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/gfp.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/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
  37 #include "libipw.h"
  38
  39 static void libipw_monitor_rx(struct libipw_device *ieee,
  40                                         struct sk_buff *skb,
  41                                         struct libipw_rx_stats *rx_stats)
  42 {
  43         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
  44         u16 fc = le16_to_cpu(hdr->frame_control);
  45
  46         skb->dev = ieee->dev;
  47         skb_reset_mac_header(skb);
  48         skb_pull(skb, libipw_get_hdrlen(fc));
  49         skb->pkt_type = PACKET_OTHERHOST;
  50         skb->protocol = htons(ETH_P_80211_RAW);
  51         memset(skb->cb, 0, sizeof(skb->cb));
  52         netif_rx(skb);
  53 }
  54
  55 /* Called only as a tasklet (software IRQ) */
  56 static struct libipw_frag_entry *libipw_frag_cache_find(struct
  57                                                               libipw_device
  58                                                               *ieee,
  59                                                               unsigned int seq,
  60                                                               unsigned int frag,
  61                                                               u8 * src,
  62                                                               u8 * dst)
  63 {
  64         struct libipw_frag_entry *entry;
  65         int i;
  66
  67         for (i = 0; i < LIBIPW_FRAG_CACHE_LEN; i++) {
  68                 entry = &ieee->frag_cache[i];
  69                 if (entry->skb != NULL &&
  70                     time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
  71                         LIBIPW_DEBUG_FRAG("expiring fragment cache entry "
  72                                              "seq=%u last_frag=%u\n",
  73                                              entry->seq, entry->last_frag);
  74                         dev_kfree_skb_any(entry->skb);
  75                         entry->skb = NULL;
  76                 }
  77
  78                 if (entry->skb != NULL && entry->seq == seq &&
  79                     (entry->last_frag + 1 == frag || frag == -1) &&
  80                     ether_addr_equal(entry->src_addr, src) &&
  81                     ether_addr_equal(entry->dst_addr, dst))
  82                         return entry;
  83         }
  84
  85         return NULL;
  86 }
  87
  88 /* Called only as a tasklet (software IRQ) */
  89 static struct sk_buff *libipw_frag_cache_get(struct libipw_device *ieee,
  90                                                 struct libipw_hdr_4addr *hdr)
  91 {
  92         struct sk_buff *skb = NULL;
  93         u16 sc;
  94         unsigned int frag, seq;
  95         struct libipw_frag_entry *entry;
  96
  97         sc = le16_to_cpu(hdr->seq_ctl);
  98         frag = WLAN_GET_SEQ_FRAG(sc);
  99         seq = WLAN_GET_SEQ_SEQ(sc);
 100
 101         if (frag == 0) {
 102                 /* Reserve enough space to fit maximum frame length */
 103                 skb = dev_alloc_skb(ieee->dev->mtu +
 104                                     sizeof(struct libipw_hdr_4addr) +
 105                                     8 /* LLC */  +
 106                                     2 /* alignment */  +
 107                                     8 /* WEP */  + ETH_ALEN /* WDS */ );
 108                 if (skb == NULL)
 109                         return NULL;
 110
 111                 entry = &ieee->frag_cache[ieee->frag_next_idx];
 112                 ieee->frag_next_idx++;
 113                 if (ieee->frag_next_idx >= LIBIPW_FRAG_CACHE_LEN)
 114                         ieee->frag_next_idx = 0;
 115
 116                 if (entry->skb != NULL)
 117                         dev_kfree_skb_any(entry->skb);
 118
 119                 entry->first_frag_time = jiffies;
 120                 entry->seq = seq;
 121                 entry->last_frag = frag;
 122                 entry->skb = skb;
 123                 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
 124                 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
 125         } else {
 126                 /* received a fragment of a frame for which the head fragment
 127                  * should have already been received */
 128                 entry = libipw_frag_cache_find(ieee, seq, frag, hdr->addr2,
 129                                                   hdr->addr1);
 130                 if (entry != NULL) {
 131                         entry->last_frag = frag;
 132                         skb = entry->skb;
 133                 }
 134         }
 135
 136         return skb;
 137 }
 138
 139 /* Called only as a tasklet (software IRQ) */
 140 static int libipw_frag_cache_invalidate(struct libipw_device *ieee,
 141                                            struct libipw_hdr_4addr *hdr)
 142 {
 143         u16 sc;
 144         unsigned int seq;
 145         struct libipw_frag_entry *entry;
 146
 147         sc = le16_to_cpu(hdr->seq_ctl);
 148         seq = WLAN_GET_SEQ_SEQ(sc);
 149
 150         entry = libipw_frag_cache_find(ieee, seq, -1, hdr->addr2,
 151                                           hdr->addr1);
 152
 153         if (entry == NULL) {
 154                 LIBIPW_DEBUG_FRAG("could not invalidate fragment cache "
 155                                      "entry (seq=%u)\n", seq);
 156                 return -1;
 157         }
 158
 159         entry->skb = NULL;
 160         return 0;
 161 }
 162
 163 #ifdef NOT_YET
 164 /* libipw_rx_frame_mgtmt
 165  *
 166  * Responsible for handling management control frames
 167  *
 168  * Called by libipw_rx */
 169 static int
 170 libipw_rx_frame_mgmt(struct libipw_device *ieee, struct sk_buff *skb,
 171                         struct libipw_rx_stats *rx_stats, u16 type,
 172                         u16 stype)
 173 {
 174         if (ieee->iw_mode == IW_MODE_MASTER) {
 175                 printk(KERN_DEBUG "%s: Master mode not yet supported.\n",
 176                        ieee->dev->name);
 177                 return 0;
 178 /*
 179   hostap_update_sta_ps(ieee, (struct hostap_libipw_hdr_4addr *)
 180   skb->data);*/
 181         }
 182
 183         if (ieee->hostapd && type == WLAN_FC_TYPE_MGMT) {
 184                 if (stype == WLAN_FC_STYPE_BEACON &&
 185                     ieee->iw_mode == IW_MODE_MASTER) {
 186                         struct sk_buff *skb2;
 187                         /* Process beacon frames also in kernel driver to
 188                          * update STA(AP) table statistics */
 189                         skb2 = skb_clone(skb, GFP_ATOMIC);
 190                         if (skb2)
 191                                 hostap_rx(skb2->dev, skb2, rx_stats);
 192                 }
 193
 194                 /* send management frames to the user space daemon for
 195                  * processing */
 196                 ieee->apdevstats.rx_packets++;
 197                 ieee->apdevstats.rx_bytes += skb->len;
 198                 prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
 199                 return 0;
 200         }
 201
 202         if (ieee->iw_mode == IW_MODE_MASTER) {
 203                 if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
 204                         printk(KERN_DEBUG "%s: unknown management frame "
 205                                "(type=0x%02x, stype=0x%02x) dropped\n",
 206                                skb->dev->name, type, stype);
 207                         return -1;
 208                 }
 209
 210                 hostap_rx(skb->dev, skb, rx_stats);
 211                 return 0;
 212         }
 213
 214         printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame "
 215                "received in non-Host AP mode\n", skb->dev->name);
 216         return -1;
 217 }
 218 #endif
 219
 220 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
 221 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
 222 static unsigned char libipw_rfc1042_header[] =
 223     { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
 224
 225 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
 226 static unsigned char libipw_bridge_tunnel_header[] =
 227     { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
 228 /* No encapsulation header if EtherType < 0x600 (=length) */
 229
 230 /* Called by libipw_rx_frame_decrypt */
 231 static int libipw_is_eapol_frame(struct libipw_device *ieee,
 232                                     struct sk_buff *skb)
 233 {
 234         struct net_device *dev = ieee->dev;
 235         u16 fc, ethertype;
 236         struct libipw_hdr_3addr *hdr;
 237         u8 *pos;
 238
 239         if (skb->len < 24)
 240                 return 0;
 241
 242         hdr = (struct libipw_hdr_3addr *)skb->data;
 243         fc = le16_to_cpu(hdr->frame_ctl);
 244
 245         /* check that the frame is unicast frame to us */
 246         if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 247             IEEE80211_FCTL_TODS &&
 248             ether_addr_equal(hdr->addr1, dev->dev_addr) &&
 249             ether_addr_equal(hdr->addr3, dev->dev_addr)) {
 250                 /* ToDS frame with own addr BSSID and DA */
 251         } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 252                    IEEE80211_FCTL_FROMDS &&
 253                    ether_addr_equal(hdr->addr1, dev->dev_addr)) {
 254                 /* FromDS frame with own addr as DA */
 255         } else
 256                 return 0;
 257
 258         if (skb->len < 24 + 8)
 259                 return 0;
 260
 261         /* check for port access entity Ethernet type */
 262         pos = skb->data + 24;
 263         ethertype = (pos[6] << 8) | pos[7];
 264         if (ethertype == ETH_P_PAE)
 265                 return 1;
 266
 267         return 0;
 268 }
 269
 270 /* Called only as a tasklet (software IRQ), by libipw_rx */
 271 static int
 272 libipw_rx_frame_decrypt(struct libipw_device *ieee, struct sk_buff *skb,
 273                            struct lib80211_crypt_data *crypt)
 274 {
 275         struct libipw_hdr_3addr *hdr;
 276         int res, hdrlen;
 277
 278         if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
 279                 return 0;
 280
 281         hdr = (struct libipw_hdr_3addr *)skb->data;
 282         hdrlen = libipw_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 283
 284         atomic_inc(&crypt->refcnt);
 285         res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
 286         atomic_dec(&crypt->refcnt);
 287         if (res < 0) {
 288                 LIBIPW_DEBUG_DROP("decryption failed (SA=%pM) res=%d\n",
 289                                      hdr->addr2, res);
 290                 if (res == -2)
 291                         LIBIPW_DEBUG_DROP("Decryption failed ICV "
 292                                              "mismatch (key %d)\n",
 293                                              skb->data[hdrlen + 3] >> 6);
 294                 ieee->ieee_stats.rx_discards_undecryptable++;
 295                 return -1;
 296         }
 297
 298         return res;
 299 }
 300
 301 /* Called only as a tasklet (software IRQ), by libipw_rx */
 302 static int
 303 libipw_rx_frame_decrypt_msdu(struct libipw_device *ieee,
 304                                 struct sk_buff *skb, int keyidx,
 305                                 struct lib80211_crypt_data *crypt)
 306 {
 307         struct libipw_hdr_3addr *hdr;
 308         int res, hdrlen;
 309
 310         if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
 311                 return 0;
 312
 313         hdr = (struct libipw_hdr_3addr *)skb->data;
 314         hdrlen = libipw_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 315
 316         atomic_inc(&crypt->refcnt);
 317         res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
 318         atomic_dec(&crypt->refcnt);
 319         if (res < 0) {
 320                 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
 321                        " (SA=%pM keyidx=%d)\n", ieee->dev->name, hdr->addr2,
 322                        keyidx);
 323                 return -1;
 324         }
 325
 326         return 0;
 327 }
 328
 329 /* All received frames are sent to this function. @skb contains the frame in
 330  * IEEE 802.11 format, i.e., in the format it was sent over air.
