kernel/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  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  *
  19  ******************************************************************************/
  20 #define _RTW_RECV_C_
  21
  22 #include <osdep_service.h>
  23 #include <drv_types.h>
  24 #include <recv_osdep.h>
  25 #include <mlme_osdep.h>
  26 #include <wifi.h>
  27 #include <linux/vmalloc.h>
  28
  29 #define ETHERNET_HEADER_SIZE    14      /*  Ethernet Header Length */
  30 #define LLC_HEADER_SIZE                 6       /*  LLC Header Length */
  31
  32 static u8 SNAP_ETH_TYPE_IPX[2] = {0x81, 0x37};
  33 static u8 SNAP_ETH_TYPE_APPLETALK_AARP[2] = {0x80, 0xf3};
  34
  35 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
  36 static u8 rtw_bridge_tunnel_header[] = {
  37        0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8
  38 };
  39
  40 static u8 rtw_rfc1042_header[] = {
  41        0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00
  42 };
  43
  44 void rtw_signal_stat_timer_hdl(unsigned long data);
  45
  46 void _rtw_init_sta_recv_priv(struct sta_recv_priv *psta_recvpriv)
  47 {
  48
  49         memset((u8 *)psta_recvpriv, 0, sizeof(struct sta_recv_priv));
  50
  51         spin_lock_init(&psta_recvpriv->lock);
  52
  53         _rtw_init_queue(&psta_recvpriv->defrag_q);
  54
  55 }
  56
  57 int _rtw_init_recv_priv(struct recv_priv *precvpriv, struct adapter *padapter)
  58 {
  59         int i;
  60
  61         struct recv_frame *precvframe;
  62
  63         int     res = _SUCCESS;
  64
  65         _rtw_init_queue(&precvpriv->free_recv_queue);
  66         _rtw_init_queue(&precvpriv->recv_pending_queue);
  67         _rtw_init_queue(&precvpriv->uc_swdec_pending_queue);
  68
  69         precvpriv->adapter = padapter;
  70
  71         precvpriv->free_recvframe_cnt = NR_RECVFRAME;
  72
  73         precvpriv->pallocated_frame_buf = vzalloc(NR_RECVFRAME * sizeof(struct recv_frame) + RXFRAME_ALIGN_SZ);
  74
  75         if (precvpriv->pallocated_frame_buf == NULL) {
  76                 res = _FAIL;
  77                 goto exit;
  78         }
  79
  80         precvpriv->precv_frame_buf = (u8 *)N_BYTE_ALIGMENT((size_t)(precvpriv->pallocated_frame_buf), RXFRAME_ALIGN_SZ);
  81
  82         precvframe = (struct recv_frame *)precvpriv->precv_frame_buf;
  83
  84         for (i = 0; i < NR_RECVFRAME; i++) {
  85                 INIT_LIST_HEAD(&(precvframe->list));
  86
  87                 list_add_tail(&(precvframe->list),
  88                                      &(precvpriv->free_recv_queue.queue));
  89
  90                 res = rtw_os_recv_resource_alloc(padapter, precvframe);
  91
  92                 precvframe->len = 0;
  93
  94                 precvframe->adapter = padapter;
  95                 precvframe++;
  96         }
  97         precvpriv->rx_pending_cnt = 1;
  98
  99         res = rtw_hal_init_recv_priv(padapter);
 100
 101         setup_timer(&precvpriv->signal_stat_timer,
 102                     rtw_signal_stat_timer_hdl,
 103                     (unsigned long)padapter);
 104
 105         precvpriv->signal_stat_sampling_interval = 1000; /* ms */
 106
 107         rtw_set_signal_stat_timer(precvpriv);
 108 exit:
 109
 110
 111         return res;
 112 }
 113
 114 void _rtw_free_recv_priv(struct recv_priv *precvpriv)
 115 {
 116         struct adapter  *padapter = precvpriv->adapter;
 117
 118
 119         rtw_free_uc_swdec_pending_queue(padapter);
 120
 121         if (precvpriv->pallocated_frame_buf) {
 122                 vfree(precvpriv->pallocated_frame_buf);
 123         }
 124
 125         rtw_hal_free_recv_priv(padapter);
 126
 127 }
 128
 129 struct recv_frame *_rtw_alloc_recvframe(struct __queue *pfree_recv_queue)
 130 {
 131         struct recv_frame *hdr;
 132         struct list_head *plist, *phead;
 133         struct adapter *padapter;
 134         struct recv_priv *precvpriv;
 135
 136         if (list_empty(&pfree_recv_queue->queue)) {
 137                 hdr = NULL;
 138         } else {
 139                 phead = get_list_head(pfree_recv_queue);
 140
 141                 plist = phead->next;
 142
 143                 hdr = container_of(plist, struct recv_frame, list);
 144
 145                 list_del_init(&hdr->list);
 146                 padapter = hdr->adapter;
 147                 if (padapter != NULL) {
 148                         precvpriv = &padapter->recvpriv;
 149                         if (pfree_recv_queue == &precvpriv->free_recv_queue)
 150                                 precvpriv->free_recvframe_cnt--;
 151                 }
 152         }
 153
 154
 155         return (struct recv_frame *)hdr;
 156 }
 157
 158 struct recv_frame *rtw_alloc_recvframe(struct __queue *pfree_recv_queue)
 159 {
 160         struct recv_frame  *precvframe;
 161
 162         spin_lock_bh(&pfree_recv_queue->lock);
 163
 164         precvframe = _rtw_alloc_recvframe(pfree_recv_queue);
 165
 166         spin_unlock_bh(&pfree_recv_queue->lock);
 167
 168         return precvframe;
 169 }
 170
 171 void rtw_init_recvframe(struct recv_frame *precvframe, struct recv_priv *precvpriv)
 172 {
 173         /* Perry: This can be removed */
 174         INIT_LIST_HEAD(&precvframe->list);
 175
 176         precvframe->len = 0;
 177 }
 178
 179 int rtw_free_recvframe(struct recv_frame *precvframe,
 180                        struct __queue *pfree_recv_queue)
 181 {
 182         struct adapter *padapter;
 183         struct recv_priv *precvpriv;
 184
 185         if (!precvframe)
 186                 return _FAIL;
 187         padapter = precvframe->adapter;
 188         precvpriv = &padapter->recvpriv;
 189         if (precvframe->pkt) {
 190                 dev_kfree_skb_any(precvframe->pkt);/* free skb by driver */
 191                 precvframe->pkt = NULL;
 192         }
 193
 194         spin_lock_bh(&pfree_recv_queue->lock);
 195
 196         list_del_init(&(precvframe->list));
 197
 198         precvframe->len = 0;
 199
 200         list_add_tail(&(precvframe->list), get_list_head(pfree_recv_queue));
 201
 202         if (padapter != NULL) {
 203                 if (pfree_recv_queue == &precvpriv->free_recv_queue)
 204                                 precvpriv->free_recvframe_cnt++;
 205         }
 206
 207       spin_unlock_bh(&pfree_recv_queue->lock);
 208
 209
 210         return _SUCCESS;
 211 }
 212
 213 int _rtw_enqueue_recvframe(struct recv_frame *precvframe, struct __queue *queue)
 214 {
 215         struct adapter *padapter = precvframe->adapter;
 216         struct recv_priv *precvpriv = &padapter->recvpriv;
 217
 218
 219         list_del_init(&(precvframe->list));
 220         list_add_tail(&(precvframe->list), get_list_head(queue));
 221
 222         if (padapter != NULL) {
 223                 if (queue == &precvpriv->free_recv_queue)
 224                         precvpriv->free_recvframe_cnt++;
 225         }
 226
 227
 228         return _SUCCESS;
 229 }
 230
 231 int rtw_enqueue_recvframe(struct recv_frame *precvframe, struct __queue *queue)
 232 {
 233         int ret;
 234
 235         spin_lock_bh(&queue->lock);
 236         ret = _rtw_enqueue_recvframe(precvframe, queue);
 237         spin_unlock_bh(&queue->lock);
 238
 239         return ret;
 240 }
 241
 242 /*
 243 caller : defrag ; recvframe_chk_defrag in recv_thread  (passive)
 244 pframequeue: defrag_queue : will be accessed in recv_thread  (passive)
 245
 246 using spinlock to protect
 247
 248 */
 249
 250 void rtw_free_recvframe_queue(struct __queue *pframequeue,  struct __queue *pfree_recv_queue)
 251 {
 252         struct recv_frame *hdr;
 253         struct list_head *plist, *phead;
 254
 255         spin_lock(&pframequeue->lock);
 256
 257         phead = get_list_head(pframequeue);
 258         plist = phead->next;
 259
 260         while (phead != plist) {
 261                 hdr = container_of(plist, struct recv_frame, list);
 262
 263                 plist = plist->next;
 264
 265                 rtw_free_recvframe((struct recv_frame *)hdr, pfree_recv_queue);
 266         }
 267
 268         spin_unlock(&pframequeue->lock);
 269
 270 }
 271
 272 u32 rtw_free_uc_swdec_pending_queue(struct adapter *adapter)
 273 {
 274         u32 cnt = 0;
 275         struct recv_frame *pending_frame;
 276         while ((pending_frame = rtw_alloc_recvframe(&adapter->recvpriv.uc_swdec_pending_queue))) {
 277                 rtw_free_recvframe(pending_frame, &adapter->recvpriv.free_recv_queue);
 278                 DBG_88E("%s: dequeue uc_swdec_pending_queue\n", __func__);
 279                 cnt++;
 280         }
 281
 282         return cnt;
 283 }
 284
 285 static int recvframe_chkmic(struct adapter *adapter,
 286                             struct recv_frame *precvframe)
 287 {
 288         int     i, res = _SUCCESS;
 289         u32     datalen;
 290         u8      miccode[8];
 291         u8      bmic_err = false, brpt_micerror = true;
 292         u8      *pframe, *payload, *pframemic;
 293         u8      *mickey;
 294         struct  sta_info                *stainfo;
 295         struct  rx_pkt_attrib   *prxattrib = &precvframe->attrib;
 296         struct  security_priv   *psecuritypriv = &adapter->securitypriv;
 297
 298         struct mlme_ext_priv    *pmlmeext = &adapter->mlmeextpriv;
 299         struct mlme_ext_info    *pmlmeinfo = &(pmlmeext->mlmext_info);
 300
 301         stainfo = rtw_get_stainfo(&adapter->stapriv, &prxattrib->ta[0]);
 302
 303         if (prxattrib->encrypt == _TKIP_) {
 304                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n recvframe_chkmic:prxattrib->encrypt==_TKIP_\n"));
 305                 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",
 306                          prxattrib->ra[0], prxattrib->ra[1], prxattrib->ra[2], prxattrib->ra[3], prxattrib->ra[4], prxattrib->ra[5]));
 307
 308                 /* calculate mic code */
 309                 if (stainfo != NULL) {
 310                         if (IS_MCAST(prxattrib->ra)) {
 311                                 if (!psecuritypriv) {
 312                                         res = _FAIL;
 313                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("\n recvframe_chkmic:didn't install group key!!!!!!!!!!\n"));
 314                                         DBG_88E("\n recvframe_chkmic:didn't install group key!!!!!!!!!!\n");
 315                                         goto exit;
 316                                 }
 317                                 mickey = &psecuritypriv->dot118021XGrprxmickey[prxattrib->key_index].skey[0];
 318
 319                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n recvframe_chkmic: bcmc key\n"));
 320                         } else {
 321                                 mickey = &stainfo->dot11tkiprxmickey.skey[0];
 322                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("\n recvframe_chkmic: unicast key\n"));
 323                         }
 324
 325                         /* icv_len included the mic code */
 326                         datalen = precvframe->len-prxattrib->hdrlen -
 327                                   prxattrib->iv_len-prxattrib->icv_len-8;
 328                         pframe = precvframe->rx_data;
 329                         payload = pframe+prxattrib->hdrlen+prxattrib->iv_len;
 330
 331                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n prxattrib->iv_len=%d prxattrib->icv_len=%d\n", prxattrib->iv_len, prxattrib->icv_len));
 332                         rtw_seccalctkipmic(mickey, pframe, payload, datalen, &miccode[0],
 333                                            (unsigned char)prxattrib->priority); /* care the length of the data */
 334
 335                         pframemic = payload+datalen;
 336
 337                         bmic_err = false;
 338
 339                         for (i = 0; i < 8; i++) {
 340                                 if (miccode[i] != *(pframemic+i)) {
 341                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
