sys/netproto/802_11/wlan/ieee80211_sta.c

   1 /*-
   2  * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  17  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  18  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  19  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  21  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  *
  25  * $FreeBSD: head/sys/net80211/ieee80211_sta.c 203422 2010-02-03 10:07:43Z rpaulo $
  26  * $DragonFly$
  27  */
  28
  29 /*
  30  * IEEE 802.11 Station mode support.
  31  */
  32 #include "opt_inet.h"
  33 #include "opt_wlan.h"
  34
  35 #include <sys/param.h>
  36 #include <sys/systm.h>
  37 #include <sys/mbuf.h>
  38 #include <sys/malloc.h>
  39 #include <sys/kernel.h>
  40
  41 #include <sys/socket.h>
  42 #include <sys/sockio.h>
  43 #include <sys/endian.h>
  44 #include <sys/errno.h>
  45 #include <sys/proc.h>
  46 #include <sys/sysctl.h>
  47
  48 #include <net/if.h>
  49 #include <net/if_media.h>
  50 #include <net/if_llc.h>
  51 #include <net/ethernet.h>
  52 #include <net/route.h>
  53
  54 #include <net/bpf.h>
  55
  56 #include <netproto/802_11/ieee80211_var.h>
  57 #include <netproto/802_11/ieee80211_sta.h>
  58 #include <netproto/802_11/ieee80211_input.h>
  59 #ifdef IEEE80211_SUPPORT_SUPERG
  60 #include <netproto/802_11/ieee80211_superg.h>
  61 #endif
  62
  63 #define IEEE80211_RATE2MBS(r)   (((r) & IEEE80211_RATE_VAL) / 2)
  64
  65 static  void sta_vattach(struct ieee80211vap *);
  66 static  void sta_beacon_miss(struct ieee80211vap *);
  67 static  int sta_newstate(struct ieee80211vap *, enum ieee80211_state, int);
  68 static  int sta_input(struct ieee80211_node *, struct mbuf *, int, int);
  69 static void sta_recv_mgmt(struct ieee80211_node *, struct mbuf *,
  70             int subtype, int rssi, int nf);
  71 static void sta_recv_ctl(struct ieee80211_node *, struct mbuf *, int subtype);
  72
  73 void
  74 ieee80211_sta_attach(struct ieee80211com *ic)
  75 {
  76         ic->ic_vattach[IEEE80211_M_STA] = sta_vattach;
  77 }
  78
  79 void
  80 ieee80211_sta_detach(struct ieee80211com *ic)
  81 {
  82 }
  83
  84 static void
  85 sta_vdetach(struct ieee80211vap *vap)
  86 {
  87 }
  88
  89 static void
  90 sta_vattach(struct ieee80211vap *vap)
  91 {
  92         vap->iv_newstate = sta_newstate;
  93         vap->iv_input = sta_input;
  94         vap->iv_recv_mgmt = sta_recv_mgmt;
  95         vap->iv_recv_ctl = sta_recv_ctl;
  96         vap->iv_opdetach = sta_vdetach;
  97         vap->iv_bmiss = sta_beacon_miss;
  98 }
  99
 100 /*
 101  * Handle a beacon miss event.  The common code filters out
 102  * spurious events that can happen when scanning and/or before
 103  * reaching RUN state.
 104  */
 105 static void
 106 sta_beacon_miss(struct ieee80211vap *vap)
 107 {
 108         struct ieee80211com *ic = vap->iv_ic;
 109
 110         KASSERT((ic->ic_flags & IEEE80211_F_SCAN) == 0, ("scanning"));
 111         KASSERT(vap->iv_state >= IEEE80211_S_RUN,
 112             ("wrong state %s", ieee80211_state_name[vap->iv_state]));
 113
 114         IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
 115             "beacon miss, mode %s state %s\n",
 116             ieee80211_opmode_name[vap->iv_opmode],
 117             ieee80211_state_name[vap->iv_state]);
 118
 119         if (vap->iv_state == IEEE80211_S_CSA) {
 120                 /*
 121                  * A Channel Switch is pending; assume we missed the
 122                  * beacon that would've completed the process and just
 123                  * force the switch.  If we made a mistake we'll not
 124                  * find the AP on the new channel and fall back to a
 125                  * normal scan.
 126                  */
 127                 ieee80211_csa_completeswitch(ic);
 128                 return;
 129         }
 130         if (++vap->iv_bmiss_count < vap->iv_bmiss_max) {
 131                 /*
 132                  * Send a directed probe req before falling back to a
 133                  * scan; if we receive a response ic_bmiss_count will
 134                  * be reset.  Some cards mistakenly report beacon miss
 135                  * so this avoids the expensive scan if the ap is
 136                  * still there.
 137                  */
 138                 ieee80211_send_probereq(vap->iv_bss, vap->iv_myaddr,
 139                         vap->iv_bss->ni_bssid, vap->iv_bss->ni_bssid,
 140                         vap->iv_bss->ni_essid, vap->iv_bss->ni_esslen);
 141                 return;
 142         }
 143         vap->iv_bmiss_count = 0;
 144         vap->iv_stats.is_beacon_miss++;
 145         if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) {
 146 #ifdef IEEE80211_SUPPORT_SUPERG
 147                 struct ieee80211com *ic = vap->iv_ic;
 148
 149                 /*
 150                  * If we receive a beacon miss interrupt when using
 151                  * dynamic turbo, attempt to switch modes before
 152                  * reassociating.
 153                  */
 154                 if (IEEE80211_ATH_CAP(vap, vap->iv_bss, IEEE80211_NODE_TURBOP))
 155                         ieee80211_dturbo_switch(vap,
 156                             ic->ic_bsschan->ic_flags ^ IEEE80211_CHAN_TURBO);
 157 #endif
 158                 /*
 159                  * Try to reassociate before scanning for a new ap.
 160                  */
 161                 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1);
 162         } else {
 163                 /*
 164                  * Somebody else is controlling state changes (e.g.
 165                  * a user-mode app) don't do anything that would
 166                  * confuse them; just drop into scan mode so they'll
 167                  * notified of the state change and given control.
 168                  */
 169                 ieee80211_new_state(vap, IEEE80211_S_SCAN, 0);
 170         }
 171 }
 172
 173 /*
 174  * Handle deauth with reason.  We retry only for
 175  * the cases where we might succeed.  Otherwise
 176  * we downgrade the ap and scan.
 177  */
 178 static void
 179 sta_authretry(struct ieee80211vap *vap, struct ieee80211_node *ni, int reason)
 180 {
 181         switch (reason) {
 182         case IEEE80211_STATUS_SUCCESS:          /* NB: MLME assoc */
 183         case IEEE80211_STATUS_TIMEOUT:
 184         case IEEE80211_REASON_ASSOC_EXPIRE:
 185         case IEEE80211_REASON_NOT_AUTHED:
 186         case IEEE80211_REASON_NOT_ASSOCED:
 187         case IEEE80211_REASON_ASSOC_LEAVE:
 188         case IEEE80211_REASON_ASSOC_NOT_AUTHED:
 189                 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, 1);
 190                 break;
 191         default:
 192                 ieee80211_scan_assoc_fail(vap, vap->iv_bss->ni_macaddr, reason);
 193                 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO)
 194                         ieee80211_check_scan_current(vap);
 195                 break;
 196         }
 197 }
 198
 199 /*
 200  * IEEE80211_M_STA vap state machine handler.
 201  * This routine handles the main states in the 802.11 protocol.
 202  */
 203 static int
 204 sta_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
 205 {
 206         struct ieee80211com *ic = vap->iv_ic;
 207         struct ieee80211_node *ni;
 208         enum ieee80211_state ostate;
 209
 210         IEEE80211_LOCK_ASSERT(ic);
 211
 212         ostate = vap->iv_state;
 213         IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
 214             __func__, ieee80211_state_name[ostate],
 215             ieee80211_state_name[nstate], arg);
 216         vap->iv_state = nstate;                 /* state transition */
 217         callout_stop(&vap->iv_mgtsend);         /* XXX callout_drain */
 218         if (ostate != IEEE80211_S_SCAN)
 219                 ieee80211_cancel_scan(vap);     /* background scan */
 220         ni = vap->iv_bss;                       /* NB: no reference held */
 221         if (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS)
 222                 callout_stop(&vap->iv_swbmiss);
 223         switch (nstate) {
 224         case IEEE80211_S_INIT:
 225                 switch (ostate) {
 226                 case IEEE80211_S_SLEEP:
 227                         /* XXX wakeup */
 228                 case IEEE80211_S_RUN:
 229                         IEEE80211_SEND_MGMT(ni,
 230                             IEEE80211_FC0_SUBTYPE_DISASSOC,
 231                             IEEE80211_REASON_ASSOC_LEAVE);
 232                         ieee80211_sta_leave(ni);
 233                         break;
 234                 case IEEE80211_S_ASSOC:
 235                         IEEE80211_SEND_MGMT(ni,
 236                             IEEE80211_FC0_SUBTYPE_DEAUTH,
 237                             IEEE80211_REASON_AUTH_LEAVE);
 238                         break;
 239                 case IEEE80211_S_SCAN:
 240                         ieee80211_cancel_scan(vap);
 241                         break;
 242                 default:
 243                         goto invalid;
 244                 }
 245                 if (ostate != IEEE80211_S_INIT) {
 246                         /* NB: optimize INIT -> INIT case */
 247                         ieee80211_reset_bss(vap);
 248                 }
 249                 if (vap->iv_auth->ia_detach != NULL)
 250                         vap->iv_auth->ia_detach(vap);
 251                 break;
 252         case IEEE80211_S_SCAN:
 253                 switch (ostate) {
 254                 case IEEE80211_S_INIT:
 255                         /*
 256                          * Initiate a scan.  We can come here as a result
 257                          * of an IEEE80211_IOC_SCAN_REQ too in which case
 258                          * the vap will be marked with IEEE80211_FEXT_SCANREQ
 259                          * and the scan request parameters will be present
 260                          * in iv_scanreq.  Otherwise we do the default.
