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 <andrea.merello@gmail.com>
  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/wireless.h>
  40 #include <linux/etherdevice.h>
  41 #include <linux/uaccess.h>
  42 #include <linux/ctype.h>
  43
  44 #include "rtllib.h"
  45 #include "dot11d.h"
  46
  47 static inline void rtllib_monitor_rx(struct rtllib_device *ieee,
  48                                      struct sk_buff *skb,
  49                                      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 = 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                         netdev_dbg(ieee->dev,
  74                                    "expiring fragment cache entry seq=%u last_frag=%u\n",
  75                                    entry->seq, entry->last_frag);
  76                         dev_kfree_skb_any(entry->skb);
  77                         entry->skb = NULL;
  78                 }
  79
  80                 if (entry->skb != NULL && entry->seq == seq &&
  81                     (entry->last_frag + 1 == frag || frag == -1) &&
  82                     memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
  83                     memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
  84                         return entry;
  85         }
  86
  87         return NULL;
  88 }
  89
  90 /* Called only as a tasklet (software IRQ) */
  91 static struct sk_buff *
  92 rtllib_frag_cache_get(struct rtllib_device *ieee,
  93                          struct rtllib_hdr_4addr *hdr)
  94 {
  95         struct sk_buff *skb = NULL;
  96         u16 fc = le16_to_cpu(hdr->frame_ctl);
  97         u16 sc = le16_to_cpu(hdr->seq_ctl);
  98         unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
  99         unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
 100         struct rtllib_frag_entry *entry;
 101         struct rtllib_hdr_3addrqos *hdr_3addrqos;
 102         struct rtllib_hdr_4addrqos *hdr_4addrqos;
 103         u8 tid;
 104
 105         if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) &&
 106             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                                     /* QOS Control */
 129                                     (RTLLIB_QOS_HAS_SEQ(fc) ? 2 : 0));
 130                 if (skb == NULL)
 131                         return NULL;
 132
 133                 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
 134                 ieee->frag_next_idx[tid]++;
 135                 if (ieee->frag_next_idx[tid] >= RTLLIB_FRAG_CACHE_LEN)
 136                         ieee->frag_next_idx[tid] = 0;
 137
 138                 if (entry->skb != NULL)
 139                         dev_kfree_skb_any(entry->skb);
 140
 141                 entry->first_frag_time = jiffies;
 142                 entry->seq = seq;
 143                 entry->last_frag = frag;
 144                 entry->skb = skb;
 145                 ether_addr_copy(entry->src_addr, hdr->addr2);
 146                 ether_addr_copy(entry->dst_addr, hdr->addr1);
 147         } else {
 148                 /* received a fragment of a frame for which the head fragment
 149                  * should have already been received
 150                  */
 151                 entry = rtllib_frag_cache_find(ieee, seq, frag, tid, hdr->addr2,
 152                                                   hdr->addr1);
 153                 if (entry != NULL) {
 154                         entry->last_frag = frag;
 155                         skb = entry->skb;
 156                 }
 157         }
 158
 159         return skb;
 160 }
 161
 162
 163 /* Called only as a tasklet (software IRQ) */
 164 static int rtllib_frag_cache_invalidate(struct rtllib_device *ieee,
 165                                            struct rtllib_hdr_4addr *hdr)
 166 {
 167         u16 fc = le16_to_cpu(hdr->frame_ctl);
 168         u16 sc = le16_to_cpu(hdr->seq_ctl);
 169         unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
 170         struct rtllib_frag_entry *entry;
 171         struct rtllib_hdr_3addrqos *hdr_3addrqos;
 172         struct rtllib_hdr_4addrqos *hdr_4addrqos;
 173         u8 tid;
 174
 175         if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) &&
 176             RTLLIB_QOS_HAS_SEQ(fc)) {
 177                 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
 178                 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 179                 tid = UP2AC(tid);
 180                 tid++;
 181         } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
 182                 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
 183                 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 184                 tid = UP2AC(tid);
 185                 tid++;
 186         } else {
 187                 tid = 0;
 188         }
 189
 190         entry = rtllib_frag_cache_find(ieee, seq, -1, tid, hdr->addr2,
 191                                           hdr->addr1);
 192
 193         if (entry == NULL) {
 194                 netdev_dbg(ieee->dev,
 195                            "Couldn't invalidate fragment cache entry (seq=%u)\n",
 196                            seq);
 197                 return -1;
 198         }
 199
 200         entry->skb = NULL;
 201         return 0;
 202 }
 203
 204 /* rtllib_rx_frame_mgtmt
 205  *
 206  * Responsible for handling management control frames
 207  *
 208  * Called by rtllib_rx
 209  */
 210 static inline int
 211 rtllib_rx_frame_mgmt(struct rtllib_device *ieee, struct sk_buff *skb,
 212                         struct rtllib_rx_stats *rx_stats, u16 type,
 213                         u16 stype)
 214 {
 215         /* On the struct stats definition there is written that
 216          * this is not mandatory.... but seems that the probe
 217          * response parser uses it
 218          */
 219         struct rtllib_hdr_3addr *hdr = (struct rtllib_hdr_3addr *)skb->data;
 220
 221         rx_stats->len = skb->len;
 222         rtllib_rx_mgt(ieee, skb, rx_stats);
 223         if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN))) {
 224                 dev_kfree_skb_any(skb);
 225                 return 0;
 226         }
 227         rtllib_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
 228
 229         dev_kfree_skb_any(skb);
 230
 231         return 0;
 232 }
 233
 234 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation
 235  * Ethernet-II snap header (RFC1042 for most EtherTypes)
 236  */
 237 static unsigned char rfc1042_header[] = {
 238         0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00
 239 };
 240 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
 241 static unsigned char bridge_tunnel_header[] = {
 242         0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8
 243 };
 244 /* No encapsulation header if EtherType < 0x600 (=length) */
 245
 246 /* Called by rtllib_rx_frame_decrypt */
 247 static int rtllib_is_eapol_frame(struct rtllib_device *ieee,
 248                                     struct sk_buff *skb, size_t hdrlen)
 249 {
 250         struct net_device *dev = ieee->dev;
 251         u16 fc, ethertype;
 252         struct rtllib_hdr_4addr *hdr;
 253         u8 *pos;
 254
 255         if (skb->len < 24)
 256                 return 0;
 257
 258         hdr = (struct rtllib_hdr_4addr *) skb->data;
 259         fc = le16_to_cpu(hdr->frame_ctl);
 260
 261         /* check that the frame is unicast frame to us */
 262         if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
 263             RTLLIB_FCTL_TODS &&
 264             memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
 265             memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
 266                 /* ToDS frame with own addr BSSID and DA */
 267         } else if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
 268                    RTLLIB_FCTL_FROMDS &&
 269                    memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
 270                 /* FromDS frame with own addr as DA */
 271         } else
 272                 return 0;
 273
 274         if (skb->len < 24 + 8)
 275                 return 0;
 276
 277         /* check for port access entity Ethernet type */
 278         pos = skb->data + hdrlen;
 279         ethertype = (pos[6] << 8) | pos[7];
 280         if (ethertype == ETH_P_PAE)
 281                 return 1;
 282
 283         return 0;
 284 }
 285
 286 /* Called only as a tasklet (software IRQ), by rtllib_rx */
 287 static inline int
 288 rtllib_rx_frame_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
 289                         struct lib80211_crypt_data *crypt)
 290 {
 291         struct rtllib_hdr_4addr *hdr;
 292         int res, hdrlen;
 293
 294         if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
 295                 return 0;
 296
 297         if (ieee->hwsec_active) {
 298                 struct cb_desc *tcb_desc = (struct cb_desc *)
 299                                                 (skb->cb + MAX_DEV_ADDR_SIZE);
 300
 301                 tcb_desc->bHwSec = 1;
 302
 303                 if (ieee->need_sw_enc)
 304                         tcb_desc->bHwSec = 0;
 305         }
 306
 307         hdr = (struct rtllib_hdr_4addr *) skb->data;
 308         hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 309
 310         atomic_inc(&crypt->refcnt);
 311         res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
 312         atomic_dec(&crypt->refcnt);
 313         if (res < 0) {
 314                 netdev_dbg(ieee->dev, "decryption failed (SA= %pM) res=%d\n",
 315                            hdr->addr2, res);
 316                 if (res == -2)
 317                         netdev_dbg(ieee->dev,
 318                                    "Decryption failed ICV mismatch (key %d)\n",
 319                                    skb->data[hdrlen + 3] >> 6);
 320                 ieee->ieee_stats.rx_discards_undecryptable++;
 321                 return -1;
 322         }
 323
 324         return res;
 325 }
 326
 327
 328 /* Called only as a tasklet (software IRQ), by rtllib_rx */
 329 static inline int
 330 rtllib_rx_frame_decrypt_msdu(struct rtllib_device *ieee, struct sk_buff *skb,
 331                              int keyidx, struct lib80211_crypt_data *crypt)
 332 {
 333         struct rtllib_hdr_4addr *hdr;
 334         int res, hdrlen;
 335
 336         if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
 337                 return 0;
 338         if (ieee->hwsec_active) {
 339                 struct cb_desc *tcb_desc = (struct cb_desc *)
 340                                                 (skb->cb + MAX_DEV_ADDR_SIZE);
 341
 342                 tcb_desc->bHwSec = 1;
 343
 344                 if (ieee->need_sw_enc)
 345                         tcb_desc->bHwSec = 0;
 346         }
 347
 348         hdr = (struct rtllib_hdr_4addr *) skb->data;
 349         hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 350
 351         atomic_inc(&crypt->refcnt);
 352         res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
 353         atomic_dec(&crypt->refcnt);
 354         if (res < 0) {
 355                 netdev_dbg(ieee->dev,
 356                            "MSDU decryption/MIC verification failed (SA= %pM keyidx=%d)\n",
 357                            hdr->addr2, keyidx);
 358                 return -1;
 359         }
 360
 361         return 0;
 362 }
 363
 364
 365 /* this function is stolen from ipw2200 driver*/
 366 #define IEEE_PACKET_RETRY_TIME (5*HZ)
 367 static int is_duplicate_packet(struct rtllib_device *ieee,
 368                                       struct rtllib_hdr_4addr *header)
 369 {
 370         u16 fc = le16_to_cpu(header->frame_ctl);
 371         u16 sc = le16_to_cpu(header->seq_ctl);
 372         u16 seq = WLAN_GET_SEQ_SEQ(sc);
 373         u16 frag = WLAN_GET_SEQ_FRAG(sc);
 374         u16 *last_seq, *last_frag;
 375         unsigned long *last_time;
 376         struct rtllib_hdr_3addrqos *hdr_3addrqos;
 377         struct rtllib_hdr_4addrqos *hdr_4addrqos;
 378         u8 tid;
 379
 380         if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) &&
 381             RTLLIB_QOS_HAS_SEQ(fc)) {
 382                 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)header;
 383                 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 384                 tid = UP2AC(tid);
 385                 tid++;
 386         } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
 387                 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)header;
 388                 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 389                 tid = UP2AC(tid);
 390                 tid++;
 391         } else {
 392                 tid = 0;
 393         }
 394
 395         switch (ieee->iw_mode) {
 396         case IW_MODE_ADHOC:
 397         {
 398                 struct list_head *p;
 399                 struct ieee_ibss_seq *entry = NULL;
 400                 u8 *mac = header->addr2;
 401                 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
 402
 403                 list_for_each(p, &ieee->ibss_mac_hash[index]) {
 404                         entry = list_entry(p, struct ieee_ibss_seq, list);
 405                         if (!memcmp(entry->mac, mac, ETH_ALEN))
 406                                 break;
 407                 }
 408                 if (p == &ieee->ibss_mac_hash[index]) {
 409                         entry = kmalloc(sizeof(struct ieee_ibss_seq),
 410                                         GFP_ATOMIC);
 411                         if (!entry)
 412                                 return 0;
 413
 414                         ether_addr_copy(entry->mac, mac);
 415                         entry->seq_num[tid] = seq;
 416                         entry->frag_num[tid] = frag;
 417                         entry->packet_time[tid] = jiffies;
 418                         list_add(&entry->list, &ieee->ibss_mac_hash[index]);
 419                         return 0;
 420                 }
 421                 last_seq = &entry->seq_num[tid];
 422                 last_frag = &entry->frag_num[tid];
 423                 last_time = &entry->packet_time[tid];
 424                 break;
 425         }
 426
 427         case IW_MODE_INFRA:
 428                 last_seq = &ieee->last_rxseq_num[tid];
 429                 last_frag = &ieee->last_rxfrag_num[tid];
 430                 last_time = &ieee->last_packet_time[tid];
 431                 break;
 432         default:
 433                 return 0;
 434         }
 435
 436         if ((*last_seq == seq) &&
 437             time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
 438                 if (*last_frag == frag)
 439                         goto drop;
 440                 if (*last_frag + 1 != frag)
 441                         /* out-of-order fragment */
 442                         goto drop;
 443         } else
 444                 *last_seq = seq;
 445
 446         *last_frag = frag;
 447         *last_time = jiffies;
 448         return 0;
 449
 450 drop:
 451
 452         return 1;
 453 }
 454
 455 static bool AddReorderEntry(struct rx_ts_record *pTS,
 456                             struct rx_reorder_entry *pReorderEntry)
 457 {
 458         struct list_head *pList = &pTS->RxPendingPktList;
 459
 460         while (pList->next != &pTS->RxPendingPktList) {
 461                 if (SN_LESS(pReorderEntry->SeqNum, ((struct rx_reorder_entry *)
 462                     list_entry(pList->next, struct rx_reorder_entry,
 463                     List))->SeqNum))
 464                         pList = pList->next;
 465                 else if (SN_EQUAL(pReorderEntry->SeqNum,
 466                         ((struct rx_reorder_entry *)list_entry(pList->next,
 467                         struct rx_reorder_entry, List))->SeqNum))
 468                                 return false;
 469                 else
 470                         break;
 471         }
 472         pReorderEntry->List.next = pList->next;
 473         pReorderEntry->List.next->prev = &pReorderEntry->List;
 474         pReorderEntry->List.prev = pList;
 475         pList->next = &pReorderEntry->List;
 476
 477         return true;
 478 }
 479
 480 void rtllib_indicate_packets(struct rtllib_device *ieee,
 481                              struct rtllib_rxb **prxbIndicateArray, u8 index)
 482 {
 483         struct net_device_stats *stats = &ieee->stats;
