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 <andreamrl@tiscali.it>
  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/version.h>
  40 #include <linux/wireless.h>
  41 #include <linux/etherdevice.h>
  42 #include <asm/uaccess.h>
  43 #include <linux/ctype.h>
  44
  45 #include "rtllib.h"
  46 #include "dot11d.h"
  47
  48 static inline void rtllib_monitor_rx(struct rtllib_device *ieee,
  49                                 struct sk_buff *skb,struct rtllib_rx_stats *rx_status,
  50                                 size_t hdr_length)
  51 {
  52         skb->dev = ieee->dev;
  53         skb_reset_mac_header(skb);
  54         skb_pull(skb, hdr_length);
  55         skb->pkt_type = PACKET_OTHERHOST;
  56         skb->protocol = __constant_htons(ETH_P_80211_RAW);
  57         memset(skb->cb, 0, sizeof(skb->cb));
  58         netif_rx(skb);
  59 }
  60
  61 /* Called only as a tasklet (software IRQ) */
  62 static struct rtllib_frag_entry *
  63 rtllib_frag_cache_find(struct rtllib_device *ieee, unsigned int seq,
  64                           unsigned int frag, u8 tid,u8 *src, u8 *dst)
  65 {
  66         struct rtllib_frag_entry *entry;
  67         int i;
  68
  69         for (i = 0; i < RTLLIB_FRAG_CACHE_LEN; i++) {
  70                 entry = &ieee->frag_cache[tid][i];
  71                 if (entry->skb != NULL &&
  72                     time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
  73                         RTLLIB_DEBUG_FRAG(
  74                                 "expiring fragment cache entry "
  75                                 "seq=%u last_frag=%u\n",
  76                                 entry->seq, entry->last_frag);
  77                         dev_kfree_skb_any(entry->skb);
  78                         entry->skb = NULL;
  79                 }
  80
  81                 if (entry->skb != NULL && entry->seq == seq &&
  82                     (entry->last_frag + 1 == frag || frag == -1) &&
  83                     memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
  84                     memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
  85                         return entry;
  86         }
  87
  88         return NULL;
  89 }
  90
  91 /* Called only as a tasklet (software IRQ) */
  92 static struct sk_buff *
  93 rtllib_frag_cache_get(struct rtllib_device *ieee,
  94                          struct rtllib_hdr_4addr *hdr)
  95 {
  96         struct sk_buff *skb = NULL;
  97         u16 fc = le16_to_cpu(hdr->frame_ctl);
  98         u16 sc = le16_to_cpu(hdr->seq_ctl);
  99         unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
 100         unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
 101         struct rtllib_frag_entry *entry;
 102         struct rtllib_hdr_3addrqos *hdr_3addrqos;
 103         struct rtllib_hdr_4addrqos *hdr_4addrqos;
 104         u8 tid;
 105
 106         if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS)&&RTLLIB_QOS_HAS_SEQ(fc)) {
 107           hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
 108           tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 109           tid = UP2AC(tid);
 110           tid ++;
 111         } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
 112           hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
 113           tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 114           tid = UP2AC(tid);
 115           tid ++;
 116         } else {
 117           tid = 0;
 118         }
 119
 120         if (frag == 0) {
 121                 /* Reserve enough space to fit maximum frame length */
 122                 skb = dev_alloc_skb(ieee->dev->mtu +
 123                                     sizeof(struct rtllib_hdr_4addr) +
 124                                     8 /* LLC */ +
 125                                     2 /* alignment */ +
 126                                     8 /* WEP */ +
 127                                     ETH_ALEN /* WDS */ +
 128                                     (RTLLIB_QOS_HAS_SEQ(fc)?2:0) /* QOS Control */);
 129                 if (skb == NULL)
 130                         return NULL;
 131
 132                 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
 133                 ieee->frag_next_idx[tid]++;
 134                 if (ieee->frag_next_idx[tid] >= RTLLIB_FRAG_CACHE_LEN)
 135                         ieee->frag_next_idx[tid] = 0;
 136
 137                 if (entry->skb != NULL)
 138                         dev_kfree_skb_any(entry->skb);
 139
 140                 entry->first_frag_time = jiffies;
 141                 entry->seq = seq;
 142                 entry->last_frag = frag;
 143                 entry->skb = skb;
 144                 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
 145                 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
 146         } else {
 147                 /* received a fragment of a frame for which the head fragment
 148                  * should have already been received */
 149                 entry = rtllib_frag_cache_find(ieee, seq, frag, tid,hdr->addr2,
 150                                                   hdr->addr1);
 151                 if (entry != NULL) {
 152                         entry->last_frag = frag;
 153                         skb = entry->skb;
 154                 }
 155         }
 156
 157         return skb;
 158 }
 159
 160
 161 /* Called only as a tasklet (software IRQ) */
 162 static int rtllib_frag_cache_invalidate(struct rtllib_device *ieee,
 163                                            struct rtllib_hdr_4addr *hdr)
 164 {
 165         u16 fc = le16_to_cpu(hdr->frame_ctl);
 166         u16 sc = le16_to_cpu(hdr->seq_ctl);
 167         unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
 168         struct rtllib_frag_entry *entry;
 169         struct rtllib_hdr_3addrqos *hdr_3addrqos;
 170         struct rtllib_hdr_4addrqos *hdr_4addrqos;
 171         u8 tid;
 172
 173         if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS)&&RTLLIB_QOS_HAS_SEQ(fc)) {
 174           hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
 175           tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 176           tid = UP2AC(tid);
 177           tid ++;
 178         } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
 179           hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
 180           tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 181           tid = UP2AC(tid);
 182           tid ++;
 183         } else {
 184           tid = 0;
 185         }
 186
 187         entry = rtllib_frag_cache_find(ieee, seq, -1, tid,hdr->addr2,
 188                                           hdr->addr1);
 189
 190         if (entry == NULL) {
 191                 RTLLIB_DEBUG_FRAG(
 192                         "could not invalidate fragment cache "
 193                         "entry (seq=%u)\n", seq);
 194                 return -1;
 195         }
 196
 197         entry->skb = NULL;
 198         return 0;
 199 }
 200
 201
 202
 203 /* rtllib_rx_frame_mgtmt
 204  *
 205  * Responsible for handling management control frames
 206  *
 207  * Called by rtllib_rx */
 208 static inline int
 209 rtllib_rx_frame_mgmt(struct rtllib_device *ieee, struct sk_buff *skb,
 210                         struct rtllib_rx_stats *rx_stats, u16 type,
 211                         u16 stype)
 212 {
 213         /* On the struct stats definition there is written that
 214          * this is not mandatory.... but seems that the probe
 215          * response parser uses it
 216          */
 217         struct rtllib_hdr_3addr * hdr = (struct rtllib_hdr_3addr *)skb->data;
 218
 219         rx_stats->len = skb->len;
 220         rtllib_rx_mgt(ieee,skb,rx_stats);
 221         if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN))) {
 222                 dev_kfree_skb_any(skb);
 223                 return 0;
 224         }
 225         rtllib_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
 226
 227         dev_kfree_skb_any(skb);
 228
 229         return 0;
 230 }
 231
 232 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
 233 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
 234 static unsigned char rfc1042_header[] =
 235 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
 236 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
 237 static unsigned char bridge_tunnel_header[] =
 238 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
 239 /* No encapsulation header if EtherType < 0x600 (=length) */
 240
 241 /* Called by rtllib_rx_frame_decrypt */
 242 static int rtllib_is_eapol_frame(struct rtllib_device *ieee,
 243                                     struct sk_buff *skb, size_t hdrlen)
 244 {
 245         struct net_device *dev = ieee->dev;
 246         u16 fc, ethertype;
 247         struct rtllib_hdr_4addr *hdr;
 248         u8 *pos;
 249
 250         if (skb->len < 24)
 251                 return 0;
 252
 253         hdr = (struct rtllib_hdr_4addr *) skb->data;
 254         fc = le16_to_cpu(hdr->frame_ctl);
 255
 256         /* check that the frame is unicast frame to us */
 257         if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
 258             RTLLIB_FCTL_TODS &&
 259             memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
 260             memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
 261                 /* ToDS frame with own addr BSSID and DA */
 262         } else if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
 263                    RTLLIB_FCTL_FROMDS &&
 264                    memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
 265                 /* FromDS frame with own addr as DA */
 266         } else
 267                 return 0;
 268
 269         if (skb->len < 24 + 8)
 270                 return 0;
 271
 272         /* check for port access entity Ethernet type */
 273         pos = skb->data + hdrlen;
 274         ethertype = (pos[6] << 8) | pos[7];
 275         if (ethertype == ETH_P_PAE)
 276                 return 1;
 277
 278         return 0;
 279 }
 280
 281 /* Called only as a tasklet (software IRQ), by rtllib_rx */
 282 static inline int
 283 rtllib_rx_frame_decrypt(struct rtllib_device* ieee, struct sk_buff *skb,
 284                            struct rtllib_crypt_data *crypt)
 285 {
 286         struct rtllib_hdr_4addr *hdr;
 287         int res, hdrlen;
 288
 289         if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
 290                 return 0;
 291
 292         if (ieee->hwsec_active)
 293         {
 294                 struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb+ MAX_DEV_ADDR_SIZE);
 295                 tcb_desc->bHwSec = 1;
 296
 297                 if (ieee->need_sw_enc)
 298                         tcb_desc->bHwSec = 0;
 299         }
 300
 301         hdr = (struct rtllib_hdr_4addr *) skb->data;
 302         hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 303
 304         atomic_inc(&crypt->refcnt);
 305         res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
 306         atomic_dec(&crypt->refcnt);
 307         if (res < 0) {
 308                 RTLLIB_DEBUG_DROP(
 309                         "decryption failed (SA=" MAC_FMT
 310                         ") res=%d\n", MAC_ARG(hdr->addr2), res);
 311                 if (res == -2)
 312                         RTLLIB_DEBUG_DROP("Decryption failed ICV "
 313                                              "mismatch (key %d)\n",
 314                                              skb->data[hdrlen + 3] >> 6);
 315                 ieee->ieee_stats.rx_discards_undecryptable++;
 316                 return -1;
 317         }
 318
 319         return res;
 320 }
 321
 322
 323 /* Called only as a tasklet (software IRQ), by rtllib_rx */
 324 static inline int
 325 rtllib_rx_frame_decrypt_msdu(struct rtllib_device* ieee, struct sk_buff *skb,
 326                              int keyidx, struct rtllib_crypt_data *crypt)
 327 {
 328         struct rtllib_hdr_4addr *hdr;
 329         int res, hdrlen;
 330
 331         if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
 332                 return 0;
 333         if (ieee->hwsec_active)
 334         {
 335                 struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb+ MAX_DEV_ADDR_SIZE);
 336                 tcb_desc->bHwSec = 1;
 337
 338                 if (ieee->need_sw_enc)
 339                         tcb_desc->bHwSec = 0;
 340         }
 341
 342         hdr = (struct rtllib_hdr_4addr *) skb->data;
 343         hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 344
 345         atomic_inc(&crypt->refcnt);
 346         res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv,ieee);
 347         atomic_dec(&crypt->refcnt);
 348         if (res < 0) {
 349                 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
 350                        " (SA=" MAC_FMT " keyidx=%d)\n",
 351                        ieee->dev->name, MAC_ARG(hdr->addr2), keyidx);
 352                 return -1;
 353         }
 354
 355         return 0;
 356 }
 357
 358
 359 /* this function is stolen from ipw2200 driver*/
 360 #define IEEE_PACKET_RETRY_TIME (5*HZ)
 361 static int is_duplicate_packet(struct rtllib_device *ieee,
 362                                       struct rtllib_hdr_4addr *header)
 363 {
 364         u16 fc = le16_to_cpu(header->frame_ctl);
 365         u16 sc = le16_to_cpu(header->seq_ctl);
 366         u16 seq = WLAN_GET_SEQ_SEQ(sc);
 367         u16 frag = WLAN_GET_SEQ_FRAG(sc);
 368         u16 *last_seq, *last_frag;
 369         unsigned long *last_time;
 370         struct rtllib_hdr_3addrqos *hdr_3addrqos;
 371         struct rtllib_hdr_4addrqos *hdr_4addrqos;
 372         u8 tid;
 373
 374         if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS)&&RTLLIB_QOS_HAS_SEQ(fc)) {
 375           hdr_4addrqos = (struct rtllib_hdr_4addrqos *)header;
 376           tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 377           tid = UP2AC(tid);
 378           tid ++;
 379         } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
 380           hdr_3addrqos = (struct rtllib_hdr_3addrqos*)header;
 381           tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 382           tid = UP2AC(tid);
 383           tid ++;
 384         } else {
 385           tid = 0;
 386         }
 387
 388         switch (ieee->iw_mode) {
 389         case IW_MODE_ADHOC:
 390         {
 391                 struct list_head *p;
 392                 struct ieee_ibss_seq *entry = NULL;
 393                 u8 *mac = header->addr2;
 394                 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
 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
 433                 }
 434                 if (*last_frag + 1 != frag)
 435                         /* out-of-order fragment */
 436                         goto drop;
 437         } else
 438                 *last_seq = seq;
 439
 440         *last_frag = frag;
 441         *last_time = jiffies;
 442         return 0;
 443
 444 drop:
 445
 446         return 1;
 447 }
 448 bool
 449 AddReorderEntry(
 450         struct rx_ts_record *pTS,
 451         struct rx_reorder_entry *pReorderEntry
 452         )
 453 {
 454         struct list_head *pList = &pTS->RxPendingPktList;
 455
 456         while(pList->next != &pTS->RxPendingPktList)
 457         {
 458                 if ( SN_LESS(pReorderEntry->SeqNum, ((struct rx_reorder_entry *)list_entry(pList->next,struct rx_reorder_entry,List))->SeqNum) )
 459                 {
 460                         pList = pList->next;
 461                 }
 462                 else if ( SN_EQUAL(pReorderEntry->SeqNum, ((struct rx_reorder_entry *)list_entry(pList->next,struct rx_reorder_entry,List))->SeqNum) )
 463                 {
 464                         return false;
 465                 }
 466                 else
 467                 {
