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_var.h>
  52 #include <net/if_media.h>
  53 #include <net/if_llc.h>
  54 #include <net/ethernet.h>
  55
  56 #include <net/bpf.h>
  57
  58 #include <net80211/ieee80211_var.h>
  59 #include <net80211/ieee80211_hostap.h>
  60 #include <net80211/ieee80211_input.h>
  61 #ifdef IEEE80211_SUPPORT_SUPERG
  62 #include <net80211/ieee80211_superg.h>
  63 #endif
  64 #include <net80211/ieee80211_wds.h>
  65
  66 #define IEEE80211_RATE2MBS(r)   (((r) & IEEE80211_RATE_VAL) / 2)
  67
  68 static  void hostap_vattach(struct ieee80211vap *);
  69 static  int hostap_newstate(struct ieee80211vap *, enum ieee80211_state, int);
  70 static  int hostap_input(struct ieee80211_node *ni, struct mbuf *m,
  71             const struct ieee80211_rx_stats *,
  72             int rssi, int nf);
  73 static void hostap_deliver_data(struct ieee80211vap *,
  74             struct ieee80211_node *, struct mbuf *);
  75 static void hostap_recv_mgmt(struct ieee80211_node *, struct mbuf *,
  76             int subtype, const struct ieee80211_rx_stats *rxs, int rssi, int nf);
  77 static void hostap_recv_ctl(struct ieee80211_node *, struct mbuf *, int);
  78
  79 void
  80 ieee80211_hostap_attach(struct ieee80211com *ic)
  81 {
  82         ic->ic_vattach[IEEE80211_M_HOSTAP] = hostap_vattach;
  83 }
  84
  85 void
  86 ieee80211_hostap_detach(struct ieee80211com *ic)
  87 {
  88 }
  89
  90 static void
  91 hostap_vdetach(struct ieee80211vap *vap)
  92 {
  93 }
  94
  95 static void
  96 hostap_vattach(struct ieee80211vap *vap)
  97 {
  98         vap->iv_newstate = hostap_newstate;
  99         vap->iv_input = hostap_input;
 100         vap->iv_recv_mgmt = hostap_recv_mgmt;
 101         vap->iv_recv_ctl = hostap_recv_ctl;
 102         vap->iv_opdetach = hostap_vdetach;
 103         vap->iv_deliver_data = hostap_deliver_data;
 104         vap->iv_recv_pspoll = ieee80211_recv_pspoll;
 105 }
 106
 107 static void
 108 sta_disassoc(void *arg, struct ieee80211_node *ni)
 109 {
 110         struct ieee80211vap *vap = arg;
 111
 112         if (ni->ni_vap == vap && ni->ni_associd != 0) {
 113                 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DISASSOC,
 114                         IEEE80211_REASON_ASSOC_LEAVE);
 115                 ieee80211_node_leave(ni);
 116         }
 117 }
 118
 119 static void
 120 sta_csa(void *arg, struct ieee80211_node *ni)
 121 {
 122         struct ieee80211vap *vap = arg;
 123
 124         if (ni->ni_vap == vap && ni->ni_associd != 0)
 125                 if (ni->ni_inact > vap->iv_inact_init) {
 126                         ni->ni_inact = vap->iv_inact_init;
 127                         IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
 128                             "%s: inact %u", __func__, ni->ni_inact);
 129                 }
 130 }
 131
 132 static void
 133 sta_drop(void *arg, struct ieee80211_node *ni)
 134 {
 135         struct ieee80211vap *vap = arg;
 136
 137         if (ni->ni_vap == vap && ni->ni_associd != 0)
 138                 ieee80211_node_leave(ni);
 139 }
 140
 141 /*
 142  * Does a channel change require associated stations to re-associate
 143  * so protocol state is correct.  This is used when doing CSA across
 144  * bands or similar (e.g. HT -> legacy).
 145  */
 146 static int
 147 isbandchange(struct ieee80211com *ic)
 148 {
 149         return ((ic->ic_bsschan->ic_flags ^ ic->ic_csa_newchan->ic_flags) &
 150             (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_HALF |
 151              IEEE80211_CHAN_QUARTER | IEEE80211_CHAN_HT)) != 0;
 152 }
 153
 154 /*
 155  * IEEE80211_M_HOSTAP vap state machine handler.
 156  */
 157 static int
 158 hostap_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
 159 {
 160         struct ieee80211com *ic = vap->iv_ic;
 161         enum ieee80211_state ostate;
 162
 163         IEEE80211_LOCK_ASSERT(ic);
 164
 165         ostate = vap->iv_state;
 166         IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
 167             __func__, ieee80211_state_name[ostate],
 168             ieee80211_state_name[nstate], arg);
 169         vap->iv_state = nstate;                 /* state transition */
 170         if (ostate != IEEE80211_S_SCAN)
 171                 ieee80211_cancel_scan(vap);     /* background scan */
 172         switch (nstate) {
 173         case IEEE80211_S_INIT:
 174                 switch (ostate) {
 175                 case IEEE80211_S_SCAN:
 176                         ieee80211_cancel_scan(vap);
 177                         break;
 178                 case IEEE80211_S_CAC:
 179                         ieee80211_dfs_cac_stop(vap);
 180                         break;
 181                 case IEEE80211_S_RUN:
 182                         ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, vap);
 183                         break;
 184                 default:
 185                         break;
 186                 }
 187                 if (ostate != IEEE80211_S_INIT) {
 188                         /* NB: optimize INIT -> INIT case */
 189                         ieee80211_reset_bss(vap);
 190                 }
 191                 if (vap->iv_auth->ia_detach != NULL)
 192                         vap->iv_auth->ia_detach(vap);
 193                 break;
 194         case IEEE80211_S_SCAN:
 195                 switch (ostate) {
 196                 case IEEE80211_S_CSA:
 197                 case IEEE80211_S_RUN:
 198                         ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, vap);
 199                         /*
 200                          * Clear overlapping BSS state; the beacon frame
 201                          * will be reconstructed on transition to the RUN
 202                          * state and the timeout routines check if the flag
 203                          * is set before doing anything so this is sufficient.
 204                          */
 205                         ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR;
 206                         ic->ic_flags_ht &= ~IEEE80211_FHT_NONHT_PR;
 207                         /* fall thru... */
 208                 case IEEE80211_S_CAC:
 209                         /*
 210                          * NB: We may get here because of a manual channel
 211                          *     change in which case we need to stop CAC
 212                          * XXX no need to stop if ostate RUN but it's ok
 213                          */
 214                         ieee80211_dfs_cac_stop(vap);
 215                         /* fall thru... */
 216                 case IEEE80211_S_INIT:
 217                         if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
 218                             !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan)) {
 219                                 /*
 220                                  * Already have a channel; bypass the
 221                                  * scan and startup immediately.
 222                                  * ieee80211_create_ibss will call back to
 223                                  * move us to RUN state.
 224                                  */
 225                                 ieee80211_create_ibss(vap, vap->iv_des_chan);
 226                                 break;
 227                         }
 228                         /*
 229                          * Initiate a scan.  We can come here as a result
 230                          * of an IEEE80211_IOC_SCAN_REQ too in which case
 231                          * the vap will be marked with IEEE80211_FEXT_SCANREQ
 232                          * and the scan request parameters will be present
 233                          * in iv_scanreq.  Otherwise we do the default.
 234                          */
 235                         if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
 236                                 ieee80211_check_scan(vap,
 237                                     vap->iv_scanreq_flags,
 238                                     vap->iv_scanreq_duration,
 239                                     vap->iv_scanreq_mindwell,
 240                                     vap->iv_scanreq_maxdwell,
 241                                     vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
 242                                 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
 243                         } else
 244                                 ieee80211_check_scan_current(vap);
 245                         break;
 246                 case IEEE80211_S_SCAN:
 247                         /*
 248                          * A state change requires a reset; scan.
 249                          */
 250                         ieee80211_check_scan_current(vap);
 251                         break;
 252                 default:
 253                         break;
 254                 }
 255                 break;
 256         case IEEE80211_S_CAC:
 257                 /*
 258                  * Start CAC on a DFS channel.  We come here when starting
 259                  * a bss on a DFS channel (see ieee80211_create_ibss).
 260                  */
 261                 ieee80211_dfs_cac_start(vap);
 262                 break;
 263         case IEEE80211_S_RUN:
 264                 if (vap->iv_flags & IEEE80211_F_WPA) {
 265                         /* XXX validate prerequisites */
 266                 }
 267                 switch (ostate) {
 268                 case IEEE80211_S_INIT:
 269                         /*
 270                          * Already have a channel; bypass the
 271                          * scan and startup immediately.
 272                          * Note that ieee80211_create_ibss will call
 273                          * back to do a RUN->RUN state change.
 274                          */
 275                         ieee80211_create_ibss(vap,
 276                             ieee80211_ht_adjust_channel(ic,
 277                                 ic->ic_curchan, vap->iv_flags_ht));
 278                         /* NB: iv_bss is changed on return */
 279                         break;
 280                 case IEEE80211_S_CAC:
 281                         /*
 282                          * NB: This is the normal state change when CAC
 283                          * expires and no radar was detected; no need to
 284                          * clear the CAC timer as it's already expired.
 285                          */
 286                         /* fall thru... */
 287                 case IEEE80211_S_CSA:
 288                         /*
 289                          * Shorten inactivity timer of associated stations
 290                          * to weed out sta's that don't follow a CSA.
 291                          */
 292                         ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
 293                         /*
 294                          * Update bss node channel to reflect where
 295                          * we landed after CSA.
 296                          */
 297                         ieee80211_node_set_chan(vap->iv_bss,
 298                             ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
 299                                 ieee80211_htchanflags(vap->iv_bss->ni_chan)));
 300                         /* XXX bypass debug msgs */
 301                         break;
 302                 case IEEE80211_S_SCAN:
 303                 case IEEE80211_S_RUN:
 304 #ifdef IEEE80211_DEBUG
 305                         if (ieee80211_msg_debug(vap)) {
 306                                 struct ieee80211_node *ni = vap->iv_bss;
 307                                 ieee80211_note(vap,
 308                                     "synchronized with %s ssid ",
 309                                     ether_sprintf(ni->ni_bssid));
 310                                 ieee80211_print_essid(ni->ni_essid,
 311                                     ni->ni_esslen);
 312                                 /* XXX MCS/HT */
 313                                 printf(" channel %d start %uMb\n",
 314                                     ieee80211_chan2ieee(ic, ic->ic_curchan),
 315                                     IEEE80211_RATE2MBS(ni->ni_txrate));
 316                         }
 317 #endif
 318                         break;
 319                 default:
 320                         break;
 321                 }
 322                 /*
 323                  * Start/stop the authenticator.  We delay until here
 324                  * to allow configuration to happen out of order.
 325                  */
 326                 if (vap->iv_auth->ia_attach != NULL) {
 327                         /* XXX check failure */
 328                         vap->iv_auth->ia_attach(vap);
 329                 } else if (vap->iv_auth->ia_detach != NULL) {
 330                         vap->iv_auth->ia_detach(vap);
 331                 }
 332                 ieee80211_node_authorize(vap->iv_bss);
 333                 break;
 334         case IEEE80211_S_CSA:
 335                 if (ostate == IEEE80211_S_RUN && isbandchange(ic)) {
 336                         /*
 337                          * On a ``band change'' silently drop associated
 338                          * stations as they must re-associate before they
 339                          * can pass traffic (as otherwise protocol state
 340                          * such as capabilities and the negotiated rate
 341                          * set may/will be wrong).
