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