drivers/staging/rtl8188eu/core/rtw_recv.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  12  * more details.
  13  *
  14  ******************************************************************************/
  15 #define _RTW_RECV_C_
  16
  17 #include <linux/ieee80211.h>
  18
  19 #include <osdep_service.h>
  20 #include <drv_types.h>
  21 #include <recv_osdep.h>
  22 #include <mlme_osdep.h>
  23 #include <mon.h>
  24 #include <wifi.h>
  25 #include <linux/vmalloc.h>
  26
  27 #define ETHERNET_HEADER_SIZE    14      /*  Ethernet Header Length */
  28 #define LLC_HEADER_SIZE                 6       /*  LLC Header Length */
  29
  30 static u8 SNAP_ETH_TYPE_IPX[2] = {0x81, 0x37};
  31 static u8 SNAP_ETH_TYPE_APPLETALK_AARP[2] = {0x80, 0xf3};
  32
  33 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
  34 static u8 rtw_bridge_tunnel_header[] = {
  35        0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8
  36 };
  37
  38 static u8 rtw_rfc1042_header[] = {
  39        0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00
  40 };
  41
  42 static void rtw_signal_stat_timer_hdl(unsigned long data);
  43
  44 void _rtw_init_sta_recv_priv(struct sta_recv_priv *psta_recvpriv)
  45 {
  46
  47         memset((u8 *)psta_recvpriv, 0, sizeof(struct sta_recv_priv));
  48
  49         spin_lock_init(&psta_recvpriv->lock);
  50
  51         _rtw_init_queue(&psta_recvpriv->defrag_q);
  52
  53 }
  54
  55 int _rtw_init_recv_priv(struct recv_priv *precvpriv, struct adapter *padapter)
  56 {
  57         int i;
  58
  59         struct recv_frame *precvframe;
  60
  61         int     res = _SUCCESS;
  62
  63         _rtw_init_queue(&precvpriv->free_recv_queue);
  64         _rtw_init_queue(&precvpriv->recv_pending_queue);
  65         _rtw_init_queue(&precvpriv->uc_swdec_pending_queue);
  66
  67         precvpriv->adapter = padapter;
  68
  69         precvpriv->free_recvframe_cnt = NR_RECVFRAME;
  70
  71         precvpriv->pallocated_frame_buf = vzalloc(NR_RECVFRAME * sizeof(struct recv_frame) + RXFRAME_ALIGN_SZ);
  72
  73         if (!precvpriv->pallocated_frame_buf)
  74                 return _FAIL;
  75
  76         precvpriv->precv_frame_buf = PTR_ALIGN(precvpriv->pallocated_frame_buf, RXFRAME_ALIGN_SZ);
  77
  78         precvframe = (struct recv_frame *)precvpriv->precv_frame_buf;
  79
  80         for (i = 0; i < NR_RECVFRAME; i++) {
  81                 INIT_LIST_HEAD(&(precvframe->list));
  82
  83                 list_add_tail(&(precvframe->list),
  84                                      &(precvpriv->free_recv_queue.queue));
  85
  86                 rtw_os_recv_resource_alloc(precvframe);
  87
  88                 precvframe->len = 0;
  89
  90                 precvframe->adapter = padapter;
  91                 precvframe++;
  92         }
  93         precvpriv->rx_pending_cnt = 1;
  94
  95         res = rtw_hal_init_recv_priv(padapter);
  96
  97         setup_timer(&precvpriv->signal_stat_timer,
  98                     rtw_signal_stat_timer_hdl,
  99                     (unsigned long)padapter);
 100
 101         precvpriv->signal_stat_sampling_interval = 1000; /* ms */
 102
 103         rtw_set_signal_stat_timer(precvpriv);
 104
 105         return res;
 106 }
 107
 108 void _rtw_free_recv_priv(struct recv_priv *precvpriv)
 109 {
 110         struct adapter  *padapter = precvpriv->adapter;
 111
 112         rtw_free_uc_swdec_pending_queue(padapter);
 113
 114         vfree(precvpriv->pallocated_frame_buf);
 115
 116         rtw_hal_free_recv_priv(padapter);
 117
 118 }
 119
 120 struct recv_frame *_rtw_alloc_recvframe(struct __queue *pfree_recv_queue)
 121 {
 122         struct recv_frame *hdr;
 123         struct adapter *padapter;
 124         struct recv_priv *precvpriv;
 125
 126         hdr = list_first_entry_or_null(&pfree_recv_queue->queue,
 127                                        struct recv_frame, list);
 128         if (hdr) {
 129                 list_del_init(&hdr->list);
 130                 padapter = hdr->adapter;
 131                 if (padapter) {
 132                         precvpriv = &padapter->recvpriv;
 133                         if (pfree_recv_queue == &precvpriv->free_recv_queue)
 134                                 precvpriv->free_recvframe_cnt--;
 135                 }
 136         }
 137
 138         return hdr;
 139 }
 140
 141 struct recv_frame *rtw_alloc_recvframe(struct __queue *pfree_recv_queue)
 142 {
 143         struct recv_frame  *precvframe;
 144
 145         spin_lock_bh(&pfree_recv_queue->lock);
 146
 147         precvframe = _rtw_alloc_recvframe(pfree_recv_queue);
 148
 149         spin_unlock_bh(&pfree_recv_queue->lock);
 150
 151         return precvframe;
 152 }
 153
 154 int rtw_free_recvframe(struct recv_frame *precvframe,
 155                        struct __queue *pfree_recv_queue)
 156 {
 157         struct adapter *padapter;
 158         struct recv_priv *precvpriv;
 159
 160         if (!precvframe)
 161                 return _FAIL;
 162         padapter = precvframe->adapter;
 163         precvpriv = &padapter->recvpriv;
 164         if (precvframe->pkt) {
 165                 dev_kfree_skb_any(precvframe->pkt);/* free skb by driver */
 166                 precvframe->pkt = NULL;
 167         }
 168
 169         spin_lock_bh(&pfree_recv_queue->lock);
 170
 171         list_del_init(&(precvframe->list));
 172
 173         precvframe->len = 0;
 174
 175         list_add_tail(&(precvframe->list), get_list_head(pfree_recv_queue));
 176
 177         if (padapter != NULL) {
 178                 if (pfree_recv_queue == &precvpriv->free_recv_queue)
 179                                 precvpriv->free_recvframe_cnt++;
 180         }
 181
 182       spin_unlock_bh(&pfree_recv_queue->lock);
 183
 184         return _SUCCESS;
 185 }
 186
 187 int _rtw_enqueue_recvframe(struct recv_frame *precvframe, struct __queue *queue)
 188 {
 189         struct adapter *padapter = precvframe->adapter;
 190         struct recv_priv *precvpriv = &padapter->recvpriv;
 191
 192         list_del_init(&(precvframe->list));
 193         list_add_tail(&(precvframe->list), get_list_head(queue));
 194
 195         if (padapter != NULL) {
 196                 if (queue == &precvpriv->free_recv_queue)
 197                         precvpriv->free_recvframe_cnt++;
 198         }
 199
 200         return _SUCCESS;
 201 }
 202
 203 int rtw_enqueue_recvframe(struct recv_frame *precvframe, struct __queue *queue)
 204 {
 205         int ret;
 206
 207         spin_lock_bh(&queue->lock);
 208         ret = _rtw_enqueue_recvframe(precvframe, queue);
 209         spin_unlock_bh(&queue->lock);
 210
 211         return ret;
 212 }
 213
 214 /*
 215 caller : defrag ; recvframe_chk_defrag in recv_thread  (passive)
 216 pframequeue: defrag_queue : will be accessed in recv_thread  (passive)
 217
 218 using spinlock to protect
 219
 220 */
 221
 222 void rtw_free_recvframe_queue(struct __queue *pframequeue,  struct __queue *pfree_recv_queue)
 223 {
 224         struct recv_frame *hdr;
 225         struct list_head *plist, *phead;
 226
 227         spin_lock(&pframequeue->lock);
 228
 229         phead = get_list_head(pframequeue);
 230         plist = phead->next;
 231
 232         while (phead != plist) {
 233                 hdr = container_of(plist, struct recv_frame, list);
 234
 235                 plist = plist->next;
 236
 237                 rtw_free_recvframe(hdr, pfree_recv_queue);
 238         }
 239
 240         spin_unlock(&pframequeue->lock);
 241
 242 }
 243
 244 u32 rtw_free_uc_swdec_pending_queue(struct adapter *adapter)
 245 {
 246         u32 cnt = 0;
 247         struct recv_frame *pending_frame;
 248         while ((pending_frame = rtw_alloc_recvframe(&adapter->recvpriv.uc_swdec_pending_queue))) {
 249                 rtw_free_recvframe(pending_frame, &adapter->recvpriv.free_recv_queue);
 250                 DBG_88E("%s: dequeue uc_swdec_pending_queue\n", __func__);
 251                 cnt++;
 252         }
 253
 254         return cnt;
 255 }
 256
 257 static int recvframe_chkmic(struct adapter *adapter,
 258                             struct recv_frame *precvframe)
 259 {
 260         int     i, res = _SUCCESS;
 261         u32     datalen;
 262         u8      miccode[8];
 263         u8      bmic_err = false, brpt_micerror = true;
 264         u8      *pframe, *payload, *pframemic;
 265         u8      *mickey;
 266         struct  sta_info                *stainfo;
 267         struct  rx_pkt_attrib   *prxattrib = &precvframe->attrib;
 268         struct  security_priv   *psecuritypriv = &adapter->securitypriv;
 269
 270         struct mlme_ext_priv    *pmlmeext = &adapter->mlmeextpriv;
 271         struct mlme_ext_info    *pmlmeinfo = &(pmlmeext->mlmext_info);
 272
 273         stainfo = rtw_get_stainfo(&adapter->stapriv, &prxattrib->ta[0]);
 274
 275         if (prxattrib->encrypt == _TKIP_) {
 276                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n recvframe_chkmic:prxattrib->encrypt==_TKIP_\n"));
 277                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n recvframe_chkmic:da=0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n",
 278                          prxattrib->ra[0], prxattrib->ra[1], prxattrib->ra[2], prxattrib->ra[3], prxattrib->ra[4], prxattrib->ra[5]));
 279
 280                 /* calculate mic code */
 281                 if (stainfo != NULL) {
 282                         if (IS_MCAST(prxattrib->ra)) {
 283                                 if (!psecuritypriv) {
 284                                         res = _FAIL;
 285                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("\n recvframe_chkmic:didn't install group key!!!!!!!!!!\n"));
 286                                         DBG_88E("\n recvframe_chkmic:didn't install group key!!!!!!!!!!\n");
 287                                         goto exit;
 288                                 }
 289                                 mickey = &psecuritypriv->dot118021XGrprxmickey[prxattrib->key_index].skey[0];
 290
 291                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n recvframe_chkmic: bcmc key\n"));
 292                         } else {
 293                                 mickey = &stainfo->dot11tkiprxmickey.skey[0];
 294                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("\n recvframe_chkmic: unicast key\n"));
 295                         }
 296
 297                         /* icv_len included the mic code */
 298                         datalen = precvframe->len-prxattrib->hdrlen -
 299                                   prxattrib->iv_len-prxattrib->icv_len-8;
 300                         pframe = precvframe->rx_data;
 301                         payload = pframe+prxattrib->hdrlen+prxattrib->iv_len;
 302
 303                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n prxattrib->iv_len=%d prxattrib->icv_len=%d\n", prxattrib->iv_len, prxattrib->icv_len));
 304                         rtw_seccalctkipmic(mickey, pframe, payload, datalen, &miccode[0],
 305                                            (unsigned char)prxattrib->priority); /* care the length of the data */
 306
 307                         pframemic = payload+datalen;
 308
 309                         bmic_err = false;
 310
 311                         for (i = 0; i < 8; i++) {
 312                                 if (miccode[i] != *(pframemic+i)) {
 313                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
 314                                                  ("recvframe_chkmic:miccode[%d](%02x)!=*(pframemic+%d)(%02x) ",
 315                                                  i, miccode[i], i, *(pframemic+i)));
 316                                         bmic_err = true;
 317                                 }
 318                         }
 319
 320                         if (bmic_err) {
