Pileus Git - ~andy/linux/blob - drivers/staging/rtl8192e/rtllib_rx.c

   1 /*
   2  * Original code based Host AP (software wireless LAN access point) driver
   3  * for Intersil Prism2/2.5/3 - hostap.o module, common routines
   4  *
   5  * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   6  * <jkmaline@cc.hut.fi>
   7  * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
   8  * Copyright (c) 2004, Intel Corporation
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation. See README and COPYING for
  13  * more details.
  14  ******************************************************************************
  15
  16   Few modifications for Realtek's Wi-Fi drivers by
  17   Andrea Merello <andreamrl@tiscali.it>
  18
  19   A special thanks goes to Realtek for their support !
  20
  21 ******************************************************************************/
  22
  23
  24 #include <linux/compiler.h>
  25 #include <linux/errno.h>
  26 #include <linux/if_arp.h>
  27 #include <linux/in6.h>
  28 #include <linux/in.h>
  29 #include <linux/ip.h>
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/netdevice.h>
  33 #include <linux/pci.h>
  34 #include <linux/proc_fs.h>
  35 #include <linux/skbuff.h>
  36 #include <linux/slab.h>
  37 #include <linux/tcp.h>
  38 #include <linux/types.h>
  39 #include <linux/version.h>
  40 #include <linux/wireless.h>
  41 #include <linux/etherdevice.h>
  42 #include <asm/uaccess.h>
  43 #include <linux/ctype.h>
  44
  45 #include "rtllib.h"
  46 #ifdef ENABLE_DOT11D
  47 #include "dot11d.h"
  48 #endif
  49
  50 #if defined CONFIG_CFG_80211
  51 #include <linux/crc32.h>
  52
  53 struct ieee80211_channel *rtllib_get_channel(struct wiphy *wiphy,
  54                                                   int freq)
  55 {
  56         enum ieee80211_band band;
  57         struct ieee80211_supported_band *sband;
  58         int i;
  59
  60         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
  61                 sband = wiphy->bands[band];
  62
  63                 if (!sband)
  64                         continue;
  65
  66                 for (i = 0; i < sband->n_channels; i++) {
  67                         if (sband->channels[i].center_freq == freq)
  68                                 return &sband->channels[i];
  69                 }
  70         }
  71
  72         return NULL;
  73 }
  74
  75 int rtllib_channel_to_frequency(int chan)
  76 {
  77         if (chan < 14)
  78                 return 2407 + chan * 5;
  79
  80         if (chan == 14)
  81                 return 2484;
  82
  83         /* FIXME: 802.11j 17.3.8.3.2 */
  84         return (chan + 1000) * 5;
  85 }
  86
  87 u32 rtllib_parse_elems_crc(u8 *start, size_t len,
  88                                struct ieee802_11_elems *elems,
  89                                u64 filter, u32 crc)
  90 {
  91         size_t left = len;
  92         u8 *pos = start;
  93         bool calc_crc = filter != 0;
  94
  95         memset(elems, 0, sizeof(*elems));
  96         elems->ie_start = start;
  97         elems->total_len = len;
  98
  99         while (left >= 2) {
 100                 u8 id, elen;
 101
 102                 id = *pos++;
 103                 elen = *pos++;
 104                 left -= 2;
 105
 106                 if (elen > left)
 107                         break;
 108
 109                 if (calc_crc && id < 64 && (filter & BIT(id)))
 110                         crc = crc32_be(crc, pos - 2, elen + 2);
 111
 112                 switch (id) {
 113                 case WLAN_EID_SSID:
 114                         elems->ssid = pos;
 115                         elems->ssid_len = elen;
 116                         break;
 117                 case WLAN_EID_SUPP_RATES:
 118                         elems->supp_rates = pos;
 119                         elems->supp_rates_len = elen;
 120                         break;
 121                 case WLAN_EID_FH_PARAMS:
 122                         elems->fh_params = pos;
 123                         elems->fh_params_len = elen;
 124                         break;
 125                 case WLAN_EID_DS_PARAMS:
 126                         elems->ds_params = pos;
 127                         elems->ds_params_len = elen;
 128                         break;
 129                 case WLAN_EID_CF_PARAMS:
 130                         elems->cf_params = pos;
 131                         elems->cf_params_len = elen;
 132                         break;
 133                 case WLAN_EID_TIM:
 134                         if (elen >= sizeof(struct ieee80211_tim_ie)) {
 135                                 elems->tim = (void *)pos;
 136                                 elems->tim_len = elen;
 137                         }
 138                         break;
 139                 case WLAN_EID_IBSS_PARAMS:
 140                         elems->ibss_params = pos;
 141                         elems->ibss_params_len = elen;
 142                         break;
 143                 case WLAN_EID_CHALLENGE:
 144                         elems->challenge = pos;
 145                         elems->challenge_len = elen;
 146                         break;
 147                 case WLAN_EID_VENDOR_SPECIFIC:
 148                         if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
 149                             pos[2] == 0xf2) {
 150                                 /* Microsoft OUI (00:50:F2) */
 151
 152                                 if (calc_crc)
 153                                         crc = crc32_be(crc, pos - 2, elen + 2);
 154
 155                                 if (pos[3] == 1) {
 156                                         /* OUI Type 1 - WPA IE */
 157                                         elems->wpa = pos;
 158                                         elems->wpa_len = elen;
 159                                 } else if (elen >= 5 && pos[3] == 2) {
 160                                         /* OUI Type 2 - WMM IE */
 161                                         if (pos[4] == 0) {
 162                                                 elems->wmm_info = pos;
 163                                                 elems->wmm_info_len = elen;
 164                                         } else if (pos[4] == 1) {
 165                                                 elems->wmm_param = pos;
 166                                                 elems->wmm_param_len = elen;
 167                                         }
 168                                 }
 169                         }
 170                         break;
 171                 case WLAN_EID_RSN:
 172                         elems->rsn = pos;
 173                         elems->rsn_len = elen;
 174                         break;
 175                 case WLAN_EID_ERP_INFO:
 176                         elems->erp_info = pos;
 177                         elems->erp_info_len = elen;
 178                         break;
 179                 case WLAN_EID_EXT_SUPP_RATES:
 180                         elems->ext_supp_rates = pos;
 181                         elems->ext_supp_rates_len = elen;
 182                         break;
 183                 case WLAN_EID_HT_CAPABILITY:
 184                         if (elen >= sizeof(struct ieee80211_ht_cap))
 185                                 elems->ht_cap_elem = (void *)pos;
 186                         break;
 187                 case WLAN_EID_HT_INFORMATION:
 188                         if (elen >= sizeof(struct ieee80211_ht_info))
 189                                 elems->ht_info_elem = (void *)pos;
 190                         break;
 191                 case WLAN_EID_MESH_ID:
 192                         elems->mesh_id = pos;
 193                         elems->mesh_id_len = elen;
 194                         break;
 195                 case WLAN_EID_MESH_CONFIG:
 196                         elems->mesh_config = pos;
 197                         elems->mesh_config_len = elen;
 198                         break;
 199                 case WLAN_EID_PEER_LINK:
 200                         elems->peer_link = pos;
 201                         elems->peer_link_len = elen;
 202                         break;
 203                 case WLAN_EID_PREQ:
 204                         elems->preq = pos;
 205                         elems->preq_len = elen;
 206                         break;
 207                 case WLAN_EID_PREP:
 208                         elems->prep = pos;
 209                         elems->prep_len = elen;
 210                         break;
 211                 case WLAN_EID_PERR:
 212                         elems->perr = pos;
 213                         elems->perr_len = elen;
 214                         break;
 215                 case WLAN_EID_CHANNEL_SWITCH:
 216                         elems->ch_switch_elem = pos;
 217                         elems->ch_switch_elem_len = elen;
 218                         break;
 219                 case WLAN_EID_QUIET:
 220                         if (!elems->quiet_elem) {
 221                                 elems->quiet_elem = pos;
 222                                 elems->quiet_elem_len = elen;
 223                         }
 224                         elems->num_of_quiet_elem++;
 225                         break;
 226                 case WLAN_EID_COUNTRY:
 227                         elems->country_elem = pos;
 228                         elems->country_elem_len = elen;
 229                         break;
 230                 case WLAN_EID_PWR_CONSTRAINT:
 231                         elems->pwr_constr_elem = pos;
 232                         elems->pwr_constr_elem_len = elen;
 233                         break;
 234                 case WLAN_EID_TIMEOUT_INTERVAL:
 235                         elems->timeout_int = pos;
 236                         elems->timeout_int_len = elen;
 237                         break;
 238                 default:
 239                         break;
 240                 }
 241
 242                 left -= elen;
 243                 pos += elen;
 244         }
 245
 246         return crc;
 247 }
 248
 249 void rtllib_parse_elems(u8 *start, size_t len,
 250                             struct ieee802_11_elems *elems)
 251 {
 252         rtllib_parse_elems_crc(start, len, elems, 0, 0);
 253 }
 254
 255 void ieee80211_scan_rx(struct rtllib_device *ieee, struct sk_buff *skb, struct rtllib_rx_stats *rx_status)
 256 {
 257         struct rtllib_hdr_4addr *header = (struct rtllib_hdr_4addr *)skb->data ;
 258         struct ieee80211_mgmt *mgmt;
 259         struct ieee80211_bss *bss;
 260         u8 *elements;
 261         struct ieee80211_channel *channel;
 262         size_t baselen;
 263         int freq;
 264         __le16 fc;
 265         bool presp, beacon = false;
 266         struct ieee802_11_elems elems;
 267         s32 signal = 0;
 268
 269         if (skb->len < 2)
 270                 return;
 271
 272         mgmt = (struct ieee80211_mgmt *) skb->data;
 273         fc = mgmt->frame_control;
 274
 275         if (skb->len < 24)
 276                 return;
 277
 278         presp = (WLAN_FC_GET_STYPE(header->frame_ctl) == RTLLIB_STYPE_PROBE_RESP);
 279         if (presp) {
 280                 /* ignore ProbeResp to foreign address */
 281                 if (memcmp(mgmt->da, ieee->dev->dev_addr, ETH_ALEN))
 282                         return ;;
 283
 284                 presp = true;
 285                 elements = mgmt->u.probe_resp.variable;
 286                 baselen = offsetof(struct ieee80211_mgmt, u.probe_resp.variable);
 287         } else {
 288                 beacon =  (WLAN_FC_GET_STYPE(header->frame_ctl) == RTLLIB_STYPE_BEACON);
 289                 baselen = offsetof(struct ieee80211_mgmt, u.beacon.variable);
 290                 elements = mgmt->u.beacon.variable;
 291         }
 292
 293         if (!presp && !beacon)
 294                 return;
 295
 296         if (baselen > skb->len)
 297                 return;
 298
 299         rtllib_parse_elems(elements, skb->len - baselen, &elems);
 300
 301         if (elems.ds_params && elems.ds_params_len == 1)
 302                 freq = rtllib_channel_to_frequency(elems.ds_params[0]);
 303         else
 304                 return;
 305
 306         channel = rtllib_get_channel(ieee->wdev.wiphy, freq);
 307
 308         if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
 309                 return;
 310
 311                 signal = rx_status->signal * 100;
 312
 313         bss = (void *)cfg80211_inform_bss_frame(ieee->wdev.wiphy, channel,
 314                                                 mgmt, skb->len, signal, GFP_ATOMIC);
 315
 316         return;
 317 }
 318 #endif
 319
 320 static inline void rtllib_monitor_rx(struct rtllib_device *ieee,
 321                                 struct sk_buff *skb,struct rtllib_rx_stats *rx_status,
 322                                 size_t hdr_length)
 323 {
 324         skb->dev = ieee->dev;
 325         skb_reset_mac_header(skb);
 326         skb_pull(skb, hdr_length);
 327         skb->pkt_type = PACKET_OTHERHOST;
 328         skb->protocol = __constant_htons(ETH_P_80211_RAW);
 329         memset(skb->cb, 0, sizeof(skb->cb));
 330         netif_rx(skb);
 331 }
 332
 333 /* Called only as a tasklet (software IRQ) */
 334 static struct rtllib_frag_entry *
 335 rtllib_frag_cache_find(struct rtllib_device *ieee, unsigned int seq,
 336                           unsigned int frag, u8 tid,u8 *src, u8 *dst)
 337 {
 338         struct rtllib_frag_entry *entry;
 339         int i;
 340
 341         for (i = 0; i < RTLLIB_FRAG_CACHE_LEN; i++) {
 342                 entry = &ieee->frag_cache[tid][i];
 343                 if (entry->skb != NULL &&
 344                     time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
 345                         RTLLIB_DEBUG_FRAG(
 346                                 "expiring fragment cache entry "
 347                                 "seq=%u last_frag=%u\n",
 348                                 entry->seq, entry->last_frag);
 349                         dev_kfree_skb_any(entry->skb);
 350                         entry->skb = NULL;
 351                 }
 352
 353                 if (entry->skb != NULL && entry->seq == seq &&
 354                     (entry->last_frag + 1 == frag || frag == -1) &&
 355                     memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
 356                     memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
 357                         return entry;
 358         }
 359
 360         return NULL;
 361 }
 362
 363 /* Called only as a tasklet (software IRQ) */
 364 static struct sk_buff *
 365 rtllib_frag_cache_get(struct rtllib_device *ieee,
 366                          struct rtllib_hdr_4addr *hdr)
 367 {
 368         struct sk_buff *skb = NULL;
 369         u16 fc = le16_to_cpu(hdr->frame_ctl);
 370         u16 sc = le16_to_cpu(hdr->seq_ctl);
 371         unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
 372         unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
 373         struct rtllib_frag_entry *entry;
 374         struct rtllib_hdr_3addrqos *hdr_3addrqos;
 375         struct rtllib_hdr_4addrqos *hdr_4addrqos;
 376         u8 tid;
 377
 378         if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS)&&RTLLIB_QOS_HAS_SEQ(fc)) {
 379           hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
 380           tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 381           tid = UP2AC(tid);
 382           tid ++;
 383         } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
 384           hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
 385           tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 386           tid = UP2AC(tid);
 387           tid ++;
 388         } else {
 389           tid = 0;
 390         }
 391
 392         if (frag == 0) {
 393                 /* Reserve enough space to fit maximum frame length */
 394                 skb = dev_alloc_skb(ieee->dev->mtu +
 395                                     sizeof(struct rtllib_hdr_4addr) +
 396                                     8 /* LLC */ +
 397                                     2 /* alignment */ +
 398                                     8 /* WEP */ +
 399                                     ETH_ALEN /* WDS */ +
 400                                     (RTLLIB_QOS_HAS_SEQ(fc)?2:0) /* QOS Control */);
 401                 if (skb == NULL)
 402                         return NULL;
 403
 404                 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
 405                 ieee->frag_next_idx[tid]++;
 406                 if (ieee->frag_next_idx[tid] >= RTLLIB_FRAG_CACHE_LEN)
 407                         ieee->frag_next_idx[tid] = 0;
 408
 409                 if (entry->skb != NULL)
 410                         dev_kfree_skb_any(entry->skb);
 411
 412                 entry->first_frag_time = jiffies;
 413                 entry->seq = seq;
 414                 entry->last_frag = frag;
 415                 entry->skb = skb;
 416                 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
 417                 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
 418         } else {
 419                 /* received a fragment of a frame for which the head fragment
 420                  * should have already been received */
 421                 entry = rtllib_frag_cache_find(ieee, seq, frag, tid,hdr->addr2,
 422                                                   hdr->addr1);
 423                 if (entry != NULL) {
 424                         entry->last_frag = frag;
 425                         skb = entry->skb;
 426                 }
 427         }
 428
 429         return skb;
 430 }
 431
 432
 433 /* Called only as a tasklet (software IRQ) */
 434 static int rtllib_frag_cache_invalidate(struct rtllib_device *ieee,
 435                                            struct rtllib_hdr_4addr *hdr)
 436 {
 437         u16 fc = le16_to_cpu(hdr->frame_ctl);
 438         u16 sc = le16_to_cpu(hdr->seq_ctl);
 439         unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
 440         struct rtllib_frag_entry *entry;
 441         struct rtllib_hdr_3addrqos *hdr_3addrqos;
 442         struct rtllib_hdr_4addrqos *hdr_4addrqos;
 443         u8 tid;
 444
 445         if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS)&&RTLLIB_QOS_HAS_SEQ(fc)) {
 446           hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
 447           tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 448           tid = UP2AC(tid);
 449           tid ++;
 450         } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
 451           hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
 452           tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 453           tid = UP2AC(tid);
 454           tid ++;
 455         } else {
 456           tid = 0;
 457         }
 458
 459         entry = rtllib_frag_cache_find(ieee, seq, -1, tid,hdr->addr2,
 460                                           hdr->addr1);
 461
 462         if (entry == NULL) {
 463                 RTLLIB_DEBUG_FRAG(
 464                         "could not invalidate fragment cache "
 465                         "entry (seq=%u)\n", seq);
 466                 return -1;
 467         }
 468
 469         entry->skb = NULL;
 470         return 0;
 471 }
 472
 473
 474
 475 /* rtllib_rx_frame_mgtmt
 476  *
 477  * Responsible for handling management control frames
 478  *
 479  * Called by rtllib_rx */
 480 static inline int
 481 rtllib_rx_frame_mgmt(struct rtllib_device *ieee, struct sk_buff *skb,
 482                         struct rtllib_rx_stats *rx_stats, u16 type,
 483                         u16 stype)
 484 {
 485         /* On the struct stats definition there is written that
 486          * this is not mandatory.... but seems that the probe
 487          * response parser uses it
 488          */
 489         struct rtllib_hdr_3addr * hdr = (struct rtllib_hdr_3addr *)skb->data;
 490
 491         rx_stats->len = skb->len;
