2 * Copyright (c) 2001 Atsushi Onoe
3 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
31 * IEEE 802.11 protocol support.
37 #include <sys/param.h>
38 #include <sys/kernel.h>
39 #include <sys/systm.h>
41 #include <sys/socket.h>
42 #include <sys/sockio.h>
45 #include <net/if_var.h>
46 #include <net/if_media.h>
47 #include <net/ethernet.h> /* XXX for ether_sprintf */
49 #include <net80211/ieee80211_var.h>
50 #include <net80211/ieee80211_adhoc.h>
51 #include <net80211/ieee80211_sta.h>
52 #include <net80211/ieee80211_hostap.h>
53 #include <net80211/ieee80211_wds.h>
54 #ifdef IEEE80211_SUPPORT_MESH
55 #include <net80211/ieee80211_mesh.h>
57 #include <net80211/ieee80211_monitor.h>
58 #include <net80211/ieee80211_input.h>
61 #define AGGRESSIVE_MODE_SWITCH_HYSTERESIS 3 /* pkts / 100ms */
62 #define HIGH_PRI_SWITCH_THRESH 10 /* pkts / 100ms */
64 const char *ieee80211_mgt_subtype_name[] = {
65 "assoc_req", "assoc_resp", "reassoc_req", "reassoc_resp",
66 "probe_req", "probe_resp", "reserved#6", "reserved#7",
67 "beacon", "atim", "disassoc", "auth",
68 "deauth", "action", "action_noack", "reserved#15"
70 const char *ieee80211_ctl_subtype_name[] = {
71 "reserved#0", "reserved#1", "reserved#2", "reserved#3",
72 "reserved#3", "reserved#5", "reserved#6", "reserved#7",
73 "reserved#8", "reserved#9", "ps_poll", "rts",
74 "cts", "ack", "cf_end", "cf_end_ack"
76 const char *ieee80211_opmode_name[IEEE80211_OPMODE_MAX] = {
77 "IBSS", /* IEEE80211_M_IBSS */
78 "STA", /* IEEE80211_M_STA */
79 "WDS", /* IEEE80211_M_WDS */
80 "AHDEMO", /* IEEE80211_M_AHDEMO */
81 "HOSTAP", /* IEEE80211_M_HOSTAP */
82 "MONITOR", /* IEEE80211_M_MONITOR */
83 "MBSS" /* IEEE80211_M_MBSS */
85 const char *ieee80211_state_name[IEEE80211_S_MAX] = {
86 "INIT", /* IEEE80211_S_INIT */
87 "SCAN", /* IEEE80211_S_SCAN */
88 "AUTH", /* IEEE80211_S_AUTH */
89 "ASSOC", /* IEEE80211_S_ASSOC */
90 "CAC", /* IEEE80211_S_CAC */
91 "RUN", /* IEEE80211_S_RUN */
92 "CSA", /* IEEE80211_S_CSA */
93 "SLEEP", /* IEEE80211_S_SLEEP */
95 const char *ieee80211_wme_acnames[] = {
103 static void beacon_miss(void *, int);
104 static void beacon_swmiss(void *, int);
105 static void parent_updown(void *, int);
106 static void update_mcast(void *, int);
107 static void update_promisc(void *, int);
108 static void update_channel(void *, int);
109 static void update_chw(void *, int);
110 static void ieee80211_newstate_cb(void *, int);
113 null_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
114 const struct ieee80211_bpf_params *params)
116 struct ifnet *ifp = ni->ni_ic->ic_ifp;
118 if_printf(ifp, "missing ic_raw_xmit callback, drop frame\n");
124 ieee80211_proto_attach(struct ieee80211com *ic)
126 struct ifnet *ifp = ic->ic_ifp;
128 /* override the 802.3 setting */
129 ifp->if_hdrlen = ic->ic_headroom
130 + sizeof(struct ieee80211_qosframe_addr4)
131 + IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN
132 + IEEE80211_WEP_EXTIVLEN;
133 /* XXX no way to recalculate on ifdetach */
134 if (ALIGN(ifp->if_hdrlen) > max_linkhdr) {
135 /* XXX sanity check... */
136 max_linkhdr = ALIGN(ifp->if_hdrlen);
137 max_hdr = max_linkhdr + max_protohdr;
138 max_datalen = MHLEN - max_hdr;
140 ic->ic_protmode = IEEE80211_PROT_CTSONLY;
142 TASK_INIT(&ic->ic_parent_task, 0, parent_updown, ifp);
143 TASK_INIT(&ic->ic_mcast_task, 0, update_mcast, ic);
144 TASK_INIT(&ic->ic_promisc_task, 0, update_promisc, ic);
145 TASK_INIT(&ic->ic_chan_task, 0, update_channel, ic);
146 TASK_INIT(&ic->ic_bmiss_task, 0, beacon_miss, ic);
147 TASK_INIT(&ic->ic_chw_task, 0, update_chw, ic);
149 ic->ic_wme.wme_hipri_switch_hysteresis =
150 AGGRESSIVE_MODE_SWITCH_HYSTERESIS;
152 /* initialize management frame handlers */
153 ic->ic_send_mgmt = ieee80211_send_mgmt;
154 ic->ic_raw_xmit = null_raw_xmit;
156 ieee80211_adhoc_attach(ic);
157 ieee80211_sta_attach(ic);
158 ieee80211_wds_attach(ic);
159 ieee80211_hostap_attach(ic);
160 #ifdef IEEE80211_SUPPORT_MESH
161 ieee80211_mesh_attach(ic);
163 ieee80211_monitor_attach(ic);
167 ieee80211_proto_detach(struct ieee80211com *ic)
169 ieee80211_monitor_detach(ic);
170 #ifdef IEEE80211_SUPPORT_MESH
171 ieee80211_mesh_detach(ic);
173 ieee80211_hostap_detach(ic);
174 ieee80211_wds_detach(ic);
175 ieee80211_adhoc_detach(ic);
176 ieee80211_sta_detach(ic);
180 null_update_beacon(struct ieee80211vap *vap, int item)
185 ieee80211_proto_vattach(struct ieee80211vap *vap)
187 struct ieee80211com *ic = vap->iv_ic;
188 struct ifnet *ifp = vap->iv_ifp;
191 /* override the 802.3 setting */
192 ifp->if_hdrlen = ic->ic_ifp->if_hdrlen;
194 vap->iv_rtsthreshold = IEEE80211_RTS_DEFAULT;
195 vap->iv_fragthreshold = IEEE80211_FRAG_DEFAULT;
196 vap->iv_bmiss_max = IEEE80211_BMISS_MAX;
197 callout_init_mtx(&vap->iv_swbmiss, IEEE80211_LOCK_OBJ(ic), 0);
198 callout_init(&vap->iv_mgtsend, 1);
199 TASK_INIT(&vap->iv_nstate_task, 0, ieee80211_newstate_cb, vap);
200 TASK_INIT(&vap->iv_swbmiss_task, 0, beacon_swmiss, vap);
202 * Install default tx rate handling: no fixed rate, lowest
203 * supported rate for mgmt and multicast frames. Default
204 * max retry count. These settings can be changed by the
205 * driver and/or user applications.
207 for (i = IEEE80211_MODE_11A; i < IEEE80211_MODE_MAX; i++) {
208 const struct ieee80211_rateset *rs = &ic->ic_sup_rates[i];
210 vap->iv_txparms[i].ucastrate = IEEE80211_FIXED_RATE_NONE;
213 * Setting the management rate to MCS 0 assumes that the
214 * BSS Basic rate set is empty and the BSS Basic MCS set
217 * Since we're not checking this, default to the lowest
218 * defined rate for this mode.
220 * At least one 11n AP (DLINK DIR-825) is reported to drop
221 * some MCS management traffic (eg BA response frames.)
223 * See also: 9.6.0 of the 802.11n-2009 specification.
226 if (i == IEEE80211_MODE_11NA || i == IEEE80211_MODE_11NG) {
227 vap->iv_txparms[i].mgmtrate = 0 | IEEE80211_RATE_MCS;
228 vap->iv_txparms[i].mcastrate = 0 | IEEE80211_RATE_MCS;
230 vap->iv_txparms[i].mgmtrate =
231 rs->rs_rates[0] & IEEE80211_RATE_VAL;
232 vap->iv_txparms[i].mcastrate =
233 rs->rs_rates[0] & IEEE80211_RATE_VAL;
236 vap->iv_txparms[i].mgmtrate = rs->rs_rates[0] & IEEE80211_RATE_VAL;
237 vap->iv_txparms[i].mcastrate = rs->rs_rates[0] & IEEE80211_RATE_VAL;
238 vap->iv_txparms[i].maxretry = IEEE80211_TXMAX_DEFAULT;
240 vap->iv_roaming = IEEE80211_ROAMING_AUTO;
242 vap->iv_update_beacon = null_update_beacon;
243 vap->iv_deliver_data = ieee80211_deliver_data;
245 /* attach support for operating mode */
246 ic->ic_vattach[vap->iv_opmode](vap);
250 ieee80211_proto_vdetach(struct ieee80211vap *vap)
252 #define FREEAPPIE(ie) do { \
254 free(ie, M_80211_NODE_IE); \
257 * Detach operating mode module.
