linux/drivers/net/wireless/intel/ipw2x00/libipw_rx.c
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   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * Original code based Host AP (software wireless LAN access point) driver
   4 * for Intersil Prism2/2.5/3 - hostap.o module, common routines
   5 *
   6 * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   7 * <j@w1.fi>
   8 * Copyright (c) 2002-2003, Jouni Malinen <j@w1.fi>
   9 * Copyright (c) 2004-2005, Intel Corporation
  10 */
  11
  12#include <linux/compiler.h>
  13#include <linux/errno.h>
  14#include <linux/if_arp.h>
  15#include <linux/in6.h>
  16#include <linux/gfp.h>
  17#include <linux/in.h>
  18#include <linux/ip.h>
  19#include <linux/kernel.h>
  20#include <linux/module.h>
  21#include <linux/netdevice.h>
  22#include <linux/proc_fs.h>
  23#include <linux/skbuff.h>
  24#include <linux/tcp.h>
  25#include <linux/types.h>
  26#include <linux/wireless.h>
  27#include <linux/etherdevice.h>
  28#include <linux/uaccess.h>
  29#include <linux/ctype.h>
  30
  31#include <net/lib80211.h>
  32
  33#include "libipw.h"
  34
  35static void libipw_monitor_rx(struct libipw_device *ieee,
  36                                        struct sk_buff *skb,
  37                                        struct libipw_rx_stats *rx_stats)
  38{
  39        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
  40        u16 fc = le16_to_cpu(hdr->frame_control);
  41
  42        skb->dev = ieee->dev;
  43        skb_reset_mac_header(skb);
  44        skb_pull(skb, libipw_get_hdrlen(fc));
  45        skb->pkt_type = PACKET_OTHERHOST;
  46        skb->protocol = htons(ETH_P_80211_RAW);
  47        memset(skb->cb, 0, sizeof(skb->cb));
  48        netif_rx(skb);
  49}
  50
  51/* Called only as a tasklet (software IRQ) */
  52static struct libipw_frag_entry *libipw_frag_cache_find(struct
  53                                                              libipw_device
  54                                                              *ieee,
  55                                                              unsigned int seq,
  56                                                              unsigned int frag,
  57                                                              u8 * src,
  58                                                              u8 * dst)
  59{
  60        struct libipw_frag_entry *entry;
  61        int i;
  62
  63        for (i = 0; i < LIBIPW_FRAG_CACHE_LEN; i++) {
  64                entry = &ieee->frag_cache[i];
  65                if (entry->skb != NULL &&
  66                    time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
  67                        LIBIPW_DEBUG_FRAG("expiring fragment cache entry "
  68                                             "seq=%u last_frag=%u\n",
  69                                             entry->seq, entry->last_frag);
  70                        dev_kfree_skb_any(entry->skb);
  71                        entry->skb = NULL;
  72                }
  73
  74                if (entry->skb != NULL && entry->seq == seq &&
  75                    (entry->last_frag + 1 == frag || frag == -1) &&
  76                    ether_addr_equal(entry->src_addr, src) &&
  77                    ether_addr_equal(entry->dst_addr, dst))
  78                        return entry;
  79        }
  80
  81        return NULL;
  82}
  83
  84/* Called only as a tasklet (software IRQ) */
  85static struct sk_buff *libipw_frag_cache_get(struct libipw_device *ieee,
  86                                                struct libipw_hdr_4addr *hdr)
  87{
  88        struct sk_buff *skb = NULL;
  89        u16 sc;
  90        unsigned int frag, seq;
  91        struct libipw_frag_entry *entry;
  92
  93        sc = le16_to_cpu(hdr->seq_ctl);
  94        frag = WLAN_GET_SEQ_FRAG(sc);
  95        seq = WLAN_GET_SEQ_SEQ(sc);
  96
  97        if (frag == 0) {
  98                /* Reserve enough space to fit maximum frame length */
  99                skb = dev_alloc_skb(ieee->dev->mtu +
 100                                    sizeof(struct libipw_hdr_4addr) +
 101                                    8 /* LLC */  +
 102                                    2 /* alignment */  +
 103                                    8 /* WEP */  + ETH_ALEN /* WDS */ );
 104                if (skb == NULL)
 105                        return NULL;
 106
 107                entry = &ieee->frag_cache[ieee->frag_next_idx];
 108                ieee->frag_next_idx++;
 109                if (ieee->frag_next_idx >= LIBIPW_FRAG_CACHE_LEN)
 110                        ieee->frag_next_idx = 0;
 111
 112                if (entry->skb != NULL)
 113                        dev_kfree_skb_any(entry->skb);
 114
 115                entry->first_frag_time = jiffies;
 116                entry->seq = seq;
 117                entry->last_frag = frag;
 118                entry->skb = skb;
 119                memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
 120                memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
 121        } else {
 122                /* received a fragment of a frame for which the head fragment
 123                 * should have already been received */
 124                entry = libipw_frag_cache_find(ieee, seq, frag, hdr->addr2,
 125                                                  hdr->addr1);
 126                if (entry != NULL) {
 127                        entry->last_frag = frag;
 128                        skb = entry->skb;
 129                }
 130        }
 131
 132        return skb;
 133}
 134
 135/* Called only as a tasklet (software IRQ) */
 136static int libipw_frag_cache_invalidate(struct libipw_device *ieee,
 137                                           struct libipw_hdr_4addr *hdr)
 138{
 139        u16 sc;
 140        unsigned int seq;
 141        struct libipw_frag_entry *entry;
 142
 143        sc = le16_to_cpu(hdr->seq_ctl);
 144        seq = WLAN_GET_SEQ_SEQ(sc);
 145
 146        entry = libipw_frag_cache_find(ieee, seq, -1, hdr->addr2,
 147                                          hdr->addr1);
 148
 149        if (entry == NULL) {
 150                LIBIPW_DEBUG_FRAG("could not invalidate fragment cache "
 151                                     "entry (seq=%u)\n", seq);
 152                return -1;
 153        }
 154
 155        entry->skb = NULL;
 156        return 0;
 157}
 158
 159#ifdef NOT_YET
 160/* libipw_rx_frame_mgtmt
 161 *
 162 * Responsible for handling management control frames
 163 *
 164 * Called by libipw_rx */
 165static int
 166libipw_rx_frame_mgmt(struct libipw_device *ieee, struct sk_buff *skb,
 167                        struct libipw_rx_stats *rx_stats, u16 type,
 168                        u16 stype)
 169{
 170        if (ieee->iw_mode == IW_MODE_MASTER) {
 171                printk(KERN_DEBUG "%s: Master mode not yet supported.\n",
 172                       ieee->dev->name);
 173                return 0;
 174/*
 175  hostap_update_sta_ps(ieee, (struct hostap_libipw_hdr_4addr *)
 176  skb->data);*/
 177        }
 178
 179        if (ieee->hostapd && type == WLAN_FC_TYPE_MGMT) {
 180                if (stype == WLAN_FC_STYPE_BEACON &&
 181                    ieee->iw_mode == IW_MODE_MASTER) {
 182                        struct sk_buff *skb2;
 183                        /* Process beacon frames also in kernel driver to
 184                         * update STA(AP) table statistics */
 185                        skb2 = skb_clone(skb, GFP_ATOMIC);
 186                        if (skb2)
 187                                hostap_rx(skb2->dev, skb2, rx_stats);
 188                }
 189
 190                /* send management frames to the user space daemon for
 191                 * processing */
 192                ieee->apdevstats.rx_packets++;
 193                ieee->apdevstats.rx_bytes += skb->len;
 194                prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
 195                return 0;
 196        }
 197
 198        if (ieee->iw_mode == IW_MODE_MASTER) {
 199                if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
 200                        printk(KERN_DEBUG "%s: unknown management frame "
 201                               "(type=0x%02x, stype=0x%02x) dropped\n",
 202                               skb->dev->name, type, stype);
 203                        return -1;
 204                }
 205
 206                hostap_rx(skb->dev, skb, rx_stats);
 207                return 0;
 208        }
 209
 210        printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame "
 211               "received in non-Host AP mode\n", skb->dev->name);
 212        return -1;
 213}
 214#endif
 215
 216/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
 217/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
 218static unsigned char libipw_rfc1042_header[] =
 219    { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
 220
 221/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
 222static unsigned char libipw_bridge_tunnel_header[] =
 223    { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
 224/* No encapsulation header if EtherType < 0x600 (=length) */
 225
 226/* Called by libipw_rx_frame_decrypt */
 227static int libipw_is_eapol_frame(struct libipw_device *ieee,
