git.oblomov.eu Git - linux-2.6/blob - drivers/net/wireless/ipw2x00/libipw_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/lib80211.h>
  36 #include <net/ieee80211.h>
  37
  38 static void ieee80211_monitor_rx(struct ieee80211_device *ieee,
  39                                         struct sk_buff *skb,
  40                                         struct ieee80211_rx_stats *rx_stats)
  41 {
  42         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
  43         u16 fc = le16_to_cpu(hdr->frame_control);
  44
  45         skb->dev = ieee->dev;
  46         skb_reset_mac_header(skb);
  47         skb_pull(skb, ieee80211_get_hdrlen(fc));
  48         skb->pkt_type = PACKET_OTHERHOST;
  49         skb->protocol = htons(ETH_P_80211_RAW);
  50         memset(skb->cb, 0, sizeof(skb->cb));
  51         netif_rx(skb);
  52 }
  53
  54 /* Called only as a tasklet (software IRQ) */
  55 static struct ieee80211_frag_entry *ieee80211_frag_cache_find(struct
  56                                                               ieee80211_device
  57                                                               *ieee,
  58                                                               unsigned int seq,
  59                                                               unsigned int frag,
  60                                                               u8 * src,
  61                                                               u8 * dst)
  62 {
  63         struct ieee80211_frag_entry *entry;
  64         int i;
  65
  66         for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) {
  67                 entry = &ieee->frag_cache[i];
  68                 if (entry->skb != NULL &&
  69                     time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
  70                         IEEE80211_DEBUG_FRAG("expiring fragment cache entry "
  71                                              "seq=%u last_frag=%u\n",
  72                                              entry->seq, entry->last_frag);
  73                         dev_kfree_skb_any(entry->skb);
  74                         entry->skb = NULL;
  75                 }
  76
  77                 if (entry->skb != NULL && entry->seq == seq &&
  78                     (entry->last_frag + 1 == frag || frag == -1) &&
  79                     !compare_ether_addr(entry->src_addr, src) &&
  80                     !compare_ether_addr(entry->dst_addr, dst))
  81                         return entry;
  82         }
  83
  84         return NULL;
  85 }
  86
  87 /* Called only as a tasklet (software IRQ) */
  88 static struct sk_buff *ieee80211_frag_cache_get(struct ieee80211_device *ieee,
  89                                                 struct ieee80211_hdr_4addr *hdr)
  90 {
  91         struct sk_buff *skb = NULL;
  92         u16 sc;
  93         unsigned int frag, seq;
  94         struct ieee80211_frag_entry *entry;
  95
  96         sc = le16_to_cpu(hdr->seq_ctl);
  97         frag = WLAN_GET_SEQ_FRAG(sc);
  98         seq = WLAN_GET_SEQ_SEQ(sc);
  99
 100         if (frag == 0) {
 101                 /* Reserve enough space to fit maximum frame length */
 102                 skb = dev_alloc_skb(ieee->dev->mtu +
 103                                     sizeof(struct ieee80211_hdr_4addr) +
 104                                     8 /* LLC */  +
 105                                     2 /* alignment */  +
 106                                     8 /* WEP */  + ETH_ALEN /* WDS */ );
 107                 if (skb == NULL)
 108                         return NULL;
 109
 110                 entry = &ieee->frag_cache[ieee->frag_next_idx];
 111                 ieee->frag_next_idx++;
 112                 if (ieee->frag_next_idx >= IEEE80211_FRAG_CACHE_LEN)
 113                         ieee->frag_next_idx = 0;
 114
 115                 if (entry->skb != NULL)
 116                         dev_kfree_skb_any(entry->skb);
 117
 118                 entry->first_frag_time = jiffies;
 119                 entry->seq = seq;
 120                 entry->last_frag = frag;
 121                 entry->skb = skb;
 122                 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
 123                 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
 124         } else {
 125                 /* received a fragment of a frame for which the head fragment
 126                  * should have already been received */
 127                 entry = ieee80211_frag_cache_find(ieee, seq, frag, hdr->addr2,
 128                                                   hdr->addr1);
 129                 if (entry != NULL) {
 130                         entry->last_frag = frag;
 131                         skb = entry->skb;
 132                 }
 133         }
 134
 135         return skb;
 136 }
 137
 138 /* Called only as a tasklet (software IRQ) */
 139 static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee,
 140                                            struct ieee80211_hdr_4addr *hdr)
 141 {
 142         u16 sc;
 143         unsigned int seq;
 144         struct ieee80211_frag_entry *entry;
 145
 146         sc = le16_to_cpu(hdr->seq_ctl);
 147         seq = WLAN_GET_SEQ_SEQ(sc);
 148
 149         entry = ieee80211_frag_cache_find(ieee, seq, -1, hdr->addr2,
 150                                           hdr->addr1);
 151
 152         if (entry == NULL) {
 153                 IEEE80211_DEBUG_FRAG("could not invalidate fragment cache "
 154                                      "entry (seq=%u)\n", seq);
 155                 return -1;
 156         }
 157
 158         entry->skb = NULL;
 159         return 0;
 160 }
 161
 162 #ifdef NOT_YET
 163 /* ieee80211_rx_frame_mgtmt
 164  *
 165  * Responsible for handling management control frames
 166  *
 167  * Called by ieee80211_rx */
 168 static int
 169 ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb,
 170                         struct ieee80211_rx_stats *rx_stats, u16 type,
 171                         u16 stype)
 172 {
 173         if (ieee->iw_mode == IW_MODE_MASTER) {
 174                 printk(KERN_DEBUG "%s: Master mode not yet suppported.\n",
 175                        ieee->dev->name);
 176                 return 0;
 177 /*
 178   hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr_4addr *)
 179   skb->data);*/
 180         }
 181
 182         if (ieee->hostapd && type == WLAN_FC_TYPE_MGMT) {
 183                 if (stype == WLAN_FC_STYPE_BEACON &&
 184                     ieee->iw_mode == IW_MODE_MASTER) {
 185                         struct sk_buff *skb2;
 186                         /* Process beacon frames also in kernel driver to
 187                          * update STA(AP) table statistics */
 188                         skb2 = skb_clone(skb, GFP_ATOMIC);
 189                         if (skb2)
 190                                 hostap_rx(skb2->dev, skb2, rx_stats);
 191                 }
 192
 193                 /* send management frames to the user space daemon for
 194                  * processing */
 195                 ieee->apdevstats.rx_packets++;
 196                 ieee->apdevstats.rx_bytes += skb->len;
 197                 prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
 198                 return 0;
 199         }
 200
 201         if (ieee->iw_mode == IW_MODE_MASTER) {
 202                 if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
 203                         printk(KERN_DEBUG "%s: unknown management frame "
 204                                "(type=0x%02x, stype=0x%02x) dropped\n",
 205                                skb->dev->name, type, stype);
 206                         return -1;
 207                 }
 208
 209                 hostap_rx(skb->dev, skb, rx_stats);
 210                 return 0;
 211         }
 212
 213         printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame "
 214                "received in non-Host AP mode\n", skb->dev->name);
 215         return -1;
 216 }
 217 #endif
 218
 219 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
 220 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
 221 static unsigned char rfc1042_header[] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
 222
 223 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
 224 static unsigned char bridge_tunnel_header[] =
 225     { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
 226 /* No encapsulation header if EtherType < 0x600 (=length) */
 227
 228 /* Called by ieee80211_rx_frame_decrypt */
 229 static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee,
 230                                     struct sk_buff *skb)
 231 {
 232         struct net_device *dev = ieee->dev;
 233         u16 fc, ethertype;
 234         struct ieee80211_hdr_3addr *hdr;
 235         u8 *pos;
 236
 237         if (skb->len < 24)
 238                 return 0;
 239
 240         hdr = (struct ieee80211_hdr_3addr *)skb->data;
 241         fc = le16_to_cpu(hdr->frame_ctl);
 242
 243         /* check that the frame is unicast frame to us */
 244         if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 245             IEEE80211_FCTL_TODS &&
 246             !compare_ether_addr(hdr->addr1, dev->dev_addr) &&
 247             !compare_ether_addr(hdr->addr3, dev->dev_addr)) {
 248                 /* ToDS frame with own addr BSSID and DA */
 249         } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 250                    IEEE80211_FCTL_FROMDS &&
 251                    !compare_ether_addr(hdr->addr1, dev->dev_addr)) {
 252                 /* FromDS frame with own addr as DA */
 253         } else
 254                 return 0;
 255
 256         if (skb->len < 24 + 8)
 257                 return 0;
 258
 259         /* check for port access entity Ethernet type */
 260         pos = skb->data + 24;
 261         ethertype = (pos[6] << 8) | pos[7];
 262         if (ethertype == ETH_P_PAE)
 263                 return 1;
 264
 265         return 0;
 266 }
 267
 268 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
 269 static int
 270 ieee80211_rx_frame_decrypt(struct ieee80211_device *ieee, struct sk_buff *skb,
 271                            struct lib80211_crypt_data *crypt)
 272 {
 273         struct ieee80211_hdr_3addr *hdr;
 274         int res, hdrlen;
 275
 276         if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
 277                 return 0;
 278
 279         hdr = (struct ieee80211_hdr_3addr *)skb->data;
 280         hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 281
 282         atomic_inc(&crypt->refcnt);
 283         res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
 284         atomic_dec(&crypt->refcnt);
 285         if (res < 0) {
 286                 IEEE80211_DEBUG_DROP("decryption failed (SA=%pM) res=%d\n",
 287                                      hdr->addr2, res);
 288                 if (res == -2)
 289                         IEEE80211_DEBUG_DROP("Decryption failed ICV "
 290                                              "mismatch (key %d)\n",
 291                                              skb->data[hdrlen + 3] >> 6);
 292                 ieee->ieee_stats.rx_discards_undecryptable++;
 293                 return -1;
 294         }
 295
 296         return res;
 297 }
 298
 299 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
 300 static int
 301 ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device *ieee,
 302                                 struct sk_buff *skb, int keyidx,
 303                                 struct lib80211_crypt_data *crypt)
 304 {
 305         struct ieee80211_hdr_3addr *hdr;
 306         int res, hdrlen;
 307
 308         if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
 309                 return 0;
 310
 311         hdr = (struct ieee80211_hdr_3addr *)skb->data;
 312         hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 313
 314         atomic_inc(&crypt->refcnt);
 315         res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
 316         atomic_dec(&crypt->refcnt);
 317         if (res < 0) {
 318                 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
 319                        " (SA=%pM keyidx=%d)\n", ieee->dev->name, hdr->addr2,
 320                        keyidx);
 321                 return -1;
 322         }
 323
 324         return 0;
 325 }
 326
 327 /* All received frames are sent to this function. @skb contains the frame in
 328  * IEEE 802.11 format, i.e., in the format it was sent over air.
