SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/staging/rtl8187se/ieee80211/ieee80211_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/config.h>
  26 #include <linux/errno.h>
  27 #include <linux/if_arp.h>
  28 #include <linux/in6.h>
  29 #include <linux/in.h>
  30 #include <linux/ip.h>
  31 #include <linux/kernel.h>
  32 #include <linux/module.h>
  33 #include <linux/netdevice.h>
  34 #include <linux/pci.h>
  35 #include <linux/proc_fs.h>
  36 #include <linux/skbuff.h>
  37 #include <linux/slab.h>
  38 #include <linux/tcp.h>
  39 #include <linux/types.h>
  40 #include <linux/wireless.h>
  41 #include <linux/etherdevice.h>
  42 #include <asm/uaccess.h>
  43 #include <linux/ctype.h>
  44
  45 #include "ieee80211.h"
  46 #include "dot11d.h"
  47 static inline void ieee80211_monitor_rx(struct ieee80211_device *ieee,
  48                                         struct sk_buff *skb,
  49                                         struct ieee80211_rx_stats *rx_stats)
  50 {
  51         struct ieee80211_hdr_4addr *hdr =
  52                 (struct ieee80211_hdr_4addr *)skb->data;
  53         u16 fc = le16_to_cpu(hdr->frame_ctl);
  54
  55         skb->dev = ieee->dev;
  56         skb_reset_mac_header(skb);
  57         skb_pull(skb, ieee80211_get_hdrlen(fc));
  58         skb->pkt_type = PACKET_OTHERHOST;
  59         skb->protocol = __constant_htons(ETH_P_80211_RAW);
  60         memset(skb->cb, 0, sizeof(skb->cb));
  61         netif_rx(skb);
  62 }
  63
  64
  65 /* Called only as a tasklet (software IRQ) */
  66 static struct ieee80211_frag_entry *
  67 ieee80211_frag_cache_find(struct ieee80211_device *ieee, unsigned int seq,
  68                           unsigned int frag, u8 tid,u8 *src, u8 *dst)
  69 {
  70         struct ieee80211_frag_entry *entry;
  71         int i;
  72
  73         for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) {
  74                 entry = &ieee->frag_cache[tid][i];
  75                 if (entry->skb != NULL &&
  76                     time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
  77                         IEEE80211_DEBUG_FRAG(
  78                                 "expiring fragment cache entry "
  79                                 "seq=%u last_frag=%u\n",
  80                                 entry->seq, entry->last_frag);
  81                         dev_kfree_skb_any(entry->skb);
  82                         entry->skb = NULL;
  83                 }
  84
  85                 if (entry->skb != NULL && entry->seq == seq &&
  86                     (entry->last_frag + 1 == frag || frag == -1) &&
  87                     memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
  88                     memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
  89                         return entry;
  90         }
  91
  92         return NULL;
  93 }
  94
  95 /* Called only as a tasklet (software IRQ) */
  96 static struct sk_buff *
  97 ieee80211_frag_cache_get(struct ieee80211_device *ieee,
  98                          struct ieee80211_hdr_4addr *hdr)
  99 {
 100         struct sk_buff *skb = NULL;
 101         u16 fc = le16_to_cpu(hdr->frame_ctl);
 102         u16 sc = le16_to_cpu(hdr->seq_ctl);
 103         unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
 104         unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
 105         struct ieee80211_frag_entry *entry;
 106         struct ieee80211_hdr_3addrqos *hdr_3addrqos;
 107         struct ieee80211_hdr_4addrqos *hdr_4addrqos;
 108         u8 tid;
 109
 110         if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
 111           hdr_4addrqos = (struct ieee80211_hdr_4addrqos *)hdr;
 112           tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QOS_TID;
 113           tid = UP2AC(tid);
 114           tid ++;
 115         } else if (IEEE80211_QOS_HAS_SEQ(fc)) {
 116           hdr_3addrqos = (struct ieee80211_hdr_3addrqos *)hdr;
 117           tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QOS_TID;
 118           tid = UP2AC(tid);
 119           tid ++;
 120         } else {
 121           tid = 0;
 122         }
 123
 124         if (frag == 0) {
 125                 /* Reserve enough space to fit maximum frame length */
 126                 skb = dev_alloc_skb(ieee->dev->mtu +
 127                                     sizeof(struct ieee80211_hdr_4addr) +
 128                                     8 /* LLC */ +
 129                                     2 /* alignment */ +
 130                                     8 /* WEP */ +
 131                                     ETH_ALEN /* WDS */ +
 132                                     (IEEE80211_QOS_HAS_SEQ(fc)?2:0) /* QOS Control */);
 133                 if (skb == NULL)
 134                         return NULL;
 135
 136                 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
 137                 ieee->frag_next_idx[tid]++;
 138                 if (ieee->frag_next_idx[tid] >= IEEE80211_FRAG_CACHE_LEN)
 139                         ieee->frag_next_idx[tid] = 0;
 140
 141                 if (entry->skb != NULL)
 142                         dev_kfree_skb_any(entry->skb);
 143
 144                 entry->first_frag_time = jiffies;
 145                 entry->seq = seq;
 146                 entry->last_frag = frag;
 147                 entry->skb = skb;
 148                 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
 149                 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
 150         } else {
 151                 /* received a fragment of a frame for which the head fragment
 152                  * should have already been received */
 153                 entry = ieee80211_frag_cache_find(ieee, seq, frag, tid,hdr->addr2,
 154                                                   hdr->addr1);
 155                 if (entry != NULL) {
 156                         entry->last_frag = frag;
 157                         skb = entry->skb;
 158                 }
 159         }
 160
 161         return skb;
 162 }
 163
 164
 165 /* Called only as a tasklet (software IRQ) */
 166 static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee,
 167                                            struct ieee80211_hdr_4addr *hdr)
 168 {
 169         u16 fc = le16_to_cpu(hdr->frame_ctl);
 170         u16 sc = le16_to_cpu(hdr->seq_ctl);
 171         unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
 172         struct ieee80211_frag_entry *entry;
 173         struct ieee80211_hdr_3addrqos *hdr_3addrqos;
 174         struct ieee80211_hdr_4addrqos *hdr_4addrqos;
 175         u8 tid;
 176
 177         if(((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
 178           hdr_4addrqos = (struct ieee80211_hdr_4addrqos *)hdr;
 179           tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QOS_TID;
 180           tid = UP2AC(tid);
 181           tid ++;
 182         } else if (IEEE80211_QOS_HAS_SEQ(fc)) {
 183           hdr_3addrqos = (struct ieee80211_hdr_3addrqos *)hdr;
 184           tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QOS_TID;
 185           tid = UP2AC(tid);
 186           tid ++;
 187         } else {
 188           tid = 0;
 189         }
 190
 191         entry = ieee80211_frag_cache_find(ieee, seq, -1, tid,hdr->addr2,
 192                                           hdr->addr1);
 193
 194         if (entry == NULL) {
 195                 IEEE80211_DEBUG_FRAG(
 196                         "could not invalidate fragment cache "
 197                         "entry (seq=%u)\n", seq);
 198                 return -1;
 199         }
 200
 201         entry->skb = NULL;
 202         return 0;
 203 }
 204
 205
 206
 207 /* ieee80211_rx_frame_mgtmt
 208  *
 209  * Responsible for handling management control frames
 210  *
 211  * Called by ieee80211_rx */
 212 static inline int
 213 ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb,
 214                         struct ieee80211_rx_stats *rx_stats, u16 type,
 215                         u16 stype)
 216 {
 217         struct ieee80211_hdr_4addr *hdr;
 218
 219         // cheat the the hdr type
 220         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 221
 222         /* On the struct stats definition there is written that
 223          * this is not mandatory.... but seems that the probe
 224          * response parser uses it
 225          */
 226         rx_stats->len = skb->len;
 227         ieee80211_rx_mgt(ieee, (struct ieee80211_hdr_4addr *)skb->data,
 228                          rx_stats);
 229
 230         if((ieee->state == IEEE80211_LINKED)&&(memcmp(hdr->addr3,ieee->current_network.bssid,ETH_ALEN))) {
 231                 dev_kfree_skb_any(skb);
 232                 return 0;
 233         }
 234
 235         ieee80211_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
 236
 237         dev_kfree_skb_any(skb);
 238
 239         return 0;
 240
 241 }
 242
 243
 244
 245 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
 246 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
 247 static unsigned char rfc1042_header[] =
 248 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
 249 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
