 3,
1037 [IEEE80211_MODE_11A] = 3,
1038 [IEEE80211_MODE_11B] = 4,
1039 [IEEE80211_MODE_11G] = 3,
1040 [IEEE80211_MODE_FH] = 4,
1041 [IEEE80211_MODE_TURBO_A] = 3,
1042 [IEEE80211_MODE_TURBO_G] = 3,
1043 [IEEE80211_MODE_STURBO_A] = 3,
1044 [IEEE80211_MODE_HALF] = 3,
1045 [IEEE80211_MODE_QUARTER] = 3,
1046 [IEEE80211_MODE_11NA] = 3,
1047 [IEEE80211_MODE_11NG] = 3,
1048 };
1049 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE];
1050 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE];
1051
1052 chanp->wmep_logcwmin = bssp->wmep_logcwmin = logCwMin[mode];
1053 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1054 "update %s (chan+bss) logcwmin %u\n",
1055 ieee80211_wme_acnames[WME_AC_BE], chanp->wmep_logcwmin);
1056 }
1057 if (vap->iv_opmode == IEEE80211_M_HOSTAP) { /* XXX ibss? */
1058 /*
1059 * Arrange for a beacon update and bump the parameter
1060 * set number so associated stations load the new values.
1061 */
1062 wme->wme_bssChanParams.cap_info =
1063 (wme->wme_bssChanParams.cap_info+1) & WME_QOSINFO_COUNT;
1064 ieee80211_beacon_notify(vap, IEEE80211_BEACON_WME);
1065 }
1066
1067 wme->wme_update(ic);
1068
1069 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1070 "%s: WME params updated, cap_info 0x%x\n", __func__,
1071 vap->iv_opmode == IEEE80211_M_STA ?
1072 wme->wme_wmeChanParams.cap_info :
1073 wme->wme_bssChanParams.cap_info);
1074 }
1075
1076 void
1077 ieee80211_wme_updateparams(struct ieee80211vap *vap)
1078 {
1079 struct ieee80211com *ic = vap->iv_ic;
1080
1081 if (ic->ic_caps & IEEE80211_C_WME) {
1082 IEEE80211_LOCK(ic);
1083 ieee80211_wme_updateparams_locked(vap);
1084 IEEE80211_UNLOCK(ic);
1085 }
1086 }
1087
1088 static void
1089 parent_updown(void *arg, int npending)
1090 {
1091 struct ifnet *parent = arg;
1092
1093 parent->if_ioctl(parent, SIOCSIFFLAGS, NULL);
1094 }
1095
1096 static void
1097 update_mcast(void *arg, int npending)
1098 {
1099 struct ieee80211com *ic = arg;
1100 struct ifnet *parent = ic->ic_ifp;
1101
1102 ic->ic_update_mcast(parent);
1103 }
1104
1105 static void
1106 update_promisc(void *arg, int npending)
1107 {
1108 struct ieee80211com *ic = arg;
1109 struct ifnet *parent = ic->ic_ifp;
1110
1111 ic->ic_update_promisc(parent);
1112 }
1113
1114 static void
1115 update_channel(void *arg, int npending)
1116 {
1117 struct ieee80211com *ic = arg;
1118
1119 ic->ic_set_channel(ic);
1120 ieee80211_radiotap_chan_change(ic);
1121 }
1122
1123 /*
1124 * Block until the parent is in a known state. This is
1125 * used after any operations that dispatch a task (e.g.
1126 * to auto-configure the parent device up/down).
1127 */
1128 void
1129 ieee80211_waitfor_parent(struct ieee80211com *ic)
1130 {
1131 taskqueue_block(ic->ic_tq);
1132 ieee80211_draintask(ic, &ic->ic_parent_task);
1133 ieee80211_draintask(ic, &ic->ic_mcast_task);
1134 ieee80211_draintask(ic, &ic->ic_promisc_task);
1135 ieee80211_draintask(ic, &ic->ic_chan_task);
1136 ieee80211_draintask(ic, &ic->ic_bmiss_task);
1137 taskqueue_unblock(ic->ic_tq);
1138 }
1139
1140 /*
1141 * Start a vap running. If this is the first vap to be
1142 * set running on the underlying device then we
1143 * automatically bring the device up.
