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 restart_vaps(void *, int);
248 static void ieee80211_newstate_cb(void *, int);
251 null_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
252 const struct ieee80211_bpf_params *params)
255 ic_printf(ni->ni_ic, "missing ic_raw_xmit callback, drop frame\n");
261 ieee80211_proto_attach(struct ieee80211com *ic)
265 /* override the 802.3 setting */
266 hdrlen = ic->ic_headroom
267 + sizeof(struct ieee80211_qosframe_addr4)
268 + IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN
269 + IEEE80211_WEP_EXTIVLEN;
270 /* XXX no way to recalculate on ifdetach */
271 if (ALIGN(hdrlen) > max_linkhdr) {
272 /* XXX sanity check... */
273 max_linkhdr = ALIGN(hdrlen);
274 max_hdr = max_linkhdr + max_protohdr;
275 max_datalen = MHLEN - max_hdr;
277 ic->ic_protmode = IEEE80211_PROT_CTSONLY;
279 TASK_INIT(&ic->ic_parent_task, 0, parent_updown, ic);
280 TASK_INIT(&ic->ic_mcast_task, 0, update_mcast, ic);
281 TASK_INIT(&ic->ic_promisc_task, 0, update_promisc, ic);
282 TASK_INIT(&ic->ic_chan_task, 0, update_channel, ic);
283 TASK_INIT(&ic->ic_bmiss_task, 0, beacon_miss, ic);
284 TASK_INIT(&ic->ic_chw_task, 0, update_chw, ic);
285 TASK_INIT(&ic->ic_restart_task, 0, restart_vaps, ic);
287 ic->ic_wme.wme_hipri_switch_hysteresis =
288 AGGRESSIVE_MODE_SWITCH_HYSTERESIS;
290 /* initialize management frame handlers */
291 ic->ic_send_mgmt = ieee80211_send_mgmt;
292 ic->ic_raw_xmit = null_raw_xmit;
294 ieee80211_adhoc_attach(ic);
295 ieee80211_sta_attach(ic);
296 ieee80211_wds_attach(ic);
297 ieee80211_hostap_attach(ic);
298 #ifdef IEEE80211_SUPPORT_MESH
299 ieee80211_mesh_attach(ic);
301 ieee80211_monitor_attach(ic);
305 ieee80211_proto_detach(struct ieee80211com *ic)
307 ieee80211_monitor_detach(ic);
308 #ifdef IEEE80211_SUPPORT_MESH
309 ieee80211_mesh_detach(ic);
311 ieee80211_hostap_detach(ic);
312 ieee80211_wds_detach(ic);
313 ieee80211_adhoc_detach(ic);
314 ieee80211_sta_detach(ic);
318 null_update_beacon(struct ieee80211vap *vap, int item)
323 ieee80211_proto_vattach(struct ieee80211vap *vap)
325 struct ieee80211com *ic = vap->iv_ic;
326 struct ifnet *ifp = vap->iv_ifp;
329 /* override the 802.3 setting */
330 ifp->if_hdrlen = ic->ic_headroom
331 + sizeof(struct ieee80211_qosframe_addr4)
332 + IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN
333 + IEEE80211_WEP_EXTIVLEN;
335 vap->iv_rtsthreshold = IEEE80211_RTS_DEFAULT;
336 vap->iv_fragthreshold = IEEE80211_FRAG_DEFAULT;
337 vap->iv_bmiss_max = IEEE80211_BMISS_MAX;
338 callout_init_mtx(&vap->iv_swbmiss, IEEE80211_LOCK_OBJ(ic), 0);
339 callout_init(&vap->iv_mgtsend, 1);
340 TASK_INIT(&vap->iv_nstate_task, 0, ieee80211_newstate_cb, vap);
341 TASK_INIT(&vap->iv_swbmiss_task, 0, beacon_swmiss, vap);
342 TASK_INIT(&vap->iv_wme_task, 0, vap_update_wme, vap);
344 * Install default tx rate handling: no fixed rate, lowest
345 * supported rate for mgmt and multicast frames. Default
346 * max retry count. These settings can be changed by the
347 * driver and/or user applications.
349 for (i = IEEE80211_MODE_11A; i < IEEE80211_MODE_MAX; i++) {
350 const struct ieee80211_rateset *rs = &ic->ic_sup_rates[i];
352 vap->iv_txparms[i].ucastrate = IEEE80211_FIXED_RATE_NONE;
355 * Setting the management rate to MCS 0 assumes that the
356 * BSS Basic rate set is empty and the BSS Basic MCS set
359 * Since we're not checking this, default to the lowest
360 * defined rate for this mode.
362 * At least one 11n AP (DLINK DIR-825) is reported to drop
363 * some MCS management traffic (eg BA response frames.)
365 * See also: 9.6.0 of the 802.11n-2009 specification.
368 if (i == IEEE80211_MODE_11NA || i == IEEE80211_MODE_11NG) {
369 vap->iv_txparms[i].mgmtrate = 0 | IEEE80211_RATE_MCS;
370 vap->iv_txparms[i].mcastrate = 0 | IEEE80211_RATE_MCS;
372 vap->iv_txparms[i].mgmtrate =
373 rs->rs_rates[0] & IEEE80211_RATE_VAL;
374 vap->iv_txparms[i].mcastrate =
375 rs->rs_rates[0] & IEEE80211_RATE_VAL;
378 vap->iv_txparms[i].mgmtrate = rs->rs_rates[0] & IEEE80211_RATE_VAL;
379 vap->iv_txparms[i].mcastrate = rs->rs_rates[0] & IEEE80211_RATE_VAL;
380 vap->iv_txparms[i].maxretry = IEEE80211_TXMAX_DEFAULT;
382 vap->iv_roaming = IEEE80211_ROAMING_AUTO;
384 vap->iv_update_beacon = null_update_beacon;
385 vap->iv_deliver_data = ieee80211_deliver_data;
387 /* attach support for operating mode */
388 ic->ic_vattach[vap->iv_opmode](vap);
392 ieee80211_proto_vdetach(struct ieee80211vap *vap)
394 #define FREEAPPIE(ie) do { \
396 IEEE80211_FREE(ie, M_80211_NODE_IE); \
399 * Detach operating mode module.
401 if (vap->iv_opdetach != NULL)
402 vap->iv_opdetach(vap);
404 * This should not be needed as we detach when reseting
405 * the state but be conservative here since the
406 * authenticator may do things like spawn kernel threads.
408 if (vap->iv_auth->ia_detach != NULL)
409 vap->iv_auth->ia_detach(vap);
411 * Detach any ACL'ator.
413 if (vap->iv_acl != NULL)
414 vap->iv_acl->iac_detach(vap);
416 FREEAPPIE(vap->iv_appie_beacon);
417 FREEAPPIE(vap->iv_appie_probereq);
418 FREEAPPIE(vap->iv_appie_proberesp);
419 FREEAPPIE(vap->iv_appie_assocreq);
420 FREEAPPIE(vap->iv_appie_assocresp);
421 FREEAPPIE(vap->iv_appie_wpa);
426 * Simple-minded authenticator module support.
429 #define IEEE80211_AUTH_MAX (IEEE80211_AUTH_WPA+1)
430 /* XXX well-known names */
431 static const char *auth_modnames[IEEE80211_AUTH_MAX] = {
432 "wlan_internal", /* IEEE80211_AUTH_NONE */
433 "wlan_internal", /* IEEE80211_AUTH_OPEN */
434 "wlan_internal", /* IEEE80211_AUTH_SHARED */
435 "wlan_xauth", /* IEEE80211_AUTH_8021X */
436 "wlan_internal", /* IEEE80211_AUTH_AUTO */
437 "wlan_xauth", /* IEEE80211_AUTH_WPA */
439 static const struct ieee80211_authenticator *authenticators[IEEE80211_AUTH_MAX];
441 static const struct ieee80211_authenticator auth_internal = {
442 .ia_name = "wlan_internal",
445 .ia_node_join = NULL,
446 .ia_node_leave = NULL,
450 * Setup internal authenticators once; they are never unregistered.
453 ieee80211_auth_setup(void)
455 ieee80211_authenticator_register(IEEE80211_AUTH_OPEN, &auth_internal);
456 ieee80211_authenticator_register(IEEE80211_AUTH_SHARED, &auth_internal);
457 ieee80211_authenticator_register(IEEE80211_AUTH_AUTO, &auth_internal);
459 SYSINIT(wlan_auth, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_auth_setup, NULL);
461 const struct ieee80211_authenticator *
462 ieee80211_authenticator_get(int auth)
464 if (auth >= IEEE80211_AUTH_MAX)
466 if (authenticators[auth] == NULL)
467 ieee80211_load_module(auth_modnames[auth]);
468 return authenticators[auth];
472 ieee80211_authenticator_register(int type,
473 const struct ieee80211_authenticator *auth)
475 if (type >= IEEE80211_AUTH_MAX)
477 authenticators[type] = auth;
481 ieee80211_authenticator_unregister(int type)
484 if (type >= IEEE80211_AUTH_MAX)
486 authenticators[type] = NULL;
490 * Very simple-minded ACL module support.