 331  * This function is called only as a tasklet (software IRQ). */
 332 int libipw_rx(struct libipw_device *ieee, struct sk_buff *skb,
 333                  struct libipw_rx_stats *rx_stats)
 334 {
 335         struct net_device *dev = ieee->dev;
 336         struct libipw_hdr_4addr *hdr;
 337         size_t hdrlen;
 338         u16 fc, type, stype, sc;
 339         unsigned int frag;
 340         u8 *payload;
 341         u16 ethertype;
 342 #ifdef NOT_YET
 343         struct net_device *wds = NULL;
 344         struct sk_buff *skb2 = NULL;
 345         struct net_device *wds = NULL;
 346         int frame_authorized = 0;
 347         int from_assoc_ap = 0;
 348         void *sta = NULL;
 349 #endif
 350         u8 dst[ETH_ALEN];
 351         u8 src[ETH_ALEN];
 352         struct lib80211_crypt_data *crypt = NULL;
 353         int keyidx = 0;
 354         int can_be_decrypted = 0;
 355
 356         hdr = (struct libipw_hdr_4addr *)skb->data;
 357         if (skb->len < 10) {
 358                 printk(KERN_INFO "%s: SKB length < 10\n", dev->name);
 359                 goto rx_dropped;
 360         }
 361
 362         fc = le16_to_cpu(hdr->frame_ctl);
 363         type = WLAN_FC_GET_TYPE(fc);
 364         stype = WLAN_FC_GET_STYPE(fc);
 365         sc = le16_to_cpu(hdr->seq_ctl);
 366         frag = WLAN_GET_SEQ_FRAG(sc);
 367         hdrlen = libipw_get_hdrlen(fc);
 368
 369         if (skb->len < hdrlen) {
 370                 printk(KERN_INFO "%s: invalid SKB length %d\n",
 371                         dev->name, skb->len);
 372                 goto rx_dropped;
 373         }
 374
 375         /* Put this code here so that we avoid duplicating it in all
 376          * Rx paths. - Jean II */
 377 #ifdef CONFIG_WIRELESS_EXT
 378 #ifdef IW_WIRELESS_SPY          /* defined in iw_handler.h */
 379         /* If spy monitoring on */
 380         if (ieee->spy_data.spy_number > 0) {
 381                 struct iw_quality wstats;
 382
 383                 wstats.updated = 0;
 384                 if (rx_stats->mask & LIBIPW_STATMASK_RSSI) {
 385                         wstats.level = rx_stats->signal;
 386                         wstats.updated |= IW_QUAL_LEVEL_UPDATED;
 387                 } else
 388                         wstats.updated |= IW_QUAL_LEVEL_INVALID;
 389
 390                 if (rx_stats->mask & LIBIPW_STATMASK_NOISE) {
 391                         wstats.noise = rx_stats->noise;
 392                         wstats.updated |= IW_QUAL_NOISE_UPDATED;
 393                 } else
 394                         wstats.updated |= IW_QUAL_NOISE_INVALID;
 395
 396                 if (rx_stats->mask & LIBIPW_STATMASK_SIGNAL) {
 397                         wstats.qual = rx_stats->signal;
 398                         wstats.updated |= IW_QUAL_QUAL_UPDATED;
 399                 } else
 400                         wstats.updated |= IW_QUAL_QUAL_INVALID;
 401
 402                 /* Update spy records */
 403                 wireless_spy_update(ieee->dev, hdr->addr2, &wstats);
 404         }
 405 #endif                          /* IW_WIRELESS_SPY */
 406 #endif                          /* CONFIG_WIRELESS_EXT */
 407
 408 #ifdef NOT_YET
 409         hostap_update_rx_stats(local->ap, hdr, rx_stats);
 410 #endif
 411
 412         if (ieee->iw_mode == IW_MODE_MONITOR) {
 413                 dev->stats.rx_packets++;
 414                 dev->stats.rx_bytes += skb->len;
 415                 libipw_monitor_rx(ieee, skb, rx_stats);
 416                 return 1;
 417         }
 418
 419         can_be_decrypted = (is_multicast_ether_addr(hdr->addr1) ||
 420                             is_broadcast_ether_addr(hdr->addr2)) ?
 421             ieee->host_mc_decrypt : ieee->host_decrypt;
 422
 423         if (can_be_decrypted) {
 424                 if (skb->len >= hdrlen + 3) {
 425                         /* Top two-bits of byte 3 are the key index */
 426                         keyidx = skb->data[hdrlen + 3] >> 6;
 427                 }
 428
 429                 /* ieee->crypt[] is WEP_KEY (4) in length.  Given that keyidx
 430                  * is only allowed 2-bits of storage, no value of keyidx can
 431                  * be provided via above code that would result in keyidx
 432                  * being out of range */
 433                 crypt = ieee->crypt_info.crypt[keyidx];
 434
 435 #ifdef NOT_YET
 436                 sta = NULL;
 437
 438                 /* Use station specific key to override default keys if the
 439                  * receiver address is a unicast address ("individual RA"). If
 440                  * bcrx_sta_key parameter is set, station specific key is used
 441                  * even with broad/multicast targets (this is against IEEE
 442                  * 802.11, but makes it easier to use different keys with
 443                  * stations that do not support WEP key mapping). */
 444
 445                 if (is_unicast_ether_addr(hdr->addr1) || local->bcrx_sta_key)
 446                         (void)hostap_handle_sta_crypto(local, hdr, &crypt,
 447                                                        &sta);
 448 #endif
 449
 450                 /* allow NULL decrypt to indicate an station specific override
 451                  * for default encryption */
 452                 if (crypt && (crypt->ops == NULL ||
 453                               crypt->ops->decrypt_mpdu == NULL))
 454                         crypt = NULL;
 455
 456                 if (!crypt && (fc & IEEE80211_FCTL_PROTECTED)) {
 457                         /* This seems to be triggered by some (multicast?)
