sys/net80211/ieee80211_hostap.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
  26 #include <sys/cdefs.h>
  27 #ifdef __FreeBSD__
  28 __FBSDID("$FreeBSD$");
  29 #endif
  30
  31 /*
  32  * IEEE 802.11 HOSTAP mode support.
  33  */
  34 #include "opt_inet.h"
  35 #include "opt_wlan.h"
  36
  37 #include <sys/param.h>
  38 #include <sys/systm.h>
  39 #include <sys/mbuf.h>
  40 #include <sys/malloc.h>
  41 #include <sys/kernel.h>
  42
  43 #include <sys/socket.h>
  44 #include <sys/sockio.h>
  45 #include <sys/endian.h>
  46 #include <sys/errno.h>
  47 #include <sys/proc.h>
  48 #include <sys/sysctl.h>
  49
  50 #include <net/if.h>
  51 #include <net/if_media.h>
  52 #include <net/if_llc.h>
  53 #include <net/ethernet.h>
  54
  55 #include <net/bpf.h>
  56
  57 #include <net80211/ieee80211_var.h>
  58 #include <net80211/ieee80211_hostap.h>
  59 #include <net80211/ieee80211_input.h>
  60 #include <net80211/ieee80211_wds.h>
  61
  62 #define IEEE80211_RATE2MBS(r)   (((r) & IEEE80211_RATE_VAL) / 2)
  63
  64 static  void hostap_vattach(struct ieee80211vap *);
  65 static  int hostap_newstate(struct ieee80211vap *, enum ieee80211_state, int);
  66 static  int hostap_input(struct ieee80211_node *ni, struct mbuf *m,
  67             int rssi, int noise, uint32_t rstamp);
  68 static void hostap_deliver_data(struct ieee80211vap *,
  69             struct ieee80211_node *, struct mbuf *);
  70 static void hostap_recv_mgmt(struct ieee80211_node *, struct mbuf *,
  71             int subtype, int rssi, int noise, uint32_t rstamp);
  72 static void hostap_recv_pspoll(struct ieee80211_node *, struct mbuf *);
  73
  74 void
  75 ieee80211_hostap_attach(struct ieee80211com *ic)
  76 {
  77         ic->ic_vattach[IEEE80211_M_HOSTAP] = hostap_vattach;
  78 }
  79
  80 void
  81 ieee80211_hostap_detach(struct ieee80211com *ic)
  82 {
  83 }
  84
  85 static void
  86 hostap_vdetach(struct ieee80211vap *vap)
  87 {
  88 }
  89
  90 static void
  91 hostap_vattach(struct ieee80211vap *vap)
  92 {
  93         vap->iv_newstate = hostap_newstate;
  94         vap->iv_input = hostap_input;
  95         vap->iv_recv_mgmt = hostap_recv_mgmt;
  96         vap->iv_opdetach = hostap_vdetach;
  97         vap->iv_deliver_data = hostap_deliver_data;
  98 }
  99
 100 static void
 101 sta_disassoc(void *arg, struct ieee80211_node *ni)
 102 {
 103         struct ieee80211vap *vap = arg;
 104
 105         if (ni->ni_vap == vap && ni->ni_associd != 0) {
 106                 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DISASSOC,
 107                         IEEE80211_REASON_ASSOC_LEAVE);
 108                 ieee80211_node_leave(ni);
 109         }
 110 }
 111
 112 /*
 113  * IEEE80211_M_HOSTAP vap state machine handler.
 114  */
 115 static int
 116 hostap_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
 117 {
 118         struct ieee80211com *ic = vap->iv_ic;
 119         enum ieee80211_state ostate;
 120
 121         IEEE80211_LOCK_ASSERT(ic);
 122
 123         ostate = vap->iv_state;
 124         IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
 125             __func__, ieee80211_state_name[ostate],
 126             ieee80211_state_name[nstate], arg);
 127         vap->iv_state = nstate;                 /* state transition */
 128         if (ostate != IEEE80211_S_SCAN)
 129                 ieee80211_cancel_scan(vap);     /* background scan */
 130         switch (nstate) {
 131         case IEEE80211_S_INIT:
 132                 switch (ostate) {
 133                 case IEEE80211_S_SCAN:
 134                         ieee80211_cancel_scan(vap);
 135                         break;
 136                 case IEEE80211_S_CAC:
 137                         ieee80211_dfs_cac_stop(vap);
 138                         break;
 139                 case IEEE80211_S_RUN:
 140                         ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, vap);
 141                         break;
 142                 default:
 143                         break;
 144                 }
 145                 if (ostate != IEEE80211_S_INIT) {
 146                         /* NB: optimize INIT -> INIT case */
 147                         ieee80211_reset_bss(vap);
 148                 }
 149                 if (vap->iv_auth->ia_detach != NULL)
 150                         vap->iv_auth->ia_detach(vap);
 151                 break;
 152         case IEEE80211_S_SCAN:
 153                 switch (ostate) {
 154                 case IEEE80211_S_CSA:
 155                 case IEEE80211_S_RUN:
 156                         ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, vap);
 157                         /*
 158                          * Clear overlapping BSS state; the beacon frame
 159                          * will be reconstructed on transition to the RUN
 160                          * state and the timeout routines check if the flag
 161                          * is set before doing anything so this is sufficient.
 162                          */
 163                         ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR;
 164                         ic->ic_flags_ext &= ~IEEE80211_FEXT_NONHT_PR;
 165                         /* fall thru... */
 166                 case IEEE80211_S_CAC:
 167                         /*
 168                          * NB: We may get here because of a manual channel
 169                          *     change in which case we need to stop CAC
 170                          * XXX no need to stop if ostate RUN but it's ok
 171                          */
 172                         ieee80211_dfs_cac_stop(vap);
 173                         /* fall thru... */
 174                 case IEEE80211_S_INIT:
 175                         if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
 176                             !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan)) {
 177                                 /*
 178                                  * Already have a channel; bypass the
 179                                  * scan and startup immediately.
 180                                  * ieee80211_create_ibss will call back to
 181                                  * move us to RUN state.
 182                                  */
 183                                 ieee80211_create_ibss(vap, vap->iv_des_chan);
 184                                 break;
 185                         }
 186                         /*
 187                          * Initiate a scan.  We can come here as a result
 188                          * of an IEEE80211_IOC_SCAN_REQ too in which case
 189                          * the vap will be marked with IEEE80211_FEXT_SCANREQ
 190                          * and the scan request parameters will be present
 191                          * in iv_scanreq.  Otherwise we do the default.
 192                          */
 193                         if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
 194                                 ieee80211_check_scan(vap,
 195                                     vap->iv_scanreq_flags,
 196                                     vap->iv_scanreq_duration,
 197                                     vap->iv_scanreq_mindwell,
 198                                     vap->iv_scanreq_maxdwell,
 199                                     vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
 200                                 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
 201                         } else
 202                                 ieee80211_check_scan_current(vap);
 203                         break;
 204                 case IEEE80211_S_SCAN:
 205                         /*
 206                          * A state change requires a reset; scan.
 207                          */
 208                         ieee80211_check_scan_current(vap);
 209                         break;
 210                 default:
 211                         break;
 212                 }
 213                 break;
 214         case IEEE80211_S_CAC:
 215                 /*
 216                  * Start CAC on a DFS channel.  We come here when starting
 217                  * a bss on a DFS channel (see ieee80211_create_ibss).
 218                  */
 219                 ieee80211_dfs_cac_start(vap);
 220                 break;
 221         case IEEE80211_S_RUN:
 222                 if (vap->iv_flags & IEEE80211_F_WPA) {
 223                         /* XXX validate prerequisites */
 224                 }
 225                 switch (ostate) {
 226                 case IEEE80211_S_INIT:
 227                         /*
 228                          * Already have a channel; bypass the
 229                          * scan and startup immediately.
 230                          * Note that ieee80211_create_ibss will call
 231                          * back to do a RUN->RUN state change.
 232                          */
 233                         ieee80211_create_ibss(vap,
 234                             ieee80211_ht_adjust_channel(ic,
 235                                 ic->ic_curchan, vap->iv_flags_ext));
 236                         /* NB: iv_bss is changed on return */
 237                         break;
 238                 case IEEE80211_S_CAC:
 239                         /*
 240                          * NB: This is the normal state change when CAC
 241                          * expires and no radar was detected; no need to
 242                          * clear the CAC timer as it's already expired.
 243                          */
 244                         /* fall thru... */
 245                 case IEEE80211_S_CSA:
 246                         /*
 247                          * Update bss node channel to reflect where
 248                          * we landed after CSA.
 249                          */
 250                         ieee80211_node_set_chan(vap->iv_bss,
 251                             ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
 252                                 ieee80211_htchanflags(vap->iv_bss->ni_chan)));
 253                         /* XXX bypass debug msgs */
 254                         break;
 255                 case IEEE80211_S_SCAN:
 256                 case IEEE80211_S_RUN:
 257 #ifdef IEEE80211_DEBUG
 258                         if (ieee80211_msg_debug(vap)) {
 259                                 struct ieee80211_node *ni = vap->iv_bss;
 260                                 ieee80211_note(vap,
 261                                     "synchronized with %s ssid ",
 262                                     ether_sprintf(ni->ni_bssid));
 263                                 ieee80211_print_essid(ni->ni_essid,
 264                                     ni->ni_esslen);
 265                                 /* XXX MCS/HT */
 266                                 printf(" channel %d start %uMb\n",
 267                                     ieee80211_chan2ieee(ic, ic->ic_curchan),
 268                                     IEEE80211_RATE2MBS(ni->ni_txrate));
 269                         }
 270 #endif
 271                         break;
 272                 default:
 273                         break;
 274                 }
 275                 /*
 276                  * Start/stop the authenticator.  We delay until here
 277                  * to allow configuration to happen out of order.
 278                  */
 279                 if (vap->iv_auth->ia_attach != NULL) {
 280                         /* XXX check failure */
 281                         vap->iv_auth->ia_attach(vap);
 282                 } else if (vap->iv_auth->ia_detach != NULL) {
 283                         vap->iv_auth->ia_detach(vap);
 284                 }
 285                 ieee80211_node_authorize(vap->iv_bss);
 286                 break;
 287         default:
 288                 break;
 289         }
 290         return 0;
 291 }
 292
 293 static void
 294 hostap_deliver_data(struct ieee80211vap *vap,
 295         struct ieee80211_node *ni, struct mbuf *m)
 296 {
 297         struct ether_header *eh = mtod(m, struct ether_header *);
 298         struct ifnet *ifp = vap->iv_ifp;
 299
 300         KASSERT(vap->iv_opmode == IEEE80211_M_HOSTAP,
 301             ("gack, opmode %d", vap->iv_opmode));
 302         /*
 303          * Do accounting.
 304          */
 305         ifp->if_ipackets++;
 306         IEEE80211_NODE_STAT(ni, rx_data);
 307         IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len);
 308         if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
 309                 m->m_flags |= M_MCAST;          /* XXX M_BCAST? */
 310                 IEEE80211_NODE_STAT(ni, rx_mcast);
 311         } else
 312                 IEEE80211_NODE_STAT(ni, rx_ucast);
 313
 314         /* clear driver/net80211 flags before passing up */
 315         m->m_flags &= ~M_80211_RX;
 316
 317         /* perform as a bridge within the AP */
 318         if ((vap->iv_flags & IEEE80211_F_NOBRIDGE) == 0) {
 319                 struct mbuf *mcopy = NULL;
 320
 321                 if (m->m_flags & M_MCAST) {
 322                         mcopy = m_copypacket(m, M_DONTWAIT);
 323                         if (mcopy == NULL)
 324                                 ifp->if_oerrors++;
 325                         else
 326                                 mcopy->m_flags |= M_MCAST;
 327                 } else {
 328                         /*
 329                          * Check if the destination is associated with the
 330                          * same vap and authorized to receive traffic.