492 /* XXX just one for now */
493 static const struct ieee80211_aclator *acl = NULL;
496 ieee80211_aclator_register(const struct ieee80211_aclator *iac)
498 printf("wlan: %s acl policy registered\n", iac->iac_name);
503 ieee80211_aclator_unregister(const struct ieee80211_aclator *iac)
507 printf("wlan: %s acl policy unregistered\n", iac->iac_name);
510 const struct ieee80211_aclator *
511 ieee80211_aclator_get(const char *name)
514 ieee80211_load_module("wlan_acl");
515 return acl != NULL && strcmp(acl->iac_name, name) == 0 ? acl : NULL;
519 ieee80211_print_essid(const uint8_t *essid, int len)
524 if (len > IEEE80211_NWID_LEN)
525 len = IEEE80211_NWID_LEN;
526 /* determine printable or not */
527 for (i = 0, p = essid; i < len; i++, p++) {
528 if (*p < ' ' || *p > 0x7e)
533 for (i = 0, p = essid; i < len; i++, p++)
538 for (i = 0, p = essid; i < len; i++, p++)
544 ieee80211_dump_pkt(struct ieee80211com *ic,
545 const uint8_t *buf, int len, int rate, int rssi)
547 const struct ieee80211_frame *wh;
550 wh = (const struct ieee80211_frame *)buf;
551 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) {
552 case IEEE80211_FC1_DIR_NODS:
553 printf("NODS %s", ether_sprintf(wh->i_addr2));
554 printf("->%s", ether_sprintf(wh->i_addr1));
555 printf("(%s)", ether_sprintf(wh->i_addr3));
557 case IEEE80211_FC1_DIR_TODS:
558 printf("TODS %s", ether_sprintf(wh->i_addr2));
559 printf("->%s", ether_sprintf(wh->i_addr3));
560 printf("(%s)", ether_sprintf(wh->i_addr1));
562 case IEEE80211_FC1_DIR_FROMDS:
563 printf("FRDS %s", ether_sprintf(wh->i_addr3));
564 printf("->%s", ether_sprintf(wh->i_addr1));
565 printf("(%s)", ether_sprintf(wh->i_addr2));
567 case IEEE80211_FC1_DIR_DSTODS:
568 printf("DSDS %s", ether_sprintf((const uint8_t *)&wh[1]));
569 printf("->%s", ether_sprintf(wh->i_addr3));
570 printf("(%s", ether_sprintf(wh->i_addr2));
571 printf("->%s)", ether_sprintf(wh->i_addr1));
574 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) {
575 case IEEE80211_FC0_TYPE_DATA:
578 case IEEE80211_FC0_TYPE_MGT:
579 printf(" %s", ieee80211_mgt_subtype_name(wh->i_fc[0]));
582 printf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK);
585 if (IEEE80211_QOS_HAS_SEQ(wh)) {
586 const struct ieee80211_qosframe *qwh =
587 (const struct ieee80211_qosframe *)buf;
588 printf(" QoS [TID %u%s]", qwh->i_qos[0] & IEEE80211_QOS_TID,
589 qwh->i_qos[0] & IEEE80211_QOS_ACKPOLICY ? " ACM" : "");
591 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
594 off = ieee80211_anyhdrspace(ic, wh);
595 printf(" WEP [IV %.02x %.02x %.02x",
596 buf[off+0], buf[off+1], buf[off+2]);
597 if (buf[off+IEEE80211_WEP_IVLEN] & IEEE80211_WEP_EXTIV)
598 printf(" %.02x %.02x %.02x",
599 buf[off+4], buf[off+5], buf[off+6]);
600 printf(" KID %u]", buf[off+IEEE80211_WEP_IVLEN] >> 6);
603 printf(" %dM", rate / 2);
605 printf(" +%d", rssi);
608 for (i = 0; i < len; i++) {
611 printf("%02x", buf[i]);
618 findrix(const struct ieee80211_rateset *rs, int r)
622 for (i = 0; i < rs->rs_nrates; i++)
623 if ((rs->rs_rates[i] & IEEE80211_RATE_VAL) == r)
629 ieee80211_fix_rate(struct ieee80211_node *ni,
630 struct ieee80211_rateset *nrs, int flags)
632 struct ieee80211vap *vap = ni->ni_vap;
633 struct ieee80211com *ic = ni->ni_ic;
634 int i, j, rix, error;
635 int okrate, badrate, fixedrate, ucastrate;
636 const struct ieee80211_rateset *srs;
640 okrate = badrate = 0;
641 ucastrate = vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)].ucastrate;
642 if (ucastrate != IEEE80211_FIXED_RATE_NONE) {
644 * Workaround awkwardness with fixed rate. We are called
645 * to check both the legacy rate set and the HT rate set
646 * but we must apply any legacy fixed rate check only to the
647 * legacy rate set and vice versa. We cannot tell what type
648 * of rate set we've been given (legacy or HT) but we can
649 * distinguish the fixed rate type (MCS have 0x80 set).
650 * So to deal with this the caller communicates whether to
651 * check MCS or legacy rate using the flags and we use the
652 * type of any fixed rate to avoid applying an MCS to a
653 * legacy rate and vice versa.
655 if (ucastrate & 0x80) {
656 if (flags & IEEE80211_F_DOFRATE)
657 flags &= ~IEEE80211_F_DOFRATE;
658 } else if ((ucastrate & 0x80) == 0) {
659 if (flags & IEEE80211_F_DOFMCS)
660 flags &= ~IEEE80211_F_DOFMCS;
662 /* NB: required to make MCS match below work */
663 ucastrate &= IEEE80211_RATE_VAL;
665 fixedrate = IEEE80211_FIXED_RATE_NONE;
667 * XXX we are called to process both MCS and legacy rates;
668 * we must use the appropriate basic rate set or chaos will
669 * ensue; for now callers that want MCS must supply
670 * IEEE80211_F_DOBRS; at some point we'll need to split this
671 * function so there are two variants, one for MCS and one
674 if (flags & IEEE80211_F_DOBRS)
675 srs = (const struct ieee80211_rateset *)
676 ieee80211_get_suphtrates(ic, ni->ni_chan);
678 srs = ieee80211_get_suprates(ic, ni->ni_chan);
679 for (i = 0; i < nrs->rs_nrates; ) {
680 if (flags & IEEE80211_F_DOSORT) {
684 for (j = i + 1; j < nrs->rs_nrates; j++) {
685 if (IEEE80211_RV(nrs->rs_rates[i]) >
686 IEEE80211_RV(nrs->rs_rates[j])) {
687 r = nrs->rs_rates[i];
688 nrs->rs_rates[i] = nrs->rs_rates[j];
689 nrs->rs_rates[j] = r;
693 r = nrs->rs_rates[i] & IEEE80211_RATE_VAL;
696 * Check for fixed rate.
701 * Check against supported rates.
703 rix = findrix(srs, r);
704 if (flags & IEEE80211_F_DONEGO) {
707 * A rate in the node's rate set is not
708 * supported. If this is a basic rate and we
709 * are operating as a STA then this is an error.
710 * Otherwise we just discard/ignore the rate.
712 if ((flags & IEEE80211_F_JOIN) &&
713 (nrs->rs_rates[i] & IEEE80211_RATE_BASIC))
715 } else if ((flags & IEEE80211_F_JOIN) == 0) {
717 * Overwrite with the supported rate
718 * value so any basic rate bit is set.
720 nrs->rs_rates[i] = srs->rs_rates[rix];
723 if ((flags & IEEE80211_F_DODEL) && rix < 0) {
725 * Delete unacceptable rates.
728 for (j = i; j < nrs->rs_nrates; j++)
729 nrs->rs_rates[j] = nrs->rs_rates[j + 1];
730 nrs->rs_rates[j] = 0;
734 okrate = nrs->rs_rates[i];
737 if (okrate == 0 || error != 0 ||
738 ((flags & (IEEE80211_F_DOFRATE|IEEE80211_F_DOFMCS)) &&
739 fixedrate != ucastrate)) {
740 IEEE80211_NOTE(vap, IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni,
741 "%s: flags 0x%x okrate %d error %d fixedrate 0x%x "
742 "ucastrate %x\n", __func__, fixedrate, ucastrate, flags);
743 return badrate | IEEE80211_RATE_BASIC;
745 return IEEE80211_RV(okrate);
749 * Reset 11g-related state.
752 ieee80211_reset_erp(struct ieee80211com *ic)
754 ic->ic_flags &= ~IEEE80211_F_USEPROT;
755 ic->ic_nonerpsta = 0;
756 ic->ic_longslotsta = 0;
758 * Short slot time is enabled only when operating in 11g
759 * and not in an IBSS. We must also honor whether or not
760 * the driver is capable of doing it.
762 ieee80211_set_shortslottime(ic,
763 IEEE80211_IS_CHAN_A(ic->ic_curchan) ||
764 IEEE80211_IS_CHAN_HT(ic->ic_curchan) ||
765 (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
766 ic->ic_opmode == IEEE80211_M_HOSTAP &&
767 (ic->ic_caps & IEEE80211_C_SHSLOT)));
769 * Set short preamble and ERP barker-preamble flags.
