drivers/staging/rtl8192e/rtllib_rx.c

   1 /*
   2  * Original code based Host AP (software wireless LAN access point) driver
   3  * for Intersil Prism2/2.5/3 - hostap.o module, common routines
   4  *
   5  * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   6  * <jkmaline@cc.hut.fi>
   7  * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
   8  * Copyright (c) 2004, 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   Few modifications for Realtek's Wi-Fi drivers by
  17   Andrea Merello <andrea.merello@gmail.com>
  18
  19   A special thanks goes to Realtek for their support !
  20
  21 ******************************************************************************/
  22
  23
  24 #include <linux/compiler.h>
  25 #include <linux/errno.h>
  26 #include <linux/if_arp.h>
  27 #include <linux/in6.h>
  28 #include <linux/in.h>
  29 #include <linux/ip.h>
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/netdevice.h>
  33 #include <linux/pci.h>
  34 #include <linux/proc_fs.h>
  35 #include <linux/skbuff.h>
  36 #include <linux/slab.h>
  37 #include <linux/tcp.h>
  38 #include <linux/types.h>
  39 #include <linux/wireless.h>
  40 #include <linux/etherdevice.h>
  41 #include <linux/uaccess.h>
  42 #include <linux/ctype.h>
  43
  44 #include "rtllib.h"
  45 #include "dot11d.h"
  46
  47 static inline void rtllib_monitor_rx(struct rtllib_device *ieee,
  48                                 struct sk_buff *skb, struct rtllib_rx_stats *rx_status,
  49                                 size_t hdr_length)
  50 {
  51         skb->dev = ieee->dev;
  52         skb_reset_mac_header(skb);
  53         skb_pull(skb, hdr_length);
  54         skb->pkt_type = PACKET_OTHERHOST;
  55         skb->protocol = htons(ETH_P_80211_RAW);
  56         memset(skb->cb, 0, sizeof(skb->cb));
  57         netif_rx(skb);
  58 }
  59
  60 /* Called only as a tasklet (software IRQ) */
  61 static struct rtllib_frag_entry *
  62 rtllib_frag_cache_find(struct rtllib_device *ieee, unsigned int seq,
  63                           unsigned int frag, u8 tid, u8 *src, u8 *dst)
  64 {
  65         struct rtllib_frag_entry *entry;
  66         int i;
  67
  68         for (i = 0; i < RTLLIB_FRAG_CACHE_LEN; i++) {
  69                 entry = &ieee->frag_cache[tid][i];
  70                 if (entry->skb != NULL &&
  71                     time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
  72                         RTLLIB_DEBUG_FRAG(
  73                                 "expiring fragment cache entry "
  74                                 "seq=%u last_frag=%u\n",
  75                                 entry->seq, entry->last_frag);
  76                         dev_kfree_skb_any(entry->skb);
  77                         entry->skb = NULL;
  78                 }
  79
  80                 if (entry->skb != NULL && entry->seq == seq &&
  81                     (entry->last_frag + 1 == frag || frag == -1) &&
  82                     memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
  83                     memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
  84                         return entry;
  85         }
  86
  87         return NULL;
  88 }
  89
  90 /* Called only as a tasklet (software IRQ) */
  91 static struct sk_buff *
  92 rtllib_frag_cache_get(struct rtllib_device *ieee,
  93                          struct rtllib_hdr_4addr *hdr)
  94 {
  95         struct sk_buff *skb = NULL;
  96         u16 fc = le16_to_cpu(hdr->frame_ctl);
  97         u16 sc = le16_to_cpu(hdr->seq_ctl);
  98         unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
  99         unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
 100         struct rtllib_frag_entry *entry;
 101         struct rtllib_hdr_3addrqos *hdr_3addrqos;
 102         struct rtllib_hdr_4addrqos *hdr_4addrqos;
 103         u8 tid;
 104
 105         if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) && RTLLIB_QOS_HAS_SEQ(fc)) {
 106                 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
 107                 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 108                 tid = UP2AC(tid);
 109                 tid++;
 110         } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
 111                 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
 112                 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 113                 tid = UP2AC(tid);
 114                 tid++;
 115         } else {
 116                 tid = 0;
 117         }
 118
 119         if (frag == 0) {
 120                 /* Reserve enough space to fit maximum frame length */
 121                 skb = dev_alloc_skb(ieee->dev->mtu +
 122                                     sizeof(struct rtllib_hdr_4addr) +
 123                                     8 /* LLC */ +
 124                                     2 /* alignment */ +
 125                                     8 /* WEP */ +
 126                                     ETH_ALEN /* WDS */ +
 127                                     (RTLLIB_QOS_HAS_SEQ(fc) ? 2 : 0) /* QOS Control */);
 128                 if (skb == NULL)
 129                         return NULL;
 130
 131                 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
 132                 ieee->frag_next_idx[tid]++;
 133                 if (ieee->frag_next_idx[tid] >= RTLLIB_FRAG_CACHE_LEN)
 134                         ieee->frag_next_idx[tid] = 0;
 135
 136                 if (entry->skb != NULL)
 137                         dev_kfree_skb_any(entry->skb);
 138
 139                 entry->first_frag_time = jiffies;
 140                 entry->seq = seq;
 141                 entry->last_frag = frag;
 142                 entry->skb = skb;
 143                 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
 144                 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
 145         } else {
 146                 /* received a fragment of a frame for which the head fragment
 147                  * should have already been received */
 148                 entry = rtllib_frag_cache_find(ieee, seq, frag, tid, hdr->addr2,
 149                                                   hdr->addr1);
 150                 if (entry != NULL) {
 151                         entry->last_frag = frag;
 152                         skb = entry->skb;
 153                 }
 154         }
 155
 156         return skb;
 157 }
 158
 159
 160 /* Called only as a tasklet (software IRQ) */
 161 static int rtllib_frag_cache_invalidate(struct rtllib_device *ieee,
 162                                            struct rtllib_hdr_4addr *hdr)
 163 {
 164         u16 fc = le16_to_cpu(hdr->frame_ctl);
 165         u16 sc = le16_to_cpu(hdr->seq_ctl);
 166         unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
 167         struct rtllib_frag_entry *entry;
 168         struct rtllib_hdr_3addrqos *hdr_3addrqos;
 169         struct rtllib_hdr_4addrqos *hdr_4addrqos;
 170         u8 tid;
 171
 172         if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) && RTLLIB_QOS_HAS_SEQ(fc)) {
 173                 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
 174                 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 175                 tid = UP2AC(tid);
 176                 tid++;
 177         } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
 178                 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
 179                 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 180                 tid = UP2AC(tid);
 181                 tid++;
 182         } else {
 183                 tid = 0;
 184         }
 185
 186         entry = rtllib_frag_cache_find(ieee, seq, -1, tid, hdr->addr2,
 187                                           hdr->addr1);
 188
 189         if (entry == NULL) {
 190                 RTLLIB_DEBUG_FRAG(
 191                         "could not invalidate fragment cache "
 192                         "entry (seq=%u)\n", seq);
 193                 return -1;
 194         }
 195
 196         entry->skb = NULL;
 197         return 0;
 198 }
 199
 200 /* rtllib_rx_frame_mgtmt
 201  *
 202  * Responsible for handling management control frames
 203  *
 204  * Called by rtllib_rx */
 205 static inline int
 206 rtllib_rx_frame_mgmt(struct rtllib_device *ieee, struct sk_buff *skb,
 207                         struct rtllib_rx_stats *rx_stats, u16 type,
 208                         u16 stype)
 209 {
 210         /* On the struct stats definition there is written that
 211          * this is not mandatory.... but seems that the probe
 212          * response parser uses it
 213          */
 214         struct rtllib_hdr_3addr *hdr = (struct rtllib_hdr_3addr *)skb->data;
 215
 216         rx_stats->len = skb->len;
 217         rtllib_rx_mgt(ieee, skb, rx_stats);
 218         if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN))) {
 219                 dev_kfree_skb_any(skb);
 220                 return 0;
 221         }
 222         rtllib_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
 223
 224         dev_kfree_skb_any(skb);
 225
 226         return 0;
 227 }
 228
 229 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
 230 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
 231 static unsigned char rfc1042_header[] = {
 232         0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00
 233 };
 234 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
 235 static unsigned char bridge_tunnel_header[] = {
 236         0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8
 237 };
 238 /* No encapsulation header if EtherType < 0x600 (=length) */
 239
 240 /* Called by rtllib_rx_frame_decrypt */
 241 static int rtllib_is_eapol_frame(struct rtllib_device *ieee,
 242                                     struct sk_buff *skb, size_t hdrlen)
 243 {
 244         struct net_device *dev = ieee->dev;
 245         u16 fc, ethertype;
 246         struct rtllib_hdr_4addr *hdr;
 247         u8 *pos;
 248
 249         if (skb->len < 24)
 250                 return 0;
 251
 252         hdr = (struct rtllib_hdr_4addr *) skb->data;
 253         fc = le16_to_cpu(hdr->frame_ctl);
 254
 255         /* check that the frame is unicast frame to us */
 256         if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
 257             RTLLIB_FCTL_TODS &&
 258             memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
 259             memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
 260                 /* ToDS frame with own addr BSSID and DA */
 261         } else if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
 262                    RTLLIB_FCTL_FROMDS &&
 263                    memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
 264                 /* FromDS frame with own addr as DA */
 265         } else
 266                 return 0;
 267
 268         if (skb->len < 24 + 8)
 269                 return 0;
 270
 271         /* check for port access entity Ethernet type */
 272         pos = skb->data + hdrlen;
 273         ethertype = (pos[6] << 8) | pos[7];
 274         if (ethertype == ETH_P_PAE)
 275                 return 1;
 276
 277         return 0;
 278 }
 279
 280 /* Called only as a tasklet (software IRQ), by rtllib_rx */
 281 static inline int
 282 rtllib_rx_frame_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
 283                         struct lib80211_crypt_data *crypt)
 284 {
 285         struct rtllib_hdr_4addr *hdr;
 286         int res, hdrlen;
 287
 288         if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
 289                 return 0;
 290
 291         if (ieee->hwsec_active) {
 292                 struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
 293
 294                 tcb_desc->bHwSec = 1;
 295
 296                 if (ieee->need_sw_enc)
 297                         tcb_desc->bHwSec = 0;
 298         }
 299
 300         hdr = (struct rtllib_hdr_4addr *) skb->data;
 301         hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 302
 303         atomic_inc(&crypt->refcnt);
 304         res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
 305         atomic_dec(&crypt->refcnt);
 306         if (res < 0) {
 307                 RTLLIB_DEBUG_DROP(
 308                         "decryption failed (SA= %pM"
 309                         ") res=%d\n", hdr->addr2, res);
 310                 if (res == -2)
 311                         RTLLIB_DEBUG_DROP("Decryption failed ICV "
 312                                              "mismatch (key %d)\n",
 313                                              skb->data[hdrlen + 3] >> 6);
 314                 ieee->ieee_stats.rx_discards_undecryptable++;
 315                 return -1;
 316         }
 317
 318         return res;
 319 }
 320
 321
 322 /* Called only as a tasklet (software IRQ), by rtllib_rx */
 323 static inline int
 324 rtllib_rx_frame_decrypt_msdu(struct rtllib_device *ieee, struct sk_buff *skb,
 325                              int keyidx, struct lib80211_crypt_data *crypt)
 326 {
 327         struct rtllib_hdr_4addr *hdr;
 328         int res, hdrlen;
 329
 330         if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
 331                 return 0;
 332         if (ieee->hwsec_active) {
 333                 struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
 334
 335                 tcb_desc->bHwSec = 1;
 336
 337                 if (ieee->need_sw_enc)
 338                         tcb_desc->bHwSec = 0;
 339         }
 340
 341         hdr = (struct rtllib_hdr_4addr *) skb->data;
 342         hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 343
 344         atomic_inc(&crypt->refcnt);
 345         res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
 346         atomic_dec(&crypt->refcnt);
 347         if (res < 0) {
 348                 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
 349                        " (SA= %pM keyidx=%d)\n",
 350                        ieee->dev->name, hdr->addr2, keyidx);
 351                 return -1;
 352         }
 353
 354         return 0;
 355 }
 356
 357
 358 /* this function is stolen from ipw2200 driver*/
 359 #define IEEE_PACKET_RETRY_TIME (5*HZ)
 360 static int is_duplicate_packet(struct rtllib_device *ieee,
 361                                       struct rtllib_hdr_4addr *header)
 362 {
 363         u16 fc = le16_to_cpu(header->frame_ctl);
 364         u16 sc = le16_to_cpu(header->seq_ctl);
 365         u16 seq = WLAN_GET_SEQ_SEQ(sc);
 366         u16 frag = WLAN_GET_SEQ_FRAG(sc);
 367         u16 *last_seq, *last_frag;
 368         unsigned long *last_time;
 369         struct rtllib_hdr_3addrqos *hdr_3addrqos;
 370         struct rtllib_hdr_4addrqos *hdr_4addrqos;
 371         u8 tid;
 372
 373         if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) && RTLLIB_QOS_HAS_SEQ(fc)) {
 374                 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)header;
 375                 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 376                 tid = UP2AC(tid);
 377                 tid++;
 378         } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
 379                 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)header;
 380                 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 381                 tid = UP2AC(tid);
 382                 tid++;
 383         } else {
 384                 tid = 0;
 385         }
 386
 387         switch (ieee->iw_mode) {
 388         case IW_MODE_ADHOC:
 389         {
 390                 struct list_head *p;
 391                 struct ieee_ibss_seq *entry = NULL;
 392                 u8 *mac = header->addr2;
 393                 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
 394
 395                 list_for_each(p, &ieee->ibss_mac_hash[index]) {
 396                         entry = list_entry(p, struct ieee_ibss_seq, list);
 397                         if (!memcmp(entry->mac, mac, ETH_ALEN))
 398                                 break;
 399                 }
 400                 if (p == &ieee->ibss_mac_hash[index]) {
 401                         entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC);
 402                         if (!entry) {
 403                                 printk(KERN_WARNING "Cannot malloc new mac entry\n");
 404                                 return 0;
 405                         }
 406                         memcpy(entry->mac, mac, ETH_ALEN);
 407                         entry->seq_num[tid] = seq;
 408                         entry->frag_num[tid] = frag;
 409                         entry->packet_time[tid] = jiffies;
 410                         list_add(&entry->list, &ieee->ibss_mac_hash[index]);
 411                         return 0;
 412                 }
 413                 last_seq = &entry->seq_num[tid];
 414                 last_frag = &entry->frag_num[tid];
 415                 last_time = &entry->packet_time[tid];
 416                 break;
 417         }
 418
 419         case IW_MODE_INFRA:
 420                 last_seq = &ieee->last_rxseq_num[tid];
 421                 last_frag = &ieee->last_rxfrag_num[tid];
 422                 last_time = &ieee->last_packet_time[tid];
 423                 break;
 424         default:
 425                 return 0;
 426         }
 427
 428         if ((*last_seq == seq) &&
 429             time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
 430                 if (*last_frag == frag)
 431                         goto drop;
 432                 if (*last_frag + 1 != frag)
