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("$FreeBSD$");
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 *
ieee80211_reason_to_string(uint16_t reason)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
null_raw_xmit(struct ieee80211_node * ni,struct mbuf * m,const struct ieee80211_bpf_params * params)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
ieee80211_proto_attach(struct ieee80211com * ic)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
ieee80211_proto_detach(struct ieee80211com * ic)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
null_update_beacon(struct ieee80211vap * vap,int item)318 null_update_beacon(struct ieee80211vap *vap, int item)
319 {
320 }
321
322 void
ieee80211_proto_vattach(struct ieee80211vap * vap)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 if (isclr(ic->ic_modecaps, i))
351 continue;
352
353 const struct ieee80211_rateset *rs = &ic->ic_sup_rates[i];
354
355 vap->iv_txparms[i].ucastrate = IEEE80211_FIXED_RATE_NONE;
356
357 /*
358 * Setting the management rate to MCS 0 assumes that the
359 * BSS Basic rate set is empty and the BSS Basic MCS set
360 * is not.
361 *
362 * Since we're not checking this, default to the lowest
363 * defined rate for this mode.
364 *
365 * At least one 11n AP (DLINK DIR-825) is reported to drop
366 * some MCS management traffic (eg BA response frames.)
367 *
368 * See also: 9.6.0 of the 802.11n-2009 specification.
369 */
370 #ifdef NOTYET
371 if (i == IEEE80211_MODE_11NA || i == IEEE80211_MODE_11NG) {
372 vap->iv_txparms[i].mgmtrate = 0 | IEEE80211_RATE_MCS;
373 vap->iv_txparms[i].mcastrate = 0 | IEEE80211_RATE_MCS;
374 } else {
375 vap->iv_txparms[i].mgmtrate =
376 rs->rs_rates[0] & IEEE80211_RATE_VAL;
377 vap->iv_txparms[i].mcastrate =
378 rs->rs_rates[0] & IEEE80211_RATE_VAL;
379 }
380 #endif
381 vap->iv_txparms[i].mgmtrate = rs->rs_rates[0] & IEEE80211_RATE_VAL;
382 vap->iv_txparms[i].mcastrate = rs->rs_rates[0] & IEEE80211_RATE_VAL;
383 vap->iv_txparms[i].maxretry = IEEE80211_TXMAX_DEFAULT;
384 }
385 vap->iv_roaming = IEEE80211_ROAMING_AUTO;
386
387 vap->iv_update_beacon = null_update_beacon;
388 vap->iv_deliver_data = ieee80211_deliver_data;
389
390 /* attach support for operating mode */
391 ic->ic_vattach[vap->iv_opmode](vap);
392 }
393
394 void
ieee80211_proto_vdetach(struct ieee80211vap * vap)395 ieee80211_proto_vdetach(struct ieee80211vap *vap)
396 {
397 #define FREEAPPIE(ie) do { \
398 if (ie != NULL) \
399 IEEE80211_FREE(ie, M_80211_NODE_IE); \
400 } while (0)
401 /*
402 * Detach operating mode module.
403 */
404 if (vap->iv_opdetach != NULL)
405 vap->iv_opdetach(vap);
406 /*
407 * This should not be needed as we detach when reseting
408 * the state but be conservative here since the
409 * authenticator may do things like spawn kernel threads.
410 */
411 if (vap->iv_auth->ia_detach != NULL)
412 vap->iv_auth->ia_detach(vap);
413 /*
414 * Detach any ACL'ator.
415 */
416 if (vap->iv_acl != NULL)
417 vap->iv_acl->iac_detach(vap);
418
419 FREEAPPIE(vap->iv_appie_beacon);
420 FREEAPPIE(vap->iv_appie_probereq);
421 FREEAPPIE(vap->iv_appie_proberesp);
422 FREEAPPIE(vap->iv_appie_assocreq);
423 FREEAPPIE(vap->iv_appie_assocresp);
424 FREEAPPIE(vap->iv_appie_wpa);
425 #undef FREEAPPIE
426 }
427
428 /*
429 * Simple-minded authenticator module support.
430 */
431
432 #define IEEE80211_AUTH_MAX (IEEE80211_AUTH_WPA+1)
433 /* XXX well-known names */
434 static const char *auth_modnames[IEEE80211_AUTH_MAX] = {
435 "wlan_internal", /* IEEE80211_AUTH_NONE */
436 "wlan_internal", /* IEEE80211_AUTH_OPEN */
437 "wlan_internal", /* IEEE80211_AUTH_SHARED */
438 "wlan_xauth", /* IEEE80211_AUTH_8021X */
439 "wlan_internal", /* IEEE80211_AUTH_AUTO */
440 "wlan_xauth", /* IEEE80211_AUTH_WPA */
441 };
442 static const struct ieee80211_authenticator *authenticators[IEEE80211_AUTH_MAX];
443
444 static const struct ieee80211_authenticator auth_internal = {
445 .ia_name = "wlan_internal",
446 .ia_attach = NULL,
447 .ia_detach = NULL,
448 .ia_node_join = NULL,
449 .ia_node_leave = NULL,
450 };
451
452 /*
453 * Setup internal authenticators once; they are never unregistered.
454 */
455 static void
ieee80211_auth_setup(void)456 ieee80211_auth_setup(void)
457 {
458 ieee80211_authenticator_register(IEEE80211_AUTH_OPEN, &auth_internal);
459 ieee80211_authenticator_register(IEEE80211_AUTH_SHARED, &auth_internal);
460 ieee80211_authenticator_register(IEEE80211_AUTH_AUTO, &auth_internal);
461 }
462 SYSINIT(wlan_auth, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_auth_setup, NULL);
463
464 const struct ieee80211_authenticator *
ieee80211_authenticator_get(int auth)465 ieee80211_authenticator_get(int auth)
466 {
467 if (auth >= IEEE80211_AUTH_MAX)
468 return NULL;
469 if (authenticators[auth] == NULL)
470 ieee80211_load_module(auth_modnames[auth]);
471 return authenticators[auth];
472 }
473
474 void
ieee80211_authenticator_register(int type,const struct ieee80211_authenticator * auth)475 ieee80211_authenticator_register(int type,
476 const struct ieee80211_authenticator *auth)
477 {
478 if (type >= IEEE80211_AUTH_MAX)
479 return;
480 authenticators[type] = auth;
481 }
482
483 void
ieee80211_authenticator_unregister(int type)484 ieee80211_authenticator_unregister(int type)
485 {
486
487 if (type >= IEEE80211_AUTH_MAX)
488 return;
489 authenticators[type] = NULL;
490 }
491
492 /*
493 * Very simple-minded ACL module support.
494 */
495 /* XXX just one for now */
496 static const struct ieee80211_aclator *acl = NULL;
497
498 void
ieee80211_aclator_register(const struct ieee80211_aclator * iac)499 ieee80211_aclator_register(const struct ieee80211_aclator *iac)
500 {
501 printf("wlan: %s acl policy registered\n", iac->iac_name);
502 acl = iac;
503 }
504
505 void
ieee80211_aclator_unregister(const struct ieee80211_aclator * iac)506 ieee80211_aclator_unregister(const struct ieee80211_aclator *iac)
507 {
508 if (acl == iac)
509 acl = NULL;
510 printf("wlan: %s acl policy unregistered\n", iac->iac_name);
511 }
512
513 const struct ieee80211_aclator *
ieee80211_aclator_get(const char * name)514 ieee80211_aclator_get(const char *name)
515 {
516 if (acl == NULL)
517 ieee80211_load_module("wlan_acl");
518 return acl != NULL && strcmp(acl->iac_name, name) == 0 ? acl : NULL;
519 }
520
521 void
ieee80211_print_essid(const uint8_t * essid,int len)522 ieee80211_print_essid(const uint8_t *essid, int len)
523 {
524 const uint8_t *p;
525 int i;
526
527 if (len > IEEE80211_NWID_LEN)
528 len = IEEE80211_NWID_LEN;
529 /* determine printable or not */
530 for (i = 0, p = essid; i < len; i++, p++) {
531 if (*p < ' ' || *p > 0x7e)
532 break;
533 }
534 if (i == len) {
535 printf("\"");
536 for (i = 0, p = essid; i < len; i++, p++)
537 printf("%c", *p);
538 printf("\"");
539 } else {
540 printf("0x");
541 for (i = 0, p = essid; i < len; i++, p++)
542 printf("%02x", *p);
543 }
544 }
545
546 void
ieee80211_dump_pkt(struct ieee80211com * ic,const uint8_t * buf,int len,int rate,int rssi)547 ieee80211_dump_pkt(struct ieee80211com *ic,
548 const uint8_t *buf, int len, int rate, int rssi)
549 {
550 const struct ieee80211_frame *wh;
551 int i;
552
553 wh = (const struct ieee80211_frame *)buf;
554 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) {
555 case IEEE80211_FC1_DIR_NODS:
556 printf("NODS %s", ether_sprintf(wh->i_addr2));
557 printf("->%s", ether_sprintf(wh->i_addr1));
558 printf("(%s)", ether_sprintf(wh->i_addr3));
559 break;
560 case IEEE80211_FC1_DIR_TODS:
561 printf("TODS %s", ether_sprintf(wh->i_addr2));
562 printf("->%s", ether_sprintf(wh->i_addr3));
563 printf("(%s)", ether_sprintf(wh->i_addr1));
564 break;
565 case IEEE80211_FC1_DIR_FROMDS:
566 printf("FRDS %s", ether_sprintf(wh->i_addr3));
567 printf("->%s", ether_sprintf(wh->i_addr1));
568 printf("(%s)", ether_sprintf(wh->i_addr2));
569 break;
570 case IEEE80211_FC1_DIR_DSTODS:
571 printf("DSDS %s", ether_sprintf((const uint8_t *)&wh[1]));
572 printf("->%s", ether_sprintf(wh->i_addr3));
573 printf("(%s", ether_sprintf(wh->i_addr2));
574 printf("->%s)", ether_sprintf(wh->i_addr1));
575 break;
576 }
577 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) {
578 case IEEE80211_FC0_TYPE_DATA:
579 printf(" data");
580 break;
581 case IEEE80211_FC0_TYPE_MGT:
582 printf(" %s", ieee80211_mgt_subtype_name(wh->i_fc[0]));
583 break;
584 default:
585 printf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK);
586 break;
587 }
588 if (IEEE80211_QOS_HAS_SEQ(wh)) {
589 const struct ieee80211_qosframe *qwh =
590 (const struct ieee80211_qosframe *)buf;
591 printf(" QoS [TID %u%s]", qwh->i_qos[0] & IEEE80211_QOS_TID,
592 qwh->i_qos[0] & IEEE80211_QOS_ACKPOLICY ? " ACM" : "");
593 }
594 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
595 int off;
596
597 off = ieee80211_anyhdrspace(ic, wh);
598 printf(" WEP [IV %.02x %.02x %.02x",
599 buf[off+0], buf[off+1], buf[off+2]);
600 if (buf[off+IEEE80211_WEP_IVLEN] & IEEE80211_WEP_EXTIV)
601 printf(" %.02x %.02x %.02x",
602 buf[off+4], buf[off+5], buf[off+6]);
603 printf(" KID %u]", buf[off+IEEE80211_WEP_IVLEN] >> 6);
604 }
605 if (rate >= 0)
606 printf(" %dM", rate / 2);
607 if (rssi >= 0)
608 printf(" +%d", rssi);
609 printf("\n");
610 if (len > 0) {
611 for (i = 0; i < len; i++) {
612 if ((i & 1) == 0)
613 printf(" ");
614 printf("%02x", buf[i]);
615 }
616 printf("\n");
617 }
618 }
619
620 static __inline int
findrix(const struct ieee80211_rateset * rs,int r)621 findrix(const struct ieee80211_rateset *rs, int r)
622 {
623 int i;
624
625 for (i = 0; i < rs->rs_nrates; i++)
626 if ((rs->rs_rates[i] & IEEE80211_RATE_VAL) == r)
627 return i;
628 return -1;
629 }
630
631 int
ieee80211_fix_rate(struct ieee80211_node * ni,struct ieee80211_rateset * nrs,int flags)632 ieee80211_fix_rate(struct ieee80211_node *ni,
633 struct ieee80211_rateset *nrs, int flags)
634 {
635 struct ieee80211vap *vap = ni->ni_vap;
636 struct ieee80211com *ic = ni->ni_ic;
637 int i, j, rix, error;
638 int okrate, badrate, fixedrate, ucastrate;
639 const struct ieee80211_rateset *srs;
640 uint8_t r;
641
642 error = 0;
643 okrate = badrate = 0;
644 ucastrate = vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)].ucastrate;
645 if (ucastrate != IEEE80211_FIXED_RATE_NONE) {
646 /*
647 * Workaround awkwardness with fixed rate. We are called
648 * to check both the legacy rate set and the HT rate set
649 * but we must apply any legacy fixed rate check only to the
650 * legacy rate set and vice versa. We cannot tell what type
651 * of rate set we've been given (legacy or HT) but we can
652 * distinguish the fixed rate type (MCS have 0x80 set).