 261                          */
 262                         if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
 263                                 ieee80211_check_scan(vap,
 264                                     vap->iv_scanreq_flags,
 265                                     vap->iv_scanreq_duration,
 266                                     vap->iv_scanreq_mindwell,
 267                                     vap->iv_scanreq_maxdwell,
 268                                     vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
 269                                 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
 270                         } else
 271                                 ieee80211_check_scan_current(vap);
 272                         break;
 273                 case IEEE80211_S_SCAN:
 274                 case IEEE80211_S_AUTH:
 275                 case IEEE80211_S_ASSOC:
 276                         /*
 277                          * These can happen either because of a timeout
 278                          * on an assoc/auth response or because of a
 279                          * change in state that requires a reset.  For
 280                          * the former we're called with a non-zero arg
 281                          * that is the cause for the failure; pass this
 282                          * to the scan code so it can update state.
 283                          * Otherwise trigger a new scan unless we're in
 284                          * manual roaming mode in which case an application
 285                          * must issue an explicit scan request.
 286                          */
 287                         if (arg != 0)
 288                                 ieee80211_scan_assoc_fail(vap,
 289                                         vap->iv_bss->ni_macaddr, arg);
 290                         if (vap->iv_roaming == IEEE80211_ROAMING_AUTO)
 291                                 ieee80211_check_scan_current(vap);
 292                         break;
 293                 case IEEE80211_S_RUN:           /* beacon miss */
 294                         /*
 295                          * Beacon miss.  Notify user space and if not
 296                          * under control of a user application (roaming
 297                          * manual) kick off a scan to re-connect.
 298                          */
 299                         ieee80211_sta_leave(ni);
 300                         if (vap->iv_roaming == IEEE80211_ROAMING_AUTO)
 301                                 ieee80211_check_scan_current(vap);
 302                         break;
 303                 default:
 304                         goto invalid;
 305                 }
 306                 break;
 307         case IEEE80211_S_AUTH:
 308                 switch (ostate) {
 309                 case IEEE80211_S_INIT:
 310                 case IEEE80211_S_SCAN:
 311                         IEEE80211_SEND_MGMT(ni,
 312                             IEEE80211_FC0_SUBTYPE_AUTH, 1);
 313                         break;
 314                 case IEEE80211_S_AUTH:
 315                 case IEEE80211_S_ASSOC:
 316                         switch (arg & 0xff) {
 317                         case IEEE80211_FC0_SUBTYPE_AUTH:
 318                                 /* ??? */
 319                                 IEEE80211_SEND_MGMT(ni,
 320                                     IEEE80211_FC0_SUBTYPE_AUTH, 2);
 321                                 break;
 322                         case IEEE80211_FC0_SUBTYPE_DEAUTH:
 323                                 sta_authretry(vap, ni, arg>>8);
 324                                 break;
 325                         }
 326                         break;
 327                 case IEEE80211_S_RUN:
 328                         switch (arg & 0xff) {
 329                         case IEEE80211_FC0_SUBTYPE_AUTH:
 330                                 IEEE80211_SEND_MGMT(ni,
 331                                     IEEE80211_FC0_SUBTYPE_AUTH, 2);
 332                                 vap->iv_state = ostate; /* stay RUN */
 333                                 break;
 334                         case IEEE80211_FC0_SUBTYPE_DEAUTH:
 335                                 ieee80211_sta_leave(ni);
 336                                 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) {
 337                                         /* try to reauth */
 338                                         IEEE80211_SEND_MGMT(ni,
 339                                             IEEE80211_FC0_SUBTYPE_AUTH, 1);
 340                                 }
 341                                 break;
 342                         }
 343                         break;
 344                 default:
 345                         goto invalid;
 346                 }
 347                 break;
 348         case IEEE80211_S_ASSOC:
 349                 switch (ostate) {
 350                 case IEEE80211_S_AUTH:
 351                 case IEEE80211_S_ASSOC:
 352                         IEEE80211_SEND_MGMT(ni,
 353                             IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0);
 354                         break;
 355                 case IEEE80211_S_SLEEP:         /* cannot happen */
 356                 case IEEE80211_S_RUN:
 357                         ieee80211_sta_leave(ni);
 358                         if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) {
 359                                 IEEE80211_SEND_MGMT(ni, arg ?
 360                                     IEEE80211_FC0_SUBTYPE_REASSOC_REQ :
 361                                     IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0);
 362                         }
 363                         break;
 364                 default:
 365                         goto invalid;
 366                 }
 367                 break;
 368         case IEEE80211_S_RUN:
 369                 if (vap->iv_flags & IEEE80211_F_WPA) {
 370                         /* XXX validate prerequisites */
 371                 }
 372                 switch (ostate) {
 373                 case IEEE80211_S_RUN:
 374                 case IEEE80211_S_CSA:
 375                         break;
 376                 case IEEE80211_S_AUTH:          /* when join is done in fw */
 377                 case IEEE80211_S_ASSOC:
 378 #ifdef IEEE80211_DEBUG
 379                         if (ieee80211_msg_debug(vap)) {
 380                                 ieee80211_note(vap, "%s with %6D ssid ",
 381                                     (vap->iv_opmode == IEEE80211_M_STA ?
 382                                     "associated" : "synchronized"),
 383                                     ni->ni_bssid, ":");
 384                                 ieee80211_print_essid(vap->iv_bss->ni_essid,
 385                                     ni->ni_esslen);
 386                                 /* XXX MCS/HT */
 387                                 kprintf(" channel %d start %uMb\n",
 388                                     ieee80211_chan2ieee(ic, ic->ic_curchan),
 389                                     IEEE80211_RATE2MBS(ni->ni_txrate));
 390                         }
 391 #endif
 392                         ieee80211_scan_assoc_success(vap, ni->ni_macaddr);
 393                         ieee80211_notify_node_join(ni,
 394                             arg == IEEE80211_FC0_SUBTYPE_ASSOC_RESP);
 395                         break;
 396                 case IEEE80211_S_SLEEP:
 397                         ieee80211_sta_pwrsave(vap, 0);
 398                         break;
 399                 default:
 400                         goto invalid;
 401                 }
 402                 ieee80211_sync_curchan(ic);
 403                 if (ostate != IEEE80211_S_RUN &&
 404                     (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS)) {
 405                         /*
 406                          * Start s/w beacon miss timer for devices w/o
 407                          * hardware support.  We fudge a bit here since
 408                          * we're doing this in software.
 409                          */
 410                         vap->iv_swbmiss_period = IEEE80211_TU_TO_TICKS(
 411                                 2 * vap->iv_bmissthreshold * ni->ni_intval);
 412                         vap->iv_swbmiss_count = 0;
 413                         callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period,
 414                                 ieee80211_swbmiss, vap);
 415                 }
 416                 /*
 417                  * When 802.1x is not in use mark the port authorized
 418                  * at this point so traffic can flow.
 419                  */
 420                 if (ni->ni_authmode != IEEE80211_AUTH_8021X)
 421                         ieee80211_node_authorize(ni);
 422                 /*
 423                  * Fake association when joining an existing bss.
 424                  */
 425                 if (ic->ic_newassoc != NULL)
 426                         ic->ic_newassoc(vap->iv_bss, ostate != IEEE80211_S_RUN);
 427                 break;
 428         case IEEE80211_S_CSA:
 429                 if (ostate != IEEE80211_S_RUN)
 430                         goto invalid;
 431                 break;
 432         case IEEE80211_S_SLEEP:
 433                 ieee80211_sta_pwrsave(vap, 1);
 434                 break;
 435         default:
 436         invalid:
 437                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
 438                     "%s: unexpected state transition %s -> %s\n", __func__,
 439                     ieee80211_state_name[ostate], ieee80211_state_name[nstate]);
 440                 break;
 441         }
 442         return 0;
 443 }
 444
 445 /*
 446  * Return non-zero if the frame is an echo of a multicast
 447  * frame sent by ourself.  The dir is known to be DSTODS.
