linux/net/ieee80211/ieee80211_rx.c
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   1/*
   2 * Original code based Host AP (software wireless LAN access point) driver
   3 * for Intersil Prism2/2.5/3 - hostap.o module, common routines
   4 *
   5 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   6 * <j@w1.fi>
   7 * Copyright (c) 2002-2003, Jouni Malinen <j@w1.fi>
   8 * Copyright (c) 2004-2005, Intel Corporation
   9 *
  10 * This program is free software; you can redistribute it and/or modify
  11 * it under the terms of the GNU General Public License version 2 as
  12 * published by the Free Software Foundation. See README and COPYING for
  13 * more details.
  14 */
  15
  16#include <linux/compiler.h>
  17#include <linux/errno.h>
  18#include <linux/if_arp.h>
  19#include <linux/in6.h>
  20#include <linux/in.h>
  21#include <linux/ip.h>
  22#include <linux/kernel.h>
  23#include <linux/module.h>
  24#include <linux/netdevice.h>
  25#include <linux/proc_fs.h>
  26#include <linux/skbuff.h>
  27#include <linux/slab.h>
  28#include <linux/tcp.h>
  29#include <linux/types.h>
  30#include <linux/wireless.h>
  31#include <linux/etherdevice.h>
  32#include <asm/uaccess.h>
  33#include <linux/ctype.h>
  34
  35#include <net/ieee80211.h>
  36
  37static void ieee80211_monitor_rx(struct ieee80211_device *ieee,
  38                                        struct sk_buff *skb,
  39                                        struct ieee80211_rx_stats *rx_stats)
  40{
  41        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
  42        u16 fc = le16_to_cpu(hdr->frame_ctl);
  43
  44        skb->dev = ieee->dev;
  45        skb_reset_mac_header(skb);
  46        skb_pull(skb, ieee80211_get_hdrlen(fc));
  47        skb->pkt_type = PACKET_OTHERHOST;
  48        skb->protocol = htons(ETH_P_80211_RAW);
  49        memset(skb->cb, 0, sizeof(skb->cb));
  50        netif_rx(skb);
  51}
  52
  53/* Called only as a tasklet (software IRQ) */
  54static struct ieee80211_frag_entry *ieee80211_frag_cache_find(struct
  55                                                              ieee80211_device
  56                                                              *ieee,
  57                                                              unsigned int seq,
  58                                                              unsigned int frag,
  59                                                              u8 * src,
  60                                                              u8 * dst)
  61{
  62        struct ieee80211_frag_entry *entry;
  63        int i;
  64
  65        for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) {
  66                entry = &ieee->frag_cache[i];
  67                if (entry->skb != NULL &&
  68                    time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
  69                        IEEE80211_DEBUG_FRAG("expiring fragment cache entry "
  70                                             "seq=%u last_frag=%u\n",
  71                                             entry->seq, entry->last_frag);
  72                        dev_kfree_skb_any(entry->skb);
  73                        entry->skb = NULL;
  74                }
  75
  76                if (entry->skb != NULL && entry->seq == seq &&
  77                    (entry->last_frag + 1 == frag || frag == -1) &&
  78                    !compare_ether_addr(entry->src_addr, src) &&
  79                    !compare_ether_addr(entry->dst_addr, dst))
  80                        return entry;
  81        }
  82
  83        return NULL;
  84}
  85
  86/* Called only as a tasklet (software IRQ) */
  87static struct sk_buff *ieee80211_frag_cache_get(struct ieee80211_device *ieee,
  88                                                struct ieee80211_hdr_4addr *hdr)
  89{
  90        struct sk_buff *skb = NULL;
  91        u16 sc;
  92        unsigned int frag, seq;
  93        struct ieee80211_frag_entry *entry;
  94
  95        sc = le16_to_cpu(hdr->seq_ctl);
  96        frag = WLAN_GET_SEQ_FRAG(sc);
  97        seq = WLAN_GET_SEQ_SEQ(sc);
  98
  99        if (frag == 0) {
 100                /* Reserve enough space to fit maximum frame length */
 101                skb = dev_alloc_skb(ieee->dev->mtu +
 102                                    sizeof(struct ieee80211_hdr_4addr) +
 103                                    8 /* LLC */  +
 104                                    2 /* alignment */  +
 105                                    8 /* WEP */  + ETH_ALEN /* WDS */ );
 106                if (skb == NULL)
 107                        return NULL;
 108
 109                entry = &ieee->frag_cache[ieee->frag_next_idx];
 110                ieee->frag_next_idx++;
 111                if (ieee->frag_next_idx >= IEEE80211_FRAG_CACHE_LEN)
 112                        ieee->frag_next_idx = 0;
 113
 114                if (entry->skb != NULL)
 115                        dev_kfree_skb_any(entry->skb);
 116
 117                entry->first_frag_time = jiffies;
 118                entry->seq = seq;
 119                entry->last_frag = frag;
 120                entry->skb = skb;
 121                memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
 122                memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
 123        } else {
 124                /* received a fragment of a frame for which the head fragment
 125                 * should have already been received */
 126                entry = ieee80211_frag_cache_find(ieee, seq, frag, hdr->addr2,
 127                                                  hdr->addr1);
 128                if (entry != NULL) {
 129                        entry->last_frag = frag;
 130                        skb = entry->skb;
 131                }
 132        }
 133
 134        return skb;
 135}
 136
 137/* Called only as a tasklet (software IRQ) */
 138static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee,
 139                                           struct ieee80211_hdr_4addr *hdr)
 140{
 141        u16 sc;
 142        unsigned int seq;
 143        struct ieee80211_frag_entry *entry;
 144
 145        sc = le16_to_cpu(hdr->seq_ctl);
 146        seq = WLAN_GET_SEQ_SEQ(sc);
 147
 148        entry = ieee80211_frag_cache_find(ieee, seq, -1, hdr->addr2,
 149                                          hdr->addr1);
 150
 151        if (entry == NULL) {
 152                IEEE80211_DEBUG_FRAG("could not invalidate fragment cache "
 153                                     "entry (seq=%u)\n", seq);
 154                return -1;
 155        }
 156
 157        entry->skb = NULL;
 158        return 0;
 159}
 160
 161#ifdef NOT_YET
 162/* ieee80211_rx_frame_mgtmt
 163 *
 164 * Responsible for handling management control frames
 165 *
 166 * Called by ieee80211_rx */
 167static int
 168ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb,
 169                        struct ieee80211_rx_stats *rx_stats, u16 type,
 170                        u16 stype)
 171{
 172        if (ieee->iw_mode == IW_MODE_MASTER) {
 173                printk(KERN_DEBUG "%s: Master mode not yet suppported.\n",
 174                       ieee->dev->name);
 175                return 0;
 176/*
 177  hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr_4addr *)
 178  skb->data);*/
 179        }
 180
 181        if (ieee->hostapd && type == WLAN_FC_TYPE_MGMT) {
 182                if (stype == WLAN_FC_STYPE_BEACON &&
 183                    ieee->iw_mode == IW_MODE_MASTER) {
 184                        struct sk_buff *skb2;
 185                        /* Process beacon frames also in kernel driver to
 186                         * update STA(AP) table statistics */
 187                        skb2 = skb_clone(skb, GFP_ATOMIC);
 188                        if (skb2)
 189                                hostap_rx(skb2->dev, skb2, rx_stats);
 190                }
 191
 192                /* send management frames to the user space daemon for
 193                 * processing */
 194                ieee->apdevstats.rx_packets++;
 195                ieee->apdevstats.rx_bytes += skb->len;
 196                prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
 197                return 0;
 198        }
 199
 200        if (ieee->iw_mode == IW_MODE_MASTER) {
 201                if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
 202                        printk(KERN_DEBUG "%s: unknown management frame "
 203                               "(type=0x%02x, stype=0x%02x) dropped\n",
 204                               skb->dev->name, type, stype);
 205                        return -1;
 206                }
 207
 208                hostap_rx(skb->dev, skb, rx_stats);
 209                return 0;
 210        }
 211
 212        printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame "
 213               "received in non-Host AP mode\n", skb->dev->name);
 214        return -1;
 215}
 216#endif
 217
 218/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
 219/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
 220static unsigned char rfc1042_header[] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
 221
 222/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
 223static unsigned char bridge_tunnel_header[] =
 224    { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
 225/* No encapsulation header if EtherType < 0x600 (=length) */
 226
 227/* Called by ieee80211_rx_frame_decrypt */
 228static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee,
 229                                    struct sk_buff *skb)
 230{
 231        struct net_device *dev = ieee->dev;
 232        u16 fc, ethertype;
 233        struct ieee80211_hdr_3addr *hdr;
 234        u8 *pos;