 342                          */
 343                         ieee80211_iterate_nodes(&ic->ic_sta, sta_drop, vap);
 344                 }
 345                 break;
 346         default:
 347                 break;
 348         }
 349         return 0;
 350 }
 351
 352 static void
 353 hostap_deliver_data(struct ieee80211vap *vap,
 354         struct ieee80211_node *ni, struct mbuf *m)
 355 {
 356         struct ether_header *eh = mtod(m, struct ether_header *);
 357         struct ifnet *ifp = vap->iv_ifp;
 358
 359         /* clear driver/net80211 flags before passing up */
 360         m->m_flags &= ~(M_MCAST | M_BCAST);
 361         m_clrprotoflags(m);
 362
 363         KASSERT(vap->iv_opmode == IEEE80211_M_HOSTAP,
 364             ("gack, opmode %d", vap->iv_opmode));
 365         /*
 366          * Do accounting.
 367          */
 368         if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
 369         IEEE80211_NODE_STAT(ni, rx_data);
 370         IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len);
 371         if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
 372                 m->m_flags |= M_MCAST;          /* XXX M_BCAST? */
 373                 IEEE80211_NODE_STAT(ni, rx_mcast);
 374         } else
 375                 IEEE80211_NODE_STAT(ni, rx_ucast);
 376
 377         /* perform as a bridge within the AP */
 378         if ((vap->iv_flags & IEEE80211_F_NOBRIDGE) == 0) {
 379                 struct mbuf *mcopy = NULL;
 380
 381                 if (m->m_flags & M_MCAST) {
 382                         mcopy = m_dup(m, M_NOWAIT);
 383                         if (mcopy == NULL)
 384                                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
 385                         else
 386                                 mcopy->m_flags |= M_MCAST;
 387                 } else {
 388                         /*
 389                          * Check if the destination is associated with the
 390                          * same vap and authorized to receive traffic.
 391                          * Beware of traffic destined for the vap itself;
 392                          * sending it will not work; just let it be delivered
 393                          * normally.
 394                          */
 395                         struct ieee80211_node *sta = ieee80211_find_vap_node(
 396                              &vap->iv_ic->ic_sta, vap, eh->ether_dhost);
 397                         if (sta != NULL) {
 398                                 if (ieee80211_node_is_authorized(sta)) {
 399                                         /*
 400                                          * Beware of sending to ourself; this
 401                                          * needs to happen via the normal
 402                                          * input path.
 403                                          */
 404                                         if (sta != vap->iv_bss) {
 405                                                 mcopy = m;
 406                                                 m = NULL;
 407                                         }
 408                                 } else {
 409                                         vap->iv_stats.is_rx_unauth++;
 410                                         IEEE80211_NODE_STAT(sta, rx_unauth);
 411                                 }
 412                                 ieee80211_free_node(sta);
 413                         }
 414                 }
 415                 if (mcopy != NULL)
 416                         (void) ieee80211_vap_xmitpkt(vap, mcopy);
 417         }
 418         if (m != NULL) {
 419                 /*
 420                  * Mark frame as coming from vap's interface.
 421                  */
 422                 m->m_pkthdr.rcvif = ifp;
 423                 if (m->m_flags & M_MCAST) {
 424                         /*
 425                          * Spam DWDS vap's w/ multicast traffic.
 426                          */
 427                         /* XXX only if dwds in use? */
 428                         ieee80211_dwds_mcast(vap, m);
 429                 }
 430                 if (ni->ni_vlan != 0) {
 431                         /* attach vlan tag */
 432                         m->m_pkthdr.ether_vtag = ni->ni_vlan;
 433                         m->m_flags |= M_VLANTAG;
 434                 }
 435                 ifp->if_input(ifp, m);
 436         }
 437 }
 438
 439 /*
 440  * Decide if a received management frame should be
 441  * printed when debugging is enabled.  This filters some
 442  * of the less interesting frames that come frequently
 443  * (e.g. beacons).
 444  */
 445 static __inline int
 446 doprint(struct ieee80211vap *vap, int subtype)
 447 {
 448         switch (subtype) {
 449         case IEEE80211_FC0_SUBTYPE_BEACON:
 450                 return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN);
 451         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
 452                 return 0;
 453         }
 454         return 1;
 455 }
 456
 457 /*
 458  * Process a received frame.  The node associated with the sender
 459  * should be supplied.  If nothing was found in the node table then
 460  * the caller is assumed to supply a reference to iv_bss instead.
 461  * The RSSI and a timestamp are also supplied.  The RSSI data is used
 462  * during AP scanning to select a AP to associate with; it can have
 463  * any units so long as values have consistent units and higher values
 464  * mean ``better signal''.  The receive timestamp is currently not used
 465  * by the 802.11 layer.
 466  */
 467 static int
 468 hostap_input(struct ieee80211_node *ni, struct mbuf *m,
 469     const struct ieee80211_rx_stats *rxs, int rssi, int nf)
 470 {
 471         struct ieee80211vap *vap = ni->ni_vap;
 472         struct ieee80211com *ic = ni->ni_ic;
 473         struct ifnet *ifp = vap->iv_ifp;
 474         struct ieee80211_frame *wh;
 475         struct ieee80211_key *key;
 476         struct ether_header *eh;
 477         int hdrspace, need_tap = 1;     /* mbuf need to be tapped. */
 478         uint8_t dir, type, subtype, qos;
 479         uint8_t *bssid;
 480
 481         if (m->m_flags & M_AMPDU_MPDU) {
 482                 /*
 483                  * Fastpath for A-MPDU reorder q resubmission.  Frames
 484                  * w/ M_AMPDU_MPDU marked have already passed through
 485                  * here but were received out of order and been held on
 486                  * the reorder queue.  When resubmitted they are marked
 487                  * with the M_AMPDU_MPDU flag and we can bypass most of
 488                  * the normal processing.
 489                  */
 490                 wh = mtod(m, struct ieee80211_frame *);
 491                 type = IEEE80211_FC0_TYPE_DATA;
 492                 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
 493                 subtype = IEEE80211_FC0_SUBTYPE_QOS;
 494                 hdrspace = ieee80211_hdrspace(ic, wh);  /* XXX optimize? */
 495                 goto resubmit_ampdu;
 496         }
 497
 498         KASSERT(ni != NULL, ("null node"));
 499         ni->ni_inact = ni->ni_inact_reload;
 500
 501         type = -1;                      /* undefined */
 502
 503         if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
 504                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 505                     ni->ni_macaddr, NULL,
 506                     "too short (1): len %u", m->m_pkthdr.len);
 507                 vap->iv_stats.is_rx_tooshort++;
 508                 goto out;
 509         }
 510         /*
 511          * Bit of a cheat here, we use a pointer for a 3-address
 512          * frame format but don't reference fields past outside
 513          * ieee80211_frame_min w/o first validating the data is
 514          * present.
 515          */
 516         wh = mtod(m, struct ieee80211_frame *);
 517
 518         if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
 519             IEEE80211_FC0_VERSION_0) {
 520                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 521                     ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x",
 522                     wh->i_fc[0], wh->i_fc[1]);
 523                 vap->iv_stats.is_rx_badversion++;
 524                 goto err;
 525         }
 526
 527         dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
 528         type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
 529         subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
 530         if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
 531                 if (dir != IEEE80211_FC1_DIR_NODS)
 532                         bssid = wh->i_addr1;
 533                 else if (type == IEEE80211_FC0_TYPE_CTL)
 534                         bssid = wh->i_addr1;
 535                 else {
 536                         if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
 537                                 IEEE80211_DISCARD_MAC(vap,
 538                                     IEEE80211_MSG_ANY, ni->ni_macaddr,
 539                                     NULL, "too short (2): len %u",
 540                                     m->m_pkthdr.len);
 541                                 vap->iv_stats.is_rx_tooshort++;
 542                                 goto out;
 543                         }
 544                         bssid = wh->i_addr3;
 545                 }
 546                 /*
 547                  * Validate the bssid.
 548                  */
 549                 if (!(type == IEEE80211_FC0_TYPE_MGT &&
 550                       subtype == IEEE80211_FC0_SUBTYPE_BEACON) &&
 551                     !IEEE80211_ADDR_EQ(bssid, vap->iv_bss->ni_bssid) &&
 552                     !IEEE80211_ADDR_EQ(bssid, ifp->if_broadcastaddr)) {
 553                         /* not interested in */
 554                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 555                             bssid, NULL, "%s", "not to bss");
 556                         vap->iv_stats.is_rx_wrongbss++;
 557                         goto out;
 558                 }
 559
 560                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
 561                 ni->ni_noise = nf;
 562                 if (IEEE80211_HAS_SEQ(type, subtype)) {
 563                         uint8_t tid = ieee80211_gettid(wh);
 564                         if (IEEE80211_QOS_HAS_SEQ(wh) &&
 565                             TID_TO_WME_AC(tid) >= WME_AC_VI)
 566                                 ic->ic_wme.wme_hipri_traffic++;
 567                         if (! ieee80211_check_rxseq(ni, wh, bssid))
 568                                 goto out;
 569                 }
 570         }
 571
 572         switch (type) {
 573         case IEEE80211_FC0_TYPE_DATA:
 574                 hdrspace = ieee80211_hdrspace(ic, wh);
 575                 if (m->m_len < hdrspace &&
 576                     (m = m_pullup(m, hdrspace)) == NULL) {
 577                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 578                             ni->ni_macaddr, NULL,
 579                             "data too short: expecting %u", hdrspace);
 580                         vap->iv_stats.is_rx_tooshort++;
 581                         goto out;               /* XXX */
 582                 }
 583                 if (!(dir == IEEE80211_FC1_DIR_TODS ||
 584                      (dir == IEEE80211_FC1_DIR_DSTODS &&
 585                       (vap->iv_flags & IEEE80211_F_DWDS)))) {
 586                         if (dir != IEEE80211_FC1_DIR_DSTODS) {
 587                                 IEEE80211_DISCARD(vap,
 588                                     IEEE80211_MSG_INPUT, wh, "data",
 589                                     "incorrect dir 0x%x", dir);
 590                         } else {
 591                                 IEEE80211_DISCARD(vap,
 592                                     IEEE80211_MSG_INPUT |
 593                                     IEEE80211_MSG_WDS, wh,
 594                                     "4-address data",
 595                                     "%s", "DWDS not enabled");
 596                         }
 597                         vap->iv_stats.is_rx_wrongdir++;
 598                         goto out;
 599                 }
 600                 /* check if source STA is associated */
 601                 if (ni == vap->iv_bss) {
 602                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 603                             wh, "data", "%s", "unknown src");
 604                         ieee80211_send_error(ni, wh->i_addr2,
 605                             IEEE80211_FC0_SUBTYPE_DEAUTH,
 606                             IEEE80211_REASON_NOT_AUTHED);
 607                         vap->iv_stats.is_rx_notassoc++;
 608                         goto err;
 609                 }
 610                 if (ni->ni_associd == 0) {
 611                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 612                             wh, "data", "%s", "unassoc src");
 613                         IEEE80211_SEND_MGMT(ni,
 614                             IEEE80211_FC0_SUBTYPE_DISASSOC,
 615                             IEEE80211_REASON_NOT_ASSOCED);
 616                         vap->iv_stats.is_rx_notassoc++;
 617                         goto err;
 618                 }
 619
 620                 /*
 621                  * Check for power save state change.
 622                  * XXX out-of-order A-MPDU frames?