 228                                    struct sk_buff *skb)
 229{
 230        struct net_device *dev = ieee->dev;
 231        u16 fc, ethertype;
 232        struct libipw_hdr_3addr *hdr;
 233        u8 *pos;
 234
 235        if (skb->len < 24)
 236                return 0;
 237
 238        hdr = (struct libipw_hdr_3addr *)skb->data;
 239        fc = le16_to_cpu(hdr->frame_ctl);
 240
 241        /* check that the frame is unicast frame to us */
 242        if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 243            IEEE80211_FCTL_TODS &&
 244            ether_addr_equal(hdr->addr1, dev->dev_addr) &&
 245            ether_addr_equal(hdr->addr3, dev->dev_addr)) {
 246                /* ToDS frame with own addr BSSID and DA */
 247        } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 248                   IEEE80211_FCTL_FROMDS &&
 249                   ether_addr_equal(hdr->addr1, dev->dev_addr)) {
 250                /* FromDS frame with own addr as DA */
 251        } else
 252                return 0;
 253
 254        if (skb->len < 24 + 8)
 255                return 0;
 256
 257        /* check for port access entity Ethernet type */
 258        pos = skb->data + 24;
 259        ethertype = (pos[6] << 8) | pos[7];
 260        if (ethertype == ETH_P_PAE)
 261                return 1;
 262
 263        return 0;
 264}
 265
 266/* Called only as a tasklet (software IRQ), by libipw_rx */
 267static int
 268libipw_rx_frame_decrypt(struct libipw_device *ieee, struct sk_buff *skb,
 269                           struct lib80211_crypt_data *crypt)
 270{
 271        struct libipw_hdr_3addr *hdr;
 272        int res, hdrlen;
 273
 274        if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
 275                return 0;
 276
 277        hdr = (struct libipw_hdr_3addr *)skb->data;
 278        hdrlen = libipw_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 279
 280        atomic_inc(&crypt->refcnt);
 281        res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
 282        atomic_dec(&crypt->refcnt);
 283        if (res < 0) {
 284                LIBIPW_DEBUG_DROP("decryption failed (SA=%pM) res=%d\n",
 285                                     hdr->addr2, res);
 286                if (res == -2)
 287                        LIBIPW_DEBUG_DROP("Decryption failed ICV "
 288                                             "mismatch (key %d)\n",
 289                                             skb->data[hdrlen + 3] >> 6);
 290                ieee->ieee_stats.rx_discards_undecryptable++;
 291                return -1;
 292        }
 293
 294        return res;
 295}
 296
 297/* Called only as a tasklet (software IRQ), by libipw_rx */
 298static int
 299libipw_rx_frame_decrypt_msdu(struct libipw_device *ieee,
 300                                struct sk_buff *skb, int keyidx,
 301                                struct lib80211_crypt_data *crypt)
 302{
 303        struct libipw_hdr_3addr *hdr;
 304        int res, hdrlen;
 305
 306        if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
 307                return 0;
 308
 309        hdr = (struct libipw_hdr_3addr *)skb->data;
 310        hdrlen = libipw_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 311
 312        atomic_inc(&crypt->refcnt);
 313        res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
 314        atomic_dec(&crypt->refcnt);
 315        if (res < 0) {
 316                printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
 317                       " (SA=%pM keyidx=%d)\n", ieee->dev->name, hdr->addr2,
 318                       keyidx);
 319                return -1;
 320        }
 321
 322        return 0;
 323}
 324
 325/* All received frames are sent to this function. @skb contains the frame in
 326 * IEEE 802.11 format, i.e., in the format it was sent over air.
 327 * This function is called only as a tasklet (software IRQ). */
 328int libipw_rx(struct libipw_device *ieee, struct sk_buff *skb,
 329                 struct libipw_rx_stats *rx_stats)
 330{
 331        struct net_device *dev = ieee->dev;
 332        struct libipw_hdr_4addr *hdr;
 333        size_t hdrlen;
 334        u16 fc, type, stype, sc;
 335        unsigned int frag;
 336        u8 *payload;
 337        u16 ethertype;
 338#ifdef NOT_YET
 339        struct net_device *wds = NULL;
 340        struct sk_buff *skb2 = NULL;
 341        struct net_device *wds = NULL;
 342        int frame_authorized = 0;
 343        int from_assoc_ap = 0;
 344        void *sta = NULL;
 345#endif
 346        u8 dst[ETH_ALEN];
 347        u8 src[ETH_ALEN];
 348        struct lib80211_crypt_data *crypt = NULL;
 349        int keyidx = 0;
 350        int can_be_decrypted = 0;
 351
 352        hdr = (struct libipw_hdr_4addr *)skb->data;
 353        if (skb->len < 10) {
 354                printk(KERN_INFO "%s: SKB length < 10\n", dev->name);
 355                goto rx_dropped;
 356        }
 357
 358        fc = le16_to_cpu(hdr->frame_ctl);
 359        type = WLAN_FC_GET_TYPE(fc);
 360        stype = WLAN_FC_GET_STYPE(fc);
 361        sc = le16_to_cpu(hdr->seq_ctl);
 362        frag = WLAN_GET_SEQ_FRAG(sc);
 363        hdrlen = libipw_get_hdrlen(fc);
 364
 365        if (skb->len < hdrlen) {
 366                printk(KERN_INFO "%s: invalid SKB length %d\n",
 367                        dev->name, skb->len);
 368                goto rx_dropped;
 369        }
 370
 371        /* Put this code here so that we avoid duplicating it in all
 372         * Rx paths. - Jean II */
 373#ifdef CONFIG_WIRELESS_EXT
 374#ifdef IW_WIRELESS_SPY          /* defined in iw_handler.h */
 375        /* If spy monitoring on */
 376        if (ieee->spy_data.spy_number > 0) {
 377                struct iw_quality wstats;
 378
 379                wstats.updated = 0;
 380                if (rx_stats->mask & LIBIPW_STATMASK_RSSI) {
 381                        wstats.level = rx_stats->signal;
 382                        wstats.updated |= IW_QUAL_LEVEL_UPDATED;
 383                } else
 384                        wstats.updated |= IW_QUAL_LEVEL_INVALID;
 385
 386                if (rx_stats->mask & LIBIPW_STATMASK_NOISE) {
 387                        wstats.noise = rx_stats->noise;
 388                        wstats.updated |= IW_QUAL_NOISE_UPDATED;
 389                } else
 390                        wstats.updated |= IW_QUAL_NOISE_INVALID;
 391
 392                if (rx_stats->mask & LIBIPW_STATMASK_SIGNAL) {
 393                        wstats.qual = rx_stats->signal;
 394                        wstats.updated |= IW_QUAL_QUAL_UPDATED;
 395                } else
 396                        wstats.updated |= IW_QUAL_QUAL_INVALID;
 397
 398                /* Update spy records */
 399                wireless_spy_update(ieee->dev, hdr->addr2, &wstats);
 400        }
 401#endif                          /* IW_WIRELESS_SPY */
 402#endif                          /* CONFIG_WIRELESS_EXT */
 403
 404#ifdef NOT_YET
 405        hostap_update_rx_stats(local->ap, hdr, rx_stats);
 406#endif
 407
 408        if (ieee->iw_mode == IW_MODE_MONITOR) {
 409                dev->stats.rx_packets++;
 410                dev->stats.rx_bytes += skb->len;
 411                libipw_monitor_rx(ieee, skb, rx_stats);
 412                return 1;
 413        }
 414
 415        can_be_decrypted = (is_multicast_ether_addr(hdr->addr1) ||
 416                            is_broadcast_ether_addr(hdr->addr2)) ?
 417            ieee->host_mc_decrypt : ieee->host_decrypt;
 418
 419        if (can_be_decrypted) {
 420                if (skb->len >= hdrlen + 3) {
 421                        /* Top two-bits of byte 3 are the key index */
 422                        keyidx = skb->data[hdrlen + 3] >> 6;
 423                }
 424
 425                /* ieee->crypt[] is WEP_KEY (4) in length.  Given that keyidx
 426                 * is only allowed 2-bits of storage, no value of keyidx can
 427                 * be provided via above code that would result in keyidx
 428                 * being out of range */
 429                crypt = ieee->crypt_info.crypt[keyidx];
 430
 431#ifdef NOT_YET
 432                sta = NULL;
 433
 434                /* Use station specific key to override default keys if the
 435                 * receiver address is a unicast address ("individual RA"). If
 436                 * bcrx_sta_key parameter is set, station specific key is used
 437                 * even with broad/multicast targets (this is against IEEE
 438                 * 802.11, but makes it easier to use different keys with
 439                 * stations that do not support WEP key mapping). */
 440
 441                if (is_unicast_ether_addr(hdr->addr1) || local->bcrx_sta_key)
 442                        (void)hostap_handle_sta_crypto(local, hdr, &crypt,
 443                                                       &sta);
 444#endif
 445
 446                /* allow NULL decrypt to indicate an station specific override
 447                 * for default encryption */
 448                if (crypt && (crypt->ops == NULL ||
 449                              crypt->ops->decrypt_mpdu == NULL))
 450                        crypt = NULL;
 451
 452                if (!crypt && (fc & IEEE80211_FCTL_PROTECTED)) {
 453                        /* This seems to be triggered by some (multicast?)
