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  * <j@w1.fi>
   7  * Copyright (c) 2002-2003, Jouni Malinen <j@w1.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_reset_mac_header(skb);
  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         if (skb->len < hdrlen) {
 370                 printk(KERN_INFO "%s: invalid SKB length %d\n",
 371                         dev->name, skb->len);
 372                 goto rx_dropped;
 373         }
 374
 375         /* Put this code here so that we avoid duplicating it in all
 376          * Rx paths. - Jean II */
 377 #ifdef CONFIG_WIRELESS_EXT
 378 #ifdef IW_WIRELESS_SPY          /* defined in iw_handler.h */
 379         /* If spy monitoring on */
 380         if (ieee->spy_data.spy_number > 0) {
 381                 struct iw_quality wstats;
 382
 383                 wstats.updated = 0;
 384                 if (rx_stats->mask & IEEE80211_STATMASK_RSSI) {
 385                         wstats.level = rx_stats->rssi;
 386                         wstats.updated |= IW_QUAL_LEVEL_UPDATED;
 387                 } else
 388                         wstats.updated |= IW_QUAL_LEVEL_INVALID;
 389
 390                 if (rx_stats->mask & IEEE80211_STATMASK_NOISE) {
 391                         wstats.noise = rx_stats->noise;
 392                         wstats.updated |= IW_QUAL_NOISE_UPDATED;
 393                 } else
 394                         wstats.updated |= IW_QUAL_NOISE_INVALID;
 395
 396                 if (rx_stats->mask & IEEE80211_STATMASK_SIGNAL) {
 397                         wstats.qual = rx_stats->signal;
 398                         wstats.updated |= IW_QUAL_QUAL_UPDATED;
 399                 } else
 400                         wstats.updated |= IW_QUAL_QUAL_INVALID;
 401
 402                 /* Update spy records */
 403                 wireless_spy_update(ieee->dev, hdr->addr2, &wstats);
 404         }
 405 #endif                          /* IW_WIRELESS_SPY */
 406 #endif                          /* CONFIG_WIRELESS_EXT */
 407
 408 #ifdef NOT_YET
 409         hostap_update_rx_stats(local->ap, hdr, rx_stats);
 410 #endif
 411
 412         if (ieee->iw_mode == IW_MODE_MONITOR) {
 413                 stats->rx_packets++;
 414                 stats->rx_bytes += skb->len;
 415                 ieee80211_monitor_rx(ieee, skb, rx_stats);
 416                 return 1;
 417         }
 418
 419         can_be_decrypted = (is_multicast_ether_addr(hdr->addr1) ||
 420                             is_broadcast_ether_addr(hdr->addr2)) ?
 421             ieee->host_mc_decrypt : ieee->host_decrypt;
 422
 423         if (can_be_decrypted) {
 424                 if (skb->len >= hdrlen + 3) {
 425                         /* Top two-bits of byte 3 are the key index */
 426                         keyidx = skb->data[hdrlen + 3] >> 6;
 427                 }
 428
 429                 /* ieee->crypt[] is WEP_KEY (4) in length.  Given that keyidx
 430                  * is only allowed 2-bits of storage, no value of keyidx can
 431                  * be provided via above code that would result in keyidx
 432                  * being out of range */
 433                 crypt = ieee->crypt[keyidx];
 434
 435 #ifdef NOT_YET
 436                 sta = NULL;
 437
 438                 /* Use station specific key to override default keys if the
 439                  * receiver address is a unicast address ("individual RA"). If
 440                  * bcrx_sta_key parameter is set, station specific key is used
 441                  * even with broad/multicast targets (this is against IEEE
 442                  * 802.11, but makes it easier to use different keys with
 443                  * stations that do not support WEP key mapping). */
 444
 445                 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
 446                         (void)hostap_handle_sta_crypto(local, hdr, &crypt,
 447                                                        &sta);
 448 #endif
 449
 450                 /* allow NULL decrypt to indicate an station specific override
 451                  * for default encryption */
 452                 if (crypt && (crypt->ops == NULL ||
 453                               crypt->ops->decrypt_mpdu == NULL))
 454                         crypt = NULL;
 455
 456                 if (!crypt && (fc & IEEE80211_FCTL_PROTECTED)) {
 457                         /* This seems to be triggered by some (multicast?)
 458                          * frames from other than current BSS, so just drop the
 459                          * frames silently instead of filling system log with
 460                          * these reports. */
 461                         IEEE80211_DEBUG_DROP("Decryption failed (not set)"
 462                                              " (SA=" MAC_FMT ")\n",
 463                                              MAC_ARG(hdr->addr2));
 464                         ieee->ieee_stats.rx_discards_undecryptable++;
 465                         goto rx_dropped;
 466                 }
 467         }
 468 #ifdef NOT_YET
 469         if (type != WLAN_FC_TYPE_DATA) {
 470                 if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_AUTH &&
 471                     fc & IEEE80211_FCTL_PROTECTED && ieee->host_decrypt &&
 472                     (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0) {
 473                         printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
 474                                "from " MAC_FMT "\n", dev->name,
 475                                MAC_ARG(hdr->addr2));
 476                         /* TODO: could inform hostapd about this so that it
 477                          * could send auth failure report */
 478                         goto rx_dropped;
 479                 }
 480
 481                 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
 482                         goto rx_dropped;
 483                 else
 484                         goto rx_exit;
 485         }
 486 #endif
 487         /* drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.29) */
 488         if (sc == ieee->prev_seq_ctl)
 489                 goto rx_dropped;
 490         else
 491                 ieee->prev_seq_ctl = sc;
 492
 493         /* Data frame - extract src/dst addresses */
 494         if (skb->len < IEEE80211_3ADDR_LEN)
 495                 goto rx_dropped;
 496
 497         switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
 498         case IEEE80211_FCTL_FROMDS:
 499                 memcpy(dst, hdr->addr1, ETH_ALEN);
 500                 memcpy(src, hdr->addr3, ETH_ALEN);
 501                 break;
 502         case IEEE80211_FCTL_TODS:
 503                 memcpy(dst, hdr->addr3, ETH_ALEN);
 504                 memcpy(src, hdr->addr2, ETH_ALEN);
 505                 break;
 506         case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
 507                 if (skb->len < IEEE80211_4ADDR_LEN)
 508                         goto rx_dropped;
 509                 memcpy(dst, hdr->addr3, ETH_ALEN);
 510                 memcpy(src, hdr->addr4, ETH_ALEN);
 511                 break;
 512         case 0:
 513                 memcpy(dst, hdr->addr1, ETH_ALEN);
 514                 memcpy(src, hdr->addr2, ETH_ALEN);
 515                 break;
 516         }
 517
 518 #ifdef NOT_YET
 519         if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
 520                 goto rx_dropped;
 521         if (wds) {
 522                 skb->dev = dev = wds;
 523                 stats = hostap_get_stats(dev);
 524         }
 525
 526         if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
 527             (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 528             IEEE80211_FCTL_FROMDS && ieee->stadev
 529             && !compare_ether_addr(hdr->addr2, ieee->assoc_ap_addr)) {
 530                 /* Frame from BSSID of the AP for which we are a client */
 531                 skb->dev = dev = ieee->stadev;
 532                 stats = hostap_get_stats(dev);
 533                 from_assoc_ap = 1;
 534         }
 535 #endif
 536
 537         dev->last_rx = jiffies;
 538
 539 #ifdef NOT_YET
 540         if ((ieee->iw_mode == IW_MODE_MASTER ||
 541              ieee->iw_mode == IW_MODE_REPEAT) && !from_assoc_ap) {
 542                 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
 543                                              wds != NULL)) {
 544                 case AP_RX_CONTINUE_NOT_AUTHORIZED:
 545                         frame_authorized = 0;
 546                         break;
 547                 case AP_RX_CONTINUE:
 548                         frame_authorized = 1;
 549                         break;
 550                 case AP_RX_DROP:
 551                         goto rx_dropped;
 552                 case AP_RX_EXIT:
