Pileus Git - ~andy/linux/blob - drivers/staging/rtl8192u/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 = (struct ieee80211_hdr_4addr *)skb->data;
  52         u16 fc = le16_to_cpu(hdr->frame_ctl);
  53
  54         skb->dev = ieee->dev;
  55         skb_reset_mac_header(skb);
  56
  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_QCTL_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_QCTL_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_QCTL_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_QCTL_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         /* On the struct stats definition there is written that
 218          * this is not mandatory.... but seems that the probe
 219          * response parser uses it
 220          */
 221         struct ieee80211_hdr_3addr *hdr = (struct ieee80211_hdr_3addr *)skb->data;
 222
 223         rx_stats->len = skb->len;
 224         ieee80211_rx_mgt(ieee,(struct ieee80211_hdr_4addr *)skb->data,rx_stats);
 225         //if ((ieee->state == IEEE80211_LINKED) && (memcmp(hdr->addr3, ieee->current_network.bssid, ETH_ALEN)))
 226         if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN)))//use ADDR1 to perform address matching for Management frames
 227         {
 228                 dev_kfree_skb_any(skb);
 229                 return 0;
 230         }
 231
 232         ieee80211_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
 233
 234         dev_kfree_skb_any(skb);
 235
 236         return 0;
 237
 238         #ifdef NOT_YET
 239         if (ieee->iw_mode == IW_MODE_MASTER) {
 240                 printk(KERN_DEBUG "%s: Master mode not yet supported.\n",
 241                        ieee->dev->name);
 242                 return 0;
 243 /*
 244   hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr_4addr *)
 245   skb->data);*/
 246         }
 247
 248         if (ieee->hostapd && type == IEEE80211_TYPE_MGMT) {
 249                 if (stype == WLAN_FC_STYPE_BEACON &&
 250                     ieee->iw_mode == IW_MODE_MASTER) {
 251                         struct sk_buff *skb2;
 252                         /* Process beacon frames also in kernel driver to
 253                          * update STA(AP) table statistics */
 254                         skb2 = skb_clone(skb, GFP_ATOMIC);
 255                         if (skb2)
 256                                 hostap_rx(skb2->dev, skb2, rx_stats);
 257                 }
 258
 259                 /* send management frames to the user space daemon for
 260                  * processing */
 261                 ieee->apdevstats.rx_packets++;
 262                 ieee->apdevstats.rx_bytes += skb->len;
 263                 prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
 264                 return 0;
 265         }
 266
 267             if (ieee->iw_mode == IW_MODE_MASTER) {
 268                 if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
 269                         printk(KERN_DEBUG "%s: unknown management frame "
 270                                "(type=0x%02x, stype=0x%02x) dropped\n",
 271                                skb->dev->name, type, stype);
 272                         return -1;
 273                 }
 274
 275                 hostap_rx(skb->dev, skb, rx_stats);
 276                 return 0;
 277         }
 278
 279         printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame "
 280                "received in non-Host AP mode\n", skb->dev->name);
 281         return -1;
 282         #endif
 283 }
 284
 285
 286
 287 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
 288 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
 289 static unsigned char rfc1042_header[] =
 290 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
 291 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
 292 static unsigned char bridge_tunnel_header[] =
 293 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
 294 /* No encapsulation header if EtherType < 0x600 (=length) */
 295
 296 /* Called by ieee80211_rx_frame_decrypt */
 297 static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee,
 298                                     struct sk_buff *skb, size_t hdrlen)
 299 {
 300         struct net_device *dev = ieee->dev;
 301         u16 fc, ethertype;
 302         struct ieee80211_hdr_4addr *hdr;
 303         u8 *pos;
 304
 305         if (skb->len < 24)
 306                 return 0;
 307
 308         hdr = (struct ieee80211_hdr_4addr *) skb->data;
 309         fc = le16_to_cpu(hdr->frame_ctl);
 310
 311         /* check that the frame is unicast frame to us */
 312         if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 313             IEEE80211_FCTL_TODS &&
 314             memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
 315             memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
 316                 /* ToDS frame with own addr BSSID and DA */
 317         } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 318                    IEEE80211_FCTL_FROMDS &&
 319                    memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
 320                 /* FromDS frame with own addr as DA */
 321         } else
 322                 return 0;
 323
 324         if (skb->len < 24 + 8)
 325                 return 0;
 326
 327         /* check for port access entity Ethernet type */
 328 //      pos = skb->data + 24;
 329         pos = skb->data + hdrlen;
 330         ethertype = (pos[6] << 8) | pos[7];
 331         if (ethertype == ETH_P_PAE)
 332                 return 1;
 333
 334         return 0;
 335 }
 336
 337 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
 338 static inline int
 339 ieee80211_rx_frame_decrypt(struct ieee80211_device *ieee, struct sk_buff *skb,
 340                            struct ieee80211_crypt_data *crypt)
 341 {
 342         struct ieee80211_hdr_4addr *hdr;
 343         int res, hdrlen;
 344
 345         if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
 346                 return 0;
 347         if (ieee->hwsec_active)
 348         {
 349                 cb_desc *tcb_desc = (cb_desc *)(skb->cb+ MAX_DEV_ADDR_SIZE);
 350                 tcb_desc->bHwSec = 1;
 351         }
 352         hdr = (struct ieee80211_hdr_4addr *) skb->data;
 353         hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 354
 355 #ifdef CONFIG_IEEE80211_CRYPT_TKIP
 356         if (ieee->tkip_countermeasures &&
 357             strcmp(crypt->ops->name, "TKIP") == 0) {
 358                 if (net_ratelimit()) {
 359                         printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
 360                                "received packet from %pM\n",
 361                                ieee->dev->name, hdr->addr2);
 362                 }
 363                 return -1;
 364         }
 365 #endif
 366
 367         atomic_inc(&crypt->refcnt);
 368         res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
 369         atomic_dec(&crypt->refcnt);
 370         if (res < 0) {
 371                 IEEE80211_DEBUG_DROP(
 372                         "decryption failed (SA=%pM"
 373                         ") res=%d\n", hdr->addr2, res);
 374                 if (res == -2)
 375                         IEEE80211_DEBUG_DROP("Decryption failed ICV "
 376                                              "mismatch (key %d)\n",
 377                                              skb->data[hdrlen + 3] >> 6);
 378                 ieee->ieee_stats.rx_discards_undecryptable++;
 379                 return -1;
 380         }
 381
 382         return res;
 383 }
 384
 385
 386 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
 387 static inline int
 388 ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device *ieee, struct sk_buff *skb,
 389                              int keyidx, struct ieee80211_crypt_data *crypt)
 390 {
 391         struct ieee80211_hdr_4addr *hdr;
 392         int res, hdrlen;
 393
 394         if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
 395                 return 0;
 396         if (ieee->hwsec_active)
 397         {
 398                 cb_desc *tcb_desc = (cb_desc *)(skb->cb+ MAX_DEV_ADDR_SIZE);
 399                 tcb_desc->bHwSec = 1;
 400         }
 401
 402         hdr = (struct ieee80211_hdr_4addr *) skb->data;
 403         hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 404
 405         atomic_inc(&crypt->refcnt);
 406         res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
 407         atomic_dec(&crypt->refcnt);
 408         if (res < 0) {
 409                 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
 410                        " (SA=%pM keyidx=%d)\n",
 411                        ieee->dev->name, hdr->addr2, keyidx);
 412                 return -1;
 413         }
 414
 415         return 0;
 416 }
 417
 418
 419 /* this function is stolen from ipw2200 driver*/
 420 #define IEEE_PACKET_RETRY_TIME (5*HZ)
 421 static int is_duplicate_packet(struct ieee80211_device *ieee,
 422                                       struct ieee80211_hdr_4addr *header)
 423 {
 424         u16 fc = le16_to_cpu(header->frame_ctl);
 425         u16 sc = le16_to_cpu(header->seq_ctl);
 426         u16 seq = WLAN_GET_SEQ_SEQ(sc);
 427         u16 frag = WLAN_GET_SEQ_FRAG(sc);
 428         u16 *last_seq, *last_frag;
 429         unsigned long *last_time;
 430         struct ieee80211_hdr_3addrqos *hdr_3addrqos;
 431         struct ieee80211_hdr_4addrqos *hdr_4addrqos;
 432         u8 tid;
 433
 434
 435         //TO2DS and QoS
 436         if(((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
 437           hdr_4addrqos = (struct ieee80211_hdr_4addrqos *)header;
 438           tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID;
 439           tid = UP2AC(tid);
 440           tid ++;
 441         } else if(IEEE80211_QOS_HAS_SEQ(fc)) { //QoS
 442           hdr_3addrqos = (struct ieee80211_hdr_3addrqos *)header;
 443           tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID;
 444           tid = UP2AC(tid);
 445           tid ++;
 446         } else { // no QoS
 447           tid = 0;
 448         }
 449
 450         switch (ieee->iw_mode) {
 451         case IW_MODE_ADHOC:
 452         {
 453                 struct list_head *p;
 454                 struct ieee_ibss_seq *entry = NULL;
 455                 u8 *mac = header->addr2;
 456                 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
 457
 458                 list_for_each(p, &ieee->ibss_mac_hash[index]) {
 459                         entry = list_entry(p, struct ieee_ibss_seq, list);
 460                         if (!memcmp(entry->mac, mac, ETH_ALEN))
 461                                 break;
 462                 }
 463         //      if (memcmp(entry->mac, mac, ETH_ALEN)){
 464                 if (p == &ieee->ibss_mac_hash[index]) {
 465                         entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC);
 466                         if (!entry) {
 467                                 printk(KERN_WARNING "Cannot malloc new mac entry\n");
 468                                 return 0;
 469                         }
 470                         memcpy(entry->mac, mac, ETH_ALEN);
 471                         entry->seq_num[tid] = seq;
 472                         entry->frag_num[tid] = frag;
 473                         entry->packet_time[tid] = jiffies;
 474                         list_add(&entry->list, &ieee->ibss_mac_hash[index]);
 475                         return 0;
 476                 }
 477                 last_seq = &entry->seq_num[tid];
 478                 last_frag = &entry->frag_num[tid];
 479                 last_time = &entry->packet_time[tid];
 480                 break;
 481         }
 482
 483         case IW_MODE_INFRA:
 484                 last_seq = &ieee->last_rxseq_num[tid];
 485                 last_frag = &ieee->last_rxfrag_num[tid];
 486                 last_time = &ieee->last_packet_time[tid];
 487
 488                 break;
 489         default:
 490                 return 0;
 491         }
 492
 493 //      if(tid != 0) {
 494 //              printk(KERN_WARNING ":)))))))))))%x %x %x, fc(%x)\n", tid, *last_seq, seq, header->frame_ctl);
 495 //      }
 496         if ((*last_seq == seq) &&
 497             time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
 498                 if (*last_frag == frag){
 499                         //printk(KERN_WARNING "[1] go drop!\n");
 500                         goto drop;
 501
 502                 }
 503                 if (*last_frag + 1 != frag)
 504                         /* out-of-order fragment */
 505                         //printk(KERN_WARNING "[2] go drop!\n");
 506                         goto drop;
 507         } else
 508                 *last_seq = seq;
 509
 510         *last_frag = frag;
 511         *last_time = jiffies;
 512         return 0;
 513
 514 drop:
 515 //      BUG_ON(!(fc & IEEE80211_FCTL_RETRY));
 516 //      printk("DUP\n");
 517
 518         return 1;
 519 }
 520 bool
 521 AddReorderEntry(
 522         PRX_TS_RECORD                   pTS,
 523         PRX_REORDER_ENTRY               pReorderEntry
 524         )
 525 {
 526         struct list_head *pList = &pTS->RxPendingPktList;
