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)
117 ic_printf(ni->ni_ic, "missing ic_raw_xmit callback, drop frame\n");
123 ieee80211_proto_attach(struct ieee80211com *ic)
127 /* override the 802.3 setting */
128 hdrlen = ic->ic_headroom
129 + sizeof(struct ieee80211_qosframe_addr4)
130 + IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN
131 + IEEE80211_WEP_EXTIVLEN;
132 /* XXX no way to recalculate on ifdetach */
133 if (ALIGN(hdrlen) > max_linkhdr) {
134 /* XXX sanity check... */
135 max_linkhdr = ALIGN(hdrlen);
136 max_hdr = max_linkhdr + max_protohdr;
137 max_datalen = MHLEN - max_hdr;
139 ic->ic_protmode = IEEE80211_PROT_CTSONLY;
141 TASK_INIT(&ic->ic_parent_task, 0, parent_updown, ic);
142 TASK_INIT(&ic->ic_mcast_task, 0, update_mcast, ic);
143 TASK_INIT(&ic->ic_promisc_task, 0, update_promisc, ic);
144 TASK_INIT(&ic->ic_chan_task, 0, update_channel, ic);
145 TASK_INIT(&ic->ic_bmiss_task, 0, beacon_miss, ic);
146 TASK_INIT(&ic->ic_chw_task, 0, update_chw, ic);
148 ic->ic_wme.wme_hipri_switch_hysteresis =
149 AGGRESSIVE_MODE_SWITCH_HYSTERESIS;
151 /* initialize management frame handlers */
152 ic->ic_send_mgmt = ieee80211_send_mgmt;
153 ic->ic_raw_xmit = null_raw_xmit;
155 ieee80211_adhoc_attach(ic);
156 ieee80211_sta_attach(ic);
157 ieee80211_wds_attach(ic);
158 ieee80211_hostap_attach(ic);
159 #ifdef IEEE80211_SUPPORT_MESH
160 ieee80211_mesh_attach(ic);
162 ieee80211_monitor_attach(ic);
166 ieee80211_proto_detach(struct ieee80211com *ic)
168 ieee80211_monitor_detach(ic);
169 #ifdef IEEE80211_SUPPORT_MESH
170 ieee80211_mesh_detach(ic);
172 ieee80211_hostap_detach(ic);
173 ieee80211_wds_detach(ic);
174 ieee80211_adhoc_detach(ic);
175 ieee80211_sta_detach(ic);
179 null_update_beacon(struct ieee80211vap *vap, int item)
184 ieee80211_proto_vattach(struct ieee80211vap *vap)
186 struct ieee80211com *ic = vap->iv_ic;
187 struct ifnet *ifp = vap->iv_ifp;
190 /* override the 802.3 setting */
191 ifp->if_hdrlen = ic->ic_headroom
192 + sizeof(struct ieee80211_qosframe_addr4)
193 + IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN
194 + IEEE80211_WEP_EXTIVLEN;
196 vap->iv_rtsthreshold = IEEE80211_RTS_DEFAULT;
197 vap->iv_fragthreshold = IEEE80211_FRAG_DEFAULT;
198 vap->iv_bmiss_max = IEEE80211_BMISS_MAX;
199 callout_init_mtx(&vap->iv_swbmiss, IEEE80211_LOCK_OBJ(ic), 0);
200 callout_init(&vap->iv_mgtsend, 1);
201 TASK_INIT(&vap->iv_nstate_task, 0, ieee80211_newstate_cb, vap);
202 TASK_INIT(&vap->iv_swbmiss_task, 0, beacon_swmiss, vap);
204 * Install default tx rate handling: no fixed rate, lowest
205 * supported rate for mgmt and multicast frames. Default
206 * max retry count. These settings can be changed by the
207 * driver and/or user applications.
209 for (i = IEEE80211_MODE_11A; i < IEEE80211_MODE_MAX; i++) {
210 const struct ieee80211_rateset *rs = &ic->ic_sup_rates[i];
212 vap->iv_txparms[i].ucastrate = IEEE80211_FIXED_RATE_NONE;
215 * Setting the management rate to MCS 0 assumes that the
216 * BSS Basic rate set is empty and the BSS Basic MCS set
219 * Since we're not checking this, default to the lowest
220 * defined rate for this mode.
222 * At least one 11n AP (DLINK DIR-825) is reported to drop
223 * some MCS management traffic (eg BA response frames.)
225 * See also: 9.6.0 of the 802.11n-2009 specification.
228 if (i == IEEE80211_MODE_11NA || i == IEEE80211_MODE_11NG) {
229 vap->iv_txparms[i].mgmtrate = 0 | IEEE80211_RATE_MCS;
230 vap->iv_txparms[i].mcastrate = 0 | IEEE80211_RATE_MCS;
232 vap->iv_txparms[i].mgmtrate =
233 rs->rs_rates[0] & IEEE80211_RATE_VAL;
234 vap->iv_txparms[i].mcastrate =
235 rs->rs_rates[0] & IEEE80211_RATE_VAL;
238 vap->iv_txparms[i].mgmtrate = rs->rs_rates[0] & IEEE80211_RATE_VAL;
239 vap->iv_txparms[i].mcastrate = rs->rs_rates[0] & IEEE80211_RATE_VAL;
240 vap->iv_txparms[i].maxretry = IEEE80211_TXMAX_DEFAULT;
242 vap->iv_roaming = IEEE80211_ROAMING_AUTO;
244 vap->iv_update_beacon = null_update_beacon;
245 vap->iv_deliver_data = ieee80211_deliver_data;
247 /* attach support for operating mode */
248 ic->ic_vattach[vap->iv_opmode](vap);
252 ieee80211_proto_vdetach(struct ieee80211vap *vap)
254 #define FREEAPPIE(ie) do { \
256 IEEE80211_FREE(ie, M_80211_NODE_IE); \
259 * Detach operating mode module.
261 if (vap->iv_opdetach != NULL)
262 vap->iv_opdetach(vap);
264 * This should not be needed as we detach when reseting
265 * the state but be conservative here since the
266 * authenticator may do things like spawn kernel threads.
268 if (vap->iv_auth->ia_detach != NULL)
269 vap->iv_auth->ia_detach(vap);
271 * Detach any ACL'ator.
273 if (vap->iv_acl != NULL)
274 vap->iv_acl->iac_detach(vap);
276 FREEAPPIE(vap->iv_appie_beacon);
277 FREEAPPIE(vap->iv_appie_probereq);
278 FREEAPPIE(vap->iv_appie_proberesp);
279 FREEAPPIE(vap->iv_appie_assocreq);
280 FREEAPPIE(vap->iv_appie_assocresp);
281 FREEAPPIE(vap->iv_appie_wpa);
286 * Simple-minded authenticator module support.
289 #define IEEE80211_AUTH_MAX (IEEE80211_AUTH_WPA+1)
290 /* XXX well-known names */
291 static const char *auth_modnames[IEEE80211_AUTH_MAX] = {
292 "wlan_internal", /* IEEE80211_AUTH_NONE */
293 "wlan_internal", /* IEEE80211_AUTH_OPEN */
294 "wlan_internal", /* IEEE80211_AUTH_SHARED */
295 "wlan_xauth", /* IEEE80211_AUTH_8021X */
296 "wlan_internal", /* IEEE80211_AUTH_AUTO */
297 "wlan_xauth", /* IEEE80211_AUTH_WPA */
299 static const struct ieee80211_authenticator *authenticators[IEEE80211_AUTH_MAX];
301 static const struct ieee80211_authenticator auth_internal = {
302 .ia_name = "wlan_internal",
305 .ia_node_join = NULL,
306 .ia_node_leave = NULL,
310 * Setup internal authenticators once; they are never unregistered.
