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_media.h>
46 #include <net/ethernet.h> /* XXX for ether_sprintf */
48 #include <net80211/ieee80211_var.h>
49 #include <net80211/ieee80211_adhoc.h>
50 #include <net80211/ieee80211_sta.h>
51 #include <net80211/ieee80211_hostap.h>
52 #include <net80211/ieee80211_wds.h>
53 #ifdef IEEE80211_SUPPORT_MESH
54 #include <net80211/ieee80211_mesh.h>
56 #include <net80211/ieee80211_monitor.h>
57 #include <net80211/ieee80211_input.h>
60 #define AGGRESSIVE_MODE_SWITCH_HYSTERESIS 3 /* pkts / 100ms */
61 #define HIGH_PRI_SWITCH_THRESH 10 /* pkts / 100ms */
63 const char *ieee80211_mgt_subtype_name[] = {
64 "assoc_req", "assoc_resp", "reassoc_req", "reassoc_resp",
65 "probe_req", "probe_resp", "reserved#6", "reserved#7",
66 "beacon", "atim", "disassoc", "auth",
67 "deauth", "action", "action_noack", "reserved#15"
69 const char *ieee80211_ctl_subtype_name[] = {
70 "reserved#0", "reserved#1", "reserved#2", "reserved#3",
71 "reserved#3", "reserved#5", "reserved#6", "reserved#7",
72 "reserved#8", "reserved#9", "ps_poll", "rts",
73 "cts", "ack", "cf_end", "cf_end_ack"
75 const char *ieee80211_opmode_name[IEEE80211_OPMODE_MAX] = {
76 "IBSS", /* IEEE80211_M_IBSS */
77 "STA", /* IEEE80211_M_STA */
78 "WDS", /* IEEE80211_M_WDS */
79 "AHDEMO", /* IEEE80211_M_AHDEMO */
80 "HOSTAP", /* IEEE80211_M_HOSTAP */
81 "MONITOR", /* IEEE80211_M_MONITOR */
82 "MBSS" /* IEEE80211_M_MBSS */
84 const char *ieee80211_state_name[IEEE80211_S_MAX] = {
85 "INIT", /* IEEE80211_S_INIT */
86 "SCAN", /* IEEE80211_S_SCAN */
87 "AUTH", /* IEEE80211_S_AUTH */
88 "ASSOC", /* IEEE80211_S_ASSOC */
89 "CAC", /* IEEE80211_S_CAC */
90 "RUN", /* IEEE80211_S_RUN */
91 "CSA", /* IEEE80211_S_CSA */
92 "SLEEP", /* IEEE80211_S_SLEEP */
94 const char *ieee80211_wme_acnames[] = {
102 static void beacon_miss(void *, int);
103 static void beacon_swmiss(void *, int);
104 static void parent_updown(void *, int);
105 static void update_mcast(void *, int);
106 static void update_promisc(void *, int);
107 static void update_channel(void *, int);
108 static void update_chw(void *, int);
109 static void ieee80211_newstate_cb(void *, int);
110 static int ieee80211_new_state_locked(struct ieee80211vap *,
111 enum ieee80211_state, int);
114 null_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
115 const struct ieee80211_bpf_params *params)
117 struct ifnet *ifp = ni->ni_ic->ic_ifp;
119 if_printf(ifp, "missing ic_raw_xmit callback, drop frame\n");
125 ieee80211_proto_attach(struct ieee80211com *ic)
127 struct ifnet *ifp = ic->ic_ifp;
129 /* override the 802.3 setting */
130 ifp->if_hdrlen = ic->ic_headroom
131 + sizeof(struct ieee80211_qosframe_addr4)
132 + IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN
133 + IEEE80211_WEP_EXTIVLEN;
134 /* XXX no way to recalculate on ifdetach */
135 if (ALIGN(ifp->if_hdrlen) > max_linkhdr) {
136 /* XXX sanity check... */
137 max_linkhdr = ALIGN(ifp->if_hdrlen);
138 max_hdr = max_linkhdr + max_protohdr;
139 max_datalen = MHLEN - max_hdr;
141 ic->ic_protmode = IEEE80211_PROT_CTSONLY;
143 TASK_INIT(&ic->ic_parent_task, 0, parent_updown, ifp);
144 TASK_INIT(&ic->ic_mcast_task, 0, update_mcast, ic);
145 TASK_INIT(&ic->ic_promisc_task, 0, update_promisc, ic);
146 TASK_INIT(&ic->ic_chan_task, 0, update_channel, ic);
147 TASK_INIT(&ic->ic_bmiss_task, 0, beacon_miss, ic);
148 TASK_INIT(&ic->ic_chw_task, 0, update_chw, ic);
150 ic->ic_wme.wme_hipri_switch_hysteresis =
151 AGGRESSIVE_MODE_SWITCH_HYSTERESIS;
153 /* initialize management frame handlers */
154 ic->ic_send_mgmt = ieee80211_send_mgmt;
155 ic->ic_raw_xmit = null_raw_xmit;
157 ieee80211_adhoc_attach(ic);
158 ieee80211_sta_attach(ic);
159 ieee80211_wds_attach(ic);
160 ieee80211_hostap_attach(ic);
161 #ifdef IEEE80211_SUPPORT_MESH
162 ieee80211_mesh_attach(ic);
164 ieee80211_monitor_attach(ic);
168 ieee80211_proto_detach(struct ieee80211com *ic)
170 ieee80211_monitor_detach(ic);
171 #ifdef IEEE80211_SUPPORT_MESH
172 ieee80211_mesh_detach(ic);
174 ieee80211_hostap_detach(ic);
175 ieee80211_wds_detach(ic);
176 ieee80211_adhoc_detach(ic);
177 ieee80211_sta_detach(ic);
181 null_update_beacon(struct ieee80211vap *vap, int item)
186 ieee80211_proto_vattach(struct ieee80211vap *vap)
188 struct ieee80211com *ic = vap->iv_ic;
189 struct ifnet *ifp = vap->iv_ifp;
192 /* override the 802.3 setting */
193 ifp->if_hdrlen = ic->ic_ifp->if_hdrlen;
195 vap->iv_rtsthreshold = IEEE80211_RTS_DEFAULT;
196 vap->iv_fragthreshold = IEEE80211_FRAG_DEFAULT;
197 vap->iv_bmiss_max = IEEE80211_BMISS_MAX;
198 callout_init_mtx(&vap->iv_swbmiss, IEEE80211_LOCK_OBJ(ic), 0);
199 callout_init(&vap->iv_mgtsend, CALLOUT_MPSAFE);
200 TASK_INIT(&vap->iv_nstate_task, 0, ieee80211_newstate_cb, vap);
201 TASK_INIT(&vap->iv_swbmiss_task, 0, beacon_swmiss, vap);
203 * Install default tx rate handling: no fixed rate, lowest
204 * supported rate for mgmt and multicast frames. Default
205 * max retry count. These settings can be changed by the
206 * driver and/or user applications.
208 for (i = IEEE80211_MODE_11A; i < IEEE80211_MODE_MAX; i++) {
209 const struct ieee80211_rateset *rs = &ic->ic_sup_rates[i];
211 vap->iv_txparms[i].ucastrate = IEEE80211_FIXED_RATE_NONE;
214 * Setting the management rate to MCS 0 assumes that the
215 * BSS Basic rate set is empty and the BSS Basic MCS set
218 * Since we're not checking this, default to the lowest
219 * defined rate for this mode.
221 * At least one 11n AP (DLINK DIR-825) is reported to drop
222 * some MCS management traffic (eg BA response frames.)
224 * See also: 9.6.0 of the 802.11n-2009 specification.
227 if (i == IEEE80211_MODE_11NA || i == IEEE80211_MODE_11NG) {
228 vap->iv_txparms[i].mgmtrate = 0 | IEEE80211_RATE_MCS;
229 vap->iv_txparms[i].mcastrate = 0 | IEEE80211_RATE_MCS;
231 vap->iv_txparms[i].mgmtrate =
232 rs->rs_rates[0] & IEEE80211_RATE_VAL;
233 vap->iv_txparms[i].mcastrate =
234 rs->rs_rates[0] & IEEE80211_RATE_VAL;
237 vap->iv_txparms[i].mgmtrate = rs->rs_rates[0] & IEEE80211_RATE_VAL;
238 vap->iv_txparms[i].mcastrate = rs->rs_rates[0] & IEEE80211_RATE_VAL;
239 vap->iv_txparms[i].maxretry = IEEE80211_TXMAX_DEFAULT;
241 vap->iv_roaming = IEEE80211_ROAMING_AUTO;
243 vap->iv_update_beacon = null_update_beacon;
244 vap->iv_deliver_data = ieee80211_deliver_data;
246 /* attach support for operating mode */
247 ic->ic_vattach[vap->iv_opmode](vap);
251 ieee80211_proto_vdetach(struct ieee80211vap *vap)
253 #define FREEAPPIE(ie) do { \
255 free(ie, M_80211_NODE_IE); \
258 * Detach operating mode module.