771 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) ||
772 (ic->ic_caps & IEEE80211_C_SHPREAMBLE)) {
773 ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
774 ic->ic_flags &= ~IEEE80211_F_USEBARKER;
776 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
777 ic->ic_flags |= IEEE80211_F_USEBARKER;
782 * Set the short slot time state and notify the driver.
785 ieee80211_set_shortslottime(struct ieee80211com *ic, int onoff)
788 ic->ic_flags |= IEEE80211_F_SHSLOT;
790 ic->ic_flags &= ~IEEE80211_F_SHSLOT;
792 if (ic->ic_updateslot != NULL)
793 ic->ic_updateslot(ic);
797 * Check if the specified rate set supports ERP.
798 * NB: the rate set is assumed to be sorted.
801 ieee80211_iserp_rateset(const struct ieee80211_rateset *rs)
803 static const int rates[] = { 2, 4, 11, 22, 12, 24, 48 };
806 if (rs->rs_nrates < nitems(rates))
808 for (i = 0; i < nitems(rates); i++) {
809 for (j = 0; j < rs->rs_nrates; j++) {
810 int r = rs->rs_rates[j] & IEEE80211_RATE_VAL;
824 * Mark the basic rates for the rate table based on the
825 * operating mode. For real 11g we mark all the 11b rates
826 * and 6, 12, and 24 OFDM. For 11b compatibility we mark only
827 * 11b rates. There's also a pseudo 11a-mode used to mark only
828 * the basic OFDM rates.
831 setbasicrates(struct ieee80211_rateset *rs,
832 enum ieee80211_phymode mode, int add)
834 static const struct ieee80211_rateset basic[IEEE80211_MODE_MAX] = {
835 [IEEE80211_MODE_11A] = { 3, { 12, 24, 48 } },
836 [IEEE80211_MODE_11B] = { 2, { 2, 4 } },
838 [IEEE80211_MODE_11G] = { 4, { 2, 4, 11, 22 } },
839 [IEEE80211_MODE_TURBO_A] = { 3, { 12, 24, 48 } },
840 [IEEE80211_MODE_TURBO_G] = { 4, { 2, 4, 11, 22 } },
841 [IEEE80211_MODE_STURBO_A] = { 3, { 12, 24, 48 } },
842 [IEEE80211_MODE_HALF] = { 3, { 6, 12, 24 } },
843 [IEEE80211_MODE_QUARTER] = { 3, { 3, 6, 12 } },
844 [IEEE80211_MODE_11NA] = { 3, { 12, 24, 48 } },
846 [IEEE80211_MODE_11NG] = { 4, { 2, 4, 11, 22 } },
848 [IEEE80211_MODE_VHT_2GHZ] = { 4, { 2, 4, 11, 22 } },
849 [IEEE80211_MODE_VHT_5GHZ] = { 3, { 12, 24, 48 } },
853 for (i = 0; i < rs->rs_nrates; i++) {
855 rs->rs_rates[i] &= IEEE80211_RATE_VAL;
856 for (j = 0; j < basic[mode].rs_nrates; j++)
857 if (basic[mode].rs_rates[j] == rs->rs_rates[i]) {
858 rs->rs_rates[i] |= IEEE80211_RATE_BASIC;
865 * Set the basic rates in a rate set.
868 ieee80211_setbasicrates(struct ieee80211_rateset *rs,
869 enum ieee80211_phymode mode)
871 setbasicrates(rs, mode, 0);
875 * Add basic rates to a rate set.
878 ieee80211_addbasicrates(struct ieee80211_rateset *rs,
879 enum ieee80211_phymode mode)
881 setbasicrates(rs, mode, 1);
885 * WME protocol support.
887 * The default 11a/b/g/n parameters come from the WiFi Alliance WMM
888 * System Interopability Test Plan (v1.4, Appendix F) and the 802.11n
889 * Draft 2.0 Test Plan (Appendix D).
891 * Static/Dynamic Turbo mode settings come from Atheros.
893 typedef struct phyParamType {
901 static const struct phyParamType phyParamForAC_BE[IEEE80211_MODE_MAX] = {
902 [IEEE80211_MODE_AUTO] = { 3, 4, 6, 0, 0 },
903 [IEEE80211_MODE_11A] = { 3, 4, 6, 0, 0 },
904 [IEEE80211_MODE_11B] = { 3, 4, 6, 0, 0 },
905 [IEEE80211_MODE_11G] = { 3, 4, 6, 0, 0 },
906 [IEEE80211_MODE_FH] = { 3, 4, 6, 0, 0 },
907 [IEEE80211_MODE_TURBO_A]= { 2, 3, 5, 0, 0 },
908 [IEEE80211_MODE_TURBO_G]= { 2, 3, 5, 0, 0 },
909 [IEEE80211_MODE_STURBO_A]={ 2, 3, 5, 0, 0 },
910 [IEEE80211_MODE_HALF] = { 3, 4, 6, 0, 0 },
911 [IEEE80211_MODE_QUARTER]= { 3, 4, 6, 0, 0 },
912 [IEEE80211_MODE_11NA] = { 3, 4, 6, 0, 0 },
913 [IEEE80211_MODE_11NG] = { 3, 4, 6, 0, 0 },
914 [IEEE80211_MODE_VHT_2GHZ] = { 3, 4, 6, 0, 0 },
915 [IEEE80211_MODE_VHT_5GHZ] = { 3, 4, 6, 0, 0 },
917 static const struct phyParamType phyParamForAC_BK[IEEE80211_MODE_MAX] = {
918 [IEEE80211_MODE_AUTO] = { 7, 4, 10, 0, 0 },
919 [IEEE80211_MODE_11A] = { 7, 4, 10, 0, 0 },
920 [IEEE80211_MODE_11B] = { 7, 4, 10, 0, 0 },
921 [IEEE80211_MODE_11G] = { 7, 4, 10, 0, 0 },
922 [IEEE80211_MODE_FH] = { 7, 4, 10, 0, 0 },
923 [IEEE80211_MODE_TURBO_A]= { 7, 3, 10, 0, 0 },
924 [IEEE80211_MODE_TURBO_G]= { 7, 3, 10, 0, 0 },
925 [IEEE80211_MODE_STURBO_A]={ 7, 3, 10, 0, 0 },
926 [IEEE80211_MODE_HALF] = { 7, 4, 10, 0, 0 },
927 [IEEE80211_MODE_QUARTER]= { 7, 4, 10, 0, 0 },
928 [IEEE80211_MODE_11NA] = { 7, 4, 10, 0, 0 },
929 [IEEE80211_MODE_11NG] = { 7, 4, 10, 0, 0 },
930 [IEEE80211_MODE_VHT_2GHZ] = { 7, 4, 10, 0, 0 },
931 [IEEE80211_MODE_VHT_5GHZ] = { 7, 4, 10, 0, 0 },
933 static const struct phyParamType phyParamForAC_VI[IEEE80211_MODE_MAX] = {
934 [IEEE80211_MODE_AUTO] = { 1, 3, 4, 94, 0 },
935 [IEEE80211_MODE_11A] = { 1, 3, 4, 94, 0 },
936 [IEEE80211_MODE_11B] = { 1, 3, 4, 188, 0 },
937 [IEEE80211_MODE_11G] = { 1, 3, 4, 94, 0 },
938 [IEEE80211_MODE_FH] = { 1, 3, 4, 188, 0 },
939 [IEEE80211_MODE_TURBO_A]= { 1, 2, 3, 94, 0 },
940 [IEEE80211_MODE_TURBO_G]= { 1, 2, 3, 94, 0 },
941 [IEEE80211_MODE_STURBO_A]={ 1, 2, 3, 94, 0 },
942 [IEEE80211_MODE_HALF] = { 1, 3, 4, 94, 0 },
943 [IEEE80211_MODE_QUARTER]= { 1, 3, 4, 94, 0 },
944 [IEEE80211_MODE_11NA] = { 1, 3, 4, 94, 0 },
945 [IEEE80211_MODE_11NG] = { 1, 3, 4, 94, 0 },
946 [IEEE80211_MODE_VHT_2GHZ] = { 1, 3, 4, 94, 0 },
947 [IEEE80211_MODE_VHT_5GHZ] = { 1, 3, 4, 94, 0 },
949 static const struct phyParamType phyParamForAC_VO[IEEE80211_MODE_MAX] = {
950 [IEEE80211_MODE_AUTO] = { 1, 2, 3, 47, 0 },
951 [IEEE80211_MODE_11A] = { 1, 2, 3, 47, 0 },
952 [IEEE80211_MODE_11B] = { 1, 2, 3, 102, 0 },
953 [IEEE80211_MODE_11G] = { 1, 2, 3, 47, 0 },
954 [IEEE80211_MODE_FH] = { 1, 2, 3, 102, 0 },
955 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 },
956 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 },
957 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 },
958 [IEEE80211_MODE_HALF] = { 1, 2, 3, 47, 0 },
959 [IEEE80211_MODE_QUARTER]= { 1, 2, 3, 47, 0 },
960 [IEEE80211_MODE_11NA] = { 1, 2, 3, 47, 0 },
961 [IEEE80211_MODE_11NG] = { 1, 2, 3, 47, 0 },
962 [IEEE80211_MODE_VHT_2GHZ] = { 1, 2, 3, 47, 0 },
963 [IEEE80211_MODE_VHT_5GHZ] = { 1, 2, 3, 47, 0 },
966 static const struct phyParamType bssPhyParamForAC_BE[IEEE80211_MODE_MAX] = {
967 [IEEE80211_MODE_AUTO] = { 3, 4, 10, 0, 0 },
968 [IEEE80211_MODE_11A] = { 3, 4, 10, 0, 0 },
969 [IEEE80211_MODE_11B] = { 3, 4, 10, 0, 0 },
970 [IEEE80211_MODE_11G] = { 3, 4, 10, 0, 0 },
