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 <linux/ieee80211.h>
  23
  24 #include <osdep_service.h>
  25 #include <drv_types.h>
  26 #include <recv_osdep.h>
  27 #include <mlme_osdep.h>
  28 #include <wifi.h>
  29 #include <linux/vmalloc.h>
  30
  31 #define ETHERNET_HEADER_SIZE    14      /*  Ethernet Header Length */
  32 #define LLC_HEADER_SIZE                 6       /*  LLC Header Length */
  33
  34 static u8 SNAP_ETH_TYPE_IPX[2] = {0x81, 0x37};
  35 static u8 SNAP_ETH_TYPE_APPLETALK_AARP[2] = {0x80, 0xf3};
  36
  37 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
  38 static u8 rtw_bridge_tunnel_header[] = {
  39        0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8
  40 };
  41
  42 static u8 rtw_rfc1042_header[] = {
  43        0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00
  44 };
  45
  46 void rtw_signal_stat_timer_hdl(unsigned long data);
  47
  48 void _rtw_init_sta_recv_priv(struct sta_recv_priv *psta_recvpriv)
  49 {
  50
  51         memset((u8 *)psta_recvpriv, 0, sizeof(struct sta_recv_priv));
  52
  53         spin_lock_init(&psta_recvpriv->lock);
  54
  55         _rtw_init_queue(&psta_recvpriv->defrag_q);
  56
  57 }
  58
  59 int _rtw_init_recv_priv(struct recv_priv *precvpriv, struct adapter *padapter)
  60 {
  61         int i;
  62
  63         struct recv_frame *precvframe;
  64
  65         int     res = _SUCCESS;
  66
  67         _rtw_init_queue(&precvpriv->free_recv_queue);
  68         _rtw_init_queue(&precvpriv->recv_pending_queue);
  69         _rtw_init_queue(&precvpriv->uc_swdec_pending_queue);
  70
  71         precvpriv->adapter = padapter;
  72
  73         precvpriv->free_recvframe_cnt = NR_RECVFRAME;
  74
  75         precvpriv->pallocated_frame_buf = vzalloc(NR_RECVFRAME * sizeof(struct recv_frame) + RXFRAME_ALIGN_SZ);
  76
  77         if (!precvpriv->pallocated_frame_buf)
  78                 return _FAIL;
  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                 rtw_os_recv_resource_alloc(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
 109         return res;
 110 }
 111
 112 void _rtw_free_recv_priv(struct recv_priv *precvpriv)
 113 {
 114         struct adapter  *padapter = precvpriv->adapter;
 115
 116         rtw_free_uc_swdec_pending_queue(padapter);
 117
 118         if (precvpriv->pallocated_frame_buf) {
 119                 vfree(precvpriv->pallocated_frame_buf);
 120         }
 121
 122         rtw_hal_free_recv_priv(padapter);
 123
 124 }
 125
 126 struct recv_frame *_rtw_alloc_recvframe(struct __queue *pfree_recv_queue)
 127 {
 128         struct recv_frame *hdr;
 129         struct list_head *plist, *phead;
 130         struct adapter *padapter;
 131         struct recv_priv *precvpriv;
 132
 133         if (list_empty(&pfree_recv_queue->queue)) {
 134                 hdr = NULL;
 135         } else {
 136                 phead = get_list_head(pfree_recv_queue);
 137
 138                 plist = phead->next;
 139
 140                 hdr = container_of(plist, struct recv_frame, list);
 141
 142                 list_del_init(&hdr->list);
 143                 padapter = hdr->adapter;
 144                 if (padapter != NULL) {
 145                         precvpriv = &padapter->recvpriv;
 146                         if (pfree_recv_queue == &precvpriv->free_recv_queue)
 147                                 precvpriv->free_recvframe_cnt--;
 148                 }
 149         }
 150
 151         return (struct recv_frame *)hdr;
 152 }
 153
 154 struct recv_frame *rtw_alloc_recvframe(struct __queue *pfree_recv_queue)
 155 {
 156         struct recv_frame  *precvframe;
 157
 158         spin_lock_bh(&pfree_recv_queue->lock);
 159
 160         precvframe = _rtw_alloc_recvframe(pfree_recv_queue);
 161
 162         spin_unlock_bh(&pfree_recv_queue->lock);
 163
 164         return precvframe;
 165 }
 166
 167 int rtw_free_recvframe(struct recv_frame *precvframe,
 168                        struct __queue *pfree_recv_queue)
 169 {
 170         struct adapter *padapter;
 171         struct recv_priv *precvpriv;
 172
 173         if (!precvframe)
 174                 return _FAIL;
 175         padapter = precvframe->adapter;
 176         precvpriv = &padapter->recvpriv;
 177         if (precvframe->pkt) {
 178                 dev_kfree_skb_any(precvframe->pkt);/* free skb by driver */
 179                 precvframe->pkt = NULL;
 180         }
 181
 182         spin_lock_bh(&pfree_recv_queue->lock);
 183
 184         list_del_init(&(precvframe->list));
 185
 186         precvframe->len = 0;
 187
 188         list_add_tail(&(precvframe->list), get_list_head(pfree_recv_queue));
 189
 190         if (padapter != NULL) {
 191                 if (pfree_recv_queue == &precvpriv->free_recv_queue)
 192                                 precvpriv->free_recvframe_cnt++;
 193         }
 194
 195       spin_unlock_bh(&pfree_recv_queue->lock);
 196
 197         return _SUCCESS;
 198 }
 199
 200 int _rtw_enqueue_recvframe(struct recv_frame *precvframe, struct __queue *queue)
 201 {
 202         struct adapter *padapter = precvframe->adapter;
 203         struct recv_priv *precvpriv = &padapter->recvpriv;
 204
 205         list_del_init(&(precvframe->list));
 206         list_add_tail(&(precvframe->list), get_list_head(queue));
 207
 208         if (padapter != NULL) {
 209                 if (queue == &precvpriv->free_recv_queue)
 210                         precvpriv->free_recvframe_cnt++;
 211         }
 212
 213         return _SUCCESS;
 214 }
 215
 216 int rtw_enqueue_recvframe(struct recv_frame *precvframe, struct __queue *queue)
 217 {
 218         int ret;
 219
 220         spin_lock_bh(&queue->lock);
 221         ret = _rtw_enqueue_recvframe(precvframe, queue);
 222         spin_unlock_bh(&queue->lock);
 223
 224         return ret;
 225 }
 226
 227 /*
 228 caller : defrag ; recvframe_chk_defrag in recv_thread  (passive)
 229 pframequeue: defrag_queue : will be accessed in recv_thread  (passive)
 230
 231 using spinlock to protect
 232
 233 */
 234
 235 void rtw_free_recvframe_queue(struct __queue *pframequeue,  struct __queue *pfree_recv_queue)
 236 {
 237         struct recv_frame *hdr;
 238         struct list_head *plist, *phead;
 239
 240         spin_lock(&pframequeue->lock);
 241
 242         phead = get_list_head(pframequeue);
 243         plist = phead->next;
 244
 245         while (phead != plist) {
 246                 hdr = container_of(plist, struct recv_frame, list);
 247
 248                 plist = plist->next;
 249
 250                 rtw_free_recvframe((struct recv_frame *)hdr, pfree_recv_queue);
 251         }
 252
 253         spin_unlock(&pframequeue->lock);
 254
 255 }
 256
 257 u32 rtw_free_uc_swdec_pending_queue(struct adapter *adapter)
 258 {
 259         u32 cnt = 0;
 260         struct recv_frame *pending_frame;
 261         while ((pending_frame = rtw_alloc_recvframe(&adapter->recvpriv.uc_swdec_pending_queue))) {
 262                 rtw_free_recvframe(pending_frame, &adapter->recvpriv.free_recv_queue);
 263                 DBG_88E("%s: dequeue uc_swdec_pending_queue\n", __func__);
 264                 cnt++;
 265         }
 266
 267         return cnt;
 268 }
 269
 270 static int recvframe_chkmic(struct adapter *adapter,
 271                             struct recv_frame *precvframe)
 272 {
 273         int     i, res = _SUCCESS;
 274         u32     datalen;
 275         u8      miccode[8];
 276         u8      bmic_err = false, brpt_micerror = true;
 277         u8      *pframe, *payload, *pframemic;
 278         u8      *mickey;
 279         struct  sta_info                *stainfo;
 280         struct  rx_pkt_attrib   *prxattrib = &precvframe->attrib;
 281         struct  security_priv   *psecuritypriv = &adapter->securitypriv;
 282
 283         struct mlme_ext_priv    *pmlmeext = &adapter->mlmeextpriv;
 284         struct mlme_ext_info    *pmlmeinfo = &(pmlmeext->mlmext_info);
 285
 286         stainfo = rtw_get_stainfo(&adapter->stapriv, &prxattrib->ta[0]);
 287
 288         if (prxattrib->encrypt == _TKIP_) {
 289                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n recvframe_chkmic:prxattrib->encrypt==_TKIP_\n"));
 290                 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",
 291                          prxattrib->ra[0], prxattrib->ra[1], prxattrib->ra[2], prxattrib->ra[3], prxattrib->ra[4], prxattrib->ra[5]));
 292
 293                 /* calculate mic code */
 294                 if (stainfo != NULL) {
 295                         if (IS_MCAST(prxattrib->ra)) {
 296                                 if (!psecuritypriv) {
 297                                         res = _FAIL;
 298                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("\n recvframe_chkmic:didn't install group key!!!!!!!!!!\n"));
 299                                         DBG_88E("\n recvframe_chkmic:didn't install group key!!!!!!!!!!\n");
 300                                         goto exit;
 301                                 }
 302                                 mickey = &psecuritypriv->dot118021XGrprxmickey[prxattrib->key_index].skey[0];
 303
 304                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n recvframe_chkmic: bcmc key\n"));
 305                         } else {
 306                                 mickey = &stainfo->dot11tkiprxmickey.skey[0];
 307                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("\n recvframe_chkmic: unicast key\n"));
 308                         }
 309
 310                         /* icv_len included the mic code */
 311                         datalen = precvframe->len-prxattrib->hdrlen -
 312                                   prxattrib->iv_len-prxattrib->icv_len-8;
 313                         pframe = precvframe->rx_data;
 314                         payload = pframe+prxattrib->hdrlen+prxattrib->iv_len;
 315
 316                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n prxattrib->iv_len=%d prxattrib->icv_len=%d\n", prxattrib->iv_len, prxattrib->icv_len));
 317                         rtw_seccalctkipmic(mickey, pframe, payload, datalen, &miccode[0],
 318                                            (unsigned char)prxattrib->priority); /* care the length of the data */
 319
 320                         pframemic = payload+datalen;
 321
 322                         bmic_err = false;
 323
 324                         for (i = 0; i < 8; i++) {
 325                                 if (miccode[i] != *(pframemic+i)) {
 326                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
 327                                                  ("recvframe_chkmic:miccode[%d](%02x)!=*(pframemic+%d)(%02x) ",
 328                                                  i, miccode[i], i, *(pframemic+i)));
 329                                         bmic_err = true;
 330                                 }
 331                         }
 332
 333                         if (bmic_err) {
 334                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
 335                                          ("\n *(pframemic-8)-*(pframemic-1)=0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n",
 336                                          *(pframemic-8), *(pframemic-7), *(pframemic-6),
 337                                          *(pframemic-5), *(pframemic-4), *(pframemic-3),
 338                                          *(pframemic-2), *(pframemic-1)));
 339                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
 340                                          ("\n *(pframemic-16)-*(pframemic-9)=0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n",
 341                                          *(pframemic-16), *(pframemic-15), *(pframemic-14),
 342                                          *(pframemic-13), *(pframemic-12), *(pframemic-11),