313 ieee80211_auth_setup(void)
315 ieee80211_authenticator_register(IEEE80211_AUTH_OPEN, &auth_internal);
316 ieee80211_authenticator_register(IEEE80211_AUTH_SHARED, &auth_internal);
317 ieee80211_authenticator_register(IEEE80211_AUTH_AUTO, &auth_internal);
319 SYSINIT(wlan_auth, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_auth_setup, NULL);
321 const struct ieee80211_authenticator *
322 ieee80211_authenticator_get(int auth)
324 if (auth >= IEEE80211_AUTH_MAX)
326 if (authenticators[auth] == NULL)
327 ieee80211_load_module(auth_modnames[auth]);
328 return authenticators[auth];
332 ieee80211_authenticator_register(int type,
333 const struct ieee80211_authenticator *auth)
335 if (type >= IEEE80211_AUTH_MAX)
337 authenticators[type] = auth;
341 ieee80211_authenticator_unregister(int type)
344 if (type >= IEEE80211_AUTH_MAX)
346 authenticators[type] = NULL;
350 * Very simple-minded ACL module support.
352 /* XXX just one for now */
353 static const struct ieee80211_aclator *acl = NULL;
356 ieee80211_aclator_register(const struct ieee80211_aclator *iac)
358 printf("wlan: %s acl policy registered\n", iac->iac_name);
363 ieee80211_aclator_unregister(const struct ieee80211_aclator *iac)
367 printf("wlan: %s acl policy unregistered\n", iac->iac_name);
370 const struct ieee80211_aclator *
371 ieee80211_aclator_get(const char *name)
374 ieee80211_load_module("wlan_acl");
375 return acl != NULL && strcmp(acl->iac_name, name) == 0 ? acl : NULL;
379 ieee80211_print_essid(const uint8_t *essid, int len)
384 if (len > IEEE80211_NWID_LEN)
385 len = IEEE80211_NWID_LEN;
386 /* determine printable or not */
387 for (i = 0, p = essid; i < len; i++, p++) {
388 if (*p < ' ' || *p > 0x7e)
393 for (i = 0, p = essid; i < len; i++, p++)
398 for (i = 0, p = essid; i < len; i++, p++)
404 ieee80211_dump_pkt(struct ieee80211com *ic,
405 const uint8_t *buf, int len, int rate, int rssi)
407 const struct ieee80211_frame *wh;
410 wh = (const struct ieee80211_frame *)buf;
411 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) {
412 case IEEE80211_FC1_DIR_NODS:
413 printf("NODS %s", ether_sprintf(wh->i_addr2));
414 printf("->%s", ether_sprintf(wh->i_addr1));
415 printf("(%s)", ether_sprintf(wh->i_addr3));
417 case IEEE80211_FC1_DIR_TODS:
418 printf("TODS %s", ether_sprintf(wh->i_addr2));
419 printf("->%s", ether_sprintf(wh->i_addr3));
420 printf("(%s)", ether_sprintf(wh->i_addr1));
422 case IEEE80211_FC1_DIR_FROMDS:
423 printf("FRDS %s", ether_sprintf(wh->i_addr3));
424 printf("->%s", ether_sprintf(wh->i_addr1));
425 printf("(%s)", ether_sprintf(wh->i_addr2));
427 case IEEE80211_FC1_DIR_DSTODS:
428 printf("DSDS %s", ether_sprintf((const uint8_t *)&wh[1]));
429 printf("->%s", ether_sprintf(wh->i_addr3));
430 printf("(%s", ether_sprintf(wh->i_addr2));
431 printf("->%s)", ether_sprintf(wh->i_addr1));
434 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) {
435 case IEEE80211_FC0_TYPE_DATA:
438 case IEEE80211_FC0_TYPE_MGT:
439 printf(" %s", ieee80211_mgt_subtype_name[
440 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK)
441 >> IEEE80211_FC0_SUBTYPE_SHIFT]);
444 printf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK);
447 if (IEEE80211_QOS_HAS_SEQ(wh)) {
448 const struct ieee80211_qosframe *qwh =
449 (const struct ieee80211_qosframe *)buf;
450 printf(" QoS [TID %u%s]", qwh->i_qos[0] & IEEE80211_QOS_TID,
451 qwh->i_qos[0] & IEEE80211_QOS_ACKPOLICY ? " ACM" : "");
453 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
456 off = ieee80211_anyhdrspace(ic, wh);
457 printf(" WEP [IV %.02x %.02x %.02x",
458 buf[off+0], buf[off+1], buf[off+2]);
459 if (buf[off+IEEE80211_WEP_IVLEN] & IEEE80211_WEP_EXTIV)
460 printf(" %.02x %.02x %.02x",
461 buf[off+4], buf[off+5], buf[off+6]);
462 printf(" KID %u]", buf[off+IEEE80211_WEP_IVLEN] >> 6);
465 printf(" %dM", rate / 2);
467 printf(" +%d", rssi);
470 for (i = 0; i < len; i++) {
473 printf("%02x", buf[i]);
480 findrix(const struct ieee80211_rateset *rs, int r)
484 for (i = 0; i < rs->rs_nrates; i++)
485 if ((rs->rs_rates[i] & IEEE80211_RATE_VAL) == r)
491 ieee80211_fix_rate(struct ieee80211_node *ni,
492 struct ieee80211_rateset *nrs, int flags)
494 #define RV(v) ((v) & IEEE80211_RATE_VAL)
495 struct ieee80211vap *vap = ni->ni_vap;
496 struct ieee80211com *ic = ni->ni_ic;
497 int i, j, rix, error;
498 int okrate, badrate, fixedrate, ucastrate;
499 const struct ieee80211_rateset *srs;
503 okrate = badrate = 0;
504 ucastrate = vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)].ucastrate;
505 if (ucastrate != IEEE80211_FIXED_RATE_NONE) {
507 * Workaround awkwardness with fixed rate. We are called
508 * to check both the legacy rate set and the HT rate set
509 * but we must apply any legacy fixed rate check only to the
510 * legacy rate set and vice versa. We cannot tell what type
511 * of rate set we've been given (legacy or HT) but we can
512 * distinguish the fixed rate type (MCS have 0x80 set).
513 * So to deal with this the caller communicates whether to
514 * check MCS or legacy rate using the flags and we use the
515 * type of any fixed rate to avoid applying an MCS to a
516 * legacy rate and vice versa.
518 if (ucastrate & 0x80) {
519 if (flags & IEEE80211_F_DOFRATE)
520 flags &= ~IEEE80211_F_DOFRATE;
521 } else if ((ucastrate & 0x80) == 0) {
522 if (flags & IEEE80211_F_DOFMCS)
523 flags &= ~IEEE80211_F_DOFMCS;
525 /* NB: required to make MCS match below work */
526 ucastrate &= IEEE80211_RATE_VAL;
528 fixedrate = IEEE80211_FIXED_RATE_NONE;
530 * XXX we are called to process both MCS and legacy rates;
531 * we must use the appropriate basic rate set or chaos will
532 * ensue; for now callers that want MCS must supply
533 * IEEE80211_F_DOBRS; at some point we'll need to split this
534 * function so there are two variants, one for MCS and one
537 if (flags & IEEE80211_F_DOBRS)
538 srs = (const struct ieee80211_rateset *)
539 ieee80211_get_suphtrates(ic, ni->ni_chan);
541 srs = ieee80211_get_suprates(ic, ni->ni_chan);
542 for (i = 0; i < nrs->rs_nrates; ) {
543 if (flags & IEEE80211_F_DOSORT) {
547 for (j = i + 1; j < nrs->rs_nrates; j++) {
548 if (RV(nrs->rs_rates[i]) > RV(nrs->rs_rates[j])) {
549 r = nrs->rs_rates[i];
550 nrs->rs_rates[i] = nrs->rs_rates[j];
551 nrs->rs_rates[j] = r;
555 r = nrs->rs_rates[i] & IEEE80211_RATE_VAL;
558 * Check for fixed rate.
563 * Check against supported rates.
565 rix = findrix(srs, r);
566 if (flags & IEEE80211_F_DONEGO) {
569 * A rate in the node's rate set is not
570 * supported. If this is a basic rate and we
571 * are operating as a STA then this is an error.
572 * Otherwise we just discard/ignore the rate.
574 if ((flags & IEEE80211_F_JOIN) &&
575 (nrs->rs_rates[i] & IEEE80211_RATE_BASIC))
577 } else if ((flags & IEEE80211_F_JOIN) == 0) {
579 * Overwrite with the supported rate
580 * value so any basic rate bit is set.
