git.oblomov.eu Git - linux-2.6/blob - net/ieee80211/ieee80211_rx.c

   1 /*
   2  * Original code based Host AP (software wireless LAN access point) driver
   3  * for Intersil Prism2/2.5/3 - hostap.o module, common routines
   4  *
   5  * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   6  * <jkmaline@cc.hut.fi>
   7  * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
   8  * Copyright (c) 2004-2005, Intel Corporation
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation. See README and COPYING for
  13  * more details.
  14  */
  15
  16 #include <linux/compiler.h>
  17 #include <linux/config.h>
  18 #include <linux/errno.h>
  19 #include <linux/if_arp.h>
  20 #include <linux/in6.h>
  21 #include <linux/in.h>
  22 #include <linux/ip.h>
  23 #include <linux/kernel.h>
  24 #include <linux/module.h>
  25 #include <linux/netdevice.h>
  26 #include <linux/proc_fs.h>
  27 #include <linux/skbuff.h>
  28 #include <linux/slab.h>
  29 #include <linux/tcp.h>
  30 #include <linux/types.h>
  31 #include <linux/wireless.h>
  32 #include <linux/etherdevice.h>
  33 #include <asm/uaccess.h>
  34 #include <linux/ctype.h>
  35
  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_ctl);
  44
  45         skb->dev = ieee->dev;
  46         skb->mac.raw = skb->data;
  47         skb_pull(skb, ieee80211_get_hdrlen(fc));
  48         skb->pkt_type = PACKET_OTHERHOST;
  49         skb->protocol = __constant_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 ieee80211_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=" MAC_FMT
 287                                      ") res=%d\n", MAC_ARG(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 ieee80211_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=" MAC_FMT " keyidx=%d)\n",
 320                        ieee->dev->name, MAC_ARG(hdr->addr2), 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 ieee80211_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         /* Put this code here so that we avoid duplicating it in all
 371          * Rx paths. - Jean II */
 372 #ifdef CONFIG_WIRELESS_EXT
 373 #ifdef IW_WIRELESS_SPY          /* defined in iw_handler.h */
 374         /* If spy monitoring on */
 375         if (ieee->spy_data.spy_number > 0) {
 376                 struct iw_quality wstats;
 377
 378                 wstats.updated = 0;
 379                 if (rx_stats->mask & IEEE80211_STATMASK_RSSI) {
 380                         wstats.level = rx_stats->rssi;
 381                         wstats.updated |= IW_QUAL_LEVEL_UPDATED;
 382                 } else
 383                         wstats.updated |= IW_QUAL_LEVEL_INVALID;
 384
 385                 if (rx_stats->mask & IEEE80211_STATMASK_NOISE) {
 386                         wstats.noise = rx_stats->noise;
 387                         wstats.updated |= IW_QUAL_NOISE_UPDATED;
 388                 } else
 389                         wstats.updated |= IW_QUAL_NOISE_INVALID;
 390
 391                 if (rx_stats->mask & IEEE80211_STATMASK_SIGNAL) {
 392                         wstats.qual = rx_stats->signal;
 393                         wstats.updated |= IW_QUAL_QUAL_UPDATED;
 394                 } else
 395                         wstats.updated |= IW_QUAL_QUAL_INVALID;
 396
 397                 /* Update spy records */
 398                 wireless_spy_update(ieee->dev, hdr->addr2, &wstats);
 399         }
 400 #endif                          /* IW_WIRELESS_SPY */
 401 #endif                          /* CONFIG_WIRELESS_EXT */
 402
 403 #ifdef NOT_YET
 404         hostap_update_rx_stats(local->ap, hdr, rx_stats);
 405 #endif
 406
 407         if (ieee->iw_mode == IW_MODE_MONITOR) {
 408                 ieee80211_monitor_rx(ieee, skb, rx_stats);
 409                 stats->rx_packets++;
 410                 stats->rx_bytes += skb->len;
 411                 return 1;
 412         }
 413
 414         can_be_decrypted = (is_multicast_ether_addr(hdr->addr1) ||
 415                             is_broadcast_ether_addr(hdr->addr2)) ?
 416             ieee->host_mc_decrypt : ieee->host_decrypt;
 417
 418         if (can_be_decrypted) {
 419                 int idx = 0;
 420                 if (skb->len >= hdrlen + 3) {
 421                         /* Top two-bits of byte 3 are the key index */
 422                         idx = skb->data[hdrlen + 3] >> 6;
 423                 }
 424
 425                 /* ieee->crypt[] is WEP_KEY (4) in length.  Given that idx
 426                  * is only allowed 2-bits of storage, no value of idx can
 427                  * be provided via above code that would result in idx
 428                  * being out of range */
 429                 crypt = ieee->crypt[idx];
 430
 431 #ifdef NOT_YET
 432                 sta = NULL;
 433
 434                 /* Use station specific key to override default keys if the
 435                  * receiver address is a unicast address ("individual RA"). If
 436                  * bcrx_sta_key parameter is set, station specific key is used
 437                  * even with broad/multicast targets (this is against IEEE
 438                  * 802.11, but makes it easier to use different keys with
 439                  * stations that do not support WEP key mapping). */
 440
 441                 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
 442                         (void)hostap_handle_sta_crypto(local, hdr, &crypt,
 443                                                        &sta);
 444 #endif
 445
 446                 /* allow NULL decrypt to indicate an station specific override
 447                  * for default encryption */
 448                 if (crypt && (crypt->ops == NULL ||
 449                               crypt->ops->decrypt_mpdu == NULL))
 450                         crypt = NULL;
 451
 452                 if (!crypt && (fc & IEEE80211_FCTL_PROTECTED)) {
 453                         /* This seems to be triggered by some (multicast?)