1144 */
1145 void
1146 ieee80211_start_locked(struct ieee80211vap *vap)
1147 {
1148 struct ifnet *ifp = vap->iv_ifp;
1149 struct ieee80211com *ic = vap->iv_ic;
1150 struct ifnet *parent = ic->ic_ifp;
1151
1152 IEEE80211_LOCK_ASSERT(ic);
1153
1154 IEEE80211_DPRINTF(vap,
1155 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1156 "start running, %d vaps running\n", ic->ic_nrunning);
1157
1158 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
1159 /*
1160 * Mark us running. Note that it's ok to do this first;
1161 * if we need to bring the parent device up we defer that
1162 * to avoid dropping the com lock. We expect the device
1163 * to respond to being marked up by calling back into us
1164 * through ieee80211_start_all at which point we'll come
1165 * back in here and complete the work.
1166 */
1167 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1168 /*
1169 * We are not running; if this we are the first vap
1170 * to be brought up auto-up the parent if necessary.
1171 */
1172 if (ic->ic_nrunning++ == 0 &&
1173 (parent->if_drv_flags & IFF_DRV_RUNNING) == 0) {
1174 IEEE80211_DPRINTF(vap,
1175 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1176 "%s: up parent %s\n", __func__, parent->if_xname);
1177 parent->if_flags |= IFF_UP;
1178 ieee80211_runtask(ic, &ic->ic_parent_task);
1179 return;
1180 }
1181 }
1182 /*
1183 * If the parent is up and running, then kick the
1184 * 802.11 state machine as appropriate.
1185 */
1186 if ((parent->if_drv_flags & IFF_DRV_RUNNING) &&
1187 vap->iv_roaming != IEEE80211_ROAMING_MANUAL) {
1188 if (vap->iv_opmode == IEEE80211_M_STA) {
1189 #if 0
1190 /* XXX bypasses scan too easily; disable for now */
1191 /*
1192 * Try to be intelligent about clocking the state
1193 * machine. If we're currently in RUN state then
1194 * we should be able to apply any new state/parameters
1195 * simply by re-associating. Otherwise we need to
1196 * re-scan to select an appropriate ap.
1197 */
1198 if (vap->iv_state >= IEEE80211_S_RUN)
1199 ieee80211_new_state_locked(vap,
1200 IEEE80211_S_ASSOC, 1);
1201 else
1202 #endif
1203 ieee80211_new_state_locked(vap,
1204 IEEE80211_S_SCAN, 0);
1205 } else {
1206 /*
1207 * For monitor+wds mode there's nothing to do but
1208 * start running. Otherwise if this is the first
1209 * vap to be brought up, start a scan which may be
1210 * preempted if the station is locked to a particular
1211 * channel.
1212 */
1213 vap->iv_flags_ext |= IEEE80211_FEXT_REINIT;
1214 if (vap->iv_opmode == IEEE80211_M_MONITOR ||
1215 vap->iv_opmode == IEEE80211_M_WDS)
1216 ieee80211_new_state_locked(vap,
1217 IEEE80211_S_RUN, -1);
1218 else
1219 ieee80211_new_state_locked(vap,
1220 IEEE80211_S_SCAN, 0);
1221 }
1222 }
1223 }
1224
1225 /*
1226 * Start a single vap.
1227 */
1228 void
1229 ieee80211_init(void *arg)
1230 {
1231 struct ieee80211vap *vap = arg;
1232
1233 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1234 "%s\n", __func__);
1235
1236 IEEE80211_LOCK(vap->iv_ic);
1237 ieee80211_start_locked(vap);
1238 IEEE80211_UNLOCK(vap->iv_ic);
1239 }
1240
1241 /*
1242 * Start all runnable vap's on a device.
