1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2001 Atsushi Onoe
5 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
6 * Copyright (c) 2012 IEEE
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD: releng/12.0/sys/net80211/ieee80211_proto.c 326737 2017-12-09 23:16:02Z adrian $");
32
33 /*
34 * IEEE 802.11 protocol support.
35 */
36
37 #include "opt_inet.h"
38 #include "opt_wlan.h"
39
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/kernel.h>
43 #include <sys/malloc.h>
44
45 #include <sys/socket.h>
46 #include <sys/sockio.h>
47
48 #include <net/if.h>
49 #include <net/if_var.h>
50 #include <net/if_media.h>
51 #include <net/ethernet.h> /* XXX for ether_sprintf */
52
53 #include <net80211/ieee80211_var.h>
54 #include <net80211/ieee80211_adhoc.h>
55 #include <net80211/ieee80211_sta.h>
56 #include <net80211/ieee80211_hostap.h>
57 #include <net80211/ieee80211_wds.h>
58 #ifdef IEEE80211_SUPPORT_MESH
59 #include <net80211/ieee80211_mesh.h>
60 #endif
61 #include <net80211/ieee80211_monitor.h>
62 #include <net80211/ieee80211_input.h>
63
64 /* XXX tunables */
65 #define AGGRESSIVE_MODE_SWITCH_HYSTERESIS 3 /* pkts / 100ms */
66 #define HIGH_PRI_SWITCH_THRESH 10 /* pkts / 100ms */
67
68 const char *mgt_subtype_name[] = {
69 "assoc_req", "assoc_resp", "reassoc_req", "reassoc_resp",
70 "probe_req", "probe_resp", "timing_adv", "reserved#7",
71 "beacon", "atim", "disassoc", "auth",
72 "deauth", "action", "action_noack", "reserved#15"
73 };
74 const char *ctl_subtype_name[] = {
75 "reserved#0", "reserved#1", "reserved#2", "reserved#3",
76 "reserved#4", "reserved#5", "reserved#6", "control_wrap",
77 "bar", "ba", "ps_poll", "rts",
78 "cts", "ack", "cf_end", "cf_end_ack"
79 };
80 const char *ieee80211_opmode_name[IEEE80211_OPMODE_MAX] = {
81 "IBSS", /* IEEE80211_M_IBSS */
82 "STA", /* IEEE80211_M_STA */
83 "WDS", /* IEEE80211_M_WDS */
84 "AHDEMO", /* IEEE80211_M_AHDEMO */
85 "HOSTAP", /* IEEE80211_M_HOSTAP */
86 "MONITOR", /* IEEE80211_M_MONITOR */
87 "MBSS" /* IEEE80211_M_MBSS */
88 };
89 const char *ieee80211_state_name[IEEE80211_S_MAX] = {
90 "INIT", /* IEEE80211_S_INIT */
91 "SCAN", /* IEEE80211_S_SCAN */
92 "AUTH", /* IEEE80211_S_AUTH */
93 "ASSOC", /* IEEE80211_S_ASSOC */
94 "CAC", /* IEEE80211_S_CAC */
95 "RUN", /* IEEE80211_S_RUN */
96 "CSA", /* IEEE80211_S_CSA */
97 "SLEEP", /* IEEE80211_S_SLEEP */
98 };
99 const char *ieee80211_wme_acnames[] = {
100 "WME_AC_BE",
101 "WME_AC_BK",
102 "WME_AC_VI",
103 "WME_AC_VO",
104 "WME_UPSD",
105 };
106
107
108 /*
109 * Reason code descriptions were (mostly) obtained from
110 * IEEE Std 802.11-2012, pp. 442-445 Table 8-36.
111 */
112 const char *
113 ieee80211_reason_to_string(uint16_t reason)
114 {
115 switch (reason) {
116 case IEEE80211_REASON_UNSPECIFIED:
117 return ("unspecified");
118 case IEEE80211_REASON_AUTH_EXPIRE:
119 return ("previous authentication is expired");
120 case IEEE80211_REASON_AUTH_LEAVE:
121 return ("sending STA is leaving/has left IBSS or ESS");
122 case IEEE80211_REASON_ASSOC_EXPIRE:
123 return ("disassociated due to inactivity");
124 case IEEE80211_REASON_ASSOC_TOOMANY:
125 return ("too many associated STAs");
126 case IEEE80211_REASON_NOT_AUTHED:
127 return ("class 2 frame received from nonauthenticated STA");
128 case IEEE80211_REASON_NOT_ASSOCED:
129 return ("class 3 frame received from nonassociated STA");
130 case IEEE80211_REASON_ASSOC_LEAVE:
131 return ("sending STA is leaving/has left BSS");
132 case IEEE80211_REASON_ASSOC_NOT_AUTHED:
133 return ("STA requesting (re)association is not authenticated");
134 case IEEE80211_REASON_DISASSOC_PWRCAP_BAD:
135 return ("information in the Power Capability element is "
136 "unacceptable");
137 case IEEE80211_REASON_DISASSOC_SUPCHAN_BAD:
138 return ("information in the Supported Channels element is "
139 "unacceptable");
140 case IEEE80211_REASON_IE_INVALID:
141 return ("invalid element");
142 case IEEE80211_REASON_MIC_FAILURE:
143 return ("MIC failure");
144 case IEEE80211_REASON_4WAY_HANDSHAKE_TIMEOUT:
145 return ("4-Way handshake timeout");
146 case IEEE80211_REASON_GROUP_KEY_UPDATE_TIMEOUT:
147 return ("group key update timeout");
148 case IEEE80211_REASON_IE_IN_4WAY_DIFFERS:
149 return ("element in 4-Way handshake different from "
150 "(re)association request/probe response/beacon frame");
151 case IEEE80211_REASON_GROUP_CIPHER_INVALID:
152 return ("invalid group cipher");
153 case IEEE80211_REASON_PAIRWISE_CIPHER_INVALID:
154 return ("invalid pairwise cipher");
155 case IEEE80211_REASON_AKMP_INVALID:
156 return ("invalid AKMP");
157 case IEEE80211_REASON_UNSUPP_RSN_IE_VERSION:
158 return ("unsupported version in RSN IE");
159 case IEEE80211_REASON_INVALID_RSN_IE_CAP:
160 return ("invalid capabilities in RSN IE");
161 case IEEE80211_REASON_802_1X_AUTH_FAILED:
162 return ("IEEE 802.1X authentication failed");
163 case IEEE80211_REASON_CIPHER_SUITE_REJECTED:
164 return ("cipher suite rejected because of the security "
165 "policy");
166 case IEEE80211_REASON_UNSPECIFIED_QOS:
167 return ("unspecified (QoS-related)");
168 case IEEE80211_REASON_INSUFFICIENT_BW:
169 return ("QoS AP lacks sufficient bandwidth for this QoS STA");
170 case IEEE80211_REASON_TOOMANY_FRAMES:
171 return ("too many frames need to be acknowledged");
172 case IEEE80211_REASON_OUTSIDE_TXOP:
173 return ("STA is transmitting outside the limits of its TXOPs");
174 case IEEE80211_REASON_LEAVING_QBSS:
175 return ("requested from peer STA (the STA is "
176 "resetting/leaving the BSS)");
177 case IEEE80211_REASON_BAD_MECHANISM:
178 return ("requested from peer STA (it does not want to use "
179 "the mechanism)");
180 case IEEE80211_REASON_SETUP_NEEDED:
181 return ("requested from peer STA (setup is required for the "
182 "used mechanism)");
183 case IEEE80211_REASON_TIMEOUT:
184 return ("requested from peer STA (timeout)");
185 case IEEE80211_REASON_PEER_LINK_CANCELED:
186 return ("SME cancels the mesh peering instance (not related "
187 "to the maximum number of peer mesh STAs)");
188 case IEEE80211_REASON_MESH_MAX_PEERS:
189 return ("maximum number of peer mesh STAs was reached");
190 case IEEE80211_REASON_MESH_CPVIOLATION:
191 return ("the received information violates the Mesh "
192 "Configuration policy configured in the mesh STA "
193 "profile");
194 case IEEE80211_REASON_MESH_CLOSE_RCVD:
195 return ("the mesh STA has received a Mesh Peering Close "
196 "message requesting to close the mesh peering");
197 case IEEE80211_REASON_MESH_MAX_RETRIES:
198 return ("the mesh STA has resent dot11MeshMaxRetries Mesh "
199 "Peering Open messages, without receiving a Mesh "
200 "Peering Confirm message");
201 case IEEE80211_REASON_MESH_CONFIRM_TIMEOUT:
202 return ("the confirmTimer for the mesh peering instance times "
203 "out");
204 case IEEE80211_REASON_MESH_INVALID_GTK:
205 return ("the mesh STA fails to unwrap the GTK or the values "
206 "in the wrapped contents do not match");
207 case IEEE80211_REASON_MESH_INCONS_PARAMS:
208 return ("the mesh STA receives inconsistent information about "
209 "the mesh parameters between Mesh Peering Management "
210 "frames");
211 case IEEE80211_REASON_MESH_INVALID_SECURITY:
212 return ("the mesh STA fails the authenticated mesh peering "
213 "exchange because due to failure in selecting "
214 "pairwise/group ciphersuite");
215 case IEEE80211_REASON_MESH_PERR_NO_PROXY:
216 return ("the mesh STA does not have proxy information for "
217 "this external destination");
218 case IEEE80211_REASON_MESH_PERR_NO_FI:
219 return ("the mesh STA does not have forwarding information "
220 "for this destination");
221 case IEEE80211_REASON_MESH_PERR_DEST_UNREACH:
222 return ("the mesh STA determines that the link to the next "
223 "hop of an active path in its forwarding information "
224 "is no longer usable");
225 case IEEE80211_REASON_MESH_MAC_ALRDY_EXISTS_MBSS:
226 return ("the MAC address of the STA already exists in the "
227 "mesh BSS");
228 case IEEE80211_REASON_MESH_CHAN_SWITCH_REG:
229 return ("the mesh STA performs channel switch to meet "
230 "regulatory requirements");
231 case IEEE80211_REASON_MESH_CHAN_SWITCH_UNSPEC:
232 return ("the mesh STA performs channel switch with "
233 "unspecified reason");
234 default:
235 return ("reserved/unknown");
236 }
237 }
238
239 static void beacon_miss(void *, int);
240 static void beacon_swmiss(void *, int);
241 static void parent_updown(void *, int);
242 static void update_mcast(void *, int);
243 static void update_promisc(void *, int);
244 static void update_channel(void *, int);
245 static void update_chw(void *, int);
246 static void vap_update_wme(void *, int);
247 static void restart_vaps(void *, int);
248 static void ieee80211_newstate_cb(void *, int);
249
250 static int
251 null_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
252 const struct ieee80211_bpf_params *params)
253 {
254
255 ic_printf(ni->ni_ic, "missing ic_raw_xmit callback, drop frame\n");
256 m_freem(m);
257 return ENETDOWN;
258 }
259
260 void
261 ieee80211_proto_attach(struct ieee80211com *ic)
262 {
263 uint8_t hdrlen;
264
265 /* override the 802.3 setting */
266 hdrlen = ic->ic_headroom
267 + sizeof(struct ieee80211_qosframe_addr4)
268 + IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN
269 + IEEE80211_WEP_EXTIVLEN;
270 /* XXX no way to recalculate on ifdetach */
271 if (ALIGN(hdrlen) > max_linkhdr) {
272 /* XXX sanity check... */
273 max_linkhdr = ALIGN(hdrlen);
274 max_hdr = max_linkhdr + max_protohdr;
275 max_datalen = MHLEN - max_hdr;
276 }
277 ic->ic_protmode = IEEE80211_PROT_CTSONLY;
278
279 TASK_INIT(&ic->ic_parent_task, 0, parent_updown, ic);
280 TASK_INIT(&ic->ic_mcast_task, 0, update_mcast, ic);
281 TASK_INIT(&ic->ic_promisc_task, 0, update_promisc, ic);
282 TASK_INIT(&ic->ic_chan_task, 0, update_channel, ic);
283 TASK_INIT(&ic->ic_bmiss_task, 0, beacon_miss, ic);
284 TASK_INIT(&ic->ic_chw_task, 0, update_chw, ic);
285 TASK_INIT(&ic->ic_restart_task, 0, restart_vaps, ic);
286
287 ic->ic_wme.wme_hipri_switch_hysteresis =
288 AGGRESSIVE_MODE_SWITCH_HYSTERESIS;
289
290 /* initialize management frame handlers */
291 ic->ic_send_mgmt = ieee80211_send_mgmt;
292 ic->ic_raw_xmit = null_raw_xmit;
293
294 ieee80211_adhoc_attach(ic);
295 ieee80211_sta_attach(ic);
296 ieee80211_wds_attach(ic);
297 ieee80211_hostap_attach(ic);
298 #ifdef IEEE80211_SUPPORT_MESH
299 ieee80211_mesh_attach(ic);
300 #endif
301 ieee80211_monitor_attach(ic);
302 }
303
304 void
305 ieee80211_proto_detach(struct ieee80211com *ic)
306 {
307 ieee80211_monitor_detach(ic);
308 #ifdef IEEE80211_SUPPORT_MESH
309 ieee80211_mesh_detach(ic);
310 #endif
311 ieee80211_hostap_detach(ic);
312 ieee80211_wds_detach(ic);
313 ieee80211_adhoc_detach(ic);
314 ieee80211_sta_detach(ic);
315 }
316
317 static void
318 null_update_beacon(struct ieee80211vap *vap, int item)
319 {
320 }
321
322 void
323 ieee80211_proto_vattach(struct ieee80211vap *vap)
324 {
325 struct ieee80211com *ic = vap->iv_ic;
326 struct ifnet *ifp = vap->iv_ifp;
327 int i;
328
329 /* override the 802.3 setting */
330 ifp->if_hdrlen = ic->ic_headroom
331 + sizeof(struct ieee80211_qosframe_addr4)
332 + IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN
333 + IEEE80211_WEP_EXTIVLEN;
334
335 vap->iv_rtsthreshold = IEEE80211_RTS_DEFAULT;
336 vap->iv_fragthreshold = IEEE80211_FRAG_DEFAULT;
337 vap->iv_bmiss_max = IEEE80211_BMISS_MAX;
338 callout_init_mtx(&vap->iv_swbmiss, IEEE80211_LOCK_OBJ(ic), 0);
339 callout_init(&vap->iv_mgtsend, 1);
340 TASK_INIT(&vap->iv_nstate_task, 0, ieee80211_newstate_cb, vap);
341 TASK_INIT(&vap->iv_swbmiss_task, 0, beacon_swmiss, vap);
342 TASK_INIT(&vap->iv_wme_task, 0, vap_update_wme, vap);
343 /*
344 * Install default tx rate handling: no fixed rate, lowest
345 * supported rate for mgmt and multicast frames. Default
346 * max retry count. These settings can be changed by the
347 * driver and/or user applications.