653 * So to deal with this the caller communicates whether to
654 * check MCS or legacy rate using the flags and we use the
655 * type of any fixed rate to avoid applying an MCS to a
656 * legacy rate and vice versa.
657 */
658 if (ucastrate & 0x80) {
659 if (flags & IEEE80211_F_DOFRATE)
660 flags &= ~IEEE80211_F_DOFRATE;
661 } else if ((ucastrate & 0x80) == 0) {
662 if (flags & IEEE80211_F_DOFMCS)
663 flags &= ~IEEE80211_F_DOFMCS;
664 }
665 /* NB: required to make MCS match below work */
666 ucastrate &= IEEE80211_RATE_VAL;
667 }
668 fixedrate = IEEE80211_FIXED_RATE_NONE;
669 /*
670 * XXX we are called to process both MCS and legacy rates;
671 * we must use the appropriate basic rate set or chaos will
672 * ensue; for now callers that want MCS must supply
673 * IEEE80211_F_DOBRS; at some point we'll need to split this
674 * function so there are two variants, one for MCS and one
675 * for legacy rates.
676 */
677 if (flags & IEEE80211_F_DOBRS)
678 srs = (const struct ieee80211_rateset *)
679 ieee80211_get_suphtrates(ic, ni->ni_chan);
680 else
681 srs = ieee80211_get_suprates(ic, ni->ni_chan);
682 for (i = 0; i < nrs->rs_nrates; ) {
683 if (flags & IEEE80211_F_DOSORT) {
684 /*
685 * Sort rates.
686 */
687 for (j = i + 1; j < nrs->rs_nrates; j++) {
688 if (IEEE80211_RV(nrs->rs_rates[i]) >
689 IEEE80211_RV(nrs->rs_rates[j])) {
690 r = nrs->rs_rates[i];
691 nrs->rs_rates[i] = nrs->rs_rates[j];
692 nrs->rs_rates[j] = r;
693 }
694 }
695 }
696 r = nrs->rs_rates[i] & IEEE80211_RATE_VAL;
697 badrate = r;
698 /*
699 * Check for fixed rate.
700 */
701 if (r == ucastrate)
702 fixedrate = r;
703 /*
704 * Check against supported rates.
705 */
706 rix = findrix(srs, r);
707 if (flags & IEEE80211_F_DONEGO) {
708 if (rix < 0) {
709 /*
710 * A rate in the node's rate set is not
711 * supported. If this is a basic rate and we
712 * are operating as a STA then this is an error.
713 * Otherwise we just discard/ignore the rate.
714 */
715 if ((flags & IEEE80211_F_JOIN) &&
716 (nrs->rs_rates[i] & IEEE80211_RATE_BASIC))
717 error++;
718 } else if ((flags & IEEE80211_F_JOIN) == 0) {
719 /*
720 * Overwrite with the supported rate
721 * value so any basic rate bit is set.
722 */
723 nrs->rs_rates[i] = srs->rs_rates[rix];
724 }
725 }
726 if ((flags & IEEE80211_F_DODEL) && rix < 0) {
727 /*
728 * Delete unacceptable rates.
729 */
730 nrs->rs_nrates--;
731 for (j = i; j < nrs->rs_nrates; j++)
732 nrs->rs_rates[j] = nrs->rs_rates[j + 1];
733 nrs->rs_rates[j] = 0;
734 continue;
735 }
736 if (rix >= 0)
737 okrate = nrs->rs_rates[i];
738 i++;
739 }
740 if (okrate == 0 || error != 0 ||
741 ((flags & (IEEE80211_F_DOFRATE|IEEE80211_F_DOFMCS)) &&
742 fixedrate != ucastrate)) {
743 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni,
744 "%s: flags 0x%x okrate %d error %d fixedrate 0x%x "
745 "ucastrate %x\n", __func__, fixedrate, ucastrate, flags);
746 return badrate | IEEE80211_RATE_BASIC;
747 } else
748 return IEEE80211_RV(okrate);
749 }
750
751 /*
752 * Reset 11g-related state.
753 */
754 void
ieee80211_reset_erp(struct ieee80211com * ic)755 ieee80211_reset_erp(struct ieee80211com *ic)
756 {
757 ic->ic_flags &= ~IEEE80211_F_USEPROT;
758 ic->ic_nonerpsta = 0;
759 ic->ic_longslotsta = 0;
760 /*
761 * Short slot time is enabled only when operating in 11g
762 * and not in an IBSS. We must also honor whether or not
763 * the driver is capable of doing it.
764 */
765 ieee80211_set_shortslottime(ic,
766 IEEE80211_IS_CHAN_A(ic->ic_curchan) ||
767 IEEE80211_IS_CHAN_HT(ic->ic_curchan) ||
768 (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
769 ic->ic_opmode == IEEE80211_M_HOSTAP &&
770 (ic->ic_caps & IEEE80211_C_SHSLOT)));
771 /*
772 * Set short preamble and ERP barker-preamble flags.
773 */
774 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) ||
775 (ic->ic_caps & IEEE80211_C_SHPREAMBLE)) {
776 ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
777 ic->ic_flags &= ~IEEE80211_F_USEBARKER;
778 } else {
779 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
780 ic->ic_flags |= IEEE80211_F_USEBARKER;
781 }
782 }
783
784 /*
785 * Set the short slot time state and notify the driver.
786 */
787 void
ieee80211_set_shortslottime(struct ieee80211com * ic,int onoff)788 ieee80211_set_shortslottime(struct ieee80211com *ic, int onoff)
789 {
790 if (onoff)
791 ic->ic_flags |= IEEE80211_F_SHSLOT;
792 else
793 ic->ic_flags &= ~IEEE80211_F_SHSLOT;
794 /* notify driver */
795 if (ic->ic_updateslot != NULL)
796 ic->ic_updateslot(ic);
797 }
798
799 /*
800 * Check if the specified rate set supports ERP.
801 * NB: the rate set is assumed to be sorted.
802 */
803 int
ieee80211_iserp_rateset(const struct ieee80211_rateset * rs)804 ieee80211_iserp_rateset(const struct ieee80211_rateset *rs)
805 {
806 static const int rates[] = { 2, 4, 11, 22, 12, 24, 48 };
807 int i, j;
808
809 if (rs->rs_nrates < nitems(rates))
810 return 0;
811 for (i = 0; i < nitems(rates); i++) {
812 for (j = 0; j < rs->rs_nrates; j++) {
813 int r = rs->rs_rates[j] & IEEE80211_RATE_VAL;
814 if (rates[i] == r)
815 goto next;
816 if (r > rates[i])
817 return 0;
818 }
819 return 0;
820 next:
821 ;
822 }
823 return 1;
824 }
825
826 /*
827 * Mark the basic rates for the rate table based on the
828 * operating mode. For real 11g we mark all the 11b rates
829 * and 6, 12, and 24 OFDM. For 11b compatibility we mark only
830 * 11b rates. There's also a pseudo 11a-mode used to mark only
831 * the basic OFDM rates.
832 */
833 static void
setbasicrates(struct ieee80211_rateset * rs,enum ieee80211_phymode mode,int add)834 setbasicrates(struct ieee80211_rateset *rs,
835 enum ieee80211_phymode mode, int add)
836 {
837 static const struct ieee80211_rateset basic[IEEE80211_MODE_MAX] = {
838 [IEEE80211_MODE_11A] = { 3, { 12, 24, 48 } },
839 [IEEE80211_MODE_11B] = { 2, { 2, 4 } },
840 /* NB: mixed b/g */
841 [IEEE80211_MODE_11G] = { 4, { 2, 4, 11, 22 } },
842 [IEEE80211_MODE_TURBO_A] = { 3, { 12, 24, 48 } },
843 [IEEE80211_MODE_TURBO_G] = { 4, { 2, 4, 11, 22 } },
844 [IEEE80211_MODE_STURBO_A] = { 3, { 12, 24, 48 } },
845 [IEEE80211_MODE_HALF] = { 3, { 6, 12, 24 } },
846 [IEEE80211_MODE_QUARTER] = { 3, { 3, 6, 12 } },
847 [IEEE80211_MODE_11NA] = { 3, { 12, 24, 48 } },
848 /* NB: mixed b/g */
849 [IEEE80211_MODE_11NG] = { 4, { 2, 4, 11, 22 } },
850 /* NB: mixed b/g */
851 [IEEE80211_MODE_VHT_2GHZ] = { 4, { 2, 4, 11, 22 } },
852 [IEEE80211_MODE_VHT_5GHZ] = { 3, { 12, 24, 48 } },
853 };
854 int i, j;
855
856 for (i = 0; i < rs->rs_nrates; i++) {
857 if (!add)
858 rs->rs_rates[i] &= IEEE80211_RATE_VAL;
859 for (j = 0; j < basic[mode].rs_nrates; j++)
860 if (basic[mode].rs_rates[j] == rs->rs_rates[i]) {
861 rs->rs_rates[i] |= IEEE80211_RATE_BASIC;
862 break;
863 }
864 }
865 }
866
867 /*
868 * Set the basic rates in a rate set.
