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