2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2001 Atsushi Onoe
5 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
6 * Copyright (c) 2012 IEEE
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
34 * IEEE 802.11 protocol support.
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/kernel.h>
43 #include <sys/malloc.h>
45 #include <sys/socket.h>
46 #include <sys/sockio.h>
49 #include <net/if_var.h>
50 #include <net/if_media.h>
51 #include <net/ethernet.h> /* XXX for ether_sprintf */
53 #include <net80211/ieee80211_var.h>
54 #include <net80211/ieee80211_adhoc.h>
55 #include <net80211/ieee80211_sta.h>
56 #include <net80211/ieee80211_hostap.h>
57 #include <net80211/ieee80211_wds.h>
58 #ifdef IEEE80211_SUPPORT_MESH
59 #include <net80211/ieee80211_mesh.h>
61 #include <net80211/ieee80211_monitor.h>
62 #include <net80211/ieee80211_input.h>
65 #define AGGRESSIVE_MODE_SWITCH_HYSTERESIS 3 /* pkts / 100ms */
66 #define HIGH_PRI_SWITCH_THRESH 10 /* pkts / 100ms */
68 const char *mgt_subtype_name[] = {
69 "assoc_req", "assoc_resp", "reassoc_req", "reassoc_resp",
70 "probe_req", "probe_resp", "timing_adv", "reserved#7",
71 "beacon", "atim", "disassoc", "auth",
72 "deauth", "action", "action_noack", "reserved#15"
74 const char *ctl_subtype_name[] = {
75 "reserved#0", "reserved#1", "reserved#2", "reserved#3",
76 "reserved#4", "reserved#5", "reserved#6", "control_wrap",
77 "bar", "ba", "ps_poll", "rts",
78 "cts", "ack", "cf_end", "cf_end_ack"
80 const char *ieee80211_opmode_name[IEEE80211_OPMODE_MAX] = {
81 "IBSS", /* IEEE80211_M_IBSS */
82 "STA", /* IEEE80211_M_STA */
83 "WDS", /* IEEE80211_M_WDS */
84 "AHDEMO", /* IEEE80211_M_AHDEMO */
85 "HOSTAP", /* IEEE80211_M_HOSTAP */
86 "MONITOR", /* IEEE80211_M_MONITOR */
87 "MBSS" /* IEEE80211_M_MBSS */
89 const char *ieee80211_state_name[IEEE80211_S_MAX] = {
90 "INIT", /* IEEE80211_S_INIT */
91 "SCAN", /* IEEE80211_S_SCAN */
92 "AUTH", /* IEEE80211_S_AUTH */
93 "ASSOC", /* IEEE80211_S_ASSOC */
94 "CAC", /* IEEE80211_S_CAC */
95 "RUN", /* IEEE80211_S_RUN */
96 "CSA", /* IEEE80211_S_CSA */
97 "SLEEP", /* IEEE80211_S_SLEEP */
99 const char *ieee80211_wme_acnames[] = {
109 * Reason code descriptions were (mostly) obtained from
110 * IEEE Std 802.11-2012, pp. 442-445 Table 8-36.
113 ieee80211_reason_to_string(uint16_t reason)
116 case IEEE80211_REASON_UNSPECIFIED:
117 return ("unspecified");
118 case IEEE80211_REASON_AUTH_EXPIRE:
119 return ("previous authentication is expired");
120 case IEEE80211_REASON_AUTH_LEAVE:
121 return ("sending STA is leaving/has left IBSS or ESS");
122 case IEEE80211_REASON_ASSOC_EXPIRE:
123 return ("disassociated due to inactivity");
124 case IEEE80211_REASON_ASSOC_TOOMANY:
125 return ("too many associated STAs");
126 case IEEE80211_REASON_NOT_AUTHED:
127 return ("class 2 frame received from nonauthenticated STA");
128 case IEEE80211_REASON_NOT_ASSOCED:
129 return ("class 3 frame received from nonassociated STA");
130 case IEEE80211_REASON_ASSOC_LEAVE:
131 return ("sending STA is leaving/has left BSS");
132 case IEEE80211_REASON_ASSOC_NOT_AUTHED:
133 return ("STA requesting (re)association is not authenticated");
134 case IEEE80211_REASON_DISASSOC_PWRCAP_BAD:
135 return ("information in the Power Capability element is "
137 case IEEE80211_REASON_DISASSOC_SUPCHAN_BAD:
138 return ("information in the Supported Channels element is "
140 case IEEE80211_REASON_IE_INVALID:
141 return ("invalid element");
142 case IEEE80211_REASON_MIC_FAILURE:
143 return ("MIC failure");
144 case IEEE80211_REASON_4WAY_HANDSHAKE_TIMEOUT:
145 return ("4-Way handshake timeout");
146 case IEEE80211_REASON_GROUP_KEY_UPDATE_TIMEOUT:
147 return ("group key update timeout");
148 case IEEE80211_REASON_IE_IN_4WAY_DIFFERS:
149 return ("element in 4-Way handshake different from "
150 "(re)association request/probe response/beacon frame");
151 case IEEE80211_REASON_GROUP_CIPHER_INVALID:
152 return ("invalid group cipher");
153 case IEEE80211_REASON_PAIRWISE_CIPHER_INVALID:
154 return ("invalid pairwise cipher");
155 case IEEE80211_REASON_AKMP_INVALID:
156 return ("invalid AKMP");
157 case IEEE80211_REASON_UNSUPP_RSN_IE_VERSION:
158 return ("unsupported version in RSN IE");
159 case IEEE80211_REASON_INVALID_RSN_IE_CAP:
160 return ("invalid capabilities in RSN IE");
161 case IEEE80211_REASON_802_1X_AUTH_FAILED:
162 return ("IEEE 802.1X authentication failed");
163 case IEEE80211_REASON_CIPHER_SUITE_REJECTED:
164 return ("cipher suite rejected because of the security "
166 case IEEE80211_REASON_UNSPECIFIED_QOS:
167 return ("unspecified (QoS-related)");
168 case IEEE80211_REASON_INSUFFICIENT_BW:
169 return ("QoS AP lacks sufficient bandwidth for this QoS STA");
170 case IEEE80211_REASON_TOOMANY_FRAMES:
171 return ("too many frames need to be acknowledged");
172 case IEEE80211_REASON_OUTSIDE_TXOP:
173 return ("STA is transmitting outside the limits of its TXOPs");
174 case IEEE80211_REASON_LEAVING_QBSS:
175 return ("requested from peer STA (the STA is "
176 "resetting/leaving the BSS)");
177 case IEEE80211_REASON_BAD_MECHANISM:
178 return ("requested from peer STA (it does not want to use "
180 case IEEE80211_REASON_SETUP_NEEDED:
181 return ("requested from peer STA (setup is required for the "
183 case IEEE80211_REASON_TIMEOUT:
184 return ("requested from peer STA (timeout)");
185 case IEEE80211_REASON_PEER_LINK_CANCELED:
186 return ("SME cancels the mesh peering instance (not related "
187 "to the maximum number of peer mesh STAs)");
188 case IEEE80211_REASON_MESH_MAX_PEERS:
189 return ("maximum number of peer mesh STAs was reached");
190 case IEEE80211_REASON_MESH_CPVIOLATION:
191 return ("the received information violates the Mesh "
192 "Configuration policy configured in the mesh STA "
194 case IEEE80211_REASON_MESH_CLOSE_RCVD:
195 return ("the mesh STA has received a Mesh Peering Close "
196 "message requesting to close the mesh peering");
197 case IEEE80211_REASON_MESH_MAX_RETRIES:
198 return ("the mesh STA has resent dot11MeshMaxRetries Mesh "
199 "Peering Open messages, without receiving a Mesh "
200 "Peering Confirm message");
201 case IEEE80211_REASON_MESH_CONFIRM_TIMEOUT:
202 return ("the confirmTimer for the mesh peering instance times "
204 case IEEE80211_REASON_MESH_INVALID_GTK:
205 return ("the mesh STA fails to unwrap the GTK or the values "
206 "in the wrapped contents do not match");
207 case IEEE80211_REASON_MESH_INCONS_PARAMS:
208 return ("the mesh STA receives inconsistent information about "
209 "the mesh parameters between Mesh Peering Management "
211 case IEEE80211_REASON_MESH_INVALID_SECURITY:
212 return ("the mesh STA fails the authenticated mesh peering "
213 "exchange because due to failure in selecting "
214 "pairwise/group ciphersuite");
215 case IEEE80211_REASON_MESH_PERR_NO_PROXY:
216 return ("the mesh STA does not have proxy information for "
217 "this external destination");
218 case IEEE80211_REASON_MESH_PERR_NO_FI:
219 return ("the mesh STA does not have forwarding information "
220 "for this destination");
221 case IEEE80211_REASON_MESH_PERR_DEST_UNREACH:
222 return ("the mesh STA determines that the link to the next "
223 "hop of an active path in its forwarding information "
224 "is no longer usable");
225 case IEEE80211_REASON_MESH_MAC_ALRDY_EXISTS_MBSS:
226 return ("the MAC address of the STA already exists in the "
228 case IEEE80211_REASON_MESH_CHAN_SWITCH_REG:
229 return ("the mesh STA performs channel switch to meet "
230 "regulatory requirements");