869 */
870 void
ieee80211_setbasicrates(struct ieee80211_rateset * rs,enum ieee80211_phymode mode)871 ieee80211_setbasicrates(struct ieee80211_rateset *rs,
872 enum ieee80211_phymode mode)
873 {
874 setbasicrates(rs, mode, 0);
875 }
876
877 /*
878 * Add basic rates to a rate set.
879 */
880 void
ieee80211_addbasicrates(struct ieee80211_rateset * rs,enum ieee80211_phymode mode)881 ieee80211_addbasicrates(struct ieee80211_rateset *rs,
882 enum ieee80211_phymode mode)
883 {
884 setbasicrates(rs, mode, 1);
885 }
886
887 /*
888 * WME protocol support.
889 *
890 * The default 11a/b/g/n parameters come from the WiFi Alliance WMM
891 * System Interopability Test Plan (v1.4, Appendix F) and the 802.11n
892 * Draft 2.0 Test Plan (Appendix D).
893 *
894 * Static/Dynamic Turbo mode settings come from Atheros.
895 */
896 typedef struct phyParamType {
897 uint8_t aifsn;
898 uint8_t logcwmin;
899 uint8_t logcwmax;
900 uint16_t txopLimit;
901 uint8_t acm;
902 } paramType;
903
904 static const struct phyParamType phyParamForAC_BE[IEEE80211_MODE_MAX] = {
905 [IEEE80211_MODE_AUTO] = { 3, 4, 6, 0, 0 },
906 [IEEE80211_MODE_11A] = { 3, 4, 6, 0, 0 },
907 [IEEE80211_MODE_11B] = { 3, 4, 6, 0, 0 },
908 [IEEE80211_MODE_11G] = { 3, 4, 6, 0, 0 },
909 [IEEE80211_MODE_FH] = { 3, 4, 6, 0, 0 },
910 [IEEE80211_MODE_TURBO_A]= { 2, 3, 5, 0, 0 },
911 [IEEE80211_MODE_TURBO_G]= { 2, 3, 5, 0, 0 },
912 [IEEE80211_MODE_STURBO_A]={ 2, 3, 5, 0, 0 },
913 [IEEE80211_MODE_HALF] = { 3, 4, 6, 0, 0 },
914 [IEEE80211_MODE_QUARTER]= { 3, 4, 6, 0, 0 },
915 [IEEE80211_MODE_11NA] = { 3, 4, 6, 0, 0 },
916 [IEEE80211_MODE_11NG] = { 3, 4, 6, 0, 0 },
917 [IEEE80211_MODE_VHT_2GHZ] = { 3, 4, 6, 0, 0 },
918 [IEEE80211_MODE_VHT_5GHZ] = { 3, 4, 6, 0, 0 },
919 };
920 static const struct phyParamType phyParamForAC_BK[IEEE80211_MODE_MAX] = {
921 [IEEE80211_MODE_AUTO] = { 7, 4, 10, 0, 0 },
922 [IEEE80211_MODE_11A] = { 7, 4, 10, 0, 0 },
923 [IEEE80211_MODE_11B] = { 7, 4, 10, 0, 0 },
924 [IEEE80211_MODE_11G] = { 7, 4, 10, 0, 0 },
925 [IEEE80211_MODE_FH] = { 7, 4, 10, 0, 0 },
926 [IEEE80211_MODE_TURBO_A]= { 7, 3, 10, 0, 0 },
927 [IEEE80211_MODE_TURBO_G]= { 7, 3, 10, 0, 0 },
928 [IEEE80211_MODE_STURBO_A]={ 7, 3, 10, 0, 0 },
929 [IEEE80211_MODE_HALF] = { 7, 4, 10, 0, 0 },
930 [IEEE80211_MODE_QUARTER]= { 7, 4, 10, 0, 0 },
931 [IEEE80211_MODE_11NA] = { 7, 4, 10, 0, 0 },
932 [IEEE80211_MODE_11NG] = { 7, 4, 10, 0, 0 },
933 [IEEE80211_MODE_VHT_2GHZ] = { 7, 4, 10, 0, 0 },
934 [IEEE80211_MODE_VHT_5GHZ] = { 7, 4, 10, 0, 0 },
935 };
936 static const struct phyParamType phyParamForAC_VI[IEEE80211_MODE_MAX] = {
937 [IEEE80211_MODE_AUTO] = { 1, 3, 4, 94, 0 },
938 [IEEE80211_MODE_11A] = { 1, 3, 4, 94, 0 },
939 [IEEE80211_MODE_11B] = { 1, 3, 4, 188, 0 },
940 [IEEE80211_MODE_11G] = { 1, 3, 4, 94, 0 },
941 [IEEE80211_MODE_FH] = { 1, 3, 4, 188, 0 },
942 [IEEE80211_MODE_TURBO_A]= { 1, 2, 3, 94, 0 },
943 [IEEE80211_MODE_TURBO_G]= { 1, 2, 3, 94, 0 },
944 [IEEE80211_MODE_STURBO_A]={ 1, 2, 3, 94, 0 },
945 [IEEE80211_MODE_HALF] = { 1, 3, 4, 94, 0 },
946 [IEEE80211_MODE_QUARTER]= { 1, 3, 4, 94, 0 },
947 [IEEE80211_MODE_11NA] = { 1, 3, 4, 94, 0 },
948 [IEEE80211_MODE_11NG] = { 1, 3, 4, 94, 0 },
949 [IEEE80211_MODE_VHT_2GHZ] = { 1, 3, 4, 94, 0 },
950 [IEEE80211_MODE_VHT_5GHZ] = { 1, 3, 4, 94, 0 },
951 };
952 static const struct phyParamType phyParamForAC_VO[IEEE80211_MODE_MAX] = {
953 [IEEE80211_MODE_AUTO] = { 1, 2, 3, 47, 0 },
954 [IEEE80211_MODE_11A] = { 1, 2, 3, 47, 0 },
955 [IEEE80211_MODE_11B] = { 1, 2, 3, 102, 0 },
956 [IEEE80211_MODE_11G] = { 1, 2, 3, 47, 0 },
957 [IEEE80211_MODE_FH] = { 1, 2, 3, 102, 0 },
958 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 },
959 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 },
960 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 },
961 [IEEE80211_MODE_HALF] = { 1, 2, 3, 47, 0 },
962 [IEEE80211_MODE_QUARTER]= { 1, 2, 3, 47, 0 },
963 [IEEE80211_MODE_11NA] = { 1, 2, 3, 47, 0 },
964 [IEEE80211_MODE_11NG] = { 1, 2, 3, 47, 0 },
965 [IEEE80211_MODE_VHT_2GHZ] = { 1, 2, 3, 47, 0 },
966 [IEEE80211_MODE_VHT_5GHZ] = { 1, 2, 3, 47, 0 },
967 };
968
969 static const struct phyParamType bssPhyParamForAC_BE[IEEE80211_MODE_MAX] = {
970 [IEEE80211_MODE_AUTO] = { 3, 4, 10, 0, 0 },
971 [IEEE80211_MODE_11A] = { 3, 4, 10, 0, 0 },
972 [IEEE80211_MODE_11B] = { 3, 4, 10, 0, 0 },
973 [IEEE80211_MODE_11G] = { 3, 4, 10, 0, 0 },
974 [IEEE80211_MODE_FH] = { 3, 4, 10, 0, 0 },
975 [IEEE80211_MODE_TURBO_A]= { 2, 3, 10, 0, 0 },
976 [IEEE80211_MODE_TURBO_G]= { 2, 3, 10, 0, 0 },
977 [IEEE80211_MODE_STURBO_A]={ 2, 3, 10, 0, 0 },
978 [IEEE80211_MODE_HALF] = { 3, 4, 10, 0, 0 },
979 [IEEE80211_MODE_QUARTER]= { 3, 4, 10, 0, 0 },
980 [IEEE80211_MODE_11NA] = { 3, 4, 10, 0, 0 },
981 [IEEE80211_MODE_11NG] = { 3, 4, 10, 0, 0 },
982 };
983 static const struct phyParamType bssPhyParamForAC_VI[IEEE80211_MODE_MAX] = {
984 [IEEE80211_MODE_AUTO] = { 2, 3, 4, 94, 0 },
985 [IEEE80211_MODE_11A] = { 2, 3, 4, 94, 0 },
986 [IEEE80211_MODE_11B] = { 2, 3, 4, 188, 0 },
987 [IEEE80211_MODE_11G] = { 2, 3, 4, 94, 0 },
988 [IEEE80211_MODE_FH] = { 2, 3, 4, 188, 0 },
989 [IEEE80211_MODE_TURBO_A]= { 2, 2, 3, 94, 0 },
990 [IEEE80211_MODE_TURBO_G]= { 2, 2, 3, 94, 0 },
991 [IEEE80211_MODE_STURBO_A]={ 2, 2, 3, 94, 0 },
992 [IEEE80211_MODE_HALF] = { 2, 3, 4, 94, 0 },
993 [IEEE80211_MODE_QUARTER]= { 2, 3, 4, 94, 0 },
994 [IEEE80211_MODE_11NA] = { 2, 3, 4, 94, 0 },
995 [IEEE80211_MODE_11NG] = { 2, 3, 4, 94, 0 },
996 };
997 static const struct phyParamType bssPhyParamForAC_VO[IEEE80211_MODE_MAX] = {
998 [IEEE80211_MODE_AUTO] = { 2, 2, 3, 47, 0 },
999 [IEEE80211_MODE_11A] = { 2, 2, 3, 47, 0 },
1000 [IEEE80211_MODE_11B] = { 2, 2, 3, 102, 0 },
1001 [IEEE80211_MODE_11G] = { 2, 2, 3, 47, 0 },
1002 [IEEE80211_MODE_FH] = { 2, 2, 3, 102, 0 },
1003 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 },
1004 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 },
1005 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 },
1006 [IEEE80211_MODE_HALF] = { 2, 2, 3, 47, 0 },
1007 [IEEE80211_MODE_QUARTER]= { 2, 2, 3, 47, 0 },
1008 [IEEE80211_MODE_11NA] = { 2, 2, 3, 47, 0 },
1009 [IEEE80211_MODE_11NG] = { 2, 2, 3, 47, 0 },
1010 };
1011
1012 static void
_setifsparams(struct wmeParams * wmep,const paramType * phy)1013 _setifsparams(struct wmeParams *wmep, const paramType *phy)
1014 {
1015 wmep->wmep_aifsn = phy->aifsn;
1016 wmep->wmep_logcwmin = phy->logcwmin;
1017 wmep->wmep_logcwmax = phy->logcwmax;
1018 wmep->wmep_txopLimit = phy->txopLimit;
1019 }
1020
1021 static void
setwmeparams(struct ieee80211vap * vap,const char * type,int ac,struct wmeParams * wmep,const paramType * phy)1022 setwmeparams(struct ieee80211vap *vap, const char *type, int ac,
1023 struct wmeParams *wmep, const paramType *phy)
1024 {
1025 wmep->wmep_acm = phy->acm;
1026 _setifsparams(wmep, phy);
1027
1028 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1029 "set %s (%s) [acm %u aifsn %u logcwmin %u logcwmax %u txop %u]\n",
1030 ieee80211_wme_acnames[ac], type,
1031 wmep->wmep_acm, wmep->wmep_aifsn, wmep->wmep_logcwmin,
1032 wmep->wmep_logcwmax, wmep->wmep_txopLimit);
1033 }
1034
1035 static void
ieee80211_wme_initparams_locked(struct ieee80211vap * vap)1036 ieee80211_wme_initparams_locked(struct ieee80211vap *vap)
1037 {
1038 struct ieee80211com *ic = vap->iv_ic;
1039 struct ieee80211_wme_state *wme = &ic->ic_wme;
1040 const paramType *pPhyParam, *pBssPhyParam;
1041 struct wmeParams *wmep;
1042 enum ieee80211_phymode mode;
1043 int i;
1044
1045 IEEE80211_LOCK_ASSERT(ic);
1046
1047 if ((ic->ic_caps & IEEE80211_C_WME) == 0 || ic->ic_nrunning > 1)
1048 return;
1049
1050 /*
1051 * Clear the wme cap_info field so a qoscount from a previous
1052 * vap doesn't confuse later code which only parses the beacon
1053 * field and updates hardware when said field changes.
