The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/net80211/ieee80211_proto.c

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    1 /*      $NetBSD: ieee80211_proto.c,v 1.29 2008/01/13 13:01:12 degroote Exp $    */
    2 /*-
    3  * Copyright (c) 2001 Atsushi Onoe
    4  * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. The name of the author may not be used to endorse or promote products
   16  *    derived from this software without specific prior written permission.
   17  *
   18  * Alternatively, this software may be distributed under the terms of the
   19  * GNU General Public License ("GPL") version 2 as published by the Free
   20  * Software Foundation.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   32  */
   33 
   34 #include <sys/cdefs.h>
   35 #ifdef __FreeBSD__
   36 __FBSDID("$FreeBSD: src/sys/net80211/ieee80211_proto.c,v 1.23 2005/08/10 16:22:29 sam Exp $");
   37 #endif
   38 #ifdef __NetBSD__
   39 __KERNEL_RCSID(0, "$NetBSD: ieee80211_proto.c,v 1.29 2008/01/13 13:01:12 degroote Exp $");
   40 #endif
   41 
   42 /*
   43  * IEEE 802.11 protocol support.
   44  */
   45 
   46 #include "opt_inet.h"
   47 
   48 #include <sys/param.h>
   49 #include <sys/kernel.h>
   50 #include <sys/systm.h> 
   51  
   52 #include <sys/socket.h>
   53 #include <sys/sockio.h>
   54 #include <sys/endian.h>
   55 #include <sys/errno.h>
   56 #include <sys/proc.h>
   57 #include <sys/sysctl.h>
   58 
   59 #include <net/if.h>
   60 #include <net/if_media.h>
   61 #include <net/if_arp.h>
   62 #include <net/if_ether.h>
   63 #include <net/if_llc.h>
   64 
   65 #include <net80211/ieee80211_netbsd.h>
   66 #include <net80211/ieee80211_var.h>
   67 
   68 #include <net/bpf.h>
   69 
   70 #ifdef INET
   71 #include <netinet/in.h> 
   72 #include <net/if_ether.h>
   73 #endif
   74 
   75 #include <net/route.h>
   76 /* XXX tunables */
   77 #define AGGRESSIVE_MODE_SWITCH_HYSTERESIS       3       /* pkts / 100ms */
   78 #define HIGH_PRI_SWITCH_THRESH                  10      /* pkts / 100ms */
   79 
   80 #define IEEE80211_RATE2MBS(r)   (((r) & IEEE80211_RATE_VAL) / 2)
   81 
   82 const char *ieee80211_mgt_subtype_name[] = {
   83         "assoc_req",    "assoc_resp",   "reassoc_req",  "reassoc_resp",
   84         "probe_req",    "probe_resp",   "reserved#6",   "reserved#7",
   85         "beacon",       "atim",         "disassoc",     "auth",
   86         "deauth",       "reserved#13",  "reserved#14",  "reserved#15"
   87 };
   88 const char *ieee80211_ctl_subtype_name[] = {
   89         "reserved#0",   "reserved#1",   "reserved#2",   "reserved#3",
   90         "reserved#3",   "reserved#5",   "reserved#6",   "reserved#7",
   91         "reserved#8",   "reserved#9",   "ps_poll",      "rts",
   92         "cts",          "ack",          "cf_end",       "cf_end_ack"
   93 };
   94 const char *ieee80211_state_name[IEEE80211_S_MAX] = {
   95         "INIT",         /* IEEE80211_S_INIT */
   96         "SCAN",         /* IEEE80211_S_SCAN */
   97         "AUTH",         /* IEEE80211_S_AUTH */
   98         "ASSOC",        /* IEEE80211_S_ASSOC */
   99         "RUN"           /* IEEE80211_S_RUN */
  100 };
  101 const char *ieee80211_wme_acnames[] = {
  102         "WME_AC_BE",
  103         "WME_AC_BK",
  104         "WME_AC_VI",
  105         "WME_AC_VO",
  106         "WME_UPSD",
  107 };
  108 
  109 static int ieee80211_newstate(struct ieee80211com *, enum ieee80211_state, int);
  110 
  111 void
  112 ieee80211_proto_attach(struct ieee80211com *ic)
  113 {
  114         struct ifnet *ifp = ic->ic_ifp;
  115 
  116         /* XXX room for crypto  */
  117         ifp->if_hdrlen = sizeof(struct ieee80211_qosframe_addr4);
  118 
  119         ic->ic_rtsthreshold = IEEE80211_RTS_DEFAULT;
  120         ic->ic_fragthreshold = IEEE80211_FRAG_DEFAULT;
  121         ic->ic_fixed_rate = IEEE80211_FIXED_RATE_NONE;
  122         ic->ic_bmiss_max = IEEE80211_BMISS_MAX;
  123         ic->ic_mcast_rate = IEEE80211_MCAST_RATE_DEFAULT;
  124         ic->ic_protmode = IEEE80211_PROT_CTSONLY;
  125         ic->ic_roaming = IEEE80211_ROAMING_AUTO;
  126 
  127         ic->ic_wme.wme_hipri_switch_hysteresis =
  128                 AGGRESSIVE_MODE_SWITCH_HYSTERESIS;
  129 
  130         /* protocol state change handler */
  131         ic->ic_newstate = ieee80211_newstate;
  132 
  133         /* initialize management frame handlers */
  134         ic->ic_recv_mgmt = ieee80211_recv_mgmt;
  135         ic->ic_send_mgmt = ieee80211_send_mgmt;
  136 }
  137 
  138 void
  139 ieee80211_proto_detach(struct ieee80211com *ic)
  140 {
  141 
  142         /*
  143          * This should not be needed as we detach when reseting
  144          * the state but be conservative here since the
  145          * authenticator may do things like spawn kernel threads.
  146          */
  147         if (ic->ic_auth->ia_detach)
  148                 ic->ic_auth->ia_detach(ic);
  149 
  150         ieee80211_drain_ifq(&ic->ic_mgtq);
  151 
  152         /*
  153          * Detach any ACL'ator.
  154          */
  155         if (ic->ic_acl != NULL)
  156                 ic->ic_acl->iac_detach(ic);
  157 }
  158 
  159 /*
  160  * Simple-minded authenticator module support.
  161  */
  162 
  163 #define IEEE80211_AUTH_MAX      (IEEE80211_AUTH_WPA+1)
  164 /* XXX well-known names */
  165 static const char *auth_modnames[IEEE80211_AUTH_MAX] = {
  166         "wlan_internal",        /* IEEE80211_AUTH_NONE */
  167         "wlan_internal",        /* IEEE80211_AUTH_OPEN */
  168         "wlan_internal",        /* IEEE80211_AUTH_SHARED */
  169         "wlan_xauth",           /* IEEE80211_AUTH_8021X  */
  170         "wlan_internal",        /* IEEE80211_AUTH_AUTO */
  171         "wlan_xauth",           /* IEEE80211_AUTH_WPA */
  172 };
  173 static const struct ieee80211_authenticator *authenticators[IEEE80211_AUTH_MAX];
  174 
  175 static const struct ieee80211_authenticator auth_internal = {
  176         .ia_name                = "wlan_internal",
  177         .ia_attach              = NULL,
  178         .ia_detach              = NULL,
  179         .ia_node_join           = NULL,
  180         .ia_node_leave          = NULL,
  181 };
  182 
  183 /*
  184  * Setup internal authenticators once; they are never unregistered.
