sys/netproto/802_11/wlan/ieee80211_proto.c

   1 /*
   2  * Copyright (c) 2001 Atsushi Onoe
   3  * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   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.
  16  *
  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.
  20  *
  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.
  31  *
  32  * $FreeBSD: src/sys/net80211/ieee80211_proto.c,v 1.17.2.9 2006/03/13 03:10:31 sam Exp $
  33  * $DragonFly: src/sys/netproto/802_11/wlan/ieee80211_proto.c,v 1.2 2006/05/18 13:51:46 sephe Exp $
  34  */
  35
  36 /*
  37  * IEEE 802.11 protocol support.
  38  */
  39
  40 #include "opt_inet.h"
  41
  42 #include <sys/param.h>
  43 #include <sys/kernel.h>
  44 #include <sys/systm.h>
  45 #include <sys/serialize.h>
  46
  47 #include <sys/socket.h>
  48
  49 #include <net/if.h>
  50 #include <net/if_arp.h>
  51 #include <net/if_media.h>
  52 #include <net/ethernet.h>               /* XXX for ether_sprintf */
  53
  54 #include <netproto/802_11/ieee80211_var.h>
  55
  56 /* XXX tunables */
  57 #define AGGRESSIVE_MODE_SWITCH_HYSTERESIS       3       /* pkts / 100ms */
  58 #define HIGH_PRI_SWITCH_THRESH                  10      /* pkts / 100ms */
  59
  60 #define IEEE80211_RATE2MBS(r)   (((r) & IEEE80211_RATE_VAL) / 2)
  61
  62 const char *ieee80211_mgt_subtype_name[] = {
  63         "assoc_req",    "assoc_resp",   "reassoc_req",  "reassoc_resp",
  64         "probe_req",    "probe_resp",   "reserved#6",   "reserved#7",
  65         "beacon",       "atim",         "disassoc",     "auth",
  66         "deauth",       "reserved#13",  "reserved#14",  "reserved#15"
  67 };
  68 const char *ieee80211_ctl_subtype_name[] = {
  69         "reserved#0",   "reserved#1",   "reserved#2",   "reserved#3",
  70         "reserved#3",   "reserved#5",   "reserved#6",   "reserved#7",
  71         "reserved#8",   "reserved#9",   "ps_poll",      "rts",
  72         "cts",          "ack",          "cf_end",       "cf_end_ack"
  73 };
  74 const char *ieee80211_state_name[IEEE80211_S_MAX] = {
  75         "INIT",         /* IEEE80211_S_INIT */
  76         "SCAN",         /* IEEE80211_S_SCAN */
  77         "AUTH",         /* IEEE80211_S_AUTH */
  78         "ASSOC",        /* IEEE80211_S_ASSOC */
  79         "RUN"           /* IEEE80211_S_RUN */
  80 };
  81 const char *ieee80211_wme_acnames[] = {
  82         "WME_AC_BE",
  83         "WME_AC_BK",
  84         "WME_AC_VI",
  85         "WME_AC_VO",
  86         "WME_UPSD",
  87 };
  88
  89 static int ieee80211_newstate(struct ieee80211com *, enum ieee80211_state, int);
  90
  91 void
  92 ieee80211_proto_attach(struct ieee80211com *ic)
  93 {
  94         struct ifnet *ifp = ic->ic_ifp;
  95
  96         /* XXX room for crypto  */
  97         ifp->if_hdrlen = sizeof(struct ieee80211_qosframe_addr4);
  98
  99         ic->ic_rtsthreshold = IEEE80211_RTS_DEFAULT;
 100         ic->ic_fragthreshold = IEEE80211_FRAG_DEFAULT;
 101         ic->ic_fixed_rate = IEEE80211_FIXED_RATE_NONE;
 102         ic->ic_bmiss_max = IEEE80211_BMISS_MAX;
 103         callout_init(&ic->ic_swbmiss);
 104         ic->ic_mcast_rate = IEEE80211_MCAST_RATE_DEFAULT;
 105         ic->ic_protmode = IEEE80211_PROT_CTSONLY;
 106         ic->ic_roaming = IEEE80211_ROAMING_AUTO;
 107
 108         ic->ic_wme.wme_hipri_switch_hysteresis =
 109                 AGGRESSIVE_MODE_SWITCH_HYSTERESIS;
 110
 111         /* protocol state change handler */
 112         ic->ic_newstate = ieee80211_newstate;
 113
 114         /* initialize management frame handlers */
 115         ic->ic_recv_mgmt = ieee80211_recv_mgmt;
 116         ic->ic_send_mgmt = ieee80211_send_mgmt;
 117 }
 118
 119 void
 120 ieee80211_proto_detach(struct ieee80211com *ic)
 121 {
 122
 123         /*
 124          * This should not be needed as we detach when reseting
 125          * the state but be conservative here since the
 126          * authenticator may do things like spawn kernel threads.
 127          */
 128         if (ic->ic_auth->ia_detach)
 129                 ic->ic_auth->ia_detach(ic);
 130
 131         IF_DRAIN(&ic->ic_mgtq);
 132
 133         /*
 134          * Detach any ACL'ator.
 135          */
 136         if (ic->ic_acl != NULL)
 137                 ic->ic_acl->iac_detach(ic);
 138 }
 139
 140 /*
 141  * Simple-minded authenticator module support.
 142  */
 143
 144 #define IEEE80211_AUTH_MAX      (IEEE80211_AUTH_WPA+1)
 145 /* XXX well-known names */
 146 static const char *auth_modnames[IEEE80211_AUTH_MAX] = {
 147         "wlan_internal",        /* IEEE80211_AUTH_NONE */
 148         "wlan_internal",        /* IEEE80211_AUTH_OPEN */
 149         "wlan_internal",        /* IEEE80211_AUTH_SHARED */
 150         "wlan_xauth",           /* IEEE80211_AUTH_8021X  */
 151         "wlan_internal",        /* IEEE80211_AUTH_AUTO */
 152         "wlan_xauth",           /* IEEE80211_AUTH_WPA */
 153 };
 154 static const struct ieee80211_authenticator *authenticators[IEEE80211_AUTH_MAX];
 155
 156 static const struct ieee80211_authenticator auth_internal = {
 157         .ia_name                = "wlan_internal",
 158         .ia_attach              = NULL,
 159         .ia_detach              = NULL,
 160         .ia_node_join           = NULL,
 161         .ia_node_leave          = NULL,
 162 };
 163
 164 /*
 165  * Setup internal authenticators once; they are never unregistered.