 468                         break;
 469                 }
 470         }
 471         pReorderEntry->List.next = pList->next;
 472         pReorderEntry->List.next->prev = &pReorderEntry->List;
 473         pReorderEntry->List.prev = pList;
 474         pList->next = &pReorderEntry->List;
 475
 476         return true;
 477 }
 478
 479 void rtllib_indicate_packets(struct rtllib_device *ieee, struct rtllib_rxb** prxbIndicateArray,u8  index)
 480 {
 481         struct net_device_stats *stats = &ieee->stats;
 482         u8 i = 0 , j=0;
 483         u16 ethertype;
 484         for (j = 0; j < index; j++) {
 485                 struct rtllib_rxb* prxb = prxbIndicateArray[j];
 486                 for (i = 0; i<prxb->nr_subframes; i++) {
 487                         struct sk_buff *sub_skb = prxb->subframes[i];
 488
 489                 /* convert hdr + possible LLC headers into Ethernet header */
 490                         ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
 491                         if (sub_skb->len >= 8 &&
 492                                 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
 493                                   ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
 494                                  memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
 495                         /* remove RFC1042 or Bridge-Tunnel encapsulation and
 496                          * replace EtherType */
 497                                 skb_pull(sub_skb, SNAP_SIZE);
 498                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
 499                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
 500                         } else {
 501                                 u16 len;
 502                         /* Leave Ethernet header part of hdr and full payload */
 503                                 len = htons(sub_skb->len);
 504                                 memcpy(skb_push(sub_skb, 2), &len, 2);
 505                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
 506                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
 507                         }
 508
 509                 /* Indicat the packets to upper layer */
 510                         if (sub_skb) {
 511                                 stats->rx_packets++;
 512                                 stats->rx_bytes += sub_skb->len;
 513
 514                                 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
 515                                 sub_skb->protocol = eth_type_trans(sub_skb, ieee->dev);
 516                                 sub_skb->dev = ieee->dev;
 517                                 sub_skb->dev->stats.rx_packets++;
 518                                 sub_skb->dev->stats.rx_bytes += sub_skb->len;
 519                                 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
 520                                 ieee->last_rx_ps_time = jiffies;
 521                                 netif_rx(sub_skb);
 522                         }
 523                 }
 524                 kfree(prxb);
 525                 prxb = NULL;
 526         }
 527 }
 528
 529 void
 530 rtllib_FlushRxTsPendingPkts(struct rtllib_device *ieee, struct rx_ts_record *pTS)
 531 {
 532         struct rx_reorder_entry *pRxReorderEntry;
 533         struct rtllib_rxb*              RfdArray[REORDER_WIN_SIZE];
 534         u8                                      RfdCnt = 0;
 535
 536
 537         del_timer_sync(&pTS->RxPktPendingTimer);
 538         while(!list_empty(&pTS->RxPendingPktList))
 539         {
 540                 if (RfdCnt >= REORDER_WIN_SIZE){
 541                         printk("-------------->%s() error! RfdCnt >= REORDER_WIN_SIZE\n", __func__);
 542                         break;
 543                 }
 544
 545                 pRxReorderEntry = (struct rx_reorder_entry *)list_entry(pTS->RxPendingPktList.prev,struct rx_reorder_entry,List);
 546                 RTLLIB_DEBUG(RTLLIB_DL_REORDER,"%s(): Indicate SeqNum %d!\n",__func__, pRxReorderEntry->SeqNum);
 547                 list_del_init(&pRxReorderEntry->List);
 548
 549                 RfdArray[RfdCnt] = pRxReorderEntry->prxb;
 550
 551                 RfdCnt = RfdCnt + 1;
 552                 list_add_tail(&pRxReorderEntry->List, &ieee->RxReorder_Unused_List);
 553         }
 554         rtllib_indicate_packets(ieee, RfdArray, RfdCnt);
 555
 556         pTS->RxIndicateSeq = 0xffff;
 557 }
 558
 559
 560 void RxReorderIndicatePacket( struct rtllib_device *ieee,
 561                 struct rtllib_rxb* prxb,
 562                 struct rx_ts_record *pTS,
 563                 u16                     SeqNum)
 564 {
 565         struct rt_hi_throughput *pHTInfo = ieee->pHTInfo;
 566         struct rx_reorder_entry *pReorderEntry = NULL;
 567         struct rtllib_rxb* prxbIndicateArray[REORDER_WIN_SIZE];
 568         u8                      WinSize = pHTInfo->RxReorderWinSize;
 569         u16                     WinEnd = 0;
 570         u8                      index = 0;
 571         bool                    bMatchWinStart = false, bPktInBuf = false;
 572         unsigned long flags;
 573
 574         RTLLIB_DEBUG(RTLLIB_DL_REORDER,"%s(): Seq is %d,pTS->RxIndicateSeq is %d, WinSize is %d\n",__func__,SeqNum,pTS->RxIndicateSeq,WinSize);
 575
 576         spin_lock_irqsave(&(ieee->reorder_spinlock), flags);
 577
 578         WinEnd = (pTS->RxIndicateSeq + WinSize -1)%4096;
 579         /* Rx Reorder initialize condition.*/
 580         if (pTS->RxIndicateSeq == 0xffff) {
 581                 pTS->RxIndicateSeq = SeqNum;
 582         }
 583
 584         /* Drop out the packet which SeqNum is smaller than WinStart */
 585         if (SN_LESS(SeqNum, pTS->RxIndicateSeq)) {
 586                 RTLLIB_DEBUG(RTLLIB_DL_REORDER,"Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
 587                                  pTS->RxIndicateSeq, SeqNum);
 588                 pHTInfo->RxReorderDropCounter++;
 589                 {
 590                         int i;
 591                         for (i =0; i < prxb->nr_subframes; i++) {
 592                                 dev_kfree_skb(prxb->subframes[i]);
 593                         }
 594                         kfree(prxb);
 595                         prxb = NULL;
 596                 }
 597                 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
 598                 return;
 599         }
 600
 601         /*
 602          * Sliding window manipulation. Conditions includes:
 603          * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
 604          * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
 605          */
 606         if (SN_EQUAL(SeqNum, pTS->RxIndicateSeq)) {
 607                 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
 608                 bMatchWinStart = true;
 609         } else if (SN_LESS(WinEnd, SeqNum)) {
 610                 if (SeqNum >= (WinSize - 1)) {
 611                         pTS->RxIndicateSeq = SeqNum + 1 -WinSize;
 612                 } else {
 613                         pTS->RxIndicateSeq = 4095 - (WinSize - (SeqNum +1)) + 1;
 614                 }
 615                 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Window Shift! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum);
 616         }
 617
 618         /*
 619          * Indication process.
 620          * After Packet dropping and Sliding Window shifting as above, we can now just indicate the packets
 621          * with the SeqNum smaller than latest WinStart and struct buffer other packets.
 622          */
 623         /* For Rx Reorder condition:
 624          * 1. All packets with SeqNum smaller than WinStart => Indicate
 625          * 2. All packets with SeqNum larger than or equal to WinStart => Buffer it.
 626          */
 627         if (bMatchWinStart) {
 628                 /* Current packet is going to be indicated.*/
 629                 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Packets indication!! IndicateSeq: %d, NewSeq: %d\n",\
 630                                 pTS->RxIndicateSeq, SeqNum);
 631                 prxbIndicateArray[0] = prxb;
 632                 index = 1;
 633         } else {
 634                 /* Current packet is going to be inserted into pending list.*/
 635                 if (!list_empty(&ieee->RxReorder_Unused_List)) {
 636                         pReorderEntry = (struct rx_reorder_entry *)list_entry(ieee->RxReorder_Unused_List.next,struct rx_reorder_entry,List);
 637                         list_del_init(&pReorderEntry->List);
 638
 639                         /* Make a reorder entry and insert into a the packet list.*/
 640                         pReorderEntry->SeqNum = SeqNum;
 641                         pReorderEntry->prxb = prxb;
 642
 643                         if (!AddReorderEntry(pTS, pReorderEntry)) {
 644                                 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): Duplicate packet is dropped!! IndicateSeq: %d, NewSeq: %d\n",
 645                                         __func__, pTS->RxIndicateSeq, SeqNum);
 646                                 list_add_tail(&pReorderEntry->List,&ieee->RxReorder_Unused_List);
 647                                 {
 648                                         int i;
 649                                         for (i =0; i < prxb->nr_subframes; i++) {
 650                                                 dev_kfree_skb(prxb->subframes[i]);
 651                                         }
 652                                         kfree(prxb);
 653                                         prxb = NULL;
 654                                 }
 655                         } else {
 656                                 RTLLIB_DEBUG(RTLLIB_DL_REORDER,
 657                                          "Pkt insert into struct buffer!! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum);
 658                         }
 659                 }
 660                 else {
 661                         /*
 662                          * Packets are dropped if there is not enough reorder entries.
 663                          * This part shall be modified!! We can just indicate all the
 664                          * packets in struct buffer and get reorder entries.
 665                          */
 666                         RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket(): There is no reorder entry!! Packet is dropped!!\n");
 667                         {
 668                                 int i;
 669                                 for (i =0; i < prxb->nr_subframes; i++) {
 670                                         dev_kfree_skb(prxb->subframes[i]);
 671                                 }
 672                                 kfree(prxb);
 673                                 prxb = NULL;
 674                         }
 675                 }
 676         }
 677
 678         /* Check if there is any packet need indicate.*/
 679         while(!list_empty(&pTS->RxPendingPktList)) {
 680                 RTLLIB_DEBUG(RTLLIB_DL_REORDER,"%s(): start RREORDER indicate\n",__func__);
 681
 682                 pReorderEntry = (struct rx_reorder_entry *)list_entry(pTS->RxPendingPktList.prev,struct rx_reorder_entry,List);
 683                 if ( SN_LESS(pReorderEntry->SeqNum, pTS->RxIndicateSeq) ||
 684                                 SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
 685                 {
 686                         /* This protect struct buffer from overflow. */
 687                         if (index >= REORDER_WIN_SIZE) {
 688                                 RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket(): Buffer overflow!! \n");
 689                                 bPktInBuf = true;
 690                                 break;
 691                         }
 692
 693                         list_del_init(&pReorderEntry->List);
 694
 695                         if (SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
 696                                 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
 697
 698                         prxbIndicateArray[index] = pReorderEntry->prxb;
 699                         RTLLIB_DEBUG(RTLLIB_DL_REORDER,"%s(): Indicate SeqNum %d!\n",__func__, pReorderEntry->SeqNum);
 700                         index++;
 701
 702                         list_add_tail(&pReorderEntry->List,&ieee->RxReorder_Unused_List);
 703                 } else {
 704                         bPktInBuf = true;
 705                         break;
 706                 }
 707         }
 708
 709         /* Handling pending timer. Set this timer to prevent from long time Rx buffering.*/
 710         if (index>0) {
 711                 if (timer_pending(&pTS->RxPktPendingTimer)){
 712                         del_timer_sync(&pTS->RxPktPendingTimer);
 713                 }
 714                 pTS->RxTimeoutIndicateSeq = 0xffff;
 715
 716                 if (index>REORDER_WIN_SIZE){
 717                         RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket(): Rx Reorer struct buffer full!! \n");
 718                         spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
 719                         return;
 720                 }
 721                 rtllib_indicate_packets(ieee, prxbIndicateArray, index);
 722                 bPktInBuf = false;
 723         }
 724
 725         if (bPktInBuf && pTS->RxTimeoutIndicateSeq==0xffff) {
 726                 RTLLIB_DEBUG(RTLLIB_DL_REORDER,"%s(): SET rx timeout timer\n", __func__);
 727                 pTS->RxTimeoutIndicateSeq = pTS->RxIndicateSeq;
 728                 mod_timer(&pTS->RxPktPendingTimer,  jiffies + MSECS(pHTInfo->RxReorderPendingTime));
 729         }
 730         spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
 731 }
 732
 733 u8 parse_subframe(struct rtllib_device* ieee,struct sk_buff *skb,
 734                   struct rtllib_rx_stats *rx_stats,
 735                   struct rtllib_rxb *rxb,u8* src,u8* dst)
 736 {
 737         struct rtllib_hdr_3addr  *hdr = (struct rtllib_hdr_3addr* )skb->data;
 738         u16             fc = le16_to_cpu(hdr->frame_ctl);
 739
 740         u16             LLCOffset= sizeof(struct rtllib_hdr_3addr);
 741         u16             ChkLength;
 742         bool            bIsAggregateFrame = false;
 743         u16             nSubframe_Length;
 744         u8              nPadding_Length = 0;
 745         u16             SeqNum=0;
 746         struct sk_buff *sub_skb;
 747         u8             *data_ptr;
 748         /* just for debug purpose */
 749         SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl));
 750         if ((RTLLIB_QOS_HAS_SEQ(fc))&&\
 751                         (((union frameqos *)(skb->data + RTLLIB_3ADDR_LEN))->field.reserved)) {
 752                 bIsAggregateFrame = true;
 753         }
 754
 755         if (RTLLIB_QOS_HAS_SEQ(fc)) {
 756                 LLCOffset += 2;
 757         }
 758         if (rx_stats->bContainHTC) {
 759                 LLCOffset += sHTCLng;
 760         }
 761
 762         ChkLength = LLCOffset;/* + (Frame_WEP(frame)!=0 ?Adapter->MgntInfo.SecurityInfo.EncryptionHeadOverhead:0);*/
 763
 764         if ( skb->len <= ChkLength ) {
 765                 return 0;
 766         }
 767
 768         skb_pull(skb, LLCOffset);
 769         ieee->bIsAggregateFrame = bIsAggregateFrame;
 770         if (!bIsAggregateFrame) {
 771                 rxb->nr_subframes = 1;
 772
 773                 /* altered by clark 3/30/2010
 774                  * The struct buffer size of the skb indicated to upper layer
 775                  * must be less than 5000, or the defraged IP datagram
 776                  * in the IP layer will exceed "ipfrag_high_tresh" and be
 777                  * discarded. so there must not use the function
 778                  * "skb_copy" and "skb_clone" for "skb".