231 case IEEE80211_REASON_MESH_CHAN_SWITCH_UNSPEC:
232 return ("the mesh STA performs channel switch with "
233 "unspecified reason");
235 return ("reserved/unknown");
239 static void beacon_miss(void *, int);
240 static void beacon_swmiss(void *, int);
241 static void parent_updown(void *, int);
242 static void update_mcast(void *, int);
243 static void update_promisc(void *, int);
244 static void update_channel(void *, int);
245 static void update_chw(void *, int);
246 static void vap_update_wme(void *, int);
247 static void vap_update_slot(void *, int);
248 static void restart_vaps(void *, int);
249 static void ieee80211_newstate_cb(void *, int);
252 null_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
253 const struct ieee80211_bpf_params *params)
256 ic_printf(ni->ni_ic, "missing ic_raw_xmit callback, drop frame\n");
262 ieee80211_proto_attach(struct ieee80211com *ic)
266 /* override the 802.3 setting */
267 hdrlen = ic->ic_headroom
268 + sizeof(struct ieee80211_qosframe_addr4)
269 + IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN
270 + IEEE80211_WEP_EXTIVLEN;
271 /* XXX no way to recalculate on ifdetach */
272 if (ALIGN(hdrlen) > max_linkhdr) {
273 /* XXX sanity check... */
274 max_linkhdr = ALIGN(hdrlen);
275 max_hdr = max_linkhdr + max_protohdr;
276 max_datalen = MHLEN - max_hdr;
278 ic->ic_protmode = IEEE80211_PROT_CTSONLY;
280 TASK_INIT(&ic->ic_parent_task, 0, parent_updown, ic);
281 TASK_INIT(&ic->ic_mcast_task, 0, update_mcast, ic);
282 TASK_INIT(&ic->ic_promisc_task, 0, update_promisc, ic);
283 TASK_INIT(&ic->ic_chan_task, 0, update_channel, ic);
284 TASK_INIT(&ic->ic_bmiss_task, 0, beacon_miss, ic);
285 TASK_INIT(&ic->ic_chw_task, 0, update_chw, ic);
286 TASK_INIT(&ic->ic_restart_task, 0, restart_vaps, ic);
288 ic->ic_wme.wme_hipri_switch_hysteresis =
289 AGGRESSIVE_MODE_SWITCH_HYSTERESIS;
291 /* initialize management frame handlers */
292 ic->ic_send_mgmt = ieee80211_send_mgmt;
293 ic->ic_raw_xmit = null_raw_xmit;
295 ieee80211_adhoc_attach(ic);
296 ieee80211_sta_attach(ic);
297 ieee80211_wds_attach(ic);
298 ieee80211_hostap_attach(ic);
299 #ifdef IEEE80211_SUPPORT_MESH
300 ieee80211_mesh_attach(ic);
302 ieee80211_monitor_attach(ic);
306 ieee80211_proto_detach(struct ieee80211com *ic)
308 ieee80211_monitor_detach(ic);
309 #ifdef IEEE80211_SUPPORT_MESH
310 ieee80211_mesh_detach(ic);
312 ieee80211_hostap_detach(ic);
313 ieee80211_wds_detach(ic);
314 ieee80211_adhoc_detach(ic);
315 ieee80211_sta_detach(ic);
319 null_update_beacon(struct ieee80211vap *vap, int item)
324 ieee80211_proto_vattach(struct ieee80211vap *vap)
326 struct ieee80211com *ic = vap->iv_ic;
327 struct ifnet *ifp = vap->iv_ifp;
330 /* override the 802.3 setting */
331 ifp->if_hdrlen = ic->ic_headroom
332 + sizeof(struct ieee80211_qosframe_addr4)
333 + IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN
334 + IEEE80211_WEP_EXTIVLEN;
336 vap->iv_rtsthreshold = IEEE80211_RTS_DEFAULT;
337 vap->iv_fragthreshold = IEEE80211_FRAG_DEFAULT;
338 vap->iv_bmiss_max = IEEE80211_BMISS_MAX;
339 callout_init_mtx(&vap->iv_swbmiss, IEEE80211_LOCK_OBJ(ic), 0);
340 callout_init(&vap->iv_mgtsend, 1);
341 TASK_INIT(&vap->iv_nstate_task, 0, ieee80211_newstate_cb, vap);
342 TASK_INIT(&vap->iv_swbmiss_task, 0, beacon_swmiss, vap);
343 TASK_INIT(&vap->iv_wme_task, 0, vap_update_wme, vap);
344 TASK_INIT(&vap->iv_slot_task, 0, vap_update_slot, vap);
346 * Install default tx rate handling: no fixed rate, lowest
347 * supported rate for mgmt and multicast frames. Default
348 * max retry count. These settings can be changed by the
349 * driver and/or user applications.
351 for (i = IEEE80211_MODE_11A; i < IEEE80211_MODE_MAX; i++) {
352 if (isclr(ic->ic_modecaps, i))
355 const struct ieee80211_rateset *rs = &ic->ic_sup_rates[i];
357 vap->iv_txparms[i].ucastrate = IEEE80211_FIXED_RATE_NONE;
360 * Setting the management rate to MCS 0 assumes that the
361 * BSS Basic rate set is empty and the BSS Basic MCS set
364 * Since we're not checking this, default to the lowest
365 * defined rate for this mode.
367 * At least one 11n AP (DLINK DIR-825) is reported to drop
368 * some MCS management traffic (eg BA response frames.)
370 * See also: 9.6.0 of the 802.11n-2009 specification.
373 if (i == IEEE80211_MODE_11NA || i == IEEE80211_MODE_11NG) {
374 vap->iv_txparms[i].mgmtrate = 0 | IEEE80211_RATE_MCS;
375 vap->iv_txparms[i].mcastrate = 0 | IEEE80211_RATE_MCS;
377 vap->iv_txparms[i].mgmtrate =
378 rs->rs_rates[0] & IEEE80211_RATE_VAL;
379 vap->iv_txparms[i].mcastrate =
380 rs->rs_rates[0] & IEEE80211_RATE_VAL;
383 vap->iv_txparms[i].mgmtrate = rs->rs_rates[0] & IEEE80211_RATE_VAL;
384 vap->iv_txparms[i].mcastrate = rs->rs_rates[0] & IEEE80211_RATE_VAL;
385 vap->iv_txparms[i].maxretry = IEEE80211_TXMAX_DEFAULT;
387 vap->iv_roaming = IEEE80211_ROAMING_AUTO;
389 vap->iv_update_beacon = null_update_beacon;
390 vap->iv_deliver_data = ieee80211_deliver_data;
392 /* attach support for operating mode */
393 ic->ic_vattach[vap->iv_opmode](vap);
397 ieee80211_proto_vdetach(struct ieee80211vap *vap)
399 #define FREEAPPIE(ie) do { \
401 IEEE80211_FREE(ie, M_80211_NODE_IE); \
404 * Detach operating mode module.
406 if (vap->iv_opdetach != NULL)
407 vap->iv_opdetach(vap);
409 * This should not be needed as we detach when reseting
410 * the state but be conservative here since the
411 * authenticator may do things like spawn kernel threads.
413 if (vap->iv_auth->ia_detach != NULL)
414 vap->iv_auth->ia_detach(vap);
416 * Detach any ACL'ator.
418 if (vap->iv_acl != NULL)
419 vap->iv_acl->iac_detach(vap);
421 FREEAPPIE(vap->iv_appie_beacon);
422 FREEAPPIE(vap->iv_appie_probereq);
423 FREEAPPIE(vap->iv_appie_proberesp);
424 FREEAPPIE(vap->iv_appie_assocreq);
425 FREEAPPIE(vap->iv_appie_assocresp);
426 FREEAPPIE(vap->iv_appie_wpa);
431 * Simple-minded authenticator module support.
434 #define IEEE80211_AUTH_MAX (IEEE80211_AUTH_WPA+1)
435 /* XXX well-known names */
436 static const char *auth_modnames[IEEE80211_AUTH_MAX] = {
437 "wlan_internal", /* IEEE80211_AUTH_NONE */
438 "wlan_internal", /* IEEE80211_AUTH_OPEN */
439 "wlan_internal", /* IEEE80211_AUTH_SHARED */
440 "wlan_xauth", /* IEEE80211_AUTH_8021X */
441 "wlan_internal", /* IEEE80211_AUTH_AUTO */
442 "wlan_xauth", /* IEEE80211_AUTH_WPA */
444 static const struct ieee80211_authenticator *authenticators[IEEE80211_AUTH_MAX];
446 static const struct ieee80211_authenticator auth_internal = {
447 .ia_name = "wlan_internal",
450 .ia_node_join = NULL,
451 .ia_node_leave = NULL,
455 * Setup internal authenticators once; they are never unregistered.
458 ieee80211_auth_setup(void)
460 ieee80211_authenticator_register(IEEE80211_AUTH_OPEN, &auth_internal);
461 ieee80211_authenticator_register(IEEE80211_AUTH_SHARED, &auth_internal);
462 ieee80211_authenticator_register(IEEE80211_AUTH_AUTO, &auth_internal);
464 SYSINIT(wlan_auth, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_auth_setup, NULL);
466 const struct ieee80211_authenticator *
467 ieee80211_authenticator_get(int auth)
469 if (auth >= IEEE80211_AUTH_MAX)
471 if (authenticators[auth] == NULL)
472 ieee80211_load_module(auth_modnames[auth]);
473 return authenticators[auth];
477 ieee80211_authenticator_register(int type,
478 const struct ieee80211_authenticator *auth)
480 if (type >= IEEE80211_AUTH_MAX)
482 authenticators[type] = auth;
486 ieee80211_authenticator_unregister(int type)
489 if (type >= IEEE80211_AUTH_MAX)
491 authenticators[type] = NULL;
495 * Very simple-minded ACL module support.