 623                  */
 624                 if (((wh->i_fc[1] & IEEE80211_FC1_PWR_MGT) ^
 625                     (ni->ni_flags & IEEE80211_NODE_PWR_MGT)))
 626                         vap->iv_node_ps(ni,
 627                                 wh->i_fc[1] & IEEE80211_FC1_PWR_MGT);
 628                 /*
 629                  * For 4-address packets handle WDS discovery
 630                  * notifications.  Once a WDS link is setup frames
 631                  * are just delivered to the WDS vap (see below).
 632                  */
 633                 if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap == NULL) {
 634                         if (!ieee80211_node_is_authorized(ni)) {
 635                                 IEEE80211_DISCARD(vap,
 636                                     IEEE80211_MSG_INPUT |
 637                                     IEEE80211_MSG_WDS, wh,
 638                                     "4-address data",
 639                                     "%s", "unauthorized port");
 640                                 vap->iv_stats.is_rx_unauth++;
 641                                 IEEE80211_NODE_STAT(ni, rx_unauth);
 642                                 goto err;
 643                         }
 644                         ieee80211_dwds_discover(ni, m);
 645                         return type;
 646                 }
 647
 648                 /*
 649                  * Handle A-MPDU re-ordering.  If the frame is to be
 650                  * processed directly then ieee80211_ampdu_reorder
 651                  * will return 0; otherwise it has consumed the mbuf
 652                  * and we should do nothing more with it.
 653                  */
 654                 if ((m->m_flags & M_AMPDU) &&
 655                     ieee80211_ampdu_reorder(ni, m) != 0) {
 656                         m = NULL;
 657                         goto out;
 658                 }
 659         resubmit_ampdu:
 660
 661                 /*
 662                  * Handle privacy requirements.  Note that we
 663                  * must not be preempted from here until after
 664                  * we (potentially) call ieee80211_crypto_demic;
 665                  * otherwise we may violate assumptions in the
 666                  * crypto cipher modules used to do delayed update
 667                  * of replay sequence numbers.
 668                  */
 669                 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
 670                         if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
 671                                 /*
 672                                  * Discard encrypted frames when privacy is off.
 673                                  */
 674                                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 675                                     wh, "WEP", "%s", "PRIVACY off");
 676                                 vap->iv_stats.is_rx_noprivacy++;
 677                                 IEEE80211_NODE_STAT(ni, rx_noprivacy);
 678                                 goto out;
 679                         }
 680                         key = ieee80211_crypto_decap(ni, m, hdrspace);
 681                         if (key == NULL) {
 682                                 /* NB: stats+msgs handled in crypto_decap */
 683                                 IEEE80211_NODE_STAT(ni, rx_wepfail);
 684                                 goto out;
 685                         }
 686                         wh = mtod(m, struct ieee80211_frame *);
 687                         wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED;
 688                 } else {
 689                         /* XXX M_WEP and IEEE80211_F_PRIVACY */
 690                         key = NULL;
 691                 }
 692
 693                 /*
 694                  * Save QoS bits for use below--before we strip the header.
 695                  */
 696                 if (subtype == IEEE80211_FC0_SUBTYPE_QOS) {
 697                         qos = (dir == IEEE80211_FC1_DIR_DSTODS) ?
 698                             ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] :
 699                             ((struct ieee80211_qosframe *)wh)->i_qos[0];
 700                 } else
 701                         qos = 0;
 702
 703                 /*
 704                  * Next up, any fragmentation.
 705                  */
 706                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
 707                         m = ieee80211_defrag(ni, m, hdrspace);
 708                         if (m == NULL) {
 709                                 /* Fragment dropped or frame not complete yet */
 710                                 goto out;
 711                         }
 712                 }
 713                 wh = NULL;              /* no longer valid, catch any uses */
 714
 715                 /*
 716                  * Next strip any MSDU crypto bits.
 717                  */
 718                 if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) {
 719                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 720                             ni->ni_macaddr, "data", "%s", "demic error");
 721                         vap->iv_stats.is_rx_demicfail++;
 722                         IEEE80211_NODE_STAT(ni, rx_demicfail);
 723                         goto out;
 724                 }
 725                 /* copy to listener after decrypt */
 726                 if (ieee80211_radiotap_active_vap(vap))
 727                         ieee80211_radiotap_rx(vap, m);
 728                 need_tap = 0;
 729                 /*
 730                  * Finally, strip the 802.11 header.
 731                  */
 732                 m = ieee80211_decap(vap, m, hdrspace);
 733                 if (m == NULL) {
 734                         /* XXX mask bit to check for both */
 735                         /* don't count Null data frames as errors */
 736                         if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
 737                             subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
 738                                 goto out;
 739                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 740                             ni->ni_macaddr, "data", "%s", "decap error");
 741                         vap->iv_stats.is_rx_decap++;
 742                         IEEE80211_NODE_STAT(ni, rx_decap);
 743                         goto err;
 744                 }
 745                 eh = mtod(m, struct ether_header *);
 746                 if (!ieee80211_node_is_authorized(ni)) {
 747                         /*
 748                          * Deny any non-PAE frames received prior to
 749                          * authorization.  For open/shared-key
 750                          * authentication the port is mark authorized
 751                          * after authentication completes.  For 802.1x
 752                          * the port is not marked authorized by the
 753                          * authenticator until the handshake has completed.
 754                          */
 755                         if (eh->ether_type != htons(ETHERTYPE_PAE)) {
 756                                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 757                                     eh->ether_shost, "data",
 758                                     "unauthorized port: ether type 0x%x len %u",
 759                                     eh->ether_type, m->m_pkthdr.len);
 760                                 vap->iv_stats.is_rx_unauth++;
 761                                 IEEE80211_NODE_STAT(ni, rx_unauth);
 762                                 goto err;
 763                         }
 764                 } else {
 765                         /*
 766                          * When denying unencrypted frames, discard
 767                          * any non-PAE frames received without encryption.
 768                          */
 769                         if ((vap->iv_flags & IEEE80211_F_DROPUNENC) &&
 770                             (key == NULL && (m->m_flags & M_WEP) == 0) &&
 771                             eh->ether_type != htons(ETHERTYPE_PAE)) {
 772                                 /*
 773                                  * Drop unencrypted frames.
 774                                  */
 775                                 vap->iv_stats.is_rx_unencrypted++;
 776                                 IEEE80211_NODE_STAT(ni, rx_unencrypted);
 777                                 goto out;
 778                         }
 779                 }
 780                 /* XXX require HT? */
 781                 if (qos & IEEE80211_QOS_AMSDU) {
 782                         m = ieee80211_decap_amsdu(ni, m);
 783                         if (m == NULL)
 784                                 return IEEE80211_FC0_TYPE_DATA;
 785                 } else {
 786 #ifdef IEEE80211_SUPPORT_SUPERG
 787                         m = ieee80211_decap_fastframe(vap, ni, m);
 788                         if (m == NULL)
 789                                 return IEEE80211_FC0_TYPE_DATA;
 790 #endif
 791                 }
 792                 if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap != NULL)
 793                         ieee80211_deliver_data(ni->ni_wdsvap, ni, m);
 794                 else
 795                         hostap_deliver_data(vap, ni, m);
 796                 return IEEE80211_FC0_TYPE_DATA;
 797
 798         case IEEE80211_FC0_TYPE_MGT:
 799                 vap->iv_stats.is_rx_mgmt++;
 800                 IEEE80211_NODE_STAT(ni, rx_mgmt);
 801                 if (dir != IEEE80211_FC1_DIR_NODS) {
 802                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 803                             wh, "mgt", "incorrect dir 0x%x", dir);
 804                         vap->iv_stats.is_rx_wrongdir++;
 805                         goto err;
 806                 }
 807                 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
 808                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 809                             ni->ni_macaddr, "mgt", "too short: len %u",
 810                             m->m_pkthdr.len);
 811                         vap->iv_stats.is_rx_tooshort++;
 812                         goto out;
 813                 }
 814                 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
 815                         /* ensure return frames are unicast */
 816                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
 817                             wh, NULL, "source is multicast: %s",
 818                             ether_sprintf(wh->i_addr2));
 819                         vap->iv_stats.is_rx_mgtdiscard++;       /* XXX stat */
 820                         goto out;
 821                 }
 822 #ifdef IEEE80211_DEBUG
 823                 if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) ||
 824                     ieee80211_msg_dumppkts(vap)) {
 825                         if_printf(ifp, "received %s from %s rssi %d\n",
 826                             ieee80211_mgt_subtype_name(subtype),
 827                             ether_sprintf(wh->i_addr2), rssi);
 828                 }
 829 #endif
 830                 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
 831                         if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) {
 832                                 /*
 833                                  * Only shared key auth frames with a challenge
 834                                  * should be encrypted, discard all others.
 835                                  */
 836                                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 837                                     wh, NULL,
 838                                     "%s", "WEP set but not permitted");
 839                                 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
 840                                 goto out;
 841                         }
 842                         if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
 843                                 /*
 844                                  * Discard encrypted frames when privacy is off.
 845                                  */
 846                                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 847                                     wh, NULL, "%s", "WEP set but PRIVACY off");
 848                                 vap->iv_stats.is_rx_noprivacy++;
 849                                 goto out;
 850                         }
 851                         hdrspace = ieee80211_hdrspace(ic, wh);
 852                         key = ieee80211_crypto_decap(ni, m, hdrspace);
 853                         if (key == NULL) {
 854                                 /* NB: stats+msgs handled in crypto_decap */
 855                                 goto out;
 856                         }
 857                         wh = mtod(m, struct ieee80211_frame *);
 858                         wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED;
 859                 }
 860                 /*
 861                  * Pass the packet to radiotap before calling iv_recv_mgmt().
 862                  * Otherwise iv_recv_mgmt() might pass another packet to
 863                  * radiotap, resulting in out of order packet captures.
 864                  */
 865                 if (ieee80211_radiotap_active_vap(vap))
 866                         ieee80211_radiotap_rx(vap, m);
 867                 need_tap = 0;
 868                 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf);
 869                 goto out;
 870
 871         case IEEE80211_FC0_TYPE_CTL:
 872                 vap->iv_stats.is_rx_ctl++;
 873                 IEEE80211_NODE_STAT(ni, rx_ctrl);
 874                 vap->iv_recv_ctl(ni, m, subtype);
 875                 goto out;
 876         default:
 877                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
 878                     wh, "bad", "frame type 0x%x", type);
 879                 /* should not come here */
 880                 break;
 881         }
 882 err:
 883         if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
 884 out:
 885         if (m != NULL) {
 886                 if (need_tap && ieee80211_radiotap_active_vap(vap))
 887                         ieee80211_radiotap_rx(vap, m);
 888                 m_freem(m);
 889         }
 890         return type;
 891 }
 892
 893 static void
 894 hostap_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh,
 895     int rssi, int nf, uint16_t seq, uint16_t status)
 896 {
 897         struct ieee80211vap *vap = ni->ni_vap;
 898
 899         KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state));
 900
 901         if (ni->ni_authmode == IEEE80211_AUTH_SHARED) {
 902                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
 903                     ni->ni_macaddr, "open auth",
 904                     "bad sta auth mode %u", ni->ni_authmode);
 905                 vap->iv_stats.is_rx_bad_auth++; /* XXX */
 906                 /*
 907                  * Clear any challenge text that may be there if
 908                  * a previous shared key auth failed and then an
 909                  * open auth is attempted.