 343                                          *(pframemic-10), *(pframemic-9)));
 344                                 {
 345                                         uint i;
 346                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
 347                                                  ("\n ======demp packet (len=%d)======\n",
 348                                                  precvframe->len));
 349                                         for (i = 0; i < precvframe->len; i += 8) {
 350                                                 RT_TRACE(_module_rtl871x_recv_c_,
 351                                                          _drv_err_,
 352                                                          ("0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x",
 353                                                          *(precvframe->rx_data+i),
 354                                                          *(precvframe->rx_data+i+1),
 355                                                          *(precvframe->rx_data+i+2),
 356                                                          *(precvframe->rx_data+i+3),
 357                                                          *(precvframe->rx_data+i+4),
 358                                                          *(precvframe->rx_data+i+5),
 359                                                          *(precvframe->rx_data+i+6),
 360                                                          *(precvframe->rx_data+i+7)));
 361                                         }
 362                                         RT_TRACE(_module_rtl871x_recv_c_,
 363                                                  _drv_err_,
 364                                                  ("\n ====== demp packet end [len=%d]======\n",
 365                                                  precvframe->len));
 366                                         RT_TRACE(_module_rtl871x_recv_c_,
 367                                                  _drv_err_,
 368                                                  ("\n hrdlen=%d,\n",
 369                                                  prxattrib->hdrlen));
 370                                 }
 371
 372                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
 373                                          ("ra=0x%.2x 0x%.2x 0x%.2x 0x%.2x 0x%.2x 0x%.2x psecuritypriv->binstallGrpkey=%d ",
 374                                          prxattrib->ra[0], prxattrib->ra[1], prxattrib->ra[2],
 375                                          prxattrib->ra[3], prxattrib->ra[4], prxattrib->ra[5], psecuritypriv->binstallGrpkey));
 376
 377                                 /*  double check key_index for some timing issue , */
 378                                 /*  cannot compare with psecuritypriv->dot118021XGrpKeyid also cause timing issue */
 379                                 if ((IS_MCAST(prxattrib->ra) == true)  && (prxattrib->key_index != pmlmeinfo->key_index))
 380                                         brpt_micerror = false;
 381
 382                                 if ((prxattrib->bdecrypted) && (brpt_micerror)) {
 383                                         rtw_handle_tkip_mic_err(adapter, (u8)IS_MCAST(prxattrib->ra));
 384                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" mic error :prxattrib->bdecrypted=%d ", prxattrib->bdecrypted));
 385                                         DBG_88E(" mic error :prxattrib->bdecrypted=%d\n", prxattrib->bdecrypted);
 386                                 } else {
 387                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" mic error :prxattrib->bdecrypted=%d ", prxattrib->bdecrypted));
 388                                         DBG_88E(" mic error :prxattrib->bdecrypted=%d\n", prxattrib->bdecrypted);
 389                                 }
 390                                 res = _FAIL;
 391                         } else {
 392                                 /* mic checked ok */
 393                                 if ((!psecuritypriv->bcheck_grpkey) && (IS_MCAST(prxattrib->ra))) {
 394                                         psecuritypriv->bcheck_grpkey = true;
 395                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("psecuritypriv->bcheck_grpkey = true"));
 396                                 }
 397                         }
 398                 } else {
 399                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recvframe_chkmic: rtw_get_stainfo==NULL!!!\n"));
 400                 }
 401
 402                 recvframe_pull_tail(precvframe, 8);
 403         }
 404
 405 exit:
 406
 407         return res;
 408 }
 409
 410 /* decrypt and set the ivlen, icvlen of the recv_frame */
 411 static struct recv_frame *decryptor(struct adapter *padapter,
 412                                     struct recv_frame *precv_frame)
 413 {
 414         struct rx_pkt_attrib *prxattrib = &precv_frame->attrib;
 415         struct security_priv *psecuritypriv = &padapter->securitypriv;
 416         struct recv_frame *return_packet = precv_frame;
 417         u32      res = _SUCCESS;
 418
 419         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("prxstat->decrypted=%x prxattrib->encrypt=0x%03x\n", prxattrib->bdecrypted, prxattrib->encrypt));
 420
 421         if (prxattrib->encrypt > 0) {
 422                 u8 *iv = precv_frame->rx_data+prxattrib->hdrlen;
 423                 prxattrib->key_index = (((iv[3])>>6)&0x3);
 424
 425                 if (prxattrib->key_index > WEP_KEYS) {
 426                         DBG_88E("prxattrib->key_index(%d)>WEP_KEYS\n", prxattrib->key_index);
 427
 428                         switch (prxattrib->encrypt) {
 429                         case _WEP40_:
 430                         case _WEP104_:
 431                                 prxattrib->key_index = psecuritypriv->dot11PrivacyKeyIndex;
 432                                 break;
 433                         case _TKIP_:
 434                         case _AES_:
 435                         default:
 436                                 prxattrib->key_index = psecuritypriv->dot118021XGrpKeyid;
 437                                 break;
 438                         }
 439                 }
 440         }
 441
 442         if ((prxattrib->encrypt > 0) && ((prxattrib->bdecrypted == 0) || (psecuritypriv->sw_decrypt))) {
 443                 psecuritypriv->hw_decrypted = false;
 444
 445                 switch (prxattrib->encrypt) {
 446                 case _WEP40_:
 447                 case _WEP104_:
 448                         rtw_wep_decrypt(padapter, (u8 *)precv_frame);
 449                         break;
 450                 case _TKIP_:
 451                         res = rtw_tkip_decrypt(padapter, (u8 *)precv_frame);
 452                         break;
 453                 case _AES_:
 454                         res = rtw_aes_decrypt(padapter, (u8 *)precv_frame);
 455                         break;
 456                 default:
 457                         break;
 458                 }
 459         } else if (prxattrib->bdecrypted == 1 && prxattrib->encrypt > 0 &&
 460                    (psecuritypriv->busetkipkey == 1 || prxattrib->encrypt != _TKIP_))
 461                         psecuritypriv->hw_decrypted = true;
 462
 463         if (res == _FAIL) {
 464                 rtw_free_recvframe(return_packet, &padapter->recvpriv.free_recv_queue);
 465                 return_packet = NULL;
 466         }
 467
 468         return return_packet;
 469 }
 470
 471 /* set the security information in the recv_frame */
 472 static struct recv_frame *portctrl(struct adapter *adapter,
 473                                    struct recv_frame *precv_frame)
 474 {
 475         u8   *psta_addr, *ptr;
 476         uint  auth_alg;
 477         struct recv_frame *pfhdr;
 478         struct sta_info *psta;
 479         struct sta_priv *pstapriv;
 480         struct recv_frame *prtnframe;
 481         u16     ether_type;
 482         u16  eapol_type = 0x888e;/* for Funia BD's WPA issue */
 483         struct rx_pkt_attrib *pattrib;
 484         __be16 be_tmp;
 485
 486         pstapriv = &adapter->stapriv;
 487
 488         auth_alg = adapter->securitypriv.dot11AuthAlgrthm;
 489
 490         ptr = precv_frame->rx_data;
 491         pfhdr = precv_frame;
 492         pattrib = &pfhdr->attrib;
 493         psta_addr = pattrib->ta;
 494         psta = rtw_get_stainfo(pstapriv, psta_addr);
 495
 496         prtnframe = NULL;
 497
 498         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:adapter->securitypriv.dot11AuthAlgrthm=%d\n", adapter->securitypriv.dot11AuthAlgrthm));
 499
 500         if (auth_alg == 2) {
 501                 /* get ether_type */
 502                 ptr = ptr + pfhdr->attrib.hdrlen + LLC_HEADER_SIZE;
 503                 memcpy(&be_tmp, ptr, 2);
 504                 ether_type = ntohs(be_tmp);
 505
 506                 if ((psta != NULL) && (psta->ieee8021x_blocked)) {
 507                         /* blocked */
 508                         /* only accept EAPOL frame */
 509                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:psta->ieee8021x_blocked==1\n"));
 510
 511                         if (ether_type == eapol_type) {
 512                                 prtnframe = precv_frame;
 513                         } else {
 514                                 /* free this frame */
 515                                 rtw_free_recvframe(precv_frame, &adapter->recvpriv.free_recv_queue);
 516                                 prtnframe = NULL;
 517                         }
 518                 } else {
 519                         /* allowed */
 520                         /* check decryption status, and decrypt the frame if needed */
 521                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:psta->ieee8021x_blocked==0\n"));
 522                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
 523                                  ("portctrl:precv_frame->hdr.attrib.privacy=%x\n",
 524                                  precv_frame->attrib.privacy));
 525
 526                         if (pattrib->bdecrypted == 0)
 527                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("portctrl:prxstat->decrypted=%x\n", pattrib->bdecrypted));
 528
 529                         prtnframe = precv_frame;
 530                         /* check is the EAPOL frame or not (Rekey) */
 531                         if (ether_type == eapol_type) {
 532                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("########portctrl:ether_type==0x888e\n"));
 533                                 /* check Rekey */
 534
 535                                 prtnframe = precv_frame;
 536                         } else {
 537                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:ether_type=0x%04x\n", ether_type));
 538                         }
 539                 }
 540         } else {
 541                 prtnframe = precv_frame;
 542         }
 543
 544                 return prtnframe;
 545 }
 546
 547 static int recv_decache(struct recv_frame *precv_frame, u8 bretry,
 548                         struct stainfo_rxcache *prxcache)
 549 {
 550         int tid = precv_frame->attrib.priority;
 551
 552         u16 seq_ctrl = ((precv_frame->attrib.seq_num&0xffff) << 4) |
 553                 (precv_frame->attrib.frag_num & 0xf);
 554
 555         if (tid > 15) {
 556                 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("recv_decache, (tid>15)! seq_ctrl=0x%x, tid=0x%x\n", seq_ctrl, tid));
 557
 558                 return _FAIL;
 559         }
 560
 561         if (1) {/* if (bretry) */
 562                 if (seq_ctrl == prxcache->tid_rxseq[tid]) {
 563                         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]));
 564
 565                         return _FAIL;
 566                 }