 433                         /* out-of-order fragment */
 434                         goto drop;
 435         } else
 436                 *last_seq = seq;
 437
 438         *last_frag = frag;
 439         *last_time = jiffies;
 440         return 0;
 441
 442 drop:
 443
 444         return 1;
 445 }
 446
 447 static bool AddReorderEntry(struct rx_ts_record *pTS,
 448                             struct rx_reorder_entry *pReorderEntry)
 449 {
 450         struct list_head *pList = &pTS->RxPendingPktList;
 451
 452         while (pList->next != &pTS->RxPendingPktList) {
 453                 if (SN_LESS(pReorderEntry->SeqNum, ((struct rx_reorder_entry *)
 454                     list_entry(pList->next, struct rx_reorder_entry,
 455                     List))->SeqNum))
 456                         pList = pList->next;
 457                 else if (SN_EQUAL(pReorderEntry->SeqNum,
 458                         ((struct rx_reorder_entry *)list_entry(pList->next,
 459                         struct rx_reorder_entry, List))->SeqNum))
 460                                 return false;
 461                 else
 462                         break;
 463         }
 464         pReorderEntry->List.next = pList->next;
 465         pReorderEntry->List.next->prev = &pReorderEntry->List;
 466         pReorderEntry->List.prev = pList;
 467         pList->next = &pReorderEntry->List;
 468
 469         return true;
 470 }
 471
 472 void rtllib_indicate_packets(struct rtllib_device *ieee, struct rtllib_rxb **prxbIndicateArray, u8 index)
 473 {
 474         struct net_device_stats *stats = &ieee->stats;
 475         u8 i = 0 , j = 0;
 476         u16 ethertype;
 477
 478         for (j = 0; j < index; j++) {
 479                 struct rtllib_rxb *prxb = prxbIndicateArray[j];
 480
 481                 for (i = 0; i < prxb->nr_subframes; i++) {
 482                         struct sk_buff *sub_skb = prxb->subframes[i];
 483
 484                 /* convert hdr + possible LLC headers into Ethernet header */
 485                         ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
 486                         if (sub_skb->len >= 8 &&
 487                             ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
 488                             ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
 489                             memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
 490                                 /* remove RFC1042 or Bridge-Tunnel encapsulation
 491                                  * and replace EtherType */
 492                                 skb_pull(sub_skb, SNAP_SIZE);
 493                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
 494                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
 495                         } else {
 496                                 u16 len;
 497                         /* Leave Ethernet header part of hdr and full payload */
 498                                 len = sub_skb->len;
 499                                 memcpy(skb_push(sub_skb, 2), &len, 2);
 500                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
 501                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
 502                         }
 503
 504                         /* Indicate the packets to upper layer */
 505                         if (sub_skb) {
 506                                 stats->rx_packets++;
 507                                 stats->rx_bytes += sub_skb->len;
 508
 509                                 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
 510                                 sub_skb->protocol = eth_type_trans(sub_skb, ieee->dev);
 511                                 sub_skb->dev = ieee->dev;
 512                                 sub_skb->dev->stats.rx_packets++;
 513                                 sub_skb->dev->stats.rx_bytes += sub_skb->len;
 514                                 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
 515                                 ieee->last_rx_ps_time = jiffies;
 516                                 netif_rx(sub_skb);
 517                         }
 518                 }
 519                 kfree(prxb);
 520                 prxb = NULL;
 521         }
 522 }
 523
 524 void rtllib_FlushRxTsPendingPkts(struct rtllib_device *ieee,    struct rx_ts_record *pTS)
 525 {
 526         struct rx_reorder_entry *pRxReorderEntry;
 527         u8 RfdCnt = 0;
 528
 529         del_timer_sync(&pTS->RxPktPendingTimer);
 530         while (!list_empty(&pTS->RxPendingPktList)) {
 531                 if (RfdCnt >= REORDER_WIN_SIZE) {
 532                         printk(KERN_INFO "-------------->%s() error! RfdCnt >= REORDER_WIN_SIZE\n", __func__);
 533                         break;
 534                 }
 535
 536                 pRxReorderEntry = (struct rx_reorder_entry *)list_entry(pTS->RxPendingPktList.prev, struct rx_reorder_entry, List);
 537                 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): Indicate SeqNum %d!\n", __func__, pRxReorderEntry->SeqNum);
 538                 list_del_init(&pRxReorderEntry->List);
 539
 540                 ieee->RfdArray[RfdCnt] = pRxReorderEntry->prxb;
 541
 542                 RfdCnt = RfdCnt + 1;
 543                 list_add_tail(&pRxReorderEntry->List, &ieee->RxReorder_Unused_List);
 544         }
 545         rtllib_indicate_packets(ieee, ieee->RfdArray, RfdCnt);
 546
 547         pTS->RxIndicateSeq = 0xffff;
 548 }
 549
 550 static void RxReorderIndicatePacket(struct rtllib_device *ieee,
 551                                     struct rtllib_rxb *prxb,
 552                                     struct rx_ts_record *pTS, u16 SeqNum)
 553 {
 554         struct rt_hi_throughput *pHTInfo = ieee->pHTInfo;
 555         struct rx_reorder_entry *pReorderEntry = NULL;
 556         u8 WinSize = pHTInfo->RxReorderWinSize;
 557         u16 WinEnd = 0;
 558         u8 index = 0;
 559         bool bMatchWinStart = false, bPktInBuf = false;
 560         unsigned long flags;
 561
 562         RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): Seq is %d, pTS->RxIndicateSeq"
 563                      " is %d, WinSize is %d\n", __func__, SeqNum,
 564                      pTS->RxIndicateSeq, WinSize);
 565
 566         spin_lock_irqsave(&(ieee->reorder_spinlock), flags);
 567
 568         WinEnd = (pTS->RxIndicateSeq + WinSize - 1) % 4096;
 569         /* Rx Reorder initialize condition.*/
 570         if (pTS->RxIndicateSeq == 0xffff)
 571                 pTS->RxIndicateSeq = SeqNum;
 572
 573         /* Drop out the packet which SeqNum is smaller than WinStart */
 574         if (SN_LESS(SeqNum, pTS->RxIndicateSeq)) {
 575                 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
 576                                  pTS->RxIndicateSeq, SeqNum);
 577                 pHTInfo->RxReorderDropCounter++;
 578                 {
 579                         int i;
 580
 581                         for (i = 0; i < prxb->nr_subframes; i++)
 582                                 dev_kfree_skb(prxb->subframes[i]);
 583                         kfree(prxb);
 584                         prxb = NULL;
 585                 }
 586                 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
 587                 return;
 588         }
 589
 590         /*
 591          * Sliding window manipulation. Conditions includes:
 592          * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
 593          * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
 594          */
 595         if (SN_EQUAL(SeqNum, pTS->RxIndicateSeq)) {
 596                 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
 597                 bMatchWinStart = true;
 598         } else if (SN_LESS(WinEnd, SeqNum)) {
 599                 if (SeqNum >= (WinSize - 1))
 600                         pTS->RxIndicateSeq = SeqNum + 1 - WinSize;
 601                 else
 602                         pTS->RxIndicateSeq = 4095 - (WinSize - (SeqNum + 1)) + 1;
 603                 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Window Shift! IndicateSeq: %d,"
 604                              " NewSeq: %d\n", pTS->RxIndicateSeq, SeqNum);
 605         }
 606
 607         /*
 608          * Indication process.
 609          * After Packet dropping and Sliding Window shifting as above, we can
 610          * now just indicate the packets with the SeqNum smaller than latest
 611          * WinStart and struct buffer other packets.
 612          */
 613         /* For Rx Reorder condition:
 614          * 1. All packets with SeqNum smaller than WinStart => Indicate
 615          * 2. All packets with SeqNum larger than or equal to
 616          *       WinStart => Buffer it.
 617          */
 618         if (bMatchWinStart) {
 619                 /* Current packet is going to be indicated.*/
 620                 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Packets indication!! "
 621                                 "IndicateSeq: %d, NewSeq: %d\n",
 622                                 pTS->RxIndicateSeq, SeqNum);
 623                 ieee->prxbIndicateArray[0] = prxb;
 624                 index = 1;
 625         } else {
 626                 /* Current packet is going to be inserted into pending list.*/
 627                 if (!list_empty(&ieee->RxReorder_Unused_List)) {
 628                         pReorderEntry = (struct rx_reorder_entry *)
 629                                         list_entry(ieee->RxReorder_Unused_List.next,
 630                                         struct rx_reorder_entry, List);
 631                         list_del_init(&pReorderEntry->List);
 632
 633                         /* Make a reorder entry and insert into a the packet list.*/
 634                         pReorderEntry->SeqNum = SeqNum;
 635                         pReorderEntry->prxb = prxb;
 636
 637                         if (!AddReorderEntry(pTS, pReorderEntry)) {
 638                                 RTLLIB_DEBUG(RTLLIB_DL_REORDER,
 639                                              "%s(): Duplicate packet is "
 640                                              "dropped!! IndicateSeq: %d, "
 641                                              "NewSeq: %d\n",
 642                                             __func__, pTS->RxIndicateSeq,
 643                                             SeqNum);
 644                                 list_add_tail(&pReorderEntry->List,
 645                                               &ieee->RxReorder_Unused_List); {
 646                                         int i;
 647
 648                                         for (i = 0; i < prxb->nr_subframes; i++)
 649                                                 dev_kfree_skb(prxb->subframes[i]);
 650                                         kfree(prxb);
 651                                         prxb = NULL;
 652                                 }
 653                         } else {
 654                                 RTLLIB_DEBUG(RTLLIB_DL_REORDER,
 655                                          "Pkt insert into struct buffer!! "
 656                                          "IndicateSeq: %d, NewSeq: %d\n",
 657                                          pTS->RxIndicateSeq, SeqNum);
 658                         }
 659                 } else {
 660                         /*
 661                          * Packets are dropped if there are not enough reorder
 662                          * entries. This part should be modified!! We can just
 663                          * indicate all the packets in struct buffer and get
 664                          * reorder entries.
 665                          */
 666                         RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket():"
 667                                      " There is no reorder entry!! Packet is "
 668                                      "dropped!!\n");
 669                         {
 670                                 int i;
 671
 672                                 for (i = 0; i < prxb->nr_subframes; i++)
 673                                         dev_kfree_skb(prxb->subframes[i]);
 674                                 kfree(prxb);
 675                                 prxb = NULL;
 676                         }
 677                 }
 678         }
 679
 680         /* Check if there is any packet need indicate.*/
 681         while (!list_empty(&pTS->RxPendingPktList)) {
 682                 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): start RREORDER indicate\n", __func__);
 683
 684                 pReorderEntry = (struct rx_reorder_entry *)list_entry(pTS->RxPendingPktList.prev,
 685                                  struct rx_reorder_entry, List);
 686                 if (SN_LESS(pReorderEntry->SeqNum, pTS->RxIndicateSeq) ||
 687                                 SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq)) {
 688                         /* This protect struct buffer from overflow. */
 689                         if (index >= REORDER_WIN_SIZE) {
 690                                 RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicate"
 691                                              "Packet(): Buffer overflow!!\n");
 692                                 bPktInBuf = true;
 693                                 break;
 694                         }
 695
 696                         list_del_init(&pReorderEntry->List);
 697
 698                         if (SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
 699                                 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
 700
 701                         ieee->prxbIndicateArray[index] = pReorderEntry->prxb;
 702                         RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): Indicate SeqNum"
 703                                      " %d!\n", __func__, pReorderEntry->SeqNum);
 704                         index++;
 705
 706                         list_add_tail(&pReorderEntry->List,
 707                                       &ieee->RxReorder_Unused_List);
 708                 } else {
 709                         bPktInBuf = true;
 710                         break;
 711                 }
 712         }
 713
 714         /* Handling pending timer. Set this timer to prevent from long time
 715          * Rx buffering.*/
 716         if (index > 0) {
 717                 if (timer_pending(&pTS->RxPktPendingTimer))
 718                         del_timer_sync(&pTS->RxPktPendingTimer);
 719                 pTS->RxTimeoutIndicateSeq = 0xffff;
 720
 721                 if (index > REORDER_WIN_SIZE) {
 722                         RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket():"
 723                                      " Rx Reorder struct buffer full!!\n");
 724                         spin_unlock_irqrestore(&(ieee->reorder_spinlock),
 725                                                flags);
 726                         return;
 727                 }
 728                 rtllib_indicate_packets(ieee, ieee->prxbIndicateArray, index);
 729                 bPktInBuf = false;
 730         }
 731
 732         if (bPktInBuf && pTS->RxTimeoutIndicateSeq == 0xffff) {
 733                 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): SET rx timeout timer\n",
 734                              __func__);
 735                 pTS->RxTimeoutIndicateSeq = pTS->RxIndicateSeq;
 736                 mod_timer(&pTS->RxPktPendingTimer, jiffies +
 737                           MSECS(pHTInfo->RxReorderPendingTime));
 738         }
 739         spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
 740 }
 741
 742 static u8 parse_subframe(struct rtllib_device *ieee, struct sk_buff *skb,
 743                          struct rtllib_rx_stats *rx_stats,
 744                          struct rtllib_rxb *rxb, u8 *src, u8 *dst)
 745 {
 746         struct rtllib_hdr_3addr  *hdr = (struct rtllib_hdr_3addr *)skb->data;
 747         u16             fc = le16_to_cpu(hdr->frame_ctl);
 748
 749         u16             LLCOffset = sizeof(struct rtllib_hdr_3addr);
 750         u16             ChkLength;
 751         bool            bIsAggregateFrame = false;
 752         u16             nSubframe_Length;
 753         u8              nPadding_Length = 0;
 754         u16             SeqNum = 0;
 755         struct sk_buff *sub_skb;
 756         u8           *data_ptr;
 757         /* just for debug purpose */
 758         SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl));
 759         if ((RTLLIB_QOS_HAS_SEQ(fc)) &&
 760            (((union frameqos *)(skb->data + RTLLIB_3ADDR_LEN))->field.reserved))
 761                 bIsAggregateFrame = true;
 762
 763         if (RTLLIB_QOS_HAS_SEQ(fc))
 764                 LLCOffset += 2;
 765         if (rx_stats->bContainHTC)
 766                 LLCOffset += sHTCLng;
 767
 768         ChkLength = LLCOffset;
 769
 770         if (skb->len <= ChkLength)
 771                 return 0;
 772
 773         skb_pull(skb, LLCOffset);
 774         ieee->bIsAggregateFrame = bIsAggregateFrame;
 775         if (!bIsAggregateFrame) {
 776                 rxb->nr_subframes = 1;
 777
 778                 /* altered by clark 3/30/2010
 779                  * The struct buffer size of the skb indicated to upper layer
 780                  * must be less than 5000, or the defraged IP datagram
 781                  * in the IP layer will exceed "ipfrag_high_tresh" and be
 782                  * discarded. so there must not use the function
 783                  * "skb_copy" and "skb_clone" for "skb".