260 if (vap->iv_opdetach != NULL)
261 vap->iv_opdetach(vap);
263 * This should not be needed as we detach when reseting
264 * the state but be conservative here since the
265 * authenticator may do things like spawn kernel threads.
267 if (vap->iv_auth->ia_detach != NULL)
268 vap->iv_auth->ia_detach(vap);
270 * Detach any ACL'ator.
272 if (vap->iv_acl != NULL)
273 vap->iv_acl->iac_detach(vap);
275 FREEAPPIE(vap->iv_appie_beacon);
276 FREEAPPIE(vap->iv_appie_probereq);
277 FREEAPPIE(vap->iv_appie_proberesp);
278 FREEAPPIE(vap->iv_appie_assocreq);
279 FREEAPPIE(vap->iv_appie_assocresp);
280 FREEAPPIE(vap->iv_appie_wpa);
285 * Simple-minded authenticator module support.
288 #define IEEE80211_AUTH_MAX (IEEE80211_AUTH_WPA+1)
289 /* XXX well-known names */
290 static const char *auth_modnames[IEEE80211_AUTH_MAX] = {
291 "wlan_internal", /* IEEE80211_AUTH_NONE */
292 "wlan_internal", /* IEEE80211_AUTH_OPEN */
293 "wlan_internal", /* IEEE80211_AUTH_SHARED */
294 "wlan_xauth", /* IEEE80211_AUTH_8021X */
295 "wlan_internal", /* IEEE80211_AUTH_AUTO */
296 "wlan_xauth", /* IEEE80211_AUTH_WPA */
298 static const struct ieee80211_authenticator *authenticators[IEEE80211_AUTH_MAX];
300 static const struct ieee80211_authenticator auth_internal = {
301 .ia_name = "wlan_internal",
304 .ia_node_join = NULL,
305 .ia_node_leave = NULL,
309 * Setup internal authenticators once; they are never unregistered.
312 ieee80211_auth_setup(void)
314 ieee80211_authenticator_register(IEEE80211_AUTH_OPEN, &auth_internal);
315 ieee80211_authenticator_register(IEEE80211_AUTH_SHARED, &auth_internal);
316 ieee80211_authenticator_register(IEEE80211_AUTH_AUTO, &auth_internal);
318 SYSINIT(wlan_auth, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_auth_setup, NULL);
320 const struct ieee80211_authenticator *
321 ieee80211_authenticator_get(int auth)
323 if (auth >= IEEE80211_AUTH_MAX)
325 if (authenticators[auth] == NULL)
326 ieee80211_load_module(auth_modnames[auth]);
327 return authenticators[auth];
331 ieee80211_authenticator_register(int type,
332 const struct ieee80211_authenticator *auth)
334 if (type >= IEEE80211_AUTH_MAX)
336 authenticators[type] = auth;
340 ieee80211_authenticator_unregister(int type)
343 if (type >= IEEE80211_AUTH_MAX)
345 authenticators[type] = NULL;
349 * Very simple-minded ACL module support.
351 /* XXX just one for now */
352 static const struct ieee80211_aclator *acl = NULL;
355 ieee80211_aclator_register(const struct ieee80211_aclator *iac)
357 printf("wlan: %s acl policy registered\n", iac->iac_name);
362 ieee80211_aclator_unregister(const struct ieee80211_aclator *iac)
366 printf("wlan: %s acl policy unregistered\n", iac->iac_name);
369 const struct ieee80211_aclator *
370 ieee80211_aclator_get(const char *name)
373 ieee80211_load_module("wlan_acl");
374 return acl != NULL && strcmp(acl->iac_name, name) == 0 ? acl : NULL;
378 ieee80211_print_essid(const uint8_t *essid, int len)
383 if (len > IEEE80211_NWID_LEN)
384 len = IEEE80211_NWID_LEN;
385 /* determine printable or not */
386 for (i = 0, p = essid; i < len; i++, p++) {
387 if (*p < ' ' || *p > 0x7e)
392 for (i = 0, p = essid; i < len; i++, p++)
397 for (i = 0, p = essid; i < len; i++, p++)
403 ieee80211_dump_pkt(struct ieee80211com *ic,
404 const uint8_t *buf, int len, int rate, int rssi)
406 const struct ieee80211_frame *wh;
409 wh = (const struct ieee80211_frame *)buf;
410 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) {
411 case IEEE80211_FC1_DIR_NODS:
412 printf("NODS %s", ether_sprintf(wh->i_addr2));
413 printf("->%s", ether_sprintf(wh->i_addr1));
414 printf("(%s)", ether_sprintf(wh->i_addr3));
416 case IEEE80211_FC1_DIR_TODS:
417 printf("TODS %s", ether_sprintf(wh->i_addr2));
418 printf("->%s", ether_sprintf(wh->i_addr3));
419 printf("(%s)", ether_sprintf(wh->i_addr1));
421 case IEEE80211_FC1_DIR_FROMDS:
422 printf("FRDS %s", ether_sprintf(wh->i_addr3));
423 printf("->%s", ether_sprintf(wh->i_addr1));
424 printf("(%s)", ether_sprintf(wh->i_addr2));
426 case IEEE80211_FC1_DIR_DSTODS:
427 printf("DSDS %s", ether_sprintf((const uint8_t *)&wh[1]));
428 printf("->%s", ether_sprintf(wh->i_addr3));
429 printf("(%s", ether_sprintf(wh->i_addr2));
430 printf("->%s)", ether_sprintf(wh->i_addr1));
433 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) {
434 case IEEE80211_FC0_TYPE_DATA:
437 case IEEE80211_FC0_TYPE_MGT:
438 printf(" %s", ieee80211_mgt_subtype_name[
439 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK)
440 >> IEEE80211_FC0_SUBTYPE_SHIFT]);
443 printf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK);
446 if (IEEE80211_QOS_HAS_SEQ(wh)) {
447 const struct ieee80211_qosframe *qwh =
448 (const struct ieee80211_qosframe *)buf;
449 printf(" QoS [TID %u%s]", qwh->i_qos[0] & IEEE80211_QOS_TID,
450 qwh->i_qos[0] & IEEE80211_QOS_ACKPOLICY ? " ACM" : "");
452 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
455 off = ieee80211_anyhdrspace(ic, wh);
456 printf(" WEP [IV %.02x %.02x %.02x",
457 buf[off+0], buf[off+1], buf[off+2]);
458 if (buf[off+IEEE80211_WEP_IVLEN] & IEEE80211_WEP_EXTIV)
459 printf(" %.02x %.02x %.02x",
460 buf[off+4], buf[off+5], buf[off+6]);
461 printf(" KID %u]", buf[off+IEEE80211_WEP_IVLEN] >> 6);
464 printf(" %dM", rate / 2);
466 printf(" +%d", rssi);
469 for (i = 0; i < len; i++) {
472 printf("%02x", buf[i]);
479 findrix(const struct ieee80211_rateset *rs, int r)
483 for (i = 0; i < rs->rs_nrates; i++)
484 if ((rs->rs_rates[i] & IEEE80211_RATE_VAL) == r)
490 ieee80211_fix_rate(struct ieee80211_node *ni,
491 struct ieee80211_rateset *nrs, int flags)
493 #define RV(v) ((v) & IEEE80211_RATE_VAL)
494 struct ieee80211vap *vap = ni->ni_vap;
495 struct ieee80211com *ic = ni->ni_ic;
496 int i, j, rix, error;
497 int okrate, badrate, fixedrate, ucastrate;
498 const struct ieee80211_rateset *srs;
502 okrate = badrate = 0;
503 ucastrate = vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)].ucastrate;
504 if (ucastrate != IEEE80211_FIXED_RATE_NONE) {
506 * Workaround awkwardness with fixed rate. We are called
507 * to check both the legacy rate set and the HT rate set
508 * but we must apply any legacy fixed rate check only to the
509 * legacy rate set and vice versa. We cannot tell what type
510 * of rate set we've been given (legacy or HT) but we can
511 * distinguish the fixed rate type (MCS have 0x80 set).
512 * So to deal with this the caller communicates whether to
513 * check MCS or legacy rate using the flags and we use the
514 * type of any fixed rate to avoid applying an MCS to a
515 * legacy rate and vice versa.