 321                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
 322                                          ("\n *(pframemic-8)-*(pframemic-1)=0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n",
 323                                          *(pframemic-8), *(pframemic-7), *(pframemic-6),
 324                                          *(pframemic-5), *(pframemic-4), *(pframemic-3),
 325                                          *(pframemic-2), *(pframemic-1)));
 326                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
 327                                          ("\n *(pframemic-16)-*(pframemic-9)=0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n",
 328                                          *(pframemic-16), *(pframemic-15), *(pframemic-14),
 329                                          *(pframemic-13), *(pframemic-12), *(pframemic-11),
 330                                          *(pframemic-10), *(pframemic-9)));
 331                                 {
 332                                         uint i;
 333                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
 334                                                  ("\n ======demp packet (len=%d)======\n",
 335                                                  precvframe->len));
 336                                         for (i = 0; i < precvframe->len; i += 8) {
 337                                                 RT_TRACE(_module_rtl871x_recv_c_,
 338                                                          _drv_err_,
 339                                                          ("0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x",
 340                                                          *(precvframe->rx_data+i),
 341                                                          *(precvframe->rx_data+i+1),
 342                                                          *(precvframe->rx_data+i+2),
 343                                                          *(precvframe->rx_data+i+3),
 344                                                          *(precvframe->rx_data+i+4),
 345                                                          *(precvframe->rx_data+i+5),
 346                                                          *(precvframe->rx_data+i+6),
 347                                                          *(precvframe->rx_data+i+7)));
 348                                         }
 349                                         RT_TRACE(_module_rtl871x_recv_c_,
 350                                                  _drv_err_,
 351                                                  ("\n ====== demp packet end [len=%d]======\n",
 352                                                  precvframe->len));
 353                                         RT_TRACE(_module_rtl871x_recv_c_,
 354                                                  _drv_err_,
 355                                                  ("\n hrdlen=%d,\n",
 356                                                  prxattrib->hdrlen));
 357                                 }
 358
 359                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
 360                                          ("ra=0x%.2x 0x%.2x 0x%.2x 0x%.2x 0x%.2x 0x%.2x psecuritypriv->binstallGrpkey=%d ",
 361                                          prxattrib->ra[0], prxattrib->ra[1], prxattrib->ra[2],
 362                                          prxattrib->ra[3], prxattrib->ra[4], prxattrib->ra[5], psecuritypriv->binstallGrpkey));
 363
 364                                 /*  double check key_index for some timing issue , */
 365                                 /*  cannot compare with psecuritypriv->dot118021XGrpKeyid also cause timing issue */
 366                                 if ((IS_MCAST(prxattrib->ra) == true)  && (prxattrib->key_index != pmlmeinfo->key_index))
 367                                         brpt_micerror = false;
 368
 369                                 if ((prxattrib->bdecrypted) && (brpt_micerror)) {
 370                                         rtw_handle_tkip_mic_err(adapter, (u8)IS_MCAST(prxattrib->ra));
 371                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" mic error :prxattrib->bdecrypted=%d ", prxattrib->bdecrypted));
 372                                         DBG_88E(" mic error :prxattrib->bdecrypted=%d\n", prxattrib->bdecrypted);
 373                                 } else {
 374                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" mic error :prxattrib->bdecrypted=%d ", prxattrib->bdecrypted));
 375                                         DBG_88E(" mic error :prxattrib->bdecrypted=%d\n", prxattrib->bdecrypted);
 376                                 }
 377                                 res = _FAIL;
 378                         } else {
 379                                 /* mic checked ok */
 380                                 if ((!psecuritypriv->bcheck_grpkey) && (IS_MCAST(prxattrib->ra))) {
 381                                         psecuritypriv->bcheck_grpkey = true;
 382                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("psecuritypriv->bcheck_grpkey = true"));
 383                                 }
 384                         }
 385                 } else {
 386                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recvframe_chkmic: rtw_get_stainfo==NULL!!!\n"));
 387                 }
 388
 389                 recvframe_pull_tail(precvframe, 8);
 390         }
 391
 392 exit:
 393
 394         return res;
 395 }
 396
 397 /* decrypt and set the ivlen, icvlen of the recv_frame */
 398 static struct recv_frame *decryptor(struct adapter *padapter,
 399                                     struct recv_frame *precv_frame)
 400 {
 401         struct rx_pkt_attrib *prxattrib = &precv_frame->attrib;
 402         struct security_priv *psecuritypriv = &padapter->securitypriv;
 403         struct recv_frame *return_packet = precv_frame;
 404         u32      res = _SUCCESS;
 405
 406         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("prxstat->decrypted=%x prxattrib->encrypt=0x%03x\n", prxattrib->bdecrypted, prxattrib->encrypt));
 407
 408         if (prxattrib->encrypt > 0) {
 409                 u8 *iv = precv_frame->rx_data+prxattrib->hdrlen;
 410                 prxattrib->key_index = (((iv[3])>>6)&0x3);
 411
 412                 if (prxattrib->key_index > WEP_KEYS) {
 413                         DBG_88E("prxattrib->key_index(%d)>WEP_KEYS\n", prxattrib->key_index);
 414
 415                         switch (prxattrib->encrypt) {
 416                         case _WEP40_:
 417                         case _WEP104_:
 418                                 prxattrib->key_index = psecuritypriv->dot11PrivacyKeyIndex;
 419                                 break;
 420                         case _TKIP_:
 421                         case _AES_:
 422                         default:
 423                                 prxattrib->key_index = psecuritypriv->dot118021XGrpKeyid;
 424                                 break;
 425                         }
 426                 }
 427         }
 428
 429         if ((prxattrib->encrypt > 0) && ((prxattrib->bdecrypted == 0) || (psecuritypriv->sw_decrypt))) {
 430                 psecuritypriv->hw_decrypted = false;
 431
 432                 switch (prxattrib->encrypt) {
 433                 case _WEP40_:
 434                 case _WEP104_:
 435                         rtw_wep_decrypt(padapter, (u8 *)precv_frame);
 436                         break;
 437                 case _TKIP_:
 438                         res = rtw_tkip_decrypt(padapter, (u8 *)precv_frame);
 439                         break;
 440                 case _AES_:
 441                         res = rtw_aes_decrypt(padapter, (u8 *)precv_frame);
 442                         break;
 443                 default:
 444                         break;
 445                 }
 446         } else if (prxattrib->bdecrypted == 1 && prxattrib->encrypt > 0 &&
 447                    (psecuritypriv->busetkipkey == 1 || prxattrib->encrypt != _TKIP_))
 448                         psecuritypriv->hw_decrypted = true;
 449
 450         if (res == _FAIL) {
 451                 rtw_free_recvframe(return_packet, &padapter->recvpriv.free_recv_queue);
 452                 return_packet = NULL;
 453         }
 454
 455         return return_packet;
 456 }
 457
 458 /* set the security information in the recv_frame */
 459 static struct recv_frame *portctrl(struct adapter *adapter,
 460                                    struct recv_frame *precv_frame)
 461 {
 462         u8   *psta_addr, *ptr;
 463         uint  auth_alg;
 464         struct recv_frame *pfhdr;
 465         struct sta_info *psta;
 466         struct sta_priv *pstapriv;
 467         struct recv_frame *prtnframe;
 468         u16     ether_type;
 469         u16  eapol_type = 0x888e;/* for Funia BD's WPA issue */
 470         struct rx_pkt_attrib *pattrib;
 471         __be16 be_tmp;
 472
 473         pstapriv = &adapter->stapriv;
 474
 475         auth_alg = adapter->securitypriv.dot11AuthAlgrthm;
 476
 477         ptr = precv_frame->rx_data;
 478         pfhdr = precv_frame;
 479         pattrib = &pfhdr->attrib;
 480         psta_addr = pattrib->ta;
 481         psta = rtw_get_stainfo(pstapriv, psta_addr);
 482
 483         prtnframe = NULL;
 484
 485         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:adapter->securitypriv.dot11AuthAlgrthm=%d\n", adapter->securitypriv.dot11AuthAlgrthm));
 486
 487         if (auth_alg == 2) {
 488                 /* get ether_type */
 489                 ptr = ptr + pfhdr->attrib.hdrlen + LLC_HEADER_SIZE;
 490                 memcpy(&be_tmp, ptr, 2);
 491                 ether_type = ntohs(be_tmp);
 492
 493                 if ((psta != NULL) && (psta->ieee8021x_blocked)) {
 494                         /* blocked */
 495                         /* only accept EAPOL frame */
 496                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:psta->ieee8021x_blocked==1\n"));
 497
 498                         if (ether_type == eapol_type) {
 499                                 prtnframe = precv_frame;
 500                         } else {
 501                                 /* free this frame */
 502                                 rtw_free_recvframe(precv_frame, &adapter->recvpriv.free_recv_queue);
 503                                 prtnframe = NULL;
 504                         }
 505                 } else {
 506                         /* allowed */
 507                         /* check decryption status, and decrypt the frame if needed */
 508                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:psta->ieee8021x_blocked==0\n"));
 509                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
 510                                  ("portctrl:precv_frame->hdr.attrib.privacy=%x\n",
 511                                  precv_frame->attrib.privacy));
 512
 513                         if (pattrib->bdecrypted == 0)
 514                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("portctrl:prxstat->decrypted=%x\n", pattrib->bdecrypted));
 515
 516                         prtnframe = precv_frame;
 517                         /* check is the EAPOL frame or not (Rekey) */
 518                         if (ether_type == eapol_type) {
 519                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("########portctrl:ether_type==0x888e\n"));
 520                                 /* check Rekey */
 521
 522                                 prtnframe = precv_frame;
 523                         } else {
 524                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:ether_type=0x%04x\n", ether_type));
 525                         }
 526                 }
 527         } else {