1243 */
1244 void
1245 ieee80211_start_all(struct ieee80211com *ic)
1246 {
1247 struct ieee80211vap *vap;
1248
1249 IEEE80211_LOCK(ic);
1250 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1251 struct ifnet *ifp = vap->iv_ifp;
1252 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */
1253 ieee80211_start_locked(vap);
1254 }
1255 IEEE80211_UNLOCK(ic);
1256 }
1257
1258 /*
1259 * Stop a vap. We force it down using the state machine
1260 * then mark it's ifnet not running. If this is the last
1261 * vap running on the underlying device then we close it
1262 * too to insure it will be properly initialized when the
1263 * next vap is brought up.
1264 */
1265 void
1266 ieee80211_stop_locked(struct ieee80211vap *vap)
1267 {
1268 struct ieee80211com *ic = vap->iv_ic;
1269 struct ifnet *ifp = vap->iv_ifp;
1270 struct ifnet *parent = ic->ic_ifp;
1271
1272 IEEE80211_LOCK_ASSERT(ic);
1273
1274 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1275 "stop running, %d vaps running\n", ic->ic_nrunning);
1276
1277 ieee80211_new_state_locked(vap, IEEE80211_S_INIT, -1);
1278 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
1279 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; /* mark us stopped */
1280 if (--ic->ic_nrunning == 0 &&
1281 (parent->if_drv_flags & IFF_DRV_RUNNING)) {
1282 IEEE80211_DPRINTF(vap,
1283 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1284 "down parent %s\n", parent->if_xname);
1285 parent->if_flags &= ~IFF_UP;
1286 ieee80211_runtask(ic, &ic->ic_parent_task);
1287 }
1288 }
1289 }
1290
1291 void
1292 ieee80211_stop(struct ieee80211vap *vap)
1293 {
1294 struct ieee80211com *ic = vap->iv_ic;
1295
1296 IEEE80211_LOCK(ic);
1297 ieee80211_stop_locked(vap);
1298 IEEE80211_UNLOCK(ic);
1299 }
1300
1301 /*
1302 * Stop all vap's running on a device.
1303 */
1304 void
1305 ieee80211_stop_all(struct ieee80211com *ic)
1306 {
1307 struct ieee80211vap *vap;
1308
1309 IEEE80211_LOCK(ic);
1310 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1311 struct ifnet *ifp = vap->iv_ifp;
1312 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */
1313 ieee80211_stop_locked(vap);
1314 }
1315 IEEE80211_UNLOCK(ic);
1316
1317 ieee80211_waitfor_parent(ic);
1318 }
1319
1320 /*
1321 * Stop all vap's running on a device and arrange
1322 * for those that were running to be resumed.
1323 */
1324 void
1325 ieee80211_suspend_all(struct ieee80211com *ic)
1326 {
1327 struct ieee80211vap *vap;
1328
1329 IEEE80211_LOCK(ic);
1330 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1331 struct ifnet *ifp = vap->iv_ifp;
1332 if (IFNET_IS_UP_RUNNING(ifp)) { /* NB: avoid recursion */
1333 vap->iv_flags_ext |= IEEE80211_FEXT_RESUME;
1334 ieee80211_stop_locked(vap);
1335 }
1336 }
1337 IEEE80211_UNLOCK(ic);
1338
1339 ieee80211_waitfor_parent(ic);
1340 }
1341
1342 /*
1343 * Start all vap's marked for resume.
1344 */
1345 void
1346 ieee80211_resume_all(struct ieee80211com *ic)
1347 {
1348 struct ieee80211vap *vap;
1349
1350 IEEE80211_LOCK(ic);
1351 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1352 struct ifnet *ifp = vap->iv_ifp;
1353 if (!IFNET_IS_UP_RUNNING(ifp) &&
1354 (vap->iv_flags_ext & IEEE80211_FEXT_RESUME)) {
1355 vap->iv_flags_ext &= ~IEEE80211_FEXT_RESUME;
1356 ieee80211_start_locked(vap);
1357 }
1358 }
1359 IEEE80211_UNLOCK(ic);
1360 }
1361
1362 void
1363 ieee80211_beacon_miss(struct ieee80211com *ic)
1364 {
1365 IEEE80211_LOCK(ic);
1366 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1367 /* Process in a taskq, the handler may reenter the driver */
1368 ieee80211_runtask(ic, &ic->ic_bmiss_task);
1369 }
1370 IEEE80211_UNLOCK(ic);
1371 }
1372
1373 static void
1374 beacon_miss(void *arg, int npending)
1375 {
1376 struct ieee80211com *ic = arg;
1377 struct ieee80211vap *vap;
1378
1379 /* XXX locking */
1380 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1381 /*
1382 * We only pass events through for sta vap's in RUN state;
1383 * may be too restrictive but for now this saves all the
1384 * handlers duplicating these checks.