 779                  */
 780
 781                 /* Allocate new skb for releasing to upper layer */
 782                 sub_skb = dev_alloc_skb(RTLLIB_SKBBUFFER_SIZE);
 783                 skb_reserve(sub_skb, 12);
 784                 data_ptr = (u8 *)skb_put(sub_skb, skb->len);
 785                 memcpy(data_ptr, skb->data, skb->len);
 786                 sub_skb->dev = ieee->dev;
 787
 788                 rxb->subframes[0] = sub_skb;
 789
 790                 memcpy(rxb->src,src,ETH_ALEN);
 791                 memcpy(rxb->dst,dst,ETH_ALEN);
 792                 rxb->subframes[0]->dev = ieee->dev;
 793                 return 1;
 794         } else {
 795                 rxb->nr_subframes = 0;
 796                 memcpy(rxb->src,src,ETH_ALEN);
 797                 memcpy(rxb->dst,dst,ETH_ALEN);
 798                 while(skb->len > ETHERNET_HEADER_SIZE) {
 799                         /* Offset 12 denote 2 mac address */
 800                         nSubframe_Length = *((u16*)(skb->data + 12));
 801                         nSubframe_Length = (nSubframe_Length>>8) + (nSubframe_Length<<8);
 802
 803                         if (skb->len<(ETHERNET_HEADER_SIZE + nSubframe_Length)) {
 804                                 printk("%s: A-MSDU parse error!! pRfd->nTotalSubframe : %d\n",\
 805                                                 __func__,rxb->nr_subframes);
 806                                 printk("%s: A-MSDU parse error!! Subframe Length: %d\n",__func__, nSubframe_Length);
 807                                 printk("nRemain_Length is %d and nSubframe_Length is : %d\n",skb->len,nSubframe_Length);
 808                                 printk("The Packet SeqNum is %d\n",SeqNum);
 809                                 return 0;
 810                         }
 811
 812                         /* move the data point to data content */
 813                         skb_pull(skb, ETHERNET_HEADER_SIZE);
 814
 815                         /* altered by clark 3/30/2010
 816                          * The struct buffer size of the skb indicated to upper layer
 817                          * must be less than 5000, or the defraged IP datagram
 818                          * in the IP layer will exceed "ipfrag_high_tresh" and be
 819                          * discarded. so there must not use the function
 820                          * "skb_copy" and "skb_clone" for "skb".
 821                          */
 822
 823                         /* Allocate new skb for releasing to upper layer */
 824                         sub_skb = dev_alloc_skb(nSubframe_Length + 12);
 825                         skb_reserve(sub_skb, 12);
 826                         data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
 827                         memcpy(data_ptr,skb->data,nSubframe_Length);
 828
 829                         sub_skb->dev = ieee->dev;
 830                         rxb->subframes[rxb->nr_subframes++] = sub_skb;
 831                         if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
 832                                 RTLLIB_DEBUG_RX("ParseSubframe(): Too many Subframes! Packets dropped!\n");
 833                                 break;
 834                         }
 835                         skb_pull(skb,nSubframe_Length);
 836
 837                         if (skb->len != 0) {
 838                                 nPadding_Length = 4 - ((nSubframe_Length + ETHERNET_HEADER_SIZE) % 4);
 839                                 if (nPadding_Length == 4) {
 840                                         nPadding_Length = 0;
 841                                 }
 842
 843                                 if (skb->len < nPadding_Length) {
 844                                         return 0;
 845                                 }
 846
 847                                 skb_pull(skb,nPadding_Length);
 848                         }
 849                 }
 850
 851                 return rxb->nr_subframes;
 852         }
 853 }
 854
 855
 856 size_t rtllib_rx_get_hdrlen(struct rtllib_device *ieee, struct sk_buff *skb,
 857                  struct rtllib_rx_stats *rx_stats)
 858 {
 859         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
 860         u16 fc = le16_to_cpu(hdr->frame_ctl);
 861         size_t hdrlen = 0;
 862
 863         hdrlen = rtllib_get_hdrlen(fc);
 864         if (HTCCheck(ieee, skb->data)) {
 865                 if (net_ratelimit())
 866                         printk("%s: find HTCControl!\n", __func__);
 867                 hdrlen += 4;
 868                 rx_stats->bContainHTC = 1;
 869         }
 870
 871          if (RTLLIB_QOS_HAS_SEQ(fc))
 872                 rx_stats->bIsQosData = 1;
 873
 874         return hdrlen;
 875 }
 876
 877 int rtllib_rx_check_duplicate(struct rtllib_device *ieee, struct sk_buff *skb, u8 multicast)
 878 {
 879         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
 880         u16 fc, sc;
 881         u8 frag, type, stype;
 882
 883         fc = le16_to_cpu(hdr->frame_ctl);
 884         type = WLAN_FC_GET_TYPE(fc);
 885         stype = WLAN_FC_GET_STYPE(fc);
 886         sc = le16_to_cpu(hdr->seq_ctl);
 887         frag = WLAN_GET_SEQ_FRAG(sc);
 888
 889         if ( (ieee->pHTInfo->bCurRxReorderEnable == false) ||
 890                 !ieee->current_network.qos_data.active ||
 891                 !IsDataFrame(skb->data) ||
 892                 IsLegacyDataFrame(skb->data)) {
 893                 if (!((type == RTLLIB_FTYPE_MGMT) && (stype == RTLLIB_STYPE_BEACON))){
 894                         if (is_duplicate_packet(ieee, hdr)){
 895                                 return -1;
 896                         }
 897                 }
 898         } else {
 899                 struct rx_ts_record *pRxTS = NULL;
 900                 if (GetTs(ieee, (struct ts_common_info **) &pRxTS, hdr->addr2,
 901                         (u8)Frame_QoSTID((u8*)(skb->data)), RX_DIR, true)) {
 902                         if ((fc & (1<<11)) && (frag == pRxTS->RxLastFragNum) &&
 903                             (WLAN_GET_SEQ_SEQ(sc) == pRxTS->RxLastSeqNum)) {
 904                                 return -1;
 905                         } else {
 906                                 pRxTS->RxLastFragNum = frag;
 907                                 pRxTS->RxLastSeqNum = WLAN_GET_SEQ_SEQ(sc);
 908                         }
 909                 } else {
 910                         RTLLIB_DEBUG(RTLLIB_DL_ERR, "ERR!!%s(): No TS!! Skip the check!!\n",__func__);
 911                         return -1;
 912                 }
 913         }
 914
 915         return 0;
 916 }
 917 void rtllib_rx_extract_addr(struct rtllib_device *ieee, struct rtllib_hdr_4addr *hdr, u8 *dst, u8 *src, u8 *bssid)
 918 {
 919         u16 fc = le16_to_cpu(hdr->frame_ctl);
 920
 921         switch (fc & (RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS)) {
 922                 case RTLLIB_FCTL_FROMDS:
 923                         memcpy(dst, hdr->addr1, ETH_ALEN);
 924                         memcpy(src, hdr->addr3, ETH_ALEN);
 925                         memcpy(bssid, hdr->addr2, ETH_ALEN);
 926                         break;
 927                 case RTLLIB_FCTL_TODS:
 928                         memcpy(dst, hdr->addr3, ETH_ALEN);
 929                         memcpy(src, hdr->addr2, ETH_ALEN);
 930                         memcpy(bssid, hdr->addr1, ETH_ALEN);
 931                         break;
 932                 case RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS:
 933                         memcpy(dst, hdr->addr3, ETH_ALEN);
 934                         memcpy(src, hdr->addr4, ETH_ALEN);
 935                         memcpy(bssid, ieee->current_network.bssid, ETH_ALEN);
 936                         break;
 937                 case 0:
 938                         memcpy(dst, hdr->addr1, ETH_ALEN);
 939                         memcpy(src, hdr->addr2, ETH_ALEN);
 940                         memcpy(bssid, hdr->addr3, ETH_ALEN);
 941                         break;
 942         }
 943 }
 944 int rtllib_rx_data_filter(struct rtllib_device *ieee, u16 fc, u8 *dst, u8 *src, u8 *bssid, u8 *addr2)
 945 {
 946         u8 zero_addr[ETH_ALEN] = {0};
 947         u8 type, stype;
 948
 949         type = WLAN_FC_GET_TYPE(fc);
 950         stype = WLAN_FC_GET_STYPE(fc);
 951
 952         /* Filter frames from different BSS */
 953         if (((fc & RTLLIB_FCTL_DSTODS) != RTLLIB_FCTL_DSTODS)
 954                 && (compare_ether_addr(ieee->current_network.bssid, bssid) != 0)
 955                 && memcmp(ieee->current_network.bssid, zero_addr, ETH_ALEN)) {
 956                 return -1;
 957         }
 958
 959         /* Filter packets sent by an STA that will be forwarded by AP */
 960         if ( ieee->IntelPromiscuousModeInfo.bPromiscuousOn  &&
 961                 ieee->IntelPromiscuousModeInfo.bFilterSourceStationFrame ) {
 962                 if ((fc & RTLLIB_FCTL_TODS) && !(fc & RTLLIB_FCTL_FROMDS) &&
 963                         (compare_ether_addr(dst, ieee->current_network.bssid) != 0) &&
 964                         (compare_ether_addr(bssid, ieee->current_network.bssid) == 0)) {
 965                         return -1;
 966                 }
 967         }
 968
 969         /* Nullfunc frames may have PS-bit set, so they must be passed to
 970          * hostap_handle_sta_rx() before being dropped here. */
 971         if (!ieee->IntelPromiscuousModeInfo.bPromiscuousOn){
 972                 if (stype != RTLLIB_STYPE_DATA &&
 973                     stype != RTLLIB_STYPE_DATA_CFACK &&
 974                     stype != RTLLIB_STYPE_DATA_CFPOLL &&
 975                     stype != RTLLIB_STYPE_DATA_CFACKPOLL&&
 976                     stype != RTLLIB_STYPE_QOS_DATA
 977                     ) {
 978                         if (stype != RTLLIB_STYPE_NULLFUNC)
 979                                 RTLLIB_DEBUG_DROP(
 980                                         "RX: dropped data frame "
 981                                         "with no data (type=0x%02x, "
 982                                         "subtype=0x%02x)\n",
 983                                         type, stype);
 984                         return -1;
 985                 }
 986         }
 987
 988         if (ieee->iw_mode != IW_MODE_MESH) {
 989                 /* packets from our adapter are dropped (echo) */
 990                 if (!memcmp(src, ieee->dev->dev_addr, ETH_ALEN))
 991                         return -1;
 992
 993                 /* {broad,multi}cast packets to our BSS go through */
 994                 if (is_multicast_ether_addr(dst) || is_broadcast_ether_addr(dst)) {
 995                         if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN)) {
 996                                 return -1;
 997                         }
 998                 }
 999         }
1000         return 0;
1001 }
1002 int rtllib_rx_get_crypt(
1003                 struct rtllib_device *ieee,
1004                 struct sk_buff *skb,
1005                 struct rtllib_crypt_data **crypt,
1006                 size_t hdrlen)
1007 {
1008         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1009         u16 fc = le16_to_cpu(hdr->frame_ctl);
1010         int idx = 0;
1011
1012         if (ieee->host_decrypt) {
1013                 if (skb->len >= hdrlen + 3)
1014                         idx = skb->data[hdrlen + 3] >> 6;
1015
1016                 *crypt = ieee->crypt[idx];
1017                 /* allow NULL decrypt to indicate an station specific override
1018                  * for default encryption */
1019                 if (*crypt && ((*crypt)->ops == NULL ||
1020                               (*crypt)->ops->decrypt_mpdu == NULL))
1021                         *crypt = NULL;
1022
1023                 if (!*crypt && (fc & RTLLIB_FCTL_WEP)) {
1024                         /* This seems to be triggered by some (multicast?)