 484         u8 i = 0, j = 0;
 485         u16 ethertype;
 486
 487         for (j = 0; j < index; j++) {
 488                 struct rtllib_rxb *prxb = prxbIndicateArray[j];
 489
 490                 for (i = 0; i < prxb->nr_subframes; i++) {
 491                         struct sk_buff *sub_skb = prxb->subframes[i];
 492
 493                 /* convert hdr + possible LLC headers into Ethernet header */
 494                         ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
 495                         if (sub_skb->len >= 8 &&
 496                             ((memcmp(sub_skb->data, rfc1042_header,
 497                                      SNAP_SIZE) == 0 &&
 498                               ethertype != ETH_P_AARP &&
 499                               ethertype != ETH_P_IPX) ||
 500                             memcmp(sub_skb->data, bridge_tunnel_header,
 501                                    SNAP_SIZE) == 0)) {
 502                                 /* remove RFC1042 or Bridge-Tunnel encapsulation
 503                                  * and replace EtherType
 504                                  */
 505                                 skb_pull(sub_skb, SNAP_SIZE);
 506                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
 507                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
 508                         } else {
 509                                 u16 len;
 510                         /* Leave Ethernet header part of hdr and full payload */
 511                                 len = sub_skb->len;
 512                                 memcpy(skb_push(sub_skb, 2), &len, 2);
 513                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
 514                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
 515                         }
 516
 517                         /* Indicate the packets to upper layer */
 518                         if (sub_skb) {
 519                                 stats->rx_packets++;
 520                                 stats->rx_bytes += sub_skb->len;
 521
 522                                 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
 523                                 sub_skb->protocol = eth_type_trans(sub_skb,
 524                                                                    ieee->dev);
 525                                 sub_skb->dev = ieee->dev;
 526                                 sub_skb->dev->stats.rx_packets++;
 527                                 sub_skb->dev->stats.rx_bytes += sub_skb->len;
 528                                 /* 802.11 crc not sufficient */
 529                                 sub_skb->ip_summed = CHECKSUM_NONE;
 530                                 ieee->last_rx_ps_time = jiffies;
 531                                 netif_rx(sub_skb);
 532                         }
 533                 }
 534                 kfree(prxb);
 535                 prxb = NULL;
 536         }
 537 }
 538
 539 void rtllib_FlushRxTsPendingPkts(struct rtllib_device *ieee,
 540                                  struct rx_ts_record *pTS)
 541 {
 542         struct rx_reorder_entry *pRxReorderEntry;
 543         u8 RfdCnt = 0;
 544
 545         del_timer_sync(&pTS->RxPktPendingTimer);
 546         while (!list_empty(&pTS->RxPendingPktList)) {
 547                 if (RfdCnt >= REORDER_WIN_SIZE) {
 548                         netdev_info(ieee->dev,
 549                                     "-------------->%s() error! RfdCnt >= REORDER_WIN_SIZE\n",
 550                                     __func__);
 551                         break;
 552                 }
 553
 554                 pRxReorderEntry = (struct rx_reorder_entry *)
 555                                   list_entry(pTS->RxPendingPktList.prev,
 556                                              struct rx_reorder_entry, List);
 557                 netdev_dbg(ieee->dev, "%s(): Indicate SeqNum %d!\n", __func__,
 558                            pRxReorderEntry->SeqNum);
 559                 list_del_init(&pRxReorderEntry->List);
 560
 561                 ieee->RfdArray[RfdCnt] = pRxReorderEntry->prxb;
 562
 563                 RfdCnt = RfdCnt + 1;
 564                 list_add_tail(&pRxReorderEntry->List,
 565                               &ieee->RxReorder_Unused_List);
 566         }
 567         rtllib_indicate_packets(ieee, ieee->RfdArray, RfdCnt);
 568
 569         pTS->RxIndicateSeq = 0xffff;
 570 }
 571
 572 static void RxReorderIndicatePacket(struct rtllib_device *ieee,
 573                                     struct rtllib_rxb *prxb,
 574                                     struct rx_ts_record *pTS, u16 SeqNum)
 575 {
 576         struct rt_hi_throughput *pHTInfo = ieee->pHTInfo;
 577         struct rx_reorder_entry *pReorderEntry = NULL;
 578         u8 WinSize = pHTInfo->RxReorderWinSize;
 579         u16 WinEnd = 0;
 580         u8 index = 0;
 581         bool bMatchWinStart = false, bPktInBuf = false;
 582         unsigned long flags;
 583
 584         netdev_dbg(ieee->dev,
 585                    "%s(): Seq is %d, pTS->RxIndicateSeq is %d, WinSize is %d\n",
 586                    __func__, SeqNum, pTS->RxIndicateSeq, WinSize);
 587
 588         spin_lock_irqsave(&(ieee->reorder_spinlock), flags);
 589
 590         WinEnd = (pTS->RxIndicateSeq + WinSize - 1) % 4096;
 591         /* Rx Reorder initialize condition.*/
 592         if (pTS->RxIndicateSeq == 0xffff)
 593                 pTS->RxIndicateSeq = SeqNum;
 594
 595         /* Drop out the packet which SeqNum is smaller than WinStart */
 596         if (SN_LESS(SeqNum, pTS->RxIndicateSeq)) {
 597                 netdev_dbg(ieee->dev,
 598                            "Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
 599                            pTS->RxIndicateSeq, SeqNum);
 600                 pHTInfo->RxReorderDropCounter++;
 601                 {
 602                         int i;
 603
 604                         for (i = 0; i < prxb->nr_subframes; i++)
 605                                 dev_kfree_skb(prxb->subframes[i]);
 606                         kfree(prxb);
 607                         prxb = NULL;
 608                 }
 609                 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
 610                 return;
 611         }
 612
 613         /* Sliding window manipulation. Conditions includes:
 614          * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
 615          * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
 616          */
 617         if (SN_EQUAL(SeqNum, pTS->RxIndicateSeq)) {
 618                 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
 619                 bMatchWinStart = true;
 620         } else if (SN_LESS(WinEnd, SeqNum)) {
 621                 if (SeqNum >= (WinSize - 1))
 622                         pTS->RxIndicateSeq = SeqNum + 1 - WinSize;
 623                 else
 624                         pTS->RxIndicateSeq = 4095 -
 625                                              (WinSize - (SeqNum + 1)) + 1;
 626                         netdev_dbg(ieee->dev,
 627                                    "Window Shift! IndicateSeq: %d, NewSeq: %d\n",
 628                                    pTS->RxIndicateSeq, SeqNum);
 629         }
 630
 631         /* Indication process.
 632          * After Packet dropping and Sliding Window shifting as above, we can
 633          * now just indicate the packets with the SeqNum smaller than latest
 634          * WinStart and struct buffer other packets.
 635          *
 636          * For Rx Reorder condition:
 637          * 1. All packets with SeqNum smaller than WinStart => Indicate
 638          * 2. All packets with SeqNum larger than or equal to
 639          *       WinStart => Buffer it.
 640          */
 641         if (bMatchWinStart) {
 642                 /* Current packet is going to be indicated.*/
 643                 netdev_dbg(ieee->dev,
 644                            "Packets indication! IndicateSeq: %d, NewSeq: %d\n",
 645                            pTS->RxIndicateSeq, SeqNum);
 646                 ieee->prxbIndicateArray[0] = prxb;
 647                 index = 1;
 648         } else {
 649                 /* Current packet is going to be inserted into pending list.*/
 650                 if (!list_empty(&ieee->RxReorder_Unused_List)) {
 651                         pReorderEntry = (struct rx_reorder_entry *)
 652                                         list_entry(ieee->RxReorder_Unused_List.next,
 653                                         struct rx_reorder_entry, List);
 654                         list_del_init(&pReorderEntry->List);
 655
 656                         /* Make a reorder entry and insert
 657                          * into a the packet list.
 658                          */
 659                         pReorderEntry->SeqNum = SeqNum;
 660                         pReorderEntry->prxb = prxb;
 661
 662                         if (!AddReorderEntry(pTS, pReorderEntry)) {
 663                                 int i;
 664
 665                                 netdev_dbg(ieee->dev,
 666                                            "%s(): Duplicate packet is dropped. IndicateSeq: %d, NewSeq: %d\n",
 667                                            __func__, pTS->RxIndicateSeq,
 668                                            SeqNum);
 669                                 list_add_tail(&pReorderEntry->List,
 670                                               &ieee->RxReorder_Unused_List);
 671
 672                                 for (i = 0; i < prxb->nr_subframes; i++)
 673                                         dev_kfree_skb(prxb->subframes[i]);
 674                                 kfree(prxb);
 675                                 prxb = NULL;
 676                         } else {
 677                                 netdev_dbg(ieee->dev,
 678                                            "Pkt insert into struct buffer. IndicateSeq: %d, NewSeq: %d\n",
 679                                            pTS->RxIndicateSeq, SeqNum);
 680                         }
 681                 } else {
 682                         /* Packets are dropped if there are not enough reorder
 683                          * entries. This part should be modified!! We can just
 684                          * indicate all the packets in struct buffer and get
 685                          * reorder entries.
 686                          */
 687                         netdev_err(ieee->dev,
 688                                    "%s(): There is no reorder entry! Packet is dropped!\n",
 689                                    __func__);
 690                         {
 691                                 int i;
 692
 693                                 for (i = 0; i < prxb->nr_subframes; i++)
 694                                         dev_kfree_skb(prxb->subframes[i]);
 695                                 kfree(prxb);
 696                                 prxb = NULL;
 697                         }
 698                 }
 699         }
 700
 701         /* Check if there is any packet need indicate.*/
 702         while (!list_empty(&pTS->RxPendingPktList)) {
 703                 netdev_dbg(ieee->dev, "%s(): start RREORDER indicate\n",
 704                            __func__);
 705
 706                 pReorderEntry = (struct rx_reorder_entry *)
 707                                         list_entry(pTS->RxPendingPktList.prev,
 708                                                    struct rx_reorder_entry,
 709                                                    List);
 710                 if (SN_LESS(pReorderEntry->SeqNum, pTS->RxIndicateSeq) ||
 711                     SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq)) {
 712                         /* This protect struct buffer from overflow. */
 713                         if (index >= REORDER_WIN_SIZE) {
 714                                 netdev_err(ieee->dev,
 715                                            "%s(): Buffer overflow!\n",
 716                                            __func__);
 717                                 bPktInBuf = true;
 718                                 break;
 719                         }
 720
 721                         list_del_init(&pReorderEntry->List);
 722
 723                         if (SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
 724                                 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) %
 725                                                      4096;
 726
 727                         ieee->prxbIndicateArray[index] = pReorderEntry->prxb;
 728                         netdev_dbg(ieee->dev, "%s(): Indicate SeqNum %d!\n",
 729                                    __func__, pReorderEntry->SeqNum);
 730                         index++;
 731
 732                         list_add_tail(&pReorderEntry->List,
 733                                       &ieee->RxReorder_Unused_List);
 734                 } else {
 735                         bPktInBuf = true;
 736                         break;
 737                 }
 738         }
 739
 740         /* Handling pending timer. Set this timer to prevent from long time
 741          * Rx buffering.
 742          */
 743         if (index > 0) {
 744                 if (timer_pending(&pTS->RxPktPendingTimer))
 745                         del_timer_sync(&pTS->RxPktPendingTimer);
 746                 pTS->RxTimeoutIndicateSeq = 0xffff;
 747
 748                 if (index > REORDER_WIN_SIZE) {
 749                         netdev_err(ieee->dev,
 750                                    "%s(): Rx Reorder struct buffer full!\n",
 751                                    __func__);
 752                         spin_unlock_irqrestore(&(ieee->reorder_spinlock),
 753                                                flags);
 754                         return;
 755                 }
 756                 rtllib_indicate_packets(ieee, ieee->prxbIndicateArray, index);
 757                 bPktInBuf = false;
 758         }
 759
 760         if (bPktInBuf && pTS->RxTimeoutIndicateSeq == 0xffff) {
 761                 netdev_dbg(ieee->dev, "%s(): SET rx timeout timer\n", __func__);
 762                 pTS->RxTimeoutIndicateSeq = pTS->RxIndicateSeq;
 763                 mod_timer(&pTS->RxPktPendingTimer, jiffies +
 764                           msecs_to_jiffies(pHTInfo->RxReorderPendingTime));
 765         }
 766         spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
 767 }
 768
 769 static u8 parse_subframe(struct rtllib_device *ieee, struct sk_buff *skb,
 770                          struct rtllib_rx_stats *rx_stats,
 771                          struct rtllib_rxb *rxb, u8 *src, u8 *dst)
 772 {
 773         struct rtllib_hdr_3addr  *hdr = (struct rtllib_hdr_3addr *)skb->data;
 774         u16             fc = le16_to_cpu(hdr->frame_ctl);
 775
 776         u16             LLCOffset = sizeof(struct rtllib_hdr_3addr);
 777         u16             ChkLength;
 778         bool            bIsAggregateFrame = false;
 779         u16             nSubframe_Length;
 780         u8              nPadding_Length = 0;
 781         u16             SeqNum = 0;
 782         struct sk_buff *sub_skb;
 783         u8           *data_ptr;
 784         /* just for debug purpose */
 785         SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl));
 786         if ((RTLLIB_QOS_HAS_SEQ(fc)) &&
 787            (((union frameqos *)(skb->data + RTLLIB_3ADDR_LEN))->field.reserved))
 788                 bIsAggregateFrame = true;
 789
 790         if (RTLLIB_QOS_HAS_SEQ(fc))
 791                 LLCOffset += 2;
 792         if (rx_stats->bContainHTC)
 793                 LLCOffset += sHTCLng;
 794
 795         ChkLength = LLCOffset;
 796
 797         if (skb->len <= ChkLength)
 798                 return 0;
 799
 800         skb_pull(skb, LLCOffset);
 801         ieee->bIsAggregateFrame = bIsAggregateFrame;
 802         if (!bIsAggregateFrame) {
 803                 rxb->nr_subframes = 1;
 804
 805                 /* altered by clark 3/30/2010
 806                  * The struct buffer size of the skb indicated to upper layer
 807                  * must be less than 5000, or the defraged IP datagram
 808                  * in the IP layer will exceed "ipfrag_high_tresh" and be
 809                  * discarded. so there must not use the function
 810                  * "skb_copy" and "skb_clone" for "skb".