 492         rtllib_rx_mgt(ieee,skb,rx_stats);
 493         if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN))) {
 494                 dev_kfree_skb_any(skb);
 495                 return 0;
 496         }
 497         rtllib_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
 498
 499         dev_kfree_skb_any(skb);
 500
 501         return 0;
 502
 503 #ifdef NOT_YET
 504         if (ieee->iw_mode == IW_MODE_MASTER) {
 505                 printk(KERN_DEBUG "%s: Master mode not yet suppported.\n",
 506                        ieee->dev->name);
 507                 return 0;
 508 /*
 509   hostap_update_sta_ps(ieee, (struct hostap_rtllib_hdr_4addr *)
 510   skb->data);*/
 511         }
 512
 513         if (ieee->hostapd && type == RTLLIB_TYPE_MGMT) {
 514                 if (stype == WLAN_FC_STYPE_BEACON &&
 515                     ieee->iw_mode == IW_MODE_MASTER) {
 516                         struct sk_buff *skb2;
 517                         /* Process beacon frames also in kernel driver to
 518                          * update STA(AP) table statistics */
 519                         skb2 = skb_clone(skb, GFP_ATOMIC);
 520                         if (skb2)
 521                                 hostap_rx(skb2->dev, skb2, rx_stats);
 522                 }
 523
 524                 /* send management frames to the user space daemon for
 525                  * processing */
 526                 ieee->apdevstats.rx_packets++;
 527                 ieee->apdevstats.rx_bytes += skb->len;
 528                 prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
 529                 return 0;
 530         }
 531
 532             if (ieee->iw_mode == IW_MODE_MASTER) {
 533                 if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
 534                         printk(KERN_DEBUG "%s: unknown management frame "
 535                                "(type=0x%02x, stype=0x%02x) dropped\n",
 536                                skb->dev->name, type, stype);
 537                         return -1;
 538                 }
 539
 540                 hostap_rx(skb->dev, skb, rx_stats);
 541                 return 0;
 542         }
 543
 544         printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame "
 545                "received in non-Host AP mode\n", skb->dev->name);
 546         return -1;
 547 #endif
 548 }
 549
 550 #ifndef CONFIG_CFG_80211
 551 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
 552 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
 553 static unsigned char rfc1042_header[] =
 554 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
 555 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
 556 static unsigned char bridge_tunnel_header[] =
 557 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
 558 /* No encapsulation header if EtherType < 0x600 (=length) */
 559 #endif
 560
 561 /* Called by rtllib_rx_frame_decrypt */
 562 static int rtllib_is_eapol_frame(struct rtllib_device *ieee,
 563                                     struct sk_buff *skb, size_t hdrlen)
 564 {
 565         struct net_device *dev = ieee->dev;
 566         u16 fc, ethertype;
 567         struct rtllib_hdr_4addr *hdr;
 568         u8 *pos;
 569
 570         if (skb->len < 24)
 571                 return 0;
 572
 573         hdr = (struct rtllib_hdr_4addr *) skb->data;
 574         fc = le16_to_cpu(hdr->frame_ctl);
 575
 576         /* check that the frame is unicast frame to us */
 577         if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
 578             RTLLIB_FCTL_TODS &&
 579             memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
 580             memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
 581                 /* ToDS frame with own addr BSSID and DA */
 582         } else if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
 583                    RTLLIB_FCTL_FROMDS &&
 584                    memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
 585                 /* FromDS frame with own addr as DA */
 586         } else
 587                 return 0;
 588
 589         if (skb->len < 24 + 8)
 590                 return 0;
 591
 592         /* check for port access entity Ethernet type */
 593         pos = skb->data + hdrlen;
 594         ethertype = (pos[6] << 8) | pos[7];
 595         if (ethertype == ETH_P_PAE)
 596                 return 1;
 597
 598         return 0;
 599 }
 600
 601 /* Called only as a tasklet (software IRQ), by rtllib_rx */
 602 static inline int
 603 rtllib_rx_frame_decrypt(struct rtllib_device* ieee, struct sk_buff *skb,
 604                            struct rtllib_crypt_data *crypt)
 605 {
 606         struct rtllib_hdr_4addr *hdr;
 607         int res, hdrlen;
 608
 609         if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
 610                 return 0;
 611
 612         if (ieee->hwsec_active)
 613         {
 614                 cb_desc *tcb_desc = (cb_desc *)(skb->cb+ MAX_DEV_ADDR_SIZE);
 615                 tcb_desc->bHwSec = 1;
 616
 617                 if (ieee->need_sw_enc)
 618                         tcb_desc->bHwSec = 0;
 619         }
 620
 621         hdr = (struct rtllib_hdr_4addr *) skb->data;
 622         hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 623
 624 #ifdef CONFIG_RTLLIB_CRYPT_TKIP
 625         if (ieee->tkip_countermeasures &&
 626             strcmp(crypt->ops->name, "TKIP") == 0) {
 627                 if (net_ratelimit()) {
 628                         printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
 629                                "received packet from " MAC_FMT "\n",
 630                                ieee->dev->name, MAC_ARG(hdr->addr2));
 631                 }
 632                 return -1;
 633         }
 634 #endif
 635
 636         atomic_inc(&crypt->refcnt);
 637         res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
 638         atomic_dec(&crypt->refcnt);
 639         if (res < 0) {
 640                 RTLLIB_DEBUG_DROP(
 641                         "decryption failed (SA=" MAC_FMT
 642                         ") res=%d\n", MAC_ARG(hdr->addr2), res);
 643                 if (res == -2)
 644                         RTLLIB_DEBUG_DROP("Decryption failed ICV "
 645                                              "mismatch (key %d)\n",
 646                                              skb->data[hdrlen + 3] >> 6);
 647                 ieee->ieee_stats.rx_discards_undecryptable++;
 648                 return -1;
 649         }
 650
 651         return res;
 652 }
 653
 654
 655 /* Called only as a tasklet (software IRQ), by rtllib_rx */
 656 static inline int
 657 rtllib_rx_frame_decrypt_msdu(struct rtllib_device* ieee, struct sk_buff *skb,
 658                              int keyidx, struct rtllib_crypt_data *crypt)
 659 {
 660         struct rtllib_hdr_4addr *hdr;
 661         int res, hdrlen;
 662
 663         if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
 664                 return 0;
 665         if (ieee->hwsec_active)
 666         {
 667                 cb_desc *tcb_desc = (cb_desc *)(skb->cb+ MAX_DEV_ADDR_SIZE);
 668                 tcb_desc->bHwSec = 1;
 669
 670                 if (ieee->need_sw_enc)
 671                         tcb_desc->bHwSec = 0;
 672         }
 673
 674         hdr = (struct rtllib_hdr_4addr *) skb->data;
 675         hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 676
 677         atomic_inc(&crypt->refcnt);
 678         res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv,ieee);
 679         atomic_dec(&crypt->refcnt);
 680         if (res < 0) {
 681                 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
 682                        " (SA=" MAC_FMT " keyidx=%d)\n",
 683                        ieee->dev->name, MAC_ARG(hdr->addr2), keyidx);
 684                 return -1;
 685         }
 686
 687         return 0;
 688 }
 689
 690
 691 /* this function is stolen from ipw2200 driver*/
 692 #define IEEE_PACKET_RETRY_TIME (5*HZ)
 693 static int is_duplicate_packet(struct rtllib_device *ieee,
 694                                       struct rtllib_hdr_4addr *header)
 695 {
 696         u16 fc = le16_to_cpu(header->frame_ctl);
 697         u16 sc = le16_to_cpu(header->seq_ctl);
 698         u16 seq = WLAN_GET_SEQ_SEQ(sc);
 699         u16 frag = WLAN_GET_SEQ_FRAG(sc);
 700         u16 *last_seq, *last_frag;
 701         unsigned long *last_time;
 702         struct rtllib_hdr_3addrqos *hdr_3addrqos;
 703         struct rtllib_hdr_4addrqos *hdr_4addrqos;
 704         u8 tid;
 705
 706         if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS)&&RTLLIB_QOS_HAS_SEQ(fc)) {
 707           hdr_4addrqos = (struct rtllib_hdr_4addrqos *)header;
 708           tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 709           tid = UP2AC(tid);
 710           tid ++;
 711         } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
 712           hdr_3addrqos = (struct rtllib_hdr_3addrqos*)header;
 713           tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 714           tid = UP2AC(tid);
 715           tid ++;
 716         } else {
 717           tid = 0;
 718         }
 719
 720         switch (ieee->iw_mode) {
 721         case IW_MODE_ADHOC:
 722         {
 723                 struct list_head *p;
 724                 struct ieee_ibss_seq *entry = NULL;
 725                 u8 *mac = header->addr2;
 726                 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
 727                 list_for_each(p, &ieee->ibss_mac_hash[index]) {
 728                         entry = list_entry(p, struct ieee_ibss_seq, list);
 729                         if (!memcmp(entry->mac, mac, ETH_ALEN))
 730                                 break;
 731                 }
 732                 if (p == &ieee->ibss_mac_hash[index]) {
 733                         entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC);
 734                         if (!entry) {
 735                                 printk(KERN_WARNING "Cannot malloc new mac entry\n");
 736                                 return 0;
 737                         }
 738                         memcpy(entry->mac, mac, ETH_ALEN);
 739                         entry->seq_num[tid] = seq;
 740                         entry->frag_num[tid] = frag;
 741                         entry->packet_time[tid] = jiffies;
 742                         list_add(&entry->list, &ieee->ibss_mac_hash[index]);
 743                         return 0;
 744                 }
 745                 last_seq = &entry->seq_num[tid];
 746                 last_frag = &entry->frag_num[tid];
 747                 last_time = &entry->packet_time[tid];
 748                 break;
 749         }
 750
 751         case IW_MODE_INFRA:
 752                 last_seq = &ieee->last_rxseq_num[tid];
 753                 last_frag = &ieee->last_rxfrag_num[tid];
 754                 last_time = &ieee->last_packet_time[tid];
 755                 break;
 756         default:
 757                 return 0;
 758         }
 759
 760         if ((*last_seq == seq) &&
 761             time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
 762                 if (*last_frag == frag){
 763                         goto drop;
 764
 765                 }
 766                 if (*last_frag + 1 != frag)
 767                         /* out-of-order fragment */
 768                         goto drop;
 769         } else
 770                 *last_seq = seq;
 771
 772         *last_frag = frag;
 773         *last_time = jiffies;
 774         return 0;
 775
 776 drop:
 777
 778         return 1;
 779 }
 780 bool
 781 AddReorderEntry(
 782         PRX_TS_RECORD                   pTS,
 783         PRX_REORDER_ENTRY               pReorderEntry
 784         )
 785 {
 786         struct list_head *pList = &pTS->RxPendingPktList;
 787
 788         while(pList->next != &pTS->RxPendingPktList)
 789         {
 790                 if ( SN_LESS(pReorderEntry->SeqNum, ((PRX_REORDER_ENTRY)list_entry(pList->next,RX_REORDER_ENTRY,List))->SeqNum) )
 791                 {
 792                         pList = pList->next;
 793                 }
 794                 else if ( SN_EQUAL(pReorderEntry->SeqNum, ((PRX_REORDER_ENTRY)list_entry(pList->next,RX_REORDER_ENTRY,List))->SeqNum) )
 795                 {
 796                         return false;
 797                 }
 798                 else
 799                 {
 800                         break;
 801                 }
 802         }
 803         pReorderEntry->List.next = pList->next;
 804         pReorderEntry->List.next->prev = &pReorderEntry->List;
 805         pReorderEntry->List.prev = pList;
 806         pList->next = &pReorderEntry->List;
 807
 808         return true;
 809 }
 810
 811 void rtllib_indicate_packets(struct rtllib_device *ieee, struct rtllib_rxb** prxbIndicateArray,u8  index)
 812 {
 813         struct net_device_stats *stats = &ieee->stats;
 814         u8 i = 0 , j=0;
 815         u16 ethertype;
 816         for (j = 0; j < index; j++) {
 817                 struct rtllib_rxb* prxb = prxbIndicateArray[j];
 818                 for (i = 0; i<prxb->nr_subframes; i++) {
 819                         struct sk_buff *sub_skb = prxb->subframes[i];
 820
 821                 /* convert hdr + possible LLC headers into Ethernet header */
 822                         ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
 823                         if (sub_skb->len >= 8 &&
 824                                 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
 825                                   ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
 826                                  memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
 827                         /* remove RFC1042 or Bridge-Tunnel encapsulation and
 828                          * replace EtherType */
 829                                 skb_pull(sub_skb, SNAP_SIZE);
 830                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
 831                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
 832                         } else {
 833                                 u16 len;
 834                         /* Leave Ethernet header part of hdr and full payload */
 835                                 len = htons(sub_skb->len);
 836                                 memcpy(skb_push(sub_skb, 2), &len, 2);
 837                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
 838                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
 839                         }
 840
 841                 /* Indicat the packets to upper layer */
 842                         if (sub_skb) {
 843                                 stats->rx_packets++;
 844                                 stats->rx_bytes += sub_skb->len;
 845
 846                                 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
 847                                 sub_skb->protocol = eth_type_trans(sub_skb, ieee->dev);
 848                                 sub_skb->dev = ieee->dev;
 849                                 sub_skb->dev->stats.rx_packets++;
 850                                 sub_skb->dev->stats.rx_bytes += sub_skb->len;
 851 #ifdef TCP_CSUM_OFFLOAD_RX
 852                                 if ( prxb->tcp_csum_valid)
 853                                         sub_skb->ip_summed = CHECKSUM_UNNECESSARY;
 854                                 else
 855                                         sub_skb->ip_summed = CHECKSUM_NONE;
 856
 857 #else
 858                                 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
 859 #endif
 860                                 ieee->last_rx_ps_time = jiffies;
 861                                 netif_rx(sub_skb);
 862                         }
 863                 }
 864                 kfree(prxb);
 865                 prxb = NULL;
 866         }
 867 }
 868
 869 void
 870 rtllib_FlushRxTsPendingPkts(struct rtllib_device *ieee, PRX_TS_RECORD pTS)
 871 {
 872         PRX_REORDER_ENTRY       pRxReorderEntry;
 873         struct rtllib_rxb*              RfdArray[REORDER_WIN_SIZE];
 874         u8                                      RfdCnt = 0;
 875
 876
 877         del_timer_sync(&pTS->RxPktPendingTimer);
 878         while(!list_empty(&pTS->RxPendingPktList))
 879         {
 880                 if (RfdCnt >= REORDER_WIN_SIZE){
 881                         printk("-------------->%s() error! RfdCnt >= REORDER_WIN_SIZE\n", __func__);
 882                         break;
 883                 }
 884
 885                 pRxReorderEntry = (PRX_REORDER_ENTRY)list_entry(pTS->RxPendingPktList.prev,RX_REORDER_ENTRY,List);
 886                 RTLLIB_DEBUG(RTLLIB_DL_REORDER,"%s(): Indicate SeqNum %d!\n",__func__, pRxReorderEntry->SeqNum);
 887                 list_del_init(&pRxReorderEntry->List);
 888
 889                 RfdArray[RfdCnt] = pRxReorderEntry->prxb;
 890
 891                 RfdCnt = RfdCnt + 1;
 892                 list_add_tail(&pRxReorderEntry->List, &ieee->RxReorder_Unused_List);
 893         }
 894         rtllib_indicate_packets(ieee, RfdArray, RfdCnt);
 895
 896         pTS->RxIndicateSeq = 0xffff;
 897 }
 898
 899
 900 void RxReorderIndicatePacket( struct rtllib_device *ieee,
 901                 struct rtllib_rxb* prxb,
 902                 PRX_TS_RECORD           pTS,
 903                 u16                     SeqNum)
 904 {
 905         PRT_HIGH_THROUGHPUT     pHTInfo = ieee->pHTInfo;
 906         PRX_REORDER_ENTRY       pReorderEntry = NULL;
 907         struct rtllib_rxb* prxbIndicateArray[REORDER_WIN_SIZE];
 908         u8                      WinSize = pHTInfo->RxReorderWinSize;
 909         u16                     WinEnd = 0;
 910         u8                      index = 0;
 911         bool                    bMatchWinStart = false, bPktInBuf = false;
 912         unsigned long flags;
 913
 914         RTLLIB_DEBUG(RTLLIB_DL_REORDER,"%s(): Seq is %d,pTS->RxIndicateSeq is %d, WinSize is %d\n",__func__,SeqNum,pTS->RxIndicateSeq,WinSize);
 915
 916         spin_lock_irqsave(&(ieee->reorder_spinlock), flags);
 917
 918         WinEnd = (pTS->RxIndicateSeq + WinSize -1)%4096;
 919         /* Rx Reorder initialize condition.*/
 920         if (pTS->RxIndicateSeq == 0xffff) {
 921                 pTS->RxIndicateSeq = SeqNum;
 922         }
 923
 924         /* Drop out the packet which SeqNum is smaller than WinStart */
 925         if (SN_LESS(SeqNum, pTS->RxIndicateSeq)) {
 926                 RTLLIB_DEBUG(RTLLIB_DL_REORDER,"Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
 927                                  pTS->RxIndicateSeq, SeqNum);
 928                 pHTInfo->RxReorderDropCounter++;
 929                 {
 930                         int i;
 931                         for (i =0; i < prxb->nr_subframes; i++) {
 932                                 dev_kfree_skb(prxb->subframes[i]);
 933                         }
 934                         kfree(prxb);
 935                         prxb = NULL;
 936                 }
 937                 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
 938                 return;
 939         }
 940
 941         /*
 942          * Sliding window manipulation. Conditions includes:
 943          * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
 944          * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
 945          */
 946         if (SN_EQUAL(SeqNum, pTS->RxIndicateSeq)) {
 947                 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
 948                 bMatchWinStart = true;
 949         } else if (SN_LESS(WinEnd, SeqNum)) {
 950                 if (SeqNum >= (WinSize - 1)) {
 951                         pTS->RxIndicateSeq = SeqNum + 1 -WinSize;
 952                 } else {
 953                         pTS->RxIndicateSeq = 4095 - (WinSize - (SeqNum +1)) + 1;
 954                 }
 955                 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Window Shift! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum);
 956         }
 957
 958         /*
 959          * Indication process.