 527         while(pList->next != &pTS->RxPendingPktList)
 528         {
 529                 if( SN_LESS(pReorderEntry->SeqNum, ((PRX_REORDER_ENTRY)list_entry(pList->next,RX_REORDER_ENTRY,List))->SeqNum) )
 530                 {
 531                         pList = pList->next;
 532                 }
 533                 else if( SN_EQUAL(pReorderEntry->SeqNum, ((PRX_REORDER_ENTRY)list_entry(pList->next,RX_REORDER_ENTRY,List))->SeqNum) )
 534                 {
 535                         return false;
 536                 }
 537                 else
 538                 {
 539                         break;
 540                 }
 541         }
 542         pReorderEntry->List.next = pList->next;
 543         pReorderEntry->List.next->prev = &pReorderEntry->List;
 544         pReorderEntry->List.prev = pList;
 545         pList->next = &pReorderEntry->List;
 546
 547         return true;
 548 }
 549
 550 void ieee80211_indicate_packets(struct ieee80211_device *ieee, struct ieee80211_rxb **prxbIndicateArray,u8  index)
 551 {
 552         u8 i = 0 , j=0;
 553         u16 ethertype;
 554 //      if(index > 1)
 555 //              IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): hahahahhhh, We indicate packet from reorder list, index is %u\n",__FUNCTION__,index);
 556         for(j = 0; j<index; j++)
 557         {
 558 //added by amy for reorder
 559                 struct ieee80211_rxb *prxb = prxbIndicateArray[j];
 560                 for(i = 0; i<prxb->nr_subframes; i++) {
 561                         struct sk_buff *sub_skb = prxb->subframes[i];
 562
 563                 /* convert hdr + possible LLC headers into Ethernet header */
 564                         ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
 565                         if (sub_skb->len >= 8 &&
 566                                 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
 567                                   ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
 568                                  memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
 569                         /* remove RFC1042 or Bridge-Tunnel encapsulation and
 570                          * replace EtherType */
 571                                 skb_pull(sub_skb, SNAP_SIZE);
 572                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
 573                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
 574                         } else {
 575                                 u16 len;
 576                         /* Leave Ethernet header part of hdr and full payload */
 577                                 len = htons(sub_skb->len);
 578                                 memcpy(skb_push(sub_skb, 2), &len, 2);
 579                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
 580                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
 581                         }
 582                         //stats->rx_packets++;
 583                         //stats->rx_bytes += sub_skb->len;
 584
 585                 /* Indicat the packets to upper layer */
 586                         if (sub_skb) {
 587                                 //printk("0skb_len(%d)\n", skb->len);
 588                                 sub_skb->protocol = eth_type_trans(sub_skb, ieee->dev);
 589                                 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
 590                                 sub_skb->dev = ieee->dev;
 591                                 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
 592                                 //skb->ip_summed = CHECKSUM_UNNECESSARY; /* 802.11 crc not sufficient */
 593                                 ieee->last_rx_ps_time = jiffies;
 594                                 //printk("1skb_len(%d)\n", skb->len);
 595                                 netif_rx(sub_skb);
 596                         }
 597                 }
 598                 kfree(prxb);
 599                 prxb = NULL;
 600         }
 601 }
 602
 603
 604 void RxReorderIndicatePacket( struct ieee80211_device *ieee,
 605                 struct ieee80211_rxb *prxb,
 606                 PRX_TS_RECORD           pTS,
 607                 u16                     SeqNum)
 608 {
 609         PRT_HIGH_THROUGHPUT     pHTInfo = ieee->pHTInfo;
 610         PRX_REORDER_ENTRY       pReorderEntry = NULL;
 611         struct ieee80211_rxb *prxbIndicateArray[REORDER_WIN_SIZE];
 612         u8                      WinSize = pHTInfo->RxReorderWinSize;
 613         u16                     WinEnd = (pTS->RxIndicateSeq + WinSize -1)%4096;
 614         u8                      index = 0;
 615         bool                    bMatchWinStart = false, bPktInBuf = false;
 616         IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): Seq is %d,pTS->RxIndicateSeq is %d, WinSize is %d\n",__FUNCTION__,SeqNum,pTS->RxIndicateSeq,WinSize);
 617         /* Rx Reorder initialize condition.*/
 618         if(pTS->RxIndicateSeq == 0xffff) {
 619                 pTS->RxIndicateSeq = SeqNum;
 620         }
 621
 622         /* Drop out the packet which SeqNum is smaller than WinStart */
 623         if(SN_LESS(SeqNum, pTS->RxIndicateSeq)) {
 624                 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
 625                                  pTS->RxIndicateSeq, SeqNum);
 626                 pHTInfo->RxReorderDropCounter++;
 627                 {
 628                         int i;
 629                         for(i =0; i < prxb->nr_subframes; i++) {
 630                                 dev_kfree_skb(prxb->subframes[i]);
 631                         }
 632                         kfree(prxb);
 633                         prxb = NULL;
 634                 }
 635                 return;
 636         }
 637
 638         /*
 639          * Sliding window manipulation. Conditions includes:
 640          * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
 641          * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
 642          */
 643         if(SN_EQUAL(SeqNum, pTS->RxIndicateSeq)) {
 644                 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
 645                 bMatchWinStart = true;
 646         } else if(SN_LESS(WinEnd, SeqNum)) {
 647                 if(SeqNum >= (WinSize - 1)) {
 648                         pTS->RxIndicateSeq = SeqNum + 1 -WinSize;
 649                 } else {
 650                         pTS->RxIndicateSeq = 4095 - (WinSize - (SeqNum +1)) + 1;
 651                 }
 652                 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Window Shift! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum);
 653         }
 654
 655         /*
 656          * Indication process.
 657          * After Packet dropping and Sliding Window shifting as above, we can now just indicate the packets
 658          * with the SeqNum smaller than latest WinStart and buffer other packets.
 659          */
 660         /* For Rx Reorder condition:
 661          * 1. All packets with SeqNum smaller than WinStart => Indicate
 662          * 2. All packets with SeqNum larger than or equal to WinStart => Buffer it.
 663          */
 664         if(bMatchWinStart) {
 665                 /* Current packet is going to be indicated.*/
 666                 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Packets indication!! IndicateSeq: %d, NewSeq: %d\n",\
 667                                 pTS->RxIndicateSeq, SeqNum);
 668                 prxbIndicateArray[0] = prxb;
 669 //              printk("========================>%s(): SeqNum is %d\n",__FUNCTION__,SeqNum);
 670                 index = 1;
 671         } else {
 672                 /* Current packet is going to be inserted into pending list.*/
 673                 //IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): We RX no ordered packed, insert to ordered list\n",__FUNCTION__);
 674                 if(!list_empty(&ieee->RxReorder_Unused_List)) {
 675                         pReorderEntry = (PRX_REORDER_ENTRY)list_entry(ieee->RxReorder_Unused_List.next,RX_REORDER_ENTRY,List);
 676                         list_del_init(&pReorderEntry->List);
 677
 678                         /* Make a reorder entry and insert into a the packet list.*/
 679                         pReorderEntry->SeqNum = SeqNum;
 680                         pReorderEntry->prxb = prxb;
 681         //              IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): pREorderEntry->SeqNum is %d\n",__FUNCTION__,pReorderEntry->SeqNum);
 682
 683                         if(!AddReorderEntry(pTS, pReorderEntry)) {
 684                                 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): Duplicate packet is dropped!! IndicateSeq: %d, NewSeq: %d\n",
 685                                         __FUNCTION__, pTS->RxIndicateSeq, SeqNum);
 686                                 list_add_tail(&pReorderEntry->List,&ieee->RxReorder_Unused_List);
 687                                 {
 688                                         int i;
 689                                         for(i =0; i < prxb->nr_subframes; i++) {
 690                                                 dev_kfree_skb(prxb->subframes[i]);
 691                                         }
 692                                         kfree(prxb);
 693                                         prxb = NULL;
 694                                 }
 695                         } else {
 696                                 IEEE80211_DEBUG(IEEE80211_DL_REORDER,
 697                                          "Pkt insert into buffer!! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum);
 698                         }
 699                 }
 700                 else {
 701                         /*
 702                          * Packets are dropped if there is not enough reorder entries.
 703                          * This part shall be modified!! We can just indicate all the
 704                          * packets in buffer and get reorder entries.
 705                          */
 706                         IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): There is no reorder entry!! Packet is dropped!!\n");
 707                         {
 708                                 int i;
 709                                 for(i =0; i < prxb->nr_subframes; i++) {
 710                                         dev_kfree_skb(prxb->subframes[i]);
 711                                 }
 712                                 kfree(prxb);
 713                                 prxb = NULL;
 714                         }
 715                 }
 716         }
 717
 718         /* Check if there is any packet need indicate.*/
 719         while(!list_empty(&pTS->RxPendingPktList)) {
 720                 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): start RREORDER indicate\n",__FUNCTION__);
 721                 pReorderEntry = (PRX_REORDER_ENTRY)list_entry(pTS->RxPendingPktList.prev,RX_REORDER_ENTRY,List);
 722                 if( SN_LESS(pReorderEntry->SeqNum, pTS->RxIndicateSeq) ||
 723                                 SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
 724                 {
 725                         /* This protect buffer from overflow. */
 726                         if(index >= REORDER_WIN_SIZE) {
 727                                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): Buffer overflow!! \n");
 728                                 bPktInBuf = true;
 729                                 break;
 730                         }
 731
 732                         list_del_init(&pReorderEntry->List);
 733
 734                         if(SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
 735                                 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
 736
 737                         IEEE80211_DEBUG(IEEE80211_DL_REORDER,"Packets indication!! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum);
 738                         prxbIndicateArray[index] = pReorderEntry->prxb;
 739                 //      printk("========================>%s(): pReorderEntry->SeqNum is %d\n",__FUNCTION__,pReorderEntry->SeqNum);
 740                         index++;
 741
 742                         list_add_tail(&pReorderEntry->List,&ieee->RxReorder_Unused_List);
 743                 } else {
 744                         bPktInBuf = true;
 745                         break;
 746                 }
 747         }
 748
 749         /* Handling pending timer. Set this timer to prevent from long time Rx buffering.*/
 750         if(index>0) {
 751                 // Cancel previous pending timer.
 752         //      del_timer_sync(&pTS->RxPktPendingTimer);
 753                 pTS->RxTimeoutIndicateSeq = 0xffff;
 754
 755                 // Indicate packets
 756                 if(index>REORDER_WIN_SIZE){
 757                         IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): Rx Reorer buffer full!! \n");
 758                         return;
 759                 }
 760                 ieee80211_indicate_packets(ieee, prxbIndicateArray, index);
 761         }
 762
 763         if(bPktInBuf && pTS->RxTimeoutIndicateSeq==0xffff) {
 764                 // Set new pending timer.