 910                  */
 911                 if (ni->ni_challenge != NULL) {
 912                         IEEE80211_FREE(ni->ni_challenge, M_80211_NODE);
 913                         ni->ni_challenge = NULL;
 914                 }
 915                 /* XXX hack to workaround calling convention */
 916                 ieee80211_send_error(ni, wh->i_addr2,
 917                     IEEE80211_FC0_SUBTYPE_AUTH,
 918                     (seq + 1) | (IEEE80211_STATUS_ALG<<16));
 919                 return;
 920         }
 921         if (seq != IEEE80211_AUTH_OPEN_REQUEST) {
 922                 vap->iv_stats.is_rx_bad_auth++;
 923                 return;
 924         }
 925         /* always accept open authentication requests */
 926         if (ni == vap->iv_bss) {
 927                 ni = ieee80211_dup_bss(vap, wh->i_addr2);
 928                 if (ni == NULL)
 929                         return;
 930         } else if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0)
 931                 (void) ieee80211_ref_node(ni);
 932         /*
 933          * Mark the node as referenced to reflect that it's
 934          * reference count has been bumped to insure it remains
 935          * after the transaction completes.
 936          */
 937         ni->ni_flags |= IEEE80211_NODE_AREF;
 938         /*
 939          * Mark the node as requiring a valid association id
 940          * before outbound traffic is permitted.
 941          */
 942         ni->ni_flags |= IEEE80211_NODE_ASSOCID;
 943
 944         if (vap->iv_acl != NULL &&
 945             vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) {
 946                 /*
 947                  * When the ACL policy is set to RADIUS we defer the
 948                  * authorization to a user agent.  Dispatch an event,
 949                  * a subsequent MLME call will decide the fate of the
 950                  * station.  If the user agent is not present then the
 951                  * node will be reclaimed due to inactivity.
 952                  */
 953                 IEEE80211_NOTE_MAC(vap,
 954                     IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, ni->ni_macaddr,
 955                     "%s", "station authentication defered (radius acl)");
 956                 ieee80211_notify_node_auth(ni);
 957         } else {
 958                 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1);
 959                 IEEE80211_NOTE_MAC(vap,
 960                     IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni->ni_macaddr,
 961                     "%s", "station authenticated (open)");
 962                 /*
 963                  * When 802.1x is not in use mark the port
 964                  * authorized at this point so traffic can flow.
 965                  */
 966                 if (ni->ni_authmode != IEEE80211_AUTH_8021X)
 967                         ieee80211_node_authorize(ni);
 968         }
 969 }
 970
 971 static void
 972 hostap_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh,
 973     uint8_t *frm, uint8_t *efrm, int rssi, int nf,
 974     uint16_t seq, uint16_t status)
 975 {
 976         struct ieee80211vap *vap = ni->ni_vap;
 977         uint8_t *challenge;
 978         int allocbs, estatus;
 979
 980         KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state));
 981
 982         /*
 983          * NB: this can happen as we allow pre-shared key
 984          * authentication to be enabled w/o wep being turned
 985          * on so that configuration of these can be done
 986          * in any order.  It may be better to enforce the
 987          * ordering in which case this check would just be
 988          * for sanity/consistency.
 989          */
 990         if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
 991                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
 992                     ni->ni_macaddr, "shared key auth",
 993                     "%s", " PRIVACY is disabled");
 994                 estatus = IEEE80211_STATUS_ALG;
 995                 goto bad;
 996         }
 997         /*
 998          * Pre-shared key authentication is evil; accept
 999          * it only if explicitly configured (it is supported
1000          * mainly for compatibility with clients like Mac OS X).
1001          */
1002         if (ni->ni_authmode != IEEE80211_AUTH_AUTO &&
1003             ni->ni_authmode != IEEE80211_AUTH_SHARED) {
1004                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1005                     ni->ni_macaddr, "shared key auth",
1006                     "bad sta auth mode %u", ni->ni_authmode);
1007                 vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */
1008                 estatus = IEEE80211_STATUS_ALG;
1009                 goto bad;
1010         }
1011
1012         challenge = NULL;
1013         if (frm + 1 < efrm) {
1014                 if ((frm[1] + 2) > (efrm - frm)) {
1015                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1016                             ni->ni_macaddr, "shared key auth",
1017                             "ie %d/%d too long",
1018                             frm[0], (frm[1] + 2) - (efrm - frm));
1019                         vap->iv_stats.is_rx_bad_auth++;
1020                         estatus = IEEE80211_STATUS_CHALLENGE;
1021                         goto bad;
1022                 }
1023                 if (*frm == IEEE80211_ELEMID_CHALLENGE)
1024                         challenge = frm;
1025                 frm += frm[1] + 2;
1026         }
1027         switch (seq) {
1028         case IEEE80211_AUTH_SHARED_CHALLENGE:
1029         case IEEE80211_AUTH_SHARED_RESPONSE:
1030                 if (challenge == NULL) {
1031                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1032                             ni->ni_macaddr, "shared key auth",
1033                             "%s", "no challenge");
1034                         vap->iv_stats.is_rx_bad_auth++;
1035                         estatus = IEEE80211_STATUS_CHALLENGE;
1036                         goto bad;
1037                 }
1038                 if (challenge[1] != IEEE80211_CHALLENGE_LEN) {
1039                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1040                             ni->ni_macaddr, "shared key auth",
1041                             "bad challenge len %d", challenge[1]);
1042                         vap->iv_stats.is_rx_bad_auth++;
1043                         estatus = IEEE80211_STATUS_CHALLENGE;
1044                         goto bad;
1045                 }
1046         default:
1047                 break;
1048         }
1049         switch (seq) {
1050         case IEEE80211_AUTH_SHARED_REQUEST:
1051                 if (ni == vap->iv_bss) {
1052                         ni = ieee80211_dup_bss(vap, wh->i_addr2);
1053                         if (ni == NULL) {
1054                                 /* NB: no way to return an error */
1055                                 return;
1056                         }
1057                         allocbs = 1;
1058                 } else {
1059                         if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0)
1060                                 (void) ieee80211_ref_node(ni);
1061                         allocbs = 0;
1062                 }
1063                 /*
1064                  * Mark the node as referenced to reflect that it's
1065                  * reference count has been bumped to insure it remains
1066                  * after the transaction completes.
1067                  */
1068                 ni->ni_flags |= IEEE80211_NODE_AREF;
1069                 /*
1070                  * Mark the node as requiring a valid association id
1071                  * before outbound traffic is permitted.
1072                  */
1073                 ni->ni_flags |= IEEE80211_NODE_ASSOCID;
1074                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1075                 ni->ni_noise = nf;
1076                 if (!ieee80211_alloc_challenge(ni)) {
1077                         /* NB: don't return error so they rexmit */
1078                         return;
1079                 }
1080                 get_random_bytes(ni->ni_challenge,
1081                         IEEE80211_CHALLENGE_LEN);
1082                 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH,
1083                     ni, "shared key %sauth request", allocbs ? "" : "re");
1084                 /*
1085                  * When the ACL policy is set to RADIUS we defer the
1086                  * authorization to a user agent.  Dispatch an event,
1087                  * a subsequent MLME call will decide the fate of the
1088                  * station.  If the user agent is not present then the
1089                  * node will be reclaimed due to inactivity.
1090                  */
1091                 if (vap->iv_acl != NULL &&
1092                     vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) {
1093                         IEEE80211_NOTE_MAC(vap,
1094                             IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL,
1095                             ni->ni_macaddr,
1096                             "%s", "station authentication defered (radius acl)");
1097                         ieee80211_notify_node_auth(ni);
1098                         return;
1099                 }
1100                 break;
1101         case IEEE80211_AUTH_SHARED_RESPONSE:
1102                 if (ni == vap->iv_bss) {
1103                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1104                             ni->ni_macaddr, "shared key response",
1105                             "%s", "unknown station");
1106                         /* NB: don't send a response */
1107                         return;
1108                 }
1109                 if (ni->ni_challenge == NULL) {
1110                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1111                             ni->ni_macaddr, "shared key response",
1112                             "%s", "no challenge recorded");
1113                         vap->iv_stats.is_rx_bad_auth++;
1114                         estatus = IEEE80211_STATUS_CHALLENGE;
1115                         goto bad;
1116                 }
1117                 if (memcmp(ni->ni_challenge, &challenge[2],
1118                            challenge[1]) != 0) {
1119                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1120                             ni->ni_macaddr, "shared key response",
1121                             "%s", "challenge mismatch");
1122                         vap->iv_stats.is_rx_auth_fail++;
1123                         estatus = IEEE80211_STATUS_CHALLENGE;
1124                         goto bad;
1125                 }
1126                 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH,
1127                     ni, "%s", "station authenticated (shared key)");
1128                 ieee80211_node_authorize(ni);
1129                 break;
1130         default:
1131                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1132                     ni->ni_macaddr, "shared key auth",
1133                     "bad seq %d", seq);
1134                 vap->iv_stats.is_rx_bad_auth++;
1135                 estatus = IEEE80211_STATUS_SEQUENCE;
1136                 goto bad;
1137         }
1138         IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1);
1139         return;
1140 bad:
1141         /*
1142          * Send an error response; but only when operating as an AP.
1143          */
1144         /* XXX hack to workaround calling convention */
1145         ieee80211_send_error(ni, wh->i_addr2,
1146             IEEE80211_FC0_SUBTYPE_AUTH,
1147             (seq + 1) | (estatus<<16));
1148 }
1149
1150 /*
1151  * Convert a WPA cipher selector OUI to an internal
1152  * cipher algorithm.  Where appropriate we also
1153  * record any key length.
1154  */
1155 static int
1156 wpa_cipher(const uint8_t *sel, uint8_t *keylen)
1157 {
1158 #define WPA_SEL(x)      (((x)<<24)|WPA_OUI)
1159         uint32_t w = le32dec(sel);
1160
1161         switch (w) {
1162         case WPA_SEL(WPA_CSE_NULL):
1163                 return IEEE80211_CIPHER_NONE;
1164         case WPA_SEL(WPA_CSE_WEP40):
1165                 if (keylen)
1166                         *keylen = 40 / NBBY;
1167                 return IEEE80211_CIPHER_WEP;
1168         case WPA_SEL(WPA_CSE_WEP104):
1169                 if (keylen)
1170                         *keylen = 104 / NBBY;
1171                 return IEEE80211_CIPHER_WEP;
1172         case WPA_SEL(WPA_CSE_TKIP):
1173                 return IEEE80211_CIPHER_TKIP;
1174         case WPA_SEL(WPA_CSE_CCMP):
1175                 return IEEE80211_CIPHER_AES_CCM;
1176         }
1177         return 32;              /* NB: so 1<< is discarded */
1178 #undef WPA_SEL
1179 }
1180
1181 /*
1182  * Convert a WPA key management/authentication algorithm
1183  * to an internal code.
1184  */
1185 static int
1186 wpa_keymgmt(const uint8_t *sel)
1187 {
1188 #define WPA_SEL(x)      (((x)<<24)|WPA_OUI)
1189         uint32_t w = le32dec(sel);
1190
1191         switch (w) {
1192         case WPA_SEL(WPA_ASE_8021X_UNSPEC):
1193                 return WPA_ASE_8021X_UNSPEC;
1194         case WPA_SEL(WPA_ASE_8021X_PSK):
1195                 return WPA_ASE_8021X_PSK;
1196         case WPA_SEL(WPA_ASE_NONE):
1197                 return WPA_ASE_NONE;
1198         }
1199         return 0;               /* NB: so is discarded */
1200 #undef WPA_SEL
1201 }
1202
1203 /*
1204  * Parse a WPA information element to collect parameters.
1205  * Note that we do not validate security parameters; that
1206  * is handled by the authenticator; the parsing done here
1207  * is just for internal use in making operational decisions.