 567         }
 568
 569         prxcache->tid_rxseq[tid] = seq_ctrl;
 570
 571         return _SUCCESS;
 572 }
 573
 574 static void process_pwrbit_data(struct adapter *padapter,
 575                                 struct recv_frame *precv_frame)
 576 {
 577 #ifdef CONFIG_88EU_AP_MODE
 578         unsigned char pwrbit;
 579         u8 *ptr = precv_frame->rx_data;
 580         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 581         struct sta_priv *pstapriv = &padapter->stapriv;
 582         struct sta_info *psta = NULL;
 583
 584         psta = rtw_get_stainfo(pstapriv, pattrib->src);
 585
 586         pwrbit = GetPwrMgt(ptr);
 587
 588         if (psta) {
 589                 if (pwrbit) {
 590                         if (!(psta->state & WIFI_SLEEP_STATE))
 591                                 stop_sta_xmit(padapter, psta);
 592                 } else {
 593                         if (psta->state & WIFI_SLEEP_STATE)
 594                                 wakeup_sta_to_xmit(padapter, psta);
 595                 }
 596         }
 597
 598 #endif
 599 }
 600
 601 static void process_wmmps_data(struct adapter *padapter,
 602                                struct recv_frame *precv_frame)
 603 {
 604 #ifdef CONFIG_88EU_AP_MODE
 605         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 606         struct sta_priv *pstapriv = &padapter->stapriv;
 607         struct sta_info *psta = NULL;
 608
 609         psta = rtw_get_stainfo(pstapriv, pattrib->src);
 610
 611         if (!psta)
 612                 return;
 613
 614         if (!psta->qos_option)
 615                 return;
 616
 617         if (!(psta->qos_info&0xf))
 618                 return;
 619
 620         if (psta->state&WIFI_SLEEP_STATE) {
 621                 u8 wmmps_ac = 0;
 622
 623                 switch (pattrib->priority) {
 624                 case 1:
 625                 case 2:
 626                         wmmps_ac = psta->uapsd_bk&BIT(1);
 627                         break;
 628                 case 4:
 629                 case 5:
 630                         wmmps_ac = psta->uapsd_vi&BIT(1);
 631                         break;
 632                 case 6:
 633                 case 7:
 634                         wmmps_ac = psta->uapsd_vo&BIT(1);
 635                         break;
 636                 case 0:
 637                 case 3:
 638                 default:
 639                         wmmps_ac = psta->uapsd_be&BIT(1);
 640                         break;
 641                 }
 642
 643                 if (wmmps_ac) {
 644                         if (psta->sleepq_ac_len > 0) {
 645                                 /* process received triggered frame */
 646                                 xmit_delivery_enabled_frames(padapter, psta);
 647                         } else {
 648                                 /* issue one qos null frame with More data bit = 0 and the EOSP bit set (= 1) */
 649                                 issue_qos_nulldata(padapter, psta->hwaddr, (u16)pattrib->priority, 0, 0);
 650                         }
 651                 }
 652         }
 653
 654 #endif
 655 }
 656
 657 static void count_rx_stats(struct adapter *padapter,
 658                            struct recv_frame *prframe,
 659                            struct sta_info *sta)
 660 {
 661         int     sz;
 662         struct sta_info         *psta = NULL;
 663         struct stainfo_stats    *pstats = NULL;
 664         struct rx_pkt_attrib    *pattrib = &prframe->attrib;
 665         struct recv_priv        *precvpriv = &padapter->recvpriv;
 666
 667         sz = prframe->len;
 668         precvpriv->rx_bytes += sz;
 669
 670         padapter->mlmepriv.LinkDetectInfo.NumRxOkInPeriod++;
 671
 672         if ((!MacAddr_isBcst(pattrib->dst)) && (!IS_MCAST(pattrib->dst)))
 673                 padapter->mlmepriv.LinkDetectInfo.NumRxUnicastOkInPeriod++;
 674
 675         if (sta)
 676                 psta = sta;
 677         else
 678                 psta = prframe->psta;
 679
 680         if (psta) {
 681                 pstats = &psta->sta_stats;
 682
 683                 pstats->rx_data_pkts++;
 684                 pstats->rx_bytes += sz;
 685         }
 686 }
 687
 688 int sta2sta_data_frame(
 689         struct adapter *adapter,
 690         struct recv_frame *precv_frame,
 691         struct sta_info **psta
 692 );
 693
 694 int sta2sta_data_frame(struct adapter *adapter, struct recv_frame *precv_frame,
 695                        struct sta_info **psta)
 696 {
 697         u8 *ptr = precv_frame->rx_data;
 698         int ret = _SUCCESS;
 699         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 700         struct  sta_priv *pstapriv = &adapter->stapriv;
 701         struct  mlme_priv *pmlmepriv = &adapter->mlmepriv;
 702         u8 *mybssid  = get_bssid(pmlmepriv);
 703         u8 *myhwaddr = myid(&adapter->eeprompriv);
 704         u8 *sta_addr = NULL;
 705         int bmcast = IS_MCAST(pattrib->dst);
 706
 707         if ((check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) == true) ||
 708             (check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE) == true)) {
 709                 /*  filter packets that SA is myself or multicast or broadcast */
 710                 if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN)) {
 711                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" SA==myself\n"));
 712                         ret = _FAIL;
 713                         goto exit;
 714                 }
 715
 716                 if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast)) {
 717                         ret = _FAIL;
 718                         goto exit;
 719                 }
 720
 721                 if (!memcmp(pattrib->bssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
 722                     !memcmp(mybssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
 723                     memcmp(pattrib->bssid, mybssid, ETH_ALEN)) {
 724                         ret = _FAIL;
 725                         goto exit;
 726                 }
 727
 728                 sta_addr = pattrib->src;
 729         } else if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
 730                 /*  For Station mode, sa and bssid should always be BSSID, and DA is my mac-address */
 731                 if (memcmp(pattrib->bssid, pattrib->src, ETH_ALEN)) {
 732                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("bssid!=TA under STATION_MODE; drop pkt\n"));
 733                         ret = _FAIL;
 734                         goto exit;
 735                 }
 736                 sta_addr = pattrib->bssid;
 737         } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
 738                 if (bmcast) {
 739                         /*  For AP mode, if DA == MCAST, then BSSID should be also MCAST */
 740                         if (!IS_MCAST(pattrib->bssid)) {
 741                                         ret = _FAIL;
 742                                         goto exit;
 743                         }
 744                 } else { /*  not mc-frame */
 745                         /*  For AP mode, if DA is non-MCAST, then it must be BSSID, and bssid == BSSID */
 746                         if (memcmp(pattrib->bssid, pattrib->dst, ETH_ALEN)) {
 747                                 ret = _FAIL;
 748                                 goto exit;
 749                         }
 750
 751                         sta_addr = pattrib->src;
 752                 }
 753         } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
 754                 memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN);
 755                 memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN);
 756                 memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN);
 757                 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
 758                 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
 759
 760                 sta_addr = mybssid;
 761         } else {
 762                 ret  = _FAIL;
 763         }
 764
 765         if (bmcast)
 766                 *psta = rtw_get_bcmc_stainfo(adapter);
 767         else
 768                 *psta = rtw_get_stainfo(pstapriv, sta_addr); /*  get ap_info */
 769
 770         if (*psta == NULL) {
 771                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("can't get psta under sta2sta_data_frame ; drop pkt\n"));
 772                 ret = _FAIL;
 773                 goto exit;
 774         }
 775
 776 exit:
 777         return ret;
 778 }
 779
 780 static int ap2sta_data_frame(
 781         struct adapter *adapter,
 782         struct recv_frame *precv_frame,
 783         struct sta_info **psta)
 784 {
 785         u8 *ptr = precv_frame->rx_data;
 786         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 787         int ret = _SUCCESS;
 788         struct  sta_priv *pstapriv = &adapter->stapriv;
 789         struct  mlme_priv *pmlmepriv = &adapter->mlmepriv;
 790         u8 *mybssid  = get_bssid(pmlmepriv);
 791         u8 *myhwaddr = myid(&adapter->eeprompriv);
 792         int bmcast = IS_MCAST(pattrib->dst);
 793
 794         if ((check_fwstate(pmlmepriv, WIFI_STATION_STATE) == true) &&
 795             (check_fwstate(pmlmepriv, _FW_LINKED) == true ||
 796             check_fwstate(pmlmepriv, _FW_UNDER_LINKING))) {
 797                 /*  filter packets that SA is myself or multicast or broadcast */
 798                 if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN)) {
 799                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" SA==myself\n"));
 800                         ret = _FAIL;
 801                         goto exit;
 802                 }
 803
 804                 /*  da should be for me */
 805                 if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast)) {
 806                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
 807                                  (" ap2sta_data_frame:  compare DA fail; DA=%pM\n", (pattrib->dst)));
 808                         ret = _FAIL;
 809                         goto exit;
 810                 }
 811
 812                 /*  check BSSID */
 813                 if (!memcmp(pattrib->bssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
 814                     !memcmp(mybssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
 815                      (memcmp(pattrib->bssid, mybssid, ETH_ALEN))) {
 816                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
 817                                  (" ap2sta_data_frame:  compare BSSID fail ; BSSID=%pM\n", (pattrib->bssid)));
 818                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("mybssid=%pM\n", (mybssid)));
 819
 820                         if (!bmcast) {
 821                                 DBG_88E("issue_deauth to the nonassociated ap=%pM for the reason(7)\n", (pattrib->bssid));
 822                                 issue_deauth(adapter, pattrib->bssid, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
 823                         }
 824
 825                         ret = _FAIL;
 826                         goto exit;
 827                 }
 828
 829                 if (bmcast)
 830                         *psta = rtw_get_bcmc_stainfo(adapter);
 831                 else
 832                         *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /*  get ap_info */
 833
 834                 if (*psta == NULL) {
 835                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("ap2sta: can't get psta under STATION_MODE ; drop pkt\n"));
 836                         ret = _FAIL;
 837                         goto exit;
 838                 }
 839
 840                 /* if ((GetFrameSubType(ptr) & WIFI_QOS_DATA_TYPE) == WIFI_QOS_DATA_TYPE) { */
 841                 /*  */