 235
 236        if (skb->len < 24)
 237                return 0;
 238
 239        hdr = (struct ieee80211_hdr_3addr *)skb->data;
 240        fc = le16_to_cpu(hdr->frame_ctl);
 241
 242        /* check that the frame is unicast frame to us */
 243        if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 244            IEEE80211_FCTL_TODS &&
 245            !compare_ether_addr(hdr->addr1, dev->dev_addr) &&
 246            !compare_ether_addr(hdr->addr3, dev->dev_addr)) {
 247                /* ToDS frame with own addr BSSID and DA */
 248        } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 249                   IEEE80211_FCTL_FROMDS &&
 250                   !compare_ether_addr(hdr->addr1, dev->dev_addr)) {
 251                /* FromDS frame with own addr as DA */
 252        } else
 253                return 0;
 254
 255        if (skb->len < 24 + 8)
 256                return 0;
 257
 258        /* check for port access entity Ethernet type */
 259        pos = skb->data + 24;
 260        ethertype = (pos[6] << 8) | pos[7];
 261        if (ethertype == ETH_P_PAE)
 262                return 1;
 263
 264        return 0;
 265}
 266
 267/* Called only as a tasklet (software IRQ), by ieee80211_rx */
 268static int
 269ieee80211_rx_frame_decrypt(struct ieee80211_device *ieee, struct sk_buff *skb,
 270                           struct ieee80211_crypt_data *crypt)
 271{
 272        struct ieee80211_hdr_3addr *hdr;
 273        int res, hdrlen;
 274
 275        if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
 276                return 0;
 277
 278        hdr = (struct ieee80211_hdr_3addr *)skb->data;
 279        hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 280
 281        atomic_inc(&crypt->refcnt);
 282        res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
 283        atomic_dec(&crypt->refcnt);
 284        if (res < 0) {
 285                IEEE80211_DEBUG_DROP("decryption failed (SA=" MAC_FMT
 286                                     ") res=%d\n",
 287                                     hdr->addr2[0], hdr->addr2[1],
 288                                     hdr->addr2[2], hdr->addr2[3],
 289                                     hdr->addr2[4], hdr->addr2[5],
 290                                     res);
 291                if (res == -2)
 292                        IEEE80211_DEBUG_DROP("Decryption failed ICV "
 293                                             "mismatch (key %d)\n",
 294                                             skb->data[hdrlen + 3] >> 6);
 295                ieee->ieee_stats.rx_discards_undecryptable++;
 296                return -1;
 297        }
 298
 299        return res;
 300}
 301
 302/* Called only as a tasklet (software IRQ), by ieee80211_rx */
 303static int
 304ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device *ieee,
 305                                struct sk_buff *skb, int keyidx,
 306                                struct ieee80211_crypt_data *crypt)
 307{
 308        struct ieee80211_hdr_3addr *hdr;
 309        int res, hdrlen;
 310
 311        if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
 312                return 0;
 313
 314        hdr = (struct ieee80211_hdr_3addr *)skb->data;
 315        hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 316
 317        atomic_inc(&crypt->refcnt);
 318        res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
 319        atomic_dec(&crypt->refcnt);
 320        if (res < 0) {
 321                printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
 322                       " (SA=" MAC_FMT " keyidx=%d)\n",
 323                       ieee->dev->name,
 324                       hdr->addr2[0], hdr->addr2[1],
 325                       hdr->addr2[2], hdr->addr2[3],
 326                       hdr->addr2[4], hdr->addr2[5],
 327                       keyidx);
 328                return -1;
 329        }
 330
 331        return 0;
 332}
 333
 334/* All received frames are sent to this function. @skb contains the frame in
 335 * IEEE 802.11 format, i.e., in the format it was sent over air.
 336 * This function is called only as a tasklet (software IRQ). */
 337int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
 338                 struct ieee80211_rx_stats *rx_stats)
 339{
 340        struct net_device *dev = ieee->dev;
 341        struct ieee80211_hdr_4addr *hdr;
 342        size_t hdrlen;
 343        u16 fc, type, stype, sc;
 344        struct net_device_stats *stats;
 345        unsigned int frag;
 346        u8 *payload;
 347        u16 ethertype;
 348#ifdef NOT_YET
 349        struct net_device *wds = NULL;
 350        struct sk_buff *skb2 = NULL;
 351        struct net_device *wds = NULL;
 352        int frame_authorized = 0;
 353        int from_assoc_ap = 0;
 354        void *sta = NULL;
 355#endif
 356        u8 dst[ETH_ALEN];
 357        u8 src[ETH_ALEN];
 358        struct ieee80211_crypt_data *crypt = NULL;
 359        int keyidx = 0;
 360        int can_be_decrypted = 0;
 361        DECLARE_MAC_BUF(mac);
 362
 363        hdr = (struct ieee80211_hdr_4addr *)skb->data;
 364        stats = &ieee->stats;
 365
 366        if (skb->len < 10) {
 367                printk(KERN_INFO "%s: SKB length < 10\n", dev->name);
 368                goto rx_dropped;
 369        }
 370
 371        fc = le16_to_cpu(hdr->frame_ctl);
 372        type = WLAN_FC_GET_TYPE(fc);
 373        stype = WLAN_FC_GET_STYPE(fc);
 374        sc = le16_to_cpu(hdr->seq_ctl);
 375        frag = WLAN_GET_SEQ_FRAG(sc);
 376        hdrlen = ieee80211_get_hdrlen(fc);
 377
 378        if (skb->len < hdrlen) {
 379                printk(KERN_INFO "%s: invalid SKB length %d\n",
 380                        dev->name, skb->len);
 381                goto rx_dropped;
 382        }
 383
 384        /* Put this code here so that we avoid duplicating it in all
 385         * Rx paths. - Jean II */
 386#ifdef CONFIG_WIRELESS_EXT
 387#ifdef IW_WIRELESS_SPY          /* defined in iw_handler.h */
 388        /* If spy monitoring on */
 389        if (ieee->spy_data.spy_number > 0) {
 390                struct iw_quality wstats;
 391
 392                wstats.updated = 0;
 393                if (rx_stats->mask & IEEE80211_STATMASK_RSSI) {
 394                        wstats.level = rx_stats->signal;
 395                        wstats.updated |= IW_QUAL_LEVEL_UPDATED;
 396                } else
 397                        wstats.updated |= IW_QUAL_LEVEL_INVALID;
 398
 399                if (rx_stats->mask & IEEE80211_STATMASK_NOISE) {
 400                        wstats.noise = rx_stats->noise;
 401                        wstats.updated |= IW_QUAL_NOISE_UPDATED;
 402                } else
 403                        wstats.updated |= IW_QUAL_NOISE_INVALID;
 404
 405                if (rx_stats->mask & IEEE80211_STATMASK_SIGNAL) {
 406                        wstats.qual = rx_stats->signal;
 407                        wstats.updated |= IW_QUAL_QUAL_UPDATED;
 408                } else
 409                        wstats.updated |= IW_QUAL_QUAL_INVALID;
 410
 411                /* Update spy records */
 412                wireless_spy_update(ieee->dev, hdr->addr2, &wstats);
 413        }
 414#endif                          /* IW_WIRELESS_SPY */
 415#endif                          /* CONFIG_WIRELESS_EXT */
 416
 417#ifdef NOT_YET
 418        hostap_update_rx_stats(local->ap, hdr, rx_stats);
 419#endif
 420
 421        if (ieee->iw_mode == IW_MODE_MONITOR) {
 422                stats->rx_packets++;
 423                stats->rx_bytes += skb->len;
 424                ieee80211_monitor_rx(ieee, skb, rx_stats);
 425                return 1;
 426        }
 427
 428        can_be_decrypted = (is_multicast_ether_addr(hdr->addr1) ||
 429                            is_broadcast_ether_addr(hdr->addr2)) ?
 430            ieee->host_mc_decrypt : ieee->host_decrypt;
 431
 432        if (can_be_decrypted) {
 433                if (skb->len >= hdrlen + 3) {
 434                        /* Top two-bits of byte 3 are the key index */
 435                        keyidx = skb->data[hdrlen + 3] >> 6;
 436                }
 437
 438                /* ieee->crypt[] is WEP_KEY (4) in length.  Given that keyidx
 439                 * is only allowed 2-bits of storage, no value of keyidx can
 440                 * be provided via above code that would result in keyidx
 441                 * being out of range */
 442                crypt = ieee->crypt[keyidx];
 443
 444#ifdef NOT_YET
 445                sta = NULL;
 446
 447                /* Use station specific key to override default keys if the
 448                 * receiver address is a unicast address ("individual RA"). If
 449                 * bcrx_sta_key parameter is set, station specific key is used
 450                 * even with broad/multicast targets (this is against IEEE
 451                 * 802.11, but makes it easier to use different keys with
 452                 * stations that do not support WEP key mapping). */
 453
 454                if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
 455                        (void)hostap_handle_sta_crypto(local, hdr, &crypt,
 456                                                       &sta);
 457#endif
 458
 459                /* allow NULL decrypt to indicate an station specific override
 460                 * for default encryption */
 461                if (crypt && (crypt->ops == NULL ||
 462                              crypt->ops->decrypt_mpdu == NULL))
 463                        crypt = NULL;
 464
 465                if (!crypt && (fc & IEEE80211_FCTL_PROTECTED)) {
 466                        /* This seems to be triggered by some (multicast?)
