net/ieee80211/ieee80211_rx.c

   1 /*
   2  * Original code based Host AP (software wireless LAN access point) driver
   3  * for Intersil Prism2/2.5/3 - hostap.o module, common routines
   4  *
   5  * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   6  * <jkmaline@cc.hut.fi>
   7  * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
   8  * Copyright (c) 2004-2005, Intel Corporation
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation. See README and COPYING for
  13  * more details.
  14  */
  15
  16 #include <linux/compiler.h>
  17 #include <linux/errno.h>
  18 #include <linux/if_arp.h>
  19 #include <linux/in6.h>
  20 #include <linux/in.h>
  21 #include <linux/ip.h>
  22 #include <linux/kernel.h>
  23 #include <linux/module.h>
  24 #include <linux/netdevice.h>
  25 #include <linux/proc_fs.h>
  26 #include <linux/skbuff.h>
  27 #include <linux/slab.h>
  28 #include <linux/tcp.h>
  29 #include <linux/types.h>
  30 #include <linux/wireless.h>
  31 #include <linux/etherdevice.h>
  32 #include <asm/uaccess.h>
  33 #include <linux/ctype.h>
  34
  35 #include <net/ieee80211.h>
  36
  37 static void ieee80211_monitor_rx(struct ieee80211_device *ieee,
  38                                         struct sk_buff *skb,
  39                                         struct ieee80211_rx_stats *rx_stats)
  40 {
  41         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
  42         u16 fc = le16_to_cpu(hdr->frame_ctl);
  43
  44         skb->dev = ieee->dev;
  45         skb->mac.raw = skb->data;
  46         skb_pull(skb, ieee80211_get_hdrlen(fc));
  47         skb->pkt_type = PACKET_OTHERHOST;
  48         skb->protocol = __constant_htons(ETH_P_80211_RAW);
  49         memset(skb->cb, 0, sizeof(skb->cb));
  50         netif_rx(skb);
  51 }
  52
  53 /* Called only as a tasklet (software IRQ) */
  54 static struct ieee80211_frag_entry *ieee80211_frag_cache_find(struct
  55                                                               ieee80211_device
  56                                                               *ieee,
  57                                                               unsigned int seq,
  58                                                               unsigned int frag,
  59                                                               u8 * src,
  60                                                               u8 * dst)
  61 {
  62         struct ieee80211_frag_entry *entry;
  63         int i;
  64
  65         for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) {
  66                 entry = &ieee->frag_cache[i];
  67                 if (entry->skb != NULL &&
  68                     time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
  69                         IEEE80211_DEBUG_FRAG("expiring fragment cache entry "
  70                                              "seq=%u last_frag=%u\n",
  71                                              entry->seq, entry->last_frag);
  72                         dev_kfree_skb_any(entry->skb);
  73                         entry->skb = NULL;
  74                 }
  75
  76                 if (entry->skb != NULL && entry->seq == seq &&
  77                     (entry->last_frag + 1 == frag || frag == -1) &&
  78                     !compare_ether_addr(entry->src_addr, src) &&
  79                     !compare_ether_addr(entry->dst_addr, dst))
  80                         return entry;
  81         }
  82
  83         return NULL;
  84 }
  85
  86 /* Called only as a tasklet (software IRQ) */
  87 static struct sk_buff *ieee80211_frag_cache_get(struct ieee80211_device *ieee,
  88                                                 struct ieee80211_hdr_4addr *hdr)
  89 {
  90         struct sk_buff *skb = NULL;
  91         u16 sc;
  92         unsigned int frag, seq;
  93         struct ieee80211_frag_entry *entry;
  94
  95         sc = le16_to_cpu(hdr->seq_ctl);
  96         frag = WLAN_GET_SEQ_FRAG(sc);
  97         seq = WLAN_GET_SEQ_SEQ(sc);
  98
  99         if (frag == 0) {
 100                 /* Reserve enough space to fit maximum frame length */
 101                 skb = dev_alloc_skb(ieee->dev->mtu +
 102                                     sizeof(struct ieee80211_hdr_4addr) +
 103                                     8 /* LLC */  +
 104                                     2 /* alignment */  +
 105                                     8 /* WEP */  + ETH_ALEN /* WDS */ );
 106                 if (skb == NULL)
 107                         return NULL;
 108
 109                 entry = &ieee->frag_cache[ieee->frag_next_idx];
 110                 ieee->frag_next_idx++;
 111                 if (ieee->frag_next_idx >= IEEE80211_FRAG_CACHE_LEN)
 112                         ieee->frag_next_idx = 0;
 113
 114                 if (entry->skb != NULL)
 115                         dev_kfree_skb_any(entry->skb);
 116
 117                 entry->first_frag_time = jiffies;
 118                 entry->seq = seq;
 119                 entry->last_frag = frag;
 120                 entry->skb = skb;
 121                 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
 122                 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
 123         } else {
 124                 /* received a fragment of a frame for which the head fragment
 125                  * should have already been received */
 126                 entry = ieee80211_frag_cache_find(ieee, seq, frag, hdr->addr2,
 127                                                   hdr->addr1);
 128                 if (entry != NULL) {
 129                         entry->last_frag = frag;
 130                         skb = entry->skb;
 131                 }
 132         }
 133
 134         return skb;
 135 }
 136
 137 /* Called only as a tasklet (software IRQ) */
 138 static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee,
 139                                            struct ieee80211_hdr_4addr *hdr)
 140 {
 141         u16 sc;
 142         unsigned int seq;
 143         struct ieee80211_frag_entry *entry;
 144
 145         sc = le16_to_cpu(hdr->seq_ctl);
 146         seq = WLAN_GET_SEQ_SEQ(sc);
 147
 148         entry = ieee80211_frag_cache_find(ieee, seq, -1, hdr->addr2,
 149                                           hdr->addr1);
 150
 151         if (entry == NULL) {
 152                 IEEE80211_DEBUG_FRAG("could not invalidate fragment cache "
 153                                      "entry (seq=%u)\n", seq);
 154                 return -1;
 155         }
 156
 157         entry->skb = NULL;
 158         return 0;
 159 }
 160
 161 #ifdef NOT_YET
 162 /* ieee80211_rx_frame_mgtmt
 163  *
 164  * Responsible for handling management control frames
 165  *
 166  * Called by ieee80211_rx */
 167 static int
 168 ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb,
 169                         struct ieee80211_rx_stats *rx_stats, u16 type,
 170                         u16 stype)
 171 {
 172         if (ieee->iw_mode == IW_MODE_MASTER) {
 173                 printk(KERN_DEBUG "%s: Master mode not yet suppported.\n",
 174                        ieee->dev->name);
 175                 return 0;
 176 /*
 177   hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr_4addr *)
 178   skb->data);*/
 179         }
 180
 181         if (ieee->hostapd && type == WLAN_FC_TYPE_MGMT) {
 182                 if (stype == WLAN_FC_STYPE_BEACON &&
 183                     ieee->iw_mode == IW_MODE_MASTER) {
 184                         struct sk_buff *skb2;
 185                         /* Process beacon frames also in kernel driver to
 186                          * update STA(AP) table statistics */
 187                         skb2 = skb_clone(skb, GFP_ATOMIC);
 188                         if (skb2)
 189                                 hostap_rx(skb2->dev, skb2, rx_stats);
 190                 }
 191
 192                 /* send management frames to the user space daemon for
 193                  * processing */
 194                 ieee->apdevstats.rx_packets++;
 195                 ieee->apdevstats.rx_bytes += skb->len;
 196                 prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
 197                 return 0;
 198         }
 199
 200         if (ieee->iw_mode == IW_MODE_MASTER) {
 201                 if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
 202                         printk(KERN_DEBUG "%s: unknown management frame "
 203                                "(type=0x%02x, stype=0x%02x) dropped\n",
 204                                skb->dev->name, type, stype);
 205                         return -1;
 206                 }
 207
 208                 hostap_rx(skb->dev, skb, rx_stats);
 209                 return 0;
 210         }
 211
 212         printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame "
 213                "received in non-Host AP mode\n", skb->dev->name);
 214         return -1;
 215 }
 216 #endif
 217
 218 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
 219 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
 220 static unsigned char rfc1042_header[] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
 221
 222 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
 223 static unsigned char bridge_tunnel_header[] =
 224     { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
 225 /* No encapsulation header if EtherType < 0x600 (=length) */
 226
 227 /* Called by ieee80211_rx_frame_decrypt */