 166  */
 167 static void
 168 ieee80211_auth_setup(void)
 169 {
 170         ieee80211_authenticator_register(IEEE80211_AUTH_OPEN, &auth_internal);
 171         ieee80211_authenticator_register(IEEE80211_AUTH_SHARED, &auth_internal);
 172         ieee80211_authenticator_register(IEEE80211_AUTH_AUTO, &auth_internal);
 173 }
 174 SYSINIT(wlan_auth, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_auth_setup, NULL);
 175
 176 const struct ieee80211_authenticator *
 177 ieee80211_authenticator_get(int auth)
 178 {
 179         if (auth >= IEEE80211_AUTH_MAX)
 180                 return NULL;
 181         if (authenticators[auth] == NULL)
 182                 ieee80211_load_module(auth_modnames[auth]);
 183         return authenticators[auth];
 184 }
 185
 186 void
 187 ieee80211_authenticator_register(int type,
 188         const struct ieee80211_authenticator *auth)
 189 {
 190         if (type >= IEEE80211_AUTH_MAX)
 191                 return;
 192         authenticators[type] = auth;
 193 }
 194
 195 void
 196 ieee80211_authenticator_unregister(int type)
 197 {
 198
 199         if (type >= IEEE80211_AUTH_MAX)
 200                 return;
 201         authenticators[type] = NULL;
 202 }
 203
 204 /*
 205  * Very simple-minded ACL module support.
 206  */
 207 /* XXX just one for now */
 208 static  const struct ieee80211_aclator *acl = NULL;
 209
 210 void
 211 ieee80211_aclator_register(const struct ieee80211_aclator *iac)
 212 {
 213         printf("wlan: %s acl policy registered\n", iac->iac_name);
 214         acl = iac;
 215 }
 216
 217 void
 218 ieee80211_aclator_unregister(const struct ieee80211_aclator *iac)
 219 {
 220         if (acl == iac)
 221                 acl = NULL;
 222         printf("wlan: %s acl policy unregistered\n", iac->iac_name);
 223 }
 224
 225 const struct ieee80211_aclator *
 226 ieee80211_aclator_get(const char *name)
 227 {
 228         if (acl == NULL)
 229                 ieee80211_load_module("wlan_acl");
 230         return acl != NULL && strcmp(acl->iac_name, name) == 0 ? acl : NULL;
 231 }
 232
 233 void
 234 ieee80211_print_essid(const uint8_t *essid, int len)
 235 {
 236         const uint8_t *p;
 237         int i;
 238
 239         if (len > IEEE80211_NWID_LEN)
 240                 len = IEEE80211_NWID_LEN;
 241         /* determine printable or not */
 242         for (i = 0, p = essid; i < len; i++, p++) {
 243                 if (*p < ' ' || *p > 0x7e)
 244                         break;
 245         }
 246         if (i == len) {
 247                 printf("\"");
 248                 for (i = 0, p = essid; i < len; i++, p++)
 249                         printf("%c", *p);
 250                 printf("\"");
 251         } else {
 252                 printf("0x");
 253                 for (i = 0, p = essid; i < len; i++, p++)
 254                         printf("%02x", *p);
 255         }
 256 }
 257
 258 void
 259 ieee80211_dump_pkt(const uint8_t *buf, int len, int rate, int rssi)
 260 {
 261         const struct ieee80211_frame *wh;
 262         int i;
 263
 264         wh = (const struct ieee80211_frame *)buf;
 265         switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) {
 266         case IEEE80211_FC1_DIR_NODS:
 267                 printf("NODS %6D", wh->i_addr2, ":");
 268                 printf("->%6D", wh->i_addr1, ":");
 269                 printf("(%6D)", wh->i_addr3, ":");
 270                 break;
 271         case IEEE80211_FC1_DIR_TODS:
 272                 printf("TODS %6D", wh->i_addr2, ":");
 273                 printf("->%6D", wh->i_addr3, ":");
 274                 printf("(%6D)", wh->i_addr1, ":");
 275                 break;
 276         case IEEE80211_FC1_DIR_FROMDS:
 277                 printf("FRDS %6D", wh->i_addr3, ":");
 278                 printf("->%6D", wh->i_addr1, ":");
 279                 printf("(%6D)", wh->i_addr2, ":");
 280                 break;
 281         case IEEE80211_FC1_DIR_DSTODS:
 282                 printf("DSDS %6D", (const uint8_t *)&wh[1], ":");
 283                 printf("->%6D", wh->i_addr3, ":");
 284                 printf("(%6D", wh->i_addr2, ":");
 285                 printf("->%6D)", wh->i_addr1, ":");
 286                 break;
 287         }
 288         switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) {
 289         case IEEE80211_FC0_TYPE_DATA:
 290                 printf(" data");
 291                 break;
 292         case IEEE80211_FC0_TYPE_MGT:
 293                 printf(" %s", ieee80211_mgt_subtype_name[
 294                     (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK)
 295                     >> IEEE80211_FC0_SUBTYPE_SHIFT]);
 296                 break;
 297         default:
 298                 printf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK);
 299                 break;
 300         }
 301         if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
 302                 int i;
 303                 printf(" WEP [IV");
 304                 for (i = 0; i < IEEE80211_WEP_IVLEN; i++)
 305                         printf(" %.02x", buf[sizeof(*wh)+i]);
 306                 printf(" KID %u]", buf[sizeof(*wh)+i] >> 6);
 307         }
 308         if (rate >= 0)
 309                 printf(" %dM", rate / 2);
 310         if (rssi >= 0)
 311                 printf(" +%d", rssi);
 312         printf("\n");
 313         if (len > 0) {
 314                 for (i = 0; i < len; i++) {
 315                         if ((i & 1) == 0)
 316                                 printf(" ");
 317                         printf("%02x", buf[i]);
 318                 }
 319                 printf("\n");
 320         }
 321 }
 322
 323 int
 324 ieee80211_fix_rate(struct ieee80211_node *ni, int flags)
 325 {
 326 #define RV(v)   ((v) & IEEE80211_RATE_VAL)
 327         struct ieee80211com *ic = ni->ni_ic;
 328         int i, j, ignore, error;
 329         int okrate, badrate, fixedrate;
 330         struct ieee80211_rateset *srs, *nrs;
 331         uint8_t r;
 332
 333         /*
 334          * If the fixed rate check was requested but no
 335          * fixed has been defined then just remove it.