971 [IEEE80211_MODE_FH] = { 3, 4, 10, 0, 0 },
972 [IEEE80211_MODE_TURBO_A]= { 2, 3, 10, 0, 0 },
973 [IEEE80211_MODE_TURBO_G]= { 2, 3, 10, 0, 0 },
974 [IEEE80211_MODE_STURBO_A]={ 2, 3, 10, 0, 0 },
975 [IEEE80211_MODE_HALF] = { 3, 4, 10, 0, 0 },
976 [IEEE80211_MODE_QUARTER]= { 3, 4, 10, 0, 0 },
977 [IEEE80211_MODE_11NA] = { 3, 4, 10, 0, 0 },
978 [IEEE80211_MODE_11NG] = { 3, 4, 10, 0, 0 },
980 static const struct phyParamType bssPhyParamForAC_VI[IEEE80211_MODE_MAX] = {
981 [IEEE80211_MODE_AUTO] = { 2, 3, 4, 94, 0 },
982 [IEEE80211_MODE_11A] = { 2, 3, 4, 94, 0 },
983 [IEEE80211_MODE_11B] = { 2, 3, 4, 188, 0 },
984 [IEEE80211_MODE_11G] = { 2, 3, 4, 94, 0 },
985 [IEEE80211_MODE_FH] = { 2, 3, 4, 188, 0 },
986 [IEEE80211_MODE_TURBO_A]= { 2, 2, 3, 94, 0 },
987 [IEEE80211_MODE_TURBO_G]= { 2, 2, 3, 94, 0 },
988 [IEEE80211_MODE_STURBO_A]={ 2, 2, 3, 94, 0 },
989 [IEEE80211_MODE_HALF] = { 2, 3, 4, 94, 0 },
990 [IEEE80211_MODE_QUARTER]= { 2, 3, 4, 94, 0 },
991 [IEEE80211_MODE_11NA] = { 2, 3, 4, 94, 0 },
992 [IEEE80211_MODE_11NG] = { 2, 3, 4, 94, 0 },
994 static const struct phyParamType bssPhyParamForAC_VO[IEEE80211_MODE_MAX] = {
995 [IEEE80211_MODE_AUTO] = { 2, 2, 3, 47, 0 },
996 [IEEE80211_MODE_11A] = { 2, 2, 3, 47, 0 },
997 [IEEE80211_MODE_11B] = { 2, 2, 3, 102, 0 },
998 [IEEE80211_MODE_11G] = { 2, 2, 3, 47, 0 },
999 [IEEE80211_MODE_FH] = { 2, 2, 3, 102, 0 },
1000 [IEEE80211_MODE_TURBO_A]= { 1, 2, 2, 47, 0 },
1001 [IEEE80211_MODE_TURBO_G]= { 1, 2, 2, 47, 0 },
1002 [IEEE80211_MODE_STURBO_A]={ 1, 2, 2, 47, 0 },
1003 [IEEE80211_MODE_HALF] = { 2, 2, 3, 47, 0 },
1004 [IEEE80211_MODE_QUARTER]= { 2, 2, 3, 47, 0 },
1005 [IEEE80211_MODE_11NA] = { 2, 2, 3, 47, 0 },
1006 [IEEE80211_MODE_11NG] = { 2, 2, 3, 47, 0 },
1010 _setifsparams(struct wmeParams *wmep, const paramType *phy)
1012 wmep->wmep_aifsn = phy->aifsn;
1013 wmep->wmep_logcwmin = phy->logcwmin;
1014 wmep->wmep_logcwmax = phy->logcwmax;
1015 wmep->wmep_txopLimit = phy->txopLimit;
1019 setwmeparams(struct ieee80211vap *vap, const char *type, int ac,
1020 struct wmeParams *wmep, const paramType *phy)
1022 wmep->wmep_acm = phy->acm;
1023 _setifsparams(wmep, phy);
1025 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1026 "set %s (%s) [acm %u aifsn %u logcwmin %u logcwmax %u txop %u]\n",
1027 ieee80211_wme_acnames[ac], type,
1028 wmep->wmep_acm, wmep->wmep_aifsn, wmep->wmep_logcwmin,
1029 wmep->wmep_logcwmax, wmep->wmep_txopLimit);
1033 ieee80211_wme_initparams_locked(struct ieee80211vap *vap)
1035 struct ieee80211com *ic = vap->iv_ic;
1036 struct ieee80211_wme_state *wme = &ic->ic_wme;
1037 const paramType *pPhyParam, *pBssPhyParam;
1038 struct wmeParams *wmep;
1039 enum ieee80211_phymode mode;
1042 IEEE80211_LOCK_ASSERT(ic);
1044 if ((ic->ic_caps & IEEE80211_C_WME) == 0 || ic->ic_nrunning > 1)
1048 * Clear the wme cap_info field so a qoscount from a previous
1049 * vap doesn't confuse later code which only parses the beacon
1050 * field and updates hardware when said field changes.
1051 * Otherwise the hardware is programmed with defaults, not what
1052 * the beacon actually announces.
1054 wme->wme_wmeChanParams.cap_info = 0;
1057 * Select mode; we can be called early in which case we
1058 * always use auto mode. We know we'll be called when
1059 * entering the RUN state with bsschan setup properly
1060 * so state will eventually get set correctly
1062 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC)
1063 mode = ieee80211_chan2mode(ic->ic_bsschan);
1065 mode = IEEE80211_MODE_AUTO;
1066 for (i = 0; i < WME_NUM_AC; i++) {
1069 pPhyParam = &phyParamForAC_BK[mode];
1070 pBssPhyParam = &phyParamForAC_BK[mode];
1073 pPhyParam = &phyParamForAC_VI[mode];
1074 pBssPhyParam = &bssPhyParamForAC_VI[mode];
1077 pPhyParam = &phyParamForAC_VO[mode];
1078 pBssPhyParam = &bssPhyParamForAC_VO[mode];
1082 pPhyParam = &phyParamForAC_BE[mode];
1083 pBssPhyParam = &bssPhyParamForAC_BE[mode];
1086 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i];
1087 if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
1088 setwmeparams(vap, "chan", i, wmep, pPhyParam);
1090 setwmeparams(vap, "chan", i, wmep, pBssPhyParam);
1092 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i];
1093 setwmeparams(vap, "bss ", i, wmep, pBssPhyParam);
1095 /* NB: check ic_bss to avoid NULL deref on initial attach */
1096 if (vap->iv_bss != NULL) {
1098 * Calculate aggressive mode switching threshold based
1099 * on beacon interval. This doesn't need locking since
1100 * we're only called before entering the RUN state at
1101 * which point we start sending beacon frames.
1103 wme->wme_hipri_switch_thresh =
1104 (HIGH_PRI_SWITCH_THRESH * vap->iv_bss->ni_intval) / 100;
1105 wme->wme_flags &= ~WME_F_AGGRMODE;
1106 ieee80211_wme_updateparams(vap);
1111 ieee80211_wme_initparams(struct ieee80211vap *vap)
1113 struct ieee80211com *ic = vap->iv_ic;
1116 ieee80211_wme_initparams_locked(vap);
1117 IEEE80211_UNLOCK(ic);
1121 * Update WME parameters for ourself and the BSS.
1124 ieee80211_wme_updateparams_locked(struct ieee80211vap *vap)
1126 static const paramType aggrParam[IEEE80211_MODE_MAX] = {
1127 [IEEE80211_MODE_AUTO] = { 2, 4, 10, 64, 0 },
1128 [IEEE80211_MODE_11A] = { 2, 4, 10, 64, 0 },
1129 [IEEE80211_MODE_11B] = { 2, 5, 10, 64, 0 },
1130 [IEEE80211_MODE_11G] = { 2, 4, 10, 64, 0 },
1131 [IEEE80211_MODE_FH] = { 2, 5, 10, 64, 0 },
1132 [IEEE80211_MODE_TURBO_A] = { 1, 3, 10, 64, 0 },
1133 [IEEE80211_MODE_TURBO_G] = { 1, 3, 10, 64, 0 },
1134 [IEEE80211_MODE_STURBO_A] = { 1, 3, 10, 64, 0 },
1135 [IEEE80211_MODE_HALF] = { 2, 4, 10, 64, 0 },
1136 [IEEE80211_MODE_QUARTER] = { 2, 4, 10, 64, 0 },
1137 [IEEE80211_MODE_11NA] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/
1138 [IEEE80211_MODE_11NG] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/
1139 [IEEE80211_MODE_VHT_2GHZ] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/
1140 [IEEE80211_MODE_VHT_5GHZ] = { 2, 4, 10, 64, 0 }, /* XXXcheck*/
1142 struct ieee80211com *ic = vap->iv_ic;
1143 struct ieee80211_wme_state *wme = &ic->ic_wme;
1144 const struct wmeParams *wmep;
1145 struct wmeParams *chanp, *bssp;
1146 enum ieee80211_phymode mode;
1148 int do_aggrmode = 0;
1151 * Set up the channel access parameters for the physical
1152 * device. First populate the configured settings.
