2 * Copyright (c) 2001 Atsushi Onoe
3 * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
17 * Alternatively, this software may be distributed under the terms of the
18 * GNU General Public License ("GPL") version 2 as published by the Free
19 * Software Foundation.
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
37 * IEEE 802.11 protocol support.
42 #include <sys/param.h>
43 #include <sys/kernel.h>
44 #include <sys/systm.h>
46 #include <sys/socket.h>
49 #include <net/if_media.h>
50 #include <net/ethernet.h> /* XXX for ether_sprintf */
52 #include <net80211/ieee80211_var.h>
55 #define AGGRESSIVE_MODE_SWITCH_HYSTERESIS 3 /* pkts / 100ms */
56 #define HIGH_PRI_SWITCH_THRESH 10 /* pkts / 100ms */
58 #define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2)
60 const char *ieee80211_mgt_subtype_name[] = {
61 "assoc_req", "assoc_resp", "reassoc_req", "reassoc_resp",
62 "probe_req", "probe_resp", "reserved#6", "reserved#7",
63 "beacon", "atim", "disassoc", "auth",
64 "deauth", "reserved#13", "reserved#14", "reserved#15"
66 const char *ieee80211_ctl_subtype_name[] = {
67 "reserved#0", "reserved#1", "reserved#2", "reserved#3",
68 "reserved#3", "reserved#5", "reserved#6", "reserved#7",
69 "reserved#8", "reserved#9", "ps_poll", "rts",
70 "cts", "ack", "cf_end", "cf_end_ack"
72 const char *ieee80211_state_name[IEEE80211_S_MAX] = {
73 "INIT", /* IEEE80211_S_INIT */
74 "SCAN", /* IEEE80211_S_SCAN */
75 "AUTH", /* IEEE80211_S_AUTH */
76 "ASSOC", /* IEEE80211_S_ASSOC */
77 "RUN" /* IEEE80211_S_RUN */
79 const char *ieee80211_wme_acnames[] = {
87 static int ieee80211_newstate(struct ieee80211com *, enum ieee80211_state, int);
90 ieee80211_proto_attach(struct ieee80211com *ic)
92 struct ifnet *ifp = ic->ic_ifp;
94 /* XXX room for crypto */
95 ifp->if_hdrlen = sizeof(struct ieee80211_qosframe_addr4);
97 ic->ic_rtsthreshold = IEEE80211_RTS_DEFAULT;
98 ic->ic_fragthreshold = IEEE80211_FRAG_DEFAULT;
99 ic->ic_fixed_rate = IEEE80211_FIXED_RATE_NONE;
100 ic->ic_bmiss_max = IEEE80211_BMISS_MAX;
101 callout_init(&ic->ic_swbmiss, CALLOUT_MPSAFE);
102 ic->ic_mcast_rate = IEEE80211_MCAST_RATE_DEFAULT;
103 ic->ic_protmode = IEEE80211_PROT_CTSONLY;
104 ic->ic_roaming = IEEE80211_ROAMING_AUTO;
106 ic->ic_wme.wme_hipri_switch_hysteresis =
107 AGGRESSIVE_MODE_SWITCH_HYSTERESIS;
109 mtx_init(&ic->ic_mgtq.ifq_mtx, ifp->if_xname, "mgmt send q", MTX_DEF);
111 /* protocol state change handler */
112 ic->ic_newstate = ieee80211_newstate;
114 /* initialize management frame handlers */
115 ic->ic_recv_mgmt = ieee80211_recv_mgmt;
116 ic->ic_send_mgmt = ieee80211_send_mgmt;
117 ic->ic_raw_xmit = ieee80211_raw_xmit;
121 ieee80211_proto_detach(struct ieee80211com *ic)
125 * This should not be needed as we detach when reseting
126 * the state but be conservative here since the
127 * authenticator may do things like spawn kernel threads.
129 if (ic->ic_auth->ia_detach)
130 ic->ic_auth->ia_detach(ic);
132 IF_DRAIN(&ic->ic_mgtq);
133 mtx_destroy(&ic->ic_mgtq.ifq_mtx);
136 * Detach any ACL'ator.
138 if (ic->ic_acl != NULL)
139 ic->ic_acl->iac_detach(ic);
143 * Simple-minded authenticator module support.
146 #define IEEE80211_AUTH_MAX (IEEE80211_AUTH_WPA+1)
147 /* XXX well-known names */
148 static const char *auth_modnames[IEEE80211_AUTH_MAX] = {
149 "wlan_internal", /* IEEE80211_AUTH_NONE */
150 "wlan_internal", /* IEEE80211_AUTH_OPEN */
151 "wlan_internal", /* IEEE80211_AUTH_SHARED */
152 "wlan_xauth", /* IEEE80211_AUTH_8021X */
153 "wlan_internal", /* IEEE80211_AUTH_AUTO */
154 "wlan_xauth", /* IEEE80211_AUTH_WPA */
156 static const struct ieee80211_authenticator *authenticators[IEEE80211_AUTH_MAX];
158 static const struct ieee80211_authenticator auth_internal = {
159 .ia_name = "wlan_internal",
162 .ia_node_join = NULL,
163 .ia_node_leave = NULL,
167 * Setup internal authenticators once; they are never unregistered.