 250 static unsigned char bridge_tunnel_header[] =
 251 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
 252 /* No encapsulation header if EtherType < 0x600 (=length) */
 253
 254 /* Called by ieee80211_rx_frame_decrypt */
 255 static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee,
 256                                     struct sk_buff *skb, size_t hdrlen)
 257 {
 258         struct net_device *dev = ieee->dev;
 259         u16 fc, ethertype;
 260         struct ieee80211_hdr_4addr *hdr;
 261         u8 *pos;
 262
 263         if (skb->len < 24)
 264                 return 0;
 265
 266         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 267         fc = le16_to_cpu(hdr->frame_ctl);
 268
 269         /* check that the frame is unicast frame to us */
 270         if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 271             IEEE80211_FCTL_TODS &&
 272             memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
 273             memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
 274                 /* ToDS frame with own addr BSSID and DA */
 275         } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 276                    IEEE80211_FCTL_FROMDS &&
 277                    memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
 278                 /* FromDS frame with own addr as DA */
 279         } else
 280                 return 0;
 281
 282         if (skb->len < 24 + 8)
 283                 return 0;
 284
 285         /* check for port access entity Ethernet type */
 286 //      pos = skb->data + 24;
 287         pos = skb->data + hdrlen;
 288         ethertype = (pos[6] << 8) | pos[7];
 289         if (ethertype == ETH_P_PAE)
 290                 return 1;
 291
 292         return 0;
 293 }
 294
 295 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
 296 static inline int
 297 ieee80211_rx_frame_decrypt(struct ieee80211_device* ieee, struct sk_buff *skb,
 298                            struct ieee80211_crypt_data *crypt)
 299 {
 300         struct ieee80211_hdr_4addr *hdr;
 301         int res, hdrlen;
 302
 303         if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
 304                 return 0;
 305
 306         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 307         hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 308
 309 #ifdef CONFIG_IEEE80211_CRYPT_TKIP
 310         if (ieee->tkip_countermeasures &&
 311             strcmp(crypt->ops->name, "TKIP") == 0) {
 312                 if (net_ratelimit()) {
 313                         printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
 314                                "received packet from " MAC_FMT "\n",
 315                                ieee->dev->name, MAC_ARG(hdr->addr2));
 316                 }
 317                 return -1;
 318         }
 319 #endif
 320
 321         atomic_inc(&crypt->refcnt);
 322         res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
 323         atomic_dec(&crypt->refcnt);
 324         if (res < 0) {
 325                 IEEE80211_DEBUG_DROP(
 326                         "decryption failed (SA=" MAC_FMT
 327                         ") res=%d\n", MAC_ARG(hdr->addr2), res);
 328                 if (res == -2)
 329                         IEEE80211_DEBUG_DROP("Decryption failed ICV "
 330                                              "mismatch (key %d)\n",
 331                                              skb->data[hdrlen + 3] >> 6);
 332                 ieee->ieee_stats.rx_discards_undecryptable++;
 333                 return -1;
 334         }
 335
 336         return res;
 337 }
 338
 339
 340 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
 341 static inline int
 342 ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device* ieee, struct sk_buff *skb,
 343                              int keyidx, struct ieee80211_crypt_data *crypt)
 344 {
 345         struct ieee80211_hdr_4addr *hdr;
 346         int res, hdrlen;
 347
 348         if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
 349                 return 0;
 350
 351         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 352         hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 353
 354         atomic_inc(&crypt->refcnt);
 355         res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
 356         atomic_dec(&crypt->refcnt);
 357         if (res < 0) {
 358                 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
 359                        " (SA=" MAC_FMT " keyidx=%d)\n",
 360                        ieee->dev->name, MAC_ARG(hdr->addr2), keyidx);
 361                 return -1;
 362         }
 363
 364         return 0;
 365 }
 366
 367
 368 /* this function is stolen from ipw2200 driver*/
 369 #define IEEE_PACKET_RETRY_TIME (5*HZ)
 370 static int is_duplicate_packet(struct ieee80211_device *ieee,
 371                                       struct ieee80211_hdr_4addr *header)
 372 {
 373         u16 fc = le16_to_cpu(header->frame_ctl);
 374         u16 sc = le16_to_cpu(header->seq_ctl);
 375         u16 seq = WLAN_GET_SEQ_SEQ(sc);
 376         u16 frag = WLAN_GET_SEQ_FRAG(sc);
 377         u16 *last_seq, *last_frag;
 378         unsigned long *last_time;
 379         struct ieee80211_hdr_3addrqos *hdr_3addrqos;
 380         struct ieee80211_hdr_4addrqos *hdr_4addrqos;
 381         u8 tid;
 382
 383         //TO2DS and QoS
 384         if(((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
 385           hdr_4addrqos = (struct ieee80211_hdr_4addrqos *)header;
 386           tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QOS_TID;
 387           tid = UP2AC(tid);
 388           tid ++;
 389         } else if(IEEE80211_QOS_HAS_SEQ(fc)) { //QoS
 390           hdr_3addrqos = (struct ieee80211_hdr_3addrqos *)header;
 391           tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QOS_TID;
 392           tid = UP2AC(tid);
 393           tid ++;
 394         } else { // no QoS
 395           tid = 0;
 396         }
 397         switch (ieee->iw_mode) {
 398         case IW_MODE_ADHOC:
 399         {
 400                 struct list_head *p;
 401                 struct ieee_ibss_seq *entry = NULL;
 402                 u8 *mac = header->addr2;
 403                 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
 404                 //for (pos = (head)->next; pos != (head); pos = pos->next)
 405                 __list_for_each(p, &ieee->ibss_mac_hash[index]) {
 406                         entry = list_entry(p, struct ieee_ibss_seq, list);
 407                         if (!memcmp(entry->mac, mac, ETH_ALEN))
 408                                 break;
 409                 }
 410         //      if (memcmp(entry->mac, mac, ETH_ALEN)){
 411                 if (p == &ieee->ibss_mac_hash[index]) {
 412                         entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC);
 413                         if (!entry) {
 414                                 printk(KERN_WARNING "Cannot malloc new mac entry\n");
 415                                 return 0;
 416                         }
 417                         memcpy(entry->mac, mac, ETH_ALEN);
 418                         entry->seq_num[tid] = seq;
 419                         entry->frag_num[tid] = frag;
 420                         entry->packet_time[tid] = jiffies;
 421                         list_add(&entry->list, &ieee->ibss_mac_hash[index]);
 422                         return 0;
 423                 }
 424                 last_seq = &entry->seq_num[tid];
 425                 last_frag = &entry->frag_num[tid];
 426                 last_time = &entry->packet_time[tid];
 427                 break;
 428         }
 429
 430         case IW_MODE_INFRA:
 431                 last_seq = &ieee->last_rxseq_num[tid];
 432                 last_frag = &ieee->last_rxfrag_num[tid];
 433                 last_time = &ieee->last_packet_time[tid];
 434
 435                 break;
 436         default:
 437                 return 0;
 438         }
 439
 440 //      if(tid != 0) {
 441 //              printk(KERN_WARNING ":)))))))))))%x %x %x, fc(%x)\n", tid, *last_seq, seq, header->frame_ctl);
 442 //      }
 443         if ((*last_seq == seq) &&
 444             time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
 445                 if (*last_frag == frag){
 446                         //printk(KERN_WARNING "[1] go drop!\n");
 447                         goto drop;
 448
 449                 }
 450                 if (*last_frag + 1 != frag)
 451                         /* out-of-order fragment */
 452                         //printk(KERN_WARNING "[2] go drop!\n");
 453                         goto drop;
 454         } else
 455                 *last_seq = seq;
 456
 457         *last_frag = frag;
 458         *last_time = jiffies;
 459         return 0;
 460
 461 drop:
 462 //      BUG_ON(!(fc & IEEE80211_FCTL_RETRY));
 463 //      printk("DUP\n");
 464
 465         return 1;
 466 }
 467
 468
 469 /* All received frames are sent to this function. @skb contains the frame in
 470  * IEEE 802.11 format, i.e., in the format it was sent over air.