1154 for (i = 0; i < WME_NUM_AC; i++) {
1155 chanp = &wme->wme_chanParams.cap_wmeParams[i];
1156 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i];
1157 chanp->wmep_aifsn = wmep->wmep_aifsn;
1158 chanp->wmep_logcwmin = wmep->wmep_logcwmin;
1159 chanp->wmep_logcwmax = wmep->wmep_logcwmax;
1160 chanp->wmep_txopLimit = wmep->wmep_txopLimit;
1162 chanp = &wme->wme_bssChanParams.cap_wmeParams[i];
1163 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i];
1164 chanp->wmep_aifsn = wmep->wmep_aifsn;
1165 chanp->wmep_logcwmin = wmep->wmep_logcwmin;
1166 chanp->wmep_logcwmax = wmep->wmep_logcwmax;
1167 chanp->wmep_txopLimit = wmep->wmep_txopLimit;
1171 * Select mode; we can be called early in which case we
1172 * always use auto mode. We know we'll be called when
1173 * entering the RUN state with bsschan setup properly
1174 * so state will eventually get set correctly
1176 if (ic->ic_bsschan != IEEE80211_CHAN_ANYC)
1177 mode = ieee80211_chan2mode(ic->ic_bsschan);
1179 mode = IEEE80211_MODE_AUTO;
1182 * This implements aggressive mode as found in certain
1183 * vendors' AP's. When there is significant high
1184 * priority (VI/VO) traffic in the BSS throttle back BE
1185 * traffic by using conservative parameters. Otherwise
1186 * BE uses aggressive params to optimize performance of
1187 * legacy/non-QoS traffic.
1190 /* Hostap? Only if aggressive mode is enabled */
1191 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
1192 (wme->wme_flags & WME_F_AGGRMODE) != 0)
1196 * Station? Only if we're in a non-QoS BSS.
1198 else if ((vap->iv_opmode == IEEE80211_M_STA &&
1199 (vap->iv_bss->ni_flags & IEEE80211_NODE_QOS) == 0))
1203 * IBSS? Only if we we have WME enabled.
1205 else if ((vap->iv_opmode == IEEE80211_M_IBSS) &&
1206 (vap->iv_flags & IEEE80211_F_WME))
1210 * If WME is disabled on this VAP, default to aggressive mode
1211 * regardless of the configuration.
1213 if ((vap->iv_flags & IEEE80211_F_WME) == 0)
1221 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE];
1222 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE];
1224 chanp->wmep_aifsn = bssp->wmep_aifsn = aggrParam[mode].aifsn;
1225 chanp->wmep_logcwmin = bssp->wmep_logcwmin =
1226 aggrParam[mode].logcwmin;
1227 chanp->wmep_logcwmax = bssp->wmep_logcwmax =
1228 aggrParam[mode].logcwmax;
1229 chanp->wmep_txopLimit = bssp->wmep_txopLimit =
1230 (vap->iv_flags & IEEE80211_F_BURST) ?
1231 aggrParam[mode].txopLimit : 0;
1232 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1233 "update %s (chan+bss) [acm %u aifsn %u logcwmin %u "
1234 "logcwmax %u txop %u]\n", ieee80211_wme_acnames[WME_AC_BE],
1235 chanp->wmep_acm, chanp->wmep_aifsn, chanp->wmep_logcwmin,
1236 chanp->wmep_logcwmax, chanp->wmep_txopLimit);
1241 * Change the contention window based on the number of associated
1242 * stations. If the number of associated stations is 1 and
1243 * aggressive mode is enabled, lower the contention window even
1246 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
1247 ic->ic_sta_assoc < 2 && (wme->wme_flags & WME_F_AGGRMODE) != 0) {
1248 static const uint8_t logCwMin[IEEE80211_MODE_MAX] = {
1249 [IEEE80211_MODE_AUTO] = 3,
1250 [IEEE80211_MODE_11A] = 3,
1251 [IEEE80211_MODE_11B] = 4,
1252 [IEEE80211_MODE_11G] = 3,
1253 [IEEE80211_MODE_FH] = 4,
1254 [IEEE80211_MODE_TURBO_A] = 3,
1255 [IEEE80211_MODE_TURBO_G] = 3,
1256 [IEEE80211_MODE_STURBO_A] = 3,
1257 [IEEE80211_MODE_HALF] = 3,
1258 [IEEE80211_MODE_QUARTER] = 3,
1259 [IEEE80211_MODE_11NA] = 3,
1260 [IEEE80211_MODE_11NG] = 3,
1261 [IEEE80211_MODE_VHT_2GHZ] = 3,
1262 [IEEE80211_MODE_VHT_5GHZ] = 3,
1264 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE];
1265 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE];
1267 chanp->wmep_logcwmin = bssp->wmep_logcwmin = logCwMin[mode];
1268 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1269 "update %s (chan+bss) logcwmin %u\n",
1270 ieee80211_wme_acnames[WME_AC_BE], chanp->wmep_logcwmin);
1274 * Arrange for the beacon update.
1276 * XXX what about MBSS, WDS?
1278 if (vap->iv_opmode == IEEE80211_M_HOSTAP
1279 || vap->iv_opmode == IEEE80211_M_IBSS) {
1281 * Arrange for a beacon update and bump the parameter
1282 * set number so associated stations load the new values.
1284 wme->wme_bssChanParams.cap_info =
1285 (wme->wme_bssChanParams.cap_info+1) & WME_QOSINFO_COUNT;
1286 ieee80211_beacon_notify(vap, IEEE80211_BEACON_WME);
1289 /* schedule the deferred WME update */
1290 ieee80211_runtask(ic, &vap->iv_wme_task);
1292 IEEE80211_DPRINTF(vap, IEEE80211_MSG_WME,
1293 "%s: WME params updated, cap_info 0x%x\n", __func__,
1294 vap->iv_opmode == IEEE80211_M_STA ?
1295 wme->wme_wmeChanParams.cap_info :
1296 wme->wme_bssChanParams.cap_info);
1300 ieee80211_wme_updateparams(struct ieee80211vap *vap)
1302 struct ieee80211com *ic = vap->iv_ic;
1304 if (ic->ic_caps & IEEE80211_C_WME) {
1306 ieee80211_wme_updateparams_locked(vap);
1307 IEEE80211_UNLOCK(ic);
1312 ieee80211_wme_vap_getparams(struct ieee80211vap *vap, struct chanAccParams *wp)
1315 memcpy(wp, &vap->iv_ic->ic_wme.wme_chanParams, sizeof(*wp));
1319 ieee80211_wme_ic_getparams(struct ieee80211com *ic, struct chanAccParams *wp)
1322 memcpy(wp, &ic->ic_wme.wme_chanParams, sizeof(*wp));
1326 parent_updown(void *arg, int npending)
1328 struct ieee80211com *ic = arg;
1334 update_mcast(void *arg, int npending)
1336 struct ieee80211com *ic = arg;
1338 ic->ic_update_mcast(ic);
1342 update_promisc(void *arg, int npending)
1344 struct ieee80211com *ic = arg;
1346 ic->ic_update_promisc(ic);
1350 update_channel(void *arg, int npending)
1352 struct ieee80211com *ic = arg;
1354 ic->ic_set_channel(ic);
1355 ieee80211_radiotap_chan_change(ic);
1359 update_chw(void *arg, int npending)
1361 struct ieee80211com *ic = arg;
1364 * XXX should we defer the channel width _config_ update until now?
1366 ic->ic_update_chw(ic);
1370 * Deferred WME update.
1372 * In preparation for per-VAP WME configuration, call the VAP
1373 * method if the VAP requires it. Otherwise, just call the
1374 * older global method. There isn't a per-VAP WME configuration
1375 * just yet so for now just use the global configuration.
1378 vap_update_wme(void *arg, int npending)
1380 struct ieee80211vap *vap = arg;
1381 struct ieee80211com *ic = vap->iv_ic;
1383 if (vap->iv_wme_update != NULL)
1384 vap->iv_wme_update(vap,
1385 ic->ic_wme.wme_chanParams.cap_wmeParams);
1387 ic->ic_wme.wme_update(ic);
1391 restart_vaps(void *arg, int npending)
1393 struct ieee80211com *ic = arg;
1395 ieee80211_suspend_all(ic);
1396 ieee80211_resume_all(ic);
1400 * Block until the parent is in a known state. This is
1401 * used after any operations that dispatch a task (e.g.
1402 * to auto-configure the parent device up/down).