 448  */
 449 static __inline int
 450 isdstods_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh)
 451 {
 452 #define QWH4(wh)        ((const struct ieee80211_qosframe_addr4 *)wh)
 453 #define WH4(wh)         ((const struct ieee80211_frame_addr4 *)wh)
 454         const uint8_t *sa;
 455
 456         KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode"));
 457
 458         if (!IEEE80211_IS_MULTICAST(wh->i_addr3))
 459                 return 0;
 460         sa = IEEE80211_QOS_HAS_SEQ(wh) ? QWH4(wh)->i_addr4 : WH4(wh)->i_addr4;
 461         return IEEE80211_ADDR_EQ(sa, vap->iv_myaddr);
 462 #undef WH4
 463 #undef QWH4
 464 }
 465
 466 /*
 467  * Return non-zero if the frame is an echo of a multicast
 468  * frame sent by ourself.  The dir is known to be FROMDS.
 469  */
 470 static __inline int
 471 isfromds_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh)
 472 {
 473         KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode"));
 474
 475         if (!IEEE80211_IS_MULTICAST(wh->i_addr1))
 476                 return 0;
 477         return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
 478 }
 479
 480 /*
 481  * Decide if a received management frame should be
 482  * printed when debugging is enabled.  This filters some
 483  * of the less interesting frames that come frequently
 484  * (e.g. beacons).
 485  */
 486 static __inline int
 487 doprint(struct ieee80211vap *vap, int subtype)
 488 {
 489         switch (subtype) {
 490         case IEEE80211_FC0_SUBTYPE_BEACON:
 491                 return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN);
 492         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
 493                 return 0;
 494         }
 495         return 1;
 496 }
 497
 498 /*
 499  * Process a received frame.  The node associated with the sender
 500  * should be supplied.  If nothing was found in the node table then
 501  * the caller is assumed to supply a reference to iv_bss instead.
 502  * The RSSI and a timestamp are also supplied.  The RSSI data is used
 503  * during AP scanning to select a AP to associate with; it can have
 504  * any units so long as values have consistent units and higher values
 505  * mean ``better signal''.  The receive timestamp is currently not used
 506  * by the 802.11 layer.
 507  */
 508 static int
 509 sta_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf)
 510 {
 511 #define SEQ_LEQ(a,b)    ((int)((a)-(b)) <= 0)
 512 #define HAS_SEQ(type)   ((type & 0x4) == 0)
 513         struct ieee80211vap *vap = ni->ni_vap;
 514         struct ieee80211com *ic = ni->ni_ic;
 515         struct ifnet *ifp = vap->iv_ifp;
 516         struct ieee80211_frame *wh;
 517         struct ieee80211_key *key;
 518         struct ether_header *eh;
 519         int hdrspace, need_tap = 1;     /* mbuf need to be tapped. */
 520         uint8_t dir, type, subtype, qos;
 521         uint8_t *bssid;
 522         uint16_t rxseq;
 523
 524         if (m->m_flags & M_AMPDU_MPDU) {
 525                 /*
 526                  * Fastpath for A-MPDU reorder q resubmission.  Frames
 527                  * w/ M_AMPDU_MPDU marked have already passed through
 528                  * here but were received out of order and been held on
 529                  * the reorder queue.  When resubmitted they are marked
 530                  * with the M_AMPDU_MPDU flag and we can bypass most of
 531                  * the normal processing.
 532                  */
 533                 wh = mtod(m, struct ieee80211_frame *);
 534                 type = IEEE80211_FC0_TYPE_DATA;
 535                 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
 536                 subtype = IEEE80211_FC0_SUBTYPE_QOS;
 537                 hdrspace = ieee80211_hdrspace(ic, wh);  /* XXX optimize? */
 538                 goto resubmit_ampdu;
 539         }
 540
 541         KASSERT(ni != NULL, ("null node"));
 542         ni->ni_inact = ni->ni_inact_reload;
 543
 544         type = -1;                      /* undefined */
 545
 546         if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
 547                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 548                     ni->ni_macaddr, NULL,
 549                     "too short (1): len %u", m->m_pkthdr.len);
 550                 vap->iv_stats.is_rx_tooshort++;
 551                 goto out;
 552         }
 553         /*
 554          * Bit of a cheat here, we use a pointer for a 3-address
 555          * frame format but don't reference fields past outside
 556          * ieee80211_frame_min w/o first validating the data is
 557          * present.
 558          */
 559         wh = mtod(m, struct ieee80211_frame *);
 560
 561         if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
 562             IEEE80211_FC0_VERSION_0) {
 563                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 564                     ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x",
 565                     wh->i_fc[0], wh->i_fc[1]);
 566                 vap->iv_stats.is_rx_badversion++;
 567                 goto err;
 568         }
 569
 570         dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
 571         type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
 572         subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
 573         if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
 574                 bssid = wh->i_addr2;
 575                 if (!IEEE80211_ADDR_EQ(bssid, ni->ni_bssid)) {
 576                         /* not interested in */
 577                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 578                             bssid, NULL, "%s", "not to bss");
 579                         vap->iv_stats.is_rx_wrongbss++;
 580                         goto out;
 581                 }
 582                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
 583                 ni->ni_noise = nf;
 584                 if (HAS_SEQ(type)) {
 585                         uint8_t tid = ieee80211_gettid(wh);
 586                         if (IEEE80211_QOS_HAS_SEQ(wh) &&
 587                             TID_TO_WME_AC(tid) >= WME_AC_VI)
 588                                 ic->ic_wme.wme_hipri_traffic++;
 589                         rxseq = le16toh(*(uint16_t *)wh->i_seq);
 590                         if ((ni->ni_flags & IEEE80211_NODE_HT) == 0 &&
 591                             (wh->i_fc[1] & IEEE80211_FC1_RETRY) &&
 592                             SEQ_LEQ(rxseq, ni->ni_rxseqs[tid])) {
 593                                 /* duplicate, discard */
 594                                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 595                                     bssid, "duplicate",
 596                                     "seqno <%u,%u> fragno <%u,%u> tid %u",
 597                                     rxseq >> IEEE80211_SEQ_SEQ_SHIFT,
 598                                     ni->ni_rxseqs[tid] >>
 599                                         IEEE80211_SEQ_SEQ_SHIFT,
 600                                     rxseq & IEEE80211_SEQ_FRAG_MASK,
 601                                     ni->ni_rxseqs[tid] &
 602                                         IEEE80211_SEQ_FRAG_MASK,
 603                                     tid);
 604                                 vap->iv_stats.is_rx_dup++;
 605                                 IEEE80211_NODE_STAT(ni, rx_dup);
 606                                 goto out;
 607                         }
 608                         ni->ni_rxseqs[tid] = rxseq;
 609                 }
 610         }
 611
 612         switch (type) {
 613         case IEEE80211_FC0_TYPE_DATA:
 614                 hdrspace = ieee80211_hdrspace(ic, wh);
 615                 if (m->m_len < hdrspace &&
 616                     (m = m_pullup(m, hdrspace)) == NULL) {
 617                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 618                             ni->ni_macaddr, NULL,
 619                             "data too short: expecting %u", hdrspace);
 620                         vap->iv_stats.is_rx_tooshort++;
 621                         goto out;               /* XXX */
 622                 }
 623                 /*
 624                  * Handle A-MPDU re-ordering.  If the frame is to be
 625                  * processed directly then ieee80211_ampdu_reorder
 626                  * will return 0; otherwise it has consumed the mbuf
 627                  * and we should do nothing more with it.
 628                  */
 629                 if ((m->m_flags & M_AMPDU) &&
 630                     (dir == IEEE80211_FC1_DIR_FROMDS ||
 631                      dir == IEEE80211_FC1_DIR_DSTODS) &&
 632                     ieee80211_ampdu_reorder(ni, m) != 0) {
 633                         m = NULL;
 634                         goto out;
 635                 }
 636         resubmit_ampdu:
 637                 if (dir == IEEE80211_FC1_DIR_FROMDS) {
 638                         if ((ifp->if_flags & IFF_SIMPLEX) &&
 639                             isfromds_mcastecho(vap, wh)) {
 640                                 /*
 641                                  * In IEEE802.11 network, multicast
 642                                  * packets sent from "me" are broadcast
 643                                  * from the AP; silently discard for
 644                                  * SIMPLEX interface.
 645                                  */
 646                                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 647                                     wh, "data", "%s", "multicast echo");
 648                                 vap->iv_stats.is_rx_mcastecho++;
 649                                 goto out;
 650                         }
 651                         if ((vap->iv_flags & IEEE80211_F_DWDS) &&
 652                             IEEE80211_IS_MULTICAST(wh->i_addr1)) {
 653                                 /*
 654                                  * DWDS sta's must drop 3-address mcast frames
 655                                  * as they will be sent separately as a 4-addr
 656                                  * frame.  Accepting the 3-addr frame will
 657                                  * confuse the bridge into thinking the sending
 658                                  * sta is located at the end of WDS link.