 342                                                  ("recvframe_chkmic:miccode[%d](%02x)!=*(pframemic+%d)(%02x) ",
 343                                                  i, miccode[i], i, *(pframemic+i)));
 344                                         bmic_err = true;
 345                                 }
 346                         }
 347
 348                         if (bmic_err) {
 349                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
 350                                          ("\n *(pframemic-8)-*(pframemic-1)=0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n",
 351                                          *(pframemic-8), *(pframemic-7), *(pframemic-6),
 352                                          *(pframemic-5), *(pframemic-4), *(pframemic-3),
 353                                          *(pframemic-2), *(pframemic-1)));
 354                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
 355                                          ("\n *(pframemic-16)-*(pframemic-9)=0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n",
 356                                          *(pframemic-16), *(pframemic-15), *(pframemic-14),
 357                                          *(pframemic-13), *(pframemic-12), *(pframemic-11),
 358                                          *(pframemic-10), *(pframemic-9)));
 359                                 {
 360                                         uint i;
 361                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
 362                                                  ("\n ======demp packet (len=%d)======\n",
 363                                                  precvframe->len));
 364                                         for (i = 0; i < precvframe->len; i += 8) {
 365                                                 RT_TRACE(_module_rtl871x_recv_c_,
 366                                                          _drv_err_,
 367                                                          ("0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x",
 368                                                          *(precvframe->rx_data+i),
 369                                                          *(precvframe->rx_data+i+1),
 370                                                          *(precvframe->rx_data+i+2),
 371                                                          *(precvframe->rx_data+i+3),
 372                                                          *(precvframe->rx_data+i+4),
 373                                                          *(precvframe->rx_data+i+5),
 374                                                          *(precvframe->rx_data+i+6),
 375                                                          *(precvframe->rx_data+i+7)));
 376                                         }
 377                                         RT_TRACE(_module_rtl871x_recv_c_,
 378                                                  _drv_err_,
 379                                                  ("\n ====== demp packet end [len=%d]======\n",
 380                                                  precvframe->len));
 381                                         RT_TRACE(_module_rtl871x_recv_c_,
 382                                                  _drv_err_,
 383                                                  ("\n hrdlen=%d,\n",
 384                                                  prxattrib->hdrlen));
 385                                 }
 386
 387                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
 388                                          ("ra=0x%.2x 0x%.2x 0x%.2x 0x%.2x 0x%.2x 0x%.2x psecuritypriv->binstallGrpkey=%d ",
 389                                          prxattrib->ra[0], prxattrib->ra[1], prxattrib->ra[2],
 390                                          prxattrib->ra[3], prxattrib->ra[4], prxattrib->ra[5], psecuritypriv->binstallGrpkey));
 391
 392                                 /*  double check key_index for some timing issue , */
 393                                 /*  cannot compare with psecuritypriv->dot118021XGrpKeyid also cause timing issue */
 394                                 if ((IS_MCAST(prxattrib->ra) == true)  && (prxattrib->key_index != pmlmeinfo->key_index))
 395                                         brpt_micerror = false;
 396
 397                                 if ((prxattrib->bdecrypted) && (brpt_micerror)) {
 398                                         rtw_handle_tkip_mic_err(adapter, (u8)IS_MCAST(prxattrib->ra));
 399                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" mic error :prxattrib->bdecrypted=%d ", prxattrib->bdecrypted));
 400                                         DBG_88E(" mic error :prxattrib->bdecrypted=%d\n", prxattrib->bdecrypted);
 401                                 } else {
 402                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" mic error :prxattrib->bdecrypted=%d ", prxattrib->bdecrypted));
 403                                         DBG_88E(" mic error :prxattrib->bdecrypted=%d\n", prxattrib->bdecrypted);
 404                                 }
 405                                 res = _FAIL;
 406                         } else {
 407                                 /* mic checked ok */
 408                                 if ((!psecuritypriv->bcheck_grpkey) && (IS_MCAST(prxattrib->ra))) {
 409                                         psecuritypriv->bcheck_grpkey = true;
 410                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("psecuritypriv->bcheck_grpkey = true"));
 411                                 }
 412                         }
 413                 } else {
 414                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recvframe_chkmic: rtw_get_stainfo==NULL!!!\n"));
 415                 }
 416
 417                 recvframe_pull_tail(precvframe, 8);
 418         }
 419
 420 exit:
 421
 422
 423         return res;
 424 }
 425
 426 /* decrypt and set the ivlen, icvlen of the recv_frame */
 427 static struct recv_frame *decryptor(struct adapter *padapter,
 428                                     struct recv_frame *precv_frame)
 429 {
 430         struct rx_pkt_attrib *prxattrib = &precv_frame->attrib;
 431         struct security_priv *psecuritypriv = &padapter->securitypriv;
 432         struct recv_frame *return_packet = precv_frame;
 433         u32      res = _SUCCESS;
 434
 435         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("prxstat->decrypted=%x prxattrib->encrypt=0x%03x\n", prxattrib->bdecrypted, prxattrib->encrypt));
 436
 437         if (prxattrib->encrypt > 0) {
 438                 u8 *iv = precv_frame->rx_data+prxattrib->hdrlen;
 439                 prxattrib->key_index = (((iv[3])>>6)&0x3);
 440
 441                 if (prxattrib->key_index > WEP_KEYS) {
 442                         DBG_88E("prxattrib->key_index(%d)>WEP_KEYS\n", prxattrib->key_index);
 443
 444                         switch (prxattrib->encrypt) {
 445                         case _WEP40_:
 446                         case _WEP104_:
 447                                 prxattrib->key_index = psecuritypriv->dot11PrivacyKeyIndex;
 448                                 break;
 449                         case _TKIP_:
 450                         case _AES_:
 451                         default:
 452                                 prxattrib->key_index = psecuritypriv->dot118021XGrpKeyid;
 453                                 break;
 454                         }
 455                 }
 456         }
 457
 458         if ((prxattrib->encrypt > 0) && ((prxattrib->bdecrypted == 0) || (psecuritypriv->sw_decrypt))) {
 459                 psecuritypriv->hw_decrypted = false;
 460
 461                 switch (prxattrib->encrypt) {
 462                 case _WEP40_:
 463                 case _WEP104_:
 464                         rtw_wep_decrypt(padapter, (u8 *)precv_frame);
 465                         break;
 466                 case _TKIP_:
 467                         res = rtw_tkip_decrypt(padapter, (u8 *)precv_frame);
 468                         break;
 469                 case _AES_:
 470                         res = rtw_aes_decrypt(padapter, (u8 *)precv_frame);
 471                         break;
 472                 default:
 473                         break;
 474                 }
 475         } else if (prxattrib->bdecrypted == 1 && prxattrib->encrypt > 0 &&
 476                    (psecuritypriv->busetkipkey == 1 || prxattrib->encrypt != _TKIP_))
 477                         psecuritypriv->hw_decrypted = true;
 478
 479         if (res == _FAIL) {
 480                 rtw_free_recvframe(return_packet, &padapter->recvpriv.free_recv_queue);
 481                 return_packet = NULL;
 482         }
 483
 484
 485         return return_packet;
 486 }
 487
 488 /* set the security information in the recv_frame */
 489 static struct recv_frame *portctrl(struct adapter *adapter,
 490                                    struct recv_frame *precv_frame)
 491 {
 492         u8   *psta_addr, *ptr;
 493         uint  auth_alg;
 494         struct recv_frame *pfhdr;
 495         struct sta_info *psta;
 496         struct sta_priv *pstapriv;
 497         struct recv_frame *prtnframe;
 498         u16     ether_type;
 499         u16  eapol_type = 0x888e;/* for Funia BD's WPA issue */
 500         struct rx_pkt_attrib *pattrib;
 501         __be16 be_tmp;
 502
 503
 504         pstapriv = &adapter->stapriv;
 505
 506         auth_alg = adapter->securitypriv.dot11AuthAlgrthm;
 507
 508         ptr = precv_frame->rx_data;
 509         pfhdr = precv_frame;
 510         pattrib = &pfhdr->attrib;
 511         psta_addr = pattrib->ta;
 512         psta = rtw_get_stainfo(pstapriv, psta_addr);
 513
 514         prtnframe = NULL;
 515
 516         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:adapter->securitypriv.dot11AuthAlgrthm=%d\n", adapter->securitypriv.dot11AuthAlgrthm));
 517
 518         if (auth_alg == 2) {
 519                 /* get ether_type */
 520                 ptr = ptr + pfhdr->attrib.hdrlen + LLC_HEADER_SIZE;
 521                 memcpy(&be_tmp, ptr, 2);
 522                 ether_type = ntohs(be_tmp);
 523
 524                 if ((psta != NULL) && (psta->ieee8021x_blocked)) {
 525                         /* blocked */
 526                         /* only accept EAPOL frame */
 527                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:psta->ieee8021x_blocked==1\n"));
 528
 529                         if (ether_type == eapol_type) {
 530                                 prtnframe = precv_frame;
 531                         } else {
 532                                 /* free this frame */
 533                                 rtw_free_recvframe(precv_frame, &adapter->recvpriv.free_recv_queue);
 534                                 prtnframe = NULL;
 535                         }
 536                 } else {
 537                         /* allowed */
 538                         /* check decryption status, and decrypt the frame if needed */
 539                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:psta->ieee8021x_blocked==0\n"));
 540                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
 541                                  ("portctrl:precv_frame->hdr.attrib.privacy=%x\n",
 542                                  precv_frame->attrib.privacy));
 543
 544                         if (pattrib->bdecrypted == 0)
 545                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("portctrl:prxstat->decrypted=%x\n", pattrib->bdecrypted));
 546
 547                         prtnframe = precv_frame;
 548                         /* check is the EAPOL frame or not (Rekey) */
 549                         if (ether_type == eapol_type) {
 550                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("########portctrl:ether_type==0x888e\n"));
 551                                 /* check Rekey */
 552
 553                                 prtnframe = precv_frame;
 554                         } else {
 555                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:ether_type=0x%04x\n", ether_type));