 765                 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): SET rx timeout timer\n", __FUNCTION__);
 766                 pTS->RxTimeoutIndicateSeq = pTS->RxIndicateSeq;
 767                 if(timer_pending(&pTS->RxPktPendingTimer))
 768                         del_timer_sync(&pTS->RxPktPendingTimer);
 769                 pTS->RxPktPendingTimer.expires = jiffies + MSECS(pHTInfo->RxReorderPendingTime);
 770                 add_timer(&pTS->RxPktPendingTimer);
 771         }
 772 }
 773
 774 u8 parse_subframe(struct sk_buff *skb,
 775                   struct ieee80211_rx_stats *rx_stats,
 776                   struct ieee80211_rxb *rxb,u8 *src,u8 *dst)
 777 {
 778         struct ieee80211_hdr_3addr  *hdr = (struct ieee80211_hdr_3addr *)skb->data;
 779         u16             fc = le16_to_cpu(hdr->frame_ctl);
 780
 781         u16             LLCOffset= sizeof(struct ieee80211_hdr_3addr);
 782         u16             ChkLength;
 783         bool            bIsAggregateFrame = false;
 784         u16             nSubframe_Length;
 785         u8              nPadding_Length = 0;
 786         u16             SeqNum=0;
 787
 788         struct sk_buff *sub_skb;
 789         u8             *data_ptr;
 790         /* just for debug purpose */
 791         SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl));
 792
 793         if((IEEE80211_QOS_HAS_SEQ(fc))&&\
 794                         (((frameqos *)(skb->data + IEEE80211_3ADDR_LEN))->field.reserved)) {
 795                 bIsAggregateFrame = true;
 796         }
 797
 798         if(IEEE80211_QOS_HAS_SEQ(fc)) {
 799                 LLCOffset += 2;
 800         }
 801
 802         if(rx_stats->bContainHTC) {
 803                 LLCOffset += sHTCLng;
 804         }
 805         //printk("ChkLength = %d\n", LLCOffset);
 806         // Null packet, don't indicate it to upper layer
 807         ChkLength = LLCOffset;/* + (Frame_WEP(frame)!=0 ?Adapter->MgntInfo.SecurityInfo.EncryptionHeadOverhead:0);*/
 808
 809         if( skb->len <= ChkLength ) {
 810                 return 0;
 811         }
 812
 813         skb_pull(skb, LLCOffset);
 814
 815         if(!bIsAggregateFrame) {
 816                 rxb->nr_subframes = 1;
 817 #ifdef JOHN_NOCPY
 818                 rxb->subframes[0] = skb;
 819 #else
 820                 rxb->subframes[0] = skb_copy(skb, GFP_ATOMIC);
 821 #endif
 822
 823                 memcpy(rxb->src,src,ETH_ALEN);
 824                 memcpy(rxb->dst,dst,ETH_ALEN);
 825                 //IEEE80211_DEBUG_DATA(IEEE80211_DL_RX,skb->data,skb->len);
 826                 return 1;
 827         } else {
 828                 rxb->nr_subframes = 0;
 829                 memcpy(rxb->src,src,ETH_ALEN);
 830                 memcpy(rxb->dst,dst,ETH_ALEN);
 831                 while(skb->len > ETHERNET_HEADER_SIZE) {
 832                         /* Offset 12 denote 2 mac address */
 833                         nSubframe_Length = *((u16 *)(skb->data + 12));
 834                         //==m==>change the length order
 835                         nSubframe_Length = (nSubframe_Length>>8) + (nSubframe_Length<<8);
 836
 837                         if(skb->len<(ETHERNET_HEADER_SIZE + nSubframe_Length)) {
 838                                 printk("%s: A-MSDU parse error!! pRfd->nTotalSubframe : %d\n",\
 839                                                 __FUNCTION__,rxb->nr_subframes);
 840                                 printk("%s: A-MSDU parse error!! Subframe Length: %d\n",__FUNCTION__, nSubframe_Length);
 841                                 printk("nRemain_Length is %d and nSubframe_Length is : %d\n",skb->len,nSubframe_Length);
 842                                 printk("The Packet SeqNum is %d\n",SeqNum);
 843                                 return 0;
 844                         }
 845
 846                         /* move the data point to data content */
 847                         skb_pull(skb, ETHERNET_HEADER_SIZE);
 848
 849 #ifdef JOHN_NOCPY
 850                         sub_skb = skb_clone(skb, GFP_ATOMIC);
 851                         sub_skb->len = nSubframe_Length;
 852                         sub_skb->tail = sub_skb->data + nSubframe_Length;
 853 #else
 854                         /* Allocate new skb for releasing to upper layer */
 855                         sub_skb = dev_alloc_skb(nSubframe_Length + 12);
 856                         skb_reserve(sub_skb, 12);
 857                         data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
 858                         memcpy(data_ptr,skb->data,nSubframe_Length);
 859 #endif
 860                         rxb->subframes[rxb->nr_subframes++] = sub_skb;
 861                         if(rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
 862                                 IEEE80211_DEBUG_RX("ParseSubframe(): Too many Subframes! Packets dropped!\n");
 863                                 break;
 864                         }
 865                         skb_pull(skb,nSubframe_Length);
 866
 867                         if(skb->len != 0) {
 868                                 nPadding_Length = 4 - ((nSubframe_Length + ETHERNET_HEADER_SIZE) % 4);
 869                                 if(nPadding_Length == 4) {
 870                                         nPadding_Length = 0;
 871                                 }
 872
 873                                 if(skb->len < nPadding_Length) {
 874                                         return 0;
 875                                 }
 876
 877                                 skb_pull(skb,nPadding_Length);
 878                         }
 879                 }
 880 #ifdef JOHN_NOCPY
 881                 dev_kfree_skb(skb);
 882 #endif
 883                 //{just for debug added by david
 884                 //printk("AMSDU::rxb->nr_subframes = %d\n",rxb->nr_subframes);
 885                 //}
 886                 return rxb->nr_subframes;
 887         }
 888 }
 889
 890 /* All received frames are sent to this function. @skb contains the frame in
 891  * IEEE 802.11 format, i.e., in the format it was sent over air.
 892  * This function is called only as a tasklet (software IRQ). */
 893 int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
 894                  struct ieee80211_rx_stats *rx_stats)
 895 {
 896         struct net_device *dev = ieee->dev;
 897         struct ieee80211_hdr_4addr *hdr;
 898         //struct ieee80211_hdr_3addrqos *hdr;
 899
 900         size_t hdrlen;
 901         u16 fc, type, stype, sc;
 902         struct net_device_stats *stats;
 903         unsigned int frag;
 904         u8 *payload;
 905         u16 ethertype;
 906         //added by amy for reorder
 907         u8      TID = 0;
 908         u16     SeqNum = 0;
 909         PRX_TS_RECORD pTS = NULL;
 910         //bool bIsAggregateFrame = false;
 911         //added by amy for reorder
 912 #ifdef NOT_YET
 913         struct net_device *wds = NULL;
 914         struct sk_buff *skb2 = NULL;
 915         struct net_device *wds = NULL;
 916         int frame_authorized = 0;
 917         int from_assoc_ap = 0;
 918         void *sta = NULL;
 919 #endif
 920 //      u16 qos_ctl = 0;
 921         u8 dst[ETH_ALEN];
 922         u8 src[ETH_ALEN];
 923         u8 bssid[ETH_ALEN];
 924         struct ieee80211_crypt_data *crypt = NULL;
 925         int keyidx = 0;
 926
 927         int i;
 928         struct ieee80211_rxb *rxb = NULL;
 929         // cheat the the hdr type
 930         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 931         stats = &ieee->stats;
 932
 933         if (skb->len < 10) {
 934                 printk(KERN_INFO "%s: SKB length < 10\n",
 935                        dev->name);
 936                 goto rx_dropped;
 937         }
 938
 939         fc = le16_to_cpu(hdr->frame_ctl);
 940         type = WLAN_FC_GET_TYPE(fc);
 941         stype = WLAN_FC_GET_STYPE(fc);
 942         sc = le16_to_cpu(hdr->seq_ctl);
 943
 944         frag = WLAN_GET_SEQ_FRAG(sc);
 945         hdrlen = ieee80211_get_hdrlen(fc);
 946
 947         if(HTCCheck(ieee, skb->data))
 948         {
 949                 if(net_ratelimit())
 950                 printk("find HTCControl\n");
 951                 hdrlen += 4;
 952                 rx_stats->bContainHTC = 1;
 953         }
 954
 955         //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
 956 #ifdef NOT_YET
 957 #if WIRELESS_EXT > 15
 958         /* Put this code here so that we avoid duplicating it in all
 959          * Rx paths. - Jean II */
 960 #ifdef IW_WIRELESS_SPY          /* defined in iw_handler.h */
 961         /* If spy monitoring on */
 962         if (iface->spy_data.spy_number > 0) {
 963                 struct iw_quality wstats;
 964                 wstats.level = rx_stats->rssi;
 965                 wstats.noise = rx_stats->noise;
 966                 wstats.updated = 6;     /* No qual value */
 967                 /* Update spy records */
 968                 wireless_spy_update(dev, hdr->addr2, &wstats);
 969         }
 970 #endif /* IW_WIRELESS_SPY */
 971 #endif /* WIRELESS_EXT > 15 */
 972         hostap_update_rx_stats(local->ap, hdr, rx_stats);
 973 #endif
 974
 975 #if WIRELESS_EXT > 15
 976         if (ieee->iw_mode == IW_MODE_MONITOR) {
 977                 ieee80211_monitor_rx(ieee, skb, rx_stats);
 978                 stats->rx_packets++;
 979                 stats->rx_bytes += skb->len;
 980                 return 1;
 981         }
 982 #endif
 983         if (ieee->host_decrypt) {
 984                 int idx = 0;
 985                 if (skb->len >= hdrlen + 3)
 986                         idx = skb->data[hdrlen + 3] >> 6;
 987                 crypt = ieee->crypt[idx];
 988 #ifdef NOT_YET
 989                 sta = NULL;
 990
 991                 /* Use station specific key to override default keys if the
 992                  * receiver address is a unicast address ("individual RA"). If
 993                  * bcrx_sta_key parameter is set, station specific key is used
 994                  * even with broad/multicast targets (this is against IEEE
 995                  * 802.11, but makes it easier to use different keys with
 996                  * stations that do not support WEP key mapping). */
 997
 998                 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
 999                         (void) hostap_handle_sta_crypto(local, hdr, &crypt,
1000                                                         &sta);
1001 #endif
1002
1003                 /* allow NULL decrypt to indicate an station specific override
1004                  * for default encryption */
1005                 if (crypt && (crypt->ops == NULL ||
1006                               crypt->ops->decrypt_mpdu == NULL))
1007                         crypt = NULL;
1008
1009                 if (!crypt && (fc & IEEE80211_FCTL_WEP)) {
1010                         /* This seems to be triggered by some (multicast?)