348 */
349 for (i = IEEE80211_MODE_11A; i < IEEE80211_MODE_MAX; i++) {
350 const struct ieee80211_rateset *rs = &ic->ic_sup_rates[i];
351
352 vap->iv_txparms[i].ucastrate = IEEE80211_FIXED_RATE_NONE;
353
354 /*
355 * Setting the management rate to MCS 0 assumes that the
356 * BSS Basic rate set is empty and the BSS Basic MCS set
357 * is not.
358 *
359 * Since we're not checking this, default to the lowest
360 * defined rate for this mode.
361 *
362 * At least one 11n AP (DLINK DIR-825) is reported to drop
363 * some MCS management traffic (eg BA response frames.)
364 *
365 * See also: 9.6.0 of the 802.11n-2009 specification.
366 */
367 #ifdef NOTYET
368 if (i == IEEE80211_MODE_11NA || i == IEEE80211_MODE_11NG) {
369 vap->iv_txparms[i].mgmtrate = 0 | IEEE80211_RATE_MCS;
370 vap->iv_txparms[i].mcastrate = 0 | IEEE80211_RATE_MCS;
371 } else {
372 vap->iv_txparms[i].mgmtrate =
373 rs->rs_rates[0] & IEEE80211_RATE_VAL;
374 vap->iv_txparms[i].mcastrate =
375 rs->rs_rates[0] & IEEE80211_RATE_VAL;
376 }
377 #endif
378 vap->iv_txparms[i].mgmtrate = rs->rs_rates[0] & IEEE80211_RATE_VAL;
379 vap->iv_txparms[i].mcastrate = rs->rs_rates[0] & IEEE80211_RATE_VAL;
380 vap->iv_txparms[i].maxretry = IEEE80211_TXMAX_DEFAULT;
381 }
382 vap->iv_roaming = IEEE80211_ROAMING_AUTO;
383
384 vap->iv_update_beacon = null_update_beacon;
385 vap->iv_deliver_data = ieee80211_deliver_data;
386
387 /* attach support for operating mode */
388 ic->ic_vattach[vap->iv_opmode](vap);
389 }
390
391 void
392 ieee80211_proto_vdetach(struct ieee80211vap *vap)
393 {
394 #define FREEAPPIE(ie) do { \
395 if (ie != NULL) \
396 IEEE80211_FREE(ie, M_80211_NODE_IE); \
397 } while (0)
398 /*
399 * Detach operating mode module.
400 */
401 if (vap->iv_opdetach != NULL)
402 vap->iv_opdetach(vap);
403 /*
404 * This should not be needed as we detach when reseting
405 * the state but be conservative here since the
406 * authenticator may do things like spawn kernel threads.
407 */
408 if (vap->iv_auth->ia_detach != NULL)
409 vap->iv_auth->ia_detach(vap);
410 /*
411 * Detach any ACL'ator.
412 */
413 if (vap->iv_acl != NULL)
414 vap->iv_acl->iac_detach(vap);
415
416 FREEAPPIE(vap->iv_appie_beacon);
417 FREEAPPIE(vap->iv_appie_probereq);
418 FREEAPPIE(vap->iv_appie_proberesp);
419 FREEAPPIE(vap->iv_appie_assocreq);
420 FREEAPPIE(vap->iv_appie_assocresp);
421 FREEAPPIE(vap->iv_appie_wpa);
422 #undef FREEAPPIE
423 }
424
425 /*
426 * Simple-minded authenticator module support.
427 */
428
429 #define IEEE80211_AUTH_MAX (IEEE80211_AUTH_WPA+1)
430 /* XXX well-known names */
431 static const char *auth_modnames[IEEE80211_AUTH_MAX] = {
432 "wlan_internal", /* IEEE80211_AUTH_NONE */
433 "wlan_internal", /* IEEE80211_AUTH_OPEN */
434 "wlan_internal", /* IEEE80211_AUTH_SHARED */
435 "wlan_xauth", /* IEEE80211_AUTH_8021X */
436 "wlan_internal", /* IEEE80211_AUTH_AUTO */
437 "wlan_xauth", /* IEEE80211_AUTH_WPA */
438 };
439 static const struct ieee80211_authenticator *authenticators[IEEE80211_AUTH_MAX];
440
441 static const struct ieee80211_authenticator auth_internal = {
442 .ia_name = "wlan_internal",
443 .ia_attach = NULL,
444 .ia_detach = NULL,
445 .ia_node_join = NULL,
446 .ia_node_leave = NULL,
447 };
448
449 /*
450 * Setup internal authenticators once; they are never unregistered.
451 */
452 static void
453 ieee80211_auth_setup(void)
454 {
455 ieee80211_authenticator_register(IEEE80211_AUTH_OPEN, &auth_internal);
456 ieee80211_authenticator_register(IEEE80211_AUTH_SHARED, &auth_internal);
457 ieee80211_authenticator_register(IEEE80211_AUTH_AUTO, &auth_internal);
458 }
459 SYSINIT(wlan_auth, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_auth_setup, NULL);
460
461 const struct ieee80211_authenticator *
462 ieee80211_authenticator_get(int auth)
463 {
464 if (auth >= IEEE80211_AUTH_MAX)
465 return NULL;
466 if (authenticators[auth] == NULL)
467 ieee80211_load_module(auth_modnames[auth]);
468 return authenticators[auth];
469 }
470
471 void
472 ieee80211_authenticator_register(int type,
473 const struct ieee80211_authenticator *auth)
474 {
475 if (type >= IEEE80211_AUTH_MAX)
476 return;
477 authenticators[type] = auth;
478 }
479
480 void
481 ieee80211_authenticator_unregister(int type)
482 {
483
484 if (type >= IEEE80211_AUTH_MAX)
485 return;
486 authenticators[type] = NULL;
487 }
488
489 /*
490 * Very simple-minded ACL module support.