 528                 prtnframe = precv_frame;
 529         }
 530
 531                 return prtnframe;
 532 }
 533
 534 static int recv_decache(struct recv_frame *precv_frame, u8 bretry,
 535                         struct stainfo_rxcache *prxcache)
 536 {
 537         int tid = precv_frame->attrib.priority;
 538
 539         u16 seq_ctrl = ((precv_frame->attrib.seq_num&0xffff) << 4) |
 540                 (precv_frame->attrib.frag_num & 0xf);
 541
 542         if (tid > 15) {
 543                 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("recv_decache, (tid>15)! seq_ctrl=0x%x, tid=0x%x\n", seq_ctrl, tid));
 544
 545                 return _FAIL;
 546         }
 547
 548         if (1) {/* if (bretry) */
 549                 if (seq_ctrl == prxcache->tid_rxseq[tid]) {
 550                         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("recv_decache, seq_ctrl=0x%x, tid=0x%x, tid_rxseq=0x%x\n", seq_ctrl, tid, prxcache->tid_rxseq[tid]));
 551
 552                         return _FAIL;
 553                 }
 554         }
 555
 556         prxcache->tid_rxseq[tid] = seq_ctrl;
 557
 558         return _SUCCESS;
 559 }
 560
 561 static void process_pwrbit_data(struct adapter *padapter,
 562                                 struct recv_frame *precv_frame)
 563 {
 564 #ifdef CONFIG_88EU_AP_MODE
 565         unsigned char pwrbit;
 566         u8 *ptr = precv_frame->rx_data;
 567         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 568         struct sta_priv *pstapriv = &padapter->stapriv;
 569         struct sta_info *psta = NULL;
 570
 571         psta = rtw_get_stainfo(pstapriv, pattrib->src);
 572
 573         pwrbit = GetPwrMgt(ptr);
 574
 575         if (psta) {
 576                 if (pwrbit) {
 577                         if (!(psta->state & WIFI_SLEEP_STATE))
 578                                 stop_sta_xmit(padapter, psta);
 579                 } else {
 580                         if (psta->state & WIFI_SLEEP_STATE)
 581                                 wakeup_sta_to_xmit(padapter, psta);
 582                 }
 583         }
 584
 585 #endif
 586 }
 587
 588 static void process_wmmps_data(struct adapter *padapter,
 589                                struct recv_frame *precv_frame)
 590 {
 591 #ifdef CONFIG_88EU_AP_MODE
 592         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 593         struct sta_priv *pstapriv = &padapter->stapriv;
 594         struct sta_info *psta = NULL;
 595
 596         psta = rtw_get_stainfo(pstapriv, pattrib->src);
 597
 598         if (!psta)
 599                 return;
 600
 601         if (!psta->qos_option)
 602                 return;
 603
 604         if (!(psta->qos_info&0xf))
 605                 return;
 606
 607         if (psta->state&WIFI_SLEEP_STATE) {
 608                 u8 wmmps_ac = 0;
 609
 610                 switch (pattrib->priority) {
 611                 case 1:
 612                 case 2:
 613                         wmmps_ac = psta->uapsd_bk&BIT(1);
 614                         break;
 615                 case 4:
 616                 case 5:
 617                         wmmps_ac = psta->uapsd_vi&BIT(1);
 618                         break;
 619                 case 6:
 620                 case 7:
 621                         wmmps_ac = psta->uapsd_vo&BIT(1);
 622                         break;
 623                 case 0:
 624                 case 3:
 625                 default:
 626                         wmmps_ac = psta->uapsd_be&BIT(1);
 627                         break;
 628                 }
 629
 630                 if (wmmps_ac) {
 631                         if (psta->sleepq_ac_len > 0) {
 632                                 /* process received triggered frame */
 633                                 xmit_delivery_enabled_frames(padapter, psta);
 634                         } else {
 635                                 /* issue one qos null frame with More data bit = 0 and the EOSP bit set (= 1) */
 636                                 issue_qos_nulldata(padapter, psta->hwaddr, (u16)pattrib->priority, 0, 0);
 637                         }
 638                 }
 639         }
 640
 641 #endif
 642 }
 643
 644 static void count_rx_stats(struct adapter *padapter,
 645                            struct recv_frame *prframe,
 646                            struct sta_info *sta)
 647 {
 648         int     sz;
 649         struct sta_info         *psta = NULL;
 650         struct stainfo_stats    *pstats = NULL;
 651         struct rx_pkt_attrib    *pattrib = &prframe->attrib;
 652         struct recv_priv        *precvpriv = &padapter->recvpriv;
 653
 654         sz = prframe->len;
 655         precvpriv->rx_bytes += sz;
 656
 657         padapter->mlmepriv.LinkDetectInfo.NumRxOkInPeriod++;
 658
 659         if ((!MacAddr_isBcst(pattrib->dst)) && (!IS_MCAST(pattrib->dst)))
 660                 padapter->mlmepriv.LinkDetectInfo.NumRxUnicastOkInPeriod++;
 661
 662         if (sta)
 663                 psta = sta;
 664         else
 665                 psta = prframe->psta;
 666
 667         if (psta) {
 668                 pstats = &psta->sta_stats;
 669
 670                 pstats->rx_data_pkts++;
 671                 pstats->rx_bytes += sz;
 672         }
 673 }
 674
 675 int sta2sta_data_frame(
 676         struct adapter *adapter,
 677         struct recv_frame *precv_frame,
 678         struct sta_info **psta
 679 );
 680
 681 int sta2sta_data_frame(struct adapter *adapter, struct recv_frame *precv_frame,
 682                        struct sta_info **psta)
 683 {
 684         u8 *ptr = precv_frame->rx_data;
 685         int ret = _SUCCESS;
 686         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 687         struct  sta_priv *pstapriv = &adapter->stapriv;
 688         struct  mlme_priv *pmlmepriv = &adapter->mlmepriv;
 689         u8 *mybssid  = get_bssid(pmlmepriv);
 690         u8 *myhwaddr = myid(&adapter->eeprompriv);
 691         u8 *sta_addr = NULL;
 692         int bmcast = IS_MCAST(pattrib->dst);
 693
 694         if ((check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) == true) ||
 695             (check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE) == true)) {
 696                 /*  filter packets that SA is myself or multicast or broadcast */
 697                 if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN)) {
 698                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" SA==myself\n"));
 699                         ret = _FAIL;
 700                         goto exit;
 701                 }
 702
 703                 if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast)) {
 704                         ret = _FAIL;
 705                         goto exit;
 706                 }
 707
 708                 if (!memcmp(pattrib->bssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
 709                     !memcmp(mybssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
 710                     memcmp(pattrib->bssid, mybssid, ETH_ALEN)) {
 711                         ret = _FAIL;
 712                         goto exit;
 713                 }
 714
 715                 sta_addr = pattrib->src;
 716         } else if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
 717                 /*  For Station mode, sa and bssid should always be BSSID, and DA is my mac-address */
 718                 if (memcmp(pattrib->bssid, pattrib->src, ETH_ALEN)) {
 719                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("bssid!=TA under STATION_MODE; drop pkt\n"));
 720                         ret = _FAIL;
 721                         goto exit;
 722                 }
 723                 sta_addr = pattrib->bssid;
 724         } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
 725                 if (bmcast) {
 726                         /*  For AP mode, if DA == MCAST, then BSSID should be also MCAST */
 727                         if (!IS_MCAST(pattrib->bssid)) {
 728                                         ret = _FAIL;
 729                                         goto exit;
 730                         }
 731                 } else { /*  not mc-frame */
 732                         /*  For AP mode, if DA is non-MCAST, then it must be BSSID, and bssid == BSSID */
 733                         if (memcmp(pattrib->bssid, pattrib->dst, ETH_ALEN)) {
 734                                 ret = _FAIL;
 735                                 goto exit;
 736                         }
 737
 738                         sta_addr = pattrib->src;
 739                 }
 740         } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
 741                 memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN);
 742                 memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN);
 743                 memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN);
 744                 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
 745                 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
 746
 747                 sta_addr = mybssid;
 748         } else {
 749                 ret  = _FAIL;
 750         }
 751
 752         if (bmcast)
 753                 *psta = rtw_get_bcmc_stainfo(adapter);
 754         else
 755                 *psta = rtw_get_stainfo(pstapriv, sta_addr); /*  get ap_info */
 756
 757         if (*psta == NULL) {
 758                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("can't get psta under sta2sta_data_frame ; drop pkt\n"));
 759                 ret = _FAIL;
 760                 goto exit;
 761         }
 762
 763 exit:
 764         return ret;
 765 }
 766
 767 static int ap2sta_data_frame(
 768         struct adapter *adapter,
 769         struct recv_frame *precv_frame,
 770         struct sta_info **psta)
 771 {
 772         u8 *ptr = precv_frame->rx_data;
 773         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 774         int ret = _SUCCESS;
 775         struct  sta_priv *pstapriv = &adapter->stapriv;
 776         struct  mlme_priv *pmlmepriv = &adapter->mlmepriv;
 777         u8 *mybssid  = get_bssid(pmlmepriv);
 778         u8 *myhwaddr = myid(&adapter->eeprompriv);
 779         int bmcast = IS_MCAST(pattrib->dst);
 780
 781         if ((check_fwstate(pmlmepriv, WIFI_STATION_STATE) == true) &&
 782             (check_fwstate(pmlmepriv, _FW_LINKED) == true ||
 783             check_fwstate(pmlmepriv, _FW_UNDER_LINKING))) {
 784                 /*  filter packets that SA is myself or multicast or broadcast */
 785                 if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN)) {
 786                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" SA==myself\n"));
 787                         ret = _FAIL;
 788                         goto exit;
 789                 }
 790
 791                 /*  da should be for me */
 792                 if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast)) {
 793                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
 794                                  (" ap2sta_data_frame:  compare DA fail; DA=%pM\n", (pattrib->dst)));
 795                         ret = _FAIL;
 796                         goto exit;
 797                 }
 798
 799                 /*  check BSSID */
 800                 if (!memcmp(pattrib->bssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
 801                     !memcmp(mybssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
 802                      (memcmp(pattrib->bssid, mybssid, ETH_ALEN))) {
 803                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
 804                                  (" ap2sta_data_frame:  compare BSSID fail ; BSSID=%pM\n", (pattrib->bssid)));
 805                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("mybssid=%pM\n", (mybssid)));
 806
 807                         if (!bmcast) {