497 /* XXX just one for now */
498 static const struct ieee80211_aclator *acl = NULL;
501 ieee80211_aclator_register(const struct ieee80211_aclator *iac)
503 printf("wlan: %s acl policy registered\n", iac->iac_name);
508 ieee80211_aclator_unregister(const struct ieee80211_aclator *iac)
512 printf("wlan: %s acl policy unregistered\n", iac->iac_name);
515 const struct ieee80211_aclator *
516 ieee80211_aclator_get(const char *name)
519 ieee80211_load_module("wlan_acl");
520 return acl != NULL && strcmp(acl->iac_name, name) == 0 ? acl : NULL;
524 ieee80211_print_essid(const uint8_t *essid, int len)
529 if (len > IEEE80211_NWID_LEN)
530 len = IEEE80211_NWID_LEN;
531 /* determine printable or not */
532 for (i = 0, p = essid; i < len; i++, p++) {
533 if (*p < ' ' || *p > 0x7e)
538 for (i = 0, p = essid; i < len; i++, p++)
543 for (i = 0, p = essid; i < len; i++, p++)
549 ieee80211_dump_pkt(struct ieee80211com *ic,
550 const uint8_t *buf, int len, int rate, int rssi)
552 const struct ieee80211_frame *wh;
555 wh = (const struct ieee80211_frame *)buf;
556 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) {
557 case IEEE80211_FC1_DIR_NODS:
558 printf("NODS %s", ether_sprintf(wh->i_addr2));
559 printf("->%s", ether_sprintf(wh->i_addr1));
560 printf("(%s)", ether_sprintf(wh->i_addr3));
562 case IEEE80211_FC1_DIR_TODS:
563 printf("TODS %s", ether_sprintf(wh->i_addr2));
564 printf("->%s", ether_sprintf(wh->i_addr3));
565 printf("(%s)", ether_sprintf(wh->i_addr1));
567 case IEEE80211_FC1_DIR_FROMDS:
568 printf("FRDS %s", ether_sprintf(wh->i_addr3));
569 printf("->%s", ether_sprintf(wh->i_addr1));
570 printf("(%s)", ether_sprintf(wh->i_addr2));
572 case IEEE80211_FC1_DIR_DSTODS:
573 printf("DSDS %s", ether_sprintf((const uint8_t *)&wh[1]));
574 printf("->%s", ether_sprintf(wh->i_addr3));
575 printf("(%s", ether_sprintf(wh->i_addr2));
576 printf("->%s)", ether_sprintf(wh->i_addr1));
579 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) {
580 case IEEE80211_FC0_TYPE_DATA:
583 case IEEE80211_FC0_TYPE_MGT:
584 printf(" %s", ieee80211_mgt_subtype_name(wh->i_fc[0]));
587 printf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK);
590 if (IEEE80211_QOS_HAS_SEQ(wh)) {
591 const struct ieee80211_qosframe *qwh =
592 (const struct ieee80211_qosframe *)buf;
593 printf(" QoS [TID %u%s]", qwh->i_qos[0] & IEEE80211_QOS_TID,
594 qwh->i_qos[0] & IEEE80211_QOS_ACKPOLICY ? " ACM" : "");
596 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
599 off = ieee80211_anyhdrspace(ic, wh);
600 printf(" WEP [IV %.02x %.02x %.02x",
601 buf[off+0], buf[off+1], buf[off+2]);
602 if (buf[off+IEEE80211_WEP_IVLEN] & IEEE80211_WEP_EXTIV)
603 printf(" %.02x %.02x %.02x",
604 buf[off+4], buf[off+5], buf[off+6]);
605 printf(" KID %u]", buf[off+IEEE80211_WEP_IVLEN] >> 6);
608 printf(" %dM", rate / 2);
610 printf(" +%d", rssi);
613 for (i = 0; i < len; i++) {
616 printf("%02x", buf[i]);
623 findrix(const struct ieee80211_rateset *rs, int r)
627 for (i = 0; i < rs->rs_nrates; i++)
628 if ((rs->rs_rates[i] & IEEE80211_RATE_VAL) == r)
634 ieee80211_fix_rate(struct ieee80211_node *ni,
635 struct ieee80211_rateset *nrs, int flags)
637 struct ieee80211vap *vap = ni->ni_vap;
638 struct ieee80211com *ic = ni->ni_ic;
639 int i, j, rix, error;
640 int okrate, badrate, fixedrate, ucastrate;
641 const struct ieee80211_rateset *srs;
645 okrate = badrate = 0;
646 ucastrate = vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)].ucastrate;
647 if (ucastrate != IEEE80211_FIXED_RATE_NONE) {
649 * Workaround awkwardness with fixed rate. We are called
650 * to check both the legacy rate set and the HT rate set
651 * but we must apply any legacy fixed rate check only to the
652 * legacy rate set and vice versa. We cannot tell what type
653 * of rate set we've been given (legacy or HT) but we can
654 * distinguish the fixed rate type (MCS have 0x80 set).
655 * So to deal with this the caller communicates whether to
656 * check MCS or legacy rate using the flags and we use the
657 * type of any fixed rate to avoid applying an MCS to a
658 * legacy rate and vice versa.
660 if (ucastrate & 0x80) {
661 if (flags & IEEE80211_F_DOFRATE)
662 flags &= ~IEEE80211_F_DOFRATE;
663 } else if ((ucastrate & 0x80) == 0) {
664 if (flags & IEEE80211_F_DOFMCS)
665 flags &= ~IEEE80211_F_DOFMCS;
667 /* NB: required to make MCS match below work */
668 ucastrate &= IEEE80211_RATE_VAL;
670 fixedrate = IEEE80211_FIXED_RATE_NONE;
672 * XXX we are called to process both MCS and legacy rates;
673 * we must use the appropriate basic rate set or chaos will
674 * ensue; for now callers that want MCS must supply
675 * IEEE80211_F_DOBRS; at some point we'll need to split this
676 * function so there are two variants, one for MCS and one
679 if (flags & IEEE80211_F_DOBRS)
680 srs = (const struct ieee80211_rateset *)
681 ieee80211_get_suphtrates(ic, ni->ni_chan);
683 srs = ieee80211_get_suprates(ic, ni->ni_chan);
684 for (i = 0; i < nrs->rs_nrates; ) {
685 if (flags & IEEE80211_F_DOSORT) {
689 for (j = i + 1; j < nrs->rs_nrates; j++) {
690 if (IEEE80211_RV(nrs->rs_rates[i]) >
691 IEEE80211_RV(nrs->rs_rates[j])) {
692 r = nrs->rs_rates[i];
693 nrs->rs_rates[i] = nrs->rs_rates[j];
694 nrs->rs_rates[j] = r;
698 r = nrs->rs_rates[i] & IEEE80211_RATE_VAL;
701 * Check for fixed rate.
706 * Check against supported rates.
708 rix = findrix(srs, r);
709 if (flags & IEEE80211_F_DONEGO) {
712 * A rate in the node's rate set is not
713 * supported. If this is a basic rate and we
714 * are operating as a STA then this is an error.
715 * Otherwise we just discard/ignore the rate.
717 if ((flags & IEEE80211_F_JOIN) &&
718 (nrs->rs_rates[i] & IEEE80211_RATE_BASIC))
720 } else if ((flags & IEEE80211_F_JOIN) == 0) {
722 * Overwrite with the supported rate
723 * value so any basic rate bit is set.
725 nrs->rs_rates[i] = srs->rs_rates[rix];
728 if ((flags & IEEE80211_F_DODEL) && rix < 0) {
730 * Delete unacceptable rates.
733 for (j = i; j < nrs->rs_nrates; j++)
734 nrs->rs_rates[j] = nrs->rs_rates[j + 1];
735 nrs->rs_rates[j] = 0;
739 okrate = nrs->rs_rates[i];
742 if (okrate == 0 || error != 0 ||
743 ((flags & (IEEE80211_F_DOFRATE|IEEE80211_F_DOFMCS)) &&
744 fixedrate != ucastrate)) {
745 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni,
746 "%s: flags 0x%x okrate %d error %d fixedrate 0x%x "
747 "ucastrate %x\n", __func__, fixedrate, ucastrate, flags);
748 return badrate | IEEE80211_RATE_BASIC;
750 return IEEE80211_RV(okrate);
754 * Reset 11g-related state.
756 * This is for per-VAP ERP/11g state.
758 * Eventually everything in ieee80211_reset_erp() will be
759 * per-VAP and in here.
762 ieee80211_vap_reset_erp(struct ieee80211vap *vap)
764 struct ieee80211com *ic = vap->iv_ic;
767 * Short slot time is enabled only when operating in 11g
768 * and not in an IBSS. We must also honor whether or not
769 * the driver is capable of doing it.
771 ieee80211_vap_set_shortslottime(vap,
772 IEEE80211_IS_CHAN_A(ic->ic_curchan) ||
773 IEEE80211_IS_CHAN_HT(ic->ic_curchan) ||
774 (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
775 vap->iv_opmode == IEEE80211_M_HOSTAP &&
776 (ic->ic_caps & IEEE80211_C_SHSLOT)));
780 * Reset 11g-related state.
783 ieee80211_reset_erp(struct ieee80211com *ic)
785 ic->ic_flags &= ~IEEE80211_F_USEPROT;
786 ic->ic_nonerpsta = 0;
787 ic->ic_longslotsta = 0;
789 * Set short preamble and ERP barker-preamble flags.
791 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) ||
792 (ic->ic_caps & IEEE80211_C_SHPREAMBLE)) {
793 ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
794 ic->ic_flags &= ~IEEE80211_F_USEBARKER;
796 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
797 ic->ic_flags |= IEEE80211_F_USEBARKER;
802 * Deferred slot time update.
804 * For per-VAP slot time configuration, call the VAP
805 * method if the VAP requires it. Otherwise, just call the
806 * older global method.
808 * If the per-VAP method is called then it's expected that
809 * the driver/firmware will take care of turning the per-VAP
810 * flags into slot time configuration.
812 * If the per-VAP method is not called then the global flags will be
813 * flipped into sync with the VAPs; ic_flags IEEE80211_F_SHSLOT will
814 * be set only if all of the vaps will have it set.
817 vap_update_slot(void *arg, int npending)
819 struct ieee80211vap *vap = arg;
820 struct ieee80211com *ic = vap->iv_ic;
821 struct ieee80211vap *iv;
822 int num_shslot = 0, num_lgslot = 0;
825 * Per-VAP path - we've already had the flags updated;
826 * so just notify the driver and move on.
828 if (vap->iv_updateslot != NULL) {
829 vap->iv_updateslot(vap);
834 * Iterate over all of the VAP flags to update the
837 * If all vaps have short slot enabled then flip on
838 * short slot. If any vap has it disabled then
839 * we leave it globally disabled. This should provide
840 * correct behaviour in a multi-BSS scenario where
841 * at least one VAP has short slot disabled for some
845 TAILQ_FOREACH(iv, &ic->ic_vaps, iv_next) {
846 if (iv->iv_flags & IEEE80211_F_SHSLOT)
851 IEEE80211_UNLOCK(ic);
854 * It looks backwards but - if the number of short slot VAPs
855 * is zero then we're not short slot. Else, we have one
856 * or more short slot VAPs and we're checking to see if ANY
857 * of them have short slot disabled.
860 ic->ic_flags &= ~IEEE80211_F_SHSLOT;
861 else if (num_lgslot == 0)
862 ic->ic_flags |= IEEE80211_F_SHSLOT;
865 * Call the driver with our new global slot time flags.
867 if (ic->ic_updateslot != NULL)
868 ic->ic_updateslot(ic);
872 * Set the short slot time state and notify the driver.
874 * This is the per-VAP slot time state.
877 ieee80211_vap_set_shortslottime(struct ieee80211vap *vap, int onoff)
879 struct ieee80211com *ic = vap->iv_ic;
882 * Only modify the per-VAP slot time.
885 vap->iv_flags |= IEEE80211_F_SHSLOT;
887 vap->iv_flags &= ~IEEE80211_F_SHSLOT;
889 /* schedule the deferred slot flag update and update */
890 ieee80211_runtask(ic, &vap->iv_slot_task);
894 * Check if the specified rate set supports ERP.
895 * NB: the rate set is assumed to be sorted.
898 ieee80211_iserp_rateset(const struct ieee80211_rateset *rs)
900 static const int rates[] = { 2, 4, 11, 22, 12, 24, 48 };
903 if (rs->rs_nrates < nitems(rates))
905 for (i = 0; i < nitems(rates); i++) {
906 for (j = 0; j < rs->rs_nrates; j++) {
907 int r = rs->rs_rates[j] & IEEE80211_RATE_VAL;
921 * Mark the basic rates for the rate table based on the
922 * operating mode. For real 11g we mark all the 11b rates
923 * and 6, 12, and 24 OFDM. For 11b compatibility we mark only
924 * 11b rates. There's also a pseudo 11a-mode used to mark only
925 * the basic OFDM rates.