 659                                  */
 660                                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh,
 661                                     "3-address data", "%s", "DWDS enabled");
 662                                 vap->iv_stats.is_rx_mcastecho++;
 663                                 goto out;
 664                         }
 665                 } else if (dir == IEEE80211_FC1_DIR_DSTODS) {
 666                         if ((vap->iv_flags & IEEE80211_F_DWDS) == 0) {
 667                                 IEEE80211_DISCARD(vap,
 668                                     IEEE80211_MSG_INPUT, wh, "4-address data",
 669                                     "%s", "DWDS not enabled");
 670                                 vap->iv_stats.is_rx_wrongdir++;
 671                                 goto out;
 672                         }
 673                         if ((ifp->if_flags & IFF_SIMPLEX) &&
 674                             isdstods_mcastecho(vap, wh)) {
 675                                 /*
 676                                  * In IEEE802.11 network, multicast
 677                                  * packets sent from "me" are broadcast
 678                                  * from the AP; silently discard for
 679                                  * SIMPLEX interface.
 680                                  */
 681                                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh,
 682                                     "4-address data", "%s", "multicast echo");
 683                                 vap->iv_stats.is_rx_mcastecho++;
 684                                 goto out;
 685                         }
 686                 } else {
 687                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh,
 688                             "data", "incorrect dir 0x%x", dir);
 689                         vap->iv_stats.is_rx_wrongdir++;
 690                         goto out;
 691                 }
 692
 693                 /*
 694                  * Handle privacy requirements.  Note that we
 695                  * must not be preempted from here until after
 696                  * we (potentially) call ieee80211_crypto_demic;
 697                  * otherwise we may violate assumptions in the
 698                  * crypto cipher modules used to do delayed update
 699                  * of replay sequence numbers.
 700                  */
 701                 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
 702                         if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
 703                                 /*
 704                                  * Discard encrypted frames when privacy is off.
 705                                  */
 706                                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 707                                     wh, "WEP", "%s", "PRIVACY off");
 708                                 vap->iv_stats.is_rx_noprivacy++;
 709                                 IEEE80211_NODE_STAT(ni, rx_noprivacy);
 710                                 goto out;
 711                         }
 712                         key = ieee80211_crypto_decap(ni, m, hdrspace);
 713                         if (key == NULL) {
 714                                 /* NB: stats+msgs handled in crypto_decap */
 715                                 IEEE80211_NODE_STAT(ni, rx_wepfail);
 716                                 goto out;
 717                         }
 718                         wh = mtod(m, struct ieee80211_frame *);
 719                         wh->i_fc[1] &= ~IEEE80211_FC1_WEP;
 720                 } else {
 721                         /* XXX M_WEP and IEEE80211_F_PRIVACY */
 722                         key = NULL;
 723                 }
 724
 725                 /*
 726                  * Save QoS bits for use below--before we strip the header.
 727                  */
 728                 if (subtype == IEEE80211_FC0_SUBTYPE_QOS) {
 729                         qos = (dir == IEEE80211_FC1_DIR_DSTODS) ?
 730                             ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] :
 731                             ((struct ieee80211_qosframe *)wh)->i_qos[0];
 732                 } else
 733                         qos = 0;
 734
 735                 /*
 736                  * Next up, any fragmentation.
 737                  */
 738                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
 739                         m = ieee80211_defrag(ni, m, hdrspace);
 740                         if (m == NULL) {
 741                                 /* Fragment dropped or frame not complete yet */
 742                                 goto out;
 743                         }
 744                 }
 745                 wh = NULL;              /* no longer valid, catch any uses */
 746
 747                 /*
 748                  * Next strip any MSDU crypto bits.
 749                  */
 750                 if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) {
 751                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 752                             ni->ni_macaddr, "data", "%s", "demic error");
 753                         vap->iv_stats.is_rx_demicfail++;
 754                         IEEE80211_NODE_STAT(ni, rx_demicfail);
 755                         goto out;
 756                 }
 757
 758                 /* copy to listener after decrypt */
 759                 if (ieee80211_radiotap_active_vap(vap))
 760                         ieee80211_radiotap_rx(vap, m);
 761                 need_tap = 0;
 762
 763                 /*
 764                  * Finally, strip the 802.11 header.
 765                  */
 766                 m = ieee80211_decap(vap, m, hdrspace);
 767                 if (m == NULL) {
 768                         /* XXX mask bit to check for both */
 769                         /* don't count Null data frames as errors */
 770                         if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
 771                             subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
 772                                 goto out;
 773                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 774                             ni->ni_macaddr, "data", "%s", "decap error");
 775                         vap->iv_stats.is_rx_decap++;
 776                         IEEE80211_NODE_STAT(ni, rx_decap);
 777                         goto err;
 778                 }
 779                 eh = mtod(m, struct ether_header *);
 780                 if (!ieee80211_node_is_authorized(ni)) {
 781                         /*
 782                          * Deny any non-PAE frames received prior to
 783                          * authorization.  For open/shared-key
 784                          * authentication the port is mark authorized
 785                          * after authentication completes.  For 802.1x
 786                          * the port is not marked authorized by the
 787                          * authenticator until the handshake has completed.
 788                          */
 789                         if (eh->ether_type != htons(ETHERTYPE_PAE)) {
 790                                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 791                                     eh->ether_shost, "data",
 792                                     "unauthorized port: ether type 0x%x len %u",
 793                                     eh->ether_type, m->m_pkthdr.len);
 794                                 vap->iv_stats.is_rx_unauth++;
 795                                 IEEE80211_NODE_STAT(ni, rx_unauth);
 796                                 goto err;
 797                         }
 798                 } else {
 799                         /*
 800                          * When denying unencrypted frames, discard
 801                          * any non-PAE frames received without encryption.
 802                          */
 803                         if ((vap->iv_flags & IEEE80211_F_DROPUNENC) &&
 804                             (key == NULL && (m->m_flags & M_WEP) == 0) &&
 805                             eh->ether_type != htons(ETHERTYPE_PAE)) {
 806                                 /*
 807                                  * Drop unencrypted frames.
 808                                  */
 809                                 vap->iv_stats.is_rx_unencrypted++;
 810                                 IEEE80211_NODE_STAT(ni, rx_unencrypted);
 811                                 goto out;
 812                         }
 813                 }
 814                 /* XXX require HT? */
 815                 if (qos & IEEE80211_QOS_AMSDU) {
 816                         m = ieee80211_decap_amsdu(ni, m);
 817                         if (m == NULL)
 818                                 return IEEE80211_FC0_TYPE_DATA;
 819                 } else {
 820 #ifdef IEEE80211_SUPPORT_SUPERG
 821                         m = ieee80211_decap_fastframe(vap, ni, m);
 822                         if (m == NULL)
 823                                 return IEEE80211_FC0_TYPE_DATA;
 824 #endif
 825                 }
 826                 ieee80211_deliver_data(vap, ni, m);
 827                 return IEEE80211_FC0_TYPE_DATA;
 828
 829         case IEEE80211_FC0_TYPE_MGT:
 830                 vap->iv_stats.is_rx_mgmt++;
 831                 IEEE80211_NODE_STAT(ni, rx_mgmt);
 832                 if (dir != IEEE80211_FC1_DIR_NODS) {
 833                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 834                             wh, "data", "incorrect dir 0x%x", dir);
 835                         vap->iv_stats.is_rx_wrongdir++;
 836                         goto err;
 837                 }
 838                 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
 839                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 840                             ni->ni_macaddr, "mgt", "too short: len %u",
 841                             m->m_pkthdr.len);
 842                         vap->iv_stats.is_rx_tooshort++;
 843                         goto out;
 844                 }
 845 #ifdef IEEE80211_DEBUG
 846                 if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) ||
 847                     ieee80211_msg_dumppkts(vap)) {
 848                         if_printf(ifp, "received %s from %6D rssi %d\n",
 849                             ieee80211_mgt_subtype_name[subtype >>
 850                                 IEEE80211_FC0_SUBTYPE_SHIFT],
 851                             wh->i_addr2, ":", rssi);
 852                 }
 853 #endif
 854                 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
 855                         if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) {
 856                                 /*
 857                                  * Only shared key auth frames with a challenge
 858                                  * should be encrypted, discard all others.
 859                                  */
 860                                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 861                                     wh, ieee80211_mgt_subtype_name[subtype >>
 862                                         IEEE80211_FC0_SUBTYPE_SHIFT],
 863                                     "%s", "WEP set but not permitted");
 864                                 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
 865                                 goto out;
 866                         }
 867                         if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
 868                                 /*
 869                                  * Discard encrypted frames when privacy is off.