1208  */
1209 static int
1210 ieee80211_parse_wpa(struct ieee80211vap *vap, const uint8_t *frm,
1211         struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh)
1212 {
1213         uint8_t len = frm[1];
1214         uint32_t w;
1215         int n;
1216
1217         /*
1218          * Check the length once for fixed parts: OUI, type,
1219          * version, mcast cipher, and 2 selector counts.
1220          * Other, variable-length data, must be checked separately.
1221          */
1222         if ((vap->iv_flags & IEEE80211_F_WPA1) == 0) {
1223                 IEEE80211_DISCARD_IE(vap,
1224                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1225                     wh, "WPA", "not WPA, flags 0x%x", vap->iv_flags);
1226                 return IEEE80211_REASON_IE_INVALID;
1227         }
1228         if (len < 14) {
1229                 IEEE80211_DISCARD_IE(vap,
1230                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1231                     wh, "WPA", "too short, len %u", len);
1232                 return IEEE80211_REASON_IE_INVALID;
1233         }
1234         frm += 6, len -= 4;             /* NB: len is payload only */
1235         /* NB: iswpaoui already validated the OUI and type */
1236         w = le16dec(frm);
1237         if (w != WPA_VERSION) {
1238                 IEEE80211_DISCARD_IE(vap,
1239                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1240                     wh, "WPA", "bad version %u", w);
1241                 return IEEE80211_REASON_IE_INVALID;
1242         }
1243         frm += 2, len -= 2;
1244
1245         memset(rsn, 0, sizeof(*rsn));
1246
1247         /* multicast/group cipher */
1248         rsn->rsn_mcastcipher = wpa_cipher(frm, &rsn->rsn_mcastkeylen);
1249         frm += 4, len -= 4;
1250
1251         /* unicast ciphers */
1252         n = le16dec(frm);
1253         frm += 2, len -= 2;
1254         if (len < n*4+2) {
1255                 IEEE80211_DISCARD_IE(vap,
1256                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1257                     wh, "WPA", "ucast cipher data too short; len %u, n %u",
1258                     len, n);
1259                 return IEEE80211_REASON_IE_INVALID;
1260         }
1261         w = 0;
1262         for (; n > 0; n--) {
1263                 w |= 1<<wpa_cipher(frm, &rsn->rsn_ucastkeylen);
1264                 frm += 4, len -= 4;
1265         }
1266         if (w & (1<<IEEE80211_CIPHER_TKIP))
1267                 rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP;
1268         else
1269                 rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM;
1270
1271         /* key management algorithms */
1272         n = le16dec(frm);
1273         frm += 2, len -= 2;
1274         if (len < n*4) {
1275                 IEEE80211_DISCARD_IE(vap,
1276                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1277                     wh, "WPA", "key mgmt alg data too short; len %u, n %u",
1278                     len, n);
1279                 return IEEE80211_REASON_IE_INVALID;
1280         }
1281         w = 0;
1282         for (; n > 0; n--) {
1283                 w |= wpa_keymgmt(frm);
1284                 frm += 4, len -= 4;
1285         }
1286         if (w & WPA_ASE_8021X_UNSPEC)
1287                 rsn->rsn_keymgmt = WPA_ASE_8021X_UNSPEC;
1288         else
1289                 rsn->rsn_keymgmt = WPA_ASE_8021X_PSK;
1290
1291         if (len > 2)            /* optional capabilities */
1292                 rsn->rsn_caps = le16dec(frm);
1293
1294         return 0;
1295 }
1296
1297 /*
1298  * Convert an RSN cipher selector OUI to an internal
1299  * cipher algorithm.  Where appropriate we also
1300  * record any key length.
1301  */
1302 static int
1303 rsn_cipher(const uint8_t *sel, uint8_t *keylen)
1304 {
1305 #define RSN_SEL(x)      (((x)<<24)|RSN_OUI)
1306         uint32_t w = le32dec(sel);
1307
1308         switch (w) {
1309         case RSN_SEL(RSN_CSE_NULL):
1310                 return IEEE80211_CIPHER_NONE;
1311         case RSN_SEL(RSN_CSE_WEP40):
1312                 if (keylen)
1313                         *keylen = 40 / NBBY;
1314                 return IEEE80211_CIPHER_WEP;
1315         case RSN_SEL(RSN_CSE_WEP104):
1316                 if (keylen)
1317                         *keylen = 104 / NBBY;
1318                 return IEEE80211_CIPHER_WEP;
1319         case RSN_SEL(RSN_CSE_TKIP):
1320                 return IEEE80211_CIPHER_TKIP;
1321         case RSN_SEL(RSN_CSE_CCMP):
1322                 return IEEE80211_CIPHER_AES_CCM;
1323         case RSN_SEL(RSN_CSE_WRAP):
1324                 return IEEE80211_CIPHER_AES_OCB;
1325         }
1326         return 32;              /* NB: so 1<< is discarded */
1327 #undef WPA_SEL
1328 }
1329
1330 /*
1331  * Convert an RSN key management/authentication algorithm
1332  * to an internal code.
1333  */
1334 static int
1335 rsn_keymgmt(const uint8_t *sel)
1336 {
1337 #define RSN_SEL(x)      (((x)<<24)|RSN_OUI)
1338         uint32_t w = le32dec(sel);
1339
1340         switch (w) {
1341         case RSN_SEL(RSN_ASE_8021X_UNSPEC):
1342                 return RSN_ASE_8021X_UNSPEC;
1343         case RSN_SEL(RSN_ASE_8021X_PSK):
1344                 return RSN_ASE_8021X_PSK;
1345         case RSN_SEL(RSN_ASE_NONE):
1346                 return RSN_ASE_NONE;
1347         }
1348         return 0;               /* NB: so is discarded */
1349 #undef RSN_SEL
1350 }
1351
1352 /*
1353  * Parse a WPA/RSN information element to collect parameters
1354  * and validate the parameters against what has been
1355  * configured for the system.
1356  */
1357 static int
1358 ieee80211_parse_rsn(struct ieee80211vap *vap, const uint8_t *frm,
1359         struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh)
1360 {
1361         uint8_t len = frm[1];
1362         uint32_t w;
1363         int n;
1364
1365         /*
1366          * Check the length once for fixed parts:
1367          * version, mcast cipher, and 2 selector counts.
1368          * Other, variable-length data, must be checked separately.
1369          */
1370         if ((vap->iv_flags & IEEE80211_F_WPA2) == 0) {
1371                 IEEE80211_DISCARD_IE(vap,
1372                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1373                     wh, "WPA", "not RSN, flags 0x%x", vap->iv_flags);
1374                 return IEEE80211_REASON_IE_INVALID;
1375         }
1376         if (len < 10) {
1377                 IEEE80211_DISCARD_IE(vap,
1378                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1379                     wh, "RSN", "too short, len %u", len);
1380                 return IEEE80211_REASON_IE_INVALID;
1381         }
1382         frm += 2;
1383         w = le16dec(frm);
1384         if (w != RSN_VERSION) {
1385                 IEEE80211_DISCARD_IE(vap,
1386                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1387                     wh, "RSN", "bad version %u", w);
1388                 return IEEE80211_REASON_IE_INVALID;
1389         }
1390         frm += 2, len -= 2;
1391
1392         memset(rsn, 0, sizeof(*rsn));
1393
1394         /* multicast/group cipher */
1395         rsn->rsn_mcastcipher = rsn_cipher(frm, &rsn->rsn_mcastkeylen);
1396         frm += 4, len -= 4;
1397
1398         /* unicast ciphers */
1399         n = le16dec(frm);
1400         frm += 2, len -= 2;
1401         if (len < n*4+2) {
1402                 IEEE80211_DISCARD_IE(vap,
1403                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1404                     wh, "RSN", "ucast cipher data too short; len %u, n %u",
1405                     len, n);
1406                 return IEEE80211_REASON_IE_INVALID;
1407         }
1408         w = 0;
1409         for (; n > 0; n--) {
1410                 w |= 1<<rsn_cipher(frm, &rsn->rsn_ucastkeylen);
1411                 frm += 4, len -= 4;
1412         }
1413         if (w & (1<<IEEE80211_CIPHER_TKIP))
1414                 rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP;
1415         else
1416                 rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM;
1417
1418         /* key management algorithms */
1419         n = le16dec(frm);
1420         frm += 2, len -= 2;
1421         if (len < n*4) {
1422                 IEEE80211_DISCARD_IE(vap,
1423                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1424                     wh, "RSN", "key mgmt alg data too short; len %u, n %u",
1425                     len, n);
1426                 return IEEE80211_REASON_IE_INVALID;
1427         }
1428         w = 0;
1429         for (; n > 0; n--) {
1430                 w |= rsn_keymgmt(frm);
1431                 frm += 4, len -= 4;
1432         }
1433         if (w & RSN_ASE_8021X_UNSPEC)
1434                 rsn->rsn_keymgmt = RSN_ASE_8021X_UNSPEC;
1435         else
1436                 rsn->rsn_keymgmt = RSN_ASE_8021X_PSK;
1437
1438         /* optional RSN capabilities */
1439         if (len > 2)
1440                 rsn->rsn_caps = le16dec(frm);
1441         /* XXXPMKID */
1442
1443         return 0;
1444 }
1445
1446 /*
1447  * WPA/802.11i association request processing.
1448  */
1449 static int
1450 wpa_assocreq(struct ieee80211_node *ni, struct ieee80211_rsnparms *rsnparms,
1451         const struct ieee80211_frame *wh, const uint8_t *wpa,
1452         const uint8_t *rsn, uint16_t capinfo)
1453 {
1454         struct ieee80211vap *vap = ni->ni_vap;
1455         uint8_t reason;
1456         int badwparsn;
1457
1458         ni->ni_flags &= ~(IEEE80211_NODE_WPS|IEEE80211_NODE_TSN);
1459         if (wpa == NULL && rsn == NULL) {
1460                 if (vap->iv_flags_ext & IEEE80211_FEXT_WPS) {
1461                         /*
1462                          * W-Fi Protected Setup (WPS) permits
1463                          * clients to associate and pass EAPOL frames
1464                          * to establish initial credentials.
1465                          */
1466                         ni->ni_flags |= IEEE80211_NODE_WPS;
1467                         return 1;
1468                 }
1469                 if ((vap->iv_flags_ext & IEEE80211_FEXT_TSN) &&
1470                     (capinfo & IEEE80211_CAPINFO_PRIVACY)) {
1471                         /*
1472                          * Transitional Security Network.  Permits clients
1473                          * to associate and use WEP while WPA is configured.
1474                          */
1475                         ni->ni_flags |= IEEE80211_NODE_TSN;
1476                         return 1;
1477                 }
1478                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA,
1479                     wh, NULL, "%s", "no WPA/RSN IE in association request");
1480                 vap->iv_stats.is_rx_assoc_badwpaie++;
1481                 reason = IEEE80211_REASON_IE_INVALID;
1482                 goto bad;
1483         }
1484         /* assert right association security credentials */
1485         badwparsn = 0;                  /* NB: to silence compiler */
1486         switch (vap->iv_flags & IEEE80211_F_WPA) {
1487         case IEEE80211_F_WPA1:
1488                 badwparsn = (wpa == NULL);
1489                 break;
1490         case IEEE80211_F_WPA2:
1491                 badwparsn = (rsn == NULL);
1492                 break;
1493         case IEEE80211_F_WPA1|IEEE80211_F_WPA2:
1494                 badwparsn = (wpa == NULL && rsn == NULL);
1495                 break;
1496         }
1497         if (badwparsn) {
1498                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA,
1499                     wh, NULL,
1500                     "%s", "missing WPA/RSN IE in association request");
1501                 vap->iv_stats.is_rx_assoc_badwpaie++;
1502                 reason = IEEE80211_REASON_IE_INVALID;
1503                 goto bad;
1504         }
1505         /*
1506          * Parse WPA/RSN information element.