1054 * Otherwise the hardware is programmed with defaults, not what
1055 * the beacon actually announces.
1056 */
1057 wme->wme_wmeChanParams.cap_info = 0;
1058
1059 /*
1060 * Select mode; we can be called early in which case we
1061 * always use auto mode. We know we'll be called when
1062 * entering the RUN state with bsschan setup properly
1063 * so state will eventually get set correctly
1064 */
1065 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC)
1066 mode = ieee80211_chan2mode(ic->ic_bsschan);
1067 else
1068 mode = IEEE80211_MODE_AUTO;
1069 for (i = 0; i < WME_NUM_AC; i++) {
1070 switch (i) {
1071 case WME_AC_BK:
1072 pPhyParam = &phyParamForAC_BK[mode];
1073 pBssPhyParam = &phyParamForAC_BK[mode];
1074 break;
1075 case WME_AC_VI:
1076 pPhyParam = &phyParamForAC_VI[mode];
1077 pBssPhyParam = &bssPhyParamForAC_VI[mode];
1078 break;
1079 case WME_AC_VO:
1080 pPhyParam = &phyParamForAC_VO[mode];
1081 pBssPhyParam = &bssPhyParamForAC_VO[mode];
1082 break;
1083 case WME_AC_BE:
1084 default:
1085 pPhyParam = &phyParamForAC_BE[mode];
1086 pBssPhyParam = &bssPhyParamForAC_BE[mode];
1087 break;
1088 }
1089 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i];
1090 if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
1091 setwmeparams(vap, "chan", i, wmep, pPhyParam);
1092 } else {
1093 setwmeparams(vap, "chan", i, wmep, pBssPhyParam);
1094 }
1095 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i];
1096 setwmeparams(vap, "bss ", i, wmep, pBssPhyParam);
1097 }
1098 /* NB: check ic_bss to avoid NULL deref on initial attach */
1099 if (vap->iv_bss != NULL) {
1100 /*
1101 * Calculate aggressive mode switching threshold based
1102 * on beacon interval. This doesn't need locking since
1103 * we're only called before entering the RUN state at
1104 * which point we start sending beacon frames.
1105 */
1106 wme->wme_hipri_switch_thresh =
1107 (HIGH_PRI_SWITCH_THRESH * vap->iv_bss->ni_intval) / 100;
1108 wme->wme_flags &= ~WME_F_AGGRMODE;
1109 ieee80211_wme_updateparams(vap);
1110 }
1111 }
1112
1113 void
ieee80211_wme_initparams(struct ieee80211vap * vap)1114 ieee80211_wme_initparams(struct ieee80211vap *vap)
1115 {
1116 struct ieee80211com *ic = vap->iv_ic;
1117
1118 IEEE80211_LOCK(ic);
1119 ieee80211_wme_initparams_locked(vap);
1120 IEEE80211_UNLOCK(ic);
1121 }
1122
1123 /*
1124 * Update WME parameters for ourself and the BSS.
1125 */
1126 void
ieee80211_wme_updateparams_locked(struct ieee80211vap * vap)1127 ieee80211_wme_updateparams_locked(struct ieee80211vap *vap)
1128 {
1129 static const paramType aggrParam[IEEE80211_MODE_MAX] = {
1130 [IEEE80211_MODE_AUTO] = { 2, 4, 10, 64, 0 },
1131 [IEEE80211_MODE_11A] = { 2, 4, 10, 64, 0 },
1132 [IEEE80211_MODE_11B] = { 2, 5, 10, 64, 0 },
1133 [IEEE80211_MODE_11G] = { 2, 4, 10, 64, 0 },
1134 [IEEE80211_MODE_FH] = { 2, 5, 10, 64, 0 },
1135 [IEEE80211_MODE_TURBO_A] = { 1, 3, 10, 64, 0 },
1136 [IEEE80211_MODE_TURBO_G] = { 1, 3, 10, 64, 0 },
1137 [IEEE80211_MODE_STURBO_A] = { 1, 3, 10, 64, 0 },
1138 [IEEE80211_MODE_HALF] = { 2, 4, 10, 64, 0 },
1139 [IEEE80211_MODE_QUARTER] = { 2, 4, 10, 64, 0 },
1140 [IEEE80211_MODE_11NA] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/
1141 [IEEE80211_MODE_11NG] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/
1142 [IEEE80211_MODE_VHT_2GHZ] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/
1143 [IEEE80211_MODE_VHT_5GHZ] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/
1144 };
1145 struct ieee80211com *ic = vap->iv_ic;
1146 struct ieee80211_wme_state *wme = &ic->ic_wme;
1147 const struct wmeParams *wmep;
1148 struct wmeParams *chanp, *bssp;
1149 enum ieee80211_phymode mode;
1150 int i;
1151 int do_aggrmode = 0;
1152
1153 /*
1154 * Set up the channel access parameters for the physical
1155 * device. First populate the configured settings.
1156 */
1157 for (i = 0; i < WME_NUM_AC; i++) {
1158 chanp = &wme->wme_chanParams.cap_wmeParams[i];
1159 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i];
1160 chanp->wmep_aifsn = wmep->wmep_aifsn;
1161 chanp->wmep_logcwmin = wmep->wmep_logcwmin;
1162 chanp->wmep_logcwmax = wmep->wmep_logcwmax;
1163 chanp->wmep_txopLimit = wmep->wmep_txopLimit;
1164
1165 chanp = &wme->wme_bssChanParams.cap_wmeParams[i];
1166 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i];
1167 chanp->wmep_aifsn = wmep->wmep_aifsn;
1168 chanp->wmep_logcwmin = wmep->wmep_logcwmin;
1169 chanp->wmep_logcwmax = wmep->wmep_logcwmax;
1170 chanp->wmep_txopLimit = wmep->wmep_txopLimit;
1171 }
1172
1173 /*
1174 * Select mode; we can be called early in which case we
1175 * always use auto mode. We know we'll be called when
1176 * entering the RUN state with bsschan setup properly
1177 * so state will eventually get set correctly
1178 */
1179 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC)
1180 mode = ieee80211_chan2mode(ic->ic_bsschan);
1181 else
1182 mode = IEEE80211_MODE_AUTO;
1183
1184 /*
1185 * This implements aggressive mode as found in certain
1186 * vendors' AP's. When there is significant high
1187 * priority (VI/VO) traffic in the BSS throttle back BE
1188 * traffic by using conservative parameters. Otherwise
1189 * BE uses aggressive params to optimize performance of
1190 * legacy/non-QoS traffic.
1191 */
1192
1193 /* Hostap? Only if aggressive mode is enabled */
1194 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
1195 (wme->wme_flags & WME_F_AGGRMODE) != 0)
1196 do_aggrmode = 1;
1197
1198 /*
1199 * Station? Only if we're in a non-QoS BSS.
1200 */
1201 else if ((vap->iv_opmode == IEEE80211_M_STA &&
1202 (vap->iv_bss->ni_flags & IEEE80211_NODE_QOS) == 0))
1203 do_aggrmode = 1;
1204
1205 /*
1206 * IBSS? Only if we we have WME enabled.
1207 */
1208 else if ((vap->iv_opmode == IEEE80211_M_IBSS) &&
1209 (vap->iv_flags & IEEE80211_F_WME))
1210 do_aggrmode = 1;
1211
1212 /*
1213 * If WME is disabled on this VAP, default to aggressive mode
1214 * regardless of the configuration.
1215 */
1216 if ((vap->iv_flags & IEEE80211_F_WME) == 0)
1217 do_aggrmode = 1;
1218
1219 /* XXX WDS? */
1220
1221 /* XXX MBSS? */
1222
1223 if (do_aggrmode) {
1224 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE];
1225 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE];
1226
1227 chanp->wmep_aifsn = bssp->wmep_aifsn = aggrParam[mode].aifsn;
1228 chanp->wmep_logcwmin = bssp->wmep_logcwmin =
1229 aggrParam[mode].logcwmin;
1230 chanp->wmep_logcwmax = bssp->wmep_logcwmax =
1231 aggrParam[mode].logcwmax;
1232 chanp->wmep_txopLimit = bssp->wmep_txopLimit =
1233 (vap->iv_flags & IEEE80211_F_BURST) ?