170 ieee80211_auth_setup(void)
172 ieee80211_authenticator_register(IEEE80211_AUTH_OPEN, &auth_internal);
173 ieee80211_authenticator_register(IEEE80211_AUTH_SHARED, &auth_internal);
174 ieee80211_authenticator_register(IEEE80211_AUTH_AUTO, &auth_internal);
176 SYSINIT(wlan_auth, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_auth_setup, NULL);
178 const struct ieee80211_authenticator *
179 ieee80211_authenticator_get(int auth)
181 if (auth >= IEEE80211_AUTH_MAX)
183 if (authenticators[auth] == NULL)
184 ieee80211_load_module(auth_modnames[auth]);
185 return authenticators[auth];
189 ieee80211_authenticator_register(int type,
190 const struct ieee80211_authenticator *auth)
192 if (type >= IEEE80211_AUTH_MAX)
194 authenticators[type] = auth;
198 ieee80211_authenticator_unregister(int type)
201 if (type >= IEEE80211_AUTH_MAX)
203 authenticators[type] = NULL;
207 * Very simple-minded ACL module support.
209 /* XXX just one for now */
210 static const struct ieee80211_aclator *acl = NULL;
213 ieee80211_aclator_register(const struct ieee80211_aclator *iac)
215 printf("wlan: %s acl policy registered\n", iac->iac_name);
220 ieee80211_aclator_unregister(const struct ieee80211_aclator *iac)
224 printf("wlan: %s acl policy unregistered\n", iac->iac_name);
227 const struct ieee80211_aclator *
228 ieee80211_aclator_get(const char *name)
231 ieee80211_load_module("wlan_acl");
232 return acl != NULL && strcmp(acl->iac_name, name) == 0 ? acl : NULL;
236 ieee80211_print_essid(const u_int8_t *essid, int len)
241 if (len > IEEE80211_NWID_LEN)
242 len = IEEE80211_NWID_LEN;
243 /* determine printable or not */
244 for (i = 0, p = essid; i < len; i++, p++) {
245 if (*p < ' ' || *p > 0x7e)
250 for (i = 0, p = essid; i < len; i++, p++)
255 for (i = 0, p = essid; i < len; i++, p++)
261 ieee80211_dump_pkt(const u_int8_t *buf, int len, int rate, int rssi)
263 const struct ieee80211_frame *wh;
266 wh = (const struct ieee80211_frame *)buf;
267 switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) {
268 case IEEE80211_FC1_DIR_NODS:
269 printf("NODS %s", ether_sprintf(wh->i_addr2));
270 printf("->%s", ether_sprintf(wh->i_addr1));
271 printf("(%s)", ether_sprintf(wh->i_addr3));
273 case IEEE80211_FC1_DIR_TODS:
274 printf("TODS %s", ether_sprintf(wh->i_addr2));
275 printf("->%s", ether_sprintf(wh->i_addr3));
276 printf("(%s)", ether_sprintf(wh->i_addr1));
278 case IEEE80211_FC1_DIR_FROMDS:
279 printf("FRDS %s", ether_sprintf(wh->i_addr3));
280 printf("->%s", ether_sprintf(wh->i_addr1));
281 printf("(%s)", ether_sprintf(wh->i_addr2));
283 case IEEE80211_FC1_DIR_DSTODS:
284 printf("DSDS %s", ether_sprintf((const u_int8_t *)&wh[1]));
285 printf("->%s", ether_sprintf(wh->i_addr3));
286 printf("(%s", ether_sprintf(wh->i_addr2));
287 printf("->%s)", ether_sprintf(wh->i_addr1));
290 switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) {
291 case IEEE80211_FC0_TYPE_DATA:
294 case IEEE80211_FC0_TYPE_MGT:
295 printf(" %s", ieee80211_mgt_subtype_name[
296 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK)
297 >> IEEE80211_FC0_SUBTYPE_SHIFT]);
300 printf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK);
303 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
306 for (i = 0; i < IEEE80211_WEP_IVLEN; i++)
307 printf(" %.02x", buf[sizeof(*wh)+i]);
308 printf(" KID %u]", buf[sizeof(*wh)+i] >> 6);
311 printf(" %dM", rate / 2);
313 printf(" +%d", rssi);
316 for (i = 0; i < len; i++) {
319 printf("%02x", buf[i]);
326 ieee80211_fix_rate(struct ieee80211_node *ni, int flags)
328 #define RV(v) ((v) & IEEE80211_RATE_VAL)
329 struct ieee80211com *ic = ni->ni_ic;
330 int i, j, ignore, error;
331 int okrate, badrate, fixedrate;
332 struct ieee80211_rateset *srs, *nrs;
336 * If the fixed rate check was requested but no
337 * fixed has been defined then just remove it.
339 if ((flags & IEEE80211_F_DOFRATE) &&
340 ic->ic_fixed_rate == IEEE80211_FIXED_RATE_NONE)
341 flags &= ~IEEE80211_F_DOFRATE;
343 okrate = badrate = fixedrate = 0;
344 srs = &ic->ic_sup_rates[ieee80211_chan2mode(ic, ni->ni_chan)];
346 for (i = 0; i < nrs->rs_nrates; ) {
348 if (flags & IEEE80211_F_DOSORT) {
352 for (j = i + 1; j < nrs->rs_nrates; j++) {
353 if (RV(nrs->rs_rates[i]) > RV(nrs->rs_rates[j])) {
354 r = nrs->rs_rates[i];
355 nrs->rs_rates[i] = nrs->rs_rates[j];
356 nrs->rs_rates[j] = r;
360 r = nrs->rs_rates[i] & IEEE80211_RATE_VAL;
362 if (flags & IEEE80211_F_DOFRATE) {
364 * Check any fixed rate is included.