 467                         * frames from other than current BSS, so just drop the
 468                         * frames silently instead of filling system log with
 469                         * these reports. */
 470                        IEEE80211_DEBUG_DROP("Decryption failed (not set)"
 471                                             " (SA=" MAC_FMT ")\n",
 472                                             hdr->addr2[0], hdr->addr2[1],
 473                                             hdr->addr2[2], hdr->addr2[3],
 474                                             hdr->addr2[4], hdr->addr2[5]);
 475                        ieee->ieee_stats.rx_discards_undecryptable++;
 476                        goto rx_dropped;
 477                }
 478        }
 479#ifdef NOT_YET
 480        if (type != WLAN_FC_TYPE_DATA) {
 481                if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_AUTH &&
 482                    fc & IEEE80211_FCTL_PROTECTED && ieee->host_decrypt &&
 483                    (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0) {
 484                        printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
 485                               "from " MAC_FMT "\n", dev->name,
 486                               hdr->addr2[0], hdr->addr2[1],
 487                               hdr->addr2[2], hdr->addr2[3],
 488                               hdr->addr2[4], hdr->addr2[5]);
 489                        /* TODO: could inform hostapd about this so that it
 490                         * could send auth failure report */
 491                        goto rx_dropped;
 492                }
 493
 494                if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
 495                        goto rx_dropped;
 496                else
 497                        goto rx_exit;
 498        }
 499#endif
 500        /* drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.29) */
 501        if (sc == ieee->prev_seq_ctl)
 502                goto rx_dropped;
 503        else
 504                ieee->prev_seq_ctl = sc;
 505
 506        /* Data frame - extract src/dst addresses */
 507        if (skb->len < IEEE80211_3ADDR_LEN)
 508                goto rx_dropped;
 509
 510        switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
 511        case IEEE80211_FCTL_FROMDS:
 512                memcpy(dst, hdr->addr1, ETH_ALEN);
 513                memcpy(src, hdr->addr3, ETH_ALEN);
 514                break;
 515        case IEEE80211_FCTL_TODS:
 516                memcpy(dst, hdr->addr3, ETH_ALEN);
 517                memcpy(src, hdr->addr2, ETH_ALEN);
 518                break;
 519        case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
 520                if (skb->len < IEEE80211_4ADDR_LEN)
 521                        goto rx_dropped;
 522                memcpy(dst, hdr->addr3, ETH_ALEN);
 523                memcpy(src, hdr->addr4, ETH_ALEN);
 524                break;
 525        case 0:
 526                memcpy(dst, hdr->addr1, ETH_ALEN);
 527                memcpy(src, hdr->addr2, ETH_ALEN);
 528                break;
 529        }
 530
 531#ifdef NOT_YET
 532        if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
 533                goto rx_dropped;
 534        if (wds) {
 535                skb->dev = dev = wds;
 536                stats = hostap_get_stats(dev);
 537        }
 538
 539        if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
 540            (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 541            IEEE80211_FCTL_FROMDS && ieee->stadev
 542            && !compare_ether_addr(hdr->addr2, ieee->assoc_ap_addr)) {
 543                /* Frame from BSSID of the AP for which we are a client */
 544                skb->dev = dev = ieee->stadev;
 545                stats = hostap_get_stats(dev);
 546                from_assoc_ap = 1;
 547        }
 548#endif
 549
 550        dev->last_rx = jiffies;
 551
 552#ifdef NOT_YET
 553        if ((ieee->iw_mode == IW_MODE_MASTER ||
 554             ieee->iw_mode == IW_MODE_REPEAT) && !from_assoc_ap) {
 555                switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
 556                                             wds != NULL)) {
 557                case AP_RX_CONTINUE_NOT_AUTHORIZED:
 558                        frame_authorized = 0;
 559                        break;
 560                case AP_RX_CONTINUE:
 561                        frame_authorized = 1;
 562                        break;
 563                case AP_RX_DROP:
 564                        goto rx_dropped;
 565                case AP_RX_EXIT:
 566                        goto rx_exit;
 567                }
 568        }
 569#endif
 570
 571        /* Nullfunc frames may have PS-bit set, so they must be passed to
 572         * hostap_handle_sta_rx() before being dropped here. */
 573
 574        stype &= ~IEEE80211_STYPE_QOS_DATA;
 575
 576        if (stype != IEEE80211_STYPE_DATA &&
 577            stype != IEEE80211_STYPE_DATA_CFACK &&
 578            stype != IEEE80211_STYPE_DATA_CFPOLL &&
 579            stype != IEEE80211_STYPE_DATA_CFACKPOLL) {
 580                if (stype != IEEE80211_STYPE_NULLFUNC)
 581                        IEEE80211_DEBUG_DROP("RX: dropped data frame "
 582                                             "with no data (type=0x%02x, "
 583                                             "subtype=0x%02x, len=%d)\n",
 584                                             type, stype, skb->len);
 585                goto rx_dropped;
 586        }
 587
 588        /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
 589
 590        if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 591            (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
 592                goto rx_dropped;
 593
 594        hdr = (struct ieee80211_hdr_4addr *)skb->data;
 595
 596        /* skb: hdr + (possibly fragmented) plaintext payload */
 597        // PR: FIXME: hostap has additional conditions in the "if" below:
 598        // ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
 599        if ((frag != 0) || (fc & IEEE80211_FCTL_MOREFRAGS)) {
 600                int flen;
 601                struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
 602                IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
 603
 604                if (!frag_skb) {
 605                        IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
 606                                        "Rx cannot get skb from fragment "
 607                                        "cache (morefrag=%d seq=%u frag=%u)\n",
 608                                        (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
 609                                        WLAN_GET_SEQ_SEQ(sc), frag);
 610                        goto rx_dropped;
 611                }
 612
 613                flen = skb->len;
 614                if (frag != 0)
 615                        flen -= hdrlen;
 616
 617                if (frag_skb->tail + flen > frag_skb->end) {
 618                        printk(KERN_WARNING "%s: host decrypted and "
 619                               "reassembled frame did not fit skb\n",
 620                               dev->name);
 621                        ieee80211_frag_cache_invalidate(ieee, hdr);
 622                        goto rx_dropped;
 623                }
 624
 625                if (frag == 0) {
 626                        /* copy first fragment (including full headers) into
 627                         * beginning of the fragment cache skb */
 628                        skb_copy_from_linear_data(skb, skb_put(frag_skb, flen), flen);
 629                } else {
 630                        /* append frame payload to the end of the fragment
 631                         * cache skb */
 632                        skb_copy_from_linear_data_offset(skb, hdrlen,
 633                                      skb_put(frag_skb, flen), flen);
 634                }
 635                dev_kfree_skb_any(skb);
 636                skb = NULL;
 637
 638                if (fc & IEEE80211_FCTL_MOREFRAGS) {
 639                        /* more fragments expected - leave the skb in fragment
 640                         * cache for now; it will be delivered to upper layers
 641                         * after all fragments have been received */
 642                        goto rx_exit;
 643                }
 644
 645                /* this was the last fragment and the frame will be
 646                 * delivered, so remove skb from fragment cache */
 647                skb = frag_skb;
 648                hdr = (struct ieee80211_hdr_4addr *)skb->data;
 649                ieee80211_frag_cache_invalidate(ieee, hdr);
 650        }
 651
 652        /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
 653         * encrypted/authenticated */
 654        if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 655            ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
 656                goto rx_dropped;
 657
 658        hdr = (struct ieee80211_hdr_4addr *)skb->data;
 659        if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) {
 660                if (            /*ieee->ieee802_1x && */
 661                           ieee80211_is_eapol_frame(ieee, skb)) {
 662                        /* pass unencrypted EAPOL frames even if encryption is
 663                         * configured */
 664                } else {
 665                        IEEE80211_DEBUG_DROP("encryption configured, but RX "
 666                                             "frame not encrypted (SA="
 667                                             MAC_FMT ")\n",
 668                                             hdr->addr2[0], hdr->addr2[1],
 669                                             hdr->addr2[2], hdr->addr2[3],
 670                                             hdr->addr2[4], hdr->addr2[5]);
 671                        goto rx_dropped;
 672                }
 673        }
 674
 675        if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep &&
 676            !ieee80211_is_eapol_frame(ieee, skb)) {
 677                IEEE80211_DEBUG_DROP("dropped unencrypted RX data "
 678                                     "frame from " MAC_FMT
 679                                     " (drop_unencrypted=1)\n",