 454                          * frames from other than current BSS, so just drop the
 455                          * frames silently instead of filling system log with
 456                          * these reports. */
 457                         IEEE80211_DEBUG_DROP("Decryption failed (not set)"
 458                                              " (SA=" MAC_FMT ")\n",
 459                                              MAC_ARG(hdr->addr2));
 460                         ieee->ieee_stats.rx_discards_undecryptable++;
 461                         goto rx_dropped;
 462                 }
 463         }
 464 #ifdef NOT_YET
 465         if (type != WLAN_FC_TYPE_DATA) {
 466                 if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_AUTH &&
 467                     fc & IEEE80211_FCTL_PROTECTED && ieee->host_decrypt &&
 468                     (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0) {
 469                         printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
 470                                "from " MAC_FMT "\n", dev->name,
 471                                MAC_ARG(hdr->addr2));
 472                         /* TODO: could inform hostapd about this so that it
 473                          * could send auth failure report */
 474                         goto rx_dropped;
 475                 }
 476
 477                 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
 478                         goto rx_dropped;
 479                 else
 480                         goto rx_exit;
 481         }
 482 #endif
 483
 484         /* Data frame - extract src/dst addresses */
 485         if (skb->len < IEEE80211_3ADDR_LEN)
 486                 goto rx_dropped;
 487
 488         switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
 489         case IEEE80211_FCTL_FROMDS:
 490                 memcpy(dst, hdr->addr1, ETH_ALEN);
 491                 memcpy(src, hdr->addr3, ETH_ALEN);
 492                 break;
 493         case IEEE80211_FCTL_TODS:
 494                 memcpy(dst, hdr->addr3, ETH_ALEN);
 495                 memcpy(src, hdr->addr2, ETH_ALEN);
 496                 break;
 497         case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
 498                 if (skb->len < IEEE80211_4ADDR_LEN)
 499                         goto rx_dropped;
 500                 memcpy(dst, hdr->addr3, ETH_ALEN);
 501                 memcpy(src, hdr->addr4, ETH_ALEN);
 502                 break;
 503         case 0:
 504                 memcpy(dst, hdr->addr1, ETH_ALEN);
 505                 memcpy(src, hdr->addr2, ETH_ALEN);
 506                 break;
 507         }
 508
 509 #ifdef NOT_YET
 510         if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
 511                 goto rx_dropped;
 512         if (wds) {
 513                 skb->dev = dev = wds;
 514                 stats = hostap_get_stats(dev);
 515         }
 516
 517         if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
 518             (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 519             IEEE80211_FCTL_FROMDS && ieee->stadev
 520             && !compare_ether_addr(hdr->addr2, ieee->assoc_ap_addr)) {
 521                 /* Frame from BSSID of the AP for which we are a client */
 522                 skb->dev = dev = ieee->stadev;
 523                 stats = hostap_get_stats(dev);
 524                 from_assoc_ap = 1;
 525         }
 526 #endif
 527
 528         dev->last_rx = jiffies;
 529
 530 #ifdef NOT_YET
 531         if ((ieee->iw_mode == IW_MODE_MASTER ||
 532              ieee->iw_mode == IW_MODE_REPEAT) && !from_assoc_ap) {
 533                 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
 534                                              wds != NULL)) {
 535                 case AP_RX_CONTINUE_NOT_AUTHORIZED:
 536                         frame_authorized = 0;
 537                         break;
 538                 case AP_RX_CONTINUE:
 539                         frame_authorized = 1;
 540                         break;
 541                 case AP_RX_DROP:
 542                         goto rx_dropped;
 543                 case AP_RX_EXIT:
 544                         goto rx_exit;
 545                 }
 546         }
 547 #endif
 548
 549         /* Nullfunc frames may have PS-bit set, so they must be passed to
 550          * hostap_handle_sta_rx() before being dropped here. */
 551
 552         stype &= ~IEEE80211_STYPE_QOS_DATA;
 553
 554         if (stype != IEEE80211_STYPE_DATA &&
 555             stype != IEEE80211_STYPE_DATA_CFACK &&
 556             stype != IEEE80211_STYPE_DATA_CFPOLL &&
 557             stype != IEEE80211_STYPE_DATA_CFACKPOLL) {
 558                 if (stype != IEEE80211_STYPE_NULLFUNC)
 559                         IEEE80211_DEBUG_DROP("RX: dropped data frame "
 560                                              "with no data (type=0x%02x, "
 561                                              "subtype=0x%02x, len=%d)\n",
 562                                              type, stype, skb->len);
 563                 goto rx_dropped;
 564         }
 565
 566         /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
 567
 568         if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 569             (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
 570                 goto rx_dropped;
 571
 572         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 573
 574         /* skb: hdr + (possibly fragmented) plaintext payload */
 575         // PR: FIXME: hostap has additional conditions in the "if" below:
 576         // ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
 577         if ((frag != 0) || (fc & IEEE80211_FCTL_MOREFRAGS)) {
 578                 int flen;
 579                 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
 580                 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
 581
 582                 if (!frag_skb) {
 583                         IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
 584                                         "Rx cannot get skb from fragment "
 585                                         "cache (morefrag=%d seq=%u frag=%u)\n",
 586                                         (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
 587                                         WLAN_GET_SEQ_SEQ(sc), frag);
 588                         goto rx_dropped;
 589                 }
 590
 591                 flen = skb->len;
 592                 if (frag != 0)
 593                         flen -= hdrlen;
 594
 595                 if (frag_skb->tail + flen > frag_skb->end) {
 596                         printk(KERN_WARNING "%s: host decrypted and "
 597                                "reassembled frame did not fit skb\n",
 598                                dev->name);
 599                         ieee80211_frag_cache_invalidate(ieee, hdr);
 600                         goto rx_dropped;
 601                 }
 602
 603                 if (frag == 0) {
 604                         /* copy first fragment (including full headers) into
 605                          * beginning of the fragment cache skb */
 606                         memcpy(skb_put(frag_skb, flen), skb->data, flen);
 607                 } else {
 608                         /* append frame payload to the end of the fragment
 609                          * cache skb */
 610                         memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
 611                                flen);
 612                 }
 613                 dev_kfree_skb_any(skb);
 614                 skb = NULL;
 615
 616                 if (fc & IEEE80211_FCTL_MOREFRAGS) {
 617                         /* more fragments expected - leave the skb in fragment
 618                          * cache for now; it will be delivered to upper layers
 619                          * after all fragments have been received */
 620                         goto rx_exit;
 621                 }
 622
 623                 /* this was the last fragment and the frame will be
 624                  * delivered, so remove skb from fragment cache */
 625                 skb = frag_skb;
 626                 hdr = (struct ieee80211_hdr_4addr *)skb->data;
 627                 ieee80211_frag_cache_invalidate(ieee, hdr);
 628         }
 629
 630         /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
 631          * encrypted/authenticated */
 632         if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 633             ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
 634                 goto rx_dropped;
 635
 636         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 637         if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) {
 638                 if (            /*ieee->ieee802_1x && */
 639                            ieee80211_is_eapol_frame(ieee, skb)) {