1507          */
1508         if (wpa != NULL)
1509                 reason = ieee80211_parse_wpa(vap, wpa, rsnparms, wh);
1510         else
1511                 reason = ieee80211_parse_rsn(vap, rsn, rsnparms, wh);
1512         if (reason != 0) {
1513                 /* XXX distinguish WPA/RSN? */
1514                 vap->iv_stats.is_rx_assoc_badwpaie++;
1515                 goto bad;
1516         }
1517         IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, ni,
1518             "%s ie: mc %u/%u uc %u/%u key %u caps 0x%x",
1519             wpa != NULL ? "WPA" : "RSN",
1520             rsnparms->rsn_mcastcipher, rsnparms->rsn_mcastkeylen,
1521             rsnparms->rsn_ucastcipher, rsnparms->rsn_ucastkeylen,
1522             rsnparms->rsn_keymgmt, rsnparms->rsn_caps);
1523
1524         return 1;
1525 bad:
1526         ieee80211_node_deauth(ni, reason);
1527         return 0;
1528 }
1529
1530 /* XXX find a better place for definition */
1531 struct l2_update_frame {
1532         struct ether_header eh;
1533         uint8_t dsap;
1534         uint8_t ssap;
1535         uint8_t control;
1536         uint8_t xid[3];
1537 }  __packed;
1538
1539 /*
1540  * Deliver a TGf L2UF frame on behalf of a station.
1541  * This primes any bridge when the station is roaming
1542  * between ap's on the same wired network.
1543  */
1544 static void
1545 ieee80211_deliver_l2uf(struct ieee80211_node *ni)
1546 {
1547         struct ieee80211vap *vap = ni->ni_vap;
1548         struct ifnet *ifp = vap->iv_ifp;
1549         struct mbuf *m;
1550         struct l2_update_frame *l2uf;
1551         struct ether_header *eh;
1552
1553         m = m_gethdr(M_NOWAIT, MT_DATA);
1554         if (m == NULL) {
1555                 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
1556                     "%s", "no mbuf for l2uf frame");
1557                 vap->iv_stats.is_rx_nobuf++;    /* XXX not right */
1558                 return;
1559         }
1560         l2uf = mtod(m, struct l2_update_frame *);
1561         eh = &l2uf->eh;
1562         /* dst: Broadcast address */
1563         IEEE80211_ADDR_COPY(eh->ether_dhost, ifp->if_broadcastaddr);
1564         /* src: associated STA */
1565         IEEE80211_ADDR_COPY(eh->ether_shost, ni->ni_macaddr);
1566         eh->ether_type = htons(sizeof(*l2uf) - sizeof(*eh));
1567
1568         l2uf->dsap = 0;
1569         l2uf->ssap = 0;
1570         l2uf->control = 0xf5;
1571         l2uf->xid[0] = 0x81;
1572         l2uf->xid[1] = 0x80;
1573         l2uf->xid[2] = 0x00;
1574
1575         m->m_pkthdr.len = m->m_len = sizeof(*l2uf);
1576         hostap_deliver_data(vap, ni, m);
1577 }
1578
1579 static void
1580 ratesetmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1581         int reassoc, int resp, const char *tag, int rate)
1582 {
1583         IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2,
1584             "deny %s request, %s rate set mismatch, rate/MCS %d",
1585             reassoc ? "reassoc" : "assoc", tag, rate & IEEE80211_RATE_VAL);
1586         IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_BASIC_RATE);
1587         ieee80211_node_leave(ni);
1588 }
1589
1590 static void
1591 capinfomismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1592         int reassoc, int resp, const char *tag, int capinfo)
1593 {
1594         struct ieee80211vap *vap = ni->ni_vap;
1595
1596         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2,
1597             "deny %s request, %s mismatch 0x%x",
1598             reassoc ? "reassoc" : "assoc", tag, capinfo);
1599         IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_CAPINFO);
1600         ieee80211_node_leave(ni);
1601         vap->iv_stats.is_rx_assoc_capmismatch++;
1602 }
1603
1604 static void
1605 htcapmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1606         int reassoc, int resp)
1607 {
1608         IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2,
1609             "deny %s request, %s missing HT ie", reassoc ? "reassoc" : "assoc");
1610         /* XXX no better code */
1611         IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_MISSING_HT_CAPS);
1612         ieee80211_node_leave(ni);
1613 }
1614
1615 static void
1616 authalgreject(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1617         int algo, int seq, int status)
1618 {
1619         struct ieee80211vap *vap = ni->ni_vap;
1620
1621         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1622             wh, NULL, "unsupported alg %d", algo);
1623         vap->iv_stats.is_rx_auth_unsupported++;
1624         ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_AUTH,
1625             seq | (status << 16));
1626 }
1627
1628 static __inline int
1629 ishtmixed(const uint8_t *ie)
1630 {
1631         const struct ieee80211_ie_htinfo *ht =
1632             (const struct ieee80211_ie_htinfo *) ie;
1633         return (ht->hi_byte2 & IEEE80211_HTINFO_OPMODE) ==
1634             IEEE80211_HTINFO_OPMODE_MIXED;
1635 }
1636
1637 static int
1638 is11bclient(const uint8_t *rates, const uint8_t *xrates)
1639 {
1640         static const uint32_t brates = (1<<2*1)|(1<<2*2)|(1<<11)|(1<<2*11);
1641         int i;
1642
1643         /* NB: the 11b clients we care about will not have xrates */
1644         if (xrates != NULL || rates == NULL)
1645                 return 0;
1646         for (i = 0; i < rates[1]; i++) {
1647                 int r = rates[2+i] & IEEE80211_RATE_VAL;
1648                 if (r > 2*11 || ((1<<r) & brates) == 0)
1649                         return 0;
1650         }
1651         return 1;
1652 }
1653
1654 static void
1655 hostap_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0,
1656         int subtype, const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1657 {
1658         struct ieee80211vap *vap = ni->ni_vap;
1659         struct ieee80211com *ic = ni->ni_ic;
1660         struct ieee80211_frame *wh;
1661         uint8_t *frm, *efrm, *sfrm;
1662         uint8_t *ssid, *rates, *xrates, *wpa, *rsn, *wme, *ath, *htcap;
1663         int reassoc, resp;
1664         uint8_t rate;
1665
1666         wh = mtod(m0, struct ieee80211_frame *);
1667         frm = (uint8_t *)&wh[1];
1668         efrm = mtod(m0, uint8_t *) + m0->m_len;
1669         switch (subtype) {
1670         case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1671                 /*
1672                  * We process beacon/probe response frames when scanning;
1673                  * otherwise we check beacon frames for overlapping non-ERP
1674                  * BSS in 11g and/or overlapping legacy BSS when in HT.
1675                  */
1676                 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1677                         vap->iv_stats.is_rx_mgtdiscard++;
1678                         return;
1679                 }
1680                 /* FALLTHROUGH */
1681         case IEEE80211_FC0_SUBTYPE_BEACON: {
1682                 struct ieee80211_scanparams scan;
1683
1684                 /* NB: accept off-channel frames */
1685                 /* XXX TODO: use rxstatus to determine off-channel details */
1686                 if (ieee80211_parse_beacon(ni, m0, ic->ic_curchan, &scan) &~ IEEE80211_BPARSE_OFFCHAN)
1687                         return;
1688                 /*
1689                  * Count frame now that we know it's to be processed.
1690                  */
1691                 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1692                         vap->iv_stats.is_rx_beacon++;           /* XXX remove */
1693                         IEEE80211_NODE_STAT(ni, rx_beacons);
1694                 } else
1695                         IEEE80211_NODE_STAT(ni, rx_proberesp);
1696                 /*
1697                  * If scanning, just pass information to the scan module.
1698                  */
1699                 if (ic->ic_flags & IEEE80211_F_SCAN) {
1700                         if (scan.status == 0 &&         /* NB: on channel */
1701                             (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN)) {
1702                                 /*
1703                                  * Actively scanning a channel marked passive;
1704                                  * send a probe request now that we know there
1705                                  * is 802.11 traffic present.
1706                                  *
1707                                  * XXX check if the beacon we recv'd gives
1708                                  * us what we need and suppress the probe req
1709                                  */
1710                                 ieee80211_probe_curchan(vap, 1);
1711                                 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1712                         }
1713                         ieee80211_add_scan(vap, ic->ic_curchan, &scan, wh,
1714                             subtype, rssi, nf);
1715                         return;
1716                 }
1717                 /*
1718                  * Check beacon for overlapping bss w/ non ERP stations.
1719                  * If we detect one and protection is configured but not
1720                  * enabled, enable it and start a timer that'll bring us
1721                  * out if we stop seeing the bss.
1722                  */
1723                 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
1724                     scan.status == 0 &&                 /* NB: on-channel */
1725                     ((scan.erp & 0x100) == 0 ||         /* NB: no ERP, 11b sta*/
1726                      (scan.erp & IEEE80211_ERP_NON_ERP_PRESENT))) {
1727                         ic->ic_lastnonerp = ticks;
1728                         ic->ic_flags_ext |= IEEE80211_FEXT_NONERP_PR;
1729                         if (ic->ic_protmode != IEEE80211_PROT_NONE &&
1730                             (ic->ic_flags & IEEE80211_F_USEPROT) == 0) {
1731                                 IEEE80211_NOTE_FRAME(vap,
1732                                     IEEE80211_MSG_ASSOC, wh,
1733                                     "non-ERP present on channel %d "
1734                                     "(saw erp 0x%x from channel %d), "
1735                                     "enable use of protection",
1736                                     ic->ic_curchan->ic_ieee,
1737                                     scan.erp, scan.chan);
1738                                 ic->ic_flags |= IEEE80211_F_USEPROT;
1739                                 ieee80211_notify_erp(ic);
1740                         }
1741                 }
1742                 /*
1743                  * Check beacon for non-HT station on HT channel
1744                  * and update HT BSS occupancy as appropriate.
1745                  */
1746                 if (IEEE80211_IS_CHAN_HT(ic->ic_curchan)) {
1747                         if (scan.status & IEEE80211_BPARSE_OFFCHAN) {
1748                                 /*
1749                                  * Off control channel; only check frames
1750                                  * that come in the extension channel when
1751                                  * operating w/ HT40.
1752                                  */
1753                                 if (!IEEE80211_IS_CHAN_HT40(ic->ic_curchan))
1754                                         break;
1755                                 if (scan.chan != ic->ic_curchan->ic_extieee)
1756                                         break;
1757                         }
1758                         if (scan.htinfo == NULL) {
1759                                 ieee80211_htprot_update(ic,
1760                                     IEEE80211_HTINFO_OPMODE_PROTOPT |
1761                                     IEEE80211_HTINFO_NONHT_PRESENT);
1762                         } else if (ishtmixed(scan.htinfo)) {
1763                                 /* XXX? take NONHT_PRESENT from beacon? */
1764                                 ieee80211_htprot_update(ic,
1765                                     IEEE80211_HTINFO_OPMODE_MIXED |
1766                                     IEEE80211_HTINFO_NONHT_PRESENT);
1767                         }
1768                 }
1769                 break;
1770         }
1771
1772         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1773                 if (vap->iv_state != IEEE80211_S_RUN) {
1774                         vap->iv_stats.is_rx_mgtdiscard++;
1775                         return;
1776                 }
1777                 /*
1778                  * Consult the ACL policy module if setup.