582 nrs->rs_rates[i] = srs->rs_rates[rix];
585 if ((flags & IEEE80211_F_DODEL) && rix < 0) {
587 * Delete unacceptable rates.
590 for (j = i; j < nrs->rs_nrates; j++)
591 nrs->rs_rates[j] = nrs->rs_rates[j + 1];
592 nrs->rs_rates[j] = 0;
596 okrate = nrs->rs_rates[i];
599 if (okrate == 0 || error != 0 ||
600 ((flags & (IEEE80211_F_DOFRATE|IEEE80211_F_DOFMCS)) &&
601 fixedrate != ucastrate)) {
602 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni,
603 "%s: flags 0x%x okrate %d error %d fixedrate 0x%x "
604 "ucastrate %x\n", __func__, fixedrate, ucastrate, flags);
605 return badrate | IEEE80211_RATE_BASIC;
612 * Reset 11g-related state.
615 ieee80211_reset_erp(struct ieee80211com *ic)
617 ic->ic_flags &= ~IEEE80211_F_USEPROT;
618 ic->ic_nonerpsta = 0;
619 ic->ic_longslotsta = 0;
621 * Short slot time is enabled only when operating in 11g
622 * and not in an IBSS. We must also honor whether or not
623 * the driver is capable of doing it.
625 ieee80211_set_shortslottime(ic,
626 IEEE80211_IS_CHAN_A(ic->ic_curchan) ||
627 IEEE80211_IS_CHAN_HT(ic->ic_curchan) ||
628 (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
629 ic->ic_opmode == IEEE80211_M_HOSTAP &&
630 (ic->ic_caps & IEEE80211_C_SHSLOT)));
632 * Set short preamble and ERP barker-preamble flags.
634 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) ||
635 (ic->ic_caps & IEEE80211_C_SHPREAMBLE)) {
636 ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
637 ic->ic_flags &= ~IEEE80211_F_USEBARKER;
639 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
640 ic->ic_flags |= IEEE80211_F_USEBARKER;
645 * Set the short slot time state and notify the driver.
648 ieee80211_set_shortslottime(struct ieee80211com *ic, int onoff)
651 ic->ic_flags |= IEEE80211_F_SHSLOT;
653 ic->ic_flags &= ~IEEE80211_F_SHSLOT;
655 if (ic->ic_updateslot != NULL)
656 ic->ic_updateslot(ic);
660 * Check if the specified rate set supports ERP.
661 * NB: the rate set is assumed to be sorted.
664 ieee80211_iserp_rateset(const struct ieee80211_rateset *rs)
666 static const int rates[] = { 2, 4, 11, 22, 12, 24, 48 };
669 if (rs->rs_nrates < nitems(rates))
671 for (i = 0; i < nitems(rates); i++) {
672 for (j = 0; j < rs->rs_nrates; j++) {
673 int r = rs->rs_rates[j] & IEEE80211_RATE_VAL;
687 * Mark the basic rates for the rate table based on the
688 * operating mode. For real 11g we mark all the 11b rates
689 * and 6, 12, and 24 OFDM. For 11b compatibility we mark only
690 * 11b rates. There's also a pseudo 11a-mode used to mark only
691 * the basic OFDM rates.
694 setbasicrates(struct ieee80211_rateset *rs,
695 enum ieee80211_phymode mode, int add)
697 static const struct ieee80211_rateset basic[IEEE80211_MODE_MAX] = {
698 [IEEE80211_MODE_11A] = { 3, { 12, 24, 48 } },
699 [IEEE80211_MODE_11B] = { 2, { 2, 4 } },
701 [IEEE80211_MODE_11G] = { 4, { 2, 4, 11, 22 } },
702 [IEEE80211_MODE_TURBO_A] = { 3, { 12, 24, 48 } },
703 [IEEE80211_MODE_TURBO_G] = { 4, { 2, 4, 11, 22 } },
704 [IEEE80211_MODE_STURBO_A] = { 3, { 12, 24, 48 } },
705 [IEEE80211_MODE_HALF] = { 3, { 6, 12, 24 } },
706 [IEEE80211_MODE_QUARTER] = { 3, { 3, 6, 12 } },
707 [IEEE80211_MODE_11NA] = { 3, { 12, 24, 48 } },
709 [IEEE80211_MODE_11NG] = { 4, { 2, 4, 11, 22 } },
713 for (i = 0; i < rs->rs_nrates; i++) {
715 rs->rs_rates[i] &= IEEE80211_RATE_VAL;
716 for (j = 0; j < basic[mode].rs_nrates; j++)
717 if (basic[mode].rs_rates[j] == rs->rs_rates[i]) {
718 rs->rs_rates[i] |= IEEE80211_RATE_BASIC;
725 * Set the basic rates in a rate set.
728 ieee80211_setbasicrates(struct ieee80211_rateset *rs,
729 enum ieee80211_phymode mode)
731 setbasicrates(rs, mode, 0);
735 * Add basic rates to a rate set.
738 ieee80211_addbasicrates(struct ieee80211_rateset *rs,
739 enum ieee80211_phymode mode)
741 setbasicrates(rs, mode, 1);
745 * WME protocol support.
747 * The default 11a/b/g/n parameters come from the WiFi Alliance WMM
748 * System Interopability Test Plan (v1.4, Appendix F) and the 802.11n
749 * Draft 2.0 Test Plan (Appendix D).
751 * Static/Dynamic Turbo mode settings come from Atheros.
753 typedef struct phyParamType {
761 static const struct phyParamType phyParamForAC_BE[IEEE80211_MODE_MAX] = {
762 [IEEE80211_MODE_AUTO] = { 3, 4, 6, 0, 0 },
763 [IEEE80211_MODE_11A] = { 3, 4, 6, 0, 0 },
764 [IEEE80211_MODE_11B] = { 3, 4, 6, 0, 0 },
765 [IEEE80211_MODE_11G] = { 3, 4, 6, 0, 0 },
766 [IEEE80211_MODE_FH] = { 3, 4, 6, 0, 0 },
767 [IEEE80211_MODE_TURBO_A]= { 2, 3, 5, 0, 0 },
768 [IEEE80211_MODE_TURBO_G]= { 2, 3, 5, 0, 0 },
769 [IEEE80211_MODE_STURBO_A]={ 2, 3, 5, 0, 0 },
770 [IEEE80211_MODE_HALF] = { 3, 4, 6, 0, 0 },
771 [IEEE80211_MODE_QUARTER]= { 3, 4, 6, 0, 0 },
772 [IEEE80211_MODE_11NA] = { 3, 4, 6, 0, 0 },
773 [IEEE80211_MODE_11NG] = { 3, 4, 6, 0, 0 },
775 static const struct phyParamType phyParamForAC_BK[IEEE80211_MODE_MAX] = {
776 [IEEE80211_MODE_AUTO] = { 7, 4, 10, 0, 0 },
777 [IEEE80211_MODE_11A] = { 7, 4, 10, 0, 0 },
778 [IEEE80211_MODE_11B] = { 7, 4, 10, 0, 0 },
779 [IEEE80211_MODE_11G] = { 7, 4, 10, 0, 0 },
780 [IEEE80211_MODE_FH] = { 7, 4, 10, 0, 0 },
781 [IEEE80211_MODE_TURBO_A]= { 7, 3, 10, 0, 0 },
782 [IEEE80211_MODE_TURBO_G]= { 7, 3, 10, 0, 0 },
783 [IEEE80211_MODE_STURBO_A]={ 7, 3, 10, 0, 0 },
784 [IEEE80211_MODE_HALF] = { 7, 4, 10, 0, 0 },
785 [IEEE80211_MODE_QUARTER]= { 7, 4, 10, 0, 0 },
786 [IEEE80211_MODE_11NA] = { 7, 4, 10, 0, 0 },
787 [IEEE80211_MODE_11NG] = { 7, 4, 10, 0, 0 },
789 static const struct phyParamType phyParamForAC_VI[IEEE80211_MODE_MAX] = {
790 [IEEE80211_MODE_AUTO] = { 1, 3, 4, 94, 0 },
791 [IEEE80211_MODE_11A] = { 1, 3, 4, 94, 0 },
792 [IEEE80211_MODE_11B] = { 1, 3, 4, 188, 0 },
793 [IEEE80211_MODE_11G] = { 1, 3, 4, 94, 0 },
794 [IEEE80211_MODE_FH] = { 1, 3, 4, 188, 0 },
795 [IEEE80211_MODE_TURBO_A]= { 1, 2, 3, 94, 0 },