 640                         /* pass unencrypted EAPOL frames even if encryption is
 641                          * configured */
 642                 } else {
 643                         IEEE80211_DEBUG_DROP("encryption configured, but RX "
 644                                              "frame not encrypted (SA=" MAC_FMT
 645                                              ")\n", MAC_ARG(hdr->addr2));
 646                         goto rx_dropped;
 647                 }
 648         }
 649
 650         if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep &&
 651             !ieee80211_is_eapol_frame(ieee, skb)) {
 652                 IEEE80211_DEBUG_DROP("dropped unencrypted RX data "
 653                                      "frame from " MAC_FMT
 654                                      " (drop_unencrypted=1)\n",
 655                                      MAC_ARG(hdr->addr2));
 656                 goto rx_dropped;
 657         }
 658
 659         /* skb: hdr + (possible reassembled) full plaintext payload */
 660
 661         payload = skb->data + hdrlen;
 662         ethertype = (payload[6] << 8) | payload[7];
 663
 664 #ifdef NOT_YET
 665         /* If IEEE 802.1X is used, check whether the port is authorized to send
 666          * the received frame. */
 667         if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) {
 668                 if (ethertype == ETH_P_PAE) {
 669                         printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n",
 670                                dev->name);
 671                         if (ieee->hostapd && ieee->apdev) {
 672                                 /* Send IEEE 802.1X frames to the user
 673                                  * space daemon for processing */
 674                                 prism2_rx_80211(ieee->apdev, skb, rx_stats,
 675                                                 PRISM2_RX_MGMT);
 676                                 ieee->apdevstats.rx_packets++;
 677                                 ieee->apdevstats.rx_bytes += skb->len;
 678                                 goto rx_exit;
 679                         }
 680                 } else if (!frame_authorized) {
 681                         printk(KERN_DEBUG "%s: dropped frame from "
 682                                "unauthorized port (IEEE 802.1X): "
 683                                "ethertype=0x%04x\n", dev->name, ethertype);
 684                         goto rx_dropped;
 685                 }
 686         }
 687 #endif
 688
 689         /* convert hdr + possible LLC headers into Ethernet header */
 690         if (skb->len - hdrlen >= 8 &&
 691             ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 &&
 692               ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
 693              memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) {
 694                 /* remove RFC1042 or Bridge-Tunnel encapsulation and
 695                  * replace EtherType */
 696                 skb_pull(skb, hdrlen + SNAP_SIZE);
 697                 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 698                 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 699         } else {
 700                 u16 len;
 701                 /* Leave Ethernet header part of hdr and full payload */
 702                 skb_pull(skb, hdrlen);
 703                 len = htons(skb->len);
 704                 memcpy(skb_push(skb, 2), &len, 2);
 705                 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 706                 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 707         }
 708
 709 #ifdef NOT_YET
 710         if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 711                     IEEE80211_FCTL_TODS) && skb->len >= ETH_HLEN + ETH_ALEN) {
 712                 /* Non-standard frame: get addr4 from its bogus location after
 713                  * the payload */
 714                 memcpy(skb->data + ETH_ALEN,
 715                        skb->data + skb->len - ETH_ALEN, ETH_ALEN);
 716                 skb_trim(skb, skb->len - ETH_ALEN);
 717         }
 718 #endif
 719
 720         stats->rx_packets++;
 721         stats->rx_bytes += skb->len;
 722
 723 #ifdef NOT_YET
 724         if (ieee->iw_mode == IW_MODE_MASTER && !wds && ieee->ap->bridge_packets) {
 725                 if (dst[0] & 0x01) {
 726                         /* copy multicast frame both to the higher layers and
 727                          * to the wireless media */
 728                         ieee->ap->bridged_multicast++;
 729                         skb2 = skb_clone(skb, GFP_ATOMIC);
 730                         if (skb2 == NULL)
 731                                 printk(KERN_DEBUG "%s: skb_clone failed for "
 732                                        "multicast frame\n", dev->name);
 733                 } else if (hostap_is_sta_assoc(ieee->ap, dst)) {
 734                         /* send frame directly to the associated STA using
 735                          * wireless media and not passing to higher layers */
 736                         ieee->ap->bridged_unicast++;
 737                         skb2 = skb;
 738                         skb = NULL;
 739                 }
 740         }
 741
 742         if (skb2 != NULL) {
 743                 /* send to wireless media */
 744                 skb2->protocol = __constant_htons(ETH_P_802_3);
 745                 skb2->mac.raw = skb2->nh.raw = skb2->data;
 746                 /* skb2->nh.raw = skb2->data + ETH_HLEN; */
 747                 skb2->dev = dev;
 748                 dev_queue_xmit(skb2);
 749         }
 750 #endif
 751
 752         if (skb) {
 753                 skb->protocol = eth_type_trans(skb, dev);
 754                 memset(skb->cb, 0, sizeof(skb->cb));
 755                 skb->dev = dev;
 756                 skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
 757                 if (netif_rx(skb) == NET_RX_DROP) {
 758                         /* netif_rx always succeeds, but it might drop
 759                          * the packet.  If it drops the packet, we log that
 760                          * in our stats. */
 761                         IEEE80211_DEBUG_DROP
 762                             ("RX: netif_rx dropped the packet\n");
 763                         stats->rx_dropped++;
 764                 }
 765         }
 766
 767       rx_exit:
 768 #ifdef NOT_YET
 769         if (sta)
 770                 hostap_handle_sta_release(sta);
 771 #endif
 772         return 1;
 773
 774       rx_dropped:
 775         stats->rx_dropped++;
 776
 777         /* Returning 0 indicates to caller that we have not handled the SKB--
 778          * so it is still allocated and can be used again by underlying
 779          * hardware as a DMA target */
 780         return 0;
 781 }
 782
 783 /* Filter out unrelated packets, call ieee80211_rx[_mgt] */
 784 int ieee80211_rx_any(struct ieee80211_device *ieee,
 785                      struct sk_buff *skb, struct ieee80211_rx_stats *stats)
 786 {
 787         struct ieee80211_hdr_4addr *hdr;
 788         int is_packet_for_us;
 789         u16 fc;
 790
 791         if (ieee->iw_mode == IW_MODE_MONITOR)
 792                 return ieee80211_rx(ieee, skb, stats) ? 0 : -EINVAL;
 793
 794         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 795         fc = le16_to_cpu(hdr->frame_ctl);
 796
 797         if ((fc & IEEE80211_FCTL_VERS) != 0)
 798                 return -EINVAL;
 799
 800         switch (fc & IEEE80211_FCTL_FTYPE) {
 801         case IEEE80211_FTYPE_MGMT:
 802                 ieee80211_rx_mgt(ieee, hdr, stats);
 803                 return 0;
 804         case IEEE80211_FTYPE_DATA:
 805                 break;
 806         case IEEE80211_FTYPE_CTL:
 807                 return 0;
 808         default:
 809                 return -EINVAL;
 810         }
 811
 812         is_packet_for_us = 0;
 813         switch (ieee->iw_mode) {
 814         case IW_MODE_ADHOC:
 815                 /* our BSS and not from/to DS */
 816                 if (memcmp(hdr->addr3, ieee->bssid, ETH_ALEN) == 0)
 817                 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == 0) {
 818                         /* promisc: get all */
 819                         if (ieee->dev->flags & IFF_PROMISC)
 820                                 is_packet_for_us = 1;
 821                         /* to us */
 822                         else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
 823                                 is_packet_for_us = 1;
 824                         /* mcast */
 825                         else if (is_multicast_ether_addr(hdr->addr1))
 826                                 is_packet_for_us = 1;
 827                 }
 828                 break;
 829         case IW_MODE_INFRA:
 830                 /* our BSS (== from our AP) and from DS */
 831                 if (memcmp(hdr->addr2, ieee->bssid, ETH_ALEN) == 0)