 811                  */
 812
 813                 /* Allocate new skb for releasing to upper layer */
 814                 sub_skb = dev_alloc_skb(RTLLIB_SKBBUFFER_SIZE);
 815                 if (!sub_skb)
 816                         return 0;
 817                 skb_reserve(sub_skb, 12);
 818                 data_ptr = (u8 *)skb_put(sub_skb, skb->len);
 819                 memcpy(data_ptr, skb->data, skb->len);
 820                 sub_skb->dev = ieee->dev;
 821
 822                 rxb->subframes[0] = sub_skb;
 823
 824                 memcpy(rxb->src, src, ETH_ALEN);
 825                 memcpy(rxb->dst, dst, ETH_ALEN);
 826                 rxb->subframes[0]->dev = ieee->dev;
 827                 return 1;
 828         }
 829
 830         rxb->nr_subframes = 0;
 831         memcpy(rxb->src, src, ETH_ALEN);
 832         memcpy(rxb->dst, dst, ETH_ALEN);
 833         while (skb->len > ETHERNET_HEADER_SIZE) {
 834                 /* Offset 12 denote 2 mac address */
 835                 nSubframe_Length = *((u16 *)(skb->data + 12));
 836                 nSubframe_Length = (nSubframe_Length >> 8) +
 837                                    (nSubframe_Length << 8);
 838
 839                 if (skb->len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
 840                         netdev_info(ieee->dev,
 841                                     "%s: A-MSDU parse error!! pRfd->nTotalSubframe : %d\n",
 842                                     __func__, rxb->nr_subframes);
 843                         netdev_info(ieee->dev,
 844                                     "%s: A-MSDU parse error!! Subframe Length: %d\n",
 845                                     __func__, nSubframe_Length);
 846                         netdev_info(ieee->dev,
 847                                     "nRemain_Length is %d and nSubframe_Length is : %d\n",
 848                                     skb->len, nSubframe_Length);
 849                         netdev_info(ieee->dev,
 850                                     "The Packet SeqNum is %d\n",
 851                                     SeqNum);
 852                         return 0;
 853                 }
 854
 855                 /* move the data point to data content */
 856                 skb_pull(skb, ETHERNET_HEADER_SIZE);
 857
 858                 /* altered by clark 3/30/2010
 859                  * The struct buffer size of the skb indicated to upper layer
 860                  * must be less than 5000, or the defraged IP datagram
 861                  * in the IP layer will exceed "ipfrag_high_tresh" and be
 862                  * discarded. so there must not use the function
 863                  * "skb_copy" and "skb_clone" for "skb".
 864                  */
 865
 866                 /* Allocate new skb for releasing to upper layer */
 867                 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
 868                 if (!sub_skb)
 869                         return 0;
 870                 skb_reserve(sub_skb, 12);
 871                 data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
 872                 memcpy(data_ptr, skb->data, nSubframe_Length);
 873
 874                 sub_skb->dev = ieee->dev;
 875                 rxb->subframes[rxb->nr_subframes++] = sub_skb;
 876                 if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
 877                         netdev_dbg(ieee->dev,
 878                                    "ParseSubframe(): Too many Subframes! Packets dropped!\n");
 879                         break;
 880                 }
 881                 skb_pull(skb, nSubframe_Length);
 882
 883                 if (skb->len != 0) {
 884                         nPadding_Length = 4 - ((nSubframe_Length +
 885                                           ETHERNET_HEADER_SIZE) % 4);
 886                         if (nPadding_Length == 4)
 887                                 nPadding_Length = 0;
 888
 889                         if (skb->len < nPadding_Length)
 890                                 return 0;
 891
 892                         skb_pull(skb, nPadding_Length);
 893                 }
 894         }
 895
 896         return rxb->nr_subframes;
 897 }
 898
 899
 900 static size_t rtllib_rx_get_hdrlen(struct rtllib_device *ieee,
 901                                    struct sk_buff *skb,
 902                                    struct rtllib_rx_stats *rx_stats)
 903 {
 904         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
 905         u16 fc = le16_to_cpu(hdr->frame_ctl);
 906         size_t hdrlen = 0;
 907
 908         hdrlen = rtllib_get_hdrlen(fc);
 909         if (HTCCheck(ieee, skb->data)) {
 910                 if (net_ratelimit())
 911                         netdev_info(ieee->dev, "%s: find HTCControl!\n",
 912                                     __func__);
 913                 hdrlen += 4;
 914                 rx_stats->bContainHTC = true;
 915         }
 916
 917          if (RTLLIB_QOS_HAS_SEQ(fc))
 918                 rx_stats->bIsQosData = true;
 919
 920         return hdrlen;
 921 }
 922
 923 static int rtllib_rx_check_duplicate(struct rtllib_device *ieee,
 924                                      struct sk_buff *skb, u8 multicast)
 925 {
 926         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
 927         u16 fc, sc;
 928         u8 frag, type, stype;
 929
 930         fc = le16_to_cpu(hdr->frame_ctl);
 931         type = WLAN_FC_GET_TYPE(fc);
 932         stype = WLAN_FC_GET_STYPE(fc);
 933         sc = le16_to_cpu(hdr->seq_ctl);
 934         frag = WLAN_GET_SEQ_FRAG(sc);
 935
 936         if ((ieee->pHTInfo->bCurRxReorderEnable == false) ||
 937                 !ieee->current_network.qos_data.active ||
 938                 !IsDataFrame(skb->data) ||
 939                 IsLegacyDataFrame(skb->data)) {
 940                 if (!((type == RTLLIB_FTYPE_MGMT) &&
 941                       (stype == RTLLIB_STYPE_BEACON))) {
 942                         if (is_duplicate_packet(ieee, hdr))
 943                                 return -1;
 944                 }
 945         } else {
 946                 struct rx_ts_record *pRxTS = NULL;
 947
 948                 if (GetTs(ieee, (struct ts_common_info **) &pRxTS, hdr->addr2,
 949                         (u8)Frame_QoSTID((u8 *)(skb->data)), RX_DIR, true)) {
 950                         if ((fc & (1<<11)) && (frag == pRxTS->RxLastFragNum) &&
 951                             (WLAN_GET_SEQ_SEQ(sc) == pRxTS->RxLastSeqNum))
 952                                 return -1;
 953                         pRxTS->RxLastFragNum = frag;
 954                         pRxTS->RxLastSeqNum = WLAN_GET_SEQ_SEQ(sc);
 955                 } else {
 956                         netdev_warn(ieee->dev, "%s(): No TS! Skip the check!\n",
 957                                     __func__);
 958                         return -1;
 959                 }
 960         }
 961
 962         return 0;
 963 }
 964
 965 static void rtllib_rx_extract_addr(struct rtllib_device *ieee,
 966                                    struct rtllib_hdr_4addr *hdr, u8 *dst,
 967                                    u8 *src, u8 *bssid)
 968 {
 969         u16 fc = le16_to_cpu(hdr->frame_ctl);
 970
 971         switch (fc & (RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS)) {
 972         case RTLLIB_FCTL_FROMDS:
 973                 ether_addr_copy(dst, hdr->addr1);
 974                 ether_addr_copy(src, hdr->addr3);
 975                 ether_addr_copy(bssid, hdr->addr2);
 976                 break;
 977         case RTLLIB_FCTL_TODS:
 978                 ether_addr_copy(dst, hdr->addr3);
 979                 ether_addr_copy(src, hdr->addr2);
 980                 ether_addr_copy(bssid, hdr->addr1);
 981                 break;
 982         case RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS:
 983                 ether_addr_copy(dst, hdr->addr3);
 984                 ether_addr_copy(src, hdr->addr4);
 985                 ether_addr_copy(bssid, ieee->current_network.bssid);
 986                 break;
 987         case 0:
 988                 ether_addr_copy(dst, hdr->addr1);
 989                 ether_addr_copy(src, hdr->addr2);
 990                 ether_addr_copy(bssid, hdr->addr3);
 991                 break;
 992         }
 993 }
 994
 995 static int rtllib_rx_data_filter(struct rtllib_device *ieee, u16 fc,
 996                                  u8 *dst, u8 *src, u8 *bssid, u8 *addr2)
 997 {
 998         u8 type, stype;
 999
1000         type = WLAN_FC_GET_TYPE(fc);
1001         stype = WLAN_FC_GET_STYPE(fc);
1002
1003         /* Filter frames from different BSS */
1004         if (((fc & RTLLIB_FCTL_DSTODS) != RTLLIB_FCTL_DSTODS) &&
1005             !ether_addr_equal(ieee->current_network.bssid, bssid) &&
1006             !is_zero_ether_addr(ieee->current_network.bssid)) {
1007                 return -1;
1008         }
1009
1010         /* Filter packets sent by an STA that will be forwarded by AP */
1011         if (ieee->IntelPromiscuousModeInfo.bPromiscuousOn  &&
1012                 ieee->IntelPromiscuousModeInfo.bFilterSourceStationFrame) {
1013                 if ((fc & RTLLIB_FCTL_TODS) && !(fc & RTLLIB_FCTL_FROMDS) &&
1014                     !ether_addr_equal(dst, ieee->current_network.bssid) &&
1015                     ether_addr_equal(bssid, ieee->current_network.bssid)) {
1016                         return -1;
1017                 }
1018         }
1019
1020         /* Nullfunc frames may have PS-bit set, so they must be passed to
1021          * hostap_handle_sta_rx() before being dropped here.
1022          */
1023         if (!ieee->IntelPromiscuousModeInfo.bPromiscuousOn) {
1024                 if (stype != RTLLIB_STYPE_DATA &&
1025                     stype != RTLLIB_STYPE_DATA_CFACK &&
1026                     stype != RTLLIB_STYPE_DATA_CFPOLL &&
1027                     stype != RTLLIB_STYPE_DATA_CFACKPOLL &&
1028                     stype != RTLLIB_STYPE_QOS_DATA) {
1029                         if (stype != RTLLIB_STYPE_NULLFUNC)
1030                                 netdev_dbg(ieee->dev,
1031                                            "RX: dropped data frame with no data (type=0x%02x, subtype=0x%02x)\n",
1032                                            type, stype);
1033                         return -1;
1034                 }
1035         }
1036
1037         if (ieee->iw_mode != IW_MODE_MESH) {
1038                 /* packets from our adapter are dropped (echo) */
1039                 if (!memcmp(src, ieee->dev->dev_addr, ETH_ALEN))
1040                         return -1;
1041
1042                 /* {broad,multi}cast packets to our BSS go through */
1043                 if (is_multicast_ether_addr(dst)) {
1044                         if (memcmp(bssid, ieee->current_network.bssid,
1045                                    ETH_ALEN))
1046                                 return -1;
1047                 }
1048         }
1049         return 0;
1050 }
1051
1052 static int rtllib_rx_get_crypt(struct rtllib_device *ieee, struct sk_buff *skb,
1053                         struct lib80211_crypt_data **crypt, size_t hdrlen)
1054 {
1055         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1056         u16 fc = le16_to_cpu(hdr->frame_ctl);
1057         int idx = 0;
1058
1059         if (ieee->host_decrypt) {
1060                 if (skb->len >= hdrlen + 3)
1061                         idx = skb->data[hdrlen + 3] >> 6;
1062
1063                 *crypt = ieee->crypt_info.crypt[idx];
1064                 /* allow NULL decrypt to indicate an station specific override
1065                  * for default encryption
1066                  */
1067                 if (*crypt && ((*crypt)->ops == NULL ||
1068                               (*crypt)->ops->decrypt_mpdu == NULL))
1069                         *crypt = NULL;
1070
1071                 if (!*crypt && (fc & RTLLIB_FCTL_WEP)) {
1072                         /* This seems to be triggered by some (multicast?)
1073                          * frames from other than current BSS, so just drop the
1074                          * frames silently instead of filling system log with
1075                          * these reports.