259 if (vap->iv_opdetach != NULL)
260 vap->iv_opdetach(vap);
262 * This should not be needed as we detach when reseting
263 * the state but be conservative here since the
264 * authenticator may do things like spawn kernel threads.
266 if (vap->iv_auth->ia_detach != NULL)
267 vap->iv_auth->ia_detach(vap);
269 * Detach any ACL'ator.
271 if (vap->iv_acl != NULL)
272 vap->iv_acl->iac_detach(vap);
274 FREEAPPIE(vap->iv_appie_beacon);
275 FREEAPPIE(vap->iv_appie_probereq);
276 FREEAPPIE(vap->iv_appie_proberesp);
277 FREEAPPIE(vap->iv_appie_assocreq);
278 FREEAPPIE(vap->iv_appie_assocresp);
279 FREEAPPIE(vap->iv_appie_wpa);
284 * Simple-minded authenticator module support.
287 #define IEEE80211_AUTH_MAX (IEEE80211_AUTH_WPA+1)
288 /* XXX well-known names */
289 static const char *auth_modnames[IEEE80211_AUTH_MAX] = {
290 "wlan_internal", /* IEEE80211_AUTH_NONE */
291 "wlan_internal", /* IEEE80211_AUTH_OPEN */
292 "wlan_internal", /* IEEE80211_AUTH_SHARED */
293 "wlan_xauth", /* IEEE80211_AUTH_8021X */
294 "wlan_internal", /* IEEE80211_AUTH_AUTO */
295 "wlan_xauth", /* IEEE80211_AUTH_WPA */
297 static const struct ieee80211_authenticator *authenticators[IEEE80211_AUTH_MAX];
299 static const struct ieee80211_authenticator auth_internal = {
300 .ia_name = "wlan_internal",
303 .ia_node_join = NULL,
304 .ia_node_leave = NULL,
308 * Setup internal authenticators once; they are never unregistered.
311 ieee80211_auth_setup(void)
313 ieee80211_authenticator_register(IEEE80211_AUTH_OPEN, &auth_internal);
314 ieee80211_authenticator_register(IEEE80211_AUTH_SHARED, &auth_internal);
315 ieee80211_authenticator_register(IEEE80211_AUTH_AUTO, &auth_internal);
317 SYSINIT(wlan_auth, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_auth_setup, NULL);
319 const struct ieee80211_authenticator *
320 ieee80211_authenticator_get(int auth)
322 if (auth >= IEEE80211_AUTH_MAX)
324 if (authenticators[auth] == NULL)
325 ieee80211_load_module(auth_modnames[auth]);
326 return authenticators[auth];
330 ieee80211_authenticator_register(int type,
331 const struct ieee80211_authenticator *auth)
333 if (type >= IEEE80211_AUTH_MAX)
335 authenticators[type] = auth;
339 ieee80211_authenticator_unregister(int type)
342 if (type >= IEEE80211_AUTH_MAX)
344 authenticators[type] = NULL;
348 * Very simple-minded ACL module support.
350 /* XXX just one for now */
351 static const struct ieee80211_aclator *acl = NULL;
354 ieee80211_aclator_register(const struct ieee80211_aclator *iac)
356 printf("wlan: %s acl policy registered\n", iac->iac_name);
361 ieee80211_aclator_unregister(const struct ieee80211_aclator *iac)
365 printf("wlan: %s acl policy unregistered\n", iac->iac_name);
368 const struct ieee80211_aclator *
369 ieee80211_aclator_get(const char *name)
372 ieee80211_load_module("wlan_acl");
373 return acl != NULL && strcmp(acl->iac_name, name) == 0 ? acl : NULL;
377 ieee80211_print_essid(const uint8_t *essid, int len)
382 if (len > IEEE80211_NWID_LEN)
383 len = IEEE80211_NWID_LEN;
384 /* determine printable or not */
385 for (i = 0, p = essid; i < len; i++, p++) {
386 if (*p < ' ' || *p > 0x7e)
391 for (i = 0, p = essid; i < len; i++, p++)
396 for (i = 0, p = essid; i < len; i++, p++)
402 ieee80211_dump_pkt(struct ieee80211com *ic,
403 const uint8_t *buf, int len, int rate, int rssi)
405 const struct ieee80211_frame *wh;
408 wh = (const struct ieee80211_frame *)buf;
409 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) {
410 case IEEE80211_FC1_DIR_NODS:
411 printf("NODS %s", ether_sprintf(wh->i_addr2));
412 printf("->%s", ether_sprintf(wh->i_addr1));
413 printf("(%s)", ether_sprintf(wh->i_addr3));
415 case IEEE80211_FC1_DIR_TODS:
416 printf("TODS %s", ether_sprintf(wh->i_addr2));
417 printf("->%s", ether_sprintf(wh->i_addr3));
418 printf("(%s)", ether_sprintf(wh->i_addr1));
420 case IEEE80211_FC1_DIR_FROMDS:
421 printf("FRDS %s", ether_sprintf(wh->i_addr3));
422 printf("->%s", ether_sprintf(wh->i_addr1));
423 printf("(%s)", ether_sprintf(wh->i_addr2));
425 case IEEE80211_FC1_DIR_DSTODS:
426 printf("DSDS %s", ether_sprintf((const uint8_t *)&wh[1]));
427 printf("->%s", ether_sprintf(wh->i_addr3));
428 printf("(%s", ether_sprintf(wh->i_addr2));
429 printf("->%s)", ether_sprintf(wh->i_addr1));
432 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) {
433 case IEEE80211_FC0_TYPE_DATA:
436 case IEEE80211_FC0_TYPE_MGT:
437 printf(" %s", ieee80211_mgt_subtype_name[
438 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK)
439 >> IEEE80211_FC0_SUBTYPE_SHIFT]);
442 printf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK);
445 if (IEEE80211_QOS_HAS_SEQ(wh)) {
446 const struct ieee80211_qosframe *qwh =
447 (const struct ieee80211_qosframe *)buf;
448 printf(" QoS [TID %u%s]", qwh->i_qos[0] & IEEE80211_QOS_TID,
449 qwh->i_qos[0] & IEEE80211_QOS_ACKPOLICY ? " ACM" : "");
451 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
454 off = ieee80211_anyhdrspace(ic, wh);
455 printf(" WEP [IV %.02x %.02x %.02x",
456 buf[off+0], buf[off+1], buf[off+2]);
457 if (buf[off+IEEE80211_WEP_IVLEN] & IEEE80211_WEP_EXTIV)
458 printf(" %.02x %.02x %.02x",
459 buf[off+4], buf[off+5], buf[off+6]);
460 printf(" KID %u]", buf[off+IEEE80211_WEP_IVLEN] >> 6);
463 printf(" %dM", rate / 2);
465 printf(" +%d", rssi);
468 for (i = 0; i < len; i++) {
471 printf("%02x", buf[i]);
478 findrix(const struct ieee80211_rateset *rs, int r)
482 for (i = 0; i < rs->rs_nrates; i++)
483 if ((rs->rs_rates[i] & IEEE80211_RATE_VAL) == r)
489 ieee80211_fix_rate(struct ieee80211_node *ni,
490 struct ieee80211_rateset *nrs, int flags)
492 #define RV(v) ((v) & IEEE80211_RATE_VAL)
493 struct ieee80211vap *vap = ni->ni_vap;
494 struct ieee80211com *ic = ni->ni_ic;
495 int i, j, rix, error;
496 int okrate, badrate, fixedrate, ucastrate;
497 const struct ieee80211_rateset *srs;
501 okrate = badrate = 0;
502 ucastrate = vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)].ucastrate;
503 if (ucastrate != IEEE80211_FIXED_RATE_NONE) {
505 * Workaround awkwardness with fixed rate. We are called
506 * to check both the legacy rate set and the HT rate set
507 * but we must apply any legacy fixed rate check only to the
508 * legacy rate set and vice versa. We cannot tell what type
509 * of rate set we've been given (legacy or HT) but we can
510 * distinguish the fixed rate type (MCS have 0x80 set).
511 * So to deal with this the caller communicates whether to
512 * check MCS or legacy rate using the flags and we use the
513 * type of any fixed rate to avoid applying an MCS to a
514 * legacy rate and vice versa.