517 if (ucastrate & 0x80) {
518 if (flags & IEEE80211_F_DOFRATE)
519 flags &= ~IEEE80211_F_DOFRATE;
520 } else if ((ucastrate & 0x80) == 0) {
521 if (flags & IEEE80211_F_DOFMCS)
522 flags &= ~IEEE80211_F_DOFMCS;
524 /* NB: required to make MCS match below work */
525 ucastrate &= IEEE80211_RATE_VAL;
527 fixedrate = IEEE80211_FIXED_RATE_NONE;
529 * XXX we are called to process both MCS and legacy rates;
530 * we must use the appropriate basic rate set or chaos will
531 * ensue; for now callers that want MCS must supply
532 * IEEE80211_F_DOBRS; at some point we'll need to split this
533 * function so there are two variants, one for MCS and one
536 if (flags & IEEE80211_F_DOBRS)
537 srs = (const struct ieee80211_rateset *)
538 ieee80211_get_suphtrates(ic, ni->ni_chan);
540 srs = ieee80211_get_suprates(ic, ni->ni_chan);
541 for (i = 0; i < nrs->rs_nrates; ) {
542 if (flags & IEEE80211_F_DOSORT) {
546 for (j = i + 1; j < nrs->rs_nrates; j++) {
547 if (RV(nrs->rs_rates[i]) > RV(nrs->rs_rates[j])) {
548 r = nrs->rs_rates[i];
549 nrs->rs_rates[i] = nrs->rs_rates[j];
550 nrs->rs_rates[j] = r;
554 r = nrs->rs_rates[i] & IEEE80211_RATE_VAL;
557 * Check for fixed rate.
562 * Check against supported rates.
564 rix = findrix(srs, r);
565 if (flags & IEEE80211_F_DONEGO) {
568 * A rate in the node's rate set is not
569 * supported. If this is a basic rate and we
570 * are operating as a STA then this is an error.
571 * Otherwise we just discard/ignore the rate.
573 if ((flags & IEEE80211_F_JOIN) &&
574 (nrs->rs_rates[i] & IEEE80211_RATE_BASIC))
576 } else if ((flags & IEEE80211_F_JOIN) == 0) {
578 * Overwrite with the supported rate
579 * value so any basic rate bit is set.
581 nrs->rs_rates[i] = srs->rs_rates[rix];
584 if ((flags & IEEE80211_F_DODEL) && rix < 0) {
586 * Delete unacceptable rates.
589 for (j = i; j < nrs->rs_nrates; j++)
590 nrs->rs_rates[j] = nrs->rs_rates[j + 1];
591 nrs->rs_rates[j] = 0;
595 okrate = nrs->rs_rates[i];
598 if (okrate == 0 || error != 0 ||
599 ((flags & (IEEE80211_F_DOFRATE|IEEE80211_F_DOFMCS)) &&
600 fixedrate != ucastrate)) {
601 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni,
602 "%s: flags 0x%x okrate %d error %d fixedrate 0x%x "
603 "ucastrate %x\n", __func__, fixedrate, ucastrate, flags);
604 return badrate | IEEE80211_RATE_BASIC;
611 * Reset 11g-related state.
614 ieee80211_reset_erp(struct ieee80211com *ic)
616 ic->ic_flags &= ~IEEE80211_F_USEPROT;
617 ic->ic_nonerpsta = 0;
618 ic->ic_longslotsta = 0;
620 * Short slot time is enabled only when operating in 11g
621 * and not in an IBSS. We must also honor whether or not
622 * the driver is capable of doing it.
624 ieee80211_set_shortslottime(ic,
625 IEEE80211_IS_CHAN_A(ic->ic_curchan) ||
626 IEEE80211_IS_CHAN_HT(ic->ic_curchan) ||
627 (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
628 ic->ic_opmode == IEEE80211_M_HOSTAP &&
629 (ic->ic_caps & IEEE80211_C_SHSLOT)));
631 * Set short preamble and ERP barker-preamble flags.
633 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) ||
634 (ic->ic_caps & IEEE80211_C_SHPREAMBLE)) {
635 ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
636 ic->ic_flags &= ~IEEE80211_F_USEBARKER;
638 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
639 ic->ic_flags |= IEEE80211_F_USEBARKER;
644 * Set the short slot time state and notify the driver.
647 ieee80211_set_shortslottime(struct ieee80211com *ic, int onoff)
650 ic->ic_flags |= IEEE80211_F_SHSLOT;
652 ic->ic_flags &= ~IEEE80211_F_SHSLOT;
654 if (ic->ic_updateslot != NULL)
655 ic->ic_updateslot(ic->ic_ifp);
659 * Check if the specified rate set supports ERP.
660 * NB: the rate set is assumed to be sorted.
663 ieee80211_iserp_rateset(const struct ieee80211_rateset *rs)
665 #define N(a) (sizeof(a) / sizeof(a[0]))
666 static const int rates[] = { 2, 4, 11, 22, 12, 24, 48 };
669 if (rs->rs_nrates < N(rates))
671 for (i = 0; i < N(rates); i++) {
672 for (j = 0; j < rs->rs_nrates; j++) {
673 int r = rs->rs_rates[j] & IEEE80211_RATE_VAL;
688 * Mark the basic rates for the rate table based on the
689 * operating mode. For real 11g we mark all the 11b rates
690 * and 6, 12, and 24 OFDM. For 11b compatibility we mark only
691 * 11b rates. There's also a pseudo 11a-mode used to mark only
692 * the basic OFDM rates.
695 setbasicrates(struct ieee80211_rateset *rs,
696 enum ieee80211_phymode mode, int add)
698 static const struct ieee80211_rateset basic[IEEE80211_MODE_MAX] = {
699 [IEEE80211_MODE_11A] = { 3, { 12, 24, 48 } },
700 [IEEE80211_MODE_11B] = { 2, { 2, 4 } },
702 [IEEE80211_MODE_11G] = { 4, { 2, 4, 11, 22 } },
703 [IEEE80211_MODE_TURBO_A] = { 3, { 12, 24, 48 } },
704 [IEEE80211_MODE_TURBO_G] = { 4, { 2, 4, 11, 22 } },
705 [IEEE80211_MODE_STURBO_A] = { 3, { 12, 24, 48 } },
706 [IEEE80211_MODE_HALF] = { 3, { 6, 12, 24 } },
707 [IEEE80211_MODE_QUARTER] = { 3, { 3, 6, 12 } },
708 [IEEE80211_MODE_11NA] = { 3, { 12, 24, 48 } },
710 [IEEE80211_MODE_11NG] = { 4, { 2, 4, 11, 22 } },
714 for (i = 0; i < rs->rs_nrates; i++) {
716 rs->rs_rates[i] &= IEEE80211_RATE_VAL;
717 for (j = 0; j < basic[mode].rs_nrates; j++)
718 if (basic[mode].rs_rates[j] == rs->rs_rates[i]) {
719 rs->rs_rates[i] |= IEEE80211_RATE_BASIC;
726 * Set the basic rates in a rate set.
729 ieee80211_setbasicrates(struct ieee80211_rateset *rs,
730 enum ieee80211_phymode mode)
732 setbasicrates(rs, mode, 0);
736 * Add basic rates to a rate set.
739 ieee80211_addbasicrates(struct ieee80211_rateset *rs,
740 enum ieee80211_phymode mode)
742 setbasicrates(rs, mode, 1);
746 * WME protocol support.
748 * The default 11a/b/g/n parameters come from the WiFi Alliance WMM
749 * System Interopability Test Plan (v1.4, Appendix F) and the 802.11n
750 * Draft 2.0 Test Plan (Appendix D).
752 * Static/Dynamic Turbo mode settings come from Atheros.