 329  * This function is called only as a tasklet (software IRQ). */
 330 int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
 331                  struct ieee80211_rx_stats *rx_stats)
 332 {
 333         struct net_device *dev = ieee->dev;
 334         struct ieee80211_hdr_4addr *hdr;
 335         size_t hdrlen;
 336         u16 fc, type, stype, sc;
 337         struct net_device_stats *stats;
 338         unsigned int frag;
 339         u8 *payload;
 340         u16 ethertype;
 341 #ifdef NOT_YET
 342         struct net_device *wds = NULL;
 343         struct sk_buff *skb2 = NULL;
 344         struct net_device *wds = NULL;
 345         int frame_authorized = 0;
 346         int from_assoc_ap = 0;
 347         void *sta = NULL;
 348 #endif
 349         u8 dst[ETH_ALEN];
 350         u8 src[ETH_ALEN];
 351         struct lib80211_crypt_data *crypt = NULL;
 352         int keyidx = 0;
 353         int can_be_decrypted = 0;
 354
 355         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 356         stats = &ieee->stats;
 357
 358         if (skb->len < 10) {
 359                 printk(KERN_INFO "%s: SKB length < 10\n", dev->name);
 360                 goto rx_dropped;
 361         }
 362
 363         fc = le16_to_cpu(hdr->frame_ctl);
 364         type = WLAN_FC_GET_TYPE(fc);
 365         stype = WLAN_FC_GET_STYPE(fc);
 366         sc = le16_to_cpu(hdr->seq_ctl);
 367         frag = WLAN_GET_SEQ_FRAG(sc);
 368         hdrlen = ieee80211_get_hdrlen(fc);
 369
 370         if (skb->len < hdrlen) {
 371                 printk(KERN_INFO "%s: invalid SKB length %d\n",
 372                         dev->name, skb->len);
 373                 goto rx_dropped;
 374         }
 375
 376         /* Put this code here so that we avoid duplicating it in all
 377          * Rx paths. - Jean II */
 378 #ifdef CONFIG_WIRELESS_EXT
 379 #ifdef IW_WIRELESS_SPY          /* defined in iw_handler.h */
 380         /* If spy monitoring on */
 381         if (ieee->spy_data.spy_number > 0) {
 382                 struct iw_quality wstats;
 383
 384                 wstats.updated = 0;
 385                 if (rx_stats->mask & IEEE80211_STATMASK_RSSI) {
 386                         wstats.level = rx_stats->signal;
 387                         wstats.updated |= IW_QUAL_LEVEL_UPDATED;
 388                 } else
 389                         wstats.updated |= IW_QUAL_LEVEL_INVALID;
 390
 391                 if (rx_stats->mask & IEEE80211_STATMASK_NOISE) {
 392                         wstats.noise = rx_stats->noise;
 393                         wstats.updated |= IW_QUAL_NOISE_UPDATED;
 394                 } else
 395                         wstats.updated |= IW_QUAL_NOISE_INVALID;
 396
 397                 if (rx_stats->mask & IEEE80211_STATMASK_SIGNAL) {
 398                         wstats.qual = rx_stats->signal;
 399                         wstats.updated |= IW_QUAL_QUAL_UPDATED;
 400                 } else
 401                         wstats.updated |= IW_QUAL_QUAL_INVALID;
 402
 403                 /* Update spy records */
 404                 wireless_spy_update(ieee->dev, hdr->addr2, &wstats);
 405         }
 406 #endif                          /* IW_WIRELESS_SPY */
 407 #endif                          /* CONFIG_WIRELESS_EXT */
 408
 409 #ifdef NOT_YET
 410         hostap_update_rx_stats(local->ap, hdr, rx_stats);
 411 #endif
 412
 413         if (ieee->iw_mode == IW_MODE_MONITOR) {
 414                 stats->rx_packets++;
 415                 stats->rx_bytes += skb->len;
 416                 ieee80211_monitor_rx(ieee, skb, rx_stats);
 417                 return 1;
 418         }
 419
 420         can_be_decrypted = (is_multicast_ether_addr(hdr->addr1) ||
 421                             is_broadcast_ether_addr(hdr->addr2)) ?
 422             ieee->host_mc_decrypt : ieee->host_decrypt;
 423
 424         if (can_be_decrypted) {
 425                 if (skb->len >= hdrlen + 3) {
 426                         /* Top two-bits of byte 3 are the key index */
 427                         keyidx = skb->data[hdrlen + 3] >> 6;
 428                 }
 429
 430                 /* ieee->crypt[] is WEP_KEY (4) in length.  Given that keyidx
 431                  * is only allowed 2-bits of storage, no value of keyidx can
 432                  * be provided via above code that would result in keyidx
 433                  * being out of range */
 434                 crypt = ieee->crypt_info.crypt[keyidx];
 435
 436 #ifdef NOT_YET
 437                 sta = NULL;
 438
 439                 /* Use station specific key to override default keys if the
 440                  * receiver address is a unicast address ("individual RA"). If
 441                  * bcrx_sta_key parameter is set, station specific key is used
 442                  * even with broad/multicast targets (this is against IEEE
 443                  * 802.11, but makes it easier to use different keys with
 444                  * stations that do not support WEP key mapping). */
 445
 446                 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
 447                         (void)hostap_handle_sta_crypto(local, hdr, &crypt,
 448                                                        &sta);
 449 #endif
 450
 451                 /* allow NULL decrypt to indicate an station specific override
 452                  * for default encryption */
 453                 if (crypt && (crypt->ops == NULL ||
 454                               crypt->ops->decrypt_mpdu == NULL))
 455                         crypt = NULL;
 456
 457                 if (!crypt && (fc & IEEE80211_FCTL_PROTECTED)) {
 458                         /* This seems to be triggered by some (multicast?)