  185  */
  186 static void
  187 ieee80211_auth_setup(void)
  188 {
  189         ieee80211_authenticator_register(IEEE80211_AUTH_OPEN, &auth_internal);
  190         ieee80211_authenticator_register(IEEE80211_AUTH_SHARED, &auth_internal);
  191         ieee80211_authenticator_register(IEEE80211_AUTH_AUTO, &auth_internal);
  192 }
  193 
  194 const struct ieee80211_authenticator *
  195 ieee80211_authenticator_get(int auth)
  196 {
  197         static int initialized = 0;
  198         if (!initialized) {
  199                 ieee80211_auth_setup();
  200                 initialized = 1;
  201         }
  202         if (auth >= IEEE80211_AUTH_MAX)
  203                 return NULL;
  204         if (authenticators[auth] == NULL)
  205                 ieee80211_load_module(auth_modnames[auth]);
  206         return authenticators[auth];
  207 }
  208 
  209 void
  210 ieee80211_authenticator_register(int type,
  211         const struct ieee80211_authenticator *auth)
  212 {
  213         if (type >= IEEE80211_AUTH_MAX)
  214                 return;
  215         authenticators[type] = auth;
  216 }
  217 
  218 void
  219 ieee80211_authenticator_unregister(int type)
  220 {
  221 
  222         if (type >= IEEE80211_AUTH_MAX)
  223                 return;
  224         authenticators[type] = NULL;
  225 }
  226 
  227 /*
  228  * Very simple-minded ACL module support.
  229  */
  230 /* XXX just one for now */
  231 static  const struct ieee80211_aclator *acl = NULL;
  232 
  233 void
  234 ieee80211_aclator_register(const struct ieee80211_aclator *iac)
  235 {
  236         printf("wlan: %s acl policy registered\n", iac->iac_name);
  237         acl = iac;
  238 }
  239 
  240 void
  241 ieee80211_aclator_unregister(const struct ieee80211_aclator *iac)
  242 {
  243         if (acl == iac)
  244                 acl = NULL;
  245         printf("wlan: %s acl policy unregistered\n", iac->iac_name);
  246 }
  247 
  248 const struct ieee80211_aclator *
  249 ieee80211_aclator_get(const char *name)
  250 {
  251         if (acl == NULL)
  252                 ieee80211_load_module("wlan_acl");
  253         return acl != NULL && strcmp(acl->iac_name, name) == 0 ? acl : NULL;
  254 }
  255 
  256 void
  257 ieee80211_print_essid(const u_int8_t *essid, int len)
  258 {
  259         const u_int8_t *p; 
  260         int i;
  261 
  262         if (len > IEEE80211_NWID_LEN)
  263                 len = IEEE80211_NWID_LEN;
  264         /* determine printable or not */
  265         for (i = 0, p = essid; i < len; i++, p++) {
  266                 if (*p < ' ' || *p > 0x7e)
  267                         break;
  268         }
  269         if (i == len) {
  270                 printf("\"");
  271                 for (i = 0, p = essid; i < len; i++, p++)
  272                         printf("%c", *p);
  273                 printf("\"");
  274         } else {
  275                 printf("0x");
  276                 for (i = 0, p = essid; i < len; i++, p++)
  277                         printf("%02x", *p);
  278         }
  279 }
  280 
  281 void
  282 ieee80211_dump_pkt(const u_int8_t *buf, int len, int rate, int rssi)
  283 {
  284         const struct ieee80211_frame *wh;
  285         int i;
  286 
  287         wh = (const struct ieee80211_frame *)buf;
  288         switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) {
  289         case IEEE80211_FC1_DIR_NODS:
  290                 printf("NODS %s", ether_sprintf(wh->i_addr2));
  291                 printf("->%s", ether_sprintf(wh->i_addr1));
  292                 printf("(%s)", ether_sprintf(wh->i_addr3));
  293                 break;
  294         case IEEE80211_FC1_DIR_TODS:
  295                 printf("TODS %s", ether_sprintf(wh->i_addr2));
  296                 printf("->%s", ether_sprintf(wh->i_addr3));
  297                 printf("(%s)", ether_sprintf(wh->i_addr1));
  298                 break;
  299         case IEEE80211_FC1_DIR_FROMDS:
  300                 printf("FRDS %s", ether_sprintf(wh->i_addr3));
  301                 printf("->%s", ether_sprintf(wh->i_addr1));
  302                 printf("(%s)", ether_sprintf(wh->i_addr2));
  303                 break;
  304         case IEEE80211_FC1_DIR_DSTODS:
  305                 printf("DSDS %s", ether_sprintf((const u_int8_t *)&wh[1]));
  306                 printf("->%s", ether_sprintf(wh->i_addr3));
  307                 printf("(%s", ether_sprintf(wh->i_addr2));
  308                 printf("->%s)", ether_sprintf(wh->i_addr1));
  309                 break;
  310         }
  311         switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) {
  312         case IEEE80211_FC0_TYPE_DATA:
  313                 printf(" data");
  314                 break;
  315         case IEEE80211_FC0_TYPE_MGT:
  316                 printf(" %s", ieee80211_mgt_subtype_name[
  317                     (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK)
  318                     >> IEEE80211_FC0_SUBTYPE_SHIFT]);
  319                 break;
  320         default:
  321                 printf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK);
  322                 break;
  323         }
  324         if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
  325                 printf(" WEP [IV");
  326                 for (i = 0; i < IEEE80211_WEP_IVLEN; i++)
  327                         printf(" %.02x", buf[sizeof(*wh)+i]);
  328                 printf(" KID %u]", buf[sizeof(*wh)+i] >> 6);
  329         }
  330         if (rate >= 0)
  331                 printf(" %dM", rate / 2);
  332         if (rssi >= 0)
  333                 printf(" +%d", rssi);
  334         printf("\n");
  335         if (len > 0) {
  336                 for (i = 0; i < len; i++) {
  337                         if ((i & 1) == 0)
  338                                 printf(" ");
  339                         printf("%02x", buf[i]);
  340                 }
  341                 printf("\n");
  342         }
  343 }
  344 
  345 int
  346 ieee80211_fix_rate(struct ieee80211_node *ni, int flags)
  347 {
  348 #define RV(v)   ((v) & IEEE80211_RATE_VAL)
  349         struct ieee80211com *ic = ni->ni_ic;
  350         int i, j, ignore, error;
  351         int okrate, badrate, fixedrate;
  352         struct ieee80211_rateset *srs, *nrs;
  353         u_int8_t r;
  354 
  355         /*
  356          * If the fixed rate check was requested but no
  357          * fixed has been defined then just remove it.