 784                  */
 785
 786                 /* Allocate new skb for releasing to upper layer */
 787                 sub_skb = dev_alloc_skb(RTLLIB_SKBBUFFER_SIZE);
 788                 if (!sub_skb)
 789                         return 0;
 790                 skb_reserve(sub_skb, 12);
 791                 data_ptr = (u8 *)skb_put(sub_skb, skb->len);
 792                 memcpy(data_ptr, skb->data, skb->len);
 793                 sub_skb->dev = ieee->dev;
 794
 795                 rxb->subframes[0] = sub_skb;
 796
 797                 memcpy(rxb->src, src, ETH_ALEN);
 798                 memcpy(rxb->dst, dst, ETH_ALEN);
 799                 rxb->subframes[0]->dev = ieee->dev;
 800                 return 1;
 801         } else {
 802                 rxb->nr_subframes = 0;
 803                 memcpy(rxb->src, src, ETH_ALEN);
 804                 memcpy(rxb->dst, dst, ETH_ALEN);
 805                 while (skb->len > ETHERNET_HEADER_SIZE) {
 806                         /* Offset 12 denote 2 mac address */
 807                         nSubframe_Length = *((u16 *)(skb->data + 12));
 808                         nSubframe_Length = (nSubframe_Length >> 8) +
 809                                            (nSubframe_Length << 8);
 810
 811                         if (skb->len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
 812                                 printk(KERN_INFO "%s: A-MSDU parse error!! "
 813                                        "pRfd->nTotalSubframe : %d\n",\
 814                                        __func__, rxb->nr_subframes);
 815                                 printk(KERN_INFO "%s: A-MSDU parse error!! "
 816                                        "Subframe Length: %d\n", __func__,
 817                                        nSubframe_Length);
 818                                 printk(KERN_INFO "nRemain_Length is %d and "
 819                                        "nSubframe_Length is : %d\n", skb->len,
 820                                        nSubframe_Length);
 821                                 printk(KERN_INFO "The Packet SeqNum is %d\n", SeqNum);
 822                                 return 0;
 823                         }
 824
 825                         /* move the data point to data content */
 826                         skb_pull(skb, ETHERNET_HEADER_SIZE);
 827
 828                         /* altered by clark 3/30/2010
 829                          * The struct buffer size of the skb indicated to upper layer
 830                          * must be less than 5000, or the defraged IP datagram
 831                          * in the IP layer will exceed "ipfrag_high_tresh" and be
 832                          * discarded. so there must not use the function
 833                          * "skb_copy" and "skb_clone" for "skb".
 834                          */
 835
 836                         /* Allocate new skb for releasing to upper layer */
 837                         sub_skb = dev_alloc_skb(nSubframe_Length + 12);
 838                         if (!sub_skb)
 839                                 return 0;
 840                         skb_reserve(sub_skb, 12);
 841                         data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
 842                         memcpy(data_ptr, skb->data, nSubframe_Length);
 843
 844                         sub_skb->dev = ieee->dev;
 845                         rxb->subframes[rxb->nr_subframes++] = sub_skb;
 846                         if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
 847                                 RTLLIB_DEBUG_RX("ParseSubframe(): Too many "
 848                                                 "Subframes! Packets dropped!\n");
 849                                 break;
 850                         }
 851                         skb_pull(skb, nSubframe_Length);
 852
 853                         if (skb->len != 0) {
 854                                 nPadding_Length = 4 - ((nSubframe_Length +
 855                                                   ETHERNET_HEADER_SIZE) % 4);
 856                                 if (nPadding_Length == 4)
 857                                         nPadding_Length = 0;
 858
 859                                 if (skb->len < nPadding_Length)
 860                                         return 0;
 861
 862                                 skb_pull(skb, nPadding_Length);
 863                         }
 864                 }
 865
 866                 return rxb->nr_subframes;
 867         }
 868 }
 869
 870
 871 static size_t rtllib_rx_get_hdrlen(struct rtllib_device *ieee,
 872                                    struct sk_buff *skb,
 873                                    struct rtllib_rx_stats *rx_stats)
 874 {
 875         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
 876         u16 fc = le16_to_cpu(hdr->frame_ctl);
 877         size_t hdrlen = 0;
 878
 879         hdrlen = rtllib_get_hdrlen(fc);
 880         if (HTCCheck(ieee, skb->data)) {
 881                 if (net_ratelimit())
 882                         printk(KERN_INFO "%s: find HTCControl!\n", __func__);
 883                 hdrlen += 4;
 884                 rx_stats->bContainHTC = true;
 885         }
 886
 887          if (RTLLIB_QOS_HAS_SEQ(fc))
 888                 rx_stats->bIsQosData = true;
 889
 890         return hdrlen;
 891 }
 892
 893 static int rtllib_rx_check_duplicate(struct rtllib_device *ieee,
 894                                      struct sk_buff *skb, u8 multicast)
 895 {
 896         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
 897         u16 fc, sc;
 898         u8 frag, type, stype;
 899
 900         fc = le16_to_cpu(hdr->frame_ctl);
 901         type = WLAN_FC_GET_TYPE(fc);
 902         stype = WLAN_FC_GET_STYPE(fc);
 903         sc = le16_to_cpu(hdr->seq_ctl);
 904         frag = WLAN_GET_SEQ_FRAG(sc);
 905
 906         if ((ieee->pHTInfo->bCurRxReorderEnable == false) ||
 907                 !ieee->current_network.qos_data.active ||
 908                 !IsDataFrame(skb->data) ||
 909                 IsLegacyDataFrame(skb->data)) {
 910                 if (!((type == RTLLIB_FTYPE_MGMT) && (stype == RTLLIB_STYPE_BEACON))) {
 911                         if (is_duplicate_packet(ieee, hdr))
 912                                 return -1;
 913                 }
 914         } else {
 915                 struct rx_ts_record *pRxTS = NULL;
 916
 917                 if (GetTs(ieee, (struct ts_common_info **) &pRxTS, hdr->addr2,
 918                         (u8)Frame_QoSTID((u8 *)(skb->data)), RX_DIR, true)) {
 919                         if ((fc & (1<<11)) && (frag == pRxTS->RxLastFragNum) &&
 920                             (WLAN_GET_SEQ_SEQ(sc) == pRxTS->RxLastSeqNum))
 921                                 return -1;
 922                         pRxTS->RxLastFragNum = frag;
 923                         pRxTS->RxLastSeqNum = WLAN_GET_SEQ_SEQ(sc);
 924                 } else {
 925                         RTLLIB_DEBUG(RTLLIB_DL_ERR, "ERR!!%s(): No TS!! Skip"
 926                                      " the check!!\n", __func__);
 927                         return -1;
 928                 }
 929         }
 930
 931         return 0;
 932 }
 933
 934 static void rtllib_rx_extract_addr(struct rtllib_device *ieee,
 935                                    struct rtllib_hdr_4addr *hdr, u8 *dst,
 936                                    u8 *src, u8 *bssid)
 937 {
 938         u16 fc = le16_to_cpu(hdr->frame_ctl);
 939
 940         switch (fc & (RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS)) {
 941         case RTLLIB_FCTL_FROMDS:
 942                 memcpy(dst, hdr->addr1, ETH_ALEN);
 943                 memcpy(src, hdr->addr3, ETH_ALEN);
 944                 memcpy(bssid, hdr->addr2, ETH_ALEN);
 945                 break;
 946         case RTLLIB_FCTL_TODS:
 947                 memcpy(dst, hdr->addr3, ETH_ALEN);
 948                 memcpy(src, hdr->addr2, ETH_ALEN);
 949                 memcpy(bssid, hdr->addr1, ETH_ALEN);
 950                 break;
 951         case RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS:
 952                 memcpy(dst, hdr->addr3, ETH_ALEN);
 953                 memcpy(src, hdr->addr4, ETH_ALEN);
 954                 memcpy(bssid, ieee->current_network.bssid, ETH_ALEN);
 955                 break;
 956         case 0:
 957                 memcpy(dst, hdr->addr1, ETH_ALEN);
 958                 memcpy(src, hdr->addr2, ETH_ALEN);
 959                 memcpy(bssid, hdr->addr3, ETH_ALEN);
 960                 break;
 961         }
 962 }
 963
 964 static int rtllib_rx_data_filter(struct rtllib_device *ieee, u16 fc,
 965                                  u8 *dst, u8 *src, u8 *bssid, u8 *addr2)
 966 {
 967         u8 type, stype;
 968
 969         type = WLAN_FC_GET_TYPE(fc);
 970         stype = WLAN_FC_GET_STYPE(fc);
 971
 972         /* Filter frames from different BSS */
 973         if (((fc & RTLLIB_FCTL_DSTODS) != RTLLIB_FCTL_DSTODS) &&
 974             !ether_addr_equal(ieee->current_network.bssid, bssid) &&
 975             !is_zero_ether_addr(ieee->current_network.bssid)) {
 976                 return -1;
 977         }
 978
 979         /* Filter packets sent by an STA that will be forwarded by AP */
 980         if (ieee->IntelPromiscuousModeInfo.bPromiscuousOn  &&
 981                 ieee->IntelPromiscuousModeInfo.bFilterSourceStationFrame) {
 982                 if ((fc & RTLLIB_FCTL_TODS) && !(fc & RTLLIB_FCTL_FROMDS) &&
 983                     !ether_addr_equal(dst, ieee->current_network.bssid) &&
 984                     ether_addr_equal(bssid, ieee->current_network.bssid)) {
 985                         return -1;
 986                 }
 987         }
 988
 989         /* Nullfunc frames may have PS-bit set, so they must be passed to
 990          * hostap_handle_sta_rx() before being dropped here. */
 991         if (!ieee->IntelPromiscuousModeInfo.bPromiscuousOn) {
 992                 if (stype != RTLLIB_STYPE_DATA &&
 993                     stype != RTLLIB_STYPE_DATA_CFACK &&
 994                     stype != RTLLIB_STYPE_DATA_CFPOLL &&
 995                     stype != RTLLIB_STYPE_DATA_CFACKPOLL &&
 996                     stype != RTLLIB_STYPE_QOS_DATA) {
 997                         if (stype != RTLLIB_STYPE_NULLFUNC)
 998                                 RTLLIB_DEBUG_DROP(
 999                                         "RX: dropped data frame "
1000                                         "with no data (type=0x%02x, "
1001                                         "subtype=0x%02x)\n",
1002                                         type, stype);
1003                         return -1;
1004                 }
1005         }
1006
1007         if (ieee->iw_mode != IW_MODE_MESH) {
1008                 /* packets from our adapter are dropped (echo) */
1009                 if (!memcmp(src, ieee->dev->dev_addr, ETH_ALEN))
1010                         return -1;
1011
1012                 /* {broad,multi}cast packets to our BSS go through */
1013                 if (is_multicast_ether_addr(dst)) {
1014                         if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN))
1015                                 return -1;
1016                 }
1017         }
1018         return 0;
1019 }
1020
1021 static int rtllib_rx_get_crypt(struct rtllib_device *ieee, struct sk_buff *skb,
1022                         struct lib80211_crypt_data **crypt, size_t hdrlen)
1023 {
1024         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1025         u16 fc = le16_to_cpu(hdr->frame_ctl);
1026         int idx = 0;
1027
1028         if (ieee->host_decrypt) {
1029                 if (skb->len >= hdrlen + 3)
1030                         idx = skb->data[hdrlen + 3] >> 6;
1031
1032                 *crypt = ieee->crypt_info.crypt[idx];
1033                 /* allow NULL decrypt to indicate an station specific override
1034                  * for default encryption */
1035                 if (*crypt && ((*crypt)->ops == NULL ||
1036                               (*crypt)->ops->decrypt_mpdu == NULL))
1037                         *crypt = NULL;
1038
1039                 if (!*crypt && (fc & RTLLIB_FCTL_WEP)) {
1040                         /* This seems to be triggered by some (multicast?)