1076                          */
1077                         netdev_dbg(ieee->dev,
1078                                    "Decryption failed (not set) (SA= %pM)\n",
1079                                    hdr->addr2);
1080                         ieee->ieee_stats.rx_discards_undecryptable++;
1081                         return -1;
1082                 }
1083         }
1084
1085         return 0;
1086 }
1087
1088 static int rtllib_rx_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
1089                       struct rtllib_rx_stats *rx_stats,
1090                       struct lib80211_crypt_data *crypt, size_t hdrlen)
1091 {
1092         struct rtllib_hdr_4addr *hdr;
1093         int keyidx = 0;
1094         u16 fc, sc;
1095         u8 frag;
1096
1097         hdr = (struct rtllib_hdr_4addr *)skb->data;
1098         fc = le16_to_cpu(hdr->frame_ctl);
1099         sc = le16_to_cpu(hdr->seq_ctl);
1100         frag = WLAN_GET_SEQ_FRAG(sc);
1101
1102         if ((!rx_stats->Decrypted))
1103                 ieee->need_sw_enc = 1;
1104         else
1105                 ieee->need_sw_enc = 0;
1106
1107         keyidx = rtllib_rx_frame_decrypt(ieee, skb, crypt);
1108         if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) && (keyidx < 0)) {
1109                 netdev_info(ieee->dev, "%s: decrypt frame error\n", __func__);
1110                 return -1;
1111         }
1112
1113         hdr = (struct rtllib_hdr_4addr *) skb->data;
1114         if ((frag != 0 || (fc & RTLLIB_FCTL_MOREFRAGS))) {
1115                 int flen;
1116                 struct sk_buff *frag_skb = rtllib_frag_cache_get(ieee, hdr);
1117
1118                 netdev_dbg(ieee->dev, "Rx Fragment received (%u)\n", frag);
1119
1120                 if (!frag_skb) {
1121                         netdev_dbg(ieee->dev,
1122                                    "Rx cannot get skb from fragment cache (morefrag=%d seq=%u frag=%u)\n",
1123                                    (fc & RTLLIB_FCTL_MOREFRAGS) != 0,
1124                                    WLAN_GET_SEQ_SEQ(sc), frag);
1125                         return -1;
1126                 }
1127                 flen = skb->len;
1128                 if (frag != 0)
1129                         flen -= hdrlen;
1130
1131                 if (frag_skb->tail + flen > frag_skb->end) {
1132                         netdev_warn(ieee->dev,
1133                                     "%s: host decrypted and reassembled frame did not fit skb\n",
1134                                     __func__);
1135                         rtllib_frag_cache_invalidate(ieee, hdr);
1136                         return -1;
1137                 }
1138
1139                 if (frag == 0) {
1140                         /* copy first fragment (including full headers) into
1141                          * beginning of the fragment cache skb
1142                          */
1143                         memcpy(skb_put(frag_skb, flen), skb->data, flen);
1144                 } else {
1145                         /* append frame payload to the end of the fragment
1146                          * cache skb
1147                          */
1148                         memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
1149                                flen);
1150                 }
1151                 dev_kfree_skb_any(skb);
1152                 skb = NULL;
1153
1154                 if (fc & RTLLIB_FCTL_MOREFRAGS) {
1155                         /* more fragments expected - leave the skb in fragment
1156                          * cache for now; it will be delivered to upper layers
1157                          * after all fragments have been received
1158                          */
1159                         return -2;
1160                 }
1161
1162                 /* this was the last fragment and the frame will be
1163                  * delivered, so remove skb from fragment cache
1164                  */
1165                 skb = frag_skb;
1166                 hdr = (struct rtllib_hdr_4addr *) skb->data;
1167                 rtllib_frag_cache_invalidate(ieee, hdr);
1168         }
1169
1170         /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
1171          * encrypted/authenticated
1172          */
1173         if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) &&
1174                 rtllib_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) {
1175                 netdev_info(ieee->dev, "%s: ==>decrypt msdu error\n", __func__);
1176                 return -1;
1177         }
1178
1179         hdr = (struct rtllib_hdr_4addr *) skb->data;
1180         if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep) {
1181                 if (/*ieee->ieee802_1x &&*/
1182                     rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1183
1184                         /* pass unencrypted EAPOL frames even if encryption is
1185                          * configured
1186                          */
1187                         struct eapol *eap = (struct eapol *)(skb->data +
1188                                 24);
1189                         netdev_dbg(ieee->dev,
1190                                    "RX: IEEE 802.1X EAPOL frame: %s\n",
1191                                    eap_get_type(eap->type));
1192                 } else {
1193                         netdev_dbg(ieee->dev,
1194                                    "encryption configured, but RX frame not encrypted (SA= %pM)\n",
1195                                    hdr->addr2);
1196                         return -1;
1197                 }
1198         }
1199
1200         if (crypt && !(fc & RTLLIB_FCTL_WEP) &&
1201             rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1202                         struct eapol *eap = (struct eapol *)(skb->data +
1203                                 24);
1204                         netdev_dbg(ieee->dev,
1205                                    "RX: IEEE 802.1X EAPOL frame: %s\n",
1206                                    eap_get_type(eap->type));
1207         }
1208
1209         if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep &&
1210             !rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1211                 netdev_dbg(ieee->dev,
1212                            "dropped unencrypted RX data frame from %pM (drop_unencrypted=1)\n",
1213                            hdr->addr2);
1214                 return -1;
1215         }
1216
1217         if (rtllib_is_eapol_frame(ieee, skb, hdrlen))
1218                 netdev_warn(ieee->dev, "RX: IEEE802.1X EAPOL frame!\n");
1219
1220         return 0;
1221 }
1222
1223 static void rtllib_rx_check_leave_lps(struct rtllib_device *ieee, u8 unicast,
1224                                       u8 nr_subframes)
1225 {
1226         if (unicast) {
1227
1228                 if (ieee->state == RTLLIB_LINKED) {
1229                         if (((ieee->LinkDetectInfo.NumRxUnicastOkInPeriod +
1230                             ieee->LinkDetectInfo.NumTxOkInPeriod) > 8) ||
1231                             (ieee->LinkDetectInfo.NumRxUnicastOkInPeriod > 2)) {
1232                                 if (ieee->LeisurePSLeave)
1233                                         ieee->LeisurePSLeave(ieee->dev);
1234                         }
1235                 }
1236         }
1237         ieee->last_rx_ps_time = jiffies;
1238 }
1239
1240 static void rtllib_rx_indicate_pkt_legacy(struct rtllib_device *ieee,
1241                 struct rtllib_rx_stats *rx_stats,
1242                 struct rtllib_rxb *rxb,
1243                 u8 *dst,
1244                 u8 *src)
1245 {
1246         struct net_device *dev = ieee->dev;
1247         u16 ethertype;
1248         int i = 0;
1249
1250         if (rxb == NULL) {
1251                 netdev_info(dev, "%s: rxb is NULL!!\n", __func__);
1252                 return;
1253         }
1254
1255         for (i = 0; i < rxb->nr_subframes; i++) {
1256                 struct sk_buff *sub_skb = rxb->subframes[i];
1257
1258                 if (sub_skb) {
1259                         /* convert hdr + possible LLC headers
1260                          * into Ethernet header
1261                          */
1262                         ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
1263                         if (sub_skb->len >= 8 &&
1264                                 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
1265                                 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1266                                 memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
1267                                 /* remove RFC1042 or Bridge-Tunnel encapsulation
1268                                  * and replace EtherType
1269                                  */
1270                                 skb_pull(sub_skb, SNAP_SIZE);
1271                                 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1272                                                 src);
1273                                 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1274                                                 dst);
1275                         } else {
1276                                 u16 len;
1277                                 /* Leave Ethernet header part of hdr
1278                                  * and full payload
1279                                  */
1280                                 len = sub_skb->len;
1281                                 memcpy(skb_push(sub_skb, 2), &len, 2);
1282                                 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1283                                                 src);
1284                                 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1285                                                 dst);
1286                         }
1287
1288                         ieee->stats.rx_packets++;
1289                         ieee->stats.rx_bytes += sub_skb->len;
1290
1291                         if (is_multicast_ether_addr(dst))
1292                                 ieee->stats.multicast++;
1293
1294                         /* Indicate the packets to upper layer */
1295                         memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
1296                         sub_skb->protocol = eth_type_trans(sub_skb, dev);
1297                         sub_skb->dev = dev;
1298                         sub_skb->dev->stats.rx_packets++;
1299                         sub_skb->dev->stats.rx_bytes += sub_skb->len;
1300                         /* 802.11 crc not sufficient */
1301                         sub_skb->ip_summed = CHECKSUM_NONE;
1302                         netif_rx(sub_skb);
1303                 }
1304         }
1305         kfree(rxb);
1306 }
1307
1308 static int rtllib_rx_InfraAdhoc(struct rtllib_device *ieee, struct sk_buff *skb,
1309                  struct rtllib_rx_stats *rx_stats)
1310 {
1311         struct net_device *dev = ieee->dev;
1312         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1313         struct lib80211_crypt_data *crypt = NULL;
1314         struct rtllib_rxb *rxb = NULL;
1315         struct rx_ts_record *pTS = NULL;
1316         u16 fc, sc, SeqNum = 0;
1317         u8 type, stype, multicast = 0, unicast = 0, nr_subframes = 0, TID = 0;
1318         u8 *payload;
1319         u8 dst[ETH_ALEN];
1320         u8 src[ETH_ALEN];
1321         u8 bssid[ETH_ALEN] = {0};
1322
1323         size_t hdrlen = 0;
1324         bool bToOtherSTA = false;
1325         int ret = 0, i = 0;
1326
1327         hdr = (struct rtllib_hdr_4addr *)skb->data;
1328         fc = le16_to_cpu(hdr->frame_ctl);
1329         type = WLAN_FC_GET_TYPE(fc);
1330         stype = WLAN_FC_GET_STYPE(fc);
1331         sc = le16_to_cpu(hdr->seq_ctl);
1332
1333         /*Filter pkt not to me*/
1334         multicast = is_multicast_ether_addr(hdr->addr1);
1335         unicast = !multicast;
1336         if (unicast && !ether_addr_equal(dev->dev_addr, hdr->addr1)) {
1337                 if (ieee->bNetPromiscuousMode)
1338                         bToOtherSTA = true;
1339                 else
1340                         goto rx_dropped;
1341         }
1342
1343         /*Filter pkt has too small length */
1344         hdrlen = rtllib_rx_get_hdrlen(ieee, skb, rx_stats);
1345         if (skb->len < hdrlen) {
1346                 netdev_info(dev,
1347                             "%s():ERR!!! skb->len is smaller than hdrlen\n",
1348                             __func__);
1349                 goto rx_dropped;
1350         }
1351
1352         /* Filter Duplicate pkt */
1353         ret = rtllib_rx_check_duplicate(ieee, skb, multicast);
1354         if (ret < 0)
1355                 goto rx_dropped;
1356
1357         /* Filter CTRL Frame */
1358         if (type == RTLLIB_FTYPE_CTL)
1359                 goto rx_dropped;
1360
1361         /* Filter MGNT Frame */
1362         if (type == RTLLIB_FTYPE_MGMT) {
1363                 if (bToOtherSTA)
1364                         goto rx_dropped;
1365                 if (rtllib_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
1366                         goto rx_dropped;
1367                 else
1368                         goto rx_exit;
1369         }
1370
1371         /* Filter WAPI DATA Frame */
1372
1373         /* Update statstics for AP roaming */
1374         if (!bToOtherSTA) {
1375                 ieee->LinkDetectInfo.NumRecvDataInPeriod++;
1376                 ieee->LinkDetectInfo.NumRxOkInPeriod++;
1377         }
1378         dev->last_rx = jiffies;
1379
1380         /* Data frame - extract src/dst addresses */
1381         rtllib_rx_extract_addr(ieee, hdr, dst, src, bssid);
1382
1383         /* Filter Data frames */
1384         ret = rtllib_rx_data_filter(ieee, fc, dst, src, bssid, hdr->addr2);
1385         if (ret < 0)
1386                 goto rx_dropped;
1387
1388         if (skb->len == hdrlen)
1389                 goto rx_dropped;
1390
1391         /* Send pspoll based on moredata */
1392         if ((ieee->iw_mode == IW_MODE_INFRA)  &&
1393             (ieee->sta_sleep == LPS_IS_SLEEP) &&
1394             (ieee->polling) && (!bToOtherSTA)) {
1395                 if (WLAN_FC_MORE_DATA(fc)) {
1396                         /* more data bit is set, let's request a new frame
1397                          * from the AP
1398                          */
1399                         rtllib_sta_ps_send_pspoll_frame(ieee);
1400                 } else {
1401                         ieee->polling =  false;
1402                 }
1403         }
1404
1405         /* Get crypt if encrypted */
1406         ret = rtllib_rx_get_crypt(ieee, skb, &crypt, hdrlen);
1407         if (ret == -1)
1408                 goto rx_dropped;
1409
1410         /* Decrypt data frame (including reassemble) */
1411         ret = rtllib_rx_decrypt(ieee, skb, rx_stats, crypt, hdrlen);
1412         if (ret == -1)
1413                 goto rx_dropped;
1414         else if (ret == -2)
1415                 goto rx_exit;
1416
1417         /* Get TS for Rx Reorder  */
1418         hdr = (struct rtllib_hdr_4addr *) skb->data;
1419         if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
1420                 && !is_multicast_ether_addr(hdr->addr1)
1421                 && (!bToOtherSTA)) {
1422                 TID = Frame_QoSTID(skb->data);
1423                 SeqNum = WLAN_GET_SEQ_SEQ(sc);
1424                 GetTs(ieee, (struct ts_common_info **) &pTS, hdr->addr2, TID,
1425                       RX_DIR, true);
1426                 if (TID != 0 && TID != 3)
1427                         ieee->bis_any_nonbepkts = true;
1428         }
1429
1430         /* Parse rx data frame (For AMSDU) */
1431         /* skb: hdr + (possible reassembled) full plaintext payload */
1432         payload = skb->data + hdrlen;
1433         rxb = kmalloc(sizeof(struct rtllib_rxb), GFP_ATOMIC);
1434         if (rxb == NULL)
1435                 goto rx_dropped;
1436
1437         /* to parse amsdu packets */
1438         /* qos data packets & reserved bit is 1 */
1439         if (parse_subframe(ieee, skb, rx_stats, rxb, src, dst) == 0) {
1440                 /* only to free rxb, and not submit the packets
1441                  * to upper layer
1442                  */
1443                 for (i = 0; i < rxb->nr_subframes; i++)
1444                         dev_kfree_skb(rxb->subframes[i]);
1445                 kfree(rxb);
1446                 rxb = NULL;
1447                 goto rx_dropped;
1448         }
1449
1450         /* Update WAPI PN */
1451
1452         /* Check if leave LPS */
1453         if (!bToOtherSTA) {
1454                 if (ieee->bIsAggregateFrame)
1455                         nr_subframes = rxb->nr_subframes;
1456                 else
1457                         nr_subframes = 1;
1458                 if (unicast)
1459                         ieee->LinkDetectInfo.NumRxUnicastOkInPeriod += nr_subframes;
1460                 rtllib_rx_check_leave_lps(ieee, unicast, nr_subframes);
1461         }
1462
1463         /* Indicate packets to upper layer or Rx Reorder */
1464         if (ieee->pHTInfo->bCurRxReorderEnable == false || pTS == NULL ||
1465             bToOtherSTA)
1466                 rtllib_rx_indicate_pkt_legacy(ieee, rx_stats, rxb, dst, src);
1467         else
1468                 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
1469
1470         dev_kfree_skb(skb);
1471
1472  rx_exit:
1473         return 1;
1474
1475  rx_dropped:
1476         ieee->stats.rx_dropped++;
1477
1478         /* Returning 0 indicates to caller that we have not handled the SKB--
1479          * so it is still allocated and can be used again by underlying
1480          * hardware as a DMA target
1481          */
1482         return 0;
1483 }
1484
1485 static int rtllib_rx_Master(struct rtllib_device *ieee, struct sk_buff *skb,
1486                  struct rtllib_rx_stats *rx_stats)
1487 {
1488         return 0;
1489 }
1490
1491 static int rtllib_rx_Monitor(struct rtllib_device *ieee, struct sk_buff *skb,
1492                  struct rtllib_rx_stats *rx_stats)
1493 {
1494         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1495         u16 fc = le16_to_cpu(hdr->frame_ctl);
1496         size_t hdrlen = rtllib_get_hdrlen(fc);
1497
1498         if (skb->len < hdrlen) {
1499                 netdev_info(ieee->dev,
1500                             "%s():ERR!!! skb->len is smaller than hdrlen\n",
1501                             __func__);
1502                 return 0;
1503         }
1504
1505         if (HTCCheck(ieee, skb->data)) {
1506                 if (net_ratelimit())
1507                         netdev_info(ieee->dev, "%s: Find HTCControl!\n",
1508                                     __func__);
1509                 hdrlen += 4;
1510         }
1511
1512         rtllib_monitor_rx(ieee, skb, rx_stats, hdrlen);
1513         ieee->stats.rx_packets++;
1514         ieee->stats.rx_bytes += skb->len;
1515
1516         return 1;
1517 }
1518
1519 static int rtllib_rx_Mesh(struct rtllib_device *ieee, struct sk_buff *skb,
1520                  struct rtllib_rx_stats *rx_stats)
1521 {
1522         return 0;
1523 }
1524
1525 /* All received frames are sent to this function. @skb contains the frame in
1526  * IEEE 802.11 format, i.e., in the format it was sent over air.