 960          * After Packet dropping and Sliding Window shifting as above, we can now just indicate the packets
 961          * with the SeqNum smaller than latest WinStart and buffer other packets.
 962          */
 963         /* For Rx Reorder condition:
 964          * 1. All packets with SeqNum smaller than WinStart => Indicate
 965          * 2. All packets with SeqNum larger than or equal to WinStart => Buffer it.
 966          */
 967         if (bMatchWinStart) {
 968                 /* Current packet is going to be indicated.*/
 969                 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Packets indication!! IndicateSeq: %d, NewSeq: %d\n",\
 970                                 pTS->RxIndicateSeq, SeqNum);
 971                 prxbIndicateArray[0] = prxb;
 972                 index = 1;
 973         } else {
 974                 /* Current packet is going to be inserted into pending list.*/
 975                 if (!list_empty(&ieee->RxReorder_Unused_List)) {
 976                         pReorderEntry = (PRX_REORDER_ENTRY)list_entry(ieee->RxReorder_Unused_List.next,RX_REORDER_ENTRY,List);
 977                         list_del_init(&pReorderEntry->List);
 978
 979                         /* Make a reorder entry and insert into a the packet list.*/
 980                         pReorderEntry->SeqNum = SeqNum;
 981                         pReorderEntry->prxb = prxb;
 982
 983                         if (!AddReorderEntry(pTS, pReorderEntry)) {
 984                                 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): Duplicate packet is dropped!! IndicateSeq: %d, NewSeq: %d\n",
 985                                         __func__, pTS->RxIndicateSeq, SeqNum);
 986                                 list_add_tail(&pReorderEntry->List,&ieee->RxReorder_Unused_List);
 987                                 {
 988                                         int i;
 989                                         for (i =0; i < prxb->nr_subframes; i++) {
 990                                                 dev_kfree_skb(prxb->subframes[i]);
 991                                         }
 992                                         kfree(prxb);
 993                                         prxb = NULL;
 994                                 }
 995                         } else {
 996                                 RTLLIB_DEBUG(RTLLIB_DL_REORDER,
 997                                          "Pkt insert into buffer!! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum);
 998                         }
 999                 }
1000                 else {
1001                         /*
1002                          * Packets are dropped if there is not enough reorder entries.
1003                          * This part shall be modified!! We can just indicate all the
1004                          * packets in buffer and get reorder entries.
1005                          */
1006                         RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket(): There is no reorder entry!! Packet is dropped!!\n");
1007                         {
1008                                 int i;
1009                                 for (i =0; i < prxb->nr_subframes; i++) {
1010                                         dev_kfree_skb(prxb->subframes[i]);
1011                                 }
1012                                 kfree(prxb);
1013                                 prxb = NULL;
1014                         }
1015                 }
1016         }
1017
1018         /* Check if there is any packet need indicate.*/
1019         while(!list_empty(&pTS->RxPendingPktList)) {
1020                 RTLLIB_DEBUG(RTLLIB_DL_REORDER,"%s(): start RREORDER indicate\n",__func__);
1021
1022                 pReorderEntry = (PRX_REORDER_ENTRY)list_entry(pTS->RxPendingPktList.prev,RX_REORDER_ENTRY,List);
1023                 if ( SN_LESS(pReorderEntry->SeqNum, pTS->RxIndicateSeq) ||
1024                                 SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
1025                 {
1026                         /* This protect buffer from overflow. */
1027                         if (index >= REORDER_WIN_SIZE) {
1028                                 RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket(): Buffer overflow!! \n");
1029                                 bPktInBuf = true;
1030                                 break;
1031                         }
1032
1033                         list_del_init(&pReorderEntry->List);
1034
1035                         if (SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
1036                                 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
1037
1038                         prxbIndicateArray[index] = pReorderEntry->prxb;
1039                         RTLLIB_DEBUG(RTLLIB_DL_REORDER,"%s(): Indicate SeqNum %d!\n",__func__, pReorderEntry->SeqNum);
1040                         index++;
1041
1042                         list_add_tail(&pReorderEntry->List,&ieee->RxReorder_Unused_List);
1043                 } else {
1044                         bPktInBuf = true;
1045                         break;
1046                 }
1047         }
1048
1049         /* Handling pending timer. Set this timer to prevent from long time Rx buffering.*/
1050         if (index>0) {
1051                 if (timer_pending(&pTS->RxPktPendingTimer)){
1052                         del_timer_sync(&pTS->RxPktPendingTimer);
1053                 }
1054                 pTS->RxTimeoutIndicateSeq = 0xffff;
1055
1056                 if (index>REORDER_WIN_SIZE){
1057                         RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket(): Rx Reorer buffer full!! \n");
1058                         spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
1059                         return;
1060                 }
1061                 rtllib_indicate_packets(ieee, prxbIndicateArray, index);
1062                 bPktInBuf = false;
1063         }
1064
1065         if (bPktInBuf && pTS->RxTimeoutIndicateSeq==0xffff) {
1066                 RTLLIB_DEBUG(RTLLIB_DL_REORDER,"%s(): SET rx timeout timer\n", __func__);
1067                 pTS->RxTimeoutIndicateSeq = pTS->RxIndicateSeq;
1068                 mod_timer(&pTS->RxPktPendingTimer,  jiffies + MSECS(pHTInfo->RxReorderPendingTime));
1069         }
1070         spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
1071 }
1072
1073 u8 parse_subframe(struct rtllib_device* ieee,struct sk_buff *skb,
1074                   struct rtllib_rx_stats *rx_stats,
1075                   struct rtllib_rxb *rxb,u8* src,u8* dst)
1076 {
1077         struct rtllib_hdr_3addr  *hdr = (struct rtllib_hdr_3addr* )skb->data;
1078         u16             fc = le16_to_cpu(hdr->frame_ctl);
1079
1080         u16             LLCOffset= sizeof(struct rtllib_hdr_3addr);
1081         u16             ChkLength;
1082         bool            bIsAggregateFrame = false;
1083         u16             nSubframe_Length;
1084         u8              nPadding_Length = 0;
1085         u16             SeqNum=0;
1086         struct sk_buff *sub_skb;
1087         u8             *data_ptr;
1088         /* just for debug purpose */
1089         SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl));
1090         if ((RTLLIB_QOS_HAS_SEQ(fc))&&\
1091                         (((frameqos *)(skb->data + RTLLIB_3ADDR_LEN))->field.reserved)) {
1092                 bIsAggregateFrame = true;
1093         }
1094
1095         if (RTLLIB_QOS_HAS_SEQ(fc)) {
1096                 LLCOffset += 2;
1097         }
1098         if (rx_stats->bContainHTC) {
1099                 LLCOffset += sHTCLng;
1100         }
1101
1102         ChkLength = LLCOffset;/* + (Frame_WEP(frame)!=0 ?Adapter->MgntInfo.SecurityInfo.EncryptionHeadOverhead:0);*/
1103
1104         if ( skb->len <= ChkLength ) {
1105                 return 0;
1106         }
1107
1108         skb_pull(skb, LLCOffset);
1109         ieee->bIsAggregateFrame = bIsAggregateFrame;
1110         if (!bIsAggregateFrame) {
1111                 rxb->nr_subframes = 1;
1112
1113                 /* altered by clark 3/30/2010
1114                  * The buffer size of the skb indicated to upper layer
1115                  * must be less than 5000, or the defraged IP datagram
1116                  * in the IP layer will exceed "ipfrag_high_tresh" and be
1117                  * discarded. so there must not use the function
1118                  * "skb_copy" and "skb_clone" for "skb".
1119                  */
1120
1121                 /* Allocate new skb for releasing to upper layer */
1122                 sub_skb = dev_alloc_skb(RTLLIB_SKBBUFFER_SIZE);
1123                 skb_reserve(sub_skb, 12);
1124                 data_ptr = (u8 *)skb_put(sub_skb, skb->len);
1125                 memcpy(data_ptr, skb->data, skb->len);
1126                 sub_skb->dev = ieee->dev;
1127
1128                 rxb->subframes[0] = sub_skb;
1129
1130                 memcpy(rxb->src,src,ETH_ALEN);
1131                 memcpy(rxb->dst,dst,ETH_ALEN);
1132                 rxb->subframes[0]->dev = ieee->dev;
1133                 return 1;
1134         } else {
1135                 rxb->nr_subframes = 0;
1136                 memcpy(rxb->src,src,ETH_ALEN);
1137                 memcpy(rxb->dst,dst,ETH_ALEN);
1138                 while(skb->len > ETHERNET_HEADER_SIZE) {
1139                         /* Offset 12 denote 2 mac address */
1140                         nSubframe_Length = *((u16*)(skb->data + 12));
1141                         nSubframe_Length = (nSubframe_Length>>8) + (nSubframe_Length<<8);
1142
1143                         if (skb->len<(ETHERNET_HEADER_SIZE + nSubframe_Length)) {
1144                                 printk("%s: A-MSDU parse error!! pRfd->nTotalSubframe : %d\n",\
1145                                                 __func__,rxb->nr_subframes);
1146                                 printk("%s: A-MSDU parse error!! Subframe Length: %d\n",__func__, nSubframe_Length);
1147                                 printk("nRemain_Length is %d and nSubframe_Length is : %d\n",skb->len,nSubframe_Length);
1148                                 printk("The Packet SeqNum is %d\n",SeqNum);
1149                                 return 0;
1150                         }
1151
1152                         /* move the data point to data content */
1153                         skb_pull(skb, ETHERNET_HEADER_SIZE);
1154
1155                         /* altered by clark 3/30/2010
1156                          * The buffer size of the skb indicated to upper layer
1157                          * must be less than 5000, or the defraged IP datagram
1158                          * in the IP layer will exceed "ipfrag_high_tresh" and be
1159                          * discarded. so there must not use the function
1160                          * "skb_copy" and "skb_clone" for "skb".