1011                          * frames from other than current BSS, so just drop the
1012                          * frames silently instead of filling system log with
1013                          * these reports. */
1014                         IEEE80211_DEBUG_DROP("Decryption failed (not set)"
1015                                              " (SA=%pM)\n",
1016                                              hdr->addr2);
1017                         ieee->ieee_stats.rx_discards_undecryptable++;
1018                         goto rx_dropped;
1019                 }
1020         }
1021
1022         if (skb->len < IEEE80211_DATA_HDR3_LEN)
1023                 goto rx_dropped;
1024
1025         // if QoS enabled, should check the sequence for each of the AC
1026         if( (ieee->pHTInfo->bCurRxReorderEnable == false) || !ieee->current_network.qos_data.active|| !IsDataFrame(skb->data) || IsLegacyDataFrame(skb->data)){
1027                 if (is_duplicate_packet(ieee, hdr))
1028                 goto rx_dropped;
1029
1030         }
1031         else
1032         {
1033                 PRX_TS_RECORD pRxTS = NULL;
1034                         //IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): QOS ENABLE AND RECEIVE QOS DATA , we will get Ts, tid:%d\n",__FUNCTION__, tid);
1035                 if(GetTs(
1036                                 ieee,
1037                                 (PTS_COMMON_INFO *) &pRxTS,
1038                                 hdr->addr2,
1039                                 (u8)Frame_QoSTID((u8 *)(skb->data)),
1040                                 RX_DIR,
1041                                 true))
1042                 {
1043
1044                 //      IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): pRxTS->RxLastFragNum is %d,frag is %d,pRxTS->RxLastSeqNum is %d,seq is %d\n",__FUNCTION__,pRxTS->RxLastFragNum,frag,pRxTS->RxLastSeqNum,WLAN_GET_SEQ_SEQ(sc));
1045                         if(     (fc & (1<<11))  &&
1046                                         (frag == pRxTS->RxLastFragNum) &&
1047                                         (WLAN_GET_SEQ_SEQ(sc) == pRxTS->RxLastSeqNum)   )
1048                         {
1049                                 goto rx_dropped;
1050                         }
1051                         else
1052                         {
1053                                 pRxTS->RxLastFragNum = frag;
1054                                 pRxTS->RxLastSeqNum = WLAN_GET_SEQ_SEQ(sc);
1055                         }
1056                 }
1057                 else
1058                 {
1059                         IEEE80211_DEBUG(IEEE80211_DL_ERR, "%s(): No TS!! Skip the check!!\n",__FUNCTION__);
1060                         goto rx_dropped;
1061                 }
1062         }
1063         if (type == IEEE80211_FTYPE_MGMT) {
1064
1065
1066         //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
1067                 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
1068                         goto rx_dropped;
1069                 else
1070                         goto rx_exit;
1071         }
1072
1073         /* Data frame - extract src/dst addresses */
1074         switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
1075         case IEEE80211_FCTL_FROMDS:
1076                 memcpy(dst, hdr->addr1, ETH_ALEN);
1077                 memcpy(src, hdr->addr3, ETH_ALEN);
1078                 memcpy(bssid, hdr->addr2, ETH_ALEN);
1079                 break;
1080         case IEEE80211_FCTL_TODS:
1081                 memcpy(dst, hdr->addr3, ETH_ALEN);
1082                 memcpy(src, hdr->addr2, ETH_ALEN);
1083                 memcpy(bssid, hdr->addr1, ETH_ALEN);
1084                 break;
1085         case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
1086                 if (skb->len < IEEE80211_DATA_HDR4_LEN)
1087                         goto rx_dropped;
1088                 memcpy(dst, hdr->addr3, ETH_ALEN);
1089                 memcpy(src, hdr->addr4, ETH_ALEN);
1090                 memcpy(bssid, ieee->current_network.bssid, ETH_ALEN);
1091                 break;
1092         case 0:
1093                 memcpy(dst, hdr->addr1, ETH_ALEN);
1094                 memcpy(src, hdr->addr2, ETH_ALEN);
1095                 memcpy(bssid, hdr->addr3, ETH_ALEN);
1096                 break;
1097         }
1098
1099 #ifdef NOT_YET
1100         if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
1101                 goto rx_dropped;
1102         if (wds) {
1103                 skb->dev = dev = wds;
1104                 stats = hostap_get_stats(dev);
1105         }
1106
1107         if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
1108             (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS &&
1109             ieee->stadev &&
1110             memcmp(hdr->addr2, ieee->assoc_ap_addr, ETH_ALEN) == 0) {
1111                 /* Frame from BSSID of the AP for which we are a client */
1112                 skb->dev = dev = ieee->stadev;
1113                 stats = hostap_get_stats(dev);
1114                 from_assoc_ap = 1;
1115         }
1116 #endif
1117
1118         dev->last_rx = jiffies;
1119
1120 #ifdef NOT_YET
1121         if ((ieee->iw_mode == IW_MODE_MASTER ||
1122              ieee->iw_mode == IW_MODE_REPEAT) &&
1123             !from_assoc_ap) {
1124                 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
1125                                              wds != NULL)) {
1126                 case AP_RX_CONTINUE_NOT_AUTHORIZED:
1127                         frame_authorized = 0;
1128                         break;
1129                 case AP_RX_CONTINUE:
1130                         frame_authorized = 1;
1131                         break;
1132                 case AP_RX_DROP:
1133                         goto rx_dropped;
1134                 case AP_RX_EXIT:
1135                         goto rx_exit;
1136                 }
1137         }
1138 #endif
1139         //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
1140         /* Nullfunc frames may have PS-bit set, so they must be passed to
1141          * hostap_handle_sta_rx() before being dropped here. */
1142         if (stype != IEEE80211_STYPE_DATA &&
1143             stype != IEEE80211_STYPE_DATA_CFACK &&
1144             stype != IEEE80211_STYPE_DATA_CFPOLL &&
1145             stype != IEEE80211_STYPE_DATA_CFACKPOLL&&
1146             stype != IEEE80211_STYPE_QOS_DATA//add by David,2006.8.4
1147             ) {
1148                 if (stype != IEEE80211_STYPE_NULLFUNC)
1149                         IEEE80211_DEBUG_DROP(
1150                                 "RX: dropped data frame "
1151                                 "with no data (type=0x%02x, "
1152                                 "subtype=0x%02x, len=%d)\n",
1153                                 type, stype, skb->len);
1154                 goto rx_dropped;
1155         }
1156         if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN))
1157                 goto rx_dropped;
1158
1159         /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
1160
1161         if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1162             (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
1163         {
1164                 printk("decrypt frame error\n");
1165                 goto rx_dropped;
1166         }
1167
1168
1169         hdr = (struct ieee80211_hdr_4addr *) skb->data;
1170
1171         /* skb: hdr + (possibly fragmented) plaintext payload */
1172         // PR: FIXME: hostap has additional conditions in the "if" below:
1173         // ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1174         if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) {
1175                 int flen;
1176                 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
1177                 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
1178
1179                 if (!frag_skb) {
1180                         IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
1181                                         "Rx cannot get skb from fragment "
1182                                         "cache (morefrag=%d seq=%u frag=%u)\n",
1183                                         (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
1184                                         WLAN_GET_SEQ_SEQ(sc), frag);
1185                         goto rx_dropped;
1186                 }
1187                 flen = skb->len;
1188                 if (frag != 0)
1189                         flen -= hdrlen;
1190
1191                 if (frag_skb->tail + flen > frag_skb->end) {
1192                         printk(KERN_WARNING "%s: host decrypted and "
1193                                "reassembled frame did not fit skb\n",
1194                                dev->name);
1195                         ieee80211_frag_cache_invalidate(ieee, hdr);
1196                         goto rx_dropped;
1197                 }
1198
1199                 if (frag == 0) {
1200                         /* copy first fragment (including full headers) into
1201                          * beginning of the fragment cache skb */
1202                         memcpy(skb_put(frag_skb, flen), skb->data, flen);
1203                 } else {
1204                         /* append frame payload to the end of the fragment
1205                          * cache skb */
1206                         memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
1207                                flen);
1208                 }
1209                 dev_kfree_skb_any(skb);
1210                 skb = NULL;
1211
1212                 if (fc & IEEE80211_FCTL_MOREFRAGS) {
1213                         /* more fragments expected - leave the skb in fragment
1214                          * cache for now; it will be delivered to upper layers
1215                          * after all fragments have been received */
1216                         goto rx_exit;
1217                 }
1218
1219                 /* this was the last fragment and the frame will be
1220                  * delivered, so remove skb from fragment cache */
1221                 skb = frag_skb;
1222                 hdr = (struct ieee80211_hdr_4addr *) skb->data;
1223                 ieee80211_frag_cache_invalidate(ieee, hdr);
1224         }
1225
1226         /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
1227          * encrypted/authenticated */
1228         if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1229             ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
1230         {
1231                 printk("==>decrypt msdu error\n");
1232                 goto rx_dropped;
1233         }
1234
1235         //added by amy for AP roaming
1236         ieee->LinkDetectInfo.NumRecvDataInPeriod++;
1237         ieee->LinkDetectInfo.NumRxOkInPeriod++;
1238
1239         hdr = (struct ieee80211_hdr_4addr *) skb->data;
1240         if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep) {
1241                 if (/*ieee->ieee802_1x &&*/
1242                     ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1243
1244 #ifdef CONFIG_IEEE80211_DEBUG
1245                         /* pass unencrypted EAPOL frames even if encryption is
1246                          * configured */
1247                         struct eapol *eap = (struct eapol *)(skb->data +
1248                                 24);
1249                         IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1250                                                 eap_get_type(eap->type));
1251 #endif
1252                 } else {
1253                         IEEE80211_DEBUG_DROP(
1254                                 "encryption configured, but RX "
1255                                 "frame not encrypted (SA=%pM)\n",
1256                                 hdr->addr2);
1257                         goto rx_dropped;
1258                 }
1259         }
1260
1261 #ifdef CONFIG_IEEE80211_DEBUG
1262         if (crypt && !(fc & IEEE80211_FCTL_WEP) &&
1263             ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1264                         struct eapol *eap = (struct eapol *)(skb->data +
1265                                 24);
1266                         IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1267                                                 eap_get_type(eap->type));
1268         }
1269 #endif
1270
1271         if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep &&
1272             !ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1273                 IEEE80211_DEBUG_DROP(
1274                         "dropped unencrypted RX data "
1275                         "frame from %pM"
1276                         " (drop_unencrypted=1)\n",
1277                         hdr->addr2);
1278                 goto rx_dropped;
1279         }
1280 /*
1281         if(ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1282                 printk(KERN_WARNING "RX: IEEE802.1X EPAOL frame!\n");
1283         }
1284 */
1285 //added by amy for reorder
1286         if(ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
1287                 && !is_multicast_ether_addr(hdr->addr1))
1288         {
1289                 TID = Frame_QoSTID(skb->data);
1290                 SeqNum = WLAN_GET_SEQ_SEQ(sc);
1291                 GetTs(ieee,(PTS_COMMON_INFO *) &pTS,hdr->addr2,TID,RX_DIR,true);
1292                 if(TID !=0 && TID !=3)
1293                 {
1294                         ieee->bis_any_nonbepkts = true;
1295                 }
1296         }
1297 //added by amy for reorder
1298         /* skb: hdr + (possible reassembled) full plaintext payload */
1299         payload = skb->data + hdrlen;
1300         //ethertype = (payload[6] << 8) | payload[7];
1301         rxb = kmalloc(sizeof(struct ieee80211_rxb), GFP_ATOMIC);
1302         if(rxb == NULL)
1303         {
1304                 IEEE80211_DEBUG(IEEE80211_DL_ERR,"%s(): kmalloc rxb error\n",__FUNCTION__);
1305                 goto rx_dropped;
1306         }
1307         /* to parse amsdu packets */
1308         /* qos data packets & reserved bit is 1 */
1309         if(parse_subframe(skb,rx_stats,rxb,src,dst) == 0) {
1310                 /* only to free rxb, and not submit the packets to upper layer */
1311                 for(i =0; i < rxb->nr_subframes; i++) {
1312                         dev_kfree_skb(rxb->subframes[i]);
1313                 }
1314                 kfree(rxb);
1315                 rxb = NULL;
1316                 goto rx_dropped;
1317         }
1318
1319 //added by amy for reorder
1320         if(ieee->pHTInfo->bCurRxReorderEnable == false ||pTS == NULL){
1321 //added by amy for reorder
1322                 for(i = 0; i<rxb->nr_subframes; i++) {
1323                         struct sk_buff *sub_skb = rxb->subframes[i];
1324
1325                         if (sub_skb) {
1326                                 /* convert hdr + possible LLC headers into Ethernet header */
1327                                 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
1328                                 if (sub_skb->len >= 8 &&
1329                                                 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
1330                                                   ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1331                                                  memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
1332                                         /* remove RFC1042 or Bridge-Tunnel encapsulation and
1333                                          * replace EtherType */
1334                                         skb_pull(sub_skb, SNAP_SIZE);
1335                                         memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1336                                         memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1337                                 } else {
1338                                         u16 len;
1339                                         /* Leave Ethernet header part of hdr and full payload */
1340                                         len = htons(sub_skb->len);
1341                                         memcpy(skb_push(sub_skb, 2), &len, 2);
1342                                         memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1343                                         memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1344                                 }
1345
1346                                 stats->rx_packets++;
1347                                 stats->rx_bytes += sub_skb->len;
1348                                 if(is_multicast_ether_addr(dst)) {
1349                                         stats->multicast++;
1350                                 }
1351
1352                                 /* Indicat the packets to upper layer */
1353                                 //printk("0skb_len(%d)\n", skb->len);
1354                                 sub_skb->protocol = eth_type_trans(sub_skb, dev);
1355                                 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
1356                                 sub_skb->dev = dev;
1357                                 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
1358                                 //skb->ip_summed = CHECKSUM_UNNECESSARY; /* 802.11 crc not sufficient */
1359                                 ieee->last_rx_ps_time = jiffies;
1360                                 //printk("1skb_len(%d)\n", skb->len);
1361                                 netif_rx(sub_skb);
1362                         }
1363                 }
1364                 kfree(rxb);
1365                 rxb = NULL;
1366
1367         }
1368         else
1369         {
1370                 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): REORDER ENABLE AND PTS not NULL, and we will enter RxReorderIndicatePacket()\n",__FUNCTION__);
1371                 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
1372         }
1373 #ifndef JOHN_NOCPY
1374         dev_kfree_skb(skb);
1375 #endif
1376
1377  rx_exit:
1378 #ifdef NOT_YET
1379         if (sta)
1380                 hostap_handle_sta_release(sta);
1381 #endif
1382         return 1;
1383
1384  rx_dropped:
1385         kfree(rxb);
1386         rxb = NULL;
1387         stats->rx_dropped++;
1388
1389         /* Returning 0 indicates to caller that we have not handled the SKB--
1390          * so it is still allocated and can be used again by underlying
1391          * hardware as a DMA target */
1392         return 0;
1393 }
1394
1395 #define MGMT_FRAME_FIXED_PART_LENGTH            0x24
1396
1397 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
1398
1399 /*
1400 * Make the structure we read from the beacon packet to have
1401 * the right values
1402 */
1403 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
1404                                      *info_element, int sub_type)
1405 {
1406
1407         if (info_element->qui_subtype != sub_type)
1408                 return -1;
1409         if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
1410                 return -1;
1411         if (info_element->qui_type != QOS_OUI_TYPE)
1412                 return -1;
1413         if (info_element->version != QOS_VERSION_1)
1414                 return -1;
1415
1416         return 0;
1417 }
1418
1419
1420 /*
1421  * Parse a QoS parameter element
1422  */
1423 static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
1424                                             *element_param, struct ieee80211_info_element
1425                                             *info_element)
1426 {
1427         int ret = 0;
1428         u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2;
1429
1430         if ((info_element == NULL) || (element_param == NULL))
1431                 return -1;
1432
1433         if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
1434                 memcpy(element_param->info_element.qui, info_element->data,
1435                        info_element->len);
1436                 element_param->info_element.elementID = info_element->id;
1437                 element_param->info_element.length = info_element->len;
1438         } else
1439                 ret = -1;
1440         if (ret == 0)
1441                 ret = ieee80211_verify_qos_info(&element_param->info_element,
1442                                                 QOS_OUI_PARAM_SUB_TYPE);
1443         return ret;
1444 }
1445
1446 /*
1447  * Parse a QoS information element
1448  */
1449 static int ieee80211_read_qos_info_element(struct
1450                                            ieee80211_qos_information_element
1451                                            *element_info, struct ieee80211_info_element
1452                                            *info_element)
1453 {
1454         int ret = 0;
1455         u16 size = sizeof(struct ieee80211_qos_information_element) - 2;
1456
1457         if (element_info == NULL)
1458                 return -1;
1459         if (info_element == NULL)
1460                 return -1;
1461
1462         if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
1463                 memcpy(element_info->qui, info_element->data,
1464                        info_element->len);
1465                 element_info->elementID = info_element->id;
1466                 element_info->length = info_element->len;
1467         } else
1468                 ret = -1;
1469
1470         if (ret == 0)
1471                 ret = ieee80211_verify_qos_info(element_info,
1472                                                 QOS_OUI_INFO_SUB_TYPE);
1473         return ret;
1474 }
1475
1476
1477 /*
1478  * Write QoS parameters from the ac parameters.