 459                          * frames from other than current BSS, so just drop the
 460                          * frames silently instead of filling system log with
 461                          * these reports. */
 462                         IEEE80211_DEBUG_DROP("Decryption failed (not set)"
 463                                              " (SA=%pM)\n", 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 %pM\n", dev->name, hdr->addr2);
 475                         /* TODO: could inform hostapd about this so that it
 476                          * could send auth failure report */
 477                         goto rx_dropped;
 478                 }
 479
 480                 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
 481                         goto rx_dropped;
 482                 else
 483                         goto rx_exit;
 484         }
 485 #endif
 486         /* drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.29) */
 487         if (sc == ieee->prev_seq_ctl)
 488                 goto rx_dropped;
 489         else
 490                 ieee->prev_seq_ctl = sc;
 491
 492         /* Data frame - extract src/dst addresses */
 493         if (skb->len < IEEE80211_3ADDR_LEN)
 494                 goto rx_dropped;
 495
 496         switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
 497         case IEEE80211_FCTL_FROMDS:
 498                 memcpy(dst, hdr->addr1, ETH_ALEN);
 499                 memcpy(src, hdr->addr3, ETH_ALEN);
 500                 break;
 501         case IEEE80211_FCTL_TODS:
 502                 memcpy(dst, hdr->addr3, ETH_ALEN);
 503                 memcpy(src, hdr->addr2, ETH_ALEN);
 504                 break;
 505         case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
 506                 if (skb->len < IEEE80211_4ADDR_LEN)
 507                         goto rx_dropped;
 508                 memcpy(dst, hdr->addr3, ETH_ALEN);
 509                 memcpy(src, hdr->addr4, ETH_ALEN);
 510                 break;
 511         case 0:
 512                 memcpy(dst, hdr->addr1, ETH_ALEN);
 513                 memcpy(src, hdr->addr2, ETH_ALEN);
 514                 break;
 515         }
 516
 517 #ifdef NOT_YET
 518         if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
 519                 goto rx_dropped;
 520         if (wds) {
 521                 skb->dev = dev = wds;
 522                 stats = hostap_get_stats(dev);
 523         }
 524
 525         if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
 526             (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 527             IEEE80211_FCTL_FROMDS && ieee->stadev
 528             && !compare_ether_addr(hdr->addr2, ieee->assoc_ap_addr)) {
 529                 /* Frame from BSSID of the AP for which we are a client */
 530                 skb->dev = dev = ieee->stadev;
 531                 stats = hostap_get_stats(dev);
 532                 from_assoc_ap = 1;
 533         }
 534 #endif
 535
 536 #ifdef NOT_YET
 537         if ((ieee->iw_mode == IW_MODE_MASTER ||
 538              ieee->iw_mode == IW_MODE_REPEAT) && !from_assoc_ap) {
 539                 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
 540                                              wds != NULL)) {
 541                 case AP_RX_CONTINUE_NOT_AUTHORIZED:
 542                         frame_authorized = 0;
 543                         break;
 544                 case AP_RX_CONTINUE:
 545                         frame_authorized = 1;
 546                         break;
 547                 case AP_RX_DROP:
 548                         goto rx_dropped;
 549                 case AP_RX_EXIT:
 550                         goto rx_exit;
 551                 }
 552         }
 553 #endif
 554
 555         /* Nullfunc frames may have PS-bit set, so they must be passed to
 556          * hostap_handle_sta_rx() before being dropped here. */
 557
 558         stype &= ~IEEE80211_STYPE_QOS_DATA;
 559
 560         if (stype != IEEE80211_STYPE_DATA &&
 561             stype != IEEE80211_STYPE_DATA_CFACK &&
 562             stype != IEEE80211_STYPE_DATA_CFPOLL &&
 563             stype != IEEE80211_STYPE_DATA_CFACKPOLL) {
 564                 if (stype != IEEE80211_STYPE_NULLFUNC)
 565                         IEEE80211_DEBUG_DROP("RX: dropped data frame "
 566                                              "with no data (type=0x%02x, "
 567                                              "subtype=0x%02x, len=%d)\n",
 568                                              type, stype, skb->len);
 569                 goto rx_dropped;
 570         }
 571
 572         /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
 573
 574         if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 575             (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
 576                 goto rx_dropped;
 577
 578         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 579
 580         /* skb: hdr + (possibly fragmented) plaintext payload */
 581         // PR: FIXME: hostap has additional conditions in the "if" below:
 582         // ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
 583         if ((frag != 0) || (fc & IEEE80211_FCTL_MOREFRAGS)) {
 584                 int flen;
 585                 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
 586                 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
 587
 588                 if (!frag_skb) {
 589                         IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
 590                                         "Rx cannot get skb from fragment "
 591                                         "cache (morefrag=%d seq=%u frag=%u)\n",
 592                                         (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
 593                                         WLAN_GET_SEQ_SEQ(sc), frag);
 594                         goto rx_dropped;
 595                 }
 596
 597                 flen = skb->len;
 598                 if (frag != 0)
 599                         flen -= hdrlen;
 600
 601                 if (frag_skb->tail + flen > frag_skb->end) {
 602                         printk(KERN_WARNING "%s: host decrypted and "
 603                                "reassembled frame did not fit skb\n",
 604                                dev->name);
 605                         ieee80211_frag_cache_invalidate(ieee, hdr);
 606                         goto rx_dropped;
 607                 }
 608
 609                 if (frag == 0) {
 610                         /* copy first fragment (including full headers) into
 611                          * beginning of the fragment cache skb */
 612                         skb_copy_from_linear_data(skb, skb_put(frag_skb, flen), flen);
 613                 } else {
 614                         /* append frame payload to the end of the fragment
 615                          * cache skb */
 616                         skb_copy_from_linear_data_offset(skb, hdrlen,
 617                                       skb_put(frag_skb, flen), flen);
 618                 }
 619                 dev_kfree_skb_any(skb);
 620                 skb = NULL;
 621
 622                 if (fc & IEEE80211_FCTL_MOREFRAGS) {
 623                         /* more fragments expected - leave the skb in fragment
 624                          * cache for now; it will be delivered to upper layers
 625                          * after all fragments have been received */
 626                         goto rx_exit;
 627                 }
 628
 629                 /* this was the last fragment and the frame will be
 630                  * delivered, so remove skb from fragment cache */
 631                 skb = frag_skb;
 632                 hdr = (struct ieee80211_hdr_4addr *)skb->data;
 633                 ieee80211_frag_cache_invalidate(ieee, hdr);
 634         }
 635
 636         /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
 637          * encrypted/authenticated */
 638         if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 639             ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
 640                 goto rx_dropped;
 641
 642         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 643         if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) {
 644                 if (            /*ieee->ieee802_1x && */
 645                            ieee80211_is_eapol_frame(ieee, skb)) {
 646                         /* pass unencrypted EAPOL frames even if encryption is
 647                          * configured */
 648                 } else {
 649                         IEEE80211_DEBUG_DROP("encryption configured, but RX "
 650                                              "frame not encrypted (SA=%pM)\n",
 651                                              hdr->addr2);
 652                         goto rx_dropped;
 653                 }
 654         }
 655
 656         if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep &&
 657             !ieee80211_is_eapol_frame(ieee, skb)) {
 658                 IEEE80211_DEBUG_DROP("dropped unencrypted RX data "
 659                                      "frame from %pM (drop_unencrypted=1)\n",
 660                                      hdr->addr2);
 661                 goto rx_dropped;
 662         }
 663
 664         /* If the frame was decrypted in hardware, we may need to strip off
 665          * any security data (IV, ICV, etc) that was left behind */
 666         if (!can_be_decrypted && (fc & IEEE80211_FCTL_PROTECTED) &&
 667             ieee->host_strip_iv_icv) {
 668                 int trimlen = 0;
 669
 670                 /* Top two-bits of byte 3 are the key index */
 671                 if (skb->len >= hdrlen + 3)
 672                         keyidx = skb->data[hdrlen + 3] >> 6;
 673
 674                 /* To strip off any security data which appears before the
 675                  * payload, we simply increase hdrlen (as the header gets
 676                  * chopped off immediately below). For the security data which
 677                  * appears after the payload, we use skb_trim. */
 678
 679                 switch (ieee->sec.encode_alg[keyidx]) {
 680                 case SEC_ALG_WEP:
 681                         /* 4 byte IV */
 682                         hdrlen += 4;
 683                         /* 4 byte ICV */
 684                         trimlen = 4;
 685                         break;
 686                 case SEC_ALG_TKIP:
 687                         /* 4 byte IV, 4 byte ExtIV */
 688                         hdrlen += 8;
 689                         /* 8 byte MIC, 4 byte ICV */
 690                         trimlen = 12;
 691                         break;
 692                 case SEC_ALG_CCMP:
 693                         /* 8 byte CCMP header */
 694                         hdrlen += 8;
 695                         /* 8 byte MIC */
 696                         trimlen = 8;
 697                         break;
 698                 }
 699
 700                 if (skb->len < trimlen)
 701                         goto rx_dropped;
 702
 703                 __skb_trim(skb, skb->len - trimlen);
 704
 705                 if (skb->len < hdrlen)
 706                         goto rx_dropped;
 707         }
 708
 709         /* skb: hdr + (possible reassembled) full plaintext payload */
 710
 711         payload = skb->data + hdrlen;
 712         ethertype = (payload[6] << 8) | payload[7];
 713
 714 #ifdef NOT_YET
 715         /* If IEEE 802.1X is used, check whether the port is authorized to send
 716          * the received frame. */
 717         if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) {
 718                 if (ethertype == ETH_P_PAE) {
 719                         printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n",
 720                                dev->name);
 721                         if (ieee->hostapd && ieee->apdev) {
 722                                 /* Send IEEE 802.1X frames to the user
 723                                  * space daemon for processing */