 553                         goto rx_exit;
 554                 }
 555         }
 556 #endif
 557
 558         /* Nullfunc frames may have PS-bit set, so they must be passed to
 559          * hostap_handle_sta_rx() before being dropped here. */
 560
 561         stype &= ~IEEE80211_STYPE_QOS_DATA;
 562
 563         if (stype != IEEE80211_STYPE_DATA &&
 564             stype != IEEE80211_STYPE_DATA_CFACK &&
 565             stype != IEEE80211_STYPE_DATA_CFPOLL &&
 566             stype != IEEE80211_STYPE_DATA_CFACKPOLL) {
 567                 if (stype != IEEE80211_STYPE_NULLFUNC)
 568                         IEEE80211_DEBUG_DROP("RX: dropped data frame "
 569                                              "with no data (type=0x%02x, "
 570                                              "subtype=0x%02x, len=%d)\n",
 571                                              type, stype, skb->len);
 572                 goto rx_dropped;
 573         }
 574
 575         /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
 576
 577         if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 578             (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
 579                 goto rx_dropped;
 580
 581         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 582
 583         /* skb: hdr + (possibly fragmented) plaintext payload */
 584         // PR: FIXME: hostap has additional conditions in the "if" below:
 585         // ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
 586         if ((frag != 0) || (fc & IEEE80211_FCTL_MOREFRAGS)) {
 587                 int flen;
 588                 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
 589                 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
 590
 591                 if (!frag_skb) {
 592                         IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
 593                                         "Rx cannot get skb from fragment "
 594                                         "cache (morefrag=%d seq=%u frag=%u)\n",
 595                                         (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
 596                                         WLAN_GET_SEQ_SEQ(sc), frag);
 597                         goto rx_dropped;
 598                 }
 599
 600                 flen = skb->len;
 601                 if (frag != 0)
 602                         flen -= hdrlen;
 603
 604                 if (frag_skb->tail + flen > frag_skb->end) {
 605                         printk(KERN_WARNING "%s: host decrypted and "
 606                                "reassembled frame did not fit skb\n",
 607                                dev->name);
 608                         ieee80211_frag_cache_invalidate(ieee, hdr);
 609                         goto rx_dropped;
 610                 }
 611
 612                 if (frag == 0) {
 613                         /* copy first fragment (including full headers) into
 614                          * beginning of the fragment cache skb */
 615                         skb_copy_from_linear_data(skb, skb_put(frag_skb, flen), flen);
 616                 } else {
 617                         /* append frame payload to the end of the fragment
 618                          * cache skb */
 619                         skb_copy_from_linear_data_offset(skb, hdrlen,
 620                                       skb_put(frag_skb, flen), flen);
 621                 }
 622                 dev_kfree_skb_any(skb);
 623                 skb = NULL;
 624
 625                 if (fc & IEEE80211_FCTL_MOREFRAGS) {
 626                         /* more fragments expected - leave the skb in fragment
 627                          * cache for now; it will be delivered to upper layers
 628                          * after all fragments have been received */
 629                         goto rx_exit;
 630                 }
 631
 632                 /* this was the last fragment and the frame will be
 633                  * delivered, so remove skb from fragment cache */
 634                 skb = frag_skb;
 635                 hdr = (struct ieee80211_hdr_4addr *)skb->data;
 636                 ieee80211_frag_cache_invalidate(ieee, hdr);
 637         }
 638
 639         /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
 640          * encrypted/authenticated */
 641         if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 642             ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
 643                 goto rx_dropped;
 644
 645         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 646         if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) {
 647                 if (            /*ieee->ieee802_1x && */
 648                            ieee80211_is_eapol_frame(ieee, skb)) {
 649                         /* pass unencrypted EAPOL frames even if encryption is
 650                          * configured */
 651                 } else {
 652                         IEEE80211_DEBUG_DROP("encryption configured, but RX "
 653                                              "frame not encrypted (SA=" MAC_FMT
 654                                              ")\n", MAC_ARG(hdr->addr2));
 655                         goto rx_dropped;
 656                 }
 657         }
 658
 659         if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep &&
 660             !ieee80211_is_eapol_frame(ieee, skb)) {
 661                 IEEE80211_DEBUG_DROP("dropped unencrypted RX data "
 662                                      "frame from " MAC_FMT
 663                                      " (drop_unencrypted=1)\n",
 664                                      MAC_ARG(hdr->addr2));
 665                 goto rx_dropped;
 666         }
 667
 668         /* If the frame was decrypted in hardware, we may need to strip off
 669          * any security data (IV, ICV, etc) that was left behind */
 670         if (!can_be_decrypted && (fc & IEEE80211_FCTL_PROTECTED) &&
 671             ieee->host_strip_iv_icv) {
 672                 int trimlen = 0;
 673
 674                 /* Top two-bits of byte 3 are the key index */
 675                 if (skb->len >= hdrlen + 3)
 676                         keyidx = skb->data[hdrlen + 3] >> 6;
 677
 678                 /* To strip off any security data which appears before the
 679                  * payload, we simply increase hdrlen (as the header gets
 680                  * chopped off immediately below). For the security data which
 681                  * appears after the payload, we use skb_trim. */
 682
 683                 switch (ieee->sec.encode_alg[keyidx]) {
 684                 case SEC_ALG_WEP:
 685                         /* 4 byte IV */
 686                         hdrlen += 4;
 687                         /* 4 byte ICV */
 688                         trimlen = 4;
 689                         break;
 690                 case SEC_ALG_TKIP:
 691                         /* 4 byte IV, 4 byte ExtIV */
 692                         hdrlen += 8;
 693                         /* 8 byte MIC, 4 byte ICV */
 694                         trimlen = 12;
 695                         break;
 696                 case SEC_ALG_CCMP:
 697                         /* 8 byte CCMP header */
 698                         hdrlen += 8;
 699                         /* 8 byte MIC */
 700                         trimlen = 8;
 701                         break;
 702                 }
 703
 704                 if (skb->len < trimlen)
 705                         goto rx_dropped;
 706
 707                 __skb_trim(skb, skb->len - trimlen);
 708
 709                 if (skb->len < hdrlen)
 710                         goto rx_dropped;
 711         }
 712
 713         /* skb: hdr + (possible reassembled) full plaintext payload */
 714
 715         payload = skb->data + hdrlen;
 716         ethertype = (payload[6] << 8) | payload[7];
 717
 718 #ifdef NOT_YET
 719         /* If IEEE 802.1X is used, check whether the port is authorized to send
 720          * the received frame. */
 721         if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) {
 722                 if (ethertype == ETH_P_PAE) {
 723                         printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n",
 724                                dev->name);
 725                         if (ieee->hostapd && ieee->apdev) {
 726                                 /* Send IEEE 802.1X frames to the user
 727                                  * space daemon for processing */
 728                                 prism2_rx_80211(ieee->apdev, skb, rx_stats,
 729                                                 PRISM2_RX_MGMT);
 730                                 ieee->apdevstats.rx_packets++;
 731                                 ieee->apdevstats.rx_bytes += skb->len;
 732                                 goto rx_exit;