796 [IEEE80211_MODE_TURBO_G]= { 1, 2, 3, 94, 0 },
797 [IEEE80211_MODE_STURBO_A]={ 1, 2, 3, 94, 0 },
798 [IEEE80211_MODE_HALF] = { 1, 3, 4, 94, 0 },
799 [IEEE80211_MODE_QUARTER]= { 1, 3, 4, 94, 0 },
800 [IEEE80211_MODE_11NA] = { 1, 3, 4, 94, 0 },
801 [IEEE80211_MODE_11NG] = { 1, 3, 4, 94, 0 },
803 static const struct phyParamType phyParamForAC_VO[IEEE80211_MODE_MAX] = {
804 [IEEE80211_MODE_AUTO] = { 1, 2, 3, 47, 0 },
805 [IEEE80211_MODE_11A] = { 1, 2, 3, 47, 0 },
806 [IEEE80211_MODE_11B] = { 1, 2, 3, 102, 0 },
807 [IEEE80211_MODE_11G] = { 1, 2, 3, 47, 0 },
808 [IEEE80211_MODE_FH] = { 1, 2, 3, 102, 0 },
809 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 },
810 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 },
811 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 },
812 [IEEE80211_MODE_HALF] = { 1, 2, 3, 47, 0 },
813 [IEEE80211_MODE_QUARTER]= { 1, 2, 3, 47, 0 },
814 [IEEE80211_MODE_11NA] = { 1, 2, 3, 47, 0 },
815 [IEEE80211_MODE_11NG] = { 1, 2, 3, 47, 0 },
818 static const struct phyParamType bssPhyParamForAC_BE[IEEE80211_MODE_MAX] = {
819 [IEEE80211_MODE_AUTO] = { 3, 4, 10, 0, 0 },
820 [IEEE80211_MODE_11A] = { 3, 4, 10, 0, 0 },
821 [IEEE80211_MODE_11B] = { 3, 4, 10, 0, 0 },
822 [IEEE80211_MODE_11G] = { 3, 4, 10, 0, 0 },
823 [IEEE80211_MODE_FH] = { 3, 4, 10, 0, 0 },
824 [IEEE80211_MODE_TURBO_A]= { 2, 3, 10, 0, 0 },
825 [IEEE80211_MODE_TURBO_G]= { 2, 3, 10, 0, 0 },
826 [IEEE80211_MODE_STURBO_A]={ 2, 3, 10, 0, 0 },
827 [IEEE80211_MODE_HALF] = { 3, 4, 10, 0, 0 },
828 [IEEE80211_MODE_QUARTER]= { 3, 4, 10, 0, 0 },
829 [IEEE80211_MODE_11NA] = { 3, 4, 10, 0, 0 },
830 [IEEE80211_MODE_11NG] = { 3, 4, 10, 0, 0 },
832 static const struct phyParamType bssPhyParamForAC_VI[IEEE80211_MODE_MAX] = {
833 [IEEE80211_MODE_AUTO] = { 2, 3, 4, 94, 0 },
834 [IEEE80211_MODE_11A] = { 2, 3, 4, 94, 0 },
835 [IEEE80211_MODE_11B] = { 2, 3, 4, 188, 0 },
836 [IEEE80211_MODE_11G] = { 2, 3, 4, 94, 0 },
837 [IEEE80211_MODE_FH] = { 2, 3, 4, 188, 0 },
838 [IEEE80211_MODE_TURBO_A]= { 2, 2, 3, 94, 0 },
839 [IEEE80211_MODE_TURBO_G]= { 2, 2, 3, 94, 0 },
840 [IEEE80211_MODE_STURBO_A]={ 2, 2, 3, 94, 0 },
841 [IEEE80211_MODE_HALF] = { 2, 3, 4, 94, 0 },
842 [IEEE80211_MODE_QUARTER]= { 2, 3, 4, 94, 0 },
843 [IEEE80211_MODE_11NA] = { 2, 3, 4, 94, 0 },
844 [IEEE80211_MODE_11NG] = { 2, 3, 4, 94, 0 },
846 static const struct phyParamType bssPhyParamForAC_VO[IEEE80211_MODE_MAX] = {
847 [IEEE80211_MODE_AUTO] = { 2, 2, 3, 47, 0 },
848 [IEEE80211_MODE_11A] = { 2, 2, 3, 47, 0 },
849 [IEEE80211_MODE_11B] = { 2, 2, 3, 102, 0 },
850 [IEEE80211_MODE_11G] = { 2, 2, 3, 47, 0 },
851 [IEEE80211_MODE_FH] = { 2, 2, 3, 102, 0 },
852 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 },
853 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 },
854 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 },
855 [IEEE80211_MODE_HALF] = { 2, 2, 3, 47, 0 },
856 [IEEE80211_MODE_QUARTER]= { 2, 2, 3, 47, 0 },
857 [IEEE80211_MODE_11NA] = { 2, 2, 3, 47, 0 },
858 [IEEE80211_MODE_11NG] = { 2, 2, 3, 47, 0 },
862 _setifsparams(struct wmeParams *wmep, const paramType *phy)
864 wmep->wmep_aifsn = phy->aifsn;
865 wmep->wmep_logcwmin = phy->logcwmin;
866 wmep->wmep_logcwmax = phy->logcwmax;
867 wmep->wmep_txopLimit = phy->txopLimit;
871 setwmeparams(struct ieee80211vap *vap, const char *type, int ac,
872 struct wmeParams *wmep, const paramType *phy)
874 wmep->wmep_acm = phy->acm;
875 _setifsparams(wmep, phy);
877 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
878 "set %s (%s) [acm %u aifsn %u logcwmin %u logcwmax %u txop %u]\n",
879 ieee80211_wme_acnames[ac], type,
880 wmep->wmep_acm, wmep->wmep_aifsn, wmep->wmep_logcwmin,
881 wmep->wmep_logcwmax, wmep->wmep_txopLimit);
885 ieee80211_wme_initparams_locked(struct ieee80211vap *vap)
887 struct ieee80211com *ic = vap->iv_ic;
888 struct ieee80211_wme_state *wme = &ic->ic_wme;
889 const paramType *pPhyParam, *pBssPhyParam;
890 struct wmeParams *wmep;
891 enum ieee80211_phymode mode;
894 IEEE80211_LOCK_ASSERT(ic);
896 if ((ic->ic_caps & IEEE80211_C_WME) == 0 || ic->ic_nrunning > 1)
900 * Clear the wme cap_info field so a qoscount from a previous
901 * vap doesn't confuse later code which only parses the beacon
902 * field and updates hardware when said field changes.
903 * Otherwise the hardware is programmed with defaults, not what
904 * the beacon actually announces.
906 wme->wme_wmeChanParams.cap_info = 0;
909 * Select mode; we can be called early in which case we
910 * always use auto mode. We know we'll be called when
911 * entering the RUN state with bsschan setup properly
912 * so state will eventually get set correctly
914 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC)
915 mode = ieee80211_chan2mode(ic->ic_bsschan);
917 mode = IEEE80211_MODE_AUTO;
918 for (i = 0; i < WME_NUM_AC; i++) {
921 pPhyParam = &phyParamForAC_BK[mode];
922 pBssPhyParam = &phyParamForAC_BK[mode];
925 pPhyParam = &phyParamForAC_VI[mode];
926 pBssPhyParam = &bssPhyParamForAC_VI[mode];
929 pPhyParam = &phyParamForAC_VO[mode];
930 pBssPhyParam = &bssPhyParamForAC_VO[mode];
934 pPhyParam = &phyParamForAC_BE[mode];
935 pBssPhyParam = &bssPhyParamForAC_BE[mode];
938 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i];
939 if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
940 setwmeparams(vap, "chan", i, wmep, pPhyParam);
942 setwmeparams(vap, "chan", i, wmep, pBssPhyParam);
944 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i];
945 setwmeparams(vap, "bss ", i, wmep, pBssPhyParam);
947 /* NB: check ic_bss to avoid NULL deref on initial attach */
948 if (vap->iv_bss != NULL) {
950 * Calculate agressive mode switching threshold based
951 * on beacon interval. This doesn't need locking since
952 * we're only called before entering the RUN state at
953 * which point we start sending beacon frames.