 336          */
 337         if ((flags & IEEE80211_F_DOFRATE) &&
 338             ic->ic_fixed_rate == IEEE80211_FIXED_RATE_NONE)
 339                 flags &= ~IEEE80211_F_DOFRATE;
 340         error = 0;
 341         okrate = badrate = fixedrate = 0;
 342         srs = &ic->ic_sup_rates[ieee80211_chan2mode(ic, ni->ni_chan)];
 343         nrs = &ni->ni_rates;
 344         for (i = 0; i < nrs->rs_nrates; ) {
 345                 ignore = 0;
 346                 if (flags & IEEE80211_F_DOSORT) {
 347                         /*
 348                          * Sort rates.
 349                          */
 350                         for (j = i + 1; j < nrs->rs_nrates; j++) {
 351                                 if (RV(nrs->rs_rates[i]) > RV(nrs->rs_rates[j])) {
 352                                         r = nrs->rs_rates[i];
 353                                         nrs->rs_rates[i] = nrs->rs_rates[j];
 354                                         nrs->rs_rates[j] = r;
 355                                 }
 356                         }
 357                 }
 358                 r = nrs->rs_rates[i] & IEEE80211_RATE_VAL;
 359                 badrate = r;
 360                 if (flags & IEEE80211_F_DOFRATE) {
 361                         /*
 362                          * Check any fixed rate is included.
 363                          */
 364                         if (r == RV(srs->rs_rates[ic->ic_fixed_rate]))
 365                                 fixedrate = r;
 366                 }
 367                 if (flags & IEEE80211_F_DONEGO) {
 368                         /*
 369                          * Check against supported rates.
 370                          */
 371                         for (j = 0; j < srs->rs_nrates; j++) {
 372                                 if (r == RV(srs->rs_rates[j])) {
 373                                         /*
 374                                          * Overwrite with the supported rate
 375                                          * value so any basic rate bit is set.
 376                                          * This insures that response we send
 377                                          * to stations have the necessary basic
 378                                          * rate bit set.
 379                                          */
 380                                         nrs->rs_rates[i] = srs->rs_rates[j];
 381                                         break;
 382                                 }
 383                         }
 384                         if (j == srs->rs_nrates) {
 385                                 /*
 386                                  * A rate in the node's rate set is not
 387                                  * supported.  If this is a basic rate and we
 388                                  * are operating as an AP then this is an error.
 389                                  * Otherwise we just discard/ignore the rate.
 390                                  * Note that this is important for 11b stations
 391                                  * when they want to associate with an 11g AP.
 392                                  */
 393                                 if (ic->ic_opmode == IEEE80211_M_HOSTAP &&
 394                                     (nrs->rs_rates[i] & IEEE80211_RATE_BASIC))
 395                                         error++;
 396                                 ignore++;
 397                         }
 398                 }
 399                 if (flags & IEEE80211_F_DODEL) {
 400                         /*
 401                          * Delete unacceptable rates.
 402                          */
 403                         if (ignore) {
 404                                 nrs->rs_nrates--;
 405                                 for (j = i; j < nrs->rs_nrates; j++)
 406                                         nrs->rs_rates[j] = nrs->rs_rates[j + 1];
 407                                 nrs->rs_rates[j] = 0;
 408                                 continue;
 409                         }
 410                 }
 411                 if (!ignore)
 412                         okrate = nrs->rs_rates[i];
 413                 i++;
 414         }
 415         if (okrate == 0 || error != 0 ||
 416             ((flags & IEEE80211_F_DOFRATE) && fixedrate == 0))
 417                 return badrate | IEEE80211_RATE_BASIC;
 418         else
 419                 return RV(okrate);
 420 #undef RV
 421 }
 422
 423 /*
 424  * Reset 11g-related state.
 425  */
 426 void
 427 ieee80211_reset_erp(struct ieee80211com *ic)
 428 {
 429         ic->ic_flags &= ~IEEE80211_F_USEPROT;
 430         ic->ic_nonerpsta = 0;
 431         ic->ic_longslotsta = 0;
 432         /*
 433          * Short slot time is enabled only when operating in 11g
 434          * and not in an IBSS.  We must also honor whether or not
 435          * the driver is capable of doing it.
 436          */
 437         ieee80211_set_shortslottime(ic,
 438                 ic->ic_curmode == IEEE80211_MODE_11A ||
 439                 (ic->ic_curmode == IEEE80211_MODE_11G &&
 440                 ic->ic_opmode == IEEE80211_M_HOSTAP &&
 441                 (ic->ic_caps & IEEE80211_C_SHSLOT)));
 442         /*
 443          * Set short preamble and ERP barker-preamble flags.
 444          */
 445         if (ic->ic_curmode == IEEE80211_MODE_11A ||
 446             (ic->ic_caps & IEEE80211_C_SHPREAMBLE)) {
 447                 ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
 448                 ic->ic_flags &= ~IEEE80211_F_USEBARKER;
 449         } else {
 450                 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
 451                 ic->ic_flags |= IEEE80211_F_USEBARKER;
 452         }
 453 }
 454
 455 /*
 456  * Set the short slot time state and notify the driver.
 457  */
 458 void
 459 ieee80211_set_shortslottime(struct ieee80211com *ic, int onoff)
 460 {
 461         if (onoff)
 462                 ic->ic_flags |= IEEE80211_F_SHSLOT;
 463         else
 464                 ic->ic_flags &= ~IEEE80211_F_SHSLOT;
 465         /* notify driver */
 466         if (ic->ic_updateslot != NULL)
 467                 ic->ic_updateslot(ic->ic_ifp);
 468 }
 469
 470 /*
 471  * Check if the specified rate set supports ERP.
 472  * NB: the rate set is assumed to be sorted.
 473  */
 474 int
 475 ieee80211_iserp_rateset(struct ieee80211com *ic, struct ieee80211_rateset *rs)
 476 {
 477 #define N(a)    (sizeof(a) / sizeof(a[0]))
 478         static const int rates[] = { 2, 4, 11, 22, 12, 24, 48 };
 479         int i, j;
 480
 481         if (rs->rs_nrates < N(rates))
 482                 return 0;
 483         for (i = 0; i < N(rates); i++) {
 484                 for (j = 0; j < rs->rs_nrates; j++) {
 485                         int r = rs->rs_rates[j] & IEEE80211_RATE_VAL;
 486                         if (rates[i] == r)
 487                                 goto next;
 488                         if (r > rates[i])
 489                                 return 0;
 490                 }
 491                 return 0;
 492         next:
 493                 ;
 494         }
 495         return 1;
 496 #undef N
 497 }
 498
 499 /*
 500  * Mark the basic rates for the 11g rate table based on the
 501  * operating mode.  For real 11g we mark all the 11b rates
 502  * and 6, 12, and 24 OFDM.  For 11b compatibility we mark only
 503  * 11b rates.  There's also a pseudo 11a-mode used to mark only
 504  * the basic OFDM rates.