 458                          * frames from other than current BSS, so just drop the
 459                          * frames silently instead of filling system log with
 460                          * these reports. */
 461                         LIBIPW_DEBUG_DROP("Decryption failed (not set)"
 462                                              " (SA=%pM)\n", hdr->addr2);
 463                         ieee->ieee_stats.rx_discards_undecryptable++;
 464                         goto rx_dropped;
 465                 }
 466         }
 467 #ifdef NOT_YET
 468         if (type != WLAN_FC_TYPE_DATA) {
 469                 if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_AUTH &&
 470                     fc & IEEE80211_FCTL_PROTECTED && ieee->host_decrypt &&
 471                     (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0) {
 472                         printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
 473                                "from %pM\n", dev->name, hdr->addr2);
 474                         /* TODO: could inform hostapd about this so that it
 475                          * could send auth failure report */
 476                         goto rx_dropped;
 477                 }
 478
 479                 if (libipw_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
 480                         goto rx_dropped;
 481                 else
 482                         goto rx_exit;
 483         }
 484 #endif
 485         /* drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.29) */
 486         if (sc == ieee->prev_seq_ctl)
 487                 goto rx_dropped;
 488         else
 489                 ieee->prev_seq_ctl = sc;
 490
 491         /* Data frame - extract src/dst addresses */
 492         if (skb->len < LIBIPW_3ADDR_LEN)
 493                 goto rx_dropped;
 494
 495         switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
 496         case IEEE80211_FCTL_FROMDS:
 497                 memcpy(dst, hdr->addr1, ETH_ALEN);
 498                 memcpy(src, hdr->addr3, ETH_ALEN);
 499                 break;
 500         case IEEE80211_FCTL_TODS:
 501                 memcpy(dst, hdr->addr3, ETH_ALEN);
 502                 memcpy(src, hdr->addr2, ETH_ALEN);
 503                 break;
 504         case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
 505                 if (skb->len < LIBIPW_4ADDR_LEN)
 506                         goto rx_dropped;
 507                 memcpy(dst, hdr->addr3, ETH_ALEN);
 508                 memcpy(src, hdr->addr4, ETH_ALEN);
 509                 break;
 510         case 0:
 511                 memcpy(dst, hdr->addr1, ETH_ALEN);
 512                 memcpy(src, hdr->addr2, ETH_ALEN);
 513                 break;
 514         }
 515
 516 #ifdef NOT_YET
 517         if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
 518                 goto rx_dropped;
 519         if (wds) {
 520                 skb->dev = dev = wds;
 521                 stats = hostap_get_stats(dev);
 522         }
 523
 524         if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
 525             (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 526             IEEE80211_FCTL_FROMDS && ieee->stadev &&
 527             ether_addr_equal(hdr->addr2, ieee->assoc_ap_addr)) {
 528                 /* Frame from BSSID of the AP for which we are a client */
 529                 skb->dev = dev = ieee->stadev;
 530                 stats = hostap_get_stats(dev);
 531                 from_assoc_ap = 1;
 532         }
 533 #endif
 534
 535 #ifdef NOT_YET
 536         if ((ieee->iw_mode == IW_MODE_MASTER ||
 537              ieee->iw_mode == IW_MODE_REPEAT) && !from_assoc_ap) {
 538                 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
 539                                              wds != NULL)) {
 540                 case AP_RX_CONTINUE_NOT_AUTHORIZED:
 541                         frame_authorized = 0;
 542                         break;
 543                 case AP_RX_CONTINUE:
 544                         frame_authorized = 1;
 545                         break;
 546                 case AP_RX_DROP:
 547                         goto rx_dropped;
 548                 case AP_RX_EXIT:
 549                         goto rx_exit;
 550                 }
 551         }
 552 #endif
 553
 554         /* Nullfunc frames may have PS-bit set, so they must be passed to
 555          * hostap_handle_sta_rx() before being dropped here. */
 556
 557         stype &= ~IEEE80211_STYPE_QOS_DATA;
 558
 559         if (stype != IEEE80211_STYPE_DATA &&
 560             stype != IEEE80211_STYPE_DATA_CFACK &&
 561             stype != IEEE80211_STYPE_DATA_CFPOLL &&
 562             stype != IEEE80211_STYPE_DATA_CFACKPOLL) {
 563                 if (stype != IEEE80211_STYPE_NULLFUNC)
 564                         LIBIPW_DEBUG_DROP("RX: dropped data frame "
 565                                              "with no data (type=0x%02x, "
 566                                              "subtype=0x%02x, len=%d)\n",
 567                                              type, stype, skb->len);
 568                 goto rx_dropped;
 569         }
 570
 571         /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
 572
 573         if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 574             (keyidx = libipw_rx_frame_decrypt(ieee, skb, crypt)) < 0)
 575                 goto rx_dropped;
 576
 577         hdr = (struct libipw_hdr_4addr *)skb->data;
 578
 579         /* skb: hdr + (possibly fragmented) plaintext payload */
 580         // PR: FIXME: hostap has additional conditions in the "if" below:
 581         // ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
 582         if ((frag != 0) || (fc & IEEE80211_FCTL_MOREFRAGS)) {
 583                 int flen;
 584                 struct sk_buff *frag_skb = libipw_frag_cache_get(ieee, hdr);
 585                 LIBIPW_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
 586
 587                 if (!frag_skb) {
 588                         LIBIPW_DEBUG(LIBIPW_DL_RX | LIBIPW_DL_FRAG,
 589                                         "Rx cannot get skb from fragment "
 590                                         "cache (morefrag=%d seq=%u frag=%u)\n",
 591                                         (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
 592                                         WLAN_GET_SEQ_SEQ(sc), frag);
 593                         goto rx_dropped;
 594                 }
 595
 596                 flen = skb->len;
 597                 if (frag != 0)
 598                         flen -= hdrlen;
 599
 600                 if (frag_skb->tail + flen > frag_skb->end) {
 601                         printk(KERN_WARNING "%s: host decrypted and "
 602                                "reassembled frame did not fit skb\n",
 603                                dev->name);
 604                         libipw_frag_cache_invalidate(ieee, hdr);
 605                         goto rx_dropped;
 606                 }
 607
 608                 if (frag == 0) {
 609                         /* copy first fragment (including full headers) into
 610                          * beginning of the fragment cache skb */
 611                         skb_copy_from_linear_data(skb, skb_put(frag_skb, flen), flen);
 612                 } else {
 613                         /* append frame payload to the end of the fragment
 614                          * cache skb */
 615                         skb_copy_from_linear_data_offset(skb, hdrlen,
 616                                       skb_put(frag_skb, flen), flen);
 617                 }
 618                 dev_kfree_skb_any(skb);
 619                 skb = NULL;
 620
 621                 if (fc & IEEE80211_FCTL_MOREFRAGS) {
 622                         /* more fragments expected - leave the skb in fragment
 623                          * cache for now; it will be delivered to upper layers
 624                          * after all fragments have been received */
 625                         goto rx_exit;
 626                 }
 627
 628                 /* this was the last fragment and the frame will be
 629                  * delivered, so remove skb from fragment cache */
 630                 skb = frag_skb;
 631                 hdr = (struct libipw_hdr_4addr *)skb->data;
 632                 libipw_frag_cache_invalidate(ieee, hdr);
 633         }
 634
 635         /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
 636          * encrypted/authenticated */
 637         if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 638             libipw_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
 639                 goto rx_dropped;
 640
 641         hdr = (struct libipw_hdr_4addr *)skb->data;
 642         if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) {
 643                 if (            /*ieee->ieee802_1x && */
 644                            libipw_is_eapol_frame(ieee, skb)) {
 645                         /* pass unencrypted EAPOL frames even if encryption is
 646                          * configured */
 647                 } else {
 648                         LIBIPW_DEBUG_DROP("encryption configured, but RX "
 649                                              "frame not encrypted (SA=%pM)\n",
 650                                              hdr->addr2);
 651                         goto rx_dropped;
 652                 }
 653         }
 654
 655         if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep &&
 656             !libipw_is_eapol_frame(ieee, skb)) {
 657                 LIBIPW_DEBUG_DROP("dropped unencrypted RX data "
 658                                      "frame from %pM (drop_unencrypted=1)\n",
 659                                      hdr->addr2);
 660                 goto rx_dropped;
 661         }
 662
 663         /* If the frame was decrypted in hardware, we may need to strip off
 664          * any security data (IV, ICV, etc) that was left behind */
 665         if (!can_be_decrypted && (fc & IEEE80211_FCTL_PROTECTED) &&
 666             ieee->host_strip_iv_icv) {
 667                 int trimlen = 0;
 668