 471  * This function is called only as a tasklet (software IRQ). */
 472 int ieee80211_rtl_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
 473                  struct ieee80211_rx_stats *rx_stats)
 474 {
 475         struct net_device *dev = ieee->dev;
 476         //struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
 477         struct ieee80211_hdr_4addr *hdr;
 478
 479         size_t hdrlen;
 480         u16 fc, type, stype, sc;
 481         struct net_device_stats *stats;
 482         unsigned int frag;
 483         u8 *payload;
 484         u16 ethertype;
 485         u8 dst[ETH_ALEN];
 486         u8 src[ETH_ALEN];
 487         u8 bssid[ETH_ALEN];
 488         struct ieee80211_crypt_data *crypt = NULL;
 489         int keyidx = 0;
 490
 491         // cheat the the hdr type
 492         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 493         stats = &ieee->stats;
 494
 495         if (skb->len < 10) {
 496                 printk(KERN_INFO "%s: SKB length < 10\n",
 497                        dev->name);
 498                 goto rx_dropped;
 499         }
 500
 501         fc = le16_to_cpu(hdr->frame_ctl);
 502         type = WLAN_FC_GET_TYPE(fc);
 503         stype = WLAN_FC_GET_STYPE(fc);
 504         sc = le16_to_cpu(hdr->seq_ctl);
 505
 506         frag = WLAN_GET_SEQ_FRAG(sc);
 507
 508 //YJ,add,080828,for keep alive
 509         if((fc & IEEE80211_FCTL_TODS) != IEEE80211_FCTL_TODS)
 510         {
 511                 if(!memcmp(hdr->addr1,dev->dev_addr, ETH_ALEN))
 512                 {
 513                         ieee->NumRxUnicast++;
 514                 }
 515         }
 516         else
 517         {
 518                 if(!memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN))
 519                 {
 520                         ieee->NumRxUnicast++;
 521                 }
 522         }
 523 //YJ,add,080828,for keep alive,end
 524
 525         hdrlen = ieee80211_get_hdrlen(fc);
 526
 527
 528         if (ieee->iw_mode == IW_MODE_MONITOR) {
 529                 ieee80211_monitor_rx(ieee, skb, rx_stats);
 530                 stats->rx_packets++;
 531                 stats->rx_bytes += skb->len;
 532                 return 1;
 533         }
 534
 535         if (ieee->host_decrypt) {
 536                 int idx = 0;
 537                 if (skb->len >= hdrlen + 3)
 538                         idx = skb->data[hdrlen + 3] >> 6;
 539                 crypt = ieee->crypt[idx];
 540
 541                 /* allow NULL decrypt to indicate an station specific override
 542                  * for default encryption */
 543                 if (crypt && (crypt->ops == NULL ||
 544                               crypt->ops->decrypt_mpdu == NULL))
 545                         crypt = NULL;
 546
 547                 if (!crypt && (fc & IEEE80211_FCTL_WEP)) {
 548                         /* This seems to be triggered by some (multicast?)
 549                          * frames from other than current BSS, so just drop the
 550                          * frames silently instead of filling system log with
 551                          * these reports. */
 552                         IEEE80211_DEBUG_DROP("Decryption failed (not set)"
 553                                              " (SA=" MAC_FMT ")\n",
 554                                              MAC_ARG(hdr->addr2));
 555                         ieee->ieee_stats.rx_discards_undecryptable++;
 556                         goto rx_dropped;
 557                 }
 558         }
 559
 560         if (skb->len < IEEE80211_DATA_HDR3_LEN)
 561                 goto rx_dropped;
 562
 563         // if QoS enabled, should check the sequence for each of the AC
 564         if (is_duplicate_packet(ieee, hdr))
 565                 goto rx_dropped;
 566
 567
 568         if (type == IEEE80211_FTYPE_MGMT) {
 569                 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
 570                         goto rx_dropped;
 571                 else
 572                         goto rx_exit;
 573         }
 574
 575         /* Data frame - extract src/dst addresses */
 576         switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
 577         case IEEE80211_FCTL_FROMDS:
 578                 memcpy(dst, hdr->addr1, ETH_ALEN);
 579                 memcpy(src, hdr->addr3, ETH_ALEN);
 580                 memcpy(bssid,hdr->addr2,ETH_ALEN);
 581                 break;
 582         case IEEE80211_FCTL_TODS:
 583                 memcpy(dst, hdr->addr3, ETH_ALEN);
 584                 memcpy(src, hdr->addr2, ETH_ALEN);
 585                 memcpy(bssid,hdr->addr1,ETH_ALEN);
 586                 break;
 587         case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
 588                 if (skb->len < IEEE80211_DATA_HDR4_LEN)
 589                         goto rx_dropped;
 590                 memcpy(dst, hdr->addr3, ETH_ALEN);
 591                 memcpy(src, hdr->addr4, ETH_ALEN);
 592                 memcpy(bssid, ieee->current_network.bssid, ETH_ALEN);
 593                 break;
 594         case 0:
 595                 memcpy(dst, hdr->addr1, ETH_ALEN);
 596                 memcpy(src, hdr->addr2, ETH_ALEN);
 597                 memcpy(bssid,hdr->addr3,ETH_ALEN);
 598                 break;
 599         }
 600
 601
 602         dev->last_rx = jiffies;
 603
 604
 605         /* Nullfunc frames may have PS-bit set, so they must be passed to
 606          * hostap_handle_sta_rx() before being dropped here. */
 607         if (stype != IEEE80211_STYPE_DATA &&
 608             stype != IEEE80211_STYPE_DATA_CFACK &&
 609             stype != IEEE80211_STYPE_DATA_CFPOLL &&
 610             stype != IEEE80211_STYPE_DATA_CFACKPOLL&&
 611             stype != IEEE80211_STYPE_QOS_DATA//add by David,2006.8.4
 612             ) {
 613                 if (stype != IEEE80211_STYPE_NULLFUNC)
 614                         IEEE80211_DEBUG_DROP(
 615                                 "RX: dropped data frame "
 616                                 "with no data (type=0x%02x, "
 617                                 "subtype=0x%02x, len=%d)\n",
 618                                 type, stype, skb->len);
 619                 goto rx_dropped;
 620         }
 621         if(memcmp(bssid,ieee->current_network.bssid,ETH_ALEN)) {
 622                 goto rx_dropped;
 623         }
 624
 625         ieee->NumRxDataInPeriod++;
 626         ieee->NumRxOkTotal++;
 627         /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
 628
 629         if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
 630             (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
 631                 goto rx_dropped;
 632
 633         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 634
 635         /* skb: hdr + (possibly fragmented) plaintext payload */
 636         // PR: FIXME: hostap has additional conditions in the "if" below:
 637         // ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
 638         if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) {
 639                 int flen;
 640                 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
 641                 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
 642
 643                 if (!frag_skb) {
 644                         IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
 645                                         "Rx cannot get skb from fragment "
 646                                         "cache (morefrag=%d seq=%u frag=%u)\n",
 647                                         (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
 648                                         WLAN_GET_SEQ_SEQ(sc), frag);
 649                         goto rx_dropped;
 650                 }
 651                 flen = skb->len;
 652                 if (frag != 0)
 653                         flen -= hdrlen;
 654
 655                 if (frag_skb->tail + flen > frag_skb->end) {
 656                         printk(KERN_WARNING "%s: host decrypted and "
 657                                "reassembled frame did not fit skb\n",
 658                                dev->name);