 680                                     hdr->addr2[0], hdr->addr2[1],
 681                                     hdr->addr2[2], hdr->addr2[3],
 682                                     hdr->addr2[4], hdr->addr2[5]);
 683                goto rx_dropped;
 684        }
 685
 686        /* If the frame was decrypted in hardware, we may need to strip off
 687         * any security data (IV, ICV, etc) that was left behind */
 688        if (!can_be_decrypted && (fc & IEEE80211_FCTL_PROTECTED) &&
 689            ieee->host_strip_iv_icv) {
 690                int trimlen = 0;
 691
 692                /* Top two-bits of byte 3 are the key index */
 693                if (skb->len >= hdrlen + 3)
 694                        keyidx = skb->data[hdrlen + 3] >> 6;
 695
 696                /* To strip off any security data which appears before the
 697                 * payload, we simply increase hdrlen (as the header gets
 698                 * chopped off immediately below). For the security data which
 699                 * appears after the payload, we use skb_trim. */
 700
 701                switch (ieee->sec.encode_alg[keyidx]) {
 702                case SEC_ALG_WEP:
 703                        /* 4 byte IV */
 704                        hdrlen += 4;
 705                        /* 4 byte ICV */
 706                        trimlen = 4;
 707                        break;
 708                case SEC_ALG_TKIP:
 709                        /* 4 byte IV, 4 byte ExtIV */
 710                        hdrlen += 8;
 711                        /* 8 byte MIC, 4 byte ICV */
 712                        trimlen = 12;
 713                        break;
 714                case SEC_ALG_CCMP:
 715                        /* 8 byte CCMP header */
 716                        hdrlen += 8;
 717                        /* 8 byte MIC */
 718                        trimlen = 8;
 719                        break;
 720                }
 721
 722                if (skb->len < trimlen)
 723                        goto rx_dropped;
 724
 725                __skb_trim(skb, skb->len - trimlen);
 726
 727                if (skb->len < hdrlen)
 728                        goto rx_dropped;
 729        }
 730
 731        /* skb: hdr + (possible reassembled) full plaintext payload */
 732
 733        payload = skb->data + hdrlen;
 734        ethertype = (payload[6] << 8) | payload[7];
 735
 736#ifdef NOT_YET
 737        /* If IEEE 802.1X is used, check whether the port is authorized to send
 738         * the received frame. */
 739        if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) {
 740                if (ethertype == ETH_P_PAE) {
 741                        printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n",
 742                               dev->name);
 743                        if (ieee->hostapd && ieee->apdev) {
 744                                /* Send IEEE 802.1X frames to the user
 745                                 * space daemon for processing */
 746                                prism2_rx_80211(ieee->apdev, skb, rx_stats,
 747                                                PRISM2_RX_MGMT);
 748                                ieee->apdevstats.rx_packets++;
 749                                ieee->apdevstats.rx_bytes += skb->len;
 750                                goto rx_exit;
 751                        }
 752                } else if (!frame_authorized) {
 753                        printk(KERN_DEBUG "%s: dropped frame from "
 754                               "unauthorized port (IEEE 802.1X): "
 755                               "ethertype=0x%04x\n", dev->name, ethertype);
 756                        goto rx_dropped;
 757                }
 758        }
 759#endif
 760
 761        /* convert hdr + possible LLC headers into Ethernet header */
 762        if (skb->len - hdrlen >= 8 &&
 763            ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 &&
 764              ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
 765             memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) {
 766                /* remove RFC1042 or Bridge-Tunnel encapsulation and
 767                 * replace EtherType */
 768                skb_pull(skb, hdrlen + SNAP_SIZE);
 769                memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 770                memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 771        } else {
 772                __be16 len;
 773                /* Leave Ethernet header part of hdr and full payload */
 774                skb_pull(skb, hdrlen);
 775                len = htons(skb->len);
 776                memcpy(skb_push(skb, 2), &len, 2);
 777                memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 778                memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 779        }
 780
 781#ifdef NOT_YET
 782        if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 783                    IEEE80211_FCTL_TODS) && skb->len >= ETH_HLEN + ETH_ALEN) {
 784                /* Non-standard frame: get addr4 from its bogus location after
 785                 * the payload */
 786                skb_copy_to_linear_data_offset(skb, ETH_ALEN,
 787                                               skb->data + skb->len - ETH_ALEN,
 788                                               ETH_ALEN);
 789                skb_trim(skb, skb->len - ETH_ALEN);
 790        }
 791#endif
 792
 793        stats->rx_packets++;
 794        stats->rx_bytes += skb->len;
 795
 796#ifdef NOT_YET
 797        if (ieee->iw_mode == IW_MODE_MASTER && !wds && ieee->ap->bridge_packets) {
 798                if (dst[0] & 0x01) {
 799                        /* copy multicast frame both to the higher layers and
 800                         * to the wireless media */
 801                        ieee->ap->bridged_multicast++;
 802                        skb2 = skb_clone(skb, GFP_ATOMIC);
 803                        if (skb2 == NULL)
 804                                printk(KERN_DEBUG "%s: skb_clone failed for "
 805                                       "multicast frame\n", dev->name);
 806                } else if (hostap_is_sta_assoc(ieee->ap, dst)) {
 807                        /* send frame directly to the associated STA using
 808                         * wireless media and not passing to higher layers */
 809                        ieee->ap->bridged_unicast++;
 810                        skb2 = skb;
 811                        skb = NULL;
 812                }
 813        }
 814
 815        if (skb2 != NULL) {
 816                /* send to wireless media */
 817                skb2->dev = dev;
 818                skb2->protocol = htons(ETH_P_802_3);
 819                skb_reset_mac_header(skb2);
 820                skb_reset_network_header(skb2);
 821                /* skb2->network_header += ETH_HLEN; */
 822                dev_queue_xmit(skb2);
 823        }
 824#endif
 825
 826        if (skb) {
 827                skb->protocol = eth_type_trans(skb, dev);
 828                memset(skb->cb, 0, sizeof(skb->cb));
 829                skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
 830                if (netif_rx(skb) == NET_RX_DROP) {
 831                        /* netif_rx always succeeds, but it might drop
 832                         * the packet.  If it drops the packet, we log that
 833                         * in our stats. */
 834                        IEEE80211_DEBUG_DROP
 835                            ("RX: netif_rx dropped the packet\n");
 836                        stats->rx_dropped++;
 837                }
 838        }
 839
 840      rx_exit:
 841#ifdef NOT_YET
 842        if (sta)
 843                hostap_handle_sta_release(sta);
 844#endif
 845        return 1;
 846
 847      rx_dropped:
 848        stats->rx_dropped++;
 849
 850        /* Returning 0 indicates to caller that we have not handled the SKB--
 851         * so it is still allocated and can be used again by underlying
 852         * hardware as a DMA target */
 853        return 0;
 854}
 855
 856/* Filter out unrelated packets, call ieee80211_rx[_mgt]
 857 * This function takes over the skb, it should not be used again after calling
 858 * this function. */
 859void ieee80211_rx_any(struct ieee80211_device *ieee,
 860                     struct sk_buff *skb, struct ieee80211_rx_stats *stats)
 861{
 862        struct ieee80211_hdr_4addr *hdr;
 863        int is_packet_for_us;
 864        u16 fc;
 865
 866        if (ieee->iw_mode == IW_MODE_MONITOR) {
 867                if (!ieee80211_rx(ieee, skb, stats))
 868                        dev_kfree_skb_irq(skb);
 869                return;
 870        }
 871
 872        if (skb->len < sizeof(struct ieee80211_hdr))
 873                goto drop_free;
 874
 875        hdr = (struct ieee80211_hdr_4addr *)skb->data;
 876        fc = le16_to_cpu(hdr->frame_ctl);
 877
 878        if ((fc & IEEE80211_FCTL_VERS) != 0)
 879                goto drop_free;
 880
 881        switch (fc & IEEE80211_FCTL_FTYPE) {
 882        case IEEE80211_FTYPE_MGMT:
 883                if (skb->len < sizeof(struct ieee80211_hdr_3addr))
 884                        goto drop_free;
 885                ieee80211_rx_mgt(ieee, hdr, stats);
 886                dev_kfree_skb_irq(skb);
 887                return;
 888        case IEEE80211_FTYPE_DATA:
 889                break;
 890        case IEEE80211_FTYPE_CTL:
 891                return;
 892        default:
 893                return;
 894        }
 895
 896        is_packet_for_us = 0;
 897        switch (ieee->iw_mode) {
 898        case IW_MODE_ADHOC:
 899                /* our BSS and not from/to DS */
 900                if (memcmp(hdr->addr3, ieee->bssid, ETH_ALEN) == 0)
 901                if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == 0) {
 902                        /* promisc: get all */
 903                        if (ieee->dev->flags & IFF_PROMISC)
 904                                is_packet_for_us = 1;
 905                        /* to us */
 906                        else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
 907                                is_packet_for_us = 1;
 908                        /* mcast */
 909                        else if (is_multicast_ether_addr(hdr->addr1))
 910                                is_packet_for_us = 1;