  358          */
  359         if ((flags & IEEE80211_F_DOFRATE) &&
  360             ic->ic_fixed_rate == IEEE80211_FIXED_RATE_NONE)
  361                 flags &= ~IEEE80211_F_DOFRATE;
  362         error = 0;
  363         okrate = badrate = fixedrate = 0;
  364         srs = &ic->ic_sup_rates[ieee80211_chan2mode(ic, ni->ni_chan)];
  365         nrs = &ni->ni_rates;
  366         for (i = 0; i < nrs->rs_nrates; ) {
  367                 ignore = 0;
  368                 if (flags & IEEE80211_F_DOSORT) {
  369                         /*
  370                          * Sort rates.
  371                          */
  372                         for (j = i + 1; j < nrs->rs_nrates; j++) {
  373                                 if (RV(nrs->rs_rates[i]) > RV(nrs->rs_rates[j])) {
  374                                         r = nrs->rs_rates[i];
  375                                         nrs->rs_rates[i] = nrs->rs_rates[j];
  376                                         nrs->rs_rates[j] = r;
  377                                 }
  378                         }
  379                 }
  380                 r = nrs->rs_rates[i] & IEEE80211_RATE_VAL;
  381                 badrate = r;
  382                 if (flags & IEEE80211_F_DOFRATE) {
  383                         /*
  384                          * Check any fixed rate is included. 
  385                          */
  386                         if (r == RV(srs->rs_rates[ic->ic_fixed_rate]))
  387                                 fixedrate = r;
  388                 }
  389                 if (flags & IEEE80211_F_DONEGO) {
  390                         /*
  391                          * Check against supported rates.
  392                          */
  393                         for (j = 0; j < srs->rs_nrates; j++) {
  394                                 if (r == RV(srs->rs_rates[j])) {
  395                                         /*
  396                                          * Overwrite with the supported rate
  397                                          * value so any basic rate bit is set.
  398                                          * This insures that response we send
  399                                          * to stations have the necessary basic
  400                                          * rate bit set.
  401                                          */
  402                                         nrs->rs_rates[i] = srs->rs_rates[j];
  403                                         break;
  404                                 }
  405                         }
  406                         if (j == srs->rs_nrates) {
  407                                 /*
  408                                  * A rate in the node's rate set is not
  409                                  * supported.  If this is a basic rate and we
  410                                  * are operating as an AP then this is an error.
  411                                  * Otherwise we just discard/ignore the rate.
  412                                  * Note that this is important for 11b stations
  413                                  * when they want to associate with an 11g AP.
  414                                  */
  415 #ifndef IEEE80211_NO_HOSTAP
  416                                 if (ic->ic_opmode == IEEE80211_M_HOSTAP &&
  417                                     (nrs->rs_rates[i] & IEEE80211_RATE_BASIC))
  418                                         error++;
  419 #endif /* !IEEE80211_NO_HOSTAP */
  420                                 ignore++;
  421                         }
  422                 }
  423                 if (flags & IEEE80211_F_DODEL) {
  424                         /*
  425                          * Delete unacceptable rates.
  426                          */
  427                         if (ignore) {
  428                                 nrs->rs_nrates--;
  429                                 for (j = i; j < nrs->rs_nrates; j++)
  430                                         nrs->rs_rates[j] = nrs->rs_rates[j + 1];
  431                                 nrs->rs_rates[j] = 0;
  432                                 continue;
  433                         }
  434                 }
  435                 if (!ignore) {
  436                         okrate = nrs->rs_rates[i];
  437                         ni->ni_txrate = i;
  438                 }
  439                 i++;
  440         }
  441         if (okrate == 0 || error != 0 ||
  442             ((flags & IEEE80211_F_DOFRATE) && fixedrate == 0))
  443                 return badrate | IEEE80211_RATE_BASIC;
  444         else
  445                 return RV(okrate);
  446 #undef RV
  447 }
  448 
  449 /*
  450  * Reset 11g-related state.
  451  */
  452 void
  453 ieee80211_reset_erp(struct ieee80211com *ic)
  454 {
  455         ic->ic_flags &= ~IEEE80211_F_USEPROT;
  456         ic->ic_nonerpsta = 0;
  457         ic->ic_longslotsta = 0;
  458         /*
  459          * Short slot time is enabled only when operating in 11g
  460          * and not in an IBSS.  We must also honor whether or not
  461          * the driver is capable of doing it.
  462          */
  463         ieee80211_set_shortslottime(ic,
  464                 ic->ic_curmode == IEEE80211_MODE_11A ||
  465                 (ic->ic_curmode == IEEE80211_MODE_11G &&
  466                 ic->ic_opmode == IEEE80211_M_HOSTAP &&
  467                 (ic->ic_caps & IEEE80211_C_SHSLOT)));
  468         /*
  469          * Set short preamble and ERP barker-preamble flags.
  470          */
  471         if (ic->ic_curmode == IEEE80211_MODE_11A ||
  472             (ic->ic_caps & IEEE80211_C_SHPREAMBLE)) {
  473                 ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
  474                 ic->ic_flags &= ~IEEE80211_F_USEBARKER;
  475         } else {
  476                 ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
  477                 ic->ic_flags |= IEEE80211_F_USEBARKER;
  478         }
  479 }
  480 
  481 /*
  482  * Set the short slot time state and notify the driver.
  483  */
  484 void
  485 ieee80211_set_shortslottime(struct ieee80211com *ic, int onoff)
  486 {
  487         if (onoff)
  488                 ic->ic_flags |= IEEE80211_F_SHSLOT;
  489         else
  490                 ic->ic_flags &= ~IEEE80211_F_SHSLOT;
  491         /* notify driver */
  492         if (ic->ic_updateslot != NULL)
  493                 ic->ic_updateslot(ic->ic_ifp);
  494 }
  495 
  496 /*
  497  * Check if the specified rate set supports ERP.
  498  * NB: the rate set is assumed to be sorted.