754 typedef struct phyParamType {
762 static const struct phyParamType phyParamForAC_BE[IEEE80211_MODE_MAX] = {
763 [IEEE80211_MODE_AUTO] = { 3, 4, 6, 0, 0 },
764 [IEEE80211_MODE_11A] = { 3, 4, 6, 0, 0 },
765 [IEEE80211_MODE_11B] = { 3, 4, 6, 0, 0 },
766 [IEEE80211_MODE_11G] = { 3, 4, 6, 0, 0 },
767 [IEEE80211_MODE_FH] = { 3, 4, 6, 0, 0 },
768 [IEEE80211_MODE_TURBO_A]= { 2, 3, 5, 0, 0 },
769 [IEEE80211_MODE_TURBO_G]= { 2, 3, 5, 0, 0 },
770 [IEEE80211_MODE_STURBO_A]={ 2, 3, 5, 0, 0 },
771 [IEEE80211_MODE_HALF] = { 3, 4, 6, 0, 0 },
772 [IEEE80211_MODE_QUARTER]= { 3, 4, 6, 0, 0 },
773 [IEEE80211_MODE_11NA] = { 3, 4, 6, 0, 0 },
774 [IEEE80211_MODE_11NG] = { 3, 4, 6, 0, 0 },
776 static const struct phyParamType phyParamForAC_BK[IEEE80211_MODE_MAX] = {
777 [IEEE80211_MODE_AUTO] = { 7, 4, 10, 0, 0 },
778 [IEEE80211_MODE_11A] = { 7, 4, 10, 0, 0 },
779 [IEEE80211_MODE_11B] = { 7, 4, 10, 0, 0 },
780 [IEEE80211_MODE_11G] = { 7, 4, 10, 0, 0 },
781 [IEEE80211_MODE_FH] = { 7, 4, 10, 0, 0 },
782 [IEEE80211_MODE_TURBO_A]= { 7, 3, 10, 0, 0 },
783 [IEEE80211_MODE_TURBO_G]= { 7, 3, 10, 0, 0 },
784 [IEEE80211_MODE_STURBO_A]={ 7, 3, 10, 0, 0 },
785 [IEEE80211_MODE_HALF] = { 7, 4, 10, 0, 0 },
786 [IEEE80211_MODE_QUARTER]= { 7, 4, 10, 0, 0 },
787 [IEEE80211_MODE_11NA] = { 7, 4, 10, 0, 0 },
788 [IEEE80211_MODE_11NG] = { 7, 4, 10, 0, 0 },
790 static const struct phyParamType phyParamForAC_VI[IEEE80211_MODE_MAX] = {
791 [IEEE80211_MODE_AUTO] = { 1, 3, 4, 94, 0 },
792 [IEEE80211_MODE_11A] = { 1, 3, 4, 94, 0 },
793 [IEEE80211_MODE_11B] = { 1, 3, 4, 188, 0 },
794 [IEEE80211_MODE_11G] = { 1, 3, 4, 94, 0 },
795 [IEEE80211_MODE_FH] = { 1, 3, 4, 188, 0 },
796 [IEEE80211_MODE_TURBO_A]= { 1, 2, 3, 94, 0 },
797 [IEEE80211_MODE_TURBO_G]= { 1, 2, 3, 94, 0 },
798 [IEEE80211_MODE_STURBO_A]={ 1, 2, 3, 94, 0 },
799 [IEEE80211_MODE_HALF] = { 1, 3, 4, 94, 0 },
800 [IEEE80211_MODE_QUARTER]= { 1, 3, 4, 94, 0 },
801 [IEEE80211_MODE_11NA] = { 1, 3, 4, 94, 0 },
802 [IEEE80211_MODE_11NG] = { 1, 3, 4, 94, 0 },
804 static const struct phyParamType phyParamForAC_VO[IEEE80211_MODE_MAX] = {
805 [IEEE80211_MODE_AUTO] = { 1, 2, 3, 47, 0 },
806 [IEEE80211_MODE_11A] = { 1, 2, 3, 47, 0 },
807 [IEEE80211_MODE_11B] = { 1, 2, 3, 102, 0 },
808 [IEEE80211_MODE_11G] = { 1, 2, 3, 47, 0 },
809 [IEEE80211_MODE_FH] = { 1, 2, 3, 102, 0 },
810 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 },
811 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 },
812 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 },
813 [IEEE80211_MODE_HALF] = { 1, 2, 3, 47, 0 },
814 [IEEE80211_MODE_QUARTER]= { 1, 2, 3, 47, 0 },
815 [IEEE80211_MODE_11NA] = { 1, 2, 3, 47, 0 },
816 [IEEE80211_MODE_11NG] = { 1, 2, 3, 47, 0 },
819 static const struct phyParamType bssPhyParamForAC_BE[IEEE80211_MODE_MAX] = {
820 [IEEE80211_MODE_AUTO] = { 3, 4, 10, 0, 0 },
821 [IEEE80211_MODE_11A] = { 3, 4, 10, 0, 0 },
822 [IEEE80211_MODE_11B] = { 3, 4, 10, 0, 0 },
823 [IEEE80211_MODE_11G] = { 3, 4, 10, 0, 0 },
824 [IEEE80211_MODE_FH] = { 3, 4, 10, 0, 0 },
825 [IEEE80211_MODE_TURBO_A]= { 2, 3, 10, 0, 0 },
826 [IEEE80211_MODE_TURBO_G]= { 2, 3, 10, 0, 0 },
827 [IEEE80211_MODE_STURBO_A]={ 2, 3, 10, 0, 0 },
828 [IEEE80211_MODE_HALF] = { 3, 4, 10, 0, 0 },
829 [IEEE80211_MODE_QUARTER]= { 3, 4, 10, 0, 0 },
830 [IEEE80211_MODE_11NA] = { 3, 4, 10, 0, 0 },
831 [IEEE80211_MODE_11NG] = { 3, 4, 10, 0, 0 },
833 static const struct phyParamType bssPhyParamForAC_VI[IEEE80211_MODE_MAX] = {
834 [IEEE80211_MODE_AUTO] = { 2, 3, 4, 94, 0 },
835 [IEEE80211_MODE_11A] = { 2, 3, 4, 94, 0 },
836 [IEEE80211_MODE_11B] = { 2, 3, 4, 188, 0 },
837 [IEEE80211_MODE_11G] = { 2, 3, 4, 94, 0 },
838 [IEEE80211_MODE_FH] = { 2, 3, 4, 188, 0 },
839 [IEEE80211_MODE_TURBO_A]= { 2, 2, 3, 94, 0 },
840 [IEEE80211_MODE_TURBO_G]= { 2, 2, 3, 94, 0 },
841 [IEEE80211_MODE_STURBO_A]={ 2, 2, 3, 94, 0 },
842 [IEEE80211_MODE_HALF] = { 2, 3, 4, 94, 0 },
843 [IEEE80211_MODE_QUARTER]= { 2, 3, 4, 94, 0 },
844 [IEEE80211_MODE_11NA] = { 2, 3, 4, 94, 0 },
845 [IEEE80211_MODE_11NG] = { 2, 3, 4, 94, 0 },
847 static const struct phyParamType bssPhyParamForAC_VO[IEEE80211_MODE_MAX] = {
848 [IEEE80211_MODE_AUTO] = { 2, 2, 3, 47, 0 },
849 [IEEE80211_MODE_11A] = { 2, 2, 3, 47, 0 },
850 [IEEE80211_MODE_11B] = { 2, 2, 3, 102, 0 },
851 [IEEE80211_MODE_11G] = { 2, 2, 3, 47, 0 },
852 [IEEE80211_MODE_FH] = { 2, 2, 3, 102, 0 },
853 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 },
854 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 },
855 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 },
856 [IEEE80211_MODE_HALF] = { 2, 2, 3, 47, 0 },
857 [IEEE80211_MODE_QUARTER]= { 2, 2, 3, 47, 0 },
858 [IEEE80211_MODE_11NA] = { 2, 2, 3, 47, 0 },
859 [IEEE80211_MODE_11NG] = { 2, 2, 3, 47, 0 },
863 _setifsparams(struct wmeParams *wmep, const paramType *phy)
865 wmep->wmep_aifsn = phy->aifsn;
866 wmep->wmep_logcwmin = phy->logcwmin;
867 wmep->wmep_logcwmax = phy->logcwmax;
868 wmep->wmep_txopLimit = phy->txopLimit;
872 setwmeparams(struct ieee80211vap *vap, const char *type, int ac,
873 struct wmeParams *wmep, const paramType *phy)
875 wmep->wmep_acm = phy->acm;
876 _setifsparams(wmep, phy);
878 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
879 "set %s (%s) [acm %u aifsn %u logcwmin %u logcwmax %u txop %u]\n",
880 ieee80211_wme_acnames[ac], type,
881 wmep->wmep_acm, wmep->wmep_aifsn, wmep->wmep_logcwmin,
882 wmep->wmep_logcwmax, wmep->wmep_txopLimit);
886 ieee80211_wme_initparams_locked(struct ieee80211vap *vap)
888 struct ieee80211com *ic = vap->iv_ic;
889 struct ieee80211_wme_state *wme = &ic->ic_wme;
890 const paramType *pPhyParam, *pBssPhyParam;
891 struct wmeParams *wmep;
892 enum ieee80211_phymode mode;
895 IEEE80211_LOCK_ASSERT(ic);
897 if ((ic->ic_caps & IEEE80211_C_WME) == 0 || ic->ic_nrunning > 1)
901 * Clear the wme cap_info field so a qoscount from a previous
902 * vap doesn't confuse later code which only parses the beacon
903 * field and updates hardware when said field changes.
904 * Otherwise the hardware is programmed with defaults, not what
905 * the beacon actually announces.