1779                  */
1780                 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1781                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1782                             wh, NULL, "%s", "disallowed by ACL");
1783                         vap->iv_stats.is_rx_acl++;
1784                         return;
1785                 }
1786                 /*
1787                  * prreq frame format
1788                  *      [tlv] ssid
1789                  *      [tlv] supported rates
1790                  *      [tlv] extended supported rates
1791                  */
1792                 ssid = rates = xrates = NULL;
1793                 while (efrm - frm > 1) {
1794                         IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1795                         switch (*frm) {
1796                         case IEEE80211_ELEMID_SSID:
1797                                 ssid = frm;
1798                                 break;
1799                         case IEEE80211_ELEMID_RATES:
1800                                 rates = frm;
1801                                 break;
1802                         case IEEE80211_ELEMID_XRATES:
1803                                 xrates = frm;
1804                                 break;
1805                         }
1806                         frm += frm[1] + 2;
1807                 }
1808                 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
1809                 if (xrates != NULL)
1810                         IEEE80211_VERIFY_ELEMENT(xrates,
1811                                 IEEE80211_RATE_MAXSIZE - rates[1], return);
1812                 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
1813                 IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return);
1814                 if ((vap->iv_flags & IEEE80211_F_HIDESSID) && ssid[1] == 0) {
1815                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1816                             wh, NULL,
1817                             "%s", "no ssid with ssid suppression enabled");
1818                         vap->iv_stats.is_rx_ssidmismatch++; /*XXX*/
1819                         return;
1820                 }
1821
1822                 /* XXX find a better class or define it's own */
1823                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
1824                     "%s", "recv probe req");
1825                 /*
1826                  * Some legacy 11b clients cannot hack a complete
1827                  * probe response frame.  When the request includes
1828                  * only a bare-bones rate set, communicate this to
1829                  * the transmit side.
1830                  */
1831                 ieee80211_send_proberesp(vap, wh->i_addr2,
1832                     is11bclient(rates, xrates) ? IEEE80211_SEND_LEGACY_11B : 0);
1833                 break;
1834
1835         case IEEE80211_FC0_SUBTYPE_AUTH: {
1836                 uint16_t algo, seq, status;
1837
1838                 if (vap->iv_state != IEEE80211_S_RUN) {
1839                         vap->iv_stats.is_rx_mgtdiscard++;
1840                         return;
1841                 }
1842                 if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) {
1843                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1844                             wh, NULL, "%s", "wrong bssid");
1845                         vap->iv_stats.is_rx_wrongbss++; /*XXX unique stat?*/
1846                         return;
1847                 }
1848                 /*
1849                  * auth frame format
1850                  *      [2] algorithm
1851                  *      [2] sequence
1852                  *      [2] status
1853                  *      [tlv*] challenge
1854                  */
1855                 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return);
1856                 algo   = le16toh(*(uint16_t *)frm);
1857                 seq    = le16toh(*(uint16_t *)(frm + 2));
1858                 status = le16toh(*(uint16_t *)(frm + 4));
1859                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2,
1860                     "recv auth frame with algorithm %d seq %d", algo, seq);
1861                 /*
1862                  * Consult the ACL policy module if setup.
1863                  */
1864                 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1865                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1866                             wh, NULL, "%s", "disallowed by ACL");
1867                         vap->iv_stats.is_rx_acl++;
1868                         ieee80211_send_error(ni, wh->i_addr2,
1869                             IEEE80211_FC0_SUBTYPE_AUTH,
1870                             (seq+1) | (IEEE80211_STATUS_UNSPECIFIED<<16));
1871                         return;
1872                 }
1873                 if (vap->iv_flags & IEEE80211_F_COUNTERM) {
1874                         IEEE80211_DISCARD(vap,
1875                             IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO,
1876                             wh, NULL, "%s", "TKIP countermeasures enabled");
1877                         vap->iv_stats.is_rx_auth_countermeasures++;
1878                         ieee80211_send_error(ni, wh->i_addr2,
1879                                 IEEE80211_FC0_SUBTYPE_AUTH,
1880                                 IEEE80211_REASON_MIC_FAILURE);
1881                         return;
1882                 }
1883                 if (algo == IEEE80211_AUTH_ALG_SHARED)
1884                         hostap_auth_shared(ni, wh, frm + 6, efrm, rssi, nf,
1885                             seq, status);
1886                 else if (algo == IEEE80211_AUTH_ALG_OPEN)
1887                         hostap_auth_open(ni, wh, rssi, nf, seq, status);
1888                 else if (algo == IEEE80211_AUTH_ALG_LEAP) {
1889                         authalgreject(ni, wh, algo,
1890                             seq+1, IEEE80211_STATUS_ALG);
1891                         return;
1892                 } else {
1893                         /*
1894                          * We assume that an unknown algorithm is the result
1895                          * of a decryption failure on a shared key auth frame;
1896                          * return a status code appropriate for that instead
1897                          * of IEEE80211_STATUS_ALG.
1898                          *
1899                          * NB: a seq# of 4 is intentional; the decrypted
1900                          *     frame likely has a bogus seq value.
1901                          */
1902                         authalgreject(ni, wh, algo,
1903                             4, IEEE80211_STATUS_CHALLENGE);
1904                         return;
1905                 }
1906                 break;
1907         }
1908
1909         case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
1910         case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: {
1911                 uint16_t capinfo, lintval;
1912                 struct ieee80211_rsnparms rsnparms;
1913
1914                 if (vap->iv_state != IEEE80211_S_RUN) {
1915                         vap->iv_stats.is_rx_mgtdiscard++;
1916                         return;
1917                 }
1918                 if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) {
1919                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1920                             wh, NULL, "%s", "wrong bssid");
1921                         vap->iv_stats.is_rx_assoc_bss++;
1922                         return;
1923                 }
1924                 if (subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) {
1925                         reassoc = 1;
1926                         resp = IEEE80211_FC0_SUBTYPE_REASSOC_RESP;
1927                 } else {
1928                         reassoc = 0;
1929                         resp = IEEE80211_FC0_SUBTYPE_ASSOC_RESP;
1930                 }
1931                 if (ni == vap->iv_bss) {
1932                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2,
1933                             "deny %s request, sta not authenticated",
1934                             reassoc ? "reassoc" : "assoc");
1935                         ieee80211_send_error(ni, wh->i_addr2,
1936                             IEEE80211_FC0_SUBTYPE_DEAUTH,
1937                             IEEE80211_REASON_ASSOC_NOT_AUTHED);
1938                         vap->iv_stats.is_rx_assoc_notauth++;
1939                         return;
1940                 }
1941
1942                 /*
1943                  * asreq frame format
1944                  *      [2] capability information
1945                  *      [2] listen interval
1946                  *      [6*] current AP address (reassoc only)
1947                  *      [tlv] ssid
1948                  *      [tlv] supported rates
1949                  *      [tlv] extended supported rates
1950                  *      [tlv] WPA or RSN
1951                  *      [tlv] HT capabilities
1952                  *      [tlv] Atheros capabilities
1953                  */
1954                 IEEE80211_VERIFY_LENGTH(efrm - frm, (reassoc ? 10 : 4), return);
1955                 capinfo = le16toh(*(uint16_t *)frm);    frm += 2;
1956                 lintval = le16toh(*(uint16_t *)frm);    frm += 2;
1957                 if (reassoc)
1958                         frm += 6;       /* ignore current AP info */
1959                 ssid = rates = xrates = wpa = rsn = wme = ath = htcap = NULL;
1960                 sfrm = frm;
1961                 while (efrm - frm > 1) {
1962                         IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1963                         switch (*frm) {
1964                         case IEEE80211_ELEMID_SSID:
1965                                 ssid = frm;
1966                                 break;
1967                         case IEEE80211_ELEMID_RATES:
1968                                 rates = frm;
1969                                 break;
1970                         case IEEE80211_ELEMID_XRATES:
1971                                 xrates = frm;
1972                                 break;
1973                         case IEEE80211_ELEMID_RSN:
1974                                 rsn = frm;
1975                                 break;
1976                         case IEEE80211_ELEMID_HTCAP:
1977                                 htcap = frm;
1978                                 break;
1979                         case IEEE80211_ELEMID_VENDOR:
1980                                 if (iswpaoui(frm))
1981                                         wpa = frm;
1982                                 else if (iswmeinfo(frm))
1983                                         wme = frm;
1984 #ifdef IEEE80211_SUPPORT_SUPERG
1985                                 else if (isatherosoui(frm))
1986                                         ath = frm;
1987 #endif
1988                                 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) {
1989                                         if (ishtcapoui(frm) && htcap == NULL)
1990                                                 htcap = frm;
1991                                 }
1992                                 break;
1993                         }
1994                         frm += frm[1] + 2;
1995                 }
1996                 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
1997                 if (xrates != NULL)
1998                         IEEE80211_VERIFY_ELEMENT(xrates,
1999                                 IEEE80211_RATE_MAXSIZE - rates[1], return);
2000                 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
2001                 IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return);
2002                 if (htcap != NULL) {
2003                         IEEE80211_VERIFY_LENGTH(htcap[1],
2004                              htcap[0] == IEEE80211_ELEMID_VENDOR ?
2005                                  4 + sizeof(struct ieee80211_ie_htcap)-2 :
2006                                  sizeof(struct ieee80211_ie_htcap)-2,
2007                              return);           /* XXX just NULL out? */
2008                 }
2009
2010                 if ((vap->iv_flags & IEEE80211_F_WPA) &&
2011                     !wpa_assocreq(ni, &rsnparms, wh, wpa, rsn, capinfo))
2012                         return;
2013                 /* discard challenge after association */
2014                 if (ni->ni_challenge != NULL) {
2015                         IEEE80211_FREE(ni->ni_challenge, M_80211_NODE);
2016                         ni->ni_challenge = NULL;
2017                 }
2018                 /* NB: 802.11 spec says to ignore station's privacy bit */
2019                 if ((capinfo & IEEE80211_CAPINFO_ESS) == 0) {
2020                         capinfomismatch(ni, wh, reassoc, resp,
2021                             "capability", capinfo);
2022                         return;
2023                 }
2024                 /*
2025                  * Disallow re-associate w/ invalid slot time setting.
2026                  */
2027                 if (ni->ni_associd != 0 &&
2028                     IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2029                     ((ni->ni_capinfo ^ capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME)) {
2030                         capinfomismatch(ni, wh, reassoc, resp,
2031                             "slot time", capinfo);
2032                         return;
2033                 }
2034                 rate = ieee80211_setup_rates(ni, rates, xrates,
2035                                 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
2036                                 IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
2037                 if (rate & IEEE80211_RATE_BASIC) {
2038                         ratesetmismatch(ni, wh, reassoc, resp, "legacy", rate);
2039                         vap->iv_stats.is_rx_assoc_norate++;
2040                         return;
2041                 }
2042                 /*
2043                  * If constrained to 11g-only stations reject an
2044                  * 11b-only station.  We cheat a bit here by looking
2045                  * at the max negotiated xmit rate and assuming anyone
2046                  * with a best rate <24Mb/s is an 11b station.
2047                  */
2048                 if ((vap->iv_flags & IEEE80211_F_PUREG) && rate < 48) {
2049                         ratesetmismatch(ni, wh, reassoc, resp, "11g", rate);
2050                         vap->iv_stats.is_rx_assoc_norate++;
2051                         return;
2052                 }
2053                 /*
2054                  * Do HT rate set handling and setup HT node state.