  499  */
  500 int
  501 ieee80211_iserp_rateset(struct ieee80211com *ic,
  502     struct ieee80211_rateset *rs)
  503 {
  504 #define N(a)    (sizeof(a) / sizeof(a[0]))
  505         static const int rates[] = { 2, 4, 11, 22, 12, 24, 48 };
  506         int i, j;
  507 
  508         if (rs->rs_nrates < N(rates))
  509                 return 0;
  510         for (i = 0; i < N(rates); i++) {
  511                 for (j = 0; j < rs->rs_nrates; j++) {
  512                         int r = rs->rs_rates[j] & IEEE80211_RATE_VAL;
  513                         if (rates[i] == r)
  514                                 goto next;
  515                         if (r > rates[i])
  516                                 return 0;
  517                 }
  518                 return 0;
  519         next:
  520                 ;
  521         }
  522         return 1;
  523 #undef N
  524 }
  525 
  526 /*
  527  * Mark the basic rates for the 11g rate table based on the
  528  * operating mode.  For real 11g we mark all the 11b rates
  529  * and 6, 12, and 24 OFDM.  For 11b compatibility we mark only
  530  * 11b rates.  There's also a pseudo 11a-mode used to mark only
  531  * the basic OFDM rates.
  532  */
  533 void
  534 ieee80211_set11gbasicrates(struct ieee80211_rateset *rs, enum ieee80211_phymode mode)
  535 {
  536         static const struct ieee80211_rateset basic[] = {
  537             { .rs_nrates = 0 },         /* IEEE80211_MODE_AUTO */
  538             { 3, { 12, 24, 48 } },      /* IEEE80211_MODE_11A */
  539             { 2, { 2, 4 } },            /* IEEE80211_MODE_11B */
  540             { 4, { 2, 4, 11, 22 } },    /* IEEE80211_MODE_11G (mixed b/g) */
  541             { .rs_nrates = 0 },         /* IEEE80211_MODE_FH */
  542                                         /* IEEE80211_MODE_PUREG (not yet) */
  543             { 7, { 2, 4, 11, 22, 12, 24, 48 } },
  544         };
  545         int i, j;
  546 
  547         for (i = 0; i < rs->rs_nrates; i++) {
  548                 rs->rs_rates[i] &= IEEE80211_RATE_VAL;
  549                 for (j = 0; j < basic[mode].rs_nrates; j++)
  550                         if (basic[mode].rs_rates[j] == rs->rs_rates[i]) {
  551                                 rs->rs_rates[i] |= IEEE80211_RATE_BASIC;
  552                                 break;
  553                         }
  554         }
  555 }
  556 
  557 /*
  558  * WME protocol support.  The following parameters come from the spec.
  559  */
  560 typedef struct phyParamType {
  561         u_int8_t aifsn; 
  562         u_int8_t logcwmin;
  563         u_int8_t logcwmax; 
  564         u_int16_t txopLimit;
  565         u_int8_t acm;
  566 } paramType;
  567 
  568 static const struct phyParamType phyParamForAC_BE[IEEE80211_MODE_MAX] = {
  569         { 3, 4, 6, 0, 0, },             /* IEEE80211_MODE_AUTO */
  570         { 3, 4, 6, 0, 0, },             /* IEEE80211_MODE_11A */ 
  571         { 3, 5, 7, 0, 0, },             /* IEEE80211_MODE_11B */ 
  572         { 3, 4, 6, 0, 0, },             /* IEEE80211_MODE_11G */ 
  573         { 3, 5, 7, 0, 0, },             /* IEEE80211_MODE_FH */ 
  574         { 2, 3, 5, 0, 0, },             /* IEEE80211_MODE_TURBO_A */ 
  575         { 2, 3, 5, 0, 0, },             /* IEEE80211_MODE_TURBO_G */ 
  576 };
  577 static const struct phyParamType phyParamForAC_BK[IEEE80211_MODE_MAX] = {
  578         { 7, 4, 10, 0, 0, },            /* IEEE80211_MODE_AUTO */
  579         { 7, 4, 10, 0, 0, },            /* IEEE80211_MODE_11A */ 
  580         { 7, 5, 10, 0, 0, },            /* IEEE80211_MODE_11B */ 
  581         { 7, 4, 10, 0, 0, },            /* IEEE80211_MODE_11G */ 
  582         { 7, 5, 10, 0, 0, },            /* IEEE80211_MODE_FH */ 
  583         { 7, 3, 10, 0, 0, },            /* IEEE80211_MODE_TURBO_A */ 
  584         { 7, 3, 10, 0, 0, },            /* IEEE80211_MODE_TURBO_G */ 
  585 };
  586 static const struct phyParamType phyParamForAC_VI[IEEE80211_MODE_MAX] = {
  587         { 1, 3, 4,  94, 0, },   /* IEEE80211_MODE_AUTO */
  588         { 1, 3, 4,  94, 0, },   /* IEEE80211_MODE_11A */ 
  589         { 1, 4, 5, 188, 0, },   /* IEEE80211_MODE_11B */ 
  590         { 1, 3, 4,  94, 0, },   /* IEEE80211_MODE_11G */ 
  591         { 1, 4, 5, 188, 0, },   /* IEEE80211_MODE_FH */ 
  592         { 1, 2, 3,  94, 0, },   /* IEEE80211_MODE_TURBO_A */ 
  593         { 1, 2, 3,  94, 0, },   /* IEEE80211_MODE_TURBO_G */ 
  594 };
  595 static const struct phyParamType phyParamForAC_VO[IEEE80211_MODE_MAX] = {
  596         { 1, 2, 3,  47, 0, },   /* IEEE80211_MODE_AUTO */
  597         { 1, 2, 3,  47, 0, },   /* IEEE80211_MODE_11A */ 
  598         { 1, 3, 4, 102, 0, },   /* IEEE80211_MODE_11B */ 
  599         { 1, 2, 3,  47, 0, },   /* IEEE80211_MODE_11G */ 
  600         { 1, 3, 4, 102, 0, },   /* IEEE80211_MODE_FH */ 
  601         { 1, 2, 2,  47, 0, },   /* IEEE80211_MODE_TURBO_A */ 
  602         { 1, 2, 2,  47, 0, },   /* IEEE80211_MODE_TURBO_G */ 
  603 };
  604 
  605 static const struct phyParamType bssPhyParamForAC_BE[IEEE80211_MODE_MAX] = {
  606         { 3, 4, 10, 0, 0, },            /* IEEE80211_MODE_AUTO */
  607         { 3, 4, 10, 0, 0, },            /* IEEE80211_MODE_11A */ 
  608         { 3, 5, 10, 0, 0, },            /* IEEE80211_MODE_11B */ 
  609         { 3, 4, 10, 0, 0, },            /* IEEE80211_MODE_11G */ 
  610         { 3, 5, 10, 0, 0, },            /* IEEE80211_MODE_FH */ 
  611         { 2, 3, 10, 0, 0, },            /* IEEE80211_MODE_TURBO_A */ 
  612         { 2, 3, 10, 0, 0, },            /* IEEE80211_MODE_TURBO_G */ 
  613 };
  614 static const struct phyParamType bssPhyParamForAC_VI[IEEE80211_MODE_MAX] = {
  615         { 2, 3, 4,  94, 0, },   /* IEEE80211_MODE_AUTO */
