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 int ieee80211_rx_any(struct ieee80211_device *ieee,
 784                      struct sk_buff *skb, struct ieee80211_rx_stats *stats)
 785 {
 786         struct ieee80211_hdr_4addr *hdr;
 787         int is_packet_for_us;
 788         u16 fc;
 789
 790         if (ieee->iw_mode == IW_MODE_MONITOR)
 791                 return ieee80211_rx(ieee, skb, stats) ? 0 : -EINVAL;
 792
 793         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 794         fc = le16_to_cpu(hdr->frame_ctl);
 795
 796         if ((fc & IEEE80211_FCTL_VERS) != 0)
 797                 return -EINVAL;
 798
 799         switch (fc & IEEE80211_FCTL_FTYPE) {
 800         case IEEE80211_FTYPE_MGMT:
 801                 ieee80211_rx_mgt(ieee, hdr, stats);
 802                 return 0;
 803         case IEEE80211_FTYPE_DATA:
 804                 break;
 805         case IEEE80211_FTYPE_CTL:
 806                 return 0;
 807         default:
 808                 return -EINVAL;
 809         }
 810
 811         is_packet_for_us = 0;
 812         switch (ieee->iw_mode) {
 813         case IW_MODE_ADHOC:
 814                 /* our BSS and not from/to DS */
 815                 if (memcmp(hdr->addr3, ieee->bssid, ETH_ALEN) == 0)
 816                 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == 0) {
 817                         /* promisc: get all */
 818                         if (ieee->dev->flags & IFF_PROMISC)
 819                                 is_packet_for_us = 1;
 820                         /* to us */
 821                         else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
 822                                 is_packet_for_us = 1;
 823                         /* mcast */
 824                         else if (is_multicast_ether_addr(hdr->addr1))
 825                                 is_packet_for_us = 1;
 826                 }
 827                 break;
 828         case IW_MODE_INFRA:
 829                 /* our BSS (== from our AP) and from DS */
 830                 if (memcmp(hdr->addr2, ieee->bssid, ETH_ALEN) == 0)
 831                 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS) {
 832                         /* promisc: get all */
 833                         if (ieee->dev->flags & IFF_PROMISC)
 834                                 is_packet_for_us = 1;
 835                         /* to us */
 836                         else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
 837                                 is_packet_for_us = 1;
 838                         /* mcast */
 839                         else if (is_multicast_ether_addr(hdr->addr1)) {
 840                                 /* not our own packet bcasted from AP */
 841                                 if (memcmp(hdr->addr3, ieee->dev->dev_addr, ETH_ALEN))
 842                                         is_packet_for_us = 1;
 843                         }
 844                 }
 845                 break;
 846         default:
 847                 /* ? */
 848                 break;
 849         }
 850
 851         if (is_packet_for_us)
 852                 return (ieee80211_rx(ieee, skb, stats) ? 0 : -EINVAL);
 853         return 0;
 854 }
 855
 856 #define MGMT_FRAME_FIXED_PART_LENGTH            0x24
 857
 858 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
 859
 860 /*
 861 * Make ther structure we read from the beacon packet has
 862 * the right values
 863 */
 864 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
 865                                      *info_element, int sub_type)
 866 {
 867
 868         if (info_element->qui_subtype != sub_type)
 869                 return -1;
 870         if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
 871                 return -1;
 872         if (info_element->qui_type != QOS_OUI_TYPE)
 873                 return -1;
 874         if (info_element->version != QOS_VERSION_1)
 875                 return -1;
 876
 877         return 0;
 878 }
 879
 880 /*
 881  * Parse a QoS parameter element
 882  */
 883 static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
 884                                             *element_param, struct ieee80211_info_element
 885                                             *info_element)
 886 {
 887         int ret = 0;
 888         u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2;
 889
 890         if ((info_element == NULL) || (element_param == NULL))
 891                 return -1;
 892
 893         if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
 894                 memcpy(element_param->info_element.qui, info_element->data,
 895                        info_element->len);
 896                 element_param->info_element.elementID = info_element->id;
 897                 element_param->info_element.length = info_element->len;
 898         } else
 899                 ret = -1;
 900         if (ret == 0)
 901                 ret = ieee80211_verify_qos_info(&element_param->info_element,
 902                                                 QOS_OUI_PARAM_SUB_TYPE);
 903         return ret;
 904 }
 905
 906 /*
 907  * Parse a QoS information element
 908  */
 909 static int ieee80211_read_qos_info_element(struct
 910                                            ieee80211_qos_information_element
 911                                            *element_info, struct ieee80211_info_element
 912                                            *info_element)
 913 {
 914         int ret = 0;
 915         u16 size = sizeof(struct ieee80211_qos_information_element) - 2;
 916
 917         if (element_info == NULL)
 918                 return -1;
 919         if (info_element == NULL)
 920                 return -1;
 921
 922         if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
 923                 memcpy(element_info->qui, info_element->data,
 924                        info_element->len);
 925                 element_info->elementID = info_element->id;
 926                 element_info->length = info_element->len;
 927         } else
 928                 ret = -1;
 929
 930         if (ret == 0)
 931                 ret = ieee80211_verify_qos_info(element_info,
 932                                                 QOS_OUI_INFO_SUB_TYPE);
 933         return ret;
 934 }
 935
 936 /*
 937  * Write QoS parameters from the ac parameters.