366 if (r == RV(srs->rs_rates[ic->ic_fixed_rate]))
369 if (flags & IEEE80211_F_DONEGO) {
371 * Check against supported rates.
373 for (j = 0; j < srs->rs_nrates; j++) {
374 if (r == RV(srs->rs_rates[j])) {
376 * Overwrite with the supported rate
377 * value so any basic rate bit is set.
378 * This insures that response we send
379 * to stations have the necessary basic
382 nrs->rs_rates[i] = srs->rs_rates[j];
386 if (j == srs->rs_nrates) {
388 * A rate in the node's rate set is not
389 * supported. If this is a basic rate and we
390 * are operating as an AP then this is an error.
391 * Otherwise we just discard/ignore the rate.
392 * Note that this is important for 11b stations
393 * when they want to associate with an 11g AP.
395 if (ic->ic_opmode == IEEE80211_M_HOSTAP &&
396 (nrs->rs_rates[i] & IEEE80211_RATE_BASIC))
401 if (flags & IEEE80211_F_DODEL) {
403 * Delete unacceptable rates.
407 for (j = i; j < nrs->rs_nrates; j++)
408 nrs->rs_rates[j] = nrs->rs_rates[j + 1];
409 nrs->rs_rates[j] = 0;
414 okrate = nrs->rs_rates[i];
417 if (okrate == 0 || error != 0 ||
418 ((flags & IEEE80211_F_DOFRATE) && fixedrate == 0))
419 return badrate | IEEE80211_RATE_BASIC;
426 * Reset 11g-related state.
429 ieee80211_reset_erp(struct ieee80211com *ic)
431 ic->ic_flags &= ~IEEE80211_F_USEPROT;
432 ic->ic_nonerpsta = 0;
433 ic->ic_longslotsta = 0;
435 * Short slot time is enabled only when operating in 11g
436 * and not in an IBSS. We must also honor whether or not
437 * the driver is capable of doing it.
439 ieee80211_set_shortslottime(ic,
440 ic->ic_curmode == IEEE80211_MODE_11A ||
441 (ic->ic_curmode == IEEE80211_MODE_11G &&
442 ic->ic_opmode == IEEE80211_M_HOSTAP &&
443 (ic->ic_caps & IEEE80211_C_SHSLOT)));
445 * Set short preamble and ERP barker-preamble flags.
447 if (ic->ic_curmode == IEEE80211_MODE_11A ||
448 (ic->ic_caps & IEEE80211_C_SHPREAMBLE)) {
449 ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
450 ic->ic_flags &= ~IEEE80211_F_USEBARKER;
452 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
453 ic->ic_flags |= IEEE80211_F_USEBARKER;
458 * Set the short slot time state and notify the driver.
461 ieee80211_set_shortslottime(struct ieee80211com *ic, int onoff)
464 ic->ic_flags |= IEEE80211_F_SHSLOT;
466 ic->ic_flags &= ~IEEE80211_F_SHSLOT;
468 if (ic->ic_updateslot != NULL)
469 ic->ic_updateslot(ic->ic_ifp);
473 * Check if the specified rate set supports ERP.
474 * NB: the rate set is assumed to be sorted.
477 ieee80211_iserp_rateset(struct ieee80211com *ic, struct ieee80211_rateset *rs)
479 #define N(a) (sizeof(a) / sizeof(a[0]))
480 static const int rates[] = { 2, 4, 11, 22, 12, 24, 48 };
483 if (rs->rs_nrates < N(rates))
485 for (i = 0; i < N(rates); i++) {
486 for (j = 0; j < rs->rs_nrates; j++) {
487 int r = rs->rs_rates[j] & IEEE80211_RATE_VAL;
502 * Mark the basic rates for the 11g rate table based on the
503 * operating mode. For real 11g we mark all the 11b rates
504 * and 6, 12, and 24 OFDM. For 11b compatibility we mark only
505 * 11b rates. There's also a pseudo 11a-mode used to mark only
506 * the basic OFDM rates.
509 ieee80211_set11gbasicrates(struct ieee80211_rateset *rs, enum ieee80211_phymode mode)
511 static const struct ieee80211_rateset basic[] = {
512 { 0 }, /* IEEE80211_MODE_AUTO */
513 { 3, { 12, 24, 48 } }, /* IEEE80211_MODE_11A */
514 { 2, { 2, 4 } }, /* IEEE80211_MODE_11B */
515 { 4, { 2, 4, 11, 22 } }, /* IEEE80211_MODE_11G (mixed b/g) */
516 { 0 }, /* IEEE80211_MODE_FH */
517 /* IEEE80211_MODE_PUREG (not yet) */
518 { 7, { 2, 4, 11, 22, 12, 24, 48 } },
522 for (i = 0; i < rs->rs_nrates; i++) {
523 rs->rs_rates[i] &= IEEE80211_RATE_VAL;
524 for (j = 0; j < basic[mode].rs_nrates; j++)
525 if (basic[mode].rs_rates[j] == rs->rs_rates[i]) {
526 rs->rs_rates[i] |= IEEE80211_RATE_BASIC;
533 * WME protocol support. The following parameters come from the spec.