 842
 843                 if (GetFrameSubType(ptr) & BIT(6)) {
 844                         /* No data, will not indicate to upper layer, temporily count it here */
 845                         count_rx_stats(adapter, precv_frame, *psta);
 846                         ret = RTW_RX_HANDLED;
 847                         goto exit;
 848                 }
 849         } else if ((check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) &&
 850                    (check_fwstate(pmlmepriv, _FW_LINKED) == true)) {
 851                 memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN);
 852                 memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN);
 853                 memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN);
 854                 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
 855                 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
 856
 857                 /*  */
 858                 memcpy(pattrib->bssid,  mybssid, ETH_ALEN);
 859
 860                 *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /*  get sta_info */
 861                 if (*psta == NULL) {
 862                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("can't get psta under MP_MODE ; drop pkt\n"));
 863                         ret = _FAIL;
 864                         goto exit;
 865                 }
 866         } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
 867                 /* Special case */
 868                 ret = RTW_RX_HANDLED;
 869                 goto exit;
 870         } else {
 871                 if (!memcmp(myhwaddr, pattrib->dst, ETH_ALEN) && (!bmcast)) {
 872                         *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /*  get sta_info */
 873                         if (*psta == NULL) {
 874                                 DBG_88E("issue_deauth to the ap =%pM for the reason(7)\n", (pattrib->bssid));
 875
 876                                 issue_deauth(adapter, pattrib->bssid, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
 877                         }
 878                 }
 879
 880                 ret = _FAIL;
 881         }
 882
 883 exit:
 884
 885         return ret;
 886 }
 887
 888 static int sta2ap_data_frame(struct adapter *adapter,
 889                              struct recv_frame *precv_frame,
 890                              struct sta_info **psta)
 891 {
 892         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 893         struct  sta_priv *pstapriv = &adapter->stapriv;
 894         struct  mlme_priv *pmlmepriv = &adapter->mlmepriv;
 895         u8 *ptr = precv_frame->rx_data;
 896         unsigned char *mybssid  = get_bssid(pmlmepriv);
 897         int ret = _SUCCESS;
 898
 899         if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) {
 900                 /* For AP mode, RA = BSSID, TX = STA(SRC_ADDR), A3 = DST_ADDR */
 901                 if (memcmp(pattrib->bssid, mybssid, ETH_ALEN)) {
 902                         ret = _FAIL;
 903                         goto exit;
 904                 }
 905
 906                 *psta = rtw_get_stainfo(pstapriv, pattrib->src);
 907                 if (*psta == NULL) {
 908                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("can't get psta under AP_MODE; drop pkt\n"));
 909                         DBG_88E("issue_deauth to sta=%pM for the reason(7)\n", (pattrib->src));
 910
 911                         issue_deauth(adapter, pattrib->src, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
 912
 913                         ret = RTW_RX_HANDLED;
 914                         goto exit;
 915                 }
 916
 917                 process_pwrbit_data(adapter, precv_frame);
 918
 919                 if ((GetFrameSubType(ptr) & WIFI_QOS_DATA_TYPE) == WIFI_QOS_DATA_TYPE) {
 920                         process_wmmps_data(adapter, precv_frame);
 921                 }
 922
 923                 if (GetFrameSubType(ptr) & BIT(6)) {
 924                         /* No data, will not indicate to upper layer, temporily count it here */
 925                         count_rx_stats(adapter, precv_frame, *psta);
 926                         ret = RTW_RX_HANDLED;
 927                         goto exit;
 928                 }
 929         } else {
 930                 u8 *myhwaddr = myid(&adapter->eeprompriv);
 931                 if (memcmp(pattrib->ra, myhwaddr, ETH_ALEN)) {
 932                         ret = RTW_RX_HANDLED;
 933                         goto exit;
 934                 }
 935                 DBG_88E("issue_deauth to sta=%pM for the reason(7)\n", (pattrib->src));
 936                 issue_deauth(adapter, pattrib->src, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
 937                 ret = RTW_RX_HANDLED;
 938                 goto exit;
 939         }
 940
 941 exit:
 942
 943         return ret;
 944 }
 945
 946 static int validate_recv_ctrl_frame(struct adapter *padapter,
 947                                     struct recv_frame *precv_frame)
 948 {
 949 #ifdef CONFIG_88EU_AP_MODE
 950         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 951         struct sta_priv *pstapriv = &padapter->stapriv;
 952         u8 *pframe = precv_frame->rx_data;
 953
 954         if (GetFrameType(pframe) != WIFI_CTRL_TYPE)
 955                 return _FAIL;
 956
 957         /* receive the frames that ra(a1) is my address */
 958         if (memcmp(GetAddr1Ptr(pframe), myid(&padapter->eeprompriv), ETH_ALEN))
 959                 return _FAIL;
 960
 961         /* only handle ps-poll */
 962         if (GetFrameSubType(pframe) == WIFI_PSPOLL) {
 963                 u16 aid;
 964                 u8 wmmps_ac = 0;
 965                 struct sta_info *psta = NULL;
 966
 967                 aid = GetAid(pframe);
 968                 psta = rtw_get_stainfo(pstapriv, GetAddr2Ptr(pframe));
 969
 970                 if ((psta == NULL) || (psta->aid != aid))
 971                         return _FAIL;
 972
 973                 /* for rx pkt statistics */
 974                 psta->sta_stats.rx_ctrl_pkts++;
 975
 976                 switch (pattrib->priority) {
 977                 case 1:
 978                 case 2:
 979                         wmmps_ac = psta->uapsd_bk&BIT(0);
 980                         break;
 981                 case 4:
 982                 case 5:
 983                         wmmps_ac = psta->uapsd_vi&BIT(0);
 984                         break;
 985                 case 6:
 986                 case 7:
 987                         wmmps_ac = psta->uapsd_vo&BIT(0);
 988                         break;
 989                 case 0:
 990                 case 3:
 991                 default:
 992                         wmmps_ac = psta->uapsd_be&BIT(0);
 993                         break;
 994                 }
 995
 996                 if (wmmps_ac)
 997                         return _FAIL;
 998
 999                 if (psta->state & WIFI_STA_ALIVE_CHK_STATE) {
1000                         DBG_88E("%s alive check-rx ps-poll\n", __func__);
1001                         psta->expire_to = pstapriv->expire_to;
1002                         psta->state ^= WIFI_STA_ALIVE_CHK_STATE;
1003                 }
1004
1005                 if ((psta->state&WIFI_SLEEP_STATE) && (pstapriv->sta_dz_bitmap&BIT(psta->aid))) {
1006                         struct list_head *xmitframe_plist, *xmitframe_phead;
1007                         struct xmit_frame *pxmitframe = NULL;
1008
1009                         spin_lock_bh(&psta->sleep_q.lock);
1010
1011                         xmitframe_phead = get_list_head(&psta->sleep_q);
1012                         xmitframe_plist = xmitframe_phead->next;
1013
1014                         if (xmitframe_phead != xmitframe_plist) {
1015                                 pxmitframe = container_of(xmitframe_plist, struct xmit_frame, list);
1016
1017                                 xmitframe_plist = xmitframe_plist->next;
1018
1019                                 list_del_init(&pxmitframe->list);
1020
1021                                 psta->sleepq_len--;
1022
1023                                 if (psta->sleepq_len > 0)
1024                                         pxmitframe->attrib.mdata = 1;
1025                                 else
1026                                         pxmitframe->attrib.mdata = 0;
1027
1028                                 pxmitframe->attrib.triggered = 1;
1029
1030                                 spin_unlock_bh(&psta->sleep_q.lock);
1031                                 if (rtw_hal_xmit(padapter, pxmitframe) == true)
1032                                         rtw_os_xmit_complete(padapter, pxmitframe);
1033                                 spin_lock_bh(&psta->sleep_q.lock);
1034
1035                                 if (psta->sleepq_len == 0) {
1036                                         pstapriv->tim_bitmap &= ~BIT(psta->aid);
1037
1038                                         /* update BCN for TIM IE */
1039                                         /* update_BCNTIM(padapter); */
1040                                         update_beacon(padapter, _TIM_IE_, NULL, false);
1041                                 }
1042                         } else {
1043                                 if (pstapriv->tim_bitmap&BIT(psta->aid)) {
1044                                         if (psta->sleepq_len == 0) {
1045                                                 DBG_88E("no buffered packets to xmit\n");
1046
1047                                                 /* issue nulldata with More data bit = 0 to indicate we have no buffered packets */
1048                                                 issue_nulldata(padapter, psta->hwaddr, 0, 0, 0);
1049                                         } else {
1050                                                 DBG_88E("error!psta->sleepq_len=%d\n", psta->sleepq_len);
1051                                                 psta->sleepq_len = 0;
1052                                         }
1053
1054                                         pstapriv->tim_bitmap &= ~BIT(psta->aid);
1055
1056                                         /* update BCN for TIM IE */
1057                                         /* update_BCNTIM(padapter); */
1058                                         update_beacon(padapter, _TIM_IE_, NULL, false);
1059                                 }
1060                         }
1061
1062                         spin_unlock_bh(&psta->sleep_q.lock);
1063                 }
1064         }
1065
1066 #endif
1067
1068         return _FAIL;
1069 }
1070
1071 struct recv_frame *recvframe_chk_defrag(struct adapter *padapter,
1072                                         struct recv_frame *precv_frame);
1073
1074 static int validate_recv_mgnt_frame(struct adapter *padapter,
1075                                     struct recv_frame *precv_frame)
1076 {
1077         struct sta_info *psta;
1078
1079         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("+validate_recv_mgnt_frame\n"));
1080
1081         precv_frame = recvframe_chk_defrag(padapter, precv_frame);
1082         if (precv_frame == NULL) {
1083                 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("%s: fragment packet\n", __func__));
1084                 return _SUCCESS;
1085         }
1086
1087         /* for rx pkt statistics */
1088         psta = rtw_get_stainfo(&padapter->stapriv,
1089                                GetAddr2Ptr(precv_frame->rx_data));
1090         if (psta) {
1091                 psta->sta_stats.rx_mgnt_pkts++;
1092                 if (GetFrameSubType(precv_frame->rx_data) == WIFI_BEACON) {
1093                         psta->sta_stats.rx_beacon_pkts++;
1094                 } else if (GetFrameSubType(precv_frame->rx_data) == WIFI_PROBEREQ) {
1095                         psta->sta_stats.rx_probereq_pkts++;