1234 aggrParam[mode].txopLimit : 0;
1235 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1236 "update %s (chan+bss) [acm %u aifsn %u logcwmin %u "
1237 "logcwmax %u txop %u]\n", ieee80211_wme_acnames[WME_AC_BE],
1238 chanp->wmep_acm, chanp->wmep_aifsn, chanp->wmep_logcwmin,
1239 chanp->wmep_logcwmax, chanp->wmep_txopLimit);
1240 }
1241
1242
1243 /*
1244 * Change the contention window based on the number of associated
1245 * stations. If the number of associated stations is 1 and
1246 * aggressive mode is enabled, lower the contention window even
1247 * further.
1248 */
1249 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
1250 ic->ic_sta_assoc < 2 && (wme->wme_flags & WME_F_AGGRMODE) != 0) {
1251 static const uint8_t logCwMin[IEEE80211_MODE_MAX] = {
1252 [IEEE80211_MODE_AUTO] = 3,
1253 [IEEE80211_MODE_11A] = 3,
1254 [IEEE80211_MODE_11B] = 4,
1255 [IEEE80211_MODE_11G] = 3,
1256 [IEEE80211_MODE_FH] = 4,
1257 [IEEE80211_MODE_TURBO_A] = 3,
1258 [IEEE80211_MODE_TURBO_G] = 3,
1259 [IEEE80211_MODE_STURBO_A] = 3,
1260 [IEEE80211_MODE_HALF] = 3,
1261 [IEEE80211_MODE_QUARTER] = 3,
1262 [IEEE80211_MODE_11NA] = 3,
1263 [IEEE80211_MODE_11NG] = 3,
1264 [IEEE80211_MODE_VHT_2GHZ] = 3,
1265 [IEEE80211_MODE_VHT_5GHZ] = 3,
1266 };
1267 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE];
1268 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE];
1269
1270 chanp->wmep_logcwmin = bssp->wmep_logcwmin = logCwMin[mode];
1271 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1272 "update %s (chan+bss) logcwmin %u\n",
1273 ieee80211_wme_acnames[WME_AC_BE], chanp->wmep_logcwmin);
1274 }
1275
1276 /*
1277 * Arrange for the beacon update.
1278 *
1279 * XXX what about MBSS, WDS?
1280 */
1281 if (vap->iv_opmode == IEEE80211_M_HOSTAP
1282 || vap->iv_opmode == IEEE80211_M_IBSS) {
1283 /*
1284 * Arrange for a beacon update and bump the parameter
1285 * set number so associated stations load the new values.
1286 */
1287 wme->wme_bssChanParams.cap_info =
1288 (wme->wme_bssChanParams.cap_info+1) & WME_QOSINFO_COUNT;
1289 ieee80211_beacon_notify(vap, IEEE80211_BEACON_WME);
1290 }
1291
1292 /* schedule the deferred WME update */
1293 ieee80211_runtask(ic, &vap->iv_wme_task);
1294
1295 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1296 "%s: WME params updated, cap_info 0x%x\n", __func__,
1297 vap->iv_opmode == IEEE80211_M_STA ?
1298 wme->wme_wmeChanParams.cap_info :
1299 wme->wme_bssChanParams.cap_info);
1300 }
1301
1302 void
ieee80211_wme_updateparams(struct ieee80211vap * vap)1303 ieee80211_wme_updateparams(struct ieee80211vap *vap)
1304 {
1305 struct ieee80211com *ic = vap->iv_ic;
1306
1307 if (ic->ic_caps & IEEE80211_C_WME) {
1308 IEEE80211_LOCK(ic);
1309 ieee80211_wme_updateparams_locked(vap);
1310 IEEE80211_UNLOCK(ic);
1311 }
1312 }
1313
1314 /*
1315 * Fetch the WME parameters for the given VAP.
1316 *
1317 * When net80211 grows p2p, etc support, this may return different
1318 * parameters for each VAP.
1319 */
1320 void
ieee80211_wme_vap_getparams(struct ieee80211vap * vap,struct chanAccParams * wp)1321 ieee80211_wme_vap_getparams(struct ieee80211vap *vap, struct chanAccParams *wp)
1322 {
1323
1324 memcpy(wp, &vap->iv_ic->ic_wme.wme_chanParams, sizeof(*wp));
1325 }
1326
1327 /*
1328 * For NICs which only support one set of WME paramaters (ie, softmac NICs)
1329 * there may be different VAP WME parameters but only one is "active".
1330 * This returns the "NIC" WME parameters for the currently active
1331 * context.
1332 */
1333 void
ieee80211_wme_ic_getparams(struct ieee80211com * ic,struct chanAccParams * wp)1334 ieee80211_wme_ic_getparams(struct ieee80211com *ic, struct chanAccParams *wp)
1335 {
1336
1337 memcpy(wp, &ic->ic_wme.wme_chanParams, sizeof(*wp));
1338 }
1339
1340 /*
1341 * Return whether to use QoS on a given WME queue.
1342 *
1343 * This is intended to be called from the transmit path of softmac drivers
1344 * which are setting NoAck bits in transmit descriptors.
1345 *
1346 * Ideally this would be set in some transmit field before the packet is
1347 * queued to the driver but net80211 isn't quite there yet.
1348 */
1349 int
ieee80211_wme_vap_ac_is_noack(struct ieee80211vap * vap,int ac)1350 ieee80211_wme_vap_ac_is_noack(struct ieee80211vap *vap, int ac)
1351 {
1352 /* Bounds/sanity check */
1353 if (ac < 0 || ac >= WME_NUM_AC)
1354 return (0);
1355
1356 /* Again, there's only one global context for now */
1357 return (!! vap->iv_ic->ic_wme.wme_chanParams.cap_wmeParams[ac].wmep_noackPolicy);
1358 }
1359
1360 static void
parent_updown(void * arg,int npending)1361 parent_updown(void *arg, int npending)
1362 {
1363 struct ieee80211com *ic = arg;
1364
1365 ic->ic_parent(ic);
1366 }
1367
1368 static void
update_mcast(void * arg,int npending)1369 update_mcast(void *arg, int npending)
1370 {
1371 struct ieee80211com *ic = arg;
1372
1373 ic->ic_update_mcast(ic);
1374 }
1375
1376 static void
update_promisc(void * arg,int npending)1377 update_promisc(void *arg, int npending)
1378 {
1379 struct ieee80211com *ic = arg;
1380
1381 ic->ic_update_promisc(ic);
1382 }
1383
1384 static void
update_channel(void * arg,int npending)1385 update_channel(void *arg, int npending)
1386 {
1387 struct ieee80211com *ic = arg;
1388
1389 ic->ic_set_channel(ic);
1390 ieee80211_radiotap_chan_change(ic);
1391 }
1392
1393 static void
update_chw(void * arg,int npending)1394 update_chw(void *arg, int npending)
1395 {
1396 struct ieee80211com *ic = arg;
1397
1398 /*
1399 * XXX should we defer the channel width _config_ update until now?
1400 */
1401 ic->ic_update_chw(ic);
1402 }
1403
1404 /*
1405 * Deferred WME update.
1406 *
1407 * In preparation for per-VAP WME configuration, call the VAP
1408 * method if the VAP requires it. Otherwise, just call the
1409 * older global method. There isn't a per-VAP WME configuration
1410 * just yet so for now just use the global configuration.
1411 */
1412 static void
vap_update_wme(void * arg,int npending)1413 vap_update_wme(void *arg, int npending)
1414 {
1415 struct ieee80211vap *vap = arg;
1416 struct ieee80211com *ic = vap->iv_ic;
1417
1418 if (vap->iv_wme_update != NULL)
1419 vap->iv_wme_update(vap,
1420 ic->ic_wme.wme_chanParams.cap_wmeParams);
1421 else
1422 ic->ic_wme.wme_update(ic);
1423 }
1424
1425 static void
restart_vaps(void * arg,int npending)1426 restart_vaps(void *arg, int npending)
1427 {
1428 struct ieee80211com *ic = arg;
1429
1430 ieee80211_suspend_all(ic);
1431 ieee80211_resume_all(ic);
1432 }
1433
1434 /*
1435 * Block until the parent is in a known state. This is
1436 * used after any operations that dispatch a task (e.g.
1437 * to auto-configure the parent device up/down).
1438 */
1439 void
ieee80211_waitfor_parent(struct ieee80211com * ic)1440 ieee80211_waitfor_parent(struct ieee80211com *ic)
1441 {
1442 taskqueue_block(ic->ic_tq);
1443 ieee80211_draintask(ic, &ic->ic_parent_task);
1444 ieee80211_draintask(ic, &ic->ic_mcast_task);
1445 ieee80211_draintask(ic, &ic->ic_promisc_task);
1446 ieee80211_draintask(ic, &ic->ic_chan_task);
1447 ieee80211_draintask(ic, &ic->ic_bmiss_task);
1448 ieee80211_draintask(ic, &ic->ic_chw_task);
1449 taskqueue_unblock(ic->ic_tq);
1450 }
1451
1452 /*
1453 * Check to see whether the current channel needs reset.
1454 *
1455 * Some devices don't handle being given an invalid channel
1456 * in their operating mode very well (eg wpi(4) will throw a
1457 * firmware exception.)
1458 *
1459 * Return 0 if we're ok, 1 if the channel needs to be reset.
1460 *
1461 * See PR kern/202502.
1462 */
1463 static int
ieee80211_start_check_reset_chan(struct ieee80211vap * vap)1464 ieee80211_start_check_reset_chan(struct ieee80211vap *vap)
1465 {
1466 struct ieee80211com *ic = vap->iv_ic;
1467
1468 if ((vap->iv_opmode == IEEE80211_M_IBSS &&
1469 IEEE80211_IS_CHAN_NOADHOC(ic->ic_curchan)) ||
1470 (vap->iv_opmode == IEEE80211_M_HOSTAP &&
1471 IEEE80211_IS_CHAN_NOHOSTAP(ic->ic_curchan)))
1472 return (1);
1473 return (0);
1474 }
1475
1476 /*
1477 * Reset the curchan to a known good state.