 669                 /* Top two-bits of byte 3 are the key index */
 670                 if (skb->len >= hdrlen + 3)
 671                         keyidx = skb->data[hdrlen + 3] >> 6;
 672
 673                 /* To strip off any security data which appears before the
 674                  * payload, we simply increase hdrlen (as the header gets
 675                  * chopped off immediately below). For the security data which
 676                  * appears after the payload, we use skb_trim. */
 677
 678                 switch (ieee->sec.encode_alg[keyidx]) {
 679                 case SEC_ALG_WEP:
 680                         /* 4 byte IV */
 681                         hdrlen += 4;
 682                         /* 4 byte ICV */
 683                         trimlen = 4;
 684                         break;
 685                 case SEC_ALG_TKIP:
 686                         /* 4 byte IV, 4 byte ExtIV */
 687                         hdrlen += 8;
 688                         /* 8 byte MIC, 4 byte ICV */
 689                         trimlen = 12;
 690                         break;
 691                 case SEC_ALG_CCMP:
 692                         /* 8 byte CCMP header */
 693                         hdrlen += 8;
 694                         /* 8 byte MIC */
 695                         trimlen = 8;
 696                         break;
 697                 }
 698
 699                 if (skb->len < trimlen)
 700                         goto rx_dropped;
 701
 702                 __skb_trim(skb, skb->len - trimlen);
 703
 704                 if (skb->len < hdrlen)
 705                         goto rx_dropped;
 706         }
 707
 708         /* skb: hdr + (possible reassembled) full plaintext payload */
 709
 710         payload = skb->data + hdrlen;
 711         ethertype = (payload[6] << 8) | payload[7];
 712
 713 #ifdef NOT_YET
 714         /* If IEEE 802.1X is used, check whether the port is authorized to send
 715          * the received frame. */
 716         if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) {
 717                 if (ethertype == ETH_P_PAE) {
 718                         printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n",
 719                                dev->name);
 720                         if (ieee->hostapd && ieee->apdev) {
 721                                 /* Send IEEE 802.1X frames to the user
 722                                  * space daemon for processing */
 723                                 prism2_rx_80211(ieee->apdev, skb, rx_stats,
 724                                                 PRISM2_RX_MGMT);
 725                                 ieee->apdevstats.rx_packets++;
 726                                 ieee->apdevstats.rx_bytes += skb->len;
 727                                 goto rx_exit;
 728                         }
 729                 } else if (!frame_authorized) {
 730                         printk(KERN_DEBUG "%s: dropped frame from "
 731                                "unauthorized port (IEEE 802.1X): "
 732                                "ethertype=0x%04x\n", dev->name, ethertype);
 733                         goto rx_dropped;
 734                 }
 735         }
 736 #endif
 737
 738         /* convert hdr + possible LLC headers into Ethernet header */
 739         if (skb->len - hdrlen >= 8 &&
 740             ((memcmp(payload, libipw_rfc1042_header, SNAP_SIZE) == 0 &&
 741               ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
 742              memcmp(payload, libipw_bridge_tunnel_header, SNAP_SIZE) == 0)) {
 743                 /* remove RFC1042 or Bridge-Tunnel encapsulation and
 744                  * replace EtherType */
 745                 skb_pull(skb, hdrlen + SNAP_SIZE);
 746                 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 747                 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 748         } else {
 749                 __be16 len;
 750                 /* Leave Ethernet header part of hdr and full payload */
 751                 skb_pull(skb, hdrlen);
 752                 len = htons(skb->len);
 753                 memcpy(skb_push(skb, 2), &len, 2);
 754                 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 755                 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 756         }
 757
 758 #ifdef NOT_YET
 759         if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 760                     IEEE80211_FCTL_TODS) && skb->len >= ETH_HLEN + ETH_ALEN) {
 761                 /* Non-standard frame: get addr4 from its bogus location after
 762                  * the payload */
 763                 skb_copy_to_linear_data_offset(skb, ETH_ALEN,
 764                                                skb->data + skb->len - ETH_ALEN,
 765                                                ETH_ALEN);
 766                 skb_trim(skb, skb->len - ETH_ALEN);
 767         }
 768 #endif
 769
 770         dev->stats.rx_packets++;
 771         dev->stats.rx_bytes += skb->len;
 772
 773 #ifdef NOT_YET
 774         if (ieee->iw_mode == IW_MODE_MASTER && !wds && ieee->ap->bridge_packets) {
 775                 if (is_multicast_ether_addr(dst)) {
 776                         /* copy multicast frame both to the higher layers and
 777                          * to the wireless media */
 778                         ieee->ap->bridged_multicast++;
 779                         skb2 = skb_clone(skb, GFP_ATOMIC);
 780                         if (skb2 == NULL)
 781                                 printk(KERN_DEBUG "%s: skb_clone failed for "
 782                                        "multicast frame\n", dev->name);
 783                 } else if (hostap_is_sta_assoc(ieee->ap, dst)) {
 784                         /* send frame directly to the associated STA using
 785                          * wireless media and not passing to higher layers */
 786                         ieee->ap->bridged_unicast++;
 787                         skb2 = skb;
 788                         skb = NULL;
 789                 }
 790         }
 791
 792         if (skb2 != NULL) {
 793                 /* send to wireless media */
 794                 skb2->dev = dev;
 795                 skb2->protocol = htons(ETH_P_802_3);
 796                 skb_reset_mac_header(skb2);
 797                 skb_reset_network_header(skb2);
 798                 /* skb2->network_header += ETH_HLEN; */
 799                 dev_queue_xmit(skb2);
 800         }
 801 #endif
 802
 803         if (skb) {
 804                 skb->protocol = eth_type_trans(skb, dev);
 805                 memset(skb->cb, 0, sizeof(skb->cb));
 806                 skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
 807                 if (netif_rx(skb) == NET_RX_DROP) {
 808                         /* netif_rx always succeeds, but it might drop
 809                          * the packet.  If it drops the packet, we log that
 810                          * in our stats. */
 811                         LIBIPW_DEBUG_DROP
 812                             ("RX: netif_rx dropped the packet\n");
 813                         dev->stats.rx_dropped++;
 814                 }
 815         }
 816
 817       rx_exit:
 818 #ifdef NOT_YET
 819         if (sta)
 820                 hostap_handle_sta_release(sta);
 821 #endif
 822         return 1;
 823
 824       rx_dropped:
 825         dev->stats.rx_dropped++;
 826
 827         /* Returning 0 indicates to caller that we have not handled the SKB--
 828          * so it is still allocated and can be used again by underlying
 829          * hardware as a DMA target */
 830         return 0;
 831 }
 832
 833 /* Filter out unrelated packets, call libipw_rx[_mgt]
 834  * This function takes over the skb, it should not be used again after calling
 835  * this function. */
 836 void libipw_rx_any(struct libipw_device *ieee,
 837                      struct sk_buff *skb, struct libipw_rx_stats *stats)
 838 {
 839         struct libipw_hdr_4addr *hdr;
 840         int is_packet_for_us;
 841         u16 fc;
 842
 843         if (ieee->iw_mode == IW_MODE_MONITOR) {
 844                 if (!libipw_rx(ieee, skb, stats))
 845                         dev_kfree_skb_irq(skb);
 846                 return;
 847         }
 848
 849         if (skb->len < sizeof(struct ieee80211_hdr))
 850                 goto drop_free;
 851
 852         hdr = (struct libipw_hdr_4addr *)skb->data;
 853         fc = le16_to_cpu(hdr->frame_ctl);
 854
 855         if ((fc & IEEE80211_FCTL_VERS) != 0)
 856                 goto drop_free;
 857
 858         switch (fc & IEEE80211_FCTL_FTYPE) {
 859         case IEEE80211_FTYPE_MGMT:
 860                 if (skb->len < sizeof(struct libipw_hdr_3addr))
 861                         goto drop_free;
 862                 libipw_rx_mgt(ieee, hdr, stats);
 863                 dev_kfree_skb_irq(skb);
 864                 return;
 865         case IEEE80211_FTYPE_DATA:
 866                 break;
 867         case IEEE80211_FTYPE_CTL:
 868                 return;
 869         default:
 870                 return;
 871         }
 872
 873         is_packet_for_us = 0;
 874         switch (ieee->iw_mode) {
 875         case IW_MODE_ADHOC:
 876                 /* our BSS and not from/to DS */
 877                 if (ether_addr_equal(hdr->addr3, ieee->bssid))
 878                 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == 0) {
 879                         /* promisc: get all */
 880                         if (ieee->dev->flags & IFF_PROMISC)
 881                                 is_packet_for_us = 1;
 882                         /* to us */
 883                         else if (ether_addr_equal(hdr->addr1, ieee->dev->dev_addr))
 884                                 is_packet_for_us = 1;
 885                         /* mcast */
 886                         else if (is_multicast_ether_addr(hdr->addr1))
 887                                 is_packet_for_us = 1;
 888                 }
 889                 break;
 890         case IW_MODE_INFRA:
 891                 /* our BSS (== from our AP) and from DS */
 892                 if (ether_addr_equal(hdr->addr2, ieee->bssid))