535 typedef struct phyParamType {
543 static const struct phyParamType phyParamForAC_BE[IEEE80211_MODE_MAX] = {
544 { 3, 4, 6 }, /* IEEE80211_MODE_AUTO */
545 { 3, 4, 6 }, /* IEEE80211_MODE_11A */
546 { 3, 5, 7 }, /* IEEE80211_MODE_11B */
547 { 3, 4, 6 }, /* IEEE80211_MODE_11G */
548 { 3, 5, 7 }, /* IEEE80211_MODE_FH */
549 { 2, 3, 5 }, /* IEEE80211_MODE_TURBO_A */
550 { 2, 3, 5 }, /* IEEE80211_MODE_TURBO_G */
552 static const struct phyParamType phyParamForAC_BK[IEEE80211_MODE_MAX] = {
553 { 7, 4, 10 }, /* IEEE80211_MODE_AUTO */
554 { 7, 4, 10 }, /* IEEE80211_MODE_11A */
555 { 7, 5, 10 }, /* IEEE80211_MODE_11B */
556 { 7, 4, 10 }, /* IEEE80211_MODE_11G */
557 { 7, 5, 10 }, /* IEEE80211_MODE_FH */
558 { 7, 3, 10 }, /* IEEE80211_MODE_TURBO_A */
559 { 7, 3, 10 }, /* IEEE80211_MODE_TURBO_G */
561 static const struct phyParamType phyParamForAC_VI[IEEE80211_MODE_MAX] = {
562 { 1, 3, 4, 94 }, /* IEEE80211_MODE_AUTO */
563 { 1, 3, 4, 94 }, /* IEEE80211_MODE_11A */
564 { 1, 4, 5, 188 }, /* IEEE80211_MODE_11B */
565 { 1, 3, 4, 94 }, /* IEEE80211_MODE_11G */
566 { 1, 4, 5, 188 }, /* IEEE80211_MODE_FH */
567 { 1, 2, 3, 94 }, /* IEEE80211_MODE_TURBO_A */
568 { 1, 2, 3, 94 }, /* IEEE80211_MODE_TURBO_G */
570 static const struct phyParamType phyParamForAC_VO[IEEE80211_MODE_MAX] = {
571 { 1, 2, 3, 47 }, /* IEEE80211_MODE_AUTO */
572 { 1, 2, 3, 47 }, /* IEEE80211_MODE_11A */
573 { 1, 3, 4, 102 }, /* IEEE80211_MODE_11B */
574 { 1, 2, 3, 47 }, /* IEEE80211_MODE_11G */
575 { 1, 3, 4, 102 }, /* IEEE80211_MODE_FH */
576 { 1, 2, 2, 47 }, /* IEEE80211_MODE_TURBO_A */
577 { 1, 2, 2, 47 }, /* IEEE80211_MODE_TURBO_G */
580 static const struct phyParamType bssPhyParamForAC_BE[IEEE80211_MODE_MAX] = {
581 { 3, 4, 10 }, /* IEEE80211_MODE_AUTO */
582 { 3, 4, 10 }, /* IEEE80211_MODE_11A */
583 { 3, 5, 10 }, /* IEEE80211_MODE_11B */
584 { 3, 4, 10 }, /* IEEE80211_MODE_11G */
585 { 3, 5, 10 }, /* IEEE80211_MODE_FH */
586 { 2, 3, 10 }, /* IEEE80211_MODE_TURBO_A */
587 { 2, 3, 10 }, /* IEEE80211_MODE_TURBO_G */
589 static const struct phyParamType bssPhyParamForAC_VI[IEEE80211_MODE_MAX] = {
590 { 2, 3, 4, 94 }, /* IEEE80211_MODE_AUTO */
591 { 2, 3, 4, 94 }, /* IEEE80211_MODE_11A */
592 { 2, 4, 5, 188 }, /* IEEE80211_MODE_11B */
593 { 2, 3, 4, 94 }, /* IEEE80211_MODE_11G */
594 { 2, 4, 5, 188 }, /* IEEE80211_MODE_FH */
595 { 2, 2, 3, 94 }, /* IEEE80211_MODE_TURBO_A */
596 { 2, 2, 3, 94 }, /* IEEE80211_MODE_TURBO_G */
598 static const struct phyParamType bssPhyParamForAC_VO[IEEE80211_MODE_MAX] = {
599 { 2, 2, 3, 47 }, /* IEEE80211_MODE_AUTO */
600 { 2, 2, 3, 47 }, /* IEEE80211_MODE_11A */
601 { 2, 3, 4, 102 }, /* IEEE80211_MODE_11B */
602 { 2, 2, 3, 47 }, /* IEEE80211_MODE_11G */
603 { 2, 3, 4, 102 }, /* IEEE80211_MODE_FH */
604 { 1, 2, 2, 47 }, /* IEEE80211_MODE_TURBO_A */
605 { 1, 2, 2, 47 }, /* IEEE80211_MODE_TURBO_G */
609 ieee80211_wme_initparams(struct ieee80211com *ic)
611 struct ieee80211_wme_state *wme = &ic->ic_wme;
612 const paramType *pPhyParam, *pBssPhyParam;
613 struct wmeParams *wmep;
616 if ((ic->ic_caps & IEEE80211_C_WME) == 0)
619 for (i = 0; i < WME_NUM_AC; i++) {
622 pPhyParam = &phyParamForAC_BK[ic->ic_curmode];
623 pBssPhyParam = &phyParamForAC_BK[ic->ic_curmode];
626 pPhyParam = &phyParamForAC_VI[ic->ic_curmode];
627 pBssPhyParam = &bssPhyParamForAC_VI[ic->ic_curmode];
630 pPhyParam = &phyParamForAC_VO[ic->ic_curmode];
631 pBssPhyParam = &bssPhyParamForAC_VO[ic->ic_curmode];
635 pPhyParam = &phyParamForAC_BE[ic->ic_curmode];
636 pBssPhyParam = &bssPhyParamForAC_BE[ic->ic_curmode];