955 wme->wme_hipri_switch_thresh =
956 (HIGH_PRI_SWITCH_THRESH * vap->iv_bss->ni_intval) / 100;
957 wme->wme_flags &= ~WME_F_AGGRMODE;
958 ieee80211_wme_updateparams(vap);
963 ieee80211_wme_initparams(struct ieee80211vap *vap)
965 struct ieee80211com *ic = vap->iv_ic;
968 ieee80211_wme_initparams_locked(vap);
969 IEEE80211_UNLOCK(ic);
973 * Update WME parameters for ourself and the BSS.
976 ieee80211_wme_updateparams_locked(struct ieee80211vap *vap)
978 static const paramType aggrParam[IEEE80211_MODE_MAX] = {
979 [IEEE80211_MODE_AUTO] = { 2, 4, 10, 64, 0 },
980 [IEEE80211_MODE_11A] = { 2, 4, 10, 64, 0 },
981 [IEEE80211_MODE_11B] = { 2, 5, 10, 64, 0 },
982 [IEEE80211_MODE_11G] = { 2, 4, 10, 64, 0 },
983 [IEEE80211_MODE_FH] = { 2, 5, 10, 64, 0 },
984 [IEEE80211_MODE_TURBO_A] = { 1, 3, 10, 64, 0 },
985 [IEEE80211_MODE_TURBO_G] = { 1, 3, 10, 64, 0 },
986 [IEEE80211_MODE_STURBO_A] = { 1, 3, 10, 64, 0 },
987 [IEEE80211_MODE_HALF] = { 2, 4, 10, 64, 0 },
988 [IEEE80211_MODE_QUARTER] = { 2, 4, 10, 64, 0 },
989 [IEEE80211_MODE_11NA] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/
990 [IEEE80211_MODE_11NG] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/
992 struct ieee80211com *ic = vap->iv_ic;
993 struct ieee80211_wme_state *wme = &ic->ic_wme;
994 const struct wmeParams *wmep;
995 struct wmeParams *chanp, *bssp;
996 enum ieee80211_phymode mode;
1001 * Set up the channel access parameters for the physical
1002 * device. First populate the configured settings.
1004 for (i = 0; i < WME_NUM_AC; i++) {
1005 chanp = &wme->wme_chanParams.cap_wmeParams[i];
1006 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i];
1007 chanp->wmep_aifsn = wmep->wmep_aifsn;
1008 chanp->wmep_logcwmin = wmep->wmep_logcwmin;
1009 chanp->wmep_logcwmax = wmep->wmep_logcwmax;
1010 chanp->wmep_txopLimit = wmep->wmep_txopLimit;
1012 chanp = &wme->wme_bssChanParams.cap_wmeParams[i];
1013 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i];
1014 chanp->wmep_aifsn = wmep->wmep_aifsn;
1015 chanp->wmep_logcwmin = wmep->wmep_logcwmin;
1016 chanp->wmep_logcwmax = wmep->wmep_logcwmax;
1017 chanp->wmep_txopLimit = wmep->wmep_txopLimit;
1021 * Select mode; we can be called early in which case we
1022 * always use auto mode. We know we'll be called when
1023 * entering the RUN state with bsschan setup properly
1024 * so state will eventually get set correctly
1026 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC)
1027 mode = ieee80211_chan2mode(ic->ic_bsschan);
1029 mode = IEEE80211_MODE_AUTO;
1032 * This implements agressive mode as found in certain
1033 * vendors' AP's. When there is significant high
1034 * priority (VI/VO) traffic in the BSS throttle back BE
1035 * traffic by using conservative parameters. Otherwise
1036 * BE uses agressive params to optimize performance of
1037 * legacy/non-QoS traffic.
1040 /* Hostap? Only if aggressive mode is enabled */
1041 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
1042 (wme->wme_flags & WME_F_AGGRMODE) != 0)
1046 * Station? Only if we're in a non-QoS BSS.
1048 else if ((vap->iv_opmode == IEEE80211_M_STA &&
1049 (vap->iv_bss->ni_flags & IEEE80211_NODE_QOS) == 0))
1053 * IBSS? Only if we we have WME enabled.
1055 else if ((vap->iv_opmode == IEEE80211_M_IBSS) &&
1056 (vap->iv_flags & IEEE80211_F_WME))
1060 * If WME is disabled on this VAP, default to aggressive mode
1061 * regardless of the configuration.
1063 if ((vap->iv_flags & IEEE80211_F_WME) == 0)
1071 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE];
1072 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE];
1074 chanp->wmep_aifsn = bssp->wmep_aifsn = aggrParam[mode].aifsn;
1075 chanp->wmep_logcwmin = bssp->wmep_logcwmin =
1076 aggrParam[mode].logcwmin;
1077 chanp->wmep_logcwmax = bssp->wmep_logcwmax =
1078 aggrParam[mode].logcwmax;
1079 chanp->wmep_txopLimit = bssp->wmep_txopLimit =
1080 (vap->iv_flags & IEEE80211_F_BURST) ?
1081 aggrParam[mode].txopLimit : 0;
1082 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1083 "update %s (chan+bss) [acm %u aifsn %u logcwmin %u "
1084 "logcwmax %u txop %u]\n", ieee80211_wme_acnames[WME_AC_BE],
1085 chanp->wmep_acm, chanp->wmep_aifsn, chanp->wmep_logcwmin,
1086 chanp->wmep_logcwmax, chanp->wmep_txopLimit);
1091 * Change the contention window based on the number of associated
1092 * stations. If the number of associated stations is 1 and
1093 * aggressive mode is enabled, lower the contention window even
1096 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
1097 ic->ic_sta_assoc < 2 && (wme->wme_flags & WME_F_AGGRMODE) != 0) {
1098 static const uint8_t logCwMin[IEEE80211_MODE_MAX] = {
1099 [IEEE80211_MODE_AUTO] = 3,
1100 [IEEE80211_MODE_11A] = 3,
1101 [IEEE80211_MODE_11B] = 4,
1102 [IEEE80211_MODE_11G] = 3,
1103 [IEEE80211_MODE_FH] = 4,
1104 [IEEE80211_MODE_TURBO_A] = 3,
1105 [IEEE80211_MODE_TURBO_G] = 3,
1106 [IEEE80211_MODE_STURBO_A] = 3,
1107 [IEEE80211_MODE_HALF] = 3,
1108 [IEEE80211_MODE_QUARTER] = 3,
1109 [IEEE80211_MODE_11NA] = 3,
1110 [IEEE80211_MODE_11NG] = 3,
1112 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE];
1113 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE];
1115 chanp->wmep_logcwmin = bssp->wmep_logcwmin = logCwMin[mode];
1116 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1117 "update %s (chan+bss) logcwmin %u\n",
1118 ieee80211_wme_acnames[WME_AC_BE], chanp->wmep_logcwmin);
1122 * Arrange for the beacon update.
1124 * XXX what about MBSS, WDS?
1126 if (vap->iv_opmode == IEEE80211_M_HOSTAP
1127 || vap->iv_opmode == IEEE80211_M_IBSS) {
1129 * Arrange for a beacon update and bump the parameter
1130 * set number so associated stations load the new values.
1132 wme->wme_bssChanParams.cap_info =
1133 (wme->wme_bssChanParams.cap_info+1) & WME_QOSINFO_COUNT;
1134 ieee80211_beacon_notify(vap, IEEE80211_BEACON_WME);
1137 wme->wme_update(ic);
1139 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1140 "%s: WME params updated, cap_info 0x%x\n", __func__,
1141 vap->iv_opmode == IEEE80211_M_STA ?