 893                 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS) {
 894                         /* promisc: get all */
 895                         if (ieee->dev->flags & IFF_PROMISC)
 896                                 is_packet_for_us = 1;
 897                         /* to us */
 898                         else if (ether_addr_equal(hdr->addr1, ieee->dev->dev_addr))
 899                                 is_packet_for_us = 1;
 900                         /* mcast */
 901                         else if (is_multicast_ether_addr(hdr->addr1)) {
 902                                 /* not our own packet bcasted from AP */
 903                                 if (!ether_addr_equal(hdr->addr3, ieee->dev->dev_addr))
 904                                         is_packet_for_us = 1;
 905                         }
 906                 }
 907                 break;
 908         default:
 909                 /* ? */
 910                 break;
 911         }
 912
 913         if (is_packet_for_us)
 914                 if (!libipw_rx(ieee, skb, stats))
 915                         dev_kfree_skb_irq(skb);
 916         return;
 917
 918 drop_free:
 919         dev_kfree_skb_irq(skb);
 920         ieee->dev->stats.rx_dropped++;
 921 }
 922
 923 #define MGMT_FRAME_FIXED_PART_LENGTH            0x24
 924
 925 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
 926
 927 /*
 928 * Make the structure we read from the beacon packet to have
 929 * the right values
 930 */
 931 static int libipw_verify_qos_info(struct libipw_qos_information_element
 932                                      *info_element, int sub_type)
 933 {
 934
 935         if (info_element->qui_subtype != sub_type)
 936                 return -1;
 937         if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
 938                 return -1;
 939         if (info_element->qui_type != QOS_OUI_TYPE)
 940                 return -1;
 941         if (info_element->version != QOS_VERSION_1)
 942                 return -1;
 943
 944         return 0;
 945 }
 946
 947 /*
 948  * Parse a QoS parameter element
 949  */
 950 static int libipw_read_qos_param_element(struct libipw_qos_parameter_info
 951                                             *element_param, struct libipw_info_element
 952                                             *info_element)
 953 {
 954         int ret = 0;
 955         u16 size = sizeof(struct libipw_qos_parameter_info) - 2;
 956
 957         if ((info_element == NULL) || (element_param == NULL))
 958                 return -1;
 959
 960         if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
 961                 memcpy(element_param->info_element.qui, info_element->data,
 962                        info_element->len);
 963                 element_param->info_element.elementID = info_element->id;
 964                 element_param->info_element.length = info_element->len;
 965         } else
 966                 ret = -1;
 967         if (ret == 0)
 968                 ret = libipw_verify_qos_info(&element_param->info_element,
 969                                                 QOS_OUI_PARAM_SUB_TYPE);
 970         return ret;
 971 }
 972
 973 /*
 974  * Parse a QoS information element
 975  */
 976 static int libipw_read_qos_info_element(struct
 977                                            libipw_qos_information_element
 978                                            *element_info, struct libipw_info_element
 979                                            *info_element)
 980 {
 981         int ret = 0;
 982         u16 size = sizeof(struct libipw_qos_information_element) - 2;
 983
 984         if (element_info == NULL)
 985                 return -1;
 986         if (info_element == NULL)
 987                 return -1;
 988
 989         if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
 990                 memcpy(element_info->qui, info_element->data,
 991                        info_element->len);
 992                 element_info->elementID = info_element->id;
 993                 element_info->length = info_element->len;
 994         } else
 995                 ret = -1;
 996
 997         if (ret == 0)
 998                 ret = libipw_verify_qos_info(element_info,
 999                                                 QOS_OUI_INFO_SUB_TYPE);
1000         return ret;
1001 }
1002
1003 /*
1004  * Write QoS parameters from the ac parameters.
1005  */
1006 static int libipw_qos_convert_ac_to_parameters(struct
1007                                                   libipw_qos_parameter_info
1008                                                   *param_elm, struct
1009                                                   libipw_qos_parameters
1010                                                   *qos_param)
1011 {
1012         int rc = 0;
1013         int i;
1014         struct libipw_qos_ac_parameter *ac_params;
1015         u32 txop;
1016         u8 cw_min;
1017         u8 cw_max;
1018
1019         for (i = 0; i < QOS_QUEUE_NUM; i++) {
1020                 ac_params = &(param_elm->ac_params_record[i]);
1021
1022                 qos_param->aifs[i] = (ac_params->aci_aifsn) & 0x0F;
1023                 qos_param->aifs[i] -= (qos_param->aifs[i] < 2) ? 0 : 2;
1024
1025                 cw_min = ac_params->ecw_min_max & 0x0F;
1026                 qos_param->cw_min[i] = cpu_to_le16((1 << cw_min) - 1);
1027
1028                 cw_max = (ac_params->ecw_min_max & 0xF0) >> 4;
1029                 qos_param->cw_max[i] = cpu_to_le16((1 << cw_max) - 1);
1030
1031                 qos_param->flag[i] =
1032                     (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1033
1034                 txop = le16_to_cpu(ac_params->tx_op_limit) * 32;
1035                 qos_param->tx_op_limit[i] = cpu_to_le16(txop);
1036         }
1037         return rc;
1038 }
1039
1040 /*
1041  * we have a generic data element which it may contain QoS information or
1042  * parameters element. check the information element length to decide
1043  * which type to read
1044  */
1045 static int libipw_parse_qos_info_param_IE(struct libipw_info_element
1046                                              *info_element,
1047                                              struct libipw_network *network)
1048 {
1049         int rc = 0;
1050         struct libipw_qos_parameters *qos_param = NULL;
1051         struct libipw_qos_information_element qos_info_element;
1052
1053         rc = libipw_read_qos_info_element(&qos_info_element, info_element);
1054
1055         if (rc == 0) {
1056                 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1057                 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1058         } else {
1059                 struct libipw_qos_parameter_info param_element;
1060
1061                 rc = libipw_read_qos_param_element(&param_element,
1062                                                       info_element);
1063                 if (rc == 0) {
1064                         qos_param = &(network->qos_data.parameters);
1065                         libipw_qos_convert_ac_to_parameters(&param_element,
1066                                                                qos_param);
1067                         network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1068                         network->qos_data.param_count =
1069                             param_element.info_element.ac_info & 0x0F;
1070                 }
1071         }
1072
1073         if (rc == 0) {
1074                 LIBIPW_DEBUG_QOS("QoS is supported\n");
1075                 network->qos_data.supported = 1;
1076         }
1077         return rc;
1078 }
1079
1080 #ifdef CONFIG_LIBIPW_DEBUG
1081 #define MFIE_STRING(x) case WLAN_EID_ ##x: return #x
1082
1083 static const char *get_info_element_string(u16 id)
1084 {
1085         switch (id) {
1086                 MFIE_STRING(SSID);
1087                 MFIE_STRING(SUPP_RATES);
1088                 MFIE_STRING(FH_PARAMS);
1089                 MFIE_STRING(DS_PARAMS);
1090                 MFIE_STRING(CF_PARAMS);
1091                 MFIE_STRING(TIM);
1092                 MFIE_STRING(IBSS_PARAMS);
1093                 MFIE_STRING(COUNTRY);
1094                 MFIE_STRING(REQUEST);
1095                 MFIE_STRING(CHALLENGE);
1096                 MFIE_STRING(PWR_CONSTRAINT);
1097                 MFIE_STRING(PWR_CAPABILITY);
1098                 MFIE_STRING(TPC_REQUEST);
1099                 MFIE_STRING(TPC_REPORT);
1100                 MFIE_STRING(SUPPORTED_CHANNELS);
1101                 MFIE_STRING(CHANNEL_SWITCH);
1102                 MFIE_STRING(MEASURE_REQUEST);
1103                 MFIE_STRING(MEASURE_REPORT);
1104                 MFIE_STRING(QUIET);
1105                 MFIE_STRING(IBSS_DFS);
1106                 MFIE_STRING(ERP_INFO);
1107                 MFIE_STRING(RSN);
1108                 MFIE_STRING(EXT_SUPP_RATES);
1109                 MFIE_STRING(VENDOR_SPECIFIC);
1110                 MFIE_STRING(QOS_PARAMETER);
1111         default:
1112                 return "UNKNOWN";
1113         }
1114 }
1115 #endif
1116
1117 static int libipw_parse_info_param(struct libipw_info_element
1118                                       *info_element, u16 length,
1119                                       struct libipw_network *network)
1120 {
1121         u8 i;
1122 #ifdef CONFIG_LIBIPW_DEBUG
1123         char rates_str[64];
1124         char *p;
1125 #endif
1126
1127         while (length >= sizeof(*info_element)) {
1128                 if (sizeof(*info_element) + info_element->len > length) {
1129                         LIBIPW_DEBUG_MGMT("Info elem: parse failed: "
1130                                              "info_element->len + 2 > left : "
1131                                              "info_element->len+2=%zd left=%d, id=%d.\n",
1132                                              info_element->len +
1133                                              sizeof(*info_element),
1134                                              length, info_element->id);
1135                         /* We stop processing but don't return an error here
1136                          * because some misbehaviour APs break this rule. ie.