1025                          * frames from other than current BSS, so just drop the
1026                          * frames silently instead of filling system log with
1027                          * these reports. */
1028                         RTLLIB_DEBUG_DROP("Decryption failed (not set)"
1029                                              " (SA=" MAC_FMT ")\n",
1030                                              MAC_ARG(hdr->addr2));
1031                         ieee->ieee_stats.rx_discards_undecryptable++;
1032                         return -1;
1033                 }
1034         }
1035
1036         return 0;
1037 }
1038 int rtllib_rx_decrypt(
1039                 struct rtllib_device *ieee,
1040                 struct sk_buff *skb,
1041                 struct rtllib_rx_stats *rx_stats,
1042                 struct rtllib_crypt_data *crypt,
1043                 size_t hdrlen)
1044 {
1045         struct rtllib_hdr_4addr *hdr;
1046         int keyidx = 0;
1047         u16 fc, sc;
1048         u8 frag;
1049
1050         hdr = (struct rtllib_hdr_4addr *)skb->data;
1051         fc = le16_to_cpu(hdr->frame_ctl);
1052         sc = le16_to_cpu(hdr->seq_ctl);
1053         frag = WLAN_GET_SEQ_FRAG(sc);
1054
1055         if ((!rx_stats->Decrypted)){
1056                 ieee->need_sw_enc = 1;
1057         }else{
1058                 ieee->need_sw_enc = 0;
1059         }
1060
1061         if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) &&
1062             ((keyidx = rtllib_rx_frame_decrypt(ieee, skb, crypt)) < 0)) {
1063                 printk("%s: decrypt frame error\n", __func__);
1064                 return -1;
1065         }
1066
1067         hdr = (struct rtllib_hdr_4addr *) skb->data;
1068         if ((frag != 0 || (fc & RTLLIB_FCTL_MOREFRAGS))) {
1069                 int flen;
1070                 struct sk_buff *frag_skb = rtllib_frag_cache_get(ieee, hdr);
1071                 RTLLIB_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
1072
1073                 if (!frag_skb) {
1074                         RTLLIB_DEBUG(RTLLIB_DL_RX | RTLLIB_DL_FRAG,
1075                                         "Rx cannot get skb from fragment "
1076                                         "cache (morefrag=%d seq=%u frag=%u)\n",
1077                                         (fc & RTLLIB_FCTL_MOREFRAGS) != 0,
1078                                         WLAN_GET_SEQ_SEQ(sc), frag);
1079                         return -1;
1080                 }
1081                 flen = skb->len;
1082                 if (frag != 0)
1083                         flen -= hdrlen;
1084
1085                 if (frag_skb->tail + flen > frag_skb->end) {
1086                         printk(KERN_WARNING "%s: host decrypted and "
1087                                "reassembled frame did not fit skb\n",
1088                                __func__);
1089                         rtllib_frag_cache_invalidate(ieee, hdr);
1090                         return -1;
1091                 }
1092
1093                 if (frag == 0) {
1094                         /* copy first fragment (including full headers) into
1095                          * beginning of the fragment cache skb */
1096                         memcpy(skb_put(frag_skb, flen), skb->data, flen);
1097                 } else {
1098                         /* append frame payload to the end of the fragment
1099                          * cache skb */
1100                         memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
1101                                flen);
1102                 }
1103                 dev_kfree_skb_any(skb);
1104                 skb = NULL;
1105
1106                 if (fc & RTLLIB_FCTL_MOREFRAGS) {
1107                         /* more fragments expected - leave the skb in fragment
1108                          * cache for now; it will be delivered to upper layers
1109                          * after all fragments have been received */
1110                         return -2;
1111                 }
1112
1113                 /* this was the last fragment and the frame will be
1114                  * delivered, so remove skb from fragment cache */
1115                 skb = frag_skb;
1116                 hdr = (struct rtllib_hdr_4addr *) skb->data;
1117                 rtllib_frag_cache_invalidate(ieee, hdr);
1118         }
1119
1120         /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
1121          * encrypted/authenticated */
1122         if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) &&
1123                 rtllib_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
1124         {
1125                 printk("%s: ==>decrypt msdu error\n", __func__);
1126                 return -1;
1127         }
1128
1129         hdr = (struct rtllib_hdr_4addr *) skb->data;
1130         if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep) {
1131                 if (/*ieee->ieee802_1x &&*/
1132                     rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1133
1134                         /* pass unencrypted EAPOL frames even if encryption is
1135                          * configured */
1136                         struct eapol *eap = (struct eapol *)(skb->data +
1137                                 24);
1138                         RTLLIB_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1139                                                 eap_get_type(eap->type));
1140                 } else {
1141                         RTLLIB_DEBUG_DROP(
1142                                 "encryption configured, but RX "
1143                                 "frame not encrypted (SA=" MAC_FMT ")\n",
1144                                 MAC_ARG(hdr->addr2));
1145                         return -1;
1146                 }
1147         }
1148
1149         if (crypt && !(fc & RTLLIB_FCTL_WEP) &&
1150             rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1151                         struct eapol *eap = (struct eapol *)(skb->data +
1152                                 24);
1153                         RTLLIB_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1154                                                 eap_get_type(eap->type));
1155         }
1156
1157         if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep &&
1158             !rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1159                 RTLLIB_DEBUG_DROP(
1160                         "dropped unencrypted RX data "
1161                         "frame from " MAC_FMT
1162                         " (drop_unencrypted=1)\n",
1163                         MAC_ARG(hdr->addr2));
1164                 return -1;
1165         }
1166
1167         if (rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1168                 printk(KERN_WARNING "RX: IEEE802.1X EAPOL frame!\n");
1169         }
1170
1171         return 0;
1172 }
1173 void rtllib_rx_check_leave_lps(struct rtllib_device *ieee, u8 unicast, u8 nr_subframes)
1174 {
1175         if (unicast){
1176
1177                 if ((ieee->state == RTLLIB_LINKED) /*&& !MgntInitAdapterInProgress(pMgntInfo)*/)
1178                 {
1179                         if (    ((ieee->LinkDetectInfo.NumRxUnicastOkInPeriod +ieee->LinkDetectInfo.NumTxOkInPeriod) > 8 ) ||
1180                                 (ieee->LinkDetectInfo.NumRxUnicastOkInPeriod > 2) )
1181                         {
1182                                 if (ieee->LeisurePSLeave)
1183                                         ieee->LeisurePSLeave(ieee->dev);
1184                         }
1185                 }
1186         }
1187         ieee->last_rx_ps_time = jiffies;
1188 }
1189 void rtllib_rx_indicate_pkt_legacy(
1190                 struct rtllib_device *ieee,
1191                 struct rtllib_rx_stats *rx_stats,
1192                 struct rtllib_rxb* rxb,
1193                 u8 *dst,
1194                 u8 *src)
1195 {
1196         struct net_device *dev = ieee->dev;
1197         u16 ethertype;
1198         int i = 0;
1199
1200         if (rxb == NULL){
1201                 printk("%s: rxb is NULL!!\n", __func__);
1202                 return ;
1203         }
1204
1205         for (i = 0; i<rxb->nr_subframes; i++) {
1206                 struct sk_buff *sub_skb = rxb->subframes[i];
1207
1208                 if (sub_skb) {
1209                         /* convert hdr + possible LLC headers into Ethernet header */
1210                         ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
1211                         if (sub_skb->len >= 8 &&
1212                                         ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
1213                                           ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1214                                          memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
1215                                 /* remove RFC1042 or Bridge-Tunnel encapsulation and
1216                                  * replace EtherType */
1217                                 skb_pull(sub_skb, SNAP_SIZE);
1218                                 memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1219                                 memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1220                         } else {
1221                                 u16 len;
1222                                 /* Leave Ethernet header part of hdr and full payload */
1223                                 len = htons(sub_skb->len);
1224                                 memcpy(skb_push(sub_skb, 2), &len, 2);
1225                                 memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1226                                 memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1227                         }
1228
1229                         ieee->stats.rx_packets++;
1230                         ieee->stats.rx_bytes += sub_skb->len;
1231
1232                         if (is_multicast_ether_addr(dst)) {
1233                                 ieee->stats.multicast++;
1234                         }
1235
1236                         /* Indicat the packets to upper layer */
1237                         memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
1238                         sub_skb->protocol = eth_type_trans(sub_skb, dev);
1239                         sub_skb->dev = dev;
1240                         sub_skb->dev->stats.rx_packets++;
1241                         sub_skb->dev->stats.rx_bytes += sub_skb->len;
1242                         sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
1243                         netif_rx(sub_skb);
1244                 }
1245         }
1246         kfree(rxb);
1247         rxb = NULL;
1248 }
1249 int rtllib_rx_InfraAdhoc(struct rtllib_device *ieee, struct sk_buff *skb,
1250                  struct rtllib_rx_stats *rx_stats)
1251 {
1252         struct net_device *dev = ieee->dev;
1253         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1254         struct rtllib_crypt_data *crypt = NULL;
1255         struct rtllib_rxb* rxb = NULL;
1256         struct rx_ts_record *pTS = NULL;
1257         u16 fc, sc, SeqNum = 0;
1258         u8 type, stype, multicast = 0, unicast = 0, nr_subframes = 0, TID = 0;
1259         u8 dst[ETH_ALEN], src[ETH_ALEN], bssid[ETH_ALEN] = {0}, *payload;
1260         size_t hdrlen = 0;
1261         bool bToOtherSTA = false;
1262         int ret = 0, i = 0;
1263
1264         hdr = (struct rtllib_hdr_4addr *)skb->data;
1265         fc = le16_to_cpu(hdr->frame_ctl);
1266         type = WLAN_FC_GET_TYPE(fc);
1267         stype = WLAN_FC_GET_STYPE(fc);
1268         sc = le16_to_cpu(hdr->seq_ctl);
1269
1270         /*Filter pkt not to me*/
1271         multicast = is_multicast_ether_addr(hdr->addr1)|is_broadcast_ether_addr(hdr->addr1);
1272         unicast = !multicast;
1273         if (unicast && (compare_ether_addr(dev->dev_addr, hdr->addr1) != 0)) {
1274                 if (ieee->bNetPromiscuousMode)
1275                         bToOtherSTA = true;
1276                 else
1277                         goto rx_dropped;
1278         }
1279
1280         /*Filter pkt has too small length */
1281         hdrlen = rtllib_rx_get_hdrlen(ieee, skb, rx_stats);
1282         if (skb->len < hdrlen){
1283                 printk("%s():ERR!!! skb->len is smaller than hdrlen\n",__func__);
1284                 goto rx_dropped;
1285         }
1286
1287         /* Filter Duplicate pkt */
1288         ret = rtllib_rx_check_duplicate(ieee, skb, multicast);
1289         if (ret < 0)
1290                 goto rx_dropped;
1291
1292         /* Filter CTRL Frame */
1293         if (type == RTLLIB_FTYPE_CTL) {
1294                 goto rx_dropped;
1295         }
1296
1297         /* Filter MGNT Frame */
1298         if (type == RTLLIB_FTYPE_MGMT) {
1299                 if (bToOtherSTA)
1300                         goto rx_dropped;
1301                 if (rtllib_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
1302                         goto rx_dropped;
1303                 else
1304                         goto rx_exit;
1305         }
1306
1307         /* Filter WAPI DATA Frame */
1308
1309         /* Update statstics for AP roaming */
1310         if (!bToOtherSTA){
1311                 ieee->LinkDetectInfo.NumRecvDataInPeriod++;
1312                 ieee->LinkDetectInfo.NumRxOkInPeriod++;
1313         }
1314         dev->last_rx = jiffies;
1315
1316         /* Data frame - extract src/dst addresses */
1317         rtllib_rx_extract_addr(ieee, hdr, dst, src, bssid);
1318
1319         /* Filter Data frames */
1320         ret = rtllib_rx_data_filter(ieee, fc, dst, src, bssid, hdr->addr2);
1321         if (ret < 0)
1322                 goto rx_dropped;
1323
1324         if (skb->len == hdrlen){
1325                 goto rx_dropped;
1326         }
1327
1328         /* Send pspoll based on moredata */
1329         if ((ieee->iw_mode == IW_MODE_INFRA)  && (ieee->sta_sleep == LPS_IS_SLEEP)
1330                 && (ieee->polling) && (!bToOtherSTA)) {
1331                 if (WLAN_FC_MORE_DATA(fc)) {
1332                         /* more data bit is set, let's request a new frame from the AP */
1333                         rtllib_sta_ps_send_pspoll_frame(ieee);
1334                 } else {
1335                         ieee->polling =  false;
1336                 }
1337         }
1338
1339         /* Get crypt if encrypted */
1340         ret = rtllib_rx_get_crypt(ieee, skb, &crypt, hdrlen);
1341         if (ret == -1)
1342                 goto rx_dropped;
1343
1344         /* Decrypt data frame (including reassemble) */
1345         ret = rtllib_rx_decrypt(ieee, skb, rx_stats, crypt, hdrlen);
1346         if (ret == -1)
1347                 goto rx_dropped;
1348         else if (ret == -2)
1349                 goto rx_exit;
1350
1351         /* Get TS for Rx Reorder  */
1352         hdr = (struct rtllib_hdr_4addr *) skb->data;
1353         if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
1354                 && !is_multicast_ether_addr(hdr->addr1) && !is_broadcast_ether_addr(hdr->addr1)
1355                 && (!bToOtherSTA))
1356         {
1357                 TID = Frame_QoSTID(skb->data);
1358                 SeqNum = WLAN_GET_SEQ_SEQ(sc);
1359                 GetTs(ieee,(struct ts_common_info **) &pTS,hdr->addr2,TID,RX_DIR,true);
1360                 if (TID !=0 && TID !=3){
1361                         ieee->bis_any_nonbepkts = true;
1362                 }
1363         }
1364
1365         /* Parse rx data frame (For AMSDU) */
1366         /* skb: hdr + (possible reassembled) full plaintext payload */
1367         payload = skb->data + hdrlen;
1368         rxb = (struct rtllib_rxb*)kmalloc(sizeof(struct rtllib_rxb),GFP_ATOMIC);
1369         if (rxb == NULL)
1370         {
1371                 RTLLIB_DEBUG(RTLLIB_DL_ERR,"%s(): kmalloc rxb error\n",__func__);
1372                 goto rx_dropped;
1373         }
1374         /* to parse amsdu packets */
1375         /* qos data packets & reserved bit is 1 */
1376         if (parse_subframe(ieee,skb,rx_stats,rxb,src,dst) == 0) {
1377                 /* only to free rxb, and not submit the packets to upper layer */
1378                 for (i =0; i < rxb->nr_subframes; i++) {
1379                         dev_kfree_skb(rxb->subframes[i]);
1380                 }
1381                 kfree(rxb);
1382                 rxb = NULL;
1383                 goto rx_dropped;
1384         }
1385
1386         /* Update WAPI PN */
1387
1388         /* Check if leave LPS */
1389         if (!bToOtherSTA){
1390                 if (ieee->bIsAggregateFrame)
1391                         nr_subframes = rxb->nr_subframes;
1392                 else
1393                         nr_subframes = 1;
1394                 if (unicast)
1395                         ieee->LinkDetectInfo.NumRxUnicastOkInPeriod += nr_subframes;
1396                 rtllib_rx_check_leave_lps(ieee, unicast, nr_subframes);
1397         }
1398
1399         /* Indicate packets to upper layer or Rx Reorder */
1400         if (ieee->pHTInfo->bCurRxReorderEnable == false ||pTS == NULL || bToOtherSTA){
1401                 rtllib_rx_indicate_pkt_legacy(ieee, rx_stats, rxb, dst, src);
1402         }else{
1403                 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
1404         }
1405
1406         dev_kfree_skb(skb);
1407
1408  rx_exit:
1409         return 1;
1410
1411  rx_dropped:
1412         if (rxb != NULL)
1413         {
1414                 kfree(rxb);
1415                 rxb = NULL;
1416         }
1417         ieee->stats.rx_dropped++;
1418
1419         /* Returning 0 indicates to caller that we have not handled the SKB--
1420          * so it is still allocated and can be used again by underlying
1421          * hardware as a DMA target */
1422         return 0;
1423 }
1424
1425 int rtllib_rx_Master(struct rtllib_device *ieee, struct sk_buff *skb,
1426                  struct rtllib_rx_stats *rx_stats)
1427 {
1428         return 0;
1429 }
1430 int rtllib_rx_Monitor(struct rtllib_device *ieee, struct sk_buff *skb,
1431                  struct rtllib_rx_stats *rx_stats)
1432 {
1433         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1434         u16 fc = le16_to_cpu(hdr->frame_ctl);
1435         size_t hdrlen = rtllib_get_hdrlen(fc);
1436
1437         if (skb->len < hdrlen){
1438                 printk("%s():ERR!!! skb->len is smaller than hdrlen\n", __func__);
1439                 return 0;
1440         }
1441
1442         if (HTCCheck(ieee, skb->data)) {
1443                 if (net_ratelimit())
1444                         printk("%s: Find HTCControl!\n", __func__);
1445                 hdrlen += 4;
1446         }
1447
1448         rtllib_monitor_rx(ieee, skb, rx_stats, hdrlen);
1449         ieee->stats.rx_packets++;
1450         ieee->stats.rx_bytes += skb->len;
1451
1452         return 1;
1453 }
1454
1455 int rtllib_rx_Mesh(struct rtllib_device *ieee, struct sk_buff *skb,
1456                  struct rtllib_rx_stats *rx_stats)
1457 {
1458         return 0;
1459 }
1460
1461 /* All received frames are sent to this function. @skb contains the frame in
1462  * IEEE 802.11 format, i.e., in the format it was sent over air.