 331                          * Beware of traffic destined for the vap itself;
 332                          * sending it will not work; just let it be delivered
 333                          * normally.
 334                          */
 335                         struct ieee80211_node *sta = ieee80211_find_vap_node(
 336                              &vap->iv_ic->ic_sta, vap, eh->ether_dhost);
 337                         if (sta != NULL) {
 338                                 if (ieee80211_node_is_authorized(sta)) {
 339                                         /*
 340                                          * Beware of sending to ourself; this
 341                                          * needs to happen via the normal
 342                                          * input path.
 343                                          */
 344                                         if (sta != vap->iv_bss) {
 345                                                 mcopy = m;
 346                                                 m = NULL;
 347                                         }
 348                                 } else {
 349                                         vap->iv_stats.is_rx_unauth++;
 350                                         IEEE80211_NODE_STAT(sta, rx_unauth);
 351                                 }
 352                                 ieee80211_free_node(sta);
 353                         }
 354                 }
 355                 if (mcopy != NULL) {
 356                         int len, err;
 357                         len = mcopy->m_pkthdr.len;
 358                         IFQ_HANDOFF(ifp, mcopy, err);
 359                         if (err) {
 360                                 /* NB: IFQ_HANDOFF reclaims mcopy */
 361                         } else {
 362                                 ifp->if_opackets++;
 363                         }
 364                 }
 365         }
 366         if (m != NULL) {
 367                 /*
 368                  * Mark frame as coming from vap's interface.
 369                  */
 370                 m->m_pkthdr.rcvif = ifp;
 371                 if (m->m_flags & M_MCAST) {
 372                         /*
 373                          * Spam DWDS vap's w/ multicast traffic.
 374                          */
 375                         /* XXX only if dwds in use? */
 376                         ieee80211_dwds_mcast(vap, m);
 377                 }
 378                 if (ni->ni_vlan != 0) {
 379                         /* attach vlan tag */
 380                         m->m_pkthdr.ether_vtag = ni->ni_vlan;
 381                         m->m_flags |= M_VLANTAG;
 382                 }
 383                 ifp->if_input(ifp, m);
 384         }
 385 }
 386
 387 /*
 388  * Decide if a received management frame should be
 389  * printed when debugging is enabled.  This filters some
 390  * of the less interesting frames that come frequently
 391  * (e.g. beacons).
 392  */
 393 static __inline int
 394 doprint(struct ieee80211vap *vap, int subtype)
 395 {
 396         switch (subtype) {
 397         case IEEE80211_FC0_SUBTYPE_BEACON:
 398                 return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN);
 399         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
 400                 return 0;
 401         }
 402         return 1;
 403 }
 404
 405 /*
 406  * Process a received frame.  The node associated with the sender
 407  * should be supplied.  If nothing was found in the node table then
 408  * the caller is assumed to supply a reference to iv_bss instead.
 409  * The RSSI and a timestamp are also supplied.  The RSSI data is used
 410  * during AP scanning to select a AP to associate with; it can have
 411  * any units so long as values have consistent units and higher values
 412  * mean ``better signal''.  The receive timestamp is currently not used
 413  * by the 802.11 layer.
 414  */
 415 static int
 416 hostap_input(struct ieee80211_node *ni, struct mbuf *m,
 417         int rssi, int noise, uint32_t rstamp)
 418 {
 419 #define SEQ_LEQ(a,b)    ((int)((a)-(b)) <= 0)
 420 #define HAS_SEQ(type)   ((type & 0x4) == 0)
 421         struct ieee80211vap *vap = ni->ni_vap;
 422         struct ieee80211com *ic = ni->ni_ic;
 423         struct ifnet *ifp = vap->iv_ifp;
 424         struct ieee80211_frame *wh;
 425         struct ieee80211_key *key;
 426         struct ether_header *eh;
 427         int hdrspace, need_tap;
 428         uint8_t dir, type, subtype, qos;
 429         uint8_t *bssid;
 430         uint16_t rxseq;
 431
 432         if (m->m_flags & M_AMPDU) {
 433                 /*
 434                  * Fastpath for A-MPDU reorder q resubmission.  Frames
 435                  * w/ M_AMPDU marked have already passed through here
 436                  * but were received out of order and been held on the
 437                  * reorder queue.  When resubmitted they are marked
 438                  * with the M_AMPDU flag and we can bypass most of the
 439                  * normal processing.
 440                  */
 441                 wh = mtod(m, struct ieee80211_frame *);
 442                 type = IEEE80211_FC0_TYPE_DATA;
 443                 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
 444                 subtype = IEEE80211_FC0_SUBTYPE_QOS;
 445                 hdrspace = ieee80211_hdrspace(ic, wh);  /* XXX optimize? */
 446                 goto resubmit_ampdu;
 447         }
 448
 449         KASSERT(ni != NULL, ("null node"));
 450         ni->ni_inact = ni->ni_inact_reload;
 451
 452         need_tap = 1;                   /* mbuf need to be tapped. */
 453         type = -1;                      /* undefined */
 454
 455         if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
 456                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 457                     ni->ni_macaddr, NULL,
 458                     "too short (1): len %u", m->m_pkthdr.len);
 459                 vap->iv_stats.is_rx_tooshort++;
 460                 goto out;
 461         }
 462         /*
 463          * Bit of a cheat here, we use a pointer for a 3-address
 464          * frame format but don't reference fields past outside
 465          * ieee80211_frame_min w/o first validating the data is
 466          * present.
 467          */
 468         wh = mtod(m, struct ieee80211_frame *);
 469
 470         if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
 471             IEEE80211_FC0_VERSION_0) {
 472                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 473                     ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]);
 474                 vap->iv_stats.is_rx_badversion++;
 475                 goto err;
 476         }
 477
 478         dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
 479         type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
 480         subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
 481         if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
 482                 if (dir != IEEE80211_FC1_DIR_NODS)
 483                         bssid = wh->i_addr1;
 484                 else if (type == IEEE80211_FC0_TYPE_CTL)
 485                         bssid = wh->i_addr1;
 486                 else {
 487                         if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
 488                                 IEEE80211_DISCARD_MAC(vap,
 489                                     IEEE80211_MSG_ANY, ni->ni_macaddr,
 490                                     NULL, "too short (2): len %u",
 491                                     m->m_pkthdr.len);
 492                                 vap->iv_stats.is_rx_tooshort++;
 493                                 goto out;
 494                         }
 495                         bssid = wh->i_addr3;
 496                 }
 497                 /*
 498                  * Validate the bssid.
 499                  */
 500                 if (!(type == IEEE80211_FC0_TYPE_MGT &&
 501                       subtype == IEEE80211_FC0_SUBTYPE_BEACON) &&
 502                     !IEEE80211_ADDR_EQ(bssid, vap->iv_bss->ni_bssid) &&
 503                     !IEEE80211_ADDR_EQ(bssid, ifp->if_broadcastaddr)) {
 504                         /* not interested in */
 505                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 506                             bssid, NULL, "%s", "not to bss");
 507                         vap->iv_stats.is_rx_wrongbss++;
 508                         goto out;
 509                 }
 510
 511                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
 512                 ni->ni_noise = noise;
 513                 ni->ni_rstamp = rstamp;
 514                 if (HAS_SEQ(type)) {
 515                         uint8_t tid = ieee80211_gettid(wh);
 516                         if (IEEE80211_QOS_HAS_SEQ(wh) &&
 517                             TID_TO_WME_AC(tid) >= WME_AC_VI)
 518                                 ic->ic_wme.wme_hipri_traffic++;
 519                         rxseq = le16toh(*(uint16_t *)wh->i_seq);
 520                         if ((ni->ni_flags & IEEE80211_NODE_HT) == 0 &&
 521                             (wh->i_fc[1] & IEEE80211_FC1_RETRY) &&
 522                             SEQ_LEQ(rxseq, ni->ni_rxseqs[tid])) {
 523                                 /* duplicate, discard */
 524                                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 525                                     bssid, "duplicate",
 526                                     "seqno <%u,%u> fragno <%u,%u> tid %u",
 527                                     rxseq >> IEEE80211_SEQ_SEQ_SHIFT,
 528                                     ni->ni_rxseqs[tid] >>
 529                                         IEEE80211_SEQ_SEQ_SHIFT,
 530                                     rxseq & IEEE80211_SEQ_FRAG_MASK,
 531                                     ni->ni_rxseqs[tid] &
 532                                         IEEE80211_SEQ_FRAG_MASK,
 533                                     tid);
 534                                 vap->iv_stats.is_rx_dup++;
 535                                 IEEE80211_NODE_STAT(ni, rx_dup);
 536                                 goto out;
 537                         }
 538                         ni->ni_rxseqs[tid] = rxseq;
 539                 }
 540         }
 541
 542         switch (type) {
 543         case IEEE80211_FC0_TYPE_DATA:
 544                 hdrspace = ieee80211_hdrspace(ic, wh);
 545                 if (m->m_len < hdrspace &&
 546                     (m = m_pullup(m, hdrspace)) == NULL) {
 547                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 548                             ni->ni_macaddr, NULL,
 549                             "data too short: expecting %u", hdrspace);
 550                         vap->iv_stats.is_rx_tooshort++;
 551                         goto out;               /* XXX */
 552                 }
 553                 if (!(dir == IEEE80211_FC1_DIR_TODS ||
 554                      (dir == IEEE80211_FC1_DIR_DSTODS &&
 555                       (vap->iv_flags & IEEE80211_F_DWDS)))) {
 556                         if (dir != IEEE80211_FC1_DIR_DSTODS) {
 557                                 IEEE80211_DISCARD(vap,
 558                                     IEEE80211_MSG_INPUT, wh, "data",
 559                                     "incorrect dir 0x%x", dir);
 560                         } else {
 561                                 IEEE80211_DISCARD(vap,
 562                                     IEEE80211_MSG_INPUT |
 563                                     IEEE80211_MSG_WDS, wh,
 564                                     "4-address data",
 565                                     "%s", "DWDS not enabled");
 566                         }
 567                         vap->iv_stats.is_rx_wrongdir++;
 568                         goto out;
 569                 }
 570                 /* check if source STA is associated */
 571                 if (ni == vap->iv_bss) {
 572                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 573                             wh, "data", "%s", "unknown src");
 574                         ieee80211_send_error(ni, wh->i_addr2,
 575                             IEEE80211_FC0_SUBTYPE_DEAUTH,
 576                             IEEE80211_REASON_NOT_AUTHED);
 577                         vap->iv_stats.is_rx_notassoc++;
 578                         goto err;
 579                 }
 580                 if (ni->ni_associd == 0) {
 581                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 582                             wh, "data", "%s", "unassoc src");
 583                         IEEE80211_SEND_MGMT(ni,
 584                             IEEE80211_FC0_SUBTYPE_DISASSOC,
 585                             IEEE80211_REASON_NOT_ASSOCED);
 586                         vap->iv_stats.is_rx_notassoc++;
 587                         goto err;
 588                 }
 589
 590                 /*
 591                  * Check for power save state change.