 659                         ieee80211_frag_cache_invalidate(ieee, hdr);
 660                         goto rx_dropped;
 661                 }
 662
 663                 if (frag == 0) {
 664                         /* copy first fragment (including full headers) into
 665                          * beginning of the fragment cache skb */
 666                         memcpy(skb_put(frag_skb, flen), skb->data, flen);
 667                 } else {
 668                         /* append frame payload to the end of the fragment
 669                          * cache skb */
 670                         memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
 671                                flen);
 672                 }
 673                 dev_kfree_skb_any(skb);
 674                 skb = NULL;
 675
 676                 if (fc & IEEE80211_FCTL_MOREFRAGS) {
 677                         /* more fragments expected - leave the skb in fragment
 678                          * cache for now; it will be delivered to upper layers
 679                          * after all fragments have been received */
 680                         goto rx_exit;
 681                 }
 682
 683                 /* this was the last fragment and the frame will be
 684                  * delivered, so remove skb from fragment cache */
 685                 skb = frag_skb;
 686                 hdr = (struct ieee80211_hdr_4addr *)skb->data;
 687                 ieee80211_frag_cache_invalidate(ieee, hdr);
 688         }
 689
 690         /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
 691          * encrypted/authenticated */
 692         if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
 693             ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
 694                 goto rx_dropped;
 695
 696         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 697         if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep) {
 698                 if (/*ieee->ieee802_1x &&*/
 699                     ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
 700
 701 #ifdef CONFIG_IEEE80211_DEBUG
 702                         /* pass unencrypted EAPOL frames even if encryption is
 703                          * configured */
 704                         struct eapol *eap = (struct eapol *)(skb->data +
 705                                 24);
 706                         IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
 707                                                 eap_get_type(eap->type));
 708 #endif
 709                 } else {
 710                         IEEE80211_DEBUG_DROP(
 711                                 "encryption configured, but RX "
 712                                 "frame not encrypted (SA=" MAC_FMT ")\n",
 713                                 MAC_ARG(hdr->addr2));
 714                         goto rx_dropped;
 715                 }
 716         }
 717
 718 #ifdef CONFIG_IEEE80211_DEBUG
 719         if (crypt && !(fc & IEEE80211_FCTL_WEP) &&
 720             ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
 721                         struct eapol *eap = (struct eapol *)(skb->data +
 722                                 24);
 723                         IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
 724                                                 eap_get_type(eap->type));
 725         }
 726 #endif
 727
 728         if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep &&
 729             !ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
 730                 IEEE80211_DEBUG_DROP(
 731                         "dropped unencrypted RX data "
 732                         "frame from " MAC_FMT
 733                         " (drop_unencrypted=1)\n",
 734                         MAC_ARG(hdr->addr2));
 735                 goto rx_dropped;
 736         }
 737 /*
 738         if(ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
 739                 printk(KERN_WARNING "RX: IEEE802.1X EPAOL frame!\n");
 740         }
 741 */
 742         /* skb: hdr + (possible reassembled) full plaintext payload */
 743         payload = skb->data + hdrlen;
 744         ethertype = (payload[6] << 8) | payload[7];
 745
 746
 747         /* convert hdr + possible LLC headers into Ethernet header */
 748         if (skb->len - hdrlen >= 8 &&
 749             ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 &&
 750               ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
 751              memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) {
 752                 /* remove RFC1042 or Bridge-Tunnel encapsulation and
 753                  * replace EtherType */
 754                 skb_pull(skb, hdrlen + SNAP_SIZE);
 755                 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 756                 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 757         } else {
 758                 u16 len;
 759                 /* Leave Ethernet header part of hdr and full payload */
 760                 skb_pull(skb, hdrlen);
 761                 len = htons(skb->len);
 762                 memcpy(skb_push(skb, 2), &len, 2);
 763                 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 764                 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 765         }
 766
 767
 768         stats->rx_packets++;
 769         stats->rx_bytes += skb->len;
 770
 771         if (skb) {
 772                 skb->protocol = eth_type_trans(skb, dev);
 773                 memset(skb->cb, 0, sizeof(skb->cb));
 774                 skb->dev = dev;
 775                 skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
 776                 ieee->last_rx_ps_time = jiffies;
 777                 netif_rx(skb);
 778         }
 779
 780  rx_exit:
 781         return 1;
 782
 783  rx_dropped:
 784         stats->rx_dropped++;
 785
 786         /* Returning 0 indicates to caller that we have not handled the SKB--
 787          * so it is still allocated and can be used again by underlying
 788          * hardware as a DMA target */
 789         return 0;
 790 }
 791
 792 #define MGMT_FRAME_FIXED_PART_LENGTH            0x24
 793
 794 static inline int ieee80211_is_ofdm_rate(u8 rate)
 795 {
 796         switch (rate & ~IEEE80211_BASIC_RATE_MASK) {
 797         case IEEE80211_OFDM_RATE_6MB:
 798         case IEEE80211_OFDM_RATE_9MB:
 799         case IEEE80211_OFDM_RATE_12MB:
 800         case IEEE80211_OFDM_RATE_18MB:
 801         case IEEE80211_OFDM_RATE_24MB:
 802         case IEEE80211_OFDM_RATE_36MB:
 803         case IEEE80211_OFDM_RATE_48MB:
 804         case IEEE80211_OFDM_RATE_54MB:
 805                 return 1;
 806         }
 807         return 0;
 808 }
 809
 810 static inline int ieee80211_SignalStrengthTranslate(
 811         int  CurrSS
 812         )
 813 {
 814         int RetSS;
 815
 816         // Step 1. Scale mapping.
 817         if(CurrSS >= 71 && CurrSS <= 100)
 818         {
 819                 RetSS = 90 + ((CurrSS - 70) / 3);
 820         }
 821         else if(CurrSS >= 41 && CurrSS <= 70)
 822         {
 823                 RetSS = 78 + ((CurrSS - 40) / 3);
 824         }
 825         else if(CurrSS >= 31 && CurrSS <= 40)
 826         {
 827                 RetSS = 66 + (CurrSS - 30);
 828         }
 829         else if(CurrSS >= 21 && CurrSS <= 30)
 830         {
 831                 RetSS = 54 + (CurrSS - 20);
 832         }
 833         else if(CurrSS >= 5 && CurrSS <= 20)
 834         {
 835                 RetSS = 42 + (((CurrSS - 5) * 2) / 3);
 836         }
 837         else if(CurrSS == 4)
 838         {
 839                 RetSS = 36;
 840         }
 841         else if(CurrSS == 3)
 842         {
 843                 RetSS = 27;
 844         }
 845         else if(CurrSS == 2)
 846         {
 847                 RetSS = 18;
 848         }
 849         else if(CurrSS == 1)
 850         {
 851                 RetSS = 9;
 852         }
 853         else
 854         {
 855                 RetSS = CurrSS;
 856         }
 857         //RT_TRACE(COMP_DBG, DBG_LOUD, ("##### After Mapping:  LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
 858
 859         // Step 2. Smoothing.