516 if (ucastrate & 0x80) {
517 if (flags & IEEE80211_F_DOFRATE)
518 flags &= ~IEEE80211_F_DOFRATE;
519 } else if ((ucastrate & 0x80) == 0) {
520 if (flags & IEEE80211_F_DOFMCS)
521 flags &= ~IEEE80211_F_DOFMCS;
523 /* NB: required to make MCS match below work */
524 ucastrate &= IEEE80211_RATE_VAL;
526 fixedrate = IEEE80211_FIXED_RATE_NONE;
528 * XXX we are called to process both MCS and legacy rates;
529 * we must use the appropriate basic rate set or chaos will
530 * ensue; for now callers that want MCS must supply
531 * IEEE80211_F_DOBRS; at some point we'll need to split this
532 * function so there are two variants, one for MCS and one
535 if (flags & IEEE80211_F_DOBRS)
536 srs = (const struct ieee80211_rateset *)
537 ieee80211_get_suphtrates(ic, ni->ni_chan);
539 srs = ieee80211_get_suprates(ic, ni->ni_chan);
540 for (i = 0; i < nrs->rs_nrates; ) {
541 if (flags & IEEE80211_F_DOSORT) {
545 for (j = i + 1; j < nrs->rs_nrates; j++) {
546 if (RV(nrs->rs_rates[i]) > RV(nrs->rs_rates[j])) {
547 r = nrs->rs_rates[i];
548 nrs->rs_rates[i] = nrs->rs_rates[j];
549 nrs->rs_rates[j] = r;
553 r = nrs->rs_rates[i] & IEEE80211_RATE_VAL;
556 * Check for fixed rate.
561 * Check against supported rates.
563 rix = findrix(srs, r);
564 if (flags & IEEE80211_F_DONEGO) {
567 * A rate in the node's rate set is not
568 * supported. If this is a basic rate and we
569 * are operating as a STA then this is an error.
570 * Otherwise we just discard/ignore the rate.
572 if ((flags & IEEE80211_F_JOIN) &&
573 (nrs->rs_rates[i] & IEEE80211_RATE_BASIC))
575 } else if ((flags & IEEE80211_F_JOIN) == 0) {
577 * Overwrite with the supported rate
578 * value so any basic rate bit is set.
580 nrs->rs_rates[i] = srs->rs_rates[rix];
583 if ((flags & IEEE80211_F_DODEL) && rix < 0) {
585 * Delete unacceptable rates.
588 for (j = i; j < nrs->rs_nrates; j++)
589 nrs->rs_rates[j] = nrs->rs_rates[j + 1];
590 nrs->rs_rates[j] = 0;
594 okrate = nrs->rs_rates[i];
597 if (okrate == 0 || error != 0 ||
598 ((flags & (IEEE80211_F_DOFRATE|IEEE80211_F_DOFMCS)) &&
599 fixedrate != ucastrate)) {
600 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni,
601 "%s: flags 0x%x okrate %d error %d fixedrate 0x%x "
602 "ucastrate %x\n", __func__, fixedrate, ucastrate, flags);
603 return badrate | IEEE80211_RATE_BASIC;
610 * Reset 11g-related state.
613 ieee80211_reset_erp(struct ieee80211com *ic)
615 ic->ic_flags &= ~IEEE80211_F_USEPROT;
616 ic->ic_nonerpsta = 0;
617 ic->ic_longslotsta = 0;
619 * Short slot time is enabled only when operating in 11g
620 * and not in an IBSS. We must also honor whether or not
621 * the driver is capable of doing it.
623 ieee80211_set_shortslottime(ic,
624 IEEE80211_IS_CHAN_A(ic->ic_curchan) ||
625 IEEE80211_IS_CHAN_HT(ic->ic_curchan) ||
626 (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
627 ic->ic_opmode == IEEE80211_M_HOSTAP &&
628 (ic->ic_caps & IEEE80211_C_SHSLOT)));
630 * Set short preamble and ERP barker-preamble flags.
632 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) ||
633 (ic->ic_caps & IEEE80211_C_SHPREAMBLE)) {
634 ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
635 ic->ic_flags &= ~IEEE80211_F_USEBARKER;
637 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
638 ic->ic_flags |= IEEE80211_F_USEBARKER;
643 * Set the short slot time state and notify the driver.
646 ieee80211_set_shortslottime(struct ieee80211com *ic, int onoff)
649 ic->ic_flags |= IEEE80211_F_SHSLOT;
651 ic->ic_flags &= ~IEEE80211_F_SHSLOT;
653 if (ic->ic_updateslot != NULL)
654 ic->ic_updateslot(ic->ic_ifp);
658 * Check if the specified rate set supports ERP.
659 * NB: the rate set is assumed to be sorted.
662 ieee80211_iserp_rateset(const struct ieee80211_rateset *rs)
664 static const int rates[] = { 2, 4, 11, 22, 12, 24, 48 };
667 if (rs->rs_nrates < nitems(rates))
669 for (i = 0; i < nitems(rates); i++) {
670 for (j = 0; j < rs->rs_nrates; j++) {
671 int r = rs->rs_rates[j] & IEEE80211_RATE_VAL;
685 * Mark the basic rates for the rate table based on the
686 * operating mode. For real 11g we mark all the 11b rates
687 * and 6, 12, and 24 OFDM. For 11b compatibility we mark only
688 * 11b rates. There's also a pseudo 11a-mode used to mark only
689 * the basic OFDM rates.
692 setbasicrates(struct ieee80211_rateset *rs,
693 enum ieee80211_phymode mode, int add)
695 static const struct ieee80211_rateset basic[IEEE80211_MODE_MAX] = {
696 [IEEE80211_MODE_11A] = { 3, { 12, 24, 48 } },
697 [IEEE80211_MODE_11B] = { 2, { 2, 4 } },
699 [IEEE80211_MODE_11G] = { 4, { 2, 4, 11, 22 } },
700 [IEEE80211_MODE_TURBO_A] = { 3, { 12, 24, 48 } },
701 [IEEE80211_MODE_TURBO_G] = { 4, { 2, 4, 11, 22 } },
702 [IEEE80211_MODE_STURBO_A] = { 3, { 12, 24, 48 } },
703 [IEEE80211_MODE_HALF] = { 3, { 6, 12, 24 } },
704 [IEEE80211_MODE_QUARTER] = { 3, { 3, 6, 12 } },
705 [IEEE80211_MODE_11NA] = { 3, { 12, 24, 48 } },
707 [IEEE80211_MODE_11NG] = { 4, { 2, 4, 11, 22 } },
711 for (i = 0; i < rs->rs_nrates; i++) {
713 rs->rs_rates[i] &= IEEE80211_RATE_VAL;
714 for (j = 0; j < basic[mode].rs_nrates; j++)
715 if (basic[mode].rs_rates[j] == rs->rs_rates[i]) {
716 rs->rs_rates[i] |= IEEE80211_RATE_BASIC;
723 * Set the basic rates in a rate set.
726 ieee80211_setbasicrates(struct ieee80211_rateset *rs,
727 enum ieee80211_phymode mode)
729 setbasicrates(rs, mode, 0);
733 * Add basic rates to a rate set.
736 ieee80211_addbasicrates(struct ieee80211_rateset *rs,
737 enum ieee80211_phymode mode)
739 setbasicrates(rs, mode, 1);
743 * WME protocol support.
745 * The default 11a/b/g/n parameters come from the WiFi Alliance WMM
746 * System Interopability Test Plan (v1.4, Appendix F) and the 802.11n
747 * Draft 2.0 Test Plan (Appendix D).
749 * Static/Dynamic Turbo mode settings come from Atheros.