 454                         * frames from other than current BSS, so just drop the
 455                         * frames silently instead of filling system log with
 456                         * these reports. */
 457                        LIBIPW_DEBUG_DROP("Decryption failed (not set)"
 458                                             " (SA=%pM)\n", hdr->addr2);
 459                        ieee->ieee_stats.rx_discards_undecryptable++;
 460                        goto rx_dropped;
 461                }
 462        }
 463#ifdef NOT_YET
 464        if (type != WLAN_FC_TYPE_DATA) {
 465                if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_AUTH &&
 466                    fc & IEEE80211_FCTL_PROTECTED && ieee->host_decrypt &&
 467                    (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0) {
 468                        printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
 469                               "from %pM\n", dev->name, hdr->addr2);
 470                        /* TODO: could inform hostapd about this so that it
 471                         * could send auth failure report */
 472                        goto rx_dropped;
 473                }
 474
 475                if (libipw_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
 476                        goto rx_dropped;
 477                else
 478                        goto rx_exit;
 479        }
 480#endif
 481        /* drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.29) */
 482        if (sc == ieee->prev_seq_ctl)
 483                goto rx_dropped;
 484        else
 485                ieee->prev_seq_ctl = sc;
 486
 487        /* Data frame - extract src/dst addresses */
 488        if (skb->len < LIBIPW_3ADDR_LEN)
 489                goto rx_dropped;
 490
 491        switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
 492        case IEEE80211_FCTL_FROMDS:
 493                memcpy(dst, hdr->addr1, ETH_ALEN);
 494                memcpy(src, hdr->addr3, ETH_ALEN);
 495                break;
 496        case IEEE80211_FCTL_TODS:
 497                memcpy(dst, hdr->addr3, ETH_ALEN);
 498                memcpy(src, hdr->addr2, ETH_ALEN);
 499                break;
 500        case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
 501                if (skb->len < LIBIPW_4ADDR_LEN)
 502                        goto rx_dropped;
 503                memcpy(dst, hdr->addr3, ETH_ALEN);
 504                memcpy(src, hdr->addr4, ETH_ALEN);
 505                break;
 506        default:
 507                memcpy(dst, hdr->addr1, ETH_ALEN);
 508                memcpy(src, hdr->addr2, ETH_ALEN);
 509                break;
 510        }
 511
 512#ifdef NOT_YET
 513        if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
 514                goto rx_dropped;
 515        if (wds) {
 516                skb->dev = dev = wds;
 517                stats = hostap_get_stats(dev);
 518        }
 519
 520        if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
 521            (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 522            IEEE80211_FCTL_FROMDS && ieee->stadev &&
 523            ether_addr_equal(hdr->addr2, ieee->assoc_ap_addr)) {
 524                /* Frame from BSSID of the AP for which we are a client */
 525                skb->dev = dev = ieee->stadev;
 526                stats = hostap_get_stats(dev);
 527                from_assoc_ap = 1;
 528        }
 529#endif
 530
 531#ifdef NOT_YET
 532        if ((ieee->iw_mode == IW_MODE_MASTER ||
 533             ieee->iw_mode == IW_MODE_REPEAT) && !from_assoc_ap) {
 534                switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
 535                                             wds != NULL)) {
 536                case AP_RX_CONTINUE_NOT_AUTHORIZED:
 537                        frame_authorized = 0;
 538                        break;
 539                case AP_RX_CONTINUE:
 540                        frame_authorized = 1;
 541                        break;
 542                case AP_RX_DROP:
 543                        goto rx_dropped;
 544                case AP_RX_EXIT:
 545                        goto rx_exit;
 546                }
 547        }
 548#endif
 549
 550        /* Nullfunc frames may have PS-bit set, so they must be passed to
 551         * hostap_handle_sta_rx() before being dropped here. */
 552
 553        stype &= ~IEEE80211_STYPE_QOS_DATA;
 554
 555        if (stype != IEEE80211_STYPE_DATA &&
 556            stype != IEEE80211_STYPE_DATA_CFACK &&
 557            stype != IEEE80211_STYPE_DATA_CFPOLL &&
 558            stype != IEEE80211_STYPE_DATA_CFACKPOLL) {
 559                if (stype != IEEE80211_STYPE_NULLFUNC)
 560                        LIBIPW_DEBUG_DROP("RX: dropped data frame "
 561                                             "with no data (type=0x%02x, "
 562                                             "subtype=0x%02x, len=%d)\n",
 563                                             type, stype, skb->len);
 564                goto rx_dropped;
 565        }
 566
 567        /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
 568
 569        if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 570            (keyidx = libipw_rx_frame_decrypt(ieee, skb, crypt)) < 0)
 571                goto rx_dropped;
 572
 573        hdr = (struct libipw_hdr_4addr *)skb->data;
 574
 575        /* skb: hdr + (possibly fragmented) plaintext payload */
 576        // PR: FIXME: hostap has additional conditions in the "if" below:
 577        // ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
 578        if ((frag != 0) || (fc & IEEE80211_FCTL_MOREFRAGS)) {
 579                int flen;
 580                struct sk_buff *frag_skb = libipw_frag_cache_get(ieee, hdr);
 581                LIBIPW_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
 582
 583                if (!frag_skb) {
 584                        LIBIPW_DEBUG(LIBIPW_DL_RX | LIBIPW_DL_FRAG,
 585                                        "Rx cannot get skb from fragment "
 586                                        "cache (morefrag=%d seq=%u frag=%u)\n",
 587                                        (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
 588                                        WLAN_GET_SEQ_SEQ(sc), frag);
 589                        goto rx_dropped;
 590                }
 591
 592                flen = skb->len;
 593                if (frag != 0)
 594                        flen -= hdrlen;
 595
 596                if (frag_skb->tail + flen > frag_skb->end) {
 597                        printk(KERN_WARNING "%s: host decrypted and "
 598                               "reassembled frame did not fit skb\n",
 599                               dev->name);
 600                        libipw_frag_cache_invalidate(ieee, hdr);
 601                        goto rx_dropped;
 602                }
 603
 604                if (frag == 0) {
 605                        /* copy first fragment (including full headers) into
 606                         * beginning of the fragment cache skb */
 607                        skb_copy_from_linear_data(skb, skb_put(frag_skb, flen), flen);
 608                } else {
 609                        /* append frame payload to the end of the fragment
 610                         * cache skb */
 611                        skb_copy_from_linear_data_offset(skb, hdrlen,
 612                                      skb_put(frag_skb, flen), flen);
 613                }
 614                dev_kfree_skb_any(skb);
 615                skb = NULL;
 616
 617                if (fc & IEEE80211_FCTL_MOREFRAGS) {
 618                        /* more fragments expected - leave the skb in fragment
 619                         * cache for now; it will be delivered to upper layers
 620                         * after all fragments have been received */
 621                        goto rx_exit;
 622                }
 623
 624                /* this was the last fragment and the frame will be
 625                 * delivered, so remove skb from fragment cache */
 626                skb = frag_skb;
 627                hdr = (struct libipw_hdr_4addr *)skb->data;
 628                libipw_frag_cache_invalidate(ieee, hdr);
 629        }
 630
 631        /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
 632         * encrypted/authenticated */
 633        if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 634            libipw_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
 635                goto rx_dropped;
 636
 637        hdr = (struct libipw_hdr_4addr *)skb->data;
 638        if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) {
 639                if (            /*ieee->ieee802_1x && */
 640                           libipw_is_eapol_frame(ieee, skb)) {
 641                        /* pass unencrypted EAPOL frames even if encryption is
 642                         * configured */
 643                } else {
 644                        LIBIPW_DEBUG_DROP("encryption configured, but RX "
 645                                             "frame not encrypted (SA=%pM)\n",
 646                                             hdr->addr2);
 647                        goto rx_dropped;
 648                }
 649        }
 650
 651        if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep &&
 652            !libipw_is_eapol_frame(ieee, skb)) {
 653                LIBIPW_DEBUG_DROP("dropped unencrypted RX data "
 654                                     "frame from %pM (drop_unencrypted=1)\n",
 655                                     hdr->addr2);
 656                goto rx_dropped;
 657        }
 658
 659        /* If the frame was decrypted in hardware, we may need to strip off
 660         * any security data (IV, ICV, etc) that was left behind */
 661        if (!can_be_decrypted && (fc & IEEE80211_FCTL_PROTECTED) &&
 662            ieee->host_strip_iv_icv) {
 663                int trimlen = 0;
 664