 592                  * XXX out-of-order A-MPDU frames?
 593                  */
 594                 if (((wh->i_fc[1] & IEEE80211_FC1_PWR_MGT) ^
 595                     (ni->ni_flags & IEEE80211_NODE_PWR_MGT)))
 596                         ieee80211_node_pwrsave(ni,
 597                                 wh->i_fc[1] & IEEE80211_FC1_PWR_MGT);
 598                 /*
 599                  * For 4-address packets handle WDS discovery
 600                  * notifications.  Once a WDS link is setup frames
 601                  * are just delivered to the WDS vap (see below).
 602                  */
 603                 if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap == NULL) {
 604                         if (!ieee80211_node_is_authorized(ni)) {
 605                                 IEEE80211_DISCARD(vap,
 606                                     IEEE80211_MSG_INPUT |
 607                                     IEEE80211_MSG_WDS, wh,
 608                                     "4-address data",
 609                                     "%s", "unauthorized port");
 610                                 vap->iv_stats.is_rx_unauth++;
 611                                 IEEE80211_NODE_STAT(ni, rx_unauth);
 612                                 goto err;
 613                         }
 614                         ieee80211_dwds_discover(ni, m);
 615                         return type;
 616                 }
 617
 618                 /*
 619                  * Handle A-MPDU re-ordering.  The station must be
 620                  * associated and negotiated HT.  The frame must be
 621                  * a QoS frame (not QoS null data) and not previously
 622                  * processed for A-MPDU re-ordering.  If the frame is
 623                  * to be processed directly then ieee80211_ampdu_reorder
 624                  * will return 0; otherwise it has consumed the mbuf
 625                  * and we should do nothing more with it.
 626                  */
 627                 if ((ni->ni_flags & IEEE80211_NODE_HT) &&
 628                     subtype == IEEE80211_FC0_SUBTYPE_QOS &&
 629                     ieee80211_ampdu_reorder(ni, m) != 0) {
 630                         m = NULL;
 631                         goto out;
 632                 }
 633         resubmit_ampdu:
 634
 635                 /*
 636                  * Handle privacy requirements.  Note that we
 637                  * must not be preempted from here until after
 638                  * we (potentially) call ieee80211_crypto_demic;
 639                  * otherwise we may violate assumptions in the
 640                  * crypto cipher modules used to do delayed update
 641                  * of replay sequence numbers.
 642                  */
 643                 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
 644                         if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
 645                                 /*
 646                                  * Discard encrypted frames when privacy is off.
 647                                  */
 648                                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 649                                     wh, "WEP", "%s", "PRIVACY off");
 650                                 vap->iv_stats.is_rx_noprivacy++;
 651                                 IEEE80211_NODE_STAT(ni, rx_noprivacy);
 652                                 goto out;
 653                         }
 654                         key = ieee80211_crypto_decap(ni, m, hdrspace);
 655                         if (key == NULL) {
 656                                 /* NB: stats+msgs handled in crypto_decap */
 657                                 IEEE80211_NODE_STAT(ni, rx_wepfail);
 658                                 goto out;
 659                         }
 660                         wh = mtod(m, struct ieee80211_frame *);
 661                         wh->i_fc[1] &= ~IEEE80211_FC1_WEP;
 662                 } else {
 663                         /* XXX M_WEP and IEEE80211_F_PRIVACY */
 664                         key = NULL;
 665                 }
 666
 667                 /*
 668                  * Save QoS bits for use below--before we strip the header.
 669                  */
 670                 if (subtype == IEEE80211_FC0_SUBTYPE_QOS) {
 671                         qos = (dir == IEEE80211_FC1_DIR_DSTODS) ?
 672                             ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] :
 673                             ((struct ieee80211_qosframe *)wh)->i_qos[0];
 674                 } else
 675                         qos = 0;
 676
 677                 /*
 678                  * Next up, any fragmentation.
 679                  */
 680                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
 681                         m = ieee80211_defrag(ni, m, hdrspace);
 682                         if (m == NULL) {
 683                                 /* Fragment dropped or frame not complete yet */
 684                                 goto out;
 685                         }
 686                 }
 687                 wh = NULL;              /* no longer valid, catch any uses */
 688
 689                 /*
 690                  * Next strip any MSDU crypto bits.
 691                  */
 692                 if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) {
 693                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 694                             ni->ni_macaddr, "data", "%s", "demic error");
 695                         vap->iv_stats.is_rx_demicfail++;
 696                         IEEE80211_NODE_STAT(ni, rx_demicfail);
 697                         goto out;
 698                 }
 699                 /* copy to listener after decrypt */
 700                 if (bpf_peers_present(vap->iv_rawbpf))
 701                         bpf_mtap(vap->iv_rawbpf, m);
 702                 need_tap = 0;
 703                 /*
 704                  * Finally, strip the 802.11 header.
 705                  */
 706                 m = ieee80211_decap(vap, m, hdrspace);
 707                 if (m == NULL) {
 708                         /* XXX mask bit to check for both */
 709                         /* don't count Null data frames as errors */
 710                         if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
 711                             subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
 712                                 goto out;
 713                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 714                             ni->ni_macaddr, "data", "%s", "decap error");
 715                         vap->iv_stats.is_rx_decap++;
 716                         IEEE80211_NODE_STAT(ni, rx_decap);
 717                         goto err;
 718                 }
 719                 eh = mtod(m, struct ether_header *);
 720                 if (!ieee80211_node_is_authorized(ni)) {
 721                         /*
 722                          * Deny any non-PAE frames received prior to
 723                          * authorization.  For open/shared-key
 724                          * authentication the port is mark authorized
 725                          * after authentication completes.  For 802.1x
 726                          * the port is not marked authorized by the
 727                          * authenticator until the handshake has completed.
 728                          */
 729                         if (eh->ether_type != htons(ETHERTYPE_PAE)) {
 730                                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 731                                     eh->ether_shost, "data",
 732                                     "unauthorized port: ether type 0x%x len %u",
 733                                     eh->ether_type, m->m_pkthdr.len);
 734                                 vap->iv_stats.is_rx_unauth++;
 735                                 IEEE80211_NODE_STAT(ni, rx_unauth);
 736                                 goto err;
 737                         }
 738                 } else {
 739                         /*
 740                          * When denying unencrypted frames, discard
 741                          * any non-PAE frames received without encryption.
 742                          */
 743                         if ((vap->iv_flags & IEEE80211_F_DROPUNENC) &&
 744                             (key == NULL && (m->m_flags & M_WEP) == 0) &&
 745                             eh->ether_type != htons(ETHERTYPE_PAE)) {
 746                                 /*
 747                                  * Drop unencrypted frames.
 748                                  */
 749                                 vap->iv_stats.is_rx_unencrypted++;
 750                                 IEEE80211_NODE_STAT(ni, rx_unencrypted);
 751                                 goto out;
 752                         }
 753                 }
 754                 /* XXX require HT? */
 755                 if (qos & IEEE80211_QOS_AMSDU) {
 756                         m = ieee80211_decap_amsdu(ni, m);
 757                         if (m == NULL)
 758                                 return IEEE80211_FC0_TYPE_DATA;
 759                 } else if ((ni->ni_ath_flags & IEEE80211_NODE_FF) &&
 760 #define FF_LLC_SIZE     (sizeof(struct ether_header) + sizeof(struct llc))
 761                     m->m_pkthdr.len >= 3*FF_LLC_SIZE) {
 762                         struct llc *llc;
 763
 764                         /*
 765                          * Check for fast-frame tunnel encapsulation.
 766                          */
 767                         if (m->m_len < FF_LLC_SIZE &&
 768                             (m = m_pullup(m, FF_LLC_SIZE)) == NULL) {
 769                                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 770                                     ni->ni_macaddr, "fast-frame",
 771                                     "%s", "m_pullup(llc) failed");
 772                                 vap->iv_stats.is_rx_tooshort++;
 773                                 return IEEE80211_FC0_TYPE_DATA;
 774                         }
 775                         llc = (struct llc *)(mtod(m, uint8_t *) +
 776                                 sizeof(struct ether_header));
 777                         if (llc->llc_snap.ether_type == htons(ATH_FF_ETH_TYPE)) {
 778                                 m_adj(m, FF_LLC_SIZE);
 779                                 m = ieee80211_decap_fastframe(ni, m);
 780                                 if (m == NULL)
 781                                         return IEEE80211_FC0_TYPE_DATA;
 782                         }
 783                 }
 784 #undef FF_LLC_SIZE
 785                 if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap != NULL)
 786                         ieee80211_deliver_data(ni->ni_wdsvap, ni, m);
 787                 else
 788                         hostap_deliver_data(vap, ni, m);
 789                 return IEEE80211_FC0_TYPE_DATA;
 790
 791         case IEEE80211_FC0_TYPE_MGT:
 792                 vap->iv_stats.is_rx_mgmt++;
 793                 IEEE80211_NODE_STAT(ni, rx_mgmt);
 794                 if (dir != IEEE80211_FC1_DIR_NODS) {
 795                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 796                             wh, "mgt", "incorrect dir 0x%x", dir);
 797                         vap->iv_stats.is_rx_wrongdir++;
 798                         goto err;
 799                 }
 800                 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
 801                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 802                             ni->ni_macaddr, "mgt", "too short: len %u",
 803                             m->m_pkthdr.len);
 804                         vap->iv_stats.is_rx_tooshort++;
 805                         goto out;
 806                 }
 807                 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
 808                         /* ensure return frames are unicast */
 809                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
 810                             wh, NULL, "source is multicast: %s",
 811                             ether_sprintf(wh->i_addr2));
 812                         vap->iv_stats.is_rx_mgtdiscard++;       /* XXX stat */
 813                         goto out;
 814                 }
 815 #ifdef IEEE80211_DEBUG
 816                 if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) ||
 817                     ieee80211_msg_dumppkts(vap)) {
 818                         if_printf(ifp, "received %s from %s rssi %d\n",
 819                             ieee80211_mgt_subtype_name[subtype >>
 820                                 IEEE80211_FC0_SUBTYPE_SHIFT],
 821                             ether_sprintf(wh->i_addr2), rssi);
 822                 }
 823 #endif
 824                 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
 825                         if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) {
 826                                 /*
 827                                  * Only shared key auth frames with a challenge
 828                                  * should be encrypted, discard all others.
 829                                  */
 830                                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 831                                     wh, NULL,
 832                                     "%s", "WEP set but not permitted");
 833                                 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
 834                                 goto out;
 835                         }
 836                         if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
 837                                 /*
 838                                  * Discard encrypted frames when privacy is off.