1041                          * frames from other than current BSS, so just drop the
1042                          * frames silently instead of filling system log with
1043                          * these reports. */
1044                         RTLLIB_DEBUG_DROP("Decryption failed (not set)"
1045                                              " (SA= %pM)\n",
1046                                              hdr->addr2);
1047                         ieee->ieee_stats.rx_discards_undecryptable++;
1048                         return -1;
1049                 }
1050         }
1051
1052         return 0;
1053 }
1054
1055 static int rtllib_rx_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
1056                       struct rtllib_rx_stats *rx_stats,
1057                       struct lib80211_crypt_data *crypt, size_t hdrlen)
1058 {
1059         struct rtllib_hdr_4addr *hdr;
1060         int keyidx = 0;
1061         u16 fc, sc;
1062         u8 frag;
1063
1064         hdr = (struct rtllib_hdr_4addr *)skb->data;
1065         fc = le16_to_cpu(hdr->frame_ctl);
1066         sc = le16_to_cpu(hdr->seq_ctl);
1067         frag = WLAN_GET_SEQ_FRAG(sc);
1068
1069         if ((!rx_stats->Decrypted))
1070                 ieee->need_sw_enc = 1;
1071         else
1072                 ieee->need_sw_enc = 0;
1073
1074         keyidx = rtllib_rx_frame_decrypt(ieee, skb, crypt);
1075         if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) && (keyidx < 0)) {
1076                 printk(KERN_INFO "%s: decrypt frame error\n", __func__);
1077                 return -1;
1078         }
1079
1080         hdr = (struct rtllib_hdr_4addr *) skb->data;
1081         if ((frag != 0 || (fc & RTLLIB_FCTL_MOREFRAGS))) {
1082                 int flen;
1083                 struct sk_buff *frag_skb = rtllib_frag_cache_get(ieee, hdr);
1084
1085                 RTLLIB_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
1086
1087                 if (!frag_skb) {
1088                         RTLLIB_DEBUG(RTLLIB_DL_RX | RTLLIB_DL_FRAG,
1089                                         "Rx cannot get skb from fragment "
1090                                         "cache (morefrag=%d seq=%u frag=%u)\n",
1091                                         (fc & RTLLIB_FCTL_MOREFRAGS) != 0,
1092                                         WLAN_GET_SEQ_SEQ(sc), frag);
1093                         return -1;
1094                 }
1095                 flen = skb->len;
1096                 if (frag != 0)
1097                         flen -= hdrlen;
1098
1099                 if (frag_skb->tail + flen > frag_skb->end) {
1100                         printk(KERN_WARNING "%s: host decrypted and "
1101                                "reassembled frame did not fit skb\n",
1102                                __func__);
1103                         rtllib_frag_cache_invalidate(ieee, hdr);
1104                         return -1;
1105                 }
1106
1107                 if (frag == 0) {
1108                         /* copy first fragment (including full headers) into
1109                          * beginning of the fragment cache skb */
1110                         memcpy(skb_put(frag_skb, flen), skb->data, flen);
1111                 } else {
1112                         /* append frame payload to the end of the fragment
1113                          * cache skb */
1114                         memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
1115                                flen);
1116                 }
1117                 dev_kfree_skb_any(skb);
1118                 skb = NULL;
1119
1120                 if (fc & RTLLIB_FCTL_MOREFRAGS) {
1121                         /* more fragments expected - leave the skb in fragment
1122                          * cache for now; it will be delivered to upper layers
1123                          * after all fragments have been received */
1124                         return -2;
1125                 }
1126
1127                 /* this was the last fragment and the frame will be
1128                  * delivered, so remove skb from fragment cache */
1129                 skb = frag_skb;
1130                 hdr = (struct rtllib_hdr_4addr *) skb->data;
1131                 rtllib_frag_cache_invalidate(ieee, hdr);
1132         }
1133
1134         /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
1135          * encrypted/authenticated */
1136         if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) &&
1137                 rtllib_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) {
1138                 printk(KERN_INFO "%s: ==>decrypt msdu error\n", __func__);
1139                 return -1;
1140         }
1141
1142         hdr = (struct rtllib_hdr_4addr *) skb->data;
1143         if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep) {
1144                 if (/*ieee->ieee802_1x &&*/
1145                     rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1146
1147                         /* pass unencrypted EAPOL frames even if encryption is
1148                          * configured */
1149                         struct eapol *eap = (struct eapol *)(skb->data +
1150                                 24);
1151                         RTLLIB_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1152                                                 eap_get_type(eap->type));
1153                 } else {
1154                         RTLLIB_DEBUG_DROP(
1155                                 "encryption configured, but RX "
1156                                 "frame not encrypted (SA= %pM)\n",
1157                                 hdr->addr2);
1158                         return -1;
1159                 }
1160         }
1161
1162         if (crypt && !(fc & RTLLIB_FCTL_WEP) &&
1163             rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1164                         struct eapol *eap = (struct eapol *)(skb->data +
1165                                 24);
1166                         RTLLIB_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1167                                                 eap_get_type(eap->type));
1168         }
1169
1170         if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep &&
1171             !rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1172                 RTLLIB_DEBUG_DROP(
1173                         "dropped unencrypted RX data "
1174                         "frame from %pM"
1175                         " (drop_unencrypted=1)\n",
1176                         hdr->addr2);
1177                 return -1;
1178         }
1179
1180         if (rtllib_is_eapol_frame(ieee, skb, hdrlen))
1181                 printk(KERN_WARNING "RX: IEEE802.1X EAPOL frame!\n");
1182
1183         return 0;
1184 }
1185
1186 static void rtllib_rx_check_leave_lps(struct rtllib_device *ieee, u8 unicast, u8 nr_subframes)
1187 {
1188         if (unicast) {
1189
1190                 if ((ieee->state == RTLLIB_LINKED)) {
1191                         if (((ieee->LinkDetectInfo.NumRxUnicastOkInPeriod +
1192                             ieee->LinkDetectInfo.NumTxOkInPeriod) > 8) ||
1193                             (ieee->LinkDetectInfo.NumRxUnicastOkInPeriod > 2)) {
1194                                 if (ieee->LeisurePSLeave)
1195                                         ieee->LeisurePSLeave(ieee->dev);
1196                         }
1197                 }
1198         }
1199         ieee->last_rx_ps_time = jiffies;
1200 }
1201
1202 static void rtllib_rx_indicate_pkt_legacy(struct rtllib_device *ieee,
1203                 struct rtllib_rx_stats *rx_stats,
1204                 struct rtllib_rxb *rxb,
1205                 u8 *dst,
1206                 u8 *src)
1207 {
1208         struct net_device *dev = ieee->dev;
1209         u16 ethertype;
1210         int i = 0;
1211
1212         if (rxb == NULL) {
1213                 printk(KERN_INFO "%s: rxb is NULL!!\n", __func__);
1214                 return ;
1215         }
1216
1217         for (i = 0; i < rxb->nr_subframes; i++) {
1218                 struct sk_buff *sub_skb = rxb->subframes[i];
1219
1220                 if (sub_skb) {
1221                         /* convert hdr + possible LLC headers into Ethernet header */
1222                         ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
1223                         if (sub_skb->len >= 8 &&
1224                                 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
1225                                 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1226                                 memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
1227                                 /* remove RFC1042 or Bridge-Tunnel encapsulation and
1228                                  * replace EtherType */
1229                                 skb_pull(sub_skb, SNAP_SIZE);
1230                                 memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1231                                 memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1232                         } else {
1233                                 u16 len;
1234                                 /* Leave Ethernet header part of hdr and full payload */
1235                                 len = sub_skb->len;
1236                                 memcpy(skb_push(sub_skb, 2), &len, 2);
1237                                 memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1238                                 memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1239                         }
1240
1241                         ieee->stats.rx_packets++;
1242                         ieee->stats.rx_bytes += sub_skb->len;
1243
1244                         if (is_multicast_ether_addr(dst))
1245                                 ieee->stats.multicast++;
1246
1247                         /* Indicate the packets to upper layer */
1248                         memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
1249                         sub_skb->protocol = eth_type_trans(sub_skb, dev);
1250                         sub_skb->dev = dev;
1251                         sub_skb->dev->stats.rx_packets++;
1252                         sub_skb->dev->stats.rx_bytes += sub_skb->len;
1253                         sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
1254                         netif_rx(sub_skb);
1255                 }
1256         }
1257         kfree(rxb);
1258         rxb = NULL;
1259 }
1260
1261 static int rtllib_rx_InfraAdhoc(struct rtllib_device *ieee, struct sk_buff *skb,
1262                  struct rtllib_rx_stats *rx_stats)
1263 {
1264         struct net_device *dev = ieee->dev;
1265         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1266         struct lib80211_crypt_data *crypt = NULL;
1267         struct rtllib_rxb *rxb = NULL;
1268         struct rx_ts_record *pTS = NULL;
1269         u16 fc, sc, SeqNum = 0;
1270         u8 type, stype, multicast = 0, unicast = 0, nr_subframes = 0, TID = 0;
1271         u8 dst[ETH_ALEN], src[ETH_ALEN], bssid[ETH_ALEN] = {0}, *payload;
1272         size_t hdrlen = 0;
1273         bool bToOtherSTA = false;
1274         int ret = 0, i = 0;
1275
1276         hdr = (struct rtllib_hdr_4addr *)skb->data;
1277         fc = le16_to_cpu(hdr->frame_ctl);
1278         type = WLAN_FC_GET_TYPE(fc);
1279         stype = WLAN_FC_GET_STYPE(fc);
1280         sc = le16_to_cpu(hdr->seq_ctl);
1281
1282         /*Filter pkt not to me*/
1283         multicast = is_multicast_ether_addr(hdr->addr1);
1284         unicast = !multicast;
1285         if (unicast && !ether_addr_equal(dev->dev_addr, hdr->addr1)) {
1286                 if (ieee->bNetPromiscuousMode)
1287                         bToOtherSTA = true;
1288                 else
1289                         goto rx_dropped;
1290         }
1291
1292         /*Filter pkt has too small length */
1293         hdrlen = rtllib_rx_get_hdrlen(ieee, skb, rx_stats);
1294         if (skb->len < hdrlen) {
1295                 printk(KERN_INFO "%s():ERR!!! skb->len is smaller than hdrlen\n", __func__);
1296                 goto rx_dropped;
1297         }
1298
1299         /* Filter Duplicate pkt */
1300         ret = rtllib_rx_check_duplicate(ieee, skb, multicast);
1301         if (ret < 0)
1302                 goto rx_dropped;
1303
1304         /* Filter CTRL Frame */
1305         if (type == RTLLIB_FTYPE_CTL)
1306                 goto rx_dropped;
1307
1308         /* Filter MGNT Frame */
1309         if (type == RTLLIB_FTYPE_MGMT) {
1310                 if (bToOtherSTA)
1311                         goto rx_dropped;
1312                 if (rtllib_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
1313                         goto rx_dropped;
1314                 else
1315                         goto rx_exit;
1316         }
1317
1318         /* Filter WAPI DATA Frame */
1319
1320         /* Update statstics for AP roaming */
1321         if (!bToOtherSTA) {
1322                 ieee->LinkDetectInfo.NumRecvDataInPeriod++;
1323                 ieee->LinkDetectInfo.NumRxOkInPeriod++;
1324         }
1325         dev->last_rx = jiffies;
1326
1327         /* Data frame - extract src/dst addresses */
1328         rtllib_rx_extract_addr(ieee, hdr, dst, src, bssid);
1329
1330         /* Filter Data frames */
1331         ret = rtllib_rx_data_filter(ieee, fc, dst, src, bssid, hdr->addr2);
1332         if (ret < 0)
1333                 goto rx_dropped;
1334
1335         if (skb->len == hdrlen)
1336                 goto rx_dropped;
1337
1338         /* Send pspoll based on moredata */
1339         if ((ieee->iw_mode == IW_MODE_INFRA)  && (ieee->sta_sleep == LPS_IS_SLEEP)
1340                 && (ieee->polling) && (!bToOtherSTA)) {
1341                 if (WLAN_FC_MORE_DATA(fc)) {
1342                         /* more data bit is set, let's request a new frame from the AP */
1343                         rtllib_sta_ps_send_pspoll_frame(ieee);
1344                 } else {
1345                         ieee->polling =  false;
1346                 }
1347         }
1348
1349         /* Get crypt if encrypted */
1350         ret = rtllib_rx_get_crypt(ieee, skb, &crypt, hdrlen);
1351         if (ret == -1)
1352                 goto rx_dropped;
1353
1354         /* Decrypt data frame (including reassemble) */
1355         ret = rtllib_rx_decrypt(ieee, skb, rx_stats, crypt, hdrlen);
1356         if (ret == -1)
1357                 goto rx_dropped;
1358         else if (ret == -2)
1359                 goto rx_exit;
1360
1361         /* Get TS for Rx Reorder  */
1362         hdr = (struct rtllib_hdr_4addr *) skb->data;
1363         if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
1364                 && !is_multicast_ether_addr(hdr->addr1)
1365                 && (!bToOtherSTA)) {
1366                 TID = Frame_QoSTID(skb->data);
1367                 SeqNum = WLAN_GET_SEQ_SEQ(sc);
1368                 GetTs(ieee, (struct ts_common_info **) &pTS, hdr->addr2, TID, RX_DIR, true);
1369                 if (TID != 0 && TID != 3)
1370                         ieee->bis_any_nonbepkts = true;
1371         }
1372
1373         /* Parse rx data frame (For AMSDU) */
1374         /* skb: hdr + (possible reassembled) full plaintext payload */
1375         payload = skb->data + hdrlen;
1376         rxb = kmalloc(sizeof(struct rtllib_rxb), GFP_ATOMIC);
1377         if (rxb == NULL) {
1378                 RTLLIB_DEBUG(RTLLIB_DL_ERR,
1379                              "%s(): kmalloc rxb error\n", __func__);
1380                 goto rx_dropped;
1381         }
1382         /* to parse amsdu packets */
1383         /* qos data packets & reserved bit is 1 */
1384         if (parse_subframe(ieee, skb, rx_stats, rxb, src, dst) == 0) {
1385                 /* only to free rxb, and not submit the packets to upper layer */
1386                 for (i = 0; i < rxb->nr_subframes; i++)
1387                         dev_kfree_skb(rxb->subframes[i]);
1388                 kfree(rxb);
1389                 rxb = NULL;
1390                 goto rx_dropped;
1391         }
1392
1393         /* Update WAPI PN */
1394
1395         /* Check if leave LPS */
1396         if (!bToOtherSTA) {
1397                 if (ieee->bIsAggregateFrame)
1398                         nr_subframes = rxb->nr_subframes;
1399                 else
1400                         nr_subframes = 1;
1401                 if (unicast)
1402                         ieee->LinkDetectInfo.NumRxUnicastOkInPeriod += nr_subframes;
1403                 rtllib_rx_check_leave_lps(ieee, unicast, nr_subframes);
1404         }
1405
1406         /* Indicate packets to upper layer or Rx Reorder */
1407         if (ieee->pHTInfo->bCurRxReorderEnable == false || pTS == NULL || bToOtherSTA)
1408                 rtllib_rx_indicate_pkt_legacy(ieee, rx_stats, rxb, dst, src);
1409         else
1410                 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
1411
1412         dev_kfree_skb(skb);
1413
1414  rx_exit:
1415         return 1;
1416
1417  rx_dropped:
1418         if (rxb != NULL) {
1419                 kfree(rxb);
1420                 rxb = NULL;
1421         }
1422         ieee->stats.rx_dropped++;
1423
1424         /* Returning 0 indicates to caller that we have not handled the SKB--
1425          * so it is still allocated and can be used again by underlying
1426          * hardware as a DMA target */
1427         return 0;
1428 }
1429
1430 static int rtllib_rx_Master(struct rtllib_device *ieee, struct sk_buff *skb,
1431                  struct rtllib_rx_stats *rx_stats)
1432 {
1433         return 0;
1434 }
1435
1436 static int rtllib_rx_Monitor(struct rtllib_device *ieee, struct sk_buff *skb,
1437                  struct rtllib_rx_stats *rx_stats)
1438 {
1439         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1440         u16 fc = le16_to_cpu(hdr->frame_ctl);
1441         size_t hdrlen = rtllib_get_hdrlen(fc);
1442
1443         if (skb->len < hdrlen) {
1444                 printk(KERN_INFO "%s():ERR!!! skb->len is smaller than hdrlen\n", __func__);
1445                 return 0;
1446         }
1447
1448         if (HTCCheck(ieee, skb->data)) {
1449                 if (net_ratelimit())
1450                         printk(KERN_INFO "%s: Find HTCControl!\n", __func__);
1451                 hdrlen += 4;
1452         }
1453
1454         rtllib_monitor_rx(ieee, skb, rx_stats, hdrlen);
1455         ieee->stats.rx_packets++;
1456         ieee->stats.rx_bytes += skb->len;
1457
1458         return 1;
1459 }
1460
1461 static int rtllib_rx_Mesh(struct rtllib_device *ieee, struct sk_buff *skb,
1462                  struct rtllib_rx_stats *rx_stats)
1463 {
1464         return 0;
1465 }
1466
1467 /* All received frames are sent to this function. @skb contains the frame in
1468  * IEEE 802.11 format, i.e., in the format it was sent over air.