1527  * This function is called only as a tasklet (software IRQ).
1528  */
1529 int rtllib_rx(struct rtllib_device *ieee, struct sk_buff *skb,
1530                  struct rtllib_rx_stats *rx_stats)
1531 {
1532         int ret = 0;
1533
1534         if ((NULL == ieee) || (NULL == skb) || (NULL == rx_stats)) {
1535                 pr_info("%s: Input parameters NULL!\n", __func__);
1536                 goto rx_dropped;
1537         }
1538         if (skb->len < 10) {
1539                 netdev_info(ieee->dev, "%s: SKB length < 10\n", __func__);
1540                 goto rx_dropped;
1541         }
1542
1543         switch (ieee->iw_mode) {
1544         case IW_MODE_ADHOC:
1545         case IW_MODE_INFRA:
1546                 ret = rtllib_rx_InfraAdhoc(ieee, skb, rx_stats);
1547                 break;
1548         case IW_MODE_MASTER:
1549         case IW_MODE_REPEAT:
1550                 ret = rtllib_rx_Master(ieee, skb, rx_stats);
1551                 break;
1552         case IW_MODE_MONITOR:
1553                 ret = rtllib_rx_Monitor(ieee, skb, rx_stats);
1554                 break;
1555         case IW_MODE_MESH:
1556                 ret = rtllib_rx_Mesh(ieee, skb, rx_stats);
1557                 break;
1558         default:
1559                 netdev_info(ieee->dev, "%s: ERR iw mode!!!\n", __func__);
1560                 break;
1561         }
1562
1563         return ret;
1564
1565  rx_dropped:
1566         if (ieee)
1567                 ieee->stats.rx_dropped++;
1568         return 0;
1569 }
1570 EXPORT_SYMBOL(rtllib_rx);
1571
1572 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
1573
1574 /* Make ther structure we read from the beacon packet has the right values */
1575 static int rtllib_verify_qos_info(struct rtllib_qos_information_element
1576                                      *info_element, int sub_type)
1577 {
1578
1579         if (info_element->qui_subtype != sub_type)
1580                 return -1;
1581         if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
1582                 return -1;
1583         if (info_element->qui_type != QOS_OUI_TYPE)
1584                 return -1;
1585         if (info_element->version != QOS_VERSION_1)
1586                 return -1;
1587
1588         return 0;
1589 }
1590
1591
1592 /* Parse a QoS parameter element */
1593 static int rtllib_read_qos_param_element(struct rtllib_qos_parameter_info
1594                                                         *element_param,
1595                                          struct rtllib_info_element
1596                                                         *info_element)
1597 {
1598         int ret = 0;
1599         u16 size = sizeof(struct rtllib_qos_parameter_info) - 2;
1600
1601         if ((info_element == NULL) || (element_param == NULL))
1602                 return -1;
1603
1604         if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
1605                 memcpy(element_param->info_element.qui, info_element->data,
1606                        info_element->len);
1607                 element_param->info_element.elementID = info_element->id;
1608                 element_param->info_element.length = info_element->len;
1609         } else
1610                 ret = -1;
1611         if (ret == 0)
1612                 ret = rtllib_verify_qos_info(&element_param->info_element,
1613                                                 QOS_OUI_PARAM_SUB_TYPE);
1614         return ret;
1615 }
1616
1617 /* Parse a QoS information element */
1618 static int rtllib_read_qos_info_element(struct rtllib_qos_information_element
1619                                                         *element_info,
1620                                         struct rtllib_info_element
1621                                                         *info_element)
1622 {
1623         int ret = 0;
1624         u16 size = sizeof(struct rtllib_qos_information_element) - 2;
1625
1626         if (element_info == NULL)
1627                 return -1;
1628         if (info_element == NULL)
1629                 return -1;
1630
1631         if ((info_element->id == QOS_ELEMENT_ID) &&
1632             (info_element->len == size)) {
1633                 memcpy(element_info->qui, info_element->data,
1634                        info_element->len);
1635                 element_info->elementID = info_element->id;
1636                 element_info->length = info_element->len;
1637         } else
1638                 ret = -1;
1639
1640         if (ret == 0)
1641                 ret = rtllib_verify_qos_info(element_info,
1642                                              QOS_OUI_INFO_SUB_TYPE);
1643         return ret;
1644 }
1645
1646
1647 /* Write QoS parameters from the ac parameters. */
1648 static int rtllib_qos_convert_ac_to_parameters(struct rtllib_qos_parameter_info *param_elm,
1649                                                struct rtllib_qos_data *qos_data)
1650 {
1651         struct rtllib_qos_ac_parameter *ac_params;
1652         struct rtllib_qos_parameters *qos_param = &(qos_data->parameters);
1653         int i;
1654         u8 aci;
1655         u8 acm;
1656
1657         qos_data->wmm_acm = 0;
1658         for (i = 0; i < QOS_QUEUE_NUM; i++) {
1659                 ac_params = &(param_elm->ac_params_record[i]);
1660
1661                 aci = (ac_params->aci_aifsn & 0x60) >> 5;
1662                 acm = (ac_params->aci_aifsn & 0x10) >> 4;
1663
1664                 if (aci >= QOS_QUEUE_NUM)
1665                         continue;
1666                 switch (aci) {
1667                 case 1:
1668                         /* BIT(0) | BIT(3) */
1669                         if (acm)
1670                                 qos_data->wmm_acm |= (0x01<<0)|(0x01<<3);
1671                         break;
1672                 case 2:
1673                         /* BIT(4) | BIT(5) */
1674                         if (acm)
1675                                 qos_data->wmm_acm |= (0x01<<4)|(0x01<<5);
1676                         break;
1677                 case 3:
1678                         /* BIT(6) | BIT(7) */
1679                         if (acm)
1680                                 qos_data->wmm_acm |= (0x01<<6)|(0x01<<7);
1681                         break;
1682                 case 0:
1683                 default:
1684                         /* BIT(1) | BIT(2) */
1685                         if (acm)
1686                                 qos_data->wmm_acm |= (0x01<<1)|(0x01<<2);
1687                         break;
1688                 }
1689
1690                 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
1691
1692                 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
1693                 qos_param->aifs[aci] = max_t(u8, qos_param->aifs[aci], 2);
1694
1695                 qos_param->cw_min[aci] = cpu_to_le16(ac_params->ecw_min_max &
1696                                                      0x0F);
1697
1698                 qos_param->cw_max[aci] = cpu_to_le16((ac_params->ecw_min_max &
1699                                                       0xF0) >> 4);
1700
1701                 qos_param->flag[aci] =
1702                     (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1703                 qos_param->tx_op_limit[aci] = ac_params->tx_op_limit;
1704         }
1705         return 0;
1706 }
1707
1708 /* we have a generic data element which it may contain QoS information or
1709  * parameters element. check the information element length to decide
1710  * which type to read
1711  */
1712 static int rtllib_parse_qos_info_param_IE(struct rtllib_device *ieee,
1713                                           struct rtllib_info_element
1714                                              *info_element,
1715                                           struct rtllib_network *network)
1716 {
1717         int rc = 0;
1718         struct rtllib_qos_information_element qos_info_element;
1719
1720         rc = rtllib_read_qos_info_element(&qos_info_element, info_element);
1721
1722         if (rc == 0) {
1723                 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1724                 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1725         } else {
1726                 struct rtllib_qos_parameter_info param_element;
1727
1728                 rc = rtllib_read_qos_param_element(&param_element,
1729                                                       info_element);
1730                 if (rc == 0) {
1731                         rtllib_qos_convert_ac_to_parameters(&param_element,
1732                                                                &(network->qos_data));
1733                         network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1734                         network->qos_data.param_count =
1735                             param_element.info_element.ac_info & 0x0F;
1736                 }
1737         }
1738
1739         if (rc == 0) {
1740                 netdev_dbg(ieee->dev, "QoS is supported\n");
1741                 network->qos_data.supported = 1;
1742         }
1743         return rc;
1744 }
1745
1746 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1747
1748 static const char *get_info_element_string(u16 id)
1749 {
1750         switch (id) {
1751         MFIE_STRING(SSID);
1752         MFIE_STRING(RATES);
1753         MFIE_STRING(FH_SET);
1754         MFIE_STRING(DS_SET);
1755         MFIE_STRING(CF_SET);
1756         MFIE_STRING(TIM);
1757         MFIE_STRING(IBSS_SET);
1758         MFIE_STRING(COUNTRY);
1759         MFIE_STRING(HOP_PARAMS);
1760         MFIE_STRING(HOP_TABLE);
1761         MFIE_STRING(REQUEST);
1762         MFIE_STRING(CHALLENGE);
1763         MFIE_STRING(POWER_CONSTRAINT);
1764         MFIE_STRING(POWER_CAPABILITY);
1765         MFIE_STRING(TPC_REQUEST);
1766         MFIE_STRING(TPC_REPORT);
1767         MFIE_STRING(SUPP_CHANNELS);
1768         MFIE_STRING(CSA);
1769         MFIE_STRING(MEASURE_REQUEST);
1770         MFIE_STRING(MEASURE_REPORT);
1771         MFIE_STRING(QUIET);
1772         MFIE_STRING(IBSS_DFS);
1773         MFIE_STRING(RSN);
1774         MFIE_STRING(RATES_EX);
1775         MFIE_STRING(GENERIC);
1776         MFIE_STRING(QOS_PARAMETER);
1777         default:
1778                 return "UNKNOWN";
1779         }
1780 }
1781
1782 static inline void rtllib_extract_country_ie(
1783         struct rtllib_device *ieee,
1784         struct rtllib_info_element *info_element,
1785         struct rtllib_network *network,
1786         u8 *addr2)
1787 {
1788         if (IS_DOT11D_ENABLE(ieee)) {
1789                 if (info_element->len != 0) {
1790                         memcpy(network->CountryIeBuf, info_element->data,
1791                                info_element->len);
1792                         network->CountryIeLen = info_element->len;
1793
1794                         if (!IS_COUNTRY_IE_VALID(ieee)) {
1795                                 if (rtllib_act_scanning(ieee, false) &&
1796                                     ieee->FirstIe_InScan)
1797                                         netdev_info(ieee->dev,
1798                                                     "Received beacon ContryIE, SSID: <%s>\n",
1799                                                     network->ssid);
1800                                 Dot11d_UpdateCountryIe(ieee, addr2,
1801                                                        info_element->len,
1802                                                        info_element->data);
1803                         }
1804                 }
1805
1806                 if (IS_EQUAL_CIE_SRC(ieee, addr2))
1807                         UPDATE_CIE_WATCHDOG(ieee);
1808         }
1809
1810 }
1811
1812 static void rtllib_parse_mife_generic(struct rtllib_device *ieee,
1813                                       struct rtllib_info_element *info_element,
1814                                       struct rtllib_network *network,
1815                                       u16 *tmp_htcap_len,
1816                                       u16 *tmp_htinfo_len)
1817 {
1818         u16 ht_realtek_agg_len = 0;
1819         u8  ht_realtek_agg_buf[MAX_IE_LEN];
1820
1821         if (!rtllib_parse_qos_info_param_IE(ieee, info_element, network))
1822                 return;
1823         if (info_element->len >= 4 &&