1096                 } else if (GetFrameSubType(precv_frame->rx_data) == WIFI_PROBERSP) {
1097                         if (!memcmp(padapter->eeprompriv.mac_addr,
1098                                     GetAddr1Ptr(precv_frame->rx_data), ETH_ALEN))
1099                                 psta->sta_stats.rx_probersp_pkts++;
1100                         else if (is_broadcast_mac_addr(GetAddr1Ptr(precv_frame->rx_data)) ||
1101                                  is_multicast_mac_addr(GetAddr1Ptr(precv_frame->rx_data)))
1102                                 psta->sta_stats.rx_probersp_bm_pkts++;
1103                         else
1104                                 psta->sta_stats.rx_probersp_uo_pkts++;
1105                 }
1106         }
1107
1108         mgt_dispatcher(padapter, precv_frame);
1109
1110         return _SUCCESS;
1111 }
1112
1113 static int validate_recv_data_frame(struct adapter *adapter,
1114                                     struct recv_frame *precv_frame)
1115 {
1116         u8 bretry;
1117         u8 *psa, *pda, *pbssid;
1118         struct sta_info *psta = NULL;
1119         u8 *ptr = precv_frame->rx_data;
1120         struct rx_pkt_attrib    *pattrib = &precv_frame->attrib;
1121         struct security_priv    *psecuritypriv = &adapter->securitypriv;
1122         int ret = _SUCCESS;
1123
1124         bretry = GetRetry(ptr);
1125         pda = get_da(ptr);
1126         psa = get_sa(ptr);
1127         pbssid = get_hdr_bssid(ptr);
1128
1129         if (pbssid == NULL) {
1130                 ret = _FAIL;
1131                 goto exit;
1132         }
1133
1134         memcpy(pattrib->dst, pda, ETH_ALEN);
1135         memcpy(pattrib->src, psa, ETH_ALEN);
1136
1137         memcpy(pattrib->bssid, pbssid, ETH_ALEN);
1138
1139         switch (pattrib->to_fr_ds) {
1140         case 0:
1141                 memcpy(pattrib->ra, pda, ETH_ALEN);
1142                 memcpy(pattrib->ta, psa, ETH_ALEN);
1143                 ret = sta2sta_data_frame(adapter, precv_frame, &psta);
1144                 break;
1145         case 1:
1146                 memcpy(pattrib->ra, pda, ETH_ALEN);
1147                 memcpy(pattrib->ta, pbssid, ETH_ALEN);
1148                 ret = ap2sta_data_frame(adapter, precv_frame, &psta);
1149                 break;
1150         case 2:
1151                 memcpy(pattrib->ra, pbssid, ETH_ALEN);
1152                 memcpy(pattrib->ta, psa, ETH_ALEN);
1153                 ret = sta2ap_data_frame(adapter, precv_frame, &psta);
1154                 break;
1155         case 3:
1156                 memcpy(pattrib->ra, GetAddr1Ptr(ptr), ETH_ALEN);
1157                 memcpy(pattrib->ta, GetAddr2Ptr(ptr), ETH_ALEN);
1158                 ret = _FAIL;
1159                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" case 3\n"));
1160                 break;
1161         default:
1162                 ret = _FAIL;
1163                 break;
1164         }
1165
1166         if (ret == _FAIL) {
1167                 goto exit;
1168         } else if (ret == RTW_RX_HANDLED) {
1169                 goto exit;
1170         }
1171
1172         if (psta == NULL) {
1173                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" after to_fr_ds_chk; psta==NULL\n"));
1174                 ret = _FAIL;
1175                 goto exit;
1176         }
1177
1178         /* psta->rssi = prxcmd->rssi; */
1179         /* psta->signal_quality = prxcmd->sq; */
1180         precv_frame->psta = psta;
1181
1182         pattrib->amsdu = 0;
1183         pattrib->ack_policy = 0;
1184         /* parsing QC field */
1185         if (pattrib->qos == 1) {
1186                 pattrib->priority = GetPriority((ptr + 24));
1187                 pattrib->ack_policy = GetAckpolicy((ptr + 24));
1188                 pattrib->amsdu = GetAMsdu((ptr + 24));
1189                 pattrib->hdrlen = pattrib->to_fr_ds == 3 ? 32 : 26;
1190
1191                 if (pattrib->priority != 0 && pattrib->priority != 3)
1192                         adapter->recvpriv.bIsAnyNonBEPkts = true;
1193         } else {
1194                 pattrib->priority = 0;
1195                 pattrib->hdrlen = pattrib->to_fr_ds == 3 ? 30 : 24;
1196         }
1197
1198         if (pattrib->order)/* HT-CTRL 11n */
1199                 pattrib->hdrlen += 4;
1200
1201         precv_frame->preorder_ctrl = &psta->recvreorder_ctrl[pattrib->priority];
1202
1203         /*  decache, drop duplicate recv packets */
1204         if (recv_decache(precv_frame, bretry, &psta->sta_recvpriv.rxcache) == _FAIL) {
1205                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("decache : drop pkt\n"));
1206                 ret = _FAIL;
1207                 goto exit;
1208         }
1209
1210         if (pattrib->privacy) {
1211                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("validate_recv_data_frame:pattrib->privacy=%x\n", pattrib->privacy));
1212                 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)));
1213
1214                 GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt, IS_MCAST(pattrib->ra));
1215
1216                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n pattrib->encrypt=%d\n", pattrib->encrypt));
1217
1218                 SET_ICE_IV_LEN(pattrib->iv_len, pattrib->icv_len, pattrib->encrypt);
1219         } else {
1220                 pattrib->encrypt = 0;
1221                 pattrib->iv_len = 0;
1222                 pattrib->icv_len = 0;
1223         }
1224
1225 exit:
1226
1227         return ret;
1228 }
1229
1230 static int validate_recv_frame(struct adapter *adapter,
1231                                struct recv_frame *precv_frame)
1232 {
1233         /* shall check frame subtype, to / from ds, da, bssid */
1234
1235         /* then call check if rx seq/frag. duplicated. */
1236
1237         u8 type;
1238         u8 subtype;
1239         int retval = _SUCCESS;
1240         u8 bDumpRxPkt;
1241         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
1242         u8 *ptr = precv_frame->rx_data;
1243         u8  ver = (unsigned char)(*ptr)&0x3;
1244         struct mlme_ext_priv *pmlmeext = &adapter->mlmeextpriv;
1245
1246         if (pmlmeext->sitesurvey_res.state == SCAN_PROCESS) {
1247                 int ch_set_idx = rtw_ch_set_search_ch(pmlmeext->channel_set, rtw_get_oper_ch(adapter));
1248                 if (ch_set_idx >= 0)
1249                         pmlmeext->channel_set[ch_set_idx].rx_count++;
1250         }
1251
1252         /* add version chk */
1253         if (ver != 0) {
1254                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_data_frame fail! (ver!=0)\n"));
1255                 retval = _FAIL;
1256                 goto exit;
1257         }
1258
1259         type =  GetFrameType(ptr);
1260         subtype = GetFrameSubType(ptr); /* bit(7)~bit(2) */
1261
1262         pattrib->to_fr_ds = get_tofr_ds(ptr);
1263
1264         pattrib->frag_num = GetFragNum(ptr);
1265         pattrib->seq_num = GetSequence(ptr);
1266
1267         pattrib->pw_save = GetPwrMgt(ptr);
1268         pattrib->mfrag = GetMFrag(ptr);
1269         pattrib->mdata = GetMData(ptr);
1270         pattrib->privacy = GetPrivacy(ptr);
1271         pattrib->order = GetOrder(ptr);
1272
1273         /* Dump rx packets */
1274         rtw_hal_get_def_var(adapter, HAL_DEF_DBG_DUMP_RXPKT, &(bDumpRxPkt));
1275         if (bDumpRxPkt == 1) {/* dump all rx packets */
1276                 int i;
1277                 DBG_88E("#############################\n");
1278
1279                 for (i = 0; i < 64; i = i+8)
1280                         DBG_88E("%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:\n", *(ptr+i),
1281                                 *(ptr+i+1), *(ptr+i+2), *(ptr+i+3), *(ptr+i+4), *(ptr+i+5), *(ptr+i+6), *(ptr+i+7));
1282                 DBG_88E("#############################\n");
1283         } else if (bDumpRxPkt == 2) {
1284                 if (type == WIFI_MGT_TYPE) {
1285                         int i;
1286                         DBG_88E("#############################\n");
1287
1288                         for (i = 0; i < 64; i = i+8)
1289                                 DBG_88E("%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:\n", *(ptr+i),
1290                                         *(ptr+i+1), *(ptr+i+2), *(ptr+i+3), *(ptr+i+4), *(ptr+i+5), *(ptr+i+6), *(ptr+i+7));
1291                         DBG_88E("#############################\n");
1292                 }
1293         } else if (bDumpRxPkt == 3) {
1294                 if (type == WIFI_DATA_TYPE) {
1295                         int i;
1296                         DBG_88E("#############################\n");
1297
1298                         for (i = 0; i < 64; i = i+8)
1299                                 DBG_88E("%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:\n", *(ptr+i),
1300                                         *(ptr+i+1), *(ptr+i+2), *(ptr+i+3), *(ptr+i+4), *(ptr+i+5), *(ptr+i+6), *(ptr+i+7));
1301                         DBG_88E("#############################\n");
1302                 }
1303         }
1304         switch (type) {
1305         case WIFI_MGT_TYPE: /* mgnt */
1306                 retval = validate_recv_mgnt_frame(adapter, precv_frame);
1307                 if (retval == _FAIL)
1308                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_mgnt_frame fail\n"));
1309                 retval = _FAIL; /*  only data frame return _SUCCESS */
1310                 break;
1311         case WIFI_CTRL_TYPE: /* ctrl */
1312                 retval = validate_recv_ctrl_frame(adapter, precv_frame);
1313                 if (retval == _FAIL)
1314                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_ctrl_frame fail\n"));
1315                 retval = _FAIL; /*  only data frame return _SUCCESS */
1316                 break;
1317         case WIFI_DATA_TYPE: /* data */
1318                 rtw_led_control(adapter, LED_CTL_RX);
1319                 pattrib->qos = (subtype & BIT(7)) ? 1 : 0;
1320                 retval = validate_recv_data_frame(adapter, precv_frame);
1321                 if (retval == _FAIL) {
1322                         struct recv_priv *precvpriv = &adapter->recvpriv;
1323                         precvpriv->rx_drop++;
1324                 }
1325                 break;
1326         default:
1327                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_data_frame fail! type= 0x%x\n", type));
1328                 retval = _FAIL;
1329                 break;
1330         }
1331
1332 exit:
1333
1334         return retval;
1335 }
1336
1337 /* remove the wlanhdr and add the eth_hdr */
1338
1339 static int wlanhdr_to_ethhdr(struct recv_frame *precvframe)
1340 {
1341         int     rmv_len;
1342         u16     eth_type, len;
1343         __be16 be_tmp;
1344         u8      bsnaphdr;
1345         u8      *psnap_type;
1346         struct ieee80211_snap_hdr       *psnap;
1347
1348         struct adapter          *adapter = precvframe->adapter;
1349         struct mlme_priv        *pmlmepriv = &adapter->mlmepriv;
1350         u8 *ptr = precvframe->rx_data;
1351         struct rx_pkt_attrib *pattrib = &precvframe->attrib;
1352
1353         if (pattrib->encrypt)
1354                 recvframe_pull_tail(precvframe, pattrib->icv_len);
1355
1356         psnap = (struct ieee80211_snap_hdr *)(ptr+pattrib->hdrlen + pattrib->iv_len);
1357         psnap_type = ptr+pattrib->hdrlen + pattrib->iv_len+SNAP_SIZE;
1358         /* convert hdr + possible LLC headers into Ethernet header */
1359         if ((!memcmp(psnap, rtw_rfc1042_header, SNAP_SIZE) &&
1360              (!memcmp(psnap_type, SNAP_ETH_TYPE_IPX, 2) == false) &&
1361              (!memcmp(psnap_type, SNAP_ETH_TYPE_APPLETALK_AARP, 2) == false)) ||
1362              !memcmp(psnap, rtw_bridge_tunnel_header, SNAP_SIZE)) {
1363                 /* remove RFC1042 or Bridge-Tunnel encapsulation and replace EtherType */