 733                         }
 734                 } else if (!frame_authorized) {
 735                         printk(KERN_DEBUG "%s: dropped frame from "
 736                                "unauthorized port (IEEE 802.1X): "
 737                                "ethertype=0x%04x\n", dev->name, ethertype);
 738                         goto rx_dropped;
 739                 }
 740         }
 741 #endif
 742
 743         /* convert hdr + possible LLC headers into Ethernet header */
 744         if (skb->len - hdrlen >= 8 &&
 745             ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 &&
 746               ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
 747              memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) {
 748                 /* remove RFC1042 or Bridge-Tunnel encapsulation and
 749                  * replace EtherType */
 750                 skb_pull(skb, hdrlen + SNAP_SIZE);
 751                 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 752                 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 753         } else {
 754                 u16 len;
 755                 /* Leave Ethernet header part of hdr and full payload */
 756                 skb_pull(skb, hdrlen);
 757                 len = htons(skb->len);
 758                 memcpy(skb_push(skb, 2), &len, 2);
 759                 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 760                 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 761         }
 762
 763 #ifdef NOT_YET
 764         if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 765                     IEEE80211_FCTL_TODS) && skb->len >= ETH_HLEN + ETH_ALEN) {
 766                 /* Non-standard frame: get addr4 from its bogus location after
 767                  * the payload */
 768                 skb_copy_to_linear_data_offset(skb, ETH_ALEN,
 769                                                skb->data + skb->len - ETH_ALEN,
 770                                                ETH_ALEN);
 771                 skb_trim(skb, skb->len - ETH_ALEN);
 772         }
 773 #endif
 774
 775         stats->rx_packets++;
 776         stats->rx_bytes += skb->len;
 777
 778 #ifdef NOT_YET
 779         if (ieee->iw_mode == IW_MODE_MASTER && !wds && ieee->ap->bridge_packets) {
 780                 if (dst[0] & 0x01) {
 781                         /* copy multicast frame both to the higher layers and
 782                          * to the wireless media */
 783                         ieee->ap->bridged_multicast++;
 784                         skb2 = skb_clone(skb, GFP_ATOMIC);
 785                         if (skb2 == NULL)
 786                                 printk(KERN_DEBUG "%s: skb_clone failed for "
 787                                        "multicast frame\n", dev->name);
 788                 } else if (hostap_is_sta_assoc(ieee->ap, dst)) {
 789                         /* send frame directly to the associated STA using
 790                          * wireless media and not passing to higher layers */
 791                         ieee->ap->bridged_unicast++;
 792                         skb2 = skb;
 793                         skb = NULL;
 794                 }
 795         }
 796
 797         if (skb2 != NULL) {
 798                 /* send to wireless media */
 799                 skb2->dev = dev;
 800                 skb2->protocol = __constant_htons(ETH_P_802_3);
 801                 skb_reset_mac_header(skb2);
 802                 skb_reset_network_header(skb2);
 803                 /* skb2->network_header += ETH_HLEN; */
 804                 dev_queue_xmit(skb2);
 805         }
 806 #endif
 807
 808         if (skb) {
 809                 skb->protocol = eth_type_trans(skb, dev);
 810                 memset(skb->cb, 0, sizeof(skb->cb));
 811                 skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
 812                 if (netif_rx(skb) == NET_RX_DROP) {
 813                         /* netif_rx always succeeds, but it might drop
 814                          * the packet.  If it drops the packet, we log that
 815                          * in our stats. */
 816                         IEEE80211_DEBUG_DROP
 817                             ("RX: netif_rx dropped the packet\n");
 818                         stats->rx_dropped++;
 819                 }
 820         }
 821
 822       rx_exit:
 823 #ifdef NOT_YET
 824         if (sta)
 825                 hostap_handle_sta_release(sta);
 826 #endif
 827         return 1;
 828
 829       rx_dropped:
 830         stats->rx_dropped++;
 831
 832         /* Returning 0 indicates to caller that we have not handled the SKB--
 833          * so it is still allocated and can be used again by underlying
 834          * hardware as a DMA target */
 835         return 0;
 836 }
 837
 838 /* Filter out unrelated packets, call ieee80211_rx[_mgt]
 839  * This function takes over the skb, it should not be used again after calling
 840  * this function. */
 841 void ieee80211_rx_any(struct ieee80211_device *ieee,
 842                      struct sk_buff *skb, struct ieee80211_rx_stats *stats)
 843 {
 844         struct ieee80211_hdr_4addr *hdr;
 845         int is_packet_for_us;
 846         u16 fc;
 847
 848         if (ieee->iw_mode == IW_MODE_MONITOR) {
 849                 if (!ieee80211_rx(ieee, skb, stats))
 850                         dev_kfree_skb_irq(skb);
 851                 return;
 852         }
 853
 854         if (skb->len < sizeof(struct ieee80211_hdr))
 855                 goto drop_free;
 856
 857         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 858         fc = le16_to_cpu(hdr->frame_ctl);
 859
 860         if ((fc & IEEE80211_FCTL_VERS) != 0)
 861                 goto drop_free;
 862
 863         switch (fc & IEEE80211_FCTL_FTYPE) {
 864         case IEEE80211_FTYPE_MGMT:
 865                 if (skb->len < sizeof(struct ieee80211_hdr_3addr))
 866                         goto drop_free;
 867                 ieee80211_rx_mgt(ieee, hdr, stats);
 868                 dev_kfree_skb_irq(skb);
 869                 return;
 870         case IEEE80211_FTYPE_DATA:
 871                 break;
 872         case IEEE80211_FTYPE_CTL:
 873                 return;
 874         default:
 875                 return;
 876         }
 877
 878         is_packet_for_us = 0;
 879         switch (ieee->iw_mode) {
 880         case IW_MODE_ADHOC:
 881                 /* our BSS and not from/to DS */
 882                 if (memcmp(hdr->addr3, ieee->bssid, ETH_ALEN) == 0)
 883                 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == 0) {
 884                         /* promisc: get all */
 885                         if (ieee->dev->flags & IFF_PROMISC)
 886                                 is_packet_for_us = 1;
 887                         /* to us */
 888                         else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
 889                                 is_packet_for_us = 1;
 890                         /* mcast */
 891                         else if (is_multicast_ether_addr(hdr->addr1))
 892                                 is_packet_for_us = 1;
 893                 }
 894                 break;
 895         case IW_MODE_INFRA:
 896                 /* our BSS (== from our AP) and from DS */
 897                 if (memcmp(hdr->addr2, ieee->bssid, ETH_ALEN) == 0)
 898                 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS) {
 899                         /* promisc: get all */
 900                         if (ieee->dev->flags & IFF_PROMISC)
 901                                 is_packet_for_us = 1;
 902                         /* to us */
 903                         else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
 904                                 is_packet_for_us = 1;
 905                         /* mcast */
 906                         else if (is_multicast_ether_addr(hdr->addr1)) {
 907                                 /* not our own packet bcasted from AP */
 908                                 if (memcmp(hdr->addr3, ieee->dev->dev_addr, ETH_ALEN))
 909                                         is_packet_for_us = 1;
 910                         }
 911                 }
 912                 break;
 913         default:
 914                 /* ? */
 915                 break;
 916         }
 917
 918         if (is_packet_for_us)
 919                 if (!ieee80211_rx(ieee, skb, stats))
 920                         dev_kfree_skb_irq(skb);
 921         return;
 922
 923 drop_free:
 924         dev_kfree_skb_irq(skb);
 925         ieee->stats.rx_dropped++;
 926         return;
 927 }
 928
 929 #define MGMT_FRAME_FIXED_PART_LENGTH            0x24
 930
 931 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
 932
 933 /*
 934 * Make ther structure we read from the beacon packet has