 228 static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee,
 229                                     struct sk_buff *skb)
 230 {
 231         struct net_device *dev = ieee->dev;
 232         u16 fc, ethertype;
 233         struct ieee80211_hdr_3addr *hdr;
 234         u8 *pos;
 235
 236         if (skb->len < 24)
 237                 return 0;
 238
 239         hdr = (struct ieee80211_hdr_3addr *)skb->data;
 240         fc = le16_to_cpu(hdr->frame_ctl);
 241
 242         /* check that the frame is unicast frame to us */
 243         if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 244             IEEE80211_FCTL_TODS &&
 245             !compare_ether_addr(hdr->addr1, dev->dev_addr) &&
 246             !compare_ether_addr(hdr->addr3, dev->dev_addr)) {
 247                 /* ToDS frame with own addr BSSID and DA */
 248         } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 249                    IEEE80211_FCTL_FROMDS &&
 250                    !compare_ether_addr(hdr->addr1, dev->dev_addr)) {
 251                 /* FromDS frame with own addr as DA */
 252         } else
 253                 return 0;
 254
 255         if (skb->len < 24 + 8)
 256                 return 0;
 257
 258         /* check for port access entity Ethernet type */
 259         pos = skb->data + 24;
 260         ethertype = (pos[6] << 8) | pos[7];
 261         if (ethertype == ETH_P_PAE)
 262                 return 1;
 263
 264         return 0;
 265 }
 266
 267 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
 268 static int
 269 ieee80211_rx_frame_decrypt(struct ieee80211_device *ieee, struct sk_buff *skb,
 270                            struct ieee80211_crypt_data *crypt)
 271 {
 272         struct ieee80211_hdr_3addr *hdr;
 273         int res, hdrlen;
 274
 275         if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
 276                 return 0;
 277
 278         hdr = (struct ieee80211_hdr_3addr *)skb->data;
 279         hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 280
 281         atomic_inc(&crypt->refcnt);
 282         res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
 283         atomic_dec(&crypt->refcnt);
 284         if (res < 0) {
 285                 IEEE80211_DEBUG_DROP("decryption failed (SA=" MAC_FMT
 286                                      ") res=%d\n", MAC_ARG(hdr->addr2), res);
 287                 if (res == -2)
 288                         IEEE80211_DEBUG_DROP("Decryption failed ICV "
 289                                              "mismatch (key %d)\n",
 290                                              skb->data[hdrlen + 3] >> 6);
 291                 ieee->ieee_stats.rx_discards_undecryptable++;
 292                 return -1;
 293         }
 294
 295         return res;
 296 }
 297
 298 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
 299 static int
 300 ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device *ieee,
 301                                 struct sk_buff *skb, int keyidx,
 302                                 struct ieee80211_crypt_data *crypt)
 303 {
 304         struct ieee80211_hdr_3addr *hdr;
 305         int res, hdrlen;
 306
 307         if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
 308                 return 0;
 309
 310         hdr = (struct ieee80211_hdr_3addr *)skb->data;
 311         hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 312
 313         atomic_inc(&crypt->refcnt);
 314         res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
 315         atomic_dec(&crypt->refcnt);
 316         if (res < 0) {
 317                 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
 318                        " (SA=" MAC_FMT " keyidx=%d)\n",
 319                        ieee->dev->name, MAC_ARG(hdr->addr2), keyidx);
 320                 return -1;
 321         }
 322
 323         return 0;
 324 }
 325
 326 /* All received frames are sent to this function. @skb contains the frame in
 327  * IEEE 802.11 format, i.e., in the format it was sent over air.
 328  * This function is called only as a tasklet (software IRQ). */
 329 int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
 330                  struct ieee80211_rx_stats *rx_stats)
 331 {
 332         struct net_device *dev = ieee->dev;
 333         struct ieee80211_hdr_4addr *hdr;
 334         size_t hdrlen;
 335         u16 fc, type, stype, sc;
 336         struct net_device_stats *stats;
 337         unsigned int frag;
 338         u8 *payload;
 339         u16 ethertype;
 340 #ifdef NOT_YET
 341         struct net_device *wds = NULL;
 342         struct sk_buff *skb2 = NULL;
 343         struct net_device *wds = NULL;
 344         int frame_authorized = 0;
 345         int from_assoc_ap = 0;
 346         void *sta = NULL;
 347 #endif
 348         u8 dst[ETH_ALEN];
 349         u8 src[ETH_ALEN];
 350         struct ieee80211_crypt_data *crypt = NULL;
 351         int keyidx = 0;
 352         int can_be_decrypted = 0;
 353
 354         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 355         stats = &ieee->stats;
 356
 357         if (skb->len < 10) {
 358                 printk(KERN_INFO "%s: SKB length < 10\n", dev->name);
 359                 goto rx_dropped;
 360         }
 361
 362         fc = le16_to_cpu(hdr->frame_ctl);
 363         type = WLAN_FC_GET_TYPE(fc);
 364         stype = WLAN_FC_GET_STYPE(fc);
 365         sc = le16_to_cpu(hdr->seq_ctl);
 366         frag = WLAN_GET_SEQ_FRAG(sc);
 367         hdrlen = ieee80211_get_hdrlen(fc);
 368
 369         /* Put this code here so that we avoid duplicating it in all
 370          * Rx paths. - Jean II */
 371 #ifdef CONFIG_WIRELESS_EXT
 372 #ifdef IW_WIRELESS_SPY          /* defined in iw_handler.h */
 373         /* If spy monitoring on */
 374         if (ieee->spy_data.spy_number > 0) {
 375                 struct iw_quality wstats;
 376
 377                 wstats.updated = 0;
 378                 if (rx_stats->mask & IEEE80211_STATMASK_RSSI) {
 379                         wstats.level = rx_stats->rssi;
 380                         wstats.updated |= IW_QUAL_LEVEL_UPDATED;
 381                 } else
 382                         wstats.updated |= IW_QUAL_LEVEL_INVALID;
 383
 384                 if (rx_stats->mask & IEEE80211_STATMASK_NOISE) {
 385                         wstats.noise = rx_stats->noise;
 386                         wstats.updated |= IW_QUAL_NOISE_UPDATED;
 387                 } else
 388                         wstats.updated |= IW_QUAL_NOISE_INVALID;
 389
 390                 if (rx_stats->mask & IEEE80211_STATMASK_SIGNAL) {
 391                         wstats.qual = rx_stats->signal;
 392                         wstats.updated |= IW_QUAL_QUAL_UPDATED;
 393                 } else
 394                         wstats.updated |= IW_QUAL_QUAL_INVALID;
 395
 396                 /* Update spy records */
 397                 wireless_spy_update(ieee->dev, hdr->addr2, &wstats);
 398         }
 399 #endif                          /* IW_WIRELESS_SPY */
 400 #endif                          /* CONFIG_WIRELESS_EXT */
 401
 402 #ifdef NOT_YET
 403         hostap_update_rx_stats(local->ap, hdr, rx_stats);
 404 #endif
 405
 406         if (ieee->iw_mode == IW_MODE_MONITOR) {
 407                 stats->rx_packets++;
 408                 stats->rx_bytes += skb->len;
 409                 ieee80211_monitor_rx(ieee, skb, rx_stats);
 410                 return 1;
 411         }
 412
 413         can_be_decrypted = (is_multicast_ether_addr(hdr->addr1) ||
 414                             is_broadcast_ether_addr(hdr->addr2)) ?
 415             ieee->host_mc_decrypt : ieee->host_decrypt;
 416
 417         if (can_be_decrypted) {
 418                 int idx = 0;
 419                 if (skb->len >= hdrlen + 3) {
 420                         /* Top two-bits of byte 3 are the key index */
 421                         idx = skb->data[hdrlen + 3] >> 6;
 422                 }
 423
 424                 /* ieee->crypt[] is WEP_KEY (4) in length.  Given that idx
 425                  * is only allowed 2-bits of storage, no value of idx can
 426                  * be provided via above code that would result in idx
 427                  * being out of range */
 428                 crypt = ieee->crypt[idx];
 429
 430 #ifdef NOT_YET
 431                 sta = NULL;
 432
 433                 /* Use station specific key to override default keys if the
 434                  * receiver address is a unicast address ("individual RA"). If
 435                  * bcrx_sta_key parameter is set, station specific key is used
 436                  * even with broad/multicast targets (this is against IEEE
 437                  * 802.11, but makes it easier to use different keys with
 438                  * stations that do not support WEP key mapping). */
 439
 440                 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
 441                         (void)hostap_handle_sta_crypto(local, hdr, &crypt,
 442                                                        &sta);
 443 #endif
 444
 445                 /* allow NULL decrypt to indicate an station specific override
 446                  * for default encryption */
 447                 if (crypt && (crypt->ops == NULL ||
 448                               crypt->ops->decrypt_mpdu == NULL))
 449                         crypt = NULL;
 450
 451                 if (!crypt && (fc & IEEE80211_FCTL_PROTECTED)) {
 452                         /* This seems to be triggered by some (multicast?)