491 */
492 /* XXX just one for now */
493 static const struct ieee80211_aclator *acl = NULL;
494
495 void
496 ieee80211_aclator_register(const struct ieee80211_aclator *iac)
497 {
498 printf("wlan: %s acl policy registered\n", iac->iac_name);
499 acl = iac;
500 }
501
502 void
503 ieee80211_aclator_unregister(const struct ieee80211_aclator *iac)
504 {
505 if (acl == iac)
506 acl = NULL;
507 printf("wlan: %s acl policy unregistered\n", iac->iac_name);
508 }
509
510 const struct ieee80211_aclator *
511 ieee80211_aclator_get(const char *name)
512 {
513 if (acl == NULL)
514 ieee80211_load_module("wlan_acl");
515 return acl != NULL && strcmp(acl->iac_name, name) == 0 ? acl : NULL;
516 }
517
518 void
519 ieee80211_print_essid(const uint8_t *essid, int len)
520 {
521 const uint8_t *p;
522 int i;
523
524 if (len > IEEE80211_NWID_LEN)
525 len = IEEE80211_NWID_LEN;
526 /* determine printable or not */
527 for (i = 0, p = essid; i < len; i++, p++) {
528 if (*p < ' ' || *p > 0x7e)
529 break;
530 }
531 if (i == len) {
532 printf("\"");
533 for (i = 0, p = essid; i < len; i++, p++)
534 printf("%c", *p);
535 printf("\"");
536 } else {
537 printf("0x");
538 for (i = 0, p = essid; i < len; i++, p++)
539 printf("%02x", *p);
540 }
541 }
542
543 void
544 ieee80211_dump_pkt(struct ieee80211com *ic,
545 const uint8_t *buf, int len, int rate, int rssi)
546 {
547 const struct ieee80211_frame *wh;
548 int i;
549
550 wh = (const struct ieee80211_frame *)buf;
551 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) {
552 case IEEE80211_FC1_DIR_NODS:
553 printf("NODS %s", ether_sprintf(wh->i_addr2));
554 printf("->%s", ether_sprintf(wh->i_addr1));
555 printf("(%s)", ether_sprintf(wh->i_addr3));
556 break;
557 case IEEE80211_FC1_DIR_TODS:
558 printf("TODS %s", ether_sprintf(wh->i_addr2));
559 printf("->%s", ether_sprintf(wh->i_addr3));
560 printf("(%s)", ether_sprintf(wh->i_addr1));
561 break;
562 case IEEE80211_FC1_DIR_FROMDS:
563 printf("FRDS %s", ether_sprintf(wh->i_addr3));
564 printf("->%s", ether_sprintf(wh->i_addr1));
565 printf("(%s)", ether_sprintf(wh->i_addr2));
566 break;
567 case IEEE80211_FC1_DIR_DSTODS:
568 printf("DSDS %s", ether_sprintf((const uint8_t *)&wh[1]));
569 printf("->%s", ether_sprintf(wh->i_addr3));
570 printf("(%s", ether_sprintf(wh->i_addr2));
571 printf("->%s)", ether_sprintf(wh->i_addr1));
572 break;
573 }
574 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) {
575 case IEEE80211_FC0_TYPE_DATA:
576 printf(" data");
577 break;
578 case IEEE80211_FC0_TYPE_MGT:
579 printf(" %s", ieee80211_mgt_subtype_name(wh->i_fc[0]));
580 break;
581 default:
582 printf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK);
583 break;
584 }
585 if (IEEE80211_QOS_HAS_SEQ(wh)) {
586 const struct ieee80211_qosframe *qwh =
587 (const struct ieee80211_qosframe *)buf;
588 printf(" QoS [TID %u%s]", qwh->i_qos[0] & IEEE80211_QOS_TID,
589 qwh->i_qos[0] & IEEE80211_QOS_ACKPOLICY ? " ACM" : "");
590 }
591 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
592 int off;
593
594 off = ieee80211_anyhdrspace(ic, wh);
595 printf(" WEP [IV %.02x %.02x %.02x",
596 buf[off+0], buf[off+1], buf[off+2]);
597 if (buf[off+IEEE80211_WEP_IVLEN] & IEEE80211_WEP_EXTIV)
598 printf(" %.02x %.02x %.02x",
599 buf[off+4], buf[off+5], buf[off+6]);
600 printf(" KID %u]", buf[off+IEEE80211_WEP_IVLEN] >> 6);
601 }
602 if (rate >= 0)
603 printf(" %dM", rate / 2);
604 if (rssi >= 0)
605 printf(" +%d", rssi);
606 printf("\n");
607 if (len > 0) {
608 for (i = 0; i < len; i++) {
609 if ((i & 1) == 0)
610 printf(" ");
611 printf("%02x", buf[i]);
612 }
613 printf("\n");
614 }
615 }
616
617 static __inline int
618 findrix(const struct ieee80211_rateset *rs, int r)
619 {
620 int i;
621
622 for (i = 0; i < rs->rs_nrates; i++)
623 if ((rs->rs_rates[i] & IEEE80211_RATE_VAL) == r)
624 return i;
625 return -1;
626 }
627
628 int
629 ieee80211_fix_rate(struct ieee80211_node *ni,
630 struct ieee80211_rateset *nrs, int flags)
631 {
632 struct ieee80211vap *vap = ni->ni_vap;
633 struct ieee80211com *ic = ni->ni_ic;
634 int i, j, rix, error;
635 int okrate, badrate, fixedrate, ucastrate;
636 const struct ieee80211_rateset *srs;
637 uint8_t r;
638
639 error = 0;
640 okrate = badrate = 0;
641 ucastrate = vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)].ucastrate;
642 if (ucastrate != IEEE80211_FIXED_RATE_NONE) {
643 /*
644 * Workaround awkwardness with fixed rate. We are called
645 * to check both the legacy rate set and the HT rate set
646 * but we must apply any legacy fixed rate check only to the
647 * legacy rate set and vice versa. We cannot tell what type
648 * of rate set we've been given (legacy or HT) but we can
649 * distinguish the fixed rate type (MCS have 0x80 set).
650 * So to deal with this the caller communicates whether to
651 * check MCS or legacy rate using the flags and we use the
652 * type of any fixed rate to avoid applying an MCS to a
653 * legacy rate and vice versa.
654 */
655 if (ucastrate & 0x80) {
656 if (flags & IEEE80211_F_DOFRATE)
657 flags &= ~IEEE80211_F_DOFRATE;
658 } else if ((ucastrate & 0x80) == 0) {
659 if (flags & IEEE80211_F_DOFMCS)
660 flags &= ~IEEE80211_F_DOFMCS;
661 }
662 /* NB: required to make MCS match below work */
663 ucastrate &= IEEE80211_RATE_VAL;
664 }
665 fixedrate = IEEE80211_FIXED_RATE_NONE;
666 /*
667 * XXX we are called to process both MCS and legacy rates;
668 * we must use the appropriate basic rate set or chaos will
669 * ensue; for now callers that want MCS must supply
670 * IEEE80211_F_DOBRS; at some point we'll need to split this
671 * function so there are two variants, one for MCS and one
672 * for legacy rates.
673 */
674 if (flags & IEEE80211_F_DOBRS)
675 srs = (const struct ieee80211_rateset *)
676 ieee80211_get_suphtrates(ic, ni->ni_chan);
677 else
678 srs = ieee80211_get_suprates(ic, ni->ni_chan);
679 for (i = 0; i < nrs->rs_nrates; ) {
680 if (flags & IEEE80211_F_DOSORT) {
681 /*
682 * Sort rates.
683 */
684 for (j = i + 1; j < nrs->rs_nrates; j++) {
685 if (IEEE80211_RV(nrs->rs_rates[i]) >
686 IEEE80211_RV(nrs->rs_rates[j])) {
687 r = nrs->rs_rates[i];
688 nrs->rs_rates[i] = nrs->rs_rates[j];
689 nrs->rs_rates[j] = r;
690 }
691 }
692 }
693 r = nrs->rs_rates[i] & IEEE80211_RATE_VAL;
694 badrate = r;
695 /*
696 * Check for fixed rate.
697 */
698 if (r == ucastrate)
699 fixedrate = r;
700 /*
701 * Check against supported rates.
702 */
703 rix = findrix(srs, r);
704 if (flags & IEEE80211_F_DONEGO) {
705 if (rix < 0) {
706 /*
707 * A rate in the node's rate set is not
708 * supported. If this is a basic rate and we
709 * are operating as a STA then this is an error.
710 * Otherwise we just discard/ignore the rate.
711 */
712 if ((flags & IEEE80211_F_JOIN) &&
713 (nrs->rs_rates[i] & IEEE80211_RATE_BASIC))
714 error++;
715 } else if ((flags & IEEE80211_F_JOIN) == 0) {
716 /*
717 * Overwrite with the supported rate
718 * value so any basic rate bit is set.
719 */
720 nrs->rs_rates[i] = srs->rs_rates[rix];
721 }
722 }
723 if ((flags & IEEE80211_F_DODEL) && rix < 0) {
724 /*
725 * Delete unacceptable rates.
726 */
727 nrs->rs_nrates--;
728 for (j = i; j < nrs->rs_nrates; j++)
729 nrs->rs_rates[j] = nrs->rs_rates[j + 1];
730 nrs->rs_rates[j] = 0;
731 continue;
732 }
733 if (rix >= 0)
734 okrate = nrs->rs_rates[i];
735 i++;
736 }
737 if (okrate == 0 || error != 0 ||
738 ((flags & (IEEE80211_F_DOFRATE|IEEE80211_F_DOFMCS)) &&
739 fixedrate != ucastrate)) {
740 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni,
741 "%s: flags 0x%x okrate %d error %d fixedrate 0x%x "
742 "ucastrate %x\n", __func__, fixedrate, ucastrate, flags);
743 return badrate | IEEE80211_RATE_BASIC;
744 } else
745 return IEEE80211_RV(okrate);
746 }
747
748 /*
749 * Reset 11g-related state.
750 */
751 void
752 ieee80211_reset_erp(struct ieee80211com *ic)
753 {
754 ic->ic_flags &= ~IEEE80211_F_USEPROT;
755 ic->ic_nonerpsta = 0;
756 ic->ic_longslotsta = 0;
757 /*
758 * Short slot time is enabled only when operating in 11g
759 * and not in an IBSS. We must also honor whether or not
760 * the driver is capable of doing it.
761 */
762 ieee80211_set_shortslottime(ic,
763 IEEE80211_IS_CHAN_A(ic->ic_curchan) ||
764 IEEE80211_IS_CHAN_HT(ic->ic_curchan) ||
765 (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
766 ic->ic_opmode == IEEE80211_M_HOSTAP &&
767 (ic->ic_caps & IEEE80211_C_SHSLOT)));
768 /*
769 * Set short preamble and ERP barker-preamble flags.
770 */
771 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) ||
772 (ic->ic_caps & IEEE80211_C_SHPREAMBLE)) {
773 ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
774 ic->ic_flags &= ~IEEE80211_F_USEBARKER;
775 } else {
776 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
777 ic->ic_flags |= IEEE80211_F_USEBARKER;
778 }
779 }
780
781 /*
782 * Set the short slot time state and notify the driver.
783 */
784 void
785 ieee80211_set_shortslottime(struct ieee80211com *ic, int onoff)
786 {
787 if (onoff)
788 ic->ic_flags |= IEEE80211_F_SHSLOT;
789 else
790 ic->ic_flags &= ~IEEE80211_F_SHSLOT;
791 /* notify driver */
792 if (ic->ic_updateslot != NULL)
793 ic->ic_updateslot(ic);
794 }
795
796 /*
797 * Check if the specified rate set supports ERP.
798 * NB: the rate set is assumed to be sorted.
799 */
800 int
801 ieee80211_iserp_rateset(const struct ieee80211_rateset *rs)
802 {
803 static const int rates[] = { 2, 4, 11, 22, 12, 24, 48 };
804 int i, j;
805
806 if (rs->rs_nrates < nitems(rates))
807 return 0;
808 for (i = 0; i < nitems(rates); i++) {
809 for (j = 0; j < rs->rs_nrates; j++) {
810 int r = rs->rs_rates[j] & IEEE80211_RATE_VAL;
811 if (rates[i] == r)
812 goto next;
813 if (r > rates[i])
814 return 0;
815 }
816 return 0;
817 next:
818 ;
819 }
820 return 1;
821 }
822
823 /*
824 * Mark the basic rates for the rate table based on the
825 * operating mode. For real 11g we mark all the 11b rates
826 * and 6, 12, and 24 OFDM. For 11b compatibility we mark only
827 * 11b rates. There's also a pseudo 11a-mode used to mark only
828 * the basic OFDM rates.
829 */
830 static void
831 setbasicrates(struct ieee80211_rateset *rs,
832 enum ieee80211_phymode mode, int add)
833 {
834 static const struct ieee80211_rateset basic[IEEE80211_MODE_MAX] = {
835 [IEEE80211_MODE_11A] = { 3, { 12, 24, 48 } },
836 [IEEE80211_MODE_11B] = { 2, { 2, 4 } },
837 /* NB: mixed b/g */
838 [IEEE80211_MODE_11G] = { 4, { 2, 4, 11, 22 } },
839 [IEEE80211_MODE_TURBO_A] = { 3, { 12, 24, 48 } },
840 [IEEE80211_MODE_TURBO_G] = { 4, { 2, 4, 11, 22 } },
841 [IEEE80211_MODE_STURBO_A] = { 3, { 12, 24, 48 } },
842 [IEEE80211_MODE_HALF] = { 3, { 6, 12, 24 } },
843 [IEEE80211_MODE_QUARTER] = { 3, { 3, 6, 12 } },
844 [IEEE80211_MODE_11NA] = { 3, { 12, 24, 48 } },
845 /* NB: mixed b/g */
846 [IEEE80211_MODE_11NG] = { 4, { 2, 4, 11, 22 } },
847 /* NB: mixed b/g */
848 [IEEE80211_MODE_VHT_2GHZ] = { 4, { 2, 4, 11, 22 } },
849 [IEEE80211_MODE_VHT_5GHZ] = { 3, { 12, 24, 48 } },
850 };
851 int i, j;
852
853 for (i = 0; i < rs->rs_nrates; i++) {
854 if (!add)
855 rs->rs_rates[i] &= IEEE80211_RATE_VAL;
856 for (j = 0; j < basic[mode].rs_nrates; j++)
857 if (basic[mode].rs_rates[j] == rs->rs_rates[i]) {
858 rs->rs_rates[i] |= IEEE80211_RATE_BASIC;
859 break;
860 }
861 }
862 }
863
864 /*
865 * Set the basic rates in a rate set.