751 typedef struct phyParamType {
759 static const struct phyParamType phyParamForAC_BE[IEEE80211_MODE_MAX] = {
760 [IEEE80211_MODE_AUTO] = { 3, 4, 6, 0, 0 },
761 [IEEE80211_MODE_11A] = { 3, 4, 6, 0, 0 },
762 [IEEE80211_MODE_11B] = { 3, 4, 6, 0, 0 },
763 [IEEE80211_MODE_11G] = { 3, 4, 6, 0, 0 },
764 [IEEE80211_MODE_FH] = { 3, 4, 6, 0, 0 },
765 [IEEE80211_MODE_TURBO_A]= { 2, 3, 5, 0, 0 },
766 [IEEE80211_MODE_TURBO_G]= { 2, 3, 5, 0, 0 },
767 [IEEE80211_MODE_STURBO_A]={ 2, 3, 5, 0, 0 },
768 [IEEE80211_MODE_HALF] = { 3, 4, 6, 0, 0 },
769 [IEEE80211_MODE_QUARTER]= { 3, 4, 6, 0, 0 },
770 [IEEE80211_MODE_11NA] = { 3, 4, 6, 0, 0 },
771 [IEEE80211_MODE_11NG] = { 3, 4, 6, 0, 0 },
773 static const struct phyParamType phyParamForAC_BK[IEEE80211_MODE_MAX] = {
774 [IEEE80211_MODE_AUTO] = { 7, 4, 10, 0, 0 },
775 [IEEE80211_MODE_11A] = { 7, 4, 10, 0, 0 },
776 [IEEE80211_MODE_11B] = { 7, 4, 10, 0, 0 },
777 [IEEE80211_MODE_11G] = { 7, 4, 10, 0, 0 },
778 [IEEE80211_MODE_FH] = { 7, 4, 10, 0, 0 },
779 [IEEE80211_MODE_TURBO_A]= { 7, 3, 10, 0, 0 },
780 [IEEE80211_MODE_TURBO_G]= { 7, 3, 10, 0, 0 },
781 [IEEE80211_MODE_STURBO_A]={ 7, 3, 10, 0, 0 },
782 [IEEE80211_MODE_HALF] = { 7, 4, 10, 0, 0 },
783 [IEEE80211_MODE_QUARTER]= { 7, 4, 10, 0, 0 },
784 [IEEE80211_MODE_11NA] = { 7, 4, 10, 0, 0 },
785 [IEEE80211_MODE_11NG] = { 7, 4, 10, 0, 0 },
787 static const struct phyParamType phyParamForAC_VI[IEEE80211_MODE_MAX] = {
788 [IEEE80211_MODE_AUTO] = { 1, 3, 4, 94, 0 },
789 [IEEE80211_MODE_11A] = { 1, 3, 4, 94, 0 },
790 [IEEE80211_MODE_11B] = { 1, 3, 4, 188, 0 },
791 [IEEE80211_MODE_11G] = { 1, 3, 4, 94, 0 },
792 [IEEE80211_MODE_FH] = { 1, 3, 4, 188, 0 },
793 [IEEE80211_MODE_TURBO_A]= { 1, 2, 3, 94, 0 },
794 [IEEE80211_MODE_TURBO_G]= { 1, 2, 3, 94, 0 },
795 [IEEE80211_MODE_STURBO_A]={ 1, 2, 3, 94, 0 },
796 [IEEE80211_MODE_HALF] = { 1, 3, 4, 94, 0 },
797 [IEEE80211_MODE_QUARTER]= { 1, 3, 4, 94, 0 },
798 [IEEE80211_MODE_11NA] = { 1, 3, 4, 94, 0 },
799 [IEEE80211_MODE_11NG] = { 1, 3, 4, 94, 0 },
801 static const struct phyParamType phyParamForAC_VO[IEEE80211_MODE_MAX] = {
802 [IEEE80211_MODE_AUTO] = { 1, 2, 3, 47, 0 },
803 [IEEE80211_MODE_11A] = { 1, 2, 3, 47, 0 },
804 [IEEE80211_MODE_11B] = { 1, 2, 3, 102, 0 },
805 [IEEE80211_MODE_11G] = { 1, 2, 3, 47, 0 },
806 [IEEE80211_MODE_FH] = { 1, 2, 3, 102, 0 },
807 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 },
808 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 },
809 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 },
810 [IEEE80211_MODE_HALF] = { 1, 2, 3, 47, 0 },
811 [IEEE80211_MODE_QUARTER]= { 1, 2, 3, 47, 0 },
812 [IEEE80211_MODE_11NA] = { 1, 2, 3, 47, 0 },
813 [IEEE80211_MODE_11NG] = { 1, 2, 3, 47, 0 },
816 static const struct phyParamType bssPhyParamForAC_BE[IEEE80211_MODE_MAX] = {
817 [IEEE80211_MODE_AUTO] = { 3, 4, 10, 0, 0 },
818 [IEEE80211_MODE_11A] = { 3, 4, 10, 0, 0 },
819 [IEEE80211_MODE_11B] = { 3, 4, 10, 0, 0 },
820 [IEEE80211_MODE_11G] = { 3, 4, 10, 0, 0 },
821 [IEEE80211_MODE_FH] = { 3, 4, 10, 0, 0 },
822 [IEEE80211_MODE_TURBO_A]= { 2, 3, 10, 0, 0 },
823 [IEEE80211_MODE_TURBO_G]= { 2, 3, 10, 0, 0 },
824 [IEEE80211_MODE_STURBO_A]={ 2, 3, 10, 0, 0 },
825 [IEEE80211_MODE_HALF] = { 3, 4, 10, 0, 0 },
826 [IEEE80211_MODE_QUARTER]= { 3, 4, 10, 0, 0 },
827 [IEEE80211_MODE_11NA] = { 3, 4, 10, 0, 0 },
828 [IEEE80211_MODE_11NG] = { 3, 4, 10, 0, 0 },
830 static const struct phyParamType bssPhyParamForAC_VI[IEEE80211_MODE_MAX] = {
831 [IEEE80211_MODE_AUTO] = { 2, 3, 4, 94, 0 },
832 [IEEE80211_MODE_11A] = { 2, 3, 4, 94, 0 },
833 [IEEE80211_MODE_11B] = { 2, 3, 4, 188, 0 },
834 [IEEE80211_MODE_11G] = { 2, 3, 4, 94, 0 },
835 [IEEE80211_MODE_FH] = { 2, 3, 4, 188, 0 },
836 [IEEE80211_MODE_TURBO_A]= { 2, 2, 3, 94, 0 },
837 [IEEE80211_MODE_TURBO_G]= { 2, 2, 3, 94, 0 },
838 [IEEE80211_MODE_STURBO_A]={ 2, 2, 3, 94, 0 },
839 [IEEE80211_MODE_HALF] = { 2, 3, 4, 94, 0 },
840 [IEEE80211_MODE_QUARTER]= { 2, 3, 4, 94, 0 },
841 [IEEE80211_MODE_11NA] = { 2, 3, 4, 94, 0 },
842 [IEEE80211_MODE_11NG] = { 2, 3, 4, 94, 0 },
844 static const struct phyParamType bssPhyParamForAC_VO[IEEE80211_MODE_MAX] = {
845 [IEEE80211_MODE_AUTO] = { 2, 2, 3, 47, 0 },
846 [IEEE80211_MODE_11A] = { 2, 2, 3, 47, 0 },
847 [IEEE80211_MODE_11B] = { 2, 2, 3, 102, 0 },
848 [IEEE80211_MODE_11G] = { 2, 2, 3, 47, 0 },
849 [IEEE80211_MODE_FH] = { 2, 2, 3, 102, 0 },
850 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 },
851 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 },
852 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 },
853 [IEEE80211_MODE_HALF] = { 2, 2, 3, 47, 0 },
854 [IEEE80211_MODE_QUARTER]= { 2, 2, 3, 47, 0 },
855 [IEEE80211_MODE_11NA] = { 2, 2, 3, 47, 0 },
856 [IEEE80211_MODE_11NG] = { 2, 2, 3, 47, 0 },
860 _setifsparams(struct wmeParams *wmep, const paramType *phy)
862 wmep->wmep_aifsn = phy->aifsn;
863 wmep->wmep_logcwmin = phy->logcwmin;
864 wmep->wmep_logcwmax = phy->logcwmax;
865 wmep->wmep_txopLimit = phy->txopLimit;
869 setwmeparams(struct ieee80211vap *vap, const char *type, int ac,
870 struct wmeParams *wmep, const paramType *phy)
872 wmep->wmep_acm = phy->acm;
873 _setifsparams(wmep, phy);
875 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
876 "set %s (%s) [acm %u aifsn %u logcwmin %u logcwmax %u txop %u]\n",
877 ieee80211_wme_acnames[ac], type,
878 wmep->wmep_acm, wmep->wmep_aifsn, wmep->wmep_logcwmin,
879 wmep->wmep_logcwmax, wmep->wmep_txopLimit);
883 ieee80211_wme_initparams_locked(struct ieee80211vap *vap)
885 struct ieee80211com *ic = vap->iv_ic;
886 struct ieee80211_wme_state *wme = &ic->ic_wme;
887 const paramType *pPhyParam, *pBssPhyParam;
888 struct wmeParams *wmep;
889 enum ieee80211_phymode mode;
892 IEEE80211_LOCK_ASSERT(ic);
894 if ((ic->ic_caps & IEEE80211_C_WME) == 0 || ic->ic_nrunning > 1)
898 * Clear the wme cap_info field so a qoscount from a previous
899 * vap doesn't confuse later code which only parses the beacon
900 * field and updates hardware when said field changes.
901 * Otherwise the hardware is programmed with defaults, not what
902 * the beacon actually announces.