 860
 861         //RT_TRACE(COMP_DBG, DBG_LOUD, ("$$$$$ After Smoothing:  LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
 862
 863         return RetSS;
 864 }
 865
 866 static inline void ieee80211_extract_country_ie(
 867         struct ieee80211_device *ieee,
 868         struct ieee80211_info_element *info_element,
 869         struct ieee80211_network *network,
 870         u8 * addr2
 871 )
 872 {
 873         if(IS_DOT11D_ENABLE(ieee))
 874         {
 875                 if(info_element->len!= 0)
 876                 {
 877                         memcpy(network->CountryIeBuf, info_element->data, info_element->len);
 878                         network->CountryIeLen = info_element->len;
 879
 880                         if(!IS_COUNTRY_IE_VALID(ieee))
 881                         {
 882                                 Dot11d_UpdateCountryIe(ieee, addr2, info_element->len, info_element->data);
 883                         }
 884                 }
 885
 886                 //
 887                 // 070305, rcnjko: I update country IE watch dog here because
 888                 // some AP (e.g. Cisco 1242) don't include country IE in their
 889                 // probe response frame.
 890                 //
 891                 if(IS_EQUAL_CIE_SRC(ieee, addr2) )
 892                 {
 893                         UPDATE_CIE_WATCHDOG(ieee);
 894                 }
 895         }
 896
 897 }
 898
 899 int
 900 ieee80211_TranslateToDbm(
 901         unsigned char SignalStrengthIndex       // 0-100 index.
 902         )
 903 {
 904         unsigned char SignalPower; // in dBm.
 905
 906         // Translate to dBm (x=0.5y-95).
 907         SignalPower = (int)SignalStrengthIndex * 7 / 10;
 908         SignalPower -= 95;
 909
 910         return SignalPower;
 911 }
 912 inline int ieee80211_network_init(
 913         struct ieee80211_device *ieee,
 914         struct ieee80211_probe_response *beacon,
 915         struct ieee80211_network *network,
 916         struct ieee80211_rx_stats *stats)
 917 {
 918 #ifdef CONFIG_IEEE80211_DEBUG
 919         char rates_str[64];
 920         char *p;
 921 #endif
 922         struct ieee80211_info_element *info_element;
 923         u16 left;
 924         u8 i;
 925         short offset;
 926         u8 curRate = 0,hOpRate = 0,curRate_ex = 0;
 927
 928         /* Pull out fixed field data */
 929         memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
 930         network->capability = beacon->capability;
 931         network->last_scanned = jiffies;
 932         network->time_stamp[0] = beacon->time_stamp[0];
 933         network->time_stamp[1] = beacon->time_stamp[1];
 934         network->beacon_interval = beacon->beacon_interval;
 935         /* Where to pull this? beacon->listen_interval;*/
 936         network->listen_interval = 0x0A;
 937         network->rates_len = network->rates_ex_len = 0;
 938         network->last_associate = 0;
 939         network->ssid_len = 0;
 940         network->flags = 0;
 941         network->atim_window = 0;
 942         network->QoS_Enable = 0;
 943 //by amy 080312
 944         network->HighestOperaRate = 0;
 945 //by amy 080312
 946         network->Turbo_Enable = 0;
 947         network->CountryIeLen = 0;
 948         memset(network->CountryIeBuf, 0, MAX_IE_LEN);
 949
 950         if (stats->freq == IEEE80211_52GHZ_BAND) {
 951                 /* for A band (No DS info) */
 952                 network->channel = stats->received_channel;
 953         } else
 954                 network->flags |= NETWORK_HAS_CCK;
 955
 956         network->wpa_ie_len = 0;
 957         network->rsn_ie_len = 0;
 958
 959         info_element = &beacon->info_element;
 960         left = stats->len - ((void *)info_element - (void *)beacon);
 961         while (left >= sizeof(struct ieee80211_info_element_hdr)) {
 962                 if (sizeof(struct ieee80211_info_element_hdr) + info_element->len > left) {
 963                         IEEE80211_DEBUG_SCAN("SCAN: parse failed: info_element->len + 2 > left : info_element->len+2=%d left=%d.\n",
 964                                              info_element->len + sizeof(struct ieee80211_info_element),
 965                                              left);
 966                         return 1;
 967                 }
 968
 969                 switch (info_element->id) {
 970                 case MFIE_TYPE_SSID:
 971                         if (ieee80211_is_empty_essid(info_element->data,
 972                                                      info_element->len)) {
 973                                 network->flags |= NETWORK_EMPTY_ESSID;
 974                                 break;
 975                         }
 976
 977                         network->ssid_len = min(info_element->len,
 978                                                 (u8)IW_ESSID_MAX_SIZE);
 979                         memcpy(network->ssid, info_element->data, network->ssid_len);
 980                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
 981                                 memset(network->ssid + network->ssid_len, 0,
 982                                        IW_ESSID_MAX_SIZE - network->ssid_len);
 983
 984                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_SSID: '%s' len=%d.\n",
 985                                              network->ssid, network->ssid_len);
 986                         break;
 987
 988                 case MFIE_TYPE_RATES:
 989 #ifdef CONFIG_IEEE80211_DEBUG
 990                         p = rates_str;
 991 #endif
 992                         network->rates_len = min(info_element->len, MAX_RATES_LENGTH);
 993                         for (i = 0; i < network->rates_len; i++) {
 994                                 network->rates[i] = info_element->data[i];
 995                                 curRate = network->rates[i] & 0x7f;
 996                                 if( hOpRate < curRate )
 997                                         hOpRate = curRate;
 998 #ifdef CONFIG_IEEE80211_DEBUG
 999                                 p += snprintf(p, sizeof(rates_str) - (p - rates_str), "%02X ", network->rates[i]);
1000 #endif
1001                                 if (ieee80211_is_ofdm_rate(info_element->data[i])) {
1002                                         network->flags |= NETWORK_HAS_OFDM;
1003                                         if (info_element->data[i] &
1004                                             IEEE80211_BASIC_RATE_MASK)
1005                                                 network->flags &=
1006                                                         ~NETWORK_HAS_CCK;
1007                                 }
1008                         }
1009
1010                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_RATES: '%s' (%d)\n",
1011                                              rates_str, network->rates_len);
1012                         break;
1013
1014                 case MFIE_TYPE_RATES_EX:
1015 #ifdef CONFIG_IEEE80211_DEBUG
1016                         p = rates_str;
1017 #endif
1018                         network->rates_ex_len = min(info_element->len, MAX_RATES_EX_LENGTH);
1019                         for (i = 0; i < network->rates_ex_len; i++) {
1020                                 network->rates_ex[i] = info_element->data[i];
1021                                 curRate_ex = network->rates_ex[i] & 0x7f;
1022                                 if( hOpRate < curRate_ex )
1023                                         hOpRate = curRate_ex;
1024 #ifdef CONFIG_IEEE80211_DEBUG
1025                                 p += snprintf(p, sizeof(rates_str) - (p - rates_str), "%02X ", network->rates[i]);
1026 #endif
1027                                 if (ieee80211_is_ofdm_rate(info_element->data[i])) {
1028                                         network->flags |= NETWORK_HAS_OFDM;
1029                                         if (info_element->data[i] &
1030                                             IEEE80211_BASIC_RATE_MASK)
1031                                                 network->flags &=
1032                                                         ~NETWORK_HAS_CCK;
1033                                 }
1034                         }
1035
1036                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1037                                              rates_str, network->rates_ex_len);
1038                         break;
1039
1040                 case MFIE_TYPE_DS_SET:
1041                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_DS_SET: %d\n",
1042                                              info_element->data[0]);
1043                         if (stats->freq == IEEE80211_24GHZ_BAND)
1044                                 network->channel = info_element->data[0];
1045                         break;
1046
1047                 case MFIE_TYPE_FH_SET:
1048                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_FH_SET: ignored\n");