 453                          * frames from other than current BSS, so just drop the
 454                          * frames silently instead of filling system log with
 455                          * these reports. */
 456                         IEEE80211_DEBUG_DROP("Decryption failed (not set)"
 457                                              " (SA=" MAC_FMT ")\n",
 458                                              MAC_ARG(hdr->addr2));
 459                         ieee->ieee_stats.rx_discards_undecryptable++;
 460                         goto rx_dropped;
 461                 }
 462         }
 463 #ifdef NOT_YET
 464         if (type != WLAN_FC_TYPE_DATA) {
 465                 if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_AUTH &&
 466                     fc & IEEE80211_FCTL_PROTECTED && ieee->host_decrypt &&
 467                     (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0) {
 468                         printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
 469                                "from " MAC_FMT "\n", dev->name,
 470                                MAC_ARG(hdr->addr2));
 471                         /* TODO: could inform hostapd about this so that it
 472                          * could send auth failure report */
 473                         goto rx_dropped;
 474                 }
 475
 476                 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
 477                         goto rx_dropped;
 478                 else
 479                         goto rx_exit;
 480         }
 481 #endif
 482
 483         /* Data frame - extract src/dst addresses */
 484         if (skb->len < IEEE80211_3ADDR_LEN)
 485                 goto rx_dropped;
 486
 487         switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
 488         case IEEE80211_FCTL_FROMDS:
 489                 memcpy(dst, hdr->addr1, ETH_ALEN);
 490                 memcpy(src, hdr->addr3, ETH_ALEN);
 491                 break;
 492         case IEEE80211_FCTL_TODS:
 493                 memcpy(dst, hdr->addr3, ETH_ALEN);
 494                 memcpy(src, hdr->addr2, ETH_ALEN);
 495                 break;
 496         case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
 497                 if (skb->len < IEEE80211_4ADDR_LEN)
 498                         goto rx_dropped;
 499                 memcpy(dst, hdr->addr3, ETH_ALEN);
 500                 memcpy(src, hdr->addr4, ETH_ALEN);
 501                 break;
 502         case 0:
 503                 memcpy(dst, hdr->addr1, ETH_ALEN);
 504                 memcpy(src, hdr->addr2, ETH_ALEN);
 505                 break;
 506         }
 507
 508 #ifdef NOT_YET
 509         if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
 510                 goto rx_dropped;
 511         if (wds) {
 512                 skb->dev = dev = wds;
 513                 stats = hostap_get_stats(dev);
 514         }
 515
 516         if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
 517             (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 518             IEEE80211_FCTL_FROMDS && ieee->stadev
 519             && !compare_ether_addr(hdr->addr2, ieee->assoc_ap_addr)) {
 520                 /* Frame from BSSID of the AP for which we are a client */
 521                 skb->dev = dev = ieee->stadev;
 522                 stats = hostap_get_stats(dev);
 523                 from_assoc_ap = 1;
 524         }
 525 #endif
 526
 527         dev->last_rx = jiffies;
 528
 529 #ifdef NOT_YET
 530         if ((ieee->iw_mode == IW_MODE_MASTER ||
 531              ieee->iw_mode == IW_MODE_REPEAT) && !from_assoc_ap) {
 532                 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
 533                                              wds != NULL)) {
 534                 case AP_RX_CONTINUE_NOT_AUTHORIZED:
 535                         frame_authorized = 0;
 536                         break;
 537                 case AP_RX_CONTINUE:
 538                         frame_authorized = 1;
 539                         break;
 540                 case AP_RX_DROP:
 541                         goto rx_dropped;
 542                 case AP_RX_EXIT:
 543                         goto rx_exit;
 544                 }
 545         }
 546 #endif
 547
 548         /* Nullfunc frames may have PS-bit set, so they must be passed to
 549          * hostap_handle_sta_rx() before being dropped here. */
 550
 551         stype &= ~IEEE80211_STYPE_QOS_DATA;
 552
 553         if (stype != IEEE80211_STYPE_DATA &&
 554             stype != IEEE80211_STYPE_DATA_CFACK &&
 555             stype != IEEE80211_STYPE_DATA_CFPOLL &&
 556             stype != IEEE80211_STYPE_DATA_CFACKPOLL) {
 557                 if (stype != IEEE80211_STYPE_NULLFUNC)
 558                         IEEE80211_DEBUG_DROP("RX: dropped data frame "
 559                                              "with no data (type=0x%02x, "
 560                                              "subtype=0x%02x, len=%d)\n",
 561                                              type, stype, skb->len);
 562                 goto rx_dropped;
 563         }
 564
 565         /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
 566
 567         if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 568             (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
 569                 goto rx_dropped;
 570
 571         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 572
 573         /* skb: hdr + (possibly fragmented) plaintext payload */
 574         // PR: FIXME: hostap has additional conditions in the "if" below:
 575         // ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
 576         if ((frag != 0) || (fc & IEEE80211_FCTL_MOREFRAGS)) {
 577                 int flen;
 578                 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
 579                 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
 580
 581                 if (!frag_skb) {
 582                         IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
 583                                         "Rx cannot get skb from fragment "
 584                                         "cache (morefrag=%d seq=%u frag=%u)\n",
 585                                         (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
 586                                         WLAN_GET_SEQ_SEQ(sc), frag);
 587                         goto rx_dropped;
 588                 }
 589
 590                 flen = skb->len;
 591                 if (frag != 0)
 592                         flen -= hdrlen;
 593
 594                 if (frag_skb->tail + flen > frag_skb->end) {
 595                         printk(KERN_WARNING "%s: host decrypted and "
 596                                "reassembled frame did not fit skb\n",
 597                                dev->name);
 598                         ieee80211_frag_cache_invalidate(ieee, hdr);
 599                         goto rx_dropped;
 600                 }
 601
 602                 if (frag == 0) {
 603                         /* copy first fragment (including full headers) into
 604                          * beginning of the fragment cache skb */
 605                         memcpy(skb_put(frag_skb, flen), skb->data, flen);
 606                 } else {
 607                         /* append frame payload to the end of the fragment
 608                          * cache skb */
 609                         memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
 610                                flen);
 611                 }
 612                 dev_kfree_skb_any(skb);
 613                 skb = NULL;
 614
 615                 if (fc & IEEE80211_FCTL_MOREFRAGS) {
 616                         /* more fragments expected - leave the skb in fragment
 617                          * cache for now; it will be delivered to upper layers
 618                          * after all fragments have been received */
 619                         goto rx_exit;
 620                 }
 621
 622                 /* this was the last fragment and the frame will be
 623                  * delivered, so remove skb from fragment cache */
 624                 skb = frag_skb;
 625                 hdr = (struct ieee80211_hdr_4addr *)skb->data;
 626                 ieee80211_frag_cache_invalidate(ieee, hdr);
 627         }
 628
 629         /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
 630          * encrypted/authenticated */
 631         if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 632             ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
 633                 goto rx_dropped;
 634
 635         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 636         if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) {
 637                 if (            /*ieee->ieee802_1x && */
 638                            ieee80211_is_eapol_frame(ieee, skb)) {
 639                         /* pass unencrypted EAPOL frames even if encryption is
 640                          * configured */
 641                 } else {
 642                         IEEE80211_DEBUG_DROP("encryption configured, but RX "
 643                                              "frame not encrypted (SA=" MAC_FMT
 644                                              ")\n", MAC_ARG(hdr->addr2));
 645                         goto rx_dropped;
 646                 }
 647         }
 648
 649         if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep &&
 650             !ieee80211_is_eapol_frame(ieee, skb)) {
 651                 IEEE80211_DEBUG_DROP("dropped unencrypted RX data "
 652                                      "frame from " MAC_FMT
 653                                      " (drop_unencrypted=1)\n",
 654                                      MAC_ARG(hdr->addr2));
 655                 goto rx_dropped;
 656         }
 657
 658         /* skb: hdr + (possible reassembled) full plaintext payload */
 659
 660         payload = skb->data + hdrlen;
 661         ethertype = (payload[6] << 8) | payload[7];
 662
 663 #ifdef NOT_YET
 664         /* If IEEE 802.1X is used, check whether the port is authorized to send
 665          * the received frame. */
 666         if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) {
 667                 if (ethertype == ETH_P_PAE) {
 668                         printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n",
 669                                dev->name);
 670                         if (ieee->hostapd && ieee->apdev) {
 671                                 /* Send IEEE 802.1X frames to the user
 672                                  * space daemon for processing */
 673                                 prism2_rx_80211(ieee->apdev, skb, rx_stats,
 674                                                 PRISM2_RX_MGMT);
 675                                 ieee->apdevstats.rx_packets++;
 676                                 ieee->apdevstats.rx_bytes += skb->len;
 677                                 goto rx_exit;
 678                         }
 679                 } else if (!frame_authorized) {
 680                         printk(KERN_DEBUG "%s: dropped frame from "
 681                                "unauthorized port (IEEE 802.1X): "
 682                                "ethertype=0x%04x\n", dev->name, ethertype);
 683                         goto rx_dropped;