1385 */
1386 if (vap->iv_opmode == IEEE80211_M_STA &&
1387 vap->iv_state >= IEEE80211_S_RUN &&
1388 vap->iv_bmiss != NULL)
1389 vap->iv_bmiss(vap);
1390 }
1391 }
1392
1393 static void
1394 beacon_swmiss(void *arg, int npending)
1395 {
1396 struct ieee80211vap *vap = arg;
1397
1398 if (vap->iv_state != IEEE80211_S_RUN)
1399 return;
1400
1401 /* XXX Call multiple times if npending > zero? */
1402 vap->iv_bmiss(vap);
1403 }
1404
1405 /*
1406 * Software beacon miss handling. Check if any beacons
1407 * were received in the last period. If not post a
1408 * beacon miss; otherwise reset the counter.
1409 */
1410 void
1411 ieee80211_swbmiss(void *arg)
1412 {
1413 struct ieee80211vap *vap = arg;
1414 struct ieee80211com *ic = vap->iv_ic;
1415
1416 /* XXX sleep state? */
1417 KASSERT(vap->iv_state == IEEE80211_S_RUN,
1418 ("wrong state %d", vap->iv_state));
1419
1420 if (ic->ic_flags & IEEE80211_F_SCAN) {
1421 /*
1422 * If scanning just ignore and reset state. If we get a
1423 * bmiss after coming out of scan because we haven't had
1424 * time to receive a beacon then we should probe the AP
1425 * before posting a real bmiss (unless iv_bmiss_max has
1426 * been artifiically lowered). A cleaner solution might
1427 * be to disable the timer on scan start/end but to handle
1428 * case of multiple sta vap's we'd need to disable the
1429 * timers of all affected vap's.
1430 */
1431 vap->iv_swbmiss_count = 0;
1432 } else if (vap->iv_swbmiss_count == 0) {
1433 if (vap->iv_bmiss != NULL)
1434 ieee80211_runtask(ic, &vap->iv_swbmiss_task);
1435 if (vap->iv_bmiss_count == 0) /* don't re-arm timer */
1436 return;
1437 } else
1438 vap->iv_swbmiss_count = 0;
1439 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period,
1440 ieee80211_swbmiss, vap);
1441 }
1442
1443 /*
1444 * Start an 802.11h channel switch. We record the parameters,
1445 * mark the operation pending, notify each vap through the
1446 * beacon update mechanism so it can update the beacon frame
1447 * contents, and then switch vap's to CSA state to block outbound
1448 * traffic. Devices that handle CSA directly can use the state
1449 * switch to do the right thing so long as they call
1450 * ieee80211_csa_completeswitch when it's time to complete the
1451 * channel change. Devices that depend on the net80211 layer can
1452 * use ieee80211_beacon_update to handle the countdown and the
1453 * channel switch.