1479  */
1480 static int ieee80211_qos_convert_ac_to_parameters(struct
1481                                                   ieee80211_qos_parameter_info
1482                                                   *param_elm, struct
1483                                                   ieee80211_qos_parameters
1484                                                   *qos_param)
1485 {
1486         int rc = 0;
1487         int i;
1488         struct ieee80211_qos_ac_parameter *ac_params;
1489         u8 aci;
1490         //u8 cw_min;
1491         //u8 cw_max;
1492
1493         for (i = 0; i < QOS_QUEUE_NUM; i++) {
1494                 ac_params = &(param_elm->ac_params_record[i]);
1495
1496                 aci = (ac_params->aci_aifsn & 0x60) >> 5;
1497
1498                 if(aci >= QOS_QUEUE_NUM)
1499                         continue;
1500                 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
1501
1502                 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
1503                 qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2:qos_param->aifs[aci];
1504
1505                 qos_param->cw_min[aci] = ac_params->ecw_min_max & 0x0F;
1506
1507                 qos_param->cw_max[aci] = (ac_params->ecw_min_max & 0xF0) >> 4;
1508
1509                 qos_param->flag[aci] =
1510                     (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1511                 qos_param->tx_op_limit[aci] = le16_to_cpu(ac_params->tx_op_limit);
1512         }
1513         return rc;
1514 }
1515
1516 /*
1517  * we have a generic data element which it may contain QoS information or
1518  * parameters element. check the information element length to decide
1519  * which type to read
1520  */
1521 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
1522                                              *info_element,
1523                                              struct ieee80211_network *network)
1524 {
1525         int rc = 0;
1526         struct ieee80211_qos_parameters *qos_param = NULL;
1527         struct ieee80211_qos_information_element qos_info_element;
1528
1529         rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);
1530
1531         if (rc == 0) {
1532                 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1533                 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1534         } else {
1535                 struct ieee80211_qos_parameter_info param_element;
1536
1537                 rc = ieee80211_read_qos_param_element(&param_element,
1538                                                       info_element);
1539                 if (rc == 0) {
1540                         qos_param = &(network->qos_data.parameters);
1541                         ieee80211_qos_convert_ac_to_parameters(&param_element,
1542                                                                qos_param);
1543                         network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1544                         network->qos_data.param_count =
1545                             param_element.info_element.ac_info & 0x0F;
1546                 }
1547         }
1548
1549         if (rc == 0) {
1550                 IEEE80211_DEBUG_QOS("QoS is supported\n");
1551                 network->qos_data.supported = 1;
1552         }
1553         return rc;
1554 }
1555
1556 #ifdef CONFIG_IEEE80211_DEBUG
1557 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1558
1559 static const char *get_info_element_string(u16 id)
1560 {
1561         switch (id) {
1562                 MFIE_STRING(SSID);
1563                 MFIE_STRING(RATES);
1564                 MFIE_STRING(FH_SET);
1565                 MFIE_STRING(DS_SET);
1566                 MFIE_STRING(CF_SET);
1567                 MFIE_STRING(TIM);
1568                 MFIE_STRING(IBSS_SET);
1569                 MFIE_STRING(COUNTRY);
1570                 MFIE_STRING(HOP_PARAMS);
1571                 MFIE_STRING(HOP_TABLE);
1572                 MFIE_STRING(REQUEST);
1573                 MFIE_STRING(CHALLENGE);
1574                 MFIE_STRING(POWER_CONSTRAINT);
1575                 MFIE_STRING(POWER_CAPABILITY);
1576                 MFIE_STRING(TPC_REQUEST);
1577                 MFIE_STRING(TPC_REPORT);
1578                 MFIE_STRING(SUPP_CHANNELS);
1579                 MFIE_STRING(CSA);
1580                 MFIE_STRING(MEASURE_REQUEST);
1581                 MFIE_STRING(MEASURE_REPORT);
1582                 MFIE_STRING(QUIET);
1583                 MFIE_STRING(IBSS_DFS);
1584                // MFIE_STRING(ERP_INFO);
1585                 MFIE_STRING(RSN);
1586                 MFIE_STRING(RATES_EX);
1587                 MFIE_STRING(GENERIC);
1588                 MFIE_STRING(QOS_PARAMETER);
1589         default:
1590                 return "UNKNOWN";
1591         }
1592 }
1593 #endif
1594
1595 static inline void ieee80211_extract_country_ie(
1596         struct ieee80211_device *ieee,
1597         struct ieee80211_info_element *info_element,
1598         struct ieee80211_network *network,
1599         u8 *addr2
1600 )
1601 {
1602         if(IS_DOT11D_ENABLE(ieee))
1603         {
1604                 if(info_element->len!= 0)
1605                 {
1606                         memcpy(network->CountryIeBuf, info_element->data, info_element->len);
1607                         network->CountryIeLen = info_element->len;
1608
1609                         if(!IS_COUNTRY_IE_VALID(ieee))
1610                         {
1611                                 Dot11d_UpdateCountryIe(ieee, addr2, info_element->len, info_element->data);
1612                         }
1613                 }
1614
1615                 //
1616                 // 070305, rcnjko: I update country IE watch dog here because
1617                 // some AP (e.g. Cisco 1242) don't include country IE in their
1618                 // probe response frame.
1619                 //
1620                 if(IS_EQUAL_CIE_SRC(ieee, addr2) )
1621                 {
1622                         UPDATE_CIE_WATCHDOG(ieee);
1623                 }
1624         }
1625
1626 }
1627
1628 int ieee80211_parse_info_param(struct ieee80211_device *ieee,
1629                 struct ieee80211_info_element *info_element,
1630                 u16 length,
1631                 struct ieee80211_network *network,
1632                 struct ieee80211_rx_stats *stats)
1633 {
1634         u8 i;
1635         short offset;
1636         u16     tmp_htcap_len=0;
1637         u16     tmp_htinfo_len=0;
1638         u16 ht_realtek_agg_len=0;
1639         u8  ht_realtek_agg_buf[MAX_IE_LEN];
1640 //      u16 broadcom_len = 0;
1641 #ifdef CONFIG_IEEE80211_DEBUG
1642         char rates_str[64];
1643         char *p;
1644 #endif
1645
1646         while (length >= sizeof(*info_element)) {
1647                 if (sizeof(*info_element) + info_element->len > length) {
1648                         IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
1649                                              "info_element->len + 2 > left : "
1650                                              "info_element->len+2=%zd left=%d, id=%d.\n",
1651                                              info_element->len +
1652                                              sizeof(*info_element),
1653                                              length, info_element->id);
1654                         /* We stop processing but don't return an error here
1655                          * because some misbehaviour APs break this rule. ie.
1656                          * Orinoco AP1000. */
1657                         break;
1658                 }
1659
1660                 switch (info_element->id) {
1661                 case MFIE_TYPE_SSID:
1662                         if (ieee80211_is_empty_essid(info_element->data,
1663                                                      info_element->len)) {
1664                                 network->flags |= NETWORK_EMPTY_ESSID;
1665                                 break;
1666                         }
1667
1668                         network->ssid_len = min(info_element->len,
1669                                                 (u8) IW_ESSID_MAX_SIZE);
1670                         memcpy(network->ssid, info_element->data, network->ssid_len);
1671                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
1672                                 memset(network->ssid + network->ssid_len, 0,
1673                                        IW_ESSID_MAX_SIZE - network->ssid_len);
1674
1675                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1676                                              network->ssid, network->ssid_len);
1677                         break;
1678
1679                 case MFIE_TYPE_RATES:
1680 #ifdef CONFIG_IEEE80211_DEBUG
1681                         p = rates_str;
1682 #endif
1683                         network->rates_len = min(info_element->len,
1684                                                  MAX_RATES_LENGTH);
1685                         for (i = 0; i < network->rates_len; i++) {
1686                                 network->rates[i] = info_element->data[i];
1687 #ifdef CONFIG_IEEE80211_DEBUG
1688                                 p += snprintf(p, sizeof(rates_str) -
1689                                               (p - rates_str), "%02X ",
1690                                               network->rates[i]);
1691 #endif
1692                                 if (ieee80211_is_ofdm_rate
1693                                     (info_element->data[i])) {
1694                                         network->flags |= NETWORK_HAS_OFDM;
1695                                         if (info_element->data[i] &
1696                                             IEEE80211_BASIC_RATE_MASK)
1697                                                 network->flags &=
1698                                                     ~NETWORK_HAS_CCK;
1699                                 }
1700                         }
1701
1702                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1703                                              rates_str, network->rates_len);
1704                         break;
1705
1706                 case MFIE_TYPE_RATES_EX:
1707 #ifdef CONFIG_IEEE80211_DEBUG
1708                         p = rates_str;
1709 #endif
1710                         network->rates_ex_len = min(info_element->len,
1711                                                     MAX_RATES_EX_LENGTH);
1712                         for (i = 0; i < network->rates_ex_len; i++) {
1713                                 network->rates_ex[i] = info_element->data[i];
1714 #ifdef CONFIG_IEEE80211_DEBUG
1715                                 p += snprintf(p, sizeof(rates_str) -
1716                                               (p - rates_str), "%02X ",
1717                                               network->rates[i]);
1718 #endif
1719                                 if (ieee80211_is_ofdm_rate
1720                                     (info_element->data[i])) {
1721                                         network->flags |= NETWORK_HAS_OFDM;
1722                                         if (info_element->data[i] &
1723                                             IEEE80211_BASIC_RATE_MASK)
1724                                                 network->flags &=
1725                                                     ~NETWORK_HAS_CCK;
1726                                 }
1727                         }
1728
1729                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1730                                              rates_str, network->rates_ex_len);
1731                         break;
1732
1733                 case MFIE_TYPE_DS_SET:
1734                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1735                                              info_element->data[0]);
1736                         network->channel = info_element->data[0];
1737                         break;
1738
1739                 case MFIE_TYPE_FH_SET:
1740                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1741                         break;
1742
1743                 case MFIE_TYPE_CF_SET:
1744                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1745                         break;
1746
1747                 case MFIE_TYPE_TIM:
1748                         if(info_element->len < 4)
1749                                 break;
1750
1751                         network->tim.tim_count = info_element->data[0];
1752                         network->tim.tim_period = info_element->data[1];
1753
1754                         network->dtim_period = info_element->data[1];
1755                         if(ieee->state != IEEE80211_LINKED)
1756                                 break;
1757
1758                         network->last_dtim_sta_time[0] = stats->mac_time[0];
1759                         network->last_dtim_sta_time[1] = stats->mac_time[1];
1760
1761                         network->dtim_data = IEEE80211_DTIM_VALID;
1762
1763                         if(info_element->data[0] != 0)
1764                                 break;
1765
1766                         if(info_element->data[2] & 1)
1767                                 network->dtim_data |= IEEE80211_DTIM_MBCAST;
1768
1769                         offset = (info_element->data[2] >> 1)*2;
1770
1771                         //printk("offset1:%x aid:%x\n",offset, ieee->assoc_id);
1772
1773                         if(ieee->assoc_id < 8*offset ||
1774                                 ieee->assoc_id > 8*(offset + info_element->len -3))
1775
1776                                 break;
1777
1778                         offset = (ieee->assoc_id / 8) - offset;// + ((aid % 8)? 0 : 1) ;
1779
1780                         if(info_element->data[3+offset] & (1<<(ieee->assoc_id%8)))
1781                                 network->dtim_data |= IEEE80211_DTIM_UCAST;
1782
1783                         //IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
1784                         break;
1785
1786                 case MFIE_TYPE_ERP:
1787                         network->erp_value = info_element->data[0];
1788                         network->flags |= NETWORK_HAS_ERP_VALUE;
1789                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1790                                              network->erp_value);
1791                         break;
1792                 case MFIE_TYPE_IBSS_SET:
1793                         network->atim_window = info_element->data[0];
1794                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1795                                              network->atim_window);
1796                         break;
1797
1798                 case MFIE_TYPE_CHALLENGE:
1799                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1800                         break;
1801
1802                 case MFIE_TYPE_GENERIC:
1803                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1804                                              info_element->len);
1805                         if (!ieee80211_parse_qos_info_param_IE(info_element,
1806                                                                network))
1807                                 break;
1808
1809                         if (info_element->len >= 4 &&