  616         { 2, 3, 4,  94, 0, },   /* IEEE80211_MODE_11A */ 
  617         { 2, 4, 5, 188, 0, },   /* IEEE80211_MODE_11B */ 
  618         { 2, 3, 4,  94, 0, },   /* IEEE80211_MODE_11G */ 
  619         { 2, 4, 5, 188, 0, },   /* IEEE80211_MODE_FH */ 
  620         { 2, 2, 3,  94, 0, },   /* IEEE80211_MODE_TURBO_A */ 
  621         { 2, 2, 3,  94, 0, },   /* IEEE80211_MODE_TURBO_G */ 
  622 };
  623 static const struct phyParamType bssPhyParamForAC_VO[IEEE80211_MODE_MAX] = {
  624         { 2, 2, 3,  47, 0, },   /* IEEE80211_MODE_AUTO */
  625         { 2, 2, 3,  47, 0, },   /* IEEE80211_MODE_11A */ 
  626         { 2, 3, 4, 102, 0, },   /* IEEE80211_MODE_11B */ 
  627         { 2, 2, 3,  47, 0, },   /* IEEE80211_MODE_11G */ 
  628         { 2, 3, 4, 102, 0, },   /* IEEE80211_MODE_FH */ 
  629         { 1, 2, 2,  47, 0, },   /* IEEE80211_MODE_TURBO_A */ 
  630         { 1, 2, 2,  47, 0, },   /* IEEE80211_MODE_TURBO_G */ 
  631 };
  632 
  633 void
  634 ieee80211_wme_initparams(struct ieee80211com *ic)
  635 {
  636         struct ieee80211_wme_state *wme = &ic->ic_wme;
  637         const paramType *pPhyParam, *pBssPhyParam;
  638         struct wmeParams *wmep;
  639         int i;
  640 
  641         if ((ic->ic_caps & IEEE80211_C_WME) == 0)
  642                 return;
  643 
  644         for (i = 0; i < WME_NUM_AC; i++) {
  645                 switch (i) {
  646                 case WME_AC_BK:
  647                         pPhyParam = &phyParamForAC_BK[ic->ic_curmode];
  648                         pBssPhyParam = &phyParamForAC_BK[ic->ic_curmode];
  649                         break;
  650                 case WME_AC_VI:
  651                         pPhyParam = &phyParamForAC_VI[ic->ic_curmode];
  652                         pBssPhyParam = &bssPhyParamForAC_VI[ic->ic_curmode];
  653                         break;
  654                 case WME_AC_VO:
  655                         pPhyParam = &phyParamForAC_VO[ic->ic_curmode];
  656                         pBssPhyParam = &bssPhyParamForAC_VO[ic->ic_curmode];
  657                         break;
  658                 case WME_AC_BE:
  659                 default:
  660                         pPhyParam = &phyParamForAC_BE[ic->ic_curmode];
  661                         pBssPhyParam = &bssPhyParamForAC_BE[ic->ic_curmode];
  662                         break;
  663                 }
  664 
  665                 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i];
  666                 if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
  667                         wmep->wmep_acm = pPhyParam->acm;
  668                         wmep->wmep_aifsn = pPhyParam->aifsn;    
  669                         wmep->wmep_logcwmin = pPhyParam->logcwmin;      
  670                         wmep->wmep_logcwmax = pPhyParam->logcwmax;              
  671                         wmep->wmep_txopLimit = pPhyParam->txopLimit;
  672                 } else {
  673                         wmep->wmep_acm = pBssPhyParam->acm;
  674                         wmep->wmep_aifsn = pBssPhyParam->aifsn; 
  675                         wmep->wmep_logcwmin = pBssPhyParam->logcwmin;   
  676                         wmep->wmep_logcwmax = pBssPhyParam->logcwmax;           
  677                         wmep->wmep_txopLimit = pBssPhyParam->txopLimit;
  678 
  679                 }       
  680                 IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
  681                         "%s: %s chan [acm %u aifsn %u log2(cwmin) %u "
  682                         "log2(cwmax) %u txpoLimit %u]\n", __func__
  683                         , ieee80211_wme_acnames[i]
  684                         , wmep->wmep_acm
  685                         , wmep->wmep_aifsn
  686                         , wmep->wmep_logcwmin
  687                         , wmep->wmep_logcwmax
  688                         , wmep->wmep_txopLimit
  689                 );
  690 
  691                 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i];
  692                 wmep->wmep_acm = pBssPhyParam->acm;
  693                 wmep->wmep_aifsn = pBssPhyParam->aifsn; 
  694                 wmep->wmep_logcwmin = pBssPhyParam->logcwmin;   
  695                 wmep->wmep_logcwmax = pBssPhyParam->logcwmax;           
  696                 wmep->wmep_txopLimit = pBssPhyParam->txopLimit;
  697                 IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
  698                         "%s: %s  bss [acm %u aifsn %u log2(cwmin) %u "
  699                         "log2(cwmax) %u txpoLimit %u]\n", __func__
  700                         , ieee80211_wme_acnames[i]
  701                         , wmep->wmep_acm
  702                         , wmep->wmep_aifsn
  703                         , wmep->wmep_logcwmin
  704                         , wmep->wmep_logcwmax
  705                         , wmep->wmep_txopLimit
  706                 );
  707         }
  708         /* NB: check ic_bss to avoid NULL deref on initial attach */
  709         if (ic->ic_bss != NULL) {
  710                 /*
  711                  * Calculate agressive mode switching threshold based
  712                  * on beacon interval.  This doesn't need locking since
  713                  * we're only called before entering the RUN state at
  714                  * which point we start sending beacon frames.
  715                  */
  716                 wme->wme_hipri_switch_thresh =
  717                         (HIGH_PRI_SWITCH_THRESH * ic->ic_bss->ni_intval) / 100;
  718                 ieee80211_wme_updateparams(ic);
  719         }
  720 }
  721 
  722 /*
  723  * Update WME parameters for ourself and the BSS.