1478 */
1479 static void
ieee80211_start_reset_chan(struct ieee80211vap * vap)1480 ieee80211_start_reset_chan(struct ieee80211vap *vap)
1481 {
1482 struct ieee80211com *ic = vap->iv_ic;
1483
1484 ic->ic_curchan = &ic->ic_channels[0];
1485 }
1486
1487 /*
1488 * Start a vap running. If this is the first vap to be
1489 * set running on the underlying device then we
1490 * automatically bring the device up.
1491 */
1492 void
ieee80211_start_locked(struct ieee80211vap * vap)1493 ieee80211_start_locked(struct ieee80211vap *vap)
1494 {
1495 struct ifnet *ifp = vap->iv_ifp;
1496 struct ieee80211com *ic = vap->iv_ic;
1497
1498 IEEE80211_LOCK_ASSERT(ic);
1499
1500 IEEE80211_DPRINTF(vap,
1501 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1502 "start running, %d vaps running\n", ic->ic_nrunning);
1503
1504 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
1505 /*
1506 * Mark us running. Note that it's ok to do this first;
1507 * if we need to bring the parent device up we defer that
1508 * to avoid dropping the com lock. We expect the device
1509 * to respond to being marked up by calling back into us
1510 * through ieee80211_start_all at which point we'll come
1511 * back in here and complete the work.
1512 */
1513 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1514 /*
1515 * We are not running; if this we are the first vap
1516 * to be brought up auto-up the parent if necessary.
1517 */
1518 if (ic->ic_nrunning++ == 0) {
1519
1520 /* reset the channel to a known good channel */
1521 if (ieee80211_start_check_reset_chan(vap))
1522 ieee80211_start_reset_chan(vap);
1523
1524 IEEE80211_DPRINTF(vap,
1525 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1526 "%s: up parent %s\n", __func__, ic->ic_name);
1527 ieee80211_runtask(ic, &ic->ic_parent_task);
1528 return;
1529 }
1530 }
1531 /*
1532 * If the parent is up and running, then kick the
1533 * 802.11 state machine as appropriate.
1534 */
1535 if (vap->iv_roaming != IEEE80211_ROAMING_MANUAL) {
1536 if (vap->iv_opmode == IEEE80211_M_STA) {
1537 #if 0
1538 /* XXX bypasses scan too easily; disable for now */
1539 /*
1540 * Try to be intelligent about clocking the state
1541 * machine. If we're currently in RUN state then
1542 * we should be able to apply any new state/parameters
1543 * simply by re-associating. Otherwise we need to
1544 * re-scan to select an appropriate ap.
1545 */
1546 if (vap->iv_state >= IEEE80211_S_RUN)
1547 ieee80211_new_state_locked(vap,
1548 IEEE80211_S_ASSOC, 1);
1549 else
1550 #endif
1551 ieee80211_new_state_locked(vap,
1552 IEEE80211_S_SCAN, 0);
1553 } else {
1554 /*
1555 * For monitor+wds mode there's nothing to do but
1556 * start running. Otherwise if this is the first
1557 * vap to be brought up, start a scan which may be
1558 * preempted if the station is locked to a particular
1559 * channel.
1560 */
1561 vap->iv_flags_ext |= IEEE80211_FEXT_REINIT;
1562 if (vap->iv_opmode == IEEE80211_M_MONITOR ||
1563 vap->iv_opmode == IEEE80211_M_WDS)
1564 ieee80211_new_state_locked(vap,
1565 IEEE80211_S_RUN, -1);
1566 else
1567 ieee80211_new_state_locked(vap,
1568 IEEE80211_S_SCAN, 0);
1569 }
1570 }
1571 }
1572
1573 /*
1574 * Start a single vap.
1575 */
1576 void
ieee80211_init(void * arg)1577 ieee80211_init(void *arg)
1578 {
1579 struct ieee80211vap *vap = arg;
1580
1581 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1582 "%s\n", __func__);
1583
1584 IEEE80211_LOCK(vap->iv_ic);
1585 ieee80211_start_locked(vap);
1586 IEEE80211_UNLOCK(vap->iv_ic);
1587 }
1588
1589 /*
1590 * Start all runnable vap's on a device.
1591 */
1592 void
ieee80211_start_all(struct ieee80211com * ic)1593 ieee80211_start_all(struct ieee80211com *ic)
1594 {
1595 struct ieee80211vap *vap;
1596
1597 IEEE80211_LOCK(ic);
1598 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1599 struct ifnet *ifp = vap->iv_ifp;
1600 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */
1601 ieee80211_start_locked(vap);
1602 }
1603 IEEE80211_UNLOCK(ic);
1604 }
1605
1606 /*
1607 * Stop a vap. We force it down using the state machine
1608 * then mark it's ifnet not running. If this is the last
1609 * vap running on the underlying device then we close it
1610 * too to insure it will be properly initialized when the
1611 * next vap is brought up.
1612 */
1613 void
ieee80211_stop_locked(struct ieee80211vap * vap)1614 ieee80211_stop_locked(struct ieee80211vap *vap)
1615 {
1616 struct ieee80211com *ic = vap->iv_ic;
1617 struct ifnet *ifp = vap->iv_ifp;
1618
1619 IEEE80211_LOCK_ASSERT(ic);
1620
1621 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1622 "stop running, %d vaps running\n", ic->ic_nrunning);
1623
1624 ieee80211_new_state_locked(vap, IEEE80211_S_INIT, -1);
1625 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
1626 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; /* mark us stopped */
1627 if (--ic->ic_nrunning == 0) {
1628 IEEE80211_DPRINTF(vap,
1629 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1630 "down parent %s\n", ic->ic_name);
1631 ieee80211_runtask(ic, &ic->ic_parent_task);
1632 }
1633 }
1634 }
1635
1636 void
ieee80211_stop(struct ieee80211vap * vap)1637 ieee80211_stop(struct ieee80211vap *vap)
1638 {
1639 struct ieee80211com *ic = vap->iv_ic;
1640
1641 IEEE80211_LOCK(ic);
1642 ieee80211_stop_locked(vap);
1643 IEEE80211_UNLOCK(ic);
1644 }
1645
1646 /*
1647 * Stop all vap's running on a device.
1648 */
1649 void
ieee80211_stop_all(struct ieee80211com * ic)1650 ieee80211_stop_all(struct ieee80211com *ic)
1651 {
1652 struct ieee80211vap *vap;
1653
1654 IEEE80211_LOCK(ic);
1655 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1656 struct ifnet *ifp = vap->iv_ifp;
1657 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */
1658 ieee80211_stop_locked(vap);
1659 }
1660 IEEE80211_UNLOCK(ic);
1661
1662 ieee80211_waitfor_parent(ic);
1663 }
1664
1665 /*
1666 * Stop all vap's running on a device and arrange
1667 * for those that were running to be resumed.
1668 */
1669 void
ieee80211_suspend_all(struct ieee80211com * ic)1670 ieee80211_suspend_all(struct ieee80211com *ic)
1671 {
1672 struct ieee80211vap *vap;
1673
1674 IEEE80211_LOCK(ic);
1675 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1676 struct ifnet *ifp = vap->iv_ifp;
1677 if (IFNET_IS_UP_RUNNING(ifp)) { /* NB: avoid recursion */
1678 vap->iv_flags_ext |= IEEE80211_FEXT_RESUME;
1679 ieee80211_stop_locked(vap);
1680 }
1681 }
1682 IEEE80211_UNLOCK(ic);
1683
1684 ieee80211_waitfor_parent(ic);
1685 }
1686
1687 /*
1688 * Start all vap's marked for resume.
1689 */
1690 void
ieee80211_resume_all(struct ieee80211com * ic)1691 ieee80211_resume_all(struct ieee80211com *ic)
1692 {
1693 struct ieee80211vap *vap;
1694
1695 IEEE80211_LOCK(ic);
1696 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1697 struct ifnet *ifp = vap->iv_ifp;
1698 if (!IFNET_IS_UP_RUNNING(ifp) &&
1699 (vap->iv_flags_ext & IEEE80211_FEXT_RESUME)) {
1700 vap->iv_flags_ext &= ~IEEE80211_FEXT_RESUME;
1701 ieee80211_start_locked(vap);
1702 }
1703 }
1704 IEEE80211_UNLOCK(ic);
1705 }
1706
1707 /*
1708 * Restart all vap's running on a device.
1709 */
1710 void
ieee80211_restart_all(struct ieee80211com * ic)1711 ieee80211_restart_all(struct ieee80211com *ic)
1712 {
1713 /*
1714 * NB: do not use ieee80211_runtask here, we will
1715 * block & drain net80211 taskqueue.
1716 */
1717 taskqueue_enqueue(taskqueue_thread, &ic->ic_restart_task);
1718 }
1719
1720 void
ieee80211_beacon_miss(struct ieee80211com * ic)1721 ieee80211_beacon_miss(struct ieee80211com *ic)
1722 {
1723 IEEE80211_LOCK(ic);
1724 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1725 /* Process in a taskq, the handler may reenter the driver */
1726 ieee80211_runtask(ic, &ic->ic_bmiss_task);
1727 }
1728 IEEE80211_UNLOCK(ic);
1729 }
1730
1731 static void
beacon_miss(void * arg,int npending)1732 beacon_miss(void *arg, int npending)
1733 {
1734 struct ieee80211com *ic = arg;
1735 struct ieee80211vap *vap;
1736
1737 IEEE80211_LOCK(ic);
1738 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1739 /*
1740 * We only pass events through for sta vap's in RUN+ state;
1741 * may be too restrictive but for now this saves all the
1742 * handlers duplicating these checks.
1743 */
1744 if (vap->iv_opmode == IEEE80211_M_STA &&
1745 vap->iv_state >= IEEE80211_S_RUN &&
1746 vap->iv_bmiss != NULL)
1747 vap->iv_bmiss(vap);
1748 }
1749 IEEE80211_UNLOCK(ic);
1750 }
1751
1752 static void
beacon_swmiss(void * arg,int npending)1753 beacon_swmiss(void *arg, int npending)
1754 {
1755 struct ieee80211vap *vap = arg;
1756 struct ieee80211com *ic = vap->iv_ic;
1757
1758 IEEE80211_LOCK(ic);
1759 if (vap->iv_state >= IEEE80211_S_RUN) {
1760 /* XXX Call multiple times if npending > zero? */
1761 vap->iv_bmiss(vap);
1762 }
1763 IEEE80211_UNLOCK(ic);
1764 }
1765
1766 /*
1767 * Software beacon miss handling. Check if any beacons
1768 * were received in the last period. If not post a
1769 * beacon miss; otherwise reset the counter.