 684                 }
 685         }
 686 #endif
 687
 688         /* convert hdr + possible LLC headers into Ethernet header */
 689         if (skb->len - hdrlen >= 8 &&
 690             ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 &&
 691               ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
 692              memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) {
 693                 /* remove RFC1042 or Bridge-Tunnel encapsulation and
 694                  * replace EtherType */
 695                 skb_pull(skb, hdrlen + SNAP_SIZE);
 696                 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 697                 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 698         } else {
 699                 u16 len;
 700                 /* Leave Ethernet header part of hdr and full payload */
 701                 skb_pull(skb, hdrlen);
 702                 len = htons(skb->len);
 703                 memcpy(skb_push(skb, 2), &len, 2);
 704                 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 705                 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 706         }
 707
 708 #ifdef NOT_YET
 709         if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 710                     IEEE80211_FCTL_TODS) && skb->len >= ETH_HLEN + ETH_ALEN) {
 711                 /* Non-standard frame: get addr4 from its bogus location after
 712                  * the payload */
 713                 memcpy(skb->data + ETH_ALEN,
 714                        skb->data + skb->len - ETH_ALEN, ETH_ALEN);
 715                 skb_trim(skb, skb->len - ETH_ALEN);
 716         }
 717 #endif
 718
 719         stats->rx_packets++;
 720         stats->rx_bytes += skb->len;
 721
 722 #ifdef NOT_YET
 723         if (ieee->iw_mode == IW_MODE_MASTER && !wds && ieee->ap->bridge_packets) {
 724                 if (dst[0] & 0x01) {
 725                         /* copy multicast frame both to the higher layers and
 726                          * to the wireless media */
 727                         ieee->ap->bridged_multicast++;
 728                         skb2 = skb_clone(skb, GFP_ATOMIC);
 729                         if (skb2 == NULL)
 730                                 printk(KERN_DEBUG "%s: skb_clone failed for "
 731                                        "multicast frame\n", dev->name);
 732                 } else if (hostap_is_sta_assoc(ieee->ap, dst)) {
 733                         /* send frame directly to the associated STA using
 734                          * wireless media and not passing to higher layers */
 735                         ieee->ap->bridged_unicast++;
 736                         skb2 = skb;
 737                         skb = NULL;
 738                 }
 739         }
 740
 741         if (skb2 != NULL) {
 742                 /* send to wireless media */
 743                 skb2->protocol = __constant_htons(ETH_P_802_3);
 744                 skb2->mac.raw = skb2->nh.raw = skb2->data;
 745                 /* skb2->nh.raw = skb2->data + ETH_HLEN; */
 746                 skb2->dev = dev;
 747                 dev_queue_xmit(skb2);
 748         }
 749 #endif
 750
 751         if (skb) {
 752                 skb->protocol = eth_type_trans(skb, dev);
 753                 memset(skb->cb, 0, sizeof(skb->cb));
 754                 skb->dev = dev;
 755                 skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
 756                 if (netif_rx(skb) == NET_RX_DROP) {
 757                         /* netif_rx always succeeds, but it might drop
 758                          * the packet.  If it drops the packet, we log that
 759                          * in our stats. */
 760                         IEEE80211_DEBUG_DROP
 761                             ("RX: netif_rx dropped the packet\n");
 762                         stats->rx_dropped++;
 763                 }
 764         }
 765
 766       rx_exit:
 767 #ifdef NOT_YET
 768         if (sta)
 769                 hostap_handle_sta_release(sta);
 770 #endif
 771         return 1;
 772
 773       rx_dropped:
 774         stats->rx_dropped++;
 775
 776         /* Returning 0 indicates to caller that we have not handled the SKB--
 777          * so it is still allocated and can be used again by underlying
 778          * hardware as a DMA target */
 779         return 0;
 780 }
 781
 782 /* Filter out unrelated packets, call ieee80211_rx[_mgt]
 783  * This function takes over the skb, it should not be used again after calling
 784  * this function. */
 785 void ieee80211_rx_any(struct ieee80211_device *ieee,
 786                      struct sk_buff *skb, struct ieee80211_rx_stats *stats)
 787 {
 788         struct ieee80211_hdr_4addr *hdr;
 789         int is_packet_for_us;
 790         u16 fc;
 791
 792         if (ieee->iw_mode == IW_MODE_MONITOR) {
 793                 if (!ieee80211_rx(ieee, skb, stats))
 794                         dev_kfree_skb_irq(skb);
 795                 return;
 796         }
 797
 798         if (skb->len < sizeof(struct ieee80211_hdr))
 799                 goto drop_free;
 800
 801         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 802         fc = le16_to_cpu(hdr->frame_ctl);
 803
 804         if ((fc & IEEE80211_FCTL_VERS) != 0)
 805                 goto drop_free;
 806
 807         switch (fc & IEEE80211_FCTL_FTYPE) {
 808         case IEEE80211_FTYPE_MGMT:
 809                 if (skb->len < sizeof(struct ieee80211_hdr_3addr))
 810                         goto drop_free;
 811                 ieee80211_rx_mgt(ieee, hdr, stats);
 812                 dev_kfree_skb_irq(skb);
 813                 return;
 814         case IEEE80211_FTYPE_DATA:
 815                 break;
 816         case IEEE80211_FTYPE_CTL:
 817                 return;
 818         default:
 819                 return;
 820         }
 821
 822         is_packet_for_us = 0;
 823         switch (ieee->iw_mode) {
 824         case IW_MODE_ADHOC:
 825                 /* our BSS and not from/to DS */
 826                 if (memcmp(hdr->addr3, ieee->bssid, ETH_ALEN) == 0)
 827                 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == 0) {
 828                         /* promisc: get all */
 829                         if (ieee->dev->flags & IFF_PROMISC)
 830                                 is_packet_for_us = 1;
 831                         /* to us */
 832                         else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
 833                                 is_packet_for_us = 1;
 834                         /* mcast */
 835                         else if (is_multicast_ether_addr(hdr->addr1))
 836                                 is_packet_for_us = 1;
 837                 }
 838                 break;
 839         case IW_MODE_INFRA:
 840                 /* our BSS (== from our AP) and from DS */
 841                 if (memcmp(hdr->addr2, ieee->bssid, ETH_ALEN) == 0)
 842                 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS) {
 843                         /* promisc: get all */
 844                         if (ieee->dev->flags & IFF_PROMISC)
 845                                 is_packet_for_us = 1;
 846                         /* to us */
 847                         else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
 848                                 is_packet_for_us = 1;
 849                         /* mcast */
 850                         else if (is_multicast_ether_addr(hdr->addr1)) {
 851                                 /* not our own packet bcasted from AP */
 852                                 if (memcmp(hdr->addr3, ieee->dev->dev_addr, ETH_ALEN))
 853                                         is_packet_for_us = 1;
 854                         }
 855                 }
 856                 break;
 857         default:
 858                 /* ? */
 859                 break;
 860         }
 861
 862         if (is_packet_for_us)
 863                 if (!ieee80211_rx(ieee, skb, stats))
 864                         dev_kfree_skb_irq(skb);
 865         return;
 866
 867 drop_free:
 868         dev_kfree_skb_irq(skb);
 869         ieee->stats.rx_dropped++;
 870         return;
 871 }
 872
 873 #define MGMT_FRAME_FIXED_PART_LENGTH            0x24
 874
 875 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
 876
 877 /*
 878 * Make ther structure we read from the beacon packet has
 879 * the right values
 880 */
 881 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
 882                                      *info_element, int sub_type)
 883 {
 884
 885         if (info_element->qui_subtype != sub_type)
 886                 return -1;
 887         if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
 888                 return -1;
 889         if (info_element->qui_type != QOS_OUI_TYPE)
 890                 return -1;
 891         if (info_element->version != QOS_VERSION_1)
 892                 return -1;
 893
 894         return 0;
 895 }
 896
 897 /*
 898  * Parse a QoS parameter element
 899  */
 900 static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
 901                                             *element_param, struct ieee80211_info_element
 902                                             *info_element)
 903 {
 904         int ret = 0;
 905         u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2;
 906
 907         if ((info_element == NULL) || (element_param == NULL))
 908                 return -1;
 909
 910         if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
 911                 memcpy(element_param->info_element.qui, info_element->data,
 912                        info_element->len);
 913                 element_param->info_element.elementID = info_element->id;
 914                 element_param->info_element.length = info_element->len;
 915         } else
 916                 ret = -1;
 917         if (ret == 0)
 918                 ret = ieee80211_verify_qos_info(&element_param->info_element,
 919                                                 QOS_OUI_PARAM_SUB_TYPE);
 920         return ret;
 921 }
 922
 923 /*
 924  * Parse a QoS information element
 925  */
 926 static int ieee80211_read_qos_info_element(struct
 927                                            ieee80211_qos_information_element
 928                                            *element_info, struct ieee80211_info_element
 929                                            *info_element)
 930 {
 931         int ret = 0;
 932         u16 size = sizeof(struct ieee80211_qos_information_element) - 2;
 933
 934         if (element_info == NULL)
 935                 return -1;
 936         if (info_element == NULL)
 937                 return -1;
 938
 939         if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
 940                 memcpy(element_info->qui, info_element->data,
 941                        info_element->len);
 942                 element_info->elementID = info_element->id;
 943                 element_info->length = info_element->len;
 944         } else
 945                 ret = -1;
 946
 947         if (ret == 0)
 948                 ret = ieee80211_verify_qos_info(element_info,
 949                                                 QOS_OUI_INFO_SUB_TYPE);
 950         return ret;
 951 }
 952
 953 /*
 954  * Write QoS parameters from the ac parameters.