928 setbasicrates(struct ieee80211_rateset *rs,
929 enum ieee80211_phymode mode, int add)
931 static const struct ieee80211_rateset basic[IEEE80211_MODE_MAX] = {
932 [IEEE80211_MODE_11A] = { 3, { 12, 24, 48 } },
933 [IEEE80211_MODE_11B] = { 2, { 2, 4 } },
935 [IEEE80211_MODE_11G] = { 4, { 2, 4, 11, 22 } },
936 [IEEE80211_MODE_TURBO_A] = { 3, { 12, 24, 48 } },
937 [IEEE80211_MODE_TURBO_G] = { 4, { 2, 4, 11, 22 } },
938 [IEEE80211_MODE_STURBO_A] = { 3, { 12, 24, 48 } },
939 [IEEE80211_MODE_HALF] = { 3, { 6, 12, 24 } },
940 [IEEE80211_MODE_QUARTER] = { 3, { 3, 6, 12 } },
941 [IEEE80211_MODE_11NA] = { 3, { 12, 24, 48 } },
943 [IEEE80211_MODE_11NG] = { 4, { 2, 4, 11, 22 } },
945 [IEEE80211_MODE_VHT_2GHZ] = { 4, { 2, 4, 11, 22 } },
946 [IEEE80211_MODE_VHT_5GHZ] = { 3, { 12, 24, 48 } },
950 for (i = 0; i < rs->rs_nrates; i++) {
952 rs->rs_rates[i] &= IEEE80211_RATE_VAL;
953 for (j = 0; j < basic[mode].rs_nrates; j++)
954 if (basic[mode].rs_rates[j] == rs->rs_rates[i]) {
955 rs->rs_rates[i] |= IEEE80211_RATE_BASIC;
962 * Set the basic rates in a rate set.
965 ieee80211_setbasicrates(struct ieee80211_rateset *rs,
966 enum ieee80211_phymode mode)
968 setbasicrates(rs, mode, 0);
972 * Add basic rates to a rate set.
975 ieee80211_addbasicrates(struct ieee80211_rateset *rs,
976 enum ieee80211_phymode mode)
978 setbasicrates(rs, mode, 1);
982 * WME protocol support.
984 * The default 11a/b/g/n parameters come from the WiFi Alliance WMM
985 * System Interopability Test Plan (v1.4, Appendix F) and the 802.11n
986 * Draft 2.0 Test Plan (Appendix D).
988 * Static/Dynamic Turbo mode settings come from Atheros.
990 typedef struct phyParamType {
998 static const struct phyParamType phyParamForAC_BE[IEEE80211_MODE_MAX] = {
999 [IEEE80211_MODE_AUTO] = { 3, 4, 6, 0, 0 },
1000 [IEEE80211_MODE_11A] = { 3, 4, 6, 0, 0 },
1001 [IEEE80211_MODE_11B] = { 3, 4, 6, 0, 0 },
1002 [IEEE80211_MODE_11G] = { 3, 4, 6, 0, 0 },
1003 [IEEE80211_MODE_FH] = { 3, 4, 6, 0, 0 },
1004 [IEEE80211_MODE_TURBO_A]= { 2, 3, 5, 0, 0 },
1005 [IEEE80211_MODE_TURBO_G]= { 2, 3, 5, 0, 0 },
1006 [IEEE80211_MODE_STURBO_A]={ 2, 3, 5, 0, 0 },
1007 [IEEE80211_MODE_HALF] = { 3, 4, 6, 0, 0 },
1008 [IEEE80211_MODE_QUARTER]= { 3, 4, 6, 0, 0 },
1009 [IEEE80211_MODE_11NA] = { 3, 4, 6, 0, 0 },
1010 [IEEE80211_MODE_11NG] = { 3, 4, 6, 0, 0 },
1011 [IEEE80211_MODE_VHT_2GHZ] = { 3, 4, 6, 0, 0 },
1012 [IEEE80211_MODE_VHT_5GHZ] = { 3, 4, 6, 0, 0 },
1014 static const struct phyParamType phyParamForAC_BK[IEEE80211_MODE_MAX] = {
1015 [IEEE80211_MODE_AUTO] = { 7, 4, 10, 0, 0 },
1016 [IEEE80211_MODE_11A] = { 7, 4, 10, 0, 0 },
1017 [IEEE80211_MODE_11B] = { 7, 4, 10, 0, 0 },
1018 [IEEE80211_MODE_11G] = { 7, 4, 10, 0, 0 },
1019 [IEEE80211_MODE_FH] = { 7, 4, 10, 0, 0 },
1020 [IEEE80211_MODE_TURBO_A]= { 7, 3, 10, 0, 0 },
1021 [IEEE80211_MODE_TURBO_G]= { 7, 3, 10, 0, 0 },
1022 [IEEE80211_MODE_STURBO_A]={ 7, 3, 10, 0, 0 },
1023 [IEEE80211_MODE_HALF] = { 7, 4, 10, 0, 0 },
1024 [IEEE80211_MODE_QUARTER]= { 7, 4, 10, 0, 0 },
1025 [IEEE80211_MODE_11NA] = { 7, 4, 10, 0, 0 },
1026 [IEEE80211_MODE_11NG] = { 7, 4, 10, 0, 0 },
1027 [IEEE80211_MODE_VHT_2GHZ] = { 7, 4, 10, 0, 0 },
1028 [IEEE80211_MODE_VHT_5GHZ] = { 7, 4, 10, 0, 0 },
1030 static const struct phyParamType phyParamForAC_VI[IEEE80211_MODE_MAX] = {
1031 [IEEE80211_MODE_AUTO] = { 1, 3, 4, 94, 0 },
1032 [IEEE80211_MODE_11A] = { 1, 3, 4, 94, 0 },
1033 [IEEE80211_MODE_11B] = { 1, 3, 4, 188, 0 },
1034 [IEEE80211_MODE_11G] = { 1, 3, 4, 94, 0 },
1035 [IEEE80211_MODE_FH] = { 1, 3, 4, 188, 0 },
1036 [IEEE80211_MODE_TURBO_A]= { 1, 2, 3, 94, 0 },
1037 [IEEE80211_MODE_TURBO_G]= { 1, 2, 3, 94, 0 },
1038 [IEEE80211_MODE_STURBO_A]={ 1, 2, 3, 94, 0 },
1039 [IEEE80211_MODE_HALF] = { 1, 3, 4, 94, 0 },
1040 [IEEE80211_MODE_QUARTER]= { 1, 3, 4, 94, 0 },
1041 [IEEE80211_MODE_11NA] = { 1, 3, 4, 94, 0 },
1042 [IEEE80211_MODE_11NG] = { 1, 3, 4, 94, 0 },
1043 [IEEE80211_MODE_VHT_2GHZ] = { 1, 3, 4, 94, 0 },
1044 [IEEE80211_MODE_VHT_5GHZ] = { 1, 3, 4, 94, 0 },
1046 static const struct phyParamType phyParamForAC_VO[IEEE80211_MODE_MAX] = {
1047 [IEEE80211_MODE_AUTO] = { 1, 2, 3, 47, 0 },
1048 [IEEE80211_MODE_11A] = { 1, 2, 3, 47, 0 },
1049 [IEEE80211_MODE_11B] = { 1, 2, 3, 102, 0 },
1050 [IEEE80211_MODE_11G] = { 1, 2, 3, 47, 0 },
1051 [IEEE80211_MODE_FH] = { 1, 2, 3, 102, 0 },
1052 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 },
1053 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 },
1054 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 },
1055 [IEEE80211_MODE_HALF] = { 1, 2, 3, 47, 0 },
1056 [IEEE80211_MODE_QUARTER]= { 1, 2, 3, 47, 0 },
1057 [IEEE80211_MODE_11NA] = { 1, 2, 3, 47, 0 },
1058 [IEEE80211_MODE_11NG] = { 1, 2, 3, 47, 0 },
1059 [IEEE80211_MODE_VHT_2GHZ] = { 1, 2, 3, 47, 0 },
1060 [IEEE80211_MODE_VHT_5GHZ] = { 1, 2, 3, 47, 0 },
1063 static const struct phyParamType bssPhyParamForAC_BE[IEEE80211_MODE_MAX] = {
1064 [IEEE80211_MODE_AUTO] = { 3, 4, 10, 0, 0 },
1065 [IEEE80211_MODE_11A] = { 3, 4, 10, 0, 0 },
1066 [IEEE80211_MODE_11B] = { 3, 4, 10, 0, 0 },
1067 [IEEE80211_MODE_11G] = { 3, 4, 10, 0, 0 },
1068 [IEEE80211_MODE_FH] = { 3, 4, 10, 0, 0 },
1069 [IEEE80211_MODE_TURBO_A]= { 2, 3, 10, 0, 0 },
1070 [IEEE80211_MODE_TURBO_G]= { 2, 3, 10, 0, 0 },
1071 [IEEE80211_MODE_STURBO_A]={ 2, 3, 10, 0, 0 },
1072 [IEEE80211_MODE_HALF] = { 3, 4, 10, 0, 0 },
1073 [IEEE80211_MODE_QUARTER]= { 3, 4, 10, 0, 0 },
1074 [IEEE80211_MODE_11NA] = { 3, 4, 10, 0, 0 },
1075 [IEEE80211_MODE_11NG] = { 3, 4, 10, 0, 0 },
1077 static const struct phyParamType bssPhyParamForAC_VI[IEEE80211_MODE_MAX] = {
1078 [IEEE80211_MODE_AUTO] = { 2, 3, 4, 94, 0 },
1079 [IEEE80211_MODE_11A] = { 2, 3, 4, 94, 0 },
1080 [IEEE80211_MODE_11B] = { 2, 3, 4, 188, 0 },
1081 [IEEE80211_MODE_11G] = { 2, 3, 4, 94, 0 },
1082 [IEEE80211_MODE_FH] = { 2, 3, 4, 188, 0 },
1083 [IEEE80211_MODE_TURBO_A]= { 2, 2, 3, 94, 0 },
1084 [IEEE80211_MODE_TURBO_G]= { 2, 2, 3, 94, 0 },
1085 [IEEE80211_MODE_STURBO_A]={ 2, 2, 3, 94, 0 },
1086 [IEEE80211_MODE_HALF] = { 2, 3, 4, 94, 0 },
1087 [IEEE80211_MODE_QUARTER]= { 2, 3, 4, 94, 0 },
1088 [IEEE80211_MODE_11NA] = { 2, 3, 4, 94, 0 },
1089 [IEEE80211_MODE_11NG] = { 2, 3, 4, 94, 0 },
1091 static const struct phyParamType bssPhyParamForAC_VO[IEEE80211_MODE_MAX] = {
1092 [IEEE80211_MODE_AUTO] = { 2, 2, 3, 47, 0 },
1093 [IEEE80211_MODE_11A] = { 2, 2, 3, 47, 0 },
1094 [IEEE80211_MODE_11B] = { 2, 2, 3, 102, 0 },
1095 [IEEE80211_MODE_11G] = { 2, 2, 3, 47, 0 },
1096 [IEEE80211_MODE_FH] = { 2, 2, 3, 102, 0 },
1097 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 },
1098 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 },
1099 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 },
1100 [IEEE80211_MODE_HALF] = { 2, 2, 3, 47, 0 },
1101 [IEEE80211_MODE_QUARTER]= { 2, 2, 3, 47, 0 },
1102 [IEEE80211_MODE_11NA] = { 2, 2, 3, 47, 0 },
1103 [IEEE80211_MODE_11NG] = { 2, 2, 3, 47, 0 },
1107 _setifsparams(struct wmeParams *wmep, const paramType *phy)
1109 wmep->wmep_aifsn = phy->aifsn;
1110 wmep->wmep_logcwmin = phy->logcwmin;
1111 wmep->wmep_logcwmax = phy->logcwmax;
1112 wmep->wmep_txopLimit = phy->txopLimit;
1116 setwmeparams(struct ieee80211vap *vap, const char *type, int ac,
1117 struct wmeParams *wmep, const paramType *phy)
1119 wmep->wmep_acm = phy->acm;
1120 _setifsparams(wmep, phy);
1122 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1123 "set %s (%s) [acm %u aifsn %u logcwmin %u logcwmax %u txop %u]\n",
1124 ieee80211_wme_acnames[ac], type,
1125 wmep->wmep_acm, wmep->wmep_aifsn, wmep->wmep_logcwmin,
1126 wmep->wmep_logcwmax, wmep->wmep_txopLimit);
1130 ieee80211_wme_initparams_locked(struct ieee80211vap *vap)
1132 struct ieee80211com *ic = vap->iv_ic;
1133 struct ieee80211_wme_state *wme = &ic->ic_wme;
1134 const paramType *pPhyParam, *pBssPhyParam;
1135 struct wmeParams *wmep;
1136 enum ieee80211_phymode mode;
1139 IEEE80211_LOCK_ASSERT(ic);
1141 if ((ic->ic_caps & IEEE80211_C_WME) == 0 || ic->ic_nrunning > 1)
1145 * Clear the wme cap_info field so a qoscount from a previous
1146 * vap doesn't confuse later code which only parses the beacon
1147 * field and updates hardware when said field changes.