1142 wme->wme_wmeChanParams.cap_info :
1143 wme->wme_bssChanParams.cap_info);
1147 ieee80211_wme_updateparams(struct ieee80211vap *vap)
1149 struct ieee80211com *ic = vap->iv_ic;
1151 if (ic->ic_caps & IEEE80211_C_WME) {
1153 ieee80211_wme_updateparams_locked(vap);
1154 IEEE80211_UNLOCK(ic);
1159 parent_updown(void *arg, int npending)
1161 struct ieee80211com *ic = arg;
1167 update_mcast(void *arg, int npending)
1169 struct ieee80211com *ic = arg;
1171 ic->ic_update_mcast(ic);
1175 update_promisc(void *arg, int npending)
1177 struct ieee80211com *ic = arg;
1179 ic->ic_update_promisc(ic);
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;
1231 IEEE80211_LOCK_ASSERT(ic);
1233 IEEE80211_DPRINTF(vap,
1234 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1235 "start running, %d vaps running\n", ic->ic_nrunning);
1237 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
1239 * Mark us running. Note that it's ok to do this first;
1240 * if we need to bring the parent device up we defer that
1241 * to avoid dropping the com lock. We expect the device
1242 * to respond to being marked up by calling back into us
1243 * through ieee80211_start_all at which point we'll come
1244 * back in here and complete the work.
1246 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1248 * We are not running; if this we are the first vap
1249 * to be brought up auto-up the parent if necessary.
1251 if (ic->ic_nrunning++ == 0) {
1252 IEEE80211_DPRINTF(vap,
1253 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1254 "%s: up parent %s\n", __func__, ic->ic_name);
1255 ieee80211_runtask(ic, &ic->ic_parent_task);
1260 * If the parent is up and running, then kick the
1261 * 802.11 state machine as appropriate.
1263 if (vap->iv_roaming != IEEE80211_ROAMING_MANUAL) {
1264 if (vap->iv_opmode == IEEE80211_M_STA) {
1266 /* XXX bypasses scan too easily; disable for now */
1268 * Try to be intelligent about clocking the state
1269 * machine. If we're currently in RUN state then
1270 * we should be able to apply any new state/parameters
1271 * simply by re-associating. Otherwise we need to
1272 * re-scan to select an appropriate ap.
1274 if (vap->iv_state >= IEEE80211_S_RUN)
1275 ieee80211_new_state_locked(vap,
1276 IEEE80211_S_ASSOC, 1);
1279 ieee80211_new_state_locked(vap,
1280 IEEE80211_S_SCAN, 0);
1283 * For monitor+wds mode there's nothing to do but
1284 * start running. Otherwise if this is the first
1285 * vap to be brought up, start a scan which may be
1286 * preempted if the station is locked to a particular
1289 vap->iv_flags_ext |= IEEE80211_FEXT_REINIT;
1290 if (vap->iv_opmode == IEEE80211_M_MONITOR ||
1291 vap->iv_opmode == IEEE80211_M_WDS)
1292 ieee80211_new_state_locked(vap,
1293 IEEE80211_S_RUN, -1);
1295 ieee80211_new_state_locked(vap,
1296 IEEE80211_S_SCAN, 0);
1302 * Start a single vap.
1305 ieee80211_init(void *arg)
1307 struct ieee80211vap *vap = arg;
1309 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1312 IEEE80211_LOCK(vap->iv_ic);
1313 ieee80211_start_locked(vap);
1314 IEEE80211_UNLOCK(vap->iv_ic);
1318 * Start all runnable vap's on a device.
1321 ieee80211_start_all(struct ieee80211com *ic)
1323 struct ieee80211vap *vap;
1326 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1327 struct ifnet *ifp = vap->iv_ifp;
1328 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */
1329 ieee80211_start_locked(vap);
1331 IEEE80211_UNLOCK(ic);
1335 * Stop a vap. We force it down using the state machine
1336 * then mark it's ifnet not running. If this is the last
1337 * vap running on the underlying device then we close it
1338 * too to insure it will be properly initialized when the
1339 * next vap is brought up.
1342 ieee80211_stop_locked(struct ieee80211vap *vap)
1344 struct ieee80211com *ic = vap->iv_ic;
1345 struct ifnet *ifp = vap->iv_ifp;
1347 IEEE80211_LOCK_ASSERT(ic);
1349 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1350 "stop running, %d vaps running\n", ic->ic_nrunning);
1352 ieee80211_new_state_locked(vap, IEEE80211_S_INIT, -1);
1353 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
1354 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; /* mark us stopped */
1355 if (--ic->ic_nrunning == 0) {
1356 IEEE80211_DPRINTF(vap,
1357 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1358 "down parent %s\n", ic->ic_name);
1359 ieee80211_runtask(ic, &ic->ic_parent_task);
1365 ieee80211_stop(struct ieee80211vap *vap)
1367 struct ieee80211com *ic = vap->iv_ic;
1370 ieee80211_stop_locked(vap);
1371 IEEE80211_UNLOCK(ic);
1375 * Stop all vap's running on a device.
1378 ieee80211_stop_all(struct ieee80211com *ic)
1380 struct ieee80211vap *vap;
1383 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1384 struct ifnet *ifp = vap->iv_ifp;
1385 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */
1386 ieee80211_stop_locked(vap);
1388 IEEE80211_UNLOCK(ic);
1390 ieee80211_waitfor_parent(ic);
1394 * Stop all vap's running on a device and arrange
1395 * for those that were running to be resumed.
1398 ieee80211_suspend_all(struct ieee80211com *ic)
1400 struct ieee80211vap *vap;
1403 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1404 struct ifnet *ifp = vap->iv_ifp;
1405 if (IFNET_IS_UP_RUNNING(ifp)) { /* NB: avoid recursion */
1406 vap->iv_flags_ext |= IEEE80211_FEXT_RESUME;
1407 ieee80211_stop_locked(vap);
1410 IEEE80211_UNLOCK(ic);
1412 ieee80211_waitfor_parent(ic);
1416 * Start all vap's marked for resume.
1419 ieee80211_resume_all(struct ieee80211com *ic)
1421 struct ieee80211vap *vap;
1424 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1425 struct ifnet *ifp = vap->iv_ifp;
1426 if (!IFNET_IS_UP_RUNNING(ifp) &&
1427 (vap->iv_flags_ext & IEEE80211_FEXT_RESUME)) {
1428 vap->iv_flags_ext &= ~IEEE80211_FEXT_RESUME;
1429 ieee80211_start_locked(vap);
1432 IEEE80211_UNLOCK(ic);
1436 ieee80211_beacon_miss(struct ieee80211com *ic)
1439 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1440 /* Process in a taskq, the handler may reenter the driver */
1441 ieee80211_runtask(ic, &ic->ic_bmiss_task);
1443 IEEE80211_UNLOCK(ic);
1447 beacon_miss(void *arg, int npending)
1449 struct ieee80211com *ic = arg;
1450 struct ieee80211vap *vap;
1453 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1455 * We only pass events through for sta vap's in RUN state;
1456 * may be too restrictive but for now this saves all the
1457 * handlers duplicating these checks.
1459 if (vap->iv_opmode == IEEE80211_M_STA &&
1460 vap->iv_state >= IEEE80211_S_RUN &&
1461 vap->iv_bmiss != NULL)
1464 IEEE80211_UNLOCK(ic);
1468 beacon_swmiss(void *arg, int npending)
1470 struct ieee80211vap *vap = arg;
1471 struct ieee80211com *ic = vap->iv_ic;
1474 if (vap->iv_state == IEEE80211_S_RUN) {
1475 /* XXX Call multiple times if npending > zero? */
1478 IEEE80211_UNLOCK(ic);
1482 * Software beacon miss handling. Check if any beacons
1483 * were received in the last period. If not post a
1484 * beacon miss; otherwise reset the counter.
1487 ieee80211_swbmiss(void *arg)
1489 struct ieee80211vap *vap = arg;
1490 struct ieee80211com *ic = vap->iv_ic;
1492 IEEE80211_LOCK_ASSERT(ic);
1494 /* XXX sleep state? */
1495 KASSERT(vap->iv_state == IEEE80211_S_RUN,
1496 ("wrong state %d", vap->iv_state));
1498 if (ic->ic_flags & IEEE80211_F_SCAN) {
1500 * If scanning just ignore and reset state. If we get a
1501 * bmiss after coming out of scan because we haven't had
1502 * time to receive a beacon then we should probe the AP
1503 * before posting a real bmiss (unless iv_bmiss_max has
1504 * been artifiically lowered). A cleaner solution might
1505 * be to disable the timer on scan start/end but to handle
1506 * case of multiple sta vap's we'd need to disable the
1507 * timers of all affected vap's.