 870                                  */
 871                                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 872                                     wh, "mgt", "%s", "WEP set but PRIVACY off");
 873                                 vap->iv_stats.is_rx_noprivacy++;
 874                                 goto out;
 875                         }
 876                         hdrspace = ieee80211_hdrspace(ic, wh);
 877                         key = ieee80211_crypto_decap(ni, m, hdrspace);
 878                         if (key == NULL) {
 879                                 /* NB: stats+msgs handled in crypto_decap */
 880                                 goto out;
 881                         }
 882                         wh = mtod(m, struct ieee80211_frame *);
 883                         wh->i_fc[1] &= ~IEEE80211_FC1_WEP;
 884                 }
 885                 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf);
 886                 goto out;
 887
 888         case IEEE80211_FC0_TYPE_CTL:
 889                 vap->iv_stats.is_rx_ctl++;
 890                 IEEE80211_NODE_STAT(ni, rx_ctrl);
 891                 vap->iv_recv_ctl(ni, m, subtype);
 892                 goto out;
 893
 894         default:
 895                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
 896                     wh, NULL, "bad frame type 0x%x", type);
 897                 /* should not come here */
 898                 break;
 899         }
 900 err:
 901         ifp->if_ierrors++;
 902 out:
 903         if (m != NULL) {
 904                 if (need_tap && ieee80211_radiotap_active_vap(vap))
 905                         ieee80211_radiotap_rx(vap, m);
 906                 m_freem(m);
 907         }
 908         return type;
 909 #undef SEQ_LEQ
 910 }
 911
 912 static void
 913 sta_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh,
 914     int rssi, int nf, uint16_t seq, uint16_t status)
 915 {
 916         struct ieee80211vap *vap = ni->ni_vap;
 917
 918         if (ni->ni_authmode == IEEE80211_AUTH_SHARED) {
 919                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
 920                     ni->ni_macaddr, "open auth",
 921                     "bad sta auth mode %u", ni->ni_authmode);
 922                 vap->iv_stats.is_rx_bad_auth++; /* XXX */
 923                 return;
 924         }
 925         if (vap->iv_state != IEEE80211_S_AUTH ||
 926             seq != IEEE80211_AUTH_OPEN_RESPONSE) {
 927                 vap->iv_stats.is_rx_bad_auth++;
 928                 return;
 929         }
 930         if (status != 0) {
 931                 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH,
 932                     ni, "open auth failed (reason %d)", status);
 933                 vap->iv_stats.is_rx_auth_fail++;
 934                 vap->iv_stats.is_rx_authfail_code = status;
 935                 ieee80211_new_state(vap, IEEE80211_S_SCAN,
 936                     IEEE80211_SCAN_FAIL_STATUS);
 937         } else
 938                 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0);
 939 }
 940
 941 static void
 942 sta_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh,
 943     uint8_t *frm, uint8_t *efrm, int rssi, int nf,
 944     uint16_t seq, uint16_t status)
 945 {
 946         struct ieee80211vap *vap = ni->ni_vap;
 947         uint8_t *challenge;
 948         int estatus;
 949
 950         /*
 951          * NB: this can happen as we allow pre-shared key
 952          * authentication to be enabled w/o wep being turned
 953          * on so that configuration of these can be done
 954          * in any order.  It may be better to enforce the
 955          * ordering in which case this check would just be
 956          * for sanity/consistency.
 957          */
 958         if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
 959                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
 960                     ni->ni_macaddr, "shared key auth",
 961                     "%s", " PRIVACY is disabled");
 962                 estatus = IEEE80211_STATUS_ALG;
 963                 goto bad;
 964         }
 965         /*
 966          * Pre-shared key authentication is evil; accept
 967          * it only if explicitly configured (it is supported
 968          * mainly for compatibility with clients like OS X).
 969          */
 970         if (ni->ni_authmode != IEEE80211_AUTH_AUTO &&
 971             ni->ni_authmode != IEEE80211_AUTH_SHARED) {
 972                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
 973                     ni->ni_macaddr, "shared key auth",
 974                     "bad sta auth mode %u", ni->ni_authmode);
 975                 vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */
 976                 estatus = IEEE80211_STATUS_ALG;
 977                 goto bad;
 978         }
 979
 980         challenge = NULL;
 981         if (frm + 1 < efrm) {
 982                 if ((frm[1] + 2) > (efrm - frm)) {
 983                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
 984                             ni->ni_macaddr, "shared key auth",
 985                             "ie %d/%d too long",
 986                             frm[0], (frm[1] + 2) - (efrm - frm));
 987                         vap->iv_stats.is_rx_bad_auth++;
 988                         estatus = IEEE80211_STATUS_CHALLENGE;
 989                         goto bad;
 990                 }
 991                 if (*frm == IEEE80211_ELEMID_CHALLENGE)
 992                         challenge = frm;
 993                 frm += frm[1] + 2;
 994         }
 995         switch (seq) {
 996         case IEEE80211_AUTH_SHARED_CHALLENGE:
 997         case IEEE80211_AUTH_SHARED_RESPONSE:
 998                 if (challenge == NULL) {
 999                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1000                             ni->ni_macaddr, "shared key auth",
1001                             "%s", "no challenge");
1002                         vap->iv_stats.is_rx_bad_auth++;
1003                         estatus = IEEE80211_STATUS_CHALLENGE;
1004                         goto bad;
1005                 }
1006                 if (challenge[1] != IEEE80211_CHALLENGE_LEN) {
1007                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1008                             ni->ni_macaddr, "shared key auth",
1009                             "bad challenge len %d", challenge[1]);
1010                         vap->iv_stats.is_rx_bad_auth++;
1011                         estatus = IEEE80211_STATUS_CHALLENGE;
1012                         goto bad;
1013                 }
1014         default:
1015                 break;
1016         }
1017         if (vap->iv_state != IEEE80211_S_AUTH)
1018                 return;
1019         switch (seq) {
1020         case IEEE80211_AUTH_SHARED_PASS:
1021                 if (ni->ni_challenge != NULL) {
1022                         kfree(ni->ni_challenge, M_80211_NODE);
1023                         ni->ni_challenge = NULL;
1024                 }
1025                 if (status != 0) {
1026                         IEEE80211_NOTE_FRAME(vap,
1027                             IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, wh,
1028                             "shared key auth failed (reason %d)", status);
1029                         vap->iv_stats.is_rx_auth_fail++;
1030                         vap->iv_stats.is_rx_authfail_code = status;
1031                         return;
1032                 }
1033                 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0);
1034                 break;
1035         case IEEE80211_AUTH_SHARED_CHALLENGE:
1036                 if (!ieee80211_alloc_challenge(ni))
1037                         return;
1038                 /* XXX could optimize by passing recvd challenge */
1039                 memcpy(ni->ni_challenge, &challenge[2], challenge[1]);
1040                 IEEE80211_SEND_MGMT(ni,
1041                         IEEE80211_FC0_SUBTYPE_AUTH, seq + 1);
1042                 break;
1043         default:
1044                 IEEE80211_DISCARD(vap, IEEE80211_MSG_AUTH,
1045                     wh, "shared key auth", "bad seq %d", seq);
1046                 vap->iv_stats.is_rx_bad_auth++;
1047                 return;
1048         }
1049         return;
1050 bad:
1051         /*
1052          * Kick the state machine.  This short-circuits
1053          * using the mgt frame timeout to trigger the
1054          * state transition.
1055          */
1056         if (vap->iv_state == IEEE80211_S_AUTH)
1057                 ieee80211_new_state(vap, IEEE80211_S_SCAN,
1058                     IEEE80211_SCAN_FAIL_STATUS);
1059 }
1060
1061 static int
1062 ieee80211_parse_wmeparams(struct ieee80211vap *vap, uint8_t *frm,
1063         const struct ieee80211_frame *wh)
1064 {
1065 #define MS(_v, _f)      (((_v) & _f) >> _f##_S)
1066         struct ieee80211_wme_state *wme = &vap->iv_ic->ic_wme;
1067         u_int len = frm[1], qosinfo;
1068         int i;
1069
1070         if (len < sizeof(struct ieee80211_wme_param)-2) {
1071                 IEEE80211_DISCARD_IE(vap,
1072                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WME,
1073                     wh, "WME", "too short, len %u", len);
1074                 return -1;
1075         }
1076         qosinfo = frm[__offsetof(struct ieee80211_wme_param, param_qosInfo)];
1077         qosinfo &= WME_QOSINFO_COUNT;
1078         /* XXX do proper check for wraparound */
1079         if (qosinfo == wme->wme_wmeChanParams.cap_info)
1080                 return 0;
1081         frm += __offsetof(struct ieee80211_wme_param, params_acParams);
1082         for (i = 0; i < WME_NUM_AC; i++) {
1083                 struct wmeParams *wmep =
1084                         &wme->wme_wmeChanParams.cap_wmeParams[i];
1085                 /* NB: ACI not used */
1086                 wmep->wmep_acm = MS(frm[0], WME_PARAM_ACM);
1087                 wmep->wmep_aifsn = MS(frm[0], WME_PARAM_AIFSN);
1088                 wmep->wmep_logcwmin = MS(frm[1], WME_PARAM_LOGCWMIN);
1089                 wmep->wmep_logcwmax = MS(frm[1], WME_PARAM_LOGCWMAX);
1090                 wmep->wmep_txopLimit = LE_READ_2(frm+2);
1091                 frm += 4;
1092         }
1093         wme->wme_wmeChanParams.cap_info = qosinfo;
1094         return 1;
1095 #undef MS
1096 }
1097
1098 /*
1099  * Process 11h Channel Switch Announcement (CSA) ie.  If this
1100  * is the first CSA then initiate the switch.  Otherwise we
1101  * track state and trigger completion and/or cancel of the switch.