1770 */
1771 void
ieee80211_swbmiss(void * arg)1772 ieee80211_swbmiss(void *arg)
1773 {
1774 struct ieee80211vap *vap = arg;
1775 struct ieee80211com *ic = vap->iv_ic;
1776
1777 IEEE80211_LOCK_ASSERT(ic);
1778
1779 KASSERT(vap->iv_state >= IEEE80211_S_RUN,
1780 ("wrong state %d", vap->iv_state));
1781
1782 if (ic->ic_flags & IEEE80211_F_SCAN) {
1783 /*
1784 * If scanning just ignore and reset state. If we get a
1785 * bmiss after coming out of scan because we haven't had
1786 * time to receive a beacon then we should probe the AP
1787 * before posting a real bmiss (unless iv_bmiss_max has
1788 * been artifiically lowered). A cleaner solution might
1789 * be to disable the timer on scan start/end but to handle
1790 * case of multiple sta vap's we'd need to disable the
1791 * timers of all affected vap's.
1792 */
1793 vap->iv_swbmiss_count = 0;
1794 } else if (vap->iv_swbmiss_count == 0) {
1795 if (vap->iv_bmiss != NULL)
1796 ieee80211_runtask(ic, &vap->iv_swbmiss_task);
1797 } else
1798 vap->iv_swbmiss_count = 0;
1799 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period,
1800 ieee80211_swbmiss, vap);
1801 }
1802
1803 /*
1804 * Start an 802.11h channel switch. We record the parameters,
1805 * mark the operation pending, notify each vap through the
1806 * beacon update mechanism so it can update the beacon frame
1807 * contents, and then switch vap's to CSA state to block outbound
1808 * traffic. Devices that handle CSA directly can use the state
1809 * switch to do the right thing so long as they call
1810 * ieee80211_csa_completeswitch when it's time to complete the
1811 * channel change. Devices that depend on the net80211 layer can
1812 * use ieee80211_beacon_update to handle the countdown and the
1813 * channel switch.
1814 */
1815 void
ieee80211_csa_startswitch(struct ieee80211com * ic,struct ieee80211_channel * c,int mode,int count)1816 ieee80211_csa_startswitch(struct ieee80211com *ic,
1817 struct ieee80211_channel *c, int mode, int count)
1818 {
1819 struct ieee80211vap *vap;
1820
1821 IEEE80211_LOCK_ASSERT(ic);
1822
1823 ic->ic_csa_newchan = c;
1824 ic->ic_csa_mode = mode;
1825 ic->ic_csa_count = count;
1826 ic->ic_flags |= IEEE80211_F_CSAPENDING;
1827 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1828 if (vap->iv_opmode == IEEE80211_M_HOSTAP ||
1829 vap->iv_opmode == IEEE80211_M_IBSS ||
1830 vap->iv_opmode == IEEE80211_M_MBSS)
1831 ieee80211_beacon_notify(vap, IEEE80211_BEACON_CSA);
1832 /* switch to CSA state to block outbound traffic */
1833 if (vap->iv_state == IEEE80211_S_RUN)
1834 ieee80211_new_state_locked(vap, IEEE80211_S_CSA, 0);
1835 }
1836 ieee80211_notify_csa(ic, c, mode, count);
1837 }
1838
1839 /*
1840 * Complete the channel switch by transitioning all CSA VAPs to RUN.
1841 * This is called by both the completion and cancellation functions
1842 * so each VAP is placed back in the RUN state and can thus transmit.
1843 */
1844 static void
csa_completeswitch(struct ieee80211com * ic)1845 csa_completeswitch(struct ieee80211com *ic)
1846 {
1847 struct ieee80211vap *vap;
1848
1849 ic->ic_csa_newchan = NULL;
1850 ic->ic_flags &= ~IEEE80211_F_CSAPENDING;
1851
1852 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1853 if (vap->iv_state == IEEE80211_S_CSA)
1854 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0);
1855 }
1856
1857 /*
1858 * Complete an 802.11h channel switch started by ieee80211_csa_startswitch.
1859 * We clear state and move all vap's in CSA state to RUN state
1860 * so they can again transmit.
1861 *
1862 * Although this may not be completely correct, update the BSS channel
1863 * for each VAP to the newly configured channel. The setcurchan sets
1864 * the current operating channel for the interface (so the radio does
1865 * switch over) but the VAP BSS isn't updated, leading to incorrectly
1866 * reported information via ioctl.
1867 */
1868 void
ieee80211_csa_completeswitch(struct ieee80211com * ic)1869 ieee80211_csa_completeswitch(struct ieee80211com *ic)
1870 {
1871 struct ieee80211vap *vap;
1872
1873 IEEE80211_LOCK_ASSERT(ic);
1874
1875 KASSERT(ic->ic_flags & IEEE80211_F_CSAPENDING, ("csa not pending"));
1876
1877 ieee80211_setcurchan(ic, ic->ic_csa_newchan);
1878 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1879 if (vap->iv_state == IEEE80211_S_CSA)
1880 vap->iv_bss->ni_chan = ic->ic_curchan;
1881
1882 csa_completeswitch(ic);
1883 }
1884
1885 /*
1886 * Cancel an 802.11h channel switch started by ieee80211_csa_startswitch.
1887 * We clear state and move all vap's in CSA state to RUN state
1888 * so they can again transmit.
1889 */
1890 void
ieee80211_csa_cancelswitch(struct ieee80211com * ic)1891 ieee80211_csa_cancelswitch(struct ieee80211com *ic)
1892 {
1893 IEEE80211_LOCK_ASSERT(ic);
1894
1895 csa_completeswitch(ic);
1896 }
1897
1898 /*
1899 * Complete a DFS CAC started by ieee80211_dfs_cac_start.
1900 * We clear state and move all vap's in CAC state to RUN state.
1901 */
1902 void
ieee80211_cac_completeswitch(struct ieee80211vap * vap0)1903 ieee80211_cac_completeswitch(struct ieee80211vap *vap0)
1904 {
1905 struct ieee80211com *ic = vap0->iv_ic;
1906 struct ieee80211vap *vap;
1907
1908 IEEE80211_LOCK(ic);
1909 /*
1910 * Complete CAC state change for lead vap first; then
1911 * clock all the other vap's waiting.
1912 */
1913 KASSERT(vap0->iv_state == IEEE80211_S_CAC,
1914 ("wrong state %d", vap0->iv_state));
1915 ieee80211_new_state_locked(vap0, IEEE80211_S_RUN, 0);
1916
1917 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1918 if (vap->iv_state == IEEE80211_S_CAC && vap != vap0)
1919 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0);
1920 IEEE80211_UNLOCK(ic);
1921 }
1922
1923 /*
1924 * Force all vap's other than the specified vap to the INIT state
1925 * and mark them as waiting for a scan to complete. These vaps
1926 * will be brought up when the scan completes and the scanning vap
1927 * reaches RUN state by wakeupwaiting.
1928 */
1929 static void
markwaiting(struct ieee80211vap * vap0)1930 markwaiting(struct ieee80211vap *vap0)
1931 {
1932 struct ieee80211com *ic = vap0->iv_ic;
1933 struct ieee80211vap *vap;
1934
1935 IEEE80211_LOCK_ASSERT(ic);
1936
1937 /*
1938 * A vap list entry can not disappear since we are running on the
1939 * taskqueue and a vap destroy will queue and drain another state
1940 * change task.
1941 */
1942 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1943 if (vap == vap0)
1944 continue;
1945 if (vap->iv_state != IEEE80211_S_INIT) {
1946 /* NB: iv_newstate may drop the lock */
1947 vap->iv_newstate(vap, IEEE80211_S_INIT, 0);
1948 IEEE80211_LOCK_ASSERT(ic);
1949 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT;
1950 }
1951 }
1952 }
1953
1954 /*
1955 * Wakeup all vap's waiting for a scan to complete. This is the
1956 * companion to markwaiting (above) and is used to coordinate
1957 * multiple vaps scanning.
1958 * This is called from the state taskqueue.
1959 */
1960 static void
wakeupwaiting(struct ieee80211vap * vap0)1961 wakeupwaiting(struct ieee80211vap *vap0)
1962 {
1963 struct ieee80211com *ic = vap0->iv_ic;
1964 struct ieee80211vap *vap;
1965
1966 IEEE80211_LOCK_ASSERT(ic);
1967
1968 /*
1969 * A vap list entry can not disappear since we are running on the
1970 * taskqueue and a vap destroy will queue and drain another state
1971 * change task.
1972 */
1973 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1974 if (vap == vap0)
1975 continue;
1976 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANWAIT) {
1977 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT;
1978 /* NB: sta's cannot go INIT->RUN */
1979 /* NB: iv_newstate may drop the lock */
1980 vap->iv_newstate(vap,
1981 vap->iv_opmode == IEEE80211_M_STA ?
1982 IEEE80211_S_SCAN : IEEE80211_S_RUN, 0);
1983 IEEE80211_LOCK_ASSERT(ic);
1984 }
1985 }
1986 }
1987
1988 /*
1989 * Handle post state change work common to all operating modes.
1990 */
1991 static void
ieee80211_newstate_cb(void * xvap,int npending)1992 ieee80211_newstate_cb(void *xvap, int npending)
1993 {
1994 struct ieee80211vap *vap = xvap;
1995 struct ieee80211com *ic = vap->iv_ic;
1996 enum ieee80211_state nstate, ostate;
1997 int arg, rc;
1998
1999 IEEE80211_LOCK(ic);
2000 nstate = vap->iv_nstate;
2001 arg = vap->iv_nstate_arg;
2002
2003 if (vap->iv_flags_ext & IEEE80211_FEXT_REINIT) {
2004 /*
2005 * We have been requested to drop back to the INIT before
2006 * proceeding to the new state.
2007 */
2008 /* Deny any state changes while we are here. */
2009 vap->iv_nstate = IEEE80211_S_INIT;
2010 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2011 "%s: %s -> %s arg %d\n", __func__,
2012 ieee80211_state_name[vap->iv_state],
2013 ieee80211_state_name[vap->iv_nstate], arg);
2014 vap->iv_newstate(vap, vap->iv_nstate, 0);
2015 IEEE80211_LOCK_ASSERT(ic);
2016 vap->iv_flags_ext &= ~(IEEE80211_FEXT_REINIT |
2017 IEEE80211_FEXT_STATEWAIT);
2018 /* enqueue new state transition after cancel_scan() task */
2019 ieee80211_new_state_locked(vap, nstate, arg);
2020 goto done;
2021 }
2022
2023 ostate = vap->iv_state;
2024 if (nstate == IEEE80211_S_SCAN && ostate != IEEE80211_S_INIT) {
2025 /*
2026 * SCAN was forced; e.g. on beacon miss. Force other running
2027 * vap's to INIT state and mark them as waiting for the scan to
2028 * complete. This insures they don't interfere with our
2029 * scanning. Since we are single threaded the vaps can not
2030 * transition again while we are executing.