 938  */
 939 static int ieee80211_qos_convert_ac_to_parameters(struct
 940                                                   ieee80211_qos_parameter_info
 941                                                   *param_elm, struct
 942                                                   ieee80211_qos_parameters
 943                                                   *qos_param)
 944 {
 945         int rc = 0;
 946         int i;
 947         struct ieee80211_qos_ac_parameter *ac_params;
 948         u32 txop;
 949         u8 cw_min;
 950         u8 cw_max;
 951
 952         for (i = 0; i < QOS_QUEUE_NUM; i++) {
 953                 ac_params = &(param_elm->ac_params_record[i]);
 954
 955                 qos_param->aifs[i] = (ac_params->aci_aifsn) & 0x0F;
 956                 qos_param->aifs[i] -= (qos_param->aifs[i] < 2) ? 0 : 2;
 957
 958                 cw_min = ac_params->ecw_min_max & 0x0F;
 959                 qos_param->cw_min[i] = (u16) ((1 << cw_min) - 1);
 960
 961                 cw_max = (ac_params->ecw_min_max & 0xF0) >> 4;
 962                 qos_param->cw_max[i] = (u16) ((1 << cw_max) - 1);
 963
 964                 qos_param->flag[i] =
 965                     (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
 966
 967                 txop = le16_to_cpu(ac_params->tx_op_limit) * 32;
 968                 qos_param->tx_op_limit[i] = (u16) txop;
 969         }
 970         return rc;
 971 }
 972
 973 /*
 974  * we have a generic data element which it may contain QoS information or
 975  * parameters element. check the information element length to decide
 976  * which type to read
 977  */
 978 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
 979                                              *info_element,
 980                                              struct ieee80211_network *network)
 981 {
 982         int rc = 0;
 983         struct ieee80211_qos_parameters *qos_param = NULL;
 984         struct ieee80211_qos_information_element qos_info_element;
 985
 986         rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);
 987
 988         if (rc == 0) {
 989                 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
 990                 network->flags |= NETWORK_HAS_QOS_INFORMATION;
 991         } else {
 992                 struct ieee80211_qos_parameter_info param_element;
 993
 994                 rc = ieee80211_read_qos_param_element(&param_element,
 995                                                       info_element);
 996                 if (rc == 0) {
 997                         qos_param = &(network->qos_data.parameters);
 998                         ieee80211_qos_convert_ac_to_parameters(&param_element,
 999                                                                qos_param);
1000                         network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1001                         network->qos_data.param_count =
1002                             param_element.info_element.ac_info & 0x0F;
1003                 }
1004         }
1005
1006         if (rc == 0) {
1007                 IEEE80211_DEBUG_QOS("QoS is supported\n");
1008                 network->qos_data.supported = 1;
1009         }
1010         return rc;
1011 }
1012
1013 #ifdef CONFIG_IEEE80211_DEBUG
1014 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1015
1016 static const char *get_info_element_string(u16 id)
1017 {
1018         switch (id) {
1019                 MFIE_STRING(SSID);
1020                 MFIE_STRING(RATES);
1021                 MFIE_STRING(FH_SET);
1022                 MFIE_STRING(DS_SET);
1023                 MFIE_STRING(CF_SET);
1024                 MFIE_STRING(TIM);
1025                 MFIE_STRING(IBSS_SET);
1026                 MFIE_STRING(COUNTRY);
1027                 MFIE_STRING(HOP_PARAMS);
1028                 MFIE_STRING(HOP_TABLE);
1029                 MFIE_STRING(REQUEST);
1030                 MFIE_STRING(CHALLENGE);
1031                 MFIE_STRING(POWER_CONSTRAINT);
1032                 MFIE_STRING(POWER_CAPABILITY);
1033                 MFIE_STRING(TPC_REQUEST);
1034                 MFIE_STRING(TPC_REPORT);
1035                 MFIE_STRING(SUPP_CHANNELS);
1036                 MFIE_STRING(CSA);
1037                 MFIE_STRING(MEASURE_REQUEST);
1038                 MFIE_STRING(MEASURE_REPORT);
1039                 MFIE_STRING(QUIET);
1040                 MFIE_STRING(IBSS_DFS);
1041                 MFIE_STRING(ERP_INFO);
1042                 MFIE_STRING(RSN);
1043                 MFIE_STRING(RATES_EX);
1044                 MFIE_STRING(GENERIC);
1045                 MFIE_STRING(QOS_PARAMETER);
1046         default:
1047                 return "UNKNOWN";
1048         }
1049 }
1050 #endif
1051
1052 static int ieee80211_parse_info_param(struct ieee80211_info_element
1053                                       *info_element, u16 length,
1054                                       struct ieee80211_network *network)
1055 {
1056         u8 i;
1057 #ifdef CONFIG_IEEE80211_DEBUG
1058         char rates_str[64];
1059         char *p;
1060 #endif
1061
1062         while (length >= sizeof(*info_element)) {
1063                 if (sizeof(*info_element) + info_element->len > length) {
1064                         IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
1065                                              "info_element->len + 2 > left : "
1066                                              "info_element->len+2=%zd left=%d, id=%d.\n",
1067                                              info_element->len +
1068                                              sizeof(*info_element),