 839                                  */
 840                                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 841                                     wh, NULL, "%s", "WEP set but PRIVACY off");
 842                                 vap->iv_stats.is_rx_noprivacy++;
 843                                 goto out;
 844                         }
 845                         hdrspace = ieee80211_hdrspace(ic, wh);
 846                         key = ieee80211_crypto_decap(ni, m, hdrspace);
 847                         if (key == NULL) {
 848                                 /* NB: stats+msgs handled in crypto_decap */
 849                                 goto out;
 850                         }
 851                         wh = mtod(m, struct ieee80211_frame *);
 852                         wh->i_fc[1] &= ~IEEE80211_FC1_WEP;
 853                 }
 854                 if (bpf_peers_present(vap->iv_rawbpf))
 855                         bpf_mtap(vap->iv_rawbpf, m);
 856                 vap->iv_recv_mgmt(ni, m, subtype, rssi, noise, rstamp);
 857                 m_freem(m);
 858                 return IEEE80211_FC0_TYPE_MGT;
 859
 860         case IEEE80211_FC0_TYPE_CTL:
 861                 vap->iv_stats.is_rx_ctl++;
 862                 IEEE80211_NODE_STAT(ni, rx_ctrl);
 863                 switch (subtype) {
 864                 case IEEE80211_FC0_SUBTYPE_PS_POLL:
 865                         hostap_recv_pspoll(ni, m);
 866                         break;
 867                 case IEEE80211_FC0_SUBTYPE_BAR:
 868                         ieee80211_recv_bar(ni, m);
 869                         break;
 870                 }
 871                 goto out;
 872         default:
 873                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
 874                     wh, "bad", "frame type 0x%x", type);
 875                 /* should not come here */
 876                 break;
 877         }
 878 err:
 879         ifp->if_ierrors++;
 880 out:
 881         if (m != NULL) {
 882                 if (bpf_peers_present(vap->iv_rawbpf) && need_tap)
 883                         bpf_mtap(vap->iv_rawbpf, m);
 884                 m_freem(m);
 885         }
 886         return type;
 887 #undef SEQ_LEQ
 888 }
 889
 890 static void
 891 hostap_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh,
 892     int rssi, int noise, uint32_t rstamp, uint16_t seq, uint16_t status)
 893 {
 894         struct ieee80211vap *vap = ni->ni_vap;
 895
 896         KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state));
 897
 898         if (ni->ni_authmode == IEEE80211_AUTH_SHARED) {
 899                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
 900                     ni->ni_macaddr, "open auth",
 901                     "bad sta auth mode %u", ni->ni_authmode);
 902                 vap->iv_stats.is_rx_bad_auth++; /* XXX */
 903                 /*
 904                  * Clear any challenge text that may be there if
 905                  * a previous shared key auth failed and then an
 906                  * open auth is attempted.
 907                  */
 908                 if (ni->ni_challenge != NULL) {
 909                         FREE(ni->ni_challenge, M_80211_NODE);
 910                         ni->ni_challenge = NULL;
 911                 }
 912                 /* XXX hack to workaround calling convention */
 913                 ieee80211_send_error(ni, wh->i_addr2,
 914                     IEEE80211_FC0_SUBTYPE_AUTH,
 915                     (seq + 1) | (IEEE80211_STATUS_ALG<<16));
 916                 return;
 917         }
 918         if (seq != IEEE80211_AUTH_OPEN_REQUEST) {
 919                 vap->iv_stats.is_rx_bad_auth++;
 920                 return;
 921         }
 922         /* always accept open authentication requests */
 923         if (ni == vap->iv_bss) {
 924                 ni = ieee80211_dup_bss(vap, wh->i_addr2);
 925                 if (ni == NULL)
 926                         return;
 927         } else if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0)
 928                 (void) ieee80211_ref_node(ni);
 929         /*
 930          * Mark the node as referenced to reflect that it's
 931          * reference count has been bumped to insure it remains
 932          * after the transaction completes.
 933          */
 934         ni->ni_flags |= IEEE80211_NODE_AREF;
 935
 936         if (vap->iv_acl != NULL &&
 937             vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) {
 938                 /*
 939                  * When the ACL policy is set to RADIUS we defer the
 940                  * authorization to a user agent.  Dispatch an event,
 941                  * a subsequent MLME call will decide the fate of the
 942                  * station.  If the user agent is not present then the
 943                  * node will be reclaimed due to inactivity.
 944                  */
 945                 IEEE80211_NOTE_MAC(vap,
 946                     IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, ni->ni_macaddr,
 947                     "%s", "station authentication defered (radius acl)");
 948                 ieee80211_notify_node_auth(ni);
 949         } else {
 950                 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1);
 951                 IEEE80211_NOTE_MAC(vap,
 952                     IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni->ni_macaddr,
 953                     "%s", "station authenticated (open)");
 954                 /*
 955                  * When 802.1x is not in use mark the port
 956                  * authorized at this point so traffic can flow.
 957                  */
 958                 if (ni->ni_authmode != IEEE80211_AUTH_8021X)
 959                         ieee80211_node_authorize(ni);
 960         }
 961 }
 962
 963 static void
 964 hostap_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh,
 965     uint8_t *frm, uint8_t *efrm, int rssi, int noise, uint32_t rstamp,
 966     uint16_t seq, uint16_t status)
 967 {
 968         struct ieee80211vap *vap = ni->ni_vap;
 969         uint8_t *challenge;
 970         int allocbs, estatus;
 971
 972         KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state));
 973
 974         /*
 975          * NB: this can happen as we allow pre-shared key
 976          * authentication to be enabled w/o wep being turned
 977          * on so that configuration of these can be done
 978          * in any order.  It may be better to enforce the
 979          * ordering in which case this check would just be
 980          * for sanity/consistency.
 981          */
 982         if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
 983                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
 984                     ni->ni_macaddr, "shared key auth",
 985                     "%s", " PRIVACY is disabled");
 986                 estatus = IEEE80211_STATUS_ALG;
 987                 goto bad;
 988         }
 989         /*
 990          * Pre-shared key authentication is evil; accept
 991          * it only if explicitly configured (it is supported
 992          * mainly for compatibility with clients like Mac OS X).
 993          */
 994         if (ni->ni_authmode != IEEE80211_AUTH_AUTO &&
 995             ni->ni_authmode != IEEE80211_AUTH_SHARED) {
 996                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
 997                     ni->ni_macaddr, "shared key auth",
 998                     "bad sta auth mode %u", ni->ni_authmode);
 999                 vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */
1000                 estatus = IEEE80211_STATUS_ALG;
1001                 goto bad;
1002         }
1003
1004         challenge = NULL;
1005         if (frm + 1 < efrm) {
1006                 if ((frm[1] + 2) > (efrm - frm)) {
1007                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1008                             ni->ni_macaddr, "shared key auth",
1009                             "ie %d/%d too long",
1010                             frm[0], (frm[1] + 2) - (efrm - frm));
1011                         vap->iv_stats.is_rx_bad_auth++;
1012                         estatus = IEEE80211_STATUS_CHALLENGE;
1013                         goto bad;
1014                 }
1015                 if (*frm == IEEE80211_ELEMID_CHALLENGE)
1016                         challenge = frm;
1017                 frm += frm[1] + 2;
1018         }
1019         switch (seq) {
1020         case IEEE80211_AUTH_SHARED_CHALLENGE:
1021         case IEEE80211_AUTH_SHARED_RESPONSE:
1022                 if (challenge == NULL) {
1023                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1024                             ni->ni_macaddr, "shared key auth",
1025                             "%s", "no challenge");
1026                         vap->iv_stats.is_rx_bad_auth++;
1027                         estatus = IEEE80211_STATUS_CHALLENGE;
1028                         goto bad;
1029                 }
1030                 if (challenge[1] != IEEE80211_CHALLENGE_LEN) {
1031                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1032                             ni->ni_macaddr, "shared key auth",
1033                             "bad challenge len %d", challenge[1]);
1034                         vap->iv_stats.is_rx_bad_auth++;
1035                         estatus = IEEE80211_STATUS_CHALLENGE;
1036                         goto bad;
1037                 }
1038         default:
1039                 break;
1040         }
1041         switch (seq) {
1042         case IEEE80211_AUTH_SHARED_REQUEST:
1043                 if (ni == vap->iv_bss) {
1044                         ni = ieee80211_dup_bss(vap, wh->i_addr2);
1045                         if (ni == NULL) {
1046                                 /* NB: no way to return an error */
1047                                 return;
1048                         }
1049                         allocbs = 1;
1050                 } else {
1051                         if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0)
1052                                 (void) ieee80211_ref_node(ni);
1053                         allocbs = 0;
1054                 }
1055                 /*
1056                  * Mark the node as referenced to reflect that it's
1057                  * reference count has been bumped to insure it remains
1058                  * after the transaction completes.
1059                  */
1060                 ni->ni_flags |= IEEE80211_NODE_AREF;
1061                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1062                 ni->ni_noise = noise;
1063                 ni->ni_rstamp = rstamp;
1064                 if (!ieee80211_alloc_challenge(ni)) {
1065                         /* NB: don't return error so they rexmit */
1066                         return;
1067                 }
1068                 get_random_bytes(ni->ni_challenge,
1069                         IEEE80211_CHALLENGE_LEN);
1070                 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH,
1071                     ni, "shared key %sauth request", allocbs ? "" : "re");
1072                 /*
1073                  * When the ACL policy is set to RADIUS we defer the
1074                  * authorization to a user agent.  Dispatch an event,
1075                  * a subsequent MLME call will decide the fate of the
1076                  * station.  If the user agent is not present then the
1077                  * node will be reclaimed due to inactivity.
1078                  */
1079                 if (vap->iv_acl != NULL &&
1080                     vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) {
1081                         IEEE80211_NOTE_MAC(vap,
1082                             IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL,
1083                             ni->ni_macaddr,
1084                             "%s", "station authentication defered (radius acl)");
1085                         ieee80211_notify_node_auth(ni);
1086                         return;
1087                 }
1088                 break;
1089         case IEEE80211_AUTH_SHARED_RESPONSE:
1090                 if (ni == vap->iv_bss) {
1091                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1092                             ni->ni_macaddr, "shared key response",
1093                             "%s", "unknown station");
1094                         /* NB: don't send a response */
1095                         return;
1096                 }
1097                 if (ni->ni_challenge == NULL) {
1098                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1099                             ni->ni_macaddr, "shared key response",
1100                             "%s", "no challenge recorded");
1101                         vap->iv_stats.is_rx_bad_auth++;
1102                         estatus = IEEE80211_STATUS_CHALLENGE;
1103                         goto bad;
1104                 }
1105                 if (memcmp(ni->ni_challenge, &challenge[2],
1106                            challenge[1]) != 0) {
1107                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1108                             ni->ni_macaddr, "shared key response",
1109                             "%s", "challenge mismatch");
1110                         vap->iv_stats.is_rx_auth_fail++;
1111                         estatus = IEEE80211_STATUS_CHALLENGE;
1112                         goto bad;
1113                 }
1114                 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH,
1115                     ni, "%s", "station authenticated (shared key)");
1116                 ieee80211_node_authorize(ni);
1117                 break;
1118         default:
1119                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1120                     ni->ni_macaddr, "shared key auth",
1121                     "bad seq %d", seq);
1122                 vap->iv_stats.is_rx_bad_auth++;
1123                 estatus = IEEE80211_STATUS_SEQUENCE;
1124                 goto bad;
1125         }
1126         IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1);
1127         return;
1128 bad:
1129         /*
1130          * Send an error response; but only when operating as an AP.
1131          */
1132         /* XXX hack to workaround calling convention */
1133         ieee80211_send_error(ni, wh->i_addr2,
1134             IEEE80211_FC0_SUBTYPE_AUTH,
1135             (seq + 1) | (estatus<<16));
1136 }
1137
1138 /*
1139  * Convert a WPA cipher selector OUI to an internal
1140  * cipher algorithm.  Where appropriate we also
1141  * record any key length.