1049                         break;
1050
1051                 case MFIE_TYPE_CF_SET:
1052                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_CF_SET: ignored\n");
1053                         break;
1054
1055                 case MFIE_TYPE_TIM:
1056
1057                         if(info_element->len < 4)
1058                                 break;
1059
1060                         network->dtim_period = info_element->data[1];
1061
1062                         if(ieee->state != IEEE80211_LINKED)
1063                                 break;
1064
1065                         network->last_dtim_sta_time[0] = jiffies;
1066                         network->last_dtim_sta_time[1] = stats->mac_time[1];
1067
1068                         network->dtim_data = IEEE80211_DTIM_VALID;
1069
1070                         if(info_element->data[0] != 0)
1071                                 break;
1072
1073                         if(info_element->data[2] & 1)
1074                                 network->dtim_data |= IEEE80211_DTIM_MBCAST;
1075
1076                         offset = (info_element->data[2] >> 1)*2;
1077
1078                         //printk("offset1:%x aid:%x\n",offset, ieee->assoc_id);
1079
1080                         /* add and modified for ps 2008.1.22 */
1081                         if(ieee->assoc_id < 8*offset ||
1082                                 ieee->assoc_id > 8*(offset + info_element->len -3)) {
1083                                 break;
1084                         }
1085
1086                         offset = (ieee->assoc_id/8) - offset;// + ((aid % 8)? 0 : 1) ;
1087
1088                 //      printk("offset:%x data:%x, ucast:%d\n", offset,
1089                         //      info_element->data[3+offset] ,
1090                         //      info_element->data[3+offset] & (1<<(ieee->assoc_id%8)));
1091
1092                         if(info_element->data[3+offset] & (1<<(ieee->assoc_id%8))) {
1093                                 network->dtim_data |= IEEE80211_DTIM_UCAST;
1094                         }
1095                         break;
1096
1097                 case MFIE_TYPE_IBSS_SET:
1098                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_IBSS_SET: ignored\n");
1099                         break;
1100
1101                 case MFIE_TYPE_CHALLENGE:
1102                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_CHALLENGE: ignored\n");
1103                         break;
1104
1105                 case MFIE_TYPE_GENERIC:
1106                         //nic is 87B
1107                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_GENERIC: %d bytes\n",
1108                                              info_element->len);
1109                         if (info_element->len >= 4  &&
1110                             info_element->data[0] == 0x00 &&
1111                             info_element->data[1] == 0x50 &&
1112                             info_element->data[2] == 0xf2 &&
1113                             info_element->data[3] == 0x01) {
1114                                 network->wpa_ie_len = min(info_element->len + 2,
1115                                                          MAX_WPA_IE_LEN);
1116                                 memcpy(network->wpa_ie, info_element,
1117                                        network->wpa_ie_len);
1118                         }
1119
1120                         if (info_element->len == 7 &&
1121                             info_element->data[0] == 0x00 &&
1122                             info_element->data[1] == 0xe0 &&
1123                             info_element->data[2] == 0x4c &&
1124                             info_element->data[3] == 0x01 &&
1125                             info_element->data[4] == 0x02) {
1126                                 network->Turbo_Enable = 1;
1127                         }
1128                         if (1 == stats->nic_type) {//nic 87
1129                                 break;
1130                         }
1131
1132                         if (info_element->len >= 5  &&
1133                             info_element->data[0] == 0x00 &&
1134                             info_element->data[1] == 0x50 &&
1135                             info_element->data[2] == 0xf2 &&
1136                             info_element->data[3] == 0x02 &&
1137                             info_element->data[4] == 0x00) {
1138                                 //printk(KERN_WARNING "wmm info updated: %x\n", info_element->data[6]);
1139                                 //WMM Information Element
1140                                 network->wmm_info = info_element->data[6];
1141                                 network->QoS_Enable = 1;
1142                         }
1143
1144                         if (info_element->len >= 8  &&
1145                             info_element->data[0] == 0x00 &&
1146                             info_element->data[1] == 0x50 &&
1147                             info_element->data[2] == 0xf2 &&
1148                             info_element->data[3] == 0x02 &&
1149                             info_element->data[4] == 0x01) {
1150                                 // Not care about version at present.
1151                                 //WMM Information Element
1152                                 //printk(KERN_WARNING "wmm info&param updated: %x\n", info_element->data[6]);
1153                                 network->wmm_info = info_element->data[6];
1154                                 //WMM Parameter Element
1155                                 memcpy(network->wmm_param, (u8 *)(info_element->data + 8),(info_element->len - 8));
1156                                 network->QoS_Enable = 1;
1157                         }
1158                         break;
1159
1160                 case MFIE_TYPE_RSN:
1161                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_RSN: %d bytes\n",
1162                                              info_element->len);
1163                         network->rsn_ie_len = min(info_element->len + 2,
1164                                                  MAX_WPA_IE_LEN);
1165                         memcpy(network->rsn_ie, info_element,
1166                                network->rsn_ie_len);
1167                         break;
1168                 case MFIE_TYPE_COUNTRY:
1169                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
1170                                              info_element->len);
1171 //                      printk("=====>Receive <%s> Country IE\n",network->ssid);
1172                         ieee80211_extract_country_ie(ieee, info_element, network, beacon->header.addr2);
1173                         break;
1174                 default:
1175                         IEEE80211_DEBUG_SCAN("unsupported IE %d\n",
1176                                              info_element->id);
1177                         break;
1178                 }
1179
1180                 left -= sizeof(struct ieee80211_info_element_hdr) +
1181                         info_element->len;
1182                 info_element = (struct ieee80211_info_element *)
1183                         &info_element->data[info_element->len];
1184         }
1185 //by amy 080312
1186         network->HighestOperaRate = hOpRate;
1187 //by amy 080312
1188         network->mode = 0;
1189         if (stats->freq == IEEE80211_52GHZ_BAND)
1190                 network->mode = IEEE_A;
1191         else {
1192                 if (network->flags & NETWORK_HAS_OFDM)
1193                         network->mode |= IEEE_G;
1194                 if (network->flags & NETWORK_HAS_CCK)
1195                         network->mode |= IEEE_B;
1196         }
1197
1198         if (network->mode == 0) {
1199                 IEEE80211_DEBUG_SCAN("Filtered out '%s (" MAC_FMT ")' "
1200                                      "network.\n",
1201                                      escape_essid(network->ssid,
1202                                                   network->ssid_len),
1203                                      MAC_ARG(network->bssid));
1204                 return 1;
1205         }
1206
1207         if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
1208                 network->flags |= NETWORK_EMPTY_ESSID;
1209
1210         stats->signal = ieee80211_TranslateToDbm(stats->signalstrength);
1211         //stats->noise = stats->signal - stats->noise;
1212         stats->noise = ieee80211_TranslateToDbm(100 - stats->signalstrength) - 25;
1213         memcpy(&network->stats, stats, sizeof(network->stats));
1214
1215         return 0;
1216 }
1217
1218 static inline int is_same_network(struct ieee80211_network *src,
1219                                   struct ieee80211_network *dst,
1220                                   struct ieee80211_device * ieee)
1221 {
1222         /* A network is only a duplicate if the channel, BSSID, ESSID
1223          * and the capability field (in particular IBSS and BSS) all match.