 832                 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS) {
 833                         /* promisc: get all */
 834                         if (ieee->dev->flags & IFF_PROMISC)
 835                                 is_packet_for_us = 1;
 836                         /* to us */
 837                         else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
 838                                 is_packet_for_us = 1;
 839                         /* mcast */
 840                         else if (is_multicast_ether_addr(hdr->addr1)) {
 841                                 /* not our own packet bcasted from AP */
 842                                 if (memcmp(hdr->addr3, ieee->dev->dev_addr, ETH_ALEN))
 843                                         is_packet_for_us = 1;
 844                         }
 845                 }
 846                 break;
 847         default:
 848                 /* ? */
 849                 break;
 850         }
 851
 852         if (is_packet_for_us)
 853                 return (ieee80211_rx(ieee, skb, stats) ? 0 : -EINVAL);
 854         return 0;
 855 }
 856
 857 #define MGMT_FRAME_FIXED_PART_LENGTH            0x24
 858
 859 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
 860
 861 /*
 862 * Make ther structure we read from the beacon packet has
 863 * the right values
 864 */
 865 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
 866                                      *info_element, int sub_type)
 867 {
 868
 869         if (info_element->qui_subtype != sub_type)
 870                 return -1;
 871         if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
 872                 return -1;
 873         if (info_element->qui_type != QOS_OUI_TYPE)
 874                 return -1;
 875         if (info_element->version != QOS_VERSION_1)
 876                 return -1;
 877
 878         return 0;
 879 }
 880
 881 /*
 882  * Parse a QoS parameter element
 883  */
 884 static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
 885                                             *element_param, struct ieee80211_info_element
 886                                             *info_element)
 887 {
 888         int ret = 0;
 889         u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2;
 890
 891         if ((info_element == NULL) || (element_param == NULL))
 892                 return -1;
 893
 894         if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
 895                 memcpy(element_param->info_element.qui, info_element->data,
 896                        info_element->len);
 897                 element_param->info_element.elementID = info_element->id;
 898                 element_param->info_element.length = info_element->len;
 899         } else
 900                 ret = -1;
 901         if (ret == 0)
 902                 ret = ieee80211_verify_qos_info(&element_param->info_element,
 903                                                 QOS_OUI_PARAM_SUB_TYPE);
 904         return ret;
 905 }
 906
 907 /*
 908  * Parse a QoS information element
 909  */
 910 static int ieee80211_read_qos_info_element(struct
 911                                            ieee80211_qos_information_element
 912                                            *element_info, struct ieee80211_info_element
 913                                            *info_element)
 914 {
 915         int ret = 0;
 916         u16 size = sizeof(struct ieee80211_qos_information_element) - 2;
 917
 918         if (element_info == NULL)
 919                 return -1;
 920         if (info_element == NULL)
 921                 return -1;
 922
 923         if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
 924                 memcpy(element_info->qui, info_element->data,
 925                        info_element->len);
 926                 element_info->elementID = info_element->id;
 927                 element_info->length = info_element->len;
 928         } else
 929                 ret = -1;
 930
 931         if (ret == 0)
 932                 ret = ieee80211_verify_qos_info(element_info,
 933                                                 QOS_OUI_INFO_SUB_TYPE);
 934         return ret;
 935 }
 936
 937 /*
 938  * Write QoS parameters from the ac parameters.
 939  */
 940 static int ieee80211_qos_convert_ac_to_parameters(struct
 941                                                   ieee80211_qos_parameter_info
 942                                                   *param_elm, struct
 943                                                   ieee80211_qos_parameters
 944                                                   *qos_param)
 945 {
 946         int rc = 0;
 947         int i;
 948         struct ieee80211_qos_ac_parameter *ac_params;
 949         u32 txop;
 950         u8 cw_min;
 951         u8 cw_max;
 952
 953         for (i = 0; i < QOS_QUEUE_NUM; i++) {
 954                 ac_params = &(param_elm->ac_params_record[i]);
 955
 956                 qos_param->aifs[i] = (ac_params->aci_aifsn) & 0x0F;
 957                 qos_param->aifs[i] -= (qos_param->aifs[i] < 2) ? 0 : 2;
 958
 959                 cw_min = ac_params->ecw_min_max & 0x0F;
 960                 qos_param->cw_min[i] = (u16) ((1 << cw_min) - 1);
 961
 962                 cw_max = (ac_params->ecw_min_max & 0xF0) >> 4;
 963                 qos_param->cw_max[i] = (u16) ((1 << cw_max) - 1);
 964
 965                 qos_param->flag[i] =
 966                     (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
 967
 968                 txop = le16_to_cpu(ac_params->tx_op_limit) * 32;
 969                 qos_param->tx_op_limit[i] = (u16) txop;
 970         }
 971         return rc;
 972 }
 973
 974 /*
 975  * we have a generic data element which it may contain QoS information or
 976  * parameters element. check the information element length to decide
 977  * which type to read
 978  */
 979 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
 980                                              *info_element,
 981                                              struct ieee80211_network *network)
 982 {
 983         int rc = 0;
 984         struct ieee80211_qos_parameters *qos_param = NULL;
 985         struct ieee80211_qos_information_element qos_info_element;
 986
 987         rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);
 988
 989         if (rc == 0) {
 990                 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
 991                 network->flags |= NETWORK_HAS_QOS_INFORMATION;
 992         } else {
 993                 struct ieee80211_qos_parameter_info param_element;
 994
 995                 rc = ieee80211_read_qos_param_element(&param_element,
 996                                                       info_element);
 997                 if (rc == 0) {
 998                         qos_param = &(network->qos_data.parameters);
 999                         ieee80211_qos_convert_ac_to_parameters(&param_element,
1000                                                                qos_param);
1001                         network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1002                         network->qos_data.param_count =
1003                             param_element.info_element.ac_info & 0x0F;
1004                 }
1005         }
1006
1007         if (rc == 0) {
1008                 IEEE80211_DEBUG_QOS("QoS is supported\n");
1009                 network->qos_data.supported = 1;
1010         }
1011         return rc;
1012 }
1013
1014 #ifdef CONFIG_IEEE80211_DEBUG
1015 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1016
1017 static const char *get_info_element_string(u16 id)
1018 {
1019         switch (id) {
1020                 MFIE_STRING(SSID);
1021                 MFIE_STRING(RATES);
1022                 MFIE_STRING(FH_SET);
1023                 MFIE_STRING(DS_SET);
1024                 MFIE_STRING(CF_SET);
1025                 MFIE_STRING(TIM);
1026                 MFIE_STRING(IBSS_SET);
1027                 MFIE_STRING(COUNTRY);
1028                 MFIE_STRING(HOP_PARAMS);
1029                 MFIE_STRING(HOP_TABLE);
1030                 MFIE_STRING(REQUEST);
1031                 MFIE_STRING(CHALLENGE);
1032                 MFIE_STRING(POWER_CONSTRAINT);
1033                 MFIE_STRING(POWER_CAPABILITY);
1034                 MFIE_STRING(TPC_REQUEST);
1035                 MFIE_STRING(TPC_REPORT);
1036                 MFIE_STRING(SUPP_CHANNELS);
1037                 MFIE_STRING(CSA);
1038                 MFIE_STRING(MEASURE_REQUEST);
1039                 MFIE_STRING(MEASURE_REPORT);
1040                 MFIE_STRING(QUIET);
1041                 MFIE_STRING(IBSS_DFS);
1042                 MFIE_STRING(ERP_INFO);
1043                 MFIE_STRING(RSN);
1044                 MFIE_STRING(RATES_EX);
1045                 MFIE_STRING(GENERIC);
1046                 MFIE_STRING(QOS_PARAMETER);
1047         default:
1048                 return "UNKNOWN";
1049         }
1050 }