 556                         }
 557                 }
 558         } else {
 559                 prtnframe = precv_frame;
 560         }
 561
 562
 563                 return prtnframe;
 564 }
 565
 566 static int recv_decache(struct recv_frame *precv_frame, u8 bretry,
 567                         struct stainfo_rxcache *prxcache)
 568 {
 569         int tid = precv_frame->attrib.priority;
 570
 571         u16 seq_ctrl = ((precv_frame->attrib.seq_num&0xffff) << 4) |
 572                 (precv_frame->attrib.frag_num & 0xf);
 573
 574
 575         if (tid > 15) {
 576                 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("recv_decache, (tid>15)! seq_ctrl=0x%x, tid=0x%x\n", seq_ctrl, tid));
 577
 578                 return _FAIL;
 579         }
 580
 581         if (1) {/* if (bretry) */
 582                 if (seq_ctrl == prxcache->tid_rxseq[tid]) {
 583                         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]));
 584
 585                         return _FAIL;
 586                 }
 587         }
 588
 589         prxcache->tid_rxseq[tid] = seq_ctrl;
 590
 591
 592         return _SUCCESS;
 593 }
 594
 595 static void process_pwrbit_data(struct adapter *padapter,
 596                                 struct recv_frame *precv_frame)
 597 {
 598 #ifdef CONFIG_88EU_AP_MODE
 599         unsigned char pwrbit;
 600         u8 *ptr = precv_frame->rx_data;
 601         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 602         struct sta_priv *pstapriv = &padapter->stapriv;
 603         struct sta_info *psta = NULL;
 604
 605         psta = rtw_get_stainfo(pstapriv, pattrib->src);
 606
 607         pwrbit = GetPwrMgt(ptr);
 608
 609         if (psta) {
 610                 if (pwrbit) {
 611                         if (!(psta->state & WIFI_SLEEP_STATE))
 612                                 stop_sta_xmit(padapter, psta);
 613                 } else {
 614                         if (psta->state & WIFI_SLEEP_STATE)
 615                                 wakeup_sta_to_xmit(padapter, psta);
 616                 }
 617         }
 618
 619 #endif
 620 }
 621
 622 static void process_wmmps_data(struct adapter *padapter,
 623                                struct recv_frame *precv_frame)
 624 {
 625 #ifdef CONFIG_88EU_AP_MODE
 626         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 627         struct sta_priv *pstapriv = &padapter->stapriv;
 628         struct sta_info *psta = NULL;
 629
 630         psta = rtw_get_stainfo(pstapriv, pattrib->src);
 631
 632         if (!psta)
 633                 return;
 634
 635         if (!psta->qos_option)
 636                 return;
 637
 638         if (!(psta->qos_info&0xf))
 639                 return;
 640
 641         if (psta->state&WIFI_SLEEP_STATE) {
 642                 u8 wmmps_ac = 0;
 643
 644                 switch (pattrib->priority) {
 645                 case 1:
 646                 case 2:
 647                         wmmps_ac = psta->uapsd_bk&BIT(1);
 648                         break;
 649                 case 4:
 650                 case 5:
 651                         wmmps_ac = psta->uapsd_vi&BIT(1);
 652                         break;
 653                 case 6:
 654                 case 7:
 655                         wmmps_ac = psta->uapsd_vo&BIT(1);
 656                         break;
 657                 case 0:
 658                 case 3:
 659                 default:
 660                         wmmps_ac = psta->uapsd_be&BIT(1);
 661                         break;
 662                 }
 663
 664                 if (wmmps_ac) {
 665                         if (psta->sleepq_ac_len > 0) {
 666                                 /* process received triggered frame */
 667                                 xmit_delivery_enabled_frames(padapter, psta);
 668                         } else {
 669                                 /* issue one qos null frame with More data bit = 0 and the EOSP bit set (= 1) */
 670                                 issue_qos_nulldata(padapter, psta->hwaddr, (u16)pattrib->priority, 0, 0);
 671                         }
 672                 }
 673         }
 674
 675 #endif
 676 }
 677
 678 static void count_rx_stats(struct adapter *padapter,
 679                            struct recv_frame *prframe,
 680                            struct sta_info *sta)
 681 {
 682         int     sz;
 683         struct sta_info         *psta = NULL;
 684         struct stainfo_stats    *pstats = NULL;
 685         struct rx_pkt_attrib    *pattrib = &prframe->attrib;
 686         struct recv_priv        *precvpriv = &padapter->recvpriv;
 687
 688         sz = prframe->len;
 689         precvpriv->rx_bytes += sz;
 690
 691         padapter->mlmepriv.LinkDetectInfo.NumRxOkInPeriod++;
 692
 693         if ((!MacAddr_isBcst(pattrib->dst)) && (!IS_MCAST(pattrib->dst)))
 694                 padapter->mlmepriv.LinkDetectInfo.NumRxUnicastOkInPeriod++;
 695
 696         if (sta)
 697                 psta = sta;
 698         else
 699                 psta = prframe->psta;
 700
 701         if (psta) {
 702                 pstats = &psta->sta_stats;
 703
 704                 pstats->rx_data_pkts++;
 705                 pstats->rx_bytes += sz;
 706         }
 707 }
 708
 709 int sta2sta_data_frame(
 710         struct adapter *adapter,
 711         struct recv_frame *precv_frame,
 712         struct sta_info **psta
 713 );
 714
 715 int sta2sta_data_frame(struct adapter *adapter, struct recv_frame *precv_frame,
 716                        struct sta_info **psta)
 717 {
 718         u8 *ptr = precv_frame->rx_data;
 719         int ret = _SUCCESS;
 720         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 721         struct  sta_priv *pstapriv = &adapter->stapriv;
 722         struct  mlme_priv *pmlmepriv = &adapter->mlmepriv;
 723         u8 *mybssid  = get_bssid(pmlmepriv);
 724         u8 *myhwaddr = myid(&adapter->eeprompriv);
 725         u8 *sta_addr = NULL;
 726         int bmcast = IS_MCAST(pattrib->dst);
 727
 728
 729         if ((check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) == true) ||
 730             (check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE) == true)) {
 731                 /*  filter packets that SA is myself or multicast or broadcast */
 732                 if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN)) {
 733                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" SA==myself\n"));
 734                         ret = _FAIL;
 735                         goto exit;
 736                 }
 737
 738                 if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast)) {
 739                         ret = _FAIL;
 740                         goto exit;
 741                 }
 742
 743                 if (!memcmp(pattrib->bssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
 744                     !memcmp(mybssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
 745                     memcmp(pattrib->bssid, mybssid, ETH_ALEN)) {
 746                         ret = _FAIL;
 747                         goto exit;
 748                 }
 749
 750                 sta_addr = pattrib->src;
 751         } else if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
 752                 /*  For Station mode, sa and bssid should always be BSSID, and DA is my mac-address */
 753                 if (memcmp(pattrib->bssid, pattrib->src, ETH_ALEN)) {
 754                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("bssid!=TA under STATION_MODE; drop pkt\n"));
 755                         ret = _FAIL;
 756                         goto exit;
 757                 }
 758                 sta_addr = pattrib->bssid;
 759         } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
 760                 if (bmcast) {
 761                         /*  For AP mode, if DA == MCAST, then BSSID should be also MCAST */
 762                         if (!IS_MCAST(pattrib->bssid)) {
 763                                         ret = _FAIL;
 764                                         goto exit;
 765                         }
 766                 } else { /*  not mc-frame */
 767                         /*  For AP mode, if DA is non-MCAST, then it must be BSSID, and bssid == BSSID */
 768                         if (memcmp(pattrib->bssid, pattrib->dst, ETH_ALEN)) {
 769                                 ret = _FAIL;
 770                                 goto exit;
 771                         }
 772
 773                         sta_addr = pattrib->src;
 774                 }
 775         } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
 776                 memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN);
 777                 memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN);
 778                 memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN);
 779                 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
 780                 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
 781
 782                 sta_addr = mybssid;
 783         } else {
 784                 ret  = _FAIL;
 785         }
 786
 787         if (bmcast)
 788                 *psta = rtw_get_bcmc_stainfo(adapter);
 789         else
 790                 *psta = rtw_get_stainfo(pstapriv, sta_addr); /*  get ap_info */
 791
 792         if (*psta == NULL) {
 793                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("can't get psta under sta2sta_data_frame ; drop pkt\n"));
 794                 ret = _FAIL;
 795                 goto exit;
 796         }
 797
 798 exit:
 799         return ret;
 800 }
 801
 802 static int ap2sta_data_frame(
 803         struct adapter *adapter,
 804         struct recv_frame *precv_frame,
 805         struct sta_info **psta)
 806 {
 807         u8 *ptr = precv_frame->rx_data;
 808         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 809         int ret = _SUCCESS;
 810         struct  sta_priv *pstapriv = &adapter->stapriv;
 811         struct  mlme_priv *pmlmepriv = &adapter->mlmepriv;
 812         u8 *mybssid  = get_bssid(pmlmepriv);
 813         u8 *myhwaddr = myid(&adapter->eeprompriv);
 814         int bmcast = IS_MCAST(pattrib->dst);
 815
 816
 817         if ((check_fwstate(pmlmepriv, WIFI_STATION_STATE) == true) &&
 818             (check_fwstate(pmlmepriv, _FW_LINKED) == true ||
 819             check_fwstate(pmlmepriv, _FW_UNDER_LINKING))) {
 820                 /*  filter packets that SA is myself or multicast or broadcast */
 821                 if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN)) {
 822                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" SA==myself\n"));
 823                         ret = _FAIL;
 824                         goto exit;
 825                 }
 826
 827                 /*  da should be for me */
 828                 if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast)) {
 829                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
 830                                  (" ap2sta_data_frame:  compare DA fail; DA=%pM\n", (pattrib->dst)));
 831                         ret = _FAIL;
 832                         goto exit;
 833                 }
 834
 835                 /*  check BSSID */
 836                 if (!memcmp(pattrib->bssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
 837                     !memcmp(mybssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
 838                      (memcmp(pattrib->bssid, mybssid, ETH_ALEN))) {
 839                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
 840                                  (" ap2sta_data_frame:  compare BSSID fail ; BSSID=%pM\n", (pattrib->bssid)));
 841                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("mybssid=%pM\n", (mybssid)));
 842
 843                         if (!bmcast) {
 844                                 DBG_88E("issue_deauth to the nonassociated ap=%pM for the reason(7)\n", (pattrib->bssid));