 505  */
 506 void
 507 ieee80211_set11gbasicrates(struct ieee80211_rateset *rs, enum ieee80211_phymode mode)
 508 {
 509         static const struct ieee80211_rateset basic[] = {
 510             { 0 },                      /* IEEE80211_MODE_AUTO */
 511             { 3, { 12, 24, 48 } },      /* IEEE80211_MODE_11A */
 512             { 2, { 2, 4 } },            /* IEEE80211_MODE_11B */
 513             { 4, { 2, 4, 11, 22 } },    /* IEEE80211_MODE_11G (mixed b/g) */
 514             { 0 },                      /* IEEE80211_MODE_FH */
 515                                         /* IEEE80211_MODE_PUREG (not yet) */
 516             { 7, { 2, 4, 11, 22, 12, 24, 48 } },
 517         };
 518         int i, j;
 519
 520         for (i = 0; i < rs->rs_nrates; i++) {
 521                 rs->rs_rates[i] &= IEEE80211_RATE_VAL;
 522                 for (j = 0; j < basic[mode].rs_nrates; j++)
 523                         if (basic[mode].rs_rates[j] == rs->rs_rates[i]) {
 524                                 rs->rs_rates[i] |= IEEE80211_RATE_BASIC;
 525                                 break;
 526                         }
 527         }
 528 }
 529
 530 /*
 531  * WME protocol support.  The following parameters come from the spec.
 532  */
 533 typedef struct phyParamType {
 534         uint8_t aifsn;
 535         uint8_t logcwmin;
 536         uint8_t logcwmax;
 537         uint16_t txopLimit;
 538         uint8_t acm;
 539 } paramType;
 540
 541 static const struct phyParamType phyParamForAC_BE[IEEE80211_MODE_MAX] = {
 542         { 3, 4, 6 },            /* IEEE80211_MODE_AUTO */
 543         { 3, 4, 6 },            /* IEEE80211_MODE_11A */
 544         { 3, 5, 7 },            /* IEEE80211_MODE_11B */
 545         { 3, 4, 6 },            /* IEEE80211_MODE_11G */
 546         { 3, 5, 7 },            /* IEEE80211_MODE_FH */
 547         { 2, 3, 5 },            /* IEEE80211_MODE_TURBO_A */
 548         { 2, 3, 5 },            /* IEEE80211_MODE_TURBO_G */
 549 };
 550 static const struct phyParamType phyParamForAC_BK[IEEE80211_MODE_MAX] = {
 551         { 7, 4, 10 },           /* IEEE80211_MODE_AUTO */
 552         { 7, 4, 10 },           /* IEEE80211_MODE_11A */
 553         { 7, 5, 10 },           /* IEEE80211_MODE_11B */
 554         { 7, 4, 10 },           /* IEEE80211_MODE_11G */
 555         { 7, 5, 10 },           /* IEEE80211_MODE_FH */
 556         { 7, 3, 10 },           /* IEEE80211_MODE_TURBO_A */
 557         { 7, 3, 10 },           /* IEEE80211_MODE_TURBO_G */
 558 };
 559 static const struct phyParamType phyParamForAC_VI[IEEE80211_MODE_MAX] = {
 560         { 1, 3, 4,  94 },       /* IEEE80211_MODE_AUTO */
 561         { 1, 3, 4,  94 },       /* IEEE80211_MODE_11A */
 562         { 1, 4, 5, 188 },       /* IEEE80211_MODE_11B */
 563         { 1, 3, 4,  94 },       /* IEEE80211_MODE_11G */
 564         { 1, 4, 5, 188 },       /* IEEE80211_MODE_FH */
 565         { 1, 2, 3,  94 },       /* IEEE80211_MODE_TURBO_A */
 566         { 1, 2, 3,  94 },       /* IEEE80211_MODE_TURBO_G */
 567 };
 568 static const struct phyParamType phyParamForAC_VO[IEEE80211_MODE_MAX] = {
 569         { 1, 2, 3,  47 },       /* IEEE80211_MODE_AUTO */
 570         { 1, 2, 3,  47 },       /* IEEE80211_MODE_11A */
 571         { 1, 3, 4, 102 },       /* IEEE80211_MODE_11B */
 572         { 1, 2, 3,  47 },       /* IEEE80211_MODE_11G */
 573         { 1, 3, 4, 102 },       /* IEEE80211_MODE_FH */
 574         { 1, 2, 2,  47 },       /* IEEE80211_MODE_TURBO_A */
 575         { 1, 2, 2,  47 },       /* IEEE80211_MODE_TURBO_G */
 576 };
 577
 578 static const struct phyParamType bssPhyParamForAC_BE[IEEE80211_MODE_MAX] = {
 579         { 3, 4, 10 },           /* IEEE80211_MODE_AUTO */
 580         { 3, 4, 10 },           /* IEEE80211_MODE_11A */
 581         { 3, 5, 10 },           /* IEEE80211_MODE_11B */
 582         { 3, 4, 10 },           /* IEEE80211_MODE_11G */
 583         { 3, 5, 10 },           /* IEEE80211_MODE_FH */
 584         { 2, 3, 10 },           /* IEEE80211_MODE_TURBO_A */
 585         { 2, 3, 10 },           /* IEEE80211_MODE_TURBO_G */
 586 };
 587 static const struct phyParamType bssPhyParamForAC_VI[IEEE80211_MODE_MAX] = {
 588         { 2, 3, 4,  94 },       /* IEEE80211_MODE_AUTO */
 589         { 2, 3, 4,  94 },       /* IEEE80211_MODE_11A */
 590         { 2, 4, 5, 188 },       /* IEEE80211_MODE_11B */
 591         { 2, 3, 4,  94 },       /* IEEE80211_MODE_11G */
 592         { 2, 4, 5, 188 },       /* IEEE80211_MODE_FH */
 593         { 2, 2, 3,  94 },       /* IEEE80211_MODE_TURBO_A */
 594         { 2, 2, 3,  94 },       /* IEEE80211_MODE_TURBO_G */
 595 };
 596 static const struct phyParamType bssPhyParamForAC_VO[IEEE80211_MODE_MAX] = {
 597         { 2, 2, 3,  47 },       /* IEEE80211_MODE_AUTO */
 598         { 2, 2, 3,  47 },       /* IEEE80211_MODE_11A */
 599         { 2, 3, 4, 102 },       /* IEEE80211_MODE_11B */
 600         { 2, 2, 3,  47 },       /* IEEE80211_MODE_11G */
 601         { 2, 3, 4, 102 },       /* IEEE80211_MODE_FH */
 602         { 1, 2, 2,  47 },       /* IEEE80211_MODE_TURBO_A */
 603         { 1, 2, 2,  47 },       /* IEEE80211_MODE_TURBO_G */
 604 };
 605
 606 void
 607 ieee80211_wme_initparams(struct ieee80211com *ic)
 608 {
 609         struct ieee80211_wme_state *wme = &ic->ic_wme;
 610         const paramType *pPhyParam, *pBssPhyParam;
 611         struct wmeParams *wmep;
 612         int i;
 613
 614         if ((ic->ic_caps & IEEE80211_C_WME) == 0)
 615                 return;
 616
 617         for (i = 0; i < WME_NUM_AC; i++) {
 618                 switch (i) {
 619                 case WME_AC_BK:
 620                         pPhyParam = &phyParamForAC_BK[ic->ic_curmode];
 621                         pBssPhyParam = &phyParamForAC_BK[ic->ic_curmode];
 622                         break;
 623                 case WME_AC_VI:
 624                         pPhyParam = &phyParamForAC_VI[ic->ic_curmode];
 625                         pBssPhyParam = &bssPhyParamForAC_VI[ic->ic_curmode];
 626                         break;