1148 * Otherwise the hardware is programmed with defaults, not what
1149 * the beacon actually announces.
1151 * Note that we can't ever have 0xff as an actual value;
1152 * the only valid values are 0..15.
1154 wme->wme_wmeChanParams.cap_info = 0xfe;
1157 * Select mode; we can be called early in which case we
1158 * always use auto mode. We know we'll be called when
1159 * entering the RUN state with bsschan setup properly
1160 * so state will eventually get set correctly
1162 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC)
1163 mode = ieee80211_chan2mode(ic->ic_bsschan);
1165 mode = IEEE80211_MODE_AUTO;
1166 for (i = 0; i < WME_NUM_AC; i++) {
1169 pPhyParam = &phyParamForAC_BK[mode];
1170 pBssPhyParam = &phyParamForAC_BK[mode];
1173 pPhyParam = &phyParamForAC_VI[mode];
1174 pBssPhyParam = &bssPhyParamForAC_VI[mode];
1177 pPhyParam = &phyParamForAC_VO[mode];
1178 pBssPhyParam = &bssPhyParamForAC_VO[mode];
1182 pPhyParam = &phyParamForAC_BE[mode];
1183 pBssPhyParam = &bssPhyParamForAC_BE[mode];
1186 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i];
1187 if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
1188 setwmeparams(vap, "chan", i, wmep, pPhyParam);
1190 setwmeparams(vap, "chan", i, wmep, pBssPhyParam);
1192 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i];
1193 setwmeparams(vap, "bss ", i, wmep, pBssPhyParam);
1195 /* NB: check ic_bss to avoid NULL deref on initial attach */
1196 if (vap->iv_bss != NULL) {
1198 * Calculate aggressive mode switching threshold based
1199 * on beacon interval. This doesn't need locking since
1200 * we're only called before entering the RUN state at
1201 * which point we start sending beacon frames.
1203 wme->wme_hipri_switch_thresh =
1204 (HIGH_PRI_SWITCH_THRESH * vap->iv_bss->ni_intval) / 100;
1205 wme->wme_flags &= ~WME_F_AGGRMODE;
1206 ieee80211_wme_updateparams(vap);
1211 ieee80211_wme_initparams(struct ieee80211vap *vap)
1213 struct ieee80211com *ic = vap->iv_ic;
1216 ieee80211_wme_initparams_locked(vap);
1217 IEEE80211_UNLOCK(ic);
1221 * Update WME parameters for ourself and the BSS.
1224 ieee80211_wme_updateparams_locked(struct ieee80211vap *vap)
1226 static const paramType aggrParam[IEEE80211_MODE_MAX] = {
1227 [IEEE80211_MODE_AUTO] = { 2, 4, 10, 64, 0 },
1228 [IEEE80211_MODE_11A] = { 2, 4, 10, 64, 0 },
1229 [IEEE80211_MODE_11B] = { 2, 5, 10, 64, 0 },
1230 [IEEE80211_MODE_11G] = { 2, 4, 10, 64, 0 },
1231 [IEEE80211_MODE_FH] = { 2, 5, 10, 64, 0 },
1232 [IEEE80211_MODE_TURBO_A] = { 1, 3, 10, 64, 0 },
1233 [IEEE80211_MODE_TURBO_G] = { 1, 3, 10, 64, 0 },
1234 [IEEE80211_MODE_STURBO_A] = { 1, 3, 10, 64, 0 },
1235 [IEEE80211_MODE_HALF] = { 2, 4, 10, 64, 0 },
1236 [IEEE80211_MODE_QUARTER] = { 2, 4, 10, 64, 0 },
1237 [IEEE80211_MODE_11NA] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/
1238 [IEEE80211_MODE_11NG] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/
1239 [IEEE80211_MODE_VHT_2GHZ] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/
1240 [IEEE80211_MODE_VHT_5GHZ] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/
1242 struct ieee80211com *ic = vap->iv_ic;
1243 struct ieee80211_wme_state *wme = &ic->ic_wme;
1244 const struct wmeParams *wmep;
1245 struct wmeParams *chanp, *bssp;
1246 enum ieee80211_phymode mode;
1248 int do_aggrmode = 0;
1251 * Set up the channel access parameters for the physical
1252 * device. First populate the configured settings.
1254 for (i = 0; i < WME_NUM_AC; i++) {
1255 chanp = &wme->wme_chanParams.cap_wmeParams[i];
1256 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i];
1257 chanp->wmep_aifsn = wmep->wmep_aifsn;
1258 chanp->wmep_logcwmin = wmep->wmep_logcwmin;
1259 chanp->wmep_logcwmax = wmep->wmep_logcwmax;
1260 chanp->wmep_txopLimit = wmep->wmep_txopLimit;
1262 chanp = &wme->wme_bssChanParams.cap_wmeParams[i];
1263 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i];
1264 chanp->wmep_aifsn = wmep->wmep_aifsn;
1265 chanp->wmep_logcwmin = wmep->wmep_logcwmin;
1266 chanp->wmep_logcwmax = wmep->wmep_logcwmax;
1267 chanp->wmep_txopLimit = wmep->wmep_txopLimit;
1271 * Select mode; we can be called early in which case we
1272 * always use auto mode. We know we'll be called when
1273 * entering the RUN state with bsschan setup properly
1274 * so state will eventually get set correctly
1276 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC)
1277 mode = ieee80211_chan2mode(ic->ic_bsschan);
1279 mode = IEEE80211_MODE_AUTO;
1282 * This implements aggressive mode as found in certain
1283 * vendors' AP's. When there is significant high
1284 * priority (VI/VO) traffic in the BSS throttle back BE
1285 * traffic by using conservative parameters. Otherwise
1286 * BE uses aggressive params to optimize performance of
1287 * legacy/non-QoS traffic.
1290 /* Hostap? Only if aggressive mode is enabled */
1291 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
1292 (wme->wme_flags & WME_F_AGGRMODE) != 0)
1296 * Station? Only if we're in a non-QoS BSS.
1298 else if ((vap->iv_opmode == IEEE80211_M_STA &&
1299 (vap->iv_bss->ni_flags & IEEE80211_NODE_QOS) == 0))
1303 * IBSS? Only if we we have WME enabled.
1305 else if ((vap->iv_opmode == IEEE80211_M_IBSS) &&
1306 (vap->iv_flags & IEEE80211_F_WME))
1310 * If WME is disabled on this VAP, default to aggressive mode
1311 * regardless of the configuration.
1313 if ((vap->iv_flags & IEEE80211_F_WME) == 0)
1321 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE];
1322 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE];
1324 chanp->wmep_aifsn = bssp->wmep_aifsn = aggrParam[mode].aifsn;
1325 chanp->wmep_logcwmin = bssp->wmep_logcwmin =
1326 aggrParam[mode].logcwmin;
1327 chanp->wmep_logcwmax = bssp->wmep_logcwmax =
1328 aggrParam[mode].logcwmax;
1329 chanp->wmep_txopLimit = bssp->wmep_txopLimit =
1330 (vap->iv_flags & IEEE80211_F_BURST) ?
1331 aggrParam[mode].txopLimit : 0;
1332 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1333 "update %s (chan+bss) [acm %u aifsn %u logcwmin %u "
1334 "logcwmax %u txop %u]\n", ieee80211_wme_acnames[WME_AC_BE],
1335 chanp->wmep_acm, chanp->wmep_aifsn, chanp->wmep_logcwmin,
1336 chanp->wmep_logcwmax, chanp->wmep_txopLimit);
1341 * Change the contention window based on the number of associated
1342 * stations. If the number of associated stations is 1 and
1343 * aggressive mode is enabled, lower the contention window even
1346 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
1347 ic->ic_sta_assoc < 2 && (wme->wme_flags & WME_F_AGGRMODE) != 0) {
1348 static const uint8_t logCwMin[IEEE80211_MODE_MAX] = {
1349 [IEEE80211_MODE_AUTO] = 3,
1350 [IEEE80211_MODE_11A] = 3,
1351 [IEEE80211_MODE_11B] = 4,
1352 [IEEE80211_MODE_11G] = 3,
1353 [IEEE80211_MODE_FH] = 4,
1354 [IEEE80211_MODE_TURBO_A] = 3,
1355 [IEEE80211_MODE_TURBO_G] = 3,
1356 [IEEE80211_MODE_STURBO_A] = 3,
1357 [IEEE80211_MODE_HALF] = 3,
1358 [IEEE80211_MODE_QUARTER] = 3,
1359 [IEEE80211_MODE_11NA] = 3,
1360 [IEEE80211_MODE_11NG] = 3,
1361 [IEEE80211_MODE_VHT_2GHZ] = 3,
1362 [IEEE80211_MODE_VHT_5GHZ] = 3,
1364 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE];
1365 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE];
1367 chanp->wmep_logcwmin = bssp->wmep_logcwmin = logCwMin[mode];
1368 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1369 "update %s (chan+bss) logcwmin %u\n",
1370 ieee80211_wme_acnames[WME_AC_BE], chanp->wmep_logcwmin);
1374 * Arrange for the beacon update.