 935 * the right values
 936 */
 937 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
 938                                      *info_element, int sub_type)
 939 {
 940
 941         if (info_element->qui_subtype != sub_type)
 942                 return -1;
 943         if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
 944                 return -1;
 945         if (info_element->qui_type != QOS_OUI_TYPE)
 946                 return -1;
 947         if (info_element->version != QOS_VERSION_1)
 948                 return -1;
 949
 950         return 0;
 951 }
 952
 953 /*
 954  * Parse a QoS parameter element
 955  */
 956 static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
 957                                             *element_param, struct ieee80211_info_element
 958                                             *info_element)
 959 {
 960         int ret = 0;
 961         u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2;
 962
 963         if ((info_element == NULL) || (element_param == NULL))
 964                 return -1;
 965
 966         if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
 967                 memcpy(element_param->info_element.qui, info_element->data,
 968                        info_element->len);
 969                 element_param->info_element.elementID = info_element->id;
 970                 element_param->info_element.length = info_element->len;
 971         } else
 972                 ret = -1;
 973         if (ret == 0)
 974                 ret = ieee80211_verify_qos_info(&element_param->info_element,
 975                                                 QOS_OUI_PARAM_SUB_TYPE);
 976         return ret;
 977 }
 978
 979 /*
 980  * Parse a QoS information element
 981  */
 982 static int ieee80211_read_qos_info_element(struct
 983                                            ieee80211_qos_information_element
 984                                            *element_info, struct ieee80211_info_element
 985                                            *info_element)
 986 {
 987         int ret = 0;
 988         u16 size = sizeof(struct ieee80211_qos_information_element) - 2;
 989
 990         if (element_info == NULL)
 991                 return -1;
 992         if (info_element == NULL)
 993                 return -1;
 994
 995         if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
 996                 memcpy(element_info->qui, info_element->data,
 997                        info_element->len);
 998                 element_info->elementID = info_element->id;
 999                 element_info->length = info_element->len;
1000         } else
1001                 ret = -1;
1002
1003         if (ret == 0)
1004                 ret = ieee80211_verify_qos_info(element_info,
1005                                                 QOS_OUI_INFO_SUB_TYPE);
1006         return ret;
1007 }
1008
1009 /*
1010  * Write QoS parameters from the ac parameters.
1011  */
1012 static int ieee80211_qos_convert_ac_to_parameters(struct
1013                                                   ieee80211_qos_parameter_info
1014                                                   *param_elm, struct
1015                                                   ieee80211_qos_parameters
1016                                                   *qos_param)
1017 {
1018         int rc = 0;
1019         int i;
1020         struct ieee80211_qos_ac_parameter *ac_params;
1021         u32 txop;
1022         u8 cw_min;
1023         u8 cw_max;
1024
1025         for (i = 0; i < QOS_QUEUE_NUM; i++) {
1026                 ac_params = &(param_elm->ac_params_record[i]);
1027
1028                 qos_param->aifs[i] = (ac_params->aci_aifsn) & 0x0F;
1029                 qos_param->aifs[i] -= (qos_param->aifs[i] < 2) ? 0 : 2;
1030
1031                 cw_min = ac_params->ecw_min_max & 0x0F;
1032                 qos_param->cw_min[i] = (u16) ((1 << cw_min) - 1);
1033
1034                 cw_max = (ac_params->ecw_min_max & 0xF0) >> 4;
1035                 qos_param->cw_max[i] = (u16) ((1 << cw_max) - 1);
1036
1037                 qos_param->flag[i] =
1038                     (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1039
1040                 txop = le16_to_cpu(ac_params->tx_op_limit) * 32;
1041                 qos_param->tx_op_limit[i] = (u16) txop;
1042         }
1043         return rc;
1044 }
1045
1046 /*
1047  * we have a generic data element which it may contain QoS information or
1048  * parameters element. check the information element length to decide
1049  * which type to read
1050  */
1051 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
1052                                              *info_element,
1053                                              struct ieee80211_network *network)
1054 {
1055         int rc = 0;
1056         struct ieee80211_qos_parameters *qos_param = NULL;
1057         struct ieee80211_qos_information_element qos_info_element;
1058
1059         rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);
1060
1061         if (rc == 0) {
1062                 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1063                 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1064         } else {
1065                 struct ieee80211_qos_parameter_info param_element;
1066
1067                 rc = ieee80211_read_qos_param_element(&param_element,
1068                                                       info_element);
1069                 if (rc == 0) {
1070                         qos_param = &(network->qos_data.parameters);
1071                         ieee80211_qos_convert_ac_to_parameters(&param_element,
1072                                                                qos_param);
1073                         network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1074                         network->qos_data.param_count =
1075                             param_element.info_element.ac_info & 0x0F;
1076                 }
1077         }
1078
1079         if (rc == 0) {
1080                 IEEE80211_DEBUG_QOS("QoS is supported\n");
1081                 network->qos_data.supported = 1;
1082         }
1083         return rc;
1084 }
1085
1086 #ifdef CONFIG_IEEE80211_DEBUG
1087 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1088
1089 static const char *get_info_element_string(u16 id)
1090 {
1091         switch (id) {
1092                 MFIE_STRING(SSID);
1093                 MFIE_STRING(RATES);
1094                 MFIE_STRING(FH_SET);
1095                 MFIE_STRING(DS_SET);
1096                 MFIE_STRING(CF_SET);
1097                 MFIE_STRING(TIM);
1098                 MFIE_STRING(IBSS_SET);
1099                 MFIE_STRING(COUNTRY);
1100                 MFIE_STRING(HOP_PARAMS);
1101                 MFIE_STRING(HOP_TABLE);
1102                 MFIE_STRING(REQUEST);
1103                 MFIE_STRING(CHALLENGE);
1104                 MFIE_STRING(POWER_CONSTRAINT);
1105                 MFIE_STRING(POWER_CAPABILITY);
1106                 MFIE_STRING(TPC_REQUEST);
1107                 MFIE_STRING(TPC_REPORT);
1108                 MFIE_STRING(SUPP_CHANNELS);
1109                 MFIE_STRING(CSA);
1110                 MFIE_STRING(MEASURE_REQUEST);
1111                 MFIE_STRING(MEASURE_REPORT);
1112                 MFIE_STRING(QUIET);
1113                 MFIE_STRING(IBSS_DFS);
1114                 MFIE_STRING(ERP_INFO);
1115                 MFIE_STRING(RSN);
1116                 MFIE_STRING(RATES_EX);
1117                 MFIE_STRING(GENERIC);
1118                 MFIE_STRING(QOS_PARAMETER);
1119         default:
1120                 return "UNKNOWN";
1121         }
1122 }
1123 #endif
1124
1125 static int ieee80211_parse_info_param(struct ieee80211_info_element
1126                                       *info_element, u16 length,
1127                                       struct ieee80211_network *network)
1128 {
1129         u8 i;
1130 #ifdef CONFIG_IEEE80211_DEBUG
1131         char rates_str[64];
1132         char *p;
1133 #endif
1134
1135         while (length >= sizeof(*info_element)) {
1136                 if (sizeof(*info_element) + info_element->len > length) {
1137                         IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
1138                                              "info_element->len + 2 > left : "
1139                                              "info_element->len+2=%zd left=%d, id=%d.\n",
1140                                              info_element->len +
1141                                              sizeof(*info_element),
1142                                              length, info_element->id);
1143                         /* We stop processing but don't return an error here
1144                          * because some misbehaviour APs break this rule. ie.