 808                                 DBG_88E("issue_deauth to the nonassociated ap=%pM for the reason(7)\n", (pattrib->bssid));
 809                                 issue_deauth(adapter, pattrib->bssid, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
 810                         }
 811
 812                         ret = _FAIL;
 813                         goto exit;
 814                 }
 815
 816                 if (bmcast)
 817                         *psta = rtw_get_bcmc_stainfo(adapter);
 818                 else
 819                         *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /*  get ap_info */
 820
 821                 if (*psta == NULL) {
 822                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("ap2sta: can't get psta under STATION_MODE ; drop pkt\n"));
 823                         ret = _FAIL;
 824                         goto exit;
 825                 }
 826
 827                 /* if ((GetFrameSubType(ptr) & WIFI_QOS_DATA_TYPE) == WIFI_QOS_DATA_TYPE) { */
 828                 /*  */
 829
 830                 if (GetFrameSubType(ptr) & BIT(6)) {
 831                         /* No data, will not indicate to upper layer, temporily count it here */
 832                         count_rx_stats(adapter, precv_frame, *psta);
 833                         ret = RTW_RX_HANDLED;
 834                         goto exit;
 835                 }
 836         } else if ((check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) &&
 837                    (check_fwstate(pmlmepriv, _FW_LINKED) == true)) {
 838                 memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN);
 839                 memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN);
 840                 memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN);
 841                 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
 842                 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
 843
 844                 /*  */
 845                 memcpy(pattrib->bssid,  mybssid, ETH_ALEN);
 846
 847                 *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /*  get sta_info */
 848                 if (*psta == NULL) {
 849                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("can't get psta under MP_MODE ; drop pkt\n"));
 850                         ret = _FAIL;
 851                         goto exit;
 852                 }
 853         } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
 854                 /* Special case */
 855                 ret = RTW_RX_HANDLED;
 856                 goto exit;
 857         } else {
 858                 if (!memcmp(myhwaddr, pattrib->dst, ETH_ALEN) && (!bmcast)) {
 859                         *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /*  get sta_info */
 860                         if (*psta == NULL) {
 861                                 DBG_88E("issue_deauth to the ap =%pM for the reason(7)\n", (pattrib->bssid));
 862
 863                                 issue_deauth(adapter, pattrib->bssid, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
 864                         }
 865                 }
 866
 867                 ret = _FAIL;
 868         }
 869
 870 exit:
 871
 872         return ret;
 873 }
 874
 875 static int sta2ap_data_frame(struct adapter *adapter,
 876                              struct recv_frame *precv_frame,
 877                              struct sta_info **psta)
 878 {
 879         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 880         struct  sta_priv *pstapriv = &adapter->stapriv;
 881         struct  mlme_priv *pmlmepriv = &adapter->mlmepriv;
 882         u8 *ptr = precv_frame->rx_data;
 883         unsigned char *mybssid  = get_bssid(pmlmepriv);
 884         int ret = _SUCCESS;
 885
 886         if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) {
 887                 /* For AP mode, RA = BSSID, TX = STA(SRC_ADDR), A3 = DST_ADDR */
 888                 if (memcmp(pattrib->bssid, mybssid, ETH_ALEN)) {
 889                         ret = _FAIL;
 890                         goto exit;
 891                 }
 892
 893                 *psta = rtw_get_stainfo(pstapriv, pattrib->src);
 894                 if (*psta == NULL) {
 895                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("can't get psta under AP_MODE; drop pkt\n"));
 896                         DBG_88E("issue_deauth to sta=%pM for the reason(7)\n", (pattrib->src));
 897
 898                         issue_deauth(adapter, pattrib->src, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
 899
 900                         ret = RTW_RX_HANDLED;
 901                         goto exit;
 902                 }
 903
 904                 process_pwrbit_data(adapter, precv_frame);
 905
 906                 if ((GetFrameSubType(ptr) & WIFI_QOS_DATA_TYPE) == WIFI_QOS_DATA_TYPE)
 907                         process_wmmps_data(adapter, precv_frame);
 908
 909                 if (GetFrameSubType(ptr) & BIT(6)) {
 910                         /* No data, will not indicate to upper layer, temporily count it here */
 911                         count_rx_stats(adapter, precv_frame, *psta);
 912                         ret = RTW_RX_HANDLED;
 913                         goto exit;
 914                 }
 915         } else {
 916                 u8 *myhwaddr = myid(&adapter->eeprompriv);
 917                 if (memcmp(pattrib->ra, myhwaddr, ETH_ALEN)) {
 918                         ret = RTW_RX_HANDLED;
 919                         goto exit;
 920                 }
 921                 DBG_88E("issue_deauth to sta=%pM for the reason(7)\n", (pattrib->src));
 922                 issue_deauth(adapter, pattrib->src, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
 923                 ret = RTW_RX_HANDLED;
 924                 goto exit;
 925         }
 926
 927 exit:
 928
 929         return ret;
 930 }
 931
 932 static int validate_recv_ctrl_frame(struct adapter *padapter,
 933                                     struct recv_frame *precv_frame)
 934 {
 935 #ifdef CONFIG_88EU_AP_MODE
 936         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 937         struct sta_priv *pstapriv = &padapter->stapriv;
 938         u8 *pframe = precv_frame->rx_data;
 939
 940         if (GetFrameType(pframe) != WIFI_CTRL_TYPE)
 941                 return _FAIL;
 942
 943         /* receive the frames that ra(a1) is my address */
 944         if (memcmp(GetAddr1Ptr(pframe), myid(&padapter->eeprompriv), ETH_ALEN))
 945                 return _FAIL;
 946
 947         /* only handle ps-poll */
 948         if (GetFrameSubType(pframe) == WIFI_PSPOLL) {
 949                 u16 aid;
 950                 u8 wmmps_ac = 0;
 951                 struct sta_info *psta = NULL;
 952
 953                 aid = GetAid(pframe);
 954                 psta = rtw_get_stainfo(pstapriv, GetAddr2Ptr(pframe));
 955
 956                 if ((psta == NULL) || (psta->aid != aid))
 957                         return _FAIL;
 958
 959                 /* for rx pkt statistics */
 960                 psta->sta_stats.rx_ctrl_pkts++;
 961
 962                 switch (pattrib->priority) {
 963                 case 1:
 964                 case 2:
 965                         wmmps_ac = psta->uapsd_bk&BIT(0);
 966                         break;
 967                 case 4:
 968                 case 5:
 969                         wmmps_ac = psta->uapsd_vi&BIT(0);
 970                         break;
 971                 case 6:
 972                 case 7:
 973                         wmmps_ac = psta->uapsd_vo&BIT(0);
 974                         break;
 975                 case 0:
 976                 case 3:
 977                 default:
 978                         wmmps_ac = psta->uapsd_be&BIT(0);
 979                         break;
 980                 }
 981
 982                 if (wmmps_ac)
 983                         return _FAIL;
 984
 985                 if (psta->state & WIFI_STA_ALIVE_CHK_STATE) {
 986                         DBG_88E("%s alive check-rx ps-poll\n", __func__);
 987                         psta->expire_to = pstapriv->expire_to;
 988                         psta->state ^= WIFI_STA_ALIVE_CHK_STATE;
 989                 }
 990
 991                 if ((psta->state&WIFI_SLEEP_STATE) && (pstapriv->sta_dz_bitmap&BIT(psta->aid))) {
 992                         struct list_head *xmitframe_plist, *xmitframe_phead;
 993                         struct xmit_frame *pxmitframe = NULL;
 994
 995                         spin_lock_bh(&psta->sleep_q.lock);
 996
 997                         xmitframe_phead = get_list_head(&psta->sleep_q);
 998                         xmitframe_plist = xmitframe_phead->next;
 999
1000                         if (xmitframe_phead != xmitframe_plist) {
1001                                 pxmitframe = container_of(xmitframe_plist, struct xmit_frame, list);
1002
1003                                 xmitframe_plist = xmitframe_plist->next;
1004
1005                                 list_del_init(&pxmitframe->list);
1006
1007                                 psta->sleepq_len--;
1008
1009                                 if (psta->sleepq_len > 0)
1010                                         pxmitframe->attrib.mdata = 1;
1011                                 else
1012                                         pxmitframe->attrib.mdata = 0;
1013
1014                                 pxmitframe->attrib.triggered = 1;
1015
1016                                 spin_unlock_bh(&psta->sleep_q.lock);
1017                                 if (rtw_hal_xmit(padapter, pxmitframe) == true)
1018                                         rtw_os_xmit_complete(padapter, pxmitframe);
1019                                 spin_lock_bh(&psta->sleep_q.lock);
1020
1021                                 if (psta->sleepq_len == 0) {
1022                                         pstapriv->tim_bitmap &= ~BIT(psta->aid);
1023
1024                                         /* update BCN for TIM IE */
1025                                         /* update_BCNTIM(padapter); */
1026                                         update_beacon(padapter, _TIM_IE_, NULL, false);
1027                                 }
1028                         } else {
1029                                 if (pstapriv->tim_bitmap&BIT(psta->aid)) {
1030                                         if (psta->sleepq_len == 0) {
1031                                                 DBG_88E("no buffered packets to xmit\n");
1032
1033                                                 /* issue nulldata with More data bit = 0 to indicate we have no buffered packets */
1034                                                 issue_nulldata(padapter, psta->hwaddr, 0, 0, 0);
1035                                         } else {
1036                                                 DBG_88E("error!psta->sleepq_len=%d\n", psta->sleepq_len);
1037                                                 psta->sleepq_len = 0;
1038                                         }
1039
1040                                         pstapriv->tim_bitmap &= ~BIT(psta->aid);
1041
1042                                         /* update BCN for TIM IE */
1043                                         /* update_BCNTIM(padapter); */
1044                                         update_beacon(padapter, _TIM_IE_, NULL, false);
1045                                 }
1046                         }
1047
1048                         spin_unlock_bh(&psta->sleep_q.lock);
1049                 }
1050         }
1051
1052 #endif
1053
1054         return _FAIL;
1055 }
1056
1057 struct recv_frame *recvframe_chk_defrag(struct adapter *padapter,
1058                                         struct recv_frame *precv_frame);
1059
1060 static int validate_recv_mgnt_frame(struct adapter *padapter,
1061                                     struct recv_frame *precv_frame)