1376 * XXX what about MBSS, WDS?
1378 if (vap->iv_opmode == IEEE80211_M_HOSTAP
1379 || vap->iv_opmode == IEEE80211_M_IBSS) {
1381 * Arrange for a beacon update and bump the parameter
1382 * set number so associated stations load the new values.
1384 wme->wme_bssChanParams.cap_info =
1385 (wme->wme_bssChanParams.cap_info+1) & WME_QOSINFO_COUNT;
1386 ieee80211_beacon_notify(vap, IEEE80211_BEACON_WME);
1389 /* schedule the deferred WME update */
1390 ieee80211_runtask(ic, &vap->iv_wme_task);
1392 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1393 "%s: WME params updated, cap_info 0x%x\n", __func__,
1394 vap->iv_opmode == IEEE80211_M_STA ?
1395 wme->wme_wmeChanParams.cap_info :
1396 wme->wme_bssChanParams.cap_info);
1400 ieee80211_wme_updateparams(struct ieee80211vap *vap)
1402 struct ieee80211com *ic = vap->iv_ic;
1404 if (ic->ic_caps & IEEE80211_C_WME) {
1406 ieee80211_wme_updateparams_locked(vap);
1407 IEEE80211_UNLOCK(ic);
1412 * Fetch the WME parameters for the given VAP.
1414 * When net80211 grows p2p, etc support, this may return different
1415 * parameters for each VAP.
1418 ieee80211_wme_vap_getparams(struct ieee80211vap *vap, struct chanAccParams *wp)
1421 memcpy(wp, &vap->iv_ic->ic_wme.wme_chanParams, sizeof(*wp));
1425 * For NICs which only support one set of WME paramaters (ie, softmac NICs)
1426 * there may be different VAP WME parameters but only one is "active".
1427 * This returns the "NIC" WME parameters for the currently active
1431 ieee80211_wme_ic_getparams(struct ieee80211com *ic, struct chanAccParams *wp)
1434 memcpy(wp, &ic->ic_wme.wme_chanParams, sizeof(*wp));
1438 * Return whether to use QoS on a given WME queue.
1440 * This is intended to be called from the transmit path of softmac drivers
1441 * which are setting NoAck bits in transmit descriptors.
1443 * Ideally this would be set in some transmit field before the packet is
1444 * queued to the driver but net80211 isn't quite there yet.
1447 ieee80211_wme_vap_ac_is_noack(struct ieee80211vap *vap, int ac)
1449 /* Bounds/sanity check */
1450 if (ac < 0 || ac >= WME_NUM_AC)
1453 /* Again, there's only one global context for now */
1454 return (!! vap->iv_ic->ic_wme.wme_chanParams.cap_wmeParams[ac].wmep_noackPolicy);
1458 parent_updown(void *arg, int npending)
1460 struct ieee80211com *ic = arg;
1466 update_mcast(void *arg, int npending)
1468 struct ieee80211com *ic = arg;
1470 ic->ic_update_mcast(ic);
1474 update_promisc(void *arg, int npending)
1476 struct ieee80211com *ic = arg;
1478 ic->ic_update_promisc(ic);
1482 update_channel(void *arg, int npending)
1484 struct ieee80211com *ic = arg;
1486 ic->ic_set_channel(ic);
1487 ieee80211_radiotap_chan_change(ic);
1491 update_chw(void *arg, int npending)
1493 struct ieee80211com *ic = arg;
1496 * XXX should we defer the channel width _config_ update until now?
1498 ic->ic_update_chw(ic);
1502 * Deferred WME update.
1504 * In preparation for per-VAP WME configuration, call the VAP
1505 * method if the VAP requires it. Otherwise, just call the
1506 * older global method. There isn't a per-VAP WME configuration
1507 * just yet so for now just use the global configuration.
1510 vap_update_wme(void *arg, int npending)
1512 struct ieee80211vap *vap = arg;
1513 struct ieee80211com *ic = vap->iv_ic;
1515 if (vap->iv_wme_update != NULL)
1516 vap->iv_wme_update(vap,
1517 ic->ic_wme.wme_chanParams.cap_wmeParams);
1519 ic->ic_wme.wme_update(ic);
1523 restart_vaps(void *arg, int npending)
1525 struct ieee80211com *ic = arg;
1527 ieee80211_suspend_all(ic);
1528 ieee80211_resume_all(ic);
1532 * Block until the parent is in a known state. This is
1533 * used after any operations that dispatch a task (e.g.
1534 * to auto-configure the parent device up/down).
1537 ieee80211_waitfor_parent(struct ieee80211com *ic)
1539 taskqueue_block(ic->ic_tq);
1540 ieee80211_draintask(ic, &ic->ic_parent_task);
1541 ieee80211_draintask(ic, &ic->ic_mcast_task);
1542 ieee80211_draintask(ic, &ic->ic_promisc_task);
1543 ieee80211_draintask(ic, &ic->ic_chan_task);
1544 ieee80211_draintask(ic, &ic->ic_bmiss_task);
1545 ieee80211_draintask(ic, &ic->ic_chw_task);
1546 taskqueue_unblock(ic->ic_tq);
1550 * Check to see whether the current channel needs reset.
1552 * Some devices don't handle being given an invalid channel
1553 * in their operating mode very well (eg wpi(4) will throw a
1554 * firmware exception.)
1556 * Return 0 if we're ok, 1 if the channel needs to be reset.
1558 * See PR kern/202502.
1561 ieee80211_start_check_reset_chan(struct ieee80211vap *vap)
1563 struct ieee80211com *ic = vap->iv_ic;
1565 if ((vap->iv_opmode == IEEE80211_M_IBSS &&
1566 IEEE80211_IS_CHAN_NOADHOC(ic->ic_curchan)) ||
1567 (vap->iv_opmode == IEEE80211_M_HOSTAP &&
1568 IEEE80211_IS_CHAN_NOHOSTAP(ic->ic_curchan)))
1574 * Reset the curchan to a known good state.
1577 ieee80211_start_reset_chan(struct ieee80211vap *vap)
1579 struct ieee80211com *ic = vap->iv_ic;
1581 ic->ic_curchan = &ic->ic_channels[0];
1585 * Start a vap running. If this is the first vap to be
1586 * set running on the underlying device then we
1587 * automatically bring the device up.
1590 ieee80211_start_locked(struct ieee80211vap *vap)
1592 struct ifnet *ifp = vap->iv_ifp;
1593 struct ieee80211com *ic = vap->iv_ic;
1595 IEEE80211_LOCK_ASSERT(ic);
1597 IEEE80211_DPRINTF(vap,
1598 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1599 "start running, %d vaps running\n", ic->ic_nrunning);
1601 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
1603 * Mark us running. Note that it's ok to do this first;
1604 * if we need to bring the parent device up we defer that
1605 * to avoid dropping the com lock. We expect the device
1606 * to respond to being marked up by calling back into us
1607 * through ieee80211_start_all at which point we'll come
1608 * back in here and complete the work.
1610 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1611 ieee80211_notify_ifnet_change(vap);
1614 * We are not running; if this we are the first vap
1615 * to be brought up auto-up the parent if necessary.
1617 if (ic->ic_nrunning++ == 0) {
1619 /* reset the channel to a known good channel */
1620 if (ieee80211_start_check_reset_chan(vap))
1621 ieee80211_start_reset_chan(vap);
1623 IEEE80211_DPRINTF(vap,
1624 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1625 "%s: up parent %s\n", __func__, ic->ic_name);
1626 ieee80211_runtask(ic, &ic->ic_parent_task);
1631 * If the parent is up and running, then kick the
1632 * 802.11 state machine as appropriate.
1634 if (vap->iv_roaming != IEEE80211_ROAMING_MANUAL) {
1635 if (vap->iv_opmode == IEEE80211_M_STA) {
1637 /* XXX bypasses scan too easily; disable for now */
1639 * Try to be intelligent about clocking the state
1640 * machine. If we're currently in RUN state then
1641 * we should be able to apply any new state/parameters
1642 * simply by re-associating. Otherwise we need to
1643 * re-scan to select an appropriate ap.
1645 if (vap->iv_state >= IEEE80211_S_RUN)
1646 ieee80211_new_state_locked(vap,
1647 IEEE80211_S_ASSOC, 1);
1650 ieee80211_new_state_locked(vap,
1651 IEEE80211_S_SCAN, 0);
1654 * For monitor+wds mode there's nothing to do but
1655 * start running. Otherwise if this is the first
1656 * vap to be brought up, start a scan which may be
1657 * preempted if the station is locked to a particular
1660 vap->iv_flags_ext |= IEEE80211_FEXT_REINIT;
1661 if (vap->iv_opmode == IEEE80211_M_MONITOR ||
1662 vap->iv_opmode == IEEE80211_M_WDS)
1663 ieee80211_new_state_locked(vap,
1664 IEEE80211_S_RUN, -1);
1666 ieee80211_new_state_locked(vap,
1667 IEEE80211_S_SCAN, 0);
1673 * Start a single vap.
1676 ieee80211_init(void *arg)
1678 struct ieee80211vap *vap = arg;
1680 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1683 IEEE80211_LOCK(vap->iv_ic);
1684 ieee80211_start_locked(vap);
1685 IEEE80211_UNLOCK(vap->iv_ic);
1689 * Start all runnable vap's on a device.
1692 ieee80211_start_all(struct ieee80211com *ic)
1694 struct ieee80211vap *vap;
1697 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1698 struct ifnet *ifp = vap->iv_ifp;
1699 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */
1700 ieee80211_start_locked(vap);
1702 IEEE80211_UNLOCK(ic);
1706 * Stop a vap. We force it down using the state machine
1707 * then mark it's ifnet not running. If this is the last
1708 * vap running on the underlying device then we close it
1709 * too to insure it will be properly initialized when the
1710 * next vap is brought up.