  724  */
  725 void
  726 ieee80211_wme_updateparams_locked(struct ieee80211com *ic)
  727 {
  728         static const paramType phyParam[IEEE80211_MODE_MAX] = {
  729                 { 2, 4, 10, 64, 0, },   /* IEEE80211_MODE_AUTO */ 
  730                 { 2, 4, 10, 64, 0, },   /* IEEE80211_MODE_11A */ 
  731                 { 2, 5, 10, 64, 0, },   /* IEEE80211_MODE_11B */ 
  732                 { 2, 4, 10, 64, 0, },   /* IEEE80211_MODE_11G */ 
  733                 { 2, 5, 10, 64, 0, },   /* IEEE80211_MODE_FH */ 
  734                 { 1, 3, 10, 64, 0, },   /* IEEE80211_MODE_TURBO_A */ 
  735                 { 1, 3, 10, 64, 0, },   /* IEEE80211_MODE_TURBO_G */ 
  736         };
  737         struct ieee80211_wme_state *wme = &ic->ic_wme;
  738         const struct wmeParams *wmep;
  739         struct wmeParams *chanp, *bssp;
  740         int i;
  741 
  742         /* set up the channel access parameters for the physical device */
  743         for (i = 0; i < WME_NUM_AC; i++) {
  744                 chanp = &wme->wme_chanParams.cap_wmeParams[i];
  745                 wmep = &wme->wme_wmeChanParams.cap_wmeParams[i];
  746                 chanp->wmep_aifsn = wmep->wmep_aifsn;
  747                 chanp->wmep_logcwmin = wmep->wmep_logcwmin;
  748                 chanp->wmep_logcwmax = wmep->wmep_logcwmax;
  749                 chanp->wmep_txopLimit = wmep->wmep_txopLimit;
  750 
  751                 chanp = &wme->wme_bssChanParams.cap_wmeParams[i];
  752                 wmep = &wme->wme_wmeBssChanParams.cap_wmeParams[i];
  753                 chanp->wmep_aifsn = wmep->wmep_aifsn;
  754                 chanp->wmep_logcwmin = wmep->wmep_logcwmin;
  755                 chanp->wmep_logcwmax = wmep->wmep_logcwmax;
  756                 chanp->wmep_txopLimit = wmep->wmep_txopLimit;
  757         }
  758 
  759         /*
  760          * This implements agressive mode as found in certain
  761          * vendors' AP's.  When there is significant high
  762          * priority (VI/VO) traffic in the BSS throttle back BE
  763          * traffic by using conservative parameters.  Otherwise
  764          * BE uses agressive params to optimize performance of
  765          * legacy/non-QoS traffic.
  766          */
  767         if ((ic->ic_opmode == IEEE80211_M_HOSTAP &&
  768              (wme->wme_flags & WME_F_AGGRMODE) == 0) ||
  769             (ic->ic_opmode != IEEE80211_M_HOSTAP &&
  770              (ic->ic_bss->ni_flags & IEEE80211_NODE_QOS) == 0) ||
  771             (ic->ic_flags & IEEE80211_F_WME) == 0) {
  772                 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE];
  773                 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE];
  774 
  775                 chanp->wmep_aifsn = bssp->wmep_aifsn =
  776                         phyParam[ic->ic_curmode].aifsn;
  777                 chanp->wmep_logcwmin = bssp->wmep_logcwmin =
  778                         phyParam[ic->ic_curmode].logcwmin;
  779                 chanp->wmep_logcwmax = bssp->wmep_logcwmax =
  780                         phyParam[ic->ic_curmode].logcwmax;
  781                 chanp->wmep_txopLimit = bssp->wmep_txopLimit =
  782                         (ic->ic_caps & IEEE80211_C_BURST) ?
  783                                 phyParam[ic->ic_curmode].txopLimit : 0;         
  784                 IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
  785                         "%s: %s [acm %u aifsn %u log2(cwmin) %u "
  786                         "log2(cwmax) %u txpoLimit %u]\n", __func__
  787                         , ieee80211_wme_acnames[WME_AC_BE]
  788                         , chanp->wmep_acm
  789                         , chanp->wmep_aifsn
  790                         , chanp->wmep_logcwmin
  791                         , chanp->wmep_logcwmax
  792                         , chanp->wmep_txopLimit
  793                 );
  794         }
  795         
  796 #ifndef IEEE80211_NO_HOSTAP
  797         if (ic->ic_opmode == IEEE80211_M_HOSTAP &&
  798             ic->ic_sta_assoc < 2 && (wme->wme_flags & WME_F_AGGRMODE) == 0) {
  799                 static const u_int8_t logCwMin[IEEE80211_MODE_MAX] = {
  800                         3,      /* IEEE80211_MODE_AUTO */
  801                         3,      /* IEEE80211_MODE_11A */
  802                         4,      /* IEEE80211_MODE_11B */
  803                         3,      /* IEEE80211_MODE_11G */
  804                         4,      /* IEEE80211_MODE_FH */
  805                         3,      /* IEEE80211_MODE_TURBO_A */
  806                         3,      /* IEEE80211_MODE_TURBO_G */
  807                 };
  808                 chanp = &wme->wme_chanParams.cap_wmeParams[WME_AC_BE];
  809                 bssp = &wme->wme_bssChanParams.cap_wmeParams[WME_AC_BE];
  810 
  811                 chanp->wmep_logcwmin = bssp->wmep_logcwmin = 
  812                         logCwMin[ic->ic_curmode];
  813                 IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
  814                         "%s: %s log2(cwmin) %u\n", __func__
  815                         , ieee80211_wme_acnames[WME_AC_BE]
  816                         , chanp->wmep_logcwmin
  817                 );
  818         }       
  819         if (ic->ic_opmode == IEEE80211_M_HOSTAP) {      /* XXX ibss? */
  820                 /*
  821                  * Arrange for a beacon update and bump the parameter
  822                  * set number so associated stations load the new values.
  823                  */
  824                 wme->wme_bssChanParams.cap_info =
  825                         (wme->wme_bssChanParams.cap_info+1) & WME_QOSINFO_COUNT;
  826                 ic->ic_flags |= IEEE80211_F_WMEUPDATE;
  827         }
  828 #endif /* !IEEE80211_NO_HOSTAP */
  829 
  830         wme->wme_update(ic);
  831 
  832         IEEE80211_DPRINTF(ic, IEEE80211_MSG_WME,
  833                 "%s: WME params updated, cap_info 0x%x\n", __func__,
  834                 ic->ic_opmode == IEEE80211_M_STA ?
  835                         wme->wme_wmeChanParams.cap_info :
  836                         wme->wme_bssChanParams.cap_info);
  837 }
  838 
  839 void
  840 ieee80211_wme_updateparams(struct ieee80211com *ic)
  841 {
  842 
  843         if (ic->ic_caps & IEEE80211_C_WME) {
  844                 IEEE80211_BEACON_LOCK(ic);
  845                 ieee80211_wme_updateparams_locked(ic);
  846                 IEEE80211_BEACON_UNLOCK(ic);
  847         }
  848 }
  849 
  850 #ifndef IEEE80211_NO_HOSTAP
  851 static void
  852 sta_disassoc(void *arg, struct ieee80211_node *ni)
  853 {
  854         struct ieee80211com *ic = arg;
  855 
  856         if (ni->ni_associd != 0) {
  857                 IEEE80211_SEND_MGMT(ic, ni, IEEE80211_FC0_SUBTYPE_DISASSOC,
  858                         IEEE80211_REASON_ASSOC_LEAVE);
  859                 ieee80211_node_leave(ic, ni);
  860         }
  861 }
  862 #endif /* !IEEE80211_NO_HOSTAP */
  863 
  864 void
  865 ieee80211_beacon_miss(struct ieee80211com *ic)
  866 {
  867 
  868         if (ic->ic_flags & IEEE80211_F_SCAN) {
  869                 /* XXX check ic_curchan != ic_bsschan? */
  870                 return;
  871         }
  872         IEEE80211_DPRINTF(ic,
  873                 IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
  874                 "%s\n", "beacon miss");
  875 
  876         /*
  877          * Our handling is only meaningful for stations that are
  878          * associated; any other conditions else will be handled
  879          * through different means (e.g. the tx timeout on mgt frames).