1062 {
1063         struct sta_info *psta;
1064
1065         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("+validate_recv_mgnt_frame\n"));
1066
1067         precv_frame = recvframe_chk_defrag(padapter, precv_frame);
1068         if (precv_frame == NULL) {
1069                 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("%s: fragment packet\n", __func__));
1070                 return _SUCCESS;
1071         }
1072
1073         /* for rx pkt statistics */
1074         psta = rtw_get_stainfo(&padapter->stapriv,
1075                                GetAddr2Ptr(precv_frame->rx_data));
1076         if (psta) {
1077                 psta->sta_stats.rx_mgnt_pkts++;
1078                 if (GetFrameSubType(precv_frame->rx_data) == WIFI_BEACON) {
1079                         psta->sta_stats.rx_beacon_pkts++;
1080                 } else if (GetFrameSubType(precv_frame->rx_data) == WIFI_PROBEREQ) {
1081                         psta->sta_stats.rx_probereq_pkts++;
1082                 } else if (GetFrameSubType(precv_frame->rx_data) == WIFI_PROBERSP) {
1083                         if (!memcmp(padapter->eeprompriv.mac_addr,
1084                                     GetAddr1Ptr(precv_frame->rx_data), ETH_ALEN))
1085                                 psta->sta_stats.rx_probersp_pkts++;
1086                         else if (is_broadcast_mac_addr(GetAddr1Ptr(precv_frame->rx_data)) ||
1087                                  is_multicast_mac_addr(GetAddr1Ptr(precv_frame->rx_data)))
1088                                 psta->sta_stats.rx_probersp_bm_pkts++;
1089                         else
1090                                 psta->sta_stats.rx_probersp_uo_pkts++;
1091                 }
1092         }
1093
1094         mgt_dispatcher(padapter, precv_frame);
1095
1096         return _SUCCESS;
1097 }
1098
1099 static int validate_recv_data_frame(struct adapter *adapter,
1100                                     struct recv_frame *precv_frame)
1101 {
1102         u8 bretry;
1103         u8 *psa, *pda, *pbssid;
1104         struct sta_info *psta = NULL;
1105         u8 *ptr = precv_frame->rx_data;
1106         struct rx_pkt_attrib    *pattrib = &precv_frame->attrib;
1107         struct security_priv    *psecuritypriv = &adapter->securitypriv;
1108         int ret = _SUCCESS;
1109
1110         bretry = GetRetry(ptr);
1111         pda = get_da(ptr);
1112         psa = get_sa(ptr);
1113         pbssid = get_hdr_bssid(ptr);
1114
1115         if (pbssid == NULL) {
1116                 ret = _FAIL;
1117                 goto exit;
1118         }
1119
1120         memcpy(pattrib->dst, pda, ETH_ALEN);
1121         memcpy(pattrib->src, psa, ETH_ALEN);
1122
1123         memcpy(pattrib->bssid, pbssid, ETH_ALEN);
1124
1125         switch (pattrib->to_fr_ds) {
1126         case 0:
1127                 memcpy(pattrib->ra, pda, ETH_ALEN);
1128                 memcpy(pattrib->ta, psa, ETH_ALEN);
1129                 ret = sta2sta_data_frame(adapter, precv_frame, &psta);
1130                 break;
1131         case 1:
1132                 memcpy(pattrib->ra, pda, ETH_ALEN);
1133                 memcpy(pattrib->ta, pbssid, ETH_ALEN);
1134                 ret = ap2sta_data_frame(adapter, precv_frame, &psta);
1135                 break;
1136         case 2:
1137                 memcpy(pattrib->ra, pbssid, ETH_ALEN);
1138                 memcpy(pattrib->ta, psa, ETH_ALEN);
1139                 ret = sta2ap_data_frame(adapter, precv_frame, &psta);
1140                 break;
1141         case 3:
1142                 memcpy(pattrib->ra, GetAddr1Ptr(ptr), ETH_ALEN);
1143                 memcpy(pattrib->ta, GetAddr2Ptr(ptr), ETH_ALEN);
1144                 ret = _FAIL;
1145                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" case 3\n"));
1146                 break;
1147         default:
1148                 ret = _FAIL;
1149                 break;
1150         }
1151
1152         if (ret == _FAIL) {
1153                 goto exit;
1154         } else if (ret == RTW_RX_HANDLED) {
1155                 goto exit;
1156         }
1157
1158         if (psta == NULL) {
1159                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" after to_fr_ds_chk; psta==NULL\n"));
1160                 ret = _FAIL;
1161                 goto exit;
1162         }
1163
1164         /* psta->rssi = prxcmd->rssi; */
1165         /* psta->signal_quality = prxcmd->sq; */
1166         precv_frame->psta = psta;
1167
1168         pattrib->amsdu = 0;
1169         pattrib->ack_policy = 0;
1170         /* parsing QC field */
1171         if (pattrib->qos == 1) {
1172                 pattrib->priority = GetPriority((ptr + 24));
1173                 pattrib->ack_policy = GetAckpolicy((ptr + 24));
1174                 pattrib->amsdu = GetAMsdu((ptr + 24));
1175                 pattrib->hdrlen = pattrib->to_fr_ds == 3 ? 32 : 26;
1176
1177                 if (pattrib->priority != 0 && pattrib->priority != 3)
1178                         adapter->recvpriv.bIsAnyNonBEPkts = true;
1179         } else {
1180                 pattrib->priority = 0;
1181                 pattrib->hdrlen = pattrib->to_fr_ds == 3 ? 30 : 24;
1182         }
1183
1184         if (pattrib->order)/* HT-CTRL 11n */
1185                 pattrib->hdrlen += 4;
1186
1187         precv_frame->preorder_ctrl = &psta->recvreorder_ctrl[pattrib->priority];
1188
1189         /*  decache, drop duplicate recv packets */
1190         if (recv_decache(precv_frame, bretry, &psta->sta_recvpriv.rxcache) == _FAIL) {
1191                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("decache : drop pkt\n"));
1192                 ret = _FAIL;
1193                 goto exit;
1194         }
1195
1196         if (pattrib->privacy) {
1197                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("validate_recv_data_frame:pattrib->privacy=%x\n", pattrib->privacy));
1198                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n ^^^^^^^^^^^IS_MCAST(pattrib->ra(0x%02x))=%d^^^^^^^^^^^^^^^6\n", pattrib->ra[0], IS_MCAST(pattrib->ra)));
1199
1200                 GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt, IS_MCAST(pattrib->ra));
1201
1202                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n pattrib->encrypt=%d\n", pattrib->encrypt));
1203
1204                 SET_ICE_IV_LEN(pattrib->iv_len, pattrib->icv_len, pattrib->encrypt);
1205         } else {
1206                 pattrib->encrypt = 0;
1207                 pattrib->iv_len = 0;
1208                 pattrib->icv_len = 0;
1209         }
1210
1211 exit:
1212
1213         return ret;
1214 }
1215
1216 static int validate_recv_frame(struct adapter *adapter,
1217                                struct recv_frame *precv_frame)
1218 {
1219         /* shall check frame subtype, to / from ds, da, bssid */
1220
1221         /* then call check if rx seq/frag. duplicated. */
1222
1223         u8 type;
1224         u8 subtype;
1225         int retval = _SUCCESS;
1226         u8 bDumpRxPkt;
1227         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
1228         u8 *ptr = precv_frame->rx_data;
1229         u8  ver = (unsigned char)(*ptr)&0x3;
1230         struct mlme_ext_priv *pmlmeext = &adapter->mlmeextpriv;
1231
1232         if (pmlmeext->sitesurvey_res.state == SCAN_PROCESS) {
1233                 int ch_set_idx = rtw_ch_set_search_ch(pmlmeext->channel_set, rtw_get_oper_ch(adapter));
1234                 if (ch_set_idx >= 0)
1235                         pmlmeext->channel_set[ch_set_idx].rx_count++;
1236         }
1237
1238         /* add version chk */
1239         if (ver != 0) {
1240                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_data_frame fail! (ver!=0)\n"));
1241                 retval = _FAIL;
1242                 goto exit;
1243         }
1244
1245         type =  GetFrameType(ptr);
1246         subtype = GetFrameSubType(ptr); /* bit(7)~bit(2) */
1247
1248         pattrib->to_fr_ds = get_tofr_ds(ptr);
1249
1250         pattrib->frag_num = GetFragNum(ptr);
1251         pattrib->seq_num = GetSequence(ptr);
1252
1253         pattrib->pw_save = GetPwrMgt(ptr);
1254         pattrib->mfrag = GetMFrag(ptr);
1255         pattrib->mdata = GetMData(ptr);
1256         pattrib->privacy = GetPrivacy(ptr);
1257         pattrib->order = GetOrder(ptr);
1258
1259         /* Dump rx packets */
1260         rtw_hal_get_def_var(adapter, HAL_DEF_DBG_DUMP_RXPKT, &(bDumpRxPkt));
1261         if (bDumpRxPkt == 1) {/* dump all rx packets */
1262                 if (_drv_err_ <= GlobalDebugLevel) {
1263                         pr_info(DRIVER_PREFIX "#############################\n");
1264                         print_hex_dump(KERN_INFO, DRIVER_PREFIX, DUMP_PREFIX_NONE,
1265                                         16, 1, ptr, 64, false);
1266                         pr_info(DRIVER_PREFIX "#############################\n");
1267                 }
1268         } else if (bDumpRxPkt == 2) {
1269                 if ((_drv_err_ <= GlobalDebugLevel) && (type == WIFI_MGT_TYPE)) {
1270                         pr_info(DRIVER_PREFIX "#############################\n");
1271                         print_hex_dump(KERN_INFO, DRIVER_PREFIX, DUMP_PREFIX_NONE,
1272                                         16, 1, ptr, 64, false);
1273                         pr_info(DRIVER_PREFIX "#############################\n");
1274                 }
1275         } else if (bDumpRxPkt == 3) {
1276                 if ((_drv_err_ <= GlobalDebugLevel) && (type == WIFI_DATA_TYPE)) {
1277                         pr_info(DRIVER_PREFIX "#############################\n");
1278                         print_hex_dump(KERN_INFO, DRIVER_PREFIX, DUMP_PREFIX_NONE,
1279                                         16, 1, ptr, 64, false);
1280                         pr_info(DRIVER_PREFIX "#############################\n");
1281                 }
1282         }
1283         switch (type) {
1284         case WIFI_MGT_TYPE: /* mgnt */
1285                 retval = validate_recv_mgnt_frame(adapter, precv_frame);
1286                 if (retval == _FAIL)
1287                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_mgnt_frame fail\n"));
1288                 retval = _FAIL; /*  only data frame return _SUCCESS */
1289                 break;
1290         case WIFI_CTRL_TYPE: /* ctrl */
1291                 retval = validate_recv_ctrl_frame(adapter, precv_frame);
1292                 if (retval == _FAIL)
1293                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_ctrl_frame fail\n"));
1294                 retval = _FAIL; /*  only data frame return _SUCCESS */
1295                 break;
1296         case WIFI_DATA_TYPE: /* data */
1297                 rtw_led_control(adapter, LED_CTL_RX);
1298                 pattrib->qos = (subtype & BIT(7)) ? 1 : 0;
1299                 retval = validate_recv_data_frame(adapter, precv_frame);
1300                 if (retval == _FAIL) {
1301                         struct recv_priv *precvpriv = &adapter->recvpriv;
1302                         precvpriv->rx_drop++;
1303                 }
1304                 break;
1305         default:
1306                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_data_frame fail! type= 0x%x\n", type));
1307                 retval = _FAIL;
1308                 break;
1309         }
1310
1311         /*
1312          * This is the last moment before management and control frames get
1313          * discarded. So we need to forward them to the monitor now or never.
1314          *
1315          * At the same time data frames can still be encrypted if software
1316          * decryption is in use. However, decryption can occur not until later
1317          * (see recv_func()).
1318          *
1319          * Hence forward the frame to the monitor anyway to preserve the order
1320          * in which frames were received.