 627                 case WME_AC_VO:
 628                         pPhyParam = &phyParamForAC_VO[ic->ic_curmode];
 629                         pBssPhyParam = &bssPhyParamForAC_VO[ic->ic_curmode];
 630                         break;
 631                 case WME_AC_BE:
 632                 default:
 633                         pPhyParam = &phyParamForAC_BE[ic->ic_curmode];
 634                         pBssPhyParam = &bssPhyParamForAC_BE[ic->ic_curmode];
 635                         break;
 636                 }
 637
 638                 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i];
 639                 if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
 640                         wmep->wmep_acm = pPhyParam->acm;
 641                         wmep->wmep_aifsn = pPhyParam->aifsn;
 642                         wmep->wmep_logcwmin = pPhyParam->logcwmin;
 643                         wmep->wmep_logcwmax = pPhyParam->logcwmax;
 644                         wmep->wmep_txopLimit = pPhyParam->txopLimit;
 645                 } else {
 646                         wmep->wmep_acm = pBssPhyParam->acm;
 647                         wmep->wmep_aifsn = pBssPhyParam->aifsn;
 648                         wmep->wmep_logcwmin = pBssPhyParam->logcwmin;
 649                         wmep->wmep_logcwmax = pBssPhyParam->logcwmax;
 650                         wmep->wmep_txopLimit = pBssPhyParam->txopLimit;
 651
 652                 }
 653                 IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
 654                         "%s: %s chan [acm %u aifsn %u log2(cwmin) %u "
 655                         "log2(cwmax) %u txpoLimit %u]\n", __func__
 656                         , ieee80211_wme_acnames[i]
 657                         , wmep->wmep_acm
 658                         , wmep->wmep_aifsn
 659                         , wmep->wmep_logcwmin
 660                         , wmep->wmep_logcwmax
 661                         , wmep->wmep_txopLimit
 662                 );
 663
 664                 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i];
 665                 wmep->wmep_acm = pBssPhyParam->acm;
 666                 wmep->wmep_aifsn = pBssPhyParam->aifsn;
 667                 wmep->wmep_logcwmin = pBssPhyParam->logcwmin;
 668                 wmep->wmep_logcwmax = pBssPhyParam->logcwmax;
 669                 wmep->wmep_txopLimit = pBssPhyParam->txopLimit;
 670                 IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
 671                         "%s: %s  bss [acm %u aifsn %u log2(cwmin) %u "
 672                         "log2(cwmax) %u txpoLimit %u]\n", __func__
 673                         , ieee80211_wme_acnames[i]
 674                         , wmep->wmep_acm
 675                         , wmep->wmep_aifsn
 676                         , wmep->wmep_logcwmin
 677                         , wmep->wmep_logcwmax
 678                         , wmep->wmep_txopLimit
 679                 );
 680         }
 681         /* NB: check ic_bss to avoid NULL deref on initial attach */
 682         if (ic->ic_bss != NULL) {
 683                 /*
 684                  * Calculate agressive mode switching threshold based
 685                  * on beacon interval.  This doesn't need locking since
 686                  * we're only called before entering the RUN state at
 687                  * which point we start sending beacon frames.
 688                  */
 689                 wme->wme_hipri_switch_thresh =
 690                         (HIGH_PRI_SWITCH_THRESH * ic->ic_bss->ni_intval) / 100;
 691                 ieee80211_wme_updateparams(ic);
 692         }
 693 }
 694
 695 /*
 696  * Update WME parameters for ourself and the BSS.
 697  */
 698 void
 699 ieee80211_wme_updateparams(struct ieee80211com *ic)
 700 {
 701         static const paramType phyParam[IEEE80211_MODE_MAX] = {
 702                 { 2, 4, 10, 64 },       /* IEEE80211_MODE_AUTO */
 703                 { 2, 4, 10, 64 },       /* IEEE80211_MODE_11A */
 704                 { 2, 5, 10, 64 },       /* IEEE80211_MODE_11B */
 705                 { 2, 4, 10, 64 },       /* IEEE80211_MODE_11G */
 706                 { 2, 5, 10, 64 },       /* IEEE80211_MODE_FH */
 707                 { 1, 3, 10, 64 },       /* IEEE80211_MODE_TURBO_A */
 708                 { 1, 3, 10, 64 },       /* IEEE80211_MODE_TURBO_G */
 709         };
 710         struct ieee80211_wme_state *wme = &ic->ic_wme;
 711         const struct wmeParams *wmep;
 712         struct wmeParams *chanp, *bssp;
 713         int i;
 714
 715         ASSERT_SERIALIZED(ic->ic_ifp->if_serializer);
 716
 717         if ((ic->ic_caps & IEEE80211_C_WME) == 0)
 718                 return;
 719
 720         /* set up the channel access parameters for the physical device */
 721         for (i = 0; i < WME_NUM_AC; i++) {
 722                 chanp = &wme->wme_chanParams.cap_wmeParams[i];
 723                 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i];
 724                 chanp->wmep_aifsn = wmep->wmep_aifsn;
 725                 chanp->wmep_logcwmin = wmep->wmep_logcwmin;
 726                 chanp->wmep_logcwmax = wmep->wmep_logcwmax;
 727                 chanp->wmep_txopLimit = wmep->wmep_txopLimit;
 728
 729                 chanp = &wme->wme_bssChanParams.cap_wmeParams[i];
 730                 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i];
 731                 chanp->wmep_aifsn = wmep->wmep_aifsn;
 732                 chanp->wmep_logcwmin = wmep->wmep_logcwmin;
 733                 chanp->wmep_logcwmax = wmep->wmep_logcwmax;
 734                 chanp->wmep_txopLimit = wmep->wmep_txopLimit;
 735         }
 736
 737         /*
 738          * This implements agressive mode as found in certain
 739          * vendors' AP's.  When there is significant high
 740          * priority (VI/VO) traffic in the BSS throttle back BE
 741          * traffic by using conservative parameters.  Otherwise
 742          * BE uses agressive params to optimize performance of
 743          * legacy/non-QoS traffic.