 911                }
 912                break;
 913        case IW_MODE_INFRA:
 914                /* our BSS (== from our AP) and from DS */
 915                if (memcmp(hdr->addr2, ieee->bssid, ETH_ALEN) == 0)
 916                if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS) {
 917                        /* promisc: get all */
 918                        if (ieee->dev->flags & IFF_PROMISC)
 919                                is_packet_for_us = 1;
 920                        /* to us */
 921                        else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
 922                                is_packet_for_us = 1;
 923                        /* mcast */
 924                        else if (is_multicast_ether_addr(hdr->addr1)) {
 925                                /* not our own packet bcasted from AP */
 926                                if (memcmp(hdr->addr3, ieee->dev->dev_addr, ETH_ALEN))
 927                                        is_packet_for_us = 1;
 928                        }
 929                }
 930                break;
 931        default:
 932                /* ? */
 933                break;
 934        }
 935
 936        if (is_packet_for_us)
 937                if (!ieee80211_rx(ieee, skb, stats))
 938                        dev_kfree_skb_irq(skb);
 939        return;
 940
 941drop_free:
 942        dev_kfree_skb_irq(skb);
 943        ieee->stats.rx_dropped++;
 944        return;
 945}
 946
 947#define MGMT_FRAME_FIXED_PART_LENGTH            0x24
 948
 949static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
 950
 951/*
 952* Make ther structure we read from the beacon packet has
 953* the right values
 954*/
 955static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
 956                                     *info_element, int sub_type)
 957{
 958
 959        if (info_element->qui_subtype != sub_type)
 960                return -1;
 961        if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
 962                return -1;
 963        if (info_element->qui_type != QOS_OUI_TYPE)
 964                return -1;
 965        if (info_element->version != QOS_VERSION_1)
 966                return -1;
 967
 968        return 0;
 969}
 970
 971/*
 972 * Parse a QoS parameter element
 973 */
 974static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
 975                                            *element_param, struct ieee80211_info_element
 976                                            *info_element)
 977{
 978        int ret = 0;
 979        u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2;
 980
 981        if ((info_element == NULL) || (element_param == NULL))
 982                return -1;
 983
 984        if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
 985                memcpy(element_param->info_element.qui, info_element->data,
 986                       info_element->len);
 987                element_param->info_element.elementID = info_element->id;
 988                element_param->info_element.length = info_element->len;
 989        } else
 990                ret = -1;
 991        if (ret == 0)
 992                ret = ieee80211_verify_qos_info(&element_param->info_element,
 993                                                QOS_OUI_PARAM_SUB_TYPE);
 994        return ret;
 995}
 996
 997/*
 998 * Parse a QoS information element
 999 */
1000static int ieee80211_read_qos_info_element(struct
1001                                           ieee80211_qos_information_element
1002                                           *element_info, struct ieee80211_info_element
1003                                           *info_element)
1004{
1005        int ret = 0;
1006        u16 size = sizeof(struct ieee80211_qos_information_element) - 2;
1007
1008        if (element_info == NULL)
1009                return -1;
1010        if (info_element == NULL)
1011                return -1;
1012
1013        if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
1014                memcpy(element_info->qui, info_element->data,
1015                       info_element->len);
1016                element_info->elementID = info_element->id;
1017                element_info->length = info_element->len;
1018        } else
1019                ret = -1;
1020
1021        if (ret == 0)
1022                ret = ieee80211_verify_qos_info(element_info,
1023                                                QOS_OUI_INFO_SUB_TYPE);
1024        return ret;
1025}
1026
1027/*
1028 * Write QoS parameters from the ac parameters.
1029 */
1030static int ieee80211_qos_convert_ac_to_parameters(struct
1031                                                  ieee80211_qos_parameter_info
1032                                                  *param_elm, struct
1033                                                  ieee80211_qos_parameters
1034                                                  *qos_param)
1035{
1036        int rc = 0;
1037        int i;
1038        struct ieee80211_qos_ac_parameter *ac_params;
1039        u32 txop;
1040        u8 cw_min;
1041        u8 cw_max;
1042
1043        for (i = 0; i < QOS_QUEUE_NUM; i++) {
1044                ac_params = &(param_elm->ac_params_record[i]);
1045
1046                qos_param->aifs[i] = (ac_params->aci_aifsn) & 0x0F;
1047                qos_param->aifs[i] -= (qos_param->aifs[i] < 2) ? 0 : 2;
1048
1049                cw_min = ac_params->ecw_min_max & 0x0F;
1050                qos_param->cw_min[i] = cpu_to_le16((1 << cw_min) - 1);
1051
1052                cw_max = (ac_params->ecw_min_max & 0xF0) >> 4;
1053                qos_param->cw_max[i] = cpu_to_le16((1 << cw_max) - 1);
1054
1055                qos_param->flag[i] =
1056                    (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1057
1058                txop = le16_to_cpu(ac_params->tx_op_limit) * 32;
1059                qos_param->tx_op_limit[i] = cpu_to_le16(txop);
1060        }
1061        return rc;
1062}
1063
1064/*
1065 * we have a generic data element which it may contain QoS information or
1066 * parameters element. check the information element length to decide
1067 * which type to read
1068 */
1069static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
1070                                             *info_element,
1071                                             struct ieee80211_network *network)
1072{
1073        int rc = 0;
1074        struct ieee80211_qos_parameters *qos_param = NULL;
1075        struct ieee80211_qos_information_element qos_info_element;
1076
1077        rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);
1078
1079        if (rc == 0) {
1080                network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1081                network->flags |= NETWORK_HAS_QOS_INFORMATION;
1082        } else {
1083                struct ieee80211_qos_parameter_info param_element;
1084
1085                rc = ieee80211_read_qos_param_element(&param_element,
1086                                                      info_element);
1087                if (rc == 0) {
1088                        qos_param = &(network->qos_data.parameters);
1089                        ieee80211_qos_convert_ac_to_parameters(&param_element,
1090                                                               qos_param);
1091                        network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1092                        network->qos_data.param_count =
1093                            param_element.info_element.ac_info & 0x0F;
1094                }
1095        }
1096
1097        if (rc == 0) {
1098                IEEE80211_DEBUG_QOS("QoS is supported\n");
1099                network->qos_data.supported = 1;
1100        }
1101        return rc;
1102}
1103
1104#ifdef CONFIG_IEEE80211_DEBUG
1105#define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1106
1107static const char *get_info_element_string(u16 id)
1108{
1109        switch (id) {
1110                MFIE_STRING(SSID);
1111                MFIE_STRING(RATES);
1112                MFIE_STRING(FH_SET);
1113                MFIE_STRING(DS_SET);
1114                MFIE_STRING(CF_SET);
1115                MFIE_STRING(TIM);
1116                MFIE_STRING(IBSS_SET);
1117                MFIE_STRING(COUNTRY);
1118                MFIE_STRING(HOP_PARAMS);
1119                MFIE_STRING(HOP_TABLE);
1120                MFIE_STRING(REQUEST);
1121                MFIE_STRING(CHALLENGE);
1122                MFIE_STRING(POWER_CONSTRAINT);
1123                MFIE_STRING(POWER_CAPABILITY);
1124                MFIE_STRING(TPC_REQUEST);
1125                MFIE_STRING(TPC_REPORT);
1126                MFIE_STRING(SUPP_CHANNELS);
1127                MFIE_STRING(CSA);
1128                MFIE_STRING(MEASURE_REQUEST);
1129                MFIE_STRING(MEASURE_REPORT);
1130                MFIE_STRING(QUIET);
1131                MFIE_STRING(IBSS_DFS);
1132                MFIE_STRING(ERP_INFO);
1133                MFIE_STRING(RSN);
1134                MFIE_STRING(RATES_EX);
1135                MFIE_STRING(GENERIC);
1136                MFIE_STRING(QOS_PARAMETER);
1137        default:
1138                return "UNKNOWN";
1139        }
1140}
1141#endif
1142
1143static int ieee80211_parse_info_param(struct ieee80211_info_element
1144                                      *info_element, u16 length,
1145                                      struct ieee80211_network *network)
1146{
1147        u8 i;
1148#ifdef CONFIG_IEEE80211_DEBUG
1149        char rates_str[64];
1150        char *p;
1151#endif
1152
1153        while (length >= sizeof(*info_element)) {
1154                if (sizeof(*info_element) + info_element->len > length) {
1155                        IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
1156                                             "info_element->len + 2 > left : "
1157                                             "info_element->len+2=%zd left=%d, id=%d.\n",
1158                                             info_element->len +
1159                                             sizeof(*info_element),
1160                                             length, info_element->id);
1161                        /* We stop processing but don't return an error here
1162                         * because some misbehaviour APs break this rule. ie.