 724                                 prism2_rx_80211(ieee->apdev, skb, rx_stats,
 725                                                 PRISM2_RX_MGMT);
 726                                 ieee->apdevstats.rx_packets++;
 727                                 ieee->apdevstats.rx_bytes += skb->len;
 728                                 goto rx_exit;
 729                         }
 730                 } else if (!frame_authorized) {
 731                         printk(KERN_DEBUG "%s: dropped frame from "
 732                                "unauthorized port (IEEE 802.1X): "
 733                                "ethertype=0x%04x\n", dev->name, ethertype);
 734                         goto rx_dropped;
 735                 }
 736         }
 737 #endif
 738
 739         /* convert hdr + possible LLC headers into Ethernet header */
 740         if (skb->len - hdrlen >= 8 &&
 741             ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 &&
 742               ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
 743              memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) {
 744                 /* remove RFC1042 or Bridge-Tunnel encapsulation and
 745                  * replace EtherType */
 746                 skb_pull(skb, hdrlen + SNAP_SIZE);
 747                 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 748                 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 749         } else {
 750                 __be16 len;
 751                 /* Leave Ethernet header part of hdr and full payload */
 752                 skb_pull(skb, hdrlen);
 753                 len = htons(skb->len);
 754                 memcpy(skb_push(skb, 2), &len, 2);
 755                 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 756                 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 757         }
 758
 759 #ifdef NOT_YET
 760         if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 761                     IEEE80211_FCTL_TODS) && skb->len >= ETH_HLEN + ETH_ALEN) {
 762                 /* Non-standard frame: get addr4 from its bogus location after
 763                  * the payload */
 764                 skb_copy_to_linear_data_offset(skb, ETH_ALEN,
 765                                                skb->data + skb->len - ETH_ALEN,
 766                                                ETH_ALEN);
 767                 skb_trim(skb, skb->len - ETH_ALEN);
 768         }
 769 #endif
 770
 771         stats->rx_packets++;
 772         stats->rx_bytes += skb->len;
 773
 774 #ifdef NOT_YET
 775         if (ieee->iw_mode == IW_MODE_MASTER && !wds && ieee->ap->bridge_packets) {
 776                 if (dst[0] & 0x01) {
 777                         /* copy multicast frame both to the higher layers and
 778                          * to the wireless media */
 779                         ieee->ap->bridged_multicast++;
 780                         skb2 = skb_clone(skb, GFP_ATOMIC);
 781                         if (skb2 == NULL)
 782                                 printk(KERN_DEBUG "%s: skb_clone failed for "
 783                                        "multicast frame\n", dev->name);
 784                 } else if (hostap_is_sta_assoc(ieee->ap, dst)) {
 785                         /* send frame directly to the associated STA using
 786                          * wireless media and not passing to higher layers */
 787                         ieee->ap->bridged_unicast++;
 788                         skb2 = skb;
 789                         skb = NULL;
 790                 }
 791         }
 792
 793         if (skb2 != NULL) {
 794                 /* send to wireless media */
 795                 skb2->dev = dev;
 796                 skb2->protocol = htons(ETH_P_802_3);
 797                 skb_reset_mac_header(skb2);
 798                 skb_reset_network_header(skb2);
 799                 /* skb2->network_header += ETH_HLEN; */
 800                 dev_queue_xmit(skb2);
 801         }
 802 #endif
 803
 804         if (skb) {
 805                 skb->protocol = eth_type_trans(skb, dev);
 806                 memset(skb->cb, 0, sizeof(skb->cb));
 807                 skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
 808                 if (netif_rx(skb) == NET_RX_DROP) {
 809                         /* netif_rx always succeeds, but it might drop
 810                          * the packet.  If it drops the packet, we log that
 811                          * in our stats. */
 812                         IEEE80211_DEBUG_DROP
 813                             ("RX: netif_rx dropped the packet\n");
 814                         stats->rx_dropped++;
 815                 }
 816         }
 817
 818       rx_exit:
 819 #ifdef NOT_YET
 820         if (sta)
 821                 hostap_handle_sta_release(sta);
 822 #endif
 823         return 1;
 824
 825       rx_dropped:
 826         stats->rx_dropped++;
 827
 828         /* Returning 0 indicates to caller that we have not handled the SKB--
 829          * so it is still allocated and can be used again by underlying
 830          * hardware as a DMA target */
 831         return 0;
 832 }
 833
 834 /* Filter out unrelated packets, call ieee80211_rx[_mgt]
 835  * This function takes over the skb, it should not be used again after calling
 836  * this function. */
 837 void ieee80211_rx_any(struct ieee80211_device *ieee,
 838                      struct sk_buff *skb, struct ieee80211_rx_stats *stats)
 839 {
 840         struct ieee80211_hdr_4addr *hdr;
 841         int is_packet_for_us;
 842         u16 fc;
 843
 844         if (ieee->iw_mode == IW_MODE_MONITOR) {
 845                 if (!ieee80211_rx(ieee, skb, stats))
 846                         dev_kfree_skb_irq(skb);
 847                 return;
 848         }
 849
 850         if (skb->len < sizeof(struct ieee80211_hdr))
 851                 goto drop_free;
 852
 853         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 854         fc = le16_to_cpu(hdr->frame_ctl);
 855
 856         if ((fc & IEEE80211_FCTL_VERS) != 0)
 857                 goto drop_free;
 858
 859         switch (fc & IEEE80211_FCTL_FTYPE) {
 860         case IEEE80211_FTYPE_MGMT:
 861                 if (skb->len < sizeof(struct ieee80211_hdr_3addr))
 862                         goto drop_free;
 863                 ieee80211_rx_mgt(ieee, hdr, stats);
 864                 dev_kfree_skb_irq(skb);
 865                 return;
 866         case IEEE80211_FTYPE_DATA:
 867                 break;
 868         case IEEE80211_FTYPE_CTL:
 869                 return;
 870         default:
 871                 return;
 872         }
 873
 874         is_packet_for_us = 0;
 875         switch (ieee->iw_mode) {
 876         case IW_MODE_ADHOC:
 877                 /* our BSS and not from/to DS */
 878                 if (memcmp(hdr->addr3, ieee->bssid, ETH_ALEN) == 0)
 879                 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == 0) {
 880                         /* promisc: get all */
 881                         if (ieee->dev->flags & IFF_PROMISC)
 882                                 is_packet_for_us = 1;
 883                         /* to us */
 884                         else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
 885                                 is_packet_for_us = 1;
 886                         /* mcast */
 887                         else if (is_multicast_ether_addr(hdr->addr1))
 888                                 is_packet_for_us = 1;
 889                 }
 890                 break;
 891         case IW_MODE_INFRA:
 892                 /* our BSS (== from our AP) and from DS */
 893                 if (memcmp(hdr->addr2, ieee->bssid, ETH_ALEN) == 0)
 894                 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS) {
 895                         /* promisc: get all */
 896                         if (ieee->dev->flags & IFF_PROMISC)
 897                                 is_packet_for_us = 1;
 898                         /* to us */
 899                         else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
 900                                 is_packet_for_us = 1;
 901                         /* mcast */
 902                         else if (is_multicast_ether_addr(hdr->addr1)) {
 903                                 /* not our own packet bcasted from AP */
 904                                 if (memcmp(hdr->addr3, ieee->dev->dev_addr, ETH_ALEN))
 905                                         is_packet_for_us = 1;
 906                         }
 907                 }
 908                 break;
 909         default:
 910                 /* ? */
 911                 break;
 912         }
 913
 914         if (is_packet_for_us)
 915                 if (!ieee80211_rx(ieee, skb, stats))
 916                         dev_kfree_skb_irq(skb);
 917         return;
 918
 919 drop_free:
 920         dev_kfree_skb_irq(skb);
 921         ieee->stats.rx_dropped++;
 922         return;
 923 }
 924
 925 #define MGMT_FRAME_FIXED_PART_LENGTH            0x24
 926
 927 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
 928
 929 /*
 930 * Make ther structure we read from the beacon packet has
 931 * the right values
 932 */
 933 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
 934                                      *info_element, int sub_type)
 935 {
 936
 937         if (info_element->qui_subtype != sub_type)
 938                 return -1;
 939         if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
 940                 return -1;
 941         if (info_element->qui_type != QOS_OUI_TYPE)
 942                 return -1;
 943         if (info_element->version != QOS_VERSION_1)
 944                 return -1;
 945
 946         return 0;
 947 }
 948
 949 /*
 950  * Parse a QoS parameter element
 951  */
 952 static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
 953                                             *element_param, struct ieee80211_info_element
 954                                             *info_element)
 955 {
 956         int ret = 0;
 957         u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2;
 958
 959         if ((info_element == NULL) || (element_param == NULL))
 960                 return -1;
 961
 962         if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
 963                 memcpy(element_param->info_element.qui, info_element->data,
 964                        info_element->len);
 965                 element_param->info_element.elementID = info_element->id;
 966                 element_param->info_element.length = info_element->len;
 967         } else
 968                 ret = -1;
 969         if (ret == 0)
 970                 ret = ieee80211_verify_qos_info(&element_param->info_element,
 971                                                 QOS_OUI_PARAM_SUB_TYPE);
 972         return ret;
 973 }
 974
 975 /*
 976  * Parse a QoS information element
 977  */
 978 static int ieee80211_read_qos_info_element(struct
 979                                            ieee80211_qos_information_element
 980                                            *element_info, struct ieee80211_info_element
 981                                            *info_element)
 982 {
 983         int ret = 0;
 984         u16 size = sizeof(struct ieee80211_qos_information_element) - 2;
 985
 986         if (element_info == NULL)
 987                 return -1;
 988         if (info_element == NULL)
 989                 return -1;
 990
 991         if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
 992                 memcpy(element_info->qui, info_element->data,
 993                        info_element->len);
 994                 element_info->elementID = info_element->id;
 995                 element_info->length = info_element->len;
 996         } else
 997                 ret = -1;
 998
 999         if (ret == 0)
1000                 ret = ieee80211_verify_qos_info(element_info,
1001                                                 QOS_OUI_INFO_SUB_TYPE);
1002         return ret;
1003 }
1004
1005 /*
1006  * Write QoS parameters from the ac parameters.