1405 ieee80211_waitfor_parent(struct ieee80211com *ic)
1407 taskqueue_block(ic->ic_tq);
1408 ieee80211_draintask(ic, &ic->ic_parent_task);
1409 ieee80211_draintask(ic, &ic->ic_mcast_task);
1410 ieee80211_draintask(ic, &ic->ic_promisc_task);
1411 ieee80211_draintask(ic, &ic->ic_chan_task);
1412 ieee80211_draintask(ic, &ic->ic_bmiss_task);
1413 ieee80211_draintask(ic, &ic->ic_chw_task);
1414 taskqueue_unblock(ic->ic_tq);
1418 * Check to see whether the current channel needs reset.
1420 * Some devices don't handle being given an invalid channel
1421 * in their operating mode very well (eg wpi(4) will throw a
1422 * firmware exception.)
1424 * Return 0 if we're ok, 1 if the channel needs to be reset.
1426 * See PR kern/202502.
1429 ieee80211_start_check_reset_chan(struct ieee80211vap *vap)
1431 struct ieee80211com *ic = vap->iv_ic;
1433 if ((vap->iv_opmode == IEEE80211_M_IBSS &&
1434 IEEE80211_IS_CHAN_NOADHOC(ic->ic_curchan)) ||
1435 (vap->iv_opmode == IEEE80211_M_HOSTAP &&
1436 IEEE80211_IS_CHAN_NOHOSTAP(ic->ic_curchan)))
1442 * Reset the curchan to a known good state.
1445 ieee80211_start_reset_chan(struct ieee80211vap *vap)
1447 struct ieee80211com *ic = vap->iv_ic;
1449 ic->ic_curchan = &ic->ic_channels[0];
1453 * Start a vap running. If this is the first vap to be
1454 * set running on the underlying device then we
1455 * automatically bring the device up.
1458 ieee80211_start_locked(struct ieee80211vap *vap)
1460 struct ifnet *ifp = vap->iv_ifp;
1461 struct ieee80211com *ic = vap->iv_ic;
1463 IEEE80211_LOCK_ASSERT(ic);
1465 IEEE80211_DPRINTF(vap,
1466 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1467 "start running, %d vaps running\n", ic->ic_nrunning);
1469 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
1471 * Mark us running. Note that it's ok to do this first;
1472 * if we need to bring the parent device up we defer that
1473 * to avoid dropping the com lock. We expect the device
1474 * to respond to being marked up by calling back into us
1475 * through ieee80211_start_all at which point we'll come
1476 * back in here and complete the work.
1478 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1480 * We are not running; if this we are the first vap
1481 * to be brought up auto-up the parent if necessary.
1483 if (ic->ic_nrunning++ == 0) {
1485 /* reset the channel to a known good channel */
1486 if (ieee80211_start_check_reset_chan(vap))
1487 ieee80211_start_reset_chan(vap);
1489 IEEE80211_DPRINTF(vap,
1490 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1491 "%s: up parent %s\n", __func__, ic->ic_name);
1492 ieee80211_runtask(ic, &ic->ic_parent_task);
1497 * If the parent is up and running, then kick the
1498 * 802.11 state machine as appropriate.
1500 if (vap->iv_roaming != IEEE80211_ROAMING_MANUAL) {
1501 if (vap->iv_opmode == IEEE80211_M_STA) {
1503 /* XXX bypasses scan too easily; disable for now */
1505 * Try to be intelligent about clocking the state
1506 * machine. If we're currently in RUN state then
1507 * we should be able to apply any new state/parameters
1508 * simply by re-associating. Otherwise we need to
1509 * re-scan to select an appropriate ap.
1511 if (vap->iv_state >= IEEE80211_S_RUN)
1512 ieee80211_new_state_locked(vap,
1513 IEEE80211_S_ASSOC, 1);
1516 ieee80211_new_state_locked(vap,
1517 IEEE80211_S_SCAN, 0);
1520 * For monitor+wds mode there's nothing to do but
1521 * start running. Otherwise if this is the first
1522 * vap to be brought up, start a scan which may be
1523 * preempted if the station is locked to a particular
1526 vap->iv_flags_ext |= IEEE80211_FEXT_REINIT;
1527 if (vap->iv_opmode == IEEE80211_M_MONITOR ||
1528 vap->iv_opmode == IEEE80211_M_WDS)
1529 ieee80211_new_state_locked(vap,
1530 IEEE80211_S_RUN, -1);
1532 ieee80211_new_state_locked(vap,
1533 IEEE80211_S_SCAN, 0);
1539 * Start a single vap.
1542 ieee80211_init(void *arg)
1544 struct ieee80211vap *vap = arg;
1546 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1549 IEEE80211_LOCK(vap->iv_ic);
1550 ieee80211_start_locked(vap);
1551 IEEE80211_UNLOCK(vap->iv_ic);
1555 * Start all runnable vap's on a device.
1558 ieee80211_start_all(struct ieee80211com *ic)
1560 struct ieee80211vap *vap;
1563 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1564 struct ifnet *ifp = vap->iv_ifp;
1565 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */
1566 ieee80211_start_locked(vap);
1568 IEEE80211_UNLOCK(ic);
1572 * Stop a vap. We force it down using the state machine
1573 * then mark it's ifnet not running. If this is the last
1574 * vap running on the underlying device then we close it
1575 * too to insure it will be properly initialized when the
1576 * next vap is brought up.
1579 ieee80211_stop_locked(struct ieee80211vap *vap)
1581 struct ieee80211com *ic = vap->iv_ic;
1582 struct ifnet *ifp = vap->iv_ifp;
1584 IEEE80211_LOCK_ASSERT(ic);
1586 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1587 "stop running, %d vaps running\n", ic->ic_nrunning);
1589 ieee80211_new_state_locked(vap, IEEE80211_S_INIT, -1);
1590 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
1591 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; /* mark us stopped */
1592 if (--ic->ic_nrunning == 0) {
1593 IEEE80211_DPRINTF(vap,
1594 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
1595 "down parent %s\n", ic->ic_name);
1596 ieee80211_runtask(ic, &ic->ic_parent_task);
1602 ieee80211_stop(struct ieee80211vap *vap)
1604 struct ieee80211com *ic = vap->iv_ic;
1607 ieee80211_stop_locked(vap);
1608 IEEE80211_UNLOCK(ic);
1612 * Stop all vap's running on a device.
1615 ieee80211_stop_all(struct ieee80211com *ic)
1617 struct ieee80211vap *vap;
1620 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1621 struct ifnet *ifp = vap->iv_ifp;
1622 if (IFNET_IS_UP_RUNNING(ifp)) /* NB: avoid recursion */
1623 ieee80211_stop_locked(vap);
1625 IEEE80211_UNLOCK(ic);
1627 ieee80211_waitfor_parent(ic);
1631 * Stop all vap's running on a device and arrange
1632 * for those that were running to be resumed.
1635 ieee80211_suspend_all(struct ieee80211com *ic)
1637 struct ieee80211vap *vap;
1640 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1641 struct ifnet *ifp = vap->iv_ifp;
1642 if (IFNET_IS_UP_RUNNING(ifp)) { /* NB: avoid recursion */
1643 vap->iv_flags_ext |= IEEE80211_FEXT_RESUME;
1644 ieee80211_stop_locked(vap);
1647 IEEE80211_UNLOCK(ic);
1649 ieee80211_waitfor_parent(ic);
1653 * Start all vap's marked for resume.
1656 ieee80211_resume_all(struct ieee80211com *ic)
1658 struct ieee80211vap *vap;
1661 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1662 struct ifnet *ifp = vap->iv_ifp;
1663 if (!IFNET_IS_UP_RUNNING(ifp) &&
1664 (vap->iv_flags_ext & IEEE80211_FEXT_RESUME)) {
1665 vap->iv_flags_ext &= ~IEEE80211_FEXT_RESUME;
1666 ieee80211_start_locked(vap);
1669 IEEE80211_UNLOCK(ic);
1673 * Restart all vap's running on a device.
1676 ieee80211_restart_all(struct ieee80211com *ic)
1679 * NB: do not use ieee80211_runtask here, we will
1680 * block & drain net80211 taskqueue.
1682 taskqueue_enqueue(taskqueue_thread, &ic->ic_restart_task);
1686 ieee80211_beacon_miss(struct ieee80211com *ic)
1689 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1690 /* Process in a taskq, the handler may reenter the driver */
1691 ieee80211_runtask(ic, &ic->ic_bmiss_task);
1693 IEEE80211_UNLOCK(ic);
1697 beacon_miss(void *arg, int npending)
1699 struct ieee80211com *ic = arg;
1700 struct ieee80211vap *vap;
1703 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1705 * We only pass events through for sta vap's in RUN+ state;
1706 * may be too restrictive but for now this saves all the
1707 * handlers duplicating these checks.
1709 if (vap->iv_opmode == IEEE80211_M_STA &&
1710 vap->iv_state >= IEEE80211_S_RUN &&
1711 vap->iv_bmiss != NULL)
1714 IEEE80211_UNLOCK(ic);
1718 beacon_swmiss(void *arg, int npending)
1720 struct ieee80211vap *vap = arg;
1721 struct ieee80211com *ic = vap->iv_ic;
1724 if (vap->iv_state >= IEEE80211_S_RUN) {
1725 /* XXX Call multiple times if npending > zero? */
1728 IEEE80211_UNLOCK(ic);
1732 * Software beacon miss handling. Check if any beacons
1733 * were received in the last period. If not post a
1734 * beacon miss; otherwise reset the counter.