 665                /* Top two-bits of byte 3 are the key index */
 666                if (skb->len >= hdrlen + 3)
 667                        keyidx = skb->data[hdrlen + 3] >> 6;
 668
 669                /* To strip off any security data which appears before the
 670                 * payload, we simply increase hdrlen (as the header gets
 671                 * chopped off immediately below). For the security data which
 672                 * appears after the payload, we use skb_trim. */
 673
 674                switch (ieee->sec.encode_alg[keyidx]) {
 675                case SEC_ALG_WEP:
 676                        /* 4 byte IV */
 677                        hdrlen += 4;
 678                        /* 4 byte ICV */
 679                        trimlen = 4;
 680                        break;
 681                case SEC_ALG_TKIP:
 682                        /* 4 byte IV, 4 byte ExtIV */
 683                        hdrlen += 8;
 684                        /* 8 byte MIC, 4 byte ICV */
 685                        trimlen = 12;
 686                        break;
 687                case SEC_ALG_CCMP:
 688                        /* 8 byte CCMP header */
 689                        hdrlen += 8;
 690                        /* 8 byte MIC */
 691                        trimlen = 8;
 692                        break;
 693                }
 694
 695                if (skb->len < trimlen)
 696                        goto rx_dropped;
 697
 698                __skb_trim(skb, skb->len - trimlen);
 699
 700                if (skb->len < hdrlen)
 701                        goto rx_dropped;
 702        }
 703
 704        /* skb: hdr + (possible reassembled) full plaintext payload */
 705
 706        payload = skb->data + hdrlen;
 707        ethertype = (payload[6] << 8) | payload[7];
 708
 709#ifdef NOT_YET
 710        /* If IEEE 802.1X is used, check whether the port is authorized to send
 711         * the received frame. */
 712        if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) {
 713                if (ethertype == ETH_P_PAE) {
 714                        printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n",
 715                               dev->name);
 716                        if (ieee->hostapd && ieee->apdev) {
 717                                /* Send IEEE 802.1X frames to the user
 718                                 * space daemon for processing */
 719                                prism2_rx_80211(ieee->apdev, skb, rx_stats,
 720                                                PRISM2_RX_MGMT);
 721                                ieee->apdevstats.rx_packets++;
 722                                ieee->apdevstats.rx_bytes += skb->len;
 723                                goto rx_exit;
 724                        }
 725                } else if (!frame_authorized) {
 726                        printk(KERN_DEBUG "%s: dropped frame from "
 727                               "unauthorized port (IEEE 802.1X): "
 728                               "ethertype=0x%04x\n", dev->name, ethertype);
 729                        goto rx_dropped;
 730                }
 731        }
 732#endif
 733
 734        /* convert hdr + possible LLC headers into Ethernet header */
 735        if (skb->len - hdrlen >= 8 &&
 736            ((memcmp(payload, libipw_rfc1042_header, SNAP_SIZE) == 0 &&
 737              ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
 738             memcmp(payload, libipw_bridge_tunnel_header, SNAP_SIZE) == 0)) {
 739                /* remove RFC1042 or Bridge-Tunnel encapsulation and
 740                 * replace EtherType */
 741                skb_pull(skb, hdrlen + SNAP_SIZE);
 742                memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 743                memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 744        } else {
 745                __be16 len;
 746                /* Leave Ethernet header part of hdr and full payload */
 747                skb_pull(skb, hdrlen);
 748                len = htons(skb->len);
 749                memcpy(skb_push(skb, 2), &len, 2);
 750                memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 751                memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 752        }
 753
 754#ifdef NOT_YET
 755        if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 756                    IEEE80211_FCTL_TODS) && skb->len >= ETH_HLEN + ETH_ALEN) {
 757                /* Non-standard frame: get addr4 from its bogus location after
 758                 * the payload */
 759                skb_copy_to_linear_data_offset(skb, ETH_ALEN,
 760                                               skb->data + skb->len - ETH_ALEN,
 761                                               ETH_ALEN);
 762                skb_trim(skb, skb->len - ETH_ALEN);
 763        }
 764#endif
 765
 766        dev->stats.rx_packets++;
 767        dev->stats.rx_bytes += skb->len;
 768
 769#ifdef NOT_YET
 770        if (ieee->iw_mode == IW_MODE_MASTER && !wds && ieee->ap->bridge_packets) {
 771                if (is_multicast_ether_addr(dst)) {
 772                        /* copy multicast frame both to the higher layers and
 773                         * to the wireless media */
 774                        ieee->ap->bridged_multicast++;
 775                        skb2 = skb_clone(skb, GFP_ATOMIC);
 776                        if (skb2 == NULL)
 777                                printk(KERN_DEBUG "%s: skb_clone failed for "
 778                                       "multicast frame\n", dev->name);
 779                } else if (hostap_is_sta_assoc(ieee->ap, dst)) {
 780                        /* send frame directly to the associated STA using
 781                         * wireless media and not passing to higher layers */
 782                        ieee->ap->bridged_unicast++;
 783                        skb2 = skb;
 784                        skb = NULL;
 785                }
 786        }
 787
 788        if (skb2 != NULL) {
 789                /* send to wireless media */
 790                skb2->dev = dev;
 791                skb2->protocol = htons(ETH_P_802_3);
 792                skb_reset_mac_header(skb2);
 793                skb_reset_network_header(skb2);
 794                /* skb2->network_header += ETH_HLEN; */
 795                dev_queue_xmit(skb2);
 796        }
 797#endif
 798
 799        if (skb) {
 800                skb->protocol = eth_type_trans(skb, dev);
 801                memset(skb->cb, 0, sizeof(skb->cb));
 802                skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
 803                if (netif_rx(skb) == NET_RX_DROP) {
 804                        /* netif_rx always succeeds, but it might drop
 805                         * the packet.  If it drops the packet, we log that
 806                         * in our stats. */
 807                        LIBIPW_DEBUG_DROP
 808                            ("RX: netif_rx dropped the packet\n");
 809                        dev->stats.rx_dropped++;
 810                }
 811        }
 812
 813      rx_exit:
 814#ifdef NOT_YET
 815        if (sta)
 816                hostap_handle_sta_release(sta);
 817#endif
 818        return 1;
 819
 820      rx_dropped:
 821        dev->stats.rx_dropped++;
 822
 823        /* Returning 0 indicates to caller that we have not handled the SKB--
 824         * so it is still allocated and can be used again by underlying
 825         * hardware as a DMA target */
 826        return 0;
 827}
 828
 829/* Filter out unrelated packets, call libipw_rx[_mgt]
 830 * This function takes over the skb, it should not be used again after calling
 831 * this function. */
 832void libipw_rx_any(struct libipw_device *ieee,
 833                     struct sk_buff *skb, struct libipw_rx_stats *stats)
 834{
 835        struct libipw_hdr_4addr *hdr;
 836        int is_packet_for_us;
 837        u16 fc;
 838
 839        if (ieee->iw_mode == IW_MODE_MONITOR) {
 840                if (!libipw_rx(ieee, skb, stats))
 841                        dev_kfree_skb_irq(skb);
 842                return;
 843        }
 844
 845        if (skb->len < sizeof(struct ieee80211_hdr))
 846                goto drop_free;
 847
 848        hdr = (struct libipw_hdr_4addr *)skb->data;
 849        fc = le16_to_cpu(hdr->frame_ctl);
 850
 851        if ((fc & IEEE80211_FCTL_VERS) != 0)
 852                goto drop_free;
 853
 854        switch (fc & IEEE80211_FCTL_FTYPE) {
 855        case IEEE80211_FTYPE_MGMT:
 856                if (skb->len < sizeof(struct libipw_hdr_3addr))
 857                        goto drop_free;
 858                libipw_rx_mgt(ieee, hdr, stats);
 859                dev_kfree_skb_irq(skb);
 860                return;
 861        case IEEE80211_FTYPE_DATA:
 862                break;
 863        case IEEE80211_FTYPE_CTL:
 864                return;
 865        default:
 866                return;
 867        }
 868
 869        is_packet_for_us = 0;
 870        switch (ieee->iw_mode) {
 871        case IW_MODE_ADHOC:
 872                /* our BSS and not from/to DS */
 873                if (ether_addr_equal(hdr->addr3, ieee->bssid))
 874                if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == 0) {
 875                        /* promisc: get all */
 876                        if (ieee->dev->flags & IFF_PROMISC)
 877                                is_packet_for_us = 1;
 878                        /* to us */
 879                        else if (ether_addr_equal(hdr->addr1, ieee->dev->dev_addr))
 880                                is_packet_for_us = 1;
 881                        /* mcast */
 882                        else if (is_multicast_ether_addr(hdr->addr1))
 883                                is_packet_for_us = 1;
 884                }
 885                break;
 886        case IW_MODE_INFRA:
 887                /* our BSS (== from our AP) and from DS */
 888                if (ether_addr_equal(hdr->addr2, ieee->bssid))