640 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i];
641 if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
642 wmep->wmep_acm = pPhyParam->acm;
643 wmep->wmep_aifsn = pPhyParam->aifsn;
644 wmep->wmep_logcwmin = pPhyParam->logcwmin;
645 wmep->wmep_logcwmax = pPhyParam->logcwmax;
646 wmep->wmep_txopLimit = pPhyParam->txopLimit;
648 wmep->wmep_acm = pBssPhyParam->acm;
649 wmep->wmep_aifsn = pBssPhyParam->aifsn;
650 wmep->wmep_logcwmin = pBssPhyParam->logcwmin;
651 wmep->wmep_logcwmax = pBssPhyParam->logcwmax;
652 wmep->wmep_txopLimit = pBssPhyParam->txopLimit;
655 IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
656 "%s: %s chan [acm %u aifsn %u log2(cwmin) %u "
657 "log2(cwmax) %u txpoLimit %u]\n", __func__
658 , ieee80211_wme_acnames[i]
661 , wmep->wmep_logcwmin
662 , wmep->wmep_logcwmax
663 , wmep->wmep_txopLimit
666 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i];
667 wmep->wmep_acm = pBssPhyParam->acm;
668 wmep->wmep_aifsn = pBssPhyParam->aifsn;
669 wmep->wmep_logcwmin = pBssPhyParam->logcwmin;
670 wmep->wmep_logcwmax = pBssPhyParam->logcwmax;
671 wmep->wmep_txopLimit = pBssPhyParam->txopLimit;
672 IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
673 "%s: %s bss [acm %u aifsn %u log2(cwmin) %u "
674 "log2(cwmax) %u txpoLimit %u]\n", __func__
675 , ieee80211_wme_acnames[i]
678 , wmep->wmep_logcwmin
679 , wmep->wmep_logcwmax
680 , wmep->wmep_txopLimit
683 /* NB: check ic_bss to avoid NULL deref on initial attach */
684 if (ic->ic_bss != NULL) {
686 * Calculate agressive mode switching threshold based
687 * on beacon interval. This doesn't need locking since
688 * we're only called before entering the RUN state at
689 * which point we start sending beacon frames.
691 wme->wme_hipri_switch_thresh =
692 (HIGH_PRI_SWITCH_THRESH * ic->ic_bss->ni_intval) / 100;
693 ieee80211_wme_updateparams(ic);
698 * Update WME parameters for ourself and the BSS.
701 ieee80211_wme_updateparams_locked(struct ieee80211com *ic)
703 static const paramType phyParam[IEEE80211_MODE_MAX] = {
704 { 2, 4, 10, 64 }, /* IEEE80211_MODE_AUTO */
705 { 2, 4, 10, 64 }, /* IEEE80211_MODE_11A */
706 { 2, 5, 10, 64 }, /* IEEE80211_MODE_11B */
707 { 2, 4, 10, 64 }, /* IEEE80211_MODE_11G */
708 { 2, 5, 10, 64 }, /* IEEE80211_MODE_FH */
709 { 1, 3, 10, 64 }, /* IEEE80211_MODE_TURBO_A */
710 { 1, 3, 10, 64 }, /* IEEE80211_MODE_TURBO_G */
712 struct ieee80211_wme_state *wme = &ic->ic_wme;
713 const struct wmeParams *wmep;
714 struct wmeParams *chanp, *bssp;
717 /* set up the channel access parameters for the physical device */
718 for (i = 0; i < WME_NUM_AC; i++) {
719 chanp = &wme->wme_chanParams.cap_wmeParams[i];
720 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i];
721 chanp->wmep_aifsn = wmep->wmep_aifsn;
722 chanp->wmep_logcwmin = wmep->wmep_logcwmin;
723 chanp->wmep_logcwmax = wmep->wmep_logcwmax;
724 chanp->wmep_txopLimit = wmep->wmep_txopLimit;
726 chanp = &wme->wme_bssChanParams.cap_wmeParams[i];
727 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i];
728 chanp->wmep_aifsn = wmep->wmep_aifsn;
729 chanp->wmep_logcwmin = wmep->wmep_logcwmin;
730 chanp->wmep_logcwmax = wmep->wmep_logcwmax;
731 chanp->wmep_txopLimit = wmep->wmep_txopLimit;
735 * This implements agressive mode as found in certain
736 * vendors' AP's. When there is significant high
737 * priority (VI/VO) traffic in the BSS throttle back BE
738 * traffic by using conservative parameters. Otherwise
739 * BE uses agressive params to optimize performance of
740 * legacy/non-QoS traffic.