1321          */
1322         rtl88eu_mon_recv_hook(adapter->pmondev, precv_frame);
1323
1324 exit:
1325
1326         return retval;
1327 }
1328
1329 /* remove the wlanhdr and add the eth_hdr */
1330
1331 static int wlanhdr_to_ethhdr(struct recv_frame *precvframe)
1332 {
1333         int     rmv_len;
1334         u16     eth_type, len;
1335         __be16 be_tmp;
1336         u8      bsnaphdr;
1337         u8      *psnap_type;
1338         struct ieee80211_snap_hdr       *psnap;
1339
1340         struct adapter          *adapter = precvframe->adapter;
1341         struct mlme_priv        *pmlmepriv = &adapter->mlmepriv;
1342         u8 *ptr = precvframe->rx_data;
1343         struct rx_pkt_attrib *pattrib = &precvframe->attrib;
1344
1345         if (pattrib->encrypt)
1346                 recvframe_pull_tail(precvframe, pattrib->icv_len);
1347
1348         psnap = (struct ieee80211_snap_hdr *)(ptr+pattrib->hdrlen + pattrib->iv_len);
1349         psnap_type = ptr+pattrib->hdrlen + pattrib->iv_len+SNAP_SIZE;
1350         /* convert hdr + possible LLC headers into Ethernet header */
1351         if ((!memcmp(psnap, rtw_rfc1042_header, SNAP_SIZE) &&
1352              (!memcmp(psnap_type, SNAP_ETH_TYPE_IPX, 2) == false) &&
1353              (!memcmp(psnap_type, SNAP_ETH_TYPE_APPLETALK_AARP, 2) == false)) ||
1354              !memcmp(psnap, rtw_bridge_tunnel_header, SNAP_SIZE)) {
1355                 /* remove RFC1042 or Bridge-Tunnel encapsulation and replace EtherType */
1356                 bsnaphdr = true;
1357         } else {
1358                 /* Leave Ethernet header part of hdr and full payload */
1359                 bsnaphdr = false;
1360         }
1361
1362         rmv_len = pattrib->hdrlen + pattrib->iv_len + (bsnaphdr ? SNAP_SIZE : 0);
1363         len = precvframe->len - rmv_len;
1364
1365         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
1366                  ("\n===pattrib->hdrlen: %x,  pattrib->iv_len:%x===\n\n", pattrib->hdrlen,  pattrib->iv_len));
1367
1368         memcpy(&be_tmp, ptr+rmv_len, 2);
1369         eth_type = ntohs(be_tmp); /* pattrib->ether_type */
1370         pattrib->eth_type = eth_type;
1371
1372         if ((check_fwstate(pmlmepriv, WIFI_MP_STATE))) {
1373                 ptr += rmv_len;
1374                 *ptr = 0x87;
1375                 *(ptr+1) = 0x12;
1376
1377                 eth_type = 0x8712;
1378                 /*  append rx status for mp test packets */
1379                 ptr = recvframe_pull(precvframe, (rmv_len-sizeof(struct ethhdr)+2)-24);
1380                 memcpy(ptr, get_rxmem(precvframe), 24);
1381                 ptr += 24;
1382         } else {
1383                 ptr = recvframe_pull(precvframe, (rmv_len-sizeof(struct ethhdr) + (bsnaphdr ? 2 : 0)));
1384         }
1385
1386         if (!ptr)
1387                 return _FAIL;
1388
1389         memcpy(ptr, pattrib->dst, ETH_ALEN);
1390         memcpy(ptr+ETH_ALEN, pattrib->src, ETH_ALEN);
1391
1392         if (!bsnaphdr) {
1393                 be_tmp = htons(len);
1394                 memcpy(ptr+12, &be_tmp, 2);
1395         }
1396
1397         return _SUCCESS;
1398 }
1399
1400 /* perform defrag */
1401 static struct recv_frame *recvframe_defrag(struct adapter *adapter,
1402                                            struct __queue *defrag_q)
1403 {
1404         struct list_head *plist, *phead;
1405         u8 wlanhdr_offset;
1406         u8      curfragnum;
1407         struct recv_frame *pfhdr, *pnfhdr;
1408         struct recv_frame *prframe, *pnextrframe;
1409         struct __queue *pfree_recv_queue;
1410
1411         curfragnum = 0;
1412         pfree_recv_queue = &adapter->recvpriv.free_recv_queue;
1413
1414         phead = get_list_head(defrag_q);
1415         plist = phead->next;
1416         pfhdr = container_of(plist, struct recv_frame, list);
1417         prframe = pfhdr;
1418         list_del_init(&(prframe->list));
1419
1420         if (curfragnum != pfhdr->attrib.frag_num) {
1421                 /* the first fragment number must be 0 */
1422                 /* free the whole queue */
1423                 rtw_free_recvframe(prframe, pfree_recv_queue);
1424                 rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
1425
1426                 return NULL;
1427         }
1428
1429         curfragnum++;
1430
1431         plist = get_list_head(defrag_q);
1432
1433         plist = plist->next;
1434
1435         while (phead != plist) {
1436                 pnfhdr = container_of(plist, struct recv_frame, list);
1437                 pnextrframe = pnfhdr;
1438
1439                 /* check the fragment sequence  (2nd ~n fragment frame) */
1440
1441                 if (curfragnum != pnfhdr->attrib.frag_num) {
1442                         /* the fragment number must be increasing  (after decache) */
1443                         /* release the defrag_q & prframe */
1444                         rtw_free_recvframe(prframe, pfree_recv_queue);
1445                         rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
1446                         return NULL;
1447                 }
1448
1449                 curfragnum++;
1450
1451                 /* copy the 2nd~n fragment frame's payload to the first fragment */
1452                 /* get the 2nd~last fragment frame's payload */
1453
1454                 wlanhdr_offset = pnfhdr->attrib.hdrlen + pnfhdr->attrib.iv_len;
1455
1456                 recvframe_pull(pnextrframe, wlanhdr_offset);
1457
1458                 /* append  to first fragment frame's tail (if privacy frame, pull the ICV) */
1459                 recvframe_pull_tail(prframe, pfhdr->attrib.icv_len);
1460
1461                 /* memcpy */
1462                 memcpy(pfhdr->rx_tail, pnfhdr->rx_data, pnfhdr->len);
1463
1464                 recvframe_put(prframe, pnfhdr->len);
1465
1466                 pfhdr->attrib.icv_len = pnfhdr->attrib.icv_len;
1467                 plist = plist->next;
1468         }
1469
1470         /* free the defrag_q queue and return the prframe */
1471         rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
1472
1473         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("Performance defrag!!!!!\n"));
1474
1475         return prframe;
1476 }
1477
1478 /* check if need to defrag, if needed queue the frame to defrag_q */
1479 struct recv_frame *recvframe_chk_defrag(struct adapter *padapter,
1480                                         struct recv_frame *precv_frame)
1481 {
1482         u8      ismfrag;
1483         u8      fragnum;
1484         u8      *psta_addr;
1485         struct recv_frame *pfhdr;
1486         struct sta_info *psta;
1487         struct sta_priv *pstapriv;
1488         struct list_head *phead;
1489         struct recv_frame *prtnframe = NULL;
1490         struct __queue *pfree_recv_queue, *pdefrag_q;
1491
1492         pstapriv = &padapter->stapriv;
1493
1494         pfhdr = precv_frame;
1495
1496         pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
1497
1498         /* need to define struct of wlan header frame ctrl */
1499         ismfrag = pfhdr->attrib.mfrag;
1500         fragnum = pfhdr->attrib.frag_num;
1501
1502         psta_addr = pfhdr->attrib.ta;
1503         psta = rtw_get_stainfo(pstapriv, psta_addr);
1504         if (psta == NULL) {
1505                 u8 type = GetFrameType(pfhdr->rx_data);
1506                 if (type != WIFI_DATA_TYPE) {
1507                         psta = rtw_get_bcmc_stainfo(padapter);
1508                         pdefrag_q = &psta->sta_recvpriv.defrag_q;
1509                 } else {
1510                         pdefrag_q = NULL;
1511                 }
1512         } else {
1513                 pdefrag_q = &psta->sta_recvpriv.defrag_q;
1514         }
1515
1516         if ((ismfrag == 0) && (fragnum == 0))
1517                 prtnframe = precv_frame;/* isn't a fragment frame */
1518
1519         if (ismfrag == 1) {
1520                 /* 0~(n-1) fragment frame */
1521                 /* enqueue to defraf_g */
1522                 if (pdefrag_q != NULL) {
1523                         if (fragnum == 0) {
1524                                 /* the first fragment */
1525                                 if (!list_empty(&pdefrag_q->queue))
1526                                         /* free current defrag_q */
1527                                         rtw_free_recvframe_queue(pdefrag_q, pfree_recv_queue);
1528                         }
1529
1530                         /* Then enqueue the 0~(n-1) fragment into the defrag_q */
1531
1532                         phead = get_list_head(pdefrag_q);
1533                         list_add_tail(&pfhdr->list, phead);
1534
1535                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("Enqueuq: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1536
1537                         prtnframe = NULL;
1538                 } else {
1539                         /* can't find this ta's defrag_queue, so free this recv_frame */
1540                         rtw_free_recvframe(precv_frame, pfree_recv_queue);
1541                         prtnframe = NULL;
1542                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("Free because pdefrag_q==NULL: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1543                 }
1544         }
1545
1546         if ((ismfrag == 0) && (fragnum != 0)) {
1547                 /* the last fragment frame */
1548                 /* enqueue the last fragment */
1549                 if (pdefrag_q != NULL) {
1550                         phead = get_list_head(pdefrag_q);
1551                         list_add_tail(&pfhdr->list, phead);
1552
1553                         /* call recvframe_defrag to defrag */
1554                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("defrag: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1555                         precv_frame = recvframe_defrag(padapter, pdefrag_q);
1556                         prtnframe = precv_frame;
1557                 } else {
1558                         /* can't find this ta's defrag_queue, so free this recv_frame */
1559                         rtw_free_recvframe(precv_frame, pfree_recv_queue);
1560                         prtnframe = NULL;
1561                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("Free because pdefrag_q==NULL: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1562                 }
1563         }
1564
1565         if ((prtnframe != NULL) && (prtnframe->attrib.privacy)) {
1566                 /* after defrag we must check tkip mic code */
1567                 if (recvframe_chkmic(padapter,  prtnframe) == _FAIL) {
1568                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recvframe_chkmic(padapter,  prtnframe)==_FAIL\n"));
1569                         rtw_free_recvframe(prtnframe, pfree_recv_queue);
1570                         prtnframe = NULL;
1571                 }
1572         }
1573
1574         return prtnframe;
1575 }
1576
1577 static int amsdu_to_msdu(struct adapter *padapter, struct recv_frame *prframe)
1578 {
1579         int     a_len, padding_len;
1580         u16     eth_type, nSubframe_Length;
1581         u8      nr_subframes, i;
1582         unsigned char *pdata;
1583         struct rx_pkt_attrib *pattrib;
1584         unsigned char *data_ptr;
1585         struct sk_buff *sub_skb, *subframes[MAX_SUBFRAME_COUNT];
1586         struct recv_priv *precvpriv = &padapter->recvpriv;
1587         struct __queue *pfree_recv_queue = &(precvpriv->free_recv_queue);
1588         nr_subframes = 0;
1589
1590         pattrib = &prframe->attrib;
1591
1592         recvframe_pull(prframe, prframe->attrib.hdrlen);
1593
1594         if (prframe->attrib.iv_len > 0)
1595                 recvframe_pull(prframe, prframe->attrib.iv_len);
1596
1597         a_len = prframe->len;
1598
1599         pdata = prframe->rx_data;
1600
1601         while (a_len > ETH_HLEN) {
1602                 /* Offset 12 denote 2 mac address */
1603                 nSubframe_Length = get_unaligned_be16(pdata + 12);
1604
1605                 if (a_len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
1606                         DBG_88E("nRemain_Length is %d and nSubframe_Length is : %d\n", a_len, nSubframe_Length);
1607                         goto exit;
1608                 }
1609
1610                 /* move the data point to data content */