1469  * This function is called only as a tasklet (software IRQ). */
1470 int rtllib_rx(struct rtllib_device *ieee, struct sk_buff *skb,
1471                  struct rtllib_rx_stats *rx_stats)
1472 {
1473         int ret = 0;
1474
1475         if ((NULL == ieee) || (NULL == skb) || (NULL == rx_stats)) {
1476                 printk(KERN_INFO "%s: Input parameters NULL!\n", __func__);
1477                 goto rx_dropped;
1478         }
1479         if (skb->len < 10) {
1480                 printk(KERN_INFO "%s: SKB length < 10\n", __func__);
1481                 goto rx_dropped;
1482         }
1483
1484         switch (ieee->iw_mode) {
1485         case IW_MODE_ADHOC:
1486         case IW_MODE_INFRA:
1487                 ret = rtllib_rx_InfraAdhoc(ieee, skb, rx_stats);
1488                 break;
1489         case IW_MODE_MASTER:
1490         case IW_MODE_REPEAT:
1491                 ret = rtllib_rx_Master(ieee, skb, rx_stats);
1492                 break;
1493         case IW_MODE_MONITOR:
1494                 ret = rtllib_rx_Monitor(ieee, skb, rx_stats);
1495                 break;
1496         case IW_MODE_MESH:
1497                 ret = rtllib_rx_Mesh(ieee, skb, rx_stats);
1498                 break;
1499         default:
1500                 printk(KERN_INFO"%s: ERR iw mode!!!\n", __func__);
1501                 break;
1502         }
1503
1504         return ret;
1505
1506  rx_dropped:
1507         if (ieee)
1508                 ieee->stats.rx_dropped++;
1509         return 0;
1510 }
1511 EXPORT_SYMBOL(rtllib_rx);
1512
1513 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
1514
1515 /*
1516 * Make ther structure we read from the beacon packet has
1517 * the right values
1518 */
1519 static int rtllib_verify_qos_info(struct rtllib_qos_information_element
1520                                      *info_element, int sub_type)
1521 {
1522
1523         if (info_element->qui_subtype != sub_type)
1524                 return -1;
1525         if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
1526                 return -1;
1527         if (info_element->qui_type != QOS_OUI_TYPE)
1528                 return -1;
1529         if (info_element->version != QOS_VERSION_1)
1530                 return -1;
1531
1532         return 0;
1533 }
1534
1535
1536 /*
1537  * Parse a QoS parameter element
1538  */
1539 static int rtllib_read_qos_param_element(struct rtllib_qos_parameter_info
1540                                             *element_param, struct rtllib_info_element
1541                                             *info_element)
1542 {
1543         int ret = 0;
1544         u16 size = sizeof(struct rtllib_qos_parameter_info) - 2;
1545
1546         if ((info_element == NULL) || (element_param == NULL))
1547                 return -1;
1548
1549         if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
1550                 memcpy(element_param->info_element.qui, info_element->data,
1551                        info_element->len);
1552                 element_param->info_element.elementID = info_element->id;
1553                 element_param->info_element.length = info_element->len;
1554         } else
1555                 ret = -1;
1556         if (ret == 0)
1557                 ret = rtllib_verify_qos_info(&element_param->info_element,
1558                                                 QOS_OUI_PARAM_SUB_TYPE);
1559         return ret;
1560 }
1561
1562 /*
1563  * Parse a QoS information element
1564  */
1565 static int rtllib_read_qos_info_element(struct
1566                                            rtllib_qos_information_element
1567                                            *element_info, struct rtllib_info_element
1568                                            *info_element)
1569 {
1570         int ret = 0;
1571         u16 size = sizeof(struct rtllib_qos_information_element) - 2;
1572
1573         if (element_info == NULL)
1574                 return -1;
1575         if (info_element == NULL)
1576                 return -1;
1577
1578         if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
1579                 memcpy(element_info->qui, info_element->data,
1580                        info_element->len);
1581                 element_info->elementID = info_element->id;
1582                 element_info->length = info_element->len;
1583         } else
1584                 ret = -1;
1585
1586         if (ret == 0)
1587                 ret = rtllib_verify_qos_info(element_info,
1588                                                 QOS_OUI_INFO_SUB_TYPE);
1589         return ret;
1590 }
1591
1592
1593 /*
1594  * Write QoS parameters from the ac parameters.
1595  */
1596 static int rtllib_qos_convert_ac_to_parameters(struct rtllib_qos_parameter_info *param_elm,
1597                 struct rtllib_qos_data *qos_data)
1598 {
1599         struct rtllib_qos_ac_parameter *ac_params;
1600         struct rtllib_qos_parameters *qos_param = &(qos_data->parameters);
1601         int i;
1602         u8 aci;
1603         u8 acm;
1604
1605         qos_data->wmm_acm = 0;
1606         for (i = 0; i < QOS_QUEUE_NUM; i++) {
1607                 ac_params = &(param_elm->ac_params_record[i]);
1608
1609                 aci = (ac_params->aci_aifsn & 0x60) >> 5;
1610                 acm = (ac_params->aci_aifsn & 0x10) >> 4;
1611
1612                 if (aci >= QOS_QUEUE_NUM)
1613                         continue;
1614                 switch (aci) {
1615                 case 1:
1616                         /* BIT(0) | BIT(3) */
1617                         if (acm)
1618                                 qos_data->wmm_acm |= (0x01<<0)|(0x01<<3);
1619                         break;
1620                 case 2:
1621                         /* BIT(4) | BIT(5) */
1622                         if (acm)
1623                                 qos_data->wmm_acm |= (0x01<<4)|(0x01<<5);
1624                         break;
1625                 case 3:
1626                         /* BIT(6) | BIT(7) */
1627                         if (acm)
1628                                 qos_data->wmm_acm |= (0x01<<6)|(0x01<<7);
1629                         break;
1630                 case 0:
1631                 default:
1632                         /* BIT(1) | BIT(2) */
1633                         if (acm)
1634                                 qos_data->wmm_acm |= (0x01<<1)|(0x01<<2);
1635                         break;
1636                 }
1637
1638                 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
1639
1640                 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
1641                 qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2 : qos_param->aifs[aci];
1642
1643                 qos_param->cw_min[aci] = cpu_to_le16(ac_params->ecw_min_max & 0x0F);
1644
1645                 qos_param->cw_max[aci] = cpu_to_le16((ac_params->ecw_min_max & 0xF0) >> 4);
1646
1647                 qos_param->flag[aci] =
1648                     (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1649                 qos_param->tx_op_limit[aci] = ac_params->tx_op_limit;
1650         }
1651         return 0;
1652 }
1653
1654 /*
1655  * we have a generic data element which it may contain QoS information or
1656  * parameters element. check the information element length to decide
1657  * which type to read
1658  */
1659 static int rtllib_parse_qos_info_param_IE(struct rtllib_info_element
1660                                              *info_element,
1661                                              struct rtllib_network *network)
1662 {
1663         int rc = 0;
1664         struct rtllib_qos_information_element qos_info_element;
1665
1666         rc = rtllib_read_qos_info_element(&qos_info_element, info_element);
1667
1668         if (rc == 0) {
1669                 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1670                 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1671         } else {
1672                 struct rtllib_qos_parameter_info param_element;
1673
1674                 rc = rtllib_read_qos_param_element(&param_element,
1675                                                       info_element);
1676                 if (rc == 0) {
1677                         rtllib_qos_convert_ac_to_parameters(&param_element,
1678                                                                &(network->qos_data));
1679                         network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1680                         network->qos_data.param_count =
1681                             param_element.info_element.ac_info & 0x0F;
1682                 }
1683         }
1684
1685         if (rc == 0) {
1686                 RTLLIB_DEBUG_QOS("QoS is supported\n");
1687                 network->qos_data.supported = 1;
1688         }
1689         return rc;
1690 }
1691
1692 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1693
1694 static const char *get_info_element_string(u16 id)
1695 {
1696         switch (id) {
1697         MFIE_STRING(SSID);
1698         MFIE_STRING(RATES);
1699         MFIE_STRING(FH_SET);
1700         MFIE_STRING(DS_SET);
1701         MFIE_STRING(CF_SET);
1702         MFIE_STRING(TIM);
1703         MFIE_STRING(IBSS_SET);
1704         MFIE_STRING(COUNTRY);
1705         MFIE_STRING(HOP_PARAMS);
1706         MFIE_STRING(HOP_TABLE);
1707         MFIE_STRING(REQUEST);
1708         MFIE_STRING(CHALLENGE);
1709         MFIE_STRING(POWER_CONSTRAINT);
1710         MFIE_STRING(POWER_CAPABILITY);
1711         MFIE_STRING(TPC_REQUEST);
1712         MFIE_STRING(TPC_REPORT);
1713         MFIE_STRING(SUPP_CHANNELS);
1714         MFIE_STRING(CSA);
1715         MFIE_STRING(MEASURE_REQUEST);
1716         MFIE_STRING(MEASURE_REPORT);
1717         MFIE_STRING(QUIET);
1718         MFIE_STRING(IBSS_DFS);
1719         MFIE_STRING(RSN);
1720         MFIE_STRING(RATES_EX);
1721         MFIE_STRING(GENERIC);
1722         MFIE_STRING(QOS_PARAMETER);
1723         default:
1724                 return "UNKNOWN";
1725         }
1726 }
1727
1728 static inline void rtllib_extract_country_ie(
1729         struct rtllib_device *ieee,
1730         struct rtllib_info_element *info_element,
1731         struct rtllib_network *network,
1732         u8 *addr2)
1733 {
1734         if (IS_DOT11D_ENABLE(ieee)) {
1735                 if (info_element->len != 0) {
1736                         memcpy(network->CountryIeBuf, info_element->data, info_element->len);
1737                         network->CountryIeLen = info_element->len;
1738
1739                         if (!IS_COUNTRY_IE_VALID(ieee)) {
1740                                 if (rtllib_act_scanning(ieee, false) && ieee->FirstIe_InScan)
1741                                         printk(KERN_INFO "Received beacon ContryIE, SSID: <%s>\n", network->ssid);
1742                                 Dot11d_UpdateCountryIe(ieee, addr2, info_element->len, info_element->data);
1743                         }
1744                 }
1745
1746                 if (IS_EQUAL_CIE_SRC(ieee, addr2))
1747                         UPDATE_CIE_WATCHDOG(ieee);
1748         }
1749
1750 }
1751
1752 int rtllib_parse_info_param(struct rtllib_device *ieee,
1753                 struct rtllib_info_element *info_element,
1754                 u16 length,
1755                 struct rtllib_network *network,
1756                 struct rtllib_rx_stats *stats)
1757 {
1758         u8 i;
1759         short offset;
1760         u16     tmp_htcap_len = 0;
1761         u16     tmp_htinfo_len = 0;
1762         u16 ht_realtek_agg_len = 0;
1763         u8  ht_realtek_agg_buf[MAX_IE_LEN];
1764         char rates_str[64];
1765         char *p;
1766
1767         while (length >= sizeof(*info_element)) {
1768                 if (sizeof(*info_element) + info_element->len > length) {
1769                         RTLLIB_DEBUG_MGMT("Info elem: parse failed: "
1770                                              "info_element->len + 2 > left : "
1771                                              "info_element->len+2=%zd left=%d, id=%d.\n",
1772                                              info_element->len +
1773                                              sizeof(*info_element),
1774                                              length, info_element->id);
1775                         /* We stop processing but don't return an error here
1776                          * because some misbehaviour APs break this rule. ie.