1102  * XXX should be public for IBSS use
1103  */
1104 static void
1105 ieee80211_parse_csaparams(struct ieee80211vap *vap, uint8_t *frm,
1106         const struct ieee80211_frame *wh)
1107 {
1108         struct ieee80211com *ic = vap->iv_ic;
1109         const struct ieee80211_csa_ie *csa =
1110             (const struct ieee80211_csa_ie *) frm;
1111
1112         KASSERT(vap->iv_state >= IEEE80211_S_RUN,
1113             ("state %s", ieee80211_state_name[vap->iv_state]));
1114
1115         if (csa->csa_mode > 1) {
1116                 IEEE80211_DISCARD_IE(vap,
1117                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH,
1118                     wh, "CSA", "invalid mode %u", csa->csa_mode);
1119                 return;
1120         }
1121         IEEE80211_LOCK(ic);
1122         if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) {
1123                 /*
1124                  * Convert the channel number to a channel reference.  We
1125                  * try first to preserve turbo attribute of the current
1126                  * channel then fallback.  Note this will not work if the
1127                  * CSA specifies a channel that requires a band switch (e.g.
1128                  * 11a => 11g).  This is intentional as 11h is defined only
1129                  * for 5GHz/11a and because the switch does not involve a
1130                  * reassociation, protocol state (capabilities, negotated
1131                  * rates, etc) may/will be wrong.
1132                  */
1133                 struct ieee80211_channel *c =
1134                     ieee80211_find_channel_byieee(ic, csa->csa_newchan,
1135                         (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALLTURBO));
1136                 if (c == NULL) {
1137                         c = ieee80211_find_channel_byieee(ic,
1138                             csa->csa_newchan,
1139                             (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALL));
1140                         if (c == NULL) {
1141                                 IEEE80211_DISCARD_IE(vap,
1142                                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH,
1143                                     wh, "CSA", "invalid channel %u",
1144                                     csa->csa_newchan);
1145                                 goto done;
1146                         }
1147                 }
1148 #if IEEE80211_CSA_COUNT_MIN > 0
1149                 if (csa->csa_count < IEEE80211_CSA_COUNT_MIN) {
1150                         /*
1151                          * Require at least IEEE80211_CSA_COUNT_MIN count to
1152                          * reduce the risk of being redirected by a fabricated
1153                          * CSA.  If a valid CSA is dropped we'll still get a
1154                          * beacon miss when the AP leaves the channel so we'll
1155                          * eventually follow to the new channel.
1156                          *
1157                          * NOTE: this violates the 11h spec that states that
1158                          * count may be any value and if 0 then a switch
1159                          * should happen asap.
1160                          */
1161                         IEEE80211_DISCARD_IE(vap,
1162                             IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH,
1163                             wh, "CSA", "count %u too small, must be >= %u",
1164                             csa->csa_count, IEEE80211_CSA_COUNT_MIN);
1165                         goto done;
1166                 }
1167 #endif
1168                 ieee80211_csa_startswitch(ic, c, csa->csa_mode, csa->csa_count);
1169         } else {
1170                 /*
1171                  * Validate this ie against the initial CSA.  We require
1172                  * mode and channel not change and the count must be
1173                  * monotonically decreasing.  This may be pointless and
1174                  * canceling the switch as a result may be too paranoid but
1175                  * in the worst case if we drop out of CSA because of this
1176                  * and the AP does move then we'll just end up taking a
1177                  * beacon miss and scan to find the AP.
1178                  *
1179                  * XXX may want <= on count as we also process ProbeResp
1180                  * frames and those may come in w/ the same count as the
1181                  * previous beacon; but doing so leaves us open to a stuck
1182                  * count until we add a dead-man timer
1183                  */
1184                 if (!(csa->csa_count < ic->ic_csa_count &&
1185                       csa->csa_mode == ic->ic_csa_mode &&
1186                       csa->csa_newchan == ieee80211_chan2ieee(ic, ic->ic_csa_newchan))) {
1187                         IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_DOTH, wh,
1188                             "CSA ie mismatch, initial ie <%d,%d,%d>, "
1189                             "this ie <%d,%d,%d>", ic->ic_csa_mode,
1190                             ic->ic_csa_newchan, ic->ic_csa_count,
1191                             csa->csa_mode, csa->csa_newchan, csa->csa_count);
1192                         ieee80211_csa_cancelswitch(ic);
1193                 } else {
1194                         if (csa->csa_count <= 1)
1195                                 ieee80211_csa_completeswitch(ic);
1196                         else
1197                                 ic->ic_csa_count = csa->csa_count;
1198                 }
1199         }
1200 done:
1201         IEEE80211_UNLOCK(ic);
1202 }
1203
1204 /*
1205  * Return non-zero if a background scan may be continued:
1206  * o bg scan is active
1207  * o no channel switch is pending
1208  * o there has not been any traffic recently
1209  *
1210  * Note we do not check if there is an administrative enable;
1211  * this is only done to start the scan.  We assume that any
1212  * change in state will be accompanied by a request to cancel
1213  * active scans which will otherwise cause this test to fail.
1214  */
1215 static __inline int
1216 contbgscan(struct ieee80211vap *vap)
1217 {
1218         struct ieee80211com *ic = vap->iv_ic;
1219
1220         return ((ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN) &&
1221             (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 &&
1222             vap->iv_state == IEEE80211_S_RUN &&         /* XXX? */
1223             time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle));
1224 }
1225
1226 /*
1227  * Return non-zero if a backgrond scan may be started:
1228  * o bg scanning is administratively enabled
1229  * o no channel switch is pending
1230  * o we are not boosted on a dynamic turbo channel
1231  * o there has not been a scan recently
1232  * o there has not been any traffic recently
1233  */
1234 static __inline int
1235 startbgscan(struct ieee80211vap *vap)
1236 {
1237         struct ieee80211com *ic = vap->iv_ic;
1238
1239         return ((vap->iv_flags & IEEE80211_F_BGSCAN) &&
1240             (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 &&
1241 #ifdef IEEE80211_SUPPORT_SUPERG
1242             !IEEE80211_IS_CHAN_DTURBO(ic->ic_curchan) &&
1243 #endif
1244             time_after(ticks, ic->ic_lastscan + vap->iv_bgscanintvl) &&
1245             time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle));
1246 }
1247
1248 static void
1249 sta_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0,
1250         int subtype, int rssi, int nf)
1251 {
1252 #define ISPROBE(_st)    ((_st) == IEEE80211_FC0_SUBTYPE_PROBE_RESP)
1253 #define ISREASSOC(_st)  ((_st) == IEEE80211_FC0_SUBTYPE_REASSOC_RESP)
1254         struct ieee80211vap *vap = ni->ni_vap;
1255         struct ieee80211com *ic = ni->ni_ic;
1256         struct ieee80211_frame *wh;
1257         uint8_t *frm, *efrm;
1258         uint8_t *rates, *xrates, *wme, *htcap, *htinfo;
1259         uint8_t rate;
1260
1261         wh = mtod(m0, struct ieee80211_frame *);
1262         frm = (uint8_t *)&wh[1];
1263         efrm = mtod(m0, uint8_t *) + m0->m_len;
1264         switch (subtype) {
1265         case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1266         case IEEE80211_FC0_SUBTYPE_BEACON: {
1267                 struct ieee80211_scanparams scan;
1268                 /*
1269                  * We process beacon/probe response frames:
1270                  *    o when scanning, or
1271                  *    o station mode when associated (to collect state
1272                  *      updates such as 802.11g slot time)
1273                  * Frames otherwise received are discarded.
1274                  */
1275                 if (!((ic->ic_flags & IEEE80211_F_SCAN) || ni->ni_associd)) {
1276                         vap->iv_stats.is_rx_mgtdiscard++;
1277                         return;
1278                 }
1279                 /* XXX probe response in sta mode when !scanning? */
1280                 if (ieee80211_parse_beacon(ni, m0, &scan) != 0)
1281                         return;
1282                 /*
1283                  * Count frame now that we know it's to be processed.
1284                  */
1285                 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1286                         vap->iv_stats.is_rx_beacon++;           /* XXX remove */
1287                         IEEE80211_NODE_STAT(ni, rx_beacons);
1288                 } else
1289                         IEEE80211_NODE_STAT(ni, rx_proberesp);
1290                 /*
1291                  * When operating in station mode, check for state updates.
1292                  * Be careful to ignore beacons received while doing a
1293                  * background scan.  We consider only 11g/WMM stuff right now.