1137                          * Orinoco AP1000. */
1138                         break;
1139                 }
1140
1141                 switch (info_element->id) {
1142                 case WLAN_EID_SSID:
1143                         network->ssid_len = min(info_element->len,
1144                                                 (u8) IW_ESSID_MAX_SIZE);
1145                         memcpy(network->ssid, info_element->data,
1146                                network->ssid_len);
1147                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
1148                                 memset(network->ssid + network->ssid_len, 0,
1149                                        IW_ESSID_MAX_SIZE - network->ssid_len);
1150
1151                         LIBIPW_DEBUG_MGMT("WLAN_EID_SSID: '%*pE' len=%d.\n",
1152                                           network->ssid_len, network->ssid,
1153                                           network->ssid_len);
1154                         break;
1155
1156                 case WLAN_EID_SUPP_RATES:
1157 #ifdef CONFIG_LIBIPW_DEBUG
1158                         p = rates_str;
1159 #endif
1160                         network->rates_len = min(info_element->len,
1161                                                  MAX_RATES_LENGTH);
1162                         for (i = 0; i < network->rates_len; i++) {
1163                                 network->rates[i] = info_element->data[i];
1164 #ifdef CONFIG_LIBIPW_DEBUG
1165                                 p += snprintf(p, sizeof(rates_str) -
1166                                               (p - rates_str), "%02X ",
1167                                               network->rates[i]);
1168 #endif
1169                                 if (libipw_is_ofdm_rate
1170                                     (info_element->data[i])) {
1171                                         network->flags |= NETWORK_HAS_OFDM;
1172                                         if (info_element->data[i] &
1173                                             LIBIPW_BASIC_RATE_MASK)
1174                                                 network->flags &=
1175                                                     ~NETWORK_HAS_CCK;
1176                                 }
1177                         }
1178
1179                         LIBIPW_DEBUG_MGMT("WLAN_EID_SUPP_RATES: '%s' (%d)\n",
1180                                              rates_str, network->rates_len);
1181                         break;
1182
1183                 case WLAN_EID_EXT_SUPP_RATES:
1184 #ifdef CONFIG_LIBIPW_DEBUG
1185                         p = rates_str;
1186 #endif
1187                         network->rates_ex_len = min(info_element->len,
1188                                                     MAX_RATES_EX_LENGTH);
1189                         for (i = 0; i < network->rates_ex_len; i++) {
1190                                 network->rates_ex[i] = info_element->data[i];
1191 #ifdef CONFIG_LIBIPW_DEBUG
1192                                 p += snprintf(p, sizeof(rates_str) -
1193                                               (p - rates_str), "%02X ",
1194                                               network->rates_ex[i]);
1195 #endif
1196                                 if (libipw_is_ofdm_rate
1197                                     (info_element->data[i])) {
1198                                         network->flags |= NETWORK_HAS_OFDM;
1199                                         if (info_element->data[i] &
1200                                             LIBIPW_BASIC_RATE_MASK)
1201                                                 network->flags &=
1202                                                     ~NETWORK_HAS_CCK;
1203                                 }
1204                         }
1205
1206                         LIBIPW_DEBUG_MGMT("WLAN_EID_EXT_SUPP_RATES: '%s' (%d)\n",
1207                                              rates_str, network->rates_ex_len);
1208                         break;
1209
1210                 case WLAN_EID_DS_PARAMS:
1211                         LIBIPW_DEBUG_MGMT("WLAN_EID_DS_PARAMS: %d\n",
1212                                              info_element->data[0]);
1213                         network->channel = info_element->data[0];
1214                         break;
1215
1216                 case WLAN_EID_FH_PARAMS:
1217                         LIBIPW_DEBUG_MGMT("WLAN_EID_FH_PARAMS: ignored\n");
1218                         break;
1219
1220                 case WLAN_EID_CF_PARAMS:
1221                         LIBIPW_DEBUG_MGMT("WLAN_EID_CF_PARAMS: ignored\n");
1222                         break;
1223
1224                 case WLAN_EID_TIM:
1225                         network->tim.tim_count = info_element->data[0];
1226                         network->tim.tim_period = info_element->data[1];
1227                         LIBIPW_DEBUG_MGMT("WLAN_EID_TIM: partially ignored\n");
1228                         break;
1229
1230                 case WLAN_EID_ERP_INFO:
1231                         network->erp_value = info_element->data[0];
1232                         network->flags |= NETWORK_HAS_ERP_VALUE;
1233                         LIBIPW_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1234                                              network->erp_value);
1235                         break;
1236
1237                 case WLAN_EID_IBSS_PARAMS:
1238                         network->atim_window = info_element->data[0];
1239                         LIBIPW_DEBUG_MGMT("WLAN_EID_IBSS_PARAMS: %d\n",
1240                                              network->atim_window);
1241                         break;
1242
1243                 case WLAN_EID_CHALLENGE:
1244                         LIBIPW_DEBUG_MGMT("WLAN_EID_CHALLENGE: ignored\n");
1245                         break;
1246
1247                 case WLAN_EID_VENDOR_SPECIFIC:
1248                         LIBIPW_DEBUG_MGMT("WLAN_EID_VENDOR_SPECIFIC: %d bytes\n",
1249                                              info_element->len);
1250                         if (!libipw_parse_qos_info_param_IE(info_element,
1251                                                                network))
1252                                 break;
1253
1254                         if (info_element->len >= 4 &&
1255                             info_element->data[0] == 0x00 &&
1256                             info_element->data[1] == 0x50 &&
1257                             info_element->data[2] == 0xf2 &&
1258                             info_element->data[3] == 0x01) {
1259                                 network->wpa_ie_len = min(info_element->len + 2,
1260                                                           MAX_WPA_IE_LEN);
1261                                 memcpy(network->wpa_ie, info_element,
1262                                        network->wpa_ie_len);
1263                         }
1264                         break;
1265
1266                 case WLAN_EID_RSN:
1267                         LIBIPW_DEBUG_MGMT("WLAN_EID_RSN: %d bytes\n",
1268                                              info_element->len);
1269                         network->rsn_ie_len = min(info_element->len + 2,
1270                                                   MAX_WPA_IE_LEN);
1271                         memcpy(network->rsn_ie, info_element,
1272                                network->rsn_ie_len);
1273                         break;
1274
1275                 case WLAN_EID_QOS_PARAMETER:
1276                         printk(KERN_ERR
1277                                "QoS Error need to parse QOS_PARAMETER IE\n");
1278                         break;
1279                         /* 802.11h */
1280                 case WLAN_EID_PWR_CONSTRAINT:
1281                         network->power_constraint = info_element->data[0];
1282                         network->flags |= NETWORK_HAS_POWER_CONSTRAINT;
1283                         break;
1284
1285                 case WLAN_EID_CHANNEL_SWITCH:
1286                         network->power_constraint = info_element->data[0];
1287                         network->flags |= NETWORK_HAS_CSA;
1288                         break;
1289
1290                 case WLAN_EID_QUIET:
1291                         network->quiet.count = info_element->data[0];
1292                         network->quiet.period = info_element->data[1];
1293                         network->quiet.duration = info_element->data[2];
1294                         network->quiet.offset = info_element->data[3];
1295                         network->flags |= NETWORK_HAS_QUIET;
1296                         break;
1297
1298                 case WLAN_EID_IBSS_DFS:
1299                         network->flags |= NETWORK_HAS_IBSS_DFS;
1300                         break;
1301
1302                 case WLAN_EID_TPC_REPORT:
1303                         network->tpc_report.transmit_power =
1304                             info_element->data[0];
1305                         network->tpc_report.link_margin = info_element->data[1];
1306                         network->flags |= NETWORK_HAS_TPC_REPORT;
1307                         break;
1308
1309                 default:
1310                         LIBIPW_DEBUG_MGMT
1311                             ("Unsupported info element: %s (%d)\n",
1312                              get_info_element_string(info_element->id),
1313                              info_element->id);
1314                         break;
1315                 }
1316
1317                 length -= sizeof(*info_element) + info_element->len;
1318                 info_element =
1319                     (struct libipw_info_element *)&info_element->
1320                     data[info_element->len];
1321         }
1322
1323         return 0;
1324 }
1325
1326 static int libipw_handle_assoc_resp(struct libipw_device *ieee, struct libipw_assoc_response
1327                                        *frame, struct libipw_rx_stats *stats)
1328 {
1329         struct libipw_network network_resp = { };
1330         struct libipw_network *network = &network_resp;
1331         struct net_device *dev = ieee->dev;
1332
1333         network->flags = 0;
1334         network->qos_data.active = 0;
1335         network->qos_data.supported = 0;
1336         network->qos_data.param_count = 0;
1337         network->qos_data.old_param_count = 0;
1338
1339         //network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF);
1340         network->atim_window = le16_to_cpu(frame->aid);
1341         network->listen_interval = le16_to_cpu(frame->status);