907 wme->wme_wmeChanParams.cap_info = 0;
910 * Select mode; we can be called early in which case we
911 * always use auto mode. We know we'll be called when
912 * entering the RUN state with bsschan setup properly
913 * so state will eventually get set correctly
915 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC)
916 mode = ieee80211_chan2mode(ic->ic_bsschan);
918 mode = IEEE80211_MODE_AUTO;
919 for (i = 0; i < WME_NUM_AC; i++) {
922 pPhyParam = &phyParamForAC_BK[mode];
923 pBssPhyParam = &phyParamForAC_BK[mode];
926 pPhyParam = &phyParamForAC_VI[mode];
927 pBssPhyParam = &bssPhyParamForAC_VI[mode];
930 pPhyParam = &phyParamForAC_VO[mode];
931 pBssPhyParam = &bssPhyParamForAC_VO[mode];
935 pPhyParam = &phyParamForAC_BE[mode];
936 pBssPhyParam = &bssPhyParamForAC_BE[mode];
939 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i];
940 if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
941 setwmeparams(vap, "chan", i, wmep, pPhyParam);
943 setwmeparams(vap, "chan", i, wmep, pBssPhyParam);
945 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i];
946 setwmeparams(vap, "bss ", i, wmep, pBssPhyParam);
948 /* NB: check ic_bss to avoid NULL deref on initial attach */
949 if (vap->iv_bss != NULL) {
951 * Calculate agressive mode switching threshold based
952 * on beacon interval. This doesn't need locking since
953 * we're only called before entering the RUN state at
954 * which point we start sending beacon frames.
956 wme->wme_hipri_switch_thresh =
957 (HIGH_PRI_SWITCH_THRESH * vap->iv_bss->ni_intval) / 100;
958 wme->wme_flags &= ~WME_F_AGGRMODE;
959 ieee80211_wme_updateparams(vap);
964 ieee80211_wme_initparams(struct ieee80211vap *vap)
966 struct ieee80211com *ic = vap->iv_ic;
969 ieee80211_wme_initparams_locked(vap);
970 IEEE80211_UNLOCK(ic);
974 * Update WME parameters for ourself and the BSS.
977 ieee80211_wme_updateparams_locked(struct ieee80211vap *vap)
979 static const paramType aggrParam[IEEE80211_MODE_MAX] = {
980 [IEEE80211_MODE_AUTO] = { 2, 4, 10, 64, 0 },
981 [IEEE80211_MODE_11A] = { 2, 4, 10, 64, 0 },
982 [IEEE80211_MODE_11B] = { 2, 5, 10, 64, 0 },
983 [IEEE80211_MODE_11G] = { 2, 4, 10, 64, 0 },
984 [IEEE80211_MODE_FH] = { 2, 5, 10, 64, 0 },
985 [IEEE80211_MODE_TURBO_A] = { 1, 3, 10, 64, 0 },
986 [IEEE80211_MODE_TURBO_G] = { 1, 3, 10, 64, 0 },
987 [IEEE80211_MODE_STURBO_A] = { 1, 3, 10, 64, 0 },
988 [IEEE80211_MODE_HALF] = { 2, 4, 10, 64, 0 },
989 [IEEE80211_MODE_QUARTER] = { 2, 4, 10, 64, 0 },
990 [IEEE80211_MODE_11NA] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/
991 [IEEE80211_MODE_11NG] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/
993 struct ieee80211com *ic = vap->iv_ic;
994 struct ieee80211_wme_state *wme = &ic->ic_wme;
995 const struct wmeParams *wmep;
996 struct wmeParams *chanp, *bssp;
997 enum ieee80211_phymode mode;
1002 * Set up the channel access parameters for the physical
1003 * device. First populate the configured settings.
1005 for (i = 0; i < WME_NUM_AC; i++) {
1006 chanp = &wme->wme_chanParams.cap_wmeParams[i];
1007 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i];
1008 chanp->wmep_aifsn = wmep->wmep_aifsn;
1009 chanp->wmep_logcwmin = wmep->wmep_logcwmin;
1010 chanp->wmep_logcwmax = wmep->wmep_logcwmax;
1011 chanp->wmep_txopLimit = wmep->wmep_txopLimit;
1013 chanp = &wme->wme_bssChanParams.cap_wmeParams[i];
1014 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i];
1015 chanp->wmep_aifsn = wmep->wmep_aifsn;
1016 chanp->wmep_logcwmin = wmep->wmep_logcwmin;
1017 chanp->wmep_logcwmax = wmep->wmep_logcwmax;
1018 chanp->wmep_txopLimit = wmep->wmep_txopLimit;
1022 * Select mode; we can be called early in which case we
1023 * always use auto mode. We know we'll be called when
1024 * entering the RUN state with bsschan setup properly
1025 * so state will eventually get set correctly
1027 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC)
1028 mode = ieee80211_chan2mode(ic->ic_bsschan);
1030 mode = IEEE80211_MODE_AUTO;
1033 * This implements agressive mode as found in certain
1034 * vendors' AP's. When there is significant high
1035 * priority (VI/VO) traffic in the BSS throttle back BE
1036 * traffic by using conservative parameters. Otherwise
1037 * BE uses agressive params to optimize performance of
1038 * legacy/non-QoS traffic.
1041 /* Hostap? Only if aggressive mode is enabled */
1042 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
1043 (wme->wme_flags & WME_F_AGGRMODE) != 0)
1047 * Station? Only if we're in a non-QoS BSS.
1049 else if ((vap->iv_opmode == IEEE80211_M_STA &&
1050 (vap->iv_bss->ni_flags & IEEE80211_NODE_QOS) == 0))
1054 * IBSS? Only if we we have WME enabled.
1056 else if ((vap->iv_opmode == IEEE80211_M_IBSS) &&
1057 (vap->iv_flags & IEEE80211_F_WME))
1061 * If WME is disabled on this VAP, default to aggressive mode
1062 * regardless of the configuration.
1064 if ((vap->iv_flags & IEEE80211_F_WME) == 0)
1072 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE];
1073 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE];
1075 chanp->wmep_aifsn = bssp->wmep_aifsn = aggrParam[mode].aifsn;
1076 chanp->wmep_logcwmin = bssp->wmep_logcwmin =
1077 aggrParam[mode].logcwmin;
1078 chanp->wmep_logcwmax = bssp->wmep_logcwmax =
1079 aggrParam[mode].logcwmax;
1080 chanp->wmep_txopLimit = bssp->wmep_txopLimit =
1081 (vap->iv_flags & IEEE80211_F_BURST) ?
1082 aggrParam[mode].txopLimit : 0;
1083 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1084 "update %s (chan+bss) [acm %u aifsn %u logcwmin %u "
1085 "logcwmax %u txop %u]\n", ieee80211_wme_acnames[WME_AC_BE],
1086 chanp->wmep_acm, chanp->wmep_aifsn, chanp->wmep_logcwmin,
1087 chanp->wmep_logcwmax, chanp->wmep_txopLimit);
1092 * Change the contention window based on the number of associated
1093 * stations. If the number of associated stations is 1 and
1094 * aggressive mode is enabled, lower the contention window even
1097 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
1098 ic->ic_sta_assoc < 2 && (wme->wme_flags & WME_F_AGGRMODE) != 0) {
1099 static const uint8_t logCwMin[IEEE80211_MODE_MAX] = {
1100 [IEEE80211_MODE_AUTO] = 3,
1101 [IEEE80211_MODE_11A] = 3,
1102 [IEEE80211_MODE_11B] = 4,
1103 [IEEE80211_MODE_11G] = 3,
1104 [IEEE80211_MODE_FH] = 4,
1105 [IEEE80211_MODE_TURBO_A] = 3,
1106 [IEEE80211_MODE_TURBO_G] = 3,
1107 [IEEE80211_MODE_STURBO_A] = 3,
1108 [IEEE80211_MODE_HALF] = 3,
1109 [IEEE80211_MODE_QUARTER] = 3,
1110 [IEEE80211_MODE_11NA] = 3,
1111 [IEEE80211_MODE_11NG] = 3,
1113 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE];
1114 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE];
1116 chanp->wmep_logcwmin = bssp->wmep_logcwmin = logCwMin[mode];
1117 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1118 "update %s (chan+bss) logcwmin %u\n",
1119 ieee80211_wme_acnames[WME_AC_BE], chanp->wmep_logcwmin);
1123 * Arrange for the beacon update.
1125 * XXX what about MBSS, WDS?
1127 if (vap->iv_opmode == IEEE80211_M_HOSTAP
1128 || vap->iv_opmode == IEEE80211_M_IBSS) {
1130 * Arrange for a beacon update and bump the parameter
1131 * set number so associated stations load the new values.
1133 wme->wme_bssChanParams.cap_info =
1134 (wme->wme_bssChanParams.cap_info+1) & WME_QOSINFO_COUNT;
1135 ieee80211_beacon_notify(vap, IEEE80211_BEACON_WME);
1138 wme->wme_update(ic);
1140 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1141 "%s: WME params updated, cap_info 0x%x\n", __func__,
1142 vap->iv_opmode == IEEE80211_M_STA ?