866 */
867 void
868 ieee80211_setbasicrates(struct ieee80211_rateset *rs,
869 enum ieee80211_phymode mode)
870 {
871 setbasicrates(rs, mode, 0);
872 }
873
874 /*
875 * Add basic rates to a rate set.
876 */
877 void
878 ieee80211_addbasicrates(struct ieee80211_rateset *rs,
879 enum ieee80211_phymode mode)
880 {
881 setbasicrates(rs, mode, 1);
882 }
883
884 /*
885 * WME protocol support.
886 *
887 * The default 11a/b/g/n parameters come from the WiFi Alliance WMM
888 * System Interopability Test Plan (v1.4, Appendix F) and the 802.11n
889 * Draft 2.0 Test Plan (Appendix D).
890 *
891 * Static/Dynamic Turbo mode settings come from Atheros.
892 */
893 typedef struct phyParamType {
894 uint8_t aifsn;
895 uint8_t logcwmin;
896 uint8_t logcwmax;
897 uint16_t txopLimit;
898 uint8_t acm;
899 } paramType;
900
901 static const struct phyParamType phyParamForAC_BE[IEEE80211_MODE_MAX] = {
902 [IEEE80211_MODE_AUTO] = { 3, 4, 6, 0, 0 },
903 [IEEE80211_MODE_11A] = { 3, 4, 6, 0, 0 },
904 [IEEE80211_MODE_11B] = { 3, 4, 6, 0, 0 },
905 [IEEE80211_MODE_11G] = { 3, 4, 6, 0, 0 },
906 [IEEE80211_MODE_FH] = { 3, 4, 6, 0, 0 },
907 [IEEE80211_MODE_TURBO_A]= { 2, 3, 5, 0, 0 },
908 [IEEE80211_MODE_TURBO_G]= { 2, 3, 5, 0, 0 },
909 [IEEE80211_MODE_STURBO_A]={ 2, 3, 5, 0, 0 },
910 [IEEE80211_MODE_HALF] = { 3, 4, 6, 0, 0 },
911 [IEEE80211_MODE_QUARTER]= { 3, 4, 6, 0, 0 },
912 [IEEE80211_MODE_11NA] = { 3, 4, 6, 0, 0 },
913 [IEEE80211_MODE_11NG] = { 3, 4, 6, 0, 0 },
914 [IEEE80211_MODE_VHT_2GHZ] = { 3, 4, 6, 0, 0 },
915 [IEEE80211_MODE_VHT_5GHZ] = { 3, 4, 6, 0, 0 },
916 };
917 static const struct phyParamType phyParamForAC_BK[IEEE80211_MODE_MAX] = {
918 [IEEE80211_MODE_AUTO] = { 7, 4, 10, 0, 0 },
919 [IEEE80211_MODE_11A] = { 7, 4, 10, 0, 0 },
920 [IEEE80211_MODE_11B] = { 7, 4, 10, 0, 0 },
921 [IEEE80211_MODE_11G] = { 7, 4, 10, 0, 0 },
922 [IEEE80211_MODE_FH] = { 7, 4, 10, 0, 0 },
923 [IEEE80211_MODE_TURBO_A]= { 7, 3, 10, 0, 0 },
924 [IEEE80211_MODE_TURBO_G]= { 7, 3, 10, 0, 0 },
925 [IEEE80211_MODE_STURBO_A]={ 7, 3, 10, 0, 0 },
926 [IEEE80211_MODE_HALF] = { 7, 4, 10, 0, 0 },
927 [IEEE80211_MODE_QUARTER]= { 7, 4, 10, 0, 0 },
928 [IEEE80211_MODE_11NA] = { 7, 4, 10, 0, 0 },
929 [IEEE80211_MODE_11NG] = { 7, 4, 10, 0, 0 },
930 [IEEE80211_MODE_VHT_2GHZ] = { 7, 4, 10, 0, 0 },
931 [IEEE80211_MODE_VHT_5GHZ] = { 7, 4, 10, 0, 0 },
932 };
933 static const struct phyParamType phyParamForAC_VI[IEEE80211_MODE_MAX] = {
934 [IEEE80211_MODE_AUTO] = { 1, 3, 4, 94, 0 },
935 [IEEE80211_MODE_11A] = { 1, 3, 4, 94, 0 },
936 [IEEE80211_MODE_11B] = { 1, 3, 4, 188, 0 },
937 [IEEE80211_MODE_11G] = { 1, 3, 4, 94, 0 },
938 [IEEE80211_MODE_FH] = { 1, 3, 4, 188, 0 },
939 [IEEE80211_MODE_TURBO_A]= { 1, 2, 3, 94, 0 },
940 [IEEE80211_MODE_TURBO_G]= { 1, 2, 3, 94, 0 },
941 [IEEE80211_MODE_STURBO_A]={ 1, 2, 3, 94, 0 },
942 [IEEE80211_MODE_HALF] = { 1, 3, 4, 94, 0 },
943 [IEEE80211_MODE_QUARTER]= { 1, 3, 4, 94, 0 },
944 [IEEE80211_MODE_11NA] = { 1, 3, 4, 94, 0 },
945 [IEEE80211_MODE_11NG] = { 1, 3, 4, 94, 0 },
946 [IEEE80211_MODE_VHT_2GHZ] = { 1, 3, 4, 94, 0 },
947 [IEEE80211_MODE_VHT_5GHZ] = { 1, 3, 4, 94, 0 },
948 };
949 static const struct phyParamType phyParamForAC_VO[IEEE80211_MODE_MAX] = {
950 [IEEE80211_MODE_AUTO] = { 1, 2, 3, 47, 0 },
951 [IEEE80211_MODE_11A] = { 1, 2, 3, 47, 0 },
952 [IEEE80211_MODE_11B] = { 1, 2, 3, 102, 0 },
953 [IEEE80211_MODE_11G] = { 1, 2, 3, 47, 0 },
954 [IEEE80211_MODE_FH] = { 1, 2, 3, 102, 0 },
955 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 },
956 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 },
957 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 },
958 [IEEE80211_MODE_HALF] = { 1, 2, 3, 47, 0 },
959 [IEEE80211_MODE_QUARTER]= { 1, 2, 3, 47, 0 },
960 [IEEE80211_MODE_11NA] = { 1, 2, 3, 47, 0 },
961 [IEEE80211_MODE_11NG] = { 1, 2, 3, 47, 0 },
962 [IEEE80211_MODE_VHT_2GHZ] = { 1, 2, 3, 47, 0 },
963 [IEEE80211_MODE_VHT_5GHZ] = { 1, 2, 3, 47, 0 },
964 };
965
966 static const struct phyParamType bssPhyParamForAC_BE[IEEE80211_MODE_MAX] = {
967 [IEEE80211_MODE_AUTO] = { 3, 4, 10, 0, 0 },
968 [IEEE80211_MODE_11A] = { 3, 4, 10, 0, 0 },
969 [IEEE80211_MODE_11B] = { 3, 4, 10, 0, 0 },
970 [IEEE80211_MODE_11G] = { 3, 4, 10, 0, 0 },
971 [IEEE80211_MODE_FH] = { 3, 4, 10, 0, 0 },
972 [IEEE80211_MODE_TURBO_A]= { 2, 3, 10, 0, 0 },
973 [IEEE80211_MODE_TURBO_G]= { 2, 3, 10, 0, 0 },
974 [IEEE80211_MODE_STURBO_A]={ 2, 3, 10, 0, 0 },
975 [IEEE80211_MODE_HALF] = { 3, 4, 10, 0, 0 },
976 [IEEE80211_MODE_QUARTER]= { 3, 4, 10, 0, 0 },
977 [IEEE80211_MODE_11NA] = { 3, 4, 10, 0, 0 },
978 [IEEE80211_MODE_11NG] = { 3, 4, 10, 0, 0 },
979 };
980 static const struct phyParamType bssPhyParamForAC_VI[IEEE80211_MODE_MAX] = {
981 [IEEE80211_MODE_AUTO] = { 2, 3, 4, 94, 0 },
982 [IEEE80211_MODE_11A] = { 2, 3, 4, 94, 0 },
983 [IEEE80211_MODE_11B] = { 2, 3, 4, 188, 0 },
984 [IEEE80211_MODE_11G] = { 2, 3, 4, 94, 0 },
985 [IEEE80211_MODE_FH] = { 2, 3, 4, 188, 0 },
986 [IEEE80211_MODE_TURBO_A]= { 2, 2, 3, 94, 0 },
987 [IEEE80211_MODE_TURBO_G]= { 2, 2, 3, 94, 0 },
988 [IEEE80211_MODE_STURBO_A]={ 2, 2, 3, 94, 0 },
989 [IEEE80211_MODE_HALF] = { 2, 3, 4, 94, 0 },
990 [IEEE80211_MODE_QUARTER]= { 2, 3, 4, 94, 0 },
991 [IEEE80211_MODE_11NA] = { 2, 3, 4, 94, 0 },
992 [IEEE80211_MODE_11NG] = { 2, 3, 4, 94, 0 },
993 };
994 static const struct phyParamType bssPhyParamForAC_VO[IEEE80211_MODE_MAX] = {
995 [IEEE80211_MODE_AUTO] = { 2, 2, 3, 47, 0 },
996 [IEEE80211_MODE_11A] = { 2, 2, 3, 47, 0 },
997 [IEEE80211_MODE_11B] = { 2, 2, 3, 102, 0 },
998 [IEEE80211_MODE_11G] = { 2, 2, 3, 47, 0 },
999 [IEEE80211_MODE_FH] = { 2, 2, 3, 102, 0 },
1000 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 },
1001 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 },
1002 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 },
1003 [IEEE80211_MODE_HALF] = { 2, 2, 3, 47, 0 },
1004 [IEEE80211_MODE_QUARTER]= { 2, 2, 3, 47, 0 },
1005 [IEEE80211_MODE_11NA] = { 2, 2, 3, 47, 0 },
1006 [IEEE80211_MODE_11NG] = { 2, 2, 3, 47, 0 },
1007 };
1008
1009 static void
1010 _setifsparams(struct wmeParams *wmep, const paramType *phy)
1011 {
1012 wmep->wmep_aifsn = phy->aifsn;
1013 wmep->wmep_logcwmin = phy->logcwmin;
1014 wmep->wmep_logcwmax = phy->logcwmax;
1015 wmep->wmep_txopLimit = phy->txopLimit;
1016 }
1017
1018 static void
1019 setwmeparams(struct ieee80211vap *vap, const char *type, int ac,
1020 struct wmeParams *wmep, const paramType *phy)
1021 {
1022 wmep->wmep_acm = phy->acm;
1023 _setifsparams(wmep, phy);
1024
1025 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1026 "set %s (%s) [acm %u aifsn %u logcwmin %u logcwmax %u txop %u]\n",
1027 ieee80211_wme_acnames[ac], type,
1028 wmep->wmep_acm, wmep->wmep_aifsn, wmep->wmep_logcwmin,
1029 wmep->wmep_logcwmax, wmep->wmep_txopLimit);
1030 }
1031
1032 static void
1033 ieee80211_wme_initparams_locked(struct ieee80211vap *vap)
1034 {
1035 struct ieee80211com *ic = vap->iv_ic;
1036 struct ieee80211_wme_state *wme = &ic->ic_wme;
1037 const paramType *pPhyParam, *pBssPhyParam;
1038 struct wmeParams *wmep;
1039 enum ieee80211_phymode mode;
1040 int i;
1041
1042 IEEE80211_LOCK_ASSERT(ic);
1043
1044 if ((ic->ic_caps & IEEE80211_C_WME) == 0 || ic->ic_nrunning > 1)
1045 return;
1046
1047 /*
1048 * Clear the wme cap_info field so a qoscount from a previous
1049 * vap doesn't confuse later code which only parses the beacon
1050 * field and updates hardware when said field changes.
1051 * Otherwise the hardware is programmed with defaults, not what
1052 * the beacon actually announces.