1342         memcpy(network->bssid, frame->header.addr3, ETH_ALEN);
1343         network->capability = le16_to_cpu(frame->capability);
1344         network->last_scanned = jiffies;
1345         network->rates_len = network->rates_ex_len = 0;
1346         network->last_associate = 0;
1347         network->ssid_len = 0;
1348         network->erp_value =
1349             (network->capability & WLAN_CAPABILITY_IBSS) ? 0x3 : 0x0;
1350
1351         if (stats->freq == LIBIPW_52GHZ_BAND) {
1352                 /* for A band (No DS info) */
1353                 network->channel = stats->received_channel;
1354         } else
1355                 network->flags |= NETWORK_HAS_CCK;
1356
1357         network->wpa_ie_len = 0;
1358         network->rsn_ie_len = 0;
1359
1360         if (libipw_parse_info_param
1361             (frame->info_element, stats->len - sizeof(*frame), network))
1362                 return 1;
1363
1364         network->mode = 0;
1365         if (stats->freq == LIBIPW_52GHZ_BAND)
1366                 network->mode = IEEE_A;
1367         else {
1368                 if (network->flags & NETWORK_HAS_OFDM)
1369                         network->mode |= IEEE_G;
1370                 if (network->flags & NETWORK_HAS_CCK)
1371                         network->mode |= IEEE_B;
1372         }
1373
1374         memcpy(&network->stats, stats, sizeof(network->stats));
1375
1376         if (ieee->handle_assoc_response != NULL)
1377                 ieee->handle_assoc_response(dev, frame, network);
1378
1379         return 0;
1380 }
1381
1382 /***************************************************/
1383
1384 static int libipw_network_init(struct libipw_device *ieee, struct libipw_probe_response
1385                                          *beacon,
1386                                          struct libipw_network *network,
1387                                          struct libipw_rx_stats *stats)
1388 {
1389         network->qos_data.active = 0;
1390         network->qos_data.supported = 0;
1391         network->qos_data.param_count = 0;
1392         network->qos_data.old_param_count = 0;
1393
1394         /* Pull out fixed field data */
1395         memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
1396         network->capability = le16_to_cpu(beacon->capability);
1397         network->last_scanned = jiffies;
1398         network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
1399         network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
1400         network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
1401         /* Where to pull this? beacon->listen_interval; */
1402         network->listen_interval = 0x0A;
1403         network->rates_len = network->rates_ex_len = 0;
1404         network->last_associate = 0;
1405         network->ssid_len = 0;
1406         network->flags = 0;
1407         network->atim_window = 0;
1408         network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
1409             0x3 : 0x0;
1410
1411         if (stats->freq == LIBIPW_52GHZ_BAND) {
1412                 /* for A band (No DS info) */
1413                 network->channel = stats->received_channel;
1414         } else
1415                 network->flags |= NETWORK_HAS_CCK;
1416
1417         network->wpa_ie_len = 0;
1418         network->rsn_ie_len = 0;
1419
1420         if (libipw_parse_info_param
1421             (beacon->info_element, stats->len - sizeof(*beacon), network))
1422                 return 1;
1423
1424         network->mode = 0;
1425         if (stats->freq == LIBIPW_52GHZ_BAND)
1426                 network->mode = IEEE_A;
1427         else {
1428                 if (network->flags & NETWORK_HAS_OFDM)
1429                         network->mode |= IEEE_G;
1430                 if (network->flags & NETWORK_HAS_CCK)
1431                         network->mode |= IEEE_B;
1432         }
1433
1434         if (network->mode == 0) {
1435                 LIBIPW_DEBUG_SCAN("Filtered out '%*pE (%pM)' network.\n",
1436                                   network->ssid_len, network->ssid,
1437                                   network->bssid);
1438                 return 1;
1439         }
1440
1441         memcpy(&network->stats, stats, sizeof(network->stats));
1442
1443         return 0;
1444 }
1445
1446 static inline int is_same_network(struct libipw_network *src,
1447                                   struct libipw_network *dst)
1448 {
1449         /* A network is only a duplicate if the channel, BSSID, and ESSID
1450          * all match.  We treat all <hidden> with the same BSSID and channel
1451          * as one network */
1452         return ((src->ssid_len == dst->ssid_len) &&
1453                 (src->channel == dst->channel) &&
1454                 ether_addr_equal_64bits(src->bssid, dst->bssid) &&
1455                 !memcmp(src->ssid, dst->ssid, src->ssid_len));
1456 }
1457
1458 static void update_network(struct libipw_network *dst,
1459                                   struct libipw_network *src)
1460 {
1461         int qos_active;
1462         u8 old_param;
1463
1464         /* We only update the statistics if they were created by receiving
1465          * the network information on the actual channel the network is on.
1466          *
1467          * This keeps beacons received on neighbor channels from bringing
1468          * down the signal level of an AP. */
1469         if (dst->channel == src->stats.received_channel)
1470                 memcpy(&dst->stats, &src->stats,
1471                        sizeof(struct libipw_rx_stats));
1472         else
1473                 LIBIPW_DEBUG_SCAN("Network %pM info received "
1474                         "off channel (%d vs. %d)\n", src->bssid,
1475                         dst->channel, src->stats.received_channel);
1476
1477         dst->capability = src->capability;
1478         memcpy(dst->rates, src->rates, src->rates_len);
1479         dst->rates_len = src->rates_len;
1480         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
1481         dst->rates_ex_len = src->rates_ex_len;
1482
1483         dst->mode = src->mode;
1484         dst->flags = src->flags;
1485         dst->time_stamp[0] = src->time_stamp[0];
1486         dst->time_stamp[1] = src->time_stamp[1];
1487
1488         dst->beacon_interval = src->beacon_interval;
1489         dst->listen_interval = src->listen_interval;
1490         dst->atim_window = src->atim_window;
1491         dst->erp_value = src->erp_value;
1492         dst->tim = src->tim;
1493
1494         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
1495         dst->wpa_ie_len = src->wpa_ie_len;
1496         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
1497         dst->rsn_ie_len = src->rsn_ie_len;
1498
1499         dst->last_scanned = jiffies;
1500         qos_active = src->qos_data.active;
1501         old_param = dst->qos_data.old_param_count;
1502         if (dst->flags & NETWORK_HAS_QOS_MASK)
1503                 memcpy(&dst->qos_data, &src->qos_data,
1504                        sizeof(struct libipw_qos_data));
1505         else {
1506                 dst->qos_data.supported = src->qos_data.supported;
1507                 dst->qos_data.param_count = src->qos_data.param_count;
1508         }
1509
1510         if (dst->qos_data.supported == 1) {
1511                 if (dst->ssid_len)
1512                         LIBIPW_DEBUG_QOS
1513                             ("QoS the network %s is QoS supported\n",
1514                              dst->ssid);
1515                 else
1516                         LIBIPW_DEBUG_QOS
1517                             ("QoS the network is QoS supported\n");
1518         }
1519         dst->qos_data.active = qos_active;
1520         dst->qos_data.old_param_count = old_param;
1521
1522         /* dst->last_associate is not overwritten */
1523 }
1524
1525 static inline int is_beacon(__le16 fc)
1526 {
1527         return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
1528 }
1529
1530 static void libipw_process_probe_response(struct libipw_device
1531                                                     *ieee, struct
1532                                                     libipw_probe_response
1533                                                     *beacon, struct libipw_rx_stats
1534                                                     *stats)
1535 {
1536         struct net_device *dev = ieee->dev;
1537         struct libipw_network network = { };
1538         struct libipw_network *target;
1539         struct libipw_network *oldest = NULL;
1540 #ifdef CONFIG_LIBIPW_DEBUG
1541         struct libipw_info_element *info_element = beacon->info_element;
1542 #endif
1543         unsigned long flags;
1544
1545         LIBIPW_DEBUG_SCAN("'%*pE' (%pM): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1546                      info_element->len, info_element->data,
1547                      beacon->header.addr3,
1548                      (beacon->capability & cpu_to_le16(1 << 0xf)) ? '1' : '0',
1549                      (beacon->capability & cpu_to_le16(1 << 0xe)) ? '1' : '0',
1550                      (beacon->capability & cpu_to_le16(1 << 0xd)) ? '1' : '0',
1551                      (beacon->capability & cpu_to_le16(1 << 0xc)) ? '1' : '0',
1552                      (beacon->capability & cpu_to_le16(1 << 0xb)) ? '1' : '0',
1553                      (beacon->capability & cpu_to_le16(1 << 0xa)) ? '1' : '0',
1554                      (beacon->capability & cpu_to_le16(1 << 0x9)) ? '1' : '0',
1555                      (beacon->capability & cpu_to_le16(1 << 0x8)) ? '1' : '0',
1556                      (beacon->capability & cpu_to_le16(1 << 0x7)) ? '1' : '0',
1557                      (beacon->capability & cpu_to_le16(1 << 0x6)) ? '1' : '0',
1558                      (beacon->capability & cpu_to_le16(1 << 0x5)) ? '1' : '0',
1559                      (beacon->capability & cpu_to_le16(1 << 0x4)) ? '1' : '0',
1560                      (beacon->capability & cpu_to_le16(1 << 0x3)) ? '1' : '0',
1561                      (beacon->capability & cpu_to_le16(1 << 0x2)) ? '1' : '0',
1562                      (beacon->capability & cpu_to_le16(1 << 0x1)) ? '1' : '0',
1563                      (beacon->capability & cpu_to_le16(1 << 0x0)) ? '1' : '0');
1564
1565         if (libipw_network_init(ieee, beacon, &network, stats)) {
1566                 LIBIPW_DEBUG_SCAN("Dropped '%*pE' (%pM) via %s.\n",
1567                                   info_element->len, info_element->data,
1568                                   beacon->header.addr3,
1569                                   is_beacon(beacon->header.frame_ctl) ?