1737 ieee80211_swbmiss(void *arg)
1739 struct ieee80211vap *vap = arg;
1740 struct ieee80211com *ic = vap->iv_ic;
1742 IEEE80211_LOCK_ASSERT(ic);
1744 KASSERT(vap->iv_state >= IEEE80211_S_RUN,
1745 ("wrong state %d", vap->iv_state));
1747 if (ic->ic_flags & IEEE80211_F_SCAN) {
1749 * If scanning just ignore and reset state. If we get a
1750 * bmiss after coming out of scan because we haven't had
1751 * time to receive a beacon then we should probe the AP
1752 * before posting a real bmiss (unless iv_bmiss_max has
1753 * been artifiically lowered). A cleaner solution might
1754 * be to disable the timer on scan start/end but to handle
1755 * case of multiple sta vap's we'd need to disable the
1756 * timers of all affected vap's.
1758 vap->iv_swbmiss_count = 0;
1759 } else if (vap->iv_swbmiss_count == 0) {
1760 if (vap->iv_bmiss != NULL)
1761 ieee80211_runtask(ic, &vap->iv_swbmiss_task);
1763 vap->iv_swbmiss_count = 0;
1764 callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period,
1765 ieee80211_swbmiss, vap);
1769 * Start an 802.11h channel switch. We record the parameters,
1770 * mark the operation pending, notify each vap through the
1771 * beacon update mechanism so it can update the beacon frame
1772 * contents, and then switch vap's to CSA state to block outbound
1773 * traffic. Devices that handle CSA directly can use the state
1774 * switch to do the right thing so long as they call
1775 * ieee80211_csa_completeswitch when it's time to complete the
1776 * channel change. Devices that depend on the net80211 layer can
1777 * use ieee80211_beacon_update to handle the countdown and the
1781 ieee80211_csa_startswitch(struct ieee80211com *ic,
1782 struct ieee80211_channel *c, int mode, int count)
1784 struct ieee80211vap *vap;
1786 IEEE80211_LOCK_ASSERT(ic);
1788 ic->ic_csa_newchan = c;
1789 ic->ic_csa_mode = mode;
1790 ic->ic_csa_count = count;
1791 ic->ic_flags |= IEEE80211_F_CSAPENDING;
1792 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1793 if (vap->iv_opmode == IEEE80211_M_HOSTAP ||
1794 vap->iv_opmode == IEEE80211_M_IBSS ||
1795 vap->iv_opmode == IEEE80211_M_MBSS)
1796 ieee80211_beacon_notify(vap, IEEE80211_BEACON_CSA);
1797 /* switch to CSA state to block outbound traffic */
1798 if (vap->iv_state == IEEE80211_S_RUN)
1799 ieee80211_new_state_locked(vap, IEEE80211_S_CSA, 0);
1801 ieee80211_notify_csa(ic, c, mode, count);
1805 * Complete the channel switch by transitioning all CSA VAPs to RUN.
1806 * This is called by both the completion and cancellation functions
1807 * so each VAP is placed back in the RUN state and can thus transmit.
1810 csa_completeswitch(struct ieee80211com *ic)
1812 struct ieee80211vap *vap;
1814 ic->ic_csa_newchan = NULL;
1815 ic->ic_flags &= ~IEEE80211_F_CSAPENDING;
1817 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1818 if (vap->iv_state == IEEE80211_S_CSA)
1819 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0);
1823 * Complete an 802.11h channel switch started by ieee80211_csa_startswitch.
1824 * We clear state and move all vap's in CSA state to RUN state
1825 * so they can again transmit.
1827 * Although this may not be completely correct, update the BSS channel
1828 * for each VAP to the newly configured channel. The setcurchan sets
1829 * the current operating channel for the interface (so the radio does
1830 * switch over) but the VAP BSS isn't updated, leading to incorrectly
1831 * reported information via ioctl.
1834 ieee80211_csa_completeswitch(struct ieee80211com *ic)
1836 struct ieee80211vap *vap;
1838 IEEE80211_LOCK_ASSERT(ic);
1840 KASSERT(ic->ic_flags & IEEE80211_F_CSAPENDING, ("csa not pending"));
1842 ieee80211_setcurchan(ic, ic->ic_csa_newchan);
1843 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1844 if (vap->iv_state == IEEE80211_S_CSA)
1845 vap->iv_bss->ni_chan = ic->ic_curchan;
1847 csa_completeswitch(ic);
1851 * Cancel an 802.11h channel switch started by ieee80211_csa_startswitch.
1852 * We clear state and move all vap's in CSA state to RUN state
1853 * so they can again transmit.
1856 ieee80211_csa_cancelswitch(struct ieee80211com *ic)
1858 IEEE80211_LOCK_ASSERT(ic);
1860 csa_completeswitch(ic);
1864 * Complete a DFS CAC started by ieee80211_dfs_cac_start.
1865 * We clear state and move all vap's in CAC state to RUN state.
1868 ieee80211_cac_completeswitch(struct ieee80211vap *vap0)
1870 struct ieee80211com *ic = vap0->iv_ic;
1871 struct ieee80211vap *vap;
1875 * Complete CAC state change for lead vap first; then
1876 * clock all the other vap's waiting.
1878 KASSERT(vap0->iv_state == IEEE80211_S_CAC,
1879 ("wrong state %d", vap0->iv_state));
1880 ieee80211_new_state_locked(vap0, IEEE80211_S_RUN, 0);
1882 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1883 if (vap->iv_state == IEEE80211_S_CAC && vap != vap0)
1884 ieee80211_new_state_locked(vap, IEEE80211_S_RUN, 0);
1885 IEEE80211_UNLOCK(ic);
1889 * Force all vap's other than the specified vap to the INIT state
1890 * and mark them as waiting for a scan to complete. These vaps
1891 * will be brought up when the scan completes and the scanning vap
1892 * reaches RUN state by wakeupwaiting.
1895 markwaiting(struct ieee80211vap *vap0)
1897 struct ieee80211com *ic = vap0->iv_ic;
1898 struct ieee80211vap *vap;
1900 IEEE80211_LOCK_ASSERT(ic);
1903 * A vap list entry can not disappear since we are running on the
1904 * taskqueue and a vap destroy will queue and drain another state
1907 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1910 if (vap->iv_state != IEEE80211_S_INIT) {
1911 /* NB: iv_newstate may drop the lock */
1912 vap->iv_newstate(vap, IEEE80211_S_INIT, 0);
1913 IEEE80211_LOCK_ASSERT(ic);
1914 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT;
1920 * Wakeup all vap's waiting for a scan to complete. This is the
1921 * companion to markwaiting (above) and is used to coordinate
1922 * multiple vaps scanning.
1923 * This is called from the state taskqueue.
1926 wakeupwaiting(struct ieee80211vap *vap0)
1928 struct ieee80211com *ic = vap0->iv_ic;
1929 struct ieee80211vap *vap;
1931 IEEE80211_LOCK_ASSERT(ic);
1934 * A vap list entry can not disappear since we are running on the
1935 * taskqueue and a vap destroy will queue and drain another state
1938 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1941 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANWAIT) {
1942 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT;
1943 /* NB: sta's cannot go INIT->RUN */
1944 /* NB: iv_newstate may drop the lock */
1945 vap->iv_newstate(vap,
1946 vap->iv_opmode == IEEE80211_M_STA ?
1947 IEEE80211_S_SCAN : IEEE80211_S_RUN, 0);
1948 IEEE80211_LOCK_ASSERT(ic);
1954 * Handle post state change work common to all operating modes.
1957 ieee80211_newstate_cb(void *xvap, int npending)
1959 struct ieee80211vap *vap = xvap;
1960 struct ieee80211com *ic = vap->iv_ic;
1961 enum ieee80211_state nstate, ostate;
1965 nstate = vap->iv_nstate;
1966 arg = vap->iv_nstate_arg;
1968 if (vap->iv_flags_ext & IEEE80211_FEXT_REINIT) {
1970 * We have been requested to drop back to the INIT before
1971 * proceeding to the new state.
1973 /* Deny any state changes while we are here. */
1974 vap->iv_nstate = IEEE80211_S_INIT;
1975 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
1976 "%s: %s -> %s arg %d\n", __func__,
1977 ieee80211_state_name[vap->iv_state],
1978 ieee80211_state_name[vap->iv_nstate], arg);
1979 vap->iv_newstate(vap, vap->iv_nstate, 0);
1980 IEEE80211_LOCK_ASSERT(ic);
1981 vap->iv_flags_ext &= ~(IEEE80211_FEXT_REINIT |
1982 IEEE80211_FEXT_STATEWAIT);
1983 /* enqueue new state transition after cancel_scan() task */
1984 ieee80211_new_state_locked(vap, nstate, arg);
1988 ostate = vap->iv_state;
1989 if (nstate == IEEE80211_S_SCAN && ostate != IEEE80211_S_INIT) {
1991 * SCAN was forced; e.g. on beacon miss. Force other running
1992 * vap's to INIT state and mark them as waiting for the scan to
1993 * complete. This insures they don't interfere with our
1994 * scanning. Since we are single threaded the vaps can not
1995 * transition again while we are executing.