1611                 pdata += ETH_HLEN;
1612                 a_len -= ETH_HLEN;
1613
1614                 /* Allocate new skb for releasing to upper layer */
1615                 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
1616                 if (sub_skb) {
1617                         skb_reserve(sub_skb, 12);
1618                         data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
1619                         memcpy(data_ptr, pdata, nSubframe_Length);
1620                 } else {
1621                         sub_skb = skb_clone(prframe->pkt, GFP_ATOMIC);
1622                         if (sub_skb) {
1623                                 sub_skb->data = pdata;
1624                                 sub_skb->len = nSubframe_Length;
1625                                 skb_set_tail_pointer(sub_skb, nSubframe_Length);
1626                         } else {
1627                                 DBG_88E("skb_clone() Fail!!! , nr_subframes=%d\n", nr_subframes);
1628                                 break;
1629                         }
1630                 }
1631
1632                 subframes[nr_subframes++] = sub_skb;
1633
1634                 if (nr_subframes >= MAX_SUBFRAME_COUNT) {
1635                         DBG_88E("ParseSubframe(): Too many Subframes! Packets dropped!\n");
1636                         break;
1637                 }
1638
1639                 pdata += nSubframe_Length;
1640                 a_len -= nSubframe_Length;
1641                 if (a_len != 0) {
1642                         padding_len = 4 - ((nSubframe_Length + ETH_HLEN) & (4-1));
1643                         if (padding_len == 4)
1644                                 padding_len = 0;
1645
1646                         if (a_len < padding_len) {
1647                                 goto exit;
1648                         }
1649                         pdata += padding_len;
1650                         a_len -= padding_len;
1651                 }
1652         }
1653
1654         for (i = 0; i < nr_subframes; i++) {
1655                 sub_skb = subframes[i];
1656                 /* convert hdr + possible LLC headers into Ethernet header */
1657                 eth_type = get_unaligned_be16(&sub_skb->data[6]);
1658                 if (sub_skb->len >= 8 &&
1659                     ((!memcmp(sub_skb->data, rtw_rfc1042_header, SNAP_SIZE) &&
1660                           eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) ||
1661                          !memcmp(sub_skb->data, rtw_bridge_tunnel_header, SNAP_SIZE))) {
1662                         /* remove RFC1042 or Bridge-Tunnel encapsulation and replace EtherType */
1663                         skb_pull(sub_skb, SNAP_SIZE);
1664                         memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
1665                         memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
1666                 } else {
1667                         __be16 len;
1668                         /* Leave Ethernet header part of hdr and full payload */
1669                         len = htons(sub_skb->len);
1670                         memcpy(skb_push(sub_skb, 2), &len, 2);
1671                         memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
1672                         memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
1673                 }
1674
1675                 /* Indicate the packets to upper layer */
1676                 /*  Insert NAT2.5 RX here! */
1677                 sub_skb->protocol = eth_type_trans(sub_skb, padapter->pnetdev);
1678                 sub_skb->dev = padapter->pnetdev;
1679
1680                 sub_skb->ip_summed = CHECKSUM_NONE;
1681
1682                 netif_rx(sub_skb);
1683         }
1684
1685 exit:
1686
1687         prframe->len = 0;
1688         rtw_free_recvframe(prframe, pfree_recv_queue);/* free this recv_frame */
1689
1690         return _SUCCESS;
1691 }
1692
1693 static int check_indicate_seq(struct recv_reorder_ctrl *preorder_ctrl, u16 seq_num)
1694 {
1695         u8      wsize = preorder_ctrl->wsize_b;
1696         u16     wend = (preorder_ctrl->indicate_seq + wsize - 1) & 0xFFF;/*  4096; */
1697
1698         /*  Rx Reorder initialize condition. */
1699         if (preorder_ctrl->indicate_seq == 0xFFFF)
1700                 preorder_ctrl->indicate_seq = seq_num;
1701
1702         /*  Drop out the packet which SeqNum is smaller than WinStart */
1703         if (SN_LESS(seq_num, preorder_ctrl->indicate_seq))
1704                 return false;
1705
1706         /*  */
1707         /*  Sliding window manipulation. Conditions includes: */
1708         /*  1. Incoming SeqNum is equal to WinStart =>Window shift 1 */
1709         /*  2. Incoming SeqNum is larger than the WinEnd => Window shift N */
1710         /*  */
1711         if (SN_EQUAL(seq_num, preorder_ctrl->indicate_seq)) {
1712                 preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1) & 0xFFF;
1713         } else if (SN_LESS(wend, seq_num)) {
1714                 if (seq_num >= (wsize - 1))
1715                         preorder_ctrl->indicate_seq = seq_num + 1 - wsize;
1716                 else
1717                         preorder_ctrl->indicate_seq = 0xFFF - (wsize - (seq_num + 1)) + 1;
1718         }
1719
1720         return true;
1721 }
1722
1723 static int enqueue_reorder_recvframe(struct recv_reorder_ctrl *preorder_ctrl,
1724                                      struct recv_frame *prframe)
1725 {
1726         struct rx_pkt_attrib *pattrib = &prframe->attrib;
1727         struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1728         struct list_head *phead, *plist;
1729         struct recv_frame *hdr;
1730         struct rx_pkt_attrib *pnextattrib;
1731
1732         phead = get_list_head(ppending_recvframe_queue);
1733         plist = phead->next;
1734
1735         while (phead != plist) {
1736                 hdr = container_of(plist, struct recv_frame, list);
1737                 pnextattrib = &hdr->attrib;
1738
1739                 if (SN_LESS(pnextattrib->seq_num, pattrib->seq_num))
1740                         plist = plist->next;
1741                 else if (SN_EQUAL(pnextattrib->seq_num, pattrib->seq_num))
1742                         return false;
1743                 else
1744                         break;
1745         }
1746
1747         list_del_init(&(prframe->list));
1748
1749         list_add_tail(&(prframe->list), plist);
1750         return true;
1751 }
1752
1753 static int recv_indicatepkts_in_order(struct adapter *padapter, struct recv_reorder_ctrl *preorder_ctrl, int bforced)
1754 {
1755         struct list_head *phead, *plist;
1756         struct recv_frame *prframe;
1757         struct recv_frame *prhdr;
1758         struct rx_pkt_attrib *pattrib;
1759         int bPktInBuf = false;
1760         struct recv_priv *precvpriv = &padapter->recvpriv;
1761         struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1762
1763         phead =         get_list_head(ppending_recvframe_queue);
1764         plist = phead->next;
1765
1766         /*  Handling some condition for forced indicate case. */
1767         if (bforced) {
1768                 if (list_empty(phead))
1769                         return true;
1770
1771                 prhdr = container_of(plist, struct recv_frame, list);
1772                 pattrib = &prhdr->attrib;
1773                 preorder_ctrl->indicate_seq = pattrib->seq_num;
1774         }
1775
1776         /*  Prepare indication list and indication. */
1777         /*  Check if there is any packet need indicate. */
1778         while (!list_empty(phead)) {
1779                 prhdr = container_of(plist, struct recv_frame, list);
1780                 prframe = prhdr;
1781                 pattrib = &prframe->attrib;
1782
1783                 if (!SN_LESS(preorder_ctrl->indicate_seq, pattrib->seq_num)) {
1784                         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_,
1785                                  ("recv_indicatepkts_in_order: indicate=%d seq=%d amsdu=%d\n",
1786                                   preorder_ctrl->indicate_seq, pattrib->seq_num, pattrib->amsdu));
1787                         plist = plist->next;
1788                         list_del_init(&(prframe->list));
1789
1790                         if (SN_EQUAL(preorder_ctrl->indicate_seq, pattrib->seq_num))
1791                                 preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1) & 0xFFF;
1792
1793                         /* Set this as a lock to make sure that only one thread is indicating packet. */
1794
1795                         /* indicate this recv_frame */
1796                         if (!pattrib->amsdu) {
1797                                 if ((!padapter->bDriverStopped) &&
1798                                     (!padapter->bSurpriseRemoved))
1799                                         rtw_recv_indicatepkt(padapter, prframe);/* indicate this recv_frame */
1800                         } else if (pattrib->amsdu == 1) {
1801                                 if (amsdu_to_msdu(padapter, prframe) != _SUCCESS)
1802                                         rtw_free_recvframe(prframe, &precvpriv->free_recv_queue);
1803                         } else {
1804                                 /* error condition; */
1805                         }
1806
1807                         /* Update local variables. */
1808                         bPktInBuf = false;
1809                 } else {
1810                         bPktInBuf = true;
1811                         break;
1812                 }
1813         }
1814         return bPktInBuf;
1815 }
1816
1817 static int recv_indicatepkt_reorder(struct adapter *padapter,
1818                                     struct recv_frame *prframe)
1819 {
1820         int retval = _SUCCESS;
1821         struct rx_pkt_attrib *pattrib = &prframe->attrib;
1822         struct recv_reorder_ctrl *preorder_ctrl = prframe->preorder_ctrl;
1823         struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1824
1825         if (!pattrib->amsdu) {
1826                 /* s1. */
1827                 wlanhdr_to_ethhdr(prframe);
1828
1829                 if ((pattrib->qos != 1) || (pattrib->eth_type == 0x0806) ||
1830                     (pattrib->ack_policy != 0)) {
1831                         if ((!padapter->bDriverStopped) &&
1832                             (!padapter->bSurpriseRemoved)) {
1833                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("@@@@  recv_indicatepkt_reorder -recv_func recv_indicatepkt\n"));
1834
1835                                 rtw_recv_indicatepkt(padapter, prframe);
1836                                 return _SUCCESS;
1837                         }
1838
1839                         return _FAIL;
1840                 }
1841
1842                 if (!preorder_ctrl->enable) {
1843                         /* indicate this recv_frame */
1844                         preorder_ctrl->indicate_seq = pattrib->seq_num;
1845                         rtw_recv_indicatepkt(padapter, prframe);
1846
1847                         preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1)%4096;
1848                         return _SUCCESS;
1849                 }
1850         } else if (pattrib->amsdu == 1) { /* temp filter -> means didn't support A-MSDUs in a A-MPDU */
1851                 if (!preorder_ctrl->enable) {
1852                         preorder_ctrl->indicate_seq = pattrib->seq_num;
1853                         retval = amsdu_to_msdu(padapter, prframe);
1854
1855                         preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1)%4096;
1856                         return retval;
1857                 }
1858         }
1859
1860         spin_lock_bh(&ppending_recvframe_queue->lock);
1861
1862         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_,
1863                  ("recv_indicatepkt_reorder: indicate=%d seq=%d\n",
1864                   preorder_ctrl->indicate_seq, pattrib->seq_num));
1865
1866         /* s2. check if winstart_b(indicate_seq) needs to been updated */
1867         if (!check_indicate_seq(preorder_ctrl, pattrib->seq_num)) {
1868                 rtw_recv_indicatepkt(padapter, prframe);
1869
1870                 spin_unlock_bh(&ppending_recvframe_queue->lock);
1871
1872                 goto _success_exit;