  880          */
  881         if (ic->ic_opmode != IEEE80211_M_STA || ic->ic_state != IEEE80211_S_RUN)
  882                 return;
  883 
  884         if (++ic->ic_bmiss_count < ic->ic_bmiss_max) {
  885                 /*
  886                  * Send a directed probe req before falling back to a scan;
  887                  * if we receive a response ic_bmiss_count will be reset.
  888                  * Some cards mistakenly report beacon miss so this avoids
  889                  * the expensive scan if the ap is still there.
  890                  */
  891                 ieee80211_send_probereq(ic->ic_bss, ic->ic_myaddr,
  892                         ic->ic_bss->ni_bssid, ic->ic_bss->ni_bssid,
  893                         ic->ic_bss->ni_essid, ic->ic_bss->ni_esslen,
  894                         ic->ic_opt_ie, ic->ic_opt_ie_len);
  895                 return;
  896         }
  897         ic->ic_bmiss_count = 0;
  898         ieee80211_new_state(ic, IEEE80211_S_SCAN, 0);
  899 }
  900 
  901 #ifndef IEEE80211_NO_HOSTAP
  902 static void
  903 sta_deauth(void *arg, struct ieee80211_node *ni)
  904 {
  905         struct ieee80211com *ic = arg;
  906 
  907         IEEE80211_SEND_MGMT(ic, ni, IEEE80211_FC0_SUBTYPE_DEAUTH,
  908                 IEEE80211_REASON_ASSOC_LEAVE);
  909 }
  910 #endif /* !IEEE80211_NO_HOSTAP */
  911 
  912 static int
  913 ieee80211_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg)
  914 {
  915         struct ifnet *ifp = ic->ic_ifp;
  916         struct ieee80211_node *ni;
  917         enum ieee80211_state ostate;
  918 
  919         ostate = ic->ic_state;
  920         IEEE80211_DPRINTF(ic, IEEE80211_MSG_STATE, "%s: %s -> %s\n", __func__,
  921                 ieee80211_state_name[ostate], ieee80211_state_name[nstate]);
  922         ic->ic_state = nstate;                  /* state transition */
  923         ni = ic->ic_bss;                        /* NB: no reference held */
  924         switch (nstate) {
  925         case IEEE80211_S_INIT:
  926                 switch (ostate) {
  927                 case IEEE80211_S_INIT:
  928                         break;
  929                 case IEEE80211_S_RUN:
  930                         switch (ic->ic_opmode) {
  931                         case IEEE80211_M_STA:
  932                                 IEEE80211_SEND_MGMT(ic, ni,
  933                                     IEEE80211_FC0_SUBTYPE_DISASSOC,
  934                                     IEEE80211_REASON_ASSOC_LEAVE);
  935                                 ieee80211_sta_leave(ic, ni);
  936                                 break;
  937                         case IEEE80211_M_HOSTAP:
  938 #ifndef IEEE80211_NO_HOSTAP
  939                                 ieee80211_iterate_nodes(&ic->ic_sta,
  940                                         sta_disassoc, ic);
  941 #endif /* !IEEE80211_NO_HOSTAP */
  942                                 break;
  943                         default:
  944                                 break;
  945                         }
  946                         goto reset;
  947                 case IEEE80211_S_ASSOC:
  948                         switch (ic->ic_opmode) {
  949                         case IEEE80211_M_STA:
  950                                 IEEE80211_SEND_MGMT(ic, ni,
  951                                     IEEE80211_FC0_SUBTYPE_DEAUTH,
  952                                     IEEE80211_REASON_AUTH_LEAVE);
  953                                 break;
  954                         case IEEE80211_M_HOSTAP:
  955 #ifndef IEEE80211_NO_HOSTAP
  956                                 ieee80211_iterate_nodes(&ic->ic_sta,
  957                                         sta_deauth, ic);
  958 #endif /* !IEEE80211_NO_HOSTAP */
  959                                 break;
  960                         default:
  961                                 break;
  962                         }
  963                         goto reset;
  964                 case IEEE80211_S_SCAN:
  965                         ieee80211_cancel_scan(ic);
  966                         goto reset;
  967                 case IEEE80211_S_AUTH:
  968                 reset:
  969                         ic->ic_mgt_timer = 0;
  970                         ieee80211_drain_ifq(&ic->ic_mgtq);
  971                         ieee80211_reset_bss(ic);
  972                         break;
  973                 }
  974                 if (ic->ic_auth->ia_detach != NULL)
  975                         ic->ic_auth->ia_detach(ic);
  976                 break;
  977         case IEEE80211_S_SCAN:
  978                 switch (ostate) {
  979                 case IEEE80211_S_INIT:
  980                         if ((ic->ic_opmode == IEEE80211_M_HOSTAP ||
  981                              ic->ic_opmode == IEEE80211_M_IBSS ||
  982                              ic->ic_opmode == IEEE80211_M_AHDEMO) &&
  983                             ic->ic_des_chan != IEEE80211_CHAN_ANYC) {
  984                                 /*
  985                                  * AP operation and we already have a channel;
  986                                  * bypass the scan and startup immediately.
  987                                  */
  988                                 ieee80211_create_ibss(ic, ic->ic_des_chan);
  989                         } else {
  990                                 ieee80211_begin_scan(ic, arg);
  991                         }
  992                         break;
  993                 case IEEE80211_S_SCAN:
  994                         /*
  995                          * Scan next. If doing an active scan probe
  996                          * for the requested ap (if any).