1454 */
1455 void
1456 ieee80211_csa_startswitch(struct ieee80211com *ic,
1457 struct ieee80211_channel *c, int mode, int count)
1458 {
1459 struct ieee80211vap *vap;
1460
1461 IEEE80211_LOCK_ASSERT(ic);
1462
1463 ic->ic_csa_newchan = c;
1464 ic->ic_csa_mode = mode;
1465 ic->ic_csa_count = count;
1466 ic->ic_flags |= IEEE80211_F_CSAPENDING;
1467 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1468 if (vap->iv_opmode == IEEE80211_M_HOSTAP ||
1469 vap->iv_opmode == IEEE80211_M_IBSS ||
1470 vap->iv_opmode == IEEE80211_M_MBSS)
1471 ieee80211_beacon_notify(vap, IEEE80211_BEACON_CSA);
1472 /* switch to CSA state to block outbound traffic */
1473 if (vap->iv_state == IEEE80211_S_RUN)
1474 ieee80211_new_state_locked(vap, IEEE80211_S_CSA, 0);
1475 }
1476 ieee80211_notify_csa(ic, c, mode, count);
1477 }
1478
1479 static void
1480 csa_completeswitch(struct ieee80211com *ic)
1481 {
1482 struct ieee80211vap *vap;
1483
1484 ic->ic_csa_newchan = NULL;
1485 ic->ic_flags &= ~IEEE80211_F_CSAPENDING;
1486
1487 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1488 if (vap->iv_state == IEEE80211_S_CSA)
1489 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0);
1490 }
1491
1492 /*
1493 * Complete an 802.11h channel switch started by ieee80211_csa_startswitch.
1494 * We clear state and move all vap's in CSA state to RUN state
1495 * so they can again transmit.
1496 */
1497 void
1498 ieee80211_csa_completeswitch(struct ieee80211com *ic)
1499 {
1500 IEEE80211_LOCK_ASSERT(ic);
1501
1502 KASSERT(ic->ic_flags & IEEE80211_F_CSAPENDING, ("csa not pending"));
1503
1504 ieee80211_setcurchan(ic, ic->ic_csa_newchan);
1505 csa_completeswitch(ic);
1506 }
1507
1508 /*
1509 * Cancel an 802.11h channel switch started by ieee80211_csa_startswitch.
1510 * We clear state and move all vap's in CSA state to RUN state
1511 * so they can again transmit.
1512 */
1513 void
1514 ieee80211_csa_cancelswitch(struct ieee80211com *ic)
1515 {
1516 IEEE80211_LOCK_ASSERT(ic);
1517
1518 csa_completeswitch(ic);
1519 }
1520
1521 /*
1522 * Complete a DFS CAC started by ieee80211_dfs_cac_start.
1523 * We clear state and move all vap's in CAC state to RUN state.
1524 */
1525 void
1526 ieee80211_cac_completeswitch(struct ieee80211vap *vap0)
1527 {
1528 struct ieee80211com *ic = vap0->iv_ic;
1529 struct ieee80211vap *vap;
1530
1531 IEEE80211_LOCK(ic);
1532 /*
1533 * Complete CAC state change for lead vap first; then
1534 * clock all the other vap's waiting.
1535 */
1536 KASSERT(vap0->iv_state == IEEE80211_S_CAC,
1537 ("wrong state %d", vap0->iv_state));
1538 ieee80211_new_state_locked(vap0, IEEE80211_S_RUN, 0);
1539
1540 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1541 if (vap->iv_state == IEEE80211_S_CAC)
1542 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0);
1543 IEEE80211_UNLOCK(ic);
1544 }
1545
1546 /*
1547 * Force all vap's other than the specified vap to the INIT state
1548 * and mark them as waiting for a scan to complete. These vaps
1549 * will be brought up when the scan completes and the scanning vap
1550 * reaches RUN state by wakeupwaiting.
1551 */
1552 static void
1553 markwaiting(struct ieee80211vap *vap0)
1554 {
1555 struct ieee80211com *ic = vap0->iv_ic;
1556 struct ieee80211vap *vap;
1557
1558 IEEE80211_LOCK_ASSERT(ic);
1559
1560 /*
1561 * A vap list entry can not disappear since we are running on the
1562 * taskqueue and a vap destroy will queue and drain another state
1563 * change task.
1564 */
1565 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1566 if (vap == vap0)
1567 continue;
1568 if (vap->iv_state != IEEE80211_S_INIT) {
1569 /* NB: iv_newstate may drop the lock */
1570 vap->iv_newstate(vap, IEEE80211_S_INIT, 0);
1571 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT;
1572 }
1573 }
1574 }
1575
1576 /*
1577 * Wakeup all vap's waiting for a scan to complete. This is the
1578 * companion to markwaiting (above) and is used to coordinate
1579 * multiple vaps scanning.