1810                             info_element->data[0] == 0x00 &&
1811                             info_element->data[1] == 0x50 &&
1812                             info_element->data[2] == 0xf2 &&
1813                             info_element->data[3] == 0x01) {
1814                                 network->wpa_ie_len = min(info_element->len + 2,
1815                                                           MAX_WPA_IE_LEN);
1816                                 memcpy(network->wpa_ie, info_element,
1817                                        network->wpa_ie_len);
1818                                 break;
1819                         }
1820
1821 #ifdef THOMAS_TURBO
1822                         if (info_element->len == 7 &&
1823                             info_element->data[0] == 0x00 &&
1824                             info_element->data[1] == 0xe0 &&
1825                             info_element->data[2] == 0x4c &&
1826                             info_element->data[3] == 0x01 &&
1827                             info_element->data[4] == 0x02) {
1828                                 network->Turbo_Enable = 1;
1829                         }
1830 #endif
1831
1832                         //for HTcap and HTinfo parameters
1833                         if(tmp_htcap_len == 0){
1834                                 if(info_element->len >= 4 &&
1835                                    info_element->data[0] == 0x00 &&
1836                                    info_element->data[1] == 0x90 &&
1837                                    info_element->data[2] == 0x4c &&
1838                                    info_element->data[3] == 0x033){
1839
1840                                                 tmp_htcap_len = min(info_element->len,(u8)MAX_IE_LEN);
1841                                                 if(tmp_htcap_len != 0){
1842                                                         network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1843                                                         network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf)?\
1844                                                                 sizeof(network->bssht.bdHTCapBuf):tmp_htcap_len;
1845                                                         memcpy(network->bssht.bdHTCapBuf,info_element->data,network->bssht.bdHTCapLen);
1846                                                 }
1847                                 }
1848                                 if(tmp_htcap_len != 0)
1849                                         network->bssht.bdSupportHT = true;
1850                                 else
1851                                         network->bssht.bdSupportHT = false;
1852                         }
1853
1854
1855                         if(tmp_htinfo_len == 0){
1856                                 if(info_element->len >= 4 &&
1857                                         info_element->data[0] == 0x00 &&
1858                                         info_element->data[1] == 0x90 &&
1859                                         info_element->data[2] == 0x4c &&
1860                                         info_element->data[3] == 0x034){
1861
1862                                                 tmp_htinfo_len = min(info_element->len,(u8)MAX_IE_LEN);
1863                                                 if(tmp_htinfo_len != 0){
1864                                                         network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1865                                                         if(tmp_htinfo_len){
1866                                                                 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf)?\
1867                                                                         sizeof(network->bssht.bdHTInfoBuf):tmp_htinfo_len;
1868                                                                 memcpy(network->bssht.bdHTInfoBuf,info_element->data,network->bssht.bdHTInfoLen);
1869                                                         }
1870
1871                                                 }
1872
1873                                 }
1874                         }
1875
1876                         if(ieee->aggregation){
1877                                 if(network->bssht.bdSupportHT){
1878                                         if(info_element->len >= 4 &&
1879                                                 info_element->data[0] == 0x00 &&
1880                                                 info_element->data[1] == 0xe0 &&
1881                                                 info_element->data[2] == 0x4c &&
1882                                                 info_element->data[3] == 0x02){
1883
1884                                                 ht_realtek_agg_len = min(info_element->len,(u8)MAX_IE_LEN);
1885                                                 memcpy(ht_realtek_agg_buf,info_element->data,info_element->len);
1886
1887                                         }
1888                                         if(ht_realtek_agg_len >= 5){
1889                                                 network->bssht.bdRT2RTAggregation = true;
1890
1891                                                 if((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02))
1892                                                 network->bssht.bdRT2RTLongSlotTime = true;
1893                                         }
1894                                 }
1895
1896                         }
1897
1898                         //if(tmp_htcap_len !=0  ||  tmp_htinfo_len != 0)
1899                         {
1900                                 if((info_element->len >= 3 &&
1901                                          info_element->data[0] == 0x00 &&
1902                                          info_element->data[1] == 0x05 &&
1903                                          info_element->data[2] == 0xb5) ||
1904                                          (info_element->len >= 3 &&
1905                                          info_element->data[0] == 0x00 &&
1906                                          info_element->data[1] == 0x0a &&
1907                                          info_element->data[2] == 0xf7) ||
1908                                          (info_element->len >= 3 &&
1909                                          info_element->data[0] == 0x00 &&
1910                                          info_element->data[1] == 0x10 &&
1911                                          info_element->data[2] == 0x18)){
1912
1913                                                 network->broadcom_cap_exist = true;
1914
1915                                 }
1916                         }
1917                         if(info_element->len >= 3 &&
1918                                 info_element->data[0] == 0x00 &&
1919                                 info_element->data[1] == 0x0c &&
1920                                 info_element->data[2] == 0x43)
1921                         {
1922                                 network->ralink_cap_exist = true;
1923                         }
1924                         else
1925                                 network->ralink_cap_exist = false;
1926                         //added by amy for atheros AP
1927                         if((info_element->len >= 3 &&
1928                                 info_element->data[0] == 0x00 &&
1929                                 info_element->data[1] == 0x03 &&
1930                                 info_element->data[2] == 0x7f) ||
1931                                 (info_element->len >= 3 &&
1932                                 info_element->data[0] == 0x00 &&
1933                                 info_element->data[1] == 0x13 &&
1934                                 info_element->data[2] == 0x74))
1935                         {
1936                                 printk("========>%s(): athros AP is exist\n",__FUNCTION__);
1937                                 network->atheros_cap_exist = true;
1938                         }
1939                         else
1940                                 network->atheros_cap_exist = false;
1941
1942                         if(info_element->len >= 3 &&
1943                                 info_element->data[0] == 0x00 &&
1944                                 info_element->data[1] == 0x40 &&
1945                                 info_element->data[2] == 0x96)
1946                         {
1947                                 network->cisco_cap_exist = true;
1948                         }
1949                         else
1950                                 network->cisco_cap_exist = false;
1951                         //added by amy for LEAP of cisco
1952                         if(info_element->len > 4 &&
1953                                 info_element->data[0] == 0x00 &&
1954                                 info_element->data[1] == 0x40 &&
1955                                 info_element->data[2] == 0x96 &&
1956                                 info_element->data[3] == 0x01)
1957                         {
1958                                 if(info_element->len == 6)
1959                                 {
1960                                         memcpy(network->CcxRmState, &info_element[4], 2);
1961                                         if(network->CcxRmState[0] != 0)
1962                                         {
1963                                                 network->bCcxRmEnable = true;
1964                                         }
1965                                         else
1966                                                 network->bCcxRmEnable = false;
1967                                         //
1968                                         // CCXv4 Table 59-1 MBSSID Masks.
1969                                         //
1970                                         network->MBssidMask = network->CcxRmState[1] & 0x07;
1971                                         if(network->MBssidMask != 0)
1972                                         {
1973                                                 network->bMBssidValid = true;
1974                                                 network->MBssidMask = 0xff << (network->MBssidMask);
1975                                                 cpMacAddr(network->MBssid, network->bssid);
1976                                                 network->MBssid[5] &= network->MBssidMask;
1977                                         }
1978                                         else
1979                                         {
1980                                                 network->bMBssidValid = false;
1981                                         }
1982                                 }
1983                                 else
1984                                 {
1985                                         network->bCcxRmEnable = false;
1986                                 }
1987                         }
1988                         if(info_element->len > 4  &&
1989                                 info_element->data[0] == 0x00 &&
1990                                 info_element->data[1] == 0x40 &&
1991                                 info_element->data[2] == 0x96 &&
1992                                 info_element->data[3] == 0x03)
1993                         {
1994                                 if(info_element->len == 5)
1995                                 {
1996                                         network->bWithCcxVerNum = true;
1997                                         network->BssCcxVerNumber = info_element->data[4];
1998                                 }
1999                                 else
2000                                 {
2001                                         network->bWithCcxVerNum = false;
2002                                         network->BssCcxVerNumber = 0;
2003                                 }
2004                         }
2005                         break;
2006
2007                 case MFIE_TYPE_RSN:
2008                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
2009                                              info_element->len);
2010                         network->rsn_ie_len = min(info_element->len + 2,
2011                                                   MAX_WPA_IE_LEN);
2012                         memcpy(network->rsn_ie, info_element,
2013                                network->rsn_ie_len);
2014                         break;
2015
2016                         //HT related element.
2017                 case MFIE_TYPE_HT_CAP:
2018                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n",
2019                                              info_element->len);
2020                         tmp_htcap_len = min(info_element->len,(u8)MAX_IE_LEN);
2021                         if(tmp_htcap_len != 0){
2022                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
2023                                 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf)?\
2024                                         sizeof(network->bssht.bdHTCapBuf):tmp_htcap_len;
2025                                 memcpy(network->bssht.bdHTCapBuf,info_element->data,network->bssht.bdHTCapLen);
2026
2027                                 //If peer is HT, but not WMM, call QosSetLegacyWMMParamWithHT()
2028                                 // windows driver will update WMM parameters each beacon received once connected
2029                                 // Linux driver is a bit different.
2030                                 network->bssht.bdSupportHT = true;
2031                         }
2032                         else
2033                                 network->bssht.bdSupportHT = false;
2034                         break;
2035
2036
2037                 case MFIE_TYPE_HT_INFO:
2038                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n",
2039                                              info_element->len);
2040                         tmp_htinfo_len = min(info_element->len,(u8)MAX_IE_LEN);
2041                         if(tmp_htinfo_len){
2042                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
2043                                 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf)?\
2044                                         sizeof(network->bssht.bdHTInfoBuf):tmp_htinfo_len;
2045                                 memcpy(network->bssht.bdHTInfoBuf,info_element->data,network->bssht.bdHTInfoLen);
2046                         }
2047                         break;
2048
2049                 case MFIE_TYPE_AIRONET:
2050                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n",
2051                                              info_element->len);
2052                         if(info_element->len >IE_CISCO_FLAG_POSITION)
2053                         {
2054                                 network->bWithAironetIE = true;
2055
2056                                 // CCX 1 spec v1.13, A01.1 CKIP Negotiation (page23):
2057                                 // "A Cisco access point advertises support for CKIP in beacon and probe response packets,
2058                                 //  by adding an Aironet element and setting one or both of the CKIP negotiation bits."