904 wme->wme_wmeChanParams.cap_info = 0;
907 * Select mode; we can be called early in which case we
908 * always use auto mode. We know we'll be called when
909 * entering the RUN state with bsschan setup properly
910 * so state will eventually get set correctly
912 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC)
913 mode = ieee80211_chan2mode(ic->ic_bsschan);
915 mode = IEEE80211_MODE_AUTO;
916 for (i = 0; i < WME_NUM_AC; i++) {
919 pPhyParam = &phyParamForAC_BK[mode];
920 pBssPhyParam = &phyParamForAC_BK[mode];
923 pPhyParam = &phyParamForAC_VI[mode];
924 pBssPhyParam = &bssPhyParamForAC_VI[mode];
927 pPhyParam = &phyParamForAC_VO[mode];
928 pBssPhyParam = &bssPhyParamForAC_VO[mode];
932 pPhyParam = &phyParamForAC_BE[mode];
933 pBssPhyParam = &bssPhyParamForAC_BE[mode];
936 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i];
937 if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
938 setwmeparams(vap, "chan", i, wmep, pPhyParam);
940 setwmeparams(vap, "chan", i, wmep, pBssPhyParam);
942 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i];
943 setwmeparams(vap, "bss ", i, wmep, pBssPhyParam);
945 /* NB: check ic_bss to avoid NULL deref on initial attach */
946 if (vap->iv_bss != NULL) {
948 * Calculate agressive mode switching threshold based
949 * on beacon interval. This doesn't need locking since
950 * we're only called before entering the RUN state at
951 * which point we start sending beacon frames.
953 wme->wme_hipri_switch_thresh =
954 (HIGH_PRI_SWITCH_THRESH * vap->iv_bss->ni_intval) / 100;
955 wme->wme_flags &= ~WME_F_AGGRMODE;
956 ieee80211_wme_updateparams(vap);
961 ieee80211_wme_initparams(struct ieee80211vap *vap)
963 struct ieee80211com *ic = vap->iv_ic;
966 ieee80211_wme_initparams_locked(vap);
967 IEEE80211_UNLOCK(ic);
971 * Update WME parameters for ourself and the BSS.
974 ieee80211_wme_updateparams_locked(struct ieee80211vap *vap)
976 static const paramType aggrParam[IEEE80211_MODE_MAX] = {
977 [IEEE80211_MODE_AUTO] = { 2, 4, 10, 64, 0 },
978 [IEEE80211_MODE_11A] = { 2, 4, 10, 64, 0 },
979 [IEEE80211_MODE_11B] = { 2, 5, 10, 64, 0 },
980 [IEEE80211_MODE_11G] = { 2, 4, 10, 64, 0 },
981 [IEEE80211_MODE_FH] = { 2, 5, 10, 64, 0 },
982 [IEEE80211_MODE_TURBO_A] = { 1, 3, 10, 64, 0 },
983 [IEEE80211_MODE_TURBO_G] = { 1, 3, 10, 64, 0 },
984 [IEEE80211_MODE_STURBO_A] = { 1, 3, 10, 64, 0 },
985 [IEEE80211_MODE_HALF] = { 2, 4, 10, 64, 0 },
986 [IEEE80211_MODE_QUARTER] = { 2, 4, 10, 64, 0 },
987 [IEEE80211_MODE_11NA] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/
988 [IEEE80211_MODE_11NG] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/
990 struct ieee80211com *ic = vap->iv_ic;
991 struct ieee80211_wme_state *wme = &ic->ic_wme;
992 const struct wmeParams *wmep;
993 struct wmeParams *chanp, *bssp;
994 enum ieee80211_phymode mode;
999 * Set up the channel access parameters for the physical
1000 * device. First populate the configured settings.
1002 for (i = 0; i < WME_NUM_AC; i++) {
1003 chanp = &wme->wme_chanParams.cap_wmeParams[i];
1004 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i];
1005 chanp->wmep_aifsn = wmep->wmep_aifsn;
1006 chanp->wmep_logcwmin = wmep->wmep_logcwmin;
1007 chanp->wmep_logcwmax = wmep->wmep_logcwmax;
1008 chanp->wmep_txopLimit = wmep->wmep_txopLimit;
1010 chanp = &wme->wme_bssChanParams.cap_wmeParams[i];
1011 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i];
1012 chanp->wmep_aifsn = wmep->wmep_aifsn;
1013 chanp->wmep_logcwmin = wmep->wmep_logcwmin;
1014 chanp->wmep_logcwmax = wmep->wmep_logcwmax;
1015 chanp->wmep_txopLimit = wmep->wmep_txopLimit;
1019 * Select mode; we can be called early in which case we
1020 * always use auto mode. We know we'll be called when
1021 * entering the RUN state with bsschan setup properly
1022 * so state will eventually get set correctly
1024 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC)
1025 mode = ieee80211_chan2mode(ic->ic_bsschan);
1027 mode = IEEE80211_MODE_AUTO;
1030 * This implements agressive mode as found in certain
1031 * vendors' AP's. When there is significant high
1032 * priority (VI/VO) traffic in the BSS throttle back BE
1033 * traffic by using conservative parameters. Otherwise
1034 * BE uses agressive params to optimize performance of
1035 * legacy/non-QoS traffic.
1038 /* Hostap? Only if aggressive mode is enabled */
1039 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
1040 (wme->wme_flags & WME_F_AGGRMODE) != 0)
1044 * Station? Only if we're in a non-QoS BSS.
1046 else if ((vap->iv_opmode == IEEE80211_M_STA &&
1047 (vap->iv_bss->ni_flags & IEEE80211_NODE_QOS) == 0))
1051 * IBSS? Only if we we have WME enabled.
1053 else if ((vap->iv_opmode == IEEE80211_M_IBSS) &&
1054 (vap->iv_flags & IEEE80211_F_WME))
1058 * If WME is disabled on this VAP, default to aggressive mode
1059 * regardless of the configuration.
1061 if ((vap->iv_flags & IEEE80211_F_WME) == 0)
1069 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE];
1070 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE];
1072 chanp->wmep_aifsn = bssp->wmep_aifsn = aggrParam[mode].aifsn;
1073 chanp->wmep_logcwmin = bssp->wmep_logcwmin =
1074 aggrParam[mode].logcwmin;
1075 chanp->wmep_logcwmax = bssp->wmep_logcwmax =
1076 aggrParam[mode].logcwmax;
1077 chanp->wmep_txopLimit = bssp->wmep_txopLimit =
1078 (vap->iv_flags & IEEE80211_F_BURST) ?
1079 aggrParam[mode].txopLimit : 0;
1080 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1081 "update %s (chan+bss) [acm %u aifsn %u logcwmin %u "
1082 "logcwmax %u txop %u]\n", ieee80211_wme_acnames[WME_AC_BE],
1083 chanp->wmep_acm, chanp->wmep_aifsn, chanp->wmep_logcwmin,
1084 chanp->wmep_logcwmax, chanp->wmep_txopLimit);
1089 * Change the contention window based on the number of associated
1090 * stations. If the number of associated stations is 1 and
1091 * aggressive mode is enabled, lower the contention window even
1094 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
1095 ic->ic_sta_assoc < 2 && (wme->wme_flags & WME_F_AGGRMODE) != 0) {
1096 static const uint8_t logCwMin[IEEE80211_MODE_MAX] = {
1097 [IEEE80211_MODE_AUTO] = 3,
1098 [IEEE80211_MODE_11A] = 3,
1099 [IEEE80211_MODE_11B] = 4,
1100 [IEEE80211_MODE_11G] = 3,
1101 [IEEE80211_MODE_FH] = 4,
1102 [IEEE80211_MODE_TURBO_A] = 3,
1103 [IEEE80211_MODE_TURBO_G] = 3,
1104 [IEEE80211_MODE_STURBO_A] = 3,
1105 [IEEE80211_MODE_HALF] = 3,
1106 [IEEE80211_MODE_QUARTER] = 3,
1107 [IEEE80211_MODE_11NA] = 3,
1108 [IEEE80211_MODE_11NG] = 3,
1110 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE];
1111 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE];
1113 chanp->wmep_logcwmin = bssp->wmep_logcwmin = logCwMin[mode];
1114 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1115 "update %s (chan+bss) logcwmin %u\n",
1116 ieee80211_wme_acnames[WME_AC_BE], chanp->wmep_logcwmin);
1120 * Arrange for the beacon update.
1122 * XXX what about MBSS, WDS?
1124 if (vap->iv_opmode == IEEE80211_M_HOSTAP
1125 || vap->iv_opmode == IEEE80211_M_IBSS) {
1127 * Arrange for a beacon update and bump the parameter
1128 * set number so associated stations load the new values.
1130 wme->wme_bssChanParams.cap_info =
1131 (wme->wme_bssChanParams.cap_info+1) & WME_QOSINFO_COUNT;
1132 ieee80211_beacon_notify(vap, IEEE80211_BEACON_WME);
1135 wme->wme_update(ic);
1137 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1138 "%s: WME params updated, cap_info 0x%x\n", __func__,
1139 vap->iv_opmode == IEEE80211_M_STA ?