1145                          * Orinoco AP1000. */
1146                         break;
1147                 }
1148
1149                 switch (info_element->id) {
1150                 case MFIE_TYPE_SSID:
1151                         if (ieee80211_is_empty_essid(info_element->data,
1152                                                      info_element->len)) {
1153                                 network->flags |= NETWORK_EMPTY_ESSID;
1154                                 break;
1155                         }
1156
1157                         network->ssid_len = min(info_element->len,
1158                                                 (u8) IW_ESSID_MAX_SIZE);
1159                         memcpy(network->ssid, info_element->data,
1160                                network->ssid_len);
1161                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
1162                                 memset(network->ssid + network->ssid_len, 0,
1163                                        IW_ESSID_MAX_SIZE - network->ssid_len);
1164
1165                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1166                                              network->ssid, network->ssid_len);
1167                         break;
1168
1169                 case MFIE_TYPE_RATES:
1170 #ifdef CONFIG_IEEE80211_DEBUG
1171                         p = rates_str;
1172 #endif
1173                         network->rates_len = min(info_element->len,
1174                                                  MAX_RATES_LENGTH);
1175                         for (i = 0; i < network->rates_len; i++) {
1176                                 network->rates[i] = info_element->data[i];
1177 #ifdef CONFIG_IEEE80211_DEBUG
1178                                 p += snprintf(p, sizeof(rates_str) -
1179                                               (p - rates_str), "%02X ",
1180                                               network->rates[i]);
1181 #endif
1182                                 if (ieee80211_is_ofdm_rate
1183                                     (info_element->data[i])) {
1184                                         network->flags |= NETWORK_HAS_OFDM;
1185                                         if (info_element->data[i] &
1186                                             IEEE80211_BASIC_RATE_MASK)
1187                                                 network->flags &=
1188                                                     ~NETWORK_HAS_CCK;
1189                                 }
1190                         }
1191
1192                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1193                                              rates_str, network->rates_len);
1194                         break;
1195
1196                 case MFIE_TYPE_RATES_EX:
1197 #ifdef CONFIG_IEEE80211_DEBUG
1198                         p = rates_str;
1199 #endif
1200                         network->rates_ex_len = min(info_element->len,
1201                                                     MAX_RATES_EX_LENGTH);
1202                         for (i = 0; i < network->rates_ex_len; i++) {
1203                                 network->rates_ex[i] = info_element->data[i];
1204 #ifdef CONFIG_IEEE80211_DEBUG
1205                                 p += snprintf(p, sizeof(rates_str) -
1206                                               (p - rates_str), "%02X ",
1207                                               network->rates[i]);
1208 #endif
1209                                 if (ieee80211_is_ofdm_rate
1210                                     (info_element->data[i])) {
1211                                         network->flags |= NETWORK_HAS_OFDM;
1212                                         if (info_element->data[i] &
1213                                             IEEE80211_BASIC_RATE_MASK)
1214                                                 network->flags &=
1215                                                     ~NETWORK_HAS_CCK;
1216                                 }
1217                         }
1218
1219                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1220                                              rates_str, network->rates_ex_len);
1221                         break;
1222
1223                 case MFIE_TYPE_DS_SET:
1224                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1225                                              info_element->data[0]);
1226                         network->channel = info_element->data[0];
1227                         break;
1228
1229                 case MFIE_TYPE_FH_SET:
1230                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1231                         break;
1232
1233                 case MFIE_TYPE_CF_SET:
1234                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1235                         break;
1236
1237                 case MFIE_TYPE_TIM:
1238                         network->tim.tim_count = info_element->data[0];
1239                         network->tim.tim_period = info_element->data[1];
1240                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
1241                         break;
1242
1243                 case MFIE_TYPE_ERP_INFO:
1244                         network->erp_value = info_element->data[0];
1245                         network->flags |= NETWORK_HAS_ERP_VALUE;
1246                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1247                                              network->erp_value);
1248                         break;
1249
1250                 case MFIE_TYPE_IBSS_SET:
1251                         network->atim_window = info_element->data[0];
1252                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1253                                              network->atim_window);
1254                         break;
1255
1256                 case MFIE_TYPE_CHALLENGE:
1257                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1258                         break;
1259
1260                 case MFIE_TYPE_GENERIC:
1261                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1262                                              info_element->len);
1263                         if (!ieee80211_parse_qos_info_param_IE(info_element,
1264                                                                network))
1265                                 break;
1266
1267                         if (info_element->len >= 4 &&
1268                             info_element->data[0] == 0x00 &&
1269                             info_element->data[1] == 0x50 &&
1270                             info_element->data[2] == 0xf2 &&
1271                             info_element->data[3] == 0x01) {
1272                                 network->wpa_ie_len = min(info_element->len + 2,
1273                                                           MAX_WPA_IE_LEN);
1274                                 memcpy(network->wpa_ie, info_element,
1275                                        network->wpa_ie_len);
1276                         }
1277                         break;
1278
1279                 case MFIE_TYPE_RSN:
1280                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
1281                                              info_element->len);
1282                         network->rsn_ie_len = min(info_element->len + 2,
1283                                                   MAX_WPA_IE_LEN);
1284                         memcpy(network->rsn_ie, info_element,
1285                                network->rsn_ie_len);
1286                         break;
1287
1288                 case MFIE_TYPE_QOS_PARAMETER:
1289                         printk(KERN_ERR
1290                                "QoS Error need to parse QOS_PARAMETER IE\n");
1291                         break;
1292                         /* 802.11h */
1293                 case MFIE_TYPE_POWER_CONSTRAINT:
1294                         network->power_constraint = info_element->data[0];
1295                         network->flags |= NETWORK_HAS_POWER_CONSTRAINT;
1296                         break;
1297
1298                 case MFIE_TYPE_CSA:
1299                         network->power_constraint = info_element->data[0];
1300                         network->flags |= NETWORK_HAS_CSA;
1301                         break;
1302
1303                 case MFIE_TYPE_QUIET:
1304                         network->quiet.count = info_element->data[0];
1305                         network->quiet.period = info_element->data[1];