 845                                 issue_deauth(adapter, pattrib->bssid, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
 846                         }
 847
 848                         ret = _FAIL;
 849                         goto exit;
 850                 }
 851
 852                 if (bmcast)
 853                         *psta = rtw_get_bcmc_stainfo(adapter);
 854                 else
 855                         *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /*  get ap_info */
 856
 857                 if (*psta == NULL) {
 858                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("ap2sta: can't get psta under STATION_MODE ; drop pkt\n"));
 859                         ret = _FAIL;
 860                         goto exit;
 861                 }
 862
 863                 /* if ((GetFrameSubType(ptr) & WIFI_QOS_DATA_TYPE) == WIFI_QOS_DATA_TYPE) { */
 864                 /*  */
 865
 866                 if (GetFrameSubType(ptr) & BIT(6)) {
 867                         /* No data, will not indicate to upper layer, temporily count it here */
 868                         count_rx_stats(adapter, precv_frame, *psta);
 869                         ret = RTW_RX_HANDLED;
 870                         goto exit;
 871                 }
 872         } else if ((check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) &&
 873                    (check_fwstate(pmlmepriv, _FW_LINKED) == true)) {
 874                 memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN);
 875                 memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN);
 876                 memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN);
 877                 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
 878                 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
 879
 880                 /*  */
 881                 memcpy(pattrib->bssid,  mybssid, ETH_ALEN);
 882
 883                 *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /*  get sta_info */
 884                 if (*psta == NULL) {
 885                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("can't get psta under MP_MODE ; drop pkt\n"));
 886                         ret = _FAIL;
 887                         goto exit;
 888                 }
 889         } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
 890                 /* Special case */
 891                 ret = RTW_RX_HANDLED;
 892                 goto exit;
 893         } else {
 894                 if (!memcmp(myhwaddr, pattrib->dst, ETH_ALEN) && (!bmcast)) {
 895                         *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /*  get sta_info */
 896                         if (*psta == NULL) {
 897                                 DBG_88E("issue_deauth to the ap =%pM for the reason(7)\n", (pattrib->bssid));
 898
 899                                 issue_deauth(adapter, pattrib->bssid, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
 900                         }
 901                 }
 902
 903                 ret = _FAIL;
 904         }
 905
 906 exit:
 907
 908
 909         return ret;
 910 }
 911
 912 static int sta2ap_data_frame(struct adapter *adapter,
 913                              struct recv_frame *precv_frame,
 914                              struct sta_info **psta)
 915 {
 916         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 917         struct  sta_priv *pstapriv = &adapter->stapriv;
 918         struct  mlme_priv *pmlmepriv = &adapter->mlmepriv;
 919         u8 *ptr = precv_frame->rx_data;
 920         unsigned char *mybssid  = get_bssid(pmlmepriv);
 921         int ret = _SUCCESS;
 922
 923
 924         if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) {
 925                 /* For AP mode, RA = BSSID, TX = STA(SRC_ADDR), A3 = DST_ADDR */
 926                 if (memcmp(pattrib->bssid, mybssid, ETH_ALEN)) {
 927                         ret = _FAIL;
 928                         goto exit;
 929                 }
 930
 931                 *psta = rtw_get_stainfo(pstapriv, pattrib->src);
 932                 if (*psta == NULL) {
 933                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("can't get psta under AP_MODE; drop pkt\n"));
 934                         DBG_88E("issue_deauth to sta=%pM for the reason(7)\n", (pattrib->src));
 935
 936                         issue_deauth(adapter, pattrib->src, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
 937
 938                         ret = RTW_RX_HANDLED;
 939                         goto exit;
 940                 }
 941
 942                 process_pwrbit_data(adapter, precv_frame);
 943
 944                 if ((GetFrameSubType(ptr) & WIFI_QOS_DATA_TYPE) == WIFI_QOS_DATA_TYPE) {
 945                         process_wmmps_data(adapter, precv_frame);
 946                 }
 947
 948                 if (GetFrameSubType(ptr) & BIT(6)) {
 949                         /* No data, will not indicate to upper layer, temporily count it here */
 950                         count_rx_stats(adapter, precv_frame, *psta);
 951                         ret = RTW_RX_HANDLED;
 952                         goto exit;
 953                 }
 954         } else {
 955                 u8 *myhwaddr = myid(&adapter->eeprompriv);
 956                 if (memcmp(pattrib->ra, myhwaddr, ETH_ALEN)) {
 957                         ret = RTW_RX_HANDLED;
 958                         goto exit;
 959                 }
 960                 DBG_88E("issue_deauth to sta=%pM for the reason(7)\n", (pattrib->src));
 961                 issue_deauth(adapter, pattrib->src, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
 962                 ret = RTW_RX_HANDLED;
 963                 goto exit;
 964         }
 965
 966 exit:
 967
 968
 969         return ret;
 970 }
 971
 972 static int validate_recv_ctrl_frame(struct adapter *padapter,
 973                                     struct recv_frame *precv_frame)
 974 {
 975 #ifdef CONFIG_88EU_AP_MODE
 976         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 977         struct sta_priv *pstapriv = &padapter->stapriv;
 978         u8 *pframe = precv_frame->rx_data;
 979
 980         if (GetFrameType(pframe) != WIFI_CTRL_TYPE)
 981                 return _FAIL;
 982
 983         /* receive the frames that ra(a1) is my address */
 984         if (memcmp(GetAddr1Ptr(pframe), myid(&padapter->eeprompriv), ETH_ALEN))
 985                 return _FAIL;
 986
 987         /* only handle ps-poll */
 988         if (GetFrameSubType(pframe) == WIFI_PSPOLL) {
 989                 u16 aid;
 990                 u8 wmmps_ac = 0;
 991                 struct sta_info *psta = NULL;
 992
 993                 aid = GetAid(pframe);
 994                 psta = rtw_get_stainfo(pstapriv, GetAddr2Ptr(pframe));
 995
 996                 if ((psta == NULL) || (psta->aid != aid))
 997                         return _FAIL;
 998
 999                 /* for rx pkt statistics */
1000                 psta->sta_stats.rx_ctrl_pkts++;
1001
1002                 switch (pattrib->priority) {
1003                 case 1:
1004                 case 2:
1005                         wmmps_ac = psta->uapsd_bk&BIT(0);
1006                         break;
1007                 case 4:
1008                 case 5:
1009                         wmmps_ac = psta->uapsd_vi&BIT(0);
1010                         break;
1011                 case 6:
1012                 case 7:
1013                         wmmps_ac = psta->uapsd_vo&BIT(0);
1014                         break;
1015                 case 0:
1016                 case 3:
1017                 default:
1018                         wmmps_ac = psta->uapsd_be&BIT(0);
1019                         break;
1020                 }
1021
1022                 if (wmmps_ac)
1023                         return _FAIL;
1024
1025                 if (psta->state & WIFI_STA_ALIVE_CHK_STATE) {
1026                         DBG_88E("%s alive check-rx ps-poll\n", __func__);
1027                         psta->expire_to = pstapriv->expire_to;
1028                         psta->state ^= WIFI_STA_ALIVE_CHK_STATE;
1029                 }
1030
1031                 if ((psta->state&WIFI_SLEEP_STATE) && (pstapriv->sta_dz_bitmap&BIT(psta->aid))) {
1032                         struct list_head *xmitframe_plist, *xmitframe_phead;
1033                         struct xmit_frame *pxmitframe = NULL;
1034
1035                         spin_lock_bh(&psta->sleep_q.lock);
1036
1037                         xmitframe_phead = get_list_head(&psta->sleep_q);
1038                         xmitframe_plist = xmitframe_phead->next;
1039
1040                         if (xmitframe_phead != xmitframe_plist) {
1041                                 pxmitframe = container_of(xmitframe_plist, struct xmit_frame, list);
1042
1043                                 xmitframe_plist = xmitframe_plist->next;
1044
1045                                 list_del_init(&pxmitframe->list);
1046
1047                                 psta->sleepq_len--;
1048
1049                                 if (psta->sleepq_len > 0)
1050                                         pxmitframe->attrib.mdata = 1;
1051                                 else
1052                                         pxmitframe->attrib.mdata = 0;
1053
1054                                 pxmitframe->attrib.triggered = 1;
1055
1056                                 spin_unlock_bh(&psta->sleep_q.lock);
1057                                 if (rtw_hal_xmit(padapter, pxmitframe) == true)
1058                                         rtw_os_xmit_complete(padapter, pxmitframe);
1059                                 spin_lock_bh(&psta->sleep_q.lock);
1060
1061                                 if (psta->sleepq_len == 0) {
1062                                         pstapriv->tim_bitmap &= ~BIT(psta->aid);
1063
1064                                         /* update BCN for TIM IE */
1065                                         /* update_BCNTIM(padapter); */
1066                                         update_beacon(padapter, _TIM_IE_, NULL, false);
1067                                 }
1068                         } else {
1069                                 if (pstapriv->tim_bitmap&BIT(psta->aid)) {
1070                                         if (psta->sleepq_len == 0) {
1071                                                 DBG_88E("no buffered packets to xmit\n");
1072
1073                                                 /* issue nulldata with More data bit = 0 to indicate we have no buffered packets */
1074                                                 issue_nulldata(padapter, psta->hwaddr, 0, 0, 0);
1075                                         } else {
1076                                                 DBG_88E("error!psta->sleepq_len=%d\n", psta->sleepq_len);
1077                                                 psta->sleepq_len = 0;
1078                                         }
1079
1080                                         pstapriv->tim_bitmap &= ~BIT(psta->aid);
1081
1082                                         /* update BCN for TIM IE */
1083                                         /* update_BCNTIM(padapter); */
1084                                         update_beacon(padapter, _TIM_IE_, NULL, false);
1085                                 }
1086                         }
1087
1088                         spin_unlock_bh(&psta->sleep_q.lock);
1089                 }
1090         }
1091
1092 #endif
1093
1094         return _FAIL;
1095 }
1096
1097 struct recv_frame *recvframe_chk_defrag(struct adapter *padapter,
1098                                         struct recv_frame *precv_frame);
1099
1100 static int validate_recv_mgnt_frame(struct adapter *padapter,
1101                                     struct recv_frame *precv_frame)
1102 {
1103         struct sta_info *psta;
1104
1105         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("+validate_recv_mgnt_frame\n"));
1106
1107         precv_frame = recvframe_chk_defrag(padapter, precv_frame);
1108         if (precv_frame == NULL) {