1163                         * Orinoco AP1000. */
1164                        break;
1165                }
1166
1167                switch (info_element->id) {
1168                case MFIE_TYPE_SSID:
1169                        if (ieee80211_is_empty_essid(info_element->data,
1170                                                     info_element->len)) {
1171                                network->flags |= NETWORK_EMPTY_ESSID;
1172                                break;
1173                        }
1174
1175                        network->ssid_len = min(info_element->len,
1176                                                (u8) IW_ESSID_MAX_SIZE);
1177                        memcpy(network->ssid, info_element->data,
1178                               network->ssid_len);
1179                        if (network->ssid_len < IW_ESSID_MAX_SIZE)
1180                                memset(network->ssid + network->ssid_len, 0,
1181                                       IW_ESSID_MAX_SIZE - network->ssid_len);
1182
1183                        IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1184                                             network->ssid, network->ssid_len);
1185                        break;
1186
1187                case MFIE_TYPE_RATES:
1188#ifdef CONFIG_IEEE80211_DEBUG
1189                        p = rates_str;
1190#endif
1191                        network->rates_len = min(info_element->len,
1192                                                 MAX_RATES_LENGTH);
1193                        for (i = 0; i < network->rates_len; i++) {
1194                                network->rates[i] = info_element->data[i];
1195#ifdef CONFIG_IEEE80211_DEBUG
1196                                p += snprintf(p, sizeof(rates_str) -
1197                                              (p - rates_str), "%02X ",
1198                                              network->rates[i]);
1199#endif
1200                                if (ieee80211_is_ofdm_rate
1201                                    (info_element->data[i])) {
1202                                        network->flags |= NETWORK_HAS_OFDM;
1203                                        if (info_element->data[i] &
1204                                            IEEE80211_BASIC_RATE_MASK)
1205                                                network->flags &=
1206                                                    ~NETWORK_HAS_CCK;
1207                                }
1208                        }
1209
1210                        IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1211                                             rates_str, network->rates_len);
1212                        break;
1213
1214                case MFIE_TYPE_RATES_EX:
1215#ifdef CONFIG_IEEE80211_DEBUG
1216                        p = rates_str;
1217#endif
1218                        network->rates_ex_len = min(info_element->len,
1219                                                    MAX_RATES_EX_LENGTH);
1220                        for (i = 0; i < network->rates_ex_len; i++) {
1221                                network->rates_ex[i] = info_element->data[i];
1222#ifdef CONFIG_IEEE80211_DEBUG
1223                                p += snprintf(p, sizeof(rates_str) -
1224                                              (p - rates_str), "%02X ",
1225                                              network->rates[i]);
1226#endif
1227                                if (ieee80211_is_ofdm_rate
1228                                    (info_element->data[i])) {
1229                                        network->flags |= NETWORK_HAS_OFDM;
1230                                        if (info_element->data[i] &
1231                                            IEEE80211_BASIC_RATE_MASK)
1232                                                network->flags &=
1233                                                    ~NETWORK_HAS_CCK;
1234                                }
1235                        }
1236
1237                        IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1238                                             rates_str, network->rates_ex_len);
1239                        break;
1240
1241                case MFIE_TYPE_DS_SET:
1242                        IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1243                                             info_element->data[0]);
1244                        network->channel = info_element->data[0];
1245                        break;
1246
1247                case MFIE_TYPE_FH_SET:
1248                        IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1249                        break;
1250
1251                case MFIE_TYPE_CF_SET:
1252                        IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1253                        break;
1254
1255                case MFIE_TYPE_TIM:
1256                        network->tim.tim_count = info_element->data[0];
1257                        network->tim.tim_period = info_element->data[1];
1258                        IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
1259                        break;
1260
1261                case MFIE_TYPE_ERP_INFO:
1262                        network->erp_value = info_element->data[0];
1263                        network->flags |= NETWORK_HAS_ERP_VALUE;
1264                        IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1265                                             network->erp_value);
1266                        break;
1267
1268                case MFIE_TYPE_IBSS_SET:
1269                        network->atim_window = info_element->data[0];
1270                        IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1271                                             network->atim_window);
1272                        break;
1273
1274                case MFIE_TYPE_CHALLENGE:
1275                        IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1276                        break;
1277
1278                case MFIE_TYPE_GENERIC:
1279                        IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1280                                             info_element->len);
1281                        if (!ieee80211_parse_qos_info_param_IE(info_element,
1282                                                               network))
1283                                break;
1284
1285                        if (info_element->len >= 4 &&
1286                            info_element->data[0] == 0x00 &&
1287                            info_element->data[1] == 0x50 &&
1288                            info_element->data[2] == 0xf2 &&
1289                            info_element->data[3] == 0x01) {
1290                                network->wpa_ie_len = min(info_element->len + 2,
1291                                                          MAX_WPA_IE_LEN);
1292                                memcpy(network->wpa_ie, info_element,
1293                                       network->wpa_ie_len);
1294                        }
1295                        break;
1296
1297                case MFIE_TYPE_RSN:
1298                        IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
1299                                             info_element->len);
1300                        network->rsn_ie_len = min(info_element->len + 2,
1301                                                  MAX_WPA_IE_LEN);
1302                        memcpy(network->rsn_ie, info_element,
1303                               network->rsn_ie_len);
1304                        break;
1305
1306                case MFIE_TYPE_QOS_PARAMETER:
1307                        printk(KERN_ERR
1308                               "QoS Error need to parse QOS_PARAMETER IE\n");
1309                        break;
1310                        /* 802.11h */
1311                case MFIE_TYPE_POWER_CONSTRAINT:
1312                        network->power_constraint = info_element->data[0];
1313                        network->flags |= NETWORK_HAS_POWER_CONSTRAINT;
1314                        break;
1315
1316                case MFIE_TYPE_CSA:
1317                        network->power_constraint = info_element->data[0];
1318                        network->flags |= NETWORK_HAS_CSA;
1319                        break;
1320
1321                case MFIE_TYPE_QUIET:
1322                        network->quiet.count = info_element->data[0];
1323                        network->quiet.period = info_element->data[1];
1324                        network->quiet.duration = info_element->data[2];
1325                        network->quiet.offset = info_element->data[3];
1326                        network->flags |= NETWORK_HAS_QUIET;
1327                        break;
1328
1329                case MFIE_TYPE_IBSS_DFS:
1330                        if (network->ibss_dfs)
1331                                break;
1332                        network->ibss_dfs = kmemdup(info_element->data,
1333                                                    info_element->len,
1334                                                    GFP_ATOMIC);
1335                        if (!network->ibss_dfs)
1336                                return 1;
1337                        network->flags |= NETWORK_HAS_IBSS_DFS;
1338                        break;
1339
1340                case MFIE_TYPE_TPC_REPORT:
1341                        network->tpc_report.transmit_power =
1342                            info_element->data[0];
1343                        network->tpc_report.link_margin = info_element->data[1];
1344                        network->flags |= NETWORK_HAS_TPC_REPORT;
1345                        break;
1346
1347                default:
1348                        IEEE80211_DEBUG_MGMT
1349                            ("Unsupported info element: %s (%d)\n",
1350                             get_info_element_string(info_element->id),
1351                             info_element->id);
1352                        break;
1353                }
1354
1355                length -= sizeof(*info_element) + info_element->len;
1356                info_element =
1357                    (struct ieee80211_info_element *)&info_element->
1358                    data[info_element->len];
1359        }
1360
1361        return 0;
1362}
1363
1364static int ieee80211_handle_assoc_resp(struct ieee80211_device *ieee, struct ieee80211_assoc_response
1365                                       *frame, struct ieee80211_rx_stats *stats)
1366{
1367        struct ieee80211_network network_resp = {
1368                .ibss_dfs = NULL,
1369        };
1370        struct ieee80211_network *network = &network_resp;
1371        struct net_device *dev = ieee->dev;
1372
1373        network->flags = 0;
1374        network->qos_data.active = 0;
1375        network->qos_data.supported = 0;
1376        network->qos_data.param_count = 0;
1377        network->qos_data.old_param_count = 0;
1378
1379        //network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF);
1380        network->atim_window = le16_to_cpu(frame->aid);
1381        network->listen_interval = le16_to_cpu(frame->status);
1382        memcpy(network->bssid, frame->header.addr3, ETH_ALEN);
1383        network->capability = le16_to_cpu(frame->capability);