1463  * This function is called only as a tasklet (software IRQ). */
1464 int rtllib_rx(struct rtllib_device *ieee, struct sk_buff *skb,
1465                  struct rtllib_rx_stats *rx_stats)
1466 {
1467         int ret = 0;
1468
1469         if ((NULL==ieee) || (NULL==skb) || (NULL==rx_stats)){
1470                 printk(KERN_INFO "%s: Input parameters NULL!\n", __func__);
1471                 goto rx_dropped;
1472         }
1473         if (skb->len < 10) {
1474                 printk(KERN_INFO "%s: SKB length < 10 \n", __func__);
1475                 goto rx_dropped;
1476         }
1477
1478         switch (ieee->iw_mode) {
1479         case IW_MODE_ADHOC:
1480         case IW_MODE_INFRA:
1481                 ret = rtllib_rx_InfraAdhoc(ieee, skb, rx_stats);
1482                 break;
1483         case IW_MODE_MASTER:
1484         case IW_MODE_REPEAT:
1485                 ret = rtllib_rx_Master(ieee, skb, rx_stats);
1486                 break;
1487         case IW_MODE_MONITOR:
1488                 ret = rtllib_rx_Monitor(ieee, skb, rx_stats);
1489                 break;
1490         case IW_MODE_MESH:
1491                 ret = rtllib_rx_Mesh(ieee, skb, rx_stats);
1492                 break;
1493         default:
1494                 printk(KERN_INFO"%s: ERR iw mode!!!\n", __func__);
1495                 break;
1496         }
1497
1498         return ret;
1499
1500  rx_dropped:
1501         ieee->stats.rx_dropped++;
1502         return 0;
1503 }
1504
1505 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
1506
1507 /*
1508 * Make ther structure we read from the beacon packet has
1509 * the right values
1510 */
1511 static int rtllib_verify_qos_info(struct rtllib_qos_information_element
1512                                      *info_element, int sub_type)
1513 {
1514
1515         if (info_element->qui_subtype != sub_type)
1516                 return -1;
1517         if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
1518                 return -1;
1519         if (info_element->qui_type != QOS_OUI_TYPE)
1520                 return -1;
1521         if (info_element->version != QOS_VERSION_1)
1522                 return -1;
1523
1524         return 0;
1525 }
1526
1527
1528 /*
1529  * Parse a QoS parameter element
1530  */
1531 static int rtllib_read_qos_param_element(struct rtllib_qos_parameter_info
1532                                             *element_param, struct rtllib_info_element
1533                                             *info_element)
1534 {
1535         int ret = 0;
1536         u16 size = sizeof(struct rtllib_qos_parameter_info) - 2;
1537
1538         if ((info_element == NULL) || (element_param == NULL))
1539                 return -1;
1540
1541         if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
1542                 memcpy(element_param->info_element.qui, info_element->data,
1543                        info_element->len);
1544                 element_param->info_element.elementID = info_element->id;
1545                 element_param->info_element.length = info_element->len;
1546         } else
1547                 ret = -1;
1548         if (ret == 0)
1549                 ret = rtllib_verify_qos_info(&element_param->info_element,
1550                                                 QOS_OUI_PARAM_SUB_TYPE);
1551         return ret;
1552 }
1553
1554 /*
1555  * Parse a QoS information element
1556  */
1557 static int rtllib_read_qos_info_element(struct
1558                                            rtllib_qos_information_element
1559                                            *element_info, struct rtllib_info_element
1560                                            *info_element)
1561 {
1562         int ret = 0;
1563         u16 size = sizeof(struct rtllib_qos_information_element) - 2;
1564
1565         if (element_info == NULL)
1566                 return -1;
1567         if (info_element == NULL)
1568                 return -1;
1569
1570         if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
1571                 memcpy(element_info->qui, info_element->data,
1572                        info_element->len);
1573                 element_info->elementID = info_element->id;
1574                 element_info->length = info_element->len;
1575         } else
1576                 ret = -1;
1577
1578         if (ret == 0)
1579                 ret = rtllib_verify_qos_info(element_info,
1580                                                 QOS_OUI_INFO_SUB_TYPE);
1581         return ret;
1582 }
1583
1584
1585 /*
1586  * Write QoS parameters from the ac parameters.
1587  */
1588 static int rtllib_qos_convert_ac_to_parameters(struct rtllib_qos_parameter_info *param_elm,
1589                 struct rtllib_qos_data *qos_data)
1590 {
1591         struct rtllib_qos_ac_parameter *ac_params;
1592         struct rtllib_qos_parameters *qos_param = &(qos_data->parameters);
1593         int rc = 0;
1594         int i;
1595         u8 aci;
1596         u8 acm;
1597
1598         qos_data->wmm_acm = 0;
1599         for (i = 0; i < QOS_QUEUE_NUM; i++) {
1600                 ac_params = &(param_elm->ac_params_record[i]);
1601
1602                 aci = (ac_params->aci_aifsn & 0x60) >> 5;
1603                 acm = (ac_params->aci_aifsn & 0x10) >> 4;
1604
1605                 if (aci >= QOS_QUEUE_NUM)
1606                         continue;
1607                 switch (aci) {
1608                         case 1:
1609                                 /* BIT(0) | BIT(3) */
1610                                 if (acm)
1611                                         qos_data->wmm_acm |= (0x01<<0)|(0x01<<3);
1612                                 break;
1613                         case 2:
1614                                 /* BIT(4) | BIT(5) */
1615                                 if (acm)
1616                                         qos_data->wmm_acm |= (0x01<<4)|(0x01<<5);
1617                                 break;
1618                         case 3:
1619                                 /* BIT(6) | BIT(7) */
1620                                 if (acm)
1621                                         qos_data->wmm_acm |= (0x01<<6)|(0x01<<7);
1622                                 break;
1623                         case 0:
1624                         default:
1625                                 /* BIT(1) | BIT(2) */
1626                                 if (acm)
1627                                         qos_data->wmm_acm |= (0x01<<1)|(0x01<<2);
1628                                 break;
1629                 }
1630
1631                 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
1632
1633                 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
1634                 qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2:qos_param->aifs[aci];
1635
1636                 qos_param->cw_min[aci] = ac_params->ecw_min_max & 0x0F;
1637
1638                 qos_param->cw_max[aci] = (ac_params->ecw_min_max & 0xF0) >> 4;
1639
1640                 qos_param->flag[aci] =
1641                     (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1642                 qos_param->tx_op_limit[aci] = le16_to_cpu(ac_params->tx_op_limit);
1643         }
1644         return rc;
1645 }
1646
1647 /*
1648  * we have a generic data element which it may contain QoS information or
1649  * parameters element. check the information element length to decide
1650  * which type to read
1651  */
1652 static int rtllib_parse_qos_info_param_IE(struct rtllib_info_element
1653                                              *info_element,
1654                                              struct rtllib_network *network)
1655 {
1656         int rc = 0;
1657         struct rtllib_qos_information_element qos_info_element;
1658
1659         rc = rtllib_read_qos_info_element(&qos_info_element, info_element);
1660
1661         if (rc == 0) {
1662                 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1663                 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1664         } else {
1665                 struct rtllib_qos_parameter_info param_element;
1666
1667                 rc = rtllib_read_qos_param_element(&param_element,
1668                                                       info_element);
1669                 if (rc == 0) {
1670                         rtllib_qos_convert_ac_to_parameters(&param_element,
1671                                                                &(network->qos_data));
1672                         network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1673                         network->qos_data.param_count =
1674                             param_element.info_element.ac_info & 0x0F;
1675                 }
1676         }
1677
1678         if (rc == 0) {
1679                 RTLLIB_DEBUG_QOS("QoS is supported\n");
1680                 network->qos_data.supported = 1;
1681         }
1682         return rc;
1683 }
1684
1685 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1686
1687 static const char *get_info_element_string(u16 id)
1688 {
1689         switch (id) {
1690                 MFIE_STRING(SSID);
1691                 MFIE_STRING(RATES);
1692                 MFIE_STRING(FH_SET);
1693                 MFIE_STRING(DS_SET);
1694                 MFIE_STRING(CF_SET);
1695                 MFIE_STRING(TIM);
1696                 MFIE_STRING(IBSS_SET);
1697                 MFIE_STRING(COUNTRY);
1698                 MFIE_STRING(HOP_PARAMS);
1699                 MFIE_STRING(HOP_TABLE);
1700                 MFIE_STRING(REQUEST);
1701                 MFIE_STRING(CHALLENGE);
1702                 MFIE_STRING(POWER_CONSTRAINT);
1703                 MFIE_STRING(POWER_CAPABILITY);
1704                 MFIE_STRING(TPC_REQUEST);
1705                 MFIE_STRING(TPC_REPORT);
1706                 MFIE_STRING(SUPP_CHANNELS);
1707                 MFIE_STRING(CSA);
1708                 MFIE_STRING(MEASURE_REQUEST);
1709                 MFIE_STRING(MEASURE_REPORT);
1710                 MFIE_STRING(QUIET);
1711                 MFIE_STRING(IBSS_DFS);
1712                 MFIE_STRING(RSN);
1713                 MFIE_STRING(RATES_EX);
1714                 MFIE_STRING(GENERIC);
1715                 MFIE_STRING(QOS_PARAMETER);
1716         default:
1717                 return "UNKNOWN";
1718         }
1719 }
1720
1721 static inline void rtllib_extract_country_ie(
1722         struct rtllib_device *ieee,
1723         struct rtllib_info_element *info_element,
1724         struct rtllib_network *network,
1725         u8 * addr2)
1726 {
1727         if (IS_DOT11D_ENABLE(ieee)) {
1728                 if (info_element->len!= 0) {
1729                         memcpy(network->CountryIeBuf, info_element->data, info_element->len);
1730                         network->CountryIeLen = info_element->len;
1731
1732                         if (!IS_COUNTRY_IE_VALID(ieee))
1733                         {
1734                                 if ((rtllib_act_scanning(ieee,false) == true) && (ieee->FirstIe_InScan == 1))
1735                                         printk("Received beacon ContryIE, SSID: <%s>\n",network->ssid);
1736                                 Dot11d_UpdateCountryIe(ieee, addr2, info_element->len, info_element->data);
1737                         }
1738                 }
1739
1740                 if (IS_EQUAL_CIE_SRC(ieee, addr2)) {
1741                         UPDATE_CIE_WATCHDOG(ieee);
1742                 }
1743         }
1744
1745 }
1746
1747 int rtllib_parse_info_param(struct rtllib_device *ieee,
1748                 struct rtllib_info_element *info_element,
1749                 u16 length,
1750                 struct rtllib_network *network,
1751                 struct rtllib_rx_stats *stats)
1752 {
1753         u8 i;
1754         short offset;
1755         u16     tmp_htcap_len=0;
1756         u16     tmp_htinfo_len=0;
1757         u16 ht_realtek_agg_len=0;
1758         u8  ht_realtek_agg_buf[MAX_IE_LEN];
1759         char rates_str[64];
1760         char *p;
1761
1762         while (length >= sizeof(*info_element)) {
1763                 if (sizeof(*info_element) + info_element->len > length) {
1764                         RTLLIB_DEBUG_MGMT("Info elem: parse failed: "
1765                                              "info_element->len + 2 > left : "
1766                                              "info_element->len+2=%zd left=%d, id=%d.\n",
1767                                              info_element->len +
1768                                              sizeof(*info_element),
1769                                              length, info_element->id);
1770                         /* We stop processing but don't return an error here
1771                          * because some misbehaviour APs break this rule. ie.