1224          * We treat all <hidden> with the same BSSID and channel
1225          * as one network */
1226         return (((src->ssid_len == dst->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) &&  //YJ,mod,080819,for hidden ap
1227                 //((src->ssid_len == dst->ssid_len) &&
1228                 (src->channel == dst->channel) &&
1229                 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
1230                 (!memcmp(src->ssid, dst->ssid, src->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) && //YJ,mod,080819,for hidden ap
1231                 //!memcmp(src->ssid, dst->ssid, src->ssid_len) &&
1232                 ((src->capability & WLAN_CAPABILITY_IBSS) ==
1233                 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
1234                 ((src->capability & WLAN_CAPABILITY_BSS) ==
1235                 (dst->capability & WLAN_CAPABILITY_BSS)));
1236 }
1237
1238 inline void update_network(struct ieee80211_network *dst,
1239                                   struct ieee80211_network *src)
1240 {
1241         unsigned char quality = src->stats.signalstrength;
1242         unsigned char signal = 0;
1243         unsigned char noise = 0;
1244         if(dst->stats.signalstrength > 0) {
1245                 quality = (dst->stats.signalstrength * 5 + src->stats.signalstrength + 5)/6;
1246         }
1247         signal = ieee80211_TranslateToDbm(quality);
1248         //noise = signal - src->stats.noise;
1249         if(dst->stats.noise > 0)
1250                 noise = (dst->stats.noise * 5 + src->stats.noise)/6;
1251         //if(strcmp(dst->ssid, "linksys_lzm000") == 0)
1252 //      printk("ssid:%s, quality:%d, signal:%d\n", dst->ssid, quality, signal);
1253         memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats));
1254         dst->stats.signalstrength = quality;
1255         dst->stats.signal = signal;
1256 //      printk("==================>stats.signal is %d\n",dst->stats.signal);
1257         dst->stats.noise = noise;
1258
1259
1260         dst->capability = src->capability;
1261         memcpy(dst->rates, src->rates, src->rates_len);
1262         dst->rates_len = src->rates_len;
1263         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
1264         dst->rates_ex_len = src->rates_ex_len;
1265         dst->HighestOperaRate= src->HighestOperaRate;
1266         //printk("==========>in %s: src->ssid is %s,chan is %d\n",__func__,src->ssid,src->channel);
1267
1268         //YJ,add,080819,for hidden ap
1269         if(src->ssid_len > 0)
1270         {
1271                 //if(src->ssid_len == 13)
1272                 //      printk("=====================>>>>>>>> Dst ssid: %s Src ssid: %s\n", dst->ssid, src->ssid);
1273                 memset(dst->ssid, 0, dst->ssid_len);
1274                 dst->ssid_len = src->ssid_len;
1275                 memcpy(dst->ssid, src->ssid, src->ssid_len);
1276         }
1277         //YJ,add,080819,for hidden ap,end
1278
1279         dst->channel = src->channel;
1280         dst->mode = src->mode;
1281         dst->flags = src->flags;
1282         dst->time_stamp[0] = src->time_stamp[0];
1283         dst->time_stamp[1] = src->time_stamp[1];
1284
1285         dst->beacon_interval = src->beacon_interval;
1286         dst->listen_interval = src->listen_interval;
1287         dst->atim_window = src->atim_window;
1288         dst->dtim_period = src->dtim_period;
1289         dst->dtim_data = src->dtim_data;
1290         dst->last_dtim_sta_time[0] = src->last_dtim_sta_time[0];
1291         dst->last_dtim_sta_time[1] = src->last_dtim_sta_time[1];
1292 //      printk("update:%s, dtim_period:%x, dtim_data:%x\n", src->ssid, src->dtim_period, src->dtim_data);
1293         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
1294         dst->wpa_ie_len = src->wpa_ie_len;
1295         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
1296         dst->rsn_ie_len = src->rsn_ie_len;
1297
1298         dst->last_scanned = jiffies;
1299         /* dst->last_associate is not overwritten */
1300 // disable QoS process now, added by David 2006/7/25
1301 #if 1
1302         dst->wmm_info = src->wmm_info; //sure to exist in beacon or probe response frame.
1303 /*
1304         if((dst->wmm_info^src->wmm_info)&0x0f) {//Param Set Count change, update Parameter
1305           memcpy(dst->wmm_param, src->wmm_param, IEEE80211_AC_PRAM_LEN);
1306         }
1307 */
1308         if(src->wmm_param[0].ac_aci_acm_aifsn|| \
1309            src->wmm_param[1].ac_aci_acm_aifsn|| \
1310            src->wmm_param[2].ac_aci_acm_aifsn|| \
1311            src->wmm_param[3].ac_aci_acm_aifsn) {
1312           memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
1313         }
1314         dst->QoS_Enable = src->QoS_Enable;
1315 #else
1316         dst->QoS_Enable = 1;//for Rtl8187 simulation
1317 #endif
1318         dst->SignalStrength = src->SignalStrength;
1319         dst->Turbo_Enable = src->Turbo_Enable;
1320         dst->CountryIeLen = src->CountryIeLen;
1321         memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
1322 }
1323
1324
1325 inline void ieee80211_process_probe_response(
1326         struct ieee80211_device *ieee,
1327         struct ieee80211_probe_response *beacon,
1328         struct ieee80211_rx_stats *stats)
1329 {
1330         struct ieee80211_network network;
1331         struct ieee80211_network *target;
1332         struct ieee80211_network *oldest = NULL;
1333 #ifdef CONFIG_IEEE80211_DEBUG
1334         struct ieee80211_info_element *info_element = &beacon->info_element;
1335 #endif
1336         unsigned long flags;
1337         short renew;
1338         u8 wmm_info;
1339         u8 is_beacon = (WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == IEEE80211_STYPE_BEACON)? 1:0;  //YJ,add,080819,for hidden ap
1340
1341         memset(&network, 0, sizeof(struct ieee80211_network));
1342
1343         IEEE80211_DEBUG_SCAN(
1344                 "'%s' (" MAC_FMT "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1345                 escape_essid(info_element->data, info_element->len),
1346                 MAC_ARG(beacon->header.addr3),
1347                 (beacon->capability & (1<<0xf)) ? '1' : '0',
1348                 (beacon->capability & (1<<0xe)) ? '1' : '0',
1349                 (beacon->capability & (1<<0xd)) ? '1' : '0',
1350                 (beacon->capability & (1<<0xc)) ? '1' : '0',
1351                 (beacon->capability & (1<<0xb)) ? '1' : '0',
1352                 (beacon->capability & (1<<0xa)) ? '1' : '0',
1353                 (beacon->capability & (1<<0x9)) ? '1' : '0',
1354                 (beacon->capability & (1<<0x8)) ? '1' : '0',
1355                 (beacon->capability & (1<<0x7)) ? '1' : '0',
1356                 (beacon->capability & (1<<0x6)) ? '1' : '0',
1357                 (beacon->capability & (1<<0x5)) ? '1' : '0',
1358                 (beacon->capability & (1<<0x4)) ? '1' : '0',
1359                 (beacon->capability & (1<<0x3)) ? '1' : '0',
1360                 (beacon->capability & (1<<0x2)) ? '1' : '0',
1361                 (beacon->capability & (1<<0x1)) ? '1' : '0',
1362                 (beacon->capability & (1<<0x0)) ? '1' : '0');
1363
1364         if (ieee80211_network_init(ieee, beacon, &network, stats)) {
1365                 IEEE80211_DEBUG_SCAN("Dropped '%s' (" MAC_FMT ") via %s.\n",
1366                                      escape_essid(info_element->data,
1367                                                   info_element->len),
1368                                      MAC_ARG(beacon->header.addr3),
1369                                      WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
1370                                      IEEE80211_STYPE_PROBE_RESP ?
1371                                      "PROBE RESPONSE" : "BEACON");
1372                 return;
1373         }
1374
1375         // For Asus EeePc request,
1376         // (1) if wireless adapter receive get any 802.11d country code in AP beacon,
1377         //         wireless adapter should follow the country code.