2059                                 if(     (info_element->data[IE_CISCO_FLAG_POSITION]&SUPPORT_CKIP_MIC)   ||
2060                                         (info_element->data[IE_CISCO_FLAG_POSITION]&SUPPORT_CKIP_PK)    )
2061                                 {
2062                                         network->bCkipSupported = true;
2063                                 }
2064                                 else
2065                                 {
2066                                         network->bCkipSupported = false;
2067                                 }
2068                         }
2069                         else
2070                         {
2071                                 network->bWithAironetIE = false;
2072                                 network->bCkipSupported = false;
2073                         }
2074                         break;
2075                 case MFIE_TYPE_QOS_PARAMETER:
2076                         printk(KERN_ERR
2077                                "QoS Error need to parse QOS_PARAMETER IE\n");
2078                         break;
2079
2080                 case MFIE_TYPE_COUNTRY:
2081                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
2082                                              info_element->len);
2083                         //printk("=====>Receive <%s> Country IE\n",network->ssid);
2084                         ieee80211_extract_country_ie(ieee, info_element, network, network->bssid);//addr2 is same as addr3 when from an AP
2085                         break;
2086 /* TODO */
2087                 default:
2088                         IEEE80211_DEBUG_MGMT
2089                             ("Unsupported info element: %s (%d)\n",
2090                              get_info_element_string(info_element->id),
2091                              info_element->id);
2092                         break;
2093                 }
2094
2095                 length -= sizeof(*info_element) + info_element->len;
2096                 info_element =
2097                     (struct ieee80211_info_element *)&info_element->
2098                     data[info_element->len];
2099         }
2100
2101         if(!network->atheros_cap_exist && !network->broadcom_cap_exist &&
2102                 !network->cisco_cap_exist && !network->ralink_cap_exist && !network->bssht.bdRT2RTAggregation)
2103         {
2104                 network->unknown_cap_exist = true;
2105         }
2106         else
2107         {
2108                 network->unknown_cap_exist = false;
2109         }
2110         return 0;
2111 }
2112
2113 static inline u8 ieee80211_SignalStrengthTranslate(
2114         u8  CurrSS
2115         )
2116 {
2117         u8 RetSS;
2118
2119         // Step 1. Scale mapping.
2120         if(CurrSS >= 71 && CurrSS <= 100)
2121         {
2122                 RetSS = 90 + ((CurrSS - 70) / 3);
2123         }
2124         else if(CurrSS >= 41 && CurrSS <= 70)
2125         {
2126                 RetSS = 78 + ((CurrSS - 40) / 3);
2127         }
2128         else if(CurrSS >= 31 && CurrSS <= 40)
2129         {
2130                 RetSS = 66 + (CurrSS - 30);
2131         }
2132         else if(CurrSS >= 21 && CurrSS <= 30)
2133         {
2134                 RetSS = 54 + (CurrSS - 20);
2135         }
2136         else if(CurrSS >= 5 && CurrSS <= 20)
2137         {
2138                 RetSS = 42 + (((CurrSS - 5) * 2) / 3);
2139         }
2140         else if(CurrSS == 4)
2141         {
2142                 RetSS = 36;
2143         }
2144         else if(CurrSS == 3)
2145         {
2146                 RetSS = 27;
2147         }
2148         else if(CurrSS == 2)
2149         {
2150                 RetSS = 18;
2151         }
2152         else if(CurrSS == 1)
2153         {
2154                 RetSS = 9;
2155         }
2156         else
2157         {
2158                 RetSS = CurrSS;
2159         }
2160         //RT_TRACE(COMP_DBG, DBG_LOUD, ("##### After Mapping:  LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
2161
2162         // Step 2. Smoothing.
2163
2164         //RT_TRACE(COMP_DBG, DBG_LOUD, ("$$$$$ After Smoothing:  LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
2165
2166         return RetSS;
2167 }
2168
2169 long ieee80211_translate_todbm(u8 signal_strength_index )// 0-100 index.
2170 {
2171         long    signal_power; // in dBm.
2172
2173         // Translate to dBm (x=0.5y-95).
2174         signal_power = (long)((signal_strength_index + 1) >> 1);
2175         signal_power -= 95;
2176
2177         return signal_power;
2178 }
2179
2180 static inline int ieee80211_network_init(
2181         struct ieee80211_device *ieee,
2182         struct ieee80211_probe_response *beacon,
2183         struct ieee80211_network *network,
2184         struct ieee80211_rx_stats *stats)
2185 {
2186 #ifdef CONFIG_IEEE80211_DEBUG
2187         //char rates_str[64];
2188         //char *p;
2189 #endif
2190
2191         network->qos_data.active = 0;
2192         network->qos_data.supported = 0;
2193         network->qos_data.param_count = 0;
2194         network->qos_data.old_param_count = 0;
2195
2196         /* Pull out fixed field data */
2197         memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
2198         network->capability = le16_to_cpu(beacon->capability);
2199         network->last_scanned = jiffies;
2200         network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
2201         network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
2202         network->beacon_interval = le32_to_cpu(beacon->beacon_interval);
2203         /* Where to pull this? beacon->listen_interval;*/
2204         network->listen_interval = 0x0A;
2205         network->rates_len = network->rates_ex_len = 0;
2206         network->last_associate = 0;
2207         network->ssid_len = 0;
2208         network->flags = 0;
2209         network->atim_window = 0;
2210         network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
2211             0x3 : 0x0;
2212         network->berp_info_valid = false;
2213         network->broadcom_cap_exist = false;
2214         network->ralink_cap_exist = false;
2215         network->atheros_cap_exist = false;
2216         network->cisco_cap_exist = false;
2217         network->unknown_cap_exist = false;
2218 #ifdef THOMAS_TURBO
2219         network->Turbo_Enable = 0;
2220 #endif
2221         network->CountryIeLen = 0;
2222         memset(network->CountryIeBuf, 0, MAX_IE_LEN);
2223 //Initialize HT parameters
2224         //ieee80211_ht_initialize(&network->bssht);
2225         HTInitializeBssDesc(&network->bssht);
2226         if (stats->freq == IEEE80211_52GHZ_BAND) {
2227                 /* for A band (No DS info) */
2228                 network->channel = stats->received_channel;
2229         } else
2230                 network->flags |= NETWORK_HAS_CCK;
2231
2232         network->wpa_ie_len = 0;
2233         network->rsn_ie_len = 0;
2234
2235         if (ieee80211_parse_info_param
2236             (ieee,beacon->info_element, stats->len - sizeof(*beacon), network, stats))
2237                 return 1;
2238
2239         network->mode = 0;
2240         if (stats->freq == IEEE80211_52GHZ_BAND)
2241                 network->mode = IEEE_A;
2242         else {
2243                 if (network->flags & NETWORK_HAS_OFDM)
2244                         network->mode |= IEEE_G;
2245                 if (network->flags & NETWORK_HAS_CCK)
2246                         network->mode |= IEEE_B;
2247         }
2248
2249         if (network->mode == 0) {
2250                 IEEE80211_DEBUG_SCAN("Filtered out '%s (%pM)' "
2251                                      "network.\n",
2252                                      escape_essid(network->ssid,
2253                                                   network->ssid_len),
2254                                      network->bssid);
2255                 return 1;
2256         }
2257
2258         if(network->bssht.bdSupportHT){
2259                 if(network->mode == IEEE_A)
2260                         network->mode = IEEE_N_5G;
2261                 else if(network->mode & (IEEE_G | IEEE_B))
2262                         network->mode = IEEE_N_24G;
2263         }
2264         if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
2265                 network->flags |= NETWORK_EMPTY_ESSID;
2266
2267         stats->signal = 30 + (stats->SignalStrength * 70) / 100;
2268         //stats->signal = ieee80211_SignalStrengthTranslate(stats->signal);
2269         stats->noise = ieee80211_translate_todbm((u8)(100-stats->signal)) -25;
2270
2271         memcpy(&network->stats, stats, sizeof(network->stats));
2272
2273         return 0;
2274 }
2275
2276 static inline int is_same_network(struct ieee80211_network *src,
2277                                   struct ieee80211_network *dst, struct ieee80211_device *ieee)
2278 {
2279         /* A network is only a duplicate if the channel, BSSID, ESSID
2280          * and the capability field (in particular IBSS and BSS) all match.
2281          * We treat all <hidden> with the same BSSID and channel
2282          * as one network */
2283         return //((src->ssid_len == dst->ssid_len) &&
2284                 (((src->ssid_len == dst->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) &&
2285                 (src->channel == dst->channel) &&
2286                 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
2287                 //!memcmp(src->ssid, dst->ssid, src->ssid_len) &&
2288                 (!memcmp(src->ssid, dst->ssid, src->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) &&
2289                 ((src->capability & WLAN_CAPABILITY_IBSS) ==
2290                 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
2291                 ((src->capability & WLAN_CAPABILITY_BSS) ==
2292                 (dst->capability & WLAN_CAPABILITY_BSS)));
2293 }
2294
2295 static inline void update_network(struct ieee80211_network *dst,
2296                                   struct ieee80211_network *src)
2297 {
2298         int qos_active;
2299         u8 old_param;
2300
2301         memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats));
2302         dst->capability = src->capability;
2303         memcpy(dst->rates, src->rates, src->rates_len);
2304         dst->rates_len = src->rates_len;
2305         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
2306         dst->rates_ex_len = src->rates_ex_len;
2307         if(src->ssid_len > 0)
2308         {
2309                 memset(dst->ssid, 0, dst->ssid_len);
2310                 dst->ssid_len = src->ssid_len;
2311                 memcpy(dst->ssid, src->ssid, src->ssid_len);
2312         }
2313         dst->mode = src->mode;
2314         dst->flags = src->flags;
2315         dst->time_stamp[0] = src->time_stamp[0];
2316         dst->time_stamp[1] = src->time_stamp[1];
2317         if (src->flags & NETWORK_HAS_ERP_VALUE)
2318         {
2319                 dst->erp_value = src->erp_value;
2320                 dst->berp_info_valid = src->berp_info_valid = true;
2321         }
2322         dst->beacon_interval = src->beacon_interval;
2323         dst->listen_interval = src->listen_interval;
2324         dst->atim_window = src->atim_window;
2325         dst->dtim_period = src->dtim_period;
2326         dst->dtim_data = src->dtim_data;
2327         dst->last_dtim_sta_time[0] = src->last_dtim_sta_time[0];
2328         dst->last_dtim_sta_time[1] = src->last_dtim_sta_time[1];
2329         memcpy(&dst->tim, &src->tim, sizeof(struct ieee80211_tim_parameters));
2330
2331         dst->bssht.bdSupportHT = src->bssht.bdSupportHT;
2332         dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation;
2333         dst->bssht.bdHTCapLen= src->bssht.bdHTCapLen;
2334         memcpy(dst->bssht.bdHTCapBuf,src->bssht.bdHTCapBuf,src->bssht.bdHTCapLen);
2335         dst->bssht.bdHTInfoLen= src->bssht.bdHTInfoLen;
2336         memcpy(dst->bssht.bdHTInfoBuf,src->bssht.bdHTInfoBuf,src->bssht.bdHTInfoLen);
2337         dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer;
2338         dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime;
2339         dst->broadcom_cap_exist = src->broadcom_cap_exist;
2340         dst->ralink_cap_exist = src->ralink_cap_exist;
2341         dst->atheros_cap_exist = src->atheros_cap_exist;
2342         dst->cisco_cap_exist = src->cisco_cap_exist;
2343         dst->unknown_cap_exist = src->unknown_cap_exist;
2344         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
2345         dst->wpa_ie_len = src->wpa_ie_len;
2346         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
2347         dst->rsn_ie_len = src->rsn_ie_len;
2348
2349         dst->last_scanned = jiffies;
2350         /* qos related parameters */
2351         //qos_active = src->qos_data.active;
2352         qos_active = dst->qos_data.active;
2353         //old_param = dst->qos_data.old_param_count;
2354         old_param = dst->qos_data.param_count;
2355         if(dst->flags & NETWORK_HAS_QOS_MASK)
2356                 memcpy(&dst->qos_data, &src->qos_data,
2357                         sizeof(struct ieee80211_qos_data));
2358         else {
2359                 dst->qos_data.supported = src->qos_data.supported;
2360                 dst->qos_data.param_count = src->qos_data.param_count;
2361         }
2362
2363         if(dst->qos_data.supported == 1) {
2364                 dst->QoS_Enable = 1;
2365                 if(dst->ssid_len)
2366                         IEEE80211_DEBUG_QOS
2367                                 ("QoS the network %s is QoS supported\n",
2368                                 dst->ssid);
2369                 else
2370                         IEEE80211_DEBUG_QOS
2371                                 ("QoS the network is QoS supported\n");
2372         }
2373         dst->qos_data.active = qos_active;
2374         dst->qos_data.old_param_count = old_param;
2375
2376         /* dst->last_associate is not overwritten */
2377         dst->wmm_info = src->wmm_info; //sure to exist in beacon or probe response frame.