1509 vap->iv_swbmiss_count = 0;
1510 } else if (vap->iv_swbmiss_count == 0) {
1511 if (vap->iv_bmiss != NULL)
1512 ieee80211_runtask(ic, &vap->iv_swbmiss_task);
1514 vap->iv_swbmiss_count = 0;
1515 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period,
1516 ieee80211_swbmiss, vap);
1520 * Start an 802.11h channel switch. We record the parameters,
1521 * mark the operation pending, notify each vap through the
1522 * beacon update mechanism so it can update the beacon frame
1523 * contents, and then switch vap's to CSA state to block outbound
1524 * traffic. Devices that handle CSA directly can use the state
1525 * switch to do the right thing so long as they call
1526 * ieee80211_csa_completeswitch when it's time to complete the
1527 * channel change. Devices that depend on the net80211 layer can
1528 * use ieee80211_beacon_update to handle the countdown and the
1532 ieee80211_csa_startswitch(struct ieee80211com *ic,
1533 struct ieee80211_channel *c, int mode, int count)
1535 struct ieee80211vap *vap;
1537 IEEE80211_LOCK_ASSERT(ic);
1539 ic->ic_csa_newchan = c;
1540 ic->ic_csa_mode = mode;
1541 ic->ic_csa_count = count;
1542 ic->ic_flags |= IEEE80211_F_CSAPENDING;
1543 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1544 if (vap->iv_opmode == IEEE80211_M_HOSTAP ||
1545 vap->iv_opmode == IEEE80211_M_IBSS ||
1546 vap->iv_opmode == IEEE80211_M_MBSS)
1547 ieee80211_beacon_notify(vap, IEEE80211_BEACON_CSA);
1548 /* switch to CSA state to block outbound traffic */
1549 if (vap->iv_state == IEEE80211_S_RUN)
1550 ieee80211_new_state_locked(vap, IEEE80211_S_CSA, 0);
1552 ieee80211_notify_csa(ic, c, mode, count);
1556 * Complete the channel switch by transitioning all CSA VAPs to RUN.
1557 * This is called by both the completion and cancellation functions
1558 * so each VAP is placed back in the RUN state and can thus transmit.
1561 csa_completeswitch(struct ieee80211com *ic)
1563 struct ieee80211vap *vap;
1565 ic->ic_csa_newchan = NULL;
1566 ic->ic_flags &= ~IEEE80211_F_CSAPENDING;
1568 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1569 if (vap->iv_state == IEEE80211_S_CSA)
1570 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0);
1574 * Complete an 802.11h channel switch started by ieee80211_csa_startswitch.
1575 * We clear state and move all vap's in CSA state to RUN state
1576 * so they can again transmit.
1578 * Although this may not be completely correct, update the BSS channel
1579 * for each VAP to the newly configured channel. The setcurchan sets
1580 * the current operating channel for the interface (so the radio does
1581 * switch over) but the VAP BSS isn't updated, leading to incorrectly
1582 * reported information via ioctl.
1585 ieee80211_csa_completeswitch(struct ieee80211com *ic)
1587 struct ieee80211vap *vap;
1589 IEEE80211_LOCK_ASSERT(ic);
1591 KASSERT(ic->ic_flags & IEEE80211_F_CSAPENDING, ("csa not pending"));
1593 ieee80211_setcurchan(ic, ic->ic_csa_newchan);
1594 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1595 if (vap->iv_state == IEEE80211_S_CSA)
1596 vap->iv_bss->ni_chan = ic->ic_curchan;
1598 csa_completeswitch(ic);
1602 * Cancel an 802.11h channel switch started by ieee80211_csa_startswitch.
1603 * We clear state and move all vap's in CSA state to RUN state
1604 * so they can again transmit.
1607 ieee80211_csa_cancelswitch(struct ieee80211com *ic)
1609 IEEE80211_LOCK_ASSERT(ic);
1611 csa_completeswitch(ic);
1615 * Complete a DFS CAC started by ieee80211_dfs_cac_start.
1616 * We clear state and move all vap's in CAC state to RUN state.
1619 ieee80211_cac_completeswitch(struct ieee80211vap *vap0)
1621 struct ieee80211com *ic = vap0->iv_ic;
1622 struct ieee80211vap *vap;
1626 * Complete CAC state change for lead vap first; then
1627 * clock all the other vap's waiting.
1629 KASSERT(vap0->iv_state == IEEE80211_S_CAC,
1630 ("wrong state %d", vap0->iv_state));
1631 ieee80211_new_state_locked(vap0, IEEE80211_S_RUN, 0);
1633 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1634 if (vap->iv_state == IEEE80211_S_CAC)
1635 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0);
1636 IEEE80211_UNLOCK(ic);
1640 * Force all vap's other than the specified vap to the INIT state
1641 * and mark them as waiting for a scan to complete. These vaps
1642 * will be brought up when the scan completes and the scanning vap
1643 * reaches RUN state by wakeupwaiting.
1646 markwaiting(struct ieee80211vap *vap0)
1648 struct ieee80211com *ic = vap0->iv_ic;
1649 struct ieee80211vap *vap;
1651 IEEE80211_LOCK_ASSERT(ic);
1654 * A vap list entry can not disappear since we are running on the
1655 * taskqueue and a vap destroy will queue and drain another state
1658 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1661 if (vap->iv_state != IEEE80211_S_INIT) {
1662 /* NB: iv_newstate may drop the lock */
1663 vap->iv_newstate(vap, IEEE80211_S_INIT, 0);
1664 IEEE80211_LOCK_ASSERT(ic);
1665 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT;
1671 * Wakeup all vap's waiting for a scan to complete. This is the
1672 * companion to markwaiting (above) and is used to coordinate
1673 * multiple vaps scanning.
1674 * This is called from the state taskqueue.
1677 wakeupwaiting(struct ieee80211vap *vap0)
1679 struct ieee80211com *ic = vap0->iv_ic;
1680 struct ieee80211vap *vap;
1682 IEEE80211_LOCK_ASSERT(ic);
1685 * A vap list entry can not disappear since we are running on the
1686 * taskqueue and a vap destroy will queue and drain another state
1689 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1692 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANWAIT) {
1693 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT;
1694 /* NB: sta's cannot go INIT->RUN */
1695 /* NB: iv_newstate may drop the lock */
1696 vap->iv_newstate(vap,
1697 vap->iv_opmode == IEEE80211_M_STA ?
1698 IEEE80211_S_SCAN : IEEE80211_S_RUN, 0);
1699 IEEE80211_LOCK_ASSERT(ic);
1705 * Handle post state change work common to all operating modes.
1708 ieee80211_newstate_cb(void *xvap, int npending)
1710 struct ieee80211vap *vap = xvap;
1711 struct ieee80211com *ic = vap->iv_ic;
1712 enum ieee80211_state nstate, ostate;
1716 nstate = vap->iv_nstate;
1717 arg = vap->iv_nstate_arg;
1719 if (vap->iv_flags_ext & IEEE80211_FEXT_REINIT) {
1721 * We have been requested to drop back to the INIT before
1722 * proceeding to the new state.
1724 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1725 "%s: %s -> %s arg %d\n", __func__,
1726 ieee80211_state_name[vap->iv_state],
1727 ieee80211_state_name[IEEE80211_S_INIT], arg);
1728 vap->iv_newstate(vap, IEEE80211_S_INIT, arg);
1729 IEEE80211_LOCK_ASSERT(ic);
1730 vap->iv_flags_ext &= ~IEEE80211_FEXT_REINIT;
1733 ostate = vap->iv_state;
1734 if (nstate == IEEE80211_S_SCAN && ostate != IEEE80211_S_INIT) {
1736 * SCAN was forced; e.g. on beacon miss. Force other running
1737 * vap's to INIT state and mark them as waiting for the scan to
1738 * complete. This insures they don't interfere with our
1739 * scanning. Since we are single threaded the vaps can not
1740 * transition again while we are executing.