1007  */
1008 static int ieee80211_qos_convert_ac_to_parameters(struct
1009                                                   ieee80211_qos_parameter_info
1010                                                   *param_elm, struct
1011                                                   ieee80211_qos_parameters
1012                                                   *qos_param)
1013 {
1014         int rc = 0;
1015         int i;
1016         struct ieee80211_qos_ac_parameter *ac_params;
1017         u32 txop;
1018         u8 cw_min;
1019         u8 cw_max;
1020
1021         for (i = 0; i < QOS_QUEUE_NUM; i++) {
1022                 ac_params = &(param_elm->ac_params_record[i]);
1023
1024                 qos_param->aifs[i] = (ac_params->aci_aifsn) & 0x0F;
1025                 qos_param->aifs[i] -= (qos_param->aifs[i] < 2) ? 0 : 2;
1026
1027                 cw_min = ac_params->ecw_min_max & 0x0F;
1028                 qos_param->cw_min[i] = cpu_to_le16((1 << cw_min) - 1);
1029
1030                 cw_max = (ac_params->ecw_min_max & 0xF0) >> 4;
1031                 qos_param->cw_max[i] = cpu_to_le16((1 << cw_max) - 1);
1032
1033                 qos_param->flag[i] =
1034                     (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1035
1036                 txop = le16_to_cpu(ac_params->tx_op_limit) * 32;
1037                 qos_param->tx_op_limit[i] = cpu_to_le16(txop);
1038         }
1039         return rc;
1040 }
1041
1042 /*
1043  * we have a generic data element which it may contain QoS information or
1044  * parameters element. check the information element length to decide
1045  * which type to read
1046  */
1047 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
1048                                              *info_element,
1049                                              struct ieee80211_network *network)
1050 {
1051         int rc = 0;
1052         struct ieee80211_qos_parameters *qos_param = NULL;
1053         struct ieee80211_qos_information_element qos_info_element;
1054
1055         rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);
1056
1057         if (rc == 0) {
1058                 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1059                 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1060         } else {
1061                 struct ieee80211_qos_parameter_info param_element;
1062
1063                 rc = ieee80211_read_qos_param_element(&param_element,
1064                                                       info_element);
1065                 if (rc == 0) {
1066                         qos_param = &(network->qos_data.parameters);
1067                         ieee80211_qos_convert_ac_to_parameters(&param_element,
1068                                                                qos_param);
1069                         network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1070                         network->qos_data.param_count =
1071                             param_element.info_element.ac_info & 0x0F;
1072                 }
1073         }
1074
1075         if (rc == 0) {
1076                 IEEE80211_DEBUG_QOS("QoS is supported\n");
1077                 network->qos_data.supported = 1;
1078         }
1079         return rc;
1080 }
1081
1082 #ifdef CONFIG_IEEE80211_DEBUG
1083 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1084
1085 static const char *get_info_element_string(u16 id)
1086 {
1087         switch (id) {
1088                 MFIE_STRING(SSID);
1089                 MFIE_STRING(RATES);
1090                 MFIE_STRING(FH_SET);
1091                 MFIE_STRING(DS_SET);
1092                 MFIE_STRING(CF_SET);
1093                 MFIE_STRING(TIM);
1094                 MFIE_STRING(IBSS_SET);
1095                 MFIE_STRING(COUNTRY);
1096                 MFIE_STRING(HOP_PARAMS);
1097                 MFIE_STRING(HOP_TABLE);
1098                 MFIE_STRING(REQUEST);
1099                 MFIE_STRING(CHALLENGE);
1100                 MFIE_STRING(POWER_CONSTRAINT);
1101                 MFIE_STRING(POWER_CAPABILITY);
1102                 MFIE_STRING(TPC_REQUEST);
1103                 MFIE_STRING(TPC_REPORT);
1104                 MFIE_STRING(SUPP_CHANNELS);
1105                 MFIE_STRING(CSA);
1106                 MFIE_STRING(MEASURE_REQUEST);
1107                 MFIE_STRING(MEASURE_REPORT);
1108                 MFIE_STRING(QUIET);
1109                 MFIE_STRING(IBSS_DFS);
1110                 MFIE_STRING(ERP_INFO);
1111                 MFIE_STRING(RSN);
1112                 MFIE_STRING(RATES_EX);
1113                 MFIE_STRING(GENERIC);
1114                 MFIE_STRING(QOS_PARAMETER);
1115         default:
1116                 return "UNKNOWN";
1117         }
1118 }
1119 #endif
1120
1121 static int ieee80211_parse_info_param(struct ieee80211_info_element
1122                                       *info_element, u16 length,
1123                                       struct ieee80211_network *network)
1124 {
1125         DECLARE_SSID_BUF(ssid);
1126         u8 i;
1127 #ifdef CONFIG_IEEE80211_DEBUG
1128         char rates_str[64];
1129         char *p;
1130 #endif
1131
1132         while (length >= sizeof(*info_element)) {
1133                 if (sizeof(*info_element) + info_element->len > length) {
1134                         IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
1135                                              "info_element->len + 2 > left : "
1136                                              "info_element->len+2=%zd left=%d, id=%d.\n",
1137                                              info_element->len +
1138                                              sizeof(*info_element),
1139                                              length, info_element->id);
1140                         /* We stop processing but don't return an error here
1141                          * because some misbehaviour APs break this rule. ie.