1051 #endif
1052
1053 static int ieee80211_parse_info_param(struct ieee80211_info_element
1054                                       *info_element, u16 length,
1055                                       struct ieee80211_network *network)
1056 {
1057         u8 i;
1058 #ifdef CONFIG_IEEE80211_DEBUG
1059         char rates_str[64];
1060         char *p;
1061 #endif
1062
1063         while (length >= sizeof(*info_element)) {
1064                 if (sizeof(*info_element) + info_element->len > length) {
1065                         IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
1066                                              "info_element->len + 2 > left : "
1067                                              "info_element->len+2=%zd left=%d, id=%d.\n",
1068                                              info_element->len +
1069                                              sizeof(*info_element),
1070                                              length, info_element->id);
1071                         return 1;
1072                 }
1073
1074                 switch (info_element->id) {
1075                 case MFIE_TYPE_SSID:
1076                         if (ieee80211_is_empty_essid(info_element->data,
1077                                                      info_element->len)) {
1078                                 network->flags |= NETWORK_EMPTY_ESSID;
1079                                 break;
1080                         }
1081
1082                         network->ssid_len = min(info_element->len,
1083                                                 (u8) IW_ESSID_MAX_SIZE);
1084                         memcpy(network->ssid, info_element->data,
1085                                network->ssid_len);
1086                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
1087                                 memset(network->ssid + network->ssid_len, 0,
1088                                        IW_ESSID_MAX_SIZE - network->ssid_len);
1089
1090                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1091                                              network->ssid, network->ssid_len);
1092                         break;
1093
1094                 case MFIE_TYPE_RATES:
1095 #ifdef CONFIG_IEEE80211_DEBUG
1096                         p = rates_str;
1097 #endif
1098                         network->rates_len = min(info_element->len,
1099                                                  MAX_RATES_LENGTH);
1100                         for (i = 0; i < network->rates_len; i++) {
1101                                 network->rates[i] = info_element->data[i];
1102 #ifdef CONFIG_IEEE80211_DEBUG
1103                                 p += snprintf(p, sizeof(rates_str) -
1104                                               (p - rates_str), "%02X ",
1105                                               network->rates[i]);
1106 #endif
1107                                 if (ieee80211_is_ofdm_rate
1108                                     (info_element->data[i])) {
1109                                         network->flags |= NETWORK_HAS_OFDM;
1110                                         if (info_element->data[i] &
1111                                             IEEE80211_BASIC_RATE_MASK)
1112                                                 network->flags &=
1113                                                     ~NETWORK_HAS_CCK;
1114                                 }
1115                         }
1116
1117                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1118                                              rates_str, network->rates_len);
1119                         break;
1120
1121                 case MFIE_TYPE_RATES_EX:
1122 #ifdef CONFIG_IEEE80211_DEBUG
1123                         p = rates_str;
1124 #endif
1125                         network->rates_ex_len = min(info_element->len,
1126                                                     MAX_RATES_EX_LENGTH);
1127                         for (i = 0; i < network->rates_ex_len; i++) {
1128                                 network->rates_ex[i] = info_element->data[i];
1129 #ifdef CONFIG_IEEE80211_DEBUG
1130                                 p += snprintf(p, sizeof(rates_str) -
1131                                               (p - rates_str), "%02X ",
1132                                               network->rates[i]);
1133 #endif
1134                                 if (ieee80211_is_ofdm_rate
1135                                     (info_element->data[i])) {
1136                                         network->flags |= NETWORK_HAS_OFDM;
1137                                         if (info_element->data[i] &
1138                                             IEEE80211_BASIC_RATE_MASK)
1139                                                 network->flags &=
1140                                                     ~NETWORK_HAS_CCK;
1141                                 }
1142                         }
1143
1144                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1145                                              rates_str, network->rates_ex_len);
1146                         break;
1147
1148                 case MFIE_TYPE_DS_SET:
1149                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1150                                              info_element->data[0]);
1151                         network->channel = info_element->data[0];
1152                         break;
1153
1154                 case MFIE_TYPE_FH_SET:
1155                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1156                         break;
1157
1158                 case MFIE_TYPE_CF_SET:
1159                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1160                         break;
1161
1162                 case MFIE_TYPE_TIM:
1163                         network->tim.tim_count = info_element->data[0];
1164                         network->tim.tim_period = info_element->data[1];
1165                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
1166                         break;
1167
1168                 case MFIE_TYPE_ERP_INFO:
1169                         network->erp_value = info_element->data[0];
1170                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1171                                              network->erp_value);
1172                         break;
1173
1174                 case MFIE_TYPE_IBSS_SET:
1175                         network->atim_window = info_element->data[0];
1176                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1177                                              network->atim_window);
1178                         break;
1179
1180                 case MFIE_TYPE_CHALLENGE:
1181                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1182                         break;
1183
1184                 case MFIE_TYPE_GENERIC:
1185                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1186                                              info_element->len);
1187                         if (!ieee80211_parse_qos_info_param_IE(info_element,
1188                                                                network))
1189                                 break;
1190
1191                         if (info_element->len >= 4 &&
1192                             info_element->data[0] == 0x00 &&
1193                             info_element->data[1] == 0x50 &&
1194                             info_element->data[2] == 0xf2 &&
1195                             info_element->data[3] == 0x01) {
1196                                 network->wpa_ie_len = min(info_element->len + 2,
1197                                                           MAX_WPA_IE_LEN);
1198                                 memcpy(network->wpa_ie, info_element,
1199                                        network->wpa_ie_len);
1200                         }
1201                         break;
1202
1203                 case MFIE_TYPE_RSN:
1204                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
1205                                              info_element->len);
1206                         network->rsn_ie_len = min(info_element->len + 2,
1207                                                   MAX_WPA_IE_LEN);
1208                         memcpy(network->rsn_ie, info_element,
1209                                network->rsn_ie_len);
1210                         break;
1211
1212                 case MFIE_TYPE_QOS_PARAMETER:
1213                         printk(KERN_ERR
1214                                "QoS Error need to parse QOS_PARAMETER IE\n");
1215                         break;
1216                         /* 802.11h */
1217                 case MFIE_TYPE_POWER_CONSTRAINT:
1218                         network->power_constraint = info_element->data[0];
1219                         network->flags |= NETWORK_HAS_POWER_CONSTRAINT;
1220                         break;