1997 * XXX not always right, assumes ap follows sta
2001 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2002 "%s: %s -> %s arg %d\n", __func__,
2003 ieee80211_state_name[ostate], ieee80211_state_name[nstate], arg);
2005 rc = vap->iv_newstate(vap, nstate, arg);
2006 IEEE80211_LOCK_ASSERT(ic);
2007 vap->iv_flags_ext &= ~IEEE80211_FEXT_STATEWAIT;
2009 /* State transition failed */
2010 KASSERT(rc != EINPROGRESS, ("iv_newstate was deferred"));
2011 KASSERT(nstate != IEEE80211_S_INIT,
2012 ("INIT state change failed"));
2013 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2014 "%s: %s returned error %d\n", __func__,
2015 ieee80211_state_name[nstate], rc);
2019 /* No actual transition, skip post processing */
2020 if (ostate == nstate)
2023 if (nstate == IEEE80211_S_RUN) {
2025 * OACTIVE may be set on the vap if the upper layer
2026 * tried to transmit (e.g. IPv6 NDP) before we reach
2027 * RUN state. Clear it and restart xmit.
2029 * Note this can also happen as a result of SLEEP->RUN
2030 * (i.e. coming out of power save mode).
2032 vap->iv_ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
2035 * XXX TODO Kick-start a VAP queue - this should be a method!
2038 /* bring up any vaps waiting on us */
2040 } else if (nstate == IEEE80211_S_INIT) {
2042 * Flush the scan cache if we did the last scan (XXX?)
2043 * and flush any frames on send queues from this vap.
2044 * Note the mgt q is used only for legacy drivers and
2045 * will go away shortly.
2047 ieee80211_scan_flush(vap);
2050 * XXX TODO: ic/vap queue flush
2054 IEEE80211_UNLOCK(ic);
2058 * Public interface for initiating a state machine change.
2059 * This routine single-threads the request and coordinates
2060 * the scheduling of multiple vaps for the purpose of selecting
2061 * an operating channel. Specifically the following scenarios
2063 * o only one vap can be selecting a channel so on transition to
2064 * SCAN state if another vap is already scanning then
2065 * mark the caller for later processing and return without
2066 * doing anything (XXX? expectations by caller of synchronous operation)
2067 * o only one vap can be doing CAC of a channel so on transition to
2068 * CAC state if another vap is already scanning for radar then
2069 * mark the caller for later processing and return without
2070 * doing anything (XXX? expectations by caller of synchronous operation)
2071 * o if another vap is already running when a request is made
2072 * to SCAN then an operating channel has been chosen; bypass
2073 * the scan and just join the channel
2075 * Note that the state change call is done through the iv_newstate
2076 * method pointer so any driver routine gets invoked. The driver
2077 * will normally call back into operating mode-specific
2078 * ieee80211_newstate routines (below) unless it needs to completely
2079 * bypass the state machine (e.g. because the firmware has it's
2080 * own idea how things should work). Bypassing the net80211 layer
2081 * is usually a mistake and indicates lack of proper integration
2082 * with the net80211 layer.
2085 ieee80211_new_state_locked(struct ieee80211vap *vap,
2086 enum ieee80211_state nstate, int arg)
2088 struct ieee80211com *ic = vap->iv_ic;
2089 struct ieee80211vap *vp;
2090 enum ieee80211_state ostate;
2091 int nrunning, nscanning;
2093 IEEE80211_LOCK_ASSERT(ic);
2095 if (vap->iv_flags_ext & IEEE80211_FEXT_STATEWAIT) {
2096 if (vap->iv_nstate == IEEE80211_S_INIT ||
2097 ((vap->iv_state == IEEE80211_S_INIT ||
2098 (vap->iv_flags_ext & IEEE80211_FEXT_REINIT)) &&
2099 vap->iv_nstate == IEEE80211_S_SCAN &&
2100 nstate > IEEE80211_S_SCAN)) {
2102 * XXX The vap is being stopped/started,
2103 * do not allow any other state changes
2104 * until this is completed.
2106 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2107 "%s: %s -> %s (%s) transition discarded\n",
2109 ieee80211_state_name[vap->iv_state],
2110 ieee80211_state_name[nstate],
2111 ieee80211_state_name[vap->iv_nstate]);
2113 } else if (vap->iv_state != vap->iv_nstate) {
2115 /* Warn if the previous state hasn't completed. */
2116 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2117 "%s: pending %s -> %s transition lost\n", __func__,
2118 ieee80211_state_name[vap->iv_state],
2119 ieee80211_state_name[vap->iv_nstate]);
2121 /* XXX temporarily enable to identify issues */
2122 if_printf(vap->iv_ifp,
2123 "%s: pending %s -> %s transition lost\n",
2124 __func__, ieee80211_state_name[vap->iv_state],
2125 ieee80211_state_name[vap->iv_nstate]);
2130 nrunning = nscanning = 0;
2131 /* XXX can track this state instead of calculating */
2132 TAILQ_FOREACH(vp, &ic->ic_vaps, iv_next) {
2134 if (vp->iv_state >= IEEE80211_S_RUN)
2136 /* XXX doesn't handle bg scan */
2137 /* NB: CAC+AUTH+ASSOC treated like SCAN */
2138 else if (vp->iv_state > IEEE80211_S_INIT)
2142 ostate = vap->iv_state;
2143 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2144 "%s: %s -> %s (nrunning %d nscanning %d)\n", __func__,
2145 ieee80211_state_name[ostate], ieee80211_state_name[nstate],
2146 nrunning, nscanning);
2148 case IEEE80211_S_SCAN:
2149 if (ostate == IEEE80211_S_INIT) {
2151 * INIT -> SCAN happens on initial bringup.
2153 KASSERT(!(nscanning && nrunning),
2154 ("%d scanning and %d running", nscanning, nrunning));
2157 * Someone is scanning, defer our state
2158 * change until the work has completed.
2160 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2161 "%s: defer %s -> %s\n",
2162 __func__, ieee80211_state_name[ostate],
2163 ieee80211_state_name[nstate]);
2164 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT;
2169 * Someone is operating; just join the channel
2173 /* XXX check each opmode, adhoc? */
2174 if (vap->iv_opmode == IEEE80211_M_STA)
2175 nstate = IEEE80211_S_SCAN;
2177 nstate = IEEE80211_S_RUN;
2178 #ifdef IEEE80211_DEBUG
2179 if (nstate != IEEE80211_S_SCAN) {
2180 IEEE80211_DPRINTF(vap,
2181 IEEE80211_MSG_STATE,
2182 "%s: override, now %s -> %s\n",
2184 ieee80211_state_name[ostate],
2185 ieee80211_state_name[nstate]);
2191 case IEEE80211_S_RUN:
2192 if (vap->iv_opmode == IEEE80211_M_WDS &&
2193 (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) &&
2196 * Legacy WDS with someone else scanning; don't
2197 * go online until that completes as we should
2198 * follow the other vap to the channel they choose.
2200 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2201 "%s: defer %s -> %s (legacy WDS)\n", __func__,
2202 ieee80211_state_name[ostate],
2203 ieee80211_state_name[nstate]);
2204 vap->iv_flags_ext |= IEEE80211_FEXT_SCANWAIT;
2207 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
2208 IEEE80211_IS_CHAN_DFS(ic->ic_bsschan) &&
2209 (vap->iv_flags_ext & IEEE80211_FEXT_DFS) &&
2210 !IEEE80211_IS_CHAN_CACDONE(ic->ic_bsschan)) {
2212 * This is a DFS channel, transition to CAC state
2213 * instead of RUN. This allows us to initiate
2214 * Channel Availability Check (CAC) as specified
2217 nstate = IEEE80211_S_CAC;
2218 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
2219 "%s: override %s -> %s (DFS)\n", __func__,
2220 ieee80211_state_name[ostate],
2221 ieee80211_state_name[nstate]);
2224 case IEEE80211_S_INIT:
2225 /* cancel any scan in progress */
2226 ieee80211_cancel_scan(vap);
2227 if (ostate == IEEE80211_S_INIT ) {
2228 /* XXX don't believe this */
2229 /* INIT -> INIT. nothing to do */
2230 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANWAIT;
2236 /* defer the state change to a thread */
2237 vap->iv_nstate = nstate;
2238 vap->iv_nstate_arg = arg;
2239 vap->iv_flags_ext |= IEEE80211_FEXT_STATEWAIT;
2240 ieee80211_runtask(ic, &vap->iv_nstate_task);
2245 ieee80211_new_state(struct ieee80211vap *vap,
2246 enum ieee80211_state nstate, int arg)
2248 struct ieee80211com *ic = vap->iv_ic;
2252 rc = ieee80211_new_state_locked(vap, nstate, arg);
2253 IEEE80211_UNLOCK(ic);