1777                          * Orinoco AP1000. */
1778                         break;
1779                 }
1780
1781                 switch (info_element->id) {
1782                 case MFIE_TYPE_SSID:
1783                         if (rtllib_is_empty_essid(info_element->data,
1784                                                      info_element->len)) {
1785                                 network->flags |= NETWORK_EMPTY_ESSID;
1786                                 break;
1787                         }
1788
1789                         network->ssid_len = min(info_element->len,
1790                                                 (u8) IW_ESSID_MAX_SIZE);
1791                         memcpy(network->ssid, info_element->data, network->ssid_len);
1792                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
1793                                 memset(network->ssid + network->ssid_len, 0,
1794                                        IW_ESSID_MAX_SIZE - network->ssid_len);
1795
1796                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1797                                              network->ssid, network->ssid_len);
1798                         break;
1799
1800                 case MFIE_TYPE_RATES:
1801                         p = rates_str;
1802                         network->rates_len = min(info_element->len,
1803                                                  MAX_RATES_LENGTH);
1804                         for (i = 0; i < network->rates_len; i++) {
1805                                 network->rates[i] = info_element->data[i];
1806                                 p += snprintf(p, sizeof(rates_str) -
1807                                               (p - rates_str), "%02X ",
1808                                               network->rates[i]);
1809                                 if (rtllib_is_ofdm_rate
1810                                     (info_element->data[i])) {
1811                                         network->flags |= NETWORK_HAS_OFDM;
1812                                         if (info_element->data[i] &
1813                                             RTLLIB_BASIC_RATE_MASK)
1814                                                 network->flags &=
1815                                                     ~NETWORK_HAS_CCK;
1816                                 }
1817
1818                                 if (rtllib_is_cck_rate
1819                                     (info_element->data[i])) {
1820                                         network->flags |= NETWORK_HAS_CCK;
1821                                 }
1822                         }
1823
1824                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1825                                              rates_str, network->rates_len);
1826                         break;
1827
1828                 case MFIE_TYPE_RATES_EX:
1829                         p = rates_str;
1830                         network->rates_ex_len = min(info_element->len,
1831                                                     MAX_RATES_EX_LENGTH);
1832                         for (i = 0; i < network->rates_ex_len; i++) {
1833                                 network->rates_ex[i] = info_element->data[i];
1834                                 p += snprintf(p, sizeof(rates_str) -
1835                                               (p - rates_str), "%02X ",
1836                                               network->rates_ex[i]);
1837                                 if (rtllib_is_ofdm_rate
1838                                     (info_element->data[i])) {
1839                                         network->flags |= NETWORK_HAS_OFDM;
1840                                         if (info_element->data[i] &
1841                                             RTLLIB_BASIC_RATE_MASK)
1842                                                 network->flags &=
1843                                                     ~NETWORK_HAS_CCK;
1844                                 }
1845                         }
1846
1847                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1848                                              rates_str, network->rates_ex_len);
1849                         break;
1850
1851                 case MFIE_TYPE_DS_SET:
1852                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1853                                              info_element->data[0]);
1854                         network->channel = info_element->data[0];
1855                         break;
1856
1857                 case MFIE_TYPE_FH_SET:
1858                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1859                         break;
1860
1861                 case MFIE_TYPE_CF_SET:
1862                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1863                         break;
1864
1865                 case MFIE_TYPE_TIM:
1866                         if (info_element->len < 4)
1867                                 break;
1868
1869                         network->tim.tim_count = info_element->data[0];
1870                         network->tim.tim_period = info_element->data[1];
1871
1872                         network->dtim_period = info_element->data[1];
1873                         if (ieee->state != RTLLIB_LINKED)
1874                                 break;
1875                         network->last_dtim_sta_time = jiffies;
1876
1877                         network->dtim_data = RTLLIB_DTIM_VALID;
1878
1879
1880                         if (info_element->data[2] & 1)
1881                                 network->dtim_data |= RTLLIB_DTIM_MBCAST;
1882
1883                         offset = (info_element->data[2] >> 1)*2;
1884
1885
1886                         if (ieee->assoc_id < 8*offset ||
1887                             ieee->assoc_id > 8*(offset + info_element->len - 3))
1888                                 break;
1889
1890                         offset = (ieee->assoc_id / 8) - offset;
1891                         if (info_element->data[3 + offset] &
1892                            (1 << (ieee->assoc_id % 8)))
1893                                 network->dtim_data |= RTLLIB_DTIM_UCAST;
1894
1895                         network->listen_interval = network->dtim_period;
1896                         break;
1897
1898                 case MFIE_TYPE_ERP:
1899                         network->erp_value = info_element->data[0];
1900                         network->flags |= NETWORK_HAS_ERP_VALUE;
1901                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1902                                              network->erp_value);
1903                         break;
1904                 case MFIE_TYPE_IBSS_SET:
1905                         network->atim_window = info_element->data[0];
1906                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1907                                              network->atim_window);
1908                         break;
1909
1910                 case MFIE_TYPE_CHALLENGE:
1911                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1912                         break;
1913
1914                 case MFIE_TYPE_GENERIC:
1915                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1916                                              info_element->len);
1917                         if (!rtllib_parse_qos_info_param_IE(info_element,
1918                                                                network))
1919                                 break;
1920                         if (info_element->len >= 4 &&
1921                             info_element->data[0] == 0x00 &&
1922                             info_element->data[1] == 0x50 &&
1923                             info_element->data[2] == 0xf2 &&
1924                             info_element->data[3] == 0x01) {
1925                                 network->wpa_ie_len = min(info_element->len + 2,
1926                                                           MAX_WPA_IE_LEN);
1927                                 memcpy(network->wpa_ie, info_element,
1928                                        network->wpa_ie_len);
1929                                 break;
1930                         }
1931                         if (info_element->len == 7 &&
1932                             info_element->data[0] == 0x00 &&
1933                             info_element->data[1] == 0xe0 &&
1934                             info_element->data[2] == 0x4c &&
1935                             info_element->data[3] == 0x01 &&
1936                             info_element->data[4] == 0x02)
1937                                 network->Turbo_Enable = 1;
1938
1939                         if (tmp_htcap_len == 0) {
1940                                 if (info_element->len >= 4 &&
1941                                    info_element->data[0] == 0x00 &&
1942                                    info_element->data[1] == 0x90 &&
1943                                    info_element->data[2] == 0x4c &&
1944                                    info_element->data[3] == 0x033) {
1945
1946                                                 tmp_htcap_len = min(info_element->len, (u8)MAX_IE_LEN);
1947                                                 if (tmp_htcap_len != 0) {
1948                                                         network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1949                                                         network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ?
1950                                                                 sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len;
1951                                                         memcpy(network->bssht.bdHTCapBuf, info_element->data, network->bssht.bdHTCapLen);
1952                                                 }
1953                                 }
1954                                 if (tmp_htcap_len != 0) {
1955                                         network->bssht.bdSupportHT = true;
1956                                         network->bssht.bdHT1R = ((((struct ht_capab_ele *)(network->bssht.bdHTCapBuf))->MCS[1]) == 0);
1957                                 } else {
1958                                         network->bssht.bdSupportHT = false;
1959                                         network->bssht.bdHT1R = false;
1960                                 }
1961                         }
1962
1963
1964                         if (tmp_htinfo_len == 0) {
1965                                 if (info_element->len >= 4 &&
1966                                     info_element->data[0] == 0x00 &&
1967                                     info_element->data[1] == 0x90 &&
1968                                     info_element->data[2] == 0x4c &&
1969                                     info_element->data[3] == 0x034) {
1970                                         tmp_htinfo_len = min(info_element->len, (u8)MAX_IE_LEN);
1971                                         if (tmp_htinfo_len != 0) {
1972                                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1973                                                 if (tmp_htinfo_len) {
1974                                                         network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf) ?
1975                                                                 sizeof(network->bssht.bdHTInfoBuf) : tmp_htinfo_len;
1976                                                         memcpy(network->bssht.bdHTInfoBuf, info_element->data, network->bssht.bdHTInfoLen);
1977                                                 }
1978
1979                                         }
1980
1981                                 }
1982                         }
1983
1984                         if (ieee->aggregation) {
1985                                 if (network->bssht.bdSupportHT) {
1986                                         if (info_element->len >= 4 &&
1987                                             info_element->data[0] == 0x00 &&
1988                                             info_element->data[1] == 0xe0 &&
1989                                             info_element->data[2] == 0x4c &&
1990                                             info_element->data[3] == 0x02) {
1991                                                 ht_realtek_agg_len = min(info_element->len, (u8)MAX_IE_LEN);
1992                                                 memcpy(ht_realtek_agg_buf, info_element->data, info_element->len);
1993                                         }
1994                                         if (ht_realtek_agg_len >= 5) {
1995                                                 network->realtek_cap_exit = true;
1996                                                 network->bssht.bdRT2RTAggregation = true;
1997
1998                                                 if ((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02))
1999                                                         network->bssht.bdRT2RTLongSlotTime = true;
2000
2001                                                 if ((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & RT_HT_CAP_USE_92SE))
2002                                                         network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_92SE;
2003                                         }
2004                                 }
2005                                 if (ht_realtek_agg_len >= 5) {
2006                                         if ((ht_realtek_agg_buf[5] & RT_HT_CAP_USE_SOFTAP))
2007                                                 network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_SOFTAP;
2008                                 }
2009                         }
2010
2011                         if ((info_element->len >= 3 &&
2012                              info_element->data[0] == 0x00 &&
2013                              info_element->data[1] == 0x05 &&
2014                              info_element->data[2] == 0xb5) ||
2015                              (info_element->len >= 3 &&
2016                              info_element->data[0] == 0x00 &&
2017                              info_element->data[1] == 0x0a &&
2018                              info_element->data[2] == 0xf7) ||
2019                              (info_element->len >= 3 &&
2020                              info_element->data[0] == 0x00 &&
2021                              info_element->data[1] == 0x10 &&
2022                              info_element->data[2] == 0x18)) {
2023                                 network->broadcom_cap_exist = true;
2024                         }
2025                         if (info_element->len >= 3 &&
2026                             info_element->data[0] == 0x00 &&
2027                             info_element->data[1] == 0x0c &&
2028                             info_element->data[2] == 0x43)
2029                                 network->ralink_cap_exist = true;
2030                         if ((info_element->len >= 3 &&
2031                              info_element->data[0] == 0x00 &&
2032                              info_element->data[1] == 0x03 &&
2033                              info_element->data[2] == 0x7f) ||
2034                              (info_element->len >= 3 &&
2035                              info_element->data[0] == 0x00 &&
2036                              info_element->data[1] == 0x13 &&
2037                              info_element->data[2] == 0x74))
2038                                 network->atheros_cap_exist = true;
2039
2040                         if ((info_element->len >= 3 &&
2041                              info_element->data[0] == 0x00 &&
2042                              info_element->data[1] == 0x50 &&
2043                              info_element->data[2] == 0x43))
2044                                 network->marvell_cap_exist = true;
2045                         if (info_element->len >= 3 &&
2046                             info_element->data[0] == 0x00 &&
2047                             info_element->data[1] == 0x40 &&
2048                             info_element->data[2] == 0x96)
2049                                 network->cisco_cap_exist = true;
2050
2051
2052                         if (info_element->len >= 3 &&
2053                             info_element->data[0] == 0x00 &&
2054                             info_element->data[1] == 0x0a &&
2055                             info_element->data[2] == 0xf5)
2056                                 network->airgo_cap_exist = true;
2057
2058                         if (info_element->len > 4 &&
2059                             info_element->data[0] == 0x00 &&
2060                             info_element->data[1] == 0x40 &&
2061                             info_element->data[2] == 0x96 &&
2062                             info_element->data[3] == 0x01) {
2063                                 if (info_element->len == 6) {
2064                                         memcpy(network->CcxRmState, &info_element[4], 2);
2065                                         if (network->CcxRmState[0] != 0)
2066                                                 network->bCcxRmEnable = true;
2067                                         else
2068                                                 network->bCcxRmEnable = false;
2069                                         network->MBssidMask = network->CcxRmState[1] & 0x07;
2070                                         if (network->MBssidMask != 0) {
2071                                                 network->bMBssidValid = true;
2072                                                 network->MBssidMask = 0xff << (network->MBssidMask);
2073                                                 memcpy(network->MBssid, network->bssid, ETH_ALEN);
2074                                                 network->MBssid[5] &= network->MBssidMask;
2075                                         } else {
2076                                                 network->bMBssidValid = false;
2077                                         }
2078                                 } else {
2079                                         network->bCcxRmEnable = false;
2080                                 }
2081                         }
2082                         if (info_element->len > 4  &&
2083                             info_element->data[0] == 0x00 &&
2084                             info_element->data[1] == 0x40 &&
2085                             info_element->data[2] == 0x96 &&
2086                             info_element->data[3] == 0x03) {
2087                                 if (info_element->len == 5) {
2088                                         network->bWithCcxVerNum = true;
2089                                         network->BssCcxVerNumber = info_element->data[4];
2090                                 } else {
2091                                         network->bWithCcxVerNum = false;
2092                                         network->BssCcxVerNumber = 0;
2093                                 }
2094                         }
2095                         if (info_element->len > 4  &&
2096                             info_element->data[0] == 0x00 &&
2097                             info_element->data[1] == 0x50 &&
2098                             info_element->data[2] == 0xf2 &&
2099                             info_element->data[3] == 0x04) {
2100                                 RTLLIB_DEBUG_MGMT("MFIE_TYPE_WZC: %d bytes\n",
2101                                                      info_element->len);
2102                                 network->wzc_ie_len = min(info_element->len+2,
2103                                                           MAX_WZC_IE_LEN);
2104                                 memcpy(network->wzc_ie, info_element,
2105                                                 network->wzc_ie_len);
2106                         }
2107                         break;
2108
2109                 case MFIE_TYPE_RSN:
2110                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
2111                                              info_element->len);
2112                         network->rsn_ie_len = min(info_element->len + 2,
2113                                                   MAX_WPA_IE_LEN);
2114                         memcpy(network->rsn_ie, info_element,
2115                                network->rsn_ie_len);
2116                         break;
2117
2118                 case MFIE_TYPE_HT_CAP:
2119                         RTLLIB_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n",
2120                                              info_element->len);
2121                         tmp_htcap_len = min(info_element->len, (u8)MAX_IE_LEN);
2122                         if (tmp_htcap_len != 0) {
2123                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
2124                                 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ?