2055                  */
2056                 ni->ni_chan = vap->iv_bss->ni_chan;
2057                 if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && htcap != NULL) {
2058                         rate = ieee80211_setup_htrates(ni, htcap,
2059                                 IEEE80211_F_DOFMCS | IEEE80211_F_DONEGO |
2060                                 IEEE80211_F_DOBRS);
2061                         if (rate & IEEE80211_RATE_BASIC) {
2062                                 ratesetmismatch(ni, wh, reassoc, resp,
2063                                     "HT", rate);
2064                                 vap->iv_stats.is_ht_assoc_norate++;
2065                                 return;
2066                         }
2067                         ieee80211_ht_node_init(ni);
2068                         ieee80211_ht_updatehtcap(ni, htcap);
2069                 } else if (ni->ni_flags & IEEE80211_NODE_HT)
2070                         ieee80211_ht_node_cleanup(ni);
2071 #ifdef IEEE80211_SUPPORT_SUPERG
2072                 /* Always do ff node cleanup; for A-MSDU */
2073                 ieee80211_ff_node_cleanup(ni);
2074 #endif
2075                 /*
2076                  * Allow AMPDU operation only with unencrypted traffic
2077                  * or AES-CCM; the 11n spec only specifies these ciphers
2078                  * so permitting any others is undefined and can lead
2079                  * to interoperability problems.
2080                  */
2081                 if ((ni->ni_flags & IEEE80211_NODE_HT) &&
2082                     (((vap->iv_flags & IEEE80211_F_WPA) &&
2083                       rsnparms.rsn_ucastcipher != IEEE80211_CIPHER_AES_CCM) ||
2084                      (vap->iv_flags & (IEEE80211_F_WPA|IEEE80211_F_PRIVACY)) == IEEE80211_F_PRIVACY)) {
2085                         IEEE80211_NOTE(vap,
2086                             IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni,
2087                             "disallow HT use because WEP or TKIP requested, "
2088                             "capinfo 0x%x ucastcipher %d", capinfo,
2089                             rsnparms.rsn_ucastcipher);
2090                         ieee80211_ht_node_cleanup(ni);
2091 #ifdef IEEE80211_SUPPORT_SUPERG
2092                         /* Always do ff node cleanup; for A-MSDU */
2093                         ieee80211_ff_node_cleanup(ni);
2094 #endif
2095                         vap->iv_stats.is_ht_assoc_downgrade++;
2096                 }
2097                 /*
2098                  * If constrained to 11n-only stations reject legacy stations.
2099                  */
2100                 if ((vap->iv_flags_ht & IEEE80211_FHT_PUREN) &&
2101                     (ni->ni_flags & IEEE80211_NODE_HT) == 0) {
2102                         htcapmismatch(ni, wh, reassoc, resp);
2103                         vap->iv_stats.is_ht_assoc_nohtcap++;
2104                         return;
2105                 }
2106                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
2107                 ni->ni_noise = nf;
2108                 ni->ni_intval = lintval;
2109                 ni->ni_capinfo = capinfo;
2110                 ni->ni_fhdwell = vap->iv_bss->ni_fhdwell;
2111                 ni->ni_fhindex = vap->iv_bss->ni_fhindex;
2112                 /*
2113                  * Store the IEs.
2114                  * XXX maybe better to just expand
2115                  */
2116                 if (ieee80211_ies_init(&ni->ni_ies, sfrm, efrm - sfrm)) {
2117 #define setie(_ie, _off)        ieee80211_ies_setie(ni->ni_ies, _ie, _off)
2118                         if (wpa != NULL)
2119                                 setie(wpa_ie, wpa - sfrm);
2120                         if (rsn != NULL)
2121                                 setie(rsn_ie, rsn - sfrm);
2122                         if (htcap != NULL)
2123                                 setie(htcap_ie, htcap - sfrm);
2124                         if (wme != NULL) {
2125                                 setie(wme_ie, wme - sfrm);
2126                                 /*
2127                                  * Mark node as capable of QoS.
2128                                  */
2129                                 ni->ni_flags |= IEEE80211_NODE_QOS;
2130                         } else
2131                                 ni->ni_flags &= ~IEEE80211_NODE_QOS;
2132 #ifdef IEEE80211_SUPPORT_SUPERG
2133                         if (ath != NULL) {
2134                                 setie(ath_ie, ath - sfrm);
2135                                 /*
2136                                  * Parse ATH station parameters.
2137                                  */
2138                                 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
2139                         } else
2140 #endif
2141                                 ni->ni_ath_flags = 0;
2142 #undef setie
2143                 } else {
2144                         ni->ni_flags &= ~IEEE80211_NODE_QOS;
2145                         ni->ni_ath_flags = 0;
2146                 }
2147                 ieee80211_node_join(ni, resp);
2148                 ieee80211_deliver_l2uf(ni);
2149                 break;
2150         }
2151
2152         case IEEE80211_FC0_SUBTYPE_DEAUTH:
2153         case IEEE80211_FC0_SUBTYPE_DISASSOC: {
2154                 uint16_t reason;
2155
2156                 if (vap->iv_state != IEEE80211_S_RUN ||
2157                     /* NB: can happen when in promiscuous mode */
2158                     !IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) {
2159                         vap->iv_stats.is_rx_mgtdiscard++;
2160                         break;
2161                 }
2162                 /*
2163                  * deauth/disassoc frame format
2164                  *      [2] reason
2165                  */
2166                 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return);
2167                 reason = le16toh(*(uint16_t *)frm);
2168                 if (subtype == IEEE80211_FC0_SUBTYPE_DEAUTH) {
2169                         vap->iv_stats.is_rx_deauth++;
2170                         IEEE80211_NODE_STAT(ni, rx_deauth);
2171                 } else {
2172                         vap->iv_stats.is_rx_disassoc++;
2173                         IEEE80211_NODE_STAT(ni, rx_disassoc);
2174                 }
2175                 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni,
2176                     "recv %s (reason: %d (%s))",
2177                     ieee80211_mgt_subtype_name(subtype),
2178                     reason, ieee80211_reason_to_string(reason));
2179                 if (ni != vap->iv_bss)
2180                         ieee80211_node_leave(ni);
2181                 break;
2182         }
2183
2184         case IEEE80211_FC0_SUBTYPE_ACTION:
2185         case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
2186                 if (ni == vap->iv_bss) {
2187                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2188                             wh, NULL, "%s", "unknown node");
2189                         vap->iv_stats.is_rx_mgtdiscard++;
2190                 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
2191                     !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2192                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2193                             wh, NULL, "%s", "not for us");
2194                         vap->iv_stats.is_rx_mgtdiscard++;
2195                 } else if (vap->iv_state != IEEE80211_S_RUN) {
2196                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2197                             wh, NULL, "wrong state %s",
2198                             ieee80211_state_name[vap->iv_state]);
2199                         vap->iv_stats.is_rx_mgtdiscard++;
2200                 } else {
2201                         if (ieee80211_parse_action(ni, m0) == 0)
2202                                 (void)ic->ic_recv_action(ni, wh, frm, efrm);
2203                 }
2204                 break;
2205
2206         case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2207         case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2208         case IEEE80211_FC0_SUBTYPE_TIMING_ADV:
2209         case IEEE80211_FC0_SUBTYPE_ATIM:
2210                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2211                     wh, NULL, "%s", "not handled");
2212                 vap->iv_stats.is_rx_mgtdiscard++;
2213                 break;
2214
2215         default:
2216                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2217                     wh, "mgt", "subtype 0x%x not handled", subtype);
2218                 vap->iv_stats.is_rx_badsubtype++;
2219                 break;
2220         }
2221 }
2222
2223 static void
2224 hostap_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
2225 {
2226         switch (subtype) {
2227         case IEEE80211_FC0_SUBTYPE_PS_POLL:
2228                 ni->ni_vap->iv_recv_pspoll(ni, m);
2229                 break;
2230         case IEEE80211_FC0_SUBTYPE_BAR:
2231                 ieee80211_recv_bar(ni, m);
2232                 break;
2233         }
2234 }
2235
2236 /*
2237  * Process a received ps-poll frame.
2238  */
2239 void
2240 ieee80211_recv_pspoll(struct ieee80211_node *ni, struct mbuf *m0)
2241 {
2242         struct ieee80211vap *vap = ni->ni_vap;
2243         struct ieee80211com *ic = vap->iv_ic;
2244         struct ieee80211_frame_min *wh;
2245         struct mbuf *m;
2246         uint16_t aid;
2247         int qlen;
2248
2249         wh = mtod(m0, struct ieee80211_frame_min *);
2250         if (ni->ni_associd == 0) {
2251                 IEEE80211_DISCARD(vap,
2252                     IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG,
2253                     (struct ieee80211_frame *) wh, NULL,
2254                     "%s", "unassociated station");
2255                 vap->iv_stats.is_ps_unassoc++;
2256                 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH,
2257                         IEEE80211_REASON_NOT_ASSOCED);
2258                 return;
2259         }
2260
2261         aid = le16toh(*(uint16_t *)wh->i_dur);
2262         if (aid != ni->ni_associd) {
2263                 IEEE80211_DISCARD(vap,
2264                     IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG,
2265                     (struct ieee80211_frame *) wh, NULL,
2266                     "aid mismatch: sta aid 0x%x poll aid 0x%x",
2267                     ni->ni_associd, aid);
2268                 vap->iv_stats.is_ps_badaid++;
2269                 /*
2270                  * NB: We used to deauth the station but it turns out
2271                  * the Blackberry Curve 8230 (and perhaps other devices)
2272                  * sometimes send the wrong AID when WME is negotiated.
2273                  * Being more lenient here seems ok as we already check
2274                  * the station is associated and we only return frames
2275                  * queued for the station (i.e. we don't use the AID).
2276                  */
2277                 return;
2278         }
2279
2280         /* Okay, take the first queued packet and put it out... */
2281         m = ieee80211_node_psq_dequeue(ni, &qlen);
2282         if (m == NULL) {
2283                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_POWER, wh->i_addr2,
2284                     "%s", "recv ps-poll, but queue empty");
2285                 ieee80211_send_nulldata(ieee80211_ref_node(ni));
2286                 vap->iv_stats.is_ps_qempty++;   /* XXX node stat */
2287                 if (vap->iv_set_tim != NULL)
2288                         vap->iv_set_tim(ni, 0); /* just in case */
2289                 return;
2290         }
2291         /*
2292          * If there are more packets, set the more packets bit
2293          * in the packet dispatched to the station; otherwise
2294          * turn off the TIM bit.
2295          */
2296         if (qlen != 0) {
2297                 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
2298                     "recv ps-poll, send packet, %u still queued", qlen);
2299                 m->m_flags |= M_MORE_DATA;
2300         } else {
2301                 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
2302                     "%s", "recv ps-poll, send packet, queue empty");
2303                 if (vap->iv_set_tim != NULL)
2304                         vap->iv_set_tim(ni, 0);
2305         }
2306         m->m_flags |= M_PWR_SAV;                /* bypass PS handling */
2307
2308         /*
2309          * Do the right thing; if it's an encap'ed frame then
2310          * call ieee80211_parent_xmitpkt() else
2311          * call ieee80211_vap_xmitpkt().
2312          */
2313         if (m->m_flags & M_ENCAP) {
2314                 (void) ieee80211_parent_xmitpkt(ic, m);
2315         } else {
2316                 (void) ieee80211_vap_xmitpkt(vap, m);
2317         }
2318 }