1824             info_element->data[0] == 0x00 &&
1825             info_element->data[1] == 0x50 &&
1826             info_element->data[2] == 0xf2 &&
1827             info_element->data[3] == 0x01) {
1828                 network->wpa_ie_len = min(info_element->len + 2,
1829                                           MAX_WPA_IE_LEN);
1830                 memcpy(network->wpa_ie, info_element, network->wpa_ie_len);
1831                 return;
1832         }
1833         if (info_element->len == 7 &&
1834             info_element->data[0] == 0x00 &&
1835             info_element->data[1] == 0xe0 &&
1836             info_element->data[2] == 0x4c &&
1837             info_element->data[3] == 0x01 &&
1838             info_element->data[4] == 0x02)
1839                 network->Turbo_Enable = 1;
1840
1841         if (*tmp_htcap_len == 0) {
1842                 if (info_element->len >= 4 &&
1843                     info_element->data[0] == 0x00 &&
1844                     info_element->data[1] == 0x90 &&
1845                     info_element->data[2] == 0x4c &&
1846                     info_element->data[3] == 0x033) {
1847                         *tmp_htcap_len = min_t(u8, info_element->len,
1848                                                MAX_IE_LEN);
1849                         if (*tmp_htcap_len != 0) {
1850                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1851                                 network->bssht.bdHTCapLen = min_t(u16, *tmp_htcap_len, sizeof(network->bssht.bdHTCapBuf));
1852                                 memcpy(network->bssht.bdHTCapBuf,
1853                                        info_element->data,
1854                                        network->bssht.bdHTCapLen);
1855                         }
1856                 }
1857                 if (*tmp_htcap_len != 0) {
1858                         network->bssht.bdSupportHT = true;
1859                         network->bssht.bdHT1R = ((((struct ht_capab_ele *)(network->bssht.bdHTCapBuf))->MCS[1]) == 0);
1860                 } else {
1861                         network->bssht.bdSupportHT = false;
1862                         network->bssht.bdHT1R = false;
1863                 }
1864         }
1865
1866
1867         if (*tmp_htinfo_len == 0) {
1868                 if (info_element->len >= 4 &&
1869                     info_element->data[0] == 0x00 &&
1870                     info_element->data[1] == 0x90 &&
1871                     info_element->data[2] == 0x4c &&
1872                     info_element->data[3] == 0x034) {
1873                         *tmp_htinfo_len = min_t(u8, info_element->len,
1874                                                 MAX_IE_LEN);
1875                         if (*tmp_htinfo_len != 0) {
1876                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1877                                 network->bssht.bdHTInfoLen = min_t(u16, *tmp_htinfo_len, sizeof(network->bssht.bdHTInfoBuf));
1878                                 memcpy(network->bssht.bdHTInfoBuf,
1879                                        info_element->data,
1880                                        network->bssht.bdHTInfoLen);
1881                         }
1882
1883                 }
1884         }
1885
1886         if (ieee->aggregation) {
1887                 if (network->bssht.bdSupportHT) {
1888                         if (info_element->len >= 4 &&
1889                             info_element->data[0] == 0x00 &&
1890                             info_element->data[1] == 0xe0 &&
1891                             info_element->data[2] == 0x4c &&
1892                             info_element->data[3] == 0x02) {
1893                                 ht_realtek_agg_len = min_t(u8,
1894                                                            info_element->len,
1895                                                            MAX_IE_LEN);
1896                                 memcpy(ht_realtek_agg_buf,
1897                                        info_element->data,
1898                                        info_element->len);
1899                         }
1900                         if (ht_realtek_agg_len >= 5) {
1901                                 network->realtek_cap_exit = true;
1902                                 network->bssht.bdRT2RTAggregation = true;
1903
1904                                 if ((ht_realtek_agg_buf[4] == 1) &&
1905                                     (ht_realtek_agg_buf[5] & 0x02))
1906                                         network->bssht.bdRT2RTLongSlotTime = true;
1907
1908                                 if ((ht_realtek_agg_buf[4] == 1) &&
1909                                     (ht_realtek_agg_buf[5] & RT_HT_CAP_USE_92SE))
1910                                         network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_92SE;
1911                         }
1912                 }
1913                 if (ht_realtek_agg_len >= 5) {
1914                         if ((ht_realtek_agg_buf[5] & RT_HT_CAP_USE_SOFTAP))
1915                                 network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_SOFTAP;
1916                 }
1917         }
1918
1919         if ((info_element->len >= 3 &&
1920              info_element->data[0] == 0x00 &&
1921              info_element->data[1] == 0x05 &&
1922              info_element->data[2] == 0xb5) ||
1923              (info_element->len >= 3 &&
1924              info_element->data[0] == 0x00 &&
1925              info_element->data[1] == 0x0a &&
1926              info_element->data[2] == 0xf7) ||
1927              (info_element->len >= 3 &&
1928              info_element->data[0] == 0x00 &&
1929              info_element->data[1] == 0x10 &&
1930              info_element->data[2] == 0x18)) {
1931                 network->broadcom_cap_exist = true;
1932         }
1933         if (info_element->len >= 3 &&
1934             info_element->data[0] == 0x00 &&
1935             info_element->data[1] == 0x0c &&
1936             info_element->data[2] == 0x43)
1937                 network->ralink_cap_exist = true;
1938         if ((info_element->len >= 3 &&
1939              info_element->data[0] == 0x00 &&
1940              info_element->data[1] == 0x03 &&
1941              info_element->data[2] == 0x7f) ||
1942              (info_element->len >= 3 &&
1943              info_element->data[0] == 0x00 &&
1944              info_element->data[1] == 0x13 &&
1945              info_element->data[2] == 0x74))
1946                 network->atheros_cap_exist = true;
1947
1948         if ((info_element->len >= 3 &&
1949              info_element->data[0] == 0x00 &&
1950              info_element->data[1] == 0x50 &&
1951              info_element->data[2] == 0x43))
1952                 network->marvell_cap_exist = true;
1953         if (info_element->len >= 3 &&
1954             info_element->data[0] == 0x00 &&
1955             info_element->data[1] == 0x40 &&
1956             info_element->data[2] == 0x96)
1957                 network->cisco_cap_exist = true;
1958
1959
1960         if (info_element->len >= 3 &&
1961             info_element->data[0] == 0x00 &&
1962             info_element->data[1] == 0x0a &&
1963             info_element->data[2] == 0xf5)
1964                 network->airgo_cap_exist = true;
1965
1966         if (info_element->len > 4 &&
1967             info_element->data[0] == 0x00 &&
1968             info_element->data[1] == 0x40 &&
1969             info_element->data[2] == 0x96 &&
1970             info_element->data[3] == 0x01) {
1971                 if (info_element->len == 6) {
1972                         memcpy(network->CcxRmState, &info_element[4], 2);
1973                         if (network->CcxRmState[0] != 0)
1974                                 network->bCcxRmEnable = true;
1975                         else
1976                                 network->bCcxRmEnable = false;
1977                         network->MBssidMask = network->CcxRmState[1] & 0x07;
1978                         if (network->MBssidMask != 0) {
1979                                 network->bMBssidValid = true;
1980                                 network->MBssidMask = 0xff <<
1981                                                       (network->MBssidMask);
1982                                 ether_addr_copy(network->MBssid,
1983                                                 network->bssid);
1984                                 network->MBssid[5] &= network->MBssidMask;
1985                         } else {
1986                                 network->bMBssidValid = false;
1987                         }
1988                 } else {
1989                         network->bCcxRmEnable = false;
1990                 }
1991         }
1992         if (info_element->len > 4  &&
1993             info_element->data[0] == 0x00 &&
1994             info_element->data[1] == 0x40 &&
1995             info_element->data[2] == 0x96 &&
1996             info_element->data[3] == 0x03) {
1997                 if (info_element->len == 5) {
1998                         network->bWithCcxVerNum = true;
1999                         network->BssCcxVerNumber = info_element->data[4];
2000                 } else {
2001                         network->bWithCcxVerNum = false;
2002                         network->BssCcxVerNumber = 0;
2003                 }
2004         }
2005         if (info_element->len > 4  &&
2006             info_element->data[0] == 0x00 &&
2007             info_element->data[1] == 0x50 &&
2008             info_element->data[2] == 0xf2 &&
2009             info_element->data[3] == 0x04) {
2010                 netdev_dbg(ieee->dev, "MFIE_TYPE_WZC: %d bytes\n",
2011                            info_element->len);
2012                 network->wzc_ie_len = min(info_element->len+2, MAX_WZC_IE_LEN);
2013                 memcpy(network->wzc_ie, info_element, network->wzc_ie_len);
2014         }
2015 }
2016
2017 static void rtllib_parse_mfie_ht_cap(struct rtllib_info_element *info_element,
2018                                      struct rtllib_network *network,
2019                                      u16 *tmp_htcap_len)
2020 {
2021         struct bss_ht *ht = &network->bssht;
2022
2023         *tmp_htcap_len = min_t(u8, info_element->len, MAX_IE_LEN);
2024         if (*tmp_htcap_len != 0) {
2025                 ht->bdHTSpecVer = HT_SPEC_VER_EWC;
2026                 ht->bdHTCapLen = min_t(u16, *tmp_htcap_len,
2027                                        sizeof(ht->bdHTCapBuf));
2028                 memcpy(ht->bdHTCapBuf, info_element->data, ht->bdHTCapLen);
2029
2030                 ht->bdSupportHT = true;
2031                 ht->bdHT1R = ((((struct ht_capab_ele *)
2032                                 ht->bdHTCapBuf))->MCS[1]) == 0;
2033
2034                 ht->bdBandWidth = (enum ht_channel_width)
2035                                              (((struct ht_capab_ele *)
2036                                              (ht->bdHTCapBuf))->ChlWidth);
2037         } else {
2038                 ht->bdSupportHT = false;
2039                 ht->bdHT1R = false;
2040                 ht->bdBandWidth = HT_CHANNEL_WIDTH_20;
2041         }
2042 }
2043
2044 int rtllib_parse_info_param(struct rtllib_device *ieee,
2045                 struct rtllib_info_element *info_element,
2046                 u16 length,
2047                 struct rtllib_network *network,
2048                 struct rtllib_rx_stats *stats)
2049 {
2050         u8 i;
2051         short offset;
2052         u16     tmp_htcap_len = 0;
2053         u16     tmp_htinfo_len = 0;
2054         char rates_str[64];
2055         char *p;
2056
2057         while (length >= sizeof(*info_element)) {
2058                 if (sizeof(*info_element) + info_element->len > length) {
2059                         netdev_dbg(ieee->dev,
2060                                    "Info elem: parse failed: info_element->len + 2 > left : info_element->len+2=%zd left=%d, id=%d.\n",
2061                                    info_element->len + sizeof(*info_element),
2062                                    length, info_element->id);
2063                         /* We stop processing but don't return an error here
2064                          * because some misbehaviour APs break this rule. ie.
2065                          * Orinoco AP1000.