  997                          */
  998                         if (ic->ic_flags & IEEE80211_F_ASCAN)
  999                                 ieee80211_probe_curchan(ic, 0);
 1000                         break;
 1001                 case IEEE80211_S_RUN:
 1002                         /* beacon miss */
 1003                         IEEE80211_DPRINTF(ic, IEEE80211_MSG_STATE,
 1004                                 "no recent beacons from %s; rescanning\n",
 1005                                 ether_sprintf(ic->ic_bss->ni_bssid));
 1006                         ieee80211_sta_leave(ic, ni);
 1007                         ic->ic_flags &= ~IEEE80211_F_SIBSS;     /* XXX */
 1008                         /* FALLTHRU */
 1009                 case IEEE80211_S_AUTH:
 1010                 case IEEE80211_S_ASSOC:
 1011                         /* timeout restart scan */
 1012                         ni = ieee80211_find_node(&ic->ic_scan,
 1013                                 ic->ic_bss->ni_macaddr);
 1014                         if (ni != NULL) {
 1015                                 ni->ni_fails++;
 1016                                 ieee80211_unref_node(&ni);
 1017                         }
 1018                         if (ic->ic_roaming == IEEE80211_ROAMING_AUTO)
 1019                                 ieee80211_begin_scan(ic, arg);
 1020                         break;
 1021                 }
 1022                 break;
 1023         case IEEE80211_S_AUTH:
 1024                 switch (ostate) {
 1025                 case IEEE80211_S_INIT:
 1026                 case IEEE80211_S_SCAN:
 1027                         IEEE80211_SEND_MGMT(ic, ni,
 1028                             IEEE80211_FC0_SUBTYPE_AUTH, 1);
 1029                         break;
 1030                 case IEEE80211_S_AUTH:
 1031                 case IEEE80211_S_ASSOC:
 1032                         switch (arg) {
 1033                         case IEEE80211_FC0_SUBTYPE_AUTH:
 1034                                 /* ??? */
 1035                                 IEEE80211_SEND_MGMT(ic, ni,
 1036                                     IEEE80211_FC0_SUBTYPE_AUTH, 2);
 1037                                 break;
 1038                         case IEEE80211_FC0_SUBTYPE_DEAUTH:
 1039                                 /* ignore and retry scan on timeout */
 1040                                 break;
 1041                         }
 1042                         break;
 1043                 case IEEE80211_S_RUN:
 1044                         switch (arg) {
 1045                         case IEEE80211_FC0_SUBTYPE_AUTH:
 1046                                 IEEE80211_SEND_MGMT(ic, ni,
 1047                                     IEEE80211_FC0_SUBTYPE_AUTH, 2);
 1048                                 ic->ic_state = ostate;  /* stay RUN */
 1049                                 break;
 1050                         case IEEE80211_FC0_SUBTYPE_DEAUTH:
 1051                                 ieee80211_sta_leave(ic, ni);
 1052                                 if (ic->ic_roaming == IEEE80211_ROAMING_AUTO) {
 1053                                         /* try to reauth */
 1054                                         IEEE80211_SEND_MGMT(ic, ni,
 1055                                             IEEE80211_FC0_SUBTYPE_AUTH, 1);
 1056                                 }
 1057                                 break;
 1058                         }
 1059                         break;
 1060                 }
 1061                 break;
 1062         case IEEE80211_S_ASSOC:
 1063                 switch (ostate) {
 1064                 case IEEE80211_S_INIT:
 1065                 case IEEE80211_S_SCAN:
 1066                 case IEEE80211_S_ASSOC:
 1067                         IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY,
 1068                                 "%s: invalid transition\n", __func__);
 1069                         break;
 1070                 case IEEE80211_S_AUTH:
 1071                         IEEE80211_SEND_MGMT(ic, ni,
 1072                             IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0);
 1073                         break;
 1074                 case IEEE80211_S_RUN:
 1075                         ieee80211_sta_leave(ic, ni);
 1076                         if (ic->ic_roaming == IEEE80211_ROAMING_AUTO) {
 1077                                 IEEE80211_SEND_MGMT(ic, ni,
 1078                                     IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 1);
 1079                         }
 1080                         break;
 1081                 }
 1082                 break;
 1083         case IEEE80211_S_RUN:
 1084                 if (ic->ic_flags & IEEE80211_F_WPA) {
 1085                         /* XXX validate prerequisites */
 1086                 }
 1087                 switch (ostate) {
 1088                 case IEEE80211_S_INIT:
 1089                         if (ic->ic_opmode == IEEE80211_M_MONITOR)
 1090                                 break;
 1091                         /* fall thru... */
 1092                 case IEEE80211_S_AUTH:
 1093                         IEEE80211_DPRINTF(ic, IEEE80211_MSG_ANY,
 1094                                 "%s: invalid transition\n", __func__);
 1095                         /* fall thru... */
 1096                 case IEEE80211_S_RUN:
 1097                         break;
 1098                 case IEEE80211_S_SCAN:          /* adhoc/hostap mode */
 1099                 case IEEE80211_S_ASSOC:         /* infra mode */
 1100                         IASSERT(ni->ni_txrate < ni->ni_rates.rs_nrates,
 1101                                 ("%s: bogus xmit rate %u setup\n", __func__,
 1102                                         ni->ni_txrate));
 1103 #ifdef IEEE80211_DEBUG
 1104                         if (ieee80211_msg_debug(ic)) {
 1105                                 if (ic->ic_opmode == IEEE80211_M_STA)
 1106                                         if_printf(ifp, "associated ");
 1107                                 else
 1108                                         if_printf(ifp, "synchronized ");
 1109                                 printf("with %s ssid ",
 1110                                     ether_sprintf(ni->ni_bssid));
 1111                                 ieee80211_print_essid(ic->ic_bss->ni_essid,
 1112                                     ni->ni_esslen);
 1113                                 printf(" channel %d start %uMb\n",
 1114                                         ieee80211_chan2ieee(ic, ic->ic_curchan),
 1115                                         IEEE80211_RATE2MBS(ni->ni_rates.rs_rates[ni->ni_txrate]));
 1116                         }
 1117 #endif
 1118                         ic->ic_mgt_timer = 0;
 1119                         if (ic->ic_opmode == IEEE80211_M_STA)
 1120                                 ieee80211_notify_node_join(ic, ni, 
 1121                                         arg == IEEE80211_FC0_SUBTYPE_ASSOC_RESP);
 1122                         (*ifp->if_start)(ifp);  /* XXX not authorized yet */
 1123                         break;
 1124                 }
 1125                 /*
 1126                  * Start/stop the authenticator when operating as an
 1127                  * AP.  We delay until here to allow configuration to
 1128                  * happen out of order.
 1129                  */
 1130                 if (ic->ic_opmode == IEEE80211_M_HOSTAP && /* XXX IBSS/AHDEMO */
 1131                     ic->ic_auth->ia_attach != NULL) {
 1132                         /* XXX check failure */
 1133                         ic->ic_auth->ia_attach(ic);
 1134                 } else if (ic->ic_auth->ia_detach != NULL) {
 1135                         ic->ic_auth->ia_detach(ic);
 1136                 }
 1137                 /*
 1138                  * When 802.1x is not in use mark the port authorized
 1139                  * at this point so traffic can flow.
 1140                  */
 1141                 if (ni->ni_authmode != IEEE80211_AUTH_8021X)
 1142                         ieee80211_node_authorize(ni);
 1143                 /*
 1144                  * Enable inactivity processing.
 1145                  * XXX
 1146                  */
 1147                 ic->ic_scan.nt_inact_timer = IEEE80211_INACT_WAIT;
 1148                 ic->ic_sta.nt_inact_timer = IEEE80211_INACT_WAIT;
 1149                 break;
 1150         }
 1151         return 0;
 1152 }

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