742 if ((ic->ic_opmode == IEEE80211_M_HOSTAP &&
743 (wme->wme_flags & WME_F_AGGRMODE) != 0) ||
744 (ic->ic_opmode == IEEE80211_M_STA &&
745 (ic->ic_bss->ni_flags & IEEE80211_NODE_QOS) == 0) ||
746 (ic->ic_flags & IEEE80211_F_WME) == 0) {
747 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE];
748 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE];
750 chanp->wmep_aifsn = bssp->wmep_aifsn =
751 phyParam[ic->ic_curmode].aifsn;
752 chanp->wmep_logcwmin = bssp->wmep_logcwmin =
753 phyParam[ic->ic_curmode].logcwmin;
754 chanp->wmep_logcwmax = bssp->wmep_logcwmax =
755 phyParam[ic->ic_curmode].logcwmax;
756 chanp->wmep_txopLimit = bssp->wmep_txopLimit =
757 (ic->ic_flags & IEEE80211_F_BURST) ?
758 phyParam[ic->ic_curmode].txopLimit : 0;
759 IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
760 "%s: %s [acm %u aifsn %u log2(cwmin) %u "
761 "log2(cwmax) %u txpoLimit %u]\n", __func__
762 , ieee80211_wme_acnames[WME_AC_BE]
765 , chanp->wmep_logcwmin
766 , chanp->wmep_logcwmax
767 , chanp->wmep_txopLimit
771 if (ic->ic_opmode == IEEE80211_M_HOSTAP &&
772 ic->ic_sta_assoc < 2 && (wme->wme_flags & WME_F_AGGRMODE) != 0) {
773 static const u_int8_t logCwMin[IEEE80211_MODE_MAX] = {
774 3, /* IEEE80211_MODE_AUTO */
775 3, /* IEEE80211_MODE_11A */
776 4, /* IEEE80211_MODE_11B */
777 3, /* IEEE80211_MODE_11G */
778 4, /* IEEE80211_MODE_FH */
779 3, /* IEEE80211_MODE_TURBO_A */
780 3, /* IEEE80211_MODE_TURBO_G */
782 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE];
783 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE];
785 chanp->wmep_logcwmin = bssp->wmep_logcwmin =
786 logCwMin[ic->ic_curmode];
787 IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
788 "%s: %s log2(cwmin) %u\n", __func__
789 , ieee80211_wme_acnames[WME_AC_BE]
790 , chanp->wmep_logcwmin
793 if (ic->ic_opmode == IEEE80211_M_HOSTAP) { /* XXX ibss? */
795 * Arrange for a beacon update and bump the parameter
796 * set number so associated stations load the new values.
798 wme->wme_bssChanParams.cap_info =
799 (wme->wme_bssChanParams.cap_info+1) & WME_QOSINFO_COUNT;
800 ic->ic_flags |= IEEE80211_F_WMEUPDATE;
805 IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
806 "%s: WME params updated, cap_info 0x%x\n", __func__,
807 ic->ic_opmode == IEEE80211_M_STA ?
808 wme->wme_wmeChanParams.cap_info :
809 wme->wme_bssChanParams.cap_info);
813 ieee80211_wme_updateparams(struct ieee80211com *ic)
816 if (ic->ic_caps & IEEE80211_C_WME) {
817 IEEE80211_BEACON_LOCK(ic);
818 ieee80211_wme_updateparams_locked(ic);
819 IEEE80211_BEACON_UNLOCK(ic);
824 ieee80211_beacon_miss(struct ieee80211com *ic)
827 if (ic->ic_flags & IEEE80211_F_SCAN) {
828 /* XXX check ic_curchan != ic_bsschan? */
831 IEEE80211_DPRINTF(ic,
832 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
833 "%s\n", "beacon miss");
836 * Our handling is only meaningful for stations that are
837 * associated; any other conditions else will be handled
838 * through different means (e.g. the tx timeout on mgt frames).
840 if (ic->ic_opmode != IEEE80211_M_STA || ic->ic_state != IEEE80211_S_RUN)
843 if (++ic->ic_bmiss_count < ic->ic_bmiss_max) {
845 * Send a directed probe req before falling back to a scan;
846 * if we receive a response ic_bmiss_count will be reset.
847 * Some cards mistakenly report beacon miss so this avoids
848 * the expensive scan if the ap is still there.
850 ieee80211_send_probereq(ic->ic_bss, ic->ic_myaddr,
851 ic->ic_bss->ni_bssid, ic->ic_bss->ni_bssid,
852 ic->ic_bss->ni_essid, ic->ic_bss->ni_esslen,
853 ic->ic_opt_ie, ic->ic_opt_ie_len);
856 ic->ic_bmiss_count = 0;
857 ieee80211_new_state(ic, IEEE80211_S_SCAN, 0);
861 * Software beacon miss handling. Check if any beacons
862 * were received in the last period. If not post a
863 * beacon miss; otherwise reset the counter.