1306                         network->quiet.duration = info_element->data[2];
1307                         network->quiet.offset = info_element->data[3];
1308                         network->flags |= NETWORK_HAS_QUIET;
1309                         break;
1310
1311                 case MFIE_TYPE_IBSS_DFS:
1312                         if (network->ibss_dfs)
1313                                 break;
1314                         network->ibss_dfs = kmemdup(info_element->data,
1315                                                     info_element->len,
1316                                                     GFP_ATOMIC);
1317                         if (!network->ibss_dfs)
1318                                 return 1;
1319                         network->flags |= NETWORK_HAS_IBSS_DFS;
1320                         break;
1321
1322                 case MFIE_TYPE_TPC_REPORT:
1323                         network->tpc_report.transmit_power =
1324                             info_element->data[0];
1325                         network->tpc_report.link_margin = info_element->data[1];
1326                         network->flags |= NETWORK_HAS_TPC_REPORT;
1327                         break;
1328
1329                 default:
1330                         IEEE80211_DEBUG_MGMT
1331                             ("Unsupported info element: %s (%d)\n",
1332                              get_info_element_string(info_element->id),
1333                              info_element->id);
1334                         break;
1335                 }
1336
1337                 length -= sizeof(*info_element) + info_element->len;
1338                 info_element =
1339                     (struct ieee80211_info_element *)&info_element->
1340                     data[info_element->len];
1341         }
1342
1343         return 0;
1344 }
1345
1346 static int ieee80211_handle_assoc_resp(struct ieee80211_device *ieee, struct ieee80211_assoc_response
1347                                        *frame, struct ieee80211_rx_stats *stats)
1348 {
1349         struct ieee80211_network network_resp = {
1350                 .ibss_dfs = NULL,
1351         };
1352         struct ieee80211_network *network = &network_resp;
1353         struct net_device *dev = ieee->dev;
1354
1355         network->flags = 0;
1356         network->qos_data.active = 0;
1357         network->qos_data.supported = 0;
1358         network->qos_data.param_count = 0;
1359         network->qos_data.old_param_count = 0;
1360
1361         //network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF);
1362         network->atim_window = le16_to_cpu(frame->aid);
1363         network->listen_interval = le16_to_cpu(frame->status);
1364         memcpy(network->bssid, frame->header.addr3, ETH_ALEN);
1365         network->capability = le16_to_cpu(frame->capability);
1366         network->last_scanned = jiffies;
1367         network->rates_len = network->rates_ex_len = 0;
1368         network->last_associate = 0;
1369         network->ssid_len = 0;
1370         network->erp_value =
1371             (network->capability & WLAN_CAPABILITY_IBSS) ? 0x3 : 0x0;
1372
1373         if (stats->freq == IEEE80211_52GHZ_BAND) {
1374                 /* for A band (No DS info) */
1375                 network->channel = stats->received_channel;
1376         } else
1377                 network->flags |= NETWORK_HAS_CCK;
1378
1379         network->wpa_ie_len = 0;
1380         network->rsn_ie_len = 0;
1381
1382         if (ieee80211_parse_info_param
1383             (frame->info_element, stats->len - sizeof(*frame), network))
1384                 return 1;
1385
1386         network->mode = 0;
1387         if (stats->freq == IEEE80211_52GHZ_BAND)
1388                 network->mode = IEEE_A;
1389         else {
1390                 if (network->flags & NETWORK_HAS_OFDM)
1391                         network->mode |= IEEE_G;
1392                 if (network->flags & NETWORK_HAS_CCK)
1393                         network->mode |= IEEE_B;
1394         }
1395
1396         if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
1397                 network->flags |= NETWORK_EMPTY_ESSID;
1398
1399         memcpy(&network->stats, stats, sizeof(network->stats));
1400
1401         if (ieee->handle_assoc_response != NULL)
1402                 ieee->handle_assoc_response(dev, frame, network);
1403
1404         return 0;
1405 }
1406
1407 /***************************************************/
1408
1409 static int ieee80211_network_init(struct ieee80211_device *ieee, struct ieee80211_probe_response
1410                                          *beacon,
1411                                          struct ieee80211_network *network,
1412                                          struct ieee80211_rx_stats *stats)
1413 {
1414         network->qos_data.active = 0;
1415         network->qos_data.supported = 0;
1416         network->qos_data.param_count = 0;
1417         network->qos_data.old_param_count = 0;
1418
1419         /* Pull out fixed field data */
1420         memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
1421         network->capability = le16_to_cpu(beacon->capability);
1422         network->last_scanned = jiffies;
1423         network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
1424         network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
1425         network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
1426         /* Where to pull this? beacon->listen_interval; */
1427         network->listen_interval = 0x0A;
1428         network->rates_len = network->rates_ex_len = 0;
1429         network->last_associate = 0;
1430         network->ssid_len = 0;
1431         network->flags = 0;
1432         network->atim_window = 0;
1433         network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
1434             0x3 : 0x0;
1435
1436         if (stats->freq == IEEE80211_52GHZ_BAND) {
1437                 /* for A band (No DS info) */
1438                 network->channel = stats->received_channel;
1439         } else
1440                 network->flags |= NETWORK_HAS_CCK;
1441
1442         network->wpa_ie_len = 0;
1443         network->rsn_ie_len = 0;
1444
1445         if (ieee80211_parse_info_param
1446             (beacon->info_element, stats->len - sizeof(*beacon), network))
1447                 return 1;
1448
1449         network->mode = 0;
1450         if (stats->freq == IEEE80211_52GHZ_BAND)
1451                 network->mode = IEEE_A;
1452         else {
1453                 if (network->flags & NETWORK_HAS_OFDM)
1454                         network->mode |= IEEE_G;
1455                 if (network->flags & NETWORK_HAS_CCK)
1456                         network->mode |= IEEE_B;
1457         }
1458
1459         if (network->mode == 0) {
1460                 IEEE80211_DEBUG_SCAN("Filtered out '%s (" MAC_FMT ")' "
1461                                      "network.\n",
1462                                      escape_essid(network->ssid,
1463                                                   network->ssid_len),
1464                                      MAC_ARG(network->bssid));
1465                 return 1;
1466         }
1467
1468         if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
1469                 network->flags |= NETWORK_EMPTY_ESSID;
1470
1471         memcpy(&network->stats, stats, sizeof(network->stats));
1472
1473         return 0;
1474 }
1475
1476 static inline int is_same_network(struct ieee80211_network *src,
1477                                   struct ieee80211_network *dst)
1478 {
1479         /* A network is only a duplicate if the channel, BSSID, and ESSID
1480          * all match.  We treat all <hidden> with the same BSSID and channel
1481          * as one network */
1482         return ((src->ssid_len == dst->ssid_len) &&
1483                 (src->channel == dst->channel) &&
1484                 !compare_ether_addr(src->bssid, dst->bssid) &&
1485                 !memcmp(src->ssid, dst->ssid, src->ssid_len));
1486 }
1487
1488 static void update_network(struct ieee80211_network *dst,
1489                                   struct ieee80211_network *src)
1490 {
1491         int qos_active;
1492         u8 old_param;
1493
1494         ieee80211_network_reset(dst);
1495         dst->ibss_dfs = src->ibss_dfs;
1496
1497         /* We only update the statistics if they were created by receiving
1498          * the network information on the actual channel the network is on.