1142  */
1143 static int
1144 wpa_cipher(const uint8_t *sel, uint8_t *keylen)
1145 {
1146 #define WPA_SEL(x)      (((x)<<24)|WPA_OUI)
1147         uint32_t w = LE_READ_4(sel);
1148
1149         switch (w) {
1150         case WPA_SEL(WPA_CSE_NULL):
1151                 return IEEE80211_CIPHER_NONE;
1152         case WPA_SEL(WPA_CSE_WEP40):
1153                 if (keylen)
1154                         *keylen = 40 / NBBY;
1155                 return IEEE80211_CIPHER_WEP;
1156         case WPA_SEL(WPA_CSE_WEP104):
1157                 if (keylen)
1158                         *keylen = 104 / NBBY;
1159                 return IEEE80211_CIPHER_WEP;
1160         case WPA_SEL(WPA_CSE_TKIP):
1161                 return IEEE80211_CIPHER_TKIP;
1162         case WPA_SEL(WPA_CSE_CCMP):
1163                 return IEEE80211_CIPHER_AES_CCM;
1164         }
1165         return 32;              /* NB: so 1<< is discarded */
1166 #undef WPA_SEL
1167 }
1168
1169 /*
1170  * Convert a WPA key management/authentication algorithm
1171  * to an internal code.
1172  */
1173 static int
1174 wpa_keymgmt(const uint8_t *sel)
1175 {
1176 #define WPA_SEL(x)      (((x)<<24)|WPA_OUI)
1177         uint32_t w = LE_READ_4(sel);
1178
1179         switch (w) {
1180         case WPA_SEL(WPA_ASE_8021X_UNSPEC):
1181                 return WPA_ASE_8021X_UNSPEC;
1182         case WPA_SEL(WPA_ASE_8021X_PSK):
1183                 return WPA_ASE_8021X_PSK;
1184         case WPA_SEL(WPA_ASE_NONE):
1185                 return WPA_ASE_NONE;
1186         }
1187         return 0;               /* NB: so is discarded */
1188 #undef WPA_SEL
1189 }
1190
1191 /*
1192  * Parse a WPA information element to collect parameters.
1193  * Note that we do not validate security parameters; that
1194  * is handled by the authenticator; the parsing done here
1195  * is just for internal use in making operational decisions.
1196  */
1197 static int
1198 ieee80211_parse_wpa(struct ieee80211vap *vap, const uint8_t *frm,
1199         struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh)
1200 {
1201         uint8_t len = frm[1];
1202         uint32_t w;
1203         int n;
1204
1205         /*
1206          * Check the length once for fixed parts: OUI, type,
1207          * version, mcast cipher, and 2 selector counts.
1208          * Other, variable-length data, must be checked separately.
1209          */
1210         if ((vap->iv_flags & IEEE80211_F_WPA1) == 0) {
1211                 IEEE80211_DISCARD_IE(vap,
1212                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1213                     wh, "WPA", "not WPA, flags 0x%x", vap->iv_flags);
1214                 return IEEE80211_REASON_IE_INVALID;
1215         }
1216         if (len < 14) {
1217                 IEEE80211_DISCARD_IE(vap,
1218                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1219                     wh, "WPA", "too short, len %u", len);
1220                 return IEEE80211_REASON_IE_INVALID;
1221         }
1222         frm += 6, len -= 4;             /* NB: len is payload only */
1223         /* NB: iswapoui already validated the OUI and type */
1224         w = LE_READ_2(frm);
1225         if (w != WPA_VERSION) {
1226                 IEEE80211_DISCARD_IE(vap,
1227                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1228                     wh, "WPA", "bad version %u", w);
1229                 return IEEE80211_REASON_IE_INVALID;
1230         }
1231         frm += 2, len -= 2;
1232
1233         memset(rsn, 0, sizeof(*rsn));
1234
1235         /* multicast/group cipher */
1236         rsn->rsn_mcastcipher = wpa_cipher(frm, &rsn->rsn_mcastkeylen);
1237         frm += 4, len -= 4;
1238
1239         /* unicast ciphers */
1240         n = LE_READ_2(frm);
1241         frm += 2, len -= 2;
1242         if (len < n*4+2) {
1243                 IEEE80211_DISCARD_IE(vap,
1244                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1245                     wh, "WPA", "ucast cipher data too short; len %u, n %u",
1246                     len, n);
1247                 return IEEE80211_REASON_IE_INVALID;
1248         }
1249         w = 0;
1250         for (; n > 0; n--) {
1251                 w |= 1<<wpa_cipher(frm, &rsn->rsn_ucastkeylen);
1252                 frm += 4, len -= 4;
1253         }
1254         if (w & (1<<IEEE80211_CIPHER_TKIP))
1255                 rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP;
1256         else
1257                 rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM;
1258
1259         /* key management algorithms */
1260         n = LE_READ_2(frm);
1261         frm += 2, len -= 2;
1262         if (len < n*4) {
1263                 IEEE80211_DISCARD_IE(vap,
1264                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1265                     wh, "WPA", "key mgmt alg data too short; len %u, n %u",
1266                     len, n);
1267                 return IEEE80211_REASON_IE_INVALID;
1268         }
1269         w = 0;
1270         for (; n > 0; n--) {
1271                 w |= wpa_keymgmt(frm);
1272                 frm += 4, len -= 4;
1273         }
1274         if (w & WPA_ASE_8021X_UNSPEC)
1275                 rsn->rsn_keymgmt = WPA_ASE_8021X_UNSPEC;
1276         else
1277                 rsn->rsn_keymgmt = WPA_ASE_8021X_PSK;
1278
1279         if (len > 2)            /* optional capabilities */
1280                 rsn->rsn_caps = LE_READ_2(frm);
1281
1282         return 0;
1283 }
1284
1285 /*
1286  * Convert an RSN cipher selector OUI to an internal
1287  * cipher algorithm.  Where appropriate we also
1288  * record any key length.
1289  */
1290 static int
1291 rsn_cipher(const uint8_t *sel, uint8_t *keylen)
1292 {
1293 #define RSN_SEL(x)      (((x)<<24)|RSN_OUI)
1294         uint32_t w = LE_READ_4(sel);
1295
1296         switch (w) {
1297         case RSN_SEL(RSN_CSE_NULL):
1298                 return IEEE80211_CIPHER_NONE;
1299         case RSN_SEL(RSN_CSE_WEP40):
1300                 if (keylen)
1301                         *keylen = 40 / NBBY;
1302                 return IEEE80211_CIPHER_WEP;
1303         case RSN_SEL(RSN_CSE_WEP104):
1304                 if (keylen)
1305                         *keylen = 104 / NBBY;
1306                 return IEEE80211_CIPHER_WEP;
1307         case RSN_SEL(RSN_CSE_TKIP):
1308                 return IEEE80211_CIPHER_TKIP;
1309         case RSN_SEL(RSN_CSE_CCMP):
1310                 return IEEE80211_CIPHER_AES_CCM;
1311         case RSN_SEL(RSN_CSE_WRAP):
1312                 return IEEE80211_CIPHER_AES_OCB;
1313         }
1314         return 32;              /* NB: so 1<< is discarded */
1315 #undef WPA_SEL
1316 }
1317
1318 /*
1319  * Convert an RSN key management/authentication algorithm
1320  * to an internal code.
1321  */
1322 static int
1323 rsn_keymgmt(const uint8_t *sel)
1324 {
1325 #define RSN_SEL(x)      (((x)<<24)|RSN_OUI)
1326         uint32_t w = LE_READ_4(sel);
1327
1328         switch (w) {
1329         case RSN_SEL(RSN_ASE_8021X_UNSPEC):
1330                 return RSN_ASE_8021X_UNSPEC;
1331         case RSN_SEL(RSN_ASE_8021X_PSK):
1332                 return RSN_ASE_8021X_PSK;
1333         case RSN_SEL(RSN_ASE_NONE):
1334                 return RSN_ASE_NONE;
1335         }
1336         return 0;               /* NB: so is discarded */
1337 #undef RSN_SEL
1338 }
1339
1340 /*
1341  * Parse a WPA/RSN information element to collect parameters
1342  * and validate the parameters against what has been
1343  * configured for the system.
1344  */
1345 static int
1346 ieee80211_parse_rsn(struct ieee80211vap *vap, const uint8_t *frm,
1347         struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh)
1348 {
1349         uint8_t len = frm[1];
1350         uint32_t w;
1351         int n;
1352
1353         /*
1354          * Check the length once for fixed parts:
1355          * version, mcast cipher, and 2 selector counts.
1356          * Other, variable-length data, must be checked separately.
1357          */
1358         if ((vap->iv_flags & IEEE80211_F_WPA2) == 0) {
1359                 IEEE80211_DISCARD_IE(vap,
1360                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1361                     wh, "WPA", "not RSN, flags 0x%x", vap->iv_flags);
1362                 return IEEE80211_REASON_IE_INVALID;
1363         }
1364         if (len < 10) {
1365                 IEEE80211_DISCARD_IE(vap,
1366                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1367                     wh, "RSN", "too short, len %u", len);
1368                 return IEEE80211_REASON_IE_INVALID;
1369         }
1370         frm += 2;
1371         w = LE_READ_2(frm);
1372         if (w != RSN_VERSION) {
1373                 IEEE80211_DISCARD_IE(vap,
1374                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1375                     wh, "RSN", "bad version %u", w);
1376                 return IEEE80211_REASON_IE_INVALID;
1377         }
1378         frm += 2, len -= 2;
1379
1380         memset(rsn, 0, sizeof(*rsn));
1381
1382         /* multicast/group cipher */
1383         rsn->rsn_mcastcipher = rsn_cipher(frm, &rsn->rsn_mcastkeylen);
1384         frm += 4, len -= 4;
1385
1386         /* unicast ciphers */
1387         n = LE_READ_2(frm);
1388         frm += 2, len -= 2;
1389         if (len < n*4+2) {
1390                 IEEE80211_DISCARD_IE(vap,
1391                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1392                     wh, "RSN", "ucast cipher data too short; len %u, n %u",
1393                     len, n);
1394                 return IEEE80211_REASON_IE_INVALID;
1395         }
1396         w = 0;
1397         for (; n > 0; n--) {
1398                 w |= 1<<rsn_cipher(frm, &rsn->rsn_ucastkeylen);
1399                 frm += 4, len -= 4;
1400         }
1401         if (w & (1<<IEEE80211_CIPHER_TKIP))
1402                 rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP;
1403         else
1404                 rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM;
1405
1406         /* key management algorithms */
1407         n = LE_READ_2(frm);
1408         frm += 2, len -= 2;
1409         if (len < n*4) {
1410                 IEEE80211_DISCARD_IE(vap,
1411                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1412                     wh, "RSN", "key mgmt alg data too short; len %u, n %u",
1413                     len, n);
1414                 return IEEE80211_REASON_IE_INVALID;
1415         }
1416         w = 0;
1417         for (; n > 0; n--) {
1418                 w |= rsn_keymgmt(frm);
1419                 frm += 4, len -= 4;
1420         }
1421         if (w & RSN_ASE_8021X_UNSPEC)
1422                 rsn->rsn_keymgmt = RSN_ASE_8021X_UNSPEC;
1423         else
1424                 rsn->rsn_keymgmt = RSN_ASE_8021X_PSK;
1425
1426         /* optional RSN capabilities */
1427         if (len > 2)
1428                 rsn->rsn_caps = LE_READ_2(frm);
1429         /* XXXPMKID */
1430
1431         return 0;
1432 }
1433
1434 /*
1435  * WPA/802.11i assocation request processing.