1143 wme->wme_wmeChanParams.cap_info :
1144 wme->wme_bssChanParams.cap_info);
1148 ieee80211_wme_updateparams(struct ieee80211vap *vap)
1150 struct ieee80211com *ic = vap->iv_ic;
1152 if (ic->ic_caps & IEEE80211_C_WME) {
1154 ieee80211_wme_updateparams_locked(vap);
1155 IEEE80211_UNLOCK(ic);
1160 parent_updown(void *arg, int npending)
1162 struct ifnet *parent = arg;
1164 parent->if_ioctl(parent, SIOCSIFFLAGS, NULL);
1168 update_mcast(void *arg, int npending)
1170 struct ieee80211com *ic = arg;
1171 struct ifnet *parent = ic->ic_ifp;
1173 ic->ic_update_mcast(parent);
1177 update_promisc(void *arg, int npending)
1179 struct ieee80211com *ic = arg;
1180 struct ifnet *parent = ic->ic_ifp;
1182 ic->ic_update_promisc(parent);
1186 update_channel(void *arg, int npending)
1188 struct ieee80211com *ic = arg;
1190 ic->ic_set_channel(ic);
1191 ieee80211_radiotap_chan_change(ic);
1195 update_chw(void *arg, int npending)
1197 struct ieee80211com *ic = arg;
1200 * XXX should we defer the channel width _config_ update until now?
1202 ic->ic_update_chw(ic);
1206 * Block until the parent is in a known state. This is
1207 * used after any operations that dispatch a task (e.g.
1208 * to auto-configure the parent device up/down).
1211 ieee80211_waitfor_parent(struct ieee80211com *ic)
1213 taskqueue_block(ic->ic_tq);
1214 ieee80211_draintask(ic, &ic->ic_parent_task);
1215 ieee80211_draintask(ic, &ic->ic_mcast_task);
1216 ieee80211_draintask(ic, &ic->ic_promisc_task);
1217 ieee80211_draintask(ic, &ic->ic_chan_task);
1218 ieee80211_draintask(ic, &ic->ic_bmiss_task);
1219 ieee80211_draintask(ic, &ic->ic_chw_task);
1220 taskqueue_unblock(ic->ic_tq);
1224 * Start a vap running. If this is the first vap to be
1225 * set running on the underlying device then we
1226 * automatically bring the device up.
1229 ieee80211_start_locked(struct ieee80211vap *vap)
1231 struct ifnet *ifp = vap->iv_ifp;
1232 struct ieee80211com *ic = vap->iv_ic;
1233 struct ifnet *parent = ic->ic_ifp;
1235 IEEE80211_LOCK_ASSERT(ic);
1237 IEEE80211_DPRINTF(vap,
1238 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1239 "start running, %d vaps running\n", ic->ic_nrunning);
1241 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
1243 * Mark us running. Note that it's ok to do this first;
1244 * if we need to bring the parent device up we defer that
1245 * to avoid dropping the com lock. We expect the device
1246 * to respond to being marked up by calling back into us
1247 * through ieee80211_start_all at which point we'll come
1248 * back in here and complete the work.
1250 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1252 * We are not running; if this we are the first vap
1253 * to be brought up auto-up the parent if necessary.
1255 if (ic->ic_nrunning++ == 0 &&
1256 (parent->if_drv_flags & IFF_DRV_RUNNING) == 0) {
1257 IEEE80211_DPRINTF(vap,
1258 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1259 "%s: up parent %s\n", __func__, parent->if_xname);
1260 parent->if_flags |= IFF_UP;
1261 ieee80211_runtask(ic, &ic->ic_parent_task);
1266 * If the parent is up and running, then kick the
1267 * 802.11 state machine as appropriate.
1269 if ((parent->if_drv_flags & IFF_DRV_RUNNING) &&
1270 vap->iv_roaming != IEEE80211_ROAMING_MANUAL) {
1271 if (vap->iv_opmode == IEEE80211_M_STA) {
1273 /* XXX bypasses scan too easily; disable for now */
1275 * Try to be intelligent about clocking the state
1276 * machine. If we're currently in RUN state then
1277 * we should be able to apply any new state/parameters
1278 * simply by re-associating. Otherwise we need to
1279 * re-scan to select an appropriate ap.
1281 if (vap->iv_state >= IEEE80211_S_RUN)
1282 ieee80211_new_state_locked(vap,
1283 IEEE80211_S_ASSOC, 1);
1286 ieee80211_new_state_locked(vap,
1287 IEEE80211_S_SCAN, 0);
1290 * For monitor+wds mode there's nothing to do but
1291 * start running. Otherwise if this is the first
1292 * vap to be brought up, start a scan which may be
1293 * preempted if the station is locked to a particular
1296 vap->iv_flags_ext |= IEEE80211_FEXT_REINIT;
1297 if (vap->iv_opmode == IEEE80211_M_MONITOR ||
1298 vap->iv_opmode == IEEE80211_M_WDS)
1299 ieee80211_new_state_locked(vap,
1300 IEEE80211_S_RUN, -1);
1302 ieee80211_new_state_locked(vap,
1303 IEEE80211_S_SCAN, 0);
1309 * Start a single vap.
1312 ieee80211_init(void *arg)
1314 struct ieee80211vap *vap = arg;
1316 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1319 IEEE80211_LOCK(vap->iv_ic);
1320 ieee80211_start_locked(vap);
1321 IEEE80211_UNLOCK(vap->iv_ic);
1325 * Start all runnable vap's on a device.
1328 ieee80211_start_all(struct ieee80211com *ic)
1330 struct ieee80211vap *vap;
1333 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1334 struct ifnet *ifp = vap->iv_ifp;
1335 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */
1336 ieee80211_start_locked(vap);
1338 IEEE80211_UNLOCK(ic);
1342 * Stop a vap. We force it down using the state machine
1343 * then mark it's ifnet not running. If this is the last
1344 * vap running on the underlying device then we close it
1345 * too to insure it will be properly initialized when the
1346 * next vap is brought up.
1349 ieee80211_stop_locked(struct ieee80211vap *vap)
1351 struct ieee80211com *ic = vap->iv_ic;
1352 struct ifnet *ifp = vap->iv_ifp;
1353 struct ifnet *parent = ic->ic_ifp;
1355 IEEE80211_LOCK_ASSERT(ic);
1357 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1358 "stop running, %d vaps running\n", ic->ic_nrunning);
1360 ieee80211_new_state_locked(vap, IEEE80211_S_INIT, -1);
1361 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
1362 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; /* mark us stopped */
1363 if (--ic->ic_nrunning == 0 &&
1364 (parent->if_drv_flags & IFF_DRV_RUNNING)) {
1365 IEEE80211_DPRINTF(vap,
1366 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1367 "down parent %s\n", parent->if_xname);
1368 parent->if_flags &= ~IFF_UP;
1369 ieee80211_runtask(ic, &ic->ic_parent_task);
1375 ieee80211_stop(struct ieee80211vap *vap)
1377 struct ieee80211com *ic = vap->iv_ic;
1380 ieee80211_stop_locked(vap);
1381 IEEE80211_UNLOCK(ic);
1385 * Stop all vap's running on a device.
1388 ieee80211_stop_all(struct ieee80211com *ic)
1390 struct ieee80211vap *vap;
1393 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1394 struct ifnet *ifp = vap->iv_ifp;
1395 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */
1396 ieee80211_stop_locked(vap);
1398 IEEE80211_UNLOCK(ic);
1400 ieee80211_waitfor_parent(ic);
1404 * Stop all vap's running on a device and arrange
1405 * for those that were running to be resumed.
1408 ieee80211_suspend_all(struct ieee80211com *ic)
1410 struct ieee80211vap *vap;
1413 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1414 struct ifnet *ifp = vap->iv_ifp;
1415 if (IFNET_IS_UP_RUNNING(ifp)) { /* NB: avoid recursion */
1416 vap->iv_flags_ext |= IEEE80211_FEXT_RESUME;
1417 ieee80211_stop_locked(vap);
1420 IEEE80211_UNLOCK(ic);
1422 ieee80211_waitfor_parent(ic);
1426 * Start all vap's marked for resume.
1429 ieee80211_resume_all(struct ieee80211com *ic)
1431 struct ieee80211vap *vap;
1434 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1435 struct ifnet *ifp = vap->iv_ifp;
1436 if (!IFNET_IS_UP_RUNNING(ifp) &&
1437 (vap->iv_flags_ext & IEEE80211_FEXT_RESUME)) {
1438 vap->iv_flags_ext &= ~IEEE80211_FEXT_RESUME;
1439 ieee80211_start_locked(vap);
1442 IEEE80211_UNLOCK(ic);
1446 ieee80211_beacon_miss(struct ieee80211com *ic)
1449 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1450 /* Process in a taskq, the handler may reenter the driver */
1451 ieee80211_runtask(ic, &ic->ic_bmiss_task);
1453 IEEE80211_UNLOCK(ic);
1457 beacon_miss(void *arg, int npending)
1459 struct ieee80211com *ic = arg;
1460 struct ieee80211vap *vap;
1463 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1465 * We only pass events through for sta vap's in RUN state;
1466 * may be too restrictive but for now this saves all the
1467 * handlers duplicating these checks.