1161                          */
1162
1163                         /* Allocate new skb for releasing to upper layer */
1164                         sub_skb = dev_alloc_skb(nSubframe_Length + 12);
1165                         skb_reserve(sub_skb, 12);
1166                         data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
1167                         memcpy(data_ptr,skb->data,nSubframe_Length);
1168
1169                         sub_skb->dev = ieee->dev;
1170                         rxb->subframes[rxb->nr_subframes++] = sub_skb;
1171                         if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
1172                                 RTLLIB_DEBUG_RX("ParseSubframe(): Too many Subframes! Packets dropped!\n");
1173                                 break;
1174                         }
1175                         skb_pull(skb,nSubframe_Length);
1176
1177                         if (skb->len != 0) {
1178                                 nPadding_Length = 4 - ((nSubframe_Length + ETHERNET_HEADER_SIZE) % 4);
1179                                 if (nPadding_Length == 4) {
1180                                         nPadding_Length = 0;
1181                                 }
1182
1183                                 if (skb->len < nPadding_Length) {
1184                                         return 0;
1185                                 }
1186
1187                                 skb_pull(skb,nPadding_Length);
1188                         }
1189                 }
1190
1191                 return rxb->nr_subframes;
1192         }
1193 }
1194
1195
1196 size_t rtllib_rx_get_hdrlen(struct rtllib_device *ieee, struct sk_buff *skb,
1197                  struct rtllib_rx_stats *rx_stats)
1198 {
1199         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1200         u16 fc = le16_to_cpu(hdr->frame_ctl);
1201         size_t hdrlen = 0;
1202
1203         hdrlen = rtllib_get_hdrlen(fc);
1204         if (HTCCheck(ieee, skb->data)) {
1205                 if (net_ratelimit())
1206                         printk("%s: find HTCControl!\n", __func__);
1207                 hdrlen += 4;
1208                 rx_stats->bContainHTC = 1;
1209         }
1210
1211          if (RTLLIB_QOS_HAS_SEQ(fc))
1212                 rx_stats->bIsQosData = 1;
1213
1214         return hdrlen;
1215 }
1216
1217 int rtllib_rx_check_duplicate(struct rtllib_device *ieee, struct sk_buff *skb, u8 multicast)
1218 {
1219         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1220         u16 fc, sc;
1221         u8 frag, type, stype;
1222
1223         fc = le16_to_cpu(hdr->frame_ctl);
1224         type = WLAN_FC_GET_TYPE(fc);
1225         stype = WLAN_FC_GET_STYPE(fc);
1226         sc = le16_to_cpu(hdr->seq_ctl);
1227         frag = WLAN_GET_SEQ_FRAG(sc);
1228
1229         if ( (ieee->pHTInfo->bCurRxReorderEnable == false) ||
1230                 !ieee->current_network.qos_data.active ||
1231                 !IsDataFrame(skb->data) ||
1232                 IsLegacyDataFrame(skb->data)) {
1233                 if (!((type == RTLLIB_FTYPE_MGMT) && (stype == RTLLIB_STYPE_BEACON))){
1234                         if (is_duplicate_packet(ieee, hdr)){
1235                                 return -1;
1236                         }
1237                 }
1238         } else {
1239                 PRX_TS_RECORD pRxTS = NULL;
1240                 if (GetTs(ieee, (PTS_COMMON_INFO*) &pRxTS, hdr->addr2,
1241                         (u8)Frame_QoSTID((u8*)(skb->data)), RX_DIR, true)) {
1242                         if ((fc & (1<<11)) && (frag == pRxTS->RxLastFragNum) &&
1243                             (WLAN_GET_SEQ_SEQ(sc) == pRxTS->RxLastSeqNum)) {
1244                                 return -1;
1245                         } else {
1246                                 pRxTS->RxLastFragNum = frag;
1247                                 pRxTS->RxLastSeqNum = WLAN_GET_SEQ_SEQ(sc);
1248                         }
1249                 } else {
1250                         RTLLIB_DEBUG(RTLLIB_DL_ERR, "ERR!!%s(): No TS!! Skip the check!!\n",__func__);
1251                         return -1;
1252                 }
1253         }
1254
1255         return 0;
1256 }
1257 void rtllib_rx_extract_addr(struct rtllib_device *ieee, struct rtllib_hdr_4addr *hdr, u8 *dst, u8 *src, u8 *bssid)
1258 {
1259         u16 fc = le16_to_cpu(hdr->frame_ctl);
1260
1261         switch (fc & (RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS)) {
1262                 case RTLLIB_FCTL_FROMDS:
1263                         memcpy(dst, hdr->addr1, ETH_ALEN);
1264                         memcpy(src, hdr->addr3, ETH_ALEN);
1265                         memcpy(bssid, hdr->addr2, ETH_ALEN);
1266                         break;
1267                 case RTLLIB_FCTL_TODS:
1268                         memcpy(dst, hdr->addr3, ETH_ALEN);
1269                         memcpy(src, hdr->addr2, ETH_ALEN);
1270                         memcpy(bssid, hdr->addr1, ETH_ALEN);
1271                         break;
1272                 case RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS:
1273                         memcpy(dst, hdr->addr3, ETH_ALEN);
1274                         memcpy(src, hdr->addr4, ETH_ALEN);
1275                         memcpy(bssid, ieee->current_network.bssid, ETH_ALEN);
1276                         break;
1277                 case 0:
1278                         memcpy(dst, hdr->addr1, ETH_ALEN);
1279                         memcpy(src, hdr->addr2, ETH_ALEN);
1280                         memcpy(bssid, hdr->addr3, ETH_ALEN);
1281                         break;
1282         }
1283 }
1284 int rtllib_rx_data_filter(struct rtllib_device *ieee, u16 fc, u8 *dst, u8 *src, u8 *bssid, u8 *addr2)
1285 {
1286         u8 zero_addr[ETH_ALEN] = {0};
1287         u8 type, stype;
1288
1289         type = WLAN_FC_GET_TYPE(fc);
1290         stype = WLAN_FC_GET_STYPE(fc);
1291
1292         /* Filter frames from different BSS */
1293         if (((fc & RTLLIB_FCTL_DSTODS) != RTLLIB_FCTL_DSTODS)
1294                 && (compare_ether_addr(ieee->current_network.bssid, bssid) != 0)
1295                 && memcmp(ieee->current_network.bssid, zero_addr, ETH_ALEN)) {
1296                 return -1;
1297         }
1298
1299         /* Filter packets sent by an STA that will be forwarded by AP */
1300         if ( ieee->IntelPromiscuousModeInfo.bPromiscuousOn  &&
1301                 ieee->IntelPromiscuousModeInfo.bFilterSourceStationFrame ) {
1302                 if ((fc & RTLLIB_FCTL_TODS) && !(fc & RTLLIB_FCTL_FROMDS) &&
1303                         (compare_ether_addr(dst, ieee->current_network.bssid) != 0) &&
1304                         (compare_ether_addr(bssid, ieee->current_network.bssid) == 0)) {
1305                         return -1;
1306                 }
1307         }
1308
1309         /* Nullfunc frames may have PS-bit set, so they must be passed to
1310          * hostap_handle_sta_rx() before being dropped here. */
1311         if (!ieee->IntelPromiscuousModeInfo.bPromiscuousOn){
1312                 if (stype != RTLLIB_STYPE_DATA &&
1313                     stype != RTLLIB_STYPE_DATA_CFACK &&
1314                     stype != RTLLIB_STYPE_DATA_CFPOLL &&
1315                     stype != RTLLIB_STYPE_DATA_CFACKPOLL&&
1316                     stype != RTLLIB_STYPE_QOS_DATA
1317                     ) {
1318                         if (stype != RTLLIB_STYPE_NULLFUNC)
1319                                 RTLLIB_DEBUG_DROP(
1320                                         "RX: dropped data frame "
1321                                         "with no data (type=0x%02x, "
1322                                         "subtype=0x%02x)\n",
1323                                         type, stype);
1324                         return -1;
1325                 }
1326         }
1327
1328         if (ieee->iw_mode != IW_MODE_MESH) {
1329                 /* packets from our adapter are dropped (echo) */
1330                 if (!memcmp(src, ieee->dev->dev_addr, ETH_ALEN))
1331                         return -1;
1332
1333                 /* {broad,multi}cast packets to our BSS go through */
1334                 if (is_multicast_ether_addr(dst) || is_broadcast_ether_addr(dst)) {
1335                         if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN)) {
1336                                 return -1;
1337                         }
1338                 }
1339         }
1340         return 0;
1341 }
1342 int rtllib_rx_get_crypt(
1343                 struct rtllib_device *ieee,
1344                 struct sk_buff *skb,
1345                 struct rtllib_crypt_data **crypt,
1346                 size_t hdrlen)
1347 {
1348         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1349         u16 fc = le16_to_cpu(hdr->frame_ctl);
1350         int idx = 0;
1351
1352         if (ieee->host_decrypt) {
1353                 if (skb->len >= hdrlen + 3)
1354                         idx = skb->data[hdrlen + 3] >> 6;
1355
1356                 *crypt = ieee->crypt[idx];
1357                 /* allow NULL decrypt to indicate an station specific override
1358                  * for default encryption */
1359                 if (*crypt && ((*crypt)->ops == NULL ||
1360                               (*crypt)->ops->decrypt_mpdu == NULL))
1361                         *crypt = NULL;
1362
1363                 if (!*crypt && (fc & RTLLIB_FCTL_WEP)) {
1364                         /* This seems to be triggered by some (multicast?)
1365                          * frames from other than current BSS, so just drop the
1366                          * frames silently instead of filling system log with
1367                          * these reports. */
1368                         RTLLIB_DEBUG_DROP("Decryption failed (not set)"
1369                                              " (SA=" MAC_FMT ")\n",
1370                                              MAC_ARG(hdr->addr2));
1371                         ieee->ieee_stats.rx_discards_undecryptable++;
1372                         return -1;
1373                 }
1374         }
1375
1376         return 0;
1377 }
1378 int rtllib_rx_decrypt(
1379                 struct rtllib_device *ieee,
1380                 struct sk_buff *skb,
1381                 struct rtllib_rx_stats *rx_stats,
1382                 struct rtllib_crypt_data *crypt,
1383                 size_t hdrlen)
1384 {
1385         struct rtllib_hdr_4addr *hdr;
1386         int keyidx = 0;
1387         u16 fc, sc;
1388         u8 frag;
1389
1390         hdr = (struct rtllib_hdr_4addr *)skb->data;
1391         fc = le16_to_cpu(hdr->frame_ctl);
1392         sc = le16_to_cpu(hdr->seq_ctl);
1393         frag = WLAN_GET_SEQ_FRAG(sc);
1394
1395         if ((!rx_stats->Decrypted)){
1396                 ieee->need_sw_enc = 1;
1397         }else{
1398                 ieee->need_sw_enc = 0;
1399         }
1400
1401         if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) &&
1402             ((keyidx = rtllib_rx_frame_decrypt(ieee, skb, crypt)) < 0)) {
1403                 printk("%s: decrypt frame error\n", __func__);
1404                 return -1;
1405         }
1406
1407         hdr = (struct rtllib_hdr_4addr *) skb->data;
1408         if ((frag != 0 || (fc & RTLLIB_FCTL_MOREFRAGS))) {
1409                 int flen;
1410                 struct sk_buff *frag_skb = rtllib_frag_cache_get(ieee, hdr);
1411                 RTLLIB_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
1412
1413                 if (!frag_skb) {
1414                         RTLLIB_DEBUG(RTLLIB_DL_RX | RTLLIB_DL_FRAG,
1415                                         "Rx cannot get skb from fragment "
1416                                         "cache (morefrag=%d seq=%u frag=%u)\n",
1417                                         (fc & RTLLIB_FCTL_MOREFRAGS) != 0,
1418                                         WLAN_GET_SEQ_SEQ(sc), frag);
1419                         return -1;
1420                 }
1421                 flen = skb->len;
1422                 if (frag != 0)
1423                         flen -= hdrlen;
1424
1425                 if (frag_skb->tail + flen > frag_skb->end) {
1426                         printk(KERN_WARNING "%s: host decrypted and "
1427                                "reassembled frame did not fit skb\n",
1428                                __func__);
1429                         rtllib_frag_cache_invalidate(ieee, hdr);
1430                         return -1;
1431                 }
1432
1433                 if (frag == 0) {
1434                         /* copy first fragment (including full headers) into
1435                          * beginning of the fragment cache skb */
1436                         memcpy(skb_put(frag_skb, flen), skb->data, flen);
1437                 } else {
1438                         /* append frame payload to the end of the fragment
1439                          * cache skb */
1440                         memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
1441                                flen);
1442                 }
1443                 dev_kfree_skb_any(skb);
1444                 skb = NULL;
1445
1446                 if (fc & RTLLIB_FCTL_MOREFRAGS) {
1447                         /* more fragments expected - leave the skb in fragment
1448                          * cache for now; it will be delivered to upper layers
1449                          * after all fragments have been received */
1450                         return -2;
1451                 }
1452
1453                 /* this was the last fragment and the frame will be
1454                  * delivered, so remove skb from fragment cache */
1455                 skb = frag_skb;
1456                 hdr = (struct rtllib_hdr_4addr *) skb->data;
1457                 rtllib_frag_cache_invalidate(ieee, hdr);
1458         }
1459
1460         /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
1461          * encrypted/authenticated */
1462         if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) &&
1463                 rtllib_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
1464         {
1465                 printk("%s: ==>decrypt msdu error\n", __func__);
1466                 return -1;
1467         }
1468
1469         hdr = (struct rtllib_hdr_4addr *) skb->data;
1470         if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep) {
1471                 if (/*ieee->ieee802_1x &&*/
1472                     rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1473
1474 #ifdef CONFIG_RTLLIB_DEBUG
1475                         /* pass unencrypted EAPOL frames even if encryption is
1476                          * configured */
1477                         struct eapol *eap = (struct eapol *)(skb->data +
1478                                 24);
1479                         RTLLIB_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1480                                                 eap_get_type(eap->type));
1481 #endif
1482                 } else {
1483                         RTLLIB_DEBUG_DROP(
1484                                 "encryption configured, but RX "
1485                                 "frame not encrypted (SA=" MAC_FMT ")\n",
1486                                 MAC_ARG(hdr->addr2));
1487                         return -1;
1488                 }
1489         }
1490
1491 #ifdef CONFIG_RTLLIB_DEBUG
1492         if (crypt && !(fc & RTLLIB_FCTL_WEP) &&
1493             rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1494                         struct eapol *eap = (struct eapol *)(skb->data +
1495                                 24);
1496                         RTLLIB_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1497                                                 eap_get_type(eap->type));
1498         }
1499 #endif
1500
1501         if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep &&
1502             !rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1503                 RTLLIB_DEBUG_DROP(
1504                         "dropped unencrypted RX data "
1505                         "frame from " MAC_FMT
1506                         " (drop_unencrypted=1)\n",
1507                         MAC_ARG(hdr->addr2));
1508                 return -1;
1509         }
1510
1511         if (rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1512                 printk(KERN_WARNING "RX: IEEE802.1X EAPOL frame!\n");
1513         }
1514
1515         return 0;
1516 }
1517 void rtllib_rx_check_leave_lps(struct rtllib_device *ieee, u8 unicast, u8 nr_subframes)
1518 {
1519         if (unicast){
1520
1521                 if ((ieee->state == RTLLIB_LINKED) /*&& !MgntInitAdapterInProgress(pMgntInfo)*/)
1522                 {
1523                         if (    ((ieee->LinkDetectInfo.NumRxUnicastOkInPeriod +ieee->LinkDetectInfo.NumTxOkInPeriod) > 8 ) ||