1772                          * Orinoco AP1000. */
1773                         break;
1774                 }
1775
1776                 switch (info_element->id) {
1777                 case MFIE_TYPE_SSID:
1778                         if (rtllib_is_empty_essid(info_element->data,
1779                                                      info_element->len)) {
1780                                 network->flags |= NETWORK_EMPTY_ESSID;
1781                                 break;
1782                         }
1783
1784                         network->ssid_len = min(info_element->len,
1785                                                 (u8) IW_ESSID_MAX_SIZE);
1786                         memcpy(network->ssid, info_element->data, network->ssid_len);
1787                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
1788                                 memset(network->ssid + network->ssid_len, 0,
1789                                        IW_ESSID_MAX_SIZE - network->ssid_len);
1790
1791                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1792                                              network->ssid, network->ssid_len);
1793                         break;
1794
1795                 case MFIE_TYPE_RATES:
1796                         p = rates_str;
1797                         network->rates_len = min(info_element->len,
1798                                                  MAX_RATES_LENGTH);
1799                         for (i = 0; i < network->rates_len; i++) {
1800                                 network->rates[i] = info_element->data[i];
1801                                 p += snprintf(p, sizeof(rates_str) -
1802                                               (p - rates_str), "%02X ",
1803                                               network->rates[i]);
1804                                 if (rtllib_is_ofdm_rate
1805                                     (info_element->data[i])) {
1806                                         network->flags |= NETWORK_HAS_OFDM;
1807                                         if (info_element->data[i] &
1808                                             RTLLIB_BASIC_RATE_MASK)
1809                                                 network->flags &=
1810                                                     ~NETWORK_HAS_CCK;
1811                                 }
1812
1813                                 if (rtllib_is_cck_rate
1814                                     (info_element->data[i])) {
1815                                         network->flags |= NETWORK_HAS_CCK;
1816                                 }
1817                         }
1818
1819                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1820                                              rates_str, network->rates_len);
1821                         break;
1822
1823                 case MFIE_TYPE_RATES_EX:
1824                         p = rates_str;
1825                         network->rates_ex_len = min(info_element->len,
1826                                                     MAX_RATES_EX_LENGTH);
1827                         for (i = 0; i < network->rates_ex_len; i++) {
1828                                 network->rates_ex[i] = info_element->data[i];
1829                                 p += snprintf(p, sizeof(rates_str) -
1830                                               (p - rates_str), "%02X ",
1831                                               network->rates[i]);
1832                                 if (rtllib_is_ofdm_rate
1833                                     (info_element->data[i])) {
1834                                         network->flags |= NETWORK_HAS_OFDM;
1835                                         if (info_element->data[i] &
1836                                             RTLLIB_BASIC_RATE_MASK)
1837                                                 network->flags &=
1838                                                     ~NETWORK_HAS_CCK;
1839                                 }
1840                         }
1841
1842                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1843                                              rates_str, network->rates_ex_len);
1844                         break;
1845
1846                 case MFIE_TYPE_DS_SET:
1847                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1848                                              info_element->data[0]);
1849                         network->channel = info_element->data[0];
1850                         break;
1851
1852                 case MFIE_TYPE_FH_SET:
1853                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1854                         break;
1855
1856                 case MFIE_TYPE_CF_SET:
1857                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1858                         break;
1859
1860                 case MFIE_TYPE_TIM:
1861                         if (info_element->len < 4)
1862                                 break;
1863
1864                         network->tim.tim_count = info_element->data[0];
1865                         network->tim.tim_period = info_element->data[1];
1866
1867                         network->dtim_period = info_element->data[1];
1868                         if (ieee->state != RTLLIB_LINKED)
1869                                 break;
1870                         network->last_dtim_sta_time[0] = jiffies;
1871                         network->last_dtim_sta_time[1] = stats->mac_time[1];
1872
1873                         network->dtim_data = RTLLIB_DTIM_VALID;
1874
1875
1876                         if (info_element->data[2] & 1)
1877                                 network->dtim_data |= RTLLIB_DTIM_MBCAST;
1878
1879                         offset = (info_element->data[2] >> 1)*2;
1880
1881
1882                         if (ieee->assoc_id < 8*offset ||
1883                                 ieee->assoc_id > 8*(offset + info_element->len -3))
1884
1885                                 break;
1886
1887                         offset = (ieee->assoc_id / 8) - offset;
1888                         if (info_element->data[3+offset] & (1<<(ieee->assoc_id%8)))
1889                                 network->dtim_data |= RTLLIB_DTIM_UCAST;
1890
1891                         network->listen_interval = network->dtim_period;
1892                         break;
1893
1894                 case MFIE_TYPE_ERP:
1895                         network->erp_value = info_element->data[0];
1896                         network->flags |= NETWORK_HAS_ERP_VALUE;
1897                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1898                                              network->erp_value);
1899                         break;
1900                 case MFIE_TYPE_IBSS_SET:
1901                         network->atim_window = info_element->data[0];
1902                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1903                                              network->atim_window);
1904                         break;
1905
1906                 case MFIE_TYPE_CHALLENGE:
1907                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1908                         break;
1909
1910                 case MFIE_TYPE_GENERIC:
1911                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1912                                              info_element->len);
1913                         if (!rtllib_parse_qos_info_param_IE(info_element,
1914                                                                network))
1915                                 break;
1916                         if (info_element->len >= 4 &&
1917                             info_element->data[0] == 0x00 &&
1918                             info_element->data[1] == 0x50 &&
1919                             info_element->data[2] == 0xf2 &&
1920                             info_element->data[3] == 0x01) {
1921                                 network->wpa_ie_len = min(info_element->len + 2,
1922                                                           MAX_WPA_IE_LEN);
1923                                 memcpy(network->wpa_ie, info_element,
1924                                        network->wpa_ie_len);
1925                                 break;
1926                         }
1927                         if (info_element->len == 7 &&
1928                             info_element->data[0] == 0x00 &&
1929                             info_element->data[1] == 0xe0 &&
1930                             info_element->data[2] == 0x4c &&
1931                             info_element->data[3] == 0x01 &&
1932                             info_element->data[4] == 0x02)
1933                                 network->Turbo_Enable = 1;
1934
1935                         if (tmp_htcap_len == 0) {
1936                                 if (info_element->len >= 4 &&
1937                                    info_element->data[0] == 0x00 &&
1938                                    info_element->data[1] == 0x90 &&
1939                                    info_element->data[2] == 0x4c &&
1940                                    info_element->data[3] == 0x033) {
1941
1942                                                 tmp_htcap_len = min(info_element->len,(u8)MAX_IE_LEN);
1943                                                 if (tmp_htcap_len != 0){
1944                                                         network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1945                                                         network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf)?\
1946                                                                 sizeof(network->bssht.bdHTCapBuf):tmp_htcap_len;
1947                                                         memcpy(network->bssht.bdHTCapBuf,info_element->data,network->bssht.bdHTCapLen);
1948                                                 }
1949                                 }
1950                                 if (tmp_htcap_len != 0){
1951                                         network->bssht.bdSupportHT = true;
1952                                         network->bssht.bdHT1R = ((((struct ht_capab_ele *)(network->bssht.bdHTCapBuf))->MCS[1]) == 0);
1953                                 }else{
1954                                         network->bssht.bdSupportHT = false;
1955                                         network->bssht.bdHT1R = false;
1956                                 }
1957                         }
1958
1959
1960                         if (tmp_htinfo_len == 0){
1961                                 if (info_element->len >= 4 &&
1962                                         info_element->data[0] == 0x00 &&
1963                                         info_element->data[1] == 0x90 &&
1964                                         info_element->data[2] == 0x4c &&
1965                                         info_element->data[3] == 0x034){
1966
1967                                                 tmp_htinfo_len = min(info_element->len,(u8)MAX_IE_LEN);
1968                                                 if (tmp_htinfo_len != 0){
1969                                                         network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1970                                                         if (tmp_htinfo_len){
1971                                                                 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf)?\
1972                                                                         sizeof(network->bssht.bdHTInfoBuf):tmp_htinfo_len;
1973                                                                 memcpy(network->bssht.bdHTInfoBuf,info_element->data,network->bssht.bdHTInfoLen);
1974                                                         }
1975
1976                                                 }
1977
1978                                 }
1979                         }
1980
1981                         if (ieee->aggregation){
1982                                 if (network->bssht.bdSupportHT){
1983                                         if (info_element->len >= 4 &&
1984                                                 info_element->data[0] == 0x00 &&
1985                                                 info_element->data[1] == 0xe0 &&
1986                                                 info_element->data[2] == 0x4c &&
1987                                                 info_element->data[3] == 0x02){
1988
1989                                                 ht_realtek_agg_len = min(info_element->len,(u8)MAX_IE_LEN);
1990                                                 memcpy(ht_realtek_agg_buf,info_element->data,info_element->len);
1991
1992                                         }
1993                                         if (ht_realtek_agg_len >= 5){
1994                                                 network->realtek_cap_exit = true;
1995                                                 network->bssht.bdRT2RTAggregation = true;
1996
1997                                                 if ((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02))
1998                                                 network->bssht.bdRT2RTLongSlotTime = true;
1999
2000                                                 if ((ht_realtek_agg_buf[4]==1) && (ht_realtek_agg_buf[5] & RT_HT_CAP_USE_92SE))
2001                                                 {
2002                                                         network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_92SE;
2003                                                 }
2004                                         }
2005                                 }
2006                                 if (ht_realtek_agg_len >= 5){
2007                                         if ((ht_realtek_agg_buf[5] & RT_HT_CAP_USE_SOFTAP))
2008                                                 network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_SOFTAP;
2009                                 }
2010                         }
2011
2012                         {
2013                                 if ((info_element->len >= 3 &&
2014                                          info_element->data[0] == 0x00 &&
2015                                          info_element->data[1] == 0x05 &&
2016                                          info_element->data[2] == 0xb5) ||
2017                                          (info_element->len >= 3 &&
2018                                          info_element->data[0] == 0x00 &&
2019                                          info_element->data[1] == 0x0a &&
2020                                          info_element->data[2] == 0xf7) ||
2021                                          (info_element->len >= 3 &&
2022                                          info_element->data[0] == 0x00 &&
2023                                          info_element->data[1] == 0x10 &&
2024                                          info_element->data[2] == 0x18)){
2025
2026                                                 network->broadcom_cap_exist = true;
2027
2028                                 }
2029                         }
2030                         if (info_element->len >= 3 &&
2031                                 info_element->data[0] == 0x00 &&
2032                                 info_element->data[1] == 0x0c &&
2033                                 info_element->data[2] == 0x43)
2034                         {
2035                                 network->ralink_cap_exist = true;
2036                         }
2037                         if ((info_element->len >= 3 &&
2038                                 info_element->data[0] == 0x00 &&
2039                                 info_element->data[1] == 0x03 &&
2040                                 info_element->data[2] == 0x7f) ||
2041                                 (info_element->len >= 3 &&
2042                                 info_element->data[0] == 0x00 &&
2043                                 info_element->data[1] == 0x13 &&
2044                                 info_element->data[2] == 0x74))
2045                         {
2046                                 network->atheros_cap_exist = true;
2047                         }
2048
2049                         if ((info_element->len >= 3 &&
2050                                 info_element->data[0] == 0x00 &&
2051                                 info_element->data[1] == 0x50 &&
2052                                 info_element->data[2] == 0x43) )
2053                                 {
2054                                         network->marvell_cap_exist = true;
2055                                 }
2056                         if (info_element->len >= 3 &&