 889                if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS) {
 890                        /* promisc: get all */
 891                        if (ieee->dev->flags & IFF_PROMISC)
 892                                is_packet_for_us = 1;
 893                        /* to us */
 894                        else if (ether_addr_equal(hdr->addr1, ieee->dev->dev_addr))
 895                                is_packet_for_us = 1;
 896                        /* mcast */
 897                        else if (is_multicast_ether_addr(hdr->addr1)) {
 898                                /* not our own packet bcasted from AP */
 899                                if (!ether_addr_equal(hdr->addr3, ieee->dev->dev_addr))
 900                                        is_packet_for_us = 1;
 901                        }
 902                }
 903                break;
 904        default:
 905                /* ? */
 906                break;
 907        }
 908
 909        if (is_packet_for_us)
 910                if (!libipw_rx(ieee, skb, stats))
 911                        dev_kfree_skb_irq(skb);
 912        return;
 913
 914drop_free:
 915        dev_kfree_skb_irq(skb);
 916        ieee->dev->stats.rx_dropped++;
 917}
 918
 919#define MGMT_FRAME_FIXED_PART_LENGTH            0x24
 920
 921static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
 922
 923/*
 924* Make the structure we read from the beacon packet to have
 925* the right values
 926*/
 927static int libipw_verify_qos_info(struct libipw_qos_information_element
 928                                     *info_element, int sub_type)
 929{
 930
 931        if (info_element->qui_subtype != sub_type)
 932                return -1;
 933        if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
 934                return -1;
 935        if (info_element->qui_type != QOS_OUI_TYPE)
 936                return -1;
 937        if (info_element->version != QOS_VERSION_1)
 938                return -1;
 939
 940        return 0;
 941}
 942
 943/*
 944 * Parse a QoS parameter element
 945 */
 946static int libipw_read_qos_param_element(struct libipw_qos_parameter_info
 947                                            *element_param, struct libipw_info_element
 948                                            *info_element)
 949{
 950        int ret = 0;
 951        u16 size = sizeof(struct libipw_qos_parameter_info) - 2;
 952
 953        if ((info_element == NULL) || (element_param == NULL))
 954                return -1;
 955
 956        if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
 957                memcpy(element_param->info_element.qui, info_element->data,
 958                       info_element->len);
 959                element_param->info_element.elementID = info_element->id;
 960                element_param->info_element.length = info_element->len;
 961        } else
 962                ret = -1;
 963        if (ret == 0)
 964                ret = libipw_verify_qos_info(&element_param->info_element,
 965                                                QOS_OUI_PARAM_SUB_TYPE);
 966        return ret;
 967}
 968
 969/*
 970 * Parse a QoS information element
 971 */
 972static int libipw_read_qos_info_element(struct
 973                                           libipw_qos_information_element
 974                                           *element_info, struct libipw_info_element
 975                                           *info_element)
 976{
 977        int ret = 0;
 978        u16 size = sizeof(struct libipw_qos_information_element) - 2;
 979
 980        if (element_info == NULL)
 981                return -1;
 982        if (info_element == NULL)
 983                return -1;
 984
 985        if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
 986                memcpy(element_info->qui, info_element->data,
 987                       info_element->len);
 988                element_info->elementID = info_element->id;
 989                element_info->length = info_element->len;
 990        } else
 991                ret = -1;
 992
 993        if (ret == 0)
 994                ret = libipw_verify_qos_info(element_info,
 995                                                QOS_OUI_INFO_SUB_TYPE);
 996        return ret;
 997}
 998
 999/*
1000 * Write QoS parameters from the ac parameters.
1001 */
1002static int libipw_qos_convert_ac_to_parameters(struct
1003                                                  libipw_qos_parameter_info
1004                                                  *param_elm, struct
1005                                                  libipw_qos_parameters
1006                                                  *qos_param)
1007{
1008        int rc = 0;
1009        int i;
1010        struct libipw_qos_ac_parameter *ac_params;
1011        u32 txop;
1012        u8 cw_min;
1013        u8 cw_max;
1014
1015        for (i = 0; i < QOS_QUEUE_NUM; i++) {
1016                ac_params = &(param_elm->ac_params_record[i]);
1017
1018                qos_param->aifs[i] = (ac_params->aci_aifsn) & 0x0F;
1019                qos_param->aifs[i] -= (qos_param->aifs[i] < 2) ? 0 : 2;
1020
1021                cw_min = ac_params->ecw_min_max & 0x0F;
1022                qos_param->cw_min[i] = cpu_to_le16((1 << cw_min) - 1);
1023
1024                cw_max = (ac_params->ecw_min_max & 0xF0) >> 4;
1025                qos_param->cw_max[i] = cpu_to_le16((1 << cw_max) - 1);
1026
1027                qos_param->flag[i] =
1028                    (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1029
1030                txop = le16_to_cpu(ac_params->tx_op_limit) * 32;
1031                qos_param->tx_op_limit[i] = cpu_to_le16(txop);
1032        }
1033        return rc;
1034}
1035
1036/*
1037 * we have a generic data element which it may contain QoS information or
1038 * parameters element. check the information element length to decide
1039 * which type to read
1040 */
1041static int libipw_parse_qos_info_param_IE(struct libipw_info_element
1042                                             *info_element,
1043                                             struct libipw_network *network)
1044{
1045        int rc = 0;
1046        struct libipw_qos_parameters *qos_param = NULL;
1047        struct libipw_qos_information_element qos_info_element;
1048
1049        rc = libipw_read_qos_info_element(&qos_info_element, info_element);
1050
1051        if (rc == 0) {
1052                network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1053                network->flags |= NETWORK_HAS_QOS_INFORMATION;
1054        } else {
1055                struct libipw_qos_parameter_info param_element;
1056
1057                rc = libipw_read_qos_param_element(&param_element,
1058                                                      info_element);
1059                if (rc == 0) {
1060                        qos_param = &(network->qos_data.parameters);
1061                        libipw_qos_convert_ac_to_parameters(&param_element,
1062                                                               qos_param);
1063                        network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1064                        network->qos_data.param_count =
1065                            param_element.info_element.ac_info & 0x0F;
1066                }
1067        }
1068
1069        if (rc == 0) {
1070                LIBIPW_DEBUG_QOS("QoS is supported\n");
1071                network->qos_data.supported = 1;
1072        }
1073        return rc;
1074}
1075
1076#ifdef CONFIG_LIBIPW_DEBUG
1077#define MFIE_STRING(x) case WLAN_EID_ ##x: return #x
1078
1079static const char *get_info_element_string(u16 id)
1080{
1081        switch (id) {
1082                MFIE_STRING(SSID);
1083                MFIE_STRING(SUPP_RATES);
1084                MFIE_STRING(FH_PARAMS);
1085                MFIE_STRING(DS_PARAMS);
1086                MFIE_STRING(CF_PARAMS);
1087                MFIE_STRING(TIM);
1088                MFIE_STRING(IBSS_PARAMS);
1089                MFIE_STRING(COUNTRY);
1090                MFIE_STRING(REQUEST);
1091                MFIE_STRING(CHALLENGE);
1092                MFIE_STRING(PWR_CONSTRAINT);
1093                MFIE_STRING(PWR_CAPABILITY);
1094                MFIE_STRING(TPC_REQUEST);
1095                MFIE_STRING(TPC_REPORT);
1096                MFIE_STRING(SUPPORTED_CHANNELS);
1097                MFIE_STRING(CHANNEL_SWITCH);
1098                MFIE_STRING(MEASURE_REQUEST);
1099                MFIE_STRING(MEASURE_REPORT);
1100                MFIE_STRING(QUIET);
1101                MFIE_STRING(IBSS_DFS);
1102                MFIE_STRING(ERP_INFO);
1103                MFIE_STRING(RSN);
1104                MFIE_STRING(EXT_SUPP_RATES);
1105                MFIE_STRING(VENDOR_SPECIFIC);
1106                MFIE_STRING(QOS_PARAMETER);
1107        default:
1108                return "UNKNOWN";
1109        }
1110}
1111#endif
1112
1113static int libipw_parse_info_param(struct libipw_info_element
1114                                      *info_element, u16 length,
1115                                      struct libipw_network *network)
1116{
1117        u8 i;
1118#ifdef CONFIG_LIBIPW_DEBUG
1119        char rates_str[64];
1120        char *p;
1121#endif
1122
1123        while (length >= sizeof(*info_element)) {
1124                if (sizeof(*info_element) + info_element->len > length) {
1125                        LIBIPW_DEBUG_MGMT("Info elem: parse failed: "
1126                                             "info_element->len + 2 > left : "
1127                                             "info_element->len+2=%zd left=%d, id=%d.\n",
1128                                             info_element->len +
1129                                             sizeof(*info_element),
1130                                             length, info_element->id);
1131                        /* We stop processing but don't return an error here
1132                         * because some misbehaviour APs break this rule. ie.