1364                 bsnaphdr = true;
1365         } else {
1366                 /* Leave Ethernet header part of hdr and full payload */
1367                 bsnaphdr = false;
1368         }
1369
1370         rmv_len = pattrib->hdrlen + pattrib->iv_len + (bsnaphdr ? SNAP_SIZE : 0);
1371         len = precvframe->len - rmv_len;
1372
1373         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
1374                  ("\n===pattrib->hdrlen: %x,  pattrib->iv_len:%x===\n\n", pattrib->hdrlen,  pattrib->iv_len));
1375
1376         memcpy(&be_tmp, ptr+rmv_len, 2);
1377         eth_type = ntohs(be_tmp); /* pattrib->ether_type */
1378         pattrib->eth_type = eth_type;
1379
1380         if ((check_fwstate(pmlmepriv, WIFI_MP_STATE))) {
1381                 ptr += rmv_len;
1382                 *ptr = 0x87;
1383                 *(ptr+1) = 0x12;
1384
1385                 eth_type = 0x8712;
1386                 /*  append rx status for mp test packets */
1387                 ptr = recvframe_pull(precvframe, (rmv_len-sizeof(struct ethhdr)+2)-24);
1388                 memcpy(ptr, get_rxmem(precvframe), 24);
1389                 ptr += 24;
1390         } else {
1391                 ptr = recvframe_pull(precvframe, (rmv_len-sizeof(struct ethhdr) + (bsnaphdr ? 2 : 0)));
1392         }
1393
1394         memcpy(ptr, pattrib->dst, ETH_ALEN);
1395         memcpy(ptr+ETH_ALEN, pattrib->src, ETH_ALEN);
1396
1397         if (!bsnaphdr) {
1398                 be_tmp = htons(len);
1399                 memcpy(ptr+12, &be_tmp, 2);
1400         }
1401
1402         return _SUCCESS;
1403 }
1404
1405 /* perform defrag */
1406 static struct recv_frame *recvframe_defrag(struct adapter *adapter,
1407                                            struct __queue *defrag_q)
1408 {
1409         struct list_head *plist, *phead;
1410         u8 wlanhdr_offset;
1411         u8      curfragnum;
1412         struct recv_frame *pfhdr, *pnfhdr;
1413         struct recv_frame *prframe, *pnextrframe;
1414         struct __queue *pfree_recv_queue;
1415
1416         curfragnum = 0;
1417         pfree_recv_queue = &adapter->recvpriv.free_recv_queue;
1418
1419         phead = get_list_head(defrag_q);
1420         plist = phead->next;
1421         pfhdr = container_of(plist, struct recv_frame, list);
1422         prframe = (struct recv_frame *)pfhdr;
1423         list_del_init(&(prframe->list));
1424
1425         if (curfragnum != pfhdr->attrib.frag_num) {
1426                 /* the first fragment number must be 0 */
1427                 /* free the whole queue */
1428                 rtw_free_recvframe(prframe, pfree_recv_queue);
1429                 rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
1430
1431                 return NULL;
1432         }
1433
1434         curfragnum++;
1435
1436         plist = get_list_head(defrag_q);
1437
1438         plist = plist->next;
1439
1440         while (phead != plist) {
1441                 pnfhdr = container_of(plist, struct recv_frame, list);
1442                 pnextrframe = (struct recv_frame *)pnfhdr;
1443
1444                 /* check the fragment sequence  (2nd ~n fragment frame) */
1445
1446                 if (curfragnum != pnfhdr->attrib.frag_num) {
1447                         /* the fragment number must be increasing  (after decache) */
1448                         /* release the defrag_q & prframe */
1449                         rtw_free_recvframe(prframe, pfree_recv_queue);
1450                         rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
1451                         return NULL;
1452                 }
1453
1454                 curfragnum++;
1455
1456                 /* copy the 2nd~n fragment frame's payload to the first fragment */
1457                 /* get the 2nd~last fragment frame's payload */
1458
1459                 wlanhdr_offset = pnfhdr->attrib.hdrlen + pnfhdr->attrib.iv_len;
1460
1461                 recvframe_pull(pnextrframe, wlanhdr_offset);
1462
1463                 /* append  to first fragment frame's tail (if privacy frame, pull the ICV) */
1464                 recvframe_pull_tail(prframe, pfhdr->attrib.icv_len);
1465
1466                 /* memcpy */
1467                 memcpy(pfhdr->rx_tail, pnfhdr->rx_data, pnfhdr->len);
1468
1469                 recvframe_put(prframe, pnfhdr->len);
1470
1471                 pfhdr->attrib.icv_len = pnfhdr->attrib.icv_len;
1472                 plist = plist->next;
1473         }
1474
1475         /* free the defrag_q queue and return the prframe */
1476         rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
1477
1478         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("Performance defrag!!!!!\n"));
1479
1480         return prframe;
1481 }
1482
1483 /* check if need to defrag, if needed queue the frame to defrag_q */
1484 struct recv_frame *recvframe_chk_defrag(struct adapter *padapter,
1485                                         struct recv_frame *precv_frame)
1486 {
1487         u8      ismfrag;
1488         u8      fragnum;
1489         u8      *psta_addr;
1490         struct recv_frame *pfhdr;
1491         struct sta_info *psta;
1492         struct sta_priv *pstapriv;
1493         struct list_head *phead;
1494         struct recv_frame *prtnframe = NULL;
1495         struct __queue *pfree_recv_queue, *pdefrag_q;
1496
1497         pstapriv = &padapter->stapriv;
1498
1499         pfhdr = precv_frame;
1500
1501         pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
1502
1503         /* need to define struct of wlan header frame ctrl */
1504         ismfrag = pfhdr->attrib.mfrag;
1505         fragnum = pfhdr->attrib.frag_num;
1506
1507         psta_addr = pfhdr->attrib.ta;
1508         psta = rtw_get_stainfo(pstapriv, psta_addr);
1509         if (psta == NULL) {
1510                 u8 type = GetFrameType(pfhdr->rx_data);
1511                 if (type != WIFI_DATA_TYPE) {
1512                         psta = rtw_get_bcmc_stainfo(padapter);
1513                         pdefrag_q = &psta->sta_recvpriv.defrag_q;
1514                 } else {
1515                         pdefrag_q = NULL;
1516                 }
1517         } else {
1518                 pdefrag_q = &psta->sta_recvpriv.defrag_q;
1519         }
1520
1521         if ((ismfrag == 0) && (fragnum == 0))
1522                 prtnframe = precv_frame;/* isn't a fragment frame */
1523
1524         if (ismfrag == 1) {
1525                 /* 0~(n-1) fragment frame */
1526                 /* enqueue to defraf_g */
1527                 if (pdefrag_q != NULL) {
1528                         if (fragnum == 0) {
1529                                 /* the first fragment */
1530                                 if (!list_empty(&pdefrag_q->queue)) {
1531                                         /* free current defrag_q */
1532                                         rtw_free_recvframe_queue(pdefrag_q, pfree_recv_queue);
1533                                 }
1534                         }
1535
1536                         /* Then enqueue the 0~(n-1) fragment into the defrag_q */
1537
1538                         phead = get_list_head(pdefrag_q);
1539                         list_add_tail(&pfhdr->list, phead);
1540
1541                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("Enqueuq: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1542
1543                         prtnframe = NULL;
1544                 } else {
1545                         /* can't find this ta's defrag_queue, so free this recv_frame */
1546                         rtw_free_recvframe(precv_frame, pfree_recv_queue);
1547                         prtnframe = NULL;
1548                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("Free because pdefrag_q==NULL: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1549                 }
1550         }
1551
1552         if ((ismfrag == 0) && (fragnum != 0)) {
1553                 /* the last fragment frame */
1554                 /* enqueue the last fragment */
1555                 if (pdefrag_q != NULL) {
1556                         phead = get_list_head(pdefrag_q);
1557                         list_add_tail(&pfhdr->list, phead);
1558
1559                         /* call recvframe_defrag to defrag */
1560                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("defrag: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1561                         precv_frame = recvframe_defrag(padapter, pdefrag_q);
1562                         prtnframe = precv_frame;
1563                 } else {
1564                         /* can't find this ta's defrag_queue, so free this recv_frame */
1565                         rtw_free_recvframe(precv_frame, pfree_recv_queue);
1566                         prtnframe = NULL;
1567                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("Free because pdefrag_q==NULL: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1568                 }
1569         }
1570
1571         if ((prtnframe != NULL) && (prtnframe->attrib.privacy)) {
1572                 /* after defrag we must check tkip mic code */
1573                 if (recvframe_chkmic(padapter,  prtnframe) == _FAIL) {
1574                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recvframe_chkmic(padapter,  prtnframe)==_FAIL\n"));
1575                         rtw_free_recvframe(prtnframe, pfree_recv_queue);
1576                         prtnframe = NULL;
1577                 }
1578         }
1579
1580         return prtnframe;
1581 }
1582
1583 static int amsdu_to_msdu(struct adapter *padapter, struct recv_frame *prframe)
1584 {
1585         int     a_len, padding_len;
1586         u16     eth_type, nSubframe_Length;
1587         u8      nr_subframes, i;
1588         unsigned char *pdata;
1589         struct rx_pkt_attrib *pattrib;
1590         unsigned char *data_ptr;
1591         struct sk_buff *sub_skb, *subframes[MAX_SUBFRAME_COUNT];
1592         struct recv_priv *precvpriv = &padapter->recvpriv;
1593         struct __queue *pfree_recv_queue = &(precvpriv->free_recv_queue);
1594         nr_subframes = 0;
1595
1596         pattrib = &prframe->attrib;
1597
1598         recvframe_pull(prframe, prframe->attrib.hdrlen);
1599
1600         if (prframe->attrib.iv_len > 0)
1601                 recvframe_pull(prframe, prframe->attrib.iv_len);
1602
1603         a_len = prframe->len;
1604
1605         pdata = prframe->rx_data;
1606
1607         while (a_len > ETH_HLEN) {
1608                 /* Offset 12 denote 2 mac address */
1609                 nSubframe_Length = get_unaligned_be16(pdata + 12);
1610
1611                 if (a_len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
1612                         DBG_88E("nRemain_Length is %d and nSubframe_Length is : %d\n", a_len, nSubframe_Length);
1613                         goto exit;
1614                 }
1615
1616                 /* move the data point to data content */
1617                 pdata += ETH_HLEN;
1618                 a_len -= ETH_HLEN;
1619
1620                 /* Allocate new skb for releasing to upper layer */
1621                 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
1622                 if (sub_skb) {
1623                         skb_reserve(sub_skb, 12);
1624                         data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
1625                         memcpy(data_ptr, pdata, nSubframe_Length);
1626                 } else {
1627                         sub_skb = skb_clone(prframe->pkt, GFP_ATOMIC);
1628                         if (sub_skb) {
1629                                 sub_skb->data = pdata;
1630                                 sub_skb->len = nSubframe_Length;
1631                                 skb_set_tail_pointer(sub_skb, nSubframe_Length);
1632                         } else {
1633                                 DBG_88E("skb_clone() Fail!!! , nr_subframes=%d\n", nr_subframes);