2031 *
2032 * XXX not always right, assumes ap follows sta
2033 */
2034 markwaiting(vap);
2035 }
2036 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2037 "%s: %s -> %s arg %d\n", __func__,
2038 ieee80211_state_name[ostate], ieee80211_state_name[nstate], arg);
2039
2040 rc = vap->iv_newstate(vap, nstate, arg);
2041 IEEE80211_LOCK_ASSERT(ic);
2042 vap->iv_flags_ext &= ~IEEE80211_FEXT_STATEWAIT;
2043 if (rc != 0) {
2044 /* State transition failed */
2045 KASSERT(rc != EINPROGRESS, ("iv_newstate was deferred"));
2046 KASSERT(nstate != IEEE80211_S_INIT,
2047 ("INIT state change failed"));
2048 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2049 "%s: %s returned error %d\n", __func__,
2050 ieee80211_state_name[nstate], rc);
2051 goto done;
2052 }
2053
2054 /* No actual transition, skip post processing */
2055 if (ostate == nstate)
2056 goto done;
2057
2058 if (nstate == IEEE80211_S_RUN) {
2059 /*
2060 * OACTIVE may be set on the vap if the upper layer
2061 * tried to transmit (e.g. IPv6 NDP) before we reach
2062 * RUN state. Clear it and restart xmit.
2063 *
2064 * Note this can also happen as a result of SLEEP->RUN
2065 * (i.e. coming out of power save mode).
2066 */
2067 vap->iv_ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
2068
2069 /*
2070 * XXX TODO Kick-start a VAP queue - this should be a method!
2071 */
2072
2073 /* bring up any vaps waiting on us */
2074 wakeupwaiting(vap);
2075 } else if (nstate == IEEE80211_S_INIT) {
2076 /*
2077 * Flush the scan cache if we did the last scan (XXX?)
2078 * and flush any frames on send queues from this vap.
2079 * Note the mgt q is used only for legacy drivers and
2080 * will go away shortly.
2081 */
2082 ieee80211_scan_flush(vap);
2083
2084 /*
2085 * XXX TODO: ic/vap queue flush
2086 */
2087 }
2088 done:
2089 IEEE80211_UNLOCK(ic);
2090 }
2091
2092 /*
2093 * Public interface for initiating a state machine change.
2094 * This routine single-threads the request and coordinates
2095 * the scheduling of multiple vaps for the purpose of selecting
2096 * an operating channel. Specifically the following scenarios
2097 * are handled:
2098 * o only one vap can be selecting a channel so on transition to
2099 * SCAN state if another vap is already scanning then
2100 * mark the caller for later processing and return without
2101 * doing anything (XXX? expectations by caller of synchronous operation)
2102 * o only one vap can be doing CAC of a channel so on transition to
2103 * CAC state if another vap is already scanning for radar then
2104 * mark the caller for later processing and return without
2105 * doing anything (XXX? expectations by caller of synchronous operation)
2106 * o if another vap is already running when a request is made
2107 * to SCAN then an operating channel has been chosen; bypass
2108 * the scan and just join the channel
2109 *
2110 * Note that the state change call is done through the iv_newstate
2111 * method pointer so any driver routine gets invoked. The driver
2112 * will normally call back into operating mode-specific
2113 * ieee80211_newstate routines (below) unless it needs to completely
2114 * bypass the state machine (e.g. because the firmware has it's
2115 * own idea how things should work). Bypassing the net80211 layer
2116 * is usually a mistake and indicates lack of proper integration
2117 * with the net80211 layer.
2118 */
2119 int
ieee80211_new_state_locked(struct ieee80211vap * vap,enum ieee80211_state nstate,int arg)2120 ieee80211_new_state_locked(struct ieee80211vap *vap,
2121 enum ieee80211_state nstate, int arg)
2122 {
2123 struct ieee80211com *ic = vap->iv_ic;
2124 struct ieee80211vap *vp;
2125 enum ieee80211_state ostate;
2126 int nrunning, nscanning;
2127
2128 IEEE80211_LOCK_ASSERT(ic);
2129
2130 if (vap->iv_flags_ext & IEEE80211_FEXT_STATEWAIT) {
2131 if (vap->iv_nstate == IEEE80211_S_INIT ||
2132 ((vap->iv_state == IEEE80211_S_INIT ||
2133 (vap->iv_flags_ext & IEEE80211_FEXT_REINIT)) &&
2134 vap->iv_nstate == IEEE80211_S_SCAN &&
2135 nstate > IEEE80211_S_SCAN)) {
2136 /*
2137 * XXX The vap is being stopped/started,
2138 * do not allow any other state changes
2139 * until this is completed.
2140 */
2141 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2142 "%s: %s -> %s (%s) transition discarded\n",
2143 __func__,
2144 ieee80211_state_name[vap->iv_state],
2145 ieee80211_state_name[nstate],
2146 ieee80211_state_name[vap->iv_nstate]);
2147 return -1;
2148 } else if (vap->iv_state != vap->iv_nstate) {
2149 #if 0
2150 /* Warn if the previous state hasn't completed. */
2151 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2152 "%s: pending %s -> %s transition lost\n", __func__,
2153 ieee80211_state_name[vap->iv_state],
2154 ieee80211_state_name[vap->iv_nstate]);
2155 #else
2156 /* XXX temporarily enable to identify issues */
2157 if_printf(vap->iv_ifp,
2158 "%s: pending %s -> %s transition lost\n",
2159 __func__, ieee80211_state_name[vap->iv_state],
2160 ieee80211_state_name[vap->iv_nstate]);
2161 #endif
2162 }
2163 }
2164
2165 nrunning = nscanning = 0;
2166 /* XXX can track this state instead of calculating */
2167 TAILQ_FOREACH(vp, &ic->ic_vaps, iv_next) {
2168 if (vp != vap) {
2169 if (vp->iv_state >= IEEE80211_S_RUN)
2170 nrunning++;
2171 /* XXX doesn't handle bg scan */
2172 /* NB: CAC+AUTH+ASSOC treated like SCAN */
2173 else if (vp->iv_state > IEEE80211_S_INIT)
2174 nscanning++;
2175 }
2176 }
2177 ostate = vap->iv_state;
2178 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2179 "%s: %s -> %s (nrunning %d nscanning %d)\n", __func__,
2180 ieee80211_state_name[ostate], ieee80211_state_name[nstate],
2181 nrunning, nscanning);
2182 switch (nstate) {
2183 case IEEE80211_S_SCAN:
2184 if (ostate == IEEE80211_S_INIT) {
2185 /*
2186 * INIT -> SCAN happens on initial bringup.
2187 */
2188 KASSERT(!(nscanning && nrunning),
2189 ("%d scanning and %d running", nscanning, nrunning));
2190 if (nscanning) {
2191 /*
2192 * Someone is scanning, defer our state
2193 * change until the work has completed.
2194 */
2195 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2196 "%s: defer %s -> %s\n",
2197 __func__, ieee80211_state_name[ostate],
2198 ieee80211_state_name[nstate]);
2199 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT;
2200 return 0;
2201 }
2202 if (nrunning) {
2203 /*
2204 * Someone is operating; just join the channel
2205 * they have chosen.
2206 */
2207 /* XXX kill arg? */
2208 /* XXX check each opmode, adhoc? */
2209 if (vap->iv_opmode == IEEE80211_M_STA)
2210 nstate = IEEE80211_S_SCAN;
2211 else
2212 nstate = IEEE80211_S_RUN;
2213 #ifdef IEEE80211_DEBUG
2214 if (nstate != IEEE80211_S_SCAN) {
2215 IEEE80211_DPRINTF(vap,
2216 IEEE80211_MSG_STATE,
2217 "%s: override, now %s -> %s\n",
2218 __func__,
2219 ieee80211_state_name[ostate],
2220 ieee80211_state_name[nstate]);
2221 }
2222 #endif
2223 }
2224 }
2225 break;
2226 case IEEE80211_S_RUN:
2227 if (vap->iv_opmode == IEEE80211_M_WDS &&
2228 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) &&
2229 nscanning) {
2230 /*
2231 * Legacy WDS with someone else scanning; don't
2232 * go online until that completes as we should
2233 * follow the other vap to the channel they choose.
2234 */
2235 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2236 "%s: defer %s -> %s (legacy WDS)\n", __func__,
2237 ieee80211_state_name[ostate],
2238 ieee80211_state_name[nstate]);
2239 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT;
2240 return 0;
2241 }
2242 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
2243 IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) &&
2244 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) &&
2245 !IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) {
2246 /*
2247 * This is a DFS channel, transition to CAC state
2248 * instead of RUN. This allows us to initiate
2249 * Channel Availability Check (CAC) as specified
2250 * by 11h/DFS.
2251 */
2252 nstate = IEEE80211_S_CAC;
2253 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2254 "%s: override %s -> %s (DFS)\n", __func__,
2255 ieee80211_state_name[ostate],
2256 ieee80211_state_name[nstate]);
2257 }
2258 break;
2259 case IEEE80211_S_INIT:
2260 /* cancel any scan in progress */
2261 ieee80211_cancel_scan(vap);
2262 if (ostate == IEEE80211_S_INIT ) {
2263 /* XXX don't believe this */
2264 /* INIT -> INIT. nothing to do */
2265 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT;
2266 }
2267 /* fall thru... */
2268 default:
2269 break;
2270 }
2271 /* defer the state change to a thread */
2272 vap->iv_nstate = nstate;
2273 vap->iv_nstate_arg = arg;
2274 vap->iv_flags_ext |= IEEE80211_FEXT_STATEWAIT;
2275 ieee80211_runtask(ic, &vap->iv_nstate_task);
2276 return EINPROGRESS;
2277 }
2278
2279 int
ieee80211_new_state(struct ieee80211vap * vap,enum ieee80211_state nstate,int arg)2280 ieee80211_new_state(struct ieee80211vap *vap,
2281 enum ieee80211_state nstate, int arg)
2282 {
2283 struct ieee80211com *ic = vap->iv_ic;
2284 int rc;
2285
2286 IEEE80211_LOCK(ic);
2287 rc = ieee80211_new_state_locked(vap, nstate, arg);
2288 IEEE80211_UNLOCK(ic);
2289 return rc;
2290 }
2291