2125                                         sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len;
2126                                 memcpy(network->bssht.bdHTCapBuf,
2127                                        info_element->data,
2128                                        network->bssht.bdHTCapLen);
2129
2130                                 network->bssht.bdSupportHT = true;
2131                                 network->bssht.bdHT1R = ((((struct ht_capab_ele *)
2132                                                         network->bssht.bdHTCapBuf))->MCS[1]) == 0;
2133
2134                                 network->bssht.bdBandWidth = (enum ht_channel_width)
2135                                                              (((struct ht_capab_ele *)
2136                                                              (network->bssht.bdHTCapBuf))->ChlWidth);
2137                         } else {
2138                                 network->bssht.bdSupportHT = false;
2139                                 network->bssht.bdHT1R = false;
2140                                 network->bssht.bdBandWidth = HT_CHANNEL_WIDTH_20;
2141                         }
2142                         break;
2143
2144
2145                 case MFIE_TYPE_HT_INFO:
2146                         RTLLIB_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n",
2147                                              info_element->len);
2148                         tmp_htinfo_len = min(info_element->len, (u8)MAX_IE_LEN);
2149                         if (tmp_htinfo_len) {
2150                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
2151                                 network->bssht.bdHTInfoLen = tmp_htinfo_len >
2152                                         sizeof(network->bssht.bdHTInfoBuf) ?
2153                                         sizeof(network->bssht.bdHTInfoBuf) :
2154                                         tmp_htinfo_len;
2155                                 memcpy(network->bssht.bdHTInfoBuf,
2156                                        info_element->data,
2157                                        network->bssht.bdHTInfoLen);
2158                         }
2159                         break;
2160
2161                 case MFIE_TYPE_AIRONET:
2162                         RTLLIB_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n",
2163                                              info_element->len);
2164                         if (info_element->len > IE_CISCO_FLAG_POSITION) {
2165                                 network->bWithAironetIE = true;
2166
2167                                 if ((info_element->data[IE_CISCO_FLAG_POSITION]
2168                                      & SUPPORT_CKIP_MIC) ||
2169                                      (info_element->data[IE_CISCO_FLAG_POSITION]
2170                                      & SUPPORT_CKIP_PK))
2171                                         network->bCkipSupported = true;
2172                                 else
2173                                         network->bCkipSupported = false;
2174                         } else {
2175                                 network->bWithAironetIE = false;
2176                                 network->bCkipSupported = false;
2177                         }
2178                         break;
2179                 case MFIE_TYPE_QOS_PARAMETER:
2180                         printk(KERN_ERR
2181                                "QoS Error need to parse QOS_PARAMETER IE\n");
2182                         break;
2183
2184                 case MFIE_TYPE_COUNTRY:
2185                         RTLLIB_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
2186                                              info_element->len);
2187                         rtllib_extract_country_ie(ieee, info_element, network,
2188                                                   network->bssid);
2189                         break;
2190 /* TODO */
2191                 default:
2192                         RTLLIB_DEBUG_MGMT
2193                             ("Unsupported info element: %s (%d)\n",
2194                              get_info_element_string(info_element->id),
2195                              info_element->id);
2196                         break;
2197                 }
2198
2199                 length -= sizeof(*info_element) + info_element->len;
2200                 info_element =
2201                     (struct rtllib_info_element *)&info_element->
2202                     data[info_element->len];
2203         }
2204
2205         if (!network->atheros_cap_exist && !network->broadcom_cap_exist &&
2206             !network->cisco_cap_exist && !network->ralink_cap_exist &&
2207             !network->bssht.bdRT2RTAggregation)
2208                 network->unknown_cap_exist = true;
2209         else
2210                 network->unknown_cap_exist = false;
2211         return 0;
2212 }
2213
2214 static inline u8 rtllib_SignalStrengthTranslate(u8  CurrSS)
2215 {
2216         u8 RetSS;
2217
2218         if (CurrSS >= 71 && CurrSS <= 100)
2219                 RetSS = 90 + ((CurrSS - 70) / 3);
2220         else if (CurrSS >= 41 && CurrSS <= 70)
2221                 RetSS = 78 + ((CurrSS - 40) / 3);
2222         else if (CurrSS >= 31 && CurrSS <= 40)
2223                 RetSS = 66 + (CurrSS - 30);
2224         else if (CurrSS >= 21 && CurrSS <= 30)
2225                 RetSS = 54 + (CurrSS - 20);
2226         else if (CurrSS >= 5 && CurrSS <= 20)
2227                 RetSS = 42 + (((CurrSS - 5) * 2) / 3);
2228         else if (CurrSS == 4)
2229                 RetSS = 36;
2230         else if (CurrSS == 3)
2231                 RetSS = 27;
2232         else if (CurrSS == 2)
2233                 RetSS = 18;
2234         else if (CurrSS == 1)
2235                 RetSS = 9;
2236         else
2237                 RetSS = CurrSS;
2238
2239         return RetSS;
2240 }
2241
2242 static long rtllib_translate_todbm(u8 signal_strength_index)
2243 {
2244         long    signal_power;
2245
2246         signal_power = (long)((signal_strength_index + 1) >> 1);
2247         signal_power -= 95;
2248
2249         return signal_power;
2250 }
2251
2252 static inline int rtllib_network_init(
2253         struct rtllib_device *ieee,
2254         struct rtllib_probe_response *beacon,
2255         struct rtllib_network *network,
2256         struct rtllib_rx_stats *stats)
2257 {
2258
2259         /*
2260         network->qos_data.active = 0;
2261         network->qos_data.supported = 0;
2262         network->qos_data.param_count = 0;
2263         network->qos_data.old_param_count = 0;
2264         */
2265         memset(&network->qos_data, 0, sizeof(struct rtllib_qos_data));
2266
2267         /* Pull out fixed field data */
2268         memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
2269         network->capability = le16_to_cpu(beacon->capability);
2270         network->last_scanned = jiffies;
2271         network->time_stamp[0] = beacon->time_stamp[0];
2272         network->time_stamp[1] = beacon->time_stamp[1];
2273         network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
2274         /* Where to pull this? beacon->listen_interval;*/
2275         network->listen_interval = 0x0A;
2276         network->rates_len = network->rates_ex_len = 0;
2277         network->last_associate = 0;
2278         network->ssid_len = 0;
2279         network->hidden_ssid_len = 0;
2280         memset(network->hidden_ssid, 0, sizeof(network->hidden_ssid));
2281         network->flags = 0;
2282         network->atim_window = 0;
2283         network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
2284             0x3 : 0x0;
2285         network->berp_info_valid = false;
2286         network->broadcom_cap_exist = false;
2287         network->ralink_cap_exist = false;
2288         network->atheros_cap_exist = false;
2289         network->cisco_cap_exist = false;
2290         network->unknown_cap_exist = false;
2291         network->realtek_cap_exit = false;
2292         network->marvell_cap_exist = false;
2293         network->airgo_cap_exist = false;
2294         network->Turbo_Enable = 0;
2295         network->SignalStrength = stats->SignalStrength;
2296         network->RSSI = stats->SignalStrength;
2297         network->CountryIeLen = 0;
2298         memset(network->CountryIeBuf, 0, MAX_IE_LEN);
2299         HTInitializeBssDesc(&network->bssht);
2300         if (stats->freq == RTLLIB_52GHZ_BAND) {
2301                 /* for A band (No DS info) */
2302                 network->channel = stats->received_channel;
2303         } else
2304                 network->flags |= NETWORK_HAS_CCK;
2305
2306         network->wpa_ie_len = 0;
2307         network->rsn_ie_len = 0;
2308         network->wzc_ie_len = 0;
2309
2310         if (rtllib_parse_info_param(ieee,
2311                         beacon->info_element,
2312                         (stats->len - sizeof(*beacon)),
2313                         network,
2314                         stats))
2315                 return 1;
2316
2317         network->mode = 0;
2318         if (stats->freq == RTLLIB_52GHZ_BAND)
2319                 network->mode = IEEE_A;
2320         else {
2321                 if (network->flags & NETWORK_HAS_OFDM)
2322                         network->mode |= IEEE_G;
2323                 if (network->flags & NETWORK_HAS_CCK)
2324                         network->mode |= IEEE_B;
2325         }
2326
2327         if (network->mode == 0) {
2328                 RTLLIB_DEBUG_SCAN("Filtered out '%s (%pM)' "
2329                                      "network.\n",
2330                                      escape_essid(network->ssid,
2331                                                   network->ssid_len),
2332                                      network->bssid);
2333                 return 1;
2334         }
2335
2336         if (network->bssht.bdSupportHT) {
2337                 if (network->mode == IEEE_A)
2338                         network->mode = IEEE_N_5G;
2339                 else if (network->mode & (IEEE_G | IEEE_B))
2340                         network->mode = IEEE_N_24G;
2341         }
2342         if (rtllib_is_empty_essid(network->ssid, network->ssid_len))
2343                 network->flags |= NETWORK_EMPTY_ESSID;
2344         stats->signal = 30 + (stats->SignalStrength * 70) / 100;
2345         stats->noise = rtllib_translate_todbm((u8)(100-stats->signal)) - 25;
2346
2347         memcpy(&network->stats, stats, sizeof(network->stats));
2348
2349         return 0;
2350 }
2351
2352 static inline int is_same_network(struct rtllib_network *src,
2353                                   struct rtllib_network *dst, u8 ssidbroad)
2354 {
2355         /* A network is only a duplicate if the channel, BSSID, ESSID
2356          * and the capability field (in particular IBSS and BSS) all match.