2057                                 info_element->data[0] == 0x00 &&
2058                                 info_element->data[1] == 0x40 &&
2059                                 info_element->data[2] == 0x96)
2060                         {
2061                                 network->cisco_cap_exist = true;
2062                         }
2063
2064
2065                         if (info_element->len >= 3 &&
2066                                 info_element->data[0] == 0x00 &&
2067                                 info_element->data[1] == 0x0a &&
2068                                 info_element->data[2] == 0xf5)
2069                         {
2070                                 network->airgo_cap_exist = true;
2071                         }
2072
2073                         if (info_element->len > 4 &&
2074                                 info_element->data[0] == 0x00 &&
2075                                 info_element->data[1] == 0x40 &&
2076                                 info_element->data[2] == 0x96 &&
2077                                 info_element->data[3] == 0x01)
2078                         {
2079                                 if (info_element->len == 6)
2080                                 {
2081                                         memcpy(network->CcxRmState, &info_element[4], 2);
2082                                         if (network->CcxRmState[0] != 0)
2083                                         {
2084                                                 network->bCcxRmEnable = true;
2085                                         }
2086                                         else
2087                                                 network->bCcxRmEnable = false;
2088                                         network->MBssidMask = network->CcxRmState[1] & 0x07;
2089                                         if (network->MBssidMask != 0)
2090                                         {
2091                                                 network->bMBssidValid = true;
2092                                                 network->MBssidMask = 0xff << (network->MBssidMask);
2093                                                 memcpy(network->MBssid, network->bssid, ETH_ALEN);
2094                                                 network->MBssid[5] &= network->MBssidMask;
2095                                         }
2096                                         else
2097                                         {
2098                                                 network->bMBssidValid = false;
2099                                         }
2100                                 }
2101                                 else
2102                                 {
2103                                         network->bCcxRmEnable = false;
2104                                 }
2105                         }
2106                         if (info_element->len > 4  &&
2107                                 info_element->data[0] == 0x00 &&
2108                                 info_element->data[1] == 0x40 &&
2109                                 info_element->data[2] == 0x96 &&
2110                                 info_element->data[3] == 0x03)
2111                         {
2112                                 if (info_element->len == 5)
2113                                 {
2114                                         network->bWithCcxVerNum = true;
2115                                         network->BssCcxVerNumber = info_element->data[4];
2116                                 }
2117                                 else
2118                                 {
2119                                         network->bWithCcxVerNum = false;
2120                                         network->BssCcxVerNumber = 0;
2121                                 }
2122                         }
2123                         if (info_element->len > 4  &&
2124                                 info_element->data[0] == 0x00 &&
2125                                 info_element->data[1] == 0x50 &&
2126                                 info_element->data[2] == 0xf2 &&
2127                                 info_element->data[3] == 0x04)
2128                         {
2129                                 RTLLIB_DEBUG_MGMT("MFIE_TYPE_WZC: %d bytes\n",
2130                                                      info_element->len);
2131                                 network->wzc_ie_len = min(info_element->len+2,
2132                                                           MAX_WZC_IE_LEN);
2133                                 memcpy(network->wzc_ie, info_element,
2134                                                 network->wzc_ie_len);
2135                         }
2136                         break;
2137
2138                 case MFIE_TYPE_RSN:
2139                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
2140                                              info_element->len);
2141                         network->rsn_ie_len = min(info_element->len + 2,
2142                                                   MAX_WPA_IE_LEN);
2143                         memcpy(network->rsn_ie, info_element,
2144                                network->rsn_ie_len);
2145                         break;
2146
2147                 case MFIE_TYPE_HT_CAP:
2148                         RTLLIB_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n",
2149                                              info_element->len);
2150                         tmp_htcap_len = min(info_element->len,(u8)MAX_IE_LEN);
2151                         if (tmp_htcap_len != 0){
2152                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
2153                                 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf)?\
2154                                         sizeof(network->bssht.bdHTCapBuf):tmp_htcap_len;
2155                                 memcpy(network->bssht.bdHTCapBuf,info_element->data,network->bssht.bdHTCapLen);
2156
2157                                 network->bssht.bdSupportHT = true;
2158                                 network->bssht.bdHT1R = ((((struct ht_capab_ele *)(network->bssht.bdHTCapBuf))->MCS[1]) == 0);
2159
2160                                 network->bssht.bdBandWidth = (enum ht_channel_width)(((struct ht_capab_ele *)(network->bssht.bdHTCapBuf))->ChlWidth);
2161                         }
2162                         else{
2163                                 network->bssht.bdSupportHT = false;
2164                                 network->bssht.bdHT1R = false;
2165                                 network->bssht.bdBandWidth = HT_CHANNEL_WIDTH_20 ;
2166                         }
2167                         break;
2168
2169
2170                 case MFIE_TYPE_HT_INFO:
2171                         RTLLIB_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n",
2172                                              info_element->len);
2173                         tmp_htinfo_len = min(info_element->len,(u8)MAX_IE_LEN);
2174                         if (tmp_htinfo_len){
2175                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
2176                                 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf)?\
2177                                         sizeof(network->bssht.bdHTInfoBuf):tmp_htinfo_len;
2178                                 memcpy(network->bssht.bdHTInfoBuf,info_element->data,network->bssht.bdHTInfoLen);
2179                         }
2180                         break;
2181
2182                 case MFIE_TYPE_AIRONET:
2183                         RTLLIB_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n",
2184                                              info_element->len);
2185                         if (info_element->len >IE_CISCO_FLAG_POSITION)
2186                         {
2187                                 network->bWithAironetIE = true;
2188
2189                                 if (    (info_element->data[IE_CISCO_FLAG_POSITION]&SUPPORT_CKIP_MIC)   ||
2190                                         (info_element->data[IE_CISCO_FLAG_POSITION]&SUPPORT_CKIP_PK)    )
2191                                 {
2192                                         network->bCkipSupported = true;
2193                                 }
2194                                 else
2195                                 {
2196                                         network->bCkipSupported = false;
2197                                 }
2198                         }
2199                         else
2200                         {
2201                                 network->bWithAironetIE = false;
2202                                 network->bCkipSupported = false;
2203                         }
2204                         break;
2205                 case MFIE_TYPE_QOS_PARAMETER:
2206                         printk(KERN_ERR
2207                                "QoS Error need to parse QOS_PARAMETER IE\n");
2208                         break;
2209
2210                 case MFIE_TYPE_COUNTRY:
2211                         RTLLIB_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
2212                                              info_element->len);
2213                         rtllib_extract_country_ie(ieee, info_element, network, network->bssid);
2214                         break;
2215 /* TODO */
2216                 default:
2217                         RTLLIB_DEBUG_MGMT
2218                             ("Unsupported info element: %s (%d)\n",
2219                              get_info_element_string(info_element->id),
2220                              info_element->id);
2221                         break;
2222                 }
2223
2224                 length -= sizeof(*info_element) + info_element->len;
2225                 info_element =
2226                     (struct rtllib_info_element *)&info_element->
2227                     data[info_element->len];
2228         }
2229
2230         if (!network->atheros_cap_exist && !network->broadcom_cap_exist &&
2231                 !network->cisco_cap_exist && !network->ralink_cap_exist && !network->bssht.bdRT2RTAggregation)
2232         {
2233                 network->unknown_cap_exist = true;
2234         }
2235         else
2236         {
2237                 network->unknown_cap_exist = false;
2238         }
2239         return 0;
2240 }
2241
2242 static inline u8 rtllib_SignalStrengthTranslate(
2243         u8  CurrSS
2244         )
2245 {
2246         u8 RetSS;
2247
2248         if (CurrSS >= 71 && CurrSS <= 100)
2249         {
2250                 RetSS = 90 + ((CurrSS - 70) / 3);
2251         }
2252         else if (CurrSS >= 41 && CurrSS <= 70)
2253         {
2254                 RetSS = 78 + ((CurrSS - 40) / 3);
2255         }
2256         else if (CurrSS >= 31 && CurrSS <= 40)
2257         {
2258                 RetSS = 66 + (CurrSS - 30);
2259         }
2260         else if (CurrSS >= 21 && CurrSS <= 30)
2261         {
2262                 RetSS = 54 + (CurrSS - 20);
2263         }
2264         else if (CurrSS >= 5 && CurrSS <= 20)
2265         {
2266                 RetSS = 42 + (((CurrSS - 5) * 2) / 3);
2267         }
2268         else if (CurrSS == 4)
2269         {
2270                 RetSS = 36;
2271         }
2272         else if (CurrSS == 3)
2273         {
2274                 RetSS = 27;
2275         }
2276         else if (CurrSS == 2)
2277         {
2278                 RetSS = 18;
2279         }
2280         else if (CurrSS == 1)
2281         {
2282                 RetSS = 9;
2283         }
2284         else
2285         {
2286                 RetSS = CurrSS;
2287         }
2288
2289
2290
2291         return RetSS;
2292 }
2293
2294 long rtllib_translate_todbm(u8 signal_strength_index    )
2295 {
2296         long    signal_power;
2297
2298         signal_power = (long)((signal_strength_index + 1) >> 1);
2299         signal_power -= 95;
2300
2301         return signal_power;
2302 }
2303
2304 static inline int rtllib_network_init(
2305         struct rtllib_device *ieee,
2306         struct rtllib_probe_response *beacon,
2307         struct rtllib_network *network,
2308         struct rtllib_rx_stats *stats)
2309 {
2310
2311         /*
2312         network->qos_data.active = 0;
2313         network->qos_data.supported = 0;
2314         network->qos_data.param_count = 0;
2315         network->qos_data.old_param_count = 0;
2316         */
2317         memset(&network->qos_data, 0, sizeof(struct rtllib_qos_data));
2318
2319         /* Pull out fixed field data */
2320         memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
2321         network->capability = le16_to_cpu(beacon->capability);
2322         network->last_scanned = jiffies;
2323         network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
2324         network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
2325         network->beacon_interval = le32_to_cpu(beacon->beacon_interval);
2326         /* Where to pull this? beacon->listen_interval;*/
2327         network->listen_interval = 0x0A;
2328         network->rates_len = network->rates_ex_len = 0;
2329         network->last_associate = 0;
2330         network->ssid_len = 0;
2331         network->hidden_ssid_len = 0;
2332         memset(network->hidden_ssid, 0, sizeof(network->hidden_ssid));
2333         network->flags = 0;
2334         network->atim_window = 0;
2335         network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
2336             0x3 : 0x0;
2337         network->berp_info_valid = false;
2338         network->broadcom_cap_exist = false;
2339         network->ralink_cap_exist = false;
2340         network->atheros_cap_exist = false;
2341         network->cisco_cap_exist = false;
2342         network->unknown_cap_exist = false;
2343         network->realtek_cap_exit = false;
2344         network->marvell_cap_exist = false;
2345         network->airgo_cap_exist = false;
2346         network->Turbo_Enable = 0;
2347         network->SignalStrength = stats->SignalStrength;
2348         network->RSSI = stats->SignalStrength;
2349         network->CountryIeLen = 0;
2350         memset(network->CountryIeBuf, 0, MAX_IE_LEN);
2351         HTInitializeBssDesc(&network->bssht);
2352         if (stats->freq == RTLLIB_52GHZ_BAND) {
2353                 /* for A band (No DS info) */
2354                 network->channel = stats->received_channel;
2355         } else
2356                 network->flags |= NETWORK_HAS_CCK;
2357
2358         network->wpa_ie_len = 0;
2359         network->rsn_ie_len = 0;
2360         network->wzc_ie_len = 0;
2361
2362         if (rtllib_parse_info_param(ieee,
2363                         beacon->info_element,
2364                         (stats->len - sizeof(*beacon)),
2365                         network,
2366                         stats))
2367                 return 1;
2368
2369         network->mode = 0;
2370         if (stats->freq == RTLLIB_52GHZ_BAND)
2371                 network->mode = IEEE_A;
2372         else {
2373                 if (network->flags & NETWORK_HAS_OFDM)
2374                         network->mode |= IEEE_G;
2375                 if (network->flags & NETWORK_HAS_CCK)
2376                         network->mode |= IEEE_B;
2377         }
2378
2379         if (network->mode == 0) {
2380                 RTLLIB_DEBUG_SCAN("Filtered out '%s (" MAC_FMT ")' "
2381                                      "network.\n",
2382                                      escape_essid(network->ssid,
2383                                                   network->ssid_len),
2384                                      MAC_ARG(network->bssid));
2385                 return 1;
2386         }
2387
2388         if (network->bssht.bdSupportHT){
2389                 if (network->mode == IEEE_A)
2390                         network->mode = IEEE_N_5G;
2391                 else if (network->mode & (IEEE_G | IEEE_B))
2392                         network->mode = IEEE_N_24G;
2393         }
2394         if (rtllib_is_empty_essid(network->ssid, network->ssid_len))
2395                 network->flags |= NETWORK_EMPTY_ESSID;
2396         stats->signal = 30 + (stats->SignalStrength * 70) / 100;
2397         stats->noise = rtllib_translate_todbm((u8)(100-stats->signal)) -25;
2398
2399         memcpy(&network->stats, stats, sizeof(network->stats));
2400
2401         return 0;
2402 }
2403
2404 static inline int is_same_network(struct rtllib_network *src,
2405                                   struct rtllib_network *dst, u8 ssidbroad)
2406 {
2407         /* A network is only a duplicate if the channel, BSSID, ESSID
2408          * and the capability field (in particular IBSS and BSS) all match.