 744          */
 745         if ((ic->ic_opmode == IEEE80211_M_HOSTAP &&
 746              (wme->wme_flags & WME_F_AGGRMODE) != 0) ||
 747             (ic->ic_opmode == IEEE80211_M_STA &&
 748              (ic->ic_bss->ni_flags & IEEE80211_NODE_QOS) == 0) ||
 749             (ic->ic_flags & IEEE80211_F_WME) == 0) {
 750                 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE];
 751                 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE];
 752
 753                 chanp->wmep_aifsn = bssp->wmep_aifsn =
 754                         phyParam[ic->ic_curmode].aifsn;
 755                 chanp->wmep_logcwmin = bssp->wmep_logcwmin =
 756                         phyParam[ic->ic_curmode].logcwmin;
 757                 chanp->wmep_logcwmax = bssp->wmep_logcwmax =
 758                         phyParam[ic->ic_curmode].logcwmax;
 759                 chanp->wmep_txopLimit = bssp->wmep_txopLimit =
 760                         (ic->ic_flags & IEEE80211_F_BURST) ?
 761                                 phyParam[ic->ic_curmode].txopLimit : 0;
 762                 IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
 763                         "%s: %s [acm %u aifsn %u log2(cwmin) %u "
 764                         "log2(cwmax) %u txpoLimit %u]\n", __func__
 765                         , ieee80211_wme_acnames[WME_AC_BE]
 766                         , chanp->wmep_acm
 767                         , chanp->wmep_aifsn
 768                         , chanp->wmep_logcwmin
 769                         , chanp->wmep_logcwmax
 770                         , chanp->wmep_txopLimit
 771                 );
 772         }
 773
 774         if (ic->ic_opmode == IEEE80211_M_HOSTAP &&
 775             ic->ic_sta_assoc < 2 && (wme->wme_flags & WME_F_AGGRMODE) != 0) {
 776                 static const uint8_t logCwMin[IEEE80211_MODE_MAX] = {
 777                         3,      /* IEEE80211_MODE_AUTO */
 778                         3,      /* IEEE80211_MODE_11A */
 779                         4,      /* IEEE80211_MODE_11B */
 780                         3,      /* IEEE80211_MODE_11G */
 781                         4,      /* IEEE80211_MODE_FH */
 782                         3,      /* IEEE80211_MODE_TURBO_A */
 783                         3,      /* IEEE80211_MODE_TURBO_G */
 784                 };
 785                 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE];
 786                 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE];
 787
 788                 chanp->wmep_logcwmin = bssp->wmep_logcwmin =
 789                         logCwMin[ic->ic_curmode];
 790                 IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
 791                         "%s: %s log2(cwmin) %u\n", __func__
 792                         , ieee80211_wme_acnames[WME_AC_BE]
 793                         , chanp->wmep_logcwmin
 794                 );
 795         }
 796         if (ic->ic_opmode == IEEE80211_M_HOSTAP) {      /* XXX ibss? */
 797                 /*
 798                  * Arrange for a beacon update and bump the parameter
 799                  * set number so associated stations load the new values.
 800                  */
 801                 wme->wme_bssChanParams.cap_info =
 802                         (wme->wme_bssChanParams.cap_info+1) & WME_QOSINFO_COUNT;
 803                 ic->ic_flags |= IEEE80211_F_WMEUPDATE;
 804         }
 805
 806         wme->wme_update(ic);
 807
 808         IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
 809                 "%s: WME params updated, cap_info 0x%x\n", __func__,
 810                 ic->ic_opmode == IEEE80211_M_STA ?
 811                         wme->wme_wmeChanParams.cap_info :
 812                         wme->wme_bssChanParams.cap_info);
 813 }
 814
 815 void
 816 ieee80211_beacon_miss(struct ieee80211com *ic)
 817 {
 818
 819         if (ic->ic_flags & IEEE80211_F_SCAN) {
 820                 /* XXX check ic_curchan != ic_bsschan? */
 821                 return;
 822         }
 823         IEEE80211_DPRINTF(ic,
 824                 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
 825                 "%s\n", "beacon miss");
 826
 827         /*
 828          * Our handling is only meaningful for stations that are
 829          * associated; any other conditions else will be handled
 830          * through different means (e.g. the tx timeout on mgt frames).
 831          */
 832         if (ic->ic_opmode != IEEE80211_M_STA || ic->ic_state != IEEE80211_S_RUN)
 833                 return;
 834
 835         if (++ic->ic_bmiss_count < ic->ic_bmiss_max) {
 836                 /*
 837                  * Send a directed probe req before falling back to a scan;
 838                  * if we receive a response ic_bmiss_count will be reset.
 839                  * Some cards mistakenly report beacon miss so this avoids
 840                  * the expensive scan if the ap is still there.
 841                  */
 842                 ieee80211_send_probereq(ic->ic_bss, ic->ic_myaddr,
 843                         ic->ic_bss->ni_bssid, ic->ic_bss->ni_bssid,
 844                         ic->ic_bss->ni_essid, ic->ic_bss->ni_esslen,
 845                         ic->ic_opt_ie, ic->ic_opt_ie_len);
 846                 return;
 847         }
 848         ic->ic_bmiss_count = 0;
 849         ieee80211_new_state(ic, IEEE80211_S_SCAN, 0);
 850 }
 851
 852 /*
 853  * Software beacon miss handling.  Check if any beacons
 854  * were received in the last period.  If not post a
 855  * beacon miss; otherwise reset the counter.