1109                 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("%s: fragment packet\n", __func__));
1110                 return _SUCCESS;
1111         }
1112
1113         /* for rx pkt statistics */
1114         psta = rtw_get_stainfo(&padapter->stapriv,
1115                                GetAddr2Ptr(precv_frame->rx_data));
1116         if (psta) {
1117                 psta->sta_stats.rx_mgnt_pkts++;
1118                 if (GetFrameSubType(precv_frame->rx_data) == WIFI_BEACON) {
1119                         psta->sta_stats.rx_beacon_pkts++;
1120                 } else if (GetFrameSubType(precv_frame->rx_data) == WIFI_PROBEREQ) {
1121                         psta->sta_stats.rx_probereq_pkts++;
1122                 } else if (GetFrameSubType(precv_frame->rx_data) == WIFI_PROBERSP) {
1123                         if (!memcmp(padapter->eeprompriv.mac_addr,
1124                                     GetAddr1Ptr(precv_frame->rx_data), ETH_ALEN))
1125                                 psta->sta_stats.rx_probersp_pkts++;
1126                         else if (is_broadcast_mac_addr(GetAddr1Ptr(precv_frame->rx_data)) ||
1127                                  is_multicast_mac_addr(GetAddr1Ptr(precv_frame->rx_data)))
1128                                 psta->sta_stats.rx_probersp_bm_pkts++;
1129                         else
1130                                 psta->sta_stats.rx_probersp_uo_pkts++;
1131                 }
1132         }
1133
1134         mgt_dispatcher(padapter, precv_frame);
1135
1136         return _SUCCESS;
1137 }
1138
1139 static int validate_recv_data_frame(struct adapter *adapter,
1140                                     struct recv_frame *precv_frame)
1141 {
1142         u8 bretry;
1143         u8 *psa, *pda, *pbssid;
1144         struct sta_info *psta = NULL;
1145         u8 *ptr = precv_frame->rx_data;
1146         struct rx_pkt_attrib    *pattrib = &precv_frame->attrib;
1147         struct security_priv    *psecuritypriv = &adapter->securitypriv;
1148         int ret = _SUCCESS;
1149
1150
1151         bretry = GetRetry(ptr);
1152         pda = get_da(ptr);
1153         psa = get_sa(ptr);
1154         pbssid = get_hdr_bssid(ptr);
1155
1156         if (pbssid == NULL) {
1157                 ret = _FAIL;
1158                 goto exit;
1159         }
1160
1161         memcpy(pattrib->dst, pda, ETH_ALEN);
1162         memcpy(pattrib->src, psa, ETH_ALEN);
1163
1164         memcpy(pattrib->bssid, pbssid, ETH_ALEN);
1165
1166         switch (pattrib->to_fr_ds) {
1167         case 0:
1168                 memcpy(pattrib->ra, pda, ETH_ALEN);
1169                 memcpy(pattrib->ta, psa, ETH_ALEN);
1170                 ret = sta2sta_data_frame(adapter, precv_frame, &psta);
1171                 break;
1172         case 1:
1173                 memcpy(pattrib->ra, pda, ETH_ALEN);
1174                 memcpy(pattrib->ta, pbssid, ETH_ALEN);
1175                 ret = ap2sta_data_frame(adapter, precv_frame, &psta);
1176                 break;
1177         case 2:
1178                 memcpy(pattrib->ra, pbssid, ETH_ALEN);
1179                 memcpy(pattrib->ta, psa, ETH_ALEN);
1180                 ret = sta2ap_data_frame(adapter, precv_frame, &psta);
1181                 break;
1182         case 3:
1183                 memcpy(pattrib->ra, GetAddr1Ptr(ptr), ETH_ALEN);
1184                 memcpy(pattrib->ta, GetAddr2Ptr(ptr), ETH_ALEN);
1185                 ret = _FAIL;
1186                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" case 3\n"));
1187                 break;
1188         default:
1189                 ret = _FAIL;
1190                 break;
1191         }
1192
1193         if (ret == _FAIL) {
1194                 goto exit;
1195         } else if (ret == RTW_RX_HANDLED) {
1196                 goto exit;
1197         }
1198
1199         if (psta == NULL) {
1200                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" after to_fr_ds_chk; psta==NULL\n"));
1201                 ret = _FAIL;
1202                 goto exit;
1203         }
1204
1205         /* psta->rssi = prxcmd->rssi; */
1206         /* psta->signal_quality = prxcmd->sq; */
1207         precv_frame->psta = psta;
1208
1209         pattrib->amsdu = 0;
1210         pattrib->ack_policy = 0;
1211         /* parsing QC field */
1212         if (pattrib->qos == 1) {
1213                 pattrib->priority = GetPriority((ptr + 24));
1214                 pattrib->ack_policy = GetAckpolicy((ptr + 24));
1215                 pattrib->amsdu = GetAMsdu((ptr + 24));
1216                 pattrib->hdrlen = pattrib->to_fr_ds == 3 ? 32 : 26;
1217
1218                 if (pattrib->priority != 0 && pattrib->priority != 3)
1219                         adapter->recvpriv.bIsAnyNonBEPkts = true;
1220         } else {
1221                 pattrib->priority = 0;
1222                 pattrib->hdrlen = pattrib->to_fr_ds == 3 ? 30 : 24;
1223         }
1224
1225         if (pattrib->order)/* HT-CTRL 11n */
1226                 pattrib->hdrlen += 4;
1227
1228         precv_frame->preorder_ctrl = &psta->recvreorder_ctrl[pattrib->priority];
1229
1230         /*  decache, drop duplicate recv packets */
1231         if (recv_decache(precv_frame, bretry, &psta->sta_recvpriv.rxcache) == _FAIL) {
1232                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("decache : drop pkt\n"));
1233                 ret = _FAIL;
1234                 goto exit;
1235         }
1236
1237         if (pattrib->privacy) {
1238                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("validate_recv_data_frame:pattrib->privacy=%x\n", pattrib->privacy));
1239                 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)));
1240
1241                 GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt, IS_MCAST(pattrib->ra));
1242
1243                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n pattrib->encrypt=%d\n", pattrib->encrypt));
1244
1245                 SET_ICE_IV_LEN(pattrib->iv_len, pattrib->icv_len, pattrib->encrypt);
1246         } else {
1247                 pattrib->encrypt = 0;
1248                 pattrib->iv_len = 0;
1249                 pattrib->icv_len = 0;
1250         }
1251
1252 exit:
1253
1254
1255         return ret;
1256 }
1257
1258 static int validate_recv_frame(struct adapter *adapter,
1259                                struct recv_frame *precv_frame)
1260 {
1261         /* shall check frame subtype, to / from ds, da, bssid */
1262
1263         /* then call check if rx seq/frag. duplicated. */
1264
1265         u8 type;
1266         u8 subtype;
1267         int retval = _SUCCESS;
1268         u8 bDumpRxPkt;
1269         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
1270         u8 *ptr = precv_frame->rx_data;
1271         u8  ver = (unsigned char)(*ptr)&0x3;
1272         struct mlme_ext_priv *pmlmeext = &adapter->mlmeextpriv;
1273
1274
1275         if (pmlmeext->sitesurvey_res.state == SCAN_PROCESS) {
1276                 int ch_set_idx = rtw_ch_set_search_ch(pmlmeext->channel_set, rtw_get_oper_ch(adapter));
1277                 if (ch_set_idx >= 0)
1278                         pmlmeext->channel_set[ch_set_idx].rx_count++;
1279         }
1280
1281         /* add version chk */
1282         if (ver != 0) {
1283                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_data_frame fail! (ver!=0)\n"));
1284                 retval = _FAIL;
1285                 goto exit;
1286         }
1287
1288         type =  GetFrameType(ptr);
1289         subtype = GetFrameSubType(ptr); /* bit(7)~bit(2) */
1290
1291         pattrib->to_fr_ds = get_tofr_ds(ptr);
1292
1293         pattrib->frag_num = GetFragNum(ptr);
1294         pattrib->seq_num = GetSequence(ptr);
1295
1296         pattrib->pw_save = GetPwrMgt(ptr);
1297         pattrib->mfrag = GetMFrag(ptr);
1298         pattrib->mdata = GetMData(ptr);
1299         pattrib->privacy = GetPrivacy(ptr);
1300         pattrib->order = GetOrder(ptr);
1301
1302         /* Dump rx packets */
1303         rtw_hal_get_def_var(adapter, HAL_DEF_DBG_DUMP_RXPKT, &(bDumpRxPkt));
1304         if (bDumpRxPkt == 1) {/* dump all rx packets */
1305                 int i;
1306                 DBG_88E("#############################\n");
1307
1308                 for (i = 0; i < 64; i = i+8)
1309                         DBG_88E("%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:\n", *(ptr+i),
1310                                 *(ptr+i+1), *(ptr+i+2), *(ptr+i+3), *(ptr+i+4), *(ptr+i+5), *(ptr+i+6), *(ptr+i+7));
1311                 DBG_88E("#############################\n");
1312         } else if (bDumpRxPkt == 2) {
1313                 if (type == WIFI_MGT_TYPE) {
1314                         int i;
1315                         DBG_88E("#############################\n");
1316
1317                         for (i = 0; i < 64; i = i+8)
1318                                 DBG_88E("%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:\n", *(ptr+i),
1319                                         *(ptr+i+1), *(ptr+i+2), *(ptr+i+3), *(ptr+i+4), *(ptr+i+5), *(ptr+i+6), *(ptr+i+7));
1320                         DBG_88E("#############################\n");
1321                 }
1322         } else if (bDumpRxPkt == 3) {
1323                 if (type == WIFI_DATA_TYPE) {
1324                         int i;
1325                         DBG_88E("#############################\n");
1326
1327                         for (i = 0; i < 64; i = i+8)
1328                                 DBG_88E("%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:\n", *(ptr+i),
1329                                         *(ptr+i+1), *(ptr+i+2), *(ptr+i+3), *(ptr+i+4), *(ptr+i+5), *(ptr+i+6), *(ptr+i+7));
1330                         DBG_88E("#############################\n");
1331                 }
1332         }
1333         switch (type) {
1334         case WIFI_MGT_TYPE: /* mgnt */
1335                 retval = validate_recv_mgnt_frame(adapter, precv_frame);
1336                 if (retval == _FAIL)
1337                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_mgnt_frame fail\n"));
1338                 retval = _FAIL; /*  only data frame return _SUCCESS */
1339                 break;
1340         case WIFI_CTRL_TYPE: /* ctrl */
1341                 retval = validate_recv_ctrl_frame(adapter, precv_frame);
1342                 if (retval == _FAIL)
1343                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_ctrl_frame fail\n"));
1344                 retval = _FAIL; /*  only data frame return _SUCCESS */
1345                 break;
1346         case WIFI_DATA_TYPE: /* data */
1347                 rtw_led_control(adapter, LED_CTL_RX);
1348                 pattrib->qos = (subtype & BIT(7)) ? 1 : 0;
1349                 retval = validate_recv_data_frame(adapter, precv_frame);
1350                 if (retval == _FAIL) {
1351                         struct recv_priv *precvpriv = &adapter->recvpriv;
1352                         precvpriv->rx_drop++;
1353                 }
1354                 break;
1355         default:
1356                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_data_frame fail! type= 0x%x\n", type));
1357                 retval = _FAIL;
1358                 break;
1359         }
1360
1361 exit:
1362
1363
1364         return retval;
1365 }
1366
1367 /* remove the wlanhdr and add the eth_hdr */
1368
1369 static int wlanhdr_to_ethhdr(struct recv_frame *precvframe)
1370 {
1371         int     rmv_len;
1372         u16     eth_type, len;
1373         __be16 be_tmp;
1374         u8      bsnaphdr;
1375         u8      *psnap_type;
1376         struct ieee80211_snap_hdr       *psnap;
1377
1378         struct adapter          *adapter = precvframe->adapter;
1379         struct mlme_priv        *pmlmepriv = &adapter->mlmepriv;
1380         u8 *ptr = precvframe->rx_data;
1381         struct rx_pkt_attrib *pattrib = &precvframe->attrib;
1382
1383         if (pattrib->encrypt)
1384                 recvframe_pull_tail(precvframe, pattrib->icv_len);
1385
1386         psnap = (struct ieee80211_snap_hdr *)(ptr+pattrib->hdrlen + pattrib->iv_len);