1053 */
1054 wme->wme_wmeChanParams.cap_info = 0;
1055
1056 /*
1057 * Select mode; we can be called early in which case we
1058 * always use auto mode. We know we'll be called when
1059 * entering the RUN state with bsschan setup properly
1060 * so state will eventually get set correctly
1061 */
1062 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC)
1063 mode = ieee80211_chan2mode(ic->ic_bsschan);
1064 else
1065 mode = IEEE80211_MODE_AUTO;
1066 for (i = 0; i < WME_NUM_AC; i++) {
1067 switch (i) {
1068 case WME_AC_BK:
1069 pPhyParam = &phyParamForAC_BK[mode];
1070 pBssPhyParam = &phyParamForAC_BK[mode];
1071 break;
1072 case WME_AC_VI:
1073 pPhyParam = &phyParamForAC_VI[mode];
1074 pBssPhyParam = &bssPhyParamForAC_VI[mode];
1075 break;
1076 case WME_AC_VO:
1077 pPhyParam = &phyParamForAC_VO[mode];
1078 pBssPhyParam = &bssPhyParamForAC_VO[mode];
1079 break;
1080 case WME_AC_BE:
1081 default:
1082 pPhyParam = &phyParamForAC_BE[mode];
1083 pBssPhyParam = &bssPhyParamForAC_BE[mode];
1084 break;
1085 }
1086 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i];
1087 if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
1088 setwmeparams(vap, "chan", i, wmep, pPhyParam);
1089 } else {
1090 setwmeparams(vap, "chan", i, wmep, pBssPhyParam);
1091 }
1092 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i];
1093 setwmeparams(vap, "bss ", i, wmep, pBssPhyParam);
1094 }
1095 /* NB: check ic_bss to avoid NULL deref on initial attach */
1096 if (vap->iv_bss != NULL) {
1097 /*
1098 * Calculate aggressive mode switching threshold based
1099 * on beacon interval. This doesn't need locking since
1100 * we're only called before entering the RUN state at
1101 * which point we start sending beacon frames.
1102 */
1103 wme->wme_hipri_switch_thresh =
1104 (HIGH_PRI_SWITCH_THRESH * vap->iv_bss->ni_intval) / 100;
1105 wme->wme_flags &= ~WME_F_AGGRMODE;
1106 ieee80211_wme_updateparams(vap);
1107 }
1108 }
1109
1110 void
1111 ieee80211_wme_initparams(struct ieee80211vap *vap)
1112 {
1113 struct ieee80211com *ic = vap->iv_ic;
1114
1115 IEEE80211_LOCK(ic);
1116 ieee80211_wme_initparams_locked(vap);
1117 IEEE80211_UNLOCK(ic);
1118 }
1119
1120 /*
1121 * Update WME parameters for ourself and the BSS.
1122 */
1123 void
1124 ieee80211_wme_updateparams_locked(struct ieee80211vap *vap)
1125 {
1126 static const paramType aggrParam[IEEE80211_MODE_MAX] = {
1127 [IEEE80211_MODE_AUTO] = { 2, 4, 10, 64, 0 },
1128 [IEEE80211_MODE_11A] = { 2, 4, 10, 64, 0 },
1129 [IEEE80211_MODE_11B] = { 2, 5, 10, 64, 0 },
1130 [IEEE80211_MODE_11G] = { 2, 4, 10, 64, 0 },
1131 [IEEE80211_MODE_FH] = { 2, 5, 10, 64, 0 },
1132 [IEEE80211_MODE_TURBO_A] = { 1, 3, 10, 64, 0 },
1133 [IEEE80211_MODE_TURBO_G] = { 1, 3, 10, 64, 0 },
1134 [IEEE80211_MODE_STURBO_A] = { 1, 3, 10, 64, 0 },
1135 [IEEE80211_MODE_HALF] = { 2, 4, 10, 64, 0 },
1136 [IEEE80211_MODE_QUARTER] = { 2, 4, 10, 64, 0 },
1137 [IEEE80211_MODE_11NA] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/
1138 [IEEE80211_MODE_11NG] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/
1139 [IEEE80211_MODE_VHT_2GHZ] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/
1140 [IEEE80211_MODE_VHT_5GHZ] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/
1141 };
1142 struct ieee80211com *ic = vap->iv_ic;
1143 struct ieee80211_wme_state *wme = &ic->ic_wme;
1144 const struct wmeParams *wmep;
1145 struct wmeParams *chanp, *bssp;
1146 enum ieee80211_phymode mode;
1147 int i;
1148 int do_aggrmode = 0;
1149
1150 /*
1151 * Set up the channel access parameters for the physical
1152 * device. First populate the configured settings.
1153 */
1154 for (i = 0; i < WME_NUM_AC; i++) {
1155 chanp = &wme->wme_chanParams.cap_wmeParams[i];
1156 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i];
1157 chanp->wmep_aifsn = wmep->wmep_aifsn;
1158 chanp->wmep_logcwmin = wmep->wmep_logcwmin;
1159 chanp->wmep_logcwmax = wmep->wmep_logcwmax;
1160 chanp->wmep_txopLimit = wmep->wmep_txopLimit;
1161
1162 chanp = &wme->wme_bssChanParams.cap_wmeParams[i];
1163 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i];
1164 chanp->wmep_aifsn = wmep->wmep_aifsn;
1165 chanp->wmep_logcwmin = wmep->wmep_logcwmin;
1166 chanp->wmep_logcwmax = wmep->wmep_logcwmax;
1167 chanp->wmep_txopLimit = wmep->wmep_txopLimit;
1168 }
1169
1170 /*
1171 * Select mode; we can be called early in which case we
1172 * always use auto mode. We know we'll be called when
1173 * entering the RUN state with bsschan setup properly
1174 * so state will eventually get set correctly
1175 */
1176 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC)
1177 mode = ieee80211_chan2mode(ic->ic_bsschan);
1178 else
1179 mode = IEEE80211_MODE_AUTO;
1180
1181 /*
1182 * This implements aggressive mode as found in certain
1183 * vendors' AP's. When there is significant high
1184 * priority (VI/VO) traffic in the BSS throttle back BE
1185 * traffic by using conservative parameters. Otherwise
1186 * BE uses aggressive params to optimize performance of
1187 * legacy/non-QoS traffic.
1188 */
1189
1190 /* Hostap? Only if aggressive mode is enabled */
1191 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
1192 (wme->wme_flags & WME_F_AGGRMODE) != 0)
1193 do_aggrmode = 1;
1194
1195 /*
1196 * Station? Only if we're in a non-QoS BSS.
1197 */
1198 else if ((vap->iv_opmode == IEEE80211_M_STA &&
1199 (vap->iv_bss->ni_flags & IEEE80211_NODE_QOS) == 0))
1200 do_aggrmode = 1;
1201
1202 /*
1203 * IBSS? Only if we we have WME enabled.
1204 */
1205 else if ((vap->iv_opmode == IEEE80211_M_IBSS) &&
1206 (vap->iv_flags & IEEE80211_F_WME))
1207 do_aggrmode = 1;
1208
1209 /*
1210 * If WME is disabled on this VAP, default to aggressive mode
1211 * regardless of the configuration.
1212 */
1213 if ((vap->iv_flags & IEEE80211_F_WME) == 0)
1214 do_aggrmode = 1;
1215
1216 /* XXX WDS? */
1217
1218 /* XXX MBSS? */
1219
1220 if (do_aggrmode) {
1221 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE];
1222 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE];
1223
1224 chanp->wmep_aifsn = bssp->wmep_aifsn = aggrParam[mode].aifsn;
1225 chanp->wmep_logcwmin = bssp->wmep_logcwmin =
1226 aggrParam[mode].logcwmin;
1227 chanp->wmep_logcwmax = bssp->wmep_logcwmax =
1228 aggrParam[mode].logcwmax;
1229 chanp->wmep_txopLimit = bssp->wmep_txopLimit =
1230 (vap->iv_flags & IEEE80211_F_BURST) ?
1231 aggrParam[mode].txopLimit : 0;
1232 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1233 "update %s (chan+bss) [acm %u aifsn %u logcwmin %u "
1234 "logcwmax %u txop %u]\n", ieee80211_wme_acnames[WME_AC_BE],
1235 chanp->wmep_acm, chanp->wmep_aifsn, chanp->wmep_logcwmin,
1236 chanp->wmep_logcwmax, chanp->wmep_txopLimit);
1237 }
1238
1239
1240 /*
1241 * Change the contention window based on the number of associated
1242 * stations. If the number of associated stations is 1 and
1243 * aggressive mode is enabled, lower the contention window even
1244 * further.
1245 */
1246 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
1247 ic->ic_sta_assoc < 2 && (wme->wme_flags & WME_F_AGGRMODE) != 0) {
1248 static const uint8_t logCwMin[IEEE80211_MODE_MAX] = {
1249 [IEEE80211_MODE_AUTO] = 3,
1250 [IEEE80211_MODE_11A] = 3,
1251 [IEEE80211_MODE_11B] = 4,
1252 [IEEE80211_MODE_11G] = 3,
1253 [IEEE80211_MODE_FH] = 4,
1254 [IEEE80211_MODE_TURBO_A] = 3,
1255 [IEEE80211_MODE_TURBO_G] = 3,
1256 [IEEE80211_MODE_STURBO_A] = 3,
1257 [IEEE80211_MODE_HALF] = 3,
1258 [IEEE80211_MODE_QUARTER] = 3,
1259 [IEEE80211_MODE_11NA] = 3,
1260 [IEEE80211_MODE_11NG] = 3,
1261 [IEEE80211_MODE_VHT_2GHZ] = 3,
1262 [IEEE80211_MODE_VHT_5GHZ] = 3,
1263 };
1264 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE];
1265 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE];
1266
1267 chanp->wmep_logcwmin = bssp->wmep_logcwmin = logCwMin[mode];
1268 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1269 "update %s (chan+bss) logcwmin %u\n",
1270 ieee80211_wme_acnames[WME_AC_BE], chanp->wmep_logcwmin);
1271 }
1272
1273 /*
1274 * Arrange for the beacon update.
1275 *
1276 * XXX what about MBSS, WDS?
1277 */
1278 if (vap->iv_opmode == IEEE80211_M_HOSTAP
1279 || vap->iv_opmode == IEEE80211_M_IBSS) {
1280 /*
1281 * Arrange for a beacon update and bump the parameter
1282 * set number so associated stations load the new values.
1283 */
1284 wme->wme_bssChanParams.cap_info =
1285 (wme->wme_bssChanParams.cap_info+1) & WME_QOSINFO_COUNT;
1286 ieee80211_beacon_notify(vap, IEEE80211_BEACON_WME);
1287 }
1288
1289 /* schedule the deferred WME update */
1290 ieee80211_runtask(ic, &vap->iv_wme_task);
1291
1292 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1293 "%s: WME params updated, cap_info 0x%x\n", __func__,
1294 vap->iv_opmode == IEEE80211_M_STA ?
1295 wme->wme_wmeChanParams.cap_info :
1296 wme->wme_bssChanParams.cap_info);
1297 }
1298
1299 void
1300 ieee80211_wme_updateparams(struct ieee80211vap *vap)
1301 {
1302 struct ieee80211com *ic = vap->iv_ic;
1303
1304 if (ic->ic_caps & IEEE80211_C_WME) {
1305 IEEE80211_LOCK(ic);
1306 ieee80211_wme_updateparams_locked(vap);
1307 IEEE80211_UNLOCK(ic);
1308 }
1309 }
1310
1311 /*
1312 * Fetch the WME parameters for the given VAP.
1313 *
1314 * When net80211 grows p2p, etc support, this may return different
1315 * parameters for each VAP.
1316 */
1317 void
1318 ieee80211_wme_vap_getparams(struct ieee80211vap *vap, struct chanAccParams *wp)
1319 {
1320
1321 memcpy(wp, &vap->iv_ic->ic_wme.wme_chanParams, sizeof(*wp));
1322 }
1323
1324 /*
1325 * For NICs which only support one set of WME paramaters (ie, softmac NICs)
1326 * there may be different VAP WME parameters but only one is "active".