1069                                              length, info_element->id);
1070                         return 1;
1071                 }
1072
1073                 switch (info_element->id) {
1074                 case MFIE_TYPE_SSID:
1075                         if (ieee80211_is_empty_essid(info_element->data,
1076                                                      info_element->len)) {
1077                                 network->flags |= NETWORK_EMPTY_ESSID;
1078                                 break;
1079                         }
1080
1081                         network->ssid_len = min(info_element->len,
1082                                                 (u8) IW_ESSID_MAX_SIZE);
1083                         memcpy(network->ssid, info_element->data,
1084                                network->ssid_len);
1085                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
1086                                 memset(network->ssid + network->ssid_len, 0,
1087                                        IW_ESSID_MAX_SIZE - network->ssid_len);
1088
1089                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1090                                              network->ssid, network->ssid_len);
1091                         break;
1092
1093                 case MFIE_TYPE_RATES:
1094 #ifdef CONFIG_IEEE80211_DEBUG
1095                         p = rates_str;
1096 #endif
1097                         network->rates_len = min(info_element->len,
1098                                                  MAX_RATES_LENGTH);
1099                         for (i = 0; i < network->rates_len; i++) {
1100                                 network->rates[i] = info_element->data[i];
1101 #ifdef CONFIG_IEEE80211_DEBUG
1102                                 p += snprintf(p, sizeof(rates_str) -
1103                                               (p - rates_str), "%02X ",
1104                                               network->rates[i]);
1105 #endif
1106                                 if (ieee80211_is_ofdm_rate
1107                                     (info_element->data[i])) {
1108                                         network->flags |= NETWORK_HAS_OFDM;
1109                                         if (info_element->data[i] &
1110                                             IEEE80211_BASIC_RATE_MASK)
1111                                                 network->flags &=
1112                                                     ~NETWORK_HAS_CCK;
1113                                 }
1114                         }
1115
1116                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1117                                              rates_str, network->rates_len);
1118                         break;
1119
1120                 case MFIE_TYPE_RATES_EX:
1121 #ifdef CONFIG_IEEE80211_DEBUG
1122                         p = rates_str;
1123 #endif
1124                         network->rates_ex_len = min(info_element->len,
1125                                                     MAX_RATES_EX_LENGTH);
1126                         for (i = 0; i < network->rates_ex_len; i++) {
1127                                 network->rates_ex[i] = info_element->data[i];
1128 #ifdef CONFIG_IEEE80211_DEBUG
1129                                 p += snprintf(p, sizeof(rates_str) -
1130                                               (p - rates_str), "%02X ",
1131                                               network->rates[i]);
1132 #endif
1133                                 if (ieee80211_is_ofdm_rate
1134                                     (info_element->data[i])) {
1135                                         network->flags |= NETWORK_HAS_OFDM;
1136                                         if (info_element->data[i] &
1137                                             IEEE80211_BASIC_RATE_MASK)
1138                                                 network->flags &=
1139                                                     ~NETWORK_HAS_CCK;
1140                                 }
1141                         }
1142
1143                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1144                                              rates_str, network->rates_ex_len);
1145                         break;
1146
1147                 case MFIE_TYPE_DS_SET:
1148                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1149                                              info_element->data[0]);
1150                         network->channel = info_element->data[0];
1151                         break;
1152
1153                 case MFIE_TYPE_FH_SET:
1154                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1155                         break;
1156
1157                 case MFIE_TYPE_CF_SET:
1158                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1159                         break;
1160
1161                 case MFIE_TYPE_TIM:
1162                         network->tim.tim_count = info_element->data[0];
1163                         network->tim.tim_period = info_element->data[1];
1164                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
1165                         break;
1166
1167                 case MFIE_TYPE_ERP_INFO:
1168                         network->erp_value = info_element->data[0];
1169                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1170                                              network->erp_value);
1171                         break;
1172
1173                 case MFIE_TYPE_IBSS_SET:
1174                         network->atim_window = info_element->data[0];
1175                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1176                                              network->atim_window);