 955  */
 956 static int ieee80211_qos_convert_ac_to_parameters(struct
 957                                                   ieee80211_qos_parameter_info
 958                                                   *param_elm, struct
 959                                                   ieee80211_qos_parameters
 960                                                   *qos_param)
 961 {
 962         int rc = 0;
 963         int i;
 964         struct ieee80211_qos_ac_parameter *ac_params;
 965         u32 txop;
 966         u8 cw_min;
 967         u8 cw_max;
 968
 969         for (i = 0; i < QOS_QUEUE_NUM; i++) {
 970                 ac_params = &(param_elm->ac_params_record[i]);
 971
 972                 qos_param->aifs[i] = (ac_params->aci_aifsn) & 0x0F;
 973                 qos_param->aifs[i] -= (qos_param->aifs[i] < 2) ? 0 : 2;
 974
 975                 cw_min = ac_params->ecw_min_max & 0x0F;
 976                 qos_param->cw_min[i] = (u16) ((1 << cw_min) - 1);
 977
 978                 cw_max = (ac_params->ecw_min_max & 0xF0) >> 4;
 979                 qos_param->cw_max[i] = (u16) ((1 << cw_max) - 1);
 980
 981                 qos_param->flag[i] =
 982                     (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
 983
 984                 txop = le16_to_cpu(ac_params->tx_op_limit) * 32;
 985                 qos_param->tx_op_limit[i] = (u16) txop;
 986         }
 987         return rc;
 988 }
 989
 990 /*
 991  * we have a generic data element which it may contain QoS information or
 992  * parameters element. check the information element length to decide
 993  * which type to read
 994  */
 995 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
 996                                              *info_element,
 997                                              struct ieee80211_network *network)
 998 {
 999         int rc = 0;
1000         struct ieee80211_qos_parameters *qos_param = NULL;
1001         struct ieee80211_qos_information_element qos_info_element;
1002
1003         rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);
1004
1005         if (rc == 0) {
1006                 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1007                 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1008         } else {
1009                 struct ieee80211_qos_parameter_info param_element;
1010
1011                 rc = ieee80211_read_qos_param_element(&param_element,
1012                                                       info_element);
1013                 if (rc == 0) {
1014                         qos_param = &(network->qos_data.parameters);
1015                         ieee80211_qos_convert_ac_to_parameters(&param_element,
1016                                                                qos_param);
1017                         network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1018                         network->qos_data.param_count =
1019                             param_element.info_element.ac_info & 0x0F;
1020                 }
1021         }
1022
1023         if (rc == 0) {
1024                 IEEE80211_DEBUG_QOS("QoS is supported\n");
1025                 network->qos_data.supported = 1;
1026         }
1027         return rc;
1028 }
1029
1030 #ifdef CONFIG_IEEE80211_DEBUG
1031 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1032
1033 static const char *get_info_element_string(u16 id)
1034 {
1035         switch (id) {
1036                 MFIE_STRING(SSID);
1037                 MFIE_STRING(RATES);
1038                 MFIE_STRING(FH_SET);
1039                 MFIE_STRING(DS_SET);
1040                 MFIE_STRING(CF_SET);
1041                 MFIE_STRING(TIM);
1042                 MFIE_STRING(IBSS_SET);
1043                 MFIE_STRING(COUNTRY);
1044                 MFIE_STRING(HOP_PARAMS);
1045                 MFIE_STRING(HOP_TABLE);
1046                 MFIE_STRING(REQUEST);
1047                 MFIE_STRING(CHALLENGE);
1048                 MFIE_STRING(POWER_CONSTRAINT);
1049                 MFIE_STRING(POWER_CAPABILITY);
1050                 MFIE_STRING(TPC_REQUEST);
1051                 MFIE_STRING(TPC_REPORT);
1052                 MFIE_STRING(SUPP_CHANNELS);
1053                 MFIE_STRING(CSA);
1054                 MFIE_STRING(MEASURE_REQUEST);
1055                 MFIE_STRING(MEASURE_REPORT);
1056                 MFIE_STRING(QUIET);
1057                 MFIE_STRING(IBSS_DFS);
1058                 MFIE_STRING(ERP_INFO);
1059                 MFIE_STRING(RSN);
1060                 MFIE_STRING(RATES_EX);
1061                 MFIE_STRING(GENERIC);
1062                 MFIE_STRING(QOS_PARAMETER);
1063         default:
1064                 return "UNKNOWN";
1065         }
1066 }
1067 #endif
1068
1069 static int ieee80211_parse_info_param(struct ieee80211_info_element
1070                                       *info_element, u16 length,
1071                                       struct ieee80211_network *network)
1072 {
1073         u8 i;
1074 #ifdef CONFIG_IEEE80211_DEBUG
1075         char rates_str[64];
1076         char *p;
1077 #endif
1078
1079         while (length >= sizeof(*info_element)) {
1080                 if (sizeof(*info_element) + info_element->len > length) {
1081                         IEEE80211_ERROR("Info elem: parse failed: "
1082                                         "info_element->len + 2 > left : "
1083                                         "info_element->len+2=%zd left=%d, id=%d.\n",
1084                                         info_element->len +
1085                                         sizeof(*info_element),
1086                                         length, info_element->id);
1087                         /* We stop processing but don't return an error here
1088                          * because some misbehaviour APs break this rule. ie.