1140 wme->wme_wmeChanParams.cap_info :
1141 wme->wme_bssChanParams.cap_info);
1145 ieee80211_wme_updateparams(struct ieee80211vap *vap)
1147 struct ieee80211com *ic = vap->iv_ic;
1149 if (ic->ic_caps & IEEE80211_C_WME) {
1151 ieee80211_wme_updateparams_locked(vap);
1152 IEEE80211_UNLOCK(ic);
1157 parent_updown(void *arg, int npending)
1159 struct ifnet *parent = arg;
1161 parent->if_ioctl(parent, SIOCSIFFLAGS, NULL);
1165 update_mcast(void *arg, int npending)
1167 struct ieee80211com *ic = arg;
1168 struct ifnet *parent = ic->ic_ifp;
1170 ic->ic_update_mcast(parent);
1174 update_promisc(void *arg, int npending)
1176 struct ieee80211com *ic = arg;
1177 struct ifnet *parent = ic->ic_ifp;
1179 ic->ic_update_promisc(parent);
1183 update_channel(void *arg, int npending)
1185 struct ieee80211com *ic = arg;
1187 ic->ic_set_channel(ic);
1188 ieee80211_radiotap_chan_change(ic);
1192 update_chw(void *arg, int npending)
1194 struct ieee80211com *ic = arg;
1197 * XXX should we defer the channel width _config_ update until now?
1199 ic->ic_update_chw(ic);
1203 * Block until the parent is in a known state. This is
1204 * used after any operations that dispatch a task (e.g.
1205 * to auto-configure the parent device up/down).
1208 ieee80211_waitfor_parent(struct ieee80211com *ic)
1210 taskqueue_block(ic->ic_tq);
1211 ieee80211_draintask(ic, &ic->ic_parent_task);
1212 ieee80211_draintask(ic, &ic->ic_mcast_task);
1213 ieee80211_draintask(ic, &ic->ic_promisc_task);
1214 ieee80211_draintask(ic, &ic->ic_chan_task);
1215 ieee80211_draintask(ic, &ic->ic_bmiss_task);
1216 ieee80211_draintask(ic, &ic->ic_chw_task);
1217 taskqueue_unblock(ic->ic_tq);
1221 * Start a vap running. If this is the first vap to be
1222 * set running on the underlying device then we
1223 * automatically bring the device up.
1226 ieee80211_start_locked(struct ieee80211vap *vap)
1228 struct ifnet *ifp = vap->iv_ifp;
1229 struct ieee80211com *ic = vap->iv_ic;
1230 struct ifnet *parent = ic->ic_ifp;
1232 IEEE80211_LOCK_ASSERT(ic);
1234 IEEE80211_DPRINTF(vap,
1235 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1236 "start running, %d vaps running\n", ic->ic_nrunning);
1238 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
1240 * Mark us running. Note that it's ok to do this first;
1241 * if we need to bring the parent device up we defer that
1242 * to avoid dropping the com lock. We expect the device
1243 * to respond to being marked up by calling back into us
1244 * through ieee80211_start_all at which point we'll come
1245 * back in here and complete the work.
1247 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1249 * We are not running; if this we are the first vap
1250 * to be brought up auto-up the parent if necessary.
1252 if (ic->ic_nrunning++ == 0 &&
1253 (parent->if_drv_flags & IFF_DRV_RUNNING) == 0) {
1254 IEEE80211_DPRINTF(vap,
1255 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1256 "%s: up parent %s\n", __func__, parent->if_xname);
1257 parent->if_flags |= IFF_UP;
1258 ieee80211_runtask(ic, &ic->ic_parent_task);
1263 * If the parent is up and running, then kick the
1264 * 802.11 state machine as appropriate.
1266 if ((parent->if_drv_flags & IFF_DRV_RUNNING) &&
1267 vap->iv_roaming != IEEE80211_ROAMING_MANUAL) {
1268 if (vap->iv_opmode == IEEE80211_M_STA) {
1270 /* XXX bypasses scan too easily; disable for now */
1272 * Try to be intelligent about clocking the state
1273 * machine. If we're currently in RUN state then
1274 * we should be able to apply any new state/parameters
1275 * simply by re-associating. Otherwise we need to
1276 * re-scan to select an appropriate ap.
1278 if (vap->iv_state >= IEEE80211_S_RUN)
1279 ieee80211_new_state_locked(vap,
1280 IEEE80211_S_ASSOC, 1);
1283 ieee80211_new_state_locked(vap,
1284 IEEE80211_S_SCAN, 0);
1287 * For monitor+wds mode there's nothing to do but
1288 * start running. Otherwise if this is the first
1289 * vap to be brought up, start a scan which may be
1290 * preempted if the station is locked to a particular
1293 vap->iv_flags_ext |= IEEE80211_FEXT_REINIT;
1294 if (vap->iv_opmode == IEEE80211_M_MONITOR ||
1295 vap->iv_opmode == IEEE80211_M_WDS)
1296 ieee80211_new_state_locked(vap,
1297 IEEE80211_S_RUN, -1);
1299 ieee80211_new_state_locked(vap,
1300 IEEE80211_S_SCAN, 0);
1306 * Start a single vap.
1309 ieee80211_init(void *arg)
1311 struct ieee80211vap *vap = arg;
1313 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1316 IEEE80211_LOCK(vap->iv_ic);
1317 ieee80211_start_locked(vap);
1318 IEEE80211_UNLOCK(vap->iv_ic);
1322 * Start all runnable vap's on a device.
1325 ieee80211_start_all(struct ieee80211com *ic)
1327 struct ieee80211vap *vap;
1330 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1331 struct ifnet *ifp = vap->iv_ifp;
1332 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */
1333 ieee80211_start_locked(vap);
1335 IEEE80211_UNLOCK(ic);
1339 * Stop a vap. We force it down using the state machine
1340 * then mark it's ifnet not running. If this is the last
1341 * vap running on the underlying device then we close it
1342 * too to insure it will be properly initialized when the
1343 * next vap is brought up.
1346 ieee80211_stop_locked(struct ieee80211vap *vap)
1348 struct ieee80211com *ic = vap->iv_ic;
1349 struct ifnet *ifp = vap->iv_ifp;
1350 struct ifnet *parent = ic->ic_ifp;
1352 IEEE80211_LOCK_ASSERT(ic);
1354 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1355 "stop running, %d vaps running\n", ic->ic_nrunning);
1357 ieee80211_new_state_locked(vap, IEEE80211_S_INIT, -1);
1358 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
1359 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; /* mark us stopped */
1360 if (--ic->ic_nrunning == 0 &&
1361 (parent->if_drv_flags & IFF_DRV_RUNNING)) {
1362 IEEE80211_DPRINTF(vap,
1363 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1364 "down parent %s\n", parent->if_xname);
1365 parent->if_flags &= ~IFF_UP;
1366 ieee80211_runtask(ic, &ic->ic_parent_task);
1372 ieee80211_stop(struct ieee80211vap *vap)
1374 struct ieee80211com *ic = vap->iv_ic;
1377 ieee80211_stop_locked(vap);
1378 IEEE80211_UNLOCK(ic);
1382 * Stop all vap's running on a device.
1385 ieee80211_stop_all(struct ieee80211com *ic)
1387 struct ieee80211vap *vap;
1390 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1391 struct ifnet *ifp = vap->iv_ifp;
1392 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */
1393 ieee80211_stop_locked(vap);
1395 IEEE80211_UNLOCK(ic);
1397 ieee80211_waitfor_parent(ic);
1401 * Stop all vap's running on a device and arrange
1402 * for those that were running to be resumed.
1405 ieee80211_suspend_all(struct ieee80211com *ic)
1407 struct ieee80211vap *vap;
1410 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1411 struct ifnet *ifp = vap->iv_ifp;
1412 if (IFNET_IS_UP_RUNNING(ifp)) { /* NB: avoid recursion */
1413 vap->iv_flags_ext |= IEEE80211_FEXT_RESUME;
1414 ieee80211_stop_locked(vap);
1417 IEEE80211_UNLOCK(ic);
1419 ieee80211_waitfor_parent(ic);
1423 * Start all vap's marked for resume.
1426 ieee80211_resume_all(struct ieee80211com *ic)
1428 struct ieee80211vap *vap;
1431 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1432 struct ifnet *ifp = vap->iv_ifp;
1433 if (!IFNET_IS_UP_RUNNING(ifp) &&
1434 (vap->iv_flags_ext & IEEE80211_FEXT_RESUME)) {
1435 vap->iv_flags_ext &= ~IEEE80211_FEXT_RESUME;
1436 ieee80211_start_locked(vap);
1439 IEEE80211_UNLOCK(ic);
1443 ieee80211_beacon_miss(struct ieee80211com *ic)
1446 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1447 /* Process in a taskq, the handler may reenter the driver */
1448 ieee80211_runtask(ic, &ic->ic_bmiss_task);
1450 IEEE80211_UNLOCK(ic);
1454 beacon_miss(void *arg, int npending)
1456 struct ieee80211com *ic = arg;
1457 struct ieee80211vap *vap;
1460 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1462 * We only pass events through for sta vap's in RUN state;
1463 * may be too restrictive but for now this saves all the
1464 * handlers duplicating these checks.