1177                         break;
1178
1179                 case MFIE_TYPE_CHALLENGE:
1180                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1181                         break;
1182
1183                 case MFIE_TYPE_GENERIC:
1184                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1185                                              info_element->len);
1186                         if (!ieee80211_parse_qos_info_param_IE(info_element,
1187                                                                network))
1188                                 break;
1189
1190                         if (info_element->len >= 4 &&
1191                             info_element->data[0] == 0x00 &&
1192                             info_element->data[1] == 0x50 &&
1193                             info_element->data[2] == 0xf2 &&
1194                             info_element->data[3] == 0x01) {
1195                                 network->wpa_ie_len = min(info_element->len + 2,
1196                                                           MAX_WPA_IE_LEN);
1197                                 memcpy(network->wpa_ie, info_element,
1198                                        network->wpa_ie_len);
1199                         }
1200                         break;
1201
1202                 case MFIE_TYPE_RSN:
1203                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
1204                                              info_element->len);
1205                         network->rsn_ie_len = min(info_element->len + 2,
1206                                                   MAX_WPA_IE_LEN);
1207                         memcpy(network->rsn_ie, info_element,
1208                                network->rsn_ie_len);
1209                         break;
1210
1211                 case MFIE_TYPE_QOS_PARAMETER:
1212                         printk(KERN_ERR
1213                                "QoS Error need to parse QOS_PARAMETER IE\n");
1214                         break;
1215                         /* 802.11h */
1216                 case MFIE_TYPE_POWER_CONSTRAINT:
1217                         network->power_constraint = info_element->data[0];
1218                         network->flags |= NETWORK_HAS_POWER_CONSTRAINT;
1219                         break;
1220
1221                 case MFIE_TYPE_CSA:
1222                         network->power_constraint = info_element->data[0];
1223                         network->flags |= NETWORK_HAS_CSA;
1224                         break;
1225
1226                 case MFIE_TYPE_QUIET:
1227                         network->quiet.count = info_element->data[0];
1228                         network->quiet.period = info_element->data[1];
1229                         network->quiet.duration = info_element->data[2];
1230                         network->quiet.offset = info_element->data[3];
1231                         network->flags |= NETWORK_HAS_QUIET;
1232                         break;
1233
1234                 case MFIE_TYPE_IBSS_DFS:
1235                         if (network->ibss_dfs)
1236                                 break;
1237                         network->ibss_dfs =
1238                             kmalloc(info_element->len, GFP_ATOMIC);
1239                         if (!network->ibss_dfs)
1240                                 return 1;
1241                         memcpy(network->ibss_dfs, info_element->data,
1242                                info_element->len);
1243                         network->flags |= NETWORK_HAS_IBSS_DFS;
1244                         break;
1245
1246                 case MFIE_TYPE_TPC_REPORT:
1247                         network->tpc_report.transmit_power =
1248                             info_element->data[0];
1249                         network->tpc_report.link_margin = info_element->data[1];
1250                         network->flags |= NETWORK_HAS_TPC_REPORT;
1251                         break;
1252
1253                 default:
1254                         IEEE80211_DEBUG_MGMT
1255                             ("Unsupported info element: %s (%d)\n",
1256                              get_info_element_string(info_element->id),
1257                              info_element->id);
1258                         break;
1259                 }
1260
1261                 length -= sizeof(*info_element) + info_element->len;
1262                 info_element =
1263                     (struct ieee80211_info_element *)&info_element->
1264                     data[info_element->len];
1265         }
1266
1267         return 0;
1268 }
1269
1270 static int ieee80211_handle_assoc_resp(struct ieee80211_device *ieee, struct ieee80211_assoc_response
1271                                        *frame, struct ieee80211_rx_stats *stats)
1272 {
1273         struct ieee80211_network network_resp = {
1274                 .ibss_dfs = NULL,
1275         };
1276         struct ieee80211_network *network = &network_resp;
1277         struct net_device *dev = ieee->dev;
1278
1279         network->flags = 0;
1280         network->qos_data.active = 0;
1281         network->qos_data.supported = 0;
1282         network->qos_data.param_count = 0;
1283         network->qos_data.old_param_count = 0;
1284
1285         //network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF);
1286         network->atim_window = le16_to_cpu(frame->aid);
1287         network->listen_interval = le16_to_cpu(frame->status);
1288         memcpy(network->bssid, frame->header.addr3, ETH_ALEN);
1289         network->capability = le16_to_cpu(frame->capability);