1384        network->last_scanned = jiffies;
1385        network->rates_len = network->rates_ex_len = 0;
1386        network->last_associate = 0;
1387        network->ssid_len = 0;
1388        network->erp_value =
1389            (network->capability & WLAN_CAPABILITY_IBSS) ? 0x3 : 0x0;
1390
1391        if (stats->freq == IEEE80211_52GHZ_BAND) {
1392                /* for A band (No DS info) */
1393                network->channel = stats->received_channel;
1394        } else
1395                network->flags |= NETWORK_HAS_CCK;
1396
1397        network->wpa_ie_len = 0;
1398        network->rsn_ie_len = 0;
1399
1400        if (ieee80211_parse_info_param
1401            (frame->info_element, stats->len - sizeof(*frame), network))
1402                return 1;
1403
1404        network->mode = 0;
1405        if (stats->freq == IEEE80211_52GHZ_BAND)
1406                network->mode = IEEE_A;
1407        else {
1408                if (network->flags & NETWORK_HAS_OFDM)
1409                        network->mode |= IEEE_G;
1410                if (network->flags & NETWORK_HAS_CCK)
1411                        network->mode |= IEEE_B;
1412        }
1413
1414        if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
1415                network->flags |= NETWORK_EMPTY_ESSID;
1416
1417        memcpy(&network->stats, stats, sizeof(network->stats));
1418
1419        if (ieee->handle_assoc_response != NULL)
1420                ieee->handle_assoc_response(dev, frame, network);
1421
1422        return 0;
1423}
1424
1425/***************************************************/
1426
1427static int ieee80211_network_init(struct ieee80211_device *ieee, struct ieee80211_probe_response
1428                                         *beacon,
1429                                         struct ieee80211_network *network,
1430                                         struct ieee80211_rx_stats *stats)
1431{
1432        DECLARE_MAC_BUF(mac);
1433
1434        network->qos_data.active = 0;
1435        network->qos_data.supported = 0;
1436        network->qos_data.param_count = 0;
1437        network->qos_data.old_param_count = 0;
1438
1439        /* Pull out fixed field data */
1440        memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
1441        network->capability = le16_to_cpu(beacon->capability);
1442        network->last_scanned = jiffies;
1443        network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
1444        network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
1445        network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
1446        /* Where to pull this? beacon->listen_interval; */
1447        network->listen_interval = 0x0A;
1448        network->rates_len = network->rates_ex_len = 0;
1449        network->last_associate = 0;
1450        network->ssid_len = 0;
1451        network->flags = 0;
1452        network->atim_window = 0;
1453        network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
1454            0x3 : 0x0;
1455
1456        if (stats->freq == IEEE80211_52GHZ_BAND) {
1457                /* for A band (No DS info) */
1458                network->channel = stats->received_channel;
1459        } else
1460                network->flags |= NETWORK_HAS_CCK;
1461
1462        network->wpa_ie_len = 0;
1463        network->rsn_ie_len = 0;
1464
1465        if (ieee80211_parse_info_param
1466            (beacon->info_element, stats->len - sizeof(*beacon), network))
1467                return 1;
1468
1469        network->mode = 0;
1470        if (stats->freq == IEEE80211_52GHZ_BAND)
1471                network->mode = IEEE_A;
1472        else {
1473                if (network->flags & NETWORK_HAS_OFDM)
1474                        network->mode |= IEEE_G;
1475                if (network->flags & NETWORK_HAS_CCK)
1476                        network->mode |= IEEE_B;
1477        }
1478
1479        if (network->mode == 0) {
1480                IEEE80211_DEBUG_SCAN("Filtered out '%s (%s)' "
1481                                     "network.\n",
1482                                     escape_essid(network->ssid,
1483                                                  network->ssid_len),
1484                                     print_mac(mac, network->bssid));
1485                return 1;
1486        }
1487
1488        if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
1489                network->flags |= NETWORK_EMPTY_ESSID;
1490
1491        memcpy(&network->stats, stats, sizeof(network->stats));
1492
1493        return 0;
1494}
1495
1496static inline int is_same_network(struct ieee80211_network *src,
1497                                  struct ieee80211_network *dst)
1498{
1499        /* A network is only a duplicate if the channel, BSSID, and ESSID
1500         * all match.  We treat all <hidden> with the same BSSID and channel
1501         * as one network */
1502        return ((src->ssid_len == dst->ssid_len) &&
1503                (src->channel == dst->channel) &&
1504                !compare_ether_addr(src->bssid, dst->bssid) &&
1505                !memcmp(src->ssid, dst->ssid, src->ssid_len));
1506}
1507
1508static void update_network(struct ieee80211_network *dst,
1509                                  struct ieee80211_network *src)
1510{
1511        int qos_active;
1512        u8 old_param;
1513        DECLARE_MAC_BUF(mac);
1514
1515        ieee80211_network_reset(dst);
1516        dst->ibss_dfs = src->ibss_dfs;
1517
1518        /* We only update the statistics if they were created by receiving
1519         * the network information on the actual channel the network is on.
1520         *
1521         * This keeps beacons received on neighbor channels from bringing
1522         * down the signal level of an AP. */
1523        if (dst->channel == src->stats.received_channel)
1524                memcpy(&dst->stats, &src->stats,
1525                       sizeof(struct ieee80211_rx_stats));
1526        else
1527                IEEE80211_DEBUG_SCAN("Network %s info received "
1528                        "off channel (%d vs. %d)\n", print_mac(mac, src->bssid),
1529                        dst->channel, src->stats.received_channel);
1530
1531        dst->capability = src->capability;
1532        memcpy(dst->rates, src->rates, src->rates_len);
1533        dst->rates_len = src->rates_len;
1534        memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
1535        dst->rates_ex_len = src->rates_ex_len;
1536
1537        dst->mode = src->mode;
1538        dst->flags = src->flags;
1539        dst->time_stamp[0] = src->time_stamp[0];
1540        dst->time_stamp[1] = src->time_stamp[1];
1541
1542        dst->beacon_interval = src->beacon_interval;
1543        dst->listen_interval = src->listen_interval;
1544        dst->atim_window = src->atim_window;
1545        dst->erp_value = src->erp_value;
1546        dst->tim = src->tim;
1547
1548        memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
1549        dst->wpa_ie_len = src->wpa_ie_len;
1550        memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
1551        dst->rsn_ie_len = src->rsn_ie_len;
1552
1553        dst->last_scanned = jiffies;
1554        qos_active = src->qos_data.active;
1555        old_param = dst->qos_data.old_param_count;
1556        if (dst->flags & NETWORK_HAS_QOS_MASK)
1557                memcpy(&dst->qos_data, &src->qos_data,
1558                       sizeof(struct ieee80211_qos_data));
1559        else {
1560                dst->qos_data.supported = src->qos_data.supported;
1561                dst->qos_data.param_count = src->qos_data.param_count;
1562        }
1563
1564        if (dst->qos_data.supported == 1) {
1565                if (dst->ssid_len)
1566                        IEEE80211_DEBUG_QOS
1567                            ("QoS the network %s is QoS supported\n",
1568                             dst->ssid);
1569                else
1570                        IEEE80211_DEBUG_QOS
1571                            ("QoS the network is QoS supported\n");
1572        }
1573        dst->qos_data.active = qos_active;
1574        dst->qos_data.old_param_count = old_param;
1575
1576        /* dst->last_associate is not overwritten */
1577}
1578
1579static inline int is_beacon(__le16 fc)
1580{
1581        return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
1582}
1583
1584static void ieee80211_process_probe_response(struct ieee80211_device
1585                                                    *ieee, struct
1586                                                    ieee80211_probe_response
1587                                                    *beacon, struct ieee80211_rx_stats
1588                                                    *stats)
1589{
1590        struct net_device *dev = ieee->dev;
1591        struct ieee80211_network network = {
1592                .ibss_dfs = NULL,
1593        };
1594        struct ieee80211_network *target;
1595        struct ieee80211_network *oldest = NULL;
1596#ifdef CONFIG_IEEE80211_DEBUG
1597        struct ieee80211_info_element *info_element = beacon->info_element;
1598#endif
1599        unsigned long flags;
1600        DECLARE_MAC_BUF(mac);
1601
1602        IEEE80211_DEBUG_SCAN("'%s' (%s"
1603                     "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1604                     escape_essid(info_element->data, info_element->len),
1605                     print_mac(mac, beacon->header.addr3),
1606                     (beacon->capability & cpu_to_le16(1 << 0xf)) ? '1' : '0',
1607                     (beacon->capability & cpu_to_le16(1 << 0xe)) ? '1' : '0',
1608                     (beacon->capability & cpu_to_le16(1 << 0xd)) ? '1' : '0',
1609                     (beacon->capability & cpu_to_le16(1 << 0xc)) ? '1' : '0',
1610                     (beacon->capability & cpu_to_le16(1 << 0xb)) ? '1' : '0',
1611                     (beacon->capability & cpu_to_le16(1 << 0xa)) ? '1' : '0',
1612                     (beacon->capability & cpu_to_le16(1 << 0x9)) ? '1' : '0',
1613                     (beacon->capability & cpu_to_le16(1 << 0x8)) ? '1' : '0',
1614                     (beacon->capability & cpu_to_le16(1 << 0x7)) ? '1' : '0',
1615                     (beacon->capability & cpu_to_le16(1 << 0x6)) ? '1' : '0',
1616                     (beacon->capability & cpu_to_le16(1 << 0x5)) ? '1' : '0',
1617                     (beacon->capability & cpu_to_le16(1 << 0x4)) ? '1' : '0',
1618                     (beacon->capability & cpu_to_le16(1 << 0x3)) ? '1' : '0',
1619                     (beacon->capability & cpu_to_le16(1 << 0x2)) ? '1' : '0',
1620                     (beacon->capability & cpu_to_le16(1 << 0x1)) ? '1' : '0',
1621                     (beacon->capability & cpu_to_le16(1 << 0x0)) ? '1' : '0');
1622
1623        if (ieee80211_network_init(ieee, beacon, &network, stats)) {
1624                IEEE80211_DEBUG_SCAN("Dropped '%s' (%s) via %s.\n",
1625                                     escape_essid(info_element->data,
1626                                                  info_element->len),
1627                                     print_mac(mac, beacon->header.addr3),
1628                                     is_beacon(beacon->header.frame_ctl) ?