1133                         * Orinoco AP1000. */
1134                        break;
1135                }
1136
1137                switch (info_element->id) {
1138                case WLAN_EID_SSID:
1139                        network->ssid_len = min(info_element->len,
1140                                                (u8) IW_ESSID_MAX_SIZE);
1141                        memcpy(network->ssid, info_element->data,
1142                               network->ssid_len);
1143                        if (network->ssid_len < IW_ESSID_MAX_SIZE)
1144                                memset(network->ssid + network->ssid_len, 0,
1145                                       IW_ESSID_MAX_SIZE - network->ssid_len);
1146
1147                        LIBIPW_DEBUG_MGMT("WLAN_EID_SSID: '%*pE' len=%d.\n",
1148                                          network->ssid_len, network->ssid,
1149                                          network->ssid_len);
1150                        break;
1151
1152                case WLAN_EID_SUPP_RATES:
1153#ifdef CONFIG_LIBIPW_DEBUG
1154                        p = rates_str;
1155#endif
1156                        network->rates_len = min(info_element->len,
1157                                                 MAX_RATES_LENGTH);
1158                        for (i = 0; i < network->rates_len; i++) {
1159                                network->rates[i] = info_element->data[i];
1160#ifdef CONFIG_LIBIPW_DEBUG
1161                                p += snprintf(p, sizeof(rates_str) -
1162                                              (p - rates_str), "%02X ",
1163                                              network->rates[i]);
1164#endif
1165                                if (libipw_is_ofdm_rate
1166                                    (info_element->data[i])) {
1167                                        network->flags |= NETWORK_HAS_OFDM;
1168                                        if (info_element->data[i] &
1169                                            LIBIPW_BASIC_RATE_MASK)
1170                                                network->flags &=
1171                                                    ~NETWORK_HAS_CCK;
1172                                }
1173                        }
1174
1175                        LIBIPW_DEBUG_MGMT("WLAN_EID_SUPP_RATES: '%s' (%d)\n",
1176                                             rates_str, network->rates_len);
1177                        break;
1178
1179                case WLAN_EID_EXT_SUPP_RATES:
1180#ifdef CONFIG_LIBIPW_DEBUG
1181                        p = rates_str;
1182#endif
1183                        network->rates_ex_len = min(info_element->len,
1184                                                    MAX_RATES_EX_LENGTH);
1185                        for (i = 0; i < network->rates_ex_len; i++) {
1186                                network->rates_ex[i] = info_element->data[i];
1187#ifdef CONFIG_LIBIPW_DEBUG
1188                                p += snprintf(p, sizeof(rates_str) -
1189                                              (p - rates_str), "%02X ",
1190                                              network->rates_ex[i]);
1191#endif
1192                                if (libipw_is_ofdm_rate
1193                                    (info_element->data[i])) {
1194                                        network->flags |= NETWORK_HAS_OFDM;
1195                                        if (info_element->data[i] &
1196                                            LIBIPW_BASIC_RATE_MASK)
1197                                                network->flags &=
1198                                                    ~NETWORK_HAS_CCK;
1199                                }
1200                        }
1201
1202                        LIBIPW_DEBUG_MGMT("WLAN_EID_EXT_SUPP_RATES: '%s' (%d)\n",
1203                                             rates_str, network->rates_ex_len);
1204                        break;
1205
1206                case WLAN_EID_DS_PARAMS:
1207                        LIBIPW_DEBUG_MGMT("WLAN_EID_DS_PARAMS: %d\n",
1208                                             info_element->data[0]);
1209                        network->channel = info_element->data[0];
1210                        break;
1211
1212                case WLAN_EID_FH_PARAMS:
1213                        LIBIPW_DEBUG_MGMT("WLAN_EID_FH_PARAMS: ignored\n");
1214                        break;
1215
1216                case WLAN_EID_CF_PARAMS:
1217                        LIBIPW_DEBUG_MGMT("WLAN_EID_CF_PARAMS: ignored\n");
1218                        break;
1219
1220                case WLAN_EID_TIM:
1221                        network->tim.tim_count = info_element->data[0];
1222                        network->tim.tim_period = info_element->data[1];
1223                        LIBIPW_DEBUG_MGMT("WLAN_EID_TIM: partially ignored\n");
1224                        break;
1225
1226                case WLAN_EID_ERP_INFO:
1227                        network->erp_value = info_element->data[0];
1228                        network->flags |= NETWORK_HAS_ERP_VALUE;
1229                        LIBIPW_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1230                                             network->erp_value);
1231                        break;
1232
1233                case WLAN_EID_IBSS_PARAMS:
1234                        network->atim_window = info_element->data[0];
1235                        LIBIPW_DEBUG_MGMT("WLAN_EID_IBSS_PARAMS: %d\n",
1236                                             network->atim_window);
1237                        break;
1238
1239                case WLAN_EID_CHALLENGE:
1240                        LIBIPW_DEBUG_MGMT("WLAN_EID_CHALLENGE: ignored\n");
1241                        break;
1242
1243                case WLAN_EID_VENDOR_SPECIFIC:
1244                        LIBIPW_DEBUG_MGMT("WLAN_EID_VENDOR_SPECIFIC: %d bytes\n",
1245                                             info_element->len);
1246                        if (!libipw_parse_qos_info_param_IE(info_element,
1247                                                               network))
1248                                break;
1249
1250                        if (info_element->len >= 4 &&
1251                            info_element->data[0] == 0x00 &&
1252                            info_element->data[1] == 0x50 &&
1253                            info_element->data[2] == 0xf2 &&
1254                            info_element->data[3] == 0x01) {
1255                                network->wpa_ie_len = min(info_element->len + 2,
1256                                                          MAX_WPA_IE_LEN);
1257                                memcpy(network->wpa_ie, info_element,
1258                                       network->wpa_ie_len);
1259                        }
1260                        break;
1261
1262                case WLAN_EID_RSN:
1263                        LIBIPW_DEBUG_MGMT("WLAN_EID_RSN: %d bytes\n",
1264                                             info_element->len);
1265                        network->rsn_ie_len = min(info_element->len + 2,
1266                                                  MAX_WPA_IE_LEN);
1267                        memcpy(network->rsn_ie, info_element,
1268                               network->rsn_ie_len);
1269                        break;
1270
1271                case WLAN_EID_QOS_PARAMETER:
1272                        printk(KERN_ERR
1273                               "QoS Error need to parse QOS_PARAMETER IE\n");
1274                        break;
1275                        /* 802.11h */
1276                case WLAN_EID_PWR_CONSTRAINT:
1277                        network->power_constraint = info_element->data[0];
1278                        network->flags |= NETWORK_HAS_POWER_CONSTRAINT;
1279                        break;
1280
1281                case WLAN_EID_CHANNEL_SWITCH:
1282                        network->power_constraint = info_element->data[0];
1283                        network->flags |= NETWORK_HAS_CSA;
1284                        break;
1285
1286                case WLAN_EID_QUIET:
1287                        network->quiet.count = info_element->data[0];
1288                        network->quiet.period = info_element->data[1];
1289                        network->quiet.duration = info_element->data[2];
1290                        network->quiet.offset = info_element->data[3];
1291                        network->flags |= NETWORK_HAS_QUIET;
1292                        break;
1293
1294                case WLAN_EID_IBSS_DFS:
1295                        network->flags |= NETWORK_HAS_IBSS_DFS;
1296                        break;
1297
1298                case WLAN_EID_TPC_REPORT:
1299                        network->tpc_report.transmit_power =
1300                            info_element->data[0];
1301                        network->tpc_report.link_margin = info_element->data[1];
1302                        network->flags |= NETWORK_HAS_TPC_REPORT;
1303                        break;
1304
1305                default:
1306                        LIBIPW_DEBUG_MGMT
1307                            ("Unsupported info element: %s (%d)\n",
1308                             get_info_element_string(info_element->id),
1309                             info_element->id);
1310                        break;
1311                }
1312
1313                length -= sizeof(*info_element) + info_element->len;
1314                info_element =
1315                    (struct libipw_info_element *)&info_element->
1316                    data[info_element->len];
1317        }
1318
1319        return 0;
1320}
1321
1322static int libipw_handle_assoc_resp(struct libipw_device *ieee, struct libipw_assoc_response
1323                                       *frame, struct libipw_rx_stats *stats)
1324{
1325        struct libipw_network network_resp = { };
1326        struct libipw_network *network = &network_resp;
1327        struct net_device *dev = ieee->dev;
1328
1329        network->flags = 0;
1330        network->qos_data.active = 0;
1331        network->qos_data.supported = 0;
1332        network->qos_data.param_count = 0;
1333        network->qos_data.old_param_count = 0;
1334
1335        //network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF);
1336        network->atim_window = le16_to_cpu(frame->aid);
1337        network->listen_interval = le16_to_cpu(frame->status);