1142                          * Orinoco AP1000. */
1143                         break;
1144                 }
1145
1146                 switch (info_element->id) {
1147                 case MFIE_TYPE_SSID:
1148                         network->ssid_len = min(info_element->len,
1149                                                 (u8) IW_ESSID_MAX_SIZE);
1150                         memcpy(network->ssid, info_element->data,
1151                                network->ssid_len);
1152                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
1153                                 memset(network->ssid + network->ssid_len, 0,
1154                                        IW_ESSID_MAX_SIZE - network->ssid_len);
1155
1156                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1157                                              print_ssid(ssid, network->ssid,
1158                                                         network->ssid_len),
1159                                              network->ssid_len);
1160                         break;
1161
1162                 case MFIE_TYPE_RATES:
1163 #ifdef CONFIG_IEEE80211_DEBUG
1164                         p = rates_str;
1165 #endif
1166                         network->rates_len = min(info_element->len,
1167                                                  MAX_RATES_LENGTH);
1168                         for (i = 0; i < network->rates_len; i++) {
1169                                 network->rates[i] = info_element->data[i];
1170 #ifdef CONFIG_IEEE80211_DEBUG
1171                                 p += snprintf(p, sizeof(rates_str) -
1172                                               (p - rates_str), "%02X ",
1173                                               network->rates[i]);
1174 #endif
1175                                 if (ieee80211_is_ofdm_rate
1176                                     (info_element->data[i])) {
1177                                         network->flags |= NETWORK_HAS_OFDM;
1178                                         if (info_element->data[i] &
1179                                             IEEE80211_BASIC_RATE_MASK)
1180                                                 network->flags &=
1181                                                     ~NETWORK_HAS_CCK;
1182                                 }
1183                         }
1184
1185                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1186                                              rates_str, network->rates_len);
1187                         break;
1188
1189                 case MFIE_TYPE_RATES_EX:
1190 #ifdef CONFIG_IEEE80211_DEBUG
1191                         p = rates_str;
1192 #endif
1193                         network->rates_ex_len = min(info_element->len,
1194                                                     MAX_RATES_EX_LENGTH);
1195                         for (i = 0; i < network->rates_ex_len; i++) {
1196                                 network->rates_ex[i] = info_element->data[i];
1197 #ifdef CONFIG_IEEE80211_DEBUG
1198                                 p += snprintf(p, sizeof(rates_str) -
1199                                               (p - rates_str), "%02X ",
1200                                               network->rates[i]);
1201 #endif
1202                                 if (ieee80211_is_ofdm_rate
1203                                     (info_element->data[i])) {
1204                                         network->flags |= NETWORK_HAS_OFDM;
1205                                         if (info_element->data[i] &
1206                                             IEEE80211_BASIC_RATE_MASK)
1207                                                 network->flags &=
1208                                                     ~NETWORK_HAS_CCK;
1209                                 }
1210                         }
1211
1212                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1213                                              rates_str, network->rates_ex_len);
1214                         break;
1215
1216                 case MFIE_TYPE_DS_SET:
1217                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1218                                              info_element->data[0]);
1219                         network->channel = info_element->data[0];
1220                         break;
1221
1222                 case MFIE_TYPE_FH_SET:
1223                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1224                         break;
1225
1226                 case MFIE_TYPE_CF_SET:
1227                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1228                         break;
1229
1230                 case MFIE_TYPE_TIM:
1231                         network->tim.tim_count = info_element->data[0];
1232                         network->tim.tim_period = info_element->data[1];
1233                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
1234                         break;
1235
1236                 case MFIE_TYPE_ERP_INFO:
1237                         network->erp_value = info_element->data[0];
1238                         network->flags |= NETWORK_HAS_ERP_VALUE;
1239                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1240                                              network->erp_value);
1241                         break;
1242
1243                 case MFIE_TYPE_IBSS_SET:
1244                         network->atim_window = info_element->data[0];
1245                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1246                                              network->atim_window);
1247                         break;
1248
1249                 case MFIE_TYPE_CHALLENGE:
1250                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1251                         break;
1252
1253                 case MFIE_TYPE_GENERIC:
1254                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1255                                              info_element->len);
1256                         if (!ieee80211_parse_qos_info_param_IE(info_element,
1257                                                                network))
1258                                 break;
1259
1260                         if (info_element->len >= 4 &&
1261                             info_element->data[0] == 0x00 &&
1262                             info_element->data[1] == 0x50 &&
1263                             info_element->data[2] == 0xf2 &&
1264                             info_element->data[3] == 0x01) {
1265                                 network->wpa_ie_len = min(info_element->len + 2,
1266                                                           MAX_WPA_IE_LEN);
1267                                 memcpy(network->wpa_ie, info_element,
1268                                        network->wpa_ie_len);
1269                         }
1270                         break;
1271
1272                 case MFIE_TYPE_RSN:
1273                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
1274                                              info_element->len);
1275                         network->rsn_ie_len = min(info_element->len + 2,
1276                                                   MAX_WPA_IE_LEN);
1277                         memcpy(network->rsn_ie, info_element,
1278                                network->rsn_ie_len);
1279                         break;
1280
1281                 case MFIE_TYPE_QOS_PARAMETER:
1282                         printk(KERN_ERR
1283                                "QoS Error need to parse QOS_PARAMETER IE\n");
1284                         break;
1285                         /* 802.11h */
1286                 case MFIE_TYPE_POWER_CONSTRAINT:
1287                         network->power_constraint = info_element->data[0];
1288                         network->flags |= NETWORK_HAS_POWER_CONSTRAINT;
1289                         break;
1290
1291                 case MFIE_TYPE_CSA:
1292                         network->power_constraint = info_element->data[0];
1293                         network->flags |= NETWORK_HAS_CSA;
1294                         break;
1295
1296                 case MFIE_TYPE_QUIET:
1297                         network->quiet.count = info_element->data[0];
1298                         network->quiet.period = info_element->data[1];
1299                         network->quiet.duration = info_element->data[2];
1300                         network->quiet.offset = info_element->data[3];
1301                         network->flags |= NETWORK_HAS_QUIET;
1302                         break;
1303
1304                 case MFIE_TYPE_IBSS_DFS:
1305                         if (network->ibss_dfs)
1306                                 break;
1307                         network->ibss_dfs = kmemdup(info_element->data,
1308                                                     info_element->len,
1309                                                     GFP_ATOMIC);
1310                         if (!network->ibss_dfs)
1311                                 return 1;
1312                         network->flags |= NETWORK_HAS_IBSS_DFS;
1313                         break;
1314
1315                 case MFIE_TYPE_TPC_REPORT:
1316                         network->tpc_report.transmit_power =
1317                             info_element->data[0];
1318                         network->tpc_report.link_margin = info_element->data[1];
1319                         network->flags |= NETWORK_HAS_TPC_REPORT;
1320                         break;
1321
1322                 default:
1323                         IEEE80211_DEBUG_MGMT
1324                             ("Unsupported info element: %s (%d)\n",
1325                              get_info_element_string(info_element->id),
1326                              info_element->id);
1327                         break;
1328                 }
1329
1330                 length -= sizeof(*info_element) + info_element->len;
1331                 info_element =
1332                     (struct ieee80211_info_element *)&info_element->
1333                     data[info_element->len];
1334         }
1335
1336         return 0;
1337 }
1338
1339 static int ieee80211_handle_assoc_resp(struct ieee80211_device *ieee, struct ieee80211_assoc_response
1340                                        *frame, struct ieee80211_rx_stats *stats)
1341 {
1342         struct ieee80211_network network_resp = {
1343                 .ibss_dfs = NULL,
1344         };
1345         struct ieee80211_network *network = &network_resp;
1346         struct net_device *dev = ieee->dev;
1347
1348         network->flags = 0;
1349         network->qos_data.active = 0;
1350         network->qos_data.supported = 0;
1351         network->qos_data.param_count = 0;
1352         network->qos_data.old_param_count = 0;
1353
1354         //network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF);
1355         network->atim_window = le16_to_cpu(frame->aid);
1356         network->listen_interval = le16_to_cpu(frame->status);
1357         memcpy(network->bssid, frame->header.addr3, ETH_ALEN);