1089                          * Orinoco AP1000. */
1090                         break;
1091                 }
1092
1093                 switch (info_element->id) {
1094                 case MFIE_TYPE_SSID:
1095                         if (ieee80211_is_empty_essid(info_element->data,
1096                                                      info_element->len)) {
1097                                 network->flags |= NETWORK_EMPTY_ESSID;
1098                                 break;
1099                         }
1100
1101                         network->ssid_len = min(info_element->len,
1102                                                 (u8) IW_ESSID_MAX_SIZE);
1103                         memcpy(network->ssid, info_element->data,
1104                                network->ssid_len);
1105                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
1106                                 memset(network->ssid + network->ssid_len, 0,
1107                                        IW_ESSID_MAX_SIZE - network->ssid_len);
1108
1109                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1110                                              network->ssid, network->ssid_len);
1111                         break;
1112
1113                 case MFIE_TYPE_RATES:
1114 #ifdef CONFIG_IEEE80211_DEBUG
1115                         p = rates_str;
1116 #endif
1117                         network->rates_len = min(info_element->len,
1118                                                  MAX_RATES_LENGTH);
1119                         for (i = 0; i < network->rates_len; i++) {
1120                                 network->rates[i] = info_element->data[i];
1121 #ifdef CONFIG_IEEE80211_DEBUG
1122                                 p += snprintf(p, sizeof(rates_str) -
1123                                               (p - rates_str), "%02X ",
1124                                               network->rates[i]);
1125 #endif
1126                                 if (ieee80211_is_ofdm_rate
1127                                     (info_element->data[i])) {
1128                                         network->flags |= NETWORK_HAS_OFDM;
1129                                         if (info_element->data[i] &
1130                                             IEEE80211_BASIC_RATE_MASK)
1131                                                 network->flags &=
1132                                                     ~NETWORK_HAS_CCK;
1133                                 }
1134                         }
1135
1136                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1137                                              rates_str, network->rates_len);
1138                         break;
1139
1140                 case MFIE_TYPE_RATES_EX:
1141 #ifdef CONFIG_IEEE80211_DEBUG
1142                         p = rates_str;
1143 #endif
1144                         network->rates_ex_len = min(info_element->len,
1145                                                     MAX_RATES_EX_LENGTH);
1146                         for (i = 0; i < network->rates_ex_len; i++) {
1147                                 network->rates_ex[i] = info_element->data[i];
1148 #ifdef CONFIG_IEEE80211_DEBUG
1149                                 p += snprintf(p, sizeof(rates_str) -
1150                                               (p - rates_str), "%02X ",
1151                                               network->rates[i]);
1152 #endif
1153                                 if (ieee80211_is_ofdm_rate
1154                                     (info_element->data[i])) {
1155                                         network->flags |= NETWORK_HAS_OFDM;
1156                                         if (info_element->data[i] &
1157                                             IEEE80211_BASIC_RATE_MASK)
1158                                                 network->flags &=
1159                                                     ~NETWORK_HAS_CCK;
1160                                 }
1161                         }
1162
1163                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1164                                              rates_str, network->rates_ex_len);
1165                         break;
1166
1167                 case MFIE_TYPE_DS_SET:
1168                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1169                                              info_element->data[0]);
1170                         network->channel = info_element->data[0];
1171                         break;
1172
1173                 case MFIE_TYPE_FH_SET:
1174                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1175                         break;
1176
1177                 case MFIE_TYPE_CF_SET:
1178                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1179                         break;
1180
1181                 case MFIE_TYPE_TIM:
1182                         network->tim.tim_count = info_element->data[0];
1183                         network->tim.tim_period = info_element->data[1];
1184                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
1185                         break;
1186
1187                 case MFIE_TYPE_ERP_INFO:
1188                         network->erp_value = info_element->data[0];
1189                         network->flags |= NETWORK_HAS_ERP_VALUE;
1190                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1191                                              network->erp_value);
1192                         break;
1193
1194                 case MFIE_TYPE_IBSS_SET:
1195                         network->atim_window = info_element->data[0];
1196                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1197                                              network->atim_window);
1198                         break;
1199
1200                 case MFIE_TYPE_CHALLENGE:
1201                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1202                         break;
1203
1204                 case MFIE_TYPE_GENERIC:
1205                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1206                                              info_element->len);
1207                         if (!ieee80211_parse_qos_info_param_IE(info_element,
1208                                                                network))
1209                                 break;
1210
1211                         if (info_element->len >= 4 &&
1212                             info_element->data[0] == 0x00 &&
1213                             info_element->data[1] == 0x50 &&
1214                             info_element->data[2] == 0xf2 &&
1215                             info_element->data[3] == 0x01) {
1216                                 network->wpa_ie_len = min(info_element->len + 2,
1217                                                           MAX_WPA_IE_LEN);
1218                                 memcpy(network->wpa_ie, info_element,
1219                                        network->wpa_ie_len);
1220                         }
1221                         break;
1222
1223                 case MFIE_TYPE_RSN:
1224                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
1225                                              info_element->len);
1226                         network->rsn_ie_len = min(info_element->len + 2,
1227                                                   MAX_WPA_IE_LEN);
1228                         memcpy(network->rsn_ie, info_element,
1229                                network->rsn_ie_len);
1230                         break;
1231
1232                 case MFIE_TYPE_QOS_PARAMETER:
1233                         printk(KERN_ERR
1234                                "QoS Error need to parse QOS_PARAMETER IE\n");
1235                         break;
1236                         /* 802.11h */
1237                 case MFIE_TYPE_POWER_CONSTRAINT:
1238                         network->power_constraint = info_element->data[0];
1239                         network->flags |= NETWORK_HAS_POWER_CONSTRAINT;
1240                         break;
1241
1242                 case MFIE_TYPE_CSA:
1243                         network->power_constraint = info_element->data[0];
1244                         network->flags |= NETWORK_HAS_CSA;
1245                         break;
1246
1247                 case MFIE_TYPE_QUIET:
1248                         network->quiet.count = info_element->data[0];
1249                         network->quiet.period = info_element->data[1];
1250                         network->quiet.duration = info_element->data[2];
1251                         network->quiet.offset = info_element->data[3];
1252                         network->flags |= NETWORK_HAS_QUIET;
1253                         break;
1254
1255                 case MFIE_TYPE_IBSS_DFS:
1256                         if (network->ibss_dfs)
1257                                 break;
1258                         network->ibss_dfs =
1259                             kmalloc(info_element->len, GFP_ATOMIC);
1260                         if (!network->ibss_dfs)
1261                                 return 1;
1262                         memcpy(network->ibss_dfs, info_element->data,
1263                                info_element->len);
1264                         network->flags |= NETWORK_HAS_IBSS_DFS;
1265                         break;
1266
1267                 case MFIE_TYPE_TPC_REPORT:
1268                         network->tpc_report.transmit_power =
1269                             info_element->data[0];
1270                         network->tpc_report.link_margin = info_element->data[1];
1271                         network->flags |= NETWORK_HAS_TPC_REPORT;
1272                         break;
1273
1274                 default:
1275                         IEEE80211_DEBUG_MGMT
1276                             ("Unsupported info element: %s (%d)\n",
1277                              get_info_element_string(info_element->id),
1278                              info_element->id);
1279                         break;
1280                 }
1281
1282                 length -= sizeof(*info_element) + info_element->len;
1283                 info_element =
1284                     (struct ieee80211_info_element *)&info_element->
1285                     data[info_element->len];
1286         }
1287
1288         return 0;
1289 }
1290
1291 static int ieee80211_handle_assoc_resp(struct ieee80211_device *ieee, struct ieee80211_assoc_response
1292                                        *frame, struct ieee80211_rx_stats *stats)
1293 {
1294         struct ieee80211_network network_resp = {
1295                 .ibss_dfs = NULL,
1296         };
1297         struct ieee80211_network *network = &network_resp;
1298         struct net_device *dev = ieee->dev;
1299
1300         network->flags = 0;
1301         network->qos_data.active = 0;
1302         network->qos_data.supported = 0;
1303         network->qos_data.param_count = 0;
1304         network->qos_data.old_param_count = 0;
1305
1306         //network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF);
1307         network->atim_window = le16_to_cpu(frame->aid);
1308         network->listen_interval = le16_to_cpu(frame->status);
1309         memcpy(network->bssid, frame->header.addr3, ETH_ALEN);
1310         network->capability = le16_to_cpu(frame->capability);
1311         network->last_scanned = jiffies;
1312         network->rates_len = network->rates_ex_len = 0;