1338        memcpy(network->bssid, frame->header.addr3, ETH_ALEN);
1339        network->capability = le16_to_cpu(frame->capability);
1340        network->last_scanned = jiffies;
1341        network->rates_len = network->rates_ex_len = 0;
1342        network->last_associate = 0;
1343        network->ssid_len = 0;
1344        network->erp_value =
1345            (network->capability & WLAN_CAPABILITY_IBSS) ? 0x3 : 0x0;
1346
1347        if (stats->freq == LIBIPW_52GHZ_BAND) {
1348                /* for A band (No DS info) */
1349                network->channel = stats->received_channel;
1350        } else
1351                network->flags |= NETWORK_HAS_CCK;
1352
1353        network->wpa_ie_len = 0;
1354        network->rsn_ie_len = 0;
1355
1356        if (libipw_parse_info_param
1357            (frame->info_element, stats->len - sizeof(*frame), network))
1358                return 1;
1359
1360        network->mode = 0;
1361        if (stats->freq == LIBIPW_52GHZ_BAND)
1362                network->mode = IEEE_A;
1363        else {
1364                if (network->flags & NETWORK_HAS_OFDM)
1365                        network->mode |= IEEE_G;
1366                if (network->flags & NETWORK_HAS_CCK)
1367                        network->mode |= IEEE_B;
1368        }
1369
1370        memcpy(&network->stats, stats, sizeof(network->stats));
1371
1372        if (ieee->handle_assoc_response != NULL)
1373                ieee->handle_assoc_response(dev, frame, network);
1374
1375        return 0;
1376}
1377
1378/***************************************************/
1379
1380static int libipw_network_init(struct libipw_device *ieee, struct libipw_probe_response
1381                                         *beacon,
1382                                         struct libipw_network *network,
1383                                         struct libipw_rx_stats *stats)
1384{
1385        network->qos_data.active = 0;
1386        network->qos_data.supported = 0;
1387        network->qos_data.param_count = 0;
1388        network->qos_data.old_param_count = 0;
1389
1390        /* Pull out fixed field data */
1391        memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
1392        network->capability = le16_to_cpu(beacon->capability);
1393        network->last_scanned = jiffies;
1394        network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
1395        network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
1396        network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
1397        /* Where to pull this? beacon->listen_interval; */
1398        network->listen_interval = 0x0A;
1399        network->rates_len = network->rates_ex_len = 0;
1400        network->last_associate = 0;
1401        network->ssid_len = 0;
1402        network->flags = 0;
1403        network->atim_window = 0;
1404        network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
1405            0x3 : 0x0;
1406
1407        if (stats->freq == LIBIPW_52GHZ_BAND) {
1408                /* for A band (No DS info) */
1409                network->channel = stats->received_channel;
1410        } else
1411                network->flags |= NETWORK_HAS_CCK;
1412
1413        network->wpa_ie_len = 0;
1414        network->rsn_ie_len = 0;
1415
1416        if (libipw_parse_info_param
1417            (beacon->info_element, stats->len - sizeof(*beacon), network))
1418                return 1;
1419
1420        network->mode = 0;
1421        if (stats->freq == LIBIPW_52GHZ_BAND)
1422                network->mode = IEEE_A;
1423        else {
1424                if (network->flags & NETWORK_HAS_OFDM)
1425                        network->mode |= IEEE_G;
1426                if (network->flags & NETWORK_HAS_CCK)
1427                        network->mode |= IEEE_B;
1428        }
1429
1430        if (network->mode == 0) {
1431                LIBIPW_DEBUG_SCAN("Filtered out '%*pE (%pM)' network.\n",
1432                                  network->ssid_len, network->ssid,
1433                                  network->bssid);
1434                return 1;
1435        }
1436
1437        memcpy(&network->stats, stats, sizeof(network->stats));
1438
1439        return 0;
1440}
1441
1442static inline int is_same_network(struct libipw_network *src,
1443                                  struct libipw_network *dst)
1444{
1445        /* A network is only a duplicate if the channel, BSSID, and ESSID
1446         * all match.  We treat all <hidden> with the same BSSID and channel
1447         * as one network */
1448        return ((src->ssid_len == dst->ssid_len) &&
1449                (src->channel == dst->channel) &&
1450                ether_addr_equal_64bits(src->bssid, dst->bssid) &&
1451                !memcmp(src->ssid, dst->ssid, src->ssid_len));
1452}
1453
1454static void update_network(struct libipw_network *dst,
1455                                  struct libipw_network *src)
1456{
1457        int qos_active;
1458        u8 old_param;
1459
1460        /* We only update the statistics if they were created by receiving
1461         * the network information on the actual channel the network is on.
1462         *
1463         * This keeps beacons received on neighbor channels from bringing
1464         * down the signal level of an AP. */
1465        if (dst->channel == src->stats.received_channel)
1466                memcpy(&dst->stats, &src->stats,
1467                       sizeof(struct libipw_rx_stats));
1468        else
1469                LIBIPW_DEBUG_SCAN("Network %pM info received "
1470                        "off channel (%d vs. %d)\n", src->bssid,
1471                        dst->channel, src->stats.received_channel);
1472
1473        dst->capability = src->capability;
1474        memcpy(dst->rates, src->rates, src->rates_len);
1475        dst->rates_len = src->rates_len;
1476        memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
1477        dst->rates_ex_len = src->rates_ex_len;
1478
1479        dst->mode = src->mode;
1480        dst->flags = src->flags;
1481        dst->time_stamp[0] = src->time_stamp[0];
1482        dst->time_stamp[1] = src->time_stamp[1];
1483
1484        dst->beacon_interval = src->beacon_interval;
1485        dst->listen_interval = src->listen_interval;
1486        dst->atim_window = src->atim_window;
1487        dst->erp_value = src->erp_value;
1488        dst->tim = src->tim;
1489
1490        memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
1491        dst->wpa_ie_len = src->wpa_ie_len;
1492        memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
1493        dst->rsn_ie_len = src->rsn_ie_len;
1494
1495        dst->last_scanned = jiffies;
1496        qos_active = src->qos_data.active;
1497        old_param = dst->qos_data.old_param_count;
1498        if (dst->flags & NETWORK_HAS_QOS_MASK)
1499                memcpy(&dst->qos_data, &src->qos_data,
1500                       sizeof(struct libipw_qos_data));
1501        else {
1502                dst->qos_data.supported = src->qos_data.supported;
1503                dst->qos_data.param_count = src->qos_data.param_count;
1504        }
1505
1506        if (dst->qos_data.supported == 1) {
1507                if (dst->ssid_len)
1508                        LIBIPW_DEBUG_QOS
1509                            ("QoS the network %s is QoS supported\n",
1510                             dst->ssid);
1511                else
1512                        LIBIPW_DEBUG_QOS
1513                            ("QoS the network is QoS supported\n");
1514        }
1515        dst->qos_data.active = qos_active;
1516        dst->qos_data.old_param_count = old_param;
1517
1518        /* dst->last_associate is not overwritten */
1519}
1520
1521static inline int is_beacon(__le16 fc)
1522{
1523        return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
1524}
1525
1526static void libipw_process_probe_response(struct libipw_device
1527                                                    *ieee, struct
1528                                                    libipw_probe_response
1529                                                    *beacon, struct libipw_rx_stats
1530                                                    *stats)
1531{
1532        struct net_device *dev = ieee->dev;
1533        struct libipw_network network = { };
1534        struct libipw_network *target;
1535        struct libipw_network *oldest = NULL;
1536#ifdef CONFIG_LIBIPW_DEBUG
1537        struct libipw_info_element *info_element = beacon->info_element;
1538#endif
1539        unsigned long flags;
1540
1541        LIBIPW_DEBUG_SCAN("'%*pE' (%pM): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1542                     info_element->len, info_element->data,
1543                     beacon->header.addr3,
1544                     (beacon->capability & cpu_to_le16(1 << 0xf)) ? '1' : '0',
1545                     (beacon->capability & cpu_to_le16(1 << 0xe)) ? '1' : '0',
1546                     (beacon->capability & cpu_to_le16(1 << 0xd)) ? '1' : '0',
1547                     (beacon->capability & cpu_to_le16(1 << 0xc)) ? '1' : '0',
1548                     (beacon->capability & cpu_to_le16(1 << 0xb)) ? '1' : '0',
1549                     (beacon->capability & cpu_to_le16(1 << 0xa)) ? '1' : '0',
1550                     (beacon->capability & cpu_to_le16(1 << 0x9)) ? '1' : '0',
1551                     (beacon->capability & cpu_to_le16(1 << 0x8)) ? '1' : '0',
1552                     (beacon->capability & cpu_to_le16(1 << 0x7)) ? '1' : '0',
1553                     (beacon->capability & cpu_to_le16(1 << 0x6)) ? '1' : '0',
1554                     (beacon->capability & cpu_to_le16(1 << 0x5)) ? '1' : '0',
1555                     (beacon->capability & cpu_to_le16(1 << 0x4)) ? '1' : '0',
1556                     (beacon->capability & cpu_to_le16(1 << 0x3)) ? '1' : '0',
1557                     (beacon->capability & cpu_to_le16(1 << 0x2)) ? '1' : '0',
1558                     (beacon->capability & cpu_to_le16(1 << 0x1)) ? '1' : '0',
1559                     (beacon->capability & cpu_to_le16(1 << 0x0)) ? '1' : '0');
1560
1561        if (libipw_network_init(ieee, beacon, &network, stats)) {
1562                LIBIPW_DEBUG_SCAN("Dropped '%*pE' (%pM) via %s.\n",
1563                                  info_element->len, info_element->data,
1564                                  beacon->header.addr3,
1565                                  is_beacon(beacon->header.frame_ctl) ?