1436  */
1437 static int
1438 wpa_assocreq(struct ieee80211_node *ni, struct ieee80211_rsnparms *rsnparms,
1439         const struct ieee80211_frame *wh, const uint8_t *wpa,
1440         const uint8_t *rsn, uint16_t capinfo)
1441 {
1442         struct ieee80211vap *vap = ni->ni_vap;
1443         uint8_t reason;
1444         int badwparsn;
1445
1446         ni->ni_flags &= ~(IEEE80211_NODE_WPS|IEEE80211_NODE_TSN);
1447         if (wpa == NULL && rsn == NULL) {
1448                 if (vap->iv_flags_ext & IEEE80211_FEXT_WPS) {
1449                         /*
1450                          * W-Fi Protected Setup (WPS) permits
1451                          * clients to associate and pass EAPOL frames
1452                          * to establish initial credentials.
1453                          */
1454                         ni->ni_flags |= IEEE80211_NODE_WPS;
1455                         return 1;
1456                 }
1457                 if ((vap->iv_flags_ext & IEEE80211_FEXT_TSN) &&
1458                     (capinfo & IEEE80211_CAPINFO_PRIVACY)) {
1459                         /*
1460                          * Transitional Security Network.  Permits clients
1461                          * to associate and use WEP while WPA is configured.
1462                          */
1463                         ni->ni_flags |= IEEE80211_NODE_TSN;
1464                         return 1;
1465                 }
1466                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA,
1467                     wh, NULL, "%s", "no WPA/RSN IE in association request");
1468                 vap->iv_stats.is_rx_assoc_badwpaie++;
1469                 reason = IEEE80211_REASON_IE_INVALID;
1470                 goto bad;
1471         }
1472         /* assert right association security credentials */
1473         badwparsn = 0;                  /* NB: to silence compiler */
1474         switch (vap->iv_flags & IEEE80211_F_WPA) {
1475         case IEEE80211_F_WPA1:
1476                 badwparsn = (wpa == NULL);
1477                 break;
1478         case IEEE80211_F_WPA2:
1479                 badwparsn = (rsn == NULL);
1480                 break;
1481         case IEEE80211_F_WPA1|IEEE80211_F_WPA2:
1482                 badwparsn = (wpa == NULL && rsn == NULL);
1483                 break;
1484         }
1485         if (badwparsn) {
1486                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA,
1487                     wh, NULL,
1488                     "%s", "missing WPA/RSN IE in association request");
1489                 vap->iv_stats.is_rx_assoc_badwpaie++;
1490                 reason = IEEE80211_REASON_IE_INVALID;
1491                 goto bad;
1492         }
1493         /*
1494          * Parse WPA/RSN information element.
1495          */
1496         if (wpa != NULL)
1497                 reason = ieee80211_parse_wpa(vap, wpa, rsnparms, wh);
1498         else
1499                 reason = ieee80211_parse_rsn(vap, rsn, rsnparms, wh);
1500         if (reason != 0) {
1501                 /* XXX distinguish WPA/RSN? */
1502                 vap->iv_stats.is_rx_assoc_badwpaie++;
1503                 goto bad;
1504         }
1505         IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, ni,
1506             "%s ie: mc %u/%u uc %u/%u key %u caps 0x%x",
1507             wpa != NULL ? "WPA" : "RSN",
1508             rsnparms->rsn_mcastcipher, rsnparms->rsn_mcastkeylen,
1509             rsnparms->rsn_ucastcipher, rsnparms->rsn_ucastkeylen,
1510             rsnparms->rsn_keymgmt, rsnparms->rsn_caps);
1511
1512         return 1;
1513 bad:
1514         ieee80211_node_deauth(ni, reason);
1515         return 0;
1516 }
1517
1518 /* XXX find a better place for definition */
1519 struct l2_update_frame {
1520         struct ether_header eh;
1521         uint8_t dsap;
1522         uint8_t ssap;
1523         uint8_t control;
1524         uint8_t xid[3];
1525 }  __packed;
1526
1527 /*
1528  * Deliver a TGf L2UF frame on behalf of a station.
1529  * This primes any bridge when the station is roaming
1530  * between ap's on the same wired network.
1531  */
1532 static void
1533 ieee80211_deliver_l2uf(struct ieee80211_node *ni)
1534 {
1535         struct ieee80211vap *vap = ni->ni_vap;
1536         struct ifnet *ifp = vap->iv_ifp;
1537         struct mbuf *m;
1538         struct l2_update_frame *l2uf;
1539         struct ether_header *eh;
1540
1541         m = m_gethdr(M_NOWAIT, MT_DATA);
1542         if (m == NULL) {
1543                 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
1544                     "%s", "no mbuf for l2uf frame");
1545                 vap->iv_stats.is_rx_nobuf++;    /* XXX not right */
1546                 return;
1547         }
1548         l2uf = mtod(m, struct l2_update_frame *);
1549         eh = &l2uf->eh;
1550         /* dst: Broadcast address */
1551         IEEE80211_ADDR_COPY(eh->ether_dhost, ifp->if_broadcastaddr);
1552         /* src: associated STA */
1553         IEEE80211_ADDR_COPY(eh->ether_shost, ni->ni_macaddr);
1554         eh->ether_type = htons(sizeof(*l2uf) - sizeof(*eh));
1555
1556         l2uf->dsap = 0;
1557         l2uf->ssap = 0;
1558         l2uf->control = 0xf5;
1559         l2uf->xid[0] = 0x81;
1560         l2uf->xid[1] = 0x80;
1561         l2uf->xid[2] = 0x00;
1562
1563         m->m_pkthdr.len = m->m_len = sizeof(*l2uf);
1564         hostap_deliver_data(vap, ni, m);
1565 }
1566
1567 static void
1568 ratesetmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1569         int reassoc, int resp, const char *tag, int rate)
1570 {
1571         IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2,
1572             "deny %s request, %s rate set mismatch, rate/MCS %d",
1573             reassoc ? "reassoc" : "assoc", tag, rate & IEEE80211_RATE_VAL);
1574         IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_BASIC_RATE);
1575         ieee80211_node_leave(ni);
1576 }
1577
1578 static void
1579 capinfomismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1580         int reassoc, int resp, const char *tag, int capinfo)
1581 {
1582         struct ieee80211vap *vap = ni->ni_vap;
1583
1584         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2,
1585             "deny %s request, %s mismatch 0x%x",
1586             reassoc ? "reassoc" : "assoc", tag, capinfo);
1587         IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_CAPINFO);
1588         ieee80211_node_leave(ni);
1589         vap->iv_stats.is_rx_assoc_capmismatch++;
1590 }
1591
1592 static void
1593 htcapmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1594         int reassoc, int resp)
1595 {
1596         IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2,
1597             "deny %s request, %s missing HT ie", reassoc ? "reassoc" : "assoc");
1598         /* XXX no better code */
1599         IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_OTHER);
1600         ieee80211_node_leave(ni);
1601 }
1602
1603 static void
1604 authalgreject(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1605         int algo, int seq, int status)
1606 {
1607         struct ieee80211vap *vap = ni->ni_vap;
1608
1609         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1610             wh, NULL, "unsupported alg %d", algo);
1611         vap->iv_stats.is_rx_auth_unsupported++;
1612         ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_AUTH,
1613             seq | (status << 16));
1614 }
1615
1616 static __inline int
1617 ishtmixed(const uint8_t *ie)
1618 {
1619         const struct ieee80211_ie_htinfo *ht =
1620             (const struct ieee80211_ie_htinfo *) ie;
1621         return (ht->hi_byte2 & IEEE80211_HTINFO_OPMODE) ==
1622             IEEE80211_HTINFO_OPMODE_MIXED;
1623 }
1624
1625 static int
1626 is11bclient(const uint8_t *rates, const uint8_t *xrates)
1627 {
1628         static const uint32_t brates = (1<<2*1)|(1<<2*2)|(1<<11)|(1<<2*11);
1629         int i;
1630
1631         /* NB: the 11b clients we care about will not have xrates */
1632         if (xrates != NULL || rates == NULL)
1633                 return 0;
1634         for (i = 0; i < rates[1]; i++) {
1635                 int r = rates[2+i] & IEEE80211_RATE_VAL;
1636                 if (r > 2*11 || ((1<<r) & brates) == 0)
1637                         return 0;
1638         }
1639         return 1;
1640 }
1641
1642 static void
1643 hostap_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0,
1644         int subtype, int rssi, int noise, uint32_t rstamp)
1645 {
1646         struct ieee80211vap *vap = ni->ni_vap;
1647         struct ieee80211com *ic = ni->ni_ic;
1648         struct ieee80211_frame *wh;
1649         uint8_t *frm, *efrm, *sfrm;
1650         uint8_t *ssid, *rates, *xrates, *wpa, *rsn, *wme, *ath, *htcap;
1651         int reassoc, resp;
1652         uint8_t rate;
1653
1654         wh = mtod(m0, struct ieee80211_frame *);
1655         frm = (uint8_t *)&wh[1];
1656         efrm = mtod(m0, uint8_t *) + m0->m_len;
1657         switch (subtype) {
1658         case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1659         case IEEE80211_FC0_SUBTYPE_BEACON: {
1660                 struct ieee80211_scanparams scan;
1661                 /*
1662                  * We process beacon/probe response frames when scanning;
1663                  * otherwise we check beacon frames for overlapping non-ERP
1664                  * BSS in 11g and/or overlapping legacy BSS when in HT.
1665                  */
1666                 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0 &&
1667                     subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) {
1668                         vap->iv_stats.is_rx_mgtdiscard++;
1669                         return;
1670                 }
1671                 /* NB: accept off-channel frames */
1672                 if (ieee80211_parse_beacon(ni, m0, &scan) &~ IEEE80211_BPARSE_OFFCHAN)
1673                         return;
1674                 /*
1675                  * Count frame now that we know it's to be processed.
1676                  */
1677                 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1678                         vap->iv_stats.is_rx_beacon++;           /* XXX remove */
1679                         IEEE80211_NODE_STAT(ni, rx_beacons);
1680                 } else
1681                         IEEE80211_NODE_STAT(ni, rx_proberesp);
1682                 /*
1683                  * If scanning, just pass information to the scan module.
1684                  */
1685                 if (ic->ic_flags & IEEE80211_F_SCAN) {
1686                         if (scan.status == 0 &&         /* NB: on channel */
1687                             (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN)) {
1688                                 /*
1689                                  * Actively scanning a channel marked passive;
1690                                  * send a probe request now that we know there
1691                                  * is 802.11 traffic present.
1692                                  *
1693                                  * XXX check if the beacon we recv'd gives
1694                                  * us what we need and suppress the probe req
1695                                  */
1696                                 ieee80211_probe_curchan(vap, 1);
1697                                 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1698                         }
1699                         ieee80211_add_scan(vap, &scan, wh,
1700                                 subtype, rssi, noise, rstamp);
1701                         return;
1702                 }
1703                 /*
1704                  * Check beacon for overlapping bss w/ non ERP stations.
1705                  * If we detect one and protection is configured but not
1706                  * enabled, enable it and start a timer that'll bring us
1707                  * out if we stop seeing the bss.