1524                                 (ieee->LinkDetectInfo.NumRxUnicastOkInPeriod > 2) )
1525                         {
1526                                 if (ieee->LeisurePSLeave)
1527                                         ieee->LeisurePSLeave(ieee->dev);
1528                         }
1529                 }
1530         }
1531         ieee->last_rx_ps_time = jiffies;
1532 }
1533 void rtllib_rx_indicate_pkt_legacy(
1534                 struct rtllib_device *ieee,
1535                 struct rtllib_rx_stats *rx_stats,
1536                 struct rtllib_rxb* rxb,
1537                 u8 *dst,
1538                 u8 *src)
1539 {
1540         struct net_device *dev = ieee->dev;
1541         u16 ethertype;
1542         int i = 0;
1543
1544         if (rxb == NULL){
1545                 printk("%s: rxb is NULL!!\n", __func__);
1546                 return ;
1547         }
1548
1549         for (i = 0; i<rxb->nr_subframes; i++) {
1550                 struct sk_buff *sub_skb = rxb->subframes[i];
1551
1552                 if (sub_skb) {
1553                         /* convert hdr + possible LLC headers into Ethernet header */
1554                         ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
1555                         if (sub_skb->len >= 8 &&
1556                                         ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
1557                                           ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1558                                          memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
1559                                 /* remove RFC1042 or Bridge-Tunnel encapsulation and
1560                                  * replace EtherType */
1561                                 skb_pull(sub_skb, SNAP_SIZE);
1562                                 memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1563                                 memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1564                         } else {
1565                                 u16 len;
1566                                 /* Leave Ethernet header part of hdr and full payload */
1567                                 len = htons(sub_skb->len);
1568                                 memcpy(skb_push(sub_skb, 2), &len, 2);
1569                                 memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1570                                 memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1571                         }
1572
1573                         ieee->stats.rx_packets++;
1574                         ieee->stats.rx_bytes += sub_skb->len;
1575
1576                         if (is_multicast_ether_addr(dst)) {
1577                                 ieee->stats.multicast++;
1578                         }
1579
1580                         /* Indicat the packets to upper layer */
1581                         memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
1582                         sub_skb->protocol = eth_type_trans(sub_skb, dev);
1583                         sub_skb->dev = dev;
1584                         sub_skb->dev->stats.rx_packets++;
1585                         sub_skb->dev->stats.rx_bytes += sub_skb->len;
1586 #ifdef TCP_CSUM_OFFLOAD_RX
1587                         if ( rx_stats->tcp_csum_valid)
1588                                 sub_skb->ip_summed = CHECKSUM_UNNECESSARY;
1589                         else
1590                                 sub_skb->ip_summed = CHECKSUM_NONE;
1591 #else
1592                         sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
1593 #endif
1594                         netif_rx(sub_skb);
1595                 }
1596         }
1597         kfree(rxb);
1598         rxb = NULL;
1599 }
1600 int rtllib_rx_InfraAdhoc(struct rtllib_device *ieee, struct sk_buff *skb,
1601                  struct rtllib_rx_stats *rx_stats)
1602 {
1603         struct net_device *dev = ieee->dev;
1604         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1605         struct rtllib_crypt_data *crypt = NULL;
1606         struct rtllib_rxb* rxb = NULL;
1607         PRX_TS_RECORD pTS = NULL;
1608         u16 fc, sc, SeqNum = 0;
1609         u8 type, stype, multicast = 0, unicast = 0, nr_subframes = 0, TID = 0;
1610         u8 dst[ETH_ALEN], src[ETH_ALEN], bssid[ETH_ALEN] = {0}, *payload;
1611         size_t hdrlen = 0;
1612         bool bToOtherSTA = false;
1613         int ret = 0, i = 0;
1614
1615         hdr = (struct rtllib_hdr_4addr *)skb->data;
1616         fc = le16_to_cpu(hdr->frame_ctl);
1617         type = WLAN_FC_GET_TYPE(fc);
1618         stype = WLAN_FC_GET_STYPE(fc);
1619         sc = le16_to_cpu(hdr->seq_ctl);
1620
1621         /*Filter pkt not to me*/
1622         multicast = is_multicast_ether_addr(hdr->addr1)|is_broadcast_ether_addr(hdr->addr1);
1623         unicast = !multicast;
1624         if (unicast && (compare_ether_addr(dev->dev_addr, hdr->addr1) != 0)) {
1625                 if (ieee->bNetPromiscuousMode)
1626                         bToOtherSTA = true;
1627                 else
1628                         goto rx_dropped;
1629         }
1630
1631         /*Filter pkt has too small length */
1632         hdrlen = rtllib_rx_get_hdrlen(ieee, skb, rx_stats);
1633         if (skb->len < hdrlen){
1634                 printk("%s():ERR!!! skb->len is smaller than hdrlen\n",__func__);
1635                 goto rx_dropped;
1636         }
1637
1638         /* Filter Duplicate pkt */
1639         ret = rtllib_rx_check_duplicate(ieee, skb, multicast);
1640         if (ret < 0)
1641                 goto rx_dropped;
1642
1643         /* Filter CTRL Frame */
1644         if (type == RTLLIB_FTYPE_CTL) {
1645                 goto rx_dropped;
1646         }
1647
1648         /* Filter MGNT Frame */
1649         if (type == RTLLIB_FTYPE_MGMT) {
1650                 if (bToOtherSTA)
1651                         goto rx_dropped;
1652                 if (rtllib_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
1653                         goto rx_dropped;
1654                 else
1655                         goto rx_exit;
1656         }
1657
1658         /* Filter WAPI DATA Frame */
1659
1660         /* Update statstics for AP roaming */
1661         if (!bToOtherSTA){
1662                 ieee->LinkDetectInfo.NumRecvDataInPeriod++;
1663                 ieee->LinkDetectInfo.NumRxOkInPeriod++;
1664         }
1665         dev->last_rx = jiffies;
1666
1667         /* Data frame - extract src/dst addresses */
1668         rtllib_rx_extract_addr(ieee, hdr, dst, src, bssid);
1669
1670         /* Filter Data frames */
1671         ret = rtllib_rx_data_filter(ieee, fc, dst, src, bssid, hdr->addr2);
1672         if (ret < 0)
1673                 goto rx_dropped;
1674
1675         if (skb->len == hdrlen){
1676                 goto rx_dropped;
1677         }
1678
1679         /* Send pspoll based on moredata */
1680         if ((ieee->iw_mode == IW_MODE_INFRA)  && (ieee->sta_sleep == LPS_IS_SLEEP)
1681                 && (ieee->polling) && (!bToOtherSTA)) {
1682                 if (WLAN_FC_MORE_DATA(fc)) {
1683                         /* more data bit is set, let's request a new frame from the AP */
1684                         rtllib_sta_ps_send_pspoll_frame(ieee);
1685                 } else {
1686                         ieee->polling =  false;
1687                 }
1688         }
1689
1690         /* Get crypt if encrypted */
1691         ret = rtllib_rx_get_crypt(ieee, skb, &crypt, hdrlen);
1692         if (ret == -1)
1693                 goto rx_dropped;
1694
1695         /* Decrypt data frame (including reassemble) */
1696         ret = rtllib_rx_decrypt(ieee, skb, rx_stats, crypt, hdrlen);
1697         if (ret == -1)
1698                 goto rx_dropped;
1699         else if (ret == -2)
1700                 goto rx_exit;
1701
1702         /* Get TS for Rx Reorder  */
1703         hdr = (struct rtllib_hdr_4addr *) skb->data;
1704         if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
1705                 && !is_multicast_ether_addr(hdr->addr1) && !is_broadcast_ether_addr(hdr->addr1)
1706                 && (!bToOtherSTA))
1707         {
1708                 TID = Frame_QoSTID(skb->data);
1709                 SeqNum = WLAN_GET_SEQ_SEQ(sc);
1710                 GetTs(ieee,(PTS_COMMON_INFO*) &pTS,hdr->addr2,TID,RX_DIR,true);
1711                 if (TID !=0 && TID !=3){
1712                         ieee->bis_any_nonbepkts = true;
1713                 }
1714         }
1715
1716         /* Parse rx data frame (For AMSDU) */
1717         /* skb: hdr + (possible reassembled) full plaintext payload */
1718         payload = skb->data + hdrlen;
1719         rxb = (struct rtllib_rxb*)kmalloc(sizeof(struct rtllib_rxb),GFP_ATOMIC);
1720         if (rxb == NULL)
1721         {
1722                 RTLLIB_DEBUG(RTLLIB_DL_ERR,"%s(): kmalloc rxb error\n",__func__);
1723                 goto rx_dropped;
1724         }
1725         /* to parse amsdu packets */
1726         /* qos data packets & reserved bit is 1 */
1727         if (parse_subframe(ieee,skb,rx_stats,rxb,src,dst) == 0) {
1728                 /* only to free rxb, and not submit the packets to upper layer */
1729                 for (i =0; i < rxb->nr_subframes; i++) {
1730                         dev_kfree_skb(rxb->subframes[i]);
1731                 }
1732                 kfree(rxb);
1733                 rxb = NULL;
1734                 goto rx_dropped;
1735         }
1736
1737         /* Update WAPI PN */
1738
1739         /* Check if leave LPS */
1740         if (!bToOtherSTA){
1741                 if (ieee->bIsAggregateFrame)
1742                         nr_subframes = rxb->nr_subframes;
1743                 else
1744                         nr_subframes = 1;
1745                 if (unicast)
1746                         ieee->LinkDetectInfo.NumRxUnicastOkInPeriod += nr_subframes;
1747                 rtllib_rx_check_leave_lps(ieee, unicast, nr_subframes);
1748         }
1749
1750         /* Indicate packets to upper layer or Rx Reorder */
1751         if (ieee->pHTInfo->bCurRxReorderEnable == false ||pTS == NULL || bToOtherSTA){
1752                 rtllib_rx_indicate_pkt_legacy(ieee, rx_stats, rxb, dst, src);
1753         }else{
1754 #ifdef TCP_CSUM_OFFLOAD_RX
1755                 rxb->tcp_csum_valid = rx_stats->tcp_csum_valid;
1756 #endif
1757                 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
1758         }
1759
1760         dev_kfree_skb(skb);
1761
1762  rx_exit:
1763         return 1;
1764
1765  rx_dropped:
1766         if (rxb != NULL)
1767         {
1768                 kfree(rxb);
1769                 rxb = NULL;
1770         }
1771         ieee->stats.rx_dropped++;
1772
1773         /* Returning 0 indicates to caller that we have not handled the SKB--
1774          * so it is still allocated and can be used again by underlying
1775          * hardware as a DMA target */
1776         return 0;
1777 }
1778
1779 int rtllib_rx_Master(struct rtllib_device *ieee, struct sk_buff *skb,
1780                  struct rtllib_rx_stats *rx_stats)
1781 {
1782         return 0;
1783 }
1784 int rtllib_rx_Monitor(struct rtllib_device *ieee, struct sk_buff *skb,
1785                  struct rtllib_rx_stats *rx_stats)
1786 {
1787         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1788         u16 fc = le16_to_cpu(hdr->frame_ctl);
1789         size_t hdrlen = rtllib_get_hdrlen(fc);
1790
1791         if (skb->len < hdrlen){
1792                 printk("%s():ERR!!! skb->len is smaller than hdrlen\n", __func__);
1793                 return 0;
1794         }
1795
1796         if (HTCCheck(ieee, skb->data)) {
1797                 if (net_ratelimit())
1798                         printk("%s: Find HTCControl!\n", __func__);
1799                 hdrlen += 4;
1800         }
1801
1802         rtllib_monitor_rx(ieee, skb, rx_stats, hdrlen);
1803         ieee->stats.rx_packets++;
1804         ieee->stats.rx_bytes += skb->len;
1805
1806         return 1;
1807 }
1808
1809 int rtllib_rx_Mesh(struct rtllib_device *ieee, struct sk_buff *skb,
1810                  struct rtllib_rx_stats *rx_stats)
1811 {
1812         return 0;
1813 }
1814
1815 /* All received frames are sent to this function. @skb contains the frame in
1816  * IEEE 802.11 format, i.e., in the format it was sent over air.
1817  * This function is called only as a tasklet (software IRQ). */
1818 int rtllib_rx(struct rtllib_device *ieee, struct sk_buff *skb,
1819                  struct rtllib_rx_stats *rx_stats)
1820 {
1821         int ret = 0;
1822
1823         if ((NULL==ieee) || (NULL==skb) || (NULL==rx_stats)){
1824                 printk(KERN_INFO "%s: Input parameters NULL!\n", __func__);
1825                 goto rx_dropped;
1826         }
1827         if (skb->len < 10) {
1828                 printk(KERN_INFO "%s: SKB length < 10 \n", __func__);
1829                 goto rx_dropped;
1830         }
1831
1832         switch (ieee->iw_mode) {
1833         case IW_MODE_ADHOC:
1834         case IW_MODE_INFRA:
1835                 ret = rtllib_rx_InfraAdhoc(ieee, skb, rx_stats);
1836                 break;
1837         case IW_MODE_MASTER:
1838         case IW_MODE_REPEAT:
1839                 ret = rtllib_rx_Master(ieee, skb, rx_stats);
1840                 break;
1841         case IW_MODE_MONITOR:
1842                 ret = rtllib_rx_Monitor(ieee, skb, rx_stats);
1843                 break;
1844         case IW_MODE_MESH:
1845                 ret = rtllib_rx_Mesh(ieee, skb, rx_stats);
1846                 break;
1847         default:
1848                 printk(KERN_INFO"%s: ERR iw mode!!!\n", __func__);
1849                 break;
1850         }
1851
1852         return ret;
1853
1854  rx_dropped:
1855         ieee->stats.rx_dropped++;
1856         return 0;
1857 }
1858
1859 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
1860
1861 /*
1862 * Make ther structure we read from the beacon packet has
1863 * the right values
1864 */
1865 static int rtllib_verify_qos_info(struct rtllib_qos_information_element
1866                                      *info_element, int sub_type)
1867 {
1868
1869         if (info_element->qui_subtype != sub_type)
1870                 return -1;
1871         if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
1872                 return -1;
1873         if (info_element->qui_type != QOS_OUI_TYPE)
1874                 return -1;
1875         if (info_element->version != QOS_VERSION_1)
1876                 return -1;
1877
1878         return 0;
1879 }
1880
1881
1882 /*
1883  * Parse a QoS parameter element
1884  */
1885 static int rtllib_read_qos_param_element(struct rtllib_qos_parameter_info
1886                                             *element_param, struct rtllib_info_element
1887                                             *info_element)
1888 {
1889         int ret = 0;
1890         u16 size = sizeof(struct rtllib_qos_parameter_info) - 2;
1891
1892         if ((info_element == NULL) || (element_param == NULL))
1893                 return -1;
1894
1895         if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
1896                 memcpy(element_param->info_element.qui, info_element->data,
1897                        info_element->len);
1898                 element_param->info_element.elementID = info_element->id;
1899                 element_param->info_element.length = info_element->len;
1900         } else
1901                 ret = -1;
1902         if (ret == 0)
1903                 ret = rtllib_verify_qos_info(&element_param->info_element,
1904                                                 QOS_OUI_PARAM_SUB_TYPE);
1905         return ret;
1906 }
1907
1908 /*
1909  * Parse a QoS information element
1910  */
1911 static int rtllib_read_qos_info_element(struct
1912                                            rtllib_qos_information_element
1913                                            *element_info, struct rtllib_info_element
1914                                            *info_element)
1915 {
1916         int ret = 0;
1917         u16 size = sizeof(struct rtllib_qos_information_element) - 2;
1918
1919         if (element_info == NULL)
1920                 return -1;
1921         if (info_element == NULL)
1922                 return -1;
1923
1924         if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
1925                 memcpy(element_info->qui, info_element->data,
1926                        info_element->len);
1927                 element_info->elementID = info_element->id;
1928                 element_info->length = info_element->len;
1929         } else
1930                 ret = -1;
1931
1932         if (ret == 0)
1933                 ret = rtllib_verify_qos_info(element_info,
1934                                                 QOS_OUI_INFO_SUB_TYPE);
1935         return ret;
1936 }
1937
1938
1939 /*
1940  * Write QoS parameters from the ac parameters.