1570                                   "BEACON" : "PROBE RESPONSE");
1571                 return;
1572         }
1573
1574         /* The network parsed correctly -- so now we scan our known networks
1575          * to see if we can find it in our list.
1576          *
1577          * NOTE:  This search is definitely not optimized.  Once its doing
1578          *        the "right thing" we'll optimize it for efficiency if
1579          *        necessary */
1580
1581         /* Search for this entry in the list and update it if it is
1582          * already there. */
1583
1584         spin_lock_irqsave(&ieee->lock, flags);
1585
1586         list_for_each_entry(target, &ieee->network_list, list) {
1587                 if (is_same_network(target, &network))
1588                         break;
1589
1590                 if ((oldest == NULL) ||
1591                     time_before(target->last_scanned, oldest->last_scanned))
1592                         oldest = target;
1593         }
1594
1595         /* If we didn't find a match, then get a new network slot to initialize
1596          * with this beacon's information */
1597         if (&target->list == &ieee->network_list) {
1598                 if (list_empty(&ieee->network_free_list)) {
1599                         /* If there are no more slots, expire the oldest */
1600                         list_del(&oldest->list);
1601                         target = oldest;
1602                         LIBIPW_DEBUG_SCAN("Expired '%*pE' (%pM) from network list.\n",
1603                                           target->ssid_len, target->ssid,
1604                                           target->bssid);
1605                 } else {
1606                         /* Otherwise just pull from the free list */
1607                         target = list_entry(ieee->network_free_list.next,
1608                                             struct libipw_network, list);
1609                         list_del(ieee->network_free_list.next);
1610                 }
1611
1612 #ifdef CONFIG_LIBIPW_DEBUG
1613                 LIBIPW_DEBUG_SCAN("Adding '%*pE' (%pM) via %s.\n",
1614                                   network.ssid_len, network.ssid,
1615                                   network.bssid,
1616                                   is_beacon(beacon->header.frame_ctl) ?
1617                                   "BEACON" : "PROBE RESPONSE");
1618 #endif
1619                 memcpy(target, &network, sizeof(*target));
1620                 list_add_tail(&target->list, &ieee->network_list);
1621         } else {
1622                 LIBIPW_DEBUG_SCAN("Updating '%*pE' (%pM) via %s.\n",
1623                                   target->ssid_len, target->ssid,
1624                                   target->bssid,
1625                                   is_beacon(beacon->header.frame_ctl) ?
1626                                   "BEACON" : "PROBE RESPONSE");
1627                 update_network(target, &network);
1628         }
1629
1630         spin_unlock_irqrestore(&ieee->lock, flags);
1631
1632         if (is_beacon(beacon->header.frame_ctl)) {
1633                 if (ieee->handle_beacon != NULL)
1634                         ieee->handle_beacon(dev, beacon, target);
1635         } else {
1636                 if (ieee->handle_probe_response != NULL)
1637                         ieee->handle_probe_response(dev, beacon, target);
1638         }
1639 }
1640
1641 void libipw_rx_mgt(struct libipw_device *ieee,
1642                       struct libipw_hdr_4addr *header,
1643                       struct libipw_rx_stats *stats)
1644 {
1645         switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
1646         case IEEE80211_STYPE_ASSOC_RESP:
1647                 LIBIPW_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
1648                                      WLAN_FC_GET_STYPE(le16_to_cpu
1649                                                        (header->frame_ctl)));
1650                 libipw_handle_assoc_resp(ieee,
1651                                             (struct libipw_assoc_response *)
1652                                             header, stats);
1653                 break;
1654
1655         case IEEE80211_STYPE_REASSOC_RESP:
1656                 LIBIPW_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
1657                                      WLAN_FC_GET_STYPE(le16_to_cpu
1658                                                        (header->frame_ctl)));
1659                 break;
1660
1661         case IEEE80211_STYPE_PROBE_REQ:
1662                 LIBIPW_DEBUG_MGMT("received auth (%d)\n",
1663                                      WLAN_FC_GET_STYPE(le16_to_cpu
1664                                                        (header->frame_ctl)));
1665
1666                 if (ieee->handle_probe_request != NULL)
1667                         ieee->handle_probe_request(ieee->dev,
1668                                                    (struct
1669                                                     libipw_probe_request *)
1670                                                    header, stats);
1671                 break;
1672
1673         case IEEE80211_STYPE_PROBE_RESP:
1674                 LIBIPW_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1675                                      WLAN_FC_GET_STYPE(le16_to_cpu
1676                                                        (header->frame_ctl)));
1677                 LIBIPW_DEBUG_SCAN("Probe response\n");
1678                 libipw_process_probe_response(ieee,
1679                                                  (struct
1680                                                   libipw_probe_response *)
1681                                                  header, stats);
1682                 break;
1683
1684         case IEEE80211_STYPE_BEACON:
1685                 LIBIPW_DEBUG_MGMT("received BEACON (%d)\n",
1686                                      WLAN_FC_GET_STYPE(le16_to_cpu
1687                                                        (header->frame_ctl)));
1688                 LIBIPW_DEBUG_SCAN("Beacon\n");
1689                 libipw_process_probe_response(ieee,
1690                                                  (struct
1691                                                   libipw_probe_response *)
1692                                                  header, stats);
1693                 break;
1694         case IEEE80211_STYPE_AUTH:
1695
1696                 LIBIPW_DEBUG_MGMT("received auth (%d)\n",
1697                                      WLAN_FC_GET_STYPE(le16_to_cpu
1698                                                        (header->frame_ctl)));
1699
1700                 if (ieee->handle_auth != NULL)
1701                         ieee->handle_auth(ieee->dev,
1702                                           (struct libipw_auth *)header);
1703                 break;
1704
1705         case IEEE80211_STYPE_DISASSOC:
1706                 if (ieee->handle_disassoc != NULL)
1707                         ieee->handle_disassoc(ieee->dev,
1708                                               (struct libipw_disassoc *)
1709                                               header);
1710                 break;
1711
1712         case IEEE80211_STYPE_ACTION:
1713                 LIBIPW_DEBUG_MGMT("ACTION\n");
1714                 if (ieee->handle_action)
1715                         ieee->handle_action(ieee->dev,
1716                                             (struct libipw_action *)
1717                                             header, stats);
1718                 break;
1719
1720         case IEEE80211_STYPE_REASSOC_REQ:
1721                 LIBIPW_DEBUG_MGMT("received reassoc (%d)\n",
1722                                      WLAN_FC_GET_STYPE(le16_to_cpu
1723                                                        (header->frame_ctl)));
1724
1725                 LIBIPW_DEBUG_MGMT("%s: LIBIPW_REASSOC_REQ received\n",
1726                                      ieee->dev->name);
1727                 if (ieee->handle_reassoc_request != NULL)
1728                         ieee->handle_reassoc_request(ieee->dev,
1729                                                     (struct libipw_reassoc_request *)
1730                                                      header);
1731                 break;
1732
1733         case IEEE80211_STYPE_ASSOC_REQ:
1734                 LIBIPW_DEBUG_MGMT("received assoc (%d)\n",
1735                                      WLAN_FC_GET_STYPE(le16_to_cpu
1736                                                        (header->frame_ctl)));
1737
1738                 LIBIPW_DEBUG_MGMT("%s: LIBIPW_ASSOC_REQ received\n",
1739                                      ieee->dev->name);
1740                 if (ieee->handle_assoc_request != NULL)
1741                         ieee->handle_assoc_request(ieee->dev);
1742                 break;
1743
1744         case IEEE80211_STYPE_DEAUTH:
1745                 LIBIPW_DEBUG_MGMT("DEAUTH\n");
1746                 if (ieee->handle_deauth != NULL)
1747                         ieee->handle_deauth(ieee->dev,
1748                                             (struct libipw_deauth *)
1749                                             header);
1750                 break;
1751         default:
1752                 LIBIPW_DEBUG_MGMT("received UNKNOWN (%d)\n",
1753                                      WLAN_FC_GET_STYPE(le16_to_cpu
1754                                                        (header->frame_ctl)));
1755                 LIBIPW_DEBUG_MGMT("%s: Unknown management packet: %d\n",
1756                                      ieee->dev->name,
1757                                      WLAN_FC_GET_STYPE(le16_to_cpu
1758                                                        (header->frame_ctl)));
1759                 break;
1760         }
1761 }
1762
1763 EXPORT_SYMBOL_GPL(libipw_rx_any);
1764 EXPORT_SYMBOL(libipw_rx_mgt);
1765 EXPORT_SYMBOL(libipw_rx);