1294                  */
1295                 if (ni->ni_associd != 0 &&
1296                     ((ic->ic_flags & IEEE80211_F_SCAN) == 0 ||
1297                      IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_bssid))) {
1298                         /* record tsf of last beacon */
1299                         memcpy(ni->ni_tstamp.data, scan.tstamp,
1300                                 sizeof(ni->ni_tstamp));
1301                         /* count beacon frame for s/w bmiss handling */
1302                         vap->iv_swbmiss_count++;
1303                         vap->iv_bmiss_count = 0;
1304                         if (ni->ni_erp != scan.erp) {
1305                                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC,
1306                                     wh->i_addr2,
1307                                     "erp change: was 0x%x, now 0x%x",
1308                                     ni->ni_erp, scan.erp);
1309                                 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
1310                                     (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION))
1311                                         ic->ic_flags |= IEEE80211_F_USEPROT;
1312                                 else
1313                                         ic->ic_flags &= ~IEEE80211_F_USEPROT;
1314                                 ni->ni_erp = scan.erp;
1315                                 /* XXX statistic */
1316                                 /* XXX driver notification */
1317                         }
1318                         if ((ni->ni_capinfo ^ scan.capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME) {
1319                                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC,
1320                                     wh->i_addr2,
1321                                     "capabilities change: was 0x%x, now 0x%x",
1322                                     ni->ni_capinfo, scan.capinfo);
1323                                 /*
1324                                  * NB: we assume short preamble doesn't
1325                                  *     change dynamically
1326                                  */
1327                                 ieee80211_set_shortslottime(ic,
1328                                         IEEE80211_IS_CHAN_A(ic->ic_bsschan) ||
1329                                         (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME));
1330                                 ni->ni_capinfo = (ni->ni_capinfo &~ IEEE80211_CAPINFO_SHORT_SLOTTIME)
1331                                                | (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME);
1332                                 /* XXX statistic */
1333                         }
1334                         if (scan.wme != NULL &&
1335                             (ni->ni_flags & IEEE80211_NODE_QOS) &&
1336                             ieee80211_parse_wmeparams(vap, scan.wme, wh) > 0)
1337                                 ieee80211_wme_updateparams(vap);
1338 #ifdef IEEE80211_SUPPORT_SUPERG
1339                         if (scan.ath != NULL)
1340                                 ieee80211_parse_athparams(ni, scan.ath, wh);
1341 #endif
1342                         if (scan.htcap != NULL && scan.htinfo != NULL &&
1343                             (vap->iv_flags_ht & IEEE80211_FHT_HT)) {
1344                                 ieee80211_ht_updateparams(ni,
1345                                     scan.htcap, scan.htinfo);
1346                                 /* XXX state changes? */
1347                         }
1348                         if (scan.tim != NULL) {
1349                                 struct ieee80211_tim_ie *tim =
1350                                     (struct ieee80211_tim_ie *) scan.tim;
1351 #if 0
1352                                 int aid = IEEE80211_AID(ni->ni_associd);
1353                                 int ix = aid / NBBY;
1354                                 int min = tim->tim_bitctl &~ 1;
1355                                 int max = tim->tim_len + min - 4;
1356                                 if ((tim->tim_bitctl&1) ||
1357                                     (min <= ix && ix <= max &&
1358                                      isset(tim->tim_bitmap - min, aid))) {
1359                                         /*
1360                                          * XXX Do not let bg scan kick off
1361                                          * we are expecting data.
1362                                          */
1363                                         ic->ic_lastdata = ticks;
1364                                         ieee80211_sta_pwrsave(vap, 0);
1365                                 }
1366 #endif
1367                                 ni->ni_dtim_count = tim->tim_count;
1368                                 ni->ni_dtim_period = tim->tim_period;
1369                         }
1370                         if (scan.csa != NULL &&
1371                             (vap->iv_flags & IEEE80211_F_DOTH))
1372                                 ieee80211_parse_csaparams(vap, scan.csa, wh);
1373                         else if (ic->ic_flags & IEEE80211_F_CSAPENDING) {
1374                                 /*
1375                                  * No CSA ie or 11h disabled, but a channel
1376                                  * switch is pending; drop out so we aren't
1377                                  * stuck in CSA state.  If the AP really is
1378                                  * moving we'll get a beacon miss and scan.
1379                                  */
1380                                 IEEE80211_LOCK(ic);
1381                                 ieee80211_csa_cancelswitch(ic);
1382                                 IEEE80211_UNLOCK(ic);
1383                         }
1384                         /*
1385                          * If scanning, pass the info to the scan module.
1386                          * Otherwise, check if it's the right time to do
1387                          * a background scan.  Background scanning must
1388                          * be enabled and we must not be operating in the
1389                          * turbo phase of dynamic turbo mode.  Then,
1390                          * it's been a while since the last background
1391                          * scan and if no data frames have come through
1392                          * recently, kick off a scan.  Note that this
1393                          * is the mechanism by which a background scan
1394                          * is started _and_ continued each time we
1395                          * return on-channel to receive a beacon from
1396                          * our ap.
1397                          */
1398                         if (ic->ic_flags & IEEE80211_F_SCAN) {
1399                                 ieee80211_add_scan(vap, &scan, wh,
1400                                         subtype, rssi, nf);
1401                         } else if (contbgscan(vap)) {
1402                                 ieee80211_bg_scan(vap, 0);
1403                         } else if (startbgscan(vap)) {
1404                                 vap->iv_stats.is_scan_bg++;
1405 #if 0
1406                                 /* wakeup if we are sleeing */
1407                                 ieee80211_set_pwrsave(vap, 0);
1408 #endif
1409                                 ieee80211_bg_scan(vap, 0);
1410                         }
1411                         return;
1412                 }
1413                 /*
1414                  * If scanning, just pass information to the scan module.
1415                  */
1416                 if (ic->ic_flags & IEEE80211_F_SCAN) {
1417                         if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
1418                                 /*
1419                                  * Actively scanning a channel marked passive;
1420                                  * send a probe request now that we know there
1421                                  * is 802.11 traffic present.
1422                                  *
1423                                  * XXX check if the beacon we recv'd gives
1424                                  * us what we need and suppress the probe req
1425                                  */
1426                                 ieee80211_probe_curchan(vap, 1);
1427                                 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1428                         }
1429                         ieee80211_add_scan(vap, &scan, wh, subtype, rssi, nf);
1430                         return;
1431                 }
1432                 break;
1433         }
1434
1435         case IEEE80211_FC0_SUBTYPE_AUTH: {
1436                 uint16_t algo, seq, status;
1437                 /*
1438                  * auth frame format
1439                  *      [2] algorithm
1440                  *      [2] sequence
1441                  *      [2] status
1442                  *      [tlv*] challenge
1443                  */
1444                 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return);
1445                 algo   = le16toh(*(uint16_t *)frm);
1446                 seq    = le16toh(*(uint16_t *)(frm + 2));
1447                 status = le16toh(*(uint16_t *)(frm + 4));
1448                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2,
1449                     "recv auth frame with algorithm %d seq %d", algo, seq);
1450
1451                 if (vap->iv_flags & IEEE80211_F_COUNTERM) {
1452                         IEEE80211_DISCARD(vap,
1453                             IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO,
1454                             wh, "auth", "%s", "TKIP countermeasures enabled");
1455                         vap->iv_stats.is_rx_auth_countermeasures++;
1456                         if (vap->iv_opmode == IEEE80211_M_HOSTAP) {
1457                                 ieee80211_send_error(ni, wh->i_addr2,
1458                                         IEEE80211_FC0_SUBTYPE_AUTH,
1459                                         IEEE80211_REASON_MIC_FAILURE);
1460                         }
1461                         return;
1462                 }
1463                 if (algo == IEEE80211_AUTH_ALG_SHARED)
1464                         sta_auth_shared(ni, wh, frm + 6, efrm, rssi, nf,
1465                             seq, status);
1466                 else if (algo == IEEE80211_AUTH_ALG_OPEN)
1467                         sta_auth_open(ni, wh, rssi, nf, seq, status);
1468                 else {
1469                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1470                             wh, "auth", "unsupported alg %d", algo);
1471                         vap->iv_stats.is_rx_auth_unsupported++;
1472                         return;
1473                 }
1474                 break;
1475         }
1476
1477         case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
1478         case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: {
1479                 uint16_t capinfo, associd;
1480                 uint16_t status;
1481
1482                 if (vap->iv_state != IEEE80211_S_ASSOC) {
1483                         vap->iv_stats.is_rx_mgtdiscard++;
1484                         return;
1485                 }
1486
1487                 /*
1488                  * asresp frame format
1489                  *      [2] capability information
1490                  *      [2] status
1491                  *      [2] association ID
1492                  *      [tlv] supported rates
1493                  *      [tlv] extended supported rates
1494                  *      [tlv] WME
1495                  *      [tlv] HT capabilities
1496                  *      [tlv] HT info
1497                  */
1498                 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return);
1499                 ni = vap->iv_bss;
1500                 capinfo = le16toh(*(uint16_t *)frm);
1501                 frm += 2;
1502                 status = le16toh(*(uint16_t *)frm);
1503                 frm += 2;
1504                 if (status != 0) {
1505                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC,
1506                             wh->i_addr2, "%sassoc failed (reason %d)",
1507                             ISREASSOC(subtype) ?  "re" : "", status);
1508                         vap->iv_stats.is_rx_auth_fail++;        /* XXX */
1509                         return;
1510                 }
1511                 associd = le16toh(*(uint16_t *)frm);
1512                 frm += 2;
1513
1514                 rates = xrates = wme = htcap = htinfo = NULL;
1515                 while (efrm - frm > 1) {
1516                         IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1517                         switch (*frm) {
1518                         case IEEE80211_ELEMID_RATES:
1519                                 rates = frm;
1520                                 break;
1521                         case IEEE80211_ELEMID_XRATES:
1522                                 xrates = frm;
1523                                 break;
1524                         case IEEE80211_ELEMID_HTCAP:
1525                                 htcap = frm;
1526                                 break;
1527                         case IEEE80211_ELEMID_HTINFO:
1528                                 htinfo = frm;
1529                                 break;
1530                         case IEEE80211_ELEMID_VENDOR:
1531                                 if (iswmeoui(frm))
1532                                         wme = frm;
1533                                 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) {
1534                                         /*
1535                                          * Accept pre-draft HT ie's if the
1536                                          * standard ones have not been seen.