2409          * We treat all <hidden> with the same BSSID and channel
2410          * as one network */
2411         return
2412                 (((src->ssid_len == dst->ssid_len) || (!ssidbroad)) &&
2413                 (src->channel == dst->channel) &&
2414                 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
2415                 (!memcmp(src->ssid, dst->ssid, src->ssid_len) || (!ssidbroad)) &&
2416                 ((src->capability & WLAN_CAPABILITY_IBSS) ==
2417                 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
2418                 ((src->capability & WLAN_CAPABILITY_ESS) ==
2419                 (dst->capability & WLAN_CAPABILITY_ESS)));
2420 }
2421
2422 static inline void update_ibss_network(struct rtllib_network *dst,
2423                                   struct rtllib_network *src)
2424 {
2425         memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats));
2426         dst->last_scanned = jiffies;
2427 }
2428
2429
2430 static inline void update_network(struct rtllib_network *dst,
2431                                   struct rtllib_network *src)
2432 {
2433         int qos_active;
2434         u8 old_param;
2435
2436         memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats));
2437         dst->capability = src->capability;
2438         memcpy(dst->rates, src->rates, src->rates_len);
2439         dst->rates_len = src->rates_len;
2440         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
2441         dst->rates_ex_len = src->rates_ex_len;
2442         if (src->ssid_len > 0)
2443         {
2444                 if (dst->ssid_len == 0)
2445                 {
2446                         memset(dst->hidden_ssid, 0, sizeof(dst->hidden_ssid));
2447                         dst->hidden_ssid_len = src->ssid_len;
2448                         memcpy(dst->hidden_ssid, src->ssid, src->ssid_len);
2449                 }else{
2450                         memset(dst->ssid, 0, dst->ssid_len);
2451                         dst->ssid_len = src->ssid_len;
2452                         memcpy(dst->ssid, src->ssid, src->ssid_len);
2453                 }
2454         }
2455         dst->mode = src->mode;
2456         dst->flags = src->flags;
2457         dst->time_stamp[0] = src->time_stamp[0];
2458         dst->time_stamp[1] = src->time_stamp[1];
2459         if (src->flags & NETWORK_HAS_ERP_VALUE)
2460         {
2461                 dst->erp_value = src->erp_value;
2462                 dst->berp_info_valid = src->berp_info_valid = true;
2463         }
2464         dst->beacon_interval = src->beacon_interval;
2465         dst->listen_interval = src->listen_interval;
2466         dst->atim_window = src->atim_window;
2467         dst->dtim_period = src->dtim_period;
2468         dst->dtim_data = src->dtim_data;
2469         dst->last_dtim_sta_time[0] = src->last_dtim_sta_time[0];
2470         dst->last_dtim_sta_time[1] = src->last_dtim_sta_time[1];
2471         memcpy(&dst->tim, &src->tim, sizeof(struct rtllib_tim_parameters));
2472
2473         dst->bssht.bdSupportHT = src->bssht.bdSupportHT;
2474         dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation;
2475         dst->bssht.bdHTCapLen= src->bssht.bdHTCapLen;
2476         memcpy(dst->bssht.bdHTCapBuf,src->bssht.bdHTCapBuf,src->bssht.bdHTCapLen);
2477         dst->bssht.bdHTInfoLen= src->bssht.bdHTInfoLen;
2478         memcpy(dst->bssht.bdHTInfoBuf,src->bssht.bdHTInfoBuf,src->bssht.bdHTInfoLen);
2479         dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer;
2480         dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime;
2481         dst->broadcom_cap_exist = src->broadcom_cap_exist;
2482         dst->ralink_cap_exist = src->ralink_cap_exist;
2483         dst->atheros_cap_exist = src->atheros_cap_exist;
2484         dst->realtek_cap_exit = src->realtek_cap_exit;
2485         dst->marvell_cap_exist = src->marvell_cap_exist;
2486         dst->cisco_cap_exist = src->cisco_cap_exist;
2487         dst->airgo_cap_exist = src->airgo_cap_exist;
2488         dst->unknown_cap_exist = src->unknown_cap_exist;
2489         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
2490         dst->wpa_ie_len = src->wpa_ie_len;
2491         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
2492         dst->rsn_ie_len = src->rsn_ie_len;
2493         memcpy(dst->wzc_ie, src->wzc_ie, src->wzc_ie_len);
2494         dst->wzc_ie_len = src->wzc_ie_len;
2495
2496         dst->last_scanned = jiffies;
2497         /* qos related parameters */
2498         qos_active = dst->qos_data.active;
2499         old_param = dst->qos_data.param_count;
2500         dst->qos_data.supported = src->qos_data.supported;
2501         if (dst->flags & NETWORK_HAS_QOS_PARAMETERS)
2502                 memcpy(&dst->qos_data, &src->qos_data, sizeof(struct rtllib_qos_data));
2503         if (dst->qos_data.supported == 1) {
2504                 if (dst->ssid_len)
2505                         RTLLIB_DEBUG_QOS
2506                                 ("QoS the network %s is QoS supported\n",
2507                                 dst->ssid);
2508                 else
2509                         RTLLIB_DEBUG_QOS
2510                                 ("QoS the network is QoS supported\n");
2511         }
2512         dst->qos_data.active = qos_active;
2513         dst->qos_data.old_param_count = old_param;
2514
2515         /* dst->last_associate is not overwritten */
2516         dst->wmm_info = src->wmm_info;
2517         if (src->wmm_param[0].ac_aci_acm_aifsn|| \
2518            src->wmm_param[1].ac_aci_acm_aifsn|| \
2519            src->wmm_param[2].ac_aci_acm_aifsn|| \
2520            src->wmm_param[1].ac_aci_acm_aifsn) {
2521           memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
2522         }
2523
2524         dst->SignalStrength = src->SignalStrength;
2525         dst->RSSI = src->RSSI;
2526         dst->Turbo_Enable = src->Turbo_Enable;
2527
2528         dst->CountryIeLen = src->CountryIeLen;
2529         memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
2530
2531         dst->bWithAironetIE = src->bWithAironetIE;
2532         dst->bCkipSupported = src->bCkipSupported;
2533         memcpy(dst->CcxRmState,src->CcxRmState,2);
2534         dst->bCcxRmEnable = src->bCcxRmEnable;
2535         dst->MBssidMask = src->MBssidMask;
2536         dst->bMBssidValid = src->bMBssidValid;
2537         memcpy(dst->MBssid,src->MBssid,6);
2538         dst->bWithCcxVerNum = src->bWithCcxVerNum;
2539         dst->BssCcxVerNumber = src->BssCcxVerNumber;
2540
2541 }
2542 static inline int is_beacon(__le16 fc)
2543 {
2544         return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == RTLLIB_STYPE_BEACON);
2545 }
2546
2547 static int IsPassiveChannel( struct rtllib_device *rtllib, u8 channel)
2548 {
2549         if (MAX_CHANNEL_NUMBER < channel) {
2550                 printk("%s(): Invalid Channel\n", __func__);
2551                 return 0;
2552         }
2553
2554         if (rtllib->active_channel_map[channel] == 2)
2555                 return 1;
2556
2557         return 0;
2558 }
2559
2560 int IsLegalChannel( struct rtllib_device *rtllib, u8 channel)
2561 {
2562         if (MAX_CHANNEL_NUMBER < channel) {
2563                 printk("%s(): Invalid Channel\n", __func__);
2564                 return 0;
2565         }
2566         if (rtllib->active_channel_map[channel] > 0)
2567                 return 1;
2568
2569         return 0;
2570 }
2571
2572
2573 static inline void rtllib_process_probe_response(
2574         struct rtllib_device *ieee,
2575         struct rtllib_probe_response *beacon,
2576         struct rtllib_rx_stats *stats)
2577 {
2578         struct rtllib_network *target;
2579         struct rtllib_network *oldest = NULL;
2580         struct rtllib_info_element *info_element = &beacon->info_element[0];
2581         unsigned long flags;
2582         short renew;
2583         struct rtllib_network *network = kzalloc(sizeof(struct rtllib_network), GFP_ATOMIC);
2584
2585         if (!network)
2586                 return;
2587
2588         RTLLIB_DEBUG_SCAN(
2589                 "'%s' (" MAC_FMT "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
2590                 escape_essid(info_element->data, info_element->len),
2591                 MAC_ARG(beacon->header.addr3),
2592                 (beacon->capability & (1<<0xf)) ? '1' : '0',
2593                 (beacon->capability & (1<<0xe)) ? '1' : '0',
2594                 (beacon->capability & (1<<0xd)) ? '1' : '0',
2595                 (beacon->capability & (1<<0xc)) ? '1' : '0',
2596                 (beacon->capability & (1<<0xb)) ? '1' : '0',
2597                 (beacon->capability & (1<<0xa)) ? '1' : '0',
2598                 (beacon->capability & (1<<0x9)) ? '1' : '0',
2599                 (beacon->capability & (1<<0x8)) ? '1' : '0',
2600                 (beacon->capability & (1<<0x7)) ? '1' : '0',
2601                 (beacon->capability & (1<<0x6)) ? '1' : '0',
2602                 (beacon->capability & (1<<0x5)) ? '1' : '0',
2603                 (beacon->capability & (1<<0x4)) ? '1' : '0',
2604                 (beacon->capability & (1<<0x3)) ? '1' : '0',
2605                 (beacon->capability & (1<<0x2)) ? '1' : '0',
2606                 (beacon->capability & (1<<0x1)) ? '1' : '0',
2607                 (beacon->capability & (1<<0x0)) ? '1' : '0');
2608
2609         if (rtllib_network_init(ieee, beacon, network, stats)) {
2610                 RTLLIB_DEBUG_SCAN("Dropped '%s' (" MAC_FMT ") via %s.\n",
2611                                      escape_essid(info_element->data,
2612                                                   info_element->len),
2613                                      MAC_ARG(beacon->header.addr3),
2614                                      WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2615                                      RTLLIB_STYPE_PROBE_RESP ?
2616                                      "PROBE RESPONSE" : "BEACON");
2617                 goto free_network;
2618         }
2619
2620
2621         if (!IsLegalChannel(ieee, network->channel))
2622                 goto free_network;
2623
2624         if (WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == RTLLIB_STYPE_PROBE_RESP) {
2625                 if (IsPassiveChannel(ieee, network->channel)) {
2626                         printk("GetScanInfo(): For Global Domain, "
2627                                "filter probe response at channel(%d).\n", network->channel);
2628                         goto free_network;
2629                 }
2630         }
2631
2632         /* The network parsed correctly -- so now we scan our known networks
2633          * to see if we can find it in our list.
2634          *
2635          * NOTE:  This search is definitely not optimized.  Once its doing
2636          *        the "right thing" we'll optimize it for efficiency if
2637          *        necessary */
2638
2639         /* Search for this entry in the list and update it if it is
2640          * already there. */
2641
2642         spin_lock_irqsave(&ieee->lock, flags);
2643         {
2644                 if (is_same_network(&ieee->current_network, network, (network->ssid_len?1:0))) {
2645                         update_network(&ieee->current_network, network);
2646                         if ((ieee->current_network.mode == IEEE_N_24G || ieee->current_network.mode == IEEE_G)
2647                         && ieee->current_network.berp_info_valid){
2648                         if (ieee->current_network.erp_value& ERP_UseProtection)
2649                                 ieee->current_network.buseprotection = true;
2650                 else
2651                         ieee->current_network.buseprotection = false;
2652                 }
2653                 if (is_beacon(beacon->header.frame_ctl))
2654                 {
2655                                 if (ieee->state >= RTLLIB_LINKED)
2656                                         ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
2657                         }
2658                 }
2659         }
2660         list_for_each_entry(target, &ieee->network_list, list) {
2661                 if (is_same_network(target, network,(target->ssid_len?1:0)))
2662                         break;
2663                 if ((oldest == NULL) ||
2664                     (target->last_scanned < oldest->last_scanned))
2665                         oldest = target;
2666         }
2667
2668         /* If we didn't find a match, then get a new network slot to initialize
2669          * with this beacon's information */
2670         if (&target->list == &ieee->network_list) {
2671                 if (list_empty(&ieee->network_free_list)) {
2672                         /* If there are no more slots, expire the oldest */
2673                         list_del(&oldest->list);
2674                         target = oldest;
2675                         RTLLIB_DEBUG_SCAN("Expired '%s' (" MAC_FMT ") from "
2676                                              "network list.\n",
2677                                              escape_essid(target->ssid,
2678                                                           target->ssid_len),
2679                                              MAC_ARG(target->bssid));
2680                 } else {
2681                         /* Otherwise just pull from the free list */
2682                         target = list_entry(ieee->network_free_list.next,
2683                                             struct rtllib_network, list);
2684                         list_del(ieee->network_free_list.next);
2685                 }
2686
2687
2688                 RTLLIB_DEBUG_SCAN("Adding '%s' (" MAC_FMT ") via %s.\n",
2689                                      escape_essid(network->ssid,
2690                                                   network->ssid_len),
2691                                      MAC_ARG(network->bssid),
2692                                      WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2693                                      RTLLIB_STYPE_PROBE_RESP ?
2694                                      "PROBE RESPONSE" : "BEACON");
2695                 memcpy(target, network, sizeof(*target));
2696                 list_add_tail(&target->list, &ieee->network_list);
2697                 if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
2698                         rtllib_softmac_new_net(ieee, network);
2699         } else {
2700                 RTLLIB_DEBUG_SCAN("Updating '%s' (" MAC_FMT ") via %s.\n",
2701                                      escape_essid(target->ssid,
2702                                                   target->ssid_len),
2703                                      MAC_ARG(target->bssid),
2704                                      WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2705                                      RTLLIB_STYPE_PROBE_RESP ?
2706                                      "PROBE RESPONSE" : "BEACON");
2707
2708                 /* we have an entry and we are going to update it. But this entry may
2709                  * be already expired. In this case we do the same as we found a new
2710                  * net and call the new_net handler
2711                  */
2712                 renew = !time_after(target->last_scanned + ieee->scan_age, jiffies);
2713                 if ((!target->ssid_len) &&
2714                         (((network->ssid_len > 0) && (target->hidden_ssid_len == 0))
2715                         || ((ieee->current_network.ssid_len == network->ssid_len) &&
2716                            (strncmp(ieee->current_network.ssid, network->ssid, network->ssid_len) == 0) &&
2717                            (ieee->state == RTLLIB_NOLINK)))
2718                         ) {
2719                         renew = 1;
2720                 }
2721                 update_network(target, network);
2722                 if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
2723                         rtllib_softmac_new_net(ieee, network);
2724         }
2725
2726         spin_unlock_irqrestore(&ieee->lock, flags);
2727         if (is_beacon(beacon->header.frame_ctl)&&is_same_network(&ieee->current_network, network, (network->ssid_len?1:0))&&\
2728                 (ieee->state == RTLLIB_LINKED)) {
2729                 if (ieee->handle_beacon != NULL) {
2730                         ieee->handle_beacon(ieee->dev,beacon,&ieee->current_network);
2731                 }
2732         }
2733 free_network:
2734         kfree(network);
2735         return;
2736 }
2737
2738 void rtllib_rx_mgt(struct rtllib_device *ieee,
2739                       struct sk_buff *skb,
2740                       struct rtllib_rx_stats *stats)
2741 {
2742     struct rtllib_hdr_4addr *header = (struct rtllib_hdr_4addr *)skb->data ;
2743     if (WLAN_FC_GET_STYPE(header->frame_ctl) != RTLLIB_STYPE_PROBE_RESP &&
2744             WLAN_FC_GET_STYPE(header->frame_ctl) != RTLLIB_STYPE_BEACON)
2745         ieee->last_rx_ps_time = jiffies;
2746
2747     switch (WLAN_FC_GET_STYPE(header->frame_ctl)) {
2748
2749         case RTLLIB_STYPE_BEACON:
2750             RTLLIB_DEBUG_MGMT("received BEACON (%d)\n",
2751                     WLAN_FC_GET_STYPE(header->frame_ctl));
2752             RTLLIB_DEBUG_SCAN("Beacon\n");
2753             rtllib_process_probe_response(
2754                     ieee, (struct rtllib_probe_response *)header, stats);
2755
2756             if (ieee->sta_sleep || (ieee->ps != RTLLIB_PS_DISABLED &&
2757                         ieee->iw_mode == IW_MODE_INFRA &&
2758                         ieee->state == RTLLIB_LINKED))
2759                 tasklet_schedule(&ieee->ps_task);
2760
2761             break;
2762
2763         case RTLLIB_STYPE_PROBE_RESP:
2764             RTLLIB_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
2765                     WLAN_FC_GET_STYPE(header->frame_ctl));
2766             RTLLIB_DEBUG_SCAN("Probe response\n");
2767             rtllib_process_probe_response(
2768                     ieee, (struct rtllib_probe_response *)header, stats);
2769             break;
2770         case RTLLIB_STYPE_PROBE_REQ:
2771             RTLLIB_DEBUG_MGMT("received PROBE RESQUEST (%d)\n",
2772                     WLAN_FC_GET_STYPE(header->frame_ctl));
2773             RTLLIB_DEBUG_SCAN("Probe request\n");
2774             if ((ieee->softmac_features & IEEE_SOFTMAC_PROBERS) &&
2775                     ((ieee->iw_mode == IW_MODE_ADHOC ||
2776                       ieee->iw_mode == IW_MODE_MASTER) &&
2777                      ieee->state == RTLLIB_LINKED)){
2778                 rtllib_rx_probe_rq(ieee, skb);
2779             }
2780             break;
2781     }
2782
2783 }