1313         network->last_associate = 0;
1314         network->ssid_len = 0;
1315         network->erp_value =
1316             (network->capability & WLAN_CAPABILITY_IBSS) ? 0x3 : 0x0;
1317
1318         if (stats->freq == IEEE80211_52GHZ_BAND) {
1319                 /* for A band (No DS info) */
1320                 network->channel = stats->received_channel;
1321         } else
1322                 network->flags |= NETWORK_HAS_CCK;
1323
1324         network->wpa_ie_len = 0;
1325         network->rsn_ie_len = 0;
1326
1327         if (ieee80211_parse_info_param
1328             (frame->info_element, stats->len - sizeof(*frame), network))
1329                 return 1;
1330
1331         network->mode = 0;
1332         if (stats->freq == IEEE80211_52GHZ_BAND)
1333                 network->mode = IEEE_A;
1334         else {
1335                 if (network->flags & NETWORK_HAS_OFDM)
1336                         network->mode |= IEEE_G;
1337                 if (network->flags & NETWORK_HAS_CCK)
1338                         network->mode |= IEEE_B;
1339         }
1340
1341         if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
1342                 network->flags |= NETWORK_EMPTY_ESSID;
1343
1344         memcpy(&network->stats, stats, sizeof(network->stats));
1345
1346         if (ieee->handle_assoc_response != NULL)
1347                 ieee->handle_assoc_response(dev, frame, network);
1348
1349         return 0;
1350 }
1351
1352 /***************************************************/
1353
1354 static int ieee80211_network_init(struct ieee80211_device *ieee, struct ieee80211_probe_response
1355                                          *beacon,
1356                                          struct ieee80211_network *network,
1357                                          struct ieee80211_rx_stats *stats)
1358 {
1359         network->qos_data.active = 0;
1360         network->qos_data.supported = 0;
1361         network->qos_data.param_count = 0;
1362         network->qos_data.old_param_count = 0;
1363
1364         /* Pull out fixed field data */
1365         memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
1366         network->capability = le16_to_cpu(beacon->capability);
1367         network->last_scanned = jiffies;
1368         network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
1369         network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
1370         network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
1371         /* Where to pull this? beacon->listen_interval; */
1372         network->listen_interval = 0x0A;
1373         network->rates_len = network->rates_ex_len = 0;
1374         network->last_associate = 0;
1375         network->ssid_len = 0;
1376         network->flags = 0;
1377         network->atim_window = 0;
1378         network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
1379             0x3 : 0x0;
1380
1381         if (stats->freq == IEEE80211_52GHZ_BAND) {
1382                 /* for A band (No DS info) */
1383                 network->channel = stats->received_channel;
1384         } else
1385                 network->flags |= NETWORK_HAS_CCK;
1386
1387         network->wpa_ie_len = 0;
1388         network->rsn_ie_len = 0;
1389
1390         if (ieee80211_parse_info_param
1391             (beacon->info_element, stats->len - sizeof(*beacon), network))
1392                 return 1;
1393
1394         network->mode = 0;
1395         if (stats->freq == IEEE80211_52GHZ_BAND)
1396                 network->mode = IEEE_A;
1397         else {
1398                 if (network->flags & NETWORK_HAS_OFDM)
1399                         network->mode |= IEEE_G;
1400                 if (network->flags & NETWORK_HAS_CCK)
1401                         network->mode |= IEEE_B;
1402         }
1403
1404         if (network->mode == 0) {
1405                 IEEE80211_DEBUG_SCAN("Filtered out '%s (" MAC_FMT ")' "
1406                                      "network.\n",
1407                                      escape_essid(network->ssid,
1408                                                   network->ssid_len),
1409                                      MAC_ARG(network->bssid));
1410                 return 1;
1411         }
1412
1413         if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
1414                 network->flags |= NETWORK_EMPTY_ESSID;
1415
1416         memcpy(&network->stats, stats, sizeof(network->stats));
1417
1418         return 0;
1419 }
1420
1421 static inline int is_same_network(struct ieee80211_network *src,
1422                                   struct ieee80211_network *dst)
1423 {
1424         /* A network is only a duplicate if the channel, BSSID, and ESSID
1425          * all match.  We treat all <hidden> with the same BSSID and channel
1426          * as one network */
1427         return ((src->ssid_len == dst->ssid_len) &&
1428                 (src->channel == dst->channel) &&
1429                 !compare_ether_addr(src->bssid, dst->bssid) &&
1430                 !memcmp(src->ssid, dst->ssid, src->ssid_len));
1431 }
1432
1433 static void update_network(struct ieee80211_network *dst,
1434                                   struct ieee80211_network *src)
1435 {
1436         int qos_active;
1437         u8 old_param;
1438
1439         ieee80211_network_reset(dst);
1440         dst->ibss_dfs = src->ibss_dfs;
1441
1442         /* We only update the statistics if they were created by receiving
1443          * the network information on the actual channel the network is on.
1444          *
1445          * This keeps beacons received on neighbor channels from bringing
1446          * down the signal level of an AP. */
1447         if (dst->channel == src->stats.received_channel)
1448                 memcpy(&dst->stats, &src->stats,
1449                        sizeof(struct ieee80211_rx_stats));
1450         else
1451                 IEEE80211_DEBUG_SCAN("Network " MAC_FMT " info received "
1452                         "off channel (%d vs. %d)\n", MAC_ARG(src->bssid),
1453                         dst->channel, src->stats.received_channel);
1454
1455         dst->capability = src->capability;
1456         memcpy(dst->rates, src->rates, src->rates_len);
1457         dst->rates_len = src->rates_len;
1458         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
1459         dst->rates_ex_len = src->rates_ex_len;
1460
1461         dst->mode = src->mode;
1462         dst->flags = src->flags;
1463         dst->time_stamp[0] = src->time_stamp[0];
1464         dst->time_stamp[1] = src->time_stamp[1];
1465
1466         dst->beacon_interval = src->beacon_interval;
1467         dst->listen_interval = src->listen_interval;
1468         dst->atim_window = src->atim_window;
1469         dst->erp_value = src->erp_value;
1470         dst->tim = src->tim;
1471
1472         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
1473         dst->wpa_ie_len = src->wpa_ie_len;
1474         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
1475         dst->rsn_ie_len = src->rsn_ie_len;
1476
1477         dst->last_scanned = jiffies;
1478         qos_active = src->qos_data.active;
1479         old_param = dst->qos_data.old_param_count;
1480         if (dst->flags & NETWORK_HAS_QOS_MASK)
1481                 memcpy(&dst->qos_data, &src->qos_data,
1482                        sizeof(struct ieee80211_qos_data));
1483         else {
1484                 dst->qos_data.supported = src->qos_data.supported;
1485                 dst->qos_data.param_count = src->qos_data.param_count;
1486         }
1487
1488         if (dst->qos_data.supported == 1) {
1489                 if (dst->ssid_len)
1490                         IEEE80211_DEBUG_QOS
1491                             ("QoS the network %s is QoS supported\n",
1492                              dst->ssid);
1493                 else
1494                         IEEE80211_DEBUG_QOS
1495                             ("QoS the network is QoS supported\n");
1496         }
1497         dst->qos_data.active = qos_active;
1498         dst->qos_data.old_param_count = old_param;
1499
1500         /* dst->last_associate is not overwritten */
1501 }
1502
1503 static inline int is_beacon(__le16 fc)
1504 {
1505         return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
1506 }
1507
1508 static void ieee80211_process_probe_response(struct ieee80211_device
1509                                                     *ieee, struct
1510                                                     ieee80211_probe_response
1511                                                     *beacon, struct ieee80211_rx_stats
1512                                                     *stats)
1513 {
1514         struct net_device *dev = ieee->dev;
1515         struct ieee80211_network network = {
1516                 .ibss_dfs = NULL,
1517         };
1518         struct ieee80211_network *target;
1519         struct ieee80211_network *oldest = NULL;
1520 #ifdef CONFIG_IEEE80211_DEBUG
1521         struct ieee80211_info_element *info_element = beacon->info_element;
1522 #endif
1523         unsigned long flags;
1524
1525         IEEE80211_DEBUG_SCAN("'%s' (" MAC_FMT
1526                              "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1527                              escape_essid(info_element->data,
1528                                           info_element->len),
1529                              MAC_ARG(beacon->header.addr3),
1530                              (beacon->capability & (1 << 0xf)) ? '1' : '0',
1531                              (beacon->capability & (1 << 0xe)) ? '1' : '0',
1532                              (beacon->capability & (1 << 0xd)) ? '1' : '0',
1533                              (beacon->capability & (1 << 0xc)) ? '1' : '0',
1534                              (beacon->capability & (1 << 0xb)) ? '1' : '0',
1535                              (beacon->capability & (1 << 0xa)) ? '1' : '0',
1536                              (beacon->capability & (1 << 0x9)) ? '1' : '0',
1537                              (beacon->capability & (1 << 0x8)) ? '1' : '0',
1538                              (beacon->capability & (1 << 0x7)) ? '1' : '0',
1539                              (beacon->capability & (1 << 0x6)) ? '1' : '0',
1540                              (beacon->capability & (1 << 0x5)) ? '1' : '0',
1541                              (beacon->capability & (1 << 0x4)) ? '1' : '0',
1542                              (beacon->capability & (1 << 0x3)) ? '1' : '0',
1543                              (beacon->capability & (1 << 0x2)) ? '1' : '0',
1544                              (beacon->capability & (1 << 0x1)) ? '1' : '0',
1545                              (beacon->capability & (1 << 0x0)) ? '1' : '0');
1546
1547         if (ieee80211_network_init(ieee, beacon, &network, stats)) {
1548                 IEEE80211_DEBUG_SCAN("Dropped '%s' (" MAC_FMT ") via %s.\n",
1549                                      escape_essid(info_element->data,
1550                                                   info_element->len),
1551                                      MAC_ARG(beacon->header.addr3),
1552                                      is_beacon(beacon->header.frame_ctl) ?
1553                                      "BEACON" : "PROBE RESPONSE");
1554                 return;
1555         }
1556
1557         /* The network parsed correctly -- so now we scan our known networks
1558          * to see if we can find it in our list.