1469 if (vap->iv_opmode == IEEE80211_M_STA &&
1470 vap->iv_state >= IEEE80211_S_RUN &&
1471 vap->iv_bmiss != NULL)
1474 IEEE80211_UNLOCK(ic);
1478 beacon_swmiss(void *arg, int npending)
1480 struct ieee80211vap *vap = arg;
1481 struct ieee80211com *ic = vap->iv_ic;
1484 if (vap->iv_state == IEEE80211_S_RUN) {
1485 /* XXX Call multiple times if npending > zero? */
1488 IEEE80211_UNLOCK(ic);
1492 * Software beacon miss handling. Check if any beacons
1493 * were received in the last period. If not post a
1494 * beacon miss; otherwise reset the counter.
1497 ieee80211_swbmiss(void *arg)
1499 struct ieee80211vap *vap = arg;
1500 struct ieee80211com *ic = vap->iv_ic;
1502 IEEE80211_LOCK_ASSERT(ic);
1504 /* XXX sleep state? */
1505 KASSERT(vap->iv_state == IEEE80211_S_RUN,
1506 ("wrong state %d", vap->iv_state));
1508 if (ic->ic_flags & IEEE80211_F_SCAN) {
1510 * If scanning just ignore and reset state. If we get a
1511 * bmiss after coming out of scan because we haven't had
1512 * time to receive a beacon then we should probe the AP
1513 * before posting a real bmiss (unless iv_bmiss_max has
1514 * been artifiically lowered). A cleaner solution might
1515 * be to disable the timer on scan start/end but to handle
1516 * case of multiple sta vap's we'd need to disable the
1517 * timers of all affected vap's.
1519 vap->iv_swbmiss_count = 0;
1520 } else if (vap->iv_swbmiss_count == 0) {
1521 if (vap->iv_bmiss != NULL)
1522 ieee80211_runtask(ic, &vap->iv_swbmiss_task);
1524 vap->iv_swbmiss_count = 0;
1525 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period,
1526 ieee80211_swbmiss, vap);
1530 * Start an 802.11h channel switch. We record the parameters,
1531 * mark the operation pending, notify each vap through the
1532 * beacon update mechanism so it can update the beacon frame
1533 * contents, and then switch vap's to CSA state to block outbound
1534 * traffic. Devices that handle CSA directly can use the state
1535 * switch to do the right thing so long as they call
1536 * ieee80211_csa_completeswitch when it's time to complete the
1537 * channel change. Devices that depend on the net80211 layer can
1538 * use ieee80211_beacon_update to handle the countdown and the
1542 ieee80211_csa_startswitch(struct ieee80211com *ic,
1543 struct ieee80211_channel *c, int mode, int count)
1545 struct ieee80211vap *vap;
1547 IEEE80211_LOCK_ASSERT(ic);
1549 ic->ic_csa_newchan = c;
1550 ic->ic_csa_mode = mode;
1551 ic->ic_csa_count = count;
1552 ic->ic_flags |= IEEE80211_F_CSAPENDING;
1553 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1554 if (vap->iv_opmode == IEEE80211_M_HOSTAP ||
1555 vap->iv_opmode == IEEE80211_M_IBSS ||
1556 vap->iv_opmode == IEEE80211_M_MBSS)
1557 ieee80211_beacon_notify(vap, IEEE80211_BEACON_CSA);
1558 /* switch to CSA state to block outbound traffic */
1559 if (vap->iv_state == IEEE80211_S_RUN)
1560 ieee80211_new_state_locked(vap, IEEE80211_S_CSA, 0);
1562 ieee80211_notify_csa(ic, c, mode, count);
1566 * Complete the channel switch by transitioning all CSA VAPs to RUN.
1567 * This is called by both the completion and cancellation functions
1568 * so each VAP is placed back in the RUN state and can thus transmit.
1571 csa_completeswitch(struct ieee80211com *ic)
1573 struct ieee80211vap *vap;
1575 ic->ic_csa_newchan = NULL;
1576 ic->ic_flags &= ~IEEE80211_F_CSAPENDING;
1578 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1579 if (vap->iv_state == IEEE80211_S_CSA)
1580 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0);
1584 * Complete an 802.11h channel switch started by ieee80211_csa_startswitch.
1585 * We clear state and move all vap's in CSA state to RUN state
1586 * so they can again transmit.
1588 * Although this may not be completely correct, update the BSS channel
1589 * for each VAP to the newly configured channel. The setcurchan sets
1590 * the current operating channel for the interface (so the radio does
1591 * switch over) but the VAP BSS isn't updated, leading to incorrectly
1592 * reported information via ioctl.
1595 ieee80211_csa_completeswitch(struct ieee80211com *ic)
1597 struct ieee80211vap *vap;
1599 IEEE80211_LOCK_ASSERT(ic);
1601 KASSERT(ic->ic_flags & IEEE80211_F_CSAPENDING, ("csa not pending"));
1603 ieee80211_setcurchan(ic, ic->ic_csa_newchan);
1604 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1605 if (vap->iv_state == IEEE80211_S_CSA)
1606 vap->iv_bss->ni_chan = ic->ic_curchan;
1608 csa_completeswitch(ic);
1612 * Cancel an 802.11h channel switch started by ieee80211_csa_startswitch.
1613 * We clear state and move all vap's in CSA state to RUN state
1614 * so they can again transmit.
1617 ieee80211_csa_cancelswitch(struct ieee80211com *ic)
1619 IEEE80211_LOCK_ASSERT(ic);
1621 csa_completeswitch(ic);
1625 * Complete a DFS CAC started by ieee80211_dfs_cac_start.
1626 * We clear state and move all vap's in CAC state to RUN state.
1629 ieee80211_cac_completeswitch(struct ieee80211vap *vap0)
1631 struct ieee80211com *ic = vap0->iv_ic;
1632 struct ieee80211vap *vap;
1636 * Complete CAC state change for lead vap first; then
1637 * clock all the other vap's waiting.
1639 KASSERT(vap0->iv_state == IEEE80211_S_CAC,
1640 ("wrong state %d", vap0->iv_state));
1641 ieee80211_new_state_locked(vap0, IEEE80211_S_RUN, 0);
1643 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1644 if (vap->iv_state == IEEE80211_S_CAC)
1645 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0);
1646 IEEE80211_UNLOCK(ic);
1650 * Force all vap's other than the specified vap to the INIT state
1651 * and mark them as waiting for a scan to complete. These vaps
1652 * will be brought up when the scan completes and the scanning vap
1653 * reaches RUN state by wakeupwaiting.
1656 markwaiting(struct ieee80211vap *vap0)
1658 struct ieee80211com *ic = vap0->iv_ic;
1659 struct ieee80211vap *vap;
1661 IEEE80211_LOCK_ASSERT(ic);
1664 * A vap list entry can not disappear since we are running on the
1665 * taskqueue and a vap destroy will queue and drain another state
1668 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1671 if (vap->iv_state != IEEE80211_S_INIT) {
1672 /* NB: iv_newstate may drop the lock */
1673 vap->iv_newstate(vap, IEEE80211_S_INIT, 0);
1674 IEEE80211_LOCK_ASSERT(ic);
1675 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT;
1681 * Wakeup all vap's waiting for a scan to complete. This is the
1682 * companion to markwaiting (above) and is used to coordinate
1683 * multiple vaps scanning.
1684 * This is called from the state taskqueue.
1687 wakeupwaiting(struct ieee80211vap *vap0)
1689 struct ieee80211com *ic = vap0->iv_ic;
1690 struct ieee80211vap *vap;
1692 IEEE80211_LOCK_ASSERT(ic);
1695 * A vap list entry can not disappear since we are running on the
1696 * taskqueue and a vap destroy will queue and drain another state
1699 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1702 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANWAIT) {
1703 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT;
1704 /* NB: sta's cannot go INIT->RUN */
1705 /* NB: iv_newstate may drop the lock */
1706 vap->iv_newstate(vap,
1707 vap->iv_opmode == IEEE80211_M_STA ?
1708 IEEE80211_S_SCAN : IEEE80211_S_RUN, 0);
1709 IEEE80211_LOCK_ASSERT(ic);
1715 * Handle post state change work common to all operating modes.
1718 ieee80211_newstate_cb(void *xvap, int npending)
1720 struct ieee80211vap *vap = xvap;
1721 struct ieee80211com *ic = vap->iv_ic;
1722 enum ieee80211_state nstate, ostate;
1726 nstate = vap->iv_nstate;
1727 arg = vap->iv_nstate_arg;
1729 if (vap->iv_flags_ext & IEEE80211_FEXT_REINIT) {
1731 * We have been requested to drop back to the INIT before
1732 * proceeding to the new state.