1634                                 break;
1635                         }
1636                 }
1637
1638                 subframes[nr_subframes++] = sub_skb;
1639
1640                 if (nr_subframes >= MAX_SUBFRAME_COUNT) {
1641                         DBG_88E("ParseSubframe(): Too many Subframes! Packets dropped!\n");
1642                         break;
1643                 }
1644
1645                 pdata += nSubframe_Length;
1646                 a_len -= nSubframe_Length;
1647                 if (a_len != 0) {
1648                         padding_len = 4 - ((nSubframe_Length + ETH_HLEN) & (4-1));
1649                         if (padding_len == 4) {
1650                                 padding_len = 0;
1651                         }
1652
1653                         if (a_len < padding_len) {
1654                                 goto exit;
1655                         }
1656                         pdata += padding_len;
1657                         a_len -= padding_len;
1658                 }
1659         }
1660
1661         for (i = 0; i < nr_subframes; i++) {
1662                 sub_skb = subframes[i];
1663                 /* convert hdr + possible LLC headers into Ethernet header */
1664                 eth_type = get_unaligned_be16(&sub_skb->data[6]);
1665                 if (sub_skb->len >= 8 &&
1666                     ((!memcmp(sub_skb->data, rtw_rfc1042_header, SNAP_SIZE) &&
1667                           eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) ||
1668                          !memcmp(sub_skb->data, rtw_bridge_tunnel_header, SNAP_SIZE))) {
1669                         /* remove RFC1042 or Bridge-Tunnel encapsulation and replace EtherType */
1670                         skb_pull(sub_skb, SNAP_SIZE);
1671                         memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
1672                         memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
1673                 } else {
1674                         __be16 len;
1675                         /* Leave Ethernet header part of hdr and full payload */
1676                         len = htons(sub_skb->len);
1677                         memcpy(skb_push(sub_skb, 2), &len, 2);
1678                         memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
1679                         memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
1680                 }
1681
1682                 /* Indicate the packets to upper layer */
1683                 /*  Insert NAT2.5 RX here! */
1684                 sub_skb->protocol = eth_type_trans(sub_skb, padapter->pnetdev);
1685                 sub_skb->dev = padapter->pnetdev;
1686
1687                 sub_skb->ip_summed = CHECKSUM_NONE;
1688
1689                 netif_rx(sub_skb);
1690         }
1691
1692 exit:
1693
1694         prframe->len = 0;
1695         rtw_free_recvframe(prframe, pfree_recv_queue);/* free this recv_frame */
1696
1697         return _SUCCESS;
1698 }
1699
1700 static int check_indicate_seq(struct recv_reorder_ctrl *preorder_ctrl, u16 seq_num)
1701 {
1702         u8      wsize = preorder_ctrl->wsize_b;
1703         u16     wend = (preorder_ctrl->indicate_seq + wsize - 1) & 0xFFF;/*  4096; */
1704
1705         /*  Rx Reorder initialize condition. */
1706         if (preorder_ctrl->indicate_seq == 0xFFFF)
1707                 preorder_ctrl->indicate_seq = seq_num;
1708
1709         /*  Drop out the packet which SeqNum is smaller than WinStart */
1710         if (SN_LESS(seq_num, preorder_ctrl->indicate_seq))
1711                 return false;
1712
1713         /*  */
1714         /*  Sliding window manipulation. Conditions includes: */
1715         /*  1. Incoming SeqNum is equal to WinStart =>Window shift 1 */
1716         /*  2. Incoming SeqNum is larger than the WinEnd => Window shift N */
1717         /*  */
1718         if (SN_EQUAL(seq_num, preorder_ctrl->indicate_seq)) {
1719                 preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1) & 0xFFF;
1720         } else if (SN_LESS(wend, seq_num)) {
1721                 if (seq_num >= (wsize - 1))
1722                         preorder_ctrl->indicate_seq = seq_num + 1 - wsize;
1723                 else
1724                         preorder_ctrl->indicate_seq = 0xFFF - (wsize - (seq_num + 1)) + 1;
1725         }
1726
1727         return true;
1728 }
1729
1730 static int enqueue_reorder_recvframe(struct recv_reorder_ctrl *preorder_ctrl,
1731                                      struct recv_frame *prframe)
1732 {
1733         struct rx_pkt_attrib *pattrib = &prframe->attrib;
1734         struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1735         struct list_head *phead, *plist;
1736         struct recv_frame *hdr;
1737         struct rx_pkt_attrib *pnextattrib;
1738
1739         phead = get_list_head(ppending_recvframe_queue);
1740         plist = phead->next;
1741
1742         while (phead != plist) {
1743                 hdr = container_of(plist, struct recv_frame, list);
1744                 pnextattrib = &hdr->attrib;
1745
1746                 if (SN_LESS(pnextattrib->seq_num, pattrib->seq_num))
1747                         plist = plist->next;
1748                 else if (SN_EQUAL(pnextattrib->seq_num, pattrib->seq_num))
1749                         return false;
1750                 else
1751                         break;
1752         }
1753
1754         list_del_init(&(prframe->list));
1755
1756         list_add_tail(&(prframe->list), plist);
1757         return true;
1758 }
1759
1760 static int recv_indicatepkts_in_order(struct adapter *padapter, struct recv_reorder_ctrl *preorder_ctrl, int bforced)
1761 {
1762         struct list_head *phead, *plist;
1763         struct recv_frame *prframe;
1764         struct recv_frame *prhdr;
1765         struct rx_pkt_attrib *pattrib;
1766         int bPktInBuf = false;
1767         struct recv_priv *precvpriv = &padapter->recvpriv;
1768         struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1769
1770         phead =         get_list_head(ppending_recvframe_queue);
1771         plist = phead->next;
1772
1773         /*  Handling some condition for forced indicate case. */
1774         if (bforced) {
1775                 if (list_empty(phead))
1776                         return true;
1777
1778                 prhdr = container_of(plist, struct recv_frame, list);
1779                 pattrib = &prhdr->attrib;
1780                 preorder_ctrl->indicate_seq = pattrib->seq_num;
1781         }
1782
1783         /*  Prepare indication list and indication. */
1784         /*  Check if there is any packet need indicate. */
1785         while (!list_empty(phead)) {
1786                 prhdr = container_of(plist, struct recv_frame, list);
1787                 prframe = (struct recv_frame *)prhdr;
1788                 pattrib = &prframe->attrib;
1789
1790                 if (!SN_LESS(preorder_ctrl->indicate_seq, pattrib->seq_num)) {
1791                         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_,
1792                                  ("recv_indicatepkts_in_order: indicate=%d seq=%d amsdu=%d\n",
1793                                   preorder_ctrl->indicate_seq, pattrib->seq_num, pattrib->amsdu));
1794                         plist = plist->next;
1795                         list_del_init(&(prframe->list));
1796
1797                         if (SN_EQUAL(preorder_ctrl->indicate_seq, pattrib->seq_num))
1798                                 preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1) & 0xFFF;
1799
1800                         /* Set this as a lock to make sure that only one thread is indicating packet. */
1801
1802                         /* indicate this recv_frame */
1803                         if (!pattrib->amsdu) {
1804                                 if ((!padapter->bDriverStopped) &&
1805                                     (!padapter->bSurpriseRemoved))
1806                                         rtw_recv_indicatepkt(padapter, prframe);/* indicate this recv_frame */
1807                         } else if (pattrib->amsdu == 1) {
1808                                 if (amsdu_to_msdu(padapter, prframe) != _SUCCESS)
1809                                         rtw_free_recvframe(prframe, &precvpriv->free_recv_queue);
1810                         } else {
1811                                 /* error condition; */
1812                         }
1813
1814                         /* Update local variables. */
1815                         bPktInBuf = false;
1816                 } else {
1817                         bPktInBuf = true;
1818                         break;
1819                 }
1820         }
1821         return bPktInBuf;
1822 }
1823
1824 static int recv_indicatepkt_reorder(struct adapter *padapter,
1825                                     struct recv_frame *prframe)
1826 {
1827         int retval = _SUCCESS;
1828         struct rx_pkt_attrib *pattrib = &prframe->attrib;
1829         struct recv_reorder_ctrl *preorder_ctrl = prframe->preorder_ctrl;
1830         struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1831
1832         if (!pattrib->amsdu) {
1833                 /* s1. */
1834                 wlanhdr_to_ethhdr(prframe);
1835
1836                 if ((pattrib->qos != 1) || (pattrib->eth_type == 0x0806) ||
1837                     (pattrib->ack_policy != 0)) {
1838                         if ((!padapter->bDriverStopped) &&
1839                             (!padapter->bSurpriseRemoved)) {
1840                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("@@@@  recv_indicatepkt_reorder -recv_func recv_indicatepkt\n"));
1841
1842                                 rtw_recv_indicatepkt(padapter, prframe);
1843                                 return _SUCCESS;
1844                         }
1845
1846                         return _FAIL;
1847                 }
1848
1849                 if (!preorder_ctrl->enable) {
1850                         /* indicate this recv_frame */
1851                         preorder_ctrl->indicate_seq = pattrib->seq_num;
1852                         rtw_recv_indicatepkt(padapter, prframe);
1853
1854                         preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1)%4096;
1855                         return _SUCCESS;
1856                 }
1857         } else if (pattrib->amsdu == 1) { /* temp filter -> means didn't support A-MSDUs in a A-MPDU */
1858                 if (!preorder_ctrl->enable) {
1859                         preorder_ctrl->indicate_seq = pattrib->seq_num;
1860                         retval = amsdu_to_msdu(padapter, prframe);
1861
1862                         preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1)%4096;
1863                         return retval;
1864                 }
1865         }
1866
1867         spin_lock_bh(&ppending_recvframe_queue->lock);
1868
1869         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_,
1870                  ("recv_indicatepkt_reorder: indicate=%d seq=%d\n",
1871                   preorder_ctrl->indicate_seq, pattrib->seq_num));
1872
1873         /* s2. check if winstart_b(indicate_seq) needs to been updated */
1874         if (!check_indicate_seq(preorder_ctrl, pattrib->seq_num)) {
1875                 rtw_recv_indicatepkt(padapter, prframe);
1876
1877                 spin_unlock_bh(&ppending_recvframe_queue->lock);
1878
1879                 goto _success_exit;
1880         }
1881
1882         /* s3. Insert all packet into Reorder Queue to maintain its ordering. */
1883         if (!enqueue_reorder_recvframe(preorder_ctrl, prframe))
1884                 goto _err_exit;
1885
1886         /* s4. */
1887         /*  Indication process. */
1888         /*  After Packet dropping and Sliding Window shifting as above, we can now just indicate the packets */
1889         /*  with the SeqNum smaller than latest WinStart and buffer other packets. */