1290         network->last_scanned = jiffies;
1291         network->rates_len = network->rates_ex_len = 0;
1292         network->last_associate = 0;
1293         network->ssid_len = 0;
1294         network->erp_value =
1295             (network->capability & WLAN_CAPABILITY_IBSS) ? 0x3 : 0x0;
1296
1297         if (stats->freq == IEEE80211_52GHZ_BAND) {
1298                 /* for A band (No DS info) */
1299                 network->channel = stats->received_channel;
1300         } else
1301                 network->flags |= NETWORK_HAS_CCK;
1302
1303         network->wpa_ie_len = 0;
1304         network->rsn_ie_len = 0;
1305
1306         if (ieee80211_parse_info_param
1307             (frame->info_element, stats->len - sizeof(*frame), network))
1308                 return 1;
1309
1310         network->mode = 0;
1311         if (stats->freq == IEEE80211_52GHZ_BAND)
1312                 network->mode = IEEE_A;
1313         else {
1314                 if (network->flags & NETWORK_HAS_OFDM)
1315                         network->mode |= IEEE_G;
1316                 if (network->flags & NETWORK_HAS_CCK)
1317                         network->mode |= IEEE_B;
1318         }
1319
1320         if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
1321                 network->flags |= NETWORK_EMPTY_ESSID;
1322
1323         memcpy(&network->stats, stats, sizeof(network->stats));
1324
1325         if (ieee->handle_assoc_response != NULL)
1326                 ieee->handle_assoc_response(dev, frame, network);
1327
1328         return 0;
1329 }
1330
1331 /***************************************************/
1332
1333 static int ieee80211_network_init(struct ieee80211_device *ieee, struct ieee80211_probe_response
1334                                          *beacon,
1335                                          struct ieee80211_network *network,
1336                                          struct ieee80211_rx_stats *stats)
1337 {
1338         network->qos_data.active = 0;
1339         network->qos_data.supported = 0;
1340         network->qos_data.param_count = 0;
1341         network->qos_data.old_param_count = 0;
1342
1343         /* Pull out fixed field data */
1344         memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
1345         network->capability = le16_to_cpu(beacon->capability);
1346         network->last_scanned = jiffies;
1347         network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
1348         network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
1349         network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
1350         /* Where to pull this? beacon->listen_interval; */
1351         network->listen_interval = 0x0A;
1352         network->rates_len = network->rates_ex_len = 0;
1353         network->last_associate = 0;
1354         network->ssid_len = 0;
1355         network->flags = 0;
1356         network->atim_window = 0;
1357         network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
1358             0x3 : 0x0;
1359
1360         if (stats->freq == IEEE80211_52GHZ_BAND) {
1361                 /* for A band (No DS info) */
1362                 network->channel = stats->received_channel;
1363         } else
1364                 network->flags |= NETWORK_HAS_CCK;
1365
1366         network->wpa_ie_len = 0;
1367         network->rsn_ie_len = 0;
1368
1369         if (ieee80211_parse_info_param
1370             (beacon->info_element, stats->len - sizeof(*beacon), network))
1371                 return 1;
1372
1373         network->mode = 0;
1374         if (stats->freq == IEEE80211_52GHZ_BAND)
1375                 network->mode = IEEE_A;
1376         else {
1377                 if (network->flags & NETWORK_HAS_OFDM)
1378                         network->mode |= IEEE_G;
1379                 if (network->flags & NETWORK_HAS_CCK)
1380                         network->mode |= IEEE_B;
1381         }
1382
1383         if (network->mode == 0) {
1384                 IEEE80211_DEBUG_SCAN("Filtered out '%s (" MAC_FMT ")' "
1385                                      "network.\n",
1386                                      escape_essid(network->ssid,
1387                                                   network->ssid_len),
1388                                      MAC_ARG(network->bssid));
1389                 return 1;
1390         }
1391
1392         if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
1393                 network->flags |= NETWORK_EMPTY_ESSID;
1394
1395         memcpy(&network->stats, stats, sizeof(network->stats));
1396
1397         return 0;
1398 }
1399
1400 static inline int is_same_network(struct ieee80211_network *src,
1401                                   struct ieee80211_network *dst)
1402 {
1403         /* A network is only a duplicate if the channel, BSSID, and ESSID
1404          * all match.  We treat all <hidden> with the same BSSID and channel
1405          * as one network */
1406         return ((src->ssid_len == dst->ssid_len) &&
1407                 (src->channel == dst->channel) &&
1408                 !compare_ether_addr(src->bssid, dst->bssid) &&
1409                 !memcmp(src->ssid, dst->ssid, src->ssid_len));
1410 }
1411
1412 static void update_network(struct ieee80211_network *dst,
1413                                   struct ieee80211_network *src)
1414 {
1415         int qos_active;
1416         u8 old_param;
1417
1418         ieee80211_network_reset(dst);
1419         dst->ibss_dfs = src->ibss_dfs;
1420
1421         /* We only update the statistics if they were created by receiving
1422          * the network information on the actual channel the network is on.