2378         if(src->wmm_param[0].ac_aci_acm_aifsn|| \
2379            src->wmm_param[1].ac_aci_acm_aifsn|| \
2380            src->wmm_param[2].ac_aci_acm_aifsn|| \
2381            src->wmm_param[3].ac_aci_acm_aifsn) {
2382           memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
2383         }
2384         //dst->QoS_Enable = src->QoS_Enable;
2385 #ifdef THOMAS_TURBO
2386         dst->Turbo_Enable = src->Turbo_Enable;
2387 #endif
2388
2389         dst->CountryIeLen = src->CountryIeLen;
2390         memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
2391
2392         //added by amy for LEAP
2393         dst->bWithAironetIE = src->bWithAironetIE;
2394         dst->bCkipSupported = src->bCkipSupported;
2395         memcpy(dst->CcxRmState,src->CcxRmState,2);
2396         dst->bCcxRmEnable = src->bCcxRmEnable;
2397         dst->MBssidMask = src->MBssidMask;
2398         dst->bMBssidValid = src->bMBssidValid;
2399         memcpy(dst->MBssid,src->MBssid,6);
2400         dst->bWithCcxVerNum = src->bWithCcxVerNum;
2401         dst->BssCcxVerNumber = src->BssCcxVerNumber;
2402
2403 }
2404
2405 static inline int is_beacon(__le16 fc)
2406 {
2407         return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
2408 }
2409
2410 static inline void ieee80211_process_probe_response(
2411         struct ieee80211_device *ieee,
2412         struct ieee80211_probe_response *beacon,
2413         struct ieee80211_rx_stats *stats)
2414 {
2415         struct ieee80211_network network;
2416         struct ieee80211_network *target;
2417         struct ieee80211_network *oldest = NULL;
2418 #ifdef CONFIG_IEEE80211_DEBUG
2419         struct ieee80211_info_element *info_element = &beacon->info_element[0];
2420 #endif
2421         unsigned long flags;
2422         short renew;
2423         //u8 wmm_info;
2424
2425         memset(&network, 0, sizeof(struct ieee80211_network));
2426         IEEE80211_DEBUG_SCAN(
2427                 "'%s' (%pM): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
2428                 escape_essid(info_element->data, info_element->len),
2429                 beacon->header.addr3,
2430                 (beacon->capability & (1<<0xf)) ? '1' : '0',
2431                 (beacon->capability & (1<<0xe)) ? '1' : '0',
2432                 (beacon->capability & (1<<0xd)) ? '1' : '0',
2433                 (beacon->capability & (1<<0xc)) ? '1' : '0',
2434                 (beacon->capability & (1<<0xb)) ? '1' : '0',
2435                 (beacon->capability & (1<<0xa)) ? '1' : '0',
2436                 (beacon->capability & (1<<0x9)) ? '1' : '0',
2437                 (beacon->capability & (1<<0x8)) ? '1' : '0',
2438                 (beacon->capability & (1<<0x7)) ? '1' : '0',
2439                 (beacon->capability & (1<<0x6)) ? '1' : '0',
2440                 (beacon->capability & (1<<0x5)) ? '1' : '0',
2441                 (beacon->capability & (1<<0x4)) ? '1' : '0',
2442                 (beacon->capability & (1<<0x3)) ? '1' : '0',
2443                 (beacon->capability & (1<<0x2)) ? '1' : '0',
2444                 (beacon->capability & (1<<0x1)) ? '1' : '0',
2445                 (beacon->capability & (1<<0x0)) ? '1' : '0');
2446
2447         if (ieee80211_network_init(ieee, beacon, &network, stats)) {
2448                 IEEE80211_DEBUG_SCAN("Dropped '%s' (%pM) via %s.\n",
2449                                      escape_essid(info_element->data,
2450                                                   info_element->len),
2451                                      beacon->header.addr3,
2452                                      WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2453                                      IEEE80211_STYPE_PROBE_RESP ?
2454                                      "PROBE RESPONSE" : "BEACON");
2455                 return;
2456         }
2457
2458         // For Asus EeePc request,
2459         // (1) if wireless adapter receive get any 802.11d country code in AP beacon,
2460         //         wireless adapter should follow the country code.
2461         // (2)  If there is no any country code in beacon,
2462         //       then wireless adapter should do active scan from ch1~11 and
2463         //       passive scan from ch12~14
2464
2465         if( !IsLegalChannel(ieee, network.channel) )
2466                 return;
2467         if(ieee->bGlobalDomain)
2468         {
2469                 if (WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == IEEE80211_STYPE_PROBE_RESP)
2470                 {
2471                         // Case 1: Country code
2472                         if(IS_COUNTRY_IE_VALID(ieee) )
2473                         {
2474                                 if( !IsLegalChannel(ieee, network.channel) )
2475                                 {
2476                                         printk("GetScanInfo(): For Country code, filter probe response at channel(%d).\n", network.channel);
2477                                         return;
2478                                 }
2479                         }
2480                         // Case 2: No any country code.
2481                         else
2482                         {
2483                                 // Filter over channel ch12~14
2484                                 if(network.channel > 11)
2485                                 {
2486                                         printk("GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n", network.channel);
2487                                         return;
2488                                 }
2489                         }
2490                 }
2491                 else
2492                 {
2493                         // Case 1: Country code
2494                         if(IS_COUNTRY_IE_VALID(ieee) )
2495                         {
2496                                 if( !IsLegalChannel(ieee, network.channel) )
2497                                 {
2498                                         printk("GetScanInfo(): For Country code, filter beacon at channel(%d).\n",network.channel);
2499                                         return;
2500                                 }
2501                         }
2502                         // Case 2: No any country code.
2503                         else
2504                         {
2505                                 // Filter over channel ch12~14
2506                                 if(network.channel > 14)
2507                                 {
2508                                         printk("GetScanInfo(): For Global Domain, filter beacon at channel(%d).\n",network.channel);
2509                                         return;
2510                                 }
2511                         }
2512                 }
2513         }
2514
2515         /* The network parsed correctly -- so now we scan our known networks
2516          * to see if we can find it in our list.
2517          *
2518          * NOTE:  This search is definitely not optimized.  Once its doing
2519          *        the "right thing" we'll optimize it for efficiency if
2520          *        necessary */
2521
2522         /* Search for this entry in the list and update it if it is
2523          * already there. */
2524
2525         spin_lock_irqsave(&ieee->lock, flags);
2526
2527         if(is_same_network(&ieee->current_network, &network, ieee)) {
2528                 update_network(&ieee->current_network, &network);
2529                 if((ieee->current_network.mode == IEEE_N_24G || ieee->current_network.mode == IEEE_G)
2530                 && ieee->current_network.berp_info_valid){
2531                 if(ieee->current_network.erp_value& ERP_UseProtection)
2532                         ieee->current_network.buseprotection = true;
2533                 else
2534                         ieee->current_network.buseprotection = false;
2535                 }
2536                 if(is_beacon(beacon->header.frame_ctl))
2537                 {
2538                         if(ieee->state == IEEE80211_LINKED)
2539                                 ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
2540                 }
2541                 else //hidden AP
2542                         network.flags = (~NETWORK_EMPTY_ESSID & network.flags)|(NETWORK_EMPTY_ESSID & ieee->current_network.flags);
2543         }
2544
2545         list_for_each_entry(target, &ieee->network_list, list) {
2546                 if (is_same_network(target, &network, ieee))
2547                         break;
2548                 if ((oldest == NULL) ||
2549                     (target->last_scanned < oldest->last_scanned))
2550                         oldest = target;
2551         }
2552
2553         /* If we didn't find a match, then get a new network slot to initialize
2554          * with this beacon's information */
2555         if (&target->list == &ieee->network_list) {
2556                 if (list_empty(&ieee->network_free_list)) {
2557                         /* If there are no more slots, expire the oldest */
2558                         list_del(&oldest->list);
2559                         target = oldest;
2560                         IEEE80211_DEBUG_SCAN("Expired '%s' (%pM) from "
2561                                              "network list.\n",
2562                                              escape_essid(target->ssid,
2563                                                           target->ssid_len),
2564                                              target->bssid);
2565                 } else {
2566                         /* Otherwise just pull from the free list */
2567                         target = list_entry(ieee->network_free_list.next,
2568                                             struct ieee80211_network, list);
2569                         list_del(ieee->network_free_list.next);
2570                 }
2571
2572
2573 #ifdef CONFIG_IEEE80211_DEBUG
2574                 IEEE80211_DEBUG_SCAN("Adding '%s' (%pM) via %s.\n",
2575                                      escape_essid(network.ssid,
2576                                                   network.ssid_len),
2577                                      network.bssid,
2578                                      WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2579                                      IEEE80211_STYPE_PROBE_RESP ?
2580                                      "PROBE RESPONSE" : "BEACON");
2581 #endif
2582                 memcpy(target, &network, sizeof(*target));
2583                 list_add_tail(&target->list, &ieee->network_list);
2584                 if(ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
2585                         ieee80211_softmac_new_net(ieee,&network);
2586         } else {
2587                 IEEE80211_DEBUG_SCAN("Updating '%s' (%pM) via %s.\n",
2588                                      escape_essid(target->ssid,
2589                                                   target->ssid_len),
2590                                      target->bssid,
2591                                      WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2592                                      IEEE80211_STYPE_PROBE_RESP ?
2593                                      "PROBE RESPONSE" : "BEACON");
2594
2595                 /* we have an entry and we are going to update it. But this entry may
2596                  * be already expired. In this case we do the same as we found a new
2597                  * net and call the new_net handler
2598                  */
2599                 renew = !time_after(target->last_scanned + ieee->scan_age, jiffies);
2600                 //YJ,add,080819,for hidden ap
2601                 if(is_beacon(beacon->header.frame_ctl) == 0)
2602                         network.flags = (~NETWORK_EMPTY_ESSID & network.flags)|(NETWORK_EMPTY_ESSID & target->flags);
2603                 //if(strncmp(network.ssid, "linksys-c",9) == 0)
2604                 //      printk("====>2 network.ssid=%s FLAG=%d target.ssid=%s FLAG=%d\n", network.ssid, network.flags, target->ssid, target->flags);
2605                 if(((network.flags & NETWORK_EMPTY_ESSID) == NETWORK_EMPTY_ESSID) \
2606                     && (((network.ssid_len > 0) && (strncmp(target->ssid, network.ssid, network.ssid_len)))\
2607                     ||((ieee->current_network.ssid_len == network.ssid_len)&&(strncmp(ieee->current_network.ssid, network.ssid, network.ssid_len) == 0)&&(ieee->state == IEEE80211_NOLINK))))
2608                         renew = 1;
2609                 //YJ,add,080819,for hidden ap,end
2610
2611                 update_network(target, &network);
2612                 if(renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
2613                         ieee80211_softmac_new_net(ieee,&network);
2614         }
2615
2616         spin_unlock_irqrestore(&ieee->lock, flags);
2617         if (is_beacon(beacon->header.frame_ctl)&&is_same_network(&ieee->current_network, &network, ieee)&&\
2618                 (ieee->state == IEEE80211_LINKED)) {
2619                 if(ieee->handle_beacon != NULL) {
2620                         ieee->handle_beacon(ieee->dev,beacon,&ieee->current_network);
2621                 }
2622         }
2623 }
2624
2625 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
2626                       struct ieee80211_hdr_4addr *header,
2627                       struct ieee80211_rx_stats *stats)
2628 {
2629         switch (WLAN_FC_GET_STYPE(header->frame_ctl)) {
2630
2631         case IEEE80211_STYPE_BEACON:
2632                 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
2633                                      WLAN_FC_GET_STYPE(header->frame_ctl));
2634                 IEEE80211_DEBUG_SCAN("Beacon\n");
2635                 ieee80211_process_probe_response(
2636                         ieee, (struct ieee80211_probe_response *)header, stats);
2637                 break;
2638
2639         case IEEE80211_STYPE_PROBE_RESP:
2640                 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
2641                                      WLAN_FC_GET_STYPE(header->frame_ctl));
2642                 IEEE80211_DEBUG_SCAN("Probe response\n");
2643                 ieee80211_process_probe_response(
2644                         ieee, (struct ieee80211_probe_response *)header, stats);
2645                 break;
2646
2647         }
2648 }
2649
2650 EXPORT_SYMBOL(ieee80211_rx_mgt);
2651 EXPORT_SYMBOL(ieee80211_rx);