1327 * This returns the "NIC" WME parameters for the currently active
1328 * context.
1329 */
1330 void
1331 ieee80211_wme_ic_getparams(struct ieee80211com *ic, struct chanAccParams *wp)
1332 {
1333
1334 memcpy(wp, &ic->ic_wme.wme_chanParams, sizeof(*wp));
1335 }
1336
1337 /*
1338 * Return whether to use QoS on a given WME queue.
1339 *
1340 * This is intended to be called from the transmit path of softmac drivers
1341 * which are setting NoAck bits in transmit descriptors.
1342 *
1343 * Ideally this would be set in some transmit field before the packet is
1344 * queued to the driver but net80211 isn't quite there yet.
1345 */
1346 int
1347 ieee80211_wme_vap_ac_is_noack(struct ieee80211vap *vap, int ac)
1348 {
1349 /* Bounds/sanity check */
1350 if (ac < 0 || ac >= WME_NUM_AC)
1351 return (0);
1352
1353 /* Again, there's only one global context for now */
1354 return (!! vap->iv_ic->ic_wme.wme_chanParams.cap_wmeParams[ac].wmep_noackPolicy);
1355 }
1356
1357 static void
1358 parent_updown(void *arg, int npending)
1359 {
1360 struct ieee80211com *ic = arg;
1361
1362 ic->ic_parent(ic);
1363 }
1364
1365 static void
1366 update_mcast(void *arg, int npending)
1367 {
1368 struct ieee80211com *ic = arg;
1369
1370 ic->ic_update_mcast(ic);
1371 }
1372
1373 static void
1374 update_promisc(void *arg, int npending)
1375 {
1376 struct ieee80211com *ic = arg;
1377
1378 ic->ic_update_promisc(ic);
1379 }
1380
1381 static void
1382 update_channel(void *arg, int npending)
1383 {
1384 struct ieee80211com *ic = arg;
1385
1386 ic->ic_set_channel(ic);
1387 ieee80211_radiotap_chan_change(ic);
1388 }
1389
1390 static void
1391 update_chw(void *arg, int npending)
1392 {
1393 struct ieee80211com *ic = arg;
1394
1395 /*
1396 * XXX should we defer the channel width _config_ update until now?
1397 */
1398 ic->ic_update_chw(ic);
1399 }
1400
1401 /*
1402 * Deferred WME update.
1403 *
1404 * In preparation for per-VAP WME configuration, call the VAP
1405 * method if the VAP requires it. Otherwise, just call the
1406 * older global method. There isn't a per-VAP WME configuration
1407 * just yet so for now just use the global configuration.
1408 */
1409 static void
1410 vap_update_wme(void *arg, int npending)
1411 {
1412 struct ieee80211vap *vap = arg;
1413 struct ieee80211com *ic = vap->iv_ic;
1414
1415 if (vap->iv_wme_update != NULL)
1416 vap->iv_wme_update(vap,
1417 ic->ic_wme.wme_chanParams.cap_wmeParams);
1418 else
1419 ic->ic_wme.wme_update(ic);
1420 }
1421
1422 static void
1423 restart_vaps(void *arg, int npending)
1424 {
1425 struct ieee80211com *ic = arg;
1426
1427 ieee80211_suspend_all(ic);
1428 ieee80211_resume_all(ic);
1429 }
1430
1431 /*
1432 * Block until the parent is in a known state. This is
1433 * used after any operations that dispatch a task (e.g.
1434 * to auto-configure the parent device up/down).
1435 */
1436 void
1437 ieee80211_waitfor_parent(struct ieee80211com *ic)
1438 {
1439 taskqueue_block(ic->ic_tq);
1440 ieee80211_draintask(ic, &ic->ic_parent_task);
1441 ieee80211_draintask(ic, &ic->ic_mcast_task);
1442 ieee80211_draintask(ic, &ic->ic_promisc_task);
1443 ieee80211_draintask(ic, &ic->ic_chan_task);
1444 ieee80211_draintask(ic, &ic->ic_bmiss_task);
1445 ieee80211_draintask(ic, &ic->ic_chw_task);
1446 taskqueue_unblock(ic->ic_tq);
1447 }
1448
1449 /*
1450 * Check to see whether the current channel needs reset.
1451 *
1452 * Some devices don't handle being given an invalid channel
1453 * in their operating mode very well (eg wpi(4) will throw a
1454 * firmware exception.)
1455 *
1456 * Return 0 if we're ok, 1 if the channel needs to be reset.
1457 *
1458 * See PR kern/202502.
1459 */
1460 static int
1461 ieee80211_start_check_reset_chan(struct ieee80211vap *vap)
1462 {
1463 struct ieee80211com *ic = vap->iv_ic;
1464
1465 if ((vap->iv_opmode == IEEE80211_M_IBSS &&
1466 IEEE80211_IS_CHAN_NOADHOC(ic->ic_curchan)) ||
1467 (vap->iv_opmode == IEEE80211_M_HOSTAP &&
1468 IEEE80211_IS_CHAN_NOHOSTAP(ic->ic_curchan)))
1469 return (1);
1470 return (0);
1471 }
1472
1473 /*
1474 * Reset the curchan to a known good state.
1475 */
1476 static void
1477 ieee80211_start_reset_chan(struct ieee80211vap *vap)
1478 {
1479 struct ieee80211com *ic = vap->iv_ic;
1480
1481 ic->ic_curchan = &ic->ic_channels[0];
1482 }
1483
1484 /*
1485 * Start a vap running. If this is the first vap to be
1486 * set running on the underlying device then we
1487 * automatically bring the device up.
1488 */
1489 void
1490 ieee80211_start_locked(struct ieee80211vap *vap)
1491 {
1492 struct ifnet *ifp = vap->iv_ifp;
1493 struct ieee80211com *ic = vap->iv_ic;
1494
1495 IEEE80211_LOCK_ASSERT(ic);
1496
1497 IEEE80211_DPRINTF(vap,
1498 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1499 "start running, %d vaps running\n", ic->ic_nrunning);
1500
1501 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
1502 /*
1503 * Mark us running. Note that it's ok to do this first;
1504 * if we need to bring the parent device up we defer that
1505 * to avoid dropping the com lock. We expect the device
1506 * to respond to being marked up by calling back into us
1507 * through ieee80211_start_all at which point we'll come
1508 * back in here and complete the work.
1509 */
1510 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1511 /*
1512 * We are not running; if this we are the first vap
1513 * to be brought up auto-up the parent if necessary.
1514 */
1515 if (ic->ic_nrunning++ == 0) {
1516
1517 /* reset the channel to a known good channel */
1518 if (ieee80211_start_check_reset_chan(vap))
1519 ieee80211_start_reset_chan(vap);
1520
1521 IEEE80211_DPRINTF(vap,
1522 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1523 "%s: up parent %s\n", __func__, ic->ic_name);
1524 ieee80211_runtask(ic, &ic->ic_parent_task);
1525 return;
1526 }
1527 }
1528 /*
1529 * If the parent is up and running, then kick the
1530 * 802.11 state machine as appropriate.
1531 */
1532 if (vap->iv_roaming != IEEE80211_ROAMING_MANUAL) {
1533 if (vap->iv_opmode == IEEE80211_M_STA) {
1534 #if 0
1535 /* XXX bypasses scan too easily; disable for now */
1536 /*
1537 * Try to be intelligent about clocking the state
1538 * machine. If we're currently in RUN state then
1539 * we should be able to apply any new state/parameters
1540 * simply by re-associating. Otherwise we need to
1541 * re-scan to select an appropriate ap.
1542 */
1543 if (vap->iv_state >= IEEE80211_S_RUN)
1544 ieee80211_new_state_locked(vap,
1545 IEEE80211_S_ASSOC, 1);
1546 else
1547 #endif
1548 ieee80211_new_state_locked(vap,
1549 IEEE80211_S_SCAN, 0);
1550 } else {
1551 /*
1552 * For monitor+wds mode there's nothing to do but
1553 * start running. Otherwise if this is the first
1554 * vap to be brought up, start a scan which may be
1555 * preempted if the station is locked to a particular
1556 * channel.
1557 */
1558 vap->iv_flags_ext |= IEEE80211_FEXT_REINIT;
1559 if (vap->iv_opmode == IEEE80211_M_MONITOR ||
1560 vap->iv_opmode == IEEE80211_M_WDS)
1561 ieee80211_new_state_locked(vap,
1562 IEEE80211_S_RUN, -1);
1563 else
1564 ieee80211_new_state_locked(vap,
1565 IEEE80211_S_SCAN, 0);
1566 }
1567 }
1568 }
1569
1570 /*
1571 * Start a single vap.
1572 */
1573 void
1574 ieee80211_init(void *arg)
1575 {
1576 struct ieee80211vap *vap = arg;
1577
1578 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1579 "%s\n", __func__);
1580
1581 IEEE80211_LOCK(vap->iv_ic);
1582 ieee80211_start_locked(vap);
1583 IEEE80211_UNLOCK(vap->iv_ic);
1584 }
1585
1586 /*
1587 * Start all runnable vap's on a device.
1588 */
1589 void
1590 ieee80211_start_all(struct ieee80211com *ic)
1591 {
1592 struct ieee80211vap *vap;
1593
1594 IEEE80211_LOCK(ic);
1595 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1596 struct ifnet *ifp = vap->iv_ifp;
1597 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */
1598 ieee80211_start_locked(vap);
1599 }
1600 IEEE80211_UNLOCK(ic);
1601 }
1602
1603 /*
1604 * Stop a vap. We force it down using the state machine
1605 * then mark it's ifnet not running. If this is the last
1606 * vap running on the underlying device then we close it
1607 * too to insure it will be properly initialized when the
1608 * next vap is brought up.
1609 */
1610 void
1611 ieee80211_stop_locked(struct ieee80211vap *vap)
1612 {
1613 struct ieee80211com *ic = vap->iv_ic;
1614 struct ifnet *ifp = vap->iv_ifp;
1615
1616 IEEE80211_LOCK_ASSERT(ic);
1617
1618 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1619 "stop running, %d vaps running\n", ic->ic_nrunning);
1620
1621 ieee80211_new_state_locked(vap, IEEE80211_S_INIT, -1);
1622 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
1623 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; /* mark us stopped */
1624 if (--ic->ic_nrunning == 0) {
1625 IEEE80211_DPRINTF(vap,
1626 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1627 "down parent %s\n", ic->ic_name);
1628 ieee80211_runtask(ic, &ic->ic_parent_task);
1629 }
1630 }
1631 }
1632
1633 void
1634 ieee80211_stop(struct ieee80211vap *vap)
1635 {
1636 struct ieee80211com *ic = vap->iv_ic;
1637
1638 IEEE80211_LOCK(ic);
1639 ieee80211_stop_locked(vap);
1640 IEEE80211_UNLOCK(ic);
1641 }
1642
1643 /*
1644 * Stop all vap's running on a device.
1645 */
1646 void
1647 ieee80211_stop_all(struct ieee80211com *ic)
1648 {
1649 struct ieee80211vap *vap;
1650
1651 IEEE80211_LOCK(ic);
1652 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1653 struct ifnet *ifp = vap->iv_ifp;
1654 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */
1655 ieee80211_stop_locked(vap);
1656 }
1657 IEEE80211_UNLOCK(ic);
1658
1659 ieee80211_waitfor_parent(ic);
1660 }
1661
1662 /*
1663 * Stop all vap's running on a device and arrange
1664 * for those that were running to be resumed.