1221
1222                 case MFIE_TYPE_CSA:
1223                         network->power_constraint = info_element->data[0];
1224                         network->flags |= NETWORK_HAS_CSA;
1225                         break;
1226
1227                 case MFIE_TYPE_QUIET:
1228                         network->quiet.count = info_element->data[0];
1229                         network->quiet.period = info_element->data[1];
1230                         network->quiet.duration = info_element->data[2];
1231                         network->quiet.offset = info_element->data[3];
1232                         network->flags |= NETWORK_HAS_QUIET;
1233                         break;
1234
1235                 case MFIE_TYPE_IBSS_DFS:
1236                         if (network->ibss_dfs)
1237                                 break;
1238                         network->ibss_dfs =
1239                             kmalloc(info_element->len, GFP_ATOMIC);
1240                         if (!network->ibss_dfs)
1241                                 return 1;
1242                         memcpy(network->ibss_dfs, info_element->data,
1243                                info_element->len);
1244                         network->flags |= NETWORK_HAS_IBSS_DFS;
1245                         break;
1246
1247                 case MFIE_TYPE_TPC_REPORT:
1248                         network->tpc_report.transmit_power =
1249                             info_element->data[0];
1250                         network->tpc_report.link_margin = info_element->data[1];
1251                         network->flags |= NETWORK_HAS_TPC_REPORT;
1252                         break;
1253
1254                 default:
1255                         IEEE80211_DEBUG_MGMT
1256                             ("Unsupported info element: %s (%d)\n",
1257                              get_info_element_string(info_element->id),
1258                              info_element->id);
1259                         break;
1260                 }
1261
1262                 length -= sizeof(*info_element) + info_element->len;
1263                 info_element =
1264                     (struct ieee80211_info_element *)&info_element->
1265                     data[info_element->len];
1266         }
1267
1268         return 0;
1269 }
1270
1271 static int ieee80211_handle_assoc_resp(struct ieee80211_device *ieee, struct ieee80211_assoc_response
1272                                        *frame, struct ieee80211_rx_stats *stats)
1273 {
1274         struct ieee80211_network network_resp = {
1275                 .ibss_dfs = NULL,
1276         };
1277         struct ieee80211_network *network = &network_resp;
1278         struct net_device *dev = ieee->dev;
1279
1280         network->flags = 0;
1281         network->qos_data.active = 0;
1282         network->qos_data.supported = 0;
1283         network->qos_data.param_count = 0;
1284         network->qos_data.old_param_count = 0;
1285
1286         //network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF);
1287         network->atim_window = le16_to_cpu(frame->aid);
1288         network->listen_interval = le16_to_cpu(frame->status);
1289         memcpy(network->bssid, frame->header.addr3, ETH_ALEN);
1290         network->capability = le16_to_cpu(frame->capability);
1291         network->last_scanned = jiffies;
1292         network->rates_len = network->rates_ex_len = 0;
1293         network->last_associate = 0;
1294         network->ssid_len = 0;
1295         network->erp_value =
1296             (network->capability & WLAN_CAPABILITY_IBSS) ? 0x3 : 0x0;
1297
1298         if (stats->freq == IEEE80211_52GHZ_BAND) {
1299                 /* for A band (No DS info) */
1300                 network->channel = stats->received_channel;
1301         } else
1302                 network->flags |= NETWORK_HAS_CCK;
1303
1304         network->wpa_ie_len = 0;
1305         network->rsn_ie_len = 0;
1306
1307         if (ieee80211_parse_info_param
1308             (frame->info_element, stats->len - sizeof(*frame), network))
1309                 return 1;
1310
1311         network->mode = 0;
1312         if (stats->freq == IEEE80211_52GHZ_BAND)
1313                 network->mode = IEEE_A;
1314         else {
1315                 if (network->flags & NETWORK_HAS_OFDM)
1316                         network->mode |= IEEE_G;
1317                 if (network->flags & NETWORK_HAS_CCK)
1318                         network->mode |= IEEE_B;
1319         }
1320
1321         if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
1322                 network->flags |= NETWORK_EMPTY_ESSID;
1323
1324         memcpy(&network->stats, stats, sizeof(network->stats));
1325
1326         if (ieee->handle_assoc_response != NULL)
1327                 ieee->handle_assoc_response(dev, frame, network);
1328
1329         return 0;
1330 }
1331
1332 /***************************************************/
1333
1334 static int ieee80211_network_init(struct ieee80211_device *ieee, struct ieee80211_probe_response
1335                                          *beacon,
1336                                          struct ieee80211_network *network,
1337                                          struct ieee80211_rx_stats *stats)
1338 {
1339         network->qos_data.active = 0;
1340         network->qos_data.supported = 0;
1341         network->qos_data.param_count = 0;
1342         network->qos_data.old_param_count = 0;
1343
1344         /* Pull out fixed field data */
1345         memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
1346         network->capability = le16_to_cpu(beacon->capability);
1347         network->last_scanned = jiffies;
1348         network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
1349         network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
1350         network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
1351         /* Where to pull this? beacon->listen_interval; */
1352         network->listen_interval = 0x0A;
1353         network->rates_len = network->rates_ex_len = 0;
1354         network->last_associate = 0;
1355         network->ssid_len = 0;
1356         network->flags = 0;
1357         network->atim_window = 0;
1358         network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
1359             0x3 : 0x0;
1360
1361         if (stats->freq == IEEE80211_52GHZ_BAND) {
1362                 /* for A band (No DS info) */
1363                 network->channel = stats->received_channel;
1364         } else
1365                 network->flags |= NETWORK_HAS_CCK;
1366
1367         network->wpa_ie_len = 0;
1368         network->rsn_ie_len = 0;
1369
1370         if (ieee80211_parse_info_param
1371             (beacon->info_element, stats->len - sizeof(*beacon), network))
1372                 return 1;
1373
1374         network->mode = 0;
1375         if (stats->freq == IEEE80211_52GHZ_BAND)
1376                 network->mode = IEEE_A;
1377         else {
1378                 if (network->flags & NETWORK_HAS_OFDM)
1379                         network->mode |= IEEE_G;
1380                 if (network->flags & NETWORK_HAS_CCK)
1381                         network->mode |= IEEE_B;
1382         }
1383
1384         if (network->mode == 0) {
1385                 IEEE80211_DEBUG_SCAN("Filtered out '%s (" MAC_FMT ")' "
1386                                      "network.\n",
1387                                      escape_essid(network->ssid,
1388                                                   network->ssid_len),
1389                                      MAC_ARG(network->bssid));
1390                 return 1;
1391         }
1392
1393         if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
1394                 network->flags |= NETWORK_EMPTY_ESSID;
1395
1396         memcpy(&network->stats, stats, sizeof(network->stats));
1397
1398         return 0;
1399 }
1400
1401 static inline int is_same_network(struct ieee80211_network *src,
1402                                   struct ieee80211_network *dst)
1403 {
1404         /* A network is only a duplicate if the channel, BSSID, and ESSID
1405          * all match.  We treat all <hidden> with the same BSSID and channel
1406          * as one network */
1407         return ((src->ssid_len == dst->ssid_len) &&
1408                 (src->channel == dst->channel) &&
1409                 !compare_ether_addr(src->bssid, dst->bssid) &&
1410                 !memcmp(src->ssid, dst->ssid, src->ssid_len));
1411 }
1412
1413 static void update_network(struct ieee80211_network *dst,
1414                                   struct ieee80211_network *src)
1415 {
1416         int qos_active;
1417         u8 old_param;
1418
1419         ieee80211_network_reset(dst);
1420         dst->ibss_dfs = src->ibss_dfs;
1421
1422         /* We only update the statistics if they were created by receiving
1423          * the network information on the actual channel the network is on.