1423          *
1424          * This keeps beacons received on neighbor channels from bringing
1425          * down the signal level of an AP. */
1426         if (dst->channel == src->stats.received_channel)
1427                 memcpy(&dst->stats, &src->stats,
1428                        sizeof(struct ieee80211_rx_stats));
1429         else
1430                 IEEE80211_DEBUG_SCAN("Network " MAC_FMT " info received "
1431                         "off channel (%d vs. %d)\n", MAC_ARG(src->bssid),
1432                         dst->channel, src->stats.received_channel);
1433
1434         dst->capability = src->capability;
1435         memcpy(dst->rates, src->rates, src->rates_len);
1436         dst->rates_len = src->rates_len;
1437         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
1438         dst->rates_ex_len = src->rates_ex_len;
1439
1440         dst->mode = src->mode;
1441         dst->flags = src->flags;
1442         dst->time_stamp[0] = src->time_stamp[0];
1443         dst->time_stamp[1] = src->time_stamp[1];
1444
1445         dst->beacon_interval = src->beacon_interval;
1446         dst->listen_interval = src->listen_interval;
1447         dst->atim_window = src->atim_window;
1448         dst->erp_value = src->erp_value;
1449         dst->tim = src->tim;
1450
1451         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
1452         dst->wpa_ie_len = src->wpa_ie_len;
1453         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
1454         dst->rsn_ie_len = src->rsn_ie_len;
1455
1456         dst->last_scanned = jiffies;
1457         qos_active = src->qos_data.active;
1458         old_param = dst->qos_data.old_param_count;
1459         if (dst->flags & NETWORK_HAS_QOS_MASK)
1460                 memcpy(&dst->qos_data, &src->qos_data,
1461                        sizeof(struct ieee80211_qos_data));
1462         else {
1463                 dst->qos_data.supported = src->qos_data.supported;
1464                 dst->qos_data.param_count = src->qos_data.param_count;
1465         }
1466
1467         if (dst->qos_data.supported == 1) {
1468                 if (dst->ssid_len)
1469                         IEEE80211_DEBUG_QOS
1470                             ("QoS the network %s is QoS supported\n",
1471                              dst->ssid);
1472                 else
1473                         IEEE80211_DEBUG_QOS
1474                             ("QoS the network is QoS supported\n");
1475         }
1476         dst->qos_data.active = qos_active;
1477         dst->qos_data.old_param_count = old_param;
1478
1479         /* dst->last_associate is not overwritten */
1480 }
1481
1482 static inline int is_beacon(__le16 fc)
1483 {
1484         return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
1485 }
1486
1487 static void ieee80211_process_probe_response(struct ieee80211_device
1488                                                     *ieee, struct
1489                                                     ieee80211_probe_response
1490                                                     *beacon, struct ieee80211_rx_stats
1491                                                     *stats)
1492 {
1493         struct net_device *dev = ieee->dev;
1494         struct ieee80211_network network = {
1495                 .ibss_dfs = NULL,
1496         };
1497         struct ieee80211_network *target;
1498         struct ieee80211_network *oldest = NULL;
1499 #ifdef CONFIG_IEEE80211_DEBUG
1500         struct ieee80211_info_element *info_element = beacon->info_element;
1501 #endif
1502         unsigned long flags;
1503
1504         IEEE80211_DEBUG_SCAN("'%s' (" MAC_FMT
1505                              "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1506                              escape_essid(info_element->data,
1507                                           info_element->len),
1508                              MAC_ARG(beacon->header.addr3),
1509                              (beacon->capability & (1 << 0xf)) ? '1' : '0',
1510                              (beacon->capability & (1 << 0xe)) ? '1' : '0',
1511                              (beacon->capability & (1 << 0xd)) ? '1' : '0',
1512                              (beacon->capability & (1 << 0xc)) ? '1' : '0',
1513                              (beacon->capability & (1 << 0xb)) ? '1' : '0',
1514                              (beacon->capability & (1 << 0xa)) ? '1' : '0',
1515                              (beacon->capability & (1 << 0x9)) ? '1' : '0',
1516                              (beacon->capability & (1 << 0x8)) ? '1' : '0',
1517                              (beacon->capability & (1 << 0x7)) ? '1' : '0',
1518                              (beacon->capability & (1 << 0x6)) ? '1' : '0',
1519                              (beacon->capability & (1 << 0x5)) ? '1' : '0',
1520                              (beacon->capability & (1 << 0x4)) ? '1' : '0',
1521                              (beacon->capability & (1 << 0x3)) ? '1' : '0',
1522                              (beacon->capability & (1 << 0x2)) ? '1' : '0',
1523                              (beacon->capability & (1 << 0x1)) ? '1' : '0',
1524                              (beacon->capability & (1 << 0x0)) ? '1' : '0');
1525
1526         if (ieee80211_network_init(ieee, beacon, &network, stats)) {
1527                 IEEE80211_DEBUG_SCAN("Dropped '%s' (" MAC_FMT ") via %s.\n",
1528                                      escape_essid(info_element->data,
1529                                                   info_element->len),
1530                                      MAC_ARG(beacon->header.addr3),
1531                                      is_beacon(beacon->header.frame_ctl) ?