1665 */
1666 void
1667 ieee80211_suspend_all(struct ieee80211com *ic)
1668 {
1669 struct ieee80211vap *vap;
1670
1671 IEEE80211_LOCK(ic);
1672 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1673 struct ifnet *ifp = vap->iv_ifp;
1674 if (IFNET_IS_UP_RUNNING(ifp)) { /* NB: avoid recursion */
1675 vap->iv_flags_ext |= IEEE80211_FEXT_RESUME;
1676 ieee80211_stop_locked(vap);
1677 }
1678 }
1679 IEEE80211_UNLOCK(ic);
1680
1681 ieee80211_waitfor_parent(ic);
1682 }
1683
1684 /*
1685 * Start all vap's marked for resume.
1686 */
1687 void
1688 ieee80211_resume_all(struct ieee80211com *ic)
1689 {
1690 struct ieee80211vap *vap;
1691
1692 IEEE80211_LOCK(ic);
1693 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1694 struct ifnet *ifp = vap->iv_ifp;
1695 if (!IFNET_IS_UP_RUNNING(ifp) &&
1696 (vap->iv_flags_ext & IEEE80211_FEXT_RESUME)) {
1697 vap->iv_flags_ext &= ~IEEE80211_FEXT_RESUME;
1698 ieee80211_start_locked(vap);
1699 }
1700 }
1701 IEEE80211_UNLOCK(ic);
1702 }
1703
1704 /*
1705 * Restart all vap's running on a device.
1706 */
1707 void
1708 ieee80211_restart_all(struct ieee80211com *ic)
1709 {
1710 /*
1711 * NB: do not use ieee80211_runtask here, we will
1712 * block & drain net80211 taskqueue.
1713 */
1714 taskqueue_enqueue(taskqueue_thread, &ic->ic_restart_task);
1715 }
1716
1717 void
1718 ieee80211_beacon_miss(struct ieee80211com *ic)
1719 {
1720 IEEE80211_LOCK(ic);
1721 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1722 /* Process in a taskq, the handler may reenter the driver */
1723 ieee80211_runtask(ic, &ic->ic_bmiss_task);
1724 }
1725 IEEE80211_UNLOCK(ic);
1726 }
1727
1728 static void
1729 beacon_miss(void *arg, int npending)
1730 {
1731 struct ieee80211com *ic = arg;
1732 struct ieee80211vap *vap;
1733
1734 IEEE80211_LOCK(ic);
1735 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1736 /*
1737 * We only pass events through for sta vap's in RUN+ state;
1738 * may be too restrictive but for now this saves all the
1739 * handlers duplicating these checks.
1740 */
1741 if (vap->iv_opmode == IEEE80211_M_STA &&
1742 vap->iv_state >= IEEE80211_S_RUN &&
1743 vap->iv_bmiss != NULL)
1744 vap->iv_bmiss(vap);
1745 }
1746 IEEE80211_UNLOCK(ic);
1747 }
1748
1749 static void
1750 beacon_swmiss(void *arg, int npending)
1751 {
1752 struct ieee80211vap *vap = arg;
1753 struct ieee80211com *ic = vap->iv_ic;
1754
1755 IEEE80211_LOCK(ic);
1756 if (vap->iv_state >= IEEE80211_S_RUN) {
1757 /* XXX Call multiple times if npending > zero? */
1758 vap->iv_bmiss(vap);
1759 }
1760 IEEE80211_UNLOCK(ic);
1761 }
1762
1763 /*
1764 * Software beacon miss handling. Check if any beacons
1765 * were received in the last period. If not post a
1766 * beacon miss; otherwise reset the counter.
1767 */
1768 void
1769 ieee80211_swbmiss(void *arg)
1770 {
1771 struct ieee80211vap *vap = arg;
1772 struct ieee80211com *ic = vap->iv_ic;
1773
1774 IEEE80211_LOCK_ASSERT(ic);
1775
1776 KASSERT(vap->iv_state >= IEEE80211_S_RUN,
1777 ("wrong state %d", vap->iv_state));
1778
1779 if (ic->ic_flags & IEEE80211_F_SCAN) {
1780 /*
1781 * If scanning just ignore and reset state. If we get a
1782 * bmiss after coming out of scan because we haven't had
1783 * time to receive a beacon then we should probe the AP
1784 * before posting a real bmiss (unless iv_bmiss_max has
1785 * been artifiically lowered). A cleaner solution might
1786 * be to disable the timer on scan start/end but to handle
1787 * case of multiple sta vap's we'd need to disable the
1788 * timers of all affected vap's.
1789 */
1790 vap->iv_swbmiss_count = 0;
1791 } else if (vap->iv_swbmiss_count == 0) {
1792 if (vap->iv_bmiss != NULL)
1793 ieee80211_runtask(ic, &vap->iv_swbmiss_task);
1794 } else
1795 vap->iv_swbmiss_count = 0;
1796 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period,
1797 ieee80211_swbmiss, vap);
1798 }
1799
1800 /*
1801 * Start an 802.11h channel switch. We record the parameters,
1802 * mark the operation pending, notify each vap through the
1803 * beacon update mechanism so it can update the beacon frame
1804 * contents, and then switch vap's to CSA state to block outbound
1805 * traffic. Devices that handle CSA directly can use the state
1806 * switch to do the right thing so long as they call
1807 * ieee80211_csa_completeswitch when it's time to complete the
1808 * channel change. Devices that depend on the net80211 layer can
1809 * use ieee80211_beacon_update to handle the countdown and the
1810 * channel switch.
1811 */
1812 void
1813 ieee80211_csa_startswitch(struct ieee80211com *ic,
1814 struct ieee80211_channel *c, int mode, int count)
1815 {
1816 struct ieee80211vap *vap;
1817
1818 IEEE80211_LOCK_ASSERT(ic);
1819
1820 ic->ic_csa_newchan = c;
1821 ic->ic_csa_mode = mode;
1822 ic->ic_csa_count = count;
1823 ic->ic_flags |= IEEE80211_F_CSAPENDING;
1824 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1825 if (vap->iv_opmode == IEEE80211_M_HOSTAP ||
1826 vap->iv_opmode == IEEE80211_M_IBSS ||
1827 vap->iv_opmode == IEEE80211_M_MBSS)
1828 ieee80211_beacon_notify(vap, IEEE80211_BEACON_CSA);
1829 /* switch to CSA state to block outbound traffic */
1830 if (vap->iv_state == IEEE80211_S_RUN)
1831 ieee80211_new_state_locked(vap, IEEE80211_S_CSA, 0);
1832 }
1833 ieee80211_notify_csa(ic, c, mode, count);
1834 }
1835
1836 /*
1837 * Complete the channel switch by transitioning all CSA VAPs to RUN.
1838 * This is called by both the completion and cancellation functions
1839 * so each VAP is placed back in the RUN state and can thus transmit.
1840 */
1841 static void
1842 csa_completeswitch(struct ieee80211com *ic)
1843 {
1844 struct ieee80211vap *vap;
1845
1846 ic->ic_csa_newchan = NULL;
1847 ic->ic_flags &= ~IEEE80211_F_CSAPENDING;
1848
1849 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1850 if (vap->iv_state == IEEE80211_S_CSA)
1851 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0);
1852 }
1853
1854 /*
1855 * Complete an 802.11h channel switch started by ieee80211_csa_startswitch.
1856 * We clear state and move all vap's in CSA state to RUN state
1857 * so they can again transmit.
1858 *
1859 * Although this may not be completely correct, update the BSS channel
1860 * for each VAP to the newly configured channel. The setcurchan sets
1861 * the current operating channel for the interface (so the radio does
1862 * switch over) but the VAP BSS isn't updated, leading to incorrectly
1863 * reported information via ioctl.
1864 */
1865 void
1866 ieee80211_csa_completeswitch(struct ieee80211com *ic)
1867 {
1868 struct ieee80211vap *vap;
1869
1870 IEEE80211_LOCK_ASSERT(ic);
1871
1872 KASSERT(ic->ic_flags & IEEE80211_F_CSAPENDING, ("csa not pending"));
1873
1874 ieee80211_setcurchan(ic, ic->ic_csa_newchan);
1875 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1876 if (vap->iv_state == IEEE80211_S_CSA)
1877 vap->iv_bss->ni_chan = ic->ic_curchan;
1878
1879 csa_completeswitch(ic);
1880 }
1881
1882 /*
1883 * Cancel an 802.11h channel switch started by ieee80211_csa_startswitch.
1884 * We clear state and move all vap's in CSA state to RUN state
1885 * so they can again transmit.
1886 */
1887 void
1888 ieee80211_csa_cancelswitch(struct ieee80211com *ic)
1889 {
1890 IEEE80211_LOCK_ASSERT(ic);
1891
1892 csa_completeswitch(ic);
1893 }
1894
1895 /*
1896 * Complete a DFS CAC started by ieee80211_dfs_cac_start.
1897 * We clear state and move all vap's in CAC state to RUN state.
1898 */
1899 void
1900 ieee80211_cac_completeswitch(struct ieee80211vap *vap0)
1901 {
1902 struct ieee80211com *ic = vap0->iv_ic;
1903 struct ieee80211vap *vap;
1904
1905 IEEE80211_LOCK(ic);
1906 /*
1907 * Complete CAC state change for lead vap first; then
1908 * clock all the other vap's waiting.
1909 */
1910 KASSERT(vap0->iv_state == IEEE80211_S_CAC,
1911 ("wrong state %d", vap0->iv_state));
1912 ieee80211_new_state_locked(vap0, IEEE80211_S_RUN, 0);
1913
1914 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1915 if (vap->iv_state == IEEE80211_S_CAC && vap != vap0)
1916 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0);
1917 IEEE80211_UNLOCK(ic);
1918 }
1919
1920 /*
1921 * Force all vap's other than the specified vap to the INIT state
1922 * and mark them as waiting for a scan to complete. These vaps
1923 * will be brought up when the scan completes and the scanning vap
1924 * reaches RUN state by wakeupwaiting.
1925 */
1926 static void
1927 markwaiting(struct ieee80211vap *vap0)
1928 {
1929 struct ieee80211com *ic = vap0->iv_ic;
1930 struct ieee80211vap *vap;
1931
1932 IEEE80211_LOCK_ASSERT(ic);
1933
1934 /*
1935 * A vap list entry can not disappear since we are running on the
1936 * taskqueue and a vap destroy will queue and drain another state
1937 * change task.
1938 */
1939 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1940 if (vap == vap0)
1941 continue;
1942 if (vap->iv_state != IEEE80211_S_INIT) {
1943 /* NB: iv_newstate may drop the lock */
1944 vap->iv_newstate(vap, IEEE80211_S_INIT, 0);
1945 IEEE80211_LOCK_ASSERT(ic);
1946 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT;
1947 }
1948 }
1949 }
1950
1951 /*
1952 * Wakeup all vap's waiting for a scan to complete. This is the
1953 * companion to markwaiting (above) and is used to coordinate
1954 * multiple vaps scanning.
1955 * This is called from the state taskqueue.
1956 */
1957 static void
1958 wakeupwaiting(struct ieee80211vap *vap0)
1959 {
1960 struct ieee80211com *ic = vap0->iv_ic;
1961 struct ieee80211vap *vap;
1962
1963 IEEE80211_LOCK_ASSERT(ic);
1964
1965 /*
1966 * A vap list entry can not disappear since we are running on the
1967 * taskqueue and a vap destroy will queue and drain another state
1968 * change task.
1969 */
1970 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1971 if (vap == vap0)
1972 continue;
1973 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANWAIT) {
1974 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT;
1975 /* NB: sta's cannot go INIT->RUN */
1976 /* NB: iv_newstate may drop the lock */
1977 vap->iv_newstate(vap,
1978 vap->iv_opmode == IEEE80211_M_STA ?
1979 IEEE80211_S_SCAN : IEEE80211_S_RUN, 0);
1980 IEEE80211_LOCK_ASSERT(ic);
1981 }
1982 }
1983 }
1984
1985 /*
1986 * Handle post state change work common to all operating modes.