1466 if (vap->iv_opmode == IEEE80211_M_STA &&
1467 vap->iv_state >= IEEE80211_S_RUN &&
1468 vap->iv_bmiss != NULL)
1471 IEEE80211_UNLOCK(ic);
1475 beacon_swmiss(void *arg, int npending)
1477 struct ieee80211vap *vap = arg;
1478 struct ieee80211com *ic = vap->iv_ic;
1481 if (vap->iv_state == IEEE80211_S_RUN) {
1482 /* XXX Call multiple times if npending > zero? */
1485 IEEE80211_UNLOCK(ic);
1489 * Software beacon miss handling. Check if any beacons
1490 * were received in the last period. If not post a
1491 * beacon miss; otherwise reset the counter.
1494 ieee80211_swbmiss(void *arg)
1496 struct ieee80211vap *vap = arg;
1497 struct ieee80211com *ic = vap->iv_ic;
1499 IEEE80211_LOCK_ASSERT(ic);
1501 /* XXX sleep state? */
1502 KASSERT(vap->iv_state == IEEE80211_S_RUN,
1503 ("wrong state %d", vap->iv_state));
1505 if (ic->ic_flags & IEEE80211_F_SCAN) {
1507 * If scanning just ignore and reset state. If we get a
1508 * bmiss after coming out of scan because we haven't had
1509 * time to receive a beacon then we should probe the AP
1510 * before posting a real bmiss (unless iv_bmiss_max has
1511 * been artifiically lowered). A cleaner solution might
1512 * be to disable the timer on scan start/end but to handle
1513 * case of multiple sta vap's we'd need to disable the
1514 * timers of all affected vap's.
1516 vap->iv_swbmiss_count = 0;
1517 } else if (vap->iv_swbmiss_count == 0) {
1518 if (vap->iv_bmiss != NULL)
1519 ieee80211_runtask(ic, &vap->iv_swbmiss_task);
1521 vap->iv_swbmiss_count = 0;
1522 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period,
1523 ieee80211_swbmiss, vap);
1527 * Start an 802.11h channel switch. We record the parameters,
1528 * mark the operation pending, notify each vap through the
1529 * beacon update mechanism so it can update the beacon frame
1530 * contents, and then switch vap's to CSA state to block outbound
1531 * traffic. Devices that handle CSA directly can use the state
1532 * switch to do the right thing so long as they call
1533 * ieee80211_csa_completeswitch when it's time to complete the
1534 * channel change. Devices that depend on the net80211 layer can
1535 * use ieee80211_beacon_update to handle the countdown and the
1539 ieee80211_csa_startswitch(struct ieee80211com *ic,
1540 struct ieee80211_channel *c, int mode, int count)
1542 struct ieee80211vap *vap;
1544 IEEE80211_LOCK_ASSERT(ic);
1546 ic->ic_csa_newchan = c;
1547 ic->ic_csa_mode = mode;
1548 ic->ic_csa_count = count;
1549 ic->ic_flags |= IEEE80211_F_CSAPENDING;
1550 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1551 if (vap->iv_opmode == IEEE80211_M_HOSTAP ||
1552 vap->iv_opmode == IEEE80211_M_IBSS ||
1553 vap->iv_opmode == IEEE80211_M_MBSS)
1554 ieee80211_beacon_notify(vap, IEEE80211_BEACON_CSA);
1555 /* switch to CSA state to block outbound traffic */
1556 if (vap->iv_state == IEEE80211_S_RUN)
1557 ieee80211_new_state_locked(vap, IEEE80211_S_CSA, 0);
1559 ieee80211_notify_csa(ic, c, mode, count);
1563 * Complete the channel switch by transitioning all CSA VAPs to RUN.
1564 * This is called by both the completion and cancellation functions
1565 * so each VAP is placed back in the RUN state and can thus transmit.
1568 csa_completeswitch(struct ieee80211com *ic)
1570 struct ieee80211vap *vap;
1572 ic->ic_csa_newchan = NULL;
1573 ic->ic_flags &= ~IEEE80211_F_CSAPENDING;
1575 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1576 if (vap->iv_state == IEEE80211_S_CSA)
1577 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0);
1581 * Complete an 802.11h channel switch started by ieee80211_csa_startswitch.
1582 * We clear state and move all vap's in CSA state to RUN state
1583 * so they can again transmit.
1585 * Although this may not be completely correct, update the BSS channel
1586 * for each VAP to the newly configured channel. The setcurchan sets
1587 * the current operating channel for the interface (so the radio does
1588 * switch over) but the VAP BSS isn't updated, leading to incorrectly
1589 * reported information via ioctl.
1592 ieee80211_csa_completeswitch(struct ieee80211com *ic)
1594 struct ieee80211vap *vap;
1596 IEEE80211_LOCK_ASSERT(ic);
1598 KASSERT(ic->ic_flags & IEEE80211_F_CSAPENDING, ("csa not pending"));
1600 ieee80211_setcurchan(ic, ic->ic_csa_newchan);
1601 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1602 if (vap->iv_state == IEEE80211_S_CSA)
1603 vap->iv_bss->ni_chan = ic->ic_curchan;
1605 csa_completeswitch(ic);
1609 * Cancel an 802.11h channel switch started by ieee80211_csa_startswitch.
1610 * We clear state and move all vap's in CSA state to RUN state
1611 * so they can again transmit.
1614 ieee80211_csa_cancelswitch(struct ieee80211com *ic)
1616 IEEE80211_LOCK_ASSERT(ic);
1618 csa_completeswitch(ic);
1622 * Complete a DFS CAC started by ieee80211_dfs_cac_start.
1623 * We clear state and move all vap's in CAC state to RUN state.
1626 ieee80211_cac_completeswitch(struct ieee80211vap *vap0)
1628 struct ieee80211com *ic = vap0->iv_ic;
1629 struct ieee80211vap *vap;
1633 * Complete CAC state change for lead vap first; then
1634 * clock all the other vap's waiting.
1636 KASSERT(vap0->iv_state == IEEE80211_S_CAC,
1637 ("wrong state %d", vap0->iv_state));
1638 ieee80211_new_state_locked(vap0, IEEE80211_S_RUN, 0);
1640 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1641 if (vap->iv_state == IEEE80211_S_CAC)
1642 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0);
1643 IEEE80211_UNLOCK(ic);
1647 * Force all vap's other than the specified vap to the INIT state
1648 * and mark them as waiting for a scan to complete. These vaps
1649 * will be brought up when the scan completes and the scanning vap
1650 * reaches RUN state by wakeupwaiting.
1653 markwaiting(struct ieee80211vap *vap0)
1655 struct ieee80211com *ic = vap0->iv_ic;
1656 struct ieee80211vap *vap;
1658 IEEE80211_LOCK_ASSERT(ic);
1661 * A vap list entry can not disappear since we are running on the
1662 * taskqueue and a vap destroy will queue and drain another state
1665 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1668 if (vap->iv_state != IEEE80211_S_INIT) {
1669 /* NB: iv_newstate may drop the lock */
1670 vap->iv_newstate(vap, IEEE80211_S_INIT, 0);
1671 IEEE80211_LOCK_ASSERT(ic);
1672 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT;
1678 * Wakeup all vap's waiting for a scan to complete. This is the
1679 * companion to markwaiting (above) and is used to coordinate
1680 * multiple vaps scanning.
1681 * This is called from the state taskqueue.
1684 wakeupwaiting(struct ieee80211vap *vap0)
1686 struct ieee80211com *ic = vap0->iv_ic;
1687 struct ieee80211vap *vap;
1689 IEEE80211_LOCK_ASSERT(ic);
1692 * A vap list entry can not disappear since we are running on the
1693 * taskqueue and a vap destroy will queue and drain another state
1696 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1699 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANWAIT) {
1700 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT;
1701 /* NB: sta's cannot go INIT->RUN */
1702 /* NB: iv_newstate may drop the lock */
1703 vap->iv_newstate(vap,
1704 vap->iv_opmode == IEEE80211_M_STA ?
1705 IEEE80211_S_SCAN : IEEE80211_S_RUN, 0);
1706 IEEE80211_LOCK_ASSERT(ic);
1712 * Handle post state change work common to all operating modes.
1715 ieee80211_newstate_cb(void *xvap, int npending)
1717 struct ieee80211vap *vap = xvap;
1718 struct ieee80211com *ic = vap->iv_ic;
1719 enum ieee80211_state nstate, ostate;
1723 nstate = vap->iv_nstate;
1724 arg = vap->iv_nstate_arg;
1726 if (vap->iv_flags_ext & IEEE80211_FEXT_REINIT) {
1728 * We have been requested to drop back to the INIT before
1729 * proceeding to the new state.