1713 ieee80211_stop_locked(struct ieee80211vap *vap)
1715 struct ieee80211com *ic = vap->iv_ic;
1716 struct ifnet *ifp = vap->iv_ifp;
1718 IEEE80211_LOCK_ASSERT(ic);
1720 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1721 "stop running, %d vaps running\n", ic->ic_nrunning);
1723 ieee80211_new_state_locked(vap, IEEE80211_S_INIT, -1);
1724 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
1725 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; /* mark us stopped */
1726 ieee80211_notify_ifnet_change(vap);
1727 if (--ic->ic_nrunning == 0) {
1728 IEEE80211_DPRINTF(vap,
1729 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1730 "down parent %s\n", ic->ic_name);
1731 ieee80211_runtask(ic, &ic->ic_parent_task);
1737 ieee80211_stop(struct ieee80211vap *vap)
1739 struct ieee80211com *ic = vap->iv_ic;
1742 ieee80211_stop_locked(vap);
1743 IEEE80211_UNLOCK(ic);
1747 * Stop all vap's running on a device.
1750 ieee80211_stop_all(struct ieee80211com *ic)
1752 struct ieee80211vap *vap;
1755 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1756 struct ifnet *ifp = vap->iv_ifp;
1757 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */
1758 ieee80211_stop_locked(vap);
1760 IEEE80211_UNLOCK(ic);
1762 ieee80211_waitfor_parent(ic);
1766 * Stop all vap's running on a device and arrange
1767 * for those that were running to be resumed.
1770 ieee80211_suspend_all(struct ieee80211com *ic)
1772 struct ieee80211vap *vap;
1775 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1776 struct ifnet *ifp = vap->iv_ifp;
1777 if (IFNET_IS_UP_RUNNING(ifp)) { /* NB: avoid recursion */
1778 vap->iv_flags_ext |= IEEE80211_FEXT_RESUME;
1779 ieee80211_stop_locked(vap);
1782 IEEE80211_UNLOCK(ic);
1784 ieee80211_waitfor_parent(ic);
1788 * Start all vap's marked for resume.
1791 ieee80211_resume_all(struct ieee80211com *ic)
1793 struct ieee80211vap *vap;
1796 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1797 struct ifnet *ifp = vap->iv_ifp;
1798 if (!IFNET_IS_UP_RUNNING(ifp) &&
1799 (vap->iv_flags_ext & IEEE80211_FEXT_RESUME)) {
1800 vap->iv_flags_ext &= ~IEEE80211_FEXT_RESUME;
1801 ieee80211_start_locked(vap);
1804 IEEE80211_UNLOCK(ic);
1808 * Restart all vap's running on a device.
1811 ieee80211_restart_all(struct ieee80211com *ic)
1814 * NB: do not use ieee80211_runtask here, we will
1815 * block & drain net80211 taskqueue.
1817 taskqueue_enqueue(taskqueue_thread, &ic->ic_restart_task);
1821 ieee80211_beacon_miss(struct ieee80211com *ic)
1824 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1825 /* Process in a taskq, the handler may reenter the driver */
1826 ieee80211_runtask(ic, &ic->ic_bmiss_task);
1828 IEEE80211_UNLOCK(ic);
1832 beacon_miss(void *arg, int npending)
1834 struct ieee80211com *ic = arg;
1835 struct ieee80211vap *vap;
1838 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1840 * We only pass events through for sta vap's in RUN+ state;
1841 * may be too restrictive but for now this saves all the
1842 * handlers duplicating these checks.
1844 if (vap->iv_opmode == IEEE80211_M_STA &&
1845 vap->iv_state >= IEEE80211_S_RUN &&
1846 vap->iv_bmiss != NULL)
1849 IEEE80211_UNLOCK(ic);
1853 beacon_swmiss(void *arg, int npending)
1855 struct ieee80211vap *vap = arg;
1856 struct ieee80211com *ic = vap->iv_ic;
1859 if (vap->iv_state >= IEEE80211_S_RUN) {
1860 /* XXX Call multiple times if npending > zero? */
1863 IEEE80211_UNLOCK(ic);
1867 * Software beacon miss handling. Check if any beacons
1868 * were received in the last period. If not post a
1869 * beacon miss; otherwise reset the counter.
1872 ieee80211_swbmiss(void *arg)
1874 struct ieee80211vap *vap = arg;
1875 struct ieee80211com *ic = vap->iv_ic;
1877 IEEE80211_LOCK_ASSERT(ic);
1879 KASSERT(vap->iv_state >= IEEE80211_S_RUN,
1880 ("wrong state %d", vap->iv_state));
1882 if (ic->ic_flags & IEEE80211_F_SCAN) {
1884 * If scanning just ignore and reset state. If we get a
1885 * bmiss after coming out of scan because we haven't had
1886 * time to receive a beacon then we should probe the AP
1887 * before posting a real bmiss (unless iv_bmiss_max has
1888 * been artifiically lowered). A cleaner solution might
1889 * be to disable the timer on scan start/end but to handle
1890 * case of multiple sta vap's we'd need to disable the
1891 * timers of all affected vap's.
1893 vap->iv_swbmiss_count = 0;
1894 } else if (vap->iv_swbmiss_count == 0) {
1895 if (vap->iv_bmiss != NULL)
1896 ieee80211_runtask(ic, &vap->iv_swbmiss_task);
1898 vap->iv_swbmiss_count = 0;
1899 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period,
1900 ieee80211_swbmiss, vap);
1904 * Start an 802.11h channel switch. We record the parameters,
1905 * mark the operation pending, notify each vap through the
1906 * beacon update mechanism so it can update the beacon frame
1907 * contents, and then switch vap's to CSA state to block outbound
1908 * traffic. Devices that handle CSA directly can use the state
1909 * switch to do the right thing so long as they call
1910 * ieee80211_csa_completeswitch when it's time to complete the
1911 * channel change. Devices that depend on the net80211 layer can
1912 * use ieee80211_beacon_update to handle the countdown and the
1916 ieee80211_csa_startswitch(struct ieee80211com *ic,
1917 struct ieee80211_channel *c, int mode, int count)
1919 struct ieee80211vap *vap;
1921 IEEE80211_LOCK_ASSERT(ic);
1923 ic->ic_csa_newchan = c;
1924 ic->ic_csa_mode = mode;
1925 ic->ic_csa_count = count;
1926 ic->ic_flags |= IEEE80211_F_CSAPENDING;
1927 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1928 if (vap->iv_opmode == IEEE80211_M_HOSTAP ||
1929 vap->iv_opmode == IEEE80211_M_IBSS ||
1930 vap->iv_opmode == IEEE80211_M_MBSS)
1931 ieee80211_beacon_notify(vap, IEEE80211_BEACON_CSA);
1932 /* switch to CSA state to block outbound traffic */
1933 if (vap->iv_state == IEEE80211_S_RUN)
1934 ieee80211_new_state_locked(vap, IEEE80211_S_CSA, 0);
1936 ieee80211_notify_csa(ic, c, mode, count);
1940 * Complete the channel switch by transitioning all CSA VAPs to RUN.
1941 * This is called by both the completion and cancellation functions
1942 * so each VAP is placed back in the RUN state and can thus transmit.
1945 csa_completeswitch(struct ieee80211com *ic)
1947 struct ieee80211vap *vap;
1949 ic->ic_csa_newchan = NULL;
1950 ic->ic_flags &= ~IEEE80211_F_CSAPENDING;
1952 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1953 if (vap->iv_state == IEEE80211_S_CSA)
1954 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0);
1958 * Complete an 802.11h channel switch started by ieee80211_csa_startswitch.
1959 * We clear state and move all vap's in CSA state to RUN state
1960 * so they can again transmit.
1962 * Although this may not be completely correct, update the BSS channel
1963 * for each VAP to the newly configured channel. The setcurchan sets
1964 * the current operating channel for the interface (so the radio does
1965 * switch over) but the VAP BSS isn't updated, leading to incorrectly
1966 * reported information via ioctl.
1969 ieee80211_csa_completeswitch(struct ieee80211com *ic)
1971 struct ieee80211vap *vap;
1973 IEEE80211_LOCK_ASSERT(ic);
1975 KASSERT(ic->ic_flags & IEEE80211_F_CSAPENDING, ("csa not pending"));
1977 ieee80211_setcurchan(ic, ic->ic_csa_newchan);
1978 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1979 if (vap->iv_state == IEEE80211_S_CSA)
1980 vap->iv_bss->ni_chan = ic->ic_curchan;
1982 csa_completeswitch(ic);
1986 * Cancel an 802.11h channel switch started by ieee80211_csa_startswitch.
1987 * We clear state and move all vap's in CSA state to RUN state
1988 * so they can again transmit.
1991 ieee80211_csa_cancelswitch(struct ieee80211com *ic)
1993 IEEE80211_LOCK_ASSERT(ic);
1995 csa_completeswitch(ic);
1999 * Complete a DFS CAC started by ieee80211_dfs_cac_start.
2000 * We clear state and move all vap's in CAC state to RUN state.
2003 ieee80211_cac_completeswitch(struct ieee80211vap *vap0)
2005 struct ieee80211com *ic = vap0->iv_ic;
2006 struct ieee80211vap *vap;
2010 * Complete CAC state change for lead vap first; then
2011 * clock all the other vap's waiting.
2013 KASSERT(vap0->iv_state == IEEE80211_S_CAC,
2014 ("wrong state %d", vap0->iv_state));
2015 ieee80211_new_state_locked(vap0, IEEE80211_S_RUN, 0);
2017 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
2018 if (vap->iv_state == IEEE80211_S_CAC && vap != vap0)
2019 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0);
2020 IEEE80211_UNLOCK(ic);
2024 * Force all vap's other than the specified vap to the INIT state
2025 * and mark them as waiting for a scan to complete. These vaps
2026 * will be brought up when the scan completes and the scanning vap
2027 * reaches RUN state by wakeupwaiting.
2030 markwaiting(struct ieee80211vap *vap0)
2032 struct ieee80211com *ic = vap0->iv_ic;
2033 struct ieee80211vap *vap;
2035 IEEE80211_LOCK_ASSERT(ic);
2038 * A vap list entry can not disappear since we are running on the
2039 * taskqueue and a vap destroy will queue and drain another state
2042 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
2045 if (vap->iv_state != IEEE80211_S_INIT) {
2046 /* NB: iv_newstate may drop the lock */
2047 vap->iv_newstate(vap, IEEE80211_S_INIT, 0);
2048 IEEE80211_LOCK_ASSERT(ic);
2049 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT;
2055 * Wakeup all vap's waiting for a scan to complete. This is the
2056 * companion to markwaiting (above) and is used to coordinate
2057 * multiple vaps scanning.
2058 * This is called from the state taskqueue.