1532                                      "BEACON" : "PROBE RESPONSE");
1533                 return;
1534         }
1535
1536         /* The network parsed correctly -- so now we scan our known networks
1537          * to see if we can find it in our list.
1538          *
1539          * NOTE:  This search is definitely not optimized.  Once its doing
1540          *        the "right thing" we'll optimize it for efficiency if
1541          *        necessary */
1542
1543         /* Search for this entry in the list and update it if it is
1544          * already there. */
1545
1546         spin_lock_irqsave(&ieee->lock, flags);
1547
1548         list_for_each_entry(target, &ieee->network_list, list) {
1549                 if (is_same_network(target, &network))
1550                         break;
1551
1552                 if ((oldest == NULL) ||
1553                     (target->last_scanned < oldest->last_scanned))
1554                         oldest = target;
1555         }
1556
1557         /* If we didn't find a match, then get a new network slot to initialize
1558          * with this beacon's information */
1559         if (&target->list == &ieee->network_list) {
1560                 if (list_empty(&ieee->network_free_list)) {
1561                         /* If there are no more slots, expire the oldest */
1562                         list_del(&oldest->list);
1563                         target = oldest;
1564                         IEEE80211_DEBUG_SCAN("Expired '%s' (" MAC_FMT ") from "
1565                                              "network list.\n",
1566                                              escape_essid(target->ssid,
1567                                                           target->ssid_len),
1568                                              MAC_ARG(target->bssid));
1569                         ieee80211_network_reset(target);
1570                 } else {
1571                         /* Otherwise just pull from the free list */
1572                         target = list_entry(ieee->network_free_list.next,
1573                                             struct ieee80211_network, list);
1574                         list_del(ieee->network_free_list.next);
1575                 }
1576
1577 #ifdef CONFIG_IEEE80211_DEBUG
1578                 IEEE80211_DEBUG_SCAN("Adding '%s' (" MAC_FMT ") via %s.\n",
1579                                      escape_essid(network.ssid,
1580                                                   network.ssid_len),
1581                                      MAC_ARG(network.bssid),
1582                                      is_beacon(beacon->header.frame_ctl) ?
1583                                      "BEACON" : "PROBE RESPONSE");
1584 #endif
1585                 memcpy(target, &network, sizeof(*target));
1586                 network.ibss_dfs = NULL;
1587                 list_add_tail(&target->list, &ieee->network_list);
1588         } else {
1589                 IEEE80211_DEBUG_SCAN("Updating '%s' (" MAC_FMT ") via %s.\n",
1590                                      escape_essid(target->ssid,
1591                                                   target->ssid_len),
1592                                      MAC_ARG(target->bssid),
1593                                      is_beacon(beacon->header.frame_ctl) ?