1537                                          */
1538                                         if (ishtcapoui(frm)) {
1539                                                 if (htcap == NULL)
1540                                                         htcap = frm;
1541                                         } else if (ishtinfooui(frm)) {
1542                                                 if (htinfo == NULL)
1543                                                         htcap = frm;
1544                                         }
1545                                 }
1546                                 /* XXX Atheros OUI support */
1547                                 break;
1548                         }
1549                         frm += frm[1] + 2;
1550                 }
1551
1552                 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
1553                 if (xrates != NULL)
1554                         IEEE80211_VERIFY_ELEMENT(xrates,
1555                                 IEEE80211_RATE_MAXSIZE - rates[1], return);
1556                 rate = ieee80211_setup_rates(ni, rates, xrates,
1557                                 IEEE80211_F_JOIN |
1558                                 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
1559                                 IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
1560                 if (rate & IEEE80211_RATE_BASIC) {
1561                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC,
1562                             wh->i_addr2,
1563                             "%sassoc failed (rate set mismatch)",
1564                             ISREASSOC(subtype) ?  "re" : "");
1565                         vap->iv_stats.is_rx_assoc_norate++;
1566                         ieee80211_new_state(vap, IEEE80211_S_SCAN,
1567                             IEEE80211_SCAN_FAIL_STATUS);
1568                         return;
1569                 }
1570
1571                 ni->ni_capinfo = capinfo;
1572                 ni->ni_associd = associd;
1573                 if (ni->ni_jointime == 0)
1574                         ni->ni_jointime = time_second;
1575                 if (wme != NULL &&
1576                     ieee80211_parse_wmeparams(vap, wme, wh) >= 0) {
1577                         ni->ni_flags |= IEEE80211_NODE_QOS;
1578                         ieee80211_wme_updateparams(vap);
1579                 } else
1580                         ni->ni_flags &= ~IEEE80211_NODE_QOS;
1581                 /*
1582                  * Setup HT state according to the negotiation.
1583                  *
1584                  * NB: shouldn't need to check if HT use is enabled but some
1585                  *     ap's send back HT ie's even when we don't indicate we
1586                  *     are HT capable in our AssocReq.
1587                  */
1588                 if (htcap != NULL && htinfo != NULL &&
1589                     (vap->iv_flags_ht & IEEE80211_FHT_HT)) {
1590                         ieee80211_ht_node_init(ni);
1591                         ieee80211_ht_updateparams(ni, htcap, htinfo);
1592                         ieee80211_setup_htrates(ni, htcap,
1593                              IEEE80211_F_JOIN | IEEE80211_F_DOBRS);
1594                         ieee80211_setup_basic_htrates(ni, htinfo);
1595                         ieee80211_node_setuptxparms(ni);
1596                 } else {
1597 #ifdef IEEE80211_SUPPORT_SUPERG
1598                         if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_ATH))
1599                                 ieee80211_ff_node_init(ni);
1600 #endif
1601                 }
1602                 /*
1603                  * Configure state now that we are associated.
1604                  *
1605                  * XXX may need different/additional driver callbacks?
1606                  */
1607                 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) ||
1608                     (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) {
1609                         ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
1610                         ic->ic_flags &= ~IEEE80211_F_USEBARKER;
1611                 } else {
1612                         ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
1613                         ic->ic_flags |= IEEE80211_F_USEBARKER;
1614                 }
1615                 ieee80211_set_shortslottime(ic,
1616                         IEEE80211_IS_CHAN_A(ic->ic_curchan) ||
1617                         (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME));
1618                 /*
1619                  * Honor ERP protection.
1620                  *
1621                  * NB: ni_erp should zero for non-11g operation.
1622                  */
1623                 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
1624                     (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION))
1625                         ic->ic_flags |= IEEE80211_F_USEPROT;
1626                 else
1627                         ic->ic_flags &= ~IEEE80211_F_USEPROT;
1628                 IEEE80211_NOTE_MAC(vap,
1629                     IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, wh->i_addr2,
1630                     "%sassoc success at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s",
1631                     ISREASSOC(subtype) ? "re" : "",
1632                     IEEE80211_NODE_AID(ni),
1633                     ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long",
1634                     ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long",
1635                     ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "",
1636                     ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "",
1637                     ni->ni_flags & IEEE80211_NODE_HT ?
1638                         (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "",
1639                     ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "",
1640                     ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" :
1641                         ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "",
1642                     ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "",
1643                     IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ?
1644                         ", fast-frames" : "",
1645                     IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ?
1646                         ", turbo" : ""
1647                 );
1648                 ieee80211_new_state(vap, IEEE80211_S_RUN, subtype);
1649                 break;
1650         }
1651
1652         case IEEE80211_FC0_SUBTYPE_DEAUTH: {
1653                 uint16_t reason;
1654
1655                 if (vap->iv_state == IEEE80211_S_SCAN) {
1656                         vap->iv_stats.is_rx_mgtdiscard++;
1657                         return;
1658                 }
1659                 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) {
1660                         /* NB: can happen when in promiscuous mode */
1661                         vap->iv_stats.is_rx_mgtdiscard++;
1662                         break;
1663                 }
1664
1665                 /*
1666                  * deauth frame format
1667                  *      [2] reason
1668                  */
1669                 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return);
1670                 reason = le16toh(*(uint16_t *)frm);
1671
1672                 vap->iv_stats.is_rx_deauth++;
1673                 vap->iv_stats.is_rx_deauth_code = reason;
1674                 IEEE80211_NODE_STAT(ni, rx_deauth);
1675
1676                 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni,
1677                     "recv deauthenticate (reason %d)", reason);
1678                 ieee80211_new_state(vap, IEEE80211_S_AUTH,
1679                     (reason << 8) | IEEE80211_FC0_SUBTYPE_DEAUTH);
1680                 break;
1681         }
1682
1683         case IEEE80211_FC0_SUBTYPE_DISASSOC: {
1684                 uint16_t reason;
1685
1686                 if (vap->iv_state != IEEE80211_S_RUN &&
1687                     vap->iv_state != IEEE80211_S_ASSOC &&
1688                     vap->iv_state != IEEE80211_S_AUTH) {
1689                         vap->iv_stats.is_rx_mgtdiscard++;
1690                         return;
1691                 }
1692                 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) {
1693                         /* NB: can happen when in promiscuous mode */
1694                         vap->iv_stats.is_rx_mgtdiscard++;
1695                         break;
1696                 }
1697
1698                 /*
1699                  * disassoc frame format
1700                  *      [2] reason
1701                  */
1702                 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return);
1703                 reason = le16toh(*(uint16_t *)frm);
1704
1705                 vap->iv_stats.is_rx_disassoc++;
1706                 vap->iv_stats.is_rx_disassoc_code = reason;
1707                 IEEE80211_NODE_STAT(ni, rx_disassoc);
1708
1709                 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
1710                     "recv disassociate (reason %d)", reason);
1711                 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0);
1712                 break;
1713         }
1714
1715         case IEEE80211_FC0_SUBTYPE_ACTION:
1716                 if (vap->iv_state == IEEE80211_S_RUN) {
1717                         if (ieee80211_parse_action(ni, m0) == 0)
1718                                 ic->ic_recv_action(ni, wh, frm, efrm);
1719                 } else
1720                         vap->iv_stats.is_rx_mgtdiscard++;
1721                 break;
1722
1723         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1724         case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
1725         case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
1726                 vap->iv_stats.is_rx_mgtdiscard++;
1727                 return;
1728         default:
1729                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1730                      wh, "mgt", "subtype 0x%x not handled", subtype);
1731                 vap->iv_stats.is_rx_badsubtype++;
1732                 break;
1733         }
1734 #undef ISREASSOC
1735 #undef ISPROBE
1736 }
1737
1738 static void
1739 sta_recv_ctl(struct ieee80211_node *ni, struct mbuf *m0, int subtype)
1740 {
1741 }