1731 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1732 "%s: %s -> %s arg %d\n", __func__,
1733 ieee80211_state_name[vap->iv_state],
1734 ieee80211_state_name[IEEE80211_S_INIT], arg);
1735 vap->iv_newstate(vap, IEEE80211_S_INIT, arg);
1736 IEEE80211_LOCK_ASSERT(ic);
1737 vap->iv_flags_ext &= ~IEEE80211_FEXT_REINIT;
1740 ostate = vap->iv_state;
1741 if (nstate == IEEE80211_S_SCAN && ostate != IEEE80211_S_INIT) {
1743 * SCAN was forced; e.g. on beacon miss. Force other running
1744 * vap's to INIT state and mark them as waiting for the scan to
1745 * complete. This insures they don't interfere with our
1746 * scanning. Since we are single threaded the vaps can not
1747 * transition again while we are executing.
1749 * XXX not always right, assumes ap follows sta
1753 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1754 "%s: %s -> %s arg %d\n", __func__,
1755 ieee80211_state_name[ostate], ieee80211_state_name[nstate], arg);
1757 rc = vap->iv_newstate(vap, nstate, arg);
1758 IEEE80211_LOCK_ASSERT(ic);
1759 vap->iv_flags_ext &= ~IEEE80211_FEXT_STATEWAIT;
1761 /* State transition failed */
1762 KASSERT(rc != EINPROGRESS, ("iv_newstate was deferred"));
1763 KASSERT(nstate != IEEE80211_S_INIT,
1764 ("INIT state change failed"));
1765 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1766 "%s: %s returned error %d\n", __func__,
1767 ieee80211_state_name[nstate], rc);
1771 /* No actual transition, skip post processing */
1772 if (ostate == nstate)
1775 if (nstate == IEEE80211_S_RUN) {
1777 * OACTIVE may be set on the vap if the upper layer
1778 * tried to transmit (e.g. IPv6 NDP) before we reach
1779 * RUN state. Clear it and restart xmit.
1781 * Note this can also happen as a result of SLEEP->RUN
1782 * (i.e. coming out of power save mode).
1784 vap->iv_ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
1787 * XXX TODO Kick-start a VAP queue - this should be a method!
1790 /* bring up any vaps waiting on us */
1792 } else if (nstate == IEEE80211_S_INIT) {
1794 * Flush the scan cache if we did the last scan (XXX?)
1795 * and flush any frames on send queues from this vap.
1796 * Note the mgt q is used only for legacy drivers and
1797 * will go away shortly.
1799 ieee80211_scan_flush(vap);
1802 * XXX TODO: ic/vap queue flush
1806 IEEE80211_UNLOCK(ic);
1810 * Public interface for initiating a state machine change.
1811 * This routine single-threads the request and coordinates
1812 * the scheduling of multiple vaps for the purpose of selecting
1813 * an operating channel. Specifically the following scenarios
1815 * o only one vap can be selecting a channel so on transition to
1816 * SCAN state if another vap is already scanning then
1817 * mark the caller for later processing and return without
1818 * doing anything (XXX? expectations by caller of synchronous operation)
1819 * o only one vap can be doing CAC of a channel so on transition to
1820 * CAC state if another vap is already scanning for radar then
1821 * mark the caller for later processing and return without
1822 * doing anything (XXX? expectations by caller of synchronous operation)
1823 * o if another vap is already running when a request is made
1824 * to SCAN then an operating channel has been chosen; bypass
1825 * the scan and just join the channel
1827 * Note that the state change call is done through the iv_newstate
1828 * method pointer so any driver routine gets invoked. The driver
1829 * will normally call back into operating mode-specific
1830 * ieee80211_newstate routines (below) unless it needs to completely
1831 * bypass the state machine (e.g. because the firmware has it's
1832 * own idea how things should work). Bypassing the net80211 layer
1833 * is usually a mistake and indicates lack of proper integration
1834 * with the net80211 layer.
1837 ieee80211_new_state_locked(struct ieee80211vap *vap,
1838 enum ieee80211_state nstate, int arg)
1840 struct ieee80211com *ic = vap->iv_ic;
1841 struct ieee80211vap *vp;
1842 enum ieee80211_state ostate;
1843 int nrunning, nscanning;
1845 IEEE80211_LOCK_ASSERT(ic);
1847 if (vap->iv_flags_ext & IEEE80211_FEXT_STATEWAIT) {
1848 if (vap->iv_nstate == IEEE80211_S_INIT) {
1850 * XXX The vap is being stopped, do no allow any other
1851 * state changes until this is completed.
1854 } else if (vap->iv_state != vap->iv_nstate) {
1856 /* Warn if the previous state hasn't completed. */
1857 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1858 "%s: pending %s -> %s transition lost\n", __func__,
1859 ieee80211_state_name[vap->iv_state],
1860 ieee80211_state_name[vap->iv_nstate]);
1862 /* XXX temporarily enable to identify issues */
1863 if_printf(vap->iv_ifp,
1864 "%s: pending %s -> %s transition lost\n",
1865 __func__, ieee80211_state_name[vap->iv_state],
1866 ieee80211_state_name[vap->iv_nstate]);
1871 nrunning = nscanning = 0;
1872 /* XXX can track this state instead of calculating */
1873 TAILQ_FOREACH(vp, &ic->ic_vaps, iv_next) {
1875 if (vp->iv_state >= IEEE80211_S_RUN)
1877 /* XXX doesn't handle bg scan */
1878 /* NB: CAC+AUTH+ASSOC treated like SCAN */
1879 else if (vp->iv_state > IEEE80211_S_INIT)
1883 ostate = vap->iv_state;
1884 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1885 "%s: %s -> %s (nrunning %d nscanning %d)\n", __func__,
1886 ieee80211_state_name[ostate], ieee80211_state_name[nstate],
1887 nrunning, nscanning);
1889 case IEEE80211_S_SCAN:
1890 if (ostate == IEEE80211_S_INIT) {
1892 * INIT -> SCAN happens on initial bringup.
1894 KASSERT(!(nscanning && nrunning),
1895 ("%d scanning and %d running", nscanning, nrunning));
1898 * Someone is scanning, defer our state
1899 * change until the work has completed.
1901 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1902 "%s: defer %s -> %s\n",
1903 __func__, ieee80211_state_name[ostate],
1904 ieee80211_state_name[nstate]);
1905 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT;
1910 * Someone is operating; just join the channel
1914 /* XXX check each opmode, adhoc? */
1915 if (vap->iv_opmode == IEEE80211_M_STA)
1916 nstate = IEEE80211_S_SCAN;
1918 nstate = IEEE80211_S_RUN;
1919 #ifdef IEEE80211_DEBUG
1920 if (nstate != IEEE80211_S_SCAN) {
1921 IEEE80211_DPRINTF(vap,
1922 IEEE80211_MSG_STATE,
1923 "%s: override, now %s -> %s\n",
1925 ieee80211_state_name[ostate],
1926 ieee80211_state_name[nstate]);
1932 case IEEE80211_S_RUN:
1933 if (vap->iv_opmode == IEEE80211_M_WDS &&
1934 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) &&
1937 * Legacy WDS with someone else scanning; don't
1938 * go online until that completes as we should
1939 * follow the other vap to the channel they choose.
1941 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1942 "%s: defer %s -> %s (legacy WDS)\n", __func__,
1943 ieee80211_state_name[ostate],
1944 ieee80211_state_name[nstate]);
1945 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT;
1948 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
1949 IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) &&
1950 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) &&
1951 !IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) {
1953 * This is a DFS channel, transition to CAC state
1954 * instead of RUN. This allows us to initiate
1955 * Channel Availability Check (CAC) as specified
1958 nstate = IEEE80211_S_CAC;
1959 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1960 "%s: override %s -> %s (DFS)\n", __func__,
1961 ieee80211_state_name[ostate],
1962 ieee80211_state_name[nstate]);
1965 case IEEE80211_S_INIT:
1966 /* cancel any scan in progress */
1967 ieee80211_cancel_scan(vap);
1968 if (ostate == IEEE80211_S_INIT ) {
1969 /* XXX don't believe this */
1970 /* INIT -> INIT. nothing to do */
1971 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT;
1977 /* defer the state change to a thread */
1978 vap->iv_nstate = nstate;
1979 vap->iv_nstate_arg = arg;
1980 vap->iv_flags_ext |= IEEE80211_FEXT_STATEWAIT;
1981 ieee80211_runtask(ic, &vap->iv_nstate_task);
1986 ieee80211_new_state(struct ieee80211vap *vap,
1987 enum ieee80211_state nstate, int arg)
1989 struct ieee80211com *ic = vap->iv_ic;
1993 rc = ieee80211_new_state_locked(vap, nstate, arg);
1994 IEEE80211_UNLOCK(ic);