1708                  */
1709                 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
1710                     scan.status == 0 &&                 /* NB: on-channel */
1711                     ((scan.erp & 0x100) == 0 ||         /* NB: no ERP, 11b sta*/
1712                      (scan.erp & IEEE80211_ERP_NON_ERP_PRESENT))) {
1713                         ic->ic_lastnonerp = ticks;
1714                         ic->ic_flags_ext |= IEEE80211_FEXT_NONERP_PR;
1715                         if (ic->ic_protmode != IEEE80211_PROT_NONE &&
1716                             (ic->ic_flags & IEEE80211_F_USEPROT) == 0) {
1717                                 IEEE80211_NOTE_FRAME(vap,
1718                                     IEEE80211_MSG_ASSOC, wh,
1719                                     "non-ERP present on channel %d "
1720                                     "(saw erp 0x%x from channel %d), "
1721                                     "enable use of protection",
1722                                     ic->ic_curchan->ic_ieee,
1723                                     scan.erp, scan.chan);
1724                                 ic->ic_flags |= IEEE80211_F_USEPROT;
1725                                 ieee80211_notify_erp(ic);
1726                         }
1727                 }
1728                 /*
1729                  * Check beacon for non-HT station on HT channel
1730                  * and update HT BSS occupancy as appropriate.
1731                  */
1732                 if (IEEE80211_IS_CHAN_HT(ic->ic_curchan)) {
1733                         if (scan.status & IEEE80211_BPARSE_OFFCHAN) {
1734                                 /*
1735                                  * Off control channel; only check frames
1736                                  * that come in the extension channel when
1737                                  * operating w/ HT40.
1738                                  */
1739                                 if (!IEEE80211_IS_CHAN_HT40(ic->ic_curchan))
1740                                         break;
1741                                 if (scan.chan != ic->ic_curchan->ic_extieee)
1742                                         break;
1743                         }
1744                         if (scan.htinfo == NULL) {
1745                                 ieee80211_htprot_update(ic,
1746                                     IEEE80211_HTINFO_OPMODE_PROTOPT |
1747                                     IEEE80211_HTINFO_NONHT_PRESENT);
1748                         } else if (ishtmixed(scan.htinfo)) {
1749                                 /* XXX? take NONHT_PRESENT from beacon? */
1750                                 ieee80211_htprot_update(ic,
1751                                     IEEE80211_HTINFO_OPMODE_MIXED |
1752                                     IEEE80211_HTINFO_NONHT_PRESENT);
1753                         }
1754                 }
1755                 break;
1756         }
1757
1758         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1759                 if (vap->iv_state != IEEE80211_S_RUN) {
1760                         vap->iv_stats.is_rx_mgtdiscard++;
1761                         return;
1762                 }
1763                 /*
1764                  * prreq frame format
1765                  *      [tlv] ssid
1766                  *      [tlv] supported rates
1767                  *      [tlv] extended supported rates
1768                  */
1769                 ssid = rates = xrates = NULL;
1770                 sfrm = frm;
1771                 while (efrm - frm > 1) {
1772                         IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1773                         switch (*frm) {
1774                         case IEEE80211_ELEMID_SSID:
1775                                 ssid = frm;
1776                                 break;
1777                         case IEEE80211_ELEMID_RATES:
1778                                 rates = frm;
1779                                 break;
1780                         case IEEE80211_ELEMID_XRATES:
1781                                 xrates = frm;
1782                                 break;
1783                         }
1784                         frm += frm[1] + 2;
1785                 }
1786                 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
1787                 if (xrates != NULL)
1788                         IEEE80211_VERIFY_ELEMENT(xrates,
1789                                 IEEE80211_RATE_MAXSIZE - rates[1], return);
1790                 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
1791                 IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return);
1792                 if ((vap->iv_flags & IEEE80211_F_HIDESSID) && ssid[1] == 0) {
1793                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1794                             wh, NULL,
1795                             "%s", "no ssid with ssid suppression enabled");
1796                         vap->iv_stats.is_rx_ssidmismatch++; /*XXX*/
1797                         return;
1798                 }
1799
1800                 /* XXX find a better class or define it's own */
1801                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
1802                     "%s", "recv probe req");
1803                 /*
1804                  * Some legacy 11b clients cannot hack a complete
1805                  * probe response frame.  When the request includes
1806                  * only a bare-bones rate set, communicate this to
1807                  * the transmit side.
1808                  */
1809                 ieee80211_send_proberesp(vap, wh->i_addr2,
1810                     is11bclient(rates, xrates) ? IEEE80211_SEND_LEGACY_11B : 0);
1811                 break;
1812
1813         case IEEE80211_FC0_SUBTYPE_AUTH: {
1814                 uint16_t algo, seq, status;
1815
1816                 if (vap->iv_state != IEEE80211_S_RUN) {
1817                         vap->iv_stats.is_rx_mgtdiscard++;
1818                         return;
1819                 }
1820                 if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) {
1821                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1822                             wh, NULL, "%s", "wrong bssid");
1823                         vap->iv_stats.is_rx_wrongbss++; /*XXX unique stat?*/
1824                         return;
1825                 }
1826                 /*
1827                  * auth frame format
1828                  *      [2] algorithm
1829                  *      [2] sequence
1830                  *      [2] status
1831                  *      [tlv*] challenge
1832                  */
1833                 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return);
1834                 algo   = le16toh(*(uint16_t *)frm);
1835                 seq    = le16toh(*(uint16_t *)(frm + 2));
1836                 status = le16toh(*(uint16_t *)(frm + 4));
1837                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2,
1838                     "recv auth frame with algorithm %d seq %d", algo, seq);
1839                 /*
1840                  * Consult the ACL policy module if setup.
1841                  */
1842                 if (vap->iv_acl != NULL &&
1843                     !vap->iv_acl->iac_check(vap, wh->i_addr2)) {
1844                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1845                             wh, NULL, "%s", "disallowed by ACL");
1846                         vap->iv_stats.is_rx_acl++;
1847                         ieee80211_send_error(ni, wh->i_addr2,
1848                             IEEE80211_FC0_SUBTYPE_AUTH,
1849                             (seq+1) | (IEEE80211_STATUS_UNSPECIFIED<<16));
1850                         return;
1851                 }
1852                 if (vap->iv_flags & IEEE80211_F_COUNTERM) {
1853                         IEEE80211_DISCARD(vap,
1854                             IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO,
1855                             wh, NULL, "%s", "TKIP countermeasures enabled");
1856                         vap->iv_stats.is_rx_auth_countermeasures++;
1857                         ieee80211_send_error(ni, wh->i_addr2,
1858                                 IEEE80211_FC0_SUBTYPE_AUTH,
1859                                 IEEE80211_REASON_MIC_FAILURE);
1860                         return;
1861                 }
1862                 if (algo == IEEE80211_AUTH_ALG_SHARED)
1863                         hostap_auth_shared(ni, wh, frm + 6, efrm, rssi,
1864                             noise, rstamp, seq, status);
1865                 else if (algo == IEEE80211_AUTH_ALG_OPEN)
1866                         hostap_auth_open(ni, wh, rssi, noise, rstamp,
1867                             seq, status);
1868                 else if (algo == IEEE80211_AUTH_ALG_LEAP) {
1869                         authalgreject(ni, wh, algo,
1870                             seq+1, IEEE80211_STATUS_ALG);
1871                         return;
1872                 } else {
1873                         /*
1874                          * We assume that an unknown algorithm is the result
1875                          * of a decryption failure on a shared key auth frame;
1876                          * return a status code appropriate for that instead
1877                          * of IEEE80211_STATUS_ALG.
1878                          *
1879                          * NB: a seq# of 4 is intentional; the decrypted
1880                          *     frame likely has a bogus seq value.
1881                          */
1882                         authalgreject(ni, wh, algo,
1883                             4, IEEE80211_STATUS_CHALLENGE);
1884                         return;
1885                 }
1886                 break;
1887         }
1888
1889         case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
1890         case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: {
1891                 uint16_t capinfo, lintval;
1892                 struct ieee80211_rsnparms rsnparms;
1893
1894                 if (vap->iv_state != IEEE80211_S_RUN) {
1895                         vap->iv_stats.is_rx_mgtdiscard++;
1896                         return;
1897                 }
1898                 if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) {
1899                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1900                             wh, NULL, "%s", "wrong bssid");
1901                         vap->iv_stats.is_rx_assoc_bss++;
1902                         return;
1903                 }
1904                 if (subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) {
1905                         reassoc = 1;
1906                         resp = IEEE80211_FC0_SUBTYPE_REASSOC_RESP;
1907                 } else {
1908                         reassoc = 0;
1909                         resp = IEEE80211_FC0_SUBTYPE_ASSOC_RESP;
1910                 }
1911                 if (ni == vap->iv_bss) {
1912                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2,
1913                             "deny %s request, sta not authenticated",
1914                             reassoc ? "reassoc" : "assoc");
1915                         ieee80211_send_error(ni, wh->i_addr2,
1916                             IEEE80211_FC0_SUBTYPE_DEAUTH,
1917                             IEEE80211_REASON_ASSOC_NOT_AUTHED);
1918                         vap->iv_stats.is_rx_assoc_notauth++;
1919                         return;
1920                 }
1921
1922                 /*
1923                  * asreq frame format
1924                  *      [2] capability information
1925                  *      [2] listen interval
1926                  *      [6*] current AP address (reassoc only)
1927                  *      [tlv] ssid
1928                  *      [tlv] supported rates
1929                  *      [tlv] extended supported rates
1930                  *      [tlv] WPA or RSN
1931                  *      [tlv] HT capabilities
1932                  *      [tlv] Atheros capabilities
1933                  */
1934                 IEEE80211_VERIFY_LENGTH(efrm - frm, (reassoc ? 10 : 4), return);
1935                 capinfo = le16toh(*(uint16_t *)frm);    frm += 2;
1936                 lintval = le16toh(*(uint16_t *)frm);    frm += 2;
1937                 if (reassoc)
1938                         frm += 6;       /* ignore current AP info */
1939                 ssid = rates = xrates = wpa = rsn = wme = ath = htcap = NULL;
1940                 sfrm = frm;
1941                 while (efrm - frm > 1) {
1942                         IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1943                         switch (*frm) {
1944                         case IEEE80211_ELEMID_SSID:
1945                                 ssid = frm;
1946                                 break;
1947                         case IEEE80211_ELEMID_RATES:
1948                                 rates = frm;
1949                                 break;
1950                         case IEEE80211_ELEMID_XRATES:
1951                                 xrates = frm;
1952                                 break;
1953                         case IEEE80211_ELEMID_RSN:
1954                                 rsn = frm;
1955                                 break;
1956                         case IEEE80211_ELEMID_HTCAP:
1957                                 htcap = frm;
1958                                 break;
1959                         case IEEE80211_ELEMID_VENDOR:
1960                                 if (iswpaoui(frm))
1961                                         wpa = frm;
1962                                 else if (iswmeinfo(frm))
1963                                         wme = frm;
1964                                 else if (isatherosoui(frm))
1965                                         ath = frm;
1966                                 else if (vap->iv_flags_ext & IEEE80211_FEXT_HTCOMPAT) {
1967                                         if (ishtcapoui(frm) && htcap == NULL)
1968                                                 htcap = frm;
1969                                 }
1970                                 break;
1971                         }
1972                         frm += frm[1] + 2;
1973                 }
1974                 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
1975                 if (xrates != NULL)
1976                         IEEE80211_VERIFY_ELEMENT(xrates,
1977                                 IEEE80211_RATE_MAXSIZE - rates[1], return);
1978                 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
1979                 IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return);
1980                 if (htcap != NULL) {
1981                         IEEE80211_VERIFY_LENGTH(htcap[1],
1982                              htcap[0] == IEEE80211_ELEMID_VENDOR ?