1358         network->capability = le16_to_cpu(frame->capability);
1359         network->last_scanned = jiffies;
1360         network->rates_len = network->rates_ex_len = 0;
1361         network->last_associate = 0;
1362         network->ssid_len = 0;
1363         network->erp_value =
1364             (network->capability & WLAN_CAPABILITY_IBSS) ? 0x3 : 0x0;
1365
1366         if (stats->freq == IEEE80211_52GHZ_BAND) {
1367                 /* for A band (No DS info) */
1368                 network->channel = stats->received_channel;
1369         } else
1370                 network->flags |= NETWORK_HAS_CCK;
1371
1372         network->wpa_ie_len = 0;
1373         network->rsn_ie_len = 0;
1374
1375         if (ieee80211_parse_info_param
1376             (frame->info_element, stats->len - sizeof(*frame), network))
1377                 return 1;
1378
1379         network->mode = 0;
1380         if (stats->freq == IEEE80211_52GHZ_BAND)
1381                 network->mode = IEEE_A;
1382         else {
1383                 if (network->flags & NETWORK_HAS_OFDM)
1384                         network->mode |= IEEE_G;
1385                 if (network->flags & NETWORK_HAS_CCK)
1386                         network->mode |= IEEE_B;
1387         }
1388
1389         memcpy(&network->stats, stats, sizeof(network->stats));
1390
1391         if (ieee->handle_assoc_response != NULL)
1392                 ieee->handle_assoc_response(dev, frame, network);
1393
1394         return 0;
1395 }
1396
1397 /***************************************************/
1398
1399 static int ieee80211_network_init(struct ieee80211_device *ieee, struct ieee80211_probe_response
1400                                          *beacon,
1401                                          struct ieee80211_network *network,
1402                                          struct ieee80211_rx_stats *stats)
1403 {
1404         DECLARE_SSID_BUF(ssid);
1405
1406         network->qos_data.active = 0;
1407         network->qos_data.supported = 0;
1408         network->qos_data.param_count = 0;
1409         network->qos_data.old_param_count = 0;
1410
1411         /* Pull out fixed field data */
1412         memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
1413         network->capability = le16_to_cpu(beacon->capability);
1414         network->last_scanned = jiffies;
1415         network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
1416         network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
1417         network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
1418         /* Where to pull this? beacon->listen_interval; */
1419         network->listen_interval = 0x0A;
1420         network->rates_len = network->rates_ex_len = 0;
1421         network->last_associate = 0;
1422         network->ssid_len = 0;
1423         network->flags = 0;
1424         network->atim_window = 0;
1425         network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
1426             0x3 : 0x0;
1427
1428         if (stats->freq == IEEE80211_52GHZ_BAND) {
1429                 /* for A band (No DS info) */
1430                 network->channel = stats->received_channel;
1431         } else
1432                 network->flags |= NETWORK_HAS_CCK;
1433
1434         network->wpa_ie_len = 0;
1435         network->rsn_ie_len = 0;
1436
1437         if (ieee80211_parse_info_param
1438             (beacon->info_element, stats->len - sizeof(*beacon), network))
1439                 return 1;
1440
1441         network->mode = 0;
1442         if (stats->freq == IEEE80211_52GHZ_BAND)
1443                 network->mode = IEEE_A;
1444         else {
1445                 if (network->flags & NETWORK_HAS_OFDM)
1446                         network->mode |= IEEE_G;
1447                 if (network->flags & NETWORK_HAS_CCK)
1448                         network->mode |= IEEE_B;
1449         }
1450
1451         if (network->mode == 0) {
1452                 IEEE80211_DEBUG_SCAN("Filtered out '%s (%pM)' "
1453                                      "network.\n",
1454                                      print_ssid(ssid, network->ssid,
1455                                                  network->ssid_len),
1456                                      network->bssid);
1457                 return 1;
1458         }
1459
1460         memcpy(&network->stats, stats, sizeof(network->stats));
1461
1462         return 0;
1463 }
1464
1465 static inline int is_same_network(struct ieee80211_network *src,
1466                                   struct ieee80211_network *dst)
1467 {
1468         /* A network is only a duplicate if the channel, BSSID, and ESSID
1469          * all match.  We treat all <hidden> with the same BSSID and channel
1470          * as one network */
1471         return ((src->ssid_len == dst->ssid_len) &&
1472                 (src->channel == dst->channel) &&
1473                 !compare_ether_addr(src->bssid, dst->bssid) &&
1474                 !memcmp(src->ssid, dst->ssid, src->ssid_len));
1475 }
1476
1477 static void update_network(struct ieee80211_network *dst,
1478                                   struct ieee80211_network *src)
1479 {
1480         int qos_active;
1481         u8 old_param;
1482
1483         ieee80211_network_reset(dst);
1484         dst->ibss_dfs = src->ibss_dfs;
1485
1486         /* We only update the statistics if they were created by receiving
1487          * the network information on the actual channel the network is on.
1488          *
1489          * This keeps beacons received on neighbor channels from bringing
1490          * down the signal level of an AP. */
1491         if (dst->channel == src->stats.received_channel)
1492                 memcpy(&dst->stats, &src->stats,
1493                        sizeof(struct ieee80211_rx_stats));
1494         else
1495                 IEEE80211_DEBUG_SCAN("Network %pM info received "
1496                         "off channel (%d vs. %d)\n", src->bssid,
1497                         dst->channel, src->stats.received_channel);
1498
1499         dst->capability = src->capability;
1500         memcpy(dst->rates, src->rates, src->rates_len);
1501         dst->rates_len = src->rates_len;
1502         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
1503         dst->rates_ex_len = src->rates_ex_len;
1504
1505         dst->mode = src->mode;
1506         dst->flags = src->flags;
1507         dst->time_stamp[0] = src->time_stamp[0];
1508         dst->time_stamp[1] = src->time_stamp[1];
1509
1510         dst->beacon_interval = src->beacon_interval;
1511         dst->listen_interval = src->listen_interval;
1512         dst->atim_window = src->atim_window;
1513         dst->erp_value = src->erp_value;
1514         dst->tim = src->tim;
1515
1516         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
1517         dst->wpa_ie_len = src->wpa_ie_len;
1518         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
1519         dst->rsn_ie_len = src->rsn_ie_len;
1520
1521         dst->last_scanned = jiffies;
1522         qos_active = src->qos_data.active;
1523         old_param = dst->qos_data.old_param_count;
1524         if (dst->flags & NETWORK_HAS_QOS_MASK)
1525                 memcpy(&dst->qos_data, &src->qos_data,
1526                        sizeof(struct ieee80211_qos_data));
1527         else {
1528                 dst->qos_data.supported = src->qos_data.supported;
1529                 dst->qos_data.param_count = src->qos_data.param_count;
1530         }
1531
1532         if (dst->qos_data.supported == 1) {
1533                 if (dst->ssid_len)
1534                         IEEE80211_DEBUG_QOS
1535                             ("QoS the network %s is QoS supported\n",
1536                              dst->ssid);
1537                 else
1538                         IEEE80211_DEBUG_QOS
1539                             ("QoS the network is QoS supported\n");
1540         }
1541         dst->qos_data.active = qos_active;
1542         dst->qos_data.old_param_count = old_param;
1543
1544         /* dst->last_associate is not overwritten */
1545 }
1546
1547 static inline int is_beacon(__le16 fc)
1548 {
1549         return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
1550 }
1551
1552 static void ieee80211_process_probe_response(struct ieee80211_device
1553                                                     *ieee, struct
1554                                                     ieee80211_probe_response
1555                                                     *beacon, struct ieee80211_rx_stats
1556                                                     *stats)
1557 {
1558         struct net_device *dev = ieee->dev;
1559         struct ieee80211_network network = {
1560                 .ibss_dfs = NULL,
1561         };
1562         struct ieee80211_network *target;
1563         struct ieee80211_network *oldest = NULL;
1564 #ifdef CONFIG_IEEE80211_DEBUG
1565         struct ieee80211_info_element *info_element = beacon->info_element;
1566 #endif
1567         unsigned long flags;
1568         DECLARE_SSID_BUF(ssid);
1569
1570         IEEE80211_DEBUG_SCAN("'%s' (%pM"
1571                      "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1572                      print_ssid(ssid, info_element->data, info_element->len),
1573                      beacon->header.addr3,
1574                      (beacon->capability & cpu_to_le16(1 << 0xf)) ? '1' : '0',
1575                      (beacon->capability & cpu_to_le16(1 << 0xe)) ? '1' : '0',
1576                      (beacon->capability & cpu_to_le16(1 << 0xd)) ? '1' : '0',
1577                      (beacon->capability & cpu_to_le16(1 << 0xc)) ? '1' : '0',
1578                      (beacon->capability & cpu_to_le16(1 << 0xb)) ? '1' : '0',
1579                      (beacon->capability & cpu_to_le16(1 << 0xa)) ? '1' : '0',
1580                      (beacon->capability & cpu_to_le16(1 << 0x9)) ? '1' : '0',
1581                      (beacon->capability & cpu_to_le16(1 << 0x8)) ? '1' : '0',
1582                      (beacon->capability & cpu_to_le16(1 << 0x7)) ? '1' : '0',
1583                      (beacon->capability & cpu_to_le16(1 << 0x6)) ? '1' : '0',
1584                      (beacon->capability & cpu_to_le16(1 << 0x5)) ? '1' : '0',
1585                      (beacon->capability & cpu_to_le16(1 << 0x4)) ? '1' : '0',
1586                      (beacon->capability & cpu_to_le16(1 << 0x3)) ? '1' : '0',
1587                      (beacon->capability & cpu_to_le16(1 << 0x2)) ? '1' : '0',
1588                      (beacon->capability & cpu_to_le16(1 << 0x1)) ? '1' : '0',
1589                      (beacon->capability & cpu_to_le16(1 << 0x0)) ? '1' : '0');
1590
1591         if (ieee80211_network_init(ieee, beacon, &network, stats)) {
1592                 IEEE80211_DEBUG_SCAN("Dropped '%s' (%pM) via %s.\n",
1593                                      print_ssid(ssid, info_element->data,
1594                                                  info_element->len),
1595                                      beacon->header.addr3,
1596                                      is_beacon(beacon->header.frame_ctl) ?