1941  */
1942 static int rtllib_qos_convert_ac_to_parameters(struct rtllib_qos_parameter_info *param_elm,
1943                 struct rtllib_qos_data *qos_data)
1944 {
1945         struct rtllib_qos_ac_parameter *ac_params;
1946         struct rtllib_qos_parameters *qos_param = &(qos_data->parameters);
1947         int rc = 0;
1948         int i;
1949         u8 aci;
1950         u8 acm;
1951
1952         qos_data->wmm_acm = 0;
1953         for (i = 0; i < QOS_QUEUE_NUM; i++) {
1954                 ac_params = &(param_elm->ac_params_record[i]);
1955
1956                 aci = (ac_params->aci_aifsn & 0x60) >> 5;
1957                 acm = (ac_params->aci_aifsn & 0x10) >> 4;
1958
1959                 if (aci >= QOS_QUEUE_NUM)
1960                         continue;
1961                 switch (aci) {
1962                         case 1:
1963                                 /* BIT(0) | BIT(3) */
1964                                 if (acm)
1965                                         qos_data->wmm_acm |= (0x01<<0)|(0x01<<3);
1966                                 break;
1967                         case 2:
1968                                 /* BIT(4) | BIT(5) */
1969                                 if (acm)
1970                                         qos_data->wmm_acm |= (0x01<<4)|(0x01<<5);
1971                                 break;
1972                         case 3:
1973                                 /* BIT(6) | BIT(7) */
1974                                 if (acm)
1975                                         qos_data->wmm_acm |= (0x01<<6)|(0x01<<7);
1976                                 break;
1977                         case 0:
1978                         default:
1979                                 /* BIT(1) | BIT(2) */
1980                                 if (acm)
1981                                         qos_data->wmm_acm |= (0x01<<1)|(0x01<<2);
1982                                 break;
1983                 }
1984
1985                 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
1986
1987                 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
1988                 qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2:qos_param->aifs[aci];
1989
1990                 qos_param->cw_min[aci] = ac_params->ecw_min_max & 0x0F;
1991
1992                 qos_param->cw_max[aci] = (ac_params->ecw_min_max & 0xF0) >> 4;
1993
1994                 qos_param->flag[aci] =
1995                     (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1996                 qos_param->tx_op_limit[aci] = le16_to_cpu(ac_params->tx_op_limit);
1997         }
1998         return rc;
1999 }
2000
2001 /*
2002  * we have a generic data element which it may contain QoS information or
2003  * parameters element. check the information element length to decide
2004  * which type to read
2005  */
2006 static int rtllib_parse_qos_info_param_IE(struct rtllib_info_element
2007                                              *info_element,
2008                                              struct rtllib_network *network)
2009 {
2010         int rc = 0;
2011         struct rtllib_qos_information_element qos_info_element;
2012
2013         rc = rtllib_read_qos_info_element(&qos_info_element, info_element);
2014
2015         if (rc == 0) {
2016                 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
2017                 network->flags |= NETWORK_HAS_QOS_INFORMATION;
2018         } else {
2019                 struct rtllib_qos_parameter_info param_element;
2020
2021                 rc = rtllib_read_qos_param_element(&param_element,
2022                                                       info_element);
2023                 if (rc == 0) {
2024                         rtllib_qos_convert_ac_to_parameters(&param_element,
2025                                                                &(network->qos_data));
2026                         network->flags |= NETWORK_HAS_QOS_PARAMETERS;
2027                         network->qos_data.param_count =
2028                             param_element.info_element.ac_info & 0x0F;
2029                 }
2030         }
2031
2032         if (rc == 0) {
2033                 RTLLIB_DEBUG_QOS("QoS is supported\n");
2034                 network->qos_data.supported = 1;
2035         }
2036         return rc;
2037 }
2038
2039 #ifdef CONFIG_RTLLIB_DEBUG
2040 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
2041
2042 static const char *get_info_element_string(u16 id)
2043 {
2044         switch (id) {
2045                 MFIE_STRING(SSID);
2046                 MFIE_STRING(RATES);
2047                 MFIE_STRING(FH_SET);
2048                 MFIE_STRING(DS_SET);
2049                 MFIE_STRING(CF_SET);
2050                 MFIE_STRING(TIM);
2051                 MFIE_STRING(IBSS_SET);
2052                 MFIE_STRING(COUNTRY);
2053                 MFIE_STRING(HOP_PARAMS);
2054                 MFIE_STRING(HOP_TABLE);
2055                 MFIE_STRING(REQUEST);
2056                 MFIE_STRING(CHALLENGE);
2057                 MFIE_STRING(POWER_CONSTRAINT);
2058                 MFIE_STRING(POWER_CAPABILITY);
2059                 MFIE_STRING(TPC_REQUEST);
2060                 MFIE_STRING(TPC_REPORT);
2061                 MFIE_STRING(SUPP_CHANNELS);
2062                 MFIE_STRING(CSA);
2063                 MFIE_STRING(MEASURE_REQUEST);
2064                 MFIE_STRING(MEASURE_REPORT);
2065                 MFIE_STRING(QUIET);
2066                 MFIE_STRING(IBSS_DFS);
2067                 MFIE_STRING(RSN);
2068                 MFIE_STRING(RATES_EX);
2069                 MFIE_STRING(GENERIC);
2070                 MFIE_STRING(QOS_PARAMETER);
2071         default:
2072                 return "UNKNOWN";
2073         }
2074 }
2075 #endif
2076
2077 #ifdef ENABLE_DOT11D
2078 static inline void rtllib_extract_country_ie(
2079         struct rtllib_device *ieee,
2080         struct rtllib_info_element *info_element,
2081         struct rtllib_network *network,
2082         u8 * addr2)
2083 {
2084         if (IS_DOT11D_ENABLE(ieee)) {
2085                 if (info_element->len!= 0) {
2086                         memcpy(network->CountryIeBuf, info_element->data, info_element->len);
2087                         network->CountryIeLen = info_element->len;
2088
2089                         if (!IS_COUNTRY_IE_VALID(ieee))
2090                         {
2091                                 if ((rtllib_act_scanning(ieee,false) == true) && (ieee->FirstIe_InScan == 1))
2092                                         printk("Received beacon ContryIE, SSID: <%s>\n",network->ssid);
2093                                 Dot11d_UpdateCountryIe(ieee, addr2, info_element->len, info_element->data);
2094                         }
2095                 }
2096
2097                 if (IS_EQUAL_CIE_SRC(ieee, addr2)) {
2098                         UPDATE_CIE_WATCHDOG(ieee);
2099                 }
2100         }
2101
2102 }
2103 #endif
2104
2105 int rtllib_parse_info_param(struct rtllib_device *ieee,
2106                 struct rtllib_info_element *info_element,
2107                 u16 length,
2108                 struct rtllib_network *network,
2109                 struct rtllib_rx_stats *stats)
2110 {
2111         u8 i;
2112         short offset;
2113         u16     tmp_htcap_len=0;
2114         u16     tmp_htinfo_len=0;
2115         u16 ht_realtek_agg_len=0;
2116         u8  ht_realtek_agg_buf[MAX_IE_LEN];
2117 #ifdef CONFIG_RTLLIB_DEBUG
2118         char rates_str[64];
2119         char *p;
2120 #endif
2121         while (length >= sizeof(*info_element)) {
2122                 if (sizeof(*info_element) + info_element->len > length) {
2123                         RTLLIB_DEBUG_MGMT("Info elem: parse failed: "
2124                                              "info_element->len + 2 > left : "
2125                                              "info_element->len+2=%zd left=%d, id=%d.\n",
2126                                              info_element->len +
2127                                              sizeof(*info_element),
2128                                              length, info_element->id);
2129                         /* We stop processing but don't return an error here
2130                          * because some misbehaviour APs break this rule. ie.
2131                          * Orinoco AP1000. */
2132                         break;
2133                 }
2134
2135                 switch (info_element->id) {
2136                 case MFIE_TYPE_SSID:
2137                         if (rtllib_is_empty_essid(info_element->data,
2138                                                      info_element->len)) {
2139                                 network->flags |= NETWORK_EMPTY_ESSID;
2140                                 break;
2141                         }
2142
2143                         network->ssid_len = min(info_element->len,
2144                                                 (u8) IW_ESSID_MAX_SIZE);
2145                         memcpy(network->ssid, info_element->data, network->ssid_len);
2146                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
2147                                 memset(network->ssid + network->ssid_len, 0,
2148                                        IW_ESSID_MAX_SIZE - network->ssid_len);
2149
2150                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
2151                                              network->ssid, network->ssid_len);
2152                         break;
2153
2154                 case MFIE_TYPE_RATES:
2155 #ifdef CONFIG_RTLLIB_DEBUG
2156                         p = rates_str;
2157 #endif
2158                         network->rates_len = min(info_element->len,
2159                                                  MAX_RATES_LENGTH);
2160                         for (i = 0; i < network->rates_len; i++) {
2161                                 network->rates[i] = info_element->data[i];
2162 #ifdef CONFIG_RTLLIB_DEBUG
2163                                 p += snprintf(p, sizeof(rates_str) -
2164                                               (p - rates_str), "%02X ",
2165                                               network->rates[i]);
2166 #endif
2167                                 if (rtllib_is_ofdm_rate
2168                                     (info_element->data[i])) {
2169                                         network->flags |= NETWORK_HAS_OFDM;
2170                                         if (info_element->data[i] &
2171                                             RTLLIB_BASIC_RATE_MASK)
2172                                                 network->flags &=
2173                                                     ~NETWORK_HAS_CCK;
2174                                 }
2175
2176                                 if (rtllib_is_cck_rate
2177                                     (info_element->data[i])) {
2178                                         network->flags |= NETWORK_HAS_CCK;
2179                                 }
2180                         }
2181
2182                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
2183                                              rates_str, network->rates_len);
2184                         break;
2185
2186                 case MFIE_TYPE_RATES_EX:
2187 #ifdef CONFIG_RTLLIB_DEBUG
2188                         p = rates_str;
2189 #endif
2190                         network->rates_ex_len = min(info_element->len,
2191                                                     MAX_RATES_EX_LENGTH);
2192                         for (i = 0; i < network->rates_ex_len; i++) {
2193                                 network->rates_ex[i] = info_element->data[i];
2194 #ifdef CONFIG_RTLLIB_DEBUG
2195                                 p += snprintf(p, sizeof(rates_str) -
2196                                               (p - rates_str), "%02X ",
2197                                               network->rates[i]);
2198 #endif
2199                                 if (rtllib_is_ofdm_rate
2200                                     (info_element->data[i])) {
2201                                         network->flags |= NETWORK_HAS_OFDM;
2202                                         if (info_element->data[i] &
2203                                             RTLLIB_BASIC_RATE_MASK)
2204                                                 network->flags &=
2205                                                     ~NETWORK_HAS_CCK;
2206                                 }
2207                         }
2208
2209                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
2210                                              rates_str, network->rates_ex_len);
2211                         break;
2212
2213                 case MFIE_TYPE_DS_SET:
2214                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
2215                                              info_element->data[0]);
2216                         network->channel = info_element->data[0];
2217                         break;
2218
2219                 case MFIE_TYPE_FH_SET:
2220                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
2221                         break;
2222
2223                 case MFIE_TYPE_CF_SET:
2224                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
2225                         break;
2226
2227                 case MFIE_TYPE_TIM:
2228                         if (info_element->len < 4)
2229                                 break;
2230
2231                         network->tim.tim_count = info_element->data[0];
2232                         network->tim.tim_period = info_element->data[1];
2233
2234                         network->dtim_period = info_element->data[1];
2235                         if (ieee->state != RTLLIB_LINKED)
2236                                 break;
2237                         network->last_dtim_sta_time[0] = jiffies;
2238                         network->last_dtim_sta_time[1] = stats->mac_time[1];
2239
2240                         network->dtim_data = RTLLIB_DTIM_VALID;
2241
2242
2243                         if (info_element->data[2] & 1)
2244                                 network->dtim_data |= RTLLIB_DTIM_MBCAST;
2245
2246                         offset = (info_element->data[2] >> 1)*2;
2247
2248
2249                         if (ieee->assoc_id < 8*offset ||
2250                                 ieee->assoc_id > 8*(offset + info_element->len -3))
2251
2252                                 break;
2253
2254                         offset = (ieee->assoc_id / 8) - offset;
2255                         if (info_element->data[3+offset] & (1<<(ieee->assoc_id%8)))
2256                                 network->dtim_data |= RTLLIB_DTIM_UCAST;
2257
2258                         network->listen_interval = network->dtim_period;
2259                         break;
2260
2261                 case MFIE_TYPE_ERP:
2262                         network->erp_value = info_element->data[0];
2263                         network->flags |= NETWORK_HAS_ERP_VALUE;
2264                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
2265                                              network->erp_value);
2266                         break;
2267                 case MFIE_TYPE_IBSS_SET:
2268                         network->atim_window = info_element->data[0];
2269                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
2270                                              network->atim_window);
2271                         break;
2272
2273                 case MFIE_TYPE_CHALLENGE:
2274                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
2275                         break;
2276
2277                 case MFIE_TYPE_GENERIC:
2278                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
2279                                              info_element->len);
2280                         if (!rtllib_parse_qos_info_param_IE(info_element,
2281                                                                network))
2282                                 break;
2283                         if (info_element->len >= 4 &&
2284                             info_element->data[0] == 0x00 &&
2285                             info_element->data[1] == 0x50 &&
2286                             info_element->data[2] == 0xf2 &&
2287                             info_element->data[3] == 0x01) {
2288                                 network->wpa_ie_len = min(info_element->len + 2,
2289                                                           MAX_WPA_IE_LEN);
2290                                 memcpy(network->wpa_ie, info_element,
2291                                        network->wpa_ie_len);
2292                                 break;
2293                         }
2294                         if (info_element->len == 7 &&
2295                             info_element->data[0] == 0x00 &&
2296                             info_element->data[1] == 0xe0 &&
2297                             info_element->data[2] == 0x4c &&
2298                             info_element->data[3] == 0x01 &&
2299                             info_element->data[4] == 0x02)
2300                                 network->Turbo_Enable = 1;
2301
2302                         if (tmp_htcap_len == 0) {
2303                                 if (info_element->len >= 4 &&
2304                                    info_element->data[0] == 0x00 &&
2305                                    info_element->data[1] == 0x90 &&
2306                                    info_element->data[2] == 0x4c &&
2307                                    info_element->data[3] == 0x033) {
2308
2309                                                 tmp_htcap_len = min(info_element->len,(u8)MAX_IE_LEN);
2310                                                 if (tmp_htcap_len != 0){
2311                                                         network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
2312                                                         network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf)?\
2313                                                                 sizeof(network->bssht.bdHTCapBuf):tmp_htcap_len;
2314                                                         memcpy(network->bssht.bdHTCapBuf,info_element->data,network->bssht.bdHTCapLen);
2315                                                 }
2316                                 }
2317                                 if (tmp_htcap_len != 0){
2318                                         network->bssht.bdSupportHT = true;
2319                                         network->bssht.bdHT1R = ((((PHT_CAPABILITY_ELE)(network->bssht.bdHTCapBuf))->MCS[1]) == 0);
2320                                 }else{
2321                                         network->bssht.bdSupportHT = false;
2322                                         network->bssht.bdHT1R = false;
2323                                 }
2324                         }
2325
2326
2327                         if (tmp_htinfo_len == 0){
2328                                 if (info_element->len >= 4 &&
2329                                         info_element->data[0] == 0x00 &&
2330                                         info_element->data[1] == 0x90 &&
2331                                         info_element->data[2] == 0x4c &&
2332                                         info_element->data[3] == 0x034){
2333
2334                                                 tmp_htinfo_len = min(info_element->len,(u8)MAX_IE_LEN);
2335                                                 if (tmp_htinfo_len != 0){
2336                                                         network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
2337                                                         if (tmp_htinfo_len){
2338                                                                 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf)?\
2339                                                                         sizeof(network->bssht.bdHTInfoBuf):tmp_htinfo_len;
2340                                                                 memcpy(network->bssht.bdHTInfoBuf,info_element->data,network->bssht.bdHTInfoLen);
2341                                                         }
2342
2343                                                 }
2344
2345                                 }
2346                         }
2347
2348                         if (ieee->aggregation){
2349                                 if (network->bssht.bdSupportHT){
2350                                         if (info_element->len >= 4 &&
2351                                                 info_element->data[0] == 0x00 &&
2352                                                 info_element->data[1] == 0xe0 &&
2353                                                 info_element->data[2] == 0x4c &&
2354                                                 info_element->data[3] == 0x02){
2355