1987 */
1988 static void
1989 ieee80211_newstate_cb(void *xvap, int npending)
1990 {
1991 struct ieee80211vap *vap = xvap;
1992 struct ieee80211com *ic = vap->iv_ic;
1993 enum ieee80211_state nstate, ostate;
1994 int arg, rc;
1995
1996 IEEE80211_LOCK(ic);
1997 nstate = vap->iv_nstate;
1998 arg = vap->iv_nstate_arg;
1999
2000 if (vap->iv_flags_ext & IEEE80211_FEXT_REINIT) {
2001 /*
2002 * We have been requested to drop back to the INIT before
2003 * proceeding to the new state.
2004 */
2005 /* Deny any state changes while we are here. */
2006 vap->iv_nstate = IEEE80211_S_INIT;
2007 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2008 "%s: %s -> %s arg %d\n", __func__,
2009 ieee80211_state_name[vap->iv_state],
2010 ieee80211_state_name[vap->iv_nstate], arg);
2011 vap->iv_newstate(vap, vap->iv_nstate, 0);
2012 IEEE80211_LOCK_ASSERT(ic);
2013 vap->iv_flags_ext &= ~(IEEE80211_FEXT_REINIT |
2014 IEEE80211_FEXT_STATEWAIT);
2015 /* enqueue new state transition after cancel_scan() task */
2016 ieee80211_new_state_locked(vap, nstate, arg);
2017 goto done;
2018 }
2019
2020 ostate = vap->iv_state;
2021 if (nstate == IEEE80211_S_SCAN && ostate != IEEE80211_S_INIT) {
2022 /*
2023 * SCAN was forced; e.g. on beacon miss. Force other running
2024 * vap's to INIT state and mark them as waiting for the scan to
2025 * complete. This insures they don't interfere with our
2026 * scanning. Since we are single threaded the vaps can not
2027 * transition again while we are executing.
2028 *
2029 * XXX not always right, assumes ap follows sta
2030 */
2031 markwaiting(vap);
2032 }
2033 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2034 "%s: %s -> %s arg %d\n", __func__,
2035 ieee80211_state_name[ostate], ieee80211_state_name[nstate], arg);
2036
2037 rc = vap->iv_newstate(vap, nstate, arg);
2038 IEEE80211_LOCK_ASSERT(ic);
2039 vap->iv_flags_ext &= ~IEEE80211_FEXT_STATEWAIT;
2040 if (rc != 0) {
2041 /* State transition failed */
2042 KASSERT(rc != EINPROGRESS, ("iv_newstate was deferred"));
2043 KASSERT(nstate != IEEE80211_S_INIT,
2044 ("INIT state change failed"));
2045 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2046 "%s: %s returned error %d\n", __func__,
2047 ieee80211_state_name[nstate], rc);
2048 goto done;
2049 }
2050
2051 /* No actual transition, skip post processing */
2052 if (ostate == nstate)
2053 goto done;
2054
2055 if (nstate == IEEE80211_S_RUN) {
2056 /*
2057 * OACTIVE may be set on the vap if the upper layer
2058 * tried to transmit (e.g. IPv6 NDP) before we reach
2059 * RUN state. Clear it and restart xmit.
2060 *
2061 * Note this can also happen as a result of SLEEP->RUN
2062 * (i.e. coming out of power save mode).
2063 */
2064 vap->iv_ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
2065
2066 /*
2067 * XXX TODO Kick-start a VAP queue - this should be a method!
2068 */
2069
2070 /* bring up any vaps waiting on us */
2071 wakeupwaiting(vap);
2072 } else if (nstate == IEEE80211_S_INIT) {
2073 /*
2074 * Flush the scan cache if we did the last scan (XXX?)
2075 * and flush any frames on send queues from this vap.
2076 * Note the mgt q is used only for legacy drivers and
2077 * will go away shortly.
2078 */
2079 ieee80211_scan_flush(vap);
2080
2081 /*
2082 * XXX TODO: ic/vap queue flush
2083 */
2084 }
2085 done:
2086 IEEE80211_UNLOCK(ic);
2087 }
2088
2089 /*
2090 * Public interface for initiating a state machine change.
2091 * This routine single-threads the request and coordinates
2092 * the scheduling of multiple vaps for the purpose of selecting
2093 * an operating channel. Specifically the following scenarios
2094 * are handled:
2095 * o only one vap can be selecting a channel so on transition to
2096 * SCAN state if another vap is already scanning then
2097 * mark the caller for later processing and return without
2098 * doing anything (XXX? expectations by caller of synchronous operation)
2099 * o only one vap can be doing CAC of a channel so on transition to
2100 * CAC state if another vap is already scanning for radar then
2101 * mark the caller for later processing and return without
2102 * doing anything (XXX? expectations by caller of synchronous operation)
2103 * o if another vap is already running when a request is made
2104 * to SCAN then an operating channel has been chosen; bypass
2105 * the scan and just join the channel
2106 *
2107 * Note that the state change call is done through the iv_newstate
2108 * method pointer so any driver routine gets invoked. The driver
2109 * will normally call back into operating mode-specific
2110 * ieee80211_newstate routines (below) unless it needs to completely
2111 * bypass the state machine (e.g. because the firmware has it's
2112 * own idea how things should work). Bypassing the net80211 layer
2113 * is usually a mistake and indicates lack of proper integration
2114 * with the net80211 layer.
2115 */
2116 int
2117 ieee80211_new_state_locked(struct ieee80211vap *vap,
2118 enum ieee80211_state nstate, int arg)
2119 {
2120 struct ieee80211com *ic = vap->iv_ic;
2121 struct ieee80211vap *vp;
2122 enum ieee80211_state ostate;
2123 int nrunning, nscanning;
2124
2125 IEEE80211_LOCK_ASSERT(ic);
2126
2127 if (vap->iv_flags_ext & IEEE80211_FEXT_STATEWAIT) {
2128 if (vap->iv_nstate == IEEE80211_S_INIT ||
2129 ((vap->iv_state == IEEE80211_S_INIT ||
2130 (vap->iv_flags_ext & IEEE80211_FEXT_REINIT)) &&
2131 vap->iv_nstate == IEEE80211_S_SCAN &&
2132 nstate > IEEE80211_S_SCAN)) {
2133 /*
2134 * XXX The vap is being stopped/started,
2135 * do not allow any other state changes
2136 * until this is completed.
2137 */
2138 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2139 "%s: %s -> %s (%s) transition discarded\n",
2140 __func__,
2141 ieee80211_state_name[vap->iv_state],
2142 ieee80211_state_name[nstate],
2143 ieee80211_state_name[vap->iv_nstate]);
2144 return -1;
2145 } else if (vap->iv_state != vap->iv_nstate) {
2146 #if 0
2147 /* Warn if the previous state hasn't completed. */
2148 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2149 "%s: pending %s -> %s transition lost\n", __func__,
2150 ieee80211_state_name[vap->iv_state],
2151 ieee80211_state_name[vap->iv_nstate]);
2152 #else
2153 /* XXX temporarily enable to identify issues */
2154 if_printf(vap->iv_ifp,
2155 "%s: pending %s -> %s transition lost\n",
2156 __func__, ieee80211_state_name[vap->iv_state],
2157 ieee80211_state_name[vap->iv_nstate]);
2158 #endif
2159 }
2160 }
2161
2162 nrunning = nscanning = 0;
2163 /* XXX can track this state instead of calculating */
2164 TAILQ_FOREACH(vp, &ic->ic_vaps, iv_next) {
2165 if (vp != vap) {
2166 if (vp->iv_state >= IEEE80211_S_RUN)
2167 nrunning++;
2168 /* XXX doesn't handle bg scan */
2169 /* NB: CAC+AUTH+ASSOC treated like SCAN */
2170 else if (vp->iv_state > IEEE80211_S_INIT)
2171 nscanning++;
2172 }
2173 }
2174 ostate = vap->iv_state;
2175 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2176 "%s: %s -> %s (nrunning %d nscanning %d)\n", __func__,
2177 ieee80211_state_name[ostate], ieee80211_state_name[nstate],
2178 nrunning, nscanning);
2179 switch (nstate) {
2180 case IEEE80211_S_SCAN:
2181 if (ostate == IEEE80211_S_INIT) {
2182 /*
2183 * INIT -> SCAN happens on initial bringup.
2184 */
2185 KASSERT(!(nscanning && nrunning),
2186 ("%d scanning and %d running", nscanning, nrunning));
2187 if (nscanning) {
2188 /*
2189 * Someone is scanning, defer our state
2190 * change until the work has completed.
2191 */
2192 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2193 "%s: defer %s -> %s\n",
2194 __func__, ieee80211_state_name[ostate],
2195 ieee80211_state_name[nstate]);
2196 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT;
2197 return 0;
2198 }
2199 if (nrunning) {
2200 /*
2201 * Someone is operating; just join the channel
2202 * they have chosen.
2203 */
2204 /* XXX kill arg? */
2205 /* XXX check each opmode, adhoc? */
2206 if (vap->iv_opmode == IEEE80211_M_STA)
2207 nstate = IEEE80211_S_SCAN;
2208 else
2209 nstate = IEEE80211_S_RUN;
2210 #ifdef IEEE80211_DEBUG
2211 if (nstate != IEEE80211_S_SCAN) {
2212 IEEE80211_DPRINTF(vap,
2213 IEEE80211_MSG_STATE,
2214 "%s: override, now %s -> %s\n",
2215 __func__,
2216 ieee80211_state_name[ostate],
2217 ieee80211_state_name[nstate]);
2218 }
2219 #endif
2220 }
2221 }
2222 break;
2223 case IEEE80211_S_RUN:
2224 if (vap->iv_opmode == IEEE80211_M_WDS &&
2225 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) &&
2226 nscanning) {
2227 /*
2228 * Legacy WDS with someone else scanning; don't
2229 * go online until that completes as we should
2230 * follow the other vap to the channel they choose.
2231 */
2232 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2233 "%s: defer %s -> %s (legacy WDS)\n", __func__,
2234 ieee80211_state_name[ostate],
2235 ieee80211_state_name[nstate]);
2236 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT;
2237 return 0;
2238 }
2239 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
2240 IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) &&
2241 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) &&
2242 !IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) {
2243 /*
2244 * This is a DFS channel, transition to CAC state
2245 * instead of RUN. This allows us to initiate
2246 * Channel Availability Check (CAC) as specified
2247 * by 11h/DFS.
2248 */
2249 nstate = IEEE80211_S_CAC;
2250 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2251 "%s: override %s -> %s (DFS)\n", __func__,
2252 ieee80211_state_name[ostate],
2253 ieee80211_state_name[nstate]);
2254 }
2255 break;
2256 case IEEE80211_S_INIT:
2257 /* cancel any scan in progress */
2258 ieee80211_cancel_scan(vap);
2259 if (ostate == IEEE80211_S_INIT ) {
2260 /* XXX don't believe this */
2261 /* INIT -> INIT. nothing to do */
2262 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT;
2263 }
2264 /* fall thru... */
2265 default:
2266 break;
2267 }
2268 /* defer the state change to a thread */
2269 vap->iv_nstate = nstate;
2270 vap->iv_nstate_arg = arg;
2271 vap->iv_flags_ext |= IEEE80211_FEXT_STATEWAIT;
2272 ieee80211_runtask(ic, &vap->iv_nstate_task);
2273 return EINPROGRESS;
2274 }
2275
2276 int
2277 ieee80211_new_state(struct ieee80211vap *vap,
2278 enum ieee80211_state nstate, int arg)
2279 {
2280 struct ieee80211com *ic = vap->iv_ic;
2281 int rc;
2282
2283 IEEE80211_LOCK(ic);
2284 rc = ieee80211_new_state_locked(vap, nstate, arg);
2285 IEEE80211_UNLOCK(ic);
2286 return rc;
2287 }
Cache object: a079df7a8a0981f746d374b0db52a1f7
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