2066                          */
2067                         break;
2068                 }
2069
2070                 switch (info_element->id) {
2071                 case MFIE_TYPE_SSID:
2072                         if (rtllib_is_empty_essid(info_element->data,
2073                                                      info_element->len)) {
2074                                 network->flags |= NETWORK_EMPTY_ESSID;
2075                                 break;
2076                         }
2077
2078                         network->ssid_len = min(info_element->len,
2079                                                 (u8) IW_ESSID_MAX_SIZE);
2080                         memcpy(network->ssid, info_element->data,
2081                                network->ssid_len);
2082                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
2083                                 memset(network->ssid + network->ssid_len, 0,
2084                                        IW_ESSID_MAX_SIZE - network->ssid_len);
2085
2086                         netdev_dbg(ieee->dev, "MFIE_TYPE_SSID: '%s' len=%d.\n",
2087                                    network->ssid, network->ssid_len);
2088                         break;
2089
2090                 case MFIE_TYPE_RATES:
2091                         p = rates_str;
2092                         network->rates_len = min(info_element->len,
2093                                                  MAX_RATES_LENGTH);
2094                         for (i = 0; i < network->rates_len; i++) {
2095                                 network->rates[i] = info_element->data[i];
2096                                 p += snprintf(p, sizeof(rates_str) -
2097                                               (p - rates_str), "%02X ",
2098                                               network->rates[i]);
2099                                 if (rtllib_is_ofdm_rate
2100                                     (info_element->data[i])) {
2101                                         network->flags |= NETWORK_HAS_OFDM;
2102                                         if (info_element->data[i] &
2103                                             RTLLIB_BASIC_RATE_MASK)
2104                                                 network->flags &=
2105                                                     ~NETWORK_HAS_CCK;
2106                                 }
2107
2108                                 if (rtllib_is_cck_rate
2109                                     (info_element->data[i])) {
2110                                         network->flags |= NETWORK_HAS_CCK;
2111                                 }
2112                         }
2113
2114                         netdev_dbg(ieee->dev, "MFIE_TYPE_RATES: '%s' (%d)\n",
2115                                    rates_str, network->rates_len);
2116                         break;
2117
2118                 case MFIE_TYPE_RATES_EX:
2119                         p = rates_str;
2120                         network->rates_ex_len = min(info_element->len,
2121                                                     MAX_RATES_EX_LENGTH);
2122                         for (i = 0; i < network->rates_ex_len; i++) {
2123                                 network->rates_ex[i] = info_element->data[i];
2124                                 p += snprintf(p, sizeof(rates_str) -
2125                                               (p - rates_str), "%02X ",
2126                                               network->rates_ex[i]);
2127                                 if (rtllib_is_ofdm_rate
2128                                     (info_element->data[i])) {
2129                                         network->flags |= NETWORK_HAS_OFDM;
2130                                         if (info_element->data[i] &
2131                                             RTLLIB_BASIC_RATE_MASK)
2132                                                 network->flags &=
2133                                                     ~NETWORK_HAS_CCK;
2134                                 }
2135                         }
2136
2137                         netdev_dbg(ieee->dev, "MFIE_TYPE_RATES_EX: '%s' (%d)\n",
2138                                    rates_str, network->rates_ex_len);
2139                         break;
2140
2141                 case MFIE_TYPE_DS_SET:
2142                         netdev_dbg(ieee->dev, "MFIE_TYPE_DS_SET: %d\n",
2143                                    info_element->data[0]);
2144                         network->channel = info_element->data[0];
2145                         break;
2146
2147                 case MFIE_TYPE_FH_SET:
2148                         netdev_dbg(ieee->dev, "MFIE_TYPE_FH_SET: ignored\n");
2149                         break;
2150
2151                 case MFIE_TYPE_CF_SET:
2152                         netdev_dbg(ieee->dev, "MFIE_TYPE_CF_SET: ignored\n");
2153                         break;
2154
2155                 case MFIE_TYPE_TIM:
2156                         if (info_element->len < 4)
2157                                 break;
2158
2159                         network->tim.tim_count = info_element->data[0];
2160                         network->tim.tim_period = info_element->data[1];
2161
2162                         network->dtim_period = info_element->data[1];
2163                         if (ieee->state != RTLLIB_LINKED)
2164                                 break;
2165                         network->last_dtim_sta_time = jiffies;
2166
2167                         network->dtim_data = RTLLIB_DTIM_VALID;
2168
2169
2170                         if (info_element->data[2] & 1)
2171                                 network->dtim_data |= RTLLIB_DTIM_MBCAST;
2172
2173                         offset = (info_element->data[2] >> 1)*2;
2174
2175
2176                         if (ieee->assoc_id < 8*offset ||
2177                             ieee->assoc_id > 8*(offset + info_element->len - 3))
2178                                 break;
2179
2180                         offset = (ieee->assoc_id / 8) - offset;
2181                         if (info_element->data[3 + offset] &
2182                            (1 << (ieee->assoc_id % 8)))
2183                                 network->dtim_data |= RTLLIB_DTIM_UCAST;
2184
2185                         network->listen_interval = network->dtim_period;
2186                         break;
2187
2188                 case MFIE_TYPE_ERP:
2189                         network->erp_value = info_element->data[0];
2190                         network->flags |= NETWORK_HAS_ERP_VALUE;
2191                         netdev_dbg(ieee->dev, "MFIE_TYPE_ERP_SET: %d\n",
2192                                    network->erp_value);
2193                         break;
2194                 case MFIE_TYPE_IBSS_SET:
2195                         network->atim_window = info_element->data[0];
2196                         netdev_dbg(ieee->dev, "MFIE_TYPE_IBSS_SET: %d\n",
2197                                    network->atim_window);
2198                         break;
2199
2200                 case MFIE_TYPE_CHALLENGE:
2201                         netdev_dbg(ieee->dev, "MFIE_TYPE_CHALLENGE: ignored\n");
2202                         break;
2203
2204                 case MFIE_TYPE_GENERIC:
2205                         netdev_dbg(ieee->dev, "MFIE_TYPE_GENERIC: %d bytes\n",
2206                                    info_element->len);
2207
2208                         rtllib_parse_mife_generic(ieee, info_element, network,
2209                                                   &tmp_htcap_len,
2210                                                   &tmp_htinfo_len);
2211                         break;
2212
2213                 case MFIE_TYPE_RSN:
2214                         netdev_dbg(ieee->dev, "MFIE_TYPE_RSN: %d bytes\n",
2215                                    info_element->len);
2216                         network->rsn_ie_len = min(info_element->len + 2,
2217                                                   MAX_WPA_IE_LEN);
2218                         memcpy(network->rsn_ie, info_element,
2219                                network->rsn_ie_len);
2220                         break;
2221
2222                 case MFIE_TYPE_HT_CAP:
2223                         netdev_dbg(ieee->dev, "MFIE_TYPE_HT_CAP: %d bytes\n",
2224                                    info_element->len);
2225
2226                         rtllib_parse_mfie_ht_cap(info_element, network,
2227                                                  &tmp_htcap_len);
2228                         break;
2229
2230
2231                 case MFIE_TYPE_HT_INFO:
2232                         netdev_dbg(ieee->dev, "MFIE_TYPE_HT_INFO: %d bytes\n",
2233                                    info_element->len);
2234                         tmp_htinfo_len = min_t(u8, info_element->len,
2235                                                MAX_IE_LEN);
2236                         if (tmp_htinfo_len) {
2237                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
2238                                 network->bssht.bdHTInfoLen = tmp_htinfo_len >
2239                                         sizeof(network->bssht.bdHTInfoBuf) ?
2240                                         sizeof(network->bssht.bdHTInfoBuf) :
2241                                         tmp_htinfo_len;
2242                                 memcpy(network->bssht.bdHTInfoBuf,
2243                                        info_element->data,
2244                                        network->bssht.bdHTInfoLen);
2245                         }
2246                         break;
2247
2248                 case MFIE_TYPE_AIRONET:
2249                         netdev_dbg(ieee->dev, "MFIE_TYPE_AIRONET: %d bytes\n",
2250                                    info_element->len);
2251                         if (info_element->len > IE_CISCO_FLAG_POSITION) {
2252                                 network->bWithAironetIE = true;
2253
2254                                 if ((info_element->data[IE_CISCO_FLAG_POSITION]
2255                                      & SUPPORT_CKIP_MIC) ||
2256                                      (info_element->data[IE_CISCO_FLAG_POSITION]
2257                                      & SUPPORT_CKIP_PK))
2258                                         network->bCkipSupported = true;
2259                                 else
2260                                         network->bCkipSupported = false;
2261                         } else {
2262                                 network->bWithAironetIE = false;
2263                                 network->bCkipSupported = false;
2264                         }
2265                         break;
2266                 case MFIE_TYPE_QOS_PARAMETER:
2267                         netdev_err(ieee->dev,
2268                                    "QoS Error need to parse QOS_PARAMETER IE\n");
2269                         break;
2270
2271                 case MFIE_TYPE_COUNTRY:
2272                         netdev_dbg(ieee->dev, "MFIE_TYPE_COUNTRY: %d bytes\n",
2273                                    info_element->len);
2274                         rtllib_extract_country_ie(ieee, info_element, network,
2275                                                   network->bssid);
2276                         break;
2277 /* TODO */
2278                 default:
2279                         netdev_dbg(ieee->dev,
2280                                    "Unsupported info element: %s (%d)\n",
2281                                    get_info_element_string(info_element->id),
2282                                    info_element->id);
2283                         break;
2284                 }
2285
2286                 length -= sizeof(*info_element) + info_element->len;
2287                 info_element =
2288                     (struct rtllib_info_element *)&info_element->
2289                     data[info_element->len];
2290         }
2291
2292         if (!network->atheros_cap_exist && !network->broadcom_cap_exist &&
2293             !network->cisco_cap_exist && !network->ralink_cap_exist &&
2294             !network->bssht.bdRT2RTAggregation)
2295                 network->unknown_cap_exist = true;
2296         else
2297                 network->unknown_cap_exist = false;
2298         return 0;
2299 }
2300
2301 static long rtllib_translate_todbm(u8 signal_strength_index)
2302 {
2303         long    signal_power;
2304
2305         signal_power = (long)((signal_strength_index + 1) >> 1);
2306         signal_power -= 95;
2307
2308         return signal_power;
2309 }
2310
2311 static inline int rtllib_network_init(
2312         struct rtllib_device *ieee,
2313         struct rtllib_probe_response *beacon,
2314         struct rtllib_network *network,
2315         struct rtllib_rx_stats *stats)
2316 {
2317         memset(&network->qos_data, 0, sizeof(struct rtllib_qos_data));
2318
2319         /* Pull out fixed field data */
2320         ether_addr_copy(network->bssid, beacon->header.addr3);
2321         network->capability = le16_to_cpu(beacon->capability);
2322         network->last_scanned = jiffies;
2323         network->time_stamp[0] = beacon->time_stamp[0];
2324         network->time_stamp[1] = beacon->time_stamp[1];
2325         network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
2326         /* Where to pull this? beacon->listen_interval;*/
2327         network->listen_interval = 0x0A;
2328         network->rates_len = network->rates_ex_len = 0;
2329         network->last_associate = 0;
2330         network->ssid_len = 0;
2331         network->hidden_ssid_len = 0;
2332         memset(network->hidden_ssid, 0, sizeof(network->hidden_ssid));
2333         network->flags = 0;
2334         network->atim_window = 0;
2335         network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
2336             0x3 : 0x0;
2337         network->berp_info_valid = false;
2338         network->broadcom_cap_exist = false;
2339         network->ralink_cap_exist = false;
2340         network->atheros_cap_exist = false;
2341         network->cisco_cap_exist = false;
2342         network->unknown_cap_exist = false;
2343         network->realtek_cap_exit = false;
2344         network->marvell_cap_exist = false;
2345         network->airgo_cap_exist = false;
2346         network->Turbo_Enable = 0;
2347         network->SignalStrength = stats->SignalStrength;
2348         network->RSSI = stats->SignalStrength;
2349         network->CountryIeLen = 0;
2350         memset(network->CountryIeBuf, 0, MAX_IE_LEN);
2351         HTInitializeBssDesc(&network->bssht);
2352         if (stats->freq == RTLLIB_52GHZ_BAND) {
2353                 /* for A band (No DS info) */
2354                 network->channel = stats->received_channel;
2355         } else
2356                 network->flags |= NETWORK_HAS_CCK;
2357
2358         network->wpa_ie_len = 0;
2359         network->rsn_ie_len = 0;
2360         network->wzc_ie_len = 0;
2361
2362         if (rtllib_parse_info_param(ieee,
2363                         beacon->info_element,
2364                         (stats->len - sizeof(*beacon)),
2365                         network,
2366                         stats))
2367                 return 1;
2368
2369         network->mode = 0;
2370         if (stats->freq == RTLLIB_52GHZ_BAND)
2371                 network->mode = IEEE_A;
2372         else {
2373                 if (network->flags & NETWORK_HAS_OFDM)
2374                         network->mode |= IEEE_G;
2375                 if (network->flags & NETWORK_HAS_CCK)
2376                         network->mode |= IEEE_B;
2377         }
2378
2379         if (network->mode == 0) {
2380                 netdev_dbg(ieee->dev, "Filtered out '%s (%pM)' network.\n",
2381                            escape_essid(network->ssid, network->ssid_len),
2382                            network->bssid);
2383                 return 1;
2384         }
2385
2386         if (network->bssht.bdSupportHT) {
2387                 if (network->mode == IEEE_A)
2388                         network->mode = IEEE_N_5G;
2389                 else if (network->mode & (IEEE_G | IEEE_B))
2390                         network->mode = IEEE_N_24G;
2391         }
2392         if (rtllib_is_empty_essid(network->ssid, network->ssid_len))
2393                 network->flags |= NETWORK_EMPTY_ESSID;
2394         stats->signal = 30 + (stats->SignalStrength * 70) / 100;
2395         stats->noise = rtllib_translate_todbm((u8)(100-stats->signal)) - 25;
2396
2397         memcpy(&network->stats, stats, sizeof(network->stats));
2398
2399         return 0;
2400 }
2401
2402 static inline int is_same_network(struct rtllib_network *src,
2403                                   struct rtllib_network *dst, u8 ssidbroad)
2404 {
2405         /* A network is only a duplicate if the channel, BSSID, ESSID
2406          * and the capability field (in particular IBSS and BSS) all match.