 856  */
 857 static void
 858 ieee80211_swbmiss(void *arg)
 859 {
 860         struct ieee80211com *ic = arg;
 861         struct ifnet *ifp = ic->ic_ifp;
 862
 863         lwkt_serialize_enter(ifp->if_serializer);
 864
 865         if (ic->ic_swbmiss_count == 0) {
 866                 ieee80211_beacon_miss(ic);
 867                 if (ic->ic_bmiss_count == 0)    /* don't re-arm timer */
 868                         goto back;
 869         } else
 870                 ic->ic_swbmiss_count = 0;
 871         callout_reset(&ic->ic_swbmiss, ic->ic_swbmiss_period,
 872                 ieee80211_swbmiss, ic);
 873
 874 back:
 875         lwkt_serialize_exit(ifp->if_serializer);
 876 }
 877
 878 static void
 879 sta_disassoc(void *arg, struct ieee80211_node *ni)
 880 {
 881         struct ieee80211com *ic = arg;
 882
 883         if (ni->ni_associd != 0) {
 884                 IEEE80211_SEND_MGMT(ic, ni, IEEE80211_FC0_SUBTYPE_DISASSOC,
 885                         IEEE80211_REASON_ASSOC_LEAVE);
 886                 ieee80211_node_leave(ic, ni);
 887         }
 888 }
 889
 890 static void
 891 sta_deauth(void *arg, struct ieee80211_node *ni)
 892 {
 893         struct ieee80211com *ic = arg;
 894
 895         IEEE80211_SEND_MGMT(ic, ni, IEEE80211_FC0_SUBTYPE_DEAUTH,
 896                 IEEE80211_REASON_ASSOC_LEAVE);
 897 }
 898
 899 static int
 900 ieee80211_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg)
 901 {
 902         struct ifnet *ifp = ic->ic_ifp;
 903         struct ieee80211_node *ni;
 904         enum ieee80211_state ostate;
 905
 906         ostate = ic->ic_state;
 907         IEEE80211_DPRINTF(ic, IEEE80211_MSG_STATE, "%s: %s -> %s\n", __func__,
 908                 ieee80211_state_name[ostate], ieee80211_state_name[nstate]);
 909         ic->ic_state = nstate;                  /* state transition */
 910         ni = ic->ic_bss;                        /* NB: no reference held */
 911         if (ic->ic_flags_ext & IEEE80211_FEXT_SWBMISS)
 912                 callout_stop(&ic->ic_swbmiss);
 913         switch (nstate) {
 914         case IEEE80211_S_INIT:
 915                 switch (ostate) {
 916                 case IEEE80211_S_INIT:
 917                         break;
 918                 case IEEE80211_S_RUN:
 919                         switch (ic->ic_opmode) {
 920                         case IEEE80211_M_STA:
 921                                 IEEE80211_SEND_MGMT(ic, ni,
 922                                     IEEE80211_FC0_SUBTYPE_DISASSOC,
 923                                     IEEE80211_REASON_ASSOC_LEAVE);
 924                                 ieee80211_sta_leave(ic, ni);
 925                                 break;
 926                         case IEEE80211_M_HOSTAP:
 927                                 ieee80211_iterate_nodes(&ic->ic_sta,
 928                                         sta_disassoc, ic);
 929                                 break;
 930                         default:
 931                                 break;
 932                         }
 933                         goto reset;
 934                 case IEEE80211_S_ASSOC:
 935                         switch (ic->ic_opmode) {
 936                         case IEEE80211_M_STA:
 937                                 IEEE80211_SEND_MGMT(ic, ni,
 938                                     IEEE80211_FC0_SUBTYPE_DEAUTH,
 939                                     IEEE80211_REASON_AUTH_LEAVE);
 940                                 break;
 941                         case IEEE80211_M_HOSTAP:
 942                                 ieee80211_iterate_nodes(&ic->ic_sta,
 943                                         sta_deauth, ic);
 944                                 break;
 945                         default:
 946                                 break;
 947                         }
 948                         goto reset;
 949                 case IEEE80211_S_SCAN:
 950                         ieee80211_cancel_scan(ic);
 951                         goto reset;
 952                 case IEEE80211_S_AUTH:
 953                 reset:
 954                         ic->ic_mgt_timer = 0;
 955                         IF_DRAIN(&ic->ic_mgtq);
 956                         ieee80211_reset_bss(ic);
 957                         break;
 958                 }
 959                 if (ic->ic_auth->ia_detach != NULL)
 960                         ic->ic_auth->ia_detach(ic);
 961                 break;
 962         case IEEE80211_S_SCAN:
 963                 switch (ostate) {
 964                 case IEEE80211_S_INIT:
 965                         if ((ic->ic_opmode == IEEE80211_M_HOSTAP ||
 966                              ic->ic_opmode == IEEE80211_M_IBSS ||
 967                              ic->ic_opmode == IEEE80211_M_AHDEMO) &&
 968                             ic->ic_des_chan != IEEE80211_CHAN_ANYC) {
 969                                 /*
 970                                  * AP operation and we already have a channel;
 971                                  * bypass the scan and startup immediately.
 972                                  */
 973                                 ieee80211_create_ibss(ic, ic->ic_des_chan);
 974                         } else {
 975                                 ieee80211_begin_scan(ic, arg);
 976                         }
 977                         break;
 978                 case IEEE80211_S_SCAN:
 979                         /*
 980                          * Scan next. If doing an active scan probe
 981                          * for the requested ap (if any).