2061 wakeupwaiting(struct ieee80211vap *vap0)
2063 struct ieee80211com *ic = vap0->iv_ic;
2064 struct ieee80211vap *vap;
2066 IEEE80211_LOCK_ASSERT(ic);
2069 * A vap list entry can not disappear since we are running on the
2070 * taskqueue and a vap destroy will queue and drain another state
2073 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
2076 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANWAIT) {
2077 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT;
2078 /* NB: sta's cannot go INIT->RUN */
2079 /* NB: iv_newstate may drop the lock */
2080 vap->iv_newstate(vap,
2081 vap->iv_opmode == IEEE80211_M_STA ?
2082 IEEE80211_S_SCAN : IEEE80211_S_RUN, 0);
2083 IEEE80211_LOCK_ASSERT(ic);
2089 * Handle post state change work common to all operating modes.
2092 ieee80211_newstate_cb(void *xvap, int npending)
2094 struct ieee80211vap *vap = xvap;
2095 struct ieee80211com *ic = vap->iv_ic;
2096 enum ieee80211_state nstate, ostate;
2100 nstate = vap->iv_nstate;
2101 arg = vap->iv_nstate_arg;
2103 if (vap->iv_flags_ext & IEEE80211_FEXT_REINIT) {
2105 * We have been requested to drop back to the INIT before
2106 * proceeding to the new state.
2108 /* Deny any state changes while we are here. */
2109 vap->iv_nstate = IEEE80211_S_INIT;
2110 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2111 "%s: %s -> %s arg %d\n", __func__,
2112 ieee80211_state_name[vap->iv_state],
2113 ieee80211_state_name[vap->iv_nstate], arg);
2114 vap->iv_newstate(vap, vap->iv_nstate, 0);
2115 IEEE80211_LOCK_ASSERT(ic);
2116 vap->iv_flags_ext &= ~(IEEE80211_FEXT_REINIT |
2117 IEEE80211_FEXT_STATEWAIT);
2118 /* enqueue new state transition after cancel_scan() task */
2119 ieee80211_new_state_locked(vap, nstate, arg);
2123 ostate = vap->iv_state;
2124 if (nstate == IEEE80211_S_SCAN && ostate != IEEE80211_S_INIT) {
2126 * SCAN was forced; e.g. on beacon miss. Force other running
2127 * vap's to INIT state and mark them as waiting for the scan to
2128 * complete. This insures they don't interfere with our
2129 * scanning. Since we are single threaded the vaps can not
2130 * transition again while we are executing.
2132 * XXX not always right, assumes ap follows sta
2136 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2137 "%s: %s -> %s arg %d\n", __func__,
2138 ieee80211_state_name[ostate], ieee80211_state_name[nstate], arg);
2140 rc = vap->iv_newstate(vap, nstate, arg);
2141 IEEE80211_LOCK_ASSERT(ic);
2142 vap->iv_flags_ext &= ~IEEE80211_FEXT_STATEWAIT;
2144 /* State transition failed */
2145 KASSERT(rc != EINPROGRESS, ("iv_newstate was deferred"));
2146 KASSERT(nstate != IEEE80211_S_INIT,
2147 ("INIT state change failed"));
2148 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2149 "%s: %s returned error %d\n", __func__,
2150 ieee80211_state_name[nstate], rc);
2154 /* No actual transition, skip post processing */
2155 if (ostate == nstate)
2158 if (nstate == IEEE80211_S_RUN) {
2160 * OACTIVE may be set on the vap if the upper layer
2161 * tried to transmit (e.g. IPv6 NDP) before we reach
2162 * RUN state. Clear it and restart xmit.
2164 * Note this can also happen as a result of SLEEP->RUN
2165 * (i.e. coming out of power save mode).
2167 vap->iv_ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
2170 * XXX TODO Kick-start a VAP queue - this should be a method!
2173 /* bring up any vaps waiting on us */
2175 } else if (nstate == IEEE80211_S_INIT) {
2177 * Flush the scan cache if we did the last scan (XXX?)
2178 * and flush any frames on send queues from this vap.
2179 * Note the mgt q is used only for legacy drivers and
2180 * will go away shortly.
2182 ieee80211_scan_flush(vap);
2185 * XXX TODO: ic/vap queue flush
2189 IEEE80211_UNLOCK(ic);
2193 * Public interface for initiating a state machine change.
2194 * This routine single-threads the request and coordinates
2195 * the scheduling of multiple vaps for the purpose of selecting
2196 * an operating channel. Specifically the following scenarios
2198 * o only one vap can be selecting a channel so on transition to
2199 * SCAN state if another vap is already scanning then
2200 * mark the caller for later processing and return without
2201 * doing anything (XXX? expectations by caller of synchronous operation)
2202 * o only one vap can be doing CAC of a channel so on transition to
2203 * CAC state if another vap is already scanning for radar then
2204 * mark the caller for later processing and return without
2205 * doing anything (XXX? expectations by caller of synchronous operation)
2206 * o if another vap is already running when a request is made
2207 * to SCAN then an operating channel has been chosen; bypass
2208 * the scan and just join the channel
2210 * Note that the state change call is done through the iv_newstate
2211 * method pointer so any driver routine gets invoked. The driver
2212 * will normally call back into operating mode-specific
2213 * ieee80211_newstate routines (below) unless it needs to completely
2214 * bypass the state machine (e.g. because the firmware has it's
2215 * own idea how things should work). Bypassing the net80211 layer
2216 * is usually a mistake and indicates lack of proper integration
2217 * with the net80211 layer.
2220 ieee80211_new_state_locked(struct ieee80211vap *vap,
2221 enum ieee80211_state nstate, int arg)
2223 struct ieee80211com *ic = vap->iv_ic;
2224 struct ieee80211vap *vp;
2225 enum ieee80211_state ostate;
2226 int nrunning, nscanning;
2228 IEEE80211_LOCK_ASSERT(ic);
2230 if (vap->iv_flags_ext & IEEE80211_FEXT_STATEWAIT) {
2231 if (vap->iv_nstate == IEEE80211_S_INIT ||
2232 ((vap->iv_state == IEEE80211_S_INIT ||
2233 (vap->iv_flags_ext & IEEE80211_FEXT_REINIT)) &&
2234 vap->iv_nstate == IEEE80211_S_SCAN &&
2235 nstate > IEEE80211_S_SCAN)) {
2237 * XXX The vap is being stopped/started,
2238 * do not allow any other state changes
2239 * until this is completed.
2241 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2242 "%s: %s -> %s (%s) transition discarded\n",
2244 ieee80211_state_name[vap->iv_state],
2245 ieee80211_state_name[nstate],
2246 ieee80211_state_name[vap->iv_nstate]);
2248 } else if (vap->iv_state != vap->iv_nstate) {
2250 /* Warn if the previous state hasn't completed. */
2251 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2252 "%s: pending %s -> %s transition lost\n", __func__,
2253 ieee80211_state_name[vap->iv_state],
2254 ieee80211_state_name[vap->iv_nstate]);
2256 /* XXX temporarily enable to identify issues */
2257 if_printf(vap->iv_ifp,
2258 "%s: pending %s -> %s transition lost\n",
2259 __func__, ieee80211_state_name[vap->iv_state],
2260 ieee80211_state_name[vap->iv_nstate]);
2265 nrunning = nscanning = 0;
2266 /* XXX can track this state instead of calculating */
2267 TAILQ_FOREACH(vp, &ic->ic_vaps, iv_next) {
2269 if (vp->iv_state >= IEEE80211_S_RUN)
2271 /* XXX doesn't handle bg scan */
2272 /* NB: CAC+AUTH+ASSOC treated like SCAN */
2273 else if (vp->iv_state > IEEE80211_S_INIT)
2277 ostate = vap->iv_state;
2278 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2279 "%s: %s -> %s (nrunning %d nscanning %d)\n", __func__,
2280 ieee80211_state_name[ostate], ieee80211_state_name[nstate],
2281 nrunning, nscanning);
2283 case IEEE80211_S_SCAN:
2284 if (ostate == IEEE80211_S_INIT) {
2286 * INIT -> SCAN happens on initial bringup.
2288 KASSERT(!(nscanning && nrunning),
2289 ("%d scanning and %d running", nscanning, nrunning));
2292 * Someone is scanning, defer our state
2293 * change until the work has completed.
2295 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2296 "%s: defer %s -> %s\n",
2297 __func__, ieee80211_state_name[ostate],
2298 ieee80211_state_name[nstate]);
2299 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT;
2304 * Someone is operating; just join the channel
2308 /* XXX check each opmode, adhoc? */
2309 if (vap->iv_opmode == IEEE80211_M_STA)
2310 nstate = IEEE80211_S_SCAN;
2312 nstate = IEEE80211_S_RUN;
2313 #ifdef IEEE80211_DEBUG
2314 if (nstate != IEEE80211_S_SCAN) {
2315 IEEE80211_DPRINTF(vap,
2316 IEEE80211_MSG_STATE,
2317 "%s: override, now %s -> %s\n",
2319 ieee80211_state_name[ostate],
2320 ieee80211_state_name[nstate]);
2326 case IEEE80211_S_RUN:
2327 if (vap->iv_opmode == IEEE80211_M_WDS &&
2328 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) &&
2331 * Legacy WDS with someone else scanning; don't
2332 * go online until that completes as we should
2333 * follow the other vap to the channel they choose.
2335 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2336 "%s: defer %s -> %s (legacy WDS)\n", __func__,
2337 ieee80211_state_name[ostate],
2338 ieee80211_state_name[nstate]);
2339 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT;
2342 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
2343 IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) &&
2344 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) &&
2345 !IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) {
2347 * This is a DFS channel, transition to CAC state
2348 * instead of RUN. This allows us to initiate
2349 * Channel Availability Check (CAC) as specified
2352 nstate = IEEE80211_S_CAC;
2353 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2354 "%s: override %s -> %s (DFS)\n", __func__,
2355 ieee80211_state_name[ostate],
2356 ieee80211_state_name[nstate]);
2359 case IEEE80211_S_INIT:
2360 /* cancel any scan in progress */
2361 ieee80211_cancel_scan(vap);
2362 if (ostate == IEEE80211_S_INIT ) {
2363 /* XXX don't believe this */
2364 /* INIT -> INIT. nothing to do */
2365 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT;
2371 /* defer the state change to a thread */
2372 vap->iv_nstate = nstate;
2373 vap->iv_nstate_arg = arg;
2374 vap->iv_flags_ext |= IEEE80211_FEXT_STATEWAIT;
2375 ieee80211_runtask(ic, &vap->iv_nstate_task);
2380 ieee80211_new_state(struct ieee80211vap *vap,
2381 enum ieee80211_state nstate, int arg)
2383 struct ieee80211com *ic = vap->iv_ic;
2387 rc = ieee80211_new_state_locked(vap, nstate, arg);
2388 IEEE80211_UNLOCK(ic);