1890         /*  */
1891         /*  For Rx Reorder condition: */
1892         /*  1. All packets with SeqNum smaller than WinStart => Indicate */
1893         /*  2. All packets with SeqNum larger than or equal to WinStart => Buffer it. */
1894         /*  */
1895
1896         /* recv_indicatepkts_in_order(padapter, preorder_ctrl, true); */
1897         if (recv_indicatepkts_in_order(padapter, preorder_ctrl, false)) {
1898                 mod_timer(&preorder_ctrl->reordering_ctrl_timer,
1899                           jiffies + msecs_to_jiffies(REORDER_WAIT_TIME));
1900                 spin_unlock_bh(&ppending_recvframe_queue->lock);
1901         } else {
1902                 spin_unlock_bh(&ppending_recvframe_queue->lock);
1903                 del_timer_sync(&preorder_ctrl->reordering_ctrl_timer);
1904         }
1905
1906 _success_exit:
1907
1908         return _SUCCESS;
1909
1910 _err_exit:
1911
1912         spin_unlock_bh(&ppending_recvframe_queue->lock);
1913
1914         return _FAIL;
1915 }
1916
1917 void rtw_reordering_ctrl_timeout_handler(unsigned long data)
1918 {
1919         struct recv_reorder_ctrl *preorder_ctrl = (struct recv_reorder_ctrl *)data;
1920         struct adapter *padapter = preorder_ctrl->padapter;
1921         struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1922
1923         if (padapter->bDriverStopped || padapter->bSurpriseRemoved)
1924                 return;
1925
1926         spin_lock_bh(&ppending_recvframe_queue->lock);
1927
1928         if (recv_indicatepkts_in_order(padapter, preorder_ctrl, true) == true)
1929                 mod_timer(&preorder_ctrl->reordering_ctrl_timer,
1930                           jiffies + msecs_to_jiffies(REORDER_WAIT_TIME));
1931
1932         spin_unlock_bh(&ppending_recvframe_queue->lock);
1933 }
1934
1935 static int process_recv_indicatepkts(struct adapter *padapter,
1936                                      struct recv_frame *prframe)
1937 {
1938         int retval = _SUCCESS;
1939         struct mlme_priv        *pmlmepriv = &padapter->mlmepriv;
1940         struct ht_priv  *phtpriv = &pmlmepriv->htpriv;
1941
1942         if (phtpriv->ht_option) {  /* B/G/N Mode */
1943                 if (recv_indicatepkt_reorder(padapter, prframe) != _SUCCESS) {
1944                         /*  including perform A-MPDU Rx Ordering Buffer Control */
1945                         if ((!padapter->bDriverStopped) &&
1946                             (!padapter->bSurpriseRemoved)) {
1947                                 retval = _FAIL;
1948                                 return retval;
1949                         }
1950                 }
1951         } else { /* B/G mode */
1952                 retval = wlanhdr_to_ethhdr(prframe);
1953                 if (retval != _SUCCESS) {
1954                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("wlanhdr_to_ethhdr: drop pkt\n"));
1955                         return retval;
1956                 }
1957
1958                 if ((!padapter->bDriverStopped) &&
1959                     (!padapter->bSurpriseRemoved)) {
1960                         /* indicate this recv_frame */
1961                         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("@@@@ process_recv_indicatepkts- recv_func recv_indicatepkt\n"));
1962                         rtw_recv_indicatepkt(padapter, prframe);
1963                 } else {
1964                         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("@@@@ process_recv_indicatepkts- recv_func free_indicatepkt\n"));
1965
1966                         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("recv_func:bDriverStopped(%d) OR bSurpriseRemoved(%d)", padapter->bDriverStopped, padapter->bSurpriseRemoved));
1967                         retval = _FAIL;
1968                         return retval;
1969                 }
1970         }
1971
1972         return retval;
1973 }
1974
1975 static int recv_func_prehandle(struct adapter *padapter,
1976                                struct recv_frame *rframe)
1977 {
1978         int ret = _SUCCESS;
1979         struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
1980
1981         /* check the frame crtl field and decache */
1982         ret = validate_recv_frame(padapter, rframe);
1983         if (ret != _SUCCESS) {
1984                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("recv_func: validate_recv_frame fail! drop pkt\n"));
1985                 rtw_free_recvframe(rframe, pfree_recv_queue);/* free this recv_frame */
1986                 goto exit;
1987         }
1988
1989 exit:
1990         return ret;
1991 }
1992
1993 static int recv_func_posthandle(struct adapter *padapter,
1994                                 struct recv_frame *prframe)
1995 {
1996         int ret = _SUCCESS;
1997         struct recv_frame *orig_prframe = prframe;
1998         struct recv_priv *precvpriv = &padapter->recvpriv;
1999         struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
2000
2001         /*  DATA FRAME */
2002         rtw_led_control(padapter, LED_CTL_RX);
2003
2004         prframe = decryptor(padapter, prframe);
2005         if (prframe == NULL) {
2006                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("decryptor: drop pkt\n"));
2007                 ret = _FAIL;
2008                 goto _recv_data_drop;
2009         }
2010
2011         prframe = recvframe_chk_defrag(padapter, prframe);
2012         if (prframe == NULL) {
2013                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recvframe_chk_defrag: drop pkt\n"));
2014                 goto _recv_data_drop;
2015         }
2016
2017         prframe = portctrl(padapter, prframe);
2018         if (prframe == NULL) {
2019                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("portctrl: drop pkt\n"));
2020                 ret = _FAIL;
2021                 goto _recv_data_drop;
2022         }
2023
2024         count_rx_stats(padapter, prframe, NULL);
2025
2026         ret = process_recv_indicatepkts(padapter, prframe);
2027         if (ret != _SUCCESS) {
2028                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recv_func: process_recv_indicatepkts fail!\n"));
2029                 rtw_free_recvframe(orig_prframe, pfree_recv_queue);/* free this recv_frame */
2030                 goto _recv_data_drop;
2031         }
2032         return ret;
2033
2034 _recv_data_drop:
2035         precvpriv->rx_drop++;
2036         return ret;
2037 }
2038
2039 static int recv_func(struct adapter *padapter, struct recv_frame *rframe)
2040 {
2041         int ret;
2042         struct rx_pkt_attrib *prxattrib = &rframe->attrib;
2043         struct security_priv *psecuritypriv = &padapter->securitypriv;
2044         struct mlme_priv *mlmepriv = &padapter->mlmepriv;
2045
2046         /* check if need to handle uc_swdec_pending_queue*/
2047         if (check_fwstate(mlmepriv, WIFI_STATION_STATE) && psecuritypriv->busetkipkey) {
2048                 struct recv_frame *pending_frame;
2049
2050                 while ((pending_frame = rtw_alloc_recvframe(&padapter->recvpriv.uc_swdec_pending_queue))) {
2051                         if (recv_func_posthandle(padapter, pending_frame) == _SUCCESS)
2052                                 DBG_88E("%s: dequeue uc_swdec_pending_queue\n", __func__);
2053                 }
2054         }
2055
2056         ret = recv_func_prehandle(padapter, rframe);
2057
2058         if (ret == _SUCCESS) {
2059                 /* check if need to enqueue into uc_swdec_pending_queue*/
2060                 if (check_fwstate(mlmepriv, WIFI_STATION_STATE) &&
2061                     !IS_MCAST(prxattrib->ra) && prxattrib->encrypt > 0 &&
2062                     (prxattrib->bdecrypted == 0 || psecuritypriv->sw_decrypt) &&
2063                     !is_wep_enc(psecuritypriv->dot11PrivacyAlgrthm) &&
2064                     !psecuritypriv->busetkipkey) {
2065                         rtw_enqueue_recvframe(rframe, &padapter->recvpriv.uc_swdec_pending_queue);
2066                         DBG_88E("%s: no key, enqueue uc_swdec_pending_queue\n", __func__);
2067                         goto exit;
2068                 }
2069
2070                 ret = recv_func_posthandle(padapter, rframe);
2071         }
2072
2073 exit:
2074         return ret;
2075 }
2076
2077 s32 rtw_recv_entry(struct recv_frame *precvframe)
2078 {
2079         struct adapter *padapter;
2080         struct recv_priv *precvpriv;
2081         s32 ret = _SUCCESS;
2082
2083         padapter = precvframe->adapter;
2084
2085         precvpriv = &padapter->recvpriv;
2086
2087         ret = recv_func(padapter, precvframe);
2088         if (ret == _FAIL) {
2089                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("rtw_recv_entry: recv_func return fail!!!\n"));
2090                 goto _recv_entry_drop;
2091         }
2092
2093         precvpriv->rx_pkts++;
2094
2095         return ret;
2096
2097 _recv_entry_drop:
2098         return ret;
2099 }
2100
2101 void rtw_signal_stat_timer_hdl(unsigned long data)
2102 {
2103         struct adapter *adapter = (struct adapter *)data;
2104         struct recv_priv *recvpriv = &adapter->recvpriv;
2105
2106         u32 tmp_s, tmp_q;
2107         u8 avg_signal_strength = 0;
2108         u8 avg_signal_qual = 0;
2109         u8 _alpha = 3; /*  this value is based on converging_constant = 5000 and sampling_interval = 1000 */
2110
2111         if (adapter->recvpriv.is_signal_dbg) {
2112                 /* update the user specific value, signal_strength_dbg, to signal_strength, rssi */
2113                 adapter->recvpriv.signal_strength = adapter->recvpriv.signal_strength_dbg;
2114                 adapter->recvpriv.rssi = (s8)translate_percentage_to_dbm((u8)adapter->recvpriv.signal_strength_dbg);
2115         } else {
2116                 if (recvpriv->signal_strength_data.update_req == 0) {/*  update_req is clear, means we got rx */
2117                         avg_signal_strength = recvpriv->signal_strength_data.avg_val;
2118                         /*  after avg_vals are acquired, we can re-stat the signal values */
2119                         recvpriv->signal_strength_data.update_req = 1;
2120                 }
2121
2122                 if (recvpriv->signal_qual_data.update_req == 0) {/*  update_req is clear, means we got rx */
2123                         avg_signal_qual = recvpriv->signal_qual_data.avg_val;
2124                         /*  after avg_vals are acquired, we can re-stat the signal values */
2125                         recvpriv->signal_qual_data.update_req = 1;
2126                 }
2127
2128                 /* update value of signal_strength, rssi, signal_qual */
2129                 if (check_fwstate(&adapter->mlmepriv, _FW_UNDER_SURVEY) == false) {
2130                         tmp_s = avg_signal_strength+(_alpha-1)*recvpriv->signal_strength;
2131                         if (tmp_s % _alpha)
2132                                 tmp_s = tmp_s/_alpha + 1;
2133                         else
2134                                 tmp_s = tmp_s/_alpha;
2135                         if (tmp_s > 100)
2136                                 tmp_s = 100;
2137
2138                         tmp_q = avg_signal_qual+(_alpha-1)*recvpriv->signal_qual;
2139                         if (tmp_q % _alpha)
2140                                 tmp_q = tmp_q/_alpha + 1;
2141                         else
2142                                 tmp_q = tmp_q/_alpha;
2143                         if (tmp_q > 100)
2144                                 tmp_q = 100;
2145
2146                         recvpriv->signal_strength = tmp_s;
2147                         recvpriv->rssi = (s8)translate_percentage_to_dbm(tmp_s);
2148                         recvpriv->signal_qual = tmp_q;
2149                 }
2150         }
2151         rtw_set_signal_stat_timer(recvpriv);
2152 }