 982                          */
 983                         if (ic->ic_flags & IEEE80211_F_ASCAN)
 984                                 ieee80211_probe_curchan(ic, 0);
 985                         break;
 986                 case IEEE80211_S_RUN:
 987                         /* beacon miss */
 988                         IEEE80211_DPRINTF(ic, IEEE80211_MSG_STATE,
 989                                 "no recent beacons from %6D; rescanning\n",
 990                                 ic->ic_bss->ni_bssid, ":");
 991                         ieee80211_sta_leave(ic, ni);
 992                         ic->ic_flags &= ~IEEE80211_F_SIBSS;     /* XXX */
 993                         /* FALLTHRU */
 994                 case IEEE80211_S_AUTH:
 995                 case IEEE80211_S_ASSOC:
 996                         /* timeout restart scan */
 997                         ni = ieee80211_find_node(&ic->ic_scan,
 998                                 ic->ic_bss->ni_macaddr);
 999                         if (ni != NULL) {
1000                                 ni->ni_fails++;
1001                                 ieee80211_unref_node(&ni);
1002                         }
1003                         if (ic->ic_roaming == IEEE80211_ROAMING_AUTO)
1004                                 ieee80211_begin_scan(ic, arg);
1005                         break;
1006                 }
1007                 break;
1008         case IEEE80211_S_AUTH:
1009                 switch (ostate) {
1010                 case IEEE80211_S_INIT:
1011                 case IEEE80211_S_SCAN:
1012                         IEEE80211_SEND_MGMT(ic, ni,
1013                             IEEE80211_FC0_SUBTYPE_AUTH, 1);
1014                         break;
1015                 case IEEE80211_S_AUTH:
1016                 case IEEE80211_S_ASSOC:
1017                         switch (arg) {
1018                         case IEEE80211_FC0_SUBTYPE_AUTH:
1019                                 /* ??? */
1020                                 IEEE80211_SEND_MGMT(ic, ni,
1021                                     IEEE80211_FC0_SUBTYPE_AUTH, 2);
1022                                 break;
1023                         case IEEE80211_FC0_SUBTYPE_DEAUTH:
1024                                 /* ignore and retry scan on timeout */
1025                                 break;
1026                         }
1027                         break;
1028                 case IEEE80211_S_RUN:
1029                         switch (arg) {
1030                         case IEEE80211_FC0_SUBTYPE_AUTH:
1031                                 IEEE80211_SEND_MGMT(ic, ni,
1032                                     IEEE80211_FC0_SUBTYPE_AUTH, 2);
1033                                 ic->ic_state = ostate;  /* stay RUN */
1034                                 break;
1035                         case IEEE80211_FC0_SUBTYPE_DEAUTH:
1036                                 ieee80211_sta_leave(ic, ni);
1037                                 if (ic->ic_roaming == IEEE80211_ROAMING_AUTO) {
1038                                         /* try to reauth */
1039                                         IEEE80211_SEND_MGMT(ic, ni,
1040                                             IEEE80211_FC0_SUBTYPE_AUTH, 1);
1041                                 }
1042                                 break;
1043                         }
1044                         break;
1045                 }
1046                 break;
1047         case IEEE80211_S_ASSOC:
1048                 switch (ostate) {
1049                 case IEEE80211_S_INIT:
1050                 case IEEE80211_S_SCAN:
1051                 case IEEE80211_S_ASSOC:
1052                         IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY,
1053                                 "%s: invalid transition\n", __func__);
1054                         break;
1055                 case IEEE80211_S_AUTH:
1056                         IEEE80211_SEND_MGMT(ic, ni,
1057                             IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0);
1058                         break;
1059                 case IEEE80211_S_RUN:
1060                         ieee80211_sta_leave(ic, ni);
1061                         if (ic->ic_roaming == IEEE80211_ROAMING_AUTO) {
1062                                 IEEE80211_SEND_MGMT(ic, ni,
1063                                     IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 1);
1064                         }
1065                         break;
1066                 }
1067                 break;
1068         case IEEE80211_S_RUN:
1069                 if (ic->ic_flags & IEEE80211_F_WPA) {
1070                         /* XXX validate prerequisites */
1071                 }
1072                 switch (ostate) {
1073                 case IEEE80211_S_INIT:
1074                         if (ic->ic_opmode == IEEE80211_M_MONITOR)
1075                                 break;
1076                         /* fall thru... */
1077                 case IEEE80211_S_AUTH:
1078                         IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY,
1079                                 "%s: invalid transition\n", __func__);
1080                         /* fall thru... */
1081                 case IEEE80211_S_RUN:
1082                         break;
1083                 case IEEE80211_S_SCAN:          /* adhoc/hostap mode */
1084                 case IEEE80211_S_ASSOC:         /* infra mode */
1085                         KASSERT(ni->ni_txrate < ni->ni_rates.rs_nrates,
1086                                 ("%s: bogus xmit rate %u setup\n", __func__,
1087                                         ni->ni_txrate));
1088 #ifdef IEEE80211_DEBUG
1089                         if (ieee80211_msg_debug(ic)) {
1090                                 if (ic->ic_opmode == IEEE80211_M_STA)
1091                                         if_printf(ifp, "associated ");
1092                                 else
1093                                         if_printf(ifp, "synchronized ");
1094                                 printf("with %6D ssid ", ni->ni_bssid, ":");
1095                                 ieee80211_print_essid(ic->ic_bss->ni_essid,
1096                                     ni->ni_esslen);
1097                                 printf(" channel %d start %uMb\n",
1098                                         ieee80211_chan2ieee(ic, ic->ic_curchan),
1099                                         IEEE80211_RATE2MBS(ni->ni_rates.rs_rates[ni->ni_txrate]));
1100                         }
1101 #endif
1102                         ic->ic_mgt_timer = 0;
1103                         if (ic->ic_opmode == IEEE80211_M_STA)
1104                                 ieee80211_notify_node_join(ic, ni,
1105                                         arg == IEEE80211_FC0_SUBTYPE_ASSOC_RESP);
1106                         ifp->if_start(ifp);     /* XXX not authorized yet */
1107                         break;
1108                 }
1109                 if (ostate != IEEE80211_S_RUN &&
1110                     ic->ic_opmode == IEEE80211_M_STA &&
1111                     (ic->ic_flags_ext & IEEE80211_FEXT_SWBMISS)) {
1112                         /*
1113                          * Start s/w beacon miss timer for devices w/o
1114                          * hardware support.  We fudge a bit here since
1115                          * we're doing this in software.
1116                          */
1117                         ic->ic_swbmiss_period = IEEE80211_TU_TO_TICKS(
1118                                 2 * ic->ic_bmissthreshold * ni->ni_intval);
1119                         ic->ic_swbmiss_count = 0;
1120                         callout_reset(&ic->ic_swbmiss, ic->ic_swbmiss_period,
1121                                 ieee80211_swbmiss, ic);
1122                 }
1123                 /*
1124                  * Start/stop the authenticator when operating as an
1125                  * AP.  We delay until here to allow configuration to
1126                  * happen out of order.
1127                  */
1128                 if (ic->ic_opmode == IEEE80211_M_HOSTAP && /* XXX IBSS/AHDEMO */
1129                     ic->ic_auth->ia_attach != NULL) {
1130                         /* XXX check failure */
1131                         ic->ic_auth->ia_attach(ic);
1132                 } else if (ic->ic_auth->ia_detach != NULL) {
1133                         ic->ic_auth->ia_detach(ic);
1134                 }
1135                 /*
1136                  * When 802.1x is not in use mark the port authorized
1137                  * at this point so traffic can flow.
1138                  */
1139                 if (ni->ni_authmode != IEEE80211_AUTH_8021X)
1140                         ieee80211_node_authorize(ni);
1141                 /*
1142                  * Enable inactivity processing.
1143                  * XXX
1144                  */
1145                 ic->ic_scan.nt_inact_timer = IEEE80211_INACT_WAIT;
1146                 ic->ic_sta.nt_inact_timer = IEEE80211_INACT_WAIT;
1147                 break;
1148         }
1149         return 0;
1150 }