2407          * We treat all <hidden> with the same BSSID and channel
2408          * as one network
2409          */
2410         return (((src->ssid_len == dst->ssid_len) || (!ssidbroad)) &&
2411                 (src->channel == dst->channel) &&
2412                 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
2413                 (!memcmp(src->ssid, dst->ssid, src->ssid_len) ||
2414                 (!ssidbroad)) &&
2415                 ((src->capability & WLAN_CAPABILITY_IBSS) ==
2416                 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
2417                 ((src->capability & WLAN_CAPABILITY_ESS) ==
2418                 (dst->capability & WLAN_CAPABILITY_ESS)));
2419 }
2420
2421
2422 static inline void update_network(struct rtllib_device *ieee,
2423                                   struct rtllib_network *dst,
2424                                   struct rtllib_network *src)
2425 {
2426         int qos_active;
2427         u8 old_param;
2428
2429         memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats));
2430         dst->capability = src->capability;
2431         memcpy(dst->rates, src->rates, src->rates_len);
2432         dst->rates_len = src->rates_len;
2433         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
2434         dst->rates_ex_len = src->rates_ex_len;
2435         if (src->ssid_len > 0) {
2436                 if (dst->ssid_len == 0) {
2437                         memset(dst->hidden_ssid, 0, sizeof(dst->hidden_ssid));
2438                         dst->hidden_ssid_len = src->ssid_len;
2439                         memcpy(dst->hidden_ssid, src->ssid, src->ssid_len);
2440                 } else {
2441                         memset(dst->ssid, 0, dst->ssid_len);
2442                         dst->ssid_len = src->ssid_len;
2443                         memcpy(dst->ssid, src->ssid, src->ssid_len);
2444                 }
2445         }
2446         dst->mode = src->mode;
2447         dst->flags = src->flags;
2448         dst->time_stamp[0] = src->time_stamp[0];
2449         dst->time_stamp[1] = src->time_stamp[1];
2450         if (src->flags & NETWORK_HAS_ERP_VALUE) {
2451                 dst->erp_value = src->erp_value;
2452                 dst->berp_info_valid = src->berp_info_valid = true;
2453         }
2454         dst->beacon_interval = src->beacon_interval;
2455         dst->listen_interval = src->listen_interval;
2456         dst->atim_window = src->atim_window;
2457         dst->dtim_period = src->dtim_period;
2458         dst->dtim_data = src->dtim_data;
2459         dst->last_dtim_sta_time = src->last_dtim_sta_time;
2460         memcpy(&dst->tim, &src->tim, sizeof(struct rtllib_tim_parameters));
2461
2462         dst->bssht.bdSupportHT = src->bssht.bdSupportHT;
2463         dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation;
2464         dst->bssht.bdHTCapLen = src->bssht.bdHTCapLen;
2465         memcpy(dst->bssht.bdHTCapBuf, src->bssht.bdHTCapBuf,
2466                src->bssht.bdHTCapLen);
2467         dst->bssht.bdHTInfoLen = src->bssht.bdHTInfoLen;
2468         memcpy(dst->bssht.bdHTInfoBuf, src->bssht.bdHTInfoBuf,
2469                src->bssht.bdHTInfoLen);
2470         dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer;
2471         dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime;
2472         dst->broadcom_cap_exist = src->broadcom_cap_exist;
2473         dst->ralink_cap_exist = src->ralink_cap_exist;
2474         dst->atheros_cap_exist = src->atheros_cap_exist;
2475         dst->realtek_cap_exit = src->realtek_cap_exit;
2476         dst->marvell_cap_exist = src->marvell_cap_exist;
2477         dst->cisco_cap_exist = src->cisco_cap_exist;
2478         dst->airgo_cap_exist = src->airgo_cap_exist;
2479         dst->unknown_cap_exist = src->unknown_cap_exist;
2480         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
2481         dst->wpa_ie_len = src->wpa_ie_len;
2482         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
2483         dst->rsn_ie_len = src->rsn_ie_len;
2484         memcpy(dst->wzc_ie, src->wzc_ie, src->wzc_ie_len);
2485         dst->wzc_ie_len = src->wzc_ie_len;
2486
2487         dst->last_scanned = jiffies;
2488         /* qos related parameters */
2489         qos_active = dst->qos_data.active;
2490         old_param = dst->qos_data.param_count;
2491         dst->qos_data.supported = src->qos_data.supported;
2492         if (dst->flags & NETWORK_HAS_QOS_PARAMETERS)
2493                 memcpy(&dst->qos_data, &src->qos_data,
2494                        sizeof(struct rtllib_qos_data));
2495         if (dst->qos_data.supported == 1) {
2496                 if (dst->ssid_len)
2497                         netdev_dbg(ieee->dev,
2498                                    "QoS the network %s is QoS supported\n",
2499                                    dst->ssid);
2500                 else
2501                         netdev_dbg(ieee->dev,
2502                                    "QoS the network is QoS supported\n");
2503         }
2504         dst->qos_data.active = qos_active;
2505         dst->qos_data.old_param_count = old_param;
2506
2507         /* dst->last_associate is not overwritten */
2508         dst->wmm_info = src->wmm_info;
2509         if (src->wmm_param[0].ac_aci_acm_aifsn ||
2510            src->wmm_param[1].ac_aci_acm_aifsn ||
2511            src->wmm_param[2].ac_aci_acm_aifsn ||
2512            src->wmm_param[3].ac_aci_acm_aifsn)
2513                 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
2514
2515         dst->SignalStrength = src->SignalStrength;
2516         dst->RSSI = src->RSSI;
2517         dst->Turbo_Enable = src->Turbo_Enable;
2518
2519         dst->CountryIeLen = src->CountryIeLen;
2520         memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
2521
2522         dst->bWithAironetIE = src->bWithAironetIE;
2523         dst->bCkipSupported = src->bCkipSupported;
2524         memcpy(dst->CcxRmState, src->CcxRmState, 2);
2525         dst->bCcxRmEnable = src->bCcxRmEnable;
2526         dst->MBssidMask = src->MBssidMask;
2527         dst->bMBssidValid = src->bMBssidValid;
2528         memcpy(dst->MBssid, src->MBssid, 6);
2529         dst->bWithCcxVerNum = src->bWithCcxVerNum;
2530         dst->BssCcxVerNumber = src->BssCcxVerNumber;
2531 }
2532
2533 static inline int is_beacon(u16 fc)
2534 {
2535         return (WLAN_FC_GET_STYPE(fc) == RTLLIB_STYPE_BEACON);
2536 }
2537
2538 static int IsPassiveChannel(struct rtllib_device *rtllib, u8 channel)
2539 {
2540         if (MAX_CHANNEL_NUMBER < channel) {
2541                 netdev_info(rtllib->dev, "%s(): Invalid Channel\n", __func__);
2542                 return 0;
2543         }
2544
2545         if (rtllib->active_channel_map[channel] == 2)
2546                 return 1;
2547
2548         return 0;
2549 }
2550
2551 int rtllib_legal_channel(struct rtllib_device *rtllib, u8 channel)
2552 {
2553         if (MAX_CHANNEL_NUMBER < channel) {
2554                 netdev_info(rtllib->dev, "%s(): Invalid Channel\n", __func__);
2555                 return 0;
2556         }
2557         if (rtllib->active_channel_map[channel] > 0)
2558                 return 1;
2559
2560         return 0;
2561 }
2562 EXPORT_SYMBOL(rtllib_legal_channel);
2563
2564 static inline void rtllib_process_probe_response(
2565         struct rtllib_device *ieee,
2566         struct rtllib_probe_response *beacon,
2567         struct rtllib_rx_stats *stats)
2568 {
2569         struct rtllib_network *target;
2570         struct rtllib_network *oldest = NULL;
2571         struct rtllib_info_element *info_element = &beacon->info_element[0];
2572         unsigned long flags;
2573         short renew;
2574         struct rtllib_network *network = kzalloc(sizeof(struct rtllib_network),
2575                                                  GFP_ATOMIC);
2576         u16 frame_ctl = le16_to_cpu(beacon->header.frame_ctl);
2577
2578         if (!network)
2579                 return;
2580
2581         netdev_dbg(ieee->dev,
2582                    "'%s' ( %pM ): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
2583                    escape_essid(info_element->data, info_element->len),
2584                    beacon->header.addr3,
2585                    (le16_to_cpu(beacon->capability) & (1<<0xf)) ? '1' : '0',
2586                    (le16_to_cpu(beacon->capability) & (1<<0xe)) ? '1' : '0',
2587                    (le16_to_cpu(beacon->capability) & (1<<0xd)) ? '1' : '0',
2588                    (le16_to_cpu(beacon->capability) & (1<<0xc)) ? '1' : '0',
2589                    (le16_to_cpu(beacon->capability) & (1<<0xb)) ? '1' : '0',
2590                    (le16_to_cpu(beacon->capability) & (1<<0xa)) ? '1' : '0',
2591                    (le16_to_cpu(beacon->capability) & (1<<0x9)) ? '1' : '0',
2592                    (le16_to_cpu(beacon->capability) & (1<<0x8)) ? '1' : '0',
2593                    (le16_to_cpu(beacon->capability) & (1<<0x7)) ? '1' : '0',
2594                    (le16_to_cpu(beacon->capability) & (1<<0x6)) ? '1' : '0',
2595                    (le16_to_cpu(beacon->capability) & (1<<0x5)) ? '1' : '0',
2596                    (le16_to_cpu(beacon->capability) & (1<<0x4)) ? '1' : '0',
2597                    (le16_to_cpu(beacon->capability) & (1<<0x3)) ? '1' : '0',
2598                    (le16_to_cpu(beacon->capability) & (1<<0x2)) ? '1' : '0',
2599                    (le16_to_cpu(beacon->capability) & (1<<0x1)) ? '1' : '0',
2600                    (le16_to_cpu(beacon->capability) & (1<<0x0)) ? '1' : '0');
2601
2602         if (rtllib_network_init(ieee, beacon, network, stats)) {
2603                 netdev_dbg(ieee->dev, "Dropped '%s' ( %pM) via %s.\n",
2604                            escape_essid(info_element->data, info_element->len),
2605                            beacon->header.addr3,
2606                            is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE");
2607                 goto free_network;
2608         }
2609
2610
2611         if (!rtllib_legal_channel(ieee, network->channel))
2612                 goto free_network;
2613
2614         if (WLAN_FC_GET_STYPE(frame_ctl) == RTLLIB_STYPE_PROBE_RESP) {
2615                 if (IsPassiveChannel(ieee, network->channel)) {
2616                         netdev_info(ieee->dev,
2617                                     "GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n",
2618                                     network->channel);
2619                         goto free_network;
2620                 }
2621         }
2622
2623         /* The network parsed correctly -- so now we scan our known networks
2624          * to see if we can find it in our list.
2625          *
2626          * NOTE:  This search is definitely not optimized.  Once its doing
2627          *      the "right thing" we'll optimize it for efficiency if
2628          *      necessary
2629          */
2630
2631         /* Search for this entry in the list and update it if it is
2632          * already there.
2633          */
2634
2635         spin_lock_irqsave(&ieee->lock, flags);
2636         if (is_same_network(&ieee->current_network, network,
2637            (network->ssid_len ? 1 : 0))) {
2638                 update_network(ieee, &ieee->current_network, network);
2639                 if ((ieee->current_network.mode == IEEE_N_24G ||
2640                      ieee->current_network.mode == IEEE_G)
2641                      && ieee->current_network.berp_info_valid) {
2642                         if (ieee->current_network.erp_value & ERP_UseProtection)
2643                                 ieee->current_network.buseprotection = true;
2644                         else
2645                                 ieee->current_network.buseprotection = false;
2646                 }
2647                 if (is_beacon(frame_ctl)) {
2648                         if (ieee->state >= RTLLIB_LINKED)
2649                                 ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
2650                 }
2651         }
2652         list_for_each_entry(target, &ieee->network_list, list) {
2653                 if (is_same_network(target, network,
2654                    (target->ssid_len ? 1 : 0)))
2655                         break;
2656                 if ((oldest == NULL) ||
2657                     (target->last_scanned < oldest->last_scanned))
2658                         oldest = target;
2659         }
2660
2661         /* If we didn't find a match, then get a new network slot to initialize
2662          * with this beacon's information
2663          */
2664         if (&target->list == &ieee->network_list) {
2665                 if (list_empty(&ieee->network_free_list)) {
2666                         /* If there are no more slots, expire the oldest */
2667                         list_del(&oldest->list);
2668                         target = oldest;
2669                         netdev_dbg(ieee->dev,
2670                                    "Expired '%s' ( %pM) from network list.\n",
2671                                    escape_essid(target->ssid, target->ssid_len),
2672                                    target->bssid);
2673                 } else {
2674                         /* Otherwise just pull from the free list */
2675                         target = list_entry(ieee->network_free_list.next,
2676                                             struct rtllib_network, list);
2677                         list_del(ieee->network_free_list.next);
2678                 }
2679
2680                 netdev_dbg(ieee->dev, "Adding '%s' ( %pM) via %s.\n",
2681                            escape_essid(network->ssid, network->ssid_len),
2682                            network->bssid,
2683                            is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE");
2684
2685                 memcpy(target, network, sizeof(*target));
2686                 list_add_tail(&target->list, &ieee->network_list);
2687                 if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
2688                         rtllib_softmac_new_net(ieee, network);
2689         } else {
2690                 netdev_dbg(ieee->dev, "Updating '%s' ( %pM) via %s.\n",
2691                            escape_essid(target->ssid, target->ssid_len),
2692                            target->bssid,
2693                            is_beacon(frame_ctl) ? "BEACON" : "PROBE RESPONSE");
2694
2695                 /* we have an entry and we are going to update it. But this
2696                  *  entry may be already expired. In this case we do the same
2697                  * as we found a new net and call the new_net handler
2698                  */
2699                 renew = !time_after(target->last_scanned + ieee->scan_age,
2700                                     jiffies);
2701                 if ((!target->ssid_len) &&
2702                     (((network->ssid_len > 0) && (target->hidden_ssid_len == 0))
2703                     || ((ieee->current_network.ssid_len == network->ssid_len) &&
2704                     (strncmp(ieee->current_network.ssid, network->ssid,
2705                     network->ssid_len) == 0) &&
2706                     (ieee->state == RTLLIB_NOLINK))))
2707                         renew = 1;
2708                 update_network(ieee, target, network);
2709                 if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
2710                         rtllib_softmac_new_net(ieee, network);
2711         }
2712
2713         spin_unlock_irqrestore(&ieee->lock, flags);
2714         if (is_beacon(frame_ctl) &&
2715             is_same_network(&ieee->current_network, network,
2716             (network->ssid_len ? 1 : 0)) &&
2717             (ieee->state == RTLLIB_LINKED)) {
2718                 if (ieee->handle_beacon != NULL)
2719                         ieee->handle_beacon(ieee->dev, beacon,
2720                                             &ieee->current_network);
2721         }
2722 free_network:
2723         kfree(network);
2724 }
2725
2726 void rtllib_rx_mgt(struct rtllib_device *ieee,
2727                       struct sk_buff *skb,
2728                       struct rtllib_rx_stats *stats)
2729 {
2730         struct rtllib_hdr_4addr *header = (struct rtllib_hdr_4addr *)skb->data;
2731
2732         if ((WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) !=
2733             RTLLIB_STYPE_PROBE_RESP) &&
2734             (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) !=
2735             RTLLIB_STYPE_BEACON))
2736                 ieee->last_rx_ps_time = jiffies;
2737
2738         switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
2739
2740         case RTLLIB_STYPE_BEACON:
2741                 netdev_dbg(ieee->dev, "received BEACON (%d)\n",
2742                            WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2743                 rtllib_process_probe_response(
2744                                 ieee, (struct rtllib_probe_response *)header,
2745                                 stats);
2746
2747                 if (ieee->sta_sleep || (ieee->ps != RTLLIB_PS_DISABLED &&
2748                     ieee->iw_mode == IW_MODE_INFRA &&
2749                     ieee->state == RTLLIB_LINKED))
2750                         tasklet_schedule(&ieee->ps_task);
2751
2752                 break;
2753
2754         case RTLLIB_STYPE_PROBE_RESP:
2755                 netdev_dbg(ieee->dev, "received PROBE RESPONSE (%d)\n",
2756                            WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2757                 rtllib_process_probe_response(ieee,
2758                               (struct rtllib_probe_response *)header, stats);
2759                 break;
2760         case RTLLIB_STYPE_PROBE_REQ:
2761                 netdev_dbg(ieee->dev, "received PROBE RESQUEST (%d)\n",
2762                            WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2763                 if ((ieee->softmac_features & IEEE_SOFTMAC_PROBERS) &&
2764                     ((ieee->iw_mode == IW_MODE_ADHOC ||
2765                     ieee->iw_mode == IW_MODE_MASTER) &&
2766                     ieee->state == RTLLIB_LINKED))
2767                         rtllib_rx_probe_rq(ieee, skb);
2768                 break;
2769         }
2770 }