1424          *
1425          * This keeps beacons received on neighbor channels from bringing
1426          * down the signal level of an AP. */
1427         if (dst->channel == src->stats.received_channel)
1428                 memcpy(&dst->stats, &src->stats,
1429                        sizeof(struct ieee80211_rx_stats));
1430         else
1431                 IEEE80211_DEBUG_SCAN("Network " MAC_FMT " info received "
1432                         "off channel (%d vs. %d)\n", MAC_ARG(src->bssid),
1433                         dst->channel, src->stats.received_channel);
1434
1435         dst->capability = src->capability;
1436         memcpy(dst->rates, src->rates, src->rates_len);
1437         dst->rates_len = src->rates_len;
1438         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
1439         dst->rates_ex_len = src->rates_ex_len;
1440
1441         dst->mode = src->mode;
1442         dst->flags = src->flags;
1443         dst->time_stamp[0] = src->time_stamp[0];
1444         dst->time_stamp[1] = src->time_stamp[1];
1445
1446         dst->beacon_interval = src->beacon_interval;
1447         dst->listen_interval = src->listen_interval;
1448         dst->atim_window = src->atim_window;
1449         dst->erp_value = src->erp_value;
1450         dst->tim = src->tim;
1451
1452         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
1453         dst->wpa_ie_len = src->wpa_ie_len;
1454         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
1455         dst->rsn_ie_len = src->rsn_ie_len;
1456
1457         dst->last_scanned = jiffies;
1458         qos_active = src->qos_data.active;
1459         old_param = dst->qos_data.old_param_count;
1460         if (dst->flags & NETWORK_HAS_QOS_MASK)
1461                 memcpy(&dst->qos_data, &src->qos_data,
1462                        sizeof(struct ieee80211_qos_data));
1463         else {
1464                 dst->qos_data.supported = src->qos_data.supported;
1465                 dst->qos_data.param_count = src->qos_data.param_count;
1466         }
1467
1468         if (dst->qos_data.supported == 1) {
1469                 if (dst->ssid_len)
1470                         IEEE80211_DEBUG_QOS
1471                             ("QoS the network %s is QoS supported\n",
1472                              dst->ssid);
1473                 else
1474                         IEEE80211_DEBUG_QOS
1475                             ("QoS the network is QoS supported\n");
1476         }
1477         dst->qos_data.active = qos_active;
1478         dst->qos_data.old_param_count = old_param;
1479
1480         /* dst->last_associate is not overwritten */
1481 }
1482
1483 static inline int is_beacon(__le16 fc)
1484 {
1485         return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
1486 }
1487
1488 static void ieee80211_process_probe_response(struct ieee80211_device
1489                                                     *ieee, struct
1490                                                     ieee80211_probe_response
1491                                                     *beacon, struct ieee80211_rx_stats
1492                                                     *stats)
1493 {
1494         struct net_device *dev = ieee->dev;
1495         struct ieee80211_network network = {
1496                 .ibss_dfs = NULL,
1497         };
1498         struct ieee80211_network *target;
1499         struct ieee80211_network *oldest = NULL;
1500 #ifdef CONFIG_IEEE80211_DEBUG
1501         struct ieee80211_info_element *info_element = beacon->info_element;
1502 #endif
1503         unsigned long flags;
1504
1505         IEEE80211_DEBUG_SCAN("'%s' (" MAC_FMT
1506                              "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1507                              escape_essid(info_element->data,
1508                                           info_element->len),
1509                              MAC_ARG(beacon->header.addr3),
1510                              (beacon->capability & (1 << 0xf)) ? '1' : '0',
1511                              (beacon->capability & (1 << 0xe)) ? '1' : '0',
1512                              (beacon->capability & (1 << 0xd)) ? '1' : '0',
1513                              (beacon->capability & (1 << 0xc)) ? '1' : '0',
1514                              (beacon->capability & (1 << 0xb)) ? '1' : '0',
1515                              (beacon->capability & (1 << 0xa)) ? '1' : '0',
1516                              (beacon->capability & (1 << 0x9)) ? '1' : '0',
1517                              (beacon->capability & (1 << 0x8)) ? '1' : '0',
1518                              (beacon->capability & (1 << 0x7)) ? '1' : '0',
1519                              (beacon->capability & (1 << 0x6)) ? '1' : '0',
1520                              (beacon->capability & (1 << 0x5)) ? '1' : '0',
1521                              (beacon->capability & (1 << 0x4)) ? '1' : '0',
1522                              (beacon->capability & (1 << 0x3)) ? '1' : '0',
1523                              (beacon->capability & (1 << 0x2)) ? '1' : '0',
1524                              (beacon->capability & (1 << 0x1)) ? '1' : '0',
1525                              (beacon->capability & (1 << 0x0)) ? '1' : '0');
1526
1527         if (ieee80211_network_init(ieee, beacon, &network, stats)) {
1528                 IEEE80211_DEBUG_SCAN("Dropped '%s' (" MAC_FMT ") via %s.\n",
1529                                      escape_essid(info_element->data,
1530                                                   info_element->len),
1531                                      MAC_ARG(beacon->header.addr3),
1532                                      is_beacon(beacon->header.frame_ctl) ?
1533                                      "BEACON" : "PROBE RESPONSE");
1534                 return;
1535         }
1536
1537         /* The network parsed correctly -- so now we scan our known networks
1538          * to see if we can find it in our list.
1539          *
1540          * NOTE:  This search is definitely not optimized.  Once its doing
1541          *        the "right thing" we'll optimize it for efficiency if
1542          *        necessary */
1543
1544         /* Search for this entry in the list and update it if it is
1545          * already there. */
1546
1547         spin_lock_irqsave(&ieee->lock, flags);
1548
1549         list_for_each_entry(target, &ieee->network_list, list) {
1550                 if (is_same_network(target, &network))
1551                         break;
1552
1553                 if ((oldest == NULL) ||
1554                     (target->last_scanned < oldest->last_scanned))
1555                         oldest = target;
1556         }
1557
1558         /* If we didn't find a match, then get a new network slot to initialize
1559          * with this beacon's information */
1560         if (&target->list == &ieee->network_list) {
1561                 if (list_empty(&ieee->network_free_list)) {
1562                         /* If there are no more slots, expire the oldest */
1563                         list_del(&oldest->list);
1564                         target = oldest;
1565                         IEEE80211_DEBUG_SCAN("Expired '%s' (" MAC_FMT ") from "
1566                                              "network list.\n",
1567                                              escape_essid(target->ssid,
1568                                                           target->ssid_len),
1569                                              MAC_ARG(target->bssid));
1570                         ieee80211_network_reset(target);
1571                 } else {
1572                         /* Otherwise just pull from the free list */
1573                         target = list_entry(ieee->network_free_list.next,
1574                                             struct ieee80211_network, list);
1575                         list_del(ieee->network_free_list.next);
1576                 }
1577
1578 #ifdef CONFIG_IEEE80211_DEBUG
1579                 IEEE80211_DEBUG_SCAN("Adding '%s' (" MAC_FMT ") via %s.\n",
1580                                      escape_essid(network.ssid,
1581                                                   network.ssid_len),
1582                                      MAC_ARG(network.bssid),
1583                                      is_beacon(beacon->header.frame_ctl) ?