1580 * This is called from the state taskqueue.
1581 */
1582 static void
1583 wakeupwaiting(struct ieee80211vap *vap0)
1584 {
1585 struct ieee80211com *ic = vap0->iv_ic;
1586 struct ieee80211vap *vap;
1587
1588 IEEE80211_LOCK_ASSERT(ic);
1589
1590 /*
1591 * A vap list entry can not disappear since we are running on the
1592 * taskqueue and a vap destroy will queue and drain another state
1593 * change task.
1594 */
1595 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1596 if (vap == vap0)
1597 continue;
1598 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANWAIT) {
1599 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT;
1600 /* NB: sta's cannot go INIT->RUN */
1601 /* NB: iv_newstate may drop the lock */
1602 vap->iv_newstate(vap,
1603 vap->iv_opmode == IEEE80211_M_STA ?
1604 IEEE80211_S_SCAN : IEEE80211_S_RUN, 0);
1605 }
1606 }
1607 }
1608
1609 /*
1610 * Handle post state change work common to all operating modes.
1611 */
1612 static void
1613 ieee80211_newstate_cb(void *xvap, int npending)
1614 {
1615 struct ieee80211vap *vap = xvap;
1616 struct ieee80211com *ic = vap->iv_ic;
1617 enum ieee80211_state nstate, ostate;
1618 int arg, rc;
1619
1620 IEEE80211_LOCK(ic);
1621 nstate = vap->iv_nstate;
1622 arg = vap->iv_nstate_arg;
1623
1624 if (vap->iv_flags_ext & IEEE80211_FEXT_REINIT) {
1625 /*
1626 * We have been requested to drop back to the INIT before
1627 * proceeding to the new state.
1628 */
1629 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1630 "%s: %s -> %s arg %d\n", __func__,
1631 ieee80211_state_name[vap->iv_state],
1632 ieee80211_state_name[IEEE80211_S_INIT], arg);
1633 vap->iv_newstate(vap, IEEE80211_S_INIT, arg);
1634 vap->iv_flags_ext &= ~IEEE80211_FEXT_REINIT;
1635 }
1636
1637 ostate = vap->iv_state;
1638 if (nstate == IEEE80211_S_SCAN && ostate != IEEE80211_S_INIT) {
1639 /*
1640 * SCAN was forced; e.g. on beacon miss. Force other running
1641 * vap's to INIT state and mark them as waiting for the scan to
1642 * complete. This insures they don't interfere with our
1643 * scanning. Since we are single threaded the vaps can not
1644 * transition again while we are executing.
1645 *
1646 * XXX not always right, assumes ap follows sta
1647 */
1648 markwaiting(vap);
1649 }
1650 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1651 "%s: %s -> %s arg %d\n", __func__,
1652 ieee80211_state_name[ostate], ieee80211_state_name[nstate], arg);
1653
1654 rc = vap->iv_newstate(vap, nstate, arg);
1655 vap->iv_flags_ext &= ~IEEE80211_FEXT_STATEWAIT;
1656 if (rc != 0) {
1657 /* State transition failed */
1658 KASSERT(rc != EINPROGRESS, ("iv_newstate was deferred"));
1659 KASSERT(nstate != IEEE80211_S_INIT,
1660 ("INIT state change failed"));
1661 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1662 "%s: %s returned error %d\n", __func__,
1663 ieee80211_state_name[nstate], rc);
1664 goto done;
1665 }
1666
1667 /* No actual transition, skip post processing */
1668 if (ostate == nstate)
1669 goto done;
1670
1671 if (nstate == IEEE80211_S_RUN) {
1672 /*
1673 * OACTIVE may be set on the vap if the upper layer
1674 * tried to transmit (e.g. IPv6 NDP) before we reach
1675 * RUN state. Clear it and restart xmit.
1676 *
1677 * Note this can also happen as a result of SLEEP->RUN
1678 * (i.e. coming out of power save mode).