2356                                                 ht_realtek_agg_len = min(info_element->len,(u8)MAX_IE_LEN);
2357                                                 memcpy(ht_realtek_agg_buf,info_element->data,info_element->len);
2358
2359                                         }
2360                                         if (ht_realtek_agg_len >= 5){
2361                                                 network->realtek_cap_exit = true;
2362                                                 network->bssht.bdRT2RTAggregation = true;
2363
2364                                                 if ((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02))
2365                                                 network->bssht.bdRT2RTLongSlotTime = true;
2366
2367                                                 if ((ht_realtek_agg_buf[4]==1) && (ht_realtek_agg_buf[5] & RT_HT_CAP_USE_92SE))
2368                                                 {
2369                                                         network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_92SE;
2370                                                 }
2371                                         }
2372                                 }
2373                                 if (ht_realtek_agg_len >= 5){
2374                                         if ((ht_realtek_agg_buf[5] & RT_HT_CAP_USE_SOFTAP))
2375                                                 network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_SOFTAP;
2376                                 }
2377                         }
2378
2379                         {
2380                                 if ((info_element->len >= 3 &&
2381                                          info_element->data[0] == 0x00 &&
2382                                          info_element->data[1] == 0x05 &&
2383                                          info_element->data[2] == 0xb5) ||
2384                                          (info_element->len >= 3 &&
2385                                          info_element->data[0] == 0x00 &&
2386                                          info_element->data[1] == 0x0a &&
2387                                          info_element->data[2] == 0xf7) ||
2388                                          (info_element->len >= 3 &&
2389                                          info_element->data[0] == 0x00 &&
2390                                          info_element->data[1] == 0x10 &&
2391                                          info_element->data[2] == 0x18)){
2392
2393                                                 network->broadcom_cap_exist = true;
2394
2395                                 }
2396                         }
2397                         if (info_element->len >= 3 &&
2398                                 info_element->data[0] == 0x00 &&
2399                                 info_element->data[1] == 0x0c &&
2400                                 info_element->data[2] == 0x43)
2401                         {
2402                                 network->ralink_cap_exist = true;
2403                         }
2404                         if ((info_element->len >= 3 &&
2405                                 info_element->data[0] == 0x00 &&
2406                                 info_element->data[1] == 0x03 &&
2407                                 info_element->data[2] == 0x7f) ||
2408                                 (info_element->len >= 3 &&
2409                                 info_element->data[0] == 0x00 &&
2410                                 info_element->data[1] == 0x13 &&
2411                                 info_element->data[2] == 0x74))
2412                         {
2413                                 network->atheros_cap_exist = true;
2414                         }
2415
2416                         if ((info_element->len >= 3 &&
2417                                 info_element->data[0] == 0x00 &&
2418                                 info_element->data[1] == 0x50 &&
2419                                 info_element->data[2] == 0x43) )
2420                                 {
2421                                         network->marvell_cap_exist = true;
2422                                 }
2423                         if (info_element->len >= 3 &&
2424                                 info_element->data[0] == 0x00 &&
2425                                 info_element->data[1] == 0x40 &&
2426                                 info_element->data[2] == 0x96)
2427                         {
2428                                 network->cisco_cap_exist = true;
2429                         }
2430
2431
2432                         if (info_element->len >= 3 &&
2433                                 info_element->data[0] == 0x00 &&
2434                                 info_element->data[1] == 0x0a &&
2435                                 info_element->data[2] == 0xf5)
2436                         {
2437                                 network->airgo_cap_exist = true;
2438                         }
2439
2440                         if (info_element->len > 4 &&
2441                                 info_element->data[0] == 0x00 &&
2442                                 info_element->data[1] == 0x40 &&
2443                                 info_element->data[2] == 0x96 &&
2444                                 info_element->data[3] == 0x01)
2445                         {
2446                                 if (info_element->len == 6)
2447                                 {
2448                                         memcpy(network->CcxRmState, &info_element[4], 2);
2449                                         if (network->CcxRmState[0] != 0)
2450                                         {
2451                                                 network->bCcxRmEnable = true;
2452                                         }
2453                                         else
2454                                                 network->bCcxRmEnable = false;
2455                                         network->MBssidMask = network->CcxRmState[1] & 0x07;
2456                                         if (network->MBssidMask != 0)
2457                                         {
2458                                                 network->bMBssidValid = true;
2459                                                 network->MBssidMask = 0xff << (network->MBssidMask);
2460                                                 memcpy(network->MBssid, network->bssid, ETH_ALEN);
2461                                                 network->MBssid[5] &= network->MBssidMask;
2462                                         }
2463                                         else
2464                                         {
2465                                                 network->bMBssidValid = false;
2466                                         }
2467                                 }
2468                                 else
2469                                 {
2470                                         network->bCcxRmEnable = false;
2471                                 }
2472                         }
2473                         if (info_element->len > 4  &&
2474                                 info_element->data[0] == 0x00 &&
2475                                 info_element->data[1] == 0x40 &&
2476                                 info_element->data[2] == 0x96 &&
2477                                 info_element->data[3] == 0x03)
2478                         {
2479                                 if (info_element->len == 5)
2480                                 {
2481                                         network->bWithCcxVerNum = true;
2482                                         network->BssCcxVerNumber = info_element->data[4];
2483                                 }
2484                                 else
2485                                 {
2486                                         network->bWithCcxVerNum = false;
2487                                         network->BssCcxVerNumber = 0;
2488                                 }
2489                         }
2490                         if (info_element->len > 4  &&
2491                                 info_element->data[0] == 0x00 &&
2492                                 info_element->data[1] == 0x50 &&
2493                                 info_element->data[2] == 0xf2 &&
2494                                 info_element->data[3] == 0x04)
2495                         {
2496                                 RTLLIB_DEBUG_MGMT("MFIE_TYPE_WZC: %d bytes\n",
2497                                                      info_element->len);
2498                                 network->wzc_ie_len = min(info_element->len+2,
2499                                                           MAX_WZC_IE_LEN);
2500                                 memcpy(network->wzc_ie, info_element,
2501                                                 network->wzc_ie_len);
2502                         }
2503                         break;
2504
2505                 case MFIE_TYPE_RSN:
2506                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
2507                                              info_element->len);
2508                         network->rsn_ie_len = min(info_element->len + 2,
2509                                                   MAX_WPA_IE_LEN);
2510                         memcpy(network->rsn_ie, info_element,
2511                                network->rsn_ie_len);
2512                         break;
2513
2514                 case MFIE_TYPE_HT_CAP:
2515                         RTLLIB_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n",
2516                                              info_element->len);
2517                         tmp_htcap_len = min(info_element->len,(u8)MAX_IE_LEN);
2518                         if (tmp_htcap_len != 0){
2519                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
2520                                 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf)?\
2521                                         sizeof(network->bssht.bdHTCapBuf):tmp_htcap_len;
2522                                 memcpy(network->bssht.bdHTCapBuf,info_element->data,network->bssht.bdHTCapLen);
2523
2524                                 network->bssht.bdSupportHT = true;
2525                                 network->bssht.bdHT1R = ((((PHT_CAPABILITY_ELE)(network->bssht.bdHTCapBuf))->MCS[1]) == 0);
2526
2527                                 network->bssht.bdBandWidth = (HT_CHANNEL_WIDTH)(((PHT_CAPABILITY_ELE)(network->bssht.bdHTCapBuf))->ChlWidth);
2528                         }
2529                         else{
2530                                 network->bssht.bdSupportHT = false;
2531                                 network->bssht.bdHT1R = false;
2532                                 network->bssht.bdBandWidth = HT_CHANNEL_WIDTH_20 ;
2533                         }
2534                         break;
2535
2536
2537                 case MFIE_TYPE_HT_INFO:
2538                         RTLLIB_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n",
2539                                              info_element->len);
2540                         tmp_htinfo_len = min(info_element->len,(u8)MAX_IE_LEN);
2541                         if (tmp_htinfo_len){
2542                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
2543                                 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf)?\
2544                                         sizeof(network->bssht.bdHTInfoBuf):tmp_htinfo_len;
2545                                 memcpy(network->bssht.bdHTInfoBuf,info_element->data,network->bssht.bdHTInfoLen);
2546                         }
2547                         break;
2548
2549                 case MFIE_TYPE_AIRONET:
2550                         RTLLIB_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n",
2551                                              info_element->len);
2552                         if (info_element->len >IE_CISCO_FLAG_POSITION)
2553                         {
2554                                 network->bWithAironetIE = true;
2555
2556                                 if (    (info_element->data[IE_CISCO_FLAG_POSITION]&SUPPORT_CKIP_MIC)   ||
2557                                         (info_element->data[IE_CISCO_FLAG_POSITION]&SUPPORT_CKIP_PK)    )
2558                                 {
2559                                         network->bCkipSupported = true;
2560                                 }
2561                                 else
2562                                 {
2563                                         network->bCkipSupported = false;
2564                                 }
2565                         }
2566                         else
2567                         {
2568                                 network->bWithAironetIE = false;
2569                                 network->bCkipSupported = false;
2570                         }
2571                         break;
2572                 case MFIE_TYPE_QOS_PARAMETER:
2573                         printk(KERN_ERR
2574                                "QoS Error need to parse QOS_PARAMETER IE\n");
2575                         break;
2576
2577 #ifdef ENABLE_DOT11D
2578                 case MFIE_TYPE_COUNTRY:
2579                         RTLLIB_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
2580                                              info_element->len);
2581                         rtllib_extract_country_ie(ieee, info_element, network, network->bssid);
2582                         break;
2583 #endif
2584 /* TODO */
2585                 default:
2586                         RTLLIB_DEBUG_MGMT
2587                             ("Unsupported info element: %s (%d)\n",
2588                              get_info_element_string(info_element->id),
2589                              info_element->id);
2590                         break;
2591                 }
2592
2593                 length -= sizeof(*info_element) + info_element->len;
2594                 info_element =
2595                     (struct rtllib_info_element *)&info_element->
2596                     data[info_element->len];
2597         }
2598
2599         if (!network->atheros_cap_exist && !network->broadcom_cap_exist &&
2600                 !network->cisco_cap_exist && !network->ralink_cap_exist && !network->bssht.bdRT2RTAggregation)
2601         {
2602                 network->unknown_cap_exist = true;
2603         }
2604         else
2605         {
2606                 network->unknown_cap_exist = false;
2607         }
2608         return 0;
2609 }
2610
2611 static inline u8 rtllib_SignalStrengthTranslate(
2612         u8  CurrSS
2613         )
2614 {
2615         u8 RetSS;
2616
2617         if (CurrSS >= 71 && CurrSS <= 100)
2618         {
2619                 RetSS = 90 + ((CurrSS - 70) / 3);
2620         }
2621         else if (CurrSS >= 41 && CurrSS <= 70)
2622         {
2623                 RetSS = 78 + ((CurrSS - 40) / 3);
2624         }
2625         else if (CurrSS >= 31 && CurrSS <= 40)
2626         {
2627                 RetSS = 66 + (CurrSS - 30);
2628         }
2629         else if (CurrSS >= 21 && CurrSS <= 30)
2630         {
2631                 RetSS = 54 + (CurrSS - 20);
2632         }
2633         else if (CurrSS >= 5 && CurrSS <= 20)
2634         {
2635                 RetSS = 42 + (((CurrSS - 5) * 2) / 3);
2636         }
2637         else if (CurrSS == 4)
2638         {
2639                 RetSS = 36;
2640         }
2641         else if (CurrSS == 3)
2642         {
2643                 RetSS = 27;
2644         }
2645         else if (CurrSS == 2)
2646         {
2647                 RetSS = 18;
2648         }
2649         else if (CurrSS == 1)
2650         {
2651                 RetSS = 9;
2652         }
2653         else
2654         {
2655                 RetSS = CurrSS;
2656         }
2657
2658
2659
2660         return RetSS;
2661 }
2662
2663 long rtllib_translate_todbm(u8 signal_strength_index    )
2664 {
2665         long    signal_power;
2666
2667         signal_power = (long)((signal_strength_index + 1) >> 1);
2668         signal_power -= 95;
2669
2670         return signal_power;
2671 }
2672
2673 static inline int rtllib_network_init(
2674         struct rtllib_device *ieee,
2675         struct rtllib_probe_response *beacon,
2676         struct rtllib_network *network,
2677         struct rtllib_rx_stats *stats)
2678 {
2679 #ifdef CONFIG_RTLLIB_DEBUG
2680 #endif
2681
2682         /*
2683         network->qos_data.active = 0;
2684         network->qos_data.supported = 0;
2685         network->qos_data.param_count = 0;
2686         network->qos_data.old_param_count = 0;
2687         */
2688         memset(&network->qos_data, 0, sizeof(struct rtllib_qos_data));
2689
2690         /* Pull out fixed field data */
2691         memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
2692         network->capability = le16_to_cpu(beacon->capability);
2693         network->last_scanned = jiffies;
2694         network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
2695         network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
2696         network->beacon_interval = le32_to_cpu(beacon->beacon_interval);
2697         /* Where to pull this? beacon->listen_interval;*/
2698         network->listen_interval = 0x0A;
2699         network->rates_len = network->rates_ex_len = 0;
2700         network->last_associate = 0;
2701         network->ssid_len = 0;
2702         network->hidden_ssid_len = 0;
2703         memset(network->hidden_ssid, 0, sizeof(network->hidden_ssid));
2704         network->flags = 0;
2705         network->atim_window = 0;
2706         network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
2707             0x3 : 0x0;
2708         network->berp_info_valid = false;
2709         network->broadcom_cap_exist = false;
2710         network->ralink_cap_exist = false;
2711         network->atheros_cap_exist = false;
2712         network->cisco_cap_exist = false;
2713         network->unknown_cap_exist = false;
2714         network->realtek_cap_exit = false;
2715         network->marvell_cap_exist = false;
2716         network->airgo_cap_exist = false;
2717         network->Turbo_Enable = 0;
2718         network->SignalStrength = stats->SignalStrength;
2719         network->RSSI = stats->SignalStrength;
2720 #ifdef ENABLE_DOT11D
2721         network->CountryIeLen = 0;
2722         memset(network->CountryIeBuf, 0, MAX_IE_LEN);
2723 #endif
2724         HTInitializeBssDesc(&network->bssht);
2725         if (stats->freq == RTLLIB_52GHZ_BAND) {
2726                 /* for A band (No DS info) */
2727                 network->channel = stats->received_channel;
2728         } else
2729                 network->flags |= NETWORK_HAS_CCK;
2730
2731         network->wpa_ie_len = 0;
2732         network->rsn_ie_len = 0;
2733         network->wzc_ie_len = 0;
2734
2735         if (rtllib_parse_info_param(ieee,
2736                         beacon->info_element,
2737                         (stats->len - sizeof(*beacon)),
2738                         network,
2739                         stats))
2740                 return 1;
2741
2742         network->mode = 0;
2743         if (stats->freq == RTLLIB_52GHZ_BAND)
2744                 network->mode = IEEE_A;
2745         else {
2746                 if (network->flags & NETWORK_HAS_OFDM)
2747                         network->mode |= IEEE_G;
2748                 if (network->flags & NETWORK_HAS_CCK)
2749                         network->mode |= IEEE_B;
2750         }
2751
2752         if (network->mode == 0) {
2753                 RTLLIB_DEBUG_SCAN("Filtered out '%s (" MAC_FMT ")' "
2754                                      "network.\n",
2755                                      escape_essid(network->ssid,
2756                                                   network->ssid_len),
2757                                      MAC_ARG(network->bssid));
2758                 return 1;
2759         }
2760
2761         if (network->bssht.bdSupportHT){
2762                 if (network->mode == IEEE_A)
2763                         network->mode = IEEE_N_5G;
2764                 else if (network->mode & (IEEE_G | IEEE_B))
2765                         network->mode = IEEE_N_24G;
2766         }
2767         if (rtllib_is_empty_essid(network->ssid, network->ssid_len))
2768                 network->flags |= NETWORK_EMPTY_ESSID;
2769         stats->signal = 30 + (stats->SignalStrength * 70) / 100;
2770         stats->noise = rtllib_translate_todbm((u8)(100-stats->signal)) -25;
2771
2772         memcpy(&network->stats, stats, sizeof(network->stats));
2773
2774         return 0;
2775 }
2776
2777 static inline int is_same_network(struct rtllib_network *src,
2778                                   struct rtllib_network *dst, u8 ssidbroad)
2779 {
2780         /* A network is only a duplicate if the channel, BSSID, ESSID
2781          * and the capability field (in particular IBSS and BSS) all match.