1742 * XXX not always right, assumes ap follows sta
1746 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1747 "%s: %s -> %s arg %d\n", __func__,
1748 ieee80211_state_name[ostate], ieee80211_state_name[nstate], arg);
1750 rc = vap->iv_newstate(vap, nstate, arg);
1751 IEEE80211_LOCK_ASSERT(ic);
1752 vap->iv_flags_ext &= ~IEEE80211_FEXT_STATEWAIT;
1754 /* State transition failed */
1755 KASSERT(rc != EINPROGRESS, ("iv_newstate was deferred"));
1756 KASSERT(nstate != IEEE80211_S_INIT,
1757 ("INIT state change failed"));
1758 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1759 "%s: %s returned error %d\n", __func__,
1760 ieee80211_state_name[nstate], rc);
1764 /* No actual transition, skip post processing */
1765 if (ostate == nstate)
1768 if (nstate == IEEE80211_S_RUN) {
1770 * OACTIVE may be set on the vap if the upper layer
1771 * tried to transmit (e.g. IPv6 NDP) before we reach
1772 * RUN state. Clear it and restart xmit.
1774 * Note this can also happen as a result of SLEEP->RUN
1775 * (i.e. coming out of power save mode).
1777 vap->iv_ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
1780 * XXX TODO Kick-start a VAP queue - this should be a method!
1783 /* bring up any vaps waiting on us */
1785 } else if (nstate == IEEE80211_S_INIT) {
1787 * Flush the scan cache if we did the last scan (XXX?)
1788 * and flush any frames on send queues from this vap.
1789 * Note the mgt q is used only for legacy drivers and
1790 * will go away shortly.
1792 ieee80211_scan_flush(vap);
1795 * XXX TODO: ic/vap queue flush
1799 IEEE80211_UNLOCK(ic);
1803 * Public interface for initiating a state machine change.
1804 * This routine single-threads the request and coordinates
1805 * the scheduling of multiple vaps for the purpose of selecting
1806 * an operating channel. Specifically the following scenarios
1808 * o only one vap can be selecting a channel so on transition to
1809 * SCAN state if another vap is already scanning then
1810 * mark the caller for later processing and return without
1811 * doing anything (XXX? expectations by caller of synchronous operation)
1812 * o only one vap can be doing CAC of a channel so on transition to
1813 * CAC state if another vap is already scanning for radar then
1814 * mark the caller for later processing and return without
1815 * doing anything (XXX? expectations by caller of synchronous operation)
1816 * o if another vap is already running when a request is made
1817 * to SCAN then an operating channel has been chosen; bypass
1818 * the scan and just join the channel
1820 * Note that the state change call is done through the iv_newstate
1821 * method pointer so any driver routine gets invoked. The driver
1822 * will normally call back into operating mode-specific
1823 * ieee80211_newstate routines (below) unless it needs to completely
1824 * bypass the state machine (e.g. because the firmware has it's
1825 * own idea how things should work). Bypassing the net80211 layer
1826 * is usually a mistake and indicates lack of proper integration
1827 * with the net80211 layer.
1830 ieee80211_new_state_locked(struct ieee80211vap *vap,
1831 enum ieee80211_state nstate, int arg)
1833 struct ieee80211com *ic = vap->iv_ic;
1834 struct ieee80211vap *vp;
1835 enum ieee80211_state ostate;
1836 int nrunning, nscanning;
1838 IEEE80211_LOCK_ASSERT(ic);
1840 if (vap->iv_flags_ext & IEEE80211_FEXT_STATEWAIT) {
1841 if (vap->iv_nstate == IEEE80211_S_INIT) {
1843 * XXX The vap is being stopped, do no allow any other
1844 * state changes until this is completed.
1847 } else if (vap->iv_state != vap->iv_nstate) {
1849 /* Warn if the previous state hasn't completed. */
1850 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1851 "%s: pending %s -> %s transition lost\n", __func__,
1852 ieee80211_state_name[vap->iv_state],
1853 ieee80211_state_name[vap->iv_nstate]);
1855 /* XXX temporarily enable to identify issues */
1856 if_printf(vap->iv_ifp,
1857 "%s: pending %s -> %s transition lost\n",
1858 __func__, ieee80211_state_name[vap->iv_state],
1859 ieee80211_state_name[vap->iv_nstate]);
1864 nrunning = nscanning = 0;
1865 /* XXX can track this state instead of calculating */
1866 TAILQ_FOREACH(vp, &ic->ic_vaps, iv_next) {
1868 if (vp->iv_state >= IEEE80211_S_RUN)
1870 /* XXX doesn't handle bg scan */
1871 /* NB: CAC+AUTH+ASSOC treated like SCAN */
1872 else if (vp->iv_state > IEEE80211_S_INIT)
1876 ostate = vap->iv_state;
1877 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1878 "%s: %s -> %s (nrunning %d nscanning %d)\n", __func__,
1879 ieee80211_state_name[ostate], ieee80211_state_name[nstate],
1880 nrunning, nscanning);
1882 case IEEE80211_S_SCAN:
1883 if (ostate == IEEE80211_S_INIT) {
1885 * INIT -> SCAN happens on initial bringup.
1887 KASSERT(!(nscanning && nrunning),
1888 ("%d scanning and %d running", nscanning, nrunning));
1891 * Someone is scanning, defer our state
1892 * change until the work has completed.
1894 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1895 "%s: defer %s -> %s\n",
1896 __func__, ieee80211_state_name[ostate],
1897 ieee80211_state_name[nstate]);
1898 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT;
1903 * Someone is operating; just join the channel
1907 /* XXX check each opmode, adhoc? */
1908 if (vap->iv_opmode == IEEE80211_M_STA)
1909 nstate = IEEE80211_S_SCAN;
1911 nstate = IEEE80211_S_RUN;
1912 #ifdef IEEE80211_DEBUG
1913 if (nstate != IEEE80211_S_SCAN) {
1914 IEEE80211_DPRINTF(vap,
1915 IEEE80211_MSG_STATE,
1916 "%s: override, now %s -> %s\n",
1918 ieee80211_state_name[ostate],
1919 ieee80211_state_name[nstate]);
1925 case IEEE80211_S_RUN:
1926 if (vap->iv_opmode == IEEE80211_M_WDS &&
1927 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) &&
1930 * Legacy WDS with someone else scanning; don't
1931 * go online until that completes as we should
1932 * follow the other vap to the channel they choose.
1934 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1935 "%s: defer %s -> %s (legacy WDS)\n", __func__,
1936 ieee80211_state_name[ostate],
1937 ieee80211_state_name[nstate]);
1938 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT;
1941 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
1942 IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) &&
1943 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) &&
1944 !IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) {
1946 * This is a DFS channel, transition to CAC state
1947 * instead of RUN. This allows us to initiate
1948 * Channel Availability Check (CAC) as specified
1951 nstate = IEEE80211_S_CAC;
1952 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1953 "%s: override %s -> %s (DFS)\n", __func__,
1954 ieee80211_state_name[ostate],
1955 ieee80211_state_name[nstate]);
1958 case IEEE80211_S_INIT:
1959 /* cancel any scan in progress */
1960 ieee80211_cancel_scan(vap);
1961 if (ostate == IEEE80211_S_INIT ) {
1962 /* XXX don't believe this */
1963 /* INIT -> INIT. nothing to do */
1964 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT;
1970 /* defer the state change to a thread */
1971 vap->iv_nstate = nstate;
1972 vap->iv_nstate_arg = arg;
1973 vap->iv_flags_ext |= IEEE80211_FEXT_STATEWAIT;
1974 ieee80211_runtask(ic, &vap->iv_nstate_task);
1979 ieee80211_new_state(struct ieee80211vap *vap,
1980 enum ieee80211_state nstate, int arg)
1982 struct ieee80211com *ic = vap->iv_ic;
1986 rc = ieee80211_new_state_locked(vap, nstate, arg);
1987 IEEE80211_UNLOCK(ic);