1679 */
1680 vap->iv_ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
1681 if_start(vap->iv_ifp);
1682
1683 /* bring up any vaps waiting on us */
1684 wakeupwaiting(vap);
1685 } else if (nstate == IEEE80211_S_INIT) {
1686 /*
1687 * Flush the scan cache if we did the last scan (XXX?)
1688 * and flush any frames on send queues from this vap.
1689 * Note the mgt q is used only for legacy drivers and
1690 * will go away shortly.
1691 */
1692 ieee80211_scan_flush(vap);
1693
1694 /* XXX NB: cast for altq */
1695 ieee80211_flush_ifq((struct ifqueue *)&ic->ic_ifp->if_snd, vap);
1696 }
1697 done:
1698 IEEE80211_UNLOCK(ic);
1699 }
1700
1701 /*
1702 * Public interface for initiating a state machine change.
1703 * This routine single-threads the request and coordinates
1704 * the scheduling of multiple vaps for the purpose of selecting
1705 * an operating channel. Specifically the following scenarios
1706 * are handled:
1707 * o only one vap can be selecting a channel so on transition to
1708 * SCAN state if another vap is already scanning then
1709 * mark the caller for later processing and return without
1710 * doing anything (XXX? expectations by caller of synchronous operation)
1711 * o only one vap can be doing CAC of a channel so on transition to
1712 * CAC state if another vap is already scanning for radar then
1713 * mark the caller for later processing and return without
1714 * doing anything (XXX? expectations by caller of synchronous operation)
1715 * o if another vap is already running when a request is made
1716 * to SCAN then an operating channel has been chosen; bypass
1717 * the scan and just join the channel
1718 *
1719 * Note that the state change call is done through the iv_newstate
1720 * method pointer so any driver routine gets invoked. The driver
1721 * will normally call back into operating mode-specific
1722 * ieee80211_newstate routines (below) unless it needs to completely
1723 * bypass the state machine (e.g. because the firmware has it's
1724 * own idea how things should work). Bypassing the net80211 layer
1725 * is usually a mistake and indicates lack of proper integration
1726 * with the net80211 layer.
1727 */
1728 static int
1729 ieee80211_new_state_locked(struct ieee80211vap *vap,
1730 enum ieee80211_state nstate, int arg)
1731 {
1732 struct ieee80211com *ic = vap->iv_ic;
1733 struct ieee80211vap *vp;
1734 enum ieee80211_state ostate;
1735 int nrunning, nscanning;
1736
1737 IEEE80211_LOCK_ASSERT(ic);
1738
1739 if (vap->iv_flags_ext & IEEE80211_FEXT_STATEWAIT) {
1740 if (vap->iv_nstate == IEEE80211_S_INIT) {
1741 /*
1742 * XXX The vap is being stopped, do no allow any other
1743 * state changes until this is completed.
1744 */
1745 return -1;
1746 } else if (vap->iv_state != vap->iv_nstate) {
1747 #if 0
1748 /* Warn if the previous state hasn't completed. */
1749 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1750 "%s: pending %s -> %s transition lost\n", __func__,
1751 ieee80211_state_name[vap->iv_state],
1752 ieee80211_state_name[vap->iv_nstate]);
1753 #else
1754 /* XXX temporarily enable to identify issues */
1755 if_printf(vap->iv_ifp,
1756 "%s: pending %s -> %s transition lost\n",
1757 __func__, ieee80211_state_name[vap->iv_state],
1758 ieee80211_state_name[vap->iv_nstate]);
1759 #endif
1760 }
1761 }
1762
1763 nrunning = nscanning = 0;
1764 /* XXX can track this state instead of calculating */
1765 TAILQ_FOREACH(vp, &ic->ic_vaps, iv_next) {
1766 if (vp != vap) {
1767 if (vp->iv_state >= IEEE80211_S_RUN)
1768 nrunning++;
1769 /* XXX doesn't handle bg scan */
1770 /* NB: CAC+AUTH+ASSOC treated like SCAN */
1771 else if (vp->iv_state > IEEE80211_S_INIT)
1772 nscanning++;
1773 }
1774 }
1775 ostate = vap->iv_state;
1776 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1777 "%s: %s -> %s (nrunning %d nscanning %d)\n", __func__,
1778 ieee80211_state_name[ostate], ieee80211_state_name[nstate],
1779 nrunning, nscanning);
1780 switch (nstate) {
1781 case IEEE80211_S_SCAN:
1782 if (ostate == IEEE80211_S_INIT) {
1783 /*
1784 * INIT -> SCAN happens on initial bringup.