1499          *
1500          * This keeps beacons received on neighbor channels from bringing
1501          * down the signal level of an AP. */
1502         if (dst->channel == src->stats.received_channel)
1503                 memcpy(&dst->stats, &src->stats,
1504                        sizeof(struct ieee80211_rx_stats));
1505         else
1506                 IEEE80211_DEBUG_SCAN("Network " MAC_FMT " info received "
1507                         "off channel (%d vs. %d)\n", MAC_ARG(src->bssid),
1508                         dst->channel, src->stats.received_channel);
1509
1510         dst->capability = src->capability;
1511         memcpy(dst->rates, src->rates, src->rates_len);
1512         dst->rates_len = src->rates_len;
1513         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
1514         dst->rates_ex_len = src->rates_ex_len;
1515
1516         dst->mode = src->mode;
1517         dst->flags = src->flags;
1518         dst->time_stamp[0] = src->time_stamp[0];
1519         dst->time_stamp[1] = src->time_stamp[1];
1520
1521         dst->beacon_interval = src->beacon_interval;
1522         dst->listen_interval = src->listen_interval;
1523         dst->atim_window = src->atim_window;
1524         dst->erp_value = src->erp_value;
1525         dst->tim = src->tim;
1526
1527         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
1528         dst->wpa_ie_len = src->wpa_ie_len;
1529         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
1530         dst->rsn_ie_len = src->rsn_ie_len;
1531
1532         dst->last_scanned = jiffies;
1533         qos_active = src->qos_data.active;
1534         old_param = dst->qos_data.old_param_count;
1535         if (dst->flags & NETWORK_HAS_QOS_MASK)
1536                 memcpy(&dst->qos_data, &src->qos_data,
1537                        sizeof(struct ieee80211_qos_data));
1538         else {
1539                 dst->qos_data.supported = src->qos_data.supported;
1540                 dst->qos_data.param_count = src->qos_data.param_count;
1541         }
1542
1543         if (dst->qos_data.supported == 1) {
1544                 if (dst->ssid_len)
1545                         IEEE80211_DEBUG_QOS
1546                             ("QoS the network %s is QoS supported\n",
1547                              dst->ssid);
1548                 else
1549                         IEEE80211_DEBUG_QOS
1550                             ("QoS the network is QoS supported\n");
1551         }
1552         dst->qos_data.active = qos_active;
1553         dst->qos_data.old_param_count = old_param;
1554
1555         /* dst->last_associate is not overwritten */
1556 }
1557
1558 static inline int is_beacon(__le16 fc)
1559 {
1560         return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
1561 }
1562
1563 static void ieee80211_process_probe_response(struct ieee80211_device
1564                                                     *ieee, struct
1565                                                     ieee80211_probe_response
1566                                                     *beacon, struct ieee80211_rx_stats
1567                                                     *stats)
1568 {
1569         struct net_device *dev = ieee->dev;
1570         struct ieee80211_network network = {
1571                 .ibss_dfs = NULL,
1572         };
1573         struct ieee80211_network *target;
1574         struct ieee80211_network *oldest = NULL;
1575 #ifdef CONFIG_IEEE80211_DEBUG
1576         struct ieee80211_info_element *info_element = beacon->info_element;
1577 #endif
1578         unsigned long flags;
1579
1580         IEEE80211_DEBUG_SCAN("'%s' (" MAC_FMT
1581                              "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1582                              escape_essid(info_element->data,
1583                                           info_element->len),
1584                              MAC_ARG(beacon->header.addr3),
1585                              (beacon->capability & (1 << 0xf)) ? '1' : '0',
1586                              (beacon->capability & (1 << 0xe)) ? '1' : '0',
1587                              (beacon->capability & (1 << 0xd)) ? '1' : '0',
1588                              (beacon->capability & (1 << 0xc)) ? '1' : '0',
1589                              (beacon->capability & (1 << 0xb)) ? '1' : '0',
1590                              (beacon->capability & (1 << 0xa)) ? '1' : '0',
1591                              (beacon->capability & (1 << 0x9)) ? '1' : '0',
1592                              (beacon->capability & (1 << 0x8)) ? '1' : '0',
1593                              (beacon->capability & (1 << 0x7)) ? '1' : '0',
1594                              (beacon->capability & (1 << 0x6)) ? '1' : '0',
1595                              (beacon->capability & (1 << 0x5)) ? '1' : '0',
1596                              (beacon->capability & (1 << 0x4)) ? '1' : '0',
1597                              (beacon->capability & (1 << 0x3)) ? '1' : '0',
1598                              (beacon->capability & (1 << 0x2)) ? '1' : '0',
1599                              (beacon->capability & (1 << 0x1)) ? '1' : '0',
1600                              (beacon->capability & (1 << 0x0)) ? '1' : '0');
1601
1602         if (ieee80211_network_init(ieee, beacon, &network, stats)) {
1603                 IEEE80211_DEBUG_SCAN("Dropped '%s' (" MAC_FMT ") via %s.\n",
1604                                      escape_essid(info_element->data,
1605                                                   info_element->len),
1606                                      MAC_ARG(beacon->header.addr3),
1607                                      is_beacon(beacon->header.frame_ctl) ?
1608                                      "BEACON" : "PROBE RESPONSE");
1609                 return;
1610         }
1611
1612         /* The network parsed correctly -- so now we scan our known networks
1613          * to see if we can find it in our list.
1614          *
1615          * NOTE:  This search is definitely not optimized.  Once its doing
1616          *        the "right thing" we'll optimize it for efficiency if
1617          *        necessary */
1618
1619         /* Search for this entry in the list and update it if it is
1620          * already there. */
1621
1622         spin_lock_irqsave(&ieee->lock, flags);
1623
1624         list_for_each_entry(target, &ieee->network_list, list) {
1625                 if (is_same_network(target, &network))
1626                         break;
1627
1628                 if ((oldest == NULL) ||
1629                     (target->last_scanned < oldest->last_scanned))
1630                         oldest = target;
1631         }
1632
1633         /* If we didn't find a match, then get a new network slot to initialize
1634          * with this beacon's information */
1635         if (&target->list == &ieee->network_list) {
1636                 if (list_empty(&ieee->network_free_list)) {
1637                         /* If there are no more slots, expire the oldest */
1638                         list_del(&oldest->list);
1639                         target = oldest;
1640                         IEEE80211_DEBUG_SCAN("Expired '%s' (" MAC_FMT ") from "
1641                                              "network list.\n",
1642                                              escape_essid(target->ssid,
1643                                                           target->ssid_len),
1644                                              MAC_ARG(target->bssid));
1645                         ieee80211_network_reset(target);
1646                 } else {
1647                         /* Otherwise just pull from the free list */
1648                         target = list_entry(ieee->network_free_list.next,
1649                                             struct ieee80211_network, list);
1650                         list_del(ieee->network_free_list.next);
1651                 }
1652
1653 #ifdef CONFIG_IEEE80211_DEBUG
1654                 IEEE80211_DEBUG_SCAN("Adding '%s' (" MAC_FMT ") via %s.\n",
1655                                      escape_essid(network.ssid,
1656                                                   network.ssid_len),
1657                                      MAC_ARG(network.bssid),
1658                                      is_beacon(beacon->header.frame_ctl) ?