1597                                      "BEACON" : "PROBE RESPONSE");
1598                 return;
1599         }
1600
1601         /* The network parsed correctly -- so now we scan our known networks
1602          * to see if we can find it in our list.
1603          *
1604          * NOTE:  This search is definitely not optimized.  Once its doing
1605          *        the "right thing" we'll optimize it for efficiency if
1606          *        necessary */
1607
1608         /* Search for this entry in the list and update it if it is
1609          * already there. */
1610
1611         spin_lock_irqsave(&ieee->lock, flags);
1612
1613         list_for_each_entry(target, &ieee->network_list, list) {
1614                 if (is_same_network(target, &network))
1615                         break;
1616
1617                 if ((oldest == NULL) ||
1618                     (target->last_scanned < oldest->last_scanned))
1619                         oldest = target;
1620         }
1621
1622         /* If we didn't find a match, then get a new network slot to initialize
1623          * with this beacon's information */
1624         if (&target->list == &ieee->network_list) {
1625                 if (list_empty(&ieee->network_free_list)) {
1626                         /* If there are no more slots, expire the oldest */
1627                         list_del(&oldest->list);
1628                         target = oldest;
1629                         IEEE80211_DEBUG_SCAN("Expired '%s' (%pM) from "
1630                                              "network list.\n",
1631                                              print_ssid(ssid, target->ssid,
1632                                                          target->ssid_len),
1633                                              target->bssid);
1634                         ieee80211_network_reset(target);
1635                 } else {
1636                         /* Otherwise just pull from the free list */
1637                         target = list_entry(ieee->network_free_list.next,
1638                                             struct ieee80211_network, list);
1639                         list_del(ieee->network_free_list.next);
1640                 }
1641
1642 #ifdef CONFIG_IEEE80211_DEBUG
1643                 IEEE80211_DEBUG_SCAN("Adding '%s' (%pM) via %s.\n",
1644                                      print_ssid(ssid, network.ssid,
1645                                                  network.ssid_len),
1646                                      network.bssid,
1647                                      is_beacon(beacon->header.frame_ctl) ?
1648                                      "BEACON" : "PROBE RESPONSE");
1649 #endif
1650                 memcpy(target, &network, sizeof(*target));
1651                 network.ibss_dfs = NULL;
1652                 list_add_tail(&target->list, &ieee->network_list);
1653         } else {
1654                 IEEE80211_DEBUG_SCAN("Updating '%s' (%pM) via %s.\n",
1655                                      print_ssid(ssid, target->ssid,
1656                                                  target->ssid_len),
1657                                      target->bssid,
1658                                      is_beacon(beacon->header.frame_ctl) ?
1659                                      "BEACON" : "PROBE RESPONSE");
1660                 update_network(target, &network);
1661                 network.ibss_dfs = NULL;
1662         }
1663
1664         spin_unlock_irqrestore(&ieee->lock, flags);
1665
1666         if (is_beacon(beacon->header.frame_ctl)) {
1667                 if (ieee->handle_beacon != NULL)
1668                         ieee->handle_beacon(dev, beacon, target);
1669         } else {
1670                 if (ieee->handle_probe_response != NULL)
1671                         ieee->handle_probe_response(dev, beacon, target);
1672         }
1673 }
1674
1675 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
1676                       struct ieee80211_hdr_4addr *header,
1677                       struct ieee80211_rx_stats *stats)
1678 {
1679         switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
1680         case IEEE80211_STYPE_ASSOC_RESP:
1681                 IEEE80211_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
1682                                      WLAN_FC_GET_STYPE(le16_to_cpu
1683                                                        (header->frame_ctl)));
1684                 ieee80211_handle_assoc_resp(ieee,
1685                                             (struct ieee80211_assoc_response *)
1686                                             header, stats);
1687                 break;
1688
1689         case IEEE80211_STYPE_REASSOC_RESP:
1690                 IEEE80211_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
1691                                      WLAN_FC_GET_STYPE(le16_to_cpu
1692                                                        (header->frame_ctl)));
1693                 break;
1694
1695         case IEEE80211_STYPE_PROBE_REQ:
1696                 IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1697                                      WLAN_FC_GET_STYPE(le16_to_cpu
1698                                                        (header->frame_ctl)));
1699
1700                 if (ieee->handle_probe_request != NULL)
1701                         ieee->handle_probe_request(ieee->dev,
1702                                                    (struct
1703                                                     ieee80211_probe_request *)
1704                                                    header, stats);
1705                 break;
1706
1707         case IEEE80211_STYPE_PROBE_RESP:
1708                 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1709                                      WLAN_FC_GET_STYPE(le16_to_cpu
1710                                                        (header->frame_ctl)));
1711                 IEEE80211_DEBUG_SCAN("Probe response\n");
1712                 ieee80211_process_probe_response(ieee,
1713                                                  (struct
1714                                                   ieee80211_probe_response *)
1715                                                  header, stats);
1716                 break;
1717
1718         case IEEE80211_STYPE_BEACON:
1719                 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
1720                                      WLAN_FC_GET_STYPE(le16_to_cpu
1721                                                        (header->frame_ctl)));
1722                 IEEE80211_DEBUG_SCAN("Beacon\n");
1723                 ieee80211_process_probe_response(ieee,
1724                                                  (struct
1725                                                   ieee80211_probe_response *)
1726                                                  header, stats);
1727                 break;
1728         case IEEE80211_STYPE_AUTH:
1729
1730                 IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1731                                      WLAN_FC_GET_STYPE(le16_to_cpu
1732                                                        (header->frame_ctl)));
1733
1734                 if (ieee->handle_auth != NULL)
1735                         ieee->handle_auth(ieee->dev,
1736                                           (struct ieee80211_auth *)header);
1737                 break;
1738
1739         case IEEE80211_STYPE_DISASSOC:
1740                 if (ieee->handle_disassoc != NULL)
1741                         ieee->handle_disassoc(ieee->dev,
1742                                               (struct ieee80211_disassoc *)
1743                                               header);
1744                 break;
1745
1746         case IEEE80211_STYPE_ACTION:
1747                 IEEE80211_DEBUG_MGMT("ACTION\n");
1748                 if (ieee->handle_action)
1749                         ieee->handle_action(ieee->dev,
1750                                             (struct ieee80211_action *)
1751                                             header, stats);
1752                 break;
1753
1754         case IEEE80211_STYPE_REASSOC_REQ:
1755                 IEEE80211_DEBUG_MGMT("received reassoc (%d)\n",
1756                                      WLAN_FC_GET_STYPE(le16_to_cpu
1757                                                        (header->frame_ctl)));
1758
1759                 IEEE80211_DEBUG_MGMT("%s: IEEE80211_REASSOC_REQ received\n",
1760                                      ieee->dev->name);
1761                 if (ieee->handle_reassoc_request != NULL)
1762                         ieee->handle_reassoc_request(ieee->dev,
1763                                                     (struct ieee80211_reassoc_request *)
1764                                                      header);
1765                 break;
1766
1767         case IEEE80211_STYPE_ASSOC_REQ:
1768                 IEEE80211_DEBUG_MGMT("received assoc (%d)\n",
1769                                      WLAN_FC_GET_STYPE(le16_to_cpu
1770                                                        (header->frame_ctl)));
1771
1772                 IEEE80211_DEBUG_MGMT("%s: IEEE80211_ASSOC_REQ received\n",
1773                                      ieee->dev->name);
1774                 if (ieee->handle_assoc_request != NULL)
1775                         ieee->handle_assoc_request(ieee->dev);
1776                 break;
1777
1778         case IEEE80211_STYPE_DEAUTH:
1779                 IEEE80211_DEBUG_MGMT("DEAUTH\n");
1780                 if (ieee->handle_deauth != NULL)
1781                         ieee->handle_deauth(ieee->dev,
1782                                             (struct ieee80211_deauth *)
1783                                             header);
1784                 break;
1785         default:
1786                 IEEE80211_DEBUG_MGMT("received UNKNOWN (%d)\n",
1787                                      WLAN_FC_GET_STYPE(le16_to_cpu
1788                                                        (header->frame_ctl)));
1789                 IEEE80211_DEBUG_MGMT("%s: Unknown management packet: %d\n",
1790                                      ieee->dev->name,
1791                                      WLAN_FC_GET_STYPE(le16_to_cpu
1792                                                        (header->frame_ctl)));
1793                 break;
1794         }
1795 }
1796
1797 EXPORT_SYMBOL_GPL(ieee80211_rx_any);
1798 EXPORT_SYMBOL(ieee80211_rx_mgt);
1799 EXPORT_SYMBOL(ieee80211_rx);