866 ieee80211_swbmiss(void *arg)
868 struct ieee80211com *ic = arg;
870 if (ic->ic_swbmiss_count == 0) {
871 ieee80211_beacon_miss(ic);
872 if (ic->ic_bmiss_count == 0) /* don't re-arm timer */
875 ic->ic_swbmiss_count = 0;
876 callout_reset(&ic->ic_swbmiss, ic->ic_swbmiss_period,
877 ieee80211_swbmiss, ic);
881 sta_disassoc(void *arg, struct ieee80211_node *ni)
883 struct ieee80211com *ic = arg;
885 if (ni->ni_associd != 0) {
886 IEEE80211_SEND_MGMT(ic, ni, IEEE80211_FC0_SUBTYPE_DISASSOC,
887 IEEE80211_REASON_ASSOC_LEAVE);
888 ieee80211_node_leave(ic, ni);
893 sta_deauth(void *arg, struct ieee80211_node *ni)
895 struct ieee80211com *ic = arg;
897 IEEE80211_SEND_MGMT(ic, ni, IEEE80211_FC0_SUBTYPE_DEAUTH,
898 IEEE80211_REASON_ASSOC_LEAVE);
902 ieee80211_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg)
904 struct ifnet *ifp = ic->ic_ifp;
905 struct ieee80211_node *ni;
906 enum ieee80211_state ostate;
908 ostate = ic->ic_state;
909 IEEE80211_DPRINTF(ic, IEEE80211_MSG_STATE, "%s: %s -> %s\n", __func__,
910 ieee80211_state_name[ostate], ieee80211_state_name[nstate]);
911 ic->ic_state = nstate; /* state transition */
912 ni = ic->ic_bss; /* NB: no reference held */
913 if (ic->ic_flags_ext & IEEE80211_FEXT_SWBMISS)
914 callout_stop(&ic->ic_swbmiss);
916 case IEEE80211_S_INIT:
918 case IEEE80211_S_INIT:
920 case IEEE80211_S_RUN:
921 switch (ic->ic_opmode) {
922 case IEEE80211_M_STA:
923 IEEE80211_SEND_MGMT(ic, ni,
924 IEEE80211_FC0_SUBTYPE_DISASSOC,
925 IEEE80211_REASON_ASSOC_LEAVE);
926 ieee80211_sta_leave(ic, ni);
928 case IEEE80211_M_HOSTAP:
929 ieee80211_iterate_nodes(&ic->ic_sta,
936 case IEEE80211_S_ASSOC:
937 switch (ic->ic_opmode) {
938 case IEEE80211_M_STA:
939 IEEE80211_SEND_MGMT(ic, ni,
940 IEEE80211_FC0_SUBTYPE_DEAUTH,
941 IEEE80211_REASON_AUTH_LEAVE);
943 case IEEE80211_M_HOSTAP:
944 ieee80211_iterate_nodes(&ic->ic_sta,
951 case IEEE80211_S_SCAN:
952 ieee80211_cancel_scan(ic);
954 case IEEE80211_S_AUTH:
956 ic->ic_mgt_timer = 0;
957 IF_DRAIN(&ic->ic_mgtq);
958 ieee80211_reset_bss(ic);
961 if (ic->ic_auth->ia_detach != NULL)
962 ic->ic_auth->ia_detach(ic);
964 case IEEE80211_S_SCAN:
966 case IEEE80211_S_INIT:
967 if ((ic->ic_opmode == IEEE80211_M_HOSTAP ||
968 ic->ic_opmode == IEEE80211_M_IBSS ||
969 ic->ic_opmode == IEEE80211_M_AHDEMO) &&
970 ic->ic_des_chan != IEEE80211_CHAN_ANYC) {
972 * AP operation and we already have a channel;
973 * bypass the scan and startup immediately.
975 ieee80211_create_ibss(ic, ic->ic_des_chan);
977 ieee80211_begin_scan(ic, arg);
980 case IEEE80211_S_SCAN:
982 * Scan next. If doing an active scan probe
983 * for the requested ap (if any).