1734 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1735 "%s: %s -> %s arg %d\n", __func__,
1736 ieee80211_state_name[vap->iv_state],
1737 ieee80211_state_name[IEEE80211_S_INIT], arg);
1738 vap->iv_newstate(vap, IEEE80211_S_INIT, arg);
1739 IEEE80211_LOCK_ASSERT(ic);
1740 vap->iv_flags_ext &= ~IEEE80211_FEXT_REINIT;
1743 ostate = vap->iv_state;
1744 if (nstate == IEEE80211_S_SCAN && ostate != IEEE80211_S_INIT) {
1746 * SCAN was forced; e.g. on beacon miss. Force other running
1747 * vap's to INIT state and mark them as waiting for the scan to
1748 * complete. This insures they don't interfere with our
1749 * scanning. Since we are single threaded the vaps can not
1750 * transition again while we are executing.
1752 * XXX not always right, assumes ap follows sta
1756 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1757 "%s: %s -> %s arg %d\n", __func__,
1758 ieee80211_state_name[ostate], ieee80211_state_name[nstate], arg);
1760 rc = vap->iv_newstate(vap, nstate, arg);
1761 IEEE80211_LOCK_ASSERT(ic);
1762 vap->iv_flags_ext &= ~IEEE80211_FEXT_STATEWAIT;
1764 /* State transition failed */
1765 KASSERT(rc != EINPROGRESS, ("iv_newstate was deferred"));
1766 KASSERT(nstate != IEEE80211_S_INIT,
1767 ("INIT state change failed"));
1768 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1769 "%s: %s returned error %d\n", __func__,
1770 ieee80211_state_name[nstate], rc);
1774 /* No actual transition, skip post processing */
1775 if (ostate == nstate)
1778 if (nstate == IEEE80211_S_RUN) {
1780 * OACTIVE may be set on the vap if the upper layer
1781 * tried to transmit (e.g. IPv6 NDP) before we reach
1782 * RUN state. Clear it and restart xmit.
1784 * Note this can also happen as a result of SLEEP->RUN
1785 * (i.e. coming out of power save mode).
1787 IF_LOCK(&vap->iv_ifp->if_snd);
1788 vap->iv_ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
1789 IF_UNLOCK(&vap->iv_ifp->if_snd);
1792 * XXX Kick-start a VAP queue - this should be a method,
1795 if_start(vap->iv_ifp);
1797 /* bring up any vaps waiting on us */
1799 } else if (nstate == IEEE80211_S_INIT) {
1801 * Flush the scan cache if we did the last scan (XXX?)
1802 * and flush any frames on send queues from this vap.
1803 * Note the mgt q is used only for legacy drivers and
1804 * will go away shortly.
1806 ieee80211_scan_flush(vap);
1808 /* XXX NB: cast for altq */
1809 ieee80211_flush_ifq((struct ifqueue *)&ic->ic_ifp->if_snd, vap);
1812 IEEE80211_UNLOCK(ic);
1816 * Public interface for initiating a state machine change.
1817 * This routine single-threads the request and coordinates
1818 * the scheduling of multiple vaps for the purpose of selecting
1819 * an operating channel. Specifically the following scenarios
1821 * o only one vap can be selecting a channel so on transition to
1822 * SCAN state if another vap is already scanning then
1823 * mark the caller for later processing and return without
1824 * doing anything (XXX? expectations by caller of synchronous operation)
1825 * o only one vap can be doing CAC of a channel so on transition to
1826 * CAC state if another vap is already scanning for radar then
1827 * mark the caller for later processing and return without
1828 * doing anything (XXX? expectations by caller of synchronous operation)
1829 * o if another vap is already running when a request is made
1830 * to SCAN then an operating channel has been chosen; bypass
1831 * the scan and just join the channel
1833 * Note that the state change call is done through the iv_newstate
1834 * method pointer so any driver routine gets invoked. The driver
1835 * will normally call back into operating mode-specific
1836 * ieee80211_newstate routines (below) unless it needs to completely
1837 * bypass the state machine (e.g. because the firmware has it's
1838 * own idea how things should work). Bypassing the net80211 layer
1839 * is usually a mistake and indicates lack of proper integration
1840 * with the net80211 layer.
1843 ieee80211_new_state_locked(struct ieee80211vap *vap,
1844 enum ieee80211_state nstate, int arg)
1846 struct ieee80211com *ic = vap->iv_ic;
1847 struct ieee80211vap *vp;
1848 enum ieee80211_state ostate;
1849 int nrunning, nscanning;
1851 IEEE80211_LOCK_ASSERT(ic);
1853 if (vap->iv_flags_ext & IEEE80211_FEXT_STATEWAIT) {
1854 if (vap->iv_nstate == IEEE80211_S_INIT) {
1856 * XXX The vap is being stopped, do no allow any other
1857 * state changes until this is completed.
1860 } else if (vap->iv_state != vap->iv_nstate) {
1862 /* Warn if the previous state hasn't completed. */
1863 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1864 "%s: pending %s -> %s transition lost\n", __func__,
1865 ieee80211_state_name[vap->iv_state],
1866 ieee80211_state_name[vap->iv_nstate]);
1868 /* XXX temporarily enable to identify issues */
1869 if_printf(vap->iv_ifp,
1870 "%s: pending %s -> %s transition lost\n",
1871 __func__, ieee80211_state_name[vap->iv_state],
1872 ieee80211_state_name[vap->iv_nstate]);
1877 nrunning = nscanning = 0;
1878 /* XXX can track this state instead of calculating */
1879 TAILQ_FOREACH(vp, &ic->ic_vaps, iv_next) {
1881 if (vp->iv_state >= IEEE80211_S_RUN)
1883 /* XXX doesn't handle bg scan */
1884 /* NB: CAC+AUTH+ASSOC treated like SCAN */
1885 else if (vp->iv_state > IEEE80211_S_INIT)
1889 ostate = vap->iv_state;
1890 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1891 "%s: %s -> %s (nrunning %d nscanning %d)\n", __func__,
1892 ieee80211_state_name[ostate], ieee80211_state_name[nstate],
1893 nrunning, nscanning);
1895 case IEEE80211_S_SCAN:
1896 if (ostate == IEEE80211_S_INIT) {
1898 * INIT -> SCAN happens on initial bringup.
1900 KASSERT(!(nscanning && nrunning),
1901 ("%d scanning and %d running", nscanning, nrunning));
1904 * Someone is scanning, defer our state
1905 * change until the work has completed.
1907 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1908 "%s: defer %s -> %s\n",
1909 __func__, ieee80211_state_name[ostate],
1910 ieee80211_state_name[nstate]);
1911 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT;
1916 * Someone is operating; just join the channel
1920 /* XXX check each opmode, adhoc? */
1921 if (vap->iv_opmode == IEEE80211_M_STA)
1922 nstate = IEEE80211_S_SCAN;
1924 nstate = IEEE80211_S_RUN;
1925 #ifdef IEEE80211_DEBUG
1926 if (nstate != IEEE80211_S_SCAN) {
1927 IEEE80211_DPRINTF(vap,
1928 IEEE80211_MSG_STATE,
1929 "%s: override, now %s -> %s\n",
1931 ieee80211_state_name[ostate],
1932 ieee80211_state_name[nstate]);
1938 case IEEE80211_S_RUN:
1939 if (vap->iv_opmode == IEEE80211_M_WDS &&
1940 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) &&
1943 * Legacy WDS with someone else scanning; don't
1944 * go online until that completes as we should
1945 * follow the other vap to the channel they choose.
1947 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1948 "%s: defer %s -> %s (legacy WDS)\n", __func__,
1949 ieee80211_state_name[ostate],
1950 ieee80211_state_name[nstate]);
1951 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT;
1954 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
1955 IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) &&
1956 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) &&
1957 !IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) {
1959 * This is a DFS channel, transition to CAC state
1960 * instead of RUN. This allows us to initiate
1961 * Channel Availability Check (CAC) as specified
1964 nstate = IEEE80211_S_CAC;
1965 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1966 "%s: override %s -> %s (DFS)\n", __func__,
1967 ieee80211_state_name[ostate],
1968 ieee80211_state_name[nstate]);
1971 case IEEE80211_S_INIT:
1972 /* cancel any scan in progress */
1973 ieee80211_cancel_scan(vap);
1974 if (ostate == IEEE80211_S_INIT ) {
1975 /* XXX don't believe this */
1976 /* INIT -> INIT. nothing to do */
1977 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT;
1983 /* defer the state change to a thread */
1984 vap->iv_nstate = nstate;
1985 vap->iv_nstate_arg = arg;
1986 vap->iv_flags_ext |= IEEE80211_FEXT_STATEWAIT;
1987 ieee80211_runtask(ic, &vap->iv_nstate_task);
1992 ieee80211_new_state(struct ieee80211vap *vap,
1993 enum ieee80211_state nstate, int arg)
1995 struct ieee80211com *ic = vap->iv_ic;
1999 rc = ieee80211_new_state_locked(vap, nstate, arg);
2000 IEEE80211_UNLOCK(ic);