2782          * We treat all <hidden> with the same BSSID and channel
2783          * as one network */
2784         return
2785                 (((src->ssid_len == dst->ssid_len) || (!ssidbroad)) &&
2786                 (src->channel == dst->channel) &&
2787                 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
2788                 (!memcmp(src->ssid, dst->ssid, src->ssid_len) || (!ssidbroad)) &&
2789                 ((src->capability & WLAN_CAPABILITY_IBSS) ==
2790                 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
2791                 ((src->capability & WLAN_CAPABILITY_ESS) ==
2792                 (dst->capability & WLAN_CAPABILITY_ESS)));
2793 }
2794
2795 static inline void update_ibss_network(struct rtllib_network *dst,
2796                                   struct rtllib_network *src)
2797 {
2798         memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats));
2799         dst->last_scanned = jiffies;
2800 }
2801
2802
2803 static inline void update_network(struct rtllib_network *dst,
2804                                   struct rtllib_network *src)
2805 {
2806         int qos_active;
2807         u8 old_param;
2808
2809         memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats));
2810         dst->capability = src->capability;
2811         memcpy(dst->rates, src->rates, src->rates_len);
2812         dst->rates_len = src->rates_len;
2813         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
2814         dst->rates_ex_len = src->rates_ex_len;
2815         if (src->ssid_len > 0)
2816         {
2817                 if (dst->ssid_len == 0)
2818                 {
2819                         memset(dst->hidden_ssid, 0, sizeof(dst->hidden_ssid));
2820                         dst->hidden_ssid_len = src->ssid_len;
2821                         memcpy(dst->hidden_ssid, src->ssid, src->ssid_len);
2822                 }else{
2823                         memset(dst->ssid, 0, dst->ssid_len);
2824                         dst->ssid_len = src->ssid_len;
2825                         memcpy(dst->ssid, src->ssid, src->ssid_len);
2826                 }
2827         }
2828         dst->mode = src->mode;
2829         dst->flags = src->flags;
2830         dst->time_stamp[0] = src->time_stamp[0];
2831         dst->time_stamp[1] = src->time_stamp[1];
2832         if (src->flags & NETWORK_HAS_ERP_VALUE)
2833         {
2834                 dst->erp_value = src->erp_value;
2835                 dst->berp_info_valid = src->berp_info_valid = true;
2836         }
2837         dst->beacon_interval = src->beacon_interval;
2838         dst->listen_interval = src->listen_interval;
2839         dst->atim_window = src->atim_window;
2840         dst->dtim_period = src->dtim_period;
2841         dst->dtim_data = src->dtim_data;
2842         dst->last_dtim_sta_time[0] = src->last_dtim_sta_time[0];
2843         dst->last_dtim_sta_time[1] = src->last_dtim_sta_time[1];
2844         memcpy(&dst->tim, &src->tim, sizeof(struct rtllib_tim_parameters));
2845
2846         dst->bssht.bdSupportHT = src->bssht.bdSupportHT;
2847         dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation;
2848         dst->bssht.bdHTCapLen= src->bssht.bdHTCapLen;
2849         memcpy(dst->bssht.bdHTCapBuf,src->bssht.bdHTCapBuf,src->bssht.bdHTCapLen);
2850         dst->bssht.bdHTInfoLen= src->bssht.bdHTInfoLen;
2851         memcpy(dst->bssht.bdHTInfoBuf,src->bssht.bdHTInfoBuf,src->bssht.bdHTInfoLen);
2852         dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer;
2853         dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime;
2854         dst->broadcom_cap_exist = src->broadcom_cap_exist;
2855         dst->ralink_cap_exist = src->ralink_cap_exist;
2856         dst->atheros_cap_exist = src->atheros_cap_exist;
2857         dst->realtek_cap_exit = src->realtek_cap_exit;
2858         dst->marvell_cap_exist = src->marvell_cap_exist;
2859         dst->cisco_cap_exist = src->cisco_cap_exist;
2860         dst->airgo_cap_exist = src->airgo_cap_exist;
2861         dst->unknown_cap_exist = src->unknown_cap_exist;
2862         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
2863         dst->wpa_ie_len = src->wpa_ie_len;
2864         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
2865         dst->rsn_ie_len = src->rsn_ie_len;
2866         memcpy(dst->wzc_ie, src->wzc_ie, src->wzc_ie_len);
2867         dst->wzc_ie_len = src->wzc_ie_len;
2868
2869         dst->last_scanned = jiffies;
2870         /* qos related parameters */
2871         qos_active = dst->qos_data.active;
2872         old_param = dst->qos_data.param_count;
2873         dst->qos_data.supported = src->qos_data.supported;
2874         if (dst->flags & NETWORK_HAS_QOS_PARAMETERS)
2875                 memcpy(&dst->qos_data, &src->qos_data, sizeof(struct rtllib_qos_data));
2876         if (dst->qos_data.supported == 1) {
2877                 if (dst->ssid_len)
2878                         RTLLIB_DEBUG_QOS
2879                                 ("QoS the network %s is QoS supported\n",
2880                                 dst->ssid);
2881                 else
2882                         RTLLIB_DEBUG_QOS
2883                                 ("QoS the network is QoS supported\n");
2884         }
2885         dst->qos_data.active = qos_active;
2886         dst->qos_data.old_param_count = old_param;
2887
2888         /* dst->last_associate is not overwritten */
2889         dst->wmm_info = src->wmm_info;
2890         if (src->wmm_param[0].ac_aci_acm_aifsn|| \
2891            src->wmm_param[1].ac_aci_acm_aifsn|| \
2892            src->wmm_param[2].ac_aci_acm_aifsn|| \
2893            src->wmm_param[1].ac_aci_acm_aifsn) {
2894           memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
2895         }
2896
2897         dst->SignalStrength = src->SignalStrength;
2898         dst->RSSI = src->RSSI;
2899         dst->Turbo_Enable = src->Turbo_Enable;
2900
2901 #ifdef ENABLE_DOT11D
2902         dst->CountryIeLen = src->CountryIeLen;
2903         memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
2904 #endif
2905
2906         dst->bWithAironetIE = src->bWithAironetIE;
2907         dst->bCkipSupported = src->bCkipSupported;
2908         memcpy(dst->CcxRmState,src->CcxRmState,2);
2909         dst->bCcxRmEnable = src->bCcxRmEnable;
2910         dst->MBssidMask = src->MBssidMask;
2911         dst->bMBssidValid = src->bMBssidValid;
2912         memcpy(dst->MBssid,src->MBssid,6);
2913         dst->bWithCcxVerNum = src->bWithCcxVerNum;
2914         dst->BssCcxVerNumber = src->BssCcxVerNumber;
2915
2916 }
2917 static inline int is_beacon(__le16 fc)
2918 {
2919         return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == RTLLIB_STYPE_BEACON);
2920 }
2921
2922 static int IsPassiveChannel( struct rtllib_device *rtllib, u8 channel)
2923 {
2924         if (MAX_CHANNEL_NUMBER < channel) {
2925                 printk("%s(): Invalid Channel\n", __func__);
2926                 return 0;
2927         }
2928
2929         if (rtllib->active_channel_map[channel] == 2)
2930                 return 1;
2931
2932         return 0;
2933 }
2934
2935 int IsLegalChannel( struct rtllib_device *rtllib, u8 channel)
2936 {
2937         if (MAX_CHANNEL_NUMBER < channel) {
2938                 printk("%s(): Invalid Channel\n", __func__);
2939                 return 0;
2940         }
2941         if (rtllib->active_channel_map[channel] > 0)
2942                 return 1;
2943
2944         return 0;
2945 }
2946
2947
2948 static inline void rtllib_process_probe_response(
2949         struct rtllib_device *ieee,
2950         struct rtllib_probe_response *beacon,
2951         struct rtllib_rx_stats *stats)
2952 {
2953         struct rtllib_network *target;
2954         struct rtllib_network *oldest = NULL;
2955 #ifdef CONFIG_RTLLIB_DEBUG
2956         struct rtllib_info_element *info_element = &beacon->info_element[0];
2957 #endif
2958         unsigned long flags;
2959         short renew;
2960         struct rtllib_network *network = kzalloc(sizeof(struct rtllib_network), GFP_ATOMIC);
2961
2962         if (!network)
2963                 return;
2964
2965         RTLLIB_DEBUG_SCAN(
2966                 "'%s' (" MAC_FMT "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
2967                 escape_essid(info_element->data, info_element->len),
2968                 MAC_ARG(beacon->header.addr3),
2969                 (beacon->capability & (1<<0xf)) ? '1' : '0',
2970                 (beacon->capability & (1<<0xe)) ? '1' : '0',
2971                 (beacon->capability & (1<<0xd)) ? '1' : '0',
2972                 (beacon->capability & (1<<0xc)) ? '1' : '0',
2973                 (beacon->capability & (1<<0xb)) ? '1' : '0',
2974                 (beacon->capability & (1<<0xa)) ? '1' : '0',
2975                 (beacon->capability & (1<<0x9)) ? '1' : '0',
2976                 (beacon->capability & (1<<0x8)) ? '1' : '0',
2977                 (beacon->capability & (1<<0x7)) ? '1' : '0',
2978                 (beacon->capability & (1<<0x6)) ? '1' : '0',
2979                 (beacon->capability & (1<<0x5)) ? '1' : '0',
2980                 (beacon->capability & (1<<0x4)) ? '1' : '0',
2981                 (beacon->capability & (1<<0x3)) ? '1' : '0',
2982                 (beacon->capability & (1<<0x2)) ? '1' : '0',
2983                 (beacon->capability & (1<<0x1)) ? '1' : '0',
2984                 (beacon->capability & (1<<0x0)) ? '1' : '0');
2985
2986         if (rtllib_network_init(ieee, beacon, network, stats)) {
2987                 RTLLIB_DEBUG_SCAN("Dropped '%s' (" MAC_FMT ") via %s.\n",
2988                                      escape_essid(info_element->data,
2989                                                   info_element->len),
2990                                      MAC_ARG(beacon->header.addr3),
2991                                      WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2992                                      RTLLIB_STYPE_PROBE_RESP ?
2993                                      "PROBE RESPONSE" : "BEACON");
2994                 goto free_network;
2995         }
2996
2997
2998         if (!IsLegalChannel(ieee, network->channel))
2999                 goto free_network;
3000
3001         if (WLAN_FC_GET_STYPE(beacon->header.frame_ctl) == RTLLIB_STYPE_PROBE_RESP) {
3002                 if (IsPassiveChannel(ieee, network->channel)) {
3003                         printk("GetScanInfo(): For Global Domain, "
3004                                "filter probe response at channel(%d).\n", network->channel);
3005                         goto free_network;
3006                 }
3007         }
3008
3009         /* The network parsed correctly -- so now we scan our known networks
3010          * to see if we can find it in our list.
3011          *
3012          * NOTE:  This search is definitely not optimized.  Once its doing
3013          *        the "right thing" we'll optimize it for efficiency if
3014          *        necessary */
3015
3016         /* Search for this entry in the list and update it if it is
3017          * already there. */
3018
3019         spin_lock_irqsave(&ieee->lock, flags);
3020         {
3021                 if (is_same_network(&ieee->current_network, network, (network->ssid_len?1:0))) {
3022                         update_network(&ieee->current_network, network);
3023                         if ((ieee->current_network.mode == IEEE_N_24G || ieee->current_network.mode == IEEE_G)
3024                         && ieee->current_network.berp_info_valid){
3025                         if (ieee->current_network.erp_value& ERP_UseProtection)
3026                                 ieee->current_network.buseprotection = true;
3027                 else
3028                         ieee->current_network.buseprotection = false;
3029                 }
3030                 if (is_beacon(beacon->header.frame_ctl))
3031                 {
3032                                 if (ieee->state >= RTLLIB_LINKED)
3033                                         ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
3034                         }
3035                 }
3036         }
3037         list_for_each_entry(target, &ieee->network_list, list) {
3038                 if (is_same_network(target, network,(target->ssid_len?1:0)))
3039                         break;
3040                 if ((oldest == NULL) ||
3041                     (target->last_scanned < oldest->last_scanned))
3042                         oldest = target;
3043         }
3044
3045         /* If we didn't find a match, then get a new network slot to initialize
3046          * with this beacon's information */
3047         if (&target->list == &ieee->network_list) {
3048                 if (list_empty(&ieee->network_free_list)) {
3049                         /* If there are no more slots, expire the oldest */
3050                         list_del(&oldest->list);
3051                         target = oldest;
3052                         RTLLIB_DEBUG_SCAN("Expired '%s' (" MAC_FMT ") from "
3053                                              "network list.\n",
3054                                              escape_essid(target->ssid,
3055                                                           target->ssid_len),
3056                                              MAC_ARG(target->bssid));
3057                 } else {
3058                         /* Otherwise just pull from the free list */
3059                         target = list_entry(ieee->network_free_list.next,
3060                                             struct rtllib_network, list);
3061                         list_del(ieee->network_free_list.next);
3062                 }
3063
3064
3065 #ifdef CONFIG_RTLLIB_DEBUG
3066                 RTLLIB_DEBUG_SCAN("Adding '%s' (" MAC_FMT ") via %s.\n",
3067                                      escape_essid(network->ssid,
3068                                                   network->ssid_len),
3069                                      MAC_ARG(network->bssid),
3070                                      WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
3071                                      RTLLIB_STYPE_PROBE_RESP ?
3072                                      "PROBE RESPONSE" : "BEACON");
3073 #endif
3074                 memcpy(target, network, sizeof(*target));
3075                 list_add_tail(&target->list, &ieee->network_list);
3076                 if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
3077                         rtllib_softmac_new_net(ieee, network);
3078         } else {
3079                 RTLLIB_DEBUG_SCAN("Updating '%s' (" MAC_FMT ") via %s.\n",
3080                                      escape_essid(target->ssid,
3081                                                   target->ssid_len),
3082                                      MAC_ARG(target->bssid),
3083                                      WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
3084                                      RTLLIB_STYPE_PROBE_RESP ?
3085                                      "PROBE RESPONSE" : "BEACON");
3086
3087                 /* we have an entry and we are going to update it. But this entry may
3088                  * be already expired. In this case we do the same as we found a new
3089                  * net and call the new_net handler
3090                  */
3091                 renew = !time_after(target->last_scanned + ieee->scan_age, jiffies);
3092                 if ((!target->ssid_len) &&
3093                         (((network->ssid_len > 0) && (target->hidden_ssid_len == 0))
3094                         || ((ieee->current_network.ssid_len == network->ssid_len) &&
3095                            (strncmp(ieee->current_network.ssid, network->ssid, network->ssid_len) == 0) &&
3096                            (ieee->state == RTLLIB_NOLINK)))
3097                         ) {
3098                         renew = 1;
3099                 }
3100                 update_network(target, network);
3101                 if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
3102                         rtllib_softmac_new_net(ieee, network);
3103         }
3104
3105         spin_unlock_irqrestore(&ieee->lock, flags);
3106         if (is_beacon(beacon->header.frame_ctl)&&is_same_network(&ieee->current_network, network, (network->ssid_len?1:0))&&\
3107                 (ieee->state == RTLLIB_LINKED)) {
3108                 if (ieee->handle_beacon != NULL) {
3109                         ieee->handle_beacon(ieee->dev,beacon,&ieee->current_network);
3110                 }
3111         }
3112 free_network:
3113         kfree(network);
3114         return;
3115 }
3116
3117 void rtllib_rx_mgt(struct rtllib_device *ieee,
3118                       struct sk_buff *skb,
3119                       struct rtllib_rx_stats *stats)
3120 {
3121     struct rtllib_hdr_4addr *header = (struct rtllib_hdr_4addr *)skb->data ;
3122     if (WLAN_FC_GET_STYPE(header->frame_ctl) != RTLLIB_STYPE_PROBE_RESP &&
3123             WLAN_FC_GET_STYPE(header->frame_ctl) != RTLLIB_STYPE_BEACON)
3124         ieee->last_rx_ps_time = jiffies;
3125
3126     switch (WLAN_FC_GET_STYPE(header->frame_ctl)) {
3127
3128         case RTLLIB_STYPE_BEACON:
3129             RTLLIB_DEBUG_MGMT("received BEACON (%d)\n",
3130                     WLAN_FC_GET_STYPE(header->frame_ctl));
3131             RTLLIB_DEBUG_SCAN("Beacon\n");
3132             rtllib_process_probe_response(
3133                     ieee, (struct rtllib_probe_response *)header, stats);
3134
3135             if (ieee->sta_sleep || (ieee->ps != RTLLIB_PS_DISABLED &&
3136                         ieee->iw_mode == IW_MODE_INFRA &&
3137                         ieee->state == RTLLIB_LINKED))
3138                 tasklet_schedule(&ieee->ps_task);
3139
3140             break;
3141
3142         case RTLLIB_STYPE_PROBE_RESP:
3143             RTLLIB_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
3144                     WLAN_FC_GET_STYPE(header->frame_ctl));
3145             RTLLIB_DEBUG_SCAN("Probe response\n");
3146             rtllib_process_probe_response(
3147                     ieee, (struct rtllib_probe_response *)header, stats);
3148             break;
3149         case RTLLIB_STYPE_PROBE_REQ:
3150             RTLLIB_DEBUG_MGMT("received PROBE RESQUEST (%d)\n",
3151                     WLAN_FC_GET_STYPE(header->frame_ctl));
3152             RTLLIB_DEBUG_SCAN("Probe request\n");
3153             if ((ieee->softmac_features & IEEE_SOFTMAC_PROBERS) &&
3154                     ((ieee->iw_mode == IW_MODE_ADHOC ||
3155                       ieee->iw_mode == IW_MODE_MASTER) &&
3156                      ieee->state == RTLLIB_LINKED)){
3157                 rtllib_rx_probe_rq(ieee, skb);
3158             }
3159             break;
3160     }
3161
3162 }