1594                                      "BEACON" : "PROBE RESPONSE");
1595                 update_network(target, &network);
1596                 network.ibss_dfs = NULL;
1597         }
1598
1599         spin_unlock_irqrestore(&ieee->lock, flags);
1600
1601         if (is_beacon(beacon->header.frame_ctl)) {
1602                 if (ieee->handle_beacon != NULL)
1603                         ieee->handle_beacon(dev, beacon, target);
1604         } else {
1605                 if (ieee->handle_probe_response != NULL)
1606                         ieee->handle_probe_response(dev, beacon, target);
1607         }
1608 }
1609
1610 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
1611                       struct ieee80211_hdr_4addr *header,
1612                       struct ieee80211_rx_stats *stats)
1613 {
1614         switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
1615         case IEEE80211_STYPE_ASSOC_RESP:
1616                 IEEE80211_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
1617                                      WLAN_FC_GET_STYPE(le16_to_cpu
1618                                                        (header->frame_ctl)));
1619                 ieee80211_handle_assoc_resp(ieee,
1620                                             (struct ieee80211_assoc_response *)
1621                                             header, stats);
1622                 break;
1623
1624         case IEEE80211_STYPE_REASSOC_RESP:
1625                 IEEE80211_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
1626                                      WLAN_FC_GET_STYPE(le16_to_cpu
1627                                                        (header->frame_ctl)));
1628                 break;
1629
1630         case IEEE80211_STYPE_PROBE_REQ:
1631                 IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1632                                      WLAN_FC_GET_STYPE(le16_to_cpu
1633                                                        (header->frame_ctl)));
1634
1635                 if (ieee->handle_probe_request != NULL)
1636                         ieee->handle_probe_request(ieee->dev,
1637                                                    (struct
1638                                                     ieee80211_probe_request *)
1639                                                    header, stats);
1640                 break;
1641
1642         case IEEE80211_STYPE_PROBE_RESP:
1643                 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1644                                      WLAN_FC_GET_STYPE(le16_to_cpu
1645                                                        (header->frame_ctl)));
1646                 IEEE80211_DEBUG_SCAN("Probe response\n");
1647                 ieee80211_process_probe_response(ieee,
1648                                                  (struct
1649                                                   ieee80211_probe_response *)
1650                                                  header, stats);
1651                 break;
1652
1653         case IEEE80211_STYPE_BEACON:
1654                 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
1655                                      WLAN_FC_GET_STYPE(le16_to_cpu
1656                                                        (header->frame_ctl)));
1657                 IEEE80211_DEBUG_SCAN("Beacon\n");
1658                 ieee80211_process_probe_response(ieee,
1659                                                  (struct
1660                                                   ieee80211_probe_response *)
1661                                                  header, stats);
1662                 break;
1663         case IEEE80211_STYPE_AUTH:
1664
1665                 IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1666                                      WLAN_FC_GET_STYPE(le16_to_cpu
1667                                                        (header->frame_ctl)));
1668
1669                 if (ieee->handle_auth != NULL)
1670                         ieee->handle_auth(ieee->dev,
1671                                           (struct ieee80211_auth *)header);
1672                 break;
1673
1674         case IEEE80211_STYPE_DISASSOC:
1675                 if (ieee->handle_disassoc != NULL)
1676                         ieee->handle_disassoc(ieee->dev,
1677                                               (struct ieee80211_disassoc *)
1678                                               header);
1679                 break;
1680
1681         case IEEE80211_STYPE_ACTION:
1682                 IEEE80211_DEBUG_MGMT("ACTION\n");
1683                 if (ieee->handle_action)
1684                         ieee->handle_action(ieee->dev,
1685                                             (struct ieee80211_action *)
1686                                             header, stats);
1687                 break;
1688
1689         case IEEE80211_STYPE_REASSOC_REQ:
1690                 IEEE80211_DEBUG_MGMT("received reassoc (%d)\n",
1691                                      WLAN_FC_GET_STYPE(le16_to_cpu
1692                                                        (header->frame_ctl)));
1693
1694                 IEEE80211_DEBUG_MGMT("%s: IEEE80211_REASSOC_REQ received\n",
1695                                      ieee->dev->name);
1696                 if (ieee->handle_reassoc_request != NULL)
1697                         ieee->handle_reassoc_request(ieee->dev,
1698                                                     (struct ieee80211_reassoc_request *)
1699                                                      header);
1700                 break;
1701
1702         case IEEE80211_STYPE_ASSOC_REQ:
1703                 IEEE80211_DEBUG_MGMT("received assoc (%d)\n",
1704                                      WLAN_FC_GET_STYPE(le16_to_cpu
1705                                                        (header->frame_ctl)));
1706
1707                 IEEE80211_DEBUG_MGMT("%s: IEEE80211_ASSOC_REQ received\n",
1708                                      ieee->dev->name);
1709                 if (ieee->handle_assoc_request != NULL)
1710                         ieee->handle_assoc_request(ieee->dev);
1711                 break;
1712
1713         case IEEE80211_STYPE_DEAUTH:
1714                 IEEE80211_DEBUG_MGMT("DEAUTH\n");
1715                 if (ieee->handle_deauth != NULL)
1716                         ieee->handle_deauth(ieee->dev,
1717                                             (struct ieee80211_deauth *)
1718                                             header);
1719                 break;
1720         default:
1721                 IEEE80211_DEBUG_MGMT("received UNKNOWN (%d)\n",
1722                                      WLAN_FC_GET_STYPE(le16_to_cpu
1723                                                        (header->frame_ctl)));
1724                 IEEE80211_DEBUG_MGMT("%s: Unknown management packet: %d\n",
1725                                      ieee->dev->name,
1726                                      WLAN_FC_GET_STYPE(le16_to_cpu
1727                                                        (header->frame_ctl)));
1728                 break;
1729         }
1730 }
1731
1732 EXPORT_SYMBOL(ieee80211_rx_mgt);
1733 EXPORT_SYMBOL(ieee80211_rx);