1559          *
1560          * NOTE:  This search is definitely not optimized.  Once its doing
1561          *        the "right thing" we'll optimize it for efficiency if
1562          *        necessary */
1563
1564         /* Search for this entry in the list and update it if it is
1565          * already there. */
1566
1567         spin_lock_irqsave(&ieee->lock, flags);
1568
1569         list_for_each_entry(target, &ieee->network_list, list) {
1570                 if (is_same_network(target, &network))
1571                         break;
1572
1573                 if ((oldest == NULL) ||
1574                     (target->last_scanned < oldest->last_scanned))
1575                         oldest = target;
1576         }
1577
1578         /* If we didn't find a match, then get a new network slot to initialize
1579          * with this beacon's information */
1580         if (&target->list == &ieee->network_list) {
1581                 if (list_empty(&ieee->network_free_list)) {
1582                         /* If there are no more slots, expire the oldest */
1583                         list_del(&oldest->list);
1584                         target = oldest;
1585                         IEEE80211_DEBUG_SCAN("Expired '%s' (" MAC_FMT ") from "
1586                                              "network list.\n",
1587                                              escape_essid(target->ssid,
1588                                                           target->ssid_len),
1589                                              MAC_ARG(target->bssid));
1590                         ieee80211_network_reset(target);
1591                 } else {
1592                         /* Otherwise just pull from the free list */
1593                         target = list_entry(ieee->network_free_list.next,
1594                                             struct ieee80211_network, list);
1595                         list_del(ieee->network_free_list.next);
1596                 }
1597
1598 #ifdef CONFIG_IEEE80211_DEBUG
1599                 IEEE80211_DEBUG_SCAN("Adding '%s' (" MAC_FMT ") via %s.\n",
1600                                      escape_essid(network.ssid,
1601                                                   network.ssid_len),
1602                                      MAC_ARG(network.bssid),
1603                                      is_beacon(beacon->header.frame_ctl) ?
1604                                      "BEACON" : "PROBE RESPONSE");
1605 #endif
1606                 memcpy(target, &network, sizeof(*target));
1607                 network.ibss_dfs = NULL;
1608                 list_add_tail(&target->list, &ieee->network_list);
1609         } else {
1610                 IEEE80211_DEBUG_SCAN("Updating '%s' (" MAC_FMT ") via %s.\n",
1611                                      escape_essid(target->ssid,
1612                                                   target->ssid_len),
1613                                      MAC_ARG(target->bssid),
1614                                      is_beacon(beacon->header.frame_ctl) ?
1615                                      "BEACON" : "PROBE RESPONSE");
1616                 update_network(target, &network);
1617                 network.ibss_dfs = NULL;
1618         }
1619
1620         spin_unlock_irqrestore(&ieee->lock, flags);
1621
1622         if (is_beacon(beacon->header.frame_ctl)) {
1623                 if (ieee->handle_beacon != NULL)
1624                         ieee->handle_beacon(dev, beacon, target);
1625         } else {
1626                 if (ieee->handle_probe_response != NULL)
1627                         ieee->handle_probe_response(dev, beacon, target);
1628         }
1629 }
1630
1631 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
1632                       struct ieee80211_hdr_4addr *header,
1633                       struct ieee80211_rx_stats *stats)
1634 {
1635         switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
1636         case IEEE80211_STYPE_ASSOC_RESP:
1637                 IEEE80211_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
1638                                      WLAN_FC_GET_STYPE(le16_to_cpu
1639                                                        (header->frame_ctl)));
1640                 ieee80211_handle_assoc_resp(ieee,
1641                                             (struct ieee80211_assoc_response *)
1642                                             header, stats);
1643                 break;
1644
1645         case IEEE80211_STYPE_REASSOC_RESP:
1646                 IEEE80211_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
1647                                      WLAN_FC_GET_STYPE(le16_to_cpu
1648                                                        (header->frame_ctl)));
1649                 break;
1650
1651         case IEEE80211_STYPE_PROBE_REQ:
1652                 IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1653                                      WLAN_FC_GET_STYPE(le16_to_cpu
1654                                                        (header->frame_ctl)));
1655
1656                 if (ieee->handle_probe_request != NULL)
1657                         ieee->handle_probe_request(ieee->dev,
1658                                                    (struct
1659                                                     ieee80211_probe_request *)
1660                                                    header, stats);
1661                 break;
1662
1663         case IEEE80211_STYPE_PROBE_RESP:
1664                 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1665                                      WLAN_FC_GET_STYPE(le16_to_cpu
1666                                                        (header->frame_ctl)));
1667                 IEEE80211_DEBUG_SCAN("Probe response\n");
1668                 ieee80211_process_probe_response(ieee,
1669                                                  (struct
1670                                                   ieee80211_probe_response *)
1671                                                  header, stats);
1672                 break;
1673
1674         case IEEE80211_STYPE_BEACON:
1675                 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
1676                                      WLAN_FC_GET_STYPE(le16_to_cpu
1677                                                        (header->frame_ctl)));
1678                 IEEE80211_DEBUG_SCAN("Beacon\n");
1679                 ieee80211_process_probe_response(ieee,
1680                                                  (struct
1681                                                   ieee80211_probe_response *)
1682                                                  header, stats);
1683                 break;
1684         case IEEE80211_STYPE_AUTH:
1685
1686                 IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1687                                      WLAN_FC_GET_STYPE(le16_to_cpu
1688                                                        (header->frame_ctl)));
1689
1690                 if (ieee->handle_auth != NULL)
1691                         ieee->handle_auth(ieee->dev,
1692                                           (struct ieee80211_auth *)header);
1693                 break;
1694
1695         case IEEE80211_STYPE_DISASSOC:
1696                 if (ieee->handle_disassoc != NULL)
1697                         ieee->handle_disassoc(ieee->dev,
1698                                               (struct ieee80211_disassoc *)
1699                                               header);
1700                 break;
1701
1702         case IEEE80211_STYPE_ACTION:
1703                 IEEE80211_DEBUG_MGMT("ACTION\n");
1704                 if (ieee->handle_action)
1705                         ieee->handle_action(ieee->dev,
1706                                             (struct ieee80211_action *)
1707                                             header, stats);
1708                 break;
1709
1710         case IEEE80211_STYPE_REASSOC_REQ:
1711                 IEEE80211_DEBUG_MGMT("received reassoc (%d)\n",
1712                                      WLAN_FC_GET_STYPE(le16_to_cpu
1713                                                        (header->frame_ctl)));
1714
1715                 IEEE80211_DEBUG_MGMT("%s: IEEE80211_REASSOC_REQ received\n",
1716                                      ieee->dev->name);
1717                 if (ieee->handle_reassoc_request != NULL)
1718                         ieee->handle_reassoc_request(ieee->dev,
1719                                                     (struct ieee80211_reassoc_request *)
1720                                                      header);
1721                 break;
1722
1723         case IEEE80211_STYPE_ASSOC_REQ:
1724                 IEEE80211_DEBUG_MGMT("received assoc (%d)\n",
1725                                      WLAN_FC_GET_STYPE(le16_to_cpu
1726                                                        (header->frame_ctl)));
1727
1728                 IEEE80211_DEBUG_MGMT("%s: IEEE80211_ASSOC_REQ received\n",
1729                                      ieee->dev->name);
1730                 if (ieee->handle_assoc_request != NULL)
1731                         ieee->handle_assoc_request(ieee->dev);
1732                 break;
1733
1734         case IEEE80211_STYPE_DEAUTH:
1735                 IEEE80211_DEBUG_MGMT("DEAUTH\n");
1736                 if (ieee->handle_deauth != NULL)
1737                         ieee->handle_deauth(ieee->dev,
1738                                             (struct ieee80211_deauth *)
1739                                             header);
1740                 break;
1741         default:
1742                 IEEE80211_DEBUG_MGMT("received UNKNOWN (%d)\n",
1743                                      WLAN_FC_GET_STYPE(le16_to_cpu
1744                                                        (header->frame_ctl)));
1745                 IEEE80211_DEBUG_MGMT("%s: Unknown management packet: %d\n",
1746                                      ieee->dev->name,
1747                                      WLAN_FC_GET_STYPE(le16_to_cpu
1748                                                        (header->frame_ctl)));
1749                 break;
1750         }
1751 }
1752
1753 EXPORT_SYMBOL_GPL(ieee80211_rx_any);
1754 EXPORT_SYMBOL(ieee80211_rx_mgt);
1755 EXPORT_SYMBOL(ieee80211_rx);