1785 */
1786 KASSERT(!(nscanning && nrunning),
1787 ("%d scanning and %d running", nscanning, nrunning));
1788 if (nscanning) {
1789 /*
1790 * Someone is scanning, defer our state
1791 * change until the work has completed.
1792 */
1793 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1794 "%s: defer %s -> %s\n",
1795 __func__, ieee80211_state_name[ostate],
1796 ieee80211_state_name[nstate]);
1797 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT;
1798 return 0;
1799 }
1800 if (nrunning) {
1801 /*
1802 * Someone is operating; just join the channel
1803 * they have chosen.
1804 */
1805 /* XXX kill arg? */
1806 /* XXX check each opmode, adhoc? */
1807 if (vap->iv_opmode == IEEE80211_M_STA)
1808 nstate = IEEE80211_S_SCAN;
1809 else
1810 nstate = IEEE80211_S_RUN;
1811 #ifdef IEEE80211_DEBUG
1812 if (nstate != IEEE80211_S_SCAN) {
1813 IEEE80211_DPRINTF(vap,
1814 IEEE80211_MSG_STATE,
1815 "%s: override, now %s -> %s\n",
1816 __func__,
1817 ieee80211_state_name[ostate],
1818 ieee80211_state_name[nstate]);
1819 }
1820 #endif
1821 }
1822 }
1823 break;
1824 case IEEE80211_S_RUN:
1825 if (vap->iv_opmode == IEEE80211_M_WDS &&
1826 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) &&
1827 nscanning) {
1828 /*
1829 * Legacy WDS with someone else scanning; don't
1830 * go online until that completes as we should
1831 * follow the other vap to the channel they choose.
1832 */
1833 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1834 "%s: defer %s -> %s (legacy WDS)\n", __func__,
1835 ieee80211_state_name[ostate],
1836 ieee80211_state_name[nstate]);
1837 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT;
1838 return 0;
1839 }
1840 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
1841 IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) &&
1842 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) &&
1843 !IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) {
1844 /*
1845 * This is a DFS channel, transition to CAC state
1846 * instead of RUN. This allows us to initiate
1847 * Channel Availability Check (CAC) as specified
1848 * by 11h/DFS.
1849 */
1850 nstate = IEEE80211_S_CAC;
1851 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1852 "%s: override %s -> %s (DFS)\n", __func__,
1853 ieee80211_state_name[ostate],
1854 ieee80211_state_name[nstate]);
1855 }
1856 break;
1857 case IEEE80211_S_INIT:
1858 /* cancel any scan in progress */
1859 ieee80211_cancel_scan(vap);
1860 if (ostate == IEEE80211_S_INIT ) {
1861 /* XXX don't believe this */
1862 /* INIT -> INIT. nothing to do */
1863 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT;
1864 }
1865 /* fall thru... */
1866 default:
1867 break;
1868 }
1869 /* defer the state change to a thread */
1870 vap->iv_nstate = nstate;
1871 vap->iv_nstate_arg = arg;
1872 vap->iv_flags_ext |= IEEE80211_FEXT_STATEWAIT;
1873 ieee80211_runtask(ic, &vap->iv_nstate_task);
1874 return EINPROGRESS;
1875 }
1876
1877 int
1878 ieee80211_new_state(struct ieee80211vap *vap,
1879 enum ieee80211_state nstate, int arg)
1880 {
1881 struct ieee80211com *ic = vap->iv_ic;
1882 int rc;
1883
1884 IEEE80211_LOCK(ic);
1885 rc = ieee80211_new_state_locked(vap, nstate, arg);
1886 IEEE80211_UNLOCK(ic);
1887 return rc;
1888 }
Cache object: 51f0efb50a405f66741b550a8fc91ff1
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