1983                                  4 + sizeof(struct ieee80211_ie_htcap)-2 :
1984                                  sizeof(struct ieee80211_ie_htcap)-2,
1985                              return);           /* XXX just NULL out? */
1986                 }
1987
1988                 if ((vap->iv_flags & IEEE80211_F_WPA) &&
1989                     !wpa_assocreq(ni, &rsnparms, wh, wpa, rsn, capinfo))
1990                         return;
1991                 /* discard challenge after association */
1992                 if (ni->ni_challenge != NULL) {
1993                         FREE(ni->ni_challenge, M_80211_NODE);
1994                         ni->ni_challenge = NULL;
1995                 }
1996                 /* NB: 802.11 spec says to ignore station's privacy bit */
1997                 if ((capinfo & IEEE80211_CAPINFO_ESS) == 0) {
1998                         capinfomismatch(ni, wh, reassoc, resp,
1999                             "capability", capinfo);
2000                         return;
2001                 }
2002                 /*
2003                  * Disallow re-associate w/ invalid slot time setting.
2004                  */
2005                 if (ni->ni_associd != 0 &&
2006                     IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2007                     ((ni->ni_capinfo ^ capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME)) {
2008                         capinfomismatch(ni, wh, reassoc, resp,
2009                             "slot time", capinfo);
2010                         return;
2011                 }
2012                 rate = ieee80211_setup_rates(ni, rates, xrates,
2013                                 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
2014                                 IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
2015                 if (rate & IEEE80211_RATE_BASIC) {
2016                         ratesetmismatch(ni, wh, reassoc, resp, "legacy", rate);
2017                         vap->iv_stats.is_rx_assoc_norate++;
2018                         return;
2019                 }
2020                 /*
2021                  * If constrained to 11g-only stations reject an
2022                  * 11b-only station.  We cheat a bit here by looking
2023                  * at the max negotiated xmit rate and assuming anyone
2024                  * with a best rate <24Mb/s is an 11b station.
2025                  */
2026                 if ((vap->iv_flags & IEEE80211_F_PUREG) && rate < 48) {
2027                         ratesetmismatch(ni, wh, reassoc, resp, "11g", rate);
2028                         vap->iv_stats.is_rx_assoc_norate++;
2029                         return;
2030                 }
2031                 /*
2032                  * Do HT rate set handling and setup HT node state.
2033                  */
2034                 ni->ni_chan = vap->iv_bss->ni_chan;
2035                 if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && htcap != NULL) {
2036                         rate = ieee80211_setup_htrates(ni, htcap,
2037                                 IEEE80211_F_DOFMCS | IEEE80211_F_DONEGO |
2038                                 IEEE80211_F_DOBRS);
2039                         if (rate & IEEE80211_RATE_BASIC) {
2040                                 ratesetmismatch(ni, wh, reassoc, resp,
2041                                     "HT", rate);
2042                                 vap->iv_stats.is_ht_assoc_norate++;
2043                                 return;
2044                         }
2045                         ieee80211_ht_node_init(ni, htcap);
2046                 } else if (ni->ni_flags & IEEE80211_NODE_HT)
2047                         ieee80211_ht_node_cleanup(ni);
2048                 /*
2049                  * Allow AMPDU operation only with unencrypted traffic
2050                  * or AES-CCM; the 11n spec only specifies these ciphers
2051                  * so permitting any others is undefined and can lead
2052                  * to interoperability problems.
2053                  */
2054                 if ((ni->ni_flags & IEEE80211_NODE_HT) &&
2055                     (((vap->iv_flags & IEEE80211_F_WPA) &&
2056                       rsnparms.rsn_ucastcipher != IEEE80211_CIPHER_AES_CCM) ||
2057                      (vap->iv_flags & (IEEE80211_F_WPA|IEEE80211_F_PRIVACY)) == IEEE80211_F_PRIVACY)) {
2058                         IEEE80211_NOTE(vap,
2059                             IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni,
2060                             "disallow HT use because WEP or TKIP requested, "
2061                             "capinfo 0x%x ucastcipher %d", capinfo,
2062                             rsnparms.rsn_ucastcipher);
2063                         ieee80211_ht_node_cleanup(ni);
2064                         vap->iv_stats.is_ht_assoc_downgrade++;
2065                 }
2066                 /*
2067                  * If constrained to 11n-only stations reject legacy stations.
2068                  */
2069                 if ((vap->iv_flags_ext & IEEE80211_FEXT_PUREN) &&
2070                     (ni->ni_flags & IEEE80211_NODE_HT) == 0) {
2071                         htcapmismatch(ni, wh, reassoc, resp);
2072                         vap->iv_stats.is_ht_assoc_nohtcap++;
2073                         return;
2074                 }
2075                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
2076                 ni->ni_noise = noise;
2077                 ni->ni_rstamp = rstamp;
2078                 ni->ni_intval = lintval;
2079                 ni->ni_capinfo = capinfo;
2080                 ni->ni_fhdwell = vap->iv_bss->ni_fhdwell;
2081                 ni->ni_fhindex = vap->iv_bss->ni_fhindex;
2082                 /*
2083                  * Store the IEs.
2084                  * XXX maybe better to just expand
2085                  */
2086                 if (ieee80211_ies_init(&ni->ni_ies, sfrm, efrm - sfrm)) {
2087 #define setie(_ie, _off)        ieee80211_ies_setie(ni->ni_ies, _ie, _off)
2088                         if (wpa != NULL)
2089                                 setie(wpa_ie, wpa - sfrm);
2090                         if (rsn != NULL)
2091                                 setie(rsn_ie, rsn - sfrm);
2092                         if (htcap != NULL)
2093                                 setie(htcap_ie, htcap - sfrm);
2094                         if (wme != NULL) {
2095                                 setie(wme_ie, wme - sfrm);
2096                                 /*
2097                                  * Mark node as capable of QoS.
2098                                  */
2099                                 ni->ni_flags |= IEEE80211_NODE_QOS;
2100                         } else
2101                                 ni->ni_flags &= ~IEEE80211_NODE_QOS;
2102                         if (ath != NULL) {
2103                                 setie(ath_ie, ath - sfrm);
2104                                 /*
2105                                  * Parse ATH station parameters.
2106                                  */
2107                                 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
2108                         } else
2109                                 ni->ni_ath_flags = 0;
2110 #undef setie
2111                 } else {
2112                         ni->ni_flags &= ~IEEE80211_NODE_QOS;
2113                         ni->ni_ath_flags = 0;
2114                 }
2115                 ieee80211_node_join(ni, resp);
2116                 ieee80211_deliver_l2uf(ni);
2117                 break;
2118         }
2119
2120         case IEEE80211_FC0_SUBTYPE_DEAUTH:
2121         case IEEE80211_FC0_SUBTYPE_DISASSOC: {
2122                 uint16_t reason;
2123
2124                 if (vap->iv_state != IEEE80211_S_RUN ||
2125                     /* NB: can happen when in promiscuous mode */
2126                     !IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) {
2127                         vap->iv_stats.is_rx_mgtdiscard++;
2128                         break;
2129                 }
2130                 /*
2131                  * deauth/disassoc frame format
2132                  *      [2] reason
2133                  */
2134                 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return);
2135                 reason = le16toh(*(uint16_t *)frm);
2136                 if (subtype == IEEE80211_FC0_SUBTYPE_DEAUTH) {
2137                         vap->iv_stats.is_rx_deauth++;
2138                         IEEE80211_NODE_STAT(ni, rx_deauth);
2139                 } else {
2140                         vap->iv_stats.is_rx_disassoc++;
2141                         IEEE80211_NODE_STAT(ni, rx_disassoc);
2142                 }
2143                 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni,
2144                     "recv %s (reason %d)", ieee80211_mgt_subtype_name[subtype >>
2145                         IEEE80211_FC0_SUBTYPE_SHIFT], reason);
2146                 if (ni != vap->iv_bss)
2147                         ieee80211_node_leave(ni);
2148                 break;
2149         }
2150
2151         case IEEE80211_FC0_SUBTYPE_ACTION:
2152                 if (vap->iv_state == IEEE80211_S_RUN) {
2153                         if (ieee80211_parse_action(ni, m0) == 0)
2154                                 ic->ic_recv_action(ni, frm, efrm);
2155                 } else
2156                         vap->iv_stats.is_rx_mgtdiscard++;
2157                 break;
2158
2159         case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2160         case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2161         default:
2162                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2163                      wh, "mgt", "subtype 0x%x not handled", subtype);
2164                 vap->iv_stats.is_rx_badsubtype++;
2165                 break;
2166         }
2167 }
2168
2169 /*
2170  * Process a received ps-poll frame.
2171  */
2172 static void
2173 hostap_recv_pspoll(struct ieee80211_node *ni, struct mbuf *m0)
2174 {
2175         struct ieee80211vap *vap = ni->ni_vap;
2176         struct ieee80211_frame_min *wh;
2177         struct ifnet *ifp = vap->iv_ifp;
2178         struct mbuf *m;
2179         uint16_t aid;
2180         int qlen;
2181
2182         wh = mtod(m0, struct ieee80211_frame_min *);
2183         if (ni->ni_associd == 0) {
2184                 IEEE80211_DISCARD(vap,
2185                     IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG,
2186                     (struct ieee80211_frame *) wh, NULL,
2187                     "%s", "unassociated station");
2188                 vap->iv_stats.is_ps_unassoc++;
2189                 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH,
2190                         IEEE80211_REASON_NOT_ASSOCED);
2191                 return;
2192         }
2193
2194         aid = le16toh(*(uint16_t *)wh->i_dur);
2195         if (aid != ni->ni_associd) {
2196                 IEEE80211_DISCARD(vap,
2197                     IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG,
2198                     (struct ieee80211_frame *) wh, NULL,
2199                     "aid mismatch: sta aid 0x%x poll aid 0x%x",
2200                     ni->ni_associd, aid);
2201                 vap->iv_stats.is_ps_badaid++;
2202                 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH,
2203                         IEEE80211_REASON_NOT_ASSOCED);
2204                 return;
2205         }
2206
2207         /* Okay, take the first queued packet and put it out... */
2208         IEEE80211_NODE_SAVEQ_DEQUEUE(ni, m, qlen);
2209         if (m == NULL) {
2210                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_POWER, wh->i_addr2,
2211                     "%s", "recv ps-poll, but queue empty");
2212                 ieee80211_send_nulldata(ieee80211_ref_node(ni));
2213                 vap->iv_stats.is_ps_qempty++;   /* XXX node stat */
2214                 if (vap->iv_set_tim != NULL)
2215                         vap->iv_set_tim(ni, 0); /* just in case */
2216                 return;
2217         }
2218         /*
2219          * If there are more packets, set the more packets bit
2220          * in the packet dispatched to the station; otherwise
2221          * turn off the TIM bit.
2222          */
2223         if (qlen != 0) {
2224                 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
2225                     "recv ps-poll, send packet, %u still queued", qlen);
2226                 m->m_flags |= M_MORE_DATA;
2227         } else {
2228                 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
2229                     "%s", "recv ps-poll, send packet, queue empty");
2230                 if (vap->iv_set_tim != NULL)
2231                         vap->iv_set_tim(ni, 0);
2232         }
2233         m->m_flags |= M_PWR_SAV;                /* bypass PS handling */
2234         IF_ENQUEUE(&ifp->if_snd, m);
2235         if_start(ifp);
2236 }