1387         psnap_type = ptr+pattrib->hdrlen + pattrib->iv_len+SNAP_SIZE;
1388         /* convert hdr + possible LLC headers into Ethernet header */
1389         if ((!memcmp(psnap, rtw_rfc1042_header, SNAP_SIZE) &&
1390              (!memcmp(psnap_type, SNAP_ETH_TYPE_IPX, 2) == false) &&
1391              (!memcmp(psnap_type, SNAP_ETH_TYPE_APPLETALK_AARP, 2) == false)) ||
1392              !memcmp(psnap, rtw_bridge_tunnel_header, SNAP_SIZE)) {
1393                 /* remove RFC1042 or Bridge-Tunnel encapsulation and replace EtherType */
1394                 bsnaphdr = true;
1395         } else {
1396                 /* Leave Ethernet header part of hdr and full payload */
1397                 bsnaphdr = false;
1398         }
1399
1400         rmv_len = pattrib->hdrlen + pattrib->iv_len + (bsnaphdr ? SNAP_SIZE : 0);
1401         len = precvframe->len - rmv_len;
1402
1403         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
1404                  ("\n===pattrib->hdrlen: %x,  pattrib->iv_len:%x===\n\n", pattrib->hdrlen,  pattrib->iv_len));
1405
1406         memcpy(&be_tmp, ptr+rmv_len, 2);
1407         eth_type = ntohs(be_tmp); /* pattrib->ether_type */
1408         pattrib->eth_type = eth_type;
1409
1410         if ((check_fwstate(pmlmepriv, WIFI_MP_STATE))) {
1411                 ptr += rmv_len;
1412                 *ptr = 0x87;
1413                 *(ptr+1) = 0x12;
1414
1415                 eth_type = 0x8712;
1416                 /*  append rx status for mp test packets */
1417                 ptr = recvframe_pull(precvframe, (rmv_len-sizeof(struct ethhdr)+2)-24);
1418                 memcpy(ptr, get_rxmem(precvframe), 24);
1419                 ptr += 24;
1420         } else {
1421                 ptr = recvframe_pull(precvframe, (rmv_len-sizeof(struct ethhdr) + (bsnaphdr ? 2 : 0)));
1422         }
1423
1424         memcpy(ptr, pattrib->dst, ETH_ALEN);
1425         memcpy(ptr+ETH_ALEN, pattrib->src, ETH_ALEN);
1426
1427         if (!bsnaphdr) {
1428                 be_tmp = htons(len);
1429                 memcpy(ptr+12, &be_tmp, 2);
1430         }
1431
1432         return _SUCCESS;
1433 }
1434
1435 /* perform defrag */
1436 static struct recv_frame *recvframe_defrag(struct adapter *adapter,
1437                                            struct __queue *defrag_q)
1438 {
1439         struct list_head *plist, *phead;
1440         u8 wlanhdr_offset;
1441         u8      curfragnum;
1442         struct recv_frame *pfhdr, *pnfhdr;
1443         struct recv_frame *prframe, *pnextrframe;
1444         struct __queue *pfree_recv_queue;
1445
1446
1447         curfragnum = 0;
1448         pfree_recv_queue = &adapter->recvpriv.free_recv_queue;
1449
1450         phead = get_list_head(defrag_q);
1451         plist = phead->next;
1452         pfhdr = container_of(plist, struct recv_frame, list);
1453         prframe = (struct recv_frame *)pfhdr;
1454         list_del_init(&(prframe->list));
1455
1456         if (curfragnum != pfhdr->attrib.frag_num) {
1457                 /* the first fragment number must be 0 */
1458                 /* free the whole queue */
1459                 rtw_free_recvframe(prframe, pfree_recv_queue);
1460                 rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
1461
1462                 return NULL;
1463         }
1464
1465         curfragnum++;
1466
1467         plist = get_list_head(defrag_q);
1468
1469         plist = plist->next;
1470
1471         while (phead != plist) {
1472                 pnfhdr = container_of(plist, struct recv_frame, list);
1473                 pnextrframe = (struct recv_frame *)pnfhdr;
1474
1475                 /* check the fragment sequence  (2nd ~n fragment frame) */
1476
1477                 if (curfragnum != pnfhdr->attrib.frag_num) {
1478                         /* the fragment number must be increasing  (after decache) */
1479                         /* release the defrag_q & prframe */
1480                         rtw_free_recvframe(prframe, pfree_recv_queue);
1481                         rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
1482                         return NULL;
1483                 }
1484
1485                 curfragnum++;
1486
1487                 /* copy the 2nd~n fragment frame's payload to the first fragment */
1488                 /* get the 2nd~last fragment frame's payload */
1489
1490                 wlanhdr_offset = pnfhdr->attrib.hdrlen + pnfhdr->attrib.iv_len;
1491
1492                 recvframe_pull(pnextrframe, wlanhdr_offset);
1493
1494                 /* append  to first fragment frame's tail (if privacy frame, pull the ICV) */
1495                 recvframe_pull_tail(prframe, pfhdr->attrib.icv_len);
1496
1497                 /* memcpy */
1498                 memcpy(pfhdr->rx_tail, pnfhdr->rx_data, pnfhdr->len);
1499
1500                 recvframe_put(prframe, pnfhdr->len);
1501
1502                 pfhdr->attrib.icv_len = pnfhdr->attrib.icv_len;
1503                 plist = plist->next;
1504         }
1505
1506         /* free the defrag_q queue and return the prframe */
1507         rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
1508
1509         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("Performance defrag!!!!!\n"));
1510
1511
1512         return prframe;
1513 }
1514
1515 /* check if need to defrag, if needed queue the frame to defrag_q */
1516 struct recv_frame *recvframe_chk_defrag(struct adapter *padapter,
1517                                         struct recv_frame *precv_frame)
1518 {
1519         u8      ismfrag;
1520         u8      fragnum;
1521         u8      *psta_addr;
1522         struct recv_frame *pfhdr;
1523         struct sta_info *psta;
1524         struct sta_priv *pstapriv;
1525         struct list_head *phead;
1526         struct recv_frame *prtnframe = NULL;
1527         struct __queue *pfree_recv_queue, *pdefrag_q;
1528
1529
1530         pstapriv = &padapter->stapriv;
1531
1532         pfhdr = precv_frame;
1533
1534         pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
1535
1536         /* need to define struct of wlan header frame ctrl */
1537         ismfrag = pfhdr->attrib.mfrag;
1538         fragnum = pfhdr->attrib.frag_num;
1539
1540         psta_addr = pfhdr->attrib.ta;
1541         psta = rtw_get_stainfo(pstapriv, psta_addr);
1542         if (psta == NULL) {
1543                 u8 type = GetFrameType(pfhdr->rx_data);
1544                 if (type != WIFI_DATA_TYPE) {
1545                         psta = rtw_get_bcmc_stainfo(padapter);
1546                         pdefrag_q = &psta->sta_recvpriv.defrag_q;
1547                 } else {
1548                         pdefrag_q = NULL;
1549                 }
1550         } else {
1551                 pdefrag_q = &psta->sta_recvpriv.defrag_q;
1552         }
1553
1554         if ((ismfrag == 0) && (fragnum == 0))
1555                 prtnframe = precv_frame;/* isn't a fragment frame */
1556
1557         if (ismfrag == 1) {
1558                 /* 0~(n-1) fragment frame */
1559                 /* enqueue to defraf_g */
1560                 if (pdefrag_q != NULL) {
1561                         if (fragnum == 0) {
1562                                 /* the first fragment */
1563                                 if (!list_empty(&pdefrag_q->queue)) {
1564                                         /* free current defrag_q */
1565                                         rtw_free_recvframe_queue(pdefrag_q, pfree_recv_queue);
1566                                 }
1567                         }
1568
1569                         /* Then enqueue the 0~(n-1) fragment into the defrag_q */
1570
1571                         phead = get_list_head(pdefrag_q);
1572                         list_add_tail(&pfhdr->list, phead);
1573
1574                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("Enqueuq: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1575
1576                         prtnframe = NULL;
1577                 } else {
1578                         /* can't find this ta's defrag_queue, so free this recv_frame */
1579                         rtw_free_recvframe(precv_frame, pfree_recv_queue);
1580                         prtnframe = NULL;
1581                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("Free because pdefrag_q==NULL: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1582                 }
1583         }
1584
1585         if ((ismfrag == 0) && (fragnum != 0)) {
1586                 /* the last fragment frame */
1587                 /* enqueue the last fragment */
1588                 if (pdefrag_q != NULL) {
1589                         phead = get_list_head(pdefrag_q);
1590                         list_add_tail(&pfhdr->list, phead);
1591
1592                         /* call recvframe_defrag to defrag */
1593                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("defrag: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1594                         precv_frame = recvframe_defrag(padapter, pdefrag_q);
1595                         prtnframe = precv_frame;
1596                 } else {
1597                         /* can't find this ta's defrag_queue, so free this recv_frame */
1598                         rtw_free_recvframe(precv_frame, pfree_recv_queue);
1599                         prtnframe = NULL;
1600                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("Free because pdefrag_q==NULL: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1601                 }
1602         }
1603
1604         if ((prtnframe != NULL) && (prtnframe->attrib.privacy)) {
1605                 /* after defrag we must check tkip mic code */
1606                 if (recvframe_chkmic(padapter,  prtnframe) == _FAIL) {
1607                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recvframe_chkmic(padapter,  prtnframe)==_FAIL\n"));
1608                         rtw_free_recvframe(prtnframe, pfree_recv_queue);
1609                         prtnframe = NULL;
1610                 }
1611         }
1612
1613
1614         return prtnframe;
1615 }
1616
1617 static int amsdu_to_msdu(struct adapter *padapter, struct recv_frame *prframe)
1618 {
1619         int     a_len, padding_len;
1620         u16     eth_type, nSubframe_Length;
1621         u8      nr_subframes, i;
1622         unsigned char *pdata;
1623         struct rx_pkt_attrib *pattrib;
1624         unsigned char *data_ptr;
1625         struct sk_buff *sub_skb, *subframes[MAX_SUBFRAME_COUNT];
1626         struct recv_priv *precvpriv = &padapter->recvpriv;
1627         struct __queue *pfree_recv_queue = &(precvpriv->free_recv_queue);
1628         nr_subframes = 0;
1629
1630         pattrib = &prframe->attrib;
1631
1632         recvframe_pull(prframe, prframe->attrib.hdrlen);
1633
1634         if (prframe->attrib.iv_len > 0)
1635                 recvframe_pull(prframe, prframe->attrib.iv_len);
1636
1637         a_len = prframe->len;
1638
1639         pdata = prframe->rx_data;
1640
1641         while (a_len > ETH_HLEN) {
1642                 /* Offset 12 denote 2 mac address */
1643                 nSubframe_Length = get_unaligned_be16(pdata + 12);
1644
1645                 if (a_len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
1646                         DBG_88E("nRemain_Length is %d and nSubframe_Length is : %d\n", a_len, nSubframe_Length);
1647                         goto exit;
1648                 }
1649
1650                 /* move the data point to data content */
1651                 pdata += ETH_HLEN;
1652                 a_len -= ETH_HLEN;
1653
1654                 /* Allocate new skb for releasing to upper layer */
1655                 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
1656                 if (sub_skb) {
1657                         skb_reserve(sub_skb, 12);
1658                         data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
1659                         memcpy(data_ptr, pdata, nSubframe_Length);
1660                 } else {
1661                         sub_skb = skb_clone(prframe->pkt, GFP_ATOMIC);