2357          * We treat all <hidden> with the same BSSID and channel
2358          * as one network */
2359         return (((src->ssid_len == dst->ssid_len) || (!ssidbroad)) &&
2360                 (src->channel == dst->channel) &&
2361                 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
2362                 (!memcmp(src->ssid, dst->ssid, src->ssid_len) ||
2363                 (!ssidbroad)) &&
2364                 ((src->capability & WLAN_CAPABILITY_IBSS) ==
2365                 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
2366                 ((src->capability & WLAN_CAPABILITY_ESS) ==
2367                 (dst->capability & WLAN_CAPABILITY_ESS)));
2368 }
2369
2370 static inline void update_ibss_network(struct rtllib_network *dst,
2371                                   struct rtllib_network *src)
2372 {
2373         memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats));
2374         dst->last_scanned = jiffies;
2375 }
2376
2377
2378 static inline void update_network(struct rtllib_network *dst,
2379                                   struct rtllib_network *src)
2380 {
2381         int qos_active;
2382         u8 old_param;
2383
2384         memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats));
2385         dst->capability = src->capability;
2386         memcpy(dst->rates, src->rates, src->rates_len);
2387         dst->rates_len = src->rates_len;
2388         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
2389         dst->rates_ex_len = src->rates_ex_len;
2390         if (src->ssid_len > 0) {
2391                 if (dst->ssid_len == 0) {
2392                         memset(dst->hidden_ssid, 0, sizeof(dst->hidden_ssid));
2393                         dst->hidden_ssid_len = src->ssid_len;
2394                         memcpy(dst->hidden_ssid, src->ssid, src->ssid_len);
2395                 } else {
2396                         memset(dst->ssid, 0, dst->ssid_len);
2397                         dst->ssid_len = src->ssid_len;
2398                         memcpy(dst->ssid, src->ssid, src->ssid_len);
2399                 }
2400         }
2401         dst->mode = src->mode;
2402         dst->flags = src->flags;
2403         dst->time_stamp[0] = src->time_stamp[0];
2404         dst->time_stamp[1] = src->time_stamp[1];
2405         if (src->flags & NETWORK_HAS_ERP_VALUE) {
2406                 dst->erp_value = src->erp_value;
2407                 dst->berp_info_valid = src->berp_info_valid = true;
2408         }
2409         dst->beacon_interval = src->beacon_interval;
2410         dst->listen_interval = src->listen_interval;
2411         dst->atim_window = src->atim_window;
2412         dst->dtim_period = src->dtim_period;
2413         dst->dtim_data = src->dtim_data;
2414         dst->last_dtim_sta_time = src->last_dtim_sta_time;
2415         memcpy(&dst->tim, &src->tim, sizeof(struct rtllib_tim_parameters));
2416
2417         dst->bssht.bdSupportHT = src->bssht.bdSupportHT;
2418         dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation;
2419         dst->bssht.bdHTCapLen = src->bssht.bdHTCapLen;
2420         memcpy(dst->bssht.bdHTCapBuf, src->bssht.bdHTCapBuf,
2421                src->bssht.bdHTCapLen);
2422         dst->bssht.bdHTInfoLen = src->bssht.bdHTInfoLen;
2423         memcpy(dst->bssht.bdHTInfoBuf, src->bssht.bdHTInfoBuf,
2424                src->bssht.bdHTInfoLen);
2425         dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer;
2426         dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime;
2427         dst->broadcom_cap_exist = src->broadcom_cap_exist;
2428         dst->ralink_cap_exist = src->ralink_cap_exist;
2429         dst->atheros_cap_exist = src->atheros_cap_exist;
2430         dst->realtek_cap_exit = src->realtek_cap_exit;
2431         dst->marvell_cap_exist = src->marvell_cap_exist;
2432         dst->cisco_cap_exist = src->cisco_cap_exist;
2433         dst->airgo_cap_exist = src->airgo_cap_exist;
2434         dst->unknown_cap_exist = src->unknown_cap_exist;
2435         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
2436         dst->wpa_ie_len = src->wpa_ie_len;
2437         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
2438         dst->rsn_ie_len = src->rsn_ie_len;
2439         memcpy(dst->wzc_ie, src->wzc_ie, src->wzc_ie_len);
2440         dst->wzc_ie_len = src->wzc_ie_len;
2441
2442         dst->last_scanned = jiffies;
2443         /* qos related parameters */
2444         qos_active = dst->qos_data.active;
2445         old_param = dst->qos_data.param_count;
2446         dst->qos_data.supported = src->qos_data.supported;
2447         if (dst->flags & NETWORK_HAS_QOS_PARAMETERS)
2448                 memcpy(&dst->qos_data, &src->qos_data,
2449                        sizeof(struct rtllib_qos_data));
2450         if (dst->qos_data.supported == 1) {
2451                 if (dst->ssid_len)
2452                         RTLLIB_DEBUG_QOS
2453                                 ("QoS the network %s is QoS supported\n",
2454                                 dst->ssid);
2455                 else
2456                         RTLLIB_DEBUG_QOS
2457                                 ("QoS the network is QoS supported\n");
2458         }
2459         dst->qos_data.active = qos_active;
2460         dst->qos_data.old_param_count = old_param;
2461
2462         /* dst->last_associate is not overwritten */
2463         dst->wmm_info = src->wmm_info;
2464         if (src->wmm_param[0].ac_aci_acm_aifsn ||
2465            src->wmm_param[1].ac_aci_acm_aifsn ||
2466            src->wmm_param[2].ac_aci_acm_aifsn ||
2467            src->wmm_param[3].ac_aci_acm_aifsn)
2468                 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
2469
2470         dst->SignalStrength = src->SignalStrength;
2471         dst->RSSI = src->RSSI;
2472         dst->Turbo_Enable = src->Turbo_Enable;
2473
2474         dst->CountryIeLen = src->CountryIeLen;
2475         memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
2476
2477         dst->bWithAironetIE = src->bWithAironetIE;
2478         dst->bCkipSupported = src->bCkipSupported;
2479         memcpy(dst->CcxRmState, src->CcxRmState, 2);
2480         dst->bCcxRmEnable = src->bCcxRmEnable;
2481         dst->MBssidMask = src->MBssidMask;
2482         dst->bMBssidValid = src->bMBssidValid;
2483         memcpy(dst->MBssid, src->MBssid, 6);
2484         dst->bWithCcxVerNum = src->bWithCcxVerNum;
2485         dst->BssCcxVerNumber = src->BssCcxVerNumber;
2486 }
2487
2488 static inline int is_beacon(__le16 fc)
2489 {
2490         return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == RTLLIB_STYPE_BEACON);
2491 }
2492
2493 static int IsPassiveChannel(struct rtllib_device *rtllib, u8 channel)
2494 {
2495         if (MAX_CHANNEL_NUMBER < channel) {
2496                 printk(KERN_INFO "%s(): Invalid Channel\n", __func__);
2497                 return 0;
2498         }
2499
2500         if (rtllib->active_channel_map[channel] == 2)
2501                 return 1;
2502
2503         return 0;
2504 }
2505
2506 int rtllib_legal_channel(struct rtllib_device *rtllib, u8 channel)
2507 {
2508         if (MAX_CHANNEL_NUMBER < channel) {
2509                 printk(KERN_INFO "%s(): Invalid Channel\n", __func__);
2510                 return 0;
2511         }
2512         if (rtllib->active_channel_map[channel] > 0)
2513                 return 1;
2514
2515         return 0;
2516 }
2517 EXPORT_SYMBOL(rtllib_legal_channel);
2518
2519 static inline void rtllib_process_probe_response(
2520         struct rtllib_device *ieee,
2521         struct rtllib_probe_response *beacon,
2522         struct rtllib_rx_stats *stats)
2523 {
2524         struct rtllib_network *target;
2525         struct rtllib_network *oldest = NULL;
2526         struct rtllib_info_element *info_element = &beacon->info_element[0];
2527         unsigned long flags;
2528         short renew;
2529         struct rtllib_network *network = kzalloc(sizeof(struct rtllib_network),
2530                                                  GFP_ATOMIC);
2531
2532         if (!network)
2533                 return;
2534
2535         RTLLIB_DEBUG_SCAN(
2536                 "'%s' ( %pM ): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
2537                 escape_essid(info_element->data, info_element->len),
2538                 beacon->header.addr3,
2539                 (le16_to_cpu(beacon->capability) & (1<<0xf)) ? '1' : '0',
2540                 (le16_to_cpu(beacon->capability) & (1<<0xe)) ? '1' : '0',
2541                 (le16_to_cpu(beacon->capability) & (1<<0xd)) ? '1' : '0',
2542                 (le16_to_cpu(beacon->capability) & (1<<0xc)) ? '1' : '0',
2543                 (le16_to_cpu(beacon->capability) & (1<<0xb)) ? '1' : '0',
2544                 (le16_to_cpu(beacon->capability) & (1<<0xa)) ? '1' : '0',
2545                 (le16_to_cpu(beacon->capability) & (1<<0x9)) ? '1' : '0',
2546                 (le16_to_cpu(beacon->capability) & (1<<0x8)) ? '1' : '0',
2547                 (le16_to_cpu(beacon->capability) & (1<<0x7)) ? '1' : '0',
2548                 (le16_to_cpu(beacon->capability) & (1<<0x6)) ? '1' : '0',
2549                 (le16_to_cpu(beacon->capability) & (1<<0x5)) ? '1' : '0',
2550                 (le16_to_cpu(beacon->capability) & (1<<0x4)) ? '1' : '0',
2551                 (le16_to_cpu(beacon->capability) & (1<<0x3)) ? '1' : '0',
2552                 (le16_to_cpu(beacon->capability) & (1<<0x2)) ? '1' : '0',
2553                 (le16_to_cpu(beacon->capability) & (1<<0x1)) ? '1' : '0',
2554                 (le16_to_cpu(beacon->capability) & (1<<0x0)) ? '1' : '0');
2555
2556         if (rtllib_network_init(ieee, beacon, network, stats)) {
2557                 RTLLIB_DEBUG_SCAN("Dropped '%s' ( %pM) via %s.\n",
2558                                   escape_essid(info_element->data,
2559                                   info_element->len),
2560                                   beacon->header.addr3,
2561                                   WLAN_FC_GET_STYPE(
2562                                           le16_to_cpu(beacon->header.frame_ctl)) ==
2563                                   RTLLIB_STYPE_PROBE_RESP ?
2564                                   "PROBE RESPONSE" : "BEACON");
2565                 goto free_network;
2566         }
2567
2568
2569         if (!rtllib_legal_channel(ieee, network->channel))
2570                 goto free_network;
2571
2572         if (WLAN_FC_GET_STYPE(le16_to_cpu(beacon->header.frame_ctl)) ==
2573             RTLLIB_STYPE_PROBE_RESP) {
2574                 if (IsPassiveChannel(ieee, network->channel)) {
2575                         printk(KERN_INFO "GetScanInfo(): For Global Domain, "
2576                                "filter probe response at channel(%d).\n",
2577                                network->channel);
2578                         goto free_network;
2579                 }
2580         }
2581
2582         /* The network parsed correctly -- so now we scan our known networks
2583          * to see if we can find it in our list.
2584          *
2585          * NOTE:  This search is definitely not optimized.  Once its doing
2586          *      the "right thing" we'll optimize it for efficiency if
2587          *      necessary */
2588
2589         /* Search for this entry in the list and update it if it is
2590          * already there. */
2591
2592         spin_lock_irqsave(&ieee->lock, flags);
2593         if (is_same_network(&ieee->current_network, network,
2594            (network->ssid_len ? 1 : 0))) {
2595                 update_network(&ieee->current_network, network);
2596                 if ((ieee->current_network.mode == IEEE_N_24G ||
2597                      ieee->current_network.mode == IEEE_G)
2598                      && ieee->current_network.berp_info_valid) {
2599                         if (ieee->current_network.erp_value & ERP_UseProtection)
2600                                 ieee->current_network.buseprotection = true;
2601                         else
2602                                 ieee->current_network.buseprotection = false;
2603                 }
2604                 if (is_beacon(beacon->header.frame_ctl)) {
2605                         if (ieee->state >= RTLLIB_LINKED)
2606                                 ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
2607                 }
2608         }
2609         list_for_each_entry(target, &ieee->network_list, list) {
2610                 if (is_same_network(target, network,
2611                    (target->ssid_len ? 1 : 0)))
2612                         break;
2613                 if ((oldest == NULL) ||
2614                     (target->last_scanned < oldest->last_scanned))
2615                         oldest = target;
2616         }
2617
2618         /* If we didn't find a match, then get a new network slot to initialize
2619          * with this beacon's information */
2620         if (&target->list == &ieee->network_list) {
2621                 if (list_empty(&ieee->network_free_list)) {
2622                         /* If there are no more slots, expire the oldest */
2623                         list_del(&oldest->list);
2624                         target = oldest;
2625                         RTLLIB_DEBUG_SCAN("Expired '%s' ( %pM) from "
2626                                              "network list.\n",
2627                                              escape_essid(target->ssid,
2628                                                           target->ssid_len),
2629                                              target->bssid);
2630                 } else {
2631                         /* Otherwise just pull from the free list */
2632                         target = list_entry(ieee->network_free_list.next,
2633                                             struct rtllib_network, list);
2634                         list_del(ieee->network_free_list.next);
2635                 }
2636
2637
2638                 RTLLIB_DEBUG_SCAN("Adding '%s' ( %pM) via %s.\n",
2639                                   escape_essid(network->ssid,
2640                                   network->ssid_len), network->bssid,
2641                                   WLAN_FC_GET_STYPE(
2642                                           le16_to_cpu(beacon->header.frame_ctl)) ==
2643                                   RTLLIB_STYPE_PROBE_RESP ?
2644                                   "PROBE RESPONSE" : "BEACON");
2645                 memcpy(target, network, sizeof(*target));
2646                 list_add_tail(&target->list, &ieee->network_list);
2647                 if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
2648                         rtllib_softmac_new_net(ieee, network);
2649         } else {
2650                 RTLLIB_DEBUG_SCAN("Updating '%s' ( %pM) via %s.\n",
2651                                   escape_essid(target->ssid,
2652                                   target->ssid_len), target->bssid,
2653                                   WLAN_FC_GET_STYPE(
2654                                           le16_to_cpu(beacon->header.frame_ctl)) ==
2655                                   RTLLIB_STYPE_PROBE_RESP ?
2656                                   "PROBE RESPONSE" : "BEACON");
2657
2658                 /* we have an entry and we are going to update it. But this
2659                  *  entry may be already expired. In this case we do the same
2660                  * as we found a new net and call the new_net handler
2661                  */
2662                 renew = !time_after(target->last_scanned + ieee->scan_age,
2663                                     jiffies);
2664                 if ((!target->ssid_len) &&
2665                     (((network->ssid_len > 0) && (target->hidden_ssid_len == 0))
2666                     || ((ieee->current_network.ssid_len == network->ssid_len) &&
2667                     (strncmp(ieee->current_network.ssid, network->ssid,
2668                     network->ssid_len) == 0) &&
2669                     (ieee->state == RTLLIB_NOLINK))))
2670                         renew = 1;
2671                 update_network(target, network);
2672                 if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
2673                         rtllib_softmac_new_net(ieee, network);
2674         }
2675
2676         spin_unlock_irqrestore(&ieee->lock, flags);
2677         if (is_beacon(beacon->header.frame_ctl) &&
2678             is_same_network(&ieee->current_network, network,
2679             (network->ssid_len ? 1 : 0)) &&
2680             (ieee->state == RTLLIB_LINKED)) {
2681                 if (ieee->handle_beacon != NULL)
2682                         ieee->handle_beacon(ieee->dev, beacon,
2683                                             &ieee->current_network);
2684         }
2685 free_network:
2686         kfree(network);
2687         return;
2688 }
2689
2690 void rtllib_rx_mgt(struct rtllib_device *ieee,
2691                       struct sk_buff *skb,
2692                       struct rtllib_rx_stats *stats)
2693 {
2694         struct rtllib_hdr_4addr *header = (struct rtllib_hdr_4addr *)skb->data ;
2695
2696         if ((WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) !=
2697             RTLLIB_STYPE_PROBE_RESP) &&
2698             (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) !=
2699             RTLLIB_STYPE_BEACON))
2700                 ieee->last_rx_ps_time = jiffies;
2701
2702         switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
2703
2704         case RTLLIB_STYPE_BEACON:
2705                 RTLLIB_DEBUG_MGMT("received BEACON (%d)\n",
2706                                   WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2707                 RTLLIB_DEBUG_SCAN("Beacon\n");
2708                 rtllib_process_probe_response(
2709                                 ieee, (struct rtllib_probe_response *)header,
2710                                 stats);
2711
2712                 if (ieee->sta_sleep || (ieee->ps != RTLLIB_PS_DISABLED &&
2713                     ieee->iw_mode == IW_MODE_INFRA &&
2714                     ieee->state == RTLLIB_LINKED))
2715                         tasklet_schedule(&ieee->ps_task);
2716
2717                 break;
2718
2719         case RTLLIB_STYPE_PROBE_RESP:
2720                 RTLLIB_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
2721                         WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2722                 RTLLIB_DEBUG_SCAN("Probe response\n");
2723                 rtllib_process_probe_response(ieee,
2724                               (struct rtllib_probe_response *)header, stats);
2725                 break;
2726         case RTLLIB_STYPE_PROBE_REQ:
2727                 RTLLIB_DEBUG_MGMT("received PROBE RESQUEST (%d)\n",
2728                                   WLAN_FC_GET_STYPE(
2729                                           le16_to_cpu(header->frame_ctl)));
2730                 RTLLIB_DEBUG_SCAN("Probe request\n");
2731                 if ((ieee->softmac_features & IEEE_SOFTMAC_PROBERS) &&
2732                     ((ieee->iw_mode == IW_MODE_ADHOC ||
2733                     ieee->iw_mode == IW_MODE_MASTER) &&
2734                     ieee->state == RTLLIB_LINKED))
2735                         rtllib_rx_probe_rq(ieee, skb);
2736                 break;
2737         }
2738 }