1378         // (2)  If there is no any country code in beacon,
1379         //       then wireless adapter should do active scan from ch1~11 and
1380         //       passive scan from ch12~14
1381         if(ieee->bGlobalDomain)
1382         {
1383                 if (WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == IEEE80211_STYPE_PROBE_RESP)
1384                 {
1385                         // Case 1: Country code
1386                         if(IS_COUNTRY_IE_VALID(ieee) )
1387                         {
1388                                 if( !IsLegalChannel(ieee, network.channel) )
1389                                 {
1390                                         printk("GetScanInfo(): For Country code, filter probe response at channel(%d).\n", network.channel);
1391                                         return;
1392                                 }
1393                         }
1394                         // Case 2: No any country code.
1395                         else
1396                         {
1397                                 // Filter over channel ch12~14
1398                                 if(network.channel > 11)
1399                                 {
1400                                         printk("GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n", network.channel);
1401                                         return;
1402                                 }
1403                         }
1404                 }
1405                 else
1406                 {
1407                         // Case 1: Country code
1408                         if(IS_COUNTRY_IE_VALID(ieee) )
1409                         {
1410                                 if( !IsLegalChannel(ieee, network.channel) )
1411                                 {
1412                                         printk("GetScanInfo(): For Country code, filter beacon at channel(%d).\n",network.channel);
1413                                         return;
1414                                 }
1415                         }
1416                         // Case 2: No any country code.
1417                         else
1418                         {
1419                                 // Filter over channel ch12~14
1420                                 if(network.channel > 14)
1421                                 {
1422                                         printk("GetScanInfo(): For Global Domain, filter beacon at channel(%d).\n",network.channel);
1423                                         return;
1424                                 }
1425                         }
1426                 }
1427         }
1428         /* The network parsed correctly -- so now we scan our known networks
1429          * to see if we can find it in our list.
1430          *
1431          * NOTE:  This search is definitely not optimized.  Once its doing
1432          *        the "right thing" we'll optimize it for efficiency if
1433          *        necessary */
1434
1435         /* Search for this entry in the list and update it if it is
1436          * already there. */
1437
1438         spin_lock_irqsave(&ieee->lock, flags);
1439
1440         if(is_same_network(&ieee->current_network, &network, ieee)) {
1441                 wmm_info = ieee->current_network.wmm_info;
1442                 //YJ,add,080819,for hidden ap
1443                 if(is_beacon == 0)
1444                         network.flags = (~NETWORK_EMPTY_ESSID & network.flags)|(NETWORK_EMPTY_ESSID & ieee->current_network.flags);
1445                 else if(ieee->state == IEEE80211_LINKED)
1446                         ieee->NumRxBcnInPeriod++;
1447                 //YJ,add,080819,for hidden ap,end
1448                 //printk("====>network.ssid=%s cur_ssid=%s\n", network.ssid, ieee->current_network.ssid);
1449                 update_network(&ieee->current_network, &network);
1450         }
1451
1452         list_for_each_entry(target, &ieee->network_list, list) {
1453                 if (is_same_network(target, &network, ieee))
1454                         break;
1455                 if ((oldest == NULL) ||
1456                     (target->last_scanned < oldest->last_scanned))
1457                         oldest = target;
1458         }
1459
1460         /* If we didn't find a match, then get a new network slot to initialize
1461          * with this beacon's information */
1462         if (&target->list == &ieee->network_list) {
1463                 if (list_empty(&ieee->network_free_list)) {
1464                         /* If there are no more slots, expire the oldest */
1465                         list_del(&oldest->list);
1466                         target = oldest;
1467                         IEEE80211_DEBUG_SCAN("Expired '%s' (" MAC_FMT ") from "
1468                                              "network list.\n",
1469                                              escape_essid(target->ssid,
1470                                                           target->ssid_len),
1471                                              MAC_ARG(target->bssid));
1472                 } else {
1473                         /* Otherwise just pull from the free list */
1474                         target = list_entry(ieee->network_free_list.next,
1475                                             struct ieee80211_network, list);
1476                         list_del(ieee->network_free_list.next);
1477                 }
1478
1479
1480 #ifdef CONFIG_IEEE80211_DEBUG
1481                 IEEE80211_DEBUG_SCAN("Adding '%s' (" MAC_FMT ") via %s.\n",
1482                                      escape_essid(network.ssid,
1483                                                   network.ssid_len),
1484                                      MAC_ARG(network.bssid),
1485                                      WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
1486                                      IEEE80211_STYPE_PROBE_RESP ?
1487                                      "PROBE RESPONSE" : "BEACON");
1488 #endif
1489
1490                 memcpy(target, &network, sizeof(*target));
1491                 list_add_tail(&target->list, &ieee->network_list);
1492                 if(ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
1493                         ieee80211_softmac_new_net(ieee,&network);
1494         } else {
1495                 IEEE80211_DEBUG_SCAN("Updating '%s' (" MAC_FMT ") via %s.\n",
1496                                      escape_essid(target->ssid,
1497                                                   target->ssid_len),
1498                                      MAC_ARG(target->bssid),
1499                                      WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
1500                                      IEEE80211_STYPE_PROBE_RESP ?
1501                                      "PROBE RESPONSE" : "BEACON");
1502
1503                 /* we have an entry and we are going to update it. But this entry may
1504                  * be already expired. In this case we do the same as we found a new
1505                  * net and call the new_net handler
1506                  */
1507                 renew = !time_after(target->last_scanned + ieee->scan_age, jiffies);
1508                 //YJ,add,080819,for hidden ap
1509                 if(is_beacon == 0)
1510                         network.flags = (~NETWORK_EMPTY_ESSID & network.flags)|(NETWORK_EMPTY_ESSID & target->flags);
1511                 //if(strncmp(network.ssid, "linksys-c",9) == 0)
1512                 //      printk("====>2 network.ssid=%s FLAG=%d target.ssid=%s FLAG=%d\n", network.ssid, network.flags, target->ssid, target->flags);
1513                 if(((network.flags & NETWORK_EMPTY_ESSID) == NETWORK_EMPTY_ESSID) \
1514                     && (((network.ssid_len > 0) && (strncmp(target->ssid, network.ssid, network.ssid_len)))\
1515                     ||((ieee->current_network.ssid_len == network.ssid_len)&&(strncmp(ieee->current_network.ssid, network.ssid, network.ssid_len) == 0)&&(ieee->state == IEEE80211_NOLINK))))
1516                         renew = 1;
1517                 //YJ,add,080819,for hidden ap,end
1518                 update_network(target, &network);
1519                 if(renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
1520                         ieee80211_softmac_new_net(ieee,&network);
1521         }
1522
1523         spin_unlock_irqrestore(&ieee->lock, flags);
1524 }
1525
1526 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
1527                       struct ieee80211_hdr_4addr *header,
1528                       struct ieee80211_rx_stats *stats)
1529 {
1530         switch (WLAN_FC_GET_STYPE(header->frame_ctl)) {
1531
1532         case IEEE80211_STYPE_BEACON:
1533                 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
1534                                      WLAN_FC_GET_STYPE(header->frame_ctl));
1535                 IEEE80211_DEBUG_SCAN("Beacon\n");
1536                 ieee80211_process_probe_response(
1537                         ieee, (struct ieee80211_probe_response *)header, stats);
1538                 break;
1539
1540         case IEEE80211_STYPE_PROBE_RESP:
1541                 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1542                                      WLAN_FC_GET_STYPE(header->frame_ctl));
1543                 IEEE80211_DEBUG_SCAN("Probe response\n");
1544                 ieee80211_process_probe_response(
1545                         ieee, (struct ieee80211_probe_response *)header, stats);
1546                 break;
1547         }
1548 }