1873         }
1874
1875         /* s3. Insert all packet into Reorder Queue to maintain its ordering. */
1876         if (!enqueue_reorder_recvframe(preorder_ctrl, prframe))
1877                 goto _err_exit;
1878
1879         /* s4. */
1880         /*  Indication process. */
1881         /*  After Packet dropping and Sliding Window shifting as above, we can now just indicate the packets */
1882         /*  with the SeqNum smaller than latest WinStart and buffer other packets. */
1883         /*  */
1884         /*  For Rx Reorder condition: */
1885         /*  1. All packets with SeqNum smaller than WinStart => Indicate */
1886         /*  2. All packets with SeqNum larger than or equal to WinStart => Buffer it. */
1887         /*  */
1888
1889         /* recv_indicatepkts_in_order(padapter, preorder_ctrl, true); */
1890         if (recv_indicatepkts_in_order(padapter, preorder_ctrl, false)) {
1891                 mod_timer(&preorder_ctrl->reordering_ctrl_timer,
1892                           jiffies + msecs_to_jiffies(REORDER_WAIT_TIME));
1893                 spin_unlock_bh(&ppending_recvframe_queue->lock);
1894         } else {
1895                 spin_unlock_bh(&ppending_recvframe_queue->lock);
1896                 del_timer_sync(&preorder_ctrl->reordering_ctrl_timer);
1897         }
1898
1899 _success_exit:
1900
1901         return _SUCCESS;
1902
1903 _err_exit:
1904
1905         spin_unlock_bh(&ppending_recvframe_queue->lock);
1906
1907         return _FAIL;
1908 }
1909
1910 void rtw_reordering_ctrl_timeout_handler(unsigned long data)
1911 {
1912         struct recv_reorder_ctrl *preorder_ctrl = (struct recv_reorder_ctrl *)data;
1913         struct adapter *padapter = preorder_ctrl->padapter;
1914         struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1915
1916         if (padapter->bDriverStopped || padapter->bSurpriseRemoved)
1917                 return;
1918
1919         spin_lock_bh(&ppending_recvframe_queue->lock);
1920
1921         if (recv_indicatepkts_in_order(padapter, preorder_ctrl, true) == true)
1922                 mod_timer(&preorder_ctrl->reordering_ctrl_timer,
1923                           jiffies + msecs_to_jiffies(REORDER_WAIT_TIME));
1924
1925         spin_unlock_bh(&ppending_recvframe_queue->lock);
1926 }
1927
1928 static int process_recv_indicatepkts(struct adapter *padapter,
1929                                      struct recv_frame *prframe)
1930 {
1931         int retval = _SUCCESS;
1932         struct mlme_priv        *pmlmepriv = &padapter->mlmepriv;
1933         struct ht_priv  *phtpriv = &pmlmepriv->htpriv;
1934
1935         if (phtpriv->ht_option) {  /* B/G/N Mode */
1936                 if (recv_indicatepkt_reorder(padapter, prframe) != _SUCCESS) {
1937                         /*  including perform A-MPDU Rx Ordering Buffer Control */
1938                         if ((!padapter->bDriverStopped) &&
1939                             (!padapter->bSurpriseRemoved)) {
1940                                 retval = _FAIL;
1941                                 return retval;
1942                         }
1943                 }
1944         } else { /* B/G mode */
1945                 retval = wlanhdr_to_ethhdr(prframe);
1946                 if (retval != _SUCCESS) {
1947                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("wlanhdr_to_ethhdr: drop pkt\n"));
1948                         return retval;
1949                 }
1950
1951                 if ((!padapter->bDriverStopped) &&
1952                     (!padapter->bSurpriseRemoved)) {
1953                         /* indicate this recv_frame */
1954                         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("@@@@ process_recv_indicatepkts- recv_func recv_indicatepkt\n"));
1955                         rtw_recv_indicatepkt(padapter, prframe);
1956                 } else {
1957                         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("@@@@ process_recv_indicatepkts- recv_func free_indicatepkt\n"));
1958
1959                         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("recv_func:bDriverStopped(%d) OR bSurpriseRemoved(%d)", padapter->bDriverStopped, padapter->bSurpriseRemoved));
1960                         retval = _FAIL;
1961                         return retval;
1962                 }
1963         }
1964
1965         return retval;
1966 }
1967
1968 static int recv_func_prehandle(struct adapter *padapter,
1969                                struct recv_frame *rframe)
1970 {
1971         int ret = _SUCCESS;
1972         struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
1973
1974         /* check the frame crtl field and decache */
1975         ret = validate_recv_frame(padapter, rframe);
1976         if (ret != _SUCCESS) {
1977                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("recv_func: validate_recv_frame fail! drop pkt\n"));
1978                 rtw_free_recvframe(rframe, pfree_recv_queue);/* free this recv_frame */
1979                 goto exit;
1980         }
1981
1982 exit:
1983         return ret;
1984 }
1985
1986 static int recv_func_posthandle(struct adapter *padapter,
1987                                 struct recv_frame *prframe)
1988 {
1989         int ret = _SUCCESS;
1990         struct recv_frame *orig_prframe = prframe;
1991         struct recv_priv *precvpriv = &padapter->recvpriv;
1992         struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
1993
1994         /*  DATA FRAME */
1995         rtw_led_control(padapter, LED_CTL_RX);
1996
1997         prframe = decryptor(padapter, prframe);
1998         if (prframe == NULL) {
1999                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("decryptor: drop pkt\n"));
2000                 ret = _FAIL;
2001                 goto _recv_data_drop;
2002         }
2003
2004         prframe = recvframe_chk_defrag(padapter, prframe);
2005         if (prframe == NULL) {
2006                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recvframe_chk_defrag: drop pkt\n"));
2007                 goto _recv_data_drop;
2008         }
2009
2010         prframe = portctrl(padapter, prframe);
2011         if (prframe == NULL) {
2012                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("portctrl: drop pkt\n"));
2013                 ret = _FAIL;
2014                 goto _recv_data_drop;
2015         }
2016
2017         count_rx_stats(padapter, prframe, NULL);
2018
2019         ret = process_recv_indicatepkts(padapter, prframe);
2020         if (ret != _SUCCESS) {
2021                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recv_func: process_recv_indicatepkts fail!\n"));
2022                 rtw_free_recvframe(orig_prframe, pfree_recv_queue);/* free this recv_frame */
2023                 goto _recv_data_drop;
2024         }
2025         return ret;
2026
2027 _recv_data_drop:
2028         precvpriv->rx_drop++;
2029         return ret;
2030 }
2031
2032 static int recv_func(struct adapter *padapter, struct recv_frame *rframe)
2033 {
2034         int ret;
2035         struct rx_pkt_attrib *prxattrib = &rframe->attrib;
2036         struct security_priv *psecuritypriv = &padapter->securitypriv;
2037         struct mlme_priv *mlmepriv = &padapter->mlmepriv;
2038
2039         /* check if need to handle uc_swdec_pending_queue*/
2040         if (check_fwstate(mlmepriv, WIFI_STATION_STATE) && psecuritypriv->busetkipkey) {
2041                 struct recv_frame *pending_frame;
2042
2043                 while ((pending_frame = rtw_alloc_recvframe(&padapter->recvpriv.uc_swdec_pending_queue))) {
2044                         if (recv_func_posthandle(padapter, pending_frame) == _SUCCESS)
2045                                 DBG_88E("%s: dequeue uc_swdec_pending_queue\n", __func__);
2046                 }
2047         }
2048
2049         ret = recv_func_prehandle(padapter, rframe);
2050
2051         if (ret == _SUCCESS) {
2052                 /* check if need to enqueue into uc_swdec_pending_queue*/
2053                 if (check_fwstate(mlmepriv, WIFI_STATION_STATE) &&
2054                     !IS_MCAST(prxattrib->ra) && prxattrib->encrypt > 0 &&
2055                     (prxattrib->bdecrypted == 0 || psecuritypriv->sw_decrypt) &&
2056                     !is_wep_enc(psecuritypriv->dot11PrivacyAlgrthm) &&
2057                     !psecuritypriv->busetkipkey) {
2058                         rtw_enqueue_recvframe(rframe, &padapter->recvpriv.uc_swdec_pending_queue);
2059                         DBG_88E("%s: no key, enqueue uc_swdec_pending_queue\n", __func__);
2060                         goto exit;
2061                 }
2062
2063                 ret = recv_func_posthandle(padapter, rframe);
2064         }
2065
2066 exit:
2067         return ret;
2068 }
2069
2070 s32 rtw_recv_entry(struct recv_frame *precvframe)
2071 {
2072         struct adapter *padapter;
2073         struct recv_priv *precvpriv;
2074         s32 ret = _SUCCESS;
2075
2076         padapter = precvframe->adapter;
2077
2078         precvpriv = &padapter->recvpriv;
2079
2080         ret = recv_func(padapter, precvframe);
2081         if (ret == _FAIL) {
2082                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("rtw_recv_entry: recv_func return fail!!!\n"));
2083                 goto _recv_entry_drop;
2084         }
2085
2086         precvpriv->rx_pkts++;
2087
2088         return ret;
2089
2090 _recv_entry_drop:
2091         return ret;
2092 }
2093
2094 static void rtw_signal_stat_timer_hdl(unsigned long data)
2095 {
2096         struct adapter *adapter = (struct adapter *)data;
2097         struct recv_priv *recvpriv = &adapter->recvpriv;
2098
2099         u32 tmp_s, tmp_q;
2100         u8 avg_signal_strength = 0;
2101         u8 avg_signal_qual = 0;
2102         u8 _alpha = 3; /*  this value is based on converging_constant = 5000 and sampling_interval = 1000 */
2103
2104         if (adapter->recvpriv.is_signal_dbg) {
2105                 /* update the user specific value, signal_strength_dbg, to signal_strength, rssi */
2106                 adapter->recvpriv.signal_strength = adapter->recvpriv.signal_strength_dbg;
2107                 adapter->recvpriv.rssi = (s8)translate_percentage_to_dbm((u8)adapter->recvpriv.signal_strength_dbg);
2108         } else {
2109                 if (recvpriv->signal_strength_data.update_req == 0) {/*  update_req is clear, means we got rx */
2110                         avg_signal_strength = recvpriv->signal_strength_data.avg_val;
2111                         /*  after avg_vals are acquired, we can re-stat the signal values */
2112                         recvpriv->signal_strength_data.update_req = 1;
2113                 }
2114
2115                 if (recvpriv->signal_qual_data.update_req == 0) {/*  update_req is clear, means we got rx */
2116                         avg_signal_qual = recvpriv->signal_qual_data.avg_val;
2117                         /*  after avg_vals are acquired, we can re-stat the signal values */
2118                         recvpriv->signal_qual_data.update_req = 1;
2119                 }
2120
2121                 /* update value of signal_strength, rssi, signal_qual */
2122                 if (check_fwstate(&adapter->mlmepriv, _FW_UNDER_SURVEY) == false) {
2123                         tmp_s = avg_signal_strength+(_alpha-1)*recvpriv->signal_strength;
2124                         if (tmp_s % _alpha)
2125                                 tmp_s = tmp_s/_alpha + 1;
2126                         else
2127                                 tmp_s = tmp_s/_alpha;
2128                         if (tmp_s > 100)
2129                                 tmp_s = 100;
2130
2131                         tmp_q = avg_signal_qual+(_alpha-1)*recvpriv->signal_qual;
2132                         if (tmp_q % _alpha)
2133                                 tmp_q = tmp_q/_alpha + 1;
2134                         else
2135                                 tmp_q = tmp_q/_alpha;
2136                         if (tmp_q > 100)
2137                                 tmp_q = 100;
2138
2139                         recvpriv->signal_strength = tmp_s;
2140                         recvpriv->rssi = (s8)translate_percentage_to_dbm(tmp_s);
2141                         recvpriv->signal_qual = tmp_q;
2142                 }
2143         }
2144         rtw_set_signal_stat_timer(recvpriv);
2145 }