1629                                     "BEACON" : "PROBE RESPONSE");
1630                return;
1631        }
1632
1633        /* The network parsed correctly -- so now we scan our known networks
1634         * to see if we can find it in our list.
1635         *
1636         * NOTE:  This search is definitely not optimized.  Once its doing
1637         *        the "right thing" we'll optimize it for efficiency if
1638         *        necessary */
1639
1640        /* Search for this entry in the list and update it if it is
1641         * already there. */
1642
1643        spin_lock_irqsave(&ieee->lock, flags);
1644
1645        list_for_each_entry(target, &ieee->network_list, list) {
1646                if (is_same_network(target, &network))
1647                        break;
1648
1649                if ((oldest == NULL) ||
1650                    (target->last_scanned < oldest->last_scanned))
1651                        oldest = target;
1652        }
1653
1654        /* If we didn't find a match, then get a new network slot to initialize
1655         * with this beacon's information */
1656        if (&target->list == &ieee->network_list) {
1657                if (list_empty(&ieee->network_free_list)) {
1658                        /* If there are no more slots, expire the oldest */
1659                        list_del(&oldest->list);
1660                        target = oldest;
1661                        IEEE80211_DEBUG_SCAN("Expired '%s' (%s) from "
1662                                             "network list.\n",
1663                                             escape_essid(target->ssid,
1664                                                          target->ssid_len),
1665                                             print_mac(mac, target->bssid));
1666                        ieee80211_network_reset(target);
1667                } else {
1668                        /* Otherwise just pull from the free list */
1669                        target = list_entry(ieee->network_free_list.next,
1670                                            struct ieee80211_network, list);
1671                        list_del(ieee->network_free_list.next);
1672                }
1673
1674#ifdef CONFIG_IEEE80211_DEBUG
1675                IEEE80211_DEBUG_SCAN("Adding '%s' (%s) via %s.\n",
1676                                     escape_essid(network.ssid,
1677                                                  network.ssid_len),
1678                                     print_mac(mac, network.bssid),
1679                                     is_beacon(beacon->header.frame_ctl) ?
1680                                     "BEACON" : "PROBE RESPONSE");
1681#endif
1682                memcpy(target, &network, sizeof(*target));
1683                network.ibss_dfs = NULL;
1684                list_add_tail(&target->list, &ieee->network_list);
1685        } else {
1686                IEEE80211_DEBUG_SCAN("Updating '%s' (%s) via %s.\n",
1687                                     escape_essid(target->ssid,
1688                                                  target->ssid_len),
1689                                     print_mac(mac, target->bssid),
1690                                     is_beacon(beacon->header.frame_ctl) ?
1691                                     "BEACON" : "PROBE RESPONSE");
1692                update_network(target, &network);
1693                network.ibss_dfs = NULL;
1694        }
1695
1696        spin_unlock_irqrestore(&ieee->lock, flags);
1697
1698        if (is_beacon(beacon->header.frame_ctl)) {
1699                if (ieee->handle_beacon != NULL)
1700                        ieee->handle_beacon(dev, beacon, target);
1701        } else {
1702                if (ieee->handle_probe_response != NULL)
1703                        ieee->handle_probe_response(dev, beacon, target);
1704        }
1705}
1706
1707void ieee80211_rx_mgt(struct ieee80211_device *ieee,
1708                      struct ieee80211_hdr_4addr *header,
1709                      struct ieee80211_rx_stats *stats)
1710{
1711        switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
1712        case IEEE80211_STYPE_ASSOC_RESP:
1713                IEEE80211_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
1714                                     WLAN_FC_GET_STYPE(le16_to_cpu
1715                                                       (header->frame_ctl)));
1716                ieee80211_handle_assoc_resp(ieee,
1717                                            (struct ieee80211_assoc_response *)
1718                                            header, stats);
1719                break;
1720
1721        case IEEE80211_STYPE_REASSOC_RESP:
1722                IEEE80211_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
1723                                     WLAN_FC_GET_STYPE(le16_to_cpu
1724                                                       (header->frame_ctl)));
1725                break;
1726
1727        case IEEE80211_STYPE_PROBE_REQ:
1728                IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1729                                     WLAN_FC_GET_STYPE(le16_to_cpu
1730                                                       (header->frame_ctl)));
1731
1732                if (ieee->handle_probe_request != NULL)
1733                        ieee->handle_probe_request(ieee->dev,
1734                                                   (struct
1735                                                    ieee80211_probe_request *)
1736                                                   header, stats);
1737                break;
1738
1739        case IEEE80211_STYPE_PROBE_RESP:
1740                IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1741                                     WLAN_FC_GET_STYPE(le16_to_cpu
1742                                                       (header->frame_ctl)));
1743                IEEE80211_DEBUG_SCAN("Probe response\n");
1744                ieee80211_process_probe_response(ieee,
1745                                                 (struct
1746                                                  ieee80211_probe_response *)
1747                                                 header, stats);
1748                break;
1749
1750        case IEEE80211_STYPE_BEACON:
1751                IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
1752                                     WLAN_FC_GET_STYPE(le16_to_cpu
1753                                                       (header->frame_ctl)));
1754                IEEE80211_DEBUG_SCAN("Beacon\n");
1755                ieee80211_process_probe_response(ieee,
1756                                                 (struct
1757                                                  ieee80211_probe_response *)
1758                                                 header, stats);
1759                break;
1760        case IEEE80211_STYPE_AUTH:
1761
1762                IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1763                                     WLAN_FC_GET_STYPE(le16_to_cpu
1764                                                       (header->frame_ctl)));
1765
1766                if (ieee->handle_auth != NULL)
1767                        ieee->handle_auth(ieee->dev,
1768                                          (struct ieee80211_auth *)header);
1769                break;
1770
1771        case IEEE80211_STYPE_DISASSOC:
1772                if (ieee->handle_disassoc != NULL)
1773                        ieee->handle_disassoc(ieee->dev,
1774                                              (struct ieee80211_disassoc *)
1775                                              header);
1776                break;
1777
1778        case IEEE80211_STYPE_ACTION:
1779                IEEE80211_DEBUG_MGMT("ACTION\n");
1780                if (ieee->handle_action)
1781                        ieee->handle_action(ieee->dev,
1782                                            (struct ieee80211_action *)
1783                                            header, stats);
1784                break;
1785
1786        case IEEE80211_STYPE_REASSOC_REQ:
1787                IEEE80211_DEBUG_MGMT("received reassoc (%d)\n",
1788                                     WLAN_FC_GET_STYPE(le16_to_cpu
1789                                                       (header->frame_ctl)));
1790
1791                IEEE80211_DEBUG_MGMT("%s: IEEE80211_REASSOC_REQ received\n",
1792                                     ieee->dev->name);
1793                if (ieee->handle_reassoc_request != NULL)
1794                        ieee->handle_reassoc_request(ieee->dev,
1795                                                    (struct ieee80211_reassoc_request *)
1796                                                     header);
1797                break;
1798
1799        case IEEE80211_STYPE_ASSOC_REQ:
1800                IEEE80211_DEBUG_MGMT("received assoc (%d)\n",
1801                                     WLAN_FC_GET_STYPE(le16_to_cpu
1802                                                       (header->frame_ctl)));
1803
1804                IEEE80211_DEBUG_MGMT("%s: IEEE80211_ASSOC_REQ received\n",
1805                                     ieee->dev->name);
1806                if (ieee->handle_assoc_request != NULL)
1807                        ieee->handle_assoc_request(ieee->dev);
1808                break;
1809
1810        case IEEE80211_STYPE_DEAUTH:
1811                IEEE80211_DEBUG_MGMT("DEAUTH\n");
1812                if (ieee->handle_deauth != NULL)
1813                        ieee->handle_deauth(ieee->dev,
1814                                            (struct ieee80211_deauth *)
1815                                            header);
1816                break;
1817        default:
1818                IEEE80211_DEBUG_MGMT("received UNKNOWN (%d)\n",
1819                                     WLAN_FC_GET_STYPE(le16_to_cpu
1820                                                       (header->frame_ctl)));
1821                IEEE80211_DEBUG_MGMT("%s: Unknown management packet: %d\n",
1822                                     ieee->dev->name,
1823                                     WLAN_FC_GET_STYPE(le16_to_cpu
1824                                                       (header->frame_ctl)));
1825                break;
1826        }
1827}
1828
1829EXPORT_SYMBOL_GPL(ieee80211_rx_any);
1830EXPORT_SYMBOL(ieee80211_rx_mgt);
1831EXPORT_SYMBOL(ieee80211_rx);
1832
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