1659                                      "BEACON" : "PROBE RESPONSE");
1660 #endif
1661                 memcpy(target, &network, sizeof(*target));
1662                 network.ibss_dfs = NULL;
1663                 list_add_tail(&target->list, &ieee->network_list);
1664         } else {
1665                 IEEE80211_DEBUG_SCAN("Updating '%s' (" MAC_FMT ") via %s.\n",
1666                                      escape_essid(target->ssid,
1667                                                   target->ssid_len),
1668                                      MAC_ARG(target->bssid),
1669                                      is_beacon(beacon->header.frame_ctl) ?
1670                                      "BEACON" : "PROBE RESPONSE");
1671                 update_network(target, &network);
1672                 network.ibss_dfs = NULL;
1673         }
1674
1675         spin_unlock_irqrestore(&ieee->lock, flags);
1676
1677         if (is_beacon(beacon->header.frame_ctl)) {
1678                 if (ieee->handle_beacon != NULL)
1679                         ieee->handle_beacon(dev, beacon, target);
1680         } else {
1681                 if (ieee->handle_probe_response != NULL)
1682                         ieee->handle_probe_response(dev, beacon, target);
1683         }
1684 }
1685
1686 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
1687                       struct ieee80211_hdr_4addr *header,
1688                       struct ieee80211_rx_stats *stats)
1689 {
1690         switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
1691         case IEEE80211_STYPE_ASSOC_RESP:
1692                 IEEE80211_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
1693                                      WLAN_FC_GET_STYPE(le16_to_cpu
1694                                                        (header->frame_ctl)));
1695                 ieee80211_handle_assoc_resp(ieee,
1696                                             (struct ieee80211_assoc_response *)
1697                                             header, stats);
1698                 break;
1699
1700         case IEEE80211_STYPE_REASSOC_RESP:
1701                 IEEE80211_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
1702                                      WLAN_FC_GET_STYPE(le16_to_cpu
1703                                                        (header->frame_ctl)));
1704                 break;
1705
1706         case IEEE80211_STYPE_PROBE_REQ:
1707                 IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1708                                      WLAN_FC_GET_STYPE(le16_to_cpu
1709                                                        (header->frame_ctl)));
1710
1711                 if (ieee->handle_probe_request != NULL)
1712                         ieee->handle_probe_request(ieee->dev,
1713                                                    (struct
1714                                                     ieee80211_probe_request *)
1715                                                    header, stats);
1716                 break;
1717
1718         case IEEE80211_STYPE_PROBE_RESP:
1719                 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1720                                      WLAN_FC_GET_STYPE(le16_to_cpu
1721                                                        (header->frame_ctl)));
1722                 IEEE80211_DEBUG_SCAN("Probe response\n");
1723                 ieee80211_process_probe_response(ieee,
1724                                                  (struct
1725                                                   ieee80211_probe_response *)
1726                                                  header, stats);
1727                 break;
1728
1729         case IEEE80211_STYPE_BEACON:
1730                 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
1731                                      WLAN_FC_GET_STYPE(le16_to_cpu
1732                                                        (header->frame_ctl)));
1733                 IEEE80211_DEBUG_SCAN("Beacon\n");
1734                 ieee80211_process_probe_response(ieee,
1735                                                  (struct
1736                                                   ieee80211_probe_response *)
1737                                                  header, stats);
1738                 break;
1739         case IEEE80211_STYPE_AUTH:
1740
1741                 IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1742                                      WLAN_FC_GET_STYPE(le16_to_cpu
1743                                                        (header->frame_ctl)));
1744
1745                 if (ieee->handle_auth != NULL)
1746                         ieee->handle_auth(ieee->dev,
1747                                           (struct ieee80211_auth *)header);
1748                 break;
1749
1750         case IEEE80211_STYPE_DISASSOC:
1751                 if (ieee->handle_disassoc != NULL)
1752                         ieee->handle_disassoc(ieee->dev,
1753                                               (struct ieee80211_disassoc *)
1754                                               header);
1755                 break;
1756
1757         case IEEE80211_STYPE_ACTION:
1758                 IEEE80211_DEBUG_MGMT("ACTION\n");
1759                 if (ieee->handle_action)
1760                         ieee->handle_action(ieee->dev,
1761                                             (struct ieee80211_action *)
1762                                             header, stats);
1763                 break;
1764
1765         case IEEE80211_STYPE_REASSOC_REQ:
1766                 IEEE80211_DEBUG_MGMT("received reassoc (%d)\n",
1767                                      WLAN_FC_GET_STYPE(le16_to_cpu
1768                                                        (header->frame_ctl)));
1769
1770                 IEEE80211_DEBUG_MGMT("%s: IEEE80211_REASSOC_REQ received\n",
1771                                      ieee->dev->name);
1772                 if (ieee->handle_reassoc_request != NULL)
1773                         ieee->handle_reassoc_request(ieee->dev,
1774                                                     (struct ieee80211_reassoc_request *)
1775                                                      header);
1776                 break;
1777
1778         case IEEE80211_STYPE_ASSOC_REQ:
1779                 IEEE80211_DEBUG_MGMT("received assoc (%d)\n",
1780                                      WLAN_FC_GET_STYPE(le16_to_cpu
1781                                                        (header->frame_ctl)));
1782
1783                 IEEE80211_DEBUG_MGMT("%s: IEEE80211_ASSOC_REQ received\n",
1784                                      ieee->dev->name);
1785                 if (ieee->handle_assoc_request != NULL)
1786                         ieee->handle_assoc_request(ieee->dev);
1787                 break;
1788
1789         case IEEE80211_STYPE_DEAUTH:
1790                 IEEE80211_DEBUG_MGMT("DEAUTH\n");
1791                 if (ieee->handle_deauth != NULL)
1792                         ieee->handle_deauth(ieee->dev,
1793                                             (struct ieee80211_deauth *)
1794                                             header);
1795                 break;
1796         default:
1797                 IEEE80211_DEBUG_MGMT("received UNKNOWN (%d)\n",
1798                                      WLAN_FC_GET_STYPE(le16_to_cpu
1799                                                        (header->frame_ctl)));
1800                 IEEE80211_DEBUG_MGMT("%s: Unknown management packet: %d\n",
1801                                      ieee->dev->name,
1802                                      WLAN_FC_GET_STYPE(le16_to_cpu
1803                                                        (header->frame_ctl)));
1804                 break;
1805         }
1806 }
1807
1808 EXPORT_SYMBOL_GPL(ieee80211_rx_any);
1809 EXPORT_SYMBOL(ieee80211_rx_mgt);
1810 EXPORT_SYMBOL(ieee80211_rx);