1566                                  "BEACON" : "PROBE RESPONSE");
1567                return;
1568        }
1569
1570        /* The network parsed correctly -- so now we scan our known networks
1571         * to see if we can find it in our list.
1572         *
1573         * NOTE:  This search is definitely not optimized.  Once its doing
1574         *        the "right thing" we'll optimize it for efficiency if
1575         *        necessary */
1576
1577        /* Search for this entry in the list and update it if it is
1578         * already there. */
1579
1580        spin_lock_irqsave(&ieee->lock, flags);
1581
1582        list_for_each_entry(target, &ieee->network_list, list) {
1583                if (is_same_network(target, &network))
1584                        break;
1585
1586                if ((oldest == NULL) ||
1587                    time_before(target->last_scanned, oldest->last_scanned))
1588                        oldest = target;
1589        }
1590
1591        /* If we didn't find a match, then get a new network slot to initialize
1592         * with this beacon's information */
1593        if (&target->list == &ieee->network_list) {
1594                if (list_empty(&ieee->network_free_list)) {
1595                        /* If there are no more slots, expire the oldest */
1596                        list_del(&oldest->list);
1597                        target = oldest;
1598                        LIBIPW_DEBUG_SCAN("Expired '%*pE' (%pM) from network list.\n",
1599                                          target->ssid_len, target->ssid,
1600                                          target->bssid);
1601                } else {
1602                        /* Otherwise just pull from the free list */
1603                        target = list_entry(ieee->network_free_list.next,
1604                                            struct libipw_network, list);
1605                        list_del(ieee->network_free_list.next);
1606                }
1607
1608#ifdef CONFIG_LIBIPW_DEBUG
1609                LIBIPW_DEBUG_SCAN("Adding '%*pE' (%pM) via %s.\n",
1610                                  network.ssid_len, network.ssid,
1611                                  network.bssid,
1612                                  is_beacon(beacon->header.frame_ctl) ?
1613                                  "BEACON" : "PROBE RESPONSE");
1614#endif
1615                memcpy(target, &network, sizeof(*target));
1616                list_add_tail(&target->list, &ieee->network_list);
1617        } else {
1618                LIBIPW_DEBUG_SCAN("Updating '%*pE' (%pM) via %s.\n",
1619                                  target->ssid_len, target->ssid,
1620                                  target->bssid,
1621                                  is_beacon(beacon->header.frame_ctl) ?
1622                                  "BEACON" : "PROBE RESPONSE");
1623                update_network(target, &network);
1624        }
1625
1626        spin_unlock_irqrestore(&ieee->lock, flags);
1627
1628        if (is_beacon(beacon->header.frame_ctl)) {
1629                if (ieee->handle_beacon != NULL)
1630                        ieee->handle_beacon(dev, beacon, target);
1631        } else {
1632                if (ieee->handle_probe_response != NULL)
1633                        ieee->handle_probe_response(dev, beacon, target);
1634        }
1635}
1636
1637void libipw_rx_mgt(struct libipw_device *ieee,
1638                      struct libipw_hdr_4addr *header,
1639                      struct libipw_rx_stats *stats)
1640{
1641        switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
1642        case IEEE80211_STYPE_ASSOC_RESP:
1643                LIBIPW_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
1644                                     WLAN_FC_GET_STYPE(le16_to_cpu
1645                                                       (header->frame_ctl)));
1646                libipw_handle_assoc_resp(ieee,
1647                                            (struct libipw_assoc_response *)
1648                                            header, stats);
1649                break;
1650
1651        case IEEE80211_STYPE_REASSOC_RESP:
1652                LIBIPW_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
1653                                     WLAN_FC_GET_STYPE(le16_to_cpu
1654                                                       (header->frame_ctl)));
1655                break;
1656
1657        case IEEE80211_STYPE_PROBE_REQ:
1658                LIBIPW_DEBUG_MGMT("received auth (%d)\n",
1659                                     WLAN_FC_GET_STYPE(le16_to_cpu
1660                                                       (header->frame_ctl)));
1661
1662                if (ieee->handle_probe_request != NULL)
1663                        ieee->handle_probe_request(ieee->dev,
1664                                                   (struct
1665                                                    libipw_probe_request *)
1666                                                   header, stats);
1667                break;
1668
1669        case IEEE80211_STYPE_PROBE_RESP:
1670                LIBIPW_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1671                                     WLAN_FC_GET_STYPE(le16_to_cpu
1672                                                       (header->frame_ctl)));
1673                LIBIPW_DEBUG_SCAN("Probe response\n");
1674                libipw_process_probe_response(ieee,
1675                                                 (struct
1676                                                  libipw_probe_response *)
1677                                                 header, stats);
1678                break;
1679
1680        case IEEE80211_STYPE_BEACON:
1681                LIBIPW_DEBUG_MGMT("received BEACON (%d)\n",
1682                                     WLAN_FC_GET_STYPE(le16_to_cpu
1683                                                       (header->frame_ctl)));
1684                LIBIPW_DEBUG_SCAN("Beacon\n");
1685                libipw_process_probe_response(ieee,
1686                                                 (struct
1687                                                  libipw_probe_response *)
1688                                                 header, stats);
1689                break;
1690        case IEEE80211_STYPE_AUTH:
1691
1692                LIBIPW_DEBUG_MGMT("received auth (%d)\n",
1693                                     WLAN_FC_GET_STYPE(le16_to_cpu
1694                                                       (header->frame_ctl)));
1695
1696                if (ieee->handle_auth != NULL)
1697                        ieee->handle_auth(ieee->dev,
1698                                          (struct libipw_auth *)header);
1699                break;
1700
1701        case IEEE80211_STYPE_DISASSOC:
1702                if (ieee->handle_disassoc != NULL)
1703                        ieee->handle_disassoc(ieee->dev,
1704                                              (struct libipw_disassoc *)
1705                                              header);
1706                break;
1707
1708        case IEEE80211_STYPE_ACTION:
1709                LIBIPW_DEBUG_MGMT("ACTION\n");
1710                if (ieee->handle_action)
1711                        ieee->handle_action(ieee->dev,
1712                                            (struct libipw_action *)
1713                                            header, stats);
1714                break;
1715
1716        case IEEE80211_STYPE_REASSOC_REQ:
1717                LIBIPW_DEBUG_MGMT("received reassoc (%d)\n",
1718                                     WLAN_FC_GET_STYPE(le16_to_cpu
1719                                                       (header->frame_ctl)));
1720
1721                LIBIPW_DEBUG_MGMT("%s: LIBIPW_REASSOC_REQ received\n",
1722                                     ieee->dev->name);
1723                if (ieee->handle_reassoc_request != NULL)
1724                        ieee->handle_reassoc_request(ieee->dev,
1725                                                    (struct libipw_reassoc_request *)
1726                                                     header);
1727                break;
1728
1729        case IEEE80211_STYPE_ASSOC_REQ:
1730                LIBIPW_DEBUG_MGMT("received assoc (%d)\n",
1731                                     WLAN_FC_GET_STYPE(le16_to_cpu
1732                                                       (header->frame_ctl)));
1733
1734                LIBIPW_DEBUG_MGMT("%s: LIBIPW_ASSOC_REQ received\n",
1735                                     ieee->dev->name);
1736                if (ieee->handle_assoc_request != NULL)
1737                        ieee->handle_assoc_request(ieee->dev);
1738                break;
1739
1740        case IEEE80211_STYPE_DEAUTH:
1741                LIBIPW_DEBUG_MGMT("DEAUTH\n");
1742                if (ieee->handle_deauth != NULL)
1743                        ieee->handle_deauth(ieee->dev,
1744                                            (struct libipw_deauth *)
1745                                            header);
1746                break;
1747        default:
1748                LIBIPW_DEBUG_MGMT("received UNKNOWN (%d)\n",
1749                                     WLAN_FC_GET_STYPE(le16_to_cpu
1750                                                       (header->frame_ctl)));
1751                LIBIPW_DEBUG_MGMT("%s: Unknown management packet: %d\n",
1752                                     ieee->dev->name,
1753                                     WLAN_FC_GET_STYPE(le16_to_cpu
1754                                                       (header->frame_ctl)));
1755                break;
1756        }
1757}
1758
1759EXPORT_SYMBOL_GPL(libipw_rx_any);
1760EXPORT_SYMBOL(libipw_rx_mgt);
1761EXPORT_SYMBOL(libipw_rx);
1762