1584                                      "BEACON" : "PROBE RESPONSE");
1585 #endif
1586                 memcpy(target, &network, sizeof(*target));
1587                 network.ibss_dfs = NULL;
1588                 list_add_tail(&target->list, &ieee->network_list);
1589         } else {
1590                 IEEE80211_DEBUG_SCAN("Updating '%s' (" MAC_FMT ") via %s.\n",
1591                                      escape_essid(target->ssid,
1592                                                   target->ssid_len),
1593                                      MAC_ARG(target->bssid),
1594                                      is_beacon(beacon->header.frame_ctl) ?
1595                                      "BEACON" : "PROBE RESPONSE");
1596                 update_network(target, &network);
1597                 network.ibss_dfs = NULL;
1598         }
1599
1600         spin_unlock_irqrestore(&ieee->lock, flags);
1601
1602         if (is_beacon(beacon->header.frame_ctl)) {
1603                 if (ieee->handle_beacon != NULL)
1604                         ieee->handle_beacon(dev, beacon, target);
1605         } else {
1606                 if (ieee->handle_probe_response != NULL)
1607                         ieee->handle_probe_response(dev, beacon, target);
1608         }
1609 }
1610
1611 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
1612                       struct ieee80211_hdr_4addr *header,
1613                       struct ieee80211_rx_stats *stats)
1614 {
1615         switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
1616         case IEEE80211_STYPE_ASSOC_RESP:
1617                 IEEE80211_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
1618                                      WLAN_FC_GET_STYPE(le16_to_cpu
1619                                                        (header->frame_ctl)));
1620                 ieee80211_handle_assoc_resp(ieee,
1621                                             (struct ieee80211_assoc_response *)
1622                                             header, stats);
1623                 break;
1624
1625         case IEEE80211_STYPE_REASSOC_RESP:
1626                 IEEE80211_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
1627                                      WLAN_FC_GET_STYPE(le16_to_cpu
1628                                                        (header->frame_ctl)));
1629                 break;
1630
1631         case IEEE80211_STYPE_PROBE_REQ:
1632                 IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1633                                      WLAN_FC_GET_STYPE(le16_to_cpu
1634                                                        (header->frame_ctl)));
1635
1636                 if (ieee->handle_probe_request != NULL)
1637                         ieee->handle_probe_request(ieee->dev,
1638                                                    (struct
1639                                                     ieee80211_probe_request *)
1640                                                    header, stats);
1641                 break;
1642
1643         case IEEE80211_STYPE_PROBE_RESP:
1644                 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1645                                      WLAN_FC_GET_STYPE(le16_to_cpu
1646                                                        (header->frame_ctl)));
1647                 IEEE80211_DEBUG_SCAN("Probe response\n");
1648                 ieee80211_process_probe_response(ieee,
1649                                                  (struct
1650                                                   ieee80211_probe_response *)
1651                                                  header, stats);
1652                 break;
1653
1654         case IEEE80211_STYPE_BEACON:
1655                 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
1656                                      WLAN_FC_GET_STYPE(le16_to_cpu
1657                                                        (header->frame_ctl)));
1658                 IEEE80211_DEBUG_SCAN("Beacon\n");
1659                 ieee80211_process_probe_response(ieee,
1660                                                  (struct
1661                                                   ieee80211_probe_response *)
1662                                                  header, stats);
1663                 break;
1664         case IEEE80211_STYPE_AUTH:
1665
1666                 IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1667                                      WLAN_FC_GET_STYPE(le16_to_cpu
1668                                                        (header->frame_ctl)));
1669
1670                 if (ieee->handle_auth != NULL)
1671                         ieee->handle_auth(ieee->dev,
1672                                           (struct ieee80211_auth *)header);
1673                 break;
1674
1675         case IEEE80211_STYPE_DISASSOC:
1676                 if (ieee->handle_disassoc != NULL)
1677                         ieee->handle_disassoc(ieee->dev,
1678                                               (struct ieee80211_disassoc *)
1679                                               header);
1680                 break;
1681
1682         case IEEE80211_STYPE_ACTION:
1683                 IEEE80211_DEBUG_MGMT("ACTION\n");
1684                 if (ieee->handle_action)
1685                         ieee->handle_action(ieee->dev,
1686                                             (struct ieee80211_action *)
1687                                             header, stats);
1688                 break;
1689
1690         case IEEE80211_STYPE_REASSOC_REQ:
1691                 IEEE80211_DEBUG_MGMT("received reassoc (%d)\n",
1692                                      WLAN_FC_GET_STYPE(le16_to_cpu
1693                                                        (header->frame_ctl)));
1694
1695                 IEEE80211_WARNING("%s: IEEE80211_REASSOC_REQ received\n",
1696                                   ieee->dev->name);
1697                 if (ieee->handle_reassoc_request != NULL)
1698                         ieee->handle_reassoc_request(ieee->dev,
1699                                                     (struct ieee80211_reassoc_request *)
1700                                                      header);
1701                 break;
1702
1703         case IEEE80211_STYPE_ASSOC_REQ:
1704                 IEEE80211_DEBUG_MGMT("received assoc (%d)\n",
1705                                      WLAN_FC_GET_STYPE(le16_to_cpu
1706                                                        (header->frame_ctl)));
1707
1708                 IEEE80211_WARNING("%s: IEEE80211_ASSOC_REQ received\n",
1709                                   ieee->dev->name);
1710                 if (ieee->handle_assoc_request != NULL)
1711                         ieee->handle_assoc_request(ieee->dev);
1712                 break;
1713
1714         case IEEE80211_STYPE_DEAUTH:
1715                 IEEE80211_DEBUG_MGMT("DEAUTH\n");
1716                 if (ieee->handle_deauth != NULL)
1717                         ieee->handle_deauth(ieee->dev,
1718                                             (struct ieee80211_deauth *)
1719                                             header);
1720                 break;
1721         default:
1722                 IEEE80211_DEBUG_MGMT("received UNKNOWN (%d)\n",
1723                                      WLAN_FC_GET_STYPE(le16_to_cpu
1724                                                        (header->frame_ctl)));
1725                 IEEE80211_WARNING("%s: Unknown management packet: %d\n",
1726                                   ieee->dev->name,
1727                                   WLAN_FC_GET_STYPE(le16_to_cpu
1728                                                     (header->frame_ctl)));
1729                 break;
1730         }
1731 }
1732
1733 EXPORT_SYMBOL(ieee80211_rx_mgt);
1734 EXPORT_SYMBOL(ieee80211_rx);