1662                         if (sub_skb) {
1663                                 sub_skb->data = pdata;
1664                                 sub_skb->len = nSubframe_Length;
1665                                 skb_set_tail_pointer(sub_skb, nSubframe_Length);
1666                         } else {
1667                                 DBG_88E("skb_clone() Fail!!! , nr_subframes=%d\n", nr_subframes);
1668                                 break;
1669                         }
1670                 }
1671
1672                 subframes[nr_subframes++] = sub_skb;
1673
1674                 if (nr_subframes >= MAX_SUBFRAME_COUNT) {
1675                         DBG_88E("ParseSubframe(): Too many Subframes! Packets dropped!\n");
1676                         break;
1677                 }
1678
1679                 pdata += nSubframe_Length;
1680                 a_len -= nSubframe_Length;
1681                 if (a_len != 0) {
1682                         padding_len = 4 - ((nSubframe_Length + ETH_HLEN) & (4-1));
1683                         if (padding_len == 4) {
1684                                 padding_len = 0;
1685                         }
1686
1687                         if (a_len < padding_len) {
1688                                 goto exit;
1689                         }
1690                         pdata += padding_len;
1691                         a_len -= padding_len;
1692                 }
1693         }
1694
1695         for (i = 0; i < nr_subframes; i++) {
1696                 sub_skb = subframes[i];
1697                 /* convert hdr + possible LLC headers into Ethernet header */
1698                 eth_type = get_unaligned_be16(&sub_skb->data[6]);
1699                 if (sub_skb->len >= 8 &&
1700                     ((!memcmp(sub_skb->data, rtw_rfc1042_header, SNAP_SIZE) &&
1701                           eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) ||
1702                          !memcmp(sub_skb->data, rtw_bridge_tunnel_header, SNAP_SIZE))) {
1703                         /* remove RFC1042 or Bridge-Tunnel encapsulation and replace EtherType */
1704                         skb_pull(sub_skb, SNAP_SIZE);
1705                         memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
1706                         memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
1707                 } else {
1708                         __be16 len;
1709                         /* Leave Ethernet header part of hdr and full payload */
1710                         len = htons(sub_skb->len);
1711                         memcpy(skb_push(sub_skb, 2), &len, 2);
1712                         memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
1713                         memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
1714                 }
1715
1716                 /* Indicate the packets to upper layer */
1717                 /*  Insert NAT2.5 RX here! */
1718                 sub_skb->protocol = eth_type_trans(sub_skb, padapter->pnetdev);
1719                 sub_skb->dev = padapter->pnetdev;
1720
1721                 sub_skb->ip_summed = CHECKSUM_NONE;
1722
1723                 netif_rx(sub_skb);
1724         }
1725
1726 exit:
1727
1728         prframe->len = 0;
1729         rtw_free_recvframe(prframe, pfree_recv_queue);/* free this recv_frame */
1730
1731         return _SUCCESS;
1732 }
1733
1734 static int check_indicate_seq(struct recv_reorder_ctrl *preorder_ctrl, u16 seq_num)
1735 {
1736         u8      wsize = preorder_ctrl->wsize_b;
1737         u16     wend = (preorder_ctrl->indicate_seq + wsize - 1) & 0xFFF;/*  4096; */
1738
1739         /*  Rx Reorder initialize condition. */
1740         if (preorder_ctrl->indicate_seq == 0xFFFF)
1741                 preorder_ctrl->indicate_seq = seq_num;
1742
1743         /*  Drop out the packet which SeqNum is smaller than WinStart */
1744         if (SN_LESS(seq_num, preorder_ctrl->indicate_seq))
1745                 return false;
1746
1747         /*  */
1748         /*  Sliding window manipulation. Conditions includes: */
1749         /*  1. Incoming SeqNum is equal to WinStart =>Window shift 1 */
1750         /*  2. Incoming SeqNum is larger than the WinEnd => Window shift N */
1751         /*  */
1752         if (SN_EQUAL(seq_num, preorder_ctrl->indicate_seq)) {
1753                 preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1) & 0xFFF;
1754         } else if (SN_LESS(wend, seq_num)) {
1755                 if (seq_num >= (wsize - 1))
1756                         preorder_ctrl->indicate_seq = seq_num + 1 - wsize;
1757                 else
1758                         preorder_ctrl->indicate_seq = 0xFFF - (wsize - (seq_num + 1)) + 1;
1759         }
1760
1761         return true;
1762 }
1763
1764 static int enqueue_reorder_recvframe(struct recv_reorder_ctrl *preorder_ctrl,
1765                                      struct recv_frame *prframe)
1766 {
1767         struct rx_pkt_attrib *pattrib = &prframe->attrib;
1768         struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1769         struct list_head *phead, *plist;
1770         struct recv_frame *hdr;
1771         struct rx_pkt_attrib *pnextattrib;
1772
1773         phead = get_list_head(ppending_recvframe_queue);
1774         plist = phead->next;
1775
1776         while (phead != plist) {
1777                 hdr = container_of(plist, struct recv_frame, list);
1778                 pnextattrib = &hdr->attrib;
1779
1780                 if (SN_LESS(pnextattrib->seq_num, pattrib->seq_num))
1781                         plist = plist->next;
1782                 else if (SN_EQUAL(pnextattrib->seq_num, pattrib->seq_num))
1783                         return false;
1784                 else
1785                         break;
1786         }
1787
1788         list_del_init(&(prframe->list));
1789
1790         list_add_tail(&(prframe->list), plist);
1791         return true;
1792 }
1793
1794 static int recv_indicatepkts_in_order(struct adapter *padapter, struct recv_reorder_ctrl *preorder_ctrl, int bforced)
1795 {
1796         struct list_head *phead, *plist;
1797         struct recv_frame *prframe;
1798         struct recv_frame *prhdr;
1799         struct rx_pkt_attrib *pattrib;
1800         int bPktInBuf = false;
1801         struct recv_priv *precvpriv = &padapter->recvpriv;
1802         struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1803
1804         phead =         get_list_head(ppending_recvframe_queue);
1805         plist = phead->next;
1806
1807         /*  Handling some condition for forced indicate case. */
1808         if (bforced) {
1809                 if (list_empty(phead))
1810                         return true;
1811
1812                 prhdr = container_of(plist, struct recv_frame, list);
1813                 pattrib = &prhdr->attrib;
1814                 preorder_ctrl->indicate_seq = pattrib->seq_num;
1815         }
1816
1817         /*  Prepare indication list and indication. */
1818         /*  Check if there is any packet need indicate. */
1819         while (!list_empty(phead)) {
1820                 prhdr = container_of(plist, struct recv_frame, list);
1821                 prframe = (struct recv_frame *)prhdr;
1822                 pattrib = &prframe->attrib;
1823
1824                 if (!SN_LESS(preorder_ctrl->indicate_seq, pattrib->seq_num)) {
1825                         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_,
1826                                  ("recv_indicatepkts_in_order: indicate=%d seq=%d amsdu=%d\n",
1827                                   preorder_ctrl->indicate_seq, pattrib->seq_num, pattrib->amsdu));
1828                         plist = plist->next;
1829                         list_del_init(&(prframe->list));
1830
1831                         if (SN_EQUAL(preorder_ctrl->indicate_seq, pattrib->seq_num))
1832                                 preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1) & 0xFFF;
1833
1834                         /* Set this as a lock to make sure that only one thread is indicating packet. */
1835
1836                         /* indicate this recv_frame */
1837                         if (!pattrib->amsdu) {
1838                                 if ((!padapter->bDriverStopped) &&
1839                                     (!padapter->bSurpriseRemoved))
1840                                         rtw_recv_indicatepkt(padapter, prframe);/* indicate this recv_frame */
1841                         } else if (pattrib->amsdu == 1) {
1842                                 if (amsdu_to_msdu(padapter, prframe) != _SUCCESS)
1843                                         rtw_free_recvframe(prframe, &precvpriv->free_recv_queue);
1844                         } else {
1845                                 /* error condition; */
1846                         }
1847
1848                         /* Update local variables. */
1849                         bPktInBuf = false;
1850                 } else {
1851                         bPktInBuf = true;
1852                         break;
1853                 }
1854         }
1855         return bPktInBuf;
1856 }
1857
1858 static int recv_indicatepkt_reorder(struct adapter *padapter,
1859                                     struct recv_frame *prframe)
1860 {
1861         int retval = _SUCCESS;
1862         struct rx_pkt_attrib *pattrib = &prframe->attrib;
1863         struct recv_reorder_ctrl *preorder_ctrl = prframe->preorder_ctrl;
1864         struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1865
1866         if (!pattrib->amsdu) {
1867                 /* s1. */
1868                 wlanhdr_to_ethhdr(prframe);
1869
1870                 if ((pattrib->qos != 1) || (pattrib->eth_type == 0x0806) ||
1871                     (pattrib->ack_policy != 0)) {
1872                         if ((!padapter->bDriverStopped) &&
1873                             (!padapter->bSurpriseRemoved)) {
1874                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("@@@@  recv_indicatepkt_reorder -recv_func recv_indicatepkt\n"));
1875
1876                                 rtw_recv_indicatepkt(padapter, prframe);
1877                                 return _SUCCESS;
1878                         }
1879
1880                         return _FAIL;
1881                 }
1882
1883                 if (!preorder_ctrl->enable) {
1884                         /* indicate this recv_frame */
1885                         preorder_ctrl->indicate_seq = pattrib->seq_num;
1886                         rtw_recv_indicatepkt(padapter, prframe);
1887
1888                         preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1)%4096;
1889                         return _SUCCESS;
1890                 }
1891         } else if (pattrib->amsdu == 1) { /* temp filter -> means didn't support A-MSDUs in a A-MPDU */
1892                 if (!preorder_ctrl->enable) {
1893                         preorder_ctrl->indicate_seq = pattrib->seq_num;
1894                         retval = amsdu_to_msdu(padapter, prframe);
1895
1896                         preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1)%4096;
1897                         return retval;
1898                 }
1899         }
1900
1901         spin_lock_bh(&ppending_recvframe_queue->lock);
1902
1903         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_,
1904                  ("recv_indicatepkt_reorder: indicate=%d seq=%d\n",
1905                   preorder_ctrl->indicate_seq, pattrib->seq_num));
1906
1907         /* s2. check if winstart_b(indicate_seq) needs to been updated */
1908         if (!check_indicate_seq(preorder_ctrl, pattrib->seq_num)) {
1909                 rtw_recv_indicatepkt(padapter, prframe);
1910
1911                 spin_unlock_bh(&ppending_recvframe_queue->lock);
1912
1913                 goto _success_exit;
1914         }
1915
1916         /* s3. Insert all packet into Reorder Queue to maintain its ordering. */
1917         if (!enqueue_reorder_recvframe(preorder_ctrl, prframe))
1918                 goto _err_exit;
1919
1920         /* s4. */
1921         /*  Indication process. */