985 if (ic->ic_flags & IEEE80211_F_ASCAN)
986 ieee80211_probe_curchan(ic, 0);
988 case IEEE80211_S_RUN:
990 IEEE80211_DPRINTF(ic, IEEE80211_MSG_STATE,
991 "no recent beacons from %s; rescanning\n",
992 ether_sprintf(ic->ic_bss->ni_bssid));
993 ieee80211_sta_leave(ic, ni);
994 ic->ic_flags &= ~IEEE80211_F_SIBSS; /* XXX */
996 case IEEE80211_S_AUTH:
997 case IEEE80211_S_ASSOC:
998 /* timeout restart scan */
999 ni = ieee80211_find_node(&ic->ic_scan,
1000 ic->ic_bss->ni_macaddr);
1003 ieee80211_unref_node(&ni);
1005 if (ic->ic_roaming == IEEE80211_ROAMING_AUTO)
1006 ieee80211_begin_scan(ic, arg);
1010 case IEEE80211_S_AUTH:
1012 case IEEE80211_S_INIT:
1013 case IEEE80211_S_SCAN:
1014 IEEE80211_SEND_MGMT(ic, ni,
1015 IEEE80211_FC0_SUBTYPE_AUTH, 1);
1017 case IEEE80211_S_AUTH:
1018 case IEEE80211_S_ASSOC:
1020 case IEEE80211_FC0_SUBTYPE_AUTH:
1022 IEEE80211_SEND_MGMT(ic, ni,
1023 IEEE80211_FC0_SUBTYPE_AUTH, 2);
1025 case IEEE80211_FC0_SUBTYPE_DEAUTH:
1026 /* ignore and retry scan on timeout */
1030 case IEEE80211_S_RUN:
1032 case IEEE80211_FC0_SUBTYPE_AUTH:
1033 IEEE80211_SEND_MGMT(ic, ni,
1034 IEEE80211_FC0_SUBTYPE_AUTH, 2);
1035 ic->ic_state = ostate; /* stay RUN */
1037 case IEEE80211_FC0_SUBTYPE_DEAUTH:
1038 ieee80211_sta_leave(ic, ni);
1039 if (ic->ic_roaming == IEEE80211_ROAMING_AUTO) {
1041 IEEE80211_SEND_MGMT(ic, ni,
1042 IEEE80211_FC0_SUBTYPE_AUTH, 1);
1049 case IEEE80211_S_ASSOC:
1051 case IEEE80211_S_INIT:
1052 case IEEE80211_S_SCAN:
1053 case IEEE80211_S_ASSOC:
1054 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY,
1055 "%s: invalid transition\n", __func__);
1057 case IEEE80211_S_AUTH:
1058 IEEE80211_SEND_MGMT(ic, ni,
1059 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0);
1061 case IEEE80211_S_RUN:
1062 ieee80211_sta_leave(ic, ni);
1063 if (ic->ic_roaming == IEEE80211_ROAMING_AUTO) {
1064 IEEE80211_SEND_MGMT(ic, ni,
1065 IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 1);
1070 case IEEE80211_S_RUN:
1071 if (ic->ic_flags & IEEE80211_F_WPA) {
1072 /* XXX validate prerequisites */
1075 case IEEE80211_S_INIT:
1076 if (ic->ic_opmode == IEEE80211_M_MONITOR)
1079 case IEEE80211_S_AUTH:
1080 IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY,
1081 "%s: invalid transition\n", __func__);
1083 case IEEE80211_S_RUN:
1085 case IEEE80211_S_SCAN: /* adhoc/hostap mode */
1086 case IEEE80211_S_ASSOC: /* infra mode */
1087 KASSERT(ni->ni_txrate < ni->ni_rates.rs_nrates,
1088 ("%s: bogus xmit rate %u setup\n", __func__,
1090 #ifdef IEEE80211_DEBUG
1091 if (ieee80211_msg_debug(ic)) {
1092 if (ic->ic_opmode == IEEE80211_M_STA)
1093 if_printf(ifp, "associated ");
1095 if_printf(ifp, "synchronized ");
1096 printf("with %s ssid ",
1097 ether_sprintf(ni->ni_bssid));
1098 ieee80211_print_essid(ic->ic_bss->ni_essid,
1100 printf(" channel %d start %uMb\n",
1101 ieee80211_chan2ieee(ic, ic->ic_curchan),
1102 IEEE80211_RATE2MBS(ni->ni_rates.rs_rates[ni->ni_txrate]));
1105 ic->ic_mgt_timer = 0;
1106 if (ic->ic_opmode == IEEE80211_M_STA)
1107 ieee80211_notify_node_join(ic, ni,
1108 arg == IEEE80211_FC0_SUBTYPE_ASSOC_RESP);
1109 if_start(ifp); /* XXX not authorized yet */
1112 if (ostate != IEEE80211_S_RUN &&
1113 ic->ic_opmode == IEEE80211_M_STA &&
1114 (ic->ic_flags_ext & IEEE80211_FEXT_SWBMISS)) {
1116 * Start s/w beacon miss timer for devices w/o
1117 * hardware support. We fudge a bit here since
1118 * we're doing this in software.
1120 ic->ic_swbmiss_period = IEEE80211_TU_TO_TICKS(
1121 2 * ic->ic_bmissthreshold * ni->ni_intval);
1122 ic->ic_swbmiss_count = 0;
1123 callout_reset(&ic->ic_swbmiss, ic->ic_swbmiss_period,
1124 ieee80211_swbmiss, ic);
1127 * Start/stop the authenticator when operating as an
1128 * AP. We delay until here to allow configuration to
1129 * happen out of order.
1131 if (ic->ic_opmode == IEEE80211_M_HOSTAP && /* XXX IBSS/AHDEMO */
1132 ic->ic_auth->ia_attach != NULL) {
1133 /* XXX check failure */
1134 ic->ic_auth->ia_attach(ic);
1135 } else if (ic->ic_auth->ia_detach != NULL) {
1136 ic->ic_auth->ia_detach(ic);
1139 * When 802.1x is not in use mark the port authorized
1140 * at this point so traffic can flow.
1142 if (ni->ni_authmode != IEEE80211_AUTH_8021X)
1143 ieee80211_node_authorize(ni);
1145 * Enable inactivity processing.
1148 ic->ic_scan.nt_inact_timer = IEEE80211_INACT_WAIT;
1149 ic->ic_sta.nt_inact_timer = IEEE80211_INACT_WAIT;