1922         /*  After Packet dropping and Sliding Window shifting as above, we can now just indicate the packets */
1923         /*  with the SeqNum smaller than latest WinStart and buffer other packets. */
1924         /*  */
1925         /*  For Rx Reorder condition: */
1926         /*  1. All packets with SeqNum smaller than WinStart => Indicate */
1927         /*  2. All packets with SeqNum larger than or equal to WinStart => Buffer it. */
1928         /*  */
1929
1930         /* recv_indicatepkts_in_order(padapter, preorder_ctrl, true); */
1931         if (recv_indicatepkts_in_order(padapter, preorder_ctrl, false)) {
1932                 mod_timer(&preorder_ctrl->reordering_ctrl_timer,
1933                           jiffies + msecs_to_jiffies(REORDER_WAIT_TIME));
1934                 spin_unlock_bh(&ppending_recvframe_queue->lock);
1935         } else {
1936                 spin_unlock_bh(&ppending_recvframe_queue->lock);
1937                 del_timer_sync(&preorder_ctrl->reordering_ctrl_timer);
1938         }
1939
1940 _success_exit:
1941
1942         return _SUCCESS;
1943
1944 _err_exit:
1945
1946         spin_unlock_bh(&ppending_recvframe_queue->lock);
1947
1948         return _FAIL;
1949 }
1950
1951 void rtw_reordering_ctrl_timeout_handler(unsigned long data)
1952 {
1953         struct recv_reorder_ctrl *preorder_ctrl = (struct recv_reorder_ctrl *)data;
1954         struct adapter *padapter = preorder_ctrl->padapter;
1955         struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1956
1957         if (padapter->bDriverStopped || padapter->bSurpriseRemoved)
1958                 return;
1959
1960         spin_lock_bh(&ppending_recvframe_queue->lock);
1961
1962         if (recv_indicatepkts_in_order(padapter, preorder_ctrl, true) == true)
1963                 mod_timer(&preorder_ctrl->reordering_ctrl_timer,
1964                           jiffies + msecs_to_jiffies(REORDER_WAIT_TIME));
1965
1966         spin_unlock_bh(&ppending_recvframe_queue->lock);
1967 }
1968
1969 static int process_recv_indicatepkts(struct adapter *padapter,
1970                                      struct recv_frame *prframe)
1971 {
1972         int retval = _SUCCESS;
1973         struct mlme_priv        *pmlmepriv = &padapter->mlmepriv;
1974         struct ht_priv  *phtpriv = &pmlmepriv->htpriv;
1975
1976         if (phtpriv->ht_option) {  /* B/G/N Mode */
1977                 if (recv_indicatepkt_reorder(padapter, prframe) != _SUCCESS) {
1978                         /*  including perform A-MPDU Rx Ordering Buffer Control */
1979                         if ((!padapter->bDriverStopped) &&
1980                             (!padapter->bSurpriseRemoved)) {
1981                                 retval = _FAIL;
1982                                 return retval;
1983                         }
1984                 }
1985         } else { /* B/G mode */
1986                 retval = wlanhdr_to_ethhdr(prframe);
1987                 if (retval != _SUCCESS) {
1988                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("wlanhdr_to_ethhdr: drop pkt\n"));
1989                         return retval;
1990                 }
1991
1992                 if ((!padapter->bDriverStopped) &&
1993                     (!padapter->bSurpriseRemoved)) {
1994                         /* indicate this recv_frame */
1995                         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("@@@@ process_recv_indicatepkts- recv_func recv_indicatepkt\n"));
1996                         rtw_recv_indicatepkt(padapter, prframe);
1997                 } else {
1998                         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("@@@@ process_recv_indicatepkts- recv_func free_indicatepkt\n"));
1999
2000                         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("recv_func:bDriverStopped(%d) OR bSurpriseRemoved(%d)", padapter->bDriverStopped, padapter->bSurpriseRemoved));
2001                         retval = _FAIL;
2002                         return retval;
2003                 }
2004         }
2005
2006         return retval;
2007 }
2008
2009 static int recv_func_prehandle(struct adapter *padapter,
2010                                struct recv_frame *rframe)
2011 {
2012         int ret = _SUCCESS;
2013         struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
2014
2015         /* check the frame crtl field and decache */
2016         ret = validate_recv_frame(padapter, rframe);
2017         if (ret != _SUCCESS) {
2018                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("recv_func: validate_recv_frame fail! drop pkt\n"));
2019                 rtw_free_recvframe(rframe, pfree_recv_queue);/* free this recv_frame */
2020                 goto exit;
2021         }
2022
2023 exit:
2024         return ret;
2025 }
2026
2027 static int recv_func_posthandle(struct adapter *padapter,
2028                                 struct recv_frame *prframe)
2029 {
2030         int ret = _SUCCESS;
2031         struct recv_frame *orig_prframe = prframe;
2032         struct recv_priv *precvpriv = &padapter->recvpriv;
2033         struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
2034
2035         /*  DATA FRAME */
2036         rtw_led_control(padapter, LED_CTL_RX);
2037
2038         prframe = decryptor(padapter, prframe);
2039         if (prframe == NULL) {
2040                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("decryptor: drop pkt\n"));
2041                 ret = _FAIL;
2042                 goto _recv_data_drop;
2043         }
2044
2045         prframe = recvframe_chk_defrag(padapter, prframe);
2046         if (prframe == NULL) {
2047                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recvframe_chk_defrag: drop pkt\n"));
2048                 goto _recv_data_drop;
2049         }
2050
2051         prframe = portctrl(padapter, prframe);
2052         if (prframe == NULL) {
2053                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("portctrl: drop pkt\n"));
2054                 ret = _FAIL;
2055                 goto _recv_data_drop;
2056         }
2057
2058         count_rx_stats(padapter, prframe, NULL);
2059
2060         ret = process_recv_indicatepkts(padapter, prframe);
2061         if (ret != _SUCCESS) {
2062                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recv_func: process_recv_indicatepkts fail!\n"));
2063                 rtw_free_recvframe(orig_prframe, pfree_recv_queue);/* free this recv_frame */
2064                 goto _recv_data_drop;
2065         }
2066         return ret;
2067
2068 _recv_data_drop:
2069         precvpriv->rx_drop++;
2070         return ret;
2071 }
2072
2073 static int recv_func(struct adapter *padapter, struct recv_frame *rframe)
2074 {
2075         int ret;
2076         struct rx_pkt_attrib *prxattrib = &rframe->attrib;
2077         struct security_priv *psecuritypriv = &padapter->securitypriv;
2078         struct mlme_priv *mlmepriv = &padapter->mlmepriv;
2079
2080         /* check if need to handle uc_swdec_pending_queue*/
2081         if (check_fwstate(mlmepriv, WIFI_STATION_STATE) && psecuritypriv->busetkipkey) {
2082                 struct recv_frame *pending_frame;
2083
2084                 while ((pending_frame = rtw_alloc_recvframe(&padapter->recvpriv.uc_swdec_pending_queue))) {
2085                         if (recv_func_posthandle(padapter, pending_frame) == _SUCCESS)
2086                                 DBG_88E("%s: dequeue uc_swdec_pending_queue\n", __func__);
2087                 }
2088         }
2089
2090         ret = recv_func_prehandle(padapter, rframe);
2091
2092         if (ret == _SUCCESS) {
2093                 /* check if need to enqueue into uc_swdec_pending_queue*/
2094                 if (check_fwstate(mlmepriv, WIFI_STATION_STATE) &&
2095                     !IS_MCAST(prxattrib->ra) && prxattrib->encrypt > 0 &&
2096                     (prxattrib->bdecrypted == 0 || psecuritypriv->sw_decrypt) &&
2097                     !is_wep_enc(psecuritypriv->dot11PrivacyAlgrthm) &&
2098                     !psecuritypriv->busetkipkey) {
2099                         rtw_enqueue_recvframe(rframe, &padapter->recvpriv.uc_swdec_pending_queue);
2100                         DBG_88E("%s: no key, enqueue uc_swdec_pending_queue\n", __func__);
2101                         goto exit;
2102                 }
2103
2104                 ret = recv_func_posthandle(padapter, rframe);
2105         }
2106
2107 exit:
2108         return ret;
2109 }
2110
2111 s32 rtw_recv_entry(struct recv_frame *precvframe)
2112 {
2113         struct adapter *padapter;
2114         struct recv_priv *precvpriv;
2115         s32 ret = _SUCCESS;
2116
2117
2118         padapter = precvframe->adapter;
2119
2120         precvpriv = &padapter->recvpriv;
2121
2122         ret = recv_func(padapter, precvframe);
2123         if (ret == _FAIL) {
2124                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("rtw_recv_entry: recv_func return fail!!!\n"));
2125                 goto _recv_entry_drop;
2126         }
2127
2128         precvpriv->rx_pkts++;
2129
2130
2131         return ret;
2132
2133 _recv_entry_drop:
2134         return ret;
2135 }
2136
2137 void rtw_signal_stat_timer_hdl(unsigned long data)
2138 {
2139         struct adapter *adapter = (struct adapter *)data;
2140         struct recv_priv *recvpriv = &adapter->recvpriv;
2141
2142         u32 tmp_s, tmp_q;
2143         u8 avg_signal_strength = 0;
2144         u8 avg_signal_qual = 0;
2145         u8 _alpha = 3; /*  this value is based on converging_constant = 5000 and sampling_interval = 1000 */
2146
2147         if (adapter->recvpriv.is_signal_dbg) {
2148                 /* update the user specific value, signal_strength_dbg, to signal_strength, rssi */
2149                 adapter->recvpriv.signal_strength = adapter->recvpriv.signal_strength_dbg;
2150                 adapter->recvpriv.rssi = (s8)translate_percentage_to_dbm((u8)adapter->recvpriv.signal_strength_dbg);
2151         } else {
2152                 if (recvpriv->signal_strength_data.update_req == 0) {/*  update_req is clear, means we got rx */
2153                         avg_signal_strength = recvpriv->signal_strength_data.avg_val;
2154                         /*  after avg_vals are acquired, we can re-stat the signal values */
2155                         recvpriv->signal_strength_data.update_req = 1;
2156                 }
2157
2158                 if (recvpriv->signal_qual_data.update_req == 0) {/*  update_req is clear, means we got rx */
2159                         avg_signal_qual = recvpriv->signal_qual_data.avg_val;
2160                         /*  after avg_vals are acquired, we can re-stat the signal values */
2161                         recvpriv->signal_qual_data.update_req = 1;
2162                 }
2163
2164                 /* update value of signal_strength, rssi, signal_qual */
2165                 if (check_fwstate(&adapter->mlmepriv, _FW_UNDER_SURVEY) == false) {
2166                         tmp_s = avg_signal_strength+(_alpha-1)*recvpriv->signal_strength;
2167                         if (tmp_s % _alpha)
2168                                 tmp_s = tmp_s/_alpha + 1;
2169                         else
2170                                 tmp_s = tmp_s/_alpha;
2171                         if (tmp_s > 100)
2172                                 tmp_s = 100;
2173
2174                         tmp_q = avg_signal_qual+(_alpha-1)*recvpriv->signal_qual;
2175                         if (tmp_q % _alpha)
2176                                 tmp_q = tmp_q/_alpha + 1;
2177                         else
2178                                 tmp_q = tmp_q/_alpha;
2179                         if (tmp_q > 100)
2180                                 tmp_q = 100;
2181
2182                         recvpriv->signal_strength = tmp_s;
2183                         recvpriv->rssi = (s8)translate_percentage_to_dbm(tmp_s);
2184                         recvpriv->signal_qual = tmp_q;
2185                 }
2186         }